| File: | d/binder.c |
| Warning: | line 1171, column 5 Duplicate code detected |
| Note: | line 1407, column 9 Similar code here |
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| 1 | /* |
| 2 | * The contents of this file are subject to the Mozilla Public License |
| 3 | * Version 1.1 (the "License"); you may not use this file except in |
| 4 | * compliance with the License. You may obtain a copy of the License at |
| 5 | * http://mozilla.org/. |
| 6 | * |
| 7 | * Software distributed under the License is distributed on an "AS IS" |
| 8 | * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See |
| 9 | * the License for the specific language governing rights and limitations |
| 10 | * under the License. |
| 11 | * |
| 12 | * The Original Code is AOLserver Code and related documentation |
| 13 | * distributed by AOL. |
| 14 | * |
| 15 | * The Initial Developer of the Original Code is America Online, |
| 16 | * Inc. Portions created by AOL are Copyright (C) 1999 America Online, |
| 17 | * Inc. All Rights Reserved. |
| 18 | * |
| 19 | * Alternatively, the contents of this file may be used under the terms |
| 20 | * of the GNU General Public License (the "GPL"), in which case the |
| 21 | * provisions of GPL are applicable instead of those above. If you wish |
| 22 | * to allow use of your version of this file only under the terms of the |
| 23 | * GPL and not to allow others to use your version of this file under the |
| 24 | * License, indicate your decision by deleting the provisions above and |
| 25 | * replace them with the notice and other provisions required by the GPL. |
| 26 | * If you do not delete the provisions above, a recipient may use your |
| 27 | * version of this file under either the License or the GPL. |
| 28 | */ |
| 29 | |
| 30 | |
| 31 | /* |
| 32 | * binder.c -- |
| 33 | * |
| 34 | * Support for pre-bound privileged ports for Unix |
| 35 | */ |
| 36 | |
| 37 | #include "nsd.h" |
| 38 | |
| 39 | #ifndef _WIN32 |
| 40 | # include <sys/un.h> |
| 41 | # include <sys/uio.h> |
| 42 | |
| 43 | # define REQUEST_SIZE(sizeof(int) + sizeof(int) + sizeof(int) + 46) (sizeof(int) + sizeof(int) + sizeof(int) + NS_IPADDR_SIZE46) |
| 44 | # define RESPONSE_SIZE(sizeof(int)) (sizeof(int)) |
| 45 | |
| 46 | typedef struct Prebind { |
| 47 | size_t count; |
| 48 | NS_SOCKETint sockets[1]; |
| 49 | } Prebind; |
| 50 | |
| 51 | #endif |
| 52 | |
| 53 | /* |
| 54 | * Local variables defined in this file |
| 55 | */ |
| 56 | |
| 57 | static Ns_Mutex lock = NULL((void*)0); |
| 58 | static Tcl_HashTable preboundTcp; |
| 59 | static Tcl_HashTable preboundUdp; |
| 60 | static Tcl_HashTable preboundRaw; |
| 61 | static Tcl_HashTable preboundUnix; |
| 62 | |
| 63 | static bool_Bool binderRunning = NS_FALSE0; |
| 64 | static NS_SOCKETint binderRequest[2] = { NS_INVALID_SOCKET(-1), NS_INVALID_SOCKET(-1) }; |
| 65 | static NS_SOCKETint binderResponse[2] = { NS_INVALID_SOCKET(-1), NS_INVALID_SOCKET(-1) }; |
| 66 | |
| 67 | /* |
| 68 | * Local functions defined in this file |
| 69 | */ |
| 70 | #ifndef _WIN32 |
| 71 | static Ns_ReturnCode PrebindSockets(const char *spec) |
| 72 | NS_GNUC_NONNULL(1)__attribute__((__nonnull__(1))); |
| 73 | |
| 74 | static void Binder(void); |
| 75 | |
| 76 | static struct Prebind* PrebindAlloc(const char *proto, size_t reuses, struct sockaddr *saPtr) |
| 77 | NS_GNUC_NONNULL(1)__attribute__((__nonnull__(1))) NS_GNUC_NONNULL(3)__attribute__((__nonnull__(3))); |
| 78 | |
| 79 | static bool_Bool PrebindGet(const char *proto, struct sockaddr *saPtr, NS_SOCKETint *sockPtr) |
| 80 | NS_GNUC_NONNULL(1)__attribute__((__nonnull__(1))) NS_GNUC_NONNULL(2)__attribute__((__nonnull__(2))) NS_GNUC_NONNULL(3)__attribute__((__nonnull__(3))); |
| 81 | |
| 82 | static void PrebindCloseSockets(const char *proto, struct sockaddr *saPtr, struct Prebind *pPtr) |
| 83 | NS_GNUC_NONNULL(1)__attribute__((__nonnull__(1))) NS_GNUC_NONNULL(2)__attribute__((__nonnull__(2))) NS_GNUC_NONNULL(3)__attribute__((__nonnull__(3))); |
| 84 | #endif |
| 85 | |
| 86 | |
| 87 | #ifndef _WIN32 |
| 88 | |
| 89 | /* |
| 90 | *---------------------------------------------------------------------- |
| 91 | * |
| 92 | * PrebindAlloc -- |
| 93 | * |
| 94 | * Create a Prebind structure with potentially multiple sockets |
| 95 | * binding to the identical port. This is needed for e.g. multiple |
| 96 | * listeners with SO_REUSEPORT. |
| 97 | * |
| 98 | * Results: |
| 99 | * Either a prebind structure or NULL inc ase of failure. |
| 100 | * |
| 101 | * Side effects: |
| 102 | * Allocating memory, binding of TCP or UDP sockets. |
| 103 | * |
| 104 | *---------------------------------------------------------------------- |
| 105 | */ |
| 106 | static struct Prebind* |
| 107 | PrebindAlloc(const char *proto, size_t reuses, struct sockaddr *saPtr) |
| 108 | { |
| 109 | struct Prebind *pPtr; |
| 110 | |
| 111 | NS_NONNULL_ASSERT(proto != NULL)((void) (0)); |
| 112 | NS_NONNULL_ASSERT(saPtr != NULL)((void) (0)); |
| 113 | |
| 114 | pPtr = ns_malloc(sizeof(Prebind) + sizeof(NS_SOCKETint)*reuses-1); |
| 115 | if (pPtr != NULL((void*)0)) { |
| 116 | bool_Bool reuseport; |
| 117 | size_t i; |
| 118 | |
| 119 | pPtr->count = reuses; |
| 120 | |
| 121 | reuseport = (reuses > 1); |
| 122 | |
| 123 | for (i = 0u; i < reuses; i++) { |
| 124 | if (*proto == 't') { |
| 125 | pPtr->sockets[i] = Ns_SockBind(saPtr, reuseport); |
| 126 | } else if (*proto == 'u') { |
| 127 | pPtr->sockets[i] = Ns_SockBindUdp(saPtr, reuseport); |
| 128 | } else { |
| 129 | Ns_Log(Error, "prebind: invalid protocol %s", proto); |
| 130 | ns_free(pPtr); |
| 131 | pPtr = NULL((void*)0); |
| 132 | break; |
| 133 | } |
| 134 | |
| 135 | if (pPtr->sockets[i] == NS_INVALID_SOCKET(-1)) { |
| 136 | Ns_LogSockaddr(Error, "prebind error on ", (const struct sockaddr *)saPtr); |
| 137 | Ns_Log(Error, "prebind error: %s", strerror(errno(*__errno_location ()))); |
| 138 | if (i == 0) { |
| 139 | /* |
| 140 | * Could not bind to a single port. Return NULL to |
| 141 | * signal an invalid attempt. |
| 142 | */ |
| 143 | ns_free(pPtr); |
| 144 | pPtr = NULL((void*)0); |
| 145 | break; |
| 146 | } |
| 147 | } |
| 148 | } |
| 149 | } |
| 150 | return pPtr; |
| 151 | } |
| 152 | |
| 153 | |
| 154 | /* |
| 155 | *---------------------------------------------------------------------- |
| 156 | * |
| 157 | * PrebindGet -- |
| 158 | * |
| 159 | * Get a single socket from the prebind structure. In case of |
| 160 | * success, the function returns in its last argument the prebound |
| 161 | * socket and removes it from the set of available sockets. When |
| 162 | * all sockets are consumed the prebind structure is freed and the |
| 163 | * hash entry is removed. |
| 164 | * |
| 165 | * Results: |
| 166 | * |
| 167 | * NS_TRUE in case, there is a prebind structure for the provided |
| 168 | * sockaddr or NS_FALSE on failure. |
| 169 | * |
| 170 | * Side effects: |
| 171 | * Potentially freeing memory. |
| 172 | * |
| 173 | *---------------------------------------------------------------------- |
| 174 | */ |
| 175 | static bool_Bool |
| 176 | PrebindGet(const char *proto, struct sockaddr *saPtr, NS_SOCKETint *sockPtr) |
| 177 | { |
| 178 | static Tcl_HashTable *tablePtr; |
| 179 | Tcl_HashEntry *hPtr; |
| 180 | bool_Bool foundEntry = NS_FALSE0; |
| 181 | |
| 182 | NS_NONNULL_ASSERT(proto != NULL)((void) (0)); |
| 183 | NS_NONNULL_ASSERT(saPtr != NULL)((void) (0)); |
| 184 | NS_NONNULL_ASSERT(sockPtr != NULL)((void) (0)); |
| 185 | |
| 186 | if (*proto == 't') { |
| 187 | tablePtr = &preboundTcp; |
| 188 | } else { |
| 189 | tablePtr = &preboundUdp; |
| 190 | } |
| 191 | |
| 192 | Ns_MutexLock(&lock); |
| 193 | hPtr = Tcl_FindHashEntry(tablePtr, (char *)saPtr)(*((tablePtr)->findProc))(tablePtr, (const char *)((char * )saPtr)); |
| 194 | if (hPtr != NULL((void*)0)) { |
| 195 | struct Prebind *pPtr; |
| 196 | size_t i; |
| 197 | bool_Bool allConsumed = NS_TRUE1; |
| 198 | |
| 199 | /* |
| 200 | * We found a prebound entry. |
| 201 | */ |
| 202 | foundEntry = NS_TRUE1; |
| 203 | |
| 204 | pPtr = (struct Prebind *)Tcl_GetHashValue(hPtr)((hPtr)->clientData); |
| 205 | for (i = 0u; i < pPtr->count; i++) { |
| 206 | /* |
| 207 | * Find an entry, which is usable |
| 208 | */ |
| 209 | if (pPtr->sockets[i] != NS_INVALID_SOCKET(-1)) { |
| 210 | *sockPtr = pPtr->sockets[i]; |
| 211 | pPtr->sockets[i] = NS_INVALID_SOCKET(-1); |
| 212 | break; |
| 213 | } |
| 214 | } |
| 215 | if (*sockPtr != NS_INVALID_SOCKET(-1)) { |
| 216 | /* |
| 217 | * Check, if there are more unconsumed entries. |
| 218 | */ |
| 219 | for (; i < pPtr->count; i++) { |
| 220 | if (pPtr->sockets[i] != NS_INVALID_SOCKET(-1)) { |
| 221 | /* |
| 222 | * Yes, there are more unconsumed entries. |
| 223 | */ |
| 224 | allConsumed = NS_FALSE0; |
| 225 | break; |
| 226 | } |
| 227 | } |
| 228 | } |
| 229 | if (allConsumed) { |
| 230 | ns_free(pPtr); |
| 231 | Tcl_DeleteHashEntry(hPtr); |
| 232 | } |
| 233 | } |
| 234 | Ns_MutexUnlock(&lock); |
| 235 | |
| 236 | return foundEntry; |
| 237 | } |
| 238 | |
| 239 | |
| 240 | /* |
| 241 | *---------------------------------------------------------------------- |
| 242 | * |
| 243 | * PrebindCloseSockets -- |
| 244 | * |
| 245 | * Close the remaining prebound sockets. |
| 246 | * |
| 247 | * Results: |
| 248 | * |
| 249 | * None. |
| 250 | * |
| 251 | * Side effects: |
| 252 | * Freeing memory. |
| 253 | * |
| 254 | *---------------------------------------------------------------------- |
| 255 | */ |
| 256 | static void |
| 257 | PrebindCloseSockets(const char *proto, struct sockaddr *saPtr, struct Prebind *pPtr) |
| 258 | { |
| 259 | size_t i; |
| 260 | unsigned short port; |
| 261 | const char *addr; |
| 262 | char ipString[NS_IPADDR_SIZE46]; |
| 263 | int count = 0; |
| 264 | |
| 265 | NS_NONNULL_ASSERT(proto != NULL)((void) (0)); |
| 266 | NS_NONNULL_ASSERT(saPtr != NULL)((void) (0)); |
| 267 | NS_NONNULL_ASSERT(pPtr != NULL)((void) (0)); |
| 268 | |
| 269 | addr = ns_inet_ntop((struct sockaddr *)saPtr, ipString, sizeof(ipString)); |
| 270 | port = Ns_SockaddrGetPort((struct sockaddr *)saPtr); |
| 271 | |
| 272 | for (i = 0u; i < pPtr->count; i++) { |
| 273 | NS_SOCKETint sock = pPtr->sockets[i]; |
| 274 | |
| 275 | if (sock != NS_INVALID_SOCKET(-1)) { |
| 276 | count ++; |
| 277 | Ns_Log(Debug, "prebind closing %s socket %d\n", proto, sock); |
| 278 | (void)ns_sockcloseclose(sock); |
| 279 | } |
| 280 | } |
| 281 | ns_free(pPtr); |
| 282 | Ns_Log(Warning, "prebind: closed unused %d %s socket(s): [%s]:%hd", |
| 283 | count, proto, addr, port); |
| 284 | } |
| 285 | #endif |
| 286 | |
| 287 | |
| 288 | /* |
| 289 | *---------------------------------------------------------------------- |
| 290 | * |
| 291 | * Ns_SockListenEx -- |
| 292 | * |
| 293 | * Create a new TCP socket bound to the specified port and |
| 294 | * listening for new connections. |
| 295 | * |
| 296 | * Results: |
| 297 | * Socket descriptor or -1 on error. |
| 298 | * |
| 299 | * Side effects: |
| 300 | * None. |
| 301 | * |
| 302 | *---------------------------------------------------------------------- |
| 303 | */ |
| 304 | |
| 305 | #ifndef _WIN32 |
| 306 | NS_SOCKETint |
| 307 | Ns_SockListenEx(const char *address, unsigned short port, int backlog, bool_Bool reuseport) |
| 308 | { |
| 309 | NS_SOCKETint sock = NS_INVALID_SOCKET(-1); |
| 310 | struct NS_SOCKADDR_STORAGEsockaddr_storage sa; |
| 311 | struct sockaddr *saPtr = (struct sockaddr *)&sa; |
| 312 | |
| 313 | if (Ns_GetSockAddr(saPtr, address, port) == NS_OK) { |
| 314 | bool_Bool found; |
| 315 | |
| 316 | found = PrebindGet("tcp", saPtr, &sock); |
| 317 | if (!found) { |
| 318 | /* |
| 319 | * Prebind did not find a prebound entry, try to bind now. |
| 320 | */ |
| 321 | sock = Ns_SockBind(saPtr, reuseport); |
| 322 | //fprintf(stderr, "listen on port %hd binding with reuseport %d\n", port, reuseport); |
| 323 | } else { |
| 324 | //fprintf(stderr, "listen on port %hd already prebound\n", port); |
| 325 | } |
| 326 | |
| 327 | if (sock != NS_INVALID_SOCKET(-1) && listen(sock, backlog) == -1) { |
| 328 | /* |
| 329 | * Can't listen; close the opened socket |
| 330 | */ |
| 331 | ns_sockerrno_t err = ns_sockerrno(*__errno_location ()); |
| 332 | |
| 333 | (void)ns_sockcloseclose(sock); |
| 334 | errno(*__errno_location ()) = err; |
| 335 | sock = NS_INVALID_SOCKET(-1); |
| 336 | Ns_SetSockErrno(err); |
| 337 | } |
| 338 | } else { |
| 339 | /* |
| 340 | * We could not even get the sockaddr, so make clear, that saPtr |
| 341 | * is invalid. |
| 342 | */ |
| 343 | saPtr = NULL((void*)0); |
| 344 | } |
| 345 | |
| 346 | /* |
| 347 | * If forked binder is running and we could not allocate socket |
| 348 | * directly, try to do it through the binder |
| 349 | */ |
| 350 | if (sock == NS_INVALID_SOCKET(-1) && binderRunning && saPtr != NULL((void*)0)) { |
| 351 | sock = Ns_SockBinderListen('T', address, port, backlog); |
| 352 | } |
| 353 | |
| 354 | return sock; |
| 355 | } |
| 356 | #endif /* _WIN32 */ |
| 357 | |
| 358 | |
| 359 | /* |
| 360 | *---------------------------------------------------------------------- |
| 361 | * |
| 362 | * Ns_SockListenUdp -- |
| 363 | * |
| 364 | * Listen on the UDP socket for the given IP address and port. The |
| 365 | * given address might be NULL, which implies the unspecified IP |
| 366 | * address ("0.0.0.0" or "::"). |
| 367 | * |
| 368 | * Results: |
| 369 | * Socket descriptor or -1 on error. |
| 370 | * |
| 371 | * Side effects: |
| 372 | * May create a new socket if none prebound. |
| 373 | * |
| 374 | *---------------------------------------------------------------------- |
| 375 | */ |
| 376 | |
| 377 | NS_SOCKETint |
| 378 | Ns_SockListenUdp(const char *address, unsigned short port, bool_Bool reuseport) |
| 379 | { |
| 380 | NS_SOCKETint sock = NS_INVALID_SOCKET(-1); |
| 381 | struct NS_SOCKADDR_STORAGEsockaddr_storage sa; |
| 382 | struct sockaddr *saPtr = (struct sockaddr *)&sa; |
| 383 | |
| 384 | if (Ns_GetSockAddr(saPtr, address, port) == NS_OK) { |
| 385 | bool_Bool found; |
| 386 | |
| 387 | #ifndef _WIN32 |
| 388 | found = PrebindGet("udp", saPtr, &sock); |
| 389 | #else |
| 390 | found = NS_FALSE0; |
| 391 | #endif |
| 392 | if (!found) { |
| 393 | /* |
| 394 | * Not prebound, bind now |
| 395 | */ |
| 396 | sock = Ns_SockBindUdp(saPtr, reuseport); |
| 397 | } |
| 398 | } |
| 399 | |
| 400 | /* |
| 401 | * If forked binder is running and we could not allocate socket |
| 402 | * directly, try to do it through the binder |
| 403 | */ |
| 404 | |
| 405 | if (sock == NS_INVALID_SOCKET(-1) && binderRunning) { |
| 406 | sock = Ns_SockBinderListen('U', address, port, 0); |
| 407 | } |
| 408 | |
| 409 | return sock; |
| 410 | } |
| 411 | |
| 412 | |
| 413 | /* |
| 414 | *---------------------------------------------------------------------- |
| 415 | * |
| 416 | * Ns_SockListenRaw -- |
| 417 | * |
| 418 | * Listen on the raw socket addressed by the given protocol. |
| 419 | * |
| 420 | * Results: |
| 421 | * Socket descriptor or -1 on error. |
| 422 | * |
| 423 | * Side effects: |
| 424 | * May create a new socket if none prebound. |
| 425 | * |
| 426 | *---------------------------------------------------------------------- |
| 427 | */ |
| 428 | |
| 429 | NS_SOCKETint |
| 430 | Ns_SockListenRaw(int proto) |
| 431 | { |
| 432 | NS_SOCKETint sock = NS_INVALID_SOCKET(-1); |
| 433 | Tcl_HashEntry *hPtr; |
| 434 | Tcl_HashSearch search; |
| 435 | |
| 436 | Ns_MutexLock(&lock); |
| 437 | hPtr = Tcl_FirstHashEntry(&preboundRaw, &search); |
| 438 | while (hPtr != NULL((void*)0)) { |
| 439 | if (proto == PTR2INT(Tcl_GetHashValue(hPtr))((int)(intptr_t)(((hPtr)->clientData)))) { |
| 440 | sock = PTR2NSSOCK(Tcl_GetHashKey(&preboundRaw, hPtr))((int)(intptr_t)(((void *) (((&preboundRaw)->keyType == (1) || (&preboundRaw)->keyType == (-1)) ? (hPtr)-> key.oneWordValue : (hPtr)->key.string)))); |
| 441 | Tcl_DeleteHashEntry(hPtr); |
| 442 | break; |
| 443 | } |
| 444 | hPtr = Tcl_NextHashEntry(&search); |
| 445 | } |
| 446 | Ns_MutexUnlock(&lock); |
| 447 | if (hPtr == NULL((void*)0)) { |
| 448 | /* |
| 449 | * Not prebound, bind now |
| 450 | */ |
| 451 | sock = Ns_SockBindRaw(proto); |
| 452 | } |
| 453 | |
| 454 | /* |
| 455 | * If forked binder is running and we could not allocate socket |
| 456 | * directly, try to do it through the binder |
| 457 | */ |
| 458 | |
| 459 | if (sock == NS_INVALID_SOCKET(-1) && binderRunning) { |
| 460 | sock = Ns_SockBinderListen('R', NULL((void*)0), 0u, proto); |
| 461 | } |
| 462 | |
| 463 | return sock; |
| 464 | } |
| 465 | |
| 466 | |
| 467 | /* |
| 468 | *---------------------------------------------------------------------- |
| 469 | * |
| 470 | * Ns_SockListenUnix -- |
| 471 | * |
| 472 | * Listen on the Unix-domain socket addressed by the given path. |
| 473 | * |
| 474 | * Results: |
| 475 | * Socket descriptor or -1 on error. |
| 476 | * |
| 477 | * Side effects: |
| 478 | * May create a new socket if none prebound. If backlog is zero, |
| 479 | * DGRAM socket will be created otherwise STREAM socket |
| 480 | * |
| 481 | *---------------------------------------------------------------------- |
| 482 | */ |
| 483 | |
| 484 | NS_SOCKETint |
| 485 | Ns_SockListenUnix(const char *path, int backlog, unsigned short mode) |
| 486 | { |
| 487 | NS_SOCKETint sock = NS_INVALID_SOCKET(-1); |
| 488 | #ifndef _WIN32 |
| 489 | Tcl_HashEntry *hPtr; |
| 490 | Tcl_HashSearch search; |
| 491 | |
| 492 | NS_NONNULL_ASSERT(path != NULL)((void) (0)); |
| 493 | |
| 494 | /* |
| 495 | * Check if already prebound |
| 496 | */ |
| 497 | Ns_MutexLock(&lock); |
| 498 | hPtr = Tcl_FirstHashEntry(&preboundUnix, &search); |
| 499 | while (hPtr != NULL((void*)0)) { |
| 500 | const char *value = (char*) Tcl_GetHashValue(hPtr)((hPtr)->clientData); |
| 501 | |
| 502 | if (STREQ(path, value)(((*(path)) == (*(value))) && (strcmp((path),(value)) == 0))) { |
| 503 | sock = PTR2NSSOCK(Tcl_GetHashKey(&preboundRaw, hPtr))((int)(intptr_t)(((void *) (((&preboundRaw)->keyType == (1) || (&preboundRaw)->keyType == (-1)) ? (hPtr)-> key.oneWordValue : (hPtr)->key.string)))); |
| 504 | Tcl_DeleteHashEntry(hPtr); |
| 505 | break; |
| 506 | } |
| 507 | hPtr = Tcl_NextHashEntry(&search); |
| 508 | } |
| 509 | Ns_MutexUnlock(&lock); |
| 510 | |
| 511 | if (hPtr == NULL((void*)0)) { |
| 512 | /* |
| 513 | * Not prebound, bind now |
| 514 | */ |
| 515 | sock = Ns_SockBindUnix(path, backlog > 0 ? SOCK_STREAMSOCK_STREAM : SOCK_DGRAMSOCK_DGRAM, mode); |
| 516 | } |
| 517 | if (sock >= 0 && backlog > 0 && listen(sock, backlog) == -1) { |
| 518 | /* |
| 519 | * Can't listen; close the opened socket |
| 520 | */ |
| 521 | ns_sockerrno_t err = ns_sockerrno(*__errno_location ()); |
| 522 | |
| 523 | (void)ns_sockcloseclose(sock); |
| 524 | errno(*__errno_location ()) = err; |
| 525 | sock = NS_INVALID_SOCKET(-1); |
| 526 | Ns_SetSockErrno(err); |
| 527 | } |
| 528 | |
| 529 | /* |
| 530 | * If forked binder is running and we could not allocate socket |
| 531 | * directly, try to do it through the binder |
| 532 | */ |
| 533 | |
| 534 | if (sock == NS_INVALID_SOCKET(-1) && binderRunning) { |
| 535 | sock = Ns_SockBinderListen('D', path, mode, backlog); |
| 536 | } |
| 537 | #endif /* _WIN32 */ |
| 538 | return sock; |
| 539 | } |
| 540 | |
| 541 | |
| 542 | /* |
| 543 | *---------------------------------------------------------------------- |
| 544 | * |
| 545 | * Ns_SockBindUdp -- |
| 546 | * |
| 547 | * Create a UDP socket and bind it to the passed-in address. |
| 548 | * |
| 549 | * Results: |
| 550 | * Socket descriptor or -1 on error. |
| 551 | * |
| 552 | * Side effects: |
| 553 | * None. |
| 554 | * |
| 555 | *---------------------------------------------------------------------- |
| 556 | */ |
| 557 | |
| 558 | NS_SOCKETint |
| 559 | Ns_SockBindUdp(const struct sockaddr *saPtr, bool_Bool reusePort) |
| 560 | { |
| 561 | NS_SOCKETint sock; |
| 562 | int n = 1; |
| 563 | |
| 564 | NS_NONNULL_ASSERT(saPtr != NULL)((void) (0)); |
| 565 | |
| 566 | sock = (NS_SOCKETint)socket((int)saPtr->sa_family, SOCK_DGRAMSOCK_DGRAM, 0); |
| 567 | |
| 568 | if (sock != NS_INVALID_SOCKET(-1) |
| 569 | && (setsockopt(sock, SOL_SOCKET1, SO_REUSEADDR2, (char*)&n, (socklen_t)sizeof(n)) == -1 |
| 570 | || setsockopt(sock, SOL_SOCKET1, SO_BROADCAST6, (char*)&n, (socklen_t)sizeof(n)) == -1 |
| 571 | || bind(sock, saPtr, Ns_SockaddrGetSockLen(saPtr)) == -1) |
| 572 | ) { |
| 573 | ns_sockerrno_t err = ns_sockerrno(*__errno_location ()); |
| 574 | |
| 575 | (void)ns_sockcloseclose(sock); |
| 576 | sock = NS_INVALID_SOCKET(-1); |
| 577 | Ns_SetSockErrno(err); |
| 578 | } else { |
| 579 | #if defined(SO_REUSEPORT15) |
| 580 | if (reusePort) { |
| 581 | int optval = 1; |
| 582 | setsockopt(sock, SOL_SOCKET1, SO_REUSEPORT15, &optval, (socklen_t)sizeof(optval)); |
| 583 | } |
| 584 | #endif |
| 585 | } |
| 586 | |
| 587 | return sock; |
| 588 | } |
| 589 | |
| 590 | |
| 591 | /* |
| 592 | *---------------------------------------------------------------------- |
| 593 | * |
| 594 | * Ns_SockBindUnix -- |
| 595 | * |
| 596 | * Create a Unix-domain socket and bind it to the passed-in |
| 597 | * file path. |
| 598 | * |
| 599 | * Results: |
| 600 | * Socket descriptor or -1 on error. |
| 601 | * |
| 602 | * Side effects: |
| 603 | * None. |
| 604 | * |
| 605 | *---------------------------------------------------------------------- |
| 606 | */ |
| 607 | |
| 608 | NS_SOCKETint |
| 609 | Ns_SockBindUnix(const char *path, int socktype, unsigned short mode) |
| 610 | { |
| 611 | #ifdef _WIN32 |
| 612 | return NS_INVALID_SOCKET(-1); |
| 613 | #else |
| 614 | NS_SOCKETint sock; |
| 615 | struct sockaddr_un addr; |
| 616 | size_t pathLength; |
| 617 | |
| 618 | NS_NONNULL_ASSERT(path != NULL)((void) (0)); |
| 619 | pathLength = strlen(path); |
| 620 | |
| 621 | if (pathLength >= sizeof(addr.sun_path)) { |
| 622 | Ns_Log(Error, "provided path exceeds maximum length: %s\n", path); |
| 623 | return NS_INVALID_SOCKET(-1); |
| 624 | } |
| 625 | |
| 626 | memset(&addr, 0, sizeof(addr)); |
| 627 | addr.sun_family = AF_UNIX1; |
| 628 | memcpy(addr.sun_path, path, pathLength + 1); |
| 629 | unlink(path); |
| 630 | |
| 631 | sock = socket(AF_UNIX1, socktype > 0 ? socktype : SOCK_STREAMSOCK_STREAM, 0); |
| 632 | /* |
| 633 | * There is a small race condition below, since the permissions on |
| 634 | * the socket are checked not in an atomic fashion and might be |
| 635 | * changed immediately after the bind operation. Unfortunately, |
| 636 | * fchmod is not portable. |
| 637 | */ |
| 638 | if (sock != NS_INVALID_SOCKET(-1) |
| 639 | && (bind(sock, (struct sockaddr *) &addr, sizeof(addr)) == -1 |
| 640 | || (mode != 0u && chmod(path, mode) == -1)) |
| 641 | ) { |
| 642 | ns_sockerrno_t err = errno(*__errno_location ()); |
| 643 | |
| 644 | (void)ns_sockcloseclose(sock); |
| 645 | sock = NS_INVALID_SOCKET(-1); |
| 646 | Ns_SetSockErrno(err); |
| 647 | } |
| 648 | |
| 649 | return sock; |
| 650 | #endif /* _WIN32 */ |
| 651 | } |
| 652 | |
| 653 | |
| 654 | /* |
| 655 | *---------------------------------------------------------------------- |
| 656 | * |
| 657 | * Ns_SockBindRaw -- |
| 658 | * |
| 659 | * Create a raw socket. It does not bind, hence the call name |
| 660 | * is not entirely correct but is on-pair with other types of |
| 661 | * sockets (udp, tcp, unix). |
| 662 | * |
| 663 | * Results: |
| 664 | * Socket descriptor or -1 on error. |
| 665 | * |
| 666 | * Side effects: |
| 667 | * None. |
| 668 | * |
| 669 | *---------------------------------------------------------------------- |
| 670 | */ |
| 671 | |
| 672 | NS_SOCKETint |
| 673 | Ns_SockBindRaw(int proto) |
| 674 | { |
| 675 | NS_SOCKETint sock; |
| 676 | |
| 677 | sock = (NS_SOCKETint)socket(AF_INET2, SOCK_RAWSOCK_RAW, proto); |
| 678 | |
| 679 | if (sock == NS_INVALID_SOCKET(-1)) { |
| 680 | ns_sockerrno_t err = ns_sockerrno(*__errno_location ()); |
| 681 | |
| 682 | Ns_SetSockErrno(err); |
| 683 | } |
| 684 | |
| 685 | return sock; |
| 686 | } |
| 687 | |
| 688 | |
| 689 | /* |
| 690 | *---------------------------------------------------------------------- |
| 691 | * |
| 692 | * NsInitBinder -- |
| 693 | * |
| 694 | * Initialize the pre-bind tables. |
| 695 | * |
| 696 | * Results: |
| 697 | * None. |
| 698 | * |
| 699 | * Side effects: |
| 700 | * None. |
| 701 | * |
| 702 | *---------------------------------------------------------------------- |
| 703 | */ |
| 704 | |
| 705 | void |
| 706 | NsInitBinder(void) |
| 707 | { |
| 708 | Ns_MutexInit(&lock); |
| 709 | Ns_MutexSetName(&lock, "binder"); |
| 710 | |
| 711 | Tcl_InitHashTable(&preboundTcp, (int)(sizeof(struct NS_SOCKADDR_STORAGEsockaddr_storage) / sizeof(int))); |
| 712 | Tcl_InitHashTable(&preboundUdp, (int)(sizeof(struct NS_SOCKADDR_STORAGEsockaddr_storage) / sizeof(int))); |
| 713 | Tcl_InitHashTable(&preboundRaw, TCL_ONE_WORD_KEYS(1)); |
| 714 | Tcl_InitHashTable(&preboundUnix, TCL_STRING_KEYS(0)); |
| 715 | } |
| 716 | |
| 717 | |
| 718 | /* |
| 719 | *---------------------------------------------------------------------- |
| 720 | * |
| 721 | * NsPreBind -- |
| 722 | * |
| 723 | * Pre-bind any requested ports (called from Ns_Main at startup). |
| 724 | * |
| 725 | * Results: |
| 726 | * None. |
| 727 | * |
| 728 | * Side effects: |
| 729 | * May pre-bind to one or more ports. |
| 730 | * |
| 731 | *---------------------------------------------------------------------- |
| 732 | */ |
| 733 | |
| 734 | Ns_ReturnCode |
| 735 | NsPreBind(const char *args, const char *file) |
| 736 | { |
| 737 | Ns_ReturnCode status = NS_OK; |
| 738 | |
| 739 | #ifndef _WIN32 |
| 740 | |
| 741 | if (args != NULL((void*)0)) { |
| 742 | status = PrebindSockets(args); |
| 743 | } |
| 744 | |
| 745 | /* |
| 746 | * Check, if the bind options were provided via file. If so, parse |
| 747 | * and interpret it. |
| 748 | */ |
| 749 | if (status == NS_OK && file != NULL((void*)0)) { |
| 750 | Tcl_Channel chan = Tcl_OpenFileChannel(NULL((void*)0), file, "r", 0); |
| 751 | |
| 752 | if (chan == NULL((void*)0)) { |
| 753 | Ns_Log(Error, "NsPreBind: can't open file '%s': '%s'", file, |
| 754 | strerror(Tcl_GetErrno())); |
| 755 | } else { |
| 756 | Tcl_DString line; |
| 757 | |
| 758 | Tcl_DStringInit(&line); |
| 759 | while (Tcl_Eof(chan) == 0) { |
| 760 | Tcl_DStringSetLength(&line, 0); |
| 761 | if (Tcl_Gets(chan, &line) > 0) { |
| 762 | status = PrebindSockets(Tcl_DStringValue(&line)((&line)->string)); |
| 763 | if (status != NS_OK) { |
| 764 | break; |
| 765 | } |
| 766 | } |
| 767 | } |
| 768 | Tcl_DStringFree(&line); |
| 769 | Tcl_Close(NULL((void*)0), chan); |
| 770 | } |
| 771 | } |
| 772 | #endif /* _WIN32 */ |
| 773 | return status; |
| 774 | } |
| 775 | |
| 776 | |
| 777 | /* |
| 778 | *---------------------------------------------------------------------- |
| 779 | * |
| 780 | * NsClosePreBound -- |
| 781 | * |
| 782 | * Close remaining pre-bound sockets not consumed by anybody. |
| 783 | * |
| 784 | * Results: |
| 785 | * None. |
| 786 | * |
| 787 | * Side effects: |
| 788 | * Pre-bind hash-tables are cleaned and re-initialized. |
| 789 | * |
| 790 | *---------------------------------------------------------------------- |
| 791 | */ |
| 792 | |
| 793 | void |
| 794 | NsClosePreBound(void) |
| 795 | { |
| 796 | #ifndef _WIN32 |
| 797 | Tcl_HashEntry *hPtr; |
| 798 | Tcl_HashSearch search; |
| 799 | NS_SOCKETint sock; |
| 800 | struct sockaddr *saPtr; |
| 801 | |
| 802 | Ns_MutexLock(&lock); |
| 803 | |
| 804 | /* |
| 805 | * Close TCP sockets |
| 806 | */ |
| 807 | hPtr = Tcl_FirstHashEntry(&preboundTcp, &search); |
| 808 | while (hPtr != NULL((void*)0)) { |
| 809 | saPtr = (struct sockaddr *)Tcl_GetHashKey(&preboundTcp, hPtr)((void *) (((&preboundTcp)->keyType == (1) || (&preboundTcp )->keyType == (-1)) ? (hPtr)->key.oneWordValue : (hPtr) ->key.string)); |
| 810 | PrebindCloseSockets("tcp", saPtr, Tcl_GetHashValue(hPtr)((hPtr)->clientData)); |
| 811 | Tcl_DeleteHashEntry(hPtr); |
| 812 | hPtr = Tcl_NextHashEntry(&search); |
| 813 | } |
| 814 | Tcl_DeleteHashTable(&preboundTcp); |
| 815 | Tcl_InitHashTable(&preboundTcp, sizeof(struct NS_SOCKADDR_STORAGEsockaddr_storage)/sizeof(int)); |
| 816 | |
| 817 | /* |
| 818 | * Close UDP sockets |
| 819 | */ |
| 820 | hPtr = Tcl_FirstHashEntry(&preboundUdp, &search); |
| 821 | while (hPtr != NULL((void*)0)) { |
| 822 | saPtr = (struct sockaddr *)Tcl_GetHashKey(&preboundUdp, hPtr)((void *) (((&preboundUdp)->keyType == (1) || (&preboundUdp )->keyType == (-1)) ? (hPtr)->key.oneWordValue : (hPtr) ->key.string)); |
| 823 | PrebindCloseSockets("udp", saPtr, Tcl_GetHashValue(hPtr)((hPtr)->clientData)); |
| 824 | Tcl_DeleteHashEntry(hPtr); |
| 825 | hPtr = Tcl_NextHashEntry(&search); |
| 826 | } |
| 827 | Tcl_DeleteHashTable(&preboundUdp); |
| 828 | Tcl_InitHashTable(&preboundUdp, sizeof(struct NS_SOCKADDR_STORAGEsockaddr_storage)/sizeof(int)); |
| 829 | |
| 830 | /* |
| 831 | * Close raw sockets |
| 832 | */ |
| 833 | hPtr = Tcl_FirstHashEntry(&preboundRaw, &search); |
| 834 | while (hPtr != NULL((void*)0)) { |
| 835 | int port; |
| 836 | |
| 837 | sock = PTR2NSSOCK(Tcl_GetHashKey(&preboundRaw, hPtr))((int)(intptr_t)(((void *) (((&preboundRaw)->keyType == (1) || (&preboundRaw)->keyType == (-1)) ? (hPtr)-> key.oneWordValue : (hPtr)->key.string)))); |
| 838 | port = PTR2INT(Tcl_GetHashValue(hPtr))((int)(intptr_t)(((hPtr)->clientData))); |
| 839 | Ns_Log(Warning, "prebind: closed unused raw socket: %d = %d", |
| 840 | port, sock); |
| 841 | (void)ns_sockcloseclose(sock); |
| 842 | Tcl_DeleteHashEntry(hPtr); |
| 843 | hPtr = Tcl_NextHashEntry(&search); |
| 844 | } |
| 845 | Tcl_DeleteHashTable(&preboundRaw); |
| 846 | Tcl_InitHashTable(&preboundRaw, TCL_ONE_WORD_KEYS(1)); |
| 847 | |
| 848 | /* |
| 849 | * Close Unix-domain sockets |
| 850 | */ |
| 851 | hPtr = Tcl_FirstHashEntry(&preboundUnix, &search); |
| 852 | while (hPtr != NULL((void*)0)) { |
| 853 | const char *addr = (char *) Tcl_GetHashKey(&preboundUnix, hPtr)((void *) (((&preboundUnix)->keyType == (1) || (&preboundUnix )->keyType == (-1)) ? (hPtr)->key.oneWordValue : (hPtr) ->key.string)); |
| 854 | |
| 855 | sock = PTR2NSSOCK(Tcl_GetHashValue(hPtr))((int)(intptr_t)(((hPtr)->clientData))); |
| 856 | Ns_Log(Warning, "prebind: closed unused Unix-domain socket: [%s] %d", |
| 857 | addr, sock); |
| 858 | (void)ns_sockcloseclose(sock); |
| 859 | Tcl_DeleteHashEntry(hPtr); |
| 860 | hPtr = Tcl_NextHashEntry(&search); |
| 861 | } |
| 862 | Tcl_DeleteHashTable(&preboundUnix); |
| 863 | Tcl_InitHashTable(&preboundUnix, TCL_STRING_KEYS(0)); |
| 864 | |
| 865 | Ns_MutexUnlock(&lock); |
| 866 | #endif /* _WIN32 */ |
| 867 | } |
| 868 | |
| 869 | |
| 870 | /* |
| 871 | *---------------------------------------------------------------------- |
| 872 | * |
| 873 | * PreBind -- |
| 874 | * |
| 875 | * Pre-bind to one or more ports in a comma-separated list: |
| 876 | * |
| 877 | * addr:port[/protocol][#number] |
| 878 | * port[/protocol][#number] |
| 879 | * 0/icmp[/count] |
| 880 | * /path[|mode] |
| 881 | * |
| 882 | * protocol: tcp|udp |
| 883 | * mode: mode bits as used by "chmod" specified as octal value |
| 884 | * |
| 885 | * Example: nsd -c -b /tmp/foo,localhost:9999/tcp#2,localhost:9998,udp:9997 |
| 886 | * Results: |
| 887 | * None. |
| 888 | * |
| 889 | * Side effects: |
| 890 | * Sockets are left in bound state for later listen |
| 891 | * in Ns_SockListen*(). |
| 892 | * |
| 893 | *---------------------------------------------------------------------- |
| 894 | */ |
| 895 | #ifndef _WIN32 |
| 896 | |
| 897 | static Ns_ReturnCode |
| 898 | PrebindSockets(const char *spec) |
| 899 | { |
| 900 | Tcl_HashEntry *hPtr; |
| 901 | int isNew = 0, specCount = 0; |
| 902 | char *next, *line, *lines; |
| 903 | Ns_ReturnCode status = NS_OK; |
| 904 | struct NS_SOCKADDR_STORAGEsockaddr_storage sa; |
| 905 | struct sockaddr *saPtr = (struct sockaddr *)&sa; |
| 906 | |
| 907 | NS_NONNULL_ASSERT(spec != NULL)((void) (0)); |
| 908 | |
| 909 | line = lines = ns_strdup(spec); |
| 910 | |
| 911 | for (; line != NULL((void*)0); line = next) { |
| 912 | const char *proto; |
| 913 | char *addr, *p, *str = NULL((void*)0), *end; |
| 914 | unsigned short port = 0u; |
| 915 | long reuses; |
| 916 | struct Prebind *pPtr; |
| 917 | |
| 918 | specCount ++; |
| 919 | /* |
| 920 | * Find the next comma separated token. |
| 921 | */ |
| 922 | next = strchr(line, INTCHAR(',')((int)((unsigned char)((','))))); |
| 923 | if (next != NULL((void*)0)) { |
| 924 | *next++ = '\0'; |
| 925 | } |
| 926 | |
| 927 | /* |
| 928 | * Set default proto and addr. |
| 929 | */ |
| 930 | proto = "tcp"; |
| 931 | addr = (char *)NS_IP_UNSPECIFIED"::"; |
| 932 | reuses = 1; |
| 933 | |
| 934 | /* |
| 935 | * Parse reuses count |
| 936 | */ |
| 937 | p = strrchr(line, INTCHAR('#')((int)((unsigned char)(('#'))))); |
| 938 | if (p != NULL((void*)0)) { |
| 939 | *p++ = '\0'; |
| 940 | reuses = strtol(p, NULL((void*)0), 10); |
| 941 | if (reuses < 1) { |
| 942 | Ns_Log(Warning, "prebind: ignore invalid number of protoport reuses: '%s'", p); |
| 943 | reuses = 1; |
| 944 | } |
| 945 | } |
| 946 | |
| 947 | /* |
| 948 | * Parse "addr:port" or "port" |
| 949 | * |
| 950 | * addr:port[/protocol][#number] |
| 951 | * port[/protocol][#number] |
| 952 | * 0/icmp[/count] |
| 953 | */ |
| 954 | { |
| 955 | char *portStr; |
| 956 | bool_Bool hostParsedOk = Ns_HttpParseHost2(line, NS_TRUE1, &addr, &portStr, &end); |
| 957 | |
| 958 | if (hostParsedOk && line != end && addr != portStr ) { |
| 959 | long l; |
| 960 | |
| 961 | if (portStr != NULL((void*)0)) { |
| 962 | l = strtol(portStr, NULL((void*)0), 10); |
| 963 | } else { |
| 964 | assert(addr != NULL)((void) (0)); |
| 965 | l = strtol(addr, NULL((void*)0), 10); |
| 966 | addr = (char *)NS_IP_UNSPECIFIED"::"; |
| 967 | } |
| 968 | port = (l >= 0) ? (unsigned short)l : 0u; |
| 969 | |
| 970 | /* |
| 971 | * Parse protocol |
| 972 | */ |
| 973 | if (*line != '/' && (str = strchr(line, INTCHAR('/')((int)((unsigned char)(('/')))))) != NULL((void*)0)) { |
| 974 | *str++ = '\0'; |
| 975 | proto = str; |
| 976 | } |
| 977 | } else { |
| 978 | Ns_Log(Debug, "prebind: line <%s> was not parsed ok, must be UNIX", line); |
| 979 | proto = "unix"; |
| 980 | } |
| 981 | /* |
| 982 | * Continue parsing after "addr:port|port" |
| 983 | */ |
| 984 | line = end; |
| 985 | } |
| 986 | |
| 987 | /* |
| 988 | * TCP |
| 989 | */ |
| 990 | Ns_Log(Notice, "prebind: try proto %s addr %s port %d reuses %ld", |
| 991 | proto, addr, port, reuses); |
| 992 | |
| 993 | if (STREQ(proto, "tcp")(((*(proto)) == (*("tcp"))) && (strcmp((proto),("tcp" )) == 0)) && port > 0) { |
| 994 | if (Ns_GetSockAddr(saPtr, addr, port) != NS_OK) { |
| 995 | Ns_Log(Error, "prebind: tcp: invalid address: [%s]:%d", addr, port); |
| 996 | continue; |
| 997 | } |
| 998 | hPtr = Tcl_CreateHashEntry(&preboundTcp, (char *) &sa, &isNew)(*((&preboundTcp)->createProc))(&preboundTcp, (const char *)((char *) &sa), &isNew); |
| 999 | if (isNew == 0) { |
| 1000 | Ns_Log(Error, "prebind: tcp: duplicate entry: [%s]:%d", |
| 1001 | addr, port); |
| 1002 | continue; |
| 1003 | } |
| 1004 | |
| 1005 | Ns_LogSockaddr(Notice, "prebind adds", (const struct sockaddr *)saPtr); |
| 1006 | |
| 1007 | pPtr = PrebindAlloc(proto, (size_t)reuses, saPtr); |
| 1008 | if (pPtr == NULL((void*)0)) { |
| 1009 | Tcl_DeleteHashEntry(hPtr); |
| 1010 | status = NS_ERROR; |
| 1011 | break; |
| 1012 | } |
| 1013 | Tcl_SetHashValue(hPtr, pPtr)((hPtr)->clientData = (ClientData) (pPtr)); |
| 1014 | Ns_Log(Notice, "prebind: tcp: [%s]:%d", addr, port); |
| 1015 | } |
| 1016 | |
| 1017 | /* |
| 1018 | * UDP |
| 1019 | */ |
| 1020 | if (STREQ(proto, "udp")(((*(proto)) == (*("udp"))) && (strcmp((proto),("udp" )) == 0)) && port > 0) { |
| 1021 | if (Ns_GetSockAddr(saPtr, addr, port) != NS_OK) { |
| 1022 | Ns_Log(Error, "prebind: udp: invalid address: [%s]:%d", |
| 1023 | addr, port); |
| 1024 | continue; |
| 1025 | } |
| 1026 | hPtr = Tcl_CreateHashEntry(&preboundUdp, (char *)saPtr, &isNew)(*((&preboundUdp)->createProc))(&preboundUdp, (const char *)((char *)saPtr), &isNew); |
| 1027 | if (isNew == 0) { |
| 1028 | Ns_Log(Error, "prebind: udp: duplicate entry: [%s]:%d", |
| 1029 | addr, port); |
| 1030 | continue; |
| 1031 | } |
| 1032 | pPtr = PrebindAlloc(proto, (size_t)reuses, saPtr); |
| 1033 | if (pPtr == NULL((void*)0)) { |
| 1034 | Tcl_DeleteHashEntry(hPtr); |
| 1035 | status = NS_ERROR; |
| 1036 | break; |
| 1037 | } |
| 1038 | Tcl_SetHashValue(hPtr, pPtr)((hPtr)->clientData = (ClientData) (pPtr)); |
| 1039 | Ns_Log(Notice, "prebind: udp: [%s]:%d", addr, port); |
| 1040 | } |
| 1041 | |
| 1042 | /* |
| 1043 | * ICMP |
| 1044 | * |
| 1045 | * Example: |
| 1046 | * 0/icmp[/count] |
| 1047 | */ |
| 1048 | if (strncmp(proto, "icmp", 4u) == 0) { |
| 1049 | long count = 1; |
| 1050 | |
| 1051 | /* |
| 1052 | * Parse count |
| 1053 | */ |
| 1054 | if (str != NULL((void*)0)) { |
| 1055 | str = strchr(str, INTCHAR('/')((int)((unsigned char)(('/'))))); |
| 1056 | if (str != NULL((void*)0)) { |
| 1057 | *(str++) = '\0'; |
| 1058 | count = strtol(str, NULL((void*)0), 10); |
| 1059 | } |
| 1060 | } |
| 1061 | while (count--) { |
| 1062 | NS_SOCKETint sock = Ns_SockBindRaw(IPPROTO_ICMPIPPROTO_ICMP); |
| 1063 | if (sock == NS_INVALID_SOCKET(-1)) { |
| 1064 | Ns_Log(Error, "prebind: bind error for icmp: %s", strerror(errno(*__errno_location ()))); |
| 1065 | continue; |
| 1066 | } |
| 1067 | hPtr = Tcl_CreateHashEntry(&preboundRaw, NSSOCK2PTR(sock), &isNew)(*((&preboundRaw)->createProc))(&preboundRaw, (const char *)(((void *)(intptr_t)(sock))), &isNew); |
| 1068 | if (isNew == 0) { |
| 1069 | Ns_Log(Error, "prebind: icmp: duplicate entry"); |
| 1070 | (void)ns_sockcloseclose(sock); |
| 1071 | continue; |
| 1072 | } |
| 1073 | Tcl_SetHashValue(hPtr, IPPROTO_ICMP)((hPtr)->clientData = (ClientData) (IPPROTO_ICMP)); |
| 1074 | Ns_Log(Notice, "prebind: icmp: %d", sock); |
| 1075 | } |
| 1076 | } |
| 1077 | |
| 1078 | /* |
| 1079 | * Unix-domain socket |
| 1080 | * a line starting with a '/' means: path, which |
| 1081 | * implies a unix-domain socket. |
| 1082 | */ |
| 1083 | if (STREQ(proto, "unix")(((*(proto)) == (*("unix"))) && (strcmp((proto),("unix" )) == 0))) { |
| 1084 | if (Ns_PathIsAbsolute(line) == NS_TRUE1) { |
| 1085 | unsigned short mode = 0u; |
| 1086 | NS_SOCKETint sock; |
| 1087 | |
| 1088 | Ns_Log(Debug, "prebind: Unix-domain socket <%s>\n", line); |
| 1089 | |
| 1090 | /* |
| 1091 | * Parse mode |
| 1092 | */ |
| 1093 | str = strchr(line, INTCHAR('|')((int)((unsigned char)(('|'))))); |
| 1094 | if (str != NULL((void*)0)) { |
| 1095 | long l; |
| 1096 | |
| 1097 | *(str++) = '\0'; |
| 1098 | l = strtol(str, NULL((void*)0), 8); |
| 1099 | if (l > 0) { |
| 1100 | mode = (unsigned short)l; |
| 1101 | } else { |
| 1102 | Ns_Log(Error, "prebind: unix: ignore invalid mode value: %s", line); |
| 1103 | } |
| 1104 | } |
| 1105 | hPtr = Tcl_CreateHashEntry(&preboundUnix, (char *) line, &isNew)(*((&preboundUnix)->createProc))(&preboundUnix, (const char *)((char *) line), &isNew); |
| 1106 | if (isNew == 0) { |
| 1107 | Ns_Log(Error, "prebind: unix: duplicate entry: %s", line); |
| 1108 | continue; |
| 1109 | } |
| 1110 | sock = Ns_SockBindUnix(line, SOCK_STREAMSOCK_STREAM, mode); |
| 1111 | if (sock == NS_INVALID_SOCKET(-1)) { |
| 1112 | Ns_Log(Error, "prebind: unix: %s: %s", proto, strerror(errno(*__errno_location ()))); |
| 1113 | Tcl_DeleteHashEntry(hPtr); |
| 1114 | continue; |
| 1115 | } |
| 1116 | Tcl_SetHashValue(hPtr, NSSOCK2PTR(sock))((hPtr)->clientData = (ClientData) (((void *)(intptr_t)(sock )))); |
| 1117 | Ns_Log(Notice, "prebind: unix: %s = %d", line, sock); |
| 1118 | } else { |
| 1119 | Ns_Log(Warning, "prebind: invalid entry #%d: '%s'", specCount, spec); |
| 1120 | } |
| 1121 | } |
| 1122 | } |
| 1123 | ns_free(lines); |
| 1124 | |
| 1125 | return status; |
| 1126 | } |
| 1127 | #endif |
| 1128 | |
| 1129 | |
| 1130 | /* |
| 1131 | *---------------------------------------------------------------------- |
| 1132 | * |
| 1133 | * Ns_SockBinderListen -- |
| 1134 | * |
| 1135 | * Create a new TCP/UDP/Unix socket bound to the specified port |
| 1136 | * and listening for new connections. |
| 1137 | * |
| 1138 | * The following types are defined: |
| 1139 | * T - TCP socket |
| 1140 | * U - UDP socket |
| 1141 | * D - Unix domain socket |
| 1142 | * R - raw socket |
| 1143 | * |
| 1144 | * Results: |
| 1145 | * Socket descriptor or -1 on error. |
| 1146 | * |
| 1147 | * Side effects: |
| 1148 | * None. |
| 1149 | * |
| 1150 | *---------------------------------------------------------------------- |
| 1151 | */ |
| 1152 | |
| 1153 | NS_SOCKETint |
| 1154 | Ns_SockBinderListen(char type, const char *address, unsigned short port, int options) |
| 1155 | { |
| 1156 | NS_SOCKETint sock = NS_INVALID_SOCKET(-1); |
| 1157 | #ifndef _WIN32 |
| 1158 | ns_sockerrno_t err = 0; |
| 1159 | ssize_t n; |
| 1160 | char data[NS_IPADDR_SIZE46]; |
| 1161 | struct msghdr msg; |
| 1162 | struct iovec iov[4]; |
| 1163 | |
| 1164 | if (address == NULL((void*)0)) { |
| 1165 | address = NS_IP_UNSPECIFIED"::"; |
| 1166 | } |
| 1167 | |
| 1168 | /* |
| 1169 | * Build and send message. |
| 1170 | */ |
| 1171 | iov[0].iov_base = (void*) &options; |
Duplicate code detected | |
| 1172 | iov[0].iov_len = sizeof(options); |
| 1173 | iov[1].iov_base = (void*) &port; |
| 1174 | iov[1].iov_len = sizeof(port); |
| 1175 | iov[2].iov_base = (void*) &type; |
| 1176 | iov[2].iov_len = sizeof(type); |
| 1177 | iov[3].iov_base = (void*) data; |
| 1178 | iov[3].iov_len = sizeof(data); |
| 1179 | |
| 1180 | strncpy(data, address, sizeof(data)-1); |
| 1181 | memset(&msg, 0, sizeof(msg)); |
| 1182 | msg.msg_iov = iov; |
| 1183 | msg.msg_iovlen = 4; |
| 1184 | n = sendmsg(binderRequest[1], &msg, 0); |
| 1185 | if (n != REQUEST_SIZE(sizeof(int) + sizeof(int) + sizeof(int) + 46)) { |
| 1186 | Ns_Log(Error, "Ns_SockBinderListen: sendmsg() failed: sent %" PRIdz"zd" " bytes, '%s'", |
| 1187 | n, strerror(errno(*__errno_location ()))); |
| 1188 | return -1; |
| 1189 | } |
| 1190 | |
| 1191 | /* |
| 1192 | * Revive reply. |
| 1193 | */ |
| 1194 | iov[0].iov_base = (void*) &err; |
| 1195 | iov[0].iov_len = sizeof(int); |
| 1196 | memset(&msg, 0, sizeof(msg)); |
| 1197 | msg.msg_iov = iov; |
| 1198 | msg.msg_iovlen = 1; |
| 1199 | #ifdef HAVE_CMMSG1 |
| 1200 | msg.msg_control = (void *) data; |
| 1201 | msg.msg_controllen = sizeof(data); |
| 1202 | #else |
| 1203 | msg.msg_accrights = (void*) &sock; |
| 1204 | msg.msg_accrightslen = sizeof(sock); |
| 1205 | #endif |
| 1206 | n = recvmsg(binderResponse[0], &msg, 0); |
| 1207 | if (n != RESPONSE_SIZE(sizeof(int))) { |
| 1208 | Ns_Log(Error, "Ns_SockBinderListen: recvmsg() failed: recv %" PRIdz"zd" " bytes, '%s'", |
| 1209 | n, strerror(errno(*__errno_location ()))); |
| 1210 | return -1; |
| 1211 | } |
| 1212 | |
| 1213 | #ifdef HAVE_CMMSG1 |
| 1214 | { |
| 1215 | struct cmsghdr *c = CMSG_FIRSTHDR(&msg)((size_t) (&msg)->msg_controllen >= sizeof (struct cmsghdr ) ? (struct cmsghdr *) (&msg)->msg_control : (struct cmsghdr *) 0); |
| 1216 | if ((c != NULL((void*)0)) && c->cmsg_type == SCM_RIGHTSSCM_RIGHTS) { |
| 1217 | int *ptr; |
| 1218 | /* |
| 1219 | * Use memcpy to avoid alignment problems. |
| 1220 | */ |
| 1221 | memcpy(&ptr, CMSG_DATA(c)((c)->__cmsg_data), sizeof(int*)); |
| 1222 | sock = *ptr; |
| 1223 | } |
| 1224 | } |
| 1225 | #endif |
| 1226 | |
| 1227 | /* |
| 1228 | * Close-on-exec, while set in the binder process by default |
| 1229 | * with Ns_SockBind, is not transmitted in the sendmsg and |
| 1230 | * must be set again. |
| 1231 | */ |
| 1232 | |
| 1233 | if (sock != NS_INVALID_SOCKET(-1) && Ns_CloseOnExec(sock) != NS_OK) { |
| 1234 | (void)ns_sockcloseclose(sock); |
| 1235 | sock = NS_INVALID_SOCKET(-1); |
| 1236 | } |
| 1237 | if (err == 0) { |
| 1238 | Ns_Log(Notice, "Ns_SockBinderListen: listen(%s,%hu) = %d", |
| 1239 | address, port, sock); |
| 1240 | } else { |
| 1241 | Ns_SetSockErrno(err); |
| 1242 | sock = NS_INVALID_SOCKET(-1); |
| 1243 | Ns_Log(Error, "Ns_SockBinderListen: listen(%s,%hu) failed: '%s'", |
| 1244 | address, port, ns_sockstrerrorstrerror(ns_sockerrno(*__errno_location ()))); |
| 1245 | } |
| 1246 | #endif /* _WIN32 */ |
| 1247 | return sock; |
| 1248 | } |
| 1249 | |
| 1250 | |
| 1251 | /* |
| 1252 | *---------------------------------------------------------------------- |
| 1253 | * |
| 1254 | * NsForkBinder -- |
| 1255 | * |
| 1256 | * Fork of the bind/listen process. This routine is called |
| 1257 | * by main() when the server starts as root. |
| 1258 | * |
| 1259 | * Results: |
| 1260 | * None. |
| 1261 | * |
| 1262 | * Side effects: |
| 1263 | * |
| 1264 | * The binderRunning, binderRequest, binderResponse static |
| 1265 | * variables are updated. |
| 1266 | * |
| 1267 | *---------------------------------------------------------------------- |
| 1268 | */ |
| 1269 | |
| 1270 | void |
| 1271 | NsForkBinder(void) |
| 1272 | { |
| 1273 | #ifndef _WIN32 |
| 1274 | pid_t pid1; |
| 1275 | int status; |
| 1276 | |
| 1277 | /* |
| 1278 | * Create two socket pipes, one for sending the request and one for |
| 1279 | * receiving the response. |
| 1280 | */ |
| 1281 | |
| 1282 | if (ns_sockpair(binderRequest) != 0 || ns_sockpair(binderResponse) != 0) { |
| 1283 | Ns_Fatal("NsForkBinder: ns_sockpair() failed: '%s'", strerror(errno(*__errno_location ()))); |
| 1284 | } |
| 1285 | |
| 1286 | /* |
| 1287 | * Double-fork and run as a binder until the socket pairs are |
| 1288 | * closed. The server double forks to avoid problems waiting for a |
| 1289 | * child root process after the parent does a setuid(), something |
| 1290 | * which appears to confuse the process-based Linux and SGI threads. |
| 1291 | */ |
| 1292 | |
| 1293 | pid1 = ns_fork(); |
| 1294 | if (pid1 < 0) { |
| 1295 | Ns_Fatal("NsForkBinder: fork() failed: '%s'", strerror(errno(*__errno_location ()))); |
| 1296 | |
| 1297 | } else if (pid1 == 0) { |
| 1298 | pid_t pid2; |
| 1299 | |
| 1300 | pid2 = ns_fork(); |
| 1301 | if (pid2 < 0) { |
| 1302 | Ns_Fatal("NsForkBinder: fork() failed: '%s'", strerror(errno(*__errno_location ()))); |
| 1303 | } else if (pid2 == 0) { |
| 1304 | /* |
| 1305 | * Grandchild process. |
| 1306 | */ |
| 1307 | (void)ns_sockcloseclose(binderRequest[1]); |
| 1308 | (void)ns_sockcloseclose(binderResponse[0]); |
| 1309 | Binder(); |
| 1310 | } else { |
| 1311 | /* |
| 1312 | * Child process. |
| 1313 | */ |
| 1314 | } |
| 1315 | exit(0); |
| 1316 | |
| 1317 | } else { |
| 1318 | /* |
| 1319 | * Parent process. |
| 1320 | */ |
| 1321 | if (Ns_WaitForProcess(pid1, &status) != NS_OK) { |
| 1322 | Ns_Fatal("NsForkBinder: Ns_WaitForProcess(%d) failed: '%s'", |
| 1323 | pid1, strerror(errno(*__errno_location ()))); |
| 1324 | } else if (status != 0) { |
| 1325 | Ns_Fatal("NsForkBinder: process %d exited with nonzero status: %d", |
| 1326 | pid1, status); |
| 1327 | } |
| 1328 | binderRunning = NS_TRUE1; |
| 1329 | } |
| 1330 | #endif /* _WIN32 */ |
| 1331 | } |
| 1332 | |
| 1333 | |
| 1334 | /* |
| 1335 | *---------------------------------------------------------------------- |
| 1336 | * |
| 1337 | * NsStopBinder -- |
| 1338 | * |
| 1339 | * Close the socket to the binder after startup. This is done |
| 1340 | * to avoid a possible security risk of binding to privileged |
| 1341 | * ports after startup. |
| 1342 | * |
| 1343 | * Results: |
| 1344 | * None. |
| 1345 | * |
| 1346 | * Side effects: |
| 1347 | * Binder process will exit. |
| 1348 | * |
| 1349 | *---------------------------------------------------------------------- |
| 1350 | */ |
| 1351 | |
| 1352 | void |
| 1353 | NsStopBinder(void) |
| 1354 | { |
| 1355 | if (binderRunning) { |
| 1356 | (void)ns_sockcloseclose(binderRequest[1]); |
| 1357 | (void)ns_sockcloseclose(binderResponse[0]); |
| 1358 | (void)ns_sockcloseclose(binderRequest[0]); |
| 1359 | (void)ns_sockcloseclose(binderResponse[1]); |
| 1360 | binderRunning = NS_FALSE0; |
| 1361 | } |
| 1362 | } |
| 1363 | |
| 1364 | |
| 1365 | /* |
| 1366 | *---------------------------------------------------------------------- |
| 1367 | * |
| 1368 | * Binder -- |
| 1369 | * |
| 1370 | * Child process bind/listen loop. |
| 1371 | * |
| 1372 | * Results: |
| 1373 | * None. |
| 1374 | * |
| 1375 | * Side effects: |
| 1376 | * Sockets are created and sent to the parent on request. |
| 1377 | * |
| 1378 | *---------------------------------------------------------------------- |
| 1379 | */ |
| 1380 | |
| 1381 | #ifndef _WIN32 |
| 1382 | static void |
| 1383 | Binder(void) |
| 1384 | { |
| 1385 | int options, err, sock; |
| 1386 | unsigned short port; |
| 1387 | ssize_t n; |
| 1388 | char type, address[NS_IPADDR_SIZE46]; |
| 1389 | struct msghdr msg; |
| 1390 | struct iovec iov[4]; |
| 1391 | |
| 1392 | #ifdef HAVE_CMMSG1 |
| 1393 | struct cmsghdr *c; |
| 1394 | #endif |
| 1395 | |
| 1396 | Ns_Log(Notice, "binder: started"); |
| 1397 | Ns_ThreadSetName("binder"); |
| 1398 | |
| 1399 | /* |
| 1400 | * Endlessly listen for socket bind requests. |
| 1401 | */ |
| 1402 | |
| 1403 | for (;;) { |
| 1404 | /* |
| 1405 | * Receive a message with the following contents. |
| 1406 | */ |
| 1407 | iov[0].iov_base = (void*) &options; |
Similar code here | |
| 1408 | iov[0].iov_len = sizeof(options); |
| 1409 | iov[1].iov_base = (void*) &port; |
| 1410 | iov[1].iov_len = sizeof(port); |
| 1411 | iov[2].iov_base = (void*) &type; |
| 1412 | iov[2].iov_len = sizeof(type); |
| 1413 | iov[3].iov_base = (void*) address; |
| 1414 | iov[3].iov_len = sizeof(address); |
| 1415 | memset(&msg, 0, sizeof(msg)); |
| 1416 | msg.msg_iov = iov; |
| 1417 | msg.msg_iovlen = 4; |
| 1418 | options = 0; |
| 1419 | port = 0u; |
| 1420 | type = '\0'; |
| 1421 | err = 0; |
| 1422 | do { |
| 1423 | n = recvmsg(binderRequest[0], &msg, 0); |
| 1424 | } while (n == -1 && errno(*__errno_location ()) == NS_EINTR4); |
| 1425 | if (n == 0) { |
| 1426 | break; |
| 1427 | } |
| 1428 | if (n != REQUEST_SIZE(sizeof(int) + sizeof(int) + sizeof(int) + 46)) { |
| 1429 | Ns_Fatal("binder: recvmsg() failed: recv %" PRIdz"zd" " bytes, '%s'", n, strerror(errno(*__errno_location ()))); |
| 1430 | } |
| 1431 | |
| 1432 | /* |
| 1433 | * NB: Due to a bug in Solaris the child process must |
| 1434 | * call both bind() and listen() before returning the |
| 1435 | * socket. All other Unix versions would actually allow |
| 1436 | * just performing the bind() in the child and allowing |
| 1437 | * the parent to perform the listen(). |
| 1438 | */ |
| 1439 | switch (type) { |
| 1440 | case 'U': |
| 1441 | sock = Ns_SockListenUdp(address, port, NS_FALSE0); |
| 1442 | break; |
| 1443 | case 'D': |
| 1444 | sock = Ns_SockListenUnix(address, options, port); |
| 1445 | break; |
| 1446 | case 'R': |
| 1447 | sock = Ns_SockListenRaw(options); |
| 1448 | break; |
| 1449 | case 'T': |
| 1450 | default: |
| 1451 | sock = Ns_SockListenEx(address, port, options, NS_FALSE0); |
| 1452 | } |
| 1453 | Ns_Log(Notice, "bind type %c addr %s port %d options %d to socket %d", |
| 1454 | type, address, port, options, sock); |
| 1455 | |
| 1456 | if (sock < 0) { |
| 1457 | err = errno(*__errno_location ()); |
| 1458 | } |
| 1459 | |
| 1460 | iov[0].iov_base = (void*) &err; |
| 1461 | iov[0].iov_len = sizeof(err); |
| 1462 | memset(&msg, 0, sizeof(msg)); |
| 1463 | msg.msg_iov = iov; |
| 1464 | msg.msg_iovlen = 1; |
| 1465 | |
| 1466 | if (sock != -1) { |
| 1467 | #ifdef HAVE_CMMSG1 |
| 1468 | int *pfd; |
| 1469 | |
| 1470 | msg.msg_control = address; |
| 1471 | msg.msg_controllen = sizeof(address); |
| 1472 | c = CMSG_FIRSTHDR(&msg)((size_t) (&msg)->msg_controllen >= sizeof (struct cmsghdr ) ? (struct cmsghdr *) (&msg)->msg_control : (struct cmsghdr *) 0); |
| 1473 | c->cmsg_level = SOL_SOCKET1; |
| 1474 | c->cmsg_type = SCM_RIGHTSSCM_RIGHTS; |
| 1475 | /* |
| 1476 | * Use memcpy to avoid alignment problems. |
| 1477 | */ |
| 1478 | memcpy(&pfd, CMSG_DATA(c)((c)->__cmsg_data), sizeof(int*)); |
| 1479 | |
| 1480 | *pfd = sock; |
| 1481 | c->cmsg_len = CMSG_LEN(sizeof(int))((((sizeof (struct cmsghdr)) + sizeof (size_t) - 1) & (size_t ) ~(sizeof (size_t) - 1)) + (sizeof(int))); |
| 1482 | msg.msg_controllen = c->cmsg_len; |
| 1483 | #else |
| 1484 | msg.msg_accrights = (void*) &sock; |
| 1485 | msg.msg_accrightslen = sizeof(sock); |
| 1486 | #endif |
| 1487 | } |
| 1488 | |
| 1489 | do { |
| 1490 | n = sendmsg(binderResponse[1], &msg, 0); |
| 1491 | } while (n == -1 && errno(*__errno_location ()) == NS_EINTR4); |
| 1492 | if (n != RESPONSE_SIZE(sizeof(int))) { |
| 1493 | Ns_Fatal("binder: sendmsg() failed: sent %" PRIdz"zd" " bytes, '%s'", n, strerror(errno(*__errno_location ()))); |
| 1494 | } |
| 1495 | if (sock != -1) { |
| 1496 | /* |
| 1497 | * Close the socket as it won't be needed in the child. |
| 1498 | */ |
| 1499 | (void)ns_sockcloseclose(sock); |
| 1500 | } |
| 1501 | } |
| 1502 | Ns_Log(Notice, "binder: stopped"); |
| 1503 | } |
| 1504 | #endif /* _WIN32 */ |
| 1505 | |
| 1506 | /* |
| 1507 | * Local Variables: |
| 1508 | * mode: c |
| 1509 | * c-basic-offset: 4 |
| 1510 | * fill-column: 72 |
| 1511 | * indent-tabs-mode: nil |
| 1512 | * End: |
| 1513 | */ |