1: /*************************************************************************
2: * (C) 2013 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
3: * by Michael Pounov <misho@elwix.org>
4: *
5: * $Author: misho $
6: * $Id: apack.h,v 1.6 2014/02/10 22:50:44 misho Exp $
7: *
8: **************************************************************************
9: The ELWIX and AITNET software is distributed under the following
10: terms:
11:
12: All of the documentation and software included in the ELWIX and AITNET
13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
14:
15: Copyright 2004 - 2014
16: by Michael Pounov <misho@elwix.org>. All rights reserved.
17:
18: Redistribution and use in source and binary forms, with or without
19: modification, are permitted provided that the following conditions
20: are met:
21: 1. Redistributions of source code must retain the above copyright
22: notice, this list of conditions and the following disclaimer.
23: 2. Redistributions in binary form must reproduce the above copyright
24: notice, this list of conditions and the following disclaimer in the
25: documentation and/or other materials provided with the distribution.
26: 3. All advertising materials mentioning features or use of this software
27: must display the following acknowledgement:
28: This product includes software developed by Michael Pounov <misho@elwix.org>
29: ELWIX - Embedded LightWeight unIX and its contributors.
30: 4. Neither the name of AITNET nor the names of its contributors
31: may be used to endorse or promote products derived from this software
32: without specific prior written permission.
33:
34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37: ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44: SUCH DAMAGE.
45: */
46: #ifndef __APACK_H
47: #define __APACK_H
48:
49:
50: typedef struct tagRawPacket {
51: size_t r_len;
52: uint8_t *r_buf;
53: uint8_t *r_next;
54: } rpack_t;
55:
56: #define RPACK_INITIALIZER { .r_len = 0, .r_buf = NULL, .r_next = NULL }
57: #define RPACK_FREE(x) (assert((x)), memset((x), 0, sizeof(rpack_t)))
58: #define RPACK_INIT(x, b, l) do { assert((x)); RPACK_FREE(x); \
59: (x)->r_buf = (b); \
60: (x)->r_len = (l); \
61: (x)->r_next = (x)->r_buf; \
62: } while (0)
63: #define RPACK_SANITY(x) ((x) && (x)->r_buf && (x)->r_next && (x)->r_next >= (x)->r_buf)
64: #define RPACK_LEN(x) (assert((x)), (x)->r_len)
65: #define RPACK_REWIND(x) (assert((x)), (x)->r_next = (x)->r_buf)
66:
67: #define RPACK_SET_16(x, n) do { assert((x)); \
68: *((uint8_t *) (x) + 1) = *((const uint8_t *) (n) + 1); \
69: *((uint8_t *) (x) + 0) = *((const uint8_t *) (n) + 0); \
70: } while (0)
71: #define RPACK_SET_24(x, n) do { assert((x)); \
72: *((uint8_t *) (x) + 2) = *((const uint8_t *) (n) + 2); \
73: *((uint8_t *) (x) + 1) = *((const uint8_t *) (n) + 1); \
74: *((uint8_t *) (x) + 0) = *((const uint8_t *) (n) + 0); \
75: } while (0)
76: #define RPACK_SET_32(x, n) do { assert((x)); \
77: *((uint8_t *) (x) + 3) = *((const uint8_t *) (n) + 3); \
78: *((uint8_t *) (x) + 2) = *((const uint8_t *) (n) + 2); \
79: *((uint8_t *) (x) + 1) = *((const uint8_t *) (n) + 1); \
80: *((uint8_t *) (x) + 0) = *((const uint8_t *) (n) + 0); \
81: } while (0)
82: #define RPACK_SET_64(x, n) do { assert((x)); \
83: *((uint8_t *) (x) + 7) = *((const uint8_t *) (n) + 7); \
84: *((uint8_t *) (x) + 6) = *((const uint8_t *) (n) + 6); \
85: *((uint8_t *) (x) + 5) = *((const uint8_t *) (n) + 5); \
86: *((uint8_t *) (x) + 4) = *((const uint8_t *) (n) + 4); \
87: *((uint8_t *) (x) + 3) = *((const uint8_t *) (n) + 3); \
88: *((uint8_t *) (x) + 2) = *((const uint8_t *) (n) + 2); \
89: *((uint8_t *) (x) + 1) = *((const uint8_t *) (n) + 1); \
90: *((uint8_t *) (x) + 0) = *((const uint8_t *) (n) + 0); \
91: } while (0)
92:
93: #define EXTRACT_LE_8(x) (assert((x)), *(x))
94: #define EXTRACT_LE_16(x) (assert((x)), (u_int16_t) ( \
95: (uint16_t) *((const uint8_t *) (x) + 1) << 8 | \
96: (uint16_t) *((const uint8_t *) (x) + 0) \
97: ))
98: #define EXTRACT_LE_24(x) (assert((x)), (u_int32_t) ( \
99: (uint32_t) *((const uint8_t *) (x) + 2) << 16 | \
100: (uint32_t) *((const uint8_t *) (x) + 1) << 8 | \
101: (uint32_t) *((const uint8_t *) (x) + 0) \
102: ))
103: #define EXTRACT_LE_32(x) (assert((x)), (u_int32_t) ( \
104: (uint32_t) *((const uint8_t *) (x) + 3) << 24 | \
105: (uint32_t) *((const uint8_t *) (x) + 2) << 16 | \
106: (uint32_t) *((const uint8_t *) (x) + 1) << 8 | \
107: (uint32_t) *((const uint8_t *) (x) + 0) \
108: ))
109: #define EXTRACT_LE_64(x) (assert((x)), (u_int64_t) ( \
110: (uint64_t) *((const uint8_t *) (x) + 7) << 56 | \
111: (uint64_t) *((const uint8_t *) (x) + 6) << 48 | \
112: (uint64_t) *((const uint8_t *) (x) + 5) << 40 | \
113: (uint64_t) *((const uint8_t *) (x) + 4) << 32 | \
114: (uint64_t) *((const uint8_t *) (x) + 3) << 24 | \
115: (uint64_t) *((const uint8_t *) (x) + 2) << 16 | \
116: (uint64_t) *((const uint8_t *) (x) + 1) << 8 | \
117: (uint64_t) *((const uint8_t *) (x) + 0) \
118: ))
119:
120: #define EXTRACT_BE_8(x) (assert((x)), *(x))
121: #define EXTRACT_BE_16(x) (assert((x)), (u_int16_t) ( \
122: (uint16_t) *((const uint8_t *) (x) + 0) << 8 | \
123: (uint16_t) *((const uint8_t *) (x) + 1) \
124: ))
125: #define EXTRACT_BE_24(x) (assert((x)), (u_int32_t) ( \
126: (uint32_t) *((const uint8_t *) (x) + 0) << 16 | \
127: (uint32_t) *((const uint8_t *) (x) + 1) << 8 | \
128: (uint32_t) *((const uint8_t *) (x) + 2) \
129: ))
130: #define EXTRACT_BE_32(x) (assert((x)), (u_int32_t) ( \
131: (uint32_t) *((const uint8_t *) (x) + 0) << 24 | \
132: (uint32_t) *((const uint8_t *) (x) + 1) << 16 | \
133: (uint32_t) *((const uint8_t *) (x) + 2) << 8 | \
134: (uint32_t) *((const uint8_t *) (x) + 3) \
135: ))
136: #define EXTRACT_BE_64(x) (assert((x)), (u_int64_t) ( \
137: (uint64_t) *((const uint8_t *) (x) + 0) << 56 | \
138: (uint64_t) *((const uint8_t *) (x) + 1) << 48 | \
139: (uint64_t) *((const uint8_t *) (x) + 2) << 40 | \
140: (uint64_t) *((const uint8_t *) (x) + 3) << 32 | \
141: (uint64_t) *((const uint8_t *) (x) + 4) << 24 | \
142: (uint64_t) *((const uint8_t *) (x) + 5) << 16 | \
143: (uint64_t) *((const uint8_t *) (x) + 6) << 8 | \
144: (uint64_t) *((const uint8_t *) (x) + 7) \
145: ))
146:
147:
148: /*
149: * rpack_align_and_reserve() - Align & reserve space
150: *
151: * @rp = raw buffer
152: * @siz = need size
153: * return: NULL error or not enough space, !=NULL next position
154: */
155: uint8_t *rpack_align_and_reserve(rpack_t * __restrict rp, size_t siz);
156:
157: /*
158: * rpack_create() - Allocate & init raw packet structure
159: *
160: * @buf = buffer
161: * @buflen = length of buffer
162: * return: NULL error or !=NULL raw packet, should be freed by rpack_destroy()
163: */
164: rpack_t *rpack_create(void * __restrict buf, size_t buflen);
165: /*
166: * rpack_destroy() - Release & free raw packet structure
167: *
168: * @rp = raw packet
169: * return: none
170: */
171: void rpack_destroy(rpack_t ** __restrict rp);
172:
173: /*
174: * rpack_uint8() - Pack/Unpack 8bit value
175: *
176: * @rp = raw buffer
177: * @n = set value if !=NULL
178: * return: -1 error or get value
179: */
180: uint8_t rpack_uint8(rpack_t * __restrict rp, uint8_t * __restrict n);
181: /*
182: * rpack_uint16() - Pack/Unpack 16bit value
183: *
184: * @rp = raw buffer
185: * @n = set value if !=NULL
186: * @be = extract in big-endian
187: * return: -1 error or get value
188: */
189: uint16_t rpack_uint16(rpack_t * __restrict rp, uint16_t * __restrict n, int be);
190: /*
191: * rpack_uint24() - Pack/Unpack 24bit value
192: *
193: * @rp = raw buffer
194: * @n = set value if !=NULL
195: * @be = extract in big-endian
196: * return: -1 error or get value
197: */
198: uint32_t rpack_uint24(rpack_t * __restrict rp, uint32_t * __restrict n, int be);
199: /*
200: * rpack_uint32() - Pack/Unpack 32bit value
201: *
202: * @rp = raw buffer
203: * @n = set value if !=NULL
204: * @be = extract in big-endian
205: * return: -1 error or get value
206: */
207: uint32_t rpack_uint32(rpack_t * __restrict rp, uint32_t * __restrict n, int be);
208: /*
209: * rpack_uint64() - Pack/Unpack 64bit value
210: *
211: * @rp = raw buffer
212: * @n = set value if !=NULL
213: * @be = extract in big-endian
214: * return: -1 error or get value
215: */
216: uint64_t rpack_uint64(rpack_t * __restrict rp, uint64_t * __restrict n, int be);
217:
218:
219: #endif
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