55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
#pragma once
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#include <string>
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#include <poll.h>
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#include "util.hpp"
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class TunDevice {
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public:
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class InitializationError : public MsgException {
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public:
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InitializationError(
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const std::string& msg,
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int code=0,
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bool is_perror=false)
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: MsgException(msg, code, is_perror) {}
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};
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class NetError : public MsgException {
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public:
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NetError(
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const std::string& msg,
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int code=0,
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bool is_perror=false)
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: MsgException(msg, code, is_perror) {}
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};
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TunDevice(const std::string& dev);
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~TunDevice();
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const std::string& get_dev_name() const { return _dev_name; }
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int get_fd() const { return _fd; }
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/** Get the interface's MTU */
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uint16_t get_mtu() const;
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/** Set the interface's MTU */
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bool set_mtu(uint16_t mtu);
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/* Reads a packet from the device.
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* Timeouts after `timeout` ms, or never if `timeout < 0`.
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* Upon timeout, returns 0.
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*/
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size_t poll_packet(char* read_buffer, size_t buf_size, int timeout=-1);
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/* Reads a packet, blocking if none is available. */
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size_t read(char* read_buffer, size_t buf_size);
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size_t write(const char* data, size_t len);
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private:
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int _fd;
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std::string _dev_name;
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struct pollfd _poll_fd;
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size_t _last_read_size;
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};
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