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(trunk libT) make IPv6's two IPv4-compatible address formats invalid peer addresses 

IPv4 peers should only be seen from an IPv4-connected tracker.
This commit is contained in:
Erick Turnquist 2009-03-27 01:31:17 +00:00
parent dd7eb76718
commit 2f8d56e77f
3 changed files with 17 additions and 20 deletions
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27
libtransmission/net.c
View File

@ -170,18 +170,6 @@ tr_pton( const char * src, tr_address * dst )
return dst;
}
void
tr_normalizeV4Mapped( tr_address * const addr )
{
assert( tr_isAddress( addr ) );
if( addr->type == TR_AF_INET6 && IN6_IS_ADDR_V4MAPPED( &addr->addr.addr6 ) )
{
addr->type = TR_AF_INET;
memcpy( &addr->addr.addr4.s_addr, addr->addr.addr6.s6_addr + 12, 4 );
}
}
/*
* Compare two tr_address structures.
* Returns:
@ -428,6 +416,18 @@ isMulticastAddress( const tr_address * addr )
return FALSE;
}
static TR_INLINE tr_bool
isIPv4MappedOrCompatAddress( const tr_address * addr )
{
if( addr->type == TR_AF_INET6 )
{
if( IN6_IS_ADDR_V4MAPPED( &addr->addr.addr6 ) ||
IN6_IS_ADDR_V4COMPAT( &addr->addr.addr6 ) )
return TRUE;
}
return FALSE;
}
static TR_INLINE tr_bool
isIPv6LinkLocalAddress( const tr_address * addr )
{
@ -440,7 +440,8 @@ isIPv6LinkLocalAddress( const tr_address * addr )
tr_bool
tr_isValidPeerAddress( const tr_address * addr, tr_port port )
{
if( isMulticastAddress( addr ) || isIPv6LinkLocalAddress( addr ) )
if( isMulticastAddress( addr ) || isIPv6LinkLocalAddress( addr ) ||
isIPv4MappedOrCompatAddress( addr ) )
return FALSE;
if( port == 0 )

1
libtransmission/net.h
View File

@ -86,7 +86,6 @@ tr_address *tr_pton( const char * src,
tr_address * dst );
int tr_compareAddresses( const tr_address * a,
const tr_address * b);
void tr_normalizeV4Mapped( tr_address * const addr );
tr_bool tr_isValidPeerAddress( const tr_address * addr, tr_port port );

5
libtransmission/peer-mgr.c
View File

@ -1830,11 +1830,8 @@ tr_peerMgrPeerStats( const tr_torrent * tor,
const tr_peer * peer = peers[i];
const struct peer_atom * atom = getExistingAtom( t, &peer->addr );
tr_peer_stat * stat = ret + i;
tr_address norm_addr;
norm_addr = peer->addr;
tr_normalizeV4Mapped( &norm_addr );
tr_ntop( &norm_addr, stat->addr, sizeof( stat->addr ) );
tr_ntop( &peer->addr, stat->addr, sizeof( stat->addr ) );
tr_strlcpy( stat->client, ( peer->client ? peer->client : "" ),
sizeof( stat->client ) );
stat->port = ntohs( peer->port );