1 #ifndef _UAPI__LINUX_NETLINK_H 2 #define _UAPI__LINUX_NETLINK_H 3 4 #include <linux/kernel.h> 5 #include <linux/socket.h> /* for __kernel_sa_family_t */ 6 #include <linux/types.h> 7 8 #define NETLINK_ROUTE 0 /* Routing/device hook */ 9 #define NETLINK_UNUSED 1 /* Unused number */ 10 #define NETLINK_USERSOCK 2 /* Reserved for user mode socket protocols */ 11 #define NETLINK_FIREWALL 3 /* Unused number, formerly ip_queue */ 12 #define NETLINK_SOCK_DIAG 4 /* socket monitoring */ 13 #define NETLINK_NFLOG 5 /* netfilter/iptables ULOG */ 14 #define NETLINK_XFRM 6 /* ipsec */ 15 #define NETLINK_SELINUX 7 /* SELinux event notifications */ 16 #define NETLINK_ISCSI 8 /* Open-iSCSI */ 17 #define NETLINK_AUDIT 9 /* auditing */ 18 #define NETLINK_FIB_LOOKUP 10 19 #define NETLINK_CONNECTOR 11 20 #define NETLINK_NETFILTER 12 /* netfilter subsystem */ 21 #define NETLINK_IP6_FW 13 22 #define NETLINK_DNRTMSG 14 /* DECnet routing messages */ 23 #define NETLINK_KOBJECT_UEVENT 15 /* Kernel messages to userspace */ 24 #define NETLINK_GENERIC 16 25 /* leave room for NETLINK_DM (DM Events) */ 26 #define NETLINK_SCSITRANSPORT 18 /* SCSI Transports */ 27 #define NETLINK_ECRYPTFS 19 28 #define NETLINK_RDMA 20 29 #define NETLINK_CRYPTO 21 /* Crypto layer */ 30 31 #define NETLINK_INET_DIAG NETLINK_SOCK_DIAG 32 33 #define MAX_LINKS 32 34 35 struct sockaddr_nl { 36 __kernel_sa_family_t nl_family; /* AF_NETLINK */ 37 unsigned short nl_pad; /* zero */ 38 __u32 nl_pid; /* port ID */ 39 __u32 nl_groups; /* multicast groups mask */ 40 }; 41 42 struct nlmsghdr { 43 __u32 nlmsg_len; /* Length of message including header */ 44 __u16 nlmsg_type; /* Message content */ 45 __u16 nlmsg_flags; /* Additional flags */ 46 __u32 nlmsg_seq; /* Sequence number */ 47 __u32 nlmsg_pid; /* Sending process port ID */ 48 }; 49 50 /* Flags values */ 51 52 #define NLM_F_REQUEST 1 /* It is request message. */ 53 #define NLM_F_MULTI 2 /* Multipart message, terminated by NLMSG_DONE */ 54 #define NLM_F_ACK 4 /* Reply with ack, with zero or error code */ 55 #define NLM_F_ECHO 8 /* Echo this request */ 56 #define NLM_F_DUMP_INTR 16 /* Dump was inconsistent due to sequence change */ 57 58 /* Modifiers to GET request */ 59 #define NLM_F_ROOT 0x100 /* specify tree root */ 60 #define NLM_F_MATCH 0x200 /* return all matching */ 61 #define NLM_F_ATOMIC 0x400 /* atomic GET */ 62 #define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH) 63 64 /* Modifiers to NEW request */ 65 #define NLM_F_REPLACE 0x100 /* Override existing */ 66 #define NLM_F_EXCL 0x200 /* Do not touch, if it exists */ 67 #define NLM_F_CREATE 0x400 /* Create, if it does not exist */ 68 #define NLM_F_APPEND 0x800 /* Add to end of list */ 69 70 /* 71 4.4BSD ADD NLM_F_CREATE|NLM_F_EXCL 72 4.4BSD CHANGE NLM_F_REPLACE 73 74 True CHANGE NLM_F_CREATE|NLM_F_REPLACE 75 Append NLM_F_CREATE 76 Check NLM_F_EXCL 77 */ 78 79 #define NLMSG_ALIGNTO 4U 80 #define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) ) 81 #define NLMSG_HDRLEN ((int) NLMSG_ALIGN(sizeof(struct nlmsghdr))) 82 #define NLMSG_LENGTH(len) ((len) + NLMSG_HDRLEN) 83 #define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len)) 84 #define NLMSG_DATA(nlh) ((void*)(((char*)nlh) + NLMSG_LENGTH(0))) 85 #define NLMSG_NEXT(nlh,len) ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \ 86 (struct nlmsghdr*)(((char*)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len))) 87 #define NLMSG_OK(nlh,len) ((len) >= (int)sizeof(struct nlmsghdr) && \ 88 (nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \ 89 (nlh)->nlmsg_len <= (len)) 90 #define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len))) 91 92 #define NLMSG_NOOP 0x1 /* Nothing. */ 93 #define NLMSG_ERROR 0x2 /* Error */ 94 #define NLMSG_DONE 0x3 /* End of a dump */ 95 #define NLMSG_OVERRUN 0x4 /* Data lost */ 96 97 #define NLMSG_MIN_TYPE 0x10 /* < 0x10: reserved control messages */ 98 99 struct nlmsgerr { 100 int error; 101 struct nlmsghdr msg; 102 }; 103 104 #define NETLINK_ADD_MEMBERSHIP 1 105 #define NETLINK_DROP_MEMBERSHIP 2 106 #define NETLINK_PKTINFO 3 107 #define NETLINK_BROADCAST_ERROR 4 108 #define NETLINK_NO_ENOBUFS 5 109 #define NETLINK_RX_RING 6 110 #define NETLINK_TX_RING 7 111 112 struct nl_pktinfo { 113 __u32 group; 114 }; 115 116 struct nl_mmap_req { 117 unsigned int nm_block_size; 118 unsigned int nm_block_nr; 119 unsigned int nm_frame_size; 120 unsigned int nm_frame_nr; 121 }; 122 123 struct nl_mmap_hdr { 124 unsigned int nm_status; 125 unsigned int nm_len; 126 __u32 nm_group; 127 /* credentials */ 128 __u32 nm_pid; 129 __u32 nm_uid; 130 __u32 nm_gid; 131 }; 132 133 enum nl_mmap_status { 134 NL_MMAP_STATUS_UNUSED, 135 NL_MMAP_STATUS_RESERVED, 136 NL_MMAP_STATUS_VALID, 137 NL_MMAP_STATUS_COPY, 138 NL_MMAP_STATUS_SKIP, 139 }; 140 141 #define NL_MMAP_MSG_ALIGNMENT NLMSG_ALIGNTO 142 #define NL_MMAP_MSG_ALIGN(sz) __ALIGN_KERNEL(sz, NL_MMAP_MSG_ALIGNMENT) 143 #define NL_MMAP_HDRLEN NL_MMAP_MSG_ALIGN(sizeof(struct nl_mmap_hdr)) 144 145 #define NET_MAJOR 36 /* Major 36 is reserved for networking */ 146 147 enum { 148 NETLINK_UNCONNECTED = 0, 149 NETLINK_CONNECTED, 150 }; 151 152 /* 153 * <------- NLA_HDRLEN ------> <-- NLA_ALIGN(payload)--> 154 * +---------------------+- - -+- - - - - - - - - -+- - -+ 155 * | Header | Pad | Payload | Pad | 156 * | (struct nlattr) | ing | | ing | 157 * +---------------------+- - -+- - - - - - - - - -+- - -+ 158 * <-------------- nlattr->nla_len --------------> 159 */ 160 161 struct nlattr { 162 __u16 nla_len; 163 __u16 nla_type; 164 }; 165 166 /* 167 * nla_type (16 bits) 168 * +---+---+-------------------------------+ 169 * | N | O | Attribute Type | 170 * +---+---+-------------------------------+ 171 * N := Carries nested attributes 172 * O := Payload stored in network byte order 173 * 174 * Note: The N and O flag are mutually exclusive. 175 */ 176 #define NLA_F_NESTED (1 << 15) 177 #define NLA_F_NET_BYTEORDER (1 << 14) 178 #define NLA_TYPE_MASK ~(NLA_F_NESTED | NLA_F_NET_BYTEORDER) 179 180 #define NLA_ALIGNTO 4 181 #define NLA_ALIGN(len) (((len) + NLA_ALIGNTO - 1) & ~(NLA_ALIGNTO - 1)) 182 #define NLA_HDRLEN ((int) NLA_ALIGN(sizeof(struct nlattr))) 183 184 185 #endif /* _UAPI__LINUX_NETLINK_H */ 186