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[WIP] fixed a million bugs and one potential one

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This commit is contained in:
dongresource 2020-12-04 23:02:15 +01:00
parent 721b3f440f
commit 3a2b488f33
1 changed files with 26 additions and 10 deletions
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36
src/CNProtocol.cpp
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@ -163,6 +163,7 @@ void CNSocket::setActiveKey(ACTIVEKEY key) {
void CNSocket::step() { void CNSocket::step() {
// read step // read step
// XXX NOTE: we must not recv() twice without a poll() inbetween
if (readSize <= 0) { if (readSize <= 0) {
// we aren't reading a packet yet, try to start looking for one // we aren't reading a packet yet, try to start looking for one
int recved = recv(sock, (buffer_t*)readBuffer, sizeof(int32_t), 0); int recved = recv(sock, (buffer_t*)readBuffer, sizeof(int32_t), 0);
@ -183,8 +184,7 @@ void CNSocket::step() {
return; return;
} }
} }
else if (readSize > 0 && readBufferIndex < readSize) {
if (readSize > 0 && readBufferIndex < readSize) {
// read until the end of the packet! (or at least try too) // read until the end of the packet! (or at least try too)
int recved = recv(sock, (buffer_t*)(readBuffer + readBufferIndex), readSize - readBufferIndex, 0); int recved = recv(sock, (buffer_t*)(readBuffer + readBufferIndex), readSize - readBufferIndex, 0);
if (!SOCKETERROR(recved)) if (!SOCKETERROR(recved))
@ -196,7 +196,7 @@ void CNSocket::step() {
} }
} }
if (activelyReading && readBufferIndex - readSize <= 0) { if (activelyReading && readBufferIndex >= readSize) {
// decrypt readBuffer and copy to CNPacketData // decrypt readBuffer and copy to CNPacketData
CNSocketEncryption::decryptData((uint8_t*)&readBuffer, (uint8_t*)(&EKey), readSize); CNSocketEncryption::decryptData((uint8_t*)&readBuffer, (uint8_t*)(&EKey), readSize);
@ -255,7 +255,7 @@ CNServer::CNServer() {};
CNServer::CNServer(uint16_t p): port(p) {} CNServer::CNServer(uint16_t p): port(p) {}
void CNServer::start() { void CNServer::start() {
int nfds = 1; int nfds = 1, oldnfds;
struct pollfd fds[20]; // TODO: dynamically grow struct pollfd fds[20]; // TODO: dynamically grow
memset(&fds, 0, sizeof(fds)); memset(&fds, 0, sizeof(fds));
@ -280,9 +280,11 @@ void CNServer::start() {
terminate(0); terminate(0);
} }
oldnfds = nfds;
activeCrit.lock(); activeCrit.lock();
for (int i = 0; i < nfds && n > 0; i++) { for (int i = 0; i < oldnfds && n > 0; i++) {
if (fds[i].revents == 0) if (fds[i].revents == 0)
continue; // nothing in this one; don't decrement n continue; // nothing in this one; don't decrement n
@ -295,7 +297,7 @@ void CNServer::start() {
terminate(0); terminate(0);
} }
SOCKET newConnectionSocket = accept(sock, (struct sockaddr *)&(address), (socklen_t*)&(addressSize)); SOCKET newConnectionSocket = accept(sock, (struct sockaddr *)&address, (socklen_t*)&addressSize);
if (SOCKETINVALID(newConnectionSocket)) { if (SOCKETINVALID(newConnectionSocket)) {
n--; n--;
continue; continue;
@ -321,12 +323,17 @@ void CNServer::start() {
while (it != connections.end()) { while (it != connections.end()) {
CNSocket* cSock = *it; CNSocket* cSock = *it;
if (fds[i].fd != cSock->sock) if (fds[i].fd != cSock->sock) {
// not the socket we're looking for; check the next one
it++;
continue; continue;
}
// kill the socket on error // kill the socket on error
if (fds[i].revents & ~POLLIN) if (fds[i].revents & ~POLLIN) {
std::cout << "Killing socket at fds[" << i << "]\n";
cSock->kill(); cSock->kill();
}
if (cSock->isAlive()) { if (cSock->isAlive()) {
cSock->step(); cSock->step();
@ -339,9 +346,18 @@ void CNServer::start() {
nfds--; nfds--;
assert(nfds > 0); assert(nfds > 0);
fds[i].fd = fds[nfds].fd;
std::cout << "in thread " << (void*) this << " nfds is now " << nfds << std::endl; std::cout << "in thread " << (void*) this << " nfds is now " << nfds << std::endl;
// events are the same
if (i != nfds) {
// move the last entry to the new empty spot
fds[i].fd = fds[nfds].fd;
fds[i].events = fds[nfds].events; // redundant; events are always the same
}
// delete the entry
fds[nfds].fd = 0;
fds[nfds].events = 0;
break; break;
} }
} }