Re: [PATCH RFC net-next 1/4] ipv4: fib_rules: support match on sport, dport and ip proto

From: Roopa Prabhu <redacted>

Add support to match on src port, dst port and ip protocol.

Signed-off-by: Roopa Prabhu <redacted>
---
 include/uapi/linux/fib_rules.h |  3 +++
 net/ipv4/fib_rules.c           | 46 ++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 47 insertions(+), 2 deletions(-)

diff --git a/include/uapi/linux/fib_rules.h b/include/uapi/linux/fib_rules.h
index 2b642bf..79ff3c2 100644
--- a/include/uapi/linux/fib_rules.h
+++ b/include/uapi/linux/fib_rules.h

@@ -58,6 +58,9 @@ enum {
 	FRA_PAD,
 	FRA_L3MDEV,	/* iif or oif is l3mdev goto its table */
 	FRA_UID_RANGE,	/* UID range */
+	FRA_PROTO,	/* ip proto */
+	FRA_SPORT,	/* sport */
+	FRA_DPORT,	/* dport */
 	__FRA_MAX
 };
 

diff --git a/net/ipv4/fib_rules.c b/net/ipv4/fib_rules.c
index 35d646a..f204c85 100644
--- a/net/ipv4/fib_rules.c
+++ b/net/ipv4/fib_rules.c

@@ -45,13 +45,17 @@ struct fib4_rule {
 #ifdef CONFIG_IP_ROUTE_CLASSID
 	u32			tclassid;
 #endif
+	__be16			sport;
+	__be16			dport;
+	u8			proto;
 };
 
 static bool fib4_rule_matchall(const struct fib_rule *rule)
 {
 	struct fib4_rule *r = container_of(rule, struct fib4_rule, common);
 
-	if (r->dst_len || r->src_len || r->tos)
+	if (r->dst_len || r->src_len || r->tos || r->proto || r->sport ||
+	    r->dport)
 		return false;
 	return fib_rule_matchall(rule);
 }

@@ -182,6 +186,15 @@ static int fib4_rule_match(struct fib_rule *rule, struct flowi *fl, int flags)
 	if (r->tos && (r->tos != fl4->flowi4_tos))
 		return 0;
 
+	if (r->proto && (r->proto != fl4->flowi4_proto))
+		return 0;
+
+	if (r->sport && (r->sport != fl4->fl4_sport))
+		return 0;
+
+	if (r->dport && (r->dport != fl4->fl4_dport))
+		return 0;
+