Mercurial > dropbear
annotate circbuffer.c @ 1844:7a3cd7b598d8
github action, don't try apt or python on macos
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Mon, 18 Oct 2021 23:31:23 +0800 |
parents | 06d52bcb8094 |
children |
rev | line source |
---|---|
108
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1 /* |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
2 * Dropbear SSH |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
3 * |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
4 * Copyright (c) 2002-2004 Matt Johnston |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
5 * All rights reserved. |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
6 * |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
7 * Permission is hereby granted, free of charge, to any person obtaining a copy |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
8 * of this software and associated documentation files (the "Software"), to deal |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
9 * in the Software without restriction, including without limitation the rights |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
11 * copies of the Software, and to permit persons to whom the Software is |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
12 * furnished to do so, subject to the following conditions: |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
13 * |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
14 * The above copyright notice and this permission notice shall be included in |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
15 * all copies or substantial portions of the Software. |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
16 * |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
23 * SOFTWARE. */ |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
24 |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
25 #include "includes.h" |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
26 #include "dbutil.h" |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
27 #include "circbuffer.h" |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
28 |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
29 #define MAX_CBUF_SIZE 100000000 |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
30 |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
31 circbuffer * cbuf_new(unsigned int size) { |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
32 |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
33 circbuffer *cbuf = NULL; |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
34 |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
35 if (size > MAX_CBUF_SIZE) { |
594
a98a2138364a
Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents:
241
diff
changeset
|
36 dropbear_exit("Bad cbuf size"); |
108
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
37 } |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
38 |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
39 cbuf = (circbuffer*)m_malloc(sizeof(circbuffer)); |
1167
1397a677cb5c
lazy allocation of circbuffer
Matt Johnston <matt@ucc.asn.au>
parents:
1079
diff
changeset
|
40 /* data is malloced on first write */ |
1397a677cb5c
lazy allocation of circbuffer
Matt Johnston <matt@ucc.asn.au>
parents:
1079
diff
changeset
|
41 cbuf->data = NULL; |
108
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
42 cbuf->used = 0; |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
43 cbuf->readpos = 0; |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
44 cbuf->writepos = 0; |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
45 cbuf->size = size; |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
46 |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
47 return cbuf; |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
48 } |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
49 |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
50 void cbuf_free(circbuffer * cbuf) { |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
51 |
1167
1397a677cb5c
lazy allocation of circbuffer
Matt Johnston <matt@ucc.asn.au>
parents:
1079
diff
changeset
|
52 if (cbuf->data) { |
1397a677cb5c
lazy allocation of circbuffer
Matt Johnston <matt@ucc.asn.au>
parents:
1079
diff
changeset
|
53 m_burn(cbuf->data, cbuf->size); |
1397a677cb5c
lazy allocation of circbuffer
Matt Johnston <matt@ucc.asn.au>
parents:
1079
diff
changeset
|
54 m_free(cbuf->data); |
1397a677cb5c
lazy allocation of circbuffer
Matt Johnston <matt@ucc.asn.au>
parents:
1079
diff
changeset
|
55 } |
108
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
56 m_free(cbuf); |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
57 } |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
58 |
1459
06d52bcb8094
Pointer parameter could be declared as pointing to const
Francois Perrad <francois.perrad@gadz.org>
parents:
1167
diff
changeset
|
59 unsigned int cbuf_getused(const circbuffer * cbuf) { |
108
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
60 |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
61 return cbuf->used; |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
62 |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
63 } |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
64 |
1459
06d52bcb8094
Pointer parameter could be declared as pointing to const
Francois Perrad <francois.perrad@gadz.org>
parents:
1167
diff
changeset
|
65 unsigned int cbuf_getavail(const circbuffer * cbuf) { |
108
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
66 |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
67 return cbuf->size - cbuf->used; |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
68 |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
69 } |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
70 |
1459
06d52bcb8094
Pointer parameter could be declared as pointing to const
Francois Perrad <francois.perrad@gadz.org>
parents:
1167
diff
changeset
|
71 unsigned int cbuf_writelen(const circbuffer *cbuf) { |
108
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
72 |
241
c5d3ef11155f
* use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
73 dropbear_assert(cbuf->used <= cbuf->size); |
c5d3ef11155f
* use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
74 dropbear_assert(((2*cbuf->size)+cbuf->writepos-cbuf->readpos)%cbuf->size == cbuf->used%cbuf->size); |
c5d3ef11155f
* use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
75 dropbear_assert(((2*cbuf->size)+cbuf->readpos-cbuf->writepos)%cbuf->size == (cbuf->size-cbuf->used)%cbuf->size); |
108
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
76 |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
77 if (cbuf->used == cbuf->size) { |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
108
diff
changeset
|
78 TRACE(("cbuf_writelen: full buffer")) |
108
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
79 return 0; /* full */ |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
80 } |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
81 |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
82 if (cbuf->writepos < cbuf->readpos) { |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
83 return cbuf->readpos - cbuf->writepos; |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
84 } |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
85 |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
86 return cbuf->size - cbuf->writepos; |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
87 } |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
88 |
1459
06d52bcb8094
Pointer parameter could be declared as pointing to const
Francois Perrad <francois.perrad@gadz.org>
parents:
1167
diff
changeset
|
89 void cbuf_readptrs(const circbuffer *cbuf, |
1054
c71df09bc610
Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents:
709
diff
changeset
|
90 unsigned char **p1, unsigned int *len1, |
c71df09bc610
Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents:
709
diff
changeset
|
91 unsigned char **p2, unsigned int *len2) { |
c71df09bc610
Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents:
709
diff
changeset
|
92 *p1 = &cbuf->data[cbuf->readpos]; |
c71df09bc610
Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents:
709
diff
changeset
|
93 *len1 = MIN(cbuf->used, cbuf->size - cbuf->readpos); |
c71df09bc610
Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents:
709
diff
changeset
|
94 |
c71df09bc610
Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents:
709
diff
changeset
|
95 if (*len1 < cbuf->used) { |
c71df09bc610
Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents:
709
diff
changeset
|
96 *p2 = cbuf->data; |
c71df09bc610
Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents:
709
diff
changeset
|
97 *len2 = cbuf->used - *len1; |
c71df09bc610
Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents:
709
diff
changeset
|
98 } else { |
c71df09bc610
Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents:
709
diff
changeset
|
99 *p2 = NULL; |
c71df09bc610
Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents:
709
diff
changeset
|
100 *len2 = 0; |
c71df09bc610
Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents:
709
diff
changeset
|
101 } |
c71df09bc610
Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents:
709
diff
changeset
|
102 } |
c71df09bc610
Avoid copying data into circular buffer
Matt Johnston <matt@ucc.asn.au>
parents:
709
diff
changeset
|
103 |
108
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
104 unsigned char* cbuf_writeptr(circbuffer *cbuf, unsigned int len) { |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
105 |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
106 if (len > cbuf_writelen(cbuf)) { |
594
a98a2138364a
Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents:
241
diff
changeset
|
107 dropbear_exit("Bad cbuf write"); |
108
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
108 } |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
109 |
1167
1397a677cb5c
lazy allocation of circbuffer
Matt Johnston <matt@ucc.asn.au>
parents:
1079
diff
changeset
|
110 if (!cbuf->data) { |
1397a677cb5c
lazy allocation of circbuffer
Matt Johnston <matt@ucc.asn.au>
parents:
1079
diff
changeset
|
111 /* lazy allocation */ |
1397a677cb5c
lazy allocation of circbuffer
Matt Johnston <matt@ucc.asn.au>
parents:
1079
diff
changeset
|
112 cbuf->data = (unsigned char*)m_malloc(cbuf->size); |
1397a677cb5c
lazy allocation of circbuffer
Matt Johnston <matt@ucc.asn.au>
parents:
1079
diff
changeset
|
113 } |
1397a677cb5c
lazy allocation of circbuffer
Matt Johnston <matt@ucc.asn.au>
parents:
1079
diff
changeset
|
114 |
108
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
115 return &cbuf->data[cbuf->writepos]; |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
116 } |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
117 |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
118 void cbuf_incrwrite(circbuffer *cbuf, unsigned int len) { |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
119 if (len > cbuf_writelen(cbuf)) { |
594
a98a2138364a
Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents:
241
diff
changeset
|
120 dropbear_exit("Bad cbuf write"); |
108
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
121 } |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
122 |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
123 cbuf->used += len; |
241
c5d3ef11155f
* use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
124 dropbear_assert(cbuf->used <= cbuf->size); |
108
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
125 cbuf->writepos = (cbuf->writepos + len) % cbuf->size; |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
126 } |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
127 |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
128 |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
129 void cbuf_incrread(circbuffer *cbuf, unsigned int len) { |
241
c5d3ef11155f
* use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents:
165
diff
changeset
|
130 dropbear_assert(cbuf->used >= len); |
108
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
131 cbuf->used -= len; |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
132 cbuf->readpos = (cbuf->readpos + len) % cbuf->size; |
10f4d3319780
- added circular buffering for channels
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
133 } |