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/* Lossless_UDP testserver
* A program that waits for a lossless UDP connection and then saves all the data recieved to a file.
* NOTE: this program simulates a 33% packet loss.
*
* Best used in combination with Lossless_UDP_testclient
*
* Compile with: gcc -O2 -Wall -o testserver ../core/network.c ../core/Lossless_UDP.c Lossless_UDP_testserver.c
*
* Command line argument is the name of the file to save what we recieve to.
* EX: ./testserver filename1.txt
*/
#include "../core/network.h"
#include "../core/Lossless_UDP.h"
//Sleep function (x = milliseconds)
#ifdef WIN32
#define c_sleep(x) Sleep(1*x)
#else
#include <unistd.h>
#include <arpa/inet.h>
#define c_sleep(x) usleep(1000*x)
#endif
#define PORT 33445
void printpacket(char * data, uint32_t length, IP_Port ip_port)
{
uint32_t i;
printf("UNHANDLED PACKET RECEIVED\nLENGTH:%u\nCONTENTS:\n", length);
printf("--------------------BEGIN-----------------------------\n");
for(i = 0; i < length; i++)
{
if(data[i] < 16)
printf("0");
printf("%hhX",data[i]);
}
printf("\n--------------------END-----------------------------\n\n\n");
}
/*
void printpackets(Data test)
{
int i;
if(test.size == 0)
return;
printf("SIZE: %u\n", test.size);
for(i =0; i < test.size; i++)
{
printf("%hhX", test.data[i]);
}
printf("\n");
}
void printconnection(int connection_id)
{
printf("--------------------BEGIN---------------------\n");
IP_Port ip_port = connections[connection_id].ip_port;
printf("IP: %u.%u.%u.%u Port: %u\n",ip_port.ip.c[0],ip_port.ip.c[1],ip_port.ip.c[2],ip_port.ip.c[3],ntohs(ip_port.port));
printf("status: %u, inbound: %u, SYNC_rate: %u\n", connections[connection_id].status,
connections[connection_id].inbound, connections[connection_id].SYNC_rate);
printf("data rate: %u, last sync: %llu, last sent: %llu, last recv: %llu \n", connections[connection_id].data_rate,
connections[connection_id].last_SYNC, connections[connection_id].last_sent, connections[connection_id].last_recv);
int i;
for(i =0; i < MAX_QUEUE_NUM; i++)
{
printf(" %u ",i);
printpackets(connections[connection_id].sendbuffer[i]);
}
for(i =0; i < MAX_QUEUE_NUM; i++)
{
printf(" %u ",i);
printpackets(connections[connection_id].recvbuffer[i]);
}
Data sendbuffer[MAX_QUEUE_NUM];
Data recvbuffer[MAX_QUEUE_NUM];
printf("recv_num: %u, orecv_num: %u, sent_packetnum %u, osent_packetnum: %u, successful_sent: %u, successful_read: %u\n",
connections[connection_id].recv_packetnum,
connections[connection_id].orecv_packetnum, connections[connection_id].sent_packetnum, connections[connection_id].osent_packetnum,
connections[connection_id].successful_sent,
connections[connection_id].successful_read);
printf("req packets: \n");
for(i = 0; i < BUFFER_PACKET_NUM; i++)
{
printf(" %u ", connections[connection_id].req_packets[i]);
}
printf("\nNumber: %u recv_counter: %u, send_counter: %u\n", connections[connection_id].num_req_paquets,
connections[connection_id].recv_counter, connections[connection_id].send_counter);
printf("--------------------END---------------------\n");
}
*/
//recieve packets and send them to the packethandler
//run doLossless_UDP();
void Lossless_UDP()
{
IP_Port ip_port;
char data[MAX_UDP_PACKET_SIZE];
uint32_t length;
while(recievepacket(&ip_port, data, &length) != -1)
{
if(rand() % 3 != 1)//add packet loss
{
if(LosslessUDP_handlepacket(data, length, ip_port))
{
printpacket(data, length, ip_port);
}
else
{
//printconnection(0);
// printf("Received handled packet with length: %u\n", length);
}
}
}
doLossless_UDP();
}
int main(int argc, char *argv[])
{
if (argc < 2)
{
printf("usage: %s filename\n", argv[0]);
exit(0);
}
char buffer[128];
int read;
FILE *file = fopen(argv[1], "wb");
if ( file==NULL ){return 1;}
//initialize networking
//bind to ip 0.0.0.0:PORT
IP ip;
ip.i = 0;
init_networking(ip, PORT);
perror("Initialization");
int connection;
uint64_t timer = current_time();
while(1)
{
Lossless_UDP();
connection = incoming_connection();
if(connection != -1)
{
if(is_connected(connection) == 2)
{
printf("Recieved the connection.\n");
}
break;
}
c_sleep(1);
}
timer = current_time();
while(1)
{
//printconnection(0);
Lossless_UDP();
if(is_connected(connection) >= 2)
{
read = read_packet(connection, buffer);
if(read != 0)
{
// printf("Recieved data.\n");
if(!fwrite(buffer, read, 1, file))
{
printf("file write error\n");
}
}
}
else
{
printf("Connecting Lost after: %llu us\n", (unsigned long long)(current_time() - timer));
fclose(file);
return 1;
}
c_sleep(1);
}
return 0;
}
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