TCP support

1 files changed, 106 insertions, 0 deletions

diff --git a/src/include/gpxe/tcp.h b/src/include/gpxe/tcp.h
index fb0c89a7e..cc7d666c2 100644
--- a/src/include/gpxe/tcp.h
+++ b/src/include/gpxe/tcp.h
@@ -11,6 +11,8 @@
 
 #include <stddef.h>
 #include <gpxe/in.h>
+#include <gpxe/list.h>
+#include <gpxe/pkbuff.h>
 
 struct tcp_connection;
 
@@ -87,6 +89,8 @@ struct tcp_operations {
 			      size_t len );
 };
 
+#if USE_UIP
+
 /**
  * A TCP connection
  *
@@ -104,4 +108,106 @@ extern void tcp_send ( struct tcp_connection *conn, const void *data,
 extern void tcp_kick ( struct tcp_connection *conn );
 extern void tcp_close ( struct tcp_connection *conn );
 
+#else
+
+#define TCP_NOMSG ""
+#define TCP_NOMSG_LEN 0
+
+/* Smallest port number on which a TCP connection can listen */
+#define TCP_MIN_PORT 1
+
+/* Some PKB constants */
+#define MAX_HDR_LEN	100
+#define MAX_PKB_LEN	1500
+#define MIN_PKB_LEN	MAX_HDR_LEN + 100 /* To account for padding by LL */
+
+/**
+ * TCP states
+ */
+#define TCP_CLOSED	0
+#define TCP_LISTEN	1
+#define TCP_SYN_SENT	2
+#define TCP_SYN_RCVD	3
+#define TCP_ESTABLISHED	4
+#define TCP_FIN_WAIT_1	5
+#define TCP_FIN_WAIT_2	6
+#define TCP_CLOSING	7
+#define TCP_TIME_WAIT	8
+#define TCP_CLOSE_WAIT	9
+#define TCP_LAST_ACK	10
+
+#define TCP_INVALID	11
+
+/**
+ * A TCP connection
+ */
+struct tcp_connection {
+	struct sockaddr sa;		/* Remote socket address */
+	struct sockaddr_in sin;		/* Internet socket address */
+	uint16_t local_port;		/* Local port, in network byte order */
+	int tcp_state;			/* TCP state */
+	int tcp_lstate;			/* Last TCP state */
+	uint32_t snd_una;		/* Lowest unacked byte on snd stream */
+	uint32_t snd_win;		/* Offered by remote end */
+	uint32_t rcv_nxt;		/* Next expected byte on rcv stream */
+	uint32_t rcv_win;		/* Advertised to receiver */
+	uint8_t tcp_flags;		/* TCP header flags */
+	struct list_head list;		/* List of TCP connections */
+	struct pk_buff *tx_pkb;		/* Transmit packet buffer */
+	struct tcp_operations *tcp_op;	/* Operations table for connection */
+};
+
+/**
+ * Connection closed status codes
+ */
+#define CONN_SNDCLOSE	0
+#define CONN_RESTART	1
+#define CONN_TIMEOUT	2
+#define CONN_RCVCLOSE	3
+
+/**
+ * A TCP header
+ */
+struct tcp_header {
+	uint16_t src;		/* Source port */
+	uint16_t dest;		/* Destination port */
+	uint32_t seq;		/* Sequence number */
+	uint32_t ack;		/* Acknowledgement number */
+	uint8_t hlen;		/* Header length (4), Reserved (4) */
+	uint8_t flags;		/* Reserved (2), Flags (6) */
+	uint16_t win;		/* Advertised window */
+	uint16_t csum;		/* Checksum */
+	uint16_t urg;		/* Urgent pointer */
+};
+
+/**
+ * TCP masks
+ */
+#define TCP_MASK_HLEN	0xf0
+#define TCP_MASK_FLAGS	0x3f
+
+/**
+ * TCP flags
+ */
+#define TCP_RST		0x20
+#define TCP_ACK		0x10
+#define TCP_PSH		0x08
+#define TCP_URG		0x04
+#define TCP_SYN		0x02
+#define TCP_FIN		0x01
+
+extern struct tcpip_protocol tcp_protocol;
+
+extern void tcp_init_conn ( struct tcp_connection *conn );
+extern int tcp_connect ( struct tcp_connection *conn );
+extern int tcp_connectto ( struct tcp_connection *conn, struct sockaddr *peer );
+extern int tcp_listen ( struct tcp_connection *conn, uint16_t port );
+extern int tcp_senddata ( struct tcp_connection *conn );
+extern int tcp_close ( struct tcp_connection *conn );
+
+extern int tcp_send ( struct tcp_connection *conn, const void *data, 
+		      size_t len );
+
+#endif /* USE_UIP */
+
 #endif /* _GPXE_TCP_H */