From 94f9065648a2645b28187b44ec7778c30cf58758 Mon Sep 17 00:00:00 2001 From: Chun-Yeow Yeoh Date: Sat, 21 Jan 2012 01:02:16 +0800 Subject: [PATCH] {nl,cfg,mac}80211: Add support of setting non-forwarding entity in Mesh A mesh node that joins the mesh network is by default a forwarding entity. This patch allows the mesh node to set as non-forwarding entity. Whenever dot11MeshForwarding is set to 0, the mesh node can prevent itself from forwarding the traffic which is not destined to him. Signed-off-by: Chun-Yeow Yeoh Signed-off-by: John W. Linville --- include/linux/nl80211.h | 4 ++++ include/net/cfg80211.h | 1 + net/mac80211/cfg.c | 2 ++ net/mac80211/debugfs_netdev.c | 1 + net/mac80211/mesh_hwmp.c | 2 +- net/wireless/mesh.c | 1 + net/wireless/nl80211.c | 5 +++++ 7 files changed, 15 insertions(+), 1 deletion(-) diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h index 0f5ff3739820..4f98fae13307 100644 --- a/include/linux/nl80211.h +++ b/include/linux/nl80211.h @@ -2104,6 +2104,9 @@ enum nl80211_mntr_flags { * TUs) during which a mesh STA can send only one Action frame containing a * PERR element. * + * @NL80211_MESHCONF_FORWARDING: set Mesh STA as forwarding or non-forwarding + * or forwarding entity (default is TRUE - forwarding entity) + * * @NL80211_MESHCONF_ATTR_MAX: highest possible mesh configuration attribute * * @__NL80211_MESHCONF_ATTR_AFTER_LAST: internal use @@ -2128,6 +2131,7 @@ enum nl80211_meshconf_params { NL80211_MESHCONF_HWMP_RANN_INTERVAL, NL80211_MESHCONF_GATE_ANNOUNCEMENTS, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL, + NL80211_MESHCONF_FORWARDING, /* keep last */ __NL80211_MESHCONF_ATTR_AFTER_LAST, diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 208a7b5f8d49..281899167d2d 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -798,6 +798,7 @@ struct mesh_config { * mesh gate, but not necessarily using the gate announcement protocol. * Still keeping the same nomenclature to be in sync with the spec. */ bool dot11MeshGateAnnouncementProtocol; + bool dot11MeshForwarding; }; /** diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 74c9301681e5..98460783c2d3 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -1346,6 +1346,8 @@ static int ieee80211_update_mesh_config(struct wiphy *wiphy, conf->dot11MeshHWMPRannInterval = nconf->dot11MeshHWMPRannInterval; } + if (_chg_mesh_attr(NL80211_MESHCONF_FORWARDING, mask)) + conf->dot11MeshForwarding = nconf->dot11MeshForwarding; return 0; } diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c index 176c08ffb13c..81d12e65a23c 100644 --- a/net/mac80211/debugfs_netdev.c +++ b/net/mac80211/debugfs_netdev.c @@ -422,6 +422,7 @@ IEEE80211_IF_FILE(dot11MeshGateAnnouncementProtocol, u.mesh.mshcfg.dot11MeshGateAnnouncementProtocol, DEC); IEEE80211_IF_FILE(dot11MeshHWMPRannInterval, u.mesh.mshcfg.dot11MeshHWMPRannInterval, DEC); +IEEE80211_IF_FILE(dot11MeshForwarding, u.mesh.mshcfg.dot11MeshForwarding, DEC); #endif diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c index 73abb7524b2c..cae407136ae0 100644 --- a/net/mac80211/mesh_hwmp.c +++ b/net/mac80211/mesh_hwmp.c @@ -575,7 +575,7 @@ static void hwmp_preq_frame_process(struct ieee80211_sub_if_data *sdata, ifmsh->mshstats.dropped_frames_ttl++; } - if (forward) { + if (forward && ifmsh->mshcfg.dot11MeshForwarding) { u32 preq_id; u8 hopcount, flags; diff --git a/net/wireless/mesh.c b/net/wireless/mesh.c index 8c550df13037..9d3e3b6bfcf4 100644 --- a/net/wireless/mesh.c +++ b/net/wireless/mesh.c @@ -55,6 +55,7 @@ const struct mesh_config default_mesh_config = { .min_discovery_timeout = MESH_MIN_DISCOVERY_TIMEOUT, .dot11MeshHWMPRannInterval = MESH_RANN_INTERVAL, .dot11MeshGateAnnouncementProtocol = false, + .dot11MeshForwarding = true, }; const struct mesh_setup default_mesh_setup = { diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 5cefd74ab47d..c42173f947ef 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -3258,6 +3258,8 @@ static int nl80211_get_mesh_config(struct sk_buff *skb, cur_params.dot11MeshHWMPRannInterval); NLA_PUT_U8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS, cur_params.dot11MeshGateAnnouncementProtocol); + NLA_PUT_U8(msg, NL80211_MESHCONF_FORWARDING, + cur_params.dot11MeshForwarding); nla_nest_end(msg, pinfoattr); genlmsg_end(msg, hdr); return genlmsg_reply(msg, info); @@ -3289,6 +3291,7 @@ static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_A [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 }, [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 }, [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 }, + [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 }, }; static const struct nla_policy @@ -3378,6 +3381,8 @@ do {\ dot11MeshGateAnnouncementProtocol, mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS, nla_get_u8); + FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, + mask, NL80211_MESHCONF_FORWARDING, nla_get_u8); if (mask_out) *mask_out = mask;