1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
|
/* srt_table.c
* Helper routines common to all SRT taps.
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <string.h>
#include "proto.h"
#include "packet_info.h"
#include "srt_table.h"
#include <wsutil/ws_assert.h>
struct register_srt {
int proto_id; /* protocol id (0-indexed) */
const char* tap_listen_str; /* string used in register_tap_listener (NULL to use protocol name) */
int max_tables; /* Maximum number of tables expected (used by GUI to determine how to display tables) */
tap_packet_cb srt_func; /* function to be called for new incoming packets for SRT */
srt_init_cb srt_init; /* function to create dissector SRT tables */
srt_param_handler_cb param_cb; /* function to parse parameters of optional arguments of tap string */
void* param_data; /* Storage for tap parameter data */
};
int get_srt_proto_id(register_srt_t* srt)
{
if (!srt) {
return -1;
}
return srt->proto_id;
}
const char* get_srt_tap_listener_name(register_srt_t* srt)
{
return srt->tap_listen_str;
}
int get_srt_max_tables(register_srt_t* srt)
{
return srt->max_tables;
}
tap_packet_cb get_srt_packet_func(register_srt_t* srt)
{
return srt->srt_func;
}
void set_srt_table_param_data(register_srt_t* srt, void* data)
{
srt->param_data = data;
}
void* get_srt_table_param_data(register_srt_t* srt)
{
return srt->param_data;
}
void
free_srt_table_data(srt_stat_table *rst)
{
int i;
for(i=0;i<rst->num_procs;i++){
g_free(rst->procedures[i].procedure);
rst->procedures[i].procedure=NULL;
}
g_free(rst->filter_string);
rst->filter_string=NULL;
g_free(rst->procedures);
rst->procedures=NULL;
rst->num_procs=0;
}
void free_srt_table(register_srt_t *srt, GArray* srt_array)
{
guint i = 0;
srt_stat_table *srt_table;
for (i = 0; i < srt_array->len; i++)
{
srt_table = g_array_index(srt_array, srt_stat_table*, i);
free_srt_table_data(srt_table);
g_free(srt_table);
}
/* Clear the tables */
g_array_set_size(srt_array, 0);
/* Clear out any possible parameter data */
g_free(srt->param_data);
srt->param_data = NULL;
}
static void reset_srt_table_data(srt_stat_table *rst)
{
int i;
for(i=0;i<rst->num_procs;i++){
time_stat_init(&rst->procedures[i].stats);
}
}
void reset_srt_table(GArray* srt_array)
{
guint i = 0;
srt_stat_table *srt_table;
for (i = 0; i < srt_array->len; i++)
{
srt_table = g_array_index(srt_array, srt_stat_table*, i);
reset_srt_table_data(srt_table);
}
}
static wmem_tree_t *registered_srt_tables = NULL;
register_srt_t* get_srt_table_by_name(const char* name)
{
return (register_srt_t*)wmem_tree_lookup_string(registered_srt_tables, name, 0);
}
gchar* srt_table_get_tap_string(register_srt_t* srt)
{
GString *cmd_str = g_string_new(proto_get_protocol_filter_name(srt->proto_id));
g_string_append(cmd_str, ",srt");
return g_string_free(cmd_str, FALSE);
}
void srt_table_get_filter(register_srt_t* srt, const char *opt_arg, const char **filter, char** err)
{
gchar* cmd_str = srt_table_get_tap_string(srt);
guint len = (guint32)strlen(cmd_str);
guint pos = len;
*filter=NULL;
*err = NULL;
if(!strncmp(opt_arg, cmd_str, len))
{
if (srt->param_cb != NULL)
{
pos = srt->param_cb(srt, opt_arg + len, err);
if (*err != NULL)
return;
if (pos > 0)
pos += len;
}
if (opt_arg[pos] == ',')
{
*filter = opt_arg + pos+1;
}
}
g_free(cmd_str);
}
void srt_table_dissector_init(register_srt_t* srt, GArray* srt_array)
{
srt->srt_init(srt, srt_array);
}
void
register_srt_table(const int proto_id, const char* tap_listener, int max_tables, tap_packet_cb srt_packet_func, srt_init_cb init_cb, srt_param_handler_cb param_cb)
{
register_srt_t *table;
DISSECTOR_ASSERT(init_cb);
DISSECTOR_ASSERT(srt_packet_func);
table = wmem_new(wmem_epan_scope(), register_srt_t);
table->proto_id = proto_id;
if (tap_listener != NULL)
table->tap_listen_str = tap_listener;
else
table->tap_listen_str = proto_get_protocol_filter_name(proto_id);
table->max_tables = max_tables;
table->srt_func = srt_packet_func;
table->srt_init = init_cb;
table->param_cb = param_cb;
table->param_data = NULL;
if (registered_srt_tables == NULL)
registered_srt_tables = wmem_tree_new(wmem_epan_scope());
wmem_tree_insert_string(registered_srt_tables, proto_get_protocol_filter_name(proto_id), table, 0);
}
void srt_table_iterate_tables(wmem_foreach_func func, gpointer user_data)
{
wmem_tree_foreach(registered_srt_tables, func, user_data);
}
srt_stat_table*
init_srt_table(const char *name, const char *short_name, GArray *srt_array, int num_procs, const char* proc_column_name,
const char *filter_string, void* table_specific_data)
{
int i;
srt_stat_table *table = g_new(srt_stat_table, 1);
table->filter_string = g_strdup(filter_string);
table->name = name;
table->short_name = short_name;
table->proc_column_name = proc_column_name;
table->num_procs=num_procs;
table->procedures=g_new(srt_procedure_t, num_procs);
for(i=0;i<num_procs;i++){
time_stat_init(&table->procedures[i].stats);
table->procedures[i].proc_index = 0;
table->procedures[i].procedure = NULL;
}
g_array_insert_val(srt_array, srt_array->len, table);
table->table_specific_data = table_specific_data;
return table;
}
void
init_srt_table_row(srt_stat_table *rst, int indx, const char *procedure)
{
/* we have discovered a new procedure. Extend the table accordingly */
if(indx>=rst->num_procs){
int old_num_procs=rst->num_procs;
int i;
rst->num_procs=indx+1;
rst->procedures=(srt_procedure_t *)g_realloc(rst->procedures, sizeof(srt_procedure_t)*(rst->num_procs));
for(i=old_num_procs;i<rst->num_procs;i++){
time_stat_init(&rst->procedures[i].stats);
rst->procedures[i].proc_index = i;
rst->procedures[i].procedure=NULL;
}
}
rst->procedures[indx].proc_index = indx;
rst->procedures[indx].procedure=g_strdup(procedure);
}
void
add_srt_table_data(srt_stat_table *rst, int indx, const nstime_t *req_time, packet_info *pinfo)
{
srt_procedure_t *rp;
nstime_t t, delta;
ws_assert(indx >= 0 && indx < rst->num_procs);
rp=&rst->procedures[indx];
/* calculate time delta between request and reply */
t=pinfo->abs_ts;
nstime_delta(&delta, &t, req_time);
time_stat_update(&rp->stats, &delta, pinfo);
}
/*
* Editor modelines
*
* Local Variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
|