| /* |
| * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997 |
| * 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 const char rcsid[] = |
| "@(#) $Header: /tcpdump/master/tcpdump/print-bootp.c,v 1.48 1999-11-21 09:36:49 fenner Exp $ (LBL)"; |
| #endif |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <sys/param.h> |
| #include <sys/time.h> |
| #include <sys/socket.h> |
| |
| #if __STDC__ |
| struct mbuf; |
| struct rtentry; |
| #endif |
| #include <net/if.h> |
| |
| #include <netinet/in.h> |
| #include <netinet/if_ether.h> |
| |
| #include <ctype.h> |
| #ifdef HAVE_MEMORY_H |
| #include <memory.h> |
| #endif |
| #include <stdio.h> |
| #include <string.h> |
| |
| #include "interface.h" |
| #include "addrtoname.h" |
| #include "bootp.h" |
| |
| static void rfc1048_print(const u_char *, u_int); |
| static void cmu_print(const u_char *, u_int); |
| |
| static char tstr[] = " [|bootp]"; |
| |
| /* |
| * Print bootp requests |
| */ |
| void |
| bootp_print(register const u_char *cp, u_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; |
| |
| bp = (struct bootp *)cp; |
| TCHECK(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); |
| |
| /* 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", (u_int32_t)ntohl(bp->bp_xid)); |
| if (bp->bp_secs) |
| printf(" secs:%d", ntohs(bp->bp_secs)); |
| if (bp->bp_flags) |
| printf(" flags:0x%x", ntohs(bp->bp_flags)); |
| |
| /* Client's ip address */ |
| TCHECK(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); |
| if (bp->bp_yiaddr.s_addr) |
| printf(" Y:%s", ipaddr_string(&bp->bp_yiaddr)); |
| |
| /* Server's ip address */ |
| TCHECK(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); |
| 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; |
| |
| TCHECK2(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 || memcmp((char *)bp->bp_chaddr, e, 6) != 0) |
| printf(" ether %s", etheraddr_string(bp->bp_chaddr)); |
| } |
| |
| TCHECK2(bp->bp_sname[0], 1); /* check first char only */ |
| if (*bp->bp_sname) { |
| printf(" sname \""); |
| if (fn_print(bp->bp_sname, snapend)) { |
| putchar('"'); |
| fputs(tstr + 1, stdout); |
| return; |
| } |
| putchar('"'); |
| } |
| TCHECK2(bp->bp_sname[0], 1); /* check first char only */ |
| if (*bp->bp_file) { |
| printf(" file \""); |
| if (fn_print(bp->bp_file, snapend)) { |
| putchar('"'); |
| fputs(tstr + 1, stdout); |
| return; |
| } |
| putchar('"'); |
| } |
| |
| /* Decode the vendor buffer */ |
| TCHECK(bp->bp_vend[0]); |
| length -= sizeof(*bp) - sizeof(bp->bp_vend); |
| if (memcmp((char *)bp->bp_vend, (char *)vm_rfc1048, |
| sizeof(u_int32_t)) == 0) |
| rfc1048_print(bp->bp_vend, length); |
| else if (memcmp((char *)bp->bp_vend, (char *)vm_cmu, |
| sizeof(u_int32_t)) == 0) |
| cmu_print(bp->bp_vend, length); |
| else { |
| u_int32_t ul; |
| |
| memcpy((char *)&ul, (char *)bp->bp_vend, sizeof(ul)); |
| if (ul != 0) |
| printf("vend-#0x%x", ul); |
| } |
| |
| return; |
| trunc: |
| fputs(tstr, stdout); |
| } |
| |
| /* The first character specifies the format to print */ |
| static struct tok 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" }, |
| /* RFC2132 tags */ |
| { TAG_IP_FORWARD, "BIPF" }, |
| { TAG_NL_SRCRT, "BSRT" }, |
| { TAG_PFILTERS, "pPF" }, |
| { TAG_REASS_SIZE, "sRSZ" }, |
| { TAG_DEF_TTL, "bTTL" }, |
| { TAG_MTU_TIMEOUT, "lMA" }, |
| { TAG_MTU_TABLE, "sMT" }, |
| { TAG_INT_MTU, "sMTU" }, |
| { TAG_LOCAL_SUBNETS, "BLSN" }, |
| { TAG_BROAD_ADDR, "iBR" }, |
| { TAG_DO_MASK_DISC, "BMD" }, |
| { TAG_SUPPLY_MASK, "BMS" }, |
| { TAG_DO_RDISC, "BRD" }, |
| { TAG_RTR_SOL_ADDR, "iRSA" }, |
| { TAG_STATIC_ROUTE, "pSR" }, |
| { TAG_USE_TRAILERS, "BUT" }, |
| { TAG_ARP_TIMEOUT, "lAT" }, |
| { TAG_ETH_ENCAP, "BIE" }, |
| { TAG_TCP_TTL, "bTT" }, |
| { TAG_TCP_KEEPALIVE, "lKI" }, |
| { TAG_KEEPALIVE_GO, "BKG" }, |
| { TAG_NIS_DOMAIN, "aYD" }, |
| { TAG_NIS_SERVERS, "iYS" }, |
| { TAG_NTP_SERVERS, "iNTP" }, |
| { TAG_VENDOR_OPTS, "bVO" }, |
| { TAG_NETBIOS_NS, "iWNS" }, |
| { TAG_NETBIOS_DDS, "iWDD" }, |
| { TAG_NETBIOS_NODE, "bWNT" }, |
| { TAG_NETBIOS_SCOPE, "aWSC" }, |
| { TAG_XWIN_FS, "iXFS" }, |
| { TAG_XWIN_DM, "iXDM" }, |
| { TAG_NIS_P_DOMAIN, "sN+D" }, |
| { TAG_NIS_P_SERVERS, "iN+S" }, |
| { TAG_MOBILE_HOME, "iMH" }, |
| { TAG_SMPT_SERVER, "iSMTP" }, |
| { TAG_POP3_SERVER, "iPOP3" }, |
| { TAG_NNTP_SERVER, "iNNTP" }, |
| { TAG_WWW_SERVER, "iWWW" }, |
| { TAG_FINGER_SERVER, "iFG" }, |
| { TAG_IRC_SERVER, "iIRC" }, |
| { TAG_STREETTALK_SRVR, "iSTS" }, |
| { TAG_STREETTALK_STDA, "iSTDA" }, |
| { TAG_REQUESTED_IP, "iRQ" }, |
| { TAG_IP_LEASE, "lLT" }, |
| { TAG_OPT_OVERLOAD, "bOO" }, |
| { TAG_TFTP_SERVER, "aTFTP" }, |
| { TAG_BOOTFILENAME, "aBF" }, |
| { TAG_DHCP_MESSAGE, " DHCP" }, |
| { TAG_SERVER_ID, "iSID" }, |
| { TAG_PARM_REQUEST, "bPR" }, |
| { TAG_MESSAGE, "aMSG" }, |
| { TAG_MAX_MSG_SIZE, "sMSZ" }, |
| { TAG_RENEWAL_TIME, "lRN" }, |
| { TAG_REBIND_TIME, "lRB" }, |
| { TAG_VENDOR_CLASS, "bVC" }, |
| { TAG_CLIENT_ID, "bCID" }, |
| { 0, NULL } |
| }; |
| |
| static void |
| rfc1048_print(register const u_char *bp, register u_int length) |
| { |
| register u_char tag; |
| register u_int len, size; |
| register const char *cp; |
| register char c; |
| int first; |
| u_int32_t ul; |
| u_short us; |
| |
| printf(" vend-rfc1048"); |
| |
| /* Step over magic cookie */ |
| bp += sizeof(int32_t); |
| |
| /* Loop while we there is a tag left in the buffer */ |
| while (bp + 1 < snapend) { |
| 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 >= snapend) { |
| fputs(tstr, stdout); |
| return; |
| } |
| len = *bp++; |
| if (bp + len >= snapend) { |
| fputs(tstr, stdout); |
| return; |
| } |
| |
| if (tag == TAG_DHCP_MESSAGE && len == 1) { |
| c = *bp++; |
| switch (c) { |
| case DHCPDISCOVER: printf("DISCOVER"); break; |
| case DHCPOFFER: printf("OFFER"); break; |
| case DHCPREQUEST: printf("REQUEST"); break; |
| case DHCPDECLINE: printf("DECLINE"); break; |
| case DHCPACK: printf("ACK"); break; |
| case DHCPNAK: printf("NACK"); break; |
| case DHCPRELEASE: printf("RELEASE"); break; |
| case DHCPINFORM: printf("INFORM"); break; |
| default: printf("%u", c); break; |
| } |
| continue; |
| } |
| |
| if (tag == TAG_PARM_REQUEST) { |
| first = 1; |
| while (len-- > 0) { |
| c = *bp++; |
| cp = tok2str(tag2str, "?%d", c); |
| if (!first) |
| putchar('+'); |
| printf("%s", cp + 1); |
| first = 0; |
| } |
| continue; |
| } |
| |
| /* 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 */ |
| putchar('"'); |
| (void)fn_printn(bp, size, NULL); |
| putchar('"'); |
| bp += size; |
| size = 0; |
| break; |
| |
| case 'i': |
| case 'l': |
| /* ip addresses/32-bit words */ |
| while (size >= sizeof(ul)) { |
| if (!first) |
| putchar(','); |
| memcpy((char *)&ul, (char *)bp, sizeof(ul)); |
| if (c == 'i') |
| printf("%s", ipaddr_string(&ul)); |
| else |
| printf("%u", ul); |
| bp += sizeof(ul); |
| size -= sizeof(ul); |
| first = 0; |
| } |
| break; |
| |
| case 'p': |
| /* IP address pairs */ |
| while (size >= 2*sizeof(ul)) { |
| if (!first) |
| putchar(','); |
| memcpy((char *)&ul, (char *)bp, sizeof(ul)); |
| printf("(%s:", ipaddr_string(&ul)); |
| bp += sizeof(ul); |
| memcpy((char *)&ul, (char *)bp, sizeof(ul)); |
| printf("%s)", ipaddr_string(&ul)); |
| bp += sizeof(ul); |
| size -= 2*sizeof(ul); |
| first = 0; |
| } |
| break; |
| |
| case 's': |
| /* shorts */ |
| while (size >= sizeof(us)) { |
| if (!first) |
| putchar(','); |
| memcpy((char *)&us, (char *)bp, sizeof(us)); |
| printf("%d", us); |
| bp += sizeof(us); |
| size -= sizeof(us); |
| first = 0; |
| } |
| break; |
| |
| case 'B': |
| /* boolean */ |
| while (size > 0) { |
| if (!first) |
| putchar(','); |
| switch (*bp) { |
| case 0: |
| putchar('N'); |
| break; |
| case 1: |
| putchar('Y'); |
| break; |
| default: |
| printf("%d?", *bp); |
| break; |
| } |
| ++bp; |
| --size; |
| 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 u_int length) |
| { |
| register const struct cmu_vend *cmu; |
| char *fmt = " %s:%s"; |
| |
| #define PRINTCMUADDR(m, s) { TCHECK(cmu->m); \ |
| if (cmu->m.s_addr != 0) \ |
| printf(fmt, s, ipaddr_string(&cmu->m.s_addr)); } |
| |
| printf(" vend-cmu"); |
| cmu = (struct cmu_vend *)bp; |
| |
| /* Only print if there are unknown bits */ |
| TCHECK(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 PRINTCMUADDR |
| } |