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Fix for getting dispersion instead of jitter on older servers (like xntpd on Solaris).

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git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@1676 f882894a-f735-0410-b71e-b25c423dba1c
This commit is contained in:
Thomas Guyot-Sionnest 2007-04-04 20:08:59 +00:00
parent b19f0704f3
commit cff02b30d5
1 changed files with 13 additions and 2 deletions
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15
plugins/check_ntp.c
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@ -507,6 +507,7 @@ double jitter_request(const char *host, int *status){
int peers_size=0, peer_offset=0;
ntp_assoc_status_pair *peers=NULL;
ntp_control_message req;
const char *getvar = "jitter";
double rval = 0.0, jitter = -1.0;
char *startofvalue=NULL, *nptr=NULL;
void *tmp;
@ -584,8 +585,10 @@ double jitter_request(const char *host, int *status){
* thus reducing net traffic, guaranteeing us only a single
* datagram in reply, and making intepretation much simpler
*/
strncpy(req.data, "jitter", 6);
req.count = htons(6);
/* Older servers doesn't know what jitter is, so if we get an
* error on the first pass we redo it with "dispersion" */
strncpy(req.data, getvar, MAX_CM_SIZE-1);
req.count = htons(strlen(getvar));
DBG(printf("sending READVAR request...\n"));
write(conn, &req, SIZEOF_NTPCM(req));
DBG(print_ntp_control_message(&req));
@ -595,6 +598,14 @@ double jitter_request(const char *host, int *status){
read(conn, &req, SIZEOF_NTPCM(req));
DBG(print_ntp_control_message(&req));
if(req.op&REM_ERROR && strstr(getvar, "jitter")) {
if(verbose) printf("The 'jitter' command failed (old ntp server?)\nRestarting with 'dispersion'...\n");
getvar = "dispersion";
num_selected--;
i--;
continue;
}
/* get to the float value */
if(verbose) {
printf("parsing jitter from peer %.2x: ", ntohs(peers[i].assoc));