diff options
Diffstat (limited to 'print-pim.c')
-rw-r--r-- | print-pim.c | 667 |
1 files changed, 353 insertions, 314 deletions
diff --git a/print-pim.c b/print-pim.c index 9c8ca547faba..f2db8c768165 100644 --- a/print-pim.c +++ b/print-pim.c @@ -22,10 +22,10 @@ /* \summary: Protocol Independent Multicast (PIM) printer */ #ifdef HAVE_CONFIG_H -#include "config.h" +#include <config.h> #endif -#include <netdissect-stdinc.h> +#include "netdissect-stdinc.h" #include "netdissect.h" #include "addrtoname.h" @@ -118,13 +118,30 @@ static const struct tok pimv2_register_flag_values[] = { { 0, NULL} }; +#define PIMV2_DF_ELECTION_OFFER 1 +#define PIMV2_DF_ELECTION_WINNER 2 +#define PIMV2_DF_ELECTION_BACKOFF 3 +#define PIMV2_DF_ELECTION_PASS 4 + +static const struct tok pimv2_df_election_flag_values[] = { + { PIMV2_DF_ELECTION_OFFER, "Offer" }, + { PIMV2_DF_ELECTION_WINNER, "Winner" }, + { PIMV2_DF_ELECTION_BACKOFF, "Backoff" }, + { PIMV2_DF_ELECTION_PASS, "Pass" }, + { 0, NULL} +}; + +#define PIMV2_DF_ELECTION_PASS_BACKOFF_STR(x) ( \ + x == PIMV2_DF_ELECTION_BACKOFF ? "offer" : "new winner" ) + + /* * XXX: We consider a case where IPv6 is not ready yet for portability, - * but PIM dependent defintions should be independent of IPv6... + * but PIM dependent definitions should be independent of IPv6... */ struct pim { - uint8_t pim_typever; + nd_uint8_t pim_typever; /* upper 4bit: PIM version number; 2 for PIMv2 */ /* lower 4bit: the PIM message type, currently they are: * Hello, Register, Register-Stop, Join/Prune, @@ -133,57 +150,56 @@ struct pim { */ #define PIM_VER(x) (((x) & 0xf0) >> 4) #define PIM_TYPE(x) ((x) & 0x0f) - u_char pim_rsv; /* Reserved */ - u_short pim_cksum; /* IP style check sum */ + nd_uint8_t pim_rsv; /* Reserved in v1, subtype+address length in v2 */ +#define PIM_SUBTYPE(x) (((x) & 0xf0) >> 4) + nd_uint16_t pim_cksum; /* IP style check sum */ }; -static void pimv2_print(netdissect_options *, register const u_char *bp, register u_int len, const u_char *); +static void pimv2_print(netdissect_options *, const u_char *bp, u_int len, const u_char *); static void pimv1_join_prune_print(netdissect_options *ndo, - register const u_char *bp, register u_int len) + const u_char *bp, u_int len) { - int ngroups, njoin, nprune; - int njp; + u_int ngroups, njoin, nprune; + u_int njp; /* If it's a single group and a single source, use 1-line output. */ - if (ND_TTEST2(bp[0], 30) && bp[11] == 1 && - ((njoin = EXTRACT_16BITS(&bp[20])) + EXTRACT_16BITS(&bp[22])) == 1) { - int hold; + if (ND_TTEST_LEN(bp, 30) && GET_U_1(bp + 11) == 1 && + ((njoin = GET_BE_U_2(bp + 20)) + GET_BE_U_2(bp + 22)) == 1) { + u_int hold; - ND_PRINT((ndo, " RPF %s ", ipaddr_string(ndo, bp))); - hold = EXTRACT_16BITS(&bp[6]); + ND_PRINT(" RPF %s ", GET_IPADDR_STRING(bp)); + hold = GET_BE_U_2(bp + 6); if (hold != 180) { - ND_PRINT((ndo, "Hold ")); + ND_PRINT("Hold "); unsigned_relts_print(ndo, hold); } - ND_PRINT((ndo, "%s (%s/%d, %s", njoin ? "Join" : "Prune", - ipaddr_string(ndo, &bp[26]), bp[25] & 0x3f, - ipaddr_string(ndo, &bp[12]))); - if (EXTRACT_32BITS(&bp[16]) != 0xffffffff) - ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[16]))); - ND_PRINT((ndo, ") %s%s %s", - (bp[24] & 0x01) ? "Sparse" : "Dense", - (bp[25] & 0x80) ? " WC" : "", - (bp[25] & 0x40) ? "RP" : "SPT")); + ND_PRINT("%s (%s/%u, %s", njoin ? "Join" : "Prune", + GET_IPADDR_STRING(bp + 26), GET_U_1(bp + 25) & 0x3f, + GET_IPADDR_STRING(bp + 12)); + if (GET_BE_U_4(bp + 16) != 0xffffffff) + ND_PRINT("/%s", GET_IPADDR_STRING(bp + 16)); + ND_PRINT(") %s%s %s", + (GET_U_1(bp + 24) & 0x01) ? "Sparse" : "Dense", + (GET_U_1(bp + 25) & 0x80) ? " WC" : "", + (GET_U_1(bp + 25) & 0x40) ? "RP" : "SPT"); return; } - if (len < sizeof(struct in_addr)) + if (len < sizeof(nd_ipv4)) goto trunc; - ND_TCHECK2(bp[0], sizeof(struct in_addr)); if (ndo->ndo_vflag > 1) - ND_PRINT((ndo, "\n")); - ND_PRINT((ndo, " Upstream Nbr: %s", ipaddr_string(ndo, bp))); + ND_PRINT("\n"); + ND_PRINT(" Upstream Nbr: %s", GET_IPADDR_STRING(bp)); bp += 4; len -= 4; if (len < 4) goto trunc; - ND_TCHECK2(bp[2], 2); if (ndo->ndo_vflag > 1) - ND_PRINT((ndo, "\n")); - ND_PRINT((ndo, " Hold time: ")); - unsigned_relts_print(ndo, EXTRACT_16BITS(&bp[2])); + ND_PRINT("\n"); + ND_PRINT(" Hold time: "); + unsigned_relts_print(ndo, GET_BE_U_2(bp + 2)); if (ndo->ndo_vflag < 2) return; bp += 4; @@ -191,34 +207,30 @@ pimv1_join_prune_print(netdissect_options *ndo, if (len < 4) goto trunc; - ND_TCHECK2(bp[0], 4); - ngroups = bp[3]; + ngroups = GET_U_1(bp + 3); bp += 4; len -= 4; - while (ngroups--) { + while (ngroups != 0) { /* * XXX - does the address have length "addrlen" and the * mask length "maddrlen"? */ if (len < 4) goto trunc; - ND_TCHECK2(bp[0], sizeof(struct in_addr)); - ND_PRINT((ndo, "\n\tGroup: %s", ipaddr_string(ndo, bp))); + ND_PRINT("\n\tGroup: %s", GET_IPADDR_STRING(bp)); bp += 4; len -= 4; if (len < 4) goto trunc; - ND_TCHECK2(bp[0], sizeof(struct in_addr)); - if (EXTRACT_32BITS(&bp[0]) != 0xffffffff) - ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[0]))); + if (GET_BE_U_4(bp) != 0xffffffff) + ND_PRINT("/%s", GET_IPADDR_STRING(bp)); bp += 4; len -= 4; if (len < 4) goto trunc; - ND_TCHECK2(bp[0], 4); - njoin = EXTRACT_16BITS(&bp[0]); - nprune = EXTRACT_16BITS(&bp[2]); - ND_PRINT((ndo, " joined: %d pruned: %d", njoin, nprune)); + njoin = GET_BE_U_2(bp); + nprune = GET_BE_U_2(bp + 2); + ND_PRINT(" joined: %u pruned: %u", njoin, nprune); bp += 4; len -= 4; for (njp = 0; njp < (njoin + nprune); njp++) { @@ -230,90 +242,84 @@ pimv1_join_prune_print(netdissect_options *ndo, type = "Prune"; if (len < 6) goto trunc; - ND_TCHECK2(bp[0], 6); - ND_PRINT((ndo, "\n\t%s %s%s%s%s/%d", type, - (bp[0] & 0x01) ? "Sparse " : "Dense ", - (bp[1] & 0x80) ? "WC " : "", - (bp[1] & 0x40) ? "RP " : "SPT ", - ipaddr_string(ndo, &bp[2]), - bp[1] & 0x3f)); + ND_PRINT("\n\t%s %s%s%s%s/%u", type, + (GET_U_1(bp) & 0x01) ? "Sparse " : "Dense ", + (GET_U_1(bp + 1) & 0x80) ? "WC " : "", + (GET_U_1(bp + 1) & 0x40) ? "RP " : "SPT ", + GET_IPADDR_STRING(bp + 2), + GET_U_1(bp + 1) & 0x3f); bp += 6; len -= 6; } + ngroups--; } return; trunc: - ND_PRINT((ndo, "[|pim]")); - return; + nd_print_trunc(ndo); } void pimv1_print(netdissect_options *ndo, - register const u_char *bp, register u_int len) + const u_char *bp, u_int len) { - register u_char type; + u_char type; - ND_TCHECK(bp[1]); - type = bp[1]; + ndo->ndo_protocol = "pimv1"; + type = GET_U_1(bp + 1); - ND_PRINT((ndo, " %s", tok2str(pimv1_type_str, "[type %u]", type))); + ND_PRINT(" %s", tok2str(pimv1_type_str, "[type %u]", type)); switch (type) { case PIMV1_TYPE_QUERY: - if (ND_TTEST(bp[8])) { - switch (bp[8] >> 4) { + if (ND_TTEST_1(bp + 8)) { + switch (GET_U_1(bp + 8) >> 4) { case 0: - ND_PRINT((ndo, " Dense-mode")); + ND_PRINT(" Dense-mode"); break; case 1: - ND_PRINT((ndo, " Sparse-mode")); + ND_PRINT(" Sparse-mode"); break; case 2: - ND_PRINT((ndo, " Sparse-Dense-mode")); + ND_PRINT(" Sparse-Dense-mode"); break; default: - ND_PRINT((ndo, " mode-%d", bp[8] >> 4)); + ND_PRINT(" mode-%u", GET_U_1(bp + 8) >> 4); break; } } if (ndo->ndo_vflag) { - ND_TCHECK2(bp[10],2); - ND_PRINT((ndo, " (Hold-time ")); - unsigned_relts_print(ndo, EXTRACT_16BITS(&bp[10])); - ND_PRINT((ndo, ")")); + ND_PRINT(" (Hold-time "); + unsigned_relts_print(ndo, GET_BE_U_2(bp + 10)); + ND_PRINT(")"); } break; case PIMV1_TYPE_REGISTER: - ND_TCHECK2(bp[8], 20); /* ip header */ - ND_PRINT((ndo, " for %s > %s", ipaddr_string(ndo, &bp[20]), - ipaddr_string(ndo, &bp[24]))); + ND_TCHECK_LEN(bp + 8, 20); /* ip header */ + ND_PRINT(" for %s > %s", GET_IPADDR_STRING(bp + 20), + GET_IPADDR_STRING(bp + 24)); break; case PIMV1_TYPE_REGISTER_STOP: - ND_TCHECK2(bp[12], sizeof(struct in_addr)); - ND_PRINT((ndo, " for %s > %s", ipaddr_string(ndo, &bp[8]), - ipaddr_string(ndo, &bp[12]))); + ND_PRINT(" for %s > %s", GET_IPADDR_STRING(bp + 8), + GET_IPADDR_STRING(bp + 12)); break; case PIMV1_TYPE_RP_REACHABILITY: if (ndo->ndo_vflag) { - ND_TCHECK2(bp[22], 2); - ND_PRINT((ndo, " group %s", ipaddr_string(ndo, &bp[8]))); - if (EXTRACT_32BITS(&bp[12]) != 0xffffffff) - ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[12]))); - ND_PRINT((ndo, " RP %s hold ", ipaddr_string(ndo, &bp[16]))); - unsigned_relts_print(ndo, EXTRACT_16BITS(&bp[22])); + ND_PRINT(" group %s", GET_IPADDR_STRING(bp + 8)); + if (GET_BE_U_4(bp + 12) != 0xffffffff) + ND_PRINT("/%s", GET_IPADDR_STRING(bp + 12)); + ND_PRINT(" RP %s hold ", GET_IPADDR_STRING(bp + 16)); + unsigned_relts_print(ndo, GET_BE_U_2(bp + 22)); } break; case PIMV1_TYPE_ASSERT: - ND_TCHECK2(bp[16], sizeof(struct in_addr)); - ND_PRINT((ndo, " for %s > %s", ipaddr_string(ndo, &bp[16]), - ipaddr_string(ndo, &bp[8]))); - if (EXTRACT_32BITS(&bp[12]) != 0xffffffff) - ND_PRINT((ndo, "/%s", ipaddr_string(ndo, &bp[12]))); - ND_TCHECK2(bp[24], 4); - ND_PRINT((ndo, " %s pref %d metric %d", - (bp[20] & 0x80) ? "RP-tree" : "SPT", - EXTRACT_32BITS(&bp[20]) & 0x7fffffff, - EXTRACT_32BITS(&bp[24]))); + ND_PRINT(" for %s > %s", GET_IPADDR_STRING(bp + 16), + GET_IPADDR_STRING(bp + 8)); + if (GET_BE_U_4(bp + 12) != 0xffffffff) + ND_PRINT("/%s", GET_IPADDR_STRING(bp + 12)); + ND_PRINT(" %s pref %u metric %u", + (GET_U_1(bp + 20) & 0x80) ? "RP-tree" : "SPT", + GET_BE_U_4(bp + 20) & 0x7fffffff, + GET_BE_U_4(bp + 24)); break; case PIMV1_TYPE_JOIN_PRUNE: case PIMV1_TYPE_GRAFT: @@ -321,18 +327,16 @@ pimv1_print(netdissect_options *ndo, if (ndo->ndo_vflag) { if (len < 8) goto trunc; - pimv1_join_prune_print(ndo, &bp[8], len - 8); + pimv1_join_prune_print(ndo, bp + 8, len - 8); } break; } - ND_TCHECK(bp[4]); - if ((bp[4] >> 4) != 1) - ND_PRINT((ndo, " [v%d]", bp[4] >> 4)); + if ((GET_U_1(bp + 4) >> 4) != 1) + ND_PRINT(" [v%u]", GET_U_1(bp + 4) >> 4); return; trunc: - ND_PRINT((ndo, "[|pim]")); - return; + nd_print_trunc(ndo); } /* @@ -343,39 +347,37 @@ trunc: */ void cisco_autorp_print(netdissect_options *ndo, - register const u_char *bp, register u_int len) + const u_char *bp, u_int len) { - int type; - int numrps; - int hold; + u_int type; + u_int numrps; + u_int hold; + ndo->ndo_protocol = "cisco_autorp"; if (len < 8) goto trunc; - ND_TCHECK(bp[0]); - ND_PRINT((ndo, " auto-rp ")); - type = bp[0]; + ND_PRINT(" auto-rp "); + type = GET_U_1(bp); switch (type) { case 0x11: - ND_PRINT((ndo, "candidate-advert")); + ND_PRINT("candidate-advert"); break; case 0x12: - ND_PRINT((ndo, "mapping")); + ND_PRINT("mapping"); break; default: - ND_PRINT((ndo, "type-0x%02x", type)); + ND_PRINT("type-0x%02x", type); break; } - ND_TCHECK(bp[1]); - numrps = bp[1]; + numrps = GET_U_1(bp + 1); - ND_TCHECK2(bp[2], 2); - ND_PRINT((ndo, " Hold ")); - hold = EXTRACT_16BITS(&bp[2]); + ND_PRINT(" Hold "); + hold = GET_BE_U_2(bp + 2); if (hold) - unsigned_relts_print(ndo, EXTRACT_16BITS(&bp[2])); + unsigned_relts_print(ndo, GET_BE_U_2(bp + 2)); else - ND_PRINT((ndo, "FOREVER")); + ND_PRINT("FOREVER"); /* Next 4 bytes are reserved. */ @@ -394,101 +396,92 @@ cisco_autorp_print(netdissect_options *ndo, * 8 bits: mask 32 bits: source * lather, rinse, repeat. */ - while (numrps--) { - int nentries; + while (numrps != 0) { + u_int nentries; char s; if (len < 4) goto trunc; - ND_TCHECK2(bp[0], 4); - ND_PRINT((ndo, " RP %s", ipaddr_string(ndo, bp))); + ND_PRINT(" RP %s", GET_IPADDR_STRING(bp)); bp += 4; len -= 4; if (len < 1) goto trunc; - ND_TCHECK(bp[0]); - switch (bp[0] & 0x3) { - case 0: ND_PRINT((ndo, " PIMv?")); + switch (GET_U_1(bp) & 0x3) { + case 0: ND_PRINT(" PIMv?"); break; - case 1: ND_PRINT((ndo, " PIMv1")); + case 1: ND_PRINT(" PIMv1"); break; - case 2: ND_PRINT((ndo, " PIMv2")); + case 2: ND_PRINT(" PIMv2"); break; - case 3: ND_PRINT((ndo, " PIMv1+2")); + case 3: ND_PRINT(" PIMv1+2"); break; } - if (bp[0] & 0xfc) - ND_PRINT((ndo, " [rsvd=0x%02x]", bp[0] & 0xfc)); + if (GET_U_1(bp) & 0xfc) + ND_PRINT(" [rsvd=0x%02x]", GET_U_1(bp) & 0xfc); bp += 1; len -= 1; if (len < 1) goto trunc; - ND_TCHECK(bp[0]); - nentries = bp[0]; + nentries = GET_U_1(bp); bp += 1; len -= 1; s = ' '; - for (; nentries; nentries--) { + while (nentries != 0) { if (len < 6) goto trunc; - ND_TCHECK2(bp[0], 6); - ND_PRINT((ndo, "%c%s%s/%d", s, bp[0] & 1 ? "!" : "", - ipaddr_string(ndo, &bp[2]), bp[1])); - if (bp[0] & 0x02) { - ND_PRINT((ndo, " bidir")); + ND_PRINT("%c%s%s/%u", s, GET_U_1(bp) & 1 ? "!" : "", + GET_IPADDR_STRING(bp + 2), GET_U_1(bp + 1)); + if (GET_U_1(bp) & 0x02) { + ND_PRINT(" bidir"); } - if (bp[0] & 0xfc) { - ND_PRINT((ndo, "[rsvd=0x%02x]", bp[0] & 0xfc)); + if (GET_U_1(bp) & 0xfc) { + ND_PRINT("[rsvd=0x%02x]", GET_U_1(bp) & 0xfc); } s = ','; bp += 6; len -= 6; + nentries--; } + numrps--; } return; trunc: - ND_PRINT((ndo, "[|autorp]")); - return; + nd_print_trunc(ndo); } void pim_print(netdissect_options *ndo, - register const u_char *bp, register u_int len, const u_char *bp2) + const u_char *bp, u_int len, const u_char *bp2) { - register const struct pim *pim = (const struct pim *)bp; + const struct pim *pim = (const struct pim *)bp; + uint8_t pim_typever; -#ifdef notyet /* currently we see only version and type */ - ND_TCHECK(pim->pim_rsv); -#endif + ndo->ndo_protocol = "pim"; - ND_TCHECK(pim->pim_typever); - switch (PIM_VER(pim->pim_typever)) { + pim_typever = GET_U_1(pim->pim_typever); + switch (PIM_VER(pim_typever)) { case 2: if (!ndo->ndo_vflag) { - ND_PRINT((ndo, "PIMv%u, %s, length %u", - PIM_VER(pim->pim_typever), - tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)), - len)); + ND_PRINT("PIMv%u, %s, length %u", + PIM_VER(pim_typever), + tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim_typever)), + len); return; } else { - ND_PRINT((ndo, "PIMv%u, length %u\n\t%s", - PIM_VER(pim->pim_typever), + ND_PRINT("PIMv%u, length %u\n\t%s", + PIM_VER(pim_typever), len, - tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim->pim_typever)))); + tok2str(pimv2_type_values,"Unknown Type",PIM_TYPE(pim_typever))); pimv2_print(ndo, bp, len, bp2); } break; default: - ND_PRINT((ndo, "PIMv%u, length %u", - PIM_VER(pim->pim_typever), - len)); + ND_PRINT("PIMv%u, length %u", + PIM_VER(pim_typever), + len); break; } - return; - -trunc: - ND_PRINT((ndo, "[|pim]")); - return; } /* @@ -560,34 +553,33 @@ pimv2_addr_print(netdissect_options *ndo, const u_char *bp, u_int len, enum pimv2_addrtype at, u_int addr_len, int silent) { - int af; + u_int af; int hdrlen; if (addr_len == 0) { if (len < 2) goto trunc; - ND_TCHECK(bp[1]); - switch (bp[0]) { + switch (GET_U_1(bp)) { case 1: af = AF_INET; - addr_len = (u_int)sizeof(struct in_addr); + addr_len = (u_int)sizeof(nd_ipv4); break; case 2: af = AF_INET6; - addr_len = (u_int)sizeof(struct in6_addr); + addr_len = (u_int)sizeof(nd_ipv6); break; default: return -1; } - if (bp[1] != 0) + if (GET_U_1(bp + 1) != 0) return -1; hdrlen = 2; } else { switch (addr_len) { - case sizeof(struct in_addr): + case sizeof(nd_ipv4): af = AF_INET; break; - case sizeof(struct in6_addr): + case sizeof(nd_ipv6): af = AF_INET6; break; default: @@ -603,47 +595,48 @@ pimv2_addr_print(netdissect_options *ndo, case pimv2_unicast: if (len < addr_len) goto trunc; - ND_TCHECK2(bp[0], addr_len); + ND_TCHECK_LEN(bp, addr_len); if (af == AF_INET) { if (!silent) - ND_PRINT((ndo, "%s", ipaddr_string(ndo, bp))); + ND_PRINT("%s", GET_IPADDR_STRING(bp)); } else if (af == AF_INET6) { if (!silent) - ND_PRINT((ndo, "%s", ip6addr_string(ndo, bp))); + ND_PRINT("%s", GET_IP6ADDR_STRING(bp)); } return hdrlen + addr_len; case pimv2_group: case pimv2_source: if (len < addr_len + 2) goto trunc; - ND_TCHECK2(bp[0], addr_len + 2); + ND_TCHECK_LEN(bp, addr_len + 2); if (af == AF_INET) { if (!silent) { - ND_PRINT((ndo, "%s", ipaddr_string(ndo, bp + 2))); - if (bp[1] != 32) - ND_PRINT((ndo, "/%u", bp[1])); + ND_PRINT("%s", GET_IPADDR_STRING(bp + 2)); + if (GET_U_1(bp + 1) != 32) + ND_PRINT("/%u", GET_U_1(bp + 1)); } } else if (af == AF_INET6) { if (!silent) { - ND_PRINT((ndo, "%s", ip6addr_string(ndo, bp + 2))); - if (bp[1] != 128) - ND_PRINT((ndo, "/%u", bp[1])); + ND_PRINT("%s", GET_IP6ADDR_STRING(bp + 2)); + if (GET_U_1(bp + 1) != 128) + ND_PRINT("/%u", GET_U_1(bp + 1)); } } - if (bp[0] && !silent) { + if (GET_U_1(bp) && !silent) { if (at == pimv2_group) { - ND_PRINT((ndo, "(0x%02x)", bp[0])); + ND_PRINT("(0x%02x)", GET_U_1(bp)); } else { - ND_PRINT((ndo, "(%s%s%s", - bp[0] & 0x04 ? "S" : "", - bp[0] & 0x02 ? "W" : "", - bp[0] & 0x01 ? "R" : "")); - if (bp[0] & 0xf8) { - ND_PRINT((ndo, "+0x%02x", bp[0] & 0xf8)); + ND_PRINT("(%s%s%s", + GET_U_1(bp) & 0x04 ? "S" : "", + GET_U_1(bp) & 0x02 ? "W" : "", + GET_U_1(bp) & 0x01 ? "R" : ""); + if (GET_U_1(bp) & 0xf8) { + ND_PRINT("+0x%02x", + GET_U_1(bp) & 0xf8); } - ND_PRINT((ndo, ")")); + ND_PRINT(")"); } } return hdrlen + 2 + addr_len; @@ -667,7 +660,7 @@ pimv2_check_checksum(netdissect_options *ndo, const u_char *bp, const struct ip *ip; u_int cksum; - if (!ND_TTEST2(bp[0], len)) { + if (!ND_TTEST_LEN(bp, len)) { /* We don't have all the data. */ return (UNVERIFIED); } @@ -692,28 +685,37 @@ pimv2_check_checksum(netdissect_options *ndo, const u_char *bp, static void pimv2_print(netdissect_options *ndo, - register const u_char *bp, register u_int len, const u_char *bp2) + const u_char *bp, u_int len, const u_char *bp2) { - register const struct pim *pim = (const struct pim *)bp; + const struct pim *pim = (const struct pim *)bp; int advance; + int subtype; enum checksum_status cksum_status; - int pimv2_addr_len; + u_int pim_typever; + u_int pimv2_addr_len; - if (len < 2) - goto trunc; - ND_TCHECK(pim->pim_rsv); - pimv2_addr_len = pim->pim_rsv; + ndo->ndo_protocol = "pimv2"; + if (len < 2) { + ND_PRINT("[length %u < 2]", len); + nd_print_invalid(ndo); + return; + } + pim_typever = GET_U_1(pim->pim_typever); + /* RFC5015 allocates the high 4 bits of pim_rsv for "subtype". */ + pimv2_addr_len = GET_U_1(pim->pim_rsv) & 0x0f; if (pimv2_addr_len != 0) - ND_PRINT((ndo, ", RFC2117-encoding")); + ND_PRINT(", RFC2117-encoding"); - if (len < 4) - goto trunc; - ND_TCHECK(pim->pim_cksum); - ND_PRINT((ndo, ", cksum 0x%04x ", EXTRACT_16BITS(&pim->pim_cksum))); - if (EXTRACT_16BITS(&pim->pim_cksum) == 0) { - ND_PRINT((ndo, "(unverified)")); + if (len < 4) { + ND_PRINT("[length %u < 4]", len); + nd_print_invalid(ndo); + return; + } + ND_PRINT(", cksum 0x%04x ", GET_BE_U_2(pim->pim_cksum)); + if (GET_BE_U_2(pim->pim_cksum) == 0) { + ND_PRINT("(unverified)"); } else { - if (PIM_TYPE(pim->pim_typever) == PIMV2_TYPE_REGISTER) { + if (PIM_TYPE(pim_typever) == PIMV2_TYPE_REGISTER) { /* * The checksum only covers the packet header, * not the encapsulated packet. @@ -737,62 +739,66 @@ pimv2_print(netdissect_options *ndo, switch (cksum_status) { case CORRECT: - ND_PRINT((ndo, "(correct)")); + ND_PRINT("(correct)"); break; case INCORRECT: - ND_PRINT((ndo, "(incorrect)")); + ND_PRINT("(incorrect)"); break; case UNVERIFIED: - ND_PRINT((ndo, "(unverified)")); + ND_PRINT("(unverified)"); break; } } bp += 4; len -= 4; - switch (PIM_TYPE(pim->pim_typever)) { + switch (PIM_TYPE(pim_typever)) { case PIMV2_TYPE_HELLO: { uint16_t otype, olen; while (len > 0) { if (len < 4) goto trunc; - ND_TCHECK2(bp[0], 4); - otype = EXTRACT_16BITS(&bp[0]); - olen = EXTRACT_16BITS(&bp[2]); - ND_PRINT((ndo, "\n\t %s Option (%u), length %u, Value: ", + otype = GET_BE_U_2(bp); + olen = GET_BE_U_2(bp + 2); + ND_PRINT("\n\t %s Option (%u), length %u, Value: ", tok2str(pimv2_hello_option_values, "Unknown", otype), otype, - olen)); + olen); bp += 4; len -= 4; if (len < olen) goto trunc; - ND_TCHECK2(bp[0], olen); + ND_TCHECK_LEN(bp, olen); switch (otype) { case PIMV2_HELLO_OPTION_HOLDTIME: if (olen != 2) { - ND_PRINT((ndo, "ERROR: Option Length != 2 Bytes (%u)", olen)); + ND_PRINT("[option length %u != 2]", olen); + nd_print_invalid(ndo); + return; } else { - unsigned_relts_print(ndo, EXTRACT_16BITS(bp)); + unsigned_relts_print(ndo, + GET_BE_U_2(bp)); } break; case PIMV2_HELLO_OPTION_LANPRUNEDELAY: if (olen != 4) { - ND_PRINT((ndo, "ERROR: Option Length != 4 Bytes (%u)", olen)); + ND_PRINT("[option length %u != 4]", olen); + nd_print_invalid(ndo); + return; } else { char t_bit; uint16_t lan_delay, override_interval; - lan_delay = EXTRACT_16BITS(bp); - override_interval = EXTRACT_16BITS(bp+2); + lan_delay = GET_BE_U_2(bp); + override_interval = GET_BE_U_2(bp + 2); t_bit = (lan_delay & 0x8000)? 1 : 0; lan_delay &= ~0x8000; - ND_PRINT((ndo, "\n\t T-bit=%d, LAN delay %dms, Override interval %dms", - t_bit, lan_delay, override_interval)); + ND_PRINT("\n\t T-bit=%u, LAN delay %ums, Override interval %ums", + t_bit, lan_delay, override_interval); } break; @@ -800,36 +806,44 @@ pimv2_print(netdissect_options *ndo, case PIMV2_HELLO_OPTION_DR_PRIORITY: switch (olen) { case 0: - ND_PRINT((ndo, "Bi-Directional Capability (Old)")); + ND_PRINT("Bi-Directional Capability (Old)"); break; case 4: - ND_PRINT((ndo, "%u", EXTRACT_32BITS(bp))); + ND_PRINT("%u", GET_BE_U_4(bp)); break; default: - ND_PRINT((ndo, "ERROR: Option Length != 4 Bytes (%u)", olen)); + ND_PRINT("[option length %u != 4]", olen); + nd_print_invalid(ndo); + return; break; } break; case PIMV2_HELLO_OPTION_GENID: if (olen != 4) { - ND_PRINT((ndo, "ERROR: Option Length != 4 Bytes (%u)", olen)); + ND_PRINT("[option length %u != 4]", olen); + nd_print_invalid(ndo); + return; } else { - ND_PRINT((ndo, "0x%08x", EXTRACT_32BITS(bp))); + ND_PRINT("0x%08x", GET_BE_U_4(bp)); } break; case PIMV2_HELLO_OPTION_REFRESH_CAP: if (olen != 4) { - ND_PRINT((ndo, "ERROR: Option Length != 4 Bytes (%u)", olen)); + ND_PRINT("[option length %u != 4]", olen); + nd_print_invalid(ndo); + return; } else { - ND_PRINT((ndo, "v%d", *bp)); - if (*(bp+1) != 0) { - ND_PRINT((ndo, ", interval ")); - unsigned_relts_print(ndo, *(bp+1)); + ND_PRINT("v%u", GET_U_1(bp)); + if (GET_U_1(bp + 1) != 0) { + ND_PRINT(", interval "); + unsigned_relts_print(ndo, + GET_U_1(bp + 1)); } - if (EXTRACT_16BITS(bp+2) != 0) { - ND_PRINT((ndo, " ?0x%04x?", EXTRACT_16BITS(bp+2))); + if (GET_BE_U_2(bp + 2) != 0) { + ND_PRINT(" ?0x%04x?", + GET_BE_U_2(bp + 2)); } } break; @@ -843,7 +857,7 @@ pimv2_print(netdissect_options *ndo, const u_char *ptr = bp; u_int plen = len; while (ptr < (bp+olen)) { - ND_PRINT((ndo, "\n\t ")); + ND_PRINT("\n\t "); advance = pimv2_addr_print(ndo, ptr, plen, pimv2_unicast, pimv2_addr_len, 0); if (advance < 0) goto trunc; @@ -872,25 +886,23 @@ pimv2_print(netdissect_options *ndo, if (len < 4) goto trunc; - ND_TCHECK2(*bp, PIMV2_REGISTER_FLAG_LEN); + ND_TCHECK_LEN(bp, PIMV2_REGISTER_FLAG_LEN); - ND_PRINT((ndo, ", Flags [ %s ]\n\t", + ND_PRINT(", Flags [ %s ]\n\t", tok2str(pimv2_register_flag_values, "none", - EXTRACT_32BITS(bp)))); + GET_BE_U_4(bp))); bp += 4; len -= 4; /* encapsulated multicast packet */ if (len == 0) goto trunc; ip = (const struct ip *)bp; - ND_TCHECK(ip->ip_vhl); switch (IP_V(ip)) { case 0: /* Null header */ - ND_TCHECK(ip->ip_dst); - ND_PRINT((ndo, "IP-Null-header %s > %s", - ipaddr_string(ndo, &ip->ip_src), - ipaddr_string(ndo, &ip->ip_dst))); + ND_PRINT("IP-Null-header %s > %s", + GET_IPADDR_STRING(ip->ip_src), + GET_IPADDR_STRING(ip->ip_dst)); break; case 4: /* IPv4 */ @@ -902,18 +914,18 @@ pimv2_print(netdissect_options *ndo, break; default: - ND_PRINT((ndo, "IP ver %d", IP_V(ip))); + ND_PRINT("IP ver %u", IP_V(ip)); break; } break; } case PIMV2_TYPE_REGISTER_STOP: - ND_PRINT((ndo, " group=")); + ND_PRINT(" group="); if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) goto trunc; bp += advance; len -= advance; - ND_PRINT((ndo, " source=")); + ND_PRINT(" source="); if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) goto trunc; bp += advance; len -= advance; @@ -964,48 +976,48 @@ pimv2_print(netdissect_options *ndo, uint16_t holdtime; uint16_t njoin; uint16_t nprune; - int i, j; + u_int i, j; - if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/ - ND_PRINT((ndo, ", upstream-neighbor: ")); + if (PIM_TYPE(pim_typever) != 7) { /*not for Graft-ACK*/ + ND_PRINT(", upstream-neighbor: "); if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) goto trunc; bp += advance; len -= advance; } if (len < 4) goto trunc; - ND_TCHECK2(*bp, 4); - ngroup = bp[1]; - holdtime = EXTRACT_16BITS(&bp[2]); - ND_PRINT((ndo, "\n\t %u group(s)", ngroup)); - if (PIM_TYPE(pim->pim_typever) != 7) { /*not for Graft-ACK*/ - ND_PRINT((ndo, ", holdtime: ")); + ND_TCHECK_4(bp); + ngroup = GET_U_1(bp + 1); + holdtime = GET_BE_U_2(bp + 2); + ND_PRINT("\n\t %u group(s)", ngroup); + if (PIM_TYPE(pim_typever) != 7) { /*not for Graft-ACK*/ + ND_PRINT(", holdtime: "); if (holdtime == 0xffff) - ND_PRINT((ndo, "infinite")); + ND_PRINT("infinite"); else unsigned_relts_print(ndo, holdtime); } bp += 4; len -= 4; for (i = 0; i < ngroup; i++) { - ND_PRINT((ndo, "\n\t group #%u: ", i+1)); + ND_PRINT("\n\t group #%u: ", i+1); if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) goto trunc; bp += advance; len -= advance; if (len < 4) goto trunc; - ND_TCHECK2(*bp, 4); - njoin = EXTRACT_16BITS(&bp[0]); - nprune = EXTRACT_16BITS(&bp[2]); - ND_PRINT((ndo, ", joined sources: %u, pruned sources: %u", njoin, nprune)); + ND_TCHECK_4(bp); + njoin = GET_BE_U_2(bp); + nprune = GET_BE_U_2(bp + 2); + ND_PRINT(", joined sources: %u, pruned sources: %u", njoin, nprune); bp += 4; len -= 4; for (j = 0; j < njoin; j++) { - ND_PRINT((ndo, "\n\t joined source #%u: ", j+1)); + ND_PRINT("\n\t joined source #%u: ", j+1); if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_source, pimv2_addr_len, 0)) < 0) goto trunc; bp += advance; len -= advance; } for (j = 0; j < nprune; j++) { - ND_PRINT((ndo, "\n\t pruned source #%u: ", j+1)); + ND_PRINT("\n\t pruned source #%u: ", j+1); if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_source, pimv2_addr_len, 0)) < 0) goto trunc; bp += advance; len -= advance; @@ -1016,28 +1028,26 @@ pimv2_print(netdissect_options *ndo, case PIMV2_TYPE_BOOTSTRAP: { - int i, j, frpcnt; + u_int i, j, frpcnt; /* Fragment Tag, Hash Mask len, and BSR-priority */ if (len < 2) goto trunc; - ND_TCHECK_16BITS(bp); - ND_PRINT((ndo, " tag=%x", EXTRACT_16BITS(bp))); + ND_PRINT(" tag=%x", GET_BE_U_2(bp)); bp += 2; len -= 2; if (len < 1) goto trunc; - ND_TCHECK(bp[0]); - ND_PRINT((ndo, " hashmlen=%d", bp[0])); + ND_PRINT(" hashmlen=%u", GET_U_1(bp)); if (len < 2) goto trunc; - ND_TCHECK(bp[2]); - ND_PRINT((ndo, " BSRprio=%d", bp[1])); + ND_TCHECK_1(bp + 2); + ND_PRINT(" BSRprio=%u", GET_U_1(bp + 1)); bp += 2; len -= 2; /* Encoded-Unicast-BSR-Address */ - ND_PRINT((ndo, " BSR=")); + ND_PRINT(" BSR="); if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) goto trunc; bp += advance; @@ -1045,7 +1055,7 @@ pimv2_print(netdissect_options *ndo, for (i = 0; len > 0; i++) { /* Encoded-Group Address */ - ND_PRINT((ndo, " (group%d: ", i)); + ND_PRINT(" (group%u: ", i); if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) goto trunc; bp += advance; @@ -1054,12 +1064,11 @@ pimv2_print(netdissect_options *ndo, /* RP-Count, Frag RP-Cnt, and rsvd */ if (len < 1) goto trunc; - ND_TCHECK(bp[0]); - ND_PRINT((ndo, " RPcnt=%d", bp[0])); + ND_PRINT(" RPcnt=%u", GET_U_1(bp)); if (len < 2) goto trunc; - ND_TCHECK(bp[1]); - ND_PRINT((ndo, " FRPcnt=%d", frpcnt = bp[1])); + frpcnt = GET_U_1(bp + 1); + ND_PRINT(" FRPcnt=%u", frpcnt); if (len < 4) goto trunc; bp += 4; @@ -1067,7 +1076,7 @@ pimv2_print(netdissect_options *ndo, for (j = 0; j < frpcnt && len > 0; j++) { /* each RP info */ - ND_PRINT((ndo, " RP%d=", j)); + ND_PRINT(" RP%u=", j); if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, @@ -1078,64 +1087,60 @@ pimv2_print(netdissect_options *ndo, if (len < 2) goto trunc; - ND_TCHECK_16BITS(bp); - ND_PRINT((ndo, ",holdtime=")); - unsigned_relts_print(ndo, EXTRACT_16BITS(bp)); + ND_PRINT(",holdtime="); + unsigned_relts_print(ndo, + GET_BE_U_2(bp)); if (len < 3) goto trunc; - ND_TCHECK(bp[2]); - ND_PRINT((ndo, ",prio=%d", bp[2])); + ND_PRINT(",prio=%u", GET_U_1(bp + 2)); if (len < 4) goto trunc; bp += 4; len -= 4; } - ND_PRINT((ndo, ")")); + ND_PRINT(")"); } break; } case PIMV2_TYPE_ASSERT: - ND_PRINT((ndo, " group=")); + ND_PRINT(" group="); if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) goto trunc; bp += advance; len -= advance; - ND_PRINT((ndo, " src=")); + ND_PRINT(" src="); if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) goto trunc; bp += advance; len -= advance; if (len < 8) goto trunc; - ND_TCHECK2(*bp, 8); - if (bp[0] & 0x80) - ND_PRINT((ndo, " RPT")); - ND_PRINT((ndo, " pref=%u", EXTRACT_32BITS(&bp[0]) & 0x7fffffff)); - ND_PRINT((ndo, " metric=%u", EXTRACT_32BITS(&bp[4]))); + ND_TCHECK_8(bp); + if (GET_U_1(bp) & 0x80) + ND_PRINT(" RPT"); + ND_PRINT(" pref=%u", GET_BE_U_4(bp) & 0x7fffffff); + ND_PRINT(" metric=%u", GET_BE_U_4(bp + 4)); break; case PIMV2_TYPE_CANDIDATE_RP: { - int i, pfxcnt; + u_int i, pfxcnt; /* Prefix-Cnt, Priority, and Holdtime */ if (len < 1) goto trunc; - ND_TCHECK(bp[0]); - ND_PRINT((ndo, " prefix-cnt=%d", bp[0])); - pfxcnt = bp[0]; + ND_PRINT(" prefix-cnt=%u", GET_U_1(bp)); + pfxcnt = GET_U_1(bp); if (len < 2) goto trunc; - ND_TCHECK(bp[1]); - ND_PRINT((ndo, " prio=%d", bp[1])); + ND_PRINT(" prio=%u", GET_U_1(bp + 1)); if (len < 4) goto trunc; - ND_TCHECK_16BITS(&bp[2]); - ND_PRINT((ndo, " holdtime=")); - unsigned_relts_print(ndo, EXTRACT_16BITS(&bp[2])); + ND_PRINT(" holdtime="); + unsigned_relts_print(ndo, GET_BE_U_2(bp + 2)); bp += 4; len -= 4; /* Encoded-Unicast-RP-Address */ - ND_PRINT((ndo, " RP=")); + ND_PRINT(" RP="); if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) goto trunc; bp += advance; @@ -1143,7 +1148,7 @@ pimv2_print(netdissect_options *ndo, /* Encoded-Group Addresses */ for (i = 0; i < pfxcnt && len > 0; i++) { - ND_PRINT((ndo, " Group%d=", i)); + ND_PRINT(" Group%u=", i); if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) goto trunc; bp += advance; @@ -1153,43 +1158,77 @@ pimv2_print(netdissect_options *ndo, } case PIMV2_TYPE_PRUNE_REFRESH: - ND_PRINT((ndo, " src=")); + ND_PRINT(" src="); if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) goto trunc; bp += advance; len -= advance; - ND_PRINT((ndo, " grp=")); + ND_PRINT(" grp="); if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_group, pimv2_addr_len, 0)) < 0) goto trunc; bp += advance; len -= advance; - ND_PRINT((ndo, " forwarder=")); + ND_PRINT(" forwarder="); if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) goto trunc; bp += advance; len -= advance; if (len < 2) goto trunc; - ND_TCHECK_16BITS(bp); - ND_PRINT((ndo, " TUNR ")); - unsigned_relts_print(ndo, EXTRACT_16BITS(bp)); + ND_PRINT(" TUNR "); + unsigned_relts_print(ndo, GET_BE_U_2(bp)); break; + case PIMV2_TYPE_DF_ELECTION: + subtype = PIM_SUBTYPE(GET_U_1(pim->pim_rsv)); + ND_PRINT("\n\t %s,", tok2str( pimv2_df_election_flag_values, + "Unknown", subtype) ); + + ND_PRINT(" rpa="); + if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) { + goto trunc; + } + bp += advance; + len -= advance; + ND_PRINT(" sender pref=%u", GET_BE_U_4(bp) ); + ND_PRINT(" sender metric=%u", GET_BE_U_4(bp + 4)); + + bp += 8; + len -= 8; + + switch (subtype) { + case PIMV2_DF_ELECTION_BACKOFF: + case PIMV2_DF_ELECTION_PASS: + ND_PRINT("\n\t %s addr=", PIMV2_DF_ELECTION_PASS_BACKOFF_STR(subtype)); + if ((advance = pimv2_addr_print(ndo, bp, len, pimv2_unicast, pimv2_addr_len, 0)) < 0) { + goto trunc; + } + bp += advance; + len -= advance; + + ND_PRINT(" %s pref=%u", PIMV2_DF_ELECTION_PASS_BACKOFF_STR(subtype), GET_BE_U_4(bp) ); + ND_PRINT(" %s metric=%u", PIMV2_DF_ELECTION_PASS_BACKOFF_STR(subtype), GET_BE_U_4(bp + 4)); + + bp += 8; + len -= 8; + + if (subtype == PIMV2_DF_ELECTION_BACKOFF) { + ND_PRINT(" interval %dms", GET_BE_U_2(bp)); + } + + break; + default: + break; + } + break; default: - ND_PRINT((ndo, " [type %d]", PIM_TYPE(pim->pim_typever))); + ND_PRINT(" [type %u]", PIM_TYPE(pim_typever)); break; } return; trunc: - ND_PRINT((ndo, "[|pim]")); + nd_print_trunc(ndo); } - -/* - * Local Variables: - * c-style: whitesmith - * c-basic-offset: 8 - * End: - */ |