struct ieee80211_iface_combination — possible interface combination
struct ieee80211_iface_combination {
const struct ieee80211_iface_limit * limits;
u32 num_different_channels;
u16 max_interfaces;
u8 n_limits;
bool beacon_int_infra_match;
u8 radar_detect_widths;
u8 radar_detect_regions;
}; limits for the given interface types
can use up to this many different channels
maximum number of interfaces in total allowed in this group
number of limitations
In this combination, the beacon intervals between infrastructure and AP types must match. This is required only in special cases.
bitmap of channel widths supported for radar detection
bitmap of regions supported for radar detection
With this structure the driver can describe which interface combinations it supports concurrently.
1. Allow #STA <= 1, #AP <= 1, matching BI, channels = 1, 2 total:
struct ieee80211_iface_limit limits1[] = {
{ .max = 1, .types = BIT(NL80211_IFTYPE_STATION), },
{ .max = 1, .types = BIT(NL80211_IFTYPE_AP}, },
};
struct ieee80211_iface_combination combination1 = {
.limits = limits1,
.n_limits = ARRAY_SIZE(limits1),
.max_interfaces = 2,
.beacon_int_infra_match = true,
};
2. Allow #{AP, P2P-GO} <= 8, channels = 1, 8 total:
struct ieee80211_iface_limit limits2[] = {
{ .max = 8, .types = BIT(NL80211_IFTYPE_AP) |
BIT(NL80211_IFTYPE_P2P_GO), },
};
struct ieee80211_iface_combination combination2 = {
.limits = limits2,
.n_limits = ARRAY_SIZE(limits2),
.max_interfaces = 8,
.num_different_channels = 1,
};
3. Allow #STA <= 1, #{P2P-client,P2P-GO} <= 3 on two channels, 4 total.
This allows for an infrastructure connection and three P2P connections.
struct ieee80211_iface_limit limits3[] = {
{ .max = 1, .types = BIT(NL80211_IFTYPE_STATION), },
{ .max = 3, .types = BIT(NL80211_IFTYPE_P2P_GO) |
BIT(NL80211_IFTYPE_P2P_CLIENT), },
};
struct ieee80211_iface_combination combination3 = {
.limits = limits3,
.n_limits = ARRAY_SIZE(limits3),
.max_interfaces = 4,
.num_different_channels = 2,
};