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Derive MAC Address from board unique_id

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This commit is contained in:
Adam Comley 2024-03-17 14:05:18 -05:00 committed by Xiang Xiao
parent b311c46778
commit c15a6970c9
2 changed files with 18 additions and 2 deletions
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8
netutils/netinit/Kconfig
View File

@ -474,6 +474,14 @@ choice
address to the hardware before it brings the network up. This
choice allows you select the source of that MAC address.
config NETINIT_UIDMAC
bool "Board Unique ID"
depends on BOARDCTL_UNIQUEID
---help---
Assign a MAC address based on the board unique ID.
CONFIG_BOARDCTL_UNIQUEID_SIZE must be at least 6 bytes for
Ethernet, 8 bytes for 6LOWPAN.
config NETINIT_SWMAC
bool "Fixed address"
---help---

12
netutils/netinit/netinit.c
View File

@ -48,6 +48,7 @@
#include <unistd.h>
#include <nuttx/net/mii.h>
#include <sys/boardctl.h>
#include "netutils/netlib.h"
#if defined(CONFIG_NETUTILS_DHCPC) || defined(CONFIG_NETINIT_DNS)
@ -289,7 +290,9 @@ static const uint16_t g_ipv6_netmask[8] =
defined(HAVE_MAC)
static void netinit_set_macaddr(void)
{
#if defined(CONFIG_NET_ETHERNET)
#if defined(CONFIG_NETINIT_UIDMAC)
uint8_t uid[CONFIG_BOARDCTL_UNIQUEID_SIZE];
#elif defined(CONFIG_NET_ETHERNET)
uint8_t mac[IFHWADDRLEN];
#elif defined(HAVE_EADDR)
uint8_t eaddr[8];
@ -297,7 +300,12 @@ static void netinit_set_macaddr(void)
/* Many embedded network interfaces must have a software assigned MAC */
#if defined(CONFIG_NET_ETHERNET)
#if defined(CONFIG_NETINIT_UIDMAC)
boardctl(BOARDIOC_UNIQUEID, (uintptr_t)&uid);
uid[0] = (uid[0] & 0b11110000) | 2; /* Locally Administered MAC */
netlib_setmacaddr(NET_DEVNAME, uid);
#elif defined(CONFIG_NET_ETHERNET)
/* Use the configured, fixed MAC address */
mac[0] = (CONFIG_NETINIT_MACADDR_2 >> (8 * 1)) & 0xff;