90c52e6f8f
Author: Gregory Nutt <gnutt@nuttx.org>
Run all .h and .c files modified in last PR through nxstyle.
Author: Xiang Xiao <xiaoxiang@xiaomi.com>
Net cleanup (#17)
* Fix the semaphore usage issue found in tcp/udp
1. The count semaphore need disable priority inheritance
2. Loop again if net_lockedwait return -EINTR
3. Call nxsem_trywait to avoid the race condition
4. Call nxsem_post instead of sem_post
* Put the work notifier into free list to avoid the heap fragment in the long run. Since the allocation strategy is encapsulated internally, we can even refine the implementation later.
* Network stack shouldn't allocate memory in the poll implementation to avoid the heap fragment in the long run, other modification include:
1. Select MM_IOB automatically since ICMP[v6] socket can't work without the read ahead buffer
2. Remove the net lock since xxx_callback_free already do the same thing
3. TCP/UDP poll should work even the read ahead buffer isn't enabled at all
* Add NET_ prefix for UDP_NOTIFIER and TCP_NOTIFIER option to align with other UDP/TCP option convention
* Remove the unused _SF_[IDLE|ACCEPT|SEND|RECV|MASK] flags since there are code to set/clear these flags, but nobody check them.
1357 lines
39 KiB
C
1357 lines
39 KiB
C
/****************************************************************************
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* net/inet/inet_sockif.c
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*
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* Copyright (C) 2017-2018 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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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 <sys/socket.h>
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#include <stdbool.h>
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#include <assert.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/net/net.h>
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#include "tcp/tcp.h"
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#include "udp/udp.h"
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#include "icmp/icmp.h"
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#include "icmpv6/icmpv6.h"
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#include "sixlowpan/sixlowpan.h"
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#include "socket/socket.h"
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#include "inet/inet.h"
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#ifdef HAVE_INET_SOCKETS
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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#if defined(NET_UDP_HAVE_STACK) || defined(NET_TCP_HAVE_STACK)
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static int inet_setup(FAR struct socket *psock, int protocol);
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static sockcaps_t inet_sockcaps(FAR struct socket *psock);
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static void inet_addref(FAR struct socket *psock);
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static int inet_bind(FAR struct socket *psock,
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FAR const struct sockaddr *addr, socklen_t addrlen);
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static int inet_getsockname(FAR struct socket *psock,
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FAR struct sockaddr *addr, FAR socklen_t *addrlen);
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static int inet_getpeername(FAR struct socket *psock,
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FAR struct sockaddr *addr, FAR socklen_t *addrlen);
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static int inet_listen(FAR struct socket *psock, int backlog);
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static int inet_connect(FAR struct socket *psock,
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FAR const struct sockaddr *addr, socklen_t addrlen);
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static int inet_accept(FAR struct socket *psock,
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FAR struct sockaddr *addr, FAR socklen_t *addrlen,
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FAR struct socket *newsock);
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static int inet_poll(FAR struct socket *psock,
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FAR struct pollfd *fds, bool setup);
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static ssize_t inet_send(FAR struct socket *psock, FAR const void *buf,
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size_t len, int flags);
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static ssize_t inet_sendto(FAR struct socket *psock, FAR const void *buf,
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size_t len, int flags, FAR const struct sockaddr *to,
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socklen_t tolen);
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#ifdef CONFIG_NET_SENDFILE
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static ssize_t inet_sendfile(FAR struct socket *psock, FAR struct file *infile,
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FAR off_t *offset, size_t count);
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#endif
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static const struct sock_intf_s g_inet_sockif =
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{
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inet_setup, /* si_setup */
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inet_sockcaps, /* si_sockcaps */
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inet_addref, /* si_addref */
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inet_bind, /* si_bind */
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inet_getsockname, /* si_getsockname */
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inet_getpeername, /* si_getpeername */
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inet_listen, /* si_listen */
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inet_connect, /* si_connect */
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inet_accept, /* si_accept */
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inet_poll, /* si_poll */
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inet_send, /* si_send */
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inet_sendto, /* si_sendto */
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#ifdef CONFIG_NET_SENDFILE
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inet_sendfile, /* si_sendfile */
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#endif
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inet_recvfrom, /* si_recvfrom */
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inet_close /* si_close */
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: inet_tcp_alloc
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*
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* Description:
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* Allocate and attach a TCP connection structure.
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*
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****************************************************************************/
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#ifdef NET_TCP_HAVE_STACK
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static int inet_tcp_alloc(FAR struct socket *psock)
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{
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/* Allocate the TCP connection structure */
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FAR struct tcp_conn_s *conn = tcp_alloc(psock->s_domain);
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if (conn == NULL)
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{
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/* Failed to reserve a connection structure */
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nerr("ERROR: Failed to reserve TCP connection structure\n");
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return -ENOMEM;
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}
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/* Set the reference count on the connection structure. This reference
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* count will be incremented only if the socket is dup'ed
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*/
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DEBUGASSERT(conn->crefs == 0);
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conn->crefs = 1;
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/* Save the pre-allocated connection in the socket structure */
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psock->s_conn = conn;
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return OK;
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}
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#endif /* NET_TCP_HAVE_STACK */
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/****************************************************************************
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* Name: inet_udp_alloc
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*
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* Description:
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* Allocate and attach a UDP connection structure.
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*
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****************************************************************************/
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#ifdef NET_UDP_HAVE_STACK
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static int inet_udp_alloc(FAR struct socket *psock)
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{
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/* Allocate the UDP connection structure */
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FAR struct udp_conn_s *conn = udp_alloc(psock->s_domain);
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if (conn == NULL)
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{
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/* Failed to reserve a connection structure */
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nerr("ERROR: Failed to reserve UDP connection structure\n");
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return -ENOMEM;
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}
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/* Set the reference count on the connection structure. This reference
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* count will be incremented only if the socket is dup'ed
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*/
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DEBUGASSERT(conn->crefs == 0);
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conn->crefs = 1;
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/* Save the pre-allocated connection in the socket structure */
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psock->s_conn = conn;
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return OK;
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}
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#endif /* NET_UDP_HAVE_STACK */
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/****************************************************************************
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* Name: inet_setup
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*
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* Description:
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* Called for socket() to verify that the provided socket type and
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* protocol are usable by this address family. Perform any family-
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* specific socket fields.
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*
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* NOTE: This is common logic for both the AF_INET and AF_INET6 address
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* families.
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*
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* Input Parameters:
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* psock A pointer to a user allocated socket structure to be initialized.
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* protocol (see sys/socket.h)
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*
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* Returned Value:
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* Zero (OK) is returned on success. Otherwise, a negated errno value is
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* returned.
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*
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****************************************************************************/
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static int inet_setup(FAR struct socket *psock, int protocol)
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{
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/* Allocate the appropriate connection structure. This reserves the
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* the connection structure is is unallocated at this point. It will
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* not actually be initialized until the socket is connected.
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*
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* REVISIT: Only SOCK_STREAM and SOCK_DGRAM are supported.
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*/
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switch (psock->s_type)
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{
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#ifdef CONFIG_NET_TCP
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case SOCK_STREAM:
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if (protocol != 0 && protocol != IPPROTO_TCP)
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{
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nerr("ERROR: Unsupported stream protocol: %d\n", protocol);
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return -EPROTONOSUPPORT;
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}
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#ifdef NET_TCP_HAVE_STACK
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/* Allocate and attach the TCP connection structure */
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return inet_tcp_alloc(psock);
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#else
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nwarn("WARNING: SOCK_STREAM disabled\n");
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return -ENETDOWN;
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#endif
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#endif /* CONFIG_NET_TCP */
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#ifdef CONFIG_NET_UDP
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case SOCK_DGRAM:
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if (protocol != 0 && protocol != IPPROTO_UDP)
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{
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nerr("ERROR: Unsupported datagram protocol: %d\n", protocol);
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return -EPROTONOSUPPORT;
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}
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#ifdef NET_UDP_HAVE_STACK
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/* Allocate and attach the UDP connection structure */
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return inet_udp_alloc(psock);
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#else
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nwarn("WARNING: SOCK_DGRAM disabled\n");
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return -ENETDOWN;
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#endif
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#endif /* CONFIG_NET_UDP */
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default:
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nerr("ERROR: Unsupported type: %d\n", psock->s_type);
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return -EPROTONOSUPPORT;
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}
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}
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/****************************************************************************
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* Name: inet_sockcaps
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*
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* Description:
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* Return the bit encoded capabilities of this socket.
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*
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* Input Parameters:
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* psock - Socket structure of the socket whose capabilities are being
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* queried.
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*
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* Returned Value:
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* The non-negative set of socket cababilities is returned.
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*
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****************************************************************************/
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static sockcaps_t inet_sockcaps(FAR struct socket *psock)
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{
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switch (psock->s_type)
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{
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#ifdef NET_TCP_HAVE_STACK
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case SOCK_STREAM:
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/* REVISIT: Non-blocking recv() depends on CONFIG_NET_TCP_READAHEAD,
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* but non-blocking send() depends on CONFIG_NET_TCP_WRITE_BUFFERS.
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*/
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#ifdef CONFIG_NET_TCP_READAHEAD
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return SOCKCAP_NONBLOCKING;
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#else
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return 0;
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#endif
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#endif
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#ifdef NET_UDP_HAVE_STACK
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case SOCK_DGRAM:
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/* REVISIT: Non-blocking recvfrom() depends on CONFIG_NET_UDP_READAHEAD,
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* but non-blocking sendto() depends on CONFIG_NET_UDP_WRITE_BUFFERS.
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*/
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#ifdef CONFIG_NET_UDP_READAHEAD
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return SOCKCAP_NONBLOCKING;
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#else
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return 0;
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#endif
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#endif
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default:
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return 0;
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}
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}
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/****************************************************************************
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* Name: inet_addref
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*
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* Description:
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* Increment the reference count on the underlying connection structure.
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*
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* Input Parameters:
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* psock - Socket structure of the socket whose reference count will be
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* incremented.
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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static void inet_addref(FAR struct socket *psock)
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{
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DEBUGASSERT(psock != NULL && psock->s_conn != NULL);
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#ifdef NET_TCP_HAVE_STACK
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if (psock->s_type == SOCK_STREAM)
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{
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FAR struct tcp_conn_s *conn = psock->s_conn;
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DEBUGASSERT(conn->crefs > 0 && conn->crefs < 255);
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conn->crefs++;
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}
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else
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#endif
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#ifdef NET_UDP_HAVE_STACK
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if (psock->s_type == SOCK_DGRAM)
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{
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FAR struct udp_conn_s *conn = psock->s_conn;
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DEBUGASSERT(conn->crefs > 0 && conn->crefs < 255);
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conn->crefs++;
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}
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else
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#endif
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{
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nerr("ERROR: Unsupported type: %d\n", psock->s_type);
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}
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}
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/****************************************************************************
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* Name: inet_bind
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*
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* Description:
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* inet_bind() gives the socket 'psock' the local address 'addr'. 'addr'
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* is 'addrlen' bytes long. Traditionally, this is called "assigning a
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* name to a socket." When a socket is created with socket(), it exists
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* in a name space (address family) but has no name assigned.
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*
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* Input Parameters:
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* psock Socket structure of the socket to bind
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* addr Socket local address
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* addrlen Length of 'addr'
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*
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* Returned Value:
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* 0 on success; A negated errno value is returned on failure. See
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* bind() for a list a appropriate error values.
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*
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****************************************************************************/
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static int inet_bind(FAR struct socket *psock,
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FAR const struct sockaddr *addr, socklen_t addrlen)
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{
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int minlen;
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int ret;
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|
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/* Verify that a valid address has been provided */
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switch (addr->sa_family)
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{
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#ifdef CONFIG_NET_IPv4
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case AF_INET:
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minlen = sizeof(struct sockaddr_in);
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break;
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#endif
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#ifdef CONFIG_NET_IPv6
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case AF_INET6:
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minlen = sizeof(struct sockaddr_in6);
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break;
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#endif
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default:
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nerr("ERROR: Unrecognized address family: %d\n", addr->sa_family);
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return -EAFNOSUPPORT;
|
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}
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|
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if (addrlen < minlen)
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{
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nerr("ERROR: Invalid address length: %d < %d\n", addrlen, minlen);
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return -EBADF;
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}
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|
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/* Perform the binding depending on the protocol type */
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switch (psock->s_type)
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{
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#ifdef CONFIG_NET_TCP
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case SOCK_STREAM:
|
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{
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#ifdef NET_TCP_HAVE_STACK
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/* Bind a TCP/IP stream socket. */
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ret = tcp_bind(psock->s_conn, addr);
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|
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/* Mark the socket bound */
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if (ret >= 0)
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{
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psock->s_flags |= _SF_BOUND;
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}
|
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#else
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nwarn("WARNING: TCP/IP stack is not available in this configuration\n");
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return -ENOSYS;
|
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#endif
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}
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break;
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#endif /* CONFIG_NET_TCP */
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|
|
#ifdef CONFIG_NET_UDP
|
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case SOCK_DGRAM:
|
|
{
|
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#ifdef NET_UDP_HAVE_STACK
|
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/* Bind a UDP/IP datagram socket */
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|
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ret = udp_bind(psock->s_conn, addr);
|
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|
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/* Mark the socket bound */
|
|
|
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if (ret >= 0)
|
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{
|
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psock->s_flags |= _SF_BOUND;
|
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}
|
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#else
|
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nwarn("WARNING: UDP stack is not available in this configuration\n");
|
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ret = -ENOSYS;
|
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#endif
|
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}
|
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break;
|
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#endif /* CONFIG_NET_UDP */
|
|
|
|
default:
|
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nerr("ERROR: Unsupported socket type: %d\n", psock->s_type);
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ret = -EBADF;
|
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break;
|
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}
|
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|
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return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: inet_getsockname
|
|
*
|
|
* Description:
|
|
* The inet_getsockname() function retrieves the locally-bound name of
|
|
* the specified INET socket, stores this address in the sockaddr
|
|
* structure pointed to by the 'addr' argument, and stores the length of
|
|
* this address in the object pointed to by the 'addrlen' argument.
|
|
*
|
|
* If the actual length of the address is greater than the length of the
|
|
* supplied sockaddr structure, the stored address will be truncated.
|
|
*
|
|
* If the socket has not been bound to a local name, the value stored in
|
|
* the object pointed to by address is unspecified.
|
|
*
|
|
* Input Parameters:
|
|
* psock Socket structure of the socket to be queried
|
|
* addr sockaddr structure to receive data [out]
|
|
* addrlen Length of sockaddr structure [in/out]
|
|
*
|
|
* Returned Value:
|
|
* On success, 0 is returned, the 'addr' argument points to the address
|
|
* of the socket, and the 'addrlen' argument points to the length of the
|
|
* address. Otherwise, a negated errno value is returned. See
|
|
* getsockname() for the list of appropriate error numbers.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int inet_getsockname(FAR struct socket *psock,
|
|
FAR struct sockaddr *addr,
|
|
FAR socklen_t *addrlen)
|
|
{
|
|
/* Handle by address domain */
|
|
|
|
switch (psock->s_domain)
|
|
{
|
|
#ifdef CONFIG_NET_IPv4
|
|
case PF_INET:
|
|
return ipv4_getsockname(psock, addr, addrlen);
|
|
break;
|
|
#endif
|
|
|
|
#ifdef CONFIG_NET_IPv6
|
|
case PF_INET6:
|
|
return ipv6_getsockname(psock, addr, addrlen);
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
return -EAFNOSUPPORT;
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: inet_getpeername
|
|
*
|
|
* Description:
|
|
* The inet_getpeername() function retrieves the remote-connected name of
|
|
* the specified INET socket, stores this address in the sockaddr
|
|
* structure pointed to by the 'addr' argument, and stores the length of
|
|
* this address in the object pointed to by the 'addrlen' argument.
|
|
*
|
|
* If the actual length of the address is greater than the length of the
|
|
* supplied sockaddr structure, the stored address will be truncated.
|
|
*
|
|
* If the socket has not been bound to a local name, the value stored in
|
|
* the object pointed to by address is unspecified.
|
|
*
|
|
* Parameters:
|
|
* psock Socket structure of the socket to be queried
|
|
* addr sockaddr structure to receive data [out]
|
|
* addrlen Length of sockaddr structure [in/out]
|
|
*
|
|
* Returned Value:
|
|
* On success, 0 is returned, the 'addr' argument points to the address
|
|
* of the socket, and the 'addrlen' argument points to the length of the
|
|
* address. Otherwise, a negated errno value is returned. See
|
|
* getpeername() for the list of appropriate error numbers.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int inet_getpeername(FAR struct socket *psock,
|
|
FAR struct sockaddr *addr,
|
|
FAR socklen_t *addrlen)
|
|
{
|
|
/* Handle by address domain */
|
|
|
|
switch (psock->s_domain)
|
|
{
|
|
#ifdef CONFIG_NET_IPv4
|
|
case PF_INET:
|
|
return ipv4_getpeername(psock, addr, addrlen);
|
|
break;
|
|
#endif
|
|
|
|
#ifdef CONFIG_NET_IPv6
|
|
case PF_INET6:
|
|
return ipv6_getpeername(psock, addr, addrlen);
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
return -EAFNOSUPPORT;
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: inet_listen
|
|
*
|
|
* Description:
|
|
* To accept connections, a socket is first created with psock_socket(), a
|
|
* willingness to accept incoming connections and a queue limit for
|
|
* incoming connections are specified with psock_listen(), and then the
|
|
* connections are accepted with psock_accept(). For the case of AFINET
|
|
* and AFINET6 sockets, psock_listen() calls this function. The
|
|
* psock_listen() call applies only to sockets of type SOCK_STREAM or
|
|
* SOCK_SEQPACKET.
|
|
*
|
|
* Input Parameters:
|
|
* psock Reference to an internal, boound socket structure.
|
|
* backlog The maximum length the queue of pending connections may grow.
|
|
* If a connection request arrives with the queue full, the client
|
|
* may receive an error with an indication of ECONNREFUSED or,
|
|
* if the underlying protocol supports retransmission, the request
|
|
* may be ignored so that retries succeed.
|
|
*
|
|
* Returned Value:
|
|
* On success, zero is returned. On error, a negated errno value is
|
|
* returned. See list() for the set of appropriate error values.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int inet_listen(FAR struct socket *psock, int backlog)
|
|
{
|
|
#if defined(CONFIG_NET_TCP) && defined(NET_TCP_HAVE_STACK)
|
|
FAR struct tcp_conn_s *conn;
|
|
int ret;
|
|
#endif
|
|
|
|
/* Verify that the sockfd corresponds to a connected SOCK_STREAM */
|
|
|
|
if (psock->s_type != SOCK_STREAM)
|
|
{
|
|
nerr("ERROR: Unsupported socket type: %d\n",
|
|
psock->s_type);
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
#ifdef CONFIG_NET_TCP
|
|
#ifdef NET_TCP_HAVE_STACK
|
|
conn = (FAR struct tcp_conn_s *)psock->s_conn;
|
|
|
|
if (conn->lport <= 0)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
#ifdef CONFIG_NET_TCPBACKLOG
|
|
/* Set up the backlog for this connection */
|
|
|
|
ret = tcp_backlogcreate(conn, backlog);
|
|
if (ret < 0)
|
|
{
|
|
nerr("ERROR: tcp_backlogcreate failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
/* Start listening to the bound port. This enables callbacks when
|
|
* accept() is called and enables poll()/select() logic.
|
|
*/
|
|
|
|
ret = tcp_listen(conn);
|
|
if (ret < 0)
|
|
{
|
|
nerr("ERROR: tcp_listen failed: %d\n", ret);
|
|
}
|
|
|
|
return ret;
|
|
#else
|
|
nwarn("WARNING: Stream socket support not available\n");
|
|
return -EOPNOTSUPP;
|
|
#endif /* NET_TCP_HAVE_STACK */
|
|
#else
|
|
nwarn("WARNING: Stream socket support not enabled\n");
|
|
return -EOPNOTSUPP;
|
|
#endif /* CONFIG_NET_TCP */
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: inet_connect
|
|
*
|
|
* Description:
|
|
* inet_connect() connects the local socket referred to by the structure
|
|
* 'psock' to the address specified by 'addr'. The addrlen argument
|
|
* specifies the size of 'addr'. The format of the address in 'addr' is
|
|
* determined by the address space of the socket 'psock'.
|
|
*
|
|
* If the socket 'psock' is of type SOCK_DGRAM then 'addr' is the address
|
|
* to which datagrams are sent by default, and the only address from which
|
|
* datagrams are received. If the socket is of type SOCK_STREAM or
|
|
* SOCK_SEQPACKET, this call attempts to make a connection to the socket
|
|
* that is bound to the address specified by 'addr'.
|
|
*
|
|
* Generally, connection-based protocol sockets may successfully
|
|
* inet_connect() only once; connectionless protocol sockets may use
|
|
* inet_connect() multiple times to change their association.
|
|
* Connectionless sockets may dissolve the association by connecting to
|
|
* an address with the sa_family member of sockaddr set to AF_UNSPEC.
|
|
*
|
|
* Input Parameters:
|
|
* psock - Pointer to a socket structure initialized by psock_socket()
|
|
* addr - Server address (form depends on type of socket). The upper
|
|
* socket layer has verified that this address is non-NULL.
|
|
* addrlen - Length of actual 'addr'
|
|
*
|
|
* Returned Value:
|
|
* 0 on success; a negated errno value on failue. See connect() for the
|
|
* list of appropriate errno values to be returned.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int inet_connect(FAR struct socket *psock,
|
|
FAR const struct sockaddr *addr, socklen_t addrlen)
|
|
{
|
|
FAR const struct sockaddr_in *inaddr = (FAR const struct sockaddr_in *)addr;
|
|
|
|
/* Verify that a valid address has been provided */
|
|
|
|
switch (inaddr->sin_family)
|
|
{
|
|
#ifdef CONFIG_NET_IPv4
|
|
case AF_INET:
|
|
{
|
|
if (addrlen < sizeof(struct sockaddr_in))
|
|
{
|
|
return -EBADF;
|
|
}
|
|
}
|
|
break;
|
|
#endif
|
|
|
|
#ifdef CONFIG_NET_IPv6
|
|
case AF_INET6:
|
|
{
|
|
if (addrlen < sizeof(struct sockaddr_in6))
|
|
{
|
|
return -EBADF;
|
|
}
|
|
}
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
DEBUGPANIC();
|
|
return -EAFNOSUPPORT;
|
|
}
|
|
|
|
/* Perform the connection depending on the protocol type */
|
|
|
|
switch (psock->s_type)
|
|
{
|
|
#if defined(CONFIG_NET_TCP) && defined(NET_TCP_HAVE_STACK)
|
|
case SOCK_STREAM:
|
|
{
|
|
/* Verify that the socket is not already connected */
|
|
|
|
if (_SS_ISCONNECTED(psock->s_flags))
|
|
{
|
|
return -EISCONN;
|
|
}
|
|
|
|
/* It's not ... Connect the TCP/IP socket */
|
|
|
|
return psock_tcp_connect(psock, addr);
|
|
}
|
|
#endif /* CONFIG_NET_TCP */
|
|
|
|
#if defined(CONFIG_NET_UDP) && defined(NET_UDP_HAVE_STACK)
|
|
case SOCK_DGRAM:
|
|
{
|
|
FAR struct udp_conn_s *conn;
|
|
int ret;
|
|
|
|
/* We will accept connecting to a addr == NULL for disconnection.
|
|
* However, the correct way is to disconnect is to provide an
|
|
* address with sa_family == AF_UNSPEC.
|
|
*/
|
|
|
|
if (addr != NULL && addr->sa_family == AF_UNSPEC)
|
|
{
|
|
addr = NULL;
|
|
}
|
|
|
|
/* Perform the connect/disconnect operation */
|
|
|
|
conn = (FAR struct udp_conn_s *)psock->s_conn;
|
|
ret = udp_connect(conn, addr);
|
|
if (ret < 0 || addr == NULL)
|
|
{
|
|
/* Failed to connect or explicitly disconnected */
|
|
|
|
psock->s_flags &= ~_SF_CONNECTED;
|
|
conn->flags &= ~_UDP_FLAG_CONNECTMODE;
|
|
}
|
|
else
|
|
{
|
|
/* Successfully connected */
|
|
|
|
psock->s_flags |= _SF_CONNECTED;
|
|
conn->flags |= _UDP_FLAG_CONNECTMODE;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#endif /* CONFIG_NET_UDP */
|
|
|
|
default:
|
|
return -EBADF;
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: inet_accept
|
|
*
|
|
* Description:
|
|
* The inet_accept function is used with connection-based socket types
|
|
* (SOCK_STREAM, SOCK_SEQPACKET and SOCK_RDM). It extracts the first
|
|
* connection request on the queue of pending connections, creates a new
|
|
* connected socket with mostly the same properties as 'sockfd', and
|
|
* allocates a new socket descriptor for the socket, which is returned. The
|
|
* newly created socket is no longer in the listening state. The original
|
|
* socket 'sockfd' is unaffected by this call. Per file descriptor flags
|
|
* are not inherited across an inet_accept.
|
|
*
|
|
* The 'sockfd' argument is a socket descriptor that has been created with
|
|
* socket(), bound to a local address with bind(), and is listening for
|
|
* connections after a call to listen().
|
|
*
|
|
* On return, the 'addr' structure is filled in with the address of the
|
|
* connecting entity. The 'addrlen' argument initially contains the size
|
|
* of the structure pointed to by 'addr'; on return it will contain the
|
|
* actual length of the address returned.
|
|
*
|
|
* If no pending connections are present on the queue, and the socket is
|
|
* not marked as non-blocking, inet_accept blocks the caller until a
|
|
* connection is present. If the socket is marked non-blocking and no
|
|
* pending connections are present on the queue, inet_accept returns
|
|
* EAGAIN.
|
|
*
|
|
* Input Parameters:
|
|
* psock Reference to the listening socket structure
|
|
* addr Receives the address of the connecting client
|
|
* addrlen Input: allocated size of 'addr', Return: returned size of 'addr'
|
|
* newsock Location to return the accepted socket information.
|
|
*
|
|
* Returned Value:
|
|
* Returns 0 (OK) on success. On failure, it returns a negated errno
|
|
* value. See accept() for a desrciption of the approriate error value.
|
|
*
|
|
* Assumptions:
|
|
* The network is locked.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int inet_accept(FAR struct socket *psock, FAR struct sockaddr *addr,
|
|
FAR socklen_t *addrlen, FAR struct socket *newsock)
|
|
{
|
|
#if defined(CONFIG_NET_TCP) && defined(NET_TCP_HAVE_STACK)
|
|
int ret;
|
|
#endif
|
|
|
|
/* Is the socket a stream? */
|
|
|
|
if (psock->s_type != SOCK_STREAM)
|
|
{
|
|
nerr("ERROR: Inappropriate socket type: %d\n", psock->s_type);
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
/* Verify that a valid memory block has been provided to receive the
|
|
* address
|
|
*/
|
|
|
|
if (addr != NULL)
|
|
{
|
|
/* If an address is provided, then the length must also be provided. */
|
|
|
|
DEBUGASSERT(addrlen > 0);
|
|
|
|
/* A valid length depends on the address domain */
|
|
|
|
switch (psock->s_domain)
|
|
{
|
|
#ifdef CONFIG_NET_IPv4
|
|
case PF_INET:
|
|
{
|
|
if (*addrlen < sizeof(struct sockaddr_in))
|
|
{
|
|
return -EBADF;
|
|
}
|
|
}
|
|
break;
|
|
#endif /* CONFIG_NET_IPv4 */
|
|
|
|
#ifdef CONFIG_NET_IPv6
|
|
case PF_INET6:
|
|
{
|
|
if (*addrlen < sizeof(struct sockaddr_in6))
|
|
{
|
|
return -EBADF;
|
|
}
|
|
}
|
|
break;
|
|
#endif /* CONFIG_NET_IPv6 */
|
|
|
|
default:
|
|
DEBUGPANIC();
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/* Initialize the socket structure. */
|
|
|
|
newsock->s_domain = psock->s_domain;
|
|
newsock->s_type = SOCK_STREAM;
|
|
newsock->s_sockif = psock->s_sockif;
|
|
|
|
/* Perform the correct accept operation for this address domain */
|
|
|
|
#ifdef CONFIG_NET_TCP
|
|
#ifdef NET_TCP_HAVE_STACK
|
|
/* Perform the local accept operation (the network locked must be locked
|
|
* by the caller).
|
|
*/
|
|
|
|
ret = psock_tcp_accept(psock, addr, addrlen, &newsock->s_conn);
|
|
if (ret < 0)
|
|
{
|
|
nerr("ERROR: psock_tcp_accept failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Begin monitoring for TCP connection events on the newly connected
|
|
* socket
|
|
*/
|
|
|
|
ret = tcp_start_monitor(newsock);
|
|
if (ret < 0)
|
|
{
|
|
/* tcp_start_monitor() can only fail on certain race conditions where
|
|
* the connection was lost just before this function was called. Undo
|
|
* everything we have done and return a failure.
|
|
*/
|
|
|
|
psock_close(newsock);
|
|
return ret;
|
|
}
|
|
|
|
return OK;
|
|
|
|
#else
|
|
nwarn("WARNING: SOCK_STREAM not supported in this configuration\n");
|
|
return -EOPNOTSUPP;
|
|
#endif /* NET_TCP_HAVE_STACK */
|
|
|
|
#else
|
|
nwarn("WARNING: TCP/IP not supported in this configuration\n");
|
|
return -EOPNOTSUPP;
|
|
#endif /* CONFIG_NET_TCP */
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: inet_pollsetup
|
|
*
|
|
* Description:
|
|
* Setup to monitor events on one socket
|
|
*
|
|
* Input Parameters:
|
|
* psock - The 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
|
|
*
|
|
****************************************************************************/
|
|
|
|
#if defined(NET_TCP_HAVE_STACK) || defined(NET_UDP_HAVE_STACK)
|
|
static inline int inet_pollsetup(FAR struct socket *psock,
|
|
FAR struct pollfd *fds)
|
|
{
|
|
#ifdef NET_TCP_HAVE_STACK
|
|
if (psock->s_type == SOCK_STREAM)
|
|
{
|
|
return tcp_pollsetup(psock, fds);
|
|
}
|
|
else
|
|
#endif /* NET_TCP_HAVE_STACK */
|
|
#ifdef NET_UDP_HAVE_STACK
|
|
if (psock->s_type != SOCK_STREAM)
|
|
{
|
|
return udp_pollsetup(psock, fds);
|
|
}
|
|
else
|
|
#endif /* NET_UDP_HAVE_STACK */
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
}
|
|
#endif /* NET_TCP_HAVE_STACK || NET_UDP_HAVE_STACK */
|
|
|
|
/****************************************************************************
|
|
* Name: inet_pollteardown
|
|
*
|
|
* Description:
|
|
* Teardown monitoring of events on an 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
|
|
*
|
|
****************************************************************************/
|
|
|
|
#if defined(NET_TCP_HAVE_STACK) || defined(NET_UDP_HAVE_STACK)
|
|
static inline int inet_pollteardown(FAR struct socket *psock,
|
|
FAR struct pollfd *fds)
|
|
{
|
|
#ifdef NET_TCP_HAVE_STACK
|
|
if (psock->s_type == SOCK_STREAM)
|
|
{
|
|
return tcp_pollteardown(psock, fds);
|
|
}
|
|
else
|
|
#endif /* NET_TCP_HAVE_STACK */
|
|
#ifdef NET_UDP_HAVE_STACK
|
|
if (psock->s_type == SOCK_DGRAM)
|
|
{
|
|
return udp_pollteardown(psock, fds);
|
|
}
|
|
else
|
|
#endif /* NET_UDP_HAVE_STACK */
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
}
|
|
#endif /* NET_TCP_HAVE_STACK || NET_UDP_HAVE_STACK */
|
|
|
|
/****************************************************************************
|
|
* Name: inet_poll
|
|
*
|
|
* Description:
|
|
* The standard poll() operation redirects operations on socket descriptors
|
|
* to net_poll which, indiectly, calls to function.
|
|
*
|
|
* Input Parameters:
|
|
* psock - An instance of the internal socket structure.
|
|
* fds - The structure describing the events to be monitored, OR NULL if
|
|
* this is a request to stop monitoring events.
|
|
* setup - true: Setup up the poll; false: Teardown the poll
|
|
*
|
|
* Returned Value:
|
|
* 0: Success; Negated errno on failure
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int inet_poll(FAR struct socket *psock, FAR struct pollfd *fds,
|
|
bool setup)
|
|
{
|
|
#if defined(NET_TCP_HAVE_STACK) || defined(NET_UDP_HAVE_STACK)
|
|
|
|
/* Check if we are setting up or tearing down the poll */
|
|
|
|
if (setup)
|
|
{
|
|
/* Perform the TCP/IP poll() setup */
|
|
|
|
return inet_pollsetup(psock, fds);
|
|
}
|
|
else
|
|
{
|
|
/* Perform the TCP/IP poll() teardown */
|
|
|
|
return inet_pollteardown(psock, fds);
|
|
}
|
|
#else
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
#endif /* NET_TCP_HAVE_STACK || !NET_UDP_HAVE_STACK */
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: inet_send
|
|
*
|
|
* Description:
|
|
* The inet_send() call may be used only when the 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 send() for the list of appropriate error
|
|
* values.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static ssize_t inet_send(FAR struct socket *psock, FAR const void *buf,
|
|
size_t len, int flags)
|
|
{
|
|
ssize_t ret;
|
|
|
|
switch (psock->s_type)
|
|
{
|
|
#ifdef CONFIG_NET_TCP
|
|
case SOCK_STREAM:
|
|
{
|
|
#ifdef CONFIG_NET_6LOWPAN
|
|
/* Try 6LoWPAN TCP packet send */
|
|
|
|
ret = psock_6lowpan_tcp_send(psock, buf, len);
|
|
|
|
#ifdef NET_TCP_HAVE_STACK
|
|
if (ret < 0)
|
|
{
|
|
/* TCP/IP packet send */
|
|
|
|
ret = psock_tcp_send(psock, buf, len);
|
|
}
|
|
#endif /* NET_TCP_HAVE_STACK */
|
|
#elif defined(NET_TCP_HAVE_STACK)
|
|
ret = psock_tcp_send(psock, buf, len);
|
|
#else
|
|
ret = -ENOSYS;
|
|
#endif /* CONFIG_NET_6LOWPAN */
|
|
}
|
|
break;
|
|
#endif /* CONFIG_NET_TCP */
|
|
|
|
#ifdef CONFIG_NET_UDP
|
|
case SOCK_DGRAM:
|
|
{
|
|
#if defined(CONFIG_NET_6LOWPAN)
|
|
/* Try 6LoWPAN UDP packet send */
|
|
|
|
ret = psock_6lowpan_udp_send(psock, buf, len);
|
|
|
|
#ifdef NET_UDP_HAVE_STACK
|
|
if (ret < 0)
|
|
{
|
|
/* UDP/IP packet send */
|
|
|
|
ret = psock_udp_send(psock, buf, len);
|
|
}
|
|
#endif /* NET_UDP_HAVE_STACK */
|
|
#elif defined(NET_UDP_HAVE_STACK)
|
|
/* Only UDP/IP packet send */
|
|
|
|
ret = psock_udp_send(psock, buf, len);
|
|
#else
|
|
ret = -ENOSYS;
|
|
#endif /* CONFIG_NET_6LOWPAN */
|
|
}
|
|
break;
|
|
#endif /* CONFIG_NET_UDP */
|
|
|
|
default:
|
|
{
|
|
/* EDESTADDRREQ. Signifies that the socket is not connection-mode
|
|
* and no peer address is set.
|
|
*/
|
|
|
|
nerr("ERROR: Bad socket type: %d\n", psock->s_type);
|
|
ret = -EDESTADDRREQ;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: inet_sendto
|
|
*
|
|
* Description:
|
|
* Implements the sendto() operation for the case of the AF_INET and
|
|
* AF_INET6 sockets.
|
|
*
|
|
* Input Parameters:
|
|
* psock A pointer to a NuttX-specific, internal socket structure
|
|
* buf Data to send
|
|
* len Length of data to send
|
|
* flags Send flags
|
|
* to Address of recipient
|
|
* tolen The length of the address structure
|
|
*
|
|
* Returned Value:
|
|
* On success, returns the number of characters sent. On error, a negated
|
|
* errno value is returned (see send_to() for the list of appropriate error
|
|
* values.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static ssize_t inet_sendto(FAR struct socket *psock, FAR const void *buf,
|
|
size_t len, int flags, FAR const struct sockaddr *to,
|
|
socklen_t tolen)
|
|
{
|
|
socklen_t minlen;
|
|
ssize_t nsent;
|
|
|
|
/* Verify that a valid address has been provided */
|
|
|
|
switch (to->sa_family)
|
|
{
|
|
#ifdef CONFIG_NET_IPv4
|
|
case AF_INET:
|
|
minlen = sizeof(struct sockaddr_in);
|
|
break;
|
|
#endif
|
|
|
|
#ifdef CONFIG_NET_IPv6
|
|
case AF_INET6:
|
|
minlen = sizeof(struct sockaddr_in6);
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
nerr("ERROR: Unrecognized address family: %d\n", to->sa_family);
|
|
return -EAFNOSUPPORT;
|
|
}
|
|
|
|
if (tolen < minlen)
|
|
{
|
|
nerr("ERROR: Invalid address length: %d < %d\n", tolen, minlen);
|
|
return -EBADF;
|
|
}
|
|
|
|
#ifdef CONFIG_NET_UDP
|
|
/* If this is a connected socket, then return EISCONN */
|
|
|
|
if (psock->s_type != SOCK_DGRAM)
|
|
{
|
|
nerr("ERROR: Connected socket\n");
|
|
return -EBADF;
|
|
}
|
|
|
|
/* Now handle the INET sendto() operation */
|
|
|
|
#if defined(CONFIG_NET_6LOWPAN)
|
|
/* Try 6LoWPAN UDP packet sendto() */
|
|
|
|
nsent = psock_6lowpan_udp_sendto(psock, buf, len, flags, to, minlen);
|
|
|
|
#ifdef NET_UDP_HAVE_STACK
|
|
if (nsent < 0)
|
|
{
|
|
/* UDP/IP packet sendto */
|
|
|
|
nsent = psock_udp_sendto(psock, buf, len, flags, to, tolen);
|
|
}
|
|
#endif /* NET_UDP_HAVE_STACK */
|
|
#elif defined(NET_UDP_HAVE_STACK)
|
|
nsent = psock_udp_sendto(psock, buf, len, flags, to, tolen);
|
|
#else
|
|
nwarn("WARNING: UDP not available in this configuiration\n");
|
|
nsent = -ENOSYS;
|
|
#endif /* CONFIG_NET_6LOWPAN */
|
|
#else
|
|
nwarn("WARNING: UDP not enabled in this configuiration\n");
|
|
nsent = -EISCONN;
|
|
#endif /* CONFIG_NET_UDP */
|
|
|
|
return nsent;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: inet_sendfile
|
|
*
|
|
* Description:
|
|
* The inet_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
|
|
static ssize_t inet_sendfile(FAR struct socket *psock,
|
|
FAR struct file *infile, FAR off_t *offset,
|
|
size_t count)
|
|
{
|
|
#if defined(CONFIG_NET_TCP) && !defined(CONFIG_NET_TCP_NO_STACK)
|
|
if (psock->s_type == SOCK_STREAM)
|
|
{
|
|
return tcp_sendfile(psock, infile, offset, count);
|
|
}
|
|
#endif
|
|
|
|
return -ENOSYS;
|
|
}
|
|
#endif
|
|
|
|
#endif /* NET_UDP_HAVE_STACK || NET_TCP_HAVE_STACK */
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: inet_sockif
|
|
*
|
|
* Description:
|
|
* Return the socket interface associated with the inet address family.
|
|
*
|
|
* Input Parameters:
|
|
* family - Socket address family
|
|
* type - Socket type
|
|
* protocol - Socket protocol
|
|
*
|
|
* Returned Value:
|
|
* On success, a non-NULL instance of struct sock_intf_s is returned. NULL
|
|
* is returned only if the address family is not supported.
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR const struct sock_intf_s *
|
|
inet_sockif(sa_family_t family, int type, int protocol)
|
|
{
|
|
DEBUGASSERT(family == PF_INET || family == PF_INET6);
|
|
|
|
#if defined(HAVE_PFINET_SOCKETS) && defined(CONFIG_NET_ICMP_SOCKET)
|
|
/* PF_INET, ICMP data gram sockets are a special case of raw sockets */
|
|
|
|
if (family == PF_INET && type == SOCK_DGRAM && protocol == IPPROTO_ICMP)
|
|
{
|
|
return &g_icmp_sockif;
|
|
}
|
|
else
|
|
#endif
|
|
#if defined(HAVE_PFINET6_SOCKETS) && defined(CONFIG_NET_ICMPv6_SOCKET)
|
|
/* PF_INET, ICMP data gram sockets are a special case of raw sockets */
|
|
|
|
if (family == PF_INET6 && type == SOCK_DGRAM && protocol == IPPROTO_ICMP6)
|
|
{
|
|
return &g_icmpv6_sockif;
|
|
}
|
|
else
|
|
#endif
|
|
#ifdef NET_UDP_HAVE_STACK
|
|
if (type == SOCK_DGRAM && (protocol == 0 || protocol == IPPROTO_UDP))
|
|
{
|
|
return &g_inet_sockif;
|
|
}
|
|
else
|
|
#endif
|
|
#ifdef NET_TCP_HAVE_STACK
|
|
if (type == SOCK_STREAM && (protocol == 0 || protocol == IPPROTO_TCP))
|
|
{
|
|
return &g_inet_sockif;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
#endif /* HAVE_INET_SOCKETS */
|