[iptables PATCH 4/6] libxtables: Introduce struct xt_option_entry::base

[Phil Sutter <phil@nwl.cc>]

Enable guided option parser users to parse integer values with a fixed
base.

Signed-off-by: Phil Sutter <phil@nwl.cc>
---
 include/xtables.h      | 3 ++-
 libxtables/xtoptions.c | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/xtables.h b/include/xtables.h
index 1a9e08bb131ab..b3c45c981b1c7 100644
--- a/include/xtables.h
+++ b/include/xtables.h
@@ -122,6 +122,7 @@ enum xt_option_flags {
  * @size:	size of the item pointed to by @ptroff; this is a safeguard
  * @min:	lowest allowed value (for singular integral types)
  * @max:	highest allowed value (for singular integral types)
+ * @base:	assumed base of parsed value for integer types (default 0)
  */
 struct xt_option_entry {
 	const char *name;
@@ -129,7 +130,7 @@ struct xt_option_entry {
 	unsigned int id, excl, also, flags;
 	unsigned int ptroff;
 	size_t size;
-	unsigned int min, max;
+	unsigned int min, max, base;
 };
 
 /**
diff --git a/libxtables/xtoptions.c b/libxtables/xtoptions.c
index 25540f8b88c6d..4fd0e70e6b555 100644
--- a/libxtables/xtoptions.c
+++ b/libxtables/xtoptions.c
@@ -161,7 +161,8 @@ static void xtopt_parse_int(struct xt_option_call *cb)
 	if (cb->entry->max != 0)
 		lmax = cb->entry->max;
 
-	if (!xtables_strtoul(cb->arg, NULL, &value, lmin, lmax))
+	if (!xtables_strtoul_base(cb->arg, NULL, &value,
+				  lmin, lmax, cb->entry->base))
 		xt_params->exit_err(PARAMETER_PROBLEM,
 			"%s: bad value for option \"--%s\", "
 			"or out of range (%ju-%ju).\n",
-- 
2.41.0