torproject/tor
1
0
Fork 0
mirror of https://gitlab.torproject.org/tpo/core/tor.git synced 2024-12-06 19:41:15 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

Multicast addresses, if any were configured, would not be good if addrs

Browse Source
This commit is contained in:
Nick Mathewson
2011-12-07 16:03:32 -05:00
parent aa529f6c32
commit 5d44a6b334
1 changed files with 21 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/common/address.c
+21 -1
View File
@@ -1203,6 +1203,24 @@ get_interface_addresses_raw(int severity)
return NULL;
#endif
}
/** Return true iff <b>a</b> is a multicast address. */
static int
tor_addr_is_multicast(const tor_addr_t *a)
{
sa_family_t family = tor_addr_family(a);
if (family == AF_INET) {
uint32_t ipv4h = tor_addr_to_ipv4h(a);
if ((ipv4h >> 24) == 0xe0)
return 1; /* Multicast */
} else if (family == AF_INET6) {
const uint8_t *a32 = tor_addr_to_in6_addr8(a);
if (a32[0] == 0xff)
return 1;
}
return 0;
}
/** Set *<b>addr</b> to the IP address (if any) of whatever interface
* connects to the Internet. This address should only be used in checking
* whether our address has changed. Return 0 on success, -1 on failure.
@@ -1223,8 +1241,10 @@ get_interface_address6(int severity, sa_family_t family, tor_addr_t *addr)
SMARTLIST_FOREACH_BEGIN(addrs, tor_addr_t *, a) {
if (family != AF_UNSPEC && family != tor_addr_family(a))
continue;
if (tor_addr_is_loopback(a))
if (tor_addr_is_loopback(a) ||
tor_addr_is_multicast(a))
continue;
tor_addr_copy(addr, a);
rv = 0;