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-rw-r--r--package/broadcom-57xx/src/proto/bcmtcp.h68
1 files changed, 68 insertions, 0 deletions
diff --git a/package/broadcom-57xx/src/proto/bcmtcp.h b/package/broadcom-57xx/src/proto/bcmtcp.h
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+++ b/package/broadcom-57xx/src/proto/bcmtcp.h
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+/*
+ * Copyright 2007, Broadcom Corporation
+ * All Rights Reserved.
+ *
+ * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
+ * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
+ * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
+ *
+ * Fundamental constants relating to TCP Protocol
+ *
+ * $Id: bcmtcp.h,v 1.1.1.1 2007/05/31 08:00:41 michael Exp $
+ */
+
+#ifndef _bcmtcp_h_
+#define _bcmtcp_h_
+
+/* enable structure packing */
+#if defined(__GNUC__)
+#define PACKED __attribute__((packed))
+#else
+#pragma pack(1)
+#define PACKED
+#endif
+
+#define TCP_SRC_PORT_OFFSET 0 /* TCP source port offset */
+#define TCP_DEST_PORT_OFFSET 2 /* TCP dest port offset */
+#define TCP_CHKSUM_OFFSET 16 /* TCP body checksum offset */
+
+/* These fields are stored in network order */
+struct bcmtcp_hdr
+{
+ uint16 src_port; /* Source Port Address */
+ uint16 dst_port; /* Destination Port Address */
+ uint32 seq_num; /* TCP Sequence Number */
+ uint32 ack_num; /* TCP Sequence Number */
+ uint16 hdrlen_rsvd_flags; /* Header length, reserved bits and flags */
+ uint16 tcpwin; /* TCP window */
+ uint16 chksum; /* Segment checksum with pseudoheader */
+ uint16 urg_ptr; /* Points to seq-num of byte following urg data */
+} PACKED;
+
+#undef PACKED
+#if !defined(__GNUC__)
+#pragma pack()
+#endif
+
+/* Byte offset of flags in TCP header */
+#define TCP_FLAGS_OFFSET 13
+
+#define TCP_FLAGS_FIN 0x01
+#define TCP_FLAGS_SYN 0x02
+#define TCP_FLAGS_RST 0x03
+#define TCP_FLAGS_PSH 0x04
+#define TCP_FLAGS_ACK 0x10
+#define TCP_FLAGS_URG 0x20
+#define TCP_FLAGS_ECN 0x40
+#define TCP_FLAGS_CWR 0x80
+
+#define TCP_FLAGS(tcp_hdr) (((uint8 *)(tcp_hdr))[TCP_FLAGS_OFFSET])
+#define TCP_IS_ACK(tcp_hdr) (TCP_FLAGS(tcp_hdr) & TCP_FLAGS_ACK)
+
+#define TCP_SRC_PORT(tcp_hdr) (ntoh16(((struct bcmtcp_hdr*)(tcp_hdr))->src_port))
+#define TCP_DST_PORT(tcp_hdr) (ntoh16(((struct bcmtcp_hdr*)(tcp_hdr))->dst_port))
+#define TCP_SEQ_NUM(tcp_hdr) (ntoh32(((struct bcmtcp_hdr*)(tcp_hdr))->seq_num))
+#define TCP_ACK_NUM(tcp_hdr) (ntoh32(((struct bcmtcp_hdr*)(tcp_hdr))->ack_num))
+
+#endif /* #ifndef _bcmtcp_h_ */