* 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.
*/
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
+/* \summary: BOOTP and IPv4 DHCP printer */
+
+#include <config.h>
-#include <tcpdump-stdinc.h>
+#include "netdissect-stdinc.h"
-#include <stdio.h>
#include <string.h>
-#include "interface.h"
+#define ND_LONGJMP_FROM_TCHECK
+#include "netdissect.h"
#include "addrtoname.h"
#include "extract.h"
-#include "ether.h"
-#include "bootp.h"
-static const char tstr[] = " [|bootp]";
-static void rfc1048_print(const u_char *);
-static void cmu_print(const u_char *);
-static char *client_fqdn_flags(u_int flags);
+/*
+ * 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 {
+ nd_uint8_t bp_op; /* packet opcode type */
+ nd_uint8_t bp_htype; /* hardware addr type */
+ nd_uint8_t bp_hlen; /* hardware addr length */
+ nd_uint8_t bp_hops; /* gateway hops */
+ nd_uint32_t bp_xid; /* transaction ID */
+ nd_uint16_t bp_secs; /* seconds since boot began */
+ nd_uint16_t bp_flags; /* flags - see bootp_flag_values[]
+ in print-bootp.c */
+ nd_ipv4 bp_ciaddr; /* client IP address */
+ nd_ipv4 bp_yiaddr; /* 'your' IP address */
+ nd_ipv4 bp_siaddr; /* server IP address */
+ nd_ipv4 bp_giaddr; /* gateway IP address */
+ nd_byte bp_chaddr[16]; /* client hardware address */
+ nd_byte bp_sname[64]; /* server host name */
+ nd_byte bp_file[128]; /* boot file name */
+ nd_byte bp_vend[64]; /* vendor-specific area */
+};
+
+#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_SMTP_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_AUTO_CONFIGURE ((uint8_t) 116)
+/* RFC 2610 */
+#define TAG_SLP_DA ((uint8_t) 78)
+#define TAG_SLP_SCOPE ((uint8_t) 79)
+/* RFC 8925 */
+#define TAG_IPV6_ONLY_PREFERRED ((uint8_t) 108)
+/* 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)
+/* RFC8572 */
+#define TAG_SZTP_REDIRECT ((uint8_t) 143)
+/* RFC 5859 - TFTP Server Address Option for DHCPv4 */
+#define TAG_TFTP_SERVER_ADDRESS ((uint8_t) 150)
+/* https://www.iana.org/assignments/bootp-dhcp-parameters/bootp-dhcp-parameters.xhtml */
+#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_TZ_STRING ((uint8_t) 88)
+#define TAG_FQDN_OPTION ((uint8_t) 89)
+#define TAG_AUTH ((uint8_t) 90)
+#define TAG_CLIENT_LAST_TRANSACTION_TIME ((uint8_t) 91)
+#define TAG_ASSOCIATED_IP ((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)
+/* RFC 4833, TZ codes */
+#define TAG_TZ_PCODE ((uint8_t) 100)
+#define TAG_TZ_TCODE ((uint8_t) 101)
+#define TAG_NETINFO_PARENT ((uint8_t) 112)
+#define TAG_NETINFO_PARENT_TAG ((uint8_t) 113)
+#define TAG_URL ((uint8_t) 114)
+#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
+/* Defined in RFC4388 */
+#define DHCPLEASEQUERY 10
+#define DHCPLEASEUNASSIGNED 11
+#define DHCPLEASEUNKNOWN 12
+#define DHCPLEASEACTIVE 13
+
+
+/*
+ * "vendor" data permitted for CMU bootp clients.
+ */
+
+struct cmu_vend {
+ nd_byte v_magic[4]; /* magic number */
+ nd_uint32_t v_flags; /* flags/opcodes, etc. */
+ nd_ipv4 v_smask; /* Subnet mask */
+ nd_ipv4 v_dgate; /* Default gateway */
+ nd_ipv4 v_dns1, v_dns2; /* Domain name servers */
+ nd_ipv4 v_ins1, v_ins2; /* IEN-116 name servers */
+ nd_ipv4 v_ts1, v_ts2; /* Time servers */
+ nd_byte v_unused[24]; /* currently unused */
+};
+
+
+/* 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 const struct tok fqdn_flags_bm[] = {
+ { CLIENT_FQDN_FLAGS_S, "S" },
+ { CLIENT_FQDN_FLAGS_O, "O" },
+ { CLIENT_FQDN_FLAGS_E, "E" },
+ { CLIENT_FQDN_FLAGS_N, "N" },
+ { 0, NULL }
+};
+
+static void rfc1048_print(netdissect_options *, const u_char *);
+static void cmu_print(netdissect_options *, const u_char *);
static const struct tok bootp_flag_values[] = {
- { 0x8000, "Broadcast" },
- { 0, NULL}
+ { 0x8000, "Broadcast" },
+ { 0, NULL}
};
static const struct tok bootp_op_values[] = {
- { BOOTPREQUEST, "Request" },
- { BOOTPREPLY, "Reply" },
- { 0, NULL}
+ { BOOTPREQUEST, "Request" },
+ { BOOTPREPLY, "Reply" },
+ { 0, NULL}
};
/*
* Print bootp requests
*/
void
-bootp_print(register const u_char *cp, u_int length)
+bootp_print(netdissect_options *ndo,
+ const u_char *cp, u_int length)
{
- register const struct bootp *bp;
+ const struct bootp *bp;
static const u_char vm_cmu[4] = VM_CMU;
static const u_char vm_rfc1048[4] = VM_RFC1048;
+ uint8_t bp_op, bp_htype, bp_hlen;
+ ndo->ndo_protocol = "bootp";
bp = (const struct bootp *)cp;
- TCHECK(bp->bp_op);
-
- printf("BOOTP/DHCP, %s",
- tok2str(bootp_op_values, "unknown (0x%02x)", bp->bp_op));
-
- if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) {
- TCHECK2(bp->bp_chaddr[0], 6);
- printf(" from %s", etheraddr_string(bp->bp_chaddr));
+ bp_op = GET_U_1(bp->bp_op);
+ ND_PRINT("BOOTP/DHCP, %s",
+ tok2str(bootp_op_values, "unknown (0x%02x)", bp_op));
+
+ bp_htype = GET_U_1(bp->bp_htype);
+ bp_hlen = GET_U_1(bp->bp_hlen);
+ if (bp_htype == 1 && bp_hlen == MAC48_LEN && bp_op == BOOTPREQUEST) {
+ ND_PRINT(" from %s", GET_MAC48_STRING(bp->bp_chaddr));
}
- printf(", length %u", length);
+ ND_PRINT(", length %u", length);
- if (!vflag)
- return;
+ if (!ndo->ndo_vflag)
+ return;
- TCHECK(bp->bp_secs);
+ ND_TCHECK_2(bp->bp_secs);
/* The usual hardware address type is 1 (10Mb Ethernet) */
- if (bp->bp_htype != 1)
- printf(", htype %d", bp->bp_htype);
+ if (bp_htype != 1)
+ ND_PRINT(", htype %u", 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);
+ if (bp_htype != 1 || bp_hlen != MAC48_LEN)
+ ND_PRINT(", hlen %u", bp_hlen);
/* Only print interesting fields */
- if (bp->bp_hops)
- printf(", hops %d", bp->bp_hops);
- if (bp->bp_xid)
- printf(", xid 0x%x", EXTRACT_32BITS(&bp->bp_xid));
- if (bp->bp_secs)
- printf(", secs %d", EXTRACT_16BITS(&bp->bp_secs));
-
- printf(", Flags [%s]",
- bittok2str(bootp_flag_values, "none", EXTRACT_16BITS(&bp->bp_flags)));
- if (vflag > 1)
- printf(" (0x%04x)", EXTRACT_16BITS(&bp->bp_flags));
+ if (GET_U_1(bp->bp_hops))
+ ND_PRINT(", hops %u", GET_U_1(bp->bp_hops));
+ if (GET_BE_U_4(bp->bp_xid))
+ ND_PRINT(", xid 0x%x", GET_BE_U_4(bp->bp_xid));
+ if (GET_BE_U_2(bp->bp_secs))
+ ND_PRINT(", secs %u", GET_BE_U_2(bp->bp_secs));
+
+ ND_PRINT(", Flags [%s]",
+ bittok2str(bootp_flag_values, "none", GET_BE_U_2(bp->bp_flags)));
+ if (ndo->ndo_vflag > 1)
+ ND_PRINT(" (0x%04x)", GET_BE_U_2(bp->bp_flags));
/* Client's ip address */
- TCHECK(bp->bp_ciaddr);
- if (bp->bp_ciaddr.s_addr)
- printf("\n\t Client-IP %s", ipaddr_string(&bp->bp_ciaddr));
+ if (GET_IPV4_TO_NETWORK_ORDER(bp->bp_ciaddr))
+ ND_PRINT("\n\t Client-IP %s", GET_IPADDR_STRING(bp->bp_ciaddr));
/* 'your' ip address (bootp client) */
- TCHECK(bp->bp_yiaddr);
- if (bp->bp_yiaddr.s_addr)
- printf("\n\t Your-IP %s", ipaddr_string(&bp->bp_yiaddr));
+ if (GET_IPV4_TO_NETWORK_ORDER(bp->bp_yiaddr))
+ ND_PRINT("\n\t Your-IP %s", GET_IPADDR_STRING(bp->bp_yiaddr));
/* Server's ip address */
- TCHECK(bp->bp_siaddr);
- if (bp->bp_siaddr.s_addr)
- printf("\n\t Server-IP %s", ipaddr_string(&bp->bp_siaddr));
+ if (GET_IPV4_TO_NETWORK_ORDER(bp->bp_siaddr))
+ ND_PRINT("\n\t Server-IP %s", GET_IPADDR_STRING(bp->bp_siaddr));
/* Gateway's ip address */
- TCHECK(bp->bp_giaddr);
- if (bp->bp_giaddr.s_addr)
- printf("\n\t Gateway-IP %s", ipaddr_string(&bp->bp_giaddr));
+ if (GET_IPV4_TO_NETWORK_ORDER(bp->bp_giaddr))
+ ND_PRINT("\n\t Gateway-IP %s", GET_IPADDR_STRING(bp->bp_giaddr));
/* Client's Ethernet address */
- if (bp->bp_htype == 1 && bp->bp_hlen == 6) {
- TCHECK2(bp->bp_chaddr[0], 6);
- printf("\n\t Client-Ethernet-Address %s", etheraddr_string(bp->bp_chaddr));
+ if (bp_htype == 1 && bp_hlen == MAC48_LEN) {
+ ND_PRINT("\n\t Client-Ethernet-Address %s", GET_MAC48_STRING(bp->bp_chaddr));
}
- TCHECK2(bp->bp_sname[0], 1); /* check first char only */
- if (*bp->bp_sname) {
- printf("\n\t sname \"");
- if (fn_print(bp->bp_sname, snapend)) {
- putchar('"');
- fputs(tstr + 1, stdout);
- return;
+ if (GET_U_1(bp->bp_sname)) { /* get first char only */
+ ND_PRINT("\n\t sname \"");
+ if (nd_printztn(ndo, bp->bp_sname, (u_int)sizeof(bp->bp_sname),
+ NULL) == 0) {
+ /* Within the buffer, but not NUL-terminated. */
+ ND_PRINT("\"");
+ goto invalid;
}
- putchar('"');
+ ND_PRINT("\"");
}
- TCHECK2(bp->bp_file[0], 1); /* check first char only */
- if (*bp->bp_file) {
- printf("\n\t file \"");
- if (fn_print(bp->bp_file, snapend)) {
- putchar('"');
- fputs(tstr + 1, stdout);
- return;
+ if (GET_U_1(bp->bp_file)) { /* get first char only */
+ ND_PRINT("\n\t file \"");
+ if (nd_printztn(ndo, bp->bp_file, (u_int)sizeof(bp->bp_file),
+ NULL) == 0) {
+ /* Ditto. */
+ ND_PRINT("\"");
+ goto invalid;
}
- putchar('"');
+ ND_PRINT("\"");
}
/* Decode the vendor buffer */
- TCHECK(bp->bp_vend[0]);
+ ND_TCHECK_4(bp->bp_vend);
if (memcmp((const char *)bp->bp_vend, vm_rfc1048,
- sizeof(u_int32_t)) == 0)
- rfc1048_print(bp->bp_vend);
+ sizeof(uint32_t)) == 0)
+ rfc1048_print(ndo, bp->bp_vend);
else if (memcmp((const char *)bp->bp_vend, vm_cmu,
- sizeof(u_int32_t)) == 0)
- cmu_print(bp->bp_vend);
+ sizeof(uint32_t)) == 0)
+ cmu_print(ndo, bp->bp_vend);
else {
- u_int32_t ul;
+ uint32_t ul;
- ul = EXTRACT_32BITS(&bp->bp_vend);
+ ul = GET_BE_U_4(bp->bp_vend);
if (ul != 0)
- printf("\n\t Vendor-#0x%x", ul);
+ ND_PRINT("\n\t Vendor-#0x%x", ul);
}
-
return;
-trunc:
- fputs(tstr, stdout);
+invalid:
+ nd_print_invalid(ndo);
}
/*
* 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)
+ * l - unsigned longs (32 bits)
+ * L - longs (32 bits)
+ * s - unsigned shorts (16 bits)
+ * b - period-separated decimal bytes (variable length)
+ * x - colon-separated hex bytes (variable length)
+ * a - ASCII string (variable length)
* B - on/off (8 bits)
* $ - special (explicit code to handle)
*/
{ 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_HOSTNAME, "aHostname" }, /* ASCII hostname */
{ TAG_BOOTSIZE, "sBS" }, /* 512 byte blocks */
{ TAG_END, " END" },
/* RFC1497 tags */
{ TAG_NIS_P_DOMAIN, "sN+D" },
{ TAG_NIS_P_SERVERS, "iN+S" },
{ TAG_MOBILE_HOME, "iMH" },
- { TAG_SMPT_SERVER, "iSMTP" },
+ { TAG_SMTP_SERVER, "iSMTP" },
{ TAG_POP3_SERVER, "iPOP3" },
{ TAG_NNTP_SERVER, "iNNTP" },
{ TAG_WWW_SERVER, "iWWW" },
/* RFC 2485 */
{ TAG_OPEN_GROUP_UAP, "aUAP" },
/* RFC 2563 */
- { TAG_DISABLE_AUTOCONF, "BNOAUTO" },
+ { TAG_AUTO_CONFIGURE, "BAuto-Configure" },
/* 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, "$Classless-Static-Route-Microsoft" },
-/* http://www.iana.org/assignments/bootp-dhcp-extensions/index.htm */
- { TAG_USER_CLASS, "aCLASS" },
+/* RFC 8572 */
+ { TAG_SZTP_REDIRECT, "$SZTP-Redirect" },
+/* RFC 5859 - TFTP Server Address Option for DHCPv4 */
+ { TAG_TFTP_SERVER_ADDRESS, "iTFTP-Server-Address" },
+/* https://www.iana.org/assignments/bootp-dhcp-parameters/bootp-dhcp-parameters.xhtml#options */
{ 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_LAST_TRANSACTION_TIME, "lLast-Transaction-Time" },
+ { TAG_ASSOCIATED_IP, "iAssociated-IP" },
{ TAG_CLIENT_ARCH, "sARCH" },
{ TAG_CLIENT_NDI, "bNDI" }, /* XXX 'b' */
{ TAG_CLIENT_GUID, "bGUID" }, /* XXX 'b' */
{ TAG_LDAP_URL, "aLDAP" },
- { TAG_6OVER4, "i6o4" },
- { TAG_PRINTER_NAME, "aPRTR" },
- { TAG_MDHCP_SERVER, "bMDHCP" }, /* XXX 'b' */
- { TAG_IPX_COMPAT, "bIPX" }, /* XXX 'b' */
+ { TAG_TZ_PCODE, "aPOSIX-TZ" },
+ { TAG_TZ_TCODE, "aTZ-Name" },
{ TAG_NETINFO_PARENT, "iNI" },
{ TAG_NETINFO_PARENT_TAG, "aNITAG" },
{ TAG_URL, "aURL" },
- { TAG_FAILOVER, "bFAIL" }, /* XXX 'b' */
- { 0, NULL }
-};
-/* 2-byte extended tags */
-static const struct tok xtag2str[] = {
- { 0, NULL }
+ { TAG_MUDURL, "aMUD-URL" },
+ { TAG_IPV6_ONLY_PREFERRED, "$IPv6-Only-Preferred" },
+ { 0, NULL }
};
/* DHCP "options overload" types */
static const struct tok oo2str[] = {
- { 1, "file" },
- { 2, "sname" },
- { 3, "file+sname" },
- { 0, NULL }
+ { 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 }
+ { 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 }
+ { 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 }
+ { DHCPDISCOVER, "Discover" },
+ { DHCPOFFER, "Offer" },
+ { DHCPREQUEST, "Request" },
+ { DHCPDECLINE, "Decline" },
+ { DHCPACK, "ACK" },
+ { DHCPNAK, "NACK" },
+ { DHCPRELEASE, "Release" },
+ { DHCPINFORM, "Inform" },
+ { DHCPLEASEQUERY, "LeaseQuery" },
+ { DHCPLEASEUNASSIGNED, "LeaseUnassigned" },
+ { DHCPLEASEUNKNOWN, "LeaseUnknown" },
+ { DHCPLEASEACTIVE, "LeaseActive" },
+ { 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 */
+#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 }
+ { AGENT_SUBOPTION_CIRCUIT_ID, "Circuit-ID" },
+ { AGENT_SUBOPTION_REMOTE_ID, "Remote-ID" },
+ { AGENT_SUBOPTION_SUBSCRIBER_ID, "Subscriber-ID" },
+ { 0, NULL }
};
static void
-rfc1048_print(register const u_char *bp)
+rfc1048_print(netdissect_options *ndo,
+ const u_char *bp)
{
- register u_int16_t tag;
- register u_int len;
- register const char *cp;
- register char c;
+ uint16_t tag;
+ u_int len;
+ const char *cp;
+ char c;
int first, idx;
- u_int32_t ul;
- u_int16_t us;
- u_int8_t uc, subopt, suboptlen;
+ uint8_t subopt, suboptlen;
- printf("\n\t Vendor-rfc1048 Extensions");
+ ND_PRINT("\n\t Vendor-rfc1048 Extensions");
/* Step over magic cookie */
- printf("\n\t Magic Cookie 0x%08x", EXTRACT_32BITS(bp));
+ ND_PRINT("\n\t Magic Cookie 0x%08x", GET_BE_U_4(bp));
bp += sizeof(int32_t);
/* Loop while we there is a tag left in the buffer */
- while (TTEST2(*bp, 1)) {
- tag = *bp++;
- if (tag == TAG_PAD && vflag < 3)
+ while (ND_TTEST_1(bp)) {
+ tag = GET_U_1(bp);
+ bp++;
+ if (tag == TAG_PAD && ndo->ndo_vflag < 3)
continue;
- if (tag == TAG_END && vflag < 3)
+ if (tag == TAG_END && ndo->ndo_vflag < 3)
return;
- if (tag == TAG_EXTENDED_OPTION) {
- 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);
+ cp = tok2str(tag2str, "?Unknown", tag);
c = *cp++;
if (tag == TAG_PAD || tag == TAG_END)
len = 0;
else {
/* Get the length; check for truncation */
- TCHECK2(*bp, 1);
- len = *bp++;
+ len = GET_U_1(bp);
+ bp++;
}
- printf("\n\t %s Option %u, length %u%s", cp, tag, len,
- len > 0 ? ": " : "");
+ ND_PRINT("\n\t %s (%u), length %u%s", cp, tag, len,
+ len > 0 ? ": " : "");
- if (tag == TAG_PAD && vflag > 2) {
+ if (tag == TAG_PAD && ndo->ndo_vflag > 2) {
u_int ntag = 1;
- while (TTEST2(*bp, 1) && *bp == TAG_PAD) {
+ while (ND_TTEST_1(bp) &&
+ GET_U_1(bp) == TAG_PAD) {
bp++;
ntag++;
}
if (ntag > 1)
- printf(", occurs %u", ntag);
+ ND_PRINT(", occurs %u", ntag);
}
- if (!TTEST2(*bp, len)) {
- printf("[|rfc1048 %u]", len);
- return;
- }
+ ND_TCHECK_LEN(bp, len);
if (tag == TAG_DHCP_MESSAGE && len == 1) {
- uc = *bp++;
- printf("%s", tok2str(dhcp_msg_values, "Unknown (%u)", uc));
- continue;
+ ND_PRINT("%s",
+ tok2str(dhcp_msg_values, "Unknown (%u)", GET_U_1(bp)));
+ bp++;
+ continue;
}
if (tag == TAG_PARM_REQUEST) {
idx = 0;
- while (len-- > 0) {
- uc = *bp++;
- cp = tok2str(tag2str, "?Option %u", uc);
+ while (len != 0) {
+ uint8_t innertag = GET_U_1(bp);
+ bp++;
+ len--;
+ cp = tok2str(tag2str, "?Unknown", innertag);
if (idx % 4 == 0)
- printf("\n\t ");
+ ND_PRINT("\n\t ");
else
- printf(", ");
- printf("%s", cp + 1);
+ ND_PRINT(", ");
+ ND_PRINT("%s (%u)", cp + 1, innertag);
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)
- putchar('+');
- printf("%s", cp + 1);
- first = 0;
- }
- continue;
- }
-
/* Print data */
if (c == '?') {
/* Base default formats for unknown tags on data size */
switch (c) {
case 'a':
- /* ascii strings */
- putchar('"');
- if (fn_printn(bp, len, snapend)) {
- putchar('"');
- goto trunc;
- }
- putchar('"');
+ /* ASCII strings */
+ ND_PRINT("\"");
+ nd_printjn(ndo, bp, len);
+ ND_PRINT("\"");
bp += len;
len = 0;
break;
case 'l':
case 'L':
/* ip addresses/32-bit words */
- while (len >= sizeof(ul)) {
+ while (len >= 4) {
if (!first)
- putchar(',');
- ul = EXTRACT_32BITS(bp);
- if (c == 'i') {
- ul = htonl(ul);
- printf("%s", ipaddr_string(&ul));
- } else if (c == 'L')
- printf("%d", ul);
+ ND_PRINT(",");
+ if (c == 'i')
+ ND_PRINT("%s", GET_IPADDR_STRING(bp));
+ else if (c == 'L')
+ ND_PRINT("%d", GET_BE_S_4(bp));
else
- printf("%u", ul);
- bp += sizeof(ul);
- len -= sizeof(ul);
+ ND_PRINT("%u", GET_BE_U_4(bp));
+ bp += 4;
+ len -= 4;
first = 0;
}
break;
case 'p':
/* IP address pairs */
- while (len >= 2*sizeof(ul)) {
+ /* this option should be N x 8 bytes long */
+ if (len < 8 || len % 8 != 0) {
+ ND_PRINT("%s[length != N x 8 bytes]",
+ len == 0 ? " " : "");
+ bp += len;
+ len = 0;
+ break;
+ }
+ while (len >= 2*4) {
if (!first)
- putchar(',');
- memcpy((char *)&ul, (const char *)bp, sizeof(ul));
- printf("(%s:", ipaddr_string(&ul));
- bp += sizeof(ul);
- memcpy((char *)&ul, (const char *)bp, sizeof(ul));
- printf("%s)", ipaddr_string(&ul));
- bp += sizeof(ul);
- len -= 2*sizeof(ul);
+ ND_PRINT(",");
+ ND_PRINT("(%s:", GET_IPADDR_STRING(bp));
+ bp += 4;
+ len -= 4;
+ ND_PRINT("%s)", GET_IPADDR_STRING(bp));
+ bp += 4;
+ len -= 4;
first = 0;
}
break;
case 's':
- /* shorts */
- while (len >= sizeof(us)) {
+ /* unsigned shorts */
+ while (len >= 2) {
if (!first)
- putchar(',');
- us = EXTRACT_16BITS(bp);
- printf("%u", us);
- bp += sizeof(us);
- len -= sizeof(us);
+ ND_PRINT(",");
+ ND_PRINT("%u", GET_BE_U_2(bp));
+ bp += 2;
+ len -= 2;
first = 0;
}
break;
case 'B':
/* boolean */
- while (len > 0) {
- if (!first)
- putchar(',');
- switch (*bp) {
- case 0:
- putchar('N');
- break;
- case 1:
- putchar('Y');
- break;
- default:
- printf("%u?", *bp);
- break;
- }
- ++bp;
- --len;
- first = 0;
+ {
+ /* this option should be 1 byte long */
+ if (len != 1) {
+ ND_PRINT("[length != 1 byte]");
+ nd_print_invalid(ndo);
+ bp += len;
+ len = 0;
+ break;
+ }
+
+ uint8_t bool_value;
+ bool_value = GET_U_1(bp);
+ switch (bool_value) {
+ case 0:
+ ND_PRINT("N");
+ break;
+ case 1:
+ ND_PRINT("Y");
+ break;
+ default:
+ ND_PRINT("%u?", bool_value);
+ break;
}
+ ++bp;
+ --len;
break;
+ }
case 'b':
case 'x':
default:
/* Bytes */
- while (len > 0) {
+ while (len != 0) {
+ uint8_t byte_value;
if (!first)
- putchar(c == 'x' ? ':' : '.');
+ ND_PRINT(c == 'x' ? ":" : ".");
+ byte_value = GET_U_1(bp);
if (c == 'x')
- printf("%02x", *bp);
+ ND_PRINT("%02x", byte_value);
else
- printf("%u", *bp);
+ ND_PRINT("%u", byte_value);
++bp;
--len;
first = 0;
case TAG_NETBIOS_NODE:
/* this option should be at least 1 byte long */
- if (len < 1) {
- printf("ERROR: option %u len %u < 1 bytes",
- TAG_NETBIOS_NODE, len);
+ if (len < 1) {
+ ND_PRINT("[length < 1 byte]");
+ nd_print_invalid(ndo);
break;
}
- tag = *bp++;
+ tag = GET_U_1(bp);
+ ++bp;
--len;
- fputs(tok2str(nbo2str, NULL, tag), stdout);
+ ND_PRINT("%s", tok2str(nbo2str, NULL, tag));
break;
case TAG_OPT_OVERLOAD:
/* this option should be at least 1 byte long */
- if (len < 1) {
- printf("ERROR: option %u len %u < 1 bytes",
- TAG_OPT_OVERLOAD, len);
+ if (len < 1) {
+ ND_PRINT("[length < 1 byte]");
+ nd_print_invalid(ndo);
break;
}
- tag = *bp++;
+ tag = GET_U_1(bp);
+ ++bp;
--len;
- fputs(tok2str(oo2str, NULL, tag), stdout);
+ ND_PRINT("%s", tok2str(oo2str, NULL, tag));
break;
case TAG_CLIENT_FQDN:
/* this option should be at least 3 bytes long */
- if (len < 3) {
- printf("ERROR: option %u len %u < 3 bytes",
- TAG_CLIENT_FQDN, len);
+ if (len < 3) {
+ ND_PRINT("[length < 3 bytes]");
+ nd_print_invalid(ndo);
bp += len;
len = 0;
break;
}
- if (*bp)
- printf("[%s] ", client_fqdn_flags(*bp));
+ if (GET_U_1(bp) & 0xf0) {
+ ND_PRINT("[MBZ nibble 0x%x != 0] ",
+ (GET_U_1(bp) & 0xf0) >> 4);
+ nd_print_invalid(ndo);
+ }
+ if (GET_U_1(bp) & 0x0f)
+ ND_PRINT("[%s] ",
+ bittok2str_nosep(fqdn_flags_bm, "", (GET_U_1(bp))));
bp++;
- if (*bp || *(bp+1))
- printf("%u/%u ", *bp, *(bp+1));
+ if (GET_U_1(bp) || GET_U_1(bp + 1))
+ ND_PRINT("%u/%u ", GET_U_1(bp),
+ GET_U_1(bp + 1));
bp += 2;
- putchar('"');
- if (fn_printn(bp, len - 3, snapend)) {
- putchar('"');
- goto trunc;
- }
- putchar('"');
+ ND_PRINT("\"");
+ nd_printjn(ndo, bp, len - 3);
+ ND_PRINT("\"");
bp += len - 3;
len = 0;
break;
case TAG_CLIENT_ID:
- { int type;
+ {
+ int type;
/* this option should be at least 1 byte long */
- if (len < 1) {
- printf("ERROR: option %u len %u < 1 bytes",
- TAG_CLIENT_ID, len);
+ if (len < 1) {
+ ND_PRINT("[length < 1 byte]");
+ nd_print_invalid(ndo);
break;
}
- type = *bp++;
+ type = GET_U_1(bp);
+ bp++;
len--;
if (type == 0) {
- putchar('"');
- if (fn_printn(bp, len, snapend)) {
- putchar('"');
- goto trunc;
- }
- putchar('"');
+ ND_PRINT("\"");
+ nd_printjn(ndo, bp, len);
+ ND_PRINT("\"");
bp += len;
len = 0;
break;
} else {
- printf("%s ", tok2str(arp2str, "hardware-type %u,", type));
- while (len > 0) {
+ ND_PRINT("%s ", tok2str(arp2str, "hardware-type %u,", type));
+ while (len != 0) {
if (!first)
- putchar(':');
- printf("%02x", *bp);
+ ND_PRINT(":");
+ ND_PRINT("%02x", GET_U_1(bp));
++bp;
--len;
first = 0;
case TAG_AGENT_CIRCUIT:
while (len >= 2) {
- subopt = *bp++;
- suboptlen = *bp++;
+ subopt = GET_U_1(bp);
+ suboptlen = GET_U_1(bp + 1);
+ bp += 2;
len -= 2;
if (suboptlen > len) {
- printf("\n\t %s SubOption %u, length %u: length goes past end of option",
- tok2str(agent_suboption_values, "Unknown", subopt),
- subopt,
- suboptlen);
+ ND_PRINT("\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;
}
- printf("\n\t %s SubOption %u, length %u: ",
- tok2str(agent_suboption_values, "Unknown", subopt),
- subopt,
- suboptlen);
+ ND_PRINT("\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:
- fn_printn(bp, suboptlen, NULL);
- break;
+ case AGENT_SUBOPTION_CIRCUIT_ID: /* fall through */
+ case AGENT_SUBOPTION_REMOTE_ID:
+ case AGENT_SUBOPTION_SUBSCRIBER_ID:
+ nd_printjn(ndo, bp, suboptlen);
+ break;
default:
- print_unknown_data(gndo,bp, "\n\t\t", suboptlen);
+ print_unknown_data(ndo, bp, "\n\t\t", suboptlen);
}
len -= suboptlen;
bp += suboptlen;
- }
- break;
+ }
+ 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) {
- printf("ERROR: option %u len %u < 5 bytes",
- TAG_CLASSLESS_STATIC_RT, len);
+ if (len < 5) {
+ ND_PRINT("[length < 5 bytes]");
+ nd_print_invalid(ndo);
bp += len;
len = 0;
break;
}
- while (len > 0) {
+ while (len != 0) {
if (!first)
- putchar(',');
- mask_width = *bp++;
+ ND_PRINT(",");
+ mask_width = GET_U_1(bp);
+ bp++;
len--;
/* mask_width <= 32 */
if (mask_width > 32) {
- printf("[ERROR: Mask width (%d) > 32]", mask_width);
+ ND_PRINT("[Mask width (%u) > 32]", mask_width);
+ nd_print_invalid(ndo);
bp += len;
len = 0;
break;
significant_octets = (mask_width + 7) / 8;
/* significant octets + router(4) */
if (len < significant_octets + 4) {
- printf("[ERROR: Remaining length (%u) < %u bytes]", len, significant_octets + 4);
+ ND_PRINT("[Remaining length (%u) < %u bytes]", len, significant_octets + 4);
+ nd_print_invalid(ndo);
bp += len;
len = 0;
break;
}
- putchar('(');
+ ND_PRINT("(");
if (mask_width == 0)
- printf("default");
+ ND_PRINT("default");
else {
for (i = 0; i < significant_octets ; i++) {
if (i > 0)
- putchar('.');
- printf("%d", *bp++);
+ ND_PRINT(".");
+ ND_PRINT("%u",
+ GET_U_1(bp));
+ bp++;
}
for (i = significant_octets ; i < 4 ; i++)
- printf(".0");
- printf("/%d", mask_width);
+ ND_PRINT(".0");
+ ND_PRINT("/%u", mask_width);
}
- memcpy((char *)&ul, (const char *)bp, sizeof(ul));
- printf(":%s)", ipaddr_string(&ul));
- bp += sizeof(ul);
+ ND_PRINT(":%s)", GET_IPADDR_STRING(bp));
+ bp += 4;
len -= (significant_octets + 4);
first = 0;
}
- }
- break;
+ break;
+ }
+
+ case TAG_USER_CLASS:
+ {
+ u_int suboptnumber = 1;
+
+ first = 1;
+ if (len < 2) {
+ ND_PRINT("[length < 2 bytes]");
+ nd_print_invalid(ndo);
+ bp += len;
+ len = 0;
+ break;
+ }
+ while (len != 0) {
+ suboptlen = GET_U_1(bp);
+ bp++;
+ len--;
+ ND_PRINT("\n\t ");
+ ND_PRINT("instance#%u: ", suboptnumber);
+ if (suboptlen == 0) {
+ ND_PRINT("[suboption length == 0]");
+ nd_print_invalid(ndo);
+ bp += len;
+ len = 0;
+ break;
+ }
+ if (len < suboptlen) {
+ ND_PRINT("[length %u < suboption length %u",
+ len, suboptlen);
+ nd_print_invalid(ndo);
+ bp += len;
+ len = 0;
+ break;
+ }
+ ND_PRINT("\"");
+ nd_printjn(ndo, bp, suboptlen);
+ ND_PRINT("\"");
+ ND_PRINT(", length %u", suboptlen);
+ suboptnumber++;
+ len -= suboptlen;
+ bp += suboptlen;
+ }
+ break;
+ }
+
+
+ case TAG_SZTP_REDIRECT:
+ /* as per https://datatracker.ietf.org/doc/html/rfc8572#section-8.3
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+-+-+-+-+-+-+
+ | uri-length | URI |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+-+-+-+-+-+-+
+
+ * uri-length: 2 octets long; specifies the length of the URI data.
+ * URI: URI of the SZTP bootstrap server.
+ */
+ while (len >= 2) {
+ uint16_t suboptlen2;
+
+ suboptlen2 = GET_BE_U_2(bp);
+ bp += 2;
+ len -= 2;
+ ND_PRINT("\n\t ");
+ ND_PRINT("length %u: ", suboptlen2);
+ if (len < suboptlen2) {
+ ND_PRINT("length goes past end of option");
+ bp += len;
+ len = 0;
+ break;
+ }
+ ND_PRINT("\"");
+ nd_printjn(ndo, bp, suboptlen2);
+ ND_PRINT("\"");
+ len -= suboptlen2;
+ bp += suboptlen2;
+ }
+ if (len != 0) {
+ ND_PRINT("[length < 2 bytes]");
+ nd_print_invalid(ndo);
+ }
+ break;
+
+ case TAG_IPV6_ONLY_PREFERRED:
+ /* this option should be 4 bytes long */
+ if (len != 4) {
+ ND_PRINT("[length != 4 bytes]");
+ nd_print_invalid(ndo);
+ bp += len;
+ len = 0;
+ }
+ ND_PRINT("%u", GET_BE_U_4(bp));
+ bp += 4;
+ len -= 4;
+ break;
default:
- printf("[unknown special tag %u, size %u]",
- tag, len);
+ ND_PRINT("[unknown special tag %u, size %u]",
+ tag, len);
bp += len;
len = 0;
break;
}
/* Data left over? */
if (len) {
- printf("\n\t trailing data length %u", len);
+ ND_PRINT("\n\t trailing data length %u", len);
bp += len;
}
}
- return;
-trunc:
- printf("|[rfc1048]");
}
+#define PRINTCMUADDR(m, s) { ND_TCHECK_4(cmu->m); \
+ if (GET_IPV4_TO_NETWORK_ORDER(cmu->m) != 0) \
+ ND_PRINT(" %s:%s", s, GET_IPADDR_STRING(cmu->m)); }
+
static void
-cmu_print(register const u_char *bp)
+cmu_print(netdissect_options *ndo,
+ const u_char *bp)
{
- register const struct cmu_vend *cmu;
-
-#define PRINTCMUADDR(m, s) { TCHECK(cmu->m); \
- if (cmu->m.s_addr != 0) \
- printf(" %s:%s", s, ipaddr_string(&cmu->m.s_addr)); }
+ const struct cmu_vend *cmu;
+ uint8_t v_flags;
- printf(" vend-cmu");
+ ND_PRINT(" vend-cmu");
cmu = (const 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);
+ ND_TCHECK_4(cmu->v_flags);
+ v_flags = GET_U_1(cmu->v_flags);
+ if ((v_flags & ~(VF_SMASK)) != 0)
+ ND_PRINT(" F:0x%x", v_flags);
PRINTCMUADDR(v_dgate, "DG");
- PRINTCMUADDR(v_smask, cmu->v_flags & VF_SMASK ? "SM" : "SM*");
+ PRINTCMUADDR(v_smask, 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
}
-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;
-}
+#undef PRINTCMUADDR
projects / tcpdump / blobdiff