netdev - [PATCH iproute2-next 2/6] bridge: mdb: Split source parsing to a separate function

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Date:   Thu, 15 Dec 2022 19:52:26 +0200
From:   Ido Schimmel <idosch@...dia.com>
To:     netdev@...r.kernel.org
Cc:     dsahern@...il.com, stephen@...workplumber.org, razor@...ckwall.org,
        mlxsw@...dia.com, Ido Schimmel <idosch@...dia.com>
Subject: [PATCH iproute2-next 2/6] bridge: mdb: Split source parsing to a separate function

Currently, the only attribute inside the 'MDBA_SET_ENTRY_ATTRS' nest is
'MDBE_ATTR_SOURCE', but subsequent patches are going to add more
attributes to the nest.

Prepare for the addition of these attributes by splitting the parsing of
individual attributes inside the nest to separate functions.

Signed-off-by: Ido Schimmel <idosch@...dia.com>
---
 bridge/mdb.c | 34 ++++++++++++++++++++++++----------
 1 file changed, 24 insertions(+), 10 deletions(-)

diff --git a/bridge/mdb.c b/bridge/mdb.c
index 4ae91f15dac8..64db2ee03c42 100644
--- a/bridge/mdb.c
+++ b/bridge/mdb.c
@@ -474,6 +474,25 @@ static int mdb_parse_grp(const char *grp, struct br_mdb_entry *e)
 	return -1;
 }
 
+static int mdb_parse_src(struct nlmsghdr *n, int maxlen, const char *src)
+{
+	struct in6_addr src_ip6;
+	__be32 src_ip4;
+
+	if (inet_pton(AF_INET, src, &src_ip4)) {
+		addattr32(n, maxlen, MDBE_ATTR_SOURCE, src_ip4);
+		return 0;
+	}
+
+	if (inet_pton(AF_INET6, src, &src_ip6)) {
+		addattr_l(n, maxlen, MDBE_ATTR_SOURCE, &src_ip6,
+			  sizeof(src_ip6));
+		return 0;
+	}
+
+	return -1;
+}
+
 static int mdb_modify(int cmd, int flags, int argc, char **argv)
 {
 	struct {
@@ -543,19 +562,14 @@ static int mdb_modify(int cmd, int flags, int argc, char **argv)
 	if (set_attrs) {
 		struct rtattr *nest = addattr_nest(&req.n, sizeof(req),
 						   MDBA_SET_ENTRY_ATTRS);
-		struct in6_addr src_ip6;
-		__be32 src_ip4;
 
 		nest->rta_type |= NLA_F_NESTED;
-		if (!inet_pton(AF_INET, src, &src_ip4)) {
-			if (!inet_pton(AF_INET6, src, &src_ip6)) {
-				fprintf(stderr, "Invalid source address \"%s\"\n", src);
-				return -1;
-			}
-			addattr_l(&req.n, sizeof(req), MDBE_ATTR_SOURCE, &src_ip6, sizeof(src_ip6));
-		} else {
-			addattr32(&req.n, sizeof(req), MDBE_ATTR_SOURCE, src_ip4);
+
+		if (src && mdb_parse_src(&req.n, sizeof(req), src)) {
+			fprintf(stderr, "Invalid source address \"%s\"\n", src);
+			return -1;
 		}
+
 		addattr_nest_end(&req.n, nest);
 	}
 
-- 
2.37.3