4 * Citadel "system dependent" stuff.
5 * See COPYING for copyright information.
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.
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.
22 #include <sys/types.h>
25 #include <sys/socket.h>
27 #include <sys/syslog.h>
29 #if TIME_WITH_SYS_TIME
30 # include <sys/time.h>
34 # include <sys/time.h>
41 #include <sys/resource.h>
42 #include <netinet/in.h>
43 #include <netinet/tcp.h>
44 #include <arpa/inet.h>
52 #include <libcitadel.h>
55 #include "sysdep_decls.h"
56 #include "citserver.h"
60 #include "housekeeping.h"
61 #include "modules/crypto/serv_crypto.h" /* Needed for init_ssl, client_write_ssl, client_read_ssl, destruct_ssl */
65 #ifdef HAVE_SYS_SELECT_H
66 #include <sys/select.h>
73 #include "ctdl_module.h"
79 #ifdef DEBUG_MEMORY_LEAKS
87 struct igheap *igheap = NULL;
91 int verbosity = DEFAULT_VERBOSITY; /* Logging level */
93 int syslog_facility = LOG_DAEMON;
94 int enable_syslog = 0;
98 * CtdlLogPrintf() ... Write logging information
100 void CtdlLogPrintf(enum LogLevel loglevel, const char *format, ...) {
102 va_start(arg_ptr, format);
103 vCtdlLogPrintf(loglevel, format, arg_ptr);
107 void vCtdlLogPrintf(enum LogLevel loglevel, const char *format, va_list arg_ptr)
109 char buf[SIZ], buf2[SIZ];
112 vsyslog((syslog_facility | loglevel), format, arg_ptr);
115 /* stderr output code */
116 if (enable_syslog || running_as_daemon) return;
118 /* if we run in forground and syslog is disabled, log to terminal */
119 if (loglevel <= verbosity) {
123 CitContext *CCC = CC;
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)) {
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,
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);
143 vsnprintf(buf2, SIZ, format, arg_ptr);
145 fprintf(stderr, "%s%s", buf, buf2);
153 * Signal handler to shut down the server.
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;
161 static RETSIGTYPE signal_cleanup(int signum) {
167 CtdlLogPrintf(CTDL_DEBUG, "Caught signal %d; shutting down.\n", signum);
168 exit_signal = signum;
175 * Some initialization stuff...
177 void init_sysdep(void) {
180 /* Avoid vulnerabilities related to FD_SETSIZE if we can. */
184 getrlimit(RLIMIT_NOFILE, &rl);
185 rl.rlim_cur = FD_SETSIZE;
186 rl.rlim_max = FD_SETSIZE;
187 setrlimit(RLIMIT_NOFILE, &rl);
191 /* If we've got OpenSSL, we're going to use it. */
197 * Set up a place to put thread-specific data.
198 * We only need a single pointer per thread - it points to the
199 * CitContext structure (in the ContextList linked list) of the
200 * session to which the calling thread is currently bound.
202 if (citthread_key_create(&MyConKey, NULL) != 0) {
203 CtdlLogPrintf(CTDL_CRIT, "Can't create TSD key: %s\n",
208 * The action for unexpected signals and exceptions should be to
209 * call signal_cleanup() to gracefully shut down the server.
212 sigaddset(&set, SIGINT);
213 sigaddset(&set, SIGQUIT);
214 sigaddset(&set, SIGHUP);
215 sigaddset(&set, SIGTERM);
216 // sigaddset(&set, SIGSEGV); commented out because
217 // sigaddset(&set, SIGILL); we want core dumps
218 // sigaddset(&set, SIGBUS);
219 sigprocmask(SIG_UNBLOCK, &set, NULL);
221 signal(SIGINT, signal_cleanup);
222 signal(SIGQUIT, signal_cleanup);
223 signal(SIGHUP, signal_cleanup);
224 signal(SIGTERM, signal_cleanup);
225 // signal(SIGSEGV, signal_cleanup); commented out because
226 // signal(SIGILL, signal_cleanup); we want core dumps
227 // signal(SIGBUS, signal_cleanup);
230 * Do not shut down the server on broken pipe signals, otherwise the
231 * whole Citadel service would come down whenever a single client
234 signal(SIGPIPE, SIG_IGN);
241 * This is a generic function to set up a master socket for listening on
242 * a TCP port. The server shuts down if the bind fails.
245 int ig_tcp_server(char *ip_addr, int port_number, int queue_len, char **errormessage)
247 struct sockaddr_in sin;
249 int actual_queue_len;
251 actual_queue_len = queue_len;
252 if (actual_queue_len < 5) actual_queue_len = 5;
254 memset(&sin, 0, sizeof(sin));
255 sin.sin_family = AF_INET;
256 sin.sin_port = htons((u_short)port_number);
257 if (ip_addr == NULL) {
258 sin.sin_addr.s_addr = INADDR_ANY;
261 sin.sin_addr.s_addr = inet_addr(ip_addr);
264 if (sin.sin_addr.s_addr == !INADDR_ANY) {
265 sin.sin_addr.s_addr = INADDR_ANY;
268 s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
271 *errormessage = (char*) malloc(SIZ + 1);
272 snprintf(*errormessage, SIZ,
273 "citserver: Can't create a socket: %s",
275 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
280 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
282 if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
283 *errormessage = (char*) malloc(SIZ + 1);
284 snprintf(*errormessage, SIZ,
285 "citserver: Can't bind: %s",
287 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
292 /* set to nonblock - we need this for some obscure situations */
293 if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
294 *errormessage = (char*) malloc(SIZ + 1);
295 snprintf(*errormessage, SIZ,
296 "citserver: Can't set socket to non-blocking: %s",
298 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
303 if (listen(s, actual_queue_len) < 0) {
304 *errormessage = (char*) malloc(SIZ + 1);
305 snprintf(*errormessage, SIZ,
306 "citserver: Can't listen: %s",
308 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
319 * Create a Unix domain socket and listen on it
321 int ig_uds_server(char *sockpath, int queue_len, char **errormessage)
323 struct sockaddr_un addr;
326 int actual_queue_len;
327 #ifdef HAVE_STRUCT_UCRED
331 actual_queue_len = queue_len;
332 if (actual_queue_len < 5) actual_queue_len = 5;
334 i = unlink(sockpath);
335 if ((i != 0) && (errno != ENOENT)) {
336 *errormessage = (char*) malloc(SIZ + 1);
337 snprintf(*errormessage, SIZ, "citserver: can't unlink %s: %s",
338 sockpath, strerror(errno));
339 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
343 memset(&addr, 0, sizeof(addr));
344 addr.sun_family = AF_UNIX;
345 safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
347 s = socket(AF_UNIX, SOCK_STREAM, 0);
349 *errormessage = (char*) malloc(SIZ + 1);
350 snprintf(*errormessage, SIZ,
351 "citserver: Can't create a socket: %s",
353 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
357 if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
358 *errormessage = (char*) malloc(SIZ + 1);
359 snprintf(*errormessage, SIZ,
360 "citserver: Can't bind: %s",
362 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
366 /* set to nonblock - we need this for some obscure situations */
367 if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
368 *errormessage = (char*) malloc(SIZ + 1);
369 snprintf(*errormessage, SIZ,
370 "citserver: Can't set socket to non-blocking: %s",
372 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
377 if (listen(s, actual_queue_len) < 0) {
378 *errormessage = (char*) malloc(SIZ + 1);
379 snprintf(*errormessage, SIZ,
380 "citserver: Can't listen: %s",
382 CtdlLogPrintf(CTDL_EMERG, "%s\n", *errormessage);
386 #ifdef HAVE_STRUCT_UCRED
387 setsockopt(s, SOL_SOCKET, SO_PASSCRED, &passcred, sizeof(passcred));
390 chmod(sockpath, S_ISGID|S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IWGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH);
397 * The following functions implement output buffering on operating systems which
398 * support it (such as Linux and various BSD flavors).
402 # define HAVE_TCP_BUFFERING
405 # define HAVE_TCP_BUFFERING
406 # define TCP_CORK TCP_NOPUSH
408 #endif /* TCP_CORK */
409 #endif /* HAVE_DARWIN */
411 static unsigned on = 1, off = 0;
413 void buffer_output(void) {
414 #ifdef HAVE_TCP_BUFFERING
416 if (!CC->redirect_ssl)
418 setsockopt(CC->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
422 void unbuffer_output(void) {
423 #ifdef HAVE_TCP_BUFFERING
425 if (!CC->redirect_ssl)
427 setsockopt(CC->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
431 void flush_output(void) {
432 #ifdef HAVE_TCP_BUFFERING
433 struct CitContext *CCC = CC;
434 setsockopt(CCC->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
435 setsockopt(CCC->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
439 static void flush_client_inbuf(void)
443 FlushStrBuf(CCC->ReadBuf);
449 * client_write() ... Send binary data to the client.
451 int client_write(const char *buf, int nbytes)
453 int bytes_written = 0;
455 #ifndef HAVE_TCP_BUFFERING
456 int old_buffer_len = 0;
462 // flush_client_inbuf();
464 if (Ctx->redirect_buffer != NULL) {
465 if ((Ctx->redirect_len + nbytes + 2) >= Ctx->redirect_alloc) {
466 Ctx->redirect_alloc = (Ctx->redirect_alloc * 2) + nbytes;
467 Ctx->redirect_buffer = realloc(Ctx->redirect_buffer,
468 Ctx->redirect_alloc);
470 memcpy(&Ctx->redirect_buffer[Ctx->redirect_len], buf, nbytes);
471 Ctx->redirect_len += nbytes;
472 Ctx->redirect_buffer[Ctx->redirect_len] = 0;
477 if (Ctx->redirect_ssl) {
478 client_write_ssl(buf, nbytes);
482 if (Ctx->client_socket == -1) return -1;
484 fdflags = fcntl(Ctx->client_socket, F_GETFL);
486 while ((bytes_written < nbytes) && (Ctx->client_socket != -1)){
487 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
489 FD_SET(Ctx->client_socket, &wset);
490 if (select(1, NULL, &wset, NULL, NULL) == -1) {
493 CtdlLogPrintf(CTDL_DEBUG, "client_write(%d bytes) select() interrupted.\n", nbytes-bytes_written);
494 if (CtdlThreadCheckStop()) {
498 /* can't trust fd's and stuff so we need to re-create them */
502 CtdlLogPrintf(CTDL_ERR,
503 "client_write(%d bytes) select failed: %s (%d)\n",
504 nbytes - bytes_written,
505 strerror(errno), errno);
513 retval = write(Ctx->client_socket, &buf[bytes_written],
514 nbytes - bytes_written);
516 CtdlLogPrintf(CTDL_ERR,
517 "client_write(%d bytes) failed: %s (%d)\n",
518 nbytes - bytes_written,
519 strerror(errno), errno);
521 // CtdlLogPrintf(CTDL_DEBUG, "Tried to send: %s", &buf[bytes_written]);
525 bytes_written = bytes_written + retval;
530 void cputbuf(const StrBuf *Buf) {
531 client_write(ChrPtr(Buf), StrLength(Buf));
536 * cprintf() Send formatted printable data to the client.
537 * Implemented in terms of client_write() so it's technically not sysdep...
539 void cprintf(const char *format, ...) {
543 va_start(arg_ptr, format);
544 if (vsnprintf(buf, sizeof buf, format, arg_ptr) == -1)
545 buf[sizeof buf - 2] = '\n';
546 client_write(buf, strlen(buf));
552 * Read data from the client socket.
554 * sock socket fd to read from
555 * buf buffer to read into
556 * bytes number of bytes to read
557 * timeout Number of seconds to wait before timing out
559 * Possible return values:
560 * 1 Requested number of bytes has been read.
561 * 0 Request timed out.
562 * -1 Connection is broken, or other error.
564 int client_read_blob(StrBuf *Target, int bytes, int timeout)
571 if (CCC->redirect_ssl) {
572 retval = client_read_sslblob(Target, bytes, timeout);
577 retval = StrBufReadBLOBBuffered(Target,
586 CtdlLogPrintf(CTDL_CRIT,
594 int client_read_to(char *buf, int bytes, int timeout)
599 rc = client_read_blob(CCC->MigrateBuf, bytes, timeout);
608 ChrPtr(CCC->MigrateBuf),
609 StrLength(CCC->MigrateBuf) + 1);
610 FlushStrBuf(CCC->MigrateBuf);
616 int HaveMoreLinesWaiting(CitContext *CCC)
618 if ((CCC->Pos == NULL) && (StrLength(CCC->ReadBuf) == 0))
626 * Read data from the client socket with default timeout.
627 * (This is implemented in terms of client_read_to() and could be
628 * justifiably moved out of sysdep.c)
630 INLINE int client_read(char *buf, int bytes)
632 return(client_read_to(buf, bytes, config.c_sleeping));
635 int CtdlClientGetLine(StrBuf *Target)
643 if (CCC->redirect_ssl) {
644 return client_readline_sslbuffer(Target,
651 rc = StrBufTCP_read_buffered_line_fast(Target,
659 if ((rc < 0) && (Error != NULL))
660 CtdlLogPrintf(CTDL_CRIT,
670 * client_getln() ... Get a LF-terminated line of text from the client.
671 * (This is implemented in terms of client_read() and could be
672 * justifiably moved out of sysdep.c)
674 int client_getln(char *buf, int bufsize)
680 retval = CtdlClientGetLine(CCC->MigrateBuf);
682 i = StrLength(CCC->MigrateBuf);
683 pCh = ChrPtr(CCC->MigrateBuf);
684 /* Strip the trailing LF, and the trailing CR if present.
689 && ( (pCh[i - 1]==13)
690 || ( pCh[i - 1]==10)) ) {
696 FlushStrBuf(CCC->MigrateBuf);
698 safestrncpy(&buf[i], "000", bufsize - i);
705 * Cleanup any contexts that are left lying around
709 void close_masters (void)
711 struct ServiceFunctionHook *serviceptr;
714 * close all protocol master sockets
716 for (serviceptr = ServiceHookTable; serviceptr != NULL;
717 serviceptr = serviceptr->next ) {
719 if (serviceptr->tcp_port > 0)
721 CtdlLogPrintf(CTDL_INFO, "Closing listener on port %d\n",
722 serviceptr->tcp_port);
723 serviceptr->tcp_port = 0;
726 if (serviceptr->sockpath != NULL)
727 CtdlLogPrintf(CTDL_INFO, "Closing listener on '%s'\n",
728 serviceptr->sockpath);
730 close(serviceptr->msock);
731 /* If it's a Unix domain socket, remove the file. */
732 if (serviceptr->sockpath != NULL) {
733 unlink(serviceptr->sockpath);
734 serviceptr->sockpath = NULL;
741 * The system-dependent part of master_cleanup() - close the master socket.
743 void sysdep_master_cleanup(void) {
752 CtdlDestroyProtoHooks();
753 CtdlDestroyDeleteHooks();
754 CtdlDestroyXmsgHooks();
755 CtdlDestroyNetprocHooks();
756 CtdlDestroyUserHooks();
757 CtdlDestroyMessageHook();
758 CtdlDestroyCleanupHooks();
759 CtdlDestroyFixedOutputHooks();
760 CtdlDestroySessionHooks();
761 CtdlDestroyServiceHook();
762 CtdlDestroyRoomHooks();
763 #ifdef HAVE_BACKTRACE
771 void graceful_shutdown(int signum) {
772 kill(current_child, signum);
773 unlink(file_pid_file);
778 int nFireUpsNonRestart = 0;
782 * Start running as a daemon.
784 void start_daemon(int unused) {
792 /* Close stdin/stdout/stderr and replace them with /dev/null.
793 * We don't just call close() because we don't want these fd's
794 * to be reused for other files.
796 if (chdir(ctdl_run_dir) != 0)
797 CtdlLogPrintf(CTDL_EMERG,
798 "unable to change into directory [%s]: %s",
799 ctdl_run_dir, strerror(errno));
806 signal(SIGHUP, SIG_IGN);
807 signal(SIGINT, SIG_IGN);
808 signal(SIGQUIT, SIG_IGN);
812 if ((freopen("/dev/null", "r", stdin) != stdin) ||
813 (freopen("/dev/null", "w", stdout) != stdout) ||
814 (freopen("/dev/null", "w", stderr) != stderr))
815 CtdlLogPrintf(CTDL_EMERG,
816 "unable to reopen stdin/out/err %s",
821 current_child = fork();
823 signal(SIGTERM, graceful_shutdown);
825 if (current_child < 0) {
830 else if (current_child == 0) {
831 return; /* continue starting citadel. */
835 fp = fopen(file_pid_file, "w");
837 fprintf(fp, ""F_PID_T"\n", getpid());
840 waitpid(current_child, &status, 0);
843 nFireUpsNonRestart = nFireUps;
845 /* Exit code 0 means the watcher should exit */
846 if (WIFEXITED(status) && (WEXITSTATUS(status) == CTDLEXIT_SHUTDOWN)) {
850 /* Exit code 101-109 means the watcher should exit */
851 else if (WIFEXITED(status) && (WEXITSTATUS(status) >= 101) && (WEXITSTATUS(status) <= 109)) {
855 /* Any other exit code, or no exit code, means we should restart. */
859 ForkedPid = current_child;
862 } while (do_restart);
864 unlink(file_pid_file);
865 exit(WEXITSTATUS(status));
870 void checkcrash(void)
872 if (nFireUpsNonRestart != nFireUps)
876 CrashMail = NewStrBuf();
877 CtdlLogPrintf(CTDL_ALERT, "Posting crash message\n");
878 StrBufPrintf(CrashMail,
880 " The Citadel server process (citserver) terminated unexpectedly."
882 " This could be the result of a bug in the server program, or some external "
884 " You can obtain more information about this by enabling core dumps.\n \n"
885 " For more information, please see:\n \n"
886 " http://citadel.org/doku.php/faq:mastering_your_os:gdb#how.do.i.make.my.system.produce.core-files"
889 " If you have already done this, the core dump is likely to be found at %score.%d\n"
891 ctdl_run_dir, ForkedPid);
892 CtdlAideMessage(ChrPtr(CrashMail), "Citadel server process terminated unexpectedly");
893 FreeStrBuf(&CrashMail);
899 * Generic routine to convert a login name to a full name (gecos)
900 * Returns nonzero if a conversion took place
902 int convert_login(char NameToConvert[]) {
906 pw = getpwnam(NameToConvert);
911 strcpy(NameToConvert, pw->pw_gecos);
912 for (a=0; a<strlen(NameToConvert); ++a) {
913 if (NameToConvert[a] == ',') NameToConvert[a] = 0;
922 * This loop just keeps going and going and going...
926 * This current implimentation of worker_thread creates a bottle neck in several situations
927 * The first thing to remember is that a single thread can handle more than one connection at a time.
928 * More threads mean less memory for the system to run in.
929 * So for efficiency we want every thread to be doing something useful or waiting in the main loop for
930 * something to happen anywhere.
931 * This current implimentation requires worker threads to wait in other locations, after it has
932 * been committed to a single connection which is very wasteful.
933 * As an extreme case consider this:
934 * A slow client connects and this slow client sends only one character each second.
935 * With this current implimentation a single worker thread is dispatched to handle that connection
936 * until such times as the client timeout expires, an error occurs on the socket or the client
937 * completes its transmission.
938 * THIS IS VERY BAD since that thread could have handled a read from many more clients in each one
939 * second interval between chars.
941 * It is my intention to re-write this code and the associated client_getln, client_read functions
942 * to allow any thread to read data on behalf of any connection (context).
943 * To do this I intend to have this main loop read chars into a buffer stored in the context.
944 * Once the correct criteria for a full buffer is met then we will dispatch a thread to
946 * This worker thread loop also needs to be able to handle binary data.
949 void *worker_thread(void *arg) {
952 CitContext *bind_me = NULL;
959 while (!CtdlThreadCheckStop()) {
961 /* make doubly sure we're not holding any stale db handles
962 * which might cause a deadlock.
965 do_select: force_purge = 0;
966 bind_me = NULL; /* Which session shall we handle? */
968 /* Initialize the fdset. */
972 begin_critical_section(S_SESSION_TABLE);
973 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
974 /* Dont select on dead sessions only truly idle ones */
975 if ((ptr->state == CON_IDLE) &&
976 (CC->kill_me == 0) &&
977 (ptr->client_socket != -1))
979 FD_SET(ptr->client_socket, &readfds);
980 if (ptr->client_socket > highest)
981 highest = ptr->client_socket;
983 if ((bind_me == NULL) && (ptr->state == CON_READY)) {
985 ptr->state = CON_EXECUTING;
988 if ((bind_me == NULL) && (ptr->state == CON_GREETING)) {
990 ptr->state = CON_STARTING;
994 end_critical_section(S_SESSION_TABLE);
1000 /* If we got this far, it means that there are no sessions
1001 * which a previous thread marked for attention, so we go
1002 * ahead and get ready to select().
1005 if (!CtdlThreadCheckStop()) {
1006 tv.tv_sec = 1; /* wake up every second if no input */
1008 retval = CtdlThreadSelect(highest + 1, &readfds, NULL, NULL, &tv);
1013 /* Now figure out who made this select() unblock.
1014 * First, check for an error or exit condition.
1017 if (errno == EBADF) {
1018 CtdlLogPrintf(CTDL_NOTICE, "select() failed: (%s)\n",
1022 if (errno != EINTR) {
1023 CtdlLogPrintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
1024 CtdlThreadStopAll();
1027 CtdlLogPrintf(CTDL_DEBUG, "Interrupted CtdlThreadSelect.\n");
1028 if (CtdlThreadCheckStop()) return(NULL);
1032 else if(retval == 0) {
1033 if (CtdlThreadCheckStop()) return(NULL);
1036 /* It must be a client socket. Find a context that has data
1037 * waiting on its socket *and* is in the CON_IDLE state. Any
1038 * active sockets other than our chosen one are marked as
1039 * CON_READY so the next thread that comes around can just bind
1040 * to one without having to select() again.
1042 begin_critical_section(S_SESSION_TABLE);
1043 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1044 if ( (FD_ISSET(ptr->client_socket, &readfds))
1045 && (ptr->state == CON_IDLE) ) {
1046 ptr->input_waiting = 1;
1048 bind_me = ptr; /* I choose you! */
1049 bind_me->state = CON_EXECUTING;
1052 ptr->state = CON_READY;
1056 end_critical_section(S_SESSION_TABLE);
1059 /* We're bound to a session */
1060 if (bind_me != NULL) {
1061 become_session(bind_me);
1063 if (bind_me->state == CON_STARTING) {
1064 bind_me->state = CON_EXECUTING;
1065 begin_session(bind_me);
1066 bind_me->h_greeting_function();
1068 /* If the client has sent a command, execute it. */
1069 if (CC->input_waiting) {
1070 CC->h_command_function();
1072 while (HaveMoreLinesWaiting(CC))
1073 CC->h_command_function();
1075 CC->input_waiting = 0;
1078 /* If there are asynchronous messages waiting and the
1079 * client supports it, do those now */
1080 if ((CC->is_async) && (CC->async_waiting)
1081 && (CC->h_async_function != NULL)) {
1082 CC->h_async_function();
1083 CC->async_waiting = 0;
1086 force_purge = CC->kill_me;
1087 become_session(NULL);
1088 bind_me->state = CON_IDLE;
1091 dead_session_purge(force_purge);
1094 /* If control reaches this point, the server is shutting down */
1102 * A function to handle selecting on master sockets.
1103 * In other words it handles new connections.
1106 void *select_on_master (void *arg)
1108 struct ServiceFunctionHook *serviceptr;
1112 int ssock; /* Descriptor for client socket */
1113 CitContext *con= NULL; /* Temporary context pointer */
1118 while (!CtdlThreadCheckStop()) {
1119 /* Initialize the fdset. */
1120 FD_ZERO(&master_fds);
1123 /* First, add the various master sockets to the fdset. */
1124 for (serviceptr = ServiceHookTable; serviceptr != NULL;
1125 serviceptr = serviceptr->next ) {
1126 m = serviceptr->msock;
1127 FD_SET(m, &master_fds);
1133 if (!CtdlThreadCheckStop()) {
1134 tv.tv_sec = 60; /* wake up every second if no input */
1136 retval = CtdlThreadSelect(highest + 1, &master_fds, NULL, NULL, &tv);
1141 /* Now figure out who made this select() unblock.
1142 * First, check for an error or exit condition.
1145 if (errno == EBADF) {
1146 CtdlLogPrintf(CTDL_NOTICE, "select() failed: (%s)\n",
1150 if (errno != EINTR) {
1151 CtdlLogPrintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
1152 CtdlThreadStopAll();
1154 CtdlLogPrintf(CTDL_DEBUG, "Interrupted CtdlThreadSelect.\n");
1155 if (CtdlThreadCheckStop()) return(NULL);
1159 else if(retval == 0) {
1160 if (CtdlThreadCheckStop()) return(NULL);
1163 /* Next, check to see if it's a new client connecting
1164 * on a master socket.
1166 else for (serviceptr = ServiceHookTable; serviceptr != NULL;
1167 serviceptr = serviceptr->next ) {
1169 if (FD_ISSET(serviceptr->msock, &master_fds)) {
1170 ssock = accept(serviceptr->msock, NULL, 0);
1172 CtdlLogPrintf(CTDL_DEBUG,
1173 "New client socket %d\n",
1176 /* The master socket is non-blocking but the client
1177 * sockets need to be blocking, otherwise certain
1178 * operations barf on FreeBSD. Not a fatal error.
1180 if (fcntl(ssock, F_SETFL, 0) < 0) {
1181 CtdlLogPrintf(CTDL_EMERG,
1182 "citserver: Can't set socket to blocking: %s\n",
1186 /* New context will be created already
1187 * set up in the CON_EXECUTING state.
1189 con = CreateNewContext();
1191 /* Assign our new socket number to it. */
1192 con->client_socket = ssock;
1193 con->h_command_function =
1194 serviceptr->h_command_function;
1195 con->h_async_function =
1196 serviceptr->h_async_function;
1197 con->h_greeting_function = serviceptr->h_greeting_function;
1199 serviceptr->ServiceName;
1201 /* Determine whether it's a local socket */
1202 if (serviceptr->sockpath != NULL)
1203 con->is_local_socket = 1;
1205 /* Set the SO_REUSEADDR socket option */
1207 setsockopt(ssock, SOL_SOCKET,
1211 con->state = CON_GREETING;
1227 * Translate text facility name to syslog.h defined value.
1229 int SyslogFacility(char *name)
1238 { LOG_KERN, "kern" },
1239 { LOG_USER, "user" },
1240 { LOG_MAIL, "mail" },
1241 { LOG_DAEMON, "daemon" },
1242 { LOG_AUTH, "auth" },
1243 { LOG_SYSLOG, "syslog" },
1245 { LOG_NEWS, "news" },
1246 { LOG_UUCP, "uucp" },
1247 { LOG_LOCAL0, "local0" },
1248 { LOG_LOCAL1, "local1" },
1249 { LOG_LOCAL2, "local2" },
1250 { LOG_LOCAL3, "local3" },
1251 { LOG_LOCAL4, "local4" },
1252 { LOG_LOCAL5, "local5" },
1253 { LOG_LOCAL6, "local6" },
1254 { LOG_LOCAL7, "local7" },
1257 for(i = 0; facTbl[i].name != NULL; i++) {
1258 if(!strcasecmp(name, facTbl[i].name))
1259 return facTbl[i].facility;
1266 /********** MEM CHEQQER ***********/
1268 #ifdef DEBUG_MEMORY_LEAKS
1275 void *tracked_malloc(size_t size, char *file, int line) {
1276 struct igheap *thisheap;
1279 block = malloc(size);
1280 if (block == NULL) return(block);
1282 thisheap = malloc(sizeof(struct igheap));
1283 if (thisheap == NULL) {
1288 thisheap->block = block;
1289 strcpy(thisheap->file, file);
1290 thisheap->line = line;
1292 begin_critical_section(S_DEBUGMEMLEAKS);
1293 thisheap->next = igheap;
1295 end_critical_section(S_DEBUGMEMLEAKS);
1301 void *tracked_realloc(void *ptr, size_t size, char *file, int line) {
1302 struct igheap *thisheap;
1305 block = realloc(ptr, size);
1306 if (block == NULL) return(block);
1308 thisheap = malloc(sizeof(struct igheap));
1309 if (thisheap == NULL) {
1314 thisheap->block = block;
1315 strcpy(thisheap->file, file);
1316 thisheap->line = line;
1318 begin_critical_section(S_DEBUGMEMLEAKS);
1319 thisheap->next = igheap;
1321 end_critical_section(S_DEBUGMEMLEAKS);
1328 void tracked_free(void *ptr) {
1329 struct igheap *thisheap;
1330 struct igheap *trash;
1334 if (igheap == NULL) return;
1335 begin_critical_section(S_DEBUGMEMLEAKS);
1336 for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1337 if (thisheap->next != NULL) {
1338 if (thisheap->next->block == ptr) {
1339 trash = thisheap->next;
1340 thisheap->next = thisheap->next->next;
1345 if (igheap->block == ptr) {
1347 igheap = igheap->next;
1350 end_critical_section(S_DEBUGMEMLEAKS);
1353 char *tracked_strdup(const char *s, char *file, int line) {
1356 if (s == NULL) return(NULL);
1357 ptr = tracked_malloc(strlen(s) + 1, file, line);
1358 if (ptr == NULL) return(NULL);
1359 strncpy(ptr, s, strlen(s));
1363 void dump_heap(void) {
1364 struct igheap *thisheap;
1366 for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1367 CtdlLogPrintf(CTDL_CRIT, "UNFREED: %30s : %d\n",
1368 thisheap->file, thisheap->line);
1372 #endif /* DEBUG_MEMORY_LEAKS */