#include "unp.h" #include int main(int argc, char **argv) { int sockfd, len; char *ptr, buf[2048], addrstr[INET_ADDRSTRLEN]; struct ifconf ifc; struct ifreq *ifr; struct sockaddr_in *sinptr; sockfd = Socket(AF_INET, SOCK_DGRAM, 0); ifc.ifc_len = sizeof(buf); ifc.ifc_req = (struct ifreq *) buf; Ioctl(sockfd, SIOCGIFCONF, &ifc); for (ptr = buf; ptr < buf + ifc.ifc_len; ) { ifr = (struct ifreq *) ptr; len = sizeof(struct sockaddr); #ifdef HAVE_SOCKADDR_SA_LEN if (ifr->ifr_addr.sa_len > len) len = ifr->ifr_addr.sa_len; /* length > 16 */ #endif ptr += sizeof(ifr->ifr_name) + len; /* for next one in buffer */ switch (ifr->ifr_addr.sa_family) { case AF_INET: sinptr = (struct sockaddr_in *) &ifr->ifr_addr; printf("%s\t%s\n", ifr->ifr_name, Inet_ntop(AF_INET, &sinptr->sin_addr, addrstr, sizeof(addrstr))); break; default: printf("%s\n", ifr->ifr_name); break; } } exit(0); }