summaryrefslogtreecommitdiffstats
path: root/epan/rtd_table.c
blob: 738e66ed40b304e64c9a0fb550213c69ae9c215d (plain)
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
/* rtd_table.c
 * Helper routines common to all RTD taps.
 * Based on srt_table.c
 *
 * 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 "rtd_table.h"

struct register_rtd {
    int proto_id;              /* protocol id (0-indexed) */
    const char* tap_listen_str;      /* string used in register_tap_listener (NULL to use protocol name) */
    tap_packet_cb rtd_func;    /* function to be called for new incoming packets for RTD */
    guint num_tables;
    guint num_timestats;
    const value_string* vs_type;
    rtd_filter_check_cb filter_check;
};

int get_rtd_proto_id(register_rtd_t* rtd)
{
    if (!rtd) {
        return -1;
    }
    return rtd->proto_id;
}

const char* get_rtd_tap_listener_name(register_rtd_t* rtd)
{
    return rtd->tap_listen_str;
}

tap_packet_cb get_rtd_packet_func(register_rtd_t* rtd)
{
    return rtd->rtd_func;
}

guint get_rtd_num_tables(register_rtd_t* rtd) {
    return rtd->num_tables;
}

const value_string* get_rtd_value_string(register_rtd_t* rtd)
{
    return rtd->vs_type;
}

static wmem_tree_t *registered_rtd_tables = NULL;

void
register_rtd_table(const int proto_id, const char* tap_listener, guint num_tables, guint num_timestats, const value_string* vs_type,
                   tap_packet_cb rtd_packet_func, rtd_filter_check_cb filter_check_cb)
{
    register_rtd_t *table;
    DISSECTOR_ASSERT(rtd_packet_func);

    table = wmem_new(wmem_epan_scope(), register_rtd_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->rtd_func      = rtd_packet_func;
    table->num_tables = num_tables;
    table->num_timestats = num_timestats;
    table->vs_type = vs_type;
    table->filter_check = filter_check_cb;

    if (registered_rtd_tables == NULL)
        registered_rtd_tables = wmem_tree_new(wmem_epan_scope());

    wmem_tree_insert_string(registered_rtd_tables, proto_get_protocol_filter_name(proto_id), table, 0);
}

void free_rtd_table(rtd_stat_table* table)
{
    guint i;

    for (i = 0; i < table->num_rtds; i++)
    {
        g_free(table->time_stats[i].rtd);
    }
    g_free(table->time_stats);
    table->time_stats = NULL;
    table->num_rtds = 0;
}

void reset_rtd_table(rtd_stat_table* table)
{
    guint i = 0;

    for (i = 0; i < table->num_rtds; i++)
        memset(table->time_stats[i].rtd, 0, sizeof(timestat_t)*table->time_stats[i].num_timestat);
}

register_rtd_t* get_rtd_table_by_name(const char* name)
{
    return (register_rtd_t*)wmem_tree_lookup_string(registered_rtd_tables, name, 0);
}

gchar* rtd_table_get_tap_string(register_rtd_t* rtd)
{
    GString *cmd_str = g_string_new(proto_get_protocol_filter_name(rtd->proto_id));
    g_string_append(cmd_str, ",rtd");
    return g_string_free(cmd_str, FALSE);
}

void rtd_table_get_filter(register_rtd_t* rtd, const char *opt_arg, const char **filter, char** err)
{
    gchar* cmd_str = rtd_table_get_tap_string(rtd);
    guint len = (guint) strlen(cmd_str);
    *filter=NULL;
    *err=NULL;

    if (!strncmp(opt_arg, cmd_str, len))
    {
        if (opt_arg[len] == ',')
        {
           *filter = opt_arg + len+1;
        }
	}

    if (rtd->filter_check)
        rtd->filter_check(opt_arg, filter, err);

    g_free(cmd_str);
}

void rtd_table_dissector_init(register_rtd_t* rtd, rtd_stat_table* table, rtd_gui_init_cb gui_callback, void *callback_data)
{
    guint i;

    table->num_rtds = rtd->num_tables;
    table->time_stats = g_new0(rtd_timestat, rtd->num_tables);

    for (i = 0; i < table->num_rtds; i++)
    {
        table->time_stats[i].num_timestat = rtd->num_timestats;
        table->time_stats[i].rtd = g_new0(timestat_t, rtd->num_timestats);
    }

    if (gui_callback)
        gui_callback(table, callback_data);
}

void rtd_table_iterate_tables(wmem_foreach_func func, gpointer user_data)
{
    wmem_tree_foreach(registered_rtd_tables, func, user_data);
}

/*
 * 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:
 */