GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.sbin/mopd/moptrace/../common/get.c Lines: 0 36 0.0 %
Date: 2017-11-13 Branches: 0 12 0.0 %

Line Branch Exec Source
1
/*	$OpenBSD: get.c,v 1.8 2009/10/27 23:59:52 deraadt Exp $ */
2
3
/*
4
 * Copyright (c) 1993-2006 Mats O Jansson.  All rights reserved.
5
 *
6
 * Redistribution and use in source and binary forms, with or without
7
 * modification, are permitted provided that the following conditions
8
 * are met:
9
 * 1. Redistributions of source code must retain the above copyright
10
 *    notice, this list of conditions and the following disclaimer.
11
 * 2. Redistributions in binary form must reproduce the above copyright
12
 *    notice, this list of conditions and the following disclaimer in the
13
 *    documentation and/or other materials provided with the distribution.
14
 *
15
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25
 */
26
27
#include <sys/types.h>
28
#include "common/mopdef.h"
29
30
u_char
31
mopGetChar(u_char *pkt, int *idx)
32
{
33
	u_char ret;
34
35
	ret = pkt[*idx];
36
	*idx = *idx + 1;
37
	return (ret);
38
}
39
40
u_short
41
mopGetShort(u_char *pkt, int *idx)
42
{
43
	u_short ret;
44
45
	ret = pkt[*idx] + pkt[*idx+1]*256;
46
	*idx = *idx + 2;
47
	return (ret);
48
}
49
50
u_short
51
mopGetNShort(u_char *pkt, int *idx)
52
{
53
	u_short ret;
54
55
	ret = pkt[*idx]*256 + pkt[*idx+1];
56
	*idx = *idx + 2;
57
	return (ret);
58
}
59
60
u_long
61
mopGetLong(u_char *pkt, int *idx)
62
{
63
	u_long ret;
64
65
	ret = pkt[*idx] + pkt[*idx+1]*0x100 + pkt[*idx+2]*0x10000 +
66
	    pkt[*idx+3]*0x1000000;
67
	*idx = *idx + 4;
68
	return (ret);
69
}
70
71
void
72
mopGetMulti(u_char *pkt, int *idx, u_char *dest, int size)
73
{
74
	int i;
75
76
	for (i = 0; i < size; i++)
77
		dest[i] = pkt[*idx+i];
78
	*idx = *idx + size;
79
}
80
81
int
82
mopGetTrans(u_char *pkt, int trans)
83
{
84
	u_short	ptype;
85
86
	if (trans == 0) {
87
		ptype = pkt[12]*256 + pkt[13];
88
		if (ptype < 1600)
89
			trans = TRANS_8023;
90
		else
91
			trans = TRANS_ETHER;
92
	}
93
	return (trans);
94
}
95
96
void
97
mopGetHeader(u_char *pkt, int *idx, u_char **dst, u_char **src,
98
    u_short *proto, int *len, int trans)
99
{
100
	*dst = pkt;
101
	*src = pkt + 6;
102
	*idx = *idx + 12;
103
104
	switch (trans) {
105
	case TRANS_ETHER:
106
		*proto = mopGetNShort(pkt, idx);
107
		*len   = (int)mopGetShort(pkt, idx);
108
		break;
109
	case TRANS_8023:
110
		*len   = (int)mopGetNShort(pkt, idx);
111
		*idx   = *idx + 6;
112
		*proto = mopGetNShort(pkt, idx);
113
		break;
114
	}
115
}
116
117
u_short
118
mopGetLength(u_char *pkt, int trans)
119
{
120
	switch (trans) {
121
	case TRANS_ETHER:
122
		return (pkt[14] + pkt[15]*256);
123
	case TRANS_8023:
124
		return (pkt[12]*256 + pkt[13]);
125
	}
126
	return (0);
127
}