1 /* DHCPv4 client startup. */
2
3 /*
4 * Copyright (c) 2018 Linaro Ltd
5 * Copyright (c) 2023 Lucas Dietrich <ld.adecy@gmail.com>
6 *
7 * SPDX-License-Identifier: Apache-2.0
8 */
9
10 #include <zephyr/logging/log.h>
11
12 LOG_MODULE_DECLARE(aws, LOG_LEVEL_DBG);
13
14 #include <zephyr/kernel.h>
15
16 #include <zephyr/net/net_if.h>
17 #include <zephyr/net/net_core.h>
18 #include <zephyr/net/net_context.h>
19 #include <zephyr/net/net_mgmt.h>
20
21 static struct net_mgmt_event_callback mgmt_cb;
22
23 /* Semaphore to indicate a lease has been acquired. */
24 static K_SEM_DEFINE(got_address, 0, 1);
25
handler(struct net_mgmt_event_callback * cb,uint32_t mgmt_event,struct net_if * iface)26 static void handler(struct net_mgmt_event_callback *cb,
27 uint32_t mgmt_event,
28 struct net_if *iface)
29 {
30 int i;
31 bool notified = false;
32
33 if (mgmt_event != NET_EVENT_IPV4_ADDR_ADD) {
34 return;
35 }
36
37 for (i = 0; i < NET_IF_MAX_IPV4_ADDR; i++) {
38 if (iface->config.ip.ipv4->unicast[i].ipv4.addr_type !=
39 NET_ADDR_DHCP) {
40 continue;
41 }
42
43 if (!notified) {
44 k_sem_give(&got_address);
45 notified = true;
46 }
47 break;
48 }
49 }
50
51 /**
52 * Start a DHCP client, and wait for a lease to be acquired.
53 */
app_dhcpv4_startup(void)54 void app_dhcpv4_startup(void)
55 {
56 LOG_INF("starting DHCPv4");
57
58 net_mgmt_init_event_callback(&mgmt_cb, handler,
59 NET_EVENT_IPV4_ADDR_ADD);
60 net_mgmt_add_event_callback(&mgmt_cb);
61
62 net_dhcpv4_start(net_if_get_default());
63
64 /* Wait for a lease. */
65 k_sem_take(&got_address, K_FOREVER);
66 }
67
