2338 lines
76 KiB
C
2338 lines
76 KiB
C
/****************************************************************************
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* net/tcp/tcp.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __NET_TCP_TCP_H
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#define __NET_TCP_TCP_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <nuttx/clock.h>
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#include <nuttx/queue.h>
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#include <nuttx/semaphore.h>
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#include <nuttx/mm/iob.h>
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#include <nuttx/net/ip.h>
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#include <nuttx/net/net.h>
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#include <nuttx/net/tcp.h>
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#include <nuttx/wqueue.h>
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#ifdef CONFIG_NET_TCP
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* This is a helper pointer for accessing the contents of the tcp header */
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#define TCPIPv4BUF ((FAR struct tcp_hdr_s *)IPBUF(IPv4_HDRLEN))
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#define TCPIPv6BUF ((FAR struct tcp_hdr_s *)IPBUF(IPv6_HDRLEN))
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#ifndef CONFIG_NET_TCP_NO_STACK
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#define NET_TCP_HAVE_STACK 1
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/* Allocate a new TCP data callback */
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/* These macros allocate and free callback structures used for receiving
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* notifications of TCP data-related events.
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*/
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#define tcp_callback_alloc(conn) \
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devif_callback_alloc((conn)->dev, &(conn)->sconn.list, &(conn)->sconn.list_tail)
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#define tcp_callback_free(conn,cb) \
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devif_conn_callback_free((conn)->dev, (cb), &(conn)->sconn.list, &(conn)->sconn.list_tail)
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#ifdef CONFIG_NET_TCP_WRITE_BUFFERS
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/* TCP write buffer access macros */
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# define TCP_WBSEQNO(wrb) ((wrb)->wb_seqno)
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# define TCP_WBPKTLEN(wrb) ((wrb)->wb_iob->io_pktlen)
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# define TCP_WBSENT(wrb) ((wrb)->wb_sent)
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# define TCP_WBNRTX(wrb) ((wrb)->wb_nrtx)
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#if defined(CONFIG_NET_TCP_FAST_RETRANSMIT) && !defined(CONFIG_NET_TCP_CC_NEWRENO)
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# define TCP_WBNACK(wrb) ((wrb)->wb_nack)
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#endif
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# define TCP_WBIOB(wrb) ((wrb)->wb_iob)
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# define TCP_WBCOPYOUT(wrb,dest,n) (iob_copyout(dest,(wrb)->wb_iob,(n),0))
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# define TCP_WBCOPYIN(wrb,src,n,off) \
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(iob_copyin((wrb)->wb_iob,src,(n),(off),true))
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# define TCP_WBTRYCOPYIN(wrb,src,n,off) \
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(iob_trycopyin((wrb)->wb_iob,src,(n),(off),true))
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# define TCP_WBTRIM(wrb,n) \
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do { (wrb)->wb_iob = iob_trimhead((wrb)->wb_iob,(n)); } while (0)
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#ifdef CONFIG_DEBUG_FEATURES
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# define TCP_WBDUMP(msg,wrb,len,offset) \
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tcp_wrbuffer_dump(msg,wrb,len,offset)
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# else
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# define TCP_WBDUMP(msg,wrb,len,offset)
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# endif
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#endif
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/* 32-bit modular arithmetics for tcp sequence numbers */
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#define TCP_SEQ_LT(a, b) ((int32_t)((a) - (b)) < 0)
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#define TCP_SEQ_GT(a, b) TCP_SEQ_LT(b, a)
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#define TCP_SEQ_LTE(a, b) (!TCP_SEQ_GT(a, b))
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#define TCP_SEQ_GTE(a, b) (!TCP_SEQ_LT(a, b))
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#define TCP_SEQ_ADD(a, b) ((uint32_t)((a) + (b)))
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#define TCP_SEQ_SUB(a, b) ((uint32_t)((a) - (b)))
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/* The TCP options flags */
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#define TCP_WSCALE 0x01U /* Window Scale option enabled */
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#define TCP_SACK 0x02U /* Selective ACKs enabled */
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#define TCP_CLOSE_ARRANGED 0x04U /* Connection is arranged to be freed */
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#ifdef CONFIG_NET_TCP_CC_NEWRENO
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/* The TCP flags for congestion control */
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#define TCP_INFR 0x08U /* The flag in Fast Recovery */
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#define TCP_INFT 0x10U /* The flag in Fast Transmitted */
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#endif
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/* The Max Range count of TCP Selective ACKs */
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#define TCP_SACK_RANGES_MAX 4
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/* After receiving 3 duplicate ACKs, TCP performs a retransmission
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* (RFC 5681 (3.2))
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*/
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#define TCP_FAST_RETRANSMISSION_THRESH 3
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#define TCP_RTO_MAX 240 /* 120s,The unit is half a second */
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#define TCP_RTO_MIN 1 /* 0.5s */
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/****************************************************************************
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* Public Type Definitions
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****************************************************************************/
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struct file; /* Forward reference */
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struct sockaddr; /* Forward reference */
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struct socket; /* Forward reference */
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struct pollfd; /* Forward reference */
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/* Representation of a TCP connection.
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*
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* The tcp_conn_s structure is used for identifying a connection. All
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* but one field in the structure are to be considered read-only by an
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* application. The only exception is the 'private' fields whose purpose
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* is to let the application store application-specific state (e.g.,
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* file pointers) for the connection.
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*/
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struct net_driver_s; /* Forward reference */
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struct devif_callback_s; /* Forward reference */
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struct tcp_backlog_s; /* Forward reference */
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struct tcp_hdr_s; /* Forward reference */
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/* This is a container that holds the poll-related information */
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struct tcp_poll_s
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{
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FAR struct tcp_conn_s *conn; /* Needed to handle loss of connection */
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FAR struct pollfd *fds; /* Needed to handle poll events */
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FAR struct devif_callback_s *cb; /* Needed to teardown the poll */
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};
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/* Out-of-order segments */
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struct tcp_ofoseg_s
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{
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uint32_t left; /* Left edge of segment */
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uint32_t right; /* Right edge of segment */
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FAR struct iob_s *data; /* Out-of-order buffering */
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};
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/* SACK ranges to include in ACK packets. */
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struct tcp_sack_s
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{
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uint32_t left; /* Left edge of the SACK */
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uint32_t right; /* Right edge of the SACK */
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};
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struct tcp_conn_s
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{
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/* Common prologue of all connection structures. */
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/* TCP callbacks:
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*
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* Data transfer events are retained in 'list'. Event handlers in 'list'
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* are called for events specified in the flags set within struct
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* devif_callback_s
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*
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* When an callback is executed from 'list', the input flags are normally
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* returned, however, the implementation may set one of the following:
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*
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* TCP_CLOSE - Gracefully close the current connection
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* TCP_ABORT - Abort (reset) the current connection on an error that
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* prevents TCP_CLOSE from working.
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*
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* And/Or set/clear the following:
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*
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* TCP_NEWDATA - May be cleared to indicate that the data was consumed
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* and that no further process of the new data should be
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* attempted.
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* TCP_SNDACK - If TCP_NEWDATA is cleared, then TCP_SNDACK may be set to
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* indicate that an ACK should be included in the response.
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* (In TCP_NEWDATA is cleared bu TCP_SNDACK is not set,
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* then dev->d_len should also be cleared).
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*/
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struct socket_conn_s sconn;
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/* TCP-specific content follows */
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union ip_binding_u u; /* IP address binding */
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uint8_t rcvseq[4]; /* The sequence number that we expect to
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* receive next */
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uint8_t sndseq[4]; /* The sequence number that was last sent by us */
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#if !defined(CONFIG_NET_TCP_WRITE_BUFFERS) || \
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defined(CONFIG_NET_SENDFILE)
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uint32_t rexmit_seq; /* The sequence number to be retrasmitted */
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#endif
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uint8_t crefs; /* Reference counts on this instance */
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#if defined(CONFIG_NET_IPv4) && defined(CONFIG_NET_IPv6)
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uint8_t domain; /* IP domain: PF_INET or PF_INET6 */
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#endif
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uint8_t sa; /* Retransmission time-out calculation state
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* variable */
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uint8_t sv; /* Retransmission time-out calculation state
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* variable */
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uint8_t rto; /* Retransmission time-out */
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uint8_t tcpstateflags; /* TCP state and flags */
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struct work_s work; /* TCP timer handle */
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bool timeout; /* Trigger from timer expiry */
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uint8_t timer; /* The retransmission timer (units: half-seconds) */
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uint8_t nrtx; /* The number of retransmissions for the last
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* segment sent */
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#ifdef CONFIG_NET_TCP_DELAYED_ACK
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uint8_t rx_unackseg; /* Number of un-ACKed received segments */
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uint8_t rx_acktimer; /* Time since last ACK sent (units: half-seconds) */
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#endif
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uint16_t lport; /* The local TCP port, in network byte order */
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uint16_t rport; /* The remoteTCP port, in network byte order */
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uint16_t mss; /* Current maximum segment size for the
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* connection */
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#ifdef CONFIG_NET_TCPPROTO_OPTIONS
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uint16_t user_mss; /* Configured maximum segment size for the
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* connection */
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#endif
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uint32_t rcv_adv; /* The right edge of the recv window advertized */
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#ifdef CONFIG_NET_TCP_CC_NEWRENO
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uint32_t last_ackno; /* The ack number at the last receive ack */
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uint32_t dupacks; /* The number of duplicate ack */
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uint32_t fr_recover; /* The snd_seq at the retransmissions */
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uint32_t cwnd; /* The Congestion window */
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uint32_t max_cwnd; /* The Congestion window maximum value */
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uint32_t ssthresh; /* The Slow start threshold */
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#endif
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#ifdef CONFIG_NET_TCP_WINDOW_SCALE
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uint32_t snd_wnd; /* Sequence and acknowledgement numbers of last
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* window update */
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uint8_t snd_scale; /* Sender window scale factor */
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uint8_t rcv_scale; /* Receiver windows scale factor */
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#else
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uint16_t snd_wnd; /* Sequence and acknowledgement numbers of last
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* window update */
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#endif
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uint32_t snd_wl1;
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uint32_t snd_wl2;
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#if CONFIG_NET_RECV_BUFSIZE > 0
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int32_t rcv_bufs; /* Maximum amount of bytes queued in recv */
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#endif
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#if CONFIG_NET_SEND_BUFSIZE > 0
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int32_t snd_bufs; /* Maximum amount of bytes queued in send */
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sem_t snd_sem; /* Semaphore signals send completion */
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#endif
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#if defined(CONFIG_NET_TCP_WRITE_BUFFERS) || \
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defined(CONFIG_NET_TCP_WINDOW_SCALE)
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uint32_t tx_unacked; /* Number bytes sent but not yet ACKed */
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#else
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uint16_t tx_unacked; /* Number bytes sent but not yet ACKed */
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#endif
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uint16_t flags; /* Flags of TCP-specific options */
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#ifdef CONFIG_NET_SOLINGER
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sclock_t ltimeout; /* Linger timeout expiration */
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#endif
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#ifdef CONFIG_NETDEV_RSS
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int rcvcpu; /* Currect cpu id */
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#endif
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/* If the TCP socket is bound to a local address, then this is
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* a reference to the device that routes traffic on the corresponding
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* network.
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*/
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FAR struct net_driver_s *dev;
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/* Read-ahead buffering.
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*
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* readahead - An IOB chain where the TCP/IP read-ahead data is retained.
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*/
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FAR struct iob_s *readahead; /* Read-ahead buffering */
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#ifdef CONFIG_NET_TCP_OUT_OF_ORDER
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/* Number of out-of-order segments */
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uint8_t nofosegs;
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/* This defines a out of order segment block. */
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struct tcp_ofoseg_s ofosegs[TCP_SACK_RANGES_MAX];
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#endif
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#ifdef CONFIG_NET_TCP_WRITE_BUFFERS
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/* Write buffering
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*
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* write_q - The queue of unsent I/O buffers. The head of this
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* list may be partially sent. FIFO ordering.
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* unacked_q - A queue of completely sent, but unacked I/O buffer
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* chains. Sequence number ordering.
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*/
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sq_queue_t write_q; /* Write buffering for segments */
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sq_queue_t unacked_q; /* Write buffering for un-ACKed segments */
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uint16_t expired; /* Number segments retransmitted but not yet ACKed,
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* it can only be updated at TCP_ESTABLISHED state */
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uint32_t sent; /* The number of bytes sent (ACKed and un-ACKed) */
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uint32_t isn; /* Initial sequence number */
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uint32_t sndseq_max; /* The sequence number of next not-retransmitted
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* segment (next greater sndseq) */
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#endif
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#ifdef CONFIG_NET_TCPBACKLOG
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/* Listen backlog support
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*
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* blparent - The backlog parent. If this connection is backlogged,
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* this field will be non-null and will refer to the TCP connection
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* structure in which this connection is backlogged.
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* backlog - The pending connection backlog. If this connection is
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* configured as a listener with backlog, then this refers to the
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* struct tcp_backlog_s tear-off structure that manages that backlog.
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*/
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FAR struct tcp_conn_s *blparent;
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FAR struct tcp_backlog_s *backlog;
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#endif
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#ifdef CONFIG_NET_TCP_KEEPALIVE
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/* There fields manage TCP/IP keep-alive. All times are in units of the
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* system clock tick.
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*/
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uint32_t keeptimer; /* KeepAlive timer (dsec) */
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uint32_t keepidle; /* Elapsed idle time before first probe sent (dsec) */
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uint32_t keepintvl; /* Interval between probes (dsec) */
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bool keepalive; /* True: KeepAlive enabled; false: disabled */
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uint8_t keepcnt; /* Number of retries before the socket is closed */
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uint8_t keepretries; /* Number of retries attempted */
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#endif
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#if defined(CONFIG_NET_SENDFILE) && defined(CONFIG_NET_TCP_WRITE_BUFFERS)
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bool sendfile; /* True if sendfile operation is in progress */
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#endif
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bool zero_probe; /* TCP zero window probe timer */
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/* connevents is a list of callbacks for each socket the uses this
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* connection (there can be more that one in the event that the the socket
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* was dup'ed). It is used with the network monitor to handle
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* asynchronous loss-of-connection events.
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*/
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FAR struct devif_callback_s *connevents;
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FAR struct devif_callback_s *connevents_tail;
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/* Reference to TCP shutdown/close callback instance */
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FAR struct devif_callback_s *shdcb;
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FAR struct devif_callback_s *clscb;
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struct work_s clswork;
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#if defined(CONFIG_NET_TCP_WRITE_BUFFERS)
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/* Callback instance for TCP send() */
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FAR struct devif_callback_s *sndcb;
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#endif
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/* accept() is called when the TCP logic has created a connection
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*
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* accept_private: This is private data that will be available to the
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* accept() handler when it is invoked with a point to this structure
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* as an argument.
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* accept: This is the pointer to the accept handler.
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*/
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FAR void *accept_private;
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CODE int (*accept)(FAR struct tcp_conn_s *listener,
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FAR struct tcp_conn_s *conn);
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/* The following is a list of poll structures of threads waiting for
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* socket events.
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*/
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struct tcp_poll_s pollinfo[CONFIG_NET_TCP_NPOLLWAITERS];
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};
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/* This structure supports TCP write buffering */
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#ifdef CONFIG_NET_TCP_WRITE_BUFFERS
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struct tcp_wrbuffer_s
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{
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sq_entry_t wb_node; /* Supports a singly linked list */
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uint32_t wb_seqno; /* Sequence number of the write segment */
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uint16_t wb_sent; /* Number of bytes sent from the I/O buffer chain */
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uint8_t wb_nrtx; /* The number of retransmissions for the last
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* segment sent */
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#if defined(CONFIG_NET_TCP_FAST_RETRANSMIT) && !defined(CONFIG_NET_TCP_CC_NEWRENO)
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uint8_t wb_nack; /* The number of ack count */
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#endif
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struct iob_s *wb_iob; /* Head of the I/O buffer chain */
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};
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#endif
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/* Support for listen backlog:
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*
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* struct tcp_blcontainer_s describes one backlogged connection
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* struct tcp_backlog_s is a "tear-off" describing all backlog for a
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* listener connection
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*/
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#ifdef CONFIG_NET_TCPBACKLOG
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struct tcp_blcontainer_s
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{
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sq_entry_t bc_node; /* Implements a singly linked list */
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FAR struct tcp_conn_s *bc_conn; /* Holds reference to the new connection structure */
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};
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struct tcp_backlog_s
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{
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sq_queue_t bl_free; /* Implements a singly-linked list of free containers */
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sq_queue_t bl_pending; /* Implements a singly-linked list of pending connections */
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};
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#endif
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: tcp_initialize
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*
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* Description:
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* Initialize the TCP/IP connection structures. Called only once and only
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* from the network layer at start-up.
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*
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****************************************************************************/
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void tcp_initialize(void);
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/****************************************************************************
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* Name: tcp_alloc
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*
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* Description:
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* Find a free TCP/IP connection structure and allocate it
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* for use. This is normally something done by the implementation of the
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* socket() API but is also called from the event processing logic when a
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* TCP packet is received while "listening"
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*
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****************************************************************************/
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FAR struct tcp_conn_s *tcp_alloc(uint8_t domain);
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/****************************************************************************
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* Name: tcp_free_rx_buffers
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*
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* Description:
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* Free rx buffer of a connection
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*
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****************************************************************************/
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|
|
void tcp_free_rx_buffers(FAR struct tcp_conn_s *conn);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_free
|
|
*
|
|
* Description:
|
|
* Free a connection structure that is no longer in use. This should be
|
|
* done by the implementation of close()
|
|
*
|
|
****************************************************************************/
|
|
|
|
void tcp_free(FAR struct tcp_conn_s *conn);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_active
|
|
*
|
|
* Description:
|
|
* Find a connection structure that is the appropriate
|
|
* connection to be used with the provided TCP/IP header
|
|
*
|
|
* Assumptions:
|
|
* Called from network stack logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR struct tcp_conn_s *tcp_active(FAR struct net_driver_s *dev,
|
|
FAR struct tcp_hdr_s *tcp);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_nextconn
|
|
*
|
|
* Description:
|
|
* Traverse the list of active TCP connections
|
|
*
|
|
* Assumptions:
|
|
* Called from network stack logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR struct tcp_conn_s *tcp_nextconn(FAR struct tcp_conn_s *conn);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_local_ipv4_device
|
|
*
|
|
* Description:
|
|
* Select the network driver to use with the IPv4 TCP transaction based
|
|
* on the locally bound IPv4 address
|
|
*
|
|
* Input Parameters:
|
|
* conn - TCP connection structure. The locally bound address, laddr,
|
|
* should be set to a non-zero value in this structure.
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) is returned on success. A negated errno value is returned
|
|
* on failure. -ENETUNREACH is the only expected error value.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_IPv4
|
|
int tcp_local_ipv4_device(FAR struct tcp_conn_s *conn);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_remote_ipv4_device
|
|
*
|
|
* Description:
|
|
* Select the network driver to use with the IPv4 TCP transaction based
|
|
* on the remotely connected IPv4 address
|
|
*
|
|
* Input Parameters:
|
|
* conn - TCP connection structure. The remotely connected address, raddr,
|
|
* should be set to a non-zero value in this structure.
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) is returned on success. A negated errno value is returned
|
|
* on failure. -ENETUNREACH is the only expected error value.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_IPv4
|
|
int tcp_remote_ipv4_device(FAR struct tcp_conn_s *conn);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_local_ipv6_device
|
|
*
|
|
* Description:
|
|
* Select the network driver to use with the IPv6 TCP transaction based
|
|
* on the locally bound IPv6 address
|
|
*
|
|
* Input Parameters:
|
|
* conn - TCP connection structure. The locally bound address, laddr,
|
|
* should be set to a non-zero value in this structure.
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) is returned on success. A negated errno value is returned
|
|
* on failure. -EHOSTUNREACH is the only expected error value.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_IPv6
|
|
int tcp_local_ipv6_device(FAR struct tcp_conn_s *conn);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_remote_ipv6_device
|
|
*
|
|
* Description:
|
|
* Select the network driver to use with the IPv6 TCP transaction based
|
|
* on the remotely connected IPv6 address
|
|
*
|
|
* Input Parameters:
|
|
* conn - TCP connection structure. The remotely connected address, raddr,
|
|
* should be set to a non-zero value in this structure.
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) is returned on success. A negated errno value is returned
|
|
* on failure. -EHOSTUNREACH is the only expected error value.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_IPv6
|
|
int tcp_remote_ipv6_device(FAR struct tcp_conn_s *conn);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_alloc_accept
|
|
*
|
|
* Description:
|
|
* Called when driver processing matches the incoming packet with a
|
|
* connection in LISTEN. In that case, this function will create a new
|
|
* connection and initialize it to send a SYNACK in return.
|
|
*
|
|
* Assumptions:
|
|
* Called from network stack logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR struct tcp_conn_s *tcp_alloc_accept(FAR struct net_driver_s *dev,
|
|
FAR struct tcp_hdr_s *tcp,
|
|
FAR struct tcp_conn_s *listener);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_selectport
|
|
*
|
|
* Description:
|
|
* If the port number is zero; select an unused port for the connection.
|
|
* If the port number is non-zero, verify that no other connection has
|
|
* been created with this port number.
|
|
*
|
|
* Returned Value:
|
|
* Selected or verified port number in network order on success, a negated
|
|
* errno on failure.
|
|
*
|
|
* Assumptions:
|
|
* Interrupts are disabled
|
|
*
|
|
****************************************************************************/
|
|
|
|
int tcp_selectport(uint8_t domain,
|
|
FAR const union ip_addr_u *ipaddr,
|
|
uint16_t portno);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_bind
|
|
*
|
|
* Description:
|
|
* This function implements the lower level parts of the standard TCP
|
|
* bind() operation.
|
|
*
|
|
* Returned Value:
|
|
* 0 on success or -EADDRINUSE on failure
|
|
*
|
|
* Assumptions:
|
|
* This function is called from normal user level code.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int tcp_bind(FAR struct tcp_conn_s *conn, FAR const struct sockaddr *addr);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_connect
|
|
*
|
|
* Description:
|
|
* This function implements the lower level parts of the standard
|
|
* TCP connect() operation: It connects to a remote host using TCP.
|
|
*
|
|
* This function is used to start a new connection to the specified
|
|
* port on the specified host. It uses the connection structure that was
|
|
* allocated by a preceding socket() call. It sets the connection to
|
|
* the SYN_SENT state and sets the retransmission timer to 0. This will
|
|
* cause a TCP SYN segment to be sent out the next time this connection
|
|
* is periodically processed, which usually is done within 0.5 seconds
|
|
* after the call to tcp_connect().
|
|
*
|
|
* Assumptions:
|
|
* This function is called from normal user level code.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int tcp_connect(FAR struct tcp_conn_s *conn,
|
|
FAR const struct sockaddr *addr);
|
|
|
|
/****************************************************************************
|
|
* Name: psock_tcp_connect
|
|
*
|
|
* Description:
|
|
* Perform a TCP connection
|
|
*
|
|
* Input Parameters:
|
|
* psock - A reference to the structure of the socket to be connected
|
|
* addr - The address of the remote server to connect to
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* The network is locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
int psock_tcp_connect(FAR struct socket *psock,
|
|
FAR const struct sockaddr *addr);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_start_monitor
|
|
*
|
|
* Description:
|
|
* Set up to receive TCP connection state changes for a given socket
|
|
*
|
|
* Input Parameters:
|
|
* psock - The socket of interest
|
|
*
|
|
* Returned Value:
|
|
* On success, tcp_start_monitor returns OK; On any failure,
|
|
* tcp_start_monitor will return a negated errno value. The only failure
|
|
* that can occur is if the socket has already been closed and, in this
|
|
* case, -ENOTCONN is returned.
|
|
*
|
|
* Assumptions:
|
|
* The caller holds the network lock (if not, it will be locked momentarily
|
|
* by this function).
|
|
*
|
|
****************************************************************************/
|
|
|
|
int tcp_start_monitor(FAR struct socket *psock);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_stop_monitor
|
|
*
|
|
* Description:
|
|
* Stop monitoring TCP connection changes for a sockets associated with
|
|
* a given TCP connection structure.
|
|
*
|
|
* Input Parameters:
|
|
* conn - The TCP connection of interest
|
|
* flags Set of disconnection events
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* The caller holds the network lock (if not, it will be locked momentarily
|
|
* by this function).
|
|
*
|
|
****************************************************************************/
|
|
|
|
void tcp_stop_monitor(FAR struct tcp_conn_s *conn, uint16_t flags);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_lost_connection
|
|
*
|
|
* Description:
|
|
* Called when a loss-of-connection event has been detected by network
|
|
* event handling logic. Perform operations like tcp_stop_monitor but
|
|
* (1) explicitly mark this socket and (2) disable further callbacks
|
|
* the event handler.
|
|
*
|
|
* Input Parameters:
|
|
* conn - The TCP connection of interest
|
|
* cb - devif callback structure
|
|
* flags - Set of connection events
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* The caller holds the network lock (if not, it will be locked momentarily
|
|
* by this function).
|
|
*
|
|
****************************************************************************/
|
|
|
|
void tcp_lost_connection(FAR struct tcp_conn_s *conn,
|
|
FAR struct devif_callback_s *cb, uint16_t flags);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_close
|
|
*
|
|
* Description:
|
|
* Break any current TCP connection
|
|
*
|
|
* Input Parameters:
|
|
* psock - An instance of the internal socket structure.
|
|
*
|
|
* Assumptions:
|
|
* Called from normal user-level logic
|
|
*
|
|
****************************************************************************/
|
|
|
|
int tcp_close(FAR struct socket *psock);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_shutdown
|
|
*
|
|
* Description:
|
|
* Gracefully shutdown a TCP connection by sending a SYN
|
|
*
|
|
* Input Parameters:
|
|
* psock - An instance of the internal socket structure.
|
|
* how - Specifies the type of shutdown.
|
|
*
|
|
* Assumptions:
|
|
* Called from normal user-level logic
|
|
*
|
|
****************************************************************************/
|
|
|
|
int tcp_shutdown(FAR struct socket *psock, int how);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_ipv4_select
|
|
*
|
|
* Description:
|
|
* Configure to send or receive an TCP IPv4 packet
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_IPv4
|
|
void tcp_ipv4_select(FAR struct net_driver_s *dev);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_ipv6_select
|
|
*
|
|
* Description:
|
|
* Configure to send or receive an TCP IPv6 packet
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_IPv6
|
|
void tcp_ipv6_select(FAR struct net_driver_s *dev);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_ip_select
|
|
*
|
|
* Description:
|
|
* Configure to send or receive an TCP IPv[4|6] packet for connection
|
|
*
|
|
****************************************************************************/
|
|
|
|
void tcp_ip_select(FAR struct tcp_conn_s *conn);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_setsequence
|
|
*
|
|
* Description:
|
|
* Set the TCP/IP sequence number
|
|
*
|
|
* Assumptions:
|
|
* Called from network stack logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
void tcp_setsequence(FAR uint8_t *seqno, uint32_t value);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_getsequence
|
|
*
|
|
* Description:
|
|
* Get the TCP/IP sequence number
|
|
*
|
|
* Assumptions:
|
|
* Called from network stack logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
uint32_t tcp_getsequence(FAR uint8_t *seqno);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_addsequence
|
|
*
|
|
* Description:
|
|
* Add the length to get the next TCP sequence number.
|
|
*
|
|
* Assumptions:
|
|
* Called from network stack logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
uint32_t tcp_addsequence(FAR uint8_t *seqno, uint16_t len);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_initsequence
|
|
*
|
|
* Description:
|
|
* Set the (initial) the TCP/IP sequence number when a TCP connection is
|
|
* established.
|
|
*
|
|
* Assumptions:
|
|
* Called from network stack logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
void tcp_initsequence(FAR struct tcp_conn_s *conn);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_nextsequence
|
|
*
|
|
* Description:
|
|
* Increment the TCP/IP sequence number
|
|
*
|
|
* Assumptions:
|
|
* Called from network stack logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
void tcp_nextsequence(void);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_poll
|
|
*
|
|
* Description:
|
|
* Poll a TCP connection structure for availability of TX data
|
|
*
|
|
* Input Parameters:
|
|
* dev - The device driver structure to use in the send operation
|
|
* conn - The TCP "connection" to poll for TX data
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* Called from network stack logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
void tcp_poll(FAR struct net_driver_s *dev, FAR struct tcp_conn_s *conn);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_timer
|
|
*
|
|
* Description:
|
|
* Handle a TCP timer expiration for the provided TCP connection
|
|
*
|
|
* Input Parameters:
|
|
* dev - The device driver structure to use in the send operation
|
|
* conn - The TCP "connection" to poll for TX data
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* Called from network stack logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
void tcp_timer(FAR struct net_driver_s *dev, FAR struct tcp_conn_s *conn);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_update_timer
|
|
*
|
|
* Description:
|
|
* Update the TCP timer for the provided TCP connection,
|
|
* The timeout is accurate
|
|
*
|
|
* Input Parameters:
|
|
* conn - The TCP "connection" to poll for TX data
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* conn is not NULL.
|
|
* The connection (conn) is bound to the polling device (dev).
|
|
*
|
|
****************************************************************************/
|
|
|
|
void tcp_update_timer(FAR struct tcp_conn_s *conn);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_update_retrantimer
|
|
*
|
|
* Description:
|
|
* Update the retransmit TCP timer for the provided TCP connection,
|
|
* The timeout is accurate
|
|
*
|
|
* Input Parameters:
|
|
* conn - The TCP "connection" to poll for TX data
|
|
* timeout - Time for the next timeout
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* conn is not NULL.
|
|
* The connection (conn) is bound to the polling device (dev).
|
|
*
|
|
****************************************************************************/
|
|
|
|
void tcp_update_retrantimer(FAR struct tcp_conn_s *conn, int timeout);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_update_keeptimer
|
|
*
|
|
* Description:
|
|
* Update the keeplive TCP timer for the provided TCP connection,
|
|
* The timeout is accurate
|
|
*
|
|
* Input Parameters:
|
|
* conn - The TCP "connection" to poll for TX data
|
|
* timeout - Time for the next timeout
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* conn is not NULL.
|
|
* The connection (conn) is bound to the polling device (dev).
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCP_KEEPALIVE
|
|
void tcp_update_keeptimer(FAR struct tcp_conn_s *conn, int timeout);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_stop_timer
|
|
*
|
|
* Description:
|
|
* Stop TCP timer for the provided TCP connection
|
|
* When the connection is closed
|
|
*
|
|
* Input Parameters:
|
|
* conn - The TCP "connection" to poll for TX data
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* conn is not NULL.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void tcp_stop_timer(FAR struct tcp_conn_s *conn);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_findlistener
|
|
*
|
|
* Description:
|
|
* Return the connection listener for connections on this port (if any)
|
|
*
|
|
* Assumptions:
|
|
* The network is locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
#if defined(CONFIG_NET_IPv4) && defined(CONFIG_NET_IPv6)
|
|
FAR struct tcp_conn_s *tcp_findlistener(FAR union ip_binding_u *uaddr,
|
|
uint16_t portno,
|
|
uint8_t domain);
|
|
#else
|
|
FAR struct tcp_conn_s *tcp_findlistener(FAR union ip_binding_u *uaddr,
|
|
uint16_t portno);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_unlisten
|
|
*
|
|
* Description:
|
|
* Stop listening to the port bound to the specified TCP connection
|
|
*
|
|
* Assumptions:
|
|
* Called from normal user code.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int tcp_unlisten(FAR struct tcp_conn_s *conn);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_listen
|
|
*
|
|
* Description:
|
|
* Start listening to the port bound to the specified TCP connection
|
|
*
|
|
* Assumptions:
|
|
* Called from normal user code.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int tcp_listen(FAR struct tcp_conn_s *conn);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_islistener
|
|
*
|
|
* Description:
|
|
* Return true is there is a listener for the specified port
|
|
*
|
|
* Assumptions:
|
|
* Called from network stack logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
#if defined(CONFIG_NET_IPv4) && defined(CONFIG_NET_IPv6)
|
|
bool tcp_islistener(FAR union ip_binding_u *uaddr, uint16_t portno,
|
|
uint8_t domain);
|
|
#else
|
|
bool tcp_islistener(FAR union ip_binding_u *uaddr, uint16_t portno);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_accept_connection
|
|
*
|
|
* Description:
|
|
* Accept the new connection for the specified listening port.
|
|
*
|
|
* Assumptions:
|
|
* Called from network stack logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
int tcp_accept_connection(FAR struct net_driver_s *dev,
|
|
FAR struct tcp_conn_s *conn, uint16_t portno);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_send
|
|
*
|
|
* Description:
|
|
* Setup to send a TCP packet
|
|
*
|
|
* Input Parameters:
|
|
* dev - The device driver structure to use in the send operation
|
|
* conn - The TCP connection structure holding connection information
|
|
* flags - flags to apply to the TCP header
|
|
* len - length of the message
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* Called from network stack logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
void tcp_send(FAR struct net_driver_s *dev, FAR struct tcp_conn_s *conn,
|
|
uint16_t flags, uint16_t len);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_sendfile
|
|
*
|
|
* Description:
|
|
* The tcp_sendfile() call may be used only when the INET socket is in a
|
|
* connected state (so that the intended recipient is known).
|
|
*
|
|
* Input Parameters:
|
|
* psock An instance of the internal socket structure.
|
|
* buf Data to send
|
|
* len Length of data to send
|
|
* flags Send flags
|
|
*
|
|
* Returned Value:
|
|
* On success, returns the number of characters sent. On error,
|
|
* a negated errno value is returned. See sendfile() for a list
|
|
* appropriate error return values.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_SENDFILE
|
|
ssize_t tcp_sendfile(FAR struct socket *psock, FAR struct file *infile,
|
|
FAR off_t *offset, size_t count);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_reset
|
|
*
|
|
* Description:
|
|
* Send a TCP reset (no-data) message
|
|
*
|
|
* Input Parameters:
|
|
* dev - The device driver structure to use in the send operation
|
|
* conn - The TCP connection structure holding connection information
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* Called from network stack logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
void tcp_reset(FAR struct net_driver_s *dev, FAR struct tcp_conn_s *conn);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_rx_mss
|
|
*
|
|
* Description:
|
|
* Return the MSS to advertize to the peer.
|
|
*
|
|
* Input Parameters:
|
|
* dev - The device driver structure
|
|
*
|
|
* Returned Value:
|
|
* The MSS value.
|
|
*
|
|
****************************************************************************/
|
|
|
|
uint16_t tcp_rx_mss(FAR struct net_driver_s *dev);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_synack
|
|
*
|
|
* Description:
|
|
* Send the SYN or SYNACK response.
|
|
*
|
|
* Input Parameters:
|
|
* dev - The device driver structure to use in the send operation
|
|
* conn - The TCP connection structure holding connection information
|
|
* ack - The ACK response to send
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* Called from network stack logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
void tcp_synack(FAR struct net_driver_s *dev, FAR struct tcp_conn_s *conn,
|
|
uint8_t ack);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_appsend
|
|
*
|
|
* Description:
|
|
* Handle application or TCP protocol response. If this function is called
|
|
* with dev->d_sndlen > 0, then this is an application attempting to send
|
|
* packet.
|
|
*
|
|
* Input Parameters:
|
|
* dev - The device driver structure to use in the send operation
|
|
* conn - The TCP connection structure holding connection information
|
|
* result - App result event sent
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* Called from network stack logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
void tcp_appsend(FAR struct net_driver_s *dev, FAR struct tcp_conn_s *conn,
|
|
uint16_t result);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_rexmit
|
|
*
|
|
* Description:
|
|
* Handle application retransmission
|
|
*
|
|
* Input Parameters:
|
|
* dev - The device driver structure to use in the send operation
|
|
* conn - The TCP connection structure holding connection information
|
|
* result - App result event sent
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* Called from network stack logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
void tcp_rexmit(FAR struct net_driver_s *dev, FAR struct tcp_conn_s *conn,
|
|
uint16_t result);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_send_txnotify
|
|
*
|
|
* Description:
|
|
* Notify the appropriate device driver that we are have data ready to
|
|
* be send (TCP)
|
|
*
|
|
* Input Parameters:
|
|
* psock - Socket state structure
|
|
* conn - The TCP connection structure
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
****************************************************************************/
|
|
|
|
void tcp_send_txnotify(FAR struct socket *psock,
|
|
FAR struct tcp_conn_s *conn);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_ipv4_input
|
|
*
|
|
* Description:
|
|
* Handle incoming TCP input with IPv4 header
|
|
*
|
|
* Input Parameters:
|
|
* dev - The device driver structure containing the received TCP packet.
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* Called from the Ethernet driver with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_IPv4
|
|
void tcp_ipv4_input(FAR struct net_driver_s *dev);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_ipv6_input
|
|
*
|
|
* Description:
|
|
* Handle incoming TCP input with IPv4 header
|
|
*
|
|
* Input Parameters:
|
|
* dev - The device driver structure containing the received TCP packet.
|
|
* iplen - The size of the IPv6 header. This may be larger than
|
|
* IPv6_HDRLEN the IPv6 header if IPv6 extension headers are
|
|
* present.
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* Called from the Ethernet driver with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_IPv6
|
|
void tcp_ipv6_input(FAR struct net_driver_s *dev, unsigned int iplen);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_callback
|
|
*
|
|
* Description:
|
|
* Inform the application holding the TCP socket of a change in state.
|
|
*
|
|
* Assumptions:
|
|
* Called from network stack logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
uint16_t tcp_callback(FAR struct net_driver_s *dev,
|
|
FAR struct tcp_conn_s *conn, uint16_t flags);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_datahandler
|
|
*
|
|
* Description:
|
|
* Handle data that is not accepted by the application. This may be called
|
|
* either (1) from the data receive logic if it cannot buffer the data, or
|
|
* (2) from the TCP event logic is there is no listener in place ready to
|
|
* receive the data.
|
|
*
|
|
* Input Parameters:
|
|
* conn - A pointer to the TCP connection structure
|
|
* buffer - A pointer to the buffer to be copied to the read-ahead
|
|
* buffers
|
|
* buflen - The number of bytes to copy to the read-ahead buffer.
|
|
*
|
|
* Returned Value:
|
|
* The number of bytes actually buffered is returned. This will be either
|
|
* zero or equal to buflen; partial packets are not buffered.
|
|
*
|
|
* Assumptions:
|
|
* - The caller has checked that TCP_NEWDATA is set in flags and that is no
|
|
* other handler available to process the incoming data.
|
|
* - Called from network stack logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
uint16_t tcp_datahandler(FAR struct net_driver_s *dev,
|
|
FAR struct tcp_conn_s *conn,
|
|
uint16_t offset);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_backlogcreate
|
|
*
|
|
* Description:
|
|
* Called from the listen() logic to setup the backlog as specified in the
|
|
* the listen arguments.
|
|
*
|
|
* Assumptions:
|
|
* Called from network socket logic. The network may or may not be locked.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCPBACKLOG
|
|
int tcp_backlogcreate(FAR struct tcp_conn_s *conn, int nblg);
|
|
#else
|
|
# define tcp_backlogcreate(c,n) (-ENOSYS)
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_backlogdestroy
|
|
*
|
|
* Description:
|
|
* (1) Called from tcp_free() whenever a connection is freed.
|
|
* (2) Called from tcp_backlogcreate() to destroy any old backlog
|
|
*
|
|
* NOTE: This function may re-enter tcp_free when a connection that
|
|
* is freed that has pending connections.
|
|
*
|
|
* Assumptions:
|
|
* Called from network socket logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCPBACKLOG
|
|
int tcp_backlogdestroy(FAR struct tcp_conn_s *conn);
|
|
#else
|
|
# define tcp_backlogdestroy(conn) (-ENOSYS)
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_backlogadd
|
|
*
|
|
* Description:
|
|
* Called tcp_listen when a new connection is made with a listener socket
|
|
* but when there is no accept() in place to receive the connection. This
|
|
* function adds the new connection to the backlog.
|
|
*
|
|
* Assumptions:
|
|
* Called from network stack logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCPBACKLOG
|
|
int tcp_backlogadd(FAR struct tcp_conn_s *conn,
|
|
FAR struct tcp_conn_s *blconn);
|
|
#else
|
|
# define tcp_backlogadd(conn,blconn) (-ENOSYS)
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_backlogpending
|
|
*
|
|
* Description:
|
|
* Called from poll(). Before waiting for a new connection, poll will
|
|
* call this API to see if there are pending connections in the backlog.
|
|
*
|
|
* Assumptions:
|
|
* The network is locked.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCPBACKLOG
|
|
bool tcp_backlogpending(FAR struct tcp_conn_s *conn);
|
|
#else
|
|
# define tcp_backlogpending(c) (false)
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_backlogavailable
|
|
*
|
|
* Description:
|
|
* Called from tcp_input(). Before alloc a new accept connection, tcp_input
|
|
* will call this API to see if there are free node in the backlog.
|
|
*
|
|
* Assumptions:
|
|
* Called from network socket logic with the network locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCPBACKLOG
|
|
bool tcp_backlogavailable(FAR struct tcp_conn_s *conn);
|
|
#else
|
|
# define tcp_backlogavailable(c) (true)
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_backlogremove
|
|
*
|
|
* Description:
|
|
* Called from accept(). Before waiting for a new connection, accept will
|
|
* call this API to see if there are pending connections in the backlog.
|
|
*
|
|
* Assumptions:
|
|
* The network is locked.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCPBACKLOG
|
|
FAR struct tcp_conn_s *tcp_backlogremove(FAR struct tcp_conn_s *conn);
|
|
#else
|
|
# define tcp_backlogremove(c) (NULL)
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_backlogdelete
|
|
*
|
|
* Description:
|
|
* Called from tcp_free() when a connection is freed that this also
|
|
* retained in the pending connection list of a listener. We simply need
|
|
* to remove the defunct connection from the list.
|
|
*
|
|
* Assumptions:
|
|
* Called from network stack logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCPBACKLOG
|
|
int tcp_backlogdelete(FAR struct tcp_conn_s *conn,
|
|
FAR struct tcp_conn_s *blconn);
|
|
#else
|
|
# define tcp_backlogdelete(c,b) (-ENOSYS)
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_accept
|
|
*
|
|
* Description:
|
|
* This function implements accept() for TCP/IP sockets. See the
|
|
* description of accept() for further information.
|
|
*
|
|
* Input Parameters:
|
|
* psock The listening TCP socket structure
|
|
* addr Receives the address of the connecting client
|
|
* addrlen Input: allocated size of 'addr'
|
|
* Return: returned size of 'addr'
|
|
* newconn The new, accepted TCP connection structure
|
|
*
|
|
* Returned Value:
|
|
* Returns zero (OK) on success or a negated errno value on failure.
|
|
* See the description of accept of the possible errno values in the
|
|
* description of accept().
|
|
*
|
|
* Assumptions:
|
|
* Network is locked.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int psock_tcp_accept(FAR struct socket *psock, FAR struct sockaddr *addr,
|
|
FAR socklen_t *addrlen, FAR void **newconn);
|
|
|
|
/****************************************************************************
|
|
* Name: psock_tcp_recvfrom
|
|
*
|
|
* Description:
|
|
* Perform the recvfrom operation for a TCP/IP SOCK_STREAM
|
|
*
|
|
* Input Parameters:
|
|
* psock Pointer to the socket structure for the SOCK_DRAM socket
|
|
* msg Receive info and buffer for receive data
|
|
* flags Receive flags
|
|
*
|
|
* Returned Value:
|
|
* On success, returns the number of characters received. On error,
|
|
* -errno is returned (see recvfrom for list of errnos).
|
|
*
|
|
* Assumptions:
|
|
*
|
|
****************************************************************************/
|
|
|
|
ssize_t psock_tcp_recvfrom(FAR struct socket *psock, FAR struct msghdr *msg,
|
|
int flags);
|
|
|
|
/****************************************************************************
|
|
* Name: psock_tcp_send
|
|
*
|
|
* Description:
|
|
* The psock_tcp_send() call may be used only when the TCP socket is in a
|
|
* connected state (so that the intended recipient is known).
|
|
*
|
|
* Input Parameters:
|
|
* psock An instance of the internal socket structure.
|
|
* buf Data to send
|
|
* len Length of data to send
|
|
* flags Send flags
|
|
*
|
|
* Returned Value:
|
|
* On success, returns the number of characters sent. On error,
|
|
* -1 is returned, and errno is set appropriately:
|
|
*
|
|
* EAGAIN or EWOULDBLOCK
|
|
* The socket is marked non-blocking and the requested operation
|
|
* would block.
|
|
* EBADF
|
|
* An invalid descriptor was specified.
|
|
* ECONNRESET
|
|
* Connection reset by peer.
|
|
* EDESTADDRREQ
|
|
* The socket is not connection-mode, and no peer address is set.
|
|
* EFAULT
|
|
* An invalid user space address was specified for a parameter.
|
|
* EINTR
|
|
* A signal occurred before any data was transmitted.
|
|
* EINVAL
|
|
* Invalid argument passed.
|
|
* EISCONN
|
|
* The connection-mode socket was connected already but a recipient
|
|
* was specified. (Now either this error is returned, or the recipient
|
|
* specification is ignored.)
|
|
* EMSGSIZE
|
|
* The socket type requires that message be sent atomically, and the
|
|
* size of the message to be sent made this impossible.
|
|
* ENOBUFS
|
|
* The output queue for a network interface was full. This generally
|
|
* indicates that the interface has stopped sending, but may be
|
|
* caused by transient congestion.
|
|
* ENOMEM
|
|
* No memory available.
|
|
* ENOTCONN
|
|
* The socket is not connected, and no target has been given.
|
|
* ENOTSOCK
|
|
* The argument s is not a socket.
|
|
* EPIPE
|
|
* The local end has been shut down on a connection oriented socket.
|
|
* In this case the process will also receive a SIGPIPE unless
|
|
* MSG_NOSIGNAL is set.
|
|
*
|
|
* Assumptions:
|
|
*
|
|
****************************************************************************/
|
|
|
|
ssize_t psock_tcp_send(FAR struct socket *psock, FAR const void *buf,
|
|
size_t len, int flags);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_setsockopt
|
|
*
|
|
* Description:
|
|
* tcp_setsockopt() sets the TCP-protocol option specified by the
|
|
* 'option' argument to the value pointed to by the 'value' argument for
|
|
* the socket specified by the 'psock' argument.
|
|
*
|
|
* See <netinet/tcp.h> for the a complete list of values of TCP protocol
|
|
* options.
|
|
*
|
|
* Input Parameters:
|
|
* psock Socket structure of socket to operate on
|
|
* option identifies the option to set
|
|
* value Points to the argument value
|
|
* value_len The length of the argument value
|
|
*
|
|
* Returned Value:
|
|
* Returns zero (OK) on success. On failure, it returns a negated errno
|
|
* value to indicate the nature of the error. See psock_setcockopt() for
|
|
* the list of possible error values.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCPPROTO_OPTIONS
|
|
int tcp_setsockopt(FAR struct socket *psock, int option,
|
|
FAR const void *value, socklen_t value_len);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_getsockopt
|
|
*
|
|
* Description:
|
|
* tcp_getsockopt() retrieves the value for the option specified by the
|
|
* 'option' argument for the socket specified by the 'psock' argument. If
|
|
* the size of the option value is greater than 'value_len', the value
|
|
* stored in the object pointed to by the 'value' argument will be silently
|
|
* truncated. Otherwise, the length pointed to by the 'value_len' argument
|
|
* will be modified to indicate the actual length of the 'value'.
|
|
*
|
|
* The 'level' argument specifies the protocol level of the option. To
|
|
* retrieve options at the socket level, specify the level argument as
|
|
* SOL_SOCKET; to retrieve options at the TCP-protocol level, the level
|
|
* argument is SOL_TCP.
|
|
*
|
|
* See <sys/socket.h> a complete list of values for the socket-level
|
|
* 'option' argument. Protocol-specific options are are protocol specific
|
|
* header files (such as netinet/tcp.h for the case of the TCP protocol).
|
|
*
|
|
* Input Parameters:
|
|
* psock Socket structure of the socket to query
|
|
* level Protocol level to set the option
|
|
* option identifies the option to get
|
|
* value Points to the argument value
|
|
* value_len The length of the argument value
|
|
*
|
|
* Returned Value:
|
|
* Returns zero (OK) on success. On failure, it returns a negated errno
|
|
* value to indicate the nature of the error. See psock_getsockopt() for
|
|
* the complete list of appropriate return error codes.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCPPROTO_OPTIONS
|
|
int tcp_getsockopt(FAR struct socket *psock, int option,
|
|
FAR void *value, FAR socklen_t *value_len);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_get_recvwindow
|
|
*
|
|
* Description:
|
|
* Calculate the TCP receive window for the specified device.
|
|
*
|
|
* Input Parameters:
|
|
* dev - The device whose TCP receive window will be updated.
|
|
* conn - The TCP connection structure holding connection information.
|
|
*
|
|
* Returned Value:
|
|
* The value of the TCP receive window to use.
|
|
*
|
|
****************************************************************************/
|
|
|
|
uint32_t tcp_get_recvwindow(FAR struct net_driver_s *dev,
|
|
FAR struct tcp_conn_s *conn);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_should_send_recvwindow
|
|
*
|
|
* Description:
|
|
* Determine if we should advertize the new recv window to the peer.
|
|
*
|
|
* Input Parameters:
|
|
* conn - The TCP connection structure holding connection information.
|
|
*
|
|
* Returned Value:
|
|
* If we should send an update.
|
|
*
|
|
****************************************************************************/
|
|
|
|
bool tcp_should_send_recvwindow(FAR struct tcp_conn_s *conn);
|
|
|
|
/****************************************************************************
|
|
* Name: psock_tcp_cansend
|
|
*
|
|
* Description:
|
|
* psock_tcp_cansend() returns a value indicating if a write to the socket
|
|
* would block. No space in the buffer is actually reserved, so it is
|
|
* possible that the write may still block if the buffer is filled by
|
|
* another means.
|
|
*
|
|
* Input Parameters:
|
|
* conn The TCP connection of interest
|
|
*
|
|
* Returned Value:
|
|
* OK
|
|
* At least one byte of data could be successfully written.
|
|
* -EWOULDBLOCK
|
|
* There is no room in the output buffer.
|
|
* -EBADF
|
|
* An invalid descriptor was specified.
|
|
* -ENOTCONN
|
|
* The socket is not connected.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int psock_tcp_cansend(FAR struct tcp_conn_s *conn);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_wrbuffer_initialize
|
|
*
|
|
* Description:
|
|
* Initialize the list of free write buffers
|
|
*
|
|
* Assumptions:
|
|
* Called once early initialization.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCP_WRITE_BUFFERS
|
|
void tcp_wrbuffer_initialize(void);
|
|
#endif /* CONFIG_NET_TCP_WRITE_BUFFERS */
|
|
|
|
#ifdef CONFIG_NET_TCP_WRITE_BUFFERS
|
|
|
|
struct tcp_wrbuffer_s;
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_wrbuffer_timedalloc
|
|
*
|
|
* Description:
|
|
* Allocate a TCP write buffer by taking a pre-allocated buffer from
|
|
* the free list. This function is called from TCP logic when a buffer
|
|
* of TCP data is about to sent
|
|
* This function is wrapped version of tcp_wrbuffer_alloc(),
|
|
* this wait will be terminated when the specified timeout expires.
|
|
*
|
|
* Input Parameters:
|
|
* timeout - The relative time to wait until a timeout is declared.
|
|
*
|
|
* Assumptions:
|
|
* Called from user logic with the network locked.
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR struct tcp_wrbuffer_s *tcp_wrbuffer_timedalloc(unsigned int timeout);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_wrbuffer_alloc
|
|
*
|
|
* Description:
|
|
* Allocate a TCP write buffer by taking a pre-allocated buffer from
|
|
* the free list. This function is called from TCP logic when a buffer
|
|
* of TCP data is about to sent
|
|
*
|
|
* Input Parameters:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* Called from user logic with the network locked.
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR struct tcp_wrbuffer_s *tcp_wrbuffer_alloc(void);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_wrbuffer_tryalloc
|
|
*
|
|
* Description:
|
|
* Try to allocate a TCP write buffer by taking a pre-allocated buffer from
|
|
* the free list. This function is called from TCP logic when a buffer
|
|
* of TCP data is about to be sent if the socket is non-blocking. Returns
|
|
* immediately if allocation fails.
|
|
*
|
|
* Input parameters:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* Called from user logic with the network locked.
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR struct tcp_wrbuffer_s *tcp_wrbuffer_tryalloc(void);
|
|
#endif /* CONFIG_NET_TCP_WRITE_BUFFERS */
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_wrbuffer_release
|
|
*
|
|
* Description:
|
|
* Release a TCP write buffer by returning the buffer to the free list.
|
|
* This function is called from user logic after it is consumed the
|
|
* buffered data.
|
|
*
|
|
* Assumptions:
|
|
* Called from network stack logic with the network stack locked
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCP_WRITE_BUFFERS
|
|
void tcp_wrbuffer_release(FAR struct tcp_wrbuffer_s *wrb);
|
|
#endif /* CONFIG_NET_TCP_WRITE_BUFFERS */
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_wrbuffer_inqueue_size
|
|
*
|
|
* Description:
|
|
* Get the in-queued write buffer size from connection
|
|
*
|
|
* Input Parameters:
|
|
* conn - The TCP connection of interest
|
|
*
|
|
* Assumptions:
|
|
* Called from user logic with the network locked.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#if CONFIG_NET_SEND_BUFSIZE > 0
|
|
uint32_t tcp_wrbuffer_inqueue_size(FAR struct tcp_conn_s *conn);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_wrbuffer_test
|
|
*
|
|
* Description:
|
|
* Check if there is room in the write buffer. Does not reserve any space.
|
|
*
|
|
* Assumptions:
|
|
* None.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCP_WRITE_BUFFERS
|
|
int tcp_wrbuffer_test(void);
|
|
#endif /* CONFIG_NET_TCP_WRITE_BUFFERS */
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_event_handler_dump
|
|
*
|
|
* Description:
|
|
* Dump the TCP event handler related variables
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_DEBUG_FEATURES
|
|
void tcp_event_handler_dump(FAR struct net_driver_s *dev,
|
|
FAR void *pvpriv,
|
|
uint16_t flags,
|
|
FAR struct tcp_conn_s *conn);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_wrbuffer_dump
|
|
*
|
|
* Description:
|
|
* Dump the contents of a write buffer.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCP_WRITE_BUFFERS
|
|
#ifdef CONFIG_DEBUG_FEATURES
|
|
void tcp_wrbuffer_dump(FAR const char *msg, FAR struct tcp_wrbuffer_s *wrb,
|
|
unsigned int len, unsigned int offset);
|
|
#else
|
|
# define tcp_wrbuffer_dump(msg,wrb)
|
|
#endif
|
|
#endif /* CONFIG_NET_TCP_WRITE_BUFFERS */
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_pollsetup
|
|
*
|
|
* Description:
|
|
* Setup to monitor events on one TCP/IP socket
|
|
*
|
|
* Input Parameters:
|
|
* psock - The TCP/IP socket of interest
|
|
* fds - The structure describing the events to be monitored, OR NULL if
|
|
* this is a request to stop monitoring events.
|
|
*
|
|
* Returned Value:
|
|
* 0: Success; Negated errno on failure
|
|
*
|
|
****************************************************************************/
|
|
|
|
int tcp_pollsetup(FAR struct socket *psock, FAR struct pollfd *fds);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_pollteardown
|
|
*
|
|
* Description:
|
|
* Teardown monitoring of events on an TCP/IP socket
|
|
*
|
|
* Input Parameters:
|
|
* psock - The TCP/IP socket of interest
|
|
* fds - The structure describing the events to be monitored, OR NULL if
|
|
* this is a request to stop monitoring events.
|
|
*
|
|
* Returned Value:
|
|
* 0: Success; Negated errno on failure
|
|
*
|
|
****************************************************************************/
|
|
|
|
int tcp_pollteardown(FAR struct socket *psock, FAR struct pollfd *fds);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_readahead_notifier_setup
|
|
*
|
|
* Description:
|
|
* Set up to perform a callback to the worker function when an TCP data
|
|
* is added to the read-ahead buffer. The worker function will execute
|
|
* on the high priority worker thread.
|
|
*
|
|
* Input Parameters:
|
|
* worker - The worker function to execute on the high priority work
|
|
* queue when data is available in the TCP read-ahead buffer.
|
|
* conn - The TCP connection where read-ahead data is needed.
|
|
* arg - A user-defined argument that will be available to the worker
|
|
* function when it runs.
|
|
*
|
|
* Returned Value:
|
|
* > 0 - The signal notification is in place. The returned value is a
|
|
* key that may be used later in a call to
|
|
* tcp_notifier_teardown().
|
|
* == 0 - There is already buffered read-ahead data. No signal
|
|
* notification will be provided.
|
|
* < 0 - An unexpected error occurred and no signal will be sent. The
|
|
* returned value is a negated errno value that indicates the
|
|
* nature of the failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCP_NOTIFIER
|
|
int tcp_readahead_notifier_setup(worker_t worker,
|
|
FAR struct tcp_conn_s *conn,
|
|
FAR void *arg);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_writebuffer_notifier_setup
|
|
*
|
|
* Description:
|
|
* Set up to perform a callback to the worker function when an TCP write
|
|
* buffer is emptied. The worker function will execute on the high
|
|
* priority worker thread.
|
|
*
|
|
* Input Parameters:
|
|
* worker - The worker function to execute on the high priority work
|
|
* queue when all buffer TX data has been sent.
|
|
* conn - The TCP connection where buffer write data is pending.
|
|
* arg - A user-defined argument that will be available to the worker
|
|
* function when it runs.
|
|
*
|
|
* Returned Value:
|
|
* > 0 - The signal notification is in place. The returned value is a
|
|
* key that may be used later in a call to
|
|
* tcp_notifier_teardown().
|
|
* == 0 - There is already buffered read-ahead data. No signal
|
|
* notification will be provided.
|
|
* < 0 - An unexpected error occurred and no signal will be sent. The
|
|
* returned value is a negated errno value that indicates the
|
|
* nature of the failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCP_NOTIFIER
|
|
int tcp_writebuffer_notifier_setup(worker_t worker,
|
|
FAR struct tcp_conn_s *conn,
|
|
FAR void *arg);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_disconnect_notifier_setup
|
|
*
|
|
* Description:
|
|
* Set up to perform a callback to the worker function if the TCP
|
|
* connection is lost.
|
|
*
|
|
* Input Parameters:
|
|
* worker - The worker function to execute on the high priority work
|
|
* queue when data is available in the TCP read-ahead buffer.
|
|
* conn - The TCP connection where read-ahead data is needed.
|
|
* arg - A user-defined argument that will be available to the worker
|
|
* function when it runs.
|
|
*
|
|
* Returned Value:
|
|
* > 0 - The signal notification is in place. The returned value is a
|
|
* key that may be used later in a call to
|
|
* tcp_notifier_teardown().
|
|
* == 0 - No connection has been established.
|
|
* < 0 - An unexpected error occurred and no signal will be sent. The
|
|
* returned value is a negated errno value that indicates the
|
|
* nature of the failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCP_NOTIFIER
|
|
int tcp_disconnect_notifier_setup(worker_t worker,
|
|
FAR struct tcp_conn_s *conn,
|
|
FAR void *arg);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_notifier_teardown
|
|
*
|
|
* Description:
|
|
* Eliminate a TCP read-ahead notification previously setup by
|
|
* tcp_readahead_notifier_setup(). This function should only be called
|
|
* if the notification should be aborted prior to the notification. The
|
|
* notification will automatically be torn down after the signal is sent.
|
|
*
|
|
* Input Parameters:
|
|
* key - The key value returned from a previous call to
|
|
* tcp_readahead_notifier_setup().
|
|
*
|
|
* Returned Value:
|
|
* None.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCP_NOTIFIER
|
|
void tcp_notifier_teardown(int key);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_readahead_signal
|
|
*
|
|
* Description:
|
|
* Read-ahead data has been buffered. Signal all threads waiting for
|
|
* read-ahead data to become available.
|
|
*
|
|
* When read-ahead data becomes available, *all* of the workers waiting
|
|
* for read-ahead data will be executed. If there are multiple workers
|
|
* waiting for read-ahead data then only the first to execute will get the
|
|
* data. Others will need to call tcp_readahead_notifier_setup() once
|
|
* again.
|
|
*
|
|
* Input Parameters:
|
|
* conn - The TCP connection where read-ahead data was just buffered.
|
|
*
|
|
* Returned Value:
|
|
* None.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCP_NOTIFIER
|
|
void tcp_readahead_signal(FAR struct tcp_conn_s *conn);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_writebuffer_signal
|
|
*
|
|
* Description:
|
|
* All buffer Tx data has been sent. Signal all threads waiting for the
|
|
* write buffers to become empty.
|
|
*
|
|
* When write buffer becomes empty, *all* of the workers waiting
|
|
* for that event data will be executed. If there are multiple workers
|
|
* waiting for read-ahead data then only the first to execute will get the
|
|
* data. Others will need to call tcp_writebuffer_notifier_setup() once
|
|
* again.
|
|
*
|
|
* Input Parameters:
|
|
* conn - The TCP connection where read-ahead data was just buffered.
|
|
*
|
|
* Returned Value:
|
|
* None.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#if defined(CONFIG_NET_TCP_WRITE_BUFFERS) && defined(CONFIG_NET_TCP_NOTIFIER)
|
|
void tcp_writebuffer_signal(FAR struct tcp_conn_s *conn);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_disconnect_signal
|
|
*
|
|
* Description:
|
|
* The TCP connection has been lost. Signal all threads monitoring TCP
|
|
* state events.
|
|
*
|
|
* Input Parameters:
|
|
* conn - The TCP connection where read-ahead data was just buffered.
|
|
*
|
|
* Returned Value:
|
|
* None.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCP_NOTIFIER
|
|
void tcp_disconnect_signal(FAR struct tcp_conn_s *conn);
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_txdrain
|
|
*
|
|
* Description:
|
|
* Wait for all write buffers to be sent (or for a timeout to occur).
|
|
*
|
|
* Input Parameters:
|
|
* psock - An instance of the internal socket structure.
|
|
* timeout - The relative time when the timeout will occur
|
|
*
|
|
* Returned Value:
|
|
* Zero (OK) is returned on success; a negated errno value is returned
|
|
* on any failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#if defined(CONFIG_NET_TCP_WRITE_BUFFERS) && defined(CONFIG_NET_TCP_NOTIFIER)
|
|
int tcp_txdrain(FAR struct socket *psock, unsigned int timeout);
|
|
#else
|
|
# define tcp_txdrain(conn, timeout) (0)
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_ioctl
|
|
*
|
|
* Description:
|
|
* This function performs tcp specific ioctl() operations.
|
|
*
|
|
* Parameters:
|
|
* conn The TCP connection of interest
|
|
* cmd The ioctl command
|
|
* arg The argument of the ioctl cmd
|
|
*
|
|
****************************************************************************/
|
|
|
|
int tcp_ioctl(FAR struct tcp_conn_s *conn, int cmd, unsigned long arg);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_sendbuffer_notify
|
|
*
|
|
* Description:
|
|
* Notify the send buffer semaphore
|
|
*
|
|
* Input Parameters:
|
|
* conn - The TCP connection of interest
|
|
*
|
|
* Assumptions:
|
|
* Called from user logic with the network locked.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#if CONFIG_NET_SEND_BUFSIZE > 0
|
|
void tcp_sendbuffer_notify(FAR struct tcp_conn_s *conn);
|
|
#endif /* CONFIG_NET_SEND_BUFSIZE */
|
|
|
|
/****************************************************************************
|
|
* Name: tcpip_hdrsize
|
|
*
|
|
* Description:
|
|
* Get the total size of L3 and L4 TCP header
|
|
*
|
|
* Input Parameters:
|
|
* conn The connection structure associated with the socket
|
|
*
|
|
* Returned Value:
|
|
* the total size of L3 and L4 TCP header
|
|
*
|
|
****************************************************************************/
|
|
|
|
uint16_t tcpip_hdrsize(FAR struct tcp_conn_s *conn);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_ofoseg_bufsize
|
|
*
|
|
* Description:
|
|
* Calculate the pending size of out-of-order buffer
|
|
*
|
|
* Input Parameters:
|
|
* conn - The TCP connection of interest
|
|
*
|
|
* Returned Value:
|
|
* Total size of out-of-order buffer
|
|
*
|
|
* Assumptions:
|
|
* This function must be called with the network locked.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int tcp_ofoseg_bufsize(FAR struct tcp_conn_s *conn);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_reorder_ofosegs
|
|
*
|
|
* Description:
|
|
* Sort out-of-order segments by left edge
|
|
*
|
|
* Input Parameters:
|
|
* nofosegs - Number of out-of-order semgnets
|
|
* ofosegs - Pointer to out-of-order segments
|
|
*
|
|
* Returned Value:
|
|
* True if re-order occurs
|
|
*
|
|
* Assumptions:
|
|
* The network is locked.
|
|
*
|
|
****************************************************************************/
|
|
|
|
bool tcp_reorder_ofosegs(int nofosegs, FAR struct tcp_ofoseg_s *ofosegs);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_cc_init
|
|
*
|
|
* Description:
|
|
* Initialize the congestion control variables, cwnd, ssthresh and dupacks.
|
|
* The function is called on starting a new connection.
|
|
*
|
|
* Input Parameters:
|
|
* conn - The TCP connection of interest
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* The normal user level code is calling the connect/accept to start a new
|
|
* connection.
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_TCP_CC_NEWRENO
|
|
void tcp_cc_init(FAR struct tcp_conn_s *conn);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_cc_update
|
|
*
|
|
* Description:
|
|
* Update the congestion control variables when recieve the SYNACK/ACK
|
|
* packet from the peer in the connection phase.
|
|
*
|
|
* Input Parameters:
|
|
* conn - The TCP connection of interest
|
|
* tcp - The TCP header.
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* The network is locked.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void tcp_cc_update(FAR struct tcp_conn_s *conn, FAR struct tcp_hdr_s *tcp);
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_cc_recv_ack
|
|
*
|
|
* Description:
|
|
* Update congestion control variables
|
|
*
|
|
* Input Parameters:
|
|
* conn - The TCP connection of interest
|
|
* tcp - The TCP header.
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* The network is locked.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void tcp_cc_recv_ack(FAR struct tcp_conn_s *conn, FAR struct tcp_hdr_s *tcp);
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Name: tcp_set_zero_probe
|
|
*
|
|
* Description:
|
|
* Update the TCP probe timer for the provided TCP connection,
|
|
* The timeout is accurate
|
|
*
|
|
* Input Parameters:
|
|
* conn - The TCP "connection" to poll for TX data
|
|
* flags - Set of connection events
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* conn is not NULL.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void tcp_set_zero_probe(FAR struct tcp_conn_s *conn, uint16_t flags);
|
|
|
|
#endif /* !CONFIG_NET_TCP_NO_STACK */
|
|
#endif /* CONFIG_NET_TCP */
|
|
#endif /* __NET_TCP_TCP_H */
|