/* \summary: Protocol Independent Multicast (PIM) printer */
-#ifdef HAVE_CONFIG_H
#include <config.h>
-#endif
#include "netdissect-stdinc.h"
#include "ip.h"
#include "ip6.h"
#include "ipproto.h"
+#include "af.h"
#define PIMV1_TYPE_QUERY 0
#define PIMV1_TYPE_REGISTER 1
{ 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 {
*/
#define PIM_VER(x) (((x) & 0xf0) >> 4)
#define PIM_TYPE(x) ((x) & 0x0f)
- nd_uint8_t pim_rsv; /* Reserved in v1, address length in v2 */
+ 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 */
};
((njoin = GET_BE_U_2(bp + 20)) + GET_BE_U_2(bp + 22)) == 1) {
u_int hold;
- ND_PRINT(" RPF %s ", ipaddr_string(ndo, bp));
+ ND_PRINT(" RPF %s ", GET_IPADDR_STRING(bp));
hold = GET_BE_U_2(bp + 6);
if (hold != 180) {
ND_PRINT("Hold ");
unsigned_relts_print(ndo, hold);
}
ND_PRINT("%s (%s/%u, %s", njoin ? "Join" : "Prune",
- ipaddr_string(ndo, bp + 26), GET_U_1(bp + 25) & 0x3f,
- ipaddr_string(ndo, bp + 12));
+ 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", ipaddr_string(ndo, bp + 16));
+ 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" : "",
if (len < sizeof(nd_ipv4))
goto trunc;
- ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
if (ndo->ndo_vflag > 1)
ND_PRINT("\n");
- ND_PRINT(" Upstream Nbr: %s", ipaddr_string(ndo, bp));
+ ND_PRINT(" Upstream Nbr: %s", GET_IPADDR_STRING(bp));
bp += 4;
len -= 4;
if (len < 4)
goto trunc;
- ND_TCHECK_2(bp + 2);
if (ndo->ndo_vflag > 1)
ND_PRINT("\n");
ND_PRINT(" Hold time: ");
if (len < 4)
goto trunc;
- ND_TCHECK_4(bp);
ngroups = GET_U_1(bp + 3);
bp += 4;
len -= 4;
*/
if (len < 4)
goto trunc;
- ND_TCHECK_LEN(bp, sizeof(nd_ipv4));
- ND_PRINT("\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_TCHECK_LEN(bp, sizeof(nd_ipv4));
if (GET_BE_U_4(bp) != 0xffffffff)
- ND_PRINT("/%s", ipaddr_string(ndo, bp));
+ ND_PRINT("/%s", GET_IPADDR_STRING(bp));
bp += 4;
len -= 4;
if (len < 4)
goto trunc;
- ND_TCHECK_4(bp);
njoin = GET_BE_U_2(bp);
nprune = GET_BE_U_2(bp + 2);
ND_PRINT(" joined: %u pruned: %u", njoin, nprune);
type = "Prune";
if (len < 6)
goto trunc;
- ND_TCHECK_6(bp);
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 ",
- ipaddr_string(ndo, bp + 2),
+ GET_IPADDR_STRING(bp + 2),
GET_U_1(bp + 1) & 0x3f);
bp += 6;
len -= 6;
return;
trunc:
nd_print_trunc(ndo);
- return;
}
void
u_char type;
ndo->ndo_protocol = "pimv1";
- ND_TCHECK_1(bp + 1);
type = GET_U_1(bp + 1);
ND_PRINT(" %s", tok2str(pimv1_type_str, "[type %u]", type));
}
}
if (ndo->ndo_vflag) {
- ND_TCHECK_2(bp + 10);
ND_PRINT(" (Hold-time ");
unsigned_relts_print(ndo, GET_BE_U_2(bp + 10));
ND_PRINT(")");
case PIMV1_TYPE_REGISTER:
ND_TCHECK_LEN(bp + 8, 20); /* ip header */
- ND_PRINT(" for %s > %s", ipaddr_string(ndo, bp + 20),
- ipaddr_string(ndo, bp + 24));
+ ND_PRINT(" for %s > %s", GET_IPADDR_STRING(bp + 20),
+ GET_IPADDR_STRING(bp + 24));
break;
case PIMV1_TYPE_REGISTER_STOP:
- ND_TCHECK_LEN(bp + 12, sizeof(nd_ipv4));
- ND_PRINT(" 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_TCHECK_2(bp + 22);
- ND_PRINT(" group %s", ipaddr_string(ndo, bp + 8));
+ ND_PRINT(" group %s", GET_IPADDR_STRING(bp + 8));
if (GET_BE_U_4(bp + 12) != 0xffffffff)
- ND_PRINT("/%s", ipaddr_string(ndo, bp + 12));
- ND_PRINT(" RP %s hold ", ipaddr_string(ndo, bp + 16));
+ 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_TCHECK_LEN(bp + 16, sizeof(nd_ipv4));
- ND_PRINT(" for %s > %s", ipaddr_string(ndo, bp + 16),
- ipaddr_string(ndo, bp + 8));
+ 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", ipaddr_string(ndo, bp + 12));
- ND_TCHECK_4(bp + 24);
+ 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,
}
break;
}
- ND_TCHECK_1(bp + 4);
if ((GET_U_1(bp + 4) >> 4) != 1)
ND_PRINT(" [v%u]", GET_U_1(bp + 4) >> 4);
return;
trunc:
nd_print_trunc(ndo);
- return;
}
/*
ndo->ndo_protocol = "cisco_autorp";
if (len < 8)
goto trunc;
- ND_TCHECK_1(bp);
ND_PRINT(" auto-rp ");
type = GET_U_1(bp);
switch (type) {
break;
}
- ND_TCHECK_1(bp + 1);
numrps = GET_U_1(bp + 1);
- ND_TCHECK_2(bp + 2);
ND_PRINT(" Hold ");
hold = GET_BE_U_2(bp + 2);
if (hold)
if (len < 4)
goto trunc;
- ND_TCHECK_4(bp);
- ND_PRINT(" 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_1(bp);
switch (GET_U_1(bp) & 0x3) {
case 0: ND_PRINT(" PIMv?");
break;
len -= 1;
if (len < 1)
goto trunc;
- ND_TCHECK_1(bp);
nentries = GET_U_1(bp);
bp += 1;
len -= 1;
while (nentries != 0) {
if (len < 6)
goto trunc;
- ND_TCHECK_6(bp);
ND_PRINT("%c%s%s/%u", s, GET_U_1(bp) & 1 ? "!" : "",
- ipaddr_string(ndo, bp + 2), GET_U_1(bp + 1));
+ GET_IPADDR_STRING(bp + 2), GET_U_1(bp + 1));
if (GET_U_1(bp) & 0x02) {
ND_PRINT(" bidir");
}
trunc:
nd_print_trunc(ndo);
- return;
}
void
uint8_t pim_typever;
ndo->ndo_protocol = "pim";
-#ifdef notyet /* currently we see only version and type */
- ND_TCHECK_1(pim->pim_rsv);
-#endif
- ND_TCHECK_1(pim->pim_typever);
pim_typever = GET_U_1(pim->pim_typever);
switch (PIM_VER(pim_typever)) {
case 2:
len);
break;
}
- return;
-
-trunc:
- nd_print_trunc(ndo);
- return;
}
/*
if (addr_len == 0) {
if (len < 2)
goto trunc;
- ND_TCHECK_1(bp + 1);
- switch (GET_U_1(bp)) {
- case 1:
- af = AF_INET;
+ af = GET_U_1(bp);
+ switch (af) {
+ case AFNUM_IP:
addr_len = (u_int)sizeof(nd_ipv4);
break;
- case 2:
- af = AF_INET6;
+ case AFNUM_IP6:
addr_len = (u_int)sizeof(nd_ipv6);
break;
default:
} else {
switch (addr_len) {
case sizeof(nd_ipv4):
- af = AF_INET;
+ af = AFNUM_IP;
break;
case sizeof(nd_ipv6):
- af = AF_INET6;
+ af = AFNUM_IP6;
break;
default:
return -1;
- break;
}
hdrlen = 0;
}
if (len < addr_len)
goto trunc;
ND_TCHECK_LEN(bp, addr_len);
- if (af == AF_INET) {
+ if (af == AFNUM_IP) {
if (!silent)
- ND_PRINT("%s", ipaddr_string(ndo, bp));
- }
- else if (af == AF_INET6) {
+ ND_PRINT("%s", GET_IPADDR_STRING(bp));
+ } else if (af == AFNUM_IP6) {
if (!silent)
- ND_PRINT("%s", ip6addr_string(ndo, bp));
+ ND_PRINT("%s", GET_IP6ADDR_STRING(bp));
}
return hdrlen + addr_len;
case pimv2_group:
if (len < addr_len + 2)
goto trunc;
ND_TCHECK_LEN(bp, addr_len + 2);
- if (af == AF_INET) {
+ if (af == AFNUM_IP) {
if (!silent) {
- ND_PRINT("%s", ipaddr_string(ndo, bp + 2));
+ 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) {
+ } else if (af == AFNUM_IP6) {
if (!silent) {
- ND_PRINT("%s", ip6addr_string(ndo, bp + 2));
+ ND_PRINT("%s", GET_IP6ADDR_STRING(bp + 2));
if (GET_U_1(bp + 1) != 128)
ND_PRINT("/%u", GET_U_1(bp + 1));
}
{
const struct pim *pim = (const struct pim *)bp;
int advance;
+ int subtype;
enum checksum_status cksum_status;
u_int pim_typever;
u_int pimv2_addr_len;
ndo->ndo_protocol = "pimv2";
- if (len < 2)
- goto trunc;
- ND_TCHECK_1(pim->pim_rsv);
+ if (len < 2) {
+ ND_PRINT("[length %u < 2]", len);
+ nd_print_invalid(ndo);
+ return;
+ }
pim_typever = GET_U_1(pim->pim_typever);
- pimv2_addr_len = GET_U_1(pim->pim_rsv);
+ /* 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(", RFC2117-encoding");
- if (len < 4)
- goto trunc;
- ND_TCHECK_2(pim->pim_cksum);
+ 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)");
case PIMV2_TYPE_HELLO:
{
uint16_t otype, olen;
- while (len > 0) {
+ while (len != 0) {
if (len < 4)
goto trunc;
- ND_TCHECK_4(bp);
otype = GET_BE_U_2(bp);
olen = GET_BE_U_2(bp + 2);
ND_PRINT("\n\t %s Option (%u), length %u, Value: ",
switch (otype) {
case PIMV2_HELLO_OPTION_HOLDTIME:
if (olen != 2) {
- ND_PRINT("ERROR: Option Length != 2 Bytes (%u)", olen);
+ ND_PRINT("[option length %u != 2]", olen);
+ nd_print_invalid(ndo);
+ return;
} else {
unsigned_relts_print(ndo,
GET_BE_U_2(bp));
case PIMV2_HELLO_OPTION_LANPRUNEDELAY:
if (olen != 4) {
- ND_PRINT("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;
ND_PRINT("%u", GET_BE_U_4(bp));
break;
default:
- ND_PRINT("ERROR: Option Length != 4 Bytes (%u)", olen);
- break;
+ ND_PRINT("[option length %u != 4]", olen);
+ nd_print_invalid(ndo);
+ return;
}
break;
case PIMV2_HELLO_OPTION_GENID:
if (olen != 4) {
- ND_PRINT("ERROR: Option Length != 4 Bytes (%u)", olen);
+ ND_PRINT("[option length %u != 4]", olen);
+ nd_print_invalid(ndo);
+ return;
} else {
ND_PRINT("0x%08x", GET_BE_U_4(bp));
}
case PIMV2_HELLO_OPTION_REFRESH_CAP:
if (olen != 4) {
- ND_PRINT("ERROR: Option Length != 4 Bytes (%u)", olen);
+ ND_PRINT("[option length %u != 4]", olen);
+ nd_print_invalid(ndo);
+ return;
} else {
ND_PRINT("v%u", GET_U_1(bp));
if (GET_U_1(bp + 1) != 0) {
if (len == 0)
goto trunc;
ip = (const struct ip *)bp;
- ND_TCHECK_1(ip->ip_vhl);
switch (IP_V(ip)) {
case 0: /* Null header */
- ND_TCHECK_4(ip->ip_dst);
ND_PRINT("IP-Null-header %s > %s",
- ipaddr_string(ndo, ip->ip_src),
- ipaddr_string(ndo, ip->ip_dst));
+ GET_IPADDR_STRING(ip->ip_src),
+ GET_IPADDR_STRING(ip->ip_dst));
break;
case 4: /* IPv4 */
/* Fragment Tag, Hash Mask len, and BSR-priority */
if (len < 2)
goto trunc;
- ND_TCHECK_2(bp);
ND_PRINT(" tag=%x", GET_BE_U_2(bp));
bp += 2;
len -= 2;
if (len < 1)
goto trunc;
- ND_TCHECK_1(bp);
ND_PRINT(" hashmlen=%u", GET_U_1(bp));
if (len < 2)
goto trunc;
/* RP-Count, Frag RP-Cnt, and rsvd */
if (len < 1)
goto trunc;
- ND_TCHECK_1(bp);
ND_PRINT(" RPcnt=%u", GET_U_1(bp));
if (len < 2)
goto trunc;
- ND_TCHECK_1(bp + 1);
frpcnt = GET_U_1(bp + 1);
ND_PRINT(" FRPcnt=%u", frpcnt);
if (len < 4)
if (len < 2)
goto trunc;
- ND_TCHECK_2(bp);
ND_PRINT(",holdtime=");
unsigned_relts_print(ndo,
GET_BE_U_2(bp));
if (len < 3)
goto trunc;
- ND_TCHECK_1(bp + 2);
ND_PRINT(",prio=%u", GET_U_1(bp + 2));
if (len < 4)
goto trunc;
/* Prefix-Cnt, Priority, and Holdtime */
if (len < 1)
goto trunc;
- ND_TCHECK_1(bp);
ND_PRINT(" prefix-cnt=%u", GET_U_1(bp));
pfxcnt = GET_U_1(bp);
if (len < 2)
goto trunc;
- ND_TCHECK_1(bp + 1);
ND_PRINT(" prio=%u", GET_U_1(bp + 1));
if (len < 4)
goto trunc;
- ND_TCHECK_2(bp + 2);
ND_PRINT(" holdtime=");
unsigned_relts_print(ndo, GET_BE_U_2(bp + 2));
bp += 4;
len -= advance;
if (len < 2)
goto trunc;
- ND_TCHECK_2(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(" [type %u]", PIM_TYPE(pim_typever));
projects / tcpdump / blobdiff