if (!(p->iph.frag_off&htons(IP_DF)))
printf(" nopmtudisc");
- if (!tnl_ioctl_get_6rd(p->name, &ip6rd) && ip6rd.prefixlen) {
+ if (p->iph.protocol == IPPROTO_IPV6 && !tnl_ioctl_get_6rd(p->name, &ip6rd) && ip6rd.prefixlen) {
printf(" 6rd-prefix %s/%u ",
inet_ntop(AF_INET6, &ip6rd.prefix, s1, sizeof(s1)),
ip6rd.prefixlen);
#include <stdio.h>
#include <string.h>
#include <unistd.h>
+#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
return err;
}
-static int tnl_gen_ioctl(int cmd, const char *name, void *p)
+static int tnl_gen_ioctl(int cmd, const char *name, void *p, int skiperr)
{
struct ifreq ifr;
int fd;
ifr.ifr_ifru.ifru_data = p;
fd = socket(preferred_family, SOCK_DGRAM, 0);
err = ioctl(fd, cmd, &ifr);
- if (err)
+ if (err && errno != skiperr)
perror("ioctl");
close(fd);
return err;
int tnl_prl_ioctl(int cmd, const char *name, void *p)
{
- return tnl_gen_ioctl(cmd, name, p);
+ return tnl_gen_ioctl(cmd, name, p, -1);
}
int tnl_6rd_ioctl(int cmd, const char *name, void *p)
{
- return tnl_gen_ioctl(cmd, name, p);
+ return tnl_gen_ioctl(cmd, name, p, -1);
}
int tnl_ioctl_get_6rd(const char *name, void *p)
{
- return tnl_gen_ioctl(SIOCGET6RD, name, p);
+ return tnl_gen_ioctl(SIOCGET6RD, name, p, EINVAL);
}