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kamailio/main.c

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/*
* $Id$
*
* Copyright (C) 2001-2003 FhG Fokus
*
* This file is part of SIP-router, a free SIP server.
*
* SIP-router is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version
*
* SIP-router is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* History:
* -------
* 2002-01-29 argc/argv globalized via my_{argc|argv} (jiri)
* 2003-01-23 mhomed added (jiri)
* 2003-03-19 replaced all malloc/frees w/ pkg_malloc/pkg_free (andrei)
* 2003-03-29 pkg cleaners for fifo and script callbacks introduced (jiri)
* 2003-03-31 removed snmp part (obsolete & no place in core) (andrei)
* 2003-04-06 child_init called in all processes (janakj)
* 2003-04-08 init_mallocs split into init_{pkg,shm}_mallocs and
* init_shm_mallocs called after cmd. line parsing (andrei)
* 2003-04-15 added tcp_disable support (andrei)
* 2003-05-09 closelog() before openlog to force opening a new fd
* (needed on solaris) (andrei)
* 2003-06-11 moved all signal handlers init. in install_sigs and moved it
* after daemonize (so that we won't catch anymore our own
* SIGCHLD generated when becoming session leader) (andrei)
* changed is_main default value to 1 (andrei)
* 2003-06-28 kill_all_children is now used instead of kill(0, sig)
* see comment above it for explanations. (andrei)
* 2003-06-29 replaced port_no_str snprintf w/ int2str (andrei)
* 2003-10-10 added switch for config check (-c) (andrei)
* 2003-10-24 converted to the new socket_info lists (andrei)
* 2004-03-30 core dump is enabled by default
* added support for increasing the open files limit (andrei)
* 2004-04-28 sock_{user,group,uid,gid,mode} added
* user2uid() & user2gid() added (andrei)
* 2004-09-11 added timeout on children shutdown and final cleanup
* (if it takes more than 60s => something is definitely wrong
* => kill all or abort) (andrei)
* force a shm_unlock before cleaning-up, in case we have a
* crashed childvwhich still holds the lock (andrei)
* 2004-12-02 removed -p, extended -l to support [proto:]address[:port],
* added parse_phostport, parse_proto (andrei)
* 2005-06-16 always record the pid in pt[process_no].pid twice: once in the
* parent & once in the child to avoid a short window when one
* of them might use it "unset" (andrei)
* 2005-07-25 use sigaction for setting the signal handlers (andrei)
* 2006-07-13 added dns cache/failover init. (andrei)
* 2006-10-13 added global variables stun_refresh_interval, stun_allow_stun
* and stun_allow_fp (vlada)
* 2006-10-25 don't log messages from signal handlers if NO_SIG_DEBUG is
* defined; improved exit kill timeout (andrei)
* init_childs(PROC_MAIN) before starting tcp_main, to allow
* tcp usage for module started processes (andrei)
* 2007-01-18 children shutdown procedure moved into shutdown_children;
* safer shutdown on start-up error (andrei)
* 2007-02-09 TLS support split into tls-in-core (CORE_TLS) and generic TLS
* (USE_TLS) (andrei)
* 2007-06-07 added support for locking pages in mem. and using real time
* scheduling policies (andrei)
* 2007-07-30 dst blacklist and DNS cache measurements added (Gergo)
* 2008-08-08 sctp support (andrei)
* 2008-08-19 -l support for mmultihomed addresses/addresses lists
* (e.g. -l (eth0, 1.2.3.4, foo.bar) ) (andrei)
* 2010-04-19 added daemon_status_fd pipe to communicate the parent process
* with the main process in daemonize mode, so the parent process
* can return the proper exit status code (ibc)
* 2010-08-19 moved the daemon status stuff to daemonize.c (andrei)
*/
/** main file (init, daemonize, startup)
* @file main.c
* @ingroup core
* Module: core
*/
/*! @defgroup core SIP-router core
*
* sip router core part.
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <ctype.h>
#include <string.h>
#include <netdb.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#if defined(HAVE_NETINET_IN_SYSTM)
#include <netinet/in_systm.h>
#endif
#include <netinet/in.h>
#include <netinet/ip.h>
#include <arpa/inet.h>
#include <sys/utsname.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <pwd.h>
#include <grp.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <net/if.h>
#ifdef HAVE_SYS_SOCKIO_H
#include <sys/sockio.h>
#endif
#include "config.h"
#include "dprint.h"
#include "daemonize.h"
#include "route.h"
#include "udp_server.h"
#include "globals.h"
#include "mem/mem.h"
#ifdef SHM_MEM
#include "mem/shm_mem.h"
#include "shm_init.h"
#endif /* SHM_MEM */
#include "sr_module.h"
#include "timer.h"
#include "parser/msg_parser.h"
#include "ip_addr.h"
#include "resolve.h"
#include "parser/parse_hname2.h"
#include "parser/digest/digest_parser.h"
#include "name_alias.h"
#include "hash_func.h"
#include "pt.h"
#include "script_cb.h"
#include "nonsip_hooks.h"
#include "ut.h"
#include "signals.h"
#ifdef USE_RAW_SOCKS
#include "raw_sock.h"
#endif /* USE_RAW_SOCKS */
#ifdef USE_TCP
#include "poll_types.h"
#include "tcp_init.h"
#include "tcp_options.h"
#ifdef CORE_TLS
#include "tls/tls_init.h"
#define tls_has_init_si() 1
#define tls_loaded() 1
#else
#include "tls_hooks_init.h"
#endif /* CORE_TLS */
#endif /* USE_TCP */
#ifdef USE_SCTP
#include "sctp_options.h"
#include "sctp_server.h"
#endif
#include "usr_avp.h"
#include "rpc_lookup.h"
#include "core_cmd.h"
#include "flags.h"
#include "lock_ops_init.h"
#include "atomic_ops_init.h"
#ifdef USE_DNS_CACHE
#include "dns_cache.h"
#endif
#ifdef USE_DST_BLACKLIST
#include "dst_blacklist.h"
#endif
#include "rand/fastrand.h" /* seed */
#include "stats.h"
#include "counters.h"
#include "cfg/cfg.h"
#include "cfg/cfg_struct.h"
#include "cfg_core.h"
#include "endianness.h" /* init */
#include "basex.h" /* init */
#include "pvapi_init.h" /* init */
#include "pv_core.h" /* register core pvars */
#include "ppcfg.h"
#include "sock_ut.h"
#ifdef DEBUG_DMALLOC
#include <dmalloc.h>
#endif
#include "ver.h"
/* define SIG_DEBUG by default */
#ifdef NO_SIG_DEBUG
#undef SIG_DEBUG
#else
#define SIG_DEBUG
#endif
static char help_msg[]= "\
Usage: " NAME " [options]\n\
Options:\n\
-f file Configuration file (default: " CFG_FILE ")\n\
-L path Modules search path (default: " MODS_DIR ")\n\
-c Check configuration file for errors\n\
-l address Listen on the specified address/interface (multiple -l\n\
mean listening on more addresses). The address format is\n\
[proto:]addr_lst[:port], where proto=udp|tcp|tls|sctp, \n\
addr_lst= addr|(addr, addr_lst) and \n\
addr= host|ip_address|interface_name. \n\
E.g: -l locahost, -l udp:127.0.0.1:5080, -l eth0:5062,\n\
-l \"sctp:(eth0)\", -l \"(eth0, eth1, 127.0.0.1):5065\".\n\
The default behaviour is to listen on all the interfaces.\n\
-n processes Number of child processes to fork per interface\n\
(default: 8)\n\
-r Use dns to check if is necessary to add a \"received=\"\n\
field to a via\n\
-R Same as `-r` but use reverse dns;\n\
(to use both use `-rR`)\n\
-v Turn on \"via:\" host checking when forwarding replies\n\
-d Debugging mode (multiple -d increase the level)\n\
-D no 1..do not fork (almost) anyway, 2..do not daemonize creator\n\
3..daemonize (default)\n\
-E Log to stderr\n"
#ifdef USE_TCP
" -T Disable tcp\n\
-N Number of tcp child processes (default: equal to `-n')\n\
-W type poll method (depending on support in OS, it can be: poll,\n\
epoll_lt, epoll_et, sigio_rt, select, kqueue, /dev/poll)\n"
#endif
#ifdef USE_SCTP
" -S disable sctp\n\
-Q Number of sctp child processes (default: equal to `-n')\n"
#endif /* USE_SCTP */
" -V Version number\n\
-h This help message\n\
-b nr Maximum receive buffer size which will not be exceeded by\n\
auto-probing procedure even if OS allows\n\
-m nr Size of shared memory allocated in Megabytes\n\
-w dir Change the working directory to \"dir\" (default: \"/\")\n\
-t dir Chroot to \"dir\"\n\
-u uid Change uid \n\
-g gid Change gid \n\
-P file Create a pid file\n\
-G file Create a pgid file\n\
-O nr Script optimization level (debugging option)\n\
-a mode Auto aliases mode: enable with yes or on,\n\
disable with no or off\n\
-A define Add config pre-processor define (e.g., -A WITH_AUTH)\n"
#ifdef STATS
" -s file File to which statistics is dumped (disabled otherwise)\n"
#endif
;
/* print compile-time constants */
void print_ct_constants()
{
#ifdef ADAPTIVE_WAIT
printf("ADAPTIVE_WAIT_LOOPS=%d, ", ADAPTIVE_WAIT_LOOPS);
#endif
/*
#ifdef SHM_MEM
printf("SHM_MEM_SIZE=%d, ", SHM_MEM_SIZE);
#endif
*/
printf("MAX_RECV_BUFFER_SIZE %d, MAX_LISTEN %d,"
" MAX_URI_SIZE %d, BUF_SIZE %d, PKG_SIZE %uMB\n",
MAX_RECV_BUFFER_SIZE, MAX_LISTEN, MAX_URI_SIZE,
BUF_SIZE, PKG_MEM_SIZE);
#ifdef USE_TCP
printf("poll method support: %s.\n", poll_support);
#endif
}
/* debugging function */
/*
void receive_stdin_loop()
{
#define BSIZE 1024
char buf[BSIZE+1];
int len;
while(1){
len=fread(buf,1,BSIZE,stdin);
buf[len+1]=0;
receive_msg(buf, len);
printf("-------------------------\n");
}
}
*/
/* global vars */
int own_pgid = 0; /* whether or not we have our own pgid (and it's ok
to use kill(0, sig) */
char* mods_dir = MODS_DIR; /* search path for dyn. loadable modules */
char* cfg_file = 0;
unsigned int maxbuffer = MAX_RECV_BUFFER_SIZE; /* maximum buffer size we do
not want to exceed during the
auto-probing procedure; may
be re-configured */
int children_no = 0; /* number of children processing requests */
#ifdef USE_TCP
int tcp_children_no = 0;
int tcp_disable = 0; /* 1 if tcp is disabled */
#endif
#ifdef USE_TLS
#ifdef CORE_TLS
int tls_disable = 0; /* tls enabled by default */
#else
int tls_disable = 1; /* tls disabled by default */
#endif /* CORE_TLS */
#endif /* USE_TLS */
#ifdef USE_SCTP
int sctp_children_no = 0;
int sctp_disable = 2; /* 1 if sctp is disabled, 2 if auto mode, 0 enabled */
#endif /* USE_SCTP */
struct process_table *pt=0; /*array with children pids, 0= main proc,
alloc'ed in shared mem if possible*/
int *process_count = 0; /* Total number of SER processes currently
running */
gen_lock_t* process_lock; /* lock on the process table */
int process_no = 0; /* index of process in the pt */
time_t up_since;
int sig_flag = 0; /* last signal received */
int dont_fork = 0;
int dont_daemonize = 0;
int log_stderr = 0;
/* set custom app name for syslog printing */
char *log_name = 0;
pid_t creator_pid = (pid_t) -1;
int config_check = 0;
/* check if reply first via host==us */
int check_via = 0;
/* translate user=phone URIs to TEL URIs */
int phone2tel = 1;
/* shall use stateful synonym branches? faster but not reboot-safe */
int syn_branch = 1;
/* debugging level for timer debugging */
int timerlog = L_WARN;
/* should replies include extensive warnings? by default no,
good for trouble-shooting
*/
int sip_warning = 0;
/* should localy-generated messages include server's signature?
be default yes, good for trouble-shooting
*/
int server_signature=1;
str server_hdr = {SERVER_HDR, SERVER_HDR_LEN};
str user_agent_hdr = {USER_AGENT, USER_AGENT_LEN};
/* should ser try to locate outbound interface on multihomed
* host? by default not -- too expensive
*/
int mhomed=0;
/* use dns and/or rdns or to see if we need to add
a ;received=x.x.x.x to via: */
int received_dns = 0;
/* add or not the rev dns names to aliases list */
int sr_auto_aliases=1;
char* working_dir = 0;
char* chroot_dir = 0;
char* user=0;
char* group=0;
int uid = 0;
int gid = 0;
char* sock_user=0;
char* sock_group=0;
int sock_uid= -1;
int sock_gid= -1;
int sock_mode= S_IRUSR| S_IWUSR| S_IRGRP| S_IWGRP; /* rw-rw---- */
int server_id = 0; /* Configurable unique ID of the server */
/* more config stuff */
int disable_core_dump=0; /* by default enabled */
int open_files_limit=-1; /* don't touch it by default */
/* memory options */
int shm_force_alloc=0; /* force immediate (on startup) page allocation
(by writting 0 in the pages), useful if
mlock_pages is also 1 */
int mlock_pages=0; /* default off, try to disable swapping */
/* real time options */
int real_time=0; /* default off, flags: 1 on only timer, 2 slow timer,
4 all procs (7=all) */
int rt_prio=0;
int rt_policy=0; /* SCHED_OTHER */
int rt_timer1_prio=0; /* "fast" timer */
int rt_timer2_prio=0; /* "slow" timer */
int rt_timer1_policy=0; /* "fast" timer, SCHED_OTHER */
int rt_timer2_policy=0; /* "slow" timer, SCHED_OTHER */
/* a hint to reply modules whether they should send reply
to IP advertised in Via or IP from which a request came
*/
int reply_to_via=0;
#ifdef USE_MCAST
int mcast_loopback = 0;
int mcast_ttl = -1; /* if -1, don't touch it, use the default (usually 1) */
#endif /* USE_MCAST */
int tos = IPTOS_LOWDELAY;
int pmtu_discovery = 0;
#if 0
char* names[MAX_LISTEN]; /* our names */
int names_len[MAX_LISTEN]; /* lengths of the names*/
struct ip_addr addresses[MAX_LISTEN]; /* our ips */
int addresses_no=0; /* number of names/ips */
#endif
struct socket_info* udp_listen=0;
#ifdef USE_TCP
int tcp_main_pid=0; /* set after the tcp main process is started */
struct socket_info* tcp_listen=0;
#endif
#ifdef USE_TLS
struct socket_info* tls_listen=0;
#endif
#ifdef USE_SCTP
struct socket_info* sctp_listen=0;
#endif
struct socket_info* bind_address=0; /* pointer to the crt. proc.
listening address*/
struct socket_info* sendipv4; /* ipv4 socket to use when msg. comes from ipv6*/
struct socket_info* sendipv6; /* same as above for ipv6 */
#ifdef USE_RAW_SOCKS
int raw_udp4_send_sock = -1; /* raw socket used for sending udp4 packets */
#endif /* USE_RAW_SOCKS */
#ifdef USE_TCP
struct socket_info* sendipv4_tcp;
struct socket_info* sendipv6_tcp;
#endif
#ifdef USE_TLS
struct socket_info* sendipv4_tls;
struct socket_info* sendipv6_tls;
#endif
#ifdef USE_SCTP
struct socket_info* sendipv4_sctp;
struct socket_info* sendipv6_sctp;
#endif
unsigned short port_no=0; /* default port*/
#ifdef USE_TLS
unsigned short tls_port_no=0; /* default port */
#endif
#ifdef USE_STUN
/* refresh interval in miliseconds */
unsigned int stun_refresh_interval=0;
/* stun can be switch off even if it is compiled */
int stun_allow_stun=1;
/* use or don't use fingerprint */
int stun_allow_fp=1;
#endif
struct host_alias* aliases=0; /* name aliases list */
/* Parameter to child_init */
int child_rank = 0;
/* how much to wait for children to terminate, before taking extreme measures*/
int ser_kill_timeout=DEFAULT_SER_KILL_TIMEOUT;
/* process_bm_t process_bit = 0; */
#ifdef ROUTE_SRV
#endif
/* cfg parsing */
int cfg_errors=0;
int cfg_warnings=0;
/* shared memory (in MB) */
unsigned long shm_mem_size=0;
/* export command-line to anywhere else */
int my_argc;
char **my_argv;
/* set to 1 when the cfg framework and core cfg is initialized/registered */
static int cfg_ok=0;
#define MAX_FD 32 /* maximum number of inherited open file descriptors,
(normally it shouldn't be bigger than 3) */
extern FILE* yyin;
extern int yyparse();
int is_main=1; /* flag = is this the "main" process? */
int fixup_complete=0; /* flag = is the fixup complete ? */
char* pid_file = 0; /* filename as asked by use */
char* pgid_file = 0;
/* call it before exiting; if show_status==1, mem status is displayed */
void cleanup(show_status)
{
int memlog;
/*clean-up*/
#ifndef SHM_SAFE_MALLOC
if (mem_lock)
shm_unlock(); /* hack: force-unlock the shared memory lock in case
some process crashed and let it locked; this will
allow an almost gracious shutdown */
#endif
destroy_rpcs();
destroy_modules();
#ifdef USE_DNS_CACHE
destroy_dns_cache();
#endif
#ifdef USE_DST_BLACKLIST
destroy_dst_blacklist();
#endif
/* restore the original core configuration before the
* config block is freed, otherwise even logging is unusable,
* it can case segfault */
if (cfg_ok){
cfg_update();
/* copy current config into default_core_cfg */
if (core_cfg)
default_core_cfg=*((struct cfg_group_core*)core_cfg);
}
core_cfg = &default_core_cfg;
cfg_destroy();
#ifdef USE_TCP
destroy_tcp();
#ifdef USE_TLS
destroy_tls();
#endif /* USE_TLS */
#endif /* USE_TCP */
#ifdef USE_SCTP
destroy_sctp();
#endif
destroy_timer();
destroy_pv_api();
destroy_script_cb();
destroy_nonsip_hooks();
destroy_routes();
destroy_atomic_ops();
destroy_counters();
memlog=cfg_get(core, core_cfg, memlog);
#ifdef PKG_MALLOC
if (show_status && memlog <= cfg_get(core, core_cfg, debug)){
if (cfg_get(core, core_cfg, mem_summary) & 1) {
LOG(memlog, "Memory status (pkg):\n");
pkg_status();
}
if (cfg_get(core, core_cfg, mem_summary) & 4) {
LOG(memlog, "Memory still-in-use summary (pkg):\n");
pkg_sums();
}
}
#endif
#ifdef SHM_MEM
if (pt) shm_free(pt);
pt=0;
if (show_status && memlog <= cfg_get(core, core_cfg, debug)){
if (cfg_get(core, core_cfg, mem_summary) & 2) {
LOG(memlog, "Memory status (shm):\n");
shm_status();
}
if (cfg_get(core, core_cfg, mem_summary) & 8) {
LOG(memlog, "Memory still-in-use summary (shm):\n");
shm_sums();
}
}
/* zero all shmem alloc vars that we still use */
shm_mem_destroy();
#endif
destroy_lock_ops();
if (pid_file) unlink(pid_file);
if (pgid_file) unlink(pgid_file);
}
/* tries to send a signal to all our processes
* if daemonized is ok to send the signal to all the process group,
* however if not daemonized we might end up sending the signal also
* to the shell which launched us => most signals will kill it if
* it's not in interactive mode and we don't want this. The non-daemonized
* case can occur when an error is encountered before daemonize is called
* (e.g. when parsing the config file) or when ser is started in "dont-fork"
* mode. Sending the signal to all the processes in pt[] will not work
* for processes forked from modules (which have no correspondent entry in
* pt), but this can happen only in dont_fork mode (which is only for
* debugging). So in the worst case + "dont-fork" we might leave some
* zombies. -- andrei */
static void kill_all_children(int signum)
{
int r;
if (own_pgid) kill(0, signum);
else if (pt){
/* lock processes table only if this is a child process
* (only main can add processes, so from main is safe not to lock
* and moreover it avoids the lock-holding suicidal children problem)
*/
if (!is_main) lock_get(process_lock);
for (r=1; r<*process_count; r++){
if (r==process_no) continue; /* try not to be suicidal */
if (pt[r].pid) {
kill(pt[r].pid, signum);
}
else LOG(L_CRIT, "BUG: killing: %s > %d no pid!!!\n",
pt[r].desc, pt[r].pid);
}
if (!is_main) lock_release(process_lock);
}
}
/* if this handler is called, a critical timeout has occurred while
* waiting for the children to finish => we should kill everything and exit */
static void sig_alarm_kill(int signo)
{
kill_all_children(SIGKILL); /* this will kill the whole group
including "this" process;
for debugging replace with SIGABRT
(but warning: it might generate lots
of cores) */
}
/* like sig_alarm_kill, but the timeout has occurred when cleaning up
* => try to leave a core for future diagnostics */
static void sig_alarm_abort(int signo)
{
/* LOG is not signal safe, but who cares, we are abort-ing anyway :-) */
LOG(L_CRIT, "BUG: shutdown timeout triggered, dying...");
abort();
}
static void shutdown_children(int sig, int show_status)
{
kill_all_children(sig);
if (set_sig_h(SIGALRM, sig_alarm_kill) == SIG_ERR ) {
LOG(L_ERR, "ERROR: shutdown: could not install SIGALARM handler\n");
/* continue, the process will die anyway if no
* alarm is installed which is exactly what we want */
}
alarm(ser_kill_timeout);
while((wait(0) > 0) || (errno==EINTR)); /* wait for all the
children to terminate*/
set_sig_h(SIGALRM, sig_alarm_abort);
cleanup(show_status); /* cleanup & show status*/
alarm(0);
set_sig_h(SIGALRM, SIG_IGN);
}
void handle_sigs()
{
pid_t chld;
int chld_status;
int memlog;
switch(sig_flag){
case 0: break; /* do nothing*/
case SIGPIPE:
/* SIGPIPE might be rarely received on use of
exec module; simply ignore it
*/
LOG(L_WARN, "WARNING: SIGPIPE received and ignored\n");
break;
case SIGINT:
case SIGTERM:
/* we end the program in all these cases */
if (sig_flag==SIGINT)
DBG("INT received, program terminates\n");
else
DBG("SIGTERM received, program terminates\n");
/* shutdown/kill all the children */
shutdown_children(SIGTERM, 1);
LOG(L_NOTICE, "Thank you for flying " NAME "\n");
exit(0);
break;
case SIGUSR1:
#ifdef STATS
dump_all_statistic();
#endif
memlog=cfg_get(core, core_cfg, memlog);
#ifdef PKG_MALLOC
if (memlog <= cfg_get(core, core_cfg, debug)){
if (cfg_get(core, core_cfg, mem_summary) & 1) {
LOG(memlog, "Memory status (pkg):\n");
pkg_status();
}
if (cfg_get(core, core_cfg, mem_summary) & 2) {
LOG(memlog, "Memory still-in-use summary (pkg):\n");
pkg_sums();
}
}
#endif
#ifdef SHM_MEM
if (memlog <= cfg_get(core, core_cfg, debug)){
if (cfg_get(core, core_cfg, mem_summary) & 1) {
LOG(memlog, "Memory status (shm):\n");
shm_status();
}
if (cfg_get(core, core_cfg, mem_summary) & 2) {
LOG(memlog, "Memory still-in-use summary (shm):\n");
shm_sums();
}
}
#endif
break;
case SIGCHLD:
while ((chld=waitpid( -1, &chld_status, WNOHANG ))>0) {
if (WIFEXITED(chld_status))
LOG(L_ALERT, "child process %ld exited normally,"
" status=%d\n", (long)chld,
WEXITSTATUS(chld_status));
else if (WIFSIGNALED(chld_status)) {
LOG(L_ALERT, "child process %ld exited by a signal"
" %d\n", (long)chld, WTERMSIG(chld_status));
#ifdef WCOREDUMP
LOG(L_ALERT, "core was %sgenerated\n",
WCOREDUMP(chld_status) ? "" : "not " );
#endif
}else if (WIFSTOPPED(chld_status))
LOG(L_ALERT, "child process %ld stopped by a"
" signal %d\n", (long)chld,
WSTOPSIG(chld_status));
}
#ifndef STOP_JIRIS_CHANGES
if (dont_fork) {
LOG(L_INFO, "INFO: dont_fork turned on, living on\n");
break;
}
LOG(L_INFO, "INFO: terminating due to SIGCHLD\n");
#endif
/* exit */
shutdown_children(SIGTERM, 1);
DBG("terminating due to SIGCHLD\n");
exit(0);
break;
case SIGHUP: /* ignoring it*/
DBG("SIGHUP received, ignoring it\n");
break;
default:
LOG(L_CRIT, "WARNING: unhandled signal %d\n", sig_flag);
}
sig_flag=0;
}
/* added by jku; allows for regular exit on a specific signal;
good for profiling which only works if exited regularly and
not by default signal handlers
- modified by andrei: moved most of the stuff to handle_sigs,
made it safer for the "fork" case
*/
void sig_usr(int signo)
{
#ifdef PKG_MALLOC
int memlog;
#endif
if (is_main){
if (sig_flag==0) sig_flag=signo;
else /* previous sig. not processed yet, ignoring? */
return; ;
if (dont_fork)
/* only one proc, doing everything from the sig handler,
unsafe, but this is only for debugging mode*/
handle_sigs();
}else{
/* process the important signals */
switch(signo){
case SIGPIPE:
#ifdef SIG_DEBUG /* signal unsafe stuff follows */
LOG(L_INFO, "INFO: signal %d received\n", signo);
#endif
break;
case SIGINT:
case SIGTERM:
#ifdef SIG_DEBUG /* signal unsafe stuff follows */
LOG(L_INFO, "INFO: signal %d received\n", signo);
/* print memory stats for non-main too */
#ifdef PKG_MALLOC
/* make sure we have current cfg values, but update only
the safe part (values not requiring callbacks), to
account for processes that might not have registered
config support */
cfg_update_no_cbs();
memlog=cfg_get(core, core_cfg, memlog);
if (memlog <= cfg_get(core, core_cfg, debug)){
if (cfg_get(core, core_cfg, mem_summary) & 1) {
LOG(memlog, "Memory status (pkg):\n");
pkg_status();
}
if (cfg_get(core, core_cfg, mem_summary) & 2) {
LOG(memlog, "Memory still-in-use summary (pkg):"
"\n");
pkg_sums();
}
}
#endif
#endif
_exit(0);
break;
case SIGUSR1:
/* statistics, do nothing, printed only from the main proc */
break;
/* ignored*/
case SIGUSR2:
case SIGHUP:
break;
case SIGCHLD:
#ifndef STOP_JIRIS_CHANGES
#ifdef SIG_DEBUG /* signal unsafe stuff follows */
DBG("SIGCHLD received: "
"we do not worry about grand-children\n");
#endif
#else
_exit(0); /* terminate if one child died */
#endif
break;
}
}
}
/* install the signal handlers, returns 0 on success, -1 on error */
int install_sigs()
{
/* added by jku: add exit handler */
if (set_sig_h(SIGINT, sig_usr) == SIG_ERR ) {
ERR("no SIGINT signal handler can be installed\n");
goto error;
}
/* if we debug and write to a pipe, we want to exit nicely too */
if (set_sig_h(SIGPIPE, sig_usr) == SIG_ERR ) {
ERR("no SIGINT signal handler can be installed\n");
goto error;
}
if (set_sig_h(SIGUSR1, sig_usr) == SIG_ERR ) {
ERR("no SIGUSR1 signal handler can be installed\n");
goto error;
}
if (set_sig_h(SIGCHLD , sig_usr) == SIG_ERR ) {
ERR("no SIGCHLD signal handler can be installed\n");
goto error;
}
if (set_sig_h(SIGTERM , sig_usr) == SIG_ERR ) {
ERR("no SIGTERM signal handler can be installed\n");
goto error;
}
if (set_sig_h(SIGHUP , sig_usr) == SIG_ERR ) {
ERR("no SIGHUP signal handler can be installed\n");
goto error;
}
if (set_sig_h(SIGUSR2 , sig_usr) == SIG_ERR ) {
ERR("no SIGUSR2 signal handler can be installed\n");
goto error;
}
return 0;
error:
return -1;
}
/* returns -1 on error, 0 on success
* sets proto */
static int parse_proto(unsigned char* s, long len, int* proto)
{
#define PROTO2UINT3(a, b, c) (( (((unsigned int)(a))<<16)+ \
(((unsigned int)(b))<<8)+ \
((unsigned int)(c)) ) | 0x20202020)
#define PROTO2UINT4(a, b ,c ,d) (( (((unsigned int)(a))<<24)+ \
(((unsigned int)(b))<<16)+ \
(((unsigned int)(c))<< 8)+ \
(((unsigned int)(d))) \
)| 0x20202020 )
unsigned int i;
if (likely(len==3)){
i=PROTO2UINT3(s[0], s[1], s[2]);
switch(i){
case PROTO2UINT3('u', 'd', 'p'):
*proto=PROTO_UDP;
break;
#ifdef USE_TCP
case PROTO2UINT3('t', 'c', 'p'):
*proto=PROTO_TCP;
break;
#ifdef USE_TLS
case PROTO2UINT3('t', 'l', 's'):
*proto=PROTO_TLS;
break;
#endif
#endif
default:
return -1;
}
}
#ifdef USE_SCTP
else if (likely(len==4)){
i=PROTO2UINT4(s[0], s[1], s[2], s[3]);
if (i==PROTO2UINT4('s', 'c', 't', 'p'))
*proto=PROTO_SCTP;
else
return -1;
}
#endif /* USE_SCTP */
else
return -1;
return 0;
}
static struct name_lst* mk_name_lst_elem(char* name, int name_len, int flags)
{
struct name_lst* l;
l=pkg_malloc(sizeof(struct name_lst)+name_len+1/* 0 */);
if (l){
l->name=((char*)l)+sizeof(struct name_lst);
memcpy(l->name, name, name_len);
l->name[name_len]=0;
l->flags=flags;
l->next=0;
}
return l;
}
/* free a name_lst list with elements allocated with mk_name_lst_elem
* (single block both for the structure and for the name) */
static void free_name_lst(struct name_lst* lst)
{
struct name_lst* l;
while(lst){
l=lst;
lst=lst->next;
pkg_free(l);
}
}
/* parse h and returns a name lst (flags are set to SI_IS_MHOMED if
* h contains more then one name or contains a name surrounded by '(' ')' )
* valid formats: "hostname"
* "(hostname, hostname1, hostname2)"
* "(hostname hostname1 hostname2)"
* "(hostname)"
*/
static struct name_lst* parse_name_lst(char* h, int h_len)
{
char* last;
char* p;
struct name_lst* n_lst;
struct name_lst* l;
struct name_lst** tail;
int flags;
n_lst=0;
tail=&n_lst;
last=h+h_len-1;
flags=0;
/* eat whitespace */
for(; h<=last && ((*h==' ') || (*h=='\t')); h++);
for(; last>h && ((*last==' ') || (*last=='\t')); last--);
/* catch empty strings and invalid lens */
if (h>last) goto error;
if (*h=='('){
/* list mode */
if (*last!=')' || ((h+1)>(last-1)))
goto error;
h++;
last--;
flags=SI_IS_MHOMED;
for(p=h; p<=last; p++)
switch (*p){
case ',':
case ';':
case ' ':
case '\t':
if ((int)(p-h)>0){
l=mk_name_lst_elem(h, (int)(p-h), flags);
if (l==0)
goto error;
*tail=l;
tail=&l->next;
}
h=p+1;
break;
}
}else{
/* single addr. mode */
flags=0;
p=last+1;
}
if ((int)(p-h)>0){
l=mk_name_lst_elem(h, (int)(p-h), flags);
if (l==0)
goto error;
*tail=l;
tail=&l->next;
}
return n_lst;
error:
if (n_lst) free_name_lst(n_lst);
return 0;
}
/*
* parses [proto:]host[:port] or
* [proto:](host_1, host_2, ... host_n)[:port]
* where proto= udp|tcp|tls
* returns fills proto, port, host and returns list of addresses on success
* (pkg malloc'ed) and 0 on failure
*/
/** get protocol host and port from a string representation.
* parses [proto:]host[:port] or
* [proto:](host_1, host_2, ... host_n)[:port]
* where proto= udp|tcp|tls|sctp
* @param s - string (like above)
* @param host - will be filled with the host part
* Note: for multi-homing it wil contain all the addresses
* (e.g.: "sctp:(1.2.3.4, 5.6.7.8)" => host="(1.2.3.4, 5.6.7.8)")
* @param hlen - will be filled with the length of the host part.
* @param port - will be filled with the port if present or 0 if it's not.
* @param proto - will be filled with the protocol if present or PROTO_NONE
* if it's not.
* @return fills proto, port, host and returns 0 on success and -1 on failure.
*/
int parse_phostport(char* s, char** host, int* hlen,
int* port, int* proto)
{
char* first; /* first ':' occurrence */
char* second; /* second ':' occurrence */
char* p;
int bracket;
char* tmp;
first=second=0;
bracket=0;
/* find the first 2 ':', ignoring possible ipv6 addresses
* (substrings between [])
*/
for(p=s; *p; p++){
switch(*p){
case '[':
bracket++;
if (bracket>1) goto error_brackets;
break;
case ']':
bracket--;
if (bracket<0) goto error_brackets;
break;
case ':':
if (bracket==0){
if (first==0) first=p;
else if( second==0) second=p;
else goto error_colons;
}
break;
}
}
if (p==s) return -1;
if (*(p-1)==':') goto error_colons;
if (first==0){ /* no ':' => only host */
*host=s;
*hlen=(int)(p-s);
*port=0;
*proto=0;
goto end;
}
if (second){ /* 2 ':' found => check if valid */
if (parse_proto((unsigned char*)s, first-s, proto)<0) goto error_proto;
*port=strtol(second+1, &tmp, 10);
if ((tmp==0)||(*tmp)||(tmp==second+1)) goto error_port;
*host=first+1;
*hlen=(int)(second-*host);
goto end;
}
/* only 1 ':' found => it's either proto:host or host:port */
*port=strtol(first+1, &tmp, 10);
if ((tmp==0)||(*tmp)||(tmp==first+1)){
/* invalid port => it's proto:host */
if (parse_proto((unsigned char*)s, first-s, proto)<0) goto error_proto;
*port=0;
*host=first+1;
*hlen=(int)(p-*host);
}else{
/* valid port => its host:port */
*proto=0;
*host=s;
*hlen=(int)(first-*host);
}
end:
return 0;
error_brackets:
LOG(L_ERR, "ERROR: parse_phostport: too many brackets in %s\n", s);
return -1;
error_colons:
LOG(L_ERR, "ERROR: parse_phostport: too many colons in %s\n", s);
return -1;
error_proto:
LOG(L_ERR, "ERROR: parse_phostport: bad protocol in %s\n", s);
return -1;
error_port:
LOG(L_ERR, "ERROR: parse_phostport: bad port number in %s\n", s);
return -1;
}
/** get protocol host, port and MH addresses list from a string representation.
* parses [proto:]host[:port] or
* [proto:](host_1, host_2, ... host_n)[:port]
* where proto= udp|tcp|tls|sctp
* @param s - string (like above)
* @param host - will be filled with the host part
* Note: for multi-homing it wil contain all the addresses
* (e.g.: "sctp:(1.2.3.4, 5.6.7.8)" => host="(1.2.3.4, 5.6.7.8)")
* @param hlen - will be filled with the length of the host part.
* @param port - will be filled with the port if present or 0 if it's not.
* @param proto - will be filled with the protocol if present or PROTO_NONE
* if it's not.
* @return fills proto, port, host and returns list of addresses on success
* (pkg malloc'ed) and 0 on failure
*/
static struct name_lst* parse_phostport_mh(char* s, char** host, int* hlen,
int* port, int* proto)
{
if (parse_phostport(s, host, hlen, port, proto)==0)
return parse_name_lst(*host, *hlen);
return 0;
}
/** Update \c cfg_file variable to contain full pathname. The function updates
* the value of \c cfg_file global variable to contain full absolute pathname
* to the main configuration file of SER. The function uses CFG_FILE macro to
* determine the default path to the configuration file if the user did not
* specify one using the command line option. If \c cfg_file contains an
* absolute pathname then it is used unmodified, if it contains a relative
* pathanme than the value returned by \c getcwd function will be added at the
* beginning. This function must be run before SER changes its current working
* directory to / (in daemon mode).
* @return Zero on success, negative number
* on error.
*/
int fix_cfg_file(void)
{
char* res = NULL;
size_t max_len, cwd_len, cfg_len;
if (cfg_file == NULL) cfg_file = CFG_FILE;
if (cfg_file[0] == '/') return 0;
/* cfg_file contains a relative pathname, get the current
* working directory and add it at the beginning
*/
cfg_len = strlen(cfg_file);
max_len = pathmax();
if ((res = malloc(max_len)) == NULL) goto error;
if (getcwd(res, max_len) == NULL) goto error;
cwd_len = strlen(res);
/* Make sure that the buffer is big enough */
if (cwd_len + 1 + cfg_len >= max_len) goto error;
res[cwd_len] = '/';
memcpy(res + cwd_len + 1, cfg_file, cfg_len);
res[cwd_len + 1 + cfg_len] = '\0'; /* Add terminating zero */
cfg_file = res;
return 0;
error:
fprintf(stderr, "ERROR: Unable to fix cfg_file to contain full pathname\n");
if (res) free(res);
return -1;
}
/* main loop */
int main_loop()
{
int i;
pid_t pid;
struct socket_info* si;
char si_desc[MAX_PT_DESC];
#ifdef EXTRA_DEBUG
int r;
#endif
/* one "main" process and n children handling i/o */
if (dont_fork){
#ifdef STATS
setstats( 0 );
#endif
if (udp_listen==0){
LOG(L_ERR, "ERROR: no fork mode requires at least one"
" udp listen address, exiting...\n");
goto error;
}
/* only one address, we ignore all the others */
if (udp_init(udp_listen)==-1) goto error;
bind_address=udp_listen;
if (bind_address->address.af==AF_INET) {
sendipv4=bind_address;
#ifdef USE_RAW_SOCKS
/* always try to have a raw socket opened if we are using ipv4 */
raw_udp4_send_sock = raw_socket(IPPROTO_RAW, 0, 0, 1);
if (raw_udp4_send_sock < 0) {
if ( default_core_cfg.udp4_raw > 0) {
/* force use raw socket failed */
ERR("could not initialize raw udp send socket (ipv4):"
" %s (%d)\n", strerror(errno), errno);
if (errno == EPERM)
ERR("could not initialize raw socket on startup"
" due to inadequate permissions, please"
" restart as root or with CAP_NET_RAW\n");
goto error;
}
default_core_cfg.udp4_raw = 0; /* disabled */
} else {
register_fds(1);
if (default_core_cfg.udp4_raw < 0) {
/* auto-detect => use it */
default_core_cfg.udp4_raw = 1; /* enabled */
DBG("raw socket possible => turning it on\n");
}
if (default_core_cfg.udp4_raw_ttl < 0) {
/* auto-detect */
default_core_cfg.udp4_raw_ttl = sock_get_ttl(sendipv4->socket);
if (default_core_cfg.udp4_raw_ttl < 0)
/* error, use some default value */
default_core_cfg.udp4_raw_ttl = 63;
}
}
#else
default_core_cfg.udp4_raw = 0;
#endif /* USE_RAW_SOCKS */
} else
sendipv6=bind_address;
if (udp_listen->next){
LOG(L_WARN, "WARNING: using only the first listen address"
" (no fork)\n");
}
/* delay cfg_shmize to the last moment (it must be called _before_
forking). Changes to default cfgs after this point will be
ignored.
*/
if (cfg_shmize() < 0) {
LOG(L_CRIT, "could not initialize shared configuration\n");
goto error;
}
/* Register the children that will keep updating their
* local configuration */
cfg_register_child(
1 /* main = udp listener */
+ 1 /* timer */
#ifdef USE_SLOW_TIMER
+ 1 /* slow timer */
#endif
);
if (do_suid()==-1) goto error; /* try to drop privileges */
/* process_no now initialized to zero -- increase from now on
as new processes are forked (while skipping 0 reserved for main
*/
/* init childs with rank==PROC_INIT before forking any process,
* this is a place for delayed (after mod_init) initializations
* (e.g. shared vars that depend on the total number of processes
* that is known only after all mod_inits have been executed )
* WARNING: the same init_child will be called latter, a second time
* for the "main" process with rank PROC_MAIN (make sure things are
* not initialized twice)*/
if (init_child(PROC_INIT) < 0) {
LOG(L_ERR, "ERROR: main_dontfork: init_child(PROC_INT) --"
" exiting\n");
goto error;
}
if (counters_prefork_init(get_max_procs()) == -1) goto error;
#ifdef USE_SLOW_TIMER
/* we need another process to act as the "slow" timer*/
pid = fork_process(PROC_TIMER, "slow timer", 0);
if (pid<0){
LOG(L_CRIT, "ERROR: main_loop: Cannot fork\n");
goto error;
}
if (pid==0){
/* child */
/* timer!*/
/* process_bit = 0; */
if (real_time&2)
set_rt_prio(rt_timer2_prio, rt_timer2_policy);
if (arm_slow_timer()<0) goto error;
slow_timer_main();
}else{
slow_timer_pid=pid;
}
#endif
/* we need another process to act as the "main" timer*/
pid = fork_process(PROC_TIMER, "timer", 0);
if (pid<0){
LOG(L_CRIT, "ERROR: main_loop: Cannot fork\n");
goto error;
}
if (pid==0){
/* child */
/* timer!*/
/* process_bit = 0; */
if (real_time&1)
set_rt_prio(rt_timer1_prio, rt_timer1_policy);
if (arm_timer()<0) goto error;
timer_main();
}else{
}
/* main process, receive loop */
process_no=0; /*main process number*/
pt[process_no].pid=getpid();
snprintf(pt[process_no].desc, MAX_PT_DESC,
"stand-alone receiver @ %s:%s",
bind_address->name.s, bind_address->port_no_str.s );
/* call it also w/ PROC_MAIN to make sure modules that init things
* only in PROC_MAIN get a chance to run */
if (init_child(PROC_MAIN) < 0) {
LOG(L_ERR, "ERROR: main_dontfork: init_child(PROC_MAIN) "
"-- exiting\n");
goto error;
}
/* We will call child_init even if we
* do not fork - and it will be called with rank 1 because
* in fact we behave like a child, not like main process
*/
if (init_child(1) < 0) {
LOG(L_ERR, "main_dontfork: init_child failed\n");
goto error;
}
return udp_rcv_loop();
}else{ /* fork: */
/* Register the children that will keep updating their
* local configuration. (udp/tcp/sctp listeneres
* will be added later.) */
cfg_register_child(
1 /* timer */
#ifdef USE_SLOW_TIMER
+ 1 /* slow timer */
#endif
);
for(si=udp_listen;si;si=si->next){
/* create the listening socket (for each address)*/
/* udp */
if (udp_init(si)==-1) goto error;
/* get first ipv4/ipv6 socket*/
if ((si->address.af==AF_INET)&&
((sendipv4==0)||(sendipv4->flags&(SI_IS_LO|SI_IS_MCAST))))
sendipv4=si;
#ifdef USE_IPV6
if ( ((sendipv6==0)||(sendipv6->flags&(SI_IS_LO|SI_IS_MCAST))) &&
(si->address.af==AF_INET6))
sendipv6=si;
#endif
/* children_no per each socket */
cfg_register_child(children_no);
}
#ifdef USE_RAW_SOCKS
/* always try to have a raw socket opened if we are using ipv4 */
if (sendipv4) {
raw_udp4_send_sock = raw_socket(IPPROTO_RAW, 0, 0, 1);
if (raw_udp4_send_sock < 0) {
if ( default_core_cfg.udp4_raw > 0) {
/* force use raw socket failed */
ERR("could not initialize raw udp send socket (ipv4):"
" %s (%d)\n", strerror(errno), errno);
if (errno == EPERM)
ERR("could not initialize raw socket on startup"
" due to inadequate permissions, please"
" restart as root or with CAP_NET_RAW\n");
goto error;
}
default_core_cfg.udp4_raw = 0; /* disabled */
} else {
register_fds(1);
if (default_core_cfg.udp4_raw < 0) {
/* auto-detect => use it */
default_core_cfg.udp4_raw = 1; /* enabled */
DBG("raw socket possible => turning it on\n");
}
if (default_core_cfg.udp4_raw_ttl < 0) {
/* auto-detect */
default_core_cfg.udp4_raw_ttl =
sock_get_ttl(sendipv4->socket);
if (default_core_cfg.udp4_raw_ttl < 0)
/* error, use some default value */
default_core_cfg.udp4_raw_ttl = 63;
}
}
}
#else
default_core_cfg.udp4_raw = 0;
#endif /* USE_RAW_SOCKS */
#ifdef USE_SCTP
if (!sctp_disable){
for(si=sctp_listen; si; si=si->next){
if (sctp_init_sock(si)==-1) goto error;
/* get first ipv4/ipv6 socket*/
if ((si->address.af==AF_INET) &&
((sendipv4_sctp==0) ||
(sendipv4_sctp->flags&(SI_IS_LO|SI_IS_MCAST))))
sendipv4_sctp=si;
#ifdef USE_IPV6
if( ((sendipv6_sctp==0) ||
(sendipv6_sctp->flags&(SI_IS_LO|SI_IS_MCAST))) &&
(si->address.af==AF_INET6))
sendipv6_sctp=si;
#endif
/* sctp_children_no per each socket */
cfg_register_child(sctp_children_no);
}
}
#endif /* USE_SCTP */
#ifdef USE_TCP
if (!tcp_disable){
for(si=tcp_listen; si; si=si->next){
/* same thing for tcp */
if (tcp_init(si)==-1) goto error;
/* get first ipv4/ipv6 socket*/
if ((si->address.af==AF_INET)&&
((sendipv4_tcp==0) ||
(sendipv4_tcp->flags&(SI_IS_LO|SI_IS_MCAST))))
sendipv4_tcp=si;
#ifdef USE_IPV6
if( ((sendipv6_tcp==0) ||
(sendipv6_tcp->flags&(SI_IS_LO|SI_IS_MCAST))) &&
(si->address.af==AF_INET6))
sendipv6_tcp=si;
#endif
}
/* the number of sockets does not matter */
cfg_register_child(tcp_children_no + 1 /* tcp main */);
}
#ifdef USE_TLS
if (!tls_disable && tls_has_init_si()){
for(si=tls_listen; si; si=si->next){
/* same as for tcp*/
if (tls_init(si)==-1) goto error;
/* get first ipv4/ipv6 socket*/
if ((si->address.af==AF_INET)&&
((sendipv4_tls==0) ||
(sendipv4_tls->flags&(SI_IS_LO|SI_IS_MCAST))))
sendipv4_tls=si;
#ifdef USE_IPV6
if( ((sendipv6_tls==0) ||
(sendipv6_tls->flags&(SI_IS_LO|SI_IS_MCAST))) &&
(si->address.af==AF_INET6))
sendipv6_tls=si;
#endif
}
}
#endif /* USE_TLS */
#endif /* USE_TCP */
/* all processes should have access to all the sockets (for
* sending) so we open all first*/
if (do_suid()==-1) goto error; /* try to drop privileges */
/* delay cfg_shmize to the last moment (it must be called _before_
forking). Changes to default cfgs after this point will be
ignored (cfg_shmize() will copy the default cfgs into shmem).
*/
if (cfg_shmize() < 0) {
LOG(L_CRIT, "could not initialize shared configuration\n");
goto error;
}
/* init childs with rank==PROC_INIT before forking any process,
* this is a place for delayed (after mod_init) initializations
* (e.g. shared vars that depend on the total number of processes
* that is known only after all mod_inits have been executed )
* WARNING: the same init_child will be called latter, a second time
* for the "main" process with rank PROC_MAIN (make sure things are
* not initialized twice)*/
if (init_child(PROC_INIT) < 0) {
LOG(L_ERR, "ERROR: main: error in init_child(PROC_INT) --"
" exiting\n");
goto error;
}
if (counters_prefork_init(get_max_procs()) == -1) goto error;
/* udp processes */
for(si=udp_listen; si; si=si->next){
for(i=0;i<children_no;i++){
if(si->address.af==AF_INET6) {
snprintf(si_desc, MAX_PT_DESC, "udp receiver child=%d "
"sock=[%s]:%s",
i, si->name.s, si->port_no_str.s);
} else {
snprintf(si_desc, MAX_PT_DESC, "udp receiver child=%d "
"sock=%s:%s",
i, si->name.s, si->port_no_str.s);
}
child_rank++;
pid = fork_process(child_rank, si_desc, 1);
if (pid<0){
LOG(L_CRIT, "main_loop: Cannot fork\n");
goto error;
}else if (pid==0){
/* child */
bind_address=si; /* shortcut */
#ifdef STATS
setstats( i+r*children_no );
#endif
return udp_rcv_loop();
}
}
/*parent*/
/*close(udp_sock)*/; /*if it's closed=>sendto invalid fd errors?*/
}
#ifdef USE_SCTP
/* sctp processes */
if (!sctp_disable){
for(si=sctp_listen; si; si=si->next){
for(i=0;i<sctp_children_no;i++){
if(si->address.af==AF_INET6) {
snprintf(si_desc, MAX_PT_DESC, "sctp receiver child=%d "
"sock=[%s]:%s",
i, si->name.s, si->port_no_str.s);
} else {
snprintf(si_desc, MAX_PT_DESC, "sctp receiver child=%d "
"sock=%s:%s",
i, si->name.s, si->port_no_str.s);
}
child_rank++;
pid = fork_process(child_rank, si_desc, 1);
if (pid<0){
LOG(L_CRIT, "main_loop: Cannot fork\n");
goto error;
}else if (pid==0){
/* child */
bind_address=si; /* shortcut */
#ifdef STATS
setstats( i+r*children_no );
#endif
return sctp_rcv_loop();
}
}
/*parent*/
/*close(sctp_sock)*/; /*if closed=>sendto invalid fd errors?*/
}
}
#endif /* USE_SCTP */
/*this is the main process*/
bind_address=0; /* main proc -> it shouldn't send anything, */
#ifdef USE_SLOW_TIMER
/* fork again for the "slow" timer process*/
pid = fork_process(PROC_TIMER, "slow timer", 1);
if (pid<0){
LOG(L_CRIT, "main_loop: cannot fork \"slow\" timer process\n");
goto error;
}else if (pid==0){
/* child */
if (real_time&2)
set_rt_prio(rt_timer2_prio, rt_timer2_policy);
if (arm_slow_timer()<0) goto error;
slow_timer_main();
}else{
slow_timer_pid=pid;
}
#endif /* USE_SLOW_TIMER */
/* fork again for the "main" timer process*/
pid = fork_process(PROC_TIMER, "timer", 1);
if (pid<0){
LOG(L_CRIT, "main_loop: cannot fork timer process\n");
goto error;
}else if (pid==0){
/* child */
if (real_time&1)
set_rt_prio(rt_timer1_prio, rt_timer1_policy);
if (arm_timer()<0) goto error;
timer_main();
}
/* init childs with rank==MAIN before starting tcp main (in case they want
* to fork a tcp capable process, the corresponding tcp. comm. fds in
* pt[] must be set before calling tcp_main_loop()) */
if (init_child(PROC_MAIN) < 0) {
LOG(L_ERR, "ERROR: main: error in init_child\n");
goto error;
}
#ifdef USE_TCP
if (!tcp_disable){
/* start tcp & tls receivers */
if (tcp_init_children()<0) goto error;
/* start tcp+tls master proc */
pid = fork_process(PROC_TCP_MAIN, "tcp main process", 0);
if (pid<0){
LOG(L_CRIT, "main_loop: cannot fork tcp main process: %s\n",
strerror(errno));
goto error;
}else if (pid==0){
/* child */
tcp_main_loop();
}else{
tcp_main_pid=pid;
unix_tcp_sock=-1;
}
}
#endif
/* main */
strncpy(pt[0].desc, "attendant", MAX_PT_DESC );
#ifdef USE_TCP
close_extra_socks(PROC_ATTENDANT, get_proc_no());
if(!tcp_disable){
/* main's tcp sockets are disabled by default from init_pt() */
unix_tcp_sock=-1;
}
#endif
/* init cfg, but without per child callbacks support */
cfg_child_no_cb_init();
cfg_ok=1;
#ifdef EXTRA_DEBUG
for (r=0; r<*process_count; r++){
fprintf(stderr, "% 3d % 5d - %s\n", r, pt[r].pid, pt[r].desc);
}
#endif
DBG("Expect maximum %d open fds\n", get_max_open_fds());
/* in daemonize mode send the exit code back to the parent process */
if (!dont_daemonize) {
if (daemon_status_send(0) < 0) {
ERR("error sending daemon status: %s [%d]\n",
strerror(errno), errno);
goto error;
}
}
for(;;){
handle_sigs();
pause();
cfg_update();
}
}
/*return 0; */
error:
/* if we are here, we are the "main process",
any forked children should exit with exit(-1) and not
ever use return */
return -1;
}
/*
* Calculate number of processes, this does not
* include processes created by modules
*/
static int calc_proc_no(void)
{
int udp_listeners;
struct socket_info* si;
#ifdef USE_SCTP
int sctp_listeners;
#endif
for (si=udp_listen, udp_listeners=0; si; si=si->next, udp_listeners++);
#ifdef USE_SCTP
for (si=sctp_listen, sctp_listeners=0; si; si=si->next, sctp_listeners++);
#endif
return
/* receivers and attendant */
(dont_fork ? 1 : children_no * udp_listeners + 1)
/* timer process */
+ 1 /* always, we need it in most cases, and we can't tell here
& now if we don't need it */
#ifdef USE_SLOW_TIMER
+ 1 /* slow timer process */
#endif
#ifdef USE_TCP
+((!tcp_disable)?( 1/* tcp main */ + tcp_children_no ):0)
#endif
#ifdef USE_SCTP
+((!sctp_disable)?sctp_children_no*sctp_listeners:0)
#endif
;
}
int main(int argc, char** argv)
{
FILE* cfg_stream;
int c,r;
char *tmp;
int tmp_len;
int port;
int proto;
char *options;
int ret;
unsigned int seed;
int rfd;
int debug_save, debug_flag;
int dont_fork_cnt;
struct name_lst* n_lst;
char *p;
/*init*/
time(&up_since);
creator_pid = getpid();
ret=-1;
my_argc=argc; my_argv=argv;
debug_flag=0;
dont_fork_cnt=0;
daemon_status_init();
/*init pkg mallocs (before parsing cfg or cmd line !)*/
if (init_pkg_mallocs()==-1)
goto error;
#ifdef DBG_MSG_QA
fprintf(stderr, "WARNING: ser startup: "
"DBG_MSG_QA enabled, ser may exit abruptly\n");
#endif
options= ":f:cm:dVhEb:l:L:n:vrRDTN:W:w:t:u:g:P:G:SQ:O:a:A:"
#ifdef STATS
"s:"
#endif
;
/* init counters / stats */
if (init_counters() == -1)
goto error;
#ifdef USE_TCP
init_tcp_options(); /* set the defaults before the config */
#endif
#ifdef USE_SCTP
init_sctp_options(); /* set defaults before the config */
#endif
/* look if there is a -h, e.g. -f -h construction won't catch it later */
opterr = 0;
while((c=getopt(argc,argv,options))!=-1) {
if (c == 'h' || (optarg && strcmp(optarg, "-h") == 0)) {
printf("version: %s\n", full_version);
printf("%s",help_msg);
exit(0);
break;
}
}
/* process command line (cfg. file path etc) */
optind = 1; /* reset getopt */
/* switches required before script processing */
while((c=getopt(argc,argv,options))!=-1) {
switch(c) {
case 'f':
cfg_file=optarg;
break;
case 'c':
config_check=1;
log_stderr=1; /* force stderr logging */
break;
case 'L':
mods_dir = optarg;
break;
case 'm':
shm_mem_size=strtol(optarg, &tmp, 10) * 1024 * 1024;
if (tmp &&(*tmp)){
fprintf(stderr, "bad shmem size number: -m %s\n",
optarg);
goto error;
};
LOG(L_INFO, "ser: shared memory: %ld bytes\n",
shm_mem_size );
break;
case 'd':
debug_flag = 1;
default_core_cfg.debug++;
break;
case 'V':
printf("version: %s\n", full_version);
printf("flags: %s\n", ver_flags );
print_ct_constants();
#ifdef USE_SCTP
tmp=malloc(256);
if (tmp && (sctp_check_compiled_sockopts(tmp, 256)!=0))
printf("sctp unsupported socket options: %s\n", tmp);
if (tmp) free(tmp);
#endif
printf("id: %s\n", ver_id);
printf("compiled on %s with %s\n",
ver_compiled_time, ver_compiler );
exit(0);
break;
case 'E':
log_stderr=1;
break;
case 'O':
scr_opt_lev=strtol(optarg, &tmp, 10);
if (tmp &&(*tmp)){
fprintf(stderr, "bad optimization level: -O %s\n",
optarg);
goto error;
};
break;
case 'u':
/* user needed for possible shm. pre-init */
user=optarg;
break;
case 'A':
p = strchr(optarg, '=');
if(p) {
*p = '\0';
}
if(pp_define(strlen(optarg), optarg)<0) {
fprintf(stderr, "error at define param: -A %s\n",
optarg);
goto error;
}
if(p) {
*p = '=';
p++;
if(pp_define_set(strlen(p), p)<0) {
fprintf(stderr, "error at define value: -A %s\n",
optarg);
goto error;
}
}
break;
case 'b':
case 'l':
case 'n':
case 'v':
case 'r':
case 'R':
case 'D':
case 'T':
case 'N':
case 'W':
case 'w':
case 't':
case 'g':
case 'P':
case 'G':
case 'S':
case 'Q':
case 'a':
case 's':
break;
case '?':
if (isprint(optopt)) {
fprintf(stderr, "Unknown option `-%c'."
" Use -h for help.\n", optopt);
} else {
fprintf(stderr, "Unknown option character `\\x%x'."
" Use -h for help.\n",
optopt);
}
goto error;
case ':':
fprintf(stderr, "Option `-%c' requires an argument."
" Use -h for help.\n",
optopt);
goto error;
default:
abort();
}
}
if (endianness_sanity_check() != 0){
fprintf(stderr, "BUG: endianness sanity tests failed\n");
goto error;
}
if (init_routes()<0) goto error;
if (init_nonsip_hooks()<0) goto error;
if (init_script_cb()<0) goto error;
if (init_pv_api()<0) goto error;
if (pv_register_core_vars()!=0) goto error;
if (init_rpcs()<0) goto error;
if (register_core_rpcs()!=0) goto error;
/* Fix the value of cfg_file variable.*/
if (fix_cfg_file() < 0) goto error;
/* load config file or die */
cfg_stream=fopen (cfg_file, "r");
if (cfg_stream==0){
fprintf(stderr, "ERROR: loading config file(%s): %s\n", cfg_file,
strerror(errno));
goto error;
}
/* seed the prng */
/* try to use /dev/urandom if possible */
seed=0;
if ((rfd=open("/dev/urandom", O_RDONLY))!=-1){
try_again:
if (read(rfd, (void*)&seed, sizeof(seed))==-1){
if (errno==EINTR) goto try_again; /* interrupted by signal */
LOG(L_WARN, "WARNING: could not read from /dev/urandom (%d)\n",
errno);
}
DBG("read %u from /dev/urandom\n", seed);
close(rfd);
}else{
LOG(L_WARN, "WARNING: could not open /dev/urandom (%d)\n", errno);
}
seed+=getpid()+time(0);
DBG("seeding PRNG with %u\n", seed);
srand(seed);
fastrand_seed(rand());
srandom(rand()+time(0));
DBG("test random numbers %u %lu %u\n", rand(), random(), fastrand());
/*register builtin modules*/
register_builtin_modules();
/* init named flags */
init_named_flags();
yyin=cfg_stream;
debug_save = default_core_cfg.debug;
if ((yyparse()!=0)||(cfg_errors)){
fprintf(stderr, "ERROR: bad config file (%d errors)\n", cfg_errors);
goto error;
}
if (cfg_warnings){
fprintf(stderr, "%d config warnings\n", cfg_warnings);
}
if (debug_flag) default_core_cfg.debug = debug_save;
print_rls();
/* options with higher priority than cfg file */
optind = 1; /* reset getopt */
while((c=getopt(argc,argv,options))!=-1) {
switch(c) {
case 'f':
case 'c':
case 'm':
case 'd':
case 'V':
case 'h':
case 'O':
case 'A':
break;
case 'E':
log_stderr=1; // use in both getopt switches
break;
case 'b':
maxbuffer=strtol(optarg, &tmp, 10);
if (tmp &&(*tmp)){
fprintf(stderr, "bad max buffer size number: -b %s\n",
optarg);
goto error;
}
break;
case 'l':
if ((n_lst=parse_phostport_mh(optarg, &tmp, &tmp_len,
&port, &proto))==0){
fprintf(stderr, "bad -l address specifier: %s\n",
optarg);
goto error;
}
/* add a new addr. to our address list */
if (add_listen_iface(n_lst->name, n_lst->next, port,
proto, n_lst->flags)!=0){
fprintf(stderr, "failed to add new listen address\n");
free_name_lst(n_lst);
goto error;
}
free_name_lst(n_lst);
break;
case 'n':
children_no=strtol(optarg, &tmp, 10);
if ((tmp==0) ||(*tmp)){
fprintf(stderr, "bad process number: -n %s\n",
optarg);
goto error;
}
break;
case 'v':
check_via=1;
break;
case 'r':
received_dns|=DO_DNS;
break;
case 'R':
received_dns|=DO_REV_DNS;
break;
case 'D':
dont_fork_cnt++;
break;
case 'T':
#ifdef USE_TCP
tcp_disable=1;
#else
fprintf(stderr,"WARNING: tcp support not compiled in\n");
#endif
break;
case 'N':
#ifdef USE_TCP
tcp_children_no=strtol(optarg, &tmp, 10);
if ((tmp==0) ||(*tmp)){
fprintf(stderr, "bad process number: -N %s\n",
optarg);
goto error;
}
#else
fprintf(stderr,"WARNING: tcp support not compiled in\n");
#endif
break;
case 'W':
#ifdef USE_TCP
tcp_poll_method=get_poll_type(optarg);
if (tcp_poll_method==POLL_NONE){
fprintf(stderr, "bad poll method name: -W %s\ntry "
"one of %s.\n", optarg, poll_support);
goto error;
}
#else
fprintf(stderr,"WARNING: tcp support not compiled in\n");
#endif
break;
case 'S':
#ifdef USE_SCTP
sctp_disable=1;
#else
fprintf(stderr,"WARNING: sctp support not compiled in\n");
#endif
break;
case 'Q':
#ifdef USE_SCTP
sctp_children_no=strtol(optarg, &tmp, 10);
if ((tmp==0) ||(*tmp)){
fprintf(stderr, "bad process number: -O %s\n",
optarg);
goto error;
}
#else
fprintf(stderr,"WARNING: sctp support not compiled in\n");
#endif
break;
case 'w':
working_dir=optarg;
break;
case 't':
chroot_dir=optarg;
break;
case 'u':
user=optarg;
break;
case 'g':
group=optarg;
break;
case 'P':
pid_file=optarg;
break;
case 'G':
pgid_file=optarg;
break;
case 'a':
if(strcmp(optarg, "on")==0 || strcmp(optarg, "yes")==0)
sr_auto_aliases = 1;
else if(strcmp(optarg, "off")==0 || strcmp(optarg, "no")==0)
sr_auto_aliases = 0;
else {
fprintf(stderr,
"bad auto aliases parameter: %s (valid on, off, yes, no)\n",
optarg);
goto error;
}
break;
case 's':
#ifdef STATS
stat_file=optarg;
#endif
break;
default:
break;
}
}
if (dont_fork_cnt)
dont_fork = dont_fork_cnt; /* override by command line */
if (dont_fork > 0) {
dont_daemonize = dont_fork == 2;
dont_fork = dont_fork == 1;
}
/* init locks first */
if (init_lock_ops()!=0)
goto error;
#ifdef USE_TCP
#ifdef USE_TLS
if (tcp_disable)
tls_disable=1; /* if no tcp => no tls */
#endif /* USE_TLS */
#endif /* USE_TCP */
#ifdef USE_SCTP
if (sctp_disable!=1){
/* fix it */
if (sctp_check_support()==-1){
/* check if sctp support is auto, if not warn about disabling it */
if (sctp_disable!=2){
fprintf(stderr, "ERROR: " "sctp enabled, but not supported by"
" the OS\n");
goto error;
}
sctp_disable=1;
}else{
/* sctp_disable!=1 and sctp supported => enable sctp */
sctp_disable=0;
}
}
#endif /* USE_SCTP */
/* initialize the configured proto list */
init_proto_order();
/* init the resolver, before fixing the config */
resolv_init();
/* fix parameters */
if (port_no<=0) port_no=SIP_PORT;
#ifdef USE_TLS
if (tls_port_no<=0) tls_port_no=SIPS_PORT;
#endif
if (children_no<=0) children_no=CHILD_NO;
#ifdef USE_TCP
if (!tcp_disable){
if (tcp_children_no<=0) tcp_children_no=children_no;
}
#endif
#ifdef USE_SCTP
if (!sctp_disable){
if (sctp_children_no<=0) sctp_children_no=children_no;
}
#endif
if (working_dir==0) working_dir="/";
/* get uid/gid */
if (user){
if (user2uid(&uid, &gid, user)<0){
fprintf(stderr, "bad user name/uid number: -u %s\n", user);
goto error;
}
}
if (group){
if (group2gid(&gid, group)<0){
fprintf(stderr, "bad group name/gid number: -u %s\n", group);
goto error;
}
}
if (fix_all_socket_lists()!=0){
fprintf(stderr, "failed to initialize list addresses\n");
goto error;
}
if (default_core_cfg.dns_try_ipv6 && !(socket_types & SOCKET_T_IPV6)){
/* if we are not listening on any ipv6 address => no point
* to try to resovle ipv6 addresses */
default_core_cfg.dns_try_ipv6=0;
}
/* print all the listen addresses */
printf("Listening on \n");
print_all_socket_lists();
printf("Aliases: \n");
/*print_aliases();*/
print_aliases();
printf("\n");
if (dont_fork){
fprintf(stderr, "WARNING: no fork mode %s\n",
(udp_listen)?(
(udp_listen->next)?"and more than one listen address found "
"(will use only the first one)":""
):"and no udp listen address found" );
}
if (config_check){
fprintf(stderr, "config file ok, exiting...\n");
return 0;
}
/*init shm mallocs
* this must be here
* -to allow setting shm mem size from the command line
* => if shm_mem should be settable from the cfg file move
* everything after
* -it must be also before init_timer and init_tcp
* -it must be after we know uid (so that in the SYSV sems case,
* the sems will have the correct euid)
* Note: shm can now be initialized when parsing the config script, that's
* why checking for a prior initialization is needed.
* --andrei */
#ifdef SHM_MEM
if (!shm_initialized() && init_shm()<0)
goto error;
#endif /* SHM_MEM */
if (init_atomic_ops()==-1)
goto error;
if (init_basex() != 0){
LOG(L_CRIT, "could not initialize base* framework\n");
goto error;
}
if (sr_cfg_init() < 0) {
LOG(L_CRIT, "could not initialize configuration framework\n");
goto error;
}
/* declare the core cfg before the module configs */
if (cfg_declare("core", core_cfg_def, &default_core_cfg, cfg_sizeof(core),
&core_cfg)
) {
LOG(L_CRIT, "could not declare the core configuration\n");
goto error;
}
#ifdef USE_TCP
if (tcp_register_cfg()){
LOG(L_CRIT, "could not register the tcp configuration\n");
goto error;
}
#endif /* USE_TCP */
#ifdef USE_SCTP
if (sctp_register_cfg()){
LOG(L_CRIT, "could not register the sctp configuration\n");
goto error;
}
#endif /* USE_SCTP */
/*init timer, before parsing the cfg!*/
if (init_timer()<0){
LOG(L_CRIT, "could not initialize timer, exiting...\n");
goto error;
}
#ifdef USE_DNS_CACHE
if (init_dns_cache()<0){
LOG(L_CRIT, "could not initialize the dns cache, exiting...\n");
goto error;
}
#ifdef USE_DNS_CACHE_STATS
/* preinitializing before the nubmer of processes is determined */
if (init_dns_cache_stats(1)<0){
LOG(L_CRIT, "could not initialize the dns cache measurement\n");
goto error;
}
#endif /* USE_DNS_CACHE_STATS */
#endif
#ifdef USE_DST_BLACKLIST
if (init_dst_blacklist()<0){
LOG(L_CRIT, "could not initialize the dst blacklist, exiting...\n");
goto error;
}
#ifdef USE_DST_BLACKLIST_STATS
/* preinitializing before the number of processes is determined */
if (init_dst_blacklist_stats(1)<0){
LOG(L_CRIT, "could not initialize the dst blacklist measurement\n");
goto error;
}
#endif /* USE_DST_BLACKLIST_STATS */
#endif
if (init_avps()<0) goto error;
if (rpc_init_time() < 0) goto error;
#ifdef USE_TCP
if (!tcp_disable){
/*init tcp*/
if (init_tcp()<0){
LOG(L_CRIT, "could not initialize tcp, exiting...\n");
goto error;
}
}
#endif /* USE_TCP */
#ifdef USE_SCTP
if (!sctp_disable){
if (init_sctp()<0){
LOG(L_CRIT, "Could not initialize sctp, exiting...\n");
goto error;
}
}
#endif /* USE_SCTP */
/* init_daemon? */
if( !dont_fork && daemonize((log_name==0)?argv[0]:log_name, 1) < 0)
goto error;
if (install_sigs() != 0){
fprintf(stderr, "ERROR: could not install the signal handlers\n");
goto error;
}
if (disable_core_dump) set_core_dump(0, 0);
else set_core_dump(1, shm_mem_size+PKG_MEM_POOL_SIZE+4*1024*1024);
if (open_files_limit>0){
if(increase_open_fds(open_files_limit)<0){
fprintf(stderr, "ERROR: error could not increase file limits\n");
goto error;
}
}
if (mlock_pages)
mem_lock_pages();
if (real_time&4)
set_rt_prio(rt_prio, rt_policy);
if (init_modules() != 0) {
fprintf(stderr, "ERROR: error while initializing modules\n");
goto error;
}
/* initialize process_table, add core process no. (calc_proc_no()) to the
* processes registered from the modules*/
if (init_pt(calc_proc_no())==-1)
goto error;
#ifdef USE_TCP
#ifdef USE_TLS
if (!tls_disable){
if (!tls_loaded()){
LOG(L_WARN, "WARNING: tls support enabled, but no tls engine "
" available (forgot to load the tls module?)\n");
LOG(L_WARN, "WARNING: disabling tls...\n");
tls_disable=1;
}
/* init tls*/
if (init_tls()<0){
LOG(L_CRIT, "could not initialize tls, exiting...\n");
goto error;
}
}
#endif /* USE_TLS */
#endif /* USE_TCP */
/* The total number of processes is now known, note that no
* function being called before this point may rely on the
* number of processes !
*/
DBG("Expect (at least) %d SER processes in your process list\n",
get_max_procs());
#if defined USE_DNS_CACHE && defined USE_DNS_CACHE_STATS
if (init_dns_cache_stats(get_max_procs())<0){
LOG(L_CRIT, "could not initialize the dns cache measurement\n");
goto error;
}
#endif
#if defined USE_DST_BLACKLIST && defined USE_DST_BLACKLIST_STATS
if (init_dst_blacklist_stats(get_max_procs())<0){
LOG(L_CRIT, "could not initialize the dst blacklist measurement\n");
goto error;
}
#endif
/* fix routing lists */
if ( (r=fix_rls())!=0){
fprintf(stderr, "ERROR: error %d while trying to fix configuration\n",
r);
goto error;
};
fixup_complete=1;
#ifdef STATS
if (init_stats( dont_fork ? 1 : children_no )==-1) goto error;
#endif
ret=main_loop();
if (ret < 0)
goto error;
/*kill everything*/
if (is_main) shutdown_children(SIGTERM, 0);
if (!dont_daemonize) {
if (daemon_status_send(0) < 0)
ERR("error sending exit status: %s [%d]\n",
strerror(errno), errno);
}
/* else terminate process */
return ret;
error:
/*kill everything*/
if (is_main) shutdown_children(SIGTERM, 0);
if (!dont_daemonize) {
if (daemon_status_send((char)-1) < 0)
ERR("error sending exit status: %s [%d]\n",
strerror(errno), errno);
}
return -1;
}
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