This checks if offload is an available extended feature and compatible with the desired BSS. It is also conditional on the [General].PreferOffload setting which, for now, is being added as a 'hidden' developer feature (not documented). --- src/wiphy.c | 33 +++++++++++++++++++++++++++++++++ src/wiphy.h | 1 + 2 files changed, 34 insertions(+) diff --git a/src/wiphy.c b/src/wiphy.c index 3adc5669..2493e8eb 100644 --- a/src/wiphy.c +++ b/src/wiphy.c @@ -412,6 +412,39 @@ bool wiphy_can_randomize_mac_addr(struct wiphy *wiphy) return wiphy_has_feature(wiphy, NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR); } +bool wiphy_can_offload(struct wiphy *wiphy, struct scan_bss *bss) +{ + struct ie_rsn_info rsn_info; + int r; + bool prefer_offload = false; + + if (!wiphy_has_ext_feature(wiphy, + NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_PSK)) + return false; + + if (!l_settings_get_bool(iwd_get_config(), "General", "PreferOffload", + &prefer_offload) || !prefer_offload) + return false; + + memset(&rsn_info, 0, sizeof(rsn_info)); + r = scan_bss_get_rsn_info(bss, &rsn_info); + + if (r < 0) + return false; + + /* + * For now offload is only allowed on PSK networks. + */ + switch (rsn_info.akm_suites) { + case IE_RSN_AKM_SUITE_PSK: + case IE_RSN_AKM_SUITE_PSK_SHA256: + return true; + default: + return false; + } +} + + bool wiphy_rrm_capable(struct wiphy *wiphy) { if (wiphy_has_feature(wiphy, diff --git a/src/wiphy.h b/src/wiphy.h index 50c8c936..016e5879 100644 --- a/src/wiphy.h +++ b/src/wiphy.h @@ -80,6 +80,7 @@ const struct scan_freq_set *wiphy_get_supported_freqs( const struct wiphy *wiphy); bool wiphy_can_connect(struct wiphy *wiphy, struct scan_bss *bss); bool wiphy_can_randomize_mac_addr(struct wiphy *wiphy); +bool wiphy_can_offload(struct wiphy *wiphy, struct scan_bss *bss); bool wiphy_rrm_capable(struct wiphy *wiphy); bool wiphy_has_feature(struct wiphy *wiphy, uint32_t feature); bool wiphy_has_ext_feature(struct wiphy *wiphy, uint32_t feature); -- 2.26.2