netlink.h revision 351efcde4e62967362a10b29f3b701cfecd7cdfc
1#ifndef __LINUX_NETLINK_H 2#define __LINUX_NETLINK_H 3 4#include <linux/socket.h> /* for sa_family_t */ 5#include <linux/types.h> 6 7#define NETLINK_ROUTE 0 /* Routing/device hook */ 8#define NETLINK_W1 1 /* 1-wire subsystem */ 9#define NETLINK_USERSOCK 2 /* Reserved for user mode socket protocols */ 10#define NETLINK_FIREWALL 3 /* Firewalling hook */ 11#define NETLINK_INET_DIAG 4 /* INET socket monitoring */ 12#define NETLINK_NFLOG 5 /* netfilter/iptables ULOG */ 13#define NETLINK_XFRM 6 /* ipsec */ 14#define NETLINK_SELINUX 7 /* SELinux event notifications */ 15#define NETLINK_ISCSI 8 /* Open-iSCSI */ 16#define NETLINK_AUDIT 9 /* auditing */ 17#define NETLINK_FIB_LOOKUP 10 18#define NETLINK_NETFILTER 12 /* netfilter subsystem */ 19#define NETLINK_IP6_FW 13 20#define NETLINK_DNRTMSG 14 /* DECnet routing messages */ 21#define NETLINK_KOBJECT_UEVENT 15 /* Kernel messages to userspace */ 22 23#define MAX_LINKS 32 24 25struct sockaddr_nl 26{ 27 sa_family_t nl_family; /* AF_NETLINK */ 28 unsigned short nl_pad; /* zero */ 29 __u32 nl_pid; /* process pid */ 30 __u32 nl_groups; /* multicast groups mask */ 31}; 32 33struct nlmsghdr 34{ 35 __u32 nlmsg_len; /* Length of message including header */ 36 __u16 nlmsg_type; /* Message content */ 37 __u16 nlmsg_flags; /* Additional flags */ 38 __u32 nlmsg_seq; /* Sequence number */ 39 __u32 nlmsg_pid; /* Sending process PID */ 40}; 41 42/* Flags values */ 43 44#define NLM_F_REQUEST 1 /* It is request message. */ 45#define NLM_F_MULTI 2 /* Multipart message, terminated by NLMSG_DONE */ 46#define NLM_F_ACK 4 /* Reply with ack, with zero or error code */ 47#define NLM_F_ECHO 8 /* Echo this request */ 48 49/* Modifiers to GET request */ 50#define NLM_F_ROOT 0x100 /* specify tree root */ 51#define NLM_F_MATCH 0x200 /* return all matching */ 52#define NLM_F_ATOMIC 0x400 /* atomic GET */ 53#define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH) 54 55/* Modifiers to NEW request */ 56#define NLM_F_REPLACE 0x100 /* Override existing */ 57#define NLM_F_EXCL 0x200 /* Do not touch, if it exists */ 58#define NLM_F_CREATE 0x400 /* Create, if it does not exist */ 59#define NLM_F_APPEND 0x800 /* Add to end of list */ 60 61/* 62 4.4BSD ADD NLM_F_CREATE|NLM_F_EXCL 63 4.4BSD CHANGE NLM_F_REPLACE 64 65 True CHANGE NLM_F_CREATE|NLM_F_REPLACE 66 Append NLM_F_CREATE 67 Check NLM_F_EXCL 68 */ 69 70#define NLMSG_ALIGNTO 4 71#define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) ) 72#define NLMSG_LENGTH(len) ((len)+NLMSG_ALIGN(sizeof(struct nlmsghdr))) 73#define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len)) 74#define NLMSG_DATA(nlh) ((void*)(((char*)nlh) + NLMSG_LENGTH(0))) 75#define NLMSG_NEXT(nlh,len) ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \ 76 (struct nlmsghdr*)(((char*)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len))) 77#define NLMSG_OK(nlh,len) ((len) >= (int)sizeof(struct nlmsghdr) && \ 78 (nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \ 79 (nlh)->nlmsg_len <= (len)) 80#define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len))) 81 82#define NLMSG_NOOP 0x1 /* Nothing. */ 83#define NLMSG_ERROR 0x2 /* Error */ 84#define NLMSG_DONE 0x3 /* End of a dump */ 85#define NLMSG_OVERRUN 0x4 /* Data lost */ 86 87struct nlmsgerr 88{ 89 int error; 90 struct nlmsghdr msg; 91}; 92 93#define NETLINK_ADD_MEMBERSHIP 1 94#define NETLINK_DROP_MEMBERSHIP 2 95#define NETLINK_PKTINFO 3 96 97struct nl_pktinfo 98{ 99 __u32 group; 100}; 101 102#define NET_MAJOR 36 /* Major 36 is reserved for networking */ 103 104enum { 105 NETLINK_UNCONNECTED = 0, 106 NETLINK_CONNECTED, 107}; 108 109 110#endif /* __LINUX_NETLINK_H */ 111