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Impl check timed-out packets

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Still WIP
This commit is contained in:
Stephen Seo 2019-08-27 12:42:43 +09:00
parent 7482fecb37
commit 418c088084
2 changed files with 45 additions and 5 deletions
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1
cpp_impl/src/UDPC_Defines.hpp
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@ -8,6 +8,7 @@
#define UDPC_SENT_PKTS_MAX_SIZE 33
#define UDPC_QUEUED_PKTS_MAX_SIZE 32
#define UDPC_GOOD_RTT_LIMIT_SEC 0.25f
#define UDPC_PACKET_TIMEOUT_SEC 1.0f
#define UDPC_ID_CONNECT 0x80000000
#define UDPC_ID_PING 0x40000000

49
cpp_impl/src/UDPConnection.cpp
View file

@ -41,7 +41,7 @@ UDPC::ConnectionData::ConnectionData()
void UDPC::ConnectionData::cleanupSentPkts() {
uint32_t id;
while(sentPkts.size() > UDPC_SENT_PKTS_MAX_SIZE) {
id = *((uint32_t*)(sentPkts.front().data + 8));
id = ntohl(*((uint32_t*)(sentPkts.front().data + 8)));
sentInfoMap.erase(id);
sentPkts.pop_front();
}
@ -401,7 +401,7 @@ void UDPC_update(void *ctx) {
pInfo.receiver = iter->first;
pInfo.senderPort = c->socketInfo.sin_port;
pInfo.receiverPort = iter->second.port;
*((uint32_t*)(pInfo.data + 8)) = iter->second.lseq - 1;
*((uint32_t*)(pInfo.data + 8)) = htonl(iter->second.lseq - 1);
iter->second.sentPkts.push_back(std::move(pInfo));
iter->second.cleanupSentPkts();
@ -471,7 +471,7 @@ void UDPC_update(void *ctx) {
sentPInfo.receiver = iter->first;
sentPInfo.senderPort = c->socketInfo.sin_port;
sentPInfo.receiverPort = iter->second.port;
*((uint32_t*)(sentPInfo.data + 8)) = iter->second.lseq - 1;
*((uint32_t*)(sentPInfo.data + 8)) = htonl(iter->second.lseq - 1);
iter->second.sentPkts.push_back(std::move(pInfo));
iter->second.cleanupSentPkts();
@ -566,7 +566,7 @@ void UDPC_update(void *ctx) {
// update rtt
for(auto sentIter = iter->second.sentPkts.rbegin(); sentIter != iter->second.sentPkts.rend(); ++sentIter) {
uint32_t id = *((uint32_t*)(sentIter->data + 8));
uint32_t id = ntohl(*((uint32_t*)(sentIter->data + 8)));
if(id == rseq) {
auto sentInfoIter = iter->second.sentInfoMap.find(id);
assert(sentInfoIter != iter->second.sentInfoMap.end()
@ -586,7 +586,46 @@ void UDPC_update(void *ctx) {
}
iter->second.received = now;
// TODO impl check pkt timeout
// check pkt timeout
--rseq;
for(; ack != 0; ack = ack << 1) {
if((ack & 0x80000000) != 0) {
--rseq;
continue;
}
// pkt not received yet, find it in sent to check if it timed out
for(auto sentIter = iter->second.sentPkts.rbegin(); sentIter != iter->second.sentPkts.rend(); ++sentIter) {
uint32_t sentID = ntohl(*((uint32_t*)(sentIter->data + 8)));
if(sentID == rseq) {
if((sentIter->flags & 0x4) != 0 || (sentIter->flags & 0x8) != 0) {
// already resent or not rec-checked pkt
break;
}
auto sentInfoIter = iter->second.sentInfoMap.find(sentID);
assert(sentInfoIter != iter->second.sentInfoMap.end()
&& "Every entry in sentPkts must have a corresponding entry in sentInfoMap");
float seconds = UDPC::durationToFSec(sentInfoIter->second->sentTime, now);
if(seconds > UDPC_PACKET_TIMEOUT_SEC) {
if(sentIter->dataSize <= 20) {
// TODO log error: timed out packet has no data
sentIter->flags |= 0x8;
break;
}
UDPC_PacketInfo resendingData;
resendingData.dataSize = sentIter->dataSize - 20;
std::memcpy(resendingData.data, sentIter->data + 20, resendingData.dataSize);
resendingData.flags = 0;
iter->second.priorityPkts.push(resendingData);
}
break;
}
}
--rseq;
}
// TODO impl
}