… | |
… | |
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 | |
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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> |
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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 | sockvec 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 | */ |
61 | void |
57 | client::client (int fd, const char *peername) |
62 | InitConnection (NewSocket *ns, const char *from_ip) |
58 | : fd (fd), host (strdup (peername)), |
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59 | socket_ev (this, &client::socket_cb), |
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60 | cmd_ev (this, &client::cmd_cb), |
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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 */ |
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67 | int oldbufsize; |
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68 | int buflen = sizeof (int); |
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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)); |
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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); |
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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 | |
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80 | { |
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81 | int val = 1; |
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82 | |
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83 | if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &val, sizeof (val))) |
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84 | LOG (llevError, "TCP_NODELAY: %s\n", strerror (errno)); |
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85 | } |
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86 | |
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87 | #ifdef __linux__ |
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88 | { |
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89 | int val; |
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90 | |
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91 | // set some very aggressive keepalive parameters |
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92 | val = 10; |
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93 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof (val))) |
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94 | LOG (llevError, "TCP_KEEPIDLE: %s\n", strerror (errno)); |
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95 | |
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96 | val = 5; |
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97 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof (val))) |
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98 | LOG (llevError, "TCP_KEEPCNT: %s\n", strerror (errno)); |
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99 | |
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100 | val = 1; |
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101 | if (setsockopt (fd, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof (val))) |
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102 | LOG (llevError, "TCP_KEEPINTVL: %s\n", strerror (errno)); |
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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) |
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112 | LOG (llevError, "InitConnection: Error on fcntl.\n"); |
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113 | |
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114 | if (getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen) == -1) |
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115 | oldbufsize = 0; |
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116 | |
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117 | if (oldbufsize < bufsize) |
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118 | if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &bufsize, sizeof (&bufsize))) |
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119 | LOG (llevError, "InitConnection: setsockopt unable to set output buf size to %d\n", bufsize); |
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120 | |
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121 | buflen = sizeof (oldbufsize); |
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122 | getsockopt (fd, SOL_SOCKET, SO_SNDBUF, (char *) &oldbufsize, (socklen_t *) & buflen); |
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123 | } |
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124 | |
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125 | state = ST_SETUP; |
92 | ns->mapmode = Map0Cmd; |
126 | mapmode = Map0Cmd; |
93 | ns->darkness = 1; |
127 | darkness = 1; |
94 | ns->status = Ns_Add; |
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95 | ns->mapx = 11; |
128 | mapx = 11; |
96 | ns->mapy = 11; |
129 | mapy = 11; |
97 | ns->newmapcmd = 0; |
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98 | ns->itemcmd = 1; /* Default is version item1 command */ |
130 | itemcmd = 1; /* Default is version item1 command */ |
99 | ns->ext_mapinfos = 0; /*extendedmapinfo datas */ |
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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 | |
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 |
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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 | ns->inbuf.buf = (unsigned char *) malloc (sizeof (unsigned char) * MAXSOCKBUF); |
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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->inbuf.buf, 0, sizeof (unsigned char) * MAXSOCKBUF); |
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122 | memset (&ns->lastmap, 0, sizeof (struct Map)); |
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123 | memset (ns->faces_sent, 0, ns->faces_sent_len * sizeof (*ns->faces_sent)); |
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124 | memset (&ns->anims_sent, 0, sizeof (ns->anims_sent)); |
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125 | memset (&ns->stats, 0, sizeof (struct statsinfo)); |
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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); |
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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; |
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141 | ns->buggy_mapscroll = 0; |
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142 | |
149 | |
143 | ns->sent_scroll = 0; |
150 | // initialisation done, kick it! |
144 | ns->host = strdup_local (from_ip); |
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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++; |
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160 | if (socket_info.nconns > cst_tot.max_conn) cst_tot.max_conn = socket_info.nconns; |
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161 | if (socket_info.nconns > cst_lst.max_conn) cst_lst.max_conn = socket_info.nconns; |
154 | #endif |
162 | #endif |
155 | } |
163 | } |
156 | |
164 | |
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165 | client::~client () |
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166 | { |
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167 | sockvec::iterator i = find (clients.begin (), clients.end (), this); |
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168 | if (i != clients.end ()) |
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169 | clients.erase (i); |
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170 | |
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171 | sfree<uint8> (faces_sent, nrofpixmaps); |
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172 | free (stats.range); |
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173 | free (stats.title); |
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174 | free (host); |
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175 | } |
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176 | |
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177 | void |
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178 | client::do_destroy () |
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179 | { |
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180 | attachable::do_destroy (); |
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181 | |
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182 | if (pl) |
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183 | pl->disconnect (); |
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184 | |
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185 | if (fd >= 0) |
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186 | close (fd); |
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187 | |
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188 | state = ST_DEAD; |
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189 | |
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190 | socket_ev.suspend (); |
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191 | cmd_ev.suspend (); |
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192 | |
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193 | // socket now longer references us |
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194 | refcnt_dec (); |
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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. */ |
159 | void |
198 | void |
160 | init_ericserver (void) |
199 | init_ericserver (void) |
161 | { |
200 | { |
162 | struct sockaddr_in insock; |
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163 | struct protoent *protox; |
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164 | struct linger linger_opt; |
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165 | |
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166 | socket_info.max_filedescriptor = sysconf (_SC_OPEN_MAX); |
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167 | |
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168 | socket_info.timeout.tv_sec = 0; |
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169 | socket_info.timeout.tv_usec = 0; |
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170 | socket_info.nconns = 0; |
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171 | |
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172 | #ifdef CS_LOGSTATS |
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173 | memset (&cst_tot, 0, sizeof (CS_Stats)); |
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174 | memset (&cst_lst, 0, sizeof (CS_Stats)); |
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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 |
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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; |
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181 | init_sockets = (NewSocket *) malloc (sizeof (NewSocket)); |
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182 | init_sockets[0].faces_sent = NULL; /* unused */ |
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183 | socket_info.allocated_sockets = 1; |
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184 | |
205 | |
185 | protox = getprotobyname ("tcp"); |
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186 | if (protox == NULL) |
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187 | { |
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188 | LOG (llevError, "init_ericserver: Error getting protox\n"); |
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189 | return; |
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190 | } |
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191 | |
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192 | init_sockets[0].fd = socket (PF_INET, SOCK_STREAM, protox->p_proto); |
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193 | if (init_sockets[0].fd == -1) |
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194 | { |
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195 | LOG (llevError, "Cannot create socket: %s\n", strerror (errno)); |
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196 | exit (-1); |
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197 | } |
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198 | |
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199 | insock.sin_family = AF_INET; |
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200 | insock.sin_port = htons (settings.csport); |
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201 | insock.sin_addr.s_addr = htonl (INADDR_ANY); |
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202 | |
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203 | linger_opt.l_onoff = 0; |
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204 | linger_opt.l_linger = 0; |
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205 | if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_LINGER, (char *) &linger_opt, sizeof (struct linger))) |
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206 | LOG (llevError, "Cannot setsockopt(SO_LINGER): %s\n", strerror (errno)); |
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207 | |
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208 | { |
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209 | int tmp = 1; |
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210 | |
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211 | if (setsockopt (init_sockets[0].fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof (tmp))) |
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212 | LOG (llevError, "Cannot setsockopt(SO_REUSEADDR): %s\n", strerror (errno)); |
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213 | } |
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214 | |
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215 | if (bind (init_sockets[0].fd, (struct sockaddr *) &insock, sizeof (insock)) == (-1)) |
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216 | { |
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217 | LOG (llevError, "Cannot bind socket to port %d: %s\n", ntohs (insock.sin_port), strerror (errno)); |
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218 | close (init_sockets[0].fd); |
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219 | exit (-1); |
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220 | } |
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221 | |
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222 | if (listen (init_sockets[0].fd, 5) == (-1)) |
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223 | { |
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224 | LOG (llevError, "Cannot listen on socket: %s\n", strerror (errno)); |
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225 | close (init_sockets[0].fd); |
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226 | exit (-1); |
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227 | } |
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228 | |
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229 | init_sockets[0].status = Ns_Add; |
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230 | read_client_images (); |
206 | read_client_images (); |
231 | } |
207 | } |
232 | |
208 | |
233 | |
209 | |
234 | /******************************************************************************* |
210 | /******************************************************************************* |
… | |
… | |
241 | void |
217 | void |
242 | free_all_newserver (void) |
218 | free_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); |
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247 | } |
222 | } |
248 | |
223 | |
249 | /** |
224 | client * |
250 | * Frees a socket. |
225 | client::create (int fd, const char *peername) |
251 | * Basically, all we need to do here is free all data structures that |
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252 | * might be associated with the socket. It is up to the caller to |
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253 | * update the list |
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254 | */ |
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255 | |
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256 | void |
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257 | free_newsocket (NewSocket *ns) |
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258 | { |
226 | { |
259 | close (ns->fd); |
227 | if (checkbanned (NULL, peername)) |
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228 | { |
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229 | LOG (llevInfo, "Banned host tried to connect: [%s]\n", peername); |
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230 | return 0; |
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231 | } |
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232 | else |
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233 | { |
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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); |
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263 | |
237 | |
264 | if (ns->stats.title) |
238 | INVOKE_CLIENT (CONNECT, ns); |
265 | free (ns->stats.title); |
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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. */ |
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272 | void |
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273 | final_free_player (player *pl) |
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274 | { |
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275 | cs_write_string (&pl->socket, "goodbye", 8); |
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276 | free_newsocket (&pl->socket); |
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277 | free_player (pl); |
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278 | } |
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