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util.c
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util.c
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/*****************************************************************************
* util.c: Utils for the multicat suite
*****************************************************************************
* Copyright (C) 2004, 2009, 2011, 2015-2016 VideoLAN
* $Id$
*
* Authors: Christophe Massiot <[email protected]>
*
* This program 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.
*
* This program 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#define _GNU_SOURCE
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <inttypes.h>
#include <string.h>
#include <errno.h>
#include <stdarg.h>
#include <sys/time.h>
#include <time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <unistd.h>
#include <sys/mman.h>
#include <netdb.h>
#include <syslog.h>
#include "util.h"
#define DEBUG_SOCKET
/*****************************************************************************
* Local declarations
*****************************************************************************/
#define MAX_MSG 1024
#define PSZ_AUX_EXT "aux"
#define PSZ_TS_EXT "ts"
int i_verbose = VERB_DBG;
static int b_syslog = 0;
/*****************************************************************************
* msg_Openlog
*****************************************************************************/
void msg_Openlog( const char *ident, int option, int facility )
{
openlog(ident, option, facility);
b_syslog = 1;
}
/*****************************************************************************
* msg_Closelog
*****************************************************************************/
void msg_Closelog( void )
{
closelog();
b_syslog = 0;
}
/*****************************************************************************
* msg_Info
*****************************************************************************/
void msg_Info( void *_unused, const char *psz_format, ... )
{
if ( i_verbose < VERB_INFO )
return;
va_list args;
va_start( args, psz_format );
if ( !b_syslog )
{
char psz_fmt[MAX_MSG];
snprintf( psz_fmt, MAX_MSG, "info: %s\n", psz_format );
vfprintf( stderr, psz_fmt, args );
}
else
{
vsyslog( LOG_INFO, psz_format, args );
}
va_end( args );
}
/*****************************************************************************
* msg_Err
*****************************************************************************/
void msg_Err( void *_unused, const char *psz_format, ... )
{
va_list args;
va_start( args, psz_format );
if ( !b_syslog )
{
char psz_fmt[MAX_MSG];
snprintf( psz_fmt, MAX_MSG, "error: %s\n", psz_format );
vfprintf( stderr, psz_fmt, args );
}
else
{
vsyslog( LOG_ERR, psz_format, args );
}
va_end( args );
}
/*****************************************************************************
* msg_Warn
*****************************************************************************/
void msg_Warn( void *_unused, const char *psz_format, ... )
{
if ( i_verbose < VERB_WARN )
return;
va_list args;
va_start( args, psz_format );
if ( !b_syslog )
{
char psz_fmt[MAX_MSG];
snprintf( psz_fmt, MAX_MSG, "warning: %s\n", psz_format );
vfprintf( stderr, psz_fmt, args );
}
else
{
vsyslog( LOG_WARNING, psz_format, args );
}
va_end( args );
}
/*****************************************************************************
* msg_Dbg
*****************************************************************************/
void msg_Dbg( void *_unused, const char *psz_format, ... )
{
if ( i_verbose < VERB_DBG )
return;
va_list args;
va_start( args, psz_format );
if ( !b_syslog )
{
char psz_fmt[MAX_MSG];
snprintf( psz_fmt, MAX_MSG, "debug: %s\n", psz_format );
vfprintf( stderr, psz_fmt, args );
}
else
{
vsyslog( LOG_DEBUG, psz_format, args );
}
va_end( args );
}
/*****************************************************************************
* msg_Raw: only used for usage()
*****************************************************************************/
void msg_Raw( void *_unused, const char *psz_format, ... )
{
va_list args;
char psz_fmt[MAX_MSG];
va_start( args, psz_format );
snprintf( psz_fmt, MAX_MSG, "%s\n", psz_format );
vfprintf( stderr, psz_fmt, args );
va_end( args );
}
/*****************************************************************************
* wall_Date/real_Date: returns a 27 MHz timestamp
*****************************************************************************/
static uint64_t _wall_Date( bool b_realtime )
{
#if defined (HAVE_CLOCK_NANOSLEEP)
struct timespec ts;
/* Try to use POSIX monotonic clock if available */
if( b_realtime || clock_gettime( CLOCK_MONOTONIC, &ts ) == -1 )
/* Run-time fallback to real-time clock (always available) */
(void)clock_gettime( CLOCK_REALTIME, &ts );
return ((uint64_t)ts.tv_sec * (uint64_t)27000000)
+ ((uint64_t)ts.tv_nsec * 27 / 1000);
#else
struct timeval tv_date;
/* gettimeofday() could return an error, and should be tested. However, the
* only possible error, according to 'man', is EFAULT, which can not happen
* here, since tv is a local variable. */
gettimeofday( &tv_date, NULL );
return( (uint64_t) tv_date.tv_sec * 27000000 + (uint64_t) tv_date.tv_usec * 27 );
#endif
}
uint64_t wall_Date( void )
{
return _wall_Date( false );
}
uint64_t real_Date( void )
{
return _wall_Date( true );
}
/*****************************************************************************
* wall_Sleep/real_Sleep
*****************************************************************************/
static void _wall_Sleep( uint64_t i_delay, bool b_realtime )
{
struct timespec ts;
ts.tv_sec = i_delay / 27000000;
ts.tv_nsec = (i_delay % 27000000) * 1000 / 27;
#if defined( HAVE_CLOCK_NANOSLEEP )
int val = EINVAL;
if ( !b_realtime )
while ( ( val = clock_nanosleep( CLOCK_MONOTONIC, 0, &ts, &ts ) ) == EINTR );
if( val == EINVAL )
{
ts.tv_sec = i_delay / 27000000;
ts.tv_nsec = (i_delay % 27000000) * 1000 / 27;
while ( clock_nanosleep( CLOCK_REALTIME, 0, &ts, &ts ) == EINTR );
}
#else
while ( nanosleep( &ts, &ts ) && errno == EINTR );
#endif
}
void wall_Sleep( uint64_t i_delay )
{
_wall_Sleep( i_delay, false );
}
void real_Sleep( uint64_t i_delay )
{
_wall_Sleep( i_delay, true );
}
/*****************************************************************************
* GetInterfaceIndex: returns the index of an interface
*****************************************************************************/
static int GetInterfaceIndex( const char *psz_name )
{
#if !defined(__APPLE__)
int i_fd;
struct ifreq ifr;
if ( (i_fd = socket( AF_INET, SOCK_DGRAM, 0 )) < 0 )
{
msg_Err( NULL, "unable to open socket (%s)", strerror(errno) );
exit(EXIT_FAILURE);
}
strncpy( ifr.ifr_name, psz_name, IFNAMSIZ );
ifr.ifr_name[IFNAMSIZ-1] = '\0';
if ( ioctl( i_fd, SIOCGIFINDEX, &ifr ) < 0 )
{
msg_Err( NULL, "unable to get interface index (%s)", strerror(errno) );
exit(EXIT_FAILURE);
}
close( i_fd );
#if defined(__FreeBSD__)
return ifr.ifr_index;
#else
return ifr.ifr_ifindex;
#endif
#else
return 0;
#endif
}
/*****************************************************************************
* PrintSocket: print socket characteristics for debug purposes
*****************************************************************************/
static void PrintSocket( const char *psz_text, sockaddr_t *p_bind,
sockaddr_t *p_connect )
{
if ( p_bind->ss.ss_family == AF_INET )
{
msg_Dbg( NULL, "%s bind:%s:%u", psz_text,
inet_ntoa(p_bind->sin.sin_addr), ntohs(p_bind->sin.sin_port) );
}
else if ( p_bind->ss.ss_family == AF_INET6 )
{
char buf[INET6_ADDRSTRLEN];
msg_Dbg( NULL, "%s bind:[%s]:%u", psz_text,
inet_ntop(AF_INET6, &p_bind->sin6.sin6_addr, buf, sizeof(buf)),
ntohs(p_bind->sin6.sin6_port) );
}
if ( p_connect->ss.ss_family == AF_INET )
{
msg_Dbg( NULL, "%s connect:%s:%u", psz_text,
inet_ntoa(p_connect->sin.sin_addr),
ntohs(p_connect->sin.sin_port) );
}
else if ( p_connect->ss.ss_family == AF_INET6 )
{
char buf[INET6_ADDRSTRLEN];
msg_Dbg( NULL, "%s connect:[%s]:%u", psz_text,
inet_ntop(AF_INET6, &p_connect->sin6.sin6_addr, buf,
sizeof(buf)),
ntohs(p_connect->sin6.sin6_port) );
}
}
/*****************************************************************************
* ParseNodeService: parse a host:port string
*****************************************************************************/
static struct addrinfo *ParseNodeService( char *_psz_string, char **ppsz_end,
uint16_t i_default_port,
int *pi_if_index )
{
int i_family = AF_INET;
char psz_port_buffer[6];
char *psz_string = strdup( _psz_string );
char *psz_node, *psz_port = NULL, *psz_end;
struct addrinfo *p_res;
struct addrinfo hint;
int i_ret;
if ( psz_string[0] == '[' )
{
i_family = AF_INET6;
psz_node = psz_string + 1;
psz_end = strchr( psz_node, ']' );
if ( psz_end == NULL )
{
msg_Warn( NULL, "invalid IPv6 address %s", _psz_string );
free( psz_string );
return NULL;
}
*psz_end++ = '\0';
char *psz_intf = strrchr( psz_node, '%' );
if ( psz_intf != NULL )
{
*psz_intf++ = '\0';
if ( pi_if_index != NULL )
*pi_if_index = GetInterfaceIndex( psz_intf );
}
}
else
{
psz_node = psz_string;
psz_end = strpbrk( psz_string, "@:,/" );
}
if ( psz_end != NULL && psz_end[0] == ':' )
{
*psz_end++ = '\0';
psz_port = psz_end;
psz_end = strpbrk( psz_port, "@:,/" );
}
if ( psz_end != NULL )
{
*psz_end = '\0';
if ( ppsz_end != NULL )
*ppsz_end = _psz_string + (psz_end - psz_string);
}
else if ( ppsz_end != NULL )
*ppsz_end = _psz_string + strlen(_psz_string);
if ( i_default_port != 0 && (psz_port == NULL || !*psz_port) )
{
sprintf( psz_port_buffer, "%u", i_default_port );
psz_port = psz_port_buffer;
}
if ( psz_node[0] == '\0' )
psz_node = "0.0.0.0";
if ( i_family != AF_INET6 )
{
/* Give a try to inet_aton because experience shows that getaddrinfo()
* fails in certain cases, like when network is down. */
struct in_addr addr;
if ( inet_aton( psz_node, &addr ) != 0 )
{
uint8_t *p_buffer = malloc( sizeof(struct addrinfo) +
sizeof(struct sockaddr_in) );
p_res = (struct addrinfo *)p_buffer;
struct sockaddr_in *p_sin =
(struct sockaddr_in *)(p_buffer + sizeof(struct addrinfo));
p_sin->sin_family = AF_INET;
if ( psz_port != NULL )
p_sin->sin_port = ntohs( atoi( psz_port ) );
else
p_sin->sin_port = 0;
p_sin->sin_addr = addr;
p_res->ai_family = AF_INET;
p_res->ai_socktype = SOCK_DGRAM;
p_res->ai_protocol = 0;
p_res->ai_addrlen = sizeof(struct sockaddr_in);
p_res->ai_addr = (struct sockaddr *)p_sin;
p_res->ai_canonname = NULL;
p_res->ai_next = NULL;
free( psz_string );
return p_res;
}
}
memset( &hint, 0, sizeof(hint) );
hint.ai_family = i_family;
hint.ai_socktype = SOCK_DGRAM;
hint.ai_protocol = 0;
hint.ai_flags = AI_PASSIVE | AI_NUMERICHOST | AI_NUMERICSERV | AI_ADDRCONFIG;
if ( (i_ret = getaddrinfo( psz_node, psz_port, &hint, &p_res )) != 0 )
{
//msg_Warn( NULL, "getaddrinfo error: %s", gai_strerror(i_ret) );
free( psz_string );
return NULL;
}
free( psz_string );
return p_res;
}
/*****************************************************************************
* RawFillHeaders - fill ip/udp headers for RAW socket
*****************************************************************************/
static void RawFillHeaders(struct udprawpkt *dgram,
in_addr_t ipsrc, in_addr_t ipdst,
uint16_t portsrc, uint16_t portdst,
uint8_t ttl, uint8_t tos, uint16_t len)
{
#ifndef __APPLE__
#if defined(__FreeBSD__)
struct ip *iph = &(dgram->iph);
#else
struct iphdr *iph = &(dgram->iph);
#endif
struct udphdr *udph = &(dgram->udph);
#ifdef DEBUG_SOCKET
char ipsrc_str[16], ipdst_str[16];
struct in_addr insrc, indst;
insrc.s_addr = ipsrc;
indst.s_addr = ipdst;
strncpy(ipsrc_str, inet_ntoa(insrc), 16);
strncpy(ipdst_str, inet_ntoa(indst), 16);
printf("Filling raw header (%p) (%s:%u -> %s:%u)\n", dgram, ipsrc_str, portsrc, ipdst_str, portdst);
#endif
#if defined(__FreeBSD__)
// Fill ip header
iph->ip_hl = 5; // ip header with no specific option
iph->ip_v = 4;
iph->ip_tos = tos;
iph->ip_len = sizeof(struct udprawpkt) + len; // auto-htoned ?
iph->ip_id = htons(0); // auto-generated if frag_off (flags) = 0 ?
iph->ip_off = 0;
iph->ip_ttl = ttl;
iph->ip_p = IPPROTO_UDP;
iph->ip_sum = 0;
iph->ip_src.s_addr = ipsrc;
iph->ip_dst.s_addr = ipdst;
// Fill udp header
udph->uh_sport = htons(portsrc);
udph->uh_dport = htons(portdst);
udph->uh_ulen = htons(sizeof(struct udphdr) + len);
udph->uh_sum = 0;
#else
// Fill ip header
iph->ihl = 5; // ip header with no specific option
iph->version = 4;
iph->tos = tos;
iph->tot_len = sizeof(struct udprawpkt) + len; // auto-htoned ?
iph->id = htons(0); // auto-generated if frag_off (flags) = 0 ?
iph->frag_off = 0;
iph->ttl = ttl;
iph->protocol = IPPROTO_UDP;
iph->check = 0;
iph->saddr = ipsrc;
iph->daddr = ipdst;
// Fill udp header
udph->source = htons(portsrc);
udph->dest = htons(portdst);
udph->len = htons(sizeof(struct udphdr) + len);
udph->check = 0;
#endif
// Compute ip header checksum. Computed by kernel when frag_off = 0 ?
//iph->check = csum((unsigned short *)iph, sizeof(struct iphdr));
#endif
}
/*****************************************************************************
* OpenSocket: parse argv and open IPv4 & IPv6 sockets
*****************************************************************************/
static char *config_stropt( char *psz_string )
{
char *ret, *tmp;
if ( !psz_string || strlen( psz_string ) == 0 )
return NULL;
ret = tmp = strdup( psz_string );
while (*tmp) {
if (*tmp == '_')
*tmp = ' ';
if (*tmp == '/') {
*tmp = '\0';
break;
}
tmp++;
}
return ret;
}
int OpenSocket( const char *_psz_arg, int i_ttl, uint16_t i_bind_port,
uint16_t i_connect_port, unsigned int *pi_weight, bool *pb_tcp,
struct opensocket_opt *p_opt)
{
sockaddr_t bind_addr, connect_addr;
int i_fd = -1, i;
char *psz_arg = strdup(_psz_arg);
char *psz_token = psz_arg;
char *psz_token2 = NULL;
int i_bind_if_index = 0, i_connect_if_index = 0;
in_addr_t i_if_addr = INADDR_ANY;
int i_tos = 0;
bool b_tcp;
struct addrinfo *p_ai;
int i_family;
socklen_t i_sockaddr_len;
bool b_host = false;
bool b_raw_packets = false;
in_addr_t i_raw_srcaddr = INADDR_ANY;
int i_raw_srcport = 0;
char *psz_ifname = NULL;
#ifdef __FreeBSD__
int hincl = 1;
#endif
bind_addr.ss.ss_family = AF_UNSPEC;
connect_addr.ss.ss_family = AF_UNSPEC;
if ( pb_tcp == NULL )
pb_tcp = &b_tcp;
*pb_tcp = false;
if ( p_opt )
{
if ( p_opt->pb_multicast )
*p_opt->pb_multicast = false;
if ( p_opt->pb_raw_packets )
*p_opt->pb_raw_packets = false;
if ( p_opt->pb_udp )
*p_opt->pb_udp = false;
}
psz_token2 = strrchr( psz_arg, ',' );
if ( psz_token2 )
{
*psz_token2++ = '\0';
if ( pi_weight )
*pi_weight = strtoul( psz_token2, NULL, 0 );
}
else if ( pi_weight )
*pi_weight = 1;
psz_token2 = strchr( psz_arg, '/' );
if ( psz_token2 )
*psz_token2 = '\0';
if ( *psz_token == '\0' )
return -1;
/* Hosts */
if ( psz_token[0] != '@' )
{
b_host = true;
p_ai = ParseNodeService( psz_token, &psz_token, i_connect_port,
&i_connect_if_index );
if ( p_ai == NULL )
return -1;
memcpy( &connect_addr.ss, p_ai->ai_addr, p_ai->ai_addrlen );
freeaddrinfo( p_ai );
}
if ( psz_token[0] == '@' )
{
psz_token++;
p_ai = ParseNodeService( psz_token, &psz_token, i_bind_port,
&i_bind_if_index );
if ( p_ai == NULL )
return -1;
memcpy( &bind_addr.ss, p_ai->ai_addr, p_ai->ai_addrlen );
freeaddrinfo( p_ai );
}
if ( bind_addr.ss.ss_family == AF_UNSPEC &&
connect_addr.ss.ss_family == AF_UNSPEC )
return -1;
#ifdef DEBUG_SOCKET
PrintSocket( "socket definition:", &bind_addr, &connect_addr );
#endif
/* opensocket optional struct */
if (p_opt) {
if (p_opt->p_raw_pktheader) {
memset(p_opt->p_raw_pktheader, 0, sizeof(struct udprawpkt));
b_raw_packets = true;
}
}
/* Weights and options */
if ( psz_token2 )
{
do
{
*psz_token2++ = '\0';
#define IS_OPTION( option ) (!strncasecmp( psz_token2, option, strlen(option) ))
#define ARG_OPTION( option ) (psz_token2 + strlen(option))
if ( IS_OPTION("ifindex=") )
i_bind_if_index = i_connect_if_index =
strtol( ARG_OPTION("ifindex="), NULL, 0 );
else if ( IS_OPTION("ifaddr=") )
{
char *option = config_stropt( ARG_OPTION("ifaddr=") );
i_if_addr = inet_addr( option );
free( option );
}
else if ( IS_OPTION("ifname=") )
{
psz_ifname = config_stropt( ARG_OPTION("ifname=") );
if (strlen(psz_ifname) >= IFNAMSIZ) {
psz_ifname[IFNAMSIZ-1] = '\0';
}
}
else if ( IS_OPTION("ttl=") )
i_ttl = strtol( ARG_OPTION("ttl="), NULL, 0 );
else if ( IS_OPTION("tos=") )
i_tos = strtol( ARG_OPTION("tos="), NULL, 0 );
else if ( IS_OPTION("tcp") )
*pb_tcp = true;
else if ( IS_OPTION("udp") )
{
if ( p_opt && p_opt->pb_udp )
*p_opt->pb_udp = true;
}
else if ( IS_OPTION("srcaddr=") )
{
char *option = config_stropt( ARG_OPTION("srcaddr=") );
i_raw_srcaddr = inet_addr( option );
free( option );
}
else if ( IS_OPTION("srcport=") )
i_raw_srcport = strtol( ARG_OPTION("srcport="), NULL, 0 );
else if ( IS_OPTION("fd=") )
i_fd = strtol( ARG_OPTION("fd="), NULL, 0 );
else
msg_Warn( NULL, "unrecognized option %s", psz_token2 );
#undef IS_OPTION
#undef ARG_OPTION
}
while ( (psz_token2 = strchr( psz_token2, '/' )) != NULL );
}
free( psz_arg );
/* Sanity checks */
if ( bind_addr.ss.ss_family != AF_UNSPEC
&& connect_addr.ss.ss_family != AF_UNSPEC
&& bind_addr.ss.ss_family != connect_addr.ss.ss_family )
{
msg_Err( NULL, "incompatible address types" );
exit(EXIT_FAILURE);
}
if ( bind_addr.ss.ss_family != AF_UNSPEC )
i_family = bind_addr.ss.ss_family;
else if ( connect_addr.ss.ss_family != AF_UNSPEC )
i_family = connect_addr.ss.ss_family;
else
{
msg_Err( NULL, "ambiguous address declaration" );
exit(EXIT_FAILURE);
}
i_sockaddr_len = (i_family == AF_INET) ? sizeof(struct sockaddr_in) :
sizeof(struct sockaddr_in6);
if ( i_bind_if_index && i_connect_if_index
&& i_bind_if_index != i_connect_if_index )
{
msg_Err( NULL, "incompatible bind and connect interfaces" );
exit(EXIT_FAILURE);
}
if ( i_connect_if_index ) i_bind_if_index = i_connect_if_index;
else i_connect_if_index = i_bind_if_index;
/* Socket configuration */
if ( i_fd < 0 )
{
if (b_raw_packets && i_raw_srcaddr != INADDR_ANY && b_host)
{
RawFillHeaders(p_opt->p_raw_pktheader,
i_raw_srcaddr, connect_addr.sin.sin_addr.s_addr, i_raw_srcport,
ntohs(connect_addr.sin.sin_port), i_ttl, i_tos, 0);
i_fd = socket( AF_INET, SOCK_RAW, IPPROTO_RAW );
if ( p_opt->pb_raw_packets != NULL )
*p_opt->pb_raw_packets = true;
#ifdef __FreeBSD__
if ( setsockopt( i_fd, IPPROTO_IP, IP_HDRINCL, &hincl, sizeof(hincl)) == -1 )
{
msg_Err( NULL, "unable to set socket (%s)", strerror(errno) );
exit(EXIT_FAILURE);
}
#endif
} else
i_fd = socket( i_family, *pb_tcp ? SOCK_STREAM : SOCK_DGRAM, 0);
if ( i_fd < 0 )
{
msg_Err( NULL, "unable to open socket (%s)", strerror(errno) );
exit(EXIT_FAILURE);
}
i = 1;
if ( setsockopt( i_fd, SOL_SOCKET, SO_REUSEADDR, (void *)&i,
sizeof(i) ) == -1 )
{
msg_Err( NULL, "unable to set socket (%s)", strerror(errno) );
exit(EXIT_FAILURE);
}
if ( i_family == AF_INET6 )
{
if ( i_bind_if_index
&& setsockopt( i_fd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
(void *)&i_bind_if_index, sizeof(i_bind_if_index) ) < 0 )
{
msg_Err( NULL, "couldn't set interface index" );
PrintSocket( "socket definition:", &bind_addr, &connect_addr );
exit(EXIT_FAILURE);
}
if ( bind_addr.ss.ss_family != AF_UNSPEC )
{
#if !defined(__APPLE__) && !defined(__FreeBSD__)
if ( IN6_IS_ADDR_MULTICAST( &bind_addr.sin6.sin6_addr ) )
{
struct ipv6_mreq imr;
sockaddr_t bind_addr_any = bind_addr;
bind_addr_any.sin6.sin6_addr = in6addr_any;
if ( bind( i_fd, &bind_addr_any.so,
sizeof(bind_addr_any) ) < 0 )
{
msg_Err( NULL, "couldn't bind" );
PrintSocket( "socket definition:", &bind_addr,
&connect_addr );
exit(EXIT_FAILURE);
}
imr.ipv6mr_multiaddr = bind_addr.sin6.sin6_addr;
imr.ipv6mr_interface = i_bind_if_index;
/* Join Multicast group without source filter */
if ( setsockopt( i_fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP,
(char *)&imr, sizeof(struct ipv6_mreq) ) < 0 )
{
msg_Err( NULL, "couldn't join multicast group" );
PrintSocket( "socket definition:", &bind_addr,
&connect_addr );
exit(EXIT_FAILURE);
}
if ( p_opt != NULL && p_opt->pb_multicast != NULL )
*p_opt->pb_multicast = true;
}
else
#endif
goto normal_bind;
}
}
else if ( bind_addr.ss.ss_family != AF_UNSPEC )
{
normal_bind:
if ( bind( i_fd, &bind_addr.so, i_sockaddr_len ) < 0 )
{
msg_Err( NULL, "couldn't bind" );
PrintSocket( "socket definition:", &bind_addr, &connect_addr );
exit(EXIT_FAILURE);
}
}
}
if ( !*pb_tcp )
{
/* Increase the receive buffer size to 1/2MB (8Mb/s during 1/2s) to
* avoid packet loss caused by scheduling problems */
i = 0x80000;
setsockopt( i_fd, SOL_SOCKET, SO_RCVBUF, (void *) &i, sizeof( i ) );
/* Join the multicast group if the socket is a multicast address */
if ( bind_addr.ss.ss_family == AF_INET
&& IN_MULTICAST( ntohl(bind_addr.sin.sin_addr.s_addr)) )
{
#ifdef IP_ADD_SOURCE_MEMBERSHIP /* unavailable on GNU Hurd */
if ( connect_addr.ss.ss_family != AF_UNSPEC )
{
/* Source-specific multicast */
struct ip_mreq_source imr;
imr.imr_multiaddr = bind_addr.sin.sin_addr;
imr.imr_interface.s_addr = i_if_addr;
imr.imr_sourceaddr = connect_addr.sin.sin_addr;
if ( i_bind_if_index )
msg_Warn( NULL, "ignoring ifindex option in SSM" );
if ( setsockopt( i_fd, IPPROTO_IP, IP_ADD_SOURCE_MEMBERSHIP,
(char *)&imr, sizeof(struct ip_mreq_source) ) < 0 )
{
msg_Err( NULL, "couldn't join multicast group (%s)",
strerror(errno) );
PrintSocket( "socket definition:", &bind_addr,
&connect_addr );
exit(EXIT_FAILURE);
}
}
else
#endif
#ifndef __FreeBSD__
if ( i_bind_if_index )
{
/* Linux-specific interface-bound multicast */
struct ip_mreqn imr;
imr.imr_multiaddr = bind_addr.sin.sin_addr;
imr.imr_address.s_addr = i_if_addr;
imr.imr_ifindex = i_bind_if_index;
if ( setsockopt( i_fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
(char *)&imr, sizeof(struct ip_mreqn) ) < 0 )
{
msg_Err( NULL, "couldn't join multicast group (%s)",
strerror(errno) );
PrintSocket( "socket definition:", &bind_addr,
&connect_addr );
exit(EXIT_FAILURE);
}
}
else
#endif
{
/* Regular multicast */
struct ip_mreq imr;
imr.imr_multiaddr = bind_addr.sin.sin_addr;
imr.imr_interface.s_addr = i_if_addr;
if ( setsockopt( i_fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
(char *)&imr, sizeof(struct ip_mreq) ) < 0 )
{
msg_Err( NULL, "couldn't join multicast group (%s)",
strerror(errno) );
PrintSocket( "socket definition:", &bind_addr,
&connect_addr );
exit(EXIT_FAILURE);
}
}
#ifdef SO_BINDTODEVICE
if (psz_ifname) {
if ( setsockopt( i_fd, SOL_SOCKET, SO_BINDTODEVICE,
psz_ifname, strlen(psz_ifname)+1 ) < 0 ) {
msg_Err( NULL, "couldn't bind to device %s (%s)",
psz_ifname, strerror(errno) );
exit(EXIT_FAILURE);
}
free(psz_ifname);
psz_ifname = NULL;
}
#endif
if ( p_opt != NULL && p_opt->pb_multicast != NULL )
*p_opt->pb_multicast = true;
}
}
if ( connect_addr.ss.ss_family != AF_UNSPEC )
{
if ( connect( i_fd, &connect_addr.so, i_sockaddr_len ) < 0 )
{
msg_Err( NULL, "cannot connect socket (%s)",
strerror(errno) );
PrintSocket( "socket definition:", &bind_addr, &connect_addr );
exit(EXIT_FAILURE);
}
if ( !*pb_tcp )
{
if ( i_family == AF_INET
&& IN_MULTICAST(ntohl(connect_addr.sin.sin_addr.s_addr)) )
{
if ( p_opt != NULL && p_opt->pb_multicast != NULL )
*p_opt->pb_multicast = true;
if ( i_ttl &&
setsockopt( i_fd, IPPROTO_IP, IP_MULTICAST_TTL,
(void *)&i_ttl, sizeof(i_ttl) ) == -1 )
{
msg_Err( NULL, "couldn't set TTL (%s)",
strerror(errno) );
PrintSocket( "socket definition:", &bind_addr,
&connect_addr );
exit(EXIT_FAILURE);
}
}
if ( i_family == AF_INET6
&& IN6_IS_ADDR_MULTICAST(&connect_addr.sin6.sin6_addr) )
{
if ( p_opt != NULL && p_opt->pb_multicast != NULL )
*p_opt->pb_multicast = true;
if ( i_ttl &&
setsockopt( i_fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
(void *)&i_ttl, sizeof(i_ttl) ) == -1 )
{
msg_Err( NULL, "couldn't set TTL (%s)",
strerror(errno) );
PrintSocket( "socket definition:", &bind_addr,
&connect_addr );
exit(EXIT_FAILURE);
}
}
if ( i_tos )
{
if ( setsockopt( i_fd, IPPROTO_IP, IP_TOS,
(void *)&i_tos, sizeof(i_tos) ) == -1 )
{
msg_Err( NULL, "couldn't set TOS (%s)", strerror(errno) );
PrintSocket( "socket definition:", &bind_addr,
&connect_addr );
exit(EXIT_FAILURE);
}
}
}
}
else if ( *pb_tcp )
{
/* Open in listen mode - wait for an incoming connection */
int i_new_fd;
if ( listen( i_fd, 1 ) < 0 )
{
msg_Err( NULL, "couldn't listen (%s)", strerror(errno) );
PrintSocket( "socket definition:", &bind_addr, &connect_addr );
exit(EXIT_FAILURE);
}
while ( (i_new_fd = accept( i_fd, NULL, NULL )) < 0 )
{
if ( errno != EINTR )
{
msg_Err( NULL, "couldn't accept (%s)", strerror(errno) );
PrintSocket( "socket definition:", &bind_addr, &connect_addr );
exit(EXIT_FAILURE);
}
}
close( i_fd );
return i_new_fd;
}
return i_fd;
}
/*****************************************************************************
* StatFile: parse argv and return the mode of the named file
*****************************************************************************/