2 * Copyright (C) Volition, Inc. 1999. All rights reserved.
4 * All source code herein is the property of Volition, Inc. You may not sell
5 * or otherwise commercially exploit the source or things you created based on
10 * $Logfile: /Freespace2/code/Network/Psnet2.cpp $
15 * C file containing application level network-interface.
18 * Revision 1.14 2005/10/02 09:30:10 taylor
19 * sync up rest of big-endian network changes. it should at least be as good as what's in FS2_Open now, only better :)
21 * Revision 1.13 2005/10/01 22:01:28 taylor
22 * some cleanup of earlier big-endian changes
24 * Revision 1.12 2004/07/04 11:39:06 taylor
25 * fix missing debrief text, crash on exit, path separator's, warning fixes, no GR_SOFT
27 * Revision 1.11 2004/06/11 01:52:15 tigital
28 * byte-swapping changes for bigendian systems
30 * Revision 1.10 2003/08/03 16:10:30 taylor
31 * cleanup; compile warning fixes
33 * Revision 1.9 2002/07/27 19:52:54 relnev
34 * add missing structure packing
36 * Revision 1.8 2002/06/09 04:41:24 relnev
37 * added copyright header
39 * Revision 1.7 2002/06/02 05:31:17 relnev
42 * Revision 1.6 2002/06/02 02:29:39 relnev
45 * Revision 1.5 2002/05/27 04:04:43 relnev
46 * 155 undefined references left
48 * Revision 1.4 2002/05/26 21:27:53 theoddone33
49 * More progress (I hate psnet2)
51 * Revision 1.3 2002/05/26 20:49:54 theoddone33
54 * Revision 1.2 2002/05/07 03:16:48 theoddone33
55 * The Great Newline Fix
57 * Revision 1.1.1.1 2002/05/03 03:28:10 root
61 * 25 9/14/99 2:21p Dave
62 * Fixed observer mode joining and ingame stuff.
64 * 24 9/10/99 9:44p Dave
65 * Bumped version # up. Make server reliable connects not have such a huge
68 * 23 9/07/99 4:01p Dave
69 * Fixed up a string.tbl paroblem (self destruct message). Make sure IPX
70 * does everything properly (setting up address when binding). Remove
71 * black rectangle background from UI_INPUTBOX.
73 * 22 8/26/99 8:51p Dave
74 * Gave multiplayer TvT messaging a heavy dose of sanity. Cheat codes.
76 * 21 8/16/99 4:06p Dave
77 * Big honking checkin.
79 * 20 7/26/99 5:50p Dave
80 * Revised ingame join. Better? We'll see....
82 * 19 7/20/99 1:49p Dave
83 * Peter Drake build. Fixed some release build warnings.
85 * 18 7/15/99 9:20a Andsager
86 * FS2_DEMO initial checkin
88 * 17 7/03/99 4:08p Dave
89 * Fixed wss_slots size issues. Fixed potentially nasty bug in low level
92 * 16 6/25/99 5:02p Jasenw
93 * Removed old debug code.
95 * 15 6/07/99 9:51p Dave
96 * Consolidated all multiplayer ports into one.
98 * 14 4/30/99 12:18p Dave
99 * Several minor bug fixes.
101 * 13 4/27/99 5:55p Dave
102 * Fixed Ras_connected bug with VSDK code.
104 * 12 4/27/99 2:59p Dave
105 * Potential fix for reliable socket connection problem.
107 * 11 4/23/99 11:07a Dave
108 * Added lots of debug multi.log output to psnet2
110 * 10 4/12/99 10:07p Dave
111 * Made network startup more forgiving. Added checkmarks to dogfight
112 * screen for players who hit commit.
114 * 9 3/10/99 6:50p Dave
115 * Changed the way we buffer packets for all clients. Optimized turret
116 * fired packets. Did some weapon firing optimizations.
118 * 8 3/09/99 6:24p Dave
119 * More work on object update revamping. Identified several sources of
120 * unnecessary bandwidth.
122 * 7 3/08/99 7:03p Dave
123 * First run of new object update system. Looks very promising.
125 * 6 1/24/99 11:37p Dave
126 * First full rev of beam weapons. Very customizable. Removed some bogus
127 * Int3()'s in low level net code.
129 * 5 1/06/99 2:24p Dave
130 * Stubs and release build fixes.
132 * 4 11/20/98 11:16a Dave
133 * Fixed up IPX support a bit. Making sure that switching modes and
134 * loading/saving pilot files maintains proper state.
136 * 3 11/19/98 4:19p Dave
137 * Put IPX sockets back in psnet. Consolidated all multiplayer config
140 * 2 11/19/98 8:04a Dave
141 * Full support for D3-style reliable sockets. Revamped packet lag/loss
142 * system, made it receiver side and at the lowest possible level.
149 #include <windowsx.h>
153 #include <raserror.h>
155 #include <sys/types.h>
156 #include <sys/socket.h>
157 #include <netinet/in.h>
158 #include <arpa/inet.h>
168 #include "multiutil.h"
169 #include "multilag.h"
170 #include "osregistry.h"
172 #include "multi_log.h"
173 #include "multi_rate.h"
178 // -------------------------------------------------------------------------------------------------------
179 // PSNET 2 DEFINES/VARS
182 int Psnet_my_addr_valid;
183 net_addr_t Psnet_my_addr;
185 const ubyte Null_address[4] = { 0x00, 0x00, 0x00, 0x00 };
188 int Can_broadcast; // can we do broadcasting on our socket?
189 int Tcp_can_broadcast = 0;
194 int Tcp_failure_code = 0;
196 int Psnet_connection;
198 ushort Psnet_default_port;
200 // specified their internet connnection type
201 #define NETWORK_CONNECTION_NONE 1
202 #define NETWORK_CONNECTION_DIALUP 2
203 #define NETWORK_CONNECTION_LAN 3
205 // defines and variables to indicate network connection status
206 #define NETWORK_STATUS_NOT_INITIALIZED 1
207 #define NETWORK_STATUS_NO_WINSOCK 2 // winsock failed to initialize
208 #define NETWORK_STATUS_NO_PROTOCOL 3 // TCP/IP doesn't appear to be loaded
209 #define NETWORK_STATUS_NO_RELIABLE 4
210 #define NETWORK_STATUS_RUNNING 5 // everything should be running
212 // defintion of structures that actually leave this machine. psnet_send give us only
213 // the data that we want to send. We will add a header onto this data (packet sequence
214 // number, possibly a checksum). We must include a 2 byte flags variable into both structure
215 // since the receiving end of this packet must know whether or not to checksum the packet.
217 #define MAX_TOP_LAYER_PACKET_SIZE 680
219 // use the pack pragma to pack these structures to 2 byte aligment. Really only needed for
221 #define MAX_PACKET_BUFFERS 75
224 #pragma pack(push, 2)
227 // definition for a non-checksum packet
228 typedef struct network_packet
232 ubyte data[MAX_TOP_LAYER_PACKET_SIZE];
233 } network_naked_packet;
235 // structure definition for our packet buffers
236 typedef struct network_packet_buffer
240 net_addr_t from_addr;
241 ubyte data[MAX_TOP_LAYER_PACKET_SIZE];
242 } network_packet_buffer;
244 // struct for a bunch of network packet buffers
245 typedef struct network_packet_buffer_list {
246 network_packet_buffer psnet_buffers[MAX_PACKET_BUFFERS];
247 int psnet_seq_number;
249 int psnet_highest_id;
250 } network_packet_buffer_list;
257 #define MAXHOSTNAME 128
259 #define MAX_RECEIVE_BUFSIZE 4096 // 32 K, eh?
260 #define MAX_SEND_RETRIES 20 // number of retries when sending would block
261 #define MAX_LINGER_TIME 0 // in seconds -- when lingering to close a socket
264 //*******************************
265 #define MAXNETBUFFERS 150 // Maximum network buffers (For between network and upper level functions, which is
266 // required in case of out of order packets
267 #define NETRETRYTIME 0.75f // Time after sending before we resend
268 #define MIN_NET_RETRYTIME 0.2f
269 #define NETTIMEOUT 30 // Time after receiving the last packet before we drop that user
270 #define NETHEARTBEATTIME 3 // How often to send a heartbeat
271 #define MAXRELIABLESOCKETS 40 // Max reliable sockets to open at once...
272 #define NETBUFFERSIZE 600 // Max size of a network packet
274 #define RELIABLE_CONNECT_TIME 7 // how long we'll wait for a response when doing a reliable connect
276 int Nettimeout = NETTIMEOUT;
278 // Reliable packet stuff
279 #define RNT_ACK 1 // ACK Packet
280 #define RNT_DATA 2 // Data Packet
281 #define RNT_DATA_COMP 3 // Compressed Data Packet
282 #define RNT_REQ_CONN 4 // Requesting a connection
283 #define RNT_DISCONNECT 5 // Disconnecting a connection
284 #define RNT_HEARTBEAT 6 // Heartbeat -- send every NETHEARTBEATTIME
285 #define RNT_I_AM_HERE 7
288 #pragma pack(push,r_udp)
292 #define PACKED __attribute__((packed))
296 ubyte type; // packet type
298 ushort seq; // sequence packet 0-65535 used for ACKing also
299 ushort data_len; // length of data
300 float send_time; // Time the packet was sent, if an ACK the time the packet being ACK'd was sent.
301 ubyte data[NETBUFFERSIZE]; // Packet data
302 } PACKED reliable_header;
304 #define RELIABLE_PACKET_HEADER_ONLY_SIZE (sizeof(reliable_header)-NETBUFFERSIZE)
305 #define MAX_PING_HISTORY 10
308 ubyte buffer[NETBUFFERSIZE];
310 } PACKED reliable_net_sendbuffer;
313 ubyte buffer[NETBUFFERSIZE];
314 } PACKED reliable_net_rcvbuffer;
317 reliable_net_sendbuffer *sbuffers[MAXNETBUFFERS]; // This is an array of pointers for quick sorting
318 unsigned short ssequence[MAXNETBUFFERS]; // This is the sequence number of the given packet
319 float timesent[MAXNETBUFFERS];
320 int send_len[MAXNETBUFFERS];
321 reliable_net_rcvbuffer *rbuffers[MAXNETBUFFERS];
322 int recv_len[MAXNETBUFFERS];
323 unsigned short rsequence[MAXNETBUFFERS]; // This is the sequence number of the given packet
324 float last_packet_received; // For a given connection, this is the last packet we received
325 float last_packet_sent;
326 struct sockaddr addr; // struct sockaddr of our peer
327 ushort status; // Status of this connection
328 unsigned short oursequence; // This is the next sequence number the application is expecting
329 unsigned short theirsequence; // This is the next sequence number the peer is expecting
330 net_addr_t net_addr; // A FS2 network address structure
331 ubyte connection_type; // IP, modem, etc.
332 float pings[MAX_PING_HISTORY];
334 unsigned int num_ping_samples;
338 reliable_socket Reliable_sockets[MAXRELIABLESOCKETS];
340 // socket TCP (unreliable)
343 // the sockets that the game will use when selecting network type
344 SOCKET Unreliable_socket = INVALID_SOCKET;
347 // SOCKET Reliable_UDP_socket = INVALID_SOCKET;
349 float First_sent_iamhere = 0;
350 float Last_sent_iamhere = 0;
352 #define CONNECTSEQ 0x142 // Magic number for starting a connection, just so it isn't 0
354 unsigned int Serverconn = 0xffffffff;
357 #pragma pack(pop,r_udp)
361 //*******************************
364 network_packet_buffer_list Psnet_top_buffers[PSNET_NUM_TYPES];
366 // -------------------------------------------------------------------------------------------------------
367 // PSNET 2 FORWARD DECLARATIONS
370 // if the string is a legally formatted ip string
371 int psnet_is_valid_numeric_ip(char *ip);
373 // functions to get the status of a RAS connection
374 unsigned int psnet_ras_status();
376 // set some options on a socket
377 void psnet_socket_options( SOCKET sock );
379 // initialize tcp socket
380 int psnet_init_tcp();
382 // get time in seconds
383 float psnet_get_time();
385 // returns the ip address of this machine. use for calling bind() with to associate with the proper
386 // IP address and network device.
389 // initialize reliable sockets
390 int psnet_init_rel_tcp(int port, int should_listen);
392 // shutdown reliable sockets
393 void psnet_rel_close();
395 // initialize the buffering system
396 void psnet_buffer_init(network_packet_buffer_list *l);
398 // buffer a packet (maintain order!)
399 void psnet_buffer_packet(network_packet_buffer_list *l, ubyte *data, int length, net_addr_t *from);
401 // get the index of the next packet in order!
402 int psnet_buffer_get_next(network_packet_buffer_list *l, ubyte *data, int *length, net_addr_t *from);
405 // -------------------------------------------------------------------------------------------------------
406 // PSNET 2 TOP LAYER FUNCTIONS - these functions simply buffer and store packets based upon type (see PSNET_TYPE_* defines)
409 // wrappers around select() and recvfrom() for lagging/losing data
410 int RECVFROM(SOCKET s, char *buf, int len, int flags, sockaddr *from, int *fromlen, int psnet_type)
412 network_packet_buffer_list *l;
418 SDL_assert((psnet_type >= 0) && (psnet_type < PSNET_NUM_TYPES));
419 if((psnet_type < 0) || (psnet_type >= PSNET_NUM_TYPES)){
422 l = &Psnet_top_buffers[psnet_type];
424 // if we have no buffer! The user should have made sure this wasn't the case by calling SELECT()
425 ret = psnet_buffer_get_next(l, (ubyte*)buf, &ret_len, &addr);
431 // otherwise, stuff the outgoing data
432 ((struct sockaddr_in*)from)->sin_port = htons(addr.port);
433 memcpy(&((struct sockaddr_in*)from)->sin_addr.s_addr, addr.addr, 4);
434 ((struct sockaddr_in*)from)->sin_family = AF_INET;
435 *fromlen = sizeof(struct sockaddr_in);
444 // wrappers around select() and recvfrom() for lagging/losing data
445 int SELECT(int nfds, fd_set FAR * readfds, fd_set FAR * writefds, fd_set FAR * exceptfds, struct timeval FAR * timeout, int psnet_type)
447 network_packet_buffer_list *l;
449 // if this is a check for writability, just return the select
450 if(writefds != NULL){
451 return select(nfds, readfds, writefds, exceptfds, timeout);
455 SDL_assert((psnet_type >= 0) && (psnet_type < PSNET_NUM_TYPES));
456 if((psnet_type < 0) || (psnet_type >= PSNET_NUM_TYPES)){
459 l = &Psnet_top_buffers[psnet_type];
461 // do we have any buffers in here?
462 if((l->psnet_lowest_id == -1) || (l->psnet_lowest_id > l->psnet_highest_id)){
470 // wrappers around sendto to sorting through different packet types
471 int SENDTO(SOCKET s, char * buf, int len, int flags, sockaddr *to, int tolen, int psnet_type)
473 char outbuf[MAX_TOP_LAYER_PACKET_SIZE + 150];
476 outbuf[0] = (char)psnet_type;
477 memcpy(&outbuf[1], buf, len);
479 // is the socket writeable?
482 return sendto(s, outbuf, len + 1, flags, (struct sockaddr*)to, tolen);
485 // call this once per frame to read everything off of our socket
486 void PSNET_TOP_LAYER_PROCESS()
489 struct sockaddr_in ip_addr; // UDP/TCP socket structure
498 net_addr_t from_addr;
499 network_naked_packet packet_read;
501 // clear the addresses to remove compiler warnings
502 memset(&ip_addr, 0, sizeof(struct sockaddr_in));
504 if ( Network_status != NETWORK_STATUS_RUNNING ) {
505 ml_printf("Network ==> socket not inited in PSNET_TOP_LAYER_PROCESS\n");
510 // check if there is any data on the socket to be read. The amount of data that can be
511 // atomically read is stored in len.
514 FD_SET( Unreliable_socket, &rfds );
519 if ( select( -1, &rfds, NULL, NULL, &timeout) == SOCKET_ERROR ) {
521 if ( select( Unreliable_socket+1, &rfds, NULL, NULL, &timeout) == SOCKET_ERROR ) {
523 ml_printf("Error %d doing a socket select on read\n", WSAGetLastError());
527 // if the read file descriptor is not set, then bail!
528 if ( !FD_ISSET(Unreliable_socket, &rfds) ){
532 // get data off the socket and process
533 from_len = sizeof(struct sockaddr_in);
534 read_len = recvfrom( Unreliable_socket, (char*)packet_read.data, MAX_TOP_LAYER_PACKET_SIZE, 0, (struct sockaddr*)&ip_addr, &from_len);
536 // set the from_addr for storage into the packet buffer structure
537 from_addr.type = Socket_type;
538 from_addr.port = ntohs( ip_addr.sin_port );
539 memcpy(from_addr.addr, &ip_addr.sin_addr.s_addr, 4);
541 if ( read_len == SOCKET_ERROR ) {
542 // int x = WSAGetLastError();
543 ml_printf("Socket error on socket_get_data()");
547 // determine the packet type
548 int packet_type = packet_read.data[0];
549 // mprintf(("TOP LAYER PACKET %d!\n", packet_type));
550 if((packet_type < 0) || (packet_type >= PSNET_NUM_TYPES)){
554 psnet_buffer_packet(&Psnet_top_buffers[packet_type], packet_read.data + 1, read_len - 1, &from_addr);
560 // -------------------------------------------------------------------------------------------------------
564 // initialize psnet to use the specified port
565 void psnet_init( int protocol, int port_num )
567 const char *internet_connection;
574 #if defined(DEMO) || defined(OEM_BUILD) // not for FS2_DEMO
578 // GAME PORT INITIALIZATION STUFF
579 if ( Network_status == NETWORK_STATUS_RUNNING ){
580 ml_string("Skipping psnet_init() because network already running");
584 // 'lan' should be a safe default in 2015
585 internet_connection = os_config_read_string("Network", "NetworkConnection", "LAN");
587 if ( !SDL_strcasecmp(internet_connection, NOX("dialup")) ) {
588 ml_string("psnet_init() detected dialup connection");
590 Psnet_connection = NETWORK_CONNECTION_DIALUP;
591 } else if ( !SDL_strcasecmp(internet_connection, NOX("lan")) ) {
592 ml_string("psnet_init() detected lan connection");
594 Psnet_connection = NETWORK_CONNECTION_LAN;
596 ml_string("psnet_init() detected no connection");
598 Psnet_connection = NETWORK_CONNECTION_NONE;
601 Network_status = NETWORK_STATUS_NO_WINSOCK;
603 if (WSAStartup(0x101, &wsa_data )){
608 // get the port for running this game on. Be careful that it cannot be out of bounds
609 Psnet_default_port = DEFAULT_GAME_PORT;
610 if ( (port_num > 1023) && (port_num < USHRT_MAX) ) {
611 Psnet_default_port = (ushort)port_num;
614 // initialize TCP now
616 if(!psnet_init_tcp()){
617 ml_printf("Error on TCP startup %d\n", Tcp_failure_code);
621 if(!psnet_init_rel_tcp(Psnet_default_port + 1, 0)){
622 ml_printf("Network", "Error on TCP startup %d\n", Tcp_failure_code);
628 // clear reliable sockets
629 reliable_socket *rsocket;
631 for(j=0; j<MAXRELIABLESOCKETS; j++){
632 rsocket=&Reliable_sockets[j];
633 memset(rsocket,0,sizeof(reliable_socket));
636 // determine if we've successfully initialized the protocol we want
638 Network_status = NETWORK_STATUS_NO_PROTOCOL;
640 ml_string("No protocol in psnet_init()!");
643 // specified network timeout
644 Nettimeout = NETTIMEOUT;
645 if(Cmdline_timeout > 0){
646 Nettimeout = Cmdline_timeout;
652 if(Network_status != NETWORK_STATUS_NO_PROTOCOL){
653 // set network to be running
654 Network_status = NETWORK_STATUS_RUNNING;
656 // determine if our socket can broadcast
657 Can_broadcast = Tcp_can_broadcast;
659 // initialize all packet type buffers
660 for(idx=0; idx<PSNET_NUM_TYPES; idx++){
661 psnet_buffer_init(&Psnet_top_buffers[idx]);
669 if ( Network_status != NETWORK_STATUS_RUNNING ){
674 WSACancelBlockingCall();
677 if ( TCP_socket != (int)INVALID_SOCKET ) {
678 shutdown( TCP_socket, 1 );
679 closesocket( TCP_socket );
684 //Warning( LOCATION, "Error closing wsock!\n" );
688 // close down all reliable sockets - this forces them to
689 // send a disconnect to any remote machines
692 Network_status = NETWORK_STATUS_NOT_INITIALIZED;
695 // set the protocol to use
696 int psnet_use_protocol( int protocol )
703 struct sockaddr_in ip_addr;
705 // zero out my address
706 Psnet_my_addr_valid = 0;
707 memset( &Psnet_my_addr, 0, sizeof(Psnet_my_addr) );
709 // wait until we choose a protocol to determine if we can broadcast
712 ml_string("In psnet_use_protocol()");
714 if (protocol != NET_TCP) {
720 if ( Network_status != NETWORK_STATUS_RUNNING ){
721 ml_string("Network_status != NETWORK_STATUS_RUNNING in NET_TCP in psnet_use_protocol()");
725 // assign the TCP_* sockets to the socket values used elsewhere
726 Unreliable_socket = TCP_socket;
728 Can_broadcast = Tcp_can_broadcast;
730 ml_printf("Psnet : TCP broadcast\n");
733 // get the socket name, and put it into My_addr
734 len = sizeof(struct sockaddr_in);
735 if ( getsockname(TCP_socket, (struct sockaddr *)&ip_addr, &len) == SOCKET_ERROR ) {
736 ml_printf("Unable to get sock name for TCP unreliable socket (%d)\n", WSAGetLastError() );
741 memcpy(Psnet_my_addr.addr, &ip_addr.sin_addr, 4);
742 Psnet_my_addr.port = Psnet_default_port;
744 ml_printf("Psnet using - NET_TCP\n");
747 Psnet_my_addr.type = protocol;
748 Socket_type = protocol;
753 // get the status of the network
754 int psnet_get_network_status()
756 // first case is when "none" is selected
757 if ( Psnet_connection == NETWORK_CONNECTION_NONE ) {
758 return NETWORK_ERROR_NO_TYPE;
761 // first, check the connection status of the network
762 if ( Network_status == NETWORK_STATUS_NO_WINSOCK )
763 return NETWORK_ERROR_NO_WINSOCK;
765 if ( Network_status == NETWORK_STATUS_NO_PROTOCOL ){
766 return NETWORK_ERROR_NO_PROTOCOL;
769 // network is running -- be sure that the RAS people know to connect if they currently cannot.
771 if ( Psnet_connection == NETWORK_CONNECTION_DIALUP ) {
772 // if on a dialup connection, be sure that RAS is active.
773 if ( !Ras_connected ) {
774 return NETWORK_ERROR_CONNECT_TO_ISP;
776 } else if ( Psnet_connection == NETWORK_CONNECTION_LAN ) {
777 // if on a LAN, and they have a dialup connection active, return error to indicate that they need
778 // to pick the right connection type
779 if ( Ras_connected ) {
780 return NETWORK_ERROR_LAN_AND_RAS;
783 return NETWORK_ERROR_NONE;
786 // convert a net_addr to a string
787 char* psnet_addr_to_string( char * text, const int max_textlen, net_addr_t * address )
790 if ( Network_status != NETWORK_STATUS_RUNNING ) {
791 SDL_strlcpy( text, XSTR("[no networking]",910), max_textlen );
797 SDL_assert(address->type == NET_TCP);
799 memcpy(&temp_addr.s_addr, address->addr, 4);
800 SDL_strlcpy( text, inet_ntoa(temp_addr), max_textlen );
805 // convert a string to a net addr
806 void psnet_string_to_addr( net_addr_t * address, char * text, const int max_textlen )
809 char str[255], *c, *port;
812 if ( Network_status != NETWORK_STATUS_RUNNING ) {
813 SDL_strlcpy( text, XSTR("[no networking]",910), max_textlen );
817 // copy the text string to local storage to look for ports
818 SDL_assert( strlen(text) < 255 );
819 SDL_strlcpy(str, text, SDL_arraysize(str));
820 c = strrchr(str, ':');
827 SDL_assert(address->type == NET_TCP);
830 addr.s_addr = inet_addr(str);
831 // if we get INADDR_NONE returns, then we need to try and resolve the host
833 if ( addr.s_addr == INADDR_NONE ) {
834 he = gethostbyname( str );
835 // returns a non-null pointer if successful, so get the address
837 addr.s_addr = ((in_addr *)(he->h_addr))->s_addr; // this is the address in network byte order
839 addr.s_addr = INADDR_NONE;
843 memcpy(address->addr, &addr.s_addr, 4);
846 address->port = (ushort)(atoi(port));
850 // compare 2 addresses
851 int psnet_same( net_addr_t * a1, net_addr_t * a2 )
853 return !memcmp(a1->addr, a2->addr, 4);
856 // send data unreliably
857 int psnet_send( net_addr_t * who_to, void * data, int len, int np_index )
859 // send data unreliably
861 struct sockaddr_in sockaddr; // UDP/TCP socket structure
863 ubyte iaddr[4], *send_data;
866 struct timeval timeout;
868 // always use the reliable socket
869 send_sock = Unreliable_socket;
871 if ( Network_status != NETWORK_STATUS_RUNNING ) {
872 ml_printf("Network ==> Socket not inited in psnet_send\n");
876 if ( psnet_same( who_to, &Psnet_my_addr) ){
880 if (who_to->type != NET_TCP) {
885 memcpy(iaddr, who_to->addr, 4);
887 if ( memcmp(iaddr, Null_address, 4) == 0) {
888 ml_printf("Network ==> send to address is 0 in psnet_send\n");
895 ml_printf("Network ==> destination port %d invalid in psnet_send\n", port);
899 // stuff the data with the type
900 send_data = (ubyte*)data;
904 FD_SET( send_sock, &wfds );
908 if ( SELECT( send_sock+1, NULL, &wfds, NULL, &timeout, PSNET_TYPE_UNRELIABLE) == SOCKET_ERROR ) {
909 ml_printf("Error on blocking select for write %d\n", WSAGetLastError() );
913 // if the write file descriptor is not set, then bail!
914 if ( !FD_ISSET(send_sock, &wfds ) ){
918 sockaddr.sin_family = AF_INET;
919 memcpy(&sockaddr.sin_addr.s_addr, iaddr, 4);
920 sockaddr.sin_port = htons(port);
922 multi_rate_add(np_index, "udp(h)", send_len + UDP_HEADER_SIZE);
923 multi_rate_add(np_index, "udp", send_len);
924 ret = SENDTO( send_sock, (char *)send_data, send_len, 0, (struct sockaddr*)&sockaddr, sizeof(sockaddr), PSNET_TYPE_UNRELIABLE );
926 if ( ret != SOCKET_ERROR ) {
929 //Warning( LOCATION, "Couldn't send data (0x%x)!\n", WSAGetLastError() );
933 // get data from the unreliable socket
934 int psnet_get( void * data, net_addr_t * from_addr )
938 // try and get a free buffer and return its size
939 if(psnet_buffer_get_next(&Psnet_top_buffers[PSNET_TYPE_UNRELIABLE], (ubyte*)data, &buffer_size, from_addr)){
947 // broadcast data on unreliable socket
948 int psnet_broadcast( net_addr_t * who_to, void * data, int len )
950 if ( Network_status != NETWORK_STATUS_RUNNING ) {
951 ml_printf("Network ==> Socket not inited in psnet_broadcast\n");
955 if ( !Can_broadcast ) {
956 ml_printf("Cannot broadcast -- returning without doing anything\n");
960 ubyte broadcast[4] = { 0xff, 0xff, 0xff, 0xff };
962 // broadcasting works on a local subnet which is all we really want to do for now anyway.
963 // we might keep this in as an option for freespace later.
964 memcpy(who_to->addr, broadcast, 4);
965 psnet_send(who_to, data, len);
973 ubyte data[MAX_TOP_LAYER_PACKET_SIZE + 250];
974 net_addr_t from_addr;
976 while ( psnet_get( data, &from_addr ) > 0 ) ;
979 // if the passed string is a valid IP string
980 int psnet_is_valid_ip_string( char *ip_string, int allow_port )
983 struct hostent *host_ent;
986 // our addresses may have ports, so make local copy and remove port number
987 SDL_assert( strlen(ip_string) < 255 );
988 SDL_strlcpy(str, ip_string, SDL_arraysize(str));
989 c = strrchr(str, ':');
994 addr.s_addr = inet_addr(ip_string);
995 if ( addr.s_addr != INADDR_NONE ){
996 // make sure the ip string is a valid format string
997 if(psnet_is_valid_numeric_ip(ip_string)){
1002 // try name resolution
1003 host_ent = gethostbyname( ip_string );
1008 // valid host entry so return 1;
1013 // -------------------------------------------------------------------------------------------------------
1014 // PSNET 2 RELIABLE SOCKET FUNCTIONS
1018 int psnet_rel_ping_compare( const void *arg1, const void *arg2 )
1020 float *ping1 = (float *)arg1;
1021 float *ping2 = (float *)arg2;
1023 if(*ping1==*ping2) return 0;
1024 else if(*ping1>*ping2) return 1;
1025 else if(*ping1<*ping2) return -1;
1030 void psnet_rel_send_ack(struct sockaddr *raddr, unsigned int sig, ubyte link_type, float time_sent)
1033 reliable_header ack_header;
1035 if (link_type != NET_TCP) {
1040 ack_header.type = RNT_ACK;
1041 ack_header.data_len = sizeof(unsigned int);
1042 ack_header.send_time = INTEL_FLOAT( time_sent );
1043 sig_tmp = INTEL_INT( sig );
1044 memcpy(&ack_header.data,&sig_tmp,sizeof(unsigned int));
1046 if ( !Tcp_active ) {
1047 ml_string("No TCP in rel_send_ack()");
1051 SENDTO(Unreliable_socket, (char *)&ack_header, RELIABLE_PACKET_HEADER_ONLY_SIZE+sizeof(unsigned int), 0, raddr, sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1054 // function to shutdown and close the given socket. It takes a couple of things into consideration
1055 // when closing, such as possibly reiniting reliable sockets if they are closed here.
1056 void psnet_rel_close_socket( PSNET_SOCKET_RELIABLE *sockp )
1058 reliable_header diss_conn_header;
1060 // if the socket is out of range
1061 if(*sockp>=MAXRELIABLESOCKETS)
1063 ml_printf("Invalid socket id passed to nw_NewCloseSocket() -- %d\n",*sockp);
1066 ml_printf("Closing socket %d\n",*sockp);
1068 // go through every buffer and "free it up(tm)"
1070 for(i=0;i<MAXNETBUFFERS;i++){
1071 if(Reliable_sockets[*sockp].rbuffers[i]){
1072 if(Reliable_sockets[*sockp].rbuffers[i] != NULL){
1073 free(Reliable_sockets[*sockp].rbuffers[i]);
1075 Reliable_sockets[*sockp].rbuffers[i] = NULL;
1076 Reliable_sockets[*sockp].rsequence[i] = 0;
1078 if(Reliable_sockets[*sockp].sbuffers[i]){
1079 if(Reliable_sockets[*sockp].sbuffers[i] != NULL){
1080 free(Reliable_sockets[*sockp].sbuffers[i]);
1082 Reliable_sockets[*sockp].sbuffers[i] = NULL;
1083 Reliable_sockets[*sockp].rsequence[i] = 0;
1087 // send a disconnect packet to the socket on the other end
1088 diss_conn_header.type = RNT_DISCONNECT;
1089 diss_conn_header.seq = CONNECTSEQ;
1090 diss_conn_header.data_len = 0;
1091 if(*sockp==Serverconn){
1092 Serverconn = 0xffffffff;
1095 if (Reliable_sockets[*sockp].connection_type == NET_TCP) {
1096 SDL_assert(Tcp_active);
1097 SENDTO(Unreliable_socket, (char *)&diss_conn_header,RELIABLE_PACKET_HEADER_ONLY_SIZE,0,&Reliable_sockets[*sockp].addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1099 ml_printf("Unknown protocol type in nw_CloseSocket()!\n");
1103 memset(&Reliable_sockets[*sockp],0,sizeof(reliable_socket));
1104 Reliable_sockets[*sockp].status = RNF_UNUSED;
1107 // function to check the status of the reliable socket and try to re-initialize it if necessary.
1108 // win95 seems to have trouble doing a reinit of the socket immediately after close, so this
1109 // function exists to check the status, and reinitialize if we need to
1110 int psnet_rel_check()
1115 // send data reliably
1116 int psnet_rel_send(PSNET_SOCKET_RELIABLE socketid, ubyte *data, int length, int np_index)
1120 reliable_socket *rsocket;
1122 if(socketid >= MAXRELIABLESOCKETS){
1123 ml_printf("Invalid socket id passed to psnet_rel_send() -- %d\n",socketid);
1127 SDL_assert( length < (int)(sizeof(reliable_header)) );
1130 rsocket=&Reliable_sockets[socketid];
1131 if(rsocket->status!=RNF_CONNECTED) {
1132 //We can't send because this isn't a connected reliable socket.
1133 ml_printf("Can't send packet because of status %d in nw_SendReliable(). socket = %d\n",rsocket->status,socketid);
1137 // Add the new packet to the sending list and send it.
1138 for(i=0;i<MAXNETBUFFERS;i++){
1139 if(NULL==rsocket->sbuffers[i]){
1140 reliable_header send_header;
1141 int send_this_packet=1;
1143 rsocket->send_len[i] = length;
1144 rsocket->sbuffers[i] = (reliable_net_sendbuffer *)malloc(sizeof(reliable_net_sendbuffer));
1146 memcpy(rsocket->sbuffers[i]->buffer,data,length);
1148 send_header.seq = INTEL_SHORT( rsocket->theirsequence );
1149 rsocket->ssequence[i] = rsocket->theirsequence;
1151 memcpy(send_header.data,data,length);
1152 send_header.data_len = INTEL_SHORT( (ushort)length );
1153 send_header.type = RNT_DATA;
1154 send_header.send_time = psnet_get_time();
1155 send_header.send_time = INTEL_FLOAT( send_header.send_time );
1156 // struct sockaddr_in * rsockaddr = (struct sockaddr_in *)&rsocket->addr;
1158 if (send_this_packet){
1159 if (rsocket->connection_type == NET_TCP) {
1160 SDL_assert(Tcp_active);
1161 multi_rate_add(np_index, "tcp(h)", RELIABLE_PACKET_HEADER_ONLY_SIZE+rsocket->send_len[i]);
1162 bytesout = SENDTO(Unreliable_socket, (char *)&send_header,RELIABLE_PACKET_HEADER_ONLY_SIZE+rsocket->send_len[i],0,&rsocket->addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1164 ml_printf("Unknown protocol type in nw_SendReliable()!\n");
1168 int error = WSAGetLastError();
1169 if((bytesout==SOCKET_ERROR)&&NETCALL_WOULDBLOCK(error)){
1170 //This will cause it to try to send again next frame. (or sooner)
1171 rsocket->timesent[i] = psnet_get_time()-(NETRETRYTIME*4);
1173 rsocket->timesent[i] = psnet_get_time();
1177 rsocket->theirsequence++;
1181 ml_printf("PSNET RELIABLE SEND BUFFER OVERRUN. socket = %d\n",socketid);
1187 // -1 socket not connected
1188 // 0 No packet ready to receive
1189 // >0 Buffer filled with the number of bytes recieved
1190 int psnet_rel_get(PSNET_SOCKET socketid, ubyte *buffer, int max_len)
1194 reliable_socket *rsocket = NULL;
1196 if(socketid >= MAXRELIABLESOCKETS){
1197 ml_printf("Invalid socket id passed to nw_NewReceiveReliable() -- %d\n",socketid);
1200 rsocket = &Reliable_sockets[socketid];
1201 if( (RNF_CONNECTED!=rsocket->status) && (RNF_LIMBO!=rsocket->status) ){
1202 ml_printf("Can't receive packet because it isn't connected in nw_ReceiveReliable(). socket = %d\n",socketid);
1205 //If the buffer position is the position we are waiting for, fill in
1206 //the buffer we received in the call to this function and return true
1208 for(i=0; i<MAXNETBUFFERS; i++){
1209 if((rsocket->rsequence[i] == rsocket->oursequence) && rsocket->rbuffers[i]){
1210 memcpy(buffer,rsocket->rbuffers[i]->buffer, rsocket->recv_len[i]);
1211 free(rsocket->rbuffers[i]);
1212 rsocket->rbuffers[i] = NULL;
1213 rsocket->rsequence[i] = 0;
1214 rsocket->oursequence++;
1215 return rsocket->recv_len[i];
1222 // process all active reliable sockets
1223 void psnet_rel_work()
1227 int max_len = NETBUFFERSIZE;
1229 struct timeval timeout;
1230 static reliable_header rcv_buff;
1231 static struct sockaddr rcv_addr;
1233 int addrlen = sizeof(struct sockaddr);
1237 PSNET_TOP_LAYER_PROCESS();
1239 // negotitate initial connection with the server
1240 reliable_socket *rsocket = NULL;
1241 if(Serverconn != 0xffffffff){
1242 //Check to see if we need to send a packet out.
1243 if((Reliable_sockets[Serverconn].status==RNF_LIMBO) && ((Serverconn != 0xffffffff) && fl_abs((psnet_get_time() - Last_sent_iamhere))>NETRETRYTIME) ){
1244 reliable_header conn_header;
1245 //Now send I_AM_HERE packet
1246 conn_header.type = RNT_I_AM_HERE;
1247 conn_header.seq = (ushort)(~CONNECTSEQ);
1248 conn_header.data_len = 0;
1249 Last_sent_iamhere = psnet_get_time();
1250 int ret = SOCKET_ERROR;
1252 if (Reliable_sockets[Serverconn].connection_type == NET_TCP) {
1253 SDL_assert(Tcp_active);
1254 ret = SENDTO(Unreliable_socket, (char *)&conn_header,RELIABLE_PACKET_HEADER_ONLY_SIZE,0,&Reliable_sockets[Serverconn].addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1257 int error = WSAGetLastError();
1258 if((ret == SOCKET_ERROR) && NETCALL_WOULDBLOCK(error)){
1259 Reliable_sockets[Serverconn].last_packet_sent = psnet_get_time()-NETRETRYTIME;
1261 Reliable_sockets[Serverconn].last_packet_sent = psnet_get_time();
1267 net_addr_t d3_rcv_addr;
1268 struct sockaddr_in *rcvaddr;
1269 int udp_has_data = 0;
1274 FD_SET(Unreliable_socket, &read_fds);
1275 udp_has_data = SELECT(Unreliable_socket+1,&read_fds,NULL,NULL,&timeout, PSNET_TYPE_RELIABLE);
1277 addrlen = sizeof(struct sockaddr);
1279 struct sockaddr_in *tcp_addr = (struct sockaddr_in *)&rcv_addr;
1280 memset(&d3_rcv_addr,0,sizeof(net_addr_t));
1281 memset(&rcv_addr,0,sizeof(struct sockaddr));
1282 bytesin = RECVFROM(Unreliable_socket, (char *)&rcv_buff,sizeof(reliable_header), 0, (struct sockaddr *)&rcv_addr,&addrlen, PSNET_TYPE_RELIABLE);
1283 rcv_buff.seq = INTEL_SHORT( rcv_buff.seq );
1284 rcv_buff.data_len = INTEL_SHORT( rcv_buff.data_len );
1285 rcv_buff.send_time = INTEL_FLOAT( rcv_buff.send_time );
1286 memcpy(d3_rcv_addr.addr, &tcp_addr->sin_addr.s_addr, 4);
1287 d3_rcv_addr.port = tcp_addr->sin_port;
1288 d3_rcv_addr.type = NET_TCP;
1289 link_type = NET_TCP;
1291 //Neither socket had data waiting
1296 ml_printf("recvfrom returned an error! -- %d\n",WSAGetLastError());
1297 //Int3();//See Kevin
1301 //Someone wants to connect, so find a slot
1302 if(rcv_buff.type == RNT_REQ_CONN){
1303 for(i=1; i<MAXRELIABLESOCKETS; i++){
1304 if( (Reliable_sockets[i].status == RNF_CONNECTED) || (Reliable_sockets[i].status == RNF_LIMBO) ){
1305 //if(memcmp(&rcv_addr,&reliable_sockets[i].addr,sizeof(struct sockaddr))==0)
1306 if(memcmp(&d3_rcv_addr, &Reliable_sockets[i].net_addr, sizeof(net_addr_t)) == 0){
1307 //We already have a reliable link to this user, so we will ignore it...
1308 ml_printf("Received duplicate connection request. %d\n",i);
1309 //reliable_sockets[i].last_packet_received = timer_GetTime();
1310 psnet_rel_send_ack(&Reliable_sockets[i].addr, rcv_buff.seq, link_type, rcv_buff.send_time);
1311 //We will change this as a hack to prevent later code from hooking us up
1312 rcv_buff.type = 0xff;
1317 for(i=1; i<MAXRELIABLESOCKETS; i++){
1318 if(Reliable_sockets[i].status == RNF_UNUSED){
1319 //Add the new connection here.
1320 Reliable_sockets[i].connection_type=link_type;
1321 memcpy(&Reliable_sockets[i].net_addr, &d3_rcv_addr, sizeof(net_addr_t));
1322 memcpy(&Reliable_sockets[i].addr ,&rcv_addr, sizeof(struct sockaddr));
1323 Reliable_sockets[i].ping_pos = 0;
1324 Reliable_sockets[i].num_ping_samples = 0;
1325 Reliable_sockets[i].status = RNF_LIMBO;
1326 Reliable_sockets[i].last_packet_received = psnet_get_time();
1327 rsocket = &Reliable_sockets[i];
1328 rcvaddr = (struct sockaddr_in *)&rcv_addr;
1329 ml_printf("Connect from %s:%d\n", inet_ntoa(rcvaddr->sin_addr), htons(rcvaddr->sin_port));
1333 if(i==MAXRELIABLESOCKETS){
1334 //No more connections!
1335 ml_printf("Out of incoming reliable connection sockets\n");
1336 //Int3();//See Kevin
1339 psnet_rel_send_ack(&rsocket->addr, rcv_buff.seq, link_type, rcv_buff.send_time);
1342 //Find out if this is a packet from someone we were expecting a packet.
1343 rcvaddr = (struct sockaddr_in *)&rcv_addr;
1344 for(i=1; i<MAXRELIABLESOCKETS; i++){
1345 if(memcmp(&d3_rcv_addr,&Reliable_sockets[i].net_addr,sizeof(net_addr_t)) == 0){
1346 rsocket=&Reliable_sockets[i];
1350 if(rsocket == NULL){
1351 ml_printf("Received reliable data from unconnected client.\n");
1352 ml_printf("Received from %s:%d\n",inet_ntoa(rcvaddr->sin_addr),rcvaddr->sin_port);
1355 rsocket->last_packet_received = psnet_get_time();
1357 if(rsocket->status != RNF_CONNECTED){
1359 if(rsocket->status == RNF_LIMBO){
1360 //this is our connection to the server
1361 if(Serverconn != 0xffffffff){
1362 if(rcv_buff.type == RNT_ACK){
1363 ushort *acknum = (ushort *)&rcv_buff.data;
1364 if(*acknum == (~CONNECTSEQ & 0xffff)){
1365 rsocket->status = RNF_CONNECTED;
1366 ml_printf("Got ACK for IAMHERE!\n");
1370 } else if(rcv_buff.type == RNT_I_AM_HERE){
1371 rsocket->status = RNF_CONNECTING;
1372 psnet_rel_send_ack(&rsocket->addr, rcv_buff.seq, link_type, rcv_buff.send_time);
1373 ml_printf("Got IAMHERE!\n");
1377 if((rcv_buff.type == RNT_DATA) && (Serverconn != 0xffffffff)){
1378 rsocket->status = RNF_CONNECTED;
1380 rsocket->last_packet_received = psnet_get_time();
1384 //Update the last recv variable so we don't need a heartbeat
1385 rsocket->last_packet_received = psnet_get_time();
1387 if(rcv_buff.type == RNT_HEARTBEAT){
1390 if(rcv_buff.type == RNT_ACK){
1392 rsocket->num_ping_samples++;
1394 rsocket->pings[rsocket->ping_pos] = rsocket->last_packet_received - rcv_buff.send_time;
1395 if(rsocket->num_ping_samples >= MAX_PING_HISTORY){
1396 float sort_ping[MAX_PING_HISTORY];
1397 for(int a=0;a<MAX_PING_HISTORY;a++){
1398 sort_ping[a] = rsocket->pings[a];
1401 qsort(sort_ping ,MAX_PING_HISTORY, sizeof(float), psnet_rel_ping_compare);
1402 rsocket->mean_ping = ((sort_ping[MAX_PING_HISTORY/2]+sort_ping[(MAX_PING_HISTORY/2)+1]))/2;
1404 rsocket->ping_pos++;
1405 if(rsocket->ping_pos >= MAX_PING_HISTORY){
1406 rsocket->ping_pos=0;
1409 // if this is an ack for a send buffer on the socket, kill the send buffer. its done
1410 for(i=0; i<MAXNETBUFFERS; i++){
1411 unsigned int *acksig = (unsigned int *)&rcv_buff.data;
1413 if(rsocket->sbuffers[i]){
1414 if(rsocket->ssequence[i] == INTEL_INT(*acksig) ){
1415 SDL_assert(rsocket->sbuffers[i] != NULL);
1416 free(rsocket->sbuffers[i]);
1417 rsocket->sbuffers[i] = NULL;
1418 rsocket->ssequence[i] = 0;
1423 //remove that packet from the send buffer
1424 rsocket->last_packet_received = psnet_get_time();
1428 if(rcv_buff.type == RNT_DATA_COMP){
1430 //Decompress it. Put it back in the buffer. Process it as RNT_DATA
1431 rcv_buff.type = RNT_DATA;
1433 if(rcv_buff.type == RNT_DATA){
1434 //If the data is out of order by >= MAXNETBUFFERS-1 ignore that packet for now
1436 seqdelta = rcv_buff.seq - rsocket->oursequence;
1437 if(seqdelta<0) seqdelta = seqdelta*-1;
1438 if(seqdelta>=MAXNETBUFFERS - 1){
1439 ml_printf("Received reliable packet out of order!\n");
1440 //It's out of order, so we won't ack it, which will mean we will get it again soon.
1443 //else move data into the proper buffer position
1446 if(rsocket->oursequence < (0xffff - (MAXNETBUFFERS-1))){
1447 if (rsocket->oursequence > rcv_buff.seq){
1451 //Sequence is high, so prepare for wrap around
1452 if( ((unsigned short)(rcv_buff.seq + rsocket->oursequence)) > (MAXNETBUFFERS-1)){
1457 for(i=0; i<MAXNETBUFFERS; i++){
1458 if( (NULL != rsocket->rbuffers[i]) && (rsocket->rsequence[i] == rcv_buff.seq)){
1459 //Received duplicate packet!
1464 for(i=0; i<MAXNETBUFFERS; i++){
1465 if(NULL == rsocket->rbuffers[i]){
1466 if(rcv_buff.data_len>max_len){
1467 rsocket->recv_len[i] = rcv_buff.data_len;
1469 rsocket->recv_len[i] = rcv_buff.data_len;
1471 rsocket->rbuffers[i] = (reliable_net_rcvbuffer *)malloc(sizeof(reliable_net_rcvbuffer));
1472 memcpy(rsocket->rbuffers[i]->buffer,rcv_buff.data,rsocket->recv_len[i]);
1473 rsocket->rsequence[i] = rcv_buff.seq;
1478 psnet_rel_send_ack(&rsocket->addr, rcv_buff.seq, link_type, rcv_buff.send_time);
1482 } while (udp_has_data > 0);
1484 // Go through each reliable socket that is connected and do any needed work.
1485 for(j=0; j<MAXRELIABLESOCKETS; j++){
1486 rsocket=&Reliable_sockets[j];
1488 if(Serverconn == 0xffffffff){
1489 if(rsocket->status==RNF_LIMBO){
1490 if(fl_abs((psnet_get_time() - rsocket->last_packet_received))>Nettimeout){
1491 ml_printf("Reliable (but in limbo) socket (%d) timed out in nw_WorkReliable().\n",j);
1492 memset(rsocket,0,sizeof(reliable_socket));
1493 rsocket->status = RNF_UNUSED;//Won't work if this is an outgoing connection.
1497 if((rsocket->status == RNF_LIMBO) && (fl_abs((psnet_get_time() - First_sent_iamhere)) > Nettimeout)){
1498 rsocket->status = RNF_BROKEN;
1499 ml_printf("Reliable socket (%d) timed out in nw_WorkReliable().\n",j);
1503 if(rsocket->status == RNF_CONNECTED){
1504 float retry_packet_time;
1505 if((rsocket->mean_ping==0) || (rsocket->mean_ping > (NETRETRYTIME*4))){
1506 retry_packet_time = NETRETRYTIME;
1508 if(rsocket->mean_ping<MIN_NET_RETRYTIME) {
1509 retry_packet_time = (float)MIN_NET_RETRYTIME;
1511 retry_packet_time = ((float)(float)rsocket->mean_ping * (float)1.25);
1514 //Iterate through send buffers.
1515 for(i=0;i<MAXNETBUFFERS;i++){
1517 if((rsocket->sbuffers[i]) && (fl_abs((psnet_get_time() - rsocket->timesent[i])) >= retry_packet_time)) {
1518 reliable_header send_header;
1519 send_header.send_time = psnet_get_time();
1520 send_header.send_time = INTEL_FLOAT( send_header.send_time );
1521 send_header.seq = INTEL_SHORT( rsocket->ssequence[i] );
1522 memcpy(send_header.data,rsocket->sbuffers[i]->buffer,rsocket->send_len[i]);
1523 send_header.data_len = INTEL_SHORT( (ushort)rsocket->send_len[i] );
1524 send_header.type = RNT_DATA;
1525 if(rsocket->connection_type == NET_TCP){
1526 rcode = SENDTO(Unreliable_socket, (char *)&send_header,RELIABLE_PACKET_HEADER_ONLY_SIZE+rsocket->send_len[i],0,&rsocket->addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1528 int error = WSAGetLastError();
1529 if((rcode == SOCKET_ERROR) && NETCALL_WOULDBLOCK(error)){
1530 //The packet didn't get sent, flag it to try again next frame
1531 rsocket->timesent[i] = psnet_get_time()-(NETRETRYTIME*4);
1533 rsocket->last_packet_sent = psnet_get_time();
1534 rsocket->timesent[i] = psnet_get_time();
1540 if((rsocket->status == RNF_CONNECTED) && (fl_abs((psnet_get_time() - rsocket->last_packet_sent)) > NETHEARTBEATTIME)) {
1541 reliable_header send_header;
1542 send_header.send_time = psnet_get_time();
1543 send_header.send_time = INTEL_FLOAT( send_header.send_time );
1544 send_header.seq = 0;
1545 send_header.data_len = 0;
1546 send_header.type = RNT_HEARTBEAT;
1549 if(rsocket->connection_type == NET_TCP){
1550 rcode = SENDTO(Unreliable_socket, (char *)&send_header,RELIABLE_PACKET_HEADER_ONLY_SIZE,0,&rsocket->addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1552 int error = WSAGetLastError();
1553 if((rcode != SOCKET_ERROR) && NETCALL_WOULDBLOCK(error)){
1554 //It must have been sent
1555 rsocket->last_packet_sent = psnet_get_time();
1559 if((rsocket->status == RNF_CONNECTED) && (fl_abs((psnet_get_time() - rsocket->last_packet_received))>Nettimeout)){
1560 //This socket is hosed.....inform someone?
1561 ml_printf("Reliable Socket (%d) timed out in nw_WorkReliable().\n",j);
1562 rsocket->status = RNF_BROKEN;
1568 // get the status of a reliable socket, see RNF_* defines above
1569 int psnet_rel_get_status(PSNET_SOCKET_RELIABLE socketid)
1571 if(socketid >= MAXRELIABLESOCKETS){
1575 return Reliable_sockets[socketid].status;
1578 // function which checks the Listen_socket for possibly incoming requests to be connected.
1579 // returns 0 on error or nothing waiting. 1 if we should try to accept
1580 int psnet_rel_check_for_listen(net_addr_t *from_addr)
1582 struct sockaddr_in *ip_addr; // UDP/TCP socket structure
1586 for(i=1; i<MAXRELIABLESOCKETS; i++){
1587 if(Reliable_sockets[i].status == RNF_CONNECTING){
1588 Reliable_sockets[i].status = RNF_CONNECTED;
1589 //memcpy(from_addr,&reliable_sockets[i].addr,sizeof(struct sockaddr));
1590 ml_printf("New reliable connection in nw_CheckListenSocket().\n");
1592 if (Reliable_sockets[i].connection_type != NET_TCP) {
1596 ip_addr = (struct sockaddr_in *)&Reliable_sockets[i].addr;
1597 memset(from_addr, 0x00, sizeof(net_addr_t));
1598 from_addr->port = ntohs( ip_addr->sin_port );
1599 from_addr->type = NET_TCP;
1600 memcpy(from_addr->addr, &ip_addr->sin_addr.s_addr, 4);
1603 char dbg_output[50];
1604 nw_GetNumbersFromHostAddress(from_addr,dbg_output);
1605 mprintf((0,"Got address from: %s\n",dbg_output));
1610 return INVALID_SOCKET;
1613 // attacmpt to connect() to the server's tcp socket. socket parameter is simply assigned to the
1614 // Reliable_socket socket created in psnet_init
1615 void psnet_rel_connect_to_server(PSNET_SOCKET *socket, net_addr_t *server_addr)
1617 //Send out a RNT_REQ_CONN packet, and wait for it to be acked.
1618 struct sockaddr_in sockaddr; // UDP/TCP socket structure
1619 struct sockaddr *addr = NULL; // pointer to struct sockaddr to make coding easier
1620 struct sockaddr rcv_addr;
1624 // float time_sent_req = 0;
1625 float first_sent_req = 0;
1626 static reliable_header conn_header;
1627 static reliable_header ack_header;
1629 struct timeval timeout;
1632 *socket = INVALID_SOCKET;
1634 memcpy(iaddr, &server_addr->addr, 4);
1635 port = (ushort)(server_addr->port); // Talk to the server listen port
1637 conn_header.type = RNT_REQ_CONN;
1638 conn_header.seq = CONNECTSEQ;
1639 conn_header.data_len = 0;
1644 if (server_addr->type != NET_TCP) {
1648 SDL_assert(Tcp_active);
1650 //Flush out any left overs
1652 FD_SET(Unreliable_socket, &read_fds);
1653 while(SELECT(Unreliable_socket+1, &read_fds, NULL, NULL, &timeout, PSNET_TYPE_RELIABLE)){
1654 addrlen = sizeof(struct sockaddr);
1655 bytesin = RECVFROM(Unreliable_socket, (char *)&ack_header,sizeof(reliable_header),0,(struct sockaddr *)&rcv_addr,&addrlen, PSNET_TYPE_RELIABLE);
1657 //Int3();//See Kevin
1658 ml_printf("UDP recvfrom returned an error! -- %d\n",WSAGetLastError());
1663 FD_SET(Unreliable_socket, &read_fds);
1666 memset(&ack_header,0,sizeof(reliable_header));
1668 SOCKET typeless_sock = 0;
1669 net_addr_t d3_rcv_addr;
1670 memset(&d3_rcv_addr,0,sizeof(net_addr_t));
1673 sockaddr.sin_family = AF_INET;
1674 memcpy(&sockaddr.sin_addr.s_addr, iaddr, 4);
1675 sockaddr.sin_port = htons(port);
1676 addr = (struct sockaddr *)&sockaddr;
1677 if( SOCKET_ERROR == SENDTO(Unreliable_socket, (char *)&conn_header,RELIABLE_PACKET_HEADER_ONLY_SIZE,0,addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE) ){
1678 ml_printf("Unable to send UDP packet in nw_ConnectToServer()! -- %d\n",WSAGetLastError());
1681 memcpy(d3_rcv_addr.addr, &sockaddr.sin_addr.s_addr, 4);
1682 d3_rcv_addr.port = sockaddr.sin_port;
1683 d3_rcv_addr.type = NET_TCP;
1684 typeless_sock = Unreliable_socket;
1687 first_sent_req = psnet_get_time();
1688 // time_sent_req = psnet_get_time();
1690 //Wait until we get a response from the server or we timeout
1693 PSNET_TOP_LAYER_PROCESS();
1696 FD_SET(typeless_sock, &read_fds);
1697 if(SELECT(typeless_sock+1, &read_fds, NULL,NULL,&timeout, PSNET_TYPE_RELIABLE)){
1698 ml_string("selected() in psnet_rel_connect_to_server()");
1700 addrlen = sizeof(struct sockaddr);
1701 bytesin = RECVFROM(typeless_sock,(char *)&ack_header,sizeof(reliable_header),0,(struct sockaddr *)&rcv_addr,&addrlen, PSNET_TYPE_RELIABLE);
1703 ml_printf("recvfrom returned an error! -- %d\n",WSAGetLastError());
1708 ml_string("received data after select in psnet_rel_connect_to_server()");
1710 ml_string("about to check ack_header.type");
1711 if(ack_header.type == RNT_ACK){
1712 short *acknum = (short *)&ack_header.data;
1713 if(*acknum == CONNECTSEQ){
1714 for(i=1; i<MAXRELIABLESOCKETS; i++){
1715 if(Reliable_sockets[i].status==RNF_UNUSED){
1716 //Add the new connection here.
1717 memset(&Reliable_sockets[i],0,sizeof(reliable_socket));
1718 Reliable_sockets[i].connection_type = (ubyte)server_addr->type;
1719 memcpy(&Reliable_sockets[i].net_addr,&d3_rcv_addr,sizeof(net_addr_t));
1720 Reliable_sockets[i].last_packet_received = psnet_get_time();
1721 memcpy(&Reliable_sockets[i].addr,&rcv_addr,sizeof(struct sockaddr));
1722 Reliable_sockets[i].status = RNF_LIMBO;
1724 ml_printf("Succesfully connected to server in nw_ConnectToServer().\n");
1725 //Now send I_AM_HERE packet
1726 conn_header.type = RNT_I_AM_HERE;
1727 conn_header.seq = (ushort)(~CONNECTSEQ);
1728 conn_header.data_len = 0;
1730 First_sent_iamhere = psnet_get_time();
1731 Last_sent_iamhere = psnet_get_time();
1732 int rcode = SENDTO(typeless_sock,(char *)&conn_header,RELIABLE_PACKET_HEADER_ONLY_SIZE,0,addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1733 if(rcode == SOCKET_ERROR){
1734 *socket = INVALID_SOCKET;
1735 Reliable_sockets[i].status = RNF_UNUSED;
1736 memset(&Reliable_sockets[i],0,sizeof(reliable_socket));
1737 ml_printf("Unable to send packet in nw_ConnectToServer()\n");
1740 Reliable_sockets[i].last_packet_sent = psnet_get_time();
1742 f = psnet_get_time();
1743 while((fl_abs((psnet_get_time() - f))<2) && (Reliable_sockets[i].status != RNF_CONNECTING)){
1750 ml_printf("Out of reliable socket space in nw_ConnectToServer().\n");
1752 } else ml_printf("Received out of sequence ACK in nw_ConnectToServer().\n");
1753 } else ml_printf("Received something that isn't an ACK in nw_ConnectToServer().\n");
1754 } else ml_printf("Received 0 bytes from recvfrom() in nw_ConnectToServer().\n");
1757 if((psnet_get_time()-time_sent_req)>2)
1759 ml_printf("Resending connect request.\n");
1760 int ret = SENDTO(typeless_sock,(char *)&conn_header,RELIABLE_PACKET_HEADER_ONLY_SIZE,0,addr,sizeof(struct sockaddr), PSNET_TYPE_RELIABLE);
1761 if(ret != SOCKET_ERROR){
1762 time_sent_req = psnet_get_time();
1764 ml_printf("Error sending connection request! -- %d\n",WSAGetLastError() );
1769 } while(fl_abs((psnet_get_time() - first_sent_req)) < RELIABLE_CONNECT_TIME);
1772 // returns the ip address of this computer
1774 int psnet_rel_get_ip()
1778 struct sockaddr_in local_address;
1781 // Get the local host name
1782 memset(&local_address, 0, sizeof(local_address));
1783 ret = gethostname(local, 255 );
1784 if (ret != SOCKET_ERROR ){
1785 // Resolve host name for local address
1786 hostent = gethostbyname((char *)local);
1788 local_address.sin_addr.s_addr = *((u_long FAR *)(hostent->h_addr));
1791 ml_string("SOCKET_ERROR in psnet_rel_get_ip()!");
1793 ml_printf(%s:%d\n", inet_ntoa(rcvaddr->sin_addr), htons(rcvaddr->sin_port)
1794 return local_address.sin_addr.s_addr;
1798 // returns the ip address of this computer
1801 struct sockaddr_in local_address;
1803 if(Psnet_connection == NETWORK_CONNECTION_DIALUP){
1804 local_address.sin_addr.s_addr = psnet_ras_status();
1805 if(local_address.sin_addr.s_addr == INADDR_NONE){
1806 local_address.sin_addr.s_addr = INADDR_ANY;
1809 // Init local address to zero
1810 local_address.sin_addr.s_addr = INADDR_ANY;
1813 // NOTE: for memeory checkers, do NOT try to free this
1814 ml_printf("psnet_get_ip() reports IP : %s\n", inet_ntoa(local_address.sin_addr));
1816 return local_address.sin_addr.s_addr;
1819 // initialize reliable sockets
1820 int psnet_init_rel_tcp(int port, int should_listen)
1823 struct sockaddr_in sockaddr;
1825 sockaddr.sin_port = htons((ushort)port);
1826 sockaddr.sin_family = AF_INET;
1828 ml_printf("Setting up reliable sockets.\n");
1830 my_ip = psnet_get_ip();
1832 memcpy(&sockaddr.sin_addr.s_addr, &my_ip, sizeof(uint));
1834 Reliable_UDP_socket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP );
1835 if(INVALID_SOCKET == Reliable_UDP_socket){
1836 ml_printf("Unable to create reliable UDP socket -- %d\n", WSAGetLastError() );
1839 } else if(bind(Reliable_UDP_socket,(struct sockaddr *)&sockaddr,sizeof(struct sockaddr))!=0){
1840 ml_printf("Unable to bind reliable socket -- %d\n", WSAGetLastError() );
1845 // make any reliable sockets which we create that aren't listening non-blocking sockets
1850 error = ioctlsocket( Reliable_UDP_socket, FIONBIO, &arg );
1851 if ( error == SOCKET_ERROR ) {
1852 ml_printf("Unable to make reliable UDP socket non-blocking -- %d\n", WSAGetLastError() );
1862 void psnet_rel_close()
1865 PSNET_SOCKET_RELIABLE sock;
1868 for(idx=0; idx<MAXRELIABLESOCKETS; idx++){
1869 if(Reliable_sockets[idx].status != RNF_UNUSED){
1871 psnet_rel_close_socket(&sock);
1876 // ------------------------------------------------------------------------------------------------------
1877 // PACKET BUFFERING FUNCTIONS
1880 // initialize the buffering system
1881 void psnet_buffer_init(network_packet_buffer_list *l)
1885 // blast the buffer clean
1886 memset(l->psnet_buffers, 0, sizeof(network_packet_buffer) * MAX_PACKET_BUFFERS);
1888 // set all buffer sequence #'s to -1
1889 for(idx=0;idx<MAX_PACKET_BUFFERS;idx++){
1890 l->psnet_buffers[idx].sequence_number = -1;
1893 // initialize the sequence #
1894 l->psnet_seq_number = 0;
1895 l->psnet_lowest_id = -1;
1896 l->psnet_highest_id = -1;
1899 // buffer a packet (maintain order!)
1900 void psnet_buffer_packet(network_packet_buffer_list *l, ubyte *data, int length, net_addr_t *from)
1905 // find the first empty packet
1906 for(idx=0;idx<MAX_PACKET_BUFFERS;idx++){
1907 if(l->psnet_buffers[idx].sequence_number == -1){
1913 // if we didn't find the buffer, report an overrun
1915 ml_printf("WARNING - Buffer overrun in psnet\n");
1918 memcpy(l->psnet_buffers[idx].data, data, length);
1919 l->psnet_buffers[idx].len = length;
1920 memcpy(&l->psnet_buffers[idx].from_addr, from, sizeof(net_addr_t));
1921 l->psnet_buffers[idx].sequence_number = l->psnet_seq_number;
1923 // keep track of the highest id#
1924 l->psnet_highest_id = l->psnet_seq_number++;
1926 // set the lowest id# for the first time
1927 if(l->psnet_lowest_id == -1){
1928 l->psnet_lowest_id = l->psnet_highest_id;
1933 // get the index of the next packet in order!
1934 int psnet_buffer_get_next(network_packet_buffer_list *l, ubyte *data, int *length, net_addr_t *from)
1939 // if there are no buffers, do nothing
1940 if((l->psnet_lowest_id == -1) || (l->psnet_lowest_id > l->psnet_highest_id)){
1944 // search until we find the lowest packet index id#
1945 for(idx=0;idx<MAX_PACKET_BUFFERS;idx++){
1946 // if we found the buffer
1947 if(l->psnet_buffers[idx].sequence_number == l->psnet_lowest_id){
1953 // at this point, we should _always_ have found the buffer
1954 SDL_assert(found_buf);
1956 // copy out the buffer data
1957 memcpy(data, l->psnet_buffers[idx].data, l->psnet_buffers[idx].len);
1958 *length = l->psnet_buffers[idx].len;
1959 memcpy(from, &l->psnet_buffers[idx].from_addr, sizeof(net_addr_t));
1961 // now we need to cleanup the packet list
1963 // mark the buffer as free
1964 l->psnet_buffers[idx].sequence_number = -1;
1965 l->psnet_lowest_id++;
1970 // -------------------------------------------------------------------------------------------------------
1971 // PSNET 2 FORWARD DEFINITIONS
1974 // if the string is a legally formatted ip string
1975 int psnet_is_valid_numeric_ip(char *ip)
1979 int val1,val2,val3,val4;
1981 // get the first ip value
1982 SDL_strlcpy(copy, ip, SDL_arraysize(copy));
1983 token = strtok(copy,".");
1987 // get the value of the token
1989 if((val1 < 0) || (val1 > 255)){
1995 token = strtok(NULL,".");
1999 // get the value of the token
2001 if((val2 < 0) || (val2 > 255)){
2007 token = strtok(NULL,".");
2011 // get the value of the token
2013 if((val3 < 0) || (val3 > 255)){
2019 token = strtok(NULL,"");
2023 // get the value of the token
2025 if((val4 < 0) || (val4 > 255)){
2030 // make sure he hasn't entered all 0's
2031 if((val1 == 0) && (val2 == 0) && (val3 == 0) && (val4 == 0)){
2039 // function called from high level FreeSpace code to determine the status of the networking
2040 // code returns one of a handful of macros
2042 DWORD (__stdcall *pRasEnumConnections)(LPRASCONN lprasconn, LPDWORD lpcb, LPDWORD lpcConnections) = NULL;
2043 DWORD (__stdcall *pRasGetConnectStatus)(HRASCONN hrasconn, LPRASCONNSTATUS lprasconnstatus ) = NULL;
2044 DWORD (__stdcall *pRasGetProjectionInfo)(HRASCONN hrasconn, RASPROJECTION rasprojection, LPVOID lpprojection, LPDWORD lpcb ) = NULL;
2046 // functions to get the status of a RAS connection
2047 unsigned int psnet_ras_status()
2050 unsigned long size, num_connections, i;
2051 RASCONN rasbuffer[25];
2052 HINSTANCE ras_handle;
2053 unsigned long rasip=0;
2054 RASPPPIP projection;
2055 // int Ras_connected;
2059 // first, call a LoadLibrary to load the RAS api
2060 ras_handle = LoadLibrary( (LPCWSTR)"rasapi32.dll" );
2061 if ( ras_handle == NULL ) {
2065 pRasEnumConnections = (DWORD (__stdcall *)(LPRASCONN, LPDWORD, LPDWORD))GetProcAddress(ras_handle, "RasEnumConnectionsA");
2066 if (!pRasEnumConnections) {
2067 FreeLibrary( ras_handle );
2070 pRasGetConnectStatus = (DWORD (__stdcall *)(HRASCONN, LPRASCONNSTATUS))GetProcAddress(ras_handle, "RasGetConnectStatusA");
2071 if (!pRasGetConnectStatus) {
2072 FreeLibrary( ras_handle );
2075 pRasGetProjectionInfo = (DWORD (__stdcall *)(HRASCONN, RASPROJECTION, LPVOID, LPDWORD))GetProcAddress(ras_handle, "RasGetProjectionInfoA");
2076 if (!pRasGetProjectionInfo) {
2077 FreeLibrary( ras_handle );
2081 size = sizeof(rasbuffer);
2082 rasbuffer[0].dwSize = sizeof(RASCONN);
2084 rval = pRasEnumConnections( rasbuffer, &size, &num_connections );
2086 FreeLibrary( ras_handle );
2090 // JAS: My computer gets to this point, but I have no RAS connections,
2092 if ( num_connections < 1 ) {
2093 ml_string("Found no RAS connections");
2094 FreeLibrary( ras_handle );
2098 ml_printf("Found %d connections", num_connections);
2100 for (i = 0; i < num_connections; i++ ) {
2101 RASCONNSTATUS status;
2104 ml_printf("Connection %d:", i);
2105 ml_printf("Entry Name: %s", rasbuffer[i].szEntryName);
2106 ml_printf("Device Type: %s", rasbuffer[i].szDeviceType);
2107 ml_printf("Device Name: %s", rasbuffer[i].szDeviceName);
2109 // get the connection status
2110 status.dwSize = sizeof(RASCONNSTATUS);
2111 rval = pRasGetConnectStatus(rasbuffer[i].hrasconn, &status);
2113 FreeLibrary( ras_handle );
2117 // get the projection informatiom
2118 size = sizeof(projection);
2119 projection.dwSize = size;
2120 rval = pRasGetProjectionInfo(rasbuffer[i].hrasconn, RASP_PppIp, &projection, &size );
2122 FreeLibrary( ras_handle );
2126 ml_printf("IP Address: %s", projection.szIpAddress);
2131 FreeLibrary( ras_handle );
2132 rasip = inet_addr((const char *)projection.szIpAddress);
2133 if(rasip==INADDR_NONE){
2137 //The ip of the RAS connection
2141 unsigned int psnet_ras_status()
2149 // functions to get the status of a RAS connection
2151 void psnet_ras_status()
2154 unsigned long size, num_connections, i;
2155 RASCONN rasbuffer[25];
2156 HINSTANCE ras_handle;
2160 // first, call a LoadLibrary to load the RAS api
2161 ras_handle = LoadLibrary( NOX("rasapi32.dll") );
2162 if ( ras_handle == NULL ) {
2166 pRasEnumConnections = (DWORD (__stdcall *)(LPRASCONN, LPDWORD, LPDWORD))GetProcAddress(ras_handle, NOX("RasEnumConnectionsA"));
2167 if (!pRasEnumConnections) {
2168 FreeLibrary( ras_handle );
2171 pRasGetConnectStatus = (DWORD (__stdcall *)(HRASCONN, LPRASCONNSTATUS))GetProcAddress(ras_handle, NOX("RasGetConnectStatusA"));
2172 if (!pRasGetConnectStatus) {
2173 FreeLibrary( ras_handle );
2176 pRasGetProjectionInfo = (DWORD (__stdcall *)(HRASCONN, RASPROJECTION, LPVOID, LPDWORD))GetProcAddress(ras_handle, NOX("RasGetProjectionInfoA"));
2177 if (!pRasGetProjectionInfo) {
2178 FreeLibrary( ras_handle );
2182 size = sizeof(rasbuffer);
2183 rasbuffer[0].dwSize = sizeof(RASCONN);
2185 rval = pRasEnumConnections( rasbuffer, &size, &num_connections );
2187 FreeLibrary( ras_handle );
2191 // JAS: My computer gets to this point, but I have no RAS connections,
2193 if ( num_connections < 1 ) {
2194 ml_printf("Found no connections\n" );
2195 FreeLibrary( ras_handle );
2199 ml_printf("Found %d connections\n", num_connections);
2201 for (i = 0; i < num_connections; i++ ) {
2202 RASCONNSTATUS status;
2203 RASPPPIP projection;
2206 ml_printf("Connection %d:\n", i);
2207 ml_printf("Entry Name: %s\n", rasbuffer[i].szEntryName);
2208 ml_printf("Device Type: %s\n", rasbuffer[i].szDeviceType);
2209 ml_printf("Device Name: %s\n", rasbuffer[i].szDeviceName);
2211 // get the connection status
2212 status.dwSize = sizeof(RASCONNSTATUS);
2213 rval = pRasGetConnectStatus(rasbuffer[i].hrasconn, &status);
2215 FreeLibrary( ras_handle );
2219 ml_printf("\tStatus: %s\n", (status.rasconnstate==RASCS_Connected)?"Connected":"Not Connected");
2221 // get the projection informatiom
2222 size = sizeof(projection);
2223 projection.dwSize = size;
2224 rval = pRasGetProjectionInfo(rasbuffer[i].hrasconn, RASP_PppIp, &projection, &size );
2226 FreeLibrary( ras_handle );
2230 ml_printf("IP Address: %s", projection.szIpAddress));
2235 FreeLibrary( ras_handle );
2239 // set some options on a socket
2240 void psnet_socket_options( SOCKET sock )
2242 int broadcast;//, ret;
2244 int cursize, cursizesize, bufsize;
2246 socklen_t cursize, cursizesize, bufsize;
2249 // Set the mode of the socket to allow broadcasting
2251 if(setsockopt(sock, SOL_SOCKET, SO_BROADCAST, (char *)&broadcast, sizeof(broadcast) )){
2258 // setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *)&broadcast, sizeof(broadcast) );
2260 // try and increase the size of my receive buffer
2261 bufsize = MAX_RECEIVE_BUFSIZE;
2263 // set the current size of the receive buffer
2264 cursizesize = sizeof(int);
2265 getsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&cursize, &cursizesize);
2266 // for ( trysize = bufsize; trysize >= cursize; trysize >>= 1 ) {
2267 /*ret =*/ setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&bufsize, sizeof(bufsize));
2268 /*if ( ret == SOCKET_ERROR ) {
2271 wserr = WSAGetLastError();
2272 // if ( (wserr == WSAENOPROTOOPT) || (wserr == WSAEINVAL) )
2276 getsockopt(sock, SOL_SOCKET, SO_RCVBUF, (char *)&cursize, &cursizesize);
2277 ml_printf("Receive buffer set to %d\n", cursize);
2279 // set the current size of the send buffer
2280 cursizesize = sizeof(int);
2281 getsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)&cursize, &cursizesize);
2282 // for ( trysize = bufsize; trysize >= cursize; trysize >>= 1 ) {
2283 /*ret =*/ setsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)&bufsize, sizeof(bufsize));
2284 /*if ( ret == SOCKET_ERROR ) {
2287 wserr = WSAGetLastError();
2288 // if ( (wserr == WSAENOPROTOOPT) || (wserr == WSAEINVAL) ){
2292 getsockopt(sock, SOL_SOCKET, SO_SNDBUF, (char *)&cursize, &cursizesize);
2293 ml_printf("Send buffer set to %d\n", cursize);
2296 // initialize tcp socket
2297 int psnet_init_tcp()
2299 struct sockaddr_in sockaddr;
2301 TCP_socket = INVALID_SOCKET;
2303 TCP_socket = socket( AF_INET, SOCK_DGRAM, 0 );
2304 if ( TCP_socket == (int)INVALID_SOCKET ) {
2305 Tcp_failure_code = WSAGetLastError();
2306 ml_printf("Error on TCP startup %d\n", Tcp_failure_code);
2311 memset(&sockaddr,0,sizeof(struct sockaddr_in));
2312 sockaddr.sin_family = AF_INET;
2313 sockaddr.sin_addr.s_addr = psnet_get_ip();
2314 sockaddr.sin_port = htons( Psnet_default_port );
2315 if ( bind(TCP_socket, (struct sockaddr*)&sockaddr, sizeof (sockaddr)) == SOCKET_ERROR) {
2316 Tcp_failure_code = WSAGetLastError();
2317 ml_printf("Couldn't bind TCP socket (%d)! Invalidating TCP\n", Tcp_failure_code );
2321 // set socket options
2322 psnet_socket_options( TCP_socket );
2323 Tcp_can_broadcast = Can_broadcast;
2329 // get time in seconds
2330 float psnet_get_time()
2332 return (float)timer_get_milliseconds() / 1000.0f;
2335 // mark a socket as having received data
2336 void psnet_mark_received(PSNET_SOCKET_RELIABLE socket)
2339 if((socket == 0xffffffff) || (socket >= MAXRELIABLESOCKETS)){
2344 Reliable_sockets[socket].last_packet_received = psnet_get_time();