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89 lines
2.5 KiB
C
89 lines
2.5 KiB
C
/*
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* Copyright (C) 2015 Kaspar Schleiser <kaspar@schleiser.de>
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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#include "net/af.h"
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#include "net/sock/udp.h"
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#define ENABLE_DEBUG 0
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#include "debug.h"
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#include "coap.h"
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static uint8_t _udp_buf[512]; /* udp read buffer (max udp payload size) */
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uint8_t scratch_raw[1024]; /* microcoap scratch buffer */
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coap_rw_buffer_t scratch_buf = { scratch_raw, sizeof(scratch_raw) };
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#define COAP_SERVER_PORT (5683)
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/*
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* Starts a blocking and never-returning loop dispatching CoAP requests.
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*
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* When using gnrc, make sure the calling thread has an initialized msg queue.
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*/
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void microcoap_server_loop(void)
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{
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static const sock_udp_ep_t local = { .family = AF_INET6,
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.port = COAP_SERVER_PORT };
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sock_udp_ep_t remote;
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sock_udp_t sock;
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int rc = sock_udp_create(&sock, &local, NULL, 0);
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while (1) {
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DEBUG("Waiting for incoming UDP packet...\n");
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rc = sock_udp_recv(&sock, (char *)_udp_buf, sizeof(_udp_buf),
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SOCK_NO_TIMEOUT, &remote);
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if (rc < 0) {
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DEBUG("Error in sock_udp_recv(). rc=%u\n", rc);
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continue;
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}
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size_t n = rc;
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coap_packet_t pkt;
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DEBUG("Received packet: ");
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coap_dump(_udp_buf, n, true);
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DEBUG("\n");
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/* parse UDP packet to CoAP */
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if (0 != (rc = coap_parse(&pkt, _udp_buf, n))) {
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DEBUG("Bad packet rc=%d\n", rc);
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}
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else {
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coap_packet_t rsppkt;
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DEBUG("content:\n");
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coap_dumpPacket(&pkt);
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/* handle CoAP request */
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coap_handle_req(&scratch_buf, &pkt, &rsppkt);
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/* build reply */
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size_t rsplen = sizeof(_udp_buf);
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if ((rc = coap_build(_udp_buf, &rsplen, &rsppkt)) != 0) {
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DEBUG("coap_build failed rc=%d\n", rc);
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}
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else {
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DEBUG("Sending packet: ");
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coap_dump(_udp_buf, rsplen, true);
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DEBUG("\n");
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DEBUG("content:\n");
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coap_dumpPacket(&rsppkt);
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/* send reply via UDP */
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rc = sock_udp_send(&sock, _udp_buf, rsplen, &remote);
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if (rc < 0) {
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DEBUG("Error sending CoAP reply via udp; %u\n", rc);
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}
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}
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}
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}
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}
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