From 55c1fdf0d6c57e02c2279e0ba0c6f8ec502b46df Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 6 Feb 2019 13:17:19 +0200 Subject: cfg80211: allow sending vendor events unicast Sometimes, we may want to transport higher bandwidth data through vendor events, and in that case sending it multicast is a bad idea. Allow vendor events to be unicast. Signed-off-by: Johannes Berg --- net/wireless/nl80211.c | 30 ++++++++++++++++++++++++------ 1 file changed, 24 insertions(+), 6 deletions(-) (limited to 'net/wireless') diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index d5badbbb28a3..c5df5211d29a 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -4,7 +4,7 @@ * Copyright 2006-2010 Johannes Berg * Copyright 2013-2014 Intel Mobile Communications GmbH * Copyright 2015-2017 Intel Deutschland GmbH - * Copyright (C) 2018 Intel Corporation + * Copyright (C) 2018-2019 Intel Corporation */ #include @@ -9306,6 +9306,7 @@ struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy, struct wireless_dev *wdev, enum nl80211_commands cmd, enum nl80211_attrs attr, + unsigned int portid, int vendor_event_idx, int approxlen, gfp_t gfp) { @@ -9329,7 +9330,7 @@ struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy, return NULL; } - return __cfg80211_alloc_vendor_skb(rdev, wdev, approxlen, 0, 0, + return __cfg80211_alloc_vendor_skb(rdev, wdev, approxlen, portid, 0, cmd, attr, info, gfp); } EXPORT_SYMBOL(__cfg80211_alloc_event_skb); @@ -9338,6 +9339,7 @@ void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp) { struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0]; void *hdr = ((void **)skb->cb)[1]; + struct nlmsghdr *nlhdr = nlmsg_hdr(skb); struct nlattr *data = ((void **)skb->cb)[2]; enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE; @@ -9347,11 +9349,16 @@ void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp) nla_nest_end(skb, data); genlmsg_end(skb, hdr); - if (data->nla_type == NL80211_ATTR_VENDOR_DATA) - mcgrp = NL80211_MCGRP_VENDOR; + if (nlhdr->nlmsg_pid) { + genlmsg_unicast(wiphy_net(&rdev->wiphy), skb, + nlhdr->nlmsg_pid); + } else { + if (data->nla_type == NL80211_ATTR_VENDOR_DATA) + mcgrp = NL80211_MCGRP_VENDOR; - genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0, - mcgrp, gfp); + genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), + skb, 0, mcgrp, gfp); + } } EXPORT_SYMBOL(__cfg80211_send_event_skb); @@ -12736,6 +12743,17 @@ int cfg80211_vendor_cmd_reply(struct sk_buff *skb) } EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply); +unsigned int cfg80211_vendor_cmd_get_sender(struct wiphy *wiphy) +{ + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); + + if (WARN_ON(!rdev->cur_cmd_info)) + return 0; + + return rdev->cur_cmd_info->snd_portid; +} +EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_get_sender); + static int nl80211_set_qos_map(struct sk_buff *skb, struct genl_info *info) { -- cgit v1.2.3-59-g8ed1b