irc_send.c

   1   /********************************************************************\
   2   * BitlBee -- An IRC to other IM-networks gateway                     *
   3   *                                                                    *
   4   * Copyright 2002-2010 Wilmer van der Gaast and others                *
   5   \********************************************************************/
   6
   7 /* The IRC-based UI - Sending responses to commands/etc.                */
   8
   9 /*
  10   This program is free software; you can redistribute it and/or modify
  11   it under the terms of the GNU General Public License as published by
  12   the Free Software Foundation; either version 2 of the License, or
  13   (at your option) any later version.
  14
  15   This program is distributed in the hope that it will be useful,
  16   but WITHOUT ANY WARRANTY; without even the implied warranty of
  17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18   GNU General Public License for more details.
  19
  20   You should have received a copy of the GNU General Public License with
  21   the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL;
  22   if not, write to the Free Software Foundation, Inc., 59 Temple Place,
  23   Suite 330, Boston, MA  02111-1307  USA
  24 */
  25
  26 #include "bitlbee.h"
  27
  28 void irc_send_num( irc_t *irc, int code, char *format, ... )
  29 {
  30         char text[IRC_MAX_LINE];
  31         va_list params;
  32
  33         va_start( params, format );
  34         g_vsnprintf( text, IRC_MAX_LINE, format, params );
  35         va_end( params );
  36
  37         irc_write( irc, ":%s %03d %s %s", irc->root->host, code, irc->user->nick ? : "*", text );
  38 }
  39
  40 void irc_send_login( irc_t *irc )
  41 {
  42         irc_send_num( irc,   1, ":Welcome to the BitlBee gateway, %s", irc->user->nick );
  43         irc_send_num( irc,   2, ":Host %s is running BitlBee " BITLBEE_VERSION " " ARCH "/" CPU ".", irc->root->host );
  44         irc_send_num( irc,   3, ":%s", IRCD_INFO );
  45         irc_send_num( irc,   4, "%s %s %s %s", irc->root->host, BITLBEE_VERSION, UMODES UMODES_PRIV, CMODES );
  46         irc_send_num( irc,   5, "PREFIX=(ohv)@%%+ CHANTYPES=%s CHANMODES=,,,%s NICKLEN=%d CHANNELLEN=%d "
  47                                 "NETWORK=BitlBee SAFELIST CASEMAPPING=rfc1459 MAXTARGETS=1 WATCH=128 "
  48                                 "FLOOD=0/9999 :are supported by this server",
  49                                 CTYPES, CMODES, MAX_NICK_LENGTH - 1, MAX_NICK_LENGTH - 1 );
  50         irc_send_motd( irc );
  51 }
  52
  53 void irc_send_motd( irc_t *irc )
  54 {
  55         char motd[2048];
  56         size_t len;
  57         int fd;
  58
  59         fd = open( global.conf->motdfile, O_RDONLY );
  60         if( fd == -1 || ( len = read( fd, motd, sizeof( motd ) - 1 ) ) <= 0 )
  61         {
  62                 irc_send_num( irc, 422, ":We don't need MOTDs." );
  63         }
  64         else
  65         {
  66                 char linebuf[80];
  67                 char *add = "", max, *in;
  68
  69                 in = motd;
  70                 motd[len] = '\0';
  71                 linebuf[79] = len = 0;
  72                 max = sizeof( linebuf ) - 1;
  73
  74                 irc_send_num( irc, 375, ":- %s Message Of The Day - ", irc->root->host );
  75                 while( ( linebuf[len] = *(in++) ) )
  76                 {
  77                         if( linebuf[len] == '\n' || len == max )
  78                         {
  79                                 linebuf[len] = 0;
  80                                 irc_send_num( irc, 372, ":- %s", linebuf );
  81                                 len = 0;
  82                         }
  83                         else if( linebuf[len] == '%' )
  84                         {
  85                                 linebuf[len] = *(in++);
  86                                 if( linebuf[len] == 'h' )
  87                                         add = irc->root->host;
  88                                 else if( linebuf[len] == 'v' )
  89                                         add = BITLBEE_VERSION;
  90                                 else if( linebuf[len] == 'n' )
  91                                         add = irc->user->nick;
  92                                 else if( linebuf[len] == '\0' )
  93                                         in --;
  94                                 else
  95                                         add = "%";
  96
  97                                 strncpy( linebuf + len, add, max - len );
  98                                 while( linebuf[++len] );
  99                         }
 100                         else if( len < max )
 101                         {
 102                                 len ++;
 103                         }
 104                 }
 105                 irc_send_num( irc, 376, ":End of MOTD" );
 106         }
 107
 108         if( fd != -1 )
 109                 close( fd );
 110 }
 111
 112 /* Used by some funcs that generate PRIVMSGs to figure out if we're talking to
 113    this person in /query or in a control channel. WARNING: callers rely on
 114    this returning a pointer at irc->user_nick, not a copy of it. */
 115 const char *irc_user_msgdest( irc_user_t *iu )
 116 {
 117         irc_t *irc = iu->irc;
 118         irc_channel_t *ic = NULL;
 119
 120         if( iu->last_channel )
 121         {
 122                 if( iu->last_channel->flags & IRC_CHANNEL_JOINED )
 123                         ic = iu->last_channel;
 124                 else
 125                         ic = irc_channel_with_user( irc, iu );
 126         }
 127
 128         if( ic )
 129                 return ic->name;
 130         else
 131                 return irc->user->nick;
 132 }
 133
 134 /* cmd = "PRIVMSG" or "NOTICE" */
 135 static void irc_usermsg_( const char *cmd, irc_user_t *iu, const char *format, va_list params )
 136 {
 137         char text[2048];
 138         const char *dst;
 139
 140         g_vsnprintf( text, sizeof( text ), format, params );
 141
 142         dst = irc_user_msgdest( iu );
 143         irc_send_msg( iu, cmd, dst, text, NULL );
 144 }
 145
 146 void irc_usermsg(irc_user_t *iu, char *format, ... )
 147 {
 148         va_list params;
 149         va_start( params, format );
 150         irc_usermsg_( "PRIVMSG", iu, format, params );
 151         va_end( params );
 152 }
 153
 154 void irc_usernotice(irc_user_t *iu, char *format, ... )
 155 {
 156         va_list params;
 157         va_start( params, format );
 158         irc_usermsg_( "NOTICE", iu, format, params );
 159         va_end( params );
 160 }
 161
 162 void irc_rootmsg( irc_t *irc, char *format, ... )
 163 {
 164         va_list params;
 165         va_start( params, format );
 166         irc_usermsg_( "PRIVMSG", irc->root, format, params );
 167         va_end( params );
 168 }
 169
 170 void irc_send_join( irc_channel_t *ic, irc_user_t *iu )
 171 {
 172         irc_t *irc = ic->irc;
 173
 174         irc_write( irc, ":%s!%s@%s JOIN :%s", iu->nick, iu->user, iu->host, ic->name );
 175
 176         if( iu == irc->user )
 177         {
 178                 irc_write( irc, ":%s MODE %s +%s", irc->root->host, ic->name, ic->mode );
 179                 irc_send_names( ic );
 180                 if( ic->topic && *ic->topic )
 181                         irc_send_topic( ic, FALSE );
 182         }
 183 }
 184
 185 void irc_send_part( irc_channel_t *ic, irc_user_t *iu, const char *reason )
 186 {
 187         irc_write( ic->irc, ":%s!%s@%s PART %s :%s", iu->nick, iu->user, iu->host, ic->name, reason ? : "" );
 188 }
 189
 190 void irc_send_quit( irc_user_t *iu, const char *reason )
 191 {
 192         irc_write( iu->irc, ":%s!%s@%s QUIT :%s", iu->nick, iu->user, iu->host, reason ? : "" );
 193 }
 194
 195 void irc_send_kick( irc_channel_t *ic, irc_user_t *iu, irc_user_t *kicker, const char *reason )
 196 {
 197         irc_write( ic->irc, ":%s!%s@%s KICK %s %s :%s", kicker->nick, kicker->user,
 198                    kicker->host, ic->name, iu->nick, reason ? : "" );
 199 }
 200
 201 void irc_send_names( irc_channel_t *ic )
 202 {
 203         GSList *l;
 204         char namelist[385] = "";
 205
 206         /* RFCs say there is no error reply allowed on NAMES, so when the
 207            channel is invalid, just give an empty reply. */
 208         for( l = ic->users; l; l = l->next )
 209         {
 210                 irc_channel_user_t *icu = l->data;
 211                 irc_user_t *iu = icu->iu;
 212
 213                 if( strlen( namelist ) + strlen( iu->nick ) > sizeof( namelist ) - 4 )
 214                 {
 215                         irc_send_num( ic->irc, 353, "= %s :%s", ic->name, namelist );
 216                         *namelist = 0;
 217                 }
 218
 219                 if( icu->flags & IRC_CHANNEL_USER_OP )
 220                         strcat( namelist, "@" );
 221                 else if( icu->flags & IRC_CHANNEL_USER_HALFOP )
 222                         strcat( namelist, "%" );
 223                 else if( icu->flags & IRC_CHANNEL_USER_VOICE )
 224                         strcat( namelist, "+" );
 225
 226                 strcat( namelist, iu->nick );
 227                 strcat( namelist, " " );
 228         }
 229
 230         if( *namelist )
 231                 irc_send_num( ic->irc, 353, "= %s :%s", ic->name, namelist );
 232
 233         irc_send_num( ic->irc, 366, "%s :End of /NAMES list", ic->name );
 234 }
 235
 236 void irc_send_topic( irc_channel_t *ic, gboolean topic_change )
 237 {
 238         if( topic_change && ic->topic_who )
 239         {
 240                 irc_write( ic->irc, ":%s TOPIC %s :%s", ic->topic_who,
 241                            ic->name, ic->topic && *ic->topic ? ic->topic : "" );
 242         }
 243         else if( ic->topic )
 244         {
 245                 irc_send_num( ic->irc, 332, "%s :%s", ic->name, ic->topic );
 246                 if( ic->topic_who )
 247                         irc_send_num( ic->irc, 333, "%s %s %d",
 248                                       ic->name, ic->topic_who, (int) ic->topic_time );
 249         }
 250         else
 251                 irc_send_num( ic->irc, 331, "%s :No topic for this channel", ic->name );
 252 }
 253
 254 void irc_send_whois( irc_user_t *iu )
 255 {
 256         irc_t *irc = iu->irc;
 257
 258         irc_send_num( irc, 311, "%s %s %s * :%s",
 259                       iu->nick, iu->user, iu->host, iu->fullname );
 260
 261         if( iu->bu )
 262         {
 263                 bee_user_t *bu = iu->bu;
 264
 265                 irc_send_num( irc, 312, "%s %s.%s :%s network", iu->nick, bu->ic->acc->user,
 266                            bu->ic->acc->server && *bu->ic->acc->server ? bu->ic->acc->server : "",
 267                            bu->ic->acc->prpl->name );
 268
 269                 if( ( bu->status && *bu->status ) ||
 270                     ( bu->status_msg && *bu->status_msg ) )
 271                 {
 272                         int num = bu->flags & BEE_USER_AWAY ? 301 : 320;
 273
 274                         if( bu->status && bu->status_msg )
 275                                 irc_send_num( irc, num, "%s :%s (%s)", iu->nick, bu->status, bu->status_msg );
 276                         else
 277                                 irc_send_num( irc, num, "%s :%s", iu->nick, bu->status ? : bu->status_msg );
 278                 }
 279                 else if( !( bu->flags & BEE_USER_ONLINE ) )
 280                 {
 281                         irc_send_num( irc, 301, "%s :%s", iu->nick, "User is offline" );
 282                 }
 283
 284                 if( bu->idle_time || bu->login_time )
 285                 {
 286                         irc_send_num( irc, 317, "%s %d %d :seconds idle, signon time",
 287                                       iu->nick,
 288                                       bu->idle_time ? (int) ( time( NULL ) - bu->idle_time ) : 0,
 289                                       (int) bu->login_time );
 290                 }
 291         }
 292         else
 293         {
 294                 irc_send_num( irc, 312, "%s %s :%s", iu->nick, irc->root->host, IRCD_INFO );
 295         }
 296
 297         irc_send_num( irc, 318, "%s :End of /WHOIS list", iu->nick );
 298 }
 299
 300 void irc_send_who( irc_t *irc, GSList *l, const char *channel )
 301 {
 302         gboolean is_channel = strchr( CTYPES, channel[0] ) != NULL;
 303
 304         while( l )
 305         {
 306                 irc_user_t *iu = l->data;
 307                 if( is_channel )
 308                         iu = ((irc_channel_user_t*)iu)->iu;
 309                 /* TODO(wilmer): Restore away/channel information here */
 310                 irc_send_num( irc, 352, "%s %s %s %s %s %c :0 %s",
 311                               is_channel ? channel : "*", iu->user, iu->host, irc->root->host,
 312                               iu->nick, iu->flags & IRC_USER_AWAY ? 'G' : 'H',
 313                               iu->fullname );
 314                 l = l->next;
 315         }
 316
 317         irc_send_num( irc, 315, "%s :End of /WHO list", channel );
 318 }
 319
 320 void irc_send_msg( irc_user_t *iu, const char *type, const char *dst, const char *msg, const char *prefix )
 321 {
 322         char last = 0;
 323         const char *s = msg, *line = msg;
 324         char raw_msg[strlen(msg)+1024];
 325
 326         while( !last )
 327         {
 328                 if( *s == '\r' && *(s+1) == '\n' )
 329                         s++;
 330                 if( *s == '\n' )
 331                 {
 332                         last = s[1] == 0;
 333                 }
 334                 else
 335                 {
 336                         last = s[0] == 0;
 337                 }
 338                 if( *s == 0 || *s == '\n' )
 339                 {
 340                         if( g_strncasecmp( line, "/me ", 4 ) == 0 && ( !prefix || !*prefix ) &&
 341                             g_strcasecmp( type, "PRIVMSG" ) == 0 )
 342                         {
 343                                 strcpy( raw_msg, "\001ACTION " );
 344                                 strncat( raw_msg, line + 4, s - line - 4 );
 345                                 strcat( raw_msg, "\001" );
 346                                 irc_send_msg_raw( iu, type, dst, raw_msg );
 347                         }
 348                         else
 349                         {
 350                                 *raw_msg = '\0';
 351                                 if( prefix && *prefix )
 352                                         strcpy( raw_msg, prefix );
 353                                 strncat( raw_msg, line, s - line );
 354                                 irc_send_msg_raw( iu, type, dst, raw_msg );
 355                         }
 356                         line = s + 1;
 357                 }
 358                 s ++;
 359         }
 360 }
 361
 362 void irc_send_msg_raw( irc_user_t *iu, const char *type, const char *dst, const char *msg )
 363 {
 364         irc_write( iu->irc, ":%s!%s@%s %s %s :%s",
 365                    iu->nick, iu->user, iu->host, type, dst, msg && *msg ? msg : " " );
 366 }
 367
 368 void irc_send_msg_f( irc_user_t *iu, const char *type, const char *dst, const char *format, ... )
 369 {
 370         char text[IRC_MAX_LINE];
 371         va_list params;
 372
 373         va_start( params, format );
 374         g_vsnprintf( text, IRC_MAX_LINE, format, params );
 375         va_end( params );
 376
 377         irc_write( iu->irc, ":%s!%s@%s %s %s :%s",
 378                    iu->nick, iu->user, iu->host, type, dst, text );
 379 }
 380
 381 void irc_send_nick( irc_user_t *iu, const char *new )
 382 {
 383         irc_write( iu->irc, ":%s!%s@%s NICK %s",
 384                    iu->nick, iu->user, iu->host, new );
 385 }
 386
 387 /* Send an update of a user's mode inside a channel, compared to what it was. */
 388 void irc_send_channel_user_mode_diff( irc_channel_t *ic, irc_user_t *iu,
 389         irc_channel_user_flags_t old, irc_channel_user_flags_t new )
 390 {
 391         char changes[3*(5+strlen(iu->nick))];
 392         char from[strlen(ic->irc->root->nick)+strlen(ic->irc->root->user)+strlen(ic->irc->root->host)+3];
 393         int n;
 394
 395         *changes = '\0'; n = 0;
 396         if( ( old & IRC_CHANNEL_USER_OP ) != ( new & IRC_CHANNEL_USER_OP ) )
 397         {
 398                 n ++;
 399                 if( new & IRC_CHANNEL_USER_OP )
 400                         strcat( changes, "+o" );
 401                 else
 402                         strcat( changes, "-o" );
 403         }
 404         if( ( old & IRC_CHANNEL_USER_HALFOP ) != ( new & IRC_CHANNEL_USER_HALFOP ) )
 405         {
 406                 n ++;
 407                 if( new & IRC_CHANNEL_USER_HALFOP )
 408                         strcat( changes, "+h" );
 409                 else
 410                         strcat( changes, "-h" );
 411         }
 412         if( ( old & IRC_CHANNEL_USER_VOICE ) != ( new & IRC_CHANNEL_USER_VOICE ) )
 413         {
 414                 n ++;
 415                 if( new & IRC_CHANNEL_USER_VOICE )
 416                         strcat( changes, "+v" );
 417                 else
 418                         strcat( changes, "-v" );
 419         }
 420         while( n )
 421         {
 422                 strcat( changes, " " );
 423                 strcat( changes, iu->nick );
 424                 n --;
 425         }
 426
 427         if( set_getbool( &ic->irc->b->set, "simulate_netsplit" ) )
 428                 g_snprintf( from, sizeof( from ), "%s", ic->irc->root->host );
 429         else
 430                 g_snprintf( from, sizeof( from ), "%s!%s@%s", ic->irc->root->nick,
 431                             ic->irc->root->user, ic->irc->root->host );
 432
 433         if( *changes )
 434                 irc_write( ic->irc, ":%s MODE %s %s", from, ic->name, changes );
 435 }
 436
 437 void irc_send_invite( irc_user_t *iu, irc_channel_t *ic )
 438 {
 439         irc_t *irc = iu->irc;
 440
 441         irc_write( iu->irc, ":%s!%s@%s INVITE %s :%s",
 442                    iu->nick, iu->user, iu->host, irc->user->nick, ic->name );
 443 }