| /* |
| * Copyright (c) 2020 Linumiz |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <zephyr/logging/log.h> |
| |
| #include <zephyr/kernel.h> |
| |
| #include <zephyr/net/net_if.h> |
| #include <zephyr/net/net_core.h> |
| #include <zephyr/net/net_context.h> |
| #include <zephyr/net/net_mgmt.h> |
| |
| static struct net_mgmt_event_callback mgmt_cb; |
| |
| /* Semaphore to indicate a lease has been acquired */ |
| static K_SEM_DEFINE(got_address, 0, 1); |
| |
| static void handler(struct net_mgmt_event_callback *cb, |
| uint32_t mgmt_event, |
| struct net_if *iface) |
| { |
| int i; |
| bool notified = false; |
| |
| if (mgmt_event != NET_EVENT_IPV4_ADDR_ADD) { |
| return; |
| } |
| |
| for (i = 0; i < NET_IF_MAX_IPV4_ADDR; i++) { |
| if (iface->config.ip.ipv4->unicast[i].addr_type != |
| NET_ADDR_DHCP) { |
| continue; |
| } |
| |
| if (!notified) { |
| k_sem_give(&got_address); |
| notified = true; |
| } |
| break; |
| } |
| } |
| |
| /** |
| * Start a DHCP client, and wait for a lease to be acquired. |
| */ |
| void app_dhcpv4_startup(void) |
| { |
| struct net_if *iface; |
| |
| net_mgmt_init_event_callback(&mgmt_cb, handler, |
| NET_EVENT_IPV4_ADDR_ADD); |
| net_mgmt_add_event_callback(&mgmt_cb); |
| |
| iface = net_if_get_default(); |
| |
| net_dhcpv4_start(iface); |
| |
| /* Wait for a lease */ |
| k_sem_take(&got_address, K_FOREVER); |
| } |