a752c7ab
 elopes
add first test an...
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/*
* Copyright (c) 2015-2016 Ken Bannister. All rights reserved.
*
* 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 examples
* @{
*
* @file
* @brief gcoap CLI support
*
* @author Ken Bannister <kb2ma@runbox.com>
*
* @}
*/
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "net/gcoap.h"
#include "od.h"
#include "fmt.h"
#define ENABLE_DEBUG (0)
#include "debug.h"
static void _resp_handler(unsigned req_state, coap_pkt_t* pdu,
sock_udp_ep_t *remote);
static ssize_t _stats_handler(coap_pkt_t* pdu, uint8_t *buf, size_t len);
static ssize_t _riot_board_handler(coap_pkt_t* pdu, uint8_t *buf, size_t len);
/* CoAP resources */
static const coap_resource_t _resources[] = {
{ "/cli/stats", COAP_GET | COAP_PUT, _stats_handler },
{ "/riot/board", COAP_GET, _riot_board_handler },
};
static gcoap_listener_t _listener = {
(coap_resource_t *)&_resources[0],
sizeof(_resources) / sizeof(_resources[0]),
NULL
};
/* Counts requests sent by CLI. */
static uint16_t req_count = 0;
/*
* Response callback.
*/
static void _resp_handler(unsigned req_state, coap_pkt_t* pdu,
sock_udp_ep_t *remote)
{
(void)remote; /* not interested in the source currently */
if (req_state == GCOAP_MEMO_TIMEOUT) {
printf("gcoap: timeout for msg ID %02u\n", coap_get_id(pdu));
return;
}
else if (req_state == GCOAP_MEMO_ERR) {
printf("gcoap: error in response\n");
return;
}
char *class_str = (coap_get_code_class(pdu) == COAP_CLASS_SUCCESS)
? "Success" : "Error";
printf("gcoap: response %s, code %1u.%02u", class_str,
coap_get_code_class(pdu),
coap_get_code_detail(pdu));
if (pdu->payload_len) {
if (pdu->content_type == COAP_FORMAT_TEXT
|| pdu->content_type == COAP_FORMAT_LINK
|| coap_get_code_class(pdu) == COAP_CLASS_CLIENT_FAILURE
|| coap_get_code_class(pdu) == COAP_CLASS_SERVER_FAILURE) {
/* Expecting diagnostic payload in failure cases */
printf(", %u bytes\n%.*s\n", pdu->payload_len, pdu->payload_len,
(char *)pdu->payload);
}
else {
printf(", %u bytes\n", pdu->payload_len);
od_hex_dump(pdu->payload, pdu->payload_len, OD_WIDTH_DEFAULT);
}
}
else {
printf(", empty payload\n");
}
}
/*
* Server callback for /cli/stats. Accepts either a GET or a PUT.
*
* GET: Returns the count of packets sent by the CLI.
* PUT: Updates the count of packets. Rejects an obviously bad request, but
* allows any two byte value for example purposes. Semantically, the only
* valid action is to set the value to 0.
*/
static ssize_t _stats_handler(coap_pkt_t* pdu, uint8_t *buf, size_t len)
{
/* read coap method type in packet */
unsigned method_flag = coap_method2flag(coap_get_code_detail(pdu));
switch(method_flag) {
case COAP_GET:
gcoap_resp_init(pdu, buf, len, COAP_CODE_CONTENT);
/* write the response buffer with the request count value */
size_t payload_len = fmt_u16_dec((char *)pdu->payload, req_count);
return gcoap_finish(pdu, payload_len, COAP_FORMAT_TEXT);
case COAP_PUT:
/* convert the payload to an integer and update the internal
value */
if (pdu->payload_len <= 5) {
char payload[6] = { 0 };
memcpy(payload, (char *)pdu->payload, pdu->payload_len);
req_count = (uint16_t)strtoul(payload, NULL, 10);
return gcoap_response(pdu, buf, len, COAP_CODE_CHANGED);
}
else {
return gcoap_response(pdu, buf, len, COAP_CODE_BAD_REQUEST);
}
}
return 0;
}
static ssize_t _riot_board_handler(coap_pkt_t *pdu, uint8_t *buf, size_t len)
{
gcoap_resp_init(pdu, buf, len, COAP_CODE_CONTENT);
/* write the RIOT board name in the response buffer */
memcpy(pdu->payload, RIOT_BOARD, strlen(RIOT_BOARD));
return gcoap_finish(pdu, strlen(RIOT_BOARD), COAP_FORMAT_TEXT);
}
static size_t _send(uint8_t *buf, size_t len, char *addr_str, char *port_str)
{
ipv6_addr_t addr;
size_t bytes_sent;
sock_udp_ep_t remote;
remote.family = AF_INET6;
remote.netif = SOCK_ADDR_ANY_NETIF;
/* parse destination address */
if (ipv6_addr_from_str(&addr, addr_str) == NULL) {
puts("gcoap_cli: unable to parse destination address");
return 0;
}
memcpy(&remote.addr.ipv6[0], &addr.u8[0], sizeof(addr.u8));
/* parse port */
remote.port = atoi(port_str);
if (remote.port == 0) {
puts("gcoap_cli: unable to parse destination port");
return 0;
}
bytes_sent = gcoap_req_send2(buf, len, &remote, _resp_handler);
if (bytes_sent > 0) {
req_count++;
}
return bytes_sent;
}
int gcoap_cli_cmd(int argc, char **argv)
{
/* Ordered like the RFC method code numbers, but off by 1. GET is code 0. */
char *method_codes[] = {"get", "post", "put"};
uint8_t buf[GCOAP_PDU_BUF_SIZE];
coap_pkt_t pdu;
size_t len;
if (argc == 1) {
/* show help for main commands */
goto end;
}
for (size_t i = 0; i < sizeof(method_codes) / sizeof(char*); i++) {
if (strcmp(argv[1], method_codes[i]) == 0) {
if (argc == 5 || argc == 6) {
if (argc == 6) {
gcoap_req_init(&pdu, &buf[0], GCOAP_PDU_BUF_SIZE, i+1, argv[4]);
memcpy(pdu.payload, argv[5], strlen(argv[5]));
len = gcoap_finish(&pdu, strlen(argv[5]), COAP_FORMAT_TEXT);
}
else {
len = gcoap_request(&pdu, &buf[0], GCOAP_PDU_BUF_SIZE, i+1,
argv[4]);
}
printf("gcoap_cli: sending msg ID %u, %u bytes\n", coap_get_id(&pdu),
(unsigned) len);
if (!_send(&buf[0], len, argv[2], argv[3])) {
puts("gcoap_cli: msg send failed");
}
else {
/* send Observe notification for /cli/stats */
switch (gcoap_obs_init(&pdu, &buf[0], GCOAP_PDU_BUF_SIZE,
&_resources[0])) {
case GCOAP_OBS_INIT_OK:
DEBUG("gcoap_cli: creating /cli/stats notification\n");
size_t payload_len = fmt_u16_dec((char *)pdu.payload, req_count);
len = gcoap_finish(&pdu, payload_len, COAP_FORMAT_TEXT);
gcoap_obs_send(&buf[0], len, &_resources[0]);
break;
case GCOAP_OBS_INIT_UNUSED:
DEBUG("gcoap_cli: no observer for /cli/stats\n");
break;
case GCOAP_OBS_INIT_ERR:
DEBUG("gcoap_cli: error initializing /cli/stats notification\n");
break;
}
}
return 0;
}
else {
printf("usage: %s <get|post|put> <addr> <port> <path> [data]\n",
argv[0]);
return 1;
}
}
}
if (strcmp(argv[1], "info") == 0) {
if (argc == 2) {
uint8_t open_reqs = gcoap_op_state();
printf("CoAP server is listening on port %u\n", GCOAP_PORT);
printf(" CLI requests sent: %u\n", req_count);
printf("CoAP open requests: %u\n", open_reqs);
return 0;
}
}
end:
printf("usage: %s <get|post|put|info>\n", argv[0]);
return 1;
}
void gcoap_cli_init(void)
{
gcoap_register_listener(&_listener);
}
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