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#include "trace-seq.h"
 26
 27#define INDENT 65
 28
 29static void print_string(struct trace_seq *s, struct tep_event *event,
 30			 const char *name, const void *data)
 31{
 32	struct tep_format_field *f = tep_find_field(event, name);
 33	int offset;
 34	int length;
 35
 36	if (!f) {
 37		trace_seq_printf(s, "NOTFOUND:%s", name);
 38		return;
 39	}
 40
 41	offset = f->offset;
 42	length = f->size;
 43
 44	if (!strncmp(f->type, "__data_loc", 10)) {
 45		unsigned long long v;
 46		if (tep_read_number_field(f, data, &v)) {
 47			trace_seq_printf(s, "invalid_data_loc");
 48			return;
 49		}
 50		offset = v & 0xffff;
 51		length = v >> 16;
 52	}
 53
 54	trace_seq_printf(s, "%.*s", length, (char *)data + offset);
 55}
 56
 57#define SF(fn)	tep_print_num_field(s, fn ":%d", event, fn, record, 0)
 58#define SFX(fn)	tep_print_num_field(s, fn ":%#x", event, fn, record, 0)
 59#define SP()	trace_seq_putc(s, ' ')
 60
 61static int drv_bss_info_changed(struct trace_seq *s,
 62				struct tep_record *record,
 63				struct tep_event *event, void *context)
 64{
 65	void *data = record->data;
 66
 67	print_string(s, event, "wiphy_name", data);
 68	trace_seq_printf(s, " vif:");
 69	print_string(s, event, "vif_name", data);
 70	tep_print_num_field(s, "(%d)", event, "vif_type", record, 1);
 71
 72	trace_seq_printf(s, "\n%*s", INDENT, "");
 73	SF("assoc"); SP();
 74	SF("aid"); SP();
 75	SF("cts"); SP();
 76	SF("shortpre"); SP();
 77	SF("shortslot"); SP();
 78	SF("dtimper"); SP();
 79	trace_seq_printf(s, "\n%*s", INDENT, "");
 80	SF("bcnint"); SP();
 81	SFX("assoc_cap"); SP();
 82	SFX("basic_rates"); SP();
 83	SF("enable_beacon");
 84	trace_seq_printf(s, "\n%*s", INDENT, "");
 85	SF("ht_operation_mode");
 86
 87	return 0;
 88}
 89
 90int TEP_PLUGIN_LOADER(struct tep_handle *tep)
 91{
 92	tep_register_event_handler(tep, -1, "mac80211",
 93				   "drv_bss_info_changed",
 94				   drv_bss_info_changed, NULL);
 95	return 0;
 96}
 97
 98void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
 99{
100	tep_unregister_event_handler(tep, -1, "mac80211",
101				     "drv_bss_info_changed",
102				     drv_bss_info_changed, NULL);
103}