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[ping] Allow termination after a specified number of packets

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Add the "-c <count>" option to the "ping" command, allowing for
automatic termination after a specified number of packets.

When a number of packets is specified:

  - if a serious error (i.e. length mismatch or content mismatch)
    occurs, then the ping will be immediately terminated with the relevant
    status code;

  - if at least one response is received successfully, and all errors
    are non-serious (i.e. timeouts or out-of-sequence responses), then
    the ping will be terminated after the final response (or timeout)
    with a success status;

  - if no responses are received successfully, then the ping will be
    terminated after the final timeout with ETIMEDOUT.

If no number of packets is specified, then the ping will continue
until manually interrupted.

Originally-implemented-by: Cedric Levasseur <cyr-ius@ipocus.net>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2014-10-23 16:30:58 +01:00
parent d1afe731ea
commit 1c34ca70d1
5 changed files with 51 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/usr/pingmgmt.c
View File

@@ -58,14 +58,16 @@ static void ping_callback ( struct sockaddr *peer, unsigned int sequence,
* @v hostname Hostname
* @v timeout Timeout between pings, in ticks
* @v len Payload length
* @v count Number of packets to send (or zero for no limit)
* @ret rc Return status code
*/
int ping ( const char *hostname, unsigned long timeout, size_t len ) {
int ping ( const char *hostname, unsigned long timeout, size_t len,
unsigned int count ) {
int rc;
/* Create pinger */
if ( ( rc = create_pinger ( &monojob, hostname, timeout,
len, ping_callback ) ) != 0 ) {
if ( ( rc = create_pinger ( &monojob, hostname, timeout, len,
count, ping_callback ) ) != 0 ) {
printf ( "Could not start ping: %s\n", strerror ( rc ) );
return rc;
}