67 lines
1.4 KiB
C
67 lines
1.4 KiB
C
/*
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* lw12.c
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* Copyright (C) 2017 jpk <jpk@dwarf>
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*
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* Distributed under terms of the MIT license.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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//#include <netdb.h>
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#include "lw12.h"
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int lw12_connect(int *sockfd, struct sockaddr_in *addr, uint16_t port,
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char *hostname) {
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if ((*sockfd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1) {
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perror("socket");
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exit(EXIT_FAILURE);
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}
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memset((char *)addr, 0, sizeof(struct sockaddr_in));
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addr->sin_family = AF_INET;
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addr->sin_port = htons(port);
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inet_aton(hostname, &addr->sin_addr);
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return *sockfd;
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}
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int lw12_sendcmd(int sockfd, struct sockaddr_in *addr, char *cmd) {
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const socklen_t slen = sizeof(struct sockaddr_in);
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if (sendto(sockfd, cmd, LW12_CMD_LENGTH, 0, (const struct sockaddr *)addr,
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slen) == -1) {
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perror("sendto");
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close(sockfd);
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exit(EXIT_FAILURE);
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}
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return 0;
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}
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int main() {
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int sockfd = 0;
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struct sockaddr_in server_addr;
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char serverip[] = "192.168.178.24";
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uint16_t serverport = 5000;
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lw12_connect(&sockfd, &server_addr, serverport, serverip);
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lw12_sendcmd(sockfd, &server_addr, (char *)LIGHTS_ON);
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usleep(2000000);
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lw12_sendcmd(sockfd, &server_addr, (char *)LIGHTS_OFF);
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close(sockfd);
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return 0;
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}
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