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 #define NETLINK_SMC 22 /* SMC monitoring */ 31 32 #define NETLINK_INET_DIAG NETLINK_SOCK_DIAG 33 34 #define MAX_LINKS 32 35 36 struct sockaddr_nl { 37 __kernel_sa_family_t nl_family; /* AF_NETLINK */ 38 unsigned short nl_pad; /* zero */ 39 __u32 nl_pid; /* port ID */ 40 __u32 nl_groups; /* multicast groups mask */ 41 }; 42 43 struct nlmsghdr { 44 __u32 nlmsg_len; /* Length of message including header */ 45 __u16 nlmsg_type; /* Message content */ 46 __u16 nlmsg_flags; /* Additional flags */ 47 __u32 nlmsg_seq; /* Sequence number */ 48 __u32 nlmsg_pid; /* Sending process port ID */ 49 }; 50 51 /* Flags values */ 52 53 #define NLM_F_REQUEST 0x01 /* It is request message. */ 54 #define NLM_F_MULTI 0x02 /* Multipart message, terminated by NLMSG_DONE */ 55 #define NLM_F_ACK 0x04 /* Reply with ack, with zero or error code */ 56 #define NLM_F_ECHO 0x08 /* Echo this request */ 57 #define NLM_F_DUMP_INTR 0x10 /* Dump was inconsistent due to sequence change */ 58 #define NLM_F_DUMP_FILTERED 0x20 /* Dump was filtered as requested */ 59 60 /* Modifiers to GET request */ 61 #define NLM_F_ROOT 0x100 /* specify tree root */ 62 #define NLM_F_MATCH 0x200 /* return all matching */ 63 #define NLM_F_ATOMIC 0x400 /* atomic GET */ 64 #define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH) 65 66 /* Modifiers to NEW request */ 67 #define NLM_F_REPLACE 0x100 /* Override existing */ 68 #define NLM_F_EXCL 0x200 /* Do not touch, if it exists */ 69 #define NLM_F_CREATE 0x400 /* Create, if it does not exist */ 70 #define NLM_F_APPEND 0x800 /* Add to end of list */ 71 72 /* Flags for ACK message */ 73 #define NLM_F_CAPPED 0x100 /* request was capped */ 74 #define NLM_F_ACK_TLVS 0x200 /* extended ACK TVLs were included */ 75 76 /* 77 4.4BSD ADD NLM_F_CREATE|NLM_F_EXCL 78 4.4BSD CHANGE NLM_F_REPLACE 79 80 True CHANGE NLM_F_CREATE|NLM_F_REPLACE 81 Append NLM_F_CREATE 82 Check NLM_F_EXCL 83 */ 84 85 #define NLMSG_ALIGNTO 4U 86 #define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) ) 87 #define NLMSG_HDRLEN ((int) NLMSG_ALIGN(sizeof(struct nlmsghdr))) 88 #define NLMSG_LENGTH(len) ((len) + NLMSG_HDRLEN) 89 #define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len)) 90 #define NLMSG_DATA(nlh) ((void*)(((char*)nlh) + NLMSG_LENGTH(0))) 91 #define NLMSG_NEXT(nlh,len) ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \ 92 (struct nlmsghdr*)(((char*)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len))) 93 #define NLMSG_OK(nlh,len) ((len) >= (int)sizeof(struct nlmsghdr) && \ 94 (nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \ 95 (nlh)->nlmsg_len <= (len)) 96 #define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len))) 97 98 #define NLMSG_NOOP 0x1 /* Nothing. */ 99 #define NLMSG_ERROR 0x2 /* Error */ 100 #define NLMSG_DONE 0x3 /* End of a dump */ 101 #define NLMSG_OVERRUN 0x4 /* Data lost */ 102 103 #define NLMSG_MIN_TYPE 0x10 /* < 0x10: reserved control messages */ 104 105 struct nlmsgerr { 106 int error; 107 struct nlmsghdr msg; 108 /* 109 * followed by the message contents unless NETLINK_CAP_ACK was set 110 * or the ACK indicates success (error == 0) 111 * message length is aligned with NLMSG_ALIGN() 112 */ 113 /* 114 * followed by TLVs defined in enum nlmsgerr_attrs 115 * if NETLINK_EXT_ACK was set 116 */ 117 }; 118 119 /** 120 * enum nlmsgerr_attrs - nlmsgerr attributes 121 * @NLMSGERR_ATTR_UNUSED: unused 122 * @NLMSGERR_ATTR_MSG: error message string (string) 123 * @NLMSGERR_ATTR_OFFS: offset of the invalid attribute in the original 124 * message, counting from the beginning of the header (u32) 125 * @NLMSGERR_ATTR_COOKIE: arbitrary subsystem specific cookie to 126 * be used - in the success case - to identify a created 127 * object or operation or similar (binary) 128 * @__NLMSGERR_ATTR_MAX: number of attributes 129 * @NLMSGERR_ATTR_MAX: highest attribute number 130 */ 131 enum nlmsgerr_attrs { 132 NLMSGERR_ATTR_UNUSED, 133 NLMSGERR_ATTR_MSG, 134 NLMSGERR_ATTR_OFFS, 135 NLMSGERR_ATTR_COOKIE, 136 137 __NLMSGERR_ATTR_MAX, 138 NLMSGERR_ATTR_MAX = __NLMSGERR_ATTR_MAX - 1 139 }; 140 141 #define NETLINK_ADD_MEMBERSHIP 1 142 #define NETLINK_DROP_MEMBERSHIP 2 143 #define NETLINK_PKTINFO 3 144 #define NETLINK_BROADCAST_ERROR 4 145 #define NETLINK_NO_ENOBUFS 5 146 #ifndef __KERNEL__ 147 #define NETLINK_RX_RING 6 148 #define NETLINK_TX_RING 7 149 #endif 150 #define NETLINK_LISTEN_ALL_NSID 8 151 #define NETLINK_LIST_MEMBERSHIPS 9 152 #define NETLINK_CAP_ACK 10 153 #define NETLINK_EXT_ACK 11 154 155 struct nl_pktinfo { 156 __u32 group; 157 }; 158 159 struct nl_mmap_req { 160 unsigned int nm_block_size; 161 unsigned int nm_block_nr; 162 unsigned int nm_frame_size; 163 unsigned int nm_frame_nr; 164 }; 165 166 struct nl_mmap_hdr { 167 unsigned int nm_status; 168 unsigned int nm_len; 169 __u32 nm_group; 170 /* credentials */ 171 __u32 nm_pid; 172 __u32 nm_uid; 173 __u32 nm_gid; 174 }; 175 176 #ifndef __KERNEL__ 177 enum nl_mmap_status { 178 NL_MMAP_STATUS_UNUSED, 179 NL_MMAP_STATUS_RESERVED, 180 NL_MMAP_STATUS_VALID, 181 NL_MMAP_STATUS_COPY, 182 NL_MMAP_STATUS_SKIP, 183 }; 184 185 #define NL_MMAP_MSG_ALIGNMENT NLMSG_ALIGNTO 186 #define NL_MMAP_MSG_ALIGN(sz) __ALIGN_KERNEL(sz, NL_MMAP_MSG_ALIGNMENT) 187 #define NL_MMAP_HDRLEN NL_MMAP_MSG_ALIGN(sizeof(struct nl_mmap_hdr)) 188 #endif 189 190 #define NET_MAJOR 36 /* Major 36 is reserved for networking */ 191 192 enum { 193 NETLINK_UNCONNECTED = 0, 194 NETLINK_CONNECTED, 195 }; 196 197 /* 198 * <------- NLA_HDRLEN ------> <-- NLA_ALIGN(payload)--> 199 * +---------------------+- - -+- - - - - - - - - -+- - -+ 200 * | Header | Pad | Payload | Pad | 201 * | (struct nlattr) | ing | | ing | 202 * +---------------------+- - -+- - - - - - - - - -+- - -+ 203 * <-------------- nlattr->nla_len --------------> 204 */ 205 206 struct nlattr { 207 __u16 nla_len; 208 __u16 nla_type; 209 }; 210 211 /* 212 * nla_type (16 bits) 213 * +---+---+-------------------------------+ 214 * | N | O | Attribute Type | 215 * +---+---+-------------------------------+ 216 * N := Carries nested attributes 217 * O := Payload stored in network byte order 218 * 219 * Note: The N and O flag are mutually exclusive. 220 */ 221 #define NLA_F_NESTED (1 << 15) 222 #define NLA_F_NET_BYTEORDER (1 << 14) 223 #define NLA_TYPE_MASK ~(NLA_F_NESTED | NLA_F_NET_BYTEORDER) 224 225 #define NLA_ALIGNTO 4 226 #define NLA_ALIGN(len) (((len) + NLA_ALIGNTO - 1) & ~(NLA_ALIGNTO - 1)) 227 #define NLA_HDRLEN ((int) NLA_ALIGN(sizeof(struct nlattr))) 228 229 /* Generic 32 bitflags attribute content sent to the kernel. 230 * 231 * The value is a bitmap that defines the values being set 232 * The selector is a bitmask that defines which value is legit 233 * 234 * Examples: 235 * value = 0x0, and selector = 0x1 236 * implies we are selecting bit 1 and we want to set its value to 0. 237 * 238 * value = 0x2, and selector = 0x2 239 * implies we are selecting bit 2 and we want to set its value to 1. 240 * 241 */ 242 struct nla_bitfield32 { 243 __u32 value; 244 __u32 selector; 245 }; 246 247 #endif /* _UAPI__LINUX_NETLINK_H */ 248