iw: scan: add extension tag parsing
HE IEs are part of the extension tag (ID 255).
Signed-off-by: Brian Norris <briannorris@chromium.org>
Link: https://lore.kernel.org/r/20201118033936.3667788-2-briannorris@chromium.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/scan.c b/scan.c
index 8c23483..58a0998 100644
--- a/scan.c
+++ b/scan.c
@@ -2272,6 +2272,36 @@
printf("\n");
}
+static const struct ie_print ext_printers[] = {
+};
+
+static void print_extension(unsigned char len, unsigned char *ie,
+ bool unknown, enum print_ie_type ptype)
+{
+ unsigned char tag;
+
+ if (len < 1) {
+ printf("\tExtension IE: <empty>\n");
+ return;
+ }
+
+ tag = ie[0];
+ if (tag < ARRAY_SIZE(ext_printers) && ext_printers[tag].name &&
+ ext_printers[tag].flags & BIT(ptype)) {
+ print_ie(&ext_printers[tag], tag, len - 1, ie + 1, NULL);
+ return;
+ }
+
+ if (unknown) {
+ int i;
+
+ printf("\tUnknown Extension ID (%d):", ie[0]);
+ for (i = 1; i < len; i++)
+ printf(" %.2x", ie[i]);
+ printf("\n");
+ }
+}
+
void print_ies(unsigned char *ie, int ielen, bool unknown,
enum print_ie_type ptype)
{
@@ -2290,6 +2320,8 @@
ie[0], ie[1], ie + 2, &ie_buffer);
} else if (ie[0] == 221 /* vendor */) {
print_vendor(ie[1], ie + 2, unknown, ptype);
+ } else if (ie[0] == 255 /* extension */) {
+ print_extension(ie[1], ie + 2, unknown, ptype);
} else if (unknown) {
int i;
