X-Git-Url: https://gapil.gnulinux.it/gitweb/?p=gapil.git;a=blobdiff_plain;f=sources%2FElemEchoTCPClient.c;fp=sources%2FElemEchoTCPClient.c;h=97eba1957a0db7b0a69a91d630392514128c8e43;hp=0000000000000000000000000000000000000000;hb=eeae53d349031efdb209921e45302ecfd4c29638;hpb=4ff5f41266fec476e9a8d2d2d2cf4c58f8bb5590

diff --git a/sources/ElemEchoTCPClient.c b/sources/ElemEchoTCPClient.c
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+++ b/sources/ElemEchoTCPClient.c
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+/****************************************************************
+ *
+ * Program SimpleEchoTCPClient: 
+ * Simple TCP client for echo service (port 7)
+ *
+ * Author: Simone Piccardi
+ * Jun. 2001
+ *
+ * Usage: echo -h give all info's
+ *
+ * $Id: ElemEchoTCPClient.c,v 1.1 2001/06/18 21:46:14 piccardi Exp $
+ *
+ ****************************************************************/
+/* 
+ * Include needed headers
+ */
+#include <sys/types.h>   /* predefined types */
+#include <unistd.h>      /* include unix standard library */
+#include <arpa/inet.h>   /* IP addresses conversion utiliites */
+#include <sys/socket.h>  /* socket library */
+#include <stdio.h>	 /* include standard I/O library */
+
+#include "wrappers.h"
+
+#define MAXLINE 256
+void usage(void);
+void EchoClient(FILE * filein, int socket);
+
+/* Program begin */
+int main(int argc, char *argv[])
+{
+/* 
+ * Variables definition  
+ */
+    int sock_fd, i;
+    struct sockaddr_in serv_add;
+    /*
+     * Input section: decode parameters passed in the calling 
+     * Use getopt function
+     */
+    opterr = 0;	 /* don't want writing to stderr */
+    while ( (i = getopt(argc, argv, "h")) != -1) {
+	switch (i) {
+	/* 
+	 * Handling options 
+	 */ 
+	case 'h':  
+	    printf("Wrong -h option use\n");
+	    usage();
+	    return(0);
+	    break;
+	case '?':   /* unrecognized options */
+	    printf("Unrecognized options -%c\n",optopt);
+	    usage();
+	default:    /* should not reached */
+	    usage();
+	}
+    }
+    /* ***********************************************************
+     * 
+     *		 Options processing completed
+     *
+     *		      Main code beginning
+     * 
+     * ***********************************************************/
+    /* create socket */
+    if ( (sock_fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+	perror("Socket creation error");
+	return -1;
+    }
+    /* initialize address */
+    memset((void *) &serv_add, 0, sizeof(serv_add)); /* clear server address */
+    serv_add.sin_family = AF_INET;                   /* address type is INET */
+    serv_add.sin_port = htons(7);                    /* echo port is 7 */
+    /* build address using inet_pton */
+    if ( (inet_pton(AF_INET, argv[optind], &serv_add.sin_addr)) <= 0) {
+	perror("Address creation error");
+	return -1;
+    }
+    /* extablish connection */
+    if (connect(sock_fd, (struct sockaddr *)&serv_add, sizeof(serv_add)) < 0) {
+	perror("Connection error");
+	return -1;
+    }
+    /* read daytime from server */
+    EchoClient(stdin, sock_fd);
+    /* normal exit */
+    return 0;
+}
+/*
+ * routine to print usage info and exit 
+ */
+void usage(void) {
+    printf("Take daytime from a remote host \n");
+    printf("Usage:\n");
+    printf("  daytime [-h] [-v] [host in dotted decimal form] \n");
+    printf("  -v	   set verbosity on\n");
+    printf("  -h	   print this help\n");
+    exit(1);
+}
+
+void EchoClient(FILE * filein, int socket) 
+{
+    char sendbuff[MAXLINE], recvbuff[MAXLINE];
+    int nread; 
+    while (fgets(sendbuff, MAXLINE, filein) != NULL) {
+	SockWrite(socket, sendbuff, strlen(sendbuff)); 
+	nread = SockRead(socket, recvbuff, strlen(sendbuff));
+	recvbuff[nread] = 0;
+	fputs(recvbuff, stdout);
+    }
+    return;
+}