diff options
| author | Hannes Frederic Sowa <hannes@stressinduktion.org> | 2014-01-20 02:43:08 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-01-20 03:53:18 (GMT) |
| commit | 4b261c75a99f29c93a0b6babfc180cdf566bd654 (patch) | |
| tree | 2c1fcebd79d2fcb1625f89ef5067605151953010 /net/ipv4/ip_sockglue.c | |
| parent | a6e2fe17eba47681e82cdb9cfed5a67b57802a78 (diff) | |
| download | linux-4b261c75a99f29c93a0b6babfc180cdf566bd654.tar.xz | |
ipv6: make IPV6_RECVPKTINFO work for ipv4 datagrams
We currently don't report IPV6_RECVPKTINFO in cmsg access ancillary data
for IPv4 datagrams on IPv6 sockets.
This patch splits the ip6_datagram_recv_ctl into two functions, one
which handles both protocol families, AF_INET and AF_INET6, while the
ip6_datagram_recv_specific_ctl only handles IPv6 cmsg data.
ip6_datagram_recv_*_ctl never reported back any errors, so we can make
them return void. Also provide a helper for protocols which don't offer dual
personality to further use ip6_datagram_recv_ctl, which is exported to
modules.
I needed to shuffle the code for ping around a bit to make it easier to
implement dual personality for ping ipv6 sockets in future.
Reported-by: Gert Doering <gert@space.net>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ip_sockglue.c')
| -rw-r--r-- | net/ipv4/ip_sockglue.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c index 22f15eb..580dd96 100644 --- a/net/ipv4/ip_sockglue.c +++ b/net/ipv4/ip_sockglue.c @@ -56,7 +56,6 @@ /* * SOL_IP control messages. */ -#define PKTINFO_SKB_CB(__skb) ((struct in_pktinfo *)((__skb)->cb)) static void ip_cmsg_recv_pktinfo(struct msghdr *msg, struct sk_buff *skb) { @@ -1055,9 +1054,10 @@ e_inval: void ipv4_pktinfo_prepare(const struct sock *sk, struct sk_buff *skb) { struct in_pktinfo *pktinfo = PKTINFO_SKB_CB(skb); + bool prepare = (inet_sk(sk)->cmsg_flags & IP_CMSG_PKTINFO) || + ipv6_sk_rxinfo(sk); - if ((inet_sk(sk)->cmsg_flags & IP_CMSG_PKTINFO) && - skb_rtable(skb)) { + if (prepare && skb_rtable(skb)) { pktinfo->ipi_ifindex = inet_iif(skb); pktinfo->ipi_spec_dst.s_addr = fib_compute_spec_dst(skb); } else { |