static int DomainEndsInDot(const char *dom)
{
while (dom[0] && dom[1])
{
if (dom[0] == '\\') // advance past escaped byte sequence
{
if (mDNSIsDigit(dom[1]) && mDNSIsDigit(dom[2]) && mDNSIsDigit(dom[3]))
dom += 4; // If "\ddd" then skip four
else dom += 2; // else if "\x" then skip two
}
else dom++; // else goto next character
}
return (dom[0] == '.');
}
mDNSlocal void handleLNTGetExternalAddressResponse(tcpLNTInfo *tcpInfo)
{
mDNS *m = tcpInfo->m;
mDNSu16 err = NATErr_None;
mDNSv4Addr ExtAddr;
mDNSu8 *ptr = (mDNSu8*)tcpInfo->Reply;
mDNSu8 *end = (mDNSu8*)tcpInfo->Reply + tcpInfo->nread;
mDNSu8 *addrend;
static char tagname[20] = "NewExternalIPAddress"; // Array NOT including a terminating nul
// LogInfo("handleLNTGetExternalAddressResponse: %s", ptr);
mDNSs16 http_result = ParseHTTPResponseCode(&ptr, end); // Note: modifies ptr
if (http_result == HTTPCode_404) LNT_ClearState(m);
if (http_result != HTTPCode_200)
{
mDNSASLLog((uuid_t *)&m->asl_uuid, "natt.legacy.AddressRequest", "noop", "HTTP Result", "HTTP code: %d", http_result);
return;
}
while (ptr < end && strncasecmp((char*)ptr, tagname, sizeof(tagname))) ptr++;
ptr += sizeof(tagname); // Skip over "NewExternalIPAddress"
while (ptr < end && *ptr != '>') ptr++;
ptr += 1; // Skip over ">"
// Find the end of the address and terminate the string so inet_pton() can convert it
addrend = ptr;
while (addrend < end && (mDNSIsDigit(*addrend) || *addrend == '.')) addrend++;
if (addrend >= end) return;
*addrend = 0;
if (inet_pton(AF_INET, (char*)ptr, &ExtAddr) <= 0)
{
mDNSASLLog((uuid_t *)&m->asl_uuid, "natt.legacy.AddressRequest", "noop", "inet_pton", "");
LogMsg("handleLNTGetExternalAddressResponse: Router returned bad address %s", ptr);
err = NATErr_NetFail;
ExtAddr = zerov4Addr;
}
if (!err) LogInfo("handleLNTGetExternalAddressResponse: External IP address is %.4a", &ExtAddr);
natTraversalHandleAddressReply(m, err, ExtAddr);
}
