Commit f4c4d120 authored by Jukka Rissanen's avatar Jukka Rissanen Committed by Ioannis Glaropoulos
Browse files

net: mdns: Use 5353 source port when sending the query 



The source UDP port in all Multicast DNS responses MUST be 5353
as described in RFC 6762 chapter 6.

Fixes #18732

Signed-off-by: default avatarJukka Rissanen <jukka.rissanen@linux.intel.com>
parent 39bb8d52

subsys/net/lib/dns/resolve.c

+18 −0
Original line number Diff line number Diff line
@@ -246,6 +246,11 @@ int dns_resolve_init(struct dns_resolve_context *ctx, const char *servers[], 
#if defined(CONFIG_NET_IPV6)

			local_addr = (struct sockaddr *)&local_addr6;

			addr_len = sizeof(struct sockaddr_in6);



			if (IS_ENABLED(CONFIG_MDNS_RESOLVER) &&

			    ctx->servers[i].is_mdns) {

				local_addr6.sin6_port = htons(5353);

			}

#else

			continue;

#endif
@@ -255,6 +260,11 @@ int dns_resolve_init(struct dns_resolve_context *ctx, const char *servers[], 
#if defined(CONFIG_NET_IPV4)

			local_addr = (struct sockaddr *)&local_addr4;

			addr_len = sizeof(struct sockaddr_in);



			if (IS_ENABLED(CONFIG_MDNS_RESOLVER) &&

			    ctx->servers[i].is_mdns) {

				local_addr4.sin_port = htons(5353);

			}

#else

			continue;

#endif
@@ -291,6 +301,14 @@ int dns_resolve_init(struct dns_resolve_context *ctx, const char *servers[], 
			net_mgmt_event_notify(NET_EVENT_DNS_SERVER_ADD, iface);

		}



#if defined(CONFIG_NET_IPV6)

		local_addr6.sin6_port = 0;

#endif



#if defined(CONFIG_NET_IPV4)

		local_addr4.sin_port = 0;

#endif



		count++;

	}

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