From: Dmitry Safonov <dima@arista.com>
To: David Ahern <dsahern@kernel.org>,
Eric Dumazet <edumazet@google.com>,
Paolo Abeni <pabeni@redhat.com>, Jakub Kicinski <kuba@kernel.org>,
"David S. Miller" <davem@davemloft.net>
Cc: linux-kernel@vger.kernel.org, Dmitry Safonov <dima@arista.com>,
Andy Lutomirski <luto@amacapital.net>,
Ard Biesheuvel <ardb@kernel.org>,
Bob Gilligan <gilligan@arista.com>,
Dan Carpenter <error27@gmail.com>,
David Laight <David.Laight@aculab.com>,
Dmitry Safonov <0x7f454c46@gmail.com>,
Donald Cassidy <dcassidy@redhat.com>,
Eric Biggers <ebiggers@kernel.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Francesco Ruggeri <fruggeri05@gmail.com>,
"Gaillardetz, Dominik" <dgaillar@ciena.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
Ivan Delalande <colona@arista.com>,
Leonard Crestez <cdleonard@gmail.com>,
Salam Noureddine <noureddine@arista.com>,
"Tetreault, Francois" <ftetreau@ciena.com>,
netdev@vger.kernel.org
Subject: [PATCH v8 17/23] net/tcp: Add option for TCP-AO to (not) hash header
Date: Wed, 19 Jul 2023 21:26:22 +0100 [thread overview]
Message-ID: <20230719202631.472019-18-dima@arista.com> (raw)
In-Reply-To: <20230719202631.472019-1-dima@arista.com>
Provide setsockopt() key flag that makes TCP-AO exclude hashing TCP
header for peers that match the key. This is needed for interraction
with middleboxes that may change TCP options, see RFC5925 (9.2).
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>
---
include/uapi/linux/tcp.h | 5 +++++
net/ipv4/tcp_ao.c | 8 +++++---
2 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/include/uapi/linux/tcp.h b/include/uapi/linux/tcp.h
index ca7ed18ce67b..3275ade3293a 100644
--- a/include/uapi/linux/tcp.h
+++ b/include/uapi/linux/tcp.h
@@ -354,6 +354,11 @@ struct tcp_diag_md5sig {
#define TCP_AO_MAXKEYLEN 80
#define TCP_AO_KEYF_IFINDEX (1 << 0) /* L3 ifindex for VRF */
+#define TCP_AO_KEYF_EXCLUDE_OPT (1 << 1) /* "Indicates whether TCP
+ * options other than TCP-AO
+ * are included in the MAC
+ * calculation"
+ */
struct tcp_ao_add { /* setsockopt(TCP_AO_ADD_KEY) */
struct __kernel_sockaddr_storage addr; /* peer's address for the key */
diff --git a/net/ipv4/tcp_ao.c b/net/ipv4/tcp_ao.c
index 4bde58ede63a..4fabd3ec5c71 100644
--- a/net/ipv4/tcp_ao.c
+++ b/net/ipv4/tcp_ao.c
@@ -567,7 +567,8 @@ int tcp_ao_hash_hdr(unsigned short int family, char *ao_hash,
WARN_ON_ONCE(1);
goto clear_hash;
}
- if (tcp_ao_hash_header(&hp, th, false,
+ if (tcp_ao_hash_header(&hp, th,
+ !!(key->keyflags & TCP_AO_KEYF_EXCLUDE_OPT),
ao_hash, hash_offset, tcp_ao_maclen(key)))
goto clear_hash;
ahash_request_set_crypt(hp.req, NULL, hash_buf, 0);
@@ -615,7 +616,8 @@ int tcp_ao_hash_skb(unsigned short int family,
goto clear_hash;
if (tcp_ao_hash_pseudoheader(family, sk, skb, &hp, skb->len))
goto clear_hash;
- if (tcp_ao_hash_header(&hp, th, false,
+ if (tcp_ao_hash_header(&hp, th,
+ !!(key->keyflags & TCP_AO_KEYF_EXCLUDE_OPT),
ao_hash, hash_offset, tcp_ao_maclen(key)))
goto clear_hash;
if (tcp_sigpool_hash_skb_data(&hp, skb, th->doff << 2))
@@ -1430,7 +1432,7 @@ static struct tcp_ao_info *setsockopt_ao_info(struct sock *sk)
return ERR_PTR(-ESOCKTNOSUPPORT);
}
-#define TCP_AO_KEYF_ALL (0)
+#define TCP_AO_KEYF_ALL (TCP_AO_KEYF_EXCLUDE_OPT)
static struct tcp_ao_key *tcp_ao_key_alloc(struct sock *sk,
struct tcp_ao_add *cmd)
--
2.41.0
next prev parent reply other threads:[~2023-07-19 20:27 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-19 20:26 [PATCH v8 00/23] net/tcp: Add TCP-AO support Dmitry Safonov
2023-07-19 20:26 ` [PATCH v8 01/23] net/tcp: Prepare tcp_md5sig_pool for TCP-AO Dmitry Safonov
2023-07-19 20:26 ` [PATCH v8 02/23] net/tcp: Add TCP-AO config and structures Dmitry Safonov
2023-07-19 20:26 ` [PATCH v8 03/23] net/tcp: Introduce TCP_AO setsockopt()s Dmitry Safonov
2023-07-19 20:26 ` [PATCH v8 04/23] net/tcp: Prevent TCP-MD5 with TCP-AO being set Dmitry Safonov
2023-07-19 20:26 ` [PATCH v8 05/23] net/tcp: Calculate TCP-AO traffic keys Dmitry Safonov
2023-07-19 20:26 ` [PATCH v8 06/23] net/tcp: Add TCP-AO sign to outgoing packets Dmitry Safonov
2023-07-19 20:26 ` [PATCH v8 07/23] net/tcp: Add tcp_parse_auth_options() Dmitry Safonov
2023-07-19 20:26 ` [PATCH v8 08/23] net/tcp: Add AO sign to RST packets Dmitry Safonov
2023-07-19 20:26 ` [PATCH v8 09/23] net/tcp: Add TCP-AO sign to twsk Dmitry Safonov
2023-07-19 20:26 ` [PATCH v8 10/23] net/tcp: Wire TCP-AO to request sockets Dmitry Safonov
2023-07-19 20:26 ` [PATCH v8 11/23] net/tcp: Sign SYN-ACK segments with TCP-AO Dmitry Safonov
2023-07-19 20:26 ` [PATCH v8 12/23] net/tcp: Verify inbound TCP-AO signed segments Dmitry Safonov
2023-07-19 20:26 ` [PATCH v8 13/23] net/tcp: Add TCP-AO segments counters Dmitry Safonov
2023-07-19 20:26 ` [PATCH v8 14/23] net/tcp: Add TCP-AO SNE support Dmitry Safonov
2023-07-19 20:26 ` [PATCH v8 15/23] net/tcp: Add tcp_hash_fail() ratelimited logs Dmitry Safonov
2023-07-19 20:26 ` [PATCH v8 16/23] net/tcp: Ignore specific ICMPs for TCP-AO connections Dmitry Safonov
2023-07-19 20:26 ` Dmitry Safonov [this message]
2023-07-19 20:26 ` [PATCH v8 18/23] net/tcp: Add TCP-AO getsockopt()s Dmitry Safonov
2023-07-19 20:26 ` [PATCH v8 19/23] net/tcp: Allow asynchronous delete for TCP-AO keys (MKTs) Dmitry Safonov
2023-07-19 20:26 ` [PATCH v8 20/23] net/tcp: Add static_key for TCP-AO Dmitry Safonov
2023-07-19 20:26 ` [PATCH v8 21/23] net/tcp: Wire up l3index to TCP-AO Dmitry Safonov
2023-07-19 20:26 ` [PATCH v8 22/23] net/tcp: Add TCP_AO_REPAIR Dmitry Safonov
2023-07-19 20:26 ` [PATCH v8 23/23] Documentation/tcp: Add TCP-AO documentation Dmitry Safonov
2023-07-20 17:53 ` [PATCH v8 00/23] net/tcp: Add TCP-AO support Jakub Kicinski
2023-07-20 20:41 ` Dmitry Safonov
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