95 lines
2.3 KiB
C
95 lines
2.3 KiB
C
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#ifndef TUNSAFE_NETWORK_COMMON_H_
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#define TUNSAFE_NETWORK_COMMON_H_
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#include "netapi.h"
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class PacketProcessor;
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// A simple singlethreaded pool of packets used on windows where
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// FreePacket / AllocPacket are multithreded and thus slightly slower
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#if defined(OS_WIN)
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class SimplePacketPool {
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public:
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explicit SimplePacketPool() {
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freed_packets_ = NULL;
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freed_packets_count_ = 0;
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}
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~SimplePacketPool() {
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FreePacketList(freed_packets_);
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}
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Packet *AllocPacketFromPool() {
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if (Packet *p = freed_packets_) {
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freed_packets_ = Packet_NEXT(p);
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freed_packets_count_--;
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p->Reset();
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return p;
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}
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return AllocPacket();
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}
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void FreePacketToPool(Packet *p) {
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Packet_NEXT(p) = freed_packets_;
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freed_packets_ = p;
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freed_packets_count_++;
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}
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void FreeSomePackets() {
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if (freed_packets_count_ > 32)
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FreeSomePacketsInner();
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}
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void FreeSomePacketsInner();
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int freed_packets_count_;
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Packet *freed_packets_;
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};
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#else
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class SimplePacketPool {
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public:
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Packet *AllocPacketFromPool() {
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return AllocPacket();
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}
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void FreePacketToPool(Packet *packet) {
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return FreePacket(packet);
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}
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};
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#endif
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// Aids with prefixing and parsing incoming and outgoing
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// packets with the tcp protocol header.
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class TcpPacketHandler {
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public:
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explicit TcpPacketHandler(SimplePacketPool *packet_pool);
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~TcpPacketHandler();
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// Adds a tcp header to a data packet so it can be transmitted on the wire
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void AddHeaderToOutgoingPacket(Packet *p);
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// Add a new chunk of incoming data to the packet list
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void QueueIncomingPacket(Packet *p);
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// Attempt to extract the next packet, returns NULL when complete.
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Packet *GetNextWireguardPacket();
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bool error() const { return error_flag_; }
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private:
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// Internal function to read a packet
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Packet *ReadNextPacket(uint32 num);
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SimplePacketPool *packet_pool_;
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// Total # of bytes queued
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uint32 rqueue_bytes_;
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// Set if there's a fatal error
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bool error_flag_;
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// These hold the incoming packets before they're parsed
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Packet *rqueue_, **rqueue_end_;
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uint32 predicted_key_in_, predicted_key_out_;
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uint64 predicted_serial_in_, predicted_serial_out_;
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};
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#endif // TUNSAFE_NETWORK_COMMON_H_
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