netdev - [PATCH iproute2-next 2/9] iproute: make printing icmpv6 a function

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Message-Id: <20180207171017.20558-3-sthemmin@microsoft.com>
Date:   Wed,  7 Feb 2018 09:10:10 -0800
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     dsahern@...il.com
Cc:     netdev@...r.kernel.org, Stephen Hemminger <sthemmin@...rosoft.com>,
        Stephen Hemminger <stephen@...workplumber.org>
Subject: [PATCH iproute2-next 2/9] iproute: make printing icmpv6 a function

Refactor to reduce size of print_route and improve
readability.

Signed-off-by: Stephen Hemminger <stephen@...workplumber.org>
---
 ip/iproute.c | 38 +++++++++++++++++++++-----------------
 1 file changed, 21 insertions(+), 17 deletions(-)

diff --git a/ip/iproute.c b/ip/iproute.c
index 024f1cd87cbb..da6a4faed836 100644
--- a/ip/iproute.c
+++ b/ip/iproute.c
@@ -363,6 +363,25 @@ static void print_rt_flags(FILE *fp, unsigned int flags)
 		fprintf(fp, "unresolved ");
 }
 
+static void print_rt_pref(FILE *fp, unsigned int pref)
+{
+	fprintf(fp, "pref ");
+
+	switch (pref) {
+	case ICMPV6_ROUTER_PREF_LOW:
+		fprintf(fp, "low");
+		break;
+	case ICMPV6_ROUTER_PREF_MEDIUM:
+		fprintf(fp, "medium");
+		break;
+	case ICMPV6_ROUTER_PREF_HIGH:
+		fprintf(fp, "high");
+		break;
+	default:
+		fprintf(fp, "%u", pref);
+	}
+}
+
 int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 {
 	FILE *fp = (FILE *)arg;
@@ -740,25 +759,10 @@ int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 			nh = RTNH_NEXT(nh);
 		}
 	}
-	if (tb[RTA_PREF]) {
-		unsigned int pref = rta_getattr_u8(tb[RTA_PREF]);
 
-		fprintf(fp, "pref ");
+	if (tb[RTA_PREF])
+		print_rt_pref(fp, rta_getattr_u8(tb[RTA_PREF]));
 
-		switch (pref) {
-		case ICMPV6_ROUTER_PREF_LOW:
-			fprintf(fp, "low");
-			break;
-		case ICMPV6_ROUTER_PREF_MEDIUM:
-			fprintf(fp, "medium");
-			break;
-		case ICMPV6_ROUTER_PREF_HIGH:
-			fprintf(fp, "high");
-			break;
-		default:
-			fprintf(fp, "%u", pref);
-		}
-	}
 	if (tb[RTA_TTL_PROPAGATE]) {
 		fprintf(fp, "ttl-propagate ");
 		if (rta_getattr_u8(tb[RTA_TTL_PROPAGATE]))
-- 
2.15.1