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netlib: replace DNS ping with gateway ping for connectivity check #3465

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5478167
netlib_ipv6route.c: fix the issue of parsing IPv6 routing entries
zhhyu7 Apr 23, 2026
809598e
netlib: replace DNS ping with gateway ping for connectivity check
zhhyu7 Apr 23, 2026
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33 changes: 31 additions & 2 deletions include/netutils/netlib.h
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Original file line number Diff line number Diff line change
Expand Up @@ -561,12 +561,41 @@ int netlib_getifstatistics(FAR const char *ifname,
int netlib_check_ifconflict(FAR const char *ifname);
#endif

#ifdef CONFIG_NETUTILS_PING
/**
* @brief
* Check network connectivity by pinging a remote IP address.
* If ip is NULL, ping the gateway of each network interface,
* and optionally the routers from the routing table. If ping
* is disabled, just check the status of the IP network card.
*
* @param ip The ipv4 address to check, or NULL to ping gateways
* @param timeout The max timeout of each ping
* @param retry The retry times of ping
*
* @return
* nums of remote reply of ping; a negative on failure
*/

int netlib_check_ipconnectivity(FAR const char *ip, int timeout, int retry);

#ifdef CONFIG_NETUTILS_PING

/**
* @brief
* Check network connectivity by pinging the default gateway
* of the specified network interface.
*
* @param ifname The name of the interface to use
* @param timeout The timeout of ping
* @param retry The retry times of ping
*
* @return
* nums of gateway reply of ping; a negative on failure.
*/

int netlib_check_ifconnectivity(FAR const char *ifname,
int timeout, int retry);
#else
#define netlib_check_ipconnectivity(i, t, r) 1
#define netlib_check_ifconnectivity(i, t, r) 1
#endif

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4 changes: 3 additions & 1 deletion netutils/netlib/CMakeLists.txt
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Expand Up @@ -158,8 +158,10 @@ if(CONFIG_NETUTILS_NETLIB)
list(APPEND SRCS netlib_getiobinfo.c)
endif()

list(APPEND SRCS netlib_checkipconnectivity.c)

if(CONFIG_NETUTILS_PING)
list(APPEND SRCS netlib_checkipconnectivity.c netlib_checkifconnectivity.c)
list(APPEND SRCS netlib_checkifconnectivity.c)
endif()

list(APPEND SRCS netlib_checkhttpconnectivity.c)
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4 changes: 3 additions & 1 deletion netutils/netlib/Makefile
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Expand Up @@ -157,8 +157,10 @@ ifeq ($(CONFIG_MM_IOB),y)
CSRCS += netlib_getiobinfo.c
endif

CSRCS += netlib_checkipconnectivity.c

ifeq ($(CONFIG_NETUTILS_PING),y)
CSRCS += netlib_checkipconnectivity.c netlib_checkifconnectivity.c
CSRCS += netlib_checkifconnectivity.c
endif

CSRCS += netlib_checkhttpconnectivity.c
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7 changes: 4 additions & 3 deletions netutils/netlib/netlib_checkifconnectivity.c
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Expand Up @@ -48,15 +48,16 @@
* Name: netlib_check_ifconnectivity
*
* Description:
* Check network interface connectivity by pinging the gateway
* Check network connectivity by pinging the default gateway
* of the specified network interface.
*
* Parameters:
* ifname The name of the interface to use
* timeout The timeout of ping
* retry The retry times of ping
*
* Return:
* nums of gateway reply of ping; a nagtive on failure.
* nums of gateway reply of ping; a negative on failure.
*
****************************************************************************/

Expand Down Expand Up @@ -86,4 +87,4 @@ int netlib_check_ifconnectivity(FAR const char *ifname,
return netlib_check_ipconnectivity(destip, timeout, retry);
}

#endif /* CONFIG_NETUTILS_PING */
#endif /* CONFIG_NETUTILS_PING */
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