| /* |
| * 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. |
| */ |
| |
| /* \summary: BOOTP and IPv4 DHCP printer */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <netdissect-stdinc.h> |
| |
| #include <string.h> |
| |
| #include "netdissect.h" |
| #include "addrtoname.h" |
| #include "extract.h" |
| |
| static const char tstr[] = " [|bootp]"; |
| |
| /* |
| * Bootstrap Protocol (BOOTP). RFC951 and RFC1048. |
| * |
| * This file specifies the "implementation-independent" BOOTP protocol |
| * information which is common to both client and server. |
| * |
| * Copyright 1988 by Carnegie Mellon. |
| * |
| * Permission to use, copy, modify, and distribute this program for any |
| * purpose and without fee is hereby granted, provided that this copyright |
| * and permission notice appear on all copies and supporting documentation, |
| * the name of Carnegie Mellon not be used in advertising or publicity |
| * pertaining to distribution of the program without specific prior |
| * permission, and notice be given in supporting documentation that copying |
| * and distribution is by permission of Carnegie Mellon and Stanford |
| * University. Carnegie Mellon makes no representations about the |
| * suitability of this software for any purpose. It is provided "as is" |
| * without express or implied warranty. |
| */ |
| |
| struct bootp { |
| uint8_t bp_op; /* packet opcode type */ |
| uint8_t bp_htype; /* hardware addr type */ |
| uint8_t bp_hlen; /* hardware addr length */ |
| uint8_t bp_hops; /* gateway hops */ |
| uint32_t bp_xid; /* transaction ID */ |
| uint16_t bp_secs; /* seconds since boot began */ |
| uint16_t bp_flags; /* flags - see bootp_flag_values[] |
| in print-bootp.c */ |
| struct in_addr bp_ciaddr; /* client IP address */ |
| struct in_addr bp_yiaddr; /* 'your' IP address */ |
| struct in_addr bp_siaddr; /* server IP address */ |
| struct in_addr bp_giaddr; /* gateway IP address */ |
| uint8_t bp_chaddr[16]; /* client hardware address */ |
| uint8_t bp_sname[64]; /* server host name */ |
| uint8_t bp_file[128]; /* boot file name */ |
| uint8_t bp_vend[64]; /* vendor-specific area */ |
| } UNALIGNED; |
| |
| #define BOOTPREPLY 2 |
| #define BOOTPREQUEST 1 |
| |
| /* |
| * Vendor magic cookie (v_magic) for CMU |
| */ |
| #define VM_CMU "CMU" |
| |
| /* |
| * Vendor magic cookie (v_magic) for RFC1048 |
| */ |
| #define VM_RFC1048 { 99, 130, 83, 99 } |
| |
| /* |
| * RFC1048 tag values used to specify what information is being supplied in |
| * the vendor field of the packet. |
| */ |
| |
| #define TAG_PAD ((uint8_t) 0) |
| #define TAG_SUBNET_MASK ((uint8_t) 1) |
| #define TAG_TIME_OFFSET ((uint8_t) 2) |
| #define TAG_GATEWAY ((uint8_t) 3) |
| #define TAG_TIME_SERVER ((uint8_t) 4) |
| #define TAG_NAME_SERVER ((uint8_t) 5) |
| #define TAG_DOMAIN_SERVER ((uint8_t) 6) |
| #define TAG_LOG_SERVER ((uint8_t) 7) |
| #define TAG_COOKIE_SERVER ((uint8_t) 8) |
| #define TAG_LPR_SERVER ((uint8_t) 9) |
| #define TAG_IMPRESS_SERVER ((uint8_t) 10) |
| #define TAG_RLP_SERVER ((uint8_t) 11) |
| #define TAG_HOSTNAME ((uint8_t) 12) |
| #define TAG_BOOTSIZE ((uint8_t) 13) |
| #define TAG_END ((uint8_t) 255) |
| /* RFC1497 tags */ |
| #define TAG_DUMPPATH ((uint8_t) 14) |
| #define TAG_DOMAINNAME ((uint8_t) 15) |
| #define TAG_SWAP_SERVER ((uint8_t) 16) |
| #define TAG_ROOTPATH ((uint8_t) 17) |
| #define TAG_EXTPATH ((uint8_t) 18) |
| /* RFC2132 */ |
| #define TAG_IP_FORWARD ((uint8_t) 19) |
| #define TAG_NL_SRCRT ((uint8_t) 20) |
| #define TAG_PFILTERS ((uint8_t) 21) |
| #define TAG_REASS_SIZE ((uint8_t) 22) |
| #define TAG_DEF_TTL ((uint8_t) 23) |
| #define TAG_MTU_TIMEOUT ((uint8_t) 24) |
| #define TAG_MTU_TABLE ((uint8_t) 25) |
| #define TAG_INT_MTU ((uint8_t) 26) |
| #define TAG_LOCAL_SUBNETS ((uint8_t) 27) |
| #define TAG_BROAD_ADDR ((uint8_t) 28) |
| #define TAG_DO_MASK_DISC ((uint8_t) 29) |
| #define TAG_SUPPLY_MASK ((uint8_t) 30) |
| #define TAG_DO_RDISC ((uint8_t) 31) |
| #define TAG_RTR_SOL_ADDR ((uint8_t) 32) |
| #define TAG_STATIC_ROUTE ((uint8_t) 33) |
| #define TAG_USE_TRAILERS ((uint8_t) 34) |
| #define TAG_ARP_TIMEOUT ((uint8_t) 35) |
| #define TAG_ETH_ENCAP ((uint8_t) 36) |
| #define TAG_TCP_TTL ((uint8_t) 37) |
| #define TAG_TCP_KEEPALIVE ((uint8_t) 38) |
| #define TAG_KEEPALIVE_GO ((uint8_t) 39) |
| #define TAG_NIS_DOMAIN ((uint8_t) 40) |
| #define TAG_NIS_SERVERS ((uint8_t) 41) |
| #define TAG_NTP_SERVERS ((uint8_t) 42) |
| #define TAG_VENDOR_OPTS ((uint8_t) 43) |
| #define TAG_NETBIOS_NS ((uint8_t) 44) |
| #define TAG_NETBIOS_DDS ((uint8_t) 45) |
| #define TAG_NETBIOS_NODE ((uint8_t) 46) |
| #define TAG_NETBIOS_SCOPE ((uint8_t) 47) |
| #define TAG_XWIN_FS ((uint8_t) 48) |
| #define TAG_XWIN_DM ((uint8_t) 49) |
| #define TAG_NIS_P_DOMAIN ((uint8_t) 64) |
| #define TAG_NIS_P_SERVERS ((uint8_t) 65) |
| #define TAG_MOBILE_HOME ((uint8_t) 68) |
| #define TAG_SMPT_SERVER ((uint8_t) 69) |
| #define TAG_POP3_SERVER ((uint8_t) 70) |
| #define TAG_NNTP_SERVER ((uint8_t) 71) |
| #define TAG_WWW_SERVER ((uint8_t) 72) |
| #define TAG_FINGER_SERVER ((uint8_t) 73) |
| #define TAG_IRC_SERVER ((uint8_t) 74) |
| #define TAG_STREETTALK_SRVR ((uint8_t) 75) |
| #define TAG_STREETTALK_STDA ((uint8_t) 76) |
| /* DHCP options */ |
| #define TAG_REQUESTED_IP ((uint8_t) 50) |
| #define TAG_IP_LEASE ((uint8_t) 51) |
| #define TAG_OPT_OVERLOAD ((uint8_t) 52) |
| #define TAG_TFTP_SERVER ((uint8_t) 66) |
| #define TAG_BOOTFILENAME ((uint8_t) 67) |
| #define TAG_DHCP_MESSAGE ((uint8_t) 53) |
| #define TAG_SERVER_ID ((uint8_t) 54) |
| #define TAG_PARM_REQUEST ((uint8_t) 55) |
| #define TAG_MESSAGE ((uint8_t) 56) |
| #define TAG_MAX_MSG_SIZE ((uint8_t) 57) |
| #define TAG_RENEWAL_TIME ((uint8_t) 58) |
| #define TAG_REBIND_TIME ((uint8_t) 59) |
| #define TAG_VENDOR_CLASS ((uint8_t) 60) |
| #define TAG_CLIENT_ID ((uint8_t) 61) |
| /* RFC 2241 */ |
| #define TAG_NDS_SERVERS ((uint8_t) 85) |
| #define TAG_NDS_TREE_NAME ((uint8_t) 86) |
| #define TAG_NDS_CONTEXT ((uint8_t) 87) |
| /* RFC 2242 */ |
| #define TAG_NDS_IPDOMAIN ((uint8_t) 62) |
| #define TAG_NDS_IPINFO ((uint8_t) 63) |
| /* RFC 2485 */ |
| #define TAG_OPEN_GROUP_UAP ((uint8_t) 98) |
| /* RFC 2563 */ |
| #define TAG_DISABLE_AUTOCONF ((uint8_t) 116) |
| /* RFC 2610 */ |
| #define TAG_SLP_DA ((uint8_t) 78) |
| #define TAG_SLP_SCOPE ((uint8_t) 79) |
| /* RFC 2937 */ |
| #define TAG_NS_SEARCH ((uint8_t) 117) |
| /* RFC 3004 - The User Class Option for DHCP */ |
| #define TAG_USER_CLASS ((uint8_t) 77) |
| /* RFC 3011 */ |
| #define TAG_IP4_SUBNET_SELECT ((uint8_t) 118) |
| /* RFC 3442 */ |
| #define TAG_CLASSLESS_STATIC_RT ((uint8_t) 121) |
| #define TAG_CLASSLESS_STA_RT_MS ((uint8_t) 249) |
| /* RFC 5859 - TFTP Server Address Option for DHCPv4 */ |
| #define TAG_TFTP_SERVER_ADDRESS ((uint8_t) 150) |
| /* ftp://ftp.isi.edu/.../assignments/bootp-dhcp-extensions */ |
| #define TAG_SLP_NAMING_AUTH ((uint8_t) 80) |
| #define TAG_CLIENT_FQDN ((uint8_t) 81) |
| #define TAG_AGENT_CIRCUIT ((uint8_t) 82) |
| #define TAG_AGENT_REMOTE ((uint8_t) 83) |
| #define TAG_AGENT_MASK ((uint8_t) 84) |
| #define TAG_TZ_STRING ((uint8_t) 88) |
| #define TAG_FQDN_OPTION ((uint8_t) 89) |
| #define TAG_AUTH ((uint8_t) 90) |
| #define TAG_VINES_SERVERS ((uint8_t) 91) |
| #define TAG_SERVER_RANK ((uint8_t) 92) |
| #define TAG_CLIENT_ARCH ((uint8_t) 93) |
| #define TAG_CLIENT_NDI ((uint8_t) 94) |
| #define TAG_CLIENT_GUID ((uint8_t) 97) |
| #define TAG_LDAP_URL ((uint8_t) 95) |
| #define TAG_6OVER4 ((uint8_t) 96) |
| /* RFC 4833, TZ codes */ |
| #define TAG_TZ_PCODE ((uint8_t) 100) |
| #define TAG_TZ_TCODE ((uint8_t) 101) |
| #define TAG_IPX_COMPAT ((uint8_t) 110) |
| #define TAG_NETINFO_PARENT ((uint8_t) 112) |
| #define TAG_NETINFO_PARENT_TAG ((uint8_t) 113) |
| #define TAG_URL ((uint8_t) 114) |
| #define TAG_FAILOVER ((uint8_t) 115) |
| #define TAG_EXTENDED_REQUEST ((uint8_t) 126) |
| #define TAG_EXTENDED_OPTION ((uint8_t) 127) |
| #define TAG_MUDURL ((uint8_t) 161) |
| |
| /* DHCP Message types (values for TAG_DHCP_MESSAGE option) */ |
| #define DHCPDISCOVER 1 |
| #define DHCPOFFER 2 |
| #define DHCPREQUEST 3 |
| #define DHCPDECLINE 4 |
| #define DHCPACK 5 |
| #define DHCPNAK 6 |
| #define DHCPRELEASE 7 |
| #define DHCPINFORM 8 |
| |
| /* |
| * "vendor" data permitted for CMU bootp clients. |
| */ |
| |
| struct cmu_vend { |
| uint8_t v_magic[4]; /* magic number */ |
| uint32_t v_flags; /* flags/opcodes, etc. */ |
| struct in_addr v_smask; /* Subnet mask */ |
| struct in_addr v_dgate; /* Default gateway */ |
| struct in_addr v_dns1, v_dns2; /* Domain name servers */ |
| struct in_addr v_ins1, v_ins2; /* IEN-116 name servers */ |
| struct in_addr v_ts1, v_ts2; /* Time servers */ |
| uint8_t v_unused[24]; /* currently unused */ |
| } UNALIGNED; |
| |
| |
| /* v_flags values */ |
| #define VF_SMASK 1 /* Subnet mask field contains valid data */ |
| |
| /* RFC 4702 DHCP Client FQDN Option */ |
| |
| #define CLIENT_FQDN_FLAGS_S 0x01 |
| #define CLIENT_FQDN_FLAGS_O 0x02 |
| #define CLIENT_FQDN_FLAGS_E 0x04 |
| #define CLIENT_FQDN_FLAGS_N 0x08 |
| /* end of original bootp.h */ |
| |
| static void rfc1048_print(netdissect_options *, const u_char *); |
| static void cmu_print(netdissect_options *, const u_char *); |
| static char *client_fqdn_flags(u_int flags); |
| |
| static const struct tok bootp_flag_values[] = { |
| { 0x8000, "Broadcast" }, |
| { 0, NULL} |
| }; |
| |
| static const struct tok bootp_op_values[] = { |
| { BOOTPREQUEST, "Request" }, |
| { BOOTPREPLY, "Reply" }, |
| { 0, NULL} |
| }; |
| |
| /* |
| * Print bootp requests |
| */ |
| void |
| bootp_print(netdissect_options *ndo, |
| register const u_char *cp, u_int length) |
| { |
| register const struct bootp *bp; |
| static const u_char vm_cmu[4] = VM_CMU; |
| static const u_char vm_rfc1048[4] = VM_RFC1048; |
| |
| bp = (const struct bootp *)cp; |
| ND_TCHECK(bp->bp_op); |
| |
| ND_PRINT((ndo, "BOOTP/DHCP, %s", |
| tok2str(bootp_op_values, "unknown (0x%02x)", bp->bp_op))); |
| |
| ND_TCHECK(bp->bp_hlen); |
| if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) { |
| ND_TCHECK2(bp->bp_chaddr[0], 6); |
| ND_PRINT((ndo, " from %s", etheraddr_string(ndo, bp->bp_chaddr))); |
| } |
| |
| ND_PRINT((ndo, ", length %u", length)); |
| |
| if (!ndo->ndo_vflag) |
| return; |
| |
| ND_TCHECK(bp->bp_secs); |
| |
| /* The usual hardware address type is 1 (10Mb Ethernet) */ |
| if (bp->bp_htype != 1) |
| ND_PRINT((ndo, ", htype %d", bp->bp_htype)); |
| |
| /* The usual length for 10Mb Ethernet address is 6 bytes */ |
| if (bp->bp_htype != 1 || bp->bp_hlen != 6) |
| ND_PRINT((ndo, ", hlen %d", bp->bp_hlen)); |
| |
| /* Only print interesting fields */ |
| if (bp->bp_hops) |
| ND_PRINT((ndo, ", hops %d", bp->bp_hops)); |
| if (EXTRACT_32BITS(&bp->bp_xid)) |
| ND_PRINT((ndo, ", xid 0x%x", EXTRACT_32BITS(&bp->bp_xid))); |
| if (EXTRACT_16BITS(&bp->bp_secs)) |
| ND_PRINT((ndo, ", secs %d", EXTRACT_16BITS(&bp->bp_secs))); |
| |
| ND_PRINT((ndo, ", Flags [%s]", |
| bittok2str(bootp_flag_values, "none", EXTRACT_16BITS(&bp->bp_flags)))); |
| if (ndo->ndo_vflag > 1) |
| ND_PRINT((ndo, " (0x%04x)", EXTRACT_16BITS(&bp->bp_flags))); |
| |
| /* Client's ip address */ |
| ND_TCHECK(bp->bp_ciaddr); |
| if (EXTRACT_32BITS(&bp->bp_ciaddr.s_addr)) |
| ND_PRINT((ndo, "\n\t Client-IP %s", ipaddr_string(ndo, &bp->bp_ciaddr))); |
| |
| /* 'your' ip address (bootp client) */ |
| ND_TCHECK(bp->bp_yiaddr); |
| if (EXTRACT_32BITS(&bp->bp_yiaddr.s_addr)) |
| ND_PRINT((ndo, "\n\t Your-IP %s", ipaddr_string(ndo, &bp->bp_yiaddr))); |
| |
| /* Server's ip address */ |
| ND_TCHECK(bp->bp_siaddr); |
| if (EXTRACT_32BITS(&bp->bp_siaddr.s_addr)) |
| ND_PRINT((ndo, "\n\t Server-IP %s", ipaddr_string(ndo, &bp->bp_siaddr))); |
| |
| /* Gateway's ip address */ |
| ND_TCHECK(bp->bp_giaddr); |
| if (EXTRACT_32BITS(&bp->bp_giaddr.s_addr)) |
| ND_PRINT((ndo, "\n\t Gateway-IP %s", ipaddr_string(ndo, &bp->bp_giaddr))); |
| |
| /* Client's Ethernet address */ |
| if (bp->bp_htype == 1 && bp->bp_hlen == 6) { |
| ND_TCHECK2(bp->bp_chaddr[0], 6); |
| ND_PRINT((ndo, "\n\t Client-Ethernet-Address %s", etheraddr_string(ndo, bp->bp_chaddr))); |
| } |
| |
| ND_TCHECK2(bp->bp_sname[0], 1); /* check first char only */ |
| if (*bp->bp_sname) { |
| ND_PRINT((ndo, "\n\t sname \"")); |
| if (fn_printztn(ndo, bp->bp_sname, (u_int)sizeof bp->bp_sname, |
| ndo->ndo_snapend)) { |
| ND_PRINT((ndo, "\"")); |
| ND_PRINT((ndo, "%s", tstr + 1)); |
| return; |
| } |
| ND_PRINT((ndo, "\"")); |
| } |
| ND_TCHECK2(bp->bp_file[0], 1); /* check first char only */ |
| if (*bp->bp_file) { |
| ND_PRINT((ndo, "\n\t file \"")); |
| if (fn_printztn(ndo, bp->bp_file, (u_int)sizeof bp->bp_file, |
| ndo->ndo_snapend)) { |
| ND_PRINT((ndo, "\"")); |
| ND_PRINT((ndo, "%s", tstr + 1)); |
| return; |
| } |
| ND_PRINT((ndo, "\"")); |
| } |
| |
| /* Decode the vendor buffer */ |
| ND_TCHECK(bp->bp_vend[0]); |
| if (memcmp((const char *)bp->bp_vend, vm_rfc1048, |
| sizeof(uint32_t)) == 0) |
| rfc1048_print(ndo, bp->bp_vend); |
| else if (memcmp((const char *)bp->bp_vend, vm_cmu, |
| sizeof(uint32_t)) == 0) |
| cmu_print(ndo, bp->bp_vend); |
| else { |
| uint32_t ul; |
| |
| ul = EXTRACT_32BITS(&bp->bp_vend); |
| if (ul != 0) |
| ND_PRINT((ndo, "\n\t Vendor-#0x%x", ul)); |
| } |
| |
| return; |
| trunc: |
| ND_PRINT((ndo, "%s", tstr)); |
| } |
| |
| /* |
| * The first character specifies the format to print: |
| * i - ip address (32 bits) |
| * p - ip address pairs (32 bits + 32 bits) |
| * l - long (32 bits) |
| * L - unsigned long (32 bits) |
| * s - short (16 bits) |
| * b - period-seperated decimal bytes (variable length) |
| * x - colon-seperated hex bytes (variable length) |
| * a - ascii string (variable length) |
| * B - on/off (8 bits) |
| * $ - special (explicit code to handle) |
| */ |
| static const struct tok tag2str[] = { |
| /* RFC1048 tags */ |
| { TAG_PAD, " PAD" }, |
| { TAG_SUBNET_MASK, "iSubnet-Mask" }, /* subnet mask (RFC950) */ |
| { TAG_TIME_OFFSET, "LTime-Zone" }, /* seconds from UTC */ |
| { TAG_GATEWAY, "iDefault-Gateway" }, /* default gateway */ |
| { TAG_TIME_SERVER, "iTime-Server" }, /* time servers (RFC868) */ |
| { TAG_NAME_SERVER, "iIEN-Name-Server" }, /* IEN name servers (IEN116) */ |
| { TAG_DOMAIN_SERVER, "iDomain-Name-Server" }, /* domain name (RFC1035) */ |
| { TAG_LOG_SERVER, "iLOG" }, /* MIT log servers */ |
| { TAG_COOKIE_SERVER, "iCS" }, /* cookie servers (RFC865) */ |
| { TAG_LPR_SERVER, "iLPR-Server" }, /* lpr server (RFC1179) */ |
| { TAG_IMPRESS_SERVER, "iIM" }, /* impress servers (Imagen) */ |
| { TAG_RLP_SERVER, "iRL" }, /* resource location (RFC887) */ |
| { TAG_HOSTNAME, "aHostname" }, /* ascii hostname */ |
| { TAG_BOOTSIZE, "sBS" }, /* 512 byte blocks */ |
| { TAG_END, " END" }, |
| /* RFC1497 tags */ |
| { TAG_DUMPPATH, "aDP" }, |
| { TAG_DOMAINNAME, "aDomain-Name" }, |
| { 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, "lMTU-Timeout" }, |
| { TAG_MTU_TABLE, "sMTU-Table" }, |
| { TAG_INT_MTU, "sMTU" }, |
| { TAG_LOCAL_SUBNETS, "BLSN" }, |
| { TAG_BROAD_ADDR, "iBR" }, |
| { TAG_DO_MASK_DISC, "BMD" }, |
| { TAG_SUPPLY_MASK, "BMS" }, |
| { TAG_DO_RDISC, "BRouter-Discovery" }, |
| { TAG_RTR_SOL_ADDR, "iRSA" }, |
| { TAG_STATIC_ROUTE, "pStatic-Route" }, |
| { 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, "bVendor-Option" }, |
| { TAG_NETBIOS_NS, "iNetbios-Name-Server" }, |
| { TAG_NETBIOS_DDS, "iWDD" }, |
| { TAG_NETBIOS_NODE, "$Netbios-Node" }, |
| { TAG_NETBIOS_SCOPE, "aNetbios-Scope" }, |
| { TAG_XWIN_FS, "iXFS" }, |
| { TAG_XWIN_DM, "iXDM" }, |
| { TAG_NIS_P_DOMAIN, "sN+D" }, |
| { TAG_NIS_P_SERVERS, "iN+S" }, |
| { TAG_MOBILE_HOME, "iMH" }, |
| { TAG_SMPT_SERVER, "iSMTP" }, |
| { TAG_POP3_SERVER, "iPOP3" }, |
| { TAG_NNTP_SERVER, "iNNTP" }, |
| { TAG_WWW_SERVER, "iWWW" }, |
| { TAG_FINGER_SERVER, "iFG" }, |
| { TAG_IRC_SERVER, "iIRC" }, |
| { TAG_STREETTALK_SRVR, "iSTS" }, |
| { TAG_STREETTALK_STDA, "iSTDA" }, |
| { TAG_REQUESTED_IP, "iRequested-IP" }, |
| { TAG_IP_LEASE, "lLease-Time" }, |
| { TAG_OPT_OVERLOAD, "$OO" }, |
| { TAG_TFTP_SERVER, "aTFTP" }, |
| { TAG_BOOTFILENAME, "aBF" }, |
| { TAG_DHCP_MESSAGE, " DHCP-Message" }, |
| { TAG_SERVER_ID, "iServer-ID" }, |
| { TAG_PARM_REQUEST, "bParameter-Request" }, |
| { TAG_MESSAGE, "aMSG" }, |
| { TAG_MAX_MSG_SIZE, "sMSZ" }, |
| { TAG_RENEWAL_TIME, "lRN" }, |
| { TAG_REBIND_TIME, "lRB" }, |
| { TAG_VENDOR_CLASS, "aVendor-Class" }, |
| { TAG_CLIENT_ID, "$Client-ID" }, |
| /* RFC 2485 */ |
| { TAG_OPEN_GROUP_UAP, "aUAP" }, |
| /* RFC 2563 */ |
| { TAG_DISABLE_AUTOCONF, "BNOAUTO" }, |
| /* RFC 2610 */ |
| { TAG_SLP_DA, "bSLP-DA" }, /*"b" is a little wrong */ |
| { TAG_SLP_SCOPE, "bSLP-SCOPE" }, /*"b" is a little wrong */ |
| /* RFC 2937 */ |
| { TAG_NS_SEARCH, "sNSSEARCH" }, /* XXX 's' */ |
| /* RFC 3004 - The User Class Option for DHCP */ |
| { TAG_USER_CLASS, "$User-Class" }, |
| /* RFC 3011 */ |
| { TAG_IP4_SUBNET_SELECT, "iSUBNET" }, |
| /* RFC 3442 */ |
| { TAG_CLASSLESS_STATIC_RT, "$Classless-Static-Route" }, |
| { TAG_CLASSLESS_STA_RT_MS, "$Classless-Static-Route-Microsoft" }, |
| /* RFC 5859 - TFTP Server Address Option for DHCPv4 */ |
| { TAG_TFTP_SERVER_ADDRESS, "iTFTP-Server-Address" }, |
| /* http://www.iana.org/assignments/bootp-dhcp-extensions/index.htm */ |
| { TAG_SLP_NAMING_AUTH, "aSLP-NA" }, |
| { TAG_CLIENT_FQDN, "$FQDN" }, |
| { TAG_AGENT_CIRCUIT, "$Agent-Information" }, |
| { TAG_AGENT_REMOTE, "bARMT" }, |
| { TAG_AGENT_MASK, "bAMSK" }, |
| { TAG_TZ_STRING, "aTZSTR" }, |
| { TAG_FQDN_OPTION, "bFQDNS" }, /* XXX 'b' */ |
| { TAG_AUTH, "bAUTH" }, /* XXX 'b' */ |
| { TAG_VINES_SERVERS, "iVINES" }, |
| { TAG_SERVER_RANK, "sRANK" }, |
| { TAG_CLIENT_ARCH, "sARCH" }, |
| { TAG_CLIENT_NDI, "bNDI" }, /* XXX 'b' */ |
| { TAG_CLIENT_GUID, "bGUID" }, /* XXX 'b' */ |
| { TAG_LDAP_URL, "aLDAP" }, |
| { TAG_6OVER4, "i6o4" }, |
| { TAG_TZ_PCODE, "aPOSIX-TZ" }, |
| { TAG_TZ_TCODE, "aTZ-Name" }, |
| { TAG_IPX_COMPAT, "bIPX" }, /* XXX 'b' */ |
| { TAG_NETINFO_PARENT, "iNI" }, |
| { TAG_NETINFO_PARENT_TAG, "aNITAG" }, |
| { TAG_URL, "aURL" }, |
| { TAG_FAILOVER, "bFAIL" }, /* XXX 'b' */ |
| { TAG_MUDURL, "aMUD-URL" }, |
| { 0, NULL } |
| }; |
| /* 2-byte extended tags */ |
| static const struct tok xtag2str[] = { |
| { 0, NULL } |
| }; |
| |
| /* DHCP "options overload" types */ |
| static const struct tok oo2str[] = { |
| { 1, "file" }, |
| { 2, "sname" }, |
| { 3, "file+sname" }, |
| { 0, NULL } |
| }; |
| |
| /* NETBIOS over TCP/IP node type options */ |
| static const struct tok nbo2str[] = { |
| { 0x1, "b-node" }, |
| { 0x2, "p-node" }, |
| { 0x4, "m-node" }, |
| { 0x8, "h-node" }, |
| { 0, NULL } |
| }; |
| |
| /* ARP Hardware types, for Client-ID option */ |
| static const struct tok arp2str[] = { |
| { 0x1, "ether" }, |
| { 0x6, "ieee802" }, |
| { 0x7, "arcnet" }, |
| { 0xf, "frelay" }, |
| { 0x17, "strip" }, |
| { 0x18, "ieee1394" }, |
| { 0, NULL } |
| }; |
| |
| static const struct tok dhcp_msg_values[] = { |
| { DHCPDISCOVER, "Discover" }, |
| { DHCPOFFER, "Offer" }, |
| { DHCPREQUEST, "Request" }, |
| { DHCPDECLINE, "Decline" }, |
| { DHCPACK, "ACK" }, |
| { DHCPNAK, "NACK" }, |
| { DHCPRELEASE, "Release" }, |
| { DHCPINFORM, "Inform" }, |
| { 0, NULL } |
| }; |
| |
| #define AGENT_SUBOPTION_CIRCUIT_ID 1 /* RFC 3046 */ |
| #define AGENT_SUBOPTION_REMOTE_ID 2 /* RFC 3046 */ |
| #define AGENT_SUBOPTION_SUBSCRIBER_ID 6 /* RFC 3993 */ |
| static const struct tok agent_suboption_values[] = { |
| { AGENT_SUBOPTION_CIRCUIT_ID, "Circuit-ID" }, |
| { AGENT_SUBOPTION_REMOTE_ID, "Remote-ID" }, |
| { AGENT_SUBOPTION_SUBSCRIBER_ID, "Subscriber-ID" }, |
| { 0, NULL } |
| }; |
| |
| |
| static void |
| rfc1048_print(netdissect_options *ndo, |
| register const u_char *bp) |
| { |
| register uint16_t tag; |
| register u_int len; |
| register const char *cp; |
| register char c; |
| int first, idx; |
| uint32_t ul; |
| uint16_t us; |
| uint8_t uc, subopt, suboptlen; |
| |
| ND_PRINT((ndo, "\n\t Vendor-rfc1048 Extensions")); |
| |
| /* Step over magic cookie */ |
| ND_PRINT((ndo, "\n\t Magic Cookie 0x%08x", EXTRACT_32BITS(bp))); |
| bp += sizeof(int32_t); |
| |
| /* Loop while we there is a tag left in the buffer */ |
| while (ND_TTEST2(*bp, 1)) { |
| tag = *bp++; |
| if (tag == TAG_PAD && ndo->ndo_vflag < 3) |
| continue; |
| if (tag == TAG_END && ndo->ndo_vflag < 3) |
| return; |
| if (tag == TAG_EXTENDED_OPTION) { |
| ND_TCHECK2(*(bp + 1), 2); |
| tag = EXTRACT_16BITS(bp + 1); |
| /* XXX we don't know yet if the IANA will |
| * preclude overlap of 1-byte and 2-byte spaces. |
| * If not, we need to offset tag after this step. |
| */ |
| cp = tok2str(xtag2str, "?xT%u", tag); |
| } else |
| cp = tok2str(tag2str, "?T%u", tag); |
| c = *cp++; |
| |
| if (tag == TAG_PAD || tag == TAG_END) |
| len = 0; |
| else { |
| /* Get the length; check for truncation */ |
| ND_TCHECK2(*bp, 1); |
| len = *bp++; |
| } |
| |
| ND_PRINT((ndo, "\n\t %s Option %u, length %u%s", cp, tag, len, |
| len > 0 ? ": " : "")); |
| |
| if (tag == TAG_PAD && ndo->ndo_vflag > 2) { |
| u_int ntag = 1; |
| while (ND_TTEST2(*bp, 1) && *bp == TAG_PAD) { |
| bp++; |
| ntag++; |
| } |
| if (ntag > 1) |
| ND_PRINT((ndo, ", occurs %u", ntag)); |
| } |
| |
| if (!ND_TTEST2(*bp, len)) { |
| ND_PRINT((ndo, "[|rfc1048 %u]", len)); |
| return; |
| } |
| |
| if (tag == TAG_DHCP_MESSAGE && len == 1) { |
| uc = *bp++; |
| ND_PRINT((ndo, "%s", tok2str(dhcp_msg_values, "Unknown (%u)", uc))); |
| continue; |
| } |
| |
| if (tag == TAG_PARM_REQUEST) { |
| idx = 0; |
| while (len-- > 0) { |
| uc = *bp++; |
| cp = tok2str(tag2str, "?Option %u", uc); |
| if (idx % 4 == 0) |
| ND_PRINT((ndo, "\n\t ")); |
| else |
| ND_PRINT((ndo, ", ")); |
| ND_PRINT((ndo, "%s", cp + 1)); |
| idx++; |
| } |
| continue; |
| } |
| |
| if (tag == TAG_EXTENDED_REQUEST) { |
| first = 1; |
| while (len > 1) { |
| len -= 2; |
| us = EXTRACT_16BITS(bp); |
| bp += 2; |
| cp = tok2str(xtag2str, "?xT%u", us); |
| if (!first) |
| ND_PRINT((ndo, "+")); |
| ND_PRINT((ndo, "%s", cp + 1)); |
| first = 0; |
| } |
| continue; |
| } |
| |
| /* Print data */ |
| if (c == '?') { |
| /* Base default formats for unknown tags on data size */ |
| if (len & 1) |
| c = 'b'; |
| else if (len & 2) |
| c = 's'; |
| else |
| c = 'l'; |
| } |
| first = 1; |
| switch (c) { |
| |
| case 'a': |
| /* ascii strings */ |
| ND_PRINT((ndo, "\"")); |
| if (fn_printn(ndo, bp, len, ndo->ndo_snapend)) { |
| ND_PRINT((ndo, "\"")); |
| goto trunc; |
| } |
| ND_PRINT((ndo, "\"")); |
| bp += len; |
| len = 0; |
| break; |
| |
| case 'i': |
| case 'l': |
| case 'L': |
| /* ip addresses/32-bit words */ |
| while (len >= sizeof(ul)) { |
| if (!first) |
| ND_PRINT((ndo, ",")); |
| ul = EXTRACT_32BITS(bp); |
| if (c == 'i') { |
| ul = htonl(ul); |
| ND_PRINT((ndo, "%s", ipaddr_string(ndo, &ul))); |
| } else if (c == 'L') |
| ND_PRINT((ndo, "%d", ul)); |
| else |
| ND_PRINT((ndo, "%u", ul)); |
| bp += sizeof(ul); |
| len -= sizeof(ul); |
| first = 0; |
| } |
| break; |
| |
| case 'p': |
| /* IP address pairs */ |
| while (len >= 2*sizeof(ul)) { |
| if (!first) |
| ND_PRINT((ndo, ",")); |
| memcpy((char *)&ul, (const char *)bp, sizeof(ul)); |
| ND_PRINT((ndo, "(%s:", ipaddr_string(ndo, &ul))); |
| bp += sizeof(ul); |
| memcpy((char *)&ul, (const char *)bp, sizeof(ul)); |
| ND_PRINT((ndo, "%s)", ipaddr_string(ndo, &ul))); |
| bp += sizeof(ul); |
| len -= 2*sizeof(ul); |
| first = 0; |
| } |
| break; |
| |
| case 's': |
| /* shorts */ |
| while (len >= sizeof(us)) { |
| if (!first) |
| ND_PRINT((ndo, ",")); |
| us = EXTRACT_16BITS(bp); |
| ND_PRINT((ndo, "%u", us)); |
| bp += sizeof(us); |
| len -= sizeof(us); |
| first = 0; |
| } |
| break; |
| |
| case 'B': |
| /* boolean */ |
| while (len > 0) { |
| if (!first) |
| ND_PRINT((ndo, ",")); |
| switch (*bp) { |
| case 0: |
| ND_PRINT((ndo, "N")); |
| break; |
| case 1: |
| ND_PRINT((ndo, "Y")); |
| break; |
| default: |
| ND_PRINT((ndo, "%u?", *bp)); |
| break; |
| } |
| ++bp; |
| --len; |
| first = 0; |
| } |
| break; |
| |
| case 'b': |
| case 'x': |
| default: |
| /* Bytes */ |
| while (len > 0) { |
| if (!first) |
| ND_PRINT((ndo, c == 'x' ? ":" : ".")); |
| if (c == 'x') |
| ND_PRINT((ndo, "%02x", *bp)); |
| else |
| ND_PRINT((ndo, "%u", *bp)); |
| ++bp; |
| --len; |
| first = 0; |
| } |
| break; |
| |
| case '$': |
| /* Guys we can't handle with one of the usual cases */ |
| switch (tag) { |
| |
| case TAG_NETBIOS_NODE: |
| /* this option should be at least 1 byte long */ |
| if (len < 1) { |
| ND_PRINT((ndo, "ERROR: length < 1 bytes")); |
| break; |
| } |
| tag = *bp++; |
| --len; |
| ND_PRINT((ndo, "%s", tok2str(nbo2str, NULL, tag))); |
| break; |
| |
| case TAG_OPT_OVERLOAD: |
| /* this option should be at least 1 byte long */ |
| if (len < 1) { |
| ND_PRINT((ndo, "ERROR: length < 1 bytes")); |
| break; |
| } |
| tag = *bp++; |
| --len; |
| ND_PRINT((ndo, "%s", tok2str(oo2str, NULL, tag))); |
| break; |
| |
| case TAG_CLIENT_FQDN: |
| /* this option should be at least 3 bytes long */ |
| if (len < 3) { |
| ND_PRINT((ndo, "ERROR: length < 3 bytes")); |
| bp += len; |
| len = 0; |
| break; |
| } |
| if (*bp) |
| ND_PRINT((ndo, "[%s] ", client_fqdn_flags(*bp))); |
| bp++; |
| if (*bp || *(bp+1)) |
| ND_PRINT((ndo, "%u/%u ", *bp, *(bp+1))); |
| bp += 2; |
| ND_PRINT((ndo, "\"")); |
| if (fn_printn(ndo, bp, len - 3, ndo->ndo_snapend)) { |
| ND_PRINT((ndo, "\"")); |
| goto trunc; |
| } |
| ND_PRINT((ndo, "\"")); |
| bp += len - 3; |
| len = 0; |
| break; |
| |
| case TAG_CLIENT_ID: |
| { |
| int type; |
| |
| /* this option should be at least 1 byte long */ |
| if (len < 1) { |
| ND_PRINT((ndo, "ERROR: length < 1 bytes")); |
| break; |
| } |
| type = *bp++; |
| len--; |
| if (type == 0) { |
| ND_PRINT((ndo, "\"")); |
| if (fn_printn(ndo, bp, len, ndo->ndo_snapend)) { |
| ND_PRINT((ndo, "\"")); |
| goto trunc; |
| } |
| ND_PRINT((ndo, "\"")); |
| bp += len; |
| len = 0; |
| break; |
| } else { |
| ND_PRINT((ndo, "%s ", tok2str(arp2str, "hardware-type %u,", type))); |
| while (len > 0) { |
| if (!first) |
| ND_PRINT((ndo, ":")); |
| ND_PRINT((ndo, "%02x", *bp)); |
| ++bp; |
| --len; |
| first = 0; |
| } |
| } |
| break; |
| } |
| |
| case TAG_AGENT_CIRCUIT: |
| while (len >= 2) { |
| subopt = *bp++; |
| suboptlen = *bp++; |
| len -= 2; |
| if (suboptlen > len) { |
| ND_PRINT((ndo, "\n\t %s SubOption %u, length %u: length goes past end of option", |
| tok2str(agent_suboption_values, "Unknown", subopt), |
| subopt, |
| suboptlen)); |
| bp += len; |
| len = 0; |
| break; |
| } |
| ND_PRINT((ndo, "\n\t %s SubOption %u, length %u: ", |
| tok2str(agent_suboption_values, "Unknown", subopt), |
| subopt, |
| suboptlen)); |
| switch (subopt) { |
| |
| case AGENT_SUBOPTION_CIRCUIT_ID: /* fall through */ |
| case AGENT_SUBOPTION_REMOTE_ID: |
| case AGENT_SUBOPTION_SUBSCRIBER_ID: |
| if (fn_printn(ndo, bp, suboptlen, ndo->ndo_snapend)) |
| goto trunc; |
| break; |
| |
| default: |
| print_unknown_data(ndo, bp, "\n\t\t", suboptlen); |
| } |
| |
| len -= suboptlen; |
| bp += suboptlen; |
| } |
| break; |
| |
| case TAG_CLASSLESS_STATIC_RT: |
| case TAG_CLASSLESS_STA_RT_MS: |
| { |
| u_int mask_width, significant_octets, i; |
| |
| /* this option should be at least 5 bytes long */ |
| if (len < 5) { |
| ND_PRINT((ndo, "ERROR: length < 5 bytes")); |
| bp += len; |
| len = 0; |
| break; |
| } |
| while (len > 0) { |
| if (!first) |
| ND_PRINT((ndo, ",")); |
| mask_width = *bp++; |
| len--; |
| /* mask_width <= 32 */ |
| if (mask_width > 32) { |
| ND_PRINT((ndo, "[ERROR: Mask width (%d) > 32]", mask_width)); |
| bp += len; |
| len = 0; |
| break; |
| } |
| significant_octets = (mask_width + 7) / 8; |
| /* significant octets + router(4) */ |
| if (len < significant_octets + 4) { |
| ND_PRINT((ndo, "[ERROR: Remaining length (%u) < %u bytes]", len, significant_octets + 4)); |
| bp += len; |
| len = 0; |
| break; |
| } |
| ND_PRINT((ndo, "(")); |
| if (mask_width == 0) |
| ND_PRINT((ndo, "default")); |
| else { |
| for (i = 0; i < significant_octets ; i++) { |
| if (i > 0) |
| ND_PRINT((ndo, ".")); |
| ND_PRINT((ndo, "%d", *bp++)); |
| } |
| for (i = significant_octets ; i < 4 ; i++) |
| ND_PRINT((ndo, ".0")); |
| ND_PRINT((ndo, "/%d", mask_width)); |
| } |
| memcpy((char *)&ul, (const char *)bp, sizeof(ul)); |
| ND_PRINT((ndo, ":%s)", ipaddr_string(ndo, &ul))); |
| bp += sizeof(ul); |
| len -= (significant_octets + 4); |
| first = 0; |
| } |
| break; |
| } |
| |
| case TAG_USER_CLASS: |
| { |
| u_int suboptnumber = 1; |
| |
| first = 1; |
| if (len < 2) { |
| ND_PRINT((ndo, "ERROR: length < 2 bytes")); |
| bp += len; |
| len = 0; |
| break; |
| } |
| while (len > 0) { |
| suboptlen = *bp++; |
| len--; |
| ND_PRINT((ndo, "\n\t ")); |
| ND_PRINT((ndo, "instance#%u: ", suboptnumber)); |
| if (suboptlen == 0) { |
| ND_PRINT((ndo, "ERROR: suboption length must be non-zero")); |
| bp += len; |
| len = 0; |
| break; |
| } |
| if (len < suboptlen) { |
| ND_PRINT((ndo, "ERROR: invalid option")); |
| bp += len; |
| len = 0; |
| break; |
| } |
| ND_PRINT((ndo, "\"")); |
| if (fn_printn(ndo, bp, suboptlen, ndo->ndo_snapend)) { |
| ND_PRINT((ndo, "\"")); |
| goto trunc; |
| } |
| ND_PRINT((ndo, "\"")); |
| ND_PRINT((ndo, ", length %d", suboptlen)); |
| suboptnumber++; |
| len -= suboptlen; |
| bp += suboptlen; |
| } |
| break; |
| } |
| |
| default: |
| ND_PRINT((ndo, "[unknown special tag %u, size %u]", |
| tag, len)); |
| bp += len; |
| len = 0; |
| break; |
| } |
| break; |
| } |
| /* Data left over? */ |
| if (len) { |
| ND_PRINT((ndo, "\n\t trailing data length %u", len)); |
| bp += len; |
| } |
| } |
| return; |
| trunc: |
| ND_PRINT((ndo, "|[rfc1048]")); |
| } |
| |
| static void |
| cmu_print(netdissect_options *ndo, |
| register const u_char *bp) |
| { |
| register const struct cmu_vend *cmu; |
| |
| #define PRINTCMUADDR(m, s) { ND_TCHECK(cmu->m); \ |
| if (cmu->m.s_addr != 0) \ |
| ND_PRINT((ndo, " %s:%s", s, ipaddr_string(ndo, &cmu->m.s_addr))); } |
| |
| ND_PRINT((ndo, " vend-cmu")); |
| cmu = (const struct cmu_vend *)bp; |
| |
| /* Only print if there are unknown bits */ |
| ND_TCHECK(cmu->v_flags); |
| if ((cmu->v_flags & ~(VF_SMASK)) != 0) |
| ND_PRINT((ndo, " 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: |
| ND_PRINT((ndo, "%s", tstr)); |
| #undef PRINTCMUADDR |
| } |
| |
| static char * |
| client_fqdn_flags(u_int flags) |
| { |
| static char buf[8+1]; |
| int i = 0; |
| |
| if (flags & CLIENT_FQDN_FLAGS_S) |
| buf[i++] = 'S'; |
| if (flags & CLIENT_FQDN_FLAGS_O) |
| buf[i++] = 'O'; |
| if (flags & CLIENT_FQDN_FLAGS_E) |
| buf[i++] = 'E'; |
| if (flags & CLIENT_FQDN_FLAGS_N) |
| buf[i++] = 'N'; |
| buf[i] = '\0'; |
| |
| return buf; |
| } |