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Commit 37a675e7 authored by David Howells's avatar David Howells
Browse files

rxrpc: Fix transport sockopts to get IPv4 errors on an IPv6 socket 



It seems that enabling IPV6_RECVERR on an IPv6 socket doesn't also turn on
IP_RECVERR, so neither local errors nor ICMP-transported remote errors from
IPv4 peer addresses are returned to the AF_RXRPC protocol.

Make the sockopt setting code in rxrpc_open_socket() fall through from the
AF_INET6 case to the AF_INET case to turn on all the AF_INET options too in
the AF_INET6 case.

Fixes: f2aeed3a ("rxrpc: Fix error reception on AF_INET6 sockets")
Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
parent 0099dc58

net/rxrpc/local_object.c

+13 −10
Original line number Diff line number Diff line
@@ -135,10 +135,10 @@ static int rxrpc_open_socket(struct rxrpc_local *local, struct net *net) 
	}



	switch (local->srx.transport.family) {

	case AF_INET:

		/* we want to receive ICMP errors */

	case AF_INET6:

		/* we want to receive ICMPv6 errors */

		opt = 1;

		ret = kernel_setsockopt(local->socket, SOL_IP, IP_RECVERR,

		ret = kernel_setsockopt(local->socket, SOL_IPV6, IPV6_RECVERR,

					(char *) &opt, sizeof(opt));

		if (ret < 0) {

			_debug("setsockopt failed");
@@ -146,19 +146,22 @@ static int rxrpc_open_socket(struct rxrpc_local *local, struct net *net) 
		}



		/* we want to set the don't fragment bit */

		opt = IP_PMTUDISC_DO;

		ret = kernel_setsockopt(local->socket, SOL_IP, IP_MTU_DISCOVER,

		opt = IPV6_PMTUDISC_DO;

		ret = kernel_setsockopt(local->socket, SOL_IPV6, IPV6_MTU_DISCOVER,

					(char *) &opt, sizeof(opt));

		if (ret < 0) {

			_debug("setsockopt failed");

			goto error;

		}

		break;



	case AF_INET6:

		/* Fall through and set IPv4 options too otherwise we don't get

		 * errors from IPv4 packets sent through the IPv6 socket.

		 */



	case AF_INET:

		/* we want to receive ICMP errors */

		opt = 1;

		ret = kernel_setsockopt(local->socket, SOL_IPV6, IPV6_RECVERR,

		ret = kernel_setsockopt(local->socket, SOL_IP, IP_RECVERR,

					(char *) &opt, sizeof(opt));

		if (ret < 0) {

			_debug("setsockopt failed");
@@ -166,8 +169,8 @@ static int rxrpc_open_socket(struct rxrpc_local *local, struct net *net) 
		}



		/* we want to set the don't fragment bit */

		opt = IPV6_PMTUDISC_DO;

		ret = kernel_setsockopt(local->socket, SOL_IPV6, IPV6_MTU_DISCOVER,

		opt = IP_PMTUDISC_DO;

		ret = kernel_setsockopt(local->socket, SOL_IP, IP_MTU_DISCOVER,

					(char *) &opt, sizeof(opt));

		if (ret < 0) {

			_debug("setsockopt failed");