1 |
elmex |
1.1 |
/* |
2 |
root |
1.49 |
* This file is part of Crossfire TRT, the Roguelike Realtime MORPG. |
3 |
pippijn |
1.36 |
* |
4 |
root |
1.46 |
* Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team |
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* Copyright (©) 2001,2007 Mark Wedel |
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* Copyright (©) 1992,2007 Frank Tore Johansen |
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pippijn |
1.36 |
* |
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root |
1.49 |
* Crossfire TRT is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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pippijn |
1.36 |
* |
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root |
1.49 |
* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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pippijn |
1.36 |
* |
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root |
1.49 |
* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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root |
1.46 |
* |
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* The authors can be reached via e-mail to <crossfire@schmorp.de> |
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pippijn |
1.36 |
*/ |
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elmex |
1.1 |
|
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/** |
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* \file |
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* Socket general functions |
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* |
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* \date 2003-12-02 |
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* |
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* Mainly deals with initialization and higher level socket |
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* maintenance (checking for lost connections and if data has arrived.) |
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* The reading of data is handled in ericserver.c |
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*/ |
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#include <global.h> |
36 |
root |
1.11 |
#include <sproto.h> |
37 |
pippijn |
1.10 |
#include <sys/types.h> |
38 |
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#include <sys/time.h> |
39 |
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#include <sys/socket.h> |
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#include <netinet/in.h> |
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root |
1.23 |
#include <netinet/tcp.h> |
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#include <netinet/ip.h> |
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pippijn |
1.10 |
#include <netdb.h> |
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elmex |
1.1 |
|
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root |
1.19 |
#include <unistd.h> |
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#include <arpa/inet.h> |
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elmex |
1.1 |
|
48 |
root |
1.31 |
#include <algorithm> |
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|
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root |
1.48 |
// use relatively small values, as we do not expect to receive much, |
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// and we do userspace write buffering |
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// 8kb limits throughput to roughly 66kb/s |
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#define SOCKET_RCVBUF 8192 |
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#define SOCKET_SNDBUF 16384 |
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root |
1.20 |
sockvec clients; |
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elmex |
1.1 |
|
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/** |
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* Initializes a connection. Really, it just sets up the data structure, |
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* socket setup is handled elsewhere. We do send a version to the |
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* client. |
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*/ |
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root |
1.20 |
client::client (int fd, const char *peername) |
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root |
1.17 |
: fd (fd), host (strdup (peername)), |
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root |
1.21 |
socket_ev (this, &client::socket_cb), |
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root |
1.44 |
cmd_ev (this, &client::cmd_cb) |
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elmex |
1.1 |
{ |
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root |
1.34 |
refcnt_inc (); // the socket is an external reference |
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root |
1.43 |
mss = 1500 - 52; // 1500 typical ethernet frame, 66 typical tcp header overhead |
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root |
1.42 |
|
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root |
1.16 |
{ |
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struct linger linger_opt; |
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|
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root |
1.44 |
linger_opt.l_onoff = 0; |
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root |
1.16 |
linger_opt.l_linger = 0; |
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if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger))) |
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root |
1.23 |
LOG (llevError, "SO_LINGER: %s\n", strerror (errno)); |
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root |
1.16 |
} |
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{ |
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root |
1.42 |
int val; |
84 |
root |
1.23 |
|
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root |
1.48 |
#ifdef SO_RCVBUF |
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val = SOCKET_RCVBUF; |
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if (setsockopt (fd, SOL_SOCKET, SO_RCVBUF, &val, sizeof (val))) |
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LOG (llevError, "SO_RCVBUF: %s\n", strerror (errno)); |
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#endif |
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#ifdef SO_SNDBUF |
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val = SOCKET_SNDBUF; |
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if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, &val, sizeof (val))) |
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LOG (llevError, "SO_SNDBUF: %s\n", strerror (errno)); |
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#endif |
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root |
1.42 |
#ifdef IP_TOS |
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val = IPTOS_LOWDELAY; |
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root |
1.23 |
if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val))) |
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LOG (llevError, "IP_TOS: %s\n", strerror (errno)); |
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root |
1.42 |
#endif |
102 |
root |
1.23 |
|
103 |
root |
1.42 |
#ifdef TCP_NODELAY |
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val = 1; |
105 |
root |
1.23 |
if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val))) |
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LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno)); |
107 |
root |
1.42 |
#endif |
108 |
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// set some very aggressive keepalive parameters |
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#ifdef TCP_KEEPIDLE |
111 |
root |
1.44 |
val = 1; |
112 |
root |
1.42 |
if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val))) |
113 |
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LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno)); |
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#endif |
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#ifdef TCP_KEEPCNT |
117 |
root |
1.44 |
val = 3; |
118 |
root |
1.42 |
if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val))) |
119 |
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LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno)); |
120 |
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#endif |
121 |
root |
1.23 |
|
122 |
root |
1.42 |
#ifdef TCP_KEEPINTVL |
123 |
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val = 1; |
124 |
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if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val))) |
125 |
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LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno)); |
126 |
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#endif |
127 |
root |
1.23 |
|
128 |
root |
1.42 |
// try to find the mss value in use |
129 |
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#ifdef TCP_MAXSEG |
130 |
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socklen_t sl = sizeof (val); |
131 |
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if (!getsockopt (fd, IPPROTO_TCP, TCP_MAXSEG, &val, &sl) && sl == sizeof (val)) |
132 |
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mss = val; |
133 |
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#endif |
134 |
root |
1.23 |
} |
135 |
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136 |
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{ |
137 |
root |
1.16 |
int bufsize = 65535; /*Supposed absolute upper limit */ |
138 |
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int oldbufsize; |
139 |
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int buflen = sizeof (int); |
140 |
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if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1) |
142 |
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LOG (llevError, "InitConnection: Error on fcntl.\n"); |
143 |
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if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) |
145 |
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oldbufsize = 0; |
146 |
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147 |
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if (oldbufsize < bufsize) |
148 |
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if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) |
149 |
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LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); |
150 |
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151 |
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buflen = sizeof (oldbufsize); |
152 |
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getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
153 |
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} |
154 |
elmex |
1.1 |
|
155 |
root |
1.28 |
state = ST_SETUP; |
156 |
root |
1.15 |
mapmode = Map0Cmd; |
157 |
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darkness = 1; |
158 |
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mapx = 11; |
159 |
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mapy = 11; |
160 |
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itemcmd = 1; /* Default is version item1 command */ |
161 |
root |
1.41 |
max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default |
162 |
root |
1.12 |
|
163 |
root |
1.7 |
/* Do this so we don't send a face command for the client for |
164 |
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* this face. Face 0 is sent to the client to say clear |
165 |
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* face information. |
166 |
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*/ |
167 |
root |
1.40 |
faces_sent[0] = true; |
168 |
root |
1.50 |
fx_want [FT_FACE] = true; // all clients must support image faces |
169 |
root |
1.7 |
|
170 |
root |
1.37 |
socket_ev.prio (PE_PRIO_NORMAL); |
171 |
root |
1.18 |
socket_ev.fd (fd); |
172 |
root |
1.21 |
socket_ev.poll (PE_R); |
173 |
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174 |
root |
1.37 |
cmd_ev.prio (PE_PRIO_NORMAL); |
175 |
root |
1.15 |
|
176 |
root |
1.16 |
// initialisation done, kick it! |
177 |
root |
1.21 |
send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); |
178 |
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flush (); |
179 |
root |
1.13 |
|
180 |
root |
1.35 |
reset_stats (); |
181 |
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182 |
root |
1.34 |
clients.insert (this); |
183 |
elmex |
1.1 |
} |
184 |
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185 |
root |
1.20 |
client::~client () |
186 |
root |
1.16 |
{ |
187 |
root |
1.34 |
clients.erase (this); |
188 |
root |
1.32 |
|
189 |
root |
1.51 |
mapinfo_queue_clear (); |
190 |
root |
1.22 |
free (stats.range); |
191 |
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free (stats.title); |
192 |
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free (host); |
193 |
root |
1.21 |
} |
194 |
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195 |
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void |
196 |
root |
1.31 |
client::do_destroy () |
197 |
root |
1.21 |
{ |
198 |
root |
1.31 |
attachable::do_destroy (); |
199 |
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200 |
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if (pl) |
201 |
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pl->disconnect (); |
202 |
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203 |
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if (fd >= 0) |
204 |
root |
1.34 |
{ |
205 |
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send_packet ("goodbye"); |
206 |
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flush (); |
207 |
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208 |
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close (fd); |
209 |
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} |
210 |
root |
1.29 |
|
211 |
root |
1.28 |
state = ST_DEAD; |
212 |
root |
1.27 |
|
213 |
root |
1.21 |
socket_ev.suspend (); |
214 |
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cmd_ev.suspend (); |
215 |
root |
1.31 |
|
216 |
root |
1.34 |
refcnt_dec (); // socket no longer open |
217 |
root |
1.16 |
} |
218 |
elmex |
1.1 |
|
219 |
root |
1.35 |
void |
220 |
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client::reset_stats () |
221 |
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{ |
222 |
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/* we need to clear these to -1 and not zero - otherwise, |
223 |
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* if a player quits and starts a new character, we wont |
224 |
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* send new values to the client, as things like exp start |
225 |
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* at zero. |
226 |
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*/ |
227 |
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for (int i = 0; i < NUM_SKILLS; i++) |
228 |
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last_skill_exp[i] = -1; |
229 |
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230 |
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for (int i = 0; i < NROFATTACKS; i++) |
231 |
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last_resist[i] = -1; |
232 |
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233 |
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last_weapon_sp = -1; |
234 |
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last_level = -1; |
235 |
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last_stats.exp = -1; |
236 |
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last_weight = (uint32) - 1; |
237 |
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last_flags = 0; |
238 |
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last_weight = 0; |
239 |
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last_weight_limit = 0; |
240 |
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last_path_attuned = 0; |
241 |
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last_path_repelled = 0; |
242 |
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last_path_denied = 0; |
243 |
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last_speed = 0; |
244 |
root |
1.45 |
last_flags = 0; |
245 |
root |
1.35 |
|
246 |
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static living zero_living; |
247 |
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last_stats = zero_living; |
248 |
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} |
249 |
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250 |
root |
1.27 |
client * |
251 |
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client::create (int fd, const char *peername) |
252 |
root |
1.16 |
{ |
253 |
root |
1.38 |
client *ns = new client (dup (fd), peername); |
254 |
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ns->instantiate (); // effectively a nop right now |
255 |
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INVOKE_CLIENT (CONNECT, ns); |
256 |
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return ns; |
257 |
root |
1.16 |
} |
258 |
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