* 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"
+#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"
-#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
*/
void
rrcp_print(netdissect_options *ndo,
- register const u_char *cp,
- u_int length _U_)
+ const u_char *cp,
+ u_int length _U_,
+ const struct lladdr_info *src,
+ const struct lladdr_info *dst)
{
- const struct rrcp_packet_t *rrcp;
- const struct rrcp_helloreply_packet_t *rrcp_hello;
- register const struct ether_header *ep;
- char proto_str[16];
- char opcode_str[32];
+ uint8_t rrcp_proto;
+ uint8_t rrcp_opcode;
- ep = (const struct ether_header *)cp;
- rrcp = (const struct rrcp_packet_t *)(cp+12);
- rrcp_hello = (const struct rrcp_helloreply_packet_t *)(cp+12);
-
- 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);
+ ndo->ndo_protocol = "rrcp";
+ rrcp_proto = GET_U_1(cp + RRCP_PROTO_OFFSET);
+ rrcp_opcode = GET_U_1((cp + RRCP_OPCODE_ISREPLY_OFFSET)) & RRCP_OPCODE_MASK;
+ if (src != NULL && dst != NULL) {
+ ND_PRINT("%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_isreply ? "reply" : "query"));
- if (rrcp->rrcp_proto==1){
- ND_PRINT((ndo, ": %s", opcode_str));
+ ND_PRINT("%s %s",
+ tok2str(proto_values,"RRCP-0x%02x",rrcp_proto),
+ ((GET_U_1(cp + RRCP_OPCODE_ISREPLY_OFFSET)) & RRCP_ISREPLY) ? "reply" : "query");
+ if (rrcp_proto==1){
+ ND_PRINT(": %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_PRINT(" addr=0x%04x, data=0x%08x",
+ GET_LE_U_2(cp + RRCP_REG_ADDR_OFFSET),
+ GET_LE_U_4(cp + RRCP_REG_DATA_OFFSET));
}
- if (rrcp->rrcp_proto==1){
- ND_PRINT((ndo, ", auth=0x%04x",
- ntohs(rrcp->rrcp_authkey)));
+ if (rrcp_proto==1){
+ ND_PRINT(", auth=0x%04x",
+ GET_BE_U_2(cp + 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 &&
+ ((GET_U_1(cp + RRCP_OPCODE_ISREPLY_OFFSET)) & RRCP_ISREPLY)){
+ ND_PRINT(" downlink_port=%u, uplink_port=%u, uplink_mac=%s, vendor_id=%08x ,chip_id=%04x ",
+ GET_U_1(cp + RRCP_DOWNLINK_PORT_OFFSET),
+ GET_U_1(cp + RRCP_UPLINK_PORT_OFFSET),
+ GET_ETHERADDR_STRING(cp + RRCP_UPLINK_MAC_OFFSET),
+ GET_BE_U_4(cp + RRCP_VENDOR_ID_OFFSET),
+ GET_BE_U_2(cp + RRCP_CHIP_ID_OFFSET));
+ }else if (rrcp_opcode==1 || rrcp_opcode==2 || rrcp_proto==2){
+ ND_PRINT(", cookie=0x%08x%08x ",
+ GET_BE_U_4(cp + RRCP_COOKIE2_OFFSET),
+ GET_BE_U_4(cp + RRCP_COOKIE1_OFFSET));
}
- if (!ndo->ndo_vflag)
- return;
}
projects / tcpdump / blobdiff