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wireshark/epan/radius_dict.l

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/*
* We don't use input, so don't generate code for it.
*/
%option noinput
/*
* We don't use unput, so don't generate code for it.
*/
%option nounput
/*
* We don't read interactively from the terminal.
*/
%option never-interactive
/*
* We want to stop processing when we get to the end of the input.
*/
%option noyywrap
/*
* 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
*
* 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.
*/
#include "config.h"
#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 <wsutil/file_util.h>
#ifdef _WIN32
/* disable Windows VC compiler warning "signed/unsigned mismatch" associated */
/* with YY_INPUT code generated by flex versions such as 2.5.35. */
#pragma warning (disable:4018)
#endif
#define ECHO
#define MAX_INCLUDE_DEPTH 10
static void add_vendor(const gchar* name, guint32 id, guint type_octets, guint length_octets, gboolean has_flags);
static void add_value(const gchar* attrib_name,const gchar* repr, guint32 value);
static void add_tlv(const gchar* name, const gchar* code, radius_attr_dissector_t type, const gchar* attr);
static void add_attribute(const gchar*,const gchar*, radius_attr_dissector_t,const gchar*, guint, gboolean, const gchar*);
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 guint32 vendor_id = 0;
static guint vendor_type_octets = 1;
static guint vendor_length_octets = 1;
static gboolean vendor_has_flags = FALSE;
static gchar* value_repr = NULL;
static guint encrypted = 0;
static gboolean has_tag = FALSE;
static gchar* current_vendor = NULL;
static gchar* current_attr = 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};
%}
/* Note: FreeRadius allows VENDOR, ATTRIBUTE and VALUE names to contain any non-blank character.
* Using a negated "blank character class" pattern below for those names fails for some reason
* so for now the patterns for each name type include those characters found for the corresponding
* name types in the FreeRadius dictionaries.
*/
%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 VENDOR_W_ID VENDOR_W_FORMAT VENDOR_W_TYPE_OCTETS VENDOR_W_LENGTH_OCTETS VENDOR_W_CONTINUATION BEGIN_TLV END_TLV
%%
[: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; }
<WS_OUT>BEGIN-TLV { BEGIN BEGIN_TLV; }
<WS_OUT>END-TLV { BEGIN END_TLV; }
<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;
}
<BEGIN_TLV>[0-9a-z_-]+ {
if (current_attr) {
g_free(current_attr);
}
current_attr = g_strdup(yytext);
BEGIN WS_OUT;
}
<END_TLV>[^\n]* {
if (current_attr) {
g_free(current_attr);
current_attr = NULL;
}
BEGIN WS_OUT;
}
<VENDOR>[0-9a-z_-]+ {
vendor_name = g_strdup(yytext);
vendor_type_octets = 1;
vendor_length_octets = 1;
vendor_has_flags = FALSE;
BEGIN VENDOR_W_NAME;
}
<VENDOR_W_NAME>[0-9]+ {
vendor_id = (guint32) strtoul(yytext,NULL,10);
BEGIN VENDOR_W_ID;
}
<VENDOR_W_NAME>0x[0-9a-f]+ {
vendor_id = (guint32) strtoul(yytext,NULL,16);
BEGIN VENDOR_W_ID;
}
<VENDOR_W_ID>format= {
BEGIN VENDOR_W_FORMAT;
}
<VENDOR_W_FORMAT>[124] {
vendor_type_octets = (guint) strtoul(yytext,NULL,10);
BEGIN VENDOR_W_TYPE_OCTETS;
}
<VENDOR_W_TYPE_OCTETS>,[012] {
vendor_length_octets = (guint) strtoul(yytext+1,NULL,10);
BEGIN VENDOR_W_LENGTH_OCTETS;
}
<VENDOR_W_LENGTH_OCTETS>,c {
vendor_has_flags = TRUE;
BEGIN VENDOR_W_CONTINUATION;
}
<VENDOR_W_FORMAT>\n |
<VENDOR_W_TYPE_OCTETS>\n |
<VENDOR_W_LENGTH_OCTETS>\n |
<VENDOR_W_CONTINUATION>\n |
<VENDOR_W_ID>\n {
add_vendor(vendor_name, vendor_id, vendor_type_octets, vendor_length_octets, vendor_has_flags);
g_free(vendor_name);
BEGIN WS_OUT;
}
<ATTR>[0-9a-z_/.-]+ { attr_name = g_strdup(yytext); encrypted = 0; 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>ipv6prefix { attr_type = radius_ipv6prefix; 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>abinary { attr_type = radius_abinary; BEGIN ATTR_W_TYPE; }
<ATTR_W_ID>ether { attr_type = radius_ether; BEGIN ATTR_W_TYPE; }
<ATTR_W_ID>ifid { attr_type = radius_ifid; BEGIN ATTR_W_TYPE; }
<ATTR_W_ID>byte { attr_type = radius_integer; BEGIN ATTR_W_TYPE; }
<ATTR_W_ID>short { attr_type = radius_integer; BEGIN ATTR_W_TYPE; }
<ATTR_W_ID>signed { attr_type = radius_signed; BEGIN ATTR_W_TYPE; }
<ATTR_W_ID>combo-ip { attr_type = radius_combo_ip; BEGIN ATTR_W_TYPE; }
<ATTR_W_ID>tlv { attr_type = radius_tlv; 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=[123][,]? { encrypted = (guint) strtoul(yytext+8,NULL,10); }
<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,current_attr);
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,current_attr);
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,current_attr);
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, (guint32) strtoul(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, (guint32) strtoul(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_append_printf(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 = ws_fopen( fullpaths[include_stack_ptr], "r" );
if (!yyin) {
if (errno) {
g_string_append_printf(error,
"Could not open file: '%s', error: %s\n",
fullpaths[include_stack_ptr],
g_strerror(errno) );
} else {
g_string_append_printf(error,
"Could not open file: '%s', no errno\n",
fullpaths[include_stack_ptr]);
}
g_free(fullpaths[include_stack_ptr]);
fullpaths[include_stack_ptr] = NULL;
include_stack_ptr--;
} 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; }
%%
static void add_vendor(const gchar* name, guint32 id, guint type_octets, guint length_octets, gboolean has_flags) {
radius_vendor_info_t* v;
v = (radius_vendor_info_t *)g_hash_table_lookup(dict->vendors_by_id, GUINT_TO_POINTER(id));
if (!v) {
/*
* New vendor.
* Allocate a new entry and insert it into the by-ID and
* by-name hash tables.
*/
v = g_new(radius_vendor_info_t,1);
v->attrs_by_id = g_hash_table_new(g_direct_hash,g_direct_equal);
v->code = id;
v->ett = -1;
v->name = g_strdup(name);
v->type_octets = type_octets;
v->length_octets = length_octets;
v->has_flags = has_flags;
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);
} else {
/*
* This vendor is already in the table.
*
* Assume that the dictionary knows the 'ground truth' about
* the type/length/has_flags information and thus allow the
* dictionary to overwrite these values even for vendors that
* have already been loaded.
*
* XXX - this could be due to the vendor being in multiple
* dictionary files, rather than having been specially
* entered by the RADIUS dissector, as a side effect of
* specially entering an attribute; should we report vendors
* that appear in different dictionaries with different
* properties?
*/
v->type_octets = type_octets;
v->length_octets = length_octets;
v->has_flags = has_flags;
/*
* Did the name change?
*/
if (g_strcmp0(v->name, name) != 0) {
/*
* Yes. Remove the entry from the by-name hash table
* and re-insert it with the new name.
*/
g_hash_table_remove(dict->vendors_by_name, (gpointer) v->name);
g_free((gpointer) v->name);
v->name = g_strdup(name);
g_hash_table_insert(dict->vendors_by_name, (gpointer) v->name, v);
}
}
}
static void add_attribute(const gchar* name, const gchar* codestr, radius_attr_dissector_t type, const gchar* vendor, guint encrypted_flag, gboolean tagged, const gchar* attr) {
radius_attr_info_t* a;
GHashTable* by_id;
guint32 code;
if (attr){
add_tlv(name, codestr, type, attr);
return;
}
if (vendor) {
radius_vendor_info_t* v;
v = (radius_vendor_info_t *)g_hash_table_lookup(dict->vendors_by_name,vendor);
if (! v) {
g_string_append_printf(error, "Vendor: '%s', does not exist in %s:%i \n", vendor, 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;
}
code= (guint32) strtoul(codestr, NULL, 10);
a=(radius_attr_info_t*)g_hash_table_lookup(by_id, GUINT_TO_POINTER(code));
if (!a) {
/*
* New attribute.
* Allocate a new entry and insert it into the by-ID and
* by-name hash tables.
*/
a = g_new(radius_attr_info_t,1);
a->code = code;
a->name = g_strdup(name);
a->dissector = NULL;
a->encrypt = encrypted_flag;
a->tagged = tagged;
a->type = type;
a->vs = NULL;
a->hf = -1;
a->hf_alt = -1;
a->hf_tag = -1;
a->hf_len = -1;
a->ett = -1;
a->tlvs_by_id = NULL;
g_hash_table_insert(by_id, GUINT_TO_POINTER(code),a);
g_hash_table_insert(dict->attrs_by_name,(gpointer) (a->name),a);
} else {
/*
* This attribute is already in the table.
*
* Overwrite the encrypted flag, tagged property, and type;
* the other properties don't get set until after we've
* finished reading the dictionaries.
*
* XXX - this could be due to the attribute being in
* multiple dictionary files, rather than having been
* specially entered by the RADIUS dissector to give it
* a special dissection routine; should we report attributes
* that appear in different dictionaries with different
* properties?
*/
a->encrypt = encrypted_flag;
a->tagged = tagged;
a->type = type;
/*
* Did the name change?
*/
if (g_strcmp0(a->name, name) != 0) {
/*
* Yes. Remove the entry from the by-name hash table
* and re-insert it with the new name.
*/
g_hash_table_remove(dict->attrs_by_name, (gpointer) (a->name));
g_free((gpointer) a->name);
a->name = g_strdup(name);
g_hash_table_insert(dict->attrs_by_name, (gpointer) (a->name),a);
}
}
}
static void add_tlv(const gchar* name, const gchar* codestr, radius_attr_dissector_t type, const gchar* attr) {
radius_attr_info_t* a;
radius_attr_info_t* s;
guint32 code;
a = (radius_attr_info_t*)g_hash_table_lookup(dict->attrs_by_name, attr);
if (! a) {
g_string_append_printf(error, "Attr: '%s', does not exist in %s:%i \n", attr, fullpaths[include_stack_ptr], linenums[include_stack_ptr]);
BEGIN JUNK;
return;
}
if (type == radius_tlv) {
g_string_append_printf(error, "sub-TLV: '%s', sub-TLV's type is specified as tlv in %s:%i \n", name, fullpaths[include_stack_ptr], linenums[include_stack_ptr]);
BEGIN JUNK;
return;
}
if (! a->tlvs_by_id) {
a->tlvs_by_id = g_hash_table_new(g_direct_hash,g_direct_equal);
}
code = (guint32) strtoul(codestr, NULL, 10);
s = (radius_attr_info_t*)g_hash_table_lookup(a->tlvs_by_id, GUINT_TO_POINTER(code));
if (!s) {
/*
* This TLV doesn't yet exist in this attribute's TLVs-by-ID
* hash table. Add it.
*/
s = g_new(radius_attr_info_t,1);
s->name = g_strdup(name);
s->dissector = NULL;
s->code = code;
s->type = type;
s->encrypt = FALSE;
s->tagged = FALSE;
s->dissector = NULL;
s->vs = NULL;
s->hf = -1;
s->hf_alt = -1;
s->hf_tag = -1;
s->hf_len = -1;
s->ett = -1;
s->tlvs_by_id = NULL;
g_hash_table_insert(a->tlvs_by_id,GUINT_TO_POINTER(s->code),s);
g_hash_table_insert(dict->tlvs_by_name,(gpointer) (s->name),s);
}
/*
* If it *does* exist, leave it alone; there shouldn't be duplicate
* entries by name in the dictionaries (even if there might be
* multiple entries for a given attribute in the dictionaries, each
* one adding some TLV values), and we don't directly add entries
* for TLVs in the RADIUS dissector.
*
* XXX - report the duplicate entries?
*/
}
void add_value(const gchar* attrib_name, const gchar* repr, guint32 value) {
value_string v;
GArray* a = (GArray*)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(repr);
g_array_append_val(a,v);
}
static void setup_tlvs(gpointer k _U_, gpointer v, gpointer p _U_) {
radius_attr_info_t* s = (radius_attr_info_t*)v;
gpointer key;
union {
GArray* a;
gpointer p;
} vs;
if (g_hash_table_lookup_extended(value_strings, s->name, &key, &vs.p)) {
s->vs = (value_string*)(void *)vs.a->data;
g_array_free(vs.a, FALSE);
g_hash_table_remove(value_strings, key);
g_free(key);
}
}
static void setup_attrs(gpointer k _U_, gpointer v, gpointer p _U_) {
radius_attr_info_t* a = (radius_attr_info_t*)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*)(void *)vs.a->data;
g_array_free(vs.a,FALSE);
g_hash_table_remove(value_strings,key);
g_free(key);
}
if (a->tlvs_by_id) {
g_hash_table_foreach(a->tlvs_by_id, setup_tlvs, p);
}
}
static void setup_vendors(gpointer k _U_, gpointer v, gpointer p) {
radius_vendor_info_t* vnd = (radius_vendor_info_t*)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*)(void *)(((GArray*)v)->data);
g_free(k);
for (;vs->strptr;vs++) {
g_free((void*)vs->strptr);
}
g_array_free((GArray*)v,TRUE);
return TRUE;
}
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 = ws_fopen(fullpaths[include_stack_ptr],"r");
if (!yyin) {
g_string_append_printf(error, "Could not open file: '%s', error: %s\n", fullpaths[include_stack_ptr], g_strerror(errno) );
g_free(fullpaths[include_stack_ptr]);
*err_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 = g_string_free(error,FALSE);
return FALSE;
} else {
*err_str = NULL;
g_string_free(error,TRUE);
return TRUE;
}
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
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