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92 lines
2.6 KiB
92 lines
2.6 KiB
/* |
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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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#ifdef MICROCOAP_DEBUG |
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#define ENABLE_DEBUG (1) |
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#else |
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#define ENABLE_DEBUG (0) |
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#endif |
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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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