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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "dns-domain.h"
#include "networkd-network.h"
#include "networkd-ntp.h"
#include "parse-util.h"
#include "strv.h"
/* Let's assume that anything above this number is a user misconfiguration. */
#define MAX_NTP_SERVERS 128U
bool link_get_use_ntp(Link *link, NetworkConfigSource proto) {
int n, c;
assert(link);
if (!link->network)
return false;
switch (proto) {
case NETWORK_CONFIG_SOURCE_DHCP4:
n = link->network->dhcp_use_ntp;
c = link->network->compat_dhcp_use_ntp;
break;
case NETWORK_CONFIG_SOURCE_DHCP6:
n = link->network->dhcp6_use_ntp;
c = link->network->compat_dhcp_use_ntp;
break;
default:
assert_not_reached();
}
/* If per-network and per-protocol setting is specified, use it. */
if (n >= 0)
return n;
/* If compat setting is specified, use it. */
if (c >= 0)
return c;
/* Otherwise, defaults to yes. */
return true;
}
int config_parse_ntp(
const char *unit,
const char *filename,
unsigned line,
const char *section,
unsigned section_line,
const char *lvalue,
int ltype,
const char *rvalue,
void *data,
void *userdata) {
char ***l = ASSERT_PTR(data);
int r;
assert(filename);
assert(lvalue);
assert(rvalue);
if (isempty(rvalue)) {
*l = strv_free(*l);
return 0;
}
for (const char *p = rvalue;;) {
_cleanup_free_ char *w = NULL;
r = extract_first_word(&p, &w, NULL, 0);
if (r == -ENOMEM)
return log_oom();
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to extract NTP server name, ignoring: %s", rvalue);
return 0;
}
if (r == 0)
return 0;
r = dns_name_is_valid_or_address(w);
if (r <= 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"%s is not a valid domain name or IP address, ignoring.", w);
continue;
}
if (strv_length(*l) > MAX_NTP_SERVERS) {
log_syntax(unit, LOG_WARNING, filename, line, 0,
"More than %u NTP servers specified, ignoring \"%s\" and any subsequent entries.",
MAX_NTP_SERVERS, w);
return 0;
}
r = strv_consume(l, TAKE_PTR(w));
if (r < 0)
return log_oom();
}
}
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