/**************************************************************************** * net/devif/devif.h * * Copyright (C) 2007-2009, 2013-2014 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * This logic was leveraged from uIP which also has a BSD-style license: * * Author Adam Dunkels * Copyright (c) 2001-2003, Adam Dunkels. * All rights reserved. * * 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. The name of the author may not be used to endorse or promote * products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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_DEVIF_DEVIF_H #define _NET_DEVIF_DEVIF_H /**************************************************************************** * Included Files ****************************************************************************/ #include #ifdef CONFIG_NET #include #include #include #include #include /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* The following flags may be set in the set of flags by the lower, device- * interfacing layer before calling through the socket layer callback. The * TCP_ACKDATA, XYZ_NEWDATA, and TCP_CLOSE flags may be set at the same time, * whereas the others are mutually exclusive. * * TCP_ACKDATA IN: Signifies that the outstanding data was ACKed and * the socket layer should send out new data instead * of retransmitting the last data (TCP only) * OUT: Input state must be preserved on output. * * TCP_NEWDATA IN: Set to indicate that the peer has sent us new data. * UDP_NEWDATA OUT: Cleared (only) by the socket layer logic to indicate * PKT_NEWDATA that the new data was consumed, suppressing further * ICMP_NEWDATA attempts to process the new data. * * TCP_SNDACK IN: Not used; always zero * OUT: Set by the socket layer if the new data was consumed * and an ACK should be sent in the response. (TCP only) * * TCP_REXMIT IN: Tells the socket layer to retransmit the data that * was last sent. (TCP only) * OUT: Not used * * TCP_POLL IN: Used for polling the socket layer. This is provided * UDP_POLL periodically from the drivers to support (1) timed * PKT_POLL operations, and (2) to check if the socket layer has * ICMP_POLL data that it wants to send * OUT: Not used * * TCP_BACKLOG IN: There is a new connection in the backlog list set * up by the listen() command. (TCP only) * OUT: Not used * * TCP_CLOSE IN: The remote host has closed the connection, thus the * connection has gone away. (TCP only) * OUT: The socket layer signals that it wants to close the * connection. (TCP only) * * TCP_ABORT IN: The remote host has aborted the connection, thus the * connection has gone away. (TCP only) * OUT: The socket layer signals that it wants to abort the * connection. (TCP only) * * TCP_CONNECTED IN: We have got a connection from a remote host and have * set up a new connection for it, or an active connection * has been successfully established. (TCP only) * OUT: Not used * * TCP_TIMEDOUT IN: The connection has been aborted due to too many * retransmissions. (TCP only) * OUT: Not used * * ICMP_ECHOREPLY IN: An ICMP Echo Reply has been received. Used to support * ICMP ping from the socket layer. (ICMP only) * OUT: Cleared (only) by the socket layer logic to indicate * that the reply was processed, suppressing further * attempts to process the reply. */ #define TCP_ACKDATA (1 << 0) #define TCP_NEWDATA (1 << 1) #define UDP_NEWDATA TCP_NEWDATA #define PKT_NEWDATA TCP_NEWDATA #define ICMP_NEWDATA TCP_NEWDATA #define TCP_SNDACK (1 << 2) #define TCP_REXMIT (1 << 3) #define TCP_POLL (1 << 4) #define UDP_POLL TCP_POLL #define PKT_POLL TCP_POLL #define ICMP_POLL TCP_POLL #define TCP_BACKLOG (1 << 5) #define TCP_CLOSE (1 << 6) #define TCP_ABORT (1 << 7) #define TCP_CONNECTED (1 << 8) #define TCP_TIMEDOUT (1 << 9) #define ICMP_ECHOREPLY (1 << 10) #define TCP_CONN_EVENTS (TCP_CLOSE | TCP_ABORT | TCP_CONNECTED | TCP_TIMEDOUT) /**************************************************************************** * Public Type Definitions ****************************************************************************/ /* Describes a device interface callback * * flink - Supports a singly linked list * event - Provides the address of the callback function entry point. * pvconn is a pointer to one of struct tcp_conn_s or struct * udp_conn_s. * priv - Holds a reference to socket layer specific data that will * provided * flags - Set by the socket layer to inform the lower layer which flags * were and were not handled by the callback. */ struct net_driver_s; /* Forward reference */ struct devif_callback_s { FAR struct devif_callback_s *flink; uint16_t (*event)(FAR struct net_driver_s *dev, FAR void *pvconn, FAR void *pvpriv, uint16_t flags); FAR void *priv; uint16_t flags; }; /**************************************************************************** * Public Data ****************************************************************************/ extern const net_ipaddr_t g_alloneaddr; extern const net_ipaddr_t g_allzeroaddr; /* Increasing number used for the IP ID field. */ extern uint16_t g_ipid; /* Reassembly timer (units: deci-seconds) */ #if defined(CONFIG_NET_TCP_REASSEMBLY) && !defined(CONFIG_NET_IPv6) extern uint8_t g_reassembly_timer; #endif /* List of applications waiting for ICMP ECHO REPLY */ #if defined(CONFIG_NET_ICMP) && defined(CONFIG_NET_ICMP_PING) extern struct devif_callback_s *g_echocallback; #endif /**************************************************************************** * Public Function Prototypes ****************************************************************************/ #ifdef __cplusplus #define EXTERN extern "C" extern "C" { #else #define EXTERN extern #endif /**************************************************************************** * Name: devif_initialize * * Description: * Perform initialization of the network device interface layer * * Parameters: * None * * Return: * None * ****************************************************************************/ void devif_initialize(void); /**************************************************************************** * Function: devif_callback_init * * Description: * Configure the pre-allocated callback structures into a free list. * This is called internally as part of uIP initialization and should not * be accessed from the application or socket layer. * * Assumptions: * This function is called with interrupts disabled. * ****************************************************************************/ void devif_callback_init(void); /**************************************************************************** * Function: devif_callback_alloc * * Description: * Allocate a callback container from the free list. * This is called internally as part of uIP initialization and should not * be accessed from the application or socket layer. * * Assumptions: * This function is called with interrupts disabled. * ****************************************************************************/ FAR struct devif_callback_s *devif_callback_alloc(FAR struct devif_callback_s **list); /**************************************************************************** * Function: devif_callback_free * * Description: * Return a callback container to the free list. * This is called internally as part of uIP initialization and should not * be accessed from the application or socket layer. * * Assumptions: * This function is called with interrupts disabled. * ****************************************************************************/ void devif_callback_free(FAR struct devif_callback_s *cb, FAR struct devif_callback_s **list); /**************************************************************************** * Function: devif_callback_execute * * Description: * Execute a list of callbacks. * This is called internally as part of uIP initialization and should not * be accessed from the application or socket layer. * * Assumptions: * This function is called with interrupts disabled. * ****************************************************************************/ uint16_t devif_callback_execute(FAR struct net_driver_s *dev, FAR void *pvconn, uint16_t flags, FAR struct devif_callback_s *list); /**************************************************************************** * Send data on the current connection. * * This function is used to send out a single segment of TCP data. Only * socket logic that have been invoked by the lower level for event * processing can send data. * * The amount of data that actually is sent out after a call to this * function is determined by the maximum amount of data TCP allows. uIP * will automatically crop the data so that only the appropriate * amount of data is sent. The function tcp_mss() can be used to query * uIP for the amount of data that actually will be sent. * * Note: This function does not guarantee that the sent data will * arrive at the destination. If the data is lost in the network, the * TCP socket layer will be invoked with the TCP_REXMIT flag set. The * socket layer will then have to resend the data using this function. * * data A pointer to the data which is to be sent. * * len The maximum amount of data bytes to be sent. * ****************************************************************************/ void devif_send(FAR struct net_driver_s *dev, FAR const void *buf, int len); #ifdef CONFIG_NET_IOB struct iob_s; void devif_iob_send(FAR struct net_driver_s *dev, FAR struct iob_s *buf, unsigned int len, unsigned int offset); #endif #ifdef CONFIG_NET_PKT void devif_pkt_send(FAR struct net_driver_s *dev, FAR const void *buf, unsigned int len); #endif #undef EXTERN #ifdef __cplusplus } #endif #endif /* CONFIG_NET */ #endif /* _NET_DEVIF_DEVIF_H */