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nuttx/net/inet/inet_sockif.c
Peter van der Perk 55d9e5f7af net: Add SocketCAN support
2020-06-15 08:07:19 -06:00

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/****************************************************************************
* net/inet/inet_sockif.c
*
* Copyright (C) 2017-2018 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <stdbool.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/net/net.h>
#include "tcp/tcp.h"
#include "udp/udp.h"
#include "icmp/icmp.h"
#include "icmpv6/icmpv6.h"
#include "sixlowpan/sixlowpan.h"
#include "socket/socket.h"
#include "inet/inet.h"
#ifdef HAVE_INET_SOCKETS
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
#if defined(NET_UDP_HAVE_STACK) || defined(NET_TCP_HAVE_STACK)
static int inet_setup(FAR struct socket *psock, int protocol);
static sockcaps_t inet_sockcaps(FAR struct socket *psock);
static void inet_addref(FAR struct socket *psock);
static int inet_bind(FAR struct socket *psock,
FAR const struct sockaddr *addr, socklen_t addrlen);
static int inet_getsockname(FAR struct socket *psock,
FAR struct sockaddr *addr, FAR socklen_t *addrlen);
static int inet_getpeername(FAR struct socket *psock,
FAR struct sockaddr *addr, FAR socklen_t *addrlen);
static int inet_listen(FAR struct socket *psock, int backlog);
static int inet_connect(FAR struct socket *psock,
FAR const struct sockaddr *addr, socklen_t addrlen);
static int inet_accept(FAR struct socket *psock,
FAR struct sockaddr *addr, FAR socklen_t *addrlen,
FAR struct socket *newsock);
static int inet_poll(FAR struct socket *psock,
FAR struct pollfd *fds, bool setup);
static ssize_t inet_send(FAR struct socket *psock, FAR const void *buf,
size_t len, int flags);
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);
#ifdef CONFIG_NET_SENDFILE
static ssize_t inet_sendfile(FAR struct socket *psock,
FAR struct file *infile, FAR off_t *offset,
size_t count);
#endif
static ssize_t inet_recvfrom(FAR struct socket *psock, FAR void *buf,
size_t len, int flags, FAR struct sockaddr *from,
FAR socklen_t *fromlen);
/****************************************************************************
* Private Data
****************************************************************************/
static const struct sock_intf_s g_inet_sockif =
{
inet_setup, /* si_setup */
inet_sockcaps, /* si_sockcaps */
inet_addref, /* si_addref */
inet_bind, /* si_bind */
inet_getsockname, /* si_getsockname */
inet_getpeername, /* si_getpeername */
inet_listen, /* si_listen */
inet_connect, /* si_connect */
inet_accept, /* si_accept */
inet_poll, /* si_poll */
inet_send, /* si_send */
inet_sendto, /* si_sendto */
#ifdef CONFIG_NET_SENDFILE
inet_sendfile, /* si_sendfile */
#endif
inet_recvfrom, /* si_recvfrom */
#ifdef CONFIG_NET_CMSG
NULL, /* si_recvmsg */
NULL, /* si_sendmsg */
#endif
inet_close /* si_close */
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: inet_tcp_alloc
*
* Description:
* Allocate and attach a TCP connection structure.
*
****************************************************************************/
#ifdef NET_TCP_HAVE_STACK
static int inet_tcp_alloc(FAR struct socket *psock)
{
/* Allocate the TCP connection structure */
FAR struct tcp_conn_s *conn = tcp_alloc(psock->s_domain);
if (conn == NULL)
{
/* Failed to reserve a connection structure */
nerr("ERROR: Failed to reserve TCP connection structure\n");
return -ENOMEM;
}
/* Set the reference count on the connection structure. This reference
* count will be incremented only if the socket is dup'ed
*/
DEBUGASSERT(conn->crefs == 0);
conn->crefs = 1;
/* Save the pre-allocated connection in the socket structure */
psock->s_conn = conn;
return OK;
}
#endif /* NET_TCP_HAVE_STACK */
/****************************************************************************
* Name: inet_udp_alloc
*
* Description:
* Allocate and attach a UDP connection structure.
*
****************************************************************************/
#ifdef NET_UDP_HAVE_STACK
static int inet_udp_alloc(FAR struct socket *psock)
{
/* Allocate the UDP connection structure */
FAR struct udp_conn_s *conn = udp_alloc(psock->s_domain);
if (conn == NULL)
{
/* Failed to reserve a connection structure */
nerr("ERROR: Failed to reserve UDP connection structure\n");
return -ENOMEM;
}
/* Set the reference count on the connection structure. This reference
* count will be incremented only if the socket is dup'ed
*/
DEBUGASSERT(conn->crefs == 0);
conn->crefs = 1;
/* Save the pre-allocated connection in the socket structure */
psock->s_conn = conn;
return OK;
}
#endif /* NET_UDP_HAVE_STACK */
/****************************************************************************
* Name: inet_setup
*
* Description:
* Called for socket() to verify that the provided socket type and
* protocol are usable by this address family. Perform any family-
* specific socket fields.
*
* NOTE: This is common logic for both the AF_INET and AF_INET6 address
* families.
*
* Input Parameters:
* psock A pointer to a user allocated socket structure to be
* initialized.
* protocol (see sys/socket.h)
*
* Returned Value:
* Zero (OK) is returned on success. Otherwise, a negated errno value is
* returned.
*
****************************************************************************/
static int inet_setup(FAR struct socket *psock, int protocol)
{
/* Allocate the appropriate connection structure. This reserves the
* the connection structure is is unallocated at this point. It will
* not actually be initialized until the socket is connected.
*
* REVISIT: Only SOCK_STREAM and SOCK_DGRAM are supported.
*/
switch (psock->s_type)
{
#ifdef CONFIG_NET_TCP
case SOCK_STREAM:
if (protocol != 0 && protocol != IPPROTO_TCP)
{
nerr("ERROR: Unsupported stream protocol: %d\n", protocol);
return -EPROTONOSUPPORT;
}
#ifdef NET_TCP_HAVE_STACK
/* Allocate and attach the TCP connection structure */
return inet_tcp_alloc(psock);
#else
nwarn("WARNING: SOCK_STREAM disabled\n");
return -ENETDOWN;
#endif
#endif /* CONFIG_NET_TCP */
#ifdef CONFIG_NET_UDP
case SOCK_DGRAM:
if (protocol != 0 && protocol != IPPROTO_UDP)
{
nerr("ERROR: Unsupported datagram protocol: %d\n", protocol);
return -EPROTONOSUPPORT;
}
#ifdef NET_UDP_HAVE_STACK
/* Allocate and attach the UDP connection structure */
return inet_udp_alloc(psock);
#else
nwarn("WARNING: SOCK_DGRAM disabled\n");
return -ENETDOWN;
#endif
#endif /* CONFIG_NET_UDP */
default:
nerr("ERROR: Unsupported type: %d\n", psock->s_type);
return -EPROTONOSUPPORT;
}
}
/****************************************************************************
* Name: inet_sockcaps
*
* Description:
* Return the bit encoded capabilities of this socket.
*
* Input Parameters:
* psock - Socket structure of the socket whose capabilities are being
* queried.
*
* Returned Value:
* The non-negative set of socket cababilities is returned.
*
****************************************************************************/
static sockcaps_t inet_sockcaps(FAR struct socket *psock)
{
switch (psock->s_type)
{
#ifdef NET_TCP_HAVE_STACK
case SOCK_STREAM:
return SOCKCAP_NONBLOCKING;
#endif
#ifdef NET_UDP_HAVE_STACK
case SOCK_DGRAM:
return SOCKCAP_NONBLOCKING;
#endif
default:
return 0;
}
}
/****************************************************************************
* Name: inet_addref
*
* Description:
* Increment the reference count on the underlying connection structure.
*
* Input Parameters:
* psock - Socket structure of the socket whose reference count will be
* incremented.
*
* Returned Value:
* None
*
****************************************************************************/
static void inet_addref(FAR struct socket *psock)
{
DEBUGASSERT(psock != NULL && psock->s_conn != NULL);
#ifdef NET_TCP_HAVE_STACK
if (psock->s_type == SOCK_STREAM)
{
FAR struct tcp_conn_s *conn = psock->s_conn;
DEBUGASSERT(conn->crefs > 0 && conn->crefs < 255);
conn->crefs++;
}
else
#endif
#ifdef NET_UDP_HAVE_STACK
if (psock->s_type == SOCK_DGRAM)
{
FAR struct udp_conn_s *conn = psock->s_conn;
DEBUGASSERT(conn->crefs > 0 && conn->crefs < 255);
conn->crefs++;
}
else
#endif
{
nerr("ERROR: Unsupported type: %d\n", psock->s_type);
}
}
/****************************************************************************
* Name: inet_bind
*
* Description:
* inet_bind() gives the socket 'psock' the local address 'addr'. 'addr'
* is 'addrlen' bytes long. Traditionally, this is called "assigning a
* name to a socket." When a socket is created with socket(), it exists
* in a name space (address family) but has no name assigned.
*
* Input Parameters:
* psock Socket structure of the socket to bind
* addr Socket local address
* addrlen Length of 'addr'
*
* Returned Value:
* 0 on success; A negated errno value is returned on failure. See
* bind() for a list a appropriate error values.
*
****************************************************************************/
static int inet_bind(FAR struct socket *psock,
FAR const struct sockaddr *addr, socklen_t addrlen)
{
int minlen;
int ret;
/* Verify that a valid address has been provided */
switch (addr->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", addr->sa_family);
return -EAFNOSUPPORT;
}
if (addrlen < minlen)
{
nerr("ERROR: Invalid address length: %d < %d\n", addrlen, minlen);
return -EBADF;
}
/* Perform the binding depending on the protocol type */
switch (psock->s_type)
{
#ifdef CONFIG_NET_TCP
case SOCK_STREAM:
{
#ifdef NET_TCP_HAVE_STACK
/* Bind a TCP/IP stream socket. */
ret = tcp_bind(psock->s_conn, addr);
#else
nwarn("WARNING: TCP/IP stack is not available in this "
"configuration\n");
return -ENOSYS;
#endif
}
break;
#endif /* CONFIG_NET_TCP */
#ifdef CONFIG_NET_UDP
case SOCK_DGRAM:
{
#ifdef NET_UDP_HAVE_STACK
/* Bind a UDP/IP datagram socket */
ret = udp_bind(psock->s_conn, addr);
#else
nwarn("WARNING: UDP stack is not available in this "
"configuration\n");
ret = -ENOSYS;
#endif
}
break;
#endif /* CONFIG_NET_UDP */
default:
nerr("ERROR: Unsupported socket type: %d\n", psock->s_type);
ret = -EBADF;
break;
}
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 failure. 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 */
conn->flags &= ~_UDP_FLAG_CONNECTMODE;
}
else
{
/* Successfully 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 appropriate 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_crefs = 1;
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, flags);
}
#endif /* NET_TCP_HAVE_STACK */
#elif defined(NET_TCP_HAVE_STACK)
ret = psock_tcp_send(psock, buf, len, flags);
#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 = _SS_ISCONNECTED(psock->s_flags) ?
psock_udp_sendto(psock, buf, len, 0, NULL, 0) : -ENOTCONN;
}
#endif /* NET_UDP_HAVE_STACK */
#elif defined(NET_UDP_HAVE_STACK)
/* Only UDP/IP packet send */
ret = _SS_ISCONNECTED(psock->s_flags) ?
psock_udp_sendto(psock, buf, len, 0, NULL, 0) : -ENOTCONN;
#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
/****************************************************************************
* Name: inet_recvfrom
*
* Description:
* Implements the socket recvfrom interface for the case of the AF_INET
* and AF_INET6 address families. inet_recvfrom() receives messages from
* a socket, and may be used to receive data on a socket whether or not it
* is connection-oriented.
*
* If 'from' is not NULL, and the underlying protocol provides the source
* address, this source address is filled in. The argument 'fromlen' is
* initialized to the size of the buffer associated with from, and
* modified on return to indicate the actual size of the address stored
* there.
*
* Input Parameters:
* psock A pointer to a NuttX-specific, internal socket structure
* buf Buffer to receive data
* len Length of buffer
* flags Receive flags
* from Address of source (may be NULL)
* fromlen The length of the address structure
*
* Returned Value:
* On success, returns the number of characters received. If no data is
* available to be received and the peer has performed an orderly shutdown,
* recv() will return 0. Otherwise, on errors, a negated errno value is
* returned (see recvfrom() for the list of appropriate error values).
*
****************************************************************************/
static ssize_t inet_recvfrom(FAR struct socket *psock, FAR void *buf,
size_t len, int flags,
FAR struct sockaddr *from,
FAR socklen_t *fromlen)
{
ssize_t ret;
/* If a 'from' address has been provided, verify that it is large
* enough to hold this address family.
*/
if (from)
{
socklen_t minlen;
/* Get the minimum socket length */
switch (psock->s_domain)
{
#ifdef CONFIG_NET_IPv4
case PF_INET:
{
minlen = sizeof(struct sockaddr_in);
}
break;
#endif
#ifdef CONFIG_NET_IPv6
case PF_INET6:
{
minlen = sizeof(struct sockaddr_in6);
}
break;
#endif
default:
DEBUGPANIC();
return -EINVAL;
}
if (*fromlen < minlen)
{
return -EINVAL;
}
}
/* Read from the network interface driver buffer.
* Or perform the TCP/IP or UDP recv() operation.
*/
switch (psock->s_type)
{
#ifdef CONFIG_NET_TCP
case SOCK_STREAM:
{
#ifdef NET_TCP_HAVE_STACK
ret = psock_tcp_recvfrom(psock, buf, len, flags, from, fromlen);
#else
ret = -ENOSYS;
#endif
}
break;
#endif /* CONFIG_NET_TCP */
#ifdef CONFIG_NET_UDP
case SOCK_DGRAM:
{
#ifdef NET_UDP_HAVE_STACK
ret = psock_udp_recvfrom(psock, buf, len, flags, from, fromlen);
#else
ret = -ENOSYS;
#endif
}
break;
#endif /* CONFIG_NET_UDP */
default:
{
nerr("ERROR: Unsupported socket type: %d\n", psock->s_type);
ret = -ENOSYS;
}
break;
}
return ret;
}
#endif /* NET_UDP_HAVE_STACK || NET_TCP_HAVE_STACK */
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: inet_close
*
* Description:
* Performs the close operation on an AF_INET or AF_INET6 socket instance
*
* Input Parameters:
* psock Socket instance
*
* Returned Value:
* 0 on success; -1 on error with errno set appropriately.
*
* Assumptions:
*
****************************************************************************/
int inet_close(FAR struct socket *psock)
{
/* Perform some pre-close operations for the AF_INET/AF_INET6 address
* types.
*/
switch (psock->s_type)
{
#ifdef CONFIG_NET_TCP
case SOCK_STREAM:
{
#ifdef NET_TCP_HAVE_STACK
FAR struct tcp_conn_s *conn = psock->s_conn;
int ret;
/* Is this the last reference to the connection structure (there
* could be more if the socket was dup'ed).
*/
if (conn->crefs <= 1)
{
/* Yes... Clost the socket */
ret = tcp_close(psock);
if (ret < 0)
{
/* This would normally occur only if there is a timeout
* from a lingering close.
*/
nerr("ERROR: tcp_close failed: %d\n", ret);
return ret;
}
}
else
{
/* No.. Just decrement the reference count */
conn->crefs--;
/* Stop monitor for this socket only */
tcp_close_monitor(psock);
}
#else
nwarn("WARNING: SOCK_STREAM support is not available in this "
"configuration\n");
return -EAFNOSUPPORT;
#endif /* NET_TCP_HAVE_STACK */
}
break;
#endif /* CONFIG_NET_TCP */
#ifdef CONFIG_NET_UDP
case SOCK_DGRAM:
{
#ifdef NET_UDP_HAVE_STACK
FAR struct udp_conn_s *conn = psock->s_conn;
int ret;
/* Is this the last reference to the connection structure (there
* could be more if the socket was dup'ed).
*/
if (conn->crefs <= 1)
{
/* Yes... Clost the socket */
ret = udp_close(psock);
if (ret < 0)
{
/* This would normally occur only if there is a timeout
* from a lingering close.
*/
nerr("ERROR: udp_close failed: %d\n", ret);
return ret;
}
}
else
{
/* No.. Just decrement the reference count */
conn->crefs--;
}
#else
nwarn("WARNING: SOCK_DGRAM support is not available in this "
"configuration\n");
return -EAFNOSUPPORT;
#endif /* NET_UDP_HAVE_STACK */
}
break;
#endif /* CONFIG_NET_UDP */
default:
return -EBADF;
}
return OK;
}
/****************************************************************************
* 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 */
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