On VMS, the norm is still that symbols are uppercased, so for now it's better
[openssl.git] / crypto / dso / dso_dlfcn.c
index 7638724..1a19164 100644 (file)
@@ -74,26 +74,31 @@ DSO_METHOD *DSO_METHOD_dlfcn(void)
 /* Part of the hack in "dlfcn_load" ... */
 #define DSO_MAX_TRANSLATED_SIZE 256
 
-static int dlfcn_load(DSO *dso, const char *filename);
+static int dlfcn_load(DSO *dso);
 static int dlfcn_unload(DSO *dso);
-static int dlfcn_bind(DSO *dso, const char *symname, void **symptr);
+static void *dlfcn_bind_var(DSO *dso, const char *symname);
+static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname);
 #if 0
 static int dlfcn_unbind(DSO *dso, char *symname, void *symptr);
 static int dlfcn_init(DSO *dso);
 static int dlfcn_finish(DSO *dso);
-#endif
 static long dlfcn_ctrl(DSO *dso, int cmd, long larg, void *parg);
+#endif
+static char *dlfcn_name_converter(DSO *dso, const char *filename);
 
 static DSO_METHOD dso_meth_dlfcn = {
        "OpenSSL 'dlfcn' shared library method",
        dlfcn_load,
        dlfcn_unload,
-       dlfcn_bind,
+       dlfcn_bind_var,
+       dlfcn_bind_func,
 /* For now, "unbind" doesn't exist */
 #if 0
-       NULL, /* unbind */
+       NULL, /* unbind_var */
+       NULL, /* unbind_func */
 #endif
-       dlfcn_ctrl,
+       NULL, /* ctrl */
+       dlfcn_name_converter,
        NULL, /* init */
        NULL  /* finish */
        };
@@ -103,45 +108,64 @@ DSO_METHOD *DSO_METHOD_dlfcn(void)
        return(&dso_meth_dlfcn);
        }
 
+/* Prior to using the dlopen() function, we should decide on the flag
+ * we send. There's a few different ways of doing this and it's a
+ * messy venn-diagram to match up which platforms support what. So
+ * as we don't have autoconf yet, I'm implementing a hack that could
+ * be hacked further relatively easily to deal with cases as we find
+ * them. Initially this is to cope with OpenBSD. */
+#ifdef __OpenBSD__
+#      ifdef DL_LAZY
+#              define DLOPEN_FLAG DL_LAZY
+#      else
+#              ifdef RTLD_NOW
+#                      define DLOPEN_FLAG RTLD_NOW
+#              else
+#                      define DLOPEN_FLAG 0
+#              endif
+#      endif
+#else
+#      define DLOPEN_FLAG RTLD_NOW /* Hope this works everywhere else */
+#endif
+
 /* For this DSO_METHOD, our meth_data STACK will contain;
  * (i) the handle (void*) returned from dlopen().
  */
 
-static int dlfcn_load(DSO *dso, const char *filename)
+static int dlfcn_load(DSO *dso)
        {
-       void *ptr;
-       char translated[DSO_MAX_TRANSLATED_SIZE];
-       int len;
+       void *ptr = NULL;
+       /* See applicable comments in dso_dl.c */
+       char *filename = DSO_convert_filename(dso, NULL);
 
-       /* NB: This is a hideous hack, but I'm not yet sure what
-        * to replace it with. This attempts to convert any filename,
-        * that looks like it has no path information, into a
-        * translated form, e. "blah" -> "libblah.so" */
-       len = strlen(filename);
-       if((dso->flags & DSO_FLAG_NAME_TRANSLATION) &&
-                       (len + 6 < DSO_MAX_TRANSLATED_SIZE) &&
-                       (strstr(filename, "/") == NULL))
-               {
-               sprintf(translated, "lib%s.so", filename);
-               ptr = dlopen(translated, RTLD_NOW);
-               }
-       else
+       if(filename == NULL)
                {
-               ptr = dlopen(filename, RTLD_NOW);
+               DSOerr(DSO_F_DLFCN_LOAD,DSO_R_NO_FILENAME);
+               goto err;
                }
+       ptr = dlopen(filename, DLOPEN_FLAG);
        if(ptr == NULL)
                {
                DSOerr(DSO_F_DLFCN_LOAD,DSO_R_LOAD_FAILED);
-               return(0);
+               ERR_add_error_data(4, "filename(", filename, "): ", dlerror());
+               goto err;
                }
        if(!sk_push(dso->meth_data, (char *)ptr))
                {
                DSOerr(DSO_F_DLFCN_LOAD,DSO_R_STACK_ERROR);
-               dlclose(ptr);
-               return(0);
+               goto err;
                }
+       /* Success */
+       dso->loaded_filename = filename;
        return(1);
-       }
+err:
+       /* Cleanup! */
+       if(filename != NULL)
+               OPENSSL_free(filename);
+       if(ptr != NULL)
+               dlclose(ptr);
+       return(0);
+}
 
 static int dlfcn_unload(DSO *dso)
        {
@@ -167,58 +191,99 @@ static int dlfcn_unload(DSO *dso)
        return(1);
        }
 
-static int dlfcn_bind(DSO *dso, const char *symname, void **symptr)
+static void *dlfcn_bind_var(DSO *dso, const char *symname)
        {
        void *ptr, *sym;
 
-       if((dso == NULL) || (symptr == NULL) || (symname == NULL))
+       if((dso == NULL) || (symname == NULL))
                {
-               DSOerr(DSO_F_DLFCN_BIND,ERR_R_PASSED_NULL_PARAMETER);
-               return(0);
+               DSOerr(DSO_F_DLFCN_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
+               return(NULL);
                }
        if(sk_num(dso->meth_data) < 1)
                {
-               DSOerr(DSO_F_DLFCN_BIND,DSO_R_STACK_ERROR);
-               return(0);
+               DSOerr(DSO_F_DLFCN_BIND_VAR,DSO_R_STACK_ERROR);
+               return(NULL);
                }
        ptr = (void *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
        if(ptr == NULL)
                {
-               DSOerr(DSO_F_DLFCN_BIND,DSO_R_NULL_HANDLE);
-               return(0);
+               DSOerr(DSO_F_DLFCN_BIND_VAR,DSO_R_NULL_HANDLE);
+               return(NULL);
                }
        sym = dlsym(ptr, symname);
        if(sym == NULL)
                {
-               DSOerr(DSO_F_DLFCN_BIND,DSO_R_SYM_FAILURE);
-               return(0);
+               DSOerr(DSO_F_DLFCN_BIND_VAR,DSO_R_SYM_FAILURE);
+               ERR_add_error_data(4, "symname(", symname, "): ", dlerror());
+               return(NULL);
                }
-       *symptr = sym;
-       return(1);
+       return(sym);
        }
 
-static long dlfcn_ctrl(DSO *dso, int cmd, long larg, void *parg)
+static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname)
        {
-       if(dso == NULL)
+       void *ptr;
+       DSO_FUNC_TYPE sym;
+
+       if((dso == NULL) || (symname == NULL))
                {
-               DSOerr(DSO_F_DLFCN_CTRL,ERR_R_PASSED_NULL_PARAMETER);
-               return(-1);
+               DSOerr(DSO_F_DLFCN_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
+               return(NULL);
                }
-       switch(cmd)
+       if(sk_num(dso->meth_data) < 1)
                {
-       case DSO_CTRL_GET_FLAGS:
-               return dso->flags;
-       case DSO_CTRL_SET_FLAGS:
-               dso->flags = (int)larg;
-               return(0);
-       case DSO_CTRL_OR_FLAGS:
-               dso->flags |= (int)larg;
-               return(0);
-       default:
-               break;
+               DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_STACK_ERROR);
+               return(NULL);
+               }
+       ptr = (void *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
+       if(ptr == NULL)
+               {
+               DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_NULL_HANDLE);
+               return(NULL);
+               }
+       sym = (DSO_FUNC_TYPE)dlsym(ptr, symname);
+       if(sym == NULL)
+               {
+               DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_SYM_FAILURE);
+               ERR_add_error_data(4, "symname(", symname, "): ", dlerror());
+               return(NULL);
+               }
+       return(sym);
+       }
+
+static char *dlfcn_name_converter(DSO *dso, const char *filename)
+       {
+       char *translated;
+       int len, rsize, transform;
+
+       len = strlen(filename);
+       rsize = len + 1;
+       transform = (strstr(filename, "/") == NULL);
+       if(transform)
+               {
+               /* We will convert this to "%s.so" or "lib%s.so" */
+               rsize += 3;     /* The length of ".so" */
+               if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
+                       rsize += 3; /* The length of "lib" */
                }
-       DSOerr(DSO_F_DLFCN_CTRL,DSO_R_UNKNOWN_COMMAND);
-       return(-1);
+       translated = OPENSSL_malloc(rsize);
+       if(translated == NULL)
+               {
+               DSOerr(DSO_F_DLFCN_NAME_CONVERTER,
+                               DSO_R_NAME_TRANSLATION_FAILED);
+               return(NULL);
+               }
+       if(transform)
+               {
+               if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
+                       sprintf(translated, "lib%s.so", filename);
+               else
+                       sprintf(translated, "%s.so", filename);
+               }
+       else
+               sprintf(translated, "%s", filename);
+       return(translated);
        }
 
 #endif /* DSO_DLFCN */