netdev - [PATCH net-next 4/5] ipv6: support sport, dport and ip protocol in RTM

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Date:   Mon, 16 Apr 2018 13:41:37 -0700
From:   Roopa Prabhu <roopa@...ulusnetworks.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, dsa@...ulusnetworks.com
Subject: [PATCH net-next 4/5] ipv6: support sport, dport and ip protocol in RTM_GETROUTE

From: Roopa Prabhu <roopa@...ulusnetworks.com>

This is a followup to fib6 rules sport, dport and ip proto
match support. Having them supported in getroute
makes it easier to test fib6 rule lookups. Used by fib6 rule
self tests.

Signed-off-by: Roopa Prabhu <roopa@...ulusnetworks.com>
---
 net/ipv6/route.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 49b954d..5086a80 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -3986,6 +3986,9 @@ static const struct nla_policy rtm_ipv6_policy[RTA_MAX+1] = {
 	[RTA_EXPIRES]		= { .type = NLA_U32 },
 	[RTA_UID]		= { .type = NLA_U32 },
 	[RTA_MARK]		= { .type = NLA_U32 },
+	[RTA_IP_PROTO]		= { .type = NLA_U8 },
+	[RTA_SPORT]		= { .type = NLA_U16 },
+	[RTA_DPORT]		= { .type = NLA_U16 },
 };
 
 static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh,
@@ -4658,6 +4661,17 @@ int rt6_dump_route(struct rt6_info *rt, void *p_arg)
 		     NLM_F_MULTI);
 }
 
+static int nla_get_port(struct nlattr *attr, __be16 *port)
+{
+	int p = nla_get_u16(attr);
+
+	if (p <= 0 || p >= 0xffff)
+		return -EINVAL;
+
+	*port = htons(p);
+	return 0;
+}
+
 static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh,
 			      struct netlink_ext_ack *extack)
 {
@@ -4711,6 +4725,21 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh,
 	else
 		fl6.flowi6_uid = iif ? INVALID_UID : current_uid();
 
+	if (tb[RTA_SPORT]) {
+		err = nla_get_port(tb[RTA_SPORT], &fl6.fl6_sport);
+		if (err)
+			goto errout;
+	}
+
+	if (tb[RTA_DPORT]) {
+		err = nla_get_port(tb[RTA_DPORT], &fl6.fl6_dport);
+		if (err)
+			goto errout;
+	}
+
+	if (tb[RTA_IP_PROTO])
+		fl6.flowi6_proto = nla_get_u8(tb[RTA_IP_PROTO]);
+
 	if (iif) {
 		struct net_device *dev;
 		int flags = 0;
-- 
2.1.4