diff --git a/ndhc/packet.h b/ndhc/packet.h
index 86c4b9c..53b464d 100644
--- a/ndhc/packet.h
+++ b/ndhc/packet.h
@@ -5,36 +5,36 @@
 #include <netinet/ip.h>
 
 struct dhcpMessage {
-	uint8_t op;
-	uint8_t htype;
-	uint8_t hlen;
-	uint8_t hops;
-	uint32_t xid;
-	uint16_t secs;
-	uint16_t flags;
-	uint32_t ciaddr;
-	uint32_t yiaddr;
-	uint32_t siaddr;
-	uint32_t giaddr;
-	uint8_t chaddr[16];
-	uint8_t sname[64];
-	uint8_t file[128];
-	uint32_t cookie;
-	uint8_t options[308]; /* 312 - cookie */
+    uint8_t op;
+    uint8_t htype;
+    uint8_t hlen;
+    uint8_t hops;
+    uint32_t xid;
+    uint16_t secs;
+    uint16_t flags;
+    uint32_t ciaddr;
+    uint32_t yiaddr;
+    uint32_t siaddr;
+    uint32_t giaddr;
+    uint8_t chaddr[16];
+    uint8_t sname[64];
+    uint8_t file[128];
+    uint32_t cookie;
+    uint8_t options[308]; /* 312 - cookie */
 };
 
 struct udp_dhcp_packet {
-	struct iphdr ip;
-	struct udphdr udp;
-	struct dhcpMessage data;
+    struct iphdr ip;
+    struct udphdr udp;
+    struct dhcpMessage data;
 };
 
 int get_packet(struct dhcpMessage *packet, int fd);
 uint16_t checksum(void *addr, int count);
-int raw_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_port,
-		   uint32_t dest_ip, int dest_port, unsigned char *dest_arp, int ifindex);
-int kernel_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_port,
-		   uint32_t dest_ip, int dest_port);
-
+int raw_packet(struct dhcpMessage *payload, uint32_t source_ip,
+               int source_port, uint32_t dest_ip, int dest_port,
+               unsigned char *dest_arp, int ifindex);
+int kernel_packet(struct dhcpMessage *payload, uint32_t source_ip,
+                  int source_port, uint32_t dest_ip, int dest_port);
 
 #endif