| 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 | /** |
| 179 | * Netlink error message |
| 180 | * @ingroup msg |
| 181 | */ |
| 182 | struct nlmsgerr |
| 183 | { |
| 184 | /** Error code (errno number) */ |
| 185 | int error; |
| 186 | |
| 187 | /** Original netlink message causing the error */ |
| 188 | struct nlmsghdr msg; |
| 189 | }; |
| 190 | |
| 191 | struct nl_pktinfo |
| 192 | { |
| 193 | __u32 group; |
| 194 | }; |
| 195 | |
| 196 | #endif /* __LINUX_NETLINK_H */ |
| 197 | |
