int ifc_act_on_ipv6_route(int action, const char *ifname, struct in6_addr dst, int prefix_length,
struct in6_addr gw)
{
struct in6_rtmsg rtmsg;
int result;
int ifindex;
memset(&rtmsg, 0, sizeof(rtmsg));
ifindex = if_nametoindex(ifname);
if (ifindex == 0) {
printerr("if_nametoindex() failed: interface %s\n", ifname);
return -ENXIO;
}
rtmsg.rtmsg_ifindex = ifindex;
rtmsg.rtmsg_dst = dst;
rtmsg.rtmsg_dst_len = prefix_length;
rtmsg.rtmsg_flags = RTF_UP;
if (prefix_length == 128) {
rtmsg.rtmsg_flags |= RTF_HOST;
}
if (memcmp(&gw, &in6addr_any, sizeof(in6addr_any))) {
rtmsg.rtmsg_flags |= RTF_GATEWAY;
rtmsg.rtmsg_gateway = gw;
}
ifc_init6();
if (ifc_ctl_sock6 < 0) {
return -errno;
}
result = ioctl(ifc_ctl_sock6, action, &rtmsg);
if (result < 0) {
if (errno == EEXIST) {
result = 0;
} else {
result = -errno;
}
}
ifc_close6();
return result;
}
int ifc_reset_connections(const char *ifname, const int reset_mask)
{
#ifdef HAVE_ANDROID_OS
int result, success;
in_addr_t myaddr = 0;
struct ifreq ifr;
struct in6_ifreq ifr6;
if (reset_mask & RESET_IPV4_ADDRESSES) {
/* IPv4. Clear connections on the IP address. */
ifc_init();
if (!(reset_mask & RESET_IGNORE_INTERFACE_ADDRESS)) {
ifc_get_info(ifname, &myaddr, NULL, NULL);
}
ifc_init_ifr(ifname, &ifr);
init_sockaddr_in(&ifr.ifr_addr, myaddr);
result = ioctl(ifc_ctl_sock, SIOCKILLADDR, &ifr);
ifc_close();
} else {
result = 0;
}
if (reset_mask & RESET_IPV6_ADDRESSES) {
/*
* IPv6. On Linux, when an interface goes down it loses all its IPv6
* addresses, so we don't know which connections belonged to that interface
* So we clear all unused IPv6 connections on the device by specifying an
* empty IPv6 address.
*/
ifc_init6();
// This implicitly specifies an address of ::, i.e., kill all IPv6 sockets.
memset(&ifr6, 0, sizeof(ifr6));
success = ioctl(ifc_ctl_sock6, SIOCKILLADDR, &ifr6);
if (result == 0) {
result = success;
}
ifc_close6();
}
return result;
#else
return 0;
#endif
}
