diff options
Diffstat (limited to 'nuttx/include/net/uip/uip-tcp.h')
| -rw-r--r-- | nuttx/include/net/uip/uip-tcp.h | 95 |
1 files changed, 77 insertions, 18 deletions
diff --git a/nuttx/include/net/uip/uip-tcp.h b/nuttx/include/net/uip/uip-tcp.h index 409081f28..91c5ecbd0 100644 --- a/nuttx/include/net/uip/uip-tcp.h +++ b/nuttx/include/net/uip/uip-tcp.h @@ -77,19 +77,19 @@ /* The TCP states used in the struct uip_conn tcpstateflags field */ -#define UIP_CLOSED 0 /* The connection is not in use and available */ -#define UIP_ALLOCATED 1 /* The connection is allocated, but not yet initialized */ -#define UIP_SYN_RCVD 2 -#define UIP_SYN_SENT 3 -#define UIP_ESTABLISHED 4 -#define UIP_FIN_WAIT_1 5 -#define UIP_FIN_WAIT_2 6 -#define UIP_CLOSING 7 -#define UIP_TIME_WAIT 8 -#define UIP_LAST_ACK 9 - -#define UIP_TS_MASK 15 -#define UIP_STOPPED 16 +#define UIP_TS_MASK 0x0f /* Bits 0-3: TCP state */ +#define UIP_CLOSED 0x00 /* The connection is not in use and available */ +#define UIP_ALLOCATED 0x01 /* The connection is allocated, but not yet initialized */ +#define UIP_SYN_RCVD 0x02 +#define UIP_SYN_SENT 0x03 +#define UIP_ESTABLISHED 0x04 +#define UIP_FIN_WAIT_1 0x05 +#define UIP_FIN_WAIT_2 0x06 +#define UIP_CLOSING 0x07 +#define UIP_TIME_WAIT 0x08 +#define UIP_LAST_ACK 0x09 +#define UIP_STOPPED 0x10 /* Bit 4: stopped */ + /* Bit 5-7: Unused, but not available */ /* Flag bits in 16-bit flags+ipoffset IPv4 TCP header field */ @@ -118,13 +118,11 @@ struct uip_driver_s; /* Forward reference */ struct uip_callback_s; /* Forward reference */ +struct uip_backlog_s; /* Forward reference */ struct uip_conn { dq_entry_t node; /* Implements a doubly linked list */ -#if 0 /* Not used */ - uip_ipaddr_t lipaddr; /* The local IP address */ -#endif uip_ipaddr_t ripaddr; /* The IP address of the remote host */ uint16 lport; /* The local TCP port, in network byte order */ uint16 rport; /* The remoteTCP port, in network byte order */ @@ -146,10 +144,29 @@ struct uip_conn uint8 nrtx; /* The number of retransmissions for the last * segment sent */ - /* Read-ahead buffering */ + /* Read-ahead buffering. + * + * readahead - A singly linked list of type struct uip_readahead_s + * where the TCP/IP read-ahead data is retained. + */ #if CONFIG_NET_NTCP_READAHEAD_BUFFERS > 0 - sq_queue_t readahead; + sq_queue_t readahead; /* Read-ahead buffering */ +#endif + + /* Listen backlog support + * + * blparent - The backlog parent. If this connection is backlogged, + * this field will be non-null and will refer to the TCP connection + * structure in which this connection is backlogged. + * backlog - The pending connection backlog. If this connection is + * configured as a listener with backlog, then this refers to the + * struct uip_backlog_s tear-off structure that manages that backlog. + */ + +#ifdef CONFIG_NET_TCPBACKLOG + struct uip_conn *blparent; + struct uip_backlog_s *backlog; #endif /* Application callbacks: @@ -204,6 +221,27 @@ struct uip_readahead_s }; #endif +/* Support for listen backlog: + * + * struct uip_blcontainer_s describes one backlogged connection + * struct uip_backlog_s is a "tear-off" describing all backlog for a + * listener connection + */ + +#ifdef CONFIG_NET_TCPBACKLOG +struct uip_blcontainer_s +{ + dq_entry_t bc_node; /* Implements a doubly linked list */ + FAR struct uip_conn *bc_conn; /* Holds reference to the new connection structure */ +}; + +struct uip_backlog_s +{ + dq_queue_t bl_free; /* Implements a doubly-linked list of free containers */ + dq_queue_t bl_pending; /* Implements a doubly-linked list of pending connections */ +}; +#endif + /* The structure holding the TCP/IP statistics that are gathered if * CONFIG_NET_STATISTICS is defined. */ @@ -350,6 +388,27 @@ extern struct uip_readahead_s *uip_tcpreadaheadalloc(void); extern void uip_tcpreadaheadrelease(struct uip_readahead_s *buf); #endif /* CONFIG_NET_NTCP_READAHEAD_BUFFERS */ +/* Backlog support */ + +#ifdef CONFIG_NET_TCPBACKLOG +/* APIs to create and terminate TCP backlog support */ + +extern int uip_backlogcreate(FAR struct uip_conn *conn, int nblg); +extern int uip_backlogdestroy(FAR struct uip_conn *conn); + +/* APIs to manage individual backlog actions */ + +extern int uip_backlogadd(FAR struct uip_conn *conn, FAR struct uip_conn *blconn); +extern FAR struct uip_conn *uip_backlogremove(FAR struct uip_conn *conn); +extern int uip_backlogdelete(FAR struct uip_conn *conn, FAR struct uip_conn *blconn); + +#else +# define uip_backlogcreate(conn,nblg) (-ENOSYS) +# define uip_backlogdestroy(conn) (-ENOSYS) +# define uip_backlogadd(conn,blconn) (-ENOSYS) +# define uip_backlogremove(conn) (NULL) +#endif + /* Tell the sending host to stop sending data. * * This function will close our receiver's window so that we stop |