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Comparing deliantra/server/socket/init.C (file contents):
Revision 1.14 by root, Thu Dec 14 01:21:58 2006 UTC vs.
Revision 1.35 by root, Mon Jan 8 18:18:36 2007 UTC

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
53Socket_Info socket_info; 49#include <algorithm>
54NewSocket *init_sockets; 50
51sockvec 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 */
61void 58client::client (int fd, const char *peername)
62InitConnection (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 int bufsize = 65535; /*Supposed absolute upper limit */ 64 refcnt_inc (); // the socket is an external reference
65 int oldbufsize;
66 int buflen = sizeof (int);
67 65
68 if (fcntl (ns->fd, F_SETFL, O_NONBLOCK) == -1) 66 {
69 LOG (llevError, "InitConnection: Error on fcntl.\n"); 67 struct linger linger_opt;
70 68
71 if (getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) 69 linger_opt.l_onoff = 0;
72 oldbufsize = 0; 70 linger_opt.l_linger = 0;
73 71
74 if (oldbufsize < bufsize) 72 if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
75 if (setsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) 73 LOG (llevError, "SO_LINGER: %s\n", strerror (errno));
76 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); 74 }
77 75
78 buflen = sizeof (oldbufsize); 76 {
79 getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); 77 int val = IPTOS_LOWDELAY;
80#ifdef ESRV_DEBUG 78
81 LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize); 79 if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val)))
80 LOG (llevError, "IP_TOS: %s\n", strerror (errno));
81 }
82
83 {
84 int val = 1;
85
86 if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val)))
87 LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno));
88 }
89
90#ifdef __linux__
91 {
92 int val;
93
94 // set some very aggressive keepalive parameters
95 val = 10;
96 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val)))
97 LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno));
98
99 val = 5;
100 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val)))
101 LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno));
102
103 val = 1;
104 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val)))
105 LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno));
106 }
82#endif 107#endif
83 108
84 ns->faceset = 0; 109 {
85 ns->facecache = 0; 110 int bufsize = 65535; /*Supposed absolute upper limit */
86 ns->image2 = 0; 111 int oldbufsize;
87 ns->sound = 0; 112 int buflen = sizeof (int);
88 ns->exp64 = 0; 113
89 ns->monitor_spells = 0; 114 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
115 LOG (llevError, "InitConnection: Error on fcntl.\n");
116
117 if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1)
118 oldbufsize = 0;
119
120 if (oldbufsize < bufsize)
121 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize)))
122 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
123
124 buflen = sizeof (oldbufsize);
125 getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen);
126 }
127
128 state = ST_SETUP;
90 ns->mapmode = Map0Cmd; 129 mapmode = Map0Cmd;
91 ns->darkness = 1; 130 darkness = 1;
92 ns->status = Ns_Add;
93 ns->mapx = 11; 131 mapx = 11;
94 ns->mapy = 11; 132 mapy = 11;
95 ns->newmapcmd = 0;
96 ns->itemcmd = 1; /* Default is version item1 command */ 133 itemcmd = 1; /* Default is version item1 command */
97 ns->ext_mapinfos = 0; /*extendedmapinfo datas */
98 ns->EMI_smooth = 0;
99 ns->look_position = 0;
100 ns->update_look = 0;
101 ns->has_readable_type = 0;
102 ns->supported_readables = 0;
103 ns->monitor_spells = 0;
104 ns->mapinfocmd = 0;
105 ns->extcmd = 0;
106 ns->extmap = 0;
107 134
108 /* we should really do some checking here - if total clients overflows 135 faces_sent = salloc0<uint8> (nrofpixmaps);
109 * we need to do something more intelligent, because client id's will start
110 * duplicating (not likely in normal cases, but malicous attacks that
111 * just open and close connections could get this total up.
112 */
113 ns->inbuf_len = 0;
114 136
115 /* Basic initialization. Needed because we do a check in
116 * HandleClient for oldsocketmode without checking the
117 * length of data.
118 */
119 memset (&ns->lastmap, 0, sizeof (struct Map));
120 memset (ns->faces_sent, 0, ns->faces_sent_len * sizeof (*ns->faces_sent));
121 memset (&ns->anims_sent, 0, sizeof (ns->anims_sent));
122 memset (&ns->stats, 0, sizeof (struct statsinfo));
123 /* Do this so we don't send a face command for the client for 137 /* Do this so we don't send a face command for the client for
124 * this face. Face 0 is sent to the client to say clear 138 * this face. Face 0 is sent to the client to say clear
125 * face information. 139 * face information.
126 */ 140 */
127 ns->faces_sent[0] = NS_FACESENT_FACE; 141 faces_sent[0] = NS_FACESENT_FACE;
128 142
129 ns->outputbuffer.start = 0; 143 // socket I/O is low priority
130 ns->outputbuffer.len = 0; 144 // we prefer to have the server run instead of handling client requests
131 ns->can_write = 1; 145 socket_ev.prio (PE_PRIO_NORMAL + 1);
132 ns->password_fails = 0; 146 socket_ev.fd (fd);
147 socket_ev.poll (PE_R);
133 148
134 ns->current_map = 0; 149 // command handling is even lower priority
135 ns->current_x = 0; 150 // that way no client can monopolise the server
136 ns->current_y = 0; 151 cmd_ev.prio (PE_PRIO_NORMAL + 2);
137 ns->client[0] = 0;
138 ns->buggy_mapscroll = 0;
139 152
140 ns->sent_scroll = 0; 153 // initialisation done, kick it!
141 ns->host = strdup_local (from_ip);
142
143 {
144 packet sl;
145
146 sl.printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); 154 send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
147 Send_With_Handling (ns, &sl); 155 flush ();
156
157 reset_stats ();
158
159 clients.insert (this);
160}
161
162client::~client ()
163{
164 clients.erase (this);
165
166 sfree<uint8> (faces_sent, nrofpixmaps);
167 free (stats.range);
168 free (stats.title);
169 free (host);
170}
171
172void
173client::do_destroy ()
174{
175 attachable::do_destroy ();
176
177 if (pl)
178 pl->disconnect ();
179
180 if (fd >= 0)
181 {
182 send_packet ("goodbye");
183 flush ();
184
185 close (fd);
148 } 186 }
149 187
150#ifdef CS_LOGSTATS 188 state = ST_DEAD;
151 if (socket_info.nconns > cst_tot.max_conn)
152 cst_tot.max_conn = socket_info.nconns;
153 if (socket_info.nconns > cst_lst.max_conn)
154 cst_lst.max_conn = socket_info.nconns;
155#endif
156}
157 189
190 socket_ev.suspend ();
191 cmd_ev.suspend ();
192
193 refcnt_dec (); // socket no longer open
194}
195
196void
197client::reset_stats ()
198{
199 /* we need to clear these to -1 and not zero - otherwise,
200 * if a player quits and starts a new character, we wont
201 * send new values to the client, as things like exp start
202 * at zero.
203 */
204 for (int i = 0; i < NUM_SKILLS; i++)
205 last_skill_exp[i] = -1;
206
207 for (int i = 0; i < NROFATTACKS; i++)
208 last_resist[i] = -1;
209
210 last_weapon_sp = -1;
211 last_level = -1;
212 last_stats.exp = -1;
213 last_weight = (uint32) - 1;
214 last_flags = 0;
215 last_weight = 0;
216 last_weight_limit = 0;
217 last_path_attuned = 0;
218 last_path_repelled = 0;
219 last_path_denied = 0;
220 last_speed = 0;
221 flags = 0;
222
223 static living zero_living;
224 last_stats = zero_living;
225}
158 226
159/** This sets up the socket and reads all the image information into memory. */ 227/** This sets up the socket and reads all the image information into memory. */
160void 228void
161init_ericserver (void) 229init_ericserver (void)
162{ 230{
163 struct sockaddr_in insock;
164 struct protoent *protox;
165 struct linger linger_opt;
166
167 socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX);
168
169 socket_info.timeout.tv_sec = 0;
170 socket_info.timeout.tv_usec = 0;
171 socket_info.nconns = 0;
172
173#ifdef CS_LOGSTATS
174 memset (&cst_tot, 0, sizeof (CS_Stats));
175 memset (&cst_lst, 0, sizeof (CS_Stats));
176 cst_tot.time_start = time (NULL); 231 cst_tot.time_start = time (NULL);
177 cst_lst.time_start = time (NULL); 232 cst_lst.time_start = time (NULL);
178#endif
179 233
180 LOG (llevDebug, "Initialize new client/server data\n"); 234 LOG (llevDebug, "Initialize new client/server data\n");
181 socket_info.nconns = 1;
182 init_sockets = (NewSocket *) malloc (sizeof (NewSocket));
183 init_sockets[0].faces_sent = NULL; /* unused */
184 socket_info.allocated_sockets = 1;
185 235
186 protox = getprotobyname ("tcp");
187 if (protox == NULL)
188 {
189 LOG (llevError, "init_ericserver: Error getting protox\n");
190 return;
191 }
192
193 init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto);
194 if (init_sockets[0].fd == -1)
195 {
196 LOG (llevError, "Cannot create socket: %s\n", strerror (errno));
197 exit (-1);
198 }
199
200 insock.sin_family = AF_INET;
201 insock.sin_port = htons (settings.csport);
202 insock.sin_addr.s_addr = htonl (INADDR_ANY);
203
204 linger_opt.l_onoff = 0;
205 linger_opt.l_linger = 0;
206 if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_LINGER, (char *) &linger_opt, sizeof (struct linger)))
207 LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno));
208
209 {
210 int tmp = 1;
211
212 if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof (tmp)))
213 LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno));
214 }
215
216 if (bind (init_sockets[0].fd, (struct sockaddr *) &insock, sizeof (insock)) == (-1))
217 {
218 LOG (llevError, "Cannot bind socket to port %d: %s\n", ntohs (insock.sin_port), strerror (errno));
219 close (init_sockets[0].fd);
220 exit (-1);
221 }
222
223 if (listen (init_sockets[0].fd, 5) == (-1))
224 {
225 LOG (llevError, "Cannot listen on socket: %s\n", strerror (errno));
226 close (init_sockets[0].fd);
227 exit (-1);
228 }
229
230 init_sockets[0].status = Ns_Add;
231 read_client_images (); 236 read_client_images ();
232} 237}
233 238
234 239
235/******************************************************************************* 240/*******************************************************************************
… …
242void 247void
243free_all_newserver (void) 248free_all_newserver (void)
244{ 249{
245 LOG (llevDebug, "Freeing all new client/server information.\n"); 250 LOG (llevDebug, "Freeing all new client/server information.\n");
246 free_socket_images (); 251 free_socket_images ();
247 free (init_sockets);
248} 252}
249 253
250/** 254client *
251 * Frees a socket. 255client::create (int fd, const char *peername)
252 * Basically, all we need to do here is free all data structures that
253 * might be associated with the socket. It is up to the caller to
254 * update the list
255 */
256
257void
258free_newsocket (NewSocket *ns)
259{ 256{
260 close (ns->fd); 257 if (checkbanned (NULL, peername))
258 {
259 LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername);
260 return 0;
261 }
262 else
263 {
264 client *ns = new client (dup (fd), peername);
261 265
262 if (ns->stats.range) 266 ns->instantiate (); // effectively a nop right now
263 free (ns->stats.range);
264 267
265 if (ns->stats.title) 268 INVOKE_CLIENT (CONNECT, ns);
266 free (ns->stats.title);
267 269
268 free (ns->host); 270 return ns;
271 }
269} 272}
270 273
271/** Sends the 'goodbye' command to the player, and closes connection. */
272void
273final_free_player (player *pl)
274{
275 pl->socket.send_packet ("goodbye");
276 free_newsocket (&pl->socket);
277 free_player (pl);
278}
279

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