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,
 279                                 "ERROR: somebody didn't eat his soup! Remaing Chars: %ld [%s]\n",
 280                                 (long)(pche - WCC->ReadPos),
 281                                 pche
 282                         );
 283                         syslog(1,
 284                                 "--------------------------------------------------------------------------------\n"
 285                                 "Whole buf: [%s]\n"
 286                                 "--------------------------------------------------------------------------------\n",
 287                                 pch);
 288                         AppendImportantMessage(HKEY("Suppenkasper alert! watch your webcit logfile and get connected to your favourite opensource Crew."));
 289                 }
 290         }
 291
 292         FlushStrBuf(WCC->ReadBuf);
 293         WCC->ReadPos = NULL;
 294
 295
 296 }
 297
 298
 299 /*
 300  *  send binary to server
 301  *  buf the buffer to write to citadel server
 302  *  nbytes how many bytes to send to citadel server
 303  */
 304 int serv_write(const char *buf, int nbytes)
 305 {
 306         wcsession *WCC = WC;
 307         int bytes_written = 0;
 308         int retval;
 309
 310         FlushReadBuf();
 311         while (bytes_written < nbytes) {
 312                 retval = write(WCC->serv_sock, &buf[bytes_written],
 313                                nbytes - bytes_written);
 314                 if (retval < 1) {
 315                         const char *ErrStr = strerror(errno);
 316                         syslog(1, "serv_write(): Server connection broken: %s\n",
 317                                 (ErrStr)?ErrStr:"");
 318                         close(WCC->serv_sock);
 319                         WCC->serv_sock = (-1);
 320                         WCC->connected = 0;
 321                         WCC->logged_in = 0;
 322                         return 0;
 323                 }
 324                 bytes_written = bytes_written + retval;
 325         }
 326         return 1;
 327 }
 328
 329
 330 /*
 331  *  send line to server
 332  *  string the line to send to the citadel server
 333  */
 334 int serv_puts(const char *string)
 335 {
 336 #ifdef SERV_TRACE
 337         syslog(9, "%3d>>>%s\n", WC->serv_sock, string);
 338 #endif
 339         FlushReadBuf();
 340
 341         if (!serv_write(string, strlen(string)))
 342                 return 0;
 343         return serv_write("\n", 1);
 344 }
 345
 346 /*
 347  *  send line to server
 348  *  string the line to send to the citadel server
 349  */
 350 int serv_putbuf(const StrBuf *string)
 351 {
 352 #ifdef SERV_TRACE
 353         syslog(9, "%3d>>>%s\n", WC->serv_sock, ChrPtr(string));
 354 #endif
 355         FlushReadBuf();
 356
 357         if (!serv_write(ChrPtr(string), StrLength(string)))
 358                 return 0;
 359         return serv_write("\n", 1);
 360 }
 361
 362
 363 /*
 364  *  convenience function to send stuff to the server
 365  *  format the formatstring
 366  *  ... the entities to insert into format
 367  */
 368 int serv_printf(const char *format,...)
 369 {
 370         va_list arg_ptr;
 371         char buf[SIZ];
 372         size_t len;
 373         int rc;
 374
 375         FlushReadBuf();
 376
 377         va_start(arg_ptr, format);
 378         vsnprintf(buf, sizeof buf, format, arg_ptr);
 379         va_end(arg_ptr);
 380
 381         len = strlen(buf);
 382         buf[len++] = '\n';
 383         buf[len] = '\0';
 384         rc = serv_write(buf, len);
 385 #ifdef SERV_TRACE
 386         syslog(9, ">>>%s", buf);
 387 #endif
 388         return rc;
 389 }
 390
 391
 392 /*
 393  * Read binary data from server into memory using a series of server READ commands.
 394  * returns the read content as StrBuf
 395  */
 396 int serv_read_binary(StrBuf *Ret, size_t total_len, StrBuf *Buf)
 397 {
 398         wcsession *WCC = WC;
 399         size_t bytes_read = 0;
 400         size_t this_block = 0;
 401         int rc;
 402
 403         if (Ret == NULL) {
 404                 return -1;
 405         }
 406
 407         while (bytes_read < total_len) {
 408
 409                 if (WCC->serv_sock==-1) {
 410                         FlushStrBuf(Ret);
 411                         return -1;
 412                 }
 413
 414                 serv_printf("READ "SIZE_T_FMT"|"SIZE_T_FMT, bytes_read, total_len-bytes_read);
 415                 if ( (rc = StrBuf_ServGetln(Buf) > 0) && (GetServerStatus(Buf, NULL) == 6) )
 416                 {
 417                         if (rc < 0)
 418                                 return rc;
 419                         StrBufCutLeft(Buf, 4);
 420                         this_block = StrTol(Buf);
 421                         rc = StrBuf_ServGetBLOBBuffered(Ret, this_block);
 422                         if (rc < 0) {
 423                                 syslog(1, "Server connection broken during download\n");
 424                                 wc_backtrace();
 425                                 WCC->serv_sock = (-1);
 426                                 WCC->connected = 0;
 427                                 WCC->logged_in = 0;
 428                                 return rc;
 429                         }
 430                         bytes_read += rc;
 431                 }
 432         }
 433
 434         return StrLength(Ret);
 435 }
 436
 437
 438 int ClientGetLine(ParsedHttpHdrs *Hdr, StrBuf *Target)
 439 {
 440         const char *Error;
 441 #ifdef HAVE_OPENSSL
 442         const char *pch, *pchs;
 443         int rlen, len, retval = 0;
 444
 445         if (is_https) {
 446                 int ntries = 0;
 447                 if (StrLength(Hdr->ReadBuf) > 0) {
 448                         pchs = ChrPtr(Hdr->ReadBuf);
 449                         pch = strchr(pchs, '\n');
 450                         if (pch != NULL) {
 451                                 rlen = 0;
 452                                 len = pch - pchs;
 453                                 if (len > 0 && (*(pch - 1) == '\r') )
 454                                         rlen ++;
 455                                 StrBufSub(Target, Hdr->ReadBuf, 0, len - rlen);
 456                                 StrBufCutLeft(Hdr->ReadBuf, len + 1);
 457                                 return len - rlen;
 458                         }
 459                 }
 460
 461                 while (retval == 0) {
 462                                 pch = NULL;
 463                                 pchs = ChrPtr(Hdr->ReadBuf);
 464                                 if (*pchs != '\0')
 465                                         pch = strchr(pchs, '\n');
 466                                 if (pch == NULL) {
 467                                         retval = client_read_sslbuffer(Hdr->ReadBuf, SLEEPING);
 468                                         pchs = ChrPtr(Hdr->ReadBuf);
 469                                         pch = strchr(pchs, '\n');
 470                                 }
 471                                 if (retval == 0) {
 472                                         sleeeeeeeeeep(1);
 473                                         ntries ++;
 474                                 }
 475                                 if (ntries > 10)
 476                                         return 0;
 477                 }
 478                 if ((retval > 0) && (pch != NULL)) {
 479                         rlen = 0;
 480                         len = pch - pchs;
 481                         if (len > 0 && (*(pch - 1) == '\r') )
 482                                 rlen ++;
 483                         StrBufSub(Target, Hdr->ReadBuf, 0, len - rlen);
 484                         StrBufCutLeft(Hdr->ReadBuf, len + 1);
 485                         return len - rlen;
 486
 487                 }
 488                 else
 489                         return -1;
 490         }
 491         else
 492 #endif
 493                 return StrBufTCP_read_buffered_line_fast(Target,
 494                                                          Hdr->ReadBuf,
 495                                                          &Hdr->Pos,
 496                                                          &Hdr->http_sock,
 497                                                          5,
 498                                                          1,
 499                                                          &Error);
 500 }
 501
 502
 503 /*
 504  * This is a generic function to set up a master socket for listening on
 505  * a TCP port.  The server shuts down if the bind fails.  (IPv4/IPv6 version)
 506  *
 507  * ip_addr      IP address to bind
 508  * port_number  port number to bind
 509  * queue_len    number of incoming connections to allow in the queue
 510  */
 511 int webcit_tcp_server(char *ip_addr, int port_number, int queue_len)
 512 {
 513         struct protoent *p;
 514         struct sockaddr_in6 sin6;
 515         struct sockaddr_in sin4;
 516         int s, i, b;
 517         int ip_version = 6;
 518
 519         memset(&sin6, 0, sizeof(sin6));
 520         memset(&sin4, 0, sizeof(sin4));
 521         sin6.sin6_family = AF_INET6;
 522         sin4.sin_family = AF_INET;
 523
 524         if (    (ip_addr == NULL)                                                       /* any IPv6 */
 525                 || (IsEmptyStr(ip_addr))
 526                 || (!strcmp(ip_addr, "*"))
 527         ) {
 528                 ip_version = 6;
 529                 sin6.sin6_addr = in6addr_any;
 530         }
 531         else if (!strcmp(ip_addr, "0.0.0.0"))                                           /* any IPv4 */
 532         {
 533                 ip_version = 4;
 534                 sin4.sin_addr.s_addr = INADDR_ANY;
 535         }
 536         else if ((strchr(ip_addr, '.')) && (!strchr(ip_addr, ':')))                     /* specific IPv4 */
 537         {
 538                 ip_version = 4;
 539                 if (inet_pton(AF_INET, ip_addr, &sin4.sin_addr) <= 0) {
 540                         syslog(1, "Error binding to [%s] : %s\n", ip_addr, strerror(errno));
 541                         return (-WC_EXIT_BIND);
 542                 }
 543         }
 544         else                                                                            /* specific IPv6 */
 545         {
 546                 ip_version = 6;
 547                 if (inet_pton(AF_INET6, ip_addr, &sin6.sin6_addr) <= 0) {
 548                         syslog(1, "Error binding to [%s] : %s\n", ip_addr, strerror(errno));
 549                         return (-WC_EXIT_BIND);
 550                 }
 551         }
 552
 553         if (port_number == 0) {
 554                 syslog(1, "Cannot start: no port number specified.\n");
 555                 return (-WC_EXIT_BIND);
 556         }
 557         sin6.sin6_port = htons((u_short) port_number);
 558         sin4.sin_port = htons((u_short) port_number);
 559
 560         p = getprotobyname("tcp");
 561
 562         s = socket( ((ip_version == 6) ? PF_INET6 : PF_INET), SOCK_STREAM, (p->p_proto));
 563         if (s < 0) {
 564                 syslog(1, "Can't create a listening socket: %s\n", strerror(errno));
 565                 return (-WC_EXIT_BIND);
 566         }
 567         /* Set some socket options that make sense. */
 568         i = 1;
 569         setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
 570
 571         if (ip_version == 6) {
 572                 b = bind(s, (struct sockaddr *) &sin6, sizeof(sin6));
 573         }
 574         else {
 575                 b = bind(s, (struct sockaddr *) &sin4, sizeof(sin4));
 576         }
 577
 578         if (b < 0) {
 579                 syslog(1, "Can't bind: %s\n", strerror(errno));
 580                 return (-WC_EXIT_BIND);
 581         }
 582
 583         if (listen(s, queue_len) < 0) {
 584                 syslog(1, "Can't listen: %s\n", strerror(errno));
 585                 return (-WC_EXIT_BIND);
 586         }
 587         return (s);
 588 }
 589
 590
 591 /*
 592  * Create a Unix domain socket and listen on it
 593  * sockpath - file name of the unix domain socket
 594  * queue_len - Number of incoming connections to allow in the queue
 595  */
 596 int webcit_uds_server(char *sockpath, int queue_len)
 597 {
 598         struct sockaddr_un addr;
 599         int s;
 600         int i;
 601         int actual_queue_len;
 602
 603         actual_queue_len = queue_len;
 604         if (actual_queue_len < 5) actual_queue_len = 5;
 605
 606         i = unlink(sockpath);
 607         if ((i != 0) && (errno != ENOENT)) {
 608                 syslog(1, "webcit: can't unlink %s: %s\n",
 609                         sockpath, strerror(errno));
 610                 return (-WC_EXIT_BIND);
 611         }
 612
 613         memset(&addr, 0, sizeof(addr));
 614         addr.sun_family = AF_UNIX;
 615         safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
 616
 617         s = socket(AF_UNIX, SOCK_STREAM, 0);
 618         if (s < 0) {
 619                 syslog(1, "webcit: Can't create a unix domain socket: %s\n", strerror(errno));
 620                 return (-WC_EXIT_BIND);
 621         }
 622
 623         if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 624                 syslog(1, "webcit: Can't bind: %s\n",
 625                         strerror(errno));
 626                 return (-WC_EXIT_BIND);
 627         }
 628
 629         if (listen(s, actual_queue_len) < 0) {
 630                 syslog(1, "webcit: Can't listen: %s\n",
 631                         strerror(errno));
 632                 return (-WC_EXIT_BIND);
 633         }
 634
 635         chmod(sockpath, 0777);
 636         return(s);
 637 }
 638
 639
 640
 641
 642 /*
 643  * Read data from the client socket.
 644  *
 645  * sock         socket fd to read from
 646  * buf          buffer to read into
 647  * bytes        number of bytes to read
 648  * timeout      Number of seconds to wait before timing out
 649  *
 650  * Possible return values:
 651  *      1       Requested number of bytes has been read.
 652  *      0       Request timed out.
 653  *      -1      Connection is broken, or other error.
 654  */
 655 int client_read_to(ParsedHttpHdrs *Hdr, StrBuf *Target, int bytes, int timeout)
 656 {
 657         const char *Error;
 658         int retval = 0;
 659
 660 #ifdef HAVE_OPENSSL
 661         if (is_https) {
 662                 long bufremain = 0;
 663                 long baselen;
 664
 665                 baselen = StrLength(Target);
 666
 667                 if (Hdr->Pos == NULL)
 668                         Hdr->Pos = ChrPtr(Hdr->ReadBuf);
 669
 670                 if (StrLength(Hdr->ReadBuf) > 0)
 671                 {
 672                         bufremain = StrLength(Hdr->ReadBuf) - (Hdr->Pos - ChrPtr(Hdr->ReadBuf));
 673
 674                         if (bytes < bufremain)
 675                                 bufremain = bytes;
 676                         StrBufAppendBufPlain(Target, Hdr->Pos, bufremain, 0);
 677                         StrBufCutLeft(Hdr->ReadBuf, bufremain);
 678                 }
 679
 680                 if (bytes > bufremain)
 681                 {
 682                         while ((StrLength(Hdr->ReadBuf) + StrLength(Target) < bytes + baselen) &&
 683                                (retval >= 0))
 684                                 retval = client_read_sslbuffer(Hdr->ReadBuf, timeout);
 685                         if (retval >= 0) {
 686                                 StrBufAppendBuf(Target, Hdr->ReadBuf, 0); /* todo: Buf > bytes? */
 687 #ifdef HTTP_TRACING
 688                                 write(2, "\033[32m", 5);
 689                                 write(2, buf, bytes);
 690                                 write(2, "\033[30m", 5);
 691 #endif
 692                                 return 1;
 693                         }
 694                         else {
 695                                 syslog(2, "client_read_ssl() failed\n");
 696                                 return -1;
 697                         }
 698                 }
 699                 else
 700                         return 1;
 701         }
 702 #endif
 703
 704         retval = StrBufReadBLOBBuffered(Target,
 705                                         Hdr->ReadBuf,
 706                                         &Hdr->Pos,
 707                                         &Hdr->http_sock,
 708                                         1,
 709                                         bytes,
 710                                         O_TERM,
 711                                         &Error);
 712         if (retval < 0) {
 713                 syslog(2, "client_read() failed: %s\n",
 714                         Error);
 715                 wc_backtrace();
 716                 return retval;
 717         }
 718
 719 #ifdef HTTP_TRACING
 720         write(2, "\033[32m", 5);
 721         write(2, buf, bytes);
 722         write(2, "\033[30m", 5);
 723 #endif
 724         return 1;
 725 }
 726
 727
 728 /*
 729  * Begin buffering HTTP output so we can transmit it all in one write operation later.
 730  */
 731 void begin_burst(void)
 732 {
 733         if (WC->WBuf == NULL) {
 734                 WC->WBuf = NewStrBufPlain(NULL, 32768);
 735         }
 736 }
 737
 738
 739 /*
 740  * Finish buffering HTTP output.  [Compress using zlib and] output with a Content-Length: header.
 741  */
 742 long end_burst(void)
 743 {
 744         wcsession *WCC = WC;
 745         const char *ptr, *eptr;
 746         long count;
 747         ssize_t res = 0;
 748         fd_set wset;
 749         int fdflags;
 750
 751         if (!DisableGzip && (WCC->Hdr->HR.gzip_ok))
 752         {
 753                 if (CompressBuffer(WCC->WBuf) > 0)
 754                         hprintf("Content-encoding: gzip\r\n");
 755                 else {
 756                         syslog(LOG_ALERT, "Compression failed: %d [%s] sending uncompressed\n", errno, strerror(errno));
 757                         wc_backtrace();
 758                 }
 759         }
 760
 761         if (WCC->WFBuf != NULL) {
 762                 WildFireSerializePayload(WCC->WFBuf, WCC->HBuf, &WCC->Hdr->nWildfireHeaders, NULL);
 763                 FreeStrBuf(&WCC->WFBuf);
 764         }
 765
 766         if (WCC->Hdr->HR.prohibit_caching)
 767                 hprintf("Pragma: no-cache\r\nCache-Control: no-store\r\nExpires:-1\r\n");
 768         hprintf("Content-length: %d\r\n\r\n", StrLength(WCC->WBuf));
 769
 770         ptr = ChrPtr(WCC->HBuf);
 771         count = StrLength(WCC->HBuf);
 772         eptr = ptr + count;
 773
 774 #ifdef HAVE_OPENSSL
 775         if (is_https) {
 776                 client_write_ssl(WCC->HBuf);
 777                 client_write_ssl(WCC->WBuf);
 778                 return (count);
 779         }
 780 #endif
 781
 782
 783 #ifdef HTTP_TRACING
 784
 785         write(2, "\033[34m", 5);
 786         write(2, ptr, StrLength(WCC->WBuf));
 787         write(2, "\033[30m", 5);
 788 #endif
 789         if (WCC->Hdr->http_sock == -1)
 790                 return -1;
 791         fdflags = fcntl(WC->Hdr->http_sock, F_GETFL);
 792
 793         while ((ptr < eptr) && (WCC->Hdr->http_sock != -1)){
 794                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 795                         FD_ZERO(&wset);
 796                         FD_SET(WCC->Hdr->http_sock, &wset);
 797                         if (select(WCC->Hdr->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 798                                 syslog(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 799                                 return -1;
 800                         }
 801                 }
 802
 803                 if ((WCC->Hdr->http_sock == -1) ||
 804                     (res = write(WCC->Hdr->http_sock,
 805                                  ptr,
 806                                  count)) == -1) {
 807                         syslog(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 808                         wc_backtrace();
 809                         return res;
 810                 }
 811                 count -= res;
 812                 ptr += res;
 813         }
 814
 815         ptr = ChrPtr(WCC->WBuf);
 816         count = StrLength(WCC->WBuf);
 817         eptr = ptr + count;
 818
 819 #ifdef HTTP_TRACING
 820
 821         write(2, "\033[34m", 5);
 822         write(2, ptr, StrLength(WCC->WBuf));
 823         write(2, "\033[30m", 5);
 824 #endif
 825
 826         while ((ptr < eptr) && (WCC->Hdr->http_sock != -1)) {
 827                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 828                         FD_ZERO(&wset);
 829                         FD_SET(WCC->Hdr->http_sock, &wset);
 830                         if (select(WCC->Hdr->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 831                                 syslog(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 832                                 return -1;
 833                         }
 834                 }
 835
 836                 if ((WCC->Hdr->http_sock == -1) ||
 837                     (res = write(WCC->Hdr->http_sock,
 838                                  ptr,
 839                                  count)) == -1) {
 840                         syslog(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 841                         wc_backtrace();
 842                         return res;
 843                 }
 844                 count -= res;
 845                 ptr += res;
 846         }
 847
 848         return StrLength(WCC->WBuf);
 849 }
 850
 851
 852 /*
 853  * lingering_close() a`la Apache. see
 854  * http://www.apache.org/docs/misc/fin_wait_2.html for rationale
 855  */
 856 int lingering_close(int fd)
 857 {
 858         char buf[SIZ];
 859         int i;
 860         fd_set set;
 861         struct timeval tv, start;
 862
 863         gettimeofday(&start, NULL);
 864         if (fd == -1)
 865                 return -1;
 866         shutdown(fd, 1);
 867         do {
 868                 do {
 869                         gettimeofday(&tv, NULL);
 870                         tv.tv_sec = SLEEPING - (tv.tv_sec - start.tv_sec);
 871                         tv.tv_usec = start.tv_usec - tv.tv_usec;
 872                         if (tv.tv_usec < 0) {
 873                                 tv.tv_sec--;
 874                                 tv.tv_usec += 1000000;
 875                         }
 876                         FD_ZERO(&set);
 877                         FD_SET(fd, &set);
 878                         i = select(fd + 1, &set, NULL, NULL, &tv);
 879                 } while (i == -1 && errno == EINTR);
 880
 881                 if (i <= 0)
 882                         break;
 883
 884                 i = read(fd, buf, sizeof buf);
 885         } while (i != 0 && (i != -1 || errno == EINTR));
 886
 887         return close(fd);
 888 }
 889
 890 void
 891 HttpNewModule_TCPSOCKETS
 892 (ParsedHttpHdrs *httpreq)
 893 {
 894
 895         httpreq->ReadBuf = NewStrBufPlain(NULL, SIZ * 4);
 896 }
 897
 898 void
 899 HttpDetachModule_TCPSOCKETS
 900 (ParsedHttpHdrs *httpreq)
 901 {
 902
 903         FlushStrBuf(httpreq->ReadBuf);
 904         ReAdjustEmptyBuf(httpreq->ReadBuf, 4 * SIZ, SIZ);
 905 }
 906
 907 void
 908 HttpDestroyModule_TCPSOCKETS
 909 (ParsedHttpHdrs *httpreq)
 910 {
 911
 912         FreeStrBuf(&httpreq->ReadBuf);
 913 }
 914
 915
 916 void
 917 SessionNewModule_TCPSOCKETS
 918 (wcsession *sess)
 919 {
 920         sess->CLineBuf = NewStrBuf();
 921         sess->MigrateReadLineBuf = NewStrBuf();
 922 }
 923
 924 void
 925 SessionDestroyModule_TCPSOCKETS
 926 (wcsession *sess)
 927 {
 928         FreeStrBuf(&sess->CLineBuf);
 929         FreeStrBuf(&sess->ReadBuf);
 930         sess->ReadPos = NULL;
 931         FreeStrBuf(&sess->MigrateReadLineBuf);
 932         if (sess->serv_sock > 0) {
 933                 syslog(LOG_DEBUG, "Closing socket %d", sess->serv_sock);
 934                 close(sess->serv_sock);
 935         }
 936 }