266 lines
6.3 KiB
C
266 lines
6.3 KiB
C
/*
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* Copyright (c) 1988-1990 The Regents of the University of California.
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* 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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* $Id: print-bootp.c,v 1.1 1993/11/14 21:20:35 deraadt Exp $
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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 1.17 91/11/14 22:21:34 leres Exp (LBL)";
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#endif
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#include <stdio.h>
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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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 <strings.h>
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#include <ctype.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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void rfc1048_print();
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void cmu_print();
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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(bp, length, sport, dport)
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register struct bootp *bp;
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int length;
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u_short sport, dport;
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{
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static char tstr[] = " [|bootp]";
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static unsigned char vm_cmu[4] = VM_CMU;
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static unsigned char vm_rfc1048[4] = VM_RFC1048;
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u_char *ep;
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#define TCHECK(var, l) if ((u_char *)&(var) > ep - l) goto trunc
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/* Note funny sized packets */
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if (length != sizeof(struct bootp))
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(void)printf(" [len=%d]", length);
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/* 'ep' points to the end of avaible data. */
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ep = (u_char *)snapend;
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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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NTOHL(bp->bp_xid);
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NTOHS(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", bp->bp_xid);
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if (bp->bp_secs)
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printf(" secs:%d", bp->bp_secs);
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/* Client's ip address */
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TCHECK(bp->bp_ciaddr, sizeof(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, sizeof(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, sizeof(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, sizeof(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 struct ether_header *eh;
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register char *e;
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TCHECK(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 = (char *)ESRC(eh);
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else if (bp->bp_op == BOOTREPLY)
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e = (char *)EDST(eh);
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else
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e = 0;
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if (e == 0 || bcmp((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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TCHECK(bp->bp_sname[0], sizeof(bp->bp_sname));
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if (*bp->bp_sname) {
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printf(" sname ");
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if (printfn(bp->bp_sname, ep)) {
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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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TCHECK(bp->bp_file[0], sizeof(bp->bp_file));
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if (*bp->bp_file) {
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printf(" file ");
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if (printfn(bp->bp_file, ep)) {
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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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/* Don't try to decode the vendor buffer unless we're verbose */
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if (vflag <= 0)
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return;
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TCHECK(bp->bp_vend[0], sizeof(bp->bp_vend));
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printf(" vend");
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if (bcmp(bp->bp_vend, vm_rfc1048, sizeof(u_long)) == 0)
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rfc1048_print(bp->bp_vend, sizeof(bp->bp_vend));
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else if (bcmp(bp->bp_vend, vm_cmu, sizeof(u_long)) == 0)
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cmu_print(bp->bp_vend, sizeof(bp->bp_vend));
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else {
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u_long ul;
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bcopy((char *)bp->bp_vend, (char *)&ul, sizeof(ul));
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printf("-#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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#undef TCHECK
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}
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void
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rfc1048_print(bp, length)
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register u_char *bp;
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int length;
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{
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u_char tag;
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u_char *ep;
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register int i;
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u_long ul;
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printf("-rfc1048");
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/* Step over magic cookie */
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bp += sizeof(long);
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/* Setup end pointer */
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ep = bp + length;
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while (bp < ep) {
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tag = *bp++;
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i = *bp++;
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switch (tag) {
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case TAG_PAD:
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/* no-op */
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break;
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case TAG_SUBNET_MASK:
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ul = 0;
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bcopy((char *)bp, (char *)&ul, i);
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printf(" SM:%s", ipaddr_string(&ul));
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break;
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case TAG_TIME_SERVER:
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ul = 0;
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bcopy((char *)bp, (char *)&ul, i);
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printf(" TS:%s", ipaddr_string(&ul));
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break;
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case TAG_GATEWAY:
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ul = 0;
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bcopy((char *)bp, (char *)&ul, i);
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printf(" G:%s", ipaddr_string(&ul));
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break;
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case TAG_TIME_OFFSET:
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case TAG_NAME_SERVER:
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case TAG_DOMAIN_SERVER:
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case TAG_LOG_SERVER:
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case TAG_COOKIE_SERVER:
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case TAG_LPR_SERVER:
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case TAG_IMPRESS_SERVER:
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case TAG_RLP_SERVER:
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case TAG_HOSTNAME:
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case TAG_BOOTSIZE:
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printf(" tag-#%d", tag);
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if (i == sizeof(long)) {
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bcopy((char *)bp, (char *)&ul, sizeof(long));
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printf(":0x%x", ul);
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} else
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printf(":?");
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break;
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case TAG_END:
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return;
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default:
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printf("[tag-#%d]", tag);
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return;
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}
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}
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}
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void
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cmu_print(bp, length)
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register u_char *bp;
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int length;
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{
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/* XXX not really implemented */
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printf("-cmu [...]");
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}
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