entered into RCS

1 files changed, 130 insertions, 0 deletions

diff --git a/pfinet/linux-inet/ip.h b/pfinet/linux-inet/ip.h
new file mode 100644
index 00000000..95954a8c
--- /dev/null
+++ b/pfinet/linux-inet/ip.h
@@ -0,0 +1,130 @@
+/*
+ * INET		An implementation of the TCP/IP protocol suite for the LINUX
+ *		operating system.  INET is implemented using the  BSD Socket
+ *		interface as the means of communication with the user level.
+ *
+ *		Definitions for the IP module.
+ *
+ * Version:	@(#)ip.h	1.0.2	05/07/93
+ *
+ * Authors:	Ross Biro, <bir7@leland.Stanford.Edu>
+ *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ *		Alan Cox, <gw4pts@gw4pts.ampr.org>
+ *
+ *		This program is free software; you can redistribute it and/or
+ *		modify it under the terms of the GNU General Public License
+ *		as published by the Free Software Foundation; either version
+ *		2 of the License, or (at your option) any later version.
+ */
+#ifndef _IP_H
+#define _IP_H
+
+
+#include <linux/ip.h>
+#include <linux/config.h>
+
+#ifndef _SNMP_H
+#include "snmp.h"
+#endif
+
+#include "sock.h"	/* struct sock */
+
+/* IP flags. */
+#define IP_CE		0x8000		/* Flag: "Congestion"		*/
+#define IP_DF		0x4000		/* Flag: "Don't Fragment"	*/
+#define IP_MF		0x2000		/* Flag: "More Fragments"	*/
+#define IP_OFFSET	0x1FFF		/* "Fragment Offset" part	*/
+
+#define IP_FRAG_TIME	(30 * HZ)		/* fragment lifetime	*/
+
+#ifdef CONFIG_IP_MULTICAST
+extern void		ip_mc_dropsocket(struct sock *);
+extern void		ip_mc_dropdevice(struct device *dev);
+extern int		ip_mc_procinfo(char *, char **, off_t, int);
+#define MULTICAST(x)	(IN_MULTICAST(htonl(x)))
+#endif
+ 
+
+/* Describe an IP fragment. */
+struct ipfrag {
+  int		offset;		/* offset of fragment in IP datagram	*/
+  int		end;		/* last byte of data in datagram	*/
+  int		len;		/* length of this fragment		*/
+  struct sk_buff *skb;			/* complete received fragment		*/
+  unsigned char		*ptr;		/* pointer into real fragment data	*/
+  struct ipfrag		*next;		/* linked list pointers			*/
+  struct ipfrag		*prev;
+};
+
+/* Describe an entry in the "incomplete datagrams" queue. */
+struct ipq	 {
+  unsigned char		*mac;		/* pointer to MAC header		*/
+  struct iphdr	*iph;		/* pointer to IP header			*/
+  int		len;		/* total length of original datagram	*/
+  short			ihlen;		/* length of the IP header		*/
+  short 	maclen;		/* length of the MAC header		*/
+  struct timer_list timer;	/* when will this queue expire?		*/
+  struct ipfrag		*fragments;	/* linked list of received fragments	*/
+  struct ipq	*next;		/* linked list pointers			*/
+  struct ipq	*prev;
+  struct device *dev;		/* Device - for icmp replies */
+};
+
+
+extern int		backoff(int n);
+
+extern void		ip_print(const struct iphdr *ip);
+extern int		ip_ioctl(struct sock *sk, int cmd,
+				 unsigned long arg);
+extern void		ip_route_check(unsigned long daddr);
+extern int		ip_build_header(struct sk_buff *skb,
+					unsigned long saddr,
+					unsigned long daddr,
+					struct device **dev, int type,
+					struct options *opt, int len,
+					int tos,int ttl);
+extern unsigned short	ip_compute_csum(unsigned char * buff, int len);
+extern int		ip_rcv(struct sk_buff *skb, struct device *dev,
+			       struct packet_type *pt);
+extern void		ip_send_check(struct iphdr *ip);
+extern int		ip_id_count;			  
+extern void		ip_queue_xmit(struct sock *sk,
+				      struct device *dev, struct sk_buff *skb,
+				      int free);
+extern int 		ip_setsockopt(struct sock *sk, int level, int optname, char *optval, int optlen);
+extern int 		ip_getsockopt(struct sock *sk, int level, int optname, char *optval, int *optlen);
+extern void		ip_init(void);
+
+extern struct ip_mib	ip_statistics;
+
+/*
+ *	This is a version of ip_compute_csum() optimized for IP headers, which
+ *	always checksum on 4 octet boundaries.
+ *	Used by ip.c and slhc.c (the net driver module)
+ *	(Moved to here by bj0rn@blox.se)
+ */
+
+static inline unsigned short ip_fast_csum(unsigned char * buff, int wlen)
+{
+	unsigned long sum = 0;
+
+	if (wlen)
+	{
+	unsigned long bogus;
+	 __asm__("clc\n"
+		"1:\t"
+		"lodsl\n\t"
+		"adcl %3, %0\n\t"
+		"decl %2\n\t"
+		"jne 1b\n\t"
+		"adcl $0, %0\n\t"
+		"movl %0, %3\n\t"
+		"shrl $16, %3\n\t"
+		"addw %w3, %w0\n\t"
+		"adcw $0, %w0"
+	    : "=r" (sum), "=S" (buff), "=r" (wlen), "=a" (bogus)
+	    : "0"  (sum),  "1" (buff),  "2" (wlen));
+	}
+	return (~sum) & 0xffff;
+}
+#endif	/* _IP_H */