int
main(int argc, char *argv[])
{
char *ifname, *ptr;
int mtu;
ifconfig_handle_t *lifh;
if (argc != 3) {
errx(EINVAL, "Invalid number of arguments."
" First argument should be interface name, second argument"
" should be the MTU to set.");
}
/* We have a static number of arguments. Therefore we can do it simple. */
ifname = strdup(argv[1]);
mtu = (int)strtol(argv[2], &ptr, 10);
printf("Interface name: %s\n", ifname);
printf("New MTU: %d", mtu);
lifh = ifconfig_open();
if (lifh == NULL) {
errx("Failed to open libifconfig handle.");
return (-1);
}
if (ifconfig_set_mtu(lifh, ifname, mtu) == 0) {
printf("Successfully changed MTU of %s to %d\n", ifname, mtu);
ifconfig_close(lifh);
lifh = NULL;
free(ifname);
return (0);
}
switch (ifconfig_err_errtype(lifh)) {
case SOCKET:
warnx("couldn't create socket. This shouldn't happen.\n");
break;
case IOCTL:
if (ifconfig_err_ioctlreq(lifh) == SIOCSIFMTU) {
warnx("Failed to set MTU (SIOCSIFMTU)\n");
} else {
warnx(
"Failed to set MTU due to error in unexpected ioctl() call %lu. Error code: %i.\n",
ifconfig_err_ioctlreq(lifh),
ifconfig_err_errno(lifh));
}
break;
default:
warnx(
"Should basically never end up here in this example.\n");
break;
}
ifconfig_close(lifh);
lifh = NULL;
free(ifname);
return (-1);
}
int
main(int argc, char *argv[])
{
char *ifname, *ifactualname;
ifconfig_handle_t *lifh;
if (argc != 2) {
errx(EINVAL, "Invalid number of arguments."
" Only one argument is accepted, and it should be the name"
" of the interface to be created.");
}
/* We have a static number of arguments. Therefore we can do it simple. */
ifname = strdup(argv[1]);
printf("Requested interface name: %s\n", ifname);
lifh = ifconfig_open();
if (lifh == NULL) {
errx("Failed to open libifconfig handle.");
return (-1);
}
if (ifconfig_create_interface(lifh, ifname, &ifactualname) == 0) {
printf("Successfully created interface '%s'\n", ifactualname);
ifconfig_close(lifh);
lifh = NULL;
free(ifname);
free(ifactualname);
return (0);
}
switch (ifconfig_err_errtype(lifh)) {
case SOCKET:
warnx("couldn't create socket. This shouldn't happen.\n");
break;
case IOCTL:
if (ifconfig_err_ioctlreq(lifh) == SIOCIFCREATE2) {
warnx(
"Failed to create interface (SIOCIFCREATE2)\n");
}
break;
default:
warnx(
"This is a thorough example accommodating for temporary"
" 'not implemented yet' errors. That's likely what happened"
" now. If not, your guess is as good as mine. ;)"
" Error code: %d\n", ifconfig_err_errno(
lifh));
break;
}
ifconfig_close(lifh);
lifh = NULL;
free(ifname);
free(ifactualname);
return (-1);
}
int
main(int argc, char *argv[])
{
char *ifname;
if (argc != 2) {
errx(EINVAL, "Invalid number of arguments."
" Only one argument is accepted, and it should be the name"
" of the interface to be destroyed.");
}
/* We have a static number of arguments. Therefore we can do it simple. */
ifname = strdup(argv[1]);
printf("Interface name: %s\n", ifname);
ifconfig_handle_t *lifh = ifconfig_open();
if (ifconfig_destroy_interface(lifh, ifname) == 0) {
printf("Successfully destroyed interface '%s'.", ifname);
ifconfig_close(lifh);
lifh = NULL;
free(ifname);
return (0);
}
switch (ifconfig_err_errtype(lifh)) {
case SOCKET:
warnx("couldn't create socket. This shouldn't happen.\n");
break;
case IOCTL:
if (ifconfig_err_ioctlreq(lifh) == SIOCIFDESTROY) {
warnx(
"Failed to destroy interface (SIOCIFDESTROY)\n");
}
break;
default:
warnx(
"Should basically never end up here in this example.\n");
break;
}
ifconfig_close(lifh);
lifh = NULL;
free(ifname);
return (-1);
}