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net: if: Skip DAD when adding loopback IPv6 address

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There's no point in perfoming DAD procedure for loopback address,
hence skip it.

Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
This commit is contained in:
Robert Lubos 2021-10-07 11:32:00 +02:00 • committed by Carles Cufí
commit 6f46124d6e
1 changed files with 5 additions and 2 deletions
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7
subsys/net/ip/net_if.c
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@ -1248,7 +1248,9 @@ void net_if_start_dad(struct net_if *iface)
for (i = 0; i < NET_IF_MAX_IPV6_ADDR; i++) { for (i = 0; i < NET_IF_MAX_IPV6_ADDR; i++) {
if (!ipv6->unicast[i].is_used || if (!ipv6->unicast[i].is_used ||
ipv6->unicast[i].address.family != AF_INET6 || ipv6->unicast[i].address.family != AF_INET6 ||
&ipv6->unicast[i] == ifaddr) { &ipv6->unicast[i] == ifaddr ||
net_ipv6_is_addr_loopback(
&ipv6->unicast[i].address.in6_addr)) {
continue; continue;
} }
@ -1683,7 +1685,8 @@ struct net_if_addr *net_if_ipv6_addr_add(struct net_if *iface,
iface, log_strdup(net_sprint_ipv6_addr(addr)), iface, log_strdup(net_sprint_ipv6_addr(addr)),
net_addr_type2str(addr_type)); net_addr_type2str(addr_type));
if (!(l2_flags_get(iface) & NET_L2_POINT_TO_POINT)) { if (!(l2_flags_get(iface) & NET_L2_POINT_TO_POINT) &&
!net_ipv6_is_addr_loopback(addr)) {
/* RFC 4862 5.4.2 /* RFC 4862 5.4.2
* Before sending a Neighbor Solicitation, an interface * Before sending a Neighbor Solicitation, an interface
* MUST join the all-nodes multicast address and the * MUST join the all-nodes multicast address and the