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housekeeping. revert r3984 at tiennou's request

This commit is contained in:
Charles Kerr 2007-11-27 15:39:59 +00:00
parent 24c2d30a7c
commit 398bc04bcf
3 changed files with 385 additions and 385 deletions
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384
libtransmission/natpmp.c
View File

@ -28,9 +28,6 @@
#include <string.h>
#include <time.h>
#include <unistd.h> /* close */
#include <fcntl.h> /* fcntl */
#ifdef __BEOS__
#include <netdb.h>
#endif
@ -40,6 +37,7 @@
#include "transmission.h"
#include "natpmp.h"
#include "net.h"
#include "platform.h" /* tr_getDefaultRoute() */
#include "utils.h"
#define PMP_PORT 5351
@ -66,8 +64,6 @@
#define PMP_FROMBUF16( buf ) ( htons( *( (uint16_t *) (buf) ) ) )
#define PMP_FROMBUF32( buf ) ( htonl( *( (uint32_t *) (buf) ) ) )
static int tr_getDefaultRoute( struct in_addr * addr );
typedef struct tr_natpmp_uptime_s
{
time_t when;
@ -825,381 +821,3 @@ parseresponse( uint8_t * buf, int len, int port, tr_natpmp_parse_t * parse )
return TR_NET_OK;
}
/***
**** tr_getDefaultRoute()
***/
#ifdef BSD
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netinet/in.h> /* struct in_addr */
#include <sys/sysctl.h>
#include <net/route.h>
static uint8_t *
getroute( int * buflen );
static int
parseroutes( uint8_t * buf, int len, struct in_addr * addr );
static int
tr_getDefaultRoute( struct in_addr * addr )
{
uint8_t * buf;
int len;
buf = getroute( &len );
if( NULL == buf )
{
tr_err( "failed to get default route (BSD)" );
return 1;
}
len = parseroutes( buf, len, addr );
free( buf );
return len;
}
#ifndef SA_SIZE
#define ROUNDUP( a, size ) \
( ( (a) & ( (size) - 1 ) ) ? ( 1 + ( (a) | ( (size) - 1 ) ) ) : (a) )
#define SA_SIZE( sap ) \
( sap->sa_len ? ROUNDUP( (sap)->sa_len, sizeof( u_long ) ) : \
sizeof( u_long ) )
#endif /* !SA_SIZE */
#define NEXT_SA( sap ) \
(struct sockaddr *) ( (caddr_t) (sap) + ( SA_SIZE( (sap) ) ) )
static uint8_t *
getroute( int * buflen )
{
int mib[6];
size_t len;
uint8_t * buf;
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0;
mib[3] = AF_INET;
mib[4] = NET_RT_FLAGS;
mib[5] = RTF_GATEWAY;
if( sysctl( mib, 6, NULL, &len, NULL, 0 ) )
{
if( ENOENT != errno )
{
tr_err( "sysctl net.route.0.inet.flags.gateway failed (%s)",
strerror( sockerrno ) );
}
*buflen = 0;
return NULL;
}
buf = malloc( len );
if( NULL == buf )
{
*buflen = 0;
return NULL;
}
if( sysctl( mib, 6, buf, &len, NULL, 0 ) )
{
tr_err( "sysctl net.route.0.inet.flags.gateway failed (%s)",
strerror( sockerrno ) );
free( buf );
*buflen = 0;
return NULL;
}
*buflen = len;
return buf;
}
static int
parseroutes( uint8_t * buf, int len, struct in_addr * addr )
{
uint8_t * end;
struct rt_msghdr * rtm;
struct sockaddr * sa;
struct sockaddr_in * sin;
int ii;
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

381
libtransmission/platform.c
View File

@ -43,7 +43,8 @@
#include <sys/types.h>
#include <dirent.h>
#include <unistd.h> /* getuid getpid */
#include <fcntl.h>
#include <unistd.h> /* getuid getpid close */
#include "transmission.h"
#include "list.h"
@ -624,3 +625,381 @@ tr_getTorrentsDirectory( void )
init = 1;
return buf;
}
/***
**** SOCKETS
***/
#ifdef BSD
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netinet/in.h> /* struct in_addr */
#include <sys/sysctl.h>
#include <net/route.h>
static uint8_t *
getroute( int * buflen );
static int
parseroutes( uint8_t * buf, int len, struct in_addr * addr );
int
tr_getDefaultRoute( struct in_addr * addr )
{
uint8_t * buf;
int len;
buf = getroute( &len );
if( NULL == buf )
{
tr_err( "failed to get default route (BSD)" );
return 1;
}
len = parseroutes( buf, len, addr );
free( buf );
return len;
}
#ifndef SA_SIZE
#define ROUNDUP( a, size ) \
( ( (a) & ( (size) - 1 ) ) ? ( 1 + ( (a) | ( (size) - 1 ) ) ) : (a) )
#define SA_SIZE( sap ) \
( sap->sa_len ? ROUNDUP( (sap)->sa_len, sizeof( u_long ) ) : \
sizeof( u_long ) )
#endif /* !SA_SIZE */
#define NEXT_SA( sap ) \
(struct sockaddr *) ( (caddr_t) (sap) + ( SA_SIZE( (sap) ) ) )
static uint8_t *
getroute( int * buflen )
{
int mib[6];
size_t len;
uint8_t * buf;
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0;
mib[3] = AF_INET;
mib[4] = NET_RT_FLAGS;
mib[5] = RTF_GATEWAY;
if( sysctl( mib, 6, NULL, &len, NULL, 0 ) )
{
if( ENOENT != errno )
{
tr_err( "sysctl net.route.0.inet.flags.gateway failed (%s)",
strerror( sockerrno ) );
}
*buflen = 0;
return NULL;
}
buf = malloc( len );
if( NULL == buf )
{
*buflen = 0;
return NULL;
}
if( sysctl( mib, 6, buf, &len, NULL, 0 ) )
{
tr_err( "sysctl net.route.0.inet.flags.gateway failed (%s)",
strerror( sockerrno ) );
free( buf );
*buflen = 0;
return NULL;
}
*buflen = len;
return buf;
}
static int
parseroutes( uint8_t * buf, int len, struct in_addr * addr )
{
uint8_t * end;
struct rt_msghdr * rtm;
struct sockaddr * sa;
struct sockaddr_in * sin;
int ii;
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

5
libtransmission/platform.h
View File

@ -21,7 +21,6 @@
* 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
@ -49,4 +48,8 @@ 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