202 lines
6.6 KiB
C
202 lines
6.6 KiB
C
/****************************************************************************
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* apps/examples/tcp_ipc_client/tcp_ipc_client_main.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/* This program consists of a client socket & custom messages that send
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* data (hex-string formatted data) to a server (server_tcp). Then,
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* server_tcp send this data over LoraWAN (using Radioenge LoRaWAn module)
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* Both client and server work on local network.
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* IMPORTANT NOTE:
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* In order to test client_tcp & server_tcp together, there are two
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* ways to proceed:
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* 1) Init server manually (command: SERVER &), and after successfull
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* server init, also init client manually (CLIENT 127.0.0.1)
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* 2) Init server automatically after boot using NuttShell start up scripts.
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*/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include <arpa/inet.h>
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#include "protocol.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static void show_usage(FAR const char *progname)
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{
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fprintf(stderr, "USAGE: %s <Server-IP>\n", progname);
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fprintf(stderr, " %s -h\n", progname);
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fprintf(stderr, "Where:\n");
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fprintf(stderr, "\t<<Server-IP>: IP of server TCP/IP socket for IPC.\n");
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Definitions
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****************************************************************************/
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#define SOCKET_PORT 5000
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#define TCP_DATA_RCV_WITHOUT_FLAGS 0
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#define RCV_BUFFER_SIZE 520
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#define SEND_BUFFER_SIZE 500
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#define TIME_SECONDS_TO_SEND_NEXT_DATA 15
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/****************************************************************************
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* Client_tcp_main
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****************************************************************************/
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int main(int argc, char *argv[])
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{
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int socket_client = 0;
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char rcv_buffer[RCV_BUFFER_SIZE];
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char buffer_to_send[SEND_BUFFER_SIZE];
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int bytes_read_from_server = 0;
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struct sockaddr_in serv_addr;
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protocolo_ipc tprotocol;
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int ndx;
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/* Check if there are sufficient arguments passed to this program */
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if (argc != 2)
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{
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printf("\nNot enough parameters: %s.\n", argv[0]);
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return 1;
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}
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ndx = 1;
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if (strcmp(argv[1], "-h") == 0)
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{
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show_usage(argv[0]);
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return EXIT_FAILURE;
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}
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/* Create client socket */
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memset(rcv_buffer, 0x00, sizeof(rcv_buffer));
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socket_client = socket(AF_INET, SOCK_STREAM, 0);
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if (socket_client < 0)
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{
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perror("Failed to create client socket");
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exit(EXIT_FAILURE);
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}
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/* Connect to server socket */
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memset(&serv_addr, 0x00, sizeof(serv_addr));
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serv_addr.sin_family = AF_INET;
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serv_addr.sin_port = htons(SOCKET_PORT);
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if (inet_pton(AF_INET, argv[1], &serv_addr.sin_addr) <= 0)
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{
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perror("Failed when executing inet_pton()");
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exit(EXIT_FAILURE);
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}
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if (connect(socket_client, (struct sockaddr *)&serv_addr,
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sizeof(serv_addr)) < 0)
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{
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perror("Failed to connect to server socket");
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exit(EXIT_FAILURE);
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}
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/* Countinuosly send server data to be forwarded to LPWAN transceiver */
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while (1)
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{
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/* Formats message to be sent to server (opcode, message size
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* and message content)
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*/
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tprotocol.opcode = 'U';
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tprotocol.msg_size = 4;
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snprintf((char *)tprotocol.msg, sizeof(tprotocol.msg), "0102");
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/* Send message to server */
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memcpy(buffer_to_send, (unsigned char *)&tprotocol,
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sizeof(protocolo_ipc));
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write(socket_client, buffer_to_send, strlen(buffer_to_send));
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printf("Message sent to server!\n\n");
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/* Waits for server response */
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bytes_read_from_server = recv(socket_client, rcv_buffer,
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sizeof(protocolo_ipc),
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TCP_DATA_RCV_WITHOUT_FLAGS);
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if (bytes_read_from_server < 0)
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{
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perror("Failed to get server response");
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exit(EXIT_FAILURE);
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}
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else
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{
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/* Server response successfully received. Print it on the screen */
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memcpy((unsigned char *)&tprotocol, rcv_buffer,
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sizeof(protocolo_ipc));
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printf("Protocol: opcode: %c\n", tprotocol.opcode);
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printf("Protocol: message size: %d\n", tprotocol.msg_size);
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printf("Protocol: message: %s\n", tprotocol.msg);
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}
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/* Wait to send again */
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sleep(TIME_SECONDS_TO_SEND_NEXT_DATA);
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}
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return 0;
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}
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