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Some very basic flow control added to lossless UDP.

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irungentoo 2013-07-16 10:36:59 -04:00
parent d62b91f3ac
commit c8d046e348
1 changed files with 42 additions and 12 deletions
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52
core/Lossless_UDP.c
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@ -40,7 +40,7 @@
#define CONNEXION_TIMEOUT 5
//initial amount of sync/hanshake packets to send per second.
#define SYNC_RATE 10
#define SYNC_RATE 2
//initial send rate of data.
#define DATA_SYNC_RATE 30
@ -66,7 +66,8 @@ typedef struct
uint16_t data_rate;//current data packet send rate packets per second.
uint64_t last_SYNC; //time at which our last SYNC packet was sent.
uint64_t last_sent; //time at which our last data or handshake packet was sent.
uint64_t last_recv; //time at which we last received something from the other
uint64_t last_recvSYNC; //time at which we last received a SYNC packet from the other
uint64_t last_recvdata; //time at which we last received a DATA packet from the other
uint64_t killat; //time at which to kill the connection
Data sendbuffer[MAX_QUEUE_NUM];//packet send buffer.
Data recvbuffer[MAX_QUEUE_NUM];//packet receive buffer.
@ -168,7 +169,7 @@ int new_connection(IP_Port ip_port)
connections[i].successful_sent = connections[i].handshake_id1;
connections[i].SYNC_rate = SYNC_RATE;
connections[i].data_rate = DATA_SYNC_RATE;
connections[i].last_recv = current_time();
connections[i].last_recvSYNC = current_time();
connections[i].killat = ~0;
connections[i].send_counter = 0;
return i;
@ -197,7 +198,7 @@ int new_inconnection(IP_Port ip_port)
connections[i].inbound = 2;
connections[i].SYNC_rate = SYNC_RATE;
connections[i].data_rate = DATA_SYNC_RATE;
connections[i].last_recv = current_time();
connections[i].last_recvSYNC = current_time();
//if this connection isn't handled within 5 seconds, kill it
connections[i].killat = current_time() + 1000000UL*CONNEXION_TIMEOUT;
connections[i].send_counter = 127;
@ -565,7 +566,7 @@ int handle_SYNC3(int connection_id, uint8_t counter, uint32_t recv_packetnum, ui
connections[connection_id].orecv_packetnum = recv_packetnum;
connections[connection_id].osent_packetnum = sent_packetnum;
connections[connection_id].successful_sent = recv_packetnum;
connections[connection_id].last_recv = current_time();
connections[connection_id].last_recvSYNC = current_time();
connections[connection_id].recv_counter = counter;
connections[connection_id].send_counter++;
for(i = 0; i < number; i++)
@ -635,6 +636,7 @@ int add_recv(int connection_id, uint32_t data_num, uint8_t * data, uint16_t size
{
memcpy(connections[connection_id].recvbuffer[i % MAX_QUEUE_NUM].data, data, size);
connections[connection_id].recvbuffer[i % MAX_QUEUE_NUM].size = size;
connections[connection_id].last_recvdata = current_time();
if(sent_packet < BUFFER_PACKET_NUM)
{
connections[connection_id].osent_packetnum = data_num;
@ -722,7 +724,7 @@ void doNew()
}
//kill all timed out connections
if( connections[i].status > 0 && (connections[i].last_recv + CONNEXION_TIMEOUT * 1000000UL) < temp_time &&
if( connections[i].status > 0 && (connections[i].last_recvSYNC + CONNEXION_TIMEOUT * 1000000UL) < temp_time &&
connections[i].status != 4)
{
//kill_connection(i);
@ -755,15 +757,19 @@ void doSYNC()
void doData()
{
uint32_t i;
uint64_t j;
uint64_t temp_time = current_time();
for(i = 0; i < MAX_CONNECTIONS; i++)
{
if(connections[i].status == 3)
if(connections[i].status == 3 && sendqueue(i) != 0)
{
if((connections[i].last_sent + (1000000UL/connections[i].data_rate)) <= temp_time)
{
send_DATA(i);
connections[i].last_sent = temp_time;
for(j = connections[i].last_sent; j < temp_time; j += (1000000UL/connections[i].data_rate))
{
send_DATA(i);
}
connections[i].last_sent = temp_time;
}
}
}
@ -771,12 +777,36 @@ void doData()
//TODO: flow control.
//automatically adjusts send rates of packets for optimal transmission.
#define MAX_SYNC_RATE 10
void adjustRates()
{
//if()
uint32_t i;
uint64_t temp_time = current_time();
for(i = 0; i < MAX_CONNECTIONS; i++)
{
if(connections[i].status == 3)
{
if(sendqueue(i) != 0)
{
connections[i].data_rate = (BUFFER_PACKET_NUM - connections[i].num_req_paquets) * MAX_SYNC_RATE;
connections[i].SYNC_rate = MAX_SYNC_RATE;
}
else if(connections[i].last_recvdata + 1000000UL > temp_time)
{
connections[i].SYNC_rate = MAX_SYNC_RATE;
}
else
{
connections[i].SYNC_rate = SYNC_RATE;
}
}
}
}
//Call this function a couple times per second
//It's the main loop.
void doLossless_UDP()