#include <netinet/ether.h> #include <stdio.h> #define ETHER_LINE_LEN 256 /* This test requires /etc/ethers to exist * and to have host "teeth". For example: * 00:11:22:33:44:55 teeth */ int main(void) { struct ether_addr addr; char host[ETHER_LINE_LEN]; int i; int res = ether_hostton("teeth", &addr); if (res) return 1; for (i = 0; i < 6; i++) { printf("%02x", addr.ether_addr_octet[i]); if (i < 5) printf(":"); } res = ether_ntohost(host, &addr); if (res) return 1; printf(" %s\n", host); return 0; }