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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 17:13:01 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 17:13:01 +0000 |
commit | 7adcb5b605cc1328a3084c334f4697ec9771936c (patch) | |
tree | 03e681bfda053978ba896745828e09cb056ad156 /print-brcmtag.c | |
parent | Initial commit. (diff) | |
download | tcpdump-upstream.tar.xz tcpdump-upstream.zip |
Adding upstream version 4.99.4.upstream/4.99.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'print-brcmtag.c')
-rw-r--r-- | print-brcmtag.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/print-brcmtag.c b/print-brcmtag.c new file mode 100644 index 0000000..efc6a1e --- /dev/null +++ b/print-brcmtag.c @@ -0,0 +1,151 @@ +/* + * 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: Broadcom Ethernet switches tag (4 bytes) printer */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "netdissect-stdinc.h" + +#define ND_LONGJMP_FROM_TCHECK +#include "netdissect.h" +#include "ethertype.h" +#include "addrtoname.h" +#include "extract.h" + +#define ETHER_TYPE_LEN 2 + +#define BRCM_TAG_LEN 4 +#define BRCM_OPCODE_SHIFT 5 +#define BRCM_OPCODE_MASK 0x7 + +/* Ingress fields */ +#define BRCM_IG_TC_SHIFT 2 +#define BRCM_IG_TC_MASK 0x7 +#define BRCM_IG_TE_MASK 0x3 +#define BRCM_IG_TS_SHIFT 7 +#define BRCM_IG_DSTMAP_MASK 0x1ff + +/* Egress fields */ +#define BRCM_EG_CID_MASK 0xff +#define BRCM_EG_RC_MASK 0xff +#define BRCM_EG_RC_RSVD (3 << 6) +#define BRCM_EG_RC_EXCEPTION (1 << 5) +#define BRCM_EG_RC_PROT_SNOOP (1 << 4) +#define BRCM_EG_RC_PROT_TERM (1 << 3) +#define BRCM_EG_RC_SWITCH (1 << 2) +#define BRCM_EG_RC_MAC_LEARN (1 << 1) +#define BRCM_EG_RC_MIRROR (1 << 0) +#define BRCM_EG_TC_SHIFT 5 +#define BRCM_EG_TC_MASK 0x7 +#define BRCM_EG_PID_MASK 0x1f + +static const struct tok brcm_tag_te_values[] = { + { 0, "None" }, + { 1, "Untag" }, + { 2, "Header"}, + { 3, "Reserved" }, + { 0, NULL } +}; + +static const struct tok brcm_tag_rc_values[] = { + { 1, "mirror" }, + { 2, "MAC learning" }, + { 4, "switching" }, + { 8, "prot term" }, + { 16, "prot snoop" }, + { 32, "exception" }, + { 0, NULL } +}; + +static void +brcm_tag_print(netdissect_options *ndo, const u_char *bp) +{ + uint8_t tag[BRCM_TAG_LEN]; + uint16_t dst_map; + unsigned int i; + + for (i = 0; i < BRCM_TAG_LEN; i++) + tag[i] = GET_U_1(bp + i); + + ND_PRINT("BRCM tag OP: %s", tag[0] ? "IG" : "EG"); + if (tag[0] & (1 << BRCM_OPCODE_SHIFT)) { + /* Ingress Broadcom tag */ + ND_PRINT(", TC: %d", (tag[1] >> BRCM_IG_TC_SHIFT) & + BRCM_IG_TC_MASK); + ND_PRINT(", TE: %s", + tok2str(brcm_tag_te_values, "unknown", + (tag[1] & BRCM_IG_TE_MASK))); + ND_PRINT(", TS: %d", tag[1] >> BRCM_IG_TS_SHIFT); + dst_map = (uint16_t)tag[2] << 8 | tag[3]; + ND_PRINT(", DST map: 0x%04x", dst_map & BRCM_IG_DSTMAP_MASK); + } else { + /* Egress Broadcom tag */ + ND_PRINT(", CID: %d", tag[1]); + ND_PRINT(", RC: %s", tok2str(brcm_tag_rc_values, + "reserved", tag[2])); + ND_PRINT(", TC: %d", (tag[3] >> BRCM_EG_TC_SHIFT) & + BRCM_EG_TC_MASK); + ND_PRINT(", port: %d", tag[3] & BRCM_EG_PID_MASK); + } + ND_PRINT(", "); +} + +void +brcm_tag_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, + const u_char *p) +{ + u_int caplen = h->caplen; + u_int length = h->len; + + ndo->ndo_protocol = "brcm-tag"; + ndo->ndo_ll_hdr_len += + ether_switch_tag_print(ndo, p, length, caplen, + brcm_tag_print, BRCM_TAG_LEN); +} + +void +brcm_tag_prepend_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, + const u_char *p) +{ + u_int caplen = h->caplen; + u_int length = h->len; + + ndo->ndo_protocol = "brcm-tag-prepend"; + ND_TCHECK_LEN(p, BRCM_TAG_LEN); + ndo->ndo_ll_hdr_len += BRCM_TAG_LEN; + + if (ndo->ndo_eflag) { + /* Print the prepended Broadcom tag. */ + brcm_tag_print(ndo, p); + } + p += BRCM_TAG_LEN; + length -= BRCM_TAG_LEN; + caplen -= BRCM_TAG_LEN; + + /* + * Now print the Ethernet frame following it. + */ + ndo->ndo_ll_hdr_len += + ether_print(ndo, p, length, caplen, NULL, NULL); +} |