static int
match_interfaces(char *host)
{
struct in6_addr **lif = local_interfaces();
struct hostent *hp;
int rc = 0;
int errnum;
/* are there any local interfaces */
if (lif == NULL)
return (0);
/* cycle through the host db addresses */
hp = getipnodebyname(host, AF_INET6, AI_ALL|AI_V4MAPPED, &errnum);
if (hp != NULL) {
struct in6_addr **tmp = (struct in6_addr **)hp->h_addr_list;
int i;
for (i = 0; ((rc == 0) && (tmp[i] != NULL)); i++) {
int j;
for (j = 0; ((rc == 0) && (lif[j] != NULL)); j++)
if (memcmp(tmp[i], lif[j],
sizeof (struct in6_addr)) == 0)
rc = 1;
}
}
free(lif);
return (rc);
}
static boost::asio::ip::address local_address()
{
boost::system::error_code ec;
boost::asio::ip::address ret = boost::asio::ip::address_v4::any();
const std::vector<interface_t> &
interfaces = local_interfaces(ec)
;
std::vector<interface_t>::const_iterator
it = interfaces.begin()
;
for (; it != interfaces.end(); ++it)
{
const boost::asio::ip::address & a = (*it).destination;
/**
* Skip loopback, multicast and any.
*/
if (
address_is_loopback(a)|| address_is_multicast(a) ||
address_is_any(a)
)
{
continue;
}
// Other flags, IFF_UP, etc...
/**
* Prefer an ipv4 address over v6.
*/
if (a.is_v4())
{
ret = a;
break;
}
/**
* If this one is not any then return it.
*/
if (ret != boost::asio::ip::address_v4::any())
{
ret = a;
}
}
return ret;
}