netdev - [PATCH iproute2-next 3/9] iproute: make printing IPv4 cache flags a function

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Date:   Wed,  7 Feb 2018 09:10:11 -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 3/9] iproute: make printing IPv4 cache flags a function

More refactoring prior to JSON support.

Signed-off-by: Stephen Hemminger <stephen@...workplumber.org>
---
 ip/iproute.c | 65 ++++++++++++++++++++++++++++++++++++------------------------
 1 file changed, 39 insertions(+), 26 deletions(-)

diff --git a/ip/iproute.c b/ip/iproute.c
index da6a4faed836..7317bf116e2c 100644
--- a/ip/iproute.c
+++ b/ip/iproute.c
@@ -382,6 +382,43 @@ static void print_rt_pref(FILE *fp, unsigned int pref)
 	}
 }
 
+static void print_cache_flags(FILE *fp, __u32 flags)
+{
+	flags &= ~0xFFFF;
+
+	fprintf(fp, "%s    cache ", _SL_);
+
+	if (flags == 0)
+		return;
+
+	putc('<', fp);
+
+#define PRTFL(fl, flname)						\
+	if (flags & RTCF_##fl) {					\
+		flags &= ~RTCF_##fl;					\
+		fprintf(fp, "%s%s", flname, flags ? "," : "> ");	\
+	}
+
+	PRTFL(LOCAL, "local");
+	PRTFL(REJECT, "reject");
+	PRTFL(MULTICAST, "mc");
+	PRTFL(BROADCAST, "brd");
+	PRTFL(DNAT, "dst-nat");
+	PRTFL(SNAT, "src-nat");
+	PRTFL(MASQ, "masq");
+	PRTFL(DIRECTDST, "dst-direct");
+	PRTFL(DIRECTSRC, "src-direct");
+	PRTFL(REDIRECTED, "redirected");
+	PRTFL(DOREDIRECT, "redirect");
+	PRTFL(FAST, "fastroute");
+	PRTFL(NOTIFY, "notify");
+	PRTFL(TPROXY, "proxy");
+#undef PRTFL
+
+	if (flags)
+		fprintf(fp, "%#x> ", flags);
+}
+
 int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 {
 	FILE *fp = (FILE *)arg;
@@ -544,33 +581,9 @@ int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
 	if (tb[RTA_UID])
 		fprintf(fp, "uid %u ", rta_getattr_u32(tb[RTA_UID]));
 
-	if ((r->rtm_flags&RTM_F_CLONED) && r->rtm_family == AF_INET) {
-		__u32 flags = r->rtm_flags&~0xFFFF;
-		int first = 1;
+	if ((r->rtm_flags & RTM_F_CLONED) && r->rtm_family == AF_INET) {
+		print_cache_flags(fp, r->rtm_flags);
 
-		fprintf(fp, "%s    cache ", _SL_);
-
-#define PRTFL(fl, flname) if (flags&RTCF_##fl) { \
-  flags &= ~RTCF_##fl; \
-  fprintf(fp, "%s" flname "%s", first ? "<" : "", flags ? "," : "> "); \
-  first = 0; }
-		PRTFL(LOCAL, "local");
-		PRTFL(REJECT, "reject");
-		PRTFL(MULTICAST, "mc");
-		PRTFL(BROADCAST, "brd");
-		PRTFL(DNAT, "dst-nat");
-		PRTFL(SNAT, "src-nat");
-		PRTFL(MASQ, "masq");
-		PRTFL(DIRECTDST, "dst-direct");
-		PRTFL(DIRECTSRC, "src-direct");
-		PRTFL(REDIRECTED, "redirected");
-		PRTFL(DOREDIRECT, "redirect");
-		PRTFL(FAST, "fastroute");
-		PRTFL(NOTIFY, "notify");
-		PRTFL(TPROXY, "proxy");
-
-		if (flags)
-			fprintf(fp, "%s%x> ", first ? "<" : "", flags);
 		if (tb[RTA_CACHEINFO]) {
 			struct rta_cacheinfo *ci = RTA_DATA(tb[RTA_CACHEINFO]);
 
-- 
2.15.1