netdev - [PATCH iproute2 1/4] tc: m_ife: allow ife type to zero

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Message-Id: <20170828190738.26829-2-aring@mojatatu.com>
Date:   Mon, 28 Aug 2017 15:07:35 -0400
From:   Alexander Aring <aring@...atatu.com>
To:     jhs@...atatu.com
Cc:     yotamg@...lanox.com, xiyou.wangcong@...il.com, jiri@...nulli.us,
        netdev@...r.kernel.org, Alexander Aring <aring@...atatu.com>
Subject: [PATCH iproute2 1/4] tc: m_ife: allow ife type to zero

This patch allows to set an ethertype for IFE which is zero. There is no
kernel side validation which forbids a type to zero.

Signed-off-by: Alexander Aring <aring@...atatu.com>
---
 tc/m_ife.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tc/m_ife.c b/tc/m_ife.c
index e3521e62..e05e2276 100644
--- a/tc/m_ife.c
+++ b/tc/m_ife.c
@@ -63,6 +63,7 @@ static int parse_ife(struct action_util *a, int *argc_p, char ***argv_p,
 	char dbuf[ETH_ALEN];
 	char sbuf[ETH_ALEN];
 	__u16 ife_type = 0;
+	int user_type = 0;
 	__u32 ife_prio = 0;
 	__u32 ife_prio_v = 0;
 	__u32 ife_mark = 0;
@@ -125,6 +126,7 @@ static int parse_ife(struct action_util *a, int *argc_p, char ***argv_p,
 			if (get_u16(&ife_type, *argv, 0))
 				invarg("ife type is invalid", *argv);
 			fprintf(stderr, "IFE type 0x%x\n", ife_type);
+			user_type = 1;
 		} else if (matches(*argv, "dst") == 0) {
 			NEXT_ARG();
 			daddr = *argv;
@@ -185,7 +187,7 @@ static int parse_ife(struct action_util *a, int *argc_p, char ***argv_p,
 
 	if (daddr)
 		addattr_l(n, MAX_MSG, TCA_IFE_DMAC, dbuf, ETH_ALEN);
-	if (ife_type)
+	if (user_type)
 		addattr_l(n, MAX_MSG, TCA_IFE_TYPE, &ife_type, 2);
 	if (saddr)
 		addattr_l(n, MAX_MSG, TCA_IFE_SMAC, sbuf, ETH_ALEN);
-- 
2.11.0