// ---------------- MAIN PROGRAM -----------------
// Simple usage: client IP port, or client IP (use default port)
int main(int argc, char *argv[]) {
//********************************************************************
// WSSTARTUP
//********************************************************************
#if defined _WIN32
if (WSAStartup(WSVERS, &wsadata) != 0) {
WSACleanup();
printf("WSAStartup failed\n");
}
#endif
//*******************************************************************
// Initialization
//*******************************************************************
//My own
int SN_Base = 0;
int SN_Next = 0;
timer.count = 0;
timer.enabled = 1;
char sendpacket[12] [BUFFERSIZE];
memset(&localaddr, 0, sizeof(localaddr));//clean up
int localPort=1234;
localaddr.sin_family = AF_INET;
localaddr.sin_addr.s_addr = INADDR_ANY;//server address should be local
localaddr.sin_port = htons(localPort);
memset(&remoteaddr, 0, sizeof(remoteaddr));//clean up
//localaddr.sin_addr.s_addr = inet_addr(localIP);
//char localIP[INET_ADDRSTRLEN]="127.0.0.1";
randominit();
//********************************************************************
#if defined __unix__ || defined __APPLE__
int s;
#elif defined _WIN32
SOCKET s;
#endif
char send_buffer[BUFFERSIZE],receive_buffer[BUFFERSIZE];
remoteaddr.sin_family = AF_INET;
//*******************************************************************
// Dealing with user's arguments
//*******************************************************************
if (argc != 5) {
printf("2011 code USAGE: client remote_IP-address port lossesbit(0 or 1) damagebit(0 or 1)\n");
exit(1);
}
remoteaddr.sin_addr.s_addr = inet_addr(argv[1]);//IP address
remoteaddr.sin_port = htons((u_short)atoi(argv[2]));//always get the port number
packets_lostbit=atoi(argv[3]);
packets_damagedbit=atoi(argv[4]);
if (packets_damagedbit<0 || packets_damagedbit>1 || packets_lostbit<0 || packets_lostbit>1){
printf("2011 code USAGE: client remote_IP-address port lossesbit(0 or 1) damagebit(0 or 1)\n");
exit(0);
}
//*******************************************************************
//CREATE CLIENT'S SOCKET
//*******************************************************************
s = socket(AF_INET, SOCK_DGRAM, 0);//this is a UDP socket
if (s < 0) {
printf("socket failed\n");
exit(1);
}
//***************************************************************
//NONBLOCKING OPTION for Windows
//***************************************************************
#if defined _WIN32
u_long iMode=1;
ioctlsocket(s,FIONBIO,&iMode);
#endif
//*******************************************************************
//SEND A TEXT FILE
//*******************************************************************
#if defined __unix__ || defined __APPLE__
FILE *fin=fopen("file1.txt","r");
#elif defined _WIN32
FILE *fin=fopen("file1_Windows.txt","r");
#endif
if(fin==NULL) {
printf("cannot open file\n");
exit(0);
}
while (1) {
//Run the timer if enabled
if(timer.enabled) {
timer.count++;
}
//--------
memset(send_buffer, 0, sizeof(send_buffer));//clean up the send_buffer before reading the next line
if(SN_Next < (SN_Base + N_GBN)) { //Error checking
fgets(send_buffer,SEGMENTSIZE,fin);
}
if (!feof(fin)) {
//Send normally
if(SN_Next < (SN_Base + N_GBN)) {
build_packet(send_buffer, SN_Next, sendpacket[SN_Next]); //Build it
send_unreliably(s, sendpacket[SN_Next], remoteaddr); //Send it
if(SN_Base == SN_Next) {
timer.enabled = 1; //enable the timer
}
SN_Next++;
}
//if timedout, send all packets as not acknowledged
if(timer.count > TIMER_LIMIT) {
timer.enabled = 1; // enable the timer
int i;
for(i = SN_Base; i < SN_Next; i++) {
send_unreliably(s, sendpacket[i], remoteaddr);
#if defined __unix__ || defined __APPLE__
sleep(1);
#elif defined _WIN32
Sleep(1);
#endif
}
}
#if defined __unix__ || defined __APPLE__
sleep(1);
#elif defined _WIN32
Sleep(1000);
#endif
//********************************************************************
//RECEIVE
//********************************************************************
memset(receive_buffer, 0, sizeof(receive_buffer));
recv_nonblocking(s,receive_buffer, remoteaddr);//you can replace this, but use MSG_DONTWAIT to get non-blocking recv
printf("RECEIVE --> %s \n",receive_buffer);
//when CRC check is passed
if(CRC_check(receive_buffer)) {
if(ACK_SN(receive_buffer) > -1) {
SN_Base = ACK_SN(receive_buffer) + 1;
}
//Stop the timer
if(SN_Base == SN_Next) {
timer.enabled = 0;
timer.count = 0;
}
//Start the timer;
else {
timer.enabled = 1;
}
}
#if defined __unix__ || defined __APPLE__
sleep(1);//wait for a bit before trying the next packet
#elif defined _WIN32
Sleep(1000);
#endif
}
else {
printf("end of the file \n");
memset(send_buffer, 0, sizeof(send_buffer));
sprintf(send_buffer,"CLOSE \r\n");
send_unreliably(s,send_buffer,remoteaddr);//we actually send this reliably, read UDP_supporting_functions_2016.c
break;
}
}
//*******************************************************************
//CLOSESOCKET
//*******************************************************************
printf("closing everything on the client's side ... \n");
fclose(fin);
#if defined __unix__ || defined __APPLE__
close(s);
#elif defined _WIN32
closesocket(s);
#endif
exit(0);
}
/* MAIN------------------------------------------------------------------------*/
int main(int argc, char *argv[])
{
// WSSTARTUP
if (WSAStartup(WSVERS, &wsadata) != 0)
{
WSACleanup();
printf("WSAStartup failed\n");
}
// Initialization
memset(&localaddr, 0, sizeof(localaddr));//clean up
int localPort=1234;
localaddr.sin_family = AF_INET;
localaddr.sin_addr.s_addr = INADDR_ANY;//server address should be local
localaddr.sin_port = htons(localPort);
memset(&remoteaddr, 0, sizeof(remoteaddr));//clean up
randominit();
SOCKET s;
char send_buffer[BUFFESIZE],receive_buffer[BUFFESIZE];
remoteaddr.sin_family = AF_INET;
// Dealing with user's arguments
if (argc != 5)
{
printf("2011 code USAGE: client remote_IP-address port lossesbit(0 or 1) damagebit(0 or 1)\n");
exit(1);
}
remoteaddr.sin_addr.s_addr = inet_addr(argv[1]);//IP address
remoteaddr.sin_port = htons((u_short)atoi(argv[2]));//always get the port number
packets_lostbit=atoi(argv[3]);
packets_damagedbit=atoi(argv[4]);
if (packets_damagedbit<0 || packets_damagedbit>1 || packets_lostbit<0 || packets_lostbit>1)
{
printf("2011 code USAGE: client remote_IP-address port lossesbit(0 or 1) damagebit(0 or 1)\n");
exit(0);
}
//CREATE CLIENT'S SOCKET
s = socket(AF_INET, SOCK_DGRAM, 0);//this is a UDP socket
if (s < 0)
{
printf("socket failed\n");
exit(1);
}
//NONBLOCKING OPTION for Windows
u_long iMode=1;
ioctlsocket(s,FIONBIO,&iMode);
//Open A TEXT FILE
int counter=0;//sequence of packets
int ackcounter=0;
char temp_buffer[BUFFESIZE];
char CRC_str[BUFFESIZE];
FILE *fin=fopen("file1_Windows.txt","r");
if(fin==NULL)
{
printf("cannot open file\n");
exit(0);
}
while (1)
{
memset(send_buffer, 0, sizeof(send_buffer));//clean up the send_buffer before reading the next line
fgets(send_buffer,SEGMENTSIZE,fin);
if (!feof(fin)) {
//add a headert to the packet with the sequence number
sprintf(temp_buffer,"PACKET %d ",counter);
counter++;
strcat(temp_buffer,send_buffer);
strcpy(send_buffer,temp_buffer);
//---------coding-------
temp_buffer[strlen(temp_buffer)-1] = 0;
sprintf(CRC_str,"%d ",CRCpolynomial(temp_buffer));
strcat(CRC_str,send_buffer);
strcpy(send_buffer, CRC_str);
//----------------------
send_unreliably(s,send_buffer, remoteaddr);
Sleep(1000);
//RECEIVE
memset(receive_buffer, 0, sizeof(receive_buffer));
recv_nonblocking(s,receive_buffer, remoteaddr);//you can replace this, but use MSG_DONTWAIT to get non-blocking recv
printf("RECEIVE -->%s__\n",receive_buffer);
//printf("@Alan the CRC check result is %d\n",wy_CRC_check(receive_buffer));
Sleep(1000);
}
else
{
printf("end of the file \n");
memset(send_buffer, 0, sizeof(send_buffer));
sprintf(send_buffer,"CLOSE \r\n");
send_unreliably(s,send_buffer,remoteaddr);//we actually send this reliably, read UDP_supporting_functions_2012.c
break;
}
}
//CLOSESOCKET
printf("closing everything on the client's side ... \n");
fclose(fin);
closesocket(s);
exit(0);
}
// Simple usage: client IP port, or client IP (use default port)
int main(int argc, char *argv[]) {
#if defined __unix__ || defined __APPLE__
#elif defined _WIN32
//********************************************************************
// WSSTARTUP
//********************************************************************
if (WSAStartup(WSVERS, &wsadata) != 0) {
WSACleanup();
printf("WSAStartup failed\n");
}
#endif
//*******************************************************************
// Initialization
//*******************************************************************
memset(&localaddr, 0, sizeof(localaddr));//clean up
//char localIP[INET_ADDRSTRLEN]="127.0.0.1";
int localPort=1234;
localaddr.sin_family = AF_INET;
//localaddr.sin_addr.s_addr = inet_addr(localIP);
localaddr.sin_addr.s_addr = INADDR_ANY;//server address should be local
//********************************************************************
localaddr.sin_port = htons(localPort);
memset(&remoteaddr, 0, sizeof(remoteaddr));//clean up
randominit();
#if defined __unix__ || defined __APPLE__
int s;
#elif defined _WIN32
SOCKET s;
#endif
char send_buffer[BUFFESIZE],receive_buffer[BUFFESIZE];
remoteaddr.sin_family = AF_INET;
//*******************************************************************
// Dealing with user's arguments
//*******************************************************************
if (argc != 5) {
printf("2011 code USAGE: client remote_IP-address port lossesbit(0 or 1) damagebit(0 or 1)\n");
exit(1);
}
remoteaddr.sin_addr.s_addr = inet_addr(argv[1]);//IP address
remoteaddr.sin_port = htons((u_short)atoi(argv[2]));//always get the port number
//localaddr.sin_port = htons((u_short)atoi(argv[3]));//always get the port number
packets_lostbit=atoi(argv[3]);
packets_damagedbit=atoi(argv[4]);
if (packets_damagedbit<0 || packets_damagedbit>1 || packets_lostbit<0 || packets_lostbit>1){
printf("2011 code USAGE: client remote_IP-address port lossesbit(0 or 1) damagebit(0 or 1)\n");
exit(0);
}
//*******************************************************************
//CREATE CLIENT'S SOCKET
//*******************************************************************
s = socket(AF_INET, SOCK_DGRAM, 0);//this is a UDP socket
if (s < 0) {
printf("socket failed\n");
exit(1);
}
#if defined __unix__ || defined __APPLE__
#elif defined _WIN32
//***************************************************************//
//NONBLOCKING OPTION for Windows
//***************************************************************//
u_long iMode=1;
ioctlsocket(s,FIONBIO,&iMode);
#endif
//*******************************************************************
//SEND A TEXT FILE
//*******************************************************************
int counter=0;//sequence of packets
int ackcounter=0;
char temp_buffer[BUFFESIZE];
char CRC_str[BUFFESIZE];
#if defined __unix__ || defined __APPLE__
FILE *fin=fopen("file1.txt","r");
#elif defined _WIN32
FILE *fin=fopen("file1_Windows.txt","r");
#endif
if(fin==NULL){
printf("cannot open file\n");
exit(0);
}
while (1){
memset(send_buffer, 0, sizeof(send_buffer));//clean up the send_buffer before reading the next line
fgets(send_buffer,SEGMENTSIZE,fin);
if (!feof(fin)) {
//add a headert to the packet with the sequence number
sprintf(temp_buffer,"PACKET %d ",counter);
counter++;
strcat(temp_buffer,send_buffer);
strcpy(send_buffer,temp_buffer);
//---------coding-------
temp_buffer[strlen(temp_buffer)-1] = 0;
sprintf(CRC_str,"%d ",CRCpolynomial(temp_buffer));
strcat(CRC_str,send_buffer);
strcpy(send_buffer, CRC_str);
//printf("testing:the CRC is %d,lenth is %d \n",CRCpolynomial(temp_buffer),strlen(temp_buffer));
//printf("len= %d the last four :%d %d %d %d",strlen(temp_buffer),temp_buffer[34],temp_buffer[35],temp_buffer[36],temp_buffer[37]);
//----------------------
send_unreliably(s,send_buffer, remoteaddr);
#if defined __unix__ || defined __APPLE__
sleep(1);
#elif defined _WIN32
Sleep(1000);
#endif
//********************************************************************
//RECEIVE
//********************************************************************
memset(receive_buffer, 0, sizeof(receive_buffer));
recv_nonblocking(s,receive_buffer, remoteaddr);//you can replace this, but use MSG_DONTWAIT to get non-blocking recv
printf("RECEIVE --> %s \n",receive_buffer);
#if defined __unix__ || defined __APPLE__
sleep(1);//wait for a bit before trying the next packet
#elif defined _WIN32
Sleep(1000);
#endif
}
else {
printf("end of the file \n");
memset(send_buffer, 0, sizeof(send_buffer));
sprintf(send_buffer,"CLOSE \r\n");
send_unreliably(s,send_buffer,remoteaddr);//we actually send this reliably, read UDP_supporting_functions_2012.c
break;
}
}
//*******************************************************************
//CLOSESOCKET
//*******************************************************************
printf("closing everything on the client's side ... \n");
fclose(fin);
#if defined __unix__ || defined __APPLE__
close(s);
#elif defined _WIN32
closesocket(s);
#endif
exit(0);
}