/**
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* @file
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* netif API (to be used from TCPIP thread)
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*/
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/*
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* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Adam Dunkels <adam@sics.se>
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*
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*/
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#ifndef LWIP_HDR_NETIF_H
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#define LWIP_HDR_NETIF_H
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#include "lwip/opt.h"
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#define ENABLE_LOOPBACK (LWIP_NETIF_LOOPBACK || LWIP_HAVE_LOOPIF)
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#include "lwip/err.h"
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#include "lwip/ip_addr.h"
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#include "lwip/def.h"
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#include "lwip/pbuf.h"
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#include "lwip/stats.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Throughout this file, IP addresses are expected to be in
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* the same byte order as in IP_PCB. */
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/** Must be the maximum of all used hardware address lengths
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across all types of interfaces in use.
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This does not have to be changed, normally. */
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#ifndef NETIF_MAX_HWADDR_LEN
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#define NETIF_MAX_HWADDR_LEN 6U
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#endif
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/**
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* @defgroup netif_flags Flags
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* @ingroup netif
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* @{
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*/
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/** Whether the network interface is 'up'. This is
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* a software flag used to control whether this network
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* interface is enabled and processes traffic.
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* It must be set by the startup code before this netif can be used
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* (also for dhcp/autoip).
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*/
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#define NETIF_FLAG_UP 0x01U
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/** If set, the netif has broadcast capability.
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* Set by the netif driver in its init function. */
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#define NETIF_FLAG_BROADCAST 0x02U
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/** If set, the interface has an active link
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* (set by the network interface driver).
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* Either set by the netif driver in its init function (if the link
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* is up at that time) or at a later point once the link comes up
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* (if link detection is supported by the hardware). */
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#define NETIF_FLAG_LINK_UP 0x04U
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/** If set, the netif is an ethernet device using ARP.
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* Set by the netif driver in its init function.
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* Used to check input packet types and use of DHCP. */
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#define NETIF_FLAG_ETHARP 0x08U
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/** If set, the netif is an ethernet device. It might not use
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* ARP or TCP/IP if it is used for PPPoE only.
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*/
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#define NETIF_FLAG_ETHERNET 0x10U
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/** If set, the netif has IGMP capability.
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* Set by the netif driver in its init function. */
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#define NETIF_FLAG_IGMP 0x20U
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/** If set, the netif has MLD6 capability.
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* Set by the netif driver in its init function. */
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#define NETIF_FLAG_MLD6 0x40U
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#if ESP_GRATUITOUS_ARP
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/** If set, the netif will send gratuitous ARP periodically */
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#define NETIF_FLAG_GARP 0x80U
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#endif
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/**
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* @}
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*/
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enum lwip_internal_netif_client_data_index
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{
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#if LWIP_DHCP
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LWIP_NETIF_CLIENT_DATA_INDEX_DHCP,
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#endif
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#if LWIP_AUTOIP
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LWIP_NETIF_CLIENT_DATA_INDEX_AUTOIP,
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#endif
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#if LWIP_IGMP
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LWIP_NETIF_CLIENT_DATA_INDEX_IGMP,
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#endif
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#if LWIP_IPV6_MLD
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LWIP_NETIF_CLIENT_DATA_INDEX_MLD6,
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#endif
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LWIP_NETIF_CLIENT_DATA_INDEX_MAX
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};
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#if LWIP_CHECKSUM_CTRL_PER_NETIF
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#define NETIF_CHECKSUM_GEN_IP 0x0001
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#define NETIF_CHECKSUM_GEN_UDP 0x0002
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#define NETIF_CHECKSUM_GEN_TCP 0x0004
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#define NETIF_CHECKSUM_GEN_ICMP 0x0008
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#define NETIF_CHECKSUM_GEN_ICMP6 0x0010
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#define NETIF_CHECKSUM_CHECK_IP 0x0100
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#define NETIF_CHECKSUM_CHECK_UDP 0x0200
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#define NETIF_CHECKSUM_CHECK_TCP 0x0400
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#define NETIF_CHECKSUM_CHECK_ICMP 0x0800
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#define NETIF_CHECKSUM_CHECK_ICMP6 0x1000
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#define NETIF_CHECKSUM_ENABLE_ALL 0xFFFF
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#define NETIF_CHECKSUM_DISABLE_ALL 0x0000
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#endif /* LWIP_CHECKSUM_CTRL_PER_NETIF */
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struct netif;
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/** MAC Filter Actions, these are passed to a netif's igmp_mac_filter or
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* mld_mac_filter callback function. */
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enum netif_mac_filter_action {
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/** Delete a filter entry */
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NETIF_DEL_MAC_FILTER = 0,
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/** Add a filter entry */
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NETIF_ADD_MAC_FILTER = 1
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};
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/** Function prototype for netif init functions. Set up flags and output/linkoutput
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* callback functions in this function.
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*
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* @param netif The netif to initialize
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*/
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typedef err_t (*netif_init_fn)(struct netif *netif);
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/** Function prototype for netif->input functions. This function is saved as 'input'
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* callback function in the netif struct. Call it when a packet has been received.
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*
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* @param p The received packet, copied into a pbuf
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* @param inp The netif which received the packet
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*/
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typedef err_t (*netif_input_fn)(struct pbuf *p, struct netif *inp);
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#if LWIP_IPV4
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/** Function prototype for netif->output functions. Called by lwIP when a packet
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* shall be sent. For ethernet netif, set this to 'etharp_output' and set
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* 'linkoutput'.
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*
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* @param netif The netif which shall send a packet
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* @param p The packet to send (p->payload points to IP header)
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* @param ipaddr The IP address to which the packet shall be sent
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*/
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typedef err_t (*netif_output_fn)(struct netif *netif, struct pbuf *p,
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const ip4_addr_t *ipaddr);
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#endif /* LWIP_IPV4*/
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#if LWIP_IPV6
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/** Function prototype for netif->output_ip6 functions. Called by lwIP when a packet
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* shall be sent. For ethernet netif, set this to 'ethip6_output' and set
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* 'linkoutput'.
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*
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* @param netif The netif which shall send a packet
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* @param p The packet to send (p->payload points to IP header)
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* @param ipaddr The IPv6 address to which the packet shall be sent
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*/
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typedef err_t (*netif_output_ip6_fn)(struct netif *netif, struct pbuf *p,
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const ip6_addr_t *ipaddr);
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#endif /* LWIP_IPV6 */
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/** Function prototype for netif->linkoutput functions. Only used for ethernet
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* netifs. This function is called by ARP when a packet shall be sent.
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*
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* @param netif The netif which shall send a packet
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* @param p The packet to send (raw ethernet packet)
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*/
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typedef err_t (*netif_linkoutput_fn)(struct netif *netif, struct pbuf *p);
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/** Function prototype for netif status- or link-callback functions. */
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typedef void (*netif_status_callback_fn)(struct netif *netif);
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#if LWIP_IPV4 && LWIP_IGMP
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/** Function prototype for netif igmp_mac_filter functions */
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typedef err_t (*netif_igmp_mac_filter_fn)(struct netif *netif,
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const ip4_addr_t *group, enum netif_mac_filter_action action);
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#endif /* LWIP_IPV4 && LWIP_IGMP */
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#if LWIP_IPV6 && LWIP_IPV6_MLD
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/** Function prototype for netif mld_mac_filter functions */
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typedef err_t (*netif_mld_mac_filter_fn)(struct netif *netif,
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const ip6_addr_t *group, enum netif_mac_filter_action action);
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#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */
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#if LWIP_DHCP || LWIP_AUTOIP || LWIP_IGMP || LWIP_IPV6_MLD || (LWIP_NUM_NETIF_CLIENT_DATA > 0)
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u8_t netif_alloc_client_data_id(void);
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/** @ingroup netif_cd
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* Set client data. Obtain ID from netif_alloc_client_data_id().
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*/
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#define netif_set_client_data(netif, id, data) netif_get_client_data(netif, id) = (data)
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/** @ingroup netif_cd
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* Get client data. Obtain ID from netif_alloc_client_data_id().
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*/
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#define netif_get_client_data(netif, id) (netif)->client_data[(id)]
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#endif /* LWIP_DHCP || LWIP_AUTOIP || (LWIP_NUM_NETIF_CLIENT_DATA > 0) */
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#if ESP_DHCP
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/*add DHCP event processing by LiuHan*/
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typedef void (*dhcp_event_fn)(void);
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#endif
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/** Generic data structure used for all lwIP network interfaces.
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* The following fields should be filled in by the initialization
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* function for the device driver: hwaddr_len, hwaddr[], mtu, flags */
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struct netif {
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/** pointer to next in linked list */
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struct netif *next;
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#if LWIP_IPV4
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/** IP address configuration in network byte order */
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ip_addr_t ip_addr;
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ip_addr_t netmask;
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ip_addr_t gw;
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#endif /* LWIP_IPV4 */
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#if LWIP_IPV6
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/** Array of IPv6 addresses for this netif. */
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ip_addr_t ip6_addr[LWIP_IPV6_NUM_ADDRESSES];
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/** The state of each IPv6 address (Tentative, Preferred, etc).
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* @see ip6_addr.h */
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u8_t ip6_addr_state[LWIP_IPV6_NUM_ADDRESSES];
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#if ESP_LWIP
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void (*ipv6_addr_cb)(struct netif* netif, u8_t ip_idex); /* callback for ipv6 addr states changed */
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#endif
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#endif /* LWIP_IPV6 */
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/** This function is called by the network device driver
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* to pass a packet up the TCP/IP stack. */
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netif_input_fn input;
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#if LWIP_IPV4
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/** This function is called by the IP module when it wants
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* to send a packet on the interface. This function typically
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* first resolves the hardware address, then sends the packet.
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* For ethernet physical layer, this is usually etharp_output() */
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netif_output_fn output;
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#endif /* LWIP_IPV4 */
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/** This function is called by ethernet_output() when it wants
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* to send a packet on the interface. This function outputs
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* the pbuf as-is on the link medium. */
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netif_linkoutput_fn linkoutput;
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#if LWIP_IPV6
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/** This function is called by the IPv6 module when it wants
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* to send a packet on the interface. This function typically
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* first resolves the hardware address, then sends the packet.
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* For ethernet physical layer, this is usually ethip6_output() */
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netif_output_ip6_fn output_ip6;
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#endif /* LWIP_IPV6 */
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#if LWIP_NETIF_STATUS_CALLBACK
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/** This function is called when the netif state is set to up or down
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*/
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netif_status_callback_fn status_callback;
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#endif /* LWIP_NETIF_STATUS_CALLBACK */
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#if LWIP_NETIF_LINK_CALLBACK
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/** This function is called when the netif link is set to up or down
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*/
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netif_status_callback_fn link_callback;
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#endif /* LWIP_NETIF_LINK_CALLBACK */
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#if LWIP_NETIF_REMOVE_CALLBACK
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/** This function is called when the netif has been removed */
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netif_status_callback_fn remove_callback;
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#endif /* LWIP_NETIF_REMOVE_CALLBACK */
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/** This field can be set by the device driver and could point
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* to state information for the device. */
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void *state;
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#ifdef netif_get_client_data
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void* client_data[LWIP_NETIF_CLIENT_DATA_INDEX_MAX + LWIP_NUM_NETIF_CLIENT_DATA];
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#endif
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#if ESP_DHCP
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struct udp_pcb *dhcps_pcb;
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dhcp_event_fn dhcp_event;
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#endif
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#if LWIP_IPV6_AUTOCONFIG
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/** is this netif enabled for IPv6 autoconfiguration */
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u8_t ip6_autoconfig_enabled;
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#endif /* LWIP_IPV6_AUTOCONFIG */
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#if LWIP_IPV6_SEND_ROUTER_SOLICIT
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/** Number of Router Solicitation messages that remain to be sent. */
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u8_t rs_count;
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#endif /* LWIP_IPV6_SEND_ROUTER_SOLICIT */
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#if LWIP_NETIF_HOSTNAME
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/* the hostname for this netif, NULL is a valid value */
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const char* hostname;
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#endif /* LWIP_NETIF_HOSTNAME */
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#if LWIP_CHECKSUM_CTRL_PER_NETIF
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u16_t chksum_flags;
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#endif /* LWIP_CHECKSUM_CTRL_PER_NETIF*/
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/** maximum transfer unit (in bytes) */
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u16_t mtu;
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/** number of bytes used in hwaddr */
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u8_t hwaddr_len;
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/** link level hardware address of this interface */
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u8_t hwaddr[NETIF_MAX_HWADDR_LEN];
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/** flags (@see @ref netif_flags) */
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u8_t flags;
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/** descriptive abbreviation */
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char name[2];
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/** number of this interface */
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u8_t num;
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#if MIB2_STATS
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/** link type (from "snmp_ifType" enum from snmp_mib2.h) */
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u8_t link_type;
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/** (estimate) link speed */
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u32_t link_speed;
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/** timestamp at last change made (up/down) */
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u32_t ts;
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/** counters */
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struct stats_mib2_netif_ctrs mib2_counters;
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#endif /* MIB2_STATS */
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#if LWIP_IPV4 && LWIP_IGMP
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/** This function could be called to add or delete an entry in the multicast
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filter table of the ethernet MAC.*/
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netif_igmp_mac_filter_fn igmp_mac_filter;
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#endif /* LWIP_IPV4 && LWIP_IGMP */
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#if LWIP_IPV6 && LWIP_IPV6_MLD
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/** This function could be called to add or delete an entry in the IPv6 multicast
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filter table of the ethernet MAC. */
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netif_mld_mac_filter_fn mld_mac_filter;
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#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */
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#if LWIP_NETIF_HWADDRHINT
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u8_t *addr_hint;
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#endif /* LWIP_NETIF_HWADDRHINT */
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#if ENABLE_LOOPBACK
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/* List of packets to be queued for ourselves. */
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struct pbuf *loop_first;
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struct pbuf *loop_last;
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#if LWIP_LOOPBACK_MAX_PBUFS
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u16_t loop_cnt_current;
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#endif /* LWIP_LOOPBACK_MAX_PBUFS */
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#endif /* ENABLE_LOOPBACK */
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#if ESP_LWIP
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void (*l2_buffer_free_notify)(void *user_buf); /* Allows LWIP to notify driver when a L2-supplied pbuf can be freed */
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ip_addr_t last_ip_addr; /* Store last non-zero ip address */
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#endif
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};
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#if LWIP_CHECKSUM_CTRL_PER_NETIF
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#define NETIF_SET_CHECKSUM_CTRL(netif, chksumflags) do { \
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(netif)->chksum_flags = chksumflags; } while(0)
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#define IF__NETIF_CHECKSUM_ENABLED(netif, chksumflag) if (((netif) == NULL) || (((netif)->chksum_flags & (chksumflag)) != 0))
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#else /* LWIP_CHECKSUM_CTRL_PER_NETIF */
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#define NETIF_SET_CHECKSUM_CTRL(netif, chksumflags)
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#define IF__NETIF_CHECKSUM_ENABLED(netif, chksumflag)
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#endif /* LWIP_CHECKSUM_CTRL_PER_NETIF */
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/** The list of network interfaces. */
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extern struct netif *netif_list;
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/** The default network interface. */
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extern struct netif *netif_default;
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void netif_init(void);
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struct netif *netif_add(struct netif *netif,
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#if LWIP_IPV4
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const ip4_addr_t *ipaddr, const ip4_addr_t *netmask, const ip4_addr_t *gw,
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#endif /* LWIP_IPV4 */
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void *state, netif_init_fn init, netif_input_fn input);
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#if LWIP_IPV4
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void netif_set_addr(struct netif *netif, const ip4_addr_t *ipaddr, const ip4_addr_t *netmask,
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const ip4_addr_t *gw);
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#endif /* LWIP_IPV4 */
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#if ESP_GRATUITOUS_ARP
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void netif_set_garp_flag(struct netif *netif);
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#endif
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void netif_remove(struct netif * netif);
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/* Returns a network interface given its name. The name is of the form
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"et0", where the first two letters are the "name" field in the
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netif structure, and the digit is in the num field in the same
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structure. */
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struct netif *netif_find(const char *name);
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void netif_set_default(struct netif *netif);
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#if LWIP_IPV4
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void netif_set_ipaddr(struct netif *netif, const ip4_addr_t *ipaddr);
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void netif_set_netmask(struct netif *netif, const ip4_addr_t *netmask);
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void netif_set_gw(struct netif *netif, const ip4_addr_t *gw);
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/** @ingroup netif_ip4 */
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#define netif_ip4_addr(netif) ((const ip4_addr_t*)ip_2_ip4(&((netif)->ip_addr)))
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/** @ingroup netif_ip4 */
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#define netif_ip4_netmask(netif) ((const ip4_addr_t*)ip_2_ip4(&((netif)->netmask)))
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/** @ingroup netif_ip4 */
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#define netif_ip4_gw(netif) ((const ip4_addr_t*)ip_2_ip4(&((netif)->gw)))
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/** @ingroup netif_ip4 */
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#define netif_ip_addr4(netif) ((const ip_addr_t*)&((netif)->ip_addr))
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/** @ingroup netif_ip4 */
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#define netif_ip_netmask4(netif) ((const ip_addr_t*)&((netif)->netmask))
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/** @ingroup netif_ip4 */
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#define netif_ip_gw4(netif) ((const ip_addr_t*)&((netif)->gw))
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#endif /* LWIP_IPV4 */
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void netif_set_up(struct netif *netif);
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void netif_set_down(struct netif *netif);
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/** @ingroup netif
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* Ask if an interface is up
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*/
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#if ESP_LWIP
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#define netif_is_up(netif) ( ((netif) && ((netif)->flags & NETIF_FLAG_UP)) ? (u8_t)1 : (u8_t)0)
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#else
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#define netif_is_up(netif) (((netif)->flags & NETIF_FLAG_UP) ? (u8_t)1 : (u8_t)0)
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#endif
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#if LWIP_NETIF_STATUS_CALLBACK
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void netif_set_status_callback(struct netif *netif, netif_status_callback_fn status_callback);
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#endif /* LWIP_NETIF_STATUS_CALLBACK */
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#if LWIP_NETIF_REMOVE_CALLBACK
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void netif_set_remove_callback(struct netif *netif, netif_status_callback_fn remove_callback);
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#endif /* LWIP_NETIF_REMOVE_CALLBACK */
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void netif_set_link_up(struct netif *netif);
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void netif_set_link_down(struct netif *netif);
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/** Ask if a link is up */
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#define netif_is_link_up(netif) (((netif)->flags & NETIF_FLAG_LINK_UP) ? (u8_t)1 : (u8_t)0)
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#if LWIP_NETIF_LINK_CALLBACK
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void netif_set_link_callback(struct netif *netif, netif_status_callback_fn link_callback);
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#endif /* LWIP_NETIF_LINK_CALLBACK */
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#if LWIP_NETIF_HOSTNAME
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/** @ingroup netif */
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#define netif_set_hostname(netif, name) do { if((netif) != NULL) { (netif)->hostname = name; }}while(0)
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/** @ingroup netif */
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#define netif_get_hostname(netif) (((netif) != NULL) ? ((netif)->hostname) : NULL)
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#endif /* LWIP_NETIF_HOSTNAME */
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#if LWIP_IGMP
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/** @ingroup netif */
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#define netif_set_igmp_mac_filter(netif, function) do { if((netif) != NULL) { (netif)->igmp_mac_filter = function; }}while(0)
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#define netif_get_igmp_mac_filter(netif) (((netif) != NULL) ? ((netif)->igmp_mac_filter) : NULL)
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#endif /* LWIP_IGMP */
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#if LWIP_IPV6 && LWIP_IPV6_MLD
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/** @ingroup netif */
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#define netif_set_mld_mac_filter(netif, function) do { if((netif) != NULL) { (netif)->mld_mac_filter = function; }}while(0)
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#define netif_get_mld_mac_filter(netif) (((netif) != NULL) ? ((netif)->mld_mac_filter) : NULL)
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#define netif_mld_mac_filter(netif, addr, action) do { if((netif) && (netif)->mld_mac_filter) { (netif)->mld_mac_filter((netif), (addr), (action)); }}while(0)
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#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */
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#if ENABLE_LOOPBACK
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err_t netif_loop_output(struct netif *netif, struct pbuf *p);
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void netif_poll(struct netif *netif);
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#if !LWIP_NETIF_LOOPBACK_MULTITHREADING
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void netif_poll_all(void);
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#endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
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#endif /* ENABLE_LOOPBACK */
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err_t netif_input(struct pbuf *p, struct netif *inp);
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#if LWIP_IPV6
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/** @ingroup netif_ip6 */
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#define netif_ip_addr6(netif, i) ((const ip_addr_t*)(&((netif)->ip6_addr[i])))
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/** @ingroup netif_ip6 */
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#define netif_ip6_addr(netif, i) ((const ip6_addr_t*)ip_2_ip6(&((netif)->ip6_addr[i])))
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void netif_ip6_addr_set(struct netif *netif, s8_t addr_idx, const ip6_addr_t *addr6);
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void netif_ip6_addr_set_parts(struct netif *netif, s8_t addr_idx, u32_t i0, u32_t i1, u32_t i2, u32_t i3);
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#define netif_ip6_addr_state(netif, i) ((netif)->ip6_addr_state[i])
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void netif_ip6_addr_set_state(struct netif* netif, s8_t addr_idx, u8_t state);
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s8_t netif_get_ip6_addr_match(struct netif *netif, const ip6_addr_t *ip6addr);
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void netif_create_ip6_linklocal_address(struct netif *netif, u8_t from_mac_48bit);
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err_t netif_add_ip6_address(struct netif *netif, const ip6_addr_t *ip6addr, s8_t *chosen_idx);
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#define netif_set_ip6_autoconfig_enabled(netif, action) do { if(netif) { (netif)->ip6_autoconfig_enabled = (action); }}while(0)
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#endif /* LWIP_IPV6 */
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#if LWIP_NETIF_HWADDRHINT
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#define NETIF_SET_HWADDRHINT(netif, hint) ((netif)->addr_hint = (hint))
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#else /* LWIP_NETIF_HWADDRHINT */
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#define NETIF_SET_HWADDRHINT(netif, hint)
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#endif /* LWIP_NETIF_HWADDRHINT */
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#ifdef __cplusplus
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}
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#endif
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#endif /* LWIP_HDR_NETIF_H */
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