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esp32_https_server/src/HTTPSConnection.cpp at master · sorianoas/esp32_https_server · GitHub
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HTTPSConnection.cpp
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HTTPSConnection.cpp
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#
include
"
HTTPSConnection.hpp
"
namespace
httpsserver
{
HTTPSConnection::HTTPSConnection
(ResourceResolver * resResolver):
HTTPConnection
(resResolver) {
_ssl =
NULL
;
}
HTTPSConnection::~HTTPSConnection
() {
//
Close the socket
closeConnection
();
}
bool
HTTPSConnection::isSecure
() {
return
true
;
}
/*
*
* Initializes the connection from a server socket.
*
* The call WILL BLOCK if accept(serverSocketID) blocks. So use select() to check for that in advance.
*/
int
HTTPSConnection::initialize
(
int
serverSocketID,
SSL_CTX
* sslCtx, HTTPHeaders *defaultHeaders) {
if
(_connectionState ==
STATE_UNDEFINED
) {
//
Let the base class connect the plain tcp socket
int
resSocket =
HTTPConnection::initialize
(serverSocketID, defaultHeaders);
//
Build up SSL Connection context if the socket has been created successfully
if
(resSocket >=
0
) {
_ssl =
SSL_new
(sslCtx);
if
(_ssl) {
//
Bind SSL to the socket
int
success =
SSL_set_fd
(_ssl, resSocket);
if
(success) {
//
Perform the handshake
success =
SSL_accept
(_ssl);
if
(success) {
return
resSocket;
}
else
{
HTTPS_LOGE
(
"
SSL_accept failed. Aborting handshake. FID=%d
"
, resSocket);
}
}
else
{
HTTPS_LOGE
(
"
SSL_set_fd failed. Aborting handshake. FID=%d
"
, resSocket);
}
}
else
{
HTTPS_LOGE
(
"
SSL_new failed. Aborting handshake. FID=%d
"
, resSocket);
}
}
else
{
HTTPS_LOGE
(
"
Could not accept() new connection. FID=%d
"
, resSocket);
}
_connectionState =
STATE_ERROR
;
_clientState =
CSTATE_ACTIVE
;
//
This will only be called if the connection could not be established and cleanup
//
variables like _ssl etc.
closeConnection
();
}
//
Error: The connection has already been established or could not be established
return
-
1
;
}
void
HTTPSConnection::closeConnection
() {
//
FIXME: Copy from HTTPConnection, could be done better probably
if
(_connectionState !=
STATE_ERROR
&& _connectionState !=
STATE_CLOSED
) {
//
First call to closeConnection - set the timestamp to calculate the timeout later on
if
(_connectionState !=
STATE_CLOSING
) {
_shutdownTS =
millis
();
}
//
Set the connection state to closing. We stay in closing as long as SSL has not been shutdown
//
correctly
_connectionState =
STATE_CLOSING
;
}
//
Try to tear down SSL while we are in the _shutdownTS timeout period or if an error occurred
if
(_ssl) {
if
(_connectionState ==
STATE_ERROR
||
SSL_shutdown
(_ssl) ==
0
) {
//
SSL_shutdown will return 1 as soon as the client answered with close notify
//
This means we are safe to close the socket
SSL_free
(_ssl);
_ssl =
NULL
;
}
else
if
(_shutdownTS +
HTTPS_SHUTDOWN_TIMEOUT
<
millis
()) {
//
The timeout has been hit, we force SSL shutdown now by freeing the context
SSL_free
(_ssl);
_ssl =
NULL
;
HTTPS_LOGW
(
"
SSL_shutdown did not receive close notification from the client
"
);
_connectionState =
STATE_ERROR
;
}
}
//
If SSL has been brought down, close the socket
if
(!_ssl) {
HTTPConnection::closeConnection
();
}
}
size_t
HTTPSConnection::writeBuffer
(byte* buffer,
size_t
length) {
return
SSL_write
(_ssl, buffer, length);
}
size_t
HTTPSConnection::readBytesToBuffer
(byte* buffer,
size_t
length) {
return
SSL_read
(_ssl, buffer, length);
}
size_t
HTTPSConnection::pendingByteCount
() {
return
SSL_pending
(_ssl);
}
bool
HTTPSConnection::canReadData
() {
return
HTTPConnection::canReadData
() || (
SSL_pending
(_ssl) >
0
);
}
}
/*
namespace httpsserver
*/
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