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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| //go:build !windows | ||
|
|
||
| package server | ||
|
|
||
| import ( | ||
| "errors" | ||
| "fmt" | ||
| "net/netip" | ||
|
|
||
| "golang.org/x/sys/unix" | ||
| ) | ||
|
|
||
| func newSocket() Socket { | ||
| fd, sockErr := unix.Socket(unix.SOCK_DGRAM, unix.AF_INET, 0) | ||
| if sockErr != nil { | ||
| panic(fmt.Errorf("error creating socket: %w", sockErr)) | ||
| } | ||
| return &socket{ | ||
| fd: fd, | ||
| } | ||
| } | ||
|
|
||
| type socket struct { | ||
| fd int | ||
| } | ||
|
|
||
| func (s *socket) Open(localAddr netip.AddrPort) error { | ||
| sAddr, addrErr := addrPortToSockaddr(localAddr) | ||
| if addrErr != nil { | ||
| return addrErr | ||
| } | ||
| if bindErr := unix.Bind(s.fd, sAddr); bindErr != nil { | ||
| return bindErr | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (s *socket) Close() error { | ||
| return unix.Close(s.fd) | ||
| } | ||
|
|
||
| func (s *socket) Send(remoteAddr netip.AddrPort, data []byte) error { | ||
| sAddr, addrErr := addrPortToSockaddr(remoteAddr) | ||
| if addrErr != nil { | ||
| return addrErr | ||
| } | ||
| return unix.Sendto(s.fd, data, 0, sAddr) | ||
| } | ||
|
|
||
| func (s *socket) Receive(data []byte) (int, netip.AddrPort, error) { | ||
| n, sAddr, recvErr := unix.Recvfrom(s.fd, data, 0) | ||
| if recvErr != nil { | ||
| return n, netip.AddrPort{}, recvErr | ||
| } | ||
| addr, addrErr := sockaddrToAddrPort(sAddr) | ||
| if addrErr != nil { | ||
| return n, netip.AddrPort{}, addrErr | ||
| } | ||
| return n, addr, nil | ||
| } | ||
|
|
||
| func addrPortToSockaddr(addr netip.AddrPort) (unix.Sockaddr, error) { | ||
| if addr.Addr().Is4() { | ||
| return &unix.SockaddrInet4{ | ||
| Addr: addr.Addr().As4(), | ||
| Port: int(addr.Port()), | ||
| }, nil | ||
| } | ||
| if addr.Addr().Is6() { | ||
| return &unix.SockaddrInet6{ | ||
| Addr: addr.Addr().As16(), | ||
| Port: int(addr.Port()), | ||
| }, nil | ||
| } | ||
| return nil, errors.New("invalid address") | ||
| } | ||
|
|
||
| func sockaddrToAddrPort(addr unix.Sockaddr) (netip.AddrPort, error) { | ||
| switch addr := addr.(type) { | ||
| case *unix.SockaddrInet4: | ||
| return netip.AddrPortFrom(netip.AddrFrom4(addr.Addr), uint16(addr.Port)), nil | ||
| case *unix.SockaddrInet6: | ||
| return netip.AddrPortFrom(netip.AddrFrom16(addr.Addr), uint16(addr.Port)), nil | ||
| default: | ||
| return netip.AddrPort{}, fmt.Errorf("unsupported sockaddr type: %T", addr) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| package server | ||
|
|
||
| import ( | ||
| "errors" | ||
| "fmt" | ||
| "net/netip" | ||
| "syscall" | ||
|
|
||
| "golang.org/x/sys/windows" | ||
| ) | ||
|
|
||
| type socket struct { | ||
| fd windows.Handle | ||
| } | ||
|
|
||
| func newSocket() Socket { | ||
| fd, _ := windows.Socket(windows.AF_INET, windows.SOCK_DGRAM, 0) | ||
| return &socket{fd: fd} | ||
| } | ||
|
|
||
| func (s *socket) Open(localAddr netip.AddrPort) error { | ||
| sAddr, addrErr := addrPortToSockaddr(localAddr) | ||
| if addrErr != nil { | ||
| return addrErr | ||
| } | ||
| return windows.Bind(s.fd, sAddr) | ||
| } | ||
|
|
||
| func (s *socket) Close() error { | ||
| return windows.Close(s.fd) | ||
| } | ||
|
|
||
| func (s *socket) Send(remoteAddr netip.AddrPort, data []byte) error { | ||
| sAddr, addrErr := addrPortToSockaddr(remoteAddr) | ||
| if addrErr != nil { | ||
| return addrErr | ||
| } | ||
| return windows.Sendto(s.fd, data, 0, sAddr) | ||
| } | ||
|
|
||
| func (s *socket) Receive(data []byte) (int, netip.AddrPort, error) { | ||
| n, sAddr, recvErr := windows.Recvfrom(s.fd, data, 0) | ||
| if recvErr != nil { | ||
| if ignoreReadFromError(recvErr) { | ||
| return 0, netip.AddrPort{}, nil | ||
| } | ||
| return n, netip.AddrPort{}, recvErr | ||
| } | ||
| addr, addrErr := sockaddrToAddrPort(sAddr) | ||
| if addrErr != nil { | ||
| return n, netip.AddrPort{}, addrErr | ||
| } | ||
| return n, addr, nil | ||
| } | ||
|
|
||
| // see https://github.com/bitmagnet-io/bitmagnet/pull/203 and https://github.com/anacrolix/dht/issues/16 | ||
| func ignoreReadFromError(err error) bool { | ||
| var errno syscall.Errno | ||
| if errors.As(err, &errno) { | ||
| switch errno { | ||
| case | ||
| windows.WSAENETRESET, | ||
| windows.WSAECONNRESET, | ||
| windows.WSAECONNABORTED, | ||
| windows.WSAECONNREFUSED, | ||
| windows.WSAENETUNREACH, | ||
| windows.WSAETIMEDOUT: | ||
| return true | ||
| } | ||
| } | ||
| return false | ||
| } | ||
|
|
||
| func addrPortToSockaddr(addr netip.AddrPort) (windows.Sockaddr, error) { | ||
| if addr.Addr().Is4() { | ||
| return &windows.SockaddrInet4{ | ||
| Addr: addr.Addr().As4(), | ||
| Port: int(addr.Port()), | ||
| }, nil | ||
| } | ||
| if addr.Addr().Is6() { | ||
| return &windows.SockaddrInet6{ | ||
| Addr: addr.Addr().As16(), | ||
| Port: int(addr.Port()), | ||
| }, nil | ||
| } | ||
| return nil, errors.New("invalid address") | ||
| } | ||
|
|
||
| func sockaddrToAddrPort(addr windows.Sockaddr) (netip.AddrPort, error) { | ||
| switch addr := addr.(type) { | ||
| case *windows.SockaddrInet4: | ||
| return netip.AddrPortFrom(netip.AddrFrom4(addr.Addr), uint16(addr.Port)), nil | ||
| case *windows.SockaddrInet6: | ||
| return netip.AddrPortFrom(netip.AddrFrom16(addr.Addr), uint16(addr.Port)), nil | ||
| default: | ||
| return netip.AddrPort{}, fmt.Errorf("unsupported sockaddr type: %T", addr) | ||
| } | ||
| } |