1 | /* |
1 | /* |
2 | CrossFire, A Multiplayer game for X-windows |
2 | CrossFire, A Multiplayer game for X-windows |
3 | |
3 | |
|
|
4 | Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team |
4 | Copyright (C) 2001 Mark Wedel |
5 | Copyright (C) 2001 Mark Wedel |
5 | Copyright (C) 1992 Frank Tore Johansen |
6 | Copyright (C) 1992 Frank Tore Johansen |
6 | |
7 | |
7 | This program is free software; you can redistribute it and/or modify |
8 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by |
9 | it under the terms of the GNU General Public License as published by |
… | |
… | |
29 | * |
30 | * |
30 | * Mainly deals with initialization and higher level socket |
31 | * Mainly deals with initialization and higher level socket |
31 | * maintenance (checking for lost connections and if data has arrived.) |
32 | * maintenance (checking for lost connections and if data has arrived.) |
32 | * The reading of data is handled in ericserver.c |
33 | * The reading of data is handled in ericserver.c |
33 | */ |
34 | */ |
34 | |
|
|
35 | |
35 | |
36 | #include <global.h> |
36 | #include <global.h> |
37 | #include <sproto.h> |
37 | #include <sproto.h> |
38 | #include <sys/types.h> |
38 | #include <sys/types.h> |
39 | #include <sys/time.h> |
39 | #include <sys/time.h> |
40 | #include <sys/socket.h> |
40 | #include <sys/socket.h> |
41 | #include <netinet/in.h> |
41 | #include <netinet/in.h> |
|
|
42 | #include <netinet/tcp.h> |
|
|
43 | #include <netinet/ip.h> |
42 | #include <netdb.h> |
44 | #include <netdb.h> |
43 | |
45 | |
44 | #ifdef HAVE_UNISTD_H |
|
|
45 | # include <unistd.h> |
46 | #include <unistd.h> |
46 | #endif |
|
|
47 | |
|
|
48 | #ifdef HAVE_ARPA_INET_H |
|
|
49 | # include <arpa/inet.h> |
47 | #include <arpa/inet.h> |
50 | #endif |
|
|
51 | #include <newserver.h> |
|
|
52 | |
48 | |
53 | Socket_Info socket_info; |
49 | #include <algorithm> |
54 | NewSocket *init_sockets; |
50 | |
|
|
51 | sockvec clients; |
55 | |
52 | |
56 | /** |
53 | /** |
57 | * Initializes a connection. Really, it just sets up the data structure, |
54 | * Initializes a connection. Really, it just sets up the data structure, |
58 | * socket setup is handled elsewhere. We do send a version to the |
55 | * socket setup is handled elsewhere. We do send a version to the |
59 | * client. |
56 | * client. |
60 | */ |
57 | */ |
61 | void |
58 | client::client (int fd, const char *peername) |
62 | InitConnection (NewSocket *ns, const char *from_ip) |
59 | : fd (fd), host (strdup (peername)), |
|
|
60 | socket_ev (this, &client::socket_cb), |
|
|
61 | cmd_ev (this, &client::cmd_cb), |
|
|
62 | cc_inv (this), cc_other (this) |
63 | { |
63 | { |
64 | SockList sl; |
64 | { |
65 | char buf[256]; |
65 | struct linger linger_opt; |
66 | int bufsize = 65535; /*Supposed absolute upper limit */ |
|
|
67 | int oldbufsize; |
|
|
68 | int buflen = sizeof (int); |
|
|
69 | |
66 | |
70 | if (fcntl (ns->fd, F_SETFL, O_NONBLOCK) == -1) |
67 | linger_opt.l_onoff = 0; |
71 | LOG (llevError, "InitConnection: Error on fcntl.\n"); |
68 | linger_opt.l_linger = 0; |
72 | |
69 | |
73 | if (getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) |
70 | if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger))) |
74 | oldbufsize = 0; |
71 | LOG (llevError, "SO_LINGER: %s\n", strerror (errno)); |
|
|
72 | } |
75 | |
73 | |
76 | if (oldbufsize < bufsize) |
74 | { |
77 | if (setsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) |
75 | int val = IPTOS_LOWDELAY; |
78 | LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); |
|
|
79 | |
76 | |
80 | buflen = sizeof (oldbufsize); |
77 | if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val))) |
81 | getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
78 | LOG (llevError, "IP_TOS: %s\n", strerror (errno)); |
82 | #ifdef ESRV_DEBUG |
79 | } |
83 | LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize); |
80 | |
|
|
81 | { |
|
|
82 | int val = 1; |
|
|
83 | |
|
|
84 | if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val))) |
|
|
85 | LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno)); |
|
|
86 | } |
|
|
87 | |
|
|
88 | #ifdef __linux__ |
|
|
89 | { |
|
|
90 | int val; |
|
|
91 | |
|
|
92 | // set some very aggressive keepalive parameters |
|
|
93 | val = 10; |
|
|
94 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val))) |
|
|
95 | LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno)); |
|
|
96 | |
|
|
97 | val = 5; |
|
|
98 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val))) |
|
|
99 | LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno)); |
|
|
100 | |
|
|
101 | val = 1; |
|
|
102 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val))) |
|
|
103 | LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno)); |
|
|
104 | } |
84 | #endif |
105 | #endif |
85 | |
106 | |
86 | ns->faceset = 0; |
107 | { |
87 | ns->facecache = 0; |
108 | int bufsize = 65535; /*Supposed absolute upper limit */ |
88 | ns->image2 = 0; |
109 | int oldbufsize; |
89 | ns->sound = 0; |
110 | int buflen = sizeof (int); |
90 | ns->exp64 = 0; |
111 | |
91 | ns->monitor_spells = 0; |
112 | if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1) |
|
|
113 | LOG (llevError, "InitConnection: Error on fcntl.\n"); |
|
|
114 | |
|
|
115 | if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) |
|
|
116 | oldbufsize = 0; |
|
|
117 | |
|
|
118 | if (oldbufsize < bufsize) |
|
|
119 | if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) |
|
|
120 | LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); |
|
|
121 | |
|
|
122 | buflen = sizeof (oldbufsize); |
|
|
123 | getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
|
|
124 | } |
|
|
125 | |
|
|
126 | state = ST_SETUP; |
92 | ns->mapmode = Map0Cmd; |
127 | mapmode = Map0Cmd; |
93 | ns->darkness = 1; |
128 | darkness = 1; |
94 | ns->status = Ns_Add; |
|
|
95 | ns->mapx = 11; |
129 | mapx = 11; |
96 | ns->mapy = 11; |
130 | mapy = 11; |
97 | ns->newmapcmd = 0; |
|
|
98 | ns->itemcmd = 1; /* Default is version item1 command */ |
131 | itemcmd = 1; /* Default is version item1 command */ |
99 | ns->ext_mapinfos = 0; /*extendedmapinfo datas */ |
|
|
100 | ns->EMI_smooth = 0; |
|
|
101 | ns->look_position = 0; |
|
|
102 | ns->update_look = 0; |
|
|
103 | ns->has_readable_type = 0; |
|
|
104 | ns->supported_readables = 0; |
|
|
105 | ns->monitor_spells = 0; |
|
|
106 | ns->mapinfocmd = 0; |
|
|
107 | ns->extcmd = 0; |
|
|
108 | ns->extmap = 0; |
|
|
109 | |
132 | |
110 | /* we should really do some checking here - if total clients overflows |
133 | faces_sent = salloc0<uint8> (nrofpixmaps); |
111 | * we need to do something more intelligent, because client id's will start |
134 | |
112 | * duplicating (not likely in normal cases, but malicous attacks that |
|
|
113 | * just open and close connections could get this total up. |
|
|
114 | */ |
|
|
115 | ns->inbuf.len = 0; |
|
|
116 | ns->inbuf.buf = (unsigned char *) malloc (sizeof (unsigned char) * MAXSOCKBUF); |
|
|
117 | /* Basic initialization. Needed because we do a check in |
|
|
118 | * HandleClient for oldsocketmode without checking the |
|
|
119 | * length of data. |
|
|
120 | */ |
|
|
121 | memset (ns->inbuf.buf, 0, sizeof (unsigned char) * MAXSOCKBUF); |
|
|
122 | memset (&ns->lastmap, 0, sizeof (struct Map)); |
|
|
123 | memset (ns->faces_sent, 0, ns->faces_sent_len * sizeof (*ns->faces_sent)); |
|
|
124 | memset (&ns->anims_sent, 0, sizeof (ns->anims_sent)); |
|
|
125 | memset (&ns->stats, 0, sizeof (struct statsinfo)); |
|
|
126 | /* Do this so we don't send a face command for the client for |
135 | /* Do this so we don't send a face command for the client for |
127 | * this face. Face 0 is sent to the client to say clear |
136 | * this face. Face 0 is sent to the client to say clear |
128 | * face information. |
137 | * face information. |
129 | */ |
138 | */ |
130 | ns->faces_sent[0] = NS_FACESENT_FACE; |
139 | faces_sent[0] = NS_FACESENT_FACE; |
131 | |
140 | |
132 | ns->outputbuffer.start = 0; |
141 | // socket I/O is low priority |
133 | ns->outputbuffer.len = 0; |
142 | // we prefer to have the server run instead of handling client requests |
134 | ns->can_write = 1; |
143 | socket_ev.prio (PE_PRIO_NORMAL + 1); |
135 | ns->password_fails = 0; |
144 | socket_ev.fd (fd); |
|
|
145 | socket_ev.poll (PE_R); |
136 | |
146 | |
137 | ns->current_map = 0; |
147 | // command handling is even lower priority |
138 | ns->current_x = 0; |
148 | // that way no client can monopolise the server |
139 | ns->current_y = 0; |
149 | cmd_ev.prio (PE_PRIO_NORMAL + 2); |
140 | ns->client[0] = 0; |
|
|
141 | ns->buggy_mapscroll = 0; |
|
|
142 | |
150 | |
143 | ns->sent_scroll = 0; |
151 | // initialisation done, kick it! |
144 | ns->host = strdup_local (from_ip); |
|
|
145 | sprintf ((char *) buf, "version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); |
152 | send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); |
146 | sl.buf = (unsigned char *) buf; |
153 | flush (); |
147 | sl.len = strlen ((char *) buf); |
154 | |
148 | Send_With_Handling (ns, &sl); |
155 | // clients are externally referenced by the socket |
149 | #ifdef CS_LOGSTATS |
156 | refcnt_inc (); |
150 | if (socket_info.nconns > cst_tot.max_conn) |
157 | clients.push_back (this); |
151 | cst_tot.max_conn = socket_info.nconns; |
158 | |
152 | if (socket_info.nconns > cst_lst.max_conn) |
159 | #if 0//TODO |
153 | cst_lst.max_conn = socket_info.nconns; |
160 | socket_info.nconns++; |
|
|
161 | if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns; |
|
|
162 | if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns; |
154 | #endif |
163 | #endif |
155 | } |
164 | } |
156 | |
165 | |
|
|
166 | client::~client () |
|
|
167 | { |
|
|
168 | sockvec::iterator i = find (clients.begin (), clients.end (), this); |
|
|
169 | if (i != clients.end ()) |
|
|
170 | clients.erase (i); |
|
|
171 | |
|
|
172 | sfree<uint8> (faces_sent, nrofpixmaps); |
|
|
173 | free (stats.range); |
|
|
174 | free (stats.title); |
|
|
175 | free (host); |
|
|
176 | } |
|
|
177 | |
|
|
178 | void |
|
|
179 | client::do_destroy () |
|
|
180 | { |
|
|
181 | attachable::do_destroy (); |
|
|
182 | |
|
|
183 | if (pl) |
|
|
184 | pl->disconnect (); |
|
|
185 | |
|
|
186 | if (fd >= 0) |
|
|
187 | close (fd); |
|
|
188 | |
|
|
189 | state = ST_DEAD; |
|
|
190 | |
|
|
191 | socket_ev.suspend (); |
|
|
192 | cmd_ev.suspend (); |
|
|
193 | |
|
|
194 | // socket now longer references us |
|
|
195 | refcnt_dec (); |
|
|
196 | } |
157 | |
197 | |
158 | /** This sets up the socket and reads all the image information into memory. */ |
198 | /** This sets up the socket and reads all the image information into memory. */ |
159 | void |
199 | void |
160 | init_ericserver (void) |
200 | init_ericserver (void) |
161 | { |
201 | { |
162 | struct sockaddr_in insock; |
|
|
163 | struct protoent *protox; |
|
|
164 | struct linger linger_opt; |
|
|
165 | |
|
|
166 | socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX); |
|
|
167 | |
|
|
168 | socket_info.timeout.tv_sec = 0; |
|
|
169 | socket_info.timeout.tv_usec = 0; |
|
|
170 | socket_info.nconns = 0; |
|
|
171 | |
|
|
172 | #ifdef CS_LOGSTATS |
|
|
173 | memset (&cst_tot, 0, sizeof (CS_Stats)); |
|
|
174 | memset (&cst_lst, 0, sizeof (CS_Stats)); |
|
|
175 | cst_tot.time_start = time (NULL); |
202 | cst_tot.time_start = time (NULL); |
176 | cst_lst.time_start = time (NULL); |
203 | cst_lst.time_start = time (NULL); |
177 | #endif |
|
|
178 | |
204 | |
179 | LOG (llevDebug, "Initialize new client/server data\n"); |
205 | LOG (llevDebug, "Initialize new client/server data\n"); |
180 | socket_info.nconns = 1; |
|
|
181 | init_sockets = (NewSocket *) malloc (sizeof (NewSocket)); |
|
|
182 | init_sockets[0].faces_sent = NULL; /* unused */ |
|
|
183 | socket_info.allocated_sockets = 1; |
|
|
184 | |
206 | |
185 | protox = getprotobyname ("tcp"); |
|
|
186 | if (protox == NULL) |
|
|
187 | { |
|
|
188 | LOG (llevError, "init_ericserver: Error getting protox\n"); |
|
|
189 | return; |
|
|
190 | } |
|
|
191 | |
|
|
192 | init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto); |
|
|
193 | if (init_sockets[0].fd == -1) |
|
|
194 | { |
|
|
195 | LOG (llevError, "Cannot create socket: %s\n", strerror (errno)); |
|
|
196 | exit (-1); |
|
|
197 | } |
|
|
198 | |
|
|
199 | insock.sin_family = AF_INET; |
|
|
200 | insock.sin_port = htons (settings.csport); |
|
|
201 | insock.sin_addr.s_addr = htonl (INADDR_ANY); |
|
|
202 | |
|
|
203 | linger_opt.l_onoff = 0; |
|
|
204 | linger_opt.l_linger = 0; |
|
|
205 | if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_LINGER, (char *) &linger_opt, sizeof (struct linger))) |
|
|
206 | LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno)); |
|
|
207 | |
|
|
208 | { |
|
|
209 | int tmp = 1; |
|
|
210 | |
|
|
211 | if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof (tmp))) |
|
|
212 | LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno)); |
|
|
213 | } |
|
|
214 | |
|
|
215 | if (bind (init_sockets[0].fd, (struct sockaddr *) &insock, sizeof (insock)) == (-1)) |
|
|
216 | { |
|
|
217 | LOG (llevError, "Cannot bind socket to port %d: %s\n", ntohs (insock.sin_port), strerror (errno)); |
|
|
218 | close (init_sockets[0].fd); |
|
|
219 | exit (-1); |
|
|
220 | } |
|
|
221 | |
|
|
222 | if (listen (init_sockets[0].fd, 5) == (-1)) |
|
|
223 | { |
|
|
224 | LOG (llevError, "Cannot listen on socket: %s\n", strerror (errno)); |
|
|
225 | close (init_sockets[0].fd); |
|
|
226 | exit (-1); |
|
|
227 | } |
|
|
228 | |
|
|
229 | init_sockets[0].status = Ns_Add; |
|
|
230 | read_client_images (); |
207 | read_client_images (); |
231 | } |
208 | } |
232 | |
209 | |
233 | |
210 | |
234 | /******************************************************************************* |
211 | /******************************************************************************* |
… | |
… | |
241 | void |
218 | void |
242 | free_all_newserver (void) |
219 | free_all_newserver (void) |
243 | { |
220 | { |
244 | LOG (llevDebug, "Freeing all new client/server information.\n"); |
221 | LOG (llevDebug, "Freeing all new client/server information.\n"); |
245 | free_socket_images (); |
222 | free_socket_images (); |
246 | free (init_sockets); |
|
|
247 | } |
223 | } |
248 | |
224 | |
249 | /** |
225 | client * |
250 | * Frees a socket. |
226 | client::create (int fd, const char *peername) |
251 | * Basically, all we need to do here is free all data structures that |
|
|
252 | * might be associated with the socket. It is up to the caller to |
|
|
253 | * update the list |
|
|
254 | */ |
|
|
255 | |
|
|
256 | void |
|
|
257 | free_newsocket (NewSocket *ns) |
|
|
258 | { |
227 | { |
259 | close (ns->fd); |
228 | if (checkbanned (NULL, peername)) |
|
|
229 | { |
|
|
230 | LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername); |
|
|
231 | return 0; |
|
|
232 | } |
|
|
233 | else |
|
|
234 | { |
|
|
235 | client *ns = new client (dup (fd), peername); |
260 | |
236 | |
261 | if (ns->stats.range) |
237 | ns->instantiate (); // effectively a nop right now |
262 | free (ns->stats.range); |
|
|
263 | |
238 | |
264 | if (ns->stats.title) |
239 | INVOKE_CLIENT (CONNECT, ns); |
265 | free (ns->stats.title); |
|
|
266 | |
240 | |
267 | free (ns->host); |
241 | return ns; |
268 | free (ns->inbuf.buf); |
242 | } |
269 | } |
243 | } |
270 | |
244 | |
271 | /** Sends the 'goodbye' command to the player, and closes connection. */ |
|
|
272 | void |
|
|
273 | final_free_player (player *pl) |
|
|
274 | { |
|
|
275 | cs_write_string (&pl->socket, "goodbye", 8); |
|
|
276 | free_newsocket (&pl->socket); |
|
|
277 | free_player (pl); |
|
|
278 | } |
|
|