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#include <net/if.h>
#include <netinet/in.h>
#include <linux/if_tunnel.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <unistd.h>
int netlinkd_delete_tunnel(const char *tnlname)
{
struct ip_tunnel_parm p;
strcpy(p.name, tnlname);
struct ifreq ifr;
strcpy(ifr.ifr_name, tnlname);
ifr.ifr_ifru.ifru_data = (char *) &p;
int fd;
if ((fd = socket(AF_INET6, SOCK_DGRAM, IPPROTO_IP)) < 0) {
return -1;
}
if (ioctl(fd, SIOCDELTUNNEL, &ifr)) {
return -1;
}
close(fd);
return 0;
}
int netlinkd_create_6in4(
const char *tnlname,
const char *ifmaster,
unsigned int saddr,
unsigned int daddr
)
{
struct ip_tunnel_parm p;
strcpy(p.name, tnlname);
p.iph.version = 4;
p.iph.ihl = 5;
p.iph.protocol = IPPROTO_IPV6;
p.iph.saddr = saddr;
p.iph.daddr = daddr;
p.link = if_nametoindex(ifmaster);
if (!p.link) {
return -1;
}
struct ifreq ifr;
strcpy(ifr.ifr_name, "sit0");
ifr.ifr_ifru.ifru_data = (char *) &p;
int fd;
if ((fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP)) < 0) {
return -1;
}
if (ioctl(fd, SIOCADDTUNNEL, &ifr)) {
return -1;
}
close(fd);
return 0;
}
int netlinkd_create_4in6(
const char *tnlname,
const char *ifmaster,
const unsigned char saddr[16],
const unsigned char daddr[16]
)
{
struct ip_tunnel_parm p;
strcpy(p.name, tnlname);
p.iph.version = 2;
p.iph.ihl = 0;
p.iph.protocol = IPPROTO_IP;
p.iph.saddr = saddr[0];
p.iph.daddr = daddr[0];
p.link = if_nametoindex(ifmaster);
if (!p.link) {
return -1;
}
struct ifreq ifr;
strcpy(ifr.ifr_name, "ip6tnl0");
ifr.ifr_ifru.ifru_data = (char *) &p;
int fd;
if ((fd = socket(AF_INET6, SOCK_DGRAM, IPPROTO_IP)) < 0) {
return -1;
}
if (ioctl(fd, SIOCADDTUNNEL, &ifr)) {
return -1;
}
close(fd);
return 0;
}
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