patch-2.1.68 linux/include/linux/netlink.h

• Lines: 185
• Date: Sun Nov 30 14:00:38 1997
• Orig file: v2.1.67/linux/include/linux/netlink.h
• Orig date: Thu Dec 12 06:54:20 1996

diff -u --recursive --new-file v2.1.67/linux/include/linux/netlink.h linux/include/linux/netlink.h
@@ -1,20 +1,174 @@
 #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
 {
-	unsigned long	nlmsg_len;	/* Length of message including header */
-	unsigned long	nlmsg_type;	/* Message type */
-	unsigned long	nlmsg_seq;	/* Sequence number */
-	unsigned long	nlmsg_pid;	/* Sending process PID */
-	unsigned char	nlmsg_data[0];
+	__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	*/
+
+/*
+   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_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 NLMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )
+#define NETLINK_CB(skb)		(*(struct netlink_skb_parms*)&((skb)->cb))
+#define NETLINK_CREDS(skb)	(&NETLINK_CB((skb)).creds)
 
-#define NLMSG_ACK		0x01	/* int - error code */
-#define NLMSG_OVERRUN		0x02	/* unsigned long[2] - start and end
-					 * of lost message sequence numbers.
-					 */
+
+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);
+	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) < 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 */