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netif.c File Reference
lwIP network interface abstraction
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static err_t netif_loopif_init (struct netif *netif ) Initialize a lwip network interface structure for a loopback interface. 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) Add a network interface to the list of lwIP netifs. void netif_set_addr (struct netif *netif , ip_addr_t *ipaddr, ip_addr_t *netmask, ip_addr_t *gw) Change IP address configuration for a network interface (including netmask and default gateway). void netif_remove (struct netif *netif ) Remove a network interface from the list of lwIP netifs. struct netif * netif_find (char *name) Find a network interface by searching for its name. void netif_set_ipaddr (struct netif *netif , ip_addr_t *ipaddr) Change the IP address of a network interface. void netif_set_gw (struct netif *netif , ip_addr_t *gw) Change the default gateway for a network interface. void netif_set_netmask (struct netif *netif , ip_addr_t *netmask) Change the netmask of a network interface. void netif_set_default (struct netif *netif ) Set a network interface as the default network interface (used to output all packets for which no specific route is found) void netif_set_up (struct netif *netif ) Bring an interface up, available for processing traffic. void netif_set_down (struct netif *netif ) Bring an interface down, disabling any traffic processing. void netif_set_status_callback (struct netif *netif , netif_status_callback_fn status_callback) Set callback to be called when interface is brought up/down. void netif_set_link_up (struct netif *netif ) Called by a driver when its link goes up. void netif_set_link_down (struct netif *netif ) Called by a driver when its link goes down. void netif_set_link_callback (struct netif *netif , netif_status_callback_fn link_callback) Set callback to be called when link is brought up/down. err_t netif_loop_output (struct netif *netif , struct pbuf *p, ip_addr_t *ipaddr) Send an IP packet to be received on the same netif (loopif-like). void netif_poll (struct netif *netif ) Call netif_poll() in the main loop of your application. void netif_poll_all (void) Calls netif_poll() for every netif on the netif_list. struct netif * netif_list The list of network interfaces. struct netif * netif_default The default network interface.
Detailed Description
lwIP network interface abstraction
Definition in file netif.c .
Function Documentation
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
)
[read]
Add a network interface to the list of lwIP netifs.
Parameters:
netif a pre-allocated netif structure ipaddr IP address for the new netif netmask network mask for the new netif gw default gateway IP address for the new netif state opaque data passed to the new netif init callback function that initializes the interface input callback function that is called to pass ingress packets up in the protocol layer stack.
Returns: netif, or NULL if failed. Definition at line 137 of file netif.c .
struct netif * netif_find
(
char *
name )
[read]
Find a network interface by searching for its name.
Parameters:
name the name of the netif (like netif->name) plus concatenated number in ascii representation (e.g. 'en0')
Definition at line 286 of file netif.c .
err_t netif_loop_output
(
struct netif *
netif ,
struct pbuf *
p ,
ip_addr_t *
ipaddr
)
Send an IP packet to be received on the same netif (loopif-like).
The pbuf is simply copied and handed back to netif->input. In multithreaded mode, this is done directly since netif->input must put the packet on a queue. In callback mode, the packet is put on an internal queue and is fed to netif->input by netif_poll() .
Parameters:
netif the lwip network interface structure p the (IP) packet to 'send' ipaddr the ip address to send the packet to (not used)
Returns: ERR_OK if the packet has been sent ERR_MEM if the pbuf used to copy the packet couldn't be allocated Definition at line 594 of file netif.c .
static err_t netif_loopif_init
(
struct netif *
netif )
[static]
Initialize a lwip network interface structure for a loopback interface.
Parameters:
netif the lwip network interface structure for this loopif
Returns: ERR_OK if the loopif is initialized ERR_MEM if private data couldn't be allocated Definition at line 89 of file netif.c .
void netif_poll
(
struct netif *
netif )
void netif_poll_all
(
void
)
void netif_remove
(
struct netif *
netif )
Remove a network interface from the list of lwIP netifs.
Parameters:
netif the network interface to remove
Definition at line 236 of file netif.c .
void netif_set_addr
(
struct netif *
netif ,
ip_addr_t *
ipaddr ,
ip_addr_t *
netmask ,
ip_addr_t *
gw
)
Change IP address configuration for a network interface (including netmask and default gateway).
Parameters:
netif the network interface to change ipaddr the new IP address netmask the new netmask gw the new default gateway
Definition at line 222 of file netif.c .
void netif_set_default
(
struct netif *
netif )
Set a network interface as the default network interface (used to output all packets for which no specific route is found)
Parameters:
netif the default network interface
Definition at line 432 of file netif.c .
void netif_set_down
(
struct netif *
netif )
Bring an interface down, disabling any traffic processing.
Note: : Enabling DHCP on a down interface will make it come up once configured. See also: dhcp_start() Definition at line 492 of file netif.c .
void netif_set_gw
(
struct netif *
netif ,
ip_addr_t *
gw
)
Change the default gateway for a network interface.
Parameters:
netif the network interface to change gw the new default gateway
Note: call netif_set_addr() if you also want to change ip address and netmask Definition at line 390 of file netif.c .
void netif_set_ipaddr
(
struct netif *
netif ,
ip_addr_t *
ipaddr
)
Change the IP address of a network interface.
Parameters:
netif the network interface to change ipaddr the new IP address
Note: call netif_set_addr() if you also want to change netmask and default gateway Definition at line 319 of file netif.c .
void netif_set_link_callback
(
struct netif *
netif ,
netif_status_callback_fn
link_callback
)
Set callback to be called when link is brought up/down.
Definition at line 570 of file netif.c .
void netif_set_link_down
(
struct netif *
netif )
Called by a driver when its link goes down.
Definition at line 558 of file netif.c .
void netif_set_link_up
(
struct netif *
netif )
Called by a driver when its link goes up.
Definition at line 519 of file netif.c .
void netif_set_netmask
(
struct netif *
netif ,
ip_addr_t *
netmask
)
Change the netmask of a network interface.
Parameters:
netif the network interface to change netmask the new netmask
Note: call netif_set_addr() if you also want to change ip address and default gateway Definition at line 411 of file netif.c .
void netif_set_status_callback
(
struct netif *
netif ,
netif_status_callback_fn
status_callback
)
Set callback to be called when interface is brought up/down.
Definition at line 508 of file netif.c .
void netif_set_up
(
struct netif *
netif )
Bring an interface up, available for processing traffic.
Note: : Enabling DHCP on a down interface will make it come up once configured. See also: dhcp_start() Definition at line 455 of file netif.c .
Variable Documentation
The default network interface.
Definition at line 76 of file netif.c .
The list of network interfaces.
Definition at line 75 of file netif.c .
1.7.2