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[ntp] Define NTP server setting

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Define the IPv4 NTP server setting to simplify the use of a
DHCP-provided NTP server in scripts, using e.g.

  #!ipxe
  dhcp
  ntp ${ntp}

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2023-07-19 11:10:15 +01:00
parent c30b71ee9c
commit d5c08f78bd
2 changed files with 13 additions and 0 deletions
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3
src/include/ipxe/dhcp.h
View File

@@ -86,6 +86,9 @@ struct dhcp_packet;
/** Maximum transmission unit */ /** Maximum transmission unit */
#define DHCP_MTU 26 #define DHCP_MTU 26
/** NTP servers */
#define DHCP_NTP_SERVERS 42
/** Vendor encapsulated options */ /** Vendor encapsulated options */
#define DHCP_VENDOR_ENCAP 43 #define DHCP_VENDOR_ENCAP 43

10
src/net/udp/ntp.c
View File

@@ -36,6 +36,8 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <ipxe/timer.h> #include <ipxe/timer.h>
#include <ipxe/time.h> #include <ipxe/time.h>
#include <ipxe/tcpip.h> #include <ipxe/tcpip.h>
#include <ipxe/dhcp.h>
#include <ipxe/settings.h>
#include <ipxe/ntp.h> #include <ipxe/ntp.h>
/** @file /** @file
@@ -273,3 +275,11 @@ int start_ntp ( struct interface *job, const char *hostname ) {
err_alloc: err_alloc:
return rc; return rc;
} }
/** IPv4 NTP server setting */
const struct setting ntp_setting __setting ( SETTING_IP4_EXTRA, ntp ) = {
.name = "ntp",
.description = "NTP server",
.tag = DHCP_NTP_SERVERS,
.type = &setting_type_ipv4,
};