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TCP support

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This commit is contained in:
Nikhil Chandru Rao
2006-08-01 20:46:50 +00:00
parent c24546c70b
commit 9225f4edac
2 changed files with 716 additions and 0 deletions
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106
src/include/gpxe/tcp.h
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@@ -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 */