*/
#ifndef lint
static const char rcsid[] _U_ =
- "@(#) $Header: /tcpdump/master/tcpdump/print-bootp.c,v 1.85 2007-01-29 20:55:01 guy Exp $ (LBL)";
+ "@(#) $Header: /tcpdump/master/tcpdump/print-bootp.c,v 1.86 2007-07-24 17:28:56 guy Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
{ TAG_NS_SEARCH, "sNSSEARCH" }, /* XXX 's' */
/* RFC 3011 */
{ TAG_IP4_SUBNET_SELECT, "iSUBNET" },
+/* RFC 3442 */
+ { TAG_CLASSLESS_STATIC_RT, "$Classless-Static-Route" },
/* http://www.iana.org/assignments/bootp-dhcp-extensions/index.htm */
{ TAG_USER_CLASS, "aCLASS" },
{ TAG_SLP_NAMING_AUTH, "aSLP-NA" },
rfc1048_print(register const u_char *bp)
{
register u_int16_t tag;
- register u_int len, size;
+ register u_int len;
register const char *cp;
register char c;
int first, idx;
}
/* Print data */
- size = len;
if (c == '?') {
/* Base default formats for unknown tags on data size */
- if (size & 1)
+ if (len & 1)
c = 'b';
- else if (size & 2)
+ else if (len & 2)
c = 's';
else
c = 'l';
case 'a':
/* ascii strings */
putchar('"');
- if (fn_printn(bp, size, snapend)) {
+ if (fn_printn(bp, len, snapend)) {
putchar('"');
goto trunc;
}
putchar('"');
- bp += size;
- size = 0;
+ bp += len;
+ len = 0;
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);
else
printf("%u", ul);
bp += sizeof(ul);
- size -= sizeof(ul);
+ len -= sizeof(ul);
first = 0;
}
break;
case 'p':
/* IP address pairs */
- while (size >= 2*sizeof(ul)) {
+ while (len >= 2*sizeof(ul)) {
if (!first)
putchar(',');
memcpy((char *)&ul, (const char *)bp, sizeof(ul));
memcpy((char *)&ul, (const char *)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 */
- while (size >= sizeof(us)) {
+ while (len >= sizeof(us)) {
if (!first)
putchar(',');
us = EXTRACT_16BITS(bp);
printf("%u", us);
bp += sizeof(us);
- size -= sizeof(us);
+ len -= sizeof(us);
first = 0;
}
break;
case 'B':
/* boolean */
- while (size > 0) {
+ while (len > 0) {
if (!first)
putchar(',');
switch (*bp) {
break;
}
++bp;
- --size;
+ --len;
first = 0;
}
break;
case 'x':
default:
/* Bytes */
- while (size > 0) {
+ while (len > 0) {
if (!first)
putchar(c == 'x' ? ':' : '.');
if (c == 'x')
else
printf("%u", *bp);
++bp;
- --size;
+ --len;
first = 0;
}
break;
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);
+ bp += len;
+ len = 0;
+ break;
+ }
tag = *bp++;
- --size;
+ --len;
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);
+ bp += len;
+ len = 0;
+ break;
+ }
tag = *bp++;
- --size;
+ --len;
fputs(tok2str(oo2str, NULL, tag), stdout);
break;
case TAG_CLIENT_FQDN:
- /* option 81 should be at least 3 bytes long */
+ /* this option should be at least 3 bytes long */
if (len < 3) {
- printf("ERROR: option 81 len %u < 3 bytes", len);
+ printf("ERROR: option %u len %u < 3 bytes",
+ TAG_CLIENT_FQDN, len);
+ bp += len;
+ len = 0;
break;
}
if (*bp)
printf("%u/%u ", *bp, *(bp+1));
bp += 2;
putchar('"');
- if (fn_printn(bp, size - 3, snapend)) {
+ if (fn_printn(bp, len - 3, snapend)) {
putchar('"');
goto trunc;
}
putchar('"');
- bp += size - 3;
- size = 0;
+ bp += len - 3;
+ len = 0;
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);
+ bp += len;
+ len = 0;
+ break;
+ }
+ type = *bp++;
+ len--;
if (type == 0) {
putchar('"');
- if (fn_printn(bp, size, snapend)) {
+ if (fn_printn(bp, len, snapend)) {
putchar('"');
goto trunc;
}
putchar('"');
- bp += size;
- size = 0;
+ bp += len;
+ len = 0;
break;
} else {
printf("%s ", tok2str(arp2str, "hardware-type %u,", type));
- }
- while (size > 0) {
- if (!first)
- putchar(':');
- printf("%02x", *bp);
- ++bp;
- --size;
- first = 0;
+ while (len > 0) {
+ if (!first)
+ putchar(':');
+ printf("%02x", *bp);
+ ++bp;
+ --len;
+ first = 0;
+ }
}
break;
}
- case TAG_AGENT_CIRCUIT:
- {
- while (size > 0 ) {
- subopt = *bp++;
- suboptlen = *bp++;
- size -= 2;
- printf("\n\t %s SubOption %u, length %u: ",
- tok2str(agent_suboption_values, "Unknown", subopt),
- subopt,
- suboptlen);
-
- if (subopt == 0 || suboptlen == 0) {
- break;
- }
-
- switch(subopt) {
- case AGENT_SUBOPTION_CIRCUIT_ID:
- for (idx = 0; idx < suboptlen; idx++) {
- safeputchar(*(bp+idx));
- }
- break;
- default:
- print_unknown_data(bp, "\n\t\t", suboptlen);
- }
-
- size -= suboptlen;
- bp += suboptlen;
- }
- }
- 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:
+ 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:
+ {
+ 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)
+ 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;
+ }
+ }
+ break;
default:
printf("[unknown special tag %u, size %u]",
- tag, size);
- bp += size;
- size = 0;
+ tag, len);
+ bp += len;
+ len = 0;
break;
}
break;
}
/* Data left over? */
- if (size) {
+ if (len) {
printf("\n\t trailing data length %u", len);
- bp += size;
+ bp += len;
}
}
return;
projects / tcpdump / commitdiff
