ping.c File Reference

Ping sender module.

#include "lwip/opt.h"
#include "ping.h"
#include "lwip/mem.h"
#include "lwip/raw.h"
#include "lwip/icmp.h"
#include "lwip/netif.h"
#include "lwip/sys.h"
#include "lwip/timers.h"
#include "lwip/inet_chksum.h"
#include "lwip/sockets.h"
#include "lwip/inet.h"

Macros
#define	PING_DATA_SIZE   32
	ping additional data size to include in the packet More...
#define	PING_DEBUG   LWIP_DBG_ON
	This is an example of a "ping" sender (with raw API and socket API). More...
#define	PING_DELAY   1000
	ping delay - in milliseconds More...
#define	PING_ID   0xAFAF
	ping identifier - must fit on a u16_t More...
#define	PING_RCV_TIMEO   5000
	ping receive timeout - in milliseconds More...
#define	PING_RESULT(ping_ok)
	ping result action - no default action More...
#define	PING_TARGET   (netif_default?netif_default->gw:ip_addr_any)
	ping target - should be a "ip_addr_t" More...

Functions
void	ping_function (char *addr, u32_t PingCount)
static void	ping_prepare_echo (struct icmp_echo_hdr *iecho, u16_t len)
	Prepare a echo ICMP request. More...
static void	ping_recv (int s)
static err_t	ping_send (int s, ip_addr_t *addr)

Variables
static u16_t	ping_seq_num
static u32_t	ping_time

#define PING_DATA_SIZE   32

ping additional data size to include in the packet

#define PING_DEBUG   LWIP_DBG_ON

This is an example of a "ping" sender (with raw API and socket API).

It can be used as a start point to maintain opened a network connection, or like a network "watchdog" for your device. PING_DEBUG: Enable debugging for PING.

Referenced by ping_function(), and ping_recv().

#define PING_DELAY   1000

ping delay - in milliseconds

Referenced by ping_function().

#define PING_ID   0xAFAF

ping identifier - must fit on a u16_t

Referenced by ping_prepare_echo(), and ping_recv().

#define PING_RCV_TIMEO   5000

ping receive timeout - in milliseconds

Referenced by ping_function().

#define PING_RESULT

(

ping_ok

)

ping result action - no default action

Referenced by ping_recv().

#define PING_TARGET   (netif_default?netif_default->gw:ip_addr_any)

ping target - should be a "ip_addr_t"

void ping_function	(	char *	addr,
		u32_t	PingCount
	)

References AF_INET, close, ERR_OK, inet_pton, ip_addr_debug_print, IP_PROTO_ICMP, LWIP_DEBUGF, lwip_setsockopt(), lwip_socket(), osprintf(), PING_DEBUG, PING_DELAY, PING_RCV_TIMEO, ping_recv(), ping_send(), ping_time, SO_RCVTIMEO, SOCK_RAW, SOL_SOCKET, sys_msleep(), sys_now(), and timeout.

static void ping_prepare_echo ( struct icmp_echo_hdr *  iecho, u16_t  len  )

static

Prepare a echo ICMP request.

References htons, ICMP_ECHO, ICMPH_CODE_SET, ICMPH_TYPE_SET, inet_chksum(), PING_ID, and ping_seq_num.

Referenced by ping_send().

static void ping_recv ( int  s )

static

References htons, ICMP_ER, ICMPH_TYPE, inet_addr_to_ipaddr, ip_addr_debug_print, IPH_HL, LWIP_DEBUGF, lwip_recvfrom(), MSG_DONTWAIT, PING_DEBUG, PING_ID, PING_RESULT, ping_seq_num, ping_time, sockaddr_in::sin_addr, sys_now(), and U32_F.

Referenced by ping_function().

static err_t ping_send ( int  s, ip_addr_t *  addr  )

static

References AF_INET, ERR_MEM, ERR_OK, ERR_VAL, inet_addr_from_ipaddr, LWIP_ASSERT, lwip_sendto(), mem_free, mem_malloc, ping_prepare_echo(), sockaddr_in::sin_addr, sockaddr_in::sin_family, and sockaddr_in::sin_len.

Referenced by ping_function().

u16_t ping_seq_num

static

Referenced by ping_prepare_echo(), and ping_recv().

u32_t ping_time

static

Referenced by ping_function(), and ping_recv().