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Comparing deliantra/server/socket/init.C (file contents):
Revision 1.12 by root, Thu Dec 14 00:01:35 2006 UTC vs.
Revision 1.33 by pippijn, Sat Jan 6 14:42:31 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 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
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;
116 134
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->lastmap, 0, sizeof (struct Map));
122 memset (ns->faces_sent, 0, ns->faces_sent_len * sizeof (*ns->faces_sent));
123 memset (&ns->anims_sent, 0, sizeof (ns->anims_sent));
124 memset (&ns->stats, 0, sizeof (struct statsinfo));
125 /* 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
126 * 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
127 * face information. 137 * face information.
128 */ 138 */
129 ns->faces_sent[0] = NS_FACESENT_FACE; 139 faces_sent[0] = NS_FACESENT_FACE;
130 140
131 ns->outputbuffer.start = 0; 141 // socket I/O is low priority
132 ns->outputbuffer.len = 0; 142 // we prefer to have the server run instead of handling client requests
133 ns->can_write = 1; 143 socket_ev.prio (PE_PRIO_NORMAL + 1);
134 ns->password_fails = 0; 144 socket_ev.fd (fd);
145 socket_ev.poll (PE_R);
135 146
136 ns->current_map = 0; 147 // command handling is even lower priority
137 ns->current_x = 0; 148 // that way no client can monopolise the server
138 ns->current_y = 0; 149 cmd_ev.prio (PE_PRIO_NORMAL + 2);
139 ns->client[0] = 0;
140 ns->buggy_mapscroll = 0;
141 150
142 ns->sent_scroll = 0; 151 // initialisation done, kick it!
143 ns->host = strdup_local (from_ip);
144 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);
145 sl.buf = (unsigned char *) buf; 153 flush ();
146 sl.len = strlen ((char *) buf); 154
147 Send_With_Handling (ns, &sl); 155 // clients are externally referenced by the socket
148#ifdef CS_LOGSTATS 156 refcnt_inc ();
149 if (socket_info.nconns > cst_tot.max_conn) 157 clients.push_back (this);
150 cst_tot.max_conn = socket_info.nconns; 158
151 if (socket_info.nconns > cst_lst.max_conn) 159#if 0//TODO
152 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;
153#endif 163#endif
154} 164}
155 165
166client::~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
178void
179client::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}
156 197
157/** 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. */
158void 199void
159init_ericserver (void) 200init_ericserver (void)
160{ 201{
161 struct sockaddr_in insock;
162 struct protoent *protox;
163 struct linger linger_opt;
164
165 socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX);
166
167 socket_info.timeout.tv_sec = 0;
168 socket_info.timeout.tv_usec = 0;
169 socket_info.nconns = 0;
170
171#ifdef CS_LOGSTATS
172 memset (&cst_tot, 0, sizeof (CS_Stats));
173 memset (&cst_lst, 0, sizeof (CS_Stats));
174 cst_tot.time_start = time (NULL); 202 cst_tot.time_start = time (NULL);
175 cst_lst.time_start = time (NULL); 203 cst_lst.time_start = time (NULL);
176#endif
177 204
178 LOG (llevDebug, "Initialize new client/server data\n"); 205 LOG (llevDebug, "Initialize new client/server data\n");
179 socket_info.nconns = 1;
180 init_sockets = (NewSocket *) malloc (sizeof (NewSocket));
181 init_sockets[0].faces_sent = NULL; /* unused */
182 socket_info.allocated_sockets = 1;
183 206
184 protox = getprotobyname ("tcp");
185 if (protox == NULL)
186 {
187 LOG (llevError, "init_ericserver: Error getting protox\n");
188 return;
189 }
190
191 init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto);
192 if (init_sockets[0].fd == -1)
193 {
194 LOG (llevError, "Cannot create socket: %s\n", strerror (errno));
195 exit (-1);
196 }
197
198 insock.sin_family = AF_INET;
199 insock.sin_port = htons (settings.csport);
200 insock.sin_addr.s_addr = htonl (INADDR_ANY);
201
202 linger_opt.l_onoff = 0;
203 linger_opt.l_linger = 0;
204 if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_LINGER, (char *) &linger_opt, sizeof (struct linger)))
205 LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno));
206
207 {
208 int tmp = 1;
209
210 if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof (tmp)))
211 LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno));
212 }
213
214 if (bind (init_sockets[0].fd, (struct sockaddr *) &insock, sizeof (insock)) == (-1))
215 {
216 LOG (llevError, "Cannot bind socket to port %d: %s\n", ntohs (insock.sin_port), strerror (errno));
217 close (init_sockets[0].fd);
218 exit (-1);
219 }
220
221 if (listen (init_sockets[0].fd, 5) == (-1))
222 {
223 LOG (llevError, "Cannot listen on socket: %s\n", strerror (errno));
224 close (init_sockets[0].fd);
225 exit (-1);
226 }
227
228 init_sockets[0].status = Ns_Add;
229 read_client_images (); 207 read_client_images ();
230} 208}
231 209
232 210
233/******************************************************************************* 211/*******************************************************************************
… …
240void 218void
241free_all_newserver (void) 219free_all_newserver (void)
242{ 220{
243 LOG (llevDebug, "Freeing all new client/server information.\n"); 221 LOG (llevDebug, "Freeing all new client/server information.\n");
244 free_socket_images (); 222 free_socket_images ();
245 free (init_sockets);
246} 223}
247 224
248/** 225client *
249 * Frees a socket. 226client::create (int fd, const char *peername)
250 * Basically, all we need to do here is free all data structures that
251 * might be associated with the socket. It is up to the caller to
252 * update the list
253 */
254
255void
256free_newsocket (NewSocket *ns)
257{ 227{
258 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);
259 236
260 if (ns->stats.range) 237 ns->instantiate (); // effectively a nop right now
261 free (ns->stats.range);
262 238
263 if (ns->stats.title) 239 INVOKE_CLIENT (CONNECT, ns);
264 free (ns->stats.title);
265 240
266 free (ns->host); 241 return ns;
242 }
267} 243}
268 244
269/** Sends the 'goodbye' command to the player, and closes connection. */
270void
271final_free_player (player *pl)
272{
273 cs_write_string (&pl->socket, "goodbye", 8);
274 free_newsocket (&pl->socket);
275 free_player (pl);
276}

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