1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25 
  26 #pragma ident   "%Z%%M% %I%     %E% SMI"
  27 
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <ctype.h>
  31 #include <syslog.h>
  32 #include <stdarg.h>
  33 #include <sys/types.h>
  34 #include <sys/socket.h>
  35 #include <net/if.h>
  36 #include <netinet/in.h>
  37 #include <netinet/if_ether.h>
  38 #include <arpa/inet.h>
  39 #include <netinet/dhcp.h>
  40 #include <netdb.h>
  41 #include "dhcpd.h"
  42 
  43 static char     *dhcp_msg_cats[] = {
  44         /* L_ASSIGN */          "ASSIGN",
  45         /* L_REPLY */           "EXTEND",
  46         /* L_RELEASE */         "RELEASE",
  47         /* L_DECLINE */         "DECLINE",
  48         /* L_INFORM */          "INFORM",
  49         /* L_NAK */             "NAK",
  50         /* L_ICMP_ECHO */       "ICMP-ECHO",
  51         /* L_RELAY_REQ */       "RELAY-SRVR",
  52         /* L_RELAY_REP */       "RELAY-CLNT"
  53 };
  54 
  55 static char     *protos[] = {
  56         /* P_BOOTP */           "BOOTP",
  57         /* P_DHCP */            "DHCP"
  58 };
  59 
  60 /*
  61  * Transaction logging. Note - if we're in debug mode, the transactions
  62  * are logged to the console!
  63  *
  64  * 'cip' and 'sip' are expected in network order.
  65  */
  66 void
  67 logtrans(DHCP_PROTO p, DHCP_MSG_CATEGORIES type, time_t lease,
  68     struct in_addr cip, struct in_addr sip, PKT_LIST *plp)
  69 {
  70         char    *cat, *proto, *t, *class_id;
  71         uint_t  maclen;
  72         char    class_idbuf[DHCP_MAX_OPT_SIZE];
  73         char    cidbuf[DHCP_MAX_OPT_SIZE];
  74         char    ntoabc[INET_ADDRSTRLEN], ntoabs[INET_ADDRSTRLEN];
  75         char    macbuf[(sizeof (((PKT *)NULL)->chaddr) * 2) + 1];
  76 
  77         if (log_local < 0)
  78                 return;
  79 
  80         proto = protos[p];
  81         cat = dhcp_msg_cats[type];
  82 
  83         (void) disp_cid(plp, cidbuf, sizeof (cidbuf));
  84 
  85         class_id = get_class_id(plp, class_idbuf, sizeof (class_idbuf));
  86 
  87         /* convert white space in class id into periods (.) */
  88         if (class_id != NULL) {
  89                 for (t = class_id; *t != '\0'; t++) {
  90                         if (isspace(*t))
  91                                 *t = '.';
  92                 }
  93         } else
  94                 class_id = "N/A";
  95 
  96         maclen = sizeof (macbuf);
  97         macbuf[0] = '\0';
  98         (void) octet_to_hexascii(plp->pkt->chaddr, plp->pkt->hlen, macbuf,
  99             &maclen);
 100 
 101         dhcpmsg(log_local | LOG_NOTICE, "%s %s %010ld %010ld %s %s %s %s %s\n",
 102             proto, cat, time(NULL), lease,
 103             inet_ntop(AF_INET, &cip, ntoabc, sizeof (ntoabc)),
 104             inet_ntop(AF_INET, &sip, ntoabs, sizeof (ntoabs)),
 105             cidbuf, class_id, macbuf);
 106 }