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/*
server.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 "signals.h"
#include "commands.h"
#include "line-split.h"
#include "net-nonblock.h"
#include "net-sendbuffer.h"
#include "misc.h"
#include "rawlog.h"
#include "settings.h"
#include "chat-protocols.h"
#include "servers.h"
#include "servers-reconnect.h"
#include "servers-setup.h"
#include "channels.h"
#include "queries.h"
GSList *servers, *lookup_servers;
/* connection to server failed */
void server_connect_failed(SERVER_REC *server, const char *msg)
{
g_return_if_fail(IS_SERVER(server));
lookup_servers = g_slist_remove(lookup_servers, server);
signal_emit("server connect failed", 2, server, msg);
if (server->connect_tag != -1) {
g_source_remove(server->connect_tag);
server->connect_tag = -1;
}
if (server->handle != NULL) {
net_sendbuffer_destroy(server->handle, TRUE);
server->handle = NULL;
}
if (server->connect_pipe[0] != NULL) {
g_io_channel_close(server->connect_pipe[0]);
g_io_channel_unref(server->connect_pipe[0]);
g_io_channel_close(server->connect_pipe[1]);
g_io_channel_unref(server->connect_pipe[1]);
server->connect_pipe[0] = NULL;
server->connect_pipe[1] = NULL;
}
server_unref(server);
}
/* generate tag from server's address */
static char *server_create_address_tag(const char *address)
{
const char *start, *end;
g_return_val_if_fail(address != NULL, NULL);
/* try to generate a reasonable server tag */
if (strchr(address, '.') == NULL) {
start = end = NULL;
} else if (g_strncasecmp(address, "irc", 3) == 0 ||
g_strncasecmp(address, "chat", 4) == 0) {
/* irc-2.cs.hut.fi -> hut, chat.bt.net -> bt */
end = strrchr(address, '.');
start = end-1;
while (start > address && *start != '.') start--;
} else {
/* efnet.cs.hut.fi -> efnet */
end = strchr(address, '.');
start = end;
}
if (start == end) start = address; else start++;
if (end == NULL) end = address + strlen(address);
return g_strndup(start, (int) (end-start));
}
/* create unique tag for server. prefer ircnet's name or
generate it from server's address */
static char *server_create_tag(SERVER_CONNECT_REC *conn)
{
GString *str;
char *tag;
int num;
g_return_val_if_fail(IS_SERVER_CONNECT(conn), NULL);
tag = conn->chatnet != NULL && *conn->chatnet != '\0' ?
g_strdup(conn->chatnet) :
server_create_address_tag(conn->address);
if (conn->tag != NULL && server_find_tag(conn->tag) == NULL &&
strncmp(conn->tag, tag, strlen(tag)) == 0) {
/* use the existing tag if it begins with the same ID -
this is useful when you have several connections to
same server and you want to keep the same tags with
the servers (or it would cause problems when rejoining
/LAYOUT SAVEd channels). */
g_free(tag);
return g_strdup(conn->tag);
}
/* then just append numbers after tag until unused is found.. */
str = g_string_new(tag);
for (num = 2; server_find_tag(str->str) != NULL; num++)
g_string_sprintf(str, "%s%d", tag, num);
g_free(tag);
tag = str->str;
g_string_free(str, FALSE);
return tag;
}
/* Connection to server finished, fill the rest of the fields */
void server_connect_finished(SERVER_REC *server)
{
server->connect_time = time(NULL);
servers = g_slist_append(servers, server);
signal_emit("server connected", 1, server);
}
static void server_connect_callback_init(SERVER_REC *server, GIOChannel *handle)
{
int error;
g_return_if_fail(IS_SERVER(server));
error = net_geterror(handle);
if (error != 0) {
server->connection_lost = TRUE;
server_connect_failed(server, g_strerror(error));
return;
}
lookup_servers = g_slist_remove(lookup_servers, server);
g_source_remove(server->connect_tag);
server->connect_tag = -1;
server_connect_finished(server);
}
static void server_real_connect(SERVER_REC *server, IPADDR *ip,
const char *unix_socket)
{
GIOChannel *handle;
IPADDR *own_ip;
int port, error;
g_return_if_fail(ip != NULL || unix_socket != NULL);
signal_emit("server connecting", 2, server, ip);
if (ip != NULL) {
own_ip = ip == NULL ? NULL :
(IPADDR_IS_V6(ip) ? server->connrec->own_ip6 :
server->connrec->own_ip4);
port = server->connrec->proxy != NULL ?
server->connrec->proxy_port : server->connrec->port;
handle = net_connect_ip(ip, port, own_ip, &error);
} else {
handle = net_connect_unix(unix_socket, &error);
}
if (handle == NULL) {
/* failed */
server->connection_lost = TRUE;
server_connect_failed(server, g_strerror(error));
} else {
server->handle = net_sendbuffer_create(handle, 0);
server->connect_tag =
g_input_add(handle, G_INPUT_WRITE | G_INPUT_READ,
(GInputFunction)
server_connect_callback_init,
server);
}
}
static void server_connect_callback_readpipe(SERVER_REC *server)
{
RESOLVED_IP_REC iprec;
IPADDR *ip;
const char *errormsg;
g_source_remove(server->connect_tag);
server->connect_tag = -1;
net_gethostbyname_return(server->connect_pipe[0], &iprec);
g_io_channel_close(server->connect_pipe[0]);
g_io_channel_unref(server->connect_pipe[0]);
g_io_channel_close(server->connect_pipe[1]);
g_io_channel_unref(server->connect_pipe[1]);
server->connect_pipe[0] = NULL;
server->connect_pipe[1] = NULL;
/* figure out if we should use IPv4 or v6 address */
if (iprec.error != 0) {
/* error */
ip = NULL;
} else if (server->connrec->family == AF_INET) {
/* force IPv4 connection */
ip = iprec.ip4.family == 0 ? NULL : &iprec.ip4;
} else if (server->connrec->family == AF_INET6) {
/* force IPv6 connection */
ip = iprec.ip6.family == 0 ? NULL : &iprec.ip6;
} else {
/* pick the one that was found, or if both do it like
/SET resolve_prefer_ipv6 says. */
ip = iprec.ip4.family == 0 ||
(iprec.ip6.family != 0 &&
settings_get_bool("resolve_prefer_ipv6")) ?
&iprec.ip6 : &iprec.ip4;
}
if (ip != NULL) {
/* host lookup ok */
server_real_connect(server, ip, NULL);
errormsg = NULL;
} else {
if (iprec.error == 0 || net_hosterror_notfound(iprec.error)) {
/* IP wasn't found for the host, don't try to
reconnect back to this server */
server->dns_error = TRUE;
}
if (iprec.error == 0) {
/* forced IPv4 or IPv6 address but it wasn't found */
errormsg = server->connrec->family == AF_INET ?
"IPv4 address not found for host" :
"IPv6 address not found for host";
} else {
/* gethostbyname() failed */
errormsg = iprec.errorstr != NULL ? iprec.errorstr :
"Host lookup failed";
}
server->connection_lost = TRUE;
server_connect_failed(server, errormsg);
}
g_free(iprec.errorstr);
}
SERVER_REC *server_connect(SERVER_CONNECT_REC *conn)
{
CHAT_PROTOCOL_REC *proto;
SERVER_REC *server;
proto = CHAT_PROTOCOL(conn);
server = proto->server_init_connect(conn);
proto->server_connect(server);
return server;
}
/* initializes server record but doesn't start connecting */
void server_connect_init(SERVER_REC *server)
{
const char *str;
g_return_if_fail(server != NULL);
MODULE_DATA_INIT(server);
server->type = module_get_uniq_id("SERVER", 0);
server_ref(server);
server->nick = g_strdup(server->connrec->nick);
if (server->connrec->username == NULL || *server->connrec->username == '\0') {
g_free_not_null(server->connrec->username);
str = g_get_user_name();
if (*str == '\0') str = "unknown";
server->connrec->username = g_strdup(str);
}
if (server->connrec->realname == NULL || *server->connrec->realname == '\0') {
g_free_not_null(server->connrec->realname);
str = g_get_real_name();
if (*str == '\0') str = server->connrec->username;
server->connrec->realname = g_strdup(str);
}
server->tag = server_create_tag(server->connrec);
server->connect_tag = -1;
}
/* starts connecting to server */
int server_start_connect(SERVER_REC *server)
{
const char *connect_address;
int fd[2];
g_return_val_if_fail(server != NULL, FALSE);
if (!server->connrec->unix_socket && server->connrec->port <= 0)
return FALSE;
server->rawlog = rawlog_create();
if (server->connrec->connect_handle != NULL) {
/* already connected */
GIOChannel *handle = server->connrec->connect_handle;
server->connrec->connect_handle = NULL;
server->handle = net_sendbuffer_create(handle, 0);
server_connect_finished(server);
} else if (server->connrec->unix_socket) {
/* connect with unix socket */
server_real_connect(server, NULL, server->connrec->address);
} else {
/* resolve host name */
if (pipe(fd) != 0) {
g_warning("server_connect(): pipe() failed.");
g_free(server->tag);
g_free(server->nick);
return FALSE;
}
server->connect_pipe[0] = g_io_channel_unix_new(fd[0]);
server->connect_pipe[1] = g_io_channel_unix_new(fd[1]);
connect_address = server->connrec->proxy != NULL ?
server->connrec->proxy : server->connrec->address;
server->connect_pid =
net_gethostbyname_nonblock(connect_address,
server->connect_pipe[1]);
server->connect_tag =
g_input_add(server->connect_pipe[0], G_INPUT_READ,
(GInputFunction)
server_connect_callback_readpipe,
server);
lookup_servers = g_slist_append(lookup_servers, server);
signal_emit("server looking", 1, server);
}
return TRUE;
}
static int server_remove_channels(SERVER_REC *server)
{
GSList *tmp, *next;
int found;
g_return_val_if_fail(server != NULL, FALSE);
found = FALSE;
for (tmp = server->channels; tmp != NULL; tmp = next) {
CHANNEL_REC *channel = tmp->data;
next = tmp->next;
channel_destroy(channel);
found = TRUE;
}
while (server->queries != NULL)
query_change_server(server->queries->data, NULL);
g_slist_free(server->channels);
g_slist_free(server->queries);
return found;
}
void server_disconnect(SERVER_REC *server)
{
int chans;
g_return_if_fail(IS_SERVER(server));
if (server->disconnected)
return;
if (server->connect_tag != -1) {
/* still connecting to server.. */
if (server->connect_pid != -1)
net_disconnect_nonblock(server->connect_pid);
server_connect_failed(server, NULL);
return;
}
servers = g_slist_remove(servers, server);
server->disconnected = TRUE;
signal_emit("server disconnected", 1, server);
/* close all channels */
chans = server_remove_channels(server);
if (server->handle != NULL) {
if (!chans || server->connection_lost)
net_sendbuffer_destroy(server->handle, TRUE);
else {
/* we were on some channels, try to let the server
disconnect so that our quit message is guaranteed
to get displayed */
net_disconnect_later(net_sendbuffer_handle(server->handle));
net_sendbuffer_destroy(server->handle, FALSE);
}
server->handle = NULL;
}
if (server->readtag > 0) {
g_source_remove(server->readtag);
server->readtag = -1;
}
server_unref(server);
}
void server_ref(SERVER_REC *server)
{
g_return_if_fail(IS_SERVER(server));
server->refcount++;
}
int server_unref(SERVER_REC *server)
{
g_return_val_if_fail(IS_SERVER(server), FALSE);
if (--server->refcount > 0)
return TRUE;
if (g_slist_find(servers, server) != NULL) {
g_warning("Non-referenced server wasn't disconnected");
server_disconnect(server);
return TRUE;
}
MODULE_DATA_DEINIT(server);
server_connect_unref(server->connrec);
if (server->rawlog != NULL) rawlog_destroy(server->rawlog);
if (server->buffer != NULL) line_split_free(server->buffer);
g_free(server->version);
g_free(server->away_reason);
g_free(server->nick);
g_free(server->tag);
server->type = 0;
g_free(server);
return FALSE;
}
SERVER_REC *server_find_tag(const char *tag)
{
GSList *tmp;
g_return_val_if_fail(tag != NULL, NULL);
if (*tag == '\0') return NULL;
for (tmp = servers; tmp != NULL; tmp = tmp->next) {
SERVER_REC *server = tmp->data;
if (g_strcasecmp(server->tag, tag) == 0)
return server;
}
return NULL;
}
SERVER_REC *server_find_chatnet(const char *chatnet)
{
GSList *tmp;
g_return_val_if_fail(chatnet != NULL, NULL);
if (*chatnet == '\0') return NULL;
for (tmp = servers; tmp != NULL; tmp = tmp->next) {
SERVER_REC *server = tmp->data;
if (server->connrec->chatnet != NULL &&
g_strcasecmp(server->connrec->chatnet, chatnet) == 0)
return server;
}
return NULL;
}
void server_connect_ref(SERVER_CONNECT_REC *conn)
{
conn->refcount++;
}
void server_connect_unref(SERVER_CONNECT_REC *conn)
{
g_return_if_fail(IS_SERVER_CONNECT(conn));
if (--conn->refcount > 0)
return;
if (conn->refcount < 0) {
g_warning("Connection '%s' refcount = %d",
conn->tag, conn->refcount);
}
CHAT_PROTOCOL(conn)->destroy_server_connect(conn);
if (conn->connect_handle != NULL)
net_disconnect(conn->connect_handle);
g_free_not_null(conn->proxy);
g_free_not_null(conn->proxy_string);
g_free_not_null(conn->proxy_string_after);
g_free_not_null(conn->proxy_password);
g_free_not_null(conn->tag);
g_free_not_null(conn->address);
g_free_not_null(conn->chatnet);
g_free_not_null(conn->own_ip4);
g_free_not_null(conn->own_ip6);
g_free_not_null(conn->password);
g_free_not_null(conn->nick);
g_free_not_null(conn->username);
g_free_not_null(conn->realname);
g_free_not_null(conn->channels);
g_free_not_null(conn->away_reason);
conn->type = 0;
g_free(conn);
}
void server_change_nick(SERVER_REC *server, const char *nick)
{
g_free(server->nick);
server->nick = g_strdup(nick);
signal_emit("server nick changed", 1, server);
}
/* Update own IPv4 and IPv6 records */
void server_connect_own_ip_save(SERVER_CONNECT_REC *conn,
IPADDR *ip4, IPADDR *ip6)
{
if (ip4 == NULL || ip4->family == 0)
g_free_and_null(conn->own_ip4);
if (ip6 == NULL || ip6->family == 0)
g_free_and_null(conn->own_ip6);
if (ip4 != NULL && ip4->family != 0) {
/* IPv4 address was found */
if (conn->own_ip4 == NULL)
conn->own_ip4 = g_new0(IPADDR, 1);
memcpy(conn->own_ip4, ip4, sizeof(IPADDR));
}
if (ip6 != NULL && ip6->family != 0) {
/* IPv6 address was found */
if (conn->own_ip6 == NULL)
conn->own_ip6 = g_new0(IPADDR, 1);
memcpy(conn->own_ip6, ip6, sizeof(IPADDR));
}
}
/* `optlist' should contain only one unknown key - the server tag.
returns NULL if there was unknown -option */
SERVER_REC *cmd_options_get_server(const char *cmd,
GHashTable *optlist,
SERVER_REC *defserver)
{
SERVER_REC *server;
GSList *list, *tmp, *next;
/* get all the options, then remove the known ones. there should
be only one left - the server tag. */
list = hashtable_get_keys(optlist);
if (cmd != NULL) {
for (tmp = list; tmp != NULL; tmp = next) {
char *option = tmp->data;
next = tmp->next;
if (command_have_option(cmd, option))
list = g_slist_remove(list, option);
}
}
if (list == NULL)
return defserver;
server = server_find_tag(list->data);
if (server == NULL || list->next != NULL) {
/* unknown option (not server tag) */
signal_emit("error command", 2,
GINT_TO_POINTER(CMDERR_OPTION_UNKNOWN),
server == NULL ? list->data : list->next->data);
signal_stop();
server = NULL;
}
g_slist_free(list);
return server;
}
static void disconnect_servers(GSList *servers, int chat_type)
{
GSList *tmp, *next;
for (tmp = servers; tmp != NULL; tmp = next) {
SERVER_REC *rec = tmp->data;
next = tmp->next;
if (rec->chat_type == chat_type)
server_disconnect(rec);
}
}
static void sig_chat_protocol_deinit(CHAT_PROTOCOL_REC *proto)
{
disconnect_servers(servers, proto->id);
disconnect_servers(lookup_servers, proto->id);
}
void servers_init(void)
{
settings_add_bool("server", "resolve_prefer_ipv6", FALSE);
lookup_servers = servers = NULL;
signal_add("chat protocol deinit", (SIGNAL_FUNC) sig_chat_protocol_deinit);
servers_reconnect_init();
servers_setup_init();
}
void servers_deinit(void)
{
signal_remove("chat protocol deinit", (SIGNAL_FUNC) sig_chat_protocol_deinit);
servers_setup_deinit();
servers_reconnect_deinit();
module_uniq_destroy("SERVER");
module_uniq_destroy("SERVER CONNECT");
}
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