MT#55283 add function to enable PKTINFO delivery

Change-Id: I9aaedb54d19aa4fc2cf4996b630272dc44e26b55

lib/socket.c

@@ -27,6 +27,8 @@ static int __ip_connect(socket_t *s, const endpoint_t *);
 static int __ip_listen(socket_t *s, int backlog);
 static int __ip_accept(socket_t *s, socket_t *new_sock);
 static int __ip_timestamping(socket_t *s);
+static int __ip4_pktinfo(socket_t *s);
+static int __ip6_pktinfo(socket_t *s);
 static int __ip4_sockaddr2endpoint(endpoint_t *, const void *);
 static int __ip6_sockaddr2endpoint(endpoint_t *, const void *);
 static int __ip4_endpoint2sockaddr(void *, const endpoint_t *);
@@ -81,6 +83,7 @@ static struct socket_family __socket_families[__SF_LAST] = {
 		.listen			= __ip_listen,
 		.accept			= __ip_accept,
 		.timestamping		= __ip_timestamping,
+		.pktinfo		= __ip4_pktinfo,
 		.recvfrom		= __ip_recvfrom,
 		.recvfrom_ts		= __ip_recvfrom_ts,
 		.sendmsg		= __ip_sendmsg,
@@ -113,6 +116,7 @@ static struct socket_family __socket_families[__SF_LAST] = {
 		.listen			= __ip_listen,
 		.accept			= __ip_accept,
 		.timestamping		= __ip_timestamping,
+		.pktinfo		= __ip6_pktinfo,
 		.recvfrom		= __ip_recvfrom,
 		.recvfrom_ts		= __ip_recvfrom_ts,
 		.sendmsg		= __ip_sendmsg,
@@ -396,6 +400,18 @@ static int __ip_timestamping(socket_t *s) {
 		return -1;
 	return 0;
 }
+static int __ip4_pktinfo(socket_t *s) {
+	int one = 1;
+	if (setsockopt(s->fd, IPPROTO_IP, IP_PKTINFO, &one, sizeof(one)))
+		return -1;
+	return 0;
+}
+static int __ip6_pktinfo(socket_t *s) {
+	int one = 1;
+	if (setsockopt(s->fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one)))
+		return -1;
+	return 0;
+}
 static void __ip4_endpoint2kernel(struct re_address *ra, const endpoint_t *ep) {
 	ZERO(*ra);
 	ra->family = AF_INET;

lib/socket.h

@@ -72,6 +72,7 @@ struct socket_family {
 	int				(*listen)(socket_t *, int);
 	int				(*accept)(socket_t *, socket_t *);
 	int				(*timestamping)(socket_t *);
+	int				(*pktinfo)(socket_t *);
 	ssize_t				(*recvfrom)(socket_t *, void *, size_t, endpoint_t *);
 	ssize_t				(*recvfrom_ts)(socket_t *, void *, size_t, endpoint_t *, struct timeval *);
 	ssize_t				(*sendmsg)(socket_t *, struct msghdr *, const endpoint_t *);
@@ -172,6 +173,7 @@ INLINE int is_addr_unspecified(const sockaddr_t *a) {
 #define socket_sendto(s,a...) (s)->family->sendto((s), a)
 #define socket_error(s) (s)->family->error((s))
 #define socket_timestamping(s) (s)->family->timestamping((s))
+#define socket_pktinfo(s) (s)->family->pktinfo((s))
 INLINE ssize_t socket_sendiov(socket_t *s, const struct iovec *v, unsigned int len, const endpoint_t *dst) {
 	struct msghdr mh;
 	ZERO(mh);