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1 /*	$NetBSD: evt.c,v 1.5 2006/09/09 16:22:09 manu Exp $	*/
2 
3 /* Id: evt.c,v 1.5 2006/06/22 20:11:35 manubsd Exp */
4 
5 /*
6  * Copyright (C) 2004 Emmanuel Dreyfus
7  * All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  * 3. Neither the name of the project nor the names of its contributors
18  *    may be used to endorse or promote products derived from this software
19  *    without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  */
33 
34 #include "config.h"
35 
36 #include <errno.h>
37 #include <string.h>
38 #include <stdio.h>
39 #include <time.h>
40 #include <unistd.h>
41 #include <stdlib.h>
42 #include <sys/queue.h>
43 #include <sys/socket.h>
44 
45 #include "vmbuf.h"
46 #include "plog.h"
47 #include "misc.h"
48 #include "admin.h"
49 #include "gcmalloc.h"
50 #include "evt.h"
51 
52 #ifdef ENABLE_ADMINPORT
53 struct evtlist evtlist = TAILQ_HEAD_INITIALIZER(evtlist);
54 int evtlist_len = 0;
55 
56 void
evt_push(src,dst,type,optdata)57 evt_push(src, dst, type, optdata)
58 	struct sockaddr *src;
59 	struct sockaddr *dst;
60 	int type;
61 	vchar_t *optdata;
62 {
63 	struct evtdump *evtdump;
64 	struct evt *evt;
65 	size_t len;
66 
67 	/* If admin socket is disabled, silently discard anything */
68 	if (adminsock_path == NULL)
69 		return;
70 
71 	/* If we are above the limit, don't record anything */
72 	if (evtlist_len > EVTLIST_MAX) {
73 		plog(LLV_DEBUG, LOCATION, NULL,
74 		    "Cannot record event: event queue overflowed\n");
75 		return;
76 	}
77 
78 	/* If we hit the limit, record an overflow event instead */
79 	if (evtlist_len == EVTLIST_MAX) {
80 		plog(LLV_ERROR, LOCATION, NULL,
81 		    "Cannot record event: event queue overflow\n");
82 		src = NULL;
83 		dst = NULL;
84 		type = EVTT_OVERFLOW;
85 		optdata = NULL;
86 	}
87 
88 	len = sizeof(*evtdump);
89 	if (optdata)
90 		len += optdata->l;
91 
92 	if ((evtdump = racoon_malloc(len)) == NULL) {
93 		plog(LLV_ERROR, LOCATION, NULL, "Cannot record event: %s\n",
94 		    strerror(errno));
95 		return;
96 	}
97 
98 	if ((evt = racoon_malloc(sizeof(*evt))) == NULL) {
99 		plog(LLV_ERROR, LOCATION, NULL, "Cannot record event: %s\n",
100 		    strerror(errno));
101 		racoon_free(evtdump);
102 		return;
103 	}
104 
105 	if (src)
106 		memcpy(&evtdump->src, src, sysdep_sa_len(src));
107 	if (dst)
108 		memcpy(&evtdump->dst, dst, sysdep_sa_len(dst));
109 	evtdump->len = len;
110 	evtdump->type = type;
111 	time(&evtdump->timestamp);
112 
113 	if (optdata)
114 		memcpy(evtdump + 1, optdata->v, optdata->l);
115 
116 	evt->dump = evtdump;
117 	TAILQ_INSERT_TAIL(&evtlist, evt, next);
118 
119 	evtlist_len++;
120 
121 	return;
122 }
123 
124 struct evtdump *
evt_pop(void)125 evt_pop(void) {
126 	struct evtdump *evtdump;
127 	struct evt *evt;
128 
129 	if ((evt = TAILQ_FIRST(&evtlist)) == NULL)
130 		return NULL;
131 
132 	evtdump = evt->dump;
133 	TAILQ_REMOVE(&evtlist, evt, next);
134 	racoon_free(evt);
135 	evtlist_len--;
136 
137 	return evtdump;
138 }
139 
140 vchar_t *
evt_dump(void)141 evt_dump(void) {
142 	struct evtdump *evtdump;
143 	vchar_t *buf = NULL;
144 
145 	if ((evtdump = evt_pop()) != NULL) {
146 		if ((buf = vmalloc(evtdump->len)) == NULL) {
147 			plog(LLV_ERROR, LOCATION, NULL,
148 			    "evt_dump failed: %s\n", strerror(errno));
149 			return NULL;
150 		}
151 		memcpy(buf->v, evtdump, evtdump->len);
152 		racoon_free(evtdump);
153 	}
154 
155 	return buf;
156 }
157 
158 #endif /* ENABLE_ADMINPORT */
159