updated test clients/servers
This commit is contained in:
Joseph Henry
@@ -49,17 +49,19 @@ int main(int argc , char *argv[])
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// RX
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int msglen = 1024;
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unsigned long count = 0;
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while(1)
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{
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count++;
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int bytes_read = read(client_sock, client_message, msglen);
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printf("RX = (%d): ", bytes_read);
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printf("[%lu] RX = (%d): ", count, bytes_read);
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for(int i=0; i<bytes_read; i++) {
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printf("%c", client_message[i]);
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}
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// TX
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int bytes_written = write(client_sock, "Server here!", msglen);
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printf("\nTX = %d\n", bytes_written);
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int bytes_written = write(client_sock, "Server here!", 12);
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printf("\t\nTX = %d\n", bytes_written);
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}
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return 0;
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}
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@@ -1,79 +1,92 @@
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// UDP Client test program
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#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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#include <string.h>
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int atoi(const char *str);
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int main(int argc, char * argv[])
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{
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if(argc < 3) {
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printf("usage: udp_client <addr> <port>\n");
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return 0;
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}
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int sock = -1, port = atoi(argv[1]);
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ssize_t n_sent;
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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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return 1;
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}
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}
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// Construct address
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server.sin_addr.s_addr = inet_addr(argv[1]);
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server.sin_family = AF_INET;
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server.sin_port = htons(port);
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// Connect to server
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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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// TX
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char *msg = "Welcome to the Machine";
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int count = 0;
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while(1) {
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count++;
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usleep(1000000);
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n_sent = send(sock,msg,sizeof(msg),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(msg))
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printf("sendto sent %d bytes\n",(int)n_sent);
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printf("n_sent = %ld, count = %d\n", n_sent,count);
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}
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// RX from server
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/*
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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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/*
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* udpclient.c - A simple UDP client
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* usage: udpclient <host> <port>
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*/
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return 1;
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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 <unistd.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#include <fcntl.h>
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#define BUFSIZE 1024
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/*
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* error - wrapper for perror
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*/
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void error(char *msg) {
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perror(msg);
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exit(0);
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}
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int main(int argc, char **argv) {
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int sockfd, portno, n;
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int serverlen;
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struct sockaddr_in serveraddr;
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struct hostent *server;
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char *hostname;
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char buf[BUFSIZE];
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/* check command line arguments */
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if (argc != 3) {
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fprintf(stderr,"usage: %s <hostname> <port>\n", argv[0]);
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exit(0);
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}
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hostname = argv[1];
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portno = atoi(argv[2]);
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/* socket: create the socket */
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sockfd = socket(AF_INET, SOCK_DGRAM, 0);
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if (sockfd < 0)
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error("ERROR opening socket");
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/* gethostbyname: get the server's DNS entry */
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server = gethostbyname(hostname);
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if (server == NULL) {
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fprintf(stderr,"ERROR, no such host as %s\n", hostname);
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exit(0);
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}
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/* build the server's Internet address */
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bzero((char *) &serveraddr, sizeof(serveraddr));
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serveraddr.sin_family = AF_INET;
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bcopy((char *)server->h_addr,
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(char *)&serveraddr.sin_addr.s_addr, server->h_length);
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serveraddr.sin_port = htons(portno);
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/* get a message from the user */
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char *msg = "A message to the server!\0";
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fcntl(sockfd, F_SETFL, O_NONBLOCK);
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long count = 0;
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while(1)
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{
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count++;
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printf("\nTX(%lu)...\n", count);
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usleep(100000);
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//bzero(buf, BUFSIZE);
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//printf("\nPlease enter msg: ");
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//fgets(buf, BUFSIZE, stdin);
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/* send the message to the server */
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serverlen = sizeof(serveraddr);
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printf("A\n");
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n = sendto(sockfd, msg, strlen(msg), 0, &serveraddr, serverlen);
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printf("B\n");
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//if (n < 0)
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// error("ERROR in sendto");
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/* print the server's reply */
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printf("C\n");
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memset(buf, 0, sizeof(buf));
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printf("D\n");
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n = recvfrom(sockfd, buf, BUFSIZE, 0, &serveraddr, &serverlen);
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printf("E\n");
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//if (n < 0)
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// printf("ERROR in recvfrom: %d", n);
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printf("Echo from server: %s", buf);
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}
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return 0;
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}
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