(ws) add a dnslookup sub-command, to get the ip address of a remote host

CMakeLists.txt

@@ -129,9 +129,6 @@ if (USE_TLS)
     elseif (APPLE AND NOT USE_OPEN_SSL)
         list( APPEND IXWEBSOCKET_HEADERS ixwebsocket/IXSocketAppleSSL.h)
         list( APPEND IXWEBSOCKET_SOURCES ixwebsocket/IXSocketAppleSSL.cpp)
-    elseif (WIN32 AND NOT USE_OPEN_SSL)
-        list( APPEND IXWEBSOCKET_HEADERS ixwebsocket/IXSocketSChannel.h)
-        list( APPEND IXWEBSOCKET_SOURCES ixwebsocket/IXSocketSChannel.cpp)
     else()
         set(USE_OPEN_SSL ON)
         list( APPEND IXWEBSOCKET_HEADERS ixwebsocket/IXSocketOpenSSL.h)

docker/Dockerfile.alpine

@@ -21,6 +21,7 @@ FROM alpine:3.11 as runtime
 
 RUN apk add --no-cache libstdc++
 RUN apk add --no-cache strace
+RUN apk add --no-cache gdb
 
 RUN addgroup -S app && adduser -S -G app app 
 COPY --chown=app:app --from=build /usr/local/bin/ws /usr/local/bin/ws
@@ -36,4 +37,3 @@ WORKDIR /home/app
 
 ENTRYPOINT ["ws"]
 EXPOSE 8008
-C

docs/CHANGELOG.md

@@ -1,6 +1,14 @@
 # Changelog
 All changes to this project will be documented in this file.
 
+## [7.9.6] - 2020-01-22
+
+(ws) add a dnslookup sub-command, to get the ip address of a remote host
+
+## [7.9.5] - 2020-01-14
+
+(windows) fix #144, get rid of stubbed/un-implemented windows schannel ssl backend
+
 ## [7.9.4] - 2020-01-12
 
 (openssl + mbedssl) fix #140, can send large files with ws send over ssl / still broken with apple ssl

ixwebsocket/IXSocketFactory.cpp

@@ -14,8 +14,6 @@
 #include "IXSocketOpenSSL.h"
 #elif __APPLE__
 #include "IXSocketAppleSSL.h"
-#elif defined(_WIN32)
-#include "IXSocketSChannel.h"
 #endif
 
 #else
@@ -46,8 +44,6 @@ namespace ix
             socket = std::make_shared<SocketMbedTLS>(tlsOptions, fd);
 #elif defined(IXWEBSOCKET_USE_OPEN_SSL)
             socket = std::make_shared<SocketOpenSSL>(tlsOptions, fd);
-#elif defined(_WIN32)
-            socket = std::make_shared<SocketSChannel>(tlsOptions, fd);
 #elif defined(__APPLE__)
             socket = std::make_shared<SocketAppleSSL>(tlsOptions, fd);
 #endif

ixwebsocket/IXSocketSChannel.cpp

@@ -1,103 +0,0 @@
-/*
- *  IXSocketSChannel.cpp
- *  Author: Benjamin Sergeant
- *  Copyright (c) 2018 Machine Zone, Inc. All rights reserved.
- *
- *  See https://docs.microsoft.com/en-us/windows/desktop/WinSock/using-secure-socket-extensions
- *
- *  https://github.com/pauldotknopf/WindowsSDK7-Samples/blob/master/netds/winsock/securesocket/stcpclient/tcpclient.c
- *
- *  This is the right example to look at:
- *  https://www.codeproject.com/Articles/1000189/A-Working-TCP-Client-and-Server-With-SSL
- *
- *  Similar code is available from this git repo
- *  https://github.com/david-maw/StreamSSL
- */
-#include "IXSocketSChannel.h"
-
-#ifdef _WIN32
-#include <WS2tcpip.h>
-#include <WinSock2.h>
-#include <basetsd.h>
-#include <io.h>
-#include <schannel.h>
-#include <ws2def.h>
-
-#define WIN32_LEAN_AND_MEAN
-
-#ifndef UNICODE
-#define UNICODE
-#endif
-
-#include <mstcpip.h>
-#include <ntdsapi.h>
-#include <rpc.h>
-#include <stdio.h>
-#include <tchar.h>
-#include <winsock2.h>
-#include <ws2tcpip.h>
-
-#include <windows.h>
-
-#define RECV_DATA_BUF_SIZE 256
-
-// Link with ws2_32.lib
-#pragma comment(lib, "Ws2_32.lib")
-
-// link with fwpuclnt.lib for Winsock secure socket extensions
-#pragma comment(lib, "fwpuclnt.lib")
-
-// link with ntdsapi.lib for DsMakeSpn function
-#pragma comment(lib, "ntdsapi.lib")
-
-// The following function assumes that Winsock
-// has already been initialized
-
-
-#else
-#error("This file should only be built on Windows")
-#endif
-
-namespace ix
-{
-    SocketSChannel::SocketSChannel()
-    {
-        ;
-    }
-
-    SocketSChannel::~SocketSChannel()
-    {
-    }
-
-    bool SocketSChannel::connect(const std::string& host, int port, std::string& errMsg)
-    {
-        return Socket::connect(host, port, errMsg, nullptr);
-    }
-
-
-    void SocketSChannel::secureSocket()
-    {
-        // there will be a lot to do here ...
-    }
-
-    void SocketSChannel::close()
-    {
-        Socket::close();
-    }
-
-    ssize_t SocketSChannel::send(char* buf, size_t nbyte)
-    {
-        return Socket::send(buf, nbyte);
-    }
-
-    ssize_t SocketSChannel::send(const std::string& buffer)
-    {
-        return Socket::send(buffer);
-    }
-
-    ssize_t SocketSChannel::recv(void* buf, size_t nbyte)
-    {
-        return Socket::recv(buf, nbyte);
-    }
-
-} // namespace ix

ixwebsocket/IXSocketSChannel.h

@@ -1,32 +0,0 @@
-/*
- *  IXSocketSChannel.h
- *  Author: Benjamin Sergeant
- *  Copyright (c) 2017-2018 Machine Zone, Inc. All rights reserved.
- */
-
-#pragma once
-
-#include "IXSocket.h"
-
-namespace ix
-{
-    class SocketSChannel final : public Socket
-    {
-    public:
-        SocketSChannel();
-        ~SocketSChannel();
-
-        virtual bool connect(const std::string& host, int port, std::string& errMsg) final;
-        virtual void close() final;
-
-        // The important override
-        virtual void secureSocket() final;
-
-        virtual ssize_t send(char* buffer, size_t length) final;
-        virtual ssize_t send(const std::string& buffer) final;
-        virtual ssize_t recv(void* buffer, size_t length) final;
-
-    private:
-    };
-
-} // namespace ix

ixwebsocket/IXWebSocketVersion.h

@@ -6,4 +6,4 @@
 
 #pragma once
 
-#define IX_WEBSOCKET_VERSION "7.9.4"
+#define IX_WEBSOCKET_VERSION "7.9.6"

ws/CMakeLists.txt

@@ -65,6 +65,7 @@ add_executable(ws
   ws_autobahn.cpp
   ws_proxy_server.cpp
   ws_sentry_minidump_upload.cpp
+  ws_dns_lookup.cpp
   ws.cpp)
 
 target_link_libraries(ws ixsnake)

ws/ws.cpp

@@ -338,6 +338,9 @@ int main(int argc, char** argv)
     minidumpApp->add_option("--key", key, "Sentry Key")->required();
     minidumpApp->add_flag("-v", verbose, "Verbose");
 
+    CLI::App* dnsLookupApp = app.add_subcommand("dnslookup", "DNS lookup");
+    dnsLookupApp->add_option("host", hostname, "Hostname")->required();
+
     CLI11_PARSE(app, argc, argv);
 
     // pid file handling
@@ -509,6 +512,10 @@ int main(int argc, char** argv)
     {
         ret = ix::ws_sentry_minidump_upload(metadata, minidump, project, key, verbose);
     }
+    else if (app.got_subcommand("dnslookup"))
+    {
+        ret = ix::ws_dns_lookup(hostname);
+    }
     else if (version)
     {
         spdlog::info("ws {}", ix::userAgent());

ws/ws.h

@@ -163,4 +163,6 @@ namespace ix
                                   const std::string& project,
                                   const std::string& key,
                                   bool verbose);
+
+    int ws_dns_lookup(const std::string& hostname);
 } // namespace ix

ws/ws_dns_lookup.cpp

@@ -0,0 +1,34 @@
+/*
+ *  ws_dns_lookup.cpp
+ *  Author: Benjamin Sergeant
+ *  Copyright (c) 2020 Machine Zone, Inc. All rights reserved.
+ */
+
+#include <atomic>
+#include <spdlog/spdlog.h>
+#include <sstream>
+#include <ixwebsocket/IXNetSystem.h>
+#include <ixwebsocket/IXDNSLookup.h>
+
+
+namespace ix
+{
+    int ws_dns_lookup(const std::string& hostname)
+    {
+        auto dnsLookup = std::make_shared<DNSLookup>(hostname, 80);
+
+        std::string errMsg;
+        struct addrinfo* res;
+
+        res = dnsLookup->resolve(errMsg, [] { return false; });
+
+        auto addr = res->ai_addr;
+
+        char str[INET_ADDRSTRLEN];
+        inet_ntop(AF_INET, &addr, str, INET_ADDRSTRLEN);
+
+        spdlog::info("host: {} ip: {}", hostname, str);
+
+        return 0;
+    }
+} // namespace ix