static Iface_DEFUN incomingFromUpperDistributorIf(struct Message* msg,
struct Iface* upperDistributorIf)
{
struct TUNAdapter_pvt* ud =
Identity_containerOf(upperDistributorIf, struct TUNAdapter_pvt, pub.upperDistributorIf);
Assert_true(msg->length >= RouteHeader_SIZE + DataHeader_SIZE);
struct RouteHeader* hdr = (struct RouteHeader*) msg->bytes;
struct DataHeader* dh = (struct DataHeader*) &hdr[1];
enum ContentType type = DataHeader_getContentType(dh);
Assert_true(type <= ContentType_IP6_RAW);
// Shift ip address into destination slot.
Bits_memmoveConst(&hdr->ip6[DataHeader_SIZE - 16], hdr->ip6, 16);
// put my address as destination.
Bits_memcpyConst(&hdr->ip6[DataHeader_SIZE], ud->myIp6, 16);
Message_shift(msg, Headers_IP6Header_SIZE - DataHeader_SIZE - RouteHeader_SIZE, NULL);
struct Headers_IP6Header* ip6 = (struct Headers_IP6Header*) msg->bytes;
Bits_memset(ip6, 0, Headers_IP6Header_SIZE - 32);
Headers_setIpVersion(ip6);
ip6->payloadLength_be = Endian_bigEndianToHost16(msg->length - Headers_IP6Header_SIZE);
ip6->nextHeader = type;
ip6->hopLimit = 42;
TUNMessageType_push(msg, Ethernet_TYPE_IP6, NULL);
return sendToTunIf(msg, ud);
}
static Iface_DEFUN incomingFromSessionManagerIf(struct Message* msg, struct Iface* sessionManagerIf)
{
struct UpperDistributor_pvt* ud =
Identity_containerOf(sessionManagerIf, struct UpperDistributor_pvt, pub.sessionManagerIf);
Assert_true(msg->length >= RouteHeader_SIZE + DataHeader_SIZE);
struct RouteHeader* hdr = (struct RouteHeader*) msg->bytes;
struct DataHeader* dh = (struct DataHeader*) &hdr[1];
enum ContentType type = DataHeader_getContentType(dh);
if (type <= ContentType_IP6_RAW) {
return Iface_next(&ud->pub.tunAdapterIf, msg);
}
if (type == ContentType_CJDHT) {
Message_push32(msg, 0xffffffff, NULL);
Message_push32(msg, PFChan_Core_MSG, NULL);
return Iface_next(&ud->eventIf, msg);
}
if (type == ContentType_IPTUN) {
return Iface_next(&ud->pub.ipTunnelIf, msg);
}
Log_debug(ud->log, "DROP message with unknown type [%d]", type);
return NULL;
}
