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core: add function nm_utils_ip6_address_clear_host_address()

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Signed-off-by: Thomas Haller <thaller@redhat.com>
This commit is contained in:
Thomas Haller
2014-02-13 18:12:41 +01:00
parent ebbd6575ff
commit e8775dd9fc
4 changed files with 120 additions and 25 deletions
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44
src/NetworkManagerUtils.c
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@@ -75,6 +75,50 @@ nm_ethernet_address_is_valid (const struct ether_addr *test_addr)
}
/* nm_utils_ip4_address_clear_host_address:
* @addr: source ip6 address
* @plen: prefix length of network
*
* returns: the input address, with the host address set to 0.
*/
in_addr_t
nm_utils_ip4_address_clear_host_address (in_addr_t addr, guint8 plen)
{
return addr & nm_utils_ip4_prefix_to_netmask (plen);
}
/* nm_utils_ip6_address_clear_host_address:
* @dst: destination output buffer, will contain the network part of the @src address
* @src: source ip6 address
* @plen: prefix length of network
*
* Note: this function is self assignment save, to update @src inplace, set both
* @dst and @src to the same destination.
*/
void
nm_utils_ip6_address_clear_host_address (struct in6_addr *dst, const struct in6_addr *src, guint8 plen)
{
g_return_if_fail (plen <= 128);
g_return_if_fail (src);
g_return_if_fail (dst);
if (plen < 128) {
guint nbytes = plen / 8;
guint nbits = plen % 8;
if (nbytes && dst != src)
memcpy (dst, src, nbytes);
if (nbits) {
dst->s6_addr[nbytes] = (src->s6_addr[nbytes] & (0xFF << (8 - nbits)));
nbytes++;
}
if (nbytes <= 15)
memset (&dst->s6_addr[nbytes], 0, 16 - nbytes);
} else if (src != dst)
*dst = *src;
}
int
nm_spawn_process (const char *args)
{