[3] | 1 | #!/usr/bin/env python
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| 2 |
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| 3 | import cmd
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| 4 | import struct
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| 5 | import socket
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| 6 | import os
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| 7 |
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| 8 | #------------------------------------------------------------------------------
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| 9 |
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| 10 | class CLI(cmd.Cmd):
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| 11 | """Simple command-line interface for the X-Plane Remote Access plugin."""
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| 12 | _types = { "i" : 0x01,
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| 13 | "f" : 0x02,
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| 14 | "d" : 0x03,
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| 15 | "fa" : 0x11,
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| 16 | "ia" : 0x12,
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| 17 | "ba" : 0x13 }
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| 18 |
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| 19 | @staticmethod
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| 20 | def _packLength(x):
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| 21 | """Pack the given integer as a variable-length value."""
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| 22 | s = ""
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| 23 | while True:
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| 24 | y = x&0x7f
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| 25 | x >>= 7
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| 26 | if x>0: y |= 0x80
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| 27 | s += struct.pack("B", y)
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| 28 | if x==0:
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| 29 | return s
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| 30 |
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| 31 | @staticmethod
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| 32 | def _packString(s):
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| 33 | """Pack the given string."""
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| 34 | return CLI._packLength(len(s)) + s
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| 35 |
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| 36 | def __init__(self, stream):
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| 37 | """Construct the CLI."""
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| 38 | cmd.Cmd.__init__(self)
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| 39 |
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| 40 | self._stream = stream
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| 41 |
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| 42 | self.use_rawinput = True
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| 43 | self.intro = "\nX-Plane Remote Access plugin command prompt\n"
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| 44 | self.prompt = "XPLRA>"
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| 45 |
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| 46 | self.daemon = True
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| 47 |
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| 48 | def default(self, line):
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| 49 | """Handle uhandled commands"""
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| 50 | if line=="EOF":
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| 51 | print
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| 52 | return self.do_quit("")
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| 53 | else:
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| 54 | return super(CLI, self).default(line)
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| 55 |
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| 56 | def do_get(self, args):
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| 57 | """Handle the 'get' command"""
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| 58 | words = args.split()
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| 59 | if len(words)<2:
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| 60 | print >> sys.stderr, "missing parameters"
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| 61 | return False
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| 62 |
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| 63 | name = words[0]
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| 64 |
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| 65 | type = words[1]
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| 66 | if type not in self._types:
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| 67 | print >> sys.stderr, "invalid type"
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| 68 | return False
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| 69 |
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| 70 | length = None
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| 71 | if len(words)>2:
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| 72 | length = int(words[2])
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| 73 |
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| 74 | self._writeU8(0x01)
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| 75 | self._writeString(name)
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| 76 | self._writeU8(self._types[type])
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| 77 | if length is not None:
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| 78 | self._writeS32(length)
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| 79 | self._flush()
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| 80 |
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| 81 | result = self._readU8()
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| 82 | print "result:", result
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| 83 | if result==0:
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| 84 | if type=="i":
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| 85 | value = self._readS32()
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| 86 | elif type=="f":
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| 87 | value = self._readFloat()
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| 88 | elif type=="d":
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| 89 | value = self._readDouble()
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| 90 | elif type=="fa":
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| 91 | length = self._readS32()
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| 92 | if length>0:
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| 93 | value = [self._readFloat() for i in range(0, length)]
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| 94 | else:
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| 95 | value = None
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| 96 | elif type=="ia":
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| 97 | length = self._readS32()
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| 98 | if length>0:
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| 99 | value = [self._readS32() for i in range(0, length)]
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| 100 | else:
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| 101 | value = None
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| 102 | elif type=="ba":
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| 103 | length = self._readS32()
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| 104 | if length>0:
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| 105 | bytes = [self._readU8() for i in range(0, length)]
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| 106 | value = ""
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| 107 | for b in bytes:
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| 108 | if b==0: break
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| 109 | value += chr(b)
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| 110 | else:
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| 111 | value = None
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| 112 |
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| 113 | print "value:", value, len(value)
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| 114 |
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| 115 | def _writeU8(self, x):
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| 116 | """Write the given value as an unsigned, 8-bit value."""
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| 117 | self._stream.write(struct.pack("B", x))
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| 118 |
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| 119 | def _writeS32(self, x):
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| 120 | """Write the given value as a signed, 32-bit value."""
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| 121 | self._stream.write(struct.pack("i", x))
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| 122 |
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| 123 | def _writeLength(self, length):
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| 124 | """Write the given value is a variable-length value into our stream."""
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| 125 | self._stream.write(self._packLength(length))
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| 126 |
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| 127 | def _writeString(self, str):
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| 128 | """Write the given string into the stream."""
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| 129 | self._stream.write(self._packString(str))
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| 130 |
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| 131 | def _flush(self):
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| 132 | """Flush our stream."""
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| 133 | self._stream.flush()
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| 134 |
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| 135 | def _readU8(self):
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| 136 | """Read an unsigned, 8-bit value from the stream."""
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| 137 | (value,) = struct.unpack("B", self._stream.read(1))
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| 138 | return value
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| 139 |
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| 140 | def _readS32(self):
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| 141 | """Read a signed, 32-bit value from the stream."""
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| 142 | (value,) = struct.unpack("i", self._stream.read(4))
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| 143 | return value
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| 144 |
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| 145 | def _readFloat(self):
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| 146 | """Read a single-precision floating point value from the stream."""
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| 147 | (value,) = struct.unpack("f", self._stream.read(4))
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| 148 | return value
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| 149 |
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| 150 | def _readDouble(self):
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| 151 | """Read a double-precision floating point value from the stream."""
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| 152 | (value,) = struct.unpack("d", self._stream.read(8))
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| 153 | return value
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| 154 |
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| 155 | def _readLength(self):
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| 156 | """Read a variable-length value from our stream."""
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| 157 | length = 0
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| 158 | while True:
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| 159 | (x,) = struct.unpack("B", self._stream.read(1))
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| 160 | length <<= 7
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| 161 | length |= x&0x7f
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| 162 | if x&0x80==0:
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| 163 | return length
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| 164 |
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| 165 | @staticmethod
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| 166 | def _readString(self):
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| 167 | """Read a string from our stream."""
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| 168 | length = self._readLength()
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| 169 | return self._stream.read(length)
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| 170 |
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| 171 | #------------------------------------------------------------------------------
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| 172 |
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| 173 | if __name__ == "__main__":
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| 174 | s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
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| 175 | s.connect("/tmp/xplra-" + os.environ["LOGNAME"])
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| 176 | CLI(s.makefile()).cmdloop()
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