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Comparing deliantra/server/socket/init.C (file contents):
Revision 1.11 by root, Wed Dec 13 02:55:51 2006 UTC vs.
Revision 1.31 by root, Mon Dec 25 11:25:50 2006 UTC

… …
29 * 29 *
30 * Mainly deals with initialization and higher level socket 30 * Mainly deals with initialization and higher level socket
31 * maintenance (checking for lost connections and if data has arrived.) 31 * maintenance (checking for lost connections and if data has arrived.)
32 * The reading of data is handled in ericserver.c 32 * The reading of data is handled in ericserver.c
33 */ 33 */
34
35 34
36#include <global.h> 35#include <global.h>
37#include <sproto.h> 36#include <sproto.h>
38#include <sys/types.h> 37#include <sys/types.h>
39#include <sys/time.h> 38#include <sys/time.h>
40#include <sys/socket.h> 39#include <sys/socket.h>
41#include <netinet/in.h> 40#include <netinet/in.h>
41#include <netinet/tcp.h>
42#include <netinet/ip.h>
42#include <netdb.h> 43#include <netdb.h>
43 44
44#ifdef HAVE_UNISTD_H
45# include <unistd.h> 45#include <unistd.h>
46#endif
47
48#ifdef HAVE_ARPA_INET_H
49# include <arpa/inet.h> 46#include <arpa/inet.h>
50#endif
51#include <newserver.h>
52 47
53Socket_Info socket_info; 48#include <algorithm>
54NewSocket *init_sockets; 49
50sockvec clients;
55 51
56/** 52/**
57 * Initializes a connection. Really, it just sets up the data structure, 53 * Initializes a connection. Really, it just sets up the data structure,
58 * socket setup is handled elsewhere. We do send a version to the 54 * socket setup is handled elsewhere. We do send a version to the
59 * client. 55 * client.
60 */ 56 */
61void 57client::client (int fd, const char *peername)
62InitConnection (NewSocket *ns, const char *from_ip) 58: fd (fd), host (strdup (peername)),
59 socket_ev (this, &client::socket_cb),
60 cmd_ev (this, &client::cmd_cb),
61 cc_inv (this), cc_other (this)
63{ 62{
64 SockList sl; 63 {
65 char buf[256]; 64 struct linger linger_opt;
66 int bufsize = 65535; /*Supposed absolute upper limit */
67 int oldbufsize;
68 int buflen = sizeof (int);
69 65
70 if (fcntl (ns->fd, F_SETFL, O_NONBLOCK) == -1) 66 linger_opt.l_onoff = 0;
71 LOG (llevError, "InitConnection: Error on fcntl.\n"); 67 linger_opt.l_linger = 0;
72 68
73 if (getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) 69 if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger)))
74 oldbufsize = 0; 70 LOG (llevError, "SO_LINGER: %s\n", strerror (errno));
71 }
75 72
76 if (oldbufsize < bufsize) 73 {
77 if (setsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) 74 int val = IPTOS_LOWDELAY;
78 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
79 75
80 buflen = sizeof (oldbufsize); 76 if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val)))
81 getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); 77 LOG (llevError, "IP_TOS: %s\n", strerror (errno));
82#ifdef ESRV_DEBUG 78 }
83 LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize); 79
80 {
81 int val = 1;
82
83 if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val)))
84 LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno));
85 }
86
87#ifdef __linux__
88 {
89 int val;
90
91 // set some very aggressive keepalive parameters
92 val = 10;
93 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val)))
94 LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno));
95
96 val = 5;
97 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val)))
98 LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno));
99
100 val = 1;
101 if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val)))
102 LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno));
103 }
84#endif 104#endif
85 105
86 ns->faceset = 0; 106 {
87 ns->facecache = 0; 107 int bufsize = 65535; /*Supposed absolute upper limit */
88 ns->image2 = 0; 108 int oldbufsize;
89 ns->sound = 0; 109 int buflen = sizeof (int);
90 ns->exp64 = 0; 110
91 ns->monitor_spells = 0; 111 if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1)
112 LOG (llevError, "InitConnection: Error on fcntl.\n");
113
114 if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1)
115 oldbufsize = 0;
116
117 if (oldbufsize < bufsize)
118 if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize)))
119 LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize);
120
121 buflen = sizeof (oldbufsize);
122 getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen);
123 }
124
125 state = ST_SETUP;
92 ns->mapmode = Map0Cmd; 126 mapmode = Map0Cmd;
93 ns->darkness = 1; 127 darkness = 1;
94 ns->status = Ns_Add;
95 ns->mapx = 11; 128 mapx = 11;
96 ns->mapy = 11; 129 mapy = 11;
97 ns->newmapcmd = 0;
98 ns->itemcmd = 1; /* Default is version item1 command */ 130 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;
109 131
110 /* we should really do some checking here - if total clients overflows 132 faces_sent = salloc0<uint8> (nrofpixmaps);
111 * we need to do something more intelligent, because client id's will start 133
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 134 /* 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 135 * this face. Face 0 is sent to the client to say clear
128 * face information. 136 * face information.
129 */ 137 */
130 ns->faces_sent[0] = NS_FACESENT_FACE; 138 faces_sent[0] = NS_FACESENT_FACE;
131 139
132 ns->outputbuffer.start = 0; 140 // socket I/O is low priority
133 ns->outputbuffer.len = 0; 141 // we prefer to have the server run instead of handling client requests
134 ns->can_write = 1; 142 socket_ev.prio (PE_PRIO_NORMAL + 1);
135 ns->password_fails = 0; 143 socket_ev.fd (fd);
144 socket_ev.poll (PE_R);
136 145
137 ns->current_map = 0; 146 // command handling is even lower priority
138 ns->current_x = 0; 147 // that way no client can monopolise the server
139 ns->current_y = 0; 148 cmd_ev.prio (PE_PRIO_NORMAL + 2);
140 ns->client[0] = 0;
141 ns->buggy_mapscroll = 0;
142 149
143 ns->sent_scroll = 0; 150 // 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); 151 send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO);
146 sl.buf = (unsigned char *) buf; 152 flush ();
147 sl.len = strlen ((char *) buf); 153
148 Send_With_Handling (ns, &sl); 154 // clients are externally referenced by the socket
149#ifdef CS_LOGSTATS 155 refcnt_inc ();
150 if (socket_info.nconns > cst_tot.max_conn) 156 clients.push_back (this);
151 cst_tot.max_conn = socket_info.nconns; 157
152 if (socket_info.nconns > cst_lst.max_conn) 158#if 0//TODO
153 cst_lst.max_conn = socket_info.nconns; 159 socket_info.nconns++;
160 if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns;
161 if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns;
154#endif 162#endif
155} 163}
156 164
165client::~client ()
166{
167 sfree<uint8> (faces_sent, nrofpixmaps);
168 free (stats.range);
169 free (stats.title);
170 free (host);
171}
172
173void
174client::do_destroy ()
175{
176 attachable::do_destroy ();
177
178 sockvec::iterator i = find (clients.begin (), clients.end (), this);
179 if (i != clients.end ())
180 clients.erase (i);
181
182 if (pl)
183 pl->disconnect ();
184
185 if (fd >= 0)
186 close (fd);
187
188 state = ST_DEAD;
189
190 socket_ev.suspend ();
191 cmd_ev.suspend ();
192
193 // socket now longer references us
194 refcnt_dec ();
195}
157 196
158/** This sets up the socket and reads all the image information into memory. */ 197/** This sets up the socket and reads all the image information into memory. */
159void 198void
160init_ericserver (void) 199init_ericserver (void)
161{ 200{
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); 201 cst_tot.time_start = time (NULL);
176 cst_lst.time_start = time (NULL); 202 cst_lst.time_start = time (NULL);
177#endif
178 203
179 LOG (llevDebug, "Initialize new client/server data\n"); 204 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;
184 205
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 (); 206 read_client_images ();
231} 207}
232 208
233 209
234/******************************************************************************* 210/*******************************************************************************
… …
241void 217void
242free_all_newserver (void) 218free_all_newserver (void)
243{ 219{
244 LOG (llevDebug, "Freeing all new client/server information.\n"); 220 LOG (llevDebug, "Freeing all new client/server information.\n");
245 free_socket_images (); 221 free_socket_images ();
246 free (init_sockets);
247} 222}
248 223
249/** 224client *
250 * Frees a socket. 225client::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
256void
257free_newsocket (NewSocket *ns)
258{ 226{
259 close (ns->fd); 227 if (checkbanned (NULL, peername))
228 {
229 LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername);
230 return 0;
231 }
232 else
233 {
234 client *ns = new client (dup (fd), peername);
260 235
261 if (ns->stats.range) 236 ns->instantiate (); // effectively a nop right now
262 free (ns->stats.range);
263 237
264 if (ns->stats.title) 238 INVOKE_CLIENT (CONNECT, ns);
265 free (ns->stats.title);
266 239
267 free (ns->host); 240 return ns;
268 free (ns->inbuf.buf); 241 }
269} 242}
270 243
271/** Sends the 'goodbye' command to the player, and closes connection. */
272void
273final_free_player (player *pl)
274{
275 cs_write_string (&pl->socket, "goodbye", 8);
276 free_newsocket (&pl->socket);
277 free_player (pl);
278}

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