1// SPDX-License-Identifier: LGPL-2.1
 2/*
 3 * Copyright (C) 2009 Johannes Berg <johannes@sipsolutions.net>
 4 */
 5#include <stdio.h>
 6#include <stdlib.h>
 7#include <string.h>
 8
 9#include "event-parse.h"
10#include "trace-seq.h"
11
12#define INDENT 65
13
14static void print_string(struct trace_seq *s, struct tep_event *event,
15			 const char *name, const void *data)
16{
17	struct tep_format_field *f = tep_find_field(event, name);
18	int offset;
19	int length;
20
21	if (!f) {
22		trace_seq_printf(s, "NOTFOUND:%s", name);
23		return;
24	}
25
26	offset = f->offset;
27	length = f->size;
28
29	if (!strncmp(f->type, "__data_loc", 10)) {
30		unsigned long long v;
31		if (tep_read_number_field(f, data, &v)) {
32			trace_seq_printf(s, "invalid_data_loc");
33			return;
34		}
35		offset = v & 0xffff;
36		length = v >> 16;
37	}
38
39	trace_seq_printf(s, "%.*s", length, (char *)data + offset);
40}
41
42#define SF(fn)	tep_print_num_field(s, fn ":%d", event, fn, record, 0)
43#define SFX(fn)	tep_print_num_field(s, fn ":%#x", event, fn, record, 0)
44#define SP()	trace_seq_putc(s, ' ')
45
46static int drv_bss_info_changed(struct trace_seq *s,
47				struct tep_record *record,
48				struct tep_event *event, void *context)
49{
50	void *data = record->data;
51
52	print_string(s, event, "wiphy_name", data);
53	trace_seq_printf(s, " vif:");
54	print_string(s, event, "vif_name", data);
55	tep_print_num_field(s, "(%d)", event, "vif_type", record, 1);
56
57	trace_seq_printf(s, "\n%*s", INDENT, "");
58	SF("assoc"); SP();
59	SF("aid"); SP();
60	SF("cts"); SP();
61	SF("shortpre"); SP();
62	SF("shortslot"); SP();
63	SF("dtimper"); SP();
64	trace_seq_printf(s, "\n%*s", INDENT, "");
65	SF("bcnint"); SP();
66	SFX("assoc_cap"); SP();
67	SFX("basic_rates"); SP();
68	SF("enable_beacon");
69	trace_seq_printf(s, "\n%*s", INDENT, "");
70	SF("ht_operation_mode");
71
72	return 0;
73}
74
75int TEP_PLUGIN_LOADER(struct tep_handle *tep)
76{
77	tep_register_event_handler(tep, -1, "mac80211",
78				   "drv_bss_info_changed",
79				   drv_bss_info_changed, NULL);
80	return 0;
81}
82
83void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
84{
85	tep_unregister_event_handler(tep, -1, "mac80211",
86				     "drv_bss_info_changed",
87				     drv_bss_info_changed, NULL);
88}