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wireshark/epan/radius_dict.l
Luis Ontanon 906d2f3cbb http://www.wireshark.org/lists/wireshark-dev/200803/msg00308.html 
proto.[hc]
    define new APIs to allow delayed registration of protocol fields,
	so that dissectors with "flexible" fields  like xml, radius, diameter,
	snmp do not have to load their files at startup but can do so as late as possible.

gtk/dfilter_expr_dlg.c :
	have the expression dialog registering all prefixes so that all fileds appear in the dialog

tshark.c
	register all prefixes when called with -G

epan/radius_dict.l
epan/dissectors/packet-radius.c
epan/dissectors/packet-radius.h
	refactor registration to delay dictionary loading as long as possible



svn path=/trunk/; revision=24762
2008-04-03 22:13:52 +00:00

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/*
* We want to stop processing when we get to the end of the input.
*/
%option noyywrap
/*
* We don't use unput, so don't generate code for it.
*/
%option nounput
/*
* We don't read from the terminal.
*/
%option never-interactive
/*
* The language we're scanning is case-insensitive.
*/
%option caseless
/*
* Prefix scanner routines with "Radius" rather than "yy", so this scanner
* can coexist with other scanners.
*/
%option prefix="Radius"
%option outfile="radius_dict.c"
%{
/* radius_dict.l
*
* RADIUS dictionary parser
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <glib.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <epan/packet.h>
#include <epan/dissectors/packet-radius.h>
#include "radius_dict_lex.h"
#include <wiretap/file_util.h>
#define ECHO
#define MAX_INCLUDE_DEPTH 10
void add_vendor(const gchar* name, guint32 vendor_id);
void add_value(const gchar* attrib_name,const gchar* value_repr, long value);
void add_attribute(const gchar*,const gchar*, radius_attr_dissector_t,const gchar*, gboolean, gboolean);
static YY_BUFFER_STATE include_stack[10];
static int include_stack_ptr = 0;
static radius_dictionary_t* dict = NULL;
static GHashTable* value_strings = NULL; /* GArray(value_string) by attribute name */
static gchar* attr_name = NULL;
static gchar* attr_id = NULL;
static radius_attr_dissector_t* attr_type = NULL;
static gchar* attr_vendor = NULL;
static gchar* vendor_name = NULL;
static gchar* value_repr = NULL;
static gboolean encrypted = FALSE;
static gboolean has_tag = FALSE;
static gchar* current_vendor = NULL;
static GString* error = NULL;
static gchar* directory = NULL;
static int linenums[] = {1,1,1,1,1,1,1,1,1,1};
static gchar* fullpaths[] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL};
%}
%START WS_OUT VENDOR VENDOR_W_NAME ATTR ATTR_W_NAME ATTR_W_ID ATTR_W_TYPE ATTR_W_VENDOR VALUE VALUE_W_ATTR VALUE_W_NAME INCLUDE JUNK BEGIN_VENDOR END_VENDOR
%%
[:blank:] ;
#[^\n]* ;
<JUNK>.*\qn ;
<WS_OUT>VENDOR { BEGIN VENDOR; }
<WS_OUT>ATTRIBUTE { BEGIN ATTR; }
<WS_OUT>VALUE { BEGIN VALUE; }
<WS_OUT>\$INCLUDE { BEGIN INCLUDE; }
<WS_OUT>BEGIN-VENDOR { BEGIN BEGIN_VENDOR; }
<WS_OUT>END-VENDOR { BEGIN END_VENDOR; }
<BEGIN_VENDOR>[0-9a-z_-]+ {
if (current_vendor) {
g_free(current_vendor);
}
current_vendor = g_strdup(yytext);
BEGIN WS_OUT;
}
<END_VENDOR>[^\n]* {
if (current_vendor) {
g_free(current_vendor);
current_vendor = NULL;
}
BEGIN WS_OUT;
}
<VENDOR>[0-9a-z_-]+ { vendor_name = g_strdup(yytext); BEGIN VENDOR_W_NAME; }
<VENDOR_W_NAME>[0-9]+ {
add_vendor(vendor_name,strtol(yytext,NULL,10));
g_free(vendor_name);
BEGIN WS_OUT;
}
<VENDOR_W_NAME>0x[0-9a-f]+ {
add_vendor(vendor_name,strtol(yytext,NULL,16));
g_free(vendor_name);
BEGIN WS_OUT;
}
<ATTR>[0-9a-z_/-]+ { attr_name = g_strdup(yytext); encrypted = FALSE; has_tag = FALSE; BEGIN ATTR_W_NAME; }
<ATTR_W_NAME>[0-9]+ { attr_id = g_strdup(yytext); BEGIN ATTR_W_ID;}
<ATTR_W_NAME>0x[0-9a-f]+ { attr_id = g_strdup_printf("%u",(int)strtoul(yytext,NULL,16)); BEGIN ATTR_W_ID;}
<ATTR_W_ID>integer { attr_type = radius_integer; BEGIN ATTR_W_TYPE; }
<ATTR_W_ID>string { attr_type = radius_string; BEGIN ATTR_W_TYPE; }
<ATTR_W_ID>octets { attr_type = radius_octets; BEGIN ATTR_W_TYPE; }
<ATTR_W_ID>ipaddr { attr_type = radius_ipaddr; BEGIN ATTR_W_TYPE; }
<ATTR_W_ID>ipv6addr { attr_type = radius_ipv6addr; BEGIN ATTR_W_TYPE; }
<ATTR_W_ID>ipxnet { attr_type = radius_ipxnet; BEGIN ATTR_W_TYPE; }
<ATTR_W_ID>date { attr_type = radius_date; BEGIN ATTR_W_TYPE; }
<ATTR_W_ID>ifid { attr_type = radius_ifid; BEGIN ATTR_W_TYPE; }
<ATTR_W_ID>[0-9a-z_-]+ { attr_type = radius_octets; BEGIN ATTR_W_TYPE; }
<ATTR_W_TYPE>has_tag[,]? { has_tag = TRUE; }
<ATTR_W_TYPE>encrypt=1[,]? { encrypted=TRUE; }
<ATTR_W_TYPE>[0-9a-z_-]+=([^\n]*) ;
<ATTR_W_TYPE>[0-9a-z_-]+ {
attr_vendor = g_strdup(yytext);
add_attribute(attr_name,attr_id,attr_type,attr_vendor,encrypted,has_tag);
g_free(attr_id);
g_free(attr_vendor);
g_free(attr_name);
attr_id = NULL;
attr_vendor = NULL;
attr_name = NULL;
BEGIN WS_OUT;
}
<ATTR_W_TYPE>\n {
add_attribute(attr_name,attr_id,attr_type,current_vendor,encrypted,has_tag);
g_free(attr_id);
g_free(attr_name);
linenums[include_stack_ptr]++;
has_tag = FALSE;
encrypted=FALSE;
BEGIN WS_OUT;
}
<ATTR_W_VENDOR>\n {
add_attribute(attr_name,attr_id,attr_type,attr_vendor,encrypted,has_tag);
g_free(attr_id);
g_free(attr_vendor);
g_free(attr_name);
linenums[include_stack_ptr]++;
BEGIN WS_OUT;
};
<VALUE>[0-9a-z_/-]+ { attr_name = g_strdup(yytext); BEGIN VALUE_W_ATTR; }
<VALUE_W_ATTR>[^[:blank:]]+ { value_repr = g_strdup(yytext); BEGIN VALUE_W_NAME; }
<VALUE_W_NAME>[0-9]+ { add_value(attr_name,value_repr,strtol(yytext,NULL,10)); g_free(attr_name); g_free(value_repr); BEGIN WS_OUT;}
<VALUE_W_NAME>0x[0-9a-f]+ { add_value(attr_name,value_repr,strtol(yytext,NULL,16)); g_free(attr_name); g_free(value_repr); BEGIN WS_OUT;}
<INCLUDE>[^[:blank:]\n]+ {
if ( include_stack_ptr >= MAX_INCLUDE_DEPTH ) {
g_string_sprintfa(error, "$INCLUDE files nested to deeply\n");
yyterminate();
}
include_stack[include_stack_ptr++] = YY_CURRENT_BUFFER;
fullpaths[include_stack_ptr] = g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s",
directory,yytext);
yyin = eth_fopen( fullpaths[include_stack_ptr], "r" );
if (!yyin) {
if (errno) {
g_string_sprintfa(error, "Could not open file: '%s', error: %s\n", fullpaths[include_stack_ptr], strerror(errno) );
yyterminate();
}
} else {
linenums[include_stack_ptr] = 1;
yy_switch_to_buffer(yy_create_buffer( yyin, YY_BUF_SIZE ) );
}
BEGIN WS_OUT;
}
<<EOF>> {
fclose(yyin);
yyin = NULL;
if ( --include_stack_ptr < 0 ) {
yyterminate();
} else {
g_free(fullpaths[include_stack_ptr+1]);
fullpaths[include_stack_ptr+1] = NULL;
yy_delete_buffer( YY_CURRENT_BUFFER );
yy_switch_to_buffer(include_stack[include_stack_ptr]);
}
BEGIN WS_OUT;
}
\n { linenums[include_stack_ptr]++; BEGIN WS_OUT; }
%%
void add_vendor(const gchar* name, guint32 vendor_id) {
radius_vendor_info_t* v = g_malloc(sizeof(radius_vendor_info_t));
v->name = g_strdup(name);
v->code = vendor_id;
v->attrs_by_id = g_hash_table_new(g_direct_hash,g_direct_equal);
v->ett = -1;
g_hash_table_insert(dict->vendors_by_id,GUINT_TO_POINTER(v->code),v);
g_hash_table_insert(dict->vendors_by_name, (gpointer) v->name, v);
}
void add_attribute(const gchar* name, const gchar* code, radius_attr_dissector_t type, const gchar* vendor_name, gboolean crypt, gboolean tagged) {
radius_attr_info_t* a = g_malloc(sizeof(radius_attr_info_t));
GHashTable* by_id;
if (vendor_name) {
radius_vendor_info_t* v;
v = g_hash_table_lookup(dict->vendors_by_name,vendor_name);
if (! v) {
g_string_sprintfa(error, "Vendor: '%s', does not exist in %s:%i \n", vendor_name, fullpaths[include_stack_ptr], linenums[include_stack_ptr] );
BEGIN JUNK;
return;
} else {
by_id = v->attrs_by_id;
}
} else {
by_id = dict->attrs_by_id;
}
a->name = g_strdup(name);
a->code = strtol(code,NULL,10);
a->encrypt = crypt;
a->tagged = tagged;
a->type = type;
a->dissector = NULL;
a->vs = NULL;
a->hf = -1;
a->hf64 = -1;
a->hf_tag = -1;
a->hf_len = -1;
a->ett = -1;
g_hash_table_insert(by_id,GUINT_TO_POINTER(a->code),a);
g_hash_table_insert(dict->attrs_by_name,(gpointer) (a->name),a);
}
void add_value(const gchar* attrib_name, const gchar* value_repr, long value) {
value_string v;
GArray* a = g_hash_table_lookup(value_strings,attrib_name);
if (! a) {
a = g_array_new(TRUE,TRUE,sizeof(value_string));
g_hash_table_insert(value_strings,g_strdup(attrib_name),a);
}
v.value = value;
v.strptr = g_strdup(value_repr);
g_array_append_val(a,v);
}
static void setup_attrs(gpointer k _U_, gpointer v, gpointer p _U_) {
radius_attr_info_t* a = v;
gpointer key;
union {
GArray* a;
gpointer p;
} vs;
if (g_hash_table_lookup_extended(value_strings,a->name,&key,&vs.p) ) {
a->vs = (value_string*) vs.a->data;
g_array_free(vs.a,FALSE);
g_hash_table_remove(value_strings,key);
g_free(key);
}
}
static void setup_vendors(gpointer k _U_, gpointer v, gpointer p) {
radius_vendor_info_t* vnd = v;
g_hash_table_foreach(vnd->attrs_by_id,setup_attrs,p);
}
static gboolean destroy_value_strings(gpointer k, gpointer v, gpointer p _U_) {
value_string* vs = (value_string*)(((GArray*)v)->data);
g_free(k);
for (;vs->strptr;vs++) {
g_free((void*)vs->strptr);
}
g_array_free(v,TRUE);
return TRUE;
}
static gboolean destroy_attrs(gpointer k _U_, gpointer v, gpointer p _U_) {
radius_attr_info_t* a = v;
int i;
g_free((gpointer) (a->name));
if (a->vs) {
for(i=0; a->vs[i].strptr; i++) {
g_free((void *)a->vs[i].strptr);
}
g_free((void *)a->vs);
}
g_free(a);
return TRUE;
}
static gboolean destroy_vendors(gpointer k _U_, gpointer v, gpointer p) {
radius_vendor_info_t* vnd = v;
g_free( (gpointer) vnd->name);
g_hash_table_foreach_remove(vnd->attrs_by_id,destroy_attrs,p);
g_hash_table_destroy(vnd->attrs_by_id);
g_free(vnd);
return TRUE;
}
static void destroy_dict(radius_dictionary_t* d) {
g_hash_table_foreach_remove(d->attrs_by_id,destroy_attrs,NULL);
g_hash_table_foreach_remove(d->vendors_by_id,destroy_vendors,NULL);
g_hash_table_destroy(d->vendors_by_id);
g_hash_table_destroy(d->attrs_by_id);
g_hash_table_destroy(d->vendors_by_name);
g_hash_table_destroy(d->attrs_by_name);
g_free(d);
}
gboolean radius_load_dictionary (radius_dictionary_t* d, gchar* dir, const gchar* filename, gchar** err_str) {
int i;
dict = d;
directory = dir;
fullpaths[include_stack_ptr] = g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s",
directory,filename);
error = g_string_new("");
yyin = eth_fopen(fullpaths[include_stack_ptr],"r");
if (!yyin) {
g_string_sprintfa(error, "Could not open file: '%s', error: %s\n", fullpaths[include_stack_ptr], strerror(errno) );
g_free(fullpaths[include_stack_ptr]);
*err_str = error->str;
g_string_free(error,FALSE);
return FALSE;
}
value_strings = g_hash_table_new(g_str_hash,g_str_equal);
BEGIN WS_OUT;
yylex();
if (yyin != NULL) fclose(yyin);
yyin = NULL;
for (i=0; i < 10; i++) {
if (fullpaths[i]) g_free(fullpaths[i]);
}
g_hash_table_foreach(dict->attrs_by_id,setup_attrs,NULL);
g_hash_table_foreach(dict->vendors_by_id,setup_vendors,NULL);
g_hash_table_foreach_remove(value_strings,destroy_value_strings,NULL);
if (error->len > 0) {
*err_str = error->str;
g_string_free(error,FALSE);
destroy_dict(dict);
return FALSE;
} else {
*err_str = NULL;
g_string_free(error,TRUE);
return TRUE;
}
}
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