]> The Tcpdump Group git mirrors - tcpdump/blobdiff - print-bootp.c
Makefile.in: don't remove configure and config.h.in in make distclean.
[tcpdump] / print-bootp.c
index aef7063cf568fbd7776d88ff0541bfa7dfe0c765..8449f0ff9ade8f7857bd311eb94fc0186a0ac296 100644 (file)
 
 #include <string.h>
 
+#define ND_LONGJMP_FROM_TCHECK
 #include "netdissect.h"
 #include "addrtoname.h"
 #include "extract.h"
 
-static const char tstr[] = " [|bootp]";
 
 /*
  * Bootstrap Protocol (BOOTP).  RFC951 and RFC1048.
@@ -196,32 +196,26 @@ struct bootp {
 #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 */
+/* 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_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_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)
-#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) */
@@ -233,6 +227,12 @@ struct bootp {
 #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.
@@ -261,9 +261,16 @@ struct cmu_vend {
 #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 char *client_fqdn_flags(u_int flags);
 
 static const struct tok bootp_flag_values[] = {
        { 0x8000,       "Broadcast" },
@@ -290,17 +297,14 @@ bootp_print(netdissect_options *ndo,
 
        ndo->ndo_protocol = "bootp";
        bp = (const struct bootp *)cp;
-       ND_TCHECK_1(bp->bp_op);
-       bp_op = EXTRACT_U_1(bp->bp_op);
+       bp_op = GET_U_1(bp->bp_op);
        ND_PRINT("BOOTP/DHCP, %s",
                  tok2str(bootp_op_values, "unknown (0x%02x)", bp_op));
 
-       ND_TCHECK_1(bp->bp_hlen);
-       bp_htype = EXTRACT_U_1(bp->bp_htype);
-       bp_hlen = EXTRACT_U_1(bp->bp_hlen);
-       if (bp_htype == 1 && bp_hlen == 6 && bp_op == BOOTPREQUEST) {
-               ND_TCHECK_6(bp->bp_chaddr);
-               ND_PRINT(" from %s", etheraddr_string(ndo, bp->bp_chaddr));
+       bp_htype = GET_U_1(bp->bp_htype);
+       bp_hlen = GET_U_1(bp->bp_hlen);
+       if (bp_htype == 1 && bp_hlen == MAC_ADDR_LEN && bp_op == BOOTPREQUEST) {
+               ND_PRINT(" from %s", GET_ETHERADDR_STRING(bp->bp_chaddr));
        }
 
        ND_PRINT(", length %u", length);
@@ -315,68 +319,60 @@ bootp_print(netdissect_options *ndo,
                ND_PRINT(", htype %u", bp_htype);
 
        /* The usual length for 10Mb Ethernet address is 6 bytes */
-       if (bp_htype != 1 || bp_hlen != 6)
+       if (bp_htype != 1 || bp_hlen != MAC_ADDR_LEN)
                ND_PRINT(", hlen %u", bp_hlen);
 
        /* Only print interesting fields */
-       if (EXTRACT_U_1(bp->bp_hops))
-               ND_PRINT(", hops %u", EXTRACT_U_1(bp->bp_hops));
-       if (EXTRACT_BE_U_4(bp->bp_xid))
-               ND_PRINT(", xid 0x%x", EXTRACT_BE_U_4(bp->bp_xid));
-       if (EXTRACT_BE_U_2(bp->bp_secs))
-               ND_PRINT(", secs %u", EXTRACT_BE_U_2(bp->bp_secs));
-
-       ND_TCHECK_2(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", EXTRACT_BE_U_2(bp->bp_flags)));
+                 bittok2str(bootp_flag_values, "none", GET_BE_U_2(bp->bp_flags)));
        if (ndo->ndo_vflag > 1)
-               ND_PRINT(" (0x%04x)", EXTRACT_BE_U_2(bp->bp_flags));
+               ND_PRINT(" (0x%04x)", GET_BE_U_2(bp->bp_flags));
 
        /* Client's ip address */
-       ND_TCHECK_4(bp->bp_ciaddr);
-       if (EXTRACT_IPV4_TO_NETWORK_ORDER(bp->bp_ciaddr))
-               ND_PRINT("\n\t  Client-IP %s", ipaddr_string(ndo, 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) */
-       ND_TCHECK_4(bp->bp_yiaddr);
-       if (EXTRACT_IPV4_TO_NETWORK_ORDER(bp->bp_yiaddr))
-               ND_PRINT("\n\t  Your-IP %s", ipaddr_string(ndo, 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 */
-       ND_TCHECK_4(bp->bp_siaddr);
-       if (EXTRACT_IPV4_TO_NETWORK_ORDER(bp->bp_siaddr))
-               ND_PRINT("\n\t  Server-IP %s", ipaddr_string(ndo, 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 */
-       ND_TCHECK_4(bp->bp_giaddr);
-       if (EXTRACT_IPV4_TO_NETWORK_ORDER(bp->bp_giaddr))
-               ND_PRINT("\n\t  Gateway-IP %s", ipaddr_string(ndo, 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_htype == 1 && bp_hlen == 6) {
-               ND_TCHECK_6(bp->bp_chaddr);
-               ND_PRINT("\n\t  Client-Ethernet-Address %s", etheraddr_string(ndo, bp->bp_chaddr));
+       if (bp_htype == 1 && bp_hlen == MAC_ADDR_LEN) {
+               ND_PRINT("\n\t  Client-Ethernet-Address %s", GET_ETHERADDR_STRING(bp->bp_chaddr));
        }
 
-       ND_TCHECK_1(bp->bp_sname);              /* check first char only */
-       if (EXTRACT_U_1(bp->bp_sname)) {
+       if (GET_U_1(bp->bp_sname)) {    /* get first char only */
                ND_PRINT("\n\t  sname \"");
-               if (fn_printztn(ndo, bp->bp_sname, (u_int)sizeof(bp->bp_sname),
-                   ndo->ndo_snapend)) {
+               if (nd_printztn(ndo, bp->bp_sname, (u_int)sizeof(bp->bp_sname),
+                               NULL) == 0) {
+                       /* Within the buffer, but not NUL-terminated. */
                        ND_PRINT("\"");
-                       ND_PRINT("%s", tstr + 1);
-                       return;
+                       goto invalid;
                }
                ND_PRINT("\"");
        }
-       ND_TCHECK_1(bp->bp_file);               /* check first char only */
-       if (EXTRACT_U_1(bp->bp_file)) {
+       if (GET_U_1(bp->bp_file)) {     /* get first char only */
                ND_PRINT("\n\t  file \"");
-               if (fn_printztn(ndo, bp->bp_file, (u_int)sizeof(bp->bp_file),
-                   ndo->ndo_snapend)) {
+               if (nd_printztn(ndo, bp->bp_file, (u_int)sizeof(bp->bp_file),
+                               NULL) == 0) {
+                       /* Ditto. */
                        ND_PRINT("\"");
-                       ND_PRINT("%s", tstr + 1);
-                       return;
+                       goto invalid;
                }
                ND_PRINT("\"");
        }
@@ -392,14 +388,13 @@ bootp_print(netdissect_options *ndo,
        else {
                uint32_t ul;
 
-               ul = EXTRACT_BE_U_4(bp->bp_vend);
+               ul = GET_BE_U_4(bp->bp_vend);
                if (ul != 0)
                        ND_PRINT("\n\t  Vendor-#0x%x", ul);
        }
-
        return;
-trunc:
-       ND_PRINT("%s", tstr);
+invalid:
+       nd_print_invalid(ndo);
 }
 
 /*
@@ -409,8 +404,8 @@ trunc:
  *     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)
+ *     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)
@@ -513,36 +508,28 @@ static const struct tok tag2str[] = {
        { TAG_CLASSLESS_STA_RT_MS, "$Classless-Static-Route-Microsoft" },
 /* RFC 5859 - TFTP Server Address Option for DHCPv4 */
        { TAG_TFTP_SERVER_ADDRESS, "iTFTP-Server-Address" },
-/* http://www.iana.org/assignments/bootp-dhcp-extensions/index.htm */
+/* https://www.iana.org/assignments/bootp-dhcp-parameters/bootp-dhcp-parameters.xhtml#options */
        { TAG_SLP_NAMING_AUTH,  "aSLP-NA" },
        { TAG_CLIENT_FQDN,      "$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_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[] = {
@@ -573,14 +560,18 @@ static const struct tok arp2str[] = {
 };
 
 static const struct tok dhcp_msg_values[] = {
-       { DHCPDISCOVER, "Discover" },
-       { DHCPOFFER,    "Offer" },
-       { DHCPREQUEST,  "Request" },
-       { DHCPDECLINE,  "Decline" },
-       { DHCPACK,      "ACK" },
-       { DHCPNAK,      "NACK" },
-       { DHCPRELEASE,  "Release" },
-       { DHCPINFORM,   "Inform" },
+       { 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 }
 };
 
@@ -609,45 +600,35 @@ rfc1048_print(netdissect_options *ndo,
        ND_PRINT("\n\t  Vendor-rfc1048 Extensions");
 
        /* Step over magic cookie */
-       ND_PRINT("\n\t    Magic Cookie 0x%08x", EXTRACT_BE_U_4(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 (ND_TTEST_1(bp)) {
-               tag = EXTRACT_U_1(bp);
+               tag = GET_U_1(bp);
                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_TCHECK_2(bp + 1);
-                       tag = EXTRACT_BE_U_2(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 */
-                       ND_TCHECK_1(bp);
-                       len = EXTRACT_U_1(bp);
+                       len = GET_U_1(bp);
                        bp++;
                }
 
-               ND_PRINT("\n\t    %s Option %u, length %u%s", cp, tag, len,
+               ND_PRINT("\n\t    %s (%u), length %u%s", cp, tag, len,
                          len > 0 ? ": " : "");
 
                if (tag == TAG_PAD && ndo->ndo_vflag > 2) {
                        u_int ntag = 1;
                        while (ND_TTEST_1(bp) &&
-                              EXTRACT_U_1(bp) == TAG_PAD) {
+                              GET_U_1(bp) == TAG_PAD) {
                                bp++;
                                ntag++;
                        }
@@ -655,13 +636,11 @@ rfc1048_print(netdissect_options *ndo,
                                ND_PRINT(", occurs %u", ntag);
                }
 
-               if (!ND_TTEST_LEN(bp, len)) {
-                       ND_PRINT("[|rfc1048 %u]", len);
-                       return;
-               }
+               ND_TCHECK_LEN(bp, len);
 
                if (tag == TAG_DHCP_MESSAGE && len == 1) {
-                       ND_PRINT("%s", tok2str(dhcp_msg_values, "Unknown (%u)", EXTRACT_U_1(bp)));
+                       ND_PRINT("%s",
+                                tok2str(dhcp_msg_values, "Unknown (%u)", GET_U_1(bp)));
                        bp++;
                        continue;
                }
@@ -669,33 +648,20 @@ rfc1048_print(netdissect_options *ndo,
                if (tag == TAG_PARM_REQUEST) {
                        idx = 0;
                        while (len > 0) {
-                               cp = tok2str(tag2str, "?Option %u", EXTRACT_U_1(bp));
+                               uint8_t innertag = GET_U_1(bp);
                                bp++;
                                len--;
+                               cp = tok2str(tag2str, "?Unknown", innertag);
                                if (idx % 4 == 0)
                                        ND_PRINT("\n\t      ");
                                else
                                        ND_PRINT(", ");
-                               ND_PRINT("%s", cp + 1);
+                               ND_PRINT("%s (%u)", cp + 1, innertag);
                                idx++;
                        }
                        continue;
                }
 
-               if (tag == TAG_EXTENDED_REQUEST) {
-                       first = 1;
-                       while (len > 1) {
-                               cp = tok2str(xtag2str, "?xT%u", EXTRACT_BE_U_2(bp));
-                               bp += 2;
-                               len -= 2;
-                               if (!first)
-                                       ND_PRINT("+");
-                               ND_PRINT("%s", cp + 1);
-                               first = 0;
-                       }
-                       continue;
-               }
-
                /* Print data */
                if (c == '?') {
                        /* Base default formats for unknown tags on data size */
@@ -712,10 +678,7 @@ rfc1048_print(netdissect_options *ndo,
                case 'a':
                        /* ASCII strings */
                        ND_PRINT("\"");
-                       if (fn_printn(ndo, bp, len, ndo->ndo_snapend)) {
-                               ND_PRINT("\"");
-                               goto trunc;
-                       }
+                       nd_printjn(ndo, bp, len);
                        ND_PRINT("\"");
                        bp += len;
                        len = 0;
@@ -729,11 +692,11 @@ rfc1048_print(netdissect_options *ndo,
                                if (!first)
                                        ND_PRINT(",");
                                if (c == 'i')
-                                       ND_PRINT("%s", ipaddr_string(ndo, bp));
+                                       ND_PRINT("%s", GET_IPADDR_STRING(bp));
                                else if (c == 'L')
-                                       ND_PRINT("%d", EXTRACT_BE_S_4(bp));
+                                       ND_PRINT("%d", GET_BE_S_4(bp));
                                else
-                                       ND_PRINT("%u", EXTRACT_BE_U_4(bp));
+                                       ND_PRINT("%u", GET_BE_U_4(bp));
                                bp += 4;
                                len -= 4;
                                first = 0;
@@ -745,10 +708,10 @@ rfc1048_print(netdissect_options *ndo,
                        while (len >= 2*4) {
                                if (!first)
                                        ND_PRINT(",");
-                               ND_PRINT("(%s:", ipaddr_string(ndo, bp));
+                               ND_PRINT("(%s:", GET_IPADDR_STRING(bp));
                                bp += 4;
                                len -= 4;
-                               ND_PRINT("%s)", ipaddr_string(ndo, bp));
+                               ND_PRINT("%s)", GET_IPADDR_STRING(bp));
                                bp += 4;
                                len -= 4;
                                first = 0;
@@ -760,7 +723,7 @@ rfc1048_print(netdissect_options *ndo,
                        while (len >= 2) {
                                if (!first)
                                        ND_PRINT(",");
-                               ND_PRINT("%u", EXTRACT_BE_U_2(bp));
+                               ND_PRINT("%u", GET_BE_U_2(bp));
                                bp += 2;
                                len -= 2;
                                first = 0;
@@ -773,7 +736,7 @@ rfc1048_print(netdissect_options *ndo,
                                uint8_t bool_value;
                                if (!first)
                                        ND_PRINT(",");
-                               bool_value = EXTRACT_U_1(bp);
+                               bool_value = GET_U_1(bp);
                                switch (bool_value) {
                                case 0:
                                        ND_PRINT("N");
@@ -799,7 +762,7 @@ rfc1048_print(netdissect_options *ndo,
                                uint8_t byte_value;
                                if (!first)
                                        ND_PRINT(c == 'x' ? ":" : ".");
-                               byte_value = EXTRACT_U_1(bp);
+                               byte_value = GET_U_1(bp);
                                if (c == 'x')
                                        ND_PRINT("%02x", byte_value);
                                else
@@ -817,10 +780,10 @@ rfc1048_print(netdissect_options *ndo,
                        case TAG_NETBIOS_NODE:
                                /* this option should be at least 1 byte long */
                                if (len < 1) {
-                                       ND_PRINT("ERROR: length < 1 bytes");
+                                       ND_PRINT("[ERROR: length < 1 bytes]");
                                        break;
                                }
-                               tag = EXTRACT_U_1(bp);
+                               tag = GET_U_1(bp);
                                ++bp;
                                --len;
                                ND_PRINT("%s", tok2str(nbo2str, NULL, tag));
@@ -829,10 +792,10 @@ rfc1048_print(netdissect_options *ndo,
                        case TAG_OPT_OVERLOAD:
                                /* this option should be at least 1 byte long */
                                if (len < 1) {
-                                       ND_PRINT("ERROR: length < 1 bytes");
+                                       ND_PRINT("[ERROR: length < 1 bytes]");
                                        break;
                                }
-                               tag = EXTRACT_U_1(bp);
+                               tag = GET_U_1(bp);
                                ++bp;
                                --len;
                                ND_PRINT("%s", tok2str(oo2str, NULL, tag));
@@ -841,22 +804,25 @@ rfc1048_print(netdissect_options *ndo,
                        case TAG_CLIENT_FQDN:
                                /* this option should be at least 3 bytes long */
                                if (len < 3) {
-                                       ND_PRINT("ERROR: length < 3 bytes");
+                                       ND_PRINT("[ERROR: length < 3 bytes]");
                                        bp += len;
                                        len = 0;
                                        break;
                                }
-                               if (EXTRACT_U_1(bp))
-                                       ND_PRINT("[%s] ", client_fqdn_flags(EXTRACT_U_1(bp)));
+                               if (GET_U_1(bp) & 0xf0) {
+                                       ND_PRINT("[ERROR: MBZ nibble 0x%x != 0] ",
+                                                (GET_U_1(bp) & 0xf0) >> 4);
+                               }
+                               if (GET_U_1(bp) & 0x0f)
+                                       ND_PRINT("[%s] ",
+                                                bittok2str_nosep(fqdn_flags_bm, "", (GET_U_1(bp))));
                                bp++;
-                               if (EXTRACT_U_1(bp) || EXTRACT_U_1(bp + 1))
-                                       ND_PRINT("%u/%u ", EXTRACT_U_1(bp), EXTRACT_U_1(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;
                                ND_PRINT("\"");
-                               if (fn_printn(ndo, bp, len - 3, ndo->ndo_snapend)) {
-                                       ND_PRINT("\"");
-                                       goto trunc;
-                               }
+                               nd_printjn(ndo, bp, len - 3);
                                ND_PRINT("\"");
                                bp += len - 3;
                                len = 0;
@@ -868,18 +834,15 @@ rfc1048_print(netdissect_options *ndo,
 
                                /* this option should be at least 1 byte long */
                                if (len < 1) {
-                                       ND_PRINT("ERROR: length < 1 bytes");
+                                       ND_PRINT("[ERROR: length < 1 bytes]");
                                        break;
                                }
-                               type = EXTRACT_U_1(bp);
+                               type = GET_U_1(bp);
                                bp++;
                                len--;
                                if (type == 0) {
                                        ND_PRINT("\"");
-                                       if (fn_printn(ndo, bp, len, ndo->ndo_snapend)) {
-                                               ND_PRINT("\"");
-                                               goto trunc;
-                                       }
+                                       nd_printjn(ndo, bp, len);
                                        ND_PRINT("\"");
                                        bp += len;
                                        len = 0;
@@ -889,7 +852,7 @@ rfc1048_print(netdissect_options *ndo,
                                        while (len > 0) {
                                                if (!first)
                                                        ND_PRINT(":");
-                                               ND_PRINT("%02x", EXTRACT_U_1(bp));
+                                               ND_PRINT("%02x", GET_U_1(bp));
                                                ++bp;
                                                --len;
                                                first = 0;
@@ -900,8 +863,8 @@ rfc1048_print(netdissect_options *ndo,
 
                        case TAG_AGENT_CIRCUIT:
                                while (len >= 2) {
-                                       subopt = EXTRACT_U_1(bp);
-                                       suboptlen = EXTRACT_U_1(bp + 1);
+                                       subopt = GET_U_1(bp);
+                                       suboptlen = GET_U_1(bp + 1);
                                        bp += 2;
                                        len -= 2;
                                        if (suboptlen > len) {
@@ -922,8 +885,7 @@ rfc1048_print(netdissect_options *ndo,
                                        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;
+                                               nd_printjn(ndo, bp, suboptlen);
                                                break;
 
                                        default:
@@ -942,7 +904,7 @@ rfc1048_print(netdissect_options *ndo,
 
                                /* this option should be at least 5 bytes long */
                                if (len < 5) {
-                                       ND_PRINT("ERROR: length < 5 bytes");
+                                       ND_PRINT("[ERROR: length < 5 bytes]");
                                        bp += len;
                                        len = 0;
                                        break;
@@ -950,7 +912,7 @@ rfc1048_print(netdissect_options *ndo,
                                while (len > 0) {
                                        if (!first)
                                                ND_PRINT(",");
-                                       mask_width = EXTRACT_U_1(bp);
+                                       mask_width = GET_U_1(bp);
                                        bp++;
                                        len--;
                                        /* mask_width <= 32 */
@@ -975,14 +937,15 @@ rfc1048_print(netdissect_options *ndo,
                                                for (i = 0; i < significant_octets ; i++) {
                                                        if (i > 0)
                                                                ND_PRINT(".");
-                                                       ND_PRINT("%u", EXTRACT_U_1(bp));
+                                                       ND_PRINT("%u",
+                                                                GET_U_1(bp));
                                                        bp++;
                                                }
                                                for (i = significant_octets ; i < 4 ; i++)
                                                        ND_PRINT(".0");
                                                ND_PRINT("/%u", mask_width);
                                        }
-                                       ND_PRINT(":%s)", ipaddr_string(ndo, bp));
+                                       ND_PRINT(":%s)", GET_IPADDR_STRING(bp));
                                        bp += 4;
                                        len -= (significant_octets + 4);
                                        first = 0;
@@ -996,34 +959,31 @@ rfc1048_print(netdissect_options *ndo,
 
                                first = 1;
                                if (len < 2) {
-                                       ND_PRINT("ERROR: length < 2 bytes");
+                                       ND_PRINT("[ERROR: length < 2 bytes]");
                                        bp += len;
                                        len = 0;
                                        break;
                                }
                                while (len > 0) {
-                                       suboptlen = EXTRACT_U_1(bp);
+                                       suboptlen = GET_U_1(bp);
                                        bp++;
                                        len--;
                                        ND_PRINT("\n\t      ");
                                        ND_PRINT("instance#%u: ", suboptnumber);
                                        if (suboptlen == 0) {
-                                               ND_PRINT("ERROR: suboption length must be non-zero");
+                                               ND_PRINT("[ERROR: suboption length must be non-zero]");
                                                bp += len;
                                                len = 0;
                                                break;
                                        }
                                        if (len < suboptlen) {
-                                               ND_PRINT("ERROR: invalid option");
+                                               ND_PRINT("[ERROR: invalid option]");
                                                bp += len;
                                                len = 0;
                                                break;
                                        }
                                        ND_PRINT("\"");
-                                       if (fn_printn(ndo, bp, suboptlen, ndo->ndo_snapend)) {
-                                               ND_PRINT("\"");
-                                               goto trunc;
-                                       }
+                                       nd_printjn(ndo, bp, suboptlen);
                                        ND_PRINT("\"");
                                        ND_PRINT(", length %u", suboptlen);
                                        suboptnumber++;
@@ -1048,14 +1008,11 @@ rfc1048_print(netdissect_options *ndo,
                        bp += len;
                }
        }
-       return;
-trunc:
-       ND_PRINT("|[rfc1048]");
 }
 
-#define PRINTCMUADDR(m, s) { ND_TCHECK_4(&cmu->m); \
-    if (EXTRACT_IPV4_TO_NETWORK_ORDER(cmu->m) != 0) \
-       ND_PRINT(" %s:%s", s, ipaddr_string(ndo, cmu->m)); }
+#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(netdissect_options *ndo,
@@ -1069,7 +1026,7 @@ cmu_print(netdissect_options *ndo,
 
        /* Only print if there are unknown bits */
        ND_TCHECK_4(cmu->v_flags);
-       v_flags = EXTRACT_U_1(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");
@@ -1080,29 +1037,6 @@ cmu_print(netdissect_options *ndo,
        PRINTCMUADDR(v_ins2, "IEN2");
        PRINTCMUADDR(v_ts1, "TS1");
        PRINTCMUADDR(v_ts2, "TS2");
-       return;
-
-trunc:
-       ND_PRINT("%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;
-}