1 #ifndef __LINUX_NETLINK_H 2 #define __LINUX_NETLINK_H 3 4 /** 5 * Netlink socket address 6 * @ingroup nl 7 */ 8 struct sockaddr_nl 9 { 10 /** socket family (AF_NETLINK) */ 11 sa_family_t nl_family; 12 13 /** Padding (unused) */ 14 unsigned short nl_pad; 15 16 /** Unique process ID */ 17 uint32_t nl_pid; 18 19 /** Multicast group subscriptions */ 20 uint32_t nl_groups; 21 }; 22 23 /** 24 * Netlink message header 25 * @ingroup msg 26 */ 27 struct nlmsghdr 28 { 29 /** 30 * Length of message including header. 31 */ 32 uint32_t nlmsg_len; 33 34 /** 35 * Message type (content type) 36 */ 37 uint16_t nlmsg_type; 38 39 /** 40 * Message flags 41 */ 42 uint16_t nlmsg_flags; 43 44 /** 45 * Sequence number 46 */ 47 uint32_t nlmsg_seq; 48 49 /** 50 * Netlink PID of the proccess sending the message. 51 */ 52 uint32_t nlmsg_pid; 53 }; 54 55 /** 56 * @name Standard message flags 57 * @{ 58 */ 59 60 /** 61 * Must be set on all request messages (typically from user space to 62 * kernel space). 63 * @ingroup msg 64 */ 65 #define NLM_F_REQUEST 1 66 67 /** 68 * Indicates the message is part of a multipart message terminated 69 * by NLMSG_DONE. 70 */ 71 #define NLM_F_MULTI 2 72 73 /** 74 * Request for an acknowledgment on success. 75 */ 76 #define NLM_F_ACK 4 77 78 /** 79 * Echo this request 80 */ 81 #define NLM_F_ECHO 8 82 83 /** @} */ 84 85 /** 86 * @name Additional message flags for GET requests 87 * @{ 88 */ 89 90 /** 91 * Return the complete table instead of a single entry. 92 * @ingroup msg 93 */ 94 #define NLM_F_ROOT 0x100 95 96 /** 97 * Return all entries matching criteria passed in message content. 98 */ 99 #define NLM_F_MATCH 0x200 100 101 /** 102 * Return an atomic snapshot of the table being referenced. This 103 * may require special privileges because it has the potential to 104 * interrupt service in the FE for a longer time. 105 */ 106 #define NLM_F_ATOMIC 0x400 107 108 /** 109 * Dump all entries 110 */ 111 #define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH) 112 113 /** @} */ 114 115 /** 116 * @name Additional messsage flags for NEW requests 117 * @{ 118 */ 119 120 /** 121 * Replace existing matching config object with this request. 122 * @ingroup msg 123 */ 124 #define NLM_F_REPLACE 0x100 125 126 /** 127 * Don't replace the config object if it already exists. 128 */ 129 #define NLM_F_EXCL 0x200 130 131 /** 132 * Create config object if it doesn't already exist. 133 */ 134 #define NLM_F_CREATE 0x400 135 136 /** 137 * Add to the end of the object list. 138 */ 139 #define NLM_F_APPEND 0x800 140 141 /** @} */ 142 143 /** 144 * @name Standard Message types 145 * @{ 146 */ 147 148 /** 149 * No operation, message must be ignored 150 * @ingroup msg 151 */ 152 #define NLMSG_NOOP 0x1 153 154 /** 155 * The message signals an error and the payload contains a nlmsgerr 156 * structure. This can be looked at as a NACK and typically it is 157 * from FEC to CPC. 158 */ 159 #define NLMSG_ERROR 0x2 160 161 /** 162 * Message terminates a multipart message. 163 */ 164 #define NLMSG_DONE 0x3 165 166 /** 167 * The message signals that data got lost 168 */ 169 #define NLMSG_OVERRUN 0x4 170 171 /** 172 * Lower limit of reserved message types 173 */ 174 #define NLMSG_MIN_TYPE 0x10 175 176 /** @} */ 177 178 #define NLA_F_NESTED (1 << 15) 179 180 /** 181 * Netlink error message 182 * @ingroup msg 183 */ 184 struct nlmsgerr 185 { 186 /** Error code (errno number) */ 187 int error; 188 189 /** Original netlink message causing the error */ 190 struct nlmsghdr msg; 191 }; 192 193 struct nl_pktinfo 194 { 195 __u32 group; 196 }; 197 198 #endif /* __LINUX_NETLINK_H */ 199
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