webif ccfg: implement server side handler

2 files changed, 105 insertions, 6 deletions

diff --git a/files/common/www/service/cgi-bin/cfg_client.commit b/files/common/www/service/cgi-bin/cfg_client.commit
new file mode 100644
index 0000000..bf5d50c
--- /dev/null
+++ b/files/common/www/service/cgi-bin/cfg_client.commit
@@ -0,0 +1,49 @@
+update_cfgtbl() {
+    if [ "$cmode"   == $cmode_default ];   then cmode=;   fi
+    if [ "$csplash" == $csplash_default ]; then csplash=; fi
+    p2ptbl update  $tbl $mac "$cname,$cmode,$csplash,$cip"
+}
+
+# parse changes
+while read key val; do
+    case "$key" in 
+	client_access)
+	    case "$val" in
+		bridged|routed|isolated) cmode=$val;;
+		*) fail;;
+	    esac
+	    lazy 20 splash_sync
+	    ;;
+	client_name)
+	    [ -z "$(echo "$val" | tr -d '0-9a-z_')" ] \
+		|| fail 400 'Unerlaubte Zeichen verwendet'
+	    [ "$val" != "$cname" ] \
+		|| continue
+	    [ -z "$(p2ptbl show $tbl | cut -f2 | grep "^$val,")" ] \
+		|| fail 403 'Name bereits vergeben'
+	    cname=$val
+	    lazy 10 sync_dhcp
+	    ;;
+	# client_splash is send iff. it is checked; update_splash is
+	# send in every case
+	update_splash)
+	    update_splash=${update_splash-false}
+	    lazy 20 splash_sync
+	    ;;
+	client_splash)
+	    update_splash=true
+	    ;;
+	*)
+	    fail 400 "wtf is $key?"
+	    ;;
+    esac
+done <<EOF
+$(tr '=&' ' \n')
+EOF
+
+if [ -n "$update_splash" ]; then
+    csplash=$update_splash
+fi
+
+# update p2ptbl entry
+lazy 00 update_cfgtbl
diff --git a/files/common/www/service/cgi-bin/cfg_client.json b/files/common/www/service/cgi-bin/cfg_client.json
index dc675c9..fc74393 100755
--- a/files/common/www/service/cgi-bin/cfg_client.json
+++ b/files/common/www/service/cgi-bin/cfg_client.json
@@ -1,9 +1,59 @@
-#!/bin/sh
+#!/bin/sh -e
+. /www/service/cgi-bin/common.sh
 
-echo -e 'Status: 200 OK\r
+# determine for which mac we get/put
+read mac iface <<EOF
+$(grep ^$REMOTE_HOST </proc/net/arp \
+    | awk 'BEGIN { FS = " " } ; { print $4, $6 }')
+EOF
+[ -n "$mac" ]
+
+if [ -n "$QUERY_STRING" ]; then
+    check_node_auth
+    mac="$(echo "$QUERY_STRING" | tr -dc '0-9a-fA-F')"
+fi
+
+# get current settings and default settings
+case $iface in
+    br-lan)
+	tbl=/tmp/p2ptbl/ccfg_wire
+	cmode_default=$(uci get system.mesh.lan_client_mode)
+	;;
+    br-mesh)
+	tbl=/tmp/p2ptbl/ccfg_wire
+	cmode_default=bridged
+	;;
+    *) fail;;
+esac
+csplash_default=false
+
+# get config from p2ptbl; parse it only if existent; hint: the default
+# value for each config value is empty
+cfg_line=$(p2ptbl get $tbl $mac)
+if [ -n "$cfg_line" ]; then
+    IFS="," read cname cmode csplash cip <<EOF
+$cfg_line
+EOF
+fi
+cmode=${cmode-$cmode_default}
+csplash=${csplash-$csplash_default}
+
+if [ $REQUEST_METHOD == POST ]; then
+    . /www/service/cgi-bin/cfg_client.commit
+fi
+
+# set all empty variables to their default values
+if [ "$csplash" != true ]; then
+    csplash=false
+fi
+
+# respond with [updated] settings
+echo -e "Status: 200 OK\r
 Content-Type: application/json\r
 \r
-{"client_name": "mobilaptop",
- "client_splash": [false],
- "client_access": ["bridged"]
-}'
+{\"client_name\": \"$cname\",
+ \"client_splash\": [$csplash],
+ \"client_access\": [\"$cmode\"]
+}"
+
+exec_lazy