Annotation of embedaddon/libpdel/ppp/ppp_util.c, revision 1.1.1.1
1.1 misho 1:
2: /*
3: * Copyright (c) 2001-2002 Packet Design, LLC.
4: * All rights reserved.
5: *
6: * Subject to the following obligations and disclaimer of warranty,
7: * use and redistribution of this software, in source or object code
8: * forms, with or without modifications are expressly permitted by
9: * Packet Design; provided, however, that:
10: *
11: * (i) Any and all reproductions of the source or object code
12: * must include the copyright notice above and the following
13: * disclaimer of warranties; and
14: * (ii) No rights are granted, in any manner or form, to use
15: * Packet Design trademarks, including the mark "PACKET DESIGN"
16: * on advertising, endorsements, or otherwise except as such
17: * appears in the above copyright notice or in the software.
18: *
19: * THIS SOFTWARE IS BEING PROVIDED BY PACKET DESIGN "AS IS", AND
20: * TO THE MAXIMUM EXTENT PERMITTED BY LAW, PACKET DESIGN MAKES NO
21: * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING
22: * THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED
23: * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
24: * OR NON-INFRINGEMENT. PACKET DESIGN DOES NOT WARRANT, GUARANTEE,
25: * OR MAKE ANY REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS
26: * OF THE USE OF THIS SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY,
27: * RELIABILITY OR OTHERWISE. IN NO EVENT SHALL PACKET DESIGN BE
28: * LIABLE FOR ANY DAMAGES RESULTING FROM OR ARISING OUT OF ANY USE
29: * OF THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY DIRECT,
30: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE, OR CONSEQUENTIAL
31: * DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, LOSS OF
32: * USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY THEORY OF
33: * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
35: * THE USE OF THIS SOFTWARE, EVEN IF PACKET DESIGN IS ADVISED OF
36: * THE POSSIBILITY OF SUCH DAMAGE.
37: *
38: * Author: Archie Cobbs <archie@freebsd.org>
39: */
40:
41: #include "ppp/ppp_defs.h"
42: #include "ppp/ppp_util.h"
43:
44: #define PATH_RANDOM "/dev/urandom"
45:
46: /*
47: * Decode ASCII message
48: */
49: void
50: ppp_util_ascify(char *buf, size_t bsiz, const u_char *data, size_t len)
51: {
52: char *bp = buf;
53: int i;
54:
55: for (bp = buf, i = 0; i < len; i++) {
56: const char ch = (char)data[i];
57:
58: if (bsiz < 3)
59: break;
60: switch (ch) {
61: case '\t':
62: *bp++ = '\\';
63: *bp++ = 't';
64: bsiz -= 2;
65: break;
66: case '\n':
67: *bp++ = '\\';
68: *bp++ = 'n';
69: bsiz -= 2;
70: break;
71: case '\r':
72: *bp++ = '\\';
73: *bp++ = 'r';
74: bsiz -= 2;
75: break;
76: default:
77: if (isprint(ch & 0x7f)) {
78: *bp++ = ch;
79: bsiz--;
80: } else {
81: *bp++ = '^';
82: *bp++ = '@' + (ch & 0x1f);
83: bsiz -= 2;
84: }
85: break;
86: }
87: }
88: *bp = '\0';
89: }
90:
91: /*
92: * Generate random bytes
93: */
94: int
95: ppp_util_random(void *buf, size_t len)
96: {
97: int rlen;
98: int fd;
99:
100: if ((fd = open(PATH_RANDOM, O_RDONLY)) == -1)
101: return (-1);
102: rlen = read(fd, buf, len);
103: (void)close(fd);
104: if (rlen == -1)
105: return (-1);
106: if (rlen != len) {
107: errno = ENXIO;
108: return (-1);
109: }
110: return (0);
111: }
112:
113:
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