diff mbox series

[iproute2,v2,9/9] tunnel: Return constant string without copying it

Message ID 1516284276-10942-10-git-send-email-serhe.popovych@gmail.com
State Accepted, archived
Delegated to: stephen hemminger
Headers show
Series ip/tunnel: Improve tunnel parameters printing | expand

Commit Message

Serhey Popovych Jan. 18, 2018, 2:04 p.m. UTC 
We return constant string from tnl_strproto(), no need
to copy it to temporary buffer and then return such
buffer as const: return constant string instead.

Signed-off-by: Serhey Popovych <serhe.popovych@gmail.com>
---
 ip/tunnel.c |   25 +++++++------------------
 1 file changed, 7 insertions(+), 18 deletions(-)
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Patch

diff --git a/ip/tunnel.c b/ip/tunnel.c
index 42ae70e..0414804 100644
--- a/ip/tunnel.c
+++ b/ip/tunnel.c
@@ -40,33 +40,22 @@ 
 
 const char *tnl_strproto(__u8 proto)
 {
-	static char buf[16];
-
 	switch (proto) {
 	case IPPROTO_IPIP:
-		strcpy(buf, "ip");
-		break;
+		return "ip";
 	case IPPROTO_GRE:
-		strcpy(buf, "gre");
-		break;
+		return "gre";
 	case IPPROTO_IPV6:
-		strcpy(buf, "ipv6");
-		break;
+		return "ipv6";
 	case IPPROTO_ESP:
-		strcpy(buf, "esp");
-		break;
+		return "esp";
 	case IPPROTO_MPLS:
-		strcpy(buf, "mpls");
-		break;
+		return "mpls";
 	case 0:
-		strcpy(buf, "any");
-		break;
+		return "any";
 	default:
-		strcpy(buf, "unknown");
-		break;
+		return "unknown";
 	}
-
-	return buf;
 }
 
 int tnl_get_ioctl(const char *basedev, void *p)