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/*
irc.c : irssi
Copyright (C) 1999 Timo Sirainen
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 along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "module.h"
#include "modules.h"
#include "network.h"
#include "net-sendbuffer.h"
#include "rawlog.h"
#include "misc.h"
#include "irc-servers.h"
#include "irc-channels.h"
#include "servers-redirect.h"
char *current_server_event;
static int signal_default_event;
static int signal_server_event;
static int signal_server_incoming;
#ifdef BLOCKING_SOCKETS
# define MAX_SOCKET_READS 1
#else
# define MAX_SOCKET_READS 5
#endif
/* The core of the irc_send_cmd* functions. If `raw' is TRUE, the `cmd'
won't be checked at all if it's 512 bytes or not, or if it contains
line feeds or not. Use with extreme caution! */
void irc_send_cmd_full(IRC_SERVER_REC *server, const char *cmd,
int send_now, int immediate, int raw)
{
char str[513];
int len;
g_return_if_fail(server != NULL);
g_return_if_fail(cmd != NULL);
if (server->connection_lost)
return;
len = strlen(cmd);
server->cmdcount++;
if (!raw) {
/* check that we don't send any longer commands
than 510 bytes (2 bytes for CR+LF) */
strncpy(str, cmd, 510);
if (len > 510) len = 510;
str[len] = '\0';
cmd = str;
}
if (send_now) {
rawlog_output(server->rawlog, cmd);
server_redirect_command(server, cmd, server->redirect_next);
server->redirect_next = NULL;
}
if (!raw) {
/* Add CR+LF to command */
str[len++] = 13;
str[len++] = 10;
str[len] = '\0';
}
if (send_now) {
irc_server_send_data(server, cmd, len);
} else {
/* add to queue */
if (immediate) {
server->cmdqueue = g_slist_prepend(server->cmdqueue,
server->redirect_next);
server->cmdqueue = g_slist_prepend(server->cmdqueue,
g_strdup(cmd));
} else {
server->cmdqueue = g_slist_append(server->cmdqueue,
g_strdup(cmd));
server->cmdqueue = g_slist_append(server->cmdqueue,
server->redirect_next);
}
}
server->redirect_next = NULL;
}
/* Send command to IRC server */
void irc_send_cmd(IRC_SERVER_REC *server, const char *cmd)
{
GTimeVal now;
int send_now;
g_get_current_time(&now);
send_now = g_timeval_cmp(&now, &server->wait_cmd) >= 0 &&
(server->cmdcount < server->max_cmds_at_once ||
server->cmd_queue_speed <= 0);
irc_send_cmd_full(server, cmd, send_now, FALSE, FALSE);
}
/* Send command to IRC server */
void irc_send_cmdv(IRC_SERVER_REC *server, const char *cmd, ...)
{
va_list args;
char *str;
va_start(args, cmd);
str = g_strdup_vprintf(cmd, args);
irc_send_cmd(server, str);
g_free(str);
va_end(args);
}
/* Send command to server immediately bypassing all flood protections
and queues. */
void irc_send_cmd_now(IRC_SERVER_REC *server, const char *cmd)
{
g_return_if_fail(cmd != NULL);
irc_send_cmd_full(server, cmd, TRUE, TRUE, FALSE);
}
/* Send command to server putting it at the beginning of the queue of
commands to send -- it will go out as soon as possible in accordance
to the flood protection settings. */
void irc_send_cmd_first(IRC_SERVER_REC *server, const char *cmd)
{
g_return_if_fail(cmd != NULL);
irc_send_cmd_full(server, cmd, FALSE, TRUE, FALSE);
}
static char *split_nicks(const char *cmd, char **pre, char **nicks, char **post, int arg)
{
char *p;
*pre = g_strdup(cmd);
*post = *nicks = NULL;
for (p = *pre; *p != '\0'; p++) {
if (*p != ' ')
continue;
if (arg == 1) {
/* text after nicks */
*p++ = '\0';
while (*p == ' ') p++;
*post = p;
break;
}
/* find nicks */
while (p[1] == ' ') p++;
if (--arg == 1) {
*p = '\0';
*nicks = p+1;
}
}
return *pre;
}
void irc_send_cmd_split(IRC_SERVER_REC *server, const char *cmd,
int nickarg, int max_nicks)
{
char *str, *pre, *post, *nicks;
char **nicklist, **tmp;
GString *nickstr;
int count;
g_return_if_fail(server != NULL);
g_return_if_fail(cmd != NULL);
str = split_nicks(cmd, &pre, &nicks, &post, nickarg);
if (nicks == NULL) {
/* no nicks given? */
g_free(str);
return;
}
/* split the nicks */
nickstr = g_string_new(NULL);
nicklist = g_strsplit(nicks, ",", -1); count = 0;
tmp = nicklist;
for (;; tmp++) {
if (*tmp != NULL) {
g_string_append_printf(nickstr, "%s,", *tmp);
if (++count < max_nicks)
continue;
}
count = 0;
if (nickstr->len > 0)
g_string_truncate(nickstr, nickstr->len-1);
irc_send_cmdv(server, post == NULL ? "%s %s" : "%s %s %s",
pre, nickstr->str, post);
g_string_truncate(nickstr, 0);
if (*tmp == NULL || tmp[1] == NULL)
break;
}
g_strfreev(nicklist);
g_string_free(nickstr, TRUE);
g_free(str);
}
/* Get next parameter */
char *event_get_param(char **data)
{
char *pos;
g_return_val_if_fail(data != NULL, NULL);
g_return_val_if_fail(*data != NULL, NULL);
if (**data == ':') {
/* last parameter */
pos = *data;
*data += strlen(*data);
return pos+1;
}
pos = *data;
while (**data != '\0' && **data != ' ') (*data)++;
if (**data == ' ') *(*data)++ = '\0';
return pos;
}
/* Get count parameters from data */
char *event_get_params(const char *data, int count, ...)
{
char **str, *tmp, *duprec, *datad;
gboolean rest;
va_list args;
g_return_val_if_fail(data != NULL, NULL);
va_start(args, count);
duprec = datad = g_strdup(data);
rest = count & PARAM_FLAG_GETREST;
count = PARAM_WITHOUT_FLAGS(count);
while (count-- > 0) {
str = (char **) va_arg(args, char **);
if (count == 0 && rest) {
/* put the rest to last parameter */
tmp = *datad == ':' ? datad+1 : datad;
} else {
tmp = event_get_param(&datad);
}
if (str != NULL) *str = tmp;
}
va_end(args);
return duprec;
}
static void irc_server_event(IRC_SERVER_REC *server, const char *line,
const char *nick, const char *address)
{
const char *signal;
char *event, *args;
g_return_if_fail(line != NULL);
/* split event / args */
event = g_strconcat("event ", line, NULL);
args = strchr(event+6, ' ');
if (args != NULL) *args++ = '\0'; else args = "";
while (*args == ' ') args++;
g_strdown(event);
/* check if event needs to be redirected */
signal = server_redirect_get_signal(server, nick, event, args);
if (signal == NULL)
signal = event;
else
rawlog_redirect(server->rawlog, signal);
/* emit it */
current_server_event = event+6;
if (!signal_emit(signal, 4, server, args, nick, address))
signal_emit_id(signal_default_event, 4, server, line, nick, address);
current_server_event = NULL;
g_free(event);
}
static char *irc_parse_prefix(char *line, char **nick, char **address)
{
char *p;
*nick = *address = NULL;
/* :<nick> [["!" <user>] "@" <host>] SPACE */
if (*line != ':')
return line;
*nick = ++line; p = NULL;
while (*line != '\0' && *line != ' ') {
if (*line == '!' || *line == '@') {
p = line;
if (*line == '!')
break;
}
line++;
}
if (p != NULL) {
line = p;
*line++ = '\0';
*address = line;
while (*line != '\0' && *line != ' ')
line++;
}
if (*line == ' ') {
*line++ = '\0';
while (*line == ' ') line++;
}
return line;
}
/* Parse command line sent by server */
static void irc_parse_incoming_line(IRC_SERVER_REC *server, char *line)
{
char *nick, *address;
g_return_if_fail(server != NULL);
g_return_if_fail(line != NULL);
line = irc_parse_prefix(line, &nick, &address);
if (*line != '\0')
signal_emit_id(signal_server_event, 4, server, line, nick, address);
}
/* input function: handle incoming server messages */
static void irc_parse_incoming(SERVER_REC *server)
{
char *str;
int count;
int ret;
g_return_if_fail(server != NULL);
/* Some commands can send huge replies and irssi might handle them
too slowly, so read only a few times from the socket before
letting other tasks to run. */
count = 0;
server_ref(server);
while (!server->disconnected &&
(ret = net_sendbuffer_receive_line(server->handle, &str, count < MAX_SOCKET_READS)) > 0) {
rawlog_input(server->rawlog, str);
signal_emit_id(signal_server_incoming, 2, server, str);
if (server->connection_lost)
server_disconnect(server);
count++;
}
if (ret == -1) {
/* connection lost */
server->connection_lost = TRUE;
server_disconnect(server);
}
server_unref(server);
}
static void irc_init_server(IRC_SERVER_REC *server)
{
g_return_if_fail(server != NULL);
if (!IS_IRC_SERVER(server))
return;
server->readtag =
g_input_add(net_sendbuffer_handle(server->handle),
G_INPUT_READ,
(GInputFunction) irc_parse_incoming, server);
}
void irc_irc_init(void)
{
signal_add("server event", (SIGNAL_FUNC) irc_server_event);
signal_add("server connected", (SIGNAL_FUNC) irc_init_server);
signal_add("server incoming", (SIGNAL_FUNC) irc_parse_incoming_line);
current_server_event = NULL;
signal_default_event = signal_get_uniq_id("default event");
signal_server_event = signal_get_uniq_id("server event");
signal_server_incoming = signal_get_uniq_id("server incoming");
}
void irc_irc_deinit(void)
{
signal_remove("server event", (SIGNAL_FUNC) irc_server_event);
signal_remove("server connected", (SIGNAL_FUNC) irc_init_server);
signal_remove("server incoming", (SIGNAL_FUNC) irc_parse_incoming_line);
}
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