irc.c

irc message protocol stack

/**
 * @file irc.c
 *
 * gaim
 *
 * Copyright (C) 2003, Robbert Haarman <[e-mail]>
 * Copyright (C) 2003, Ethan Blanton <[e-mail]>
 * Copyright (C) 2000-2003, Rob Flynn <[e-mail]>
 * Copyright (C) 1998-1999, Mark Spencer <[e-mail]>
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "internal.h"

#include "accountopt.h"
#include "blist.h"
#include "conversation.h"
#include "debug.h"
#include "notify.h"
#include "prpl.h"
#include "plugin.h"
#include "util.h"
#include "version.h"

#include "irc.h"

static void irc_buddy_append(char *name, struct irc_buddy *ib, GString *string);

static const char *irc_blist_icon(GaimAccount *a, GaimBuddy *b);
static void irc_blist_emblems(GaimBuddy *b, char **se, char **sw, char **nw, char **ne);
static GList *irc_away_states(GaimConnection *gc);
static GList *irc_actions(GaimPlugin *plugin, gpointer context);
/* static GList *irc_chat_info(GaimConnection *gc); */
static void irc_login(GaimAccount *account);
static void irc_login_cb(gpointer data, gint source, GaimInputCondition cond);
static void irc_close(GaimConnection *gc);
static int irc_im_send(GaimConnection *gc, const char *who, const char *what, GaimConvImFlags flags);
static int irc_chat_send(GaimConnection *gc, int id, const char *what);
static void irc_chat_join (GaimConnection *gc, GHashTable *data);
static void irc_input_cb(gpointer data, gint source, GaimInputCondition cond);

static guint irc_nick_hash(const char *nick);
static gboolean irc_nick_equal(const char *nick1, const char *nick2);
static void irc_buddy_free(struct irc_buddy *ib);

static GaimPlugin *_irc_plugin = NULL;

static const char *status_chars = "@+%&";

static void irc_view_motd(GaimPluginAction *action)
{
	GaimConnection *gc = (GaimConnection *) action->context;
	struct irc_conn *irc;
	char *title;

	if (gc == NULL || gc->proto_data == NULL) {
		gaim_debug(GAIM_DEBUG_ERROR, "irc", "got MOTD request for NULL gc\n");
		return;
	}
	irc = gc->proto_data;
	if (irc->motd == NULL) {
		gaim_notify_error(gc, _("Error displaying MOTD"), _("No MOTD available"),
				  _("There is no MOTD associated with this connection."));
		return;
	}
	title = g_strdup_printf(_("MOTD for %s"), irc->server);
	gaim_notify_formatted(gc, title, title, NULL, irc->motd->str, NULL, NULL);
}

int irc_send(struct irc_conn *irc, const char *buf)
{
	int ret;

	if (irc->fd < 0)
		return -1;

	/* gaim_debug(GAIM_DEBUG_MISC, "irc", "sent: %s", buf); */
	if ((ret = write(irc->fd, buf, strlen(buf))) < 0)
		gaim_connection_error(gaim_account_get_connection(irc->account),
				      _("Server has disconnected"));

	return ret;
}

/* XXX I don't like messing directly with these buddies */
gboolean irc_blist_timeout(struct irc_conn *irc)
{
	GString *string = g_string_sized_new(512);
	char *list, *buf;

	g_hash_table_foreach(irc->buddies, (GHFunc)irc_buddy_append, (gpointer)string);

	list = g_string_free(string, FALSE);
	if (!list || !strlen(list)) {
		g_free(list);
		return TRUE;
	}

	buf = irc_format(irc, "vn", "ISON", list);
	g_free(list);
	irc_send(irc, buf);
	g_free(buf);

	return TRUE;
}

static void irc_buddy_append(char *name, struct irc_buddy *ib, GString *string)
{
	ib->flag = FALSE;
	g_string_append_printf(string, "%s ", name);
}

static void irc_ison_one(struct irc_conn *irc, struct irc_buddy *ib)
{
	char *buf;

	ib->flag = FALSE;
	buf = irc_format(irc, "vn", "ISON", ib->name);
	irc_send(irc, buf);
	g_free(buf);
}


static const char *irc_blist_icon(GaimAccount *a, GaimBuddy *b)
{
	return "irc";
}

static void irc_blist_emblems(GaimBuddy *b, char **se, char **sw, char **nw, char **ne)
{
	if (b->present == GAIM_BUDDY_OFFLINE)
		*se = "offline";
}

static GList *irc_away_states(GaimConnection *gc)
{
	return g_list_append(NULL, (gpointer)GAIM_AWAY_CUSTOM);
}

static GList *irc_actions(GaimPlugin *plugin, gpointer context)
{
	GList *list = NULL;
	GaimPluginAction *act = NULL;

	act = gaim_plugin_action_new(_("View MOTD"), irc_view_motd);
	list = g_list_append(list, act);

	return list;
}

#if 0
static GList *irc_blist_node_menu(GaimBlistNode *node)
{
	GList *m = NULL;
	GaimBlistNodeAction *act;

	return m;
}
#endif

static GList *irc_chat_join_info(GaimConnection *gc)
{
	GList *m = NULL;
	struct proto_chat_entry *pce;

	pce = g_new0(struct proto_chat_entry, 1);
	pce->label = _("_Channel:");
	pce->identifier = "channel";
	m = g_list_append(m, pce);

	pce = g_new0(struct proto_chat_entry, 1);
	pce->label = _("_Password:");
	pce->identifier = "password";
	pce->secret = TRUE;
	m = g_list_append(m, pce);

	return m;
}

GHashTable *irc_chat_info_defaults(GaimConnection *gc, const char *chat_name)
{
	GHashTable *defaults;

	defaults = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, g_free);

	if (chat_name != NULL)
		g_hash_table_insert(defaults, "channel", g_strdup(chat_name));

	return defaults;
}

static void irc_login(GaimAccount *account)
{
	GaimConnection *gc;
	struct irc_conn *irc;
	char *buf, **userparts;
	const char *username = gaim_account_get_username(account);
	int err;

	gc = gaim_account_get_connection(account);
	gc->flags |= GAIM_CONNECTION_NO_NEWLINES;

	if (strpbrk(username, " \t\v\r\n") != NULL) {
		gaim_connection_error(gc, _("IRC nicks may not contain whitespace"));
		return;
	}

	gc->proto_data = irc = g_new0(struct irc_conn, 1);
	irc->account = account;

	userparts = g_strsplit(username, "@", 2);
	gaim_connection_set_display_name(gc, userparts[0]);
	irc->server = g_strdup(userparts[1]);
	g_strfreev(userparts);

	irc->buddies = g_hash_table_new_full((GHashFunc)irc_nick_hash, (GEqualFunc)irc_nick_equal, 
					     NULL, (GDestroyNotify)irc_buddy_free);
	irc->cmds = g_hash_table_new(g_str_hash, g_str_equal);
	irc_cmd_table_build(irc);
	irc->msgs = g_hash_table_new(g_str_hash, g_str_equal);
	irc_msg_table_build(irc);

	buf = g_strdup_printf(_("Signon: %s"), username);
	gaim_connection_update_progress(gc, buf, 1, 2);
	g_free(buf);

	err = gaim_proxy_connect(account, irc->server, 
				 gaim_account_get_int(account, "port", IRC_DEFAULT_PORT),
				 irc_login_cb, gc);

	if (err || !account->gc) {
		gaim_connection_error(gc, _("Couldn't create socket"));
		return;
	}
}

static void irc_login_cb(gpointer data, gint source, GaimInputCondition cond)
{
	GaimConnection *gc = data;
	struct irc_conn *irc = gc->proto_data;
	char hostname[256];
	char *buf;
	const char *username, *realname;
	GList *connections = gaim_connections_get_all();

	if (source < 0) {
		gaim_connection_error(gc, _("Couldn't connect to host"));
		return;
	}

	if (!g_list_find(connections, gc)) {
		close(source);
		return;
	}

	irc->fd = source;

	if (gc->account->password && *gc->account->password) {
		buf = irc_format(irc, "vv", "PASS", gc->account->password);
		if (irc_send(irc, buf) < 0) {
			gaim_connection_error(gc, "Error sending password");
			return;
		}
		g_free(buf);
	}

	gethostname(hostname, sizeof(hostname));
	hostname[sizeof(hostname) - 1] = '\0';
	username = gaim_account_get_string(irc->account, "username", "");
	realname = gaim_account_get_string(irc->account, "realname", "");
	buf = irc_format(irc, "vvvv:", "USER", strlen(username) ? username : g_get_user_name(), hostname, irc->server,
			      strlen(realname) ? realname : IRC_DEFAULT_ALIAS);
	if (irc_send(irc, buf) < 0) {
		gaim_connection_error(gc, "Error registering with server");
		return;
	}
	g_free(buf);
	buf = irc_format(irc, "vn", "NICK", gaim_connection_get_display_name(gc));
	if (irc_send(irc, buf) < 0) {
		gaim_connection_error(gc, "Error sending nickname");
		return;
	}
	g_free(buf);

	gc->inpa = gaim_input_add(irc->fd, GAIM_INPUT_READ, irc_input_cb, gc);
}

static void irc_close(GaimConnection *gc)
{
	struct irc_conn *irc = gc->proto_data;

	if (irc == NULL)
		return;

	irc_cmd_quit(irc, "quit", NULL, NULL);

	if (gc->inpa)
		gaim_input_remove(gc->inpa);

	g_free(irc->inbuf);
	close(irc->fd);
	if (irc->timer)
		gaim_timeout_remove(irc->timer);
	g_hash_table_destroy(irc->cmds);
	g_hash_table_destroy(irc->msgs);
	if (irc->motd)
		g_string_free(irc->motd, TRUE);
	g_free(irc->server);
	g_free(irc);
}

static int irc_im_send(GaimConnection *gc, const char *who, const char *what, GaimConvImFlags flags)
{
	struct irc_conn *irc = gc->proto_data;
	const char *args[2];

	if (strchr(status_chars, *who) != NULL)
		args[0] = who + 1;
	else
		args[0] = who;
	args[1] = what;

	irc_cmd_privmsg(irc, "msg", NULL, args);
	return 1;
}

static void irc_get_info(GaimConnection *gc, const char *who)
{
	struct irc_conn *irc = gc->proto_data;
	const char *args[1];
	args[0] = who;
	irc_cmd_whois(irc, "whois", NULL, args);
}

static void irc_set_away(GaimConnection *gc, const char *state, const char *msg)
{
	struct irc_conn *irc = gc->proto_data;
	const char *args[1];