75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <sys/socket.h>
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#include <stdio.h>
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#include <unistd.h>
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int main()
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{
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printf("cpp_udp_socket_client_test():\n");
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ssize_t n_sent;
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int sock = -1;
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struct sockaddr_in server;
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char buf[64];
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if(sock == -1) {
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sock = socket(AF_INET , SOCK_DGRAM , 0);
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if (sock == -1) {
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printf("error creating socket\n");
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return 1;
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}
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}
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server.sin_addr.s_addr = inet_addr("10.5.5.47");
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server.sin_family = AF_INET;
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server.sin_port = htons(8888);
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//char *buf = "Welcome to the Machine\n";
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memcpy(buf, "Welcome to the Machine", sizeof("Welcome to the Machine"));
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printf("sizeof(buf) = %d\n", sizeof(buf));
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if (connect(sock , (struct sockaddr *)&server , sizeof(server)) < 0) {
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printf("api_test: error while connecting.\n");
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return 1;
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}
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// Repeatedly send UDP datagram
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char data[1024];
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memset(data, 0, sizeof(data));
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int count =0;
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while(1)
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{
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count++;
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usleep(1000);
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n_sent = send(sock,data,sizeof(data),0);
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if (n_sent < 0) {
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perror("Problem sending data");
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return 1;
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}
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if (n_sent != sizeof(buf))
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printf("sendto sent %d bytes\n",(int)n_sent);
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printf("n_sent = %d, count = %d\n", n_sent,count);
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}
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return 1;
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socklen_t recv_addr_len;
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// Clear address info for RX test
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server.sin_addr.s_addr = inet_addr("");
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server.sin_port = htons(-1);
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while (1) {
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n_sent=recvfrom(sock,buf,sizeof(buf),0,(struct sockaddr *)&server,&recv_addr_len);
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printf("Got a datagram from %s port %d\n", inet_ntoa(server.sin_addr), ntohs(server.sin_port));
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if (n_sent<0) {
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perror("Error receiving data");
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}
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else {
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printf("RXed: %s\n", buf);
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}
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}
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return 1;
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}
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