/usr/src/nat-rtsp-0.7+1.g2ea3cb6/netfilter_helpers.h is in nat-rtsp-dkms 0.7+1.g2ea3cb6-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 | /*
* Helpers for netfiler modules. This file provides implementations for basic
* functions such as strncasecmp(), etc.
*
* gcc will warn for defined but unused functions, so we only include the
* functions requested. The following macros are used:
* NF_NEED_STRNCASECMP nf_strncasecmp()
* NF_NEED_STRTOU16 nf_strtou16()
* NF_NEED_STRTOU32 nf_strtou32()
*/
#ifndef _NETFILTER_HELPERS_H
#define _NETFILTER_HELPERS_H
/* Only include these functions for kernel code. */
#ifdef __KERNEL__
#include <linux/ctype.h>
#define iseol(c) ( (c) == '\r' || (c) == '\n' )
/*
* The standard strncasecmp()
*/
#ifdef NF_NEED_STRNCASECMP
static int
nf_strncasecmp(const char* s1, const char* s2, u_int32_t len)
{
if (s1 == NULL || s2 == NULL)
{
if (s1 == NULL && s2 == NULL)
{
return 0;
}
return (s1 == NULL) ? -1 : 1;
}
while (len > 0 && tolower(*s1) == tolower(*s2))
{
len--;
s1++;
s2++;
}
return ( (len == 0) ? 0 : (tolower(*s1) - tolower(*s2)) );
}
#endif /* NF_NEED_STRNCASECMP */
/*
* Parse a string containing a 16-bit unsigned integer.
* Returns the number of chars used, or zero if no number is found.
*/
#ifdef NF_NEED_STRTOU16
static int
nf_strtou16(const char* pbuf, u_int16_t* pval)
{
int n = 0;
*pval = 0;
while (isdigit(pbuf[n]))
{
*pval = (*pval * 10) + (pbuf[n] - '0');
n++;
}
return n;
}
#endif /* NF_NEED_STRTOU16 */
/*
* Parse a string containing a 32-bit unsigned integer.
* Returns the number of chars used, or zero if no number is found.
*/
#ifdef NF_NEED_STRTOU32
static int
nf_strtou32(const char* pbuf, u_int32_t* pval)
{
int n = 0;
*pval = 0;
while (pbuf[n] >= '0' && pbuf[n] <= '9')
{
*pval = (*pval * 10) + (pbuf[n] - '0');
n++;
}
return n;
}
#endif /* NF_NEED_STRTOU32 */
/*
* Given a buffer and length, advance to the next line and mark the current
* line.
*/
#ifdef NF_NEED_NEXTLINE
static int
nf_nextline(char* p, uint len, uint* poff, uint* plineoff, uint* plinelen)
{
uint off = *poff;
uint physlen = 0;
if (off >= len)
{
return 0;
}
while (p[off] != '\n')
{
if (len-off <= 1)
{
return 0;
}
physlen++;
off++;
}
/* if we saw a crlf, physlen needs adjusted */
if (physlen > 0 && p[off] == '\n' && p[off-1] == '\r')
{
physlen--;
}
/* advance past the newline */
off++;
*plineoff = *poff;
*plinelen = physlen;
*poff = off;
return 1;
}
#endif /* NF_NEED_NEXTLINE */
#endif /* __KERNEL__ */
#endif /* _NETFILTER_HELPERS_H */
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