handle_udp.c
上传用户:tany51
上传日期:2013-06-12
资源大小:1397k
文件大小:5k
- /*
- * Copyright (C) 1999,2000,2001 Ross Combs (rocombs@cs.nmsu.edu)
- *
- * 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 "common/setup_before.h"
- #include "common/packet.h"
- #include "common/udp_protocol.h"
- #include "common/eventlog.h"
- #include "connection.h"
- #include "common/queue.h"
- #include "common/bn_type.h"
- #include "common/addr.h"
- #include "udptest_send.h"
- #include "handle_udp.h"
- #include "common/setup_after.h"
- extern int handle_udp_packet(int usock, unsigned int src_addr, unsigned short src_port, t_packet const * const packet)
- {
- if (!packet)
- {
- eventlog(eventlog_level_error,"handle_udp_packet","[%d] got NULL packet",usock);
- return -1;
- }
- if (packet_get_class(packet)!=packet_class_udp)
- {
- eventlog(eventlog_level_error,"handle_udp_packet","[%d] got bad packet (class %d)",usock,(int)packet_get_class(packet));
- return -1;
- }
-
- switch (packet_get_type(packet))
- {
- case SERVER_UDPTEST: /* we might get these if a client is running on the same machine as us */
- if (packet_get_size(packet)<sizeof(t_server_udptest))
- {
- eventlog(eventlog_level_error,"handle_udp_packet","[%d] got bad UDPTEST packet (expected %u bytes, got %u)",usock,sizeof(t_server_udptest),packet_get_size(packet));
- return -1;
- }
- eventlog(eventlog_level_debug,"handle_udp_packet","[%d] got UDPTEST packet from %s (myself?)",usock,addr_num_to_addr_str(src_addr,src_port));
- return 0;
-
- case CLIENT_UDPPING:
- if (packet_get_size(packet)<sizeof(t_client_udpping))
- {
- eventlog(eventlog_level_error,"handle_udp_packet","[%d] got bad UDPPING packet (expected %u bytes, got %u)",usock,sizeof(t_client_udpping),packet_get_size(packet));
- return -1;
- }
- eventlog(eventlog_level_debug,"handle_udp_packet","[%d] got udpping unknown1=%u",usock,bn_int_get(packet->u.client_udpping.unknown1));
- return 0;
-
- case CLIENT_SESSIONADDR1:
- if (packet_get_size(packet)<sizeof(t_client_sessionaddr1))
- {
- eventlog(eventlog_level_error,"handle_udp_packet","[%d] got bad SESSIONADDR1 packet (expected %u bytes, got %u)",usock,sizeof(t_client_sessionaddr1),packet_get_size(packet));
- return -1;
- }
-
- {
- t_connection * c;
-
- if (!(c = connlist_find_connection_by_sessionkey(bn_int_get(packet->u.client_sessionaddr1.sessionkey))))
- {
- eventlog(eventlog_level_error,"handle_udp_packet","[%d] address not set (no connection with session key 0x%08x)",usock,bn_int_get(packet->u.client_sessionaddr1.sessionkey));
- return -1;
- }
-
- if (conn_get_game_addr(c)!=src_addr || conn_get_game_port(c)!=src_port)
- eventlog(eventlog_level_info,"handle_udp_packet","[%d][%d] SESSIONADDR1 set new UDP address to %s",conn_get_socket(c),usock,addr_num_to_addr_str(src_addr,src_port));
-
- conn_set_game_socket(c,usock);
- conn_set_game_addr(c,src_addr);
- conn_set_game_port(c,src_port);
-
- udptest_send(c);
- }
- return 0;
-
- case CLIENT_SESSIONADDR2:
- if (packet_get_size(packet)<sizeof(t_client_sessionaddr2))
- {
- eventlog(eventlog_level_error,"handle_udp_packet","[%d] got bad SESSIONADDR2 packet (expected %u bytes, got %u)",usock,sizeof(t_client_sessionaddr2),packet_get_size(packet));
- return -1;
- }
-
- {
- t_connection * c;
-
- if (!(c = connlist_find_connection_by_sessionnum(bn_int_get(packet->u.client_sessionaddr2.sessionnum))))
- {
- eventlog(eventlog_level_error,"handle_udp_packet","[%d] address not set (no connection with session number %u)",usock,bn_int_get(packet->u.client_sessionaddr2.sessionnum));
- return -1;
- }
- if (conn_get_sessionkey(c)!=bn_int_get(packet->u.client_sessionaddr2.sessionkey))
- {
- eventlog(eventlog_level_error,"handle_udp_packet","[%d][%d] address not set (expected session key 0x%08x, got 0x%08x)",conn_get_socket(c),usock,conn_get_sessionkey(c),bn_int_get(packet->u.client_sessionaddr2.sessionkey));
- return -1;
- }
-
- if (conn_get_game_addr(c)!=src_addr || conn_get_game_port(c)!=src_port)
- eventlog(eventlog_level_info,"handle_udp_packet","[%d][%d] SESSIONADDR2 set new UDP address to %s",conn_get_socket(c),usock,addr_num_to_addr_str(src_addr,src_port));
-
- conn_set_game_socket(c,usock);
- conn_set_game_addr(c,src_addr);
- conn_set_game_port(c,src_port);
-
- udptest_send(c);
- }
- return 0;
- case CLIENT_SEARCH_LAN_GAMES: //added by Spider
- {
- eventlog(eventlog_level_debug,__FUNCTION__,"[%d] got SEARCH_LAN_GAMES packet from %s",usock,addr_num_to_addr_str(src_addr,src_port));
- return 0;
- }
-
- default:
- eventlog(eventlog_level_error,"handle_udp_packet","[%d] got unknown udp packet type 0x%04x, len %u from %s",usock,(unsigned int)packet_get_type(packet),packet_get_size(packet),addr_num_to_addr_str(src_addr,src_port));
- }
-
- return 0;
- }