void clientHandler(int clientSocket)
{
// connection error
if(clientSocket < 0){
printf("%s", "Error connecting to clientSocket.\n");
exit(EXIT_FAILURE);
}
int in_session = -1;
// read from client
char buffer[256]; // buffer for socket messages
while(1){
bzero((void*) buffer, 256);
if((read(clientSocket, buffer, 255)) <= 0){ // no response
exit(EXIT_SUCCESS);
}
// parse command
char *command = strtok(buffer, " \n");
char *commandArg = strtok(NULL, " \n");
if(strcmp(command, "open") == 0){ // open account
openAccount(clientSocket, commandArg, &in_session);
}
else if(strcmp(command, "start") == 0){ // start account session
startAccount(clientSocket, commandArg, &in_session);
}
else if(strcmp(command, "credit") == 0){ // credit account
creditAccount(clientSocket, commandArg, &in_session);
}
else if(strcmp(command, "debit") == 0){ // debit account
debitAccount(clientSocket, commandArg, &in_session);
}
else if(strcmp(command, "balance") == 0){ // get balance
getBalance(clientSocket, &in_session);
}
else if(strcmp(command, "finish") == 0){ // finish
finishSession(clientSocket, &in_session);
}
else{
printf("%s", "Client done goofed, abort mission.");
exit(EXIT_FAILURE);
}
}
return;
}
/**
* Processes the input from the client, given the command, argument, and state
* of the client.
*
* The 'state' is simply whether or not the client is in a session.
* -1: Client wishes to exit
* 0: Client is connected, but is not in an account session
* 1: Client is connected and is in an account session
*
*/
int process_input(char *buffer, int state, client_t **client){
int i;
char *parsed = NULL;
int len = strlen(buffer);
for(i = 0; i < len; i++){
if(buffer[i] == '\n'){
if(i == 0){
/*If it's just a newline*/
break;
}
parsed = malloc(sizeof(char)*(i+1));
strncpy(parsed, buffer, i);
parsed[i] = '\0';
break;
}
}
if(parsed == NULL){
printf("Error parsing buffer.\n");
return state;
}
printf("CLIENT> %s\n", parsed);
Node **list = &((*client)->head);
char *command, *arg;
char name[MAX_ARG_LEN];
command = strtok(parsed, " ");
arg = strtok(NULL, " ");
memset(name, '\0', sizeof(name));
if(arg != NULL){
strcpy(name, arg);
}
if(strcmp(parsed, "exit") == 0){
printf("Client exits!\n");
if(state == 1){
printf("Finishing customer session.\n");
Node *node = findAccount((*client)->current_acc, *list);
Account *acc = node->account;
finishAccount(&acc, state);
free((*client)->current_acc);
}
update_client_count(-1);
free(parsed);
return -1;
}else if(strcmp(command, "open") == 0){
if(state == 1){
printf("Still in customer session!\n");
free(parsed);
return 1;
}
int open = openAccount(list, name);
char *msg = "Account opened for ";
printf("%s%s.\n", msg, name);
if(open == -1){
printf("Error opening account!\n");
free(parsed);
return 0;
}
free(parsed);
return 0;
}else if(strcmp(command, "start") == 0){
if(state == 0){
Node *ptr = findAccount(name, *list);
if(ptr == NULL){
free(parsed);
return 0;
}
Account *acc = ptr->account;
int n = startAccount(&acc, list);
if(n == 0){
printf("Account is still in use.\n");
free(parsed);
return 0;
}
char *current = malloc(strlen(name)*sizeof(char));
strcpy(current, name);
(*client)->current_acc = current;
free(parsed);
return 1;
}else{
printf("Still in session!\n");
free(parsed);
return 1;
}
}else if(strcmp(command, "credit") == 0){
if(state == 1){
float new = updateAccount((*client)->current_acc, list, atof(arg));
printf("Balance of %s is now %.2f.\n", (*client)->current_acc, new);
free(parsed);
return 1;
}else{
void *new_session(void *arg) {
connection_t * conn;
char acctName[100];
char buffer[256];
char *buf;
long n;
int rc;
//long addr = 0;
if (!arg)
pthread_exit(0);
conn = (connection_t *)arg;
while(1){
int x, index;
double amount;
double balance;
bzero(buffer,256);
bzero(acctName,100);
n = read(conn->sock,buffer,255);
if (n < 0){
printf("Error reading from socket\n");
pthread_exit(NULL);
}
if(strncasecmp(buffer, "Exit", 4) == 0){
if(conn->session > -1)
bank->accounts[conn->session].session = -1;
conn->session = -1;
printf("Client %d exited\n", conn->sock);
n = write(conn->sock, "Exiting...", 10);
close(conn->sock);
free(conn);
pthread_exit(NULL);
}
if(strncasecmp(buffer, "Open", 4) == 0){
//n = write(conn->sock,"Open",4);
buf = buffer + 4;
sscanf(buf, "%s", acctName);
if(addAccount(acctName) == 0){
printf("Client %d added account: %s\n", conn->sock, acctName);
n = write(conn->sock,"Added account\n", 30);
}else{
printf("Client %d could not add account: %s. The account already exists or there is no space available.\n", conn->sock, acctName);
n = write(conn->sock, "Error: could not add account. The account already exists or there is no space available.\n", 100);
}
if (n < 0){
printf("Error writing to socket\n");
pthread_exit(NULL);
}
} else if(strncasecmp(buffer, "Start", 5) == 0){
//printf("Here is the command: %s\n",buffer);
//n = write(conn->sock,"Start",5);
if(conn->session != -1){
printf("Client %d tried to start an account but client is already in session\n", conn->pid);
n = write(conn->sock,"Client is already in session\n", 30);
if (n < 0){
printf("Error writing to socket\n");
pthread_exit(NULL);
}
continue;
}
buf = buffer + 5;
sscanf(buf, "%s", acctName);
x = startAccount(acctName);
if(x >= 0){
printf("Client %d started account: %s\n", conn->pid, acctName);
n = write(conn->sock,"Started account\n", 30);
conn->session = x;
}else if(x == -1){
printf("Client %d could not start account: %s. Account does not exist.\n", conn->pid, acctName);
n = write(conn->sock, "Error: could not start account. Account does not exist.\n", 100);
}else{
printf("Client %d could not start account: %s. Account is in session.\n", conn->pid, acctName);
n = write(conn->sock, "Error: could not start account. Account is in session.\n", 100);
}
if (n < 0){
printf("Error writing to socket\n");
pthread_exit(NULL);
}
} else if(strncasecmp(buffer, "Credit", 6) == 0){
//printf("Here is the command: %s\n",buffer);
//n = write(conn->sock,"Credit",6);
if(conn->session == -1){
printf("Client %d tried to credit account, but client is not in session.\n", conn->sock);
n = write(conn->sock,"Client is not in session.\n", 30);
if (n < 0){
printf("Error writing to socket\n");
pthread_exit(NULL);
}
continue;
}
buf = buffer + 6;
sscanf(buf, "%lf", &amount);
creditAccount(conn->session, amount);
printf("Client %d deposited $%.2f\n", conn->sock, amount);
n = write(conn->sock, "Credited account.\n", 30);
if (n < 0){
printf("Error writing to socket\n");
pthread_exit(NULL);
}
} else if(strncasecmp(buffer, "Debit", 5) == 0){
//printf("Here is the command: %s\n",buffer);
//n = write(conn->sock,"Debit",5);
if(conn->session == -1){
printf("Client %d tried to debit account, but client is not in session.\n", conn->sock);
n = write(conn->sock,"Client is not in session.\n", 30);
if (n < 0){
printf("Error writing to socket\n");
pthread_exit(NULL);
}
continue;
}
buf = buffer + 5;
sscanf(buf, "%lf", &amount);
x = debitAccount(conn->session, amount);
if(x == 0){
printf("Client %d withdrew $%.2f\n", conn->sock, amount);
n = write(conn->sock, "Debited account.\n", 30);
}else{
printf("Client %d tried to debit account, but does not have enough funds.\n", conn->sock, amount);
n = write(conn->sock, "Not enough funds.\n", 30);
}
if (n < 0){
printf("Error writing to socket\n");
pthread_exit(NULL);
}
} else if(strncasecmp(buffer, "Balance", 7) == 0){
//printf("Here is the command: %s\n",buffer);
//n = write(conn->sock,"Balance",7);
if(conn->session == -1){
printf("Client %d requested balance, but client is not in session.\n", conn->sock);
n = write(conn->sock,"Client is not in session.\n", 30);
if (n < 0){
printf("Error writing to socket\n");
pthread_exit(NULL);
}
continue;
}
buf = buffer;
index = conn->session;
//printf("%d\n", index);
balance = bank->accounts[index].balance;
printf("Client %d requested balance.\n", conn->sock);
printf("Printed balance of %.2f\n", balance);
sprintf(buf, "Balance for account %s is $%.2f\n", &(bank->accounts[conn->session].name), &balance);
n = write(conn->sock, buf, 100);
if (n < 0){
printf("Error writing to socket\n");
pthread_exit(NULL);
}
} else if(strncasecmp(buffer, "Finish", 6) == 0){
//printf("Here is the command: %s\n",buffer);
//n = write(conn->sock,"Finish",6);
if(conn->session == -1){
printf("Client %d tried to finish session, but client is not in session.\n", conn->sock);
n = write(conn->sock,"Client is not in session.\n", 30);
if (n < 0){
printf("Error writing to socket\n");
pthread_exit(NULL);
}
continue;
}
bank->accounts[conn->session].session = -1;
conn->session = -1;
printf("Client %d finished session.\n", conn->sock);
n = write(conn->sock, "Finished session\n", 30);
if (n < 0){
printf("Error writing to socket\n");
pthread_exit(NULL);
}
} else {
printf("Invalid command\n");
n = write(conn->sock,"Invalid commmand", 16);
if (n < 0){
printf("Error writing to socket\n");
pthread_exit(NULL);
}
}
}
}
