[PATCH] mesh: Make mesh ttl configurable

[Jouni Malinen]

On Tue, Apr 21, 2026 at 11:53:36AM +0530, Thiyagarajan Pandiyan wrote:
> Allow mesh_ttl (dot11MeshTTL) to be configurable, pass that to the
> driver (only nl80211 implemented).

> diff --git a/src/drivers/driver_nl80211.c b/src/drivers/driver_nl80211.c
> @@ -12803,6 +12803,9 @@ static int nl80211_put_mesh_config(struct nl_msg *msg,
> +	    ((params->flags & WPA_DRIVER_MESH_CONF_FLAG_TTL) &&
> +	     nla_put_u32(msg, NL80211_MESHCONF_TTL,
> +			 params->mesh_ttl)) ||

While nl80211.h does not document this explicitly, the kernel
implementation in cfg80211 seems to use nla_get_u8() to fetch this
attribute. As such, nla_put_u32() here seems wrong and would likely
break functionality at least on big endian systems.

> diff --git a/wpa_supplicant/config.h b/wpa_supplicant/config.h
> @@ -19,6 +19,7 @@
> +#define DEFAULT_MESH_TTL 31

It would be good to explain where this default value comes from.

-- 
Jouni Malinen                                            PGP id EFC895FA