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 #define va_buf(buf, fmt) {\
  32         va_list ap; \
  33         \
  34         va_start(ap, fmt); \
  35         vsnprintf(buf, sizeof buf, fmt, ap); \
  36         va_end(ap); \
  37 }
  38
  39 #include "util.c"
  40
  41 static void
  42 pout(char *channel, char *fmt, ...) {
  43         static char timestr[18];
  44         time_t t;
  45
  46         va_buf(bufout, fmt);
  47
  48         t = time(nil);
  49         strftime(timestr, sizeof timestr, "%D %R", localtime(&t));
  50         fprintf(stdout, "%-12s: %s %s\n", channel, timestr, bufout);
  51 }
  52
  53 static void
  54 sout(char *fmt, ...) {
  55         va_buf(bufout, fmt);
  56         fprintf(srv, "%s\r\n", bufout);
  57 }
  58
  59 static void
  60 privmsg(char *channel, char *msg) {
  61         if(channel[0] == '\0') {
  62                 pout("", "No channel to send to");
  63                 return;
  64         }
  65         pout(channel, "<%s> %s", nick, msg);
  66         sout("PRIVMSG %s :%s", channel, msg);
  67 }
  68
  69 static void
  70 parsein(char *msg) {
  71         char *p;
  72         char c;
  73
  74         if(msg[0] == '\0')
  75                 return;
  76         msg = ctok(&msg, '\n');
  77         if(msg[0] != ':') {
  78                 privmsg(channel, msg);
  79                 return;
  80         }
  81         c = *++msg;
  82         if(!c || !isspace(msg[1]))
  83                 sout("%s", msg);
  84         else {
  85                 if(msg[1])
  86                         msg += 2;
  87                 switch(c) {
  88                 case 'j':
  89                         sout("JOIN %s", msg);
  90                         if(channel[0] == '\0')
  91                                 strlcpy(channel, msg, sizeof channel);
  92                         break;
  93                 case 'l':
  94                         p = tok(&msg);
  95                         if(!*p)
  96                                 p = channel;
  97                         if(!*msg)
  98                                 msg = "sic - 250 LOC are too much!";
  99                         sout("PART %s :%s", p, msg);
 100                         break;
 101                 case 'm':
 102                         p = tok(&msg);
 103                         privmsg(p, msg);
 104                         break;
 105                 case 's':
 106                         strlcpy(channel, msg, sizeof channel);
 107                         break;
 108                 default:
 109                         sout("%c %s", c, msg);
 110                         break;
 111                 }
 112         }
 113 }
 114
 115 static void
 116 parsesrv(char *msg) {
 117         char *cmd, *p, *usr, *txt;
 118
 119         usr = host;
 120         if(!msg || !*msg)
 121                 return;
 122         if(msg[0] == ':') {
 123                 msg++;
 124                 p = tok(&msg);
 125                 if(!*msg)
 126                         return;
 127                 usr = ctok(&p, '!');
 128         }
 129         txt = ctok(&msg, '\r');
 130         msg = ctok(&txt, ':');
 131         cmd = tok(&msg);
 132         if(!strcmp("PONG", cmd))
 133                 return;
 134         if(!strcmp("PRIVMSG", cmd))
 135                 pout(msg, "<%s> %s", usr, txt);
 136         else if(!strcmp("PING", cmd))
 137                 sout("PONG %s", txt);
 138         else {
 139                 pout(usr, ">< %s: %s", cmd, txt);
 140                 if(!strcmp("NICK", cmd) && !strcmp(usr, nick))
 141                         strlcpy(nick, txt, sizeof nick);
 142         }
 143 }
 144
 145 int
 146 main(int argc, char *argv[]) {
 147         int i, c;
 148         struct timeval tv;
 149         fd_set rd;
 150
 151         strlcpy(nick, getenv("USER"), sizeof nick);
 152         for(i = 1; i < argc; i++) {
 153                 c = argv[i][1];
 154                 if(argv[i][0] != '-' || argv[i][2])
 155                         c = -1;
 156                 switch(c) {
 157                 case 'h':
 158                         if(++i < argc) host = argv[i];
 159                         break;
 160                 case 'p':
 161                         if(++i < argc) port = atoi(argv[i]);
 162                         break;
 163                 case 'n':
 164                         if(++i < argc) strlcpy(nick, argv[i], sizeof nick);
 165                         break;
 166                 case 'k':
 167                         if(++i < argc) password = argv[i];
 168                         break;
 169                 case 'v':
 170                         eprint("sic-"VERSION", ? 2005-2007 Anselm R. Garbe, Nico Golde\n");
 171                 default:
 172                         eprint("usage: sic [-h host] [-p port] [-n nick] [-k keyword] [-v]\n");
 173                 }
 174         }
 175
 176         /* init */
 177         i = dial(host, port);
 178         srv = fdopen(i, "r+");
 179
 180         /* login */
 181         if(password)
 182                 sout("PASS %s", password);
 183         sout("NICK %s", nick);
 184         sout("USER %s localhost %s :%s", nick, host, nick);
 185         fflush(srv);
 186
 187         setbuf(stdout, nil);
 188         setbuf(srv, nil);
 189
 190         for(;;) { /* main loop */
 191                 FD_ZERO(&rd);
 192                 FD_SET(0, &rd);
 193                 FD_SET(fileno(srv), &rd);
 194                 tv.tv_sec = 120;
 195                 tv.tv_usec = 0;
 196                 i = select(fileno(srv) + 1, &rd, 0, 0, &tv);
 197                 if(i < 0) {
 198                         if(errno == EINTR)
 199                                 continue;
 200                         eprint("sic: error on select():");
 201                 }
 202                 else if(i == 0) {
 203                         if(time(nil) - trespond >= PINGTIMEOUT)
 204                                 eprint("sic shutting down: parse timeout\n");
 205                         sout("PING %s", host);
 206                         continue;
 207                 }
 208                 if(FD_ISSET(fileno(srv), &rd)) {
 209                         if(fgets(bufin, sizeof bufin, srv) == nil)
 210                                 eprint("sic: remote host closed connection\n");
 211                         parsesrv(bufin);
 212                         trespond = time(nil);
 213                 }
 214                 if(FD_ISSET(0, &rd)) {
 215                         if(fgets(bufin, sizeof bufin, stdin) == nil)
 216                                 eprint("sic: broken pipe\n");
 217                         parsein(bufin);
 218                 }
 219         }
 220         return 0;
 221 }
 222
 223