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;
}
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);
}
}
}
}