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/* simple test for index to interface name API */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <net/if.h>
#include <libnfnetlink/libnfnetlink.h>
int main(int argc, char *argv[])
{
int idx;
struct nlif_handle *h;
char name[IFNAMSIZ];
unsigned int flags;
if (argc != 2) {
fprintf(stderr, "Usage: %s <interface>\n", argv[0]);
exit(EXIT_FAILURE);
}
h = nlif_open();
if (h == NULL) {
perror("nlif_open");
exit(EXIT_FAILURE);
}
if (nlif_query(h) == -1) {
fprintf(stderr, "failed query to retrieve interfaces: %s\n",
strerror(errno));
exit(EXIT_FAILURE);
}
idx = if_nametoindex(argv[1]);
/* Superfluous: just to make sure nlif_index2name is working fine */
if (nlif_index2name(h, idx, name) == -1)
fprintf(stderr, "Cannot translate device idx=%u\n", idx);
if (nlif_get_ifflags(h, idx, &flags) == -1) {
fprintf(stderr, "Cannot get flags for device `%s'\n", argv[1]);
exit(EXIT_FAILURE);
}
printf("index (%d) is %s (%s) (%s)\n", idx, argv[1],
flags & IFF_RUNNING ? "RUNNING" : "NOT RUNNING",
flags & IFF_UP ? "UP" : "DOWN");
nlif_close(h);
return EXIT_SUCCESS;
}
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