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 1.12 2025/08/21 15:43:00 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 - 2024
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_BUF(x) (assert((x)), (x)->r_buf)
65: #define RPACK_NEXT(x) (assert((x)), (x)->r_next)
66: #define RPACK_LEN(x) (assert((x)), (x)->r_len)
67: #define RPACK_REWIND(x) (assert((x)), (x)->r_next = (x)->r_buf)
68: #define RPACK_OFF(x) (assert((x)), (x)->r_next - (x)->r_buf)
69: #define RPACK_REMAIN(x) (assert((x)), (x)->r_len - ((x)->r_next - (x)->r_buf))
70: #define RPACK_ISEND(x) (assert((x)), (size_t) ((x)->r_next - (x)->r_buf) >= (x)->r_len)
71: #define RPACK_WHEREAMI(x, nx) (assert((x)), (size_t) (((uint8_t*)(nx)) - (x)->r_buf))
72:
73: #define RPACK_SET_16(x, n) do { assert((x)); \
74: *((uint8_t *) (x) + 1) = *((const uint8_t *) (n) + 1); \
75: *((uint8_t *) (x) + 0) = *((const uint8_t *) (n) + 0); \
76: } while (0)
77: #define RPACK_SET_24(x, n) do { assert((x)); \
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_32(x, n) do { assert((x)); \
83: *((uint8_t *) (x) + 3) = *((const uint8_t *) (n) + 3); \
84: *((uint8_t *) (x) + 2) = *((const uint8_t *) (n) + 2); \
85: *((uint8_t *) (x) + 1) = *((const uint8_t *) (n) + 1); \
86: *((uint8_t *) (x) + 0) = *((const uint8_t *) (n) + 0); \
87: } while (0)
88: #define RPACK_SET_64(x, n) do { assert((x)); \
89: *((uint8_t *) (x) + 7) = *((const uint8_t *) (n) + 7); \
90: *((uint8_t *) (x) + 6) = *((const uint8_t *) (n) + 6); \
91: *((uint8_t *) (x) + 5) = *((const uint8_t *) (n) + 5); \
92: *((uint8_t *) (x) + 4) = *((const uint8_t *) (n) + 4); \
93: *((uint8_t *) (x) + 3) = *((const uint8_t *) (n) + 3); \
94: *((uint8_t *) (x) + 2) = *((const uint8_t *) (n) + 2); \
95: *((uint8_t *) (x) + 1) = *((const uint8_t *) (n) + 1); \
96: *((uint8_t *) (x) + 0) = *((const uint8_t *) (n) + 0); \
97: } while (0)
98:
99: #define EXTRACT_LE_8(x) (assert((x)), *(x))
100: #define EXTRACT_LE_16(x) (assert((x)), (u_int16_t) ( \
101: (uint16_t) *((const uint8_t *) (x) + 1) << 8 | \
102: (uint16_t) *((const uint8_t *) (x) + 0) \
103: ))
104: #define EXTRACT_LE_24(x) (assert((x)), (u_int32_t) ( \
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_32(x) (assert((x)), (u_int32_t) ( \
110: (uint32_t) *((const uint8_t *) (x) + 3) << 24 | \
111: (uint32_t) *((const uint8_t *) (x) + 2) << 16 | \
112: (uint32_t) *((const uint8_t *) (x) + 1) << 8 | \
113: (uint32_t) *((const uint8_t *) (x) + 0) \
114: ))
115: #define EXTRACT_LE_64(x) (assert((x)), (u_int64_t) ( \
116: (uint64_t) *((const uint8_t *) (x) + 7) << 56 | \
117: (uint64_t) *((const uint8_t *) (x) + 6) << 48 | \
118: (uint64_t) *((const uint8_t *) (x) + 5) << 40 | \
119: (uint64_t) *((const uint8_t *) (x) + 4) << 32 | \
120: (uint64_t) *((const uint8_t *) (x) + 3) << 24 | \
121: (uint64_t) *((const uint8_t *) (x) + 2) << 16 | \
122: (uint64_t) *((const uint8_t *) (x) + 1) << 8 | \
123: (uint64_t) *((const uint8_t *) (x) + 0) \
124: ))
125:
126: #define EXTRACT_BE_8(x) (assert((x)), *(x))
127: #define EXTRACT_BE_16(x) (assert((x)), (u_int16_t) ( \
128: (uint16_t) *((const uint8_t *) (x) + 0) << 8 | \
129: (uint16_t) *((const uint8_t *) (x) + 1) \
130: ))
131: #define EXTRACT_BE_24(x) (assert((x)), (u_int32_t) ( \
132: (uint32_t) *((const uint8_t *) (x) + 0) << 16 | \
133: (uint32_t) *((const uint8_t *) (x) + 1) << 8 | \
134: (uint32_t) *((const uint8_t *) (x) + 2) \
135: ))
136: #define EXTRACT_BE_32(x) (assert((x)), (u_int32_t) ( \
137: (uint32_t) *((const uint8_t *) (x) + 0) << 24 | \
138: (uint32_t) *((const uint8_t *) (x) + 1) << 16 | \
139: (uint32_t) *((const uint8_t *) (x) + 2) << 8 | \
140: (uint32_t) *((const uint8_t *) (x) + 3) \
141: ))
142: #define EXTRACT_BE_64(x) (assert((x)), (u_int64_t) ( \
143: (uint64_t) *((const uint8_t *) (x) + 0) << 56 | \
144: (uint64_t) *((const uint8_t *) (x) + 1) << 48 | \
145: (uint64_t) *((const uint8_t *) (x) + 2) << 40 | \
146: (uint64_t) *((const uint8_t *) (x) + 3) << 32 | \
147: (uint64_t) *((const uint8_t *) (x) + 4) << 24 | \
148: (uint64_t) *((const uint8_t *) (x) + 5) << 16 | \
149: (uint64_t) *((const uint8_t *) (x) + 6) << 8 | \
150: (uint64_t) *((const uint8_t *) (x) + 7) \
151: ))
152:
153:
154: #ifdef __cplusplus
155: extern "C" {
156: #endif
157:
158: /*
159: * rpack_align_and_reserve() - Align & reserve space
160: *
161: * @rp = raw buffer
162: * @siz = need size
163: * return: NULL error or not enough space, !=NULL next position
164: */
165: uint8_t *rpack_align_and_reserve(rpack_t * __restrict rp, size_t siz);
166: /*
167: * rpack_next() - Get and set current position
168: *
169: * @rp = raw packet
170: * @after_len = move aligned current position after length
171: * return: NULL error or current position
172: */
173: uint8_t *rpack_next(rpack_t * __restrict rp, size_t after_len);
174: /*
175: * rpack_rnext() - Get and set raw current position
176: *
177: * @rp = raw packet
178: * @after_len = !=0 move current position after length
179: * return: NULL error or raw current position
180: */
181: uint8_t *rpack_rnext(rpack_t * __restrict rp, size_t after_len);
182:
183: /*
184: * rpack_create() - Allocate & init raw packet structure
185: *
186: * @buf = buffer
187: * @buflen = length of buffer
188: * return: NULL error or !=NULL raw packet, should be freed by rpack_destroy()
189: */
190: rpack_t *rpack_create(void * __restrict buf, size_t buflen);
191: /*
192: * rpack_destroy() - Release & free raw packet structure
193: *
194: * @rp = raw packet
195: * return: none
196: */
197: void rpack_destroy(rpack_t ** __restrict rp);
198:
199: /*
200: * rpack_attach() - Attach dynamic allocating buffer at packet
201: *
202: * @rp = raw packet;
203: * @len = allocate bytes
204: * return: -1 error or 0 ok, should be detached with rpack_detach()
205: * before call rpack_destroy() after use!
206: */
207: int rpack_attach(rpack_t * __restrict rp, size_t len);
208: /*
209: * rpack_resize() - Resize dynamic allocated buffer at packet
210: *
211: * @rp = raw packet
212: * @newlen = resize buffer to bytes
213: * return: -1 error or 0 ok, should be detached with rpack_detach()
214: * before call rpack_destroy() after use!
215: */
216: int rpack_resize(rpack_t * __restrict rp, size_t newlen);
217: /*
218: * rpack_detach() - Detach and free dynamic allocated buffer from packet
219: *
220: * @rp = raw packet
221: * return: none
222: */
223: void rpack_detach(rpack_t * __restrict rp);
224:
225: /*
226: * rpack_uint8() - Pack/Unpack 8bit value
227: *
228: * @rp = raw buffer
229: * @n = set value if !=NULL
230: * return: -1 error or get value
231: */
232: uint8_t rpack_uint8(rpack_t * __restrict rp, uint8_t * __restrict n);
233: /*
234: * rpack_uint16() - Pack/Unpack 16bit value
235: *
236: * @rp = raw buffer
237: * @n = set value if !=NULL
238: * @be = byte order [-1 little endian, 1 big endian and 0 host order]
239: * return: -1 error or get value
240: */
241: uint16_t rpack_uint16(rpack_t * __restrict rp, uint16_t * __restrict n, int be);
242: /*
243: * rpack_ruint16() - Pack/Unpack raw 16bit value
244: *
245: * @rp = raw buffer
246: * @n = set value if !=NULL
247: * @be = byte order [-1 little endian, 1 big endian and 0 host order]
248: * return: -1 error or get value
249: */
250: uint16_t rpack_ruint16(rpack_t * __restrict rp, uint16_t * __restrict n, int be);
251: /*
252: * rpack_uint24() - Pack/Unpack 24bit value
253: *
254: * @rp = raw buffer
255: * @n = set value if !=NULL
256: * @be = byte order [-1 little endian, 1 big endian and 0 host order]
257: * return: -1 error or get value
258: */
259: uint32_t rpack_uint24(rpack_t * __restrict rp, uint32_t * __restrict n, int be);
260: /*
261: * rpack_ruint24() - Pack/Unpack raw 24bit value
262: *
263: * @rp = raw buffer
264: * @n = set value if !=NULL
265: * @be = byte order [-1 little endian, 1 big endian and 0 host order]
266: * return: -1 error or get value
267: */
268: uint32_t rpack_ruint24(rpack_t * __restrict rp, uint32_t * __restrict n, int be);
269: /*
270: * rpack_uint32() - Pack/Unpack 32bit value
271: *
272: * @rp = raw buffer
273: * @n = set value if !=NULL
274: * @be = byte order [-1 little endian, 1 big endian and 0 host order]
275: * return: -1 error or get value
276: */
277: uint32_t rpack_uint32(rpack_t * __restrict rp, uint32_t * __restrict n, int be);
278: /*
279: * rpack_ruint32() - Pack/Unpack raw 32bit value
280: *
281: * @rp = raw buffer
282: * @n = set value if !=NULL
283: * @be = byte order [-1 little endian, 1 big endian and 0 host order]
284: * return: -1 error or get value
285: */
286: uint32_t rpack_ruint32(rpack_t * __restrict rp, uint32_t * __restrict n, int be);
287: /*
288: * rpack_uint64() - Pack/Unpack 64bit value
289: *
290: * @rp = raw buffer
291: * @n = set value if !=NULL
292: * @be = byte order [-1 little endian, 1 big endian and 0 host order]
293: * return: -1 error or get value
294: */
295: uint64_t rpack_uint64(rpack_t * __restrict rp, uint64_t * __restrict n, int be);
296: /*
297: * rpack_ruint64() - Pack/Unpack raw 64bit value
298: *
299: * @rp = raw buffer
300: * @n = set value if !=NULL
301: * @be = byte order [-1 little endian, 1 big endian and 0 host order]
302: * return: -1 error or get value
303: */
304: uint64_t rpack_ruint64(rpack_t * __restrict rp, uint64_t * __restrict n, int be);
305: /*
306: * rpack_data() - Pack/Unpack align data
307: *
308: * @rp = raw buffer
309: * @dat = data
310: * @datlen = data length
311: * return: NULL error or != NULL get data, must be e_free() after use!
312: */
313: void *rpack_data(rpack_t * __restrict rp, void * __restrict dat, size_t datlen);
314: /*
315: * rpack_rdata() - Pack/Unpack raw data
316: *
317: * @rp = raw buffer
318: * @dat = data
319: * @datlen = data length
320: * return: NULL error or != NULL get data, must be e_free() after use!
321: */
322: void *rpack_rdata(rpack_t * __restrict rp, void * __restrict dat, size_t datlen);
323:
324: #ifdef __cplusplus
325: }
326: #endif
327:
328: #endif
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