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authorJiri Bohac <jbohac@suse.cz>2013-08-30 11:18:45 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-09-14 05:50:48 -0700
commit2eeeacf627ab4bac67c3c1735b2c96fccbea6262 (patch)
tree76496069ee765d2ef8b2420219bbe9d959a8ccee
parent238d6ce5d070b4f95a3deeaf979d8c7e30d7de5d (diff)
ICMPv6: treat dest unreachable codes 5 and 6 as EACCES, not EPROTO
[ Upstream commit 61e76b178dbe7145e8d6afa84bb4ccea71918994 ] RFC 4443 has defined two additional codes for ICMPv6 type 1 (destination unreachable) messages: 5 - Source address failed ingress/egress policy 6 - Reject route to destination Now they are treated as protocol error and icmpv6_err_convert() converts them to EPROTO. RFC 4443 says: "Codes 5 and 6 are more informative subsets of code 1." Treat codes 5 and 6 as code 1 (EACCES) Btw, connect() returning -EPROTO confuses firefox, so that fallback to other/IPv4 addresses does not work: https://bugzilla.mozilla.org/show_bug.cgi?id=910773 Signed-off-by: Jiri Bohac <jbohac@suse.cz> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--include/linux/icmpv6.h2
-rw-r--r--net/ipv6/icmp.c10
2 files changed, 11 insertions, 1 deletions
diff --git a/include/linux/icmpv6.h b/include/linux/icmpv6.h
index ba45e6bc0764..f5a21d0a22ba 100644
--- a/include/linux/icmpv6.h
+++ b/include/linux/icmpv6.h
@@ -123,6 +123,8 @@ static inline struct icmp6hdr *icmp6_hdr(const struct sk_buff *skb)
#define ICMPV6_NOT_NEIGHBOUR 2
#define ICMPV6_ADDR_UNREACH 3
#define ICMPV6_PORT_UNREACH 4
+#define ICMPV6_POLICY_FAIL 5
+#define ICMPV6_REJECT_ROUTE 6
/*
* Codes for Time Exceeded
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 11900417b1cc..a51d1879684f 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -917,6 +917,14 @@ static const struct icmp6_err {
.err = ECONNREFUSED,
.fatal = 1,
},
+ { /* POLICY_FAIL */
+ .err = EACCES,
+ .fatal = 1,
+ },
+ { /* REJECT_ROUTE */
+ .err = EACCES,
+ .fatal = 1,
+ },
};
int icmpv6_err_convert(u8 type, u8 code, int *err)
@@ -928,7 +936,7 @@ int icmpv6_err_convert(u8 type, u8 code, int *err)
switch (type) {
case ICMPV6_DEST_UNREACH:
fatal = 1;
- if (code <= ICMPV6_PORT_UNREACH) {
+ if (code < ARRAY_SIZE(tab_unreach)) {
*err = tab_unreach[code].err;
fatal = tab_unreach[code].fatal;
}