| /* |
| * Copyright (c) 2014 The TCPDUMP project |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
| * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /* \summary: ATA over Ethernet (AoE) protocol printer */ |
| |
| /* specification: http://brantleycoilecompany.com/AoEr11.pdf */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <netdissect-stdinc.h> |
| |
| #include "netdissect.h" |
| #include "extract.h" |
| #include "addrtoname.h" |
| #include "ether.h" |
| |
| static const char tstr[] = " [|aoe]"; |
| |
| #define AOE_V1 1 |
| #define ATA_SECTOR_SIZE 512 |
| |
| #define AOEV1_CMD_ISSUE_ATA_COMMAND 0 |
| #define AOEV1_CMD_QUERY_CONFIG_INFORMATION 1 |
| #define AOEV1_CMD_MAC_MASK_LIST 2 |
| #define AOEV1_CMD_RESERVE_RELEASE 3 |
| |
| static const struct tok cmdcode_str[] = { |
| { AOEV1_CMD_ISSUE_ATA_COMMAND, "Issue ATA Command" }, |
| { AOEV1_CMD_QUERY_CONFIG_INFORMATION, "Query Config Information" }, |
| { AOEV1_CMD_MAC_MASK_LIST, "MAC Mask List" }, |
| { AOEV1_CMD_RESERVE_RELEASE, "Reserve/Release" }, |
| { 0, NULL } |
| }; |
| |
| #define AOEV1_COMMON_HDR_LEN 10U /* up to but w/o Arg */ |
| #define AOEV1_ISSUE_ARG_LEN 12U /* up to but w/o Data */ |
| #define AOEV1_QUERY_ARG_LEN 8U /* up to but w/o Config String */ |
| #define AOEV1_MAC_ARG_LEN 4U /* up to but w/o Directive 0 */ |
| #define AOEV1_RESERVE_ARG_LEN 2U /* up to but w/o Ethernet address 0 */ |
| #define AOEV1_MAX_CONFSTR_LEN 1024U |
| |
| #define AOEV1_FLAG_R 0x08 |
| #define AOEV1_FLAG_E 0x04 |
| |
| static const struct tok aoev1_flag_str[] = { |
| { AOEV1_FLAG_R, "Response" }, |
| { AOEV1_FLAG_E, "Error" }, |
| { 0x02, "MBZ-0x02" }, |
| { 0x01, "MBZ-0x01" }, |
| { 0, NULL } |
| }; |
| |
| static const struct tok aoev1_errcode_str[] = { |
| { 1, "Unrecognized command code" }, |
| { 2, "Bad argument parameter" }, |
| { 3, "Device unavailable" }, |
| { 4, "Config string present" }, |
| { 5, "Unsupported version" }, |
| { 6, "Target is reserved" }, |
| { 0, NULL } |
| }; |
| |
| #define AOEV1_AFLAG_E 0x40 |
| #define AOEV1_AFLAG_D 0x10 |
| #define AOEV1_AFLAG_A 0x02 |
| #define AOEV1_AFLAG_W 0x01 |
| |
| static const struct tok aoev1_aflag_str[] = { |
| { 0x08, "MBZ-0x08" }, |
| { AOEV1_AFLAG_E, "Ext48" }, |
| { 0x06, "MBZ-0x06" }, |
| { AOEV1_AFLAG_D, "Device" }, |
| { 0x04, "MBZ-0x04" }, |
| { 0x03, "MBZ-0x03" }, |
| { AOEV1_AFLAG_A, "Async" }, |
| { AOEV1_AFLAG_W, "Write" }, |
| { 0, NULL } |
| }; |
| |
| static const struct tok aoev1_ccmd_str[] = { |
| { 0, "read config string" }, |
| { 1, "test config string" }, |
| { 2, "test config string prefix" }, |
| { 3, "set config string" }, |
| { 4, "force set config string" }, |
| { 0, NULL } |
| }; |
| |
| static const struct tok aoev1_mcmd_str[] = { |
| { 0, "Read Mac Mask List" }, |
| { 1, "Edit Mac Mask List" }, |
| { 0, NULL } |
| }; |
| |
| static const struct tok aoev1_merror_str[] = { |
| { 1, "Unspecified Error" }, |
| { 2, "Bad DCmd directive" }, |
| { 3, "Mask list full" }, |
| { 0, NULL } |
| }; |
| |
| static const struct tok aoev1_dcmd_str[] = { |
| { 0, "No Directive" }, |
| { 1, "Add mac address to mask list" }, |
| { 2, "Delete mac address from mask list" }, |
| { 0, NULL } |
| }; |
| |
| static const struct tok aoev1_rcmd_str[] = { |
| { 0, "Read reserve list" }, |
| { 1, "Set reserve list" }, |
| { 2, "Force set reserve list" }, |
| { 0, NULL } |
| }; |
| |
| static void |
| aoev1_issue_print(netdissect_options *ndo, |
| const u_char *cp, const u_int len) |
| { |
| const u_char *ep = cp + len; |
| |
| if (len < AOEV1_ISSUE_ARG_LEN) |
| goto invalid; |
| /* AFlags */ |
| ND_TCHECK2(*cp, 1); |
| ND_PRINT((ndo, "\n\tAFlags: [%s]", bittok2str(aoev1_aflag_str, "none", *cp))); |
| cp += 1; |
| /* Err/Feature */ |
| ND_TCHECK2(*cp, 1); |
| ND_PRINT((ndo, ", Err/Feature: %u", *cp)); |
| cp += 1; |
| /* Sector Count (not correlated with the length) */ |
| ND_TCHECK2(*cp, 1); |
| ND_PRINT((ndo, ", Sector Count: %u", *cp)); |
| cp += 1; |
| /* Cmd/Status */ |
| ND_TCHECK2(*cp, 1); |
| ND_PRINT((ndo, ", Cmd/Status: %u", *cp)); |
| cp += 1; |
| /* lba0 */ |
| ND_TCHECK2(*cp, 1); |
| ND_PRINT((ndo, "\n\tlba0: %u", *cp)); |
| cp += 1; |
| /* lba1 */ |
| ND_TCHECK2(*cp, 1); |
| ND_PRINT((ndo, ", lba1: %u", *cp)); |
| cp += 1; |
| /* lba2 */ |
| ND_TCHECK2(*cp, 1); |
| ND_PRINT((ndo, ", lba2: %u", *cp)); |
| cp += 1; |
| /* lba3 */ |
| ND_TCHECK2(*cp, 1); |
| ND_PRINT((ndo, ", lba3: %u", *cp)); |
| cp += 1; |
| /* lba4 */ |
| ND_TCHECK2(*cp, 1); |
| ND_PRINT((ndo, ", lba4: %u", *cp)); |
| cp += 1; |
| /* lba5 */ |
| ND_TCHECK2(*cp, 1); |
| ND_PRINT((ndo, ", lba5: %u", *cp)); |
| cp += 1; |
| /* Reserved */ |
| ND_TCHECK2(*cp, 2); |
| cp += 2; |
| /* Data */ |
| if (len > AOEV1_ISSUE_ARG_LEN) |
| ND_PRINT((ndo, "\n\tData: %u bytes", len - AOEV1_ISSUE_ARG_LEN)); |
| return; |
| |
| invalid: |
| ND_PRINT((ndo, "%s", istr)); |
| ND_TCHECK2(*cp, ep - cp); |
| return; |
| trunc: |
| ND_PRINT((ndo, "%s", tstr)); |
| } |
| |
| static void |
| aoev1_query_print(netdissect_options *ndo, |
| const u_char *cp, const u_int len) |
| { |
| const u_char *ep = cp + len; |
| uint16_t cslen; |
| |
| if (len < AOEV1_QUERY_ARG_LEN) |
| goto invalid; |
| /* Buffer Count */ |
| ND_TCHECK2(*cp, 2); |
| ND_PRINT((ndo, "\n\tBuffer Count: %u", EXTRACT_16BITS(cp))); |
| cp += 2; |
| /* Firmware Version */ |
| ND_TCHECK2(*cp, 2); |
| ND_PRINT((ndo, ", Firmware Version: %u", EXTRACT_16BITS(cp))); |
| cp += 2; |
| /* Sector Count */ |
| ND_TCHECK2(*cp, 1); |
| ND_PRINT((ndo, ", Sector Count: %u", *cp)); |
| cp += 1; |
| /* AoE/CCmd */ |
| ND_TCHECK2(*cp, 1); |
| ND_PRINT((ndo, ", AoE: %u, CCmd: %s", (*cp & 0xF0) >> 4, |
| tok2str(aoev1_ccmd_str, "Unknown (0x02x)", *cp & 0x0F))); |
| cp += 1; |
| /* Config String Length */ |
| ND_TCHECK2(*cp, 2); |
| cslen = EXTRACT_16BITS(cp); |
| cp += 2; |
| if (cslen > AOEV1_MAX_CONFSTR_LEN || AOEV1_QUERY_ARG_LEN + cslen > len) |
| goto invalid; |
| /* Config String */ |
| ND_TCHECK2(*cp, cslen); |
| if (cslen) { |
| ND_PRINT((ndo, "\n\tConfig String (length %u): ", cslen)); |
| if (fn_printn(ndo, cp, cslen, ndo->ndo_snapend)) |
| goto trunc; |
| } |
| return; |
| |
| invalid: |
| ND_PRINT((ndo, "%s", istr)); |
| ND_TCHECK2(*cp, ep - cp); |
| return; |
| trunc: |
| ND_PRINT((ndo, "%s", tstr)); |
| } |
| |
| static void |
| aoev1_mac_print(netdissect_options *ndo, |
| const u_char *cp, const u_int len) |
| { |
| const u_char *ep = cp + len; |
| uint8_t dircount, i; |
| |
| if (len < AOEV1_MAC_ARG_LEN) |
| goto invalid; |
| /* Reserved */ |
| ND_TCHECK2(*cp, 1); |
| cp += 1; |
| /* MCmd */ |
| ND_TCHECK2(*cp, 1); |
| ND_PRINT((ndo, "\n\tMCmd: %s", tok2str(aoev1_mcmd_str, "Unknown (0x%02x)", *cp))); |
| cp += 1; |
| /* MError */ |
| ND_TCHECK2(*cp, 1); |
| ND_PRINT((ndo, ", MError: %s", tok2str(aoev1_merror_str, "Unknown (0x%02x)", *cp))); |
| cp += 1; |
| /* Dir Count */ |
| ND_TCHECK2(*cp, 1); |
| dircount = *cp; |
| cp += 1; |
| ND_PRINT((ndo, ", Dir Count: %u", dircount)); |
| if (AOEV1_MAC_ARG_LEN + dircount * 8 > len) |
| goto invalid; |
| /* directives */ |
| for (i = 0; i < dircount; i++) { |
| /* Reserved */ |
| ND_TCHECK2(*cp, 1); |
| cp += 1; |
| /* DCmd */ |
| ND_TCHECK2(*cp, 1); |
| ND_PRINT((ndo, "\n\t DCmd: %s", tok2str(aoev1_dcmd_str, "Unknown (0x%02x)", *cp))); |
| cp += 1; |
| /* Ethernet Address */ |
| ND_TCHECK2(*cp, ETHER_ADDR_LEN); |
| ND_PRINT((ndo, ", Ethernet Address: %s", etheraddr_string(ndo, cp))); |
| cp += ETHER_ADDR_LEN; |
| } |
| return; |
| |
| invalid: |
| ND_PRINT((ndo, "%s", istr)); |
| ND_TCHECK2(*cp, ep - cp); |
| return; |
| trunc: |
| ND_PRINT((ndo, "%s", tstr)); |
| } |
| |
| static void |
| aoev1_reserve_print(netdissect_options *ndo, |
| const u_char *cp, const u_int len) |
| { |
| const u_char *ep = cp + len; |
| uint8_t nmacs, i; |
| |
| if (len < AOEV1_RESERVE_ARG_LEN || (len - AOEV1_RESERVE_ARG_LEN) % ETHER_ADDR_LEN) |
| goto invalid; |
| /* RCmd */ |
| ND_TCHECK2(*cp, 1); |
| ND_PRINT((ndo, "\n\tRCmd: %s", tok2str(aoev1_rcmd_str, "Unknown (0x%02x)", *cp))); |
| cp += 1; |
| /* NMacs (correlated with the length) */ |
| ND_TCHECK2(*cp, 1); |
| nmacs = *cp; |
| cp += 1; |
| ND_PRINT((ndo, ", NMacs: %u", nmacs)); |
| if (AOEV1_RESERVE_ARG_LEN + nmacs * ETHER_ADDR_LEN != len) |
| goto invalid; |
| /* addresses */ |
| for (i = 0; i < nmacs; i++) { |
| ND_PRINT((ndo, "\n\tEthernet Address %u: %s", i, etheraddr_string(ndo, cp))); |
| cp += ETHER_ADDR_LEN; |
| } |
| return; |
| |
| invalid: |
| ND_PRINT((ndo, "%s", istr)); |
| ND_TCHECK2(*cp, ep - cp); |
| return; |
| trunc: |
| ND_PRINT((ndo, "%s", tstr)); |
| } |
| |
| /* cp points to the Ver/Flags octet */ |
| static void |
| aoev1_print(netdissect_options *ndo, |
| const u_char *cp, const u_int len) |
| { |
| const u_char *ep = cp + len; |
| uint8_t flags, command; |
| void (*cmd_decoder)(netdissect_options *, const u_char *, const u_int); |
| |
| if (len < AOEV1_COMMON_HDR_LEN) |
| goto invalid; |
| /* Flags */ |
| flags = *cp & 0x0F; |
| ND_PRINT((ndo, ", Flags: [%s]", bittok2str(aoev1_flag_str, "none", flags))); |
| cp += 1; |
| if (! ndo->ndo_vflag) |
| return; |
| /* Error */ |
| ND_TCHECK2(*cp, 1); |
| if (flags & AOEV1_FLAG_E) |
| ND_PRINT((ndo, "\n\tError: %s", tok2str(aoev1_errcode_str, "Invalid (%u)", *cp))); |
| cp += 1; |
| /* Major */ |
| ND_TCHECK2(*cp, 2); |
| ND_PRINT((ndo, "\n\tMajor: 0x%04x", EXTRACT_16BITS(cp))); |
| cp += 2; |
| /* Minor */ |
| ND_TCHECK2(*cp, 1); |
| ND_PRINT((ndo, ", Minor: 0x%02x", *cp)); |
| cp += 1; |
| /* Command */ |
| ND_TCHECK2(*cp, 1); |
| command = *cp; |
| cp += 1; |
| ND_PRINT((ndo, ", Command: %s", tok2str(cmdcode_str, "Unknown (0x%02x)", command))); |
| /* Tag */ |
| ND_TCHECK2(*cp, 4); |
| ND_PRINT((ndo, ", Tag: 0x%08x", EXTRACT_32BITS(cp))); |
| cp += 4; |
| /* Arg */ |
| cmd_decoder = |
| command == AOEV1_CMD_ISSUE_ATA_COMMAND ? aoev1_issue_print : |
| command == AOEV1_CMD_QUERY_CONFIG_INFORMATION ? aoev1_query_print : |
| command == AOEV1_CMD_MAC_MASK_LIST ? aoev1_mac_print : |
| command == AOEV1_CMD_RESERVE_RELEASE ? aoev1_reserve_print : |
| NULL; |
| if (cmd_decoder != NULL) |
| cmd_decoder(ndo, cp, len - AOEV1_COMMON_HDR_LEN); |
| return; |
| |
| invalid: |
| ND_PRINT((ndo, "%s", istr)); |
| ND_TCHECK2(*cp, ep - cp); |
| return; |
| trunc: |
| ND_PRINT((ndo, "%s", tstr)); |
| } |
| |
| void |
| aoe_print(netdissect_options *ndo, |
| const u_char *cp, const u_int len) |
| { |
| const u_char *ep = cp + len; |
| uint8_t ver; |
| |
| ND_PRINT((ndo, "AoE length %u", len)); |
| |
| if (len < 1) |
| goto invalid; |
| /* Ver/Flags */ |
| ND_TCHECK2(*cp, 1); |
| ver = (*cp & 0xF0) >> 4; |
| /* Don't advance cp yet: low order 4 bits are version-specific. */ |
| ND_PRINT((ndo, ", Ver %u", ver)); |
| |
| switch (ver) { |
| case AOE_V1: |
| aoev1_print(ndo, cp, len); |
| break; |
| } |
| return; |
| |
| invalid: |
| ND_PRINT((ndo, "%s", istr)); |
| ND_TCHECK2(*cp, ep - cp); |
| return; |
| trunc: |
| ND_PRINT((ndo, "%s", tstr)); |
| } |
| |