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do not send multicast message using thread-only source addresses #772

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merged 3 commits into from
Feb 26, 2024
Merged

do not send multicast message using thread-only source addresses #772

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7dd1367
do not send multicast message using thread-only source addresses
tiniuclx Feb 26, 2024
a5a2b97
write address check in platform independent way
tiniuclx Feb 26, 2024
6273d43
Automatic format commit
CascodaBot Feb 26, 2024
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7 changes: 7 additions & 0 deletions port/linux/ipadapter.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1116,7 +1116,14 @@ oc_send_discovery_request(oc_message_t *message)
if ((message->endpoint.flags & IPV6) && iface->ifa_addr &&
iface->ifa_addr->sa_family == AF_INET6) {
struct sockaddr_in6 *addr = (struct sockaddr_in6 *)iface->ifa_addr;
// check for Thread mesh local prefix
memcpy(&message->endpoint.addr_local.ipv6.address, &addr->sin6_addr, 16);
uint8_t *epaddr = message->endpoint.addr_local.ipv6.address;
uint8_t thread_prefix[8] = { 0xfd, 0xde, 0xad, 0x00,
0xbe, 0xef, 0x00, 0x00 };
bool is_thread_mesh = memcmp(epaddr, thread_prefix, 8) == 0;
if (is_thread_mesh)
continue;
unsigned int mif = if_nametoindex(iface->ifa_name);
if (setsockopt(dev->server_sock, IPPROTO_IPV6, IPV6_MULTICAST_IF, &mif,
sizeof(mif)) == -1) {
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