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RIOT/sys/net/application_layer/rdcli_simple/rdcli_simple.c

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/*
* Copyright (C) 2017 Freie Universität Berlin
*
* 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.
*/
/**
* @ingroup net_rdcli_simple
* @{
*
* @file
* @brief Simplified CoAP resource directory client implementation
*
* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
*
* @}
*/
#include <string.h>
#include "fmt.h"
#include "net/gcoap.h"
#include "net/rdcli_config.h"
#include "net/rdcli_common.h"
#include "net/rdcli_simple.h"
#define BUFSIZE (128U)
static coap_pkt_t pkt;
static uint8_t buf[BUFSIZE];
/* allocate an UDP endpoint to the RD server */
static const sock_udp_ep_t remote = {
.family = AF_INET6,
.netif = SOCK_ADDR_ANY_NETIF,
.addr = RDCLI_SERVER_ADDR ,
.port = RDCLI_SERVER_PORT
};
int rdcli_simple_register(void)
{
/* build the initial CON packet */
int res = gcoap_req_init(&pkt, buf, sizeof(buf), COAP_METHOD_POST,
"/.well-known/core");
if (res < 0) {
return res;
}
/* make packet confirmable */
coap_hdr_set_type(pkt.hdr, COAP_TYPE_CON);
/* add Uri-Query options */
res = rdcli_common_add_qstring(&pkt);
if (res < 0) {
return res;
}
/* finish, we don't have any payload */
ssize_t len = gcoap_finish(&pkt, 0, COAP_FORMAT_LINK);
return (int)gcoap_req_send2(buf, len, &remote, NULL);
}