Annotation of embedaddon/libpdel/ppp/ppp_util.c, revision 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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