source: irc_send.c @ eabe6d4

  /********************************************************************\
  * BitlBee -- An IRC to other IM-networks gateway                     *
  *                                                                    *
  * Copyright 2002-2012 Wilmer van der Gaast and others                *
  \********************************************************************/

/* The IRC-based UI - Sending responses to commands/etc.                */

/*
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 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 General Public License for more details.

  You should have received a copy of the GNU General Public License with
  the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL;
  if not, write to the Free Software Foundation, Inc., 51 Franklin St.,
  Fifth Floor, Boston, MA  02110-1301  USA
*/

#include "bitlbee.h"

void irc_send_num( irc_t *irc, int code, char *format, ... )
{
        char text[IRC_MAX_LINE];
        va_list params;
        
        va_start( params, format );
        g_vsnprintf( text, IRC_MAX_LINE, format, params );
        va_end( params );
        
        irc_write( irc, ":%s %03d %s %s", irc->root->host, code, irc->user->nick ? : "*", text );
}

void irc_send_login( irc_t *irc )
{
        irc_send_num( irc,   1, ":Welcome to the %s gateway, %s", PACKAGE, irc->user->nick );
        irc_send_num( irc,   2, ":Host %s is running %s %s %s/%s.", irc->root->host,
                                PACKAGE, BITLBEE_VERSION, ARCH, CPU );
        irc_send_num( irc,   3, ":%s", IRCD_INFO );
        irc_send_num( irc,   4, "%s %s %s %s", irc->root->host, BITLBEE_VERSION, UMODES UMODES_PRIV, CMODES );
        irc_send_num( irc,   5, "PREFIX=(ohv)@%%+ CHANTYPES=%s CHANMODES=,,,%s NICKLEN=%d CHANNELLEN=%d "
                                "NETWORK=BitlBee SAFELIST CASEMAPPING=rfc1459 MAXTARGETS=1 WATCH=128 "
                                "FLOOD=0/9999 :are supported by this server",
                                CTYPES, CMODES, MAX_NICK_LENGTH - 1, MAX_NICK_LENGTH - 1 );
        irc_send_motd( irc );
}

void irc_send_motd( irc_t *irc )
{
        char motd[2048];
        size_t len;
        int fd;
        
        fd = open( global.conf->motdfile, O_RDONLY );
        if( fd == -1 || ( len = read( fd, motd, sizeof( motd ) - 1 ) ) <= 0 )
        {
                irc_send_num( irc, 422, ":We don't need MOTDs." );
        }
        else
        {
                char linebuf[80];
                char *add = "", max, *in;
                
                in = motd;
                motd[len] = '\0';
                linebuf[79] = len = 0;
                max = sizeof( linebuf ) - 1;
                
                irc_send_num( irc, 375, ":- %s Message Of The Day - ", irc->root->host );
                while( ( linebuf[len] = *(in++) ) )
                {
                        if( linebuf[len] == '\n' || len == max )
                        {
                                linebuf[len] = 0;
                                irc_send_num( irc, 372, ":- %s", linebuf );
                                len = 0;
                        }
                        else if( linebuf[len] == '%' )
                        {
                                linebuf[len] = *(in++);
                                if( linebuf[len] == 'h' )
                                        add = irc->root->host;
                                else if( linebuf[len] == 'v' )
                                        add = BITLBEE_VERSION;
                                else if( linebuf[len] == 'n' )
                                        add = irc->user->nick;
                                else if( linebuf[len] == '\0' )
                                        in --;
                                else
                                        add = "%";
                                
                                strncpy( linebuf + len, add, max - len );
                                while( linebuf[++len] );
                        }
                        else if( len < max )
                        {
                                len ++;
                        }
                }
                irc_send_num( irc, 376, ":End of MOTD" );
        }
        
        if( fd != -1 )
                close( fd );
}

/* Used by some funcs that generate PRIVMSGs to figure out if we're talking to
   this person in /query or in a control channel. WARNING: callers rely on
   this returning a pointer at irc->user_nick, not a copy of it. */
const char *irc_user_msgdest( irc_user_t *iu )
{
        irc_t *irc = iu->irc;
        irc_channel_t *ic = NULL;

        if( iu->last_channel )
        {
                if( iu->last_channel->flags & IRC_CHANNEL_JOINED )
                        ic = iu->last_channel;
                else
                        ic = irc_channel_with_user( irc, iu );
        }
        
        if( ic )
                return ic->name;
        else
                return irc->user->nick;
}

/* cmd = "PRIVMSG" or "NOTICE" */
static void irc_usermsg_( const char *cmd, irc_user_t *iu, const char *format, va_list params )
{
        char text[2048];
        const char *dst;
        
        g_vsnprintf( text, sizeof( text ), format, params );
        
        dst = irc_user_msgdest( iu );
        irc_send_msg( iu, cmd, dst, text, NULL );
}

void irc_usermsg(irc_user_t *iu, char *format, ... )
{
        va_list params;
        va_start( params, format );
        irc_usermsg_( "PRIVMSG", iu, format, params );
        va_end( params );
}

void irc_usernotice(irc_user_t *iu, char *format, ... )
{
        va_list params;
        va_start( params, format );
        irc_usermsg_( "NOTICE", iu, format, params );
        va_end( params );
}

void irc_rootmsg( irc_t *irc, char *format, ... )
{
        va_list params;
        va_start( params, format );
        irc_usermsg_( "PRIVMSG", irc->root, format, params );
        va_end( params );
}

void irc_send_join( irc_channel_t *ic, irc_user_t *iu )
{
        irc_t *irc = ic->irc;
        
        irc_write( irc, ":%s!%s@%s JOIN :%s", iu->nick, iu->user, iu->host, ic->name );
        
        if( iu == irc->user )
        {
                irc_write( irc, ":%s MODE %s +%s", irc->root->host, ic->name, ic->mode );
                irc_send_names( ic );
                if( ic->topic && *ic->topic )
                        irc_send_topic( ic, FALSE );
        }
}

void irc_send_part( irc_channel_t *ic, irc_user_t *iu, const char *reason )
{
        irc_write( ic->irc, ":%s!%s@%s PART %s :%s", iu->nick, iu->user, iu->host, ic->name, reason ? : "" );
}

void irc_send_quit( irc_user_t *iu, const char *reason )
{
        irc_write( iu->irc, ":%s!%s@%s QUIT :%s", iu->nick, iu->user, iu->host, reason ? : "" );
}

void irc_send_kick( irc_channel_t *ic, irc_user_t *iu, irc_user_t *kicker, const char *reason )
{
        irc_write( ic->irc, ":%s!%s@%s KICK %s %s :%s", kicker->nick, kicker->user,
                   kicker->host, ic->name, iu->nick, reason ? : "" );
}

void irc_send_names( irc_channel_t *ic )
{
        GSList *l;
        char namelist[385] = "";
        
        /* RFCs say there is no error reply allowed on NAMES, so when the
           channel is invalid, just give an empty reply. */
        for( l = ic->users; l; l = l->next )
        {
                irc_channel_user_t *icu = l->data;
                irc_user_t *iu = icu->iu;
                
                if( strlen( namelist ) + strlen( iu->nick ) > sizeof( namelist ) - 4 )
                {
                        irc_send_num( ic->irc, 353, "= %s :%s", ic->name, namelist );
                        *namelist = 0;
                }
                
                if( icu->flags & IRC_CHANNEL_USER_OP )
                        strcat( namelist, "@" );
                else if( icu->flags & IRC_CHANNEL_USER_HALFOP )
                        strcat( namelist, "%" );
                else if( icu->flags & IRC_CHANNEL_USER_VOICE )
                        strcat( namelist, "+" );
                
                strcat( namelist, iu->nick );
                strcat( namelist, " " );
        }
        
        if( *namelist )
                irc_send_num( ic->irc, 353, "= %s :%s", ic->name, namelist );
        
        irc_send_num( ic->irc, 366, "%s :End of /NAMES list", ic->name );
}

void irc_send_topic( irc_channel_t *ic, gboolean topic_change )
{
        if( topic_change && ic->topic_who )
        {
                irc_write( ic->irc, ":%s TOPIC %s :%s", ic->topic_who, 
                           ic->name, ic->topic && *ic->topic ? ic->topic : "" );
        }
        else if( ic->topic )
        {
                irc_send_num( ic->irc, 332, "%s :%s", ic->name, ic->topic );
                if( ic->topic_who )
                        irc_send_num( ic->irc, 333, "%s %s %d",
                                      ic->name, ic->topic_who, (int) ic->topic_time );
        }
        else
                irc_send_num( ic->irc, 331, "%s :No topic for this channel", ic->name );
}

void irc_send_whois( irc_user_t *iu )
{
        irc_t *irc = iu->irc;
        
        irc_send_num( irc, 311, "%s %s %s * :%s",
                      iu->nick, iu->user, iu->host, iu->fullname );
        
        if( iu->bu )
        {
                bee_user_t *bu = iu->bu;
                
                irc_send_num( irc, 312, "%s %s.%s :%s network", iu->nick, bu->ic->acc->user,
                           bu->ic->acc->server && *bu->ic->acc->server ? bu->ic->acc->server : "",
                           bu->ic->acc->prpl->name );
                
                if( ( bu->status && *bu->status ) ||
                    ( bu->status_msg && *bu->status_msg ) )
                {
                        int num = bu->flags & BEE_USER_AWAY ? 301 : 320;
                        
                        if( bu->status && bu->status_msg )
                                irc_send_num( irc, num, "%s :%s (%s)", iu->nick, bu->status, bu->status_msg );
                        else
                                irc_send_num( irc, num, "%s :%s", iu->nick, bu->status ? : bu->status_msg );
                }
                else if( !( bu->flags & BEE_USER_ONLINE ) )
                {
                        irc_send_num( irc, 301, "%s :%s", iu->nick, "User is offline" );
                }
                
                if( bu->idle_time || bu->login_time )
                {
                        irc_send_num( irc, 317, "%s %d %d :seconds idle, signon time",
                                      iu->nick,
                                      bu->idle_time ? (int) ( time( NULL ) - bu->idle_time ) : 0,
                                      (int) bu->login_time );
                }
        }
        else
        {
                irc_send_num( irc, 312, "%s %s :%s", iu->nick, irc->root->host, IRCD_INFO );
        }
        
        irc_send_num( irc, 318, "%s :End of /WHOIS list", iu->nick );
}

void irc_send_who( irc_t *irc, GSList *l, const char *channel )
{
        gboolean is_channel = strchr( CTYPES, channel[0] ) != NULL;
        
        while( l )
        {
                irc_user_t *iu = l->data;
                if( is_channel )
                        iu = ((irc_channel_user_t*)iu)->iu;
                /* TODO(wilmer): Restore away/channel information here */
                irc_send_num( irc, 352, "%s %s %s %s %s %c :0 %s",
                              is_channel ? channel : "*", iu->user, iu->host, irc->root->host,
                              iu->nick, iu->flags & IRC_USER_AWAY ? 'G' : 'H',
                              iu->fullname );
                l = l->next;
        }
        
        irc_send_num( irc, 315, "%s :End of /WHO list", channel );
}

void irc_send_msg( irc_user_t *iu, const char *type, const char *dst, const char *msg, const char *prefix )
{
        char last = 0;
        const char *s = msg, *line = msg;
        char raw_msg[strlen(msg)+1024];
        
        while( !last )
        {
                if( *s == '\r' && *(s+1) == '\n' )
                        s++;
                if( *s == '\n' )
                {
                        last = s[1] == 0;
                }
                else
                {
                        last = s[0] == 0;
                }
                if( *s == 0 || *s == '\n' )
                {
                        if( g_strncasecmp( line, "/me ", 4 ) == 0 && ( !prefix || !*prefix ) &&
                            g_strcasecmp( type, "PRIVMSG" ) == 0 )
                        {
                                strcpy( raw_msg, "\001ACTION " );
                                strncat( raw_msg, line + 4, s - line - 4 );
                                strcat( raw_msg, "\001" );
                                irc_send_msg_raw( iu, type, dst, raw_msg );
                        }
                        else
                        {
                                *raw_msg = '\0';
                                if( prefix && *prefix )
                                        strcpy( raw_msg, prefix );
                                strncat( raw_msg, line, s - line );
                                irc_send_msg_raw( iu, type, dst, raw_msg );
                        }
                        line = s + 1;
                }
                s ++;
        }
}

void irc_send_msg_raw( irc_user_t *iu, const char *type, const char *dst, const char *msg )
{
        irc_write( iu->irc, ":%s!%s@%s %s %s :%s",
                   iu->nick, iu->user, iu->host, type, dst, msg && *msg ? msg : " " );
}

void irc_send_msg_f( irc_user_t *iu, const char *type, const char *dst, const char *format, ... )
{
        char text[IRC_MAX_LINE];
        va_list params;
        
        va_start( params, format );
        g_vsnprintf( text, IRC_MAX_LINE, format, params );
        va_end( params );
        
        irc_write( iu->irc, ":%s!%s@%s %s %s :%s",
                   iu->nick, iu->user, iu->host, type, dst, text );
}

void irc_send_nick( irc_user_t *iu, const char *new )
{
        irc_write( iu->irc, ":%s!%s@%s NICK %s",
                   iu->nick, iu->user, iu->host, new );
}

/* Send an update of a user's mode inside a channel, compared to what it was. */
void irc_send_channel_user_mode_diff( irc_channel_t *ic, irc_user_t *iu,
        irc_channel_user_flags_t old, irc_channel_user_flags_t new )
{
        char changes[3*(5+strlen(iu->nick))];
        char from[strlen(ic->irc->root->nick)+strlen(ic->irc->root->user)+strlen(ic->irc->root->host)+3];
        int n;
        
        *changes = '\0'; n = 0;
        if( ( old & IRC_CHANNEL_USER_OP ) != ( new & IRC_CHANNEL_USER_OP ) )
        {
                n ++;
                if( new & IRC_CHANNEL_USER_OP )
                        strcat( changes, "+o" );
                else
                        strcat( changes, "-o" );
        }
        if( ( old & IRC_CHANNEL_USER_HALFOP ) != ( new & IRC_CHANNEL_USER_HALFOP ) )
        {
                n ++;
                if( new & IRC_CHANNEL_USER_HALFOP )
                        strcat( changes, "+h" );
                else
                        strcat( changes, "-h" );
        }
        if( ( old & IRC_CHANNEL_USER_VOICE ) != ( new & IRC_CHANNEL_USER_VOICE ) )
        {
                n ++;
                if( new & IRC_CHANNEL_USER_VOICE )
                        strcat( changes, "+v" );
                else
                        strcat( changes, "-v" );
        }
        while( n )
        {
                strcat( changes, " " );
                strcat( changes, iu->nick );
                n --;
        }
        
        if( set_getbool( &ic->irc->b->set, "simulate_netsplit" ) )
                g_snprintf( from, sizeof( from ), "%s", ic->irc->root->host );
        else
                g_snprintf( from, sizeof( from ), "%s!%s@%s", ic->irc->root->nick,
                            ic->irc->root->user, ic->irc->root->host );
        
        if( *changes )
                irc_write( ic->irc, ":%s MODE %s %s", from, ic->name, changes );
}

void irc_send_invite( irc_user_t *iu, irc_channel_t *ic )
{
        irc_t *irc = iu->irc;
        
        irc_write( iu->irc, ":%s!%s@%s INVITE %s :%s",
                   iu->nick, iu->user, iu->host, irc->user->nick, ic->name );
}