This change facilitates name translation for shared libraries. The

[openssl.git] / crypto / dso / dso.h

diff --git a/crypto/dso/dso.h b/crypto/dso/dso.h
index 5f86eb3ff820a03c43b1077289f1beea8bd687ea..281af47c2624db6112399f690af59227dd018177 100644 (file)
--- a/crypto/dso/dso.h
+++ b/crypto/dso/dso.h
@@ -65,6 +65,20 @@
 extern "C" {
 #endif
 
+/* These values are used as commands to DSO_ctrl() */
+#define DSO_CTRL_GET_FLAGS     1
+#define DSO_CTRL_SET_FLAGS     2
+#define DSO_CTRL_OR_FLAGS      3
+
+/* These flags control the translation of file-names from canonical to
+ * native. Eg. in the CryptoSwift support, the "dl" and "dlfcn"
+ * methods will translate "swift" -> "libswift.so" whereas the "win32"
+ * method will translate "swift" -> "swift.dll". NB: Until I can figure
+ * out how to be more "conventional" with this, the methods will only
+ * honour this flag if it looks like it was passed a file without any
+ * path and if the filename is small enough.
+ */
+#define DSO_FLAG_NAME_TRANSLATION 0x01
 
 typedef struct dso_st DSO;
 
@@ -72,18 +86,22 @@ typedef struct dso_meth_st
        {
        const char *name;
        /* Loads a shared library */
-       int (*dso_load)(DSO *dso, char *filename);
+       int (*dso_load)(DSO *dso, const char *filename);
        /* Unloads a shared library */
        int (*dso_unload)(DSO *dso);
        /* Binds a function, variable, or whatever */
-       int (*dso_bind)(DSO *dso, char *symname, void **symptr);
+       int (*dso_bind)(DSO *dso, const char *symname, void **symptr);
 
 /* I don't think this would actually be used in any circumstances. */
 #if 0
        /* Unbinds a symbol */
        int (*dso_unbind)(DSO *dso, char *symname, void *symptr);
 #endif
+       /* The generic (yuck) "ctrl()" function. NB: Negative return
+        * values (rather than zero) indicate errors. */
+       long (*dso_ctrl)(DSO *dso, int cmd, long larg, void *parg);
 
+       /* [De]Initialisation handlers. */
        int (*init)(DSO *dso);
        int (*finish)(DSO *dso);
        } DSO_METHOD;
@@ -113,6 +131,7 @@ DSO *       DSO_new_method(DSO_METHOD *method);
 int    DSO_free(DSO *dso);
 int    DSO_flags(DSO *dso);
 int    DSO_up(DSO *dso);
+long   DSO_ctrl(DSO *dso, int cmd, long larg, void *parg);
 
 void DSO_set_default_method(DSO_METHOD *meth);
 DSO_METHOD *DSO_get_default_method(void);
@@ -120,13 +139,16 @@ DSO_METHOD *DSO_get_method(DSO *dso);
 DSO_METHOD *DSO_set_method(DSO *dso, DSO_METHOD *meth);
 
 /* The all-singing all-dancing load function, you normally pass NULL
- * for the last two parameters. Use DSO_up and DSO_free for reference
- * count handling. */
-DSO *DSO_load(DSO *dso, char *filename, DSO_METHOD *meth);
+ * for the first and third parameters. Use DSO_up and DSO_free for
+ * subsequent reference count handling. Any flags passed in will be set
+ * in the constructed DSO after its init() function but before the
+ * load operation. This will be done with;
+ *    DSO_ctrl(dso, DSO_CTRL_SET_FLAGS, flags, NULL); */
+DSO *DSO_load(DSO *dso, const char *filename, DSO_METHOD *meth, int flags);
 
 /* This function binds to a function, variable, whatever inside a
  * shared library. */
-void *DSO_bind(DSO *dso, char *symname);
+void *DSO_bind(DSO *dso, const char *symname);
 
 /* This method is the default, but will beg, borrow, or steal whatever
  * method should be the default on any particular platform (including
@@ -163,17 +185,21 @@ void ERR_load_DSO_strings(void);
 #define DSO_F_DLFCN_BIND                                100
 #define DSO_F_DLFCN_LOAD                                101
 #define DSO_F_DLFCN_UNLOAD                              102
-#define DSO_F_DL_BIND                                   103
-#define DSO_F_DL_LOAD                                   104
-#define DSO_F_DL_UNLOAD                                         105
-#define DSO_F_DSO_BIND                                  106
-#define DSO_F_DSO_FREE                                  107
-#define DSO_F_DSO_LOAD                                  108
-#define DSO_F_DSO_NEW_METHOD                            109
-#define DSO_F_DSO_UP                                    110
-#define DSO_F_WIN32_BIND                                111
-#define DSO_F_WIN32_LOAD                                112
-#define DSO_F_WIN32_UNLOAD                              113
+#define DSO_F_DLFCN_CTRL                                103
+#define DSO_F_DL_BIND                                   104
+#define DSO_F_DL_LOAD                                   105
+#define DSO_F_DL_UNLOAD                                         106
+#define DSO_F_DL_CTRL                                   107
+#define DSO_F_DSO_BIND                                  108
+#define DSO_F_DSO_FREE                                  109
+#define DSO_F_DSO_LOAD                                  110
+#define DSO_F_DSO_NEW_METHOD                            111
+#define DSO_F_DSO_UP                                    112
+#define DSO_F_DSO_CTRL                                  113
+#define DSO_F_WIN32_BIND                                114
+#define DSO_F_WIN32_LOAD                                115
+#define DSO_F_WIN32_UNLOAD                              116
+#define DSO_F_WIN32_CTRL                                117
 
 /* Reason codes. */
 #define DSO_R_FINISH_FAILED                             100
@@ -183,6 +209,8 @@ void ERR_load_DSO_strings(void);
 #define DSO_R_SYM_FAILURE                               104
 #define DSO_R_UNLOAD_FAILED                             105
 #define DSO_R_UNSUPPORTED                               106
+#define DSO_R_UNKNOWN_COMMAND                           107
+#define DSO_R_CTRL_FAILED                               108
 
 #ifdef  __cplusplus
 }