/usr/share/pyshared/dpkt/rpc.py is in python-dpkt 1.6+svn54-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 | # $Id: rpc.py 23 2006-11-08 15:45:33Z dugsong $
"""Remote Procedure Call."""
import struct
import dpkt
# RPC.dir
CALL = 0
REPLY = 1
# RPC.Auth.flavor
AUTH_NONE = AUTH_NULL = 0
AUTH_UNIX = 1
AUTH_SHORT = 2
AUTH_DES = 3
# RPC.Reply.stat
MSG_ACCEPTED = 0
MSG_DENIED = 1
# RPC.Reply.Accept.stat
SUCCESS = 0
PROG_UNAVAIL = 1
PROG_MISMATCH = 2
PROC_UNAVAIL = 3
GARBAGE_ARGS = 4
SYSTEM_ERR = 5
# RPC.Reply.Reject.stat
RPC_MISMATCH = 0
AUTH_ERROR = 1
class RPC(dpkt.Packet):
__hdr__ = (
('xid', 'I', 0),
('dir', 'I', CALL)
)
class Auth(dpkt.Packet):
__hdr__ = (('flavor', 'I', AUTH_NONE), )
def unpack(self, buf):
dpkt.Packet.unpack(self, buf)
n = struct.unpack('>I', self.data[:4])[0]
self.data = self.data[4:4+n]
def __len__(self):
return 8 + len(self.data)
def __str__(self):
return self.pack_hdr() + struct.pack('>I', len(self.data)) + \
str(self.data)
class Call(dpkt.Packet):
__hdr__ = (
('rpcvers', 'I', 2),
('prog', 'I', 0),
('vers', 'I', 0),
('proc', 'I', 0)
)
def unpack(self, buf):
dpkt.Packet.unpack(self, buf)
self.cred = RPC.Auth(self.data)
self.verf = RPC.Auth(self.data[len(self.cred):])
self.data = self.data[len(self.cred) + len(self.verf):]
def __len__(self):
return len(str(self)) # XXX
def __str__(self):
return dpkt.Packet.__str__(self) + \
str(getattr(self, 'cred', RPC.Auth())) + \
str(getattr(self, 'verf', RPC.Auth())) + \
str(self.data)
class Reply(dpkt.Packet):
__hdr__ = (('stat', 'I', MSG_ACCEPTED), )
class Accept(dpkt.Packet):
__hdr__ = (('stat', 'I', SUCCESS), )
def unpack(self, buf):
self.verf = RPC.Auth(buf)
buf = buf[len(self.verf):]
self.stat = struct.unpack('>I', buf[:4])[0]
if self.stat == SUCCESS:
self.data = buf[4:]
elif self.stat == PROG_MISMATCH:
self.low, self.high = struct.unpack('>II', buf[4:12])
self.data = buf[12:]
def __len__(self):
if self.stat == PROG_MISMATCH: n = 8
else: n = 0
return len(self.verf) + 4 + n + len(self.data)
def __str__(self):
if self.stat == PROG_MISMATCH:
return str(self.verf) + struct.pack('>III', self.stat,
self.low, self.high) + self.data
return str(self.verf) + dpkt.Packet.__str__(self)
class Reject(dpkt.Packet):
__hdr__ = (('stat', 'I', AUTH_ERROR), )
def unpack(self, buf):
dpkt.Packet.unpack(self, buf)
if self.stat == RPC_MISMATCH:
self.low, self.high = struct.unpack('>II', self.data[:8])
self.data = self.data[8:]
elif self.stat == AUTH_ERROR:
self.why = struct.unpack('>I', self.data[:4])[0]
self.data = self.data[4:]
def __len__(self):
if self.stat == RPC_MISMATCH: n = 8
elif self.stat == AUTH_ERROR: n =4
else: n = 0
return 4 + n + len(self.data)
def __str__(self):
if self.stat == RPC_MISMATCH:
return struct.pack('>III', self.stat, self.low,
self.high) + self.data
elif self.stat == AUTH_ERROR:
return struct.pack('>II', self.stat, self.why) + self.data
return dpkt.Packet.__str__(self)
def unpack(self, buf):
dpkt.Packet.unpack(self, buf)
if self.stat == MSG_ACCEPTED:
self.data = self.accept = self.Accept(self.data)
elif self.status == MSG_DENIED:
self.data = self.reject = self.Reject(self.data)
def unpack(self, buf):
dpkt.Packet.unpack(self, buf)
if self.dir == CALL:
self.data = self.call = self.Call(self.data)
elif self.dir == REPLY:
self.data = self.reply = self.Reply(self.data)
def unpack_xdrlist(cls, buf):
l = []
while buf:
if buf.startswith('\x00\x00\x00\x01'):
p = cls(buf[4:])
l.append(p)
buf = p.data
elif buf.startswith('\x00\x00\x00\x00'):
break
else:
raise dpkt.UnpackError, 'invalid XDR list'
return l
def pack_xdrlist(*args):
return '\x00\x00\x00\x01'.join(map(str, args)) + '\x00\x00\x00\x00'
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