1 |
/* |
2 |
CrossFire, A Multiplayer game for X-windows |
3 |
|
4 |
Copyright (C) 2001 Mark Wedel |
5 |
Copyright (C) 1992 Frank Tore Johansen |
6 |
|
7 |
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 |
the Free Software Foundation; either version 2 of the License, or |
10 |
(at your option) any later version. |
11 |
|
12 |
This program is distributed in the hope that it will be useful, |
13 |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 |
GNU General Public License for more details. |
16 |
|
17 |
You should have received a copy of the GNU General Public License |
18 |
along with this program; if not, write to the Free Software |
19 |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
20 |
|
21 |
The author can be reached via e-mail to <crossfire@schmorp.de> |
22 |
*/ |
23 |
|
24 |
/** |
25 |
* \file |
26 |
* Socket general functions |
27 |
* |
28 |
* \date 2003-12-02 |
29 |
* |
30 |
* Mainly deals with initialization and higher level socket |
31 |
* maintenance (checking for lost connections and if data has arrived.) |
32 |
* The reading of data is handled in ericserver.c |
33 |
*/ |
34 |
|
35 |
|
36 |
#include <global.h> |
37 |
#include <sproto.h> |
38 |
#include <sys/types.h> |
39 |
#include <sys/time.h> |
40 |
#include <sys/socket.h> |
41 |
#include <netinet/in.h> |
42 |
#include <netinet/tcp.h> |
43 |
#include <netinet/ip.h> |
44 |
#include <netdb.h> |
45 |
|
46 |
#include <unistd.h> |
47 |
#include <arpa/inet.h> |
48 |
|
49 |
sockvec clients; |
50 |
|
51 |
/** |
52 |
* Initializes a connection. Really, it just sets up the data structure, |
53 |
* socket setup is handled elsewhere. We do send a version to the |
54 |
* client. |
55 |
*/ |
56 |
client::client (int fd, const char *peername) |
57 |
: fd (fd), host (strdup (peername)), |
58 |
socket_ev (this, &client::socket_cb), |
59 |
cmd_ev (this, &client::cmd_cb) |
60 |
{ |
61 |
{ |
62 |
struct linger linger_opt; |
63 |
|
64 |
linger_opt.l_onoff = 0; |
65 |
linger_opt.l_linger = 0; |
66 |
|
67 |
if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger))) |
68 |
LOG (llevError, "SO_LINGER: %s\n", strerror (errno)); |
69 |
} |
70 |
|
71 |
{ |
72 |
int val = IPTOS_LOWDELAY; |
73 |
|
74 |
if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val))) |
75 |
LOG (llevError, "IP_TOS: %s\n", strerror (errno)); |
76 |
} |
77 |
|
78 |
{ |
79 |
int val = 1; |
80 |
|
81 |
if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val))) |
82 |
LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno)); |
83 |
} |
84 |
|
85 |
#ifdef __linux__ |
86 |
{ |
87 |
int val; |
88 |
|
89 |
// set some very aggressive keepalive parameters |
90 |
val = 10; |
91 |
if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val))) |
92 |
LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno)); |
93 |
|
94 |
val = 5; |
95 |
if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val))) |
96 |
LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno)); |
97 |
|
98 |
val = 1; |
99 |
if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val))) |
100 |
LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno)); |
101 |
} |
102 |
#endif |
103 |
|
104 |
{ |
105 |
int bufsize = 65535; /*Supposed absolute upper limit */ |
106 |
int oldbufsize; |
107 |
int buflen = sizeof (int); |
108 |
|
109 |
if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1) |
110 |
LOG (llevError, "InitConnection: Error on fcntl.\n"); |
111 |
|
112 |
if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) |
113 |
oldbufsize = 0; |
114 |
|
115 |
if (oldbufsize < bufsize) |
116 |
if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) |
117 |
LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); |
118 |
|
119 |
buflen = sizeof (oldbufsize); |
120 |
getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
121 |
} |
122 |
|
123 |
mapmode = Map0Cmd; |
124 |
darkness = 1; |
125 |
status = Ns_Add; |
126 |
mapx = 11; |
127 |
mapy = 11; |
128 |
itemcmd = 1; /* Default is version item1 command */ |
129 |
|
130 |
faces_sent = salloc<uint8> (nrofpixmaps, 0); |
131 |
|
132 |
/* Do this so we don't send a face command for the client for |
133 |
* this face. Face 0 is sent to the client to say clear |
134 |
* face information. |
135 |
*/ |
136 |
faces_sent[0] = NS_FACESENT_FACE; |
137 |
|
138 |
// socket I/O is low priority |
139 |
// we prefer to have the server run instead of handling client requests |
140 |
socket_ev.prio (PE_PRIO_NORMAL + 1); |
141 |
socket_ev.fd (fd); |
142 |
socket_ev.poll (PE_R); |
143 |
|
144 |
// command handling is even lower priority |
145 |
// that way no client can monopolise the server |
146 |
cmd_ev.prio (PE_PRIO_NORMAL + 2); |
147 |
|
148 |
// initialisation done, kick it! |
149 |
send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); |
150 |
flush (); |
151 |
|
152 |
#if 0//TODO |
153 |
socket_info.nconns++; |
154 |
if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns; |
155 |
if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns; |
156 |
#endif |
157 |
} |
158 |
|
159 |
client::~client () |
160 |
{ |
161 |
if (pl) |
162 |
pl->socket = 0; |
163 |
|
164 |
if (fd >= 0) |
165 |
close (fd); |
166 |
|
167 |
free (faces_sent); |
168 |
free (stats.range); |
169 |
free (stats.title); |
170 |
free (host); |
171 |
} |
172 |
|
173 |
void |
174 |
client::destroy () |
175 |
{ |
176 |
status = Ns_Dead; |
177 |
socket_ev.suspend (); |
178 |
cmd_ev.suspend (); |
179 |
} |
180 |
|
181 |
/** This sets up the socket and reads all the image information into memory. */ |
182 |
void |
183 |
init_ericserver (void) |
184 |
{ |
185 |
cst_tot.time_start = time (NULL); |
186 |
cst_lst.time_start = time (NULL); |
187 |
|
188 |
LOG (llevDebug, "Initialize new client/server data\n"); |
189 |
|
190 |
read_client_images (); |
191 |
} |
192 |
|
193 |
|
194 |
/******************************************************************************* |
195 |
* |
196 |
* Start of functions dealing with freeing of the data. |
197 |
* |
198 |
******************************************************************************/ |
199 |
|
200 |
/** Free's all the memory that ericserver allocates. */ |
201 |
void |
202 |
free_all_newserver (void) |
203 |
{ |
204 |
LOG (llevDebug, "Freeing all new client/server information.\n"); |
205 |
free_socket_images (); |
206 |
} |
207 |
|
208 |
/** Sends the 'goodbye' command to the player, and closes connection. */ |
209 |
void |
210 |
final_free_player (player *pl) |
211 |
{ |
212 |
free_player (pl); |
213 |
} |
214 |
|
215 |
bool |
216 |
add_client (int fd, const char *peername) |
217 |
{ |
218 |
if (checkbanned (NULL, peername)) |
219 |
{ |
220 |
LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername); |
221 |
return false; |
222 |
} |
223 |
else |
224 |
{ |
225 |
client *ns = new client (dup (fd), peername); |
226 |
clients.push_back (ns); |
227 |
return true; |
228 |
} |
229 |
} |
230 |
|