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/*
* Copyright ( c ) 2001 - 2004 Swedish Institute of Computer Science .
* 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 .
*
* This file is part of the lwIP TCP / IP stack .
*
* Author : Adam Dunkels < adam @ sics . se >
*
*/
# ifndef __LWIP_NETIF_H__
# define __LWIP_NETIF_H__
# include "lwip/opt.h"
# define ENABLE_LOOPBACK (LWIP_NETIF_LOOPBACK || LWIP_HAVE_LOOPIF)
# include "lwip/err.h"
# include "lwip/ip_addr.h"
# include "lwip/def.h"
# include "lwip/pbuf.h"
# if LWIP_DHCP
struct dhcp ;
# endif
# if LWIP_AUTOIP
struct autoip ;
# endif
# ifdef __cplusplus
extern " C " {
# endif
/* Throughout this file, IP addresses are expected to be in
* the same byte order as in IP_PCB . */
/** must be the maximum of all used hardware address lengths
across all types of interfaces in use */
# define NETIF_MAX_HWADDR_LEN 6U
/** Whether the network interface is 'up'. This is
* a software flag used to control whether this network
* interface is enabled and processes traffic .
* It is set by the startup code ( for static IP configuration ) or
* by dhcp / autoip when an address has been assigned .
*/
# define NETIF_FLAG_UP 0x01U
/** If set, the netif has broadcast capability.
* Set by the netif driver in its init function . */
# define NETIF_FLAG_BROADCAST 0x02U
/** If set, the netif is one end of a point-to-point connection.
* Set by the netif driver in its init function . */
# define NETIF_FLAG_POINTTOPOINT 0x04U
/** If set, the interface is configured using DHCP.
* Set by the DHCP code when starting or stopping DHCP . */
# define NETIF_FLAG_DHCP 0x08U
/** If set, the interface has an active link
* ( set by the network interface driver ) .
* Either set by the netif driver in its init function ( if the link
* is up at that time ) or at a later point once the link comes up
* ( if link detection is supported by the hardware ) . */
# define NETIF_FLAG_LINK_UP 0x10U
/** If set, the netif is an ethernet device using ARP.
* Set by the netif driver in its init function .
* Used to check input packet types and use of DHCP . */
# define NETIF_FLAG_ETHARP 0x20U
/** If set, the netif is an ethernet device. It might not use
* ARP or TCP / IP if it is used for PPPoE only .
*/
# define NETIF_FLAG_ETHERNET 0x40U
/** If set, the netif has IGMP capability.
* Set by the netif driver in its init function . */
# define NETIF_FLAG_IGMP 0x80U
/** Function prototype for netif init functions. Set up flags and output/linkoutput
* callback functions in this function .
*
* @ param netif The netif to initialize
*/
typedef err_t ( * netif_init_fn ) ( struct netif * netif ) ;
/** Function prototype for netif->input functions. This function is saved as 'input'
* callback function in the netif struct . Call it when a packet has been received .
*
* @ param p The received packet , copied into a pbuf
* @ param inp The netif which received the packet
*/
typedef err_t ( * netif_input_fn ) ( struct pbuf * p , struct netif * inp ) ;
/** Function prototype for netif->output functions. Called by lwIP when a packet
* shall be sent . For ethernet netif , set this to ' etharp_output ' and set
* ' linkoutput ' .
*
* @ param netif The netif which shall send a packet
* @ param p The packet to send ( p - > payload points to IP header )
* @ param ipaddr The IP address to which the packet shall be sent
*/
typedef err_t ( * netif_output_fn ) ( struct netif * netif , struct pbuf * p ,
ip_addr_t * ipaddr ) ;
/** Function prototype for netif->linkoutput functions. Only used for ethernet
* netifs . This function is called by ARP when a packet shall be sent .
*
* @ param netif The netif which shall send a packet
* @ param p The packet to send ( raw ethernet packet )
*/
typedef err_t ( * netif_linkoutput_fn ) ( struct netif * netif , struct pbuf * p ) ;
/** Function prototype for netif status- or link-callback functions. */
typedef void ( * netif_status_callback_fn ) ( struct netif * netif ) ;
/** Function prototype for netif igmp_mac_filter functions */
typedef err_t ( * netif_igmp_mac_filter_fn ) ( struct netif * netif ,
ip_addr_t * group , u8_t action ) ;
/** Generic data structure used for all lwIP network interfaces.
* The following fields should be filled in by the initialization
* function for the device driver : hwaddr_len , hwaddr [ ] , mtu , flags */
struct netif {
/** pointer to next in linked list */
struct netif * next ;
/** IP address configuration in network byte order */
ip_addr_t ip_addr ;
ip_addr_t netmask ;
ip_addr_t gw ;
/** This function is called by the network device driver
* to pass a packet up the TCP / IP stack . <EFBFBD> <EFBFBD> IP <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݰ <EFBFBD> */
netif_input_fn input ;
/** This function is called by the IP module when it wants
* to send a packet on the interface . This function typically
* first resolves the hardware address , then sends the packet . <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> IP <EFBFBD> <EFBFBD> <EFBFBD> ݰ <EFBFBD> */
netif_output_fn output ;
/** This function is called by the ARP module when it wants
* to send a packet on the interface . This function outputs
* the pbuf as - is on the link medium . <EFBFBD> ײ <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݰ <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> */
netif_linkoutput_fn linkoutput ;
# if LWIP_NETIF_STATUS_CALLBACK
/** This function is called when the netif state is set to up or down
*/
netif_status_callback_fn status_callback ;
# endif /* LWIP_NETIF_STATUS_CALLBACK */
# if LWIP_NETIF_LINK_CALLBACK
/** This function is called when the netif link is set to up or down
*/
netif_status_callback_fn link_callback ;
# endif /* LWIP_NETIF_LINK_CALLBACK */
/** This field can be set by the device driver and could point
* to state information for the device . <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֶ Σ <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ָ <EFBFBD> <EFBFBD> <EFBFBD> ײ <EFBFBD> <EFBFBD> 豸 <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> Ϣ */
void * state ;
# if LWIP_DHCP
/** the DHCP client state information for this netif */
struct dhcp * dhcp ;
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struct udp_pcb * dhcps_pcb ; //dhcps
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void * pad ;
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# endif /* LWIP_DHCP */
# if LWIP_AUTOIP
/** the AutoIP client state information for this netif */
struct autoip * autoip ;
# endif
# if LWIP_NETIF_HOSTNAME
/* the hostname for this netif, NULL is a valid value */
char * hostname ;
# endif /* LWIP_NETIF_HOSTNAME */
/** maximum transfer unit (in bytes) <20> ýӿ<C3BD> <D3BF> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݰ<EFBFBD> <DDB0> <EFBFBD> <EFBFBD> ȣ <EFBFBD> <C8A3> <EFBFBD> <EFBFBD> <EFBFBD> 1500*/
u16_t mtu ;
/** number of bytes used in hwaddr<64> ýӿ<C3BD> <D3BF> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ַ<EFBFBD> <D6B7> <EFBFBD> <EFBFBD> */
u8_t hwaddr_len ;
/** link level hardware address of this interface <20> ýӿ<C3BD> <D3BF> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ַ*/
u8_t hwaddr [ NETIF_MAX_HWADDR_LEN ] ;
/** flags (see NETIF_FLAG_ above) <20> ýӿ<C3BD> ״̬<D7B4> <CCAC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ֶ<EFBFBD> */
u8_t flags ;
/** descriptive abbreviation <20> ýӿڵ<D3BF> <DAB5> <EFBFBD> <EFBFBD> <EFBFBD> */
char name [ 2 ] ;
/** number of this interface <20> ýӿڵı <DAB5> <C4B1> <EFBFBD> */
u8_t num ;
# if LWIP_SNMP
/** link type (from "snmp_ifType" enum from snmp.h) */
u8_t link_type ;
/** (estimate) link speed */
u32_t link_speed ;
/** timestamp at last change made (up/down) */
u32_t ts ;
/** counters */
u32_t ifinoctets ;
u32_t ifinucastpkts ;
u32_t ifinnucastpkts ;
u32_t ifindiscards ;
u32_t ifoutoctets ;
u32_t ifoutucastpkts ;
u32_t ifoutnucastpkts ;
u32_t ifoutdiscards ;
# endif /* LWIP_SNMP */
# if LWIP_IGMP
/** This function could be called to add or delete a entry in the multicast
filter table of the ethernet MAC . */
netif_igmp_mac_filter_fn igmp_mac_filter ;
# endif /* LWIP_IGMP */
# if LWIP_NETIF_HWADDRHINT
u8_t * addr_hint ;
# endif /* LWIP_NETIF_HWADDRHINT */
# if ENABLE_LOOPBACK
/* List of packets to be queued for ourselves. ָ<> <D6B8> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> <CDB8> Լ<EFBFBD> <D4BC> <EFBFBD> <EFBFBD> <EFBFBD> <EFBFBD> ݰ<EFBFBD> <DDB0> <EFBFBD> pbuf*/
struct pbuf * loop_first ; //<2F> <> һ <EFBFBD> <D2BB>
struct pbuf * loop_last ; //<2F> <> <EFBFBD> <EFBFBD> һ <EFBFBD> <D2BB>
# if LWIP_LOOPBACK_MAX_PBUFS
u16_t loop_cnt_current ;
# endif /* LWIP_LOOPBACK_MAX_PBUFS */
# endif /* ENABLE_LOOPBACK */
} ;
# if LWIP_SNMP
# define NETIF_INIT_SNMP(netif, type, speed) \
/* use "snmp_ifType" enum from snmp.h for "type", snmp_ifType_ethernet_csmacd by example */ \
( netif ) - > link_type = ( type ) ; \
/* your link speed here (units: bits per second) */ \
( netif ) - > link_speed = ( speed ) ; \
( netif ) - > ts = 0 ; \
( netif ) - > ifinoctets = 0 ; \
( netif ) - > ifinucastpkts = 0 ; \
( netif ) - > ifinnucastpkts = 0 ; \
( netif ) - > ifindiscards = 0 ; \
( netif ) - > ifoutoctets = 0 ; \
( netif ) - > ifoutucastpkts = 0 ; \
( netif ) - > ifoutnucastpkts = 0 ; \
( netif ) - > ifoutdiscards = 0
# else /* LWIP_SNMP */
# define NETIF_INIT_SNMP(netif, type, speed)
# endif /* LWIP_SNMP */
/** The list of network interfaces. */
extern struct netif * netif_list ;
/** The default network interface. */
extern struct netif * netif_default ;
void netif_init ( void ) ICACHE_FLASH_ATTR ;
struct netif * netif_add ( struct netif * netif , ip_addr_t * ipaddr , ip_addr_t * netmask ,
ip_addr_t * gw , void * state , netif_init_fn init , netif_input_fn input ) ICACHE_FLASH_ATTR ;
void
netif_set_addr ( struct netif * netif , ip_addr_t * ipaddr , ip_addr_t * netmask ,
ip_addr_t * gw ) ICACHE_FLASH_ATTR ;
void netif_remove ( struct netif * netif ) ICACHE_FLASH_ATTR ;
/* Returns a network interface given its name. The name is of the form
" et0 " , where the first two letters are the " name " field in the
netif structure , and the digit is in the num field in the same
structure . */
struct netif * netif_find ( char * name ) ICACHE_FLASH_ATTR ;
void netif_set_default ( struct netif * netif ) ICACHE_FLASH_ATTR ;
void netif_set_ipaddr ( struct netif * netif , ip_addr_t * ipaddr ) ICACHE_FLASH_ATTR ;
void netif_set_netmask ( struct netif * netif , ip_addr_t * netmask ) ICACHE_FLASH_ATTR ;
void netif_set_gw ( struct netif * netif , ip_addr_t * gw ) ICACHE_FLASH_ATTR ;
void netif_set_up ( struct netif * netif ) ICACHE_FLASH_ATTR ;
void netif_set_down ( struct netif * netif ) ICACHE_FLASH_ATTR ;
/** Ask if an interface is up */
# define netif_is_up(netif) (((netif)->flags & NETIF_FLAG_UP) ? (u8_t)1 : (u8_t)0)
# if LWIP_NETIF_STATUS_CALLBACK
void netif_set_status_callback ( struct netif * netif , netif_status_callback_fn status_callback ) ICACHE_FLASH_ATTR ;
# endif /* LWIP_NETIF_STATUS_CALLBACK */
void netif_set_link_up ( struct netif * netif ) ICACHE_FLASH_ATTR ;
void netif_set_link_down ( struct netif * netif ) ICACHE_FLASH_ATTR ;
/** Ask if a link is up */
# define netif_is_link_up(netif) (((netif)->flags & NETIF_FLAG_LINK_UP) ? (u8_t)1 : (u8_t)0)
# if LWIP_NETIF_LINK_CALLBACK
void netif_set_link_callback ( struct netif * netif , netif_status_callback_fn link_callback ) ICACHE_FLASH_ATTR ;
# endif /* LWIP_NETIF_LINK_CALLBACK */
# if LWIP_NETIF_HOSTNAME
# define netif_set_hostname(netif, name) do { if((netif) != NULL) { (netif)->hostname = name; }}while(0)
# define netif_get_hostname(netif) (((netif) != NULL) ? ((netif)->hostname) : NULL)
# endif /* LWIP_NETIF_HOSTNAME */
# if LWIP_IGMP
# define netif_set_igmp_mac_filter(netif, function) do { if((netif) != NULL) { (netif)->igmp_mac_filter = function; }}while(0)
# define netif_get_igmp_mac_filter(netif) (((netif) != NULL) ? ((netif)->igmp_mac_filter) : NULL)
# endif /* LWIP_IGMP */
# if ENABLE_LOOPBACK
err_t netif_loop_output ( struct netif * netif , struct pbuf * p , ip_addr_t * dest_ip ) ICACHE_FLASH_ATTR ;
void netif_poll ( struct netif * netif ) ICACHE_FLASH_ATTR ;
# if !LWIP_NETIF_LOOPBACK_MULTITHREADING
void netif_poll_all ( void ) ICACHE_FLASH_ATTR ;
# endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
# endif /* ENABLE_LOOPBACK */
# ifdef __cplusplus
}
# endif
# endif /* __LWIP_NETIF_H__ */
