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Marcos Paulo de Souza
d747083a3c
This tests is much more like an example of how to do it, and also works as a test to check if rtnl_link_change is working as expected when it comes to loopback interface. Signed-off-by: Marcos Paulo de Souza <marcos.souza.org@gmail.com> https://github.com/thom311/libnl/pull/161
55 lines
1.1 KiB
C
55 lines
1.1 KiB
C
#include <net/if.h>
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#include <netlink/route/link.h>
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int main(void)
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{
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struct nl_sock *sk;
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struct rtnl_link *link, *change;
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struct nl_cache *cache;
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int err = 0;
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sk = nl_socket_alloc();
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if ((err = nl_connect(sk, NETLINK_ROUTE)) < 0) {
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nl_perror(err, "Unable to connect socket");
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return err;
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}
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if ((err = rtnl_link_alloc_cache(sk, AF_UNSPEC, &cache)) < 0) {
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nl_perror(err, "Unable to allocate cache");
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goto out;
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}
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if (!(link = rtnl_link_get_by_name(cache, "lo"))) {
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fprintf(stderr, "Interface not found\n");
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err = 1;
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goto out;
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}
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/* exit if the loopback interface is already deactivated */
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err = rtnl_link_get_flags(link);
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if (!(err & IFF_UP)) {
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err = 0;
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goto out;
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}
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change = rtnl_link_alloc();
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rtnl_link_unset_flags(change, IFF_UP);
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if ((err = rtnl_link_change(sk, link, change, 0)) < 0) {
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nl_perror(err, "Unable to deactivate lo");
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goto out;
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}
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rtnl_link_set_flags(change, IFF_UP);
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if ((err = rtnl_link_change(sk, link, change, 0)) < 0) {
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nl_perror(err, "Unable to activate lo");
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goto out;
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}
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err = 0;
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out:
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nl_socket_free(sk);
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return err;
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}
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