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| author | Willem de Bruijn <willemb@google.com> | 2020-07-24 09:03:10 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-07-24 17:12:41 -0700 |
| commit | 01370434df85eb76ecb1527a4466013c4aca2436 (patch) | |
| tree | cff5b3519cd10e640cd125b27291e2a8f703eaf4 /net/ipv6/datagram.c | |
| parent | 178c49d9f9a4b5ade00c93480d714708fe971e24 (diff) | |
| download | lwn-01370434df85eb76ecb1527a4466013c4aca2436.tar.gz lwn-01370434df85eb76ecb1527a4466013c4aca2436.zip | |
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/datagram.c')
| -rw-r--r-- | net/ipv6/datagram.c | 16 |
1 files changed, 16 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)) |