[openwrt/openwrt] wifi-scripts: fix creation of IBSS in legacy (non-HT) mode

[LEDE Commits]

nbd pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/cee9fcdb7350911f474544189817d25fd4070111

commit cee9fcdb7350911f474544189817d25fd4070111
Author: Alexandru Gagniuc <mr.nuke.me at gmail.com>
AuthorDate: Wed Apr 3 14:32:08 2024 -0500

    wifi-scripts: fix creation of IBSS in legacy (non-HT) mode
    
    When an IBBS interface is configured for IBSS legacy mode, wdev.htmode
    is empty. This is empty string results in an empty positional argument
    to the "ibbs join" command, for example:
    
        iw dev phy0-ibss0 ibss join crymesh 2412 '' fixed-freq beacon-interval 100
    
    This empty argument is interpreted as an invalid HT mode by 'iw',
    causing the entire command to fail and print a "usage" message:
    
        daemon.notice netifd: radio0 (4527): Usage:    iw [options] \
            dev <devname> ibss join <SSID> <freq in MHz> ...
    
    Although nobody will ever need more than 640K of IBSS, explicitly use
    "NOHT" if an HT mode is not given. This fixes the problem.
    
    Fixes: e56c5f7b276a ("hostapd: add ucode support, use ucode for the main ubus object")
    Signed-off-by: Alexandru Gagniuc <mr.nuke.me at gmail.com>
    Signed-off-by: Felix Fietkau <nbd at nbd.name> [extend to cover more cases]
---
 package/network/config/wifi-scripts/files/usr/share/hostap/wdev.uc | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/package/network/config/wifi-scripts/files/usr/share/hostap/wdev.uc b/package/network/config/wifi-scripts/files/usr/share/hostap/wdev.uc
index ff4d629fd6..d505e3035f 100644
--- a/package/network/config/wifi-scripts/files/usr/share/hostap/wdev.uc
+++ b/package/network/config/wifi-scripts/files/usr/share/hostap/wdev.uc
@@ -32,10 +32,11 @@ function iface_start(wdev)
 		wdev_config.macaddr = phydev.macaddr_next();
 	wdev_create(phy, ifname, wdev_config);
 	wdev_set_up(ifname, true);
+	let htmode = wdev.htmode || "NOHT";
 	if (wdev.freq)
-		system(`iw dev ${ifname} set freq ${wdev.freq} ${wdev.htmode}`);
+		system(`iw dev ${ifname} set freq ${wdev.freq} ${htmode}`);
 	if (wdev.mode == "adhoc") {
-		let cmd = ["iw", "dev", ifname, "ibss", "join", wdev.ssid, wdev.freq, wdev.htmode, "fixed-freq" ];
+		let cmd = ["iw", "dev", ifname, "ibss", "join", wdev.ssid, wdev.freq, htmode, "fixed-freq" ];
 		if (wdev.bssid)
 			push(cmd, wdev.bssid);
 		for (let key in [ "beacon-interval", "basic-rates", "mcast-rate", "keys" ])
@@ -43,7 +44,7 @@ function iface_start(wdev)
 				push(cmd, key, wdev[key]);
 		system(cmd);
 	} else if (wdev.mode == "mesh") {
-		let cmd = [ "iw", "dev", ifname, "mesh", "join", wdev.ssid, "freq", wdev.freq, wdev.htmode ];
+		let cmd = [ "iw", "dev", ifname, "mesh", "join", wdev.ssid, "freq", wdev.freq, htmode ];
 		for (let key in [ "mcast-rate", "beacon-interval" ])
 			if (wdev[key])
 				push(cmd, key, wdev[key]);