void ConnectionDescriptor::_DispatchInboundData (const char *buffer, int size)
{
#ifdef WITH_SSL
if (SslBox) {
SslBox->PutCiphertext (buffer, size);
int s;
char B [2048];
while ((s = SslBox->GetPlaintext (B, sizeof(B) - 1)) > 0) {
_CheckHandshakeStatus();
B [s] = 0;
_GenericInboundDispatch(B, s);
}
// If our SSL handshake had a problem, shut down the connection.
if (s == -2) {
ScheduleClose(false);
return;
}
_CheckHandshakeStatus();
_DispatchCiphertext();
}
else {
_GenericInboundDispatch(buffer, size);
}
#endif
#ifdef WITHOUT_SSL
_GenericInboundDispatch(buffer, size);
#endif
}
void DatagramDescriptor::Read()
{
int sd = GetSocket();
assert (sd != INVALID_SOCKET);
LastActivity = MyEventMachine->GetCurrentLoopTime();
// This is an extremely large read buffer.
// In many cases you wouldn't expect to get any more than 4K.
char readbuffer [16 * 1024];
for (int i=0; i < 10; i++) {
// Don't read just one buffer and then move on. This is faster
// if there is a lot of incoming.
// But don't read indefinitely. Give other sockets a chance to run.
// NOTICE, we're reading one less than the buffer size.
// That's so we can put a guard byte at the end of what we send
// to user code.
struct sockaddr_in sin;
socklen_t slen = sizeof (sin);
memset (&sin, 0, slen);
int r = recvfrom (sd, readbuffer, sizeof(readbuffer) - 1, 0, (struct sockaddr*)&sin, &slen);
//cerr << "<R:" << r << ">";
// In UDP, a zero-length packet is perfectly legal.
if (r >= 0) {
// Add a null-terminator at the the end of the buffer
// that we will send to the callback.
// DO NOT EVER CHANGE THIS. We want to explicitly allow users
// to be able to depend on this behavior, so they will have
// the option to do some things faster. Additionally it's
// a security guard against buffer overflows.
readbuffer [r] = 0;
// Set up a "temporary" return address so that callers can "reply" to us
// from within the callback we are about to invoke. That means that ordinary
// calls to "send_data_to_connection" (which is of course misnamed in this
// case) will result in packets being sent back to the same place that sent
// us this one.
// There is a different call (evma_send_datagram) for cases where the caller
// actually wants to send a packet somewhere else.
memset (&ReturnAddress, 0, sizeof(ReturnAddress));
memcpy (&ReturnAddress, &sin, slen);
_GenericInboundDispatch(readbuffer, r);
}
else {
// Basically a would-block, meaning we've read everything there is to read.
break;
}
}
}
void PipeDescriptor::Read()
{
int sd = GetSocket();
if (sd == INVALID_SOCKET) {
assert (!bReadAttemptedAfterClose);
bReadAttemptedAfterClose = true;
return;
}
LastIo = gCurrentLoopTime;
int total_bytes_read = 0;
char readbuffer [16 * 1024];
for (int i=0; i < 10; i++) {
// Don't read just one buffer and then move on. This is faster
// if there is a lot of incoming.
// But don't read indefinitely. Give other sockets a chance to run.
// NOTICE, we're reading one less than the buffer size.
// That's so we can put a guard byte at the end of what we send
// to user code.
// Use read instead of recv, which on Linux gives a "socket operation
// on nonsocket" error.
int r = read (sd, readbuffer, sizeof(readbuffer) - 1);
//cerr << "<R:" << r << ">";
if (r > 0) {
total_bytes_read += r;
// Add a null-terminator at the the end of the buffer
// that we will send to the callback.
// DO NOT EVER CHANGE THIS. We want to explicitly allow users
// to be able to depend on this behavior, so they will have
// the option to do some things faster. Additionally it's
// a security guard against buffer overflows.
readbuffer [r] = 0;
_GenericInboundDispatch(readbuffer, r);
}
else if (r == 0) {
break;
}
else {
// Basically a would-block, meaning we've read everything there is to read.
break;
}
}
if (total_bytes_read == 0) {
// If we read no data on a socket that selected readable,
// it generally means the other end closed the connection gracefully.
ScheduleClose (false);
//bCloseNow = true;
}
}
void KeyboardDescriptor::Read()
{
char c;
(void)read (GetSocket(), &c, 1);
_GenericInboundDispatch(&c, 1);
}