From 6eb2e2d9274c4350324200e9bd6a92906c0fd2d0 Mon Sep 17 00:00:00 2001
From: 20050114 <20050114@studenti.uniupo.it>
Date: Fri, 17 May 2024 09:59:37 +0200
Subject: [PATCH] fix
---
.../Assigment4/EchoServer/client.c | 75 +++++++++++
.../Assigment4/EchoServer/makefile | 10 ++
.../Assigment4/EchoServer/server.c | 125 ++++++++++++++++++
3 files changed, 210 insertions(+)
create mode 100644 Reti/Laboratorio/Assigment4/EchoServer/client.c
create mode 100644 Reti/Laboratorio/Assigment4/EchoServer/makefile
create mode 100644 Reti/Laboratorio/Assigment4/EchoServer/server.c
diff --git a/Reti/Laboratorio/Assigment4/EchoServer/client.c b/Reti/Laboratorio/Assigment4/EchoServer/client.c
new file mode 100644
index 0000000..c62a176
--- /dev/null
+++ b/Reti/Laboratorio/Assigment4/EchoServer/client.c
@@ -0,0 +1,75 @@
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+int main(int argc, char *argv[]) {
+ char valueToSend[256] = {'\0'};
+ char valueToReceive[256] = {'\0'};
+ printf("-1 per uscire\n");
+ while (valueToSend[0] != '-' && valueToSend[1] != '1') {
+
+ int simpleSocket = 0;
+ int simplePort = 0;
+ int returnStatus = 0;
+ char buffer[256] = "";
+ struct sockaddr_in simpleServer;
+
+ if (argc != 3) {
+ fprintf(stderr, "Usage: %s <server> <port>\n", argv[0]);
+ exit(1);
+ }
+
+ /* create a streaming socket */
+ simpleSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+
+ if (simpleSocket == -1) {
+ fprintf(stderr, "Could not create a socket!\n");
+ exit(1);
+ } else {
+ fprintf(stderr, "Socket created!\n");
+ }
+
+ /* retrieve the port number for connecting */
+ simplePort = atoi(argv[2]);
+
+ /* setup the address structure */
+ /* use the IP address sent as an argument for the server address */
+ // bzero(&simpleServer, sizeof(simpleServer));
+ memset(&simpleServer, '\0', sizeof(simpleServer));
+ simpleServer.sin_family = AF_INET;
+ // inet_addr(argv[2], &simpleServer.sin_addr.s_addr);
+ simpleServer.sin_addr.s_addr = inet_addr(argv[1]);
+ simpleServer.sin_port = htons(simplePort);
+
+ /* connect to the address and port with our socket */
+ returnStatus = connect(simpleSocket, (struct sockaddr *)&simpleServer,
+ sizeof(simpleServer));
+
+ if (returnStatus == 0) {
+ fprintf(stderr, "Connect successful!\n");
+ } else {
+ fprintf(stderr, "Could not connect to address!\n");
+ close(simpleSocket);
+ exit(1);
+ }
+
+ /* get the message from the server */
+ // returnStatus = read(simpleSocket, buffer, sizeof(buffer));
+
+ printf("Inserire il valore da voler inviare al server: ");
+ scanf("%s", valueToSend);
+ write(simpleSocket, valueToSend, strlen(valueToSend));
+ read(simpleSocket, valueToReceive, sizeof(valueToReceive));
+ printf("\n\nEcho: %s\n", valueToReceive);
+ close(simpleSocket);
+ memset(valueToReceive, 0, sizeof(valueToReceive));
+ memset(valueToSend, 0, sizeof(valueToSend));
+ }
+
+ return 0;
+}
diff --git a/Reti/Laboratorio/Assigment4/EchoServer/makefile b/Reti/Laboratorio/Assigment4/EchoServer/makefile
new file mode 100644
index 0000000..f0ddf27
--- /dev/null
+++ b/Reti/Laboratorio/Assigment4/EchoServer/makefile
@@ -0,0 +1,10 @@
+all: client server
+
+client: client.c
+ gcc client.c -o client
+
+server: server.c
+ gcc server.c -o server
+
+clean:
+ rm -f client server
diff --git a/Reti/Laboratorio/Assigment4/EchoServer/server.c b/Reti/Laboratorio/Assigment4/EchoServer/server.c
new file mode 100644
index 0000000..bb20060
--- /dev/null
+++ b/Reti/Laboratorio/Assigment4/EchoServer/server.c
@@ -0,0 +1,125 @@
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+
+// const char MESSAGE[] = "Guess who's back!\n";
+
+int main(int argc, char *argv[])
+{
+
+ time_t ticks = time(NULL);
+ char MESSAGE[28] = {'\0'};
+ snprintf(MESSAGE, sizeof(MESSAGE), "%.24s\r\n", ctime(&ticks));
+
+ int simpleSocket = 0;
+ int simplePort = 0;
+ int returnStatus = 0;
+ struct sockaddr_in simpleServer;
+
+ if (argc < 1 || argc > 2)
+ {
+ fprintf(stderr, "Usage: %s <port>\n", argv[0]);
+ exit(1);
+ }
+
+ simpleSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+
+ if (simpleSocket == -1)
+ {
+
+ fprintf(stderr, "Could not create a socket!\n");
+ exit(1);
+ }
+ else
+ {
+ fprintf(stderr, "Socket created!\n");
+ }
+
+ /* retrieve the port number for listening */
+ if (argc == 2)
+ {
+ simplePort = atoi(argv[1]);
+ if (simplePort < 10000 || simplePort > 12000)
+ {
+ fprintf(stderr, "Port must be in range [10000, 12000]\n");
+ exit(1);
+ }
+ }
+ else
+ {
+ srand(time(NULL));
+ simplePort = (rand() % 1999) + 10000;
+ }
+
+ /* setup the address structure */
+ /* use INADDR_ANY to bind to all local addresses */
+ memset(&simpleServer, '\0', sizeof(simpleServer));
+ simpleServer.sin_family = AF_INET;
+ simpleServer.sin_addr.s_addr = htonl(INADDR_ANY);
+ simpleServer.sin_port = htons(simplePort);
+
+ /* bind to the address and port with our socket */
+ returnStatus = bind(simpleSocket, (struct sockaddr *)&simpleServer,
+ sizeof(simpleServer));
+
+ if (returnStatus == 0)
+ {
+ fprintf(stderr, "Bind completed on port %d!\n", simplePort);
+ }
+ else
+ {
+ fprintf(stderr, "Could not bind to address!\n");
+ close(simpleSocket);
+ exit(1);
+ }
+
+ /* lets listen on the socket for connections */
+ returnStatus = listen(simpleSocket, 5);
+
+ if (returnStatus == -1)
+ {
+ fprintf(stderr, "Cannot listen on socket!\n");
+ close(simpleSocket);
+ exit(1);
+ }
+
+ while (1)
+ {
+ struct sockaddr_in clientName = {0};
+ int simpleChildSocket = 0;
+ int clientNameLength = sizeof(clientName);
+
+ /* wait here */
+
+ simpleChildSocket =
+ accept(simpleSocket, (struct sockaddr *)&clientName, &clientNameLength);
+
+ if (simpleChildSocket == -1)
+ {
+ fprintf(stderr, "Cannot accept connections!\n");
+ close(simpleSocket);
+ exit(1);
+ }
+
+ /* handle the new connection request */
+ /* write out our message to the client */
+
+ // Read message from client
+ char bufferRead[256] = {'\0'};
+ printf("%zu\n\n", read(simpleChildSocket, bufferRead, sizeof(bufferRead)));
+ printf("Received: %s\n", bufferRead);
+ char valueToSend[256] = {'\0'};
+ snprintf(valueToSend, sizeof(valueToSend), "%s", bufferRead);
+ write(simpleChildSocket, valueToSend, sizeof(valueToSend));
+
+ close(simpleChildSocket);
+ }
+
+ close(simpleSocket);
+ return 0;
+}
--
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