/* \summary: BOOTP and IPv4 DHCP printer */
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
+#include <config.h>
-#include <netdissect-stdinc.h>
+#include "netdissect-stdinc.h"
#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.
*/
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[]
+ nd_uint8_t bp_op; /* packet opcode type */
+ nd_uint8_t bp_htype; /* hardware addr type */
+ nd_uint8_t bp_hlen; /* hardware addr length */
+ nd_uint8_t bp_hops; /* gateway hops */
+ nd_uint32_t bp_xid; /* transaction ID */
+ nd_uint16_t bp_secs; /* seconds since boot began */
+ nd_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;
+ nd_ipv4 bp_ciaddr; /* client IP address */
+ nd_ipv4 bp_yiaddr; /* 'your' IP address */
+ nd_ipv4 bp_siaddr; /* server IP address */
+ nd_ipv4 bp_giaddr; /* gateway IP address */
+ nd_byte bp_chaddr[16]; /* client hardware address */
+ nd_byte bp_sname[64]; /* server host name */
+ nd_byte bp_file[128]; /* boot file name */
+ nd_byte bp_vend[64]; /* vendor-specific area */
+};
#define BOOTPREPLY 2
#define BOOTPREQUEST 1
#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_SMTP_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)
/* RFC 2485 */
#define TAG_OPEN_GROUP_UAP ((uint8_t) 98)
/* RFC 2563 */
-#define TAG_DISABLE_AUTOCONF ((uint8_t) 116)
+#define TAG_AUTO_CONFIGURE ((uint8_t) 116)
/* RFC 2610 */
#define TAG_SLP_DA ((uint8_t) 78)
#define TAG_SLP_SCOPE ((uint8_t) 79)
+/* RFC 8925 */
+#define TAG_IPV6_ONLY_PREFERRED ((uint8_t) 108)
/* RFC 2937 */
#define TAG_NS_SEARCH ((uint8_t) 117)
/* RFC 3004 - The User Class Option for DHCP */
/* RFC 3442 */
#define TAG_CLASSLESS_STATIC_RT ((uint8_t) 121)
#define TAG_CLASSLESS_STA_RT_MS ((uint8_t) 249)
+/* RFC8572 */
+#define TAG_SZTP_REDIRECT ((uint8_t) 143)
/* 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_TZ_PCODE ((uint8_t) 100)
+#define TAG_TZ_TCODE ((uint8_t) 101)
#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) */
#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.
*/
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;
+ nd_byte v_magic[4]; /* magic number */
+ nd_uint32_t v_flags; /* flags/opcodes, etc. */
+ nd_ipv4 v_smask; /* Subnet mask */
+ nd_ipv4 v_dgate; /* Default gateway */
+ nd_ipv4 v_dns1, v_dns2; /* Domain name servers */
+ nd_ipv4 v_ins1, v_ins2; /* IEN-116 name servers */
+ nd_ipv4 v_ts1, v_ts2; /* Time servers */
+ nd_byte v_unused[24]; /* currently unused */
+};
/* v_flags values */
#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" },
*/
void
bootp_print(netdissect_options *ndo,
- register const u_char *cp, u_int length)
+ const u_char *cp, u_int length)
{
- register const struct bootp *bp;
+ const struct bootp *bp;
static const u_char vm_cmu[4] = VM_CMU;
static const u_char vm_rfc1048[4] = VM_RFC1048;
+ uint8_t bp_op, bp_htype, bp_hlen;
+ ndo->ndo_protocol = "bootp";
bp = (const struct bootp *)cp;
- ND_TCHECK(bp->bp_op);
-
- ND_PRINT((ndo, "BOOTP/DHCP, %s",
- tok2str(bootp_op_values, "unknown (0x%02x)", bp->bp_op)));
-
- ND_TCHECK(bp->bp_hlen);
- if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) {
- ND_TCHECK2(bp->bp_chaddr[0], 6);
- ND_PRINT((ndo, " from %s", etheraddr_string(ndo, bp->bp_chaddr)));
+ bp_op = GET_U_1(bp->bp_op);
+ ND_PRINT("BOOTP/DHCP, %s",
+ tok2str(bootp_op_values, "unknown (0x%02x)", bp_op));
+
+ bp_htype = GET_U_1(bp->bp_htype);
+ bp_hlen = GET_U_1(bp->bp_hlen);
+ if (bp_htype == 1 && bp_hlen == MAC48_LEN && bp_op == BOOTPREQUEST) {
+ ND_PRINT(" from %s", GET_MAC48_STRING(bp->bp_chaddr));
}
- ND_PRINT((ndo, ", length %u", length));
+ ND_PRINT(", length %u", length);
if (!ndo->ndo_vflag)
return;
- ND_TCHECK(bp->bp_secs);
+ ND_TCHECK_2(bp->bp_secs);
/* The usual hardware address type is 1 (10Mb Ethernet) */
- if (bp->bp_htype != 1)
- ND_PRINT((ndo, ", htype %d", bp->bp_htype));
+ if (bp_htype != 1)
+ ND_PRINT(", htype %u", bp_htype);
/* The usual length for 10Mb Ethernet address is 6 bytes */
- if (bp->bp_htype != 1 || bp->bp_hlen != 6)
- ND_PRINT((ndo, ", hlen %d", bp->bp_hlen));
+ if (bp_htype != 1 || bp_hlen != MAC48_LEN)
+ ND_PRINT(", hlen %u", bp_hlen);
/* Only print interesting fields */
- if (bp->bp_hops)
- ND_PRINT((ndo, ", hops %d", bp->bp_hops));
- if (EXTRACT_BE_32BITS(&bp->bp_xid))
- ND_PRINT((ndo, ", xid 0x%x", EXTRACT_BE_32BITS(&bp->bp_xid)));
- if (EXTRACT_BE_16BITS(&bp->bp_secs))
- ND_PRINT((ndo, ", secs %d", EXTRACT_BE_16BITS(&bp->bp_secs)));
-
- ND_TCHECK(bp->bp_flags);
- ND_PRINT((ndo, ", Flags [%s]",
- bittok2str(bootp_flag_values, "none", EXTRACT_BE_16BITS(&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", GET_BE_U_2(bp->bp_flags)));
if (ndo->ndo_vflag > 1)
- ND_PRINT((ndo, " (0x%04x)", EXTRACT_BE_16BITS(&bp->bp_flags)));
+ ND_PRINT(" (0x%04x)", GET_BE_U_2(bp->bp_flags));
/* Client's ip address */
- ND_TCHECK(bp->bp_ciaddr);
- if (EXTRACT_BE_32BITS(&bp->bp_ciaddr.s_addr))
- ND_PRINT((ndo, "\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(bp->bp_yiaddr);
- if (EXTRACT_BE_32BITS(&bp->bp_yiaddr.s_addr))
- ND_PRINT((ndo, "\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(bp->bp_siaddr);
- if (EXTRACT_BE_32BITS(&bp->bp_siaddr.s_addr))
- ND_PRINT((ndo, "\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(bp->bp_giaddr);
- if (EXTRACT_BE_32BITS(&bp->bp_giaddr.s_addr))
- ND_PRINT((ndo, "\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->bp_htype == 1 && bp->bp_hlen == 6) {
- ND_TCHECK2(bp->bp_chaddr[0], 6);
- ND_PRINT((ndo, "\n\t Client-Ethernet-Address %s", etheraddr_string(ndo, bp->bp_chaddr)));
+ if (bp_htype == 1 && bp_hlen == MAC48_LEN) {
+ ND_PRINT("\n\t Client-Ethernet-Address %s", GET_MAC48_STRING(bp->bp_chaddr));
}
- ND_TCHECK_1(bp->bp_sname); /* check first char only */
- if (EXTRACT_8BITS(bp->bp_sname)) {
- ND_PRINT((ndo, "\n\t sname \""));
- if (fn_printztn(ndo, bp->bp_sname, (u_int)sizeof bp->bp_sname,
- ndo->ndo_snapend)) {
- ND_PRINT((ndo, "\""));
- ND_PRINT((ndo, "%s", tstr + 1));
- return;
+ if (GET_U_1(bp->bp_sname)) { /* get first char only */
+ ND_PRINT("\n\t sname \"");
+ if (nd_printztn(ndo, bp->bp_sname, (u_int)sizeof(bp->bp_sname),
+ NULL) == 0) {
+ /* Within the buffer, but not NUL-terminated. */
+ ND_PRINT("\"");
+ goto invalid;
}
- ND_PRINT((ndo, "\""));
+ ND_PRINT("\"");
}
- ND_TCHECK_1(bp->bp_file); /* check first char only */
- if (EXTRACT_8BITS(bp->bp_file)) {
- ND_PRINT((ndo, "\n\t file \""));
- if (fn_printztn(ndo, bp->bp_file, (u_int)sizeof bp->bp_file,
- ndo->ndo_snapend)) {
- ND_PRINT((ndo, "\""));
- ND_PRINT((ndo, "%s", tstr + 1));
- return;
+ if (GET_U_1(bp->bp_file)) { /* get first char only */
+ ND_PRINT("\n\t file \"");
+ if (nd_printztn(ndo, bp->bp_file, (u_int)sizeof(bp->bp_file),
+ NULL) == 0) {
+ /* Ditto. */
+ ND_PRINT("\"");
+ goto invalid;
}
- ND_PRINT((ndo, "\""));
+ ND_PRINT("\"");
}
/* Decode the vendor buffer */
- ND_TCHECK(bp->bp_vend[0]);
+ ND_TCHECK_4(bp->bp_vend);
if (memcmp((const char *)bp->bp_vend, vm_rfc1048,
sizeof(uint32_t)) == 0)
rfc1048_print(ndo, bp->bp_vend);
else {
uint32_t ul;
- ul = EXTRACT_BE_32BITS(&bp->bp_vend);
+ ul = GET_BE_U_4(bp->bp_vend);
if (ul != 0)
- ND_PRINT((ndo, "\n\t Vendor-#0x%x", ul));
+ ND_PRINT("\n\t Vendor-#0x%x", ul);
}
-
return;
-trunc:
- ND_PRINT((ndo, "%s", tstr));
+invalid:
+ nd_print_invalid(ndo);
}
/*
* The first character specifies the format to print:
* i - ip address (32 bits)
* p - ip address pairs (32 bits + 32 bits)
- * 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)
+ * l - unsigned longs (32 bits)
+ * L - longs (32 bits)
+ * s - unsigned shorts (16 bits)
+ * 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)
{ TAG_NIS_P_DOMAIN, "sN+D" },
{ TAG_NIS_P_SERVERS, "iN+S" },
{ TAG_MOBILE_HOME, "iMH" },
- { TAG_SMPT_SERVER, "iSMTP" },
+ { TAG_SMTP_SERVER, "iSMTP" },
{ TAG_POP3_SERVER, "iPOP3" },
{ TAG_NNTP_SERVER, "iNNTP" },
{ TAG_WWW_SERVER, "iWWW" },
/* RFC 2485 */
{ TAG_OPEN_GROUP_UAP, "aUAP" },
/* RFC 2563 */
- { TAG_DISABLE_AUTOCONF, "BNOAUTO" },
+ { TAG_AUTO_CONFIGURE, "BAuto-Configure" },
/* RFC 2610 */
{ TAG_SLP_DA, "bSLP-DA" }, /*"b" is a little wrong */
{ TAG_SLP_SCOPE, "bSLP-SCOPE" }, /*"b" is a little wrong */
/* RFC 3442 */
{ TAG_CLASSLESS_STATIC_RT, "$Classless-Static-Route" },
{ TAG_CLASSLESS_STA_RT_MS, "$Classless-Static-Route-Microsoft" },
+/* RFC 8572 */
+ { TAG_SZTP_REDIRECT, "$SZTP-Redirect" },
/* RFC 5859 - TFTP Server Address Option for DHCPv4 */
{ TAG_TFTP_SERVER_ADDRESS, "iTFTP-Server-Address" },
-/* http://www.iana.org/assignments/bootp-dhcp-extensions/index.htm */
+/* https://www.iana.org/assignments/bootp-dhcp-parameters/bootp-dhcp-parameters.xhtml#options */
{ TAG_SLP_NAMING_AUTH, "aSLP-NA" },
{ TAG_CLIENT_FQDN, "$FQDN" },
{ TAG_AGENT_CIRCUIT, "$Agent-Information" },
{ TAG_AGENT_REMOTE, "bARMT" },
- { TAG_AGENT_MASK, "bAMSK" },
{ TAG_TZ_STRING, "aTZSTR" },
{ TAG_FQDN_OPTION, "bFQDNS" }, /* XXX 'b' */
{ TAG_AUTH, "bAUTH" }, /* XXX 'b' */
- { TAG_VINES_SERVERS, "iVINES" },
- { TAG_SERVER_RANK, "sRANK" },
+ { TAG_CLIENT_LAST_TRANSACTION_TIME, "lLast-Transaction-Time" },
+ { TAG_ASSOCIATED_IP, "iAssociated-IP" },
{ TAG_CLIENT_ARCH, "sARCH" },
{ TAG_CLIENT_NDI, "bNDI" }, /* XXX 'b' */
{ TAG_CLIENT_GUID, "bGUID" }, /* XXX 'b' */
{ TAG_LDAP_URL, "aLDAP" },
- { TAG_6OVER4, "i6o4" },
- { TAG_TZ_PCODE, "aPOSIX-TZ" },
- { TAG_TZ_TCODE, "aTZ-Name" },
- { TAG_IPX_COMPAT, "bIPX" }, /* XXX 'b' */
+ { TAG_TZ_PCODE, "aPOSIX-TZ" },
+ { TAG_TZ_TCODE, "aTZ-Name" },
{ TAG_NETINFO_PARENT, "iNI" },
{ TAG_NETINFO_PARENT_TAG, "aNITAG" },
{ TAG_URL, "aURL" },
- { TAG_FAILOVER, "bFAIL" }, /* XXX 'b' */
{ TAG_MUDURL, "aMUD-URL" },
- { 0, NULL }
-};
-/* 2-byte extended tags */
-static const struct tok xtag2str[] = {
+ { TAG_IPV6_ONLY_PREFERRED, "$IPv6-Only-Preferred" },
{ 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" },
+ { 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 }
};
static void
rfc1048_print(netdissect_options *ndo,
- register const u_char *bp)
+ const u_char *bp)
{
- register uint16_t tag;
- register u_int len;
- register const char *cp;
- register char c;
+ uint16_t tag;
+ u_int len;
+ const char *cp;
+ char c;
int first, idx;
- uint32_t ul;
- uint16_t us;
- uint8_t uc, subopt, suboptlen;
+ uint8_t subopt, suboptlen;
- ND_PRINT((ndo, "\n\t Vendor-rfc1048 Extensions"));
+ ND_PRINT("\n\t Vendor-rfc1048 Extensions");
/* Step over magic cookie */
- ND_PRINT((ndo, "\n\t Magic Cookie 0x%08x", EXTRACT_BE_32BITS(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_8BITS(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_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%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_8BITS(bp);
+ len = GET_U_1(bp);
bp++;
}
- ND_PRINT((ndo, "\n\t %s Option %u, length %u%s", cp, tag, len,
- len > 0 ? ": " : ""));
+ 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_8BITS(bp) == TAG_PAD) {
+ GET_U_1(bp) == TAG_PAD) {
bp++;
ntag++;
}
if (ntag > 1)
- ND_PRINT((ndo, ", occurs %u", ntag));
+ ND_PRINT(", occurs %u", ntag);
}
- if (!ND_TTEST2(*bp, len)) {
- ND_PRINT((ndo, "[|rfc1048 %u]", len));
- return;
- }
+ ND_TCHECK_LEN(bp, len);
if (tag == TAG_DHCP_MESSAGE && len == 1) {
- uc = EXTRACT_8BITS(bp);
+ ND_PRINT("%s",
+ tok2str(dhcp_msg_values, "Unknown (%u)", GET_U_1(bp)));
bp++;
- ND_PRINT((ndo, "%s", tok2str(dhcp_msg_values, "Unknown (%u)", uc)));
continue;
}
if (tag == TAG_PARM_REQUEST) {
idx = 0;
- while (len-- > 0) {
- uc = EXTRACT_8BITS(bp);
+ while (len != 0) {
+ uint8_t innertag = GET_U_1(bp);
bp++;
- cp = tok2str(tag2str, "?Option %u", uc);
+ len--;
+ cp = tok2str(tag2str, "?Unknown", innertag);
if (idx % 4 == 0)
- ND_PRINT((ndo, "\n\t "));
+ ND_PRINT("\n\t ");
else
- ND_PRINT((ndo, ", "));
- ND_PRINT((ndo, "%s", cp + 1));
+ ND_PRINT(", ");
+ ND_PRINT("%s (%u)", cp + 1, innertag);
idx++;
}
continue;
}
- if (tag == TAG_EXTENDED_REQUEST) {
- first = 1;
- while (len > 1) {
- len -= 2;
- us = EXTRACT_BE_16BITS(bp);
- bp += 2;
- cp = tok2str(xtag2str, "?xT%u", us);
- if (!first)
- ND_PRINT((ndo, "+"));
- ND_PRINT((ndo, "%s", cp + 1));
- first = 0;
- }
- continue;
- }
-
/* Print data */
if (c == '?') {
/* Base default formats for unknown tags on data size */
case 'a':
/* ASCII strings */
- ND_PRINT((ndo, "\""));
- if (fn_printn(ndo, bp, len, ndo->ndo_snapend)) {
- ND_PRINT((ndo, "\""));
- goto trunc;
- }
- ND_PRINT((ndo, "\""));
+ ND_PRINT("\"");
+ nd_printjn(ndo, bp, len);
+ ND_PRINT("\"");
bp += len;
len = 0;
break;
case 'l':
case 'L':
/* ip addresses/32-bit words */
- while (len >= sizeof(ul)) {
+ while (len >= 4) {
if (!first)
- ND_PRINT((ndo, ","));
- ul = EXTRACT_BE_32BITS(bp);
- if (c == 'i') {
- ul = htonl(ul);
- ND_PRINT((ndo, "%s", ipaddr_string(ndo, &ul)));
- } else if (c == 'L')
- ND_PRINT((ndo, "%d", ul));
+ ND_PRINT(",");
+ if (c == 'i')
+ ND_PRINT("%s", GET_IPADDR_STRING(bp));
+ else if (c == 'L')
+ ND_PRINT("%d", GET_BE_S_4(bp));
else
- ND_PRINT((ndo, "%u", ul));
- bp += sizeof(ul);
- len -= sizeof(ul);
+ ND_PRINT("%u", GET_BE_U_4(bp));
+ bp += 4;
+ len -= 4;
first = 0;
}
break;
case 'p':
/* IP address pairs */
- while (len >= 2*sizeof(ul)) {
+ /* this option should be N x 8 bytes long */
+ if (len < 8 || len % 8 != 0) {
+ ND_PRINT("%s[length != N x 8 bytes]",
+ len == 0 ? " " : "");
+ bp += len;
+ len = 0;
+ break;
+ }
+ while (len >= 2*4) {
if (!first)
- ND_PRINT((ndo, ","));
- memcpy((char *)&ul, (const char *)bp, sizeof(ul));
- ND_PRINT((ndo, "(%s:", ipaddr_string(ndo, &ul)));
- bp += sizeof(ul);
- memcpy((char *)&ul, (const char *)bp, sizeof(ul));
- ND_PRINT((ndo, "%s)", ipaddr_string(ndo, &ul)));
- bp += sizeof(ul);
- len -= 2*sizeof(ul);
+ ND_PRINT(",");
+ ND_PRINT("(%s:", GET_IPADDR_STRING(bp));
+ bp += 4;
+ len -= 4;
+ ND_PRINT("%s)", GET_IPADDR_STRING(bp));
+ bp += 4;
+ len -= 4;
first = 0;
}
break;
case 's':
- /* shorts */
- while (len >= sizeof(us)) {
+ /* unsigned shorts */
+ while (len >= 2) {
if (!first)
- ND_PRINT((ndo, ","));
- us = EXTRACT_BE_16BITS(bp);
- ND_PRINT((ndo, "%u", us));
- bp += sizeof(us);
- len -= sizeof(us);
+ ND_PRINT(",");
+ ND_PRINT("%u", GET_BE_U_2(bp));
+ bp += 2;
+ len -= 2;
first = 0;
}
break;
case 'B':
/* boolean */
- while (len > 0) {
- uint8_t bool_value;
- if (!first)
- ND_PRINT((ndo, ","));
- bool_value = EXTRACT_8BITS(bp);
- switch (bool_value) {
- case 0:
- ND_PRINT((ndo, "N"));
- break;
- case 1:
- ND_PRINT((ndo, "Y"));
- break;
- default:
- ND_PRINT((ndo, "%u?", bool_value));
- break;
- }
- ++bp;
- --len;
- first = 0;
+ {
+ /* this option should be 1 byte long */
+ if (len != 1) {
+ ND_PRINT("[length != 1 byte]");
+ nd_print_invalid(ndo);
+ bp += len;
+ len = 0;
+ break;
+ }
+
+ uint8_t bool_value;
+ bool_value = GET_U_1(bp);
+ switch (bool_value) {
+ case 0:
+ ND_PRINT("N");
+ break;
+ case 1:
+ ND_PRINT("Y");
+ break;
+ default:
+ ND_PRINT("%u?", bool_value);
+ break;
}
+ ++bp;
+ --len;
break;
+ }
case 'b':
case 'x':
default:
/* Bytes */
- while (len > 0) {
+ while (len != 0) {
uint8_t byte_value;
if (!first)
- ND_PRINT((ndo, c == 'x' ? ":" : "."));
- byte_value = EXTRACT_8BITS(bp);
+ ND_PRINT(c == 'x' ? ":" : ".");
+ byte_value = GET_U_1(bp);
if (c == 'x')
- ND_PRINT((ndo, "%02x", byte_value));
+ ND_PRINT("%02x", byte_value);
else
- ND_PRINT((ndo, "%u", byte_value));
+ ND_PRINT("%u", byte_value);
++bp;
--len;
first = 0;
case TAG_NETBIOS_NODE:
/* this option should be at least 1 byte long */
if (len < 1) {
- ND_PRINT((ndo, "ERROR: length < 1 bytes"));
+ ND_PRINT("[length < 1 byte]");
+ nd_print_invalid(ndo);
break;
}
- tag = EXTRACT_8BITS(bp);
+ tag = GET_U_1(bp);
++bp;
--len;
- ND_PRINT((ndo, "%s", tok2str(nbo2str, NULL, tag)));
+ ND_PRINT("%s", tok2str(nbo2str, NULL, tag));
break;
case TAG_OPT_OVERLOAD:
/* this option should be at least 1 byte long */
if (len < 1) {
- ND_PRINT((ndo, "ERROR: length < 1 bytes"));
+ ND_PRINT("[length < 1 byte]");
+ nd_print_invalid(ndo);
break;
}
- tag = EXTRACT_8BITS(bp);
+ tag = GET_U_1(bp);
++bp;
--len;
- ND_PRINT((ndo, "%s", tok2str(oo2str, NULL, tag)));
+ ND_PRINT("%s", tok2str(oo2str, NULL, tag));
break;
case TAG_CLIENT_FQDN:
/* this option should be at least 3 bytes long */
if (len < 3) {
- ND_PRINT((ndo, "ERROR: length < 3 bytes"));
+ ND_PRINT("[length < 3 bytes]");
+ nd_print_invalid(ndo);
bp += len;
len = 0;
break;
}
- if (EXTRACT_8BITS(bp))
- ND_PRINT((ndo, "[%s] ", client_fqdn_flags(EXTRACT_8BITS(bp))));
+ if (GET_U_1(bp) & 0xf0) {
+ ND_PRINT("[MBZ nibble 0x%x != 0] ",
+ (GET_U_1(bp) & 0xf0) >> 4);
+ nd_print_invalid(ndo);
+ }
+ if (GET_U_1(bp) & 0x0f)
+ ND_PRINT("[%s] ",
+ bittok2str_nosep(fqdn_flags_bm, "", (GET_U_1(bp))));
bp++;
- if (EXTRACT_8BITS(bp) || EXTRACT_8BITS(bp+1))
- ND_PRINT((ndo, "%u/%u ", EXTRACT_8BITS(bp), EXTRACT_8BITS(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((ndo, "\""));
- if (fn_printn(ndo, bp, len - 3, ndo->ndo_snapend)) {
- ND_PRINT((ndo, "\""));
- goto trunc;
- }
- ND_PRINT((ndo, "\""));
+ ND_PRINT("\"");
+ nd_printjn(ndo, bp, len - 3);
+ ND_PRINT("\"");
bp += len - 3;
len = 0;
break;
/* this option should be at least 1 byte long */
if (len < 1) {
- ND_PRINT((ndo, "ERROR: length < 1 bytes"));
+ ND_PRINT("[length < 1 byte]");
+ nd_print_invalid(ndo);
break;
}
- type = EXTRACT_8BITS(bp);
+ type = GET_U_1(bp);
bp++;
len--;
if (type == 0) {
- ND_PRINT((ndo, "\""));
- if (fn_printn(ndo, bp, len, ndo->ndo_snapend)) {
- ND_PRINT((ndo, "\""));
- goto trunc;
- }
- ND_PRINT((ndo, "\""));
+ ND_PRINT("\"");
+ nd_printjn(ndo, bp, len);
+ ND_PRINT("\"");
bp += len;
len = 0;
break;
} else {
- ND_PRINT((ndo, "%s ", tok2str(arp2str, "hardware-type %u,", type)));
- while (len > 0) {
+ ND_PRINT("%s ", tok2str(arp2str, "hardware-type %u,", type));
+ while (len != 0) {
if (!first)
- ND_PRINT((ndo, ":"));
- ND_PRINT((ndo, "%02x", EXTRACT_8BITS(bp)));
+ ND_PRINT(":");
+ ND_PRINT("%02x", GET_U_1(bp));
++bp;
--len;
first = 0;
case TAG_AGENT_CIRCUIT:
while (len >= 2) {
- subopt = EXTRACT_8BITS(bp);
- suboptlen = EXTRACT_8BITS(bp+1);
+ subopt = GET_U_1(bp);
+ suboptlen = GET_U_1(bp + 1);
bp += 2;
len -= 2;
if (suboptlen > len) {
- ND_PRINT((ndo, "\n\t %s SubOption %u, length %u: length goes past end of option",
+ ND_PRINT("\n\t %s SubOption %u, length %u: length goes past end of option",
tok2str(agent_suboption_values, "Unknown", subopt),
subopt,
- suboptlen));
+ suboptlen);
bp += len;
len = 0;
break;
}
- ND_PRINT((ndo, "\n\t %s SubOption %u, length %u: ",
+ ND_PRINT("\n\t %s SubOption %u, length %u: ",
tok2str(agent_suboption_values, "Unknown", subopt),
subopt,
- suboptlen));
+ suboptlen);
switch (subopt) {
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:
/* this option should be at least 5 bytes long */
if (len < 5) {
- ND_PRINT((ndo, "ERROR: length < 5 bytes"));
+ ND_PRINT("[length < 5 bytes]");
+ nd_print_invalid(ndo);
bp += len;
len = 0;
break;
}
- while (len > 0) {
+ while (len != 0) {
if (!first)
- ND_PRINT((ndo, ","));
- mask_width = EXTRACT_8BITS(bp);
+ ND_PRINT(",");
+ mask_width = GET_U_1(bp);
bp++;
len--;
/* mask_width <= 32 */
if (mask_width > 32) {
- ND_PRINT((ndo, "[ERROR: Mask width (%d) > 32]", mask_width));
+ ND_PRINT("[Mask width (%u) > 32]", mask_width);
+ nd_print_invalid(ndo);
bp += len;
len = 0;
break;
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("[Remaining length (%u) < %u bytes]", len, significant_octets + 4);
+ nd_print_invalid(ndo);
bp += len;
len = 0;
break;
}
- ND_PRINT((ndo, "("));
+ ND_PRINT("(");
if (mask_width == 0)
- ND_PRINT((ndo, "default"));
+ ND_PRINT("default");
else {
for (i = 0; i < significant_octets ; i++) {
if (i > 0)
- ND_PRINT((ndo, "."));
- ND_PRINT((ndo, "%d", EXTRACT_8BITS(bp)));
+ ND_PRINT(".");
+ ND_PRINT("%u",
+ GET_U_1(bp));
bp++;
}
for (i = significant_octets ; i < 4 ; i++)
- ND_PRINT((ndo, ".0"));
- ND_PRINT((ndo, "/%d", mask_width));
+ ND_PRINT(".0");
+ ND_PRINT("/%u", mask_width);
}
- memcpy((char *)&ul, (const char *)bp, sizeof(ul));
- ND_PRINT((ndo, ":%s)", ipaddr_string(ndo, &ul)));
- bp += sizeof(ul);
+ ND_PRINT(":%s)", GET_IPADDR_STRING(bp));
+ bp += 4;
len -= (significant_octets + 4);
first = 0;
}
first = 1;
if (len < 2) {
- ND_PRINT((ndo, "ERROR: length < 2 bytes"));
+ ND_PRINT("[length < 2 bytes]");
+ nd_print_invalid(ndo);
bp += len;
len = 0;
break;
}
- while (len > 0) {
- suboptlen = EXTRACT_8BITS(bp);
+ while (len != 0) {
+ suboptlen = GET_U_1(bp);
bp++;
len--;
- ND_PRINT((ndo, "\n\t "));
- ND_PRINT((ndo, "instance#%u: ", suboptnumber));
+ ND_PRINT("\n\t ");
+ ND_PRINT("instance#%u: ", suboptnumber);
if (suboptlen == 0) {
- ND_PRINT((ndo, "ERROR: suboption length must be non-zero"));
+ ND_PRINT("[suboption length == 0]");
+ nd_print_invalid(ndo);
bp += len;
len = 0;
break;
}
if (len < suboptlen) {
- ND_PRINT((ndo, "ERROR: invalid option"));
+ ND_PRINT("[length %u < suboption length %u",
+ len, suboptlen);
+ nd_print_invalid(ndo);
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));
+ ND_PRINT("\"");
+ nd_printjn(ndo, bp, suboptlen);
+ ND_PRINT("\"");
+ ND_PRINT(", length %u", suboptlen);
suboptnumber++;
len -= suboptlen;
bp += suboptlen;
break;
}
+
+ case TAG_SZTP_REDIRECT:
+ /* as per https://datatracker.ietf.org/doc/html/rfc8572#section-8.3
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+-+-+-+-+-+-+
+ | uri-length | URI |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+-+-+-+-+-+-+
+
+ * uri-length: 2 octets long; specifies the length of the URI data.
+ * URI: URI of the SZTP bootstrap server.
+ */
+ while (len >= 2) {
+ uint16_t suboptlen2;
+
+ suboptlen2 = GET_BE_U_2(bp);
+ bp += 2;
+ len -= 2;
+ ND_PRINT("\n\t ");
+ ND_PRINT("length %u: ", suboptlen2);
+ if (len < suboptlen2) {
+ ND_PRINT("length goes past end of option");
+ bp += len;
+ len = 0;
+ break;
+ }
+ ND_PRINT("\"");
+ nd_printjn(ndo, bp, suboptlen2);
+ ND_PRINT("\"");
+ len -= suboptlen2;
+ bp += suboptlen2;
+ }
+ if (len != 0) {
+ ND_PRINT("[length < 2 bytes]");
+ nd_print_invalid(ndo);
+ }
+ break;
+
+ case TAG_IPV6_ONLY_PREFERRED:
+ /* this option should be 4 bytes long */
+ if (len != 4) {
+ ND_PRINT("[length != 4 bytes]");
+ nd_print_invalid(ndo);
+ bp += len;
+ len = 0;
+ }
+ ND_PRINT("%u", GET_BE_U_4(bp));
+ bp += 4;
+ len -= 4;
+ break;
+
default:
- ND_PRINT((ndo, "[unknown special tag %u, size %u]",
- tag, len));
+ ND_PRINT("[unknown special tag %u, size %u]",
+ tag, len);
bp += len;
len = 0;
break;
}
/* Data left over? */
if (len) {
- ND_PRINT((ndo, "\n\t trailing data length %u", len));
+ ND_PRINT("\n\t trailing data length %u", len);
bp += len;
}
}
- return;
-trunc:
- ND_PRINT((ndo, "|[rfc1048]"));
}
+#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,
- register const u_char *bp)
+ const u_char *bp)
{
- register const struct cmu_vend *cmu;
+ const struct cmu_vend *cmu;
+ uint8_t v_flags;
-#define PRINTCMUADDR(m, s) { ND_TCHECK(cmu->m); \
- if (cmu->m.s_addr != 0) \
- ND_PRINT((ndo, " %s:%s", s, ipaddr_string(ndo, &cmu->m.s_addr))); }
-
- ND_PRINT((ndo, " vend-cmu"));
+ ND_PRINT(" vend-cmu");
cmu = (const struct cmu_vend *)bp;
/* Only print if there are unknown bits */
- ND_TCHECK(cmu->v_flags);
- if ((cmu->v_flags & ~(VF_SMASK)) != 0)
- ND_PRINT((ndo, " F:0x%x", cmu->v_flags));
+ ND_TCHECK_4(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");
- PRINTCMUADDR(v_smask, cmu->v_flags & VF_SMASK ? "SM" : "SM*");
+ PRINTCMUADDR(v_smask, v_flags & VF_SMASK ? "SM" : "SM*");
PRINTCMUADDR(v_dns1, "NS1");
PRINTCMUADDR(v_dns2, "NS2");
PRINTCMUADDR(v_ins1, "IEN1");
PRINTCMUADDR(v_ins2, "IEN2");
PRINTCMUADDR(v_ts1, "TS1");
PRINTCMUADDR(v_ts2, "TS2");
- return;
-
-trunc:
- ND_PRINT((ndo, "%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;
-}
+#undef PRINTCMUADDR
projects / tcpdump / blobdiff