TCP: Add a test with data in the RST segment

[tcpdump] / print-hsrp.c

diff --git a/print-hsrp.c b/print-hsrp.c
index fbcf5834ac1a031119bee891a5bb783cd4fed510..3027826847a9c84fe9a4df9e22c29ed2ba2b1b8e 100644 (file)
--- a/print-hsrp.c
+++ b/print-hsrp.c
@@ -27,18 +27,19 @@
  * SUCH DAMAGE.
  */
 
-/* Cisco Hot Standby Router Protocol (HSRP). */
+/* \summary: Cisco Hot Standby Router Protocol (HSRP) printer */
+
+/* specification: RFC 2281 for version 1 */
 
 #ifdef HAVE_CONFIG_H
-#include "config.h"
+#include <config.h>
 #endif
 
-#include <tcpdump-stdinc.h>
-
-#include <stdio.h>
+#include "netdissect-stdinc.h"
 
-#include "interface.h"
+#include "netdissect.h"
 #include "addrtoname.h"
+#include "extract.h"
 
 /* HSRP op code types. */
 static const char *op_code_str[] = {
@@ -80,56 +81,53 @@ static const struct tok states[] = {
 
 /* HSRP protocol header. */
 struct hsrp {
-       u_int8_t        hsrp_version;
-       u_int8_t        hsrp_op_code;
-       u_int8_t        hsrp_state;
-       u_int8_t        hsrp_hellotime;
-       u_int8_t        hsrp_holdtime;
-       u_int8_t        hsrp_priority;
-       u_int8_t        hsrp_group;
-       u_int8_t        hsrp_reserved;
-       u_int8_t        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_int8_t *bp, register u_int len)
+hsrp_print(netdissect_options *ndo, const u_char *bp, u_int len)
 {
-       struct hsrp *hp = (struct hsrp *) bp;
+       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("-");
-       printf("%s ", tok2strary(op_code_str, "unknown (%d)", hp->hsrp_op_code));
-       printf("%d: ", len);
-       TCHECK(hp->hsrp_state);
-       printf("state=%s ", tok2str(states, "Unknown (%d)", hp->hsrp_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));
        }
-       TCHECK(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=\"");
-               if (fn_printn(hp->hsrp_authdata, sizeof(hp->hsrp_authdata),
-                   snapend)) {
-                       printf("\"");
-                       goto trunc;
-               }
-               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]");
 }