entered into RCS

1 files changed, 142 insertions, 0 deletions

diff --git a/pfinet/linux-inet/tcp.h b/pfinet/linux-inet/tcp.h
new file mode 100644
index 00000000..016fa6dd
--- /dev/null
+++ b/pfinet/linux-inet/tcp.h
@@ -0,0 +1,142 @@
+/*
+ * 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 TCP module.
+ *
+ * Version:	@(#)tcp.h	1.0.5	05/23/93
+ *
+ * Authors:	Ross Biro, <bir7@leland.Stanford.Edu>
+ *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.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 _TCP_H
+#define _TCP_H
+
+#include <linux/tcp.h>
+
+#define MAX_SYN_SIZE	44 + MAX_HEADER
+#define MAX_FIN_SIZE	40 + MAX_HEADER
+#define MAX_ACK_SIZE	40 + MAX_HEADER
+#define MAX_RESET_SIZE	40 + MAX_HEADER
+#define MAX_WINDOW	16384
+#define MIN_WINDOW	2048
+#define MAX_ACK_BACKLOG	2
+#define MIN_WRITE_SPACE	2048
+#define TCP_WINDOW_DIFF	2048
+
+/* urg_data states */
+#define URG_VALID	0x0100
+#define URG_NOTYET	0x0200
+#define URG_READ	0x0400
+
+#define TCP_RETR1	7	/*
+				 * This is how many retries it does before it
+				 * tries to figure out if the gateway is
+				 * down.
+				 */
+
+#define TCP_RETR2	15	/*
+				 * This should take at least
+				 * 90 minutes to time out.
+				 */
+
+#define TCP_TIMEOUT_LEN	(15*60*HZ) /* should be about 15 mins		*/
+#define TCP_TIMEWAIT_LEN (60*HZ) /* how long to wait to successfully 
+				  * close the socket, about 60 seconds	*/
+#define TCP_FIN_TIMEOUT (3*60*HZ) /* BSD style FIN_WAIT2 deadlock breaker */				  
+#define TCP_ACK_TIME	(3*HZ)	/* time to delay before sending an ACK	*/
+#define TCP_DONE_TIME	250	/* maximum time to wait before actually
+				 * destroying a socket			*/
+#define TCP_WRITE_TIME	3000	/* initial time to wait for an ACK,
+			         * after last transmit			*/
+#define TCP_TIMEOUT_INIT (3*HZ)	/* RFC 1122 initial timeout value	*/
+#define TCP_SYN_RETRIES	5	/* number of times to retry opening a
+				 * connection 				*/
+#define TCP_PROBEWAIT_LEN 100	/* time to wait between probes when
+				 * I've got something to write and
+				 * there is no window			*/
+
+#define TCP_NO_CHECK	0	/* turn to one if you want the default
+				 * to be no checksum			*/
+
+
+/*
+ *	TCP option
+ */
+ 
+#define TCPOPT_NOP		1	/* Padding */
+#define TCPOPT_EOL		0	/* End of options */
+#define TCPOPT_MSS		2	/* Segment size negotiating */
+/*
+ *	We don't use these yet, but they are for PAWS and big windows
+ */
+#define TCPOPT_WINDOW		3	/* Window scaling */
+#define TCPOPT_TIMESTAMP	8	/* Better RTT estimations/PAWS */
+
+
+/*
+ * The next routines deal with comparing 32 bit unsigned ints
+ * and worry about wraparound (automatic with unsigned arithmetic).
+ */
+
+extern __inline int before(unsigned long seq1, unsigned long seq2)
+{
+        return (long)(seq1-seq2) < 0;
+}
+
+extern __inline int after(unsigned long seq1, unsigned long seq2)
+{
+	return (long)(seq1-seq2) > 0;
+}
+
+
+/* is s2<=s1<=s3 ? */
+extern __inline int between(unsigned long seq1, unsigned long seq2, unsigned long seq3)
+{
+	return (after(seq1+1, seq2) && before(seq1, seq3+1));
+}
+
+
+/*
+ * List all states of a TCP socket that can be viewed as a "connected"
+ * state.  This now includes TCP_SYN_RECV, although I am not yet fully
+ * convinced that this is the solution for the 'getpeername(2)'
+ * problem. Thanks to Stephen A. Wood <saw@cebaf.gov>  -FvK
+ */
+extern __inline const int
+tcp_connected(const int state)
+{
+  return(state == TCP_ESTABLISHED || state == TCP_CLOSE_WAIT ||
+	 state == TCP_FIN_WAIT1   || state == TCP_FIN_WAIT2 ||
+	 state == TCP_SYN_RECV);
+}
+
+
+extern struct proto tcp_prot;
+
+
+extern void	tcp_err(int err, unsigned char *header, unsigned long daddr,
+			unsigned long saddr, struct inet_protocol *protocol);
+extern void	tcp_shutdown (struct sock *sk, int how);
+extern int	tcp_rcv(struct sk_buff *skb, struct device *dev,
+			struct options *opt, unsigned long daddr,
+			unsigned short len, unsigned long saddr, int redo,
+			struct inet_protocol *protocol);
+
+extern int	tcp_ioctl(struct sock *sk, int cmd, unsigned long arg);
+
+extern int tcp_select_window(struct sock *sk);
+extern void tcp_send_check(struct tcphdr *th, unsigned long saddr, 
+		unsigned long daddr, int len, struct sock *sk);
+extern void tcp_send_probe0(struct sock *sk);
+extern void tcp_enqueue_partial(struct sk_buff *, struct sock *);
+extern struct sk_buff * tcp_dequeue_partial(struct sock *);
+
+
+#endif	/* _TCP_H */