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1 Commits
main ... functional

Author SHA1 Message Date
Tony Garnock-Jones c4d9555108 Experimental (parked for now) non-imperative implementation of dataflow.rkt 2016-11-29 12:25:54 +13:00
433 changed files with 2062 additions and 28692 deletions
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17
README.md
View File

@ -47,19 +47,6 @@ This repository contains
- a sketch of a Haskell implementation of the core routing structures
of Syndicate in `hs/`
## Copyright and License
## Copyright
Copyright © Tony Garnock-Jones 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Copyright &copy; Tony Garnock-Jones 2010, 2011, 2012, 2013, 2014, 2015, 2016.

2
examples/ircd/.gitignore vendored
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@ -1,2 +0,0 @@
scratch/
compiled/

7
examples/ircd/Makefile
View File

@ -1,7 +0,0 @@
all:
run:
raco make main.rkt && racket main.rkt
clean:
rm -rf compiled

17
examples/ircd/TODO.md
View File

@ -1,17 +0,0 @@
Try changing the motd and saving the file. It'll reload. The log
messages suggest that the server is dropping extant connection - as
expected - but it immediately comes back momentarily before going away
properly. The session is able to reboot due to the glitching in
assertion of the listen port *more quickly* than the latency of
teardown of the previous connection; so the new session-listener
responds to the assertions from the old connection before the old
connection has a chance to die. Of course, it *does* die (since commit
11de40c), but having that zombie reborn new session is annoying.
- This is thorny. You'd think that having a session wait for its
line-reader to go would be enough, but the multiple nested
during/spawns creating the sessions mean that no matter how long
the old session instance sticks around, a new session will appear
before we're ready! ... maybe there's no way *at all* to
disambiguate old/new instances without, say, a unique
listener-socket identifier??

24
examples/ircd/channel.rkt
View File

@ -1,24 +0,0 @@
#lang syndicate
(require "protocol.rkt")
(require "message.rkt")
(require/activate syndicate/reload)
(spawn #:name 'channel-factory
(stop-when-reloaded)
(during/spawn (ircd-channel-member $Ch _)
#:name `(ircd-channel ,Ch)
(field [topic #f])
(assert (ircd-channel-topic Ch (topic)))
(on (message (ircd-action $who (irc-message _ "MODE" (list Ch "b") _)))
(send! (ircd-event who (irc-message server-prefix 368 (list (lookup-nick who) Ch)
"End of Channel Ban List"))))
(on (message (ircd-action $who (irc-message _ "MODE" (list Ch) _)))
(send! (ircd-event who (irc-message server-prefix 324
(list (lookup-nick who) Ch "+") #f))))
(on (message (ircd-action _ (irc-message _ "TOPIC" (list Ch) $new-topic)))
(topic new-topic))))

14
examples/ircd/config.rkt
View File

@ -1,14 +0,0 @@
#lang syndicate
(require/activate syndicate/reload)
(require/activate syndicate/supervise)
(require/activate syndicate/drivers/config)
(require "protocol.rkt")
(spawn #:name 'config
(stop-when-reloaded)
(assert (ircd-motd (list "Hello, world!")))
(assert (ircd-listener 6667)))

7
examples/ircd/main.rkt
View File

@ -1,7 +0,0 @@
#lang syndicate
(require/activate syndicate/reload)
(spawn-reloader "config.rkt")
(spawn-reloader "session.rkt")
(spawn-reloader "channel.rkt")

93
examples/ircd/message.rkt
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@ -1,93 +0,0 @@
#lang racket/base
(provide (struct-out irc-message)
(struct-out irc-user)
(struct-out irc-privmsg)
(struct-out irc-source-servername)
(struct-out irc-source-nick)
parse-irc-message
render-irc-message
;; TODO make these assertions in the dataspace:
server-name
server-prefix)
(require racket/string)
(require racket/match)
(require racket/format)
;; <message> ::= [':' <prefix> <SPACE> ] <command> <params> <crlf>
;; <prefix> ::= <servername> | <nick> [ '!' <user> ] [ '@' <host> ]
;; <command> ::= <letter> { <letter> } | <number> <number> <number>
;; <SPACE> ::= ' ' { ' ' }
;; <params> ::= <SPACE> [ ':' <trailing> | <middle> <params> ]
;;
;; <middle> ::= <Any *non-empty* sequence of octets not including SPACE
;; or NUL or CR or LF, the first of which may not be ':'>
;; <trailing> ::= <Any, possibly *empty*, sequence of octets not including
;; NUL or CR or LF>
;;
;; <crlf> ::= CR LF
;; <target> ::= <to> [ "," <target> ]
;; <to> ::= <channel> | <user> '@' <servername> | <nick> | <mask>
;; <channel> ::= ('#' | '&') <chstring>
;; <servername> ::= <host>
;; <host> ::= see RFC 952 [DNS:4] for details on allowed hostnames
;; <nick> ::= <letter> { <letter> | <number> | <special> }
;; <mask> ::= ('#' | '$') <chstring>
;; <chstring> ::= <any 8bit code except SPACE, BELL, NUL, CR, LF and
;; comma (',')>
;; <user> ::= <nonwhite> { <nonwhite> }
;; <letter> ::= 'a' ... 'z' | 'A' ... 'Z'
;; <number> ::= '0' ... '9'
;; <special> ::= '-' | '[' | ']' | '\' | '`' | '^' | '{' | '}'
;; <nonwhite> ::= <any 8bit code except SPACE (0x20), NUL (0x0), CR
;; (0xd), and LF (0xa)>
(struct irc-message (prefix command params trailing) #:prefab)
(struct irc-user (username hostname realname) #:prefab)
(struct irc-privmsg (source target text) #:prefab)
(struct irc-source-servername (servername) #:prefab)
(struct irc-source-nick (nick user) #:prefab)
(define (parse-irc-message line0)
(match (string-trim #:left? #f line0 #px"[\r\n]")
[(pregexp #px"^:([^ ]+) +(.*)$" (list _ prefix rest)) (parse-command prefix rest)]
[line (parse-command #f line)]))
(define (parse-command prefix line)
(match-define (pregexp #px"^([^ ]+)( +([^:]+)?(:(.*))?)?$" (list _ command _ params _ rest)) line)
(irc-message prefix
(string-upcase command)
(string-split (or params ""))
rest))
;; libpurple's irc protocol support crashes (!) (SIGSEGV) if you send
;; a prefix on a JOIN event from the server as just "nick" rather than
;; "nick!user@host" - specifically, it will crash if "!" doesn't
;; appear in the prefix.
;;
(define (render-irc-message m)
(match-define (irc-message prefix command params trailing) m)
(string-append (render-prefix prefix)
(~a command)
(if (pair? params) (string-append " " (string-join (map ~a params))) "")
(if trailing (string-append " :" trailing) "")))
(define (render-prefix p)
(match p
[#f
""]
[(irc-source-servername servername)
(format ":~a " servername)]
[(irc-source-nick nick (irc-user username hostname _))
(format ":~a!~a@~a " nick username hostname)]))
(define server-name "syndicate-ircd")
(define server-prefix (irc-source-servername "syndicate-ircd.example"))

30
examples/ircd/protocol.rkt
View File

@ -1,30 +0,0 @@
#lang syndicate
(provide (struct-out ircd-listener)
(struct-out ircd-motd)
(struct-out ircd-connection-info)
(struct-out ircd-channel-member)
(struct-out ircd-channel-topic)
(struct-out ircd-action)
(struct-out ircd-event)
lookup-nick)
;; A Connection is a TcpAddress
(struct ircd-listener (port) #:prefab) ;; assertion
(struct ircd-motd (lines) #:prefab) ;; assertion
(struct ircd-connection-info (conn nick user) #:prefab) ;;assertion
(struct ircd-channel-member (channel conn) #:prefab) ;; assertion
(struct ircd-channel-topic (channel topic) #:prefab) ;; assertion
(struct ircd-action (conn message) #:prefab) ;; message
(struct ircd-event (conn message) #:prefab) ;; message
;;---------------------------------------------------------------------------
(define (lookup-nick conn)
(immediate-query [query-value #f (ircd-connection-info conn $N _) N]))

177
examples/ircd/session.rkt
View File

@ -1,177 +0,0 @@
#lang syndicate
(require racket/set)
(require racket/string)
(require "protocol.rkt")
(require "message.rkt")
(require/activate syndicate/reload)
(require/activate syndicate/drivers/tcp)
(require/activate syndicate/drivers/line-reader)
(require syndicate/protocol/advertise)
(require syndicate/support/hash)
(define (ircd-connection-facet this-conn server-handle)
(define (send-to-remote #:newline [with-newline #t] fmt . vs)
(define bs (string->bytes/utf-8 (apply format fmt vs)))
(log-info "~a <- ~v" this-conn bs)
(send! (tcp-channel server-handle this-conn (if with-newline (bytes-append bs #"\r\n") bs))))
(define (send-irc-message m)
(send-to-remote "~a" (render-irc-message m)))
(define (send* #:source [prefix server-prefix] #:trailing [trailing #f] command . params)
(send-irc-message (irc-message prefix command params trailing)))
(on-start (log-info "Connecting ~a" this-conn))
(on-stop (log-info "Disconnecting ~a" this-conn))
(field [nick #f]
[user #f])
(define/dataflow conn-info (ircd-connection-info this-conn (nick) (user)))
(assert (conn-info))
(on-start
(react
(stop-when (asserted (ircd-motd $motd-lines))
(react
(begin/dataflow
(when (and (nick) (user))
(send* 375 (nick) #:trailing (format "- ~a Message of the day - " server-name))
(for [(line motd-lines)] (send* 372 (nick) #:trailing (format "- ~a" line)))
(send* 376 (nick) #:trailing (format "End of /MOTD command"))
(stop-current-facet)))))))
(field [peer-common-channels (hash)]
[peer-names (hash)])
(during (ircd-channel-member $Ch this-conn)
(field [initial-names-sent? #f]
[initial-member-nicks (set)])
(on-start (send* #:source (irc-source-nick (nick) (user)) "JOIN" Ch)
(flush!)
(flush!)
(define nicks (initial-member-nicks))
(initial-names-sent? #t)
(initial-member-nicks 'no-longer-valid)
(send* 353 (nick) "@" Ch #:trailing (string-join (set->list nicks)))
(send* 366 (nick) Ch #:trailing "End of /NAMES list"))
(during (ircd-channel-member Ch $other-conn)
(on-start (peer-common-channels (hashset-add (peer-common-channels) other-conn Ch)))
(on-stop (peer-common-channels (hashset-remove (peer-common-channels) other-conn Ch)))
(field [current-other-source #f])
(define/query-value next-other-source #f
(ircd-connection-info other-conn $N $U)
(irc-source-nick N U))
(on (retracted (ircd-channel-member Ch other-conn))
(when (current-other-source) (send* #:source (current-other-source) "PART" Ch)))
(on-stop (when (not (hash-has-key? (peer-common-channels) other-conn))
(peer-names (hash-remove (peer-names) other-conn))))
(begin/dataflow
(when (not (equal? (current-other-source) (next-other-source)))
(if (not (next-other-source)) ;; other-conn is disconnecting
(when (hash-ref (peer-names) other-conn #f)
(send* #:source (current-other-source) "QUIT")
(peer-names (hash-remove (peer-names) other-conn)))
(begin
(cond
[(not (initial-names-sent?)) ;; still gathering data for 353/366 below
(initial-member-nicks (set-add (initial-member-nicks)
(irc-source-nick-nick (next-other-source))))]
[(not (current-other-source)) ;; other-conn is joining
(send* #:source (next-other-source) "JOIN" Ch)]
[else ;; it's a nick change
(when (not (equal? this-conn other-conn)) ;; avoid dups for our own connection
(when (not (equal? (next-other-source) (hash-ref (peer-names) other-conn #f)))
(send* #:source (current-other-source) "NICK"
(irc-source-nick-nick (next-other-source)))))])
(peer-names (hash-set (peer-names) other-conn (next-other-source)))))
(current-other-source (next-other-source)))))
(on (asserted (ircd-channel-topic Ch $topic))
(if topic
(send* 332 (nick) Ch #:trailing topic)
(send* 331 (nick) Ch #:trailing "No topic is set")))
(on (message (ircd-action this-conn (irc-message _ "WHO" (list Ch) _)))
(flush!) ;; Wait for responses to come in. GROSS and not in
;; general correct (e.g. in the presence of
;; pipelining)
(send! (ircd-event this-conn
(irc-message server-prefix 315 (list (nick) Ch) "End of WHO list."))))
(on (message (ircd-action $who (irc-message _ "WHO" (list Ch) _)))
(match-define (irc-user U H R) (user))
(send! (ircd-event who (irc-message server-prefix 352
(list (nick) Ch U H server-name (nick) "H")
(format "0 ~a" R)))))
(on (message (ircd-action $other-conn (irc-privmsg $source Ch $text)))
(when (not (equal? other-conn this-conn))
(send* #:source source "PRIVMSG" Ch #:trailing text))))
(on (message (ircd-event this-conn $m))
(send-irc-message m))
(on (message (ircd-action $other-conn (irc-privmsg $source (nick) $text)))
(when (not (equal? other-conn this-conn))
(send* #:source source "PRIVMSG" (nick) #:trailing text)))
(on (message (tcp-channel-line this-conn server-handle $bs))
(define m (parse-irc-message (bytes->string/utf-8 bs)))
(log-info "~a -> ~v" this-conn m)
(send! (ircd-action this-conn m))
(match m
[(irc-message _ "PING" _ _) (void)] ;; RFC says servers don't reply to PINGs
[(or (irc-message _ "NICK" (list N) _)
(irc-message _ "NICK" '() N)) ;; libpurple does this (!)
;; TODO: enforce syntactic restrictions on nick
(if (immediate-query [query-value #f (ircd-connection-info _ N _) #t])
(send* 433 N #:trailing "Nickname is already in use")
(begin (when (nick) (send* #:source (irc-source-nick (nick) (user)) "NICK" N))
(nick N)))]
[(irc-message _ "USER" (list U _Hostname _Servername) R)
;; TODO: enforce syntactic restrictions on parameters to USER
(define H (tcp-address-host this-conn))
(user (irc-user U H R))]
[(irc-message _ "QUIT" _ _) (stop-current-facet)]
[_
(when (and (nick) (user))
(match m
[(irc-message _ "JOIN" (cons Channels _MaybeKeys) _)
(for [(Ch (string-split Channels #px",+"))]
(assert! (ircd-channel-member Ch this-conn)))]
[(irc-message _ "PART" (list Channels) _)
(for [(Ch (string-split Channels #px",+"))]
(retract! (ircd-channel-member Ch this-conn)))]
[(irc-message _ "WHOIS" _ _)
(send* 318 (nick) #:trailing "End of /WHOIS list")] ;; TODO
[(irc-message _ "PRIVMSG" (list Targets) Text)
(for [(T (string-split Targets #px",+"))]
(send! (ircd-action this-conn
(irc-privmsg (irc-source-nick (nick) (user)) T Text))))]
[_ (void)]))])))
(spawn #:name 'ison-responder
(stop-when-reloaded)
(define/query-set nicks (ircd-connection-info _ $N _) N)
(on (message (ircd-action $conn (irc-message _ "ISON" $SomeNicks $MoreNicks)))
(define Nicks (append SomeNicks (string-split (or MoreNicks ""))))
(define (on? N) (set-member? (nicks) N))
(define Present (string-join (filter on? Nicks) " "))
(send! (ircd-event conn (irc-message server-prefix 303 '("*") Present)))))
(spawn #:name 'session-listener-factory
(stop-when-reloaded)
(during/spawn (ircd-listener $port)
#:name (ircd-listener port)
(on-start (log-info "Listening on port ~a." port))
(on-stop (log-info "No longer listening on port ~a." port))
(define server-handle (tcp-listener port))
(assert (advertise (observe (tcp-channel _ server-handle _))))
(during/spawn (advertise (tcp-channel $this-conn server-handle _))
#:name `(ircd-connection ,this-conn ,server-handle)
(assert (advertise (tcp-channel server-handle this-conn _)))
(ircd-connection-facet this-conn server-handle))))

5
examples/netstack/incremental-highlevel/Makefile
View File

@ -5,8 +5,3 @@ run:
clean:
find . -name compiled -type d | xargs rm -rf
rm -f cpingresp
cpingresp: cpingresp.c
$(CC) -o $@ $<
sudo setcap cap_net_raw+p+i+e $@

6
examples/netstack/incremental-highlevel/arp.rkt
View File

@ -1,4 +1,4 @@
#lang syndicate
#lang syndicate/actor
;; ARP protocol, http://tools.ietf.org/html/rfc826
;; Only does ARP-over-ethernet.
@ -29,8 +29,8 @@
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(define (spawn-arp-driver)
(spawn #:name 'arp-driver
(during/spawn (arp-interface $interface-name)
(actor #:name 'arp-driver
(during/actor (arp-interface $interface-name)
#:name (list 'arp-interface interface-name)
(assert (arp-interface-up interface-name))
(on-start (define hwaddr (lookup-ethernet-hwaddr interface-name))

219
examples/netstack/incremental-highlevel/cpingresp.c
View File

@ -1,219 +0,0 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <err.h>
#include <errno.h>
#include <unistd.h>
#include <ifaddrs.h>
#include <net/if.h>
#include <net/ethernet.h>
#include <arpa/inet.h> /* for htons */
#include <pthread.h>
#include <net/if_arp.h>
#include <netpacket/packet.h>
static int lookupInterfaceInfo(int sock, char const *interfaceName, int info, struct ifreq *ifr) {
strncpy(ifr->ifr_name, interfaceName, IFNAMSIZ);
if (ioctl(sock, info, ifr) < 0) {
perror("ioctl error while looking performing ioctl on interface");
fprintf(stderr, "(ioctl number 0x%08x, interface %s)\n", info, interfaceName);
return -1;
} else {
return 0;
}
}
static int bindToInterface(int sock, char const *interfaceName) {
struct ifreq ifr;
struct sockaddr_ll socketAddress;
if (lookupInterfaceInfo(sock, interfaceName, SIOCGIFINDEX, &ifr) < 0) {
return -1;
}
socketAddress.sll_family = AF_PACKET;
socketAddress.sll_protocol = htons(ETH_P_ALL);
socketAddress.sll_ifindex = ifr.ifr_ifindex;
if (bind(sock, (struct sockaddr *) &socketAddress, sizeof(socketAddress)) < 0) {
perror("Bind error");
return -1;
}
return 0;
}
static int openSocket(char const *interfaceName) {
int sock = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
if (sock < 0) {
perror("Socket error");
return -1;
}
if (bindToInterface(sock, interfaceName) == -1) {
return -1;
}
return sock;
}
/* hwaddr should be of length ETH_ALEN */
static int socket_hwaddr(int sock, char const *interfaceName, char *hwaddr) {
struct ifreq ifr;
if (lookupInterfaceInfo(sock, interfaceName, SIOCGIFHWADDR, &ifr) < 0) {
return -1;
}
if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
return -1;
}
memcpy(hwaddr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
return 0;
}
static void dump_row(long count, int numinrow, int *chs) {
int i;
printf("%08lX:", count - numinrow);
if (numinrow > 0) {
for (i = 0; i < numinrow; i++) {
if (i == 8)
printf(" :");
printf(" %02X", chs[i]);
}
for (i = numinrow; i < 16; i++) {
if (i == 8)
printf(" :");
printf(" ");
}
printf(" ");
for (i = 0; i < numinrow; i++) {
if (isprint(chs[i]))
printf("%c", chs[i]);
else
printf(".");
}
}
printf("\n");
}
static int rows_eq(int *a, int *b) {
int i;
for (i=0; i<16; i++)
if (a[i] != b[i])
return 0;
return 1;
}
void dump_buffer_to_stdout(void *buf_v, int len, int hexmode) {
unsigned char *buf = (unsigned char *) buf_v;
long count = 0;
int numinrow = 0;
int chs[16];
int oldchs[16];
int showed_dots = 0;
int i;
if (hexmode) {
for (i = 0; i < len; i++) {
int ch = buf[i];
if (numinrow == 16) {
int i;
if (rows_eq(oldchs, chs)) {
if (!showed_dots) {
showed_dots = 1;
printf(" .. .. .. .. .. .. .. .. : .. .. .. .. .. .. .. ..\n");
}
} else {
showed_dots = 0;
dump_row(count, numinrow, chs);
}
for (i=0; i<16; i++)
oldchs[i] = chs[i];
numinrow = 0;
}
count++;
chs[numinrow++] = ch;
}
dump_row(count, numinrow, chs);
if (numinrow != 0)
printf("%08lX:\n", count);
} else {
fwrite(buf, 1, len, stdout);
printf("\n");
fflush(NULL);
}
}
int main(int argc, char const *argv[]) {
int handle = openSocket("eth0");
uint8_t buf[65536];
while (1) {
ssize_t len = recv(handle, &buf[0], sizeof(buf), MSG_TRUNC);
if (len == -1) {
perror("recv");
break;
}
uint8_t *ipbuf = buf + 14;
uint32_t self_ip = 0x810a735e;
uint32_t remote_ip = ntohl(*(int *)(&ipbuf[12]));
uint32_t local_ip = ntohl(*(int *)(&ipbuf[16]));
if (local_ip == self_ip) {
printf("Got ping from %d.%d.%d.%d\n", ipbuf[12], ipbuf[13], ipbuf[14], ipbuf[15]);
if ((len >= 28) && (ipbuf[9] == 1) && (ipbuf[20] == 8)) {
ipbuf[20] = 0;
{
short *icmp_cksum = (short *) (&ipbuf[22]);
*icmp_cksum = htons(ntohs(*icmp_cksum) + 0x0800);
}
*(int *)(&ipbuf[12]) = htonl(local_ip);
*(int *)(&ipbuf[16]) = htonl(remote_ip);
{
uint8_t mac[6];
memcpy(mac, buf, 6);
memcpy(buf, buf+6, 6);
memcpy(buf+6, mac, 6);
}
{
ssize_t written = write(handle, buf, len);
if (written != len) {
perror("write");
break;
}
}
}
}
}
return 0;
}

21
examples/netstack/incremental-highlevel/demo-config.rkt
View File

@ -1,21 +1,20 @@
#lang syndicate
#lang syndicate/actor
;; Demonstration stack configuration for various hosts.
(require racket/match)
(require (only-in mzlib/os gethostname))
(require (only-in racket/string string-split))
(require "configuration.rkt")
(spawn
(actor
(match (gethostname)
["skip"
(assert (gateway-route (bytes 0 0 0 0) 0 (bytes 192 168 1 1) "en0"))
(assert (host-route (bytes 192 168 1 222) 24 "en0"))]
[(or "hop" "walk")
(assert (gateway-route (bytes 0 0 0 0) 0 (bytes 192 168 1 1) "wlan0"))
(assert (host-route (bytes 192 168 1 222) 24 "wlan0"))]
["stockholm.ccs.neu.edu"
(assert (host-route (bytes 129 10 115 94) 24 "eth0"))
(assert (gateway-route (bytes 0 0 0 0) 0 (bytes 129 10 115 1) "eth0"))]
[other ;; assume a private network
(define interface
(match (car (string-split other "."))
["skip" "en0"]
["leap" "wlp4s0"] ;; wtf
[_ "wlan0"]))
(assert (gateway-route (bytes 0 0 0 0) 0 (bytes 192 168 1 1) interface))
(assert (host-route (bytes 192 168 1 222) 24 interface))]))
[other
(error 'demo-config "No setup for hostname ~a" other)]))

8
examples/netstack/incremental-highlevel/ethernet.rkt
View File

@ -1,4 +1,4 @@
#lang syndicate
#lang syndicate/actor
;; Ethernet driver
(provide (struct-out ethernet-packet)
@ -29,8 +29,8 @@
(log-info "Device names: ~a" interface-names)
(define (spawn-ethernet-driver)
(spawn #:name 'ethernet-driver
(during/spawn
(actor #:name 'ethernet-driver
(during/actor
(observe (ethernet-packet (ethernet-interface $interface-name _) #t _ _ _ _))
#:name (list 'ethernet-interface interface-name)
@ -46,7 +46,7 @@
(on-start (flush!) ;; ensure all subscriptions are in place
(async-channel-put control-ch 'unblock)
(spawn #:name (list 'ethernet-interface-quit-monitor interface-name)
(actor #:name (list 'ethernet-interface-quit-monitor interface-name)
(on (retracted interface)
(async-channel-put control-ch 'quit))))

2
examples/netstack/incremental-highlevel/fetchurl.rkt
View File

@ -1,4 +1,4 @@
#lang syndicate
#lang syndicate/actor
(require/activate syndicate/drivers/timer)
(require/activate "ethernet.rkt")

30
examples/netstack/incremental-highlevel/ip.rkt
View File

@ -1,4 +1,4 @@
#lang syndicate
#lang syndicate/actor
(provide (struct-out ip-packet)
ip-address->hostname
@ -57,15 +57,15 @@
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(define (spawn-ip-driver)
(spawn #:name 'ip-driver
(during/spawn (host-route $my-address $netmask $interface-name)
(actor #:name 'ip-driver
(during/actor (host-route $my-address $netmask $interface-name)
(assert (route-up (host-route my-address netmask interface-name)))
(do-host-route my-address netmask interface-name))
(during/spawn (gateway-route $network $netmask $gateway-addr $interface-name)
(during/actor (gateway-route $network $netmask $gateway-addr $interface-name)
(assert (route-up
(gateway-route $network $netmask $gateway-addr $interface-name)))
(do-gateway-route network netmask gateway-addr interface-name))
(during/spawn (net-route $network-addr $netmask $link)
(during/actor (net-route $network-addr $netmask $link)
(assert (route-up (net-route network-addr netmask link)))
(do-net-route network-addr netmask link))))
@ -176,22 +176,20 @@
(when (and (not (equal? (ip-packet-source-interface p) interface-name))
(ip-address-in-subnet? destination network netmask))
(define timer-id (gensym 'ippkt))
;; v Use `spawn` instead of `react` to avoid gratuitous packet
;; reordering.
(spawn (on-start (send! (set-timer timer-id 5000 'relative)))
(react (on-start (send! (set-timer timer-id 5000 'relative)))
(stop-when (message (timer-expired timer-id _))
(log-warning "ARP lookup of ~a failed, packet dropped"
(ip-address->hostname destination)))
(log-warning "ARP lookup of ~a failed, packet dropped"
(ip-address->hostname destination)))
(stop-when (asserted (arp-query IPv4-ethertype
destination
($ interface (ethernet-interface interface-name _))
$destination-hwaddr))
(send! (ethernet-packet interface
#f
(ethernet-interface-hwaddr interface)
destination-hwaddr
IPv4-ethertype
(format-ip-packet p))))))))
(send! (ethernet-packet interface
#f
(ethernet-interface-hwaddr interface)
destination-hwaddr
IPv4-ethertype
(format-ip-packet p))))))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

66
examples/netstack/incremental-highlevel/main.rkt
View File

@ -1,4 +1,4 @@
#lang syndicate
#lang syndicate/actor
(require syndicate/protocol/advertise)
@ -19,7 +19,7 @@
(struct present (who) #:prefab)
(define (spawn-session them us)
(spawn (define (send-to-remote fmt . vs)
(actor (define (send-to-remote fmt . vs)
(send! (outbound (tcp-channel us them (string->bytes/utf-8 (apply format fmt vs))))))
(define (say who fmt . vs)
@ -41,51 +41,47 @@
(on (message (inbound (tcp-channel them us $bs)))
(send! (says user (string-trim (bytes->string/utf-8 bs)))))))
(define us (tcp-listener 5999))
(dataspace #:name 'chat-dataspace
(spawn #:name 'chat-server
(assert (outbound (advertise (observe (tcp-channel _ us _)))))
(on (asserted (inbound (advertise (tcp-channel $them us _))))
(spawn-session them us)))))
(define us (tcp-listener 5999))
(forever (assert (outbound (advertise (observe (tcp-channel _ us _)))))
(on (asserted (inbound (advertise (tcp-channel $them us _))))
(spawn-session them us)))))
(let ((dst (udp-listener 6667)))
(spawn #:name 'udp-echo-program
(actor #:name 'udp-echo-program
(on (message (udp-packet $src dst $body))
(log-info "Got packet from ~v: ~v" src body)
(send! (udp-packet dst src (string->bytes/utf-8 (format "You said: ~a" body)))))))
(let ()
(dataspace #:name 'webserver-dataspace
(spawn #:name 'webserver-counter
(actor #:name 'webserver-counter
(field [counter 0])
(on (message 'bump)
(send! `(counter ,(counter)))
(counter (+ (counter) 1))))
(define us (tcp-listener 80))
(spawn (assert (outbound (advertise (observe (tcp-channel _ us _)))))
(during/spawn (inbound (advertise (tcp-channel ($ them (tcp-address _ _)) us _)))
#:name (list 'webserver-session them)
(log-info "Got connection from ~v" them)
(assert (outbound (advertise (tcp-channel us them _))))
(on (message (inbound (tcp-channel them us _)))) ;; ignore input
(forever (define us (tcp-listener 80))
(assert (outbound (advertise (observe (tcp-channel _ us _)))))
(during/actor (inbound (advertise (tcp-channel ($ them (tcp-address _ _)) us _)))
#:name (list 'webserver-session them)
(log-info "Got connection from ~v" them)
(field [done? #f])
(stop-when (rising-edge (done?)))
(assert (outbound (advertise (tcp-channel us them _))))
(on (message (inbound (tcp-channel them us _)))) ;; ignore input
(on-start (send! 'bump))
(on (message `(counter ,$counter))
(define response
(string->bytes/utf-8
(format (string-append
"HTTP/1.0 200 OK\r\n"
"Content-Type: text/html\r\n"
"\r\n"
"<h1>Hello world from syndicate-netstack!</h1>\n"
"<p>This is running on syndicate's own\n"
"<a href='https://github.com/tonyg/syndicate/'>\n"
"TCP/IP stack</a>.</p>\n"
"<p>There have been ~a requests prior to this one.</p>\n")
counter)))
(send! (outbound (tcp-channel us them response)))
(for [(i 4)]
(define buf (make-bytes 1024 (+ #x30 i)))
(send! (outbound (tcp-channel us them buf))))
(stop-facet (current-facet-id)))))))
(on-start (send! 'bump))
(on (message `(counter ,$counter))
(define response
(string->bytes/utf-8
(format (string-append
"HTTP/1.0 200 OK\r\n\r\n"
"<h1>Hello world from syndicate-netstack!</h1>\n"
"<p>This is running on syndicate's own\n"
"<a href='https://github.com/tonyg/syndicate/'>\n"
"TCP/IP stack</a>.</p>\n"
"<p>There have been ~a requests prior to this one.</p>\n")
counter)))
(send! (outbound (tcp-channel us them response)))
(done? #t))))))

67
examples/netstack/incremental-highlevel/pingresp.rkt
View File

@ -1,67 +0,0 @@
#lang racket/base
;; Simple "ping" responder. Nightmarishly oversimplified. We want to
;; look at overheads excluding Syndicate. See also
;; http://dunkels.com/adam/twip.html
(require packet-socket)
(require "dump-bytes.rkt")
(define device-name (or (getenv "PINGRESP_DEVICE") "eth0"))
(define self-ip (integer-bytes->integer (bytes 129 10 115 94) #f #t))
(define handle (raw-interface-open device-name))
(unless handle (error 'pingresp "Couldn't open ~a" device-name))
(let loop ()
(define eth-buffer (raw-interface-read handle))
(define buffer (subbytes eth-buffer 14))
(when (>= (bytes-length buffer) 20) ;; enough space for local and remote IP addresses
(define local-ip (integer-bytes->integer buffer #f #t 16 20))
(define remote-ip (integer-bytes->integer buffer #f #t 12 16))
(when (= local-ip self-ip)
;; (printf "Got ping from ~v\n" (bytes->list (subbytes buffer 12 16)))
;; (flush-output)
;; (dump-bytes! eth-buffer)
;; (newline)
(when (and (>= (bytes-length buffer) 28) ;; IP + ICMP headers
(= (bytes-ref buffer 9) 1) ;; IP protocol
(= (bytes-ref buffer 20) 8) ;; ICMP ECHO
)
(bytes-set! buffer 20 0) ;; ICMP ECHO_REPLY
(integer->integer-bytes (bitwise-and #xffff
(+ #x0800
(integer-bytes->integer buffer #f #t 22 24)))
2 #f #t buffer 22) ;; "fix" checksum
(integer->integer-bytes local-ip 4 #f #t buffer 12)
(integer->integer-bytes remote-ip 4 #f #t buffer 16)
(define reply
(bytes-append (subbytes eth-buffer 6 12)
(subbytes eth-buffer 0 6)
(subbytes eth-buffer 12 14)
buffer))
;; (displayln "Reply:")
;; (dump-bytes! reply)
;; (newline)
(raw-interface-write handle reply))))
(loop))
(raw-interface-close handle)
;; short s[70];
;; int *l = s;
;; int t;
;;
;; read(0, s, 140);
;; if((s[4] & 65280) == 256 & s[10] == 8) {
;; s[10] = 0;
;; s[11] += 8;
;; t = l[4];
;; l[4] = l[3];
;; l[3] = t;
;; write(1, s, 140);
;; }

4
examples/netstack/incremental-highlevel/port-allocator.rkt
View File

@ -1,4 +1,4 @@
#lang syndicate
#lang syndicate/actor
;; UDP/TCP port allocator
(provide spawn-port-allocator
@ -13,7 +13,7 @@
(struct port-allocation-reply (reqid port) #:prefab)
(define (spawn-port-allocator allocator-type query-used-ports)
(spawn #:name (list 'port-allocator allocator-type)
(actor #:name (list 'port-allocator allocator-type)
(define local-ips (query-local-ip-addresses))
(define used-ports (query-used-ports))

586
examples/netstack/incremental-highlevel/tcp.rkt
View File

@ -1,4 +1,4 @@
#lang syndicate
#lang syndicate/actor
(provide (struct-out tcp-address)
(struct-out tcp-handle)
@ -13,14 +13,10 @@
(require "dump-bytes.rkt")
(require "checksum.rkt")
(require/activate syndicate/drivers/timestate)
(require/activate syndicate/drivers/timer)
(require "ip.rkt")
(require "port-allocator.rkt")
(module+ test (require rackunit))
(define-logger netstack/tcp)
;; tcp-address/tcp-address : "kernel" tcp connection state machines
;; tcp-handle/tcp-address : "user" outbound connections
;; tcp-listener/tcp-address : "user" inbound connections
@ -50,27 +46,14 @@
;; (tcp-port-allocation Number (U TcpHandle TcpListener))
(struct tcp-port-allocation (port handle) #:prefab)
(define (summarize-tcp-packet packet)
(format "(~a) ~a:~a -> ~a:~a (seq ~a, ack ~a, flags ~a, window ~a, payload ~a)"
(if (tcp-packet-from-wire? packet) "I" "O")
(ip-address->hostname (tcp-packet-source-ip packet))
(tcp-packet-source-port packet)
(ip-address->hostname (tcp-packet-destination-ip packet))
(tcp-packet-destination-port packet)
(tcp-packet-sequence-number packet)
(tcp-packet-ack-number packet)
(tcp-packet-flags packet)
(tcp-packet-window-size packet)
(bit-string-byte-count (tcp-packet-data packet))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; User-accessible driver startup
(define (spawn-tcp-driver)
(spawn-port-allocator 'tcp (lambda () (query-set tcp-ports (tcp-port-allocation $p _) p)))
(spawn-kernel-tcp-driver)
(spawn #:name 'tcp-inbound-driver
(during/spawn (advertise (observe (tcp-channel _ ($ server-addr (tcp-listener _)) _)))
(actor #:name 'tcp-inbound-driver
(during/actor (advertise (observe (tcp-channel _ ($ server-addr (tcp-listener _)) _)))
#:name (list 'tcp-listen server-addr)
(match-define (tcp-listener port) server-addr)
(assert (tcp-port-allocation port server-addr))
@ -78,7 +61,7 @@
($ local-addr (tcp-address _ port))
_)))
(spawn-relay server-addr remote-addr local-addr))))
(spawn #:name 'tcp-outbound-driver
(actor #:name 'tcp-outbound-driver
(define local-ips (query-local-ip-addresses))
(on (asserted (advertise (tcp-channel ($ local-addr (tcp-handle _))
($ remote-addr (tcp-address _ _))
@ -109,7 +92,7 @@
(define (spawn-relay local-user-addr remote-addr local-tcp-addr)
(define timer-name (list 'spawn-relay local-tcp-addr remote-addr))
(spawn #:name (list 'tcp-relay local-user-addr remote-addr local-tcp-addr)
(actor #:name (list 'tcp-relay local-user-addr remote-addr local-tcp-addr)
(assert (tcp-port-allocation (tcp-address-port local-tcp-addr) local-user-addr))
(assert (advertise (tcp-channel remote-addr local-user-addr _)))
(assert (advertise (tcp-channel local-tcp-addr remote-addr _)))
@ -117,9 +100,10 @@
(field [local-peer-present? #f]
[remote-peer-present? #f])
(on-timeout relay-peer-wait-time-msec
(when (not (and (local-peer-present?) (remote-peer-present?)))
(error 'spawn-relay "TCP relay process timed out waiting for peer")))
(on-start (send! (set-timer timer-name relay-peer-wait-time-msec 'relative)))
(on (message (timer-expired timer-name _))
(when (not (and (local-peer-present?) (remote-peer-present?)))
(error 'spawn-relay "TCP relay process timed out waiting for peer")))
(on (asserted (observe (tcp-channel remote-addr local-user-addr _)))
(local-peer-present? #t))
@ -141,7 +125,7 @@
(define PROTOCOL-TCP 6)
(define (spawn-kernel-tcp-driver)
(spawn #:name 'kernel-tcp-driver
(actor #:name 'kernel-tcp-driver
(define local-ips (query-local-ip-addresses))
(define active-state-vectors
@ -181,6 +165,16 @@
(define-syntax-rule (set-flags! v ...)
(begin (unless (zero? v) (set! flags (set-add flags 'v))) ...))
(set-flags! ns cwr ece urg ack psh rst syn fin)
(log-info "TCP ~a:~a -> ~a:~a (seq ~a, ack ~a, flags ~a, window ~a)"
(ip-address->hostname src-ip)
src-port
(ip-address->hostname dst-ip)
dst-port
sequence-number
ack-number
flags
window-size)
(when spawn-needed? (log-info " - spawn needed!"))
(bit-string-case rest
([ (opts :: binary bytes (- (* data-offset 4) 20))
(data :: binary) ]
@ -195,19 +189,18 @@
window-size
(bit-string->bytes opts)
(bit-string->bytes data))))
(log-netstack/tcp-debug "TCP ~a" (summarize-tcp-packet packet))
(when spawn-needed?
(log-netstack/tcp-debug " - spawn needed!")
(active-state-vectors (set-add (active-state-vectors) statevec))
(spawn-state-vector src-ip src-port dst-ip dst-port))
;; TODO: get packet to the new state-vector process somehow
(send! packet)))
(else #f))))
(else #f)))
(begin/dataflow
(log-netstack/tcp-debug "SCN yielded statevecs ~v and local-ips ~v"
(active-state-vectors)
(local-ips)))
(log-info "SCN yielded statevecs ~v and local-ips ~v"
(active-state-vectors)
(local-ips)))
(define (deliver-outbound-packet p)
(match-define (tcp-packet #f
@ -222,7 +215,15 @@
options
data)
p)
(log-netstack/tcp-debug "TCP ~a" (summarize-tcp-packet p))
(log-info "TCP ~a:~a -> ~a:~a (seq ~a, ack ~a, flags ~a, window ~a)"
(ip-address->hostname src-ip)
src-port
(ip-address->hostname dst-ip)
dst-port
sequence-number
ack-number
flags
window-size)
(define (flag-bit sym) (if (set-member? flags sym) 1 0))
(define payload (bit-string (src-port :: integer bytes 2)
(dst-port :: integer bytes 2)
@ -263,111 +264,16 @@
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Per-connection state vector process
;;---------------------------------------------------------------------------
;; From the RFC:
;;
;; Send Sequence Variables
;;
;; SND.UNA - send unacknowledged
;; SND.NXT - send next
;; SND.WND - send window
;; SND.UP - send urgent pointer
;; SND.WL1 - segment sequence number used for last window update
;; SND.WL2 - segment acknowledgment number used for last window
;; update
;; ISS - initial send sequence number
;;
;; Receive Sequence Variables
;;
;; RCV.NXT - receive next
;; RCV.WND - receive window
;; RCV.UP - receive urgent pointer
;; IRS - initial receive sequence number
;;
;; The following diagrams may help to relate some of these variables to
;; the sequence space.
;;
;; Send Sequence Space
;;
;; 1 2 3 4
;; ----------|----------|----------|----------
;; SND.UNA SND.NXT SND.UNA
;; +SND.WND
;;
;; 1 - old sequence numbers which have been acknowledged
;; 2 - sequence numbers of unacknowledged data
;; 3 - sequence numbers allowed for new data transmission
;; 4 - future sequence numbers which are not yet allowed
;;
;; Send Sequence Space
;;
;; Figure 4.
;;
;; The send window is the portion of the sequence space labeled 3 in
;; figure 4.
;;
;; Receive Sequence Space
;;
;; 1 2 3
;; ----------|----------|----------
;; RCV.NXT RCV.NXT
;; +RCV.WND
;;
;; 1 - old sequence numbers which have been acknowledged
;; 2 - sequence numbers allowed for new reception
;; 3 - future sequence numbers which are not yet allowed
;;
;; Receive Sequence Space
;;
;; Figure 5.
;;
;; The receive window is the portion of the sequence space labeled 2 in
;; figure 5.
;;
;; There are also some variables used frequently in the discussion that
;; take their values from the fields of the current segment.
;;
;; Current Segment Variables
;;
;; SEG.SEQ - segment sequence number
;; SEG.ACK - segment acknowledgment number
;; SEG.LEN - segment length
;; SEG.WND - segment window
;; SEG.UP - segment urgent pointer
;; SEG.PRC - segment precedence value
;;
;;---------------------------------------------------------------------------
(struct buffer (data ;; bit-string
seqn ;; names leftmost byte in data
window ;; counts bytes from leftmost byte in data
finished?) ;; boolean: true after FIN
#:transparent)
;; Regarding acks:
;;
;; - we send an ack number that is (buffer-seqn (inbound)) plus the
;; number of buffered bytes.
;;
;; - acks received allow us to advance (buffer-seqn (outbound)) (that
;; is, SND.UNA) to that point, discarding buffered data to do so.
;; Regarding windows:
;;
;; - (buffer-window (outbound)) is the size of the peer's receive
;; window. Do not allow more than this many bytes to be
;; unacknowledged on the wire.
;;
;; - (buffer-window (inbound)) is the size of our receive window. The
;; peer should not exceed this; we should ignore data received that
;; extends beyond this. Once we implement flow control locally
;; (ahem) we should move this around, but at present it is fixed.
;; TODO: Zero receive window probe when we have something to say.
(define (buffer-push b data)
(struct-copy buffer b [data (bit-string-append (buffer-data b) data)]))
(define transmit-check-interval-msec 2000)
(define inbound-buffer-limit 65535)
(define maximum-segment-size 536) ;; bytes
(define maximum-segment-lifetime-sec (* 2 60)) ;; two minutes; 2MSL is TIME-WAIT timeout
@ -384,97 +290,39 @@
(- larger smaller)))
(define (seq> a b)
(not (seq>= b a)))
(define (seq>= a b)
(< (seq- a b) #x80000000))
(define (seq-min a b) (if (seq> a b) b a))
(define (seq-max a b) (if (seq> a b) a b))
(module+ test
(check-equal? (seq+ 41724780 1) 41724781)
(check-equal? (seq+ 0 1) 1)
(check-equal? (seq+ #x80000000 1) #x80000001)
(check-equal? (seq+ #xffffffff 1) #x00000000)
(check-equal? (seq> 41724780 41724780) #f)
(check-equal? (seq> 41724781 41724780) #t)
(check-equal? (seq> 41724780 41724781) #f)
(check-equal? (seq> 0 0) #f)
(check-equal? (seq> 1 0) #t)
(check-equal? (seq> 0 1) #f)
(check-equal? (seq> #x80000000 #x80000000) #f)
(check-equal? (seq> #x80000001 #x80000000) #t)
(check-equal? (seq> #x80000000 #x80000001) #f)
(check-equal? (seq> #xffffffff #xffffffff) #f)
(check-equal? (seq> #x00000000 #xffffffff) #t)
(check-equal? (seq> #xffffffff #x00000000) #f)
(check-equal? (seq>= 41724780 41724780) #t)
(check-equal? (seq>= 41724781 41724780) #t)
(check-equal? (seq>= 41724780 41724781) #f)
(check-equal? (seq>= 0 0) #t)
(check-equal? (seq>= 1 0) #t)
(check-equal? (seq>= 0 1) #f)
(check-equal? (seq>= #x80000000 #x80000000) #t)
(check-equal? (seq>= #x80000001 #x80000000) #t)
(check-equal? (seq>= #x80000000 #x80000001) #f)
(check-equal? (seq>= #xffffffff #xffffffff) #t)
(check-equal? (seq>= #x00000000 #xffffffff) #t)
(check-equal? (seq>= #xffffffff #x00000000) #f))
(define (spawn-state-vector src-ip src-port dst-ip dst-port)
(define src (tcp-address (ip-address->hostname src-ip) src-port))
(define dst (tcp-address (ip-address->hostname dst-ip) dst-port))
(define (timer-name kind) (list 'tcp-timer kind src dst))
(spawn
(actor
#:name (list 'tcp-state-vector
(ip-address->hostname src-ip)
src-port
(ip-address->hostname dst-ip)
dst-port)
;; Spawn with initial assertions so we are guaranteed to be sent
;; the packet that led to our creation (in the case of an accepted
;; server connection), and so that we at the same moment gain
;; knowledge of whether we were created on a listening port:
#:assertions* (patch-added
(patch-seq (sub (tcp-packet #t src-ip src-port dst-ip dst-port ? ? ? ? ? ?))
(sub (observe (advertise (tcp-channel ? (tcp-listener dst-port) ?))))))
(define root-facet (current-facet-id))
(define initial-outbound-seqn
;; Yuck
(inexact->exact (truncate (* #x100000000 (random)))))
(field [outbound (buffer #"!" initial-outbound-seqn 0 #f)] ;; dummy data at SYN position
[send-next initial-outbound-seqn] ;; SND.NXT
[high-water-mark initial-outbound-seqn]
[inbound (buffer #"" #f inbound-buffer-limit #f)]
[transmission-needed? #f]
[syn-acked? #f]
[latest-peer-activity-time (current-inexact-milliseconds)]
;; ^ the most recent time we heard from our peer
[user-timeout-base-time (current-inexact-milliseconds)]
;; ^ when the index of the first outbound unacknowledged byte changed
[most-recent-time (current-inexact-milliseconds)]
;; ^ updated by timer expiry; a field, to trigger quit checks
[quit-because-reset? #f])
;; RFC 6298
[rtt-estimate #f] ;; milliseconds; "SRTT"
[rtt-mean-deviation #f] ;; milliseconds; "RTTVAR"
[retransmission-timeout 1000] ;; milliseconds
[retransmission-deadline #f]
[rtt-estimate-seqn-target #f]
[rtt-estimate-start-time #f]
)
(let ()
(local-require (submod syndicate/actor priorities))
(on-event #:priority *query-priority*
[_ (most-recent-time (current-inexact-milliseconds))]))
(define (next-expected-seqn)
(define b (inbound))
@ -485,6 +333,7 @@
(inbound (struct-copy buffer (inbound) [seqn seqn])))
(define (incorporate-segment! data)
;; (log-info "GOT INBOUND STUFF TO DELIVER ~v" data)
(when (not (buffer-finished? (inbound)))
(inbound (buffer-push (inbound) data))))
@ -500,263 +349,158 @@
;; (Setof Symbol) -> Void
(define (check-fin! flags)
(define b (inbound))
(when (not (buffer-finished? b))
(unless (bit-string-empty? (buffer-data b)) ;; assured by deliver-inbound-locally
(error 'check-fin "Nonempty inbound buffer"))
(when (set-member? flags 'fin)
(log-netstack/tcp-debug "Closing inbound stream.")
(inbound (struct-copy buffer b
[seqn (seq+ (buffer-seqn b) 1)] ;; reliable: count fin as a byte
[finished? #t]))
(transmission-needed? #t)))) ;; we must send an ack
;; -> Void
(define (arm-retransmission-timer!)
(log-netstack/tcp-debug "Arming retransmission timer (~a ms)" (retransmission-timeout))
(retransmission-deadline (+ (current-inexact-milliseconds) (retransmission-timeout))))
;; Timestamp -> Void
(define (start-rtt-estimate! now)
(define target (send-next))
(when (seq>= target (high-water-mark))
(log-netstack/tcp-debug "Starting RTT estimation; target seqn is ~a" target)
(rtt-estimate-start-time now)
(rtt-estimate-seqn-target target)))
;; -> Void
(define (reset-rtt-estimate!)
(rtt-estimate-start-time #f)
(rtt-estimate-seqn-target #f))
;; Timestamp -> Void
(define (finish-rtt-estimate! now)
(define rtt-measurement (- now (rtt-estimate-start-time)))
(reset-rtt-estimate!)
(log-netstack/tcp-debug "RTT measurement: ~a ms" rtt-measurement)
;; RFC 6298 Section 2.
(cond [(rtt-estimate) => ;; we have a previous estimate, RFC 6298 rule (2.3)
(lambda (prev-estimate)
(rtt-mean-deviation (+ (* 0.75 (rtt-mean-deviation))
(* 0.25 (abs (- rtt-measurement prev-estimate)))))
(rtt-estimate (+ (* 0.875 prev-estimate)
(* 0.125 rtt-measurement))))]
[else ;; no previous estimate, RFC 6298 rule (2.2) applies
(rtt-estimate rtt-measurement)
(rtt-mean-deviation (/ rtt-measurement 2))])
(default-retransmission-timeout!)
(log-netstack/tcp-debug "RTT measurement ~a ms; estimate ~a ms; mean deviation ~a ms; RTO ~a ms"
rtt-measurement
(rtt-estimate)
(rtt-mean-deviation)
(retransmission-timeout)))
(define (default-retransmission-timeout!)
(retransmission-timeout
(max 200 ;; RFC 6298 rule (2.4), but cribbing from Linux's 200ms minimum
(min 60000 ;; (2.5)
(+ (rtt-estimate) (* 4 (rtt-mean-deviation))))))) ;; (2.2), (2.3)
(unless (bit-string-empty? (buffer-data b)) ;; assured by deliver-inbound-locally
(error 'check-fin "Nonempty inbound buffer"))
(when (set-member? flags 'fin)
(log-info "Closing inbound stream.")
(inbound (struct-copy buffer b
[seqn (seq+ (buffer-seqn b) 1)] ;; reliable: count fin as a byte
[finished? #t]))))
;; Boolean SeqNum -> Void
(define (discard-acknowledged-outbound! ack? ackn)
(when ack?
(let* ((b (outbound))
(base (buffer-seqn b))
(ackn (seq-min ackn (high-water-mark)))
(ackn (seq-max ackn base))
(limit (seq+ (buffer-seqn b) (bit-string-byte-count (buffer-data b))))
(ackn (if (seq> ackn limit) limit ackn))
(ackn (if (seq> base ackn) base ackn))
(dist (seq- ackn base)))
(define remaining-data (bit-string-drop (buffer-data b) (* dist 8))) ;; bit offset!
(user-timeout-base-time (current-inexact-milliseconds))
(when (positive? dist)
(when (not (syn-acked?)) (syn-acked? #t))
(log-netstack/tcp-debug "******** ackn ~a; send-next ~a; high-water-mark ~a"
ackn
(send-next)
(high-water-mark))
(when (seq> ackn (send-next)) (send-next ackn))
(when (and (rtt-estimate-seqn-target) (seq>= ackn (rtt-estimate-seqn-target)))
(finish-rtt-estimate! (current-inexact-milliseconds)))
(define remaining-data (bit-string-drop (buffer-data b) (* dist 8))) ;; bit offset!
(outbound (struct-copy buffer b [data remaining-data] [seqn ackn]))
(default-retransmission-timeout!)
(log-netstack/tcp-debug "Positive distance moved by ack, RTO now ~a"
(retransmission-timeout))
(arm-retransmission-timer!)))))
(outbound (struct-copy buffer b [data remaining-data] [seqn ackn]))
(syn-acked? (or (syn-acked?) (positive? dist))))))
;; Nat -> Void
(define (update-outbound-window! peer-window)
(log-netstack/tcp-debug "Peer's receive-window is now ~a" peer-window)
(outbound (struct-copy buffer (outbound) [window peer-window])))
;; True iff there is no queued-up data waiting either for
;; transmission or (if transmitted already) for acknowledgement.
(define (all-output-acknowledged?)
(bit-string-empty? (buffer-data (outbound))))
;; (Option SeqNum) -> Void
(define (send-outbound! old-ackn)
(define b (outbound))
(define pending-byte-count (max 0 (- (bit-string-byte-count (buffer-data b))
(if (buffer-finished? b) 1 0))))
(define segment-size (min maximum-segment-size
(if (syn-acked?) (buffer-window b) 1)
;; ^ can only send SYN until SYN is acked
pending-byte-count))
(define segment-offset (if (syn-acked?) 0 1))
(define chunk0 (bit-string-take (buffer-data b) (* segment-size 8))) ;; bit offset!
(define chunk (bit-string-drop chunk0 (* segment-offset 8))) ;; bit offset!
(define ackn (next-expected-seqn))
(define flags (set))
(when ackn
(set! flags (set-add flags 'ack)))
(when (not (syn-acked?))
(set! flags (set-add flags 'syn)))
(when (and (buffer-finished? b)
(syn-acked?)
(= segment-size pending-byte-count)
(not (all-output-acknowledged?))) ;; TODO: reexamine. This looks fishy
(set! flags (set-add flags 'fin)))
(define window (min 65535 ;; limit of field width
(max 0 ;; can't be negative
(- (buffer-window (inbound))
(bit-string-byte-count (buffer-data (inbound)))))))
(unless (and (equal? ackn old-ackn)
(syn-acked?)
(not (set-member? flags 'fin))
(zero? (bit-string-byte-count chunk)))
(local-require racket/pretty)
(pretty-write `(send-outbound (old-ackn ,old-ackn)
(flags ,flags)))
(flush-output)
(send! (tcp-packet #f dst-ip dst-port src-ip src-port
(buffer-seqn b)
(or ackn 0)
flags
window
#""
chunk))))
(define (bump-peer-activity-time!)
(latest-peer-activity-time (current-inexact-milliseconds)))
;; Number -> Boolean
(define (heard-from-peer-within-msec? msec)
(<= (- (most-recent-time) (latest-peer-activity-time)) msec))
(define (user-timeout-expired?)
(and (not (all-output-acknowledged?))
(> (- (most-recent-time) (user-timeout-base-time))
user-timeout-msec)))
(define (send-set-transmit-check-timer!)
(send! (set-timer (timer-name 'transmit-check)
transmit-check-interval-msec
'relative)))
(define (reset! seqn ackn)
(log-warning "Sending RST from ~a:~a to ~a:~a"
(ip-address->hostname dst-ip)
dst-port
(ip-address->hostname src-ip)
src-port)
(quit-because-reset? #t)
(send! (tcp-packet #f dst-ip dst-port src-ip src-port
seqn
ackn
(set 'ack 'rst)
0
#""
#"")))
(define (close-outbound-stream!)
(define b (outbound))
(when (not (buffer-finished? b))
(outbound (struct-copy buffer (buffer-push b #"!") ;; dummy FIN byte
[finished? #t]))
(transmission-needed? #t))) ;; the FIN machinery is awkwardly
;; different from the usual
;; advance-based decision on
;; whether to send a packet or not
;; SeqNum Boolean Boolean Bytes -> TcpPacket
(define (build-outbound-packet seqn mention-syn? mention-fin? payload)
(define ackn (next-expected-seqn))
(define window (min 65535 ;; limit of field width
(max 0 ;; can't be negative
(- (buffer-window (inbound))
(bit-string-byte-count (buffer-data (inbound)))))))
(define flags (set))
(when ackn (set! flags (set-add flags 'ack)))
(when mention-syn? (set! flags (set-add flags 'syn)))
(when mention-fin? (set! flags (set-add flags 'fin)))
(tcp-packet #f dst-ip dst-port src-ip src-port
seqn
(or ackn 0)
flags
window
#""
payload))
(define (outbound-data-chunk offset length)
(bit-string-take (bit-string-drop (buffer-data (outbound)) (* offset 8)) (* length 8)))
;; Transmit acknowledgements and outbound data.
(begin/dataflow
(define in-flight-count (seq- (send-next) (buffer-seqn (outbound))))
(define-values (mention-syn? ;; whether to mention SYN
payload-size ;; how many bytes of payload data to include
mention-fin? ;; whether to mention FIN
advance) ;; how far to advance send-next
(if (syn-acked?)
(let* ((effective-window (max 0 (- (buffer-window (outbound)) in-flight-count)))
(stream-ended? (buffer-finished? (outbound)))
(max-advance (- (bit-string-byte-count (buffer-data (outbound))) in-flight-count))
(payload-size (min maximum-segment-size effective-window max-advance)))
(if (and stream-ended? ;; there's a FIN enqueued,
(positive? payload-size) ;; we aren't sending nothing at all,
(= payload-size max-advance)) ;; and our payload would cover the FIN
(values #f (- payload-size 1) #t payload-size)
(values #f payload-size #f payload-size)))
(cond [(= in-flight-count 0) (values #t 0 #f 1)]
[(= in-flight-count 1) (values #t 0 #f 0)]
[else (error 'send-outbound!
"Invalid state: send-next had advanced too far before SYN")])))
(when (and (or (next-expected-seqn) (local-peer-seen?))
;; ^ Talk only either if: we know the peer's seqn, or
;; we don't, but a local peer exists, which means
;; we're an outbound connection rather than a
;; listener.
(or (transmission-needed?)
(positive? advance))
;; ^ ... and we have something to say. Something to
;; ack, or something to send.
)
(define packet-seqn (if mention-syn? (buffer-seqn (outbound)) (send-next)))
(define packet (build-outbound-packet packet-seqn
mention-syn?
mention-fin?
(outbound-data-chunk in-flight-count payload-size)))
(when (positive? advance)
(define new-send-next (seq+ (send-next) advance))
(send-next new-send-next)
(when (seq> new-send-next (high-water-mark))
(high-water-mark new-send-next)))
(when (transmission-needed?)
(transmission-needed? #f))
;; (log-netstack/tcp-debug " sending ~v" packet)
(send! packet)
;; (if (> (random) 0.5)
;; (begin (log-netstack/tcp-debug "Send ~a" (summarize-tcp-packet packet))
;; (send! packet))
;; (log-netstack/tcp-debug "Drop ~a" (summarize-tcp-packet packet)))
(when (or mention-syn? mention-fin? (positive? advance))
(when (not (retransmission-deadline))
(arm-retransmission-timer!))
(when (not (rtt-estimate-start-time))
(start-rtt-estimate! (current-inexact-milliseconds))))))
(begin/dataflow
(when (and (retransmission-deadline) (all-output-acknowledged?))
(log-netstack/tcp-debug "All output acknowledged; disarming retransmission timer")
(retransmission-deadline #f)))
(on #:when (retransmission-deadline) (asserted (later-than (retransmission-deadline)))
(send-next (buffer-seqn (outbound)))
(log-netstack/tcp-debug "Retransmission deadline fired, RTO was ~a; reset to ~a"
(retransmission-timeout)
(send-next))
(update-outbound-window! maximum-segment-size) ;; temporary. Will reopen on next ack
(transmission-needed? #t)
(retransmission-deadline #f)
(reset-rtt-estimate!) ;; give up on current RTT estimation
(retransmission-timeout (min 64000 (* 2 (retransmission-timeout))))
(log-netstack/tcp-debug " RTO now ~a" (retransmission-timeout)))
(define (reset! seqn ackn)
(define reset-packet (tcp-packet #f dst-ip dst-port src-ip src-port
seqn
ackn
(set 'ack 'rst)
0
#""
#""))
(log-netstack/tcp-warning "Reset ~a" (summarize-tcp-packet reset-packet))
(stop-facet root-facet)
(send! reset-packet))
[finished? #t]))))
(assert #:when (and (syn-acked?) (not (buffer-finished? (inbound))))
(advertise (tcp-channel src dst _)))
(on-start (log-netstack/tcp-info "Starting state vector ~a-~a" src-port dst-port))
(on-stop (log-netstack/tcp-info "Stopping state vector ~a-~a" src-port dst-port))
(stop-when #:when (and (buffer-finished? (outbound))
(buffer-finished? (inbound))
(all-output-acknowledged?))
(asserted (later-than (+ (latest-peer-activity-time)
(* 2 1000 maximum-segment-lifetime-sec))))
(stop-when
(rising-edge
(and (buffer-finished? (outbound))
(buffer-finished? (inbound))
(all-output-acknowledged?)
(not (heard-from-peer-within-msec? (* 2 1000 maximum-segment-lifetime-sec)))))
;; Everything is cleanly shut down, and we just need to wait a while for unexpected
;; packets before we release the state vector.
)
(stop-when #:when (not (all-output-acknowledged?))
(asserted (later-than (+ (user-timeout-base-time) user-timeout-msec)))
(stop-when
(rising-edge (user-timeout-expired?))
;; We've been plaintively retransmitting for user-timeout-msec without hearing anything
;; back; this is a crude approximation of the real condition for TCP_USER_TIMEOUT, but
;; it will do for now? TODO
(log-netstack/tcp-warning "TCP_USER_TIMEOUT fired."))
(log-info "TCP_USER_TIMEOUT fired."))
(stop-when (rising-edge (quit-because-reset?)))
(define/query-value local-peer-seen? #f (observe (tcp-channel src dst _)) #t
#:on-remove (begin
(log-netstack/tcp-debug "Closing outbound stream.")
(close-outbound-stream!)))
(log-info "Closing outbound stream.")
(close-outbound-stream!)
(send-outbound! (buffer-seqn (inbound)))))
(define/query-value listener-listening?
#f
(observe (advertise (tcp-channel _ (tcp-listener dst-port) _)))
#t)
(define (trigger-ack!)
(transmission-needed? #t))
(on (message (tcp-packet #t src-ip src-port dst-ip dst-port
$seqn $ackn $flags $window $options $data))
(define old-ackn (buffer-seqn (inbound)))
(define expected (next-expected-seqn))
(define is-syn? (set-member? flags 'syn))
(define is-fin? (set-member? flags 'fin))
(cond
[(set-member? flags 'rst) (stop-facet root-facet)]
[(set-member? flags 'rst) (quit-because-reset? #t)]
[(and (not expected) ;; no syn yet
(or (not is-syn?) ;; and this isn't it
(and (not (listener-listening?)) ;; or it is, but no listener...
@ -769,28 +513,38 @@
(cond
[(not expected) ;; haven't seen syn yet, but we know this is it
(set-inbound-seqn! (seq+ seqn 1))
(incorporate-segment! data)
(trigger-ack!)]
(incorporate-segment! data)]
[(= expected seqn)
(incorporate-segment! data)
(when (positive? (bit-string-byte-count data)) (trigger-ack!))]
[else
(trigger-ack!)])
(incorporate-segment! data)]
[else (void)])
(deliver-inbound-locally!)
(check-fin! flags)
(discard-acknowledged-outbound! (set-member? flags 'ack) ackn)
(update-outbound-window! window)
(latest-peer-activity-time (current-inexact-milliseconds))]))
(send-outbound! old-ackn)
(bump-peer-activity-time!)]))
(on (message (tcp-channel dst src $bs))
;; (log-netstack/tcp-debug "GOT MORE STUFF TO DELIVER ~v" bs)
(define old-ackn (buffer-seqn (inbound)))
;; (log-info "GOT MORE STUFF TO DELIVER ~v" bs)
(when (all-output-acknowledged?)
;; Only move user-timeout-base-time if there wasn't
;; already some outstanding output.
(user-timeout-base-time (current-inexact-milliseconds)))
(outbound (buffer-push (outbound) bs)))))
(outbound (buffer-push (outbound) bs))
(send-outbound! old-ackn))
(on-start (send-set-transmit-check-timer!))
(on (message (timer-expired (timer-name 'transmit-check) _))
(define old-ackn (buffer-seqn (inbound)))
;; TODO: I am abusing this timer for multiple tasks. Notably, this is a (crude) means of
;; retransmitting outbound data as well as a means of checking for an expired
;; TCP_USER_TIMEOUT. A better design would have separate timers and a more fine-grained
;; approach.
(send-set-transmit-check-timer!)
(send-outbound! old-ackn))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

10
examples/netstack/incremental-highlevel/udp.rkt
View File

@ -1,4 +1,4 @@
#lang syndicate
#lang syndicate/actor
(provide (struct-out udp-remote-address)
(struct-out udp-handle)
@ -50,18 +50,18 @@
(define (spawn-udp-driver)
(spawn-port-allocator 'udp (lambda () (query-set udp-ports (udp-port-allocation $p _) p)))
(spawn-kernel-udp-driver)
(spawn #:name 'udp-driver
(actor #:name 'udp-driver
(on (asserted (observe (udp-packet _ ($ h (udp-listener _)) _)))
(spawn-udp-relay (udp-listener-port h) h))
(on (asserted (observe (udp-packet _ ($ h (udp-handle _)) _)))
(spawn #:name (list 'udp-transient h)
(actor #:name (list 'udp-transient h)
(on-start (spawn-udp-relay (allocate-port! 'udp) h))))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Relaying
(define (spawn-udp-relay local-port local-user-addr)
(spawn #:name (list 'udp-relay local-port local-user-addr)
(actor #:name (list 'udp-relay local-port local-user-addr)
(on-start (log-info "Spawning UDP relay ~v / ~v" local-port local-user-addr))
(define any-remote (udp-remote-address ? ?))
@ -97,7 +97,7 @@
(define PROTOCOL-UDP 17)
(define (spawn-kernel-udp-driver)
(spawn #:name 'kernel-udp-driver
(actor #:name 'kernel-udp-driver
(assert (advertise (ip-packet #f _ _ PROTOCOL-UDP _ _)))
(define local-ips (query-local-ip-addresses))

2
examples/netstack/monolithic-lowlevel/arp.rkt
View File

@ -215,7 +215,7 @@
(cache-key-address q)))))))
(list (set-wakeup-alarm)
(actor (lambda (e s)
(spawn (lambda (e s)
;; (log-info "ARP ~a ~a: ~v // ~v" interface-name (pretty-bytes hwaddr) e s)
(match e
[(scn g)

19
examples/netstack/monolithic-lowlevel/demo-config.rkt
View File

@ -4,23 +4,22 @@
(require racket/match)
(require syndicate/monolithic)
(require (only-in mzlib/os gethostname))
(require (only-in racket/string string-split))
(require "configuration.rkt")
(provide spawn-demo-config)
(define (spawn-demo-config)
(actor (lambda (e s) #f)
(spawn (lambda (e s) #f)
(void)
(match (gethostname)
["skip"
(scn/union (assertion (gateway-route (bytes 0 0 0 0) 0 (bytes 192 168 1 1) "en0"))
(assertion (host-route (bytes 192 168 1 222) 24 "en0")))]
[(or "hop" "walk")
(scn/union (assertion (gateway-route (bytes 0 0 0 0) 0 (bytes 192 168 1 1) "wlan0"))
(assertion (host-route (bytes 192 168 1 222) 24 "wlan0")))]
["stockholm.ccs.neu.edu"
(scn/union (assertion (host-route (bytes 129 10 115 94) 24 "eth0"))
(assertion (gateway-route (bytes 0 0 0 0) 0 (bytes 129 10 115 1) "eth0")))]
[other ;; assume a private network
(define interface
(match (car (string-split other "."))
["skip" "en0"]
["leap" "wlp4s0"] ;; wtf
[_ "wlan0"]))
(scn/union (assertion (gateway-route (bytes 0 0 0 0) 0 (bytes 192 168 1 1) interface))
(assertion (host-route (bytes 192 168 1 222) 24 interface)))])))
[else
(error 'spawn-demo-config "No setup for hostname ~a" (gethostname))])))

2
examples/netstack/monolithic-lowlevel/ethernet.rkt
View File

@ -47,7 +47,7 @@
(log-info "Opened interface ~a, yielding handle ~v" interface-name h)
(define control-ch (make-async-channel))
(thread (lambda () (interface-packet-read-loop interface h control-ch)))
(actor (lambda (e h)
(spawn (lambda (e h)
(match e
[(scn g)
(if (trie-empty? g)

6
examples/netstack/monolithic-lowlevel/ip.rkt
View File

@ -83,7 +83,7 @@
network-addr
netmask
interface-name))
(actor (lambda (e s)
(spawn (lambda (e s)
(match e
[(scn (? trie-empty?)) (quit)]
[(message (ip-packet _ peer-address _ _ _ body))
@ -143,7 +143,7 @@
(and (positive? msk)
(ip-address-in-subnet? addr net msk))))
(actor (lambda (e s)
(spawn (lambda (e s)
(match e
[(scn g)
(define host-ips+netmasks (trie-project/set #:take 2 g host-route-projector))
@ -202,7 +202,7 @@
;; Normal IP route
(define (spawn-normal-ip-route the-route network netmask interface-name)
(actor (lambda (e s)
(spawn (lambda (e s)
(match e
[(scn (? trie-empty?)) (quit)]
[(message (ethernet-packet _ _ _ _ _ body))

12
examples/netstack/monolithic-lowlevel/main.rkt
View File

@ -34,7 +34,7 @@
(define (say who fmt . vs)
(unless (equal? who user) (send-to-remote "~a ~a\n" who (apply format fmt vs))))
(list (send-to-remote "Welcome, ~a.\n" user)
(actor
(spawn
(lambda (e peers)
(match e
[(message (inbound (tcp-channel _ _ bs)))
@ -61,14 +61,14 @@
(advertisement (inbound (tcp-channel us them ?))) ;; we will write to remote client
))))
(dataspace-actor
(spawn-dataspace
(spawn-demand-matcher (inbound (advertise (tcp-channel (?!) (?! (tcp-listener 5999)) ?)))
(inbound (observe (tcp-channel (?!) (?! (tcp-listener 5999)) ?)))
spawn-session))
)
(let ()
(actor (lambda (e s)
(spawn (lambda (e s)
(match e
[(message (udp-packet src dst body))
(log-info "Got packet from ~v: ~v" src body)
@ -84,7 +84,7 @@
(define (spawn-session them us)
(list
(message 'bump)
(actor (lambda (e s)
(spawn (lambda (e s)
(match e
[(message `(counter ,counter))
(define response
@ -105,8 +105,8 @@
(subscription (inbound (advertise (tcp-channel them us ?))))
(advertisement (inbound (tcp-channel us them ?)))))))
(dataspace-actor
(actor (lambda (e counter)
(spawn-dataspace
(spawn (lambda (e counter)
(match e
[(message 'bump)
(transition (+ counter 1) (message `(counter ,counter)))]

14
examples/netstack/monolithic-lowlevel/on-claim.rkt
View File

@ -10,14 +10,14 @@
;; -> Action
;; Spawns a process that observes the given projections. Any time the
;; environment's interests change in a relevant way, calls
;; check-and-maybe-actor-fn with the aggregate interests and the
;; projection results. If check-and-maybe-actor-fn returns #f,
;; check-and-maybe-spawn-fn with the aggregate interests and the
;; projection results. If check-and-maybe-spawn-fn returns #f,
;; continues to wait; otherwise, takes the action(s) returned, and
;; quits.
(define (on-claim #:timeout-msec [timeout-msec #f]
#:on-timeout [timeout-handler (lambda () '())]
#:name [name #f]
check-and-maybe-actor-fn
check-and-maybe-spawn-fn
base-interests
. projections)
(define timer-id (gensym 'on-claim))
@ -27,18 +27,18 @@
(define projection-results
(map (lambda (p) (trie-project/set #:take (projection-arity p) new-aggregate p))
projections))
(define maybe-actor (apply check-and-maybe-actor-fn
(define maybe-spawn (apply check-and-maybe-spawn-fn
new-aggregate
projection-results))
(if maybe-actor
(quit maybe-actor)
(if maybe-spawn
(quit maybe-spawn)
#f)]
[(message (timer-expired (== timer-id) _))
(quit (timeout-handler))]
[_ #f]))
(list
(when timeout-msec (message (set-timer timer-id timeout-msec 'relative)))
(actor #:name name
(spawn #:name name
on-claim-handler
(void)
(scn/union base-interests

2
examples/netstack/monolithic-lowlevel/port-allocator.rkt
View File

@ -14,7 +14,7 @@
(struct port-allocator-state (used-ports local-ips) #:transparent)
(define (spawn-port-allocator allocator-type observer-gestalt compute-used-ports)
(actor #:name (string->symbol (format "port-allocator:~a" allocator-type))
(spawn #:name (string->symbol (format "port-allocator:~a" allocator-type))
(lambda (e s)
(match e
[(scn g)

8
examples/netstack/monolithic-lowlevel/tcp.rkt
View File

@ -59,7 +59,7 @@
(match-define (tcp-listener port) server-addr)
;; TODO: have listener shut down once user-level listener does
(list
(actor #:name (string->symbol
(spawn #:name (string->symbol
(format "tcp-listener-port-reservation:~a" port))
(lambda (e s) #f)
(void)
@ -122,7 +122,7 @@
(define remote-peer-traffic (?! (advertise (tcp-channel remote-addr local-tcp-addr ?))))
(list
(message (set-timer timer-name relay-peer-wait-time-msec 'relative))
(actor #:name (string->symbol (format "tcp-relay:~v:~v:~v"
(spawn #:name (string->symbol (format "tcp-relay:~v:~v:~v"
local-user-addr
remote-addr
local-tcp-addr))
@ -294,7 +294,7 @@
(transition s (message (ip-packet #f src-ip dst-ip PROTOCOL-TCP #""
(ip-checksum 16 payload #:pseudo-header pseudo-header)))))
(actor #:name 'kernel-tcp-driver
(spawn #:name 'kernel-tcp-driver
(lambda (e s)
(match e
[(scn g)
@ -655,7 +655,7 @@
(current-inexact-milliseconds)
#f
#f)))
(actor #:name
(spawn #:name
(string->symbol (format "tcp-state-vector:~a:~a:~a:~a"
(ip-address->hostname src-ip)
src-port

4
examples/netstack/monolithic-lowlevel/udp.rkt
View File

@ -92,7 +92,7 @@
(subscription (udp-datagram ? ? ip local-port ?))
(advertisement (udp-datagram ip local-port ? ? ?)))))
(actor (lambda (e local-ips)
(spawn (lambda (e local-ips)
(match e
[(scn g)
(define new-local-ips (gestalt->local-ip-addresses g))
@ -124,7 +124,7 @@
(define PROTOCOL-UDP 17)
(define (spawn-kernel-udp-driver)
(actor (lambda (e local-ips)
(spawn (lambda (e local-ips)
(match e
[(scn g)
(transition (gestalt->local-ip-addresses g) '())]

10
examples/operational-transformation/syndicate-multiserver.rkt
View File

@ -1,4 +1,4 @@
#lang syndicate
#lang syndicate/actor
(require racket/file)
(require racket/serialize)
@ -18,11 +18,11 @@
(define cmdline-port (make-parameter 5889))
(define cmdline-filenames (make-parameter '()))
(spawn* (for [(filename (cmdline-filenames))]
(actor* (for [(filename (cmdline-filenames))]
(run-one-server filename)))
(define (run-one-server filename)
(spawn (field [state (make-server (simple-document
(actor (field [state (make-server (simple-document
(if (file-exists? filename)
(begin (log-info "loading ~v" filename)
(file->string filename))
@ -51,10 +51,10 @@
(define sp (extract-operation (state)))
(when sp (send! (accepted-op filename sp))))))
(spawn (define s (tcp-listener (cmdline-port)))
(actor (define s (tcp-listener (cmdline-port)))
(on-start (log-info "listening on port ~v" (cmdline-port)))
(assert (advertise (observe (tcp-channel _ s _))))
(during/spawn (advertise (tcp-channel $c s _))
(during/actor (advertise (tcp-channel $c s _))
(assert (advertise (tcp-channel s c _)))
(on-start (log-info "~a: connected" c))
(on-stop (log-info "~a: disconnected" c))

8
examples/operational-transformation/syndicate-server.rkt
View File

@ -1,4 +1,4 @@
#lang syndicate
#lang syndicate/actor
(require racket/file)
(require racket/serialize)
@ -16,7 +16,7 @@
(define cmdline-port (make-parameter 5888))
(define cmdline-filename (make-parameter "info.rkt"))
(spawn (field [state (make-server (simple-document
(actor (field [state (make-server (simple-document
(if (file-exists? (cmdline-filename))
(begin (log-info "loading ~v" (cmdline-filename))
(file->string (cmdline-filename)))
@ -45,10 +45,10 @@
(define sp (extract-operation (state)))
(when sp (send! (accepted-op sp)))))
(spawn (define s (tcp-listener (cmdline-port)))
(actor (define s (tcp-listener (cmdline-port)))
(on-start (log-info "listening on port ~v" (cmdline-port)))
(assert (advertise (observe (tcp-channel _ s _))))
(during/spawn (advertise (tcp-channel $c s _))
(during/actor (advertise (tcp-channel $c s _))
(assert (advertise (tcp-channel s c _)))
(on-start (log-info "~a: connected" c))
(on-stop (log-info "~a: disconnected" c))

55
examples/platformer/hll-main.rkt
View File

@ -1,4 +1,4 @@
#lang syndicate
#lang syndicate/actor
(require 2htdp/image)
(require 2htdp/planetcute)
@ -302,7 +302,7 @@
;; SceneManager
(define (spawn-scene-manager)
(spawn #:name 'scene-manager
(actor #:name 'scene-manager
(define backdrop (rectangle 1 1 "solid" "white"))
(define/query-value size (vector 0 0) (inbound (window $x $y)) (vector x y))
@ -337,7 +337,7 @@
;; ScoreKeeper
(define (spawn-score-keeper)
(spawn #:name 'score-keeper
(actor #:name 'score-keeper
(field [score 0])
(assert (current-score (score)))
(assert (outbound
@ -356,7 +356,7 @@
(define gravity 0.004)
(define (spawn-physics-engine)
(spawn #:name 'physics-engine
(actor #:name 'physics-engine
(field [configs (hash)]
[previous-positions (hash)]
[previous-velocities (hash)]
@ -535,7 +535,7 @@
(define planetcute-scale 1/2)
(define (spawn-player-avatar initial-focus-x initial-focus-y)
(spawn #:name 'player-avatar
(actor #:name 'player-avatar
(define i (icon character-cat-girl planetcute-scale 2/6 3/10 13/16))
(define initial-top-left (focus->top-left i initial-focus-x initial-focus-y))
@ -550,7 +550,7 @@
(field [hit-points 1])
(assert (health player-id (hit-points)))
(stop-when-true (<= (hit-points) 0))
(stop-when (rising-edge (<= (hit-points) 0)))
(on (message (damage player-id $amount))
(hit-points (- (hit-points) amount)))
@ -567,7 +567,7 @@
;; Ground Block
(define (spawn-ground-block top-left size #:color [color "purple"])
(spawn #:name (list 'ground-block top-left size color)
(actor #:name (list 'ground-block top-left size color)
(match-define (vector x y) top-left)
(match-define (vector w h) size)
(define block-id (gensym 'ground-block))
@ -589,7 +589,7 @@
(define i (icon key planetcute-scale 1/3 2/5 4/5))
(define initial-top-left (focus->top-left i initial-focus-x initial-focus-y))
(spawn #:name (list 'goal-piece initial-focus-x initial-focus-y)
(actor #:name (list 'goal-piece initial-focus-x initial-focus-y)
(on (asserted (touching player-id goal-id _))
(send! (outbound (level-completed))))
(assert (game-piece-configuration goal-id
@ -604,7 +604,7 @@
(define (spawn-enemy initial-x initial-y range-lo range-hi
#:speed [speed 0.2]
#:facing [initial-facing 'right])
(spawn #:name (list 'enemy initial-x initial-y initial-facing)
(actor #:name (list 'enemy initial-x initial-y initial-facing)
(define enemy-id (gensym 'enemy))
(define i (icon enemy-bug planetcute-scale 9/10 1/3 5/6))
(define i-flipped (struct-copy icon i [pict (flip-horizontal (icon-pict i))]))
@ -624,9 +624,9 @@
[(> (+ left width) range-hi) 'left]
[else (facing)]))))
(stop-when-true (and (current-level-size)
(> (vector-ref (pos) 1)
(vector-ref (current-level-size) 1))))
(stop-when (rising-edge (and (current-level-size)
(> (vector-ref (pos) 1)
(vector-ref (current-level-size) 1)))))
(field [facing initial-facing])
(assert (outbound* game-level
@ -647,7 +647,7 @@
(define (spawn-display-controller level-size-vec)
(match-define (vector level-width level-height) level-size-vec)
(spawn #:name 'display-controller
(actor #:name 'display-controller
(field [offset-pos (vector 0 0)])
(assert (outbound* 2 (scroll-offset (offset-pos))))
(assert (level-size level-size-vec))
@ -671,23 +671,23 @@
;; kills the dataspace.
(define (wait-for-level-termination)
(spawn
(assert (outbound (level-running)))
(on (retracted (game-piece-configuration player-id _ _ _))
(log-info "Player died! Terminating level.")
(play-sound-sequence 270328)
(quit-dataspace!))
(on (message (inbound (level-completed)))
(log-info "Level completed! Terminating level.")
(play-sound-sequence 270330)
(send! (outbound (add-to-score 100)))
(quit-dataspace!))))
(react/suspend (done)
(assert (outbound (level-running)))
(stop-when (retracted (game-piece-configuration player-id _ _ _))
(log-info "Player died! Terminating level.")
(play-sound-sequence 270328)
(done))
(stop-when (message (inbound (level-completed)))
(log-info "Level completed! Terminating level.")
(play-sound-sequence 270330)
(send! (outbound (add-to-score 100)))
(done))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; LevelSpawner
(define (spawn-standalone-assertions . patches)
(spawn #:name 'standalone-assertions
(actor #:name 'standalone-assertions
(on-start (patch! (patch-seq* patches)))))
(define (spawn-background-image level-size scene)
@ -778,7 +778,7 @@
message))))))
(define (spawn-level-spawner starting-level)
(spawn #:name 'level-spawner
(actor #:name 'level-spawner
(field [current-level starting-level]
[level-complete? #f])
@ -816,4 +816,5 @@
(spawn-keyboard-integrator)
(spawn-scene-manager)
(dataspace (spawn-score-keeper)
(spawn-level-spawner 0))
(spawn-level-spawner 0)
(forever))

26
examples/platformer/lll-main.rkt
View File

@ -335,7 +335,7 @@
p
(?! (on-screen-display ? ? ?)))]))
(actor (lambda (e s)
(spawn (lambda (e s)
(match e
[(? patch? p)
(let* ((s (update-window-size s p))
@ -381,7 +381,7 @@
(define i (text (format "Score: ~a" new-score) 24 "white"))
(patch-seq (retract (outbound (on-screen-display ? ? ?)))
(assert (outbound (on-screen-display -150 10 (seal i))))))
(actor (lambda (e s)
(spawn (lambda (e s)
(match e
[(message (add-to-score delta))
(define new-score (+ s delta))
@ -603,7 +603,7 @@
(play-sound-sequence 270318)
((update-piece g pos (v+ pos (vector 0 -1)) jump-vel) s)))
(actor (lambda (e s)
(spawn (lambda (e s)
(match e
[(? patch? p)
(sequence-transitions (transition s '())
@ -679,7 +679,7 @@
(patch-seq (retract (impulse player-id ?))
(assert (impulse player-id (vector h-impulse 0)))))))
(actor (lambda (e s)
(spawn (lambda (e s)
(match e
[(? patch? p)
(sequence-transitions (transition s '())
@ -720,7 +720,7 @@
(match-define (vector w h) size)
(define block-id (gensym 'ground-block))
(define block-pict (rectangle w h "solid" color))
(actor (lambda (e s)
(spawn (lambda (e s)
(match e
[_ #f]))
(void)
@ -742,7 +742,7 @@
(define i (icon key planetcute-scale 1/3 2/5 4/5))
(define initial-top-left (focus->top-left i initial-focus-x initial-focus-y))
(actor (lambda (e s)
(spawn (lambda (e s)
(match e
[(? patch/added?) (transition s (message (outbound (level-completed))))]
[_ #f]))
@ -824,7 +824,7 @@
(quit (list damage-actions (message (outbound (add-to-score 1))))))
(transition s damage-actions)))
(actor (lambda (e s)
(spawn (lambda (e s)
(match e
[(? patch? p)
(sequence-transitions (transition s '())
@ -874,7 +874,7 @@
(patch-seq (retract (outbound* 2 (scroll-offset ?)))
(assert (outbound* 2 (scroll-offset offset-pos))))))))))
(actor (lambda (e s)
(spawn (lambda (e s)
(match e
[(? patch? p)
(sequence-transitions (transition s '())
@ -893,7 +893,7 @@
;; kills the dataspace.
(define (spawn-level-termination-monitor)
(actor (lambda (e s)
(spawn (lambda (e s)
(match e
[(? patch/removed?)
(log-info "Player died! Terminating level.")
@ -914,7 +914,7 @@
;; LevelSpawner
(define (spawn-standalone-assertions . patches)
(actor (lambda (e s) #f)
(spawn (lambda (e s) #f)
(void)
patches))
@ -942,7 +942,7 @@
#:level-size [level-size-vec (vector 4000 2000)]
#:scene [scene grassland-backdrop]
. actions)
(dataspace-actor
(spawn-dataspace
(and scene (spawn-background-image level-size-vec scene))
(spawn-display-controller level-size-vec)
(spawn-physics-engine)
@ -1005,7 +1005,7 @@
(define (spawn-level-spawner starting-level)
(struct level-spawner-state (current-level level-complete?) #:prefab)
(list (actor (lambda (e s)
(list (spawn (lambda (e s)
(match-define (level-spawner-state current-level level-complete?) s)
(match e
[(? patch/removed?)
@ -1045,5 +1045,5 @@
((2d-dataspace #:width 600 #:height 400)
(spawn-keyboard-integrator)
(spawn-scene-manager)
(dataspace-actor (spawn-score-keeper)
(spawn-dataspace (spawn-score-keeper)
(spawn-level-spawner 0)))

38
examples/webchat/NOTES.md
View File

@ -1,38 +0,0 @@
## Sorting out contact states
### Design
Contacts are symmetric: If A follows B, then B follows A.
Let's look at how the state of the A/B relationship changes:
- Initial state: neither A nor B follows the other.
- ACTION: A adds B to their contacts
- A proposes an A/B link.
- ACTION: A may cancel the proposition
- Return to initial state.
- ACTION: B may approve the proposition
- A/B link established.
- ACTION: B may reject the proposition
- Return to initial state.
- ACTION: B may ignore the proposition
- B's user interface no longer displays the request,
but if B subsequently proposes an A/B link, it is
as if B approved the previously-proposed link.
- From "A/B link established":
- ACTION: A may cancel the link
- Return to initial state.
- ACTION: B may cancel the link
- Return to initial state.
B should appear in A's contact list in any of these cases:
1. A has proposed an A/B link.
2. An A/B link exists.
In the first case, B should appear as a "pending link request": as
offline, with a "cancel link request" action available.
In the second case, B should appear as fully linked, either offline or
online, with a "delete contact" action available.

49
examples/webchat/htdocs/Text-x-generic.svg
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@ -1,49 +0,0 @@
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template {
display: none !important;
}
img.avatar {
border-radius: 24px;
}
/* --------------------------------------------------------------------------- */
.main-container {
display: flex;
height: 100vh;
flex-direction: column;
}
#main-div {
flex: 1;
overflow: auto;
}
.column-container {
display: flex;
flex-direction: column;
}
.column-fill {
flex: 1;
overflow: auto;
}
/* --------------------------------------------------------------------------- */
.alert-count {
background: red;
color: white;
padding: 0em 0.25em;
border-radius: 4px;
}
.hide-zero-count.count0 {
display: none;
}
.show-only-zero-count {
display: none;
}
.show-only-zero-count.count0 {
display: inherit;
}
.plural.count1 {
display: none;
}
.contact-list-present-false {
opacity: 0.3;
}
.align-right { text-align: right; }
.align-center { text-align: center; }
.cursor-interactive {
cursor: pointer;
}
.dropdown-marginal {
left: -1.1em;
display: inline-block;
width: 0px;
position: relative;
}
.forcewrap {
word-wrap: break-word !important;
xhyphens: auto;
}
.big-icon {
font-size: 1.75rem;
}
.invited-tick {
font-size: 2rem;
width: 48px;
height: 48px;
display: inline-block;
border-radius: 24px;
color: white;
background: darkgreen;
text-align: center;
line-height: 0px;
}
.invited-tick .icon {
position: relative;
top: 0.5rem;
}
.blurb-box {
}
.float-right { float: right; }
.main-container footer {
padding-top: 1rem;
text-align: right;
}
/* --------------------------------------------------------------------------- */
.conversation-control-panel {
font-size: 2rem;
}
.post-backdrop {
overflow-y: scroll;
}
.post {
margin: 20px;
}
.post .post-body {
background: white;
border: solid #d3d3d3 1px;
border-radius: 1.5rem;
padding: 1rem;
margin: 0 0px;
min-height: 60px;
}
.post p {
margin-bottom: 0;
}
.post.from-me .post-body {
background: #e8e8ff;
margin-left: 4rem;
margin-right: -1px;
}
.post.to-me .post-body {
margin-left: -1px;
margin-right: 4rem;
}
.post.from-me:after {
content: url('/speechbubble-r.png');
position: relative;
/* left: 100%; */
right: -100%;
top: -40px;
height: 0px;
width: 0px;
display: block;
}
.post.to-me:after {
content: url('/speechbubble-l.png');
position: relative;
left: -16px;
top: -40px;
height: 0px;
width: 0px;
display: block;
}
.post-date {
float: right;
height: 0.25em;
display: block;
font-size: 0.75rem;
padding-right: 0.5em;
}
.post-author {
/* font-weight: bold; */
font-size: 0.75rem;
position: relative;
top: -0.75em;
height: 0.75em;
}
.post-item {
}
.post-item-draft {
/* background: #e8e8ff; */
background: white;
border: solid #d3d3d3 1px;
border-radius: 1.5rem;
padding: 1rem;
margin: 1rem 0 0 0;
}
.post-item-draft .close-draft {
float: right;
}
.post-item-image {
max-width: 100%;
max-height: 50vh;
}
.post-item-draft .post-item-image {
max-width: 80%;
max-height: 30vh;
}
.post-item .post-item-body-container table.application-octet-stream td {
text-align: center;
}

22
examples/webchat/htdocs/templates/contact-entry.html
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<div class="col-xs-12 col-md-6 col-lg-4 p-1 dropdown">
<div class="cursor-interactive contact-list-present-{{isPresent}} dropdown-toggle" data-toggle="dropdown">
<img class="avatar" src="{{avatar}}">
<span class="forcewrap">{{email}}</span>
{{#pendingContactRequest}}(pending){{/pendingContactRequest}}
</div>
<div class="dropdown-menu pt-0 w-100">
<img src="{{avatar}}&s=512" class="w-100">
<div class="my-1 mx-2">
<h3 class="forcewrap">{{email}}</h3>
<!-- <p> -->
<!-- It is a long established fact that a reader will be distracted -->
<!-- by the readable content of a page when looking at its layout. -->
<!-- </p> -->
<!-- <hr> -->
<!-- <p>Rest of text.</p> -->
</div>
<div class="dropdown-divider"></div>
{{#pendingContactRequest}}<button class="dropdown-item delete-contact"><i class="dropdown-marginal icon ion-help"></i>Cancel pending contact request</button>{{/pendingContactRequest}}
{{^pendingContactRequest}}<button class="dropdown-item delete-contact"><i class="dropdown-marginal icon ion-trash-b"></i>Delete contact</button>{{/pendingContactRequest}}
</div>
</div>

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examples/webchat/htdocs/templates/conversation-index-entry.html
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<div class="card conversation-card">
<div class="card-block {{#isSelected}}bg-primary text-white{{/isSelected}}">
<div class="card-title">{{title}}{{^title}}<i>Untitled</i>{{/title}}</div>
{{#members}}
<img src="{{avatar}}">
{{/members}}
</div>
</div>

2
examples/webchat/htdocs/templates/grant-entry.html
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<li>{{issuer}} {{grantee}} {{permission}} {{isDelegable}}
<button class="revoke">Revoke</button></li>

7
examples/webchat/htdocs/templates/invitee-entry.html
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<div class="col-xs-12 col-md-6 col-lg-4 p-1">
<div class="cursor-interactive contact-list-present-{{isPresent}} toggle-invitee-status p-2 {{#isInvited}}bg-primary text-white{{/isInvited}} rounded">
{{#isInvited}}<span class="invited-tick"><i class="icon ion-checkmark"></i></span>{{/isInvited}}
{{^isInvited}}<img class="avatar" src="{{avatar}}">{{/isInvited}}
<span class="forcewrap">{{email}}</span>
</div>
</div>

24
examples/webchat/htdocs/templates/nav-account.html
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<li class="nav-item dropdown">
<span class="nav-link dropdown-toggle contact-list-present-{{globallyVisible}} cursor-interactive" data-toggle="dropdown" id="nav-account">
<img class="avatar" src="{{avatar}}">
<span class="alert-count hide-zero-count count{{questionCount}}">{{questionCount}}</span>
<span class="forcewrap">{{email}}</span></span>
<div class="dropdown-menu dropdown-menu-right" aria-labelledby="nav-account">
<button class="dropdown-item toggleInvisible"><i class="icon ion-checkmark dropdown-marginal" {{#locallyVisible}}hidden{{/locallyVisible}}></i>Be invisible</button>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#/conversations">Conversations</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#/permissions">Permissions...</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#/questions">
<span class="alert-count hide-zero-count count{{questionCount}}">{{questionCount}}</span>
Question<span class="plural count{{questionCount}}">s</span> waiting for your answer</a>
<a class="dropdown-item" href="#/my-requests">
<span class="normal-count hide-zero-count count{{myRequestCount}}">{{myRequestCount}}</span>
Request<span class="plural count{{myRequestCount}}">s</span> for others to answer</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#/contacts">Manage contacts</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="/logout">Log out</a>
</div>
</li>

11
examples/webchat/htdocs/templates/option-question.html
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<div class="card col-xs-12 col-lg-6 {{questionClass}}">
<div class="card-block">
<h4 class="card-title">{{title}}</h4>
{{&blurb}}
<div class="list-group">
{{#options}}
<button class="list-group-item list-group-item-action response" data-value="{{0}}">{{1}}</button>
{{/options}}
</div>
</div>
</div>

11
examples/webchat/htdocs/templates/page-contacts.html
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<h2>Add a new contact</h2>
<form class="form-inline">
<label for="add-contact-email">New contact email: </label>
<input class="form-control" id="add-contact-email" type="email">
<button class="btn btn-default" id="add-contact">Add contact</button>
</form>
<h2>Contact List</h2>
<div class="container">
<div class="contact-list" class="row"></div>
</div>

157
examples/webchat/htdocs/templates/page-conversations.html
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<div class="modal fade" id="invitation-modal" tabindex="-1" role="dialog" aria-hidden="true">
<div class="modal-dialog" role="document">
<form class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">&times;</span>
</button>
<h4 class="modal-title" id="myModalLabel">Invite User</h4>
</div>
<div class="modal-body">
<label for="invited-username">User to invite:</label>
<input type="email" class="form-control" id="invited-username" placeholder="username@example.com">
</div>
<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-dismiss="modal">Cancel</button>
<button class="btn btn-primary btn-default send-invitation">Invite</button>
</div>
</form>
</div>
</div>
<div class="container h-100">
<div class="row h-100">
{{#showConversationList}}
<div class="col-md-4 h-100 column-container">
<div id="conversation-list" class="column-fill">
</div>
<div class="align-center">
<a class="big-icon text-gray-dark" href="#/new-chat"><i class="cursor-interactive icon ion-plus-circled"></i></a>
</div>
</div>
{{/showConversationList}}
{{#showConversationMain}}
<div id="conversation-main" class="col-md-8 h-100 column-container">
{{#selected}}
<div class="column-fill post-backdrop {{^miniMode}}not-{{/miniMode}}mini-mode">
{{#miniMode}}
<div class="conversation-control-panel bg-primary text-white px-1 mb-1">
<div class="float-right dropdown">
<i class="cursor-interactive icon ion-more" data-toggle="dropdown"></i>
<div class="dropdown-menu dropdown-menu-right">
{{#overflowMenuItems}}
{{#separator}}
<div class="dropdown-divider"></div>
{{/separator}}
{{^separator}}
<button class="dropdown-item {{action}}">{{label}}</button>
{{/separator}}
{{/overflowMenuItems}}
</div>
</div>
<i class="toggle-info-mode float-right icon ion-information-circled pr-1"></i>
{{#showConversationInfo}}
<i class="end-info-mode icon ion-arrow-left-c" style="padding-right: 0.5rem"></i>
{{/showConversationInfo}}
{{^showConversationInfo}}
<a class="text-white" style="padding-right: 0.5rem" href="#/conversations"><i class="icon ion-arrow-left-c"></i></a>
{{/showConversationInfo}}
<span>{{title}}{{^title}}<i class="text-muted">Untitled</i>{{/title}}</span>
</div>
{{/miniMode}}
{{#showConversationInfo}}
<div>
<div class="float-right dropdown mr-1">
<i class="cursor-interactive big-icon icon ion-more" data-toggle="dropdown"></i>
<div class="dropdown-menu dropdown-menu-right">
{{#overflowMenuItems}}
{{^hidden}}
{{#separator}}
<div class="dropdown-divider"></div>
{{/separator}}
{{^separator}}
<button class="dropdown-item {{action}}">{{label}}</button>
{{/separator}}
{{/hidden}}
{{/overflowMenuItems}}
</div>
</div>
{{#editingTitle}}
<h2 class="mr-1">
<form class="form-inline">
<input type="text" autocomplete="off" class="form-control" id="conversation-title" value="{{title}}">
<button class="form-control btn btn-primary btn-default" id="accept-conversation-title"><i class="icon ion-checkmark"></i></button>
<button class="form-control btn btn-secondary" id="cancel-edit-conversation-title"><i class="icon ion-close"></i></button>
</form>
</h2>
{{/editingTitle}}
{{^editingTitle}}
<form class="form-inline float-right">
<button class="form-control btn" id="edit-conversation-title"><i class="icon ion-edit"></i></button>
</form>
<h2 id="title-heading">{{title}}{{^title}}<i class="text-muted">Untitled</i>{{/title}}</h2>
{{/editingTitle}}
<hr>
{{#editingBlurb}}
<div class="mr-1">
<textarea rows="3" class="form-control" id="conversation-blurb">{{blurb}}</textarea>
<form class="form-inline align-right pb-1">
<button class="form-control btn btn-primary btn-default" id="accept-conversation-blurb"><i class="icon ion-checkmark"></i></button>
<button class="form-control btn btn-secondary" id="cancel-edit-conversation-blurb"><i class="icon ion-close"></i></button>
</form>
</div>
{{/editingBlurb}}
{{^editingBlurb}}
<div>
<form class="form-inline float-right">
<button class="form-control btn" id="edit-conversation-blurb"><i class="icon ion-edit"></i></button>
</form>
<div id="blurb" class="blurb-box">
{{#blurb}}
<p>{{blurb}}</p>
{{/blurb}}
{{^blurb}}
<p><i class="text-muted">Set a conversation topic here</i></p>
{{/blurb}}
</div>
</div>
{{/editingBlurb}}
</div>
{{/showConversationInfo}}
{{#showConversationPosts}}
<div class="posts"></div>
{{/showConversationPosts}}
</div>
{{#showConversationPosts}}
<div id="pending-draft-items">
</div>
<form id="message-input-form" class="form-inline pt-1" style="display: flex;">
<input type="text" autocomplete="off" id="message-input" class="form-control" style="flex: 1">
<input type="file" style="display: none;" hidden id="attach-item-file">
<button type="button" id="attach-item-button" class="form-control btn btn-secondary" style="max-width: 3em; font-size: 120%;"><i class="icon ion-paperclip"></i></button>
<button type="submit" id="send-message-button" class="form-control btn btn-primary btn-default" style="max-width: 3em"><i class="icon ion-paper-airplane"></i></button>
</form>
{{/showConversationPosts}}
{{/selected}}
{{^selected}}
<p class="align-center">
Select a conversation from the column to the left,
or <a href="#/new-chat">create a new conversation</a>.
</p>
{{/selected}}
</div>
{{/showConversationMain}}
</div>
</div>
{{#miniMode}}
<style>
footer { display: none; }
#message-input-form { margin-bottom: 1rem; }
</style>
{{/miniMode}}

3
examples/webchat/htdocs/templates/page-my-requests.html
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<h2>Requests I have made</h2>
<p class="show-only-zero-count count{{myRequestCount}}">You have no outstanding requests waiting for responses from others.</p>
<ul id="my-permission-requests"></ul>

35
examples/webchat/htdocs/templates/page-new-chat.html
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@ -1,35 +0,0 @@
<h2>New Conversation</h2>
<hr>
<h4>Select people to add</h4>
<div class="input-group">
<input class="form-control"
type="search"
id="search-contacts"
placeholder="Search contacts"
value="{{searchString}}">
<div class="input-group-addon"><i class="icon ion-search"></i></div>
</div>
<div class="container">
<div class="contact-list" class="row"></div>
</div>
<hr>
<h4>Configure the conversation</h4>
<form>
<div class="form-group">
<label for="conversation-title">Conversation Title</label>
<input type="text" autocomplete="off" class="form-control" id="conversation-title">
</div>
<div class="form-group">
<label for="conversation-blurb">Conversation Description</label>
<textarea class="form-control" id="conversation-blurb" rows="3"></textarea>
</div>
<button type="submit" class="btn btn-success create-conversation {{#noInvitees}}disabled{{/noInvitees}}">Create conversation</button>
{{#noInvitees}}
<div class="alert alert-danger">
You must invite at least one person to the conversation.
</div>
{{/noInvitees}}
</form>

5
examples/webchat/htdocs/templates/page-permissions.html
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@ -1,5 +0,0 @@
<h2>Permissions I enjoy</h2>
<ul id="permissions"></ul>
<h2>Permissions I have granted to others</h2>
<ul id="grants"></ul>

23
examples/webchat/htdocs/templates/page-questions.html
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@ -1,23 +0,0 @@
<h2>Questions</h2>
<div class="show-only-zero-count count{{questionCount}}">
<p>There are no questions waiting for you to answer.</p>
<ul>
<li><a href="#/conversations">Go to conversation list.</a></li>
<li><a href="#/contacts">Go to contacts list.</a></li>
</ul>
</div>
<div class="container">
<div id="question-container" class="row"></div>
</div>
<div class="hide-zero-count count{{otherRequestCount}}">
<p>
<label for="show-all-requests-from-others">Show all pending requests from others? </label>
<input type="checkbox" id="show-all-requests-from-others" {{#showRequestsFromOthers}}checked{{/showRequestsFromOthers}}>
</p>
{{#showRequestsFromOthers}}
<div id="all-requests-from-others-div">
<h2>All requests from others</h2>
<ul id="others-permission-requests"></ul>
</div>
{{/showRequestsFromOthers}}
</div>

2
examples/webchat/htdocs/templates/permission-entry.html
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@ -1,2 +0,0 @@
<li>{{issuer}} {{permission}} {{isDelegable}}
{{#isRelinquishable}}<button class="relinquish">Relinquish</button>{{/isRelinquishable}}</li>

3
examples/webchat/htdocs/templates/permission-request-in-GENERIC.html
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@ -1,3 +0,0 @@
<li>{{issuer}} {{grantee}} {{permissionJSON}}
<a href="" class="btn btn-sm btn-primary grant">Grant</a>
<a href="" class="btn btn-sm btn-secondary deny">Deny</a></li>

3
examples/webchat/htdocs/templates/permission-request-in-p:follow.html
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@ -1,3 +0,0 @@
<li>Request from {{grantee}} to follow {{permission.fields.0}}
<a href="" class="btn btn-sm btn-primary grant">Grant</a>
<a href="" class="btn btn-sm btn-secondary deny">Deny</a></li>

1
examples/webchat/htdocs/templates/permission-request-out-GENERIC.html
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@ -1 +0,0 @@
<li>q {{issuer}} {{permissionJSON}} <a href="" class="btn btn-sm btn-secondary cancel">Cancel</a></li>

1
examples/webchat/htdocs/templates/permission-request-out-p:follow.html
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@ -1 +0,0 @@
<li>Request to follow {{issuer}} <a href="" class="btn btn-sm btn-secondary cancel">Cancel</a></li>

7
examples/webchat/htdocs/templates/post-entry.html
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@ -1,7 +0,0 @@
<div id="post-{{postId}}" class="post {{#fromMe}}from-me{{/fromMe}}{{^fromMe}}to-me{{/fromMe}}">
<div class="post-body {{contentClass}} clearfix">
{{^fromMe}}<p class="post-author text-muted">{{author}}</p>{{/fromMe}}
<div class="post-item-container"></div>
<div class="post-date text-muted">{{time}}</div>
</div>
</div>

8
examples/webchat/htdocs/templates/post-item-application-octet-stream.html
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@ -1,8 +0,0 @@
<table class="application-octet-stream">
<tr>
<td><a href="{{itemURL}}"><img src="/Text-x-generic.svg"></a></td>
</tr>
<tr>
<td>{{item.type}}</td>
</tr>
</table>

1
examples/webchat/htdocs/templates/post-item-image.html
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@ -1 +0,0 @@
<img class="post-item-image" src="{{itemURL}}">

1
examples/webchat/htdocs/templates/post-item-text-plain.html
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@ -1 +0,0 @@
<p>{{item.data}}</p>

4
examples/webchat/htdocs/templates/post-item.html
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@ -1,4 +0,0 @@
<div id="{{itemId}}" class="post-item {{#postInfo.isDraft}}post-item-draft{{/postInfo.isDraft}} {{contentClass}} clearfix">
{{#postInfo.isDraft}}<button class="btn close-draft"><i class="icon ion-close"></i></button>{{/postInfo.isDraft}}
<div class="post-item-body-container"></div>
</div>

959
examples/webchat/htdocs/webchat.syndicate.js
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@ -1,959 +0,0 @@
(function () {
// N.B.: "window.status" is an HTML-defined property, and always a
// string, so naming things at "global"-level `status` will not have
// the desired effect!
assertion type online();
assertion type present(email);
assertion type uiTemplate(name, data) = "ui-template";
assertion type permitted(issuer, email, permission, isDelegable);
assertion type grant(issuer, grantor, grantee, permission, isDelegable);
assertion type permissionRequest(issuer, grantee, permission) = "permission-request";
assertion type conversation(id, title, creator, blurb);
assertion type invitation(conversationId, inviter, invitee);
assertion type inConversation(conversationId, member) = "in-conversation";
assertion type post(id, timestamp, conversationId, author, items);
message type createResource(description) = "create-resource";
message type updateResource(description) = "update-resource";
message type deleteResource(description) = "delete-resource";
assertion type pFollow(email) = "p:follow";
// assertion type pInvite(email) = "p:invite";
// assertion type pSeePresence(email) = "p:see-presence";
assertion type contactListEntry(owner, member) = "contact-list-entry";
assertion type question(id, timestamp, klass, target, title, blurb, type);
assertion type answer(id, value);
assertion type yesNoQuestion(falseValue, trueValue) = "yes/no-question";
assertion type optionQuestion(options) = "option-question";
// ^ options = [[Any, Markdown]]
assertion type textQuestion(isMultiline) = "text-question";
assertion type acknowledgeQuestion() = "acknowledge-question";
//---------------------------------------------------------------------------
// Local assertions and messages
assertion type selectedCid(cid); // currently-selected conversation ID, or null
message type windowWidthChanged(newWidth);
assertion type draftItem(timestamp, dataURL);
message type draftSent();
//---------------------------------------------------------------------------
var brokerConnected = Syndicate.Broker.brokerConnected;
var brokerConnection = Syndicate.Broker.brokerConnection;
var toBroker = Syndicate.Broker.toBroker;
var fromBroker = Syndicate.Broker.fromBroker;
var forceBrokerDisconnect = Syndicate.Broker.forceBrokerDisconnect;
///////////////////////////////////////////////////////////////////////////
function compute_broker_url() {
var u = new URL(document.location);
u.protocol = (u.protocol === 'http:') ? 'ws:' : 'wss:';
u.pathname = '/broker';
u.hash = '';
return u.toString();
}
var sessionInfo = {}; // filled in by 'load' event handler
var brokerUrl = compute_broker_url();
function outbound(x) {
return toBroker(brokerUrl, x);
}
function inbound(x) {
return fromBroker(brokerUrl, x);
}
function avatar(email) {
return 'https://www.gravatar.com/avatar/' + md5(email.trim().toLowerCase()) + '?s=48&d=retro';
}
///////////////////////////////////////////////////////////////////////////
document.addEventListener('dragover', function (e) {
e.preventDefault(); // make it so drag-and-drop doesn't load the dropped object into the browser
});
window.addEventListener('load', function () {
if (document.body.id === 'webchat-main') {
$('head meta').each(function (_i, tag) {
var itemprop = tag.attributes.itemprop;
var prefix = 'webchat-session-';
if (itemprop && itemprop.value.startsWith(prefix)) {
var key = itemprop.value.substring(prefix.length);
var value = tag.attributes.content.value;
sessionInfo[key] = value;
}
});
webchat_main();
}
});
function webchat_main() {
ground dataspace G {
Syndicate.UI.spawnUIDriver({
defaultLocationHash: '/conversations'
});
Syndicate.WakeDetector.spawnWakeDetector();
Syndicate.Broker.spawnBrokerClientDriver();
spawnInputChangeMonitor();
spawn {
this.ui = new Syndicate.UI.Anchor();
var mainpage_c = this.ui.context('mainpage');
field this.connectedTo = null;
field this.myRequestCount = 0; // requests *I* have made of others
field this.otherRequestCount = 0; // requests *others* have made of me
field this.questionCount = 0; // questions from the system
field this.globallyVisible = false; // mirrors *other people's experience of us*
field this.locallyVisible = true;
field this.showRequestsFromOthers = false;
field this.miniMode = $(window).width() < 768;
window.addEventListener('resize', Syndicate.Dataspace.wrap(function () {
:: windowWidthChanged($(window).width());
}));
on message windowWidthChanged($newWidth) {
this.miniMode = newWidth < 768;
}
assert brokerConnection(brokerUrl);
on asserted brokerConnected($url) { this.connectedTo = url; }
on retracted brokerConnected(_) { this.connectedTo = null; }
during inbound(online()) {
on start { this.globallyVisible = true; }
on stop { this.globallyVisible = false; }
}
during inbound(question($qid, _, _, sessionInfo.email, _, _, _)) {
on start { this.questionCount++; }
on stop { this.questionCount--; }
}
during inbound(permissionRequest($issuer, sessionInfo.email, $permission)) {
on start { this.myRequestCount++; }
on stop { this.myRequestCount--; }
}
during inbound(uiTemplate("nav-account.html", $entry)) {
var c = this.ui.context('nav', 0, 'account');
assert outbound(online()) when (this.locallyVisible);
assert c.html('#nav-ul', Mustache.render(entry, {
email: sessionInfo.email,
avatar: avatar(sessionInfo.email),
questionCount: this.questionCount,
myRequestCount: this.myRequestCount,
otherRequestCount: this.otherRequestCount,
globallyVisible: this.globallyVisible,
locallyVisible: this.locallyVisible
}));
on message c.event('.toggleInvisible', 'click', _) {
this.locallyVisible = !this.locallyVisible;
}
}
during Syndicate.UI.locationHash('/contacts') {
during inbound(uiTemplate("page-contacts.html", $mainEntry)) {
assert mainpage_c.html('div#main-div', Mustache.render(mainEntry, {}));
}
during inbound(uiTemplate("contact-entry.html", $entry)) {
during mainpage_c.fragmentVersion($mainpageVersion) {
during inbound(contactListEntry(sessionInfo.email, $contact)) {
field this.pendingContactRequest = false;
field this.isPresent = false;
during inbound(present(contact)) {
on start { this.isPresent = true; }
on stop { this.isPresent = false; }
}
during inbound(permissionRequest(contact, sessionInfo.email, pFollow(contact))) {
on start { this.pendingContactRequest = true; }
on stop { this.pendingContactRequest = false; }
}
var c = this.ui.context(mainpageVersion, 'all-contacts', contact);
assert c.html('.contact-list', Mustache.render(entry, {
email: contact,
avatar: avatar(contact),
pendingContactRequest: this.pendingContactRequest,
isPresent: this.isPresent
}));
on message c.event('.delete-contact', 'click', _) {
if (confirm((this.pendingContactRequest
? "Cancel contact request to "
: "Delete contact ")
+ contact + "?")) {
:: outbound(deleteResource(permitted(sessionInfo.email,
contact,
pFollow(sessionInfo.email),
false))); // TODO: true too?!
}
}
}
}
}
during mainpage_c.fragmentVersion($mainpageVersion) {
during inputValue('#add-contact-email', $rawContact) {
var contact = rawContact && rawContact.trim();
if (contact) {
on message mainpage_c.event('#add-contact', 'click', _) {
:: outbound(createResource(grant(sessionInfo.email,
sessionInfo.email,
contact,
pFollow(sessionInfo.email),
false)));
$('#add-contact-email').val('');
}
}
}
}
}
during Syndicate.UI.locationHash('/permissions') {
during inbound(uiTemplate("page-permissions.html", $mainEntry)) {
assert mainpage_c.html('div#main-div', Mustache.render(mainEntry, {}));
}
during inbound(uiTemplate("permission-entry.html", $entry)) {
during mainpage_c.fragmentVersion($mainpageVersion) {
during inbound(permitted($i, $e, $p, $d)) {
if (i !== sessionInfo.email) {
var c = this.ui.context(mainpageVersion, 'permitted', i, e, p, d);
assert c.html('#permissions', Mustache.render(entry, {
issuer: i,
email: e,
permission: JSON.stringify(p),
isDelegable: d,
isRelinquishable: i !== e
}));
on message c.event('.relinquish', 'click', _) {
:: outbound(deleteResource(permitted(i, e, p, d)));
}
}
}
}
}
during inbound(uiTemplate("grant-entry.html", $entry)) {
during mainpage_c.fragmentVersion($mainpageVersion) {
during inbound(grant($i, sessionInfo.email, $ge, $p, $d)) {
var c = this.ui.context(mainpageVersion, 'granted', i, ge, p, d);
assert c.html('#grants', Mustache.render(entry, {
issuer: i,
grantee: ge,
permission: JSON.stringify(p),
isDelegable: d
}));
on message c.event('.revoke', 'click', _) {
:: outbound(deleteResource(grant(i, sessionInfo.email, ge, p, d)));
}
}
}
}
}
during Syndicate.UI.locationHash('/my-requests') {
during inbound(uiTemplate("page-my-requests.html", $mainEntry)) {
assert mainpage_c.html('div#main-div', Mustache.render(mainEntry, {
myRequestCount: this.myRequestCount
}));
}
during inbound(permissionRequest($issuer, sessionInfo.email, $permission)) {
during inbound(uiTemplate("permission-request-out-GENERIC.html", $genericEntry)) {
during mainpage_c.fragmentVersion($mainpageVersion) {
var c = this.ui.context(mainpageVersion, 'my-permission-request', issuer, permission);
field this.entry = genericEntry;
assert c.html('#my-permission-requests', Mustache.render(this.entry, {
issuer: issuer,
permission: permission,
permissionJSON: JSON.stringify(permission)
})) when (this.entry);
var specificTemplate = "permission-request-out-" +
encodeURIComponent(permission.meta.label) + ".html";
on asserted inbound(uiTemplate(specificTemplate, $specificEntry)) {
this.entry = specificEntry || genericEntry;
}
on message c.event('.cancel', 'click', _) {
:: outbound(deleteResource(permissionRequest(issuer, sessionInfo.email, permission)));
}
}
}
}
}
during Syndicate.UI.locationHash('/questions') {
during inbound(uiTemplate("page-questions.html", $mainEntry)) {
assert mainpage_c.html('div#main-div', Mustache.render(mainEntry, {
questionCount: this.questionCount,
otherRequestCount: this.otherRequestCount,
showRequestsFromOthers: this.showRequestsFromOthers
}));
}
during mainpage_c.fragmentVersion($mainpageVersion) {
during inputValue('#show-all-requests-from-others', $showRequestsFromOthers) {
on start { this.showRequestsFromOthers = showRequestsFromOthers; }
}
}
during inbound(uiTemplate("permission-request-in-GENERIC.html", $genericEntry)) {
during mainpage_c.fragmentVersion($mainpageVersion) {
during inbound(permissionRequest($issuer, $grantee, $permission)) {
if (grantee !== sessionInfo.email) {
on start { this.otherRequestCount++; }
on stop { this.otherRequestCount--; }
var c = this.ui.context(mainpageVersion, 'others-permission-request', issuer, grantee, permission);
field this.entry = genericEntry;
assert c.html('#others-permission-requests', Mustache.render(this.entry, {
issuer: issuer,
grantee: grantee,
permission: permission,
permissionJSON: JSON.stringify(permission)
})) when (this.entry);
var specificTemplate = "permission-request-in-" +
encodeURIComponent(permission.meta.label) + ".html";
on asserted inbound(uiTemplate(specificTemplate, $specificEntry)) {
this.entry = specificEntry || genericEntry;
}
on message c.event('.grant', 'click', _) {
:: outbound(createResource(grant(issuer,
sessionInfo.email,
grantee,
permission,
false)));
}
on message c.event('.deny', 'click', _) {
:: outbound(deleteResource(permissionRequest(issuer, grantee, permission)));
}
}
}
}
}
during inbound(question($qid, $timestamp, $klass, sessionInfo.email, $title, $blurb, $qt))
{
during mainpage_c.fragmentVersion($mainpageVersion) {
var c = this.ui.context(mainpageVersion, 'question', timestamp, qid);
switch (qt.meta.label) {
case "option-question": {
var options = qt.fields[0];
during inbound(uiTemplate("option-question.html", $entry)) {
assert c.html('#question-container', Mustache.render(entry, {
questionClass: klass,
title: title,
blurb: blurb,
options: options
}));
on message c.event('.response', 'click', $e) {
react { assert outbound(answer(qid, e.target.dataset.value)); }
}
}
break;
}
default: {
break;
}
}
}
}
}
var conversations_re = /^\/conversations(\/(.*))?/;
during Syndicate.UI.locationHash($locationHash) {
var m = locationHash.match(conversations_re);
if (m) {
assert selectedCid(m[2] || false);
}
}
during inbound(uiTemplate("page-conversations.html", $mainEntry)) {
during selectedCid(false) {
assert mainpage_c.html('div#main-div', Mustache.render(mainEntry, {
miniMode: this.miniMode,
showConversationList: true,
showConversationMain: !this.miniMode,
showConversationInfo: false,
showConversationPosts: false,
selected: false
}));
}
}
// Move to the conversation index page when we leave a
// conversation (which also happens automatically when it is
// deleted)
during selectedCid($selected) {
on retracted inbound(inConversation(selected, sessionInfo.email)) {
:: Syndicate.UI.setLocationHash('/conversations');
}
}
during inbound(inConversation($cid, sessionInfo.email)) {
field this.members = Immutable.Set();
field this.title = '';
field this.creator = '';
field this.blurb = '';
field this.editingTitle = false;
field this.editingBlurb = false;
field this.membersJSON = [];
dataflow {
this.membersJSON = this.members.map(function (m) { return {
email: m,
avatar: avatar(m)
}; }).toArray();
}
on asserted inbound(inConversation(cid, $who)) {
this.members = this.members.add(who);
}
on retracted inbound(inConversation(cid, $who)) {
this.members = this.members.remove(who);
}
on asserted inbound(conversation(cid, $title, $creator, $blurb)) {
this.title = title;
this.creator = creator;
this.blurb = blurb;
}
during inbound(uiTemplate("page-conversations.html", $mainEntry)) {
during selectedCid($selected) {
if (selected === cid) {
field this.showInfoMode = false;
field this.latestPostTimestamp = 0;
field this.latestPostId = null;
field this.draftItems = Immutable.Map();
on asserted draftItem($ts, $d) { this.draftItems = this.draftItems.set(ts, d); }
on retracted draftItem($ts, _) { this.draftItems = this.draftItems.remove(ts); }
assert mainpage_c.html('div#main-div', Mustache.render(mainEntry, {
miniMode: this.miniMode,
showConversationList: !this.miniMode,
showConversationMain: true,
showConversationInfo: !this.miniMode || this.showInfoMode,
showConversationPosts: !this.miniMode || !this.showInfoMode,
selected: selected,
title: this.title,
blurb: this.blurb,
members: this.membersJSON,
editingTitle: this.editingTitle,
editingBlurb: this.editingBlurb,
overflowMenuItems: [
{label: "Invite user...", action: "invite-to-conversation"},
{label: "Leave conversation", action: "leave-conversation"},
{separator: true,
hidden: sessionInfo.email !== this.creator},
{label: "Delete conversation", action: "delete-conversation",
hidden: sessionInfo.email !== this.creator}
]
}));
on message mainpage_c.event('#message-input', 'focus', $e) {
setTimeout(function () { e.target.scrollIntoView(false); }, 500);
}
var spawnItemFromDataURL = (function (ui) {
return function (dataURL) {
var timestamp = +(new Date());
spawn {
field this.ui = ui.context('draft-post', timestamp);
assert draftItem(timestamp, dataURL);
manifestPostItem(this.ui,
'#pending-draft-items',
{
isDraft: true,
postId: 'draft',
timestamp: timestamp,
fromMe: true,
author: sessionInfo.email
},
dataURL);
stop on message draftSent();
stop on message this.ui.event('.close-draft', 'click', _);
}
};
})(this.ui);
var handleDataTransfer = function (dataTransfer) {
return dataTransferFiles(dataTransfer, Syndicate.Dataspace.wrap(
function (dataURLs) {
dataURLs.forEach(spawnItemFromDataURL);
}));
};
on message mainpage_c.event('#conversation-main', 'drop', $e) {
handleDataTransfer.call(this, e.dataTransfer);
}
on message mainpage_c.event('#message-input', '+paste', $e) {
if (handleDataTransfer.call(this, e.clipboardData)) {
e.preventDefault();
}
}
on message mainpage_c.event('#attach-item-button', 'click', _) {
console.log('clickenating');
$('#attach-item-file').click();
}
on message mainpage_c.event('#attach-item-file', 'change', $e) {
if (e.target.files) {
for (var i = 0; i < e.target.files.length; i++) {
var file = e.target.files[i];
var reader = new FileReader();
reader.addEventListener('load', Syndicate.Dataspace.wrap(function (e) {
spawnItemFromDataURL(e.target.result);
}));
reader.readAsDataURL(file);
}
}
}
on message mainpage_c.event('#send-message-button', 'click', _) {
var timestamp = +(new Date());
var items = this.draftItems.entrySeq().toArray();
items.sort(function (a, b) { return a[0] - b[0]; });
var message = ($("#message-input").val() || '').trim();
if (message) {
var b64 = btoa(unescape(encodeURIComponent(message))); // utf-8, then base64
items.push([timestamp,
"data:text/plain;charset=utf-8;base64," + encodeURIComponent(b64)]);
}
if (items.length) {
:: outbound(createResource(post(random_hex_string(16),
timestamp,
cid,
sessionInfo.email,
items.map(function (di) { return di[1]; }))));
}
$("#message-input").val('').focus();
:: draftSent();
}
on message mainpage_c.event('.invite-to-conversation', 'click', _) {
$('#invitation-modal').modal({});
}
on message mainpage_c.event('.send-invitation', 'click', _) {
var invitee = $('#invited-username').val().trim();
if (invitee) {
:: outbound(createResource(invitation(cid, sessionInfo.email, invitee)));
$('#invited-username').val('');
$('#invitation-modal').modal('hide');
}
}
on message mainpage_c.event('.leave-conversation', 'click', _) {
:: outbound(deleteResource(inConversation(cid, sessionInfo.email)));
}
on message mainpage_c.event('.delete-conversation', 'click', _) {
if (confirm("Delete this conversation?")) {
:: outbound(deleteResource(conversation(cid,
this.title,
this.creator,
this.blurb)));
}
}
on message mainpage_c.event('.toggle-info-mode', 'click', _) {
this.showInfoMode = !this.showInfoMode;
}
on message mainpage_c.event('.end-info-mode', 'click', _) {
this.showInfoMode = false;
}
on message mainpage_c.event('#edit-conversation-title', 'click', _) {
this.editingTitle = true;
}
on message mainpage_c.event('#title-heading', 'dblclick', _) {
this.editingTitle = true;
}
on message mainpage_c.event('#accept-conversation-title', 'click', _) {
this.title = $('#conversation-title').val();
:: outbound(updateResource(conversation(cid,
this.title,
this.creator,
this.blurb)));
this.editingTitle = false;
}
on message mainpage_c.event('#cancel-edit-conversation-title', 'click', _) {
this.editingTitle = false;
}
on message mainpage_c.event('#edit-conversation-blurb', 'click', _) {
this.editingBlurb = true;
}
on message mainpage_c.event('#blurb', 'dblclick', _) {
this.editingBlurb = true;
}
on message mainpage_c.event('#accept-conversation-blurb', 'click', _) {
this.blurb = $('#conversation-blurb').val();
:: outbound(updateResource(conversation(cid,
this.title,
this.creator,
this.blurb)));
this.editingBlurb = false;
}
on message mainpage_c.event('#cancel-edit-conversation-blurb', 'click', _) {
this.editingBlurb = false;
}
during mainpage_c.fragmentVersion($mainpageVersion) {
during inbound(post($pid, $timestamp, cid, $author, $items)) {
var fromMe = (author === sessionInfo.email);
var postInfo = {
isDraft: false,
postId: pid,
timestamp: timestamp,
date: new Date(timestamp).toString(),
time: new Date(timestamp).toTimeString().substr(0, 8),
fromMe: fromMe,
author: author
};
if (timestamp > this.latestPostTimestamp) {
this.latestPostTimestamp = timestamp;
this.latestPostId = pid;
}
var c = this.ui.context(mainpageVersion, 'post', timestamp, pid);
during inbound(uiTemplate("post-entry.html", $postEntryTemplate)) {
assert c.html('.posts', Mustache.render(postEntryTemplate, postInfo));
during c.fragmentVersion($postEntryVersion) {
var itemCounter = 0;
items.forEach((function (itemURL) {
manifestPostItem(c.context('item', postEntryVersion, itemCounter++),
'#post-' + pid + ' .post-item-container',
postInfo,
itemURL);
}).bind(this));
}
}
}
}
}
during inbound(uiTemplate("conversation-index-entry.html", $indexEntry)) {
during mainpage_c.fragmentVersion($mainpageVersion) {
var c = this.ui.context(mainpageVersion, 'conversationIndex', cid);
assert c.html('#conversation-list', Mustache.render(indexEntry, {
isSelected: selected === cid,
selected: selected,
cid: cid,
title: this.title,
creator: this.creator,
members: this.membersJSON
}));
on message c.event('.card-block', 'click', _) {
if (selected === cid) {
:: Syndicate.UI.setLocationHash('/conversations');
} else {
:: Syndicate.UI.setLocationHash('/conversations/' + cid);
}
}
}
}
}
}
}
during Syndicate.UI.locationHash('/new-chat') {
field this.invitees = Immutable.Set();
field this.searchString = '';
field this.displayedSearchString = ''; // avoid resetting HTML every keystroke. YUCK
during inbound(uiTemplate("page-new-chat.html", $mainEntry)) {
assert mainpage_c.html('div#main-div', Mustache.render(mainEntry, {
noInvitees: this.invitees.isEmpty(),
searchString: this.displayedSearchString
}));
}
during mainpage_c.fragmentVersion($mainpageVersion) {
on message Syndicate.UI.globalEvent('#search-contacts', 'keyup', $e) {
this.searchString = e.target.value.trim();
}
on message mainpage_c.event('.create-conversation', 'click', _) {
if (!this.invitees.isEmpty()) {
var title = $('#conversation-title').val();
var blurb = $('#conversation-blurb').val();
var cid = random_hex_string(32);
:: outbound(createResource(conversation(cid, title, sessionInfo.email, blurb)));
:: outbound(createResource(inConversation(cid, sessionInfo.email)));
this.invitees.forEach(function (invitee) {
:: outbound(createResource(invitation(cid, sessionInfo.email, invitee)));
});
:: Syndicate.UI.setLocationHash('/conversations/' + cid);
}
}
}
during inbound(uiTemplate("invitee-entry.html", $entry)) {
during mainpage_c.fragmentVersion($mainpageVersion) {
during inbound(contactListEntry(sessionInfo.email, $contact)) {
field this.isPresent = false;
field this.isInvited = false;
dataflow {
this.isInvited = this.invitees.contains(contact);
}
during inbound(present(contact)) {
on start { this.isPresent = true; }
on stop { this.isPresent = false; }
}
var c = this.ui.context(mainpageVersion, 'all-contacts', contact);
assert c.html('.contact-list', Mustache.render(entry, {
email: contact,
avatar: avatar(contact),
isPresent: this.isPresent,
isInvited: this.isInvited
})) when (this.isInvited ||
!this.searchString ||
contact.indexOf(this.searchString) !== -1);
on message c.event('.toggle-invitee-status', 'click', _) {
if (this.invitees.contains(contact)) {
this.invitees = this.invitees.remove(contact);
} else {
this.invitees = this.invitees.add(contact);
}
this.displayedSearchString = this.searchString;
}
}
}
}
}
}
}
// G.dataspace.setOnStateChange(function (mux, patch) {
// $("#debug-space").text(Syndicate.prettyTrie(mux.routingTable));
// });
}
var nextItemid = 0;
function manifestPostItem(uiContext, containerSelector, postInfo, itemURL) {
function cleanContentType(t) {
t = t.toLowerCase();
if (t.startsWith('image/')) {
t = 'image';
} else {
t = t.replace('/', '-');
}
return t;
}
var item = parseDataURL(itemURL);
var itemId = 'post-' + postInfo.postId + '-item-' + nextItemid++;
var contentClass = cleanContentType(item.type);
var itemInfo = {
itemId: itemId,
postInfo: postInfo,
contentClass: contentClass,
item: item,
itemURL: itemURL
};
during inbound(uiTemplate("post-item.html", $postItemTemplate)) {
field this.entry = false;
on asserted inbound(uiTemplate("post-item-" + contentClass + ".html", $entry)) {
if (entry) this.entry = entry;
}
on asserted inbound(uiTemplate("post-item-application-octet-stream.html", $entry)) {
if (entry && !this.entry) this.entry = entry;
}
assert uiContext.html(containerSelector, Mustache.render(postItemTemplate, itemInfo));
on asserted uiContext.fragmentVersion($postItemVersion) {
var innerContext = uiContext.context('item-body', postItemVersion);
assert innerContext.html('#' + itemId + ' .post-item-body-container',
Mustache.render(this.entry, itemInfo)) when (this.entry);
if (!postInfo.isDraft) {
on asserted innerContext.fragmentVersion($innerContextVersion) {
if ((this.latestPostTimestamp === postInfo.timestamp) &&
(this.latestPostId === postInfo.postId)) {
setTimeout(function () { $("#post-" + postInfo.postId)[0].scrollIntoView(false); }, 1);
}
}
}
}
}
}
})();
///////////////////////////////////////////////////////////////////////////
// Input control value monitoring
assertion type inputValue(selector, value);
function spawnInputChangeMonitor() {
function valOf(e) {
return e ? (e.type === 'checkbox' ? e.checked : e.value) : null;
}
spawn {
during Syndicate.observe(inputValue($selector, _)) spawn {
field this.value = valOf($(selector)[0]);
assert inputValue(selector, this.value);
on message Syndicate.UI.globalEvent(selector, 'change', $e) {
this.value = valOf(e.target);
}
}
}
}
///////////////////////////////////////////////////////////////////////////
function random_hex_string(halfLength) {
var bs = new Uint8Array(halfLength);
var encoded = [];
crypto.getRandomValues(bs);
for (var i = 0; i < bs.length; i++) {
encoded.push("0123456789abcdef"[(bs[i] >> 4) & 15]);
encoded.push("0123456789abcdef"[bs[i] & 15]);
}
return encoded.join('');
}
///////////////////////////////////////////////////////////////////////////
function parseDataURL(u) {
var pieces;
if (!u.startsWith('data:')) return null;
u = u.substr(5);
pieces = u.split(',');
if (pieces.length !== 2) return null;
var mimeType = pieces[0];
var data = decodeURIComponent(pieces[1]);
var isBase64 = false;
if (mimeType.endsWith(';base64')) {
mimeType = mimeType.substr(0, mimeType.length - 7);
isBase64 = true;
}
if (isBase64) {
data = atob(data);
}
pieces = mimeType.split(';');
var type = pieces[0];
var parameters = {};
for (var i = 1; i < pieces.length; i++) {
var m = pieces[i].match(/^([^=]+)=(.*)$/);
if (m) {
parameters[m[1].toLowerCase()] = m[2];
}
}
if (type.startsWith('text/')) {
var charset = (parameters.charset || 'US-ASCII').toLowerCase();
switch (charset) {
case 'utf-8':
data = decodeURIComponent(escape(data));
break;
case 'us-ascii':
case 'ascii':
case 'latin1':
case 'iso-8859-1':
break;
default:
console.warn('Unknown charset while decoding data URL:', charset);
break;
}
}
return {
type: type,
parameters: parameters,
data: data
};
}
///////////////////////////////////////////////////////////////////////////
// Extract file contents from a DataTransfer object
function dataTransferFiles(d, k) {
var items = d.items;
var types = d.types;
var files = d.files;
var results = [];
var expectedCount = files.length;
var completedCount = 0;
function completeOne() {
completedCount++;
if (completedCount === expectedCount) {
k(results);
}
}
for (var i = 0; i < items.length; i++) {
(function (i) {
var item = items[i];
var type = types[i];
if (type === 'text/uri-list') {
expectedCount++;
item.getAsString(function (itemstr) {
var firstChunk = itemstr.substr(0, 6).toLowerCase();
if (firstChunk.startsWith('http:') || firstChunk.startsWith('https:')) {
$.ajax({
type: "GET",
url: itemstr,
beforeSend: function (xhr) {
xhr.overrideMimeType('text/plain; charset=x-user-defined');
},
success: function (_data, _status, xhr) {
var contentType = xhr.getResponseHeader('content-type');
var rawdata = xhr.responseText;
var data = [];
for (var j = 0; j < rawdata.length; j++) {
data = data + String.fromCharCode(rawdata.charCodeAt(j) & 0xff);
}
results.push('data:' + contentType + ';base64,' + encodeURIComponent(btoa(data)));
completeOne();
},
error: function () {
completeOne();
}
});
} else {
completeOne();
}
});
}
})(i);
}
for (var i = 0; i < files.length; i++) {
(function (i) {
var file = files[i];
var reader = new FileReader();
reader.addEventListener('load', function (e) {
results.push(e.target.result);
completeOne();
});
reader.readAsDataURL(file);
})(i);
}
return (expectedCount > 0);
}

2
examples/webchat/server/.gitignore vendored
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@ -1,2 +0,0 @@
testing.rktd
compiled/main_rkt.*

36
examples/webchat/server/TODO.md
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@ -1,36 +0,0 @@
✓ Remove delete-account, use delete-resource of an account instead
✓ Reimplement spawn-session-monitor and end-session to work in terms
of create-resource and delete-resource, but leave login-link
idiosyncratic
Factor out resource management into its own module. Introduce a macro
for describing resources, their cascading deletion conditions, and
their potential automatic expiries.
Build a persistent resource management module. Adjust
`immediate-query` to be able to use an alternative `flush!` routine.
NOTE that automatic expiry in the direct implementation is as simple
as `stop-when-timeout`, but cannot be this simple in a persistent
implementation: instead, I plan on producing a special "expiries"
table, each entry of which specifies a message to send upon expiry.
NOTE that the trick of producing a base `p:follow` grant record on
account creation has to be done differently when there's no
always-on account process.
NOTE that the trick of deleting an `invitation` when a matching
`in-conversation` appears also has to be done differently, similarly
to the `p:follow` grant mentioned above. However, this might be able
to be automated: if there's some kind of `(stop-when E)` where `E`
mentions some field or fields of a resource, matching resources can
be deleted from the persistent store by an auxiliary process. This
would require fairly hairy syntactic analysis though, so it might be
better to have some kind of `cascading-delete-when` form to spell
out what should be removed on a given event. (Then the `p:follow`
case above can be implemented with some kind of
`cascading-insert-when`?)
NOTE that these differences are OK: this is the first time Syndicate
has tackled persistence at all in any interesting way.

27
examples/webchat/server/account.rkt
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@ -1,27 +0,0 @@
#lang syndicate
(require racket/set)
(require/activate syndicate/reload)
(require/activate syndicate/supervise)
(require "protocol.rkt")
(require "duplicate.rkt")
(spawn #:name 'account-manager
(stop-when-reloaded)
(define/query-set accounts (account $e) e)
(on (asserted (session $email _))
(when (not (set-member? (accounts) email))
(send! (create-resource (account email))))))
(spawn #:name 'account-factory
(stop-when-reloaded)
(on (message (create-resource ($ a (account $email))))
(spawn #:name (list 'account email)
(on-start (log-info "Account ~s created." email))
(on-stop (log-info "Account ~s deleted." email))
(assert a)
(assert (grant email email email (p:follow email) #t))
(stop-when-duplicate a)
(stop-when (message (delete-resource a))))))

78
examples/webchat/server/api.rkt
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@ -1,78 +0,0 @@
#lang syndicate
(require/activate syndicate/reload)
(require/activate syndicate/supervise)
(require/activate syndicate/broker/server)
(require/activate syndicate/drivers/web)
(require/activate "trust.rkt")
(require "protocol.rkt")
(require "session-cookie.rkt")
(spawn #:name 'broker-listener
(stop-when-reloaded)
(on (web-request-get (id req) _ ("broker" ()))
(when (web-request-header-websocket-upgrade? req)
(with-session id
[(email sid)
(define (scope v) (api (session email sid) v))
(spawn-broker-server-connection
id
req
#:scope scope
#:hook (lambda ()
(stop-when (message (end-session sid)))
(stop-when (message (delete-resource (account email))))))]
[else
(web-respond/xexpr! id
#:header (web-response-header #:code 401
#:message #"Unauthorized")
`(html (body (h1 "Unauthorized")
(a ((href "/")) "Login"))))]))))
(supervise
(spawn #:name 'reflect-trust
(stop-when-reloaded)
(during (session $who _)
(during ($ p (permitted _ who _ _))
(assert (api (session who _) p)))
(during ($ r (permission-request _ who _))
(assert (api (session who _) r)))
(during ($ g (grant _ who _ _ _))
(assert (api (session who _) g)))
(during ($ c (contact-list-entry who _))
(assert (api (session who _) c))))))
(supervise
(spawn #:name 'reflect-grant-requests
(stop-when-reloaded)
(during (permission-request $issuer $grantee $permission)
(define r (permission-request issuer grantee permission))
(during (permitted issuer $grantor permission #t)
(assert (api (session grantor _) r))
(on (message (api (session grantor _) (delete-resource r)))
(send! (delete-resource r)))))))
(supervise
(spawn #:name 'take-trust-instructions
(stop-when-reloaded)
(on (message (api (session $grantor _) (create-resource (? grant? $g))))
(when (equal? grantor (grant-grantor g))
(send! (create-resource g))))
(on (message (api (session $grantor _) (delete-resource (? grant? $g))))
(when (or (equal? grantor (grant-grantor g))
(equal? grantor (grant-issuer g)))
(send! (delete-resource g))))
(on (message (api (session $principal _) (delete-resource (? permitted? $p))))
(when (or (equal? principal (permitted-email p)) ;; relinquish
(equal? principal (permitted-issuer p))) ;; revoke; TODO: deal with delegation
(send! (delete-resource p))))
(on (message (api (session $grantee _) (create-resource (? permission-request? $r))))
(when (equal? grantee (permission-request-grantee r))
(send! (create-resource r))))
(on (message (api (session $grantee _) (delete-resource (? permission-request? $r))))
(when (equal? grantee (permission-request-grantee r))
(send! (delete-resource r))))))

54
examples/webchat/server/config.rkt
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@ -1,54 +0,0 @@
#lang syndicate
(require racket/cmdline)
(require racket/port)
(require/activate syndicate/reload)
(require/activate syndicate/supervise)
(require/activate syndicate/drivers/config)
(require/activate syndicate/drivers/web)
(require/activate syndicate/drivers/smtp)
(require "protocol.rkt")
(command-line #:program "webchat"
#:once-each
["--baseurl" baseurl "Specify the base URL for the server"
(spawn #:name (list 'command-line-baseurl baseurl)
(stop-when-reloaded)
(assert (config 'command-line (list 'baseurl baseurl))))]
["--listen" port "Specify HTTP listener port"
(spawn #:name (list 'command-line-listen port)
(stop-when-reloaded)
(assert (config 'command-line (list 'listen (string->number port)))))]
#:multi
[("-o" "--option") key vals "Specify a single configuration option"
(spawn #:name (list 'config-option key vals)
(stop-when-reloaded)
(assert (config 'command-line
(cons (string->symbol key)
(port->list read (open-input-string vals))))))]
[("-f" "--config-file") filename "Specify a configuration file to load"
(spawn-configuration filename filename
#:hook (lambda () (stop-when-reloaded)))])
(spawn #:name 'main
(stop-when-reloaded)
(during (config _ (list 'baseurl $u)) (assert (server-baseurl u)))
(during (config _ (list 'listen $p)) (assert (web-virtual-host "http" _ p)))
(during/spawn (config _ (list 'load $module-path))
#:spawn supervise/spawn
#:name (list 'load module-path)
(reloader-mixin* module-path))
(during (config _ (list 'smtp $h $u $p $m))
(match h
[(regexp #px"(.*):(.*)" (list _ host port))
(assert (smtp-account-config 'smtp-service host #:port (string->number port)
#:user u #:password p #:ssl-mode m))]
[_
(assert (smtp-account-config 'smtp-service h #:user u #:password p #:ssl-mode m))])))

87
examples/webchat/server/contacts.rkt
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@ -1,87 +0,0 @@
#lang syndicate
(require/activate syndicate/reload)
(require/activate syndicate/supervise)
(require/activate "trust.rkt")
(require/activate "qa.rkt")
(require "protocol.rkt")
(require "duplicate.rkt")
;; TODO: Move to protocol.rkt
(struct online () #:prefab)
(struct present (email) #:prefab)
(supervise
(spawn #:name 'reflect-presence
(stop-when-reloaded)
(during (api (session $who _) (online))
(during (permitted who $grantee (p:follow who) _)
;; `who` allows `grantee` to follow them
(assert (api (session grantee _) (present who)))))))
(supervise
(spawn #:name 'ensure-p:follow-symmetric
(stop-when-reloaded)
(on (asserted (permitted $A $B (p:follow $maybe-A) _))
(when (equal? A maybe-A)
(send! (create-resource (permission-request B A (p:follow B))))))
(on (retracted (permitted $A $B (p:follow $maybe-A) _))
(when (equal? A maybe-A)
(send! (delete-resource (permission-request B A (p:follow B))))
(send! (delete-resource (permitted B A (p:follow B) ?)))))
(on (retracted (permission-request $A $B (p:follow $maybe-A)))
(when (equal? A maybe-A)
(when (not (immediate-query [query-value #f (permitted A B (p:follow A) _) #t]))
(send! (delete-resource (permitted B A (p:follow B) ?))))))))
(supervise
(spawn #:name 'contact-list-factory
(stop-when-reloaded)
(during (permission-request $A $B (p:follow $maybe-A))
(when (equal? A maybe-A)
(assert (contact-list-entry B A))))
(during (permitted $A $B (p:follow $maybe-A) _)
(when (equal? A maybe-A)
(when (string<? A B)
(during (permitted B A (p:follow B) _)
(assert (contact-list-entry A B))
(assert (contact-list-entry B A))))))))
(supervise
(spawn #:name 'contact-list-change-log
(stop-when-reloaded)
(on (asserted (contact-list-entry $owner $member))
(log-info "~s adds ~s to their contact list" owner member))
(on (retracted (contact-list-entry $owner $member))
(log-info "~s removes ~s from their contact list" owner member))))
(supervise
(spawn #:name 'contacts:questions
(stop-when-reloaded)
;; TODO: CHECK THE FOLLOWING: When the `permission-request` vanishes (due to
;; satisfaction or rejection), this should remove the question from all eligible
;; answerers at once
(during (permission-request $who $grantee ($ p (p:follow _)))
(when (equal? who (p:follow-email p))
;; `grantee` wants to follow `who`
(during (permitted who $grantor p #t)
;; `grantor` can make that decision
(define-values (title blurb)
(if (equal? who grantor)
(values (format "Contact request from ~a" grantee)
`(p "User " (b ,grantee) " wants to be able to invite you "
"to conversations and see when you are online."))
(values (format "Contact request from ~a to ~a" grantee who)
`(p "User " (b ,grantee) " wants to be able to invite "
(b ,who) " to conversations and see when they are online."))))
(define qid
(ask-question! #:title title #:blurb blurb #:target grantor #:class "q-follow"
(option-question (list (list "allow" "Accept")
(list "deny" "Reject")
(list "ignore" "Ignore")))))
(stop-when (asserted (answer qid $v))
(match v
["allow" (send! (create-resource (grant who grantor grantee p #f)))]
["deny" (send! (delete-resource (permission-request who grantee p)))]
["ignore" (void)])))))))

164
examples/webchat/server/conversation.rkt
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@ -1,164 +0,0 @@
#lang syndicate
(require racket/port)
(require markdown)
(require/activate syndicate/reload)
(require/activate syndicate/supervise)
(require/activate "trust.rkt")
(require "protocol.rkt")
(require "duplicate.rkt")
(require "util.rkt")
(define (user-in-conversation? who cid)
(immediate-query [query-value #f (in-conversation cid who) #t]))
(supervise
(spawn #:name 'take-conversation-instructions
(stop-when-reloaded)
(on (message (api (session $creator _) (create-resource (? conversation? $c))))
(when (equal? creator (conversation-creator c))
(send! (create-resource c))))
(on (message (api (session $updater _) (update-resource (? conversation? $c))))
(when (user-in-conversation? updater (conversation-id c))
(send! (update-resource c))))
(on (message (api (session $creator _) (delete-resource (? conversation? $c))))
(when (equal? creator (conversation-creator c))
(send! (delete-resource c))))
(on (message (api (session $joiner _) (create-resource (? in-conversation? $i))))
(when (equal? joiner (in-conversation-member i))
(send! (create-resource i))))
(on (message (api (session $leaver _) (delete-resource (? in-conversation? $i))))
(when (equal? leaver (in-conversation-member i))
(send! (delete-resource i))))
(on (message (api (session $inviter _) (create-resource (? invitation? $i))))
(when (equal? inviter (invitation-inviter i))
(send! (create-resource i))))
(on (message (api (session $who _) (delete-resource (? invitation? $i))))
(when (or (equal? who (invitation-inviter i))
(equal? who (invitation-invitee i)))
(send! (delete-resource i))))
(on (message (api (session $who _) (create-resource (? post? $p))))
(when (and (user-in-conversation? who (post-conversation-id p))
(equal? who (post-author p)))
(send! (create-resource p))))
(on (message (api (session $who _) (update-resource (? post? $p))))
(when (equal? who (post-author p))
(send! (update-resource p))))
(on (message (api (session $who _) (delete-resource (? post? $p))))
(when (equal? who (post-author p))
(send! (delete-resource p))))))
(supervise
(spawn #:name 'relay-conversation-state
(stop-when-reloaded)
(during (invitation $cid $inviter $invitee)
(assert (api (session invitee _) (invitation cid inviter invitee)))
(during ($ c (conversation cid _ _ _))
(assert (api (session invitee _) c))))
(during (in-conversation $cid $who)
(during ($ i (invitation cid _ _))
(assert (api (session who _) i)))
(during ($ i (in-conversation cid _))
(assert (api (session who _) i)))
(during ($ c (conversation cid _ _ _))
(assert (api (session who _) c)))
(during ($ p (post _ _ cid _ _))
(assert (api (session who _) p))))))
(supervise
(spawn #:name 'conversation-factory
(stop-when-reloaded)
(on (message (create-resource ($ c0 (conversation $cid $title0 $creator $blurb0))))
(spawn #:name c0
(field [title title0]
[blurb blurb0])
(define/dataflow c (conversation cid (title) creator (blurb)))
(on-start (log-info "~v created" (c)))
(on-stop (log-info "~v deleted" (c)))
(assert (c))
(stop-when-duplicate (list 'conversation cid))
(stop-when (message (delete-resource (conversation cid _ _ _))))
(on (message (update-resource (conversation cid $newtitle _ $newblurb)))
(title newtitle)
(blurb newblurb))))))
(supervise
(spawn #:name 'in-conversation-factory
(stop-when-reloaded)
(on (message (create-resource ($ i (in-conversation $cid $who))))
(spawn #:name i
(on-start (log-info "~s joins conversation ~a" who cid))
(on-stop (log-info "~s leaves conversation ~a" who cid))
(assert i)
(stop-when-duplicate i)
(stop-when (message (delete-resource i)))
(stop-when (message (delete-resource (conversation cid _ _ _))))))))
(supervise
(spawn #:name 'invitation-factory
(stop-when-reloaded)
(on (message (create-resource ($ i (invitation $cid $inviter $invitee))))
(spawn #:name i
(on-start (log-info "~s invited to conversation ~a by ~s" invitee cid inviter))
(on-stop (log-info "invitation of ~s to conversation ~a by ~s retracted"
invitee cid inviter))
(assert i)
(stop-when-duplicate i)
(stop-when (message (delete-resource i)))
(stop-when (message (delete-resource (conversation cid _ _ _))))
(stop-when (asserted (in-conversation cid invitee)))))))
(supervise
(spawn #:name 'post-factory
(stop-when-reloaded)
(on (message (create-resource
($ p0 (post $pid $timestamp $cid $author $items0))))
(spawn #:name p0
(field [items items0])
(define/dataflow p (post pid timestamp cid author (items)))
(assert (p))
(stop-when-duplicate (list 'post cid pid))
(stop-when (message (delete-resource (post pid _ cid _ _))))
(stop-when (message (delete-resource (conversation cid _ _ _))))
(on (message (update-resource (post pid _ cid _ $newitems)))
(items newitems))))))
(supervise
(spawn #:name 'conversation:questions
(stop-when-reloaded)
;; TODO: CHECK THE FOLLOWING: When the `invitation` vanishes (due to satisfaction
;; or rejection), this should remove the question from all eligible answerers at once
(during (invitation $cid $inviter $invitee)
;; `inviter` has invited `invitee` to conversation `cid`...
(define qid (random-hex-string 32)) ;; Fix qid and timestamp even as title/creator vary
(define timestamp (current-seconds))
(during (conversation cid $title $creator _)
;; ...and it exists...
(during (permitted invitee inviter (p:follow invitee) _)
;; ...and they are permitted to do so
(assert (question qid timestamp "q-invitation" invitee
(format "Invitation from ~a" inviter)
(with-output-to-string
(lambda ()
(display-xexpr
`(div
(p "You have been invited by " (b ,inviter)
" to join a conversation started by " (b ,creator) ".")
(p "The conversation is titled "
(i "\"" ,title "\"") ".")))))
(option-question (list (list "join" "Join conversation")
(list "decline" "Decline invitation")))))
(stop-when (asserted (answer qid $v))
(match v
["join"
(send! (create-resource (in-conversation cid invitee)))]
["decline"
(send! (delete-resource (invitation cid inviter invitee)))])))))))

15
examples/webchat/server/duplicate.rkt
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@ -1,15 +0,0 @@
#lang syndicate
(provide stop-when-duplicate)
(require syndicate/protocol/instance)
(require "util.rkt")
(define (stop-when-duplicate spec)
(define id (random-hex-string 16))
(assert (instance id spec))
(on (asserted (instance $id2 spec))
(when (string<? id id2)
(log-info "Duplicate instance of ~v detected; terminating" spec)
(stop-current-facet)))
id)

14
examples/webchat/server/main.rkt
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#lang syndicate
(require/activate syndicate/reload)
(spawn-reloader "config.rkt")
(spawn-reloader "trust.rkt")
(spawn-reloader "api.rkt")
(spawn-reloader "script-compiler.rkt")
(spawn-reloader "static-content.rkt")
(spawn-reloader "account.rkt")
(spawn-reloader "pages.rkt")
(spawn-reloader "qa.rkt")
(spawn-reloader "contacts.rkt")
(spawn-reloader "conversation.rkt")

277
examples/webchat/server/pages.rkt
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@ -1,277 +0,0 @@
#lang syndicate
(require racket/dict)
(require racket/port)
(require racket/set)
(require racket/string)
(require markdown)
(require net/url)
(require net/uri-codec)
(require/activate syndicate/reload)
(require/activate syndicate/supervise)
(require/activate syndicate/drivers/config)
(require/activate syndicate/drivers/smtp)
(require/activate syndicate/drivers/timestate)
(require/activate syndicate/drivers/web)
(require "protocol.rkt")
(require "duplicate.rkt")
(require "session-cookie.rkt")
(define (page #:head [extra-head '()]
#:body-id [body-id #f]
;; #:nav-heading [nav-heading `(a ((href "/#/conversations")) "Syndicate Webchat")]
title . body-elements)
`(html ((lang "en"))
(head (meta ((charset "utf-8")))
(meta ((http-equiv "X-UA-Compatible") (content "IE=edge")))
(meta ((name "viewport") (content "width=device-width, initial-scale=1.0, shrink-to-fit=no")))
(meta ((name "format-detection") (content "email=no"))) ;; TODO: Mobile chrome seems to autolink email addresses ?!?!
(title ,title)
(link ((rel "stylesheet")
(href "https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.5/css/bootstrap.min.css")
(integrity "sha384-AysaV+vQoT3kOAXZkl02PThvDr8HYKPZhNT5h/CXfBThSRXQ6jW5DO2ekP5ViFdi")
(crossorigin "anonymous")))
(script ((src "https://code.jquery.com/jquery-3.1.1.min.js")
(integrity "sha256-hVVnYaiADRTO2PzUGmuLJr8BLUSjGIZsDYGmIJLv2b8=")
(crossorigin "anonymous")))
(script ((src "https://cdnjs.cloudflare.com/ajax/libs/tether/1.3.8/js/tether.min.js")
(integrity "sha256-/5pHDZh2fv1eZImyfiThtB5Ag4LqDjyittT7fLjdT/8=")
(crossorigin "anonymous")))
(script ((src "https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.5/js/bootstrap.min.js")
(integrity "sha384-BLiI7JTZm+JWlgKa0M0kGRpJbF2J8q+qreVrKBC47e3K6BW78kGLrCkeRX6I9RoK")
(crossorigin "anonymous")))
(script ((src "https://cdnjs.cloudflare.com/ajax/libs/mustache.js/2.3.0/mustache.min.js")
(integrity "sha256-iaqfO5ue0VbSGcEiQn+OeXxnxAMK2+QgHXIDA5bWtGI=")
(crossorigin "anonymous")))
(script ((src "https://cdnjs.cloudflare.com/ajax/libs/blueimp-md5/2.6.0/js/md5.min.js")
(integrity "sha256-I0CACboBQ1ky299/4LVi2tzEhCOfx1e7LbCcFhn7M8Y=")
(crossorigin "anonymous")))
(script ((src "https://cdnjs.cloudflare.com/ajax/libs/immutable/3.8.1/immutable.min.js")
(integrity "sha256-13JFytp+tj8jsxr6GQOVLCgcYfMUo2Paw4jVrnXLUPE=")
(crossorigin "anonymous")))
(script ((src "/linkify.min.js")))
(script ((src "/linkify-string.min.js")))
;; (script ((src "/syndicatecompiler.min.js")))
(script ((src "/syndicate.min.js")))
(script ((src "/webchat.js")))
(link ((rel "stylesheet") (href "http://code.ionicframework.com/ionicons/2.0.1/css/ionicons.min.css")))
(link ((rel "stylesheet") (href "/style.css")))
,@extra-head)
(body (,@(if body-id
`((id ,body-id))
`()))
(div ((class "container main-container"))
(div ((class "header clearfix"))
(nav ((class "navbar"))
;; (span ((id "nav-heading") (class "navbar-brand text-muted")) ,nav-heading)
(ul ((id "nav-ul") (class "nav navbar-nav nav-pills float-xs-right"))
;; (li ((class "nav-item")) (a ((class "nav-link active") (href "#")) "Home " (span ((class "sr-only")) "(current)")))
;; (li ((class "nav-item")) (a ((class "nav-link") (href "#")) "About"))
;; (li ((class "nav-item")) (a ((class "nav-link") (href "#")) "Contact"))
)))
(div ((id "main-div")))
;; (div ((class "row marketing"))
;; (div ((class "col-lg-6"))
;; (h4 "Subheading")
;; (p "Donec id elit non mi porta gravida at eget metus. Maecenas faucibus mollis interdum.")
;; (h4 "Subheading")
;; (p "Morbi leo risus, porta ac consectetur ac, vestibulum at eros. Cras mattis consectetur purus sit amet fermentum.")
;; (h4 "Subheading")
;; (p "Maecenas sed diam eget risus varius blandit sit amet non magna."))
;; (div ((class "col-lg-6"))
;; (h4 "Subheading")
;; (p "Morbi leo risus, porta ac consectetur ac, vestibulum at eros. Cras mattis consectetur purus sit amet fermentum.")
;; (h4 "Subheading")
;; (p "Maecenas sed diam eget risus varius blandit sit amet non magna.")
;; (h4 "Subheading")
;; (p "Donec id elit non mi porta gravida at eget metus. Maecenas faucibus mollis interdum.")))
,@body-elements
(footer ((class "footer"))
(p copy " 2010" ndash "2016 Tony Garnock-Jones"))))))
(define (jumbotron heading . contents)
`(div ((class "jumbotron"))
(h1 ((class "display-3")) ,heading)
,@contents))
(define (logout-this-session! id)
(web-redirect! id "/" #:headers (list (format-cookie clear-session-cookie))))
(define (web-respond/pretty-xexpr! id
#:header [header (web-response-header)]
body-xexpr)
(web-respond/bytes! id
#:header header
(bytes-append #"<!DOCTYPE html>"
(with-output-to-bytes
(lambda ()
;; This is a very nice compromise pretty-printer
;; for xexprs from Greg's Markdown package.
(display-xexpr body-xexpr))))))
(spawn #:name 'index-page
(stop-when-reloaded)
(on (web-request-get (id req) _ ("" ()))
(index-page id)))
(define (index-page id)
(with-session id
[(email sid)
(serve-single-page-app id sid email)]
[else
(web-respond/pretty-xexpr!
id
#:header (web-response-header #:headers (list (format-cookie clear-session-cookie)))
(page "Syndicate Webchat"
(jumbotron "Log In"
`(p ((class "lead"))
"Enter your email address. You will be emailed a login token.")
`(form ((action "/login") (method "post") (class "form-inline"))
(div ((class "form-group"))
(label ((for "email")) "Email:")
" "
(input ((type "email")
(name "email")
(id "email")
(placeholder "your-email@example.com"))))
" "
(button ((type "submit")
(class "btn btn-success")
(role "button"))
"Log In")))))]))
(define (serve-single-page-app id sid email)
(web-respond/pretty-xexpr!
id
(page (format "Webchat: ~a" email)
#:body-id "webchat-main"
#:head (list `(meta ((itemprop "webchat-session-email") (content ,email)))
`(meta ((itemprop "webchat-session-id") (content ,sid)))))))
;; (define (sessions-page id)
;; (with-session id
;; [(email sid)
;; (define sids (sort (set->list (immediate-query (query-set (session email $s) s))) string<?))
;; (web-respond/pretty-xexpr!
;; id
;; (page "Session Management"
;; `(div (h1 "Session Management")
;; (ol ,@(for/list [(s sids)]
;; `(li (a ((href ,(format "/logout/~a" s)))
;; ,s))))
;; (p (a ((href "/logout-all"))
;; "Logout all sessions"))
;; (p (a ((href "/delete-account"))
;; "Delete account")))))]))
;; (define (logout-all-page id)
;; (with-session id
;; [(email _sid)
;; (for [(sid (immediate-query (query-set (session email $s) s)))]
;; (send! (end-session sid)))
;; (logout-this-session! id)]
;; [else (logout-this-session! id)]))
(spawn #:name 'logout-page
(stop-when-reloaded)
(on (web-request-get (id req) _ ("logout" ()))
(logout-page id)))
(define (logout-page id)
(with-session id
[(email sid)
(send! (end-session sid))
(logout-this-session! id)]
[else (logout-this-session! id)]))
(spawn #:name 'login-page
(stop-when-reloaded)
(define/query-value insecure #f (config _ (list 'insecure)) #t)
(define/query-value baseurl #f (server-baseurl $b) b)
(on (web-request-incoming (id req) _ 'post ("login" ()) $body)
(define params (make-immutable-hash (form-urlencoded->alist (bytes->string/utf-8 body))))
(define email (string-trim (dict-ref params 'email "")))
(if (string=? email "")
(web-redirect! id "/")
(let* ((sid (fresh-session-id))
(validation-url (url->string
(combine-url/relative (string->url (baseurl))
(format "/login/~a" sid)))))
(spawn-login-link email sid)
(login-link-emailed-page id (and (insecure) validation-url))
(when (not (insecure))
(smtp-deliver! 'smtp-service "webchat@syndicate-lang.org" (list email)
(list (cons 'subject "Login link for Syndicate WebChat")
(cons 'to email)
(cons 'from "webchat@syndicate-lang.org"))
(list (format "Hello ~a," email)
(format "")
(format "Here is your login link for Syndicate WebChat:")
(format "")
(format " ~a" validation-url))))))))
(define (spawn-login-link email sid)
(spawn #:name (list 'login-link email sid)
(on-start (log-info "Login link ~s for ~s activated." sid email))
(on-stop (log-info "Login link ~s for ~s deactivated." sid email))
(assert (login-link email sid))
(stop-when (asserted (session _ sid))) ;; happy path
(stop-when (message (end-session sid)))
(stop-when (message (delete-resource (account email))))
(stop-when-timeout (* (* 24 3600) 1000)))) ;; 24h = 1 day
(define (login-link-emailed-page id maybe-insecure-validation-url)
(web-respond/pretty-xexpr!
id
(page "Syndicate Webchat"
(jumbotron "Login Link Emailed"
(if maybe-insecure-validation-url
`(p ((class "insecure-mode lead"))
"INSECURE MODE: Click "
(a ((href ,maybe-insecure-validation-url)) "here")
" to log in")
`(p ((class "lead"))
"A login link should appear "
"in your inbox shortly."))))))
(spawn #:name 'login-link-page
(stop-when-reloaded)
;; Can't handle the request within each login-link process, since we have to take
;; special action if there is no such login link, and we are not allowed to race,
;; meaning that this has to be a Single Point Of Control for making decisions based
;; on the login-link relation.
(on (web-request-get (id req) _ ("login" (,$sid ())))
(match (immediate-query (query-value #f (login-link $email sid) email))
[#f (login-link-expired-page id)]
[email
(send! (create-resource (session email sid)))
(web-redirect! id "/" #:headers (list (format-cookie (session-id->cookie sid))))])))
(define (login-link-expired-page id)
(web-respond/pretty-xexpr!
id
(page "Login Link Expired or Invalid"
(jumbotron "Login Link Expired or Invalid"
`(p ((class "lead"))
"Please " (a ((href "/")) "return to the main page") ".")))))
(supervise
(spawn #:name 'session-monitor-factory
(stop-when-reloaded)
(on (message (create-resource ($ s (session $email $sid))))
(spawn #:name (list 'session-monitor email sid)
(on-start (log-info "Session ~s for ~s started." sid email))
(on-stop (log-info "Session ~s for ~s stopped." sid email))
(assert s)
(stop-when-duplicate s)
(stop-when (message (delete-resource s)))
(stop-when (message (delete-resource (account email))))
(stop-when (message (end-session sid)))
(stop-when-timeout (* 7 86400 1000)))))) ;; 1 week

173
examples/webchat/server/protocol.rkt
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@ -1,173 +0,0 @@
#lang racket/base
(provide (all-defined-out)) ;; TODO
;; A Markup is a String containing very carefully-chosen extensions
;; that allow a little bit of plain-text formatting without opening
;; the system up to Cross-Site Scripting (XSS) vulnerabilities.
;;---------------------------------------------------------------------------
;; Server State
;; (server-baseurl URLString)
(struct server-baseurl (string) #:prefab) ;; ASSERTION
;;---------------------------------------------------------------------------
;; Session and Account Management
;; (session EmailString String)
;; Represents a live session. Retracted when the session ends.
(struct session (email token) #:prefab) ;; ASSERTION
;; (login-link EmailString String)
;; Represents the availability of a non-expired login link. Retracted when the link expires.
(struct login-link (email token) #:prefab) ;; ASSERTION
;; (end-session String)
;; Instructs any matching session to terminate.
(struct end-session (token) #:prefab) ;; MESSAGE
;; (account EmailString)
;; Represents an extant account.
(struct account (email) #:prefab) ;; ASSERTION
;;---------------------------------------------------------------------------
;; API requests and assertions
;; (api Session Any)
;; Represents some value asserted or transmitted on behalf of the
;; given user session. Values of this type cannot be trusted, since
;; they originate with the user's client, which may be the browser or
;; may be some other client.
(struct api (session value) #:prefab) ;; ASSERTION AND MESSAGE
;;---------------------------------------------------------------------------
;; Create, Update and Delete
;; (create-resource Any)
;; Request creation of the given resource as described.
(struct create-resource (description) #:prefab) ;; MESSAGE
;; (update-resource Any)
;; Request update of the given resource as described.
(struct update-resource (description) #:prefab) ;; MESSAGE
;; (delete-resource Any)
;; Request deletion of the given resource as described.
(struct delete-resource (description) #:prefab) ;; MESSAGE
;;---------------------------------------------------------------------------
;; Capability Management
;; A Principal is an EmailString
;; TODO: Action: report a cap request as spam or some other kind of nuisance
;; (grant Principal Principal Principal Any Boolean)
;; Links in a grant chain.
(struct grant (issuer grantor grantee permission delegable?) #:prefab) ;; ASSERTION
;; (permitted Principal Principal Any Boolean)
;; Net results of processing grant chains. Query these.
(struct permitted (issuer email permission delegable?) #:prefab) ;; ASSERTION
;; (permission-request Principal Principal Any)
;; Represents an outstanding request for a permission.
;; Satisfied by either - appearance of a matching Grant
;; - receipt of a matching Revoke
;; - receipt of a CancelRequest
(struct permission-request (issuer grantee permission) #:prefab) ;; ASSERTION
;;---------------------------------------------------------------------------
;; Contact List Management
;; M Capability to invite X to a conversation
;; W Capability to see onlineness of X
;; W Capability to silently block X from contacting one in any way
;; W Capability to visibly block X from contacting one in any way
;; W Capability to mute an individual outside the context of any particular conversation for a certain length of time
;; (contact-list-entry Principal Principal)
;; Asserts that `member` is a member of the contact list owned by `owner`.
(struct contact-list-entry (owner member) #:prefab) ;; ASSERTION
;; (p:follow Principal)
;; When (permitted X Y (p:follow X) _), X says that Y may follow X.
(struct p:follow (email) #:prefab)
;; (struct p:invite (email) #:prefab)
;; (struct p:see-presence (email) #:prefab)
;;---------------------------------------------------------------------------
;; Conversation Management
;; M Capability to destroy a conversation
;; M Capability to invite someone inviteable to a conversation
;; M Capability to cancel an open invitation
;; M Capability to boot someone from a conversation
;; M Capability to leave a conversation
;; M Capability to reject an invitation to a conversation
;; M Capability to accept an invitation to a conversation
;; M Capability to see the list of participants in a conversation
;; M Capability to publish posts to a conversation
;; S Capability to remove or edit one's own posts
;; S Capability to remove or edit other people's posts
;; C Capability to clear conversation history
;; C Capability to react to a post on a conversation
;; W Capability to delegate capabilities to others
;; W Capability to mute a conversation for a certain length of time
;; W Capability to mute an individual within the context of a particular conversation for a certain length of time
;; W Capability to have a conversation joinable by ID, without an invitation
;; W Capability to have a conversation be publicly viewable
;; W Capability to draft posts before publication
;; W Capability to approve draft posts
;; TODO: For now, all members will have all conversation control
;; abilities. Later, these can be split out into separate permissions.
;; Attribute: conversation title
;; Attribute: conversation creator
;; Attribute: conversation blurb
;; Attribute: conversation members
;; Simple posting is a combination of draft+approve.
;; Flagging a post for moderator attention is a kind of reaction.
;; (conversation String String Principal Markup Boolean
(struct conversation (id title creator blurb) #:prefab) ;; ASSERTION
;; (invitation String Principal Principal)
(struct invitation (conversation-id inviter invitee) #:prefab) ;; ASSERTION
;; (in-conversation String Principal)
;; Records conversation membership.
(struct in-conversation (conversation-id member) #:prefab) ;; ASSERTION
(struct post (id ;; String
timestamp ;; Seconds
conversation-id ;; String
author ;; Principal
items ;; Listof DataURLString
) #:prefab) ;; ASSERTION
;;---------------------------------------------------------------------------
;; User Interaction
;; (ui-template String String)
;; A fragment of HTML for use in the web client.
(struct ui-template (name data) #:prefab) ;; ASSERTION
;; (question String Seconds String Principal String Markup QuestionType)
(struct question (id timestamp class target title blurb type) #:prefab) ;; ASSERTION
;; (answer String Any)
(struct answer (id value) #:prefab) ;; MESSAGE
;; A QuestionType is one of
;; - (yes/no-question Markup Markup)
;; - (option-question (Listof (List Any Markup)))
;; - (text-question Boolean)
(struct yes/no-question (false-value true-value) #:prefab)
(struct option-question (options) #:prefab)
(struct text-question (multiline?) #:prefab)
(struct acknowledge-question () #:prefab)

41
examples/webchat/server/qa.rkt
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@ -1,41 +0,0 @@
#lang syndicate
(provide ask-question!)
(require racket/port)
(require markdown)
(require/activate syndicate/reload)
(require/activate syndicate/supervise)
(require "protocol.rkt")
(require "util.rkt")
(supervise
(spawn #:name 'qa-relay
(stop-when-reloaded)
(during ($ q (question _ _ _ _ _ _ _))
(define qid (question-id q))
(define target (question-target q))
(assert (api (session target _) q))
(during (api (session target _) (answer qid $value))
(assert (answer qid value))))))
(define (ask-question! #:title title
#:blurb blurb
#:class [q-class "q-generic"]
#:target target
question-type)
(define qid (random-hex-string 32))
(define q (question qid
(current-seconds)
q-class
target
title
(with-output-to-string
(lambda ()
(display-xexpr blurb)))
question-type))
(assert q)
qid)

5
examples/webchat/server/run
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@ -1,5 +0,0 @@
#!/bin/sh
SYNDICATE_TRACE=${SYNDICATE_TRACE:-_}
SYNDICATE_STDOUT_TO_STDERR=y
export SYNDICATE_TRACE SYNDICATE_STDOUT_TO_STDERR
exec racketmake main.rkt -f testing.rktd 2>&1 | tai64n | tai64nlocal

25
examples/webchat/server/script-compiler.rkt
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@ -1,25 +0,0 @@
#lang syndicate
(require racket/file)
(require racket/port)
(require racket/system)
(require/activate syndicate/reload)
(require/activate syndicate/drivers/filesystem)
(require/activate syndicate/drivers/web)
(spawn #:name 'script-compiler
(stop-when-reloaded)
(define source-filename "../htdocs/webchat.syndicate.js")
(define target-filename "webchat.js")
(during/spawn (file-content source-filename file->bytes $bs)
#:name (list 'compiled source-filename)
(define compiled (with-output-to-bytes
(lambda () (system* "../../../js/bin/syndicatec" source-filename))))
(log-info "Finished compiling ~s" target-filename)
(on (web-request-get (id req) _ (,target-filename ()))
(web-respond/bytes! id
#:header (web-response-header
#:headers (list (cons 'content-type
"application/javascript")))
compiled))))

54
examples/webchat/server/session-cookie.rkt
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@ -1,54 +0,0 @@
#lang racket/base
(provide COOKIE
clear-session-cookie
format-cookie
fresh-session-id
session-id->cookie
with-session)
(require racket/list)
(require racket/match)
(require racket/set)
(require web-server/http/request-structs)
(require web-server/http/cookie)
(require syndicate/actor)
(require syndicate/drivers/web)
(require "protocol.rkt")
(require "util.rkt")
(define COOKIE "syndicatewebchat")
(define clear-session-cookie (make-cookie COOKIE
""
#:path "/"
#:expires "Thu, 01 Jan 1970 00:00:00 GMT"))
(define (format-cookie c)
(match-define (header field value) (cookie->header c))
(cons (string->symbol (string-downcase (bytes->string/latin-1 field)))
(bytes->string/utf-8 value)))
(define (fresh-session-id)
(random-hex-string 32))
(define (session-id->cookie sid)
(make-cookie COOKIE sid #:path "/"))
(define-syntax with-session
(syntax-rules (else)
[(_ id [(email sid) body ...])
(with-session id [(email sid) body ...] [else (web-redirect! id "/")])]
[(_ id [(email sid) body ...] [else no-session-body ...])
(let ()
(define (on-no-session)
no-session-body ...)
(match (immediate-query (query-value #f (web-request-cookie id COOKIE $v _ _) v))
[#f (on-no-session)]
[sid
(match (immediate-query (query-value #f (session $e sid) e))
[#f (on-no-session)]
[email
body ...])]))]))

45
examples/webchat/server/static-content.rkt
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#lang syndicate
(require racket/file)
(require racket/runtime-path)
(require net/url)
(require web-server/dispatchers/filesystem-map)
(require web-server/private/mime-types)
(require "protocol.rkt")
(require/activate syndicate/reload)
(require/activate syndicate/drivers/filesystem)
(require/activate syndicate/drivers/web)
(begin-for-declarations
(define-runtime-path htdocs-path "../htdocs")
(define-runtime-path templates-path "../htdocs/templates")
(define-runtime-path syndicate-js-dist-path "../../../js/dist")
(define path->mime-type (make-path->mime-type "/etc/mime.types")))
(spawn #:name 'static-content-server
(stop-when-reloaded)
(define static-paths (list htdocs-path syndicate-js-dist-path))
(define url->path-fns (map make-url->path static-paths))
(define (url->existing-static-path u)
(for/or [(url->path (in-list url->path-fns))]
(define-values (path path-pieces) (url->path u))
(and (file-exists? path) path)))
(on (web-request-get (id req) _ ,_)
(define path (url->existing-static-path
(resource->url (web-request-header-resource req))))
(when path
(web-respond/bytes! id
#:header (web-response-header #:mime-type (path->mime-type path))
(file->bytes path)))))
(spawn #:name 'template-server
(stop-when-reloaded)
(define url->path (make-url->path templates-path))
(during (api _ (observe (ui-template $name _)))
(define-values (path path-pieces) (url->path (string->url name)))
(on-start (log-info "Start observation of ~v" path))
(on-stop (log-info "Stop observation of ~v" path))
(during (file-content path file->string $data)
(assert (api _ (ui-template name data))))))

23
examples/webchat/server/testdata.rkt
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#lang syndicate
(require "protocol.rkt")
(send! (create-resource (account "tonyg@ccs.neu.edu")))
(send! (create-resource (account "me@here")))
(send! (create-resource (account "also@here")))
(define (follow! A B)
(send! (create-resource (grant A A B (p:follow A) #f)))
(send! (create-resource (grant B B A (p:follow B) #f))))
(follow! "tonyg@ccs.neu.edu" "me@here")
(follow! "also@here" "me@here")
(follow! "tonyg@ccs.neu.edu" "also@here")
(define (make-conversation! cid title creator . other-members)
(send! (create-resource (conversation cid title creator "")))
(for [(who (in-list (cons creator other-members)))]
(send! (create-resource (in-conversation cid who)))))
(make-conversation! "test" "Test Conversation" "tonyg@ccs.neu.edu" "me@here")
(make-conversation! "grouptest" "Group Conversation" "also@here" "me@here" "tonyg@ccs.neu.edu")

51
examples/webchat/server/trust.rkt
View File

@ -1,51 +0,0 @@
#lang syndicate
(require racket/set)
(require/activate syndicate/reload)
(require "protocol.rkt")
(require "duplicate.rkt")
(spawn #:name 'trust-inference
(stop-when-reloaded)
(during (grant $issuer $grantor $grantee $permission $delegable?)
(when (equal? issuer grantor)
(assert (permitted issuer grantee permission delegable?)))
(during (permitted issuer grantor permission #t)
(assert (permitted issuer grantee permission delegable?)))))
(spawn #:name 'grant-factory
(stop-when-reloaded)
(on (message (create-resource
($ g (grant $issuer $grantor $grantee $permission $delegable?))))
(spawn #:name g
(on-start (log-info "~s grants ~s ~v~a"
grantor grantee permission (if delegable? ", delegably" "")))
(on-stop (log-info "~s revokes~a grant of ~v to ~s"
grantor (if delegable? " delegable" "") permission grantee))
(assert g)
(stop-when-duplicate g)
(stop-when (message (delete-resource g)))
(stop-when (message
(delete-resource (permitted issuer grantee permission delegable?))))
(stop-when (message (delete-resource (account issuer))))
(stop-when (message (delete-resource (account grantor))))
(stop-when (message (delete-resource (account grantee)))))))
(spawn #:name 'request-factory
(stop-when-reloaded)
(on (message (create-resource ($ r (permission-request $the-issuer $grantee $permission))))
(spawn #:name r
(on-start (log-info "~s requests ~s from ~s" grantee permission the-issuer))
(assert r)
(stop-when-duplicate r)
(stop-when (message (delete-resource r))
(log-info "~s's request of ~s from ~s was cancelled or denied"
grantee permission the-issuer))
(stop-when (asserted (permitted the-issuer grantee permission $delegable?))
(log-info "~s's request of ~s from ~s was approved~a"
grantee
permission
the-issuer
(if delegable? ", delegably" ""))))))

9
examples/webchat/server/util.rkt
View File

@ -1,9 +0,0 @@
#lang racket/base
(provide random-hex-string)
(require (only-in file/sha1 bytes->hex-string))
(require (only-in racket/random crypto-random-bytes))
(define (random-hex-string half-length)
(bytes->hex-string (crypto-random-bytes half-length)))

0
LICENSE → hs/LICENSE
View File

4
hs/src/Syndicate/Dataspace/Trie/Prefix.hs
View File

@ -39,6 +39,8 @@ route ('<' : nc : s) (Br (os, w, _)) f =
Nothing -> route s (makeTail n w) f
route (x : s) (Br (_, w, h)) f = route s (Map.findWithDefault w x h) f
get w h x = Map.findWithDefault w x h
combine f leftEmpty rightEmpty r1 r2 = g r1 r2
where g (Ok v) r2 = f (Ok v) r2
g r1 (Ok v) = f r1 (Ok v)
@ -54,7 +56,7 @@ foldKeys g (Br (os1, w1, h1)) (Br (os2, w2, h2)) =
let o2 = Map.findWithDefault (makeTail size w2) size os2 in
let o = g o1 o2 in
if stripTail size o == Just w then acc else Map.insert size o acc
f x acc = update x (g (Map.findWithDefault w1 x h1) (Map.findWithDefault w2 x h2)) w acc
f x acc = update x (g (get w1 h1 x) (get w2 h2 x)) w acc
keys = Set.union (Map.keysSet h1) (Map.keysSet h2)
collapse (Br (os, Mt, h)) | Map.null os && Map.null h = empty

10
js/compiler/compiler.js
View File

@ -55,9 +55,9 @@ function buildActor(nameExpOpt, block, withReact) {
}
function reactWrap(blockCode) {
return '{ Syndicate.Actor.Facet.build(function () { ' +
return '{ Syndicate.Actor.Facet.build((function () { ' +
blockCode +
' }); }';
' }).bind(this)); }';
}
function buildOnEvent(isTerminal, eventType, subscription, projection, bindings, body) {
@ -86,10 +86,10 @@ function buildCaseEvent(eventPattern, body) {
}
var modifiedSourceActions = {
ActorStatement_noReact: function(_spawnStar, _namedOpt, nameExpOpt, block) {
ActorStatement_noReact: function(_actorStar, _namedOpt, nameExpOpt, block) {
return buildActor(nameExpOpt, block, false);
},
ActorStatement_withReact: function(_spawn, _namedOpt, nameExpOpt, block) {
ActorStatement_withReact: function(_actor, _namedOpt, nameExpOpt, block) {
return buildActor(nameExpOpt, block, true);
},
@ -197,7 +197,7 @@ var modifiedSourceActions = {
[],
'{}')) + '}');
},
ActorEndpointStatement_duringSpawn: function(_during, pattern, _spawn, _named, nameExpOpt, block)
ActorEndpointStatement_duringActor: function(_during, pattern, _actor, _named, nameExpOpt, block)
{
var cachedAssertionVar = gensym('cachedAssertion');
var actorBlock = {

59
js/compiler/demo-bad-this.js
View File

@ -1,59 +0,0 @@
// bin/syndicatec compiler/demo-bad-this.js | node
//
// Bug with this-ness. Symptomatic output:
//
// + render one false
// + render two false
// present one
// - render one false
// - render two false
// + render one one
// + render two one
//
// Good output:
//
// + render one false
// + render two false
// present one
// - render one false
// + render one one
var Syndicate = require('./src/main.js');
assertion type user(who);
assertion type present(who);
assertion type rendered(who, isPresent);
ground dataspace {
spawn {
assert user('one');
assert present('one');
}
spawn {
assert user('two');
// assert present('two');
}
spawn {
during user($who) {
field this.isPresent = false;
on asserted present(who) {
console.log('present', who);
this.isPresent = who;
}
on retracted present(who) {
console.log('absent', who);
this.isPresent = false;
}
assert rendered(who, this.isPresent);
}
}
spawn {
during rendered($who, $isPresent) {
on start { console.log('+ render', who, isPresent); }
on stop { console.log('- render', who, isPresent); }
}
}
}

6
js/compiler/demo-bankaccount.js
View File

@ -6,7 +6,7 @@ assertion type account(balance);
message type deposit(amount);
ground dataspace {
spawn {
actor {
field this.balance = 0;
assert account(this.balance);
dataflow {
@ -17,13 +17,13 @@ ground dataspace {
}
}
spawn {
actor {
on asserted account($balance) {
console.log("Balance is now", balance);
}
}
spawn {
actor {
on start {
console.log("Waiting for account.");
}

2
js/compiler/demo-during-criterion-snapshotting.js
View File

@ -19,7 +19,7 @@ var Dataspace = Syndicate.Dataspace;
assertion type foo(x, y);
ground dataspace {
spawn {
actor {
field this.x = 123;
assert foo(this.x, 999);

8
js/compiler/demo-filesystem.js
View File

@ -22,7 +22,7 @@ ground dataspace {
///////////////////////////////////////////////////////////////////////////
// The file system actor
spawn {
actor {
this.files = {};
during Syndicate.observe(file($name, _)) {
on start {
@ -44,7 +44,7 @@ ground dataspace {
///////////////////////////////////////////////////////////////////////////
// A simple demo client of the file system
spawn {
actor {
on asserted file("hello.txt", $content) {
console.log("hello.txt has content", JSON.stringify(content));
}
@ -54,14 +54,14 @@ ground dataspace {
}
}
spawn {
actor {
stop on asserted Syndicate.observe(saveFile(_, _)) {
:: saveFile("hello.txt", "a");
:: deleteFile("hello.txt");
:: saveFile("hello.txt", "c");
:: saveFile("hello.txt", "quit demo");
:: saveFile("hello.txt", "final contents");
spawn {
actor {
stop on asserted file("hello.txt", $content) {
console.log("second observer sees that hello.txt content is",
JSON.stringify(content));

10
js/compiler/demo-nested-during.js
View File

@ -59,7 +59,7 @@ assertion type show();
assertion type view(str);
ground dataspace {
spawn {
actor {
field this.title = "first";
assert todo(this.title);
on message 3 {
@ -67,11 +67,11 @@ ground dataspace {
}
}
spawn {
actor {
assert show();
}
spawn {
actor {
field this.editing = false;
during todo($title) {
@ -95,14 +95,14 @@ ground dataspace {
}
}
spawn {
actor {
on start { :: 0; }
stop on message 0 {
:: 1;
}
}
spawn {
actor {
field this.count = 0;
on retracted view($x) { console.log('VIEW--', x); }
on asserted view($x) {

6
js/compiler/demo-proper-interest-tracking.js
View File

@ -14,7 +14,7 @@ assertion type ready(what);
assertion type entry(key, val);
ground dataspace {
spawn named 'listener' {
actor named 'listener' {
assert ready('listener');
on asserted entry($key, _) {
console.log('key asserted', key);
@ -28,7 +28,7 @@ ground dataspace {
}
}
spawn named 'other-listener' {
actor named 'other-listener' {
assert ready('other-listener');
during entry($key, _) {
on start { console.log('(other-listener) key asserted', key); }
@ -50,7 +50,7 @@ ground dataspace {
}
}
spawn named 'driver' {
actor named 'driver' {
stop on asserted ready('listener') {
react {
stop on asserted ready('other-listener') {

55
js/compiler/demo-synthetic-patch-2.js
View File

@ -1,55 +0,0 @@
// bin/syndicatec compiler/demo-synthetic-patch-2.js | node
//
// Analogous example to syndicate/racket/syndicate/examples/actor/example-synthetic-patch-2.rkt.
//
// Symptomatic output:
//
// Outer value 4 = 4
// Value 0 = 0
// Value 1 = 1
// Value 2 = 2
// Value 3 = 3
//
// Correct output:
//
// Outer value 4 = 4
// Value 0 = 0
// Value 1 = 1
// Value 2 = 2
// Value 3 = 3
// Value 4 = 4
// Value 5 = 5
var Syndicate = require('./src/main.js');
assertion type mapping(key, value);
assertion type ready();
ground dataspace {
spawn {
field this.ofInterest = 0;
during ready() {
on asserted mapping(this.ofInterest, $v) {
console.log("Value", this.ofInterest, "=", v);
this.ofInterest += 1;
}
}
on asserted mapping(4, $v) {
console.log("Outer value", 4, "=", v);
}
}
spawn {
assert mapping(0, 0);
assert mapping(1, 1);
assert mapping(2, 2);
assert mapping(3, 3);
assert mapping(4, 4);
assert mapping(5, 5);
on start {
react {
assert ready();
}
}
}
}

10
js/compiler/syndicate.ohm
View File

@ -18,8 +18,8 @@ Syndicate <: ES5 {
FunctionBodyBlock = "{" FunctionBody "}" // odd that this isn't in es5.ohm somewhere
ActorStatement
= spawnStar (named Expression<withIn>)? FunctionBodyBlock -- noReact
| spawn (named Expression<withIn>)? FunctionBodyBlock -- withReact
= actorStar (named Expression<withIn>)? FunctionBodyBlock -- noReact
| actor (named Expression<withIn>)? FunctionBodyBlock -- withReact
DataspaceStatement
= ground dataspace identifier? FunctionBodyBlock -- ground
@ -38,7 +38,7 @@ Syndicate <: ES5 {
| stop on FacetTransitionEventPattern #(sc) -- stopOnNoCont
| dataflow FunctionBodyBlock -- dataflow
| during FacetPattern FunctionBodyBlock -- during
| during FacetPattern spawn (named Expression<withIn>)? FunctionBodyBlock -- duringSpawn
| during FacetPattern actor (named Expression<withIn>)? FunctionBodyBlock -- duringActor
AssertWhenClause = when "(" Expression<withIn> ")"
@ -69,8 +69,8 @@ Syndicate <: ES5 {
// we don't want to make them unavailable to programs as
// identifiers.
spawnStar = "spawn*" ~identifierPart
spawn = "spawn" ~("*" | identifierPart)
actorStar = "actor*" ~identifierPart
actor = "actor" ~("*" | identifierPart)
assert = "assert" ~identifierPart
asserted = "asserted" ~identifierPart
assertion = "assertion" ~identifierPart

2
js/examples/button/index.js
View File

@ -1,7 +1,7 @@
ground dataspace {
Syndicate.UI.spawnUIDriver();
spawn {
actor {
var ui = new Syndicate.UI.Anchor();
field this.counter = 0;
assert ui.html('#button-label', '' + this.counter);

6
js/examples/chat/index.js
View File

@ -15,7 +15,7 @@ function spawnChatApp() {
$("#nym_form").submit(function (e) { e.preventDefault(); return false; });
if (!($("#nym").val())) { $("#nym").val("nym" + Math.floor(Math.random() * 65536)); }
spawn {
actor {
var ui = new Syndicate.UI.Anchor();
field this.nym;
field this.status;
@ -82,8 +82,8 @@ function outputUtterance(who, what) {
assertion type inputValue(selector, value);
function spawnInputChangeMonitor() {
spawn {
during Syndicate.observe(inputValue($selector, _)) spawn {
actor {
during Syndicate.observe(inputValue($selector, _)) actor {
field this.value = $(selector).val();
assert inputValue(selector, this.value);
on message Syndicate.UI.globalEvent(selector, 'change', $e) {

7
js/examples/dom-webworker/Makefile
View File

@ -1,7 +0,0 @@
all: index.expanded.js worker.expanded.js
%.expanded.js: %.js
../../bin/syndicatec $< > $@ || (rm -f $@; false)
clean:
rm -f *.expanded.js

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