2 * This file is part of secnet.
3 * See README for full list of copyright holders.
5 * secnet is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 3 of the License, or
8 * (at your option) any later version.
10 * secnet is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * version 3 along with secnet; if not, see
17 * https://www.gnu.org/licenses/gpl.html.
26 /* Parts of the secnet key-exchange protocol require access to
27 unaligned big-endian quantities in buffers. These macros provide
28 convenient access, even on architectures that don't support unaligned
31 #define put_uint32(a,v) do { (a)[0]=(v)>>24; (a)[1]=((v)&0xff0000)>>16; \
32 (a)[2]=((v)&0xff00)>>8; (a)[3]=(v)&0xff; } while(0)
34 #define put_uint16(a,v) do {(a)[0]=((v)&0xff00)>>8; (a)[1]=(v)&0xff;} while(0)
36 #define put_uint8(a,v) do {(a)[0]=((v)&0xff);} while(0)
38 #define get_uint32(a) \
39 (((uint32_t)(a)[0]<<24) | ((uint32_t)(a)[1]<<16) | \
40 ((uint32_t)(a)[2]<<8) | (uint32_t)(a)[3])
42 #define get_uint16(a) (((uint16_t)(a)[0]<<8)|(uint16_t)(a)[1])
44 #define get_uint8(a) (((uint8_t)(a)[0]))
46 #define UNALIGNED_DEF_FORTYPE(type,appre) \
47 static inline void buf_##appre##_##type(struct buffer_if *buf, type##_t v) \
49 uint8_t *c=buf_##appre(buf,sizeof(type##_t)); \
52 static inline type##_t buf_un##appre##_##type(struct buffer_if *buf) \
54 const uint8_t *c=buf_un##appre(buf,sizeof(type##_t)); \
55 return get_##type(c); \
58 UNALIGNED_DEF_FORTYPE(uint32,append)
59 UNALIGNED_DEF_FORTYPE(uint16,append)
60 UNALIGNED_DEF_FORTYPE(uint8,append)
61 UNALIGNED_DEF_FORTYPE(uint32,prepend)
62 UNALIGNED_DEF_FORTYPE(uint16,prepend)
63 UNALIGNED_DEF_FORTYPE(uint8,prepend)
65 #endif /* unaligned_h */