*/
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-ospf6.c,v 1.10 2002-12-11 07:14:06 guy Exp $ (LBL)";
-#endif
+/* \summary: IPv6 Open Shortest Path First (OSPFv3) printer */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#include <tcpdump-stdinc.h>
+#include <netdissect-stdinc.h>
-#include <stdio.h>
#include <string.h>
-#include "interface.h"
+#include "netdissect.h"
#include "addrtoname.h"
+#include "extract.h"
+
+#include "ospf.h"
+
+#define OSPF_TYPE_HELLO 1 /* Hello */
+#define OSPF_TYPE_DD 2 /* Database Description */
+#define OSPF_TYPE_LS_REQ 3 /* Link State Request */
+#define OSPF_TYPE_LS_UPDATE 4 /* Link State Update */
+#define OSPF_TYPE_LS_ACK 5 /* Link State Ack */
+
+/* Options *_options */
+#define OSPF6_OPTION_V6 0x01 /* V6 bit: A bit for peeping tom */
+#define OSPF6_OPTION_E 0x02 /* E bit: External routes advertised */
+#define OSPF6_OPTION_MC 0x04 /* MC bit: Multicast capable */
+#define OSPF6_OPTION_N 0x08 /* N bit: For type-7 LSA */
+#define OSPF6_OPTION_R 0x10 /* R bit: Router bit */
+#define OSPF6_OPTION_DC 0x20 /* DC bit: Demand circuits */
+/* The field is actually 24-bit (RFC5340 Section A.2). */
+#define OSPF6_OPTION_AF 0x0100 /* AF bit: Multiple address families */
+#define OSPF6_OPTION_L 0x0200 /* L bit: Link-local signaling (LLS) */
+#define OSPF6_OPTION_AT 0x0400 /* AT bit: Authentication trailer */
+
+
+/* db_flags */
+#define OSPF6_DB_INIT 0x04 /* */
+#define OSPF6_DB_MORE 0x02
+#define OSPF6_DB_MASTER 0x01
+#define OSPF6_DB_M6 0x10 /* IPv6 MTU */
+
+/* ls_type */
+#define LS_TYPE_ROUTER 1 /* router link */
+#define LS_TYPE_NETWORK 2 /* network link */
+#define LS_TYPE_INTER_AP 3 /* Inter-Area-Prefix */
+#define LS_TYPE_INTER_AR 4 /* Inter-Area-Router */
+#define LS_TYPE_ASE 5 /* ASE */
+#define LS_TYPE_GROUP 6 /* Group membership */
+#define LS_TYPE_NSSA 7 /* NSSA */
+#define LS_TYPE_LINK 8 /* Link LSA */
+#define LS_TYPE_INTRA_AP 9 /* Intra-Area-Prefix */
+#define LS_TYPE_INTRA_ATE 10 /* Intra-Area-TE */
+#define LS_TYPE_GRACE 11 /* Grace LSA */
+#define LS_TYPE_RI 12 /* Router information */
+#define LS_TYPE_INTER_ASTE 13 /* Inter-AS-TE */
+#define LS_TYPE_L1VPN 14 /* L1VPN */
+#define LS_TYPE_MASK 0x1fff
+
+#define LS_SCOPE_LINKLOCAL 0x0000
+#define LS_SCOPE_AREA 0x2000
+#define LS_SCOPE_AS 0x4000
+#define LS_SCOPE_MASK 0x6000
+#define LS_SCOPE_U 0x8000
+
+/* rla_link.link_type */
+#define RLA_TYPE_ROUTER 1 /* point-to-point to another router */
+#define RLA_TYPE_TRANSIT 2 /* connection to transit network */
+#define RLA_TYPE_VIRTUAL 4 /* virtual link */
+
+/* rla_flags */
+#define RLA_FLAG_B 0x01
+#define RLA_FLAG_E 0x02
+#define RLA_FLAG_V 0x04
+#define RLA_FLAG_W 0x08
+#define RLA_FLAG_N 0x10
+
+/* lsa_prefix options */
+#define LSA_PREFIX_OPT_NU 0x01
+#define LSA_PREFIX_OPT_LA 0x02
+#define LSA_PREFIX_OPT_MC 0x04
+#define LSA_PREFIX_OPT_P 0x08
+#define LSA_PREFIX_OPT_DN 0x10
+
+/* sla_tosmetric breakdown */
+#define SLA_MASK_TOS 0x7f000000
+#define SLA_MASK_METRIC 0x00ffffff
+#define SLA_SHIFT_TOS 24
+
+/* asla_metric */
+#define ASLA_FLAG_FWDADDR 0x02000000
+#define ASLA_FLAG_ROUTETAG 0x01000000
+#define ASLA_MASK_METRIC 0x00ffffff
+
+/* RFC6506 Section 4.1 */
+#define OSPF6_AT_HDRLEN 16U
+#define OSPF6_AUTH_TYPE_HMAC 0x0001
+
+typedef uint32_t rtrid_t;
+
+/* link state advertisement header */
+struct lsa6_hdr {
+ uint16_t ls_age;
+ uint16_t ls_type;
+ rtrid_t ls_stateid;
+ rtrid_t ls_router;
+ uint32_t ls_seq;
+ uint16_t ls_chksum;
+ uint16_t ls_length;
+};
-#include "ospf6.h"
+/* Length of an IPv6 address, in bytes. */
+#define IPV6_ADDR_LEN_BYTES (128/8)
-struct bits {
- u_int32_t bit;
- const char *str;
+struct lsa6_prefix {
+ uint8_t lsa_p_len;
+ uint8_t lsa_p_opt;
+ uint16_t lsa_p_metric;
+ uint8_t lsa_p_prefix[IPV6_ADDR_LEN_BYTES]; /* maximum length */
};
-static const struct bits ospf6_option_bits[] = {
- { OSPF6_OPTION_V6, "V6" },
- { OSPF6_OPTION_E, "E" },
- { OSPF6_OPTION_MC, "MC" },
- { OSPF6_OPTION_N, "N" },
- { OSPF6_OPTION_R, "R" },
- { OSPF6_OPTION_DC, "DC" },
- { 0, NULL }
-};
+/* link state advertisement */
+struct lsa6 {
+ struct lsa6_hdr ls_hdr;
+
+ /* Link state types */
+ union {
+ /* Router links advertisements */
+ struct {
+ union {
+ uint8_t flg;
+ uint32_t opt;
+ } rla_flgandopt;
+#define rla_flags rla_flgandopt.flg
+#define rla_options rla_flgandopt.opt
+ struct rlalink6 {
+ uint8_t link_type;
+ uint8_t link_zero[1];
+ uint16_t link_metric;
+ uint32_t link_ifid;
+ uint32_t link_nifid;
+ rtrid_t link_nrtid;
+ } rla_link[1]; /* may repeat */
+ } un_rla;
+
+ /* Network links advertisements */
+ struct {
+ uint32_t nla_options;
+ rtrid_t nla_router[1]; /* may repeat */
+ } un_nla;
+
+ /* Inter Area Prefix LSA */
+ struct {
+ uint32_t inter_ap_metric;
+ struct lsa6_prefix inter_ap_prefix[1];
+ } un_inter_ap;
+
+ /* AS external links advertisements */
+ struct {
+ uint32_t asla_metric;
+ struct lsa6_prefix asla_prefix[1];
+ /* some optional fields follow */
+ } un_asla;
-static const struct bits ospf6_rla_flag_bits[] = {
- { RLA_FLAG_B, "B" },
- { RLA_FLAG_E, "E" },
- { RLA_FLAG_V, "V" },
- { RLA_FLAG_W, "W" },
- { 0, NULL }
-};
+#if 0
+ /* Summary links advertisements */
+ struct {
+ struct in_addr sla_mask;
+ uint32_t sla_tosmetric[1]; /* may repeat */
+ } un_sla;
+
+ /* Multicast group membership */
+ struct mcla {
+ uint32_t mcla_vtype;
+ struct in_addr mcla_vid;
+ } un_mcla[1];
+#endif
-static const struct bits ospf6_asla_flag_bits[] = {
- { ASLA_FLAG_EXTERNAL, "E" },
- { ASLA_FLAG_FWDADDR, "F" },
- { ASLA_FLAG_ROUTETAG, "T" },
- { 0, NULL }
+ /* Type 7 LSA */
+
+ /* Link LSA */
+ struct llsa {
+ union {
+ uint8_t pri;
+ uint32_t opt;
+ } llsa_priandopt;
+#define llsa_priority llsa_priandopt.pri
+#define llsa_options llsa_priandopt.opt
+ struct in6_addr llsa_lladdr;
+ uint32_t llsa_nprefix;
+ struct lsa6_prefix llsa_prefix[1];
+ } un_llsa;
+
+ /* Intra-Area-Prefix */
+ struct {
+ uint16_t intra_ap_nprefix;
+ uint16_t intra_ap_lstype;
+ rtrid_t intra_ap_lsid;
+ rtrid_t intra_ap_rtid;
+ struct lsa6_prefix intra_ap_prefix[1];
+ } un_intra_ap;
+ } lsa_un;
};
-static struct tok type2str[] = {
- { OSPF_TYPE_UMD, "umd" },
- { OSPF_TYPE_HELLO, "hello" },
- { OSPF_TYPE_DB, "dd" },
- { OSPF_TYPE_LSR, "ls_req" },
- { OSPF_TYPE_LSU, "ls_upd" },
- { OSPF_TYPE_LSA, "ls_ack" },
- { 0, NULL }
+/*
+ * the main header
+ */
+struct ospf6hdr {
+ uint8_t ospf6_version;
+ uint8_t ospf6_type;
+ uint16_t ospf6_len;
+ rtrid_t ospf6_routerid;
+ rtrid_t ospf6_areaid;
+ uint16_t ospf6_chksum;
+ uint8_t ospf6_instanceid;
+ uint8_t ospf6_rsvd;
};
-static char tstr[] = " [|ospf]";
-
-#ifdef WIN32
-#define inline __inline
-#endif /* WIN32 */
-
-/* Forwards */
-static inline void ospf6_print_seqage(u_int32_t, time_t);
-static inline void ospf6_print_bits(const struct bits *, u_char);
-static void ospf6_print_ls_type(u_int, const rtrid_t *,
- const rtrid_t *, const char *);
-static int ospf6_print_lshdr(const struct lsa_hdr *);
-static int ospf6_print_lsa(const struct lsa *);
-static int ospf6_decode_v3(const struct ospf6hdr *, const u_char *);
-
-static inline void
-ospf6_print_seqage(register u_int32_t seq, register time_t us)
-{
- register time_t sec = us % 60;
- register time_t mins = (us / 60) % 60;
- register time_t hour = us / 3600;
-
- printf(" S %X age ", seq);
- if (hour)
- printf("%u:%02u:%02u",
- (u_int32_t) hour, (u_int32_t) mins, (u_int32_t) sec);
- else if (mins)
- printf("%u:%02u", (u_int32_t) mins, (u_int32_t) sec);
- else
- printf("%u", (u_int32_t) sec);
-}
-
+/*
+ * The OSPF6 header length is 16 bytes, regardless of how your compiler
+ * might choose to pad the above structure.
+ */
+#define OSPF6HDR_LEN 16
+
+/* Hello packet */
+struct hello6 {
+ uint32_t hello_ifid;
+ union {
+ uint8_t pri;
+ uint32_t opt;
+ } hello_priandopt;
+#define hello_priority hello_priandopt.pri
+#define hello_options hello_priandopt.opt
+ uint16_t hello_helloint;
+ uint16_t hello_deadint;
+ rtrid_t hello_dr;
+ rtrid_t hello_bdr;
+ rtrid_t hello_neighbor[1]; /* may repeat */
+};
-static inline void
-ospf6_print_bits(register const struct bits *bp, register u_char options)
-{
- register char sep = ' ';
+/* Database Description packet */
+struct dd6 {
+ uint32_t db_options;
+ uint16_t db_mtu;
+ uint8_t db_mbz;
+ uint8_t db_flags;
+ uint32_t db_seq;
+ struct lsa6_hdr db_lshdr[1]; /* may repeat */
+};
- do {
- if (options & bp->bit) {
- printf("%c%s", sep, bp->str);
- sep = '/';
- }
- } while ((++bp)->bit);
-}
+/* Link State Request */
+struct lsr6 {
+ uint16_t ls_mbz;
+ uint16_t ls_type;
+ rtrid_t ls_stateid;
+ rtrid_t ls_router;
+};
-static void
-ospf6_print_ls_type(register u_int ls_type,
- register const rtrid_t *ls_stateid,
- register const rtrid_t *ls_router, register const char *fmt)
-{
- char *scope;
+/* Link State Update */
+struct lsu6 {
+ uint32_t lsu_count;
+ struct lsa6 lsu_lsa[1]; /* may repeat */
+};
- switch (ls_type & LS_SCOPE_MASK) {
- case LS_SCOPE_LINKLOCAL:
- scope = "linklocal-";
- break;
- case LS_SCOPE_AREA:
- scope = "area-";
- break;
- case LS_SCOPE_AS:
- scope = "AS-";
- break;
- default:
- scope = "";
- break;
- }
+static const char tstr[] = " [|ospf3]";
- switch (ls_type & LS_TYPE_MASK) {
- case LS_TYPE_ROUTER:
- printf(" %srtr %s", scope, ipaddr_string(ls_router));
- break;
-
- case LS_TYPE_NETWORK:
- printf(" %snet dr %s if %s", scope,
- ipaddr_string(ls_router),
- ipaddr_string(ls_stateid));
- break;
+static const struct tok ospf6_option_values[] = {
+ { OSPF6_OPTION_V6, "V6" },
+ { OSPF6_OPTION_E, "External" },
+ { OSPF6_OPTION_MC, "Deprecated" },
+ { OSPF6_OPTION_N, "NSSA" },
+ { OSPF6_OPTION_R, "Router" },
+ { OSPF6_OPTION_DC, "Demand Circuit" },
+ { OSPF6_OPTION_AF, "AFs Support" },
+ { OSPF6_OPTION_L, "LLS" },
+ { OSPF6_OPTION_AT, "Authentication Trailer" },
+ { 0, NULL }
+};
- case LS_TYPE_INTER_AP:
- printf(" %sinter-area-prefix %s abr %s", scope,
- ipaddr_string(ls_stateid),
- ipaddr_string(ls_router));
- break;
+static const struct tok ospf6_rla_flag_values[] = {
+ { RLA_FLAG_B, "ABR" },
+ { RLA_FLAG_E, "External" },
+ { RLA_FLAG_V, "Virtual-Link Endpoint" },
+ { RLA_FLAG_W, "Wildcard Receiver" },
+ { RLA_FLAG_N, "NSSA Translator" },
+ { 0, NULL }
+};
- case LS_TYPE_INTER_AR:
- printf(" %sinter-area-router %s rtr %s", scope,
- ipaddr_string(ls_router),
- ipaddr_string(ls_stateid));
- break;
+static const struct tok ospf6_asla_flag_values[] = {
+ { ASLA_FLAG_EXTERNAL, "External Type 2" },
+ { ASLA_FLAG_FWDADDR, "Forwarding" },
+ { ASLA_FLAG_ROUTETAG, "Tag" },
+ { 0, NULL }
+};
- case LS_TYPE_ASE:
- printf(" %sase %s asbr %s", scope,
- ipaddr_string(ls_stateid),
- ipaddr_string(ls_router));
- break;
+static const struct tok ospf6_type_values[] = {
+ { OSPF_TYPE_HELLO, "Hello" },
+ { OSPF_TYPE_DD, "Database Description" },
+ { OSPF_TYPE_LS_REQ, "LS-Request" },
+ { OSPF_TYPE_LS_UPDATE, "LS-Update" },
+ { OSPF_TYPE_LS_ACK, "LS-Ack" },
+ { 0, NULL }
+};
- case LS_TYPE_GROUP:
- printf(" %sgroup %s rtr %s", scope,
- ipaddr_string(ls_stateid),
- ipaddr_string(ls_router));
- break;
+static const struct tok ospf6_lsa_values[] = {
+ { LS_TYPE_ROUTER, "Router" },
+ { LS_TYPE_NETWORK, "Network" },
+ { LS_TYPE_INTER_AP, "Inter-Area Prefix" },
+ { LS_TYPE_INTER_AR, "Inter-Area Router" },
+ { LS_TYPE_ASE, "External" },
+ { LS_TYPE_GROUP, "Deprecated" },
+ { LS_TYPE_NSSA, "NSSA" },
+ { LS_TYPE_LINK, "Link" },
+ { LS_TYPE_INTRA_AP, "Intra-Area Prefix" },
+ { LS_TYPE_INTRA_ATE, "Intra-Area TE" },
+ { LS_TYPE_GRACE, "Grace" },
+ { LS_TYPE_RI, "Router Information" },
+ { LS_TYPE_INTER_ASTE, "Inter-AS-TE" },
+ { LS_TYPE_L1VPN, "Layer 1 VPN" },
+ { 0, NULL }
+};
- case LS_TYPE_TYPE7:
- printf(" %stype7 %s rtr %s", scope,
- ipaddr_string(ls_stateid),
- ipaddr_string(ls_router));
- break;
+static const struct tok ospf6_ls_scope_values[] = {
+ { LS_SCOPE_LINKLOCAL, "Link Local" },
+ { LS_SCOPE_AREA, "Area Local" },
+ { LS_SCOPE_AS, "Domain Wide" },
+ { 0, NULL }
+};
- case LS_TYPE_LINK:
- printf(" %slink %s rtr %s", scope,
- ipaddr_string(ls_stateid),
- ipaddr_string(ls_router));
- break;
+static const struct tok ospf6_dd_flag_values[] = {
+ { OSPF6_DB_INIT, "Init" },
+ { OSPF6_DB_MORE, "More" },
+ { OSPF6_DB_MASTER, "Master" },
+ { OSPF6_DB_M6, "IPv6 MTU" },
+ { 0, NULL }
+};
- case LS_TYPE_INTRA_AP:
- printf(" %sintra-area-prefix %s rtr %s", scope,
- ipaddr_string(ls_stateid),
- ipaddr_string(ls_router));
- break;
+static const struct tok ospf6_lsa_prefix_option_values[] = {
+ { LSA_PREFIX_OPT_NU, "No Unicast" },
+ { LSA_PREFIX_OPT_LA, "Local address" },
+ { LSA_PREFIX_OPT_MC, "Deprecated" },
+ { LSA_PREFIX_OPT_P, "Propagate" },
+ { LSA_PREFIX_OPT_DN, "Down" },
+ { 0, NULL }
+};
- default:
- printf(" %s", scope);
- printf(fmt, ls_type);
- break;
- }
+static const struct tok ospf6_auth_type_str[] = {
+ { OSPF6_AUTH_TYPE_HMAC, "HMAC" },
+ { 0, NULL }
+};
+static void
+ospf6_print_ls_type(netdissect_options *ndo,
+ register u_int ls_type, register const rtrid_t *ls_stateid)
+{
+ ND_PRINT((ndo, "\n\t %s LSA (%d), %s Scope%s, LSA-ID %s",
+ tok2str(ospf6_lsa_values, "Unknown", ls_type & LS_TYPE_MASK),
+ ls_type & LS_TYPE_MASK,
+ tok2str(ospf6_ls_scope_values, "Unknown", ls_type & LS_SCOPE_MASK),
+ ls_type &0x8000 ? ", transitive" : "", /* U-bit */
+ ipaddr_string(ndo, ls_stateid)));
}
static int
-ospf6_print_lshdr(register const struct lsa_hdr *lshp)
+ospf6_print_lshdr(netdissect_options *ndo,
+ register const struct lsa6_hdr *lshp, const u_char *dataend)
{
+ if ((const u_char *)(lshp + 1) > dataend)
+ goto trunc;
+ ND_TCHECK(lshp->ls_type);
+ ND_TCHECK(lshp->ls_seq);
- TCHECK(lshp->ls_type);
- printf(" {"); /* } (ctags) */
+ ND_PRINT((ndo, "\n\t Advertising Router %s, seq 0x%08x, age %us, length %u",
+ ipaddr_string(ndo, &lshp->ls_router),
+ EXTRACT_BE_U_4(&lshp->ls_seq),
+ EXTRACT_BE_U_2(&lshp->ls_age),
+ EXTRACT_BE_U_2(&lshp->ls_length)-(u_int)sizeof(struct lsa6_hdr)));
- TCHECK(lshp->ls_seq);
- ospf6_print_seqage(EXTRACT_32BITS(&lshp->ls_seq), EXTRACT_16BITS(&lshp->ls_age));
- ospf6_print_ls_type(EXTRACT_16BITS(&lshp->ls_type), &lshp->ls_stateid,
- &lshp->ls_router, "ls_type %d");
+ ospf6_print_ls_type(ndo, EXTRACT_BE_U_2(&lshp->ls_type),
+ &lshp->ls_stateid);
return (0);
trunc:
}
static int
-ospf6_print_lsaprefix(register const struct lsa_prefix *lsapp)
+ospf6_print_lsaprefix(netdissect_options *ndo,
+ const uint8_t *tptr, u_int lsa_length)
{
- int k;
+ const struct lsa6_prefix *lsapp = (const struct lsa6_prefix *)tptr;
+ u_int wordlen;
struct in6_addr prefix;
- TCHECK(*lsapp);
- k = (lsapp->lsa_p_len + 31) / 32;
- if (k * 4 > sizeof(struct in6_addr)) {
- printf("??prefixlen %d??", lsapp->lsa_p_len);
+ if (lsa_length < sizeof (*lsapp) - IPV6_ADDR_LEN_BYTES)
+ goto trunc;
+ lsa_length -= sizeof (*lsapp) - IPV6_ADDR_LEN_BYTES;
+ ND_TCHECK2(*lsapp, sizeof (*lsapp) - IPV6_ADDR_LEN_BYTES);
+ wordlen = (lsapp->lsa_p_len + 31) / 32;
+ if (wordlen * 4 > sizeof(struct in6_addr)) {
+ ND_PRINT((ndo, " bogus prefixlen /%d", lsapp->lsa_p_len));
goto trunc;
}
+ if (lsa_length < wordlen * 4)
+ goto trunc;
+ lsa_length -= wordlen * 4;
+ ND_TCHECK2(lsapp->lsa_p_prefix, wordlen * 4);
memset(&prefix, 0, sizeof(prefix));
- memcpy(&prefix, lsapp->lsa_p_prefix, k * 4);
- printf(" %s/%d", ip6addr_string(&prefix),
- lsapp->lsa_p_len);
- if (lsapp->lsa_p_opt)
- printf("(opt=%x)", lsapp->lsa_p_opt);
- if (lsapp->lsa_p_mbz)
- printf("(mbz=%x)", EXTRACT_16BITS(&lsapp->lsa_p_mbz)); /* XXX */
- return sizeof(*lsapp) - 4 + k * 4;
+ memcpy(&prefix, lsapp->lsa_p_prefix, wordlen * 4);
+ ND_PRINT((ndo, "\n\t\t%s/%d", ip6addr_string(ndo, &prefix),
+ lsapp->lsa_p_len));
+ if (lsapp->lsa_p_opt) {
+ ND_PRINT((ndo, ", Options [%s]",
+ bittok2str(ospf6_lsa_prefix_option_values,
+ "none", lsapp->lsa_p_opt)));
+ }
+ ND_PRINT((ndo, ", metric %u", EXTRACT_BE_U_2(&lsapp->lsa_p_metric)));
+ return sizeof(*lsapp) - IPV6_ADDR_LEN_BYTES + wordlen * 4;
trunc:
return -1;
* Print a single link state advertisement. If truncated return 1, else 0.
*/
static int
-ospf6_print_lsa(register const struct lsa *lsap)
+ospf6_print_lsa(netdissect_options *ndo,
+ register const struct lsa6 *lsap, const u_char *dataend)
{
- register const u_char *ls_end, *ls_opt;
- register const struct rlalink *rlp;
+ register const struct rlalink6 *rlp;
#if 0
register const struct tos_metric *tosp;
#endif
register const struct mcla *mcp;
#endif
register const struct llsa *llsap;
- register const struct lsa_prefix *lsapp;
+ register const struct lsa6_prefix *lsapp;
#if 0
- register const u_int32_t *lp;
+ register const uint32_t *lp;
#endif
- register int j, k;
- u_int32_t flags32;
+ register u_int prefixes;
+ register int bytelen;
+ register u_int length, lsa_length;
+ uint32_t flags32;
+ const uint8_t *tptr;
- if (ospf6_print_lshdr(&lsap->ls_hdr))
+ if (ospf6_print_lshdr(ndo, &lsap->ls_hdr, dataend))
return (1);
- TCHECK(lsap->ls_hdr.ls_length);
- ls_end = (u_char *)lsap + EXTRACT_16BITS(&lsap->ls_hdr.ls_length);
- switch (EXTRACT_16BITS(&lsap->ls_hdr.ls_type)) {
+ ND_TCHECK(lsap->ls_hdr.ls_length);
+ length = EXTRACT_BE_U_2(&lsap->ls_hdr.ls_length);
+
+ /*
+ * The LSA length includes the length of the header;
+ * it must have a value that's at least that length.
+ * If it does, find the length of what follows the
+ * header.
+ */
+ if (length < sizeof(struct lsa6_hdr) || (const u_char *)lsap + length > dataend)
+ return (1);
+ lsa_length = length - sizeof(struct lsa6_hdr);
+ tptr = (const uint8_t *)lsap+sizeof(struct lsa6_hdr);
+
+ switch (EXTRACT_BE_U_2(&lsap->ls_hdr.ls_type)) {
case LS_TYPE_ROUTER | LS_SCOPE_AREA:
- TCHECK(lsap->lsa_un.un_rla.rla_flags);
- ospf6_print_bits(ospf6_rla_flag_bits,
- lsap->lsa_un.un_rla.rla_flags);
- TCHECK(lsap->lsa_un.un_rla.rla_options);
- ospf6_print_bits(ospf6_option_bits,
- EXTRACT_32BITS(&lsap->lsa_un.un_rla.rla_options));
-
- TCHECK(lsap->lsa_un.un_rla.rla_link);
+ if (lsa_length < sizeof (lsap->lsa_un.un_rla.rla_options))
+ return (1);
+ lsa_length -= sizeof (lsap->lsa_un.un_rla.rla_options);
+ ND_TCHECK(lsap->lsa_un.un_rla.rla_options);
+ ND_PRINT((ndo, "\n\t Options [%s]",
+ bittok2str(ospf6_option_values, "none",
+ EXTRACT_BE_U_4(&lsap->lsa_un.un_rla.rla_options))));
+ ND_PRINT((ndo, ", RLA-Flags [%s]",
+ bittok2str(ospf6_rla_flag_values, "none",
+ lsap->lsa_un.un_rla.rla_flags)));
+
rlp = lsap->lsa_un.un_rla.rla_link;
- while (rlp + sizeof(*rlp) <= (struct rlalink *)ls_end) {
- TCHECK(*rlp);
- printf(" {"); /* } (ctags) */
+ while (lsa_length != 0) {
+ if (lsa_length < sizeof (*rlp))
+ return (1);
+ lsa_length -= sizeof (*rlp);
+ ND_TCHECK(*rlp);
switch (rlp->link_type) {
case RLA_TYPE_VIRTUAL:
- printf(" virt");
- /* Fall through */
+ ND_PRINT((ndo, "\n\t Virtual Link: Neighbor Router-ID %s"
+ "\n\t Neighbor Interface-ID %s, Interface %s",
+ ipaddr_string(ndo, &rlp->link_nrtid),
+ ipaddr_string(ndo, &rlp->link_nifid),
+ ipaddr_string(ndo, &rlp->link_ifid)));
+ break;
case RLA_TYPE_ROUTER:
- printf(" nbrid %s nbrif %s if %s",
- ipaddr_string(&rlp->link_nrtid),
- ipaddr_string(&rlp->link_nifid),
- ipaddr_string(&rlp->link_ifid));
+ ND_PRINT((ndo, "\n\t Neighbor Router-ID %s"
+ "\n\t Neighbor Interface-ID %s, Interface %s",
+ ipaddr_string(ndo, &rlp->link_nrtid),
+ ipaddr_string(ndo, &rlp->link_nifid),
+ ipaddr_string(ndo, &rlp->link_ifid)));
break;
case RLA_TYPE_TRANSIT:
- printf(" dr %s drif %s if %s",
- ipaddr_string(&rlp->link_nrtid),
- ipaddr_string(&rlp->link_nifid),
- ipaddr_string(&rlp->link_ifid));
+ ND_PRINT((ndo, "\n\t Neighbor Network-ID %s"
+ "\n\t Neighbor Interface-ID %s, Interface %s",
+ ipaddr_string(ndo, &rlp->link_nrtid),
+ ipaddr_string(ndo, &rlp->link_nifid),
+ ipaddr_string(ndo, &rlp->link_ifid)));
break;
default:
- /* { (ctags) */
- printf(" ??RouterLinksType 0x%02x?? }",
- rlp->link_type);
+ ND_PRINT((ndo, "\n\t Unknown Router Links Type 0x%02x",
+ rlp->link_type));
return (0);
}
- printf(" metric %d", EXTRACT_16BITS(&rlp->link_metric));
- /* { (ctags) */
- printf(" }");
+ ND_PRINT((ndo, ", metric %d", EXTRACT_BE_U_2(&rlp->link_metric)));
rlp++;
}
break;
case LS_TYPE_NETWORK | LS_SCOPE_AREA:
- TCHECK(lsap->lsa_un.un_nla.nla_options);
- ospf6_print_bits(ospf6_option_bits,
- EXTRACT_32BITS(&lsap->lsa_un.un_nla.nla_options));
- printf(" rtrs");
+ if (lsa_length < sizeof (lsap->lsa_un.un_nla.nla_options))
+ return (1);
+ lsa_length -= sizeof (lsap->lsa_un.un_nla.nla_options);
+ ND_TCHECK(lsap->lsa_un.un_nla.nla_options);
+ ND_PRINT((ndo, "\n\t Options [%s]",
+ bittok2str(ospf6_option_values, "none",
+ EXTRACT_BE_U_4(&lsap->lsa_un.un_nla.nla_options))));
+
+ ND_PRINT((ndo, "\n\t Connected Routers:"));
ap = lsap->lsa_un.un_nla.nla_router;
- while ((u_char *)ap < ls_end) {
- TCHECK(*ap);
- printf(" %s", ipaddr_string(ap));
+ while (lsa_length != 0) {
+ if (lsa_length < sizeof (*ap))
+ return (1);
+ lsa_length -= sizeof (*ap);
+ ND_TCHECK(*ap);
+ ND_PRINT((ndo, "\n\t\t%s", ipaddr_string(ndo, ap)));
++ap;
}
break;
case LS_TYPE_INTER_AP | LS_SCOPE_AREA:
- TCHECK(lsap->lsa_un.un_inter_ap.inter_ap_metric);
- printf(" metric %u",
- EXTRACT_32BITS(&lsap->lsa_un.un_inter_ap.inter_ap_metric) & SLA_MASK_METRIC);
- lsapp = lsap->lsa_un.un_inter_ap.inter_ap_prefix;
- while (lsapp + sizeof(lsapp) <= (struct lsa_prefix *)ls_end) {
- k = ospf6_print_lsaprefix(lsapp);
- if (k)
+ if (lsa_length < sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric))
+ return (1);
+ lsa_length -= sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric);
+ ND_TCHECK(lsap->lsa_un.un_inter_ap.inter_ap_metric);
+ ND_PRINT((ndo, ", metric %u",
+ EXTRACT_BE_U_4(&lsap->lsa_un.un_inter_ap.inter_ap_metric) & SLA_MASK_METRIC));
+
+ tptr = (const uint8_t *)lsap->lsa_un.un_inter_ap.inter_ap_prefix;
+ while (lsa_length != 0) {
+ bytelen = ospf6_print_lsaprefix(ndo, tptr, lsa_length);
+ if (bytelen < 0)
goto trunc;
- lsapp = (struct lsa_prefix *)(((u_char *)lsapp) + k);
+ lsa_length -= bytelen;
+ tptr += bytelen;
}
break;
- case LS_SCOPE_AS | LS_TYPE_ASE:
- TCHECK(lsap->lsa_un.un_asla.asla_metric);
- flags32 = EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric);
- ospf6_print_bits(ospf6_asla_flag_bits, flags32);
- printf(" metric %u",
- EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric) &
- ASLA_MASK_METRIC);
- lsapp = lsap->lsa_un.un_asla.asla_prefix;
- k = ospf6_print_lsaprefix(lsapp);
- if (k < 0)
- goto trunc;
- if ((ls_opt = (u_char *)(((u_char *)lsapp) + k)) < ls_end) {
- struct in6_addr *fwdaddr6;
- if ((flags32 & ASLA_FLAG_FWDADDR) != 0) {
- fwdaddr6 = (struct in6_addr *)ls_opt;
- TCHECK(*fwdaddr6);
- printf(" forward %s",
- ip6addr_string(fwdaddr6));
-
- ls_opt += sizeof(struct in6_addr);
- }
-
- if ((flags32 & ASLA_FLAG_ROUTETAG) != 0) {
- TCHECK(*(u_int32_t *)ls_opt);
- printf(" tag %s",
- ipaddr_string((u_int32_t *)ls_opt));
-
- ls_opt += sizeof(u_int32_t);
- }
-
- if (lsapp->lsa_p_mbz) {
- TCHECK(*(u_int32_t *)ls_opt);
- printf(" RefLSID: %s",
- ipaddr_string((u_int32_t *)ls_opt));
-
- ls_opt += sizeof(u_int32_t);
- }
- }
- break;
-#if 0
- case LS_TYPE_SUM_ABR:
- TCHECK(lsap->lsa_un.un_sla.sla_tosmetric);
- lp = lsap->lsa_un.un_sla.sla_tosmetric;
- while ((u_char *)lp < ls_end) {
- register u_int32_t ul;
-
- TCHECK(*lp);
- ul = EXTRACT_32BITS(lp);
- printf(" tos %d metric %d",
- (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS,
- ul & SLA_MASK_METRIC);
- ++lp;
+ case LS_TYPE_ASE | LS_SCOPE_AS:
+ if (lsa_length < sizeof (lsap->lsa_un.un_asla.asla_metric))
+ return (1);
+ lsa_length -= sizeof (lsap->lsa_un.un_asla.asla_metric);
+ ND_TCHECK(lsap->lsa_un.un_asla.asla_metric);
+ flags32 = EXTRACT_BE_U_4(&lsap->lsa_un.un_asla.asla_metric);
+ ND_PRINT((ndo, "\n\t Flags [%s]",
+ bittok2str(ospf6_asla_flag_values, "none", flags32)));
+ ND_PRINT((ndo, " metric %u",
+ EXTRACT_BE_U_4(&lsap->lsa_un.un_asla.asla_metric) &
+ ASLA_MASK_METRIC));
+
+ tptr = (const uint8_t *)lsap->lsa_un.un_asla.asla_prefix;
+ lsapp = (const struct lsa6_prefix *)tptr;
+ bytelen = ospf6_print_lsaprefix(ndo, tptr, lsa_length);
+ if (bytelen < 0)
+ goto trunc;
+ lsa_length -= bytelen;
+ tptr += bytelen;
+
+ if ((flags32 & ASLA_FLAG_FWDADDR) != 0) {
+ const struct in6_addr *fwdaddr6;
+
+ fwdaddr6 = (const struct in6_addr *)tptr;
+ if (lsa_length < sizeof (*fwdaddr6))
+ return (1);
+ lsa_length -= sizeof (*fwdaddr6);
+ ND_TCHECK(*fwdaddr6);
+ ND_PRINT((ndo, " forward %s",
+ ip6addr_string(ndo, fwdaddr6)));
+ tptr += sizeof(*fwdaddr6);
}
- break;
- case LS_TYPE_GROUP:
- /* Multicast extensions as of 23 July 1991 */
- mcp = lsap->lsa_un.un_mcla;
- while ((u_char *)mcp < ls_end) {
- TCHECK(mcp->mcla_vid);
- switch (EXTRACT_32BITS(&mcp->mcla_vtype)) {
-
- case MCLA_VERTEX_ROUTER:
- printf(" rtr rtrid %s",
- ipaddr_string(&mcp->mcla_vid));
- break;
-
- case MCLA_VERTEX_NETWORK:
- printf(" net dr %s",
- ipaddr_string(&mcp->mcla_vid));
- break;
+ if ((flags32 & ASLA_FLAG_ROUTETAG) != 0) {
+ if (lsa_length < sizeof (uint32_t))
+ return (1);
+ lsa_length -= sizeof (uint32_t);
+ ND_TCHECK(*(const uint32_t *)tptr);
+ ND_PRINT((ndo, " tag %s",
+ ipaddr_string(ndo, (const uint32_t *)tptr)));
+ tptr += sizeof(uint32_t);
+ }
- default:
- printf(" ??VertexType %u??",
- EXTRACT_32BITS(&mcp->mcla_vtype));
- break;
- }
- ++mcp;
+ if (lsapp->lsa_p_metric) {
+ if (lsa_length < sizeof (uint32_t))
+ return (1);
+ lsa_length -= sizeof (uint32_t);
+ ND_TCHECK(*(const uint32_t *)tptr);
+ ND_PRINT((ndo, " RefLSID: %s",
+ ipaddr_string(ndo, (const uint32_t *)tptr)));
+ tptr += sizeof(uint32_t);
}
-#endif
+ break;
case LS_TYPE_LINK:
/* Link LSA */
llsap = &lsap->lsa_un.un_llsa;
- TCHECK(llsap->llsa_options);
- ospf6_print_bits(ospf6_option_bits, EXTRACT_32BITS(&llsap->llsa_options));
- TCHECK(llsap->llsa_nprefix);
- printf(" pri %d lladdr %s npref %d", llsap->llsa_priority,
- ip6addr_string(&llsap->llsa_lladdr),
- EXTRACT_32BITS(&llsap->llsa_nprefix));
- lsapp = llsap->llsa_prefix;
- for (j = 0; j < EXTRACT_32BITS(&llsap->llsa_nprefix); j++) {
- k = ospf6_print_lsaprefix(lsapp);
- if (k)
+ if (lsa_length < sizeof (llsap->llsa_priandopt))
+ return (1);
+ lsa_length -= sizeof (llsap->llsa_priandopt);
+ ND_TCHECK(llsap->llsa_priandopt);
+ ND_PRINT((ndo, "\n\t Options [%s]",
+ bittok2str(ospf6_option_values, "none",
+ EXTRACT_BE_U_4(&llsap->llsa_options))));
+
+ if (lsa_length < sizeof (llsap->llsa_lladdr) + sizeof (llsap->llsa_nprefix))
+ return (1);
+ lsa_length -= sizeof (llsap->llsa_lladdr) + sizeof (llsap->llsa_nprefix);
+ ND_TCHECK(llsap->llsa_nprefix);
+ prefixes = EXTRACT_BE_U_4(&llsap->llsa_nprefix);
+ ND_PRINT((ndo, "\n\t Priority %d, Link-local address %s, Prefixes %d:",
+ llsap->llsa_priority,
+ ip6addr_string(ndo, &llsap->llsa_lladdr),
+ prefixes));
+
+ tptr = (const uint8_t *)llsap->llsa_prefix;
+ while (prefixes > 0) {
+ bytelen = ospf6_print_lsaprefix(ndo, tptr, lsa_length);
+ if (bytelen < 0)
goto trunc;
- lsapp = (struct lsa_prefix *)(((u_char *)lsapp) + k);
+ prefixes--;
+ lsa_length -= bytelen;
+ tptr += bytelen;
}
break;
case LS_TYPE_INTRA_AP | LS_SCOPE_AREA:
/* Intra-Area-Prefix LSA */
- TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_rtid);
- ospf6_print_ls_type(
- EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_lstype),
- &lsap->lsa_un.un_intra_ap.intra_ap_lsid,
- &lsap->lsa_un.un_intra_ap.intra_ap_rtid,
- "LinkStateType %d");
- TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
- printf(" npref %d",
- EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_nprefix));
-
- lsapp = lsap->lsa_un.un_intra_ap.intra_ap_prefix;
- for (j = 0;
- j < EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
- j++) {
- k = ospf6_print_lsaprefix(lsapp);
- if (k)
+ if (lsa_length < sizeof (lsap->lsa_un.un_intra_ap.intra_ap_rtid))
+ return (1);
+ lsa_length -= sizeof (lsap->lsa_un.un_intra_ap.intra_ap_rtid);
+ ND_TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_rtid);
+ ospf6_print_ls_type(ndo,
+ EXTRACT_BE_U_2(&lsap->lsa_un.un_intra_ap.intra_ap_lstype),
+ &lsap->lsa_un.un_intra_ap.intra_ap_lsid);
+
+ if (lsa_length < sizeof (lsap->lsa_un.un_intra_ap.intra_ap_nprefix))
+ return (1);
+ lsa_length -= sizeof (lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
+ ND_TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
+ prefixes = EXTRACT_BE_U_2(&lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
+ ND_PRINT((ndo, "\n\t Prefixes %d:", prefixes));
+
+ tptr = (const uint8_t *)lsap->lsa_un.un_intra_ap.intra_ap_prefix;
+ while (prefixes > 0) {
+ bytelen = ospf6_print_lsaprefix(ndo, tptr, lsa_length);
+ if (bytelen < 0)
goto trunc;
- lsapp = (struct lsa_prefix *)(((u_char *)lsapp) + k);
+ prefixes--;
+ lsa_length -= bytelen;
+ tptr += bytelen;
}
break;
+ case LS_TYPE_GRACE | LS_SCOPE_LINKLOCAL:
+ if (ospf_print_grace_lsa(ndo, tptr, lsa_length) == -1) {
+ return 1;
+ }
+ break;
+
+ case LS_TYPE_INTRA_ATE | LS_SCOPE_LINKLOCAL:
+ if (ospf_print_te_lsa(ndo, tptr, lsa_length) == -1) {
+ return 1;
+ }
+ break;
+
default:
- printf(" ??LinkStateType 0x%04x??",
- EXTRACT_16BITS(&lsap->ls_hdr.ls_type));
+ if(!print_unknown_data(ndo,tptr,
+ "\n\t ",
+ lsa_length)) {
+ return (1);
+ }
+ break;
}
- /* { (ctags) */
- fputs(" }", stdout);
return (0);
trunc:
- fputs(" }", stdout);
return (1);
}
static int
-ospf6_decode_v3(register const struct ospf6hdr *op,
- register const u_char *dataend)
+ospf6_decode_v3(netdissect_options *ndo,
+ register const struct ospf6hdr *op,
+ register const u_char *dataend)
{
register const rtrid_t *ap;
- register const struct lsr *lsrp;
- register const struct lsa_hdr *lshp;
- register const struct lsa *lsap;
- register char sep;
+ register const struct lsr6 *lsrp;
+ register const struct lsa6_hdr *lshp;
+ register const struct lsa6 *lsap;
register int i;
switch (op->ospf6_type) {
- case OSPF_TYPE_UMD:
- /*
- * Rob Coltun's special monitoring packets;
- * do nothing
- */
- break;
-
- case OSPF_TYPE_HELLO:
- if (vflag) {
- TCHECK(op->ospf6_hello.hello_deadint);
- ospf6_print_bits(ospf6_option_bits,
- EXTRACT_32BITS(&op->ospf6_hello.hello_options));
- printf(" ifid %s pri %d int %d dead %u",
- ipaddr_string(&op->ospf6_hello.hello_ifid),
- op->ospf6_hello.hello_priority,
- EXTRACT_16BITS(&op->ospf6_hello.hello_helloint),
- EXTRACT_16BITS(&op->ospf6_hello.hello_deadint));
- }
- TCHECK(op->ospf6_hello.hello_dr);
- if (op->ospf6_hello.hello_dr != 0)
- printf(" dr %s",
- ipaddr_string(&op->ospf6_hello.hello_dr));
- TCHECK(op->ospf6_hello.hello_bdr);
- if (op->ospf6_hello.hello_bdr != 0)
- printf(" bdr %s",
- ipaddr_string(&op->ospf6_hello.hello_bdr));
- if (vflag) {
- printf(" nbrs");
- ap = op->ospf6_hello.hello_neighbor;
- while ((u_char *)ap < dataend) {
- TCHECK(*ap);
- printf(" %s", ipaddr_string(ap));
+ case OSPF_TYPE_HELLO: {
+ register const struct hello6 *hellop = (const struct hello6 *)((const uint8_t *)op + OSPF6HDR_LEN);
+
+ ND_TCHECK_4(&hellop->hello_options);
+ ND_PRINT((ndo, "\n\tOptions [%s]",
+ bittok2str(ospf6_option_values, "none",
+ EXTRACT_BE_U_4(&hellop->hello_options))));
+
+ ND_TCHECK(hellop->hello_deadint);
+ ND_PRINT((ndo, "\n\t Hello Timer %us, Dead Timer %us, Interface-ID %s, Priority %u",
+ EXTRACT_BE_U_2(&hellop->hello_helloint),
+ EXTRACT_BE_U_2(&hellop->hello_deadint),
+ ipaddr_string(ndo, &hellop->hello_ifid),
+ hellop->hello_priority));
+
+ ND_TCHECK(hellop->hello_dr);
+ if (EXTRACT_BE_U_4(&hellop->hello_dr) != 0)
+ ND_PRINT((ndo, "\n\t Designated Router %s",
+ ipaddr_string(ndo, &hellop->hello_dr)));
+ ND_TCHECK(hellop->hello_bdr);
+ if (EXTRACT_BE_U_4(&hellop->hello_bdr) != 0)
+ ND_PRINT((ndo, ", Backup Designated Router %s",
+ ipaddr_string(ndo, &hellop->hello_bdr)));
+ if (ndo->ndo_vflag > 1) {
+ ND_PRINT((ndo, "\n\t Neighbor List:"));
+ ap = hellop->hello_neighbor;
+ while ((const u_char *)ap < dataend) {
+ ND_TCHECK(*ap);
+ ND_PRINT((ndo, "\n\t %s", ipaddr_string(ndo, ap)));
++ap;
}
}
break; /* HELLO */
+ }
- case OSPF_TYPE_DB:
- TCHECK(op->ospf6_db.db_options);
- ospf6_print_bits(ospf6_option_bits,
- EXTRACT_32BITS(&op->ospf6_db.db_options));
- sep = ' ';
- TCHECK(op->ospf6_db.db_flags);
- if (op->ospf6_db.db_flags & OSPF6_DB_INIT) {
- printf("%cI", sep);
- sep = '/';
- }
- if (op->ospf6_db.db_flags & OSPF6_DB_MORE) {
- printf("%cM", sep);
- sep = '/';
- }
- if (op->ospf6_db.db_flags & OSPF6_DB_MASTER) {
- printf("%cMS", sep);
- sep = '/';
- }
- TCHECK(op->ospf6_db.db_seq);
- printf(" mtu %u S %X", EXTRACT_16BITS(&op->ospf6_db.db_mtu),
- EXTRACT_32BITS(&op->ospf6_db.db_seq));
-
- if (vflag) {
+ case OSPF_TYPE_DD: {
+ register const struct dd6 *ddp = (const struct dd6 *)((const uint8_t *)op + OSPF6HDR_LEN);
+
+ ND_TCHECK(ddp->db_options);
+ ND_PRINT((ndo, "\n\tOptions [%s]",
+ bittok2str(ospf6_option_values, "none",
+ EXTRACT_BE_U_4(&ddp->db_options))));
+ ND_TCHECK(ddp->db_flags);
+ ND_PRINT((ndo, ", DD Flags [%s]",
+ bittok2str(ospf6_dd_flag_values,"none",ddp->db_flags)));
+
+ ND_TCHECK(ddp->db_seq);
+ ND_PRINT((ndo, ", MTU %u, DD-Sequence 0x%08x",
+ EXTRACT_BE_U_2(&ddp->db_mtu),
+ EXTRACT_BE_U_4(&ddp->db_seq)));
+ if (ndo->ndo_vflag > 1) {
/* Print all the LS adv's */
- lshp = op->ospf6_db.db_lshdr;
-
- while (!ospf6_print_lshdr(lshp)) {
- /* { (ctags) */
- printf(" }");
- ++lshp;
+ lshp = ddp->db_lshdr;
+ while ((const u_char *)lshp < dataend) {
+ if (ospf6_print_lshdr(ndo, lshp++, dataend))
+ goto trunc;
}
}
break;
+ }
- case OSPF_TYPE_LSR:
- if (vflag) {
- lsrp = op->ospf6_lsr;
- while ((u_char *)lsrp < dataend) {
- TCHECK(*lsrp);
- printf(" {"); /* } (ctags) */
- ospf6_print_ls_type(EXTRACT_16BITS(&lsrp->ls_type),
- &lsrp->ls_stateid,
- &lsrp->ls_router,
- "LinkStateType %d");
- /* { (ctags) */
- printf(" }");
+ case OSPF_TYPE_LS_REQ:
+ if (ndo->ndo_vflag > 1) {
+ lsrp = (const struct lsr6 *)((const uint8_t *)op + OSPF6HDR_LEN);
+ while ((const u_char *)lsrp < dataend) {
+ ND_TCHECK(*lsrp);
+ ND_PRINT((ndo, "\n\t Advertising Router %s",
+ ipaddr_string(ndo, &lsrp->ls_router)));
+ ospf6_print_ls_type(ndo,
+ EXTRACT_BE_U_2(&lsrp->ls_type),
+ &lsrp->ls_stateid);
++lsrp;
}
}
break;
- case OSPF_TYPE_LSU:
- if (vflag) {
- lsap = op->ospf6_lsu.lsu_lsa;
- TCHECK(op->ospf6_lsu.lsu_count);
- i = EXTRACT_32BITS(&op->ospf6_lsu.lsu_count);
- while (i--) {
- if (ospf6_print_lsa(lsap))
+ case OSPF_TYPE_LS_UPDATE:
+ if (ndo->ndo_vflag > 1) {
+ register const struct lsu6 *lsup = (const struct lsu6 *)((const uint8_t *)op + OSPF6HDR_LEN);
+
+ ND_TCHECK(lsup->lsu_count);
+ i = EXTRACT_BE_U_4(&lsup->lsu_count);
+ lsap = lsup->lsu_lsa;
+ while ((const u_char *)lsap < dataend && i--) {
+ if (ospf6_print_lsa(ndo, lsap, dataend))
goto trunc;
- lsap = (struct lsa *)((u_char *)lsap +
- EXTRACT_16BITS(&lsap->ls_hdr.ls_length));
+ lsap = (const struct lsa6 *)((const u_char *)lsap +
+ EXTRACT_BE_U_2(&lsap->ls_hdr.ls_length));
}
}
break;
-
- case OSPF_TYPE_LSA:
- if (vflag) {
- lshp = op->ospf6_lsa.lsa_lshdr;
-
- while (!ospf6_print_lshdr(lshp)) {
- /* { (ctags) */
- printf(" }");
- ++lshp;
+ case OSPF_TYPE_LS_ACK:
+ if (ndo->ndo_vflag > 1) {
+ lshp = (const struct lsa6_hdr *)((const uint8_t *)op + OSPF6HDR_LEN);
+ while ((const u_char *)lshp < dataend) {
+ if (ospf6_print_lshdr(ndo, lshp++, dataend))
+ goto trunc;
}
}
break;
default:
- printf("v3 type %d", op->ospf6_type);
break;
}
return (0);
return (1);
}
+/* RFC5613 Section 2.2 (w/o the TLVs) */
+static int
+ospf6_print_lls(netdissect_options *ndo,
+ const u_char *cp, const u_int len)
+{
+ uint16_t llsdatalen;
+
+ if (len == 0)
+ return 0;
+ if (len < OSPF_LLS_HDRLEN)
+ goto trunc;
+ /* Checksum */
+ ND_TCHECK_2(cp);
+ ND_PRINT((ndo, "\n\tLLS Checksum 0x%04x", EXTRACT_BE_U_2(cp)));
+ cp += 2;
+ /* LLS Data Length */
+ ND_TCHECK_2(cp);
+ llsdatalen = EXTRACT_BE_U_2(cp);
+ ND_PRINT((ndo, ", Data Length %u", llsdatalen));
+ if (llsdatalen < OSPF_LLS_HDRLEN || llsdatalen > len)
+ goto trunc;
+ cp += 2;
+ /* LLS TLVs */
+ ND_TCHECK2(*cp, llsdatalen - OSPF_LLS_HDRLEN);
+ /* FIXME: code in print-ospf.c can be reused to decode the TLVs */
+
+ return llsdatalen;
+trunc:
+ return -1;
+}
+
+/* RFC6506 Section 4.1 */
+static int
+ospf6_decode_at(netdissect_options *ndo,
+ const u_char *cp, const u_int len)
+{
+ uint16_t authdatalen;
+
+ if (len == 0)
+ return 0;
+ if (len < OSPF6_AT_HDRLEN)
+ goto trunc;
+ /* Authentication Type */
+ ND_TCHECK_2(cp);
+ ND_PRINT((ndo, "\n\tAuthentication Type %s", tok2str(ospf6_auth_type_str, "unknown (0x%04x)", EXTRACT_BE_U_2(cp))));
+ cp += 2;
+ /* Auth Data Len */
+ ND_TCHECK_2(cp);
+ authdatalen = EXTRACT_BE_U_2(cp);
+ ND_PRINT((ndo, ", Length %u", authdatalen));
+ if (authdatalen < OSPF6_AT_HDRLEN || authdatalen > len)
+ goto trunc;
+ cp += 2;
+ /* Reserved */
+ ND_TCHECK_2(cp);
+ cp += 2;
+ /* Security Association ID */
+ ND_TCHECK_2(cp);
+ ND_PRINT((ndo, ", SAID %u", EXTRACT_BE_U_2(cp)));
+ cp += 2;
+ /* Cryptographic Sequence Number (High-Order 32 Bits) */
+ ND_TCHECK_4(cp);
+ ND_PRINT((ndo, ", CSN 0x%08x", EXTRACT_BE_U_4(cp)));
+ cp += 4;
+ /* Cryptographic Sequence Number (Low-Order 32 Bits) */
+ ND_TCHECK_4(cp);
+ ND_PRINT((ndo, ":%08x", EXTRACT_BE_U_4(cp)));
+ cp += 4;
+ /* Authentication Data */
+ ND_TCHECK2(*cp, authdatalen - OSPF6_AT_HDRLEN);
+ if (ndo->ndo_vflag > 1)
+ print_unknown_data(ndo,cp, "\n\tAuthentication Data ", authdatalen - OSPF6_AT_HDRLEN);
+ return 0;
+
+trunc:
+ return 1;
+}
+
+/* The trailing data may include LLS and/or AT data (in this specific order).
+ * LLS data may be present only in Hello and DBDesc packets with the L-bit set.
+ * AT data may be present in Hello and DBDesc packets with the AT-bit set or in
+ * any other packet type, thus decode the AT data regardless of the AT-bit.
+ */
+static int
+ospf6_decode_v3_trailer(netdissect_options *ndo,
+ const struct ospf6hdr *op, const u_char *cp, const unsigned len)
+{
+ int llslen = 0;
+ int lls_hello = 0;
+ int lls_dd = 0;
+
+ if (op->ospf6_type == OSPF_TYPE_HELLO) {
+ const struct hello6 *hellop = (const struct hello6 *)((const uint8_t *)op + OSPF6HDR_LEN);
+ ND_TCHECK(hellop->hello_options);
+ if (EXTRACT_BE_U_4(&hellop->hello_options) & OSPF6_OPTION_L)
+ lls_hello = 1;
+ } else if (op->ospf6_type == OSPF_TYPE_DD) {
+ const struct dd6 *ddp = (const struct dd6 *)((const uint8_t *)op + OSPF6HDR_LEN);
+ ND_TCHECK(ddp->db_options);
+ if (EXTRACT_BE_U_4(&ddp->db_options) & OSPF6_OPTION_L)
+ lls_dd = 1;
+ }
+ if ((lls_hello || lls_dd) && (llslen = ospf6_print_lls(ndo, cp, len)) < 0)
+ goto trunc;
+ return ospf6_decode_at(ndo, cp + llslen, len - llslen);
+
+trunc:
+ return 1;
+}
+
void
-ospf6_print(register const u_char *bp, register u_int length)
+ospf6_print(netdissect_options *ndo,
+ register const u_char *bp, register u_int length)
{
register const struct ospf6hdr *op;
register const u_char *dataend;
register const char *cp;
+ uint16_t datalen;
- op = (struct ospf6hdr *)bp;
+ op = (const struct ospf6hdr *)bp;
/* If the type is valid translate it, or just print the type */
/* value. If it's not valid, say so and return */
- TCHECK(op->ospf6_type);
- cp = tok2str(type2str, "type%d", op->ospf6_type);
- printf("OSPFv%d-%s %d:", op->ospf6_version, cp, length);
- if (*cp == 't')
+ ND_TCHECK(op->ospf6_type);
+ cp = tok2str(ospf6_type_values, "unknown packet type (%u)", op->ospf6_type);
+ ND_PRINT((ndo, "OSPFv%u, %s, length %d", op->ospf6_version, cp, length));
+ if (*cp == 'u') {
return;
+ }
- TCHECK(op->ospf6_len);
- if (length != EXTRACT_16BITS(&op->ospf6_len)) {
- printf(" [len %d]", EXTRACT_16BITS(&op->ospf6_len));
+ if(!ndo->ndo_vflag) { /* non verbose - so lets bail out here */
return;
}
- dataend = bp + length;
- /* Print the routerid if it is not the same as the source */
- TCHECK(op->ospf6_routerid);
- printf(" rtrid %s", ipaddr_string(&op->ospf6_routerid));
+ /* OSPFv3 data always comes first and optional trailing data may follow. */
+ ND_TCHECK(op->ospf6_len);
+ datalen = EXTRACT_BE_U_2(&op->ospf6_len);
+ if (datalen > length) {
+ ND_PRINT((ndo, " [len %d]", datalen));
+ return;
+ }
+ dataend = bp + datalen;
- TCHECK(op->ospf6_areaid);
- if (op->ospf6_areaid != 0)
- printf(" area %s", ipaddr_string(&op->ospf6_areaid));
+ ND_TCHECK(op->ospf6_routerid);
+ ND_PRINT((ndo, "\n\tRouter-ID %s", ipaddr_string(ndo, &op->ospf6_routerid)));
+
+ ND_TCHECK(op->ospf6_areaid);
+ if (EXTRACT_BE_U_4(&op->ospf6_areaid) != 0)
+ ND_PRINT((ndo, ", Area %s", ipaddr_string(ndo, &op->ospf6_areaid)));
else
- printf(" backbone");
- TCHECK(op->ospf6_instanceid);
+ ND_PRINT((ndo, ", Backbone Area"));
+ ND_TCHECK(op->ospf6_instanceid);
if (op->ospf6_instanceid)
- printf(" instance %u", op->ospf6_instanceid);
+ ND_PRINT((ndo, ", Instance %u", op->ospf6_instanceid));
/* Do rest according to version. */
switch (op->ospf6_version) {
case 3:
/* ospf version 3 */
- if (ospf6_decode_v3(op, dataend))
+ if (ospf6_decode_v3(ndo, op, dataend) ||
+ ospf6_decode_v3_trailer(ndo, op, dataend, length - datalen))
goto trunc;
break;
-
- default:
- printf(" ospf [version %d]", op->ospf6_version);
- break;
} /* end switch on version */
return;
trunc:
- fputs(tstr, stdout);
+ ND_PRINT((ndo, "%s", tstr));
}
projects / tcpdump / blobdiff