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ipt_NETFLOW: add compatibility with 6.8+ #230

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ipt_NETFLOW: add compatibility with 6.8+ #230

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56 changes: 18 additions & 38 deletions compat.h
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Original file line number Diff line number Diff line change
Expand Up @@ -216,7 +216,7 @@ struct timeval {
long tv_usec; /* microseconds */
};

unsigned long timeval_to_jiffies(const struct timeval *tv)
static inline unsigned long timeval_to_jiffies(const struct timeval *tv)
{
return timespec64_to_jiffies(&(struct timespec64){
tv->tv_sec,
Expand All @@ -225,6 +225,20 @@ unsigned long timeval_to_jiffies(const struct timeval *tv)
}
#endif

#ifndef HAVE_STRLCPY
static inline size_t strlcpy(char *dest, const char *src, size_t size)
{
size_t ret = strlen(src);

if (size) {
size_t len = (ret >= size) ? size - 1 : ret;
__builtin_memcpy(dest, src, len);
dest[len] = '\0';
}
return ret;
}
#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
# ifdef ktime_to_timeval
/* ktime_to_timeval is defined on 64bit and inline on 32bit cpu */
Expand Down Expand Up @@ -380,10 +394,10 @@ static int sockaddr_cmp(const struct sockaddr_storage *sa1, const struct sockadd
return 0;
}

#ifndef IN6PTON_XDIGIT
#ifndef HAVE_IN6_PTON
#define hex_to_bin compat_hex_to_bin
/* lib/hexdump.c */
int hex_to_bin(char ch)
static inline int hex_to_bin(char ch)
{
if ((ch >= '0') && (ch <= '9'))
return ch - '0';
Expand Down Expand Up @@ -593,7 +607,7 @@ int in6_pton(const char *src, int srclen,
*end = s;
return ret;
}
#endif /* IN6PTON_XDIGIT */
#endif /* HAVE_IN6_PTON */

#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,2,0)
# define sock_create_kern(f, t, p, s) sock_create_kern(&init_net, f, t, p, s)
Expand Down Expand Up @@ -712,40 +726,6 @@ static inline void do_gettimeofday(struct timeval *tv)
}
#endif

#define TOLOWER(x) ((x) | 0x20)
unsigned long long strtoul(const char *cp, char **endp, unsigned int base)
{
unsigned long long result = 0;

if (!base) {
if (cp[0] == '0') {
if (TOLOWER(cp[1]) == 'x' && isxdigit(cp[2]))
base = 16;
else
base = 8;
} else {
base = 10;
}
}

if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x')
cp += 2;

while (isxdigit(*cp)) {
unsigned int value;

value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10;
if (value >= base)
break;
result = result * base + value;
cp++;
}
if (endp)
*endp = (char *)cp;

return result;
}

#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,12,0)
/*
* find_module() is unexported in v5.12:
Expand Down
4 changes: 4 additions & 0 deletions gen_compat_def
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Expand Up @@ -129,6 +129,10 @@ kbuild_test_ref totalram_pages linux/mm.h
kbuild_test_member nf_ct_event_notifier.ct_event net/netfilter/nf_conntrack_ecache.h
# 6.4: 0199849acd07 ("sysctl: remove register_sysctl_paths()")
kbuild_test_symbol register_sysctl_paths linux/sysctl.h
# 6.8: d26270061ae6 ("string: Remove strlcpy()")
kbuild_test_symbol strlcpy linux/string.h
# 2.6.18 lacks in6_pton and in4_pton
kbuild_test_symbol in6_pton linux/inet.h

echo "// End of compat_def.h"

Expand Down
7 changes: 5 additions & 2 deletions ipt_NETFLOW.c
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,9 @@
#include <linux/in6.h>
#include <linux/inet.h>
#include <linux/kernel.h>
#if LINUX_VERSION_CODE > KERNEL_VERSION(5,10,0)
#include <linux/kstrtox.h>
#endif
#include <linux/ip.h>
#include <linux/udp.h>
#include <linux/icmp.h>
Expand Down Expand Up @@ -2396,7 +2399,7 @@ static int add_destinations(const char *ptr)
++end;
if (succ &&
(*end == ':' || *end == '.' || *end == 'p' || *end == '#'))
sin6->sin6_port = htons(strtoul(++end, (char **)&end, 0));
sin6->sin6_port = htons(simple_strtoul(++end, (char **)&end, 0));
if (succ && *end == '@') {
++end;
sout->sin6_family = AF_INET6;
Expand All @@ -2411,7 +2414,7 @@ static int add_destinations(const char *ptr)
sin->sin_port = htons(2055);
succ = in4_pton(ptr, len, (u8 *)&sin->sin_addr, -1, &end);
if (succ && *end == ':')
sin->sin_port = htons(strtoul(++end, (char **)&end, 0));
sin->sin_port = htons(simple_strtoul(++end, (char **)&end, 0));
if (succ && *end == '@') {
++end;
sout->sin_family = AF_INET;
Expand Down