V1

Author: simonbeurel

Client/client

@@ -0,0 +1,93 @@
+#include <arpa/inet.h> // inet_addr()
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h> // bzero()
+#include <sys/socket.h>
+#include <unistd.h> // read(), write(), close()
+#define MAX 1024
+#define PORT 8080
+#define SA struct sockaddr
+
+void send_file(int sockfd, const char *filename) {
+    FILE *fp;
+    // Open the file for reading
+    fp = fopen(filename, "rb");
+    if (fp == NULL) {
+        printf("Error opening file for reading...\n");
+        return;
+    }
+    int n;
+    char data[MAX] = {0};
+
+    while(fgets(data, MAX, fp) != NULL) {
+        if (send(sockfd, data, sizeof(data), 0) == -1) {
+        perror("[-]Error in sending file.");
+        exit(1);
+        }
+        printf("Sent %d bytes to server : %s \n", n, data);
+        bzero(data, MAX);
+    }
+
+    printf("File sent successfully!\n");
+}
+
+
+
+void func(int sockfd)
+{
+    char buff[MAX];
+    int n;
+    for (;;) {
+        bzero(buff, sizeof(buff));
+        printf("Enter your command : ");
+        n = 0;
+        while ((buff[n++] = getchar()) != '\n')
+            ;
+        write(sockfd, buff, sizeof(buff));
+
+        // Check if the command is for uploading a file
+        if (strncmp("sectrans -up", buff, 12) == 0) {
+            // Extract filename from the command
+            char *filename = strtok(buff + 13, " \n");
+            send_file(sockfd, filename);
+        }
+    }
+}
+
+int main()
+{
+    int sockfd, connfd;
+    struct sockaddr_in servaddr, cli;
+
+    // socket create and verification
+    sockfd = socket(AF_INET, SOCK_STREAM, 0);
+    if (sockfd == -1) {
+        printf("socket creation failed...\n");
+        exit(0);
+    }
+    else
+        printf("Socket successfully created..\n");
+    bzero(&servaddr, sizeof(servaddr));
+
+    // assign IP, PORT
+    servaddr.sin_family = AF_INET;
+    servaddr.sin_addr.s_addr = inet_addr("127.0.0.1");
+    servaddr.sin_port = htons(PORT);
+
+    // connect the client socket to server socket
+    if (connect(sockfd, (SA*)&servaddr, sizeof(servaddr))
+        != 0) {
+        printf("connection with the server failed...\n");
+        exit(0);
+        }
+    else
+        printf("connected to the server..\n");
+
+    // function for chat
+    func(sockfd);
+
+    // close the socket
+    close(sockfd);
+}

Client/client.c

@@ -0,0 +1,2 @@
+/* send message (maximum size: 1024 bytes) */
+int sndmsg(char msg[1024], int port);

Client/client.h

@@ -0,0 +1 @@
+bonjour je m'appelle simon

Client/libclient.so

@@ -0,0 +1,128 @@
+#include <stdio.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h> // read(), write(), close()
+#define MAX 1024
+#define PORT 8080
+#define SA struct sockaddr
+
+int sockfd;
+
+int start_server(){
+	int connfd, len;
+	struct sockaddr_in servaddr, cli;
+	// socket create and verification
+	sockfd = socket(AF_INET, SOCK_STREAM, 0);
+	if (sockfd == -1) {
+		printf("socket creation failed...\n");
+		exit(0);
+	}
+	else
+		printf("Socket successfully created..\n");
+	bzero(&servaddr, sizeof(servaddr));
+
+	// assign IP, PORT
+	servaddr.sin_family = AF_INET;
+	servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
+	servaddr.sin_port = htons(PORT);
+
+	// Binding newly created socket to given IP and verification
+	if ((bind(sockfd, (SA*)&servaddr, sizeof(servaddr))) != 0) {
+		printf("socket bind failed...\n");
+		exit(0);
+	}
+	else
+		printf("Socket successfully binded..\n");
+
+	// Now server is ready to listen and verification
+	if ((listen(sockfd, 5)) != 0) {
+		printf("Listen failed...\n");
+		exit(0);
+	}
+	else
+		printf("Server listening..\n");
+	len = sizeof(cli);
+
+	// Accept the data packet from client and verification
+	connfd = accept(sockfd, (SA*)&cli, &len);
+	if (connfd < 0) {
+		printf("server accept failed...\n");
+		exit(0);
+	}
+	else
+		printf("server accept the client...\n");
+
+	return connfd;
+}
+
+
+void receive_file(int connfd, char *filename) {
+    char buff[MAX];
+    FILE *fp;
+    int n;
+	
+	printf("Receiving file...%s\n", filename);
+
+    // Open the file for writing
+    fp = fopen(filename, "wb");
+    if (fp == NULL) {
+        printf("Error opening file for writing...\n");
+        return;
+    }
+
+	while (1) {
+		n = recv(sockfd, buff, MAX, 0);
+		printf("received %d bytes to server : %s \n", n, buff);
+		if (n <= 0){
+		break;
+		return;
+		}
+		fprintf(fp, "%s", buff);
+		bzero(buff, MAX);
+	}
+	return;
+}
+
+
+// Function designed for chat between client and server.
+void func(int connfd)
+{
+	char buff[MAX];
+	int n;
+	// infinite loop for chat
+	for (;;) {
+		bzero(buff, MAX);
+
+		// read the message from client and copy it in buffer
+		read(connfd, buff, sizeof(buff));
+		// if msg contains "Exit" then server exit and chat ended.
+		if (strncmp("exit", buff, 4) == 0) {
+			printf("Server Exit...\n");
+			break;
+		} else if (strncmp("sectrans -list", buff, 14)==0){
+			printf("LIST....\n");
+			//Do something......
+		} else if (strncmp("sectrans -up", buff, 12) == 0) {
+            // Receive file from client
+			char *filename = strtok(buff + 13, " \n");
+            receive_file(connfd, filename);
+        }
+
+	}
+}
+
+// Driver function
+int main()
+{
+	int connfd = start_server();
+
+	// Function for chatting between client and server
+	func(connfd);
+
+	// After chatting close the socket
+	close(sockfd);
+}

Client/test.txt

@@ -0,0 +1,5 @@
+int startserver(int port);
+int stopserver();
+
+/* read message sent by client */
+int getmsg(char msg_read[1024]);