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/*
servers-reconnect.c : irssi
Copyright (C) 1999-2000 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "module.h"
#include "commands.h"
#include "network.h"
#include "signals.h"
#include "chat-protocols.h"
#include "servers.h"
#include "servers-setup.h"
#include "servers-reconnect.h"
#include "settings.h"
GSList *reconnects;
static int last_reconnect_tag;
static int reconnect_timeout_tag;
static int reconnect_time;
void reconnect_save_status(SERVER_CONNECT_REC *conn, SERVER_REC *server)
{
g_free_not_null(conn->away_reason);
conn->away_reason = !server->usermode_away ? NULL :
g_strdup(server->away_reason);
signal_emit("server reconnect save status", 2, conn, server);
}
static void server_reconnect_add(SERVER_CONNECT_REC *conn,
time_t next_connect)
{
RECONNECT_REC *rec;
g_return_if_fail(IS_SERVER_CONNECT(conn));
rec = g_new(RECONNECT_REC, 1);
rec->tag = ++last_reconnect_tag;
rec->conn = conn;
rec->next_connect = next_connect;
reconnects = g_slist_append(reconnects, rec);
}
void server_reconnect_destroy(RECONNECT_REC *rec, int free_conn)
{
g_return_if_fail(rec != NULL);
reconnects = g_slist_remove(reconnects, rec);
signal_emit("server reconnect remove", 1, rec);
if (free_conn) server_connect_free(rec->conn);
g_free(rec);
if (reconnects == NULL)
last_reconnect_tag = 0;
}
static int server_reconnect_timeout(void)
{
SERVER_CONNECT_REC *conn;
GSList *list, *tmp;
time_t now;
/* If server_connect() removes the next reconnection in queue,
we're screwed. I don't think this should happen anymore, but just
to be sure we don't crash, do this safely. */
list = g_slist_copy(reconnects);
now = time(NULL);
for (tmp = list; tmp != NULL; tmp = tmp->next) {
RECONNECT_REC *rec = tmp->data;
if (g_slist_find(reconnects, rec) == NULL)
continue;
if (rec->next_connect <= now) {
conn = rec->conn;
server_reconnect_destroy(rec, FALSE);
CHAT_PROTOCOL(conn)->server_connect(conn);
}
}
g_slist_free(list);
return 1;
}
static void sserver_connect(SERVER_SETUP_REC *rec, SERVER_CONNECT_REC *conn)
{
conn->address = g_strdup(rec->address);
if (conn->port == 0) conn->port = rec->port;
server_setup_fill_reconn(conn, rec);
if (rec->last_connect > time(NULL)-reconnect_time) {
/* can't reconnect this fast, wait.. */
server_reconnect_add(conn, rec->last_connect+reconnect_time);
} else {
/* connect to server.. */
CHAT_PROTOCOL(conn)->server_connect(conn);
}
}
static SERVER_CONNECT_REC *
server_connect_copy_skeleton(SERVER_CONNECT_REC *src)
{
SERVER_CONNECT_REC *dest;
dest = NULL;
signal_emit("server connect copy", 2, &dest, src);
g_return_val_if_fail(dest != NULL, NULL);
dest->type = module_get_uniq_id("SERVER CONNECT", 0);
dest->reconnection = src->reconnection;
dest->proxy = g_strdup(src->proxy);
dest->proxy_port = src->proxy_port;
dest->proxy_string = g_strdup(src->proxy_string);
dest->chatnet = g_strdup(src->chatnet);
dest->nick = g_strdup(src->nick);
dest->username = g_strdup(src->username);
dest->realname = g_strdup(src->realname);
if (src->own_ip != NULL) {
dest->own_ip = g_new(IPADDR, 1);
memcpy(dest->own_ip, src->own_ip, sizeof(IPADDR));
}
dest->channels = g_strdup(src->channels);
dest->away_reason = g_strdup(src->away_reason);
return dest;
}
#define server_should_reconnect(server) \
((server)->connection_lost && \
((server)->connrec->chatnet != NULL || !(server)->banned))
static void sig_reconnect(SERVER_REC *server)
{
SERVER_CONNECT_REC *conn;
SERVER_SETUP_REC *sserver;
GSList *tmp;
int found, through;
time_t now;
g_return_if_fail(IS_SERVER(server));
if (reconnect_time == -1 || !server_should_reconnect(server))
return;
conn = server_connect_copy_skeleton(server->connrec);
g_return_if_fail(conn != NULL);
/* save the server status */
if (server->connected) {
conn->reconnection = TRUE;
reconnect_save_status(conn, server);
}
sserver = server_setup_find(server->connrec->address,
server->connrec->port);
if (sserver != NULL) {
/* save the last connection time/status */
sserver->last_connect = server->connect_time == 0 ?
time(NULL) : server->connect_time;
sserver->last_failed = !server->connected;
if (server->banned) sserver->banned = TRUE;
}
if (sserver == NULL || conn->chatnet == NULL) {
/* not in any chatnet, just reconnect back to same server */
conn->address = g_strdup(server->connrec->address);
conn->port = server->connrec->port;
conn->password = server->connrec->password == NULL ? NULL :
g_strdup(server->connrec->password);
if (server->connect_time != 0 &&
time(NULL)-server->connect_time > reconnect_time) {
/* there's been enough time since last connection,
reconnect back immediately */
CHAT_PROTOCOL(conn)->server_connect(conn);
} else {
/* reconnect later.. */
server_reconnect_add(conn, (server->connect_time == 0 ? time(NULL) :
server->connect_time) + reconnect_time);
}
return;
}
/* always try to first connect to the first on the list where we
haven't got unsuccessful connection attempts for the last half
an hour. */
now = time(NULL);
for (tmp = setupservers; tmp != NULL; tmp = tmp->next) {
SERVER_SETUP_REC *rec = tmp->data;
if (rec->chatnet != NULL && g_strcasecmp(conn->chatnet, rec->chatnet) == 0 &&
!rec->banned && (!rec->last_connect || !rec->last_failed ||
rec->last_connect < now-FAILED_RECONNECT_WAIT)) {
if (rec == sserver)
conn->port = server->connrec->port;
sserver_connect(rec, conn);
return;
}
}
/* just try the next server in list */
found = through = FALSE;
for (tmp = setupservers; tmp != NULL; ) {
SERVER_SETUP_REC *rec = tmp->data;
if (!found && g_strcasecmp(rec->address, server->connrec->address) == 0 &&
server->connrec->port == rec->port)
found = TRUE;
else if (found && !rec->banned && rec->chatnet != NULL &&
g_strcasecmp(conn->chatnet, rec->chatnet) == 0) {
if (rec == sserver)
conn->port = server->connrec->port;
sserver_connect(rec, conn);
break;
}
if (tmp->next != NULL) {
tmp = tmp->next;
continue;
}
if (through) {
/* shouldn't happen unless there's no servers in
this chatnet in setup.. */
server_connect_free(conn);
break;
}
tmp = setupservers;
found = through = TRUE;
}
}
static void sig_connected(SERVER_REC *server)
{
g_return_if_fail(IS_SERVER(server));
if (!server->connrec->reconnection)
return;
if (server->connrec->channels != NULL)
server->channels_join(server, server->connrec->channels, TRUE);
}
/* Remove all servers from reconnect list */
/* SYNTAX: RMRECONNS */
static void cmd_rmreconns(void)
{
while (reconnects != NULL)
server_reconnect_destroy(reconnects->data, TRUE);
}
static RECONNECT_REC *reconnect_find_tag(int tag)
{
GSList *tmp;
for (tmp = reconnects; tmp != NULL; tmp = tmp->next) {
RECONNECT_REC *rec = tmp->data;
if (rec->tag == tag)
return rec;
}
return NULL;
}
/* SYNTAX: RECONNECT <tag> */
static void cmd_reconnect(const char *data, SERVER_REC *server)
{
SERVER_CONNECT_REC *conn;
RECONNECT_REC *rec;
char *str;
int tag;
if (*data == '\0' && server != NULL) {
/* reconnect back to same server */
str = g_strdup_printf("%s %d %s %s", server->connrec->address,
server->connrec->port,
server->connrec->password == NULL ? "-" :
server->connrec->password,
server->connrec->nick);
signal_emit("command server", 2, str, server);
g_free(str);
return;
}
if (*data == '\0') {
/* reconnect to first server in reconnection list */
if (reconnects == NULL)
cmd_return_error(CMDERR_NOT_CONNECTED);
rec = reconnects->data;
} else {
if (g_strncasecmp(data, "RECON-", 6) == 0)
data += 6;
tag = atoi(data);
rec = tag <= 0 ? NULL : reconnect_find_tag(tag);
if (rec == NULL) {
signal_emit("server reconnect not found", 1, data);
return;
}
}
conn = rec->conn;
server_reconnect_destroy(rec, FALSE);
CHAT_PROTOCOL(conn)->server_connect(conn);
}
static void cmd_disconnect(const char *data, SERVER_REC *server)
{
RECONNECT_REC *rec;
int tag;
if (g_strncasecmp(data, "RECON-", 6) != 0)
return; /* handle only reconnection removing */
rec = sscanf(data+6, "%d", &tag) == 1 && tag > 0 ?
reconnect_find_tag(tag) : NULL;
if (rec == NULL)
signal_emit("server reconnect not found", 1, data);
else
server_reconnect_destroy(rec, TRUE);
signal_stop();
}
static void read_settings(void)
{
reconnect_time = settings_get_int("server_reconnect_time");
}
void servers_reconnect_init(void)
{
settings_add_int("server", "server_reconnect_time", 300);
reconnects = NULL;
last_reconnect_tag = 0;
reconnect_timeout_tag = g_timeout_add(1000, (GSourceFunc) server_reconnect_timeout, NULL);
read_settings();
signal_add("server connect failed", (SIGNAL_FUNC) sig_reconnect);
signal_add("server disconnected", (SIGNAL_FUNC) sig_reconnect);
signal_add("event connected", (SIGNAL_FUNC) sig_connected);
signal_add("setup changed", (SIGNAL_FUNC) read_settings);
command_bind("rmreconns", NULL, (SIGNAL_FUNC) cmd_rmreconns);
command_bind("reconnect", NULL, (SIGNAL_FUNC) cmd_reconnect);
command_bind_first("disconnect", NULL, (SIGNAL_FUNC) cmd_disconnect);
}
void servers_reconnect_deinit(void)
{
g_source_remove(reconnect_timeout_tag);
while (reconnects != NULL)
server_reconnect_destroy(reconnects->data, TRUE);
signal_remove("server connect failed", (SIGNAL_FUNC) sig_reconnect);
signal_remove("server disconnected", (SIGNAL_FUNC) sig_reconnect);
signal_remove("event connected", (SIGNAL_FUNC) sig_connected);
signal_remove("setup changed", (SIGNAL_FUNC) read_settings);
command_unbind("rmreconns", (SIGNAL_FUNC) cmd_rmreconns);
command_unbind("reconnect", (SIGNAL_FUNC) cmd_reconnect);
command_unbind("disconnect", (SIGNAL_FUNC) cmd_disconnect);
}
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