X-Git-Url: https://git.xandkar.net/?a=blobdiff_plain;f=home%2Fbin%2Farp-recon;h=6444a3816c1056a09f57d20a63b218ccd74cff58;hb=HEAD;hp=e53d2ea11c57f025c485d292e97632e3c08ea149;hpb=83b73f79e224acea204636f6d51c6324e50ac868;p=khome.git

diff --git a/home/bin/arp-recon b/home/bin/arp-recon
index e53d2ea..6444a38 100755
--- a/home/bin/arp-recon
+++ b/home/bin/arp-recon
@@ -44,14 +44,22 @@ debug() {
 }
 
 log() {
-    local -r interval="$1"
+    local -r interval_init="$1"
     local -r log_file="$2"
+    local    interval_curr="$interval_init"
 
     while :; do
         debug '(>) scan'
-        sudo arp-scan --localnet;
-        debug '(.) scan'
-        sleep "$interval";
+        if sudo arp-scan --localnet; then
+            debug '(.) scan ok'
+            interval_curr="$interval_init"
+        else
+            error '(.) scan failure'
+            interval_curr=$(( interval_curr * 2 ))
+        fi
+        debug '(>) sleep for %d seconds' "$interval_curr"
+        sleep "$interval_curr";
+        debug '(.) sleep'
     done \
     | stdbuf -o L awk '
         /^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+/ {