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| author | Dmitry Safonov <dima@arista.com> | 2023-10-23 21:22:04 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-10-27 11:35:45 +0200 |
| commit | 0a3a809089eb1d4a0a2fd0c16b520d603988c859 (patch) | |
| tree | b584ef3c79e149b5f9986ed02258d29a48569df8 /include/net/tcp_ao.h | |
| parent | net/tcp: Sign SYN-ACK segments with TCP-AO (diff) | |
| download | linux-0a3a809089eb1d4a0a2fd0c16b520d603988c859.tar.xz linux-0a3a809089eb1d4a0a2fd0c16b520d603988c859.zip | |
net/tcp: Verify inbound TCP-AO signed segments
Now there is a common function to verify signature on TCP segments:
tcp_inbound_hash(). It has checks for all possible cross-interactions
with MD5 signs as well as with unsigned segments.
The rules from RFC5925 are:
(1) Any TCP segment can have at max only one signature.
(2) TCP connections can't switch between using TCP-MD5 and TCP-AO.
(3) TCP-AO connections can't stop using AO, as well as unsigned
connections can't suddenly start using AO.
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 | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/net/tcp_ao.h b/include/net/tcp_ao.h index 1d69978e349a..1c7c0a5d1877 100644 --- a/include/net/tcp_ao.h +++ b/include/net/tcp_ao.h @@ -111,6 +111,9 @@ struct tcp6_ao_context { }; struct tcp_sigpool; +#define TCP_AO_ESTABLISHED (TCPF_ESTABLISHED | TCPF_FIN_WAIT1 | TCPF_FIN_WAIT2 | \ + TCPF_CLOSE | TCPF_CLOSE_WAIT | \ + TCPF_LAST_ACK | TCPF_CLOSING) int tcp_ao_transmit_skb(struct sock *sk, struct sk_buff *skb, struct tcp_ao_key *key, struct tcphdr *th, @@ -130,6 +133,10 @@ int tcp_ao_calc_traffic_key(struct tcp_ao_key *mkt, u8 *key, void *ctx, unsigned int len, struct tcp_sigpool *hp); void tcp_ao_destroy_sock(struct sock *sk, bool twsk); void tcp_ao_time_wait(struct tcp_timewait_sock *tcptw, struct tcp_sock *tp); +enum skb_drop_reason tcp_inbound_ao_hash(struct sock *sk, + const struct sk_buff *skb, unsigned short int family, + const struct request_sock *req, + const struct tcp_ao_hdr *aoh); struct tcp_ao_key *tcp_ao_do_lookup(const struct sock *sk, const union tcp_ao_addr *addr, int family, int sndid, int rcvid); @@ -208,6 +215,13 @@ static inline void tcp_ao_syncookie(struct sock *sk, const struct sk_buff *skb, { } +static inline enum skb_drop_reason tcp_inbound_ao_hash(struct sock *sk, + const struct sk_buff *skb, unsigned short int family, + const struct request_sock *req, const struct tcp_ao_hdr *aoh) +{ + return SKB_NOT_DROPPED_YET; +} + 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) { |