| 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 1.5 2006/09/10 13:43:33 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 | |
| … | |
… | |
| 78 | } |
72 | } |
| 79 | } |
73 | } |
| 80 | |
74 | |
| 81 | int val; |
75 | int val; |
| 82 | |
76 | |
| 83 | val = 0; |
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| 84 | setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val)); |
77 | val = 0; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val)); |
| 85 | val = 1; |
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| 86 | setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val)); |
78 | val = 1; setsockopt (ns->fd, IPPROTO_TCP, TCP_CORK, &val, sizeof (val)); |
| 87 | #endif |
79 | #endif |
| 88 | } |
80 | } |
| 89 | |
81 | |
| 90 | /*********************************************************************** |
82 | /*********************************************************************** |
| 91 | * |
83 | * |
| 92 | * SockList functions/utilities |
84 | * SockList functions/utilities |
| 93 | * |
85 | * |
| 94 | **********************************************************************/ |
86 | **********************************************************************/ |
| 95 | |
87 | |
| 96 | void |
88 | SockList &SockList::operator <<(const data8 &v) |
| 97 | SockList_Init (SockList * sl) |
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| 98 | { |
89 | { |
| 99 | sl->len = 0; |
90 | *this << uint8 (v.len); |
| 100 | sl->buf = NULL; |
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| 101 | } |
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| 102 | |
91 | |
| 103 | void |
92 | memcpy (buf + len, v.data, v.len); |
| 104 | SockList_AddInt (SockList * sl, uint32 data) |
93 | len += v.len; |
| 105 | { |
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| 106 | sl->buf[sl->len++] = (data >> 24) & 0xff; |
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| 107 | sl->buf[sl->len++] = (data >> 16) & 0xff; |
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| 108 | sl->buf[sl->len++] = (data >> 8) & 0xff; |
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| 109 | sl->buf[sl->len++] = data & 0xff; |
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| 110 | } |
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| 111 | |
94 | |
| 112 | void |
95 | return *this; |
| 113 | SockList_AddInt64 (SockList * sl, uint64 data) |
96 | } |
| 114 | { |
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| 115 | sl->buf[sl->len++] = (char) ((data >> 56) & 0xff); |
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| 116 | sl->buf[sl->len++] = (char) ((data >> 48) & 0xff); |
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| 117 | sl->buf[sl->len++] = (char) ((data >> 40) & 0xff); |
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| 118 | sl->buf[sl->len++] = (char) ((data >> 32) & 0xff); |
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| 119 | |
97 | |
| 120 | sl->buf[sl->len++] = (char) ((data >> 24) & 0xff); |
98 | SockList &SockList::operator <<(const data16 &v) |
| 121 | sl->buf[sl->len++] = (char) ((data >> 16) & 0xff); |
99 | { |
| 122 | sl->buf[sl->len++] = (char) ((data >> 8) & 0xff); |
100 | *this << uint16 (v.len); |
| 123 | sl->buf[sl->len++] = (char) (data & 0xff); |
101 | |
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102 | memcpy (buf + len, v.data, v.len); |
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103 | len += v.len; |
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104 | |
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105 | return *this; |
| 124 | } |
106 | } |
| 125 | |
107 | |
| 126 | /* Basically does the reverse of SockList_AddInt, but on |
108 | /* Basically does the reverse of SockList_AddInt, but on |
| 127 | * strings instead. Same for the GetShort, but for 16 bits. |
109 | * strings instead. Same for the GetShort, but for 16 bits. |
| 128 | */ |
110 | */ |
| … | |
… | |
| 163 | abort (); |
145 | abort (); |
| 164 | } |
146 | } |
| 165 | /* We already have a partial packet */ |
147 | /* We already have a partial packet */ |
| 166 | if (sl->len < 2) |
148 | if (sl->len < 2) |
| 167 | { |
149 | { |
| 168 | #ifdef WIN32 /* ***WIN32 SockList_ReadPacket: change read() to recv() */ |
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| 169 | |
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| 170 | stat = recv (fd, sl->buf + sl->len, 2 - sl->len, 0); |
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| 171 | |
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| 172 | #else |
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| 173 | do |
150 | do |
| 174 | { |
151 | { |
| 175 | stat = read (fd, sl->buf + sl->len, 2 - sl->len); |
152 | stat = read (fd, sl->buf + sl->len, 2 - sl->len); |
| 176 | } |
153 | } |
| 177 | while ((stat == -1) && (errno == EINTR)); |
154 | while ((stat == -1) && (errno == EINTR)); |
| 178 | #endif |
155 | |
| 179 | if (stat < 0) |
156 | if (stat < 0) |
| 180 | { |
157 | { |
| 181 | /* In non blocking mode, EAGAIN is set when there is no |
158 | /* In non blocking mode, EAGAIN is set when there is no |
| 182 | * data available. |
159 | * data available. |
| 183 | */ |
160 | */ |
| 184 | #ifdef WIN32 /* ***WIN32 SockList_ReadPacket: error handling for win32 */ |
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| 185 | if ((stat == -1) && WSAGetLastError () != WSAEWOULDBLOCK) |
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| 186 | { |
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| 187 | if (WSAGetLastError () == WSAECONNRESET) |
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| 188 | LOG (llevDebug, "Connection closed by client\n"); |
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| 189 | else |
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| 190 | { |
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| 191 | LOG (llevDebug, "ReadPacket got error %d, returning 0\n", WSAGetLastError ()); |
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| 192 | } |
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| 193 | return -1; /* kick this user! */ |
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| 194 | } |
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| 195 | #else |
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| 196 | if (errno != EAGAIN && errno != EWOULDBLOCK) |
161 | if (errno != EAGAIN && errno != EWOULDBLOCK) |
| 197 | { |
162 | { |
| 198 | LOG (llevDebug, "ReadPacket got error %s, returning 0\n", strerror (errno)); |
163 | LOG (llevDebug, "ReadPacket got error %s, returning 0\n", strerror (errno)); |
| 199 | } |
164 | } |
| 200 | #endif |
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| 201 | return 0; /*Error */ |
165 | return 0; /*Error */ |
| 202 | } |
166 | } |
| 203 | if (stat == 0) |
167 | if (stat == 0) |
| 204 | return -1; |
168 | return -1; |
| 205 | sl->len += stat; |
169 | sl->len += stat; |
| … | |
… | |
| 219 | LOG (llevError, "SockList_ReadPacket: Want to read more bytes than will fit in buffer (%d>=%d).\n", toread + sl->len, len); |
183 | LOG (llevError, "SockList_ReadPacket: Want to read more bytes than will fit in buffer (%d>=%d).\n", toread + sl->len, len); |
| 220 | /* Quick hack in case for 'oldsocketmode' input. If we are |
184 | /* Quick hack in case for 'oldsocketmode' input. If we are |
| 221 | * closing the socket anyways, then reading this extra 100 bytes |
185 | * closing the socket anyways, then reading this extra 100 bytes |
| 222 | * shouldn't hurt. |
186 | * shouldn't hurt. |
| 223 | */ |
187 | */ |
| 224 | #ifdef WIN32 /* ***win32 SockList_ReadPacket: change read() to recv() */ |
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| 225 | recv (fd, sl->buf + 2, 100, 0); |
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| 226 | #else |
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| 227 | read (fd, sl->buf + 2, 100); |
188 | read (fd, sl->buf + 2, 100); |
| 228 | #endif /* end win32 */ |
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| 229 | |
189 | |
| 230 | /* return error so the socket is closed */ |
190 | /* return error so the socket is closed */ |
| 231 | return -1; |
191 | return -1; |
| 232 | } |
192 | } |
| 233 | do |
193 | do |
| 234 | { |
194 | { |
| 235 | #ifdef WIN32 /* ***win32 SockList_ReadPacket: change read() to recv() */ |
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| 236 | stat = recv (fd, sl->buf + sl->len, toread, 0); |
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| 237 | #else |
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| 238 | do |
195 | do |
| 239 | { |
196 | { |
| 240 | stat = read (fd, sl->buf + sl->len, toread); |
197 | stat = read (fd, sl->buf + sl->len, toread); |
| 241 | } |
198 | } |
| 242 | while ((stat < 0) && (errno == EINTR)); |
199 | while ((stat < 0) && (errno == EINTR)); |
| 243 | #endif |
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| 244 | if (stat < 0) |
200 | if (stat < 0) |
| 245 | { |
201 | { |
| 246 | |
202 | |
| 247 | #ifdef WIN32 /* ***win32 SockList_ReadPacket: change error handling for win32 */ |
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| 248 | if ((stat == -1) && WSAGetLastError () != WSAEWOULDBLOCK) |
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| 249 | { |
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| 250 | if (WSAGetLastError () == WSAECONNRESET) |
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| 251 | LOG (llevDebug, "Connection closed by client\n"); |
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| 252 | else |
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| 253 | { |
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| 254 | LOG (llevDebug, "ReadPacket got error %d, returning 0\n", WSAGetLastError ()); |
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| 255 | } |
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| 256 | return -1; /* kick this user! */ |
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| 257 | } |
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| 258 | #else |
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| 259 | if (errno != EAGAIN && errno != EWOULDBLOCK) |
203 | if (errno != EAGAIN && errno != EWOULDBLOCK) |
| 260 | { |
204 | { |
| 261 | LOG (llevDebug, "ReadPacket got error %s, returning 0\n", strerror (errno)); |
205 | LOG (llevDebug, "ReadPacket got error %s, returning 0\n", strerror (errno)); |
| 262 | } |
206 | } |
| 263 | #endif |
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| 264 | return 0; /*Error */ |
207 | return 0; /*Error */ |
| 265 | } |
208 | } |
| 266 | if (stat == 0) |
209 | if (stat == 0) |
| 267 | return -1; |
210 | return -1; |
| 268 | sl->len += stat; |
211 | sl->len += stat; |
| … | |
… | |
| 314 | |
257 | |
| 315 | end = ns->outputbuffer.start + ns->outputbuffer.len; |
258 | end = ns->outputbuffer.start + ns->outputbuffer.len; |
| 316 | /* The buffer is already in a wrapped state, so adjust end */ |
259 | /* The buffer is already in a wrapped state, so adjust end */ |
| 317 | if (end >= SOCKETBUFSIZE) |
260 | if (end >= SOCKETBUFSIZE) |
| 318 | end -= SOCKETBUFSIZE; |
261 | end -= SOCKETBUFSIZE; |
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262 | |
| 319 | avail = SOCKETBUFSIZE - end; |
263 | avail = SOCKETBUFSIZE - end; |
| 320 | |
264 | |
| 321 | /* We can all fit it behind the current data without wrapping */ |
265 | /* We can all fit it behind the current data without wrapping */ |
| 322 | if (avail >= len) |
266 | if (avail >= len) |
| 323 | { |
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| 324 | memcpy (ns->outputbuffer.data + end, buf, len); |
267 | memcpy (ns->outputbuffer.data + end, buf, len); |
| 325 | } |
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| 326 | else |
268 | else |
| 327 | { |
269 | { |
| 328 | memcpy (ns->outputbuffer.data + end, buf, avail); |
270 | memcpy (ns->outputbuffer.data + end, buf, avail); |
| 329 | memcpy (ns->outputbuffer.data, buf + avail, len - avail); |
271 | memcpy (ns->outputbuffer.data, buf + avail, len - avail); |
| 330 | } |
272 | } |
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273 | |
| 331 | ns->outputbuffer.len += len; |
274 | ns->outputbuffer.len += len; |
| 332 | #if 0 |
275 | #if 0 |
| 333 | LOG (llevDebug, "Added %d to output buffer, total length now %d, start=%d\n", len, ns->outputbuffer.len, ns->outputbuffer.start); |
276 | LOG (llevDebug, "Added %d to output buffer, total length now %d, start=%d\n", len, ns->outputbuffer.len, ns->outputbuffer.start); |
| 334 | #endif |
277 | #endif |
| 335 | } |
278 | } |
| … | |
… | |
| 355 | { |
298 | { |
| 356 | max = SOCKETBUFSIZE - ns->outputbuffer.start; |
299 | max = SOCKETBUFSIZE - ns->outputbuffer.start; |
| 357 | if (ns->outputbuffer.len < max) |
300 | if (ns->outputbuffer.len < max) |
| 358 | max = ns->outputbuffer.len; |
301 | max = ns->outputbuffer.len; |
| 359 | |
302 | |
| 360 | #ifdef WIN32 /* ***win32 write_socket_buffer: change write() to send() */ |
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| 361 | amt = send (ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max, 0); |
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| 362 | #else |
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| 363 | do |
303 | do |
| 364 | { |
304 | { |
| 365 | amt = write (ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max); |
305 | amt = write (ns->fd, ns->outputbuffer.data + ns->outputbuffer.start, max); |
| 366 | } |
306 | } |
| 367 | while ((amt < 0) && (errno == EINTR)); |
307 | while ((amt < 0) && (errno == EINTR)); |
| 368 | #endif |
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| 369 | |
308 | |
| 370 | if (amt < 0) |
309 | if (amt < 0) |
| 371 | { /* We got an error */ |
310 | { /* We got an error */ |
| 372 | |
311 | |
| 373 | #ifdef WIN32 /* ***win32 write_socket_buffer: change error handling */ |
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| 374 | if (amt == -1 && WSAGetLastError () != WSAEWOULDBLOCK) |
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| 375 | { |
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| 376 | LOG (llevError, "New socket write failed (wsb) (%d).\n", WSAGetLastError ()); |
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| 377 | #else |
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| 378 | if (errno != EWOULDBLOCK) |
312 | if (errno != EWOULDBLOCK) |
| 379 | { |
313 | { |
| 380 | LOG (llevError, "New socket write failed (wsb) (%d: %s).\n", errno, strerror (errno)); |
314 | LOG (llevError, "New socket write failed (wsb) (%d: %s).\n", errno, strerror (errno)); |
| 381 | #endif |
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| 382 | ns->status = Ns_Dead; |
315 | ns->status = Ns_Dead; |
| 383 | return; |
316 | return; |
| 384 | } |
317 | } |
| 385 | else |
318 | else |
| 386 | { /* EWOULDBLOCK */ |
319 | { /* EWOULDBLOCK */ |
| … | |
… | |
| 430 | #endif |
363 | #endif |
| 431 | /* If we manage to write more than we wanted, take it as a bonus */ |
364 | /* If we manage to write more than we wanted, take it as a bonus */ |
| 432 | while (len > 0) |
365 | while (len > 0) |
| 433 | { |
366 | { |
| 434 | |
367 | |
| 435 | #ifdef WIN32 /* ***win32 Write_To_Socket: change write() to send() */ |
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| 436 | amt = send (ns->fd, pos, len, 0); |
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| 437 | #else |
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| 438 | do |
368 | do |
| 439 | { |
369 | { |
| 440 | amt = write (ns->fd, pos, len); |
370 | amt = write (ns->fd, pos, len); |
| 441 | } |
371 | } |
| 442 | while ((amt < 0) && (errno == EINTR)); |
372 | while ((amt < 0) && (errno == EINTR)); |
| 443 | #endif |
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| 444 | |
373 | |
| 445 | if (amt < 0) |
374 | if (amt < 0) |
| 446 | { /* We got an error */ |
375 | { /* We got an error */ |
| 447 | #ifdef WIN32 /* ***win32 Write_To_Socket: change error handling */ |
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| 448 | if (amt == -1 && WSAGetLastError () != WSAEWOULDBLOCK) |
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| 449 | { |
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| 450 | LOG (llevError, "New socket write failed WTS (%d).\n", WSAGetLastError ()); |
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| 451 | #else |
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| 452 | if (errno != EWOULDBLOCK) |
376 | if (errno != EWOULDBLOCK) |
| 453 | { |
377 | { |
| 454 | LOG (llevError, "New socket write failed WTS (%d: %s).\n", /* ---WIN32 */ |
378 | LOG (llevError, "New socket write failed WTS (%d: %s).\n", /* ---WIN32 */ |
| 455 | errno, strerror (errno)); |
379 | errno, strerror (errno)); |
| 456 | #endif |
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| 457 | ns->status = Ns_Dead; |
380 | ns->status = Ns_Dead; |
| 458 | return; |
381 | return; |
| 459 | } |
382 | } |
| 460 | else |
383 | else |
| 461 | { /* EWOULDBLOCK */ |
384 | { /* EWOULDBLOCK */ |
| … | |
… | |
| 574 | cst_lst.obytes = 0; |
497 | cst_lst.obytes = 0; |
| 575 | cst_lst.max_conn = socket_info.nconns; |
498 | cst_lst.max_conn = socket_info.nconns; |
| 576 | cst_lst.time_start = now; |
499 | cst_lst.time_start = now; |
| 577 | } |
500 | } |
| 578 | #endif |
501 | #endif |
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502 | |
