endpoints.c

#include <stdbool.h>
#include <string.h>
#include "coap.h"

static char light = '0';
static char *allow = "Allow: GET,POST,PUT,DELETE,HEAD,OPTIONS,TRACE";

const uint16_t rsplen = 1500;
static char rsp[1500] = "";
void build_rsp(void);

#include <stdio.h>
void endpoint_setup(void)
{
    build_rsp();
}

static const coap_endpoint_path_t path_well_known_core = {2, {".well-known", "core"}};
static int handle_get_well_known_core(coap_rw_buffer_t *scratch, const coap_packet_t *inpkt, coap_packet_t *outpkt, uint8_t id_hi, uint8_t id_lo)
{
    return coap_make_response(scratch, outpkt, (const uint8_t *)rsp, strlen(rsp), id_hi, id_lo, &inpkt->tok, COAP_RSPCODE_CONTENT, COAP_CONTENTTYPE_APPLICATION_LINKFORMAT);
}
/*
 * Light resource start
 */
static const coap_endpoint_path_t path_light = {1, {"light"}};
static int handle_get_light(coap_rw_buffer_t *scratch, const coap_packet_t *inpkt, coap_packet_t *outpkt, uint8_t id_hi, uint8_t id_lo)
{
    return coap_make_response(scratch, outpkt, (const uint8_t *)&light, 1, id_hi, id_lo, &inpkt->tok, COAP_RSPCODE_CONTENT, COAP_CONTENTTYPE_TEXT_PLAIN);
}

static int handle_put_light(coap_rw_buffer_t *scratch, const coap_packet_t *inpkt, coap_packet_t *outpkt, uint8_t id_hi, uint8_t id_lo)
{
    if (inpkt->payload.len == 0)
        return coap_make_response(scratch, outpkt, NULL, 0, id_hi, id_lo, &inpkt->tok, COAP_RSPCODE_BAD_REQUEST, COAP_CONTENTTYPE_TEXT_PLAIN);
    if (inpkt->payload.p[0] == '1')
    {
    	if(light == 0)
    	{
    		light = '1';
    		printf("Create light : ON\n");
    		return coap_make_response(scratch, outpkt, (const uint8_t *)&light, 1, id_hi, id_lo, &inpkt->tok, COAP_RSPCODE_CREATED, COAP_CONTENTTYPE_TEXT_PLAIN);
    	}
        light = '1';
        printf("ON\n");
        return coap_make_response(scratch, outpkt, (const uint8_t *)&light, 1, id_hi, id_lo, &inpkt->tok, COAP_RSPCODE_CHANGED, COAP_CONTENTTYPE_TEXT_PLAIN);
    }
    else if(inpkt->payload.p[0] == '0')
    {
    	if(light == 0)
    	{
    		light = '0';
    		printf("Create light : OFF\n");
    		return coap_make_response(scratch, outpkt, (const uint8_t *)&light, 1, id_hi, id_lo, &inpkt->tok, COAP_RSPCODE_CREATED, COAP_CONTENTTYPE_TEXT_PLAIN);
    	}
        light = '0';
        printf("OFF\n");
        return coap_make_response(scratch, outpkt, (const uint8_t *)&light, 1, id_hi, id_lo, &inpkt->tok, COAP_RSPCODE_CHANGED, COAP_CONTENTTYPE_TEXT_PLAIN);
    }
    else
    {
        return coap_make_response(scratch, outpkt, NULL, 0, id_hi, id_lo, &inpkt->tok, COAP_RSPCODE_BAD_REQUEST, COAP_CONTENTTYPE_TEXT_PLAIN);
    }
}

static int handle_post_light(coap_rw_buffer_t *scratch, const coap_packet_t *inpkt, coap_packet_t *outpkt, uint8_t id_hi, uint8_t id_lo)
{
	if (inpkt->payload.len == 0)
		return coap_make_response(scratch, outpkt, NULL, 0, id_hi, id_lo, &inpkt->tok, COAP_RSPCODE_BAD_REQUEST, COAP_CONTENTTYPE_TEXT_PLAIN);
    if (inpkt->payload.p[0] == '1')
    {
    	if(light == 0)
    	{
    		light = '1';
    		printf("Create light : ON\n");
    		return coap_make_response(scratch, outpkt, (const uint8_t *)&light, 1, id_hi, id_lo, &inpkt->tok, COAP_RSPCODE_CREATED, COAP_CONTENTTYPE_TEXT_PLAIN);
    	}
        light = '1';
        printf("ON\n");
        return coap_make_response(scratch, outpkt, (const uint8_t *)&light, 1, id_hi, id_lo, &inpkt->tok, COAP_RSPCODE_CHANGED, COAP_CONTENTTYPE_TEXT_PLAIN);
    }
    else if(inpkt->payload.p[0] == '0')
    {
    	if(light == 0)
    	{
    		light = '0';
    		printf("Create light : OFF\n");
    		return coap_make_response(scratch, outpkt, (const uint8_t *)&light, 1, id_hi, id_lo, &inpkt->tok, COAP_RSPCODE_CREATED, COAP_CONTENTTYPE_TEXT_PLAIN);
    	}
        light = '0';
        printf("OFF\n");
        return coap_make_response(scratch, outpkt, (const uint8_t *)&light, 1, id_hi, id_lo, &inpkt->tok, COAP_RSPCODE_CHANGED, COAP_CONTENTTYPE_TEXT_PLAIN);
    }
    else
    {
        return coap_make_response(scratch, outpkt, NULL, 0, id_hi, id_lo, &inpkt->tok, COAP_RSPCODE_BAD_REQUEST, COAP_CONTENTTYPE_TEXT_PLAIN);
    }
}

static int handle_delete_light(coap_rw_buffer_t *scratch, const coap_packet_t *inpkt, coap_packet_t *outpkt, uint8_t id_hi, uint8_t id_lo)
{
	if(light == 0)
	{
        return coap_make_response(scratch, outpkt, NULL, 0, id_hi, id_lo, &inpkt->tok, COAP_RSPCODE_NOT_FOUND, COAP_CONTENTTYPE_TEXT_PLAIN);
	}
	else{
        return coap_make_response(scratch, outpkt, NULL, 0, id_hi, id_lo, &inpkt->tok, COAP_RSPCODE_DELETED, COAP_CONTENTTYPE_TEXT_PLAIN);
	}
}

//TODO 새로운 메서드를 처리할 핸들 생성

//TODO HEAD는 payload 없이 정상적인 response 보내면 끝  -> 무조건 2.05
static int handle_head_light(coap_rw_buffer_t *scratch, const coap_packet_t *inpkt, coap_packet_t *outpkt, uint8_t id_hi, uint8_t id_lo)
{
    return coap_make_response(scratch, outpkt, NULL, 0, id_hi, id_lo, &inpkt->tok, COAP_RSPCODE_CONTENT, COAP_CONTENTTYPE_TEXT_PLAIN);
}
//TODO OPTIONS가 문젠데.. Allow 정보를 payload에 올릴  -> 무조건 2.05 & payload 에 allow 정보
static int handle_options_light(coap_rw_buffer_t *scratch, const coap_packet_t *inpkt, coap_packet_t *outpkt, uint8_t id_hi, uint8_t id_lo)
{
    printf("call Options: %s \n",allow);
    return coap_make_response(scratch, outpkt, allow, sizeof(allow), id_hi, id_lo, &inpkt->tok, COAP_RSPCODE_CONTENT, COAP_CONTENTTYPE_TEXT_PLAIN);
}

//TODO TRACE는 request 정보를 payload로 다 넣어 처리하면 끝 -> 무조건 2.05 & payload에 request 넣기.
static int handle_trace_light(coap_rw_buffer_t *scratch, const coap_packet_t *inpkt, coap_packet_t *outpkt, uint8_t id_hi, uint8_t id_lo)
{
	size_t payloadsize;
	uint8_t tracePayload [4096];
	int errcode = coap_build(tracePayload,&payloadsize, inpkt);
	if(!errcode){
		return coap_make_response(scratch, outpkt, tracePayload, payloadsize, id_hi, id_lo, &inpkt->tok, COAP_RSPCODE_CONTENT, COAP_CONTENTTYPE_TEXT_PLAIN);
	}
	printf("err: %d \n",errcode);
    return coap_make_response(scratch, outpkt, NULL, 0, inpkt->hdr.id[0], inpkt->hdr.id[1], &inpkt->tok, COAP_RSPCODE_NOT_FOUND, COAP_CONTENTTYPE_NONE);
}

/*
 * Light resource end
 */

//TODO 새로운 메서드를 처리하게끔 endpoint에 등록
const coap_endpoint_t endpoints[] =
{
    {COAP_METHOD_GET, handle_get_well_known_core, &path_well_known_core, "ct=40"},
    {COAP_METHOD_GET, handle_get_light, &path_light, "ct=0"},
    {COAP_METHOD_PUT, handle_put_light, &path_light, NULL},
    {COAP_METHOD_POST, handle_post_light, &path_light, NULL},
    {COAP_METHOD_DELETE, handle_delete_light, &path_light, NULL},
    {COAP_METHOD_HEAD, handle_head_light, &path_light, NULL},
    {COAP_METHOD_OPTIONS, handle_options_light, &path_light, NULL},
    {COAP_METHOD_TRACE, handle_trace_light, &path_light, NULL},
    {(coap_method_t)0, NULL, NULL, NULL}
};

void build_rsp(void)
{
    uint16_t len = rsplen;
    const coap_endpoint_t *ep = endpoints;
    int i;

    len--; // Null-terminated string

    while(NULL != ep->handler)
    {
        if (NULL == ep->core_attr) {
            ep++;
            continue;
        }

        if (0 < strlen(rsp)) {
            strncat(rsp, ",", len);
            len--;
        }

        strncat(rsp, "<", len);
        len--;

        for (i = 0; i < ep->path->count; i++) {
            strncat(rsp, "/", len);
            len--;

            strncat(rsp, ep->path->elems[i], len);
            len -= strlen(ep->path->elems[i]);
        }

        strncat(rsp, ">;", len);
        len -= 2;

        strncat(rsp, ep->core_attr, len);
        len -= strlen(ep->core_attr);

        ep++;
    }
}