openflow build environment setup

2025-11-11 16:45:43 +08:00
parent be0a7ad9b3
commit 50ecb9a23f
2767 changed files with 62766 additions and 649828 deletions
--- a/openflow/include/clicknet/tcp.h
+++ b/openflow/include/clicknet/tcp.h
@ -0,0 +1,78 @@
+/* -*- c-basic-offset: 4 -*- */
+#ifndef CLICKNET_TCP_H
+#define CLICKNET_TCP_H
+
+/*
+ * <clicknet/tcp.h> -- TCP header definitions, based on one of the BSDs.
+ *
+ * Relevant RFCs include:
+ *   RFC793	Transmission Control Protocol
+ *   RFC1323	TCP Extensions for High Performance
+ *   RFC2018	TCP Selective Acknowledgement Options
+ *   RFC2581	TCP Congestion Control
+ *   RFC2883	An Extension to the Selective Acknowledgement (SACK) Option
+ *		for TCP
+ *   RFC3168	The Addition of Explicit Congestion Notification (ECN) to IP
+ *   RFC3540	Robust Explicit Congestion Notification (ECN) Signaling with
+ *		Nonces
+ * among many others.  See "A Roadmap for TCP Specification Documents",
+ * currently an Internet-Draft.
+ */
+
+typedef	uint32_t tcp_seq_t;
+
+struct click_tcp {
+    uint16_t	th_sport;		/* 0-1   source port		     */
+    uint16_t	th_dport;		/* 2-3   destination port	     */
+    tcp_seq_t	th_seq;			/* 4-7   sequence number	     */
+    tcp_seq_t	th_ack;			/* 8-11  acknowledgement number	     */
+#if CLICK_BYTE_ORDER == CLICK_LITTLE_ENDIAN
+    unsigned	th_flags2 : 4;		/* 12    more flags		     */
+    unsigned	th_off : 4;		/*       data offset in words	     */
+#elif CLICK_BYTE_ORDER == CLICK_BIG_ENDIAN
+    unsigned	th_off : 4;		/* 12    data offset in words	     */
+    unsigned	th_flags2 : 4;		/*       more flags		     */
+#else
+#   error "unknown byte order"
+#endif
+#define TH_NS		0x01		/*       in 'th_flags2'		     */
+    uint8_t	th_flags;		/* 13    flags			     */
+#define	TH_FIN		0x01
+#define	TH_SYN		0x02
+#define	TH_RST		0x04
+#define	TH_PUSH		0x08
+#define	TH_ACK		0x10
+#define	TH_URG		0x20
+#define	TH_ECE		0x40
+#define	TH_CWR		0x80
+    uint16_t	th_win;			/* 14-15 window			     */
+    uint16_t	th_sum;			/* 16-17 checksum		     */
+    uint16_t	th_urp;			/* 18-19 urgent pointer		     */
+};
+
+/*
+ * TCP sequence number comparisons
+ */
+
+#define SEQ_LT(x,y)	((int)((x)-(y)) < 0)
+#define SEQ_LEQ(x,y)	((int)((x)-(y)) <= 0)
+#define SEQ_GT(x,y)	((int)((x)-(y)) > 0)
+#define SEQ_GEQ(x,y)	((int)((x)-(y)) >= 0)
+
+/*
+ * TCP options
+ */
+
+#define TCPOPT_EOL		0
+#define TCPOPT_NOP		1
+#define TCPOPT_MAXSEG		2
+#define TCPOLEN_MAXSEG		4
+#define TCPOPT_WSCALE		3
+#define TCPOLEN_WSCALE		3
+#define TCPOPT_SACK_PERMITTED	4
+#define TCPOLEN_SACK_PERMITTED	2
+#define TCPOPT_SACK		5
+#define TCPOPT_TIMESTAMP	8
+#define TCPOLEN_TIMESTAMP	10
+
+#endif