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RIOT/sys/net/application_layer/uhcp/uhcpc.c 1.52 KB
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  /*
   * Copyright (C) 2016 Kaspar Schleiser <kaspar@schleiser.de>
   *
   * This file is subject to the terms and conditions of the GNU Lesser
   * General Public License v2.1. See the file LICENSE in the top level
   * directory for more details.
   */
  
  #include <arpa/inet.h>
  
  #include "net/af.h"
  #include "net/sock/udp.h"
  #include "net/uhcp.h"
  #include "xtimer.h"
  
  /**
   * @brief Request prefix from uhcp server
   *
   * Never returns.
   * Calls @c uhcp_handle_prefix() when a prefix or prefix change is received.
   *
   * @param[in]   iface   interface to request prefix on
   */
  void uhcp_client(uhcp_iface_t iface)
  {
      sock_udp_t sock;
      sock_udp_ep_t local = { .family=AF_INET6, .port=UHCP_PORT, .netif=iface };
      sock_udp_ep_t req_target = { .family=AF_INET6, .port=UHCP_PORT, .netif=iface };
      sock_udp_ep_t remote;
  
      inet_pton(AF_INET6, "ff15::abcd", req_target.addr.ipv6);
  
      /* prepare UHCP header */
      uhcp_req_t req;
      uhcp_hdr_set(&req.hdr, UHCP_REQ);
      req.prefix_len = 64;
  
      /* create listening socket */
      int res = sock_udp_create(&sock, &local, NULL, 0);
  
      uint8_t buf[sizeof(uhcp_push_t) + 16];
  
      while(1) {
          puts("uhcp_client(): sending REQ...");
          sock_udp_send(&sock, &req, sizeof(uhcp_req_t), &req_target);
          res = sock_udp_recv(&sock, buf, sizeof(buf), 10U*US_PER_SEC, &remote);
          if (res > 0) {
              uhcp_handle_udp(buf, res, remote.addr.ipv6, remote.port, iface);
              xtimer_sleep(60);
          }
          else {
              puts("uhcp_client(): no reply received");
          }
      }
  }