* FOR A PARTICULAR PURPOSE.
*/
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-vrrp.c,v 1.4 2001-07-20 03:16:23 guy Exp $";
-#endif
+/* \summary: Virtual Router Redundancy Protocol (VRRP) printer */
#ifdef HAVE_CONFIG_H
-#include "config.h"
+#include <config.h>
#endif
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-#include <netinet/in.h>
+#include "netdissect-stdinc.h"
-#include "interface.h"
+#include "netdissect.h"
#include "extract.h"
#include "addrtoname.h"
+#include "ip.h"
+#include "ipproto.h"
/*
- * RFC 2338:
+ * RFC 2338 (VRRP v2):
+ *
* 0 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Authentication Data (2) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ *
+ * RFC 5798 (VRRP v3):
+ *
+ * 0 1 2 3
+ * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | IPv4 Fields or IPv6 Fields |
+ * ... ...
+ * | |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |Version| Type | Virtual Rtr ID| Priority |Count IPvX Addr|
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |(rsvd) | Max Adver Int | Checksum |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | |
+ * + +
+ * | IPvX Address(es) |
+ * + +
+ * | |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
/* Type */
#define VRRP_TYPE_ADVERTISEMENT 1
static const struct tok type2str[] = {
- { VRRP_TYPE_ADVERTISEMENT, "advertisement" },
+ { VRRP_TYPE_ADVERTISEMENT, "Advertisement" },
{ 0, NULL }
};
};
void
-vrrp_print(register const u_char *bp, register u_int len, int ttl)
+vrrp_print(netdissect_options *ndo,
+ const u_char *bp, u_int len,
+ const u_char *bp2, int ttl)
{
- int version, type, auth_type;
+ int version, type, auth_type = VRRP_AUTH_NONE; /* keep compiler happy */
const char *type_s;
- TCHECK(bp[0]);
- version = (bp[0] & 0xf0) >> 4;
- type = bp[0] & 0x0f;
- type_s = tok2str(type2str, "type#%d", type);
- printf("VRRPv%d-%s %d: ", version, type_s, len);
+ ndo->ndo_protocol = "vrrp";
+ ND_TCHECK_1(bp);
+ version = (EXTRACT_U_1(bp) & 0xf0) >> 4;
+ type = EXTRACT_U_1(bp) & 0x0f;
+ type_s = tok2str(type2str, "unknown type (%u)", type);
+ ND_PRINT("VRRPv%u, %s", version, type_s);
if (ttl != 255)
- printf("[ttl=%d!] ", ttl);
- if (version != 2 || type != VRRP_TYPE_ADVERTISEMENT)
+ ND_PRINT(", (ttl %u)", ttl);
+ if (version < 2 || version > 3 || type != VRRP_TYPE_ADVERTISEMENT)
return;
- TCHECK(bp[2]);
- printf("vrid=%d prio=%d", bp[1], bp[2]);
- TCHECK(bp[5]);
- auth_type = bp[4];
- printf(" authtype=%s", tok2str(auth2str, NULL, auth_type));
- printf(" intvl=%d", bp[5]);
- if (vflag) {
- int naddrs = bp[3];
- int i;
+ ND_TCHECK_1(bp + 2);
+ ND_PRINT(", vrid %u, prio %u", EXTRACT_U_1(bp + 1), EXTRACT_U_1(bp + 2));
+ ND_TCHECK_1(bp + 5);
+
+ if (version == 2) {
+ auth_type = EXTRACT_U_1(bp + 4);
+ ND_PRINT(", authtype %s", tok2str(auth2str, NULL, auth_type));
+ ND_PRINT(", intvl %us, length %u", EXTRACT_U_1(bp + 5), len);
+ } else { /* version == 3 */
+ uint16_t intvl = (EXTRACT_U_1(bp + 4) & 0x0f) << 8 | EXTRACT_U_1(bp + 5);
+ ND_PRINT(", intvl %ucs, length %u", intvl, len);
+ }
+
+ if (ndo->ndo_vflag) {
+ u_int naddrs = EXTRACT_U_1(bp + 3);
+ u_int i;
char c;
- if (TTEST2(bp[0], len) && in_cksum((const u_short*)bp, len, 0))
- printf(" (bad vrrp cksum %x!)",
- EXTRACT_16BITS(&bp[6]));
- printf(" addrs");
+ if (version == 2 && ND_TTEST_LEN(bp, len)) {
+ struct cksum_vec vec[1];
+
+ vec[0].ptr = bp;
+ vec[0].len = len;
+ if (in_cksum(vec, 1))
+ ND_PRINT(", (bad vrrp cksum %x)",
+ EXTRACT_BE_U_2(bp + 6));
+ }
+
+ if (version == 3 && ND_TTEST_LEN(bp, len)) {
+ uint16_t cksum = nextproto4_cksum(ndo, (const struct ip *)bp2, bp,
+ len, len, IPPROTO_VRRP);
+ if (cksum)
+ ND_PRINT(", (bad vrrp cksum %x)",
+ EXTRACT_BE_U_2(bp + 6));
+ }
+
+ ND_PRINT(", addrs");
if (naddrs > 1)
- printf("(%d)", naddrs);
- printf(":");
+ ND_PRINT("(%u)", naddrs);
+ ND_PRINT(":");
c = ' ';
bp += 8;
for (i = 0; i < naddrs; i++) {
- TCHECK(bp[3]);
- printf("%c%s", c, ipaddr_string(bp));
+ ND_TCHECK_1(bp + 3);
+ ND_PRINT("%c%s", c, ipaddr_string(ndo, bp));
c = ',';
bp += 4;
}
- if (auth_type == VRRP_AUTH_SIMPLE) { /* simple text password */
- TCHECK(bp[7]);
- printf(" auth \"");
- fn_printn(bp, bp[7] - bp[0] + 1, NULL);
- printf("\"");
+ if (version == 2 && auth_type == VRRP_AUTH_SIMPLE) { /* simple text password */
+ ND_TCHECK_1(bp + 7);
+ ND_PRINT(" auth \"");
+ if (nd_printn(ndo, bp, 8, ndo->ndo_snapend)) {
+ ND_PRINT("\"");
+ goto trunc;
+ }
+ ND_PRINT("\"");
}
}
return;
trunc:
- printf("[|vrrp]");
+ nd_print_trunc(ndo);
}
projects / tcpdump / blobdiff