// ---------------------------------------- server_start -------------------------------------------
void server_start() {
int master_sockfd, current_sockfd;
socklen_t client_len;
struct sockaddr_in serv_addr, client_addr;
char buffer[1000], c;
int nread, i;
// Create master socket:
if ((master_sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { //0 is a fixed number; always use 0
perror("Server: Cannot create master socket.");
exit(-1);
}
// create socket structure
bzero((char *) &serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET; //connects to internet
serv_addr.sin_addr.s_addr = INADDR_ANY; //allows anyone to connect
serv_addr.sin_port = htons(portno); //designates a port number to connect to
// bind the socket to the local port
if (bind(master_sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
perror("Server: Error on binding");
exit(1);
}
// listen
listen(master_sockfd, 5); //5 is a fixed number; always use 5
client_len = sizeof(client_addr);
printf("Server listening on port %d\n", portno);
// master loop
while(TRUE) {
// block until a client connects
if ((current_sockfd = accept(master_sockfd, (struct sockaddr *) &client_addr, &client_len)) < 0) {
perror("Server: Error on accept()");
exit(1);
}
nread = read(current_sockfd, buffer, 1000); //reads from client (255 character max)
if (nread > 0) {
// Quit command received?
if (buffer[0] == 'q') { //if string starts with q, then quit and close the server
//write(current_sockfd, QUITTING, sizeof(QUITTING));
close(current_sockfd);
close(master_sockfd);
printf("Server quitting...\n");
exit(0);
}
// upper-case command received?
else{
char *fields[6];
SeparateIntoFields(buffer, fields, 6);
runMyStore(fields[1], fields[2], fields[3], fields[4], fields[5]);
write(current_sockfd, sendToClient, 1000); //write to client
close(current_sockfd);
}
}
}
}
//current_sockfd == file descriptor of pipe from client
//buffer == input from client
//nread == num chars of input
void server_process(int current_sockfd, char *buffer, int nread){
printf("message from client: %s\n", buffer);
//Essentially original mystore3 main function,
//with return statements eliminated
char inputCopy[strlen(buffer)];
strcpy(inputCopy, buffer+1);
char *fields[5];
//int nfields;
if (!Process(inputCopy)) {
if (errmsg[0] != '\0')
printf("%s\n",errmsg);
else
printf("|status: ERROR: No command-line arguments, error in arguments, or error in writing to FIFO\n\nVersion: %s\n%s|\n",
version,Requests);
}
if (!readData()) {
if (errmsg[0] != '\0')
printf("|status: ERROR: %s|\n", errmsg);
else
printf("|status: ERROR: Error reading mystore.dat\n\n%s|\n", Requests);
}
strcpy(inputCopy, buffer+1);
SeparateIntoFields(inputCopy, fields, 5);
if (command == ADD && !add(fields[2],fields[3])) {
if (errmsg[0] != '\0')
printf("|status: ERROR: %s|\n", errmsg);
else
printf("|status: ERROR: Failure to add new item|\n");
}
if (command == STAT) {
status();
}
if (command == DISPLAY && !display(fields[2])) {
if (errmsg[0] != '\0')
printf("|status: ERROR: %s|\n", errmsg);
else
printf("|status: ERROR: Cannot display %s|\n",fields[2]);
}
if (command == DELETE && !delete(fields[2])) {
if (errmsg[0] != '\0')
printf("|status: ERROR: %s|\n", errmsg);
else
printf("|status: ERROR: Cannot delete %s|\n", fields[2]);
}
if (command == EDIT && !edit(fields[2])) {
if (errmsg[0] != '\0')
printf("|status: ERROR: %s|\n", errmsg);
else
printf("|status: ERROR: cannot edit %s|\n",fields[2]);
}
if (rewrite)
if (!writeData()) {
if (errmsg[0] != '\0')
printf("|status: ERROR: %s|\n", errmsg);
else
printf("|status: ERROR: Could not write the data, file may be destroyed|\n");
}
}
