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| author | Dmitry Safonov <dima@arista.com> | 2023-10-23 20:21:56 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-10-27 10:35:44 +0100 |
| commit | 0aadc73995d08f6b0dc061c14a564ffa46f5914e (patch) | |
| tree | d104c5c1772bec3362f2aababc1b5a79ec3e44bc /include/net/tcp_ao.h | |
| parent | 4954f17ddefc51d218625dcdfaf422a253dad3fa (diff) | |
| download | lwn-0aadc73995d08f6b0dc061c14a564ffa46f5914e.tar.gz lwn-0aadc73995d08f6b0dc061c14a564ffa46f5914e.zip | |
net/tcp: Prevent TCP-MD5 with TCP-AO being set
Be as conservative as possible: if there is TCP-MD5 key for a given peer
regardless of L3 interface - don't allow setting TCP-AO key for the same
peer. According to RFC5925, TCP-AO is supposed to replace TCP-MD5 and
there can't be any switch between both on any connected tuple.
Later it can be relaxed, if there's a use, but in the beginning restrict
any intersection.
Note: it's still should be possible to set both TCP-MD5 and TCP-AO keys
on a listening socket for *different* peers.
Co-developed-by: Francesco Ruggeri <fruggeri@arista.com>
Signed-off-by: Francesco Ruggeri <fruggeri@arista.com>
Co-developed-by: Salam Noureddine <noureddine@arista.com>
Signed-off-by: Salam Noureddine <noureddine@arista.com>
Signed-off-by: Dmitry Safonov <dima@arista.com>
Acked-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/tcp_ao.h')
| -rw-r--r-- | include/net/tcp_ao.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/net/tcp_ao.h b/include/net/tcp_ao.h index a81e40fd255a..3c7f576376f9 100644 --- a/include/net/tcp_ao.h +++ b/include/net/tcp_ao.h @@ -92,11 +92,24 @@ struct tcp_ao_info { int tcp_parse_ao(struct sock *sk, int cmd, unsigned short int family, sockptr_t optval, int optlen); void tcp_ao_destroy_sock(struct sock *sk); +struct tcp_ao_key *tcp_ao_do_lookup(const struct sock *sk, + const union tcp_ao_addr *addr, + int family, int sndid, int rcvid); /* ipv4 specific functions */ int tcp_v4_parse_ao(struct sock *sk, int cmd, sockptr_t optval, int optlen); +struct tcp_ao_key *tcp_v4_ao_lookup(const struct sock *sk, struct sock *addr_sk, + int sndid, int rcvid); /* ipv6 specific functions */ int tcp_v6_parse_ao(struct sock *sk, int cmd, sockptr_t optval, int optlen); +struct tcp_ao_key *tcp_v6_ao_lookup(const struct sock *sk, + struct sock *addr_sk, int sndid, int rcvid); #else +static inline struct tcp_ao_key *tcp_ao_do_lookup(const struct sock *sk, + const union tcp_ao_addr *addr, int family, int sndid, int rcvid) +{ + return NULL; +} + static inline void tcp_ao_destroy_sock(struct sock *sk) { } |