Signed-off-by: Jan Engelhardt <jengelh@xxxxxxxxxx>
---
include/xtables.h.in | 5 +++++
xtoptions.c | 29 +++++++++++++++++++++++++++++
2 files changed, 34 insertions(+), 0 deletions(-)
diff --git a/include/xtables.h.in b/include/xtables.h.in
index c3c8da9..2fa5977 100644
--- a/include/xtables.h.in
+++ b/include/xtables.h.in
@@ -50,6 +50,7 @@ struct in_addr;
* %XTTYPE_UINT*: standard integer
* %XTTYPE_UINT*RC: colon-separated range of standard integers
* %XTTYPE_STRING: arbitrary string
+ * %XTTYPE_MARKMASK32: 32-bit mark with optional mask
*/
enum xt_option_type {
XTTYPE_NONE,
@@ -57,6 +58,7 @@ enum xt_option_type {
XTTYPE_UINT32,
XTTYPE_UINT32RC,
XTTYPE_STRING,
+ XTTYPE_MARKMASK32,
};
/**
@@ -113,6 +115,9 @@ struct xt_option_call {
union {
uint8_t u8;
uint32_t u32, u32_range[2];
+ struct {
+ uint32_t mark, mask;
+ };
} val;
};
diff --git a/xtoptions.c b/xtoptions.c
index 631e7a3..e9bcaa8 100644
--- a/xtoptions.c
+++ b/xtoptions.c
@@ -186,11 +186,40 @@ static void xtopt_parse_string(struct xt_option_call *cb)
p[z] = '\0';
}
+/**
+ * Validate the input for being conformant to "mark[/mask]".
+ */
+static void xtopt_parse_markmask(struct xt_option_call *cb)
+{
+ unsigned int mark = 0, mask = ~0U;
+ char *end;
+
+ if (!xtables_strtoui(cb->arg, &end, &mark, 0, UINT32_MAX))
+ xt_params->exit_err(PARAMETER_PROBLEM,
+ "%s: bad mark value for option \"--%s\", "
+ "or out of range.\n",
+ cb->ext_name, cb->entry->name);
+ if (*end == '/' &&
+ !xtables_strtoui(end + 1, &end, &mask, 0, UINT32_MAX))
+ xt_params->exit_err(PARAMETER_PROBLEM,
+ "%s: bad mask value for option \"--%s\", "
+ "or out of range.\n",
+ cb->ext_name, cb->entry->name);
+ if (*end != '\0')
+ xt_params->exit_err(PARAMETER_PROBLEM,
+ "%s: trailing garbage after value "
+ "for option \"--%s\".\n",
+ cb->ext_name, cb->entry->name);
+ cb->val.mark = mark;
+ cb->val.mask = mask;
+}
+
static void (*const xtopt_subparse[])(struct xt_option_call *) = {
[XTTYPE_UINT8] = xtopt_parse_int,
[XTTYPE_UINT32] = xtopt_parse_int,
[XTTYPE_UINT32RC] = xtopt_parse_mint,
[XTTYPE_STRING] = xtopt_parse_string,
+ [XTTYPE_MARKMASK32] = xtopt_parse_markmask,
};
static const size_t xtopt_psize[] = {
--
1.7.1
--
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