501 lines
18 KiB
C
501 lines
18 KiB
C
/****************************************************************************
|
|
* net/icmpv6/icmpv6_sockif.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <stdbool.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/mm/iob.h>
|
|
#include <nuttx/net/net.h>
|
|
#include <socket/socket.h>
|
|
|
|
#include "icmpv6/icmpv6.h"
|
|
|
|
#ifdef CONFIG_NET_ICMPv6_SOCKET
|
|
|
|
/****************************************************************************
|
|
* Private Function Prototypes
|
|
****************************************************************************/
|
|
|
|
static int icmpv6_setup(FAR struct socket *psock, int protocol);
|
|
static sockcaps_t icmpv6_sockcaps(FAR struct socket *psock);
|
|
static void icmpv6_addref(FAR struct socket *psock);
|
|
static int icmpv6_bind(FAR struct socket *psock,
|
|
FAR const struct sockaddr *addr, socklen_t addrlen);
|
|
static int icmpv6_getsockname(FAR struct socket *psock,
|
|
FAR struct sockaddr *addr, FAR socklen_t *addrlen);
|
|
static int icmpv6_getpeername(FAR struct socket *psock,
|
|
FAR struct sockaddr *addr, FAR socklen_t *addrlen);
|
|
static int icmpv6_listen(FAR struct socket *psock, int backlog);
|
|
static int icmpv6_connect(FAR struct socket *psock,
|
|
FAR const struct sockaddr *addr, socklen_t addrlen);
|
|
static int icmpv6_accept(FAR struct socket *psock,
|
|
FAR struct sockaddr *addr, FAR socklen_t *addrlen,
|
|
FAR struct socket *newsock);
|
|
static int icmpv6_netpoll(FAR struct socket *psock,
|
|
FAR struct pollfd *fds, bool setup);
|
|
static int icmpv6_close(FAR struct socket *psock);
|
|
|
|
/****************************************************************************
|
|
* Public Data
|
|
****************************************************************************/
|
|
|
|
const struct sock_intf_s g_icmpv6_sockif =
|
|
{
|
|
icmpv6_setup, /* si_setup */
|
|
icmpv6_sockcaps, /* si_sockcaps */
|
|
icmpv6_addref, /* si_addref */
|
|
icmpv6_bind, /* si_bind */
|
|
icmpv6_getsockname, /* si_getsockname */
|
|
icmpv6_getpeername, /* si_getpeername */
|
|
icmpv6_listen, /* si_listen */
|
|
icmpv6_connect, /* si_connect */
|
|
icmpv6_accept, /* si_accept */
|
|
icmpv6_netpoll, /* si_poll */
|
|
icmpv6_sendmsg, /* si_sendmsg */
|
|
icmpv6_recvmsg, /* si_recvmsg */
|
|
icmpv6_close, /* si_close */
|
|
icmpv6_ioctl /* si_ioctl */
|
|
};
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: icmpv6_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.
|
|
*
|
|
* 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 icmpv6_setup(FAR struct socket *psock, int protocol)
|
|
{
|
|
/* Only SOCK_DGRAM and IPPROTO_ICMP6 are supported */
|
|
|
|
if (psock->s_type == SOCK_DGRAM && protocol == IPPROTO_ICMP6)
|
|
{
|
|
/* Allocate the IPPROTO_ICMP6 socket connection structure and save in
|
|
* the new socket instance.
|
|
*/
|
|
|
|
FAR struct icmpv6_conn_s *conn = icmpv6_alloc();
|
|
if (conn == NULL)
|
|
{
|
|
/* Failed to reserve a connection structure */
|
|
|
|
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;
|
|
}
|
|
else
|
|
{
|
|
return -EPROTONOSUPPORT;
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: icmpv6_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 set of socket cababilities is returned.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static sockcaps_t icmpv6_sockcaps(FAR struct socket *psock)
|
|
{
|
|
return SOCKCAP_NONBLOCKING;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: icmpv6_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 icmpv6_addref(FAR struct socket *psock)
|
|
{
|
|
FAR struct icmpv6_conn_s *conn;
|
|
|
|
DEBUGASSERT(psock != NULL && psock->s_conn != NULL);
|
|
|
|
conn = psock->s_conn;
|
|
DEBUGASSERT(conn->crefs > 0 && conn->crefs < 255);
|
|
conn->crefs++;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: icmpv6_connect
|
|
*
|
|
* Description:
|
|
* icmpv6_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
|
|
* icmpv6_connect() only once; connectionless protocol sockets may use
|
|
* icmpv6_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)
|
|
* 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 icmpv6_connect(FAR struct socket *psock,
|
|
FAR const struct sockaddr *addr, socklen_t addrlen)
|
|
{
|
|
return -EAFNOSUPPORT;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: icmpv6_accept
|
|
*
|
|
* Description:
|
|
* The icmpv6_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 icmpv6_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, icmpv6_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, icmpv6_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 description of the appropriate error value.
|
|
*
|
|
* Assumptions:
|
|
* The network is locked.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int icmpv6_accept(FAR struct socket *psock, FAR struct sockaddr *addr,
|
|
FAR socklen_t *addrlen, FAR struct socket *newsock)
|
|
{
|
|
return -EAFNOSUPPORT;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: icmpv6_bind
|
|
*
|
|
* Description:
|
|
* icmpv6_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 icmpv6_bind(FAR struct socket *psock,
|
|
FAR const struct sockaddr *addr,
|
|
socklen_t addrlen)
|
|
{
|
|
/* An ICMPv6 socket cannot be bound to a local address */
|
|
|
|
return -EBADF;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: icmpv6_getsockname
|
|
*
|
|
* Description:
|
|
* The icmpv6_getsockname() function retrieves the locally-bound name of
|
|
* the specified packet 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 icmpv6_getsockname(FAR struct socket *psock,
|
|
FAR struct sockaddr *addr, FAR socklen_t *addrlen)
|
|
{
|
|
return -EAFNOSUPPORT;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: icmpv6_getpeername
|
|
*
|
|
* Description:
|
|
* The icmpv6_getpeername() function retrieves the remote-connected name of
|
|
* the specified packet 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 icmpv6_getpeername(FAR struct socket *psock,
|
|
FAR struct sockaddr *addr, FAR socklen_t *addrlen)
|
|
{
|
|
return -EAFNOSUPPORT;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: icmpv6_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 raw
|
|
* packet 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 listen() for the set of appropriate error values.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int icmpv6_listen(FAR struct socket *psock, int backlog)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: icmpv6_netpoll
|
|
*
|
|
* 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 icmpv6_netpoll(FAR struct socket *psock, FAR struct pollfd *fds,
|
|
bool setup)
|
|
{
|
|
/* Check if we are setting up or tearing down the poll */
|
|
|
|
if (setup)
|
|
{
|
|
/* Perform the ICMPv6 poll() setup */
|
|
|
|
return icmpv6_pollsetup(psock, fds);
|
|
}
|
|
else
|
|
{
|
|
/* Perform the ICMPv6 poll() teardown */
|
|
|
|
return icmpv6_pollteardown(psock, fds);
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: icmpv6_close
|
|
*
|
|
* Description:
|
|
* Performs the close operation on a raw packet socket instance
|
|
*
|
|
* Input Parameters:
|
|
* psock Socket instance
|
|
*
|
|
* Returned Value:
|
|
* 0 on success; a negated errno value is returned on any failure.
|
|
*
|
|
* Assumptions:
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int icmpv6_close(FAR struct socket *psock)
|
|
{
|
|
FAR struct icmpv6_conn_s *conn;
|
|
|
|
DEBUGASSERT(psock != NULL && psock->s_conn != NULL);
|
|
conn = psock->s_conn;
|
|
|
|
/* Is this the last reference to the connection structure (there could be\
|
|
* more if the socket was dup'ed).
|
|
*/
|
|
|
|
DEBUGASSERT(conn->crefs > 0);
|
|
|
|
if (conn->crefs <= 1)
|
|
{
|
|
/* Yes... free any read-ahead data */
|
|
|
|
iob_free_queue(&conn->readahead, IOBUSER_NET_SOCK_ICMPv6);
|
|
|
|
/* Then free the connection structure */
|
|
|
|
conn->crefs = 0; /* No more references on the connection */
|
|
icmpv6_free(psock->s_conn); /* Free network resources */
|
|
}
|
|
else
|
|
{
|
|
/* No.. Just decrement the reference count */
|
|
|
|
conn->crefs--;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
#endif /* CONFIG_NET_ICMPv6_SOCKET */
|