github.com/iDigitalFlame/xmt@v0.5.4/com/c_compat.go (about)

     1  //go:build !go1.18
     2  // +build !go1.18
     3  
     4  // Copyright (C) 2020 - 2023 iDigitalFlame
     5  //
     6  // This program is free software: you can redistribute it and/or modify
     7  // it under the terms of the GNU General Public License as published by
     8  // the Free Software Foundation, either version 3 of the License, or
     9  // any later version.
    10  //
    11  // This program is distributed in the hope that it will be useful,
    12  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    13  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    14  // GNU General Public License for more details.
    15  //
    16  // You should have received a copy of the GNU General Public License
    17  // along with this program.  If not, see <https://www.gnu.org/licenses/>.
    18  //
    19  
    20  package com
    21  
    22  import (
    23  	"net"
    24  
    25  	"github.com/iDigitalFlame/xmt/device"
    26  )
    27  
    28  type udpAddr struct {
    29  	p uint16
    30  	device.Address
    31  }
    32  type udpSockInternal interface{}
    33  
    34  func (u udpAddr) IsValid() bool {
    35  	return u.IsValid()
    36  }
    37  func (u udpAddr) String() string {
    38  	return u.Address.String()
    39  }
    40  func (u *udpCompat) ReadPacket(p []byte) (int, udpAddr, error) {
    41  	var (
    42  		o         udpAddr
    43  		n, a, err = u.udpSock.ReadFrom(p)
    44  	)
    45  	if a != nil {
    46  		switch t := a.(type) {
    47  		case *net.IPAddr:
    48  			o.Set(t.IP)
    49  		case *net.UDPAddr:
    50  			o.Set(t.IP)
    51  			o.p = uint16(t.Port)
    52  		}
    53  	}
    54  	return n, o, err
    55  }
    56  func (u *udpCompat) WritePacket(p []byte, a udpAddr) (int, error) {
    57  	var o net.Addr
    58  	if a.p > 0 {
    59  		o = &net.UDPAddr{IP: a.IP(), Port: int(a.p)}
    60  	} else {
    61  		o = &net.IPAddr{IP: a.IP()}
    62  	}
    63  	n, err := u.udpSock.WriteTo(p, o)
    64  	o = nil
    65  	return n, err
    66  }