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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | #ifndef __LINUX_NETLINK_H |
| 2 | #define __LINUX_NETLINK_H |
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| 3 | |||
| 4 | #include <linux/socket.h> /* for sa_family_t */ |
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| 5 | #include <linux/types.h> |
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| 6 | |||
| 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_ARPD 8 |
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| 15 | #define NETLINK_ROUTE6 11 /* af_inet6 route comm channel */ |
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| 16 | #define NETLINK_IP6_FW 13 |
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| 17 | #define NETLINK_DNRTMSG 14 /* DECnet routing messages */ |
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| 18 | #define NETLINK_TAPBASE 16 /* 16 to 31 are ethertap */ |
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| 19 | |||
| 20 | #define MAX_LINKS 32 |
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| 21 | |||
| 22 | struct sockaddr_nl |
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| 23 | { |
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| 24 | sa_family_t nl_family; /* AF_NETLINK */ |
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| 25 | unsigned short nl_pad; /* zero */ |
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| 26 | __u32 nl_pid; /* process pid */ |
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| 27 | __u32 nl_groups; /* multicast groups mask */ |
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| 28 | }; |
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| 29 | |||
| 30 | struct nlmsghdr |
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| 31 | { |
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| 32 | __u32 nlmsg_len; /* Length of message including header */ |
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| 33 | __u16 nlmsg_type; /* Message content */ |
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| 34 | __u16 nlmsg_flags; /* Additional flags */ |
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| 35 | __u32 nlmsg_seq; /* Sequence number */ |
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| 36 | __u32 nlmsg_pid; /* Sending process PID */ |
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| 37 | }; |
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| 38 | |||
| 39 | /* Flags values */ |
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| 40 | |||
| 41 | #define NLM_F_REQUEST 1 /* It is request message. */ |
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| 42 | #define NLM_F_MULTI 2 /* Multipart message, terminated by NLMSG_DONE */ |
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| 43 | #define NLM_F_ACK 4 /* Reply with ack, with zero or error code */ |
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| 44 | #define NLM_F_ECHO 8 /* Echo this request */ |
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| 45 | |||
| 46 | /* Modifiers to GET request */ |
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| 47 | #define NLM_F_ROOT 0x100 /* specify tree root */ |
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| 48 | #define NLM_F_MATCH 0x200 /* return all matching */ |
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| 49 | #define NLM_F_ATOMIC 0x400 /* atomic GET */ |
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| 50 | #define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH) |
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| 51 | |||
| 52 | /* Modifiers to NEW request */ |
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| 53 | #define NLM_F_REPLACE 0x100 /* Override existing */ |
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| 54 | #define NLM_F_EXCL 0x200 /* Do not touch, if it exists */ |
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| 55 | #define NLM_F_CREATE 0x400 /* Create, if it does not exist */ |
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| 56 | #define NLM_F_APPEND 0x800 /* Add to end of list */ |
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| 57 | |||
| 58 | /* |
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| 59 | 4.4BSD ADD NLM_F_CREATE|NLM_F_EXCL |
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| 60 | 4.4BSD CHANGE NLM_F_REPLACE |
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| 61 | |||
| 62 | True CHANGE NLM_F_CREATE|NLM_F_REPLACE |
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| 63 | Append NLM_F_CREATE |
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| 64 | Check NLM_F_EXCL |
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| 65 | */ |
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| 66 | |||
| 67 | #define NLMSG_ALIGNTO 4 |
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| 68 | #define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) ) |
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| 69 | #define NLMSG_LENGTH(len) ((len)+NLMSG_ALIGN(sizeof(struct nlmsghdr))) |
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| 70 | #define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len)) |
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| 71 | #define NLMSG_DATA(nlh) ((void*)(((char*)nlh) + NLMSG_LENGTH(0))) |
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| 72 | #define NLMSG_NEXT(nlh,len) ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \ |
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| 73 | (struct nlmsghdr*)(((char*)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len))) |
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| 74 | #define NLMSG_OK(nlh,len) ((len) > 0 && (nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \ |
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| 75 | (nlh)->nlmsg_len <= (len)) |
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| 76 | #define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len))) |
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| 77 | |||
| 78 | #define NLMSG_NOOP 0x1 /* Nothing. */ |
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| 79 | #define NLMSG_ERROR 0x2 /* Error */ |
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| 80 | #define NLMSG_DONE 0x3 /* End of a dump */ |
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| 81 | #define NLMSG_OVERRUN 0x4 /* Data lost */ |
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| 82 | |||
| 83 | struct nlmsgerr |
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| 84 | { |
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| 85 | int error; |
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| 86 | struct nlmsghdr msg; |
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| 87 | }; |
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| 88 | |||
| 89 | #define NET_MAJOR 36 /* Major 36 is reserved for networking */ |
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| 90 | |||
| 91 | #ifdef __KERNEL__ |
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| 92 | |||
| 93 | #include <linux/capability.h> |
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| 94 | |||
| 95 | struct netlink_skb_parms |
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| 96 | { |
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| 97 | struct ucred creds; /* Skb credentials */ |
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| 98 | __u32 pid; |
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| 99 | __u32 groups; |
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| 100 | __u32 dst_pid; |
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| 101 | __u32 dst_groups; |
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| 102 | kernel_cap_t eff_cap; |
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| 103 | }; |
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| 104 | |||
| 105 | #define NETLINK_CB(skb) (*(struct netlink_skb_parms*)&((skb)->cb)) |
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| 106 | #define NETLINK_CREDS(skb) (&NETLINK_CB((skb)).creds) |
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| 107 | |||
| 108 | |||
| 109 | extern int netlink_attach(int unit, int (*function)(int,struct sk_buff *skb)); |
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| 110 | extern void netlink_detach(int unit); |
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| 111 | extern int netlink_post(int unit, struct sk_buff *skb); |
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| 112 | extern struct sock *netlink_kernel_create(int unit, void (*input)(struct sock *sk, int len)); |
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| 113 | extern void netlink_ack(struct sk_buff *in_skb, struct nlmsghdr *nlh, int err); |
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| 114 | extern int netlink_unicast(struct sock *ssk, struct sk_buff *skb, __u32 pid, int nonblock); |
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| 115 | extern int netlink_broadcast(struct sock *ssk, struct sk_buff *skb, __u32 pid, |
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| 116 | __u32 group, int allocation); |
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| 117 | extern void netlink_set_err(struct sock *ssk, __u32 pid, __u32 group, int code); |
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| 118 | extern int netlink_register_notifier(struct notifier_block *nb); |
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| 119 | extern int netlink_unregister_notifier(struct notifier_block *nb); |
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| 120 | |||
| 121 | /* |
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| 122 | * skb should fit one page. This choice is good for headerless malloc. |
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| 123 | * |
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| 124 | * FIXME: What is the best size for SLAB???? --ANK |
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| 125 | */ |
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| 126 | #define NLMSG_GOODSIZE (PAGE_SIZE - ((sizeof(struct sk_buff)+0xF)&~0xF)) |
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| 127 | |||
| 128 | |||
| 129 | struct netlink_callback |
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| 130 | { |
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| 131 | struct sk_buff *skb; |
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| 132 | struct nlmsghdr *nlh; |
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| 133 | int (*dump)(struct sk_buff * skb, struct netlink_callback *cb); |
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| 134 | int (*done)(struct netlink_callback *cb); |
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| 135 | int family; |
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| 136 | long args[4]; |
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| 137 | }; |
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| 138 | |||
| 139 | struct netlink_notify |
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| 140 | { |
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| 141 | int pid; |
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| 142 | int protocol; |
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| 143 | }; |
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| 144 | |||
| 145 | static __inline__ struct nlmsghdr * |
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| 146 | __nlmsg_put(struct sk_buff *skb, u32 pid, u32 seq, int type, int len) |
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| 147 | { |
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| 148 | struct nlmsghdr *nlh; |
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| 149 | int size = NLMSG_LENGTH(len); |
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| 150 | |||
| 151 | nlh = (struct nlmsghdr*)skb_put(skb, NLMSG_ALIGN(size)); |
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| 152 | nlh->nlmsg_type = type; |
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| 153 | nlh->nlmsg_len = size; |
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| 154 | nlh->nlmsg_flags = 0; |
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| 155 | nlh->nlmsg_pid = pid; |
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| 156 | nlh->nlmsg_seq = seq; |
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| 157 | return nlh; |
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| 158 | } |
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| 159 | |||
| 160 | #define NLMSG_PUT(skb, pid, seq, type, len) \ |
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| 161 | ({ if (skb_tailroom(skb) < (int)NLMSG_SPACE(len)) goto nlmsg_failure; \ |
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| 162 | __nlmsg_put(skb, pid, seq, type, len); }) |
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| 163 | |||
| 164 | extern int netlink_dump_start(struct sock *ssk, struct sk_buff *skb, |
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| 165 | struct nlmsghdr *nlh, |
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| 166 | int (*dump)(struct sk_buff *skb, struct netlink_callback*), |
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| 167 | int (*done)(struct netlink_callback*)); |
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| 168 | |||
| 169 | |||
| 170 | #define NL_NONROOT_RECV 0x1 |
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| 171 | #define NL_NONROOT_SEND 0x2 |
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| 172 | extern void netlink_set_nonroot(int protocol, unsigned flag); |
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| 173 | |||
| 174 | #endif /* __KERNEL__ */ |
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| 175 | |||
| 176 | #endif /* __LINUX_NETLINK_H */ |