/*
* Copyright (C) 2001 Julian Cowley
* All rights reserved.
- *
+ *
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
- *
+ *
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* SUCH DAMAGE.
*/
-/* Cisco Hot Standby Router Protocol (HSRP). */
+/* \summary: Cisco Hot Standby Router Protocol (HSRP) printer */
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-hsrp.c,v 1.1 2001-09-17 06:22:33 guy Exp $";
-#endif
+/* specification: RFC 2281 for version 1 */
#ifdef HAVE_CONFIG_H
-#include "config.h"
+#include <config.h>
#endif
-#include <sys/types.h>
-
-#include <stdio.h>
-#include <netinet/in.h>
+#include "netdissect-stdinc.h"
-#include "interface.h"
+#include "netdissect.h"
#include "addrtoname.h"
+#include "extract.h"
/* HSRP op code types. */
-static char *op_code_str[] = {
+static const char *op_code_str[] = {
"hello",
"coup",
"resign"
};
/* HSRP states and associated names. */
-static struct {
- u_int value;
- char *str;
-} states[] = {
+static const struct tok states[] = {
{ 0, "initial" },
{ 1, "learn" },
{ 2, "listen" },
{ 4, "speak" },
{ 8, "standby" },
- { 16, "active" }
+ { 16, "active" },
+ { 0, NULL }
};
/*
/* HSRP protocol header. */
struct hsrp {
- u_char hsrp_version;
- u_char hsrp_op_code;
- u_char hsrp_state;
- u_char hsrp_hellotime;
- u_char hsrp_holdtime;
- u_char hsrp_priority;
- u_char hsrp_group;
- u_char hsrp_reserved;
- u_char hsrp_authdata[HSRP_AUTH_SIZE];
- struct in_addr hsrp_virtaddr;
+ nd_uint8_t hsrp_version;
+ nd_uint8_t hsrp_op_code;
+ nd_uint8_t hsrp_state;
+ nd_uint8_t hsrp_hellotime;
+ nd_uint8_t hsrp_holdtime;
+ nd_uint8_t hsrp_priority;
+ nd_uint8_t hsrp_group;
+ nd_uint8_t hsrp_reserved;
+ nd_byte hsrp_authdata[HSRP_AUTH_SIZE];
+ nd_ipv4 hsrp_virtaddr;
};
void
-hsrp_print(register const u_char *bp, register u_int len)
+hsrp_print(netdissect_options *ndo, const u_char *bp, u_int len)
{
- int op_code, state;
- struct hsrp *hp = (struct hsrp *) bp;
- int i;
+ const struct hsrp *hp = (const struct hsrp *) bp;
+ uint8_t version;
- TCHECK(hp->hsrp_version);
- printf("HSRPv%d", hp->hsrp_version);
- if (hp->hsrp_version != 0)
+ ndo->ndo_protocol = "hsrp";
+ version = GET_U_1(hp->hsrp_version);
+ ND_PRINT("HSRPv%u", version);
+ if (version != 0)
return;
- TCHECK(hp->hsrp_op_code);
- printf("-");
- op_code = hp->hsrp_op_code;
- if (op_code < (sizeof(op_code_str) / sizeof(op_code_str[0]))) {
- printf("%s ", op_code_str[op_code]);
- } else {
- printf("unknown (%d) ", op_code);
- }
- printf("%d: ", len);
- TCHECK(hp->hsrp_state);
- state = hp->hsrp_state;
- for (i = 0; i < (sizeof(states) / sizeof(states[0])); i++) {
- if (state == states[i].value)
- break;
- }
- if (i < (sizeof(states) / sizeof(states[0]))) {
- printf("state=%s ", states[i].str);
- } else {
- printf("state=Unknown (%d) ", state);
- }
- TCHECK(hp->hsrp_group);
- printf("group=%d ", hp->hsrp_group);
- TCHECK(hp->hsrp_reserved);
- if (hp->hsrp_reserved != 0) {
- printf("[reserved=%d!] ", hp->hsrp_reserved);
+ ND_PRINT("-");
+ ND_PRINT("%s ",
+ tok2strary(op_code_str, "unknown (%u)", GET_U_1(hp->hsrp_op_code)));
+ ND_PRINT("%u: ", len);
+ ND_PRINT("state=%s ",
+ tok2str(states, "Unknown (%u)", GET_U_1(hp->hsrp_state)));
+ ND_PRINT("group=%u ", GET_U_1(hp->hsrp_group));
+ if (GET_U_1(hp->hsrp_reserved) != 0) {
+ ND_PRINT("[reserved=%u!] ", GET_U_1(hp->hsrp_reserved));
}
- TCHECK2(hp->hsrp_virtaddr, sizeof(hp->hsrp_virtaddr));
- printf("addr=%s", ipaddr_string(&hp->hsrp_virtaddr));
- if (vflag) {
- printf(" hellotime=");
- relts_print(hp->hsrp_hellotime);
- printf(" holdtime=");
- relts_print(hp->hsrp_holdtime);
- printf(" priority=%d", hp->hsrp_priority);
- printf(" auth=\"");
- fn_printn(hp->hsrp_authdata, sizeof(hp->hsrp_authdata), NULL);
- printf("\"");
+ ND_PRINT("addr=%s", GET_IPADDR_STRING(hp->hsrp_virtaddr));
+ if (ndo->ndo_vflag) {
+ ND_PRINT(" hellotime=");
+ unsigned_relts_print(ndo, GET_U_1(hp->hsrp_hellotime));
+ ND_PRINT(" holdtime=");
+ unsigned_relts_print(ndo, GET_U_1(hp->hsrp_holdtime));
+ ND_PRINT(" priority=%u", GET_U_1(hp->hsrp_priority));
+ ND_PRINT(" auth=\"");
+ /*
+ * RFC 2281 Section 5.1 does not specify the encoding of
+ * Authentication Data explicitly, but zero padding can be
+ * inferred from the "recommended default value".
+ */
+ nd_printjnp(ndo, hp->hsrp_authdata, HSRP_AUTH_SIZE);
+ ND_PRINT("\"");
}
- return;
-trunc:
- printf("[|hsrp]");
}
projects / tcpdump / blobdiff