/**************************************************************************** * net/icmpv6/icmpv6.h * * Copyright (C) 2015, 2017-2019 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * 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 #include #include #include #include #include #include #include #include #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 ****************************************************************************/ struct net_driver_s; /* Forward reference */ struct socket; /* Forward reference */ struct sockaddr; /* Forward reference */ struct pollfd; /* Forward reference */ #ifdef CONFIG_NET_ICMPv6_SOCKET /* Representation of a IPPROTO_ICMP socket connection */ struct devif_callback_s; /* Forward reference */ /* This is a container that holds the poll-related information */ struct icmpv6_poll_s { FAR struct socket *psock; /* IPPROTO_ICMP6 socket structure */ FAR struct pollfd *fds; /* Needed to handle poll events */ FAR struct devif_callback_s *cb; /* Needed to teardown the poll */ }; 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 */ /* 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 */ /* The following is a list of poll structures of threads waiting for * socket events. */ struct icmpv6_poll_s pollinfo[CONFIG_NET_ICMPv6_NPOLLWAITERS]; }; #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 ****************************************************************************/ /**************************************************************************** * 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, unsigned int 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 * * 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); #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, unsigned int 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 */