prifinfo.c

unix下的route源程序

#include	"unpifi.h"

int
main(int argc, char **argv)
{
	struct ifi_info	*ifi, *ifihead;
	struct sockaddr	*sa;
	u_char			*ptr;
	int				i, family, doaliases;

	if (argc != 3)
		err_quit("usage: prifinfo <inet4|inet6> <doaliases>");
	if (strcmp(argv[1], "inet4") == 0)
		family = AF_INET;
#ifdef	AF_INET6
	else if (strcmp(argv[1], "inet6") == 0)
		family = AF_INET6;
#endif
	else
		err_quit("invalid <address-family>");
	doaliases = atoi(argv[2]);

	for (ifihead = ifi = Get_ifi_info(family, doaliases);
		 ifi != NULL; ifi = ifi->ifi_next) {
		printf("%s: <", ifi->ifi_name);
		if (ifi->ifi_flags & IFF_UP)			printf("UP ");
		if (ifi->ifi_flags & IFF_BROADCAST)		printf("BCAST ");
		if (ifi->ifi_flags & IFF_MULTICAST)		printf("MCAST ");
		if (ifi->ifi_flags & IFF_LOOPBACK)		printf("LOOP ");
		if (ifi->ifi_flags & IFF_POINTOPOINT)	printf("P2P ");
		printf(">\n");

		if ( (i = ifi->ifi_hlen) > 0) {
			ptr = ifi->ifi_haddr;
			do {
				printf("%s%x", (i == ifi->ifi_hlen) ? "  " : ":", *ptr++);
			} while (--i > 0);
			printf("\n");
		}

		if ( (sa = ifi->ifi_addr) != NULL)
			printf("  IP addr: %s\n", Sock_ntop(sa, sa->sa_len));
		if ( (sa = ifi->ifi_brdaddr) != NULL)
			printf("  broadcast addr: %s\n", Sock_ntop(sa, sa->sa_len));
		if ( (sa = ifi->ifi_dstaddr) != NULL)
			printf("  destination addr: %s\n", Sock_ntop(sa, sa->sa_len));
	}
	free_ifi_info(ifihead);
	exit(0);
}