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Chat_NT117
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Correcting.

master
Nick_Kramer 2023-02-16 23:33:16 -04:00
parent 4fb1542b48
commit 99decfc7e9
2 changed files with 280 additions and 109 deletions
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310
client_NT117.c
View File

@ -11,7 +11,7 @@
#define LENGTH 2048
// Global variables
// Global variables.
volatile sig_atomic_t flag = 0;
int sockfd = 0;
char name[32];
@ -40,6 +40,29 @@ void catch_ctrl_c_and_exit(int sig)
flag = 1;
}
// Simple crypt function XOR.
void fc_xor(char* s, char* k, char* res)
{
unsigned int len1 = strlen(s);
unsigned int len2 = strlen(k);
unsigned int i = 0;
unsigned int j = 0;
while (i <= len1)
{
if(j == len2)
{
j = 0;
}
res[i] = s[i] ^ k[j];
j++;
i++;
}
}
// Simple Send messages.
void send_msg_handler()
{
char message[LENGTH] = {};
@ -51,10 +74,15 @@ void send_msg_handler()
fgets(message, LENGTH, stdin);
str_trim_lf(message, LENGTH);
if (strcmp(message, "exit") == 0)
if (strcmp(message, "CMD:exit") == 0)
{
break;
}
else if (strcmp(message, "CMD:clear") == 0)
{
system("clear");
printf("[+] - Cleaned... \n");
}
else
{
sprintf(buffer, "%s: %s\n", name, message);
@ -68,6 +96,54 @@ void send_msg_handler()
catch_ctrl_c_and_exit(2);
}
// Crypt Send messages.
void send_msg_crpt_handler(char* pswd)
{
char message[LENGTH] = {};
char buffer[LENGTH + 32] = {};
char crypt[LENGTH] = {};
while(1)
{
str_overwrite_stdout();
fgets(message, LENGTH, stdin);
str_trim_lf(message, LENGTH);
if(strcmp(message, "SRV:con") == 0)
{
sprintf(buffer, "%s \n", message);
send(sockfd, buffer, strlen(buffer), 0);
}
else if (strcmp(message, "CMD:exit") == 0)
{
break;
}
else if (strcmp(message, "CMD:pswd") == 0)
{
printf("[*] - Key: %s \n", pswd);
}
else if (strcmp(message, "CMD:clear") == 0)
{
system("clear");
printf("[+] - Cleaned... \n");
}
else
{
sprintf(buffer, "%s: %s \n", name, message);
fc_xor(buffer, pswd, crypt);
send(sockfd, crypt, strlen(crypt), 0);
}
bzero(crypt, LENGTH);
bzero(message, LENGTH);
bzero(buffer, LENGTH + 32);
}
catch_ctrl_c_and_exit(2);
}
// Simple Recive messages.
void recv_msg_handler()
{
char message[LENGTH] = {};
@ -78,117 +154,179 @@ void recv_msg_handler()
if(receive > 0)
{
printf("%s", message);
str_overwrite_stdout();
}
printf("%s \n", message);
str_overwrite_stdout();
}
else if(receive == 0)
{
break;
}
else
{
// -1
}
memset(message, 0, sizeof(message));
// todo: error - recive!
}
memset(message, 0, sizeof(message));
}
}
// Crypt Recive messages.
void recv_msg_crpt_handler(char* pswd)
{
char message[LENGTH] = {};
char decrypt[LENGTH] = {};
while(1)
{
int receive = recv(sockfd, message, LENGTH, 0);
if(receive > 0)
{
if(strncmp(message, "SRV_BOT", 7) == 0)
{
printf("%s", message);
str_overwrite_stdout();
}
else
{
fc_xor(message, pswd, decryt);
printf("%s", decrypt);
str_overwrite_stdout();
}
}
else if(receive == 0)
{
break;
}
else
{
// todo:
}
memset(message, 0, sizeof(message));
memset(decrypt, 0, sizeof(decrypt));
}
}
int main(int argc, char **argv)
{
// Standard parameters
char *ip = "127.0.0.1";
int port = 10117;
char *pswd = "117";
// Standard parameters.
char *ip = "127.0.0.1";
int port = 10117;
char *pswd = "117";
if(argc == 4)
{
printf("[+] - Set User setting.\n");
ip = argv[1];
port = atoi(argv[2]);
pswd = argv[3];
}
else if(argc == 3)
{
printf("[+] - Set User setting.\n");
ip = argv[1];
port = atoi(argv[2]);
}
else if(argc == 2)
{
printf("[+] - Set User setting.\n");
ip = argv[1];
}
else if(argc > 4)
{
printf("[!] - Error ENTER KEY!\n");
return EXIT_FAILURE;
}
else
{
printf("[+] - Set default setting.\n");
}
if(argc == 4)
{
printf("[+] - Set User setting.\n");
ip = argv[1];
port = atoi(argv[2]);
pswd = argv[3];
}
else if(argc == 3)
{
printf("[+] - Set User setting.\n");
ip = argv[1];
port = atoi(argv[2]);
}
else if(argc == 2)
{
printf("[+] - Set User setting.\n");
ip = argv[1];
}
else if(argc > 4)
{
printf("[!] - Error ENTER KEY!\n");
return EXIT_FAILURE;
}
else
{
printf("[+] - Set default setting.\n");
}
printf("Server IP address: %s \n", ip);
printf("Server Port: %d \n", port);
printf("Server Password: %s \n", pswd);
printf("Server Port: %d \n", port);
printf("Server Password: %s \n", pswd);
signal(SIGINT, catch_ctrl_c_and_exit);
signal(SIGINT, catch_ctrl_c_and_exit);
printf("[?] - Please enter your name: ");
fgets(name, 32, stdin);
str_trim_lf(name, strlen(name));
printf("[?] - Please enter your name: ");
fgets(name, 32, stdin);
str_trim_lf(name, strlen(name));
if(strlen(name) > 32 || strlen(name) < 2)
if(strlen(name) > 32 || strlen(name) < 2)
{
printf("[!] - Name must be less than 30 and more than 2 characters!\n");
return EXIT_FAILURE;
}
printf("[!] - Name must be less than 30 and more than 2 characters!\n");
return EXIT_FAILURE;
}
struct sockaddr_in server_addr;
struct sockaddr_in server_addr;
/* Socket settings */
sockfd = socket(AF_INET, SOCK_STREAM, 0);
server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = inet_addr(ip);
server_addr.sin_port = htons(port);
// Socket settings.
sockfd = socket(AF_INET, SOCK_STREAM, 0);
server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = inet_addr(ip);
server_addr.sin_port = htons(port);
// Connect to Server
int err = connect(sockfd, (struct sockaddr *)&server_addr, sizeof(server_addr));
if(err == -1)
// Connect to Server.
int err = connect(sockfd, (struct sockaddr *)&server_addr, sizeof(server_addr));
if(err == -1)
{
printf("[!] - ERROR: connect!\n");
return EXIT_FAILURE;
}
printf("[!] - ERROR: connect!\n");
return EXIT_FAILURE;
}
// Send name
send(sockfd, name, 32, 0);
// Send name to Server.
send(sockfd, name, 32, 0);
printf("--=== WELCOME TO THE CHAT NT117 (Client)===--\n");
printf("--=== WELCOME TO THE CHAT NT117 v0 (Client v0.1.6) ===--\n");
pthread_t send_msg_thread;
if(pthread_create(&send_msg_thread, NULL, (void *) send_msg_handler, NULL) != 0)
// Creat threads Send||Recive with||not crypt masseges.
if(argc == 4)
{
printf("[!] - ERROR: pthread!\n");
return EXIT_FAILURE;
}
pthread_t recv_msg_thread;
if(pthread_create(&recv_msg_thread, NULL, (void *) recv_msg_handler, NULL) != 0)
{
printf("[!] - ERROR: pthread!\n");
return EXIT_FAILURE;
}
while(1)
{
if(flag)
// Crypt thread Send.
pthread_t send_msg_thread;
if(pthread_create(&send_msg_thread, NULL, (void *) send_msg_crpt_handler, pswd) != 0)
{
printf("[*] - Exit...\n");
break;
printf("[!] - ERROR: pthread!\n");
return EXIT_FAILURE;
}
}
close(sockfd);
return EXIT_SUCCESS;
// Crypt thread Recive.
pthread_t recv_msg_thread;
if(pthread_create(&recv_msg_thread, NULL, (void *) recv_msg_crpt_handler, pswd) != 0)
{
printf("[!] - ERROR: pthread!\n");
return EXIT_FAILURE;
}
}
else
{
// Simple thread Send.
pthread_t send_msg_thread;
if(pthread_create(&send_msg_thread, NULL, (void *) send_msg_handler, NULL) != 0)
{
printf("[!] - ERROR: pthread!\n");
return EXIT_FAILURE;
}
// Simple thread Recive.
pthread_t recv_msg_thread;
if(pthread_create(&recv_msg_thread, NULL, (void *) recv_msg_handler, NULL) != 0)
{
printf("[!] - ERROR: pthread!\n");
return EXIT_FAILURE;
}
}
while(1)
{
if(flag)
{
printf("[*] - Exit...\n");
break;
}
}
close(sockfd);
return EXIT_SUCCESS;
}

79
server_NT117.c
View File

@ -17,7 +17,7 @@
static _Atomic unsigned int cli_count = 0;
static int uid = 10;
// Client structure
// Client structure.
typedef struct
{
struct sockaddr_in address;
@ -32,7 +32,7 @@ pthread_mutex_t clients_mutex = PTHREAD_MUTEX_INITIALIZER;
void str_overwrite_stdout()
{
printf("\r%s", "> ");
printf("\r%s", "[>] - ");
fflush(stdout);
}
@ -58,7 +58,7 @@ void print_client_addr(struct sockaddr_in addr)
(addr.sin_addr.s_addr & 0xff000000) >> 24);
}
// Add clients to queue
// Add clients to queue.
void queue_add(client_t *cl)
{
pthread_mutex_lock(&clients_mutex);
@ -75,7 +75,7 @@ void queue_add(client_t *cl)
pthread_mutex_unlock(&clients_mutex);
}
// Remove clients to queue
// Remove clients to queue.
void queue_remove(int uid)
{
pthread_mutex_lock(&clients_mutex);
@ -95,7 +95,7 @@ void queue_remove(int uid)
pthread_mutex_unlock(&clients_mutex);
}
// Send message to all clients except sender
// Send message to all clients except sender.
void send_message(char *s, int uid)
{
pthread_mutex_lock(&clients_mutex);
@ -118,7 +118,30 @@ void send_message(char *s, int uid)
pthread_mutex_unlock(&clients_mutex);
}
// Handle all communication with the client
// Send message to client info sender.
void send_message_u(char *s, int uid)
{
pthread_mutex_lock(&clients_mutex);
for(int i=0; i<MAX_CLIENTS; ++i)
{
if(clients[i])
{
if(clients[i]->uid == uid)
{
if(write(clients[i]->sockfd, s, strlen(s)) < 0)
{
perror("[!] - ERROR: write to descriptor failed");
break;
}
}
}
}
pthread_mutex_unlock(&clients_mutex);
}
// Handle all communication with the client.
void *handle_client(void *arg)
{
char buff_out[BUFFER_SZ];
@ -128,7 +151,7 @@ void *handle_client(void *arg)
cli_count++;
client_t *cli = (client_t *)arg;
// Name
// Name.
if(recv(cli->sockfd, name, 32, 0) <= 0 || strlen(name) < 2 || strlen(name) >= 32-1)
{
printf("[!] - Didn't enter the name.\n");
@ -139,7 +162,6 @@ void *handle_client(void *arg)
strcpy(cli->name, name);
sprintf(buff_out, "%s has joined\n", cli->name);
printf("%s", buff_out);
send_message(buff_out, cli->uid);
}
bzero(buff_out, BUFFER_SZ);
@ -154,19 +176,30 @@ void *handle_client(void *arg)
int receive = recv(cli->sockfd, buff_out, BUFFER_SZ, 0);
if (receive > 0)
{
if(strlen(buff_out) > 0)
//printf("[*] - str: %s", buff_out);
if(strncmp(buff_out, "SRV:con", 7) == 0 && strlen(buff_out) > 0)
{
sprintf(buff_out, "SRV_BOT: ID - %u | Username: %s \n", cli->uid ,cli->name);
send_message_u(buff_out, cli->uid);
} //if( && v == '0')
else if(strlen(buff_out) > 0)
{
send_message(buff_out, cli->uid);
str_trim_lf(buff_out, strlen(buff_out));
printf("%s -> %s\n", buff_out, cli->name);
}
else
{
//todo:
}
}
else if (receive == 0 || strcmp(buff_out, "exit") == 0)
else if (receive == 0 || strcmp(buff_out, "CMD:exit") == 0)
{
// Output: left user.
sprintf(buff_out, "%s has left\n", cli->name);
printf("%s", buff_out);
send_message(buff_out, cli->uid);
leave_flag = 1;
}
else
@ -178,7 +211,7 @@ void *handle_client(void *arg)
bzero(buff_out, BUFFER_SZ);
}
// Delete client from queue and yield thread
// Delete client from queue and yield thread.
close(cli->sockfd);
queue_remove(cli->uid);
free(cli);
@ -190,7 +223,7 @@ void *handle_client(void *arg)
int main(int argc, char **argv)
{
// Standard parameters
// Standard parameters.
char *ip = "127.0.0.1";
int port = 10117;
char *pswd = "117";
@ -233,13 +266,13 @@ int main(int argc, char **argv)
struct sockaddr_in cli_addr;
pthread_t tid;
// Socket settings
// Socket settings.
listenfd = socket(AF_INET, SOCK_STREAM, 0);
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = inet_addr(ip);
serv_addr.sin_port = htons(port);
// Ignore pipe signals
// Ignore pipe signals.
signal(SIGPIPE, SIG_IGN);
if(setsockopt(listenfd, SOL_SOCKET,(SO_REUSEPORT | SO_REUSEADDR),(char*)&option,sizeof(option)) < 0)
@ -248,28 +281,28 @@ int main(int argc, char **argv)
return EXIT_FAILURE;
}
// Bind
// Bind.
if(bind(listenfd, (struct sockaddr*)&serv_addr, sizeof(serv_addr)) < 0)
{
perror("[!] - ERROR: Socket binding failed!");
return EXIT_FAILURE;
}
// Listen
// Listen.
if (listen(listenfd, 10) < 0)
{
perror("[!] - ERROR: Socket listening failed!");
return EXIT_FAILURE;
}
printf("--=== WELCOME TO THE CHAT NT117 (Server) ===--\n");
printf("--=== WELCOME TO THE CHAT NT117 v0 (Server v0.1.4) ===--\n");
while(1)
{
socklen_t clilen = sizeof(cli_addr);
connfd = accept(listenfd, (struct sockaddr*)&cli_addr, &clilen);
// Check if max clients is reached
// Check if max clients is reached.
if((cli_count + 1) == MAX_CLIENTS)
{
printf("[?] - Max clients reached. Rejected: ");
@ -279,17 +312,17 @@ int main(int argc, char **argv)
continue;
}
// Client settings
// Client settings.
client_t *cli = (client_t *)malloc(sizeof(client_t));
cli->address = cli_addr;
cli->sockfd = connfd;
cli->uid = uid++;
// Add client to the queue and fork thread
// Add client to the queue and fork thread.
queue_add(cli);
pthread_create(&tid, NULL, &handle_client, (void*)cli);
// Reduce CPU usage
// Reduce CPU usage.
sleep(1);
}