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ntp: add options for compensating HW timestamping errors

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This commit is contained in:
Miroslav Lichvar
2017-01-05 16:37:28 +01:00
parent 8efec1d640
commit cacbe9976f
5 changed files with 108 additions and 36 deletions
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63
conf.c
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@@ -223,7 +223,13 @@ static char *leapsec_tz = NULL;
/* Name of the user to which will be dropped root privileges. */
static char *user;
/* Array of strings for interfaces with HW timestamping */
typedef struct {
char *name;
double tx_comp;
double rx_comp;
} HwTs_Interface;
/* Array of HwTs_Interface */
static ARR_Instance hwts_interfaces;
typedef struct {
@@ -327,7 +333,7 @@ CNF_Initialise(int r)
{
restarted = r;
hwts_interfaces = ARR_CreateInstance(sizeof (char *));
hwts_interfaces = ARR_CreateInstance(sizeof (HwTs_Interface));
init_sources = ARR_CreateInstance(sizeof (IPAddr));
ntp_sources = ARR_CreateInstance(sizeof (NTP_Source));
@@ -354,7 +360,7 @@ CNF_Finalise(void)
unsigned int i;
for (i = 0; i < ARR_GetSize(hwts_interfaces); i++)
Free(*(char **)ARR_GetElement(hwts_interfaces, i));
Free(((HwTs_Interface *)ARR_GetElement(hwts_interfaces, i))->name);
ARR_DestroyInstance(hwts_interfaces);
for (i = 0; i < ARR_GetSize(ntp_sources); i++)
@@ -1245,8 +1251,39 @@ parse_tempcomp(char *line)
static void
parse_hwtimestamp(char *line)
{
check_number_of_args(line, 1);
*(char **)ARR_GetNewElement(hwts_interfaces) = Strdup(line);
HwTs_Interface *iface;
char *p;
int n;
if (!*line) {
command_parse_error();
return;
}
p = line;
line = CPS_SplitWord(line);
iface = ARR_GetNewElement(hwts_interfaces);
iface->name = Strdup(p);
iface->tx_comp = 0.0;
iface->rx_comp = 0.0;
for (p = line; *p; line += n, p = line) {
line = CPS_SplitWord(line);
if (!strcasecmp(p, "rxcomp")) {
if (sscanf(line, "%lf%n", &iface->rx_comp, &n) != 1)
break;
} else if (!strcasecmp(p, "txcomp")) {
if (sscanf(line, "%lf%n", &iface->tx_comp, &n) != 1)
break;
} else {
break;
}
}
if (*p)
command_parse_error();
}
/* ================================================== */
@@ -1930,8 +1967,18 @@ CNF_GetInitStepThreshold(void)
/* ================================================== */
ARR_Instance
CNF_GetHwTsInterfaces(void)
int
CNF_GetHwTsInterface(unsigned int index, char **name, double *tx_comp, double *rx_comp)
{
return hwts_interfaces;
HwTs_Interface *iface;
if (index >= ARR_GetSize(hwts_interfaces))
return 0;
iface = ARR_GetElement(hwts_interfaces, index);
*name = iface->name;
*tx_comp = iface->tx_comp;
*rx_comp = iface->rx_comp;
return 1;
}