diff options
| author |   Eric Dumazet <edumazet@google.com> | 2016-06-18 21:52:06 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-06-18 22:11:39 -0700 |
| commit | 20e1954fe238dbe5f8d3a979e593fe352bd703cf (patch) | |
| tree | 22aced0e24480c8f2c62b89934868e64bbc70baa /include/linux | |
| parent | gre: better support for ICMP messages for gre+ipv6 (diff) | |
| download | linux-dev-20e1954fe238dbe5f8d3a979e593fe352bd703cf.tar.xz linux-dev-20e1954fe238dbe5f8d3a979e593fe352bd703cf.zip | |
ipv6: RFC 4884 partial support for SIT/GRE tunnels
When receiving an ICMPv4 message containing extensions as
defined in RFC 4884, and translating it to ICMPv6 at SIT
or GRE tunnel, we need some extra manipulation in order
to properly forward the extensions.
This patch only takes care of Time Exceeded messages as they
are the ones that typically carry information from various
routers in a fabric during a traceroute session.
It also avoids complex skb logic if the data_len is not
a multiple of 8.
RFC states :
The "original datagram" field MUST contain at least 128 octets.
If the original datagram did not contain 128 octets, the
"original datagram" field MUST be zero padded to 128 octets.
In practice routers use 128 bytes of original datagram, not more.
Initial translation was added in commit ca15a078bd90
("sit: generate icmpv6 error when receiving icmpv4 error")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Oussama Ghorbel <ghorbel@pivasoftware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/icmpv6.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/icmpv6.h b/include/linux/icmpv6.h index 97ae98071a03..57086e9fc64c 100644 --- a/include/linux/icmpv6.h +++ b/include/linux/icmpv6.h @@ -18,7 +18,8 @@ typedef void ip6_icmp_send_t(struct sk_buff *skb, u8 type, u8 code, __u32 info, const struct in6_addr *force_saddr); extern int inet6_register_icmp_sender(ip6_icmp_send_t *fn); extern int inet6_unregister_icmp_sender(ip6_icmp_send_t *fn); -int ip6_err_gen_icmpv6_unreach(struct sk_buff *skb, int nhs, int type); +int ip6_err_gen_icmpv6_unreach(struct sk_buff *skb, int nhs, int type, + unsigned int data_len); #else |