buddy_list.c

Linux下的多协议即时通讯程序源代码

/**
 * @file buddy_list.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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <string.h>
#include "debug.h"

#include "notify.h"
#include "utils.h"
#include "packet_parse.h"
#include "buddy_info.h"
#include "buddy_list.h"
#include "buddy_status.h"
#include "buddy_opt.h"
#include "char_conv.h"
#include "crypt.h"
#include "header_info.h"
#include "keep_alive.h"	
#include "send_core.h"
#include "qq.h"	
#include "group.h"
#include "group_find.h"
#include "group_internal.h"
#include "group_info.h"

#include "qq_proxy.h"

#define QQ_GET_ONLINE_BUDDY_02          0x02
#define QQ_GET_ONLINE_BUDDY_03          0x03	/* unknown function */

#define QQ_ONLINE_BUDDY_ENTRY_LEN       38

typedef struct _qq_friends_online_entry {
	qq_buddy_status *s;
	guint16 unknown1;
	guint8 flag1;
	guint8 comm_flag;
	guint16 unknown2;
	guint8 ending;		/* 0x00 */
} qq_friends_online_entry;

/* get a list of online_buddies */
void qq_send_packet_get_buddies_online(PurpleConnection *gc, guint8 position)
{
	qq_data *qd;
	guint8 *raw_data, *cursor;

	qd = (qq_data *) gc->proto_data;
	raw_data = g_newa(guint8, 5);
	cursor = raw_data;

	/* 000-000 get online friends cmd
	 * only 0x02 and 0x03 returns info from server, other valuse all return 0xff
	 * I can also only send the first byte (0x02, or 0x03)
	 * and the result is the same */
	create_packet_b(raw_data, &cursor, QQ_GET_ONLINE_BUDDY_02);
	/* 001-001 seems it supports 255 online buddies at most */
	create_packet_b(raw_data, &cursor, position);
	/* 002-002 */
	create_packet_b(raw_data, &cursor, 0x00);
	/* 003-004 */
	create_packet_w(raw_data, &cursor, 0x0000);

	qq_send_cmd(gc, QQ_CMD_GET_FRIENDS_ONLINE, TRUE, 0, TRUE, raw_data, 5);
	qd->last_get_online = time(NULL);
}

/* position starts with 0x0000, 
 * server may return a position tag if list is too long for one packet */
void qq_send_packet_get_buddies_list(PurpleConnection *gc, guint16 position)
{
	guint8 *raw_data, *cursor;
	gint data_len;

	data_len = 3;
	raw_data = g_newa(guint8, data_len);
	cursor = raw_data;
	/* 000-001 starting position, can manually specify */
	create_packet_w(raw_data, &cursor, position);
	/* before Mar 18, 2004, any value can work, and we sent 00
	 * I do not know what data QQ server is expecting, as QQ2003iii 0304 itself
	 * even can sending packets 00 and get no response.
	 * Now I tested that 00,00,00,00,00,01 work perfectly
	 * March 22, found the 00,00,00 starts to work as well */
	create_packet_b(raw_data, &cursor, 0x00);

	qq_send_cmd(gc, QQ_CMD_GET_FRIENDS_LIST, TRUE, 0, TRUE, raw_data, data_len);
}

/* get all list, buddies & Quns with groupsid support */
void qq_send_packet_get_all_list_with_group(PurpleConnection *gc, guint32 position)
{
	guint8 *raw_data, *cursor;
	gint data_len;

	data_len = 10;
	raw_data = g_newa(guint8, data_len);
	cursor = raw_data;
	/* 0x01 download, 0x02, upload */
	create_packet_b(raw_data, &cursor, 0x01);
	/* unknown 0x02 */
	create_packet_b(raw_data, &cursor, 0x02);
	/* unknown 00 00 00 00 */
	create_packet_dw(raw_data, &cursor, 0x00000000);
	create_packet_dw(raw_data, &cursor, position);

	qq_send_cmd(gc, QQ_CMD_GET_ALL_LIST_WITH_GROUP, TRUE, 0, TRUE, raw_data, data_len);
}

static void _qq_buddies_online_reply_dump_unclear(qq_friends_online_entry *fe)
{
	GString *dump;

	g_return_if_fail(fe != NULL);

	qq_buddy_status_dump_unclear(fe->s);

	dump = g_string_new("");
	g_string_append_printf(dump, "unclear fields for [%d]:\n", fe->s->uid);
	g_string_append_printf(dump, "031-032: %04x (unknown)\n", fe->unknown1);
	g_string_append_printf(dump, "033:     %02x   (flag1)\n", fe->flag1);
	g_string_append_printf(dump, "034:     %02x   (comm_flag)\n", fe->comm_flag);
	g_string_append_printf(dump, "035-036: %04x (unknown)\n", fe->unknown2);

	purple_debug(PURPLE_DEBUG_INFO, "QQ", "Online buddy entry, %s", dump->str);
	g_string_free(dump, TRUE);
}

/* process the reply packet for get_buddies_online packet */
void qq_process_get_buddies_online_reply(guint8 *buf, gint buf_len, PurpleConnection *gc)
{
	qq_data *qd;
	gint len, bytes;
	guint8 *data, *cursor, position;
	PurpleBuddy *b;
	qq_buddy *q_bud;
	qq_friends_online_entry *fe;

	g_return_if_fail(buf != NULL && buf_len != 0);

	qd = (qq_data *) gc->proto_data;
	len = buf_len;
	data = g_newa(guint8, len);
	cursor = data;

	purple_debug(PURPLE_DEBUG_INFO, "QQ", "processing get_buddies_online_reply\n");
	
	if (qq_crypt(DECRYPT, buf, buf_len, qd->session_key, data, &len)) {

		_qq_show_packet("Get buddies online reply packet", data, len);

		read_packet_b(data, &cursor, len, &position);

		fe = g_newa(qq_friends_online_entry, 1);
		fe->s = g_newa(qq_buddy_status, 1);

		while (cursor < (data + len)) {
			/* based on one online buddy entry */
			bytes = 0;
			/* 000-030 qq_buddy_status */
			bytes += qq_buddy_status_read(data, &cursor, len, fe->s);
			/* 031-032: unknown4 */
			bytes += read_packet_w(data, &cursor, len, &fe->unknown1);
			/* 033-033: flag1 */
			bytes += read_packet_b(data, &cursor, len, &fe->flag1);
			/* 034-034: comm_flag */
			bytes += read_packet_b(data, &cursor, len, &fe->comm_flag);
			/* 035-036: */
			bytes += read_packet_w(data, &cursor, len, &fe->unknown2);
			/* 037-037: */
			bytes += read_packet_b(data, &cursor, len, &fe->ending);	/* 0x00 */

			if (fe->s->uid == 0 || bytes != QQ_ONLINE_BUDDY_ENTRY_LEN) {
				purple_debug(PURPLE_DEBUG_ERROR, "QQ", 
						"uid=0 or entry complete len(%d) != %d", 
						bytes, QQ_ONLINE_BUDDY_ENTRY_LEN);
				g_free(fe->s->ip);
				g_free(fe->s->unknown_key);
				continue;
			}	/* check if it is a valid entry */

			if (QQ_DEBUG)
				_qq_buddies_online_reply_dump_unclear(fe);

			/* update buddy information */
			b = purple_find_buddy(purple_connection_get_account(gc), uid_to_purple_name(fe->s->uid));
			q_bud = (b == NULL) ? NULL : (qq_buddy *) b->proto_data;

			if (q_bud != NULL) {	/* we find one and update qq_buddy */
				if(0 != fe->s->client_version)
					q_bud->client_version = fe->s->client_version;
				g_memmove(q_bud->ip, fe->s->ip, 4);
				q_bud->port = fe->s->port;
				q_bud->status = fe->s->status;
				q_bud->flag1 = fe->flag1;
				q_bud->comm_flag = fe->comm_flag;
				qq_update_buddy_contact(gc, q_bud);
			} else {
				purple_debug(PURPLE_DEBUG_ERROR, "QQ", 
						"Got an online buddy %d, but not in my buddy list\n", fe->s->uid);
			}

			g_free(fe->s->ip);
			g_free(fe->s->unknown_key);
		}
		
		if(cursor > (data + len)) {
			 purple_debug(PURPLE_DEBUG_ERROR, "QQ", 
					"qq_process_get_buddies_online_reply: Dangerous error! maybe protocol changed, notify developers!\n");
		}

		if (position != QQ_FRIENDS_ONLINE_POSITION_END) {
			purple_debug(PURPLE_DEBUG_INFO, "QQ", "Has more online buddies, position from %d\n", position);

			qq_send_packet_get_buddies_online(gc, position);
		} else {
			qq_send_packet_get_buddies_levels(gc);
			qq_refresh_all_buddy_status(gc);
		}

	} else {
		purple_debug(PURPLE_DEBUG_ERROR, "QQ", "Error decrypt buddies online");
	}
}

/* process reply for get_buddies_list */
void qq_process_get_buddies_list_reply(guint8 *buf, gint buf_len, PurpleConnection *gc)
{
	qq_data *qd;
	qq_buddy *q_bud;
	gint len, bytes, bytes_expected, i;
	guint16 position, unknown;
	guint8 *data, *cursor, pascal_len;
	gchar *name;
	PurpleBuddy *b;

	g_return_if_fail(buf != NULL && buf_len != 0);

	qd = (qq_data *) gc->proto_data;
	len = buf_len;
	data = g_newa(guint8, len);
	cursor = data;

	if (qq_crypt(DECRYPT, buf, buf_len, qd->session_key, data, &len)) {
		read_packet_w(data, &cursor, len, &position);
		/* the following data is buddy list in this packet */
		i = 0;
		while (cursor < (data + len)) {
			q_bud = g_new0(qq_buddy, 1);
			bytes = 0;
			/* 000-003: uid */
			bytes += read_packet_dw(data, &cursor, len, &q_bud->uid);
			/* 004-005: icon index (1-255) */
			bytes += read_packet_w(data, &cursor, len, &q_bud->face);
			/* 006-006: age */
			bytes += read_packet_b(data, &cursor, len, &q_bud->age);
			/* 007-007: gender */
			bytes += read_packet_b(data, &cursor, len, &q_bud->gender);
			pascal_len = convert_as_pascal_string(cursor, &q_bud->nickname, QQ_CHARSET_DEFAULT);
			cursor += pascal_len;
			bytes += pascal_len;
			bytes += read_packet_w(data, &cursor, len, &unknown);
			/* flag1: (0-7)
			 *        bit1 => qq show
			 * comm_flag: (0-7)
			 *        bit1 => member
			 *        bit4 => TCP mode
			 *        bit5 => open mobile QQ
			 *        bit6 => bind to mobile
			 *        bit7 => whether having a video
			 */
			bytes += read_packet_b(data, &cursor, len, &q_bud->flag1);
			bytes += read_packet_b(data, &cursor, len, &q_bud->comm_flag);

			bytes_expected = 12 + pascal_len;

			if (q_bud->uid == 0 || bytes != bytes_expected) {
				purple_debug(PURPLE_DEBUG_INFO, "QQ",
					   "Buddy entry, expect %d bytes, read %d bytes\n", bytes_expected, bytes);
				g_free(q_bud->nickname);
				g_free(q_bud);
				continue;
			} else {
				i++;
			}

			if (QQ_DEBUG) {
				purple_debug(PURPLE_DEBUG_INFO, "QQ",
					   "buddy [%09d]: flag1=0x%02x, comm_flag=0x%02x\n",
					   q_bud->uid, q_bud->flag1, q_bud->comm_flag);
			}

			name = uid_to_purple_name(q_bud->uid);
			b = purple_find_buddy(gc->account, name);
			g_free(name);

			if (b == NULL)
				b = qq_add_buddy_by_recv_packet(gc, q_bud->uid, TRUE, FALSE);

			b->proto_data = q_bud;
			qd->buddies = g_list_append(qd->buddies, q_bud);
			qq_update_buddy_contact(gc, q_bud);
		}

		if(cursor > (data + len)) {
			purple_debug(PURPLE_DEBUG_ERROR, "QQ", 
					"qq_process_get_buddies_list_reply: Dangerous error! maybe protocol changed, notify developers!");
                }
		if (position == QQ_FRIENDS_LIST_POSITION_END) {
			purple_debug(PURPLE_DEBUG_INFO, "QQ", "Get friends list done, %d buddies\n", i);
			qq_send_packet_get_buddies_online(gc, QQ_FRIENDS_ONLINE_POSITION_START);
		} else {
			qq_send_packet_get_buddies_list(gc, position);
		}
	} else {
		purple_debug(PURPLE_DEBUG_ERROR, "QQ", "Error decrypt buddies list");
	}
}

void qq_process_get_all_list_with_group_reply(guint8 *buf, gint buf_len, PurpleConnection *gc)
{
	qq_data *qd;
	gint len, i, j;
	guint8 *data, *cursor;
	guint8 sub_cmd, reply_code;
	guint32 unknown, position;
	guint32 uid;
	guint8 type, groupid;
	qq_group *group;

	g_return_if_fail(buf != NULL && buf_len != 0);

	qd = (qq_data *) gc->proto_data;
	len = buf_len;
	data = g_newa(guint8, len);
	cursor = data;

	if (qq_crypt(DECRYPT, buf, buf_len, qd->session_key, data, &len)) {
		read_packet_b(data, &cursor, len, &sub_cmd);
		g_return_if_fail(sub_cmd == 0x01);
		read_packet_b(data, &cursor, len, &reply_code);
		if(0 != reply_code) {
			purple_debug(PURPLE_DEBUG_WARNING, "QQ", 
					"Get all list with group reply, reply_code(%d) is not zero", reply_code);
		}
		read_packet_dw(data, &cursor, len, &unknown);
		read_packet_dw(data, &cursor, len, &position);
		/* the following data is all list in this packet */
		i = 0;
		j = 0;
		while (cursor < (data + len)) {
			/* 00-03: uid */
			read_packet_dw(data, &cursor, len, &uid);
			/* 04: type 0x1:buddy 0x4:Qun */
			read_packet_b(data, &cursor, len, &type);
			/* 05: groupid*4 */ /* seems to always be 0 */
			read_packet_b(data, &cursor, len, &groupid);
			/*
			purple_debug(PURPLE_DEBUG_INFO, "QQ", "groupid: %i\n", groupid);
			groupid >>= 2;
			*/
			if (uid == 0 || (type != 0x1 && type != 0x4)) {
				purple_debug(PURPLE_DEBUG_INFO, "QQ",
					   "Buddy entry, uid=%d, type=%d", uid, type);
				continue;
			} 
			if(0x1 == type) { /* a buddy */
				/* don't do anything but count - buddies are handled by 
				 * qq_send_packet_get_buddies_list */
				++i;
			} else { /* a group */
				group = qq_group_find_by_id(gc, uid, QQ_INTERNAL_ID);
				if(group == NULL) {
					qq_set_pending_id(&qd->adding_groups_from_server, uid, TRUE);
					group = g_newa(qq_group, 1);
					group->internal_group_id = uid;
					qq_send_cmd_group_get_group_info(gc, group);
				} else {
					group->my_status = QQ_GROUP_MEMBER_STATUS_IS_MEMBER;
					qq_group_refresh(gc, group);
					qq_send_cmd_group_get_group_info(gc, group);
				}
				++j;
			}
		}
		if(cursor > (data + len)) {
			 purple_debug(PURPLE_DEBUG_ERROR, "QQ", 
					"qq_process_get_all_list_with_group_reply: Dangerous error! maybe protocol changed, notify developers!");
		}
		purple_debug(PURPLE_DEBUG_INFO, "QQ", "Get all list done, %d buddies and %d Quns\n", i, j);
	} else {
		purple_debug(PURPLE_DEBUG_ERROR, "QQ", "Error decrypt all list with group");
	}
}