1 /*
2 * Copyright (c) 2020 Linumiz
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #include <zephyr/logging/log.h>
8
9 #include <zephyr/kernel.h>
10
11 #include <zephyr/net/net_if.h>
12 #include <zephyr/net/net_core.h>
13 #include <zephyr/net/net_context.h>
14 #include <zephyr/net/net_mgmt.h>
15
16 static struct net_mgmt_event_callback mgmt_cb;
17
18 /* Semaphore to indicate a lease has been acquired */
19 static K_SEM_DEFINE(got_address, 0, 1);
20
handler(struct net_mgmt_event_callback * cb,uint32_t mgmt_event,struct net_if * iface)21 static void handler(struct net_mgmt_event_callback *cb,
22 uint32_t mgmt_event,
23 struct net_if *iface)
24 {
25 int i;
26 bool notified = false;
27
28 if (mgmt_event != NET_EVENT_IPV4_ADDR_ADD) {
29 return;
30 }
31
32 for (i = 0; i < NET_IF_MAX_IPV4_ADDR; i++) {
33 if (iface->config.ip.ipv4->unicast[i].addr_type !=
34 NET_ADDR_DHCP) {
35 continue;
36 }
37
38 if (!notified) {
39 k_sem_give(&got_address);
40 notified = true;
41 }
42 break;
43 }
44 }
45
46 /**
47 * Start a DHCP client, and wait for a lease to be acquired.
48 */
app_dhcpv4_startup(void)49 void app_dhcpv4_startup(void)
50 {
51 struct net_if *iface;
52
53 net_mgmt_init_event_callback(&mgmt_cb, handler,
54 NET_EVENT_IPV4_ADDR_ADD);
55 net_mgmt_add_event_callback(&mgmt_cb);
56
57 iface = net_if_get_default();
58
59 net_dhcpv4_start(iface);
60
61 /* Wait for a lease */
62 k_sem_take(&got_address, K_FOREVER);
63 }
64
