From 9b316c16855b494012c49ee1f6ec6d435ae148cd Mon Sep 17 00:00:00 2001 From: Simone Piccardi Date: Mon, 23 Jun 2003 13:58:36 +0000 Subject: [PATCH] Nuova versione del client --- elemtcp.tex | 2 + sources/Makefile | 2 +- sources/TCP_echo.c | 145 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 148 insertions(+), 1 deletion(-) create mode 100644 sources/TCP_echo.c diff --git a/elemtcp.tex b/elemtcp.tex index c2a9dbb..70caf59 100644 --- a/elemtcp.tex +++ b/elemtcp.tex @@ -2175,6 +2175,8 @@ chiusura. + + %%% Local Variables: %%% mode: latex %%% TeX-master: "gapil" diff --git a/sources/Makefile b/sources/Makefile index 593d958..39db81d 100644 --- a/sources/Makefile +++ b/sources/Makefile @@ -66,7 +66,7 @@ forktest: ForkTest.c errcode: ErrCode.c $(CC) $(CFLAGJ) $^ -o $@ -echo: TCP_echo_first.c +echo: TCP_echo.c $(CC) $(CFLAGJ) $(CFLAGS) $^ -o $@ echod: TCP_echod.c diff --git a/sources/TCP_echo.c b/sources/TCP_echo.c new file mode 100644 index 0000000..be6842b --- /dev/null +++ b/sources/TCP_echo.c @@ -0,0 +1,145 @@ +/* TCP_echo1.c + * + * Copyright (C) 2001-2003 Simone Piccardi + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ +/**************************************************************** + * + * Program ElemEchoTCPClient.c + * Simple TCP client for echo service (port 7) + * + * Author: Simone Piccardi + * Jun. 2001 + * + * Usage: echo -h give all info's + * + * $Id: TCP_echo.c,v 1.1 2003/06/23 13:58:36 piccardi Exp $ + * + ****************************************************************/ +/* + * Include needed headers + */ +#include /* predefined types */ +#include /* include unix standard library */ +#include /* IP addresses conversion utiliites */ +#include /* socket library */ +#include /* include standard I/O library */ + +#define MAXLINE 256 +void usage(void); +void ClientEcho(FILE * filein, int socket); +void SigTERM_hand(int sig); + +/* Program begin */ +int main(int argc, char *argv[]) +{ +/* + * Variables definition + */ + int sock, i; + int reset = 0; + struct sockaddr_in serv_add; + struct linger ling; + /* + * Input section: decode parameters passed in the calling + * Use getopt function + */ + opterr = 0; /* don't want writing to stderr */ + while ( (i = getopt(argc, argv, "hr")) != -1) { + switch (i) { + /* + * Handling options + */ + case 'h': + printf("Wrong -h option use\n"); + usage(); + return(1); + break; + case 'r': + reset = 1; + 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 = 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, (struct sockaddr *)&serv_add, sizeof(serv_add)) < 0) { + perror("Connection error"); + return 1; + } + /* check if resetting on close is required */ + if (reset) { + ling.l_onoff = 1; + ling.l_linger = 0; + if (setsockopt(sock, SOL_SOCKET, SO_LINGER, &ling, sizeof(ling))) { + perror("Cannot set linger"); + exit(1); + } + } + /* read daytime from server */ + ClientEcho(stdin, sock); + /* 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(" -r require reset on closing\n"); + printf(" -h print this help\n"); + exit(1); +} + +void ClientEcho(FILE * filein, int socket) +{ + char sendbuff[MAXLINE+1], recvbuff[MAXLINE+1]; + int nread; + while (fgets(sendbuff, MAXLINE, filein) != NULL) { + FullWrite(socket, sendbuff, strlen(sendbuff)); + nread = FullRead(socket, recvbuff, strlen(sendbuff)); + recvbuff[nread] = 0; + fputs(recvbuff, stdout); + } + return; +} -- 2.30.2