349 lines
8.5 KiB
C
349 lines
8.5 KiB
C
/*
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* Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Format and print bootp packets.
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*/
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#ifndef lint
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static char rcsid[] =
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"@(#) $Header: print-bootp.c,v 1.42 96/07/23 14:17:22 leres Exp $ (LBL)";
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#endif
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#if __STDC__
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struct mbuf;
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struct rtentry;
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#endif
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet/if_ether.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <string.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "bootp.h"
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static void rfc1048_print(const u_char *, u_int);
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static void cmu_print(const u_char *, u_int);
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static char tstr[] = " [|bootp]";
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/*
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* Print bootp requests
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*/
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void
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bootp_print(register const u_char *cp, u_int length,
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u_short sport, u_short dport)
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{
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register const struct bootp *bp;
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static u_char vm_cmu[4] = VM_CMU;
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static u_char vm_rfc1048[4] = VM_RFC1048;
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bp = (struct bootp *)cp;
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TCHECK(bp->bp_op);
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switch (bp->bp_op) {
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case BOOTREQUEST:
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/* Usually, a request goes from a client to a server */
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if (sport != IPPORT_BOOTPC || dport != IPPORT_BOOTPS)
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printf(" (request)");
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break;
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case BOOTREPLY:
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/* Usually, a reply goes from a server to a client */
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if (sport != IPPORT_BOOTPS || dport != IPPORT_BOOTPC)
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printf(" (reply)");
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break;
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default:
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printf(" bootp-#%d", bp->bp_op);
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}
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TCHECK(bp->bp_secs);
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/* The usual hardware address type is 1 (10Mb Ethernet) */
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if (bp->bp_htype != 1)
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printf(" htype-#%d", bp->bp_htype);
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/* The usual length for 10Mb Ethernet address is 6 bytes */
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if (bp->bp_htype != 1 || bp->bp_hlen != 6)
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printf(" hlen:%d", bp->bp_hlen);
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/* Only print interesting fields */
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if (bp->bp_hops)
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printf(" hops:%d", bp->bp_hops);
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if (bp->bp_xid)
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printf(" xid:0x%x", (u_int32_t)ntohl(bp->bp_xid));
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if (bp->bp_secs)
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printf(" secs:%d", ntohs(bp->bp_secs));
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/* Client's ip address */
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TCHECK(bp->bp_ciaddr);
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if (bp->bp_ciaddr.s_addr)
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printf(" C:%s", ipaddr_string(&bp->bp_ciaddr));
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/* 'your' ip address (bootp client) */
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TCHECK(bp->bp_yiaddr);
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if (bp->bp_yiaddr.s_addr)
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printf(" Y:%s", ipaddr_string(&bp->bp_yiaddr));
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/* Server's ip address */
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TCHECK(bp->bp_siaddr);
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if (bp->bp_siaddr.s_addr)
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printf(" S:%s", ipaddr_string(&bp->bp_siaddr));
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/* Gateway's ip address */
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TCHECK(bp->bp_giaddr);
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if (bp->bp_giaddr.s_addr)
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printf(" G:%s", ipaddr_string(&bp->bp_giaddr));
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/* Client's Ethernet address */
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if (bp->bp_htype == 1 && bp->bp_hlen == 6) {
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register const struct ether_header *eh;
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register const char *e;
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TCHECK2(bp->bp_chaddr[0], 6);
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eh = (struct ether_header *)packetp;
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if (bp->bp_op == BOOTREQUEST)
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e = (const char *)ESRC(eh);
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else if (bp->bp_op == BOOTREPLY)
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e = (const char *)EDST(eh);
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else
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e = 0;
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if (e == 0 || memcmp((char *)bp->bp_chaddr, e, 6) != 0)
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printf(" ether %s", etheraddr_string(bp->bp_chaddr));
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}
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TCHECK2(bp->bp_sname[0], 1); /* check first char only */
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if (*bp->bp_sname) {
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printf(" sname \"");
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if (fn_print(bp->bp_sname, snapend)) {
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putchar('"');
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fputs(tstr + 1, stdout);
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return;
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}
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}
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TCHECK2(bp->bp_sname[0], 1); /* check first char only */
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if (*bp->bp_file) {
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printf(" file \"");
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if (fn_print(bp->bp_file, snapend)) {
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putchar('"');
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fputs(tstr + 1, stdout);
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return;
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}
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}
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/* Decode the vendor buffer */
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TCHECK(bp->bp_vend[0]);
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length -= sizeof(*bp) - sizeof(bp->bp_vend);
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if (memcmp((char *)bp->bp_vend, (char *)vm_rfc1048,
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sizeof(u_int32_t)) == 0)
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rfc1048_print(bp->bp_vend, length);
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else if (memcmp((char *)bp->bp_vend, (char *)vm_cmu,
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sizeof(u_int32_t)) == 0)
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cmu_print(bp->bp_vend, length);
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else {
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u_int32_t ul;
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memcpy((char *)&ul, (char *)bp->bp_vend, sizeof(ul));
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if (ul != 0)
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printf("vend-#0x%x", ul);
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}
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return;
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trunc:
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fputs(tstr, stdout);
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}
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/* The first character specifies the format to print */
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static struct tok tag2str[] = {
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/* RFC1048 tags */
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{ TAG_PAD, " PAD" },
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{ TAG_SUBNET_MASK, "iSM" }, /* subnet mask (RFC950) */
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{ TAG_TIME_OFFSET, "lTZ" }, /* seconds from UTC */
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{ TAG_GATEWAY, "iDG" }, /* default gateway */
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{ TAG_TIME_SERVER, "iTS" }, /* time servers (RFC868) */
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{ TAG_NAME_SERVER, "iIEN" }, /* IEN name servers (IEN116) */
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{ TAG_DOMAIN_SERVER, "iNS" }, /* domain name (RFC1035) */
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{ TAG_LOG_SERVER, "iLOG" }, /* MIT log servers */
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{ TAG_COOKIE_SERVER, "iCS" }, /* cookie servers (RFC865) */
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{ TAG_LPR_SERVER, "iLPR" }, /* lpr server (RFC1179) */
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{ TAG_IMPRESS_SERVER, "iIM" }, /* impress servers (Imagen) */
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{ TAG_RLP_SERVER, "iRL" }, /* resource location (RFC887) */
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{ TAG_HOSTNAME, "aHN" }, /* ascii hostname */
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{ TAG_BOOTSIZE, "sBS" }, /* 512 byte blocks */
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{ TAG_END, " END" },
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/* RFC1497 tags */
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{ TAG_DUMPPATH, "aDP" },
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{ TAG_DOMAINNAME, "aDN" },
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{ TAG_SWAP_SERVER, "iSS" },
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{ TAG_ROOTPATH, "aRP" },
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{ TAG_EXTPATH, "aEP" },
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{ 0, NULL }
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};
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static void
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rfc1048_print(register const u_char *bp, register u_int length)
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{
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register u_char tag;
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register u_int len, size;
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register const char *cp;
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register char c;
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int first;
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u_int32_t ul;
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u_short us;
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printf(" vend-rfc1048");
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/* Step over magic cookie */
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bp += sizeof(int32_t);
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/* Loop while we there is a tag left in the buffer */
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while (bp + 1 < snapend) {
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tag = *bp++;
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if (tag == TAG_PAD)
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continue;
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if (tag == TAG_END)
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return;
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cp = tok2str(tag2str, "?T%d", tag);
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c = *cp++;
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printf(" %s:", cp);
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/* Get the length; check for truncation */
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if (bp + 1 >= snapend) {
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fputs(tstr, stdout);
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return;
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}
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len = *bp++;
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if (bp + len >= snapend) {
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fputs(tstr, stdout);
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return;
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}
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/* Print data */
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size = len;
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if (c == '?') {
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/* Base default formats for unknown tags on data size */
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if (size & 1)
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c = 'b';
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else if (size & 2)
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c = 's';
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else
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c = 'l';
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}
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first = 1;
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switch (c) {
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case 'a':
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/* ascii strings */
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putchar('"');
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(void)fn_printn(bp, size, NULL);
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putchar('"');
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bp += size;
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size = 0;
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break;
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case 'i':
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case 'l':
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/* ip addresses/32-bit words */
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while (size >= sizeof(ul)) {
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if (!first)
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putchar(',');
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memcpy((char *)&ul, (char *)bp, sizeof(ul));
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if (c == 'i')
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printf("%s", ipaddr_string(&ul));
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else
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printf("%u", ul);
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bp += sizeof(ul);
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size -= sizeof(ul);
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first = 0;
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}
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break;
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case 's':
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/* shorts */
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while (size >= sizeof(us)) {
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if (!first)
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putchar(',');
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memcpy((char *)&us, (char *)bp, sizeof(us));
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printf("%d", us);
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bp += sizeof(us);
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size -= sizeof(us);
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first = 0;
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}
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break;
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case 'b':
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default:
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/* Bytes */
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while (size > 0) {
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if (!first)
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putchar('.');
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printf("%d", *bp);
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++bp;
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--size;
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first = 0;
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}
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break;
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}
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/* Data left over? */
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if (size)
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printf("[len %d]", len);
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}
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}
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static void
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cmu_print(register const u_char *bp, register u_int length)
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{
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register const struct cmu_vend *cmu;
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char *fmt = " %s:%s";
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#define PRINTCMUADDR(m, s) { TCHECK(cmu->m); \
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if (cmu->m.s_addr != 0) \
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printf(fmt, s, ipaddr_string(&cmu->m.s_addr)); }
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printf(" vend-cmu");
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cmu = (struct cmu_vend *)bp;
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/* Only print if there are unknown bits */
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TCHECK(cmu->v_flags);
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if ((cmu->v_flags & ~(VF_SMASK)) != 0)
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printf(" F:0x%x", cmu->v_flags);
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PRINTCMUADDR(v_dgate, "DG");
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PRINTCMUADDR(v_smask, cmu->v_flags & VF_SMASK ? "SM" : "SM*");
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PRINTCMUADDR(v_dns1, "NS1");
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PRINTCMUADDR(v_dns2, "NS2");
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PRINTCMUADDR(v_ins1, "IEN1");
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PRINTCMUADDR(v_ins2, "IEN2");
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PRINTCMUADDR(v_ts1, "TS1");
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PRINTCMUADDR(v_ts2, "TS2");
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return;
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trunc:
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fputs(tstr, stdout);
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#undef PRINTCMUADDR
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}
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