| 1 | #ifndef __LINUX_NETLINK_H |
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| 2 | #define __LINUX_NETLINK_H |
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| 3 | |
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| 4 | #include <sys/socket.h> /* for sa_family_t */ |
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| 5 | #include <linux/types.h> |
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| 6 | |
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| 7 | #define NETLINK_ROUTE 0 /* Routing/device hook */ |
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| 8 | #define NETLINK_SKIP 1 /* Reserved for ENskip */ |
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| 9 | #define NETLINK_USERSOCK 2 /* Reserved for user mode socket protocols */ |
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| 10 | #define NETLINK_FIREWALL 3 /* Firewalling hook */ |
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| 11 | #define NETLINK_TCPDIAG 4 /* TCP socket monitoring */ |
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| 12 | #define NETLINK_NFLOG 5 /* netfilter/iptables ULOG */ |
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| 13 | #define NETLINK_XFRM 6 /* ipsec */ |
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| 14 | #define NETLINK_SELINUX 7 /* SELinux event notifications */ |
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| 15 | #define NETLINK_ARPD 8 |
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| 16 | #define NETLINK_AUDIT 9 /* auditing */ |
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| 17 | #define NETLINK_ROUTE6 11 /* af_inet6 route comm channel */ |
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| 18 | #define NETLINK_IP6_FW 13 |
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| 19 | #define NETLINK_DNRTMSG 14 /* DECnet routing messages */ |
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| 20 | #define NETLINK_KOBJECT_UEVENT 15 /* Kernel messages to userspace */ |
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| 21 | #define NETLINK_TAPBASE 16 /* 16 to 31 are ethertap */ |
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| 22 | |
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| 23 | #define MAX_LINKS 32 |
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| 24 | |
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| 25 | struct sockaddr_nl |
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| 26 | { |
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| 27 | sa_family_t nl_family; /* AF_NETLINK */ |
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| 28 | unsigned short nl_pad; /* zero */ |
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| 29 | __u32 nl_pid; /* process pid */ |
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| 30 | __u32 nl_groups; /* multicast groups mask */ |
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| 31 | }; |
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| 32 | |
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| 33 | struct nlmsghdr |
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| 34 | { |
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| 35 | __u32 nlmsg_len; /* Length of message including header */ |
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| 36 | __u16 nlmsg_type; /* Message content */ |
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| 37 | __u16 nlmsg_flags; /* Additional flags */ |
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| 38 | __u32 nlmsg_seq; /* Sequence number */ |
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| 39 | __u32 nlmsg_pid; /* Sending process PID */ |
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| 40 | }; |
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| 41 | |
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| 42 | /* Flags values */ |
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| 43 | |
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| 44 | #define NLM_F_REQUEST 1 /* It is request message. */ |
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| 45 | #define NLM_F_MULTI 2 /* Multipart message, terminated by NLMSG_DONE */ |
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| 46 | #define NLM_F_ACK 4 /* Reply with ack, with zero or error code */ |
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| 47 | #define NLM_F_ECHO 8 /* Echo this request */ |
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| 48 | |
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| 49 | /* Modifiers to GET request */ |
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| 50 | #define NLM_F_ROOT 0x100 /* specify tree root */ |
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| 51 | #define NLM_F_MATCH 0x200 /* return all matching */ |
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| 52 | #define NLM_F_ATOMIC 0x400 /* atomic GET */ |
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| 53 | #define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH) |
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| 54 | |
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| 55 | /* Modifiers to NEW request */ |
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| 56 | #define NLM_F_REPLACE 0x100 /* Override existing */ |
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| 57 | #define NLM_F_EXCL 0x200 /* Do not touch, if it exists */ |
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| 58 | #define NLM_F_CREATE 0x400 /* Create, if it does not exist */ |
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| 59 | #define NLM_F_APPEND 0x800 /* Add to end of list */ |
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| 60 | |
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| 61 | |
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| 62 | /* |
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| 63 | 4.4BSD ADD NLM_F_CREATE|NLM_F_EXCL |
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| 64 | 4.4BSD CHANGE NLM_F_REPLACE |
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| 65 | |
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| 66 | True CHANGE NLM_F_CREATE|NLM_F_REPLACE |
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| 67 | Append NLM_F_CREATE |
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| 68 | Check NLM_F_EXCL |
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| 69 | */ |
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| 70 | |
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| 71 | #define NLMSG_ALIGNTO 4 |
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| 72 | #define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) ) |
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| 73 | #define NLMSG_LENGTH(len) ((len)+NLMSG_ALIGN(sizeof(struct nlmsghdr))) |
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| 74 | #define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len)) |
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| 75 | #define NLMSG_DATA(nlh) ((void*)(((char*)nlh) + NLMSG_LENGTH(0))) |
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| 76 | #define NLMSG_NEXT(nlh,len) ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \ |
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| 77 | (struct nlmsghdr*)(((char*)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len))) |
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| 78 | #define NLMSG_OK(nlh,len) ((len) >= (int)sizeof(struct nlmsghdr) && \ |
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| 79 | (nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \ |
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| 80 | (nlh)->nlmsg_len <= (len)) |
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| 81 | #define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len))) |
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| 82 | |
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| 83 | #define NLMSG_NOOP 0x1 /* Nothing. */ |
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| 84 | #define NLMSG_ERROR 0x2 /* Error */ |
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| 85 | #define NLMSG_DONE 0x3 /* End of a dump */ |
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| 86 | #define NLMSG_OVERRUN 0x4 /* Data lost */ |
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| 87 | |
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| 88 | struct nlmsgerr |
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| 89 | { |
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| 90 | int error; |
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| 91 | struct nlmsghdr msg; |
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| 92 | }; |
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| 93 | |
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| 94 | #define NET_MAJOR 36 /* Major 36 is reserved for networking */ |
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| 95 | |
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| 96 | enum { |
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| 97 | NETLINK_UNCONNECTED = 0, |
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| 98 | NETLINK_CONNECTED |
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| 99 | }; |
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| 100 | |
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| 101 | #endif /* __LINUX_NETLINK_H */ |
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