Merging upstream version 1.29.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

5 files changed, 101 insertions, 569 deletions

diff --git a/libnetdata/socket/Makefile.in b/libnetdata/socket/Makefile.in
deleted file mode 100644
index d6e64cacd..000000000
--- a/libnetdata/socket/Makefile.in
+++ /dev/null
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diff --git a/libnetdata/socket/security.c b/libnetdata/socket/security.c
index ab324a169..53366c4d8 100644
--- a/libnetdata/socket/security.c
+++ b/libnetdata/socket/security.c
@@ -2,11 +2,13 @@
 
 #ifdef ENABLE_HTTPS
 
-SSL_CTX *netdata_opentsdb_ctx=NULL;
+SSL_CTX *netdata_exporting_ctx=NULL;
 SSL_CTX *netdata_client_ctx=NULL;
 SSL_CTX *netdata_srv_ctx=NULL;
 const char *security_key=NULL;
 const char *security_cert=NULL;
+const char *tls_version=NULL;
+const char *tls_ciphers=NULL;
 int netdata_validate_server =  NETDATA_SSL_VALID_CERTIFICATE;
 
 /**
@@ -32,14 +34,12 @@ static void security_info_callback(const SSL *ssl, int where, int ret __maybe_un
  */
 void security_openssl_library()
 {
-#if OPENSSL_VERSION_NUMBER < 0x10100000L
-# if (SSLEAY_VERSION_NUMBER >= 0x0907000L)
+#if OPENSSL_VERSION_NUMBER < OPENSSL_VERSION_110
+# if (SSLEAY_VERSION_NUMBER >= OPENSSL_VERSION_097)
     OPENSSL_config(NULL);
 # endif
 
-# if OPENSSL_API_COMPAT < 0x10100000L
     SSL_load_error_strings();
-# endif
 
     SSL_library_init();
 #else
@@ -49,32 +49,64 @@ void security_openssl_library()
 #endif
 }
 
+#if OPENSSL_VERSION_NUMBER >= OPENSSL_VERSION_110
+/**
+ * TLS version
+ *
+ * Returns the TLS version depending of the user input.
+ *
+ * @param lversion is the user input.
+ *
+ * @return it returns the version number.
+ */
+int tls_select_version(const char *lversion) {
+    if (!strcmp(lversion, "1") || !strcmp(lversion, "1.0"))
+        return TLS1_VERSION;
+    else if (!strcmp(lversion, "1.1"))
+        return TLS1_1_VERSION;
+    else if (!strcmp(lversion, "1.2"))
+        return TLS1_2_VERSION;
+#if defined(TLS1_3_VERSION)
+    else if (!strcmp(lversion, "1.3"))
+        return TLS1_3_VERSION;
+#endif
+
+#if defined(TLS_MAX_VERSION)
+    return TLS_MAX_VERSION;
+#else
+    return TLS1_2_VERSION;
+#endif
+}
+#endif
+
 /**
  * OpenSSL common options
  *
  * Clients and SERVER have common options, this function is responsible to set them in the context.
  *
- * @param ctx
+ * @param ctx the initialized SSL context.
+ * @param side 0 means server, and 1 client.
  */
-void security_openssl_common_options(SSL_CTX *ctx) {
-#if OPENSSL_VERSION_NUMBER >= 0x10100000L
-    static char *ciphers = {"ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA"};
+void security_openssl_common_options(SSL_CTX *ctx, int side) {
+#if OPENSSL_VERSION_NUMBER >= OPENSSL_VERSION_110
+    if (!side) {
+        int version =  tls_select_version(tls_version) ;
 #endif
-#if OPENSSL_VERSION_NUMBER < 0x10100000L
-    SSL_CTX_set_options (ctx,SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_COMPRESSION);
+#if OPENSSL_VERSION_NUMBER < OPENSSL_VERSION_110
+        SSL_CTX_set_options (ctx,SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_COMPRESSION);
 #else
-    SSL_CTX_set_min_proto_version(ctx, TLS1_2_VERSION);
-    //We are avoiding the TLS v1.3 for while, because Google Chrome
-    //is giving the message net::ERR_SSL_VERSION_INTERFERENCE with it.
-    SSL_CTX_set_max_proto_version(ctx, TLS1_2_VERSION);
-#endif
-    SSL_CTX_set_mode(ctx, SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
+        SSL_CTX_set_min_proto_version(ctx, TLS1_VERSION);
+        SSL_CTX_set_max_proto_version(ctx, version);
 
-#if OPENSSL_VERSION_NUMBER >= 0x10100000L
-    if (!SSL_CTX_set_cipher_list(ctx, ciphers)) {
-        error("SSL error. cannot set the cipher list");
+        if(tls_ciphers  && strcmp(tls_ciphers, "none") != 0) {
+            if (!SSL_CTX_set_cipher_list(ctx, tls_ciphers)) {
+                error("SSL error. cannot set the cipher list");
+            }
+        }
     }
 #endif
+
+    SSL_CTX_set_mode(ctx, SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
 }
 
 /**
@@ -84,15 +116,26 @@ void security_openssl_common_options(SSL_CTX *ctx) {
  *
  * @return It returns the context on success or NULL otherwise
  */
-static SSL_CTX * security_initialize_openssl_client() {
+SSL_CTX * security_initialize_openssl_client() {
     SSL_CTX *ctx;
-#if OPENSSL_VERSION_NUMBER < 0x10100000L
+#if OPENSSL_VERSION_NUMBER < OPENSSL_VERSION_110
     ctx = SSL_CTX_new(SSLv23_client_method());
 #else
     ctx = SSL_CTX_new(TLS_client_method());
 #endif
     if(ctx) {
-        security_openssl_common_options(ctx);
+#if OPENSSL_VERSION_NUMBER < OPENSSL_VERSION_110
+        SSL_CTX_set_options (ctx,SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_COMPRESSION);
+#else
+        SSL_CTX_set_min_proto_version(ctx, TLS1_VERSION);
+# if defined(TLS_MAX_VERSION)
+        SSL_CTX_set_max_proto_version(ctx, TLS_MAX_VERSION);
+# elif defined(TLS1_3_VERSION)
+        SSL_CTX_set_max_proto_version(ctx, TLS1_3_VERSION);
+# elif defined(TLS1_2_VERSION)
+        SSL_CTX_set_max_proto_version(ctx, TLS1_2_VERSION);
+# endif
+#endif
     }
 
     return ctx;
@@ -111,7 +154,7 @@ static SSL_CTX * security_initialize_openssl_server() {
 	static int netdata_id_context = 1;
 
     //TO DO: Confirm the necessity to check return for other OPENSSL function
-#if OPENSSL_VERSION_NUMBER < 0x10100000L
+#if OPENSSL_VERSION_NUMBER < OPENSSL_VERSION_110
 	ctx = SSL_CTX_new(SSLv23_server_method());
     if (!ctx) {
 		error("Cannot create a new SSL context, netdata won't encrypt communication");
@@ -128,7 +171,7 @@ static SSL_CTX * security_initialize_openssl_server() {
 
     SSL_CTX_use_certificate_chain_file(ctx, security_cert);
 #endif
-    security_openssl_common_options(ctx);
+    security_openssl_common_options(ctx, 0);
 
     SSL_CTX_use_PrivateKey_file(ctx,security_key,SSL_FILETYPE_PEM);
 
@@ -142,7 +185,7 @@ static SSL_CTX * security_initialize_openssl_server() {
 	SSL_CTX_set_session_id_context(ctx,(void*)&netdata_id_context,(unsigned int)sizeof(netdata_id_context));
     SSL_CTX_set_info_callback(ctx,security_info_callback);
 
-#if (OPENSSL_VERSION_NUMBER < 0x00905100L)
+#if (OPENSSL_VERSION_NUMBER < OPENSSL_VERSION_095)
 	SSL_CTX_set_verify_depth(ctx,1);
 #endif
     debug(D_WEB_CLIENT,"SSL GLOBAL CONTEXT STARTED\n");
@@ -158,7 +201,7 @@ static SSL_CTX * security_initialize_openssl_server() {
  * @param selector informs the context that must be initialized, the following list has the valid values:
  *      NETDATA_SSL_CONTEXT_SERVER - the server context
  *      NETDATA_SSL_CONTEXT_STREAMING - Starts the streaming context.
- *      NETDATA_SSL_CONTEXT_OPENTSDB - Starts the OpenTSDB contextv
+ *      NETDATA_SSL_CONTEXT_EXPORTING - Starts the OpenTSDB contextv
  */
 void security_start_ssl(int selector) {
     switch (selector) {
@@ -179,8 +222,8 @@ void security_start_ssl(int selector) {
             SSL_CTX_set_mode(netdata_client_ctx, SSL_MODE_ENABLE_PARTIAL_WRITE |SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER |SSL_MODE_AUTO_RETRY);
             break;
         }
-        case NETDATA_SSL_CONTEXT_OPENTSDB: {
-            netdata_opentsdb_ctx = security_initialize_openssl_client();
+        case NETDATA_SSL_CONTEXT_EXPORTING: {
+            netdata_exporting_ctx = security_initialize_openssl_client();
             break;
         }
     }
@@ -191,23 +234,21 @@ void security_start_ssl(int selector) {
  *
  * Clean all the allocated contexts from netdata.
  */
-void security_clean_openssl() {
-	if (netdata_srv_ctx)
-	{
-		SSL_CTX_free(netdata_srv_ctx);
-	}
+void security_clean_openssl()
+{
+    if (netdata_srv_ctx) {
+        SSL_CTX_free(netdata_srv_ctx);
+    }
 
-    if (netdata_client_ctx)
-    {
+    if (netdata_client_ctx) {
         SSL_CTX_free(netdata_client_ctx);
     }
 
-    if ( netdata_opentsdb_ctx )
-    {
-        SSL_CTX_free(netdata_opentsdb_ctx);
+    if (netdata_exporting_ctx) {
+        SSL_CTX_free(netdata_exporting_ctx);
     }
 
-#if OPENSSL_VERSION_NUMBER < 0x10100000L
+#if OPENSSL_VERSION_NUMBER < OPENSSL_VERSION_110
     ERR_free_strings();
 #endif
 }
@@ -273,7 +314,7 @@ int security_process_accept(SSL *ssl,int msg) {
 /**
  * Test Certificate
  *
- * Check the certificate of Netdata master
+ * Check the certificate of Netdata parent
  *
  * @param ssl is the connection structure
  *
@@ -305,10 +346,10 @@ int security_test_certificate(SSL *ssl) {
  * Location for context
  *
  * Case the user give us a directory with the certificates available and
- * the Netdata master certificate, we use this function to validate the certificate.
+ * the Netdata parent certificate, we use this function to validate the certificate.
  *
  * @param ctx the context where the path will be set.
- * @param file the file with Netdata master certificate.
+ * @param file the file with Netdata parent certificate.
  * @param path the directory where the certificates are stored.
  *
  * @return It returns 0 on success and -1 otherwise.
@@ -316,7 +357,7 @@ int security_test_certificate(SSL *ssl) {
 int security_location_for_context(SSL_CTX *ctx, char *file, char *path) {
     struct stat statbuf;
     if (stat(file, &statbuf)) {
-        info("Netdata does not have a SSL master certificate, so it will use the default OpenSSL configuration to validate certificates!");
+        info("Netdata does not have the parent's SSL certificate, so it will use the default OpenSSL configuration to validate certificates!");
         return 0;
     }
 
@@ -336,7 +377,7 @@ int security_location_for_context(SSL_CTX *ctx, char *file, char *path) {
 slfc:
     while ((err = ERR_get_error()) != 0) {
         ERR_error_string_n(err, buf, sizeof(buf));
-        error("Cannot set the directory for the certificates and the master SSL certificate: %s",buf);
+        error("Cannot set the directory for the certificates and the parent SSL certificate: %s",buf);
     }
     return -1;
 }
diff --git a/libnetdata/socket/security.h b/libnetdata/socket/security.h
index 697e0fda1..17ecc6d05 100644
--- a/libnetdata/socket/security.h
+++ b/libnetdata/socket/security.h
@@ -10,29 +10,37 @@
 # define NETDATA_SSL_FORCE 32                //We only accepts HTTPS request
 # define NETDATA_SSL_INVALID_CERTIFICATE 64  //Accepts invalid certificate
 # define NETDATA_SSL_VALID_CERTIFICATE 128  //Accepts invalid certificate
+# define NETDATA_SSL_PROXY_HTTPS 256        //Proxy is using HTTPS
 
 #define NETDATA_SSL_CONTEXT_SERVER 0
 #define NETDATA_SSL_CONTEXT_STREAMING 1
-#define NETDATA_SSL_CONTEXT_OPENTSDB 2
+#define NETDATA_SSL_CONTEXT_EXPORTING 2
 
 # ifdef ENABLE_HTTPS
 
+#define OPENSSL_VERSION_095 0x00905100L
+#define OPENSSL_VERSION_097 0x0907000L
+#define OPENSSL_VERSION_110 0x10100000L
+#define OPENSSL_VERSION_111 0x10101000L
+
 #  include <openssl/ssl.h>
 #  include <openssl/err.h>
-#  if (SSLEAY_VERSION_NUMBER >= 0x0907000L) && (OPENSSL_VERSION_NUMBER < 0x10100000L)
+#  if (SSLEAY_VERSION_NUMBER >= OPENSSL_VERSION_097) && (OPENSSL_VERSION_NUMBER < OPENSSL_VERSION_110)
 #   include <openssl/conf.h>
 #  endif
 
 struct netdata_ssl{
     SSL *conn; //SSL connection
-    int flags; //The flags for SSL connection
+    uint32_t flags; //The flags for SSL connection
 };
 
-extern SSL_CTX *netdata_opentsdb_ctx;
+extern SSL_CTX *netdata_exporting_ctx;
 extern SSL_CTX *netdata_client_ctx;
 extern SSL_CTX *netdata_srv_ctx;
 extern const char *security_key;
 extern const char *security_cert;
+extern const char *tls_version;
+extern const char *tls_ciphers;
 extern int netdata_validate_server;
 extern int security_location_for_context(SSL_CTX *ctx,char *file,char *path);
 
@@ -41,6 +49,7 @@ void security_clean_openssl();
 void security_start_ssl(int selector);
 int security_process_accept(SSL *ssl,int msg);
 int security_test_certificate(SSL *ssl);
+SSL_CTX * security_initialize_openssl_client();
 
 # endif //ENABLE_HTTPS
 #endif //NETDATA_SECURITY_H
diff --git a/libnetdata/socket/socket.c b/libnetdata/socket/socket.c
index 2289bf4c4..73eb8e662 100644
--- a/libnetdata/socket/socket.c
+++ b/libnetdata/socket/socket.c
@@ -607,7 +607,7 @@ static inline int connect_to_unix(const char *path, struct timeval *timeout) {
 // service     the service name or port to connect to
 // timeout     the timeout for establishing a connection
 
-static inline int connect_to_this_ip46(int protocol, int socktype, const char *host, uint32_t scope_id, const char *service, struct timeval *timeout) {
+int connect_to_this_ip46(int protocol, int socktype, const char *host, uint32_t scope_id, const char *service, struct timeval *timeout) {
     struct addrinfo hints;
     struct addrinfo *ai_head = NULL, *ai = NULL;
 
diff --git a/libnetdata/socket/socket.h b/libnetdata/socket/socket.h
index eb09b3f9a..a40d801dd 100644
--- a/libnetdata/socket/socket.h
+++ b/libnetdata/socket/socket.h
@@ -56,6 +56,7 @@ extern void listen_sockets_close(LISTEN_SOCKETS *sockets);
 
 extern int connect_to_this(const char *definition, int default_port, struct timeval *timeout);
 extern int connect_to_one_of(const char *destination, int default_port, struct timeval *timeout, size_t *reconnects_counter, char *connected_to, size_t connected_to_size);
+int connect_to_this_ip46(int protocol, int socktype, const char *host, uint32_t scope_id, const char *service, struct timeval *timeout);
 
 #ifdef ENABLE_HTTPS
 extern ssize_t recv_timeout(struct netdata_ssl *ssl,int sockfd, void *buf, size_t len, int flags, int timeout);