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}