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>
201 lines
6.2 KiB
C
201 lines
6.2 KiB
C
/* packet-ipoib.c
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* Routines for decoding IP over InfiniBand (IPoIB) packet disassembly
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* See: http://tools.ietf.org/html/rfc4391#section-6
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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 <epan/packet.h>
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#include <epan/etypes.h>
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#include <wiretap/wtap.h>
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void proto_register_ipoib(void);
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void proto_reg_handoff_ipoib(void);
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static int proto_ipoib = -1;
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static int hf_dgid = -1;
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static int hf_daddr = -1;
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static int hf_daddr_qpn = -1;
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static int hf_grh = -1;
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static int hf_grh_ip_version = -1;
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static int hf_grh_traffic_class = -1;
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static int hf_grh_flow_label = -1;
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static int hf_grh_sqpn = -1;
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static int hf_grh_sgid = -1;
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static int hf_type = -1;
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static int hf_reserved = -1;
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static gint ett_raw = -1;
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static gint ett_hdr = -1;
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static dissector_handle_t arp_handle;
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static dissector_handle_t ip_handle;
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static dissector_handle_t ipv6_handle;
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static int
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dissect_ipoib(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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proto_tree *fh_tree;
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proto_tree *fh_subtree;
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proto_item *ti;
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tvbuff_t *next_tvb;
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guint16 type;
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int grh_size = 0;
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if (pinfo->rec->rec_header.packet_header.pkt_encap == WTAP_ENCAP_IP_OVER_IB_PCAP)
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grh_size = 40;
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/* load the top pane info. This should be overwritten by
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the next protocol in the stack */
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "IPoIB");
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col_set_str(pinfo->cinfo, COL_INFO, "IP over Infiniband");
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/* populate a tree in the second pane with the IPoIB header data */
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if (tree) {
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ti = proto_tree_add_item (tree, proto_ipoib, tvb, 0, grh_size + 4, ENC_NA);
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fh_tree = proto_item_add_subtree(ti, ett_raw);
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/* for PCAP data populate subtree with GRH pseudo header data */
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if (pinfo->rec->rec_header.packet_header.pkt_encap == WTAP_ENCAP_IP_OVER_IB_PCAP) {
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/* Zero means GRH is not valid (unicast). Only destination
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address is set. */
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if (tvb_get_ntohs(tvb, 0) == 0) {
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ti = proto_tree_add_item (fh_tree, hf_daddr, tvb, 20, 20, ENC_NA);
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fh_subtree = proto_item_add_subtree(ti, ett_hdr);
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proto_tree_add_item(fh_subtree, hf_daddr_qpn, tvb, 21, 3, ENC_BIG_ENDIAN);
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proto_tree_add_item(fh_subtree, hf_dgid, tvb, 24, 16, ENC_NA);
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} else {
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ti = proto_tree_add_item (fh_tree, hf_grh, tvb, 0, 40, ENC_NA);
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fh_subtree = proto_item_add_subtree(ti, ett_hdr);
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proto_tree_add_item(fh_subtree, hf_grh_ip_version, tvb, 0, 1, ENC_BIG_ENDIAN);
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proto_tree_add_item(fh_subtree, hf_grh_traffic_class, tvb, 0, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(fh_subtree, hf_grh_flow_label,tvb, 0, 4, ENC_BIG_ENDIAN);
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proto_tree_add_item(fh_subtree, hf_grh_sqpn, tvb, 5, 3, ENC_BIG_ENDIAN);
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proto_tree_add_item(fh_subtree, hf_grh_sgid, tvb, 8, 16, ENC_NA);
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proto_tree_add_item(fh_subtree, hf_dgid, tvb, 24, 16, ENC_NA);
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}
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}
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proto_tree_add_item(fh_tree, hf_type, tvb, grh_size + 0, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(fh_tree, hf_reserved, tvb, grh_size + 2, 2, ENC_BIG_ENDIAN);
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}
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next_tvb = tvb_new_subset_remaining(tvb, grh_size + 4);
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type = tvb_get_ntohs(tvb, grh_size + 0);
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switch (type) {
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case ETHERTYPE_IP:
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call_dissector(ip_handle, next_tvb, pinfo, tree);
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break;
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case ETHERTYPE_IPv6:
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call_dissector(ipv6_handle, next_tvb, pinfo, tree);
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break;
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case ETHERTYPE_ARP:
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case ETHERTYPE_REVARP:
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call_dissector(arp_handle, next_tvb, pinfo, tree);
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break;
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default:
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break;
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}
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return tvb_captured_length(tvb);
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}
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void
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proto_register_ipoib(void)
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{
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static hf_register_info hf[] = {
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{ &hf_daddr,
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{ "Destination address", "ipoib.daddr",
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FT_NONE, BASE_NONE, NULL, 0x0,
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NULL, HFILL}},
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{ &hf_daddr_qpn,
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{ "Destination QPN", "ipoib.daddr.qpn",
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FT_UINT24, BASE_HEX, NULL, 0x0,
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NULL, HFILL}},
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{ &hf_dgid,
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{ "Destination GID", "ipoib.dgid",
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FT_IPv6, BASE_NONE, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_grh,
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{ "Global Route Header", "ipoib.grh",
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FT_NONE, BASE_NONE, NULL, 0x0,
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NULL, HFILL}},
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{ &hf_grh_ip_version, {
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"IP Version", "ipoib.grh.ipver",
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FT_UINT8, BASE_DEC, NULL, 0xF0,
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NULL, HFILL}},
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{ &hf_grh_traffic_class, {
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"Traffic Class", "ipoib.grh.tclass",
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FT_UINT16, BASE_DEC, NULL, 0x0FF0,
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NULL, HFILL}},
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{ &hf_grh_flow_label, {
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"Flow Label", "ipoib.grh.flowlabel",
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FT_UINT32, BASE_DEC, NULL, 0x000FFFFF,
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NULL, HFILL}},
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{ &hf_grh_sqpn,
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{ "Source QPN", "ipoib.grh.sqpn",
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FT_UINT24, BASE_HEX, NULL, 0x0,
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NULL, HFILL}},
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{ &hf_grh_sgid,
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{ "Source GID", "ipoib.grh.sgid",
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FT_IPv6, BASE_NONE, NULL, 0x0,
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NULL, HFILL }},
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{ &hf_type,
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{ "Type", "ipoib.type",
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FT_UINT16, BASE_HEX, VALS(etype_vals), 0x0,
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NULL, HFILL }},
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{ &hf_reserved,
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{ "Reserved", "ipoib.reserved",
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FT_UINT16, BASE_HEX, NULL, 0x0,
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NULL, HFILL }}
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};
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static gint *ett[] = {
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&ett_raw,
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&ett_hdr
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};
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proto_ipoib = proto_register_protocol("IP over Infiniband", "IPoIB", "ipoib");
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proto_register_field_array(proto_ipoib, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void
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proto_reg_handoff_ipoib(void)
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{
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dissector_handle_t ipoib_handle;
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/*
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* Get handles for the ARP, IP and IPv6 dissectors.
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*/
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arp_handle = find_dissector_add_dependency("arp", proto_ipoib);
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ip_handle = find_dissector_add_dependency("ip", proto_ipoib);
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ipv6_handle = find_dissector_add_dependency("ipv6", proto_ipoib);
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ipoib_handle = create_dissector_handle(dissect_ipoib, proto_ipoib);
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dissector_add_uint("wtap_encap", WTAP_ENCAP_IP_OVER_IB_SNOOP, ipoib_handle);
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dissector_add_uint("wtap_encap", WTAP_ENCAP_IP_OVER_IB_PCAP, ipoib_handle);
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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: 2
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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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* ex: set shiftwidth=2 tabstop=8 expandtab:
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* :indentSize=2:tabSize=8:noTabs=true:
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*/
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