* 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.
- *
- * $Id$
+ */
+/** @file
+ * @brief Entry point and other initialization functions for the daemon.
+ * @version $Id$
*/
#include "config.h"
#include "version.h"
#include "whowas.h"
-#include <assert.h>
+/* #include <assert.h> -- Now using assert in ircd_log.h */
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <sys/time.h>
+#ifdef HAVE_SYS_RESOURCE_H
+#include <sys/resource.h>
+#endif
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
* Constants / Enums
*--------------------------------------------------------------------------*/
enum {
- BOOT_DEBUG = 1,
- BOOT_TTY = 2,
- BOOT_CHKCONF = 3
+ 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 Connection me_con; /* That's me too */
-struct Client *GlobalClientList = &me; /* Pointer to beginning of
+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() */
+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 */
-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 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, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0 };
+/** 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
*--------------------------------------------------------------------------*/
+/** 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 */
/*----------------------------------------------------------------------------
* 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 panicing due to low memory */
+ /* 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();
/*----------------------------------------------------------------------------
* API: server_restart
*--------------------------------------------------------------------------*/
+/** 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;
log_close();
- close_connections(!(thisServer.bootopt & (BOOT_TTY | BOOT_DEBUG)));
+ close_connections(!(thisServer.bootopt & (BOOT_TTY | BOOT_DEBUG | BOOT_CHKCONF)));
+
+ reap_children();
execv(SPATH, thisServer.argv);
/*----------------------------------------------------------------------------
* 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) {
char buff[20];
feature_str(FEAT_PPATH)));
}
-/* check_pid
- *
- * inputs:
- * none
- * returns:
- * true - if the pid file exists (and is readable), and the pid refered
- * to in the file is still running.
- * false - otherwise.
+/** Try to create the PID file.
+ * @return Zero on success; non-zero on any error.
*/
static int check_pid(void)
{
if ((thisServer.pid_fd = open(feature_str(FEAT_PPATH), O_CREAT | O_RDWR,
0600)) >= 0)
- return fcntl(thisServer.pid_fd, F_SETLK, &lock);
+ return fcntl(thisServer.pid_fd, F_SETLK, &lock) == -1;
- return 0;
+ 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...)
- *--------------------------------------------------------------------------*/
+
+/** 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 Client* cptr;
struct ConfItem** pconf;
- int connecting;
- int confrq;
- time_t next = 0;
- struct ConnectionClass* cltmp;
- struct ConfItem* con_conf = 0;
+ time_t next;
struct Jupe* ajupe;
- const char* con_class = NULL;
+ int hold;
+ int done;
assert(ET_EXPIRE == ev_type(ev));
assert(0 != ev_timer(ev));
- connecting = FALSE;
Debug((DEBUG_NOTICE, "Connection check at : %s", myctime(CurrentTime)));
- for (aconf = GlobalConfList; aconf; aconf = aconf->next) {
- /* Also when already connecting! (update holdtimes) --SRB */
- if (!(aconf->status & CONF_SERVER) || aconf->address.port == 0 || aconf->hold == 0)
- continue;
-
- /* Also skip juped servers */
- if ((ajupe = jupe_find(aconf->name)) && JupeIsActive(ajupe))
- continue;
+ next = CurrentTime + feature_int(FEAT_CONNECTFREQUENCY);
+ done = 0;
- /* 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 >;) ]
+ for (aconf = GlobalConfList; aconf; aconf = aconf->next) {
+ /* Only consider server items with non-zero port and non-zero
+ * connect times that are not actively juped.
*/
- if (aconf->hold > CurrentTime && (next > aconf->hold || next == 0)) {
- next = aconf->hold;
+ if (!(aconf->status & CONF_SERVER)
+ || aconf->address.port == 0
+ || !(aconf->flags & CONF_AUTOCONNECT)
+ || ((ajupe = jupe_find(aconf->name)) && JupeIsActive(ajupe)))
continue;
- }
- cltmp = aconf->conn_class;
- confrq = get_con_freq(cltmp);
- if(confrq == 0)
- aconf->hold = next = 0;
- else
- aconf->hold = CurrentTime + confrq;
+ /* 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;
- /* Found a CONNECT config with port specified, scan clients and see if
- * this server is already connected?
+ /* 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.
*/
- cptr = FindServer(aconf->name);
+ if (hold || done
+ || (ConfLinks(aconf) > ConfMaxLinks(aconf))
+ || FindServer(aconf->name)
+ || conf_eval_crule(aconf->name, CRULE_MASK))
+ continue;
- if (!cptr && (Links(cltmp) < MaxLinks(cltmp)) &&
- (!connecting /*|| (ConClass(cltmp) > con_class)*/)) {
- /*
- * Check connect rules to see if we're allowed to try
- */
- if (0 == conf_eval_crule(aconf->name, CRULE_MASK)) {
- 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))
+ /* Activate the connection itself. */
+ if (connect_server(aconf, 0))
sendto_opmask_butone(0, SNO_OLDSNO, "Connection to %s activated.",
- con_conf->name);
- }
+ aconf->name);
- if (next == 0)
- next = CurrentTime + feature_int(FEAT_CONNECTFREQUENCY);
+ /* And stop looking for further candidates. */
+ done = 1;
+ }
Debug((DEBUG_NOTICE, "Next connection check : %s", myctime(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...
- *--------------------------------------------------------------------------*/
+/** 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;
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 unregisterd client and hasn't managed to register within
+ * 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.
*/
if (!IsRegistered(cptr)) {
assert(!IsServer(cptr));
- if ((CurrentTime-cli_firsttime(cptr) >= max_ping)) {
- /* Display message if they have sent a NICK and a USER but no
- * nospoof PONG.
- */
- if (*(cli_name(cptr)) && cli_user(cptr) && *(cli_user(cptr))->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 %s",
- feature_str(FEAT_URL_CLIENTS));
- }
- exit_client_msg(cptr,cptr,&me, "Registration Timeout");
- continue;
- } else {
- /* 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;
+ /* 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 (!IsPingSent(cptr))
{
- /* If we havent PINGed the connection and we havent heard from it in a
+ /* 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.
*/
SetPingSent(cptr);
if (IsUser(cptr))
sendrawto_one(cptr, MSG_PING " :%s", cli_name(&me));
else
- {
- char *asll_ts = militime_float(NULL);
- sendcmdto_one(&me, CMD_PING, cptr, "!%s %s %s", asll_ts,
- cli_name(cptr), asll_ts);
- }
+ sendcmdto_prio_one(&me, CMD_PING, cptr, ":%s", cli_name(&me));
}
expire = cli_lasttime(cptr) + max_ping * 2;
}
-/*----------------------------------------------------------------------------
- * parse_command_line
- * Side Effects: changes GLOBALS me, thisServer, dpath, configfile, debuglevel
- * debugmode
- *--------------------------------------------------------------------------*/
+/** 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:nktvx:";
+ 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; break;
+ 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;
#ifdef USE_DEVPOLL
printf("/dev/poll ");
#endif
+#ifdef USE_EPOLL
+ printf("epoll_*() ");
+#endif
#ifdef USE_POLL
printf("poll()");
#else
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;
setsid();
}
-/*----------------------------------------------------------------------------
- * 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;
* 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;
-/*----------------------------------------------------------------------------
- * 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) {
if (getuid() == 0 || geteuid() == 0 ||
getgid() == 0 || getegid() == 0) {
* 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);
!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();
log_init(*argv);
set_nomem_handler(outofmemory);
- if (!init_string()) {
- log_write(LS_SYSTEM, L_CRIT, 0, "Failed to initialize string module");
- return 6;
- }
-
initload();
init_list();
init_hash();
initmsgtree();
initstats();
- init_resolver();
-
/* we need this for now, when we're modular this
should be removed -- hikari */
ircd_crypt_init();
return 7;
}
- if(thisServer.bootopt & BOOT_CHKCONF) {
- fprintf(stdout, "Configuration file checked okay.\n");
+ if (thisServer.bootopt & BOOT_CHKCONF) {
+ if (dbg_client)
+ conf_debug_iline(dbg_client);
+ fprintf(stderr, "Configuration file %s checked okay.\n", configfile);
return 0;
}
debug_init(thisServer.bootopt & BOOT_TTY);
- daemon_init(thisServer.bootopt & BOOT_TTY);
if (check_pid()) {
Debug((DEBUG_FATAL, "Failed to acquire PID file lock after fork"));
exit(2);
cli_lasttime(&me) = cli_since(&me) = cli_firsttime(&me) = CurrentTime;
hAddClient(&me);
+ SetIPv6(&me);
write_pidfile();
init_counters();
projects / ircu2.10.12-pk.git / blobdiff