citadel/sysdep.c

   1 /*
   2  * $Id$
   3  *
   4  * Citadel "system dependent" stuff.
   5  * See COPYING for copyright information.
   6  *
   7  * Here's where we (hopefully) have most parts of the Citadel server that
   8  * would need to be altered to run the server in a non-POSIX environment.
   9  *
  10  * If we ever port to a different platform and either have multiple
  11  * variants of this file or simply load it up with #ifdefs.
  12  *
  13  */
  14
  15 #include "sysdep.h"
  16 #include <stdlib.h>
  17 #include <unistd.h>
  18 #include <stdio.h>
  19 #include <fcntl.h>
  20 #include <ctype.h>
  21 #include <signal.h>
  22 #include <sys/types.h>
  23 #include <sys/stat.h>
  24 #include <sys/wait.h>
  25 #include <sys/socket.h>
  26 #include <syslog.h>
  27 #include <sys/syslog.h>
  28
  29 #if TIME_WITH_SYS_TIME
  30 # include <sys/time.h>
  31 # include <time.h>
  32 #else
  33 # if HAVE_SYS_TIME_H
  34 #  include <sys/time.h>
  35 # else
  36 #  include <time.h>
  37 # endif
  38 #endif
  39
  40 #include <limits.h>
  41 #include <sys/resource.h>
  42 #include <netinet/in.h>
  43 #include <netinet/tcp.h>
  44 #include <arpa/inet.h>
  45 #include <netdb.h>
  46 #include <sys/un.h>
  47 #include <string.h>
  48 #include <pwd.h>
  49 #include <errno.h>
  50 #include <stdarg.h>
  51 #include <grp.h>
  52 #include <libcitadel.h>
  53 #include "citadel.h"
  54 #include "server.h"
  55 #include "sysdep_decls.h"
  56 #include "citserver.h"
  57 #include "support.h"
  58 #include "config.h"
  59 #include "database.h"
  60 #include "housekeeping.h"
  61 #include "modules/crypto/serv_crypto.h" /* Needed for init_ssl, client_write_ssl, client_read_ssl, destruct_ssl */
  62 #include "ecrash.h"
  63 #include "context.h"
  64
  65 #ifdef HAVE_SYS_SELECT_H
  66 #include <sys/select.h>
  67 #endif
  68
  69 #ifndef HAVE_SNPRINTF
  70 #include "snprintf.h"
  71 #endif
  72
  73 #include "ctdl_module.h"
  74 #include "threads.h"
  75 #include "user_ops.h"
  76 #include "control.h"
  77
  78
  79 #ifdef DEBUG_MEMORY_LEAKS
  80 struct igheap {
  81         struct igheap *next;
  82         char file[32];
  83         int line;
  84         void *block;
  85 };
  86
  87 struct igheap *igheap = NULL;
  88 #endif
  89
  90
  91 int verbosity = DEFAULT_VERBOSITY;              /* Logging level */
  92
  93 int syslog_facility = LOG_DAEMON;
  94 int enable_syslog = 0;
  95
  96
  97 /*
  98  * CtdlLogPrintf()  ...   Write logging information
  99  */
 100 void CtdlLogPrintf(enum LogLevel loglevel, const char *format, ...) {
 101         va_list arg_ptr;
 102         va_start(arg_ptr, format);
 103         vCtdlLogPrintf(loglevel, format, arg_ptr);
 104         va_end(arg_ptr);
 105 }
 106
 107 void vCtdlLogPrintf(enum LogLevel loglevel, const char *format, va_list arg_ptr)
 108 {
 109         char buf[SIZ], buf2[SIZ];
 110
 111         if (enable_syslog) {
 112                 vsyslog((syslog_facility | loglevel), format, arg_ptr);
 113         }
 114
 115         /* stderr output code */
 116         if (enable_syslog || running_as_daemon) return;
 117
 118         /* if we run in forground and syslog is disabled, log to terminal */
 119         if (loglevel <= verbosity) {
 120                 struct timeval tv;
 121                 struct tm tim;
 122                 time_t unixtime;
 123                 CitContext *CCC = CC;
 124
 125                 gettimeofday(&tv, NULL);
 126                 /* Promote to time_t; types differ on some OSes (like darwin) */
 127                 unixtime = tv.tv_sec;
 128                 localtime_r(&unixtime, &tim);
 129                 if ((CCC != NULL) && (CCC->cs_pid != 0)) {
 130                         sprintf(buf,
 131                                 "%04d/%02d/%02d %2d:%02d:%02d.%06ld [%3d] ",
 132                                 tim.tm_year + 1900, tim.tm_mon + 1,
 133                                 tim.tm_mday, tim.tm_hour, tim.tm_min,
 134                                 tim.tm_sec, (long)tv.tv_usec,
 135                                 CCC->cs_pid);
 136                 } else {
 137                         sprintf(buf,
 138                                 "%04d/%02d/%02d %2d:%02d:%02d.%06ld ",
 139                                 tim.tm_year + 1900, tim.tm_mon + 1,
 140                                 tim.tm_mday, tim.tm_hour, tim.tm_min,
 141                                 tim.tm_sec, (long)tv.tv_usec);
 142                 }
 143                 vsnprintf(buf2, SIZ, format, arg_ptr);
 144
 145                 fprintf(stderr, "%s%s", buf, buf2);
 146                 fflush(stderr);
 147         }
 148 }
 149
 150
 151
 152 /*
 153  * Signal handler to shut down the server.
 154  */
 155
 156 volatile int exit_signal = 0;
 157 volatile int shutdown_and_halt = 0;
 158 volatile int restart_server = 0;
 159 volatile int running_as_daemon = 0;
 160
 161 static RETSIGTYPE signal_cleanup(int signum) {
 162
 163         if (CT)
 164                 CT->signal = signum;
 165         else
 166         {
 167                 CtdlLogPrintf(CTDL_DEBUG, "Caught signal %d; shutting down.\n", signum);
 168                 exit_signal = signum;
 169         }
 170 }
 171
 172 static RETSIGTYPE signal_exit(int signum) {
 173         exit(1);
 174 }
 175
 176
 177
 178 /*
 179  * Some initialization stuff...
 180  */
 181 void init_sysdep(void) {
 182         sigset_t set;
 183
 184         /* Avoid vulnerabilities related to FD_SETSIZE if we can. */
 185 #ifdef FD_SETSIZE
 186 #ifdef RLIMIT_NOFILE
 187         struct rlimit rl;
 188         getrlimit(RLIMIT_NOFILE, &rl);
 189         rl.rlim_cur = FD_SETSIZE;
 190         rl.rlim_max = FD_SETSIZE;
 191         setrlimit(RLIMIT_NOFILE, &rl);
 192 #endif
 193 #endif
 194
 195         /* If we've got OpenSSL, we're going to use it. */
 196 #ifdef HAVE_OPENSSL
 197         init_ssl();
 198 #endif
 199
 200         /*
 201          * Set up a place to put thread-specific data.
 202          * We only need a single pointer per thread - it points to the
 203          * CitContext structure (in the ContextList linked list) of the
 204          * session to which the calling thread is currently bound.
 205          */
 206         if (citthread_key_create(&MyConKey, NULL) != 0) {
 207                 CtdlLogPrintf(CTDL_CRIT, "Can't create TSD key: %s\n",
 208                         strerror(errno));
 209         }
 210
 211         /*
 212          * The action for unexpected signals and exceptions should be to
 213          * call signal_cleanup() to gracefully shut down the server.
 214          */
 215         sigemptyset(&set);
 216         sigaddset(&set, SIGINT);                // intr = shutdown
 217         // sigaddset(&set, SIGQUIT);            // quit = force quit
 218         sigaddset(&set, SIGHUP);
 219         sigaddset(&set, SIGTERM);
 220         // sigaddset(&set, SIGSEGV);            // we want core dumps
 221         // sigaddset(&set, SIGILL);             // we want core dumps
 222         // sigaddset(&set, SIGBUS);
 223         sigprocmask(SIG_UNBLOCK, &set, NULL);
 224
 225         signal(SIGINT, signal_cleanup);         // intr = shutdown
 226         // signal(SIGQUIT, signal_cleanup);     // quit = force quit
 227         signal(SIGHUP, signal_cleanup);
 228         signal(SIGTERM, signal_cleanup);
 229         signal(SIGUSR2, signal_exit);
 230         // signal(SIGSEGV, signal_cleanup);     // we want coredumps
 231         // signal(SIGILL, signal_cleanup);      // we want core dumps
 232         // signal(SIGBUS, signal_cleanup);
 233
 234         /*
 235          * Do not shut down the server on broken pipe signals, otherwise the
 236          * whole Citadel service would come down whenever a single client
 237          * socket breaks.
 238          */
 239         signal(SIGPIPE, SIG_IGN);
 240 }
 241
 242
 243
 244
 245 /*
 246  * This is a generic function to set up a master socket for listening on
 247  * a TCP port.  The server shuts down if the bind fails.
 248  *
 249  */
 250 int ig_tcp_server(char *ip_addr, int port_number, int queue_len, char **errormessage)
 251 {
 252         struct sockaddr_in sin;
 253         int s, i;
 254         int actual_queue_len;
 255
 256         actual_queue_len = queue_len;
 257         if (actual_queue_len < 5) actual_queue_len = 5;
 258
 259         memset(&sin, 0, sizeof(sin));
 260         sin.sin_family = AF_INET;
 261         sin.sin_port = htons((u_short)port_number);
 262         if (ip_addr == NULL) {
 263                 sin.sin_addr.s_addr = INADDR_ANY;
 264         }
 265         else {
 266                 sin.sin_addr.s_addr = inet_addr(ip_addr);
 267         }
 268
 269         if (sin.sin_addr.s_addr == !INADDR_ANY) {
 270                 sin.sin_addr.s_addr = INADDR_ANY;
 271         }
 272
 273         s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 274
 275         if (s < 0) {
 276                 *errormessage = (char*) malloc(SIZ + 1);
 277                 snprintf(*errormessage, SIZ,
 278                                  "citserver: Can't create a socket: %s",
 279                                  strerror(errno));
 280                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 281                 return(-1);
 282         }
 283
 284         i = 1;
 285         setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
 286
 287         if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
 288                 *errormessage = (char*) malloc(SIZ + 1);
 289                 snprintf(*errormessage, SIZ,
 290                                  "citserver: Can't bind: %s",
 291                                  strerror(errno));
 292                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 293                 close(s);
 294                 return(-1);
 295         }
 296
 297         /* set to nonblock - we need this for some obscure situations */
 298         if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
 299                 *errormessage = (char*) malloc(SIZ + 1);
 300                 snprintf(*errormessage, SIZ,
 301                                  "citserver: Can't set socket to non-blocking: %s",
 302                                  strerror(errno));
 303                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 304                 close(s);
 305                 return(-1);
 306         }
 307
 308         if (listen(s, actual_queue_len) < 0) {
 309                 *errormessage = (char*) malloc(SIZ + 1);
 310                 snprintf(*errormessage, SIZ,
 311                                  "citserver: Can't listen: %s",
 312                                  strerror(errno));
 313                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 314                 close(s);
 315                 return(-1);
 316         }
 317
 318         return(s);
 319 }
 320
 321
 322
 323 /*
 324  * Create a Unix domain socket and listen on it
 325  */
 326 int ig_uds_server(char *sockpath, int queue_len, char **errormessage)
 327 {
 328         struct sockaddr_un addr;
 329         int s;
 330         int i;
 331         int actual_queue_len;
 332 #ifdef HAVE_STRUCT_UCRED
 333         int passcred = 1;
 334 #endif
 335
 336         actual_queue_len = queue_len;
 337         if (actual_queue_len < 5) actual_queue_len = 5;
 338
 339         i = unlink(sockpath);
 340         if ((i != 0) && (errno != ENOENT)) {
 341                 *errormessage = (char*) malloc(SIZ + 1);
 342                 snprintf(*errormessage, SIZ, "citserver: can't unlink %s: %s",
 343                         sockpath, strerror(errno));
 344                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 345                 return(-1);
 346         }
 347
 348         memset(&addr, 0, sizeof(addr));
 349         addr.sun_family = AF_UNIX;
 350         safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
 351
 352         s = socket(AF_UNIX, SOCK_STREAM, 0);
 353         if (s < 0) {
 354                 *errormessage = (char*) malloc(SIZ + 1);
 355                 snprintf(*errormessage, SIZ,
 356                          "citserver: Can't create a socket: %s",
 357                          strerror(errno));
 358                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 359                 return(-1);
 360         }
 361
 362         if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 363                 *errormessage = (char*) malloc(SIZ + 1);
 364                 snprintf(*errormessage, SIZ,
 365                          "citserver: Can't bind: %s",
 366                          strerror(errno));
 367                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 368                 return(-1);
 369         }
 370
 371         /* set to nonblock - we need this for some obscure situations */
 372         if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
 373                 *errormessage = (char*) malloc(SIZ + 1);
 374                 snprintf(*errormessage, SIZ,
 375                          "citserver: Can't set socket to non-blocking: %s",
 376                          strerror(errno));
 377                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 378                 close(s);
 379                 return(-1);
 380         }
 381
 382         if (listen(s, actual_queue_len) < 0) {
 383                 *errormessage = (char*) malloc(SIZ + 1);
 384                 snprintf(*errormessage, SIZ,
 385                          "citserver: Can't listen: %s",
 386                          strerror(errno));
 387                 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
 388                 return(-1);
 389         }
 390
 391 #ifdef HAVE_STRUCT_UCRED
 392         setsockopt(s, SOL_SOCKET, SO_PASSCRED, &passcred, sizeof(passcred));
 393 #endif
 394
 395         chmod(sockpath, S_ISGID|S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IWGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH);
 396         return(s);
 397 }
 398
 399
 400
 401 /*
 402  * The following functions implement output buffering on operating systems which
 403  * support it (such as Linux and various BSD flavors).
 404  */
 405 #ifndef HAVE_DARWIN
 406 #ifdef TCP_CORK
 407 #       define HAVE_TCP_BUFFERING
 408 #else
 409 #       ifdef TCP_NOPUSH
 410 #               define HAVE_TCP_BUFFERING
 411 #               define TCP_CORK TCP_NOPUSH
 412 #       endif
 413 #endif /* TCP_CORK */
 414 #endif /* HAVE_DARWIN */
 415
 416 static unsigned on = 1, off = 0;
 417
 418 void buffer_output(void) {
 419 #ifdef HAVE_TCP_BUFFERING
 420 #ifdef HAVE_OPENSSL
 421         if (!CC->redirect_ssl)
 422 #endif
 423                 setsockopt(CC->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
 424 #endif
 425 }
 426
 427 void unbuffer_output(void) {
 428 #ifdef HAVE_TCP_BUFFERING
 429 #ifdef HAVE_OPENSSL
 430         if (!CC->redirect_ssl)
 431 #endif
 432                 setsockopt(CC->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
 433 #endif
 434 }
 435
 436 void flush_output(void) {
 437 #ifdef HAVE_TCP_BUFFERING
 438         struct CitContext *CCC = CC;
 439         setsockopt(CCC->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
 440         setsockopt(CCC->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
 441 #endif
 442 }
 443
 444 /*
 445 static void flush_client_inbuf(void)
 446 {
 447         CitContext *CCC=CC;
 448
 449         FlushStrBuf(CCC->ReadBuf);
 450         CCC->Pos = NULL;
 451
 452 }
 453 */
 454
 455 /*
 456  * client_write()   ...    Send binary data to the client.
 457  */
 458 int client_write(const char *buf, int nbytes)
 459 {
 460         int bytes_written = 0;
 461         int retval;
 462 #ifndef HAVE_TCP_BUFFERING
 463         int old_buffer_len = 0;
 464 #endif
 465         fd_set wset;
 466         CitContext *Ctx;
 467         int fdflags;
 468
 469         if (nbytes < 1) return(0);
 470
 471 //      flush_client_inbuf();
 472         Ctx = CC;
 473         if (Ctx->redirect_buffer != NULL) {
 474                 StrBufAppendBufPlain(Ctx->redirect_buffer,
 475                                      buf, nbytes, 0);
 476                 return 0;
 477         }
 478
 479 #ifdef HAVE_OPENSSL
 480         if (Ctx->redirect_ssl) {
 481                 client_write_ssl(buf, nbytes);
 482                 return 0;
 483         }
 484 #endif
 485         if (Ctx->client_socket == -1) return -1;
 486
 487         fdflags = fcntl(Ctx->client_socket, F_GETFL);
 488
 489         while ((bytes_written < nbytes) && (Ctx->client_socket != -1)){
 490                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 491                         FD_ZERO(&wset);
 492                         FD_SET(Ctx->client_socket, &wset);
 493                         if (select(1, NULL, &wset, NULL, NULL) == -1) {
 494                                 if (errno == EINTR)
 495                                 {
 496                                         CtdlLogPrintf(CTDL_DEBUG, "client_write(%d bytes) select() interrupted.\n", nbytes-bytes_written);
 497                                         if (CtdlThreadCheckStop()) {
 498                                                 CC->kill_me = 1;
 499                                                 return (-1);
 500                                         } else {
 501                                                 /* can't trust fd's and stuff so we need to re-create them */
 502                                                 continue;
 503                                         }
 504                                 } else {
 505                                         CtdlLogPrintf(CTDL_ERR,
 506                                                 "client_write(%d bytes) select failed: %s (%d)\n",
 507                                                 nbytes - bytes_written,
 508                                                 strerror(errno), errno);
 509                                         cit_backtrace();
 510                                         Ctx->kill_me = 1;
 511                                         return -1;
 512                                 }
 513                         }
 514                 }
 515
 516                 retval = write(Ctx->client_socket, &buf[bytes_written],
 517                         nbytes - bytes_written);
 518                 if (retval < 1) {
 519                         CtdlLogPrintf(CTDL_ERR,
 520                                 "client_write(%d bytes) failed: %s (%d)\n",
 521                                 nbytes - bytes_written,
 522                                 strerror(errno), errno);
 523                         cit_backtrace();
 524                         // CtdlLogPrintf(CTDL_DEBUG, "Tried to send: %s",  &buf[bytes_written]);
 525                         Ctx->kill_me = 1;
 526                         return -1;
 527                 }
 528                 bytes_written = bytes_written + retval;
 529         }
 530         return 0;
 531 }
 532
 533 void cputbuf(const StrBuf *Buf) {
 534         client_write(ChrPtr(Buf), StrLength(Buf));
 535 }
 536
 537
 538 /*
 539  * cprintf()    Send formatted printable data to the client.
 540  *              Implemented in terms of client_write() so it's technically not sysdep...
 541  */
 542 void cprintf(const char *format, ...) {
 543         va_list arg_ptr;
 544         char buf[1024];
 545
 546         va_start(arg_ptr, format);
 547         if (vsnprintf(buf, sizeof buf, format, arg_ptr) == -1)
 548                 buf[sizeof buf - 2] = '\n';
 549         client_write(buf, strlen(buf));
 550         va_end(arg_ptr);
 551 }
 552
 553
 554 /*
 555  * Read data from the client socket.
 556  *
 557  * sock         socket fd to read from
 558  * buf          buffer to read into
 559  * bytes        number of bytes to read
 560  * timeout      Number of seconds to wait before timing out
 561  *
 562  * Possible return values:
 563  *      1       Requested number of bytes has been read.
 564  *      0       Request timed out.
 565  *      -1      Connection is broken, or other error.
 566  */
 567 int client_read_blob(StrBuf *Target, int bytes, int timeout)
 568 {
 569         CitContext *CCC=CC;
 570         const char *Error;
 571         int retval = 0;
 572
 573 #ifdef HAVE_OPENSSL
 574         if (CCC->redirect_ssl) {
 575                 retval = client_read_sslblob(Target, bytes, timeout);
 576                 if (retval < 0) {
 577                         CtdlLogPrintf(CTDL_CRIT,
 578                                       "%s failed\n",
 579                                       __FUNCTION__);
 580                 }
 581         }
 582         else
 583 #endif
 584         {
 585                 retval = StrBufReadBLOBBuffered(Target,
 586                                                 CCC->ReadBuf,
 587                                                 &CCC->Pos,
 588                                                 &CCC->client_socket,
 589                                                 1,
 590                                                 bytes,
 591                                                 O_TERM,
 592                                                 &Error);
 593                 if (retval < 0) {
 594                         CtdlLogPrintf(CTDL_CRIT,
 595                                       "%s failed: %s\n",
 596                                       __FUNCTION__,
 597                                       Error);
 598                         return retval;
 599                 }
 600                 else
 601                 {
 602 #ifdef BIGBAD_IODBG
 603                         int rv = 0;
 604                         char fn [SIZ];
 605                         FILE *fd;
 606
 607                         snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 608
 609                         fd = fopen(fn, "a+");
 610                         fprintf(fd, "Read: BufSize: %d BufContent: [",
 611                                 StrLength(Target));
 612                         rv = fwrite(ChrPtr(Target), StrLength(Target), 1, fd);
 613                         fprintf(fd, "]\n");
 614
 615
 616                         fclose(fd);
 617 #endif
 618
 619                 }
 620         }
 621         return retval;
 622 }
 623
 624
 625 int client_read_random_blob(StrBuf *Target, int timeout)
 626 {
 627         CitContext *CCC=CC;
 628         int rc;
 629
 630         rc =  client_read_blob(Target, 1, timeout);
 631         if (rc > 0)
 632         {
 633                 long len;
 634                 const char *pch;
 635
 636                 len = StrLength(CCC->ReadBuf);
 637                 pch = ChrPtr(CCC->ReadBuf);
 638
 639                 if (len > 0)
 640                 {
 641                         if (CCC->Pos != NULL) {
 642                                 len -= CCC->Pos - pch;
 643                                 pch = CCC->Pos;
 644                         }
 645                         StrBufAppendBufPlain(Target, pch, len, 0);
 646                         FlushStrBuf(CCC->ReadBuf);
 647                         CCC->Pos = NULL;
 648                         return StrLength(Target);
 649                 }
 650                 return rc;
 651         }
 652         else
 653                 return rc;
 654 }
 655
 656 int client_read_to(char *buf, int bytes, int timeout)
 657 {
 658         CitContext *CCC=CC;
 659         int rc;
 660
 661         rc = client_read_blob(CCC->MigrateBuf, bytes, timeout);
 662         if (rc < 0)
 663         {
 664                 *buf = '\0';
 665                 return rc;
 666         }
 667         else
 668         {
 669                 memcpy(buf,
 670                        ChrPtr(CCC->MigrateBuf),
 671                        StrLength(CCC->MigrateBuf) + 1);
 672                 FlushStrBuf(CCC->MigrateBuf);
 673                 return rc;
 674         }
 675 }
 676
 677
 678 int HaveMoreLinesWaiting(CitContext *CCC)
 679 {
 680         if ((CCC->kill_me == 1) || (
 681             (CCC->Pos == NULL) &&
 682             (StrLength(CCC->ReadBuf) == 0) &&
 683             (CCC->client_socket != -1)) )
 684                 return 0;
 685         else
 686                 return 1;
 687 }
 688
 689
 690 /*
 691  * Read data from the client socket with default timeout.
 692  * (This is implemented in terms of client_read_to() and could be
 693  * justifiably moved out of sysdep.c)
 694  */
 695 INLINE int client_read(char *buf, int bytes)
 696 {
 697         return(client_read_to(buf, bytes, config.c_sleeping));
 698 }
 699
 700 int CtdlClientGetLine(StrBuf *Target)
 701 {
 702         CitContext *CCC=CC;
 703         const char *Error;
 704         int rc;
 705
 706         FlushStrBuf(Target);
 707 #ifdef HAVE_OPENSSL
 708         if (CCC->redirect_ssl) {
 709 #ifdef BIGBAD_IODBG
 710                 char fn [SIZ];
 711                 FILE *fd;
 712                 int len = 0;
 713                 int rlen = 0;
 714                 int  nlen = 0;
 715                 int nrlen = 0;
 716                 const char *pch;
 717
 718                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 719
 720                 fd = fopen(fn, "a+");
 721                 pch = ChrPtr(CCC->ReadBuf);
 722                 len = StrLength(CCC->ReadBuf);
 723                 if (CCC->Pos != NULL)
 724                         rlen = CC->Pos - pch;
 725                 else
 726                         rlen = 0;
 727
 728 /*              fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \nBufContent: [%s]\n\n_____________________\n",
 729                         len, rlen, pch);
 730 */
 731                 fprintf(fd, "\n\n\nSSL1: BufSize: %d BufPos: %d \n_____________________\n",
 732                         len, rlen);
 733 #endif
 734                 rc = client_readline_sslbuffer(Target,
 735                                                CCC->ReadBuf,
 736                                                &CCC->Pos,
 737                                                1);
 738 #ifdef BIGBAD_IODBG
 739                 pch = ChrPtr(CCC->ReadBuf);
 740                 nlen = StrLength(CCC->ReadBuf);
 741                 if (CCC->Pos != NULL)
 742                         nrlen = CC->Pos - pch;
 743                 else
 744                         nrlen = 0;
 745 /*
 746                 fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \nBufContent: [%s]\n\n_____________________\n",
 747                         len, nlen, rlen, nrlen, pch);
 748 */
 749                 fprintf(fd, "\n\n\nSSL2: BufSize: was: %d is: %d BufPos: was: %d is: %d \n",
 750                         len, nlen, rlen, nrlen);
 751
 752                 fprintf(fd, "SSL3: Read: BufSize: %d BufContent: [%s]\n\n*************\n",
 753                         StrLength(Target), ChrPtr(Target));
 754                 fclose(fd);
 755
 756                 if (rc < 0)
 757                         CtdlLogPrintf(CTDL_CRIT,
 758                                       "%s failed\n",
 759                                       __FUNCTION__);
 760 #endif
 761                 return rc;
 762         }
 763         else
 764 #endif
 765         {
 766 #ifdef BIGBAD_IODBG
 767                 char fn [SIZ];
 768                 FILE *fd;
 769                 int len, rlen, nlen, nrlen;
 770                 const char *pch;
 771
 772                 snprintf(fn, SIZ, "/tmp/foolog_%s.%d", CCC->ServiceName, CCC->cs_pid);
 773
 774                 fd = fopen(fn, "a+");
 775                 pch = ChrPtr(CCC->ReadBuf);
 776                 len = StrLength(CCC->ReadBuf);
 777                 if (CCC->Pos != NULL)
 778                         rlen = CC->Pos - pch;
 779                 else
 780                         rlen = 0;
 781
 782 /*              fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \nBufContent: [%s]\n\n_____________________\n",
 783                         len, rlen, pch);
 784 */
 785                 fprintf(fd, "\n\n\nBufSize: %d BufPos: %d \n_____________________\n",
 786                         len, rlen);
 787 #endif
 788                 rc = StrBufTCP_read_buffered_line_fast(Target,
 789                                                        CCC->ReadBuf,
 790                                                        &CCC->Pos,
 791                                                        &CCC->client_socket,
 792                                                        5,
 793                                                        1,
 794                                                        &Error);
 795
 796 #ifdef BIGBAD_IODBG
 797                 pch = ChrPtr(CCC->ReadBuf);
 798                 nlen = StrLength(CCC->ReadBuf);
 799                 if (CCC->Pos != NULL)
 800                         nrlen = CC->Pos - pch;
 801                 else
 802                         nrlen = 0;
 803 /*
 804                 fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \nBufContent: [%s]\n\n_____________________\n",
 805                         len, nlen, rlen, nrlen, pch);
 806 */
 807                 fprintf(fd, "\n\n\nBufSize: was: %d is: %d BufPos: was: %d is: %d \n",
 808                         len, nlen, rlen, nrlen);
 809
 810                 fprintf(fd, "Read: BufSize: %d BufContent: [%s]\n\n*************\n",
 811                         StrLength(Target), ChrPtr(Target));
 812                 fclose(fd);
 813
 814                 if ((rc < 0) && (Error != NULL))
 815                         CtdlLogPrintf(CTDL_CRIT,
 816                                       "%s failed: %s\n",
 817                                       __FUNCTION__,
 818                                       Error);
 819 #endif
 820                 return rc;
 821         }
 822 }
 823
 824
 825 /*
 826  * client_getln()   ...   Get a LF-terminated line of text from the client.
 827  * (This is implemented in terms of client_read() and could be
 828  * justifiably moved out of sysdep.c)
 829  */
 830 int client_getln(char *buf, int bufsize)
 831 {
 832         int i, retval;
 833         CitContext *CCC=CC;
 834         const char *pCh;
 835
 836         retval = CtdlClientGetLine(CCC->MigrateBuf);
 837         if (retval < 0)
 838           return(retval >= 0);
 839
 840
 841         i = StrLength(CCC->MigrateBuf);
 842         pCh = ChrPtr(CCC->MigrateBuf);
 843         /* Strip the trailing LF, and the trailing CR if present.
 844          */
 845         if (bufsize <= i)
 846                 i = bufsize - 1;
 847         while ( (i > 0)
 848                 && ( (pCh[i - 1]==13)
 849                      || ( pCh[i - 1]==10)) ) {
 850                 i--;
 851         }
 852         memcpy(buf, pCh, i);
 853         buf[i] = 0;
 854
 855         FlushStrBuf(CCC->MigrateBuf);
 856         if (retval < 0) {
 857                 safestrncpy(&buf[i], "000", bufsize - i);
 858         }
 859         return(retval >= 0);
 860 }
 861
 862
 863 /*
 864  * Cleanup any contexts that are left lying around
 865  */
 866
 867
 868 void close_masters (void)
 869 {
 870         struct ServiceFunctionHook *serviceptr;
 871
 872         /*
 873          * close all protocol master sockets
 874          */
 875         for (serviceptr = ServiceHookTable; serviceptr != NULL;
 876             serviceptr = serviceptr->next ) {
 877
 878                 if (serviceptr->tcp_port > 0)
 879                 {
 880                         CtdlLogPrintf(CTDL_INFO, "Closing listener on port %d\n",
 881                                 serviceptr->tcp_port);
 882                         serviceptr->tcp_port = 0;
 883                 }
 884
 885                 if (serviceptr->sockpath != NULL)
 886                         CtdlLogPrintf(CTDL_INFO, "Closing listener on '%s'\n",
 887                                 serviceptr->sockpath);
 888
 889                 close(serviceptr->msock);
 890                 /* If it's a Unix domain socket, remove the file. */
 891                 if (serviceptr->sockpath != NULL) {
 892                         unlink(serviceptr->sockpath);
 893                         serviceptr->sockpath = NULL;
 894                 }
 895         }
 896 }
 897
 898
 899 /*
 900  * The system-dependent part of master_cleanup() - close the master socket.
 901  */
 902 void sysdep_master_cleanup(void) {
 903
 904         close_masters();
 905
 906         context_cleanup();
 907
 908 #ifdef HAVE_OPENSSL
 909         destruct_ssl();
 910 #endif
 911         CtdlDestroyProtoHooks();
 912         CtdlDestroyDeleteHooks();
 913         CtdlDestroyXmsgHooks();
 914         CtdlDestroyNetprocHooks();
 915         CtdlDestroyUserHooks();
 916         CtdlDestroyMessageHook();
 917         CtdlDestroyCleanupHooks();
 918         CtdlDestroyFixedOutputHooks();
 919         CtdlDestroySessionHooks();
 920         CtdlDestroyServiceHook();
 921         CtdlDestroyRoomHooks();
 922         #ifdef HAVE_BACKTRACE
 923 ///     eCrash_Uninit();
 924         #endif
 925 }
 926
 927
 928
 929 pid_t current_child;
 930 void graceful_shutdown(int signum) {
 931         kill(current_child, signum);
 932         unlink(file_pid_file);
 933         exit(0);
 934 }
 935
 936 int nFireUps = 0;
 937 int nFireUpsNonRestart = 0;
 938 pid_t ForkedPid = 1;
 939
 940 /*
 941  * Start running as a daemon.
 942  */
 943 void start_daemon(int unused) {
 944         int status = 0;
 945         pid_t child = 0;
 946         FILE *fp;
 947         int do_restart = 0;
 948
 949         current_child = 0;
 950
 951         /* Close stdin/stdout/stderr and replace them with /dev/null.
 952          * We don't just call close() because we don't want these fd's
 953          * to be reused for other files.
 954          */
 955         if (chdir(ctdl_run_dir) != 0)
 956                 CtdlLogPrintf(CTDL_EMERG,
 957                               "unable to change into directory [%s]: %s",
 958                               ctdl_run_dir, strerror(errno));
 959
 960         child = fork();
 961         if (child != 0) {
 962                 exit(0);
 963         }
 964
 965         signal(SIGHUP, SIG_IGN);
 966         signal(SIGINT, SIG_IGN);
 967         signal(SIGQUIT, SIG_IGN);
 968
 969         setsid();
 970         umask(0);
 971         if ((freopen("/dev/null", "r", stdin) != stdin) ||
 972             (freopen("/dev/null", "w", stdout) != stdout) ||
 973             (freopen("/dev/null", "w", stderr) != stderr))
 974                 CtdlLogPrintf(CTDL_EMERG,
 975                               "unable to reopen stdin/out/err %s",
 976                               strerror(errno));
 977
 978
 979         do {
 980                 current_child = fork();
 981
 982                 signal(SIGTERM, graceful_shutdown);
 983
 984                 if (current_child < 0) {
 985                         perror("fork");
 986                         exit(errno);
 987                 }
 988
 989                 else if (current_child == 0) {
 990                         return; /* continue starting citadel. */
 991                 }
 992
 993                 else {
 994                         fp = fopen(file_pid_file, "w");
 995                         if (fp != NULL) {
 996                                 fprintf(fp, ""F_PID_T"\n", getpid());
 997                                 fclose(fp);
 998                         }
 999                         waitpid(current_child, &status, 0);
1000                 }
1001                 do_restart = 0;
1002                 nFireUpsNonRestart = nFireUps;
1003
1004                 /* Exit code 0 means the watcher should exit */
1005                 if (WIFEXITED(status) && (WEXITSTATUS(status) == CTDLEXIT_SHUTDOWN)) {
1006                         do_restart = 0;
1007                 }
1008
1009                 /* Exit code 101-109 means the watcher should exit */
1010                 else if (WIFEXITED(status) && (WEXITSTATUS(status) >= 101) && (WEXITSTATUS(status) <= 109)) {
1011                         do_restart = 0;
1012                 }
1013
1014                 /* Any other exit code, or no exit code, means we should restart. */
1015                 else {
1016                         do_restart = 1;
1017                         nFireUps++;
1018                         ForkedPid = current_child;
1019                 }
1020
1021         } while (do_restart);
1022
1023         unlink(file_pid_file);
1024         exit(WEXITSTATUS(status));
1025 }
1026
1027
1028
1029 void checkcrash(void)
1030 {
1031         if (nFireUpsNonRestart != nFireUps)
1032         {
1033                 StrBuf *CrashMail;
1034
1035                 CrashMail = NewStrBuf();
1036                 CtdlLogPrintf(CTDL_ALERT, "Posting crash message\n");
1037                 StrBufPrintf(CrashMail,
1038                         " \n"
1039                         " The Citadel server process (citserver) terminated unexpectedly."
1040                         "\n \n"
1041                         " This could be the result of a bug in the server program, or some external "
1042                         "factor.\n \n"
1043                         " You can obtain more information about this by enabling core dumps.\n \n"
1044                         " For more information, please see:\n \n"
1045                         " http://citadel.org/doku.php/faq:mastering_your_os:gdb#how.do.i.make.my.system.produce.core-files"
1046                         "\n \n"
1047
1048                         " If you have already done this, the core dump is likely to be found at %score.%d\n"
1049                         ,
1050                         ctdl_run_dir, ForkedPid);
1051                 CtdlAideMessage(ChrPtr(CrashMail), "Citadel server process terminated unexpectedly");
1052                 FreeStrBuf(&CrashMail);
1053         }
1054 }
1055
1056
1057 /*
1058  * Generic routine to convert a login name to a full name (gecos)
1059  * Returns nonzero if a conversion took place
1060  */
1061 int convert_login(char NameToConvert[]) {
1062         struct passwd *pw;
1063         int a;
1064
1065         pw = getpwnam(NameToConvert);
1066         if (pw == NULL) {
1067                 return(0);
1068         }
1069         else {
1070                 strcpy(NameToConvert, pw->pw_gecos);
1071                 for (a=0; a<strlen(NameToConvert); ++a) {
1072                         if (NameToConvert[a] == ',') NameToConvert[a] = 0;
1073                 }
1074                 return(1);
1075         }
1076 }
1077
1078
1079
1080 /*
1081  * This loop just keeps going and going and going...
1082  */
1083 /*
1084  * FIXME:
1085  * This current implimentation of worker_thread creates a bottle neck in several situations
1086  * The first thing to remember is that a single thread can handle more than one connection at a time.
1087  * More threads mean less memory for the system to run in.
1088  * So for efficiency we want every thread to be doing something useful or waiting in the main loop for
1089  * something to happen anywhere.
1090  * This current implimentation requires worker threads to wait in other locations, after it has
1091  * been committed to a single connection which is very wasteful.
1092  * As an extreme case consider this:
1093  * A slow client connects and this slow client sends only one character each second.
1094  * With this current implimentation a single worker thread is dispatched to handle that connection
1095  * until such times as the client timeout expires, an error occurs on the socket or the client
1096  * completes its transmission.
1097  * THIS IS VERY BAD since that thread could have handled a read from many more clients in each one
1098  * second interval between chars.
1099  *
1100  * It is my intention to re-write this code and the associated client_getln, client_read functions
1101  * to allow any thread to read data on behalf of any connection (context).
1102  * To do this I intend to have this main loop read chars into a buffer stored in the context.
1103  * Once the correct criteria for a full buffer is met then we will dispatch a thread to
1104  * process it.
1105  * This worker thread loop also needs to be able to handle binary data.
1106  */
1107
1108 void *worker_thread(void *arg) {
1109         int highest;
1110         CitContext *ptr;
1111         CitContext *bind_me = NULL;
1112         fd_set readfds;
1113         int retval = 0;
1114         struct timeval tv;
1115         int force_purge = 0;
1116
1117
1118         while (!CtdlThreadCheckStop()) {
1119
1120                 /* make doubly sure we're not holding any stale db handles
1121                  * which might cause a deadlock.
1122                  */
1123                 cdb_check_handles();
1124 do_select:      force_purge = 0;
1125                 bind_me = NULL;         /* Which session shall we handle? */
1126
1127                 /* Initialize the fdset. */
1128                 FD_ZERO(&readfds);
1129                 highest = 0;
1130
1131                 begin_critical_section(S_SESSION_TABLE);
1132                 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1133                         int client_socket;
1134                         client_socket = ptr->client_socket;
1135                         /* Dont select on dead sessions only truly idle ones */
1136                         if ((ptr->state == CON_IDLE) &&
1137                             (CC->kill_me == 0) &&
1138                             (client_socket != -1))
1139                         {
1140                                 FD_SET(client_socket, &readfds);
1141                                 if (client_socket > highest)
1142                                         highest = client_socket;
1143                         }
1144                         if ((bind_me == NULL) && (ptr->state == CON_READY)) {
1145                                 bind_me = ptr;
1146                                 ptr->state = CON_EXECUTING;
1147                                 break;
1148                         }
1149                         if ((bind_me == NULL) && (ptr->state == CON_GREETING)) {
1150                                 bind_me = ptr;
1151                                 ptr->state = CON_STARTING;
1152                                 break;
1153                         }
1154                 }
1155                 end_critical_section(S_SESSION_TABLE);
1156
1157                 if (bind_me) {
1158                         goto SKIP_SELECT;
1159                 }
1160
1161                 /* If we got this far, it means that there are no sessions
1162                  * which a previous thread marked for attention, so we go
1163                  * ahead and get ready to select().
1164                  */
1165
1166                 if (!CtdlThreadCheckStop()) {
1167                         tv.tv_sec = 1;          /* wake up every second if no input */
1168                         tv.tv_usec = 0;
1169                         retval = CtdlThreadSelect(highest + 1, &readfds, NULL, NULL, &tv);
1170                 }
1171                 else
1172                         return NULL;
1173
1174                 /* Now figure out who made this select() unblock.
1175                  * First, check for an error or exit condition.
1176                  */
1177                 if (retval < 0) {
1178                         if (errno == EBADF) {
1179                                 CtdlLogPrintf(CTDL_NOTICE, "select() failed: (%s)\n",
1180                                         strerror(errno));
1181                                 goto do_select;
1182                         }
1183                         if (errno != EINTR) {
1184                                 CtdlLogPrintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
1185                                 CtdlThreadStopAll();
1186                                 continue;
1187                         } else {
1188                                 CtdlLogPrintf(CTDL_DEBUG, "Interrupted CtdlThreadSelect.\n");
1189                                 if (CtdlThreadCheckStop()) return(NULL);
1190                                 goto do_select;
1191                         }
1192                 }
1193                 else if(retval == 0) {
1194                         if (CtdlThreadCheckStop()) return(NULL);
1195                 }
1196
1197                 /* It must be a client socket.  Find a context that has data
1198                  * waiting on its socket *and* is in the CON_IDLE state.  Any
1199                  * active sockets other than our chosen one are marked as
1200                  * CON_READY so the next thread that comes around can just bind
1201                  * to one without having to select() again.
1202                  */
1203                 begin_critical_section(S_SESSION_TABLE);
1204                 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1205                         int checkfd = ptr->client_socket;
1206                         if ((checkfd != -1) && (ptr->state == CON_IDLE) ){
1207                                 if (FD_ISSET(checkfd, &readfds)) {
1208                                         ptr->input_waiting = 1;
1209                                         if (!bind_me) {
1210                                                 bind_me = ptr;  /* I choose you! */
1211                                                 bind_me->state = CON_EXECUTING;
1212                                         }
1213                                         else {
1214                                                 ptr->state = CON_READY;
1215                                         }
1216                                 } else if ((ptr->is_async) && (ptr->async_waiting) && (ptr->h_async_function)) {
1217                                         if (!bind_me) {
1218                                                 bind_me = ptr;  /* I choose you! */
1219                                                 bind_me->state = CON_EXECUTING;
1220                                         }
1221                                         else {
1222                                                 ptr->state = CON_READY;
1223                                         }
1224                                 }
1225                         }
1226                 }
1227                 end_critical_section(S_SESSION_TABLE);
1228
1229 SKIP_SELECT:
1230                 /* We're bound to a session */
1231                 if (bind_me != NULL) {
1232                         become_session(bind_me);
1233
1234                         if (bind_me->state == CON_STARTING) {
1235                                 bind_me->state = CON_EXECUTING;
1236                                 begin_session(bind_me);
1237                                 bind_me->h_greeting_function();
1238                         }
1239                         /* If the client has sent a command, execute it. */
1240                         if (CC->input_waiting) {
1241                                 CC->h_command_function();
1242
1243                                 while (HaveMoreLinesWaiting(CC))
1244                                        CC->h_command_function();
1245
1246                                 CC->input_waiting = 0;
1247                         }
1248
1249                         /* If there are asynchronous messages waiting and the
1250                          * client supports it, do those now */
1251                         if ((CC->is_async) && (CC->async_waiting)
1252                            && (CC->h_async_function != NULL)) {
1253                                 CC->h_async_function();
1254                                 CC->async_waiting = 0;
1255                         }
1256
1257                         force_purge = CC->kill_me;
1258                         become_session(NULL);
1259                         bind_me->state = CON_IDLE;
1260                 }
1261
1262                 dead_session_purge(force_purge);
1263                 do_housekeeping();
1264         }
1265         /* If control reaches this point, the server is shutting down */
1266         return(NULL);
1267 }
1268
1269
1270
1271
1272 /*
1273  * A function to handle selecting on master sockets.
1274  * In other words it handles new connections.
1275  * It is a thread.
1276  */
1277 void *select_on_master (void *arg)
1278 {
1279         struct ServiceFunctionHook *serviceptr;
1280         fd_set master_fds;
1281         int highest;
1282         struct timeval tv;
1283         int ssock;                      /* Descriptor for client socket */
1284         CitContext *con= NULL;  /* Temporary context pointer */
1285         int m;
1286         int i;
1287         int retval;
1288
1289         while (!CtdlThreadCheckStop()) {
1290                 /* Initialize the fdset. */
1291                 FD_ZERO(&master_fds);
1292                 highest = 0;
1293
1294                 /* First, add the various master sockets to the fdset. */
1295                 for (serviceptr = ServiceHookTable; serviceptr != NULL;
1296                 serviceptr = serviceptr->next ) {
1297                         m = serviceptr->msock;
1298                         FD_SET(m, &master_fds);
1299                         if (m > highest) {
1300                                 highest = m;
1301                         }
1302                 }
1303
1304                 if (!CtdlThreadCheckStop()) {
1305                         tv.tv_sec = 60;         /* wake up every second if no input */
1306                         tv.tv_usec = 0;
1307                         retval = CtdlThreadSelect(highest + 1, &master_fds, NULL, NULL, &tv);
1308                 }
1309                 else
1310                         return NULL;
1311
1312                 /* Now figure out who made this select() unblock.
1313                  * First, check for an error or exit condition.
1314                  */
1315                 if (retval < 0) {
1316                         if (errno == EBADF) {
1317                                 CtdlLogPrintf(CTDL_NOTICE, "select() failed: (%s)\n",
1318                                         strerror(errno));
1319                                 continue;
1320                         }
1321                         if (errno != EINTR) {
1322                                 CtdlLogPrintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
1323                                 CtdlThreadStopAll();
1324                         } else {
1325                                 CtdlLogPrintf(CTDL_DEBUG, "Interrupted CtdlThreadSelect.\n");
1326                                 if (CtdlThreadCheckStop()) return(NULL);
1327                                 continue;
1328                         }
1329                 }
1330                 else if(retval == 0) {
1331                         if (CtdlThreadCheckStop()) return(NULL);
1332                         continue;
1333                 }
1334                 /* Next, check to see if it's a new client connecting
1335                  * on a master socket.
1336                  */
1337                 else for (serviceptr = ServiceHookTable; serviceptr != NULL;
1338                      serviceptr = serviceptr->next ) {
1339
1340                         if (FD_ISSET(serviceptr->msock, &master_fds)) {
1341                                 ssock = accept(serviceptr->msock, NULL, 0);
1342                                 if (ssock >= 0) {
1343                                         CtdlLogPrintf(CTDL_DEBUG,
1344                                                 "New client socket %d\n",
1345                                                 ssock);
1346
1347                                         /* The master socket is non-blocking but the client
1348                                          * sockets need to be blocking, otherwise certain
1349                                          * operations barf on FreeBSD.  Not a fatal error.
1350                                          */
1351                                         if (fcntl(ssock, F_SETFL, 0) < 0) {
1352                                                 CtdlLogPrintf(CTDL_EMERG,
1353                                                         "citserver: Can't set socket to blocking: %s\n",
1354                                                         strerror(errno));
1355                                         }
1356
1357                                         /* New context will be created already
1358                                          * set up in the CON_EXECUTING state.
1359                                          */
1360                                         con = CreateNewContext();
1361
1362                                         /* Assign our new socket number to it. */
1363                                         con->client_socket = ssock;
1364                                         con->h_command_function =
1365                                                 serviceptr->h_command_function;
1366                                         con->h_async_function =
1367                                                 serviceptr->h_async_function;
1368                                         con->h_greeting_function = serviceptr->h_greeting_function;
1369                                         con->ServiceName =
1370                                                 serviceptr->ServiceName;
1371
1372                                         /* Determine whether it's a local socket */
1373                                         if (serviceptr->sockpath != NULL)
1374                                                 con->is_local_socket = 1;
1375
1376                                         /* Set the SO_REUSEADDR socket option */
1377                                         i = 1;
1378                                         setsockopt(ssock, SOL_SOCKET,
1379                                                 SO_REUSEADDR,
1380                                                 &i, sizeof(i));
1381
1382                                         con->state = CON_GREETING;
1383
1384                                         retval--;
1385                                         if (retval == 0)
1386                                                 break;
1387                                 }
1388                         }
1389                 }
1390         }
1391         return NULL;
1392 }
1393
1394
1395
1396 /*
1397  * SyslogFacility()
1398  * Translate text facility name to syslog.h defined value.
1399  */
1400 int SyslogFacility(char *name)
1401 {
1402         int i;
1403         struct
1404         {
1405                 int facility;
1406                 char *name;
1407         }   facTbl[] =
1408         {
1409                 {   LOG_KERN,   "kern"          },
1410                 {   LOG_USER,   "user"          },
1411                 {   LOG_MAIL,   "mail"          },
1412                 {   LOG_DAEMON, "daemon"        },
1413                 {   LOG_AUTH,   "auth"          },
1414                 {   LOG_SYSLOG, "syslog"        },
1415                 {   LOG_LPR,    "lpr"           },
1416                 {   LOG_NEWS,   "news"          },
1417                 {   LOG_UUCP,   "uucp"          },
1418                 {   LOG_LOCAL0, "local0"        },
1419                 {   LOG_LOCAL1, "local1"        },
1420                 {   LOG_LOCAL2, "local2"        },
1421                 {   LOG_LOCAL3, "local3"        },
1422                 {   LOG_LOCAL4, "local4"        },
1423                 {   LOG_LOCAL5, "local5"        },
1424                 {   LOG_LOCAL6, "local6"        },
1425                 {   LOG_LOCAL7, "local7"        },
1426                 {   0,            NULL          }
1427         };
1428         for(i = 0; facTbl[i].name != NULL; i++) {
1429                 if(!strcasecmp(name, facTbl[i].name))
1430                         return facTbl[i].facility;
1431         }
1432         enable_syslog = 0;
1433         return LOG_DAEMON;
1434 }
1435
1436
1437 /********** MEM CHEQQER ***********/
1438
1439 #ifdef DEBUG_MEMORY_LEAKS
1440
1441 #undef malloc
1442 #undef realloc
1443 #undef strdup
1444 #undef free
1445
1446 void *tracked_malloc(size_t size, char *file, int line) {
1447         struct igheap *thisheap;
1448         void *block;
1449
1450         block = malloc(size);
1451         if (block == NULL) return(block);
1452
1453         thisheap = malloc(sizeof(struct igheap));
1454         if (thisheap == NULL) {
1455                 free(block);
1456                 return(NULL);
1457         }
1458
1459         thisheap->block = block;
1460         strcpy(thisheap->file, file);
1461         thisheap->line = line;
1462
1463         begin_critical_section(S_DEBUGMEMLEAKS);
1464         thisheap->next = igheap;
1465         igheap = thisheap;
1466         end_critical_section(S_DEBUGMEMLEAKS);
1467
1468         return(block);
1469 }
1470
1471
1472 void *tracked_realloc(void *ptr, size_t size, char *file, int line) {
1473         struct igheap *thisheap;
1474         void *block;
1475
1476         block = realloc(ptr, size);
1477         if (block == NULL) return(block);
1478
1479         thisheap = malloc(sizeof(struct igheap));
1480         if (thisheap == NULL) {
1481                 free(block);
1482                 return(NULL);
1483         }
1484
1485         thisheap->block = block;
1486         strcpy(thisheap->file, file);
1487         thisheap->line = line;
1488
1489         begin_critical_section(S_DEBUGMEMLEAKS);
1490         thisheap->next = igheap;
1491         igheap = thisheap;
1492         end_critical_section(S_DEBUGMEMLEAKS);
1493
1494         return(block);
1495 }
1496
1497
1498
1499 void tracked_free(void *ptr) {
1500         struct igheap *thisheap;
1501         struct igheap *trash;
1502
1503         free(ptr);
1504
1505         if (igheap == NULL) return;
1506         begin_critical_section(S_DEBUGMEMLEAKS);
1507         for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1508                 if (thisheap->next != NULL) {
1509                         if (thisheap->next->block == ptr) {
1510                                 trash = thisheap->next;
1511                                 thisheap->next = thisheap->next->next;
1512                                 free(trash);
1513                         }
1514                 }
1515         }
1516         if (igheap->block == ptr) {
1517                 trash = igheap;
1518                 igheap = igheap->next;
1519                 free(trash);
1520         }
1521         end_critical_section(S_DEBUGMEMLEAKS);
1522 }
1523
1524 char *tracked_strdup(const char *s, char *file, int line) {
1525         char *ptr;
1526
1527         if (s == NULL) return(NULL);
1528         ptr = tracked_malloc(strlen(s) + 1, file, line);
1529         if (ptr == NULL) return(NULL);
1530         strncpy(ptr, s, strlen(s));
1531         return(ptr);
1532 }
1533
1534 void dump_heap(void) {
1535         struct igheap *thisheap;
1536
1537         for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1538                 CtdlLogPrintf(CTDL_CRIT, "UNFREED: %30s : %d\n",
1539                         thisheap->file, thisheap->line);
1540         }
1541 }
1542
1543 #endif /*  DEBUG_MEMORY_LEAKS */