X-Git-Url: http://git.pk910.de/?a=blobdiff_plain;f=ircd%2Fircd.c;h=2a521703be67091563096cad4b0340801e93da48;hb=7fbb742f7d849cb57b23f2a76d90950174094719;hp=8de11424d9f8814f52b3b5a827e23daa40e6f95c;hpb=f17f0487c981da8c0c2b450fff45f13fd481a176;p=ircu2.10.12-pk.git diff --git a/ircd/ircd.c b/ircd/ircd.c index 8de1142..2a52170 100644 --- a/ircd/ircd.c +++ b/ircd/ircd.c @@ -16,27 +16,36 @@ * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * $Id$ */ -#include "ircd.h" +/** @file + * @brief Entry point and other initialization functions for the daemon. + * @version $Id$ + */ +#include "config.h" +#include "ircd.h" #include "IPcheck.h" #include "class.h" #include "client.h" #include "crule.h" +#include "destruct_event.h" #include "hash.h" #include "ircd_alloc.h" +#include "ircd_events.h" +#include "ircd_features.h" #include "ircd_log.h" #include "ircd_reply.h" #include "ircd_signal.h" #include "ircd_string.h" +#include "ircd_crypt.h" #include "jupe.h" #include "list.h" #include "match.h" +#include "motd.h" #include "msg.h" #include "numeric.h" #include "numnicks.h" +#include "opercmds.h" #include "parse.h" #include "res.h" #include "s_auth.h" @@ -44,6 +53,7 @@ #include "s_conf.h" #include "s_debug.h" #include "s_misc.h" +#include "s_stats.h" #include "send.h" #include "sys.h" #include "uping.h" @@ -51,7 +61,7 @@ #include "version.h" #include "whowas.h" -#include +/* #include -- Now using assert in ircd_log.h */ #include #include #include @@ -59,8 +69,13 @@ #include #include #include +#include +#ifdef HAVE_SYS_RESOURCE_H +#include +#endif #include #include +#include #include @@ -69,72 +84,111 @@ * External stuff *--------------------------------------------------------------------------*/ extern void init_counters(void); +extern void mem_dbg_initialise(void); /*---------------------------------------------------------------------------- * Constants / Enums *--------------------------------------------------------------------------*/ enum { - BOOT_DEBUG = 1, - BOOT_TTY = 2 + BOOT_DEBUG = 1, /**< Enable debug output. */ + BOOT_TTY = 2, /**< Stay connected to TTY. */ + BOOT_CHKCONF = 4 /**< Exit after reading configuration file. */ }; /*---------------------------------------------------------------------------- * Global data (YUCK!) *--------------------------------------------------------------------------*/ -struct Client me; // That's me -struct Client *GlobalClientList = &me; // Pointer to beginning of Client list -time_t TSoffset = 0; // Offset of timestamps to system clock -int GlobalRehashFlag = 0; // do a rehash if set -int GlobalRestartFlag = 0; // do a restart if set -time_t CurrentTime; // Updated every time we leave select() +struct Client me; /**< That's me */ +struct Connection me_con; /**< That's me too */ +struct Client *GlobalClientList = &me; /**< Pointer to beginning of + Client list */ +time_t TSoffset = 0; /**< Offset of timestamps to system clock */ +int GlobalRehashFlag = 0; /**< do a rehash if set */ +int GlobalRestartFlag = 0; /**< do a restart if set */ +time_t CurrentTime; /**< Updated every time we leave select() */ -char *configfile = CPATH; // Server configuration file -int debuglevel = -1; // Server debug level -char *debugmode = ""; // Server debug level -static char *dpath = DPATH; +char *configfile = CPATH; /**< Server configuration file */ +int debuglevel = -1; /**< Server debug level */ +char *debugmode = ""; /**< Server debug level */ +static char *dpath = DPATH; /**< Working directory for daemon */ +static char *dbg_client; /**< Client specifier for chkconf */ -time_t nextconnect = 1; // time for next try_connections call -time_t nextping = 1; // same as above for check_pings() +static struct Timer connect_timer; /**< timer structure for try_connections() */ +static struct Timer ping_timer; /**< timer structure for check_pings() */ +static struct Timer destruct_event_timer; /**< timer structure for exec_expired_destruct_events() */ -static struct Daemon thisServer = { 0 }; // server process info +/** Daemon information. */ +static struct Daemon thisServer = { 0, 0, 0, 0, 0, 0, -1 }; +/** Non-zero until we want to exit. */ +int running = 1; /*---------------------------------------------------------------------------- * API: server_die *--------------------------------------------------------------------------*/ -void server_die(const char* message) { - ircd_log(L_CRIT, "Server terminating: %s", message); - sendto_opmask_butone(0, SNO_OLDSNO, "Server terminating: %s", message); +/** Terminate the server with a message. + * @param[in] message Message to log and send to operators. + */ +void server_die(const char *message) +{ + /* log_write will send out message to both log file and as server notice */ + log_write(LS_SYSTEM, L_CRIT, 0, "Server terminating: %s", message); flush_connections(0); close_connections(1); - thisServer.running = 0; + running = 0; } +/*---------------------------------------------------------------------------- + * API: server_panic + *--------------------------------------------------------------------------*/ +/** Immediately terminate the server with a message. + * @param[in] message Message to log, but not send to operators. + */ +void server_panic(const char *message) +{ + /* inhibit sending server notice--we may be panicking due to low memory */ + log_write(LS_SYSTEM, L_CRIT, LOG_NOSNOTICE, "Server panic: %s", message); + flush_connections(0); + log_close(); + close_connections(1); + exit(1); +} /*---------------------------------------------------------------------------- * API: server_restart *--------------------------------------------------------------------------*/ -void server_restart(const char* message) { +/** Restart the server with a message. + * @param[in] message Message to log and send to operators. + */ +void server_restart(const char *message) +{ static int restarting = 0; - ircd_log(L_WARNING, "Restarting Server: %s", message); - if (restarting) + /* inhibit sending any server notices; we may be in a loop */ + log_write(LS_SYSTEM, L_WARNING, LOG_NOSNOTICE, "Restarting Server: %s", + message); + if (restarting++) /* increment restarting to prevent looping */ return; sendto_opmask_butone(0, SNO_OLDSNO, "Restarting server: %s", message); Debug((DEBUG_NOTICE, "Restarting server...")); flush_connections(0); - close_log(); - close_connections(!(thisServer.bootopt & (BOOT_TTY | BOOT_DEBUG))); + log_close(); + + close_connections(!(thisServer.bootopt & (BOOT_TTY | BOOT_DEBUG | BOOT_CHKCONF))); + + reap_children(); execv(SPATH, thisServer.argv); /* Have to reopen since it has been closed above */ - open_log(*thisServer.argv); - ircd_log(L_CRIT, "execv(%s,%s) failed: %m\n", SPATH, *thisServer.argv); + log_reopen(); + + log_write(LS_SYSTEM, L_CRIT, 0, "execv(%s,%s) failed: %m", SPATH, + *thisServer.argv); Debug((DEBUG_FATAL, "Couldn't restart server \"%s\": %s", SPATH, (strerror(errno)) ? strerror(errno) : "")); @@ -145,132 +199,138 @@ void server_restart(const char* message) { /*---------------------------------------------------------------------------- * outofmemory: Handler for out of memory conditions... *--------------------------------------------------------------------------*/ +/** Handle out-of-memory condition. */ static void outofmemory(void) { Debug((DEBUG_FATAL, "Out of memory: restarting server...")); server_restart("Out of Memory"); -} +} /*---------------------------------------------------------------------------- * write_pidfile *--------------------------------------------------------------------------*/ +/** Write process ID to PID file. */ static void write_pidfile(void) { - FILE *pidf; - - if (!(pidf = fopen(PPATH, "w+"))) { - Debug((DEBUG_NOTICE, - "Error opening pid file \"%s\": %s", PPATH, strerror(errno))); + char buff[20]; + + if (thisServer.pid_fd >= 0) { + memset(buff, 0, sizeof(buff)); + sprintf(buff, "%5d\n", (int)getpid()); + if (write(thisServer.pid_fd, buff, strlen(buff)) == -1) + Debug((DEBUG_NOTICE, "Error writing to pid file %s: %m", + feature_str(FEAT_PPATH))); return; } - - if (fprintf(pidf, "%5d\n", getpid()) < 5) - Debug((DEBUG_NOTICE, "Error writing to pid file %s", PPATH)); + Debug((DEBUG_NOTICE, "Error opening pid file %s: %m", + feature_str(FEAT_PPATH))); +} - fclose(pidf); +/** Try to create the PID file. + * @return Zero on success; non-zero on any error. + */ +static int check_pid(void) +{ + struct flock lock; + + lock.l_type = F_WRLCK; + lock.l_start = 0; + lock.l_whence = SEEK_SET; + lock.l_len = 0; + + if ((thisServer.pid_fd = open(feature_str(FEAT_PPATH), O_CREAT | O_RDWR, + 0600)) >= 0) + return fcntl(thisServer.pid_fd, F_SETLK, &lock) == -1; + + return 1; } -/*---------------------------------------------------------------------------- - * try_connections - * - * Scan through configuration and try new connections. - * - * Returns the calendar time when the next call to this - * function should be made latest. (No harm done if this - * is called earlier or later...) - *--------------------------------------------------------------------------*/ -static time_t try_connections(void) { - struct ConfItem *aconf; - struct Client *cptr; - struct ConfItem **pconf; - int connecting; - int confrq; - time_t next = 0; - struct ConfClass *cltmp; - struct ConfItem *cconf; - struct ConfItem *con_conf = NULL; - struct Jupe *ajupe; - unsigned int con_class = 0; - - connecting = FALSE; +/** Look for any connections that we should try to initiate. + * Reschedules itself to run again at the appropriate time. + * @param[in] ev Timer event (ignored). + */ +static void try_connections(struct Event* ev) { + struct ConfItem* aconf; + struct ConfItem** pconf; + time_t next; + struct Jupe* ajupe; + int hold; + int done; + + assert(ET_EXPIRE == ev_type(ev)); + assert(0 != ev_timer(ev)); + Debug((DEBUG_NOTICE, "Connection check at : %s", myctime(CurrentTime))); + next = CurrentTime + feature_int(FEAT_CONNECTFREQUENCY); + done = 0; + for (aconf = GlobalConfList; aconf; aconf = aconf->next) { - /* Also when already connecting! (update holdtimes) --SRB */ - if (!(aconf->status & CONF_SERVER) || aconf->port == 0) + /* Only consider server items with non-zero port and non-zero + * connect times that are not actively juped. + */ + if (!(aconf->status & CONF_SERVER) + || aconf->address.port == 0 + || !(aconf->flags & CONF_AUTOCONNECT) + || ((ajupe = jupe_find(aconf->name)) && JupeIsActive(ajupe))) continue; - /* Also skip juped servers */ - if ((ajupe = jupe_find(aconf->name)) && JupeIsActive(ajupe)) - continue; + /* Do we need to postpone this connection further? */ + hold = aconf->hold > CurrentTime; + + /* Update next possible connection check time. */ + if (hold && next > aconf->hold) + next = aconf->hold; - /* Skip this entry if the use of it is still on hold until - * future. Otherwise handle this entry (and set it on hold until next - * time). Will reset only hold times, if already made one successfull - * connection... [this algorithm is a bit fuzzy... -- msa >;) ] + /* Do not try to connect if its use is still on hold until future, + * we have already initiated a connection this try_connections(), + * too many links in its connection class, it is already linked, + * or if connect rules forbid a link now. */ - if (aconf->hold > CurrentTime && (next > aconf->hold || next == 0)) { - next = aconf->hold; + if (hold || done + || (ConfLinks(aconf) > ConfMaxLinks(aconf)) + || FindServer(aconf->name) + || conf_eval_crule(aconf->name, CRULE_MASK)) continue; - } - - cltmp = aconf->confClass; - confrq = get_con_freq(cltmp); - aconf->hold = CurrentTime + confrq; - /* Found a CONNECT config with port specified, scan clients and see if - * this server is already connected? - */ - cptr = FindServer(aconf->name); - - if (!cptr && (Links(cltmp) < MaxLinks(cltmp)) && - (!connecting || (ConClass(cltmp) > con_class))) { - /* Check connect rules to see if we're allowed to try */ - for (cconf = GlobalConfList; cconf; cconf = cconf->next) { - if ((cconf->status & CONF_CRULE) && !match(cconf->host, aconf->name)) - if (crule_eval(cconf->passwd)) - break; - } - if (!cconf) { - con_class = ConClass(cltmp); - con_conf = aconf; - /* We connect only one at time... */ - connecting = TRUE; - } - } - if ((next > aconf->hold) || (next == 0)) - next = aconf->hold; - } - if (connecting) { - if (con_conf->next) { /* are we already last? */ - /* Put the current one at the end and make sure we try all connections */ - for (pconf = &GlobalConfList; (aconf = *pconf); pconf = &(aconf->next)) - if (aconf == con_conf) + /* Ensure it is at the end of the list for future checks. */ + if (aconf->next) { + /* Find aconf's location in the list and splice it out. */ + for (pconf = &GlobalConfList; *pconf; pconf = &(*pconf)->next) + if (*pconf == aconf) *pconf = aconf->next; - (*pconf = con_conf)->next = 0; + /* Reinsert it at the end of the list (where pconf is now). */ + *pconf = aconf; + aconf->next = 0; } - if (connect_server(con_conf, 0, 0)) + /* Activate the connection itself. */ + if (connect_server(aconf, 0)) sendto_opmask_butone(0, SNO_OLDSNO, "Connection to %s activated.", - con_conf->name); + aconf->name); + + /* And stop looking for further candidates. */ + done = 1; } Debug((DEBUG_NOTICE, "Next connection check : %s", myctime(next))); - return(next); + timer_add(&connect_timer, try_connections, 0, TT_ABSOLUTE, next); } -/*---------------------------------------------------------------------------- - * check_pings - * - * TODO: This should be moved out of ircd.c. It's protocol-specific when you - * get right down to it. Can't really be done until the server is more - * modular, however... - *--------------------------------------------------------------------------*/ -static time_t check_pings(void) { - int expire = 0; - int next_check = CurrentTime + PINGFREQUENCY; +/** Check for clients that have not sent a ping response recently. + * Reschedules itself to run again at the appropriate time. + * @param[in] ev Timer event (ignored). + */ +static void check_pings(struct Event* ev) { + int expire = 0; + int next_check = CurrentTime; int max_ping = 0; int i; + + assert(ET_EXPIRE == ev_type(ev)); + assert(0 != ev_timer(ev)); + + next_check += feature_int(FEAT_PINGFREQUENCY); /* Scan through the client table */ for (i=0; i <= HighestFd; i++) { @@ -284,73 +344,102 @@ static time_t check_pings(void) { /* Remove dead clients. */ if (IsDead(cptr)) { - exit_client(cptr, cptr, &me, cptr->info); + exit_client(cptr, cptr, &me, cli_info(cptr)); continue; } - max_ping = IsRegistered(cptr) ? get_client_ping(cptr) : CONNECTTIMEOUT; + max_ping = IsRegistered(cptr) ? client_get_ping(cptr) : + feature_int(FEAT_CONNECTTIMEOUT); Debug((DEBUG_DEBUG, "check_pings(%s)=status:%s limit: %d current: %d", - cptr->name, (cptr->flags & FLAGS_PINGSENT) ? "[Ping Sent]" : "[]", - max_ping, (int)(CurrentTime - cptr->lasttime))); - + cli_name(cptr), + IsPingSent(cptr) ? "[Ping Sent]" : "[]", + max_ping, (int)(CurrentTime - cli_lasttime(cptr)))); + + /* If it's a server and we have not sent an AsLL lately, do so. */ + if (IsServer(cptr)) { + if (CurrentTime - cli_serv(cptr)->asll_last >= max_ping) { + char *asll_ts; + + SetPingSent(cptr); + cli_serv(cptr)->asll_last = CurrentTime; + expire = cli_serv(cptr)->asll_last + max_ping; + asll_ts = militime_float(NULL); + sendcmdto_prio_one(&me, CMD_PING, cptr, "!%s %s %s", asll_ts, + cli_name(cptr), asll_ts); + } + + expire = cli_serv(cptr)->asll_last + max_ping; + if (expire < next_check) + next_check = expire; + } /* Ok, the thing that will happen most frequently, is that someone will * have sent something recently. Cover this first for speed. + * -- + * If it's an unregistered client and hasn't managed to register within + * max_ping then it's obviously having problems (broken client) or it's + * just up to no good, so we won't skip it, even if its been sending + * data to us. + * -- hikari */ - if (CurrentTime-cptr->lasttime < max_ping) { - expire = cptr->lasttime + max_ping; + if ((CurrentTime-cli_lasttime(cptr) < max_ping) && IsRegistered(cptr)) { + expire = cli_lasttime(cptr) + max_ping; if (expire < next_check) next_check = expire; continue; } - /* Quit the client after max_ping*2 - they should have answered by now */ - if (CurrentTime-cptr->lasttime >= (max_ping*2) ) { - /* If it was a server, then tell ops about it. */ - if (IsServer(cptr) || IsConnecting(cptr) || IsHandshake(cptr)) - sendto_opmask_butone(0, SNO_OLDSNO, - "No response from %s, closing link", cptr->name); - exit_client_msg(cptr, cptr, &me, "Ping timeout"); - continue; - } - /* Unregistered clients pingout after max_ping seconds, they don't * get given a second chance - if they were then people could not quite * finish registration and hold resources without being subject to k/g * lines */ if (!IsRegistered(cptr)) { - /* Display message if they have sent a NICK and a USER but no - * nospoof PONG. - */ - if (*cptr->name && cptr->user && *cptr->user->username) { - send_reply(cptr, SND_EXPLICIT | ERR_BADPING, - ":Your client may not be compatible with this server."); - send_reply(cptr, SND_EXPLICIT | ERR_BADPING, - ":Compatible clients are available at " - "ftp://ftp.undernet.org/pub/irc/clients"); - } - exit_client_msg(cptr,cptr,&me, "Ping Timeout"); + assert(!IsServer(cptr)); + /* If client authorization time has expired, ask auth whether they + * should be checked again later. */ + if ((CurrentTime-cli_firsttime(cptr) >= max_ping) + && auth_ping_timeout(cptr)) + continue; + /* OK, they still have enough time left, so we'll just skip to the + * next client. Set the next check to be when their time is up, if + * that's before the currently scheduled next check -- hikari */ + expire = cli_firsttime(cptr) + max_ping; + if (expire < next_check) + next_check = expire; + continue; + } + + /* Quit the client after max_ping*2 - they should have answered by now */ + if (CurrentTime-cli_lasttime(cptr) >= (max_ping*2) ) + { + /* If it was a server, then tell ops about it. */ + if (IsServer(cptr) || IsConnecting(cptr) || IsHandshake(cptr)) + sendto_opmask_butone(0, SNO_OLDSNO, + "No response from %s, closing link", + cli_name(cptr)); + exit_client_msg(cptr, cptr, &me, "Ping timeout"); continue; } - if (!(cptr->flags & FLAGS_PINGSENT)) { - /* If we havent PINGed the connection and we havent heard from it in a + if (!IsPingSent(cptr)) + { + /* If we haven't PINGed the connection and we haven't heard from it in a * while, PING it to make sure it is still alive. */ - cptr->flags |= FLAGS_PINGSENT; + SetPingSent(cptr); /* If we're late in noticing don't hold it against them :) */ - cptr->lasttime = CurrentTime - max_ping; + cli_lasttime(cptr) = CurrentTime - max_ping; if (IsUser(cptr)) - sendrawto_one(cptr, MSG_PING " :%s", me.name); + sendrawto_one(cptr, MSG_PING " :%s", cli_name(&me)); else - sendcmdto_one(&me, CMD_PING, cptr, ":%s", me.name); + sendcmdto_prio_one(&me, CMD_PING, cptr, ":%s", cli_name(&me)); } - expire = cptr->lasttime + max_ping * 2; + expire = cli_lasttime(cptr) + max_ping * 2; if (expire < next_check) next_check=expire; } @@ -360,58 +449,90 @@ static time_t check_pings(void) { Debug((DEBUG_DEBUG, "[%i] check_pings() again in %is", CurrentTime, next_check-CurrentTime)); - return next_check; + timer_add(&ping_timer, check_pings, 0, TT_ABSOLUTE, next_check); } -/*---------------------------------------------------------------------------- - * parse_command_line - *--------------------------------------------------------------------------*/ +/** Parse command line arguments. + * Global variables are updated to reflect the arguments. + * As a side effect, makes sure the process's effective user id is the + * same as the real user id. + * @param[in] argc Number of arguments on command line. + * @param[in,out] argv Command-lne arguments. + */ static void parse_command_line(int argc, char** argv) { - const char *options = "d:f:h:ntvx:"; + const char *options = "d:f:h:nktvx:c:"; int opt; if (thisServer.euid != thisServer.uid) setuid(thisServer.uid); - /* Do we really need to santiy check the non-NULLness of optarg? That's + /* Do we really need to sanity check the non-NULLness of optarg? That's * getopt()'s job... Removing those... -zs */ while ((opt = getopt(argc, argv, options)) != EOF) switch (opt) { + case 'k': thisServer.bootopt |= BOOT_CHKCONF | BOOT_TTY; break; + case 'c': dbg_client = optarg; break; case 'n': case 't': thisServer.bootopt |= BOOT_TTY; break; case 'd': dpath = optarg; break; case 'f': configfile = optarg; break; - case 'h': ircd_strncpy(me.name, optarg, HOSTLEN); break; - case 'v': printf("ircd %s\n", version); exit(0); - + case 'h': ircd_strncpy(cli_name(&me), optarg, HOSTLEN); break; + case 'v': + printf("ircd %s\n", version); + printf("Event engines: "); +#ifdef USE_KQUEUE + printf("kqueue() "); +#endif +#ifdef USE_DEVPOLL + printf("/dev/poll "); +#endif +#ifdef USE_EPOLL + printf("epoll_*() "); +#endif +#ifdef USE_POLL + printf("poll()"); +#else + printf("select()"); +#endif + printf("\nCompiled for a maximum of %d connections.\n", MAXCONNECTIONS); + + + exit(0); + break; + case 'x': debuglevel = atoi(optarg); if (debuglevel < 0) debuglevel = 0; debugmode = optarg; thisServer.bootopt |= BOOT_DEBUG; +#ifndef DEBUGMODE + printf("WARNING: DEBUGMODE disabled; -x has no effect.\n"); +#endif break; - + default: - printf("Usage: ircd [-f config] [-h servername] [-x loglevel] [-ntv]\n"); - printf("\n -n -t\t Don't detach\n -v\t display version\n\n"); - printf("Server not started.\n"); + printf("Usage: ircd [-f config] [-h servername] [-x loglevel] [-ntv] [-k [-c clispec]]\n" + "\n -f config\t specify explicit configuration file" + "\n -x loglevel\t set debug logging verbosity" + "\n -n or -t\t don't detach" + "\n -v\t\t display version" + "\n -k\t\t exit after checking config" + "\n -c clispec\t search for client/kill blocks matching client" + "\n\t\t clispec is comma-separated list of user@host," + "\n\t\t user@ip, $Rrealname, and port number" + "\n\nServer not started.\n"); exit(1); } } -/*---------------------------------------------------------------------------- - * daemon_init - *--------------------------------------------------------------------------*/ +/** Become a daemon. + * @param[in] no_fork If non-zero, do not fork into the background. + */ static void daemon_init(int no_fork) { - if (!init_connection_limits()) - exit(9); - - close_connections(!(thisServer.bootopt & (BOOT_DEBUG | BOOT_TTY))); - if (no_fork) return; @@ -431,89 +552,22 @@ static void daemon_init(int no_fork) { setsid(); } - -/*---------------------------------------------------------------------------- - * event_loop - *--------------------------------------------------------------------------*/ -static void event_loop(void) { - time_t nextdnscheck = 0; - time_t delay = 0; - - thisServer.running = 1; - while (thisServer.running) { - /* We only want to connect if a connection is due, not every time through. - * Note, if there are no active C lines, this call to Tryconnections is - * made once only; it will return 0. - avalon - */ - if (nextconnect && CurrentTime >= nextconnect) - nextconnect = try_connections(); - - /* DNS checks. One to timeout queries, one for cache expiries. */ - nextdnscheck = timeout_resolver(CurrentTime); - - /* Take the smaller of the two 'timed' event times as the time of next - * event (stops us being late :) - avalon - * WARNING - nextconnect can return 0! - */ - if (nextconnect) - delay = IRCD_MIN(nextping, nextconnect); - else - delay = nextping; - - delay = IRCD_MIN(nextdnscheck, delay) - CurrentTime; - - /* Adjust delay to something reasonable [ad hoc values] (one might think - * something more clever here... --msa) We don't really need to check that - * often and as long as we don't delay too long, everything should be ok. - * waiting too long can cause things to timeout... i.e. PINGS -> a - * disconnection :( - avalon - */ - if (delay < 1) - read_message(1); - else - read_message(IRCD_MIN(delay, TIMESEC)); - - /* ...perhaps should not do these loops every time, but only if there is - * some chance of something happening (but, note that conf->hold times may - * be changed elsewhere--so precomputed next event time might be too far - * away... (similarly with ping times) --msa - */ - if (CurrentTime >= nextping) - nextping = check_pings(); - - /* timeout pending queries that haven't been responded to */ - timeout_auth_queries(CurrentTime); - - ip_registry_expire(); - - if (GlobalRehashFlag) { - rehash(&me, 1); - GlobalRehashFlag = 0; - } - - if (GlobalRestartFlag) - server_restart("caught signal: SIGINT"); - } -} - - -/*---------------------------------------------------------------------------- - * check_file_access: random helper function to make sure that a file is - * accessible in a certain way, and complain if not. - *--------------------------------------------------------------------------*/ +/** Check that we have access to a particular file. + * If we do not have access to the file, complain on stderr. + * @param[in] path File name to check for access. + * @param[in] which Configuration character associated with file. + * @param[in] mode Bitwise combination of R_OK, W_OK, X_OK and/or F_OK. + * @return Non-zero if we have the necessary access, zero if not. + */ static char check_file_access(const char *path, char which, int mode) { if (!access(path, mode)) return 1; fprintf(stderr, "Check on %cPATH (%s) failed: %s\n" - "Please create file and/or rerun `make config' and " - "recompile to correct this.\n", - which, path, strerror(errno)); - -#ifdef CHROOTDIR - fprintf(stderr, "Keep in mind that paths are relative to CHROOTDIR.\n"); -#endif + "Please create this file and/or rerun `configure' " + "using --with-%cpath and recompile to correct this.\n", + which, path, strerror(errno), which); return 0; } @@ -523,6 +577,7 @@ static char check_file_access(const char *path, char which, int mode) { * set_core_limit *--------------------------------------------------------------------------*/ #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_CORE) +/** Set the core size soft limit to the same as the hard limit. */ static void set_core_limit(void) { struct rlimit corelim; @@ -539,41 +594,10 @@ static void set_core_limit(void) { -/*---------------------------------------------------------------------------- - * set_chroot_environment - *--------------------------------------------------------------------------*/ -#ifdef CHROOTDIR -static char set_chroot_environment(void) { - /* Must be root to chroot! Silly if you ask me... */ - if (geteuid()) - seteuid(0); - - if (chdir(dpath)) { - fprintf(stderr, "Fail: Cannot chdir(%s): %s\n", dpath, strerror(errno)); - return 0; - } - if (chroot(dpath)) { - fprintf(stderr, "Fail: Cannot chroot(%s): %s\n", dpath, strerror(errno)); - return 0; - } - dpath = "/"; - return 1; -} -#endif - - -/*---------------------------------------------------------------------------- - * set_userid_if_needed() - *--------------------------------------------------------------------------*/ +/** Complain to stderr if any user or group ID belongs to the superuser. + * @return Non-zero if all IDs are okay, zero if some are 0. + */ static int set_userid_if_needed(void) { - /* TODO: Drop privs correctly! */ -#if defined(IRC_GID) && defined(IRC_UID) - setgid (IRC_GID); - setegid(IRC_GID); - setuid (IRC_UID); - seteuid(IRC_UID); -#endif - if (getuid() == 0 || geteuid() == 0 || getgid() == 0 || getegid() == 0) { fprintf(stderr, "ERROR: This server will not run as superuser.\n"); @@ -591,6 +615,10 @@ static int set_userid_if_needed(void) { * we're doing waaaaaaaaay too much server initialization here. I hate * long and ugly control paths... -smd *--------------------------------------------------------------------------*/ +/** Run the daemon. + * @param[in] argc Number of arguments in \a argv. + * @param[in] argv Arguments to program execution. + */ int main(int argc, char **argv) { CurrentTime = time(NULL); @@ -599,9 +627,8 @@ int main(int argc, char **argv) { thisServer.uid = getuid(); thisServer.euid = geteuid(); -#ifdef CHROOTDIR - if (!set_chroot_environment()) - exit(1); +#ifdef MDEBUG + mem_dbg_initialise(); #endif #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_CORE) @@ -610,88 +637,130 @@ int main(int argc, char **argv) { umask(077); /* better safe than sorry --SRB */ memset(&me, 0, sizeof(me)); - me.fd = -1; - - setup_signals(); - initload(); + memset(&me_con, 0, sizeof(me_con)); + cli_connect(&me) = &me_con; + cli_fd(&me) = -1; parse_command_line(argc, argv); if (chdir(dpath)) { fprintf(stderr, "Fail: Cannot chdir(%s): %s, check DPATH\n", dpath, strerror(errno)); - exit(2); + return 2; } if (!set_userid_if_needed()) - exit(3); + return 3; /* Check paths for accessibility */ if (!check_file_access(SPATH, 'S', X_OK) || - !check_file_access(configfile, 'C', R_OK) || - !check_file_access(MPATH, 'M', R_OK) || - !check_file_access(RPATH, 'R', R_OK)) - exit(4); - -#ifdef DEBUG - if (!check_file_access(LPATH, 'L', W_OK)) - exit(5); + !check_file_access(configfile, 'C', R_OK)) + return 4; + + if (!init_connection_limits()) + return 9; + + close_connections(!(thisServer.bootopt & (BOOT_DEBUG | BOOT_TTY | BOOT_CHKCONF))); + + /* daemon_init() must be before event_init() because kqueue() FDs + * are, perversely, not inherited across fork(). + */ + daemon_init(thisServer.bootopt & BOOT_TTY); + +#ifdef DEBUGMODE + /* Must reserve fd 2... */ + if (debuglevel >= 0 && !(thisServer.bootopt & BOOT_TTY)) { + int fd; + if ((fd = open("/dev/null", O_WRONLY)) < 0) { + fprintf(stderr, "Unable to open /dev/null (to reserve fd 2): %s\n", + strerror(errno)); + return 8; + } + if (fd != 2 && dup2(fd, 2) < 0) { + fprintf(stderr, "Unable to reserve fd 2; dup2 said: %s\n", + strerror(errno)); + return 8; + } + } #endif + event_init(MAXCONNECTIONS); + + setup_signals(); + feature_init(); /* initialize features... */ + log_init(*argv); + set_nomem_handler(outofmemory); + + initload(); init_list(); - hash_init(); - initclass(); + init_hash(); + init_class(); initwhowas(); initmsgtree(); initstats(); - debug_init(thisServer.bootopt & BOOT_TTY); - daemon_init(thisServer.bootopt & BOOT_TTY); + /* we need this for now, when we're modular this + should be removed -- hikari */ + ircd_crypt_init(); - set_nomem_handler(outofmemory); - init_resolver(); + motd_init(); - open_log(*argv); + if (!init_conf()) { + log_write(LS_SYSTEM, L_CRIT, 0, "Failed to read configuration file %s", + configfile); + return 7; + } - if (!conf_init()) { - Debug((DEBUG_FATAL, "Failed to read configuration file %s", configfile)); - printf("Couldn't open configuration file %s\n", configfile); - exit(6); + if (thisServer.bootopt & BOOT_CHKCONF) { + if (dbg_client) + conf_debug_iline(dbg_client); + fprintf(stderr, "Configuration file %s checked okay.\n", configfile); + return 0; } - if (!init_server_identity()) { - Debug((DEBUG_FATAL, "Failed to initialize server identity")); - exit(7); + debug_init(thisServer.bootopt & BOOT_TTY); + if (check_pid()) { + Debug((DEBUG_FATAL, "Failed to acquire PID file lock after fork")); + exit(2); } + init_server_identity(); + uping_init(); - read_tlines(); - rmotd = read_motd(RPATH); - motd = read_motd(MPATH); + stats_init(); + + IPcheck_init(); + timer_add(timer_init(&connect_timer), try_connections, 0, TT_RELATIVE, 1); + timer_add(timer_init(&ping_timer), check_pings, 0, TT_RELATIVE, 1); + timer_add(timer_init(&destruct_event_timer), exec_expired_destruct_events, 0, TT_PERIODIC, 60); + CurrentTime = time(NULL); - me.from = &me; SetMe(&me); + cli_magic(&me) = CLIENT_MAGIC; + cli_from(&me) = &me; make_server(&me); - me.serv->timestamp = TStime(); /* Abuse own link timestamp as start TS */ - me.serv->prot = atoi(MAJOR_PROTOCOL); - me.serv->up = &me; - me.serv->down = NULL; - me.handler = SERVER_HANDLER; + cli_serv(&me)->timestamp = TStime(); /* Abuse own link timestamp as start TS */ + cli_serv(&me)->prot = atoi(MAJOR_PROTOCOL); + cli_serv(&me)->up = &me; + cli_serv(&me)->down = NULL; + cli_handler(&me) = SERVER_HANDLER; SetYXXCapacity(&me, MAXCLIENTS); - me.lasttime = me.since = me.firsttime = CurrentTime; + cli_lasttime(&me) = cli_since(&me) = cli_firsttime(&me) = CurrentTime; hAddClient(&me); +#ifdef IPV6 + SetIPv6(&me); +#endif - check_class(); write_pidfile(); init_counters(); Debug((DEBUG_NOTICE, "Server ready...")); - ircd_log(L_NOTICE, "Server Ready"); + log_write(LS_SYSTEM, L_NOTICE, 0, "Server Ready"); event_loop();