#include <stdio.h> #include <string.h> #include <arpa/inet.h> #include <netinet/in.h> static int test (unsigned int inaddr, const char *expected) { struct in_addr addr; char *res; int fail; addr.s_addr = htonl (inaddr); res = inet_ntoa (addr); fail = strcmp (res, expected); printf ("%#010x -> \"%s\" -> %s%s\n", inaddr, res, fail ? "fail, expected" : "ok", fail ? expected : ""); return fail; } int main (void) { int result = 0; result |= test (INADDR_LOOPBACK, "127.0.0.1"); result |= test (INADDR_BROADCAST, "255.255.255.255"); result |= test (INADDR_ANY, "0.0.0.0"); result |= test (0xc0060746, "192.6.7.70"); return result; }