STRUCT IEEE80211_IFA(9)                Device registration                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 AT sipsolutions.net>
           Author.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   STRUCT IEEE80211_IFA(9)