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#include <stdlib.h>
#include <unistd.h>
#include <bits/pthreadtypes.h>
#include <pthread.h>
#include <netinet/in.h>
#include <stdio.h>
#include <Server.h>
#include <sys/socket.h>
#include <poll.h>
#include <stdbool.h>
#include <string.h>
struct AcceptedSocket* acceptIncoming(struct Server *server){
int serverSocketFd=server->socket;
struct sockaddr_in clientAddress;
socklen_t ClientAddressSize = sizeof(struct sockaddr);
int clientSocketFD = accept(serverSocketFd,(struct sockaddr *)&clientAddress,&ClientAddressSize);
if(server->running){
struct AcceptedSocket* acceptedSocket = malloc(sizeof(struct AcceptedSocket));
acceptedSocket->address=clientAddress;
acceptedSocket->socketFD=clientSocketFD;
acceptedSocket->succ=clientSocketFD>0;
acceptedSocket->next=NULL;
acceptedSocket->shutdown=false;
if(!acceptedSocket){
acceptedSocket->error=clientSocketFD;
} else {
if(server->running){
struct AcceptedSocket *sel_socket=server->accepted_socket;
if(sel_socket==NULL){
server->accepted_socket=acceptedSocket;
} else {
while(1){
if(sel_socket->next==NULL){
sel_socket->next=acceptedSocket;
break;
} else {
sel_socket=sel_socket->next;
}
}
}
}
}
return acceptedSocket;
} else {
return NULL;
}
}
struct recv_data_arg{
int socketFD;
struct Server *server;
struct AcceptedSocket *curr_socket;
};
void *recv_data(void *threadarg){
struct recv_data_arg *recv_d_arg;
recv_d_arg=(struct recv_data_arg *) threadarg;
while(recv_d_arg->server->running){
char buffer[30000]={0};
ssize_t amountRecv=recv(recv_d_arg->socketFD, buffer, 30000, 0);
if(recv_d_arg->server->running){
if(amountRecv==0) break;
recv_d_arg->server->on_message(recv_d_arg->server, buffer, amountRecv, recv_d_arg->socketFD);
}
}
recv_d_arg->curr_socket->shutdown=true;
close(recv_d_arg->socketFD);
if(recv_d_arg->server->on_disconnect){
recv_d_arg->server->on_disconnect(recv_d_arg->server,recv_d_arg->socketFD);
}
free(recv_d_arg);
pthread_exit(NULL);
}
void cleanup_conns(struct Server *server){
if(server->accepted_socket){
struct AcceptedSocket *sel_socket=server->accepted_socket;
struct AcceptedSocket *prev_socket=server->accepted_socket;
struct AcceptedSocket *prev2_socket=server->accepted_socket;
while (sel_socket!=NULL){
sel_socket=sel_socket->next;
if(prev_socket->shutdown==true){
if(prev_socket==server->accepted_socket){
free(server->accepted_socket);
server->accepted_socket=sel_socket;
} else {
free(prev2_socket->next);
prev2_socket->next=sel_socket;
}
} else {
prev2_socket=prev_socket;
}
prev_socket=sel_socket;
}
}
}
void *await_client(void *threadarg){
struct Server *server;
server=(struct Server *) threadarg;
while (server->running){
printf("\n=== WAITING FOR CONNECTION ===\n\n");
struct AcceptedSocket* new_socket = acceptIncoming(server);
if(server->running){
if(new_socket->succ==0){ free(new_socket); } else {
struct recv_data_arg *recv_d_arg;
recv_d_arg=malloc(sizeof(* recv_d_arg));
recv_d_arg->socketFD=new_socket->socketFD;
recv_d_arg->server=server;
recv_d_arg->curr_socket=new_socket;
int thread_err=pthread_create(&new_socket->thread_id, NULL, recv_data, recv_d_arg);
}
}
}
pthread_exit(NULL);
}
void *cleanup_loop(void *threadarg){
struct Server *server;
server=(struct Server *) threadarg;
while(server->running){
cleanup_conns(server);
sleep(60);
}
pthread_exit(NULL);
}
void server_close_socket(struct Server *server){
server->running=false;
struct AcceptedSocket *sel_socket_A=server->accepted_socket;
while(sel_socket_A!=NULL){
close(sel_socket_A->socketFD);
sel_socket_A->shutdown=true;
sel_socket_A=sel_socket_A->next;
}
int shuterr=shutdown(server->socket,SHUT_RDWR);
int closeerr=close(server->socket);
sleep(2);
cleanup_conns(server);
printf("\nshutdown with %d : %d\n",shuterr,closeerr);
}
pthread_t launch_socket(struct Server *server){
int addrlen= sizeof(server->address);
printf("running on port: %d\n",server->port);
pthread_t id2;
int thread_err2=pthread_create(&id2, NULL, cleanup_loop, (void *) server);
if (thread_err2!=0){
fprintf(stderr,"ERROR WITH CLEANUP LOOP: %d\n",thread_err2);
perror("cleanup loop err");
exit(-1);
}
pthread_t id;
int thread_err=pthread_create(&id, NULL, await_client, (void *) server);
if (thread_err!=0){
fprintf(stderr,"ERROR WITH AWAIT CLIENT: %d\n",thread_err);
perror("await client error");
exit(-1);
}
return id;
}
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