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From: Paolo Abeni <pabeni@redhat.com>
To: mptcp@lists.linux.dev
Subject: [PATCH v2 mptcp-next 1/4] mptcp: clean-up MPJ option writing.
Date: Fri, 26 Nov 2021 13:19:06 +0100	[thread overview]
Message-ID: <4c5e9cc2a8997673798166249b66fef891fe9938.1637929034.git.pabeni@redhat.com> (raw)
In-Reply-To: <cover.1637929034.git.pabeni@redhat.com>

Check for all MPJ variant at once, this reduces the number
of conditionals traversed on average and will simplify the
next patch.

No functional change intended.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
---
 net/mptcp/options.c | 44 +++++++++++++++++++++++---------------------
 1 file changed, 23 insertions(+), 21 deletions(-)

diff --git a/net/mptcp/options.c b/net/mptcp/options.c
index 8a1020e4285c..7a6a39b71633 100644
--- a/net/mptcp/options.c
+++ b/net/mptcp/options.c
@@ -1381,27 +1381,29 @@ void mptcp_write_options(__be32 *ptr, const struct tcp_sock *tp,
 
 		/* MPC is additionally mutually exclusive with MP_PRIO */
 		goto mp_capable_done;
-	} else if (OPTION_MPTCP_MPJ_SYN & opts->suboptions) {
-		*ptr++ = mptcp_option(MPTCPOPT_MP_JOIN,
-				      TCPOLEN_MPTCP_MPJ_SYN,
-				      opts->backup, opts->join_id);
-		put_unaligned_be32(opts->token, ptr);
-		ptr += 1;
-		put_unaligned_be32(opts->nonce, ptr);
-		ptr += 1;
-	} else if (OPTION_MPTCP_MPJ_SYNACK & opts->suboptions) {
-		*ptr++ = mptcp_option(MPTCPOPT_MP_JOIN,
-				      TCPOLEN_MPTCP_MPJ_SYNACK,
-				      opts->backup, opts->join_id);
-		put_unaligned_be64(opts->thmac, ptr);
-		ptr += 2;
-		put_unaligned_be32(opts->nonce, ptr);
-		ptr += 1;
-	} else if (OPTION_MPTCP_MPJ_ACK & opts->suboptions) {
-		*ptr++ = mptcp_option(MPTCPOPT_MP_JOIN,
-				      TCPOLEN_MPTCP_MPJ_ACK, 0, 0);
-		memcpy(ptr, opts->hmac, MPTCPOPT_HMAC_LEN);
-		ptr += 5;
+	} else if (OPTIONS_MPTCP_MPJ & opts->suboptions) {
+		if (OPTION_MPTCP_MPJ_SYN & opts->suboptions) {
+			*ptr++ = mptcp_option(MPTCPOPT_MP_JOIN,
+					      TCPOLEN_MPTCP_MPJ_SYN,
+					      opts->backup, opts->join_id);
+			put_unaligned_be32(opts->token, ptr);
+			ptr += 1;
+			put_unaligned_be32(opts->nonce, ptr);
+			ptr += 1;
+		} else if (OPTION_MPTCP_MPJ_SYNACK & opts->suboptions) {
+			*ptr++ = mptcp_option(MPTCPOPT_MP_JOIN,
+					      TCPOLEN_MPTCP_MPJ_SYNACK,
+					      opts->backup, opts->join_id);
+			put_unaligned_be64(opts->thmac, ptr);
+			ptr += 2;
+			put_unaligned_be32(opts->nonce, ptr);
+			ptr += 1;
+		} else {
+			*ptr++ = mptcp_option(MPTCPOPT_MP_JOIN,
+					      TCPOLEN_MPTCP_MPJ_ACK, 0, 0);
+			memcpy(ptr, opts->hmac, MPTCPOPT_HMAC_LEN);
+			ptr += 5;
+		}
 	} else if (OPTION_MPTCP_ADD_ADDR & opts->suboptions) {
 		u8 len = TCPOLEN_MPTCP_ADD_ADDR_BASE;
 		u8 echo = MPTCP_ADDR_ECHO;
-- 
2.33.1


  reply	other threads:[~2021-11-26 12:19 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-26 12:19 [PATCH v2 mptcp-next 0/4] mptcp: improve subflow creation on errors Paolo Abeni
2021-11-26 12:19 ` Paolo Abeni [this message]
2021-11-26 12:19 ` [PATCH v2 mptcp-next 2/4] mptcp: keep track of used local endpoint Paolo Abeni
2021-11-26 17:53   ` Matthieu Baerts
2021-11-26 12:19 ` [PATCH v2 mptcp-next 3/4] mptcp: do not block subflows creation on errors Paolo Abeni
2021-11-26 17:53   ` Matthieu Baerts
2021-11-29 14:24     ` Paolo Abeni
2021-11-26 12:19 ` [PATCH v2 mptcp-next 4/4] selftests: mptcp: add tests for subflow creation failure Paolo Abeni
2021-11-26 17:57   ` Matthieu Baerts
2021-11-26 15:16 ` [PATCH v2 mptcp-next 0/4] mptcp: improve subflow creation on errors Paolo Abeni

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