From 05a23ae927d1eb0491064fddaa8b1531a84def6f Mon Sep 17 00:00:00 2001 From: Thomas Pedersen Date: Tue, 5 Nov 2013 11:16:59 -0800 Subject: [PATCH] mac80211: factor peering frame processing into own function Signed-off-by: Thomas Pedersen Signed-off-by: Johannes Berg --- net/mac80211/mesh_plink.c | 88 ++++++++++++++++++++++++++--------------------- 1 file changed, 48 insertions(+), 40 deletions(-) diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c index 429f692..c234ddb 100644 --- a/net/mac80211/mesh_plink.c +++ b/net/mac80211/mesh_plink.c @@ -691,54 +691,29 @@ static u32 mesh_plink_establish(struct ieee80211_sub_if_data *sdata, return changed; } - -void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, - struct ieee80211_mgmt *mgmt, size_t len, - struct ieee80211_rx_status *rx_status) +static void +mesh_process_plink_frame(struct ieee80211_sub_if_data *sdata, + struct ieee80211_mgmt *mgmt, + struct ieee802_11_elems *elems) { + struct mesh_config *mshcfg = &sdata->u.mesh.mshcfg; enum ieee80211_self_protected_actioncode action = 0; - struct ieee802_11_elems elems; struct sta_info *sta; enum plink_event event; enum ieee80211_self_protected_actioncode ftype; - size_t baselen; bool matches_local; - u8 ie_len; - u8 *baseaddr; u32 changed = 0; + u8 ie_len; __le16 plid, llid; - /* need action_code, aux */ - if (len < IEEE80211_MIN_ACTION_SIZE + 3) - return; - - if (sdata->u.mesh.user_mpm) - /* userspace must register for these */ - return; - - if (is_multicast_ether_addr(mgmt->da)) { - mpl_dbg(sdata, - "Mesh plink: ignore frame from multicast address\n"); - return; - } - - baseaddr = mgmt->u.action.u.self_prot.variable; - baselen = (u8 *) mgmt->u.action.u.self_prot.variable - (u8 *) mgmt; - if (mgmt->u.action.u.self_prot.action_code == - WLAN_SP_MESH_PEERING_CONFIRM) { - baseaddr += 4; - baselen += 4; - } - ieee802_11_parse_elems(baseaddr, len - baselen, true, &elems); - - if (!elems.peering) { + if (!elems->peering) { mpl_dbg(sdata, "Mesh plink: missing necessary peer link ie\n"); return; } - if (elems.rsn_len && + if (elems->rsn_len && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) { mpl_dbg(sdata, "Mesh plink: can't establish link with secure peer\n"); @@ -746,7 +721,7 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, } ftype = mgmt->u.action.u.self_prot.action_code; - ie_len = elems.peering_len; + ie_len = elems->peering_len; if ((ftype == WLAN_SP_MESH_PEERING_OPEN && ie_len != 4) || (ftype == WLAN_SP_MESH_PEERING_CONFIRM && ie_len != 6) || (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len != 6 @@ -758,25 +733,25 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, } if (ftype != WLAN_SP_MESH_PEERING_CLOSE && - (!elems.mesh_id || !elems.mesh_config)) { + (!elems->mesh_id || !elems->mesh_config)) { mpl_dbg(sdata, "Mesh plink: missing necessary ie\n"); return; } /* Note the lines below are correct, the llid in the frame is the plid * from the point of view of this host. */ - memcpy(&plid, PLINK_GET_LLID(elems.peering), 2); + memcpy(&plid, PLINK_GET_LLID(elems->peering), 2); if (ftype == WLAN_SP_MESH_PEERING_CONFIRM || (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len == 8)) - memcpy(&llid, PLINK_GET_PLID(elems.peering), 2); + memcpy(&llid, PLINK_GET_PLID(elems->peering), 2); /* WARNING: Only for sta pointer, is dropped & re-acquired */ rcu_read_lock(); sta = sta_info_get(sdata, mgmt->sa); - matches_local = ftype == WLAN_SP_MESH_PEERING_CLOSE || - mesh_matches_local(sdata, &elems); + matches_local = (ftype == WLAN_SP_MESH_PEERING_CLOSE || + mesh_matches_local(sdata, elems)); if (ftype == WLAN_SP_MESH_PEERING_OPEN && !rssi_threshold_check(sdata, sta)) { @@ -872,7 +847,7 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, if (event == OPN_ACPT) { rcu_read_unlock(); /* allocate sta entry if necessary and update info */ - sta = mesh_sta_info_get(sdata, mgmt->sa, &elems); + sta = mesh_sta_info_get(sdata, mgmt->sa, elems); if (!sta) { mpl_dbg(sdata, "Mesh plink: failed to init peer!\n"); rcu_read_unlock(); @@ -1028,3 +1003,36 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, if (changed) ieee80211_mbss_info_change_notify(sdata, changed); } + +void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, + struct ieee80211_mgmt *mgmt, size_t len, + struct ieee80211_rx_status *rx_status) +{ + struct ieee802_11_elems elems; + size_t baselen; + u8 *baseaddr; + + /* need action_code, aux */ + if (len < IEEE80211_MIN_ACTION_SIZE + 3) + return; + + if (sdata->u.mesh.user_mpm) + /* userspace must register for these */ + return; + + if (is_multicast_ether_addr(mgmt->da)) { + mpl_dbg(sdata, + "Mesh plink: ignore frame from multicast address\n"); + return; + } + + baseaddr = mgmt->u.action.u.self_prot.variable; + baselen = (u8 *) mgmt->u.action.u.self_prot.variable - (u8 *) mgmt; + if (mgmt->u.action.u.self_prot.action_code == + WLAN_SP_MESH_PEERING_CONFIRM) { + baseaddr += 4; + baselen += 4; + } + ieee802_11_parse_elems(baseaddr, len - baselen, true, &elems); + mesh_process_plink_frame(sdata, mgmt, &elems); +} -- 2.7.4