ipsec-tools/racoon/evt.c

   1 /* $Id: evt.c,v 1.2.4.1 2005/09/26 17:49:38 manubsd 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
  50 struct evtlist evtlist = TAILQ_HEAD_INITIALIZER(evtlist);
  51 int evtlist_len = 0;
  52
  53 void
  54 evt_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         /* If we are above the limit, don't record anything */
  65         if (evtlist_len > EVTLIST_MAX) {
  66                 plog(LLV_DEBUG, LOCATION, NULL,
  67                     "Cannot record event: event queue overflowed\n");
  68                 return;
  69         }
  70
  71         /* If we hit the limit, record an overflow event instead */
  72         if (evtlist_len == EVTLIST_MAX) {
  73                 plog(LLV_ERROR, LOCATION, NULL,
  74                     "Cannot record event: event queue overflow\n");
  75                 src = NULL;
  76                 dst = NULL;
  77                 type = EVTT_OVERFLOW;
  78                 optdata = NULL;
  79         }
  80
  81         len = sizeof(*evtdump);
  82         if (optdata)
  83                 len += optdata->l;
  84
  85         if ((evtdump = racoon_malloc(len)) == NULL) {
  86                 plog(LLV_ERROR, LOCATION, NULL, "Cannot record event: %s\n",
  87                     strerror(errno));
  88                 return;
  89         }
  90
  91         if ((evt = racoon_malloc(sizeof(*evt))) == NULL) {
  92                 plog(LLV_ERROR, LOCATION, NULL, "Cannot record event: %s\n",
  93                     strerror(errno));
  94                 racoon_free(evtdump);
  95                 return;
  96         }
  97
  98         if (src)
  99                 memcpy(&evtdump->src, src, sysdep_sa_len(src));
 100         if (dst)
 101                 memcpy(&evtdump->dst, dst, sysdep_sa_len(dst));
 102         evtdump->len = len;
 103         evtdump->type = type;
 104         time(&evtdump->timestamp);
 105
 106         if (optdata)
 107                 memcpy(evtdump + 1, optdata->v, optdata->l);
 108
 109         evt->dump = evtdump;
 110         TAILQ_INSERT_TAIL(&evtlist, evt, next);
 111
 112         evtlist_len++;
 113
 114         return;
 115 }
 116
 117 struct evtdump *
 118 evt_pop(void) {
 119         struct evtdump *evtdump;
 120         struct evt *evt;
 121
 122         if ((evt = TAILQ_FIRST(&evtlist)) == NULL)
 123                 return NULL;
 124
 125         evtdump = evt->dump;
 126         TAILQ_REMOVE(&evtlist, evt, next);
 127         racoon_free(evt);
 128         evtlist_len--;
 129
 130         return evtdump;
 131 }
 132
 133 vchar_t *
 134 evt_dump(void) {
 135         struct evtdump *evtdump;
 136         vchar_t *buf = NULL;
 137
 138         if ((evtdump = evt_pop()) != NULL) {
 139                 if ((buf = vmalloc(evtdump->len)) == NULL) {
 140                         plog(LLV_ERROR, LOCATION, NULL,
 141                             "evt_dump failed: %s\n", strerror(errno));
 142                         return NULL;
 143                 }
 144                 memcpy(buf->v, evtdump, evtdump->len);
 145                 racoon_free(evtdump);
 146         }
 147
 148         return buf;
 149 }