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