Return-path: Received: from mail-io0-f194.google.com ([209.85.223.194]:40855 "EHLO mail-io0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932231AbdL1R6i (ORCPT ); Thu, 28 Dec 2017 12:58:38 -0500 Received: by mail-io0-f194.google.com with SMTP id v30so7264931iov.7 for ; Thu, 28 Dec 2017 09:58:38 -0800 (PST) From: Denis Kenzior To: linux-wireless@vger.kernel.org Cc: Denis Kenzior Subject: [RFC 1/4] nl80211: Add CONTROL_PORT_OVER_NL80211 attribute Date: Thu, 28 Dec 2017 11:58:29 -0600 Message-Id: <20171228175832.3253-2-denkenz@gmail.com> (sfid-20171228_185853_802417_80C54F85) In-Reply-To: <20171228175832.3253-1-denkenz@gmail.com> References: <20171228175832.3253-1-denkenz@gmail.com> Sender: linux-wireless-owner@vger.kernel.org List-ID: Signed-off-by: Denis Kenzior --- include/net/cfg80211.h | 3 +++ include/uapi/linux/nl80211.h | 14 +++++++++++++- net/mac80211/cfg.c | 2 ++ net/mac80211/ieee80211_i.h | 1 + net/mac80211/mlme.c | 2 ++ net/wireless/nl80211.c | 10 ++++++++++ 6 files changed, 31 insertions(+), 1 deletion(-) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 3a4a1a903a4d..0aa1c866a73b 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -646,6 +646,8 @@ struct survey_info { * allowed through even on unauthorized ports * @control_port_no_encrypt: TRUE to prevent encryption of control port * protocol frames. + * @control_port_over_nl80211: TRUE if userspace expects to exchange control + * port frames over NL80211 instead of the network interface. * @wep_keys: static WEP keys, if not NULL points to an array of * CFG80211_MAX_WEP_KEYS WEP keys * @wep_tx_key: key index (0..3) of the default TX static WEP key @@ -661,6 +663,7 @@ struct cfg80211_crypto_settings { bool control_port; __be16 control_port_ethertype; bool control_port_no_encrypt; + bool control_port_over_nl80211; struct key_params *wep_keys; int wep_tx_key; const u8 *psk; diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h index c587a61c32bf..8855b7eaf92c 100644 --- a/include/uapi/linux/nl80211.h +++ b/include/uapi/linux/nl80211.h @@ -542,7 +542,8 @@ * IEs in %NL80211_ATTR_IE, %NL80211_ATTR_AUTH_TYPE, %NL80211_ATTR_USE_MFP, * %NL80211_ATTR_MAC, %NL80211_ATTR_WIPHY_FREQ, %NL80211_ATTR_CONTROL_PORT, * %NL80211_ATTR_CONTROL_PORT_ETHERTYPE, - * %NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT, %NL80211_ATTR_MAC_HINT, and + * %NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT, + * %NL80211_ATTR_CONTROL_PORT_OVER_NL80211, %NL80211_ATTR_MAC_HINT, and * %NL80211_ATTR_WIPHY_FREQ_HINT. * If included, %NL80211_ATTR_MAC and %NL80211_ATTR_WIPHY_FREQ are * restrictions on BSS selection, i.e., they effectively prevent roaming @@ -1445,6 +1446,15 @@ enum nl80211_commands { * @NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT: When included along with * %NL80211_ATTR_CONTROL_PORT_ETHERTYPE, indicates that the custom * ethertype frames used for key negotiation must not be encrypted. + * @NL80211_ATTR_CONTROL_PORT_OVER_NL80211: A flag indicating whether control + * port frames (e.g. of type given in %NL80211_ATTR_CONTROL_PORT_ETHERTYPE) + * will be sent directly to the network interface or sent via the NL80211 + * socket. If this attribute is missing, then legacy behavior of sending + * control port frames directly to the network interface is used. If the + * flag is included, then control port frames are sent over NL80211 instead + * using %CMD_CONTROL_PORT_FRAME. If control port routing over NL80211 is + * to be used then userspace must also use the %NL80211_ATTR_SOCKET_OWNER + * flag. * * @NL80211_ATTR_TESTDATA: Testmode data blob, passed through to the driver. * We recommend using nested, driver-specific attributes within this. @@ -2579,6 +2589,8 @@ enum nl80211_attrs { NL80211_ATTR_PMKR0_NAME, NL80211_ATTR_PORT_AUTHORIZED, + NL80211_ATTR_CONTROL_PORT_OVER_NL80211, + /* add attributes here, update the policy in nl80211.c */ __NL80211_ATTR_AFTER_LAST, diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index b77ee342b5f8..b6f37ae5e3be 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -925,6 +925,7 @@ static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev, */ sdata->control_port_protocol = params->crypto.control_port_ethertype; sdata->control_port_no_encrypt = params->crypto.control_port_no_encrypt; + sdata->control_port_over_nl80211 = false; sdata->encrypt_headroom = ieee80211_cs_headroom(sdata->local, ¶ms->crypto, sdata->vif.type); @@ -934,6 +935,7 @@ static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev, params->crypto.control_port_ethertype; vlan->control_port_no_encrypt = params->crypto.control_port_no_encrypt; + vlan->control_port_over_nl80211 = false; vlan->encrypt_headroom = ieee80211_cs_headroom(sdata->local, ¶ms->crypto, diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 26900025de2f..6f91aea6a4cb 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -899,6 +899,7 @@ struct ieee80211_sub_if_data { u16 sequence_number; __be16 control_port_protocol; bool control_port_no_encrypt; + bool control_port_over_nl80211; int encrypt_headroom; atomic_t num_tx_queued; diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 39b660b9a908..fc71a906939b 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -4830,6 +4830,8 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, sdata->control_port_protocol = req->crypto.control_port_ethertype; sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; + sdata->control_port_over_nl80211 = + req->crypto.control_port_over_nl80211; sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto, sdata->vif.type); diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index b3f8970c3a47..f5b4008f40da 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -286,6 +286,7 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = { [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG }, [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 }, [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG }, + [NL80211_ATTR_CONTROL_PORT_OVER_NL80211] = { .type = NLA_FLAG }, [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG }, [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 }, [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 }, @@ -8209,6 +8210,15 @@ static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev, } else settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE); + if (info->attrs[NL80211_ATTR_CONTROL_PORT_OVER_NL80211]) { + if (!info->attrs[NL80211_ATTR_SOCKET_OWNER]) + return -EINVAL; + + settings->control_port_over_nl80211 = true; + } else { + settings->control_port_over_nl80211 = false; + } + if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) { void *data; int len, i; -- 2.13.5