fix: enhance database schema for packet metadata and improve data types

setup_database.sh

@@ -51,30 +51,36 @@ CREATE TABLE IF NOT EXISTS packets (
     id BIGSERIAL PRIMARY KEY,
     timestamp TIMESTAMPTZ DEFAULT NOW(),
 
-    -- interface metadata
+    -- Interface metadata
     iface VARCHAR(64),
     direction VARCHAR(16),
 
     -- Ethernet
-    src_mac VARCHAR(32),
-    dst_mac VARCHAR(32),
-    eth_type INTEGER,
+    src_mac MACADDR,
+    dst_mac MACADDR,
+    eth_type VARCHAR(16),
 
-    -- IP
-    src_ip VARCHAR(64),
-    dst_ip VARCHAR(64),
-    protocol INTEGER,
+    -- VLAN
+    vlan_id INTEGER,
+
+    -- IP layer
+    src_ip INET,
+    dst_ip INET,
+    ip_proto VARCHAR(32),
+
+    -- Transport layer
+    src_port INTEGER,
+    dst_port INTEGER,
+
+    -- Packet metadata
     length INTEGER,
 
-    -- eBPF data (reserved for later)
-    ebpf_verdict VARCHAR(32),
-    ebpf_chain VARCHAR(64),
-
-    -- full packet
+    -- Full packet dump
     raw BYTEA
 );
 EOF
 
+
 echo "[7] Grant privileges to user…"
 sudo -u postgres psql -d $DB_NAME <<EOF
 -- Grant all table privileges