lwIP
2.1.0
Lightweight IP stack
|
Functions | |
void | lwip_init (void) |
err_t | ip_input (struct pbuf *p, struct netif *inp) |
err_t | netif_input (struct pbuf *p, struct netif *inp) |
void | sys_check_timeouts (void) |
err_t | ethernet_input (struct pbuf *p, struct netif *netif) |
Use this mode if you do not run an OS on your system. #define NO_SYS to 1. Feed incoming packets to netif->input(pbuf, netif) function from mainloop, not from interrupt context. You can allocate a Packet buffers (PBUF) in interrupt context and put them into a queue which is processed from mainloop.
Call sys_check_timeouts() periodically in the mainloop.
Porting: implement all functions in Time, Critical sections and Compiler/platform abstraction.
You can only use "raw" APIs in this mode.
Sample code:
Process received ethernet frames. Using this function instead of directly calling ip_input and passing ARP frames through etharp in ethernetif_input, the ARP cache is protected from concurrent access.
Don't call directly, pass to netif_add() and call netif->input().
p | the received packet, p->payload pointing to the ethernet header |
netif | the network interface on which the packet was received |
If both IP versions are enabled, this function can dispatch packets to the correct one. Don't call directly, pass to netif_add() and call netif->input().
void lwip_init | ( | void | ) |
Initialize all modules. Use this in NO_SYS mode. Use tcpip_init() otherwise.
Forwards a received packet for input processing with ethernet_input() or ip_input() depending on netif flags. Don't call directly, pass to netif_add() and call netif->input(). Only works if the netif driver correctly sets NETIF_FLAG_ETHARP and/or NETIF_FLAG_ETHERNET flag!
void sys_check_timeouts | ( | void | ) |
Handle timeouts for NO_SYS==1 (i.e. without using tcpip_thread/sys_timeouts_mbox_fetch(). Uses sys_now() to call timeout handler functions when timeouts expire.
Must be called periodically from your main loop.