| /* 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; |
| } |