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echoclient.cpp
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/*
* snode.c - a slim toolkit for network communication
* Copyright (C) 2020, 2021, 2022 Volker Christian <[email protected]>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef DOXYGEN_SHOULD_SKIP_THIS
#include "core/SNodeC.h" // for SNodeC
#include "log/Logger.h" // for Writer, Storage
#include "web/http/legacy/in/Client.h" // for Client, Client<>...
#include "web/http/tls/in/Client.h" // for Client, Client<>...
#include <cstddef>
#include <openssl/ssl.h> // IWYU pragma: keep
#include <openssl/x509v3.h>
#include <string>
// IWYU pragma: no_include <openssl/asn1.h>
// IWYU pragma: no_include <openssl/crypto.h>
// IWYU pragma: no_include <openssl/obj_mac.h>
// IWYU pragma: no_include <openssl/ssl3.h>
// IWYU pragma: no_include <openssl/types.h>
// IWYU pragma: no_include <openssl/x509.h>
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
int main(int argc, char* argv[]) {
core::SNodeC::init(argc, argv);
{
using EchoClientLegacy = web::http::legacy::in::Client;
using SocketConnectionLegacy = EchoClientLegacy::SocketConnection;
using Request = EchoClientLegacy::Request;
using Response = EchoClientLegacy::Response;
using SocketAddressLegacy = EchoClientLegacy::SocketAddress;
EchoClientLegacy legacyClient(
"legacy",
[](const SocketConnectionLegacy* socketConnection) -> void {
VLOG(0) << "OnConnect";
VLOG(0) << "\tServer: " + socketConnection->getRemoteAddress().toString();
VLOG(0) << "\tClient: " + socketConnection->getLocalAddress().toString();
},
[](const SocketConnectionLegacy* socketConnection) -> void {
VLOG(0) << "OnConnected";
VLOG(0) << "\tServer: " + socketConnection->getRemoteAddress().toString();
VLOG(0) << "\tClient: " + socketConnection->getLocalAddress().toString();
},
[](const SocketConnectionLegacy* socketConnection) -> void {
VLOG(0) << "OnDisconnect";
VLOG(0) << "\tServer: " + socketConnection->getRemoteAddress().toString();
VLOG(0) << "\tClient: " + socketConnection->getLocalAddress().toString();
},
[](const std::shared_ptr<Request>& request) -> void {
VLOG(0) << "OnRequestBegin";
request->set("Sec-WebSocket-Protocol", "test, echo");
request->upgrade(
"/ws/", "websocket", [](const std::shared_ptr<Request>& req, const std::shared_ptr<Response>& res) -> void {
VLOG(1) << "OnResponse";
VLOG(2) << " Status:";
VLOG(2) << " " << res->httpVersion << " " << res->statusCode << " " << res->reason;
VLOG(2) << " Headers:";
for (const auto& [field, value] : res->headers) {
VLOG(2) << " " << field + " = " + value;
}
VLOG(2) << " Cookies:";
for (const auto& [name, cookie] : res->cookies) {
VLOG(2) << " " + name + " = " + cookie.getValue();
for (const auto& [option, value] : cookie.getOptions()) {
VLOG(2) << " " + option + " = " + value;
}
}
req->upgrade(res,
[subProtocolsRequested = req->header("Upgrade"),
&subProtocol = res->headers["upgrade"]](const std::string& name) -> void {
if (!name.empty()) {
VLOG(1)
<< "Successful upgrade to '" << subProtocol << "' requested: " << subProtocolsRequested;
} else {
VLOG(1) << "Can not upgrade to '" << subProtocol << "' requested: " << subProtocolsRequested;
}
});
});
},
[](const std::shared_ptr<Request>& request) -> void {
VLOG(0) << "OnRequestEnd";
});
legacyClient.connect("localhost", 8080, [](const SocketAddressLegacy& socketAddress, const core::socket::State& state) -> void {
switch (state) {
case core::socket::State::OK:
VLOG(1) << "legacy: connected to '" << socketAddress.toString() << "': " << state.what();
break;
case core::socket::State::DISABLED:
VLOG(1) << "legacy: disabled";
break;
case core::socket::State::ERROR:
VLOG(1) << "legacy: " << socketAddress.toString() << ": non critical error occurred";
VLOG(1) << " " << state.what();
break;
case core::socket::State::FATAL:
VLOG(1) << "legacy: " << socketAddress.toString() << ": critical error occurred";
VLOG(1) << " " << state.what();
break;
}
}); // Connection:keep-alive\r\n\r\n"
using EchoClientTls = web::http::tls::in::Client;
using SocketConnectionTLS = EchoClientTls::SocketConnection;
using Request = EchoClientTls::Request;
using Response = EchoClientTls::Response;
using SocketAddressTLS = EchoClientTls::SocketAddress;
EchoClientTls tlsClient(
"tls",
[](const SocketConnectionTLS* socketConnection) -> void {
VLOG(0) << "OnConnect";
VLOG(0) << "\tServer: " + socketConnection->getRemoteAddress().toString();
VLOG(0) << "\tClient: " + socketConnection->getLocalAddress().toString();
},
[](const SocketConnectionTLS* socketConnection) -> void {
VLOG(0) << "OnConnected";
X509* server_cert = SSL_get_peer_certificate(socketConnection->getSSL());
if (server_cert != nullptr) {
long verifyErr = SSL_get_verify_result(socketConnection->getSSL());
VLOG(0) << " Server certificate: " + std::string(X509_verify_cert_error_string(verifyErr));
char* str = X509_NAME_oneline(X509_get_subject_name(server_cert), nullptr, 0);
VLOG(0) << " Subject: " + std::string(str);
OPENSSL_free(str);
str = X509_NAME_oneline(X509_get_issuer_name(server_cert), nullptr, 0);
VLOG(0) << " Issuer: " + std::string(str);
OPENSSL_free(str);
// We could do all sorts of certificate verification stuff here
// before deallocating the certificate.
GENERAL_NAMES* subjectAltNames =
static_cast<GENERAL_NAMES*>(X509_get_ext_d2i(server_cert, NID_subject_alt_name, nullptr, nullptr));
int32_t altNameCount = sk_GENERAL_NAME_num(subjectAltNames);
VLOG(0) << " Subject alternative name count: " << altNameCount;
for (int32_t i = 0; i < altNameCount; ++i) {
GENERAL_NAME* generalName = sk_GENERAL_NAME_value(subjectAltNames, i);
if (generalName->type == GEN_URI) {
std::string subjectAltName =
std::string(reinterpret_cast<const char*>(ASN1_STRING_get0_data(generalName->d.uniformResourceIdentifier)),
static_cast<std::size_t>(ASN1_STRING_length(generalName->d.uniformResourceIdentifier)));
VLOG(0) << " SAN (URI): '" + subjectAltName;
} else if (generalName->type == GEN_DNS) {
std::string subjectAltName =
std::string(reinterpret_cast<const char*>(ASN1_STRING_get0_data(generalName->d.dNSName)),
static_cast<std::size_t>(ASN1_STRING_length(generalName->d.dNSName)));
VLOG(0) << " SAN (DNS): '" + subjectAltName;
} else {
VLOG(0) << " SAN (Type): '" + std::to_string(generalName->type);
}
}
sk_GENERAL_NAME_pop_free(subjectAltNames, GENERAL_NAME_free);
X509_free(server_cert);
} else {
VLOG(0) << " Server certificate: no certificate";
}
},
[](const SocketConnectionTLS* socketConnection) -> void {
VLOG(0) << "OnDisconnect";
VLOG(0) << "\tServer: " + socketConnection->getRemoteAddress().toString();
VLOG(0) << "\tClient: " + socketConnection->getLocalAddress().toString();
},
[](const std::shared_ptr<Request>& request) -> void {
VLOG(0) << "OnRequestBegin";
request->set("Sec-WebSocket-Protocol", "test, echo");
request->upgrade(
"/ws/", "websocket", [](const std::shared_ptr<Request>& req, const std::shared_ptr<Response>& res) -> void {
VLOG(1) << "OnResponse";
VLOG(2) << " Status:";
VLOG(2) << " " << res->httpVersion << " " << res->statusCode << " " << res->reason;
VLOG(2) << " Headers:";
for (const auto& [field, value] : res->headers) {
VLOG(2) << " " << field + " = " + value;
}
VLOG(2) << " Cookies:";
for (const auto& [name, cookie] : res->cookies) {
VLOG(2) << " " + name + " = " + cookie.getValue();
for (const auto& [option, value] : cookie.getOptions()) {
VLOG(2) << " " + option + " = " + value;
}
}
req->upgrade(res,
[subProtocolsRequested = req->header("Upgrade"),
&subProtocol = res->headers["upgrade"]](const std::string& name) -> void {
if (!name.empty()) {
VLOG(1)
<< "Successful upgrade to '" << subProtocol << "' requested: " << subProtocolsRequested;
} else {
VLOG(1) << "Can not upgrade to '" << subProtocol << "' requested: " << subProtocolsRequested;
}
});
});
},
[](const std::shared_ptr<Request>& request) -> void {
VLOG(0) << "OnRequestEnd";
});
tlsClient.connect("localhost", 8088, [](const SocketAddressTLS& socketAddress, const core::socket::State& state) -> void {
switch (state) {
case core::socket::State::OK:
VLOG(1) << "legacy: connected to '" << socketAddress.toString() << "': " << state.what();
break;
case core::socket::State::DISABLED:
VLOG(1) << "legacy: disabled";
break;
case core::socket::State::ERROR:
VLOG(1) << "legacy: " << socketAddress.toString() << ": non critical error occurred";
VLOG(1) << " " << state.what();
break;
case core::socket::State::FATAL:
VLOG(1) << "legacy: " << socketAddress.toString() << ": critical error occurred";
VLOG(1) << " " << state.what();
break;
}
}); // Connection:keep-alive\r\n\r\n"
}
return core::SNodeC::start();
}