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/* packet-netlink.h
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 2001 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef __PACKET_NETLINK_H__
#define __PACKET_NETLINK_H__
#include <epan/value_string.h>
/* from <include/uapi/linux/netlink.h> prefixed with WS_ */
enum {
WS_NETLINK_ROUTE = 0,
WS_NETLINK_UNUSED = 1,
WS_NETLINK_USERSOCK = 2,
WS_NETLINK_FIREWALL = 3,
WS_NETLINK_SOCK_DIAG = 4,
WS_NETLINK_NFLOG = 5,
WS_NETLINK_XFRM = 6,
WS_NETLINK_SELINUX = 7,
WS_NETLINK_ISCSI = 8,
WS_NETLINK_AUDIT = 9,
WS_NETLINK_FIB_LOOKUP = 10,
WS_NETLINK_CONNECTOR = 11,
WS_NETLINK_NETFILTER = 12,
WS_NETLINK_IP6_FW = 13,
WS_NETLINK_DNRTMSG = 14,
WS_NETLINK_KOBJECT_UEVENT = 15,
WS_NETLINK_GENERIC = 16,
/* leave room for NETLINK_DM (DM Events) */
WS_NETLINK_SCSITRANSPORT = 18,
WS_NETLINK_ECRYPTFS = 19,
WS_NETLINK_RDMA = 20,
WS_NETLINK_CRYPTO = 21,
WS_NETLINK_SMC = 22
};
/* from <include/uapi/linux/netlink.h> prefixed with WS_ */
enum {
WS_NLM_F_REQUEST = 1, /* It is request message.*/
WS_NLM_F_MULTI = 2, /* Multipart message, terminated by NETLINK_MSG_DONE */
WS_NLM_F_ACK = 4, /* Reply with ack, with zero or error code */
WS_NLM_F_ECHO = 8, /* Echo this request */
WS_NLM_F_DUMP_INTR = 16, /* Dump was inconsistent due to sequence change */
WS_NLM_F_DUMP_FILTERED = 32, /* Dump was filtered as requested */
/* Modifiers to Get request */
WS_NLM_F_ROOT = 0x100, /* specify tree root */
WS_NLM_F_MATCH = 0x200, /* return all matching */
WS_NLM_F_ATOMIC = 0x400, /* return an atomic snapshot of the table */
/* Modifiers to NEW request */
WS_NLM_F_REPLACE = 0x100, /* Override existing */
WS_NLM_F_EXCL = 0x200, /* Do not touch, if it exists */
WS_NLM_F_CREATE = 0x400, /* Create, if it does */
WS_NLM_F_APPEND = 0x800, /* Add to end of list */
/* Modifiers to DELETE request */
WS_NLM_F_NONREC = 0x100, /* Do not delete recursively */
/* Flags for ACK message */
WS_NLM_F_CAPPED = 0x100, /* request was capped */
WS_NLM_F_ACK_TLVS = 0x200 /* extended ACK TLVs were included */
};
extern value_string_ext netlink_family_vals_ext;
enum {
WS_NLMSG_NOOP = 0x01,
WS_NLMSG_ERROR = 0x02,
WS_NLMSG_DONE = 0x03,
WS_NLMSG_OVERRUN = 0x04,
WS_NLMSG_MIN_TYPE = 0x10 /** type < WS_NLMSG_MIN_TYPE are reserved */
};
/* from <include/uapi/linux/netfilter.h>. Looks like AF_xxx, except for NFPROTO_ARP */
enum ws_nfproto {
WS_NFPROTO_UNSPEC = 0,
WS_NFPROTO_INET = 1,
WS_NFPROTO_IPV4 = 2,
WS_NFPROTO_ARP = 3,
WS_NFPROTO_NETDEV = 5,
WS_NFPROTO_BRIDGE = 7,
WS_NFPROTO_IPV6 = 10,
WS_NFPROTO_DECNET = 12,
};
extern const value_string nfproto_family_vals[];
extern const value_string netfilter_hooks_vals[];
#define PACKET_NETLINK_MAGIC 0x4A5ACCCE
struct packet_netlink_data {
uint32_t magic; /* PACKET_NETLINK_MAGIC */
int encoding;
uint16_t type;
};
/**
* Dissects the Netlink message header (struct nlmsghdr). The "hfi_type" field
* is added for the "nlmsg_type" field and returned into pi_type.
*/
int dissect_netlink_header(tvbuff_t *tvb, proto_tree *tree, int offset, int encoding, int hf_type, proto_item **pi_type);
typedef int netlink_attributes_cb_t(tvbuff_t *tvb, void *data, struct packet_netlink_data *nl_data, proto_tree *tree, int nla_type, int offset, int len);
int dissect_netlink_attributes(tvbuff_t *tvb, int hf_type, int ett, void *data, struct packet_netlink_data *nl_data, proto_tree *tree, int offset, int length, netlink_attributes_cb_t cb);
int dissect_netlink_attributes_to_end(tvbuff_t *tvb, int hf_type, int ett, void *data, struct packet_netlink_data *nl_data, proto_tree *tree, int offset, netlink_attributes_cb_t cb);
/*
* Similar to dissect_netlink_attributes, but used to parse nested attributes
* that model an array of attributes. The first level (tree ett_array) contains
* array elements and its type field is the array index. The next level (tree
* ett_attrib) contains attributes (where hfi_type applies).
*/
int dissect_netlink_attributes_array(tvbuff_t *tvb, int hf_type, int ett_array, int ett_attrib, void *data, struct packet_netlink_data *nl_data, proto_tree *tree, int offset, int length, netlink_attributes_cb_t cb);
#define NLA_F_NESTED 0x8000
#define NLA_F_NET_BYTEORDER 0x4000
#define NLA_TYPE_MASK 0x3fff
/*
* Format of the data that is passed to "genl.family" dissectors.
*/
typedef struct {
struct packet_netlink_data *nl_data;
/* For internal use by genl. */
proto_tree *genl_tree;
/* fields from genlmsghdr */
uint8_t cmd; /* Command number */
/* XXX This should contain a family version number as well. */
} genl_info_t;
int dissect_genl_header(tvbuff_t *tvb, genl_info_t *genl_info, struct packet_netlink_data *nl_data, int hf_cmd);
#endif /* __PACKET_NETLINK_H__ */
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
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