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发表于 2004-5-14 00:23:05
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ethereal_gen.py文件内容: 分两楼给出：
################################################
# -*- python -*-
# $Id: ethereal_gen.py,v 1.29 2004/02/20 13:51:30 jmayer Exp $
# ethereal_gen.py (part of idl2eth)
#
# Author : Frank Singleton ([email protected])
#
# Copyright (C) 2001 Frank Singleton, Ericsson Inc.
#
# This file is a backend to "omniidl", used to generate "Ethereal"
# dissectors from CORBA IDL descriptions. The output language generated
# is "C". It will generate code to use the GIOP/IIOP get_CDR_XXX API.
#
# Please see packet-giop.h in Ethereal distro for API description.
# Ethereal is available at http://www.ethereal.com/
#
# Omniidl is part of the OmniOrb distribution, and is available at
# http://www.uk.research.att.com/omniORB/omniORB.html
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
#
# Description:
#
# Omniidl Back-end which parses an IDL list of "Operation" nodes
# passed from ethereal_be2.py and generates "C" code for compiling
# as a plugin for the Ethereal IP Protocol Analyser.
#
#
# Strategy (sneaky but ...)
#
# problem: I dont know what variables to declare until AFTER the helper functions
# have been built, so ...
#
# There are 2 passes through genHelpers, the first one is there just to
# make sure the fn_hash data struct is populated properly.
# The second pass is the real thing, generating code and declaring
# variables (from the 1st pass) properly.
#
"""Ethereal IDL compiler back-end."""
from omniidl import idlast, idltype, idlutil, output
import sys, string
import tempfile
#
# Output class, generates "C" src code for the sub-dissector
#
# in:
#
#
# self - me
# st - output stream
# node - a reference to an Operations object.
# name - scoped name (Module::Module::Interface:: .. ::Operation
#
#
# TODO -- FS
#
# 1. generate hf[] data for searchable fields (but what is searchable?)
# 2. add item instead of add_text()
# 3. sequence handling [done]
# 4. User Exceptions [done]
# 5. Fix arrays, and structs containing arrays [done]
# 6. Handle pragmas.
# 7. Exception can be common to many operations, so handle them outside the
# operation helper functions [done]
# 8. Automatic variable declaration [done, improve, still get some collisions.add variable delegator function ]
# For example, mutlidimensional arrays.
# 9. wchar and wstring handling [giop API needs improving]
# 10. Support Fixed [done]
# 11. Support attributes (get/set) [started, needs language mapping option, perhaps ethereal GUI option
# to set the attribute function prefix or suffix ? ] For now the prefix is "_get" and "_set"
# eg: attribute string apple => _get_apple and _set_apple
#
# 12. Implement IDL "union" code [done]
# 13. Implement support for plugins [done]
# 14. Dont generate code for empty operations (cf: exceptions without members)
# 15. Generate code to display Enums numerically and symbolically [done]
# 16. Place structs/unions in subtrees
# 17. Recursive struct and union handling [done ]
# 18. Improve variable naming for display (eg: structs, unions etc)
#
# Also test, Test, TEST
#
#
# Strategy:
# For every operation and attribute do
# For return val and all parameters do
# find basic IDL type for each parameter
# output get_CDR_xxx
# output exception handling code
# output attribute handling code
#
#
class ethereal_gen_C:
#
# Turn DEBUG stuff on/off
#
DEBUG = 0
#
# Some string constants for our templates
#
c_u_octet4 = "guint32 u_octet4;"
c_s_octet4 = "gint32 s_octet4;"
c_u_octet2 = "guint16 u_octet2;"
c_s_octet2 = "gint16 s_octet2;"
c_u_octet1 = "guint8 u_octet1;"
c_s_octet1 = "gint8 s_octet1;"
c_float = "gfloat my_float;"
c_double = "gdouble my_double;"
c_seq = "gchar *seq = NULL;" # pointer to buffer of gchars
c_i = "guint32 i_"; # loop index
c_i_lim = "guint32 u_octet4_loop_"; # loop limit
c_u_disc = "guint32 disc_u_"; # unsigned int union discriminant variable name (enum)
c_s_disc = "gint32 disc_s_"; # signed int union discriminant variable name (other cases, except Enum)
#
# Constructor
#
def __init__(self, st, protocol_name, dissector_name ,description):
self.st = output.Stream(tempfile.TemporaryFile(),4) # for first pass only
self.st_save = st # where 2nd pass should go
self.protoname = protocol_name # Protocol Name (eg: ECHO)
self.dissname = dissector_name # Dissector name (eg: echo)
self.description = description # Detailed Protocol description (eg: Echo IDL Example)
self.exlist = [] # list of exceptions used in operations.
#self.curr_sname # scoped name of current opnode or exnode I am visiting, used for generating "C" var declares
self.fn_hash = {} # top level hash to contain key = function/exception and val = list of variable declarations
# ie a hash of lists
self.fn_hash_built = 0 # flag to indicate the 1st pass is complete, and the fn_hash is correctly
# populated with operations/vars and exceptions/vars
#
# genCode()
#
# Main entry point, controls sequence of
# generated code.
#
#
def genCode(self,oplist, atlist, enlist, stlist, unlist): # operation,attribute,enums,struct and union lists
self.genHelpers(oplist,stlist,unlist) # sneaky .. call it now, to populate the fn_hash
# so when I come to that operation later, I have the variables to
# declare already.
self.genExceptionHelpers(oplist) # sneaky .. call it now, to populate the fn_hash
# so when I come to that exception later, I have the variables to
# declare already.
self.genAttributeHelpers(atlist) # sneaky .. call it now, to populate the fn_hash
# so when I come to that exception later, I have the variables to
# declare already.
self.fn_hash_built = 1 # DONE, so now I know , see genOperation()
self.st = self.st_save
self.genHeader() # initial dissector comments
self.genEthCopyright() # Ethereal Copyright comments.
self.genGPL() # GPL license
self.genIncludes()
self.genDeclares(oplist,atlist,enlist,stlist,unlist)
self.genProtocol()
self.genRegisteredFields()
self.genOpList(oplist) # string constant declares for operation names
self.genExList(oplist) # string constant declares for user exceptions
self.genAtList(atlist) # string constant declares for Attributes
self.genEnList(enlist) # string constant declares for Enums
self.genExceptionHelpers(oplist) # helper function to decode user exceptions that have members
self.genExceptionDelegator(oplist) # finds the helper function to decode a user exception
self.genAttributeHelpers(atlist) # helper function to decode "attributes"
self.genHelpers(oplist,stlist,unlist) # operation, struct and union decode helper functions
self.genMainEntryStart(oplist)
self.genOpDelegator(oplist)
self.genAtDelegator(atlist)
self.genMainEntryEnd()
self.gen_proto_register()
self.gen_proto_reg_handoff(oplist)
self.gen_plugin_init()
#self.dumpvars() # debug
#
# genHeader
#
# Generate Standard Ethereal Header Comments
#
#
def genHeader(self):
self.st.out(self.template_Header,dissector_name=self.dissname)
if self.DEBUG:
print "XXX genHeader"
#
# genEthCopyright
#
# Ethereal Copyright Info
#
#
def genEthCopyright(self):
if self.DEBUG:
print "XXX genEthCopyright"
self.st.out(self.template_ethereal_copyright)
#
# genGPL
#
# GPL licencse
#
#
def genGPL(self):
if self.DEBUG:
print "XXX genGPL"
self.st.out(self.template_GPL)
#
# genIncludes
#
# GPL licencse
#
#
def genIncludes(self):
if self.DEBUG:
print "XXX genIncludes"
self.st.out(self.template_Includes)
#
# denDeclares
#
# generate function prototypes if required
#
# Currently this is used for struct and union helper function declarations.
#
def genDeclares(self,oplist,atlist,enlist,stlist,unlist):
if self.DEBUG:
print "XXX genDeclares"
# struct prototypes
self.st.out(self.template_prototype_struct_start)
for st in stlist:
#print st.repoId()
sname = self.namespace(st, "_")
self.st.out(self.template_prototype_struct_body, stname=st.repoId(),name=sname)
self.st.out(self.template_prototype_struct_end)
# union prototypes
self.st.out(self.template_prototype_union_start)
for un in unlist:
sname = self.namespace(un, "_")
self.st.out(self.template_prototype_union_body, unname=un.repoId(),name=sname)
self.st.out(self.template_prototype_union_end)
#
# genProtocol
#
#
def genProtocol(self):
self.st.out(self.template_protocol, dissector_name=self.dissname)
self.st.out(self.template_init_boundary)
#
# genProtoAndRegisteredFields
#
#
def genRegisteredFields(self):
self.st.out(self.template_registered_fields )
#
# genMainEntryStart
#
def genMainEntryStart(self,oplist):
self.st.out(self.template_main_dissector_start, dissname=self.dissname, disprot=self.protoname)
self.st.inc_indent()
self.st.out(self.template_main_dissector_switch_msgtype_start)
self.st.out(self.template_main_dissector_switch_msgtype_start_request_reply)
self.st.inc_indent()
#
# genMainEntryEnd
#
def genMainEntryEnd(self):
self.st.out(self.template_main_dissector_switch_msgtype_end_request_reply)
self.st.dec_indent()
self.st.out(self.template_main_dissector_switch_msgtype_all_other_msgtype)
self.st.dec_indent()
self.st.out(self.template_main_dissector_end)
#
# genOpList
#
# in: oplist
#
# out: C code for IDL operations
#
# eg:
#
# static const char Penguin_Echo_echoShort_op[] = "echoShort" ;
#
def genOpList(self,oplist):
self.st.out(self.template_comment_operations_start)
for n in oplist:
sname = self.namespace(n, "_")
opname = n.identifier()
self.st.out(self.template_operations_declare, sname=sname, opname=opname)
self.st.out(self.template_comment_operations_end)
#
# genExList
#
# in: oplist
#
# out: C code for IDL User Exceptions that contain members
#
# eg:
#
# static const char user_exception_tux_bad_value[] = "IDL:tux/bad_value:1.0" ;
#
def genExList(self,oplist):
self.st.out(self.template_comment_user_exceptions_string_declare_start)
exlist = self.get_exceptionList(oplist) # grab list of ALL UNIQUE exception nodes
for ex in exlist:
if self.DEBUG:
print "XXX Exception " , ex.repoId()
print "XXX Exception Identifier" , ex.identifier()
print "XXX Exception Scoped Name" , ex.scopedName()
if (ex.members()): # only if has members
sname = self.namespace(ex, "_")
exname = ex.repoId()
self.st.out(self.template_user_exceptions_declare, sname=sname, exname=ex.repoId())
self.st.out(self.template_comment_user_exceptions_string_declare_end)
#
# genAtList
#
# in: atlist
#
# out: C code for IDL attribute decalarations.
#
# NOTE: Mapping of attributes to operation(function) names is tricky.
#
# The actual accessor function names are language-mapping specific. The attribute name
# is subject to OMG IDL's name scoping rules; the accessor function names are
# guaranteed not to collide with any legal operation names specifiable in OMG IDL.
#
# eg:
#
# static const char get_Penguin_Echo_get_width_at[] = "get_width" ;
# static const char set_Penguin_Echo_set_width_at[] = "set_width" ;
#
# or:
#
# static const char get_Penguin_Echo_get_width_at[] = "_get_width" ;
# static const char set_Penguin_Echo_set_width_at[] = "_set_width" ;
#
# TODO: Implement some language dependant templates to handle naming conventions
# language <=> attribute. for C, C++. Java etc
#
# OR, just add a runtime GUI option to select language binding for attributes -- FS
#
#
#
# ie: def genAtlist(self,atlist,language)
#
def genAtList(self,atlist):
self.st.out(self.template_comment_attributes_start)
for n in atlist:
for i in n.declarators(): #
sname = self.namespace(i, "_")
atname = i.identifier()
self.st.out(self.template_attributes_declare_Java_get, sname=sname, atname=atname)
if not n.readonly():
self.st.out(self.template_attributes_declare_Java_set, sname=sname, atname=atname)
self.st.out(self.template_comment_attributes_end)
#
# genEnList
#
# in: enlist
#
# out: C code for IDL Enum decalarations using "static const value_string" template
#
def genEnList(self,enlist):
self.st.out(self.template_comment_enums_start)
for enum in enlist:
sname = self.namespace(enum, "_")
self.st.out(self.template_comment_enum_comment, ename=enum.repoId())
self.st.out(self.template_value_string_start, valstringname=sname)
for enumerator in enum.enumerators():
self.st.out(self.template_value_string_entry, intval=str(self.valFromEnum(enum,enumerator)), description=enumerator.identifier())
#atname = n.identifier()
self.st.out(self.template_value_string_end, valstringname=sname)
self.st.out(self.template_comment_enums_end)
#
# genExceptionDelegator
#
# in: oplist
#
# out: C code for User exception delegator
#
# eg:
#
#
def genExceptionDelegator(self,oplist):
self.st.out(self.template_main_exception_delegator_start)
self.st.inc_indent()
exlist = self.get_exceptionList(oplist) # grab list of ALL UNIQUE exception nodes
for ex in exlist:
if self.DEBUG:
print "XXX Exception " , ex.repoId()
print "XXX Exception Identifier" , ex.identifier()
print "XXX Exception Scoped Name" , ex.scopedName()
if (ex.members()): # only if has members
sname = self.namespace(ex, "_")
exname = ex.repoId()
self.st.out(self.template_ex_delegate_code, sname=sname, exname=ex.repoId())
self.st.dec_indent()
self.st.out(self.template_main_exception_delegator_end)
#
# genAttribueHelpers()
#
# Generate private helper functions to decode Attributes.
#
# in: atlist
#
# For readonly attribute - generate get_xxx()
# If NOT readonly attribute - also generate set_xxx()
#
def genAttributeHelpers(self,atlist):
if self.DEBUG:
print "XXX genAttributeHelpers: atlist = ", atlist
self.st.out(self.template_attribute_helpers_start)
for attrib in atlist:
for decl in attrib.declarators():
self.genAtHelper(attrib,decl,"get") # get accessor
if not attrib.readonly():
self.genAtHelper(attrib,decl,"set") # set accessor
self.st.out(self.template_attribute_helpers_end)
#
# genAtHelper()
#
# Generate private helper functions to decode an attribute
#
# in: at - attribute node
# in: decl - declarator belonging to this attribute
# in: order - to generate a "get" or "set" helper
def genAtHelper(self,attrib,decl,order):
if self.DEBUG:
print "XXX genAtHelper"
sname = order + "_" + self.namespace(decl, "_") # must use set or get prefix to avoid collision
self.curr_sname = sname # update current opnode/exnode scoped name
if not self.fn_hash_built:
self.fn_hash[sname] = [] # init empty list as val for this sname key
# but only if the fn_hash is not already built
self.st.out(self.template_attribute_helper_function_start, sname=sname, atname=decl.repoId())
self.st.inc_indent()
self.st.out(self.template_helper_function_vars_start)
self.dumpCvars(sname)
self.st.out(self.template_helper_function_vars_end )
self.st.out(self.template_exception_helper_function_get_endianess)
#
# TODO - attributes are simple types, so remove array handling
#
if decl.sizes(): # an array
indices = self.get_indices_from_sizes(decl.sizes())
string_indices = '%i ' % indices # convert int to string
self.st.out(self.template_get_CDR_array_comment, aname=decl.identifier(), asize=string_indices)
self.st.out(self.template_get_CDR_array_start, aname=decl.identifier(), aval=string_indices)
self.addvar(self.c_i + decl.identifier() + ";")
self.st.inc_indent()
self.getCDR3(attrib.attrType(), decl.identifier() )
self.st.dec_indent()
self.st.out(self.template_get_CDR_array_end)
else:
self.getCDR3(attrib.attrType(), decl.identifier() )
self.st.dec_indent()
self.st.out(self.template_attribute_helper_function_end)
#
# genExceptionHelpers()
#
# Generate private helper functions to decode Exceptions used
# within operations
#
# in: oplist
#
def genExceptionHelpers(self,oplist):
exlist = self.get_exceptionList(oplist) # grab list of exception nodes
if self.DEBUG:
print "XXX genExceptionHelpers: exlist = ", exlist
self.st.out(self.template_exception_helpers_start)
for ex in exlist:
if (ex.members()): # only if has members
#print "XXX Exception = " + ex.identifier()
self.genExHelper(ex)
self.st.out(self.template_exception_helpers_end)
#
# genExhelper()
#
# Generate private helper functions to decode User Exceptions
#
# in: exnode ( an exception node)
#
def genExHelper(self,ex):
if self.DEBUG:
print "XXX genExHelper"
sname = self.namespace(ex, "_")
self.curr_sname = sname # update current opnode/exnode scoped name
if not self.fn_hash_built:
self.fn_hash[sname] = [] # init empty list as val for this sname key
# but only if the fn_hash is not already built
self.st.out(self.template_exception_helper_function_start, sname=sname, exname=ex.repoId())
self.st.inc_indent()
self.st.out(self.template_helper_function_vars_start)
self.dumpCvars(sname)
self.st.out(self.template_helper_function_vars_end )
self.st.out(self.template_exception_helper_function_get_endianess)
for m in ex.members():
#print "XXX genExhelper, member = ", m, "member type = ", m.memberType()
for decl in m.declarators():
#print "XXX genExhelper, d = ", decl
if decl.sizes(): # an array
indices = self.get_indices_from_sizes(decl.sizes())
string_indices = '%i ' % indices # convert int to string
self.st.out(self.template_get_CDR_array_comment, aname=decl.identifier(), asize=string_indices)
self.st.out(self.template_get_CDR_array_start, aname=decl.identifier(), aval=string_indices)
self.addvar(self.c_i + decl.identifier() + ";")
self.st.inc_indent()
self.getCDR3(m.memberType(), ex.identifier() + "_" + decl.identifier() )
self.st.dec_indent()
self.st.out(self.template_get_CDR_array_end)
else:
self.getCDR3(m.memberType(), ex.identifier() + "_" + decl.identifier() )
self.st.dec_indent()
self.st.out(self.template_exception_helper_function_end)
#
# genHelpers()
#
# Generate private helper functions for each IDL operation.
# Generate private helper functions for each IDL struct.
# Generate private helper functions for each IDL union.
#
#
# in: oplist, stlist, unlist
#
def genHelpers(self,oplist,stlist,unlist):
for op in oplist:
self.genOperation(op)
for st in stlist:
self.genStructHelper(st)
for un in unlist:
self.genUnionHelper(un)
#
# genOperation()
#
# Generate private helper functions for a specificIDL operation.
#
# in: opnode
#
def genOperation(self,opnode):
if self.DEBUG:
print "XXX genOperation called"
sname = self.namespace(opnode, "_")
if not self.fn_hash_built:
self.fn_hash[sname] = [] # init empty list as val for this sname key
# but only if the fn_hash is not already built
self.curr_sname = sname # update current opnode's scoped name
opname = opnode.identifier()
self.st.out(self.template_helper_function_comment, repoid=opnode.repoId() )
self.st.out(self.template_helper_function_start, sname=sname)
self.st.inc_indent()
self.st.out(self.template_helper_function_vars_start)
self.dumpCvars(sname)
self.st.out(self.template_helper_function_vars_end )
self.st.out(self.template_helper_switch_msgtype_start)
self.st.out(self.template_helper_switch_msgtype_request_start)
self.st.inc_indent()
self.genOperationRequest(opnode)
self.st.out(self.template_helper_switch_msgtype_request_end)
self.st.dec_indent()
self.st.out(self.template_helper_switch_msgtype_reply_start)
self.st.inc_indent()
self.st.out(self.template_helper_switch_rep_status_start)
self.st.out(self.template_helper_switch_msgtype_reply_no_exception_start)
self.st.inc_indent()
self.genOperationReply(opnode)
self.st.out(self.template_helper_switch_msgtype_reply_no_exception_end)
self.st.dec_indent()
self.st.out(self.template_helper_switch_msgtype_reply_user_exception_start)
self.st.inc_indent()
self.genOpExceptions(opnode)
self.st.out(self.template_helper_switch_msgtype_reply_user_exception_end)
self.st.dec_indent()
self.st.out(self.template_helper_switch_msgtype_reply_default_start)
self.st.out(self.template_helper_switch_msgtype_reply_default_end)
self.st.out(self.template_helper_switch_rep_status_end)
self.st.dec_indent()
self.st.out(self.template_helper_switch_msgtype_default_start)
self.st.out(self.template_helper_switch_msgtype_default_end)
self.st.out(self.template_helper_switch_msgtype_end)
self.st.dec_indent()
self.st.out(self.template_helper_function_end, sname=sname)
#
# Decode function parameters for a GIOP request message
#
#
def genOperationRequest(self,opnode):
for p in opnode.parameters():
if p.is_in():
if self.DEBUG:
print "XXX parameter = " ,p
print "XXX parameter type = " ,p.paramType()
print "XXX parameter type kind = " ,p.paramType().kind()
self.getCDR3(p.paramType(),p.identifier())
#
# Decode function parameters for a GIOP reply message
#
def genOperationReply(self,opnode):
rt = opnode.returnType() # get return type
if self.DEBUG:
print "XXX opnode = " , opnode
print "XXX return type = " , rt
print "XXX return type.unalias = " , rt.unalias()
print "XXX return type.kind() = " , rt.kind();
if (rt.kind() == idltype.tk_alias): # a typdef return val possibly ?
#self.getCDR3(rt.decl().alias().aliasType(),"dummy") # return value maybe a typedef
#self.get_CDR_alias(rt, "Operation_Return_Value" )
self.get_CDR_alias(rt, rt.name() )
else:
self.getCDR3(rt, "Operation_Return_Value") # return value is NOT an alias
for p in opnode.parameters():
if p.is_out(): # out or inout
self.getCDR3(p.paramType(),p.identifier())
#self.st.dec_indent()
def genOpExceptions(self,opnode):
for ex in opnode.raises():
if ex.members():
#print ex.members()
for m in ex.members():
t=0
#print m.memberType(), m.memberType().kind()
#
# Delegator for Operations
#
def genOpDelegator(self,oplist):
for op in oplist:
opname = op.identifier()
sname = self.namespace(op, "_")
self.st.out(self.template_op_delegate_code, sname=sname)
#
# Delegator for Attributes
#
def genAtDelegator(self,atlist):
for a in atlist:
for i in a.declarators():
atname = i.identifier()
sname = self.namespace(i, "_")
self.st.out(self.template_at_delegate_code_get, sname=sname)
if not a.readonly():
self.st.out(self.template_at_delegate_code_set, sname=sname)
#
# Add a variable declaration to the hash of list
#
def addvar(self, var):
if not ( var in self.fn_hash[self.curr_sname] ):
self.fn_hash[self.curr_sname].append(var)
#
# Print the variable declaration from the hash of list
#
def dumpvars(self):
for fn in self.fn_hash.keys():
print "FN = " + fn
for v in self.fn_hash[fn]:
print "-> " + v
#
# Print the "C" variable declaration from the hash of list
# for a given scoped operation name (eg: tux_penguin_eat)
#
def dumpCvars(self, sname):
for v in self.fn_hash[sname]:
self.st.out(v)
#
# Given an enum node, and a enumerator node, return
# the enumerator's numerical value.
#
# eg: enum Color {red,green,blue} should return
# val = 1 for green
#
def valFromEnum(self,enumNode, enumeratorNode):
if self.DEBUG:
print "XXX valFromEnum, enumNode = ", enumNode, " from ", enumNode.repoId()
print "XXX valFromEnum, enumeratorNode = ", enumeratorNode, " from ", enumeratorNode.repoId()
if isinstance(enumeratorNode,idlast.Enumerator):
value = enumNode.enumerators().index(enumeratorNode)
return value
## tk_null = 0
## tk_void = 1
## tk_short = 2
## tk_long = 3
## tk_ushort = 4
## tk_ulong = 5
## tk_float = 6
## tk_double = 7
## tk_boolean = 8
## tk_char = 9
## tk_octet = 10
## tk_any = 11
## tk_TypeCode = 12
## tk_Principal = 13
## tk_objref = 14
## tk_struct = 15
## tk_union = 16
## tk_enum = 17
## tk_string = 18
## tk_sequence = 19
## tk_array = 20
## tk_alias = 21
## tk_except = 22
## tk_longlong = 23
## tk_ulonglong = 24
## tk_longdouble = 25
## tk_wchar = 26
## tk_wstring = 27
## tk_fixed = 28
## tk_value = 29
## tk_value_box = 30
## tk_native = 31
## tk_abstract_interface = 32
#
# getCDR()
#
# This is the main "iterator" function. It takes a node, and tries to output
# a get_CDR_XXX accessor method(s). It can call itself multiple times
# if I find nested structures etc.
#
def getCDR3(self,type,name="fred"):
pt = type.unalias().kind() # param CDR type
pn = name # param name
if self.DEBUG:
print "XXX getCDR3: kind = " , pt
if pt == idltype.tk_ulong:
self.get_CDR_ulong(pn)
elif pt == idltype.tk_void:
self.get_CDR_void(pn)
elif pt == idltype.tk_short:
self.get_CDR_short(pn)
elif pt == idltype.tk_long:
self.get_CDR_long(pn)
elif pt == idltype.tk_ushort:
self.get_CDR_ushort(pn)
elif pt == idltype.tk_float:
self.get_CDR_float(pn)
elif pt == idltype.tk_double:
self.get_CDR_double(pn)
elif pt == idltype.tk_fixed:
self.get_CDR_fixed(type.unalias(),pn)
elif pt == idltype.tk_boolean:
self.get_CDR_boolean(pn)
elif pt == idltype.tk_char:
self.get_CDR_char(pn)
elif pt == idltype.tk_octet:
self.get_CDR_octet(pn)
elif pt == idltype.tk_any:
self.get_CDR_any(pn)
elif pt == idltype.tk_string:
self.get_CDR_string(pn)
elif pt == idltype.tk_wstring:
self.get_CDR_wstring(pn)
elif pt == idltype.tk_wchar:
self.get_CDR_wchar(pn)
elif pt == idltype.tk_enum:
#print type.decl()
self.get_CDR_enum(pn,type)
#self.get_CDR_enum(pn)
elif pt == idltype.tk_struct:
self.get_CDR_struct(type,pn)
elif pt == idltype.tk_TypeCode: # will I ever get here ?
self.get_CDR_TypeCode(pn)
elif pt == idltype.tk_sequence:
self.get_CDR_sequence(type,pn)
elif pt == idltype.tk_objref:
self.get_CDR_objref(type,pn)
elif pt == idltype.tk_array:
self.get_CDR_array(type,pn)
elif pt == idltype.tk_union:
self.get_CDR_union(type,pn)
elif pt == idltype.tk_alias:
if self.DEBUG:
print "XXXXX Alias type XXXXX " , type
self.get_CDR_alias(type,pn)
else:
self.genWARNING("Unknown typecode = " + '%i ' % pt) # put comment in source code
#
# get_CDR_XXX methods are here ..
#
#
def get_CDR_ulong(self,pn):
self.st.out(self.template_get_CDR_ulong, varname=pn)
self.addvar(self.c_u_octet4)
def get_CDR_short(self,pn):
self.st.out(self.template_get_CDR_short, varname=pn)
self.addvar(self.c_s_octet2)
def get_CDR_void(self,pn):
self.st.out(self.template_get_CDR_void, varname=pn)
def get_CDR_long(self,pn):
self.st.out(self.template_get_CDR_long, varname=pn)
self.addvar(self.c_s_octet4)
def get_CDR_ushort(self,pn):
self.st.out(self.template_get_CDR_ushort, varname=pn)
self.addvar(self.c_u_octet2)
def get_CDR_float(self,pn):
self.st.out(self.template_get_CDR_float, varname=pn)
self.addvar(self.c_float)
def get_CDR_double(self,pn):
self.st.out(self.template_get_CDR_double, varname=pn)
self.addvar(self.c_double)
def get_CDR_boolean(self,pn):
self.st.out(self.template_get_CDR_boolean, varname=pn)
self.addvar(self.c_u_octet1)
def get_CDR_fixed(self,type,pn):
if self.DEBUG:
print "XXXX calling get_CDR_fixed, type = ", type
print "XXXX calling get_CDR_fixed, type.digits() = ", type.digits()
print "XXXX calling get_CDR_fixed, type.scale() = ", type.scale()
string_digits = '%i ' % type.digits() # convert int to string
string_scale = '%i ' % type.scale() # convert int to string
string_length = '%i ' % self.dig_to_len(type.digits()) # how many octets to hilight for a number of digits
self.st.out(self.template_get_CDR_fixed, varname=pn, digits=string_digits, scale=string_scale, length=string_length )
self.addvar(self.c_seq)
def get_CDR_char(self,pn):
self.st.out(self.template_get_CDR_char, varname=pn)
self.addvar(self.c_u_octet1)
def get_CDR_octet(self,pn):
self.st.out(self.template_get_CDR_octet, varname=pn)
self.addvar(self.c_u_octet1)
def get_CDR_any(self,pn):
self.st.out(self.template_get_CDR_any, varname=pn)
def get_CDR_enum(self,pn,type):
#self.st.out(self.template_get_CDR_enum, varname=pn)
sname = self.namespace(type.unalias(), "_")
self.st.out(self.template_get_CDR_enum_symbolic, valstringarray=sname)
self.addvar(self.c_u_octet4)
def get_CDR_string(self,pn):
self.st.out(self.template_get_CDR_string, varname=pn)
self.addvar(self.c_u_octet4)
self.addvar(self.c_seq)
def get_CDR_wstring(self,pn):
self.st.out(self.template_get_CDR_wstring, varname=pn)
self.addvar(self.c_u_octet4)
self.addvar(self.c_seq)
def get_CDR_wchar(self,pn):
self.st.out(self.template_get_CDR_wchar, varname=pn)
self.addvar(self.c_s_octet1)
self.addvar(self.c_seq)
def get_CDR_TypeCode(self,pn):
self.st.out(self.template_get_CDR_TypeCode, varname=pn)
self.addvar(self.c_u_octet4)
def get_CDR_objref(self,type,pn):
self.st.out(self.template_get_CDR_object)
def get_CDR_sequence_len(self,pn):
self.st.out(self.template_get_CDR_sequence_length, seqname=pn)
self.addvar(self.c_u_octet4)
def get_CDR_union(self,type,pn):
if self.DEBUG:
print "XXX Union type =" , type, " pn = ",pn
print "XXX Union type.decl()" , type.decl()
print "XXX Union Scoped Name" , type.scopedName()
# If I am a typedef union {..}; node then find the union node
if isinstance(type.decl(), idlast.Declarator):
ntype = type.decl().alias().aliasType().decl()
else:
ntype = type.decl() # I am a union node
if self.DEBUG:
print "XXX Union ntype =" , ntype
sname = self.namespace(ntype, "_")
self.st.out(self.template_union_start, name=sname )
# Output a call to the union helper function so I can handle recursive union also.
self.st.out(self.template_decode_union,name=sname)
self.st.out(self.template_union_end, name=sname )
#
# Code to generate Union Helper functions
#
# in: un - a union node
#
#
def genUnionHelper(self,un):
if self.DEBUG:
print "XXX Union type =" , un
print "XXX Union type.decl()" , un.decl()
print "XXX Union Scoped Name" , un.scopedName()
sname = self.namespace(un, "_")
self.curr_sname = sname # update current opnode/exnode/stnode/unnode scoped name
if not self.fn_hash_built:
self.fn_hash[sname] = [] # init empty list as val for this sname key
# but only if the fn_hash is not already built
self.st.out(self.template_union_helper_function_start, sname=sname, unname=un.repoId())
self.st.inc_indent()
self.st.out(self.template_helper_function_vars_start)
self.dumpCvars(sname)
self.st.out(self.template_helper_function_vars_end )
self.st.out(self.template_union_helper_function_get_endianess)
st = un.switchType().unalias() # may be typedef switch type, so find real type
self.st.out(self.template_comment_union_code_start, uname=un.repoId() )
self.getCDR3(st,un.identifier());
# Depending on what kind of discriminant I come accross (enum,integer,char,
# short, boolean), make sure I cast the return value of the get_XXX accessor
# to an appropriate value. Omniidl idlast.CaseLabel.value() accessor will
# return an integer, or an Enumerator object that is then converted to its
# integer equivalent.
#
#
# NOTE - May be able to skip some of this stuff, but leave it in for now -- FS
#
if (st.kind() == idltype.tk_enum):
std = st.decl()
self.st.out(self.template_comment_union_code_discriminant, uname=std.repoId() )
self.st.out(self.template_union_code_save_discriminant_enum, discname=un.identifier() )
self.addvar(self.c_s_disc + un.identifier() + ";")
elif (st.kind() == idltype.tk_long):
self.st.out(self.template_union_code_save_discriminant_long, discname=un.identifier() )
self.addvar(self.c_s_disc + un.identifier() + ";")
elif (st.kind() == idltype.tk_ulong):
self.st.out(self.template_union_code_save_discriminant_ulong, discname=un.identifier() )
self.addvar(self.c_s_disc + un.identifier() + ";")
elif (st.kind() == idltype.tk_short):
self.st.out(self.template_union_code_save_discriminant_short, discname=un.identifier() )
self.addvar(self.c_s_disc + un.identifier() + ";")
elif (st.kind() == idltype.tk_ushort):
self.st.out(self.template_union_code_save_discriminant_ushort, discname=un.identifier() )
self.addvar(self.c_s_disc + un.identifier() + ";")
elif (st.kind() == idltype.tk_boolean):
self.st.out(self.template_union_code_save_discriminant_boolean, discname=un.identifier() )
self.addvar(self.c_s_disc + un.identifier() + ";")
elif (st.kind() == idltype.tk_char):
self.st.out(self.template_union_code_save_discriminant_char, discname=un.identifier() )
self.addvar(self.c_s_disc + un.identifier() + ";")
else:
print "XXX Unknown st.kind() = ", st.kind()
#
# Loop over all cases in this union
#
for uc in un.cases(): # for all UnionCase objects in this union
for cl in uc.labels(): # for all Caselabel objects in this UnionCase
# get integer value, even if discriminant is
# an Enumerator node
if isinstance(cl.value(),idlast.Enumerator):
if self.DEBUG:
print "XXX clv.identifier()", cl.value().identifier()
print "XXX clv.repoId()", cl.value().repoId()
print "XXX clv.scopedName()", cl.value().scopedName()
# find index of enumerator in enum declaration
# eg: RED is index 0 in enum Colors { RED, BLUE, GREEN }
clv = self.valFromEnum(std,cl.value())
else:
clv = cl.value()
#print "XXX clv = ",clv
#
# if char, dont convert to int, but put inside single quotes so that it is understood by C.
# eg: if (disc == 'b')..
#
# TODO : handle \xxx chars generically from a function or table lookup rather than
# a whole bunch of "if" statements. -- FS
if (st.kind() == idltype.tk_char):
if (clv == '\n'): # newline
string_clv = "'\\n'"
elif (clv == '\t'): # tab
string_clv = "'\\t'"
else:
string_clv = "'" + clv + "'"
else:
string_clv = '%i ' % clv
#
# If default case, then skp comparison with discriminator
#
if not cl.default():
self.st.out(self.template_comment_union_code_label_compare_start, discname=un.identifier(),labelval=string_clv )
self.st.inc_indent()
else:
self.st.out(self.template_comment_union_code_label_default_start )
self.getCDR3(uc.caseType(),uc.declarator().identifier())
if not cl.default():
self.st.dec_indent()
self.st.out(self.template_comment_union_code_label_compare_end )
else:
self.st.out(self.template_comment_union_code_label_default_end )
self.st.dec_indent()
self.st.out(self.template_union_helper_function_end)
#
# Currently, get_CDR_alias is geared to finding typdef
#
def get_CDR_alias(self,type,pn):
if self.DEBUG:
print "XXX get_CDR_alias, type = " ,type , " pn = " , pn
print "XXX get_CDR_alias, type.decl() = " ,type.decl()
print "XXX get_CDR_alias, type.decl().alias() = " ,type.decl().alias()
decl = type.decl() # get declarator object
if (decl.sizes()): # a typedef array
indices = self.get_indices_from_sizes(decl.sizes())
string_indices = '%i ' % indices # convert int to string
self.st.out(self.template_get_CDR_array_comment, aname=pn, asize=string_indices)
self.st.out(self.template_get_CDR_array_start, aname=pn, aval=string_indices)
self.addvar(self.c_i + pn + ";")
self.st.inc_indent()
self.getCDR3(type.decl().alias().aliasType(), pn )
self.st.dec_indent()
self.st.out(self.template_get_CDR_array_end)
else: # a simple typdef
if self.DEBUG:
print "XXX get_CDR_alias, type = " ,type , " pn = " , pn
print "XXX get_CDR_alias, type.decl() = " ,type.decl()
self.getCDR3(type, decl.identifier() )
#
# Handle structs, including recursive
#
def get_CDR_struct(self,type,pn):
# If I am a typedef struct {..}; node then find the struct node
if isinstance(type.decl(), idlast.Declarator):
ntype = type.decl().alias().aliasType().decl()
else:
ntype = type.decl() # I am a struct node
sname = self.namespace(ntype, "_")
self.st.out(self.template_structure_start, name=sname )
# Output a call to the struct helper function so I can handle recursive structs also.
self.st.out(self.template_decode_struct,name=sname)
self.st.out(self.template_structure_end, name=sname )
#
# genStructhelper()
#
# Generate private helper functions to decode a struct
#
# in: stnode ( a struct node)
#
def genStructHelper(self,st):
if self.DEBUG:
print "XXX genStructHelper"
sname = self.namespace(st, "_")
self.curr_sname = sname # update current opnode/exnode/stnode scoped name
if not self.fn_hash_built:
self.fn_hash[sname] = [] # init empty list as val for this sname key
# but only if the fn_hash is not already built
self.st.out(self.template_struct_helper_function_start, sname=sname, stname=st.repoId())
self.st.inc_indent()
self.st.out(self.template_helper_function_vars_start)
self.dumpCvars(sname)
self.st.out(self.template_helper_function_vars_end )
self.st.out(self.template_struct_helper_function_get_endianess)
for m in st.members():
for decl in m.declarators():
if decl.sizes(): # an array
indices = self.get_indices_from_sizes(decl.sizes())
string_indices = '%i ' % indices # convert int to string
self.st.out(self.template_get_CDR_array_comment, aname=decl.identifier(), asize=string_indices)
self.st.out(self.template_get_CDR_array_start, aname=decl.identifier(), aval=string_indices)
self.addvar(self.c_i + decl.identifier() + ";")
self.st.inc_indent()
self.getCDR3(m.memberType(), st.identifier() + "_" + decl.identifier() )
self.st.dec_indent()
self.st.out(self.template_get_CDR_array_end)
else:
self.getCDR3(m.memberType(), st.identifier() + "_" + decl.identifier() )
self.st.dec_indent()
self.st.out(self.template_struct_helper_function_end)
#
# Generate code to access a sequence of a type
#
def get_CDR_sequence(self,type, pn):
self.st.out(self.template_get_CDR_sequence_length, seqname=pn )
self.st.out(self.template_get_CDR_sequence_loop_start, seqname=pn )
self.addvar(self.c_i_lim + pn + ";" )
self.addvar(self.c_i + pn + ";")
self.st.inc_indent()
self.getCDR3(type.unalias().seqType(), pn ) # and start all over with the type
self.st.dec_indent()
self.st.out(self.template_get_CDR_sequence_loop_end)
#
# Generate code to access arrays,
#
# This is handled elsewhere. Arrays are either typedefs or in
# structs
#
# TODO - Remove this
#
def get_CDR_array(self,type, decl):
if self.DEBUG:
print "XXX get_CDR_array called "
print "XXX array size = " ,decl.sizes()
#
# namespace()
#
# in - op node
#
# out - scoped operation name, using sep character instead of "::"
#
# eg: Penguin::Echo::echoWString => Penguin_Echo_echoWString if sep = "_"
#
#
def namespace(self,node,sep):
sname = string.replace(idlutil.ccolonName(node.scopedName()), '::', sep)
#print "XXX namespace: sname = " + sname
return sname
#
# generate code for plugin initialisation
#
def gen_plugin_init(self):
self.st.out(self.template_plugin_init, description=self.description, protocol_name=self.protoname, dissector_name=self.dissname)
#
# generate register_giop_user_module code, and register only
# unique interfaces that contain operations. Also output
# a heuristic register in case we want to use that.
#
# TODO - make this a command line option
#
# -e explicit
# -h heuristic
#
def gen_proto_reg_handoff(self, oplist):
self.st.out(self.template_proto_reg_handoff_start, dissector_name=self.dissname)
self.st.inc_indent()
for iname in self.get_intlist(oplist):
self.st.out(self.template_proto_reg_handoff_body, dissector_name=self.dissname, protocol_name=self.protoname, interface=iname )
self.st.out(self.template_proto_reg_handoff_heuristic, dissector_name=self.dissname, protocol_name=self.protoname)
self.st.dec_indent()
self.st.out(self.template_proto_reg_handoff_end)
#
# generate proto_register_<protoname> code,
#
def gen_proto_register(self):
self.st.out(self.template_proto_register, description=self.description, protocol_name=self.protoname, dissector_name=self.dissname)
#
# in - oplist[]
#
# out - a list of unique interface names. This will be used in
# register_giop_user_module(dissect_giop_auto, "TEST IDL", "Penguin/Echo" ); so the operation
# name must be removed from the scope. And we also only want unique interfaces.
#
def get_intlist(self,oplist):
int_hash = {} # holds a hash of unique interfaces
for op in oplist:
sc = op.scopedName() # eg: penguin,tux,bite
sc1 = sc[:-1] # drop last entry
sn = idlutil.slashName(sc1) # penguin/tux
if not int_hash.has_key(sn):
int_hash[sn] = 0; # dummy val, but at least key is unique
return int_hash.keys()
#
# in - oplist[]
#
# out - a list of exception nodes (unique). This will be used in
# to generate dissect_exception_XXX functions.
#
def get_exceptionList(self,oplist):
ex_hash = {} # holds a hash of unique exceptions.
for op in oplist:
for ex in op.raises():
if not ex_hash.has_key(ex):
ex_hash[ex] = 0; # dummy val, but at least key is unique
if self.DEBUG:
print "XXX Exception = " + ex.identifier()
return ex_hash.keys()
#
# Simple function to take a list of array sizes and find the
# total number of elements
#
#
# eg: temp[4][3] = 12 elements
#
def get_indices_from_sizes(self,sizelist):
val = 1;
for i in sizelist:
val = val * i
return val
#
# Determine how many octets contain requested number
# of digits for an "fixed" IDL type "on the wire"
#
def dig_to_len(self,dignum):
return (dignum/2) + 1
#
# Output some TODO comment
#
def genTODO(self,message):
self.st.out(self.template_debug_TODO, message=message)
#
# Output some WARNING comment
#
def genWARNING(self,message):
self.st.out(self.template_debug_WARNING, message=message)
#
# Templates for C code
#
template_comment_operations_start = """\
/*
* IDL Operations Start
*/
"""
template_operations_declare = """static const char @sname@_op[] = \"@opname@\" ;"""
template_comment_operations_end = """
/*
* IDL Operations End
*/
"""
template_helper_function_comment = """\
/*
* @repoid@
*/
"""
template_helper_function_vars_start = """
/* Operation specific Variable declarations Begin */
"""
template_helper_function_vars_end = """
/* Operation specific Variable declarations End */
"""
template_helper_function_start = """\
static void decode_@sname@(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_, int *offset _U_, MessageHeader *header, gchar *operation _U_) {
gboolean stream_is_big_endian; /* big endianess */
"""
template_helper_function_end = """\
}
"""
#
# proto_reg_handoff() templates
#
template_proto_reg_handoff_start = """
/* register me as handler for these interfaces */
void proto_register_handoff_giop_@dissector_name@(void) {
"""
template_proto_reg_handoff_body = """
#if 0
/* Register for Explicit Dissection */
register_giop_user_module(dissect_@dissector_name@, \"@protocol_name@\", \"@interface@\", proto_@dissector_name@ ); /* explicit dissector */
#endif
"""
template_proto_reg_handoff_heuristic = """
/* Register for Heuristic Dissection */
register_giop_user(dissect_@dissector_name@, \"@protocol_name@\" ,proto_@dissector_name@); /* heuristic dissector */
"""
template_proto_reg_handoff_end = """
}
"""
#
# Initialize the protocol
#
template_protocol = """
/* Initialise the protocol and subtree pointers */
static int proto_@dissector_name@ = -1;
static gint ett_@dissector_name@ = -1;
"""
#
# Initialize the boundary Alignment
#
template_init_boundary = """
/* Initialise the initial Alignment */
static guint32 boundary = GIOP_HEADER_SIZE; /* initial value */
"""
#
# Initialize the Registered fields
#
template_registered_fields = """
/* Initialise the Registered fields */
/* TODO - Use registered fields */
"""
#
# plugin_init and plugin_reg_handoff templates
#
template_plugin_init = """
#ifndef __ETHEREAL_STATIC__
G_MODULE_EXPORT void
plugin_reg_handoff(void){
proto_register_handoff_giop_@dissector_name@();
}
G_MODULE_EXPORT void
plugin_init(plugin_address_table_t *pat
#ifndef PLUGINS_NEED_ADDRESS_TABLE
_U_
#endif
){
/* initialise the table of pointers needed in Win32 DLLs */
plugin_address_table_init(pat);
if (proto_@dissector_name@ == -1) {
proto_register_giop_@dissector_name@();
}
}
#endif
"""
#
# proto_register_<dissector name>(void) templates
#
template_proto_register = """
/* Register the protocol with Ethereal */
void proto_register_giop_@dissector_name@(void) {
/* setup list of header fields */
#if 0
static hf_register_info hf[] = {
/* no fields yet */
};
#endif
/* setup protocol subtree array */
static gint *ett[] = {
&ett_@dissector_name@,
};
/* Register the protocol name and description */
proto_@dissector_name@ = proto_register_protocol(\"@description@\" , \"@protocol_name@\", \"giop-@dissector_name@\" );
#if 0
proto_register_field_array(proto_@dissector_name@, hf, array_length(hf));
#endif
proto_register_subtree_array(ett,array_length(ett));
}
"""
#
# template for delegation code
#
template_op_delegate_code = """\
if (!strcmp(operation, @sname@_op )) {
decode_@sname@(tvb, pinfo, tree, offset, header, operation);
return TRUE;
}
"""
#
# Templates for the helper functions
#
#
#
template_helper_switch_msgtype_start = """\
stream_is_big_endian = is_big_endian(header);
switch(header->message_type) {
"""
template_helper_switch_msgtype_default_start = """\
default:
/* Unknown GIOP Exception */
g_warning("Unknown GIOP Message");
"""
template_helper_switch_msgtype_default_end = """\
break;
"""
template_helper_switch_msgtype_end = """\
} /* switch(header->message_type) */
"""
template_helper_switch_msgtype_request_start = """\
case Request:
"""
template_helper_switch_msgtype_request_end = """\
break;
"""
template_helper_switch_msgtype_reply_start = """\
case Reply:
"""
template_helper_switch_msgtype_reply_no_exception_start = """\
case NO_EXCEPTION:
"""
template_helper_switch_msgtype_reply_no_exception_end = """\
break;
"""
template_helper_switch_msgtype_reply_user_exception_start = """\
case USER_EXCEPTION:
"""
template_helper_switch_msgtype_reply_user_exception_end = """\
break;
"""
template_helper_switch_msgtype_reply_default_start = """\
default:
/* Unknown Exception */
g_warning("Unknown Exception ");
"""
template_helper_switch_msgtype_reply_default_end = """\
break;
"""
template_helper_switch_msgtype_reply_end = """\
break;
"""
template_helper_switch_msgtype_default_start = """\
default:
/* Unknown GIOP Message */
g_warning("Unknown GIOP Message");
"""
template_helper_switch_msgtype_default_end = """\
break;
"""
template_helper_switch_rep_status_start = """\
switch(header->rep_status) {
"""
template_helper_switch_rep_status_default_start = """\
default:
/* Unknown Reply Status */
g_warning("Unknown Reply Status");
"""
template_helper_switch_rep_status_default_end = """\
break;
"""
template_helper_switch_rep_status_end = """\
} /* switch(header->message_type) */
break;
""" |
|
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狗仔卡
发表于 2004-5-14 00:17:06
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