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qq_network.c
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/**
* @file qq_network.c
*
* purple
*
* Purple is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* 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 02111-1301 USA
*/
#include "internal.h"
#include "cipher.h"
#include "debug.h"
#include "buddy_info.h"
#include "group_info.h"
#include "group_internal.h"
#include "qq_crypt.h"
#include "qq_define.h"
#include "qq_base.h"
#include "buddy_list.h"
#include "packet_parse.h"
#include "qq_network.h"
#include "qq_trans.h"
#include "utils.h"
#include "qq_process.h"
#define QQ_DEFAULT_PORT 8000
/* set QQ_CONNECT_MAX to 1, when test reconnecting */
#define QQ_CONNECT_MAX 3
#define QQ_CONNECT_INTERVAL 2
#define QQ_CONNECT_CHECK 5
#define QQ_KEEP_ALIVE_INTERVAL 60
#define QQ_TRANS_INTERVAL 10
gboolean connect_to_server(PurpleConnection *gc, gchar *server, gint port);
static qq_connection *connection_find(qq_data *qd, int fd) {
qq_connection *ret = NULL;
GSList *entry = qd->openconns;
while(entry) {
ret = entry->data;
if(ret->fd == fd) return ret;
entry = entry->next;
}
return NULL;
}
static qq_connection *connection_create(qq_data *qd, int fd) {
qq_connection *ret = g_new0(qq_connection, 1);
ret->fd = fd;
qd->openconns = g_slist_append(qd->openconns, ret);
return ret;
}
static void connection_remove(qq_data *qd, int fd) {
qq_connection *conn = connection_find(qd, fd);
qd->openconns = g_slist_remove(qd->openconns, conn);
g_return_if_fail( conn != NULL );
purple_debug_info("QQ", "Close socket %d\n", conn->fd);
if(conn->input_handler > 0) purple_input_remove(conn->input_handler);
if(conn->can_write_handler > 0) purple_input_remove(conn->can_write_handler);
if (conn->fd >= 0) close(conn->fd);
if(conn->tcp_txbuf != NULL) purple_circ_buffer_destroy(conn->tcp_txbuf);
if (conn->tcp_rxqueue != NULL) g_free(conn->tcp_rxqueue);
g_free(conn);
}
static void connection_free_all(qq_data *qd) {
qq_connection *ret = NULL;
GSList *entry = qd->openconns;
while(entry) {
ret = entry->data;
connection_remove(qd, ret->fd);
entry = qd->openconns;
}
}
static gboolean set_new_server(qq_data *qd)
{
gint count;
gint index;
GList *it = NULL;
g_return_val_if_fail(qd != NULL, FALSE);
if (qd->servers == NULL) {
purple_debug_info("QQ", "Server list is NULL\n");
return FALSE;
}
/* remove server used before */
if (qd->curr_server != NULL) {
purple_debug_info("QQ",
"Remove current [%s] from server list\n", qd->curr_server);
qd->servers = g_list_remove(qd->servers, qd->curr_server);
qd->curr_server = NULL;
}
count = g_list_length(qd->servers);
purple_debug_info("QQ", "Server list has %d\n", count);
if (count <= 0) {
/* no server left, disconnect when result is false */
qd->servers = NULL;
return FALSE;
}
/* get new server */
index = rand() % count;
it = g_list_nth(qd->servers, index);
qd->curr_server = it->data; /* do not free server_name */
if (qd->curr_server == NULL || strlen(qd->curr_server) <= 0 ) {
purple_debug_info("QQ", "Server name at %d is empty\n", index);
return FALSE;
}
purple_debug_info("QQ", "set new server to %s\n", qd->curr_server);
return TRUE;
}
static gint packet_get_header(guint8 *header_tag, guint16 *source_tag,
guint16 *cmd, guint16 *seq, guint8 *buf)
{
gint bytes = 0;
bytes += qq_get8(header_tag, buf + bytes);
bytes += qq_get16(source_tag, buf + bytes);
bytes += qq_get16(cmd, buf + bytes);
bytes += qq_get16(seq, buf + bytes);
bytes += 7; /* add 4 bytes qq num and 3 bytes fill 00 00 00 */
return bytes;
}
static gboolean connect_check(gpointer data)
{
PurpleConnection *gc = (PurpleConnection *) data;
qq_data *qd;
g_return_val_if_fail(gc != NULL && gc->proto_data != NULL, FALSE);
qd = (qq_data *) gc->proto_data;
if (qd->connect_watcher > 0) {
purple_timeout_remove(qd->connect_watcher);
qd->connect_watcher = 0;
}
if (qd->fd >= 0 && qd->ld.token_touch != NULL && qd->ld.token_touch_len > 0) {
purple_debug_info("QQ", "Connect ok\n");
return FALSE;
}
qd->connect_watcher = purple_timeout_add_seconds(0, qq_connect_later, gc);
return FALSE;
}
/* Warning: qq_connect_later destory all connection
* Any function should be care of use qq_data after call this function
* Please conside tcp_pending and udp_pending */
gboolean qq_connect_later(gpointer data)
{
PurpleConnection *gc;
char *tmp_server;
int port;
gchar **segments;
qq_data *qd;
gc = (PurpleConnection *) data;
g_return_val_if_fail(gc != NULL && gc->proto_data != NULL, FALSE);
qd = (qq_data *) gc->proto_data;
tmp_server = NULL;
if (qd->check_watcher > 0) {
purple_timeout_remove(qd->check_watcher);
qd->check_watcher = 0;
}
qq_disconnect(gc);
if (qd->redirect_ip.s_addr != 0) {
/* redirect to new server */
tmp_server = g_strdup_printf("%s:%d", inet_ntoa(qd->redirect_ip), qd->redirect_port);
qd->servers = g_list_append(qd->servers, tmp_server);
qd->curr_server = tmp_server;
tmp_server = NULL;
qd->redirect_ip.s_addr = 0;
qd->redirect_port = 0;
qd->connect_retry = QQ_CONNECT_MAX;
}
if (qd->curr_server == NULL || strlen (qd->curr_server) == 0 || qd->connect_retry <= 0) {
if ( set_new_server(qd) != TRUE) {
purple_connection_error_reason(gc,
PURPLE_CONNECTION_ERROR_NETWORK_ERROR,
_("Unable to connect"));
return FALSE;
}
qd->connect_retry = QQ_CONNECT_MAX;
}
segments = g_strsplit_set(qd->curr_server, ":", 0);
tmp_server = g_strdup(segments[0]);
if (NULL != segments[1]) {
port = atoi(segments[1]);
if (port <= 0) {
purple_debug_info("QQ", "Port not define in %s, use default.\n", qd->curr_server);
port = QQ_DEFAULT_PORT;
}
} else {
purple_debug_info("QQ", "Error splitting server string: %s, setting port to default.\n", qd->curr_server);
port = QQ_DEFAULT_PORT;
}
g_strfreev(segments);
qd->connect_retry--;
if ( !connect_to_server(gc, tmp_server, port) ) {
purple_connection_error_reason(gc,
PURPLE_CONNECTION_ERROR_NETWORK_ERROR,
_("Unable to connect"));
}
g_free(tmp_server);
tmp_server = NULL;
qd->check_watcher = purple_timeout_add_seconds(QQ_CONNECT_CHECK, connect_check, gc);
return FALSE; /* timeout callback stops */
}
static void redirect_server(PurpleConnection *gc)
{
qq_data *qd;
qd = (qq_data *) gc->proto_data;
if (qd->check_watcher > 0) {
purple_timeout_remove(qd->check_watcher);
qd->check_watcher = 0;
}
if (qd->connect_watcher > 0) purple_timeout_remove(qd->connect_watcher);
qd->connect_watcher = purple_timeout_add_seconds(QQ_CONNECT_INTERVAL, qq_connect_later, gc);
}
/* process the incoming packet from qq_pending */
static gboolean packet_process(PurpleConnection *gc, guint8 *buf, gint buf_len)
{
qq_data *qd;
gint bytes, bytes_not_read;
guint8 header_tag;
guint16 version_tag;
guint16 cmd;
guint16 seq; /* May be ack_seq or send_seq, depends on cmd */
guint8 room_cmd;
guint32 room_id;
guint32 update_class;
guintptr ship_value;
int ret;
qq_transaction *trans;
g_return_val_if_fail(buf != NULL && buf_len > 0, TRUE);
qd = (qq_data *) gc->proto_data;
qd->net_stat.rcved++;
if (qd->net_stat.rcved <= 0) memset(&(qd->net_stat), 0, sizeof(qd->net_stat));
/* Len, header and tail tag have been checked before */
bytes = 0;
bytes += packet_get_header(&header_tag, &version_tag, &cmd, &seq, buf + bytes);
#if 1
purple_debug_info("QQ", "==> [%05d] %s 0x%04X, version tag 0x%04X len %d\n",
seq, qq_get_cmd_desc(cmd), cmd, version_tag, buf_len);
#endif
/* this is the length of all the encrypted data (also remove tail tag) */
bytes_not_read = buf_len - bytes - 1;
/* ack packet, we need to update send tranactions */
/* we do not check duplication for server ack */
trans = qq_trans_find_rcved(gc, cmd, seq);
if (trans == NULL) {
/* new server command */
if ( !qd->is_login ) {
qq_trans_add_remain(gc, cmd, seq, buf + bytes, bytes_not_read);
} else {
qq_trans_add_server_cmd(gc, cmd, seq, buf + bytes, bytes_not_read);
qq_proc_server_cmd(gc, cmd, seq, buf + bytes, bytes_not_read);
}
return TRUE;
}
if (qq_trans_is_dup(trans)) {
qd->net_stat.rcved_dup++;
purple_debug_info("QQ", "dup [%05d] %s, discard...\n", seq, qq_get_cmd_desc(cmd));
return TRUE;
}
update_class = qq_trans_get_class(trans);
ship_value = qq_trans_get_ship(trans);
if (update_class != 0 || ship_value != 0) {
purple_debug_info("QQ", "Update class %d, ship_value %d\n", update_class, ship_value);
}
switch (cmd) {
case QQ_CMD_TOUCH_SERVER:
case QQ_CMD_CAPTCHA:
case QQ_CMD_AUTH:
case QQ_CMD_VERIFY_DE:
case QQ_CMD_VERIFY_E5:
case QQ_CMD_VERIFY_E3:
case QQ_CMD_LOGIN:
case QQ_CMD_LOGIN_E9:
case QQ_CMD_LOGIN_EA:
case QQ_CMD_LOGIN_GETLIST:
case QQ_CMD_LOGIN_ED:
case QQ_CMD_LOGIN_EC:
ret = qq_proc_login_cmds(gc, cmd, seq, buf + bytes, bytes_not_read, update_class, ship_value);
if (ret != QQ_LOGIN_REPLY_OK) {
if (ret == QQ_TOUCH_REPLY_REDIRECT) {
redirect_server(gc);
}
return FALSE; /* do nothing after this function and return now */
}
break;
case QQ_CMD_ROOM:
room_cmd = qq_trans_get_room_cmd(trans);
room_id = qq_trans_get_room_id(trans);
qq_proc_room_cmds(gc, seq, room_cmd, room_id, buf + bytes, bytes_not_read, update_class, ship_value);
break;
default:
qq_proc_client_cmds(gc, cmd, seq, buf + bytes, bytes_not_read, update_class, ship_value);
break;
}
return TRUE;
}
static void tcp_pending(gpointer data, gint source, PurpleInputCondition cond)
{
PurpleConnection *gc = (PurpleConnection *) data;
qq_data *qd;
qq_connection *conn;
guint8 buf[1024]; /* set to 16 when test tcp_rxqueue */
gint buf_len;
gint bytes;
guint8 *pkt;
guint16 pkt_len;
gchar *error_msg;
guint8 *jump;
gint jump_len;
g_return_if_fail(gc != NULL && gc->proto_data != NULL);
qd = (qq_data *) gc->proto_data;
if(cond != PURPLE_INPUT_READ) {
purple_connection_error_reason(gc,
PURPLE_CONNECTION_ERROR_NETWORK_ERROR,
_("Socket error"));
return;
}
conn = connection_find(qd, source);
g_return_if_fail(conn != NULL);
/* test code, not using tcp_rxqueue
memset(pkt,0, sizeof(pkt));
buf_len = read(qd->fd, pkt, sizeof(pkt));
if (buf_len > 2) {
packet_process(gc, pkt + 2, buf_len - 2);
}
return;
*/
buf_len = read(source, buf, sizeof(buf));
if (buf_len < 0) {
if (errno == EAGAIN)
/* No worries */
return;
error_msg = g_strdup_printf(_("Lost connection with server: %s"), g_strerror(errno));
purple_connection_error_reason(gc,
PURPLE_CONNECTION_ERROR_NETWORK_ERROR,
error_msg);
g_free(error_msg);
return;
} else if (buf_len == 0) {
purple_connection_error_reason(gc, PURPLE_CONNECTION_ERROR_NETWORK_ERROR,
_("Server closed the connection"));
return;
}
/* keep alive will be sent in 30 seconds since last_receive
* QQ need a keep alive packet in every 60 seconds
gc->last_received = time(NULL);
*/
/* purple_debug_info("TCP_PENDING", "Read %d bytes, rxlen is %d\n", buf_len, conn->tcp_rxlen); */
conn->tcp_rxqueue = g_realloc(conn->tcp_rxqueue, buf_len + conn->tcp_rxlen);
memcpy(conn->tcp_rxqueue + conn->tcp_rxlen, buf, buf_len);
conn->tcp_rxlen += buf_len;
pkt = g_newa(guint8, MAX_PACKET_SIZE);
while (PURPLE_CONNECTION_IS_VALID(gc)) {
if (qd->openconns == NULL) {
break;
}
if (conn->tcp_rxqueue == NULL) {
conn->tcp_rxlen = 0;
break;
}
if (conn->tcp_rxlen < QQ_TCP_HEADER_LENGTH) {
break;
}
bytes = 0;
bytes += qq_get16(&pkt_len, conn->tcp_rxqueue + bytes);
if (conn->tcp_rxlen < pkt_len) {
break;
}
/* purple_debug_info("TCP_PENDING", "Packet len=%d, rxlen=%d\n", pkt_len, conn->tcp_rxlen); */
if ( pkt_len < QQ_TCP_HEADER_LENGTH
|| *(conn->tcp_rxqueue + bytes) != QQ_PACKET_TAG
|| *(conn->tcp_rxqueue + pkt_len - 1) != QQ_PACKET_TAIL) {
/* HEY! This isn't even a QQ. What are you trying to pull? */
purple_debug_warning("TCP_PENDING", "Packet error, no header or tail tag\n");
jump = memchr(conn->tcp_rxqueue + 1, QQ_PACKET_TAIL, conn->tcp_rxlen - 1);
if ( !jump ) {
purple_debug_warning("TCP_PENDING", "Failed to find next tail, clear receive buffer\n");
g_free(conn->tcp_rxqueue);
conn->tcp_rxqueue = NULL;
conn->tcp_rxlen = 0;
return;
}
/* jump and over QQ_PACKET_TAIL */
jump_len = (jump - conn->tcp_rxqueue) + 1;
purple_debug_warning("TCP_PENDING", "Find next tail at %d, jump %d\n", jump_len, jump_len + 1);
g_memmove(conn->tcp_rxqueue, jump, conn->tcp_rxlen - jump_len);
conn->tcp_rxlen -= jump_len;
continue;
}
memset(pkt, 0, MAX_PACKET_SIZE);
g_memmove(pkt, conn->tcp_rxqueue + bytes, pkt_len - bytes);
/* jump to next packet */
conn->tcp_rxlen -= pkt_len;
if (conn->tcp_rxlen) {
/* purple_debug_info("TCP_PENDING", "shrink tcp_rxqueue to %d\n", conn->tcp_rxlen); */
jump = g_memdup(conn->tcp_rxqueue + pkt_len, conn->tcp_rxlen);
g_free(conn->tcp_rxqueue);
conn->tcp_rxqueue = jump;
} else {
/* purple_debug_info("TCP_PENDING", "free tcp_rxqueue\n"); */
g_free(conn->tcp_rxqueue);
conn->tcp_rxqueue = NULL;
}
/* packet_process may call disconnect and destory data like conn
* do not call packet_process before jump,
* break if packet_process return FALSE */
if (packet_process(gc, pkt, pkt_len - bytes) == FALSE) {
purple_debug_info("TCP_PENDING", "Connection has been destory\n");
break;
}
}
}
static void udp_pending(gpointer data, gint source, PurpleInputCondition cond)
{
PurpleConnection *gc = NULL;
guint8 *buf;
gint buf_len;
gc = (PurpleConnection *) data;
g_return_if_fail(gc != NULL);
if(cond != PURPLE_INPUT_READ) {
purple_connection_error_reason(gc,
PURPLE_CONNECTION_ERROR_NETWORK_ERROR,
_("Socket error"));
return;
}
buf = g_newa(guint8, MAX_PACKET_SIZE);
/* here we have UDP proxy suppport */
buf_len = read(source, buf, MAX_PACKET_SIZE);
if (buf_len <= 0) {
purple_connection_error_reason(gc,
PURPLE_CONNECTION_ERROR_NETWORK_ERROR,
_("Unable to read from socket"));
return;
}
/* keep alive will be sent in 30 seconds since last_receive
* QQ need a keep alive packet in every 60 seconds
gc->last_received = time(NULL);
*/
if (buf_len < QQ_UDP_HEADER_LENGTH) {
if (buf[0] != QQ_PACKET_TAG || buf[buf_len - 1] != QQ_PACKET_TAIL) {
qq_hex_dump(PURPLE_DEBUG_ERROR, "UDP_PENDING",
buf, buf_len,
"Received packet is too short, or no header and tail tag");
return;
}
}
/* packet_process may call disconnect and destory data like conn
* do not call packet_process before jump,
* break if packet_process return FALSE */
packet_process(gc, buf, buf_len);
}
static gint udp_send_out(PurpleConnection *gc, guint8 *data, gint data_len)
{
qq_data *qd;
gint ret;
g_return_val_if_fail(data != NULL && data_len > 0, -1);
g_return_val_if_fail(gc != NULL && gc->proto_data != NULL, -1);
qd = (qq_data *) gc->proto_data;
#if 0
purple_debug_info("UDP_SEND_OUT", "Send %d bytes to socket %d\n", data_len, qd->fd);
#endif
errno = 0;
ret = send(qd->fd, data, data_len, 0);
if (ret < 0 && errno == EAGAIN) {
return ret;
}
if (ret < 0) {
/* TODO: what to do here - do we really have to disconnect? */
purple_debug_error("UDP_SEND_OUT", "Send failed: %d, %s\n", errno, g_strerror(errno));
purple_connection_error_reason(gc,
PURPLE_CONNECTION_ERROR_NETWORK_ERROR,
g_strerror(errno));
}
return ret;
}
static void tcp_can_write(gpointer data, gint source, PurpleInputCondition cond)
{
PurpleConnection *gc = (PurpleConnection *) data;
qq_data *qd;
qq_connection *conn;
int ret, writelen;
g_return_if_fail(gc != NULL && gc->proto_data != NULL);
qd = (qq_data *) gc->proto_data;
conn = connection_find(qd, source);
g_return_if_fail(conn != NULL);
writelen = purple_circ_buffer_get_max_read(conn->tcp_txbuf);
if (writelen == 0) {
purple_input_remove(conn->can_write_handler);
conn->can_write_handler = 0;
return;
}
ret = write(source, conn->tcp_txbuf->outptr, writelen);
purple_debug_info("TCP_CAN_WRITE", "total %d bytes is sent %d\n", writelen, ret);
if (ret < 0 && errno == EAGAIN)
return;
else if (ret < 0) {
/* TODO: what to do here - do we really have to disconnect? */
gchar *tmp = g_strdup_printf(_("Lost connection with server: %s"),
g_strerror(errno));
purple_connection_error_reason(gc,
PURPLE_CONNECTION_ERROR_NETWORK_ERROR, tmp);
g_free(tmp);
return;
}
purple_circ_buffer_mark_read(conn->tcp_txbuf, ret);
}
static gint tcp_send_out(PurpleConnection *gc, guint8 *data, gint data_len)
{
qq_data *qd;
qq_connection *conn;
gint ret;
g_return_val_if_fail(data != NULL && data_len > 0, -1);
g_return_val_if_fail(gc != NULL && gc->proto_data != NULL, -1);
qd = (qq_data *) gc->proto_data;
conn = connection_find(qd, qd->fd);
g_return_val_if_fail(conn, -1);
#if 0
purple_debug_info("TCP_SEND_OUT", "Send %d bytes to socket %d\n", data_len, qd->fd);
#endif
if (conn->can_write_handler == 0) {
ret = write(qd->fd, data, data_len);
} else {
ret = -1;
errno = EAGAIN;
}
/*
purple_debug_info("TCP_SEND_OUT",
"Socket %d, total %d bytes is sent %d\n", qd->fd, data_len, ret);
*/
if (ret < 0 && errno == EAGAIN) {
/* socket is busy, send later */
purple_debug_info("TCP_SEND_OUT", "Socket is busy and send later\n");
ret = 0;
} else if (ret <= 0) {
/* TODO: what to do here - do we really have to disconnect? */
gchar *tmp = g_strdup_printf(_("Lost connection with server: %s"),
g_strerror(errno));
purple_debug_error("TCP_SEND_OUT",
"Send to socket %d failed: %d, %s\n", qd->fd, errno, g_strerror(errno));
purple_connection_error_reason(gc,
PURPLE_CONNECTION_ERROR_NETWORK_ERROR, tmp);
g_free(tmp);
return ret;
}
if (ret < data_len) {
purple_debug_info("TCP_SEND_OUT", "Add %d bytes to buffer\n", data_len - ret);
if (conn->can_write_handler == 0) {
conn->can_write_handler = purple_input_add(qd->fd, PURPLE_INPUT_WRITE, tcp_can_write, gc);
}
if (conn->tcp_txbuf == NULL) {
conn->tcp_txbuf = purple_circ_buffer_new(4096);
}
purple_circ_buffer_append(conn->tcp_txbuf, data + ret, data_len - ret);
}
return ret;
}
static gboolean network_timeout(gpointer data)
{
PurpleConnection *gc = (PurpleConnection *) data;
qq_data *qd;
gboolean is_lost_conn;
g_return_val_if_fail(gc != NULL && gc->proto_data != NULL, TRUE);
qd = (qq_data *) gc->proto_data;
is_lost_conn = qq_trans_scan(gc);
if (is_lost_conn) {
purple_connection_error_reason(gc,
PURPLE_CONNECTION_ERROR_NETWORK_ERROR,
_("Lost connection with server"));
return TRUE;
}
if ( !qd->is_login ) {
return TRUE;
}
qd->itv_count.keep_alive--;
if (qd->itv_count.keep_alive <= 0) {
qd->itv_count.keep_alive = qd->itv_config.keep_alive;
qq_request_keep_alive(gc);
return TRUE;
}
if (qd->itv_config.update <= 0) {
return TRUE;
}
qd->itv_count.update--;
if (qd->itv_count.update <= 0) {
qd->itv_count.update = qd->itv_config.update;
qq_update_online(gc, 0);
return TRUE;
}
return TRUE; /* if return FALSE, timeout callback stops */
}
static void set_all_keys(PurpleConnection *gc)
{
qq_data *qd;
const gchar *passwd;
guint8 *dest;
int dest_len = QQ_KEY_LENGTH;
#ifndef DEBUG
int bytes;
#endif
/* _qq_show_socket("Got login socket", source); */
g_return_if_fail(gc != NULL && gc->proto_data != NULL);
qd = (qq_data *) gc->proto_data;
/* QQ use random seq, to minimize duplicated packets */
srand(time(NULL));
qd->send_seq = rand() & 0xffff;
qd->is_login = FALSE;
qd->uid = strtoul(purple_account_get_username(purple_connection_get_account(gc)), NULL, 10);
#ifdef DEBUG
memset(qd->ld.random_key, 0x01, sizeof(qd->ld.random_key));
#else
for (bytes = 0; bytes < sizeof(qd->ld.random_key); bytes++) {
qd->ld.random_key[bytes] = (guint8) (rand() & 0xff);
}
#endif
/* now generate md5 processed passwd */
passwd = purple_account_get_password(purple_connection_get_account(gc));
/* use twice-md5 of user password as session key since QQ 2003iii */
dest = qd->ld.pwd_md5;
qq_get_md5(dest, dest_len, (guint8 *)passwd, strlen(passwd));
dest = qd->ld.pwd_twice_md5;
qq_get_md5(dest, dest_len, qd->ld.pwd_md5, dest_len);
// password for 2011 or later
unsigned char source[24] = {0};
memcpy( source, qd->ld.pwd_md5, 16 );
*(unsigned int*)( &source[20] ) = htonl( qd->uid );
dest = qd->ld.pwd_qq_md5;
qq_get_md5(dest, dest_len, (guint8 *)source, 24);
}
/* the callback function after socket is built
* we setup the qq protocol related configuration here */
static void connect_cb(gpointer data, gint source, const gchar *error_message)
{
PurpleConnection *gc;
qq_data *qd;
qq_connection *conn;
gc = (PurpleConnection *) data;
g_return_if_fail(gc != NULL && gc->proto_data != NULL);
qd = (qq_data *) gc->proto_data;
/* conn_data will be destoryed */
qd->conn_data = NULL;
if (!PURPLE_CONNECTION_IS_VALID(gc)) {
purple_debug_info("QQ_CONN", "Invalid connection\n");
close(source);
return;
}
if (source < 0) { /* socket returns -1 */
purple_debug_info("QQ_CONN", "Could not establish a connection with the server:\n%s\n", error_message);
if (qd->connect_watcher > 0) purple_timeout_remove(qd->connect_watcher);
qd->connect_watcher = purple_timeout_add_seconds(QQ_CONNECT_INTERVAL, qq_connect_later, gc);
return;
}
/* _qq_show_socket("Got login socket", source); */
qd->fd = source;
conn = connection_create(qd, source);
if (qd->use_tcp) {
conn->input_handler = purple_input_add(source, PURPLE_INPUT_READ, tcp_pending, gc);
} else {
conn->input_handler = purple_input_add(source, PURPLE_INPUT_READ, udp_pending, gc);
}
g_return_if_fail(qd->network_watcher == 0);
qd->network_watcher = purple_timeout_add_seconds(qd->itv_config.resend, network_timeout, gc);
set_all_keys( gc );
purple_connection_update_progress(gc, _("Getting server"), 2, QQ_CONNECT_STEPS);
qq_request_touch_server(gc);
return;
}
#ifndef purple_proxy_connect_udp
static void udp_can_write(gpointer data, gint source, PurpleInputCondition cond)
{
PurpleConnection *gc;
qq_data *qd;
socklen_t len;
int error=0, ret;
gc = (PurpleConnection *) data;
g_return_if_fail(gc != NULL && gc->proto_data != NULL);
qd = (qq_data *) gc->proto_data;
purple_debug_info("proxy", "Connected.\n");
/*
* getsockopt after a non-blocking connect returns -1 if something is
* really messed up (bad descriptor, usually). Otherwise, it returns 0 and
* error holds what connect would have returned if it blocked until now.
* Thus, error == 0 is success, error == EINPROGRESS means "try again",
* and anything else is a real error.
*
* (error == EINPROGRESS can happen after a select because the kernel can
* be overly optimistic sometimes. select is just a hint that you might be
* able to do something.)
*/
len = sizeof(error);
ret = getsockopt(source, SOL_SOCKET, SO_ERROR, &error, &len);
if (ret == 0 && error == EINPROGRESS)
return; /* we'll be called again later */
purple_input_remove(qd->udp_can_write_handler);
qd->udp_can_write_handler = 0;
if (ret < 0 || error != 0) {
if(ret != 0)
error = errno;
close(source);
purple_debug_error("proxy", "getsockopt SO_ERROR check: %s\n", g_strerror(error));
connect_cb(gc, -1, _("Unable to connect"));
return;
}
connect_cb(gc, source, NULL);
}
static void udp_host_resolved(GSList *hosts, gpointer data, const char *error_message) {
PurpleConnection *gc;
qq_data *qd;
struct sockaddr server_addr;
int addr_size;
gint fd = -1;
int flags;
gc = (PurpleConnection *) data;
g_return_if_fail(gc != NULL && gc->proto_data != NULL);
qd = (qq_data *) gc->proto_data;
/* udp_query_data must be set as NULL.
* Otherwise purple_dnsquery_destroy in qq_disconnect cause glib double free error */
qd->udp_query_data = NULL;
if (!hosts || !hosts->data) {
purple_connection_error_reason(gc,
PURPLE_CONNECTION_ERROR_NETWORK_ERROR,
_("Unable to resolve hostname"));
return;
}
addr_size = GPOINTER_TO_INT(hosts->data);
hosts = g_slist_remove(hosts, hosts->data);
memcpy(&server_addr, hosts->data, addr_size);
g_free(hosts->data);
hosts = g_slist_remove(hosts, hosts->data);
while(hosts) {
hosts = g_slist_remove(hosts, hosts->data);
g_free(hosts->data);
hosts = g_slist_remove(hosts, hosts->data);
}
fd = socket(PF_INET, SOCK_DGRAM, 0);
if (fd < 0) {
purple_debug_error("QQ",
"Unable to create socket: %s\n", g_strerror(errno));
return;
}
/* we use non-blocking mode to speed up connection */
flags = fcntl(fd, F_GETFL);
fcntl(fd, F_SETFL, flags | O_NONBLOCK);
#ifndef _WIN32
fcntl(fd, F_SETFD, FD_CLOEXEC);
#endif
/* From Unix-socket-FAQ: http://www.faqs.org/faqs/unix-faq/socket/
*
* If a UDP socket is unconnected, which is the normal state after a
* bind() call, then send() or write() are not allowed, since no
* destination is available; only sendto() can be used to send data.
*
* Calling connect() on the socket simply records the specified address
* and port number as being the desired communications partner. That
* means that send() or write() are now allowed; they use the destination
* address and port given on the connect call as the destination of packets.
*/
if (connect(fd, &server_addr, addr_size) >= 0) {
purple_debug_info("QQ", "Connected.\n");
flags = fcntl(fd, F_GETFL);
fcntl(fd, F_SETFL, flags & ~O_NONBLOCK);
connect_cb(gc, fd, NULL);
return;
}
/* [EINPROGRESS]
* The socket is marked as non-blocking and the connection cannot be
* completed immediately. It is possible to select for completion by
* selecting the socket for writing.
* [EINTR]
* A signal interrupted the call.
* The connection is established asynchronously.
*/
if ((errno == EINPROGRESS) || (errno == EINTR)) {
purple_debug_warning( "QQ", "Connect in asynchronous mode.\n");
qd->udp_can_write_handler = purple_input_add(fd, PURPLE_INPUT_WRITE, udp_can_write, gc);
return;
}
purple_debug_error("QQ", "Connection failed: %s\n", g_strerror(errno));
close(fd);
}
#endif
gboolean connect_to_server(PurpleConnection *gc, gchar *server, gint port)
{
PurpleAccount *account ;
qq_data *qd;
g_return_val_if_fail(gc != NULL && gc->proto_data != NULL, FALSE);
account = purple_connection_get_account(gc);
qd = (qq_data *) gc->proto_data;
if (server == NULL || server[0] == '\0' || port == 0) {
purple_connection_error_reason(gc,
PURPLE_CONNECTION_ERROR_NETWORK_ERROR,
_("Invalid server or port"));
return FALSE;
}
purple_connection_update_progress(gc, _("Connecting to server"), 1, QQ_CONNECT_STEPS);
purple_debug_info("QQ", "Connect to %s:%d\n", server, port);
if (qd->conn_data != NULL) {
purple_proxy_connect_cancel(qd->conn_data);
qd->conn_data = NULL;
}
#ifdef purple_proxy_connect_udp
if (qd->use_tcp) {
qd->conn_data = purple_proxy_connect(gc, account, server, port, connect_cb, gc);
} else {
qd->conn_data = purple_proxy_connect_udp(gc, account, server, port, connect_cb, gc);
}
if ( qd->conn_data == NULL ) {
purple_debug_error("QQ", "Couldn't create socket\n");
return FALSE;
}
#else
/* QQ connection via UDP/TCP.
* Now use Purple proxy function to provide TCP proxy support,
* and qq_udp_proxy.c to add UDP proxy support (thanks henry) */
if(qd->use_tcp) {
qd->conn_data = purple_proxy_connect(gc, account, server, port, connect_cb, gc);
if ( qd->conn_data == NULL ) {
purple_debug_error("QQ", "Unable to connect.\n");
return FALSE;
}
return TRUE;
}
purple_debug_info("QQ", "UDP Connect to %s:%d\n", server, port);
qd->udp_query_data = purple_dnsquery_a(server, port, udp_host_resolved, gc);
if ( qd->udp_query_data == NULL ) {
purple_debug_error("QQ", "Could not resolve hostname\n");
return FALSE;
}
#endif
return TRUE;
}
/* clean up qq_data structure and all its components
* always used before a redirectly connection */
void qq_disconnect(PurpleConnection *gc)
{
qq_data *qd;