webcit/tcp_sockets.c

   1 /*
   2  * $Id$
   3  *
   4  * Copyright (c) 1987-2010 by the citadel.org team
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 /*
  22  * Uncomment this to log all communications with the Citadel server
  23 #define SERV_TRACE 1
  24  */
  25
  26
  27 #include "webcit.h"
  28 #include "webserver.h"
  29
  30 extern int DisableGzip;
  31 long MaxRead = -1; /* should we do READ scattered or all at once? */
  32
  33 /*
  34  * register the timeout
  35  */
  36 RETSIGTYPE timeout(int signum)
  37 {
  38         lprintf(1, "Connection timed out; unable to reach citserver\n");
  39         /* no exit here, since we need to server the connection unreachable thing. exit(3); */
  40 }
  41
  42
  43 /*
  44  *  Connect a unix domain socket
  45  *  sockpath where to open a unix domain socket
  46  */
  47 int uds_connectsock(char *sockpath)
  48 {
  49         struct sockaddr_un addr;
  50         int s;
  51
  52         memset(&addr, 0, sizeof(addr));
  53         addr.sun_family = AF_UNIX;
  54         strncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
  55
  56         s = socket(AF_UNIX, SOCK_STREAM, 0);
  57         if (s < 0) {
  58                 lprintf(1, "Can't create socket[%s]: %s\n",
  59                         sockpath,
  60                         strerror(errno));
  61                 return(-1);
  62         }
  63
  64         if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
  65                 lprintf(1, "Can't connect [%s]: %s\n",
  66                         sockpath,
  67                         strerror(errno));
  68                 close(s);
  69                 return(-1);
  70         }
  71
  72         return s;
  73 }
  74
  75
  76 /*
  77  *  Connect a TCP/IP socket
  78  *  host the host to connect to
  79  *  service the service on the host to call
  80  */
  81 int tcp_connectsock(char *host, char *service)
  82 {
  83         int fdflags;
  84         struct hostent *phe;
  85         struct servent *pse;
  86         struct protoent *ppe;
  87         struct sockaddr_in sin;
  88         int s;
  89
  90         memset(&sin, 0, sizeof(sin));
  91         sin.sin_family = AF_INET;
  92
  93         pse = getservbyname(service, "tcp");
  94         if (pse) {
  95                 sin.sin_port = pse->s_port;
  96         } else if ((sin.sin_port = htons((u_short) atoi(service))) == 0) {
  97                 lprintf(1, "Can't get %s service entry\n", service);
  98                 return (-1);
  99         }
 100         phe = gethostbyname(host);
 101         if (phe) {
 102                 memcpy(&sin.sin_addr, phe->h_addr, phe->h_length);
 103         } else if ((sin.sin_addr.s_addr = inet_addr(host)) == INADDR_NONE) {
 104                 lprintf(1, "Can't get %s host entry: %s\n",
 105                         host, strerror(errno));
 106                 return (-1);
 107         }
 108         if ((ppe = getprotobyname("tcp")) == 0) {
 109                 lprintf(1, "Can't get TCP protocol entry: %s\n",
 110                         strerror(errno));
 111                 return (-1);
 112         }
 113
 114         s = socket(PF_INET, SOCK_STREAM, ppe->p_proto);
 115         if (s < 0) {
 116                 lprintf(1, "Can't create socket: %s\n", strerror(errno));
 117                 return (-1);
 118         }
 119
 120         fdflags = fcntl(s, F_GETFL);
 121         if (fdflags < 0)
 122                 lprintf(1, "unable to get socket flags!  %s.%s: %s \n",
 123                         host, service, strerror(errno));
 124         fdflags = fdflags | O_NONBLOCK;
 125         if (fcntl(s, F_SETFD, fdflags) < 0)
 126                 lprintf(1, "unable to set socket nonblocking flags!  %s.%s: %s \n",
 127                         host, service, strerror(errno));
 128
 129         signal(SIGALRM, timeout);
 130         alarm(30);
 131
 132         if (connect(s, (struct sockaddr *) &sin, sizeof(sin)) < 0) {
 133                 lprintf(1, "Can't connect to %s.%s: %s\n",
 134                         host, service, strerror(errno));
 135                 close(s);
 136                 return (-1);
 137         }
 138         alarm(0);
 139         signal(SIGALRM, SIG_IGN);
 140         if (!is_https) {
 141                 fdflags = fcntl(s, F_GETFL);
 142                 if (fdflags < 0)
 143                         lprintf(1, "unable to get socket flags!  %s.%s: %s \n",
 144                                 host, service, strerror(errno));
 145                 fdflags = fdflags | O_NONBLOCK;
 146                 if (fcntl(s, F_SETFD, fdflags) < 0)
 147                         lprintf(1, "unable to set socket nonblocking flags!  %s.%s: %s \n",
 148                                 host, service, strerror(errno));
 149         }
 150         return (s);
 151 }
 152
 153
 154
 155 /*
 156  *  input string from pipe
 157  */
 158 int serv_getln(char *strbuf, int bufsize)
 159 {
 160         wcsession *WCC = WC;
 161         int len;
 162
 163         *strbuf = '\0';
 164         StrBuf_ServGetln(WCC->MigrateReadLineBuf);
 165         len = StrLength(WCC->MigrateReadLineBuf);
 166         if (len > bufsize)
 167                 len = bufsize - 1;
 168         memcpy(strbuf, ChrPtr(WCC->MigrateReadLineBuf), len);
 169         FlushStrBuf(WCC->MigrateReadLineBuf);
 170         strbuf[len] = '\0';
 171 #ifdef SERV_TRACE
 172         lprintf(9, "%3d<<<%s\n", WC->serv_sock, strbuf);
 173 #endif
 174         return len;
 175 }
 176
 177
 178 int StrBuf_ServGetln(StrBuf *buf)
 179 {
 180         wcsession *WCC = WC;
 181         const char *ErrStr = NULL;
 182         int rc;
 183
 184         FlushStrBuf(buf);
 185         rc = StrBufTCP_read_buffered_line_fast(buf,
 186                                                WCC->ReadBuf,
 187                                                &WCC->ReadPos,
 188                                                &WCC->serv_sock,
 189                                                5, 1,
 190                                                &ErrStr);
 191         if (rc < 0)
 192         {
 193                 lprintf(1, "Server connection broken: %s\n",
 194                         (ErrStr)?ErrStr:"");
 195                 wc_backtrace();
 196                 WCC->serv_sock = (-1);
 197                 WCC->connected = 0;
 198                 WCC->logged_in = 0;
 199         }
 200 #ifdef SERV_TRACE
 201         else
 202         {
 203                 long pos=0;
 204                 if (WCC->ReadPos != NULL)
 205                         pos = WCC->ReadPos - ChrPtr(buf);
 206                 lprintf(9, "%3d<<<[%ld]%s\n", WC->serv_sock, pos, ChrPtr(buf));
 207         }
 208 #endif
 209         return rc;
 210 }
 211
 212 int StrBuf_ServGetBLOBBuffered(StrBuf *buf, long BlobSize)
 213 {
 214         wcsession *WCC = WC;
 215         const char *ErrStr;
 216         int rc;
 217
 218         rc = StrBufReadBLOBBuffered(buf,
 219                                     WCC->ReadBuf,
 220                                     &WCC->ReadPos,
 221                                     &WCC->serv_sock,
 222                                     1,
 223                                     BlobSize,
 224                                     NNN_TERM,
 225                                     &ErrStr);
 226         if (rc < 0)
 227         {
 228                 lprintf(1, "Server connection broken: %s\n",
 229                         (ErrStr)?ErrStr:"");
 230                 wc_backtrace();
 231                 WCC->serv_sock = (-1);
 232                 WCC->connected = 0;
 233                 WCC->logged_in = 0;
 234         }
 235 #ifdef SERV_TRACE
 236         else
 237                 lprintf(9, "%3d<<<BLOB: %ld bytes\n", WC->serv_sock, StrLength(buf));
 238 #endif
 239
 240         return rc;
 241 }
 242
 243 int StrBuf_ServGetBLOB(StrBuf *buf, long BlobSize)
 244 {
 245         wcsession *WCC = WC;
 246         const char *ErrStr;
 247         int rc;
 248
 249         WCC->ReadPos = NULL;
 250         rc = StrBufReadBLOB(buf, &WCC->serv_sock, 1, BlobSize, &ErrStr);
 251         if (rc < 0)
 252         {
 253                 lprintf(1, "Server connection broken: %s\n",
 254                         (ErrStr)?ErrStr:"");
 255                 wc_backtrace();
 256                 WCC->serv_sock = (-1);
 257                 WCC->connected = 0;
 258                 WCC->logged_in = 0;
 259         }
 260 #ifdef SERV_TRACE
 261         else
 262                 lprintf(9, "%3d<<<BLOB: %ld bytes\n", WC->serv_sock, StrLength(buf));
 263 #endif
 264
 265         return rc;
 266 }
 267
 268 /*
 269  *  send binary to server
 270  *  buf the buffer to write to citadel server
 271  *  nbytes how many bytes to send to citadel server
 272  */
 273 void serv_write(const char *buf, int nbytes)
 274 {
 275         wcsession *WCC = WC;
 276         int bytes_written = 0;
 277         int retval;
 278
 279         FlushStrBuf(WCC->ReadBuf);
 280         WCC->ReadPos = NULL;
 281         while (bytes_written < nbytes) {
 282                 retval = write(WCC->serv_sock, &buf[bytes_written],
 283                                nbytes - bytes_written);
 284                 if (retval < 1) {
 285                         const char *ErrStr = strerror(errno);
 286                         lprintf(1, "Server connection broken: %s\n",
 287                                 (ErrStr)?ErrStr:"");
 288                         close(WCC->serv_sock);
 289                         WCC->serv_sock = (-1);
 290                         WCC->connected = 0;
 291                         WCC->logged_in = 0;
 292                         return;
 293                 }
 294                 bytes_written = bytes_written + retval;
 295         }
 296 }
 297
 298
 299 /*
 300  *  send line to server
 301  *  string the line to send to the citadel server
 302  */
 303 void serv_puts(const char *string)
 304 {
 305         wcsession *WCC = WC;
 306 #ifdef SERV_TRACE
 307         lprintf(9, "%3d>>>%s\n", WC->serv_sock, string);
 308 #endif
 309         FlushStrBuf(WCC->ReadBuf);
 310         WCC->ReadPos = NULL;
 311
 312         serv_write(string, strlen(string));
 313         serv_write("\n", 1);
 314 }
 315
 316 /*
 317  *  send line to server
 318  *  string the line to send to the citadel server
 319  */
 320 void serv_putbuf(const StrBuf *string)
 321 {
 322         wcsession *WCC = WC;
 323 #ifdef SERV_TRACE
 324         lprintf(9, "%3d>>>%s\n", WC->serv_sock, ChrPtr(string));
 325 #endif
 326         FlushStrBuf(WCC->ReadBuf);
 327         WCC->ReadPos = NULL;
 328
 329         serv_write(ChrPtr(string), StrLength(string));
 330         serv_write("\n", 1);
 331 }
 332
 333
 334 /*
 335  *  convenience function to send stuff to the server
 336  *  format the formatstring
 337  *  ... the entities to insert into format
 338  */
 339 void serv_printf(const char *format,...)
 340 {
 341         wcsession *WCC = WC;
 342         va_list arg_ptr;
 343         char buf[SIZ];
 344         size_t len;
 345
 346         FlushStrBuf(WCC->ReadBuf);
 347         WCC->ReadPos = NULL;
 348
 349         va_start(arg_ptr, format);
 350         vsnprintf(buf, sizeof buf, format, arg_ptr);
 351         va_end(arg_ptr);
 352
 353         len = strlen(buf);
 354         buf[len++] = '\n';
 355         buf[len] = '\0';
 356         serv_write(buf, len);
 357 #ifdef SERV_TRACE
 358         lprintf(9, ">>>%s", buf);
 359 #endif
 360 }
 361
 362
 363
 364 /**
 365  * Read binary data from server into memory using a series of
 366  * server READ commands.
 367  * \return the read content as StrBuf
 368  */
 369 int serv_read_binary(StrBuf *Ret, size_t total_len, StrBuf *Buf)
 370 {
 371         wcsession *WCC = WC;
 372         size_t bytes = 0;
 373         size_t thisblock = 0;
 374
 375         if (Ret == NULL)
 376             return -1;
 377
 378         if (MaxRead == -1)
 379         {
 380                 serv_printf("READ %d|%d", 0, total_len);
 381                 if (StrBuf_ServGetln(Buf) > 0)
 382                 {
 383                         long YetRead;
 384                         const char *ErrStr;
 385                         const char *pch;
 386                         int rc;
 387
 388                         if (GetServerStatus(Buf, NULL) == 6)
 389                         {
 390                             StrBufCutLeft(Buf, 4);
 391                             thisblock = StrTol(Buf);
 392                             if (WCC->serv_sock==-1) {
 393                                     FlushStrBuf(Ret);
 394                                     return -1;
 395                             }
 396
 397                             if (WCC->ReadPos != NULL) {
 398                                     pch = ChrPtr(WCC->ReadBuf);
 399
 400                                     YetRead = WCC->ReadPos - pch;
 401                                     if (YetRead > 0)
 402                                     {
 403                                             long StillThere;
 404
 405                                             StillThere = StrLength(WCC->ReadBuf) -
 406                                                     YetRead;
 407
 408                                             StrBufPlain(Ret,
 409                                                         WCC->ReadPos,
 410                                                         StillThere);
 411                                             total_len -= StillThere;
 412                                     }
 413                                     FlushStrBuf(WCC->ReadBuf);
 414                                     WCC->ReadPos = NULL;
 415                             }
 416                             if (total_len > 0)
 417                             {
 418                                     rc = StrBufReadBLOB(Ret,
 419                                                         &WCC->serv_sock,
 420                                                         1,
 421                                                         total_len,
 422                                                         &ErrStr);
 423                                     if (rc < 0)
 424                                     {
 425                                             lprintf(1, "Server connection broken: %s\n",
 426                                                     (ErrStr)?ErrStr:"");
 427                                             wc_backtrace();
 428                                             WCC->serv_sock = (-1);
 429                                             WCC->connected = 0;
 430                                             WCC->logged_in = 0;
 431                                             return rc;
 432                                     }
 433                                     else
 434                                             return StrLength(Ret);
 435                             }
 436                             else
 437                                     return StrLength(Ret);
 438                         }
 439                 }
 440                 else
 441                         return -1;
 442         }
 443         else while ((WCC->serv_sock!=-1) &&
 444                (bytes < total_len)) {
 445                 thisblock = MaxRead;
 446                 if ((total_len - bytes) < thisblock) {
 447                         thisblock = total_len - bytes;
 448                         if (thisblock == 0) {
 449                                 FlushStrBuf(Ret);
 450                                 return -1;
 451                         }
 452                 }
 453                 serv_printf("READ %d|%d", (int)bytes, (int)thisblock);
 454                 if (StrBuf_ServGetln(Buf) > 0)
 455                 {
 456                         if (GetServerStatus(Buf, NULL) == 6)
 457                         {
 458                             StrBufCutLeft(Buf, 4);
 459                             thisblock = StrTol(Buf);
 460                             if (WCC->serv_sock==-1) {
 461                                     FlushStrBuf(Ret);
 462                                     return -1;
 463                             }
 464                             StrBuf_ServGetBLOBBuffered(Ret, thisblock);
 465                             bytes += thisblock;
 466                     }
 467                     else {
 468                             lprintf(3, "Error: %s\n", ChrPtr(Buf) + 4);
 469                             return -1;
 470                     }
 471                 }
 472         }
 473         return StrLength(Ret);
 474 }
 475
 476
 477 int ClientGetLine(ParsedHttpHdrs *Hdr, StrBuf *Target)
 478 {
 479         const char *Error;
 480 #ifdef HAVE_OPENSSL
 481         const char *pch, *pchs;
 482         int rlen, len, retval = 0;
 483
 484         if (is_https) {
 485                 int ntries = 0;
 486                 if (StrLength(Hdr->ReadBuf) > 0) {
 487                         pchs = ChrPtr(Hdr->ReadBuf);
 488                         pch = strchr(pchs, '\n');
 489                         if (pch != NULL) {
 490                                 rlen = 0;
 491                                 len = pch - pchs;
 492                                 if (len > 0 && (*(pch - 1) == '\r') )
 493                                         rlen ++;
 494                                 StrBufSub(Target, Hdr->ReadBuf, 0, len - rlen);
 495                                 StrBufCutLeft(Hdr->ReadBuf, len + 1);
 496                                 return len - rlen;
 497                         }
 498                 }
 499
 500                 while (retval == 0) {
 501                                 pch = NULL;
 502                                 pchs = ChrPtr(Hdr->ReadBuf);
 503                                 if (*pchs != '\0')
 504                                         pch = strchr(pchs, '\n');
 505                                 if (pch == NULL) {
 506                                         retval = client_read_sslbuffer(Hdr->ReadBuf, SLEEPING);
 507                                         pchs = ChrPtr(Hdr->ReadBuf);
 508                                         pch = strchr(pchs, '\n');
 509                                 }
 510                                 if (retval == 0) {
 511                                         sleeeeeeeeeep(1);
 512                                         ntries ++;
 513                                 }
 514                                 if (ntries > 10)
 515                                         return 0;
 516                 }
 517                 if ((retval > 0) && (pch != NULL)) {
 518                         rlen = 0;
 519                         len = pch - pchs;
 520                         if (len > 0 && (*(pch - 1) == '\r') )
 521                                 rlen ++;
 522                         StrBufSub(Target, Hdr->ReadBuf, 0, len - rlen);
 523                         StrBufCutLeft(Hdr->ReadBuf, len + 1);
 524                         return len - rlen;
 525
 526                 }
 527                 else
 528                         return -1;
 529         }
 530         else
 531 #endif
 532                 return StrBufTCP_read_buffered_line_fast(Target,
 533                                                          Hdr->ReadBuf,
 534                                                          &Hdr->Pos,
 535                                                          &Hdr->http_sock,
 536                                                          5,
 537                                                          1,
 538                                                          &Error);
 539 }
 540
 541 #ifdef CTDL_IPV6
 542
 543 /*
 544  * This is a generic function to set up a master socket for listening on
 545  * a TCP port.  The server shuts down if the bind fails.  (IPv4/IPv6 version)
 546  *
 547  * ip_addr      IP address to bind
 548  * port_number  port number to bind
 549  * queue_len    number of incoming connections to allow in the queue
 550  */
 551 int ig_tcp_server(char *ip_addr, int port_number, int queue_len)
 552 {
 553         struct protoent *p;
 554         struct sockaddr_in6 sin;
 555         int s, i;
 556
 557         memset(&sin, 0, sizeof(sin));
 558         sin.sin6_family = AF_INET6;
 559
 560         if ((ip_addr == NULL) || (IsEmptyStr(ip_addr)) || (!strcmp(ip_addr, "0.0.0.0"))) {
 561                 sin.sin6_addr = in6addr_any;
 562         } else {
 563                 char bind_to[256];
 564                 if ((strchr(ip_addr, '.')) && (!strchr(ip_addr, ':'))) {
 565                         snprintf(bind_to, sizeof bind_to, "::ffff:%s", ip_addr);
 566                 }
 567                 else {
 568                         safestrncpy(bind_to, ip_addr, sizeof bind_to);
 569                 }
 570                 if (inet_pton(AF_INET6, bind_to, &sin.sin6_addr) <= 0) {
 571                         lprintf(1, "Error binding to [%s] : %s\n", ip_addr, strerror(errno));
 572                         return (-WC_EXIT_BIND);
 573                 }
 574         }
 575
 576         if (port_number == 0) {
 577                 lprintf(1, "Cannot start: no port number specified.\n");
 578                 return (-WC_EXIT_BIND);
 579         }
 580         sin.sin6_port = htons((u_short) port_number);
 581
 582         p = getprotobyname("tcp");
 583
 584         s = socket(PF_INET6, SOCK_STREAM, (p->p_proto));
 585         if (s < 0) {
 586                 lprintf(1, "Can't create an IPv6 socket: %s\n", strerror(errno));
 587                 return (-WC_EXIT_BIND);
 588         }
 589         /* Set some socket options that make sense. */
 590         i = 1;
 591         setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
 592
 593         #ifndef __APPLE__
 594         fcntl(s, F_SETFL, O_NONBLOCK); /* maide: this statement is incorrect
 595                                           there should be a preceding F_GETFL
 596                                           and a bitwise OR with the previous
 597                                           fd flags */
 598         #endif
 599
 600         if (bind(s, (struct sockaddr *) &sin, sizeof(sin)) < 0) {
 601                 lprintf(1, "Can't bind: %s\n", strerror(errno));
 602                 return (-WC_EXIT_BIND);
 603         }
 604         if (listen(s, queue_len) < 0) {
 605                 lprintf(1, "Can't listen: %s\n", strerror(errno));
 606                 return (-WC_EXIT_BIND);
 607         }
 608         return (s);
 609 }
 610
 611 #else /* CTDL_IPV6 */
 612
 613 /*
 614  * This is a generic function to set up a master socket for listening on
 615  * a TCP port.  The server shuts down if the bind fails.
 616  *
 617  * ip_addr      IP address to bind
 618  * port_number  port number to bind
 619  * queue_len    number of incoming connections to allow in the queue
 620  */
 621 int ig_tcp_server(char *ip_addr, int port_number, int queue_len)
 622 {
 623         struct protoent *p;
 624         struct sockaddr_in sin;
 625         int s, i;
 626
 627         memset(&sin, 0, sizeof(sin));
 628         sin.sin_family = AF_INET;
 629         if (ip_addr == NULL) {
 630                 sin.sin_addr.s_addr = INADDR_ANY;
 631         } else {
 632                 sin.sin_addr.s_addr = inet_addr(ip_addr);
 633         }
 634
 635         if (sin.sin_addr.s_addr == INADDR_NONE) {
 636                 sin.sin_addr.s_addr = INADDR_ANY;
 637         }
 638
 639         if (port_number == 0) {
 640                 lprintf(1, "Cannot start: no port number specified.\n");
 641                 return (-WC_EXIT_BIND);
 642         }
 643         sin.sin_port = htons((u_short) port_number);
 644
 645         p = getprotobyname("tcp");
 646
 647         s = socket(PF_INET, SOCK_STREAM, (p->p_proto));
 648         if (s < 0) {
 649                 lprintf(1, "Can't create an IPv4 socket: %s\n", strerror(errno));
 650                 return (-WC_EXIT_BIND);
 651         }
 652         /* Set some socket options that make sense. */
 653         i = 1;
 654         setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
 655
 656         if (bind(s, (struct sockaddr *) &sin, sizeof(sin)) < 0) {
 657                 lprintf(1, "Can't bind: %s\n", strerror(errno));
 658                 return (-WC_EXIT_BIND);
 659         }
 660         if (listen(s, queue_len) < 0) {
 661                 lprintf(1, "Can't listen: %s\n", strerror(errno));
 662                 return (-WC_EXIT_BIND);
 663         }
 664         return (s);
 665 }
 666
 667 #endif /* CTDL_IPV6 */
 668
 669
 670 /*
 671  * Create a Unix domain socket and listen on it
 672  * sockpath - file name of the unix domain socket
 673  * queue_len - Number of incoming connections to allow in the queue
 674  */
 675 int ig_uds_server(char *sockpath, int queue_len)
 676 {
 677         struct sockaddr_un addr;
 678         int s;
 679         int i;
 680         int actual_queue_len;
 681
 682         actual_queue_len = queue_len;
 683         if (actual_queue_len < 5) actual_queue_len = 5;
 684
 685         i = unlink(sockpath);
 686         if ((i != 0) && (errno != ENOENT)) {
 687                 lprintf(1, "webcit: can't unlink %s: %s\n",
 688                         sockpath, strerror(errno));
 689                 return (-WC_EXIT_BIND);
 690         }
 691
 692         memset(&addr, 0, sizeof(addr));
 693         addr.sun_family = AF_UNIX;
 694         safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
 695
 696         s = socket(AF_UNIX, SOCK_STREAM, 0);
 697         if (s < 0) {
 698                 lprintf(1, "webcit: Can't create a unix domain socket: %s\n", strerror(errno));
 699                 return (-WC_EXIT_BIND);
 700         }
 701
 702         if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 703                 lprintf(1, "webcit: Can't bind: %s\n",
 704                         strerror(errno));
 705                 return (-WC_EXIT_BIND);
 706         }
 707
 708         if (listen(s, actual_queue_len) < 0) {
 709                 lprintf(1, "webcit: Can't listen: %s\n",
 710                         strerror(errno));
 711                 return (-WC_EXIT_BIND);
 712         }
 713
 714         chmod(sockpath, 0777);
 715         return(s);
 716 }
 717
 718
 719
 720
 721 /*
 722  * Read data from the client socket.
 723  *
 724  * sock         socket fd to read from
 725  * buf          buffer to read into
 726  * bytes        number of bytes to read
 727  * timeout      Number of seconds to wait before timing out
 728  *
 729  * Possible return values:
 730  *      1       Requested number of bytes has been read.
 731  *      0       Request timed out.
 732  *      -1      Connection is broken, or other error.
 733  */
 734 int client_read_to(ParsedHttpHdrs *Hdr, StrBuf *Target, int bytes, int timeout)
 735 {
 736         const char *Error;
 737         int retval = 0;
 738
 739 #ifdef HAVE_OPENSSL
 740         if (is_https) {
 741                 long bufremain;
 742                 long baselen;
 743
 744                 baselen = StrLength(Target);
 745
 746                 if (Hdr->Pos == NULL)
 747                         Hdr->Pos = ChrPtr(Hdr->ReadBuf);
 748                 bufremain = StrLength(Hdr->ReadBuf) - (Hdr->Pos - ChrPtr(Hdr->ReadBuf));
 749
 750                 if (bytes < bufremain)
 751                         bufremain = bytes;
 752                 StrBufAppendBufPlain(Target, Hdr->Pos, bufremain, 0);
 753                 StrBufCutLeft(Hdr->ReadBuf, bufremain);
 754
 755                 if (bytes > bufremain)
 756                 {
 757                         while ((StrLength(Hdr->ReadBuf) + StrLength(Target) < bytes + baselen) &&
 758                                (retval >= 0))
 759                                 retval = client_read_sslbuffer(Hdr->ReadBuf, timeout);
 760                         if (retval >= 0) {
 761                                 StrBufAppendBuf(Target, Hdr->ReadBuf, 0); /* todo: Buf > bytes? */
 762 #ifdef HTTP_TRACING
 763                                 write(2, "\033[32m", 5);
 764                                 write(2, buf, bytes);
 765                                 write(2, "\033[30m", 5);
 766 #endif
 767                                 return 1;
 768                         }
 769                         else {
 770                                 lprintf(2, "client_read_ssl() failed\n");
 771                                 return -1;
 772                         }
 773                 }
 774                 else
 775                         return 1;
 776         }
 777 #endif
 778
 779         retval = StrBufReadBLOBBuffered(Target,
 780                                         Hdr->ReadBuf,
 781                                         &Hdr->Pos,
 782                                         &Hdr->http_sock,
 783                                         1,
 784                                         bytes,
 785                                         O_TERM,
 786                                         &Error);
 787         if (retval < 0) {
 788                 lprintf(2, "client_read() failed: %s\n",
 789                         Error);
 790                 wc_backtrace();
 791                 return retval;
 792         }
 793
 794 #ifdef HTTP_TRACING
 795         write(2, "\033[32m", 5);
 796         write(2, buf, bytes);
 797         write(2, "\033[30m", 5);
 798 #endif
 799         return 1;
 800 }
 801
 802
 803 /*
 804  * Begin buffering HTTP output so we can transmit it all in one write operation later.
 805  */
 806 void begin_burst(void)
 807 {
 808         if (WC->WBuf == NULL) {
 809                 WC->WBuf = NewStrBufPlain(NULL, 32768);
 810         }
 811 }
 812
 813
 814 /*
 815  * Finish buffering HTTP output.  [Compress using zlib and] output with a Content-Length: header.
 816  */
 817 long end_burst(void)
 818 {
 819         wcsession *WCC = WC;
 820         const char *ptr, *eptr;
 821         long count;
 822         ssize_t res = 0;
 823         fd_set wset;
 824         int fdflags;
 825
 826         if (!DisableGzip && (WCC->Hdr->HR.gzip_ok))
 827         {
 828                 if (CompressBuffer(WCC->WBuf) > 0)
 829                         hprintf("Content-encoding: gzip\r\n");
 830                 else {
 831                         lprintf(CTDL_ALERT, "Compression failed: %d [%s] sending uncompressed\n", errno, strerror(errno));
 832                         wc_backtrace();
 833                 }
 834         }
 835
 836         if (WCC->WFBuf != NULL) {
 837                 WildFireSerializePayload(WCC->WFBuf, WCC->HBuf, &WCC->Hdr->nWildfireHeaders, NULL);
 838                 FreeStrBuf(&WCC->WFBuf);
 839         }
 840
 841         if (WCC->Hdr->HR.prohibit_caching)
 842                 hprintf("Pragma: no-cache\r\nCache-Control: no-store\r\nExpires:-1\r\n");
 843         hprintf("Content-length: %d\r\n\r\n", StrLength(WCC->WBuf));
 844
 845         ptr = ChrPtr(WCC->HBuf);
 846         count = StrLength(WCC->HBuf);
 847         eptr = ptr + count;
 848
 849 #ifdef HAVE_OPENSSL
 850         if (is_https) {
 851                 client_write_ssl(WCC->HBuf);
 852                 client_write_ssl(WCC->WBuf);
 853                 return (count);
 854         }
 855 #endif
 856
 857
 858 #ifdef HTTP_TRACING
 859
 860         write(2, "\033[34m", 5);
 861         write(2, ptr, StrLength(WCC->WBuf));
 862         write(2, "\033[30m", 5);
 863 #endif
 864         if (WCC->Hdr->http_sock == -1)
 865                 return -1;
 866         fdflags = fcntl(WC->Hdr->http_sock, F_GETFL);
 867
 868         while ((ptr < eptr) && (WCC->Hdr->http_sock != -1)){
 869                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 870                         FD_ZERO(&wset);
 871                         FD_SET(WCC->Hdr->http_sock, &wset);
 872                         if (select(WCC->Hdr->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 873                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 874                                 return -1;
 875                         }
 876                 }
 877
 878                 if ((WCC->Hdr->http_sock == -1) ||
 879                     (res = write(WCC->Hdr->http_sock,
 880                                  ptr,
 881                                  count)) == -1) {
 882                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 883                         wc_backtrace();
 884                         return res;
 885                 }
 886                 count -= res;
 887                 ptr += res;
 888         }
 889
 890         ptr = ChrPtr(WCC->WBuf);
 891         count = StrLength(WCC->WBuf);
 892         eptr = ptr + count;
 893
 894 #ifdef HTTP_TRACING
 895
 896         write(2, "\033[34m", 5);
 897         write(2, ptr, StrLength(WCC->WBuf));
 898         write(2, "\033[30m", 5);
 899 #endif
 900
 901         while ((ptr < eptr) && (WCC->Hdr->http_sock != -1)) {
 902                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 903                         FD_ZERO(&wset);
 904                         FD_SET(WCC->Hdr->http_sock, &wset);
 905                         if (select(WCC->Hdr->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 906                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 907                                 return -1;
 908                         }
 909                 }
 910
 911                 if ((WCC->Hdr->http_sock == -1) ||
 912                     (res = write(WCC->Hdr->http_sock,
 913                                  ptr,
 914                                  count)) == -1) {
 915                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 916                         wc_backtrace();
 917                         return res;
 918                 }
 919                 count -= res;
 920                 ptr += res;
 921         }
 922
 923         return StrLength(WCC->WBuf);
 924 }
 925
 926
 927 /*
 928  * lingering_close() a`la Apache. see
 929  * http://www.apache.org/docs/misc/fin_wait_2.html for rationale
 930  */
 931 int lingering_close(int fd)
 932 {
 933         char buf[SIZ];
 934         int i;
 935         fd_set set;
 936         struct timeval tv, start;
 937
 938         gettimeofday(&start, NULL);
 939         if (fd == -1)
 940                 return -1;
 941         shutdown(fd, 1);
 942         do {
 943                 do {
 944                         gettimeofday(&tv, NULL);
 945                         tv.tv_sec = SLEEPING - (tv.tv_sec - start.tv_sec);
 946                         tv.tv_usec = start.tv_usec - tv.tv_usec;
 947                         if (tv.tv_usec < 0) {
 948                                 tv.tv_sec--;
 949                                 tv.tv_usec += 1000000;
 950                         }
 951                         FD_ZERO(&set);
 952                         FD_SET(fd, &set);
 953                         i = select(fd + 1, &set, NULL, NULL, &tv);
 954                 } while (i == -1 && errno == EINTR);
 955
 956                 if (i <= 0)
 957                         break;
 958
 959                 i = read(fd, buf, sizeof buf);
 960         } while (i != 0 && (i != -1 || errno == EINTR));
 961
 962         return close(fd);
 963 }
 964
 965 void
 966 HttpNewModule_TCPSOCKETS
 967 (ParsedHttpHdrs *httpreq)
 968 {
 969
 970         httpreq->ReadBuf = NewStrBufPlain(NULL, SIZ * 4);
 971 }
 972
 973 void
 974 HttpDetachModule_TCPSOCKETS
 975 (ParsedHttpHdrs *httpreq)
 976 {
 977
 978         FlushStrBuf(httpreq->ReadBuf);
 979         ReAdjustEmptyBuf(httpreq->ReadBuf, 4 * SIZ, SIZ);
 980 }
 981
 982 void
 983 HttpDestroyModule_TCPSOCKETS
 984 (ParsedHttpHdrs *httpreq)
 985 {
 986
 987         FreeStrBuf(&httpreq->ReadBuf);
 988 }
 989
 990
 991 void
 992 SessionNewModule_TCPSOCKETS
 993 (wcsession *sess)
 994 {
 995         sess->CLineBuf = NewStrBuf();
 996         sess->MigrateReadLineBuf = NewStrBuf();
 997 }
 998
 999 void
1000 SessionDestroyModule_TCPSOCKETS
1001 (wcsession *sess)
1002 {
1003         FreeStrBuf(&sess->CLineBuf);
1004         FreeStrBuf(&sess->ReadBuf);
1005         sess->ReadPos = NULL;
1006         FreeStrBuf(&sess->MigrateReadLineBuf);
1007         if (sess->serv_sock > 0)
1008                 close(sess->serv_sock);
1009 }