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- /*
- * Copyright (c) 1990, 1991, 1993, 1994
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that: (1) source code distributions
- * retain the above copyright notice and this paragraph in its entirety, (2)
- * distributions including binary code include the above copyright notice and
- * this paragraph in its entirety in the documentation or other materials
- * provided with the distribution, and (3) all advertising materials mentioning
- * features or use of this software display the following acknowledgement:
- * ``This product includes software developed by the University of California,
- * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
- * the University nor the names of its contributors may be used to endorse
- * or promote products derived from this software without specific prior
- * written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- *
- * Format and print bootp packets.
- */
- #ifndef lint
- static char rcsid[] =
- "@(#) $Header: print-bootp.c,v 1.30 94/06/14 20:17:37 leres Exp $ (LBL)";
- #endif
-
- #include <sys/param.h>
- #include <sys/time.h>
- #include <sys/types.h>
- #include <sys/socket.h>
-
- #include <net/if.h>
-
- #include <netinet/in.h>
- #include <netinet/if_ether.h>
-
- #include <ctype.h>
- #include <string.h>
- #include <stdio.h>
-
- #include "interface.h"
- #include "addrtoname.h"
- #include "bootp.h"
-
- static void rfc1048_print(const u_char *, int);
- static void cmu_print(const u_char *, int);
-
- static char tstr[] = " [|bootp]";
-
- /*
- * Print bootp requests
- */
- void
- bootp_print(register const u_char *cp, int length,
- u_short sport, u_short dport)
- {
- register const struct bootp *bp;
- static u_char vm_cmu[4] = VM_CMU;
- static u_char vm_rfc1048[4] = VM_RFC1048;
- const u_char *ep;
-
- #define TCHECK(var, l) if ((u_char *)&(var) > ep - l) goto trunc
-
- bp = (struct bootp *)cp;
- /* 'ep' points to the end of avaible data. */
- ep = snapend;
-
- TCHECK(bp->bp_op, sizeof(bp->bp_op));
- switch (bp->bp_op) {
-
- case BOOTREQUEST:
- /* Usually, a request goes from a client to a server */
- if (sport != IPPORT_BOOTPC || dport != IPPORT_BOOTPS)
- printf(" (request)");
- break;
-
- case BOOTREPLY:
- /* Usually, a reply goes from a server to a client */
- if (sport != IPPORT_BOOTPS || dport != IPPORT_BOOTPC)
- printf(" (reply)");
- break;
-
- default:
- printf(" bootp-#%d", bp->bp_op);
- }
-
- TCHECK(bp->bp_secs, sizeof(bp->bp_secs));
-
- /* The usual hardware address type is 1 (10Mb Ethernet) */
- if (bp->bp_htype != 1)
- printf(" htype-#%d", bp->bp_htype);
-
- /* The usual length for 10Mb Ethernet address is 6 bytes */
- if (bp->bp_htype != 1 || bp->bp_hlen != 6)
- printf(" hlen:%d", bp->bp_hlen);
-
- /* Only print interesting fields */
- if (bp->bp_hops)
- printf(" hops:%d", bp->bp_hops);
- if (bp->bp_xid)
- printf(" xid:0x%x", ntohl(bp->bp_xid));
- if (bp->bp_secs)
- printf(" secs:%d", ntohs(bp->bp_secs));
-
- /* Client's ip address */
- TCHECK(bp->bp_ciaddr, sizeof(bp->bp_ciaddr));
- if (bp->bp_ciaddr.s_addr)
- printf(" C:%s", ipaddr_string(&bp->bp_ciaddr));
-
- /* 'your' ip address (bootp client) */
- TCHECK(bp->bp_yiaddr, sizeof(bp->bp_yiaddr));
- if (bp->bp_yiaddr.s_addr)
- printf(" Y:%s", ipaddr_string(&bp->bp_yiaddr));
-
- /* Server's ip address */
- TCHECK(bp->bp_siaddr, sizeof(bp->bp_siaddr));
- if (bp->bp_siaddr.s_addr)
- printf(" S:%s", ipaddr_string(&bp->bp_siaddr));
-
- /* Gateway's ip address */
- TCHECK(bp->bp_giaddr, sizeof(bp->bp_giaddr));
- if (bp->bp_giaddr.s_addr)
- printf(" G:%s", ipaddr_string(&bp->bp_giaddr));
-
- /* Client's Ethernet address */
- if (bp->bp_htype == 1 && bp->bp_hlen == 6) {
- register const struct ether_header *eh;
- register const char *e;
-
- TCHECK(bp->bp_chaddr[0], 6);
- eh = (struct ether_header *)packetp;
- if (bp->bp_op == BOOTREQUEST)
- e = (const char *)ESRC(eh);
- else if (bp->bp_op == BOOTREPLY)
- e = (const char *)EDST(eh);
- else
- e = 0;
- if (e == 0 || bcmp((char *)bp->bp_chaddr, e, 6) != 0)
- printf(" ether %s", etheraddr_string(bp->bp_chaddr));
- }
-
- TCHECK(bp->bp_sname[0], 1); /* check first char only */
- if (*bp->bp_sname) {
- printf(" sname ");
- if (fn_print(bp->bp_sname, ep)) {
- fputs(tstr + 1, stdout);
- return;
- }
- }
- TCHECK(bp->bp_sname[0], 1); /* check first char only */
- if (*bp->bp_file) {
- printf(" file ");
- if (fn_print(bp->bp_file, ep)) {
- fputs(tstr + 1, stdout);
- return;
- }
- }
-
- /* Decode the vendor buffer */
- TCHECK(bp->bp_vend[0], sizeof(bp->bp_vend));
- length -= sizeof(*bp) - sizeof(bp->bp_vend);
- if (bcmp((char *)bp->bp_vend, (char *)vm_rfc1048,
- sizeof(u_int32)) == 0)
- rfc1048_print(bp->bp_vend, length);
- else if (bcmp((char *)bp->bp_vend, (char *)vm_cmu,
- sizeof(u_int32)) == 0)
- cmu_print(bp->bp_vend, length);
- else {
- u_int32 ul;
-
- bcopy((char *)bp->bp_vend, (char *)&ul, sizeof(ul));
- if (ul != 0)
- printf("vend-#0x%x", ul);
- }
-
- return;
- trunc:
- fputs(tstr, stdout);
- #undef TCHECK
- }
-
- /* The first character specifies the format to print */
- static struct token tag2str[] = {
- /* RFC1048 tags */
- { TAG_PAD, " PAD" },
- { TAG_SUBNET_MASK, "iSM" }, /* subnet mask (RFC950) */
- { TAG_TIME_OFFSET, "lTZ" }, /* seconds from UTC */
- { TAG_GATEWAY, "iDG" }, /* default gateway */
- { TAG_TIME_SERVER, "iTS" }, /* time servers (RFC868) */
- { TAG_NAME_SERVER, "iIEN" }, /* IEN name servers (IEN116) */
- { TAG_DOMAIN_SERVER, "iNS" }, /* domain name (RFC1035) */
- { TAG_LOG_SERVER, "iLOG" }, /* MIT log servers */
- { TAG_COOKIE_SERVER, "iCS" }, /* cookie servers (RFC865) */
- { TAG_LPR_SERVER, "iLPR" }, /* lpr server (RFC1179) */
- { TAG_IMPRESS_SERVER, "iIM" }, /* impress servers (Imagen) */
- { TAG_RLP_SERVER, "iRL" }, /* resource location (RFC887) */
- { TAG_HOSTNAME, "aHN" }, /* ascii hostname */
- { TAG_BOOTSIZE, "sBS" }, /* 512 byte blocks */
- { TAG_END, " END" },
- /* RFC1497 tags */
- { TAG_DUMPPATH, "aDP" },
- { TAG_DOMAINNAME, "aDN" },
- { TAG_SWAP_SERVER, "iSS" },
- { TAG_ROOTPATH, "aRP" },
- { TAG_EXTPATH, "aEP" },
- { 0, NULL }
- };
-
- static void
- rfc1048_print(register const u_char *bp, register int length)
- {
- register u_char tag;
- register const u_char *ep;
- register u_int len, size;
- register const char *cp;
- register char c;
- int first;
- u_int32 ul;
- u_short us;
-
- printf(" vend-rfc1048");
-
- /* Setup end pointer */
- ep = bp + length;
-
- /* Step over magic cookie */
- bp += sizeof(int32);
-
- /* Loop while we there is a tag left in the buffer */
- while (bp + 1 < ep) {
- tag = *bp++;
- if (tag == TAG_PAD)
- continue;
- if (tag == TAG_END)
- return;
- cp = tok2str(tag2str, "?T%d", tag);
- c = *cp++;
- printf(" %s:", cp);
-
- /* Get the length; check for truncation */
- if (bp + 1 >= ep) {
- fputs(tstr, stdout);
- return;
- }
- len = *bp++;
- if (bp + len >= ep) {
- fputs(tstr, stdout);
- return;
- }
-
- /* Print data */
- size = len;
- if (c == '?') {
- /* Base default formats for unknown tags on data size */
- if (size & 1)
- c = 'b';
- else if (size & 2)
- c = 's';
- else
- c = 'l';
- }
- first = 1;
- switch (c) {
-
- case 'a':
- /* ascii strings */
- (void)fn_printn(bp, size, NULL);
- bp += size;
- size = 0;
- break;
-
- case 'i':
- case 'l':
- /* ip addresses/32-bit words */
- while (size >= sizeof(ul)) {
- if (!first)
- putchar(',');
- bcopy((char *)bp, (char *)&ul, sizeof(ul));
- if (c == 'i')
- printf("%s", ipaddr_string(&ul));
- else
- printf("%lu", ul);
- bp += sizeof(ul);
- size -= sizeof(ul);
- first = 0;
- }
- break;
-
- case 's':
- /* shorts */
- while (size >= sizeof(us)) {
- if (!first)
- putchar(',');
- bcopy((char *)bp, (char *)&us, sizeof(us));
- printf("%d", us);
- bp += sizeof(us);
- size -= sizeof(us);
- first = 0;
- }
- break;
-
- case 'b':
- default:
- /* Bytes */
- while (size > 0) {
- if (!first)
- putchar('.');
- printf("%d", *bp);
- ++bp;
- --size;
- first = 0;
- }
- break;
- }
- /* Data left over? */
- if (size)
- printf("[len %d]", len);
- }
- }
-
- static void
- cmu_print(register const u_char *bp, register int length)
- {
- register const struct cmu_vend *cmu;
- register const u_char *ep;
- char *fmt = " %s:%s";
-
- #define TCHECK(var, l) if ((u_char *)&(var) > ep - l) goto trunc
- #define PRINTCMUADDR(m, s) { TCHECK(cmu->m, sizeof(cmu->m)); \
- if (cmu->m.s_addr != 0) \
- printf(fmt, s, ipaddr_string(&cmu->m.s_addr)); }
-
- /* Setup end pointer */
- ep = bp + length;
-
- printf(" vend-cmu");
- cmu = (struct cmu_vend *)bp;
-
- /* Only print if there are unknown bits */
- TCHECK(cmu->v_flags, sizeof(cmu->v_flags));
- if ((cmu->v_flags & ~(VF_SMASK)) != 0)
- printf(" F:0x%x", cmu->v_flags);
- PRINTCMUADDR(v_dgate, "DG");
- PRINTCMUADDR(v_smask, cmu->v_flags & VF_SMASK ? "SM" : "SM*");
- PRINTCMUADDR(v_dns1, "NS1");
- PRINTCMUADDR(v_dns2, "NS2");
- PRINTCMUADDR(v_ins1, "IEN1");
- PRINTCMUADDR(v_ins2, "IEN2");
- PRINTCMUADDR(v_ts1, "TS1");
- PRINTCMUADDR(v_ts2, "TS2");
- return;
-
- trunc:
- fputs(tstr, stdout);
- #undef TCHECK
- #undef PRINTCMUADDR
- }
-