nuttx/net/inet/inet.h

/****************************************************************************
 * 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) || \
    defined(CONFIG_NET_MLD)
/* IPv6 Multi-cast IP addresses.  See RFC 2375 */

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

#ifdef CONFIG_NET_ETHERNET
/* IPv6 Multi-cast Ethernet addresses.  Formed from the 16-bit prefix:
 *
 *   0x33:0x33:xx:xx:xx:xx:
 *
 * and the last 32-bits of the IPv6 IP address
 */

EXTERN const struct ether_addr g_ipv6_ethallnodes;     /* All link local nodes */
EXTERN const struct ether_addr g_ipv6_ethallrouters;   /* All link local routers */

#endif /* CONFIG_NET_ETHERNET */
#endif /* CONFIG_NET_ICMPv6_AUTOCONF || CONFIG_NET_ICMPv6_ROUTER || CONFIG_NET_MLD */
#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_setsockopt and ipv6_setsockopt
 *
 * Description:
 *   ipv4/6_setsockopt() sets the IPv4- or IPv6-protocol socket option
 *   specified by the 'option' argument to the value pointed to by the
 *   'value' argument for the socket specified by the 'psock' argument.
 *
 *   See <netinet/in.h> for the a complete list of values of IPv4 and IPv6
 *   protocol socket options.
 *
 * Input Parameters:
 *   psock     Socket structure of socket to operate on
 *   option    identifies the option to set
 *   value     Points to the argument value
 *   value_len The length of the argument value
 *
 * Returned Value:
 *   Returns zero (OK) on success.  On failure, it returns a negated errno
 *   value to indicate the nature of the error.  See psock_setcockopt() for
 *   the list of possible error values.
 *
 ****************************************************************************/

#ifdef CONFIG_NET_IPv4
int ipv4_setsockopt(FAR struct socket *psock, int option,
                    FAR const void *value, socklen_t value_len);
#endif
#ifdef CONFIG_NET_IPv6
int ipv6_setsockopt(FAR struct socket *psock, int option,
                    FAR const void *value, socklen_t value_len);
#endif

/****************************************************************************
 * Name: ipv4_getsockname and ipv6_sockname
 *
 * Description:
 *   The ipv4_getsockname() and ipv6_getsockname() 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: ipv4_getpeername and ipv6_peername
 *
 * Description:
 *   The ipv4_getpeername() and ipv6_peername() function retrieve the
 *   remote-connected name of the specified INET socket.
 *
 * 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
 *   getpeername() for the list of returned error values.
 *
 ****************************************************************************/

#ifdef CONFIG_NET_IPv4
int ipv4_getpeername(FAR struct socket *psock, FAR struct sockaddr *addr,
                     FAR socklen_t *addrlen);
#endif
#ifdef CONFIG_NET_IPv6
int ipv6_getpeername(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 */