More PortAudio removal.
[metze/wireshark/wip.git] / epan / follow.h
1 /* follow.h
2  *
3  * Copyright 1998 Mike Hall <mlh@io.com>
4  *
5  * Wireshark - Network traffic analyzer
6  * By Gerald Combs <gerald@wireshark.org>
7  * Copyright 1998 Gerald Combs
8  *
9  * SPDX-License-Identifier: GPL-2.0-or-later
10  *
11  */
12
13 #ifndef __FOLLOW_H__
14 #define __FOLLOW_H__
15
16 #ifdef __cplusplus
17 extern "C" {
18 #endif /* __cplusplus */
19
20 #include <epan/epan.h>
21 #include <epan/packet.h>
22 #include <epan/ipv6.h>
23 #include <epan/wmem/wmem.h>
24 #include "ws_symbol_export.h"
25
26 typedef enum {
27   TCP_STREAM = 0,
28   UDP_STREAM,
29   MAX_STREAM
30 } stream_type;
31
32 typedef enum {
33     FRS_OK,
34     FRS_OPEN_ERROR,
35     FRS_READ_ERROR,
36     FRS_PRINT_ERROR
37 } frs_return_t;
38
39 /* Type of follow we are doing */
40 typedef enum {
41     FOLLOW_TCP,
42     FOLLOW_SSL,
43     FOLLOW_UDP,
44     FOLLOW_HTTP
45 } follow_type_t;
46
47 /* Show Type */
48 typedef enum {
49     SHOW_ASCII,
50     SHOW_EBCDIC,
51     SHOW_HEXDUMP,
52     SHOW_CARRAY,
53     SHOW_RAW,
54     SHOW_YAML,
55     SHOW_UTF8,
56     SHOW_UTF16
57 } show_type_t;
58
59
60 /* Show Stream */
61 typedef enum {
62     FROM_CLIENT,
63     FROM_SERVER,
64     BOTH_HOSTS
65 } show_stream_t;
66
67 typedef union _stream_addr {
68   guint32 ipv4;
69   ws_in6_addr ipv6;
70 } stream_addr;
71
72 struct _follow_info;
73
74 typedef gboolean (*follow_print_line_func)(char *, size_t, gboolean, void *);
75 typedef frs_return_t (*follow_read_stream_func)(struct _follow_info *follow_info, follow_print_line_func follow_print, void *arg);
76
77 typedef struct {
78     gboolean is_server;
79     guint32 packet_num;
80     guint32 seq; /* TCP only */
81     GByteArray *data;
82 } follow_record_t;
83
84 typedef struct _follow_info {
85     show_stream_t   show_stream;
86     char            *filter_out_filter;
87     GList           *payload;
88     guint           bytes_written[2]; /* Index with FROM_CLIENT or FROM_SERVER for readability. */
89     guint32         seq[2]; /* TCP only */
90     GList           *fragments[2]; /* TCP only */
91     guint           client_port;
92     guint           server_port;
93     address         client_ip;
94     address         server_ip;
95     void*           gui_data;
96 } follow_info_t;
97
98 struct register_follow;
99 typedef struct register_follow register_follow_t;
100
101 typedef gchar* (*follow_conv_filter_func)(packet_info* pinfo, int* stream);
102 typedef gchar* (*follow_index_filter_func)(int stream);
103 typedef gchar* (*follow_address_filter_func)(address* src_addr, address* dst_addr, int src_port, int dst_port);
104 typedef gchar* (*follow_port_to_display_func)(wmem_allocator_t *allocator, guint port);
105 typedef gboolean (*follow_tap_func)(void *tapdata, packet_info *pinfo, epan_dissect_t *edt, const void *data);
106
107 WS_DLL_PUBLIC
108 void register_follow_stream(const int proto_id, const char* tap_listener,
109                             follow_conv_filter_func conv_filter, follow_index_filter_func index_filter, follow_address_filter_func address_filter,
110                             follow_port_to_display_func port_to_display, follow_tap_func tap_handler);
111
112 /** Get protocol ID from registered follower
113  *
114  * @param follower Registered follower
115  * @return protocol id of follower
116  */
117 WS_DLL_PUBLIC int get_follow_proto_id(register_follow_t* follower);
118
119 /** Get tap name string from registered follower (used for register_tap_listener)
120  *
121  * @param follower Registered follower
122  * @return tap name string of follower
123  */
124 WS_DLL_PUBLIC const char* get_follow_tap_string(register_follow_t* follower);
125
126 /** Get a registered follower by protocol short name
127  *
128  * @param proto_short_name Protocol short name
129  * @return tap registered follower if match, otherwise NULL
130  */
131 WS_DLL_PUBLIC register_follow_t* get_follow_by_name(const char* proto_short_name);
132
133 /** Provide function that builds a follow filter based on the current packet's conversation.
134  *
135  * @param follower [in] Registered follower
136  * @return A filter function handler
137  */
138 WS_DLL_PUBLIC follow_conv_filter_func get_follow_conv_func(register_follow_t* follower);
139
140 /** Provide function that builds a follow filter based on stream.
141  *
142  * @param follower [in] Registered follower
143  * @return A filter function handler
144  */
145 WS_DLL_PUBLIC follow_index_filter_func get_follow_index_func(register_follow_t* follower);
146
147 /** Provide function that builds a follow filter based on address/port pairs.
148  *
149  * @param follower [in] Registered follower
150  * @return A filter function handler
151  */
152 WS_DLL_PUBLIC follow_address_filter_func get_follow_address_func(register_follow_t* follower);
153
154 /** Provide function that resolves port number to name based on follower.
155  *
156  * @param follower [in] Registered follower
157  * @return A port resolver function handler
158  */
159 WS_DLL_PUBLIC follow_port_to_display_func get_follow_port_to_display(register_follow_t* follower);
160
161 /** Provide function that handles tap data (tap_packet_cb parameter of register_tap_listener)
162  *
163  * @param follower [in] Registered follower
164  * @return A tap data handler
165  */
166 WS_DLL_PUBLIC follow_tap_func get_follow_tap_handler(register_follow_t* follower);
167
168
169 /** Tap function handler when dissector's tap provides follow data as a tvb.
170  * Used by TCP, UDP and HTTP followers
171  */
172 WS_DLL_PUBLIC gboolean
173 follow_tvb_tap_listener(void *tapdata, packet_info *pinfo, epan_dissect_t *edt _U_, const void *data);
174
175 /** Interator to walk all registered followers and execute func
176  *
177  * @param func action to be performed on all converation tables
178  * @param user_data any data needed to help perform function
179  */
180 WS_DLL_PUBLIC void follow_iterate_followers(wmem_foreach_func func, gpointer user_data);
181
182 /** Generate -z stat (tap) name for a follower
183  * Currently used only by TShark
184  *
185  * @param follower [in] Registered follower
186  * @return A tap data handler
187  */
188 WS_DLL_PUBLIC gchar* follow_get_stat_tap_string(register_follow_t* follower);
189
190 /** Clear counters, addresses and ports of follow_info_t
191  *
192  * @param info [in] follower info
193  */
194 WS_DLL_PUBLIC void follow_reset_stream(follow_info_t* info);
195
196 /** Free follow_info_t structure
197  * Free everything except the GUI element
198  *
199  * @param follow_info [in] follower info
200  */
201 WS_DLL_PUBLIC void follow_info_free(follow_info_t* follow_info);
202
203 #ifdef __cplusplus
204 }
205 #endif /* __cplusplus */
206
207 #endif