int cmpaddr(struct sockaddr_storage *ss1, socklen_t sslen1,
struct sockaddr_storage *ss2, socklen_t sslen2)
{
int ss1_offset = 0, ss2_offset = 0;
struct sockaddr_in6 *ss1_addr6 = (struct sockaddr_in6 *)ss1;
struct sockaddr_in6 *ss2_addr6 = (struct sockaddr_in6 *)ss2;
struct sockaddr_in *ss1_addr = (struct sockaddr_in *)ss1;
struct sockaddr_in *ss2_addr = (struct sockaddr_in *)ss2;
char *addr1, *addr2;
if (ss1->ss_family == ss2->ss_family)
return memcmp(ss1, ss2, sslen1);
if (ss1->ss_family == AF_INET6) {
if (is_v4_mapped(ss1, sslen1))
return 1;
addr1 = (char *)&ss1_addr6->sin6_addr;
ss1_offset = 12;
} else
addr1 = (char *)&ss1_addr->sin_addr;
if (ss2->ss_family == AF_INET6) {
if (is_v4_mapped(ss2, sslen2))
return 1;
addr2 = (char *)&ss2_addr6->sin6_addr;
ss2_offset = 12;
} else
addr2 = (char *)&ss2_addr->sin_addr;
return memcmp(addr1+ss1_offset, addr2+ss2_offset, 4);
}
static bool
isLoopback(const boost::asio::ip::address& addr)
{
if (addr.is_loopback()) {
return true;
}
// Workaround for loopback IPv4-mapped IPv6 addresses
// see https://svn.boost.org/trac/boost/ticket/9084
else if (addr.is_v6()) {
auto addr6 = addr.to_v6();
if (addr6.is_v4_mapped()) {
return addr6.to_v4().is_loopback();
}
}
return false;
}