1 | /* |
1 | /* |
2 | CrossFire, A Multiplayer game for X-windows |
2 | * This file is part of Crossfire TRT, the Multiplayer Online Role Playing Game. |
3 | |
3 | * |
|
|
4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team |
4 | Copyright (C) 2001 Mark Wedel |
5 | * Copyright (©) 2001,2007 Mark Wedel |
5 | Copyright (C) 1992 Frank Tore Johansen |
6 | * Copyright (©) 1992,2007 Frank Tore Johansen |
6 | |
7 | * |
7 | This program is free software; you can redistribute it and/or modify |
8 | * Crossfire TRT is free software; you can redistribute it and/or modify it |
8 | it under the terms of the GNU General Public License as published by |
9 | * under the terms of the GNU General Public License as published by the Free |
9 | the Free Software Foundation; either version 2 of the License, or |
10 | * Software Foundation; either version 2 of the License, or (at your option) |
10 | (at your option) any later version. |
11 | * any later version. |
11 | |
12 | * |
12 | This program is distributed in the hope that it will be useful, |
13 | * This program is distributed in the hope that it will be useful, but |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
15 | GNU General Public License for more details. |
16 | * for more details. |
16 | |
17 | * |
17 | You should have received a copy of the GNU General Public License |
18 | * You should have received a copy of the GNU General Public License along |
18 | along with this program; if not, write to the Free Software |
19 | * with Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51 |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
20 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
20 | |
21 | * |
21 | The author can be reached via e-mail to <crossfire@schmorp.de> |
22 | * The authors can be reached via e-mail to <crossfire@schmorp.de> |
22 | */ |
23 | */ |
23 | |
24 | |
24 | /** |
25 | /** |
25 | * \file |
26 | * \file |
26 | * Socket general functions |
27 | * Socket general functions |
27 | * |
28 | * |
… | |
… | |
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 | client_socket *init_sockets; |
|
|
55 | |
50 | |
56 | client_socket::client_socket () |
51 | sockvec clients; |
57 | { |
|
|
58 | } |
|
|
59 | |
|
|
60 | client_socket::~client_socket () |
|
|
61 | { |
|
|
62 | } |
|
|
63 | |
52 | |
64 | /** |
53 | /** |
65 | * Initializes a connection. Really, it just sets up the data structure, |
54 | * Initializes a connection. Really, it just sets up the data structure, |
66 | * 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 |
67 | * client. |
56 | * client. |
68 | */ |
57 | */ |
69 | void |
58 | client::client (int fd, const char *peername) |
70 | client_socket::init (const char *from_ip) |
59 | : fd (fd), host (strdup (peername)), |
|
|
60 | socket_ev (this, &client::socket_cb), |
|
|
61 | cmd_ev (this, &client::cmd_cb) |
71 | { |
62 | { |
|
|
63 | refcnt_inc (); // the socket is an external reference |
|
|
64 | |
|
|
65 | mss = 1500 - 52; // 1500 typical ethernet frame, 66 typical tcp header overhead |
|
|
66 | |
|
|
67 | { |
|
|
68 | struct linger linger_opt; |
|
|
69 | |
|
|
70 | linger_opt.l_onoff = 0; |
|
|
71 | linger_opt.l_linger = 0; |
|
|
72 | |
|
|
73 | if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger))) |
|
|
74 | LOG (llevError, "SO_LINGER: %s\n", strerror (errno)); |
|
|
75 | } |
|
|
76 | |
|
|
77 | { |
|
|
78 | int val; |
|
|
79 | |
|
|
80 | #ifdef IP_TOS |
|
|
81 | val = IPTOS_LOWDELAY; |
|
|
82 | if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val))) |
|
|
83 | LOG (llevError, "IP_TOS: %s\n", strerror (errno)); |
|
|
84 | #endif |
|
|
85 | |
|
|
86 | #ifdef TCP_NODELAY |
|
|
87 | val = 1; |
|
|
88 | if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val))) |
|
|
89 | LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno)); |
|
|
90 | #endif |
|
|
91 | |
|
|
92 | // set some very aggressive keepalive parameters |
|
|
93 | #ifdef TCP_KEEPIDLE |
|
|
94 | val = 1; |
|
|
95 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val))) |
|
|
96 | LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno)); |
|
|
97 | #endif |
|
|
98 | |
|
|
99 | #ifdef TCP_KEEPCNT |
|
|
100 | val = 3; |
|
|
101 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val))) |
|
|
102 | LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno)); |
|
|
103 | #endif |
|
|
104 | |
|
|
105 | #ifdef TCP_KEEPINTVL |
|
|
106 | val = 1; |
|
|
107 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val))) |
|
|
108 | LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno)); |
|
|
109 | #endif |
|
|
110 | |
|
|
111 | // try to find the mss value in use |
|
|
112 | #ifdef TCP_MAXSEG |
|
|
113 | socklen_t sl = sizeof (val); |
|
|
114 | if (!getsockopt (fd, IPPROTO_TCP, TCP_MAXSEG, &val, &sl) && sl == sizeof (val)) |
|
|
115 | mss = val; |
|
|
116 | #endif |
|
|
117 | } |
|
|
118 | |
|
|
119 | { |
72 | int bufsize = 65535; /*Supposed absolute upper limit */ |
120 | int bufsize = 65535; /*Supposed absolute upper limit */ |
73 | int oldbufsize; |
121 | int oldbufsize; |
74 | int buflen = sizeof (int); |
122 | int buflen = sizeof (int); |
75 | |
123 | |
76 | if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1) |
124 | if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1) |
77 | LOG (llevError, "InitConnection: Error on fcntl.\n"); |
125 | LOG (llevError, "InitConnection: Error on fcntl.\n"); |
78 | |
126 | |
79 | if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) |
127 | if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) |
80 | oldbufsize = 0; |
128 | oldbufsize = 0; |
81 | |
129 | |
82 | if (oldbufsize < bufsize) |
130 | if (oldbufsize < bufsize) |
83 | if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) |
131 | if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) |
84 | LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); |
132 | LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); |
85 | |
133 | |
86 | buflen = sizeof (oldbufsize); |
134 | buflen = sizeof (oldbufsize); |
87 | getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
135 | getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
88 | #ifdef ESRV_DEBUG |
136 | } |
89 | LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize); |
|
|
90 | #endif |
|
|
91 | |
137 | |
92 | faceset = 0; |
138 | state = ST_SETUP; |
93 | facecache = 0; |
|
|
94 | image2 = 0; |
|
|
95 | sound = 0; |
|
|
96 | exp64 = 0; |
|
|
97 | monitor_spells = 0; |
|
|
98 | mapmode = Map0Cmd; |
139 | mapmode = Map0Cmd; |
99 | darkness = 1; |
140 | darkness = 1; |
100 | status = Ns_Add; |
|
|
101 | mapx = 11; |
141 | mapx = 11; |
102 | mapy = 11; |
142 | mapy = 11; |
103 | newmapcmd = 0; |
|
|
104 | itemcmd = 1; /* Default is version item1 command */ |
143 | itemcmd = 1; /* Default is version item1 command */ |
105 | ext_mapinfos = 0; /*extendedmapinfo datas */ |
144 | max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default |
106 | EMI_smooth = 0; |
|
|
107 | look_position = 0; |
|
|
108 | update_look = 0; |
|
|
109 | has_readable_type = 0; |
|
|
110 | supported_readables = 0; |
|
|
111 | monitor_spells = 0; |
|
|
112 | mapinfocmd = 0; |
|
|
113 | extcmd = 0; |
|
|
114 | extmap = 0; |
|
|
115 | |
145 | |
116 | /* we should really do some checking here - if total clients overflows |
|
|
117 | * we need to do something more intelligent, because client id's will start |
|
|
118 | * duplicating (not likely in normal cases, but malicous attacks that |
|
|
119 | * just open and close connections could get this total up. |
|
|
120 | */ |
|
|
121 | inbuf_len = 0; |
|
|
122 | |
|
|
123 | /* Basic initialization. Needed because we do a check in |
|
|
124 | * HandleClient for oldsocketmode without checking the |
|
|
125 | * length of data. |
|
|
126 | */ |
|
|
127 | memset (&lastmap, 0, sizeof (struct Map)); |
|
|
128 | memset (faces_sent, 0, faces_sent_len * sizeof (*faces_sent)); |
|
|
129 | memset (&anims_sent, 0, sizeof (anims_sent)); |
|
|
130 | memset (&stats, 0, sizeof (struct statsinfo)); |
|
|
131 | /* Do this so we don't send a face command for the client for |
146 | /* Do this so we don't send a face command for the client for |
132 | * this face. Face 0 is sent to the client to say clear |
147 | * this face. Face 0 is sent to the client to say clear |
133 | * face information. |
148 | * face information. |
134 | */ |
149 | */ |
135 | faces_sent[0] = NS_FACESENT_FACE; |
150 | faces_sent[0] = true; |
136 | |
151 | |
137 | outputbuffer.start = 0; |
152 | socket_ev.prio (PE_PRIO_NORMAL); |
138 | outputbuffer.len = 0; |
153 | socket_ev.fd (fd); |
139 | can_write = 1; |
154 | socket_ev.poll (PE_R); |
140 | password_fails = 0; |
|
|
141 | |
155 | |
142 | current_map = 0; |
156 | cmd_ev.prio (PE_PRIO_NORMAL); |
143 | current_x = 0; |
|
|
144 | current_y = 0; |
|
|
145 | client[0] = 0; |
|
|
146 | buggy_mapscroll = 0; |
|
|
147 | |
157 | |
148 | sent_scroll = 0; |
158 | // initialisation done, kick it! |
149 | host = strdup_local (from_ip); |
|
|
150 | |
|
|
151 | { |
|
|
152 | packet sl; |
|
|
153 | sl.printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); |
159 | send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); |
154 | send_packet (sl); |
160 | flush (); |
155 | } |
|
|
156 | |
161 | |
157 | if (socket_info.nconns > cst_tot.max_conn) |
162 | reset_stats (); |
158 | cst_tot.max_conn = socket_info.nconns; |
|
|
159 | if (socket_info.nconns > cst_lst.max_conn) |
|
|
160 | cst_lst.max_conn = socket_info.nconns; |
|
|
161 | } |
|
|
162 | |
163 | |
|
|
164 | clients.insert (this); |
|
|
165 | } |
163 | |
166 | |
164 | /** This sets up the socket and reads all the image information into memory. */ |
167 | client::~client () |
|
|
168 | { |
|
|
169 | clients.erase (this); |
|
|
170 | |
|
|
171 | free (stats.range); |
|
|
172 | free (stats.title); |
|
|
173 | free (host); |
|
|
174 | } |
|
|
175 | |
165 | void |
176 | void |
166 | init_ericserver (void) |
177 | client::do_destroy () |
167 | { |
178 | { |
168 | struct sockaddr_in insock; |
179 | attachable::do_destroy (); |
169 | struct protoent *protox; |
|
|
170 | struct linger linger_opt; |
|
|
171 | |
180 | |
172 | socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX); |
181 | if (pl) |
|
|
182 | pl->disconnect (); |
173 | |
183 | |
174 | socket_info.timeout.tv_sec = 0; |
184 | if (fd >= 0) |
175 | socket_info.timeout.tv_usec = 0; |
|
|
176 | socket_info.nconns = 0; |
|
|
177 | |
|
|
178 | memset (&cst_tot, 0, sizeof (CS_Stats)); |
|
|
179 | memset (&cst_lst, 0, sizeof (CS_Stats)); |
|
|
180 | cst_tot.time_start = time (NULL); |
|
|
181 | cst_lst.time_start = time (NULL); |
|
|
182 | |
|
|
183 | LOG (llevDebug, "Initialize new client/server data\n"); |
|
|
184 | socket_info.nconns = 1; |
|
|
185 | init_sockets = (client_socket *) malloc (sizeof (client_socket)); |
|
|
186 | init_sockets[0].faces_sent = NULL; /* unused */ |
|
|
187 | socket_info.allocated_sockets = 1; |
|
|
188 | |
|
|
189 | protox = getprotobyname ("tcp"); |
|
|
190 | if (protox == NULL) |
|
|
191 | { |
185 | { |
192 | LOG (llevError, "init_ericserver: Error getting protox\n"); |
186 | send_packet ("goodbye"); |
193 | return; |
187 | flush (); |
|
|
188 | |
|
|
189 | close (fd); |
194 | } |
190 | } |
195 | |
191 | |
196 | init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto); |
192 | state = ST_DEAD; |
197 | if (init_sockets[0].fd == -1) |
|
|
198 | { |
|
|
199 | LOG (llevError, "Cannot create socket: %s\n", strerror (errno)); |
|
|
200 | exit (-1); |
|
|
201 | } |
|
|
202 | |
193 | |
203 | insock.sin_family = AF_INET; |
194 | socket_ev.suspend (); |
204 | insock.sin_port = htons (settings.csport); |
195 | cmd_ev.suspend (); |
205 | insock.sin_addr.s_addr = htonl (INADDR_ANY); |
|
|
206 | |
196 | |
207 | linger_opt.l_onoff = 0; |
197 | refcnt_dec (); // socket no longer open |
208 | linger_opt.l_linger = 0; |
|
|
209 | if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_LINGER, (char *) &linger_opt, sizeof (struct linger))) |
|
|
210 | LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno)); |
|
|
211 | |
|
|
212 | { |
|
|
213 | int tmp = 1; |
|
|
214 | |
|
|
215 | if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof (tmp))) |
|
|
216 | LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno)); |
|
|
217 | } |
|
|
218 | |
|
|
219 | if (bind (init_sockets[0].fd, (struct sockaddr *) &insock, sizeof (insock)) == (-1)) |
|
|
220 | { |
|
|
221 | LOG (llevError, "Cannot bind socket to port %d: %s\n", ntohs (insock.sin_port), strerror (errno)); |
|
|
222 | close (init_sockets[0].fd); |
|
|
223 | exit (-1); |
|
|
224 | } |
|
|
225 | |
|
|
226 | if (listen (init_sockets[0].fd, 5) == (-1)) |
|
|
227 | { |
|
|
228 | LOG (llevError, "Cannot listen on socket: %s\n", strerror (errno)); |
|
|
229 | close (init_sockets[0].fd); |
|
|
230 | exit (-1); |
|
|
231 | } |
|
|
232 | |
|
|
233 | init_sockets[0].status = Ns_Add; |
|
|
234 | read_client_images (); |
|
|
235 | } |
198 | } |
236 | |
199 | |
|
|
200 | void |
|
|
201 | client::reset_stats () |
|
|
202 | { |
|
|
203 | /* we need to clear these to -1 and not zero - otherwise, |
|
|
204 | * if a player quits and starts a new character, we wont |
|
|
205 | * send new values to the client, as things like exp start |
|
|
206 | * at zero. |
|
|
207 | */ |
|
|
208 | for (int i = 0; i < NUM_SKILLS; i++) |
|
|
209 | last_skill_exp[i] = -1; |
|
|
210 | |
|
|
211 | for (int i = 0; i < NROFATTACKS; i++) |
|
|
212 | last_resist[i] = -1; |
|
|
213 | |
|
|
214 | last_weapon_sp = -1; |
|
|
215 | last_level = -1; |
|
|
216 | last_stats.exp = -1; |
|
|
217 | last_weight = (uint32) - 1; |
|
|
218 | last_flags = 0; |
|
|
219 | last_weight = 0; |
|
|
220 | last_weight_limit = 0; |
|
|
221 | last_path_attuned = 0; |
|
|
222 | last_path_repelled = 0; |
|
|
223 | last_path_denied = 0; |
|
|
224 | last_speed = 0; |
|
|
225 | last_flags = 0; |
|
|
226 | |
|
|
227 | static living zero_living; |
|
|
228 | last_stats = zero_living; |
|
|
229 | } |
237 | |
230 | |
238 | /******************************************************************************* |
231 | /******************************************************************************* |
239 | * |
232 | * |
240 | * Start of functions dealing with freeing of the data. |
233 | * Start of functions dealing with freeing of the data. |
241 | * |
234 | * |
… | |
… | |
245 | void |
238 | void |
246 | free_all_newserver (void) |
239 | free_all_newserver (void) |
247 | { |
240 | { |
248 | LOG (llevDebug, "Freeing all new client/server information.\n"); |
241 | LOG (llevDebug, "Freeing all new client/server information.\n"); |
249 | free_socket_images (); |
242 | free_socket_images (); |
250 | free (init_sockets); |
|
|
251 | } |
243 | } |
252 | |
244 | |
253 | /** |
245 | client * |
254 | * Frees a socket. |
246 | client::create (int fd, const char *peername) |
255 | * Basically, all we need to do here is free all data structures that |
|
|
256 | * might be associated with the socket. It is up to the caller to |
|
|
257 | * update the list |
|
|
258 | */ |
|
|
259 | |
|
|
260 | void |
|
|
261 | free_newsocket (client_socket *ns) |
|
|
262 | { |
247 | { |
263 | close (ns->fd); |
248 | client *ns = new client (dup (fd), peername); |
264 | |
249 | ns->instantiate (); // effectively a nop right now |
265 | if (ns->stats.range) |
250 | INVOKE_CLIENT (CONNECT, ns); |
266 | free (ns->stats.range); |
251 | return ns; |
267 | |
|
|
268 | if (ns->stats.title) |
|
|
269 | free (ns->stats.title); |
|
|
270 | |
|
|
271 | free (ns->host); |
|
|
272 | } |
252 | } |
273 | |
253 | |
274 | /** Sends the 'goodbye' command to the player, and closes connection. */ |
|
|
275 | void |
|
|
276 | final_free_player (player *pl) |
|
|
277 | { |
|
|
278 | pl->socket.send_packet ("goodbye"); |
|
|
279 | free_newsocket (&pl->socket); |
|
|
280 | free_player (pl); |
|
|
281 | } |
|
|
282 | |
|
|