Hello,
31C3 had lots of access points sharing a network ID. Coming up with an
AWK script to determine the network with the best coverage is easy, but
still harder than simply choosing the first one that ifconfig iwn0 scan
would spit out if only its output was sorted by signal strength (and in
decreasing order, as by convention).
Index: ifconfig.c
===================================================================
RCS file: /cvs/src/sbin/ifconfig/ifconfig.c,v
retrieving revision 1.290
diff -u -p -u -r1.290 ifconfig.c
--- ifconfig.c 1 Jan 2015 22:53:39 -0000 1.290
+++ ifconfig.c 2 Jan 2015 18:29:06 -0000
@@ -2221,6 +2221,17 @@ ieee80211_listchans(void)
}
}
+/*
+ * Returns an integer less than, equal to, or greater than zero if nr1's
+ * RSSI is respectively greater than, equal to, or less than nr2's RSSI.
+ */
+static int
+rssicmp(const void *nr1, const void *nr2)
+{
+ const struct ieee80211_nodereq *x = nr1, *y = nr2;
+ return y->nr_rssi < x->nr_rssi ? -1 : y->nr_rssi > x->nr_rssi;
+}
+
void
ieee80211_listnodes(void)
{
@@ -2256,6 +2267,8 @@ ieee80211_listnodes(void)
if (!na.na_nodes)
printf("\t\tnone\n");
+ else
+ qsort(nr, na.na_nodes, sizeof(*nr), rssicmp);
for (i = 0; i < na.na_nodes; i++) {
printf("\t\t");
--
Simon Nicolussi <si...@sinic.name>
http{s,}://{www.,}sinic.name/
