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-rw-r--r--print-bootp.c425
1 files changed, 345 insertions, 80 deletions
diff --git a/print-bootp.c b/print-bootp.c
index 4da4f95250b7..fe0a070ca093 100644
--- a/print-bootp.c
+++ b/print-bootp.c
@@ -33,23 +33,246 @@
#include "interface.h"
#include "addrtoname.h"
#include "extract.h"
-#include "bootp.h"
static const char tstr[] = " [|bootp]";
+/*
+ * Bootstrap Protocol (BOOTP). RFC951 and RFC1048.
+ *
+ * This file specifies the "implementation-independent" BOOTP protocol
+ * information which is common to both client and server.
+ *
+ * Copyright 1988 by Carnegie Mellon.
+ *
+ * Permission to use, copy, modify, and distribute this program for any
+ * purpose and without fee is hereby granted, provided that this copyright
+ * and permission notice appear on all copies and supporting documentation,
+ * the name of Carnegie Mellon not be used in advertising or publicity
+ * pertaining to distribution of the program without specific prior
+ * permission, and notice be given in supporting documentation that copying
+ * and distribution is by permission of Carnegie Mellon and Stanford
+ * University. Carnegie Mellon makes no representations about the
+ * suitability of this software for any purpose. It is provided "as is"
+ * without express or implied warranty.
+ */
+
+struct bootp {
+ uint8_t bp_op; /* packet opcode type */
+ uint8_t bp_htype; /* hardware addr type */
+ uint8_t bp_hlen; /* hardware addr length */
+ uint8_t bp_hops; /* gateway hops */
+ uint32_t bp_xid; /* transaction ID */
+ uint16_t bp_secs; /* seconds since boot began */
+ uint16_t bp_flags; /* flags - see bootp_flag_values[]
+ in print-bootp.c */
+ struct in_addr bp_ciaddr; /* client IP address */
+ struct in_addr bp_yiaddr; /* 'your' IP address */
+ struct in_addr bp_siaddr; /* server IP address */
+ struct in_addr bp_giaddr; /* gateway IP address */
+ uint8_t bp_chaddr[16]; /* client hardware address */
+ uint8_t bp_sname[64]; /* server host name */
+ uint8_t bp_file[128]; /* boot file name */
+ uint8_t bp_vend[64]; /* vendor-specific area */
+} UNALIGNED;
+
+#define BOOTPREPLY 2
+#define BOOTPREQUEST 1
+
+/*
+ * Vendor magic cookie (v_magic) for CMU
+ */
+#define VM_CMU "CMU"
+
+/*
+ * Vendor magic cookie (v_magic) for RFC1048
+ */
+#define VM_RFC1048 { 99, 130, 83, 99 }
+
+/*
+ * RFC1048 tag values used to specify what information is being supplied in
+ * the vendor field of the packet.
+ */
+
+#define TAG_PAD ((uint8_t) 0)
+#define TAG_SUBNET_MASK ((uint8_t) 1)
+#define TAG_TIME_OFFSET ((uint8_t) 2)
+#define TAG_GATEWAY ((uint8_t) 3)
+#define TAG_TIME_SERVER ((uint8_t) 4)
+#define TAG_NAME_SERVER ((uint8_t) 5)
+#define TAG_DOMAIN_SERVER ((uint8_t) 6)
+#define TAG_LOG_SERVER ((uint8_t) 7)
+#define TAG_COOKIE_SERVER ((uint8_t) 8)
+#define TAG_LPR_SERVER ((uint8_t) 9)
+#define TAG_IMPRESS_SERVER ((uint8_t) 10)
+#define TAG_RLP_SERVER ((uint8_t) 11)
+#define TAG_HOSTNAME ((uint8_t) 12)
+#define TAG_BOOTSIZE ((uint8_t) 13)
+#define TAG_END ((uint8_t) 255)
+/* RFC1497 tags */
+#define TAG_DUMPPATH ((uint8_t) 14)
+#define TAG_DOMAINNAME ((uint8_t) 15)
+#define TAG_SWAP_SERVER ((uint8_t) 16)
+#define TAG_ROOTPATH ((uint8_t) 17)
+#define TAG_EXTPATH ((uint8_t) 18)
+/* RFC2132 */
+#define TAG_IP_FORWARD ((uint8_t) 19)
+#define TAG_NL_SRCRT ((uint8_t) 20)
+#define TAG_PFILTERS ((uint8_t) 21)
+#define TAG_REASS_SIZE ((uint8_t) 22)
+#define TAG_DEF_TTL ((uint8_t) 23)
+#define TAG_MTU_TIMEOUT ((uint8_t) 24)
+#define TAG_MTU_TABLE ((uint8_t) 25)
+#define TAG_INT_MTU ((uint8_t) 26)
+#define TAG_LOCAL_SUBNETS ((uint8_t) 27)
+#define TAG_BROAD_ADDR ((uint8_t) 28)
+#define TAG_DO_MASK_DISC ((uint8_t) 29)
+#define TAG_SUPPLY_MASK ((uint8_t) 30)
+#define TAG_DO_RDISC ((uint8_t) 31)
+#define TAG_RTR_SOL_ADDR ((uint8_t) 32)
+#define TAG_STATIC_ROUTE ((uint8_t) 33)
+#define TAG_USE_TRAILERS ((uint8_t) 34)
+#define TAG_ARP_TIMEOUT ((uint8_t) 35)
+#define TAG_ETH_ENCAP ((uint8_t) 36)
+#define TAG_TCP_TTL ((uint8_t) 37)
+#define TAG_TCP_KEEPALIVE ((uint8_t) 38)
+#define TAG_KEEPALIVE_GO ((uint8_t) 39)
+#define TAG_NIS_DOMAIN ((uint8_t) 40)
+#define TAG_NIS_SERVERS ((uint8_t) 41)
+#define TAG_NTP_SERVERS ((uint8_t) 42)
+#define TAG_VENDOR_OPTS ((uint8_t) 43)
+#define TAG_NETBIOS_NS ((uint8_t) 44)
+#define TAG_NETBIOS_DDS ((uint8_t) 45)
+#define TAG_NETBIOS_NODE ((uint8_t) 46)
+#define TAG_NETBIOS_SCOPE ((uint8_t) 47)
+#define TAG_XWIN_FS ((uint8_t) 48)
+#define TAG_XWIN_DM ((uint8_t) 49)
+#define TAG_NIS_P_DOMAIN ((uint8_t) 64)
+#define TAG_NIS_P_SERVERS ((uint8_t) 65)
+#define TAG_MOBILE_HOME ((uint8_t) 68)
+#define TAG_SMPT_SERVER ((uint8_t) 69)
+#define TAG_POP3_SERVER ((uint8_t) 70)
+#define TAG_NNTP_SERVER ((uint8_t) 71)
+#define TAG_WWW_SERVER ((uint8_t) 72)
+#define TAG_FINGER_SERVER ((uint8_t) 73)
+#define TAG_IRC_SERVER ((uint8_t) 74)
+#define TAG_STREETTALK_SRVR ((uint8_t) 75)
+#define TAG_STREETTALK_STDA ((uint8_t) 76)
+/* DHCP options */
+#define TAG_REQUESTED_IP ((uint8_t) 50)
+#define TAG_IP_LEASE ((uint8_t) 51)
+#define TAG_OPT_OVERLOAD ((uint8_t) 52)
+#define TAG_TFTP_SERVER ((uint8_t) 66)
+#define TAG_BOOTFILENAME ((uint8_t) 67)
+#define TAG_DHCP_MESSAGE ((uint8_t) 53)
+#define TAG_SERVER_ID ((uint8_t) 54)
+#define TAG_PARM_REQUEST ((uint8_t) 55)
+#define TAG_MESSAGE ((uint8_t) 56)
+#define TAG_MAX_MSG_SIZE ((uint8_t) 57)
+#define TAG_RENEWAL_TIME ((uint8_t) 58)
+#define TAG_REBIND_TIME ((uint8_t) 59)
+#define TAG_VENDOR_CLASS ((uint8_t) 60)
+#define TAG_CLIENT_ID ((uint8_t) 61)
+/* RFC 2241 */
+#define TAG_NDS_SERVERS ((uint8_t) 85)
+#define TAG_NDS_TREE_NAME ((uint8_t) 86)
+#define TAG_NDS_CONTEXT ((uint8_t) 87)
+/* RFC 2242 */
+#define TAG_NDS_IPDOMAIN ((uint8_t) 62)
+#define TAG_NDS_IPINFO ((uint8_t) 63)
+/* RFC 2485 */
+#define TAG_OPEN_GROUP_UAP ((uint8_t) 98)
+/* RFC 2563 */
+#define TAG_DISABLE_AUTOCONF ((uint8_t) 116)
+/* RFC 2610 */
+#define TAG_SLP_DA ((uint8_t) 78)
+#define TAG_SLP_SCOPE ((uint8_t) 79)
+/* RFC 2937 */
+#define TAG_NS_SEARCH ((uint8_t) 117)
+/* RFC 3004 - The User Class Option for DHCP */
+#define TAG_USER_CLASS ((uint8_t) 77)
+/* RFC 3011 */
+#define TAG_IP4_SUBNET_SELECT ((uint8_t) 118)
+/* RFC 3442 */
+#define TAG_CLASSLESS_STATIC_RT ((uint8_t) 121)
+#define TAG_CLASSLESS_STA_RT_MS ((uint8_t) 249)
+/* RFC 5859 - TFTP Server Address Option for DHCPv4 */
+#define TAG_TFTP_SERVER_ADDRESS ((uint8_t) 150)
+/* ftp://ftp.isi.edu/.../assignments/bootp-dhcp-extensions */
+#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_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)
+#define TAG_PRINTER_NAME ((uint8_t) 100)
+#define TAG_MDHCP_SERVER ((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)
+
+/* DHCP Message types (values for TAG_DHCP_MESSAGE option) */
+#define DHCPDISCOVER 1
+#define DHCPOFFER 2
+#define DHCPREQUEST 3
+#define DHCPDECLINE 4
+#define DHCPACK 5
+#define DHCPNAK 6
+#define DHCPRELEASE 7
+#define DHCPINFORM 8
+
+/*
+ * "vendor" data permitted for CMU bootp clients.
+ */
+
+struct cmu_vend {
+ uint8_t v_magic[4]; /* magic number */
+ uint32_t v_flags; /* flags/opcodes, etc. */
+ struct in_addr v_smask; /* Subnet mask */
+ struct in_addr v_dgate; /* Default gateway */
+ struct in_addr v_dns1, v_dns2; /* Domain name servers */
+ struct in_addr v_ins1, v_ins2; /* IEN-116 name servers */
+ struct in_addr v_ts1, v_ts2; /* Time servers */
+ uint8_t v_unused[24]; /* currently unused */
+} UNALIGNED;
+
+
+/* v_flags values */
+#define VF_SMASK 1 /* Subnet mask field contains valid data */
+
+/* RFC 4702 DHCP Client FQDN Option */
+
+#define CLIENT_FQDN_FLAGS_S 0x01
+#define CLIENT_FQDN_FLAGS_O 0x02
+#define CLIENT_FQDN_FLAGS_E 0x04
+#define CLIENT_FQDN_FLAGS_N 0x08
+/* end of original bootp.h */
+
static 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" },
- { 0, NULL}
+ { 0x8000, "Broadcast" },
+ { 0, NULL}
};
static const struct tok bootp_op_values[] = {
- { BOOTPREQUEST, "Request" },
- { BOOTPREPLY, "Reply" },
- { 0, NULL}
+ { BOOTPREQUEST, "Request" },
+ { BOOTPREPLY, "Reply" },
+ { 0, NULL}
};
/*
@@ -57,7 +280,7 @@ static const struct tok bootp_op_values[] = {
*/
void
bootp_print(netdissect_options *ndo,
- register const u_char *cp, u_int length)
+ register const u_char *cp, u_int length)
{
register const struct bootp *bp;
static const u_char vm_cmu[4] = VM_CMU;
@@ -67,7 +290,7 @@ bootp_print(netdissect_options *ndo,
ND_TCHECK(bp->bp_op);
ND_PRINT((ndo, "BOOTP/DHCP, %s",
- tok2str(bootp_op_values, "unknown (0x%02x)", bp->bp_op)));
+ tok2str(bootp_op_values, "unknown (0x%02x)", bp->bp_op)));
if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) {
ND_TCHECK2(bp->bp_chaddr[0], 6);
@@ -98,7 +321,7 @@ bootp_print(netdissect_options *ndo,
ND_PRINT((ndo, ", secs %d", EXTRACT_16BITS(&bp->bp_secs)));
ND_PRINT((ndo, ", Flags [%s]",
- bittok2str(bootp_flag_values, "none", EXTRACT_16BITS(&bp->bp_flags))));
+ bittok2str(bootp_flag_values, "none", EXTRACT_16BITS(&bp->bp_flags))));
if (ndo->ndo_vflag > 1)
ND_PRINT((ndo, " (0x%04x)", EXTRACT_16BITS(&bp->bp_flags)));
@@ -152,10 +375,10 @@ bootp_print(netdissect_options *ndo,
/* Decode the vendor buffer */
ND_TCHECK(bp->bp_vend[0]);
if (memcmp((const char *)bp->bp_vend, vm_rfc1048,
- sizeof(uint32_t)) == 0)
+ sizeof(uint32_t)) == 0)
rfc1048_print(ndo, bp->bp_vend);
else if (memcmp((const char *)bp->bp_vend, vm_cmu,
- sizeof(uint32_t)) == 0)
+ sizeof(uint32_t)) == 0)
cmu_print(ndo, bp->bp_vend);
else {
uint32_t ul;
@@ -272,13 +495,16 @@ static const struct tok tag2str[] = {
{ TAG_SLP_SCOPE, "bSLP-SCOPE" }, /*"b" is a little wrong */
/* RFC 2937 */
{ TAG_NS_SEARCH, "sNSSEARCH" }, /* XXX 's' */
+/* RFC 3004 - The User Class Option for DHCP */
+ { TAG_USER_CLASS, "$User-Class" },
/* RFC 3011 */
{ TAG_IP4_SUBNET_SELECT, "iSUBNET" },
/* RFC 3442 */
{ TAG_CLASSLESS_STATIC_RT, "$Classless-Static-Route" },
{ TAG_CLASSLESS_STA_RT_MS, "$Classless-Static-Route-Microsoft" },
+/* RFC 5859 - TFTP Server Address Option for DHCPv4 */
+ { TAG_TFTP_SERVER_ADDRESS, "iTFTP-Server-Address" },
/* http://www.iana.org/assignments/bootp-dhcp-extensions/index.htm */
- { TAG_USER_CLASS, "aCLASS" },
{ TAG_SLP_NAMING_AUTH, "aSLP-NA" },
{ TAG_CLIENT_FQDN, "$FQDN" },
{ TAG_AGENT_CIRCUIT, "$Agent-Information" },
@@ -301,67 +527,67 @@ static const struct tok tag2str[] = {
{ TAG_NETINFO_PARENT_TAG, "aNITAG" },
{ TAG_URL, "aURL" },
{ TAG_FAILOVER, "bFAIL" }, /* XXX 'b' */
- { 0, NULL }
+ { 0, NULL }
};
/* 2-byte extended tags */
static const struct tok xtag2str[] = {
- { 0, NULL }
+ { 0, NULL }
};
/* DHCP "options overload" types */
static const struct tok oo2str[] = {
- { 1, "file" },
- { 2, "sname" },
- { 3, "file+sname" },
- { 0, NULL }
+ { 1, "file" },
+ { 2, "sname" },
+ { 3, "file+sname" },
+ { 0, NULL }
};
/* NETBIOS over TCP/IP node type options */
static const struct tok nbo2str[] = {
- { 0x1, "b-node" },
- { 0x2, "p-node" },
- { 0x4, "m-node" },
- { 0x8, "h-node" },
- { 0, NULL }
+ { 0x1, "b-node" },
+ { 0x2, "p-node" },
+ { 0x4, "m-node" },
+ { 0x8, "h-node" },
+ { 0, NULL }
};
/* ARP Hardware types, for Client-ID option */
static const struct tok arp2str[] = {
- { 0x1, "ether" },
- { 0x6, "ieee802" },
- { 0x7, "arcnet" },
- { 0xf, "frelay" },
- { 0x17, "strip" },
- { 0x18, "ieee1394" },
- { 0, NULL }
+ { 0x1, "ether" },
+ { 0x6, "ieee802" },
+ { 0x7, "arcnet" },
+ { 0xf, "frelay" },
+ { 0x17, "strip" },
+ { 0x18, "ieee1394" },
+ { 0, NULL }
};
static const struct tok dhcp_msg_values[] = {
- { DHCPDISCOVER, "Discover" },
- { DHCPOFFER, "Offer" },
- { DHCPREQUEST, "Request" },
- { DHCPDECLINE, "Decline" },
- { DHCPACK, "ACK" },
- { DHCPNAK, "NACK" },
- { DHCPRELEASE, "Release" },
- { DHCPINFORM, "Inform" },
- { 0, NULL }
+ { DHCPDISCOVER, "Discover" },
+ { DHCPOFFER, "Offer" },
+ { DHCPREQUEST, "Request" },
+ { DHCPDECLINE, "Decline" },
+ { DHCPACK, "ACK" },
+ { DHCPNAK, "NACK" },
+ { DHCPRELEASE, "Release" },
+ { DHCPINFORM, "Inform" },
+ { 0, NULL }
};
-#define AGENT_SUBOPTION_CIRCUIT_ID 1 /* RFC 3046 */
-#define AGENT_SUBOPTION_REMOTE_ID 2 /* RFC 3046 */
-#define AGENT_SUBOPTION_SUBSCRIBER_ID 6 /* RFC 3993 */
+#define AGENT_SUBOPTION_CIRCUIT_ID 1 /* RFC 3046 */
+#define AGENT_SUBOPTION_REMOTE_ID 2 /* RFC 3046 */
+#define AGENT_SUBOPTION_SUBSCRIBER_ID 6 /* RFC 3993 */
static const struct tok agent_suboption_values[] = {
- { AGENT_SUBOPTION_CIRCUIT_ID, "Circuit-ID" },
- { AGENT_SUBOPTION_REMOTE_ID, "Remote-ID" },
- { AGENT_SUBOPTION_SUBSCRIBER_ID, "Subscriber-ID" },
- { 0, NULL }
+ { AGENT_SUBOPTION_CIRCUIT_ID, "Circuit-ID" },
+ { AGENT_SUBOPTION_REMOTE_ID, "Remote-ID" },
+ { AGENT_SUBOPTION_SUBSCRIBER_ID, "Subscriber-ID" },
+ { 0, NULL }
};
static void
rfc1048_print(netdissect_options *ndo,
- register const u_char *bp)
+ register const u_char *bp)
{
register uint16_t tag;
register u_int len;
@@ -406,7 +632,7 @@ rfc1048_print(netdissect_options *ndo,
}
ND_PRINT((ndo, "\n\t %s Option %u, length %u%s", cp, tag, len,
- len > 0 ? ": " : ""));
+ len > 0 ? ": " : ""));
if (tag == TAG_PAD && ndo->ndo_vflag > 2) {
u_int ntag = 1;
@@ -579,9 +805,8 @@ rfc1048_print(netdissect_options *ndo,
case TAG_NETBIOS_NODE:
/* this option should be at least 1 byte long */
- if (len < 1) {
- ND_PRINT((ndo, "ERROR: option %u len %u < 1 bytes",
- TAG_NETBIOS_NODE, len));
+ if (len < 1) {
+ ND_PRINT((ndo, "ERROR: length < 1 bytes"));
break;
}
tag = *bp++;
@@ -591,9 +816,8 @@ rfc1048_print(netdissect_options *ndo,
case TAG_OPT_OVERLOAD:
/* this option should be at least 1 byte long */
- if (len < 1) {
- ND_PRINT((ndo, "ERROR: option %u len %u < 1 bytes",
- TAG_OPT_OVERLOAD, len));
+ if (len < 1) {
+ ND_PRINT((ndo, "ERROR: length < 1 bytes"));
break;
}
tag = *bp++;
@@ -603,9 +827,8 @@ rfc1048_print(netdissect_options *ndo,
case TAG_CLIENT_FQDN:
/* this option should be at least 3 bytes long */
- if (len < 3) {
- ND_PRINT((ndo, "ERROR: option %u len %u < 3 bytes",
- TAG_CLIENT_FQDN, len));
+ if (len < 3) {
+ ND_PRINT((ndo, "ERROR: length < 3 bytes"));
bp += len;
len = 0;
break;
@@ -627,12 +850,12 @@ rfc1048_print(netdissect_options *ndo,
break;
case TAG_CLIENT_ID:
- { int type;
+ {
+ int type;
/* this option should be at least 1 byte long */
- if (len < 1) {
- ND_PRINT((ndo, "ERROR: option %u len %u < 1 bytes",
- TAG_CLIENT_ID, len));
+ if (len < 1) {
+ ND_PRINT((ndo, "ERROR: length < 1 bytes"));
break;
}
type = *bp++;
@@ -668,23 +891,24 @@ rfc1048_print(netdissect_options *ndo,
len -= 2;
if (suboptlen > len) {
ND_PRINT((ndo, "\n\t %s SubOption %u, length %u: length goes past end of option",
- tok2str(agent_suboption_values, "Unknown", subopt),
- subopt,
- suboptlen));
+ tok2str(agent_suboption_values, "Unknown", subopt),
+ subopt,
+ suboptlen));
bp += len;
len = 0;
break;
}
ND_PRINT((ndo, "\n\t %s SubOption %u, length %u: ",
- tok2str(agent_suboption_values, "Unknown", subopt),
- subopt,
- suboptlen));
+ 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(ndo, bp, suboptlen, NULL);
+ if (fn_printn(ndo, bp, suboptlen, ndo->ndo_snapend))
+ goto trunc;
break;
default:
@@ -693,18 +917,17 @@ rfc1048_print(netdissect_options *ndo,
len -= suboptlen;
bp += suboptlen;
- }
- break;
+ }
+ break;
case TAG_CLASSLESS_STATIC_RT:
case TAG_CLASSLESS_STA_RT_MS:
- {
+ {
u_int mask_width, significant_octets, i;
/* this option should be at least 5 bytes long */
- if (len < 5) {
- ND_PRINT((ndo, "ERROR: option %u len %u < 5 bytes",
- TAG_CLASSLESS_STATIC_RT, len));
+ if (len < 5) {
+ ND_PRINT((ndo, "ERROR: length < 5 bytes"));
bp += len;
len = 0;
break;
@@ -716,7 +939,7 @@ rfc1048_print(netdissect_options *ndo,
len--;
/* mask_width <= 32 */
if (mask_width > 32) {
- ND_PRINT((ndo, "[ERROR: Mask width (%d) > 32]", mask_width));
+ ND_PRINT((ndo, "[ERROR: Mask width (%d) > 32]", mask_width));
bp += len;
len = 0;
break;
@@ -724,7 +947,7 @@ rfc1048_print(netdissect_options *ndo,
significant_octets = (mask_width + 7) / 8;
/* significant octets + router(4) */
if (len < significant_octets + 4) {
- ND_PRINT((ndo, "[ERROR: Remaining length (%u) < %u bytes]", len, significant_octets + 4));
+ ND_PRINT((ndo, "[ERROR: Remaining length (%u) < %u bytes]", len, significant_octets + 4));
bp += len;
len = 0;
break;
@@ -748,12 +971,54 @@ rfc1048_print(netdissect_options *ndo,
len -= (significant_octets + 4);
first = 0;
}
- }
- break;
+ break;
+ }
+
+ case TAG_USER_CLASS:
+ {
+ u_int suboptnumber = 1;
+
+ first = 1;
+ if (len < 2) {
+ ND_PRINT((ndo, "ERROR: length < 2 bytes"));
+ bp += len;
+ len = 0;
+ break;
+ }
+ while (len > 0) {
+ suboptlen = *bp++;
+ len--;
+ ND_PRINT((ndo, "\n\t "));
+ ND_PRINT((ndo, "instance#%u: ", suboptnumber));
+ if (suboptlen == 0) {
+ ND_PRINT((ndo, "ERROR: suboption length must be non-zero"));
+ bp += len;
+ len = 0;
+ break;
+ }
+ if (len < suboptlen) {
+ ND_PRINT((ndo, "ERROR: malformed option"));
+ bp += len;
+ len = 0;
+ break;
+ }
+ ND_PRINT((ndo, "\""));
+ if (fn_printn(ndo, bp, suboptlen, ndo->ndo_snapend)) {
+ ND_PRINT((ndo, "\""));
+ goto trunc;
+ }
+ ND_PRINT((ndo, "\""));
+ ND_PRINT((ndo, ", length %d", suboptlen));
+ suboptnumber++;
+ len -= suboptlen;
+ bp += suboptlen;
+ }
+ break;
+ }
default:
ND_PRINT((ndo, "[unknown special tag %u, size %u]",
- tag, len));
+ tag, len));
bp += len;
len = 0;
break;
@@ -773,7 +1038,7 @@ trunc:
static void
cmu_print(netdissect_options *ndo,
- register const u_char *bp)
+ register const u_char *bp)
{
register const struct cmu_vend *cmu;
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-22 16:12:29 +0000