src/ipc_win32.cc

   1 /*
   2  * DEBUG: section 54    Windows Interprocess Communication
   3  * AUTHOR: Andrey Shorin <tolsty@tushino.com>
   4  * AUTHOR: Guido Serassio <serassio@squid-cache.org>
   5  *
   6  * SQUID Web Proxy Cache          http://www.squid-cache.org/
   7  * ----------------------------------------------------------
   8  *
   9  *  Squid is the result of efforts by numerous individuals from
  10  *  the Internet community; see the CONTRIBUTORS file for full
  11  *  details.   Many organizations have provided support for Squid's
  12  *  development; see the SPONSORS file for full details.  Squid is
  13  *  Copyrighted (C) 2001 by the Regents of the University of
  14  *  California; see the COPYRIGHT file for full details.  Squid
  15  *  incorporates software developed and/or copyrighted by other
  16  *  sources; see the CREDITS file for full details.
  17  *
  18  *  This program is free software; you can redistribute it and/or modify
  19  *  it under the terms of the GNU General Public License as published by
  20  *  the Free Software Foundation; either version 2 of the License, or
  21  *  (at your option) any later version.
  22  *
  23  *  This program is distributed in the hope that it will be useful,
  24  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  *  GNU General Public License for more details.
  27  *
  28  *  You should have received a copy of the GNU General Public License
  29  *  along with this program; if not, write to the Free Software
  30  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  31  *
  32  */
  33
  34 #include "squid.h"
  35 #include "cache_cf.h"
  36 #include "comm.h"
  37 #include "fd.h"
  38 #include "fde.h"
  39 #include "ip/Address.h"
  40 #include "rfc1738.h"
  41 #include "SquidConfig.h"
  42 #include "SquidIpc.h"
  43 #include "SquidTime.h"
  44 #include "tools.h"
  45
  46 #ifndef _MSWSOCK_
  47 #include <mswsock.h>
  48 #endif
  49 #include <process.h>
  50 #if HAVE_ERRNO_H
  51 #include <errno.h>
  52 #endif
  53
  54 struct ipc_params {
  55     int type;
  56     int crfd;
  57     int cwfd;
  58     Ip::Address local_addr;
  59     struct addrinfo PS;
  60     const char *prog;
  61     char **args;
  62 };
  63
  64 struct thread_params {
  65     int type;
  66     int rfd;
  67     int send_fd;
  68     const char *prog;
  69     pid_t pid;
  70 };
  71
  72 static unsigned int __stdcall ipc_thread_1(void *params);
  73 static unsigned int __stdcall ipc_thread_2(void *params);
  74
  75 static const char *ok_string = "OK\n";
  76 static const char *err_string = "ERR\n";
  77 static const char *shutdown_string = "$shutdown\n";
  78
  79 static const char *hello_string = "hi there\n";
  80 #define HELLO_BUF_SZ 32
  81 static char hello_buf[HELLO_BUF_SZ];
  82
  83 static int
  84 ipcCloseAllFD(int prfd, int pwfd, int crfd, int cwfd)
  85 {
  86     if (prfd >= 0)
  87         comm_close(prfd);
  88
  89     if (prfd != pwfd)
  90         if (pwfd >= 0)
  91             comm_close(pwfd);
  92
  93     if (crfd >= 0)
  94         comm_close(crfd);
  95
  96     if (crfd != cwfd)
  97         if (cwfd >= 0)
  98             comm_close(cwfd);
  99
 100     return -1;
 101 }
 102
 103 static void
 104 PutEnvironment()
 105 {
 106 #if HAVE_PUTENV
 107     char *env_str;
 108     int tmp_s;
 109     env_str = (char *)xcalloc((tmp_s = strlen(Debug::debugOptions) + 32), 1);
 110     snprintf(env_str, tmp_s, "SQUID_DEBUG=%s", Debug::debugOptions);
 111     putenv(env_str);
 112 #endif
 113 }
 114
 115 pid_t
 116 ipcCreate(int type, const char *prog, const char *const args[], const char *name, Ip::Address &local_addr, int *rfd, int *wfd, void **hIpc)
 117 {
 118     unsigned long thread;
 119
 120     struct ipc_params params;
 121     int opt;
 122     int optlen = sizeof(opt);
 123     DWORD ecode = 0;
 124     pid_t pid;
 125
 126     Ip::Address tmp_addr;
 127     struct addrinfo *aiCS = NULL;
 128     struct addrinfo *aiPS = NULL;
 129
 130     int crfd = -1;
 131     int prfd = -1;
 132     int cwfd = -1;
 133     int pwfd = -1;
 134     int x;
 135
 136     requirePathnameExists(name, prog);
 137
 138     if (rfd)
 139         *rfd = -1;
 140
 141     if (wfd)
 142         *wfd = -1;
 143
 144     if (hIpc)
 145         *hIpc = NULL;
 146
 147     if (WIN32_OS_version != _WIN_OS_WINNT) {
 148         getsockopt(INVALID_SOCKET, SOL_SOCKET, SO_OPENTYPE, (char *) &opt, &optlen);
 149         opt = opt & ~(SO_SYNCHRONOUS_NONALERT | SO_SYNCHRONOUS_ALERT);
 150         setsockopt(INVALID_SOCKET, SOL_SOCKET, SO_OPENTYPE, (char *) &opt, sizeof(opt));
 151     }
 152
 153     if (type == IPC_TCP_SOCKET) {
 154         crfd = cwfd = comm_open(SOCK_STREAM,
 155                                 IPPROTO_TCP,
 156                                 local_addr,
 157                                 COMM_NOCLOEXEC,
 158                                 name);
 159         prfd = pwfd = comm_open(SOCK_STREAM,
 160                                 IPPROTO_TCP,    /* protocol */
 161                                 local_addr,
 162                                 0,                      /* blocking */
 163                                 name);
 164     } else if (type == IPC_UDP_SOCKET) {
 165         crfd = cwfd = comm_open(SOCK_DGRAM,
 166                                 IPPROTO_UDP,
 167                                 local_addr,
 168                                 COMM_NOCLOEXEC,
 169                                 name);
 170         prfd = pwfd = comm_open(SOCK_DGRAM,
 171                                 IPPROTO_UDP,
 172                                 local_addr,
 173                                 0,
 174                                 name);
 175     } else if (type == IPC_FIFO) {
 176         debugs(54, DBG_CRITICAL, "ipcCreate: " << prog << ": use IPC_TCP_SOCKET instead of IP_FIFO on Windows");
 177         assert(0);
 178     } else {
 179         assert(IPC_NONE);
 180     }
 181
 182     debugs(54, 3, "ipcCreate: prfd FD " << prfd);
 183     debugs(54, 3, "ipcCreate: pwfd FD " << pwfd);
 184     debugs(54, 3, "ipcCreate: crfd FD " << crfd);
 185     debugs(54, 3, "ipcCreate: cwfd FD " << cwfd);
 186
 187     if (WIN32_OS_version != _WIN_OS_WINNT) {
 188         getsockopt(INVALID_SOCKET, SOL_SOCKET, SO_OPENTYPE, (char *) &opt, &optlen);
 189         opt = opt | SO_SYNCHRONOUS_NONALERT;
 190         setsockopt(INVALID_SOCKET, SOL_SOCKET, SO_OPENTYPE, (char *) &opt, optlen);
 191     }
 192
 193     if (crfd < 0) {
 194         debugs(54, DBG_CRITICAL, "ipcCreate: Failed to create child FD.");
 195         return ipcCloseAllFD(prfd, pwfd, crfd, cwfd);
 196     }
 197
 198     if (pwfd < 0) {
 199         debugs(54, DBG_CRITICAL, "ipcCreate: Failed to create server FD.");
 200         return ipcCloseAllFD(prfd, pwfd, crfd, cwfd);
 201     }
 202
 203 // AYJ: these flags should be neutral, but if not IPv6 version needs adding
 204     if (type == IPC_TCP_SOCKET || type == IPC_UDP_SOCKET) {
 205
 206         tmp_addr.InitAddrInfo(aiPS);
 207
 208         if (getsockname(pwfd, aiPS->ai_addr, &(aiPS->ai_addrlen) ) < 0) {
 209             debugs(54, DBG_CRITICAL, "ipcCreate: getsockname: " << xstrerror());
 210             return ipcCloseAllFD(prfd, pwfd, crfd, cwfd);
 211         }
 212
 213         tmp_addr = *aiPS;
 214
 215         debugs(54, 3, "ipcCreate: FD " << pwfd << " sockaddr " << tmp_addr );
 216
 217         tmp_addr.InitAddrInfo(aiCS);
 218
 219         if (getsockname(crfd, aiCS->ai_addr, &(aiCS->ai_addrlen) ) < 0) {
 220             debugs(54, DBG_CRITICAL, "ipcCreate: getsockname: " << xstrerror());
 221             return ipcCloseAllFD(prfd, pwfd, crfd, cwfd);
 222         }
 223
 224         tmp_addr.SetEmpty();
 225         tmp_addr = *aiCS;
 226
 227         debugs(54, 3, "ipcCreate: FD " << crfd << " sockaddr " << tmp_addr );
 228     }
 229
 230     if (type == IPC_TCP_SOCKET) {
 231         if (listen(crfd, 1) < 0) {
 232             debugs(54, DBG_IMPORTANT, "ipcCreate: listen FD " << crfd << ": " << xstrerror());
 233             return ipcCloseAllFD(prfd, pwfd, crfd, cwfd);
 234         }
 235
 236         debugs(54, 3, "ipcCreate: FD " << crfd << " listening...");
 237     }
 238
 239     /* flush or else we get dup data if unbuffered_logs is set */
 240     logsFlush();
 241
 242     params.type = type;
 243
 244     params.crfd = crfd;
 245
 246     params.cwfd = cwfd;
 247
 248     params.PS = *aiPS;
 249
 250     params.local_addr = local_addr;
 251
 252     params.prog = prog;
 253
 254     params.args = (char **) args;
 255
 256     thread = _beginthreadex(NULL, 0, ipc_thread_1, &params, 0, NULL);
 257
 258     if (thread == 0) {
 259         debugs(54, DBG_IMPORTANT, "ipcCreate: _beginthread: " << xstrerror());
 260         return ipcCloseAllFD(prfd, pwfd, crfd, cwfd);
 261     }
 262
 263     /* NP: tmp_addr was left with eiether empty or aiCS in Ip::Address format */
 264     if (comm_connect_addr(pwfd, tmp_addr) == COMM_ERROR) {
 265         CloseHandle((HANDLE) thread);
 266         return ipcCloseAllFD(prfd, pwfd, -1, -1);
 267     }
 268
 269     memset(hello_buf, '\0', HELLO_BUF_SZ);
 270     x = recv(prfd, (void *)hello_buf, HELLO_BUF_SZ - 1, 0);
 271
 272     if (x < 0) {
 273         debugs(54, DBG_CRITICAL, "ipcCreate: PARENT: hello read test failed");
 274         debugs(54, DBG_CRITICAL, "--> read: " << xstrerror());
 275         CloseHandle((HANDLE) thread);
 276         return ipcCloseAllFD(prfd, pwfd, -1, -1);
 277     } else if (strcmp(hello_buf, hello_string)) {
 278         debugs(54, DBG_CRITICAL, "ipcCreate: PARENT: hello read test failed");
 279         debugs(54, DBG_CRITICAL, "--> read returned " << x);
 280         debugs(54, DBG_CRITICAL, "--> got '" << rfc1738_escape(hello_buf) << "'");
 281         CloseHandle((HANDLE) thread);
 282         return ipcCloseAllFD(prfd, pwfd, -1, -1);
 283     }
 284
 285     x = send(pwfd, (const void *)ok_string, strlen(ok_string), 0);
 286
 287     if (x < 0) {
 288         debugs(54, DBG_CRITICAL, "ipcCreate: PARENT: OK write test failed");
 289         debugs(54, DBG_CRITICAL, "--> read: " << xstrerror());
 290         CloseHandle((HANDLE) thread);
 291         return ipcCloseAllFD(prfd, pwfd, -1, -1);
 292     }
 293
 294     memset(hello_buf, '\0', HELLO_BUF_SZ);
 295     x = recv(prfd, (void *)hello_buf, HELLO_BUF_SZ - 1, 0);
 296
 297     if (x < 0) {
 298         debugs(54, DBG_CRITICAL, "ipcCreate: PARENT: OK read test failed");
 299         debugs(54, DBG_CRITICAL, "--> read: " << xstrerror());
 300         CloseHandle((HANDLE) thread);
 301         return ipcCloseAllFD(prfd, pwfd, -1, -1);
 302     } else if (!strcmp(hello_buf, err_string)) {
 303         debugs(54, DBG_CRITICAL, "ipcCreate: PARENT: OK read test failed");
 304         debugs(54, DBG_CRITICAL, "--> read returned " << x);
 305         debugs(54, DBG_CRITICAL, "--> got '" << rfc1738_escape(hello_buf) << "'");
 306         CloseHandle((HANDLE) thread);
 307         return ipcCloseAllFD(prfd, pwfd, -1, -1);
 308     }
 309
 310     hello_buf[x] = '\0';
 311     pid = atol(hello_buf);
 312     commUnsetFdTimeout(prfd);
 313     commSetNonBlocking(prfd);
 314     commSetNonBlocking(pwfd);
 315     commSetCloseOnExec(prfd);
 316     commSetCloseOnExec(pwfd);
 317
 318     if (rfd)
 319         *rfd = prfd;
 320
 321     if (wfd)
 322         *wfd = pwfd;
 323
 324     fd_table[prfd].flags.ipc = true;
 325     fd_table[pwfd].flags.ipc = true;
 326     fd_table[crfd].flags.ipc = true;
 327     fd_table[cwfd].flags.ipc = true;
 328
 329     if (Config.sleep_after_fork) {
 330         /* XXX emulation of usleep() */
 331         DWORD sl;
 332         sl = Config.sleep_after_fork / 1000;
 333
 334         if (sl == 0)
 335             sl = 1;
 336
 337         Sleep(sl);
 338     }
 339
 340     if (GetExitCodeThread((HANDLE) thread, &ecode) && ecode == STILL_ACTIVE) {
 341         if (hIpc)
 342             *hIpc = (HANDLE) thread;
 343
 344         return pid;
 345     } else {
 346         CloseHandle((HANDLE) thread);
 347         return ipcCloseAllFD(prfd, pwfd, -1, -1);
 348     }
 349 }
 350
 351 static int
 352 ipcSend(int cwfd, const char *buf, int len)
 353 {
 354     int x;
 355
 356     x = send(cwfd, (const void *)buf, len, 0);
 357
 358     if (x < 0) {
 359         debugs(54, DBG_CRITICAL, "sendto FD " << cwfd << ": " << xstrerror());
 360         debugs(54, DBG_CRITICAL, "ipcCreate: CHILD: hello write test failed");
 361     }
 362
 363     return x;
 364 }
 365
 366 static unsigned int __stdcall
 367 ipc_thread_1(void *in_params)
 368 {
 369     int t1, t2, t3, retval = -1;
 370     int p2c[2] = {-1, -1};
 371     int c2p[2] = {-1, -1};
 372     HANDLE hProcess = NULL, thread = NULL;
 373     pid_t pid = -1;
 374
 375     struct thread_params thread_params;
 376     ssize_t x;
 377     int fd = -1;
 378     char *str;
 379     STARTUPINFO si;
 380     PROCESS_INFORMATION pi;
 381     long F;
 382     int prfd_ipc = -1, pwfd_ipc = -1, crfd_ipc = -1, cwfd_ipc = -1;
 383     char *prog = NULL, *buf1 = NULL;
 384
 385     Ip::Address PS_ipc;
 386     Ip::Address CS_ipc;
 387     struct addrinfo *aiPS_ipc = NULL;
 388     struct addrinfo *aiCS_ipc = NULL;
 389
 390     struct ipc_params *params = (struct ipc_params *) in_params;
 391     int type = params->type;
 392     int crfd = params->crfd;
 393     int cwfd = params->cwfd;
 394     char **args = params->args;
 395
 396     Ip::Address PS = params->PS;
 397     Ip::Address local_addr = params->local_addr;
 398
 399     buf1 = (char *)xcalloc(1, 8192);
 400     strcpy(buf1, params->prog);
 401     prog = strtok(buf1, w_space);
 402
 403     if ((str = strrchr(prog, '/')))
 404         prog = ++str;
 405
 406     if ((str = strrchr(prog, '\\')))
 407         prog = ++str;
 408
 409     prog = xstrdup(prog);
 410
 411     if (type == IPC_TCP_SOCKET) {
 412         debugs(54, 3, "ipcCreate: calling accept on FD " << crfd);
 413
 414         if ((fd = accept(crfd, NULL, NULL)) < 0) {
 415             debugs(54, DBG_CRITICAL, "ipcCreate: FD " << crfd << " accept: " << xstrerror());
 416             goto cleanup;
 417         }
 418
 419         debugs(54, 3, "ipcCreate: CHILD accepted new FD " << fd);
 420         comm_close(crfd);
 421         snprintf(buf1, 8191, "%s CHILD socket", prog);
 422         fd_open(fd, FD_SOCKET, buf1);
 423         fd_table[fd].flags.ipc = 1;
 424         cwfd = crfd = fd;
 425     } else if (type == IPC_UDP_SOCKET) {
 426         if (comm_connect_addr(crfd, params->PS) == COMM_ERROR)
 427             goto cleanup;
 428     }
 429
 430     x = send(cwfd, (const void *)hello_string, strlen(hello_string) + 1, 0);
 431
 432     if (x < 0) {
 433         debugs(54, DBG_CRITICAL, "sendto FD " << cwfd << ": " << xstrerror());
 434         debugs(54, DBG_CRITICAL, "ipcCreate: CHILD: hello write test failed");
 435         goto cleanup;
 436     }
 437
 438     PutEnvironment();
 439     memset(buf1, '\0', sizeof(buf1));
 440     x = recv(crfd, (void *)buf1, 8191, 0);
 441
 442     if (x < 0) {
 443         debugs(54, DBG_CRITICAL, "ipcCreate: CHILD: OK read test failed");
 444         debugs(54, DBG_CRITICAL, "--> read: " << xstrerror());
 445         goto cleanup;
 446     } else if (strcmp(buf1, ok_string)) {
 447         debugs(54, DBG_CRITICAL, "ipcCreate: CHILD: OK read test failed");
 448         debugs(54, DBG_CRITICAL, "--> read returned " << x);
 449         debugs(54, DBG_CRITICAL, "--> got '" << rfc1738_escape(hello_buf) << "'");
 450         goto cleanup;
 451     }
 452
 453     /* assign file descriptors to child process */
 454     if (_pipe(p2c, 1024, _O_BINARY | _O_NOINHERIT) < 0) {
 455         debugs(54, DBG_CRITICAL, "ipcCreate: CHILD: pipe: " << xstrerror());
 456         ipcSend(cwfd, err_string, strlen(err_string));
 457         goto cleanup;
 458     }
 459
 460     if (_pipe(c2p, 1024, _O_BINARY | _O_NOINHERIT) < 0) {
 461         debugs(54, DBG_CRITICAL, "ipcCreate: CHILD: pipe: " << xstrerror());
 462         ipcSend(cwfd, err_string, strlen(err_string));
 463         goto cleanup;
 464     }
 465
 466     if (type == IPC_UDP_SOCKET) {
 467         snprintf(buf1, 8192, "%s(%ld) <-> ipc CHILD socket", prog, -1L);
 468         crfd_ipc = cwfd_ipc = comm_open(SOCK_DGRAM, IPPROTO_UDP, local_addr, 0, buf1);
 469
 470         if (crfd_ipc < 0) {
 471             debugs(54, DBG_CRITICAL, "ipcCreate: CHILD: Failed to create child FD for " << prog << ".");
 472             ipcSend(cwfd, err_string, strlen(err_string));
 473             goto cleanup;
 474         }
 475
 476         snprintf(buf1, 8192, "%s(%ld) <-> ipc PARENT socket", prog, -1L);
 477         prfd_ipc = pwfd_ipc = comm_open(SOCK_DGRAM, IPPROTO_UDP, local_addr, 0, buf1);
 478
 479         if (pwfd_ipc < 0) {
 480             debugs(54, DBG_CRITICAL, "ipcCreate: CHILD: Failed to create server FD for " << prog << ".");
 481             ipcSend(cwfd, err_string, strlen(err_string));
 482             goto cleanup;
 483         }
 484
 485         PS_ipc.InitAddrInfo(aiPS_ipc);
 486
 487         if (getsockname(pwfd_ipc, aiPS_ipc->ai_addr, &(aiPS_ipc->ai_addrlen)) < 0) {
 488             debugs(54, DBG_CRITICAL, "ipcCreate: getsockname: " << xstrerror());
 489             ipcSend(cwfd, err_string, strlen(err_string));
 490             goto cleanup;
 491         }
 492
 493         PS_ipc = *aiPS_ipc;
 494
 495         debugs(54, 3, "ipcCreate: FD " << pwfd_ipc << " sockaddr " << PS_ipc);
 496
 497         CS_ipc.InitAddrInfo(aiCS_ipc);
 498
 499         if (getsockname(crfd_ipc, aiCS_ipc->ai_addr, &(aiCS_ipc->ai_addrlen)) < 0) {
 500             debugs(54, DBG_CRITICAL, "ipcCreate: getsockname: " << xstrerror());
 501             ipcSend(cwfd, err_string, strlen(err_string));
 502             goto cleanup;
 503         }
 504
 505         CS_ipc = *aiCS_ipc;
 506
 507         debugs(54, 3, "ipcCreate: FD " << crfd_ipc << " sockaddr " << CS_ipc);
 508
 509         if (comm_connect_addr(pwfd_ipc, CS_ipc) == COMM_ERROR) {
 510             ipcSend(cwfd, err_string, strlen(err_string));
 511             goto cleanup;
 512         }
 513
 514         fd = crfd;
 515
 516         if (comm_connect_addr(crfd_ipc, PS_ipc) == COMM_ERROR) {
 517             ipcSend(cwfd, err_string, strlen(err_string));
 518             goto cleanup;
 519         }
 520     }                           /* IPC_UDP_SOCKET */
 521
 522     t1 = dup(0);
 523
 524     t2 = dup(1);
 525
 526     t3 = dup(2);
 527
 528     dup2(c2p[0], 0);
 529
 530     dup2(p2c[1], 1);
 531
 532     dup2(fileno(debug_log), 2);
 533
 534     close(c2p[0]);
 535
 536     close(p2c[1]);
 537
 538     commUnsetNonBlocking(fd);
 539
 540     memset(&si, 0, sizeof(STARTUPINFO));
 541
 542     si.cb = sizeof(STARTUPINFO);
 543
 544     si.hStdInput = (HANDLE) _get_osfhandle(0);
 545
 546     si.hStdOutput = (HANDLE) _get_osfhandle(1);
 547
 548     si.hStdError = (HANDLE) _get_osfhandle(2);
 549
 550     si.dwFlags = STARTF_USESTDHANDLES;
 551
 552     /* Make sure all other valid handles are not inerithable */
 553     for (x = 3; x < Squid_MaxFD; ++x) {
 554         if ((F = _get_osfhandle(x)) == -1)
 555             continue;
 556
 557         SetHandleInformation((HANDLE) F, HANDLE_FLAG_INHERIT, 0);
 558     }
 559
 560     *buf1 = '\0';
 561     strcpy(buf1 + 4096, params->prog);
 562     str = strtok(buf1 + 4096, w_space);
 563
 564     do {
 565         strcat(buf1, str);
 566         strcat(buf1, " ");
 567     } while ((str = strtok(NULL, w_space)));
 568
 569     x = 1;
 570
 571     while (args[x]) {
 572         strcat(buf1, args[x]);
 573         ++x;
 574         strcat(buf1, " ");
 575     }
 576
 577     if (CreateProcess(buf1 + 4096, buf1, NULL, NULL, TRUE, CREATE_NO_WINDOW,
 578                       NULL, NULL, &si, &pi)) {
 579         pid = pi.dwProcessId;
 580         hProcess = pi.hProcess;
 581     } else {
 582         pid = -1;
 583         x = GetLastError();
 584     }
 585
 586     dup2(t1, 0);
 587     dup2(t2, 1);
 588     dup2(t3, 2);
 589     close(t1);
 590     close(t2);
 591     close(t3);
 592
 593     if (pid == -1) {
 594         errno = x;
 595         debugs(54, DBG_CRITICAL, "ipcCreate: CHILD: " << params->prog << ": " << xstrerror());
 596
 597         ipcSend(cwfd, err_string, strlen(err_string));
 598         goto cleanup;
 599     }
 600
 601     if (type == IPC_UDP_SOCKET) {
 602         WSAPROTOCOL_INFO wpi;
 603
 604         memset(&wpi, 0, sizeof(wpi));
 605
 606         if (SOCKET_ERROR == WSADuplicateSocket(crfd_ipc, pid, &wpi)) {
 607             debugs(54, DBG_CRITICAL, "ipcCreate: CHILD: WSADuplicateSocket: " << xstrerror());
 608
 609             ipcSend(cwfd, err_string, strlen(err_string));
 610             goto cleanup;
 611         }
 612
 613         x = write(c2p[1], (const char *) &wpi, sizeof(wpi));
 614
 615         if (x < (ssize_t)sizeof(wpi)) {
 616             debugs(54, DBG_CRITICAL, "ipcCreate: CHILD: write FD " << c2p[1] << ": " << xstrerror());
 617             debugs(54, DBG_CRITICAL, "ipcCreate: CHILD: " << prog << ": socket exchange failed");
 618
 619             ipcSend(cwfd, err_string, strlen(err_string));
 620             goto cleanup;
 621         }
 622
 623         x = read(p2c[0], buf1, 8192);
 624
 625         if (x < 0) {
 626             debugs(54, DBG_CRITICAL, "ipcCreate: CHILD: read FD " << p2c[0] << ": " << xstrerror());
 627             debugs(54, DBG_CRITICAL, "ipcCreate: CHILD: " << prog << ": socket exchange failed");
 628
 629             ipcSend(cwfd, err_string, strlen(err_string));
 630             goto cleanup;
 631         } else if (strncmp(buf1, ok_string, strlen(ok_string))) {
 632             debugs(54, DBG_CRITICAL, "ipcCreate: CHILD: " << prog << ": socket exchange failed");
 633             debugs(54, DBG_CRITICAL, "--> read returned " << x);
 634             buf1[x] = '\0';
 635             debugs(54, DBG_CRITICAL, "--> got '" << rfc1738_escape(buf1) << "'");
 636             ipcSend(cwfd, err_string, strlen(err_string));
 637             goto cleanup;
 638         }
 639
 640         x = write(c2p[1], (const char *) &PS_ipc, sizeof(PS_ipc));
 641
 642         if (x < (ssize_t)sizeof(PS_ipc)) {
 643             debugs(54, DBG_CRITICAL, "ipcCreate: CHILD: write FD " << c2p[1] << ": " << xstrerror());
 644             debugs(54, DBG_CRITICAL, "ipcCreate: CHILD: " << prog << ": socket exchange failed");
 645
 646             ipcSend(cwfd, err_string, strlen(err_string));
 647             goto cleanup;
 648         }
 649
 650         x = read(p2c[0], buf1, 8192);
 651
 652         if (x < 0) {
 653             debugs(54, DBG_CRITICAL, "ipcCreate: CHILD: read FD " << p2c[0] << ": " << xstrerror());
 654             debugs(54, DBG_CRITICAL, "ipcCreate: CHILD: " << prog << ": socket exchange failed");
 655
 656             ipcSend(cwfd, err_string, strlen(err_string));
 657             goto cleanup;
 658         } else if (strncmp(buf1, ok_string, strlen(ok_string))) {
 659             debugs(54, DBG_CRITICAL, "ipcCreate: CHILD: " << prog << ": socket exchange failed");
 660             debugs(54, DBG_CRITICAL, "--> read returned " << x);
 661             buf1[x] = '\0';
 662             debugs(54, DBG_CRITICAL, "--> got '" << rfc1738_escape(buf1) << "'");
 663             ipcSend(cwfd, err_string, strlen(err_string));
 664             goto cleanup;
 665         }
 666
 667         x = send(pwfd_ipc, (const void *)ok_string, strlen(ok_string), 0);
 668         x = recv(prfd_ipc, (void *)(buf1 + 200), 8191 - 200, 0);
 669         assert((size_t) x == strlen(ok_string)
 670                && !strncmp(ok_string, buf1 + 200, strlen(ok_string)));
 671     }                           /* IPC_UDP_SOCKET */
 672
 673     snprintf(buf1, 8191, "%s(%ld) CHILD socket", prog, (long int) pid);
 674
 675     fd_note(fd, buf1);
 676
 677     if (prfd_ipc != -1) {
 678         snprintf(buf1, 8191, "%s(%ld) <-> ipc CHILD socket", prog, (long int) pid);
 679         fd_note(crfd_ipc, buf1);
 680         snprintf(buf1, 8191, "%s(%ld) <-> ipc PARENT socket", prog, (long int) pid);
 681         fd_note(prfd_ipc, buf1);
 682     }
 683
 684     /* else {                       IPC_TCP_SOCKET */
 685     /*     commSetNoLinger(fd); */
 686     /*  } */
 687     thread_params.prog = prog;
 688
 689     thread_params.send_fd = cwfd;
 690
 691     thread_params.pid = pid;
 692
 693     if ((thread_params.type = type) == IPC_TCP_SOCKET)
 694         thread_params.rfd = p2c[0];
 695     else
 696         thread_params.rfd = prfd_ipc;
 697
 698     thread = (HANDLE)_beginthreadex(NULL, 0, ipc_thread_2, &thread_params, 0, NULL);
 699
 700     if (!thread) {
 701         debugs(54, DBG_CRITICAL, "ipcCreate: CHILD: _beginthreadex: " << xstrerror());
 702         ipcSend(cwfd, err_string, strlen(err_string));
 703         goto cleanup;
 704     }
 705
 706     snprintf(buf1, 8191, "%ld\n", (long int) pid);
 707
 708     if (-1 == ipcSend(cwfd, buf1, strlen(buf1)))
 709         goto cleanup;
 710
 711     debugs(54, 2, "ipc(" << prog << "," << pid << "): started successfully");
 712
 713     /* cycle */
 714     for (;;) {
 715         x = recv(crfd, (void *)buf1, 8192, 0);
 716
 717         if (x <= 0) {
 718             debugs(54, 3, "ipc(" << prog << "," << pid << "): " << x << " bytes received from parent. Exiting...");
 719             break;
 720         }
 721
 722         buf1[x] = '\0';
 723
 724         if (type == IPC_UDP_SOCKET && !strcmp(buf1, shutdown_string)) {
 725             debugs(54, 3, "ipc(" << prog << "," << pid << "): request for shutdown received from parent. Exiting...");
 726
 727             TerminateProcess(hProcess, 0);
 728             break;
 729         }
 730
 731         debugs(54, 5, "ipc(" << prog << "," << pid << "): received from parent: " << rfc1738_escape_unescaped(buf1));
 732
 733         if (type == IPC_TCP_SOCKET)
 734             x = write(c2p[1], buf1, x);
 735         else
 736             x = send(pwfd_ipc, (const void *)buf1, x, 0);
 737
 738         if (x <= 0) {
 739             debugs(54, 3, "ipc(" << prog << "," << pid << "): " << x << " bytes written to " << prog << ". Exiting...");
 740
 741             break;
 742         }
 743     }
 744
 745     retval = 0;
 746
 747 cleanup:
 748
 749     if (c2p[1] != -1)
 750         close(c2p[1]);
 751
 752     if (fd_table[crfd].flags.open)
 753         ipcCloseAllFD(-1, -1, crfd, cwfd);
 754
 755     if (prfd_ipc != -1) {
 756         send(crfd_ipc, (const void *)shutdown_string, strlen(shutdown_string), 0);
 757         shutdown(crfd_ipc, SD_BOTH);
 758         shutdown(prfd_ipc, SD_BOTH);
 759     }
 760
 761     ipcCloseAllFD(prfd_ipc, pwfd_ipc, crfd_ipc, cwfd_ipc);
 762
 763     if (hProcess && WAIT_OBJECT_0 !=
 764             WaitForSingleObject(hProcess, type == IPC_UDP_SOCKET ? 12000 : 5000)) {
 765
 766         getCurrentTime();
 767         debugs(54, DBG_CRITICAL, "ipc(" << prog << "," << pid << "): WARNING: " << prog <<
 768                " didn't exit in " << (type == IPC_UDP_SOCKET ? 12 : 5) << " seconds.");
 769
 770     }
 771
 772     if (thread && WAIT_OBJECT_0 != WaitForSingleObject(thread, 3000)) {
 773         getCurrentTime();
 774         debugs(54, DBG_CRITICAL, "ipc(" << prog << "," << pid << "): WARNING: ipc_thread_2 didn't exit in 3 seconds.");
 775
 776     }
 777
 778     getCurrentTime();
 779
 780     if (!retval)
 781         debugs(54, 2, "ipc(" << prog << "," << pid << "): normal exit");
 782
 783     if (buf1)
 784         xfree(buf1);
 785
 786     if (prog)
 787         xfree(prog);
 788
 789     if (thread)
 790         CloseHandle(thread);
 791
 792     if (hProcess)
 793         CloseHandle(hProcess);
 794
 795     if (p2c[0] != -1)
 796         close(p2c[0]);
 797
 798     return retval;
 799 }
 800
 801 static unsigned int __stdcall
 802 ipc_thread_2(void *in_params)
 803 {
 804     int x;
 805
 806     struct thread_params *params = (struct thread_params *) in_params;
 807     int type = params->type;
 808     int rfd = params->rfd;
 809     int send_fd = params->send_fd;
 810     char *prog = xstrdup(params->prog);
 811     pid_t pid = params->pid;
 812     char *buf2 = (char *)xcalloc(1, 8192);
 813
 814     for (;;) {
 815         if (type == IPC_TCP_SOCKET)
 816             x = read(rfd, buf2, 8192);
 817         else
 818             x = recv(rfd, (void *)buf2, 8192, 0);
 819
 820         if ((x <= 0 && type == IPC_TCP_SOCKET) ||
 821                 (x < 0 && type == IPC_UDP_SOCKET)) {
 822             debugs(54, 3, "ipc(" << prog << "," << pid << "): " << x << " bytes read from " << prog << ". Exiting...");
 823
 824             break;
 825         }
 826
 827         buf2[x] = '\0';
 828
 829         if (type == IPC_UDP_SOCKET && !strcmp(buf2, shutdown_string)) {
 830             debugs(54, 3, "ipc(" << prog << "," << pid << "): request for shutdown received. Exiting...");
 831
 832             break;
 833         }
 834
 835         if (x >= 2) {
 836             if ((buf2[x - 1] == '\n') && (buf2[x - 2] == '\r')) {
 837                 buf2[x - 2] = '\n';
 838                 buf2[x - 1] = '\0';
 839                 --x;
 840             }
 841         }
 842
 843         debugs(54, 5, "ipc(" << prog << "," << pid << "): received from child : " << rfc1738_escape_unescaped(buf2));
 844
 845         x = send(send_fd, (const void *)buf2, x, 0);
 846
 847         if ((x <= 0 && type == IPC_TCP_SOCKET) ||
 848                 (x < 0 && type == IPC_UDP_SOCKET)) {
 849             debugs(54, 3, "ipc(" << prog << "," << pid << "): " << x << " bytes sent to parent. Exiting...");
 850
 851             break;
 852         }
 853     }
 854
 855     xfree(prog);
 856     xfree(buf2);
 857     return 0;
 858 }