Address Michael's comments.

[tcpdump] / print-bootp.c

diff --git a/print-bootp.c b/print-bootp.c
index 04f767ee1994703d0a601b2e93380ded9f69b509..c7538ff8714029e19d4365f02a5f42ee30edc87a 100644 (file)
--- a/print-bootp.c
+++ b/print-bootp.c
@@ -21,24 +21,16 @@
  * Format and print bootp packets.
  */
 #ifndef lint
  * Format and print bootp packets.
  */
 #ifndef lint

-static const char rcsid[] =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-bootp.c,v 1.59 2001-07-04 21:18:12 fenner Exp $ (LBL)";
+static const char rcsid[] _U_ =
+    "@(#) $Header: /tcpdump/master/tcpdump/print-bootp.c,v 1.89 2008-04-22 09:45:08 hannes Exp $ (LBL)";

 #endif
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
 #endif
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 

-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/socket.h>
+#include <tcpdump-stdinc.h>

 
 

-struct mbuf;
-struct rtentry;
-
-#include <netinet/in.h>
-
-#include <ctype.h>

 #include <stdio.h>
 #include <string.h>
 
 #include <stdio.h>
 #include <string.h>
 


@@ -48,102 +40,101 @@ struct rtentry;
 #include "ether.h"
 #include "bootp.h"
 
 #include "ether.h"
 #include "bootp.h"
 

-static void rfc1048_print(const u_char *, u_int);
-static void cmu_print(const u_char *, u_int);
+static void rfc1048_print(const u_char *);
+static void cmu_print(const u_char *);
+static char *client_fqdn_flags(u_int flags);

 
 static char tstr[] = " [|bootp]";
 
 
 static char tstr[] = " [|bootp]";
 

+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
 /*
  * Print bootp requests
  */
 void

-bootp_print(register const u_char *cp, u_int length,
-           u_short sport, u_short dport)
+bootp_print(register const u_char *cp, u_int length)

 {
        register const struct bootp *bp;
 {
        register const struct bootp *bp;

-       static u_char vm_cmu[4] = VM_CMU;
-       static u_char vm_rfc1048[4] = VM_RFC1048;
+       static const u_char vm_cmu[4] = VM_CMU;
+       static const u_char vm_rfc1048[4] = VM_RFC1048;

 
 

-       bp = (struct bootp *)cp;
+       bp = (const struct bootp *)cp;

        TCHECK(bp->bp_op);
        TCHECK(bp->bp_op);

-       switch (bp->bp_op) {
-
-       case BOOTREQUEST:
-               /* Usually, a request goes from a client to a server */
-               if (sport != IPPORT_BOOTPC || dport != IPPORT_BOOTPS)
-                       printf(" (request)");
-               break;
-
-       case BOOTREPLY:
-               /* Usually, a reply goes from a server to a client */
-               if (sport != IPPORT_BOOTPS || dport != IPPORT_BOOTPC)
-                       printf(" (reply)");
-               break;
-
-       default:
-               printf(" bootp-#%d", bp->bp_op);
+
+        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));

        }
 
        }
 

+        printf(", length %u", length);
+
+        if (!vflag)
+            return;
+

        TCHECK(bp->bp_secs);
 
        /* The usual hardware address type is 1 (10Mb Ethernet) */
        if (bp->bp_htype != 1)
        TCHECK(bp->bp_secs);
 
        /* The usual hardware address type is 1 (10Mb Ethernet) */
        if (bp->bp_htype != 1)

-               printf(" htype-#%d", bp->bp_htype);
+               printf(", htype %d", bp->bp_htype);

 
        /* The usual length for 10Mb Ethernet address is 6 bytes */
        if (bp->bp_htype != 1 || bp->bp_hlen != 6)
 
        /* 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);
+               printf(", hlen %d", bp->bp_hlen);

 
        /* Only print interesting fields */
        if (bp->bp_hops)
 
        /* Only print interesting fields */
        if (bp->bp_hops)

-               printf(" hops:%d", bp->bp_hops);
+               printf(", hops %d", bp->bp_hops);

        if (bp->bp_xid)
        if (bp->bp_xid)

-               printf(" xid:0x%x", (u_int32_t)ntohl(bp->bp_xid));
+               printf(", xid 0x%x", EXTRACT_32BITS(&bp->bp_xid));

        if (bp->bp_secs)
        if (bp->bp_secs)

-               printf(" secs:%d", ntohs(bp->bp_secs));
-       if (bp->bp_flags)
-               printf(" flags:0x%x", ntohs(bp->bp_flags));
+               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));

 
        /* Client's ip address */
        TCHECK(bp->bp_ciaddr);
        if (bp->bp_ciaddr.s_addr)
 
        /* Client's ip address */
        TCHECK(bp->bp_ciaddr);
        if (bp->bp_ciaddr.s_addr)

-               printf(" C:%s", ipaddr_string(&bp->bp_ciaddr));
+               printf("\n\t  Client-IP %s", ipaddr_string(&bp->bp_ciaddr));

 
        /* 'your' ip address (bootp client) */
        TCHECK(bp->bp_yiaddr);
        if (bp->bp_yiaddr.s_addr)
 
        /* 'your' ip address (bootp client) */
        TCHECK(bp->bp_yiaddr);
        if (bp->bp_yiaddr.s_addr)

-               printf(" Y:%s", ipaddr_string(&bp->bp_yiaddr));
+               printf("\n\t  Your-IP %s", ipaddr_string(&bp->bp_yiaddr));

 
        /* Server's ip address */
        TCHECK(bp->bp_siaddr);
        if (bp->bp_siaddr.s_addr)
 
        /* Server's ip address */
        TCHECK(bp->bp_siaddr);
        if (bp->bp_siaddr.s_addr)

-               printf(" S:%s", ipaddr_string(&bp->bp_siaddr));
+               printf("\n\t  Server-IP %s", ipaddr_string(&bp->bp_siaddr));

 
        /* Gateway's ip address */
        TCHECK(bp->bp_giaddr);
        if (bp->bp_giaddr.s_addr)
 
        /* Gateway's ip address */
        TCHECK(bp->bp_giaddr);
        if (bp->bp_giaddr.s_addr)

-               printf(" G:%s", ipaddr_string(&bp->bp_giaddr));
+               printf("\n\t  Gateway-IP %s", ipaddr_string(&bp->bp_giaddr));

 
        /* Client's Ethernet address */
        if (bp->bp_htype == 1 && bp->bp_hlen == 6) {
 
        /* Client's Ethernet address */
        if (bp->bp_htype == 1 && bp->bp_hlen == 6) {

-               register const struct ether_header *eh;
-               register const char *e;
-

                TCHECK2(bp->bp_chaddr[0], 6);
                TCHECK2(bp->bp_chaddr[0], 6);

-               eh = (struct ether_header *)packetp;
-               if (bp->bp_op == BOOTREQUEST)
-                       e = (const char *)ESRC(eh);
-               else if (bp->bp_op == BOOTREPLY)
-                       e = (const char *)EDST(eh);
-               else
-                       e = 0;
-               if (e == 0 || memcmp((char *)bp->bp_chaddr, e, 6) != 0)
-                       printf(" ether %s", etheraddr_string(bp->bp_chaddr));
+               printf("\n\t  Client-Ethernet-Address %s", etheraddr_string(bp->bp_chaddr));

        }
 
        TCHECK2(bp->bp_sname[0], 1);            /* check first char only */
        if (*bp->bp_sname) {
        }
 
        TCHECK2(bp->bp_sname[0], 1);            /* check first char only */
        if (*bp->bp_sname) {

-               printf(" sname \"");
+               printf("\n\t  sname \"");

                if (fn_print(bp->bp_sname, snapend)) {
                        putchar('"');
                        fputs(tstr + 1, stdout);
                if (fn_print(bp->bp_sname, snapend)) {
                        putchar('"');
                        fputs(tstr + 1, stdout);


@@ -151,9 +142,9 @@ bootp_print(register const u_char *cp, u_int length,
                }
                putchar('"');
        }
                }
                putchar('"');
        }

-       TCHECK2(bp->bp_sname[0], 1);            /* check first char only */
+       TCHECK2(bp->bp_file[0], 1);             /* check first char only */

        if (*bp->bp_file) {
        if (*bp->bp_file) {

-               printf(" file \"");
+               printf("\n\t  file \"");

                if (fn_print(bp->bp_file, snapend)) {
                        putchar('"');
                        fputs(tstr + 1, stdout);
                if (fn_print(bp->bp_file, snapend)) {
                        putchar('"');
                        fputs(tstr + 1, stdout);


@@ -164,19 +155,18 @@ bootp_print(register const u_char *cp, u_int length,
 
        /* Decode the vendor buffer */
        TCHECK(bp->bp_vend[0]);
 
        /* Decode the vendor buffer */
        TCHECK(bp->bp_vend[0]);

-       length -= sizeof(*bp) - sizeof(bp->bp_vend);
-       if (memcmp((char *)bp->bp_vend, (char *)vm_rfc1048,
+       if (memcmp((const char *)bp->bp_vend, vm_rfc1048,

                 sizeof(u_int32_t)) == 0)
                 sizeof(u_int32_t)) == 0)

-               rfc1048_print(bp->bp_vend, length);
-       else if (memcmp((char *)bp->bp_vend, (char *)vm_cmu,
+               rfc1048_print(bp->bp_vend);
+       else if (memcmp((const char *)bp->bp_vend, vm_cmu,

                      sizeof(u_int32_t)) == 0)
                      sizeof(u_int32_t)) == 0)

-               cmu_print(bp->bp_vend, length);
+               cmu_print(bp->bp_vend);

        else {
                u_int32_t ul;
 
                ul = EXTRACT_32BITS(&bp->bp_vend);
                if (ul != 0)
        else {
                u_int32_t ul;
 
                ul = EXTRACT_32BITS(&bp->bp_vend);
                if (ul != 0)

-                       printf("vend-#0x%x", ul);
+                       printf("\n\t  Vendor-#0x%x", ul);

        }
 
        return;
        }
 
        return;


@@ -200,23 +190,23 @@ trunc:
 static struct tok tag2str[] = {
 /* RFC1048 tags */
        { TAG_PAD,              " PAD" },
 static struct tok tag2str[] = {
 /* RFC1048 tags */
        { TAG_PAD,              " PAD" },

-       { TAG_SUBNET_MASK,      "iSM" },        /* subnet mask (RFC950) */
-       { TAG_TIME_OFFSET,      "LTZ" },        /* seconds from UTC */
-       { TAG_GATEWAY,          "iDG" },        /* default gateway */
-       { TAG_TIME_SERVER,      "iTS" },        /* time servers (RFC868) */
-       { TAG_NAME_SERVER,      "iIEN" },       /* IEN name servers (IEN116) */
-       { TAG_DOMAIN_SERVER,    "iNS" },        /* domain name (RFC1035) */
+       { TAG_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_LOG_SERVER,       "iLOG" },       /* MIT log servers */
        { TAG_COOKIE_SERVER,    "iCS" },        /* cookie servers (RFC865) */

-       { TAG_LPR_SERVER,       "iLPR" },       /* lpr server (RFC1179) */
+       { TAG_LPR_SERVER,       "iLPR-Server" },        /* lpr server (RFC1179) */

        { TAG_IMPRESS_SERVER,   "iIM" },        /* impress servers (Imagen) */
        { TAG_RLP_SERVER,       "iRL" },        /* resource location (RFC887) */
        { TAG_IMPRESS_SERVER,   "iIM" },        /* impress servers (Imagen) */
        { TAG_RLP_SERVER,       "iRL" },        /* resource location (RFC887) */

-       { TAG_HOSTNAME,         "aHN" },        /* ascii hostname */
+       { TAG_HOSTNAME,         "aHostname" },  /* ascii hostname */

        { TAG_BOOTSIZE,         "sBS" },        /* 512 byte blocks */
        { TAG_END,              " END" },
 /* RFC1497 tags */
        { TAG_DUMPPATH,         "aDP" },
        { TAG_BOOTSIZE,         "sBS" },        /* 512 byte blocks */
        { TAG_END,              " END" },
 /* RFC1497 tags */
        { TAG_DUMPPATH,         "aDP" },

-       { TAG_DOMAINNAME,       "aDN" },
+       { TAG_DOMAINNAME,       "aDomain-Name" },

        { TAG_SWAP_SERVER,      "iSS" },
        { TAG_ROOTPATH,         "aRP" },
        { TAG_EXTPATH,          "aEP" },
        { TAG_SWAP_SERVER,      "iSS" },
        { TAG_ROOTPATH,         "aRP" },
        { TAG_EXTPATH,          "aEP" },


@@ -226,16 +216,16 @@ static struct tok tag2str[] = {
        { TAG_PFILTERS,         "pPF" },
        { TAG_REASS_SIZE,       "sRSZ" },
        { TAG_DEF_TTL,          "bTTL" },
        { TAG_PFILTERS,         "pPF" },
        { TAG_REASS_SIZE,       "sRSZ" },
        { TAG_DEF_TTL,          "bTTL" },

-       { TAG_MTU_TIMEOUT,      "lMA" },
-       { TAG_MTU_TABLE,        "sMT" },
+       { 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_INT_MTU,          "sMTU" },
        { TAG_LOCAL_SUBNETS,    "BLSN" },
        { TAG_BROAD_ADDR,       "iBR" },
        { TAG_DO_MASK_DISC,     "BMD" },
        { TAG_SUPPLY_MASK,      "BMS" },

-       { TAG_DO_RDISC,         "BRD" },
+       { TAG_DO_RDISC,         "BRouter-Discovery" },

        { TAG_RTR_SOL_ADDR,     "iRSA" },
        { TAG_RTR_SOL_ADDR,     "iRSA" },

-       { TAG_STATIC_ROUTE,     "pSR" },
+       { TAG_STATIC_ROUTE,     "pStatic-Route" },

        { TAG_USE_TRAILERS,     "BUT" },
        { TAG_ARP_TIMEOUT,      "lAT" },
        { TAG_ETH_ENCAP,        "BIE" },
        { TAG_USE_TRAILERS,     "BUT" },
        { TAG_ARP_TIMEOUT,      "lAT" },
        { TAG_ETH_ENCAP,        "BIE" },


@@ -245,11 +235,11 @@ static struct tok tag2str[] = {
        { TAG_NIS_DOMAIN,       "aYD" },
        { TAG_NIS_SERVERS,      "iYS" },
        { TAG_NTP_SERVERS,      "iNTP" },
        { TAG_NIS_DOMAIN,       "aYD" },
        { TAG_NIS_SERVERS,      "iYS" },
        { TAG_NTP_SERVERS,      "iNTP" },

-       { TAG_VENDOR_OPTS,      "bVO" },
-       { TAG_NETBIOS_NS,       "iWNS" },
+       { TAG_VENDOR_OPTS,      "bVendor-Option" },
+       { TAG_NETBIOS_NS,       "iNetbios-Name-Server" },

        { TAG_NETBIOS_DDS,      "iWDD" },
        { TAG_NETBIOS_DDS,      "iWDD" },

-       { TAG_NETBIOS_NODE,     "$WNT" },
-       { TAG_NETBIOS_SCOPE,    "aWSC" },
+       { TAG_NETBIOS_NODE,     "$Netbios-Node" },
+       { TAG_NETBIOS_SCOPE,    "aNetbios-Scope" },

        { TAG_XWIN_FS,          "iXFS" },
        { TAG_XWIN_DM,          "iXDM" },
        { TAG_NIS_P_DOMAIN,     "sN+D" },
        { TAG_XWIN_FS,          "iXFS" },
        { TAG_XWIN_DM,          "iXDM" },
        { TAG_NIS_P_DOMAIN,     "sN+D" },


@@ -263,20 +253,20 @@ static struct tok tag2str[] = {
        { TAG_IRC_SERVER,       "iIRC" },
        { TAG_STREETTALK_SRVR,  "iSTS" },
        { TAG_STREETTALK_STDA,  "iSTDA" },
        { TAG_IRC_SERVER,       "iIRC" },
        { TAG_STREETTALK_SRVR,  "iSTS" },
        { TAG_STREETTALK_STDA,  "iSTDA" },

-       { TAG_REQUESTED_IP,     "iRQ" },
-       { TAG_IP_LEASE,         "lLT" },
+       { TAG_REQUESTED_IP,     "iRequested-IP" },
+       { TAG_IP_LEASE,         "lLease-Time" },

        { TAG_OPT_OVERLOAD,     "$OO" },
        { TAG_TFTP_SERVER,      "aTFTP" },
        { TAG_BOOTFILENAME,     "aBF" },
        { TAG_OPT_OVERLOAD,     "$OO" },
        { TAG_TFTP_SERVER,      "aTFTP" },
        { TAG_BOOTFILENAME,     "aBF" },

-       { TAG_DHCP_MESSAGE,     " DHCP" },
-       { TAG_SERVER_ID,        "iSID" },
-       { TAG_PARM_REQUEST,     "bPR" },
+       { 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_MESSAGE,          "aMSG" },
        { TAG_MAX_MSG_SIZE,     "sMSZ" },
        { TAG_RENEWAL_TIME,     "lRN" },
        { TAG_REBIND_TIME,      "lRB" },

-       { TAG_VENDOR_CLASS,     "aVC" },
-       { TAG_CLIENT_ID,        "$CID" },
+       { TAG_VENDOR_CLASS,     "aVendor-Class" },
+       { TAG_CLIENT_ID,        "$Client-ID" },

 /* RFC 2485 */
        { TAG_OPEN_GROUP_UAP,   "aUAP" },
 /* RFC 2563 */
 /* RFC 2485 */
        { TAG_OPEN_GROUP_UAP,   "aUAP" },
 /* RFC 2563 */


@@ -288,11 +278,14 @@ static struct tok tag2str[] = {
        { TAG_NS_SEARCH,        "sNSSEARCH" },  /* XXX 's' */
 /* RFC 3011 */
        { TAG_IP4_SUBNET_SELECT, "iSUBNET" },
        { TAG_NS_SEARCH,        "sNSSEARCH" },  /* XXX 's' */
 /* RFC 3011 */
        { TAG_IP4_SUBNET_SELECT, "iSUBNET" },

-/* ftp://ftp.isi.edu/.../assignments/bootp-dhcp-extensions */
+/* 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" },
        { TAG_SLP_NAMING_AUTH,  "aSLP-NA" },
        { TAG_CLIENT_FQDN,      "$FQDN" },
        { TAG_USER_CLASS,       "aCLASS" },
        { TAG_SLP_NAMING_AUTH,  "aSLP-NA" },
        { TAG_CLIENT_FQDN,      "$FQDN" },

-       { TAG_AGENT_CIRCUIT,    "bACKT" },
+       { TAG_AGENT_CIRCUIT,    "$Agent-Information" },

        { TAG_AGENT_REMOTE,     "bARMT" },
        { TAG_AGENT_MASK,       "bAMSK" },
        { TAG_TZ_STRING,        "aTZSTR" },
        { TAG_AGENT_REMOTE,     "bARMT" },
        { TAG_AGENT_MASK,       "bAMSK" },
        { TAG_TZ_STRING,        "aTZSTR" },


@@ -347,28 +340,53 @@ static struct tok arp2str[] = {
        { 0,                    NULL }
 };
 
        { 0,                    NULL }
 };
 

+static 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 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
 static void

-rfc1048_print(register const u_char *bp, register u_int length)
+rfc1048_print(register const u_char *bp)

 {
 {

-       register u_char tag;
-       register u_int len, size;
+       register u_int16_t tag;
+       register u_int len;

        register const char *cp;
        register char c;
        register const char *cp;
        register char c;

-       int first;
+       int first, idx;

        u_int32_t ul;
        u_int32_t ul;

-       u_short us;
+       u_int16_t us;
+       u_int8_t uc, subopt, suboptlen;

 
 

-       printf(" vend-rfc1048");
+       printf("\n\t  Vendor-rfc1048 Extensions");

 
        /* Step over magic cookie */
 
        /* Step over magic cookie */

+        printf("\n\t    Magic Cookie 0x%08x", EXTRACT_32BITS(bp));

        bp += sizeof(int32_t);
 
        /* Loop while we there is a tag left in the buffer */
        bp += sizeof(int32_t);
 
        /* Loop while we there is a tag left in the buffer */

-       while (bp + 1 < snapend) {
+       while (TTEST2(*bp, 1)) {

                tag = *bp++;
                tag = *bp++;

-               if (tag == TAG_PAD)
+               if (tag == TAG_PAD && vflag < 3)

                        continue;
                        continue;

-               if (tag == TAG_END)
+               if (tag == TAG_END && vflag < 3)

                        return;
                if (tag == TAG_EXTENDED_OPTION) {
                        TCHECK2(*(bp + 1), 2);
                        return;
                if (tag == TAG_EXTENDED_OPTION) {
                        TCHECK2(*(bp + 1), 2);


@@ -377,58 +395,65 @@ rfc1048_print(register const u_char *bp, register u_int length)
                         * preclude overlap of 1-byte and 2-byte spaces.
                         * If not, we need to offset tag after this step.
                         */
                         * preclude overlap of 1-byte and 2-byte spaces.
                         * If not, we need to offset tag after this step.
                         */

-                       cp = tok2str(xtag2str, "?xT%d", tag);
+                       cp = tok2str(xtag2str, "?xT%u", tag);

                } else
                } else

-                       cp = tok2str(tag2str, "?T%d", tag);
+                       cp = tok2str(tag2str, "?T%u", tag);

                c = *cp++;
                c = *cp++;

-               printf(" %s:", cp);

 
 

-               /* Get the length; check for truncation */
-               if (bp + 1 >= snapend) {
-                       fputs(tstr, stdout);
-                       return;
+               if (tag == TAG_PAD || tag == TAG_END)
+                       len = 0;
+               else {
+                       /* Get the length; check for truncation */
+                       TCHECK2(*bp, 1);
+                       len = *bp++;
+               }
+
+               printf("\n\t    %s Option %u, length %u%s", cp, tag, len,
+                   len > 0 ? ": " : "");
+
+               if (tag == TAG_PAD && vflag > 2) {
+                       u_int ntag = 1;
+                       while (TTEST2(*bp, 1) && *bp == TAG_PAD) {
+                               bp++;
+                               ntag++;
+                       }
+                       if (ntag > 1)
+                               printf(", occurs %u", ntag);

                }
                }

-               len = *bp++;
-               if (bp + len >= snapend) {
-                       fputs(tstr, stdout);
+
+               if (!TTEST2(*bp, len)) {
+                       printf("[|rfc1048 %u]", len);

                        return;
                }
 
                if (tag == TAG_DHCP_MESSAGE && len == 1) {
                        return;
                }
 
                if (tag == TAG_DHCP_MESSAGE && len == 1) {

-                       c = *bp++;
-                       switch (c) {
-                       case DHCPDISCOVER:      printf("DISCOVER");     break;
-                       case DHCPOFFER:         printf("OFFER");        break;
-                       case DHCPREQUEST:       printf("REQUEST");      break;
-                       case DHCPDECLINE:       printf("DECLINE");      break;
-                       case DHCPACK:           printf("ACK");          break;
-                       case DHCPNAK:           printf("NACK");         break;
-                       case DHCPRELEASE:       printf("RELEASE");      break;
-                       case DHCPINFORM:        printf("INFORM");       break;
-                       default:                printf("%u", c);        break;
-                       }
-                       continue;
+                       uc = *bp++;
+                        printf("%s", tok2str(dhcp_msg_values, "Unknown (%u)", uc));
+                        continue;

                }
 
                if (tag == TAG_PARM_REQUEST) {
                }
 
                if (tag == TAG_PARM_REQUEST) {

-                       first = 1;
+                       idx = 0;

                        while (len-- > 0) {
                        while (len-- > 0) {

-                               c = *bp++;
-                               cp = tok2str(tag2str, "?T%d", c);
-                               if (!first)
-                                       putchar('+');
+                               uc = *bp++;
+                               cp = tok2str(tag2str, "?Option %u", uc);
+                               if (idx % 4 == 0)
+                                       printf("\n\t      ");
+                               else
+                                       printf(", ");

                                printf("%s", cp + 1);
                                printf("%s", cp + 1);

-                               first = 0;
+                               idx++;

                        }
                        continue;
                }
                        }
                        continue;
                }

+

                if (tag == TAG_EXTENDED_REQUEST) {
                        first = 1;
                        while (len > 1) {
                                len -= 2;
                if (tag == TAG_EXTENDED_REQUEST) {
                        first = 1;
                        while (len > 1) {
                                len -= 2;

-                               c = EXTRACT_16BITS(bp);
+                               us = EXTRACT_16BITS(bp);

                                bp += 2;
                                bp += 2;

-                               cp = tok2str(xtag2str, "?xT%d", c);
+                               cp = tok2str(xtag2str, "?xT%u", us);

                                if (!first)
                                        putchar('+');
                                printf("%s", cp + 1);
                                if (!first)
                                        putchar('+');
                                printf("%s", cp + 1);


@@ -438,12 +463,11 @@ rfc1048_print(register const u_char *bp, register u_int length)
                }
 
                /* Print data */
                }
 
                /* Print data */

-               size = len;

                if (c == '?') {
                        /* Base default formats for unknown tags on data size */
                if (c == '?') {
                        /* Base default formats for unknown tags on data size */

-                       if (size & 1)
+                       if (len & 1)

                                c = 'b';
                                c = 'b';

-                       else if (size & 2)
+                       else if (len & 2)

                                c = 's';
                        else
                                c = 'l';
                                c = 's';
                        else
                                c = 'l';


@@ -454,17 +478,20 @@ rfc1048_print(register const u_char *bp, register u_int length)
                case 'a':
                        /* ascii strings */
                        putchar('"');
                case 'a':
                        /* ascii strings */
                        putchar('"');

-                       (void)fn_printn(bp, size, NULL);
+                       if (fn_printn(bp, len, snapend)) {
+                               putchar('"');
+                               goto trunc;
+                       }

                        putchar('"');
                        putchar('"');

-                       bp += size;
-                       size = 0;
+                       bp += len;
+                       len = 0;

                        break;
 
                case 'i':
                case 'l':
                case 'L':
                        /* ip addresses/32-bit words */
                        break;
 
                case 'i':
                case 'l':
                case 'L':
                        /* ip addresses/32-bit words */

-                       while (size >= sizeof(ul)) {
+                       while (len >= sizeof(ul)) {

                                if (!first)
                                        putchar(',');
                                ul = EXTRACT_32BITS(bp);
                                if (!first)
                                        putchar(',');
                                ul = EXTRACT_32BITS(bp);


@@ -476,43 +503,43 @@ rfc1048_print(register const u_char *bp, register u_int length)
                                else
                                        printf("%u", ul);
                                bp += sizeof(ul);
                                else
                                        printf("%u", ul);
                                bp += sizeof(ul);

-                               size -= sizeof(ul);
+                               len -= sizeof(ul);

                                first = 0;
                        }
                        break;
 
                case 'p':
                        /* IP address pairs */
                                first = 0;
                        }
                        break;
 
                case 'p':
                        /* IP address pairs */

-                       while (size >= 2*sizeof(ul)) {
+                       while (len >= 2*sizeof(ul)) {

                                if (!first)
                                        putchar(',');
                                if (!first)
                                        putchar(',');

-                               memcpy((char *)&ul, (char *)bp, sizeof(ul));
+                               memcpy((char *)&ul, (const char *)bp, sizeof(ul));

                                printf("(%s:", ipaddr_string(&ul));
                                bp += sizeof(ul);
                                printf("(%s:", ipaddr_string(&ul));
                                bp += sizeof(ul);

-                               memcpy((char *)&ul, (char *)bp, sizeof(ul));
+                               memcpy((char *)&ul, (const char *)bp, sizeof(ul));

                                printf("%s)", ipaddr_string(&ul));
                                bp += sizeof(ul);
                                printf("%s)", ipaddr_string(&ul));
                                bp += sizeof(ul);

-                               size -= 2*sizeof(ul);
+                               len -= 2*sizeof(ul);

                                first = 0;
                        }
                        break;
 
                case 's':
                        /* shorts */
                                first = 0;
                        }
                        break;
 
                case 's':
                        /* shorts */

-                       while (size >= sizeof(us)) {
+                       while (len >= sizeof(us)) {

                                if (!first)
                                        putchar(',');
                                us = EXTRACT_16BITS(bp);
                                if (!first)
                                        putchar(',');
                                us = EXTRACT_16BITS(bp);

-                               printf("%d", us);
+                               printf("%u", us);

                                bp += sizeof(us);
                                bp += sizeof(us);

-                               size -= sizeof(us);
+                               len -= sizeof(us);

                                first = 0;
                        }
                        break;
 
                case 'B':
                        /* boolean */
                                first = 0;
                        }
                        break;
 
                case 'B':
                        /* boolean */

-                       while (size > 0) {
+                       while (len > 0) {

                                if (!first)
                                        putchar(',');
                                switch (*bp) {
                                if (!first)
                                        putchar(',');
                                switch (*bp) {


@@ -523,11 +550,11 @@ rfc1048_print(register const u_char *bp, register u_int length)
                                        putchar('Y');
                                        break;
                                default:
                                        putchar('Y');
                                        break;
                                default:

-                                       printf("%d?", *bp);
+                                       printf("%u?", *bp);

                                        break;
                                }
                                ++bp;
                                        break;
                                }
                                ++bp;

-                               --size;
+                               --len;

                                first = 0;
                        }
                        break;
                                first = 0;
                        }
                        break;


@@ -536,15 +563,15 @@ rfc1048_print(register const u_char *bp, register u_int length)
                case 'x':
                default:
                        /* Bytes */
                case 'x':
                default:
                        /* Bytes */

-                       while (size > 0) {
+                       while (len > 0) {

                                if (!first)
                                        putchar(c == 'x' ? ':' : '.');
                                if (c == 'x')
                                        printf("%02x", *bp);
                                else
                                if (!first)
                                        putchar(c == 'x' ? ':' : '.');
                                if (c == 'x')
                                        printf("%02x", *bp);
                                else

-                                       printf("%d", *bp);
+                                       printf("%u", *bp);

                                ++bp;
                                ++bp;

-                               --size;
+                               --len;

                                first = 0;
                        }
                        break;
                                first = 0;
                        }
                        break;


@@ -554,64 +581,193 @@ rfc1048_print(register const u_char *bp, register u_int length)
                        switch (tag) {
 
                        case TAG_NETBIOS_NODE:
                        switch (tag) {
 
                        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);
+                                       break;
+                               }

                                tag = *bp++;
                                tag = *bp++;

-                               --size;
+                               --len;

                                fputs(tok2str(nbo2str, NULL, tag), stdout);
                                break;
 
                        case TAG_OPT_OVERLOAD:
                                fputs(tok2str(nbo2str, NULL, tag), stdout);
                                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);
+                                       break;
+                               }

                                tag = *bp++;
                                tag = *bp++;

-                               --size;
+                               --len;

                                fputs(tok2str(oo2str, NULL, tag), stdout);
                                break;
 
                        case TAG_CLIENT_FQDN:
                                fputs(tok2str(oo2str, NULL, tag), stdout);
                                break;
 
                        case TAG_CLIENT_FQDN:

-                               if (*bp++)
-                                       printf("[svrreg]");
+                               /* this option should be at least 3 bytes long */
+                               if (len < 3)  {
+                                       printf("ERROR: option %u len %u < 3 bytes",
+                                           TAG_CLIENT_FQDN, len);
+                                       bp += len;
+                                       len = 0;
+                                       break;
+                               }

                                if (*bp)
                                if (*bp)

-                                       printf("%d/%d/", *bp, *(bp+1));
+                                       printf("[%s] ", client_fqdn_flags(*bp));
+                               bp++;
+                               if (*bp || *(bp+1))
+                                       printf("%u/%u ", *bp, *(bp+1));

                                bp += 2;
                                putchar('"');
                                bp += 2;
                                putchar('"');

-                               (void)fn_printn(bp, size - 3, NULL);
+                               if (fn_printn(bp, len - 3, snapend)) {
+                                       putchar('"');
+                                       goto trunc;
+                               }

                                putchar('"');
                                putchar('"');

-                               bp += size - 3;
-                               size = 0;
+                               bp += len - 3;
+                               len = 0;

                                break;
 
                        case TAG_CLIENT_ID:
                                break;
 
                        case TAG_CLIENT_ID:

-                           {   int type = *bp++;
-                               size--;
+                           {   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);
+                                       break;
+                               }
+                               type = *bp++;
+                               len--;

                                if (type == 0) {
                                        putchar('"');
                                if (type == 0) {
                                        putchar('"');

-                                       (void)fn_printn(bp, size, NULL);  
+                                       if (fn_printn(bp, len, snapend)) {
+                                               putchar('"');
+                                               goto trunc;
+                                       }

                                        putchar('"');
                                        putchar('"');

+                                       bp += len;
+                                       len = 0;

                                        break;
                                } else {
                                        break;
                                } else {

-                                       printf("[%s]", tok2str(arp2str, "type-%d", type));
+                                       printf("%s ", tok2str(arp2str, "hardware-type %u,", type));
+                                       while (len > 0) {
+                                               if (!first)
+                                                       putchar(':');
+                                               printf("%02x", *bp);
+                                               ++bp;
+                                               --len;
+                                               first = 0;
+                                       }

                                }
                                }

-                               while (size > 0) {
+                               break;
+                           }
+
+                       case TAG_AGENT_CIRCUIT:
+                               while (len >= 2) {
+                                       subopt = *bp++;
+                                       suboptlen = *bp++;
+                                       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);
+                                               bp += len;
+                                               len = 0;
+                                               break;
+                                       }
+                                       printf("\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;
+
+                                       default:
+                                               print_unknown_data(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)  {
+                                       printf("ERROR: option %u len %u < 5 bytes",
+                                           TAG_CLASSLESS_STATIC_RT, len);
+                                       bp += len;
+                                       len = 0;
+                                       break;
+                               }
+                               while (len > 0) {

                                        if (!first)
                                        if (!first)

-                                               putchar(':');
-                                       printf("%02x", *bp);
-                                       ++bp;
-                                       --size;
+                                               putchar(',');
+                                       mask_width = *bp++;
+                                       len--;
+                                       /* mask_width <= 32 */
+                                       if (mask_width > 32) {
+                                               printf("[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) {
+                                               printf("[ERROR: Remaining length (%u) < %u bytes]",  len, significant_octets + 4);
+                                               bp += len;
+                                               len = 0;
+                                               break;
+                                       }
+                                       putchar('(');
+                                       if (mask_width == 0)
+                                               printf("default");
+                                       else {
+                                               for (i = 0; i < significant_octets ; i++) {
+                                                       if (i > 0)
+                                                               putchar('.');
+                                                       printf("%d", *bp++);
+                                               }
+                                               for (i = significant_octets ; i < 4 ; i++)
+                                                       printf(".0");
+                                               printf("/%d", mask_width);
+                                       }
+                                       memcpy((char *)&ul, (const char *)bp, sizeof(ul));
+                                       printf(":%s)", ipaddr_string(&ul));
+                                       bp += sizeof(ul);
+                                       len -= (significant_octets + 4);

                                        first = 0;
                                }
                                        first = 0;
                                }

-                               break;
-                           }
+                       }
+                       break;

 
                        default:
 
                        default:

-                               printf("[unknown special tag %d, size %d]",
-                                   tag, size);
-                               bp += size;
-                               size = 0;
+                               printf("[unknown special tag %u, size %u]",
+                                   tag, len);
+                               bp += len;
+                               len = 0;

                                break;
                        }
                        break;
                }
                /* Data left over? */
                                break;
                        }
                        break;
                }
                /* Data left over? */

-               if (size)
-                       printf("[len %d]", len);
+               if (len) {
+                       printf("\n\t  trailing data length %u", len);
+                       bp += len;
+               }

        }
        return;
 trunc:
        }
        return;
 trunc:


@@ -619,7 +775,7 @@ trunc:
 }
 
 static void
 }
 
 static void

-cmu_print(register const u_char *bp, register u_int length)
+cmu_print(register const u_char *bp)

 {
        register const struct cmu_vend *cmu;
 
 {
        register const struct cmu_vend *cmu;
 


@@ -628,7 +784,7 @@ cmu_print(register const u_char *bp, register u_int length)
        printf(" %s:%s", s, ipaddr_string(&cmu->m.s_addr)); }
 
        printf(" vend-cmu");
        printf(" %s:%s", s, ipaddr_string(&cmu->m.s_addr)); }
 
        printf(" vend-cmu");

-       cmu = (struct cmu_vend *)bp;
+       cmu = (const struct cmu_vend *)bp;

 
        /* Only print if there are unknown bits */
        TCHECK(cmu->v_flags);
 
        /* Only print if there are unknown bits */
        TCHECK(cmu->v_flags);


@@ -648,3 +804,22 @@ trunc:
        fputs(tstr, stdout);
 #undef PRINTCMUADDR
 }
        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;
+}