move tr_getDefaultRoute() to natpmp.c because it's the only code that uses it
This commit is contained in:
Charles Kerr
parent
c3c4b699b9
commit
07f2e6365a
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@ -28,6 +28,9 @@
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#include <string.h>
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#include <time.h>
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#include <unistd.h> /* close */
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#include <fcntl.h> /* fcntl */
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#ifdef __BEOS__
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#include <netdb.h>
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#endif
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@ -37,7 +40,6 @@
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#include "transmission.h"
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#include "natpmp.h"
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#include "net.h"
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#include "platform.h" /* tr_getDefaultRoute() */
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#include "utils.h"
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#define PMP_PORT 5351
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@ -64,6 +66,8 @@
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#define PMP_FROMBUF16( buf ) ( htons( *( (uint16_t *) (buf) ) ) )
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#define PMP_FROMBUF32( buf ) ( htonl( *( (uint32_t *) (buf) ) ) )
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static int tr_getDefaultRoute( struct in_addr * addr );
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typedef struct tr_natpmp_uptime_s
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{
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time_t when;
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@ -821,3 +825,381 @@ parseresponse( uint8_t * buf, int len, int port, tr_natpmp_parse_t * parse )
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return TR_NET_OK;
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}
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/***
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**** tr_getDefaultRoute()
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***/
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#ifdef BSD
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netinet/in.h> /* struct in_addr */
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#include <sys/sysctl.h>
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#include <net/route.h>
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static uint8_t *
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getroute( int * buflen );
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static int
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parseroutes( uint8_t * buf, int len, struct in_addr * addr );
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static int
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tr_getDefaultRoute( struct in_addr * addr )
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{
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uint8_t * buf;
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int len;
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buf = getroute( &len );
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if( NULL == buf )
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{
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tr_err( "failed to get default route (BSD)" );
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return 1;
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}
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len = parseroutes( buf, len, addr );
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free( buf );
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return len;
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}
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#ifndef SA_SIZE
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#define ROUNDUP( a, size ) \
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( ( (a) & ( (size) - 1 ) ) ? ( 1 + ( (a) | ( (size) - 1 ) ) ) : (a) )
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#define SA_SIZE( sap ) \
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( sap->sa_len ? ROUNDUP( (sap)->sa_len, sizeof( u_long ) ) : \
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sizeof( u_long ) )
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#endif /* !SA_SIZE */
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#define NEXT_SA( sap ) \
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(struct sockaddr *) ( (caddr_t) (sap) + ( SA_SIZE( (sap) ) ) )
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static uint8_t *
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getroute( int * buflen )
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{
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int mib[6];
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size_t len;
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uint8_t * buf;
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mib[0] = CTL_NET;
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mib[1] = PF_ROUTE;
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mib[2] = 0;
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mib[3] = AF_INET;
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mib[4] = NET_RT_FLAGS;
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mib[5] = RTF_GATEWAY;
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if( sysctl( mib, 6, NULL, &len, NULL, 0 ) )
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{
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if( ENOENT != errno )
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{
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tr_err( "sysctl net.route.0.inet.flags.gateway failed (%s)",
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strerror( sockerrno ) );
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}
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*buflen = 0;
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return NULL;
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}
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buf = malloc( len );
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if( NULL == buf )
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{
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*buflen = 0;
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return NULL;
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}
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if( sysctl( mib, 6, buf, &len, NULL, 0 ) )
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{
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tr_err( "sysctl net.route.0.inet.flags.gateway failed (%s)",
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strerror( sockerrno ) );
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free( buf );
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*buflen = 0;
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return NULL;
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}
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*buflen = len;
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return buf;
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}
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static int
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parseroutes( uint8_t * buf, int len, struct in_addr * addr )
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{
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uint8_t * end;
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struct rt_msghdr * rtm;
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struct sockaddr * sa;
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struct sockaddr_in * sin;
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int ii;
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struct in_addr dest, gw;
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end = buf + len;
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while( end > buf + sizeof( *rtm ) )
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{
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rtm = (struct rt_msghdr *) buf;
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buf += rtm->rtm_msglen;
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if( end >= buf )
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{
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dest.s_addr = INADDR_NONE;
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gw.s_addr = INADDR_NONE;
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sa = (struct sockaddr *) ( rtm + 1 );
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for( ii = 0; ii < RTAX_MAX && (uint8_t *) sa < buf; ii++ )
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{
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if( buf < (uint8_t *) NEXT_SA( sa ) )
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{
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break;
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}
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if( rtm->rtm_addrs & ( 1 << ii ) )
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{
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if( AF_INET == sa->sa_family )
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{
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sin = (struct sockaddr_in *) sa;
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switch( ii )
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{
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case RTAX_DST:
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dest = sin->sin_addr;
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break;
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case RTAX_GATEWAY:
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gw = sin->sin_addr;
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break;
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}
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}
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sa = NEXT_SA( sa );
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}
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}
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if( INADDR_ANY == dest.s_addr && INADDR_NONE != gw.s_addr )
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{
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*addr = gw;
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return 0;
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}
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}
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}
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return 1;
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}
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#elif defined( linux ) || defined( __linux ) || defined( __linux__ )
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#include <linux/types.h>
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#include <linux/netlink.h>
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#include <linux/rtnetlink.h>
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#define SEQNUM 195909
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static int
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getsock( void );
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static uint8_t *
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getroute( int fd, unsigned int * buflen );
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static int
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parseroutes( uint8_t * buf, unsigned int len, struct in_addr * addr );
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int
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tr_getDefaultRoute( struct in_addr * addr )
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{
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int fd, ret;
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unsigned int len;
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uint8_t * buf;
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ret = 1;
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fd = getsock();
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if( 0 <= fd )
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{
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while( ret )
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{
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buf = getroute( fd, &len );
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if( NULL == buf )
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{
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break;
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}
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ret = parseroutes( buf, len, addr );
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free( buf );
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}
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close( fd );
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}
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if( ret )
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{
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tr_err( "failed to get default route (Linux)" );
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}
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return ret;
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}
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static int
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getsock( void )
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{
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int fd, flags;
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struct
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{
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struct nlmsghdr nlh;
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struct rtgenmsg rtg;
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} req;
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struct sockaddr_nl snl;
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fd = socket( PF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE );
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if( 0 > fd )
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{
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tr_err( "failed to create routing socket (%s)", strerror( sockerrno ) );
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return -1;
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}
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flags = fcntl( fd, F_GETFL );
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if( 0 > flags || 0 > fcntl( fd, F_SETFL, O_NONBLOCK | flags ) )
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{
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tr_err( "failed to set socket nonblocking (%s)", strerror( sockerrno ) );
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close( fd );
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return -1;
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}
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bzero( &snl, sizeof( snl ) );
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snl.nl_family = AF_NETLINK;
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bzero( &req, sizeof( req ) );
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req.nlh.nlmsg_len = NLMSG_LENGTH( sizeof( req.rtg ) );
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req.nlh.nlmsg_type = RTM_GETROUTE;
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req.nlh.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
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req.nlh.nlmsg_seq = SEQNUM;
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req.nlh.nlmsg_pid = 0;
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req.rtg.rtgen_family = AF_INET;
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if( 0 > sendto( fd, &req, sizeof( req ), 0,
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(struct sockaddr *) &snl, sizeof( snl ) ) )
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{
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tr_err( "failed to write to routing socket (%s)", strerror( sockerrno ) );
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close( fd );
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return -1;
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}
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return fd;
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}
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static uint8_t *
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getroute( int fd, unsigned int * buflen )
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{
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void * buf;
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unsigned int len;
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ssize_t res;
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struct sockaddr_nl snl;
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socklen_t slen;
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len = 8192;
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buf = calloc( 1, len );
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if( NULL == buf )
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{
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*buflen = 0;
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return NULL;
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}
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for( ;; )
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{
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bzero( &snl, sizeof( snl ) );
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slen = sizeof( snl );
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res = recvfrom( fd, buf, len, 0, (struct sockaddr *) &snl, &slen );
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if( 0 > res )
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{
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if( EAGAIN != sockerrno )
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{
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tr_err( "failed to read from routing socket (%s)",
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strerror( sockerrno ) );
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}
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free( buf );
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*buflen = 0;
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return NULL;
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}
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if( slen < sizeof( snl ) || AF_NETLINK != snl.nl_family )
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{
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tr_err( "bad address" );
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free( buf );
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*buflen = 0;
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return NULL;
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}
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if( 0 == snl.nl_pid )
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{
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break;
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}
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}
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*buflen = res;
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return buf;
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}
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static int
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parseroutes( uint8_t * buf, unsigned int len, struct in_addr * addr )
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{
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struct nlmsghdr * nlm;
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struct nlmsgerr * nle;
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struct rtmsg * rtm;
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struct rtattr * rta;
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int rtalen;
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struct in_addr gw, dst;
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nlm = ( struct nlmsghdr * ) buf;
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while( NLMSG_OK( nlm, len ) )
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{
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gw.s_addr = INADDR_ANY;
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dst.s_addr = INADDR_ANY;
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if( NLMSG_ERROR == nlm->nlmsg_type )
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{
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nle = (struct nlmsgerr *) NLMSG_DATA( nlm );
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if( NLMSG_LENGTH( NLMSG_ALIGN( sizeof( struct nlmsgerr ) ) ) >
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nlm->nlmsg_len )
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{
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tr_err( "truncated netlink error" );
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}
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else
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{
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tr_err( "netlink error (%s)", strerror( nle->error ) );
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}
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return 1;
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}
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else if( RTM_NEWROUTE == nlm->nlmsg_type && SEQNUM == nlm->nlmsg_seq &&
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getpid() == (pid_t) nlm->nlmsg_pid &&
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NLMSG_LENGTH( sizeof( struct rtmsg ) ) <= nlm->nlmsg_len )
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{
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rtm = NLMSG_DATA( nlm );
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rta = RTM_RTA( rtm );
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rtalen = RTM_PAYLOAD( nlm );
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while( RTA_OK( rta, rtalen ) )
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{
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if( sizeof( struct in_addr ) <= RTA_PAYLOAD( rta ) )
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{
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switch( rta->rta_type )
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{
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case RTA_GATEWAY:
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memcpy( &gw, RTA_DATA( rta ), sizeof( gw ) );
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break;
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case RTA_DST:
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memcpy( &dst, RTA_DATA( rta ), sizeof( dst ) );
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break;
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}
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}
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rta = RTA_NEXT( rta, rtalen );
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}
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}
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if( INADDR_NONE != gw.s_addr && INADDR_ANY != gw.s_addr &&
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INADDR_ANY == dst.s_addr )
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{
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*addr = gw;
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return 0;
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}
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nlm = NLMSG_NEXT( nlm, len );
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}
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return 1;
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}
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#else /* not BSD or Linux */
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int
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tr_getDefaultRoute( struct in_addr * addr UNUSED )
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{
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tr_inf( "don't know how to get default route on this platform" );
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return 1;
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}
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#endif
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@ -43,8 +43,7 @@
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#include <sys/types.h>
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#include <dirent.h>
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#include <fcntl.h>
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#include <unistd.h> /* getuid getpid close */
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#include <unistd.h> /* getuid getpid */
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#include "transmission.h"
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#include "list.h"
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@ -625,381 +624,3 @@ tr_getTorrentsDirectory( void )
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init = 1;
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return buf;
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}
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/***
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**** SOCKETS
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***/
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#ifdef BSD
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netinet/in.h> /* struct in_addr */
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#include <sys/sysctl.h>
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#include <net/route.h>
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static uint8_t *
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getroute( int * buflen );
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static int
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parseroutes( uint8_t * buf, int len, struct in_addr * addr );
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int
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tr_getDefaultRoute( struct in_addr * addr )
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{
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uint8_t * buf;
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int len;
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buf = getroute( &len );
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if( NULL == buf )
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{
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tr_err( "failed to get default route (BSD)" );
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return 1;
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}
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len = parseroutes( buf, len, addr );
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free( buf );
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return len;
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}
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#ifndef SA_SIZE
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#define ROUNDUP( a, size ) \
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( ( (a) & ( (size) - 1 ) ) ? ( 1 + ( (a) | ( (size) - 1 ) ) ) : (a) )
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#define SA_SIZE( sap ) \
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( sap->sa_len ? ROUNDUP( (sap)->sa_len, sizeof( u_long ) ) : \
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sizeof( u_long ) )
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#endif /* !SA_SIZE */
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#define NEXT_SA( sap ) \
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(struct sockaddr *) ( (caddr_t) (sap) + ( SA_SIZE( (sap) ) ) )
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static uint8_t *
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getroute( int * buflen )
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{
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int mib[6];
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size_t len;
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uint8_t * buf;
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mib[0] = CTL_NET;
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mib[1] = PF_ROUTE;
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mib[2] = 0;
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mib[3] = AF_INET;
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mib[4] = NET_RT_FLAGS;
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mib[5] = RTF_GATEWAY;
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if( sysctl( mib, 6, NULL, &len, NULL, 0 ) )
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{
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if( ENOENT != errno )
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{
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tr_err( "sysctl net.route.0.inet.flags.gateway failed (%s)",
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strerror( sockerrno ) );
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}
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*buflen = 0;
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return NULL;
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}
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buf = malloc( len );
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if( NULL == buf )
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{
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*buflen = 0;
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return NULL;
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}
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if( sysctl( mib, 6, buf, &len, NULL, 0 ) )
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{
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tr_err( "sysctl net.route.0.inet.flags.gateway failed (%s)",
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strerror( sockerrno ) );
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free( buf );
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*buflen = 0;
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return NULL;
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}
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*buflen = len;
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return buf;
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}
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static int
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parseroutes( uint8_t * buf, int len, struct in_addr * addr )
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{
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uint8_t * end;
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struct rt_msghdr * rtm;
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struct sockaddr * sa;
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struct sockaddr_in * sin;
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int ii;
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struct in_addr dest, gw;
|
||||
|
||||
end = buf + len;
|
||||
while( end > buf + sizeof( *rtm ) )
|
||||
{
|
||||
rtm = (struct rt_msghdr *) buf;
|
||||
buf += rtm->rtm_msglen;
|
||||
if( end >= buf )
|
||||
{
|
||||
dest.s_addr = INADDR_NONE;
|
||||
gw.s_addr = INADDR_NONE;
|
||||
sa = (struct sockaddr *) ( rtm + 1 );
|
||||
|
||||
for( ii = 0; ii < RTAX_MAX && (uint8_t *) sa < buf; ii++ )
|
||||
{
|
||||
if( buf < (uint8_t *) NEXT_SA( sa ) )
|
||||
{
|
||||
break;
|
||||
}
|
||||
|
||||
if( rtm->rtm_addrs & ( 1 << ii ) )
|
||||
{
|
||||
if( AF_INET == sa->sa_family )
|
||||
{
|
||||
sin = (struct sockaddr_in *) sa;
|
||||
switch( ii )
|
||||
{
|
||||
case RTAX_DST:
|
||||
dest = sin->sin_addr;
|
||||
break;
|
||||
case RTAX_GATEWAY:
|
||||
gw = sin->sin_addr;
|
||||
break;
|
||||
}
|
||||
}
|
||||
sa = NEXT_SA( sa );
|
||||
}
|
||||
}
|
||||
|
||||
if( INADDR_ANY == dest.s_addr && INADDR_NONE != gw.s_addr )
|
||||
{
|
||||
*addr = gw;
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
#elif defined( linux ) || defined( __linux ) || defined( __linux__ )
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <linux/netlink.h>
|
||||
#include <linux/rtnetlink.h>
|
||||
|
||||
#define SEQNUM 195909
|
||||
|
||||
static int
|
||||
getsock( void );
|
||||
static uint8_t *
|
||||
getroute( int fd, unsigned int * buflen );
|
||||
static int
|
||||
parseroutes( uint8_t * buf, unsigned int len, struct in_addr * addr );
|
||||
|
||||
int
|
||||
tr_getDefaultRoute( struct in_addr * addr )
|
||||
{
|
||||
int fd, ret;
|
||||
unsigned int len;
|
||||
uint8_t * buf;
|
||||
|
||||
ret = 1;
|
||||
fd = getsock();
|
||||
if( 0 <= fd )
|
||||
{
|
||||
while( ret )
|
||||
{
|
||||
buf = getroute( fd, &len );
|
||||
if( NULL == buf )
|
||||
{
|
||||
break;
|
||||
}
|
||||
ret = parseroutes( buf, len, addr );
|
||||
free( buf );
|
||||
}
|
||||
close( fd );
|
||||
}
|
||||
|
||||
if( ret )
|
||||
{
|
||||
tr_err( "failed to get default route (Linux)" );
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int
|
||||
getsock( void )
|
||||
{
|
||||
int fd, flags;
|
||||
struct
|
||||
{
|
||||
struct nlmsghdr nlh;
|
||||
struct rtgenmsg rtg;
|
||||
} req;
|
||||
struct sockaddr_nl snl;
|
||||
|
||||
fd = socket( PF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE );
|
||||
if( 0 > fd )
|
||||
{
|
||||
tr_err( "failed to create routing socket (%s)", strerror( sockerrno ) );
|
||||
return -1;
|
||||
}
|
||||
|
||||
flags = fcntl( fd, F_GETFL );
|
||||
if( 0 > flags || 0 > fcntl( fd, F_SETFL, O_NONBLOCK | flags ) )
|
||||
{
|
||||
tr_err( "failed to set socket nonblocking (%s)", strerror( sockerrno ) );
|
||||
close( fd );
|
||||
return -1;
|
||||
}
|
||||
|
||||
bzero( &snl, sizeof( snl ) );
|
||||
snl.nl_family = AF_NETLINK;
|
||||
|
||||
bzero( &req, sizeof( req ) );
|
||||
req.nlh.nlmsg_len = NLMSG_LENGTH( sizeof( req.rtg ) );
|
||||
req.nlh.nlmsg_type = RTM_GETROUTE;
|
||||
req.nlh.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
|
||||
req.nlh.nlmsg_seq = SEQNUM;
|
||||
req.nlh.nlmsg_pid = 0;
|
||||
req.rtg.rtgen_family = AF_INET;
|
||||
|
||||
if( 0 > sendto( fd, &req, sizeof( req ), 0,
|
||||
(struct sockaddr *) &snl, sizeof( snl ) ) )
|
||||
{
|
||||
tr_err( "failed to write to routing socket (%s)", strerror( sockerrno ) );
|
||||
close( fd );
|
||||
return -1;
|
||||
}
|
||||
|
||||
return fd;
|
||||
}
|
||||
|
||||
static uint8_t *
|
||||
getroute( int fd, unsigned int * buflen )
|
||||
{
|
||||
void * buf;
|
||||
unsigned int len;
|
||||
ssize_t res;
|
||||
struct sockaddr_nl snl;
|
||||
socklen_t slen;
|
||||
|
||||
len = 8192;
|
||||
buf = calloc( 1, len );
|
||||
if( NULL == buf )
|
||||
{
|
||||
*buflen = 0;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
for( ;; )
|
||||
{
|
||||
bzero( &snl, sizeof( snl ) );
|
||||
slen = sizeof( snl );
|
||||
res = recvfrom( fd, buf, len, 0, (struct sockaddr *) &snl, &slen );
|
||||
if( 0 > res )
|
||||
{
|
||||
if( EAGAIN != sockerrno )
|
||||
{
|
||||
tr_err( "failed to read from routing socket (%s)",
|
||||
strerror( sockerrno ) );
|
||||
}
|
||||
free( buf );
|
||||
*buflen = 0;
|
||||
return NULL;
|
||||
}
|
||||
if( slen < sizeof( snl ) || AF_NETLINK != snl.nl_family )
|
||||
{
|
||||
tr_err( "bad address" );
|
||||
free( buf );
|
||||
*buflen = 0;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if( 0 == snl.nl_pid )
|
||||
{
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
*buflen = res;
|
||||
|
||||
return buf;
|
||||
}
|
||||
|
||||
static int
|
||||
parseroutes( uint8_t * buf, unsigned int len, struct in_addr * addr )
|
||||
{
|
||||
struct nlmsghdr * nlm;
|
||||
struct nlmsgerr * nle;
|
||||
struct rtmsg * rtm;
|
||||
struct rtattr * rta;
|
||||
int rtalen;
|
||||
struct in_addr gw, dst;
|
||||
|
||||
nlm = ( struct nlmsghdr * ) buf;
|
||||
while( NLMSG_OK( nlm, len ) )
|
||||
{
|
||||
gw.s_addr = INADDR_ANY;
|
||||
dst.s_addr = INADDR_ANY;
|
||||
if( NLMSG_ERROR == nlm->nlmsg_type )
|
||||
{
|
||||
nle = (struct nlmsgerr *) NLMSG_DATA( nlm );
|
||||
if( NLMSG_LENGTH( NLMSG_ALIGN( sizeof( struct nlmsgerr ) ) ) >
|
||||
nlm->nlmsg_len )
|
||||
{
|
||||
tr_err( "truncated netlink error" );
|
||||
}
|
||||
else
|
||||
{
|
||||
tr_err( "netlink error (%s)", strerror( nle->error ) );
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
else if( RTM_NEWROUTE == nlm->nlmsg_type && SEQNUM == nlm->nlmsg_seq &&
|
||||
getpid() == (pid_t) nlm->nlmsg_pid &&
|
||||
NLMSG_LENGTH( sizeof( struct rtmsg ) ) <= nlm->nlmsg_len )
|
||||
{
|
||||
rtm = NLMSG_DATA( nlm );
|
||||
rta = RTM_RTA( rtm );
|
||||
rtalen = RTM_PAYLOAD( nlm );
|
||||
|
||||
while( RTA_OK( rta, rtalen ) )
|
||||
{
|
||||
if( sizeof( struct in_addr ) <= RTA_PAYLOAD( rta ) )
|
||||
{
|
||||
switch( rta->rta_type )
|
||||
{
|
||||
case RTA_GATEWAY:
|
||||
memcpy( &gw, RTA_DATA( rta ), sizeof( gw ) );
|
||||
break;
|
||||
case RTA_DST:
|
||||
memcpy( &dst, RTA_DATA( rta ), sizeof( dst ) );
|
||||
break;
|
||||
}
|
||||
}
|
||||
rta = RTA_NEXT( rta, rtalen );
|
||||
}
|
||||
}
|
||||
|
||||
if( INADDR_NONE != gw.s_addr && INADDR_ANY != gw.s_addr &&
|
||||
INADDR_ANY == dst.s_addr )
|
||||
{
|
||||
*addr = gw;
|
||||
return 0;
|
||||
}
|
||||
|
||||
nlm = NLMSG_NEXT( nlm, len );
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
#else /* not BSD or Linux */
|
||||
|
||||
int
|
||||
tr_getDefaultRoute( struct in_addr * addr UNUSED )
|
||||
{
|
||||
tr_inf( "don't know how to get default route on this platform" );
|
||||
return 1;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -21,6 +21,7 @@
|
|||
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
||||
* DEALINGS IN THE SOFTWARE.
|
||||
*****************************************************************************/
|
||||
|
||||
#ifndef TR_PLATFORM_H
|
||||
#define TR_PLATFORM_H
|
||||
|
||||
|
|
@ -48,8 +49,4 @@ void tr_condSignal ( tr_cond * );
|
|||
void tr_condBroadcast ( tr_cond * );
|
||||
void tr_condWait ( tr_cond *, tr_lock * );
|
||||
|
||||
struct in_addr; /* forward declaration to calm gcc down */
|
||||
int
|
||||
tr_getDefaultRoute( struct in_addr * addr );
|
||||
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in New Issue