-/*
- * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that: (1) source code distributions
- * retain the above copyright notice and this paragraph in its entirety, (2)
- * distributions including binary code include the above copyright notice and
- * this paragraph in its entirety in the documentation or other materials
- * provided with the distribution, and (3) all advertising materials mentioning
- * features or use of this software display the following acknowledgement:
- * ``This product includes software developed by the University of California,
- * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
- * the University nor the names of its contributors may be used to endorse
- * or promote products derived from this software without specific prior
- * written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
-/* \summary: Marvell Extended Distributed Switch Architecture (MEDSA) printer */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include "netdissect-stdinc.h"
-
-#include "netdissect.h"
-#include "ethertype.h"
-#include "addrtoname.h"
-#include "extract.h"
-
-
-/*
- * Marvell Extended Distributed Switch Archiecture.
- *
- * A Marvell proprietary header used for passing packets to/from
- * specific ports of a switch. There is no open specification of this
- * header, but is documented in the Marvell Switch data sheets. For
- * background, see:
- *
- * https://lwn.net/Articles/302333/
- */
-struct medsa_pkthdr {
- nd_byte reserved[2];
- nd_uint8_t tag_flags_dev;
- nd_uint8_t port_trunc_codehi_cfi;
- nd_uint8_t pri_vidhi_codelo;
- nd_uint8_t vidlo;
- nd_uint16_t ether_type;
-};
-
-/* Bytes 0 and 1 are reserved and should contain 0 */
-#define TAG(medsa) (GET_U_1(medsa->tag_flags_dev) >> 6)
-#define TAG_TO_CPU 0
-#define TAG_FROM_CPU 1
-#define TAG_FORWARD 3
-#define SRC_TAG(medsa) ((GET_U_1(medsa->tag_flags_dev) >> 5) & 0x01)
-#define SRC_DEV(medsa) (GET_U_1(medsa->tag_flags_dev) & 0x1f)
-#define SRC_PORT(medsa) ((GET_U_1(medsa->port_trunc_codehi_cfi) >> 3) & 0x01f)
-#define TRUNK(medsa) ((GET_U_1(medsa->port_trunc_codehi_cfi) >> 2) & 0x01)
-#define CODE(medsa) ((GET_U_1(medsa->port_trunc_codehi_cfi) & 0x06) | \
- ((GET_U_1(medsa->pri_vidhi_codelo) >> 4) & 0x01))
-#define CODE_BDPU 0
-#define CODE_IGMP_MLD 2
-#define CODE_ARP_MIRROR 4
-#define CFI(medsa) (GET_U_1(medsa->port_trunc_codehi_cfi) & 0x01)
-#define PRI(medsa) (GET_U_1(medsa->pri_vidhi_codelo) >> 5)
-#define VID(medsa) ((u_short)(GET_U_1(medsa->pri_vidhi_codelo) & 0xf) << 8 | \
- GET_U_1(medsa->vidlo))
-
-static const struct tok tag_values[] = {
- { TAG_TO_CPU, "To_CPU" },
- { TAG_FROM_CPU, "From_CPU" },
- { TAG_FORWARD, "Forward" },
- { 0, NULL },
-};
-
-static const struct tok code_values[] = {
- { CODE_BDPU, "BDPU" },
- { CODE_IGMP_MLD, "IGMP/MLD" },
- { CODE_ARP_MIRROR, "APR_Mirror" },
- { 0, NULL },
-};
-
-static void
-medsa_print_full(netdissect_options *ndo,
- const struct medsa_pkthdr *medsa,
- u_int caplen)
-{
- u_char tag = TAG(medsa);
-
- ND_PRINT("%s",
- tok2str(tag_values, "Unknown (%u)", tag));
-
- switch (tag) {
- case TAG_TO_CPU:
- ND_PRINT(", %stagged", SRC_TAG(medsa) ? "" : "un");
- ND_PRINT(", dev.port:vlan %u.%u:%u",
- SRC_DEV(medsa), SRC_PORT(medsa), VID(medsa));
-
- ND_PRINT(", %s",
- tok2str(code_values, "Unknown (%u)", CODE(medsa)));
- if (CFI(medsa))
- ND_PRINT(", CFI");
-
- ND_PRINT(", pri %u: ", PRI(medsa));
- break;
- case TAG_FROM_CPU:
- ND_PRINT(", %stagged", SRC_TAG(medsa) ? "" : "un");
- ND_PRINT(", dev.port:vlan %u.%u:%u",
- SRC_DEV(medsa), SRC_PORT(medsa), VID(medsa));
-
- if (CFI(medsa))
- ND_PRINT(", CFI");
-
- ND_PRINT(", pri %u: ", PRI(medsa));
- break;
- case TAG_FORWARD:
- ND_PRINT(", %stagged", SRC_TAG(medsa) ? "" : "un");
- if (TRUNK(medsa))
- ND_PRINT(", dev.trunk:vlan %u.%u:%u",
- SRC_DEV(medsa), SRC_PORT(medsa), VID(medsa));
- else
- ND_PRINT(", dev.port:vlan %u.%u:%u",
- SRC_DEV(medsa), SRC_PORT(medsa), VID(medsa));
-
- if (CFI(medsa))
- ND_PRINT(", CFI");
-
- ND_PRINT(", pri %u: ", PRI(medsa));
- break;
- default:
- ND_DEFAULTPRINT((const u_char *)medsa, caplen);
- return;
- }
-}
-
-void
-medsa_print(netdissect_options *ndo,
- const u_char *bp, u_int length, u_int caplen,
- const struct lladdr_info *src, const struct lladdr_info *dst)
-{
- const struct medsa_pkthdr *medsa;
- u_short ether_type;
-
- ndo->ndo_protocol = "medsa";
- medsa = (const struct medsa_pkthdr *)bp;
- ND_TCHECK_SIZE(medsa);
-
- if (!ndo->ndo_eflag)
- ND_PRINT("MEDSA %u.%u:%u: ",
- SRC_DEV(medsa), SRC_PORT(medsa), VID(medsa));
- else
- medsa_print_full(ndo, medsa, caplen);
-
- bp += 8;
- length -= 8;
- caplen -= 8;
-
- ether_type = GET_BE_U_2(medsa->ether_type);
- if (ether_type <= MAX_ETHERNET_LENGTH_VAL) {
- /* Try to print the LLC-layer header & higher layers */
- if (llc_print(ndo, bp, length, caplen, src, dst) < 0) {
- /* packet type not known, print raw packet */
- if (!ndo->ndo_suppress_default_print)
- ND_DEFAULTPRINT(bp, caplen);
- }
- } else {
- if (ndo->ndo_eflag)
- ND_PRINT("ethertype %s (0x%04x) ",
- tok2str(ethertype_values, "Unknown",
- ether_type),
- ether_type);
- if (ethertype_print(ndo, ether_type, bp, length, caplen, src, dst) == 0) {
- /* ether_type not known, print raw packet */
- if (!ndo->ndo_eflag)
- ND_PRINT("ethertype %s (0x%04x) ",
- tok2str(ethertype_values, "Unknown",
- ether_type),
- ether_type);
-
- if (!ndo->ndo_suppress_default_print)
- ND_DEFAULTPRINT(bp, caplen);
- }
- }
- return;
-trunc:
- nd_print_trunc(ndo);
-}
projects / tcpdump / commitdiff
