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/*
* Copyright (C) 2015 Freie Universitรคt Berlin
*
* 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 Demonstrating the sending and receiving of UDP data over POSIX sockets.
*
* @author Martine Lenders <mlenders@inf.fu-berlin.de>
*
* @}
*/
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include "common.h"
#include "od.h"
#include "net/af.h"
#include "net/conn/udp.h"
#include "net/ipv6.h"
#include "thread.h"
#include "xtimer.h"
#ifdef MODULE_CONN_UDP
static char conn_inbuf[CONN_INBUF_SIZE];
static bool server_running;
static conn_udp_t server_conn;
static char server_stack[THREAD_STACKSIZE_DEFAULT];
static msg_t server_msg_queue[SERVER_MSG_QUEUE_SIZE];
static void *_server_thread(void *args)
{
ipv6_addr_t server_addr = IPV6_ADDR_UNSPECIFIED;
uint16_t port;
int res;
msg_init_queue(server_msg_queue, SERVER_MSG_QUEUE_SIZE);
/* parse port */
port = (uint16_t)atoi((char *)args);
if ((res = conn_udp_create(&server_conn, &server_addr,
sizeof(server_addr), AF_INET6, port)) < 0) {
printf("Unable to open UDP server on port %" PRIu16 " (error code %d)\n",
port, -res);
return NULL;
}
server_running = true;
printf("Success: started UDP server on port %" PRIu16 "\n", port);
while (1) {
int res;
ipv6_addr_t src;
size_t src_len = sizeof(ipv6_addr_t);
uint16_t sport;
if ((res = conn_udp_recvfrom(&server_conn, conn_inbuf, sizeof(conn_inbuf), &src,
&src_len, &sport)) < 0) {
puts("Error on receive");
}
else if (res == 0) {
puts("No data received");
}
else {
char addrstr[IPV6_ADDR_MAX_STR_LEN];
printf("Received from [%s]:%" PRIu16 ":\n", ipv6_addr_to_str(addrstr, &src,
sizeof(addrstr)), sport);
od_hex_dump(conn_inbuf, res, 0);
}
}
return NULL;
}
static int udp_send(char *addr_str, char *port_str, char *data, unsigned int num,
unsigned int delay)
{
ipv6_addr_t src = IPV6_ADDR_UNSPECIFIED, dst;
uint16_t port;
uint8_t byte_data[strlen(data) / 2];
size_t data_len;
/* parse destination address */
if (ipv6_addr_from_str(&dst, addr_str) == NULL) {
puts("Error: unable to parse destination address");
return 1;
}
/* parse port */
port = (uint16_t)atoi(port_str);
data_len = hex2ints(byte_data, data);
for (unsigned int i = 0; i < num; i++) {
if (conn_udp_sendto(byte_data, data_len, &src, sizeof(src), (struct sockaddr *)&dst,
sizeof(dst), AF_INET6, port, port) < 0) {
puts("could not send");
}
else {
printf("Success: send %u byte to [%s]:%" PRIu16 ")\n",
(unsigned)data_len, addr_str, port);
}
xtimer_usleep(delay);
}
return 0;
}
static int udp_start_server(char *port_str)
{
if (thread_create(server_stack, sizeof(server_stack), THREAD_PRIORITY_MAIN - 1,
THREAD_CREATE_STACKTEST, _server_thread, port_str,
"UDP server") <= KERNEL_PID_UNDEF) {
return 1;
}
return 0;
}
int udp_cmd(int argc, char **argv)
{
if (argc < 2) {
printf("usage: %s [send|server]\n", argv[0]);
return 1;
}
if (strcmp(argv[1], "send") == 0) {
uint32_t num = 1;
uint32_t delay = 1000000;
if (argc < 5) {
printf("usage: %s send <addr> <port> <hex data> [<num> [<delay in us>]]\n",
argv[0]);
return 1;
}
if (argc > 5) {
num = (uint32_t)atoi(argv[5]);
}
if (argc > 6) {
delay = (uint32_t)atoi(argv[6]);
}
return udp_send(argv[2], argv[3], argv[4], num, delay);
}
else if (strcmp(argv[1], "server") == 0) {
if (argc < 3) {
printf("usage: %s server [start|stop]\n", argv[0]);
return 1;
}
if (strcmp(argv[2], "start") == 0) {
if (argc < 4) {
printf("usage %s server start <port>\n", argv[0]);
return 1;
}
return udp_start_server(argv[3]);
}
else {
puts("error: invalid command");
return 1;
}
}
else {
puts("error: invalid command");
return 1;
}
}
#else
typedef int dont_be_pedantic;
#endif
/** @} */
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