Merge ccdecfd832 into 5f1ed7363b

Added a tip about an alternative Docker image with Helm chart support.

.dockerignore

@@ -0,0 +1,73 @@
+# Exclude top-level dirs not needed for build
+/bin/
+/bin64/
+/build/
+/cfg/
+/cmake/
+/CMakeFiles/
+/debian/
+/doc/
+/man/
+
+# Build artifacts
+**/*.o
+**/*.obj
+**/*.so
+**/*.dll
+**/*.exe
+**/*.exp
+**/*.lib
+**/*.pdb
+**/*.ilk
+**/*.idb
+**/*.err
+**/*.ld.so
+**/*.dSYM
+**/*.var
+build*/
+buildlinux.sh
+tmp/
+
+# macOS
+.DS_Store
+
+# Editor / IDE
+**/*.swp
+**/*.swo
+**/*~
+**/*.bak
+**/*.tmp
+**/*.log
+.project
+.cproject
+.classpath
+.settings/
+.vscode/
+.idea/
+
+# Git
+.git
+.gitignore
+
+# Claude / docs
+CLAUDE.md
+.claude/
+
+# Generated version files
+version
+version.c
+version.sh
+verfile.sh
+
+# Local config / keys
+**/*.key
+**/*.pem
+**/*.pfx
+3proxy.cfg
+3proxy-ssl.cfg
+3proxy-pcre.cfg
+
+# Misc
+res
+3proxy.res
+copytgz.sh

.github/workflows/docker-test.yml

@@ -0,0 +1,35 @@
+name: Build Docker images (test, no publish)
+
+on:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    name: Build ${{ matrix.file }} (${{ matrix.platform }})
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        file: [Dockerfile.minimal, Dockerfile.busybox, Dockerfile.full]
+        platform: [linux/amd64, linux/arm64]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v4
+
+      - name: Build image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ${{ matrix.file }}
+          platforms: ${{ matrix.platform }}
+          push: false
+          load: ${{ matrix.platform == 'linux/amd64' }}

.gitignore

@@ -270,4 +270,5 @@ bin/3proxy_socks
 bin/3proxy_tcppm
 bin/3proxy_tlspr
 bin/3proxy_udppm
-build*/*
+build*/*
+testcerts/

Dockerfile.busybox

@@ -1,4 +1,5 @@
-# 3proxy.full is fully functional 3proxy build based on busybox:glibc
+# 3proxy.busybox is fully functional 3proxy build based on busybox:musl
+# built against wolfSSL and PCRE2.
 #
 # Examples are for podman, for docker change 'podman' to 'docker'
 #
@@ -19,11 +20,27 @@
 # configuration is supported for compatibility only.
 
 
-FROM docker.io/gcc AS buildenv
+FROM docker.io/alpine:latest AS wolfssl
+RUN apk add --no-cache build-base curl autoconf automake libtool
+RUN TAG=$(curl -s https://api.github.com/repos/wolfSSL/wolfssl/releases/latest \
+          | sed -n 's/.*"tag_name": *"\([^"]*\)".*/\1/p') && \
+    echo "wolfssl tag: $TAG" && \
+    curl -sL https://api.github.com/repos/wolfSSL/wolfssl/tarball/$TAG -o /tmp/w.tar.gz && \
+    mkdir /src && tar -xzf /tmp/w.tar.gz -C /src --strip-components=1 && \
+    cd /src && \
+    autoreconf -i && \
+    ./configure --enable-opensslextra --enable-opensslall --enable-certgen \
+                --enable-tls13 --enable-sni --enable-session-ticket \
+                --enable-static --disable-shared --prefix=/usr/local && \
+    make -j$(nproc) && make install
+
+FROM docker.io/alpine:latest AS buildenv
+RUN apk add --no-cache gcc make musl-dev pcre2-dev
+COPY --from=wolfssl /usr/local /usr/local
 COPY . 3proxy
-RUN cd 3proxy &&\
+RUN cd 3proxy && mkdir -p bin &&\
- apt --assume-yes update && apt --assume-yes install libssl-dev libpcre2-dev &&\
+ make -f Makefile.Linux LIBSTATIC=true PAM_CHECK=false WOLFSSL_CHECK=true \
- make -f Makefile.Linux LIBSTATIC=true PAM_CHECK=false &&\
+      EXTRA_LDFLAGS="-L/usr/local/lib" &&\
  strip bin/3proxy &&\
  strip bin/*so &&\
  mkdir /dist &&\
@@ -42,11 +59,9 @@ RUN cd /dist &&\
  ln -s /lib lib64 &&\
  ln -s /lib usr/lib &&\
  ln -s /lib usr/lib64
-RUN cp /lib/ld-*.so.* /dist/usr/local/3proxy/libexec || true
+RUN cp /lib/ld-musl-*.so.* /dist/usr/local/3proxy/libexec || true
-RUN cp /lib64/ld-*.so.* /dist/usr/local/3proxy/libexec || true
-RUN cp "/lib/`gcc -dumpmachine`"/libdl.so.* /dist/usr/local/3proxy/libexec
 
-FROM docker.io/busybox:glibc
+FROM docker.io/busybox:musl
 COPY --from=buildenv /dist /
-RUN ln -sf /usr/local/3proxy/libexec/* /lib/ && cd /usr/local/3proxy/ && ln -s libexec lib && ln -s libexec lib64 && mkdir usr && ln -s libexec usr/lib && ln -s libexec usr//lib64
+RUN mkdir -p /lib /lib64 && ln -sf /usr/local/3proxy/libexec/* /lib/ && cd /usr/local/3proxy/ && ln -s libexec lib && ln -s libexec lib64 && mkdir usr && ln -s libexec usr/lib && ln -s libexec usr/lib64
 CMD ["/bin/3proxy", "/etc/3proxy/3proxy.cfg"]

Dockerfile.full

@@ -23,6 +23,7 @@ FROM docker.io/gcc AS buildenv
 COPY . 3proxy
 RUN cd 3proxy &&\
  apt --assume-yes update && apt --assume-yes install libssl-dev libpcre2-dev &&\
+ mkdir -p bin &&\
  make -f Makefile.Linux LIBSTATIC=true PAM_CHECK=false &&\
  strip bin/3proxy &&\
  mkdir /dist &&\

Dockerfile.minimal

@@ -3,7 +3,8 @@
 #
 # Examples are for podman. For docker change 'podman' to 'docker'.
 #
-# This is busybox based docker with only 3proxy static executable.
+# This is a scratch-based docker with statically linked 3proxy executable
+# built against musl and wolfSSL.
 #
 # Limitations for minimal version:
 # no support for plugins and system resolver.
@@ -15,7 +16,7 @@
 #
 # Run example:
 #
-# podman run --read-only -i -p 3129:3129 --name 3proxy 3proxy.minimal  
+# podman run --read-only -i -p 3129:3129 --name 3proxy 3proxy.minimal
 #or
 # podman start -ai 3proxy
 #<nserver 8.8.8.8
@@ -25,12 +26,29 @@
 #<end
 #
 
-FROM docker.io/gcc AS buildenv
+FROM docker.io/alpine:latest AS wolfssl
+RUN apk add --no-cache build-base curl autoconf automake libtool
+RUN TAG=$(curl -s https://api.github.com/repos/wolfSSL/wolfssl/releases/latest \
+          | sed -n 's/.*"tag_name": *"\([^"]*\)".*/\1/p') && \
+    echo "wolfssl tag: $TAG" && \
+    curl -sL https://api.github.com/repos/wolfSSL/wolfssl/tarball/$TAG -o /tmp/w.tar.gz && \
+    mkdir /src && tar -xzf /tmp/w.tar.gz -C /src --strip-components=1 && \
+    cd /src && \
+    autoreconf -i && \
+    ./configure --enable-opensslextra --enable-opensslall --enable-certgen \
+                --enable-tls13 --enable-sni --enable-session-ticket \
+                --enable-static --disable-shared --prefix=/usr/local && \
+    make -j$(nproc) && make install
+
+FROM docker.io/alpine:latest AS buildenv
+RUN apk add --no-cache gcc make musl-dev
+COPY --from=wolfssl /usr/local /usr/local
 COPY . 3proxy
-RUN cd 3proxy &&\
+RUN cd 3proxy && mkdir -p bin &&\
- make -f Makefile.Linux STATIC=true &&\
+ make -f Makefile.Linux STATIC=true WOLFSSL_CHECK=true \
+      EXTRA_LDFLAGS="-L/usr/local/lib" &&\
  strip bin/3proxy
- 
+
 FROM scratch
 COPY --from=buildenv 3proxy/bin/3proxy /bin/3proxy
 CMD ["/bin/3proxy"]

Makefile.FreeBSD

@@ -15,7 +15,12 @@ CFLAGS += -c -fno-strict-aliasing -DFD_SETSIZE=4096 -DWITH_POLL -DWITH_UN
 COUT = -o 
 LN ?= ${CC}
 LDFLAGS ?= -O3 -flto
-LDFLAGS += -pthread -fno-strict-aliasing 
+LDFLAGS += -pthread -fno-strict-aliasing
+# Use EXTRA_CFLAGS/EXTRA_LDFLAGS to add flags from the make command line.
+# Setting CFLAGS or LDFLAGS there instead overrides every assignment in this
+# makefile, including the += above and the STATIC/LIBSTATIC handling below.
+CFLAGS += $(EXTRA_CFLAGS)
+LDFLAGS += $(EXTRA_LDFLAGS)
 # -lpthreads may be reuiured on some platforms instead of -pthreads
 # -ldl or -lld may be required for some platforms
 DCFLAGS ?= -fPIC

Makefile.Linux

@@ -16,6 +16,11 @@ LN ?= ${CC}
 DCFLAGS ?= -fPIC
 LDFLAGS ?= -O3 -flto
 LDFLAGS += -fno-strict-aliasing -pthread
+# Use EXTRA_CFLAGS/EXTRA_LDFLAGS to add flags from the make command line.
+# Setting CFLAGS or LDFLAGS there instead overrides every assignment in this
+# makefile, including the += above and the STATIC/LIBSTATIC handling below.
+CFLAGS += $(EXTRA_CFLAGS)
+LDFLAGS += $(EXTRA_LDFLAGS)
 DLFLAGS ?= -shared
 DLSUFFICS = .ld.so
 # -lpthreads may be reuqired on some platforms instead of -pthreads

Makefile.unix

@@ -18,6 +18,11 @@ COUT = -o
 LN ?= $(CC)
 LDFLAGS ?= -O3 -flto
 LDFLAGS += -pthread -fno-strict-aliasing
+# Use EXTRA_CFLAGS/EXTRA_LDFLAGS to add flags from the make command line.
+# Setting CFLAGS or LDFLAGS there instead overrides every assignment in this
+# makefile, including the += above and the STATIC/LIBSTATIC handling below.
+CFLAGS += $(EXTRA_CFLAGS)
+LDFLAGS += $(EXTRA_LDFLAGS)
 # -lpthreads may be reuqired on some platforms instead of -pthreads
 # -ldl or -lld may be required for some platforms
 DCFLAGS ?= -fPIC

Makefile.win

@@ -15,6 +15,11 @@ COUT = -o
 LN ?= $(CC)
 LDFLAGS ?= -O3 -flto
 LDFLAGS += -fno-strict-aliasing -mthreads
+# Use EXTRA_CFLAGS/EXTRA_LDFLAGS to add flags from the make command line.
+# Setting CFLAGS or LDFLAGS there instead overrides every assignment in this
+# makefile, including the += above and the STATIC/LIBSTATIC handling below.
+CFLAGS += $(EXTRA_CFLAGS)
+LDFLAGS += $(EXTRA_LDFLAGS)
 DLFLAGS ?= -shared
 DLSUFFICS = .dll
 LIBS += -lws2_32 -lodbc32 -ladvapi32 -luser32 -lbcrypt

README.md

@@ -18,6 +18,9 @@ https://github.com/3proxy/3proxy/releases
 https://hub.docker.com/r/3proxy/3proxy
 https://github.com/3proxy/3proxy/pkgs/container/3proxy
 
+> [!TIP]
+> An alternative Docker image (community-maintained) with support for configuration through environment variables and a ready-to-use Helm chart for Kubernetes can be found here: [tarampampam/3proxy-docker](https://github.com/tarampampam/3proxy-docker).
+
 ### Archive of old versions
 
 https://github.com/z3APA3A/3proxy-archive

man/3proxy.cfg.5

@@ -1178,6 +1178,19 @@ crash on request processing, try to set some positive value. You may start with
 stacksize 65536
 and then find the minimal value for the service to work. If you experience
 memory shortage, you can try to experiment with negative values.
+.br
+ With SQL logging (log &ODBC_string) the value is automatically raised to
+32768 if it is smaller, because ODBC drivers require more stack. A
+.BR stacksize
+command placed after the
+.BR log
+command overrides this.
+.br
+ The base stack size the value is added to is 49152. On FreeBSD, NetBSD,
+OpenBSD and DragonFly it is 65536, because libc functions such as vfprintf()
+called by syslog() use significantly more stack there. The result is never
+lowered below PTHREAD_STACK_MIN, so a large negative value can not disable
+the thread stack.
 
 .SH PLUGINS
 

src/3proxy.c

@@ -519,15 +519,10 @@ int WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPWSTR lpCmdLine, int
 #ifndef NORADIUS
   _3proxy_mutex_init(&rad_mutex);
 #endif
-#ifdef _WIN32
+  if(_3proxy_sem_init(conf.threadinit, 1, 1)){
-  conf.threadinit = CreateSemaphore(NULL, 1, 1, NULL);
-  if(!conf.threadinit){
     fprintf(stderr, "semaphore init failed\n");
     return 1;
   }
-#else
-  _3proxy_mutex_init(&conf.threadinit);
-#endif
 
 #ifdef WITH_SSL
   ssl_install();

src/common.c

@@ -134,12 +134,47 @@ int timeouts[12] = {
 	0
 };
 
-struct extparam conf = {
+#ifndef _WIN32
-#ifdef _WIN32
+/* PTHREAD_STACK_MIN is 128K on glibc/aarch64 and glibc/powerpc and may be
-	.threadinit = NULL,
+   a sysconf() call with _GNU_SOURCE. pthread_attr_setstacksize() fails with
-#else
+   EINVAL below it and the thread silently gets the 8M system default stack.
-	.threadinit = 0,
+ */
+size_t threadstacksize(int extra){
+	long size = BASESTACKSIZE + extra;
+
+	if(size < (long)PTHREAD_STACK_MIN) size = (long)PTHREAD_STACK_MIN;
+	return (size_t)size;
+}
+
+int _3proxy_sem_init_f(_3proxy_sem_t *sem, unsigned count, unsigned maxcount){
+	sem->count = count;
+	sem->maxcount = maxcount;
+	if(pthread_mutex_init(&sem->mutex, NULL)) return 1;
+	if(pthread_cond_init(&sem->cond, NULL)){
+		pthread_mutex_destroy(&sem->mutex);
+		return 1;
+	}
+	return 0;
+}
+
+void _3proxy_sem_lock_f(_3proxy_sem_t *sem){
+	pthread_mutex_lock(&sem->mutex);
+	while(!sem->count) pthread_cond_wait(&sem->cond, &sem->mutex);
+	sem->count--;
+	pthread_mutex_unlock(&sem->mutex);
+}
+
+void _3proxy_sem_unlock_f(_3proxy_sem_t *sem){
+	pthread_mutex_lock(&sem->mutex);
+	if(sem->count < sem->maxcount){
+		sem->count++;
+		pthread_cond_signal(&sem->cond);
+	}
+	pthread_mutex_unlock(&sem->mutex);
+}
 #endif
+
+struct extparam conf = {
 	.timeouts = timeouts,
 	.acl = NULL,
 	.conffile = NULL,

src/conf.c

@@ -156,7 +156,7 @@ int start_proxy_thread(struct child * chp){
 	if(h)CloseHandle(h);
 #else
 	pthread_attr_init(&pa);
-	pthread_attr_setstacksize(&pa,PTHREAD_STACK_MIN + (32768+conf.stacksize));
+	pthread_attr_setstacksize(&pa,threadstacksize(conf.stacksize));
 	pthread_attr_setdetachstate(&pa,PTHREAD_CREATE_DETACHED);
 	pthread_create(&thread, &pa, startsrv, (void *)chp);
 	pthread_attr_destroy(&pa);
@@ -301,7 +301,13 @@ static int h_external(int argc, unsigned char ** argv){
 }
 
 
-static int h_log(int argc, unsigned char ** argv){ 
+/* ODBC drivers require noticeably more stack than the file logger, raise
+   the client thread stack size unless a larger one is configured
+   explicitly. An explicit stacksize placed after the log command still wins.
+ */
+#define LOGSTACKSIZE 32768
+
+static int h_log(int argc, unsigned char ** argv){
 	unsigned char tmpbuf[8192];
 	int notchanged = 0;
 
@@ -330,6 +336,7 @@ static int h_log(int argc, unsigned char ** argv){
 #ifdef WITH_ODBC
 		else if(*argv[1]=='&'){
 			conf.logfunc = logsql;
+			if(conf.stacksize < LOGSTACKSIZE) conf.stacksize = LOGSTACKSIZE;
 			if(notchanged) return 0;
 			_3proxy_mutex_lock(&log_mutex);
 			close_sql();

src/libs/md4.h

@@ -48,6 +48,13 @@ typedef struct {
 #endif
 } MD4_CTX;
 
+/* Remap public symbols to a 3proxy-private namespace so the bundled
+   implementation does not collide with OpenSSL/libcrypto's MD4 symbols
+   when statically linked. Callers keep using the MD4_* names. */
+#define MD4_Init    _3proxy_MD4_Init
+#define MD4_Update  _3proxy_MD4_Update
+#define MD4_Final   _3proxy_MD4_Final
+
 extern void MD4_Init(MD4_CTX *ctx);
 extern void MD4_Update(MD4_CTX *ctx, const void *data, size_t size);
 extern void MD4_Final(unsigned char *result, MD4_CTX *ctx);

src/libs/md5.h

@@ -44,6 +44,13 @@ typedef struct {
 	MD5_u32plus block[16];
 } MD5_CTX;
 
+/* Remap public symbols to a 3proxy-private namespace so the bundled
+   implementation does not collide with OpenSSL/libcrypto's MD5 symbols
+   when statically linked. Callers keep using the MD5_* names. */
+#define MD5_Init    _3proxy_MD5_Init
+#define MD5_Update  _3proxy_MD5_Update
+#define MD5_Final   _3proxy_MD5_Final
+
 extern void MD5_Init(MD5_CTX *ctx);
 extern void MD5_Update(MD5_CTX *ctx, const void *data, unsigned long size);
 extern void MD5_Final(unsigned char *result, MD5_CTX *ctx);

src/proxy.h

@@ -112,6 +112,21 @@ void daemonize(void);
 #endif
 #endif
 
+/* Thread stack size, stacksize command value is added to it. BSD libc uses
+   significantly more stack, e.g. in vfprintf() called by syslog().
+ */
+#ifndef BASESTACKSIZE
+#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
+#define BASESTACKSIZE 65536
+#else
+#define BASESTACKSIZE 49152
+#endif
+#endif
+
+#ifndef _WIN32
+size_t threadstacksize(int extra);
+#endif
+
 #ifdef WITH_ODBC
 #ifndef _WIN32
 #include <sqltypes.h>
@@ -248,14 +263,18 @@ unsigned char* en64 (const unsigned char *in, unsigned char *out, int inlen);
 void tohex(unsigned char *in, unsigned char *out, int len);
 void fromhex(unsigned char *in, unsigned char *out, int len);
 
+extern _3proxy_sem_t udpinit;
 #ifdef _WIN32
-extern HANDLE udpinit;
+#define _3proxy_sem_init(x, count, maxcount) (((x) = CreateSemaphore(NULL, (count), (maxcount), NULL))? 0 : 1)
 #define _3proxy_sem_lock(x) WaitForSingleObject(x, INFINITE)
 #define _3proxy_sem_unlock(x) ReleaseSemaphore(x, 1, NULL)
 #else
-extern _3proxy_mutex_t udpinit;
+int _3proxy_sem_init_f(_3proxy_sem_t *sem, unsigned count, unsigned maxcount);
-#define _3proxy_sem_lock(x) pthread_mutex_lock(&x)
+void _3proxy_sem_lock_f(_3proxy_sem_t *sem);
-#define _3proxy_sem_unlock(x) pthread_mutex_unlock(&x)
+void _3proxy_sem_unlock_f(_3proxy_sem_t *sem);
+#define _3proxy_sem_init(x, count, maxcount) _3proxy_sem_init_f(&x, (count), (maxcount))
+#define _3proxy_sem_lock(x) _3proxy_sem_lock_f(&x)
+#define _3proxy_sem_unlock(x) _3proxy_sem_unlock_f(&x)
 #endif
 
 

src/proxymain.c

@@ -11,6 +11,18 @@
 #include <sched.h>
 #endif
 
+/* Child functions do not call each other, a child requesting redirection to
+   another child returns it instead of calling it, to keep the stack flat.
+   NULL is returned by the child which completed the request, it has already
+   released param and it must not be accessed after the call.
+ */
+void * childfunc(struct clientparam * param){
+ PROXYFUNC pf = param->srv->pf;
+
+ while(pf) pf = (PROXYFUNC)(*pf)(param);
+ return NULL;
+}
+
 #define param ((struct clientparam *) p)
 #ifdef _WIN32
 DWORD WINAPI threadfunc(LPVOID p) {
@@ -367,6 +379,7 @@ int MODULEMAINFUNC (int argc, char** argv){
 	if(!srv.udpbuf || !srv.udpbuf2) {
 #ifndef STDMAIN
 		haveerror = 2;
+		_3proxy_sem_unlock(conf.threadinit);
 #endif
 		return 11;
 	}
@@ -608,7 +621,6 @@ int MODULEMAINFUNC (int argc, char** argv){
 	if (error || i!=argc) {
 #ifndef STDMAIN
 		haveerror = 1;
-		_3proxy_sem_unlock(conf.threadinit);
 #endif
 		fprintf(stderr, "%s of %s\n"
 			"Usage: %s options\n"
@@ -628,6 +640,9 @@ int MODULEMAINFUNC (int argc, char** argv){
 			""
 #endif
 		);
+#ifndef STDMAIN
+		_3proxy_sem_unlock(conf.threadinit);
+#endif
 
 		return (1);
 	}
@@ -640,7 +655,6 @@ int MODULEMAINFUNC (int argc, char** argv){
 	if (error || argc != i+3 || *argv[i]=='-'|| (*SAPORT(&srv.intsa) = htons((uint16_t)atoi(argv[i])))==0 || (srv.targetport = htons((uint16_t)atoi(argv[i+2])))==0) {
 #ifndef STDMAIN
 		haveerror = 1;
-		_3proxy_sem_unlock(conf.threadinit);
 #endif
 		fprintf(stderr, "%s of %s\n"
 			"Usage: %s options"
@@ -661,6 +675,9 @@ int MODULEMAINFUNC (int argc, char** argv){
 			""
 #endif
 		);
+#ifndef STDMAIN
+		_3proxy_sem_unlock(conf.threadinit);
+#endif
 		return (1);
 	}
 	srv.target = (unsigned char *)strdup(argv[i+1]);
@@ -917,7 +934,7 @@ int MODULEMAINFUNC (int argc, char** argv){
  
 #ifndef _WIN32
  pthread_attr_init(&pa);
- pthread_attr_setstacksize(&pa,PTHREAD_STACK_MIN + (32768 + srv.stacksize));
+ pthread_attr_setstacksize(&pa,threadstacksize(srv.stacksize));
  pthread_attr_setdetachstate(&pa,PTHREAD_CREATE_DETACHED);
 #endif
 
@@ -1051,9 +1068,12 @@ int MODULEMAINFUNC (int argc, char** argv){
 	else {
 		struct clientparam *toparam;
 
-		srv.udplen = sockrecvfrom(NULL, srv.srvsock, (struct sockaddr *)&defparam.sincr, srv.udpbuf, UDPBUFSIZE, 0);
-		if(srv.udplen <= 0) continue;
 		_3proxy_sem_lock(udpinit);
+		srv.udplen = sockrecvfrom(NULL, srv.srvsock, (struct sockaddr *)&defparam.sincr, srv.udpbuf, UDPBUFSIZE, 0);
+		if(srv.udplen <= 0) {
+			_3proxy_sem_unlock(udpinit);
+			continue;
+		}
 		if(hashresolv(&udp_table, &defparam, &toparam, NULL)) {
 		    int i, len=0;
 		
@@ -1172,12 +1192,7 @@ int MODULEMAINFUNC (int argc, char** argv){
 
 #ifndef NOUDPMAIN
 int udpinited = 0;
-#ifdef _WIN32
+_3proxy_sem_t udpinit;
-HANDLE udpinit;
-#else
-_3proxy_mutex_t udpinit;
-#endif
-
 #endif
 
 void srvinit(struct srvparam * srv, struct clientparam *param){
@@ -1216,11 +1231,7 @@ void srvinit(struct srvparam * srv, struct clientparam *param){
  _3proxy_mutex_init(&srv->counter_mutex);
 #ifndef NOUDPMAIN
  if(!udpinited){
-#ifdef _WIN32
+    (void)_3proxy_sem_init(udpinit, 1, 1);
-    udpinit = CreateSemaphore(NULL, 1, 1, NULL);
-#else
-    _3proxy_mutex_init(&udpinit);
-#endif
  }
  udpinited = 1;
 #endif

src/ssl.c

@@ -490,6 +490,24 @@ static int verify_callback(int preverify_ok, X509_STORE_CTX *ctx){
     return preverify_ok;
 }
 
+#ifdef WITH_WOLFSSL
+/* wolfSSL's SSL_CTX_use_PrivateKey(EVP_PKEY*) compat is unreliable: it
+ * silently fails (returns 0, no error queued) for keys loaded via
+ * PEM_read_bio_PrivateKey. Export the key to DER and load via the
+ * native buffer API instead. */
+static int ssl_ctx_use_pkey(SSL_CTX *ctx, EVP_PKEY *key){
+    unsigned char *der = NULL;
+    int len, rc;
+    len = i2d_PrivateKey(key, &der);
+    if(len <= 0 || !der) return 0;
+    rc = wolfSSL_CTX_use_PrivateKey_buffer(ctx, der, (long)len, SSL_FILETYPE_ASN1);
+    OPENSSL_free(der);
+    return rc;
+}
+#else
+#define ssl_ctx_use_pkey(ctx, key) SSL_CTX_use_PrivateKey((ctx), (key))
+#endif
+
 
 SSL_CTX * ssl_cli_ctx(SSL_CONFIG *config, X509 *server_cert, EVP_PKEY *server_key, char** errSSL){
     SSL_CTX *ctx;
@@ -516,11 +534,18 @@ SSL_CTX * ssl_cli_ctx(SSL_CONFIG *config, X509 *server_cert, EVP_PKEY *server_ke
 	}
     }
 
-    err = SSL_CTX_use_PrivateKey(ctx, server_key);
+    /* Load the private key only when a cert is already loaded into ctx.
-    if ( err <= 0 ) {
+     * wolfSSL validates the key against the cert and requires the cert
-	*errSSL = getSSLErr();
+     * to be present first; OpenSSL tolerates either order but is happy
-	SSL_CTX_free(ctx);
+     * with cert-first too. When server_cert is NULL (serv path), the
-	return NULL;
+     * caller loads the cert chain and the key itself after this call. */
+    if(server_cert) {
+	err = ssl_ctx_use_pkey(ctx, server_key);
+	if ( err <= 0 ) {
+	    *errSSL = getSSLErr();
+	    SSL_CTX_free(ctx);
+	    return NULL;
+	}
     }
     SSL_CTX_set_session_id_context(ctx, (const unsigned char *)"3proxy", 6);
     if(config->server_min_proto_version)SSL_CTX_set_min_proto_version(ctx, config->server_min_proto_version);
@@ -655,6 +680,10 @@ static void* ssl_filter_open(void * idata, struct srvparam * srv){
 		fprintf(stderr, "failed to read server cert: %s\n", srvcert);
 		return sc;
 	    }
+	    if(ssl_ctx_use_pkey(sc->cli_ctx, sc->server_key) <= 0){
+		fprintf(stderr, "failed to use server key\n");
+		return sc;
+	    }
 	    sc->serv = 1;
 	}
 	if(mitm || cli || serv){
@@ -678,7 +707,7 @@ static void* ssl_filter_open(void * idata, struct srvparam * srv){
 	    }
 	    if(sc->client_cert){
 		SSL_CTX_use_certificate(sc->srv_ctx, (X509 *) sc->client_cert);
-		SSL_CTX_use_PrivateKey(sc->srv_ctx, sc->client_key);
+		ssl_ctx_use_pkey(sc->srv_ctx, sc->client_key);
 	    }
 	    if(sc->client_min_proto_version)SSL_CTX_set_min_proto_version(sc->srv_ctx, sc->client_min_proto_version);
 	    if(sc->client_max_proto_version)SSL_CTX_set_max_proto_version(sc->srv_ctx, sc->client_max_proto_version);
@@ -705,6 +734,15 @@ static void* ssl_filter_open(void * idata, struct srvparam * srv){
 		    SSL_CTX_set_default_verify_paths(sc->srv_ctx);
 		    SSL_CTX_set_verify(sc->srv_ctx, SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT, NULL);
 	    }
+#ifdef WITH_WOLFSSL
+	    else {
+		/* wolfSSL defaults to peer verification; OpenSSL defaults to
+		 * SSL_VERIFY_NONE. Make the no-verify intent explicit so the
+		 * upstream handshake (ssl_cli / ssl_mitm) succeeds without a
+		 * trusted CA store. */
+		SSL_CTX_set_verify(sc->srv_ctx, SSL_VERIFY_NONE, NULL);
+	    }
+#endif
 	}
 #ifdef WITHSPLICE
 	srv->usesplice = 0;

src/ssllib.c

@@ -45,8 +45,6 @@ static char hexMap[] = {
                           '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
                         };
 
-static BIO *bio_err=NULL;
-
 
 
 char * getSSLErr(){
@@ -74,10 +72,11 @@ static size_t bin2hex (const unsigned char* bin, size_t bin_length, char* str, s
 	return p - str;
 }
 
-static int add_ext(X509 *cert, int nid, char *value)
+static int add_ext(X509 *cert, int nid, const char *value)
 {
 	X509_EXTENSION *ex;
 	X509V3_CTX ctx;
+	int err;
 	/* This sets the 'context' of the extensions. */
 	/* No configuration database */
 	X509V3_set_ctx_nodb(&ctx);
@@ -85,35 +84,24 @@ static int add_ext(X509 *cert, int nid, char *value)
 	 * no request and no CRL
 	 */
 	X509V3_set_ctx(&ctx, cert, cert, NULL, NULL, 0);
-	ex = X509V3_EXT_conf_nid(NULL, &ctx, nid, value);
+	/* value is char * prior to OpenSSL 1.1.0 */
+	ex = X509V3_EXT_conf_nid(NULL, &ctx, nid, (char *)value);
 	if (!ex)
 		return 0;
 
-	X509_add_ext(cert,ex,-1);
+	err = X509_add_ext(cert,ex,-1);
 	X509_EXTENSION_free(ex);
-	return 1;
+	return err > 0;
-}
-
-void del_ext(X509 *dst_cert, int nid, int where){
-	int ex;
-
-	ex = X509_get_ext_by_NID(dst_cert, nid, where);
-	if(ex>=0){
-		X509_EXTENSION *ext;
-		if((ext = X509_delete_ext(dst_cert, ex))) X509_EXTENSION_free(ext);
-	}
-
 }
 
 SSL_CERT ssl_copy_cert(SSL_CERT cert, SSL_CONFIG *config)
 {
 	int err = -1;
+	int san_idx;
 	BIO *fcache;
 	X509 *src_cert = (X509 *) cert;
 	X509 *dst_cert = NULL;
 
-	EVP_PKEY *pk = NULL;
-
 	unsigned char hash_sha256[32];
 	char hash_name_sha256[(16*2) + 1];
 	char cache_name[256];
@@ -142,25 +130,56 @@ SSL_CERT ssl_copy_cert(SSL_CERT cert, SSL_CONFIG *config)
 		}
 	    }
 	}
-	/* proceed if certificate is not cached */
+	/* Build a fresh certificate instead of duplicating the source: only
-	dst_cert = X509_dup(src_cert);
+	 * the fields required for a usable server cert are copied (version,
+	 * serial, subject, validity, SAN). This avoids inheriting upstream
+	 * extensions (AKI, CRL dist points, certificate policies, ...) that
+	 * break chain validation, and works around wolfSSL's no-op
+	 * X509_delete_ext compat shim. */
+	dst_cert = X509_new();
 	if ( dst_cert == NULL ) {
 		return NULL;
 	}
-	del_ext(dst_cert, NID_crl_distribution_points, -1);
+	/* v3 is required, extensions are added below */
-	del_ext(dst_cert, NID_info_access, -1);
+	X509_set_version(dst_cert, 2);
-	del_ext(dst_cert, NID_authority_key_identifier, -1);
+	if(!X509_set_serialNumber(dst_cert, X509_get_serialNumber(src_cert))
-	del_ext(dst_cert, NID_certificate_policies, 0);
+	|| !X509_set_subject_name(dst_cert, X509_get_subject_name(src_cert))
-
+	|| !X509_set_issuer_name(dst_cert, X509_get_subject_name(config->CA_cert))){
+		X509_free(dst_cert);
+		return NULL;
+	}
 	err = X509_set_pubkey(dst_cert, config->server_key?config->server_key:config->CA_key);
 	if ( err == 0 ) {
 		X509_free(dst_cert);
 		return NULL;
 	}
-
+#if !defined(WITH_WOLFSSL) && OPENSSL_VERSION_NUMBER < 0x10100000L
-
+	if(!X509_set_notBefore(dst_cert, X509_get_notBefore(src_cert))
-	err = X509_set_issuer_name(dst_cert, X509_get_subject_name(config->CA_cert));
+	|| !X509_set_notAfter(dst_cert, X509_get_notAfter(src_cert))){
-	if(!err){
+#else
+	if(!X509_set1_notBefore(dst_cert, X509_get0_notBefore(src_cert))
+	|| !X509_set1_notAfter(dst_cert, X509_get0_notAfter(src_cert))){
+#endif
+		X509_free(dst_cert);
+		return NULL;
+	}
+	san_idx = X509_get_ext_by_NID(src_cert, NID_subject_alt_name, -1);
+	if(san_idx >= 0){
+	    X509_EXTENSION *san;
+	    san = X509_get_ext(src_cert, san_idx);
+	    if(san && !X509_add_ext(dst_cert, san, -1)){
+		X509_free(dst_cert);
+		return NULL;
+	    }
+	}
+	/* Extensions required from an end entity certificate. Without EKU
+	 * serverAuth Apple's TLS stack (and Chrome on macOS/iOS, which uses it)
+	 * rejects the certificate. keyUsage is intentionally not set: it depends
+	 * on the type of the key being reused for every generated certificate,
+	 * and an absent keyUsage places no restriction.
+	 */
+	if(!add_ext(dst_cert, NID_basic_constraints, "critical,CA:FALSE")
+	|| !add_ext(dst_cert, NID_ext_key_usage, "serverAuth")){
 		X509_free(dst_cert);
 		return NULL;
 	}
@@ -229,6 +248,14 @@ void _ssl_cert_free(SSL_CERT cert)
 
 
 
+/* OpenSSL before 1.1.0 requires the application to install threading
+   callbacks; OpenSSL >= 1.1.0 and wolfSSL handle locking internally. */
+#if !defined(WITH_WOLFSSL) && defined(OPENSSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x10100000L
+#define LEGACY_SSL_THREADING 1
+#else
+#define LEGACY_SSL_THREADING 0
+#endif
+
 /* This array will store all of the mutexes available to OpenSSL. */
 static _3proxy_mutex_t *mutex_buf= NULL;
 
@@ -252,6 +279,7 @@ static unsigned long id_function(void)
 
 int thread_setup(void)
 {
+#if LEGACY_SSL_THREADING
   int i;
 
   mutex_buf = malloc(CRYPTO_num_locks(  ) * sizeof(_3proxy_mutex_t));
@@ -262,10 +290,14 @@ int thread_setup(void)
   CRYPTO_set_id_callback(id_function);
   CRYPTO_set_locking_callback(locking_function);
   return 1;
+#else
+  return 1;
+#endif
 }
 
 int thread_cleanup(void)
 {
+#if LEGACY_SSL_THREADING
   int i;
 
   if (!mutex_buf)
@@ -277,6 +309,9 @@ int thread_cleanup(void)
   free(mutex_buf);
   mutex_buf = NULL;
   return 1;
+#else
+  return 1;
+#endif
 }
 
 
@@ -291,9 +326,14 @@ void ssl_init()
 
 	    ssl_init_done = 1;
 	    thread_setup();
+#ifdef WITH_WOLFSSL
+	    wolfSSL_Init();
+#elif defined(OPENSSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER >= 0x10100000L
+	    OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL);
+#else
 	    SSLeay_add_ssl_algorithms();
 	    SSL_load_error_strings();
+#endif
 	    _3proxy_mutex_init(&ssl_file_mutex);
-	    bio_err=BIO_new_fp(stderr,BIO_NOCLOSE);
     	}
 }

src/structures.h

@@ -42,6 +42,12 @@ extern "C" {
 #define _3proxy_mutex_destroy pthread_mutex_destroy
 #define _3proxy_mutex_lock pthread_mutex_lock
 #define _3proxy_mutex_unlock pthread_mutex_unlock
+typedef struct _3proxy_sem_s {
+	pthread_mutex_t mutex;
+	pthread_cond_t cond;
+	unsigned count;
+	unsigned maxcount;
+} _3proxy_sem_t;
 #else
 #include <winsock2.h>
 #include <ws2tcpip.h>
@@ -50,6 +56,7 @@ extern "C" {
 #define _3proxy_mutex_lock(x) EnterCriticalSection(x)
 #define _3proxy_mutex_unlock(x) LeaveCriticalSection(x)
 #define _3proxy_mutex_destroy(x) DeleteCriticalSection(x)
+#define _3proxy_sem_t HANDLE
 #ifdef MSVC
 #pragma warning (disable : 4996)
 #endif
@@ -682,11 +689,7 @@ struct filemon {
 
 
 struct extparam {
-#ifdef _WIN32
+	_3proxy_sem_t threadinit;
-	HANDLE threadinit;
-#else
-	_3proxy_mutex_t threadinit;
-#endif
 	int *timeouts;
 	struct ace * acl;
 	char * conffile;

src/tlspr.c

@@ -190,7 +190,7 @@ int clistarttls(struct clientparam *param, PROXYSERVICE proto){
 			return 0;
 		}
 		if(!strncasecmp((char *)buf, "EHLO ", 5)){
-			socksend(param, param->clisock, (unsigned char *)"250-Proxy\r\n250 STARTTLS\r\n", 24, conf.timeouts[STRING_S]);
+			socksend(param, param->clisock, (unsigned char *)"250-Proxy\r\n250 STARTTLS\r\n", 25, conf.timeouts[STRING_S]);
 			continue;
 		}
 		if(!strncasecmp((char *)buf, "HELO ", 5)){
@@ -201,8 +201,10 @@ int clistarttls(struct clientparam *param, PROXYSERVICE proto){
 			socksend(param, param->clisock, (unsigned char *)"221 Proxy\r\n", 11, conf.timeouts[STRING_S]);
 			return -1;
 		}
-		socksend(param, param->clisock, (unsigned char *)"530 5.7.0 Must issue a STARTTLS command first\r\n", 45, conf.timeouts[STRING_S]);
+		socksend(param, param->clisock, (unsigned char *)"530 5.7.0 Must issue a STARTTLS command first\r\n", 47, conf.timeouts[STRING_S]);
 	}
+ default:
+	break;
  }
  return 1;
 }