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ping4:Set the filter for reply packet. #3316

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1 change: 1 addition & 0 deletions include/netutils/icmp_ping.h
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Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,7 @@
#define ICMP_E_RECVFROM -13 /* extra: error code */
#define ICMP_E_RECVSMALL -15 /* extra: recv bytes */
#define ICMP_E_BINDDEV -17 /* extra: error bind */
#define ICMP_E_FILTER -19 /* extra: error filter */

/* Negative even number represent warning(recoverable) */

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17 changes: 17 additions & 0 deletions netutils/ping/icmp_ping.c
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Original file line number Diff line number Diff line change
Expand Up @@ -53,6 +53,7 @@
****************************************************************************/

#define ICMP_IOBUFFER_SIZE(x) (sizeof(struct icmp_hdr_s) + (x))
#define ICMP_SET_FILTER(t) (~(1U << (t)))

/****************************************************************************
* Private Types
Expand Down Expand Up @@ -197,6 +198,9 @@ void icmp_ping(FAR const struct ping_info_s *info)
int ret;
int ch;
int i;
#ifdef CONFIG_NET_SOCKOPTS
int filter;
#endif

g_exiting = false;
signal(SIGINT, sigexit);
Expand Down Expand Up @@ -246,6 +250,19 @@ void icmp_ping(FAR const struct ping_info_s *info)
}
#endif

#ifdef CONFIG_NET_SOCKOPTS
filter = ICMP_SET_FILTER(ICMP_ECHO_REPLY);
ret = setsockopt(priv->sockfd, IPPROTO_ICMP, ICMP_FILTER,
&filter, sizeof(filter));
if (ret < 0)
{
icmp_callback(&result, ICMP_E_FILTER, errno);
close(priv->sockfd);
free(priv);
return;
}
#endif

priv->kickoff = clock();

memset(&priv->destaddr, 0, sizeof(struct sockaddr_in));
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