1 | /* |
1 | /* |
2 | CrossFire, A Multiplayer game for X-windows |
2 | * This file is part of Crossfire TRT, the Roguelike Realtime MORPG. |
3 | |
3 | * |
|
|
4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team |
4 | Copyright (C) 2001 Mark Wedel |
5 | * Copyright (©) 2001,2007 Mark Wedel |
5 | Copyright (C) 1992 Frank Tore Johansen |
6 | * Copyright (©) 1992,2007 Frank Tore Johansen |
6 | |
7 | * |
7 | This program is free software; you can redistribute it and/or modify |
8 | * Crossfire TRT 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 |
9 | the Free Software Foundation; either version 2 of the License, or |
10 | * the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. |
11 | * (at your option) any later version. |
11 | |
12 | * |
12 | This program is distributed in the hope that it will be useful, |
13 | * This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | GNU General Public License for more details. |
16 | * GNU General Public License for more details. |
16 | |
17 | * |
17 | You should have received a copy of the GNU General Public License |
18 | * 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 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
20 | * |
20 | |
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21 | The author can be reached via e-mail to <crossfire@schmorp.de> |
21 | * The authors can be reached via e-mail to <crossfire@schmorp.de> |
22 | */ |
22 | */ |
23 | |
23 | |
24 | /** |
24 | /** |
25 | * \file |
25 | * \file |
26 | * Socket general functions |
26 | * Socket general functions |
27 | * |
27 | * |
… | |
… | |
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 | |
34 | |
35 | |
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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> |
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41 | #include <netinet/tcp.h> |
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42 | #include <netinet/ip.h> |
42 | #include <netdb.h> |
43 | #include <netdb.h> |
43 | |
44 | |
44 | #ifdef HAVE_UNISTD_H |
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45 | # include <unistd.h> |
45 | #include <unistd.h> |
46 | #endif |
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47 | |
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48 | #ifdef HAVE_ARPA_INET_H |
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49 | # include <arpa/inet.h> |
46 | #include <arpa/inet.h> |
50 | #endif |
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51 | #include <newserver.h> |
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52 | |
47 | |
53 | Socket_Info socket_info; |
48 | #include <algorithm> |
54 | NewSocket *init_sockets; |
49 | |
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50 | // use relatively small values, as we do not expect to receive much, |
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51 | // and we do userspace write buffering |
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52 | // 8kb limits throughput to roughly 66kb/s |
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53 | #define SOCKET_RCVBUF 8192 |
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54 | #define SOCKET_SNDBUF 16384 |
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55 | |
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56 | sockvec clients; |
55 | |
57 | |
56 | /** |
58 | /** |
57 | * Initializes a connection. Really, it just sets up the data structure, |
59 | * Initializes a connection. Really, it just sets up the data structure, |
58 | * socket setup is handled elsewhere. We do send a version to the |
60 | * socket setup is handled elsewhere. We do send a version to the |
59 | * client. |
61 | * client. |
60 | */ |
62 | */ |
61 | void |
63 | client::client (int fd, const char *peername) |
62 | InitConnection (NewSocket *ns, const char *from_ip) |
64 | : fd (fd), host (strdup (peername)), |
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65 | socket_ev (this, &client::socket_cb), |
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66 | cmd_ev (this, &client::cmd_cb) |
63 | { |
67 | { |
64 | SockList sl; |
68 | refcnt_inc (); // the socket is an external reference |
65 | char buf[256]; |
69 | |
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70 | mss = 1500 - 52; // 1500 typical ethernet frame, 66 typical tcp header overhead |
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71 | |
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72 | { |
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73 | struct linger linger_opt; |
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74 | |
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75 | linger_opt.l_onoff = 0; |
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76 | linger_opt.l_linger = 0; |
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77 | |
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78 | if (setsockopt (fd, SOL_SOCKET, SO_LINGER, &linger_opt, sizeof (struct linger))) |
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79 | LOG (llevError, "SO_LINGER: %s\n", strerror (errno)); |
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80 | } |
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81 | |
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82 | { |
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83 | int val; |
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84 | |
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85 | #ifdef SO_RCVBUF |
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86 | val = SOCKET_RCVBUF; |
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87 | if (setsockopt (fd, SOL_SOCKET, SO_RCVBUF, &val, sizeof (val))) |
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88 | LOG (llevError, "SO_RCVBUF: %s\n", strerror (errno)); |
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89 | #endif |
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90 | |
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91 | #ifdef SO_SNDBUF |
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92 | val = SOCKET_SNDBUF; |
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93 | if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, &val, sizeof (val))) |
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94 | LOG (llevError, "SO_SNDBUF: %s\n", strerror (errno)); |
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95 | #endif |
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96 | |
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97 | #ifdef IP_TOS |
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98 | val = IPTOS_LOWDELAY; |
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99 | if (setsockopt (fd, IPPROTO_IP, IP_TOS, &val, sizeof (val))) |
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100 | LOG (llevError, "IP_TOS: %s\n", strerror (errno)); |
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101 | #endif |
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102 | |
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103 | #ifdef TCP_NODELAY |
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104 | val = 1; |
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105 | if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val))) |
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106 | LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno)); |
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107 | #endif |
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108 | |
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109 | // set some very aggressive keepalive parameters |
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110 | #ifdef TCP_KEEPIDLE |
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111 | val = 1; |
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112 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val))) |
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113 | LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno)); |
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114 | #endif |
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115 | |
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116 | #ifdef TCP_KEEPCNT |
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117 | val = 3; |
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118 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val))) |
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119 | LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno)); |
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120 | #endif |
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121 | |
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122 | #ifdef TCP_KEEPINTVL |
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123 | val = 1; |
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124 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val))) |
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125 | LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno)); |
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126 | #endif |
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127 | |
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128 | // try to find the mss value in use |
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129 | #ifdef TCP_MAXSEG |
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130 | socklen_t sl = sizeof (val); |
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131 | if (!getsockopt (fd, IPPROTO_TCP, TCP_MAXSEG, &val, &sl) && sl == sizeof (val)) |
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132 | mss = val; |
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133 | #endif |
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134 | } |
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135 | |
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136 | { |
66 | int bufsize = 65535; /*Supposed absolute upper limit */ |
137 | int bufsize = 65535; /*Supposed absolute upper limit */ |
67 | int oldbufsize; |
138 | int oldbufsize; |
68 | int buflen = sizeof (int); |
139 | int buflen = sizeof (int); |
69 | |
140 | |
70 | if (fcntl (ns->fd, F_SETFL, O_NONBLOCK) == -1) |
141 | if (fcntl (fd, F_SETFL, O_NONBLOCK) == -1) |
71 | LOG (llevError, "InitConnection: Error on fcntl.\n"); |
142 | LOG (llevError, "InitConnection: Error on fcntl.\n"); |
72 | |
143 | |
73 | if (getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) |
144 | if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) |
74 | oldbufsize = 0; |
145 | oldbufsize = 0; |
75 | |
146 | |
76 | if (oldbufsize < bufsize) |
147 | if (oldbufsize < bufsize) |
77 | if (setsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) |
148 | if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) |
78 | LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); |
149 | LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); |
79 | |
150 | |
80 | buflen = sizeof (oldbufsize); |
151 | buflen = sizeof (oldbufsize); |
81 | getsockopt (ns->fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
152 | getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
82 | #ifdef ESRV_DEBUG |
153 | } |
83 | LOG (llevDebug, "Socket buffer size now %d bytes\n", oldbufsize); |
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84 | #endif |
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85 | |
154 | |
86 | ns->faceset = 0; |
155 | state = ST_SETUP; |
87 | ns->facecache = 0; |
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88 | ns->image2 = 0; |
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89 | ns->sound = 0; |
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90 | ns->exp64 = 0; |
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91 | ns->monitor_spells = 0; |
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92 | ns->mapmode = Map0Cmd; |
156 | mapmode = Map0Cmd; |
93 | ns->darkness = 1; |
157 | darkness = 1; |
94 | ns->status = Ns_Add; |
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95 | ns->mapx = 11; |
158 | mapx = 11; |
96 | ns->mapy = 11; |
159 | mapy = 11; |
97 | ns->newmapcmd = 0; |
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98 | ns->itemcmd = 1; /* Default is version item1 command */ |
160 | itemcmd = 1; /* Default is version item1 command */ |
99 | ns->ext_mapinfos = 0; /*extendedmapinfo datas */ |
161 | max_rate = 100000 / (1000000 / MAX_TIME); // ~1mbit is assumed per default |
100 | ns->EMI_smooth = 0; |
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101 | ns->look_position = 0; |
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102 | ns->update_look = 0; |
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103 | ns->has_readable_type = 0; |
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104 | ns->supported_readables = 0; |
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105 | ns->monitor_spells = 0; |
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106 | ns->mapinfocmd = 0; |
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107 | ns->extcmd = 0; |
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108 | ns->extmap = 0; |
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109 | |
162 | |
110 | /* we should really do some checking here - if total clients overflows |
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111 | * we need to do something more intelligent, because client id's will start |
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112 | * duplicating (not likely in normal cases, but malicous attacks that |
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113 | * just open and close connections could get this total up. |
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114 | */ |
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115 | ns->inbuf_len = 0; |
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116 | |
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117 | /* Basic initialization. Needed because we do a check in |
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118 | * HandleClient for oldsocketmode without checking the |
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119 | * length of data. |
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120 | */ |
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121 | memset (&ns->lastmap, 0, sizeof (struct Map)); |
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122 | memset (ns->faces_sent, 0, ns->faces_sent_len * sizeof (*ns->faces_sent)); |
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123 | memset (&ns->anims_sent, 0, sizeof (ns->anims_sent)); |
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124 | memset (&ns->stats, 0, sizeof (struct statsinfo)); |
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125 | /* Do this so we don't send a face command for the client for |
163 | /* 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 |
164 | * this face. Face 0 is sent to the client to say clear |
127 | * face information. |
165 | * face information. |
128 | */ |
166 | */ |
129 | ns->faces_sent[0] = NS_FACESENT_FACE; |
167 | faces_sent[0] = true; |
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168 | fx_want [FT_FACE] = true; // all clients must support image faces |
130 | |
169 | |
131 | ns->outputbuffer.start = 0; |
170 | socket_ev.prio (PE_PRIO_NORMAL); |
132 | ns->outputbuffer.len = 0; |
171 | socket_ev.fd (fd); |
133 | ns->can_write = 1; |
172 | socket_ev.poll (PE_R); |
134 | ns->password_fails = 0; |
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135 | |
173 | |
136 | ns->current_map = 0; |
174 | cmd_ev.prio (PE_PRIO_NORMAL); |
137 | ns->current_x = 0; |
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138 | ns->current_y = 0; |
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139 | ns->client[0] = 0; |
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140 | ns->buggy_mapscroll = 0; |
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141 | |
175 | |
142 | ns->sent_scroll = 0; |
176 | // initialisation done, kick it! |
143 | ns->host = strdup_local (from_ip); |
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144 | sprintf ((char *) buf, "version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); |
177 | send_packet_printf ("version %d %d %s\n", VERSION_CS, VERSION_SC, VERSION_INFO); |
145 | sl.buf = (unsigned char *) buf; |
178 | flush (); |
146 | sl.len = strlen ((char *) buf); |
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147 | Send_With_Handling (ns, &sl); |
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148 | #ifdef CS_LOGSTATS |
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149 | if (socket_info.nconns > cst_tot.max_conn) |
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150 | cst_tot.max_conn = socket_info.nconns; |
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151 | if (socket_info.nconns > cst_lst.max_conn) |
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152 | cst_lst.max_conn = socket_info.nconns; |
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153 | #endif |
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154 | } |
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155 | |
179 | |
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180 | reset_stats (); |
156 | |
181 | |
157 | /** This sets up the socket and reads all the image information into memory. */ |
182 | clients.insert (this); |
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183 | } |
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184 | |
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185 | client::~client () |
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186 | { |
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187 | clients.erase (this); |
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188 | |
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189 | mapinfo_queue_clear (); |
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190 | free (stats.range); |
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191 | free (stats.title); |
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192 | free (host); |
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193 | } |
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194 | |
158 | void |
195 | void |
159 | init_ericserver (void) |
196 | client::do_destroy () |
160 | { |
197 | { |
161 | struct sockaddr_in insock; |
198 | attachable::do_destroy (); |
162 | struct protoent *protox; |
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163 | struct linger linger_opt; |
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164 | |
199 | |
165 | socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX); |
200 | if (pl) |
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201 | pl->disconnect (); |
166 | |
202 | |
167 | socket_info.timeout.tv_sec = 0; |
203 | if (fd >= 0) |
168 | socket_info.timeout.tv_usec = 0; |
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169 | socket_info.nconns = 0; |
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170 | |
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171 | #ifdef CS_LOGSTATS |
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172 | memset (&cst_tot, 0, sizeof (CS_Stats)); |
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173 | memset (&cst_lst, 0, sizeof (CS_Stats)); |
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174 | cst_tot.time_start = time (NULL); |
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175 | cst_lst.time_start = time (NULL); |
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176 | #endif |
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177 | |
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178 | LOG (llevDebug, "Initialize new client/server data\n"); |
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179 | socket_info.nconns = 1; |
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180 | init_sockets = (NewSocket *) malloc (sizeof (NewSocket)); |
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181 | init_sockets[0].faces_sent = NULL; /* unused */ |
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182 | socket_info.allocated_sockets = 1; |
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183 | |
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184 | protox = getprotobyname ("tcp"); |
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185 | if (protox == NULL) |
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186 | { |
204 | { |
187 | LOG (llevError, "init_ericserver: Error getting protox\n"); |
205 | send_packet ("goodbye"); |
188 | return; |
206 | flush (); |
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207 | |
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208 | close (fd); |
189 | } |
209 | } |
190 | |
210 | |
191 | init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto); |
211 | state = ST_DEAD; |
192 | if (init_sockets[0].fd == -1) |
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193 | { |
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194 | LOG (llevError, "Cannot create socket: %s\n", strerror (errno)); |
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195 | exit (-1); |
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196 | } |
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197 | |
212 | |
198 | insock.sin_family = AF_INET; |
213 | socket_ev.suspend (); |
199 | insock.sin_port = htons (settings.csport); |
214 | cmd_ev.suspend (); |
200 | insock.sin_addr.s_addr = htonl (INADDR_ANY); |
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201 | |
215 | |
202 | linger_opt.l_onoff = 0; |
216 | refcnt_dec (); // socket no longer open |
203 | linger_opt.l_linger = 0; |
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204 | if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_LINGER, (char *) &linger_opt, sizeof (struct linger))) |
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205 | LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno)); |
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206 | |
|
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207 | { |
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208 | int tmp = 1; |
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209 | |
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210 | if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof (tmp))) |
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211 | LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno)); |
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212 | } |
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213 | |
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214 | if (bind (init_sockets[0].fd, (struct sockaddr *) &insock, sizeof (insock)) == (-1)) |
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215 | { |
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216 | LOG (llevError, "Cannot bind socket to port %d: %s\n", ntohs (insock.sin_port), strerror (errno)); |
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217 | close (init_sockets[0].fd); |
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218 | exit (-1); |
|
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219 | } |
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220 | |
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221 | if (listen (init_sockets[0].fd, 5) == (-1)) |
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222 | { |
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223 | LOG (llevError, "Cannot listen on socket: %s\n", strerror (errno)); |
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224 | close (init_sockets[0].fd); |
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225 | exit (-1); |
|
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226 | } |
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227 | |
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228 | init_sockets[0].status = Ns_Add; |
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229 | read_client_images (); |
|
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230 | } |
217 | } |
231 | |
218 | |
232 | |
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233 | /******************************************************************************* |
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234 | * |
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235 | * Start of functions dealing with freeing of the data. |
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236 | * |
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237 | ******************************************************************************/ |
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238 | |
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239 | /** Free's all the memory that ericserver allocates. */ |
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240 | void |
219 | void |
241 | free_all_newserver (void) |
220 | client::reset_stats () |
242 | { |
221 | { |
243 | LOG (llevDebug, "Freeing all new client/server information.\n"); |
222 | /* we need to clear these to -1 and not zero - otherwise, |
244 | free_socket_images (); |
223 | * if a player quits and starts a new character, we wont |
245 | free (init_sockets); |
224 | * send new values to the client, as things like exp start |
246 | } |
225 | * at zero. |
247 | |
|
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248 | /** |
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249 | * Frees a socket. |
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250 | * Basically, all we need to do here is free all data structures that |
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251 | * might be associated with the socket. It is up to the caller to |
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252 | * update the list |
|
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253 | */ |
226 | */ |
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227 | for (int i = 0; i < NUM_SKILLS; i++) |
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228 | last_skill_exp[i] = -1; |
254 | |
229 | |
255 | void |
230 | for (int i = 0; i < NROFATTACKS; i++) |
256 | free_newsocket (NewSocket *ns) |
231 | last_resist[i] = -1; |
257 | { |
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258 | close (ns->fd); |
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259 | |
232 | |
260 | if (ns->stats.range) |
233 | last_weapon_sp = -1; |
261 | free (ns->stats.range); |
234 | last_level = -1; |
|
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235 | last_stats.exp = -1; |
|
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236 | last_weight = (uint32) - 1; |
|
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237 | last_flags = 0; |
|
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238 | last_weight = 0; |
|
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239 | last_weight_limit = 0; |
|
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240 | last_path_attuned = 0; |
|
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241 | last_path_repelled = 0; |
|
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242 | last_path_denied = 0; |
|
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243 | last_speed = 0; |
|
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244 | last_flags = 0; |
262 | |
245 | |
263 | if (ns->stats.title) |
246 | static living zero_living; |
264 | free (ns->stats.title); |
247 | last_stats = zero_living; |
265 | |
|
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266 | free (ns->host); |
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267 | } |
248 | } |
268 | |
249 | |
269 | /** Sends the 'goodbye' command to the player, and closes connection. */ |
250 | client * |
270 | void |
251 | client::create (int fd, const char *peername) |
271 | final_free_player (player *pl) |
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272 | { |
252 | { |
273 | cs_write_string (&pl->socket, "goodbye", 8); |
253 | client *ns = new client (dup (fd), peername); |
274 | free_newsocket (&pl->socket); |
254 | ns->instantiate (); // effectively a nop right now |
275 | free_player (pl); |
255 | INVOKE_CLIENT (CONNECT, ns); |
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256 | return ns; |
276 | } |
257 | } |
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258 | |