2013-12-11 20:48:18 +00:00
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/* packet-netlink-netfilter.c
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#define NEW_PROTO_TREE_API
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#include "config.h"
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#include <epan/packet.h>
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#include "packet-netlink.h"
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2013-12-13 22:34:10 +00:00
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void proto_register_netlink_netfilter(void);
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void proto_reg_handoff_netlink_netfilter(void);
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2013-12-11 21:30:23 +00:00
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typedef struct {
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2013-12-11 20:48:18 +00:00
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packet_info *pinfo;
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struct packet_netlink_data *data;
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int encoding; /* copy of data->encoding */
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2013-12-11 21:30:23 +00:00
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} netlink_netfilter_info_t;
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2013-12-11 20:48:18 +00:00
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static dissector_handle_t netlink_netfilter;
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static dissector_handle_t nflog_handle;
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static header_field_info *hfi_netlink_netfilter = NULL;
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#define NETLINK_NETFILTER_HFI_INIT HFI_INIT(proto_netlink_netfilter)
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/* nfnetlink subsystems from <linux/netfilter/nfnetlink.h> */
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enum {
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WS_NFNL_SUBSYS_NONE = 0,
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WS_NFNL_SUBSYS_CTNETLINK = 1,
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WS_NFNL_SUBSYS_CTNETLINK_EXP = 2,
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WS_NFNL_SUBSYS_QUEUE = 3,
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WS_NFNL_SUBSYS_ULOG = 4,
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WS_NFNL_SUBSYS_OSF = 5,
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WS_NFNL_SUBSYS_IPSET = 6,
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WS_NFNL_SUBSYS_ACCT = 7,
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WS_NFNL_SUBSYS_CTNETLINK_TIMEOUT = 8,
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WS_NFNL_SUBSYS_CTHELPER = 9
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};
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/* nfnetlink ULOG subsystem types from <linux/netfilter/nfnetlink_log.h> */
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enum ws_nfulnl_msg_types {
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WS_NFULNL_MSG_PACKET = 0,
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WS_NFULNL_MSG_CONFIG = 1
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};
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/* nfnetlink QUEUE subsystem types from <linux/netfilter/nfnetlink_queue.h> */
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enum ws_nfqnl_msg_types {
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WS_NFQNL_MSG_PACKET = 0,
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WS_NFQNL_MSG_VERDICT = 1,
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WS_NFQNL_MSG_CONFIG = 2,
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WS_NFQNL_MSG_VERDICT_BATCH = 3
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};
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static int ett_netlink_netfilter = -1;
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/* QUEUE */
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static const value_string netlink_netfilter_queue_type_vals[] = {
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{ WS_NFQNL_MSG_PACKET, "Packet" },
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{ WS_NFQNL_MSG_VERDICT, "Verdict" },
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{ WS_NFQNL_MSG_CONFIG, "Config" },
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{ WS_NFQNL_MSG_VERDICT_BATCH, "Verdict (batch)" },
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{ 0, NULL }
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};
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static header_field_info hfi_netlink_netfilter_queue_type NETLINK_NETFILTER_HFI_INIT =
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{ "Type", "netlink-netfilter.queue_type", FT_UINT16, BASE_DEC,
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VALS(netlink_netfilter_queue_type_vals), 0x00FF, NULL, HFILL };
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static int
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2013-12-13 22:34:10 +00:00
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dissect_netfilter_queue(tvbuff_t *tvb _U_, netlink_netfilter_info_t *info, proto_tree *tree, int offset)
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2013-12-11 20:48:18 +00:00
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{
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enum ws_nfqnl_msg_types type = (enum ws_nfqnl_msg_types) (info->data->type & 0xff);
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proto_tree_add_uint(tree, &hfi_netlink_netfilter_queue_type, NULL, 0, 0, info->data->type);
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switch (type) {
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default:
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break;
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}
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return offset;
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}
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/* ULOG */
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static const value_string netlink_netfilter_ulog_type_vals[] = {
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{ WS_NFULNL_MSG_PACKET, "Packet" },
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{ WS_NFULNL_MSG_CONFIG, "Config" },
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{ 0, NULL }
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};
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static header_field_info hfi_netlink_netfilter_ulog_type NETLINK_NETFILTER_HFI_INIT =
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{ "Type", "netlink-netfilter.ulog_type", FT_UINT16, BASE_DEC,
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VALS(netlink_netfilter_ulog_type_vals), 0x00FF, NULL, HFILL };
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static int
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2013-12-13 22:34:10 +00:00
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dissect_netfilter_ulog(tvbuff_t *tvb, netlink_netfilter_info_t *info, proto_tree *tree, int offset)
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2013-12-11 20:48:18 +00:00
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{
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enum ws_nfulnl_msg_types type = (enum ws_nfulnl_msg_types) (info->data->type & 0xff);
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proto_tree_add_uint(tree, &hfi_netlink_netfilter_ulog_type, NULL, 0, 0, info->data->type);
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switch (type) {
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case WS_NFULNL_MSG_PACKET:
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call_dissector(nflog_handle, tvb, info->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 offset;
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}
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static const value_string netlink_netfilter_subsystem_vals[] = {
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2014-10-05 19:57:05 +00:00
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{ WS_NFNL_SUBSYS_NONE, "None" },
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{ WS_NFNL_SUBSYS_CTNETLINK, "Conntrack" },
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{ WS_NFNL_SUBSYS_CTNETLINK_EXP, "Conntrack expect" },
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{ WS_NFNL_SUBSYS_QUEUE, "Netfilter packet queue" },
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{ WS_NFNL_SUBSYS_ULOG, "Netfilter userspace logging" },
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{ WS_NFNL_SUBSYS_OSF, "OS fingerprint" },
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{ WS_NFNL_SUBSYS_IPSET, "IP set" },
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{ WS_NFNL_SUBSYS_ACCT, "Extended Netfilter accounting infrastructure" },
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2013-12-11 20:48:18 +00:00
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{ WS_NFNL_SUBSYS_CTNETLINK_TIMEOUT, "Extended Netfilter Connection Tracking timeout tuning" },
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2014-10-05 19:57:05 +00:00
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{ WS_NFNL_SUBSYS_CTHELPER, "Connection Tracking Helpers" },
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2013-12-11 20:48:18 +00:00
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{ 0, NULL }
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};
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static header_field_info hfi_netlink_netfilter_subsys NETLINK_NETFILTER_HFI_INIT =
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{ "Subsystem", "netlink-netfilter.subsys", FT_UINT16, BASE_DEC,
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VALS(netlink_netfilter_subsystem_vals), 0xFF00, NULL, HFILL };
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static int
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dissect_netlink_netfilter(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *_data)
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{
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struct packet_netlink_data *data = NULL;
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2013-12-11 21:30:23 +00:00
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netlink_netfilter_info_t info;
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2013-12-11 20:48:18 +00:00
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int offset;
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if (_data) {
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if (((struct packet_netlink_data *) _data)->magic == PACKET_NETLINK_MAGIC)
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data = (struct packet_netlink_data *) _data;
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}
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DISSECTOR_ASSERT(data);
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "Netlink netfilter");
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col_clear(pinfo->cinfo, COL_INFO);
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if (tree) {
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proto_item_set_text(tree, "Linux netlink netfilter message");
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/* XXX, from header tvb */
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proto_tree_add_uint(tree, &hfi_netlink_netfilter_subsys, NULL, 0, 0, data->type);
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}
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info.encoding = data->encoding;
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info.pinfo = pinfo;
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info.data = data;
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offset = 0;
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switch (data->type >> 8) {
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2013-12-11 21:30:23 +00:00
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case WS_NFNL_SUBSYS_QUEUE:
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2013-12-13 22:34:10 +00:00
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offset = dissect_netfilter_queue(tvb, &info, tree, offset);
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2013-12-11 21:30:23 +00:00
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break;
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2013-12-11 20:48:18 +00:00
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case WS_NFNL_SUBSYS_ULOG:
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2013-12-13 22:34:10 +00:00
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offset = dissect_netfilter_ulog(tvb, &info, tree, offset);
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2013-12-11 20:48:18 +00:00
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break;
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}
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return offset;
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}
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void
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proto_register_netlink_netfilter(void)
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{
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#ifndef HAVE_HFI_SECTION_INIT
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static header_field_info *hfi[] = {
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&hfi_netlink_netfilter_subsys,
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/* QUEUE */
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&hfi_netlink_netfilter_queue_type,
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/* ULOG */
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&hfi_netlink_netfilter_ulog_type,
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};
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#endif
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static gint *ett[] = {
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&ett_netlink_netfilter,
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};
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int proto_netlink_netfilter;
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proto_netlink_netfilter = proto_register_protocol("Linux netlink netfilter protocol", "netfilter", "netlink-netfilter" );
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hfi_netlink_netfilter = proto_registrar_get_nth(proto_netlink_netfilter);
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proto_register_fields(proto_netlink_netfilter, hfi, array_length(hfi));
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proto_register_subtree_array(ett, array_length(ett));
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netlink_netfilter = new_create_dissector_handle(dissect_netlink_netfilter, proto_netlink_netfilter);
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}
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void
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proto_reg_handoff_netlink_netfilter(void)
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{
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dissector_add_uint("netlink.protocol", WS_NETLINK_NETFILTER, netlink_netfilter);
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nflog_handle = find_dissector("nflog");
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}
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2014-10-05 19:57:05 +00:00
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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: 8
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* tab-width: 8
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* indent-tabs-mode: t
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* End:
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*
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* vi: set shiftwidth=8 tabstop=8 noexpandtab:
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* :indentSize=8:tabSize=8:noTabs=false:
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*/
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