![Anders Broman](/assets/img/avatar_default.png)
packet-radius.c - avp specific dissectors broken https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=2974 svn path=/trunk/; revision=27126
456 lines
12 KiB
Text
456 lines
12 KiB
Text
/*
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* We don't use unput, so don't generate code for it.
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*/
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%option nounput
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/*
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* We don't read from the terminal.
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*/
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%option never-interactive
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/*
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* The language we're scanning is case-insensitive.
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*/
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%option caseless
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/*
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* Prefix scanner routines with "Radius" rather than "yy", so this scanner
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* can coexist with other scanners.
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*/
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%option prefix="Radius"
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%option outfile="radius_dict.c"
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%{
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/* radius_dict.l
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*
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* RADIUS dictionary parser
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <glib.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <epan/packet.h>
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#include <epan/dissectors/packet-radius.h>
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#include "radius_dict_lex.h"
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#include <wsutil/file_util.h>
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#ifdef _WIN32
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/* disable Windows VC compiler warning "signed/unsigned mismatch" associated */
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/* with YY_INPUT code generated by flex versions such as 2.5.35. */
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#pragma warning (disable:4018)
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#endif
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#define ECHO
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#define MAX_INCLUDE_DEPTH 10
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void add_vendor(const gchar* name, guint32 vendor_id);
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void add_value(const gchar* attrib_name,const gchar* value_repr, long value);
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void add_attribute(const gchar*,const gchar*, radius_attr_dissector_t,const gchar*, gboolean, gboolean);
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static YY_BUFFER_STATE include_stack[10];
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static int include_stack_ptr = 0;
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static radius_dictionary_t* dict = NULL;
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static GHashTable* value_strings = NULL; /* GArray(value_string) by attribute name */
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static gchar* attr_name = NULL;
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static gchar* attr_id = NULL;
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static radius_attr_dissector_t* attr_type = NULL;
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static gchar* attr_vendor = NULL;
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static gchar* vendor_name = NULL;
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static gchar* value_repr = NULL;
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static gboolean encrypted = FALSE;
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static gboolean has_tag = FALSE;
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static gchar* current_vendor = NULL;
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static GString* error = NULL;
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static gchar* directory = NULL;
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static int linenums[] = {1,1,1,1,1,1,1,1,1,1};
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static gchar* fullpaths[] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL};
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%}
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%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
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%%
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[:blank:] ;
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#[^\n]* ;
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<JUNK>.*\qn ;
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<WS_OUT>VENDOR { BEGIN VENDOR; }
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<WS_OUT>ATTRIBUTE { BEGIN ATTR; }
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<WS_OUT>VALUE { BEGIN VALUE; }
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<WS_OUT>\$INCLUDE { BEGIN INCLUDE; }
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<WS_OUT>BEGIN-VENDOR { BEGIN BEGIN_VENDOR; }
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<WS_OUT>END-VENDOR { BEGIN END_VENDOR; }
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<BEGIN_VENDOR>[0-9a-z_-]+ {
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if (current_vendor) {
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g_free(current_vendor);
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}
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current_vendor = g_strdup(yytext);
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BEGIN WS_OUT;
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}
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<END_VENDOR>[^\n]* {
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if (current_vendor) {
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g_free(current_vendor);
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current_vendor = NULL;
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}
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BEGIN WS_OUT;
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}
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<VENDOR>[0-9a-z_-]+ { vendor_name = g_strdup(yytext); BEGIN VENDOR_W_NAME; }
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<VENDOR_W_NAME>[0-9]+ {
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add_vendor(vendor_name,strtol(yytext,NULL,10));
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g_free(vendor_name);
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BEGIN WS_OUT;
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}
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<VENDOR_W_NAME>0x[0-9a-f]+ {
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add_vendor(vendor_name,strtol(yytext,NULL,16));
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g_free(vendor_name);
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BEGIN WS_OUT;
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}
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<ATTR>[0-9a-z_/-]+ { attr_name = g_strdup(yytext); encrypted = FALSE; has_tag = FALSE; BEGIN ATTR_W_NAME; }
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<ATTR_W_NAME>[0-9]+ { attr_id = g_strdup(yytext); BEGIN ATTR_W_ID;}
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<ATTR_W_NAME>0x[0-9a-f]+ { attr_id = g_strdup_printf("%u",(int)strtoul(yytext,NULL,16)); BEGIN ATTR_W_ID;}
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<ATTR_W_ID>integer { attr_type = radius_integer; BEGIN ATTR_W_TYPE; }
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<ATTR_W_ID>string { attr_type = radius_string; BEGIN ATTR_W_TYPE; }
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<ATTR_W_ID>octets { attr_type = radius_octets; BEGIN ATTR_W_TYPE; }
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<ATTR_W_ID>ipaddr { attr_type = radius_ipaddr; BEGIN ATTR_W_TYPE; }
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<ATTR_W_ID>ipv6addr { attr_type = radius_ipv6addr; BEGIN ATTR_W_TYPE; }
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<ATTR_W_ID>ipxnet { attr_type = radius_ipxnet; BEGIN ATTR_W_TYPE; }
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<ATTR_W_ID>date { attr_type = radius_date; BEGIN ATTR_W_TYPE; }
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<ATTR_W_ID>ifid { attr_type = radius_ifid; BEGIN ATTR_W_TYPE; }
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<ATTR_W_ID>[0-9a-z_-]+ { attr_type = radius_octets; BEGIN ATTR_W_TYPE; }
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<ATTR_W_TYPE>has_tag[,]? { has_tag = TRUE; }
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<ATTR_W_TYPE>encrypt=1[,]? { encrypted=TRUE; }
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<ATTR_W_TYPE>[0-9a-z_-]+=([^\n]*) ;
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<ATTR_W_TYPE>[0-9a-z_-]+ {
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attr_vendor = g_strdup(yytext);
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add_attribute(attr_name,attr_id,attr_type,attr_vendor,encrypted,has_tag);
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g_free(attr_id);
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g_free(attr_vendor);
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g_free(attr_name);
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attr_id = NULL;
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attr_vendor = NULL;
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attr_name = NULL;
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BEGIN WS_OUT;
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}
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<ATTR_W_TYPE>\n {
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add_attribute(attr_name,attr_id,attr_type,current_vendor,encrypted,has_tag);
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g_free(attr_id);
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g_free(attr_name);
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linenums[include_stack_ptr]++;
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has_tag = FALSE;
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encrypted=FALSE;
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BEGIN WS_OUT;
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}
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<ATTR_W_VENDOR>\n {
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add_attribute(attr_name,attr_id,attr_type,attr_vendor,encrypted,has_tag);
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g_free(attr_id);
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g_free(attr_vendor);
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g_free(attr_name);
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linenums[include_stack_ptr]++;
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BEGIN WS_OUT;
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};
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<VALUE>[0-9a-z_/-]+ { attr_name = g_strdup(yytext); BEGIN VALUE_W_ATTR; }
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<VALUE_W_ATTR>[^[:blank:]]+ { value_repr = g_strdup(yytext); BEGIN VALUE_W_NAME; }
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<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;}
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<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;}
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<INCLUDE>[^[:blank:]\n]+ {
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if ( include_stack_ptr >= MAX_INCLUDE_DEPTH ) {
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g_string_append_printf(error, "$INCLUDE files nested to deeply\n");
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yyterminate();
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}
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include_stack[include_stack_ptr++] = YY_CURRENT_BUFFER;
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fullpaths[include_stack_ptr] = g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s",
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directory,yytext);
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yyin = ws_fopen( fullpaths[include_stack_ptr], "r" );
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if (!yyin) {
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if (errno) {
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g_string_append_printf(error, "Could not open file: '%s', error: %s\n", fullpaths[include_stack_ptr], strerror(errno) );
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yyterminate();
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}
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} else {
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linenums[include_stack_ptr] = 1;
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yy_switch_to_buffer(yy_create_buffer( yyin, YY_BUF_SIZE ) );
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}
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BEGIN WS_OUT;
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}
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<<EOF>> {
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fclose(yyin);
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yyin = NULL;
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if ( --include_stack_ptr < 0 ) {
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yyterminate();
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} else {
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g_free(fullpaths[include_stack_ptr+1]);
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fullpaths[include_stack_ptr+1] = NULL;
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yy_delete_buffer( YY_CURRENT_BUFFER );
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yy_switch_to_buffer(include_stack[include_stack_ptr]);
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}
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BEGIN WS_OUT;
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}
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\n { linenums[include_stack_ptr]++; BEGIN WS_OUT; }
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%%
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void add_vendor(const gchar* name, guint32 vendor_id) {
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radius_vendor_info_t* v;
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v=g_hash_table_lookup(dict->vendors_by_id, GUINT_TO_POINTER(vendor_id));
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if (!v) {
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v = g_malloc(sizeof(radius_vendor_info_t));
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v->attrs_by_id = g_hash_table_new(g_direct_hash,g_direct_equal);
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v->code = vendor_id;
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v->ett = -1;
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v->name = NULL;
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}
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if (v->name)
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g_free((gpointer) v->name);
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v->name = g_strdup(name);
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g_hash_table_insert(dict->vendors_by_id,GUINT_TO_POINTER(v->code),v);
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g_hash_table_insert(dict->vendors_by_name, (gpointer) v->name, v);
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}
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void add_attribute(const gchar* name, const gchar* codestr, radius_attr_dissector_t type, const gchar* vendor_name, gboolean crypt, gboolean tagged) {
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radius_attr_info_t* a;
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GHashTable* by_id;
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guint32 code;
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if (vendor_name) {
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radius_vendor_info_t* v;
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v = g_hash_table_lookup(dict->vendors_by_name,vendor_name);
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if (! v) {
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g_string_append_printf(error, "Vendor: '%s', does not exist in %s:%i \n", vendor_name, fullpaths[include_stack_ptr], linenums[include_stack_ptr] );
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BEGIN JUNK;
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return;
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} else {
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by_id = v->attrs_by_id;
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}
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} else {
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by_id = dict->attrs_by_id;
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}
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code=strtol(codestr, NULL, 10);
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a=g_hash_table_lookup(by_id, GUINT_TO_POINTER(code));
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if (!a) {
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a = g_malloc(sizeof(radius_attr_info_t));
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a->name = NULL;
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a->dissector = NULL;
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}
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a->code = code;
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a->encrypt = crypt;
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a->tagged = tagged;
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a->type = type;
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a->vs = NULL;
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a->hf = -1;
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a->hf64 = -1;
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a->hf_tag = -1;
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a->hf_len = -1;
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a->ett = -1;
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if (a->name)
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g_free((gpointer) a->name);
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a->name = g_strdup(name);
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g_hash_table_insert(by_id, GUINT_TO_POINTER(code),a);
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g_hash_table_insert(dict->attrs_by_name,(gpointer) (a->name),a);
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}
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void add_value(const gchar* attrib_name, const gchar* value_repr, long value) {
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value_string v;
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GArray* a = g_hash_table_lookup(value_strings,attrib_name);
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if (! a) {
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a = g_array_new(TRUE,TRUE,sizeof(value_string));
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g_hash_table_insert(value_strings,g_strdup(attrib_name),a);
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}
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v.value = value;
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v.strptr = g_strdup(value_repr);
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g_array_append_val(a,v);
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}
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static void setup_attrs(gpointer k _U_, gpointer v, gpointer p _U_) {
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radius_attr_info_t* a = v;
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gpointer key;
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union {
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GArray* a;
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gpointer p;
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} vs;
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if (g_hash_table_lookup_extended(value_strings,a->name,&key,&vs.p) ) {
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a->vs = (value_string*) vs.a->data;
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g_array_free(vs.a,FALSE);
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g_hash_table_remove(value_strings,key);
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g_free(key);
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}
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}
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static void setup_vendors(gpointer k _U_, gpointer v, gpointer p) {
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radius_vendor_info_t* vnd = v;
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g_hash_table_foreach(vnd->attrs_by_id,setup_attrs,p);
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}
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static gboolean destroy_value_strings(gpointer k, gpointer v, gpointer p _U_) {
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value_string* vs = (value_string*)(((GArray*)v)->data);
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g_free(k);
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for (;vs->strptr;vs++) {
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g_free((void*)vs->strptr);
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}
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g_array_free(v,TRUE);
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return TRUE;
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}
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static gboolean destroy_attrs(gpointer k _U_, gpointer v, gpointer p _U_) {
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radius_attr_info_t* a = v;
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int i;
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g_free((gpointer) (a->name));
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if (a->vs) {
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for(i=0; a->vs[i].strptr; i++) {
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g_free((void *)a->vs[i].strptr);
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}
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g_free((void *)a->vs);
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}
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g_free(a);
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return TRUE;
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}
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static gboolean destroy_vendors(gpointer k _U_, gpointer v, gpointer p) {
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radius_vendor_info_t* vnd = v;
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g_free( (gpointer) vnd->name);
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g_hash_table_foreach_remove(vnd->attrs_by_id,destroy_attrs,p);
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g_hash_table_destroy(vnd->attrs_by_id);
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g_free(vnd);
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return TRUE;
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}
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static void destroy_dict(radius_dictionary_t* d) {
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g_hash_table_foreach_remove(d->attrs_by_id,destroy_attrs,NULL);
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g_hash_table_foreach_remove(d->vendors_by_id,destroy_vendors,NULL);
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g_hash_table_destroy(d->vendors_by_id);
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g_hash_table_destroy(d->attrs_by_id);
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g_hash_table_destroy(d->vendors_by_name);
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g_hash_table_destroy(d->attrs_by_name);
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g_free(d);
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}
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gboolean radius_load_dictionary (radius_dictionary_t* d, gchar* dir, const gchar* filename, gchar** err_str) {
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int i;
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dict = d;
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directory = dir;
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fullpaths[include_stack_ptr] = g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s",
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directory,filename);
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error = g_string_new("");
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yyin = ws_fopen(fullpaths[include_stack_ptr],"r");
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if (!yyin) {
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g_string_append_printf(error, "Could not open file: '%s', error: %s\n", fullpaths[include_stack_ptr], strerror(errno) );
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g_free(fullpaths[include_stack_ptr]);
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*err_str = error->str;
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g_string_free(error,FALSE);
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return FALSE;
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}
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value_strings = g_hash_table_new(g_str_hash,g_str_equal);
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BEGIN WS_OUT;
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yylex();
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if (yyin != NULL) fclose(yyin);
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yyin = NULL;
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for (i=0; i < 10; i++) {
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if (fullpaths[i]) g_free(fullpaths[i]);
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}
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g_hash_table_foreach(dict->attrs_by_id,setup_attrs,NULL);
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g_hash_table_foreach(dict->vendors_by_id,setup_vendors,NULL);
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g_hash_table_foreach_remove(value_strings,destroy_value_strings,NULL);
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if (error->len > 0) {
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*err_str = error->str;
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g_string_free(error,FALSE);
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destroy_dict(dict);
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return FALSE;
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} else {
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*err_str = NULL;
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g_string_free(error,TRUE);
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return TRUE;
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}
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}
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/*
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* We want to stop processing when we get to the end of the input.
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* (%option noyywrap is not used because if used then
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* some flex versions (eg: 2.5.35) generate code which causes
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* warnings by the Windows VC compiler).
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*/
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int yywrap(void) {
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return 1;
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}
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