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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/gnrc/coap.h"
#include "od.h"
#include "fmt.h"
static void _resp_handler(unsigned req_state, coap_pkt_t* pdu);
static ssize_t _stats_handler(coap_pkt_t* pdu, uint8_t *buf, size_t len);
/* CoAP resources */
static const coap_resource_t _resources[] = {
{ "/cli/stats", COAP_GET, _stats_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)
{
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. Returns the count of packets sent by the
* CLI.
*/
static ssize_t _stats_handler(coap_pkt_t* pdu, uint8_t *buf, size_t len)
{
gcoap_resp_init(pdu, buf, len, COAP_CODE_CONTENT);
size_t payload_len = fmt_u16_dec((char *)pdu->payload, req_count);
return gcoap_finish(pdu, payload_len, COAP_FORMAT_TEXT);
}
static size_t _send(uint8_t *buf, size_t len, char *addr_str, char *port_str)
{
ipv6_addr_t addr;
uint16_t port;
size_t bytes_sent;
/* parse destination address */
if (ipv6_addr_from_str(&addr, addr_str) == NULL) {
puts("gcoap_cli: unable to parse destination address");
return 0;
}
/* parse port */
port = (uint16_t)atoi(port_str);
if (port == 0) {
puts("gcoap_cli: unable to parse destination port");
return 0;
}
bytes_sent = gcoap_req_send(buf, len, &addr, port, _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");
}
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(&open_reqs);
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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