ipsec-tools/racoon/evt.c

   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
  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 *
 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 *
 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 */