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Comparing deliantra/server/socket/init.C (file contents):
Revision 1.15 by root, Thu Dec 14 02:37:37 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>
54client_socket *init_sockets;
55 50
56client_socket::client_socket () 51sockvec clients;
57{
58}
59
60client_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 */
69void 58client::client (int fd, const char *peername)
70client_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),
62 cc_inv (this), cc_other (this)
71{ 63{
72 int bufsize = 65535; /*Supposed absolute upper limit */ 64 {
73 int oldbufsize; 65 struct linger linger_opt;
74 int buflen = sizeof (int);
75 66
76 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1) 67 linger_opt.l_onoff = 0;
77 LOG (llevError, "InitConnection: Error on fcntl.\n"); 68 linger_opt.l_linger = 0;
78 69
79 if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) 70 if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
80 oldbufsize = 0; 71 LOG (llevError, "SO_LINGER: %s\n", strerror (errno));
72 }
81 73
82 if (oldbufsize < bufsize) 74 {
83 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) 75 int val = IPTOS_LOWDELAY;
84 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
85 76
86 buflen = sizeof (oldbufsize); 77 if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val)))
87 getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); 78 LOG (llevError, "IP_TOS: %s\n", strerror (errno));
88#ifdef ESRV_DEBUG 79 }
89 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 }
90#endif 105#endif
91 106
92 faceset = 0; 107 {
93 facecache = 0; 108 int bufsize = 65535; /*Supposed absolute upper limit */
94 image2 = 0; 109 int oldbufsize;
95 sound = 0; 110 int buflen = sizeof (int);
96 exp64 = 0; 111
97 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;
98 mapmode = Map0Cmd; 127 mapmode = Map0Cmd;
99 darkness = 1; 128 darkness = 1;
100 status = Ns_Add;
101 mapx = 11; 129 mapx = 11;
102 mapy = 11; 130 mapy = 11;
103 newmapcmd = 0;
104 itemcmd = 1; /* Default is version item1 command */ 131 itemcmd = 1; /* Default is version item1 command */
105 ext_mapinfos = 0; /*extendedmapinfo datas */
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;
115 132
116 /* we should really do some checking here - if total clients overflows 133 faces_sent = salloc0<uint8> (nrofpixmaps);
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;
122 134
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 135 /* 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 136 * this face. Face 0 is sent to the client to say clear
133 * face information. 137 * face information.
134 */ 138 */
135 faces_sent[0] = NS_FACESENT_FACE; 139 faces_sent[0] = NS_FACESENT_FACE;
136 140
137 outputbuffer.start = 0; 141 // socket I/O is low priority
138 outputbuffer.len = 0; 142 // we prefer to have the server run instead of handling client requests
139 can_write = 1; 143 socket_ev.prio (PE_PRIO_NORMAL + 1);
140 password_fails = 0; 144 socket_ev.fd (fd);
145 socket_ev.poll (PE_R);
141 146
142 current_map = 0; 147 // command handling is even lower priority
143 current_x = 0; 148 // that way no client can monopolise the server
144 current_y = 0; 149 cmd_ev.prio (PE_PRIO_NORMAL + 2);
145 client[0] = 0;
146 buggy_mapscroll = 0;
147 150
148 sent_scroll = 0; 151 // 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); 152 send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
154 send_packet (sl); 153 flush ();
155 }
156 154
157 if (socket_info.nconns > cst_tot.max_conn) 155 // clients are externally referenced by the socket
158 cst_tot.max_conn = socket_info.nconns; 156 refcnt_inc ();
159 if (socket_info.nconns > cst_lst.max_conn) 157 clients.push_back (this);
160 cst_lst.max_conn = socket_info.nconns;
161}
162 158
159#if 0//TODO
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;
163#endif
164}
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}
163 197
164/** 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. */
165void 199void
166init_ericserver (void) 200init_ericserver (void)
167{ 201{
168 struct sockaddr_in insock;
169 struct protoent *protox;
170 struct linger linger_opt;
171
172 socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX);
173
174 socket_info.timeout.tv_sec = 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); 202 cst_tot.time_start = time (NULL);
181 cst_lst.time_start = time (NULL); 203 cst_lst.time_start = time (NULL);
182 204
183 LOG (llevDebug, "Initialize new client/server data\n"); 205 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;
188 206
189 protox = getprotobyname ("tcp");
190 if (protox == NULL)
191 {
192 LOG (llevError, "init_ericserver: Error getting protox\n");
193 return;
194 }
195
196 init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto);
197 if (init_sockets[0].fd == -1)
198 {
199 LOG (llevError, "Cannot create socket: %s\n", strerror (errno));
200 exit (-1);
201 }
202
203 insock.sin_family = AF_INET;
204 insock.sin_port = htons (settings.csport);
205 insock.sin_addr.s_addr = htonl (INADDR_ANY);
206
207 linger_opt.l_onoff = 0;
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 (); 207 read_client_images ();
235} 208}
236 209
237 210
238/******************************************************************************* 211/*******************************************************************************
… …
245void 218void
246free_all_newserver (void) 219free_all_newserver (void)
247{ 220{
248 LOG (llevDebug, "Freeing all new client/server information.\n"); 221 LOG (llevDebug, "Freeing all new client/server information.\n");
249 free_socket_images (); 222 free_socket_images ();
250 free (init_sockets);
251} 223}
252 224
253/** 225client *
254 * Frees a socket. 226client::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
260void
261free_newsocket (client_socket *ns)
262{ 227{
263 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);
264 236
265 if (ns->stats.range) 237 ns->instantiate (); // effectively a nop right now
266 free (ns->stats.range);
267 238
268 if (ns->stats.title) 239 INVOKE_CLIENT (CONNECT, ns);
269 free (ns->stats.title);
270 240
271 free (ns->host); 241 return ns;
242 }
272} 243}
273 244
274/** Sends the 'goodbye' command to the player, and closes connection. */
275void
276final_free_player (player *pl)
277{
278 pl->socket.send_packet ("goodbye");
279 free_newsocket (&pl->socket);
280 free_player (pl);
281}
282

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