STRUCT IEEE80211_IFA(9)

NAME
struct_ieee80211_iface_combination - possible interface combination

SYNOPSIS

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;
};

MEMBERS

limits
    limits for the given interface types

num_different_channels
    can use up to this many different channels

max_interfaces
    maximum number of interfaces in total allowed in this group

n_limits
    number of limitations

beacon_int_infra_match
    In this combination, the beacon intervals between infrastructure and AP types must match. This is required only in special cases.

radar_detect_widths
    bitmap of channel widths supported for radar detection

radar_detect_regions
    bitmap of regions supported for radar detection

DESCRIPTION

With this structure the driver can describe which interface combinations it supports concurrently.

EXAMPLES

       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,
        };

AUTHOR

Johannes Berg <johannes@sipsolutions.net>
    Author.

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