summaryrefslogtreecommitdiff
path: root/net/ipv6
diff options
context:
space:
mode:
authorWillem de Bruijn <willemb@google.com>2020-07-24 09:03:10 -0400
committerDavid S. Miller <davem@davemloft.net>2020-07-24 17:12:41 -0700
commit01370434df85eb76ecb1527a4466013c4aca2436 (patch)
treecff5b3519cd10e640cd125b27291e2a8f703eaf4 /net/ipv6
parent178c49d9f9a4b5ade00c93480d714708fe971e24 (diff)
icmp6: support rfc 4884
Extend the rfc 4884 read interface introduced for ipv4 in commit eba75c587e81 ("icmp: support rfc 4884") to ipv6. Add socket option SOL_IPV6/IPV6_RECVERR_RFC4884. Changes v1->v2: - make ipv6_icmp_error_rfc4884 static (file scope) Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/datagram.c16
-rw-r--r--net/ipv6/ipv6_sockglue.c12
2 files changed, 28 insertions, 0 deletions
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index 390bedde21a5..cc8ad7ddecda 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -19,6 +19,7 @@
#include <linux/route.h>
#include <linux/slab.h>
#include <linux/export.h>
+#include <linux/icmp.h>
#include <net/ipv6.h>
#include <net/ndisc.h>
@@ -284,6 +285,17 @@ int ip6_datagram_connect_v6_only(struct sock *sk, struct sockaddr *uaddr,
}
EXPORT_SYMBOL_GPL(ip6_datagram_connect_v6_only);
+static void ipv6_icmp_error_rfc4884(const struct sk_buff *skb,
+ struct sock_ee_data_rfc4884 *out)
+{
+ switch (icmp6_hdr(skb)->icmp6_type) {
+ case ICMPV6_TIME_EXCEED:
+ case ICMPV6_DEST_UNREACH:
+ ip_icmp_error_rfc4884(skb, out, sizeof(struct icmp6hdr),
+ icmp6_hdr(skb)->icmp6_datagram_len * 8);
+ }
+}
+
void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
__be16 port, u32 info, u8 *payload)
{
@@ -313,6 +325,10 @@ void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
serr->port = port;
__skb_pull(skb, payload - skb->data);
+
+ if (inet6_sk(sk)->recverr_rfc4884)
+ ipv6_icmp_error_rfc4884(skb, &serr->ee.ee_rfc4884);
+
skb_reset_transport_header(skb);
if (sock_queue_err_skb(sk, skb))
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index d2282f5c9760..20c740976334 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -965,6 +965,14 @@ done:
np->rxopt.bits.recvfragsize = valbool;
retv = 0;
break;
+ case IPV6_RECVERR_RFC4884:
+ if (optlen < sizeof(int))
+ goto e_inval;
+ if (val < 0 || val > 1)
+ goto e_inval;
+ np->recverr_rfc4884 = valbool;
+ retv = 0;
+ break;
}
release_sock(sk);
@@ -1439,6 +1447,10 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
val = np->rtalert_isolate;
break;
+ case IPV6_RECVERR_RFC4884:
+ val = np->recverr_rfc4884;
+ break;
+
default:
return -ENOPROTOOPT;
}