#include "reorderer.h"
#include "protocol.h"
+#include "timeutil.h"
-#define PACKET_BUFFER_SIZE 100
+#define PACKET_BUFFER_SIZE 1000
+#define TIMEOUT_SEC 1.000
using namespace std;
Reorderer::Reorderer(Sender* sender)
: sender(sender), last_seq(-1)
{
+ gettimeofday(&last_sent_packet, NULL);
+}
+
+void Reorderer::possibly_adjust_tv(timeval *tv)
+{
+ if (packet_buffer.empty()) {
+ return;
+ }
+
+ timeval now;
+ gettimeofday(&now, NULL);
+ timeval tdiff = subtract_timeval_saturate(
+ offset_timeval_seconds(packet_buffer.top().ts, TIMEOUT_SEC), now);
+ if (less_than(tdiff, *tv)) {
+ *tv = tdiff;
+ }
}
void Reorderer::send_packet(uint16_t proto, const string& data, int seq)
{
+ timeval now;
+ gettimeofday(&now, NULL);
+
bool silence = false;
if (packet_buffer.size() >= PACKET_BUFFER_SIZE) {
- printf("Gave up waiting for packets [%d,%d>\n",
+ printf("Gave up waiting for packets [%d,%d> (buffer full)\n",
+ last_seq + 1, packet_buffer.top().seq);
+ silence = true;
+ last_seq = packet_buffer.top().seq - 1;
+ } else if (!packet_buffer.empty() &&
+ tdiff(packet_buffer.top().ts, now) > TIMEOUT_SEC) {
+ printf("Gave up waiting for packets [%d,%d> (timeout)\n",
last_seq + 1, packet_buffer.top().seq);
silence = true;
last_seq = packet_buffer.top().seq - 1;
}
+ // In case of restarts.
+ if (packet_buffer.empty() &&
+ seq < last_seq &&
+ tdiff(last_sent_packet, now) > 5.0) {
+ printf("No good data for five seconds, resetting sequence to %d\n", seq);
+ last_seq = seq - 1;
+ }
+
GREPacket packet;
packet.seq = seq;
packet.proto = proto;
packet.data = data;
+ packet.ts = now;
packet_buffer.push(packet);
while (!packet_buffer.empty() &&
sender->send_packet(proto, data, seq);
packet_buffer.pop();
last_seq = front_seq;
+ last_sent_packet = now;
if (!silence && !packet_buffer.empty()) {
printf("Reordering with packet buffer size %d: seq=%d new_front_seq=%d\n", int(packet_buffer.size()), front_seq, packet_buffer.top().seq);
silence = true;