Allow tcpdump to work with earlier libpcaps.

[tcpdump] / print-bootp.c

diff --git a/print-bootp.c b/print-bootp.c
index adbf015bf6a1f45b95d75437b0842df04ee0f912..641b8febd675229538412af1fbe0922bbdf43313 100644 (file)
--- a/print-bootp.c
+++ b/print-bootp.c
@@ -22,7 +22,7 @@
  */
 #ifndef lint
 static const char rcsid[] =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-bootp.c,v 1.52 2000-09-28 06:42:56 guy Exp $ (LBL)";
+    "@(#) $Header: /tcpdump/master/tcpdump/print-bootp.c,v 1.56 2000-12-04 00:00:08 fenner Exp $ (LBL)";
 #endif
 
 #ifdef HAVE_CONFIG_H
@@ -44,6 +44,7 @@ struct rtentry;
 
 #include "interface.h"
 #include "addrtoname.h"
+#include "extract.h"
 #include "ether.h"
 #include "bootp.h"
 
@@ -173,7 +174,7 @@ bootp_print(register const u_char *cp, u_int length,
        else {
                u_int32_t ul;
 
-               memcpy((char *)&ul, (char *)bp->bp_vend, sizeof(ul));
+               ul = EXTRACT_32BITS(&bp->bp_vend);
                if (ul != 0)
                        printf("vend-#0x%x", ul);
        }
@@ -188,7 +189,7 @@ static struct tok tag2str[] = {
 /* RFC1048 tags */
        { TAG_PAD,              " PAD" },
        { TAG_SUBNET_MASK,      "iSM" },        /* subnet mask (RFC950) */
-       { TAG_TIME_OFFSET,      "lTZ" },        /* seconds from UTC */
+       { 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) */
@@ -264,6 +265,45 @@ static struct tok tag2str[] = {
        { TAG_REBIND_TIME,      "lRB" },
        { TAG_VENDOR_CLASS,     "bVC" },
        { TAG_CLIENT_ID,        "xCID" },
+/* RFC 2485 */
+       { TAG_OPEN_GROUP_UAP,   "aUAP" },
+/* RFC 2563 */
+       { TAG_DISABLE_AUTOCONF, "BNOAUTO" },
+/* RFC 2610 */
+       { TAG_SLP_DA,           "bSLP-DA" },    /*"b" is a little wrong */
+       { TAG_SLP_SCOPE,        "bSLP-SCOPE" }, /*"b" is a little wrong */
+/* RFC 2937 */
+       { TAG_NS_SEARCH,        "sNSSEARCH" },  /* XXX 's' */
+/* RFC 3011 */
+       { TAG_IP4_SUBNET_SELECT, "iSUBNET" },
+/* ftp://ftp.isi.edu/.../assignments/bootp-dhcp-extensions */
+       { TAG_USER_CLASS,       "aCLASS" },
+       { TAG_SLP_NAMING_AUTH,  "aSLP-NA" },
+       { TAG_CLIENT_FQDN,      "bFQDN" },      /* XXX 'b' */
+       { TAG_AGENT_CIRCUIT,    "bACKT" },
+       { TAG_AGENT_REMOTE,     "bARMT" },
+       { TAG_AGENT_MASK,       "bAMSK" },
+       { TAG_TZ_STRING,        "aTZSTR" },
+       { TAG_FQDN_OPTION,      "bFQDNS" },     /* XXX 'b' */
+       { TAG_AUTH,             "bAUTH" },      /* XXX 'b' */
+       { TAG_VINES_SERVERS,    "iVINES" },
+       { TAG_SERVER_RANK,      "sRANK" },
+       { TAG_CLIENT_ARCH,      "sARCH" },
+       { TAG_CLIENT_NDI,       "bNDI" },       /* XXX 'b' */
+       { TAG_CLIENT_GUID,      "bGUID" },      /* XXX 'b' */
+       { TAG_LDAP_URL,         "aLDAP" },
+       { TAG_6OVER4,           "i6o4" },
+       { TAG_PRINTER_NAME,     "aPRTR" },
+       { TAG_MDHCP_SERVER,     "bMDHCP" },     /* XXX 'b' */
+       { TAG_IPX_COMPAT,       "bIPX" },       /* XXX 'b' */
+       { TAG_NETINFO_PARENT,   "iNI" },
+       { TAG_NETINFO_PARENT_TAG, "aNITAG" },
+       { TAG_URL,              "aURL" },
+       { TAG_FAILOVER,         "bFAIL" },      /* XXX 'b' */
+       { 0,                    NULL }
+};
+/* 2-byte extended tags */
+static struct tok xtag2str[] = {
        { 0,                    NULL }
 };
 
@@ -290,7 +330,16 @@ rfc1048_print(register const u_char *bp, register u_int length)
                        continue;
                if (tag == TAG_END)
                        return;
-               cp = tok2str(tag2str, "?T%d", tag);
+               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%d", tag);
+               } else
+                       cp = tok2str(tag2str, "?T%d", tag);
                c = *cp++;
                printf(" %s:", cp);
 
@@ -325,7 +374,21 @@ rfc1048_print(register const u_char *bp, register u_int length)
                        first = 1;
                        while (len-- > 0) {
                                c = *bp++;
-                               cp = tok2str(tag2str, "?%d", c);
+                               cp = tok2str(tag2str, "?T%d", c);
+                               if (!first)
+                                       putchar('+');
+                               printf("%s", cp + 1);
+                               first = 0;
+                       }
+                       continue;
+               }
+               if (tag == TAG_EXTENDED_REQUEST) {
+                       first = 1;
+                       while (len > 1) {
+                               len -= 2;
+                               c = EXTRACT_16BITS(bp);
+                               bp += 2;
+                               cp = tok2str(xtag2str, "?xT%d", c);
                                if (!first)
                                        putchar('+');
                                printf("%s", cp + 1);
@@ -359,13 +422,17 @@ rfc1048_print(register const u_char *bp, register u_int length)
 
                case 'i':
                case 'l':
+               case 'L':
                        /* ip addresses/32-bit words */
                        while (size >= sizeof(ul)) {
                                if (!first)
                                        putchar(',');
-                               memcpy((char *)&ul, (char *)bp, sizeof(ul));
-                               if (c == 'i')
+                               ul = EXTRACT_32BITS(bp);
+                               if (c == 'i') {
+                                       ul = htonl(ul);
                                        printf("%s", ipaddr_string(&ul));
+                               } else if (c == 'L')
+                                       printf("%d", ul);
                                else
                                        printf("%u", ul);
                                bp += sizeof(ul);
@@ -395,7 +462,7 @@ rfc1048_print(register const u_char *bp, register u_int length)
                        while (size >= sizeof(us)) {
                                if (!first)
                                        putchar(',');
-                               memcpy((char *)&us, (char *)bp, sizeof(us));
+                               us = EXTRACT_16BITS(bp);
                                printf("%d", us);
                                bp += sizeof(us);
                                size -= sizeof(us);
@@ -443,6 +510,9 @@ rfc1048_print(register const u_char *bp, register u_int length)
                if (size)
                        printf("[len %d]", len);
        }
+       return;
+trunc:
+       printf("|[rfc1048]");
 }
 
 static void