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[WIP] Openthread border router new stack update #101494

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[WIP] Openthread border router new stack update #101494

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8d6f67b
west.yml: Update OpenThread revision
Cristib05 Dec 22, 2025
cc2c2b4
openthread: platform: border_agent: Use OT API to compute ephemeral key
Cristib05 Dec 22, 2025
3de7654
openthread: platform: udp: Use new OT API
Cristib05 Dec 24, 2025
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39 changes: 9 additions & 30 deletions modules/openthread/platform/border_agent.c
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Original file line number Diff line number Diff line change
Expand Up @@ -24,13 +24,11 @@ static struct otInstance *ot_instance_ptr;
static bool border_agent_is_init;

#if defined(CONFIG_OPENTHREAD_BORDER_AGENT_EPHEMERAL_KEY_ENABLE)
/* Byte values, 9 bytes for the key, one for null terminator. */
static uint8_t ephemeral_key_string[10];
static otBorderAgentEphemeralKeyTap eph_passcode;

static uint32_t ephemeral_key_timeout;
static bool epskc_active;

static otError generate_ephemeral_key(void);
static void handle_border_agent_ephemeral_key_callback(void *context);
static otError border_agent_enable_epskc_service(uint32_t timeout);

Expand Down Expand Up @@ -125,29 +123,6 @@ __weak void print_ephemeral_key_expired_message(void)
otCliOutputFormat("\r\nEphemeral Key disabled.\r\n");
}

static otError generate_ephemeral_key(void)
{
otError error = OT_ERROR_NONE;
uint8_t i = 0;
uint32_t random;
char verhoeff_checksum;

memset(ephemeral_key_string, 0, sizeof(ephemeral_key_string));

VerifyOrExit(otPlatEntropyGet((uint8_t *)&random, sizeof(random)) == OT_ERROR_NONE,
error = OT_ERROR_FAILED);
random %= 100000000;
i += snprintf((char *)ephemeral_key_string, sizeof(ephemeral_key_string),
"%08u", random);
VerifyOrExit(otVerhoeffChecksumCalculate((const char *)ephemeral_key_string,
&verhoeff_checksum) == OT_ERROR_NONE,
error = OT_ERROR_FAILED);
snprintf((char *)&ephemeral_key_string[i], sizeof(ephemeral_key_string) - i,
"%c", verhoeff_checksum);
exit:
return error;
}

static void handle_border_agent_ephemeral_key_callback(void *context)
{
char formatted_epskc[12] = {0};
Expand All @@ -165,8 +140,8 @@ static void handle_border_agent_ephemeral_key_callback(void *context)

case OT_BORDER_AGENT_STATE_STARTED:
snprintf(formatted_epskc, sizeof(formatted_epskc), "%.3s %.3s %.3s",
ephemeral_key_string, ephemeral_key_string + 3,
ephemeral_key_string + 6);
eph_passcode.mTap, eph_passcode.mTap + 3,
eph_passcode.mTap + 6);
print_ephemeral_key(formatted_epskc, (uint32_t)(ephemeral_key_timeout / 1000UL));
epskc_active = true;
break;
Expand All @@ -189,9 +164,13 @@ static otError border_agent_enable_epskc_service(uint32_t timeout)
timeout <= OT_BORDER_AGENT_MAX_EPHEMERAL_KEY_TIMEOUT) ?
timeout : OT_BORDER_AGENT_DEFAULT_EPHEMERAL_KEY_TIMEOUT;

VerifyOrExit((generate_ephemeral_key() == OT_ERROR_NONE), error = OT_ERROR_FAILED);
VerifyOrExit(otBorderAgentEphemeralKeyGenerateTap(&eph_passcode) == OT_ERROR_NONE,
error = OT_ERROR_FAILED);
VerifyOrExit(otBorderAgentEphemeralKeyValidateTap(&eph_passcode) == OT_ERROR_NONE,
error = OT_ERROR_FAILED);

error = otBorderAgentEphemeralKeyStart(ot_instance_ptr,
(const char *)ephemeral_key_string,
(const char *)eph_passcode.mTap,
ephemeral_key_timeout, 0);

exit:
Expand Down
3 changes: 1 addition & 2 deletions modules/openthread/platform/udp.c
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Original file line number Diff line number Diff line change
Expand Up @@ -273,8 +273,7 @@ otError otPlatUdpSend(otUdpSocket *aUdpSocket,
peer.sin6_port = net_htons(aMessageInfo->mPeerPort);
memcpy(&peer.sin6_addr, &aMessageInfo->mPeerAddr, sizeof(otIp6Address));

if ((aMessageInfo->mPeerAddr.mFields.m8[0] == 0xfe) &&
((aMessageInfo->mPeerAddr.mFields.m8[1] & 0xc0) == 0x80)) {
if (otIp6IsLinkLocalUnicast((const otIp6Address *)&aMessageInfo->mPeerAddr)) {
if (aMessageInfo->mIsHostInterface) {
peer.sin6_scope_id = ail_iface_index;
} else {
Expand Down
2 changes: 1 addition & 1 deletion west.yml
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Expand Up @@ -353,7 +353,7 @@ manifest:
revision: c30a6d8b92fcebdb797fc1a7698e8729e250f637
path: modules/lib/open-amp
- name: openthread
revision: 2bc7712f57af22058770d1ef131ad3da79a0c764
revision: pull/215/head
path: modules/lib/openthread
- name: percepio
path: modules/debug/percepio
Expand Down
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