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IPMARK: redo ipmark_tg_parse()

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- check for illegal inversion on flags
- use param_act() and strtonum() instead of open-coded checks
This commit is contained in:
Jan Engelhardt
2008-04-09 14:39:44 +02:00
parent 03eeabb4bd
commit 1060138f77
1 changed files with 17 additions and 23 deletions
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40
extensions/libxt_IPMARK.c
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@@ -52,40 +52,37 @@ static int ipmark_tg_parse(int c, char **argv, int invert, unsigned int *flags,
{
struct xt_ipmark_tginfo *info = (void *)(*target)->data;
unsigned int n;
char *end;
switch (c) {
case '1':
param_act(P_ONLY_ONCE, "IPMARK", "addr", *flags & FL_ADDR_USED);
param_act(P_NO_INVERT, "IPMARK", "addr", invert);
if (strcmp(optarg, "src") == 0)
info->selector = XT_IPMARK_SRC;
else if (strcmp(optarg, "dst") == 0)
info->selector = XT_IPMARK_DST;
else
exit_error(PARAMETER_PROBLEM, "Bad addr value `%s' - should be `src' or `dst'", optarg);
if (*flags & FL_ADDR_USED)
exit_error(PARAMETER_PROBLEM,
"IPMARK target: Can't specify --addr twice");
*flags |= FL_ADDR_USED;
break;
return true;
case '2':
info->andmask = strtoul(optarg, &end, 0);
if (*end != '\0' || end == optarg)
exit_error(PARAMETER_PROBLEM, "Bad and-mask value `%s'", optarg);
if (*flags & FL_AND_MASK_USED)
exit_error(PARAMETER_PROBLEM,
"IPMARK target: Can't specify --and-mask twice");
param_act(P_ONLY_ONCE, "IPMARK", "and-mask", *flags & FL_AND_MASK_USED);
param_act(P_NO_INVERT, "IPMARK", "and-mask", invert);
if (!strtonum(optarg, NULL, &n, 0, ~0U))
param_act(P_BAD_VALUE, "IPMARK", "and-mask", optarg);
info->andmask = n;
*flags |= FL_AND_MASK_USED;
break;
return true;
case '3':
info->ormask = strtoul(optarg, &end, 0);
if (*end != '\0' || end == optarg)
exit_error(PARAMETER_PROBLEM, "Bad or-mask value `%s'", optarg);
if (*flags & FL_OR_MASK_USED)
exit_error(PARAMETER_PROBLEM,
"IPMARK target: Can't specify --or-mask twice");
param_act(P_ONLY_ONCE, "IPMARK", "or-mask", *flags & FL_OR_MASK_USED);
param_act(P_NO_INVERT, "IPMARK", "or-mask", invert);
if (!strtonum(optarg, NULL, &n, 0, ~0U))
param_act(P_BAD_VALUE, "IPMARK", "or-mask", optarg);
info->ormask = n;
*flags |= FL_OR_MASK_USED;
break;
return true;
case '4':
param_act(P_ONLY_ONCE, "IPMARK", "--shift", *flags & FL_SHIFT);
@@ -98,12 +95,9 @@ static int ipmark_tg_parse(int c, char **argv, int invert, unsigned int *flags,
param_act(P_BAD_VALUE, "IPMARK", "--shift", optarg);
info->shift = n;
return true;
default:
return 0;
}
return 1;
return false;
}
static void ipmark_tg_check(unsigned int flags)