1/*
2 * Copyright (C) 2009 Johannes Berg <johannes@sipsolutions.net>
3 *
4 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation;
8 * version 2.1 of the License (not later!)
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 * GNU Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this program; if not,  see <http://www.gnu.org/licenses>
17 *
18 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
19 */
20#include <stdio.h>
21#include <stdlib.h>
22#include <string.h>
23
24#include "event-parse.h"
25
26#define INDENT 65
27
28static void print_string(struct trace_seq *s, struct event_format *event,
29			 const char *name, const void *data)
30{
31	struct format_field *f = pevent_find_field(event, name);
32	int offset;
33	int length;
34
35	if (!f) {
36		trace_seq_printf(s, "NOTFOUND:%s", name);
37		return;
38	}
39
40	offset = f->offset;
41	length = f->size;
42
43	if (!strncmp(f->type, "__data_loc", 10)) {
44		unsigned long long v;
45		if (pevent_read_number_field(f, data, &v)) {
46			trace_seq_printf(s, "invalid_data_loc");
47			return;
48		}
49		offset = v & 0xffff;
50		length = v >> 16;
51	}
52
53	trace_seq_printf(s, "%.*s", length, (char *)data + offset);
54}
55
56#define SF(fn)	pevent_print_num_field(s, fn ":%d", event, fn, record, 0)
57#define SFX(fn)	pevent_print_num_field(s, fn ":%#x", event, fn, record, 0)
58#define SP()	trace_seq_putc(s, ' ')
59
60static int drv_bss_info_changed(struct trace_seq *s,
61				struct pevent_record *record,
62				struct event_format *event, void *context)
63{
64	void *data = record->data;
65
66	print_string(s, event, "wiphy_name", data);
67	trace_seq_printf(s, " vif:");
68	print_string(s, event, "vif_name", data);
69	pevent_print_num_field(s, "(%d)", event, "vif_type", record, 1);
70
71	trace_seq_printf(s, "\n%*s", INDENT, "");
72	SF("assoc"); SP();
73	SF("aid"); SP();
74	SF("cts"); SP();
75	SF("shortpre"); SP();
76	SF("shortslot"); SP();
77	SF("dtimper"); SP();
78	trace_seq_printf(s, "\n%*s", INDENT, "");
79	SF("bcnint"); SP();
80	SFX("assoc_cap"); SP();
81	SFX("basic_rates"); SP();
82	SF("enable_beacon");
83	trace_seq_printf(s, "\n%*s", INDENT, "");
84	SF("ht_operation_mode");
85
86	return 0;
87}
88
89int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
90{
91	pevent_register_event_handler(pevent, -1, "mac80211",
92				      "drv_bss_info_changed",
93				      drv_bss_info_changed, NULL);
94	return 0;
95}
96
97void PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
98{
99	pevent_unregister_event_handler(pevent, -1, "mac80211",
100					"drv_bss_info_changed",
101					drv_bss_info_changed, NULL);
102}
103