brcm_nl: probe for existing wds interface at boot

src/utils/brcm_nl.c

@@ -70,6 +70,7 @@ static int func(struct nl_msg *msg, void *arg)
 	struct nlmsghdr *nlh = nlmsg_hdr(msg);
 
 	switch (nlh->nlmsg_type) {
+	case RTM_GETLINK:
 	case RTM_NEWLINK:
 	case RTM_DELLINK:
 		{
@@ -93,6 +94,10 @@ static int func(struct nl_msg *msg, void *arg)
 			if (!strstr(ifname, "wds"))
 				break;
 
+			if (if_isbridge_interface(ifname)) {
+				printf("Interface %s is already a part of a bridge\n", ifname);
+				break;
+			}
 
 			printf("Adding interface %s to bridge %s!\n", ifname, bridge);
 
@@ -132,6 +137,7 @@ int brcm_nl_loop(void *arg)
 
 	nl_connect(sk, NETLINK_ROUTE);
 	nl_socket_add_memberships(sk, RTNLGRP_LINK, 0);
+	nl_rtgen_request(sk, RTM_GETLINK, AF_UNSPEC, NLM_F_DUMP);
 
 	for (;;)
 		nl_recvmsgs_default(sk);