diff options
| author | Erich E. Hoover <ehoover@mines.edu> | 2012-02-08 10:11:08 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-02-08 21:52:45 +0100 |
| commit | c4062dfc425e94290ac427a98d6b4721dd2bc91f (patch) | |
| tree | 30180df3e11ded7ed8ea2c3c4525092d0711f1af | |
| parent | ipv4: Implement IP_UNICAST_IF socket option. (diff) | |
| download | linux-c4062dfc425e94290ac427a98d6b4721dd2bc91f.tar.xz linux-c4062dfc425e94290ac427a98d6b4721dd2bc91f.zip | |
ipv6: Implement IPV6_UNICAST_IF socket option.
The IPV6_UNICAST_IF feature is the IPv6 compliment to IP_UNICAST_IF.
Signed-off-by: Erich E. Hoover <ehoover@mines.edu>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/linux/in6.h | 1 | ||||
| -rw-r--r-- | include/linux/ipv6.h | 1 | ||||
| -rw-r--r-- | net/ipv6/icmp.c | 4 | ||||
| -rw-r--r-- | net/ipv6/ipv6_sockglue.c | 34 | ||||
| -rw-r--r-- | net/ipv6/raw.c | 2 | ||||
| -rw-r--r-- | net/ipv6/udp.c | 3 |
6 files changed, 44 insertions, 1 deletions
diff --git a/include/linux/in6.h b/include/linux/in6.h index 097a34b55560..5c83d9e3eb8f 100644 --- a/include/linux/in6.h +++ b/include/linux/in6.h @@ -271,6 +271,7 @@ struct in6_flowlabel_req { #define IPV6_ORIGDSTADDR 74 #define IPV6_RECVORIGDSTADDR IPV6_ORIGDSTADDR #define IPV6_TRANSPARENT 75 +#define IPV6_UNICAST_IF 76 /* * Multicast Routing: diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h index 6318268dcaf5..743a16a41040 100644 --- a/include/linux/ipv6.h +++ b/include/linux/ipv6.h @@ -324,6 +324,7 @@ struct ipv6_pinfo { __unused_2:6; __s16 mcast_hops:9; #endif + int ucast_oif; int mcast_oif; /* pktoption flags */ diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c index 01d46bff63c3..af88934e4d79 100644 --- a/net/ipv6/icmp.c +++ b/net/ipv6/icmp.c @@ -468,6 +468,8 @@ void icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info) if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) fl6.flowi6_oif = np->mcast_oif; + else if (!fl6.flowi6_oif) + fl6.flowi6_oif = np->ucast_oif; dst = icmpv6_route_lookup(net, skb, sk, &fl6); if (IS_ERR(dst)) @@ -553,6 +555,8 @@ static void icmpv6_echo_reply(struct sk_buff *skb) if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) fl6.flowi6_oif = np->mcast_oif; + else if (!fl6.flowi6_oif) + fl6.flowi6_oif = np->ucast_oif; err = ip6_dst_lookup(sk, &dst, &fl6); if (err) diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c index 18a2719003c3..6d6b65fdaa1a 100644 --- a/net/ipv6/ipv6_sockglue.c +++ b/net/ipv6/ipv6_sockglue.c @@ -516,6 +516,36 @@ done: retv = 0; break; + case IPV6_UNICAST_IF: + { + struct net_device *dev = NULL; + int ifindex; + + if (optlen != sizeof(int)) + goto e_inval; + + ifindex = (__force int)ntohl((__force __be32)val); + if (ifindex == 0) { + np->ucast_oif = 0; + retv = 0; + break; + } + + dev = dev_get_by_index(net, ifindex); + retv = -EADDRNOTAVAIL; + if (!dev) + break; + dev_put(dev); + + retv = -EINVAL; + if (sk->sk_bound_dev_if) + break; + + np->ucast_oif = ifindex; + retv = 0; + break; + } + case IPV6_MULTICAST_IF: if (sk->sk_type == SOCK_STREAM) break; @@ -1160,6 +1190,10 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname, val = np->mcast_oif; break; + case IPV6_UNICAST_IF: + val = (__force int)htonl((__u32) np->ucast_oif); + break; + case IPV6_MTU_DISCOVER: val = np->pmtudisc; break; diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c index d02f7e4dd611..5bddea778840 100644 --- a/net/ipv6/raw.c +++ b/net/ipv6/raw.c @@ -856,6 +856,8 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) fl6.flowi6_oif = np->mcast_oif; + else if (!fl6.flowi6_oif) + fl6.flowi6_oif = np->ucast_oif; security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); dst = ip6_dst_lookup_flow(sk, &fl6, final_p, true); diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c index 4f96b5c63685..8aebf8f90436 100644 --- a/net/ipv6/udp.c +++ b/net/ipv6/udp.c @@ -1130,7 +1130,8 @@ do_udp_sendmsg: if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr)) { fl6.flowi6_oif = np->mcast_oif; connected = 0; - } + } else if (!fl6.flowi6_oif) + fl6.flowi6_oif = np->ucast_oif; security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); |