renamed capwap directory to cw.

FossilOrigin-Name: 8a43dd9d05a4cb73210243ddd8df2a26f16c7ef2c4d4e36ab446de1f65d88223

src/cw/sock_set_dontfrag.c

@@ -0,0 +1,25 @@
+
+#include <netinet/in.h>
+#include <sys/types.h>          
+#include <sys/socket.h>
+
+
+
+int sock_set_dontfrag(int sock,int val)
+{
+#if defined IP_MTU_DISCOVER && defined IP_PMTUDISC_DONT
+	int mtu_type;
+	if (val)
+       		mtu_type = IP_PMTUDISC_DO;
+	else
+		mtu_type = IP_PMTUDISC_WANT;
+
+	return setsockopt(sock, SOL_IP, IP_MTU_DISCOVER, &mtu_type, sizeof (mtu_type));
+#elif defined IP_DONTFRAG
+
+	const int opt = val;
+	return setsockopt(sock, IPPROTO_IP, IP_DONTFRAG, &opt, sizeof (opt));
+
+#endif
+
+}