Improved connect in mixed IPv4/IPv6 environments and improved TLS connections without a root certificate.

Other internal improvements.

Author: marcobambini

C_SDK/csql.h

@@ -175,7 +175,7 @@ typedef unsigned long in_addr_t;
 #define kMAXCHUNK						100*1024
 #define NO_TIMEOUT						0
 #define CONNECT_TIMEOUT					5
-    
+	
 #if defined(HAVE_BZERO) || defined(bzero)
 // do nothing
 #else
@@ -208,13 +208,17 @@ int tls_close(struct tls *_ctx);
 int tls_config_set_ca_file(struct tls_config *_config, const char *_ca_file);
 int tls_config_set_cert_file(struct tls_config *_config,const char *_cert_file);
 int tls_config_set_key_file(struct tls_config *_config, const char *_key_file);
+void tls_config_insecure_noverifycert(struct tls_config* config);
+void tls_config_insecure_noverifyname(struct tls_config* config);
+int tls_config_set_ciphers(struct tls_config *config, const char *ciphers);
 ssize_t tls_read(struct tls *_ctx, void *_buf, size_t _buflen);
 ssize_t tls_write(struct tls *_ctx, const void *_buf, size_t _buflen);
 const char *tls_error(struct tls *_ctx);
 const char *tls_config_error(struct tls_config *_config);
 void tls_free(struct tls *_ctx);
+const char* SSLeay_version(int t);
 #endif
-    
+	
 /* COMMANDS */
 #define	kCOMMAND_CONNECT				1
 #define	kCOMMAND_SELECT					2
@@ -306,14 +310,14 @@ struct csqldb {
 	int				        errcode;					// last error code
 	int				        useOldProtocol;				// flag to set if you want to use the old REALSQLServer protocol
 	int				        verifyPeer;					// flag to check if peer verification must be performed
-    int                     family;
+	int                     family;
 
 	char			        *token;						// optional token used in token connect
 	char			        *hostverification;			// optional host verification name to use in SSL peer verification
 	void			        *userptr;					// optional pointer saved by the user
 	int				        encryption;					// CUBESQL_ENCRYPTION_NONE - CUBESQL_ENCRYPTION_AES128
-                                                        // CUBESQL_ENCRYPTION_AES192 - CUBESQL_ENCRYPTION_AES256
-    
+														// CUBESQL_ENCRYPTION_AES192 - CUBESQL_ENCRYPTION_AES256
+	
 	csql_aes_encrypt_ctx    encryptkey[1];              // session key used to encrypt data
 	csql_aes_decrypt_ctx    decryptkey[1];              // session key used to decrypt data
 
@@ -324,9 +328,9 @@ struct csqldb {
 	inhead			        request;                    // request header
 	outhead			        reply;                      // response header
 
-    #ifndef CUBESQL_DISABLE_SSL_ENCRYPTION
-    struct tls              *tls_context;               // TLS context connection
-    #endif
+	#ifndef CUBESQL_DISABLE_SSL_ENCRYPTION
+	struct tls              *tls_context;               // TLS context connection
+	#endif
 
 	void (*trace) (const char*, void*);                 // trace callback
 	void                    *data;                      // user argument to be passed to the callbacks function