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lwIP network interface abstraction More...
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Functions | |
struct netif * | netif_add (struct netif *netif, struct ip_addr *ipaddr, struct ip_addr *netmask, struct ip_addr *gw, void *state, err_t(*init)(struct netif *netif), err_t(*input)(struct pbuf *p, struct netif *netif)) |
Add a network interface to the list of lwIP netifs. | |
void | netif_set_addr (struct netif *netif, struct ip_addr *ipaddr, struct ip_addr *netmask, struct ip_addr *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, struct ip_addr *ipaddr) |
Change the IP address of a network interface. | |
void | netif_set_gw (struct netif *netif, struct ip_addr *gw) |
Change the default gateway for a network interface. | |
void | netif_set_netmask (struct netif *netif, struct ip_addr *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. | |
u8_t | netif_is_up (struct netif *netif) |
Ask if an interface is up. | |
void | netif_set_status_callback (struct netif *netif, void(*status_callback)(struct netif *netif)) |
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. | |
u8_t | netif_is_link_up (struct netif *netif) |
Ask if a link is up. | |
void | netif_set_link_callback (struct netif *netif, void(*link_callback)(struct netif *netif)) |
Set callback to be called when link is brought up/down. | |
err_t | netif_loop_output (struct netif *netif, struct pbuf *p, struct ip_addr *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. | |
Variables | |
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, |
struct ip_addr * | ipaddr, | ||
struct ip_addr * | netmask, | ||
struct ip_addr * | gw, | ||
void * | state, | ||
err_t(*)(struct netif *netif) | init, | ||
err_t(*)(struct pbuf *p, struct netif *netif) | 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.
struct netif* netif_find | ( | char * | name ) | [read] |
u8_t netif_is_link_up | ( | struct netif * | netif ) |
u8_t netif_is_up | ( | struct netif * | netif ) |
err_t netif_loop_output | ( | struct netif * | netif, |
struct pbuf * | p, | ||
struct ip_addr * | 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
void netif_poll | ( | struct netif * | netif ) |
Call netif_poll() in the main loop of your application.
This is to prevent reentering non-reentrant functions like tcp_input(). Packets passed to netif_loop_output() are put on a list that is passed to netif->input() by netif_poll().
void netif_poll_all | ( | void | ) |
Calls netif_poll() for every netif on the netif_list.
void netif_remove | ( | struct netif * | netif ) |
void netif_set_addr | ( | struct netif * | netif, |
struct ip_addr * | ipaddr, | ||
struct ip_addr * | netmask, | ||
struct ip_addr * | gw | ||
) |
void netif_set_default | ( | struct netif * | netif ) |
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()
void netif_set_gw | ( | struct netif * | netif, |
struct ip_addr * | 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
void netif_set_ipaddr | ( | struct netif * | netif, |
struct ip_addr * | 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
void netif_set_link_down | ( | struct netif * | netif ) |
void netif_set_link_up | ( | struct netif * | netif ) |
Called by a driver when its link goes up.
For Ethernet network interfaces, we would like to send a "gratuitous ARP"; this is an ARP packet sent by a node in order to spontaneously cause other nodes to update an entry in their ARP cache. From RFC 3220 "IP Mobility Support for IPv4" section 4.6.
void netif_set_netmask | ( | struct netif * | netif, |
struct ip_addr * | 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
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()
For Ethernet network interfaces, we would like to send a "gratuitous ARP"; this is an ARP packet sent by a node in order to spontaneously cause other nodes to update an entry in their ARP cache. From RFC 3220 "IP Mobility Support for IPv4" section 4.6.
Variable Documentation
struct netif* netif_default |
struct netif* netif_list |
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