congestvpn/VpnPeer.hpp

#pragma once

/** A peer of a bound (server) instance of UdpVpn */

#include <netinet/in.h>
#include "util.hpp"
#include "VpnPacket.hpp"

class UdpVpn;

class VpnPeer {
    public:
        class NetError : public MsgException {
            public:
                NetError(
                        const std::string& msg,
                        int code=0,
                        bool is_perror=false)
                    : MsgException(msg, code, is_perror) {}
        };

        VpnPeer(UdpVpn* vpn, const sockaddr_in6& ext_addr,
                const in6_addr& int_addr);

        const sockaddr_in6& get_ext_addr() const { return _ext_addr; }
        const in6_addr& get_int_addr() const { return _int_addr; }

        void set_int_addr(const in6_addr& int_addr);

        size_t write(const char* data, size_t len);
        size_t write(const VpnPacket& packet);

        uint32_t peek_next_seqno() const { return _next_seqno; }
        uint32_t next_seqno() { return _next_seqno++; }

    private:
        UdpVpn* _vpn;
        sockaddr_in6 _ext_addr;
        in6_addr _int_addr;
        uint32_t _next_seqno;
};