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authorCraig Gallek <kraig@google.com>2015-06-15 11:26:20 -0400
committerDavid S. Miller <davem@davemloft.net>2015-06-15 19:49:22 -0700
commit35ac838a9b96470f999db04320f53a2033642bfb (patch)
tree19ed0663ecfc90d53e8a449f28b25206e0c9a5f6 /net/ipv4/tcp.c
parent3fd22af808f4d7455ba91596d334438c7ee0f889 (diff)
sock_diag: implement a get_info handler for inet
This get_info handler will simply dispatch to the appropriate existing inet protocol handler. This patch also includes a new netlink attribute (INET_DIAG_PROTOCOL). This attribute is currently only used for multicast messages. Without this attribute, there is no way of knowing the IP protocol used by the socket information being broadcast. This attribute is not necessary in the 'dump' variant of this protocol (though it could easily be added) because dump requests are issued for specific family/protocol pairs. Tested: ss -E (note, the -E option has not yet been merged into the upstream version of ss). Signed-off-by: Craig Gallek <kraig@google.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp.c')
-rw-r--r--net/ipv4/tcp.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 65f791f74845..697b86dd45b3 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2624,13 +2624,15 @@ EXPORT_SYMBOL(compat_tcp_setsockopt);
/* Return information about state of tcp endpoint in API format. */
void tcp_get_info(struct sock *sk, struct tcp_info *info)
{
- const struct tcp_sock *tp = tcp_sk(sk);
+ const struct tcp_sock *tp = tcp_sk(sk); /* iff sk_type == SOCK_STREAM */
const struct inet_connection_sock *icsk = inet_csk(sk);
u32 now = tcp_time_stamp;
unsigned int start;
u32 rate;
memset(info, 0, sizeof(*info));
+ if (sk->sk_type != SOCK_STREAM)
+ return;
info->tcpi_state = sk->sk_state;
info->tcpi_ca_state = icsk->icsk_ca_state;