3 * Copyright 1998 Mike Hall <mlh@io.com>
5 * Wireshark - Network traffic analyzer
6 * By Gerald Combs <gerald@wireshark.org>
7 * Copyright 1998 Gerald Combs
9 * SPDX-License-Identifier: GPL-2.0-or-later
18 #endif /* __cplusplus */
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"
39 /* Type of follow we are doing */
67 typedef union _stream_addr {
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);
80 guint32 seq; /* TCP only */
84 typedef struct _follow_info {
85 show_stream_t show_stream;
86 char *filter_out_filter;
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 */
98 struct register_follow;
99 typedef struct register_follow register_follow_t;
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);
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);
112 /** Get protocol ID from registered follower
114 * @param follower Registered follower
115 * @return protocol id of follower
117 WS_DLL_PUBLIC int get_follow_proto_id(register_follow_t* follower);
119 /** Get tap name string from registered follower (used for register_tap_listener)
121 * @param follower Registered follower
122 * @return tap name string of follower
124 WS_DLL_PUBLIC const char* get_follow_tap_string(register_follow_t* follower);
126 /** Get a registered follower by protocol short name
128 * @param proto_short_name Protocol short name
129 * @return tap registered follower if match, otherwise NULL
131 WS_DLL_PUBLIC register_follow_t* get_follow_by_name(const char* proto_short_name);
133 /** Provide function that builds a follow filter based on the current packet's conversation.
135 * @param follower [in] Registered follower
136 * @return A filter function handler
138 WS_DLL_PUBLIC follow_conv_filter_func get_follow_conv_func(register_follow_t* follower);
140 /** Provide function that builds a follow filter based on stream.
142 * @param follower [in] Registered follower
143 * @return A filter function handler
145 WS_DLL_PUBLIC follow_index_filter_func get_follow_index_func(register_follow_t* follower);
147 /** Provide function that builds a follow filter based on address/port pairs.
149 * @param follower [in] Registered follower
150 * @return A filter function handler
152 WS_DLL_PUBLIC follow_address_filter_func get_follow_address_func(register_follow_t* follower);
154 /** Provide function that resolves port number to name based on follower.
156 * @param follower [in] Registered follower
157 * @return A port resolver function handler
159 WS_DLL_PUBLIC follow_port_to_display_func get_follow_port_to_display(register_follow_t* follower);
161 /** Provide function that handles tap data (tap_packet_cb parameter of register_tap_listener)
163 * @param follower [in] Registered follower
164 * @return A tap data handler
166 WS_DLL_PUBLIC follow_tap_func get_follow_tap_handler(register_follow_t* follower);
169 /** Tap function handler when dissector's tap provides follow data as a tvb.
170 * Used by TCP, UDP and HTTP followers
172 WS_DLL_PUBLIC gboolean
173 follow_tvb_tap_listener(void *tapdata, packet_info *pinfo, epan_dissect_t *edt _U_, const void *data);
175 /** Interator to walk all registered followers and execute func
177 * @param func action to be performed on all converation tables
178 * @param user_data any data needed to help perform function
180 WS_DLL_PUBLIC void follow_iterate_followers(wmem_foreach_func func, gpointer user_data);
182 /** Generate -z stat (tap) name for a follower
183 * Currently used only by TShark
185 * @param follower [in] Registered follower
186 * @return A tap data handler
188 WS_DLL_PUBLIC gchar* follow_get_stat_tap_string(register_follow_t* follower);
190 /** Clear counters, addresses and ports of follow_info_t
192 * @param info [in] follower info
194 WS_DLL_PUBLIC void follow_reset_stream(follow_info_t* info);
196 /** Free follow_info_t structure
197 * Free everything except the GUI element
199 * @param follow_info [in] follower info
201 WS_DLL_PUBLIC void follow_info_free(follow_info_t* follow_info);
205 #endif /* __cplusplus */