nuttx/net/icmpv6/icmpv6.h

747 lines
25 KiB
C

/****************************************************************************
* net/icmpv6/icmpv6.h
*
* Copyright (C) 2015, 2017-2019 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_ICMPv6_ICMPv6_H
#define __NET_ICMPv6_ICMPv6_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
#include <semaphore.h>
#include <queue.h>
#include <assert.h>
#include <nuttx/mm/iob.h>
#include <nuttx/net/ip.h>
#include <nuttx/net/netdev.h>
#if defined(CONFIG_NET_ICMPv6) && !defined(CONFIG_NET_ICMPv6_NO_STACK)
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define NET_ICMPv6_HAVE_STACK 1
/* Allocate a new ICMPv6 data callback */
#define icmpv6_callback_alloc(dev, conn) \
devif_callback_alloc((dev), &(conn)->list)
#define icmpv6_callback_free(dev, conn, cb) \
devif_conn_callback_free((dev), (cb), &(conn)->list)
/****************************************************************************
* Public Type Definitions
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_SOCKET
/* Representation of a IPPROTO_ICMP socket connection */
struct devif_callback_s; /* Forward reference */
struct icmpv6_conn_s
{
/* Common prologue of all connection structures. */
dq_entry_t node; /* Supports a double linked list */
/* This is a list of ICMPV6 callbacks. Each callback represents a thread
* that is stalled, waiting for a device-specific event.
*/
FAR struct devif_callback_s *list;
/* ICMPv6-specific content follows */
uint16_t id; /* ICMPv6 ECHO request ID */
uint8_t nreqs; /* Number of requests with no response received */
uint8_t crefs; /* Reference counts on this instance */
/* The device that the ICMPv6 request was sent on */
FAR struct net_driver_s *dev; /* Needed to free the callback structure */
#ifdef CONFIG_MM_IOB
/* ICMPv6 response read-ahead list. A singly linked list of type struct
* iob_qentry_s where the ICMPv6 read-ahead data for the current ID is
* retained.
*/
struct iob_queue_s readahead; /* Read-ahead buffering */
#endif
};
#endif
#ifdef CONFIG_NET_ICMPv6_NEIGHBOR
/* Used to notify a thread waiting for a particular Neighbor Advertisement */
struct icmpv6_notify_s
{
FAR struct icmpv6_notify_s *nt_flink; /* Supports singly linked list */
net_ipv6addr_t nt_ipaddr; /* Waited for IP address in the mapping */
sem_t nt_sem; /* Will wake up the waiter */
int nt_result; /* The result of the wait */
};
#endif
#ifdef CONFIG_NET_ICMPv6_AUTOCONF
/* Used to notify a thread waiting for a particular Router Advertisement */
struct icmpv6_rnotify_s
{
FAR struct icmpv6_rnotify_s *rn_flink; /* Supports singly linked list */
char rn_ifname[IFNAMSIZ]; /* Device name */
sem_t rn_sem; /* Will wake up the waiter */
int rn_result; /* The result of the wait */
};
#endif
/****************************************************************************
* Public Data
****************************************************************************/
#ifdef __cplusplus
# define EXTERN extern "C"
extern "C"
{
#else
# define EXTERN extern
#endif
#ifdef CONFIG_NET_ICMPv6_SOCKET
/* PF_INET6 socket address family, IPPROTO_ICMP6 protocol interface */
EXTERN const struct sock_intf_s g_icmpv6_sockif;
#endif
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
struct timespec; /* Forward reference */
struct net_driver_s; /* Forward reference */
struct socket; /* Forward reference */
struct sockaddr; /* Forward reference */
struct pollfd; /* Forward reference */
/****************************************************************************
* Name: icmpv6_input
*
* Description:
* Handle incoming ICMPv6 input
*
* Input Parameters:
* dev - The device driver structure containing the received ICMPv6
* packet
* iplen - The size of the IPv6 header. This may be larger than
* IPv6_HDRLEN the IPv6 header if IPv6 extension headers are
* present.
*
* Returned Value:
* None
*
* Assumptions:
* The network is locked.
*
****************************************************************************/
void icmpv6_input(FAR struct net_driver_s *dev, unsigned int iplen);
/****************************************************************************
* Name: icmpv6_neighbor
*
* Description:
* The icmpv6_solicit() call may be to send an ICMPv6 Neighbor
* Solicitation to resolve an IPv6 address. This function first checks if
* the IPv6 address is already in the Neighbor Table. If so, then it
* returns success immediately.
*
* If the requested IPv6 address in not in the Neighbor Table, then this
* function will send the Neighbor Solicitation, delay, then check if the
* IP address is now in the Neighbor able. It will repeat this sequence
* until either (1) the IPv6 address mapping is now in the Neighbor table,
* or (2) a configurable number of timeouts occur without receiving the
* ICMPv6 Neighbor Advertisement.
*
* Input Parameters:
* ipaddr The IPv6 address to be queried.
*
* Returned Value:
* Zero (OK) is returned on success and the IP address mapping can now be
* found in the Neighbor Table. On error a negated errno value is returned:
*
* -ETIMEDOUT: The number or retry counts has been exceed.
* -EHOSTUNREACH: Could not find a route to the host
*
* Assumptions:
* This function is called from the normal tasking context.
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_NEIGHBOR
int icmpv6_neighbor(const net_ipv6addr_t ipaddr);
#else
# define icmpv6_neighbor(i) (0)
#endif
/****************************************************************************
* Name: icmpv6_poll
*
* Description:
* Poll a UDP "connection" structure for availability of ICMPv6 TX data
*
* Input Parameters:
* dev - The device driver structure to use in the send operation
*
* Returned Value:
* None
*
* Assumptions:
* The network is locked.
*
****************************************************************************/
#if defined(CONFIG_NET_ICMPv6_SOCKET) || defined(CONFIG_NET_ICMPv6_NEIGHBOR)
void icmpv6_poll(FAR struct net_driver_s *dev,
FAR struct icmpv6_conn_s *conn);
#endif
/****************************************************************************
* Name: icmpv6_solicit
*
* Description:
* Set up to send an ICMPv6 Neighbor Solicitation message
*
* Input Parameters:
* dev - Reference to a device driver structure
* ipaddr - IP address of Neighbor to be solicited
*
* Returned Value:
* None
*
****************************************************************************/
void icmpv6_solicit(FAR struct net_driver_s *dev,
FAR const net_ipv6addr_t ipaddr);
/****************************************************************************
* Name: icmpv6_rsolicit
*
* Description:
* Set up to send an ICMPv6 Router Solicitation message. This version
* is for a standalone solicitation. If formats:
*
* - The IPv6 header
* - The ICMPv6 Neighbor Router Message
*
* The device IP address should have been set to the link local address
* prior to calling this function.
*
* Input Parameters:
* dev - Reference to a device driver structure
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_AUTOCONF
void icmpv6_rsolicit(FAR struct net_driver_s *dev);
#endif
/****************************************************************************
* Name: icmpv6_advertise
*
* Description:
* Send an ICMPv6 Neighbor Advertisement
*
* Input Parameters:
* dev - The device driver structure containing the outgoing ICMPv6 packet
* buffer
*
* Returned Value:
* None.
*
* Assumptions:
* The network is locked
*
****************************************************************************/
void icmpv6_advertise(FAR struct net_driver_s *dev,
const net_ipv6addr_t destipaddr);
/****************************************************************************
* Name: icmpv6_radvertise
*
* Description:
* Send an ICMPv6 Router Advertisement
*
* Input Parameters:
* dev - The device driver structure containing the outgoing ICMPv6 packet
* buffer
*
* Returned Value:
* None
*
* Assumptions:
* The network is locked
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_ROUTER
void icmpv6_radvertise(FAR struct net_driver_s *dev);
#endif
/****************************************************************************
* Name: icmpv6_wait_setup
*
* Description:
* Called BEFORE an Neighbor Solicitation is sent. This function sets up
* the Neighbor Advertisement timeout before the Neighbor Solicitation
* is sent so that there is no race condition when icmpv6_wait() is called.
*
* Assumptions:
* This function is called from icmpv6_neighbor() and executes in the normal
* tasking environment.
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_NEIGHBOR
void icmpv6_wait_setup(const net_ipv6addr_t ipaddr,
FAR struct icmpv6_notify_s *notify);
#else
# define icmpv6_wait_setup(i,n)
#endif
/****************************************************************************
* Name: icmpv6_wait_cancel
*
* Description:
* Cancel any wait set after icmpv6_wait_setup is called but before
* icmpv6_wait()is called (icmpv6_wait() will automatically cancel the
* wait).
*
* Assumptions:
* This function may execute in the interrupt context when called from
* icmpv6_wait().
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_NEIGHBOR
int icmpv6_wait_cancel(FAR struct icmpv6_notify_s *notify);
#else
# define icmpv6_wait_cancel(n) (0)
#endif
/****************************************************************************
* Name: icmpv6_wait
*
* Description:
* Called each time that a Neighbor Solicitation is sent. This function
* will sleep until either: (1) the matching Neighbor Advertisement is
* received, or (2) a timeout occurs.
*
* Assumptions:
* This function is called from icmpv6_neighbor() and must execute with
* the network un-locked (interrupts may be disabled to keep the things
* stable).
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_NEIGHBOR
int icmpv6_wait(FAR struct icmpv6_notify_s *notify,
FAR struct timespec *timeout);
#else
# define icmpv6_wait(n,t) (0)
#endif
/****************************************************************************
* Name: icmpv6_notify
*
* Description:
* Called each time that a Neighbor Advertisement is received in order to
* wake-up any threads that may be waiting for this particular Neighbor
* Advertisement.
*
* Assumptions:
* This function is called from the MAC device driver indirectly through
* icmpv6_icmpv6in() will execute with the network locked.
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_NEIGHBOR
void icmpv6_notify(net_ipv6addr_t ipaddr);
#else
# define icmpv6_notify(i)
#endif
/****************************************************************************
* Name: icmpv6_autoconfig
*
* Description:
* Perform IPv6 auto-configuration to assign an IPv6 address to this
* device.
*
* Input Parameters:
* dev - The device driver structure to assign the address to
* psock - A pointer to a NuttX-specific, internal socket structure
*
* Returned Value:
* Zero (OK) is returned on success; A negated errno value is returned on
* any failure.
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_AUTOCONF
int icmpv6_autoconfig(FAR struct net_driver_s *dev,
FAR struct socket *psock);
#endif
/****************************************************************************
* Name: icmpv6_rwait_setup
*
* Description:
* Called BEFORE an Router Solicitation is sent. This function sets up
* the Router Advertisement timeout before the Router Solicitation
* is sent so that there is no race condition when icmpv6_rwait() is
* called.
*
* Assumptions:
* This function is called from icmpv6_autoconfig() and executes in the
* normal tasking environment.
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_AUTOCONF
void icmpv6_rwait_setup(FAR struct net_driver_s *dev,
FAR struct icmpv6_rnotify_s *notify);
#else
# define icmpv6_rwait_setup(d,n)
#endif
/****************************************************************************
* Name: icmpv6_rwait_cancel
*
* Description:
* Cancel any wait set after icmpv6_rwait_setup() is called but before
* icmpv6_rwait()is called (icmpv6_rwait() will automatically cancel the
* wait).
*
* Assumptions:
* This function may execute in the interrupt context when called from
* icmpv6_rwait().
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_AUTOCONF
int icmpv6_rwait_cancel(FAR struct icmpv6_rnotify_s *notify);
#else
# define icmpv6_rwait_cancel(n) (0)
#endif
/****************************************************************************
* Name: icmpv6_rwait
*
* Description:
* Called each time that a Router Solicitation is sent. This function
* will sleep until either: (1) the matching Router Advertisement is
* received, or (2) a timeout occurs.
*
* Assumptions:
* This function is called from icmpv6_autoconfig() and must execute with
* the network un-locked (interrupts may be disabled to keep the things
* stable).
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_AUTOCONF
int icmpv6_rwait(FAR struct icmpv6_rnotify_s *notify,
FAR struct timespec *timeout);
#else
# define icmpv6_rwait(n,t) (0)
#endif
/****************************************************************************
* Name: icmpv6_rnotify
*
* Description:
* Called each time that a Router Advertisement is received in order to
* wake-up any threads that may be waiting for this particular Router
* Advertisement.
*
* Assumptions:
* This function is called from the MAC device driver indirectly through
* icmpv6_icmpv6in() will execute with the network locked.
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_AUTOCONF
void icmpv6_rnotify(FAR struct net_driver_s *dev, const net_ipv6addr_t draddr,
const net_ipv6addr_t prefix, unsigned int preflen);
#else
# define icmpv6_rnotify(d,p,l)
#endif
/****************************************************************************
* Name: icmpv6_sock_initialize
*
* Description:
* Initialize the IPPROTO_ICMP socket connection structures. Called once
* and only from the network initialization layer.
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_SOCKET
void icmpv6_sock_initialize(void);
#endif
/****************************************************************************
* Name: icmpv6_alloc
*
* Description:
* Allocate a new, uninitialized IPPROTO_ICMP socket connection structure.
* This is normally something done by the implementation of the socket()
* interface.
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_SOCKET
FAR struct icmpv6_conn_s *icmpv6_alloc(void);
#endif
/****************************************************************************
* Name: icmpv6_free
*
* Description:
* Free a IPPROTO_ICMP socket connection structure that is no longer in
* use. This should be done by the implementation of close().
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_SOCKET
void icmpv6_free(FAR struct icmpv6_conn_s *conn);
#endif
/****************************************************************************
* Name: icmpv6_active()
*
* Description:
* Find a connection structure that is the appropriate connection to be
* used with the provided ECHO request ID.
*
* Assumptions:
* This function is called from network logic at with the network locked.
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_SOCKET
FAR struct icmpv6_conn_s *icmpv6_active(uint16_t id);
#endif
/****************************************************************************
* Name: icmpv6_nextconn
*
* Description:
* Traverse the list of allocated packet connections
*
* Assumptions:
* This function is called from network logic at with the network locked.
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_SOCKET
FAR struct icmpv6_conn_s *icmpv6_nextconn(FAR struct icmpv6_conn_s *conn);
#endif
/****************************************************************************
* Name: icmpv6_findconn
*
* Description:
* Find an ICMPv6 connection structure that is expecting a ICMPv6 ECHO response
* with this ID from this device
*
* Assumptions:
* This function is called from network logic at with the network locked.
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_SOCKET
FAR struct icmpv6_conn_s *icmpv6_findconn(FAR struct net_driver_s *dev,
uint16_t id);
#endif
/****************************************************************************
* Name: icmpv6_sendto
*
* Description:
* Implements the sendto() operation for the case of the IPPROTO_ICMP6
* socket. The 'buf' parameter points to a block of memory that includes
* an ICMPv6 request header, followed by any payload that accompanies the
* request. The 'len' parameter includes both the size of the ICMPv6
* header and the following payload.
*
* 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.
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_SOCKET
ssize_t icmpv6_sendto(FAR struct socket *psock, FAR const void *buf, size_t len,
int flags, FAR const struct sockaddr *to, socklen_t tolen);
#endif
/****************************************************************************
* Name: icmpv6_recvfrom
*
* Description:
* Implements the socket recvfrom interface for the case of the AF_INET6
* data gram socket with the IPPROTO_ICMP6 protocol. icmpv6_recvfrom()
* receives ICMPv6 ECHO replies for the a socket.
*
* 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).
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_SOCKET
ssize_t icmpv6_recvfrom(FAR struct socket *psock, FAR void *buf, size_t len,
int flags, FAR struct sockaddr *from,
FAR socklen_t *fromlen);
#endif
/****************************************************************************
* Name: icmpv6_pollsetup
*
* Description:
* Setup to monitor events on one ICMPv6 socket
*
* Input Parameters:
* psock - The IPPROTO_ICMP6 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
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_SOCKET
int icmpv6_pollsetup(FAR struct socket *psock, FAR struct pollfd *fds);
#endif
/****************************************************************************
* Name: icmpv6_pollteardown
*
* Description:
* Teardown monitoring of events on an ICMPv6 socket
*
* Input Parameters:
* psock - The IPPROTO_ICMP6 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
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6_SOCKET
int icmpv6_pollteardown(FAR struct socket *psock, FAR struct pollfd *fds);
#endif
/****************************************************************************
* Name: icmpv6_linkipaddr
*
* Description:
* Generate the device link scope ipv6 address as below:
* 128 112 96 80 64 48 32 16
* ---- ---- ---- ---- ---- ---- ---- ----
* fe80 0000 0000 0000 0000 00ff fe00 xx00 1-byte short address IEEE 48-bit MAC
* fe80 0000 0000 0000 0000 00ff fe00 xxxx 2-byte short address IEEE 48-bit MAC
* fe80 0000 0000 0000 xxxx xxff fexx xxxx 6-byte normal address IEEE 48-bit MAC
* fe80 0000 0000 0000 xxxx xxxx xxxx xxxx 8-byte extended address IEEE EUI-64
*
* Input Parameters:
* dev - The device driver structure containing the link layer address
* ipaddr - Receive the device link scope ipv6 address
*
* Returned Value:
* None
*
****************************************************************************/
void icmpv6_linkipaddr(FAR struct net_driver_s *dev, net_ipv6addr_t ipaddr);
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* CONFIG_NET_ICMPv6 && !CONFIG_NET_ICMPv6_NO_STACK */
#endif /* __NET_ICMPv6_ICMPv6_H */