1 files changed, 91 insertions, 0 deletions
diff --git a/api/filter.go b/api/filter.go
new file mode 100644
index 0000000..3b6664d
--- /dev/null
+++ b/api/filter.go
@@ -0,0 +1,91 @@
+package api
+
+import (
+	"encoding/json"
+	"log"
+	"net"
+
+	"github.com/cilium/cilium/pkg/mac"
+	"sinanmohd.com/redq/bpf/filter"
+)
+
+type FilterResp map[string]string
+
+func handleFilterBlock(conn net.Conn, f *filter.Filter, macs []string) {
+	resp := make(FilterResp)
+
+	for _, mac_string := range macs {
+		mac, err := mac.ParseMAC(mac_string)
+		if err != nil {
+			resp[mac_string] = err.Error()
+			continue
+		}
+
+		mac_cilium64, err := mac.Uint64()
+		if err != nil {
+			resp[mac_string] = err.Error()
+			continue
+		}
+
+		err = f.Block(uint64(mac_cilium64))
+		if err != nil {
+			resp[mac_string] = err.Error()
+			continue
+		}
+
+		resp[mac_string] = "blocked"
+	}
+
+	buf, err := json.Marshal(resp)
+	if err != nil {
+		log.Printf("marshaling json: %s", err)
+		return
+	}
+
+	conn.Write(buf)
+}
+
+func handleFilterUnblock(conn net.Conn, f *filter.Filter, macs []string) {
+	resp := make(FilterResp)
+
+	for _, mac_string := range macs {
+		mac, err := mac.ParseMAC(mac_string)
+		if err != nil {
+			resp[mac_string] = err.Error()
+			continue
+		}
+
+		mac_cilium64, err := mac.Uint64()
+		if err != nil {
+			resp[mac_string] = err.Error()
+			continue
+		}
+
+		err = f.Unblock(uint64(mac_cilium64))
+		if err != nil {
+			resp[mac_string] = err.Error()
+			continue
+		}
+
+		resp[mac_string] = "unblocked"
+	}
+
+	buf, err := json.Marshal(resp)
+	if err != nil {
+		log.Printf("marshaling json: %s", err)
+		return
+	}
+
+	conn.Write(buf)
+}
+
+func handleFilter(conn net.Conn, f *filter.Filter, macs []string, action string) {
+	switch action {
+	case "block":
+		handleFilterBlock(conn, f, macs)
+	case "unblock":
+		handleFilterUnblock(conn, f, macs)
+	default:
+		log.Printf("handling dns: invalid action '%s'", action)
+	}
+}