webcit/tcp_sockets.c

   1 /*
   2  * Copyright (c) 1987-2011 by the citadel.org team
   3  *
   4  * This program is open source software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 /*
  20  * Uncomment this to log all communications with the Citadel server
  21 #define SERV_TRACE 1
  22  */
  23
  24
  25 #include "webcit.h"
  26 #include "webserver.h"
  27
  28 extern int DisableGzip;
  29 long MaxRead = -1; /* should we do READ scattered or all at once? */
  30
  31 /*
  32  * register the timeout
  33  */
  34 RETSIGTYPE timeout(int signum)
  35 {
  36         syslog(1, "Connection timed out; unable to reach citserver\n");
  37         /* no exit here, since we need to server the connection unreachable thing. exit(3); */
  38 }
  39
  40
  41 /*
  42  * Client side - connect to a unix domain socket
  43  */
  44 int uds_connectsock(char *sockpath)
  45 {
  46         struct sockaddr_un addr;
  47         int s;
  48
  49         memset(&addr, 0, sizeof(addr));
  50         addr.sun_family = AF_UNIX;
  51         strncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
  52
  53         s = socket(AF_UNIX, SOCK_STREAM, 0);
  54         if (s < 0) {
  55                 syslog(1, "Can't create socket[%s]: %s\n", sockpath, strerror(errno));
  56                 return(-1);
  57         }
  58
  59         if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
  60                 syslog(1, "Can't connect [%s]: %s\n", sockpath, strerror(errno));
  61                 close(s);
  62                 return(-1);
  63         }
  64
  65         return s;
  66 }
  67
  68
  69 /*
  70  * TCP client - connect to a host/port
  71  */
  72 int tcp_connectsock(char *host, char *service)
  73 {
  74         struct in6_addr serveraddr;
  75         struct addrinfo hints;
  76         struct addrinfo *res = NULL;
  77         struct addrinfo *ai = NULL;
  78         int rc = (-1);
  79         int s = (-1);
  80
  81         if ((host == NULL) || IsEmptyStr(host))
  82                 return (-1);
  83         if ((service == NULL) || IsEmptyStr(service))
  84                 return (-1);
  85
  86         syslog(9, "tcp_connectsock(%s,%s)\n", host, service);
  87
  88         memset(&hints, 0x00, sizeof(hints));
  89         hints.ai_flags = AI_NUMERICSERV;
  90         hints.ai_family = AF_UNSPEC;
  91         hints.ai_socktype = SOCK_STREAM;
  92
  93         /*
  94          * Handle numeric IPv4 and IPv6 addresses
  95          */
  96         rc = inet_pton(AF_INET, host, &serveraddr);
  97         if (rc == 1) {                                          /* dotted quad */
  98                 hints.ai_family = AF_INET;
  99                 hints.ai_flags |= AI_NUMERICHOST;
 100         } else {
 101                 rc = inet_pton(AF_INET6, host, &serveraddr);
 102                 if (rc == 1) {                                  /* IPv6 address */
 103                         hints.ai_family = AF_INET6;
 104                         hints.ai_flags |= AI_NUMERICHOST;
 105                 }
 106         }
 107
 108         /* Begin the connection process */
 109
 110         rc = getaddrinfo(host, service, &hints, &res);
 111         if (rc != 0) {
 112                 syslog(1, "%s: %s\n", host, gai_strerror(rc));
 113                 freeaddrinfo(res);
 114                 return(-1);
 115         }
 116
 117         /*
 118          * Try all available addresses until we connect to one or until we run out.
 119          */
 120         for (ai = res; ai != NULL; ai = ai->ai_next) {
 121
 122                 if (ai->ai_family == AF_INET) syslog(9, "Trying IPv4\n");
 123                 else if (ai->ai_family == AF_INET6) syslog(9, "Trying IPv6\n");
 124                 else syslog(9, "This is going to fail.\n");
 125
 126                 s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
 127                 if (s < 0) {
 128                         syslog(1, "socket() failed: %s\n", strerror(errno));
 129                         freeaddrinfo(res);
 130                         return(-1);
 131                 }
 132                 rc = connect(s, ai->ai_addr, ai->ai_addrlen);
 133                 if (rc >= 0) {
 134                         freeaddrinfo(res);
 135                         return(s);
 136                 }
 137                 else {
 138                         syslog(1, "connect() failed: %s\n", strerror(errno));
 139                         close(s);
 140                 }
 141         }
 142         freeaddrinfo(res);
 143         return(-1);
 144 }
 145
 146
 147 /*
 148  *  input string from pipe
 149  */
 150 int serv_getln(char *strbuf, int bufsize)
 151 {
 152         wcsession *WCC = WC;
 153         int len;
 154
 155         *strbuf = '\0';
 156         StrBuf_ServGetln(WCC->MigrateReadLineBuf);
 157         len = StrLength(WCC->MigrateReadLineBuf);
 158         if (len > bufsize)
 159                 len = bufsize - 1;
 160         memcpy(strbuf, ChrPtr(WCC->MigrateReadLineBuf), len);
 161         FlushStrBuf(WCC->MigrateReadLineBuf);
 162         strbuf[len] = '\0';
 163 #ifdef SERV_TRACE
 164         syslog(9, "%3d<<<%s\n", WC->serv_sock, strbuf);
 165 #endif
 166         return len;
 167 }
 168
 169
 170 int StrBuf_ServGetln(StrBuf *buf)
 171 {
 172         wcsession *WCC = WC;
 173         const char *ErrStr = NULL;
 174         int rc;
 175
 176         FlushStrBuf(buf);
 177         rc = StrBufTCP_read_buffered_line_fast(buf,
 178                                                WCC->ReadBuf,
 179                                                &WCC->ReadPos,
 180                                                &WCC->serv_sock,
 181                                                5, 1,
 182                                                &ErrStr);
 183         if (rc < 0)
 184         {
 185                 syslog(1, "StrBuf_ServGetln(): Server connection broken: %s\n",
 186                         (ErrStr)?ErrStr:"");
 187                 wc_backtrace();
 188                 WCC->serv_sock = (-1);
 189                 WCC->connected = 0;
 190                 WCC->logged_in = 0;
 191         }
 192 #ifdef SERV_TRACE
 193         else
 194         {
 195                 long pos = 0;
 196                 if (WCC->ReadPos != NULL)
 197                         pos = WCC->ReadPos - ChrPtr(WCC->ReadBuf);
 198                 syslog(9, "%3d<<<[%ld]%s\n", WC->serv_sock, pos, ChrPtr(buf));
 199         }
 200 #endif
 201         return rc;
 202 }
 203
 204 int StrBuf_ServGetBLOBBuffered(StrBuf *buf, long BlobSize)
 205 {
 206         wcsession *WCC = WC;
 207         const char *ErrStr;
 208         int rc;
 209
 210         rc = StrBufReadBLOBBuffered(buf,
 211                                     WCC->ReadBuf,
 212                                     &WCC->ReadPos,
 213                                     &WCC->serv_sock,
 214                                     1,
 215                                     BlobSize,
 216                                     NNN_TERM,
 217                                     &ErrStr);
 218         if (rc < 0)
 219         {
 220                 syslog(1, "StrBuf_ServGetBLOBBuffered(): Server connection broken: %s\n",
 221                         (ErrStr)?ErrStr:"");
 222                 wc_backtrace();
 223                 WCC->serv_sock = (-1);
 224                 WCC->connected = 0;
 225                 WCC->logged_in = 0;
 226         }
 227 #ifdef SERV_TRACE
 228         else
 229                 syslog(9, "%3d<<<BLOB: %d bytes\n", WC->serv_sock, StrLength(buf));
 230 #endif
 231
 232         return rc;
 233 }
 234
 235 int StrBuf_ServGetBLOB(StrBuf *buf, long BlobSize)
 236 {
 237         wcsession *WCC = WC;
 238         const char *ErrStr;
 239         int rc;
 240
 241         WCC->ReadPos = NULL;
 242         rc = StrBufReadBLOB(buf, &WCC->serv_sock, 1, BlobSize, &ErrStr);
 243         if (rc < 0)
 244         {
 245                 syslog(1, "StrBuf_ServGetBLOB(): Server connection broken: %s\n",
 246                         (ErrStr)?ErrStr:"");
 247                 wc_backtrace();
 248                 WCC->serv_sock = (-1);
 249                 WCC->connected = 0;
 250                 WCC->logged_in = 0;
 251         }
 252 #ifdef SERV_TRACE
 253         else
 254                 syslog(9, "%3d<<<BLOB: %d bytes\n", WC->serv_sock, StrLength(buf));
 255 #endif
 256
 257         return rc;
 258 }
 259
 260
 261 void FlushReadBuf (void)
 262 {
 263         long len;
 264         const char *pch;
 265         const char *pche;
 266         wcsession *WCC = WC;
 267
 268         len = StrLength(WCC->ReadBuf);
 269         if ((len > 0) &&
 270             (WCC->ReadPos != NULL) &&
 271             (WCC->ReadPos != StrBufNOTNULL))
 272
 273         {
 274                 pch = ChrPtr(WCC->ReadBuf);
 275                 pche = pch + len;
 276                 if (WCC->ReadPos != pche)
 277                 {
 278                         syslog(1, "ERROR: somebody didn't eat his soup! Remaing Chars: %ld [%s]\n",
 279                                 pche - WCC->ReadPos, pche);
 280                         syslog(1,
 281                                 "--------------------------------------------------------------------------------\n"
 282                                 "Whole buf: [%s]\n"
 283                                 "--------------------------------------------------------------------------------\n",
 284                                 pch);
 285                         AppendImportantMessage(HKEY("Suppenkasper alert! watch your webcit logfile and get connected to your favourite opensource Crew."));
 286                 }
 287         }
 288
 289         FlushStrBuf(WCC->ReadBuf);
 290         WCC->ReadPos = NULL;
 291
 292
 293 }
 294
 295
 296 /*
 297  *  send binary to server
 298  *  buf the buffer to write to citadel server
 299  *  nbytes how many bytes to send to citadel server
 300  */
 301 int serv_write(const char *buf, int nbytes)
 302 {
 303         wcsession *WCC = WC;
 304         int bytes_written = 0;
 305         int retval;
 306
 307         FlushReadBuf();
 308         while (bytes_written < nbytes) {
 309                 retval = write(WCC->serv_sock, &buf[bytes_written],
 310                                nbytes - bytes_written);
 311                 if (retval < 1) {
 312                         const char *ErrStr = strerror(errno);
 313                         syslog(1, "serv_write(): Server connection broken: %s\n",
 314                                 (ErrStr)?ErrStr:"");
 315                         close(WCC->serv_sock);
 316                         WCC->serv_sock = (-1);
 317                         WCC->connected = 0;
 318                         WCC->logged_in = 0;
 319                         return 0;
 320                 }
 321                 bytes_written = bytes_written + retval;
 322         }
 323         return 1;
 324 }
 325
 326
 327 /*
 328  *  send line to server
 329  *  string the line to send to the citadel server
 330  */
 331 int serv_puts(const char *string)
 332 {
 333 #ifdef SERV_TRACE
 334         syslog(9, "%3d>>>%s\n", WC->serv_sock, string);
 335 #endif
 336         FlushReadBuf();
 337
 338         if (!serv_write(string, strlen(string)))
 339                 return 0;
 340         return serv_write("\n", 1);
 341 }
 342
 343 /*
 344  *  send line to server
 345  *  string the line to send to the citadel server
 346  */
 347 int serv_putbuf(const StrBuf *string)
 348 {
 349 #ifdef SERV_TRACE
 350         syslog(9, "%3d>>>%s\n", WC->serv_sock, ChrPtr(string));
 351 #endif
 352         FlushReadBuf();
 353
 354         if (!serv_write(ChrPtr(string), StrLength(string)))
 355                 return 0;
 356         return serv_write("\n", 1);
 357 }
 358
 359
 360 /*
 361  *  convenience function to send stuff to the server
 362  *  format the formatstring
 363  *  ... the entities to insert into format
 364  */
 365 int serv_printf(const char *format,...)
 366 {
 367         va_list arg_ptr;
 368         char buf[SIZ];
 369         size_t len;
 370         int rc;
 371
 372         FlushReadBuf();
 373
 374         va_start(arg_ptr, format);
 375         vsnprintf(buf, sizeof buf, format, arg_ptr);
 376         va_end(arg_ptr);
 377
 378         len = strlen(buf);
 379         buf[len++] = '\n';
 380         buf[len] = '\0';
 381         rc = serv_write(buf, len);
 382 #ifdef SERV_TRACE
 383         syslog(9, ">>>%s", buf);
 384 #endif
 385         return rc;
 386 }
 387
 388
 389 /*
 390  * Read binary data from server into memory using a series of server READ commands.
 391  * returns the read content as StrBuf
 392  */
 393 int serv_read_binary(StrBuf *Ret, size_t total_len, StrBuf *Buf)
 394 {
 395         wcsession *WCC = WC;
 396         size_t bytes_read = 0;
 397         size_t this_block = 0;
 398         int rc;
 399
 400         if (Ret == NULL) {
 401                 return -1;
 402         }
 403
 404         while (bytes_read < total_len) {
 405
 406                 if (WCC->serv_sock==-1) {
 407                         FlushStrBuf(Ret);
 408                         return -1;
 409                 }
 410
 411                 serv_printf("READ "SIZE_T_FMT"|"SIZE_T_FMT, bytes_read, total_len-bytes_read);
 412                 if ( (rc = StrBuf_ServGetln(Buf) > 0) && (GetServerStatus(Buf, NULL) == 6) )
 413                 {
 414                         if (rc < 0)
 415                                 return rc;
 416                         StrBufCutLeft(Buf, 4);
 417                         this_block = StrTol(Buf);
 418                         rc = StrBuf_ServGetBLOBBuffered(Ret, this_block);
 419                         if (rc < 0) {
 420                                 syslog(1, "Server connection broken during download\n");
 421                                 wc_backtrace();
 422                                 WCC->serv_sock = (-1);
 423                                 WCC->connected = 0;
 424                                 WCC->logged_in = 0;
 425                                 return rc;
 426                         }
 427                         bytes_read += rc;
 428                 }
 429         }
 430
 431         return StrLength(Ret);
 432 }
 433
 434
 435 int ClientGetLine(ParsedHttpHdrs *Hdr, StrBuf *Target)
 436 {
 437         const char *Error;
 438 #ifdef HAVE_OPENSSL
 439         const char *pch, *pchs;
 440         int rlen, len, retval = 0;
 441
 442         if (is_https) {
 443                 int ntries = 0;
 444                 if (StrLength(Hdr->ReadBuf) > 0) {
 445                         pchs = ChrPtr(Hdr->ReadBuf);
 446                         pch = strchr(pchs, '\n');
 447                         if (pch != NULL) {
 448                                 rlen = 0;
 449                                 len = pch - pchs;
 450                                 if (len > 0 && (*(pch - 1) == '\r') )
 451                                         rlen ++;
 452                                 StrBufSub(Target, Hdr->ReadBuf, 0, len - rlen);
 453                                 StrBufCutLeft(Hdr->ReadBuf, len + 1);
 454                                 return len - rlen;
 455                         }
 456                 }
 457
 458                 while (retval == 0) {
 459                                 pch = NULL;
 460                                 pchs = ChrPtr(Hdr->ReadBuf);
 461                                 if (*pchs != '\0')
 462                                         pch = strchr(pchs, '\n');
 463                                 if (pch == NULL) {
 464                                         retval = client_read_sslbuffer(Hdr->ReadBuf, SLEEPING);
 465                                         pchs = ChrPtr(Hdr->ReadBuf);
 466                                         pch = strchr(pchs, '\n');
 467                                 }
 468                                 if (retval == 0) {
 469                                         sleeeeeeeeeep(1);
 470                                         ntries ++;
 471                                 }
 472                                 if (ntries > 10)
 473                                         return 0;
 474                 }
 475                 if ((retval > 0) && (pch != NULL)) {
 476                         rlen = 0;
 477                         len = pch - pchs;
 478                         if (len > 0 && (*(pch - 1) == '\r') )
 479                                 rlen ++;
 480                         StrBufSub(Target, Hdr->ReadBuf, 0, len - rlen);
 481                         StrBufCutLeft(Hdr->ReadBuf, len + 1);
 482                         return len - rlen;
 483
 484                 }
 485                 else
 486                         return -1;
 487         }
 488         else
 489 #endif
 490                 return StrBufTCP_read_buffered_line_fast(Target,
 491                                                          Hdr->ReadBuf,
 492                                                          &Hdr->Pos,
 493                                                          &Hdr->http_sock,
 494                                                          5,
 495                                                          1,
 496                                                          &Error);
 497 }
 498
 499
 500 /*
 501  * This is a generic function to set up a master socket for listening on
 502  * a TCP port.  The server shuts down if the bind fails.  (IPv4/IPv6 version)
 503  *
 504  * ip_addr      IP address to bind
 505  * port_number  port number to bind
 506  * queue_len    number of incoming connections to allow in the queue
 507  */
 508 int webcit_tcp_server(char *ip_addr, int port_number, int queue_len)
 509 {
 510         struct protoent *p;
 511         struct sockaddr_in6 sin6;
 512         struct sockaddr_in sin4;
 513         int s, i, b;
 514         int ip_version = 6;
 515
 516         memset(&sin6, 0, sizeof(sin6));
 517         memset(&sin4, 0, sizeof(sin4));
 518         sin6.sin6_family = AF_INET6;
 519         sin4.sin_family = AF_INET;
 520
 521         if (    (ip_addr == NULL)                                                       /* any IPv6 */
 522                 || (IsEmptyStr(ip_addr))
 523                 || (!strcmp(ip_addr, "*"))
 524         ) {
 525                 ip_version = 6;
 526                 sin6.sin6_addr = in6addr_any;
 527         }
 528         else if (!strcmp(ip_addr, "0.0.0.0"))                                           /* any IPv4 */
 529         {
 530                 ip_version = 4;
 531                 sin4.sin_addr.s_addr = INADDR_ANY;
 532         }
 533         else if ((strchr(ip_addr, '.')) && (!strchr(ip_addr, ':')))                     /* specific IPv4 */
 534         {
 535                 ip_version = 4;
 536                 if (inet_pton(AF_INET, ip_addr, &sin4.sin_addr) <= 0) {
 537                         syslog(1, "Error binding to [%s] : %s\n", ip_addr, strerror(errno));
 538                         return (-WC_EXIT_BIND);
 539                 }
 540         }
 541         else                                                                            /* specific IPv6 */
 542         {
 543                 ip_version = 6;
 544                 if (inet_pton(AF_INET6, ip_addr, &sin6.sin6_addr) <= 0) {
 545                         syslog(1, "Error binding to [%s] : %s\n", ip_addr, strerror(errno));
 546                         return (-WC_EXIT_BIND);
 547                 }
 548         }
 549
 550         if (port_number == 0) {
 551                 syslog(1, "Cannot start: no port number specified.\n");
 552                 return (-WC_EXIT_BIND);
 553         }
 554         sin6.sin6_port = htons((u_short) port_number);
 555         sin4.sin_port = htons((u_short) port_number);
 556
 557         p = getprotobyname("tcp");
 558
 559         s = socket( ((ip_version == 6) ? PF_INET6 : PF_INET), SOCK_STREAM, (p->p_proto));
 560         if (s < 0) {
 561                 syslog(1, "Can't create a listening socket: %s\n", strerror(errno));
 562                 return (-WC_EXIT_BIND);
 563         }
 564         /* Set some socket options that make sense. */
 565         i = 1;
 566         setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
 567
 568         if (ip_version == 6) {
 569                 b = bind(s, (struct sockaddr *) &sin6, sizeof(sin6));
 570         }
 571         else {
 572                 b = bind(s, (struct sockaddr *) &sin4, sizeof(sin4));
 573         }
 574
 575         if (b < 0) {
 576                 syslog(1, "Can't bind: %s\n", strerror(errno));
 577                 return (-WC_EXIT_BIND);
 578         }
 579
 580         if (listen(s, queue_len) < 0) {
 581                 syslog(1, "Can't listen: %s\n", strerror(errno));
 582                 return (-WC_EXIT_BIND);
 583         }
 584         return (s);
 585 }
 586
 587
 588 /*
 589  * Create a Unix domain socket and listen on it
 590  * sockpath - file name of the unix domain socket
 591  * queue_len - Number of incoming connections to allow in the queue
 592  */
 593 int webcit_uds_server(char *sockpath, int queue_len)
 594 {
 595         struct sockaddr_un addr;
 596         int s;
 597         int i;
 598         int actual_queue_len;
 599
 600         actual_queue_len = queue_len;
 601         if (actual_queue_len < 5) actual_queue_len = 5;
 602
 603         i = unlink(sockpath);
 604         if ((i != 0) && (errno != ENOENT)) {
 605                 syslog(1, "webcit: can't unlink %s: %s\n",
 606                         sockpath, strerror(errno));
 607                 return (-WC_EXIT_BIND);
 608         }
 609
 610         memset(&addr, 0, sizeof(addr));
 611         addr.sun_family = AF_UNIX;
 612         safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
 613
 614         s = socket(AF_UNIX, SOCK_STREAM, 0);
 615         if (s < 0) {
 616                 syslog(1, "webcit: Can't create a unix domain socket: %s\n", strerror(errno));
 617                 return (-WC_EXIT_BIND);
 618         }
 619
 620         if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 621                 syslog(1, "webcit: Can't bind: %s\n",
 622                         strerror(errno));
 623                 return (-WC_EXIT_BIND);
 624         }
 625
 626         if (listen(s, actual_queue_len) < 0) {
 627                 syslog(1, "webcit: Can't listen: %s\n",
 628                         strerror(errno));
 629                 return (-WC_EXIT_BIND);
 630         }
 631
 632         chmod(sockpath, 0777);
 633         return(s);
 634 }
 635
 636
 637
 638
 639 /*
 640  * Read data from the client socket.
 641  *
 642  * sock         socket fd to read from
 643  * buf          buffer to read into
 644  * bytes        number of bytes to read
 645  * timeout      Number of seconds to wait before timing out
 646  *
 647  * Possible return values:
 648  *      1       Requested number of bytes has been read.
 649  *      0       Request timed out.
 650  *      -1      Connection is broken, or other error.
 651  */
 652 int client_read_to(ParsedHttpHdrs *Hdr, StrBuf *Target, int bytes, int timeout)
 653 {
 654         const char *Error;
 655         int retval = 0;
 656
 657 #ifdef HAVE_OPENSSL
 658         if (is_https) {
 659                 long bufremain = 0;
 660                 long baselen;
 661
 662                 baselen = StrLength(Target);
 663
 664                 if (Hdr->Pos == NULL)
 665                         Hdr->Pos = ChrPtr(Hdr->ReadBuf);
 666
 667                 if (StrLength(Hdr->ReadBuf) > 0)
 668                 {
 669                         bufremain = StrLength(Hdr->ReadBuf) - (Hdr->Pos - ChrPtr(Hdr->ReadBuf));
 670
 671                         if (bytes < bufremain)
 672                                 bufremain = bytes;
 673                         StrBufAppendBufPlain(Target, Hdr->Pos, bufremain, 0);
 674                         StrBufCutLeft(Hdr->ReadBuf, bufremain);
 675                 }
 676
 677                 if (bytes > bufremain)
 678                 {
 679                         while ((StrLength(Hdr->ReadBuf) + StrLength(Target) < bytes + baselen) &&
 680                                (retval >= 0))
 681                                 retval = client_read_sslbuffer(Hdr->ReadBuf, timeout);
 682                         if (retval >= 0) {
 683                                 StrBufAppendBuf(Target, Hdr->ReadBuf, 0); /* todo: Buf > bytes? */
 684 #ifdef HTTP_TRACING
 685                                 write(2, "\033[32m", 5);
 686                                 write(2, buf, bytes);
 687                                 write(2, "\033[30m", 5);
 688 #endif
 689                                 return 1;
 690                         }
 691                         else {
 692                                 syslog(2, "client_read_ssl() failed\n");
 693                                 return -1;
 694                         }
 695                 }
 696                 else
 697                         return 1;
 698         }
 699 #endif
 700
 701         retval = StrBufReadBLOBBuffered(Target,
 702                                         Hdr->ReadBuf,
 703                                         &Hdr->Pos,
 704                                         &Hdr->http_sock,
 705                                         1,
 706                                         bytes,
 707                                         O_TERM,
 708                                         &Error);
 709         if (retval < 0) {
 710                 syslog(2, "client_read() failed: %s\n",
 711                         Error);
 712                 wc_backtrace();
 713                 return retval;
 714         }
 715
 716 #ifdef HTTP_TRACING
 717         write(2, "\033[32m", 5);
 718         write(2, buf, bytes);
 719         write(2, "\033[30m", 5);
 720 #endif
 721         return 1;
 722 }
 723
 724
 725 /*
 726  * Begin buffering HTTP output so we can transmit it all in one write operation later.
 727  */
 728 void begin_burst(void)
 729 {
 730         if (WC->WBuf == NULL) {
 731                 WC->WBuf = NewStrBufPlain(NULL, 32768);
 732         }
 733 }
 734
 735
 736 /*
 737  * Finish buffering HTTP output.  [Compress using zlib and] output with a Content-Length: header.
 738  */
 739 long end_burst(void)
 740 {
 741         wcsession *WCC = WC;
 742         const char *ptr, *eptr;
 743         long count;
 744         ssize_t res = 0;
 745         fd_set wset;
 746         int fdflags;
 747
 748         if (!DisableGzip && (WCC->Hdr->HR.gzip_ok))
 749         {
 750                 if (CompressBuffer(WCC->WBuf) > 0)
 751                         hprintf("Content-encoding: gzip\r\n");
 752                 else {
 753                         syslog(LOG_ALERT, "Compression failed: %d [%s] sending uncompressed\n", errno, strerror(errno));
 754                         wc_backtrace();
 755                 }
 756         }
 757
 758         if (WCC->WFBuf != NULL) {
 759                 WildFireSerializePayload(WCC->WFBuf, WCC->HBuf, &WCC->Hdr->nWildfireHeaders, NULL);
 760                 FreeStrBuf(&WCC->WFBuf);
 761         }
 762
 763         if (WCC->Hdr->HR.prohibit_caching)
 764                 hprintf("Pragma: no-cache\r\nCache-Control: no-store\r\nExpires:-1\r\n");
 765         hprintf("Content-length: %d\r\n\r\n", StrLength(WCC->WBuf));
 766
 767         ptr = ChrPtr(WCC->HBuf);
 768         count = StrLength(WCC->HBuf);
 769         eptr = ptr + count;
 770
 771 #ifdef HAVE_OPENSSL
 772         if (is_https) {
 773                 client_write_ssl(WCC->HBuf);
 774                 client_write_ssl(WCC->WBuf);
 775                 return (count);
 776         }
 777 #endif
 778
 779
 780 #ifdef HTTP_TRACING
 781
 782         write(2, "\033[34m", 5);
 783         write(2, ptr, StrLength(WCC->WBuf));
 784         write(2, "\033[30m", 5);
 785 #endif
 786         if (WCC->Hdr->http_sock == -1)
 787                 return -1;
 788         fdflags = fcntl(WC->Hdr->http_sock, F_GETFL);
 789
 790         while ((ptr < eptr) && (WCC->Hdr->http_sock != -1)){
 791                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 792                         FD_ZERO(&wset);
 793                         FD_SET(WCC->Hdr->http_sock, &wset);
 794                         if (select(WCC->Hdr->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 795                                 syslog(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 796                                 return -1;
 797                         }
 798                 }
 799
 800                 if ((WCC->Hdr->http_sock == -1) ||
 801                     (res = write(WCC->Hdr->http_sock,
 802                                  ptr,
 803                                  count)) == -1) {
 804                         syslog(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 805                         wc_backtrace();
 806                         return res;
 807                 }
 808                 count -= res;
 809                 ptr += res;
 810         }
 811
 812         ptr = ChrPtr(WCC->WBuf);
 813         count = StrLength(WCC->WBuf);
 814         eptr = ptr + count;
 815
 816 #ifdef HTTP_TRACING
 817
 818         write(2, "\033[34m", 5);
 819         write(2, ptr, StrLength(WCC->WBuf));
 820         write(2, "\033[30m", 5);
 821 #endif
 822
 823         while ((ptr < eptr) && (WCC->Hdr->http_sock != -1)) {
 824                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 825                         FD_ZERO(&wset);
 826                         FD_SET(WCC->Hdr->http_sock, &wset);
 827                         if (select(WCC->Hdr->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 828                                 syslog(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 829                                 return -1;
 830                         }
 831                 }
 832
 833                 if ((WCC->Hdr->http_sock == -1) ||
 834                     (res = write(WCC->Hdr->http_sock,
 835                                  ptr,
 836                                  count)) == -1) {
 837                         syslog(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 838                         wc_backtrace();
 839                         return res;
 840                 }
 841                 count -= res;
 842                 ptr += res;
 843         }
 844
 845         return StrLength(WCC->WBuf);
 846 }
 847
 848
 849 /*
 850  * lingering_close() a`la Apache. see
 851  * http://www.apache.org/docs/misc/fin_wait_2.html for rationale
 852  */
 853 int lingering_close(int fd)
 854 {
 855         char buf[SIZ];
 856         int i;
 857         fd_set set;
 858         struct timeval tv, start;
 859
 860         gettimeofday(&start, NULL);
 861         if (fd == -1)
 862                 return -1;
 863         shutdown(fd, 1);
 864         do {
 865                 do {
 866                         gettimeofday(&tv, NULL);
 867                         tv.tv_sec = SLEEPING - (tv.tv_sec - start.tv_sec);
 868                         tv.tv_usec = start.tv_usec - tv.tv_usec;
 869                         if (tv.tv_usec < 0) {
 870                                 tv.tv_sec--;
 871                                 tv.tv_usec += 1000000;
 872                         }
 873                         FD_ZERO(&set);
 874                         FD_SET(fd, &set);
 875                         i = select(fd + 1, &set, NULL, NULL, &tv);
 876                 } while (i == -1 && errno == EINTR);
 877
 878                 if (i <= 0)
 879                         break;
 880
 881                 i = read(fd, buf, sizeof buf);
 882         } while (i != 0 && (i != -1 || errno == EINTR));
 883
 884         return close(fd);
 885 }
 886
 887 void
 888 HttpNewModule_TCPSOCKETS
 889 (ParsedHttpHdrs *httpreq)
 890 {
 891
 892         httpreq->ReadBuf = NewStrBufPlain(NULL, SIZ * 4);
 893 }
 894
 895 void
 896 HttpDetachModule_TCPSOCKETS
 897 (ParsedHttpHdrs *httpreq)
 898 {
 899
 900         FlushStrBuf(httpreq->ReadBuf);
 901         ReAdjustEmptyBuf(httpreq->ReadBuf, 4 * SIZ, SIZ);
 902 }
 903
 904 void
 905 HttpDestroyModule_TCPSOCKETS
 906 (ParsedHttpHdrs *httpreq)
 907 {
 908
 909         FreeStrBuf(&httpreq->ReadBuf);
 910 }
 911
 912
 913 void
 914 SessionNewModule_TCPSOCKETS
 915 (wcsession *sess)
 916 {
 917         sess->CLineBuf = NewStrBuf();
 918         sess->MigrateReadLineBuf = NewStrBuf();
 919 }
 920
 921 void
 922 SessionDestroyModule_TCPSOCKETS
 923 (wcsession *sess)
 924 {
 925         FreeStrBuf(&sess->CLineBuf);
 926         FreeStrBuf(&sess->ReadBuf);
 927         sess->ReadPos = NULL;
 928         FreeStrBuf(&sess->MigrateReadLineBuf);
 929         if (sess->serv_sock > 0) {
 930                 syslog(LOG_DEBUG, "Closing socket %d", sess->serv_sock);
 931                 close(sess->serv_sock);
 932         }
 933 }