//Funcion start
int start_server(const u_short port, const char baseDir[]) {
int serverSocket;
int clientSocket;
char clientIP[18];
u_int clientPort;
int forkID;
int localError;
serverSocket = newTCPServerSocket4("0.0.0.0",port,5);
if(serverSocket == -1) {
return 1;
}
while(true) {
bzero(clientIP,sizeof(clientIP));
clientPort = 0;
debug(1,"%s","Waiting for a Client...");
clientSocket = waitConnection4(serverSocket,clientIP,&clientPort);
if(clientSocket == -1) {
debug(1,"%s","ERROR: Invalid Client Socket");
continue;
}
debug(2,"Connected Client %s:%u",clientIP,clientPort);
forkID = fork();
if(forkID == 0) {
//Hilo para trabajar con el Cliente
start_protocol(clientSocket,baseDir);
closeTCPSocket(clientSocket);
debug(2,"Close connection (%s:%u)",clientIP,clientPort);
} else if(forkID > 0) {
//Hilo para trabajar con el Servidor
closeTCPSocket(clientSocket);
} else {
//Debug del fork.
localError = errno;
debug(0,"ERROR, Cant Fork for Client %s",strerror(localError));
return 1;
}
}
closeTCPSocket(serverSocket);
return 0;
}
int start_server(const char iface[], const u_short port, const u_short maxClients)
{
int serverSocket;
int clientSocket;
char clientIP[18];
u_int clientPort;
int forkID;
int localerror;
serverSocket = newTCPServerSocket4(iface,port,maxClients);
if(serverSocket == -1)
{
return 0;
}
while(1)
{
bzero(clientIP,sizeof(clientIP));
clientPort = 0;
debug(1,"%s","Waiting for a Client...");
clientSocket = waitConnection4(serverSocket,clientIP,&clientPort);
if(clientSocket == -1)
{
debug(1,"%s","ERROR: Invalid Client Socket");
continue;
}
debug(2,"Connected Client %s:%u",clientIP,clientPort);
forkID = fork();
if(forkID == 0)
{
start_protocol(clientSocket);
closeTCPSocket(clientSocket);
debug(2,"Close connection (%s:%u)",clientIP,clientPort);
}
else if(forkID > 0)
{
closeTCPSocket(clientSocket);
}
else
{
localerror = errno;
debug(0,"ERROR, Cant Fork for Client %s",strerror(localerror));
return 1;
}
}
closeTCPSocket(serverSocket);
return 1;
}
//Funcion start
int start_client(const u_short port, const char ip[], const char remoteFilename[], const char localFilename[]) {
int socket;
socket = newTCPClientSocket4(ip, port);
if(socket == -1) {
return 1;
}
start_protocol(socket,remoteFilename,localFilename);
closeTCPSocket(socket);
debug(2,"Close connection (%s:%u)",ip,port);
return 0;
}
//Funcion start
int start_client(const u_short port, const char ip[], const char remoteFilename[], const char localFilename[]) {
int socketf;
socketf = newTCPClientSocket4(ip, port);
int sockfd;
pid_t pid;
struct sockaddr_in servaddr;
//if (argc != 2) {
// puts("usage: cli <IPaddress>");
// exit(1);
//}
bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(6000);
inet_pton(AF_INET, "192.168.1.255", &servaddr.sin_addr);
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if ((pid = fork()) == 0) {
dg_cli(stdin, sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr));
exit(0);
}
if(socketf == -1) {
return 1;
}
start_protocol(socketf,remoteFilename,localFilename);
closeTCPSocket(socketf);
debug(2,"Close connection (%s:%u)",ip,port);
sleep(2);
return 0;
}
//Funcion start
int start_server(const u_short port, const char baseDir[]) {
int serverSocket;
int clientSocket;
char clientIP[18];
u_int clientPort;
int forkID;
int localError;
pid_t pid;
if ((pid = fork()) == 0) {
int sockfd;
struct sockaddr_in servaddr, cliaddr;
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
servaddr.sin_port = htons(PORT);
bind(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr));
dg_echo(sockfd, (struct sockaddr *) &cliaddr, sizeof(cliaddr));
exit(0);
}
serverSocket = newTCPServerSocket4("0.0.0.0", 5001, 5);
if(serverSocket == -1) {
return 1;
}
while(true) {
bzero(clientIP,sizeof(clientIP));
clientPort = 0;
debug(1,"%s","Waiting for a Client...");
clientSocket = waitConnection4(serverSocket,clientIP,&clientPort);
if(clientSocket == -1) {
debug(1,"%s","ERROR: Invalid Client Socket");
continue;
}
debug(2,"Connected Client %s:%u",clientIP,clientPort);
forkID = fork();
if(forkID == 0) {
//Hilo para trabajar con el Cliente
start_protocol(clientSocket,baseDir);
closeTCPSocket(clientSocket);
debug(2,"Close connection (%s:%u)",clientIP,clientPort);
} else if(forkID > 0) {
//Hilo para trabajar con el Servidor
closeTCPSocket(clientSocket);
} else {
//Debug del fork.
localError = errno;
debug(0,"ERROR, Cant Fork for Client %s",strerror(localError));
return 1;
}
}
closeTCPSocket(serverSocket);
return 0;
}
int main(int argc, char*argv[]) {
int ret; /* function returns */
int err; /* for error handle*/
int sk; /* server communication socket */
int cl_port; /* port number */
int session_key_len; /* len of session key: Kab' */
int filename_len; /* len of the name of file */
unsigned char * session_key; /* buffer for session key: Kab' */
char *cmd; /* command inserted by the client */
char *filename; /* Name of the inserted file */
struct sockaddr_in srv_addr; /* server address */
/* Command line arguments check */
if (argc!=4) {
printf ("Error inserting parameters. Usage: \n\t %s (IP) (port) (username)\n\n", argv[0]);
return 1;
}
/* Port number validity check */
if ( atoi(argv[2]) <= 0 || atoi(argv[2]) > 65535 ) {
printf ("Port number is not valid\n");
return 1;
}
cl_port = atoi(argv[2]);
memset(&srv_addr, 0, sizeof(srv_addr));
srv_addr.sin_family = AF_INET;
srv_addr.sin_port = htons(cl_port);
ret = inet_pton(AF_INET, argv[1], &srv_addr.sin_addr);
if(ret <= 0) {
printf("Wrong server address\n");
return 1;
}
/* New socket creation */
sk = socket(AF_INET, SOCK_STREAM, 0);
if(sk == -1) {
printf("Error creating the socket\n");
return 1;
}
/* TCP connection setup */
ret = connect(sk, (SA *) &srv_addr, sizeof(srv_addr));
if(ret == -1) {
printf("Error establishing a connection with the server\n");
return 1;
}
printf("Connection with server %s established on port %d.\n", argv[1], cl_port);
/* Let's call the start protocol function to establish the session key */
session_key = NULL;
err = start_protocol(sk, &session_key, &session_key_len, argv);
if(err < 0) {
printf("The protocol with the server was aborted.\n");
close(sk);
return -1;
}
/* till client dies, do... */
cmd = malloc(DIM_CMD);
while(1) {
/* Commands available */
printf("\nInsert the command:\n");
printf("1) Send file to server\t(Usage: 1 [file_name])\n");
printf("2) Retrieve a list of your current files\t(Usage: 2)\n");
printf("3) Download file from the server\t(Usage: 3 [file_name])\n");
printf("4) Remove file from the server\t(Usage: 4 [file_name])\n");
printf("5) Close connection to server\t(Usage: 5)\n\n");
printf("> ");
cmd = fgets(cmd, DIM_CMD, stdin);
if (cmd == NULL) {
perror("SETTING CLIENT ERROR - Function 'fgets' error");
printf("EXITING...\n");
close(sk);
break;
}
if (cmd[strlen(cmd)-1] != '\n')
flushStdIN; /* clears the input stream in case it has not been pressed 'send'. */
else
cmd[strlen(cmd)-1] = '\0'; /* otherwise it replaces the caratter f 'newline' with the end of string. */
if (!(atoi(&cmd[0]) == 1 || atoi(&cmd[0]) == 2 || atoi(&cmd[0]) == 3 ||atoi(&cmd[0]) == 4 || atoi(&cmd[0]) == 5 )) { /* verify the current command */
printf("\n\n");
continue;
}
switch (atoi(&cmd[0])) {
case 1: /* Command to send a file to server */
filename_len = strlen(cmd);
if (filename_len<=2) {
printf("Insert file name\n");
continue;
}
filename = malloc(filename_len + 1);
if(filename == NULL) {
printf("Error in allocating memory\n");
return -1;
}
strcpy(filename, cmd + 2);
/* Function that perform what requested */
if( send_file_crypt(filename, sk, session_key, session_key_len) < 0 )
printf("Error sending the file to the server.\n");
free(filename);
break;
case 2: /* Command to ask for a list of files contained */
if(ask_for_the_list(sk, session_key, session_key_len) < 0)
printf("Error asking the file list to the server.\n");
break;
case 3: /* Command to download a file from the server, if present */
filename_len = strlen(cmd);
if (filename_len<=2) {
printf("Insert file name\n");
continue;
}
filename = malloc(filename_len + 1);
if(filename == NULL) {
printf("Error in allocating memory\n");
return -1;
}
strcpy(filename, cmd + 2);
/* Function that perform what requested */
if( recv_file_crypt(filename, sk, session_key, session_key_len) < 0 )
printf("Error receiving the file from the server.\n");
free(filename);
break;
case 4: /* Command to remove a file from the server */
filename_len = strlen(cmd);
if (filename_len<=2) {
printf("Insert file name\n");
continue;
}
filename = malloc(filename_len + 1);
if(filename == NULL) {
printf("Error in allocating memory\n");
return -1;
}
strcpy(filename, cmd + 2);
/* Function that perform what requested */
if( rmv_file(filename, sk, session_key, session_key_len) < 0 )
printf("Error in deleting file from the server.\n");
free(filename);
break;
case 5: /* Command to disconnect the client */
printf("Exiting...\n");
free(cmd);
close(sk);
return 0;
default:
break;
}
}
free(cmd);
close(sk);
return 0;
}
