3 * Wireshark - Network traffic analyzer
4 * By Gerald Combs <gerald@wireshark.org>
5 * Copyright 2001 Gerald Combs
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 #ifndef WTAP_OPT_TYPES_H
23 #define WTAP_OPT_TYPES_H
25 #include "ws_symbol_export.h"
29 #endif /* __cplusplus */
32 * We use the pcapng option codes for option type values.
34 #define OPT_EOFOPT 0x0000 /**< Appears in pcapng files, but not in option blocks. */
35 #define OPT_COMMENT 0x0001 /**< NULL if not available */
37 /* Section Header block (SHB) */
38 #define OPT_SHB_HARDWARE 0x0002 /**< NULL if not available
39 * UTF-8 string containing the description of the
40 * hardware used to create this section.
42 #define OPT_SHB_OS 0x0003 /**< NULL if not available, UTF-8 string containing the
43 * name of the operating system used to create this section.
45 #define OPT_SHB_USERAPPL 0x0004 /**< NULL if not available, UTF-8 string containing the
46 * name of the application used to create this section.
49 /* Interface Description block (IDB) */
50 #define OPT_IDB_NAME 0x0002 /**< NULL if not available, A UTF-8 string containing the name
51 * of the device used to capture data.
52 * "eth0" / "\Device\NPF_{AD1CE675-96D0-47C5-ADD0-2504B9126B68}"
54 #define OPT_IDB_DESCR 0x0003 /**< NULL if not available, A UTF-8 string containing the description
55 * of the device used to capture data.
56 * "Broadcom NetXtreme" / "First Ethernet Interface"
58 #define OPT_IDB_IP4ADDR 0x0004 /**< XXX: if_IPv4addr Interface network address and netmask.
59 * This option can be repeated multiple times within the same Interface Description Block
60 * when multiple IPv4 addresses are assigned to the interface.
61 * 192 168 1 1 255 255 255 0
63 #define OPT_IDB_IP6ADDR 0x0005 /* XXX: if_IPv6addr Interface network address and prefix length (stored in the last byte).
64 * This option can be repeated multiple times within the same Interface
65 * Description Block when multiple IPv6 addresses are assigned to the interface.
66 * 2001:0db8:85a3:08d3:1319:8a2e:0370:7344/64 is written (in hex) as
67 * "20 01 0d b8 85 a3 08 d3 13 19 8a 2e 03 70 73 44 40"*/
68 #define OPT_IDB_MACADDR 0x0006 /* XXX: if_MACaddr Interface Hardware MAC address (48 bits). */
69 #define OPT_IDB_EUIADDR 0x0007 /* XXX: if_EUIaddr Interface Hardware EUI address (64 bits) */
70 #define OPT_IDB_SPEED 0x0008 /**< 0xFFFFFFFF if unknown
71 * Interface speed (in bps). 100000000 for 100Mbps
73 #define OPT_IDB_TSRESOL 0x0009 /**< Resolution of timestamps. If the Most Significant Bit is equal to zero,
74 * the remaining bits indicates the resolution of the timestamp as as a
75 * negative power of 10 (e.g. 6 means microsecond resolution, timestamps
76 * are the number of microseconds since 1/1/1970). If the Most Significant Bit
77 * is equal to one, the remaining bits indicates the resolution has a
78 * negative power of 2 (e.g. 10 means 1/1024 of second).
79 * If this option is not present, a resolution of 10^-6 is assumed
80 * (i.e. timestamps have the same resolution of the standard 'libpcap' timestamps).
82 #define OPT_IDB_TZONE 0x000A /* XXX: if_tzone Time zone for GMT support (TODO: specify better). */
83 #define OPT_IDB_FILTER 0x000B /**< The filter (e.g. "capture only TCP traffic") used to capture traffic.
84 * The first byte of the Option Data keeps a code of the filter used
85 * (e.g. if this is a libpcap string, or BPF bytecode, and more).
86 * More details about this format will be presented in Appendix XXX (TODO).
87 * (TODO: better use different options for different fields?
88 * e.g. if_filter_pcap, if_filter_bpf, ...) 00 "tcp port 23 and host 10.0.0.5"
90 #define OPT_IDB_OS 0x000C /**< NULL if not available, A UTF-8 string containing the name of the operating system of the
91 * machine in which this interface is installed.
92 * This can be different from the same information that can be
93 * contained by the Section Header Block
94 * (Section 3.1 (Section Header Block (mandatory))) because
95 * the capture can have been done on a remote machine.
96 * "Windows XP SP2" / "openSUSE 10.2"
98 #define OPT_IDB_FCSLEN 0x000D /**< An integer value that specified the length of the
99 * Frame Check Sequence (in bits) for this interface.
100 * For link layers whose FCS length can change during time,
101 * the Packet Block Flags Word can be used (see Appendix A (Packet Block Flags Word))
103 #define OPT_IDB_TSOFFSET 0x000E /**< XXX: A 64 bits integer value that specifies an offset (in seconds)
104 * that must be added to the timestamp of each packet to obtain
105 * the absolute timestamp of a packet. If the option is missing,
106 * the timestamps stored in the packet must be considered absolute
107 * timestamps. The time zone of the offset can be specified with the
108 * option if_tzone. TODO: won't a if_tsoffset_low for fractional
109 * second offsets be useful for highly syncronized capture systems?
112 #define OPT_ISB_STARTTIME 0x0002
113 #define OPT_ISB_ENDTIME 0x0003
114 #define OPT_ISB_IFRECV 0x0004
115 #define OPT_ISB_IFDROP 0x0005
116 #define OPT_ISB_FILTERACCEPT 0x0006
117 #define OPT_ISB_OSDROP 0x0007
118 #define OPT_ISB_USRDELIV 0x0008
120 struct wtap_optionblock;
121 typedef struct wtap_optionblock *wtap_optionblock_t;
123 /* Currently supported option blocks */
125 WTAP_OPTION_BLOCK_IF_DESCR = 0,
126 WTAP_OPTION_BLOCK_IF_STATS,
127 WTAP_OPTION_BLOCK_NG_SECTION,
128 WTAP_OPTION_BLOCK_NG_NRB,
129 WTAP_OPTION_BLOCK_END_OF_LIST
130 } wtap_optionblock_type_t;
132 /* Currently supported option types */
141 WTAP_OPTTYPE_SUCCESS = 0,
142 WTAP_OPTTYPE_NOT_FOUND = -1,
143 WTAP_OPTTYPE_TYPE_MISMATCH = -2,
144 WTAP_OPTTYPE_ALREADY_EXISTS = -3
145 } wtap_opttype_return_val;
147 typedef void (*wtap_opttype_free_custom_func)(void* data);
149 struct wtap_opttype_custom
153 wtap_opttype_free_custom_func free_func;
160 struct wtap_opttype_custom customval;
165 typedef void (*wtap_block_create_func)(wtap_optionblock_t block);
166 typedef void (*wtap_mand_free_func)(wtap_optionblock_t block);
167 typedef void (*wtap_mand_copy_func)(wtap_optionblock_t dest_block, wtap_optionblock_t src_block);
169 typedef struct wtap_optblock_reg {
170 const char *name; /**< name of option */
171 const char *description; /**< human-readable description of option */
172 wtap_opttype_e type; /**< type of that option */
173 wtap_option_type option; /**< pointer to variable storing the value */
174 wtap_option_type default_val; /**< the default value of the option */
175 } wtap_optblock_reg_t;
177 /** Initialize option block types.
179 * This is currently just a placeholder as nothing needs to be
180 * initialized yet. Should handle "registration" when code is
181 * refactored to do so.
183 void wtap_opttypes_initialize(void);
185 /** Create an option block by type
187 * Return a newly allocated option block with default options provided
189 * @param[in] block_type Option block type to be created
190 * @return Newly allocated option block
192 WS_DLL_PUBLIC wtap_optionblock_t wtap_optionblock_create(int block_type);
194 /** Free an option block
196 * Needs to be called to clean up any allocated option block
198 * @param[in] block Block to be freed
200 WS_DLL_PUBLIC void wtap_optionblock_free(wtap_optionblock_t block);
202 /** Free an array of option blocks
204 * Needs to be called to clean up option blocks allocated
205 * through GArray (for multiple blocks of same type)
206 * Includes freeing the GArray
208 * @param[in] block_array Array of blocks to be freed
210 WS_DLL_PUBLIC void wtap_optionblock_array_free(GArray* block_array);
212 /** Provide mandatory data of an option block
214 * @param[in] block Block from which to retrieve mandatory data
215 * @return Option block mandatory data. Structure varies based on option block type
217 WS_DLL_PUBLIC void* wtap_optionblock_get_mandatory_data(wtap_optionblock_t block);
219 /** Add an option to the option block
221 * @param[in] block Block to which to add option
222 * @param[in] option_id Identifier value for option
223 * @param[in] option structure explaining it
224 * @return wtap_opttype_return_val - WTAP_OPTTYPE_SUCCESS if successful,
225 * error code otherwise
227 WS_DLL_PUBLIC wtap_opttype_return_val
228 wtap_optionblock_add_option(wtap_optionblock_t block, guint option_id, wtap_optblock_reg_t* option);
230 /** Set string option value in an option block
232 * @param[in] block Block in which to set the option value
233 * @param[in] option_id Identifier value for option
234 * @param[in] value New value of option
235 * @param[in] value_length Maximum length of string to copy.
236 * @return wtap_opttype_return_val - WTAP_OPTTYPE_SUCCESS if successful,
237 * error code otherwise
239 WS_DLL_PUBLIC wtap_opttype_return_val
240 wtap_optionblock_set_option_string(wtap_optionblock_t block, guint option_id, char* value, gsize value_length);
242 /** Set string option value in an option block to a printf-formatted string
244 * @param[in] block Block in which to set the option value
245 * @param[in] option_id Identifier value for option
246 * @param[in] format printf-like format string
247 * @return wtap_opttype_return_val - WTAP_OPTTYPE_SUCCESS if successful,
248 * error code otherwise
250 WS_DLL_PUBLIC wtap_opttype_return_val
251 wtap_optionblock_set_option_string_format(wtap_optionblock_t block, guint option_id, const char *format, ...)
254 /** Get string option value from an option block
256 * @param[in] block Block from which to get the option value
257 * @param[in] option_id Identifier value for option
258 * @param[out] value Returned value of option
259 * @return wtap_opttype_return_val - WTAP_OPTTYPE_SUCCESS if successful,
260 * error code otherwise
262 WS_DLL_PUBLIC wtap_opttype_return_val
263 wtap_optionblock_get_option_string(wtap_optionblock_t block, guint option_id, char** value);
265 /** Get array of string option values from an option block
267 * @param[in] block Block from which to get option values
268 * @param[in] option_id Identifier value for option
269 * @param[out] value Returned GArray of option values
270 * @return wtap_opttype_return_val - WTAP_OPTTYPE_SUCCESS if successful,
271 * error code otherwise
273 WS_DLL_PUBLIC wtap_opttype_return_val
274 wtap_optionblock_get_string_options(wtap_optionblock_t block, guint option_id, GArray **value);
276 /** Set UINT64 option value in an option block
278 * @param[in] block Block in which to set the option value
279 * @param[in] option_id Identifier value for option
280 * @param[in] value New value of option
281 * @return wtap_opttype_return_val - WTAP_OPTTYPE_SUCCESS if successful,
282 * error code otherwise
284 WS_DLL_PUBLIC wtap_opttype_return_val
285 wtap_optionblock_set_option_uint64(wtap_optionblock_t block, guint option_id, guint64 value);
287 /** Get UINT64 option value from an option block
289 * @param[in] block Block from which to get the option value
290 * @param[in] option_id Identifier value for option
291 * @param[out] value Returned value of option
292 * @return wtap_opttype_return_val - WTAP_OPTTYPE_SUCCESS if successful,
293 * error code otherwise
295 WS_DLL_PUBLIC wtap_opttype_return_val
296 wtap_optionblock_get_option_uint64(wtap_optionblock_t block, guint option_id, guint64* value);
298 /** Set UINT8 option value in an option block
300 * @param[in] block Block in which to set the option value
301 * @param[in] option_id Identifier value for option
302 * @param[in] value New value of option
303 * @return wtap_opttype_return_val - WTAP_OPTTYPE_SUCCESS if successful,
304 * error code otherwise
306 WS_DLL_PUBLIC wtap_opttype_return_val
307 wtap_optionblock_set_option_uint8(wtap_optionblock_t block, guint option_id, guint8 value);
309 /** Get UINT8 option value from an option block
311 * @param[in] block Block from which to get the option value
312 * @param[in] option_id Identifier value for option
313 * @param[out] value Returned value of option
314 * @return wtap_opttype_return_val - WTAP_OPTTYPE_SUCCESS if successful,
315 * error code otherwise
317 WS_DLL_PUBLIC wtap_opttype_return_val
318 wtap_optionblock_get_option_uint8(wtap_optionblock_t block, guint option_id, guint8* value);
320 /** Set a "custom" option value in an option block
322 * @param[in] block Block in which to set the option value
323 * @param[in] option_id Identifier value for option
324 * @param[in] value New value of option
325 * @return wtap_opttype_return_val - WTAP_OPTTYPE_SUCCESS if successful,
326 * error code otherwise
328 WS_DLL_PUBLIC wtap_opttype_return_val
329 wtap_optionblock_set_option_custom(wtap_optionblock_t block, guint option_id, void* value);
331 /** Get a "custom" option value from an option block
333 * @param[in] block Block from which to get the option value
334 * @param[in] option_id Identifier value for option
335 * @param[out] value Returned value of option
336 * @return wtap_opttype_return_val - WTAP_OPTTYPE_SUCCESS if successful,
337 * error code otherwise
339 WS_DLL_PUBLIC wtap_opttype_return_val
340 wtap_optionblock_get_option_custom(wtap_optionblock_t block, guint option_id, void** value);
342 /** Copy an option block to another.
344 * Any options that are in the destination but not the source are not removed.
345 * Options that are just in source will be added to destination
347 * @param[in] dest_block Block to be copied to
348 * @param[in] src_block Block to be copied from
350 void wtap_optionblock_copy_options(wtap_optionblock_t dest_block, wtap_optionblock_t src_block);
353 typedef void (*wtap_optionblock_foreach_func)(wtap_optionblock_t block, guint option_id, wtap_opttype_e option_type, wtap_option_type* option, void* user_data);
354 WS_DLL_PUBLIC void wtap_optionblock_foreach_option(wtap_optionblock_t block, wtap_optionblock_foreach_func func, void* user_data);
356 WS_DLL_PUBLIC int wtap_opttype_register_custom_block_type(const char* name, const char* description, wtap_block_create_func create,
357 wtap_mand_free_func free_mand, wtap_mand_copy_func copy_mand);
361 #endif /* __cplusplus */
363 #endif /* WTAP_OPT_TYPES_H */