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server.cpp
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server.cpp
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#include "server.h"
Server::Server() {
server_socket = -1;
server_addr = allocate_str_mem(INET_ADDRSTRLEN);
signal(SIGPIPE, SIG_IGN);
}
Server::Server(const Server &src_obj) {
server_addr = allocate_str_mem(INET_ADDRSTRLEN);
status = src_obj.status;
server_port = src_obj.server_port;
strcpy(server_addr, src_obj.server_addr);
server_socket = src_obj.server_socket;
server_sock_addr = src_obj.server_sock_addr;
Packet pkt = src_obj.pkt;
client_num = src_obj.client_num;
client_sock_addr = src_obj.client_sock_addr;
clients = src_obj.clients;
tid = src_obj.tid;
tpool = src_obj.tpool;
}
void swap(Server &src_obj, Server &dst_obj) {
using std::swap;
swap(src_obj.status, dst_obj.status);
swap(src_obj.server_port, dst_obj.server_port);
swap(src_obj.server_addr, dst_obj.server_addr);
swap(src_obj.server_socket, dst_obj.server_socket);
swap(src_obj.server_sock_addr, dst_obj.server_sock_addr);
swap(src_obj.pkt, dst_obj.pkt);
swap(src_obj.client_num, dst_obj.client_num);
swap(src_obj.client_sock_addr, dst_obj.client_sock_addr);
swap(src_obj.clients, dst_obj.clients);
swap(src_obj.tid, dst_obj.tid);
swap(src_obj.tpool, dst_obj.tpool);
}
Server& Server::operator=(Server src_obj) {
swap(*this, src_obj);
return *this;
}
Server::Server(Server&& src_obj)
:Server() {
swap(*this, src_obj);
}
void Server::begin_thread_pool(int count, void*(*thread_func)(void*)) {
tpool.set_max_threads(count);
tpool.set_thread_func(thread_func);
tpool.create_threads();
}
void Server::set_total_connections(int total_connections) {
clients.resize(total_connections);
tid.resize(total_connections);
}
void Server::fill_server_details(int arg_server_port, const char *arg_server_addr) {
strcpy(server_addr, arg_server_addr);
bzero((char *) &server_sock_addr, sizeof(server_sock_addr));
server_sock_addr.sin_family = AF_INET;
server_sock_addr.sin_port = (arg_server_port)?htons(arg_server_port):arg_server_port;
status = inet_aton(server_addr, &server_sock_addr.sin_addr);
if (status == 0) {
cout << "ERROR: Invalid IP address" << endl;
exit(EXIT_FAILURE);
}
}
void Server::bind_server() {
server_socket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
report_error(server_socket);
setsockopt(server_socket, SOL_SOCKET, SO_REUSEADDR, &g_reuse, sizeof(int));
socklen_t len = sizeof(sockaddr_in);
status = bind(server_socket, (struct sockaddr*)&server_sock_addr, sizeof(server_sock_addr));
report_error(status);
getsockname(server_socket, (struct sockaddr*)&server_sock_addr, &len);
server_port = ntohs(server_sock_addr.sin_port);
//cout << "Server binded with port " << server_port << endl;
}
void Server::listen_accept() {
ClientDetails entity;
while (1) {
status = recvfrom(server_socket, pkt.data, BUFFER_SIZE, 0, (sockaddr*)&entity.client_sock_addr, &g_addr_len);
report_error(status);
memcpy(&entity.num, pkt.data, sizeof(int));
status = pthread_mutex_lock(&tpool.conn_lock);
report_error(status, "Error in locking");
if (tpool.connections.size() == tpool.max_threads) {
status = pthread_cond_wait(&tpool.conn_full, &tpool.conn_lock);
report_error(status, "Error in conditional wait");
}
tpool.connections.push(entity);
status = pthread_cond_signal(&tpool.conn_req);
report_error(status, "Error in signalling");
status = pthread_mutex_unlock(&tpool.conn_lock);
report_error(status, "Error in unlocking");
// cout << "Server side: Connection made with Client " << entity.num << endl;
}
}
void Server::listen_accept(void*(*multithreading_func)(void*)) {
int i;
i = 0;
while (1) {
status = recvfrom(server_socket, pkt.data, BUFFER_SIZE, 0, (sockaddr*)&clients[i].client_sock_addr, &g_addr_len);
memcpy(&clients[i].num, pkt.data, sizeof(int));
report_error(status);
status = pthread_create(&tid[i], NULL, multithreading_func, &clients[i]);
report_error(status);
cout << "Server side: Connection made with Client " << clients[i].num << endl;
i++;
}
}
void Server::connect_with_client() {
pkt.clear_data();
pkt.fill_data(0, sizeof(int), server_port);
pkt.make_data_packet();
write_data();
}
void Server::read_data() {
pkt.clear_data();
status = recvfrom(server_socket, pkt.data, BUFFER_SIZE, 0, (sockaddr*)&client_sock_addr, &g_addr_len);
report_error(status);
pkt.data_len = status;
//check_conn(status);
}
void Server::write_data() {
status = sendto(server_socket, pkt.packet, pkt.packet_len, 0, (sockaddr*)&client_sock_addr, g_addr_len);
report_error(status);
}
Server::~Server() {
free(server_addr);
if (server_socket >= 0)
close(server_socket);
}