Use more the EXTRACT_U_1() macro (40/n)

[tcpdump] / print-rrcp.c

diff --git a/print-rrcp.c b/print-rrcp.c
index 96a49617aa69157fca31507304180fa6b956c1db..ddacf94c80c180ee03c793e66d36291a49f299ad 100644 (file)
--- a/print-rrcp.c
+++ b/print-rrcp.c
@@ -21,29 +21,36 @@
  * 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
+/* \summary: Realtek Remote Control Protocol (RRCP) printer */
+
+/*
+ * See, for example, section 8.20 "Realtek Remote Control Protocol" of
+ *
+ *    http://realtek.info/pdf/rtl8324.pdf
+ *
+ * and section 7.22 "Realtek Remote Control Protocol" of
+ *
+ *    http://realtek.info/pdf/rtl8326.pdf
+ *
+ * and this page on the OpenRRCP Wiki:
+ *
+ *    http://openrrcp.org.ru/wiki/rrcp_protocol
+ *
+ * NOTE: none of them indicate the byte order of multi-byte fields in any
+ * obvious fashion.
+ */

 
 #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 */
 
 #define RRCP_OPCODE_MASK       0x7F    /* 0x00 = hello, 0x01 = get, 0x02 = set */
 #define RRCP_ISREPLY           0x80    /* 0 = request to switch, 0x80 = reply from switch */
 


@@ -64,80 +71,74 @@ static const char rcsid[] _U_ =
 #define RRCP_CHIP_ID_OFFSET            12      /* 2 bytes */
 #define RRCP_VENDOR_ID_OFFSET          14      /* 4 bytes */
 
 #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
  */
 void
 rrcp_print(netdissect_options *ndo,
          register const u_char *cp,
 /*
  * Print RRCP requests
  */
 void
 rrcp_print(netdissect_options *ndo,
          register const u_char *cp,

-         u_int length _U_)
+         u_int length _U_,
+         const struct lladdr_info *src,
+         const struct lladdr_info *dst)

 {
 {

-       const u_char *rrcp;
-       u_int8_t rrcp_proto;
-       u_int8_t rrcp_opcode;
-       register const struct ether_header *ep;
-       char proto_str[16];
-       char opcode_str[32];
-
-       ep = (const struct ether_header *)cp;
-       rrcp = cp + ETHER_HDRLEN;
+       uint8_t rrcp_proto;
+       uint8_t rrcp_opcode;

 
 

-       ND_TCHECK(*(rrcp + RRCP_PROTO_OFFSET));
-       rrcp_proto = *(rrcp + RRCP_PROTO_OFFSET);
-       if (rrcp_proto==1){
-           strcpy(proto_str,"RRCP");
-       }else if ( rrcp_proto==2 ){
-           strcpy(proto_str,"RRCP-REP");
-       }else{
-           sprintf(proto_str,"RRCP-0x%02d",rrcp_proto);
-       }
-       ND_TCHECK(*(rrcp + RRCP_OPCODE_ISREPLY_OFFSET));
-       rrcp_opcode = (*(rrcp + RRCP_OPCODE_ISREPLY_OFFSET)) & RRCP_OPCODE_MASK;
-       if (rrcp_opcode==0){
-           strcpy(opcode_str,"hello");
-       }else if ( rrcp_opcode==1 ){
-           strcpy(opcode_str,"get");
-       }else if ( rrcp_opcode==2 ){
-           strcpy(opcode_str,"set");
-       }else{
-           sprintf(opcode_str,"unknown opcode (0x%02d)",rrcp_opcode);
+       ND_TCHECK(*(cp + RRCP_PROTO_OFFSET));
+       rrcp_proto = EXTRACT_U_1(cp + RRCP_PROTO_OFFSET);
+       ND_TCHECK(*(cp + RRCP_OPCODE_ISREPLY_OFFSET));
+       rrcp_opcode = EXTRACT_U_1((cp + RRCP_OPCODE_ISREPLY_OFFSET)) & RRCP_OPCODE_MASK;
+       if (src != NULL && dst != NULL) {
+               ND_PRINT((ndo, "%s > %s, ",
+                       (src->addr_string)(ndo, src->addr),
+                       (dst->addr_string)(ndo, dst->addr)));

        }
        }

-        ND_PRINT((ndo, "%s > %s, %s %s",
-               etheraddr_string(ESRC(ep)),
-               etheraddr_string(EDST(ep)),
-               proto_str,
-               ((*(rrcp + RRCP_OPCODE_ISREPLY_OFFSET)) & RRCP_ISREPLY) ? "reply" : "query"));
+       ND_PRINT((ndo, "%s %s",
+               tok2str(proto_values,"RRCP-0x%02x",rrcp_proto),
+               ((EXTRACT_U_1(cp + RRCP_OPCODE_ISREPLY_OFFSET)) & RRCP_ISREPLY) ? "reply" : "query"));

        if (rrcp_proto==1){
        if (rrcp_proto==1){

-           ND_PRINT((ndo, ": %s", opcode_str));
+           ND_PRINT((ndo, ": %s",
+                    tok2str(opcode_values,"unknown opcode (0x%02x)",rrcp_opcode)));

        }
        if (rrcp_opcode==1 || rrcp_opcode==2){
        }
        if (rrcp_opcode==1 || rrcp_opcode==2){

-           ND_TCHECK2(*(rrcp + RRCP_REG_ADDR_OFFSET), 6);
+           ND_TCHECK_6(cp + RRCP_REG_ADDR_OFFSET);

            ND_PRINT((ndo, " addr=0x%04x, data=0x%08x",
            ND_PRINT((ndo, " addr=0x%04x, data=0x%08x",

-                    EXTRACT_16BITS(rrcp + RRCP_REG_ADDR_OFFSET),
-                    EXTRACT_32BITS(rrcp + RRCP_REG_DATA_OFFSET)));
+                    EXTRACT_LE_U_2(cp + RRCP_REG_ADDR_OFFSET),
+                    EXTRACT_LE_U_4(cp + RRCP_REG_DATA_OFFSET)));

        }
        if (rrcp_proto==1){
        }
        if (rrcp_proto==1){

-           ND_TCHECK2(*(rrcp + RRCP_AUTHKEY_OFFSET), 2);
+           ND_TCHECK_2(cp + RRCP_AUTHKEY_OFFSET);

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

-                 EXTRACT_16BITS(rrcp + RRCP_AUTHKEY_OFFSET)));
+                 EXTRACT_BE_U_2(cp + RRCP_AUTHKEY_OFFSET)));

        }
        if (rrcp_proto==1 && rrcp_opcode==0 &&
        }
        if (rrcp_proto==1 && rrcp_opcode==0 &&

-            ((*(rrcp + RRCP_OPCODE_ISREPLY_OFFSET)) & RRCP_ISREPLY)){
-           ND_TCHECK2(*(rrcp + RRCP_VENDOR_ID_OFFSET), 4);
+            ((EXTRACT_U_1(cp + RRCP_OPCODE_ISREPLY_OFFSET)) & RRCP_ISREPLY)){
+           ND_TCHECK_4(cp + RRCP_VENDOR_ID_OFFSET);

            ND_PRINT((ndo, " downlink_port=%d, uplink_port=%d, uplink_mac=%s, vendor_id=%08x ,chip_id=%04x ",
            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(rrcp + RRCP_UPLINK_MAC_OFFSET),
-                    EXTRACT_32BITS(rrcp + RRCP_VENDOR_ID_OFFSET),
-                    EXTRACT_16BITS(rrcp + RRCP_CHIP_ID_OFFSET)));
+                    EXTRACT_U_1(cp + RRCP_DOWNLINK_PORT_OFFSET),
+                    EXTRACT_U_1(cp + RRCP_UPLINK_PORT_OFFSET),
+                    etheraddr_string(ndo, cp + RRCP_UPLINK_MAC_OFFSET),
+                    EXTRACT_BE_U_4(cp + RRCP_VENDOR_ID_OFFSET),
+                    EXTRACT_BE_U_2(cp + RRCP_CHIP_ID_OFFSET)));

        }else if (rrcp_opcode==1 || rrcp_opcode==2 || rrcp_proto==2){
        }else if (rrcp_opcode==1 || rrcp_opcode==2 || rrcp_proto==2){

-           ND_TCHECK2(*(rrcp + RRCP_COOKIE2_OFFSET), 4);
+           ND_TCHECK_4(cp + RRCP_COOKIE2_OFFSET);

            ND_PRINT((ndo, ", cookie=0x%08x%08x ",
            ND_PRINT((ndo, ", cookie=0x%08x%08x ",

-                   EXTRACT_32BITS(rrcp + RRCP_COOKIE2_OFFSET),
-                   EXTRACT_32BITS(rrcp + RRCP_COOKIE1_OFFSET)));
+                   EXTRACT_BE_U_4(cp + RRCP_COOKIE2_OFFSET),
+                   EXTRACT_BE_U_4(cp + RRCP_COOKIE1_OFFSET)));

        }
        }

-        if (!ndo->ndo_vflag)
-            return;

        return;
 
 trunc:
        return;
 
 trunc: