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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 | #ifndef __LINUX_NETLINK_H #define __LINUX_NETLINK_H #define NETLINK_ROUTE 0 /* Routing/device hook */ #define NETLINK_SKIP 1 /* Reserved for ENskip */ #define NETLINK_USERSOCK 2 /* Reserved for user mode socket protocols */ #define NETLINK_FIREWALL 3 /* Firewalling hook */ #define NETLINK_ARPD 8 #define NETLINK_ROUTE6 11 /* af_inet6 route comm channel */ #define NETLINK_IP6_FW 13 #define NETLINK_TAPBASE 16 /* 16 to 31 are ethertap */ #define MAX_LINKS 32 struct sockaddr_nl { sa_family_t nl_family; /* AF_NETLINK */ unsigned short nl_pad; /* zero */ __kernel_pid_t nl_pid; /* process pid */ unsigned nl_groups; /* multicast groups mask */ }; struct nlmsghdr { __u32 nlmsg_len; /* Length of message including header */ __u16 nlmsg_type; /* Message content */ __u16 nlmsg_flags; /* Additional flags */ __u32 nlmsg_seq; /* Sequence number */ __kernel_pid_t nlmsg_pid; /* Sending process PID */ }; /* Flags values */ #define NLM_F_REQUEST 1 /* It is request message. */ #define NLM_F_MULTI 2 /* Multipart message, terminated by NLMSG_DONE */ #define NLM_F_ACK 4 /* If succeed, reply with ack */ #define NLM_F_ECHO 8 /* Echo this request */ /* Modifiers to GET request */ #define NLM_F_ROOT 0x100 /* specify tree root */ #define NLM_F_MATCH 0x200 /* return all matching */ #define NLM_F_ATOMIC 0x400 /* atomic GET */ #define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH) /* Modifiers to NEW request */ #define NLM_F_REPLACE 0x100 /* Override existing */ #define NLM_F_EXCL 0x200 /* Do not touch, if it exists */ #define NLM_F_CREATE 0x400 /* Create, if it does not exist */ #define NLM_F_APPEND 0x800 /* Add to end of list */ /* 4.4BSD ADD NLM_F_CREATE|NLM_F_EXCL 4.4BSD CHANGE NLM_F_REPLACE True CHANGE NLM_F_CREATE|NLM_F_REPLACE Append NLM_F_CREATE Check NLM_F_EXCL */ #define NLMSG_ALIGNTO 4 #define NLMSG_ALIGN(len) ( ((len)+NLMSG_ALIGNTO-1) & ~(NLMSG_ALIGNTO-1) ) #define NLMSG_LENGTH(len) ((len)+NLMSG_ALIGN(sizeof(struct nlmsghdr))) #define NLMSG_SPACE(len) NLMSG_ALIGN(NLMSG_LENGTH(len)) #define NLMSG_DATA(nlh) ((void*)(((char*)nlh) + NLMSG_LENGTH(0))) #define NLMSG_NEXT(nlh,len) ((len) -= NLMSG_ALIGN((nlh)->nlmsg_len), \ (struct nlmsghdr*)(((char*)(nlh)) + NLMSG_ALIGN((nlh)->nlmsg_len))) #define NLMSG_OK(nlh,len) ((nlh)->nlmsg_len >= sizeof(struct nlmsghdr) && \ (nlh)->nlmsg_len <= (len)) #define NLMSG_PAYLOAD(nlh,len) ((nlh)->nlmsg_len - NLMSG_SPACE((len))) #define NLMSG_NOOP 0x1 /* Nothing. */ #define NLMSG_ERROR 0x2 /* Error */ #define NLMSG_DONE 0x3 /* End of a dump */ #define NLMSG_OVERRUN 0x4 /* Data lost */ struct nlmsgerr { int error; struct nlmsghdr msg; }; #define NET_MAJOR 36 /* Major 36 is reserved for networking */ #ifdef __KERNEL__ struct netlink_skb_parms { struct ucred creds; /* Skb credentials */ pid_t pid; unsigned groups; pid_t dst_pid; unsigned dst_groups; }; #define NETLINK_CB(skb) (*(struct netlink_skb_parms*)&((skb)->cb)) #define NETLINK_CREDS(skb) (&NETLINK_CB((skb)).creds) extern int netlink_attach(int unit, int (*function)(int,struct sk_buff *skb)); extern void netlink_detach(int unit); extern int netlink_post(int unit, struct sk_buff *skb); extern int init_netlink(void); extern struct sock *netlink_kernel_create(int unit, void (*input)(struct sock *sk, int len)); extern void netlink_ack(struct sk_buff *in_skb, struct nlmsghdr *nlh, int err); extern int netlink_unicast(struct sock *ssk, struct sk_buff *skb, pid_t pid, int nonblock); extern void netlink_broadcast(struct sock *ssk, struct sk_buff *skb, pid_t pid, unsigned group, int allocation); extern void netlink_set_err(struct sock *ssk, pid_t pid, unsigned group, int code); /* * skb should fit one page. This choice is good for headerless malloc. * * FIXME: What is the best size for SLAB???? --ANK */ #define NLMSG_GOODSIZE (PAGE_SIZE - ((sizeof(struct sk_buff)+0xF)&~0xF)) struct netlink_callback { struct sk_buff *skb; struct nlmsghdr *nlh; int (*dump)(struct sk_buff * skb, struct netlink_callback *cb); int (*done)(struct netlink_callback *cb); int family; long args[4]; }; #if 0 void* nlmsg_broadcast(struct sock*, unsigned long type, int len, unsigned groups); struct skb_buff *nlmsg_alloc(unsigned long type, int len, unsigned long seq, unsigned long pid, int allocation); void __nlmsg_transmit(struct sock*, int allocation); extern __inline__ void nlmsg_release(struct sk_buff *skb) { atomic_dec(skb->users); } extern __inline__ void nlmsg_transmit(struct sk_buff *sk, int allocation) { if (sk->write_queue.qlen) __nlmsg_transmit(sk, allocation); } #endif extern __inline__ struct nlmsghdr * __nlmsg_put(struct sk_buff *skb, pid_t pid, u32 seq, int type, int len) { struct nlmsghdr *nlh; int size = NLMSG_LENGTH(len); nlh = (struct nlmsghdr*)skb_put(skb, NLMSG_ALIGN(size)); nlh->nlmsg_type = type; nlh->nlmsg_len = size; nlh->nlmsg_flags = 0; nlh->nlmsg_pid = pid; nlh->nlmsg_seq = seq; return nlh; } #define NLMSG_PUT(skb, pid, seq, type, len) \ ({ if (skb_tailroom(skb) < (int)NLMSG_SPACE(len)) goto nlmsg_failure; \ __nlmsg_put(skb, pid, seq, type, len); }) extern int netlink_dump_start(struct sock *ssk, struct sk_buff *skb, struct nlmsghdr *nlh, int (*dump)(struct sk_buff *skb, struct netlink_callback*), int (*done)(struct netlink_callback*)); extern void netlink_proto_init(struct net_proto *pro); #endif /* __KERNEL__ */ #endif /* __LINUX_NETLINK_H */ |