1 | |
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2 | /* |
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3 | * static char *rcsid_sockets_c = |
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4 | * "$Id: lowlevel.C,v 1.2 2006/08/18 02:06:58 root Exp $"; |
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5 | */ |
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6 | |
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7 | /* |
1 | /* |
8 | CrossFire, A Multiplayer game for X-windows |
2 | CrossFire, A Multiplayer game for X-windows |
9 | |
3 | |
10 | Copyright (C) 1992 Frank Tore Johansen |
4 | Copyright (C) 1992 Frank Tore Johansen |
11 | |
5 | |
… | |
… | |
46 | |
40 | |
47 | #ifdef __linux__ |
41 | #ifdef __linux__ |
48 | # include <sys/types.h> |
42 | # include <sys/types.h> |
49 | # include <sys/socket.h> |
43 | # include <sys/socket.h> |
50 | # include <netinet/in.h> |
44 | # include <netinet/in.h> |
51 | # define TCP_HZ 1000 // sorry... |
45 | # define TCP_HZ 1000 // sorry... |
52 | # include <netinet/tcp.h> |
46 | # include <netinet/tcp.h> |
53 | #endif |
47 | #endif |
54 | |
48 | |
55 | // use a really low timeout, as it doesn't cost any bandwidth, and you can |
49 | // use a really low timeout, as it doesn't cost any bandwidth, and you can |
56 | // easily die in 20 seconds... |
50 | // easily die in 20 seconds... |
57 | #define SOCKET_TIMEOUT1 10 |
51 | #define SOCKET_TIMEOUT1 10 |
58 | #define SOCKET_TIMEOUT2 20 |
52 | #define SOCKET_TIMEOUT2 20 |
59 | |
53 | |
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54 | void |
60 | void Socket_Flush (NewSocket *ns) |
55 | Socket_Flush (NewSocket * ns) |
61 | { |
56 | { |
62 | #ifdef __linux__ |
57 | #ifdef __linux__ |
63 | // check time of last ack, and, if too old, kill connection |
58 | // check time of last ack, and, if too old, kill connection |
64 | struct tcp_info tcpi; |
59 | struct tcp_info tcpi; |
65 | socklen_t len = sizeof (tcpi); |
60 | socklen_t len = sizeof (tcpi); |
66 | |
61 | |
67 | if (!getsockopt (ns->fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
62 | if (!getsockopt (ns->fd, IPPROTO_TCP, TCP_INFO, &tcpi, &len) && len == sizeof (tcpi)) |
68 | { |
63 | { |
69 | unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent; |
64 | unsigned int diff = tcpi.tcpi_last_ack_recv - tcpi.tcpi_last_data_sent; |
70 | |
65 | |
71 | if (tcpi.tcpi_unacked |
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72 | && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s |
66 | if (tcpi.tcpi_unacked && SOCKET_TIMEOUT1 * TCP_HZ < diff && diff < 0x80000000UL // ack delayed for 20s |
73 | && SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s |
67 | && SOCKET_TIMEOUT2 * TCP_HZ < tcpi.tcpi_last_data_sent) // no data sent for 10s |
74 | { |
68 | { |
75 | LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", ns->fd, |
69 | LOG (llevDebug, "Connection on fd %d closed due to ack timeout (%u/%u/%u)\n", ns->fd, |
76 | (unsigned)tcpi.tcpi_last_ack_recv, (unsigned)tcpi.tcpi_last_data_sent, (unsigned)tcpi.tcpi_unacked); |
70 | (unsigned) tcpi.tcpi_last_ack_recv, (unsigned) tcpi.tcpi_last_data_sent, (unsigned) tcpi.tcpi_unacked); |
77 | ns->status = Ns_Dead; |
71 | ns->status = Ns_Dead; |
78 | } |
72 | } |
79 | } |
73 | } |
80 | |
74 | |
81 | int val; |
75 | int val; |
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76 | |
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77 | val = 0; |
82 | val = 0; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val)); |
78 | setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val)); |
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79 | val = 1; |
83 | val = 1; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val)); |
80 | setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val)); |
84 | #endif |
81 | #endif |
85 | } |
82 | } |
86 | |
83 | |
87 | /*********************************************************************** |
84 | /*********************************************************************** |
88 | * |
85 | * |
89 | * SockList functions/utilities |
86 | * SockList functions/utilities |
90 | * |
87 | * |
91 | **********************************************************************/ |
88 | **********************************************************************/ |
92 | |
89 | |
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90 | void |
93 | void SockList_Init(SockList *sl) |
91 | SockList_Init (SockList * sl) |
94 | { |
92 | { |
95 | sl->len=0; |
93 | sl->len = 0; |
96 | sl->buf=NULL; |
94 | sl->buf = NULL; |
97 | } |
95 | } |
98 | |
96 | |
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97 | void |
99 | void SockList_AddInt(SockList *sl, uint32 data) |
98 | SockList_AddInt (SockList * sl, uint32 data) |
100 | { |
99 | { |
101 | sl->buf[sl->len++]= (data>>24)&0xff; |
100 | sl->buf[sl->len++] = (data >> 24) & 0xff; |
102 | sl->buf[sl->len++]= (data>>16)&0xff; |
101 | sl->buf[sl->len++] = (data >> 16) & 0xff; |
103 | sl->buf[sl->len++]= (data>>8)&0xff; |
102 | sl->buf[sl->len++] = (data >> 8) & 0xff; |
104 | sl->buf[sl->len++] = data & 0xff; |
103 | sl->buf[sl->len++] = data & 0xff; |
105 | } |
104 | } |
106 | |
105 | |
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106 | void |
107 | void SockList_AddInt64(SockList *sl, uint64 data) |
107 | SockList_AddInt64 (SockList * sl, uint64 data) |
108 | { |
108 | { |
109 | sl->buf[sl->len++]= ( char )( (data>>56)&0xff ); |
109 | sl->buf[sl->len++] = (char) ((data >> 56) & 0xff); |
110 | sl->buf[sl->len++]= ( char )( (data>>48)&0xff ); |
110 | sl->buf[sl->len++] = (char) ((data >> 48) & 0xff); |
111 | sl->buf[sl->len++]= ( char )( (data>>40)&0xff ); |
111 | sl->buf[sl->len++] = (char) ((data >> 40) & 0xff); |
112 | sl->buf[sl->len++]= ( char )( (data>>32)&0xff ); |
112 | sl->buf[sl->len++] = (char) ((data >> 32) & 0xff); |
113 | |
113 | |
114 | sl->buf[sl->len++]= ( char )( (data>>24)&0xff ); |
114 | sl->buf[sl->len++] = (char) ((data >> 24) & 0xff); |
115 | sl->buf[sl->len++]= ( char )( (data>>16)&0xff ); |
115 | sl->buf[sl->len++] = (char) ((data >> 16) & 0xff); |
116 | sl->buf[sl->len++]= ( char )( (data>>8)&0xff ); |
116 | sl->buf[sl->len++] = (char) ((data >> 8) & 0xff); |
117 | sl->buf[sl->len++] =( char )( data & 0xff ); |
117 | sl->buf[sl->len++] = (char) (data & 0xff); |
118 | } |
118 | } |
119 | |
119 | |
120 | /* Basically does the reverse of SockList_AddInt, but on |
120 | /* Basically does the reverse of SockList_AddInt, but on |
121 | * strings instead. Same for the GetShort, but for 16 bits. |
121 | * strings instead. Same for the GetShort, but for 16 bits. |
122 | */ |
122 | */ |
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123 | int |
123 | int GetInt_String(unsigned char *data) |
124 | GetInt_String (unsigned char *data) |
124 | { |
125 | { |
125 | return ((data[0]<<24) + (data[1]<<16) + (data[2]<<8) + data[3]); |
126 | return ((data[0] << 24) + (data[1] << 16) + (data[2] << 8) + data[3]); |
126 | } |
127 | } |
127 | |
128 | |
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129 | short |
128 | short GetShort_String(unsigned char *data) { |
130 | GetShort_String (unsigned char *data) |
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131 | { |
129 | return ((data[0]<<8)+data[1]); |
132 | return ((data[0] << 8) + data[1]); |
130 | } |
133 | } |
131 | |
134 | |
132 | /****************************************************************************** |
135 | /****************************************************************************** |
133 | * |
136 | * |
134 | * Start of read routines. |
137 | * Start of read routines. |
… | |
… | |
140 | * we have a full packet, 0 if we have a partial packet. The only processing |
143 | * we have a full packet, 0 if we have a partial packet. The only processing |
141 | * we do is remove the intial size value. len (As passed) is the size of the |
144 | * we do is remove the intial size value. len (As passed) is the size of the |
142 | * buffer allocated in the socklist. We make the assumption the buffer is |
145 | * buffer allocated in the socklist. We make the assumption the buffer is |
143 | * at least 2 bytes long. |
146 | * at least 2 bytes long. |
144 | */ |
147 | */ |
145 | |
148 | |
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149 | int |
146 | int SockList_ReadPacket(int fd, SockList *sl, int len) |
150 | SockList_ReadPacket (int fd, SockList * sl, int len) |
147 | { |
151 | { |
148 | int stat,toread; |
152 | int stat, toread; |
149 | |
153 | |
150 | /* Sanity check - shouldn't happen */ |
154 | /* Sanity check - shouldn't happen */ |
151 | if (sl->len < 0) { |
155 | if (sl->len < 0) |
152 | abort(); |
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153 | } |
156 | { |
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157 | abort (); |
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158 | } |
154 | /* We already have a partial packet */ |
159 | /* We already have a partial packet */ |
155 | if (sl->len<2) { |
160 | if (sl->len < 2) |
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161 | { |
156 | #ifdef WIN32 /* ***WIN32 SockList_ReadPacket: change read() to recv() */ |
162 | #ifdef WIN32 /* ***WIN32 SockList_ReadPacket: change read() to recv() */ |
157 | |
163 | |
158 | stat=recv(fd, sl->buf + sl->len, 2-sl->len,0); |
164 | stat = recv (fd, sl->buf + sl->len, 2 - sl->len, 0); |
159 | |
165 | |
160 | #else |
166 | #else |
161 | do { |
167 | do |
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168 | { |
162 | stat=read(fd, sl->buf + sl->len, 2-sl->len); |
169 | stat = read (fd, sl->buf + sl->len, 2 - sl->len); |
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170 | } |
163 | } while ((stat==-1) && (errno==EINTR)); |
171 | while ((stat == -1) && (errno == EINTR)); |
164 | #endif |
172 | #endif |
165 | if (stat<0) { |
173 | if (stat < 0) |
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174 | { |
166 | /* In non blocking mode, EAGAIN is set when there is no |
175 | /* In non blocking mode, EAGAIN is set when there is no |
167 | * data available. |
176 | * data available. |
168 | */ |
177 | */ |
169 | #ifdef WIN32 /* ***WIN32 SockList_ReadPacket: error handling for win32 */ |
178 | #ifdef WIN32 /* ***WIN32 SockList_ReadPacket: error handling for win32 */ |
170 | if ((stat==-1) && WSAGetLastError() !=WSAEWOULDBLOCK) { |
179 | if ((stat == -1) && WSAGetLastError () != WSAEWOULDBLOCK) |
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180 | { |
171 | if(WSAGetLastError() == WSAECONNRESET) |
181 | if (WSAGetLastError () == WSAECONNRESET) |
172 | LOG(llevDebug,"Connection closed by client\n"); |
182 | LOG (llevDebug, "Connection closed by client\n"); |
173 | else |
183 | else |
174 | { |
184 | { |
175 | LOG(llevDebug,"ReadPacket got error %d, returning 0\n",WSAGetLastError()); |
185 | LOG (llevDebug, "ReadPacket got error %d, returning 0\n", WSAGetLastError ()); |
176 | } |
186 | } |
177 | return -1; /* kick this user! */ |
187 | return -1; /* kick this user! */ |
178 | } |
188 | } |
179 | #else |
189 | #else |
180 | if (errno != EAGAIN && errno !=EWOULDBLOCK) { |
190 | if (errno != EAGAIN && errno != EWOULDBLOCK) |
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191 | { |
181 | LOG(llevDebug, "ReadPacket got error %s, returning 0\n", strerror_local(errno)); |
192 | LOG (llevDebug, "ReadPacket got error %s, returning 0\n", strerror (errno)); |
182 | } |
193 | } |
183 | #endif |
194 | #endif |
184 | return 0; /*Error */ |
195 | return 0; /*Error */ |
185 | } |
196 | } |
186 | if (stat==0) return -1; |
197 | if (stat == 0) |
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198 | return -1; |
187 | sl->len += stat; |
199 | sl->len += stat; |
188 | #ifdef CS_LOGSTATS |
200 | #ifdef CS_LOGSTATS |
189 | cst_tot.ibytes += stat; |
201 | cst_tot.ibytes += stat; |
190 | cst_lst.ibytes += stat; |
202 | cst_lst.ibytes += stat; |
191 | #endif |
203 | #endif |
192 | if (stat<2) return 0; /* Still don't have a full packet */ |
204 | if (stat < 2) |
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205 | return 0; /* Still don't have a full packet */ |
193 | } |
206 | } |
194 | /* Figure out how much more data we need to read. Add 2 from the |
207 | /* Figure out how much more data we need to read. Add 2 from the |
195 | * end of this - size header information is not included. |
208 | * end of this - size header information is not included. |
196 | */ |
209 | */ |
197 | toread = 2+(sl->buf[0] << 8) + sl->buf[1] - sl->len; |
210 | toread = 2 + (sl->buf[0] << 8) + sl->buf[1] - sl->len; |
198 | if ((toread + sl->len) >= len) { |
211 | if ((toread + sl->len) >= len) |
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212 | { |
199 | LOG(llevError,"SockList_ReadPacket: Want to read more bytes than will fit in buffer (%d>=%d).\n", |
213 | LOG (llevError, "SockList_ReadPacket: Want to read more bytes than will fit in buffer (%d>=%d).\n", toread + sl->len, len); |
200 | toread + sl->len, len); |
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201 | /* Quick hack in case for 'oldsocketmode' input. If we are |
214 | /* Quick hack in case for 'oldsocketmode' input. If we are |
202 | * closing the socket anyways, then reading this extra 100 bytes |
215 | * closing the socket anyways, then reading this extra 100 bytes |
203 | * shouldn't hurt. |
216 | * shouldn't hurt. |
204 | */ |
217 | */ |
205 | #ifdef WIN32 /* ***win32 SockList_ReadPacket: change read() to recv() */ |
218 | #ifdef WIN32 /* ***win32 SockList_ReadPacket: change read() to recv() */ |
206 | recv(fd, sl->buf+2, 100, 0); |
219 | recv (fd, sl->buf + 2, 100, 0); |
207 | #else |
220 | #else |
208 | read(fd, sl->buf+2, 100); |
221 | read (fd, sl->buf + 2, 100); |
209 | #endif /* end win32 */ |
222 | #endif /* end win32 */ |
210 | |
223 | |
211 | /* return error so the socket is closed */ |
224 | /* return error so the socket is closed */ |
212 | return -1; |
225 | return -1; |
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226 | } |
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227 | do |
213 | } |
228 | { |
214 | do { |
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215 | #ifdef WIN32 /* ***win32 SockList_ReadPacket: change read() to recv() */ |
229 | #ifdef WIN32 /* ***win32 SockList_ReadPacket: change read() to recv() */ |
216 | stat = recv(fd, sl->buf+ sl->len, toread, 0); |
230 | stat = recv (fd, sl->buf + sl->len, toread, 0); |
217 | #else |
231 | #else |
218 | do { |
232 | do |
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233 | { |
219 | stat = read(fd, sl->buf+ sl->len, toread); |
234 | stat = read (fd, sl->buf + sl->len, toread); |
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235 | } |
220 | } while ((stat<0) && (errno==EINTR)); |
236 | while ((stat < 0) && (errno == EINTR)); |
221 | #endif |
237 | #endif |
222 | if (stat<0) { |
238 | if (stat < 0) |
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239 | { |
223 | |
240 | |
224 | #ifdef WIN32 /* ***win32 SockList_ReadPacket: change error handling for win32 */ |
241 | #ifdef WIN32 /* ***win32 SockList_ReadPacket: change error handling for win32 */ |
225 | if ((stat==-1) && WSAGetLastError() !=WSAEWOULDBLOCK) { |
242 | if ((stat == -1) && WSAGetLastError () != WSAEWOULDBLOCK) |
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243 | { |
226 | if(WSAGetLastError() == WSAECONNRESET) |
244 | if (WSAGetLastError () == WSAECONNRESET) |
227 | LOG(llevDebug,"Connection closed by client\n"); |
245 | LOG (llevDebug, "Connection closed by client\n"); |
228 | else |
246 | else |
229 | { |
247 | { |
230 | LOG(llevDebug,"ReadPacket got error %d, returning 0\n",WSAGetLastError()); |
248 | LOG (llevDebug, "ReadPacket got error %d, returning 0\n", WSAGetLastError ()); |
231 | } |
249 | } |
232 | return -1; /* kick this user! */ |
250 | return -1; /* kick this user! */ |
233 | } |
251 | } |
234 | #else |
252 | #else |
235 | if (errno != EAGAIN && errno !=EWOULDBLOCK) { |
253 | if (errno != EAGAIN && errno != EWOULDBLOCK) |
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254 | { |
236 | LOG(llevDebug, "ReadPacket got error %s, returning 0\n", strerror_local(errno)); |
255 | LOG (llevDebug, "ReadPacket got error %s, returning 0\n", strerror (errno)); |
237 | } |
256 | } |
238 | #endif |
257 | #endif |
239 | return 0; /*Error */ |
258 | return 0; /*Error */ |
240 | } |
259 | } |
241 | if (stat==0) return -1; |
260 | if (stat == 0) |
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261 | return -1; |
242 | sl->len += stat; |
262 | sl->len += stat; |
243 | #ifdef CS_LOGSTATS |
263 | #ifdef CS_LOGSTATS |
244 | cst_tot.ibytes += stat; |
264 | cst_tot.ibytes += stat; |
245 | cst_lst.ibytes += stat; |
265 | cst_lst.ibytes += stat; |
246 | #endif |
266 | #endif |
247 | toread -= stat; |
267 | toread -= stat; |
248 | if (toread==0) return 1; |
268 | if (toread == 0) |
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269 | return 1; |
249 | if (toread < 0) { |
270 | if (toread < 0) |
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271 | { |
250 | LOG(llevError,"SockList_ReadPacket: Read more bytes than desired.\n"); |
272 | LOG (llevError, "SockList_ReadPacket: Read more bytes than desired.\n"); |
251 | return 1; |
273 | return 1; |
252 | } |
274 | } |
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275 | } |
253 | } while (toread>0); |
276 | while (toread > 0); |
254 | return 0; |
277 | return 0; |
255 | } |
278 | } |
256 | |
279 | |
257 | /******************************************************************************* |
280 | /******************************************************************************* |
258 | * |
281 | * |
259 | * Start of write related routines. |
282 | * Start of write related routines. |
… | |
… | |
265 | * |
288 | * |
266 | * ns is the socket we are adding the data to, buf is the start of the |
289 | * ns is the socket we are adding the data to, buf is the start of the |
267 | * data, and len is the number of bytes to add. |
290 | * data, and len is the number of bytes to add. |
268 | */ |
291 | */ |
269 | |
292 | |
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293 | static void |
270 | static void add_to_buffer(NewSocket *ns, char *buf, int len) |
294 | add_to_buffer (NewSocket * ns, char *buf, int len) |
271 | { |
295 | { |
272 | int avail, end; |
296 | int avail, end; |
273 | |
297 | |
274 | if ((len+ns->outputbuffer.len)>SOCKETBUFSIZE) { |
298 | if ((len + ns->outputbuffer.len) > SOCKETBUFSIZE) |
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299 | { |
275 | LOG(llevDebug,"Socket on fd %d has overrun internal buffer - marking as dead\n", |
300 | LOG (llevDebug, "Socket on fd %d has overrun internal buffer - marking as dead\n", ns->fd); |
276 | ns->fd); |
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277 | ns->status = Ns_Dead; |
301 | ns->status = Ns_Dead; |
278 | return; |
302 | return; |
279 | } |
303 | } |
280 | |
304 | |
281 | /* data + end is where we start putting the new data. The last byte |
305 | /* data + end is where we start putting the new data. The last byte |
282 | * currently in use is actually data + end -1 |
306 | * currently in use is actually data + end -1 |
283 | */ |
307 | */ |
284 | |
308 | |
285 | end=ns->outputbuffer.start + ns->outputbuffer.len; |
309 | end = ns->outputbuffer.start + ns->outputbuffer.len; |
286 | /* The buffer is already in a wrapped state, so adjust end */ |
310 | /* The buffer is already in a wrapped state, so adjust end */ |
287 | if (end>=SOCKETBUFSIZE) end-=SOCKETBUFSIZE; |
311 | if (end >= SOCKETBUFSIZE) |
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312 | end -= SOCKETBUFSIZE; |
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313 | |
288 | avail=SOCKETBUFSIZE - end; |
314 | avail = SOCKETBUFSIZE - end; |
289 | |
315 | |
290 | /* We can all fit it behind the current data without wrapping */ |
316 | /* We can all fit it behind the current data without wrapping */ |
291 | if (avail >=len ) { |
317 | if (avail >= len) |
292 | memcpy(ns->outputbuffer.data + end, buf, len); |
318 | memcpy (ns->outputbuffer.data + end, buf, len); |
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319 | else |
293 | } |
320 | { |
294 | else { |
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295 | memcpy(ns->outputbuffer.data + end, buf, avail); |
321 | memcpy (ns->outputbuffer.data + end, buf, avail); |
296 | memcpy(ns->outputbuffer.data, buf+avail, len-avail); |
322 | memcpy (ns->outputbuffer.data, buf + avail, len - avail); |
297 | } |
323 | } |
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324 | |
298 | ns->outputbuffer.len += len; |
325 | ns->outputbuffer.len += len; |
299 | #if 0 |
326 | #if 0 |
300 | LOG(llevDebug,"Added %d to output buffer, total length now %d, start=%d\n", len, |
327 | LOG (llevDebug, "Added %d to output buffer, total length now %d, start=%d\n", len, ns->outputbuffer.len, ns->outputbuffer.start); |
301 | ns->outputbuffer.len, ns->outputbuffer.start); |
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302 | #endif |
328 | #endif |
303 | } |
329 | } |
304 | |
330 | |
305 | /** |
331 | /** |
306 | * Writes data to socket. |
332 | * Writes data to socket. |
307 | * |
333 | * |
308 | * When the socket is clear to write, and we have backlogged data, this |
334 | * When the socket is clear to write, and we have backlogged data, this |
309 | * is called to write it out. |
335 | * is called to write it out. |
310 | */ |
336 | */ |
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337 | void |
311 | void write_socket_buffer(NewSocket *ns) |
338 | write_socket_buffer (NewSocket * ns) |
312 | { |
339 | { |
313 | int amt, max; |
340 | int amt, max; |
314 | |
341 | |
315 | if (ns->outputbuffer.len==0) { |
342 | if (ns->outputbuffer.len == 0) |
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343 | { |
316 | LOG(llevDebug,"write_socket_buffer called when there is no data, fd=%d\n", |
344 | LOG (llevDebug, "write_socket_buffer called when there is no data, fd=%d\n", ns->fd); |
317 | ns->fd); |
345 | return; |
318 | return; |
346 | } |
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347 | |
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348 | do |
319 | } |
349 | { |
320 | |
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321 | do { |
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322 | max = SOCKETBUFSIZE - ns->outputbuffer.start; |
350 | max = SOCKETBUFSIZE - ns->outputbuffer.start; |
323 | if (ns->outputbuffer.len<max) max = ns->outputbuffer.len; |
351 | if (ns->outputbuffer.len < max) |
|
|
352 | max = ns->outputbuffer.len; |
324 | |
353 | |
325 | #ifdef WIN32 /* ***win32 write_socket_buffer: change write() to send() */ |
354 | #ifdef WIN32 /* ***win32 write_socket_buffer: change write() to send() */ |
326 | amt=send(ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max,0); |
355 | amt = send (ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max, 0); |
327 | #else |
356 | #else |
328 | do { |
357 | do |
|
|
358 | { |
329 | amt=write(ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max); |
359 | amt = write (ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max); |
|
|
360 | } |
330 | } while ((amt<0) && (errno==EINTR)); |
361 | while ((amt < 0) && (errno == EINTR)); |
331 | #endif |
362 | #endif |
332 | |
363 | |
333 | if (amt < 0) { /* We got an error */ |
364 | if (amt < 0) |
|
|
365 | { /* We got an error */ |
334 | |
366 | |
335 | #ifdef WIN32 /* ***win32 write_socket_buffer: change error handling */ |
367 | #ifdef WIN32 /* ***win32 write_socket_buffer: change error handling */ |
336 | if (amt == -1 && WSAGetLastError() !=WSAEWOULDBLOCK) { |
368 | if (amt == -1 && WSAGetLastError () != WSAEWOULDBLOCK) |
|
|
369 | { |
337 | LOG(llevError,"New socket write failed (wsb) (%d).\n", WSAGetLastError()); |
370 | LOG (llevError, "New socket write failed (wsb) (%d).\n", WSAGetLastError ()); |
338 | #else |
371 | #else |
339 | if (errno !=EWOULDBLOCK) { |
372 | if (errno != EWOULDBLOCK) |
340 | LOG(llevError,"New socket write failed (wsb) (%d: %s).\n", |
373 | { |
341 | errno, strerror_local(errno)); |
374 | LOG (llevError, "New socket write failed (wsb) (%d: %s).\n", errno, strerror (errno)); |
342 | #endif |
375 | #endif |
343 | ns->status=Ns_Dead; |
376 | ns->status = Ns_Dead; |
344 | return; |
377 | return; |
345 | } |
378 | } |
346 | else { /* EWOULDBLOCK */ |
379 | else |
|
|
380 | { /* EWOULDBLOCK */ |
347 | /* can't write it, so store it away. */ |
381 | /* can't write it, so store it away. */ |
348 | ns->can_write=0; |
382 | ns->can_write = 0; |
349 | return; |
383 | return; |
350 | } |
384 | } |
351 | } |
385 | } |
352 | ns->outputbuffer.start += amt; |
386 | ns->outputbuffer.start += amt; |
353 | /* wrap back to start of buffer */ |
387 | /* wrap back to start of buffer */ |
354 | if (ns->outputbuffer.start==SOCKETBUFSIZE) ns->outputbuffer.start=0; |
388 | if (ns->outputbuffer.start == SOCKETBUFSIZE) |
|
|
389 | ns->outputbuffer.start = 0; |
355 | ns->outputbuffer.len -= amt; |
390 | ns->outputbuffer.len -= amt; |
356 | #ifdef CS_LOGSTATS |
391 | #ifdef CS_LOGSTATS |
357 | cst_tot.obytes += amt; |
392 | cst_tot.obytes += amt; |
358 | cst_lst.obytes += amt; |
393 | cst_lst.obytes += amt; |
359 | #endif |
394 | #endif |
|
|
395 | } |
360 | } while (ns->outputbuffer.len>0); |
396 | while (ns->outputbuffer.len > 0); |
361 | } |
397 | } |
362 | |
398 | |
363 | /** |
399 | /** |
364 | * This writes data to the socket. - It is very low level - |
400 | * This writes data to the socket. - It is very low level - |
365 | * all we try and do is write out the data to the socket |
401 | * all we try and do is write out the data to the socket |
366 | * provided (ns). buf is the data to write, len is the number |
402 | * provided (ns). buf is the data to write, len is the number |
367 | * of bytes to write. IT doesn't return anything - rather, it |
403 | * of bytes to write. IT doesn't return anything - rather, it |
368 | * updates the ns structure if we get an error. |
404 | * updates the ns structure if we get an error. |
369 | */ |
405 | */ |
|
|
406 | void |
370 | void Write_To_Socket(NewSocket *ns, char *buf, int len) |
407 | Write_To_Socket (NewSocket * ns, char *buf, int len) |
371 | { |
408 | { |
372 | int amt=0; |
409 | int amt = 0; |
373 | char *pos=buf; |
410 | char *pos = buf; |
374 | |
411 | |
375 | if (ns->status == Ns_Dead || !buf) { |
412 | if (ns->status == Ns_Dead || !buf) |
|
|
413 | { |
376 | LOG(llevDebug,"Write_To_Socket called with dead socket\n"); |
414 | LOG (llevDebug, "Write_To_Socket called with dead socket\n"); |
377 | return; |
415 | return; |
378 | } |
416 | } |
379 | |
417 | |
380 | #ifndef __GNU__ /* This caused problems on Hurd */ |
418 | #ifndef __GNU__ /* This caused problems on Hurd */ |
381 | if (!ns->can_write) { |
419 | if (!ns->can_write) |
|
|
420 | { |
382 | add_to_buffer(ns, buf, len); |
421 | add_to_buffer (ns, buf, len); |
383 | return; |
422 | return; |
384 | } |
423 | } |
385 | #endif |
424 | #endif |
386 | /* If we manage to write more than we wanted, take it as a bonus */ |
425 | /* If we manage to write more than we wanted, take it as a bonus */ |
387 | while (len>0) { |
426 | while (len > 0) |
|
|
427 | { |
388 | |
428 | |
389 | #ifdef WIN32 /* ***win32 Write_To_Socket: change write() to send() */ |
429 | #ifdef WIN32 /* ***win32 Write_To_Socket: change write() to send() */ |
390 | amt=send(ns->fd, pos, len,0); |
430 | amt = send (ns->fd, pos, len, 0); |
391 | #else |
431 | #else |
392 | do { |
432 | do |
|
|
433 | { |
393 | amt=write(ns->fd, pos, len); |
434 | amt = write (ns->fd, pos, len); |
|
|
435 | } |
394 | } while ((amt<0) && (errno==EINTR)); |
436 | while ((amt < 0) && (errno == EINTR)); |
395 | #endif |
437 | #endif |
396 | |
438 | |
397 | if (amt < 0) { /* We got an error */ |
439 | if (amt < 0) |
|
|
440 | { /* We got an error */ |
398 | #ifdef WIN32 /* ***win32 Write_To_Socket: change error handling */ |
441 | #ifdef WIN32 /* ***win32 Write_To_Socket: change error handling */ |
399 | if (amt == -1 && WSAGetLastError() !=WSAEWOULDBLOCK) { |
442 | if (amt == -1 && WSAGetLastError () != WSAEWOULDBLOCK) |
|
|
443 | { |
400 | LOG(llevError,"New socket write failed WTS (%d).\n",WSAGetLastError()); |
444 | LOG (llevError, "New socket write failed WTS (%d).\n", WSAGetLastError ()); |
401 | #else |
445 | #else |
402 | if (errno !=EWOULDBLOCK) { |
446 | if (errno != EWOULDBLOCK) |
|
|
447 | { |
403 | LOG(llevError,"New socket write failed WTS (%d: %s).\n", /* ---WIN32 */ |
448 | LOG (llevError, "New socket write failed WTS (%d: %s).\n", /* ---WIN32 */ |
404 | errno, strerror_local(errno)); |
449 | errno, strerror (errno)); |
405 | #endif |
450 | #endif |
406 | ns->status=Ns_Dead; |
451 | ns->status = Ns_Dead; |
407 | return; |
452 | return; |
408 | } |
453 | } |
409 | else { /* EWOULDBLOCK */ |
454 | else |
|
|
455 | { /* EWOULDBLOCK */ |
410 | /* can't write it, so store it away. */ |
456 | /* can't write it, so store it away. */ |
411 | add_to_buffer(ns, pos, len); |
457 | add_to_buffer (ns, pos, len); |
412 | ns->can_write=0; |
458 | ns->can_write = 0; |
413 | return; |
459 | return; |
414 | } |
460 | } |
415 | } |
461 | } |
416 | /* amt gets set to 0 above in blocking code, so we do this as |
462 | /* amt gets set to 0 above in blocking code, so we do this as |
417 | * an else if to make sure we don't reprocess it. |
463 | * an else if to make sure we don't reprocess it. |
418 | */ |
464 | */ |
419 | else if (amt==0) { |
465 | else if (amt == 0) |
|
|
466 | { |
420 | LOG(llevError,"Write_To_Socket: No data written out.\n"); |
467 | LOG (llevError, "Write_To_Socket: No data written out.\n"); |
421 | } |
468 | } |
422 | len -= amt; |
469 | len -= amt; |
423 | pos += amt; |
470 | pos += amt; |
424 | #ifdef CS_LOGSTATS |
471 | #ifdef CS_LOGSTATS |
425 | cst_tot.obytes += amt; |
472 | cst_tot.obytes += amt; |
426 | cst_lst.obytes += amt; |
473 | cst_lst.obytes += amt; |
427 | #endif |
474 | #endif |
428 | } |
475 | } |
429 | } |
476 | } |
430 | |
477 | |
431 | |
478 | |
432 | /** |
479 | /** |
433 | * Takes a string of data, and writes it out to the socket. A very handy |
480 | * Takes a string of data, and writes it out to the socket. A very handy |
434 | * shortcut function. |
481 | * shortcut function. |
435 | */ |
482 | */ |
|
|
483 | void |
436 | void cs_write_string(NewSocket *ns, const char *buf, int len) |
484 | cs_write_string (NewSocket * ns, const char *buf, int len) |
437 | { |
485 | { |
438 | SockList sl; |
486 | SockList sl; |
439 | |
487 | |
440 | sl.len = len; |
488 | sl.len = len; |
441 | sl.buf = (unsigned char*)buf; |
489 | sl.buf = (unsigned char *) buf; |
442 | Send_With_Handling(ns, &sl); |
490 | Send_With_Handling (ns, &sl); |
443 | } |
491 | } |
444 | |
492 | |
445 | |
493 | |
446 | /** |
494 | /** |
447 | * Calls Write_To_Socket to send data to the client. |
495 | * Calls Write_To_Socket to send data to the client. |
448 | * |
496 | * |
449 | * The only difference in this function is that we take a SockList |
497 | * The only difference in this function is that we take a SockList |
450 | *, and we prepend the length information. |
498 | *, and we prepend the length information. |
451 | */ |
499 | */ |
|
|
500 | void |
452 | void Send_With_Handling(NewSocket *ns,SockList *msg) |
501 | Send_With_Handling (NewSocket * ns, SockList * msg) |
453 | { |
502 | { |
454 | unsigned char sbuf[4]; |
503 | unsigned char sbuf[4]; |
455 | |
504 | |
456 | if (ns->status == Ns_Dead || !msg) |
505 | if (ns->status == Ns_Dead || !msg) |
457 | return; |
506 | return; |
458 | |
507 | |
459 | if (msg->len >= MAXSOCKBUF) { |
508 | if (msg->len >= MAXSOCKBUF) |
|
|
509 | { |
460 | LOG(llevError,"Trying to send a buffer beyond properly size, len =%d\n", |
510 | LOG (llevError, "Trying to send a buffer beyond properly size, len =%d\n", msg->len); |
461 | msg->len); |
|
|
462 | /* Almost certainly we've overflowed a buffer, so quite now to make |
511 | /* Almost certainly we've overflowed a buffer, so quite now to make |
463 | * it easier to debug. |
512 | * it easier to debug. |
464 | */ |
513 | */ |
465 | abort(); |
514 | abort (); |
466 | } |
515 | } |
467 | sbuf[0] = ((uint32)(msg->len) >> 8) & 0xFF; |
516 | sbuf[0] = ((uint32) (msg->len) >> 8) & 0xFF; |
468 | sbuf[1] = ((uint32)(msg->len)) & 0xFF; |
517 | sbuf[1] = ((uint32) (msg->len)) & 0xFF; |
469 | if (ns->status != Ns_Old) |
518 | if (ns->status != Ns_Old) |
470 | Write_To_Socket(ns, (char *) sbuf, 2); |
519 | Write_To_Socket (ns, (char *) sbuf, 2); |
471 | Write_To_Socket(ns, (char*)msg->buf, msg->len); |
520 | Write_To_Socket (ns, (char *) msg->buf, msg->len); |
472 | } |
521 | } |
473 | |
522 | |
474 | /** |
523 | /** |
475 | * Takes a string of data, and writes it out to the socket. A very handy |
524 | * Takes a string of data, and writes it out to the socket. A very handy |
476 | * shortcut function. |
525 | * shortcut function. |
477 | */ |
526 | */ |
|
|
527 | void |
478 | void Write_String_To_Socket(NewSocket *ns, char *buf, int len) |
528 | Write_String_To_Socket (NewSocket * ns, char *buf, int len) |
479 | { |
529 | { |
480 | SockList sl; |
530 | SockList sl; |
481 | |
531 | |
482 | sl.len = len; |
532 | sl.len = len; |
483 | sl.buf = (unsigned char*) buf; |
533 | sl.buf = (unsigned char *) buf; |
484 | Send_With_Handling(ns, &sl); |
534 | Send_With_Handling (ns, &sl); |
485 | } |
535 | } |
486 | |
536 | |
487 | |
537 | |
488 | /****************************************************************************** |
538 | /****************************************************************************** |
489 | * |
539 | * |
490 | * statistics logging functions. |
540 | * statistics logging functions. |
491 | * |
541 | * |
492 | ******************************************************************************/ |
542 | ******************************************************************************/ |
493 | |
543 | |
494 | #ifdef CS_LOGSTATS |
544 | #ifdef CS_LOGSTATS |
|
|
545 | |
495 | /* cst_tot is for the life of the server, cst_last is for the last series of |
546 | /* cst_tot is for the life of the server, cst_last is for the last series of |
496 | * stats |
547 | * stats |
497 | */ |
548 | */ |
498 | CS_Stats cst_tot, cst_lst; |
549 | CS_Stats cst_tot, cst_lst; |
499 | |
550 | |
500 | /** |
551 | /** |
501 | * Writes out the gathered stats. We clear cst_lst. |
552 | * Writes out the gathered stats. We clear cst_lst. |
502 | */ |
553 | */ |
|
|
554 | void |
503 | void write_cs_stats(void) |
555 | write_cs_stats (void) |
504 | { |
556 | { |
505 | time_t now=time(NULL); |
557 | time_t now = time (NULL); |
506 | |
558 | |
507 | /* If no connections recently, don't both to log anything */ |
559 | /* If no connections recently, don't both to log anything */ |
508 | if (cst_lst.ibytes==0 && cst_lst.obytes==0) return; |
560 | if (cst_lst.ibytes == 0 && cst_lst.obytes == 0) |
|
|
561 | return; |
509 | |
562 | |
510 | /* CSSTAT is put in so scripts can easily find the line */ |
563 | /* CSSTAT is put in so scripts can easily find the line */ |
511 | LOG(llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n", |
564 | LOG (llevInfo, "CSSTAT: %.16s tot %d %d %d %d inc %d %d %d %d\n", |
512 | ctime(&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn, |
565 | ctime (&now), cst_tot.ibytes, cst_tot.obytes, cst_tot.max_conn, |
513 | now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, |
566 | now - cst_tot.time_start, cst_lst.ibytes, cst_lst.obytes, cst_lst.max_conn, now - cst_lst.time_start); |
514 | cst_lst.max_conn, now - cst_lst.time_start); |
|
|
515 | cst_lst.ibytes=0; |
567 | cst_lst.ibytes = 0; |
516 | cst_lst.obytes=0; |
568 | cst_lst.obytes = 0; |
517 | cst_lst.max_conn=socket_info.nconns; |
569 | cst_lst.max_conn = socket_info.nconns; |
518 | cst_lst.time_start=now; |
570 | cst_lst.time_start = now; |
519 | } |
571 | } |
520 | #endif |
572 | #endif |