--- a/network_udp.c Tue Jan 02 18:40:37 2007 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,892 +0,0 @@
-/* $Id$ */
-
-#ifdef ENABLE_NETWORK
-
-#include "stdafx.h"
-#include "debug.h"
-#include "string.h"
-#include "network_data.h"
-#include "date.h"
-#include "map.h"
-#include "network_gamelist.h"
-#include "network_udp.h"
-#include "variables.h"
-#include "newgrf_config.h"
-
-//
-// This file handles all the LAN-stuff
-// Stuff like:
-// - UDP search over the network
-//
-
-typedef enum {
- PACKET_UDP_CLIENT_FIND_SERVER,
- PACKET_UDP_SERVER_RESPONSE,
- PACKET_UDP_CLIENT_DETAIL_INFO,
- PACKET_UDP_SERVER_DETAIL_INFO, // Is not used in OpenTTD itself, only for external querying
- PACKET_UDP_SERVER_REGISTER, // Packet to register itself to the master server
- PACKET_UDP_MASTER_ACK_REGISTER, // Packet indicating registration has succedeed
- PACKET_UDP_CLIENT_GET_LIST, // Request for serverlist from master server
- PACKET_UDP_MASTER_RESPONSE_LIST, // Response from master server with server ip's + port's
- PACKET_UDP_SERVER_UNREGISTER, // Request to be removed from the server-list
- PACKET_UDP_CLIENT_GET_NEWGRFS, // Requests the name for a list of GRFs (GRF_ID and MD5)
- PACKET_UDP_SERVER_NEWGRFS, // Sends the list of NewGRF's requested.
- PACKET_UDP_END
-} PacketUDPType;
-
-enum {
- ADVERTISE_NORMAL_INTERVAL = 30000, // interval between advertising in ticks (15 minutes)
- ADVERTISE_RETRY_INTERVAL = 300, // readvertise when no response after this many ticks (9 seconds)
- ADVERTISE_RETRY_TIMES = 3 // give up readvertising after this much failed retries
-};
-
-#define DEF_UDP_RECEIVE_COMMAND(type) void NetworkPacketReceive_ ## type ## _command(Packet *p, struct sockaddr_in *client_addr)
-static void NetworkSendUDP_Packet(SOCKET udp, Packet* p, struct sockaddr_in* recv);
-
-static NetworkClientState _udp_cs;
-
-/**
- * Serializes the GRFIdentifier (GRF ID and MD5 checksum) to the packet
- * @param p the packet to write the data to
- * @param c the configuration to write the GRF ID and MD5 checksum from
- */
-static void NetworkSend_GRFIdentifier(Packet *p, const GRFConfig *c)
-{
- uint j;
- NetworkSend_uint32(p, c->grfid);
- for (j = 0; j < sizeof(c->md5sum); j++) {
- NetworkSend_uint8 (p, c->md5sum[j]);
- }
-}
-
-/**
- * Deserializes the GRFIdentifier (GRF ID and MD5 checksum) from the packet
- * @param p the packet to read the data from
- * @param c the configuration to write the GRF ID and MD5 checksum to
- */
-static void NetworkRecv_GRFIdentifier(Packet *p, GRFConfig *c)
-{
- uint j;
- c->grfid = NetworkRecv_uint32(&_udp_cs, p);
- for (j = 0; j < sizeof(c->md5sum); j++) {
- c->md5sum[j] = NetworkRecv_uint8(&_udp_cs, p);
- }
-}
-
-DEF_UDP_RECEIVE_COMMAND(PACKET_UDP_CLIENT_FIND_SERVER)
-{
- Packet *packet;
- // Just a fail-safe.. should never happen
- if (!_network_udp_server)
- return;
-
- packet = NetworkSend_Init(PACKET_UDP_SERVER_RESPONSE);
-
- // Update some game_info
- _network_game_info.game_date = _date;
- _network_game_info.map_width = MapSizeX();
- _network_game_info.map_height = MapSizeY();
- _network_game_info.map_set = _opt.landscape;
-
- NetworkSend_uint8 (packet, NETWORK_GAME_INFO_VERSION);
-
- /* NETWORK_GAME_INFO_VERSION = 4 */
- {
- /* Only send the GRF Identification (GRF_ID and MD5 checksum) of
- * the GRFs that are needed, i.e. the ones that the server has
- * selected in the NewGRF GUI and not the ones that are used due
- * to the fact that they are in [newgrf-static] in openttd.cfg */
- const GRFConfig *c;
- uint i = 0;
-
- /* Count number of GRFs to send information about */
- for (c = _grfconfig; c != NULL; c = c->next) {
- if (!HASBIT(c->flags, GCF_STATIC)) i++;
- }
- NetworkSend_uint8 (packet, i); // Send number of GRFs
-
- /* Send actual GRF Identifications */
- for (c = _grfconfig; c != NULL; c = c->next) {
- if (!HASBIT(c->flags, GCF_STATIC)) NetworkSend_GRFIdentifier(packet, c);
- }
- }
-
- /* NETWORK_GAME_INFO_VERSION = 3 */
- NetworkSend_uint32(packet, _network_game_info.game_date);
- NetworkSend_uint32(packet, _network_game_info.start_date);
-
- /* NETWORK_GAME_INFO_VERSION = 2 */
- NetworkSend_uint8 (packet, _network_game_info.companies_max);
- NetworkSend_uint8 (packet, ActivePlayerCount());
- NetworkSend_uint8 (packet, _network_game_info.spectators_max);
-
- /* NETWORK_GAME_INFO_VERSION = 1 */
- NetworkSend_string(packet, _network_game_info.server_name);
- NetworkSend_string(packet, _network_game_info.server_revision);
- NetworkSend_uint8 (packet, _network_game_info.server_lang);
- NetworkSend_uint8 (packet, _network_game_info.use_password);
- NetworkSend_uint8 (packet, _network_game_info.clients_max);
- NetworkSend_uint8 (packet, _network_game_info.clients_on);
- NetworkSend_uint8 (packet, NetworkSpectatorCount());
- NetworkSend_string(packet, _network_game_info.map_name);
- NetworkSend_uint16(packet, _network_game_info.map_width);
- NetworkSend_uint16(packet, _network_game_info.map_height);
- NetworkSend_uint8 (packet, _network_game_info.map_set);
- NetworkSend_uint8 (packet, _network_game_info.dedicated);
-
- // Let the client know that we are here
- NetworkSendUDP_Packet(_udp_server_socket, packet, client_addr);
-
- free(packet);
-
- DEBUG(net, 2, "[udp] queried from '%s'", inet_ntoa(client_addr->sin_addr));
-}
-
-DEF_UDP_RECEIVE_COMMAND(PACKET_UDP_SERVER_RESPONSE)
-{
- extern const char _openttd_revision[];
- NetworkGameList *item;
- byte game_info_version;
-
- // Just a fail-safe.. should never happen
- if (_network_udp_server)
- return;
-
- game_info_version = NetworkRecv_uint8(&_udp_cs, p);
-
- if (_udp_cs.has_quit) return;
-
- DEBUG(net, 4, "[udp] server response from %s:%d", inet_ntoa(client_addr->sin_addr),ntohs(client_addr->sin_port));
-
- // Find next item
- item = NetworkGameListAddItem(inet_addr(inet_ntoa(client_addr->sin_addr)), ntohs(client_addr->sin_port));
-
- item->info.compatible = true;
- /* Please observer the order. In the order in which packets are sent
- * they are to be received */
- switch (game_info_version) {
- case 4: {
- GRFConfig *c, **dst = &item->info.grfconfig;
- const GRFConfig *f;
- uint i;
- uint num_grfs = NetworkRecv_uint8(&_udp_cs, p);
-
- for (i = 0; i < num_grfs; i++) {
- c = calloc(1, sizeof(*c));
- NetworkRecv_GRFIdentifier(p, c);
-
- /* Find the matching GRF file */
- f = FindGRFConfig(c->grfid, c->md5sum);
- if (f == NULL) {
- /* Don't know the GRF, so mark game incompatible and the (possibly)
- * already resolved name for this GRF (another server has sent the
- * name of the GRF already */
- item->info.compatible = false;
- c->name = FindUnknownGRFName(c->grfid, c->md5sum, true);
- SETBIT(c->flags, GCF_NOT_FOUND);
- } else {
- c->filename = f->filename;
- c->name = f->name;
- c->info = f->info;
- }
- SETBIT(c->flags, GCF_COPY);
-
- /* Append GRFConfig to the list */
- *dst = c;
- dst = &c->next;
- }
- } /* Fallthrough */
- case 3:
- item->info.game_date = NetworkRecv_uint32(&_udp_cs, p);
- item->info.start_date = NetworkRecv_uint32(&_udp_cs, p);
- /* Fallthrough */
- case 2:
- item->info.companies_max = NetworkRecv_uint8(&_udp_cs, p);
- item->info.companies_on = NetworkRecv_uint8(&_udp_cs, p);
- item->info.spectators_max = NetworkRecv_uint8(&_udp_cs, p);
- /* Fallthrough */
- case 1:
- NetworkRecv_string(&_udp_cs, p, item->info.server_name, sizeof(item->info.server_name));
- NetworkRecv_string(&_udp_cs, p, item->info.server_revision, sizeof(item->info.server_revision));
- item->info.server_lang = NetworkRecv_uint8(&_udp_cs, p);
- item->info.use_password = NetworkRecv_uint8(&_udp_cs, p);
- item->info.clients_max = NetworkRecv_uint8(&_udp_cs, p);
- item->info.clients_on = NetworkRecv_uint8(&_udp_cs, p);
- item->info.spectators_on = NetworkRecv_uint8(&_udp_cs, p);
- if (game_info_version < 3) { // 16 bits dates got scrapped and are read earlier
- item->info.game_date = NetworkRecv_uint16(&_udp_cs, p) + DAYS_TILL_ORIGINAL_BASE_YEAR;
- item->info.start_date = NetworkRecv_uint16(&_udp_cs, p) + DAYS_TILL_ORIGINAL_BASE_YEAR;
- }
- NetworkRecv_string(&_udp_cs, p, item->info.map_name, sizeof(item->info.map_name));
- item->info.map_width = NetworkRecv_uint16(&_udp_cs, p);
- item->info.map_height = NetworkRecv_uint16(&_udp_cs, p);
- item->info.map_set = NetworkRecv_uint8(&_udp_cs, p);
- item->info.dedicated = NetworkRecv_uint8(&_udp_cs, p);
-
- if (item->info.server_lang >= NETWORK_NUM_LANGUAGES) item->info.server_lang = 0;
- if (item->info.map_set >= NUM_LANDSCAPE ) item->info.map_set = 0;
-
- if (item->info.hostname[0] == '\0')
- snprintf(item->info.hostname, sizeof(item->info.hostname), "%s", inet_ntoa(client_addr->sin_addr));
-
- /* Check if we are allowed on this server based on the revision-match */
- item->info.version_compatible =
- strcmp(item->info.server_revision, _openttd_revision) == 0 ||
- strcmp(item->info.server_revision, NOREV_STRING) == 0;
- item->info.compatible &= item->info.version_compatible; // Already contains match for GRFs
- break;
- }
-
- {
- /* Checks whether there needs to be a request for names of GRFs and makes
- * the request if necessary. GRFs that need to be requested are the GRFs
- * that do not exist on the clients system and we do not have the name
- * resolved of, i.e. the name is still UNKNOWN_GRF_NAME_PLACEHOLDER.
- * The in_request array and in_request_count are used so there is no need
- * to do a second loop over the GRF list, which can be relatively expensive
- * due to the string comparisons. */
- const GRFConfig *in_request[NETWORK_MAX_GRF_COUNT];
- const GRFConfig *c;
- uint in_request_count = 0;
- struct sockaddr_in out_addr;
-
- for (c = item->info.grfconfig; c != NULL; c = c->next) {
- if (!HASBIT(c->flags, GCF_NOT_FOUND) || strcmp(c->name, UNKNOWN_GRF_NAME_PLACEHOLDER) != 0) continue;
- in_request[in_request_count] = c;
- in_request_count++;
- }
-
- if (in_request_count > 0) {
- /* There are 'unknown' GRFs, now send a request for them */
- uint i;
- Packet *packet = NetworkSend_Init(PACKET_UDP_CLIENT_GET_NEWGRFS);
-
- NetworkSend_uint8 (packet, in_request_count);
- for (i = 0; i < in_request_count; i++) {
- NetworkSend_GRFIdentifier(packet, in_request[i]);
- }
-
- out_addr.sin_family = AF_INET;
- out_addr.sin_port = htons(item->port);
- out_addr.sin_addr.s_addr = item->ip;
- NetworkSendUDP_Packet(_udp_client_socket, packet, &out_addr);
- free(packet);
- }
- }
-
- item->online = true;
-
- UpdateNetworkGameWindow(false);
-}
-
-DEF_UDP_RECEIVE_COMMAND(PACKET_UDP_CLIENT_DETAIL_INFO)
-{
- NetworkClientState *cs;
- NetworkClientInfo *ci;
- Packet *packet;
- Player *player;
- byte current = 0;
- int i;
-
- // Just a fail-safe.. should never happen
- if (!_network_udp_server) return;
-
- packet = NetworkSend_Init(PACKET_UDP_SERVER_DETAIL_INFO);
-
- /* Send the amount of active companies */
- NetworkSend_uint8 (packet, NETWORK_COMPANY_INFO_VERSION);
- NetworkSend_uint8 (packet, ActivePlayerCount());
-
- /* Fetch the latest version of everything */
- NetworkPopulateCompanyInfo();
-
- /* Go through all the players */
- FOR_ALL_PLAYERS(player) {
- /* Skip non-active players */
- if (!player->is_active) continue;
-
- current++;
-
- /* Send the information */
- NetworkSend_uint8(packet, current);
-
- NetworkSend_string(packet, _network_player_info[player->index].company_name);
- NetworkSend_uint32(packet, _network_player_info[player->index].inaugurated_year);
- NetworkSend_uint64(packet, _network_player_info[player->index].company_value);
- NetworkSend_uint64(packet, _network_player_info[player->index].money);
- NetworkSend_uint64(packet, _network_player_info[player->index].income);
- NetworkSend_uint16(packet, _network_player_info[player->index].performance);
-
- /* Send 1 if there is a passord for the company else send 0 */
- if (_network_player_info[player->index].password[0] != '\0') {
- NetworkSend_uint8(packet, 1);
- } else {
- NetworkSend_uint8(packet, 0);
- }
-
- for (i = 0; i < NETWORK_VEHICLE_TYPES; i++)
- NetworkSend_uint16(packet, _network_player_info[player->index].num_vehicle[i]);
-
- for (i = 0; i < NETWORK_STATION_TYPES; i++)
- NetworkSend_uint16(packet, _network_player_info[player->index].num_station[i]);
-
- /* Find the clients that are connected to this player */
- FOR_ALL_CLIENTS(cs) {
- ci = DEREF_CLIENT_INFO(cs);
- if (ci->client_playas == player->index) {
- /* The uint8 == 1 indicates that a client is following */
- NetworkSend_uint8(packet, 1);
- NetworkSend_string(packet, ci->client_name);
- NetworkSend_string(packet, ci->unique_id);
- NetworkSend_uint32(packet, ci->join_date);
- }
- }
- /* Also check for the server itself */
- ci = NetworkFindClientInfoFromIndex(NETWORK_SERVER_INDEX);
- if (ci->client_playas == player->index) {
- /* The uint8 == 1 indicates that a client is following */
- NetworkSend_uint8(packet, 1);
- NetworkSend_string(packet, ci->client_name);
- NetworkSend_string(packet, ci->unique_id);
- NetworkSend_uint32(packet, ci->join_date);
- }
-
- /* Indicates end of client list */
- NetworkSend_uint8(packet, 0);
- }
-
- /* And check if we have any spectators */
- FOR_ALL_CLIENTS(cs) {
- ci = DEREF_CLIENT_INFO(cs);
- if (!IsValidPlayer(ci->client_playas)) {
- /* The uint8 == 1 indicates that a client is following */
- NetworkSend_uint8(packet, 1);
- NetworkSend_string(packet, ci->client_name);
- NetworkSend_string(packet, ci->unique_id);
- NetworkSend_uint32(packet, ci->join_date);
- }
- }
-
- /* Also check for the server itself */
- ci = NetworkFindClientInfoFromIndex(NETWORK_SERVER_INDEX);
- if (!IsValidPlayer(ci->client_playas)) {
- /* The uint8 == 1 indicates that a client is following */
- NetworkSend_uint8(packet, 1);
- NetworkSend_string(packet, ci->client_name);
- NetworkSend_string(packet, ci->unique_id);
- NetworkSend_uint32(packet, ci->join_date);
- }
-
- /* Indicates end of client list */
- NetworkSend_uint8(packet, 0);
-
- NetworkSendUDP_Packet(_udp_server_socket, packet, client_addr);
-
- free(packet);
-}
-
-DEF_UDP_RECEIVE_COMMAND(PACKET_UDP_MASTER_RESPONSE_LIST)
-{
- int i;
- struct in_addr ip;
- uint16 port;
- uint8 ver;
-
- /* packet begins with the protocol version (uint8)
- * then an uint16 which indicates how many
- * ip:port pairs are in this packet, after that
- * an uint32 (ip) and an uint16 (port) for each pair
- */
-
- ver = NetworkRecv_uint8(&_udp_cs, p);
-
- if (_udp_cs.has_quit) return;
-
- if (ver == 1) {
- for (i = NetworkRecv_uint16(&_udp_cs, p); i != 0 ; i--) {
- ip.s_addr = TO_LE32(NetworkRecv_uint32(&_udp_cs, p));
- port = NetworkRecv_uint16(&_udp_cs, p);
- NetworkUDPQueryServer(inet_ntoa(ip), port);
- }
- }
-}
-
-DEF_UDP_RECEIVE_COMMAND(PACKET_UDP_MASTER_ACK_REGISTER)
-{
- _network_advertise_retries = 0;
- DEBUG(net, 2, "[udp] advertising on master server successfull");
-
- /* We are advertised, but we don't want to! */
- if (!_network_advertise) NetworkUDPRemoveAdvertise();
-}
-
-/**
- * A client has requested the names of some NewGRFs.
- *
- * Replying this can be tricky as we have a limit of SEND_MTU bytes
- * in the reply packet and we can send up to 100 bytes per NewGRF
- * (GRF ID, MD5sum and NETWORK_GRF_NAME_LENGTH bytes for the name).
- * As SEND_MTU is _much_ less than 100 * NETWORK_MAX_GRF_COUNT, it
- * could be that a packet overflows. To stop this we only reply
- * with the first N NewGRFs so that if the first N + 1 NewGRFs
- * would be sent, the packet overflows.
- * in_reply and in_reply_count are used to keep a list of GRFs to
- * send in the reply.
- */
-DEF_UDP_RECEIVE_COMMAND(PACKET_UDP_CLIENT_GET_NEWGRFS)
-{
- uint8 num_grfs;
- uint i;
-
- const GRFConfig *in_reply[NETWORK_MAX_GRF_COUNT];
- Packet *packet;
- uint8 in_reply_count = 0;
- uint packet_len = 0;
-
- /* Just a fail-safe.. should never happen */
- if (_udp_cs.has_quit) return;
-
- DEBUG(net, 6, "[udp] newgrf data request from %s:%d", inet_ntoa(client_addr->sin_addr), ntohs(client_addr->sin_port));
-
- num_grfs = NetworkRecv_uint8 (&_udp_cs, p);
- if (num_grfs > NETWORK_MAX_GRF_COUNT) return;
-
- for (i = 0; i < num_grfs; i++) {
- GRFConfig c;
- const GRFConfig *f;
-
- NetworkRecv_GRFIdentifier(p, &c);
-
- /* Find the matching GRF file */
- f = FindGRFConfig(c.grfid, c.md5sum);
- if (f == NULL) continue; // The GRF is unknown to this server
-
- /* If the reply might exceed the size of the packet, only reply
- * the current list and do not send the other data.
- * The name could be an empty string, if so take the filename. */
- packet_len += sizeof(c.grfid) + sizeof(c.md5sum) +
- min(strlen((f->name != NULL && strlen(f->name) > 0) ? f->name : f->filename) + 1, NETWORK_GRF_NAME_LENGTH);
- if (packet_len > SEND_MTU - 4) { // 4 is 3 byte header + grf count in reply
- break;
- }
- in_reply[in_reply_count] = f;
- in_reply_count++;
- }
-
- if (in_reply_count == 0) return;
-
- packet = NetworkSend_Init(PACKET_UDP_SERVER_NEWGRFS);
- NetworkSend_uint8 (packet, in_reply_count);
- for (i = 0; i < in_reply_count; i++) {
- char name[NETWORK_GRF_NAME_LENGTH];
-
- /* The name could be an empty string, if so take the filename */
- ttd_strlcpy(name, (in_reply[i]->name != NULL && strlen(in_reply[i]->name) > 0) ?
- in_reply[i]->name : in_reply[i]->filename, sizeof(name));
- NetworkSend_GRFIdentifier(packet, in_reply[i]);
- NetworkSend_string(packet, name);
- }
-
- NetworkSendUDP_Packet(_udp_server_socket, packet, client_addr);
- free(packet);
-}
-
-/** The return of the client's request of the names of some NewGRFs */
-DEF_UDP_RECEIVE_COMMAND(PACKET_UDP_SERVER_NEWGRFS)
-{
- uint8 num_grfs;
- uint i;
-
- /* Just a fail-safe.. should never happen */
- if (_udp_cs.has_quit) return;
-
- DEBUG(net, 6, "[udp] newgrf data reply from %s:%d", inet_ntoa(client_addr->sin_addr),ntohs(client_addr->sin_port));
-
- num_grfs = NetworkRecv_uint8 (&_udp_cs, p);
- if (num_grfs > NETWORK_MAX_GRF_COUNT) return;
-
- for (i = 0; i < num_grfs; i++) {
- char *unknown_name;
- char name[NETWORK_GRF_NAME_LENGTH];
- GRFConfig c;
-
- NetworkRecv_GRFIdentifier(p, &c);
- NetworkRecv_string(&_udp_cs, p, name, sizeof(name));
-
- /* An empty name is not possible under normal circumstances
- * and causes problems when showing the NewGRF list. */
- if (strlen(name) == 0) continue;
-
- /* Finds the fake GRFConfig for the just read GRF ID and MD5sum tuple.
- * If it exists and not resolved yet, then name of the fake GRF is
- * overwritten with the name from the reply. */
- unknown_name = FindUnknownGRFName(c.grfid, c.md5sum, false);
- if (unknown_name != NULL && strcmp(unknown_name, UNKNOWN_GRF_NAME_PLACEHOLDER) == 0) {
- ttd_strlcpy(unknown_name, name, NETWORK_GRF_NAME_LENGTH);
- }
- }
-}
-
-
-// The layout for the receive-functions by UDP
-typedef void NetworkUDPPacket(Packet *p, struct sockaddr_in *client_addr);
-
-static NetworkUDPPacket* const _network_udp_packet[] = {
- RECEIVE_COMMAND(PACKET_UDP_CLIENT_FIND_SERVER),
- RECEIVE_COMMAND(PACKET_UDP_SERVER_RESPONSE),
- RECEIVE_COMMAND(PACKET_UDP_CLIENT_DETAIL_INFO),
- NULL,
- NULL,
- RECEIVE_COMMAND(PACKET_UDP_MASTER_ACK_REGISTER),
- NULL,
- RECEIVE_COMMAND(PACKET_UDP_MASTER_RESPONSE_LIST),
- NULL,
- RECEIVE_COMMAND(PACKET_UDP_CLIENT_GET_NEWGRFS),
- RECEIVE_COMMAND(PACKET_UDP_SERVER_NEWGRFS),
-};
-
-
-// If this fails, check the array above with network_data.h
-assert_compile(lengthof(_network_udp_packet) == PACKET_UDP_END);
-
-
-static void NetworkHandleUDPPacket(Packet* p, struct sockaddr_in* client_addr)
-{
- byte type;
-
- /* Fake a client, so we can see when there is an illegal packet */
- _udp_cs.socket = INVALID_SOCKET;
- _udp_cs.has_quit = false;
-
- type = NetworkRecv_uint8(&_udp_cs, p);
-
- if (type < PACKET_UDP_END && _network_udp_packet[type] != NULL && !_udp_cs.has_quit) {
- _network_udp_packet[type](p, client_addr);
- } else {
- if (!_udp_cs.has_quit) {
- DEBUG(net, 0, "[udp] received invalid packet type %d", type);
- } else {
- DEBUG(net, 0, "[udp] received illegal packet");
- }
- }
-}
-
-
-// Send a packet over UDP
-static void NetworkSendUDP_Packet(SOCKET udp, Packet* p, struct sockaddr_in* recv)
-{
- int res;
-
- // Put the length in the buffer
- p->buffer[0] = p->size & 0xFF;
- p->buffer[1] = p->size >> 8;
-
- // Send the buffer
- res = sendto(udp, p->buffer, p->size, 0, (struct sockaddr *)recv, sizeof(*recv));
-
- // Check for any errors, but ignore it otherwise
- if (res == -1) DEBUG(net, 1, "[udp] sendto failed with: %i", GET_LAST_ERROR());
-}
-
-// Start UDP listener
-bool NetworkUDPListen(SOCKET *udp, uint32 host, uint16 port, bool broadcast)
-{
- struct sockaddr_in sin;
-
- // Make sure socket is closed
- closesocket(*udp);
-
- *udp = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
- if (*udp == INVALID_SOCKET) {
- DEBUG(net, 0, "[udp] failed to start UDP listener");
- return false;
- }
-
- // set nonblocking mode for socket
- {
- unsigned long blocking = 1;
-#ifndef BEOS_NET_SERVER
- ioctlsocket(*udp, FIONBIO, &blocking);
-#else
- setsockopt(*udp, SOL_SOCKET, SO_NONBLOCK, &blocking, NULL);
-#endif
- }
-
- sin.sin_family = AF_INET;
- // Listen on all IPs
- sin.sin_addr.s_addr = host;
- sin.sin_port = htons(port);
-
- if (bind(*udp, (struct sockaddr*)&sin, sizeof(sin)) != 0) {
- DEBUG(net, 0, "[udp] bind failed on %s:%i", inet_ntoa(*(struct in_addr *)&host), port);
- return false;
- }
-
- if (broadcast) {
- /* Enable broadcast */
- unsigned long val = 1;
-#ifndef BEOS_NET_SERVER // will work around this, some day; maybe.
- setsockopt(*udp, SOL_SOCKET, SO_BROADCAST, (char *) &val , sizeof(val));
-#endif
- }
-
- DEBUG(net, 1, "[udp] listening on port %s:%d", inet_ntoa(*(struct in_addr *)&host), port);
-
- return true;
-}
-
-// Close UDP connection
-void NetworkUDPClose(void)
-{
- DEBUG(net, 1, "[udp] closed listeners");
-
- if (_network_udp_server) {
- if (_udp_server_socket != INVALID_SOCKET) {
- closesocket(_udp_server_socket);
- _udp_server_socket = INVALID_SOCKET;
- }
-
- if (_udp_master_socket != INVALID_SOCKET) {
- closesocket(_udp_master_socket);
- _udp_master_socket = INVALID_SOCKET;
- }
-
- _network_udp_server = false;
- _network_udp_broadcast = 0;
- } else {
- if (_udp_client_socket != INVALID_SOCKET) {
- closesocket(_udp_client_socket);
- _udp_client_socket = INVALID_SOCKET;
- }
- _network_udp_broadcast = 0;
- }
-}
-
-// Receive something on UDP level
-void NetworkUDPReceive(SOCKET udp)
-{
- struct sockaddr_in client_addr;
- socklen_t client_len;
- int nbytes;
- static Packet *p = NULL;
- int packet_len;
-
- // If p is NULL, malloc him.. this prevents unneeded mallocs
- if (p == NULL) p = malloc(sizeof(*p));
-
- packet_len = sizeof(p->buffer);
- client_len = sizeof(client_addr);
-
- // Try to receive anything
- nbytes = recvfrom(udp, p->buffer, packet_len, 0, (struct sockaddr *)&client_addr, &client_len);
-
- // We got some bytes.. just asume we receive the whole packet
- if (nbytes > 0) {
- // Get the size of the buffer
- p->size = (uint16)p->buffer[0];
- p->size += (uint16)p->buffer[1] << 8;
- // Put the position on the right place
- p->pos = 2;
- p->next = NULL;
-
- // Handle the packet
- NetworkHandleUDPPacket(p, &client_addr);
-
- // Free the packet
- free(p);
- p = NULL;
- }
-}
-
-// Broadcast to all ips
-static void NetworkUDPBroadCast(SOCKET udp)
-{
- Packet* p = NetworkSend_Init(PACKET_UDP_CLIENT_FIND_SERVER);
- uint i;
-
- for (i = 0; _broadcast_list[i] != 0; i++) {
- struct sockaddr_in out_addr;
-
- out_addr.sin_family = AF_INET;
- out_addr.sin_port = htons(_network_server_port);
- out_addr.sin_addr.s_addr = _broadcast_list[i];
-
- DEBUG(net, 4, "[udp] broadcasting to %s", inet_ntoa(out_addr.sin_addr));
-
- NetworkSendUDP_Packet(udp, p, &out_addr);
- }
-
- free(p);
-}
-
-
-// Request the the server-list from the master server
-void NetworkUDPQueryMasterServer(void)
-{
- struct sockaddr_in out_addr;
- Packet *p;
-
- if (_udp_client_socket == INVALID_SOCKET)
- if (!NetworkUDPListen(&_udp_client_socket, 0, 0, true))
- return;
-
- p = NetworkSend_Init(PACKET_UDP_CLIENT_GET_LIST);
-
- out_addr.sin_family = AF_INET;
- out_addr.sin_port = htons(NETWORK_MASTER_SERVER_PORT);
- out_addr.sin_addr.s_addr = NetworkResolveHost(NETWORK_MASTER_SERVER_HOST);
-
- // packet only contains protocol version
- NetworkSend_uint8(p, NETWORK_MASTER_SERVER_VERSION);
-
- NetworkSendUDP_Packet(_udp_client_socket, p, &out_addr);
-
- DEBUG(net, 2, "[udp] master server queried at %s:%d", inet_ntoa(out_addr.sin_addr),ntohs(out_addr.sin_port));
-
- free(p);
-}
-
-// Find all servers
-void NetworkUDPSearchGame(void)
-{
- // We are still searching..
- if (_network_udp_broadcast > 0) return;
-
- // No UDP-socket yet..
- if (_udp_client_socket == INVALID_SOCKET)
- if (!NetworkUDPListen(&_udp_client_socket, 0, 0, true))
- return;
-
- DEBUG(net, 0, "[udp] searching server");
-
- NetworkUDPBroadCast(_udp_client_socket);
- _network_udp_broadcast = 300; // Stay searching for 300 ticks
-}
-
-NetworkGameList *NetworkUDPQueryServer(const char* host, unsigned short port)
-{
- struct sockaddr_in out_addr;
- Packet *p;
- NetworkGameList *item;
-
- // No UDP-socket yet..
- if (_udp_client_socket == INVALID_SOCKET)
- if (!NetworkUDPListen(&_udp_client_socket, 0, 0, true))
- return NULL;
-
- out_addr.sin_family = AF_INET;
- out_addr.sin_port = htons(port);
- out_addr.sin_addr.s_addr = NetworkResolveHost(host);
-
- // Clear item in gamelist
- item = NetworkGameListAddItem(inet_addr(inet_ntoa(out_addr.sin_addr)), ntohs(out_addr.sin_port));
- memset(&item->info, 0, sizeof(item->info));
- ttd_strlcpy(item->info.server_name, host, lengthof(item->info.server_name));
- ttd_strlcpy(item->info.hostname, host, lengthof(item->info.hostname));
- item->online = false;
-
- // Init the packet
- p = NetworkSend_Init(PACKET_UDP_CLIENT_FIND_SERVER);
-
- NetworkSendUDP_Packet(_udp_client_socket, p, &out_addr);
-
- free(p);
-
- UpdateNetworkGameWindow(false);
- return item;
-}
-
-/* Remove our advertise from the master-server */
-void NetworkUDPRemoveAdvertise(void)
-{
- struct sockaddr_in out_addr;
- Packet *p;
-
- /* Check if we are advertising */
- if (!_networking || !_network_server || !_network_udp_server) return;
-
- /* check for socket */
- if (_udp_master_socket == INVALID_SOCKET)
- if (!NetworkUDPListen(&_udp_master_socket, _network_server_bind_ip, 0, false))
- return;
-
- DEBUG(net, 1, "[udp] removing advertise from master server");
-
- /* Find somewhere to send */
- out_addr.sin_family = AF_INET;
- out_addr.sin_port = htons(NETWORK_MASTER_SERVER_PORT);
- out_addr.sin_addr.s_addr = NetworkResolveHost(NETWORK_MASTER_SERVER_HOST);
-
- /* Send the packet */
- p = NetworkSend_Init(PACKET_UDP_SERVER_UNREGISTER);
- /* Packet is: Version, server_port */
- NetworkSend_uint8(p, NETWORK_MASTER_SERVER_VERSION);
- NetworkSend_uint16(p, _network_server_port);
- NetworkSendUDP_Packet(_udp_master_socket, p, &out_addr);
-
- free(p);
-}
-
-/* Register us to the master server
- This function checks if it needs to send an advertise */
-void NetworkUDPAdvertise(void)
-{
- struct sockaddr_in out_addr;
- Packet *p;
-
- /* Check if we should send an advertise */
- if (!_networking || !_network_server || !_network_udp_server || !_network_advertise)
- return;
-
- /* check for socket */
- if (_udp_master_socket == INVALID_SOCKET)
- if (!NetworkUDPListen(&_udp_master_socket, _network_server_bind_ip, 0, false))
- return;
-
- if (_network_need_advertise) {
- _network_need_advertise = false;
- _network_advertise_retries = ADVERTISE_RETRY_TIMES;
- } else {
- /* Only send once every ADVERTISE_NORMAL_INTERVAL ticks */
- if (_network_advertise_retries == 0) {
- if ((_network_last_advertise_frame + ADVERTISE_NORMAL_INTERVAL) > _frame_counter)
- return;
- _network_advertise_retries = ADVERTISE_RETRY_TIMES;
- }
-
- if ((_network_last_advertise_frame + ADVERTISE_RETRY_INTERVAL) > _frame_counter)
- return;
- }
-
- _network_advertise_retries--;
- _network_last_advertise_frame = _frame_counter;
-
- /* Find somewhere to send */
- out_addr.sin_family = AF_INET;
- out_addr.sin_port = htons(NETWORK_MASTER_SERVER_PORT);
- out_addr.sin_addr.s_addr = NetworkResolveHost(NETWORK_MASTER_SERVER_HOST);
-
- DEBUG(net, 1, "[udp] advertising to master server");
-
- /* Send the packet */
- p = NetworkSend_Init(PACKET_UDP_SERVER_REGISTER);
- /* Packet is: WELCOME_MESSAGE, Version, server_port */
- NetworkSend_string(p, NETWORK_MASTER_SERVER_WELCOME_MESSAGE);
- NetworkSend_uint8(p, NETWORK_MASTER_SERVER_VERSION);
- NetworkSend_uint16(p, _network_server_port);
- NetworkSendUDP_Packet(_udp_master_socket, p, &out_addr);
-
- free(p);
-}
-
-void NetworkUDPInitialize(void)
-{
- _udp_client_socket = INVALID_SOCKET;
- _udp_server_socket = INVALID_SOCKET;
- _udp_master_socket = INVALID_SOCKET;
-
- _network_udp_server = false;
- _network_udp_broadcast = 0;
-}
-
-#endif /* ENABLE_NETWORK */