netfilter
firewalling, NAT, and packet mangling for linux
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Data Structures | Macros | Enumerations
netlink.h File Reference
#include <linux/socket.h>
#include <linux/types.h>
Include dependency graph for netlink.h:

Data Structures

struct  sockaddr_nl
 Netlink socket address. More...
 
struct  nlmsghdr
 Netlink message header. More...
 
struct  nlmsgerr
 Netlink error message. More...
 
struct  nl_pktinfo
 
struct  nlattr
 

Macros

#define NETLINK_ROUTE   0 /* Routing/device hook */
 
#define NETLINK_UNUSED   1 /* Unused number */
 
#define NETLINK_USERSOCK   2 /* Reserved for user mode socket protocols */
 
#define NETLINK_FIREWALL   3 /* Unused number, formerly ip_queue */
 
#define NETLINK_SOCK_DIAG   4 /* socket monitoring */
 
#define NETLINK_NFLOG   5 /* netfilter/iptables ULOG */
 
#define NETLINK_XFRM   6 /* ipsec */
 
#define NETLINK_SELINUX   7 /* SELinux event notifications */
 
#define NETLINK_ISCSI   8 /* Open-iSCSI */
 
#define NETLINK_AUDIT   9 /* auditing */
 
#define NETLINK_FIB_LOOKUP   10
 
#define NETLINK_CONNECTOR   11
 
#define NETLINK_NETFILTER   12 /* netfilter subsystem */
 
#define NETLINK_IP6_FW   13
 
#define NETLINK_DNRTMSG   14 /* DECnet routing messages */
 
#define NETLINK_KOBJECT_UEVENT   15 /* Kernel messages to userspace */
 
#define NETLINK_GENERIC   16
 
#define NETLINK_SCSITRANSPORT   18 /* SCSI Transports */
 
#define NETLINK_ECRYPTFS   19
 
#define NETLINK_RDMA   20
 
#define NETLINK_CRYPTO   21 /* Crypto layer */
 
#define NETLINK_INET_DIAG   NETLINK_SOCK_DIAG
 
#define MAX_LINKS   32
 
#define NLM_F_REQUEST   1 /* It is request message. */
 
#define NLM_F_MULTI   2 /* Multipart message, terminated by NLMSG_DONE */
 
#define NLM_F_ACK   4 /* Reply with ack, with zero or error code */
 
#define NLM_F_ECHO   8 /* Echo this request */
 
#define NLM_F_DUMP_INTR   16 /* Dump was inconsistent due to sequence change */
 
#define NLM_F_ROOT   0x100 /* specify tree root */
 
#define NLM_F_MATCH   0x200 /* return all matching */
 
#define NLM_F_ATOMIC   0x400 /* atomic GET */
 
#define NLM_F_DUMP   (NLM_F_ROOT|NLM_F_MATCH)
 
#define NLM_F_REPLACE   0x100 /* Override existing */
 
#define NLM_F_EXCL   0x200 /* Do not touch, if it exists */
 
#define NLM_F_CREATE   0x400 /* Create, if it does not exist */
 
#define NLM_F_APPEND   0x800 /* Add to end of list */
 
#define NLMSG_ALIGNTO   4U
 
#define NLMSG_ALIGN(len)   ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) )
 
#define NLMSG_HDRLEN   ((int) NLMSG_ALIGN(sizeof(struct nlmsghdr)))
 
#define NLMSG_LENGTH(len)   ((len)+NLMSG_ALIGN(NLMSG_HDRLEN))
 
#define NLMSG_SPACE(len)   NLMSG_ALIGN(NLMSG_LENGTH(len))
 
#define NLMSG_DATA(nlh)   ((void*)(((char*)nlh) + NLMSG_LENGTH(0)))
 
#define NLMSG_NEXT(nlh, len)
 
#define NLMSG_OK(nlh, len)
 
#define NLMSG_PAYLOAD(nlh, len)   ((nlh)->nlmsg_len - NLMSG_SPACE((len)))
 
#define NLMSG_NOOP   0x1 /* Nothing. */
 
#define NLMSG_ERROR   0x2 /* Error */
 
#define NLMSG_DONE   0x3 /* End of a dump */
 
#define NLMSG_OVERRUN   0x4 /* Data lost */
 
#define NLMSG_MIN_TYPE   0x10 /* < 0x10: reserved control messages */
 
#define NETLINK_ADD_MEMBERSHIP   1
 
#define NETLINK_DROP_MEMBERSHIP   2
 
#define NETLINK_PKTINFO   3
 
#define NETLINK_BROADCAST_ERROR   4
 
#define NETLINK_NO_ENOBUFS   5
 
#define NET_MAJOR   36 /* Major 36 is reserved for networking */
 
#define NLA_F_NESTED   (1 << 15)
 
#define NLA_F_NET_BYTEORDER   (1 << 14)
 
#define NLA_TYPE_MASK   ~(NLA_F_NESTED | NLA_F_NET_BYTEORDER)
 
#define NLA_ALIGNTO   4
 
#define NLA_ALIGN(len)   (((len) + NLA_ALIGNTO - 1) & ~(NLA_ALIGNTO - 1))
 
#define NLA_HDRLEN   ((int) NLA_ALIGN(sizeof(struct nlattr)))
 

Enumerations

enum  {
  NETLINK_UNCONNECTED = 0,
  NETLINK_CONNECTED
}
 

Macro Definition Documentation

#define MAX_LINKS   32
#define NET_MAJOR   36 /* Major 36 is reserved for networking */
#define NETLINK_ADD_MEMBERSHIP   1

Referenced by nl_socket_add_memberships().

#define NETLINK_AUDIT   9 /* auditing */
#define NETLINK_BROADCAST_ERROR   4
#define NETLINK_CONNECTOR   11
#define NETLINK_CRYPTO   21 /* Crypto layer */
#define NETLINK_DNRTMSG   14 /* DECnet routing messages */
#define NETLINK_DROP_MEMBERSHIP   2

Referenced by nl_socket_drop_memberships().

#define NETLINK_ECRYPTFS   19
#define NETLINK_FIB_LOOKUP   10

Referenced by main().

#define NETLINK_FIREWALL   3 /* Unused number, formerly ip_queue */

Referenced by ipq_create_handle().

#define NETLINK_GENERIC   16

Referenced by genl_connect(), genl_register(), and main().

#define NETLINK_INET_DIAG   NETLINK_SOCK_DIAG
#define NETLINK_IP6_FW   13

Referenced by ipq_create_handle().

#define NETLINK_ISCSI   8 /* Open-iSCSI */
#define NETLINK_KOBJECT_UEVENT   15 /* Kernel messages to userspace */
#define NETLINK_NETFILTER   12 /* netfilter subsystem */

Referenced by cthelper_init(), main(), mnl_event_nssocket(), nfct_mnl_open(), nfnl_connect(), nfnl_open(), nft_batch_is_supported(), nft_compatible_revision(), nft_init(), and xtables_events_main().

#define NETLINK_NFLOG   5 /* netfilter/iptables ULOG */
#define NETLINK_NO_ENOBUFS   5

Referenced by main(), and nl_init_event_handler().

#define NETLINK_PKTINFO   3

Referenced by nl_socket_recv_pktinfo().

#define NETLINK_RDMA   20
#define NETLINK_ROUTE   0 /* Routing/device hook */

Referenced by main(), and rtnl_open().

#define NETLINK_SCSITRANSPORT   18 /* SCSI Transports */
#define NETLINK_SELINUX   7 /* SELinux event notifications */
#define NETLINK_SOCK_DIAG   4 /* socket monitoring */
#define NETLINK_UNUSED   1 /* Unused number */
#define NETLINK_USERSOCK   2 /* Reserved for user mode socket protocols */
#define NETLINK_XFRM   6 /* ipsec */
#define NLA_ALIGN (   len)    (((len) + NLA_ALIGNTO - 1) & ~(NLA_ALIGNTO - 1))

Referenced by nfnl_queue_msg_send_verdict_payload(), nla_next(), nla_total_size(), and rtnl_ematch_parse().

#define NLA_ALIGNTO   4
#define NLA_F_NESTED   (1 << 15)

Referenced by mnl_attr_nest_start().

#define NLA_F_NET_BYTEORDER   (1 << 14)
#define NLA_HDRLEN   ((int) NLA_ALIGN(sizeof(struct nlattr)))

Referenced by nla_attr_size(), nla_data(), and nla_len().

#define NLA_TYPE_MASK   ~(NLA_F_NESTED | NLA_F_NET_BYTEORDER)

Referenced by mnl_attr_get_type(), and nla_type().

#define NLM_F_ACK   4 /* Reply with ack, with zero or error code */

Referenced by mnl_batch_supported(), mnl_nft_chain_add(), mnl_nft_chain_batch_del(), mnl_nft_chain_delete(), mnl_nft_chain_get(), mnl_nft_rule_add(), mnl_nft_rule_delete(), mnl_nft_set_add(), mnl_nft_set_delete(), mnl_nft_set_dump(), mnl_nft_set_get(), mnl_nft_setelem_add(), mnl_nft_setelem_delete(), mnl_nft_setelem_get(), mnl_nft_table_add(), mnl_nft_table_batch_del(), mnl_nft_table_delete(), mnl_nft_table_get(), mnl_set_dump(), mnl_setelem_get(), nflog_set_flags(), nflog_set_mode(), nflog_set_nlbufsiz(), nflog_set_qthresh(), nflog_set_timeout(), nfnl_talk(), nfq_set_mode(), nfq_set_queue_flags(), nfq_set_queue_maxlen(), nft_batch_is_supported(), nft_chain_add(), nft_chain_user_add(), nft_chain_user_rename(), nft_chain_zero_counters(), nft_compatible_revision(), nft_table_add(), and nl_auto_complete().

#define NLM_F_APPEND   0x800 /* Add to end of list */

Referenced by netlink_add_rule_list().

#define NLM_F_ATOMIC   0x400 /* atomic GET */
#define NLM_F_CREATE   0x400 /* Create, if it does not exist */

Referenced by __build_conntrack(), __parse_expect_message_type(), __parse_message_type(), author_new(), debug_nfct_cb(), main(), mnl_nft_chain_add(), mnl_nft_chain_batch_add(), mnl_nft_rule_add(), mnl_nft_rule_batch_add(), mnl_nft_set_add(), mnl_nft_set_batch_add(), mnl_nft_setelem_add(), mnl_nft_setelem_batch_add(), nfnl_nft_chain_build_add_request(), nfnl_nft_rule_add(), nfnl_nft_set_build_add_request(), nfnl_nft_setelem_add(), nfnl_nft_table_build_add_request(), nfnlmsg_ct_group(), nft_chain_add(), rtnl_addr_build_add_request(), rtnl_class_build_add_request(), rtnl_cls_build_add_request(), rtnl_qdisc_build_add_request(), rtnl_route_build_add_request(), and rtnl_rule_build_add_request().

#define NLM_F_DUMP   (NLM_F_ROOT|NLM_F_MATCH)

Referenced by mnl_chain_dump(), mnl_nft_chain_dump(), mnl_nft_rule_dump(), mnl_nft_set_dump(), mnl_nft_setelem_get(), mnl_nft_table_dump(), mnl_rule_dump(), mnl_set_dump(), mnl_setelem_get(), mnl_table_dump(), nfnl_ct_dump_request(), nfnl_nft_chain_dump_request(), nfnl_nft_rule_dump_request(), nfnl_nft_set_dump_request(), nfnl_nft_setelem_dump_request(), and nfnl_nft_table_dump_request().

#define NLM_F_DUMP_INTR   16 /* Dump was inconsistent due to sequence change */
#define NLM_F_ECHO   8 /* Echo this request */
#define NLM_F_EXCL   0x200 /* Do not touch, if it exists */

Referenced by __parse_expect_message_type(), __parse_message_type(), author_new(), debug_nfct_cb(), ipset_debug_msg(), main(), netlink_add_rule_batch(), nfnlmsg_ct_group(), and nft_chain_user_add().

#define NLM_F_MATCH   0x200 /* return all matching */

Referenced by rtnl_dump_type().

#define NLM_F_MULTI   2 /* Multipart message, terminated by NLMSG_DONE */

Referenced by ipulog_get_packet(), and nfnl_get_msg_next().

#define NLM_F_REPLACE   0x100 /* Override existing */

Referenced by main(), rtnl_cls_build_change_request(), and rtnl_qdisc_build_change_request().

#define NLM_F_REQUEST   1 /* It is request message. */

Referenced by ipq_set_mode(), ipq_set_verdict(), netem_build_msg(), nfacct_nlmsg_build_hdr(), nfct_helper_nlmsg_build_hdr(), nfct_timeout_nlmsg_build_hdr(), nflog_set_flags(), nflog_set_mode(), nflog_set_nlbufsiz(), nflog_set_qthresh(), nflog_set_timeout(), nfq_set_mode(), nfq_set_queue_flags(), nfq_set_queue_maxlen(), nft_compatible_revision(), nft_nlmsg_build_hdr(), nl_auto_complete(), and rtnl_dump_type().

#define NLM_F_ROOT   0x100 /* specify tree root */

Referenced by rtnl_dump_type().

#define NLMSG_ALIGN (   len)    ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) )

Referenced by genlmsg_attrdata(), genlmsg_attrlen(), genlmsg_valid_hdr(), netem_build_msg(), nfnl_addattr_l(), nfnl_check_attributes(), nfnl_handle_packet(), nfnl_listen(), nfnl_talk(), nla_reserve(), nlmsg_attrdata(), nlmsg_attrlen(), nlmsg_convert(), nlmsg_next(), nlmsg_tail(), and nlmsg_total_size().

#define NLMSG_ALIGNTO   4U

Referenced by flnl_lookup_build_request(), main(), netem_build_msg(), nl_send_simple(), nlmsg_put(), rtnl_class_build_delete_request(), rtnl_link_build_change_request(), rtnl_neightbl_build_change_request(), rtnl_qdisc_build_delete_request(), and rtnl_route_build_msg().

#define NLMSG_DATA (   nlh)    ((void*)(((char*)nlh) + NLMSG_LENGTH(0)))

Referenced by __build_filter_dump(), __parse_conntrack(), __parse_expect(), ipq_get_msgerr(), ipq_get_packet(), ipulog_get_packet(), netem_build_msg(), nfct_parse_conntrack(), nfexp_parse_expect(), nfnl_check_attributes(), nfnl_dump_packet(), nfnl_listen(), nfnl_talk(), and rtnl_receive().

#define NLMSG_DONE   0x3 /* End of a dump */

Referenced by ipset_debug_msg(), ipulog_get_packet(), nfnl_get_msg_next(), nfnl_listen(), and rtnl_receive().

#define NLMSG_ERROR   0x2 /* Error */

Referenced by ipset_debug_msg(), nfnl_listen(), nfnl_talk(), nl_msg_dump(), and rtnl_receive().

#define NLMSG_HDRLEN   ((int) NLMSG_ALIGN(sizeof(struct nlmsghdr)))

Referenced by genlmsg_len(), mnl_batch_ready(), nlmsg_data(), nlmsg_len(), nlmsg_msg_size(), and nlmsg_put().

#define NLMSG_LENGTH (   len)    ((len)+NLMSG_ALIGN(NLMSG_HDRLEN))

Referenced by __callback(), ipq_set_mode(), netem_build_msg(), nfct_parse_conntrack(), nfexp_parse_expect(), nfnl_fill_hdr(), nfnl_parse_hdr(), and rtnl_receive().

#define NLMSG_MIN_TYPE   0x10 /* < 0x10: reserved control messages */
#define NLMSG_NEXT (   nlh,
  len 
)
Value:
((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \
(struct nlmsghdr*)(((char*)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len)))
nlmsghdr
Netlink message header.
Definition: netlink.h:41
nlh
const struct nlmsghdr * nlh
Definition: libnetfilter_conntrack.h:565
len
int len
Definition: utils.c:56

Referenced by ipulog_get_packet(), nfnl_get_msg_next(), nfnl_iterator_next(), nfnl_process(), and rtnl_receive().

#define NLMSG_NOOP   0x1 /* Nothing. */

Referenced by ipset_debug_msg().

#define NLMSG_OK (   nlh,
  len 
)
Value:
((len) >= (int)sizeof(struct nlmsghdr) && \
(nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \
(nlh)->nlmsg_len <= (len))
nlmsghdr
Netlink message header.
Definition: netlink.h:41
nlh
const struct nlmsghdr * nlh
Definition: libnetfilter_conntrack.h:565
nlmsg_len
int nlmsg_len(const struct nlmsghdr *)
length of message payload
Definition: msg.c:232
len
int len
Definition: utils.c:56

Referenced by ipulog_get_packet(), nfnl_get_msg_first(), nfnl_get_msg_next(), nfnl_iterator_create(), nfnl_iterator_process(), nfnl_process(), and rtnl_receive().

#define NLMSG_OVERRUN   0x4 /* Data lost */

Referenced by ipset_debug_msg().

#define NLMSG_PAYLOAD (   nlh,
  len 
)    ((nlh)->nlmsg_len - NLMSG_SPACE((len)))
#define NLMSG_SPACE (   len)    NLMSG_ALIGN(NLMSG_LENGTH(len))

Referenced by nfnl_check_attributes(), nfnl_handle_packet(), nfnl_iterator_create(), nfnl_iterator_process(), and nfnl_process().

Enumeration Type Documentation

anonymous enum
Enumerator
NETLINK_UNCONNECTED 
NETLINK_CONNECTED