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Diffstat (limited to 'epan/dfilter-grammar.y')
| -rw-r--r-- | epan/dfilter-grammar.y | 1191 |
1 files changed, 0 insertions, 1191 deletions
diff --git a/epan/dfilter-grammar.y b/epan/dfilter-grammar.y deleted file mode 100644 index 757798c8ec..0000000000 --- a/epan/dfilter-grammar.y +++ /dev/null @@ -1,1191 +0,0 @@ -%{ -/* dfilter-grammar.y - * Parser for display filters - * - * $Id: dfilter-grammar.y,v 1.2 2000/12/22 12:05:36 gram Exp $ - * - * Ethereal - Network traffic analyzer - * By Gerald Combs <gerald@zing.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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#ifdef HAVE_SYS_TYPES_H -# include <sys/types.h> -#endif - -#ifdef HAVE_NETINET_IN_H -# include <netinet/in.h> -#endif - -#ifdef NEED_SNPRINTF_H -# ifdef HAVE_STDARG_H -# include <stdarg.h> -# else -# include <varargs.h> -# endif -# include "snprintf.h" -#endif - -#ifndef __GLIB_H__ -#include <glib.h> -#endif - -#include <string.h> -#include <errno.h> -#include <math.h> - -#ifndef _STDLIB_H -#include <stdlib.h> -#endif - -#ifndef __PROTO_H__ -#include "proto.h" -#endif - -#ifndef __PACKET_H__ -#include "packet.h" -#endif - -#ifndef __DFILTER_H__ -#include "dfilter.h" -#endif - -#include "dfilter-int.h" - -#ifndef __RESOLV_H__ -#include "resolv.h" -#endif - -static GNode* dfilter_mknode_join(GNode *n1, enum node_type ntype, int operand, GNode *n2); -static GNode* dfilter_mknode_unary(int operand, GNode *n2); -static GNode* dfilter_mknode_numeric_variable(gint id); -static GNode* dfilter_mknode_numeric_value(guint32 val); -static GNode* dfilter_mknode_floating_variable(gint id); -static GNode* dfilter_mknode_floating_value(double val); -static GNode* dfilter_mknode_ether_value(gchar*); -static GNode* dfilter_mknode_ether_variable(gint id); -static GNode* dfilter_mknode_ipxnet_value(guint32); -static GNode* dfilter_mknode_ipxnet_variable(gint id); -static GNode* dfilter_mknode_ipv4_value(char *host, int nmask_bits); -static GNode* dfilter_mknode_ipv4_variable(gint id); -static GNode* dfilter_mknode_ipv6_value(char *host); -static GNode* dfilter_mknode_ipv6_variable(gint id); -static GNode* dfilter_mknode_existence(gint id); -static GNode* dfilter_mknode_bytes_value(GByteArray *barray); -static GNode* dfilter_mknode_bytes_variable(gint id, gint offset, guint length, gboolean to_the_end); -static GNode* dfilter_mknode_string_value(char *s); -static GNode* dfilter_mknode_string_variable(gint id); - -static guint32 string_to_guint32(char *s, gboolean *success); -static double string_to_double(char *s, gboolean *success); -static int ether_str_to_guint8_array(const char *s, guint8 *mac); -static guint dfilter_get_bytes_variable_offset(GNode *gnode); -static guint dfilter_get_bytes_value_length(GNode* gnode); -static void dfilter_set_bytes_variable_length(GNode *gnode, guint length); -static guint dfilter_get_bytes_variable_length(GNode *gnode); -static gint dfilter_get_bytes_variable_field_registered_length(GNode *gnode); -static char* dfilter_get_variable_abbrev(GNode *gnode); -static int check_bytes_variable_sanity(GNode *gnode); - -/* This is the dfilter we're currently processing. It's how - * dfilter_compile communicates with us. - */ -dfilter *global_df = NULL; - -%} - -%union { - gint operand; /* logical, relation, alternation */ - struct { - gint id; - gint type; /* using macros defined below, in this yacc grammar */ - } variable; - GNode* node; - gchar* string; - struct { - gint offset; - guint length; - } byte_range; -} - -%type <node> statement expression relation -%type <node> numeric_value numeric_variable -%type <node> floating_value floating_variable -%type <node> ether_value ether_variable -%type <node> ipxnet_value ipxnet_variable -%type <node> ipv4_value ipv4_variable -%type <node> ipv6_value ipv6_variable -%type <node> string_value string_variable -%type <node> variable_name -%type <node> bytes_value bytes_variable - -%type <operand> numeric_relation -%type <operand> equality_relation -%type <operand> bytes_relation - -%type <variable> any_variable_type - -%token <variable> T_FT_UINT8 -%token <variable> T_FT_UINT16 -%token <variable> T_FT_UINT24 -%token <variable> T_FT_UINT32 -%token <variable> T_FT_INT8 -%token <variable> T_FT_INT16 -%token <variable> T_FT_INT24 -%token <variable> T_FT_INT32 -%token <variable> T_FT_ETHER -%token <variable> T_FT_IPv4 -%token <variable> T_FT_IPv6 -%token <variable> T_FT_NONE -%token <variable> T_FT_BYTES -%token <variable> T_FT_BOOLEAN -%token <variable> T_FT_STRING -%token <variable> T_FT_IPXNET -%token <variable> T_FT_DOUBLE - -%token <string> T_VAL_UNQUOTED_STRING -%token <string> T_VAL_QUOTED_STRING -%token <string> T_VAL_BYTE_STRING -%token <byte_range> T_VAL_BYTE_RANGE - -%token <operand> TOK_AND TOK_OR TOK_NOT TOK_XOR -%token <operand> TOK_EQ TOK_NE TOK_GT TOK_GE TOK_LT TOK_LE - -%expect 4 -%left TOK_AND -%left TOK_OR TOK_XOR -%nonassoc TOK_NOT - -%% - -statement: expression - { - global_df->dftree = $1; - } - | /* NULL */ { if (global_df != NULL) global_df->dftree = NULL; } - ; - -expression: '(' expression ')' { $$ = $2; } - | expression TOK_AND expression { $$ = dfilter_mknode_join($1, logical, $2, $3); } - | expression TOK_OR expression { $$ = dfilter_mknode_join($1, logical, $2, $3); } - | expression TOK_XOR expression { $$ = dfilter_mknode_join($1, logical, $2, $3); } - | TOK_NOT expression { $$ = dfilter_mknode_unary(TOK_NOT, $2); } - | relation { $$ = $1; } - | variable_name { $$ = $1; } - | expression error { YYABORT; } - ; - -relation: numeric_variable numeric_relation numeric_value - { - $$ = dfilter_mknode_join($1, relation, $2, $3); - } - | numeric_variable numeric_relation numeric_variable - { - $$ = dfilter_mknode_join($1, relation, $2, $3); - } - - | floating_variable numeric_relation floating_value - { - $$ = dfilter_mknode_join($1, relation, $2, $3); - } - | floating_variable numeric_relation floating_variable - { - $$ = dfilter_mknode_join($1, relation, $2, $3); - } - - | ether_variable equality_relation ether_value - { - $$ = dfilter_mknode_join($1, relation, $2, $3); - } - | ether_variable equality_relation ether_variable - { - $$ = dfilter_mknode_join($1, relation, $2, $3); - } - - | ipxnet_variable equality_relation ipxnet_value - { - $$ = dfilter_mknode_join($1, relation, $2, $3); - } - | ipxnet_variable equality_relation ipxnet_variable - { - $$ = dfilter_mknode_join($1, relation, $2, $3); - } - - | string_variable equality_relation string_value - { - $$ = dfilter_mknode_join($1, relation, $2, $3); - } - | string_variable equality_relation string_variable - { - $$ = dfilter_mknode_join($1, relation, $2, $3); - } - - - | ipv4_variable numeric_relation ipv4_value - { - $$ = dfilter_mknode_join($1, relation, $2, $3); - } - | ipv4_variable numeric_relation ipv4_variable - { - $$ = dfilter_mknode_join($1, relation, $2, $3); - } - - | ipv6_variable equality_relation ipv6_value - { - $$ = dfilter_mknode_join($1, relation, $2, $3); - } - | ipv6_variable equality_relation ipv6_variable - { - $$ = dfilter_mknode_join($1, relation, $2, $3); - } - - | bytes_variable bytes_relation bytes_value - { - int a_len, b_len; - - a_len = dfilter_get_bytes_variable_length($1); - b_len = dfilter_get_bytes_value_length($3); - - if (a_len == 0) { - dfilter_set_bytes_variable_length($1, b_len); - a_len = b_len; - } - - if (!check_bytes_variable_sanity($1)) { - YYERROR; - } - - if (a_len != b_len) { - dfilter_fail("Field \"%s\" has %u byte%s being compared, but %u byte%s " - "%s supplied.", - dfilter_get_variable_abbrev($1), - a_len, plurality(a_len, "", "s"), - b_len, plurality(b_len, "", "s"), - plurality(b_len, "was", "were")); - YYERROR; - } - - $$ = dfilter_mknode_join($1, relation, $2, $3); - } - | bytes_variable bytes_relation bytes_variable - { - int a_len, b_len; - - a_len = dfilter_get_bytes_variable_length($1); - b_len = dfilter_get_bytes_variable_length($3); - - if (!check_bytes_variable_sanity($1)) { - YYERROR; - } - - if (!check_bytes_variable_sanity($3)) { - YYERROR; - } - - if (a_len != b_len) { - dfilter_fail("Fields \"%s\" and \"%s\" are being compared with " - "disparate lengths of %u byte%s and %u byte%s.", - dfilter_get_variable_abbrev($1), - dfilter_get_variable_abbrev($3), - a_len, plurality(a_len, "", "s"), - b_len, plurality(b_len, "", "s")); - YYERROR; - } - - $$ = dfilter_mknode_join($1, relation, $2, $3); - } - - ; - - -numeric_value: T_VAL_UNQUOTED_STRING - { - gboolean success; - $$ = dfilter_mknode_numeric_value(string_to_guint32($1, &success)); - g_free($1); - if (!success) { - YYERROR; - } - } - ; - -ether_value: T_VAL_BYTE_STRING - { - $$ = dfilter_mknode_ether_value($1); - g_free($1); - if ($$ == NULL) { - YYERROR; - } - } - ; - -string_value: T_VAL_UNQUOTED_STRING - { - $$ = dfilter_mknode_string_value($1); - g_free($1); - if ($$ == NULL) { - YYERROR; - } - } - | T_VAL_QUOTED_STRING - { - $$ = dfilter_mknode_string_value($1); - g_free($1); - if ($$ == NULL) { - YYERROR; - } - } - ; - -ipxnet_value: T_VAL_UNQUOTED_STRING - { - gboolean success; - $$ = dfilter_mknode_ipxnet_value(string_to_guint32($1, &success)); - g_free($1); - if (!success) { - YYERROR; - } - } - ; - -floating_value: T_VAL_UNQUOTED_STRING - { - gboolean success; - $$ = dfilter_mknode_floating_value(string_to_double($1, &success)); - g_free($1); - if (!success) { - YYERROR; - } - } - - | T_VAL_BYTE_STRING - { - /* e.g., 0.0, 0.1, 0.01 ... */ - gboolean success; - $$ = dfilter_mknode_floating_value(string_to_double($1, &success)); - g_free($1); - if (!success) { - YYERROR; - } - } - ; - -ipv4_value: T_VAL_UNQUOTED_STRING - { - $$ = dfilter_mknode_ipv4_value($1, 32); - g_free($1); - if ($$ == NULL) { - YYERROR; - } - } - - | T_VAL_BYTE_STRING - { - $$ = dfilter_mknode_ipv4_value($1, 32); - g_free($1); - if ($$ == NULL) { - YYERROR; - } - } - - | T_VAL_UNQUOTED_STRING '/' T_VAL_UNQUOTED_STRING - { - gboolean success; - guint32 nmask_bits; - - nmask_bits = string_to_guint32($3, &success); - if (!success) { - g_free($1); - g_free($3); - YYERROR; - } - - if (nmask_bits > 32) { - dfilter_fail("The number of netmask bits in \"%s/%s\" should " - "be between 0 and 32.", $1, $3); - g_free($1); - g_free($3); - YYERROR; - } - - $$ = dfilter_mknode_ipv4_value($1, nmask_bits); - g_free($1); - g_free($3); - if ($$ == NULL) { - YYERROR; - } - } - - | T_VAL_BYTE_STRING '/' T_VAL_UNQUOTED_STRING - { - gboolean success; - guint32 nmask_bits; - - nmask_bits = string_to_guint32($3, &success); - if (!success) { - g_free($1); - g_free($3); - YYERROR; - } - - if (nmask_bits > 32) { - dfilter_fail("The number of netmask bits in \"%s/%s\" should " - "be between 0 and 32.", $1, $3); - g_free($1); - g_free($3); - YYERROR; - } - $$ = dfilter_mknode_ipv4_value($1, nmask_bits); - g_free($1); - g_free($3); - if ($$ == NULL) { - YYERROR; - } - } - ; - -ipv6_value: T_VAL_UNQUOTED_STRING - { - $$ = dfilter_mknode_ipv6_value($1); - g_free($1); - if ($$ == NULL) { - YYERROR; - } - } - - | T_VAL_BYTE_STRING - { - $$ = dfilter_mknode_ipv6_value($1); - g_free($1); - if ($$ == NULL) { - YYERROR; - } - } - ; - -bytes_value: T_VAL_BYTE_STRING - { - GByteArray *barray; - - /* the next function appends to list_of_byte_arrays for me */ - barray = byte_str_to_guint8_array($1); - $$ = dfilter_mknode_bytes_value(barray); - g_free($1); - } - - | T_VAL_UNQUOTED_STRING - { - gboolean success; - guint32 val32; - guint8 val8; - GByteArray *barray; - - val32 = string_to_guint32($1, &success); - if (!success) { - g_free($1); - YYERROR; - } - if (val32 > 0xff) { - dfilter_fail("The value \"%s\" cannot be stored in a single-byte byte-string. " - "Use the multi-byte \"xx:yy\" representation.", $1); - g_free($1); - YYERROR; - } - val8 = (guint8) val32; - barray = g_byte_array_new(); - global_df->list_of_byte_arrays = g_slist_append(global_df->list_of_byte_arrays, barray); - g_byte_array_append(barray, &val8, 1); - - $$ = dfilter_mknode_bytes_value(barray); - g_free($1); - } - ; - -numeric_variable: T_FT_UINT8 { $$ = dfilter_mknode_numeric_variable($1.id); } - | T_FT_UINT16 { $$ = dfilter_mknode_numeric_variable($1.id); } - | T_FT_UINT24 { $$ = dfilter_mknode_numeric_variable($1.id); } - | T_FT_UINT32 { $$ = dfilter_mknode_numeric_variable($1.id); } - | T_FT_INT8 { $$ = dfilter_mknode_numeric_variable($1.id); } - | T_FT_INT16 { $$ = dfilter_mknode_numeric_variable($1.id); } - | T_FT_INT24 { $$ = dfilter_mknode_numeric_variable($1.id); } - | T_FT_INT32 { $$ = dfilter_mknode_numeric_variable($1.id); } - ; - -ether_variable: T_FT_ETHER { $$ = dfilter_mknode_ether_variable($1.id); } - ; - -floating_variable: T_FT_DOUBLE { $$ = dfilter_mknode_floating_variable($1.id); } - ; - -ipxnet_variable: T_FT_IPXNET { $$ = dfilter_mknode_ipxnet_variable($1.id); } - ; - -ipv4_variable: T_FT_IPv4 { $$ = dfilter_mknode_ipv4_variable($1.id); } - ; - -ipv6_variable: T_FT_IPv6 { $$ = dfilter_mknode_ipv6_variable($1.id); } - ; - -string_variable: T_FT_STRING { $$ = dfilter_mknode_string_variable($1.id); } - ; - -bytes_variable: T_FT_BYTES T_VAL_BYTE_RANGE - { - $$ = dfilter_mknode_bytes_variable($1.id, $2.offset, $2.length, FALSE); - } - - | T_FT_BYTES - { - $$ = dfilter_mknode_bytes_variable($1.id, 0, 0, TRUE); - } - - ; - -variable_name: any_variable_type - { - GNode *variable; - GNode *value; - if ($1.type == T_FT_BOOLEAN) { - /* Make "variable == TRUE" for BOOLEAN variable */ - variable = dfilter_mknode_numeric_variable($1.id); - value = dfilter_mknode_numeric_value(TRUE); - $$ = dfilter_mknode_join(variable, relation, TOK_EQ, value); - } - else { - $$ = dfilter_mknode_existence($1.id); - } - } - ; - -any_variable_type: T_FT_UINT8 { $$ = $1; } - | T_FT_UINT16 { $$ = $1; } - | T_FT_UINT24 { $$ = $1; } - | T_FT_UINT32 { $$ = $1; } - | T_FT_INT8 { $$ = $1; } - | T_FT_INT16 { $$ = $1; } - | T_FT_INT24 { $$ = $1; } - | T_FT_INT32 { $$ = $1; } - | T_FT_DOUBLE { $$ = $1; } - | T_FT_ETHER { $$ = $1; } - | T_FT_IPv4 { $$ = $1; } - | T_FT_IPv6 { $$ = $1; } - | T_FT_IPXNET { $$ = $1; } - | T_FT_NONE { $$ = $1; } - | T_FT_BYTES { $$ = $1; } - | T_FT_BOOLEAN { $$ = $1; } - | T_FT_STRING { $$ = $1; } - ; - -numeric_relation: TOK_EQ { $$ = TOK_EQ; } - | TOK_NE { $$ = TOK_NE; } - | TOK_GT { $$ = TOK_GT; } - | TOK_GE { $$ = TOK_GE; } - | TOK_LT { $$ = TOK_LT; } - | TOK_LE { $$ = TOK_LE; } - ; - -equality_relation: TOK_EQ { $$ = TOK_EQ; } - | TOK_NE { $$ = TOK_NE; } - ; - -bytes_relation: TOK_EQ { $$ = TOK_EQ; } - | TOK_NE { $$ = TOK_NE; } - | TOK_GT { $$ = TOK_GT; } - | TOK_LT { $$ = TOK_LT; } - ; - -%% - -static GNode* -dfilter_mknode_join(GNode *n1, enum node_type ntype, int operand, GNode *n2) -{ - dfilter_node *node_root; - GNode *gnode_root; - - node_root = g_mem_chunk_alloc(global_df->node_memchunk); - node_root->ntype = ntype; - node_root->elem_size = 0; - node_root->fill_array_variable_func = NULL; - node_root->fill_array_value_func = NULL; - node_root->check_relation_func = NULL; - if (ntype == relation) { - node_root->value.relation = operand; - } - else if (ntype == logical) { - node_root->value.logical = operand; - } - else { - g_assert_not_reached(); - } - - gnode_root = g_node_new(node_root); - g_node_append(gnode_root, n1); - g_node_append(gnode_root, n2); - - return gnode_root; -} - -static GNode* -dfilter_mknode_unary(int operand, GNode *n2) -{ - dfilter_node *node_root; - GNode *gnode_root; - - node_root = g_mem_chunk_alloc(global_df->node_memchunk); - node_root->ntype = logical; - node_root->value.logical = operand; - node_root->elem_size = 0; - node_root->fill_array_variable_func = NULL; - node_root->fill_array_value_func = NULL; - node_root->check_relation_func = NULL; - - gnode_root = g_node_new(node_root); - g_node_append(gnode_root, n2); - - return gnode_root; -} - - -static GNode* -dfilter_mknode_numeric_variable(gint id) -{ - dfilter_node *node; - GNode *gnode; - - node = g_mem_chunk_alloc(global_df->node_memchunk); - node->ntype = variable; - node->elem_size = sizeof(guint32); - node->fill_array_variable_func = fill_array_numeric_variable; - node->fill_array_value_func = NULL; - node->check_relation_func = check_relation_numeric; - node->value.variable = id; - gnode = g_node_new(node); - - return gnode; -} - -static GNode* -dfilter_mknode_ether_variable(gint id) -{ - dfilter_node *node; - GNode *gnode; - - node = g_mem_chunk_alloc(global_df->node_memchunk); - node->ntype = variable; - node->elem_size = sizeof(guint8) * 6; - node->fill_array_variable_func = fill_array_ether_variable; - node->fill_array_value_func = NULL; - node->check_relation_func = check_relation_ether; - node->value.variable = id; - gnode = g_node_new(node); - - return gnode; -} - -static GNode* -dfilter_mknode_floating_variable(gint id) -{ - dfilter_node *node; - GNode *gnode; - - node = g_mem_chunk_alloc(global_df->node_memchunk); - node->ntype = variable; - node->elem_size = sizeof(double); - node->fill_array_variable_func = fill_array_floating_variable; - node->fill_array_value_func = NULL; - node->check_relation_func = check_relation_floating; - node->value.variable = id; - gnode = g_node_new(node); - - return gnode; -} - -static GNode* -dfilter_mknode_ipxnet_variable(gint id) -{ - dfilter_node *node; - GNode *gnode; - - node = g_mem_chunk_alloc(global_df->node_memchunk); - node->ntype = variable; - node->elem_size = sizeof(guint8) * 4; - node->fill_array_variable_func = fill_array_numeric_variable; /* cheating ! */ - node->fill_array_value_func = NULL; - node->check_relation_func = check_relation_numeric; /* cheating ! */ - node->value.variable = id; - gnode = g_node_new(node); - - return gnode; -} - -static GNode* -dfilter_mknode_ipv4_variable(gint id) -{ - dfilter_node *node; - GNode *gnode; - - node = g_mem_chunk_alloc(global_df->node_memchunk); - node->ntype = variable; - node->elem_size = sizeof(ipv4_addr); - node->fill_array_variable_func = fill_array_ipv4_variable; - node->fill_array_value_func = NULL; - node->check_relation_func = check_relation_ipv4; - node->value.variable = id; - gnode = g_node_new(node); - - return gnode; -} - -static GNode* -dfilter_mknode_ipv6_variable(gint id) -{ - dfilter_node *node; - GNode *gnode; - - node = g_mem_chunk_alloc(global_df->node_memchunk); - node->ntype = variable; - node->elem_size = 16; - node->fill_array_variable_func = fill_array_ipv6_variable; - node->fill_array_value_func = NULL; - node->check_relation_func = check_relation_ipv6; - node->value.variable = id; - gnode = g_node_new(node); - - return gnode; -} - -static GNode* -dfilter_mknode_string_variable(gint id) -{ - dfilter_node *node; - GNode *gnode; - - node = g_mem_chunk_alloc(global_df->node_memchunk); - node->ntype = variable; - node->elem_size = sizeof(char*); - node->fill_array_variable_func = fill_array_string_variable; - node->fill_array_value_func = NULL; - node->check_relation_func = check_relation_string; - node->value.variable = id; - gnode = g_node_new(node); - - return gnode; -} - -static GNode* -dfilter_mknode_bytes_variable(gint id, gint offset, guint length, gboolean to_the_end) -{ - dfilter_node *node; - GNode *gnode; - - node = g_mem_chunk_alloc(global_df->node_memchunk); - node->ntype = variable; - node->elem_size = sizeof(GByteArray*); - node->fill_array_variable_func = fill_array_bytes_variable; - node->fill_array_value_func = NULL; - node->check_relation_func = check_relation_bytes; - node->value.variable = id; - node->offset = offset; - node->length = length; - node->to_the_end = to_the_end; - gnode = g_node_new(node); - - return gnode; -} - -/* Gets length of variable represented by node from proto_register */ -static gint -dfilter_get_bytes_variable_field_registered_length(GNode *gnode) -{ - dfilter_node *node = gnode->data; - - /* Is this really a bytes_variable? */ - g_assert(node->fill_array_variable_func == fill_array_bytes_variable); - - return proto_registrar_get_length(node->value.variable); -} - -/* Sets the length of a bytes_variable node */ -static void -dfilter_set_bytes_variable_length(GNode *gnode, guint length) -{ - dfilter_node *node = gnode->data; - - /* Is this really a bytes_variable? */ - g_assert(node->fill_array_variable_func == fill_array_bytes_variable); - - node->length = length; -} - -/* Gets the length of a bytes_variable node */ -static guint -dfilter_get_bytes_variable_length(GNode *gnode) -{ - dfilter_node *node = gnode->data; - - /* Is this really a bytes_variable? */ - g_assert(node->fill_array_variable_func == fill_array_bytes_variable); - - return node->length; -} - -/* Gets the offset of a bytes_variable node */ -static guint -dfilter_get_bytes_variable_offset(GNode *gnode) -{ - dfilter_node *node = gnode->data; - - /* Is this really a bytes_variable? */ - g_assert(node->fill_array_variable_func == fill_array_bytes_variable); - - return node->offset; -} - -static char* -dfilter_get_variable_abbrev(GNode *gnode) -{ - dfilter_node *node = gnode->data; - - return proto_registrar_get_abbrev(node->value.variable); -} - -static GNode* -dfilter_mknode_numeric_value(guint32 val) -{ - dfilter_node *node; - GNode *gnode; - - node = g_mem_chunk_alloc(global_df->node_memchunk); - node->ntype = numeric; - node->elem_size = sizeof(guint32); - node->fill_array_variable_func = NULL; - node->fill_array_value_func = fill_array_numeric_value; - node->check_relation_func = check_relation_numeric; - node->value.numeric = val; - gnode = g_node_new(node); - - return gnode; -} - -static GNode* -dfilter_mknode_floating_value(double val) -{ - dfilter_node *node; - GNode *gnode; - - node = g_mem_chunk_alloc(global_df->node_memchunk); - node->ntype = floating; - node->elem_size = sizeof(double); - node->fill_array_variable_func = NULL; - node->fill_array_value_func = fill_array_floating_value; - node->check_relation_func = check_relation_floating; - node->value.floating = val; - gnode = g_node_new(node); - - return gnode; -} - -/* Returns NULL on bad parse of ETHER value */ -static GNode* -dfilter_mknode_ether_value(gchar *byte_string) -{ - dfilter_node *node; - GNode *gnode; - - node = g_mem_chunk_alloc(global_df->node_memchunk); - node->ntype = ether; - node->elem_size = sizeof(guint8) * 6; - node->fill_array_variable_func = NULL; - node->fill_array_value_func = fill_array_ether_value; - node->check_relation_func = check_relation_ether; - - if (!ether_str_to_guint8_array(byte_string, &node->value.ether[0])) { - /* Rather than free the mem_chunk allocation, let it - * stay. It will be cleaned up when "dfilter_compile()" - * calls "dfilter_destroy()". */ - dfilter_fail("\"%s\" is not a valid hardware address.", - byte_string); - return NULL; - } - - gnode = g_node_new(node); - return gnode; -} - -static GNode* -dfilter_mknode_ipxnet_value(guint32 ipx_net_val) -{ - dfilter_node *node; - GNode *gnode; - - node = g_mem_chunk_alloc(global_df->node_memchunk); - node->ntype = ipxnet; - node->elem_size = sizeof(guint8) * 4; - node->fill_array_variable_func = NULL; - node->fill_array_value_func = fill_array_numeric_value; /* cheating ! */ - node->check_relation_func = check_relation_numeric; /* cheating ! */ - node->value.numeric = ipx_net_val; - gnode = g_node_new(node); - - return gnode; -} - -/* Returns NULL on bad parse of IP value */ -static GNode* -dfilter_mknode_ipv4_value(char *host, int nmask_bits) -{ - dfilter_node *node; - GNode *gnode; - guint32 addr; - - node = g_mem_chunk_alloc(global_df->node_memchunk); - node->ntype = numeric; - node->elem_size = sizeof(ipv4_addr); - node->fill_array_variable_func = NULL; - node->fill_array_value_func = fill_array_ipv4_value; - node->check_relation_func = check_relation_ipv4; - if (!get_host_ipaddr(host, &addr)) { - /* Rather than free the mem_chunk allocation, let it - * stay. It will be cleaned up when "dfilter_compile()" - * calls "dfilter_destroy()". */ - dfilter_fail("\"%s\" isn't a valid host name or IP address.", - host); - return NULL; - } - ipv4_addr_set_host_order_addr(&node->value.ipv4, addr); - ipv4_addr_set_netmask_bits(&node->value.ipv4, nmask_bits); - - gnode = g_node_new(node); - return gnode; -} - -/* Returns NULL on bad parse of IPv6 value */ -static GNode* -dfilter_mknode_ipv6_value(char *host) -{ - dfilter_node *node; - GNode *gnode; - - node = g_mem_chunk_alloc(global_df->node_memchunk); - node->ntype = ipv6; - node->elem_size = 16; - node->fill_array_variable_func = NULL; - node->fill_array_value_func = fill_array_ipv6_value; - node->check_relation_func = check_relation_ipv6; - - if (!get_host_ipaddr6(host, (struct e_in6_addr*)&node->value.ipv6[0])) { - /* Rather than free the mem_chunk allocation, let it - * stay. It will be cleaned up when "dfilter_compile()" - * calls "dfilter_destroy()". */ - dfilter_fail("\"%s\" isn't a valid IPv6 address.", - host); - return NULL; - } - - gnode = g_node_new(node); - return gnode; -} - - -static GNode* -dfilter_mknode_string_value(char *s) -{ - dfilter_node *node; - GNode *gnode; - - node = g_mem_chunk_alloc(global_df->node_memchunk); - node->ntype = string; - node->elem_size = sizeof(char*); - node->fill_array_variable_func = NULL; - node->fill_array_value_func = fill_array_string_value; - node->check_relation_func = check_relation_string; - node->value.string = g_strdup(s); - global_df->list_of_strings = g_slist_append(global_df->list_of_strings, - node->value.string); - gnode = g_node_new(node); - - return gnode; -} - - -static GNode* -dfilter_mknode_bytes_value(GByteArray *barray) -{ - dfilter_node *node; - GNode *gnode; - - node = g_mem_chunk_alloc(global_df->node_memchunk); - node->ntype = bytes; - node->elem_size = sizeof(GByteArray*); - node->fill_array_variable_func = NULL; - node->fill_array_value_func = fill_array_bytes_value; - node->check_relation_func = check_relation_bytes; - node->value.bytes = barray; - node->offset = G_MAXINT; - node->length = barray->len; - gnode = g_node_new(node); - - return gnode; -} - -/* Given a node representing a bytes_value, returns - * the length of the byte array */ -static guint -dfilter_get_bytes_value_length(GNode* gnode) -{ - dfilter_node *node = gnode->data; - - g_assert(node->ntype == bytes); - return node->length; -} - -static guint32 -string_to_guint32(char *s, gboolean *success) -{ - char *endptr; - guint32 val; - - val = strtoul(s, &endptr, 0); - *success = TRUE; - if (endptr == s || *endptr != '\0') { - /* This isn't a valid number. */ - dfilter_fail("\"%s\" is not a valid number.", s); - *success = FALSE; - } - if (errno == ERANGE) { - *success = FALSE; - if (val == ULONG_MAX) { - dfilter_fail("\"%s\" causes an integer overflow.", s); - } - else { - dfilter_fail("\"%s\" is not an integer.", s); - } - } - - return (guint32)val; -} - -static double -string_to_double(char *s, gboolean *success) -{ - char *endptr = NULL; - double retval; - - retval = strtod(s, &endptr); - *success = TRUE; - - if (endptr == s) { - dfilter_fail("\"%s\" is not a valid floating-point number.", s); - *success = FALSE; - } - - if (errno == ERANGE) { - *success = FALSE; - if (retval == 0) { - dfilter_fail("\"%s\" causes a floating-point underflow.", s); - } - else if (retval == HUGE_VAL) { - dfilter_fail("\"%s\" causes a floating-point overflow.", s); - } - else { - dfilter_fail("\"%s\" is not a valid floating-point.", s); - } - } - return retval; -} - -static GNode* -dfilter_mknode_existence(gint id) -{ - dfilter_node *node; - GNode *gnode; - - node = g_mem_chunk_alloc(global_df->node_memchunk); - node->ntype = existence; - node->elem_size = sizeof(guint32); - node->fill_array_variable_func = NULL; - node->fill_array_value_func = NULL; - node->check_relation_func = NULL; - node->value.variable = id; - gnode = g_node_new(node); - - return gnode; -} - - -/* converts a string representing an ether HW address - * to a guint8 array. - * - * Returns 0 on failure, 1 on success. - */ -static int -ether_str_to_guint8_array(const char *s, guint8 *mac) -{ - char ether_str[18]; /* 2+1+2+1+2+1+2+1+2+1+2 + 1 */ - char *p, *str; - int i = 0; - - if (strlen(s) > 17) { - return 0; - } - strcpy(ether_str, s); /* local copy of string */ - str = ether_str; - while ((p = strtok(str, "-:."))) { - /* catch short strings with too many hex bytes: 0.0.0.0.0.0.0 */ - if (i > 5) { - return 0; - } - mac[i] = (guint8) strtoul(p, NULL, 16); - i++; - /* subsequent calls to strtok() require NULL as arg 1 */ - str = NULL; - } - if (i != 6) - return 0; /* failed to read 6 hex pairs */ - else - return 1; /* read exactly 6 hex pairs */ -} - - -static int -check_bytes_variable_sanity(GNode *gnode) -{ - int a_off, a_len, reg_len, t_off; - - a_off = dfilter_get_bytes_variable_offset(gnode); - a_len = dfilter_get_bytes_variable_length(gnode); - reg_len = dfilter_get_bytes_variable_field_registered_length(gnode); - - if (reg_len > 0) { - t_off = a_off >= 0 ? a_off : reg_len + a_off; - if (t_off + a_len > reg_len) { - dfilter_fail("The \"%s\" field is only %u byte%s wide, but " - "%u byte%s %s supplied.", - dfilter_get_variable_abbrev(gnode), - reg_len, plurality(reg_len, "", "s"), - a_len, plurality(a_len, "", "s"), - plurality(a_len, "was", "were")); - return 0; - } - } - return 1; -} |