hexchat/src/common/inbound.c

/* X-Chat
 * Copyright (C) 1998 Peter Zelezny.
 *
 * 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 St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <time.h>

#ifdef WIN32
#include <io.h>
#else
#include <unistd.h>
#endif

#define WANTARPA
#define WANTDNS
#include "inet.h"

#include "hexchat.h"
#include "util.h"
#include "ignore.h"
#include "fe.h"
#include "modes.h"
#include "notify.h"
#include "outbound.h"
#include "inbound.h"
#include "server.h"
#include "servlist.h"
#include "text.h"
#include "ctcp.h"
#include "hexchatc.h"
#include "chanopt.h"


void
clear_channel (session *sess)
{
	if (sess->channel[0])
		strcpy (sess->waitchannel, sess->channel);
	sess->channel[0] = 0;
	sess->doing_who = FALSE;
	sess->done_away_check = FALSE;

	log_close (sess);

	if (sess->current_modes)
	{
		g_free (sess->current_modes);
		sess->current_modes = NULL;
	}

	if (sess->mode_timeout_tag)
	{
		fe_timeout_remove (sess->mode_timeout_tag);
		sess->mode_timeout_tag = 0;
	}

	fe_clear_channel (sess);
	userlist_clear (sess);
	fe_set_nonchannel (sess, FALSE);
	fe_set_title (sess);
}

void
set_topic (session *sess, char *topic, char *stripped_topic)
{
	/* The topic of dialogs are the users hostname which is logged is new */
	if (sess->type == SESS_DIALOG && (!sess->topic || strcmp(sess->topic, stripped_topic))
		&& sess->logfd != -1)
	{
		char tbuf[1024];
		g_snprintf (tbuf, sizeof (tbuf), "[%s has address %s]\n", sess->channel, stripped_topic);
		write (sess->logfd, tbuf, strlen (tbuf));
	}

	g_free (sess->topic);
	sess->topic = g_strdup (stripped_topic);
	fe_set_topic (sess, topic, stripped_topic);
}

static session *
find_session_from_nick (char *nick, server *serv)
{
	session *sess;
	GSList *list = sess_list;

	sess = find_dialog (serv, nick);
	if (sess)
		return sess;

	if (serv->front_session)
	{
		if (userlist_find (serv->front_session, nick))
			return serv->front_session;
	}

	if (current_sess && current_sess->server == serv)
	{
		if (userlist_find (current_sess, nick))
			return current_sess;
	}

	while (list)
	{
		sess = list->data;
		if (sess->server == serv)
		{
			if (userlist_find (sess, nick))
				return sess;
		}
		list = list->next;
	}
	return NULL;
}

static session *
inbound_open_dialog (server *serv, char *from,
							const message_tags_data *tags_data)
{
	session *sess;

	sess = new_ircwindow (serv, from, SESS_DIALOG, 0);
	/* for playing sounds */
	EMIT_SIGNAL_TIMESTAMP (XP_TE_OPENDIALOG, sess, NULL, NULL, NULL, NULL, 0,
								  tags_data->timestamp);

	return sess;
}

static void
inbound_make_idtext (server *serv, char *idtext, int max, int id)
{
	idtext[0] = 0;
	if (serv->have_idmsg || serv->have_accnotify)
	{
		if (id)
		{
			safe_strcpy (idtext, prefs.hex_irc_id_ytext, max);
		} else
		{
			safe_strcpy (idtext, prefs.hex_irc_id_ntext, max);
		}
		/* convert codes like %C,%U to the proper ones */
		check_special_chars (idtext, TRUE);
	}
}

void
inbound_privmsg (server *serv, char *from, char *ip, char *text, int id,
					  const message_tags_data *tags_data)
{
	session *sess;
	struct User *user;
	char idtext[64];
	gboolean nodiag = FALSE;

	sess = find_dialog (serv, from);

	if (sess || prefs.hex_gui_autoopen_dialog)
	{
		/*0=ctcp  1=priv will set hex_gui_autoopen_dialog=0 here is flud detected */
		if (!sess)
		{
			if (flood_check (from, ip, serv, current_sess, 1))
				/* Create a dialog session */
				sess = inbound_open_dialog (serv, from, tags_data);
			else
				sess = serv->server_session;
			if (!sess)
				return; /* ?? */
		}

		if (ip && ip[0])
			set_topic (sess, ip, ip);
		inbound_chanmsg (serv, NULL, NULL, from, text, FALSE, id, tags_data);
		return;
	}

	sess = find_session_from_nick (from, serv);
	if (!sess)
	{
		sess = serv->front_session;
		nodiag = TRUE; /* We don't want it to look like a normal message in front sess */
	}

	user = userlist_find (sess, from);
	if (user)
	{
		user->lasttalk = time (0);
		if (user->account)
			id = TRUE;
	}
	
	inbound_make_idtext (serv, idtext, sizeof (idtext), id);

	if (sess->type == SESS_DIALOG && !nodiag)
		EMIT_SIGNAL_TIMESTAMP (XP_TE_DPRIVMSG, sess, from, text, idtext, NULL, 0,
									  tags_data->timestamp);
	else
		EMIT_SIGNAL_TIMESTAMP (XP_TE_PRIVMSG, sess, from, text, idtext, NULL, 0, 
									  tags_data->timestamp);
}

/* used for Alerts section. Masks can be separated by commas and spaces. */

gboolean
alert_match_word (char *word, char *masks)
{
	char *p = masks;
	char endchar;
	int res;

	if (masks[0] == 0)
		return FALSE;

	while (1)
	{
		/* if it's a 0, space or comma, the word has ended. */
		if (*p == 0 || *p == ' ' || *p == ',')
		{
			endchar = *p;
			*p = 0;
			res = match (masks, word);
			*p = endchar;

			if (res)
				return TRUE;	/* yes, matched! */

			masks = p + 1;
			if (*p == 0)
				return FALSE;
		}
		p++;
	}
}

gboolean
alert_match_text (char *text, char *masks)
{
	unsigned char *p = text;
	unsigned char endchar;
	int res;

	if (masks[0] == 0)
		return FALSE;

	while (1)
	{
		if (*p >= '0' && *p <= '9')
		{
			p++;
			continue;
		}

		/* if it's RFC1459 <special>, it can be inside a word */
		switch (*p)
		{
		case '-': case '[': case ']': case '\\':
		case '`': case '^': case '{': case '}':
		case '_': case '|':
			p++;
			continue;
		}

		/* if it's a 0, space or comma, the word has ended. */
		if (*p == 0 || *p == ' ' || *p == ',' ||
			/* if it's anything BUT a letter, the word has ended. */
			 (!g_unichar_isalpha (g_utf8_get_char (p))))
		{
			endchar = *p;
			*p = 0;
			res = alert_match_word (text, masks);
			*p = endchar;

			if (res)
				return TRUE;	/* yes, matched! */

			text = p + g_utf8_skip [p[0]];
			if (*p == 0)
				return FALSE;
		}

		p += g_utf8_skip [p[0]];
	}
}

static int
is_hilight (char *from, char *text, session *sess, server *serv)
{
	if (alert_match_word (from, prefs.hex_irc_no_hilight))
		return 0;

	text = strip_color (text, -1, STRIP_ALL);

	if (alert_match_text (text, serv->nick) ||
		 alert_match_text (text, prefs.hex_irc_extra_hilight) ||
		 alert_match_word (from, prefs.hex_irc_nick_hilight))
	{
		g_free (text);
		if (sess != current_tab)
		{
			sess->nick_said = TRUE;
			lastact_update (sess);
		}
		fe_set_hilight (sess);
		return 1;
	}

	g_free (text);
	return 0;
}

void
inbound_action (session *sess, char *chan, char *from, char *ip, char *text,
					 int fromme, int id, const message_tags_data *tags_data)
{
	session *def = sess;
	server *serv = sess->server;
	struct User *user;
	char nickchar[2] = "\000";
	char idtext[64];
	int privaction = FALSE;

	if (!fromme)
	{
		if (is_channel (serv, chan))
		{
			sess = find_channel (serv, chan);
		} else
		{
			/* it's a private action! */
			privaction = TRUE;
			/* find a dialog tab for it */
			sess = find_dialog (serv, from);
			/* if non found, open a new one */
			if (!sess && prefs.hex_gui_autoopen_dialog)
			{
				/* but only if it wouldn't flood */
				if (flood_check (from, ip, serv, current_sess, 1))
					sess = inbound_open_dialog (serv, from, tags_data);
				else
					sess = serv->server_session;
			}
			if (!sess)
			{
				sess = find_session_from_nick (from, serv);
				/* still not good? */
				if (!sess)
					sess = serv->front_session;
			}
		}
	}

	if (!sess)
		sess = def;

	if (sess != current_tab)
	{
		if (fromme)
		{
			sess->msg_said = FALSE;
			sess->new_data = TRUE;
		} else
		{
			sess->msg_said = TRUE;
			sess->new_data = FALSE;
		}
		lastact_update (sess);
	}

	user = userlist_find (sess, from);
	if (user)
	{
		nickchar[0] = user->prefix[0];
		user->lasttalk = time (0);
		if (user->account)
			id = TRUE;
		if (user->me)
			fromme = TRUE;
	}

	inbound_make_idtext (serv, idtext, sizeof (idtext), id);

	if (!fromme && !privaction)
	{
		if (is_hilight (from, text, sess, serv))
		{
			EMIT_SIGNAL_TIMESTAMP (XP_TE_HCHANACTION, sess, from, text, nickchar,
										  idtext, 0, tags_data->timestamp);
			return;
		}
	}

	if (fromme)
		EMIT_SIGNAL_TIMESTAMP (XP_TE_UACTION, sess, from, text, nickchar, idtext,
									  0, tags_data->timestamp);
	else if (!privaction)
		EMIT_SIGNAL_TIMESTAMP (XP_TE_CHANACTION, sess, from, text, nickchar,
									  idtext, 0, tags_data->timestamp);
	else if (sess->type == SESS_DIALOG)
		EMIT_SIGNAL_TIMESTAMP (XP_TE_DPRIVACTION, sess, from, text, idtext, NULL,
									  0, tags_data->timestamp);
	else
		EMIT_SIGNAL_TIMESTAMP (XP_TE_PRIVACTION, sess, from, text, idtext, NULL, 0,
									  tags_data->timestamp);
}

void
inbound_chanmsg (server *serv, session *sess, char *chan, char *from, 
					  char *text, char fromme, int id, 
					  const message_tags_data *tags_data)
{
	struct User *user;
	int hilight = FALSE;
	char nickchar[2] = "\000";
	char idtext[64];

	if (!sess)
	{
		if (chan)
		{
			sess = find_channel (serv, chan);
			if (!sess && !is_channel (serv, chan))
				sess = find_dialog (serv, chan);
		} else
		{
			sess = find_dialog (serv, from);
		}
		if (!sess)
			return;
	}

	if (sess != current_tab)
	{
		sess->msg_said = TRUE;
		sess->new_data = FALSE;
		lastact_update (sess);
	}

	user = userlist_find (sess, from);
	if (user)
	{
		if (user->account)
			id = TRUE;
		nickchar[0] = user->prefix[0];
		user->lasttalk = time (0);
		if (user->me)
			fromme = TRUE;
	}

	if (fromme)
	{
		if (prefs.hex_away_auto_unmark && serv->is_away && !tags_data->timestamp)
			sess->server->p_set_back (sess->server);
		EMIT_SIGNAL_TIMESTAMP (XP_TE_UCHANMSG, sess, from, text, nickchar, NULL,
									  0, tags_data->timestamp);
		return;
	}

	inbound_make_idtext (serv, idtext, sizeof (idtext), id);

	if (is_hilight (from, text, sess, serv))
		hilight = TRUE;

	if (sess->type == SESS_DIALOG)
		EMIT_SIGNAL_TIMESTAMP (XP_TE_DPRIVMSG, sess, from, text, idtext, NULL, 0,
									  tags_data->timestamp);
	else if (hilight)
		EMIT_SIGNAL_TIMESTAMP (XP_TE_HCHANMSG, sess, from, text, nickchar, idtext,
									  0, tags_data->timestamp);
	else
		EMIT_SIGNAL_TIMESTAMP (XP_TE_CHANMSG, sess, from, text, nickchar, idtext,
									  0, tags_data->timestamp);
}

void
inbound_newnick (server *serv, char *nick, char *newnick, int quiet,
					  const message_tags_data *tags_data)
{
	int me = FALSE;
	session *sess;
	GSList *list = sess_list;

	if (!serv->p_cmp (nick, serv->nick))
	{
		me = TRUE;
		safe_strcpy (serv->nick, newnick, NICKLEN);
	}

	while (list)
	{
		sess = list->data;
		if (sess->server == serv)
		{
			if (userlist_change (sess, nick, newnick) || (me && sess->type == SESS_SERVER))
			{
				if (!quiet)
				{
					if (me)
						EMIT_SIGNAL_TIMESTAMP (XP_TE_UCHANGENICK, sess, nick, 
													  newnick, NULL, NULL, 0,
													  tags_data->timestamp);
					else
						EMIT_SIGNAL_TIMESTAMP (XP_TE_CHANGENICK, sess, nick,
													  newnick, NULL, NULL, 0, tags_data->timestamp);
				}
			}
			if (sess->type == SESS_DIALOG && !serv->p_cmp (sess->channel, nick))
			{
				safe_strcpy (sess->channel, newnick, CHANLEN);
				fe_set_channel (sess);
			}
			fe_set_title (sess);
		}
		list = list->next;
	}

	dcc_change_nick (serv, nick, newnick);

	if (me)
		fe_set_nick (serv, newnick);
}

/* find a "<none>" tab */
static session *
find_unused_session (server *serv)
{
	session *sess;
	GSList *list = sess_list;
	while (list)
	{
		sess = (session *) list->data;
		if (sess->type == SESS_CHANNEL && sess->channel[0] == 0 &&
			 sess->server == serv)
		{
			if (sess->waitchannel[0] == 0)
				return sess;
		}
		list = list->next;
	}
	return NULL;
}

static session *
find_session_from_waitchannel (char *chan, struct server *serv)
{
	session *sess;
	GSList *list = sess_list;
	while (list)
	{
		sess = (session *) list->data;
		if (sess->server == serv && sess->channel[0] == 0 && sess->type == SESS_CHANNEL)
		{
			if (!serv->p_cmp (chan, sess->waitchannel))
				return sess;
		}
		list = list->next;
	}
	return NULL;
}

void
inbound_ujoin (server *serv, char *chan, char *nick, char *ip,
					const message_tags_data *tags_data)
{
	session *sess;
	int found_unused = FALSE;

	/* already joined? probably a bnc */
	sess = find_channel (serv, chan);
	if (!sess)
	{
		/* see if a window is waiting to join this channel */
		sess = find_session_from_waitchannel (chan, serv);
		if (!sess)
		{
			/* find a "<none>" tab and use that */
			sess = find_unused_session (serv);
			found_unused = sess != NULL;
			if (!sess)
				/* last resort, open a new tab/window */
				sess = new_ircwindow (serv, chan, SESS_CHANNEL, 1);
		}
	}

	safe_strcpy (sess->channel, chan, CHANLEN);
	if (found_unused)
	{
		chanopt_load (sess);
		scrollback_load (sess);
		if (sess->scrollwritten && sess->scrollback_replay_marklast)
			sess->scrollback_replay_marklast (sess);
	}

	fe_set_channel (sess);
	fe_set_title (sess);
	fe_set_nonchannel (sess, TRUE);
	userlist_clear (sess);

	log_open_or_close (sess);

	sess->waitchannel[0] = 0;
	sess->ignore_date = TRUE;
	sess->ignore_mode = TRUE;
	sess->ignore_names = TRUE;
	sess->end_of_names = FALSE;

	/* sends a MODE */
	serv->p_join_info (sess->server, chan);

	EMIT_SIGNAL_TIMESTAMP (XP_TE_UJOIN, sess, nick, chan, ip, NULL, 0,
								  tags_data->timestamp);

	if (prefs.hex_irc_who_join)
	{
		/* sends WHO #channel */
		serv->p_user_list (sess->server, chan);
		sess->doing_who = TRUE;
	}
}

void
inbound_ukick (server *serv, char *chan, char *kicker, char *reason,
					const message_tags_data *tags_data)
{
	session *sess = find_channel (serv, chan);
	if (sess)
	{
		EMIT_SIGNAL_TIMESTAMP (XP_TE_UKICK, sess, serv->nick, chan, kicker, 
									  reason, 0, tags_data->timestamp);
		clear_channel (sess);
		if (prefs.hex_irc_auto_rejoin)
		{
			serv->p_join (serv, chan, sess->channelkey);
			safe_strcpy (sess->waitchannel, chan, CHANLEN);
		}
	}
}

void
inbound_upart (server *serv, char *chan, char *ip, char *reason,
					const message_tags_data *tags_data)
{
	session *sess = find_channel (serv, chan);
	if (sess)
	{
		if (*reason)
			EMIT_SIGNAL_TIMESTAMP (XP_TE_UPARTREASON, sess, serv->nick, ip, chan,
										  reason, 0, tags_data->timestamp);
		else
			EMIT_SIGNAL_TIMESTAMP (XP_TE_UPART, sess, serv->nick, ip, chan, NULL,
										  0, tags_data->timestamp);
		clear_channel (sess);
	}
}

void
inbound_nameslist (server *serv, char *chan, char *names,
						 const message_tags_data *tags_data)
{
	session *sess;
	char **name_list;
	char *host, *nopre_name;
	char name[NICKLEN];
	int i;
	size_t offset;

	sess = find_channel (serv, chan);
	if (!sess)
	{
		EMIT_SIGNAL_TIMESTAMP (XP_TE_USERSONCHAN, serv->server_session, chan,
									  names, NULL, NULL, 0, tags_data->timestamp);
		return;
	}
	if (!sess->ignore_names)
		EMIT_SIGNAL_TIMESTAMP (XP_TE_USERSONCHAN, sess, chan, names, NULL, NULL,
									  0, tags_data->timestamp);

	if (sess->end_of_names)
	{
		sess->end_of_names = FALSE;
		userlist_clear (sess);
	}

	name_list = g_strsplit (names, " ", -1);
	for (i = 0; name_list[i]; i++)
	{
		host = NULL;
		offset = sizeof(name);

		if (name_list[i][0] == 0)
			continue;

		if (serv->have_uhnames)
		{
			offset = 0;
			nopre_name = name_list[i];

			/* Ignore prefixes so '!' won't cause issues */
			while (strchr (serv->nick_prefixes, *nopre_name) != NULL)
			{
				nopre_name++;
				offset++;
			}

			offset += strcspn (nopre_name, "!");
			if (offset++ < strlen (name_list[i]))
				host = name_list[i] + offset;
		}

		g_strlcpy (name, name_list[i], MIN(offset, sizeof(name)));

		userlist_add (sess, name, host, NULL, NULL, tags_data);
	}
	g_strfreev (name_list);
}

void
inbound_topic (server *serv, char *chan, char *topic_text,
					const message_tags_data *tags_data)
{
	session *sess = find_channel (serv, chan);
	char *stripped_topic;

	if (sess)
	{
		stripped_topic = strip_color (topic_text, -1, STRIP_ALL);
		set_topic (sess, topic_text, stripped_topic);
		g_free (stripped_topic);
	} else
		sess = serv->server_session;

	EMIT_SIGNAL_TIMESTAMP (XP_TE_TOPIC, sess, chan, topic_text, NULL, NULL, 0,
								  tags_data->timestamp);
}

void
inbound_topicnew (server *serv, char *nick, char *chan, char *topic,
						const message_tags_data *tags_data)
{
	session *sess;
	char *stripped_topic;

	sess = find_channel (serv, chan);
	if (sess)
	{
		EMIT_SIGNAL_TIMESTAMP (XP_TE_NEWTOPIC, sess, nick, topic, chan, NULL, 0,
									  tags_data->timestamp);
		stripped_topic = strip_color (topic, -1, STRIP_ALL);
		set_topic (sess, topic, stripped_topic);
		g_free (stripped_topic);
	}
}

void
inbound_join (server *serv, char *chan, char *user, char *ip, char *account,
				  char *realname, const message_tags_data *tags_data)
{
	session *sess = find_channel (serv, chan);
	if (sess)
	{
		EMIT_SIGNAL_TIMESTAMP (XP_TE_JOIN, sess, user, chan, ip, account, 0,
									  tags_data->timestamp);
		userlist_add (sess, user, ip, account, realname, tags_data);
	}
}

void
inbound_kick (server *serv, char *chan, char *user, char *kicker, char *reason,
				  const message_tags_data *tags_data)
{
	session *sess = find_channel (serv, chan);
	if (sess)
	{
		EMIT_SIGNAL_TIMESTAMP (XP_TE_KICK, sess, kicker, user, chan, reason, 0,
									  tags_data->timestamp);
		userlist_remove (sess, user);
	}
}

void
inbound_part (server *serv, char *chan, char *user, char *ip, char *reason,
				  const message_tags_data *tags_data)
{
	session *sess = find_channel (serv, chan);
	if (sess)
	{
		if (*reason)
			EMIT_SIGNAL_TIMESTAMP (XP_TE_PARTREASON, sess, user, ip, chan, reason,
										  0, tags_data->timestamp);
		else
			EMIT_SIGNAL_TIMESTAMP (XP_TE_PART, sess, user, ip, chan, NULL, 0,
										  tags_data->timestamp);
		userlist_remove (sess, user);
	}
}

void
inbound_topictime (server *serv, char *chan, char *nick, time_t stamp,
						 const message_tags_data *tags_data)
{
	char *tim = ctime (&stamp);
	session *sess = find_channel (serv, chan);

	if (!sess)
		sess = serv->server_session;

	tim[24] = 0;	/* get rid of the \n */
	EMIT_SIGNAL_TIMESTAMP (XP_TE_TOPICDATE, sess, chan, nick, tim, NULL, 0,
								  tags_data->timestamp);
}

void
inbound_quit (server *serv, char *nick, char *ip, char *reason,
				  const message_tags_data *tags_data)
{
	GSList *list = sess_list;
	session *sess;
	struct User *user;
	int was_on_front_session = FALSE;

	while (list)
	{
		sess = (session *) list->data;
		if (sess->server == serv)
		{
 			if (sess == current_sess)
 				was_on_front_session = TRUE;
			if ((user = userlist_find (sess, nick)))
			{
				EMIT_SIGNAL_TIMESTAMP (XP_TE_QUIT, sess, nick, reason, ip, NULL, 0,
											  tags_data->timestamp);
				userlist_remove_user (sess, user);
			} else if (sess->type == SESS_DIALOG && !serv->p_cmp (sess->channel, nick))
			{
				EMIT_SIGNAL_TIMESTAMP (XP_TE_QUIT, sess, nick, reason, ip, NULL, 0,
											  tags_data->timestamp);
			}
		}
		list = list->next;
	}

	notify_set_offline (serv, nick, was_on_front_session, tags_data);
}

void
inbound_account (server *serv, char *nick, char *account,
					  const message_tags_data *tags_data)
{
	session *sess = NULL;
	GSList *list;

	list = sess_list;
	while (list)
	{
		sess = list->data;
		if (sess->server == serv)
			userlist_set_account (sess, nick, account);
		list = list->next;
	}
}

void
inbound_ping_reply (session *sess, char *timestring, char *from,
						  const message_tags_data *tags_data)
{
	unsigned long tim, nowtim, dif;
	int lag = 0;
	char outbuf[64];

	if (strncmp (timestring, "LAG", 3) == 0)
	{
		timestring += 3;
		lag = 1;
	}

	tim = strtoul (timestring, NULL, 10);
	nowtim = make_ping_time ();
	dif = nowtim - tim;

	sess->server->ping_recv = time (0);

	if (lag)
	{
		sess->server->lag_sent = 0;
		sess->server->lag = dif;
		fe_set_lag (sess->server, dif);
		return;
	}

	if (atol (timestring) == 0)
	{
		if (sess->server->lag_sent)