void networkinterface_packetDropped(NetworkInterface* interface, Packet* packet) {
MAGIC_ASSERT(interface);
/*
* someone dropped a packet belonging to our interface
* hand it off to the correct socket layer
*/
gint key = packet_getSourceAssociationKey(packet);
Socket* socket = g_hash_table_lookup(interface->boundSockets, GINT_TO_POINTER(key));
/* just ignore if the socket closed in the meantime */
if(socket) {
socket_droppedPacket(socket, packet);
} else {
in_addr_t ip = packet_getSourceIP(packet);
gchar* ipString = address_ipToNewString(ip);
debug("interface dropping packet from %s:%u, no socket registered at %i",
ipString, packet_getSourcePort(packet), key);
g_free(ipString);
}
}
gssize udp_receiveUserData(UDP* udp, gpointer buffer, gsize nBytes, in_addr_t* ip, in_port_t* port) {
MAGIC_ASSERT(udp);
Packet* packet = socket_removeFromInputBuffer((Socket*)udp);
if(!packet) {
return -1;
}
/* copy lesser of requested and available amount to application buffer */
guint packetLength = packet_getPayloadLength(packet);
gsize copyLength = MIN(nBytes, packetLength);
guint bytesCopied = packet_copyPayload(packet, 0, buffer, copyLength);
utility_assert(bytesCopied == copyLength);
packet_addDeliveryStatus(packet, PDS_RCV_SOCKET_DELIVERED);
/* fill in address info */
if(ip) {
*ip = packet_getSourceIP(packet);
}
if(port) {
*port = packet_getSourcePort(packet);
}
/* destroy packet, throwing away any bytes not claimed by the app */
packet_unref(packet);
/* update the tracker output buffer stats */
Tracker* tracker = host_getTracker(worker_getCurrentHost());
Socket* socket = (Socket* )udp;
Descriptor* descriptor = (Descriptor *)socket;
gsize outLength = socket_getOutputBufferLength(socket);
gsize outSize = socket_getOutputBufferSize(socket);
tracker_updateSocketOutputBuffer(tracker, descriptor->handle, outLength, outSize);
debug("user read %u inbound UDP bytes", bytesCopied);
return (gssize)bytesCopied;
}