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DNETMAP version 2

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- new type: static binding
- new persistent flag option for prefix
- add extra information in /proc/net/xt_DNETMAP/prefix_stat that
  includes the count of static bindings and persistent flag
- add proc interface write support (add/del/flush binding)
- updated manual
This commit is contained in:
Marek Kierdelewicz
2012-06-10 12:35:56 +02:00
committed by Jan Engelhardt
parent 1e8da7c31c
commit 492236f931
4 changed files with 446 additions and 81 deletions
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47
extensions/libxt_DNETMAP.c
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@@ -20,6 +20,8 @@ static const struct option DNETMAP_opts[] = {
{"prefix", 1, NULL, 'p'},
{"reuse", 0, NULL, 'r'},
{"ttl", 1, NULL, 't'},
{"static", 0, NULL, 's'},
{"persistent", 0, NULL, 'e'},
{.name = NULL}
};
@@ -33,9 +35,14 @@ static void DNETMAP_help(void)
" --%s seconds\n"
" Regenerate bindings ttl value to seconds. If negative value is specified,\n"
" bindings ttl is kept unchanged. If not specified then default ttl value (600s)\n"
" is used.\n\n",
DNETMAP_opts[0].name, DNETMAP_opts[1].name,
DNETMAP_opts[2].name);
" is used\n"
" --%s\n"
" Match only static entries for this rule. Dynamic entries won't be created.\n"
" --%s\n"
" Set prefix persistent. It won't be removed after deleting last iptables rule.\n\n",
DNETMAP_opts[0].name, DNETMAP_opts[1].name,
DNETMAP_opts[2].name, DNETMAP_opts[3].name,
DNETMAP_opts[4].name);
}
static u_int32_t bits2netmask(int bits)
@@ -151,6 +158,20 @@ static int DNETMAP_parse(int c, char **argv, int invert, unsigned int *flags,
*flags |= XT_DNETMAP_REUSE;
tginfo->flags |= XT_DNETMAP_REUSE;
return 1;
case 's':
xtables_param_act(XTF_ONLY_ONCE, MODULENAME, "--static",
*flags & XT_DNETMAP_STATIC);
xtables_param_act(XTF_NO_INVERT, MODULENAME, "--static", invert);
*flags |= XT_DNETMAP_STATIC;
tginfo->flags |= XT_DNETMAP_STATIC;
return 1;
case 'e':
xtables_param_act(XTF_ONLY_ONCE, MODULENAME, "--persistent",
*flags & XT_DNETMAP_PERSISTENT);
xtables_param_act(XTF_NO_INVERT, MODULENAME, "--persistent", invert);
*flags |= XT_DNETMAP_PERSISTENT;
tginfo->flags |= XT_DNETMAP_PERSISTENT;
return 1;
case 't':
xtables_param_act(XTF_ONLY_ONCE, MODULENAME, "--ttl",
*flags & XT_DNETMAP_TTL);
@@ -198,7 +219,15 @@ static void DNETMAP_print(const void *ip, const struct xt_entry_target *target,
else
printf("any");
printf(" reuse %i", (*flags & XT_DNETMAP_REUSE) > 0);
if (*flags & XT_DNETMAP_REUSE)
printf(" reuse");
if (*flags & XT_DNETMAP_STATIC)
printf(" static");
if (*flags & XT_DNETMAP_PERSISTENT)
printf(" persistent");
if (*flags & XT_DNETMAP_TTL)
printf(" ttl %i", tginfo->ttl);
else
@@ -214,7 +243,15 @@ static void DNETMAP_save(const void *ip, const struct xt_entry_target *target)
printf(" --%s ", DNETMAP_opts[0].name);
DNETMAP_print_addr(ip, target, 0);
}
printf(" --reuse %i ", *flags & XT_DNETMAP_REUSE);
if (*flags & XT_DNETMAP_REUSE)
printf(" --reuse ");
if (*flags & XT_DNETMAP_STATIC)
printf(" --static ");
if (*flags & XT_DNETMAP_PERSISTENT)
printf(" --persistent ");
/* ommited because default value can change as kernel mod param */
if (*flags & XT_DNETMAP_TTL)