Merge pull request #4 from ZeroChaos-/netmode_auto

netmode fixes and auto mode

usr/bin/NETMODE

@@ -1,17 +1,65 @@
 #!/bin/bash
 
 function show_usage() {
-    echo "Usage: $0 [DHCP_CLIENT|DHCP_SERVER]"
+    echo "Usage: $0 [DHCP_CLIENT|DHCP_SERVER|AUTO]"
     echo ""
 }
 
+function shut_it_all_down() {
+    #we are restarting, possibly with new config, or reversing dhcp roles
+    #kill 'em all, let the user sort them out
+    /etc/init.d/odhcpd stop
+    pkill -9 dnsmasq #odhcpd starts dnsmasq but fails to stop it
+    pkill -9 udhcpc #this is the observed dhcp client
+    pkill -9 odhcpcd #just in case
+}
+
+function configure_client() {
+    shut_it_all_down
+    uci set network.lan.proto='dhcp'
+}
+
+function configure_server() {
+    shut_it_all_down
+    uci set network.lan.proto='static'
+    uci set network.lan.ipaddr='172.16.24.1'
+    uci set network.lan.netmask='255.255.255.0'
+    uci set network.lan.ip6assign='60'
+    /etc/init.d/odhcpd start
+}
+
+function blink() {
+  count 3
+  while [ "${count}" -gt 0 ]; do
+    LED "${1}"
+    sleep 0.25
+    LED "${2}"
+    sleep 0.25
+    count=$((count-1))
+  done
+}
+
 case $1 in
     "DHCP_CLIENT")
-        uci set network.lan.proto='dhcp'
+        configure_client
         ;;
     "DHCP_SERVER")
-        uci set network.lan.proto='none'
-        /etc/init.d/odhcpd start
+        configure_server
+        ;;
+    "AUTO")
+        #make sure nothing interferes
+        shut_it_all_down
+        #this will exit 0 if a dhcp discovery/request packet is seen, and 124 if not
+        sniffed="$(timeout -t 15 tcpdump -Z nobody -i eth0 -c 3 udp src port 68 and udp dst port 67 -v 2>&1)"
+        if echo "${sniffed}" | grep -q 'DHCP-Message Option 53, length 1: Discover' && \
+          ! echo "${sniffed}" | grep -q 'DHCP-Message Option 53, length 1: Request'; then
+            #we saw a dhcp discover but no dhcp request, so someone wants a dhcp server and didn't find one
+            configure_server
+            echo 'blink SETUP Y' | at now
+        else
+            configure_client
+            echo 'blink SETUP W' | at now
+        fi
         ;;
     *)
         show_usage

usr/bin/shark_framework

@@ -197,16 +197,19 @@ function enter_idle_mode() {
     while true
     do
         if [[ $MODE = "ARMING" ]] || [[ $MODE = "OFF" ]]; then
+            #ARMING mode is basically always idle which means this overrides user LED
+            #status once per second.  Don't override user status with idle status.
+            #pgrep LED > /dev/null || /usr/bin/LED whatever
             BATTERY_STATE=$(/usr/bin/BATTERY)
             case $BATTERY_STATE in
                 "charging")
-                    /usr/bin/LED B SLOW
+                    pgrep LED > /dev/null || /usr/bin/LED B SLOW
                     ;;
                 "full")
-                    /usr/bin/LED B
+                    pgrep LED > /dev/null || /usr/bin/LED B
                     ;;
                 *)
-                    /usr/bin/LED Y SLOW
+                    pgrep LED > /dev/null || /usr/bin/LED Y SLOW
                     if [[ $MODE = "OFF" ]]; then
                         sleep 2 && halt
                     fi