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author | Eric Dumazet <edumazet@google.com> | 2015-03-12 01:53:14 (GMT) |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2015-03-12 01:55:28 (GMT) |
commit | 33cf7c90fe2f97afb1cadaa0cfb782cb9d1b9ee2 (patch) | |
tree | 7a0c80d0b2bb618919d966ce5b827c7eb8f843f6 /include/net/inet_sock.h | |
parent | 654eff45166c7e89d18fc476325c975768b2e347 (diff) | |
download | linux-33cf7c90fe2f97afb1cadaa0cfb782cb9d1b9ee2.tar.xz |
net: add real socket cookies
A long standing problem in netlink socket dumps is the use
of kernel socket addresses as cookies.
1) It is a security concern.
2) Sockets can be reused quite quickly, so there is
no guarantee a cookie is used once and identify
a flow.
3) request sock, establish sock, and timewait socks
for a given flow have different cookies.
Part of our effort to bring better TCP statistics requires
to switch to a different allocator.
In this patch, I chose to use a per network namespace 64bit generator,
and to use it only in the case a socket needs to be dumped to netlink.
(This might be refined later if needed)
Note that I tried to carry cookies from request sock, to establish sock,
then timewait sockets.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Eric Salo <salo@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/inet_sock.h')
-rw-r--r-- | include/net/inet_sock.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h index eb16c7b..e565afd 100644 --- a/include/net/inet_sock.h +++ b/include/net/inet_sock.h @@ -77,6 +77,8 @@ struct inet_request_sock { #define ir_v6_rmt_addr req.__req_common.skc_v6_daddr #define ir_v6_loc_addr req.__req_common.skc_v6_rcv_saddr #define ir_iif req.__req_common.skc_bound_dev_if +#define ir_cookie req.__req_common.skc_cookie +#define ireq_net req.__req_common.skc_net kmemcheck_bitfield_begin(flags); u16 snd_wscale : 4, |