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1 /*
2  * Copyright (c) 2016 Fabien Siron <fabien.siron@epita.fr>
3  * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
4  * Copyright (c) 2016-2017 The strace developers.
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. The name of the author may not be used to endorse or promote products
16  *    derived from this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28  */
29 
30 #ifndef STRACE_NLATTR_H
31 #define STRACE_NLATTR_H
32 
33 typedef bool (*nla_decoder_t)(struct tcb *, kernel_ulong_t addr,
34 			      kernel_ulong_t len, const void *opaque_data);
35 extern void
36 decode_nlattr(struct tcb *,
37 	      kernel_ulong_t addr,
38 	      kernel_ulong_t len,
39 	      const struct xlat *,
40 	      const char *dflt,
41 	      const nla_decoder_t *,
42 	      unsigned int size,
43 	      const void *opaque_data);
44 
45 #define DECL_NLA(name)					\
46 extern bool						\
47 decode_nla_ ## name(struct tcb *, kernel_ulong_t addr,	\
48 		    kernel_ulong_t len, const void *)
49 DECL_NLA(u8);
50 DECL_NLA(u16);
51 DECL_NLA(u32);
52 DECL_NLA(u64);
53 DECL_NLA(s8);
54 DECL_NLA(s16);
55 DECL_NLA(s32);
56 DECL_NLA(s64);
57 DECL_NLA(str);
58 DECL_NLA(strn);
59 
60 #endif /* !STRACE_NLATTR_H */
61