diff options
| author | Vlad Yasevich <vladislav.yasevich@hp.com> | 2009-03-24 16:24:51 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-03-25 02:49:11 (GMT) |
| commit | b2f5e7cd3dee2ed721bf0675e1a1ddebb849aee6 (patch) | |
| tree | a7b48c260a3cb0050ad6198c6a50b52b318dfcb8 /net/ipv6/udp.c | |
| parent | 63d9950b08184e6531adceb65f64b429909cc101 (diff) | |
| download | linux-b2f5e7cd3dee2ed721bf0675e1a1ddebb849aee6.tar.xz | |
ipv6: Fix conflict resolutions during ipv6 binding
The ipv6 version of bind_conflict code calls ipv6_rcv_saddr_equal()
which at times wrongly identified intersections between addresses.
It particularly broke down under a few instances and caused erroneous
bind conflicts.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/udp.c')
| -rw-r--r-- | net/ipv6/udp.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c index 84b1a29..6842dd2 100644 --- a/net/ipv6/udp.c +++ b/net/ipv6/udp.c @@ -49,6 +49,34 @@ #include <linux/seq_file.h> #include "udp_impl.h" +int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2) +{ + const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr; + const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2); + int sk_ipv6only = ipv6_only_sock(sk); + int sk2_ipv6only = inet_v6_ipv6only(sk2); + int addr_type = ipv6_addr_type(sk_rcv_saddr6); + int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED; + + /* if both are mapped, treat as IPv4 */ + if (addr_type == IPV6_ADDR_MAPPED && addr_type2 == IPV6_ADDR_MAPPED) + return ipv4_rcv_saddr_equal(sk, sk2); + + if (addr_type2 == IPV6_ADDR_ANY && + !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED)) + return 1; + + if (addr_type == IPV6_ADDR_ANY && + !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED)) + return 1; + + if (sk2_rcv_saddr6 && + ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6)) + return 1; + + return 0; +} + int udp_v6_get_port(struct sock *sk, unsigned short snum) { return udp_lib_get_port(sk, snum, ipv6_rcv_saddr_equal); |