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net: Add util to check if IPv4 address is part of a subnet

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Change-Id: I6005861a4c4085b6c17ded03fda38a567a4e504a
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
This commit is contained in:
Jukka Rissanen 2016-05-23 17:21:09 +03:00
commit 702ea43621
3 changed files with 47 additions and 0 deletions
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23
net/yaip/net_if.c
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@ -227,6 +227,29 @@ const struct in_addr *net_if_ipv4_broadcast_addr(void)
#endif
}
bool net_if_ipv4_addr_mask_cmp(struct net_if *iface,
struct in_addr *addr)
{
#if defined(CONFIG_NET_IPV4)
uint32_t subnet = ntohl(addr->s_addr[0]) &
ntohl(iface->ipv4.netmask.s_addr[0]);
int i;
for (i = 0; i < NET_IF_MAX_IPV4_ADDR; i++) {
if (!iface->ipv4.unicast[i].is_used ||
iface->ipv4.unicast[i].address.family != AF_INET) {
continue;
}
if ((ntohl(iface->ipv4.unicast[i].address.in_addr.s_addr[0]) &
ntohl(iface->ipv4.netmask.s_addr[0])) == subnet) {
return true;
}
}
#endif
return false;
}
struct in6_addr *net_if_ipv6_get_ll(struct net_if *iface,
enum net_addr_state addr_state)
{