4 * Citadel "system dependent" stuff.
5 * See copyright.txt 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>
26 #include <sys/syslog.h>
28 #if TIME_WITH_SYS_TIME
29 # include <sys/time.h>
33 # include <sys/time.h>
40 #include <sys/resource.h>
41 #include <netinet/in.h>
42 #include <netinet/tcp.h>
43 #include <arpa/inet.h>
56 #include "serv_extensions.h"
57 #include "sysdep_decls.h"
58 #include "citserver.h"
62 #include "housekeeping.h"
64 #include "serv_crypto.h"
65 #include "serv_fulltext.h"
67 #ifdef HAVE_SYS_SELECT_H
68 #include <sys/select.h>
76 #ifdef DEBUG_MEMORY_LEAKS
84 struct igheap *igheap = NULL;
88 pthread_mutex_t Critters[MAX_SEMAPHORES]; /* Things needing locking */
89 pthread_key_t MyConKey; /* TSD key for MyContext() */
91 int verbosity = DEFAULT_VERBOSITY; /* Logging level */
93 struct CitContext masterCC;
94 time_t last_purge = 0; /* Last dead session purge */
95 static int num_threads = 0; /* Current number of threads */
96 int num_sessions = 0; /* Current number of sessions */
97 pthread_t indexer_thread_tid;
98 pthread_t checkpoint_thread_tid;
100 int syslog_facility = LOG_DAEMON;
101 int enable_syslog = 0;
102 extern int running_as_daemon;
105 * lprintf() ... Write logging information
107 void lprintf(enum LogLevel loglevel, const char *format, ...) {
111 va_start(arg_ptr, format);
112 vsyslog((syslog_facility | loglevel), format, arg_ptr);
116 /* stderr output code */
117 if (enable_syslog || running_as_daemon) return;
119 /* if we run in forground and syslog is disabled, log to terminal */
120 if (loglevel <= verbosity) {
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 (CC->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 va_start(arg_ptr, format);
144 vfprintf(stderr, format, arg_ptr);
153 * Signal handler to shut down the server.
156 volatile int time_to_die = 0;
158 static RETSIGTYPE signal_cleanup(int signum) {
159 lprintf(CTDL_DEBUG, "Caught signal %d; shutting down.\n", signum);
161 master_cleanup(signum);
166 * Some initialization stuff...
168 void init_sysdep(void) {
172 /* Avoid vulnerabilities related to FD_SETSIZE if we can. */
176 getrlimit(RLIMIT_NOFILE, &rl);
177 rl.rlim_cur = FD_SETSIZE;
178 rl.rlim_max = FD_SETSIZE;
179 setrlimit(RLIMIT_NOFILE, &rl);
183 /* If we've got OpenSSL, we're going to use it. */
188 /* Set up a bunch of semaphores to be used for critical sections */
189 for (i=0; i<MAX_SEMAPHORES; ++i) {
190 pthread_mutex_init(&Critters[i], NULL);
194 * Set up a place to put thread-specific data.
195 * We only need a single pointer per thread - it points to the
196 * CitContext structure (in the ContextList linked list) of the
197 * session to which the calling thread is currently bound.
199 if (pthread_key_create(&MyConKey, NULL) != 0) {
200 lprintf(CTDL_CRIT, "Can't create TSD key: %s\n",
205 * The action for unexpected signals and exceptions should be to
206 * call signal_cleanup() to gracefully shut down the server.
209 sigaddset(&set, SIGINT);
210 sigaddset(&set, SIGQUIT);
211 sigaddset(&set, SIGHUP);
212 sigaddset(&set, SIGTERM);
213 // sigaddset(&set, SIGSEGV); commented out because
214 // sigaddset(&set, SIGILL); we want core dumps
215 // sigaddset(&set, SIGBUS);
216 sigprocmask(SIG_UNBLOCK, &set, NULL);
218 signal(SIGINT, signal_cleanup);
219 signal(SIGQUIT, signal_cleanup);
220 signal(SIGHUP, signal_cleanup);
221 signal(SIGTERM, signal_cleanup);
222 // signal(SIGSEGV, signal_cleanup); commented out because
223 // signal(SIGILL, signal_cleanup); we want core dumps
224 // signal(SIGBUS, signal_cleanup);
227 * Do not shut down the server on broken pipe signals, otherwise the
228 * whole Citadel service would come down whenever a single client
231 signal(SIGPIPE, SIG_IGN);
236 * Obtain a semaphore lock to begin a critical section.
238 void begin_critical_section(int which_one)
240 /* lprintf(CTDL_DEBUG, "begin_critical_section(%d)\n", which_one); */
242 /* For all types of critical sections except those listed here,
243 * ensure nobody ever tries to do a critical section within a
244 * transaction; this could lead to deadlock.
246 if ( (which_one != S_FLOORCACHE)
247 #ifdef DEBUG_MEMORY_LEAKS
248 && (which_one != S_DEBUGMEMLEAKS)
253 pthread_mutex_lock(&Critters[which_one]);
257 * Release a semaphore lock to end a critical section.
259 void end_critical_section(int which_one)
261 pthread_mutex_unlock(&Critters[which_one]);
267 * This is a generic function to set up a master socket for listening on
268 * a TCP port. The server shuts down if the bind fails.
271 int ig_tcp_server(char *ip_addr, int port_number, int queue_len)
273 struct sockaddr_in sin;
275 int actual_queue_len;
277 actual_queue_len = queue_len;
278 if (actual_queue_len < 5) actual_queue_len = 5;
280 memset(&sin, 0, sizeof(sin));
281 sin.sin_family = AF_INET;
282 sin.sin_port = htons((u_short)port_number);
283 if (ip_addr == NULL) {
284 sin.sin_addr.s_addr = INADDR_ANY;
287 sin.sin_addr.s_addr = inet_addr(ip_addr);
290 if (sin.sin_addr.s_addr == INADDR_NONE) {
291 sin.sin_addr.s_addr = INADDR_ANY;
294 s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
297 lprintf(CTDL_EMERG, "citserver: Can't create a socket: %s\n",
303 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
305 if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
306 lprintf(CTDL_EMERG, "citserver: Can't bind: %s\n",
312 /* set to nonblock - we need this for some obscure situations */
313 if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
315 "citserver: Can't set socket to non-blocking: %s\n",
321 if (listen(s, actual_queue_len) < 0) {
322 lprintf(CTDL_EMERG, "citserver: Can't listen: %s\n",
334 * Create a Unix domain socket and listen on it
336 int ig_uds_server(char *sockpath, int queue_len)
338 struct sockaddr_un addr;
341 int actual_queue_len;
343 actual_queue_len = queue_len;
344 if (actual_queue_len < 5) actual_queue_len = 5;
346 i = unlink(sockpath);
347 if (i != 0) if (errno != ENOENT) {
348 lprintf(CTDL_EMERG, "citserver: can't unlink %s: %s\n",
349 sockpath, strerror(errno));
353 memset(&addr, 0, sizeof(addr));
354 addr.sun_family = AF_UNIX;
355 safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
357 s = socket(AF_UNIX, SOCK_STREAM, 0);
359 lprintf(CTDL_EMERG, "citserver: Can't create a socket: %s\n",
364 if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
365 lprintf(CTDL_EMERG, "citserver: Can't bind: %s\n",
370 /* set to nonblock - we need this for some obscure situations */
371 if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
373 "citserver: Can't set socket to non-blocking: %s\n",
379 if (listen(s, actual_queue_len) < 0) {
380 lprintf(CTDL_EMERG, "citserver: Can't listen: %s\n",
385 chmod(sockpath, 0777);
392 * Return a pointer to the CitContext structure bound to the thread which
393 * called this function. If there's no such binding (for example, if it's
394 * called by the housekeeper thread) then a generic 'master' CC is returned.
396 * This function is used *VERY* frequently and must be kept small.
398 struct CitContext *MyContext(void) {
400 register struct CitContext *c;
402 return ((c = (struct CitContext *) pthread_getspecific(MyConKey),
403 c == NULL) ? &masterCC : c
409 * Initialize a new context and place it in the list. The session number
410 * used to be the PID (which is why it's called cs_pid), but that was when we
411 * had one process per session. Now we just assign them sequentially, starting
412 * at 1 (don't change it to 0 because masterCC uses 0).
414 struct CitContext *CreateNewContext(void) {
415 struct CitContext *me;
416 static int next_pid = 0;
418 me = (struct CitContext *) malloc(sizeof(struct CitContext));
420 lprintf(CTDL_ALERT, "citserver: can't allocate memory!!\n");
423 memset(me, 0, sizeof(struct CitContext));
425 /* The new context will be created already in the CON_EXECUTING state
426 * in order to prevent another thread from grabbing it while it's
429 me->state = CON_EXECUTING;
432 * Generate a unique session number and insert this context into
435 begin_critical_section(S_SESSION_TABLE);
436 me->cs_pid = ++next_pid;
438 me->next = ContextList;
440 if (me->next != NULL) {
444 end_critical_section(S_SESSION_TABLE);
450 * The following functions implement output buffering. If the kernel supplies
451 * native TCP buffering (Linux & *BSD), use that; otherwise, emulate it with
452 * user-space buffering.
455 # define HAVE_TCP_BUFFERING
458 # define HAVE_TCP_BUFFERING
459 # define TCP_CORK TCP_NOPUSH
464 #ifdef HAVE_TCP_BUFFERING
465 static unsigned on = 1, off = 0;
466 void buffer_output(void) {
467 struct CitContext *ctx = MyContext();
468 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
472 void unbuffer_output(void) {
473 struct CitContext *ctx = MyContext();
474 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
478 void flush_output(void) {
479 struct CitContext *ctx = MyContext();
480 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
481 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
484 void buffer_output(void) {
485 if (CC->buffering == 0) {
488 CC->output_buffer = malloc(SIZ);
492 void flush_output(void) {
493 if (CC->buffering == 1) {
494 client_write(CC->output_buffer, CC->buffer_len);
499 void unbuffer_output(void) {
500 if (CC->buffering == 1) {
502 /* We don't call flush_output because we can't. */
503 client_write(CC->output_buffer, CC->buffer_len);
505 free(CC->output_buffer);
506 CC->output_buffer = NULL;
514 * client_write() ... Send binary data to the client.
516 void client_write(char *buf, int nbytes)
518 int bytes_written = 0;
520 #ifndef HAVE_TCP_BUFFERING
521 int old_buffer_len = 0;
524 if (CC->redirect_buffer != NULL) {
525 if ((CC->redirect_len + nbytes + 2) >= CC->redirect_alloc) {
526 CC->redirect_alloc = (CC->redirect_alloc * 2) + nbytes;
527 CC->redirect_buffer = realloc(CC->redirect_buffer,
530 memcpy(&CC->redirect_buffer[CC->redirect_len], buf, nbytes);
531 CC->redirect_len += nbytes;
532 CC->redirect_buffer[CC->redirect_len] = 0;
536 #ifndef HAVE_TCP_BUFFERING
537 /* If we're buffering for later, do that now. */
539 old_buffer_len = CC->buffer_len;
540 CC->buffer_len += nbytes;
541 CC->output_buffer = realloc(CC->output_buffer, CC->buffer_len);
542 memcpy(&CC->output_buffer[old_buffer_len], buf, nbytes);
547 /* Ok, at this point we're not buffering. Go ahead and write. */
550 if (CC->redirect_ssl) {
551 client_write_ssl(buf, nbytes);
556 while (bytes_written < nbytes) {
557 retval = write(CC->client_socket, &buf[bytes_written],
558 nbytes - bytes_written);
561 "client_write(%d bytes) failed: %s (%d)\n",
562 nbytes - bytes_written,
563 strerror(errno), errno);
567 bytes_written = bytes_written + retval;
573 * cprintf() ... Send formatted printable data to the client. It is
574 * implemented in terms of client_write() but remains in
575 * sysdep.c in case we port to somewhere without va_args...
577 void cprintf(const char *format, ...) {
581 va_start(arg_ptr, format);
582 if (vsnprintf(buf, sizeof buf, format, arg_ptr) == -1)
583 buf[sizeof buf - 2] = '\n';
584 client_write(buf, strlen(buf));
590 * Read data from the client socket.
592 * 1 Requested number of bytes has been read.
593 * 0 Request timed out.
594 * -1 The socket is broken.
595 * If the socket breaks, the session will be terminated.
597 int client_read_to(char *buf, int bytes, int timeout)
605 if (CC->redirect_ssl) {
606 return (client_read_ssl(buf, bytes, timeout));
612 FD_SET(CC->client_socket, &rfds);
616 retval = select( (CC->client_socket)+1,
617 &rfds, NULL, NULL, &tv);
619 if (FD_ISSET(CC->client_socket, &rfds) == 0) {
623 rlen = read(CC->client_socket, &buf[len], bytes-len);
625 /* The socket has been disconnected! */
635 * Read data from the client socket with default timeout.
636 * (This is implemented in terms of client_read_to() and could be
637 * justifiably moved out of sysdep.c)
639 INLINE int client_read(char *buf, int bytes)
641 return(client_read_to(buf, bytes, config.c_sleeping));
646 * client_getln() ... Get a LF-terminated line of text from the client.
647 * (This is implemented in terms of client_read() and could be
648 * justifiably moved out of sysdep.c)
650 int client_getln(char *buf, int bufsize)
654 /* Read one character at a time.
657 retval = client_read(&buf[i], 1);
658 if (retval != 1 || buf[i] == '\n' || i == (bufsize-1))
662 /* If we got a long line, discard characters until the newline.
664 if (i == (bufsize-1))
665 while (buf[i] != '\n' && retval == 1)
666 retval = client_read(&buf[i], 1);
668 /* Strip the trailing LF, and the trailing CR if present.
671 while ( (strlen(buf) > 0) && ((buf[strlen(buf)-1]==10) || (buf[strlen(buf)-1] == 13)) ) {
672 buf[strlen(buf)-1] = 0;
674 if (retval < 0) safestrncpy(buf, "000", bufsize);
681 * The system-dependent part of master_cleanup() - close the master socket.
683 void sysdep_master_cleanup(void) {
684 struct ServiceFunctionHook *serviceptr;
687 * close all protocol master sockets
689 for (serviceptr = ServiceHookTable; serviceptr != NULL;
690 serviceptr = serviceptr->next ) {
692 if (serviceptr->tcp_port > 0)
693 lprintf(CTDL_INFO, "Closing listener on port %d\n",
694 serviceptr->tcp_port);
696 if (serviceptr->sockpath != NULL)
697 lprintf(CTDL_INFO, "Closing listener on '%s'\n",
698 serviceptr->sockpath);
700 close(serviceptr->msock);
702 /* If it's a Unix domain socket, remove the file. */
703 if (serviceptr->sockpath != NULL) {
704 unlink(serviceptr->sockpath);
711 * Terminate another session.
712 * (This could justifiably be moved out of sysdep.c because it
713 * no longer does anything that is system-dependent.)
715 void kill_session(int session_to_kill) {
716 struct CitContext *ptr;
718 begin_critical_section(S_SESSION_TABLE);
719 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
720 if (ptr->cs_pid == session_to_kill) {
724 end_critical_section(S_SESSION_TABLE);
731 * Start running as a daemon.
733 void start_daemon(int unused) {
734 close(0); close(1); close(2);
737 signal(SIGHUP,SIG_IGN);
738 signal(SIGINT,SIG_IGN);
739 signal(SIGQUIT,SIG_IGN);
745 * Generic routine to convert a login name to a full name (gecos)
746 * Returns nonzero if a conversion took place
748 int convert_login(char NameToConvert[]) {
752 pw = getpwnam(NameToConvert);
757 strcpy(NameToConvert, pw->pw_gecos);
758 for (a=0; a<strlen(NameToConvert); ++a) {
759 if (NameToConvert[a] == ',') NameToConvert[a] = 0;
765 struct worker_node *worker_list = NULL;
769 * create a worker thread. this function must always be called from within
770 * an S_WORKER_LIST critical section!
772 void create_worker(void) {
774 struct worker_node *n;
777 n = malloc(sizeof(struct worker_node));
779 lprintf(CTDL_EMERG, "can't allocate worker_node, exiting\n");
784 if ((ret = pthread_attr_init(&attr))) {
785 lprintf(CTDL_EMERG, "pthread_attr_init: %s\n", strerror(ret));
790 /* Our per-thread stacks need to be bigger than the default size,
791 * otherwise the MIME parser crashes on FreeBSD, and the IMAP service
792 * crashes on 64-bit Linux.
794 if ((ret = pthread_attr_setstacksize(&attr, THREADSTACKSIZE))) {
795 lprintf(CTDL_EMERG, "pthread_attr_setstacksize: %s\n",
798 pthread_attr_destroy(&attr);
802 if ((ret = pthread_create(&n->tid, &attr, worker_thread, NULL) != 0))
805 lprintf(CTDL_ALERT, "Can't create worker thread: %s\n",
809 n->next = worker_list;
811 pthread_attr_destroy(&attr);
816 * Create the indexer thread and begin its operation.
817 * Then create the checkpoint thread and begin its operation.
819 void create_maintenance_threads(void) {
823 if ((ret = pthread_attr_init(&attr))) {
824 lprintf(CTDL_EMERG, "pthread_attr_init: %s\n", strerror(ret));
829 /* Our per-thread stacks need to be bigger than the default size,
830 * otherwise the MIME parser crashes on FreeBSD, and the IMAP service
831 * crashes on 64-bit Linux.
833 if ((ret = pthread_attr_setstacksize(&attr, THREADSTACKSIZE))) {
834 lprintf(CTDL_EMERG, "pthread_attr_setstacksize: %s\n",
837 pthread_attr_destroy(&attr);
841 if ((ret = pthread_create(&indexer_thread_tid, &attr, indexer_thread, NULL) != 0)) {
842 lprintf(CTDL_ALERT, "Can't create thread: %s\n", strerror(ret));
845 if ((ret = pthread_create(&checkpoint_thread_tid, &attr, checkpoint_thread, NULL) != 0)) {
846 lprintf(CTDL_ALERT, "Can't create thread: %s\n", strerror(ret));
849 pthread_attr_destroy(&attr);
855 * Purge all sessions which have the 'kill_me' flag set.
856 * This function has code to prevent it from running more than once every
857 * few seconds, because running it after every single unbind would waste a lot
858 * of CPU time and keep the context list locked too much. To force it to run
859 * anyway, set "force" to nonzero.
862 * After that's done, we raise the size of the worker thread pool
863 * if such an action is appropriate.
865 void dead_session_purge(int force) {
866 struct CitContext *ptr; /* general-purpose utility pointer */
867 struct CitContext *rem = NULL; /* list of sessions to be destroyed */
870 if ( (time(NULL) - last_purge) < 5 ) {
871 return; /* Too soon, go away */
876 begin_critical_section(S_SESSION_TABLE);
877 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
878 if ( (ptr->state == CON_IDLE) && (ptr->kill_me) ) {
880 /* Remove the session from the active list */
882 ptr->prev->next = ptr->next;
885 ContextList = ptr->next;
888 ptr->next->prev = ptr->prev;
893 /* And put it on our to-be-destroyed list */
899 end_critical_section(S_SESSION_TABLE);
901 /* Now that we no longer have the session list locked, we can take
902 * our time and destroy any sessions on the to-be-killed list, which
903 * is allocated privately on this thread's stack.
905 while (rem != NULL) {
906 lprintf(CTDL_DEBUG, "Purging session %d\n", rem->cs_pid);
913 /* Raise the size of the worker thread pool if necessary. */
914 if ( (num_sessions > num_threads)
915 && (num_threads < config.c_max_workers) ) {
916 begin_critical_section(S_WORKER_LIST);
918 end_critical_section(S_WORKER_LIST);
927 * masterCC is the context we use when not attached to a session. This
928 * function initializes it.
930 void InitializeMasterCC(void) {
931 memset(&masterCC, 0, sizeof(struct CitContext));
932 masterCC.internal_pgm = 1;
942 * Bind a thread to a context. (It's inline merely to speed things up.)
944 INLINE void become_session(struct CitContext *which_con) {
945 pthread_setspecific(MyConKey, (void *)which_con );
951 * This loop just keeps going and going and going...
953 void *worker_thread(void *arg) {
956 struct CitContext *ptr;
957 struct CitContext *bind_me = NULL;
960 struct CitContext *con= NULL; /* Temporary context pointer */
961 struct ServiceFunctionHook *serviceptr;
962 int ssock; /* Descriptor for client socket */
971 while (!time_to_die) {
973 /* make doubly sure we're not holding any stale db handles
974 * which might cause a deadlock.
977 do_select: force_purge = 0;
978 bind_me = NULL; /* Which session shall we handle? */
980 /* Initialize the fdset. */
984 begin_critical_section(S_SESSION_TABLE);
985 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
986 if (ptr->state == CON_IDLE) {
987 FD_SET(ptr->client_socket, &readfds);
988 if (ptr->client_socket > highest)
989 highest = ptr->client_socket;
991 if ((bind_me == NULL) && (ptr->state == CON_READY)) {
993 ptr->state = CON_EXECUTING;
996 end_critical_section(S_SESSION_TABLE);
1002 /* If we got this far, it means that there are no sessions
1003 * which a previous thread marked for attention, so we go
1004 * ahead and get ready to select().
1007 /* First, add the various master sockets to the fdset. */
1008 for (serviceptr = ServiceHookTable; serviceptr != NULL;
1009 serviceptr = serviceptr->next ) {
1010 m = serviceptr->msock;
1011 FD_SET(m, &readfds);
1018 tv.tv_sec = 1; /* wake up every second if no input */
1020 retval = select(highest + 1, &readfds, NULL, NULL, &tv);
1023 if (time_to_die) return(NULL);
1025 /* Now figure out who made this select() unblock.
1026 * First, check for an error or exit condition.
1029 if (errno == EBADF) {
1030 lprintf(CTDL_NOTICE, "select() failed: (%s)\n",
1034 if (errno != EINTR) {
1035 lprintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
1037 } else if (!time_to_die)
1041 /* Next, check to see if it's a new client connecting
1042 * on a master socket.
1044 else for (serviceptr = ServiceHookTable; serviceptr != NULL;
1045 serviceptr = serviceptr->next ) {
1047 if (FD_ISSET(serviceptr->msock, &readfds)) {
1048 ssock = accept(serviceptr->msock, NULL, 0);
1051 "New client socket %d\n",
1054 /* The master socket is non-blocking but the client
1055 * sockets need to be blocking, otherwise certain
1056 * operations barf on FreeBSD. Not a fatal error.
1058 if (fcntl(ssock, F_SETFL, 0) < 0) {
1060 "citserver: Can't set socket to blocking: %s\n",
1064 /* New context will be created already
1065 * set up in the CON_EXECUTING state.
1067 con = CreateNewContext();
1069 /* Assign our new socket number to it. */
1070 con->client_socket = ssock;
1071 con->h_command_function =
1072 serviceptr->h_command_function;
1073 con->h_async_function =
1074 serviceptr->h_async_function;
1076 /* Determine whether it's a local socket */
1077 if (serviceptr->sockpath != NULL)
1078 con->is_local_socket = 1;
1080 /* Set the SO_REUSEADDR socket option */
1082 setsockopt(ssock, SOL_SOCKET,
1086 become_session(con);
1088 serviceptr->h_greeting_function();
1089 become_session(NULL);
1090 con->state = CON_IDLE;
1096 /* It must be a client socket. Find a context that has data
1097 * waiting on its socket *and* is in the CON_IDLE state. Any
1098 * active sockets other than our chosen one are marked as
1099 * CON_READY so the next thread that comes around can just bind
1100 * to one without having to select() again.
1102 begin_critical_section(S_SESSION_TABLE);
1103 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1104 if ( (FD_ISSET(ptr->client_socket, &readfds))
1105 && (ptr->state != CON_EXECUTING) ) {
1106 ptr->input_waiting = 1;
1108 bind_me = ptr; /* I choose you! */
1109 bind_me->state = CON_EXECUTING;
1112 ptr->state = CON_READY;
1116 end_critical_section(S_SESSION_TABLE);
1119 /* We're bound to a session */
1120 if (bind_me != NULL) {
1121 become_session(bind_me);
1123 /* If the client has sent a command, execute it. */
1124 if (CC->input_waiting) {
1125 CC->h_command_function();
1126 CC->input_waiting = 0;
1129 /* If there are asynchronous messages waiting and the
1130 * client supports it, do those now */
1131 if ((CC->is_async) && (CC->async_waiting)
1132 && (CC->h_async_function != NULL)) {
1133 CC->h_async_function();
1134 CC->async_waiting = 0;
1137 force_purge = CC->kill_me;
1138 become_session(NULL);
1139 bind_me->state = CON_IDLE;
1142 dead_session_purge(force_purge);
1144 check_sched_shutdown();
1147 /* If control reaches this point, the server is shutting down */
1156 * Translate text facility name to syslog.h defined value.
1158 int SyslogFacility(char *name)
1167 { LOG_KERN, "kern" },
1168 { LOG_USER, "user" },
1169 { LOG_MAIL, "mail" },
1170 { LOG_DAEMON, "daemon" },
1171 { LOG_AUTH, "auth" },
1172 { LOG_SYSLOG, "syslog" },
1174 { LOG_NEWS, "news" },
1175 { LOG_UUCP, "uucp" },
1176 { LOG_LOCAL0, "local0" },
1177 { LOG_LOCAL1, "local1" },
1178 { LOG_LOCAL2, "local2" },
1179 { LOG_LOCAL3, "local3" },
1180 { LOG_LOCAL4, "local4" },
1181 { LOG_LOCAL5, "local5" },
1182 { LOG_LOCAL6, "local6" },
1183 { LOG_LOCAL7, "local7" },
1186 for(i = 0; facTbl[i].name != NULL; i++) {
1187 if(!strcasecmp(name, facTbl[i].name))
1188 return facTbl[i].facility;
1195 /********** MEM CHEQQER ***********/
1197 #ifdef DEBUG_MEMORY_LEAKS
1204 void *tracked_malloc(size_t size, char *file, int line) {
1205 struct igheap *thisheap;
1208 block = malloc(size);
1209 if (block == NULL) return(block);
1211 thisheap = malloc(sizeof(struct igheap));
1212 if (thisheap == NULL) {
1217 thisheap->block = block;
1218 strcpy(thisheap->file, file);
1219 thisheap->line = line;
1221 begin_critical_section(S_DEBUGMEMLEAKS);
1222 thisheap->next = igheap;
1224 end_critical_section(S_DEBUGMEMLEAKS);
1230 void *tracked_realloc(void *ptr, size_t size, char *file, int line) {
1231 struct igheap *thisheap;
1234 block = realloc(ptr, size);
1235 if (block == NULL) return(block);
1237 thisheap = malloc(sizeof(struct igheap));
1238 if (thisheap == NULL) {
1243 thisheap->block = block;
1244 strcpy(thisheap->file, file);
1245 thisheap->line = line;
1247 begin_critical_section(S_DEBUGMEMLEAKS);
1248 thisheap->next = igheap;
1250 end_critical_section(S_DEBUGMEMLEAKS);
1257 void tracked_free(void *ptr) {
1258 struct igheap *thisheap;
1259 struct igheap *trash;
1263 if (igheap == NULL) return;
1264 begin_critical_section(S_DEBUGMEMLEAKS);
1265 for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1266 if (thisheap->next != NULL) {
1267 if (thisheap->next->block == ptr) {
1268 trash = thisheap->next;
1269 thisheap->next = thisheap->next->next;
1274 if (igheap->block == ptr) {
1276 igheap = igheap->next;
1279 end_critical_section(S_DEBUGMEMLEAKS);
1282 char *tracked_strdup(const char *s, char *file, int line) {
1285 if (s == NULL) return(NULL);
1286 ptr = tracked_malloc(strlen(s) + 1, file, line);
1287 if (ptr == NULL) return(NULL);
1288 strncpy(ptr, s, strlen(s));
1292 void dump_heap(void) {
1293 struct igheap *thisheap;
1295 for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1296 lprintf(CTDL_CRIT, "UNFREED: %30s : %d\n",
1297 thisheap->file, thisheap->line);
1301 #endif /* DEBUG_MEMORY_LEAKS */