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irc_send.c
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irc_send.c
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/********************************************************************\
* 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.", irc->root->host,
PACKAGE, BITLBEE_VERSION);
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];
ssize_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;
if (irc->caps & CAP_EXTENDED_JOIN) {
irc_write(irc, ":%s!%s@%s JOIN %s * :%s", iu->nick, iu->user, iu->host, ic->name, iu->fullname);
} else {
irc_write(irc, ":%s!%s@%s JOIN :%s", iu->nick, iu->user, iu->host, ic->name);
}
if (iu == irc->user) {
if (ic->topic && *ic->topic) {
irc_send_topic(ic, FALSE);
}
irc_send_names(ic);
}
}
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 ? : "");
}
#define IRC_NAMES_LEN 385
void irc_send_names(irc_channel_t *ic)
{
GSList *l;
GString *namelist = g_string_sized_new(IRC_NAMES_LEN);
gboolean uhnames = (ic->irc->caps & CAP_USERHOST_IN_NAMES);
/* 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;
size_t extra_len = strlen(iu->nick);
char prefix;
if (uhnames) {
extra_len += strlen(iu->user) + strlen(iu->host) + 2;
}
if (namelist->len + extra_len > IRC_NAMES_LEN - 4) {
irc_send_num(ic->irc, 353, "= %s :%s", ic->name, namelist->str);
g_string_truncate(namelist, 0);
}
if ((prefix = irc_channel_user_get_prefix(icu))) {
g_string_append_c(namelist, prefix);
}
if (uhnames) {
g_string_append_printf(namelist, "%s!%s@%s ", iu->nick, iu->user, iu->host);
} else {
g_string_append(namelist, iu->nick);
g_string_append_c(namelist, ' ');
}
}
if (namelist->len) {
irc_send_num(ic->irc, 353, "= %s :%s", ic->name, namelist->str);
}
irc_send_num(ic->irc, 366, "%s :End of /NAMES list", ic->name);
g_string_free(namelist, TRUE);
}
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);
}
}
/* msg1 and msg2 are output parameters. If msg2 is non-null, msg1 is guaranteed to be non-null too.
The idea is to defer the formatting of "$msg1 ($msg2)" to later calls to avoid a g_strdup_printf() here. */
static void get_status_message(bee_user_t *bu, char **msg1, char **msg2)
{
*msg1 = NULL;
*msg2 = NULL;
if (!(bu->flags & BEE_USER_ONLINE)) {
*msg1 = "User is offline";
} else if ((bu->status && *bu->status) ||
(bu->status_msg && *bu->status_msg)) {
if (bu->status && bu->status_msg) {
*msg1 = bu->status;
*msg2 = bu->status_msg;
} else {
*msg1 = bu->status ? : bu->status_msg;
}
}
if (*msg1 && !**msg1) {
*msg1 = (bu->flags & BEE_USER_AWAY) ? "Away" : NULL;
}
}
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;
char *msg1, *msg2;
int num;
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);
num = (bu->flags & BEE_USER_AWAY || !(bu->flags & BEE_USER_ONLINE)) ? 301 : 320;
get_status_message(bu, &msg1, &msg2);
if (msg1 && msg2) {
irc_send_num(irc, num, "%s :%s (%s)", iu->nick, msg1, msg2);
} else if (msg1) {
irc_send_num(irc, num, "%s :%s", iu->nick, msg1);
}
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;
/* Null terminated string with three chars, respectively:
* { <H|G>, <@|%|+|\0>, \0 } */
char status_prefix[3] = {0};
if (is_channel) {
irc_channel_user_t *icu = l->data;
status_prefix[1] = irc_channel_user_get_prefix(icu);
iu = icu->iu;
} else {
iu = l->data;
}
/* If this is the account nick, check configuration to see if away */
if (iu == irc->user) {
/* rfc1459 doesn't mention this: G means gone, H means here */
status_prefix[0] = set_getstr(&irc->b->set, "away") ? 'G' : 'H';
} else {
status_prefix[0] = iu->flags & IRC_USER_AWAY ? 'G' : 'H';
}
irc_send_num(irc, 352, "%s %s %s %s %s %s :0 %s",
is_channel ? channel : "*", iu->user, iu->host, irc->root->host,
iu->nick, status_prefix, 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);
}
void irc_send_cap(irc_t *irc, char *subcommand, char *body)
{
char *nick = irc->user->nick ? : "*";
irc_write(irc, ":%s CAP %s %s :%s", irc->root->host, nick, subcommand, body);
}
void irc_send_away_notify(irc_user_t *iu)
{
bee_user_t *bu = iu->bu;
if (!bu) {
return;
}
if (bu->flags & BEE_USER_AWAY || !(bu->flags & BEE_USER_ONLINE)) {
char *msg1, *msg2;
get_status_message(bu, &msg1, &msg2);
if (msg2) {
irc_write(iu->irc, ":%s!%s@%s AWAY :%s (%s)", iu->nick, iu->user, iu->host, msg1, msg2);
} else {
irc_write(iu->irc, ":%s!%s@%s AWAY :%s", iu->nick, iu->user, iu->host, msg1);
}
} else {
irc_write(iu->irc, ":%s!%s@%s AWAY", iu->nick, iu->user, iu->host);
}
}