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nuttx/net/inet/inet.h

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/****************************************************************************
* net/inet/inet.h
*
* Copyright (C) 2007-2009, 2011-2014 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.
*
****************************************************************************/
#ifndef __NET_INET_INET_H
#define __NET_INET_INET_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <nuttx/net/net.h>
#include <nuttx/net/ip.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration */
#undef HAVE_INET_SOCKETS
#undef HAVE_PFINET_SOCKETS
#undef HAVE_PFINET6_SOCKETS
#if defined(CONFIG_NET_IPv4) || defined(CONFIG_NET_IPv6)
# define HAVE_INET_SOCKETS
# if defined(CONFIG_NET_IPv4)
# define HAVE_PFINET_SOCKETS
# endif
# if defined(CONFIG_NET_IPv6)
# define HAVE_PFINET6_SOCKETS
# endif
#endif
/****************************************************************************
* Public Data
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
#ifdef CONFIG_NET_IPv4
/* Increasing number used for the IP ID field. */
EXTERN uint16_t g_ipid;
#endif /* CONFIG_NET_IPv4 */
/* Well-known IPv6 addresses */
#ifdef CONFIG_NET_IPv6
EXTERN const net_ipv6addr_t g_ipv6_unspecaddr; /* An address of all zeroes */
EXTERN const net_ipv6addr_t g_ipv6_allnodes; /* All link local nodes */
#if defined(CONFIG_NET_ICMPv6_AUTOCONF) || defined(CONFIG_NET_ICMPv6_ROUTER)
EXTERN const net_ipv6addr_t g_ipv6_allrouters; /* All link local routers */
#ifdef CONFIG_NET_ICMPv6_AUTOCONF
EXTERN const net_ipv6addr_t g_ipv6_llnetmask; /* Netmask for local link address */
#endif
#endif
#endif /* CONFIG_NET_IPv6 */
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#if defined(CONFIG_NET_TCP) && !defined(CONFIG_NET_TCP_NO_STACK)
struct tcp_conn_s; /* Forward reference */
#endif
struct socket; /* Forward reference */
/****************************************************************************
* Name: inet_setipid
*
* Description:
* This function may be used at boot time to set the initial ip_id.
*
* Assumptions:
*
****************************************************************************/
void inet_setipid(uint16_t id);
/****************************************************************************
* 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);
/****************************************************************************
* Name: ipv4_getsockname and ipv6_sockname
*
* Description:
* The ipv4_getsockname() and ipv6_getsocknam() function retrieve the
* locally-bound name of the specified INET socket.
*
* Input Parameters:
* psock Point to the socket structure instance [in]
* 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 returned error values.
*
****************************************************************************/
#ifdef CONFIG_NET_IPv4
int ipv4_getsockname(FAR struct socket *psock, FAR struct sockaddr *addr,
FAR socklen_t *addrlen);
#endif
#ifdef CONFIG_NET_IPv6
int ipv6_getsockname(FAR struct socket *psock, FAR struct sockaddr *addr,
FAR socklen_t *addrlen);
#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).
*
****************************************************************************/
ssize_t inet_recvfrom(FAR struct socket *psock, FAR void *buf, size_t len,
int flags, FAR struct sockaddr *from,
FAR socklen_t *fromlen);
/****************************************************************************
* 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);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __NET_INET_INET_H */
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