kris/sic.c

   1 /* ? 2005-2007 Anselm R. Garbe <garbeam at gmail dot com>
   2  * ? 2007 Kris Maglione <fbsdaemon@gmail.com>
   3  * ? 2005 Nico Golde <nico at ngolde dot de>
   4  * See LICENSE file for license details.
   5  */
   6 #include <ctype.h>
   7 #include <errno.h>
   8 #include <stdarg.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <time.h>
  13 #include <unistd.h>
  14
  15 #define nil ((void*)0)
  16 typedef unsigned short ushort;
  17
  18 #define PINGTIMEOUT 300
  19
  20 static char*    host = "irc.oftc.net";
  21 static ushort   port = 6667;
  22 static char*    password;
  23 static char     nick[32];
  24
  25 static char bufin[4096];
  26 static char bufout[4096];
  27 static char channel[256];
  28 static time_t trespond;
  29 static FILE *srv;
  30
  31 #include "util.c"
  32
  33 static void
  34 pout(char *channel, char *fmt, ...) {
  35         static char timestr[18];
  36         time_t t;
  37
  38         va_buf(bufout, fmt);
  39
  40         t = time(nil);
  41         strftime(timestr, sizeof timestr, "%D %R", localtime(&t));
  42         fprintf(stdout, "%-12s: %s %s\n", channel, timestr, bufout);
  43 }
  44
  45 static void
  46 sout(char *fmt, ...) {
  47         va_buf(bufout, fmt);
  48         fprintf(srv, "%s\r\n", bufout);
  49 }
  50
  51 static void
  52 privmsg(char *channel, char *msg) {
  53         if(channel[0] == '\0') {
  54                 pout("", "No channel to send to");
  55                 return;
  56         }
  57         pout(channel, "<%s> %s", nick, msg);
  58         sout("PRIVMSG %s :%s", channel, msg);
  59 }
  60
  61 static void
  62 parsein(char *msg) {
  63         char *p;
  64         char c;
  65
  66         if(msg[0] == '\0')
  67                 return;
  68         msg = ctok(&msg, '\n');
  69         if(msg[0] != ':') {
  70                 privmsg(channel, msg);
  71                 return;
  72         }
  73         c = *++msg;
  74         if(!c || !isspace(msg[1]))
  75                 sout("%s", msg);
  76         else {
  77                 if(msg[1])
  78                         msg += 2;
  79                 switch(c) {
  80                 case 'j':
  81                         sout("JOIN %s", msg);
  82                         if(channel[0] == '\0')
  83                                 strlcpy(channel, msg, sizeof channel);
  84                         break;
  85                 case 'l':
  86                         p = tok(&msg);
  87                         if(!*p)
  88                                 p = channel;
  89                         if(!*msg)
  90                                 msg = "sic - 250 LOC are too much!";
  91                         sout("PART %s :%s", p, msg);
  92                         break;
  93                 case 'm':
  94                         p = tok(&msg);
  95                         privmsg(p, msg);
  96                         break;
  97                 case 's':
  98                         strlcpy(channel, msg, sizeof channel);
  99                         break;
 100                 default:
 101                         sout("%c %s", c, msg);
 102                         break;
 103                 }
 104         }
 105 }
 106
 107 static void
 108 parsesrv(char *msg) {
 109         char *cmd, *p, *usr, *txt;
 110
 111         usr = host;
 112         if(!msg || !*msg)
 113                 return;
 114         if(msg[0] == ':') {
 115                 msg++;
 116                 p = tok(&msg);
 117                 if(!*msg)
 118                         return;
 119                 usr = ctok(&p, '!');
 120         }
 121         txt = ctok(&msg, '\r');
 122         msg = ctok(&txt, ':');
 123         cmd = tok(&msg);
 124         if(!strcmp("PONG", cmd))
 125                 return;
 126         if(!strcmp("PRIVMSG", cmd))
 127                 pout(msg, "<%s> %s", usr, txt);
 128         else if(!strcmp("PING", cmd))
 129                 sout("PONG %s", txt);
 130         else {
 131                 pout(usr, ">< %s: %s", cmd, txt);
 132                 if(!strcmp("NICK", cmd) && !strcmp(usr, nick))
 133                         strlcpy(nick, txt, sizeof nick);
 134         }
 135 }
 136
 137 int
 138 main(int argc, char *argv[]) {
 139         int i, c;
 140         struct timeval tv;
 141         fd_set rd;
 142
 143         strlcpy(nick, getenv("USER"), sizeof nick);
 144         for(i = 1; i < argc; i++) {
 145                 c = argv[i][1];
 146                 if(argv[i][0] != '-' || argv[i][2])
 147                         c = -1;
 148                 switch(c) {
 149                 case 'h':
 150                         if(++i < argc) host = argv[i];
 151                         break;
 152                 case 'p':
 153                         if(++i < argc) port = atoi(argv[i]);
 154                         break;
 155                 case 'n':
 156                         if(++i < argc) strlcpy(nick, argv[i], sizeof nick);
 157                         break;
 158                 case 'k':
 159                         if(++i < argc) password = argv[i];
 160                         break;
 161                 case 'v':
 162                         eprint("sic-"VERSION", ©2005-2009 Kris Maglione, Anselm R. Garbe, Nico Golde\n");
 163                 default:
 164                         eprint("usage: sic [-h host] [-p port] [-n nick] [-k keyword] [-v]\n");
 165                 }
 166         }
 167
 168         /* init */
 169         i = dial(host, port);
 170         srv = fdopen(i, "r+");
 171
 172         /* login */
 173         if(password)
 174                 sout("PASS %s", password);
 175         sout("NICK %s", nick);
 176         sout("USER %s localhost %s :%s", nick, host, nick);
 177         fflush(srv);
 178
 179         setbuf(stdout, nil);
 180         setbuf(srv, nil);
 181
 182         for(;;) { /* main loop */
 183                 FD_ZERO(&rd);
 184                 FD_SET(0, &rd);
 185                 FD_SET(fileno(srv), &rd);
 186                 tv.tv_sec = 120;
 187                 tv.tv_usec = 0;
 188                 i = select(fileno(srv) + 1, &rd, 0, 0, &tv);
 189                 if(i < 0) {
 190                         if(errno == EINTR)
 191                                 continue;
 192                         eprint("sic: error on select():");
 193                 }
 194                 else if(i == 0) {
 195                         if(time(nil) - trespond >= PINGTIMEOUT)
 196                                 eprint("sic shutting down: parse timeout\n");
 197                         sout("PING %s", host);
 198                         continue;
 199                 }
 200                 if(FD_ISSET(fileno(srv), &rd)) {
 201                         if(fgets(bufin, sizeof bufin, srv) == nil)
 202                                 eprint("sic: remote host closed connection\n");
 203                         parsesrv(bufin);
 204                         trespond = time(nil);
 205                 }
 206                 if(FD_ISSET(0, &rd)) {
 207                         if(fgets(bufin, sizeof bufin, stdin) == nil)
 208                                 eprint("sic: broken pipe\n");
 209                         parsein(bufin);
 210                 }
 211         }
 212         return 0;
 213 }
 214
 215