From 2587b68b1c376a2ca4d01ac08732d1a6e3b55196 Mon Sep 17 00:00:00 2001 From: monthadar Date: Thu, 7 Feb 2013 21:31:37 +0000 Subject: [PATCH] Mesh HWMP forwarding information: updating FI for transmitter. * Added hwmp_update_transmitter function that checks if the metric to the transmitter have improved. If old FI is invalid or metric is larger the FI to the transmitter is updated occurdingly. This is a recommendation from the 802.11 2012 standard, table 13-9; Approved by: adrian (mentor) --- sys/net80211/ieee80211_hwmp.c | 49 +++++++++++++++++++++++++++++++---- 1 file changed, 44 insertions(+), 5 deletions(-) diff --git a/sys/net80211/ieee80211_hwmp.c b/sys/net80211/ieee80211_hwmp.c index 206a4a4695e..414ac53f6a7 100644 --- a/sys/net80211/ieee80211_hwmp.c +++ b/sys/net80211/ieee80211_hwmp.c @@ -896,6 +896,45 @@ hwmp_rootmode_rann_cb(void *arg) hwmp_rootmode_setup(vap); } +/* + * Update forwarding information to TA if metric improves. + */ +static void +hwmp_update_transmitter(struct ieee80211vap *vap, struct ieee80211_node *ni, + const char *hwmp_frame) +{ + struct ieee80211_mesh_state *ms = vap->iv_mesh; + struct ieee80211_mesh_route *rttran = NULL; /* Transmitter */ + int metric = 0; + + rttran = ieee80211_mesh_rt_find(vap, ni->ni_macaddr); + if (rttran == NULL) { + rttran = ieee80211_mesh_rt_add(vap, ni->ni_macaddr); + if (rttran == NULL) { + IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, + "unable to add path to transmitter %6D of %s", + ni->ni_macaddr, ":", hwmp_frame); + vap->iv_stats.is_mesh_rtaddfailed++; + return; + } + } + metric = ms->ms_pmetric->mpm_metric(ni); + if (!(rttran->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) || + rttran->rt_metric > metric) + { + IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, + "%s path to transmiter %6D of %s, metric %d:%d", + rttran->rt_flags & IEEE80211_MESHRT_FLAGS_VALID ? + "prefer" : "update", ni->ni_macaddr, ":", hwmp_frame, + rttran->rt_metric, metric); + IEEE80211_ADDR_COPY(rttran->rt_nexthop, ni->ni_macaddr); + rttran->rt_metric = metric; + rttran->rt_nhops = 1; + ieee80211_mesh_rt_update(rttran, ms->ms_ppath->mpp_inact); + rttran->rt_flags = IEEE80211_MESHRT_FLAGS_VALID; + } +} + #define PREQ_TFLAGS(n) preq->preq_targets[n].target_flags #define PREQ_TADDR(n) preq->preq_targets[n].target_addr #define PREQ_TSEQ(n) preq->preq_targets[n].target_seq @@ -1010,10 +1049,8 @@ hwmp_recv_preq(struct ieee80211vap *vap, struct ieee80211_node *ni, return; } - /* - * Forwarding information for transmitter mesh STA - * [OPTIONAL: if metric improved] - */ + /* Update forwarding information to TA if metric improves. */ + hwmp_update_transmitter(vap, ni, "PREQ"); /* * Check if the PREQ is addressed to us. @@ -1268,7 +1305,6 @@ hwmp_recv_prep(struct ieee80211vap *vap, struct ieee80211_node *ni, * rules defined in 13.10.8.4). If the conditions for creating or * updating the forwarding information have not been met in those * rules, no further steps are applied to the PREP. - * [OPTIONAL]: update forwarding information to TA if metric improves. */ rt = ieee80211_mesh_rt_find(vap, prep->prep_targetaddr); if (rt == NULL) { @@ -1323,6 +1359,9 @@ hwmp_recv_prep(struct ieee80211vap *vap, struct ieee80211_node *ni, } rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID; /* mark valid */ + /* Update forwarding information to TA if metric improves */ + hwmp_update_transmitter(vap, ni, "PREP"); + /* * If it's NOT for us, propagate the PREP */ -- 2.45.0