The knowledge about HT and VHT modes could be useful for user experience.
So grab it via nl80211 and make it available in both C and LUA APIs,
and show htmodelist on CLI scan results.
---
include/iwinfo.h | 1 +
iwinfo_cli.c | 13 ++++++--
iwinfo_lua.c | 16 +++++++++-
iwinfo_nl80211.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 104 insertions(+), 3 deletions(-)
diff --git a/include/iwinfo.h b/include/iwinfo.h
index 929f697..c3c25ff 100644
--- a/include/iwinfo.h
+++ b/include/iwinfo.h
@@ -154,6 +154,7 @@ struct iwinfo_scanlist_entry {
uint8_t signal;
uint8_t quality;
uint8_t quality_max;
+ int htmodelist;
struct iwinfo_crypto_entry crypto;
};
diff --git a/iwinfo_cli.c b/iwinfo_cli.c
index 49c9035..2d58020 100644
--- a/iwinfo_cli.c
+++ b/iwinfo_cli.c
@@ -572,7 +572,7 @@ static void print_info(const struct iwinfo_ops *iw, const
char *ifname)
static void print_scanlist(const struct iwinfo_ops *iw, const char *ifname)
{
- int i, x, len;
+ int i, h, x, len;
char buf[IWINFO_BUFSIZE];
struct iwinfo_scanlist_entry *e;
@@ -603,8 +603,17 @@ static void print_scanlist(const struct iwinfo_ops *iw,
const char *ifname)
format_signal(e->signal - 0x100),
format_quality(e->quality),
format_quality_max(e->quality_max));
- printf(" Encryption: %s\n\n",
+ printf(" Encryption: %s\n",
format_encryption(&e->crypto));
+ if (e->htmodelist)
+ {
+ printf(" HT Capabilities: ");
+ for (h = 0; h < ARRAY_SIZE(IWINFO_HTMODE_NAMES); h++)
+ if (e->htmodelist & (1 << h))
+ printf("%s ", IWINFO_HTMODE_NAMES[h]);
+ printf ("\n");
+ }
+ printf ("\n");
}
}
diff --git a/iwinfo_lua.c b/iwinfo_lua.c
index eebab8e..01581a3 100644
--- a/iwinfo_lua.c
+++ b/iwinfo_lua.c
@@ -378,7 +378,7 @@ static int iwinfo_L_txpwrlist(lua_State *L, int
(*func)(const char *, char *, in
/* Wrapper for scan list */
static int iwinfo_L_scanlist(lua_State *L, int (*func)(const char *, char *,
int *))
{
- int i, x, len = 0;
+ int i, x, h, len = 0;
char rv[IWINFO_BUFSIZE];
char macstr[18];
const char *ifname = luaL_checkstring(L, 1);
@@ -432,6 +432,20 @@ static int iwinfo_L_scanlist(lua_State *L, int
(*func)(const char *, char *, int
iwinfo_L_cryptotable(L, &e->crypto);
lua_setfield(L, -2, "encryption");
+ /* HT Modes */
+ if (e->htmodelist)
+ {
+ lua_newtable(L);
+ for (h = 0; h <
ARRAY_SIZE(IWINFO_HTMODE_NAMES); h++)
+ {
+ lua_pushboolean(L, e->htmodelist & (1
<< h));
+ lua_setfield(L, -2,
IWINFO_HTMODE_NAMES[h]);
+ }
+ }
+ else
+ lua_pushnil(L);
+ lua_setfield(L, -2, "htmodelist");
+
lua_rawseti(L, -2, x);
}
}
diff --git a/iwinfo_nl80211.c b/iwinfo_nl80211.c
index ecd2d6a..542ac7d 100644
--- a/iwinfo_nl80211.c
+++ b/iwinfo_nl80211.c
@@ -1980,6 +1980,71 @@ struct nl80211_scanlist {
int len;
};
+static void nl80211_parse_ht_capa(struct iwinfo_scanlist_entry *e,
+ unsigned char
*ie,
+ int len)
+{
+ int capa;
+ if (len < 2)
+ return;
+ e->htmodelist |= IWINFO_HTMODE_HT20;
+ capa = ie[0] | (ie[8] << 8);
+ if (capa & (1 << 1))
+ {
+ e->htmodelist |= IWINFO_HTMODE_HT40;
+ if (e->htmodelist & IWINFO_HTMODE_VHT20)
+ e->htmodelist |= IWINFO_HTMODE_VHT40;
+ }
+}
+static void nl80211_parse_vht_capa(struct iwinfo_scanlist_entry *e,
+ unsigned
char *ie,
+ int len)
+{
+ int capa;
+ if (len < 4)
+ return;
+ capa = ie[0] | (ie[1] << 8) | (ie[2] << 16) | (ie[3] << 24);
+
+ e->htmodelist |= IWINFO_HTMODE_VHT20;
+ if (e->htmodelist & IWINFO_HTMODE_HT40)
+ e->htmodelist |= IWINFO_HTMODE_VHT40;
+
+ switch ((capa >> 2) & 3) {
+ /*case 0: neither 160 nor 80+80 */
+ case 1:
+ e->htmodelist |= IWINFO_HTMODE_VHT160;
+ break;
+ case 2:
+ e->htmodelist |= IWINFO_HTMODE_VHT80_80;
+ break;
+ }
+}
+static void nl80211_parse_vht_oper(struct iwinfo_scanlist_entry *e,
+ unsigned
char *ie,
+ int len)
+{
+ int chanwidth;
+ if (len < 1)
+ return;
+ chanwidth = ie[0];
+
+ e->htmodelist |= IWINFO_HTMODE_VHT20;
+ if (e->htmodelist & IWINFO_HTMODE_HT40)
+ e->htmodelist |= IWINFO_HTMODE_VHT40;
+
+ switch (chanwidth) {
+ /*case 0: 20 or 40 MHz */
+ case 1:
+ e->htmodelist |= IWINFO_HTMODE_VHT80;
+ break;
+ case 2:
+ e->htmodelist |= IWINFO_HTMODE_VHT160;
+ break;
+ case 3:
+ e->htmodelist |= IWINFO_HTMODE_VHT80_80;
+ break;
+ }
+}
static void nl80211_get_scanlist_ie(struct nlattr **bss,
struct iwinfo_scanlist_entry *e)
@@ -1999,11 +2064,23 @@ static void nl80211_get_scanlist_ie(struct nlattr **bss,
e->ssid[len] = 0;
break;
+ case 45: /* HT Capabilities */
+ nl80211_parse_ht_capa(e, ie + 2, ie[1]);
+ break;
+
case 48: /* RSN */
iwinfo_parse_rsn(&e->crypto, ie + 2, ie[1],
IWINFO_CIPHER_CCMP,
IWINFO_KMGMT_8021x);
break;
+ case 191: /* VHT Capabilities */
+ nl80211_parse_vht_capa(e, ie + 2, ie[1]);
+ break;
+
+ case 192: /* VHT Operation */
+ nl80211_parse_vht_oper(e, ie + 2, ie[1]);
+ break;
+
case 221: /* Vendor */
if (ie[1] >= 4 && !memcmp(ie + 2, ms_oui, 3) && ie[5]
== 1)
iwinfo_parse_rsn(&e->crypto, ie + 6, ie[1] - 4,
--
2.17.1
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