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thttpd.c
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/* thttpd.c - tiny/turbo/throttling HTTP server
**
** Copyright © 1995,1998,1999,2000,2001,2015 by
** Jef Poskanzer <jef@mail.acme.com>. All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
** ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
** OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
** HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
** SUCH DAMAGE.
*/
#include "config.h"
#include "version.h"
#include <sys/param.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/uio.h>
#include <errno.h>
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#include <pwd.h>
#ifdef HAVE_GRP_H
#include <grp.h>
#endif
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#ifdef TIME_WITH_SYS_TIME
#include <time.h>
#endif
#include <unistd.h>
#include "fdwatch.h"
#include "libhttpd.h"
#include "mmc.h"
#include "timers.h"
#include "match.h"
#ifndef SHUT_WR
#define SHUT_WR 1
#endif
#ifndef HAVE_INT64T
typedef long long int64_t;
#endif
static char* argv0;
static int debug;
static unsigned short port;
static char* dir;
static char* data_dir;
static int do_chroot, no_log, no_symlink_check, do_vhost, do_global_passwd;
static char* cgi_pattern;
static int cgi_limit;
static char* url_pattern;
static int no_empty_referrers;
static char* local_pattern;
static char* logfile;
static char* throttlefile;
static char* hostname;
static char* pidfile;
static char* user;
static char* charset;
static char* p3p;
static int max_age;
#ifdef TCP_FASTOPEN
static int fastopen;
#endif
#ifdef USE_SCTP
static size_t send_at_once_limit;
static int use_eeor;
#endif
typedef struct {
char* pattern;
long max_limit, min_limit;
long rate;
off_t bytes_since_avg;
int num_sending;
} throttletab;
static throttletab* throttles;
static int numthrottles, maxthrottles;
#define THROTTLE_NOLIMIT -1
typedef struct {
int conn_state;
int next_free_connect;
httpd_conn* hc;
int tnums[MAXTHROTTLENUMS]; /* throttle indexes */
int numtnums;
long max_limit, min_limit;
time_t started_at, active_at;
Timer* wakeup_timer;
Timer* linger_timer;
long wouldblock_delay;
off_t bytes;
off_t end_byte_index;
off_t next_byte_index;
} connecttab;
static connecttab* connects;
static int num_connects, max_connects, first_free_connect;
static int httpd_conn_count;
/* The connection states. */
#define CNST_FREE 0
#define CNST_READING 1
#define CNST_SENDING 2
#define CNST_PAUSING 3
#define CNST_LINGERING 4
static httpd_server* hs = (httpd_server*) 0;
int terminate = 0;
time_t start_time, stats_time;
long stats_connections;
#ifdef USE_SCTP
long stats_associations;
#endif
off_t stats_bytes;
int stats_simultaneous;
static volatile int got_hup, got_usr1, watchdog_flag;
/* Forwards. */
static void parse_args( int argc, char** argv );
static void usage( void );
static void read_config( char* filename );
static void value_required( char* name, char* value );
static void no_value_required( char* name, char* value );
static char* e_strdup( char* oldstr );
static void lookup_hostname( httpd_sockaddr* sa4P, size_t sa4_len, int* gotv4P, httpd_sockaddr* sa6P, size_t sa6_len, int* gotv6P );
static void read_throttlefile( char* tf );
static void shut_down( void );
static int handle_newconnect( struct timeval* tvP, int listen_fd, int is_sctp );
static void handle_read( connecttab* c, struct timeval* tvP );
static void handle_send( connecttab* c, struct timeval* tvP );
static void handle_linger( connecttab* c, struct timeval* tvP );
static int check_throttles( connecttab* c );
static void clear_throttles( connecttab* c, struct timeval* tvP );
static void update_throttles( ClientData client_data, struct timeval* nowP );
static void finish_connection( connecttab* c, struct timeval* tvP );
static void clear_connection( connecttab* c, struct timeval* tvP );
static void really_clear_connection( connecttab* c, struct timeval* tvP );
static void idle( ClientData client_data, struct timeval* nowP );
static void wakeup_connection( ClientData client_data, struct timeval* nowP );
static void linger_clear_connection( ClientData client_data, struct timeval* nowP );
static void occasional( ClientData client_data, struct timeval* nowP );
#ifdef STATS_TIME
static void show_stats( ClientData client_data, struct timeval* nowP );
#endif /* STATS_TIME */
static void logstats( struct timeval* nowP );
static void thttpd_logstats( long secs );
/* SIGTERM and SIGINT say to exit immediately. */
static void
handle_term( int sig )
{
/* Don't need to set up the handler again, since it's a one-shot. */
shut_down();
syslog( LOG_NOTICE, "exiting due to signal %d", sig );
closelog();
exit( 1 );
}
/* SIGCHLD - a chile process exitted, so we need to reap the zombie */
static void
handle_chld( int sig )
{
const int oerrno = errno;
pid_t pid;
int status;
#ifndef HAVE_SIGSET
/* Set up handler again. */
(void) signal( SIGCHLD, handle_chld );
#endif /* ! HAVE_SIGSET */
/* Reap defunct children until there aren't any more. */
for (;;)
{
#ifdef HAVE_WAITPID
pid = waitpid( (pid_t) -1, &status, WNOHANG );
#else /* HAVE_WAITPID */
pid = wait3( &status, WNOHANG, (struct rusage*) 0 );
#endif /* HAVE_WAITPID */
if ( (int) pid == 0 ) /* none left */
break;
if ( (int) pid < 0 )
{
if ( errno == EINTR || errno == EAGAIN )
continue;
/* ECHILD shouldn't happen with the WNOHANG option,
** but with some kernels it does anyway. Ignore it.
*/
if ( errno != ECHILD )
syslog( LOG_ERR, "child wait - %m" );
break;
}
/* Decrement the CGI count. Note that this is not accurate, since
** each CGI can involve two or even three child processes.
** Decrementing for each child means that when there is heavy CGI
** activity, the count will be lower than it should be, and therefore
** more CGIs will be allowed than should be.
*/
if ( hs != (httpd_server*) 0 )
{
--hs->cgi_count;
if ( hs->cgi_count < 0 )
hs->cgi_count = 0;
}
}
/* Restore previous errno. */
errno = oerrno;
}
/* SIGHUP says to re-open the log file. */
static void
handle_hup( int sig )
{
const int oerrno = errno;
#ifndef HAVE_SIGSET
/* Set up handler again. */
(void) signal( SIGHUP, handle_hup );
#endif /* ! HAVE_SIGSET */
/* Just set a flag that we got the signal. */
got_hup = 1;
/* Restore previous errno. */
errno = oerrno;
}
/* SIGUSR1 says to exit as soon as all current connections are done. */
static void
handle_usr1( int sig )
{
/* Don't need to set up the handler again, since it's a one-shot. */
if ( num_connects == 0 )
{
/* If there are no active connections we want to exit immediately
** here. Not only is it faster, but without any connections the
** main loop won't wake up until the next new connection.
*/
shut_down();
syslog( LOG_NOTICE, "exiting" );
closelog();
exit( 0 );
}
/* Otherwise, just set a flag that we got the signal. */
got_usr1 = 1;
/* Don't need to restore old errno, since we didn't do any syscalls. */
}
/* SIGUSR2 says to generate the stats syslogs immediately. */
static void
handle_usr2( int sig )
{
const int oerrno = errno;
#ifndef HAVE_SIGSET
/* Set up handler again. */
(void) signal( SIGUSR2, handle_usr2 );
#endif /* ! HAVE_SIGSET */
logstats( (struct timeval*) 0 );
/* Restore previous errno. */
errno = oerrno;
}
/* SIGALRM is used as a watchdog. */
static void
handle_alrm( int sig )
{
const int oerrno = errno;
/* If nothing has been happening */
if ( ! watchdog_flag )
{
/* Try changing dirs to someplace we can write. */
(void) chdir( "/tmp" );
/* Dump core. */
abort();
}
watchdog_flag = 0;
#ifndef HAVE_SIGSET
/* Set up handler again. */
(void) signal( SIGALRM, handle_alrm );
#endif /* ! HAVE_SIGSET */
/* Set up alarm again. */
(void) alarm( OCCASIONAL_TIME * 3 );
/* Restore previous errno. */
errno = oerrno;
}
static void
re_open_logfile( void )
{
FILE* logfp;
if ( no_log || hs == (httpd_server*) 0 )
return;
/* Re-open the log file. */
if ( logfile != (char*) 0 && strcmp( logfile, "-" ) != 0 )
{
syslog( LOG_NOTICE, "re-opening logfile" );
logfp = fopen( logfile, "a" );
if ( logfp == (FILE*) 0 )
{
syslog( LOG_CRIT, "re-opening %.80s - %m", logfile );
return;
}
(void) fcntl( fileno( logfp ), F_SETFD, 1 );
httpd_set_logfp( hs, logfp );
}
}
int
main( int argc, char** argv )
{
char* cp;
struct passwd* pwd;
uid_t uid = 32767;
gid_t gid = 32767;
char cwd[MAXPATHLEN+1];
FILE* logfp;
int num_ready;
int cnum;
connecttab* c;
httpd_conn* hc;
httpd_sockaddr sa4;
httpd_sockaddr sa6;
int gotv4, gotv6;
struct timeval tv;
argv0 = argv[0];
cp = strrchr( argv0, '/' );
if ( cp != (char*) 0 )
++cp;
else
cp = argv0;
openlog( cp, LOG_NDELAY|LOG_PID, LOG_FACILITY );
/* Handle command-line arguments. */
parse_args( argc, argv );
/* Read zone info now, in case we chroot(). */
tzset();
/* Look up hostname now, in case we chroot(). */
lookup_hostname( &sa4, sizeof(sa4), &gotv4, &sa6, sizeof(sa6), &gotv6 );
if ( ! ( gotv4 || gotv6 ) )
{
syslog( LOG_ERR, "can't find any valid address" );
(void) fprintf( stderr, "%s: can't find any valid address\n", argv0 );
exit( 1 );
}
/* Throttle file. */
numthrottles = 0;
maxthrottles = 0;
throttles = (throttletab*) 0;
if ( throttlefile != (char*) 0 )
read_throttlefile( throttlefile );
/* If we're root and we're going to become another user, get the uid/gid
** now.
*/
if ( getuid() == 0 )
{
pwd = getpwnam( user );
if ( pwd == (struct passwd*) 0 )
{
syslog( LOG_CRIT, "unknown user - '%.80s'", user );
(void) fprintf( stderr, "%s: unknown user - '%s'\n", argv0, user );
exit( 1 );
}
uid = pwd->pw_uid;
gid = pwd->pw_gid;
}
/* Log file. */
if ( logfile != (char*) 0 )
{
if ( strcmp( logfile, "/dev/null" ) == 0 )
{
no_log = 1;
logfp = (FILE*) 0;
}
else if ( strcmp( logfile, "-" ) == 0 )
logfp = stdout;
else
{
logfp = fopen( logfile, "a" );
if ( logfp == (FILE*) 0 )
{
syslog( LOG_CRIT, "%.80s - %m", logfile );
perror( logfile );
exit( 1 );
}
if ( logfile[0] != '/' )
{
syslog( LOG_WARNING, "logfile is not an absolute path, you may not be able to re-open it" );
(void) fprintf( stderr, "%s: logfile is not an absolute path, you may not be able to re-open it\n", argv0 );
}
(void) fcntl( fileno( logfp ), F_SETFD, 1 );
if ( getuid() == 0 )
{
/* If we are root then we chown the log file to the user we'll
** be switching to.
*/
if ( fchown( fileno( logfp ), uid, gid ) < 0 )
{
syslog( LOG_WARNING, "fchown logfile - %m" );
perror( "fchown logfile" );
}
}
}
}
else
logfp = (FILE*) 0;
/* Switch directories if requested. */
if ( dir != (char*) 0 )
{
if ( chdir( dir ) < 0 )
{
syslog( LOG_CRIT, "chdir - %m" );
perror( "chdir" );
exit( 1 );
}
}
#ifdef USE_USER_DIR
else if ( getuid() == 0 )
{
/* No explicit directory was specified, we're root, and the
** USE_USER_DIR option is set - switch to the specified user's
** home dir.
*/
if ( chdir( pwd->pw_dir ) < 0 )
{
syslog( LOG_CRIT, "chdir - %m" );
perror( "chdir" );
exit( 1 );
}
}
#endif /* USE_USER_DIR */
/* Get current directory. */
(void) getcwd( cwd, sizeof(cwd) - 1 );
if ( cwd[strlen( cwd ) - 1] != '/' )
(void) strcat( cwd, "/" );
if ( ! debug )
{
/* We're not going to use stdin stdout or stderr from here on, so close
** them to save file descriptors.
*/
(void) fclose( stdin );
if ( logfp != stdout )
(void) fclose( stdout );
(void) fclose( stderr );
/* Daemonize - make ourselves a subprocess. */
#ifdef HAVE_DAEMON
if ( daemon( 1, 1 ) < 0 )
{
syslog( LOG_CRIT, "daemon - %m" );
exit( 1 );
}
#else /* HAVE_DAEMON */
switch ( fork() )
{
case 0:
break;
case -1:
syslog( LOG_CRIT, "fork - %m" );
exit( 1 );
default:
exit( 0 );
}
#ifdef HAVE_SETSID
(void) setsid();
#endif /* HAVE_SETSID */
#endif /* HAVE_DAEMON */
}
else
{
/* Even if we don't daemonize, we still want to disown our parent
** process.
*/
#ifdef HAVE_SETSID
(void) setsid();
#endif /* HAVE_SETSID */
}
if ( pidfile != (char*) 0 )
{
/* Write the PID file. */
FILE* pidfp = fopen( pidfile, "w" );
if ( pidfp == (FILE*) 0 )
{
syslog( LOG_CRIT, "%.80s - %m", pidfile );
exit( 1 );
}
(void) fprintf( pidfp, "%d\n", (int) getpid() );
(void) fclose( pidfp );
}
/* Initialize the fdwatch package. Have to do this before chroot,
** if /dev/poll is used.
*/
max_connects = fdwatch_get_nfiles();
if ( max_connects < 0 )
{
syslog( LOG_CRIT, "fdwatch initialization failure" );
exit( 1 );
}
max_connects -= SPARE_FDS;
/* Chroot if requested. */
if ( do_chroot )
{
if ( chroot( cwd ) < 0 )
{
syslog( LOG_CRIT, "chroot - %m" );
perror( "chroot" );
exit( 1 );
}
/* If we're logging and the logfile's pathname begins with the
** chroot tree's pathname, then elide the chroot pathname so
** that the logfile pathname still works from inside the chroot
** tree.
*/
if ( logfile != (char*) 0 && strcmp( logfile, "-" ) != 0 )
{
if ( strncmp( logfile, cwd, strlen( cwd ) ) == 0 )
{
(void) ol_strcpy( logfile, &logfile[strlen( cwd ) - 1] );
/* (We already guaranteed that cwd ends with a slash, so leaving
** that slash in logfile makes it an absolute pathname within
** the chroot tree.)
*/
}
else
{
syslog( LOG_WARNING, "logfile is not within the chroot tree, you will not be able to re-open it" );
(void) fprintf( stderr, "%s: logfile is not within the chroot tree, you will not be able to re-open it\n", argv0 );
}
}
(void) strcpy( cwd, "/" );
/* Always chdir to / after a chroot. */
if ( chdir( cwd ) < 0 )
{
syslog( LOG_CRIT, "chroot chdir - %m" );
perror( "chroot chdir" );
exit( 1 );
}
}
/* Switch directories again if requested. */
if ( data_dir != (char*) 0 )
{
if ( chdir( data_dir ) < 0 )
{
syslog( LOG_CRIT, "data_dir chdir - %m" );
perror( "data_dir chdir" );
exit( 1 );
}
}
/* Set up to catch signals. */
#ifdef HAVE_SIGSET
(void) sigset( SIGTERM, handle_term );
(void) sigset( SIGINT, handle_term );
(void) sigset( SIGCHLD, handle_chld );
(void) sigset( SIGPIPE, SIG_IGN ); /* get EPIPE instead */
(void) sigset( SIGHUP, handle_hup );
(void) sigset( SIGUSR1, handle_usr1 );
(void) sigset( SIGUSR2, handle_usr2 );
(void) sigset( SIGALRM, handle_alrm );
#else /* HAVE_SIGSET */
(void) signal( SIGTERM, handle_term );
(void) signal( SIGINT, handle_term );
(void) signal( SIGCHLD, handle_chld );
(void) signal( SIGPIPE, SIG_IGN ); /* get EPIPE instead */
(void) signal( SIGHUP, handle_hup );
(void) signal( SIGUSR1, handle_usr1 );
(void) signal( SIGUSR2, handle_usr2 );
(void) signal( SIGALRM, handle_alrm );
#endif /* HAVE_SIGSET */
got_hup = 0;
got_usr1 = 0;
watchdog_flag = 0;
(void) alarm( OCCASIONAL_TIME * 3 );
/* Initialize the timer package. */
tmr_init();
/* Initialize the HTTP layer. Got to do this before giving up root,
** so that we can bind to a privileged port.
*/
hs = httpd_initialize(
hostname,
gotv4 ? &sa4 : (httpd_sockaddr*) 0, gotv6 ? &sa6 : (httpd_sockaddr*) 0,
port, cgi_pattern, cgi_limit, charset, p3p, max_age, cwd, no_log, logfp,
#ifdef TCP_FASTOPEN
fastopen,
#endif
#ifdef USE_SCTP
send_at_once_limit, use_eeor,
#endif
no_symlink_check, do_vhost, do_global_passwd, url_pattern,
local_pattern, no_empty_referrers );
if ( hs == (httpd_server*) 0 )
exit( 1 );
/* Set up the occasional timer. */
if ( tmr_create( (struct timeval*) 0, occasional, JunkClientData, OCCASIONAL_TIME * 1000L, 1 ) == (Timer*) 0 )
{
syslog( LOG_CRIT, "tmr_create(occasional) failed" );
exit( 1 );
}
/* Set up the idle timer. */
if ( tmr_create( (struct timeval*) 0, idle, JunkClientData, 5 * 1000L, 1 ) == (Timer*) 0 )
{
syslog( LOG_CRIT, "tmr_create(idle) failed" );
exit( 1 );
}
if ( numthrottles > 0 )
{
/* Set up the throttles timer. */
if ( tmr_create( (struct timeval*) 0, update_throttles, JunkClientData, THROTTLE_TIME * 1000L, 1 ) == (Timer*) 0 )
{
syslog( LOG_CRIT, "tmr_create(update_throttles) failed" );
exit( 1 );
}
}
#ifdef STATS_TIME
/* Set up the stats timer. */
if ( tmr_create( (struct timeval*) 0, show_stats, JunkClientData, STATS_TIME * 1000L, 1 ) == (Timer*) 0 )
{
syslog( LOG_CRIT, "tmr_create(show_stats) failed" );
exit( 1 );
}
#endif /* STATS_TIME */
start_time = stats_time = time( (time_t*) 0 );
stats_connections = 0;
#ifdef USE_SCTP
stats_associations = 0;
#endif
stats_bytes = 0;
stats_simultaneous = 0;
/* If we're root, try to become someone else. */
if ( getuid() == 0 )
{
/* Set aux groups to null. */
if ( setgroups( 0, (const gid_t*) 0 ) < 0 )
{
syslog( LOG_CRIT, "setgroups - %m" );
exit( 1 );
}
/* Set primary group. */
if ( setgid( gid ) < 0 )
{
syslog( LOG_CRIT, "setgid - %m" );
exit( 1 );
}
/* Try setting aux groups correctly - not critical if this fails. */
if ( initgroups( user, gid ) < 0 )
syslog( LOG_WARNING, "initgroups - %m" );
#ifdef HAVE_SETLOGIN
/* Set login name. */
(void) setlogin( user );
#endif /* HAVE_SETLOGIN */
/* Set uid. */
if ( setuid( uid ) < 0 )
{
syslog( LOG_CRIT, "setuid - %m" );
exit( 1 );
}
/* Check for unnecessary security exposure. */
if ( ! do_chroot )
syslog(
LOG_WARNING,
"started as root without requesting chroot(), warning only" );
}
/* Initialize our connections table. */
connects = NEW( connecttab, max_connects );
if ( connects == (connecttab*) 0 )
{
syslog( LOG_CRIT, "out of memory allocating a connecttab" );
exit( 1 );
}
for ( cnum = 0; cnum < max_connects; ++cnum )
{
connects[cnum].conn_state = CNST_FREE;
connects[cnum].next_free_connect = cnum + 1;
connects[cnum].hc = (httpd_conn*) 0;
}
connects[max_connects - 1].next_free_connect = -1; /* end of link list */
first_free_connect = 0;
num_connects = 0;
httpd_conn_count = 0;
if ( hs != (httpd_server*) 0 )
{
if ( hs->listen4_fd != -1 )
fdwatch_add_fd( hs->listen4_fd, (void*) 0, FDW_READ );
if ( hs->listen6_fd != -1 )
fdwatch_add_fd( hs->listen6_fd, (void*) 0, FDW_READ );
#ifdef USE_SCTP
if ( hs->listensctp_fd != -1 )
fdwatch_add_fd( hs->listensctp_fd, (void*) 0, FDW_READ );
#endif
}
/* Main loop. */
(void) gettimeofday( &tv, (struct timezone*) 0 );
while ( ( ! terminate ) || num_connects > 0 )
{
/* Do we need to re-open the log file? */
if ( got_hup )
{
re_open_logfile();
got_hup = 0;
}
/* Do the fd watch. */
num_ready = fdwatch( tmr_mstimeout( &tv ) );
if ( num_ready < 0 )
{
if ( errno == EINTR || errno == EAGAIN )
continue; /* try again */
syslog( LOG_ERR, "fdwatch - %m" );
exit( 1 );
}
(void) gettimeofday( &tv, (struct timezone*) 0 );
if ( num_ready == 0 )
{
/* No fd's are ready - run the timers. */
tmr_run( &tv );
continue;
}
/* Is it a new connection? */
if ( hs != (httpd_server*) 0 && hs->listen6_fd != -1 &&
fdwatch_check_fd( hs->listen6_fd ) )
{
if ( handle_newconnect( &tv, hs->listen6_fd, 0 ) )
/* Go around the loop and do another fdwatch, rather than
** dropping through and processing existing connections.
** New connections always get priority.
*/
continue;
}
if ( hs != (httpd_server*) 0 && hs->listen4_fd != -1 &&
fdwatch_check_fd( hs->listen4_fd ) )
{
if ( handle_newconnect( &tv, hs->listen4_fd, 0 ) )
/* Go around the loop and do another fdwatch, rather than
** dropping through and processing existing connections.
** New connections always get priority.
*/
continue;
}
#ifdef USE_SCTP
if ( hs != (httpd_server*) 0 && hs->listensctp_fd != -1 &&
fdwatch_check_fd( hs->listensctp_fd ) )
{
if ( handle_newconnect( &tv, hs->listensctp_fd, 1 ) )
/* Go around the loop and do another fdwatch, rather than
** dropping through and processing existing connections.
** New connections always get priority.
*/
continue;
}
#endif
/* Find the connections that need servicing. */
while ( ( c = (connecttab*) fdwatch_get_next_client_data() ) != (connecttab*) -1 )
{
if ( c == (connecttab*) 0 )
continue;
hc = c->hc;
if ( ! fdwatch_check_fd( hc->conn_fd ) )
/* Something went wrong. */
clear_connection( c, &tv );
else
switch ( c->conn_state )
{
case CNST_READING: handle_read( c, &tv ); break;
case CNST_SENDING: handle_send( c, &tv ); break;
case CNST_LINGERING: handle_linger( c, &tv ); break;
}
}
tmr_run( &tv );
if ( got_usr1 && ! terminate )
{
terminate = 1;
if ( hs != (httpd_server*) 0 )
{
if ( hs->listen4_fd != -1 )
fdwatch_del_fd( hs->listen4_fd );
if ( hs->listen6_fd != -1 )
fdwatch_del_fd( hs->listen6_fd );
#ifdef USE_SCTP
if ( hs->listensctp_fd != -1 )
fdwatch_del_fd( hs->listensctp_fd );
#endif
httpd_unlisten( hs );
}
}
}
/* The main loop terminated. */
shut_down();
syslog( LOG_NOTICE, "exiting" );
closelog();
exit( 0 );
}
static void
parse_args( int argc, char** argv )
{
int argn;
debug = 0;
port = DEFAULT_PORT;
dir = (char*) 0;
data_dir = (char*) 0;
#ifdef ALWAYS_CHROOT
do_chroot = 1;
#else /* ALWAYS_CHROOT */
do_chroot = 0;
#endif /* ALWAYS_CHROOT */
no_log = 0;
no_symlink_check = do_chroot;
#ifdef ALWAYS_VHOST
do_vhost = 1;
#else /* ALWAYS_VHOST */
do_vhost = 0;
#endif /* ALWAYS_VHOST */
#ifdef ALWAYS_GLOBAL_PASSWD
do_global_passwd = 1;
#else /* ALWAYS_GLOBAL_PASSWD */
do_global_passwd = 0;
#endif /* ALWAYS_GLOBAL_PASSWD */
#ifdef CGI_PATTERN
cgi_pattern = CGI_PATTERN;
#else /* CGI_PATTERN */
cgi_pattern = (char*) 0;
#endif /* CGI_PATTERN */
#ifdef CGI_LIMIT
cgi_limit = CGI_LIMIT;
#else /* CGI_LIMIT */
cgi_limit = 0;
#endif /* CGI_LIMIT */
url_pattern = (char*) 0;
no_empty_referrers = 0;
local_pattern = (char*) 0;
throttlefile = (char*) 0;
hostname = (char*) 0;
logfile = (char*) 0;
pidfile = (char*) 0;
user = DEFAULT_USER;
charset = DEFAULT_CHARSET;
p3p = "";
max_age = -1;
#ifdef TCP_FASTOPEN
fastopen = 0;
#endif
#ifdef USE_SCTP
send_at_once_limit = 0;
#ifdef SCTP_EXPLICIT_EOR
use_eeor = 1;
#else
use_eeor = 0;
#endif
#endif
argn = 1;
while ( argn < argc && argv[argn][0] == '-' )
{
if ( strcmp( argv[argn], "-V" ) == 0 )
{
(void) printf( "%s\n", SERVER_SOFTWARE );
exit( 0 );
}
else if ( strcmp( argv[argn], "-C" ) == 0 && argn + 1 < argc )
{
++argn;
read_config( argv[argn] );
}
else if ( strcmp( argv[argn], "-p" ) == 0 && argn + 1 < argc )
{
++argn;
port = (unsigned short) atoi( argv[argn] );
}
else if ( strcmp( argv[argn], "-d" ) == 0 && argn + 1 < argc )
{
++argn;
dir = argv[argn];
}
else if ( strcmp( argv[argn], "-r" ) == 0 )
{
do_chroot = 1;
no_symlink_check = 1;
}
else if ( strcmp( argv[argn], "-nor" ) == 0 )
{
do_chroot = 0;
no_symlink_check = 0;
}
else if ( strcmp( argv[argn], "-dd" ) == 0 && argn + 1 < argc )
{
++argn;
data_dir = argv[argn];
}
else if ( strcmp( argv[argn], "-s" ) == 0 )
no_symlink_check = 0;
else if ( strcmp( argv[argn], "-nos" ) == 0 )
no_symlink_check = 1;
else if ( strcmp( argv[argn], "-u" ) == 0 && argn + 1 < argc )
{
++argn;
user = argv[argn];
}
else if ( strcmp( argv[argn], "-c" ) == 0 && argn + 1 < argc )
{
++argn;
cgi_pattern = argv[argn];
}
else if ( strcmp( argv[argn], "-t" ) == 0 && argn + 1 < argc )
{
++argn;
throttlefile = argv[argn];
}
else if ( strcmp( argv[argn], "-h" ) == 0 && argn + 1 < argc )
{
++argn;
hostname = argv[argn];
}
else if ( strcmp( argv[argn], "-l" ) == 0 && argn + 1 < argc )
{
++argn;
logfile = argv[argn];
}
else if ( strcmp( argv[argn], "-v" ) == 0 )
do_vhost = 1;