text: /****************************************************************************
   * apps/wireless/ieee802154/i8sak/i8sak_assoc.c
   * IEEE 802.15.4 Swiss Army Knife
   *
   *   Copyright (C) 2014-2015, 2017 Gregory Nutt. All rights reserved.
   *   Copyright (C) 2014-2015 Sebastien Lorquet. All rights reserved.
   *   Copyright (C) 2017 Verge Inc. All rights reserved.
   *
   *   Author: Sebastien Lorquet <sebastien@lorquet.fr>
   *   Author: Anthony Merlino <anthony@vergeaero.com>
   *   Author: Gregory Nutt <gnutt@nuttx.org>
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   * 3. Neither the name NuttX nor the names of its contributors may be
   *    used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
   * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
   * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   ****************************************************************************/
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <nuttx/config.h>
  
  #include <sys/ioctl.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <unistd.h>
  #include <string.h>
  #include <errno.h>
  #include <fcntl.h>
  #include <nuttx/fs/ioctl.h>
  #include <nuttx/wireless/ieee802154/ieee802154_mac.h>
  
  #include "wireless/ieee802154.h"
  
  #include "i8sak.h"
  
  /****************************************************************************
   * Private Function Prototypes
   ****************************************************************************/
  
  static void assoc_eventcb(FAR struct ieee802154_primitive_s *primitive,
                            FAR void *arg);
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Name : i8sak_assoc
   *
   * Description :
   *   Request association with the Coordinator
   ****************************************************************************/
  
  void i8sak_assoc_cmd(FAR struct i8sak_s *i8sak, int argc, FAR char *argv[])
  {
    struct ieee802154_assoc_req_s assocreq;
    struct i8sak_eventfilter_s filter;
    FAR struct ieee802154_pandesc_s *pandesc;
    struct ieee802154_set_req_s setreq;
    bool retry     = false;
    int maxretries = 0;
    int retrycnt;
    int fd = 0;
    int option;
    int optcnt;
    int ret;
    uint8_t resindex;
  
    setreq.attr = IEEE802154_ATTR_MAC_RESPONSE_WAIT_TIME;
    setreq.attrval.mac.resp_waittime = 32;
  
    optcnt = 0;
    while ((option = getopt(argc, argv, ":hp:e:s:w:r:t:")) != ERROR)
      {
        optcnt++;
        switch (option)
          {
            case 'h':
              fprintf(stderr, "Requests association with endpoint\n"
                      "Usage: %s [-h] [-w <count>\n"
                      "    -h = this help menu\n"
                      "    -p = coordinator PAN ID\n"
                      "    -e = coordinator ext address\n"
                      "    -s = coordinator short address\n"
                      "    -w = wait and retry on failure\n"
                      "    -r = use scan result index\n"
                      "    -t = response wait time\n"
                      , argv[0]);
  
              /* Must manually reset optind if we are going to exit early */
  
              optind = -1;
              return;
  
            case 'r':
              resindex = i8sak_str2luint8(optarg);
  
              if (resindex >= i8sak->npandesc)
                {
                  fprintf(stderr, "ERROR: missing argument\n");
  
                  /* Must manually reset optind if we are going to exit early */
  
                  optind = -1;
                  i8sak_cmd_error(i8sak); /* This exits for us */
                }
  
              pandesc = &i8sak->pandescs[resindex];
  
              i8sak->chan   = pandesc->chan;
              i8sak->chpage = pandesc->chpage;
              memcpy(&i8sak->ep_addr, &pandesc->coordaddr,
                     sizeof(struct ieee802154_addr_s));
              break;
  
            case 'p':
  
              /* Parse short address and put it into the i8sak instance */
  
              i8sak_str2panid(optarg, i8sak->ep_addr.panid);
              break;
  
            case 's':
  
              /* Parse short address and put it into the i8sak instance */
  
              i8sak_str2saddr(optarg, i8sak->ep_addr.saddr);
              i8sak->ep_addr.mode = IEEE802154_ADDRMODE_SHORT;
              break;
  
            case 'e':
  
              /* Parse extended address and put it into the i8sak instance */
  
              i8sak_str2eaddr(optarg, i8sak->ep_addr.eaddr);
              i8sak->ep_addr.mode = IEEE802154_ADDRMODE_EXTENDED;
              break;
  
            case 't':
  
              /* Parse wait time and set the parameter in the request */
  
              setreq.attrval.mac.resp_waittime = i8sak_str2luint8(optarg);
              break;
  
            case 'w':
  
              /* Wait and retry if we fail to associate */
  
              retry      = true;
              maxretries = atoi(optarg);
              break;
  
            case ':':
              fprintf(stderr, "ERROR: missing argument\n");
  
              /* Must manually reset optind if we are going to exit early */
  
              optind = -1;
              i8sak_cmd_error(i8sak); /* This exits for us */
  
            case '?':
              fprintf(stderr, "ERROR: unknown argument\n");
  
              /* Must manually reset optind if we are going to exit early */
  
              optind = -1;
              i8sak_cmd_error(i8sak); /* This exits for us */
          }
      }
  
    if (i8sak->mode == I8SAK_MODE_CHAR)
      {
        fd = open(i8sak->ifname, O_RDWR);
        if (fd < 0)
          {
            fprintf(stderr, "ERROR: cannot open %s, errno=%d\n",
                    i8sak->ifname, errno);
            i8sak_cmd_error(i8sak);
          }
  
        ieee802154_set_req(fd, &setreq);
      }
  #ifdef CONFIG_NET_6LOWPAN
    else if (i8sak->mode == I8SAK_MODE_NETIF)
      {
        fd = socket(PF_INET6, SOCK_DGRAM, 0);
        if (fd < 0)
          {
            fprintf(stderr, "ERROR: failed to open socket, errno=%d\n", errno);
            i8sak_cmd_error(i8sak);
          }
  
        sixlowpan_set_req(fd, i8sak->ifname, &setreq);
      }
  #endif
  
    i8sak_requestdaemon(i8sak);
  
    /* Register new callback for receiving the association notifications. */
  
    memset(&filter, 0, sizeof(struct i8sak_eventfilter_s));
    filter.confevents.assoc = true;
  
    i8sak_eventlistener_addreceiver(i8sak, assoc_eventcb, &filter, false);
  
    /* Loop for the specified retry count if the association fails.
     */
  
    retrycnt = 0;
    for (; ; )
      {
        printf("i8sak: issuing ASSOC. request %d\n", retrycnt + 1);
  
        /* Issue association request */
  
        assocreq.chan = i8sak->chan;
        assocreq.chpage = i8sak->chpage;
  
        memcpy(&assocreq.coordaddr, &i8sak->ep_addr,
               sizeof(struct ieee802154_addr_s));
  
        assocreq.capabilities.devtype = 0;
        assocreq.capabilities.powersource = 1;
        assocreq.capabilities.rxonidle = 1;
        assocreq.capabilities.security = 0;
        assocreq.capabilities.allocaddr = 1;
  
        if (i8sak->mode == I8SAK_MODE_CHAR)
          {
            ieee802154_assoc_req(fd, &assocreq);
          }
  #ifdef CONFIG_NET_6LOWPAN
        else if (i8sak->mode == I8SAK_MODE_NETIF)
          {
            sixlowpan_assoc_req(fd, i8sak->ifname, &assocreq);
          }
  #endif
  
        /* Wait for the assocconf event */
  
        i8sak->assoc  = true;
        i8sak->result = -EBUSY;
  
        ret = sem_wait(&i8sak->sigsem);
        if (ret != OK)
          {
            i8sak->assoc = false;
            i8sak_cmd_error(i8sak);
            break;
          }
  
        /* Check if the association was successful */
  
        if (i8sak->result == OK)
          {
            /* Break out and return if the association was successful. */
  
            break;
          }
  
        /* Not successful .. were we asked to retry in the event of an
         * association failure?
         */
  
        if (!retry)
          {
            /* No retries... break out now with the failed association */
  
            break;
          }
  
        /* A retry count of zero means to retry forever.  Otherwise,
         * abort as soon as the maximum number of retries have been
         * performed.
         */
  
        if (maxretries > 0 && retrycnt >= maxretries)
          {
            /* Max retry count exceeded -- break out now with a failed
             * association.
             */
  
            break;
          }
  
        /* Otherwise, wait a bit and try again */
  
        sleep(2);
        retrycnt++;
      }
  
    /* Clean up and return */
  
    i8sak_eventlistener_removereceiver(i8sak, assoc_eventcb);
    i8sak_releasedaemon(i8sak);
    close(fd);
  }
  
  /****************************************************************************
   * Private Functions
   ****************************************************************************/
  
  static void assoc_eventcb(FAR struct ieee802154_primitive_s *primitive,
                            FAR void *arg)
  {
    FAR struct i8sak_s *i8sak = (FAR struct i8sak_s *)arg;
  
    if (primitive->u.assocconf.status == IEEE802154_STATUS_SUCCESS)
      {
        printf("i8sak: ASSOC.request succeeded\n");
        i8sak->result = OK;
      }
    else
      {
        printf("i8sak: ASSOC.request failed: %s\n",
               IEEE802154_STATUS_STRING[primitive->u.assocconf.status]);
        i8sak->result = -EAGAIN;
      }
  
    if (i8sak->assoc)
      {
        i8sak->assoc = false;
        sem_post(&i8sak->sigsem);
      }
  }
  