updated api tests

tests/api_test/udpserver6.c

@@ -0,0 +1,46 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <stdlib.h>
+
+#define MAXBUF 65536
+
+int main()
+{
+   int sock;
+   int status;
+   struct sockaddr_in6 sin6;
+   int sin6len;
+   char buffer[MAXBUF];
+
+   sock = socket(PF_INET6, SOCK_DGRAM,0);
+
+   sin6len = sizeof(struct sockaddr_in6);
+
+   memset(&sin6, 0, sin6len);
+
+   /* just use the first address returned in the structure */
+
+   sin6.sin6_port = htons(0);
+   sin6.sin6_family = AF_INET6;
+   sin6.sin6_addr = in6addr_any;
+
+   status = bind(sock, (struct sockaddr *)&sin6, sin6len);
+   if(-1 == status)
+     perror("bind"), exit(1);
+
+   status = getsockname(sock, (struct sockaddr *)&sin6, &sin6len);
+
+   printf("%d\n", ntohs(sin6.sin6_port));
+
+   status = recvfrom(sock, buffer, MAXBUF, 0, 
+                     (struct sockaddr *)&sin6, &sin6len);
+   printf("buffer : %s\n", buffer);
+
+   shutdown(sock, 2);
+   close(sock);
+   return 0;
+}