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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: f2aeed3a59 ("rxrpc: Fix error reception on AF_INET6 sockets")
Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells 2018-09-27 15:13:09 +01:00
parent 0099dc589b
commit 37a675e768
1 changed files with 23 additions and 20 deletions
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43
net/rxrpc/local_object.c
View File

@ -135,6 +135,29 @@ static int rxrpc_open_socket(struct rxrpc_local *local, struct net *net)
} }
switch (local->srx.transport.family) { switch (local->srx.transport.family) {
case AF_INET6:
/* we want to receive ICMPv6 errors */
opt = 1;
ret = kernel_setsockopt(local->socket, SOL_IPV6, IPV6_RECVERR,
(char *) &opt, sizeof(opt));
if (ret < 0) {
_debug("setsockopt failed");
goto error;
}
/* we want to set the don't fragment bit */
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;
}
/* Fall through and set IPv4 options too otherwise we don't get
* errors from IPv4 packets sent through the IPv6 socket.
*/
case AF_INET: case AF_INET:
/* we want to receive ICMP errors */ /* we want to receive ICMP errors */
opt = 1; opt = 1;
@ -153,26 +176,6 @@ static int rxrpc_open_socket(struct rxrpc_local *local, struct net *net)
_debug("setsockopt failed"); _debug("setsockopt failed");
goto error; goto error;
} }
break;
case AF_INET6:
/* we want to receive ICMP errors */
opt = 1;
ret = kernel_setsockopt(local->socket, SOL_IPV6, IPV6_RECVERR,
(char *) &opt, sizeof(opt));
if (ret < 0) {
_debug("setsockopt failed");
goto error;
}
/* we want to set the don't fragment bit */
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;
}
/* We want receive timestamps. */ /* We want receive timestamps. */
opt = 1; opt = 1;