2 /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
61 #include <openssl/dso.h>
64 DSO_METHOD *DSO_METHOD_dlfcn(void)
74 static int dlfcn_load(DSO *dso, char *filename);
75 static int dlfcn_unload(DSO *dso);
76 static int dlfcn_bind(DSO *dso, char *symname, void **symptr);
78 static int dlfcn_unbind(DSO *dso, char *symname, void *symptr);
79 static int dlfcn_init(DSO *dso);
80 static int dlfcn_finish(DSO *dso);
83 static DSO_METHOD dso_meth_dlfcn = {
84 "OpenSSL 'dlfcn' shared library method",
88 /* For now, "unbind" doesn't exist */
96 DSO_METHOD *DSO_METHOD_dlfcn(void)
98 return(&dso_meth_dlfcn);
101 /* For this DSO_METHOD, our meth_data STACK will contain;
102 * (i) the handle (void*) returned from dlopen().
105 static int dlfcn_load(DSO *dso, char *filename)
109 ptr = dlopen(filename, RTLD_NOW);
112 DSOerr(DSO_F_DLFCN_LOAD,DSO_R_LOAD_FAILED);
115 if(!sk_push(dso->meth_data, (char *)ptr))
117 DSOerr(DSO_F_DLFCN_LOAD,DSO_R_STACK_ERROR);
124 static int dlfcn_unload(DSO *dso)
129 DSOerr(DSO_F_DLFCN_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
132 if(sk_num(dso->meth_data) < 1)
134 DSOerr(DSO_F_DLFCN_UNLOAD,DSO_R_STACK_ERROR);
137 ptr = (void *)sk_pop(dso->meth_data);
140 DSOerr(DSO_F_DLFCN_UNLOAD,DSO_R_NULL_HANDLE);
141 /* Should push the value back onto the stack in
142 * case of a retry. */
143 sk_push(dso->meth_data, (char *)ptr);
146 /* For now I'm not aware of any errors associated with dlclose() */
151 static int dlfcn_bind(DSO *dso, char *symname, void **symptr)
155 if((dso == NULL) || (symptr == NULL) || (symname == NULL))
157 DSOerr(DSO_F_DLFCN_BIND,ERR_R_PASSED_NULL_PARAMETER);
160 if(sk_num(dso->meth_data) < 1)
162 DSOerr(DSO_F_DLFCN_BIND,DSO_R_STACK_ERROR);
165 ptr = (void *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
168 DSOerr(DSO_F_DLFCN_BIND,DSO_R_NULL_HANDLE);
171 sym = dlsym(ptr, symname);
174 DSOerr(DSO_F_DLFCN_BIND,DSO_R_SYM_FAILURE);
181 #endif /* DSO_DLFCN */