forked from osmocom/wireshark
758 lines
16 KiB
C
758 lines
16 KiB
C
/*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 2001 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include "ftypes-int.h"
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#include <wsutil/ws_assert.h>
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/* Keep track of ftype_t's via their ftenum number */
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static ftype_t* type_list[FT_NUM_TYPES];
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/* Initialize the ftype module. */
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void
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ftypes_initialize(void)
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{
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ftype_register_bytes();
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ftype_register_double();
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ftype_register_ieee_11073_float();
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ftype_register_integers();
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ftype_register_ipv4();
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ftype_register_ipv6();
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ftype_register_guid();
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ftype_register_none();
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ftype_register_string();
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ftype_register_time();
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ftype_register_tvbuff();
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}
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/* Each ftype_t is registered via this function */
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void
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ftype_register(enum ftenum ftype, ftype_t *ft)
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{
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/* Check input */
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ws_assert(ftype < FT_NUM_TYPES);
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ws_assert(ftype == ft->ftype);
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/* Don't re-register. */
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ws_assert(type_list[ftype] == NULL);
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type_list[ftype] = ft;
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}
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/* Given an ftenum number, return an ftype_t* */
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#define FTYPE_LOOKUP(ftype, result) \
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/* Check input */ \
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ws_assert(ftype < FT_NUM_TYPES); \
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result = type_list[ftype];
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/* from README.dissector:
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Note that the formats used must all belong to the same list as defined below:
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- FT_INT8, FT_INT16, FT_INT24 and FT_INT32
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- FT_UINT8, FT_UINT16, FT_UINT24, FT_UINT32, FT_IPXNET and FT_FRAMENUM
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- FT_UINT64 and FT_EUI64
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- FT_STRING, FT_STRINGZ and FT_UINT_STRING
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- FT_FLOAT and FT_DOUBLE
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- FT_BYTES, FT_UINT_BYTES, FT_AX25, FT_ETHER, FT_VINES, FT_OID and FT_REL_OID
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- FT_ABSOLUTE_TIME and FT_RELATIVE_TIME
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*/
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static enum ftenum
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same_ftype(const enum ftenum ftype)
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{
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switch (ftype) {
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case FT_INT8:
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case FT_INT16:
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case FT_INT24:
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case FT_INT32:
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return FT_INT32;
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case FT_UINT8:
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case FT_UINT16:
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case FT_UINT24:
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case FT_UINT32:
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return FT_UINT32;
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case FT_INT40:
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case FT_INT48:
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case FT_INT56:
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case FT_INT64:
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return FT_INT64;
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case FT_UINT40:
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case FT_UINT48:
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case FT_UINT56:
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case FT_UINT64:
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return FT_UINT64;
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case FT_STRING:
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case FT_STRINGZ:
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case FT_UINT_STRING:
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return FT_STRING;
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case FT_FLOAT:
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case FT_DOUBLE:
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return FT_DOUBLE;
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case FT_BYTES:
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case FT_UINT_BYTES:
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return FT_BYTES;
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case FT_OID:
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case FT_REL_OID:
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return FT_OID;
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/* XXX: the folowing are unique for now */
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case FT_IPv4:
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case FT_IPv6:
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/* everything else is unique */
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default:
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return ftype;
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}
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}
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/* given two types, are they similar - for example can two
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* duplicate fields be registered of these two types. */
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gboolean
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ftype_similar_types(const enum ftenum ftype_a, const enum ftenum ftype_b)
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{
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return (same_ftype(ftype_a) == same_ftype(ftype_b));
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}
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/* Returns a string representing the name of the type. Useful
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* for glossary production. */
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const char*
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ftype_name(enum ftenum ftype)
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{
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ftype_t *ft;
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FTYPE_LOOKUP(ftype, ft);
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return ft->name;
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}
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const char*
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ftype_pretty_name(enum ftenum ftype)
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{
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ftype_t *ft;
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FTYPE_LOOKUP(ftype, ft);
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return ft->pretty_name;
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}
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int
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ftype_length(enum ftenum ftype)
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{
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ftype_t *ft;
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FTYPE_LOOKUP(ftype, ft);
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return ft->wire_size;
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}
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gboolean
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ftype_can_slice(enum ftenum ftype)
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{
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ftype_t *ft;
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FTYPE_LOOKUP(ftype, ft);
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return ft->slice ? TRUE : FALSE;
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}
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gboolean
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ftype_can_eq(enum ftenum ftype)
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{
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ftype_t *ft;
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FTYPE_LOOKUP(ftype, ft);
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return ft->cmp_order != NULL;
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}
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gboolean
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ftype_can_cmp(enum ftenum ftype)
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{
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ftype_t *ft;
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FTYPE_LOOKUP(ftype, ft);
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return ft->cmp_order != NULL;
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}
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gboolean
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ftype_can_bitwise_and(enum ftenum ftype)
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{
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ftype_t *ft;
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FTYPE_LOOKUP(ftype, ft);
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return ft->cmp_bitwise_and ? TRUE : FALSE;
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}
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gboolean
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ftype_can_contains(enum ftenum ftype)
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{
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ftype_t *ft;
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FTYPE_LOOKUP(ftype, ft);
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return ft->cmp_contains ? TRUE : FALSE;
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}
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gboolean
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ftype_can_matches(enum ftenum ftype)
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{
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ftype_t *ft;
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FTYPE_LOOKUP(ftype, ft);
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return ft->cmp_matches ? TRUE : FALSE;
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}
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/* ---------------------------------------------------------- */
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/* Allocate and initialize an fvalue_t, given an ftype */
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fvalue_t*
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fvalue_new(ftenum_t ftype)
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{
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fvalue_t *fv;
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ftype_t *ft;
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FvalueNewFunc new_value;
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fv = g_slice_new(fvalue_t);
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FTYPE_LOOKUP(ftype, ft);
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fv->ftype = ft;
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new_value = ft->new_value;
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if (new_value) {
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new_value(fv);
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}
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return fv;
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}
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void
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fvalue_init(fvalue_t *fv, ftenum_t ftype)
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{
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ftype_t *ft;
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FvalueNewFunc new_value;
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FTYPE_LOOKUP(ftype, ft);
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fv->ftype = ft;
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new_value = ft->new_value;
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if (new_value) {
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new_value(fv);
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}
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}
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void
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fvalue_cleanup(fvalue_t *fv)
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{
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if (!fv->ftype->free_value)
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return;
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fv->ftype->free_value(fv);
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}
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void
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fvalue_free(fvalue_t *fv)
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{
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fvalue_cleanup(fv);
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g_slice_free(fvalue_t, fv);
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}
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fvalue_t*
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fvalue_from_unparsed(ftenum_t ftype, const char *s, gboolean allow_partial_value, gchar **err_msg)
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{
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fvalue_t *fv;
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fv = fvalue_new(ftype);
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if (fv->ftype->val_from_unparsed) {
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if (fv->ftype->val_from_unparsed(fv, s, allow_partial_value, err_msg)) {
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/* Success */
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if (err_msg != NULL)
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*err_msg = NULL;
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return fv;
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}
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}
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else {
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if (err_msg != NULL) {
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*err_msg = ws_strdup_printf("\"%s\" cannot be converted to %s.",
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s, ftype_pretty_name(ftype));
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}
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}
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fvalue_free(fv);
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return NULL;
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}
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fvalue_t*
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fvalue_from_string(ftenum_t ftype, const char *s, gchar **err_msg)
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{
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fvalue_t *fv;
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fv = fvalue_new(ftype);
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if (fv->ftype->val_from_string) {
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if (fv->ftype->val_from_string(fv, s, err_msg)) {
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/* Success */
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if (err_msg != NULL)
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*err_msg = NULL;
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return fv;
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}
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}
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else {
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if (err_msg != NULL) {
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*err_msg = ws_strdup_printf("\"%s\" cannot be converted to %s.",
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s, ftype_pretty_name(ftype));
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}
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}
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fvalue_free(fv);
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return NULL;
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}
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fvalue_t*
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fvalue_from_charconst(ftenum_t ftype, unsigned long num, gchar **err_msg)
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{
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fvalue_t *fv;
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fv = fvalue_new(ftype);
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if (fv->ftype->val_from_charconst) {
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if (fv->ftype->val_from_charconst(fv, num, err_msg)) {
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/* Success */
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if (err_msg != NULL)
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*err_msg = NULL;
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return fv;
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}
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}
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else {
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if (err_msg != NULL) {
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if (num <= 0x7f && g_ascii_isprint(num)) {
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*err_msg = ws_strdup_printf("Character constant '%c' (0x%lx) cannot be converted to %s.",
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(int)num, num, ftype_pretty_name(ftype));
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}
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else {
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*err_msg = ws_strdup_printf("Character constant 0x%lx cannot be converted to %s.",
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num, ftype_pretty_name(ftype));
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}
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}
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}
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fvalue_free(fv);
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return NULL;
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}
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ftenum_t
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fvalue_type_ftenum(fvalue_t *fv)
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{
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return fv->ftype->ftype;
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}
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const char*
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fvalue_type_name(const fvalue_t *fv)
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{
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return fv->ftype->name;
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}
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guint
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fvalue_length(fvalue_t *fv)
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{
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if (fv->ftype->len)
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return fv->ftype->len(fv);
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else
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return fv->ftype->wire_size;
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}
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char *
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fvalue_to_string_repr(wmem_allocator_t *scope, const fvalue_t *fv, ftrepr_t rtype, int field_display)
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{
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if (fv->ftype->val_to_string_repr == NULL) {
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/* no value-to-string-representation function, so the value cannot be represented */
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return NULL;
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}
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return fv->ftype->val_to_string_repr(scope, fv, rtype, field_display);
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}
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typedef struct {
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fvalue_t *fv;
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GByteArray *bytes;
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gboolean slice_failure;
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} slice_data_t;
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static void
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slice_func(gpointer data, gpointer user_data)
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{
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drange_node *drnode = (drange_node *)data;
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slice_data_t *slice_data = (slice_data_t *)user_data;
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gint start_offset;
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gint length = 0;
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gint end_offset = 0;
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guint field_length;
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fvalue_t *fv;
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drange_node_end_t ending;
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if (slice_data->slice_failure) {
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return;
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}
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start_offset = drange_node_get_start_offset(drnode);
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ending = drange_node_get_ending(drnode);
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fv = slice_data->fv;
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field_length = fvalue_length(fv);
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/* Check for negative start */
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if (start_offset < 0) {
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start_offset = field_length + start_offset;
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if (start_offset < 0) {
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slice_data->slice_failure = TRUE;
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return;
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}
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}
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/* Check the end type and set the length */
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if (ending == DRANGE_NODE_END_T_TO_THE_END) {
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length = field_length - start_offset;
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if (length <= 0) {
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slice_data->slice_failure = TRUE;
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return;
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}
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}
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else if (ending == DRANGE_NODE_END_T_LENGTH) {
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length = drange_node_get_length(drnode);
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if (start_offset + length > (int) field_length) {
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slice_data->slice_failure = TRUE;
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return;
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}
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}
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else if (ending == DRANGE_NODE_END_T_OFFSET) {
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end_offset = drange_node_get_end_offset(drnode);
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if (end_offset < 0) {
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end_offset = field_length + end_offset;
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if (end_offset < start_offset) {
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slice_data->slice_failure = TRUE;
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return;
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}
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} else if (end_offset >= (int) field_length) {
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slice_data->slice_failure = TRUE;
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return;
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}
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length = end_offset - start_offset + 1;
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}
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else {
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ws_assert_not_reached();
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}
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ws_assert(start_offset >=0 && length > 0);
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fv->ftype->slice(fv, slice_data->bytes, start_offset, length);
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}
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/* Returns a new FT_BYTES fvalue_t* if possible, otherwise NULL */
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fvalue_t*
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fvalue_slice(fvalue_t *fv, drange_t *d_range)
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{
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slice_data_t slice_data;
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fvalue_t *new_fv;
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slice_data.fv = fv;
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slice_data.bytes = g_byte_array_new();
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slice_data.slice_failure = FALSE;
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/* XXX - We could make some optimizations here based on
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* drange_has_total_length() and
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* drange_get_max_offset().
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*/
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drange_foreach_drange_node(d_range, slice_func, &slice_data);
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new_fv = fvalue_new(FT_BYTES);
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fvalue_set_byte_array(new_fv, slice_data.bytes);
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return new_fv;
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}
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void
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fvalue_set_byte_array(fvalue_t *fv, GByteArray *value)
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{
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ws_assert(fv->ftype->ftype == FT_BYTES ||
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fv->ftype->ftype == FT_UINT_BYTES ||
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fv->ftype->ftype == FT_OID ||
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fv->ftype->ftype == FT_REL_OID ||
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fv->ftype->ftype == FT_SYSTEM_ID);
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ws_assert(fv->ftype->set_value.set_value_byte_array);
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fv->ftype->set_value.set_value_byte_array(fv, value);
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}
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void
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fvalue_set_bytes(fvalue_t *fv, const guint8 *value)
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{
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ws_assert(fv->ftype->ftype == FT_AX25 ||
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fv->ftype->ftype == FT_VINES ||
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fv->ftype->ftype == FT_ETHER ||
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fv->ftype->ftype == FT_FCWWN ||
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fv->ftype->ftype == FT_IPv6);
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ws_assert(fv->ftype->set_value.set_value_bytes);
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fv->ftype->set_value.set_value_bytes(fv, value);
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}
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void
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fvalue_set_guid(fvalue_t *fv, const e_guid_t *value)
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{
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ws_assert(fv->ftype->ftype == FT_GUID);
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ws_assert(fv->ftype->set_value.set_value_guid);
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fv->ftype->set_value.set_value_guid(fv, value);
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}
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void
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fvalue_set_time(fvalue_t *fv, const nstime_t *value)
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{
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ws_assert(IS_FT_TIME(fv->ftype->ftype));
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ws_assert(fv->ftype->set_value.set_value_time);
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fv->ftype->set_value.set_value_time(fv, value);
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}
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void
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fvalue_set_string(fvalue_t *fv, const gchar *value)
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{
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ws_assert(IS_FT_STRING(fv->ftype->ftype) ||
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fv->ftype->ftype == FT_UINT_STRING);
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ws_assert(fv->ftype->set_value.set_value_string);
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fv->ftype->set_value.set_value_string(fv, value);
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}
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void
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fvalue_set_protocol(fvalue_t *fv, tvbuff_t *value, const gchar *name)
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{
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ws_assert(fv->ftype->ftype == FT_PROTOCOL);
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ws_assert(fv->ftype->set_value.set_value_protocol);
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fv->ftype->set_value.set_value_protocol(fv, value, name);
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}
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void
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fvalue_set_uinteger(fvalue_t *fv, guint32 value)
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{
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ws_assert(fv->ftype->ftype == FT_IEEE_11073_SFLOAT ||
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fv->ftype->ftype == FT_IEEE_11073_FLOAT ||
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fv->ftype->ftype == FT_CHAR ||
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fv->ftype->ftype == FT_UINT8 ||
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fv->ftype->ftype == FT_UINT16 ||
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fv->ftype->ftype == FT_UINT24 ||
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fv->ftype->ftype == FT_UINT32 ||
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fv->ftype->ftype == FT_IPXNET ||
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fv->ftype->ftype == FT_FRAMENUM ||
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fv->ftype->ftype == FT_IPv4);
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ws_assert(fv->ftype->set_value.set_value_uinteger);
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fv->ftype->set_value.set_value_uinteger(fv, value);
|
|
}
|
|
|
|
void
|
|
fvalue_set_sinteger(fvalue_t *fv, gint32 value)
|
|
{
|
|
ws_assert(fv->ftype->ftype == FT_INT8 ||
|
|
fv->ftype->ftype == FT_INT16 ||
|
|
fv->ftype->ftype == FT_INT24 ||
|
|
fv->ftype->ftype == FT_INT32);
|
|
ws_assert(fv->ftype->set_value.set_value_sinteger);
|
|
fv->ftype->set_value.set_value_sinteger(fv, value);
|
|
}
|
|
|
|
void
|
|
fvalue_set_uinteger64(fvalue_t *fv, guint64 value)
|
|
{
|
|
ws_assert(fv->ftype->ftype == FT_UINT40 ||
|
|
fv->ftype->ftype == FT_UINT48 ||
|
|
fv->ftype->ftype == FT_UINT56 ||
|
|
fv->ftype->ftype == FT_UINT64 ||
|
|
fv->ftype->ftype == FT_BOOLEAN ||
|
|
fv->ftype->ftype == FT_EUI64);
|
|
ws_assert(fv->ftype->set_value.set_value_uinteger64);
|
|
fv->ftype->set_value.set_value_uinteger64(fv, value);
|
|
}
|
|
|
|
void
|
|
fvalue_set_sinteger64(fvalue_t *fv, gint64 value)
|
|
{
|
|
ws_assert(fv->ftype->ftype == FT_INT40 ||
|
|
fv->ftype->ftype == FT_INT48 ||
|
|
fv->ftype->ftype == FT_INT56 ||
|
|
fv->ftype->ftype == FT_INT64);
|
|
ws_assert(fv->ftype->set_value.set_value_sinteger64);
|
|
fv->ftype->set_value.set_value_sinteger64(fv, value);
|
|
}
|
|
|
|
void
|
|
fvalue_set_floating(fvalue_t *fv, gdouble value)
|
|
{
|
|
ws_assert(fv->ftype->ftype == FT_FLOAT ||
|
|
fv->ftype->ftype == FT_DOUBLE);
|
|
ws_assert(fv->ftype->set_value.set_value_floating);
|
|
fv->ftype->set_value.set_value_floating(fv, value);
|
|
}
|
|
|
|
|
|
gpointer
|
|
fvalue_get(fvalue_t *fv)
|
|
{
|
|
ws_assert(fv->ftype->ftype == FT_BYTES ||
|
|
fv->ftype->ftype == FT_UINT_BYTES ||
|
|
fv->ftype->ftype == FT_AX25 ||
|
|
fv->ftype->ftype == FT_VINES ||
|
|
fv->ftype->ftype == FT_ETHER ||
|
|
fv->ftype->ftype == FT_OID ||
|
|
fv->ftype->ftype == FT_REL_OID ||
|
|
fv->ftype->ftype == FT_SYSTEM_ID ||
|
|
fv->ftype->ftype == FT_FCWWN ||
|
|
fv->ftype->ftype == FT_GUID ||
|
|
fv->ftype->ftype == FT_IPv6 ||
|
|
fv->ftype->ftype == FT_PROTOCOL ||
|
|
IS_FT_STRING(fv->ftype->ftype) ||
|
|
fv->ftype->ftype == FT_UINT_STRING ||
|
|
IS_FT_TIME(fv->ftype->ftype));
|
|
ws_assert(fv->ftype->get_value.get_value_ptr);
|
|
return fv->ftype->get_value.get_value_ptr(fv);
|
|
}
|
|
|
|
guint32
|
|
fvalue_get_uinteger(fvalue_t *fv)
|
|
{
|
|
ws_assert(fv->ftype->ftype == FT_IEEE_11073_SFLOAT ||
|
|
fv->ftype->ftype == FT_IEEE_11073_FLOAT ||
|
|
fv->ftype->ftype == FT_CHAR ||
|
|
fv->ftype->ftype == FT_UINT8 ||
|
|
fv->ftype->ftype == FT_UINT16 ||
|
|
fv->ftype->ftype == FT_UINT24 ||
|
|
fv->ftype->ftype == FT_UINT32 ||
|
|
fv->ftype->ftype == FT_IPXNET ||
|
|
fv->ftype->ftype == FT_FRAMENUM ||
|
|
fv->ftype->ftype == FT_IPv4);
|
|
ws_assert(fv->ftype->get_value.get_value_uinteger);
|
|
return fv->ftype->get_value.get_value_uinteger(fv);
|
|
}
|
|
|
|
gint32
|
|
fvalue_get_sinteger(fvalue_t *fv)
|
|
{
|
|
ws_assert(fv->ftype->ftype == FT_INT8 ||
|
|
fv->ftype->ftype == FT_INT16 ||
|
|
fv->ftype->ftype == FT_INT24 ||
|
|
fv->ftype->ftype == FT_INT32);
|
|
ws_assert(fv->ftype->get_value.get_value_sinteger);
|
|
return fv->ftype->get_value.get_value_sinteger(fv);
|
|
}
|
|
|
|
guint64
|
|
fvalue_get_uinteger64(fvalue_t *fv)
|
|
{
|
|
ws_assert(fv->ftype->ftype == FT_UINT40 ||
|
|
fv->ftype->ftype == FT_UINT48 ||
|
|
fv->ftype->ftype == FT_UINT56 ||
|
|
fv->ftype->ftype == FT_UINT64 ||
|
|
fv->ftype->ftype == FT_BOOLEAN ||
|
|
fv->ftype->ftype == FT_EUI64);
|
|
ws_assert(fv->ftype->get_value.get_value_uinteger64);
|
|
return fv->ftype->get_value.get_value_uinteger64(fv);
|
|
}
|
|
|
|
gint64
|
|
fvalue_get_sinteger64(fvalue_t *fv)
|
|
{
|
|
ws_assert(fv->ftype->ftype == FT_INT40 ||
|
|
fv->ftype->ftype == FT_INT48 ||
|
|
fv->ftype->ftype == FT_INT56 ||
|
|
fv->ftype->ftype == FT_INT64);
|
|
ws_assert(fv->ftype->get_value.get_value_sinteger64);
|
|
return fv->ftype->get_value.get_value_sinteger64(fv);
|
|
}
|
|
|
|
double
|
|
fvalue_get_floating(fvalue_t *fv)
|
|
{
|
|
ws_assert(fv->ftype->ftype == FT_FLOAT ||
|
|
fv->ftype->ftype == FT_DOUBLE);
|
|
ws_assert(fv->ftype->get_value.get_value_floating);
|
|
return fv->ftype->get_value.get_value_floating(fv);
|
|
}
|
|
|
|
static inline int
|
|
_fvalue_cmp(const fvalue_t *a, const fvalue_t *b)
|
|
{
|
|
/* XXX - check compatibility of a and b */
|
|
ws_assert(a->ftype->cmp_order);
|
|
return a->ftype->cmp_order(a, b);
|
|
}
|
|
|
|
gboolean
|
|
fvalue_eq(const fvalue_t *a, const fvalue_t *b)
|
|
{
|
|
return _fvalue_cmp(a, b) == 0;
|
|
}
|
|
|
|
gboolean
|
|
fvalue_ne(const fvalue_t *a, const fvalue_t *b)
|
|
{
|
|
return _fvalue_cmp(a, b) != 0;
|
|
}
|
|
|
|
gboolean
|
|
fvalue_gt(const fvalue_t *a, const fvalue_t *b)
|
|
{
|
|
return _fvalue_cmp(a, b) > 0;
|
|
}
|
|
|
|
gboolean
|
|
fvalue_ge(const fvalue_t *a, const fvalue_t *b)
|
|
{
|
|
return _fvalue_cmp(a, b) >= 0;
|
|
}
|
|
|
|
gboolean
|
|
fvalue_lt(const fvalue_t *a, const fvalue_t *b)
|
|
{
|
|
return _fvalue_cmp(a, b) < 0;
|
|
}
|
|
|
|
gboolean
|
|
fvalue_le(const fvalue_t *a, const fvalue_t *b)
|
|
{
|
|
return _fvalue_cmp(a, b) <= 0;
|
|
}
|
|
|
|
gboolean
|
|
fvalue_bitwise_and(const fvalue_t *a, const fvalue_t *b)
|
|
{
|
|
/* XXX - check compatibility of a and b */
|
|
ws_assert(a->ftype->cmp_bitwise_and);
|
|
return a->ftype->cmp_bitwise_and(a, b);
|
|
}
|
|
|
|
gboolean
|
|
fvalue_contains(const fvalue_t *a, const fvalue_t *b)
|
|
{
|
|
/* XXX - check compatibility of a and b */
|
|
ws_assert(a->ftype->cmp_contains);
|
|
return a->ftype->cmp_contains(a, b);
|
|
}
|
|
|
|
gboolean
|
|
fvalue_matches(const fvalue_t *a, const ws_regex_t *re)
|
|
{
|
|
ws_assert(a->ftype->cmp_matches);
|
|
return a->ftype->cmp_matches(a, re);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - https://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:
|
|
*/
|