evt.c revision 1.1.1.1 
1/* $Id: evt.c,v 1.1.1.1 2005/02/12 11:11:53 manu Exp $ */
2
3/*
4 * Copyright (C) 2004 Emmanuel Dreyfus
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include "config.h"
33
34#include <errno.h>
35#include <string.h>
36#include <stdio.h>
37#include <time.h>
38#include <unistd.h>
39#include <stdlib.h>
40#include <sys/queue.h>
41#include <sys/socket.h>
42
43#include "vmbuf.h"
44#include "plog.h"
45#include "misc.h"
46#include "gcmalloc.h"
47#include "evt.h"
48
49
50struct evtlist evtlist = TAILQ_HEAD_INITIALIZER(evtlist);
51int evtlist_len = 0;
52
53void
54evt_push(src, dst, type, optdata)
55	struct sockaddr *src;
56	struct sockaddr *dst;
57	int type;
58	vchar_t *optdata;
59{
60	struct evtdump *evtdump;
61	struct evt *evt;
62	size_t len;
63
64	len = sizeof(*evtdump);
65	if (optdata)
66		len += optdata->l;
67
68	if ((evtdump = racoon_malloc(len)) == NULL) {
69		plog(LLV_ERROR, LOCATION, NULL, "Cannot record event: %s\n",
70		    strerror(errno));
71		return;
72	}
73
74	if ((evt = racoon_malloc(sizeof(*evt))) == NULL) {
75		plog(LLV_ERROR, LOCATION, NULL, "Cannot record event: %s\n",
76		    strerror(errno));
77		racoon_free(evtdump);
78		return;
79	}
80
81	if (src)
82		memcpy(&evtdump->src, src, sysdep_sa_len(src));
83	if (dst)
84		memcpy(&evtdump->dst, dst, sysdep_sa_len(dst));
85	evtdump->len = len;
86	evtdump->type = type;
87	time(&evtdump->timestamp);
88
89	if (optdata)
90		memcpy(evtdump + 1, optdata->v, optdata->l);
91
92	evt->dump = evtdump;
93	TAILQ_INSERT_TAIL(&evtlist, evt, next);
94
95	if (evtlist_len++ == EVTLIST_MAX)
96		evt_push(NULL, NULL, EVTT_OVERFLOW, NULL);
97
98	return;
99}
100
101struct evtdump *
102evt_pop(void) {
103	struct evtdump *evtdump;
104	struct evt *evt;
105
106	if ((evt = TAILQ_FIRST(&evtlist)) == NULL)
107		return NULL;
108
109	evtdump = evt->dump;
110	TAILQ_REMOVE(&evtlist, evt, next);
111	racoon_free(evt);
112	evtlist_len--;
113
114	return evtdump;
115}
116
117vchar_t *
118evt_dump(void) {
119	struct evtdump *evtdump;
120	vchar_t *buf = NULL;
121
122	if ((evtdump = evt_pop()) != NULL) {
123		if ((buf = vmalloc(evtdump->len)) == NULL) {
124			plog(LLV_ERROR, LOCATION, NULL,
125			    "evt_dump failed: %s\n", strerror(errno));
126			return NULL;
127		}
128		memcpy(buf->v, evtdump, evtdump->len);
129		racoon_free(evtdump);
130	}
131
132	return buf;
133}
134