Default to first interface from pcap_findalldevs()

[tcpdump] / print-rrcp.c

diff --git a/print-rrcp.c b/print-rrcp.c
index dfb536ab7196b9d992790f0967b0a3265910da7f..315514752624fc75635c86aaa7edddce1246f685 100644 (file)
--- a/print-rrcp.c
+++ b/print-rrcp.c
@@ -21,56 +21,49 @@
  * and Realtek Echo Protocol (RRCP-REP) packets.
  */
 
  * and Realtek Echo Protocol (RRCP-REP) packets.
  */
 

-#ifndef lint
-static const char rcsid[] _U_ =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-rrcp.c,v 1.2 2008-04-11 17:21:34 gianluca Exp $";
-#endif
-

 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 

-#include <tcpdump-stdinc.h>
-
-#include <stdio.h>
-#include <string.h>
+#include <netdissect-stdinc.h>

 
 #include "netdissect.h"
 #include "addrtoname.h"
 #include "extract.h"
 #include "ether.h"
 
 
 #include "netdissect.h"
 #include "addrtoname.h"
 #include "extract.h"
 #include "ether.h"
 

-#ifndef ETH_ALEN 
-#define ETH_ALEN 6
-#endif
+#define RRCP_OPCODE_MASK       0x7F    /* 0x00 = hello, 0x01 = get, 0x02 = set */
+#define RRCP_ISREPLY           0x80    /* 0 = request to switch, 0x80 = reply from switch */

 
 

-struct rrcp_packet_t
-{
-  u_int16_t rrcp_ethertype;            /* 0x8899 */
-  u_int8_t  rrcp_proto;                        /* must be 0x01         */
-  u_int8_t  rrcp_opcode:7;               /* 0x00 = hello, 0x01 = get, 0x02 = set */
-  u_int8_t  rrcp_isreply:1;              /* 0 = request to switch, 1 = reply from switch */
-  u_int16_t rrcp_authkey;              /* 0x2379 by default */
-  u_int16_t rrcp_reg_addr;             /* register address */
-  u_int32_t rrcp_reg_data;             /* register data */
-  u_int32_t cookie1;
-  u_int32_t cookie2;
-};
+#define RRCP_PROTO_OFFSET              0       /* proto - 1 byte, must be 1 */
+#define RRCP_OPCODE_ISREPLY_OFFSET     1       /* opcode and isreply flag - 1 byte */
+#define RRCP_AUTHKEY_OFFSET            2       /* authorization key - 2 bytes, 0x2379 by default */

 
 

-struct rrcp_helloreply_packet_t
-{
-  u_int16_t rrcp_ethertype;            /* 0x8899 */
-  u_int8_t  rrcp_proto;                        /* must be 0x01         */
-  u_int8_t  rrcp_opcode:7;               /* 0x00 = hello, 0x01 = get, 0x02 = set */
-  u_int8_t  rrcp_isreply:1;              /* 0 = request to switch, 1 = reply from switch */
-  u_int16_t rrcp_authkey;              /* 0x2379 by default */
-  u_int8_t  rrcp_downlink_port;                /*  */
-  u_int8_t  rrcp_uplink_port;          /*  */
-  u_int8_t  rrcp_uplink_mac[ETH_ALEN];   /*  */
-  u_int16_t rrcp_chip_id;              /*  */
-  u_int32_t rrcp_vendor_id;            /*  */
+/* most packets */
+#define RRCP_REG_ADDR_OFFSET           4       /* register address - 2 bytes */
+#define RRCP_REG_DATA_OFFSET           6       /* register data - 4 bytes */
+#define RRCP_COOKIE1_OFFSET            10      /* 4 bytes */
+#define RRCP_COOKIE2_OFFSET            14      /* 4 bytes */
+
+/* hello reply packets */
+#define RRCP_DOWNLINK_PORT_OFFSET      4       /* 1 byte */
+#define RRCP_UPLINK_PORT_OFFSET                5       /* 1 byte */
+#define RRCP_UPLINK_MAC_OFFSET         6       /* 6 byte MAC address */
+#define RRCP_CHIP_ID_OFFSET            12      /* 2 bytes */
+#define RRCP_VENDOR_ID_OFFSET          14      /* 4 bytes */
+
+static const struct tok proto_values[] = {
+       { 1, "RRCP" },
+       { 2, "RRCP-REP" },
+       { 0, NULL }

 };
 
 };
 

+static const struct tok opcode_values[] = {
+       { 0, "hello" },
+       { 1, "get" },
+       { 2, "set" },
+       { 0, NULL }
+};

 
 /*
  * Print RRCP requests
 
 /*
  * Print RRCP requests


@@ -80,58 +73,55 @@ rrcp_print(netdissect_options *ndo,
          register const u_char *cp,
          u_int length _U_)
 {
          register const u_char *cp,
          u_int length _U_)
 {

-       const struct rrcp_packet_t *rrcp;
-       const struct rrcp_helloreply_packet_t *rrcp_hello;
+       const u_char *rrcp;
+       uint8_t rrcp_proto;
+       uint8_t rrcp_opcode;

        register const struct ether_header *ep;
        register const struct ether_header *ep;

-       char proto_str[16];
-       char opcode_str[32];

 
        ep = (const struct ether_header *)cp;
 
        ep = (const struct ether_header *)cp;

-       rrcp = (const struct rrcp_packet_t *)(cp+12);
-       rrcp_hello = (const struct rrcp_helloreply_packet_t *)(cp+12);
+       rrcp = cp + ETHER_HDRLEN;

 
 

-       if (rrcp->rrcp_proto==1){
-           strcpy(proto_str,"RRCP");
-       }else if ( rrcp->rrcp_proto==2 ){
-           strcpy(proto_str,"RRCP-REP");
-       }else{
-           sprintf(proto_str,"RRCP-0x%02d",rrcp->rrcp_proto);
-       }
-       if (rrcp->rrcp_opcode==0){
-           strcpy(opcode_str,"hello");
-       }else if ( rrcp->rrcp_opcode==1 ){
-           strcpy(opcode_str,"get");
-       }else if ( rrcp->rrcp_opcode==2 ){
-           strcpy(opcode_str,"set");
-       }else{
-           sprintf(opcode_str,"unknown opcode (0x%02d)",rrcp->rrcp_opcode);
-       }
+       ND_TCHECK(*(rrcp + RRCP_PROTO_OFFSET));
+       rrcp_proto = *(rrcp + RRCP_PROTO_OFFSET);
+       ND_TCHECK(*(rrcp + RRCP_OPCODE_ISREPLY_OFFSET));
+       rrcp_opcode = (*(rrcp + RRCP_OPCODE_ISREPLY_OFFSET)) & RRCP_OPCODE_MASK;

         ND_PRINT((ndo, "%s > %s, %s %s",
         ND_PRINT((ndo, "%s > %s, %s %s",

-               etheraddr_string(ESRC(ep)),
-               etheraddr_string(EDST(ep)),
-               proto_str, rrcp->rrcp_isreply ? "reply" : "query"));
-       if (rrcp->rrcp_proto==1){
-           ND_PRINT((ndo, ": %s", opcode_str));
+               etheraddr_string(ndo, ESRC(ep)),
+               etheraddr_string(ndo, EDST(ep)),
+               tok2str(proto_values,"RRCP-0x%02x",rrcp_proto),
+               ((*(rrcp + RRCP_OPCODE_ISREPLY_OFFSET)) & RRCP_ISREPLY) ? "reply" : "query"));
+       if (rrcp_proto==1){
+           ND_PRINT((ndo, ": %s",
+                    tok2str(opcode_values,"unknown opcode (0x%02x)",rrcp_opcode)));

        }
        }

-       if (rrcp->rrcp_opcode==1 || rrcp->rrcp_opcode==2){
-           ND_PRINT((ndo, " addr=0x%04x, data=0x%04x",
-                    rrcp->rrcp_reg_addr, rrcp->rrcp_reg_data, rrcp->rrcp_authkey));
+       if (rrcp_opcode==1 || rrcp_opcode==2){
+           ND_TCHECK2(*(rrcp + RRCP_REG_ADDR_OFFSET), 6);
+           ND_PRINT((ndo, " addr=0x%04x, data=0x%08x",
+                     EXTRACT_LE_16BITS(rrcp + RRCP_REG_ADDR_OFFSET),
+                     EXTRACT_LE_32BITS(rrcp + RRCP_REG_DATA_OFFSET)));

        }
        }

-       if (rrcp->rrcp_proto==1){
+       if (rrcp_proto==1){
+           ND_TCHECK2(*(rrcp + RRCP_AUTHKEY_OFFSET), 2);

            ND_PRINT((ndo, ", auth=0x%04x",
            ND_PRINT((ndo, ", auth=0x%04x",

-                 ntohs(rrcp->rrcp_authkey)));
+                 EXTRACT_16BITS(rrcp + RRCP_AUTHKEY_OFFSET)));

        }
        }

-       if (rrcp->rrcp_proto==1 && rrcp->rrcp_opcode==0 && rrcp->rrcp_isreply){
-           ND_PRINT((ndo, " downlink_port=%d, uplink_port=%d, uplink_mac=%s, vendor_id=%08x ,chip_id=%04x ",
-                    rrcp_hello->rrcp_downlink_port,
-                    rrcp_hello->rrcp_uplink_port,
-                    etheraddr_string(rrcp_hello->rrcp_uplink_mac),
-                    rrcp_hello->rrcp_vendor_id,
-                    rrcp_hello->rrcp_chip_id));
-       }else if (rrcp->rrcp_opcode==1 || rrcp->rrcp_opcode==2 || rrcp->rrcp_proto==2){
-       ND_PRINT((ndo, ", cookie=0x%08x%08x ",
-                   rrcp->cookie2, rrcp->cookie1));
+       if (rrcp_proto==1 && rrcp_opcode==0 &&
+            ((*(rrcp + RRCP_OPCODE_ISREPLY_OFFSET)) & RRCP_ISREPLY)){
+           ND_TCHECK2(*(rrcp + RRCP_VENDOR_ID_OFFSET), 4);
+           ND_PRINT((ndo, " downlink_port=%d, uplink_port=%d, uplink_mac=%s, vendor_id=%08x ,chip_id=%04x ",
+                    *(rrcp + RRCP_DOWNLINK_PORT_OFFSET),
+                    *(rrcp + RRCP_UPLINK_PORT_OFFSET),
+                    etheraddr_string(ndo, rrcp + RRCP_UPLINK_MAC_OFFSET),
+                    EXTRACT_32BITS(rrcp + RRCP_VENDOR_ID_OFFSET),
+                    EXTRACT_16BITS(rrcp + RRCP_CHIP_ID_OFFSET)));
+       }else if (rrcp_opcode==1 || rrcp_opcode==2 || rrcp_proto==2){
+           ND_TCHECK2(*(rrcp + RRCP_COOKIE2_OFFSET), 4);
+           ND_PRINT((ndo, ", cookie=0x%08x%08x ",
+                   EXTRACT_32BITS(rrcp + RRCP_COOKIE2_OFFSET),
+                   EXTRACT_32BITS(rrcp + RRCP_COOKIE1_OFFSET)));

        }
        }

-        if (!ndo->ndo_vflag)
-            return;
+       return;
+
+trunc:
+       ND_PRINT((ndo, "[|rrcp]"));

 }
 }