forked from osmocom/wireshark
![Dario Lombardo](/assets/img/avatar_default.png)
Change-Id: I92c94448e6641716d03158a5f332c8b53709423a Reviewed-on: https://code.wireshark.org/review/25756 Petri-Dish: Dario Lombardo <lomato@gmail.com> Reviewed-by: Anders Broman <a.broman58@gmail.com>
372 lines
12 KiB
C
372 lines
12 KiB
C
/* packet-iser.c
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* Routines for iSCSI RDMA Extensions dissection
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* Copyright 2014, Mellanox Technologies Ltd.
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* Code by Yan Burman.
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <errno.h>
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#include <epan/packet.h>
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#include <epan/prefs.h>
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#include <epan/conversation.h>
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#include <epan/addr_resolv.h>
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#include "packet-infiniband.h"
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#define ISER_WSV 0x08
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#define ISER_RSV 0x04
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#define ISER_REJ 0x01
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#define ISER_ISCSI_CTRL 0x10
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#define ISER_HELLO 0x20
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#define ISER_HELLORPLY 0x30
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#define ISER_OPCODE_MASK 0xf0
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#define ISER_SPECIFIC_MASK 0x0f
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#define ISER_HDR_SZ (1 + 3 + 4 + 8 + 4 + 8)
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#define ISCSI_HDR_SZ 48
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#define ISER_ISCSI_HDR_SZ (ISER_HDR_SZ + ISCSI_HDR_SZ)
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#define SID_ULP_MASK 0x00000000FF000000
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#define SID_PROTO_MASK 0x0000000000FF0000
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#define SID_PORT_MASK 0x000000000000FFFF
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#define SID_ULP 0x01
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#define SID_PROTO_TCP 0x06
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#define TCP_PORT_ISER_RANGE "3260"
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#define SID_MASK (SID_ULP_MASK | SID_PROTO_MASK)
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#define SID_ULP_TCP ((SID_ULP << 3 * 8) | (SID_PROTO_TCP << 2 * 8))
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void proto_reg_handoff_iser(void);
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void proto_register_iser(void);
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static int proto_iser = -1;
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static dissector_handle_t iscsi_handler;
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static int proto_ib = -1;
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/* iSER Header */
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static int hf_iser_flags = -1;
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static int hf_iser_opcode_f = -1;
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static int hf_iser_RSV_f = -1;
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static int hf_iser_WSV_f = -1;
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static int hf_iser_REJ_f = -1;
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static int hf_iser_write_stag = -1;
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static int hf_iser_write_va = -1;
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static int hf_iser_read_stag = -1;
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static int hf_iser_read_va = -1;
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static int hf_iser_ird = -1;
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static int hf_iser_ord = -1;
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/* Initialize the subtree pointers */
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static gint ett_iser = -1;
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static gint ett_iser_flags = -1;
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/* global preferences */
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static range_t *gPORT_RANGE;
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static const value_string iser_flags_opcode[] = {
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{ ISER_ISCSI_CTRL >> 4, "iSCSI Control-Type PDU"},
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{ ISER_HELLO >> 4, "Hello Message"},
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{ ISER_HELLORPLY >> 4, "HelloReply Message"},
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{0, NULL},
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};
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static const int *flags_fields[] = {
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&hf_iser_opcode_f,
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&hf_iser_WSV_f,
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&hf_iser_RSV_f,
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NULL
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};
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static const int *hello_flags_fields[] = {
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&hf_iser_opcode_f,
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NULL
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};
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static const int *hellorply_flags_fields[] = {
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&hf_iser_opcode_f,
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&hf_iser_REJ_f,
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NULL
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};
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static int dissect_packet(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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tvbuff_t *next_tvb;
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/* Set up structures needed to add the protocol subtree and manage it */
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proto_item *ti;
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proto_tree *iser_tree;
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guint offset = 0;
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guint8 flags, vers, opcode;
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if (tvb_reported_length(tvb) < ISER_ISCSI_HDR_SZ)
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return 0;
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flags = tvb_get_guint8(tvb, 0);
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opcode = flags & ISER_OPCODE_MASK;
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/* Check if the opcode is valid */
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switch (opcode) {
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case ISER_ISCSI_CTRL:
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switch (flags & ISER_SPECIFIC_MASK) {
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case 0:
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case ISER_WSV:
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case ISER_RSV:
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case ISER_RSV|ISER_WSV:
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break;
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default:
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return 0;
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}
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break;
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case ISER_HELLO:
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case ISER_HELLORPLY:
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vers = tvb_get_guint8(tvb, 1);
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if ((vers & 0xf) != 10)
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return 0;
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if (((vers >> 4) & 0x0f) != 10)
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return 0;
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break;
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default:
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return 0;
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}
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "iSER");
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/* Clear out stuff in the info column */
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col_clear(pinfo->cinfo, COL_INFO);
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/* Set info only for hello, since for iscsi, the iscsi dissector will */
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switch (opcode) {
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case ISER_HELLO:
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col_set_str(pinfo->cinfo, COL_INFO, "iSER Hello");
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break;
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case ISER_HELLORPLY:
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col_set_str(pinfo->cinfo, COL_INFO, "iSER HelloRply");
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break;
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}
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if (tree) {
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/* create display subtree for the protocol */
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ti = proto_tree_add_item(tree, proto_iser, tvb, 0, ISER_HDR_SZ, ENC_NA);
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iser_tree = proto_item_add_subtree(ti, ett_iser);
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switch (opcode) {
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case ISER_ISCSI_CTRL:
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proto_tree_add_bitmask(iser_tree, tvb, offset, hf_iser_flags,
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ett_iser_flags, flags_fields, ENC_LITTLE_ENDIAN);
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offset += 4;
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proto_tree_add_item(iser_tree, hf_iser_write_stag, tvb,
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offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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proto_tree_add_item(iser_tree, hf_iser_write_va, tvb,
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offset, 8, ENC_BIG_ENDIAN);
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offset += 8;
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proto_tree_add_item(iser_tree, hf_iser_read_stag, tvb,
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offset, 4, ENC_BIG_ENDIAN);
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offset += 4;
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proto_tree_add_item(iser_tree, hf_iser_read_va, tvb,
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offset, 8, ENC_BIG_ENDIAN);
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break;
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case ISER_HELLO:
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proto_tree_add_bitmask(iser_tree, tvb, offset, hf_iser_flags,
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ett_iser_flags, hello_flags_fields, ENC_LITTLE_ENDIAN);
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offset += 2;
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proto_tree_add_item(iser_tree, hf_iser_ird, tvb,
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offset, 2, ENC_BIG_ENDIAN);
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break;
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case ISER_HELLORPLY:
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proto_tree_add_bitmask(iser_tree, tvb, offset, hf_iser_flags,
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ett_iser_flags, hellorply_flags_fields, ENC_LITTLE_ENDIAN);
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offset += 2;
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proto_tree_add_item(iser_tree, hf_iser_ord, tvb,
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offset, 2, ENC_BIG_ENDIAN);
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break;
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}
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}
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if (opcode == ISER_ISCSI_CTRL) {
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next_tvb = tvb_new_subset_remaining(tvb, ISER_HDR_SZ);
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call_dissector(iscsi_handler, next_tvb, pinfo, tree);
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}
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return ISER_HDR_SZ;
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}
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static int
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dissect_iser(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
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void *data _U_)
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{
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conversation_t *conv;
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conversation_infiniband_data *convo_data = NULL;
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if (tvb_reported_length(tvb) < ISER_ISCSI_HDR_SZ)
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return FALSE;
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/* first try to find a conversation between the two current hosts. in most cases this
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will not work since we do not have the source QP. this WILL succeed when we're still
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in the process of CM negotiations */
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conv = find_conversation(pinfo->num, &pinfo->src, &pinfo->dst,
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ENDPOINT_IBQP, pinfo->srcport, pinfo->destport, 0);
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if (!conv) {
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/* if not, try to find an established RC channel. recall Infiniband conversations are
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registered with one side of the channel. since the packet is only guaranteed to
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contain the qpn of the destination, we'll use this */
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conv = find_conversation(pinfo->num, &pinfo->dst, &pinfo->dst,
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ENDPOINT_IBQP, pinfo->destport, pinfo->destport, NO_ADDR_B|NO_PORT_B);
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if (!conv)
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return FALSE; /* nothing to do with no conversation context */
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}
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convo_data = (conversation_infiniband_data *)conversation_get_proto_data(conv, proto_ib);
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if (!convo_data)
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return FALSE;
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if ((convo_data->service_id & SID_MASK) != SID_ULP_TCP)
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return FALSE; /* the service id doesn't match that of TCP ULP - nothing for us to do here */
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if (!(value_is_in_range(gPORT_RANGE, (guint32)(convo_data->service_id & SID_PORT_MASK))))
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return FALSE; /* the port doesn't match that of iSER - nothing for us to do here */
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dissect_packet(tvb, pinfo, tree, data);
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return TRUE;
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}
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void
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proto_register_iser(void)
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{
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module_t *iser_module;
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static hf_register_info hf[] = {
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{ &hf_iser_flags,
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{ "Flags", "iser.flags",
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FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}
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},
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{ &hf_iser_opcode_f,
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{ "Opcode", "iser.flags.opcode",
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FT_UINT8, BASE_HEX, VALS(iser_flags_opcode),
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ISER_OPCODE_MASK, NULL, HFILL}
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},
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{ &hf_iser_RSV_f,
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{ "RSV", "iser.flags.rsv",
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FT_BOOLEAN, 8, NULL, ISER_RSV, "Read STag Valid", HFILL}
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},
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{ &hf_iser_WSV_f,
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{ "WSV", "iser.flags.wsv",
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FT_BOOLEAN, 8, NULL, ISER_WSV, "Write STag Valid", HFILL}
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},
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{ &hf_iser_REJ_f,
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{ "REJ", "iser.flags.rej",
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FT_BOOLEAN, 8, NULL, ISER_REJ, "Target reject connection", HFILL}
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},
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{ &hf_iser_write_stag,
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{ "Write STag", "iser.write_stag",
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FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}
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},
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{ &hf_iser_write_va,
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{ "Write Base Offset", "iser.write_base_offset",
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FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL}
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},
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{ &hf_iser_read_stag,
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{ "Read STag", "iser.read_stag",
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FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}
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},
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{ &hf_iser_read_va,
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{ "Read Base Offset", "iser.read_base_offset",
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FT_UINT64, BASE_HEX, NULL, 0x0, NULL, HFILL}
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},
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{ &hf_iser_ird,
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{ "iSER-IRD", "iser.ird",
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FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL}
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},
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{ &hf_iser_ord,
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{ "iSER-ORD", "iser.ord",
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FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL}
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}
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};
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static gint *ett[] = {
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&ett_iser,
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&ett_iser_flags
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};
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proto_iser = proto_register_protocol (
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"iSCSI Extensions for RDMA", /* name */
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"iSER", /* short name */
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"iser" /* abbrev */
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);
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proto_register_field_array(proto_iser, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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/* Register preferences */
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iser_module = prefs_register_protocol(proto_iser, proto_reg_handoff_iser);
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prefs_register_static_text_preference(iser_module, "use_decode_as",
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"Heuristic matching preferences removed. Use Infiniband protocol preferences or Decode As.",
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"Simple heuristics can still be enable (may generate false positives) through Infiniband protocol preferences."
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"To force iSER dissection use Decode As");
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prefs_register_obsolete_preference(iser_module, "manual_en");
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prefs_register_obsolete_preference(iser_module, "addr_a");
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prefs_register_obsolete_preference(iser_module, "addr_a_type");
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prefs_register_obsolete_preference(iser_module, "addr_a_id");
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prefs_register_obsolete_preference(iser_module, "addr_a_qp");
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prefs_register_obsolete_preference(iser_module, "addr_b");
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prefs_register_obsolete_preference(iser_module, "addr_b_type");
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prefs_register_obsolete_preference(iser_module, "addr_b_id");
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prefs_register_obsolete_preference(iser_module, "addr_b_qp");
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range_convert_str(wmem_epan_scope(), &gPORT_RANGE, TCP_PORT_ISER_RANGE, MAX_TCP_PORT);
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prefs_register_range_preference(iser_module,
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"target_ports",
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"Target Ports Range",
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"Range of iSER target ports"
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"(default " TCP_PORT_ISER_RANGE ")",
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&gPORT_RANGE, MAX_TCP_PORT);
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}
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void
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proto_reg_handoff_iser(void)
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{
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heur_dissector_add("infiniband.payload", dissect_iser, "iSER Infiniband", "iser_infiniband", proto_iser, HEURISTIC_ENABLE);
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heur_dissector_add("infiniband.mad.cm.private", dissect_iser, "iSER in PrivateData of CM packets", "iser_ib_private", proto_iser, HEURISTIC_ENABLE);
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dissector_add_for_decode_as("infiniband", create_dissector_handle( dissect_packet, proto_iser ) );
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iscsi_handler = find_dissector_add_dependency("iscsi", proto_iser);
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proto_ib = proto_get_id_by_filter_name( "infiniband" );
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}
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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