fixup whitespace

README

@@ -10,30 +10,30 @@ compile time options
 -------------------
 
 The Makefile contains three of the compile time options:
-	
+
 	UDHCP_DEBUG: If UDHCP_DEBUG is defined, udhcpd will output extra
 	debugging output, compile with -g, and not fork to the background when
 	run.
 	UDHCP_SYSLOG: If UDHCP_SYSLOG is defined, udhcpd will log all its
 	messages syslog, otherwise, it will attempt to log them to stdout.
-	
+
 	COMBINED_BINARY: If COMBINED_BINARY is define, one binary, udhcpd,
 	is created. If called as udhcpd, the dhcp server will be started.
 	If called as udhcpc, the dhcp client will be started.
-	
+
 dhcpd.h contains the other three compile time options:
-	
+
 	LEASE_TIME: The default lease time if not specified in the config
 	file.
 
 	LEASES_FILE: The default file for storing leases.
-	
+
 	DHCPD_CONFIG_FILE: The defualt config file to use.
-	
+
 options.c contains a set of dhcp options for the client:
 
 	name[10]: The name of the option as it will appear in scripts
-	
+
 	flags: The type of option, as well as if it will be requested
 	by the client (OPTION_REQ)
 
@@ -45,7 +45,7 @@ busybox drop-in
 udhcp is now a drop-in component for busybox (http://busybox.net).
 To update busybox to the latest revision, simply do a:
 
-cp *.[ch] README AUTHORS COPYING ChangeLog TODO \ 
+cp *.[ch] README AUTHORS COPYING ChangeLog TODO \
 	<busybox_source>/networking/udhcp
 
 The only two files udhcp does not provide are config.in and

README.udhcpc

@@ -36,20 +36,20 @@ udhcp client scripts
 
 When an event occurs, udhcpc calls the action script. udhcpc never does
 any configuration of the network interface itself, but instead relies on
-a set of scripts. The script by default is 
+a set of scripts. The script by default is
 /usr/share/udhcpc/default.script but this can be changed via the command
 line arguments. The three possible arguments to the script are:
 
 	deconfig: This argument is used when udhcpc starts, and
 	when a leases is lost. The script must put the interface in an
 	up, but deconfigured state, ie: ifconfig $interface 0.0.0.0.
-	
+
 	bound: This argument is used when udhcpc moves from an
 	unbound, to a bound state. All of the paramaters are set in
 	enviromental variables, The script should configure the interface,
-	and set any other relavent parameters (default gateway, dns server, 
+	and set any other relavent parameters (default gateway, dns server,
 	etc).
-	
+
 	renew: This argument is used when a DHCP lease is renewed. All of
 	the paramaters are set in enviromental variables. This argument is
 	used when the interface is already configured, so the IP address,
@@ -133,7 +133,7 @@ compile time options
 options.c contains a set of dhcp options for the client:
 
 	name[10]: The name of the option as it will appear in scripts
-	
+
 	flags: The type of option, as well as if it will be requested
 	by the client (OPTION_REQ)
 

README.udhcpd

@@ -14,7 +14,7 @@ udhcpd.leases
 
 The udhcpd.leases behavior is designed for an embedded system. The
 file is written either every auto_time seconds, or when a SIGUSR1
-is received (the auto_time timer restarts if a SIGUSR1 is received). 
+is received (the auto_time timer restarts if a SIGUSR1 is received).
 If you send a SIGTERM to udhcpd directly after a SIGUSR1, udhcpd will
 finish writing the leases file and wait for the aftermentioned script
 to be executed and finish before quiting, so you do not need to sleep
@@ -50,10 +50,10 @@ available options and comments describing them in samples/udhcpd.conf
 
 compile time options
 -------------------
-	
+
 dhcpd.h contains the other two compile time options:
-	
+
 	LEASE_TIME: The default lease time if not specified in the config
 	file.
-	
+
 	DHCPD_CONFIG_FILE: The defualt config file to use.

arpping.c

@@ -25,8 +25,8 @@
  *		interface - interface to use
  * retn: 	1 addr free
  *		0 addr used
- *		-1 error 
- */  
+ *		-1 error
+ */
 
 /* FIXME: match response against chaddr */
 int arpping(uint32_t yiaddr, uint32_t ip, uint8_t *mac, char *interface)
@@ -51,7 +51,7 @@ int arpping(uint32_t yiaddr, uint32_t ip, uint8_t *mac, char *interface)
 #endif
 		return -1;
 	}
-	
+
 	if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &optval, sizeof(optval)) == -1) {
 		LOG(LOG_ERR, "Could not setsocketopt on raw socket");
 		close(s);
@@ -71,12 +71,12 @@ int arpping(uint32_t yiaddr, uint32_t ip, uint8_t *mac, char *interface)
 	memcpy(arp.sInaddr, &ip, sizeof(ip));		/* source IP address */
 	memcpy(arp.sHaddr, mac, 6);			/* source hardware address */
 	memcpy(arp.tInaddr, &yiaddr, sizeof(yiaddr));	/* target IP address */
-	
+
 	memset(&addr, 0, sizeof(addr));
 	strcpy(addr.sa_data, interface);
 	if (sendto(s, &arp, sizeof(arp), 0, &addr, sizeof(addr)) < 0)
 		rv = 0;
-	
+
 	/* wait arp reply, and check it */
 	tm.tv_usec = 0;
 	time(&prevTime);
@@ -89,8 +89,8 @@ int arpping(uint32_t yiaddr, uint32_t ip, uint8_t *mac, char *interface)
 			if (errno != EINTR) rv = 0;
 		} else if (FD_ISSET(s, &fdset)) {
 			if (recv(s, &arp, sizeof(arp), 0) < 0 ) rv = 0;
-			if (arp.operation == htons(ARPOP_REPLY) && 
-			    bcmp(arp.tHaddr, mac, 6) == 0 && 
+			if (arp.operation == htons(ARPOP_REPLY) &&
+			    bcmp(arp.tHaddr, mac, 6) == 0 &&
 			    *((uint32_t *) arp.sInaddr) == yiaddr) {
 				DEBUG(LOG_INFO, "Valid arp reply receved for this address");
 				rv = 0;
@@ -101,6 +101,6 @@ int arpping(uint32_t yiaddr, uint32_t ip, uint8_t *mac, char *interface)
 		time(&prevTime);
 	}
 	close(s);
-	DEBUG(LOG_INFO, "%salid arp replies for this address", rv ? "No v" : "V");	 
+	DEBUG(LOG_INFO, "%salid arp replies for this address", rv ? "No v" : "V");	
 	return rv;
 }

clientpacket.c

@@ -18,7 +18,7 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
- 
+
 #include <string.h>
 #include <sys/socket.h>
 #include <features.h>
@@ -73,7 +73,7 @@ static void init_packet(struct dhcpMessage *packet, char type)
 		char vendor, length;
 		char str[sizeof("udhcp "VERSION)];
 	} vendor_id = { DHCP_VENDOR,  sizeof("udhcp "VERSION) - 1, "udhcp "VERSION};
-	
+
 	init_header(packet, type);
 	memcpy(packet->chaddr, client_config.arp, 6);
 	add_option_string(packet->options, client_config.clientid);
@@ -112,7 +112,7 @@ int send_discover(unsigned long xid, unsigned long requested)
 
 	add_requests(&packet);
 	LOG(LOG_DEBUG, "Sending discover...");
-	return raw_packet(&packet, INADDR_ANY, CLIENT_PORT, INADDR_BROADCAST, 
+	return raw_packet(&packet, INADDR_ANY, CLIENT_PORT, INADDR_BROADCAST,
 				SERVER_PORT, MAC_BCAST_ADDR, client_config.ifindex);
 }
 
@@ -128,11 +128,11 @@ int send_selecting(unsigned long xid, unsigned long server, unsigned long reques
 
 	add_simple_option(packet.options, DHCP_REQUESTED_IP, requested);
 	add_simple_option(packet.options, DHCP_SERVER_ID, server);
-	
+
 	add_requests(&packet);
 	addr.s_addr = requested;
 	LOG(LOG_DEBUG, "Sending select for %s...", inet_ntoa(addr));
-	return raw_packet(&packet, INADDR_ANY, CLIENT_PORT, INADDR_BROADCAST, 
+	return raw_packet(&packet, INADDR_ANY, CLIENT_PORT, INADDR_BROADCAST,
 				SERVER_PORT, MAC_BCAST_ADDR, client_config.ifindex);
 }
 
@@ -149,12 +149,12 @@ int send_renew(unsigned long xid, unsigned long server, unsigned long ciaddr)
 
 	add_requests(&packet);
 	LOG(LOG_DEBUG, "Sending renew...");
-	if (server) 
+	if (server)
 		ret = kernel_packet(&packet, ciaddr, CLIENT_PORT, server, SERVER_PORT);
 	else ret = raw_packet(&packet, INADDR_ANY, CLIENT_PORT, INADDR_BROADCAST,
 				SERVER_PORT, MAC_BCAST_ADDR, client_config.ifindex);
 	return ret;
-}	
+}
 
 
 /* Unicasts a DHCP release message */
@@ -165,7 +165,7 @@ int send_release(unsigned long server, unsigned long ciaddr)
 	init_packet(&packet, DHCPRELEASE);
 	packet.xid = random_xid();
 	packet.ciaddr = ciaddr;
-	
+
 	add_simple_option(packet.options, DHCP_REQUESTED_IP, ciaddr);
 	add_simple_option(packet.options, DHCP_SERVER_ID, server);
 
@@ -189,20 +189,20 @@ int get_raw_packet(struct dhcpMessage *payload, int fd)
 		usleep(500000); /* possible down interface, looping condition */
 		return -1;
 	}
-	
+
 	if (bytes < (int) (sizeof(struct iphdr) + sizeof(struct udphdr))) {
 		DEBUG(LOG_INFO, "message too short, ignoring");
 		return -2;
 	}
-	
+
 	if (bytes < ntohs(packet.ip.tot_len)) {
 		DEBUG(LOG_INFO, "Truncated packet");
 		return -2;
 	}
-	
+
 	/* ignore any extra garbage bytes */
 	bytes = ntohs(packet.ip.tot_len);
-	
+
 	/* Make sure its the right packet for us, and that it passes sanity checks */
 	if (packet.ip.protocol != IPPROTO_UDP || packet.ip.version != IPVERSION ||
 	    packet.ip.ihl != sizeof(packet.ip) >> 2 || packet.udp.dest != htons(CLIENT_PORT) ||
@@ -219,7 +219,7 @@ int get_raw_packet(struct dhcpMessage *payload, int fd)
 		DEBUG(LOG_INFO, "bad IP header checksum, ignoring");
 		return -1;
 	}
-	
+
 	/* verify the UDP checksum by replacing the header with a psuedo header */
 	source = packet.ip.saddr;
 	dest = packet.ip.daddr;
@@ -235,14 +235,14 @@ int get_raw_packet(struct dhcpMessage *payload, int fd)
 		DEBUG(LOG_ERR, "packet with bad UDP checksum received, ignoring");
 		return -2;
 	}
-	
+
 	memcpy(payload, &(packet.data), bytes - (sizeof(packet.ip) + sizeof(packet.udp)));
-	
+
 	if (ntohl(payload->cookie) != DHCP_MAGIC) {
 		LOG(LOG_ERR, "received bogus message (bad magic) -- ignoring");
 		return -2;
 	}
 	DEBUG(LOG_INFO, "oooooh!!! got some!");
 	return bytes - (sizeof(packet.ip) + sizeof(packet.udp));
-	
+
 }

common.c

@@ -55,19 +55,18 @@ static inline void sanitize_fds(void)
 void background(const char *pidfile)
 {
 #ifdef __uClinux__
-	LOG(LOG_ERR, "Cannot background in uclinux (yet)");	
+	LOG(LOG_ERR, "Cannot background in uclinux (yet)");
 #else /* __uClinux__ */
 	int pid_fd;
 
-	if (!pidfile) return;
-
-	pid_fd = pidfile_acquire(pidfile); /* hold lock during fork. */
+	/* hold lock during fork. */
+	if (pidfile) pid_fd = pidfile_acquire(pidfile);
 	if (daemon(0, 0) == -1) {
 		perror("fork");
 		exit(1);
 	}
 	daemonized++;
-	pidfile_write_release(pid_fd);
+	if (pidfile) pidfile_write_release(pid_fd);
 #endif /* __uClinux__ */
 }
 
@@ -97,8 +96,10 @@ void start_log_and_pid(const char *client_server, const char *pidfile)
 	sanitize_fds();
 
 	/* do some other misc startup stuff while we are here to save bytes */
-	pid_fd = pidfile_acquire(pidfile);
-	pidfile_write_release(pid_fd);
+	if (pidfile) {
+		pid_fd = pidfile_acquire(pidfile);
+		pidfile_write_release(pid_fd);
+	}
 
 	/* equivelent of doing a fflush after every \n */
 	setlinebuf(stdout);
@@ -144,8 +145,10 @@ void start_log_and_pid(const char *client_server, const char *pidfile)
 	sanitize_fds();
 
 	/* do some other misc startup stuff while we are here to save bytes */
-	pid_fd = pidfile_acquire(pidfile);
-	pidfile_write_release(pid_fd);
+	if (pidfile) {
+		pid_fd = pidfile_acquire(pidfile);
+		pidfile_write_release(pid_fd);
+	}
 
 	/* equivelent of doing a fflush after every \n */
 	setlinebuf(stdout);

common.h

@@ -43,7 +43,7 @@ void background(const char *pidfile);
 void start_log_and_pid(const char *client_server, const char *pidfile);
 void background(const char *pidfile);
 void udhcp_logging(int level, const char *fmt, ...);
-                                                                                
+                                                            
 #define LOG(level, str, args...) udhcp_logging(level, str, ## args)
 
 #ifdef UDHCP_DEBUG

dhcpc.c

@@ -18,7 +18,7 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
- 
+
 #include <sys/time.h>
 #include <sys/file.h>
 #include <unistd.h>
@@ -152,7 +152,7 @@ static void perform_release(void)
 		temp_addr.s_addr = server_addr;
 		sprintf(buffer, "%s", inet_ntoa(temp_addr));
 		temp_addr.s_addr = requested_ip;
-		LOG(LOG_INFO, "Unicasting a release of %s to %s", 
+		LOG(LOG_INFO, "Unicasting a release of %s to %s",
 				inet_ntoa(temp_addr), buffer);
 		send_release(server_addr, requested_ip); /* unicast */
 		run_script(NULL, "deconfig");
@@ -213,7 +213,7 @@ int main(int argc, char *argv[])
 		int option_index = 0;
 		c = getopt_long(argc, argv, "c:fbH:h:i:np:qr:s:v", arg_options, &option_index);
 		if (c == -1) break;
-		
+
 		switch (c) {
 		case 'c':
 			len = strlen(optarg) > 255 ? 255 : strlen(optarg);
@@ -269,10 +269,10 @@ int main(int argc, char *argv[])
 	/* Start the log, sanitize fd's, and write a pid file */
 	start_log_and_pid("udhcpc", client_config.pidfile);
 
-	if (read_interface(client_config.interface, &client_config.ifindex, 
+	if (read_interface(client_config.interface, &client_config.ifindex,
 			   NULL, client_config.arp) < 0)
 		return 1;
-		
+
 	if (!client_config.clientid) {
 		client_config.clientid = xmalloc(6 + 3);
 		client_config.clientid[OPT_CODE] = DHCP_CLIENT_ID;
@@ -282,8 +282,8 @@ int main(int argc, char *argv[])
 	}
 
 	/* setup the signal pipe */
-	udhcp_sp_setup();	
-	
+	udhcp_sp_setup();
+
 	state = INIT_SELECTING;
 	run_script(NULL, "deconfig");
 	change_mode(LISTEN_RAW);
@@ -321,7 +321,7 @@ int main(int argc, char *argv[])
 
 					/* send discover packet */
 					send_discover(xid, requested_ip); /* broadcast */
-					
+
 					timeout = now + ((packet_num == 2) ? 4 : 2);
 					packet_num++;
 				} else {
@@ -345,7 +345,7 @@ int main(int argc, char *argv[])
 					if (state == RENEW_REQUESTED)
 						send_renew(xid, server_addr, requested_ip); /* unicast */
 					else send_selecting(xid, server_addr, requested_ip); /* broadcast */
-					
+
 					timeout = now + ((packet_num == 2) ? 10 : 2);
 					packet_num++;
 				} else {
@@ -373,7 +373,7 @@ int main(int argc, char *argv[])
 				} else {
 					/* send a request packet */
 					send_renew(xid, server_addr, requested_ip); /* unicast */
-					
+
 					t1 = (t2 - t1) / 2 + t1;
 					timeout = t1 + start;
 				}
@@ -403,28 +403,28 @@ int main(int argc, char *argv[])
 			}
 		} else if (retval > 0 && listen_mode != LISTEN_NONE && FD_ISSET(fd, &rfds)) {
 			/* a packet is ready, read it */
-			
+
 			if (listen_mode == LISTEN_KERNEL)
 				len = get_packet(&packet, fd);
 			else len = get_raw_packet(&packet, fd);
-			
+
 			if (len == -1 && errno != EINTR) {
 				DEBUG(LOG_INFO, "error on read, %m, reopening socket");
 				change_mode(listen_mode); /* just close and reopen */
 			}
 			if (len < 0) continue;
-			
+
 			if (packet.xid != xid) {
 				DEBUG(LOG_INFO, "Ignoring XID %lx (our xid is %lx)",
 					(unsigned long) packet.xid, xid);
 				continue;
 			}
-			
+
 			if ((message = get_option(&packet, DHCP_MESSAGE_TYPE)) == NULL) {
 				DEBUG(LOG_ERR, "couldnt get option from packet -- ignoring");
 				continue;
 			}
-			
+
 			switch (state) {
 			case INIT_SELECTING:
 				/* Must be a DHCPOFFER to one of our xid's */
@@ -433,7 +433,7 @@ int main(int argc, char *argv[])
 						memcpy(&server_addr, temp, 4);
 						xid = packet.xid;
 						requested_ip = packet.yiaddr;
-						
+
 						/* enter requesting state */
 						state = REQUESTING;
 						timeout = now;
@@ -455,14 +455,14 @@ int main(int argc, char *argv[])
 						memcpy(&lease, temp, 4);
 						lease = ntohl(lease);
 					}
-						
+
 					/* enter bound state */
 					t1 = lease / 2;
-					
+
 					/* little fixed point for n * .875 */
 					t2 = (lease * 0x7) >> 3;
 					temp_addr.s_addr = packet.yiaddr;
-					LOG(LOG_INFO, "Lease of %s obtained, lease time %ld", 
+					LOG(LOG_INFO, "Lease of %s obtained, lease time %ld",
 						inet_ntoa(temp_addr), lease);
 					start = now;
 					timeout = t1 + start;
@@ -472,7 +472,7 @@ int main(int argc, char *argv[])
 
 					state = BOUND;
 					change_mode(LISTEN_NONE);
-					if (client_config.quit_after_lease) 
+					if (client_config.quit_after_lease)
 						return 0;
 					if (!client_config.foreground)
 						client_background();
@@ -492,10 +492,10 @@ int main(int argc, char *argv[])
 				}
 				break;
 			/* case BOUND, RELEASED: - ignore all packets */
-			}	
+			}
 		} else if (retval > 0 && (sig = udhcp_sp_read(&rfds))) {
 			switch (sig) {
-			case SIGUSR1: 
+			case SIGUSR1:
 				perform_renew();
 				break;
 			case SIGUSR2:
@@ -506,12 +506,12 @@ int main(int argc, char *argv[])
 				return 0;
 			}
 		} else if (retval == -1 && errno == EINTR) {
-			/* a signal was caught */		
+			/* a signal was caught */
 		} else {
 			/* An error occured */
 			DEBUG(LOG_ERR, "Error on select");
 		}
-		
+
 	}
 	return 0;
 }

dhcpd.c

@@ -51,12 +51,12 @@ struct dhcpOfferedAddr *leases;
 struct server_config_t server_config;
 
 
-#ifdef COMBINED_BINARY	
+#ifdef COMBINED_BINARY
 int udhcpd_main(int argc, char *argv[])
 #else
 int main(int argc, char *argv[])
 #endif
-{	
+{
 	fd_set rfds;
 	struct timeval tv;
 	int server_socket = -1;
@@ -70,7 +70,7 @@ int main(int argc, char *argv[])
 	struct dhcpOfferedAddr *lease;
 	int max_sock;
 	unsigned long num_ips;
-	
+
 	memset(&server_config, 0, sizeof(struct server_config_t));
 	read_config(argc < 2 ? DHCPD_CONF_FILE : argv[1]);
 
@@ -82,7 +82,7 @@ int main(int argc, char *argv[])
 		server_config.lease = ntohl(server_config.lease);
 	}
 	else server_config.lease = LEASE_TIME;
-	
+
 	/* Sanity check */
 	num_ips = ntohl(server_config.end) - ntohl(server_config.start);
 	if (server_config.max_leases > num_ips) {
@@ -113,7 +113,7 @@ int main(int argc, char *argv[])
 			if ((server_socket = listen_socket(INADDR_ANY, SERVER_PORT, server_config.interface)) < 0) {
 				LOG(LOG_ERR, "FATAL: couldn't create server socket, %m");
 				return 2;
-			}			
+			}
 
 		max_sock = udhcp_sp_fd_set(&rfds, server_socket);
 		if (server_config.auto_time) {
@@ -121,7 +121,7 @@ int main(int argc, char *argv[])
 			tv.tv_usec = 0;
 		}
 		if (!server_config.auto_time || tv.tv_sec > 0) {
-			retval = select(max_sock + 1, &rfds, NULL, NULL, 
+			retval = select(max_sock + 1, &rfds, NULL, NULL,
 					server_config.auto_time ? &tv : NULL);
 		} else retval = 0; /* If we already timed out, fall through */
 
@@ -133,7 +133,7 @@ int main(int argc, char *argv[])
 			DEBUG(LOG_INFO, "error on select");
 			continue;
 		}
-		
+
 		switch (udhcp_sp_read(&rfds)) {
 		case SIGUSR1:
 			LOG(LOG_INFO, "Received a SIGUSR1");
@@ -161,17 +161,17 @@ int main(int argc, char *argv[])
 			DEBUG(LOG_ERR, "couldn't get option from packet, ignoring");
 			continue;
 		}
-		
+
 		/* ADDME: look for a static lease */
 		lease = find_lease_by_chaddr(packet.chaddr);
 		switch (state[0]) {
 		case DHCPDISCOVER:
 			DEBUG(LOG_INFO,"received DISCOVER");
-			
+
 			if (sendOffer(&packet) < 0) {
 				LOG(LOG_ERR, "send OFFER failed");
 			}
-			break;			
+			break;
  		case DHCPREQUEST:
 			DEBUG(LOG_INFO, "received REQUEST");
 
@@ -180,12 +180,12 @@ int main(int argc, char *argv[])
 
 			if (requested) memcpy(&requested_align, requested, 4);
 			if (server_id) memcpy(&server_id_align, server_id, 4);
-		
+
 			if (lease) { /*ADDME: or static lease */
 				if (server_id) {
 					/* SELECTING State */
 					DEBUG(LOG_INFO, "server_id = %08x", ntohl(server_id_align));
-					if (server_id_align == server_config.server && requested && 
+					if (server_id_align == server_config.server && requested &&
 					    requested_align == lease->yiaddr) {
 						sendACK(&packet, lease->yiaddr);
 					}
@@ -203,9 +203,9 @@ int main(int argc, char *argv[])
 							/* don't know what to do!!!! */
 							sendNAK(&packet);
 						}
-					}						
+					}
 				}
-			
+
 			/* what to do if we have no record of the client */
 			} else if (server_id) {
 				/* SELECTING State */
@@ -218,7 +218,7 @@ int main(int argc, char *argv[])
 						memset(lease->chaddr, 0, 16);
 					/* make some contention for this address */
 					} else sendNAK(&packet);
-				} else if (requested_align < server_config.start || 
+				} else if (requested_align < server_config.start ||
 					   requested_align > server_config.end) {
 					sendNAK(&packet);
 				} /* else remain silent */
@@ -232,7 +232,7 @@ int main(int argc, char *argv[])
 			if (lease) {
 				memset(lease->chaddr, 0, 16);
 				lease->expires = time(0) + server_config.decline_time;
-			}			
+			}
 			break;
 		case DHCPRELEASE:
 			DEBUG(LOG_INFO,"received RELEASE");
@@ -241,7 +241,7 @@ int main(int argc, char *argv[])
 		case DHCPINFORM:
 			DEBUG(LOG_INFO,"received INFORM");
 			send_inform(&packet);
-			break;	
+			break;
 		default:
 			LOG(LOG_WARNING, "unsupported DHCP message (%02x) -- ignoring", state[0]);
 		}

dhcpd.h

@@ -124,10 +124,10 @@ struct server_config_t {
 	uint32_t siaddr;		/* next server bootp option */
 	char *sname;			/* bootp server name */
 	char *boot_file;		/* bootp boot file option */
-};	
+};
 
 extern struct server_config_t server_config;
 extern struct dhcpOfferedAddr *leases;
-		
+
 
 #endif

dumpleases.c

@@ -47,7 +47,7 @@ int main(int argc, char *argv[])
 	const char *file = LEASES_FILE;
 	struct dhcpOfferedAddr lease;
 	struct in_addr addr;
-	
+
 	static const struct option options[] = {
 		{"absolute", 0, 0, 'a'},
 		{"remaining", 0, 0, 'r'},
@@ -59,7 +59,7 @@ int main(int argc, char *argv[])
 		int option_index = 0;
 		c = getopt_long(argc, argv, "arf:", options, &option_index);
 		if (c == -1) break;
-		
+
 		switch (c) {
 		case 'a': mode = ABSOLUTE; break;
 		case 'r': mode = REMAINING; break;
@@ -70,10 +70,10 @@ int main(int argc, char *argv[])
 			show_usage();
 		}
 	}
-			
+
 	fp = xfopen(file, "r");
 
-	printf("Mac Address       IP-Address      Expires %s\n", mode == REMAINING ? "in" : "at");  
+	printf("Mac Address       IP-Address      Expires %s\n", mode == REMAINING ? "in" : "at");
 	/*     "00:00:00:00:00:00 255.255.255.255 Wed Jun 30 21:49:08 1993" */
 	while (fread(&lease, sizeof(lease), 1, fp)) {
 
@@ -105,6 +105,6 @@ int main(int argc, char *argv[])
 		} else printf("%s", ctime(&expires));
 	}
 	fclose(fp);
-	
+
 	return 0;
 }

files.c

@@ -1,8 +1,8 @@
-/* 
+/*
  * files.c -- DHCP server file manipulation *
  * Rewrite by Russ Dill <Russ.Dill@asu.edu> July 2001
  */
- 
+
 #include <sys/socket.h>
 #include <arpa/inet.h>
 #include <string.h>
@@ -16,7 +16,7 @@
 #include "options.h"
 #include "common.h"
 
-/* 
+/*
  * Domain names may have 254 chars, and string options can be 254
  * chars long. However, 80 bytes will be enough for most, and won't
  * hog up memory. If you have a special application, change it
@@ -31,7 +31,7 @@ static int read_ip(const char *line, void *arg)
 	int retval = 1;
 
 	if (!inet_aton(line, addr)) {
-		if ((host = gethostbyname(line))) 
+		if ((host = gethostbyname(line)))
 			addr->s_addr = *((unsigned long *) host->h_addr_list[0]);
 		else retval = 0;
 	}
@@ -42,10 +42,10 @@ static int read_ip(const char *line, void *arg)
 static int read_str(const char *line, void *arg)
 {
 	char **dest = arg;
-	
+
 	if (*dest) free(*dest);
 	*dest = strdup(line);
-	
+
 	return 1;
 }
 
@@ -69,7 +69,7 @@ static int read_yn(const char *line, void *arg)
 	else if (!strcasecmp("no", line))
 		*dest = 0;
 	else retval = 0;
-	
+
 	return retval;
 }
 
@@ -89,11 +89,11 @@ static int read_opt(const char *const_line, void *arg)
 	/* Cheat, the only const line we'll actually get is "" */
 	line = (char *) const_line;
 	if (!(opt = strtok(line, " \t="))) return 0;
-	
+
 	for (option = dhcp_options; option->code; option++)
 		if (!strcasecmp(option->name, opt))
 			break;
-	
+
 	if (!option->code) return 0;
 
 	do {
@@ -134,17 +134,17 @@ static int read_opt(const char *const_line, void *arg)
 			retval = (endptr[0] == '\0');
 			break;
 		case OPTION_U32:
-			*result_u32 = htonl(strtoul(val, &endptr, 0));	
+			*result_u32 = htonl(strtoul(val, &endptr, 0));
 			retval = (endptr[0] == '\0');
 			break;
 		case OPTION_S32:
-			*result_u32 = htonl(strtol(val, &endptr, 0));	
+			*result_u32 = htonl(strtol(val, &endptr, 0));
 			retval = (endptr[0] == '\0');
 			break;
 		default:
 			break;
 		}
-		if (retval) 
+		if (retval)
 			attach_option(opt_list, option, opt, length);
 	} while (retval && option->flags & OPTION_LIST);
 	return retval;
@@ -193,7 +193,7 @@ int read_config(const char *file)
 		LOG(LOG_ERR, "unable to open config file: %s", file);
 		return 0;
 	}
-	
+
 	while (fgets(buffer, READ_CONFIG_BUF_SIZE, in)) {
 		lm++;
 		if (strchr(buffer, '\n')) *(strchr(buffer, '\n')) = '\0';
@@ -203,14 +203,14 @@ int read_config(const char *file)
 		if (strchr(buffer, '#')) *(strchr(buffer, '#')) = '\0';
 
 		if (!(token = strtok(buffer, " \t"))) continue;
-		if (!(line = strtok(NULL, ""))) continue;		
-		
+		if (!(line = strtok(NULL, ""))) continue;
+
 		/* eat leading whitespace */
 		line = line + strspn(line, " \t=");
 		/* eat trailing whitespace */
 		for (i = strlen(line); i > 0 && isspace(line[i - 1]); i--);
 		line[i] = '\0';
-		
+
 		for (i = 0; keywords[i].keyword[0]; i++)
 			if (!strcasecmp(token, keywords[i].keyword))
 				if (!keywords[i].handler(line, keywords[i].var)) {
@@ -232,12 +232,12 @@ void write_leases(void)
 	char buf[255];
 	time_t curr = time(0);
 	unsigned long tmp_time;
-	
+
 	if (!(fp = fopen(server_config.lease_file, "w"))) {
 		LOG(LOG_ERR, "Unable to open %s for writing", server_config.lease_file);
 		return;
 	}
-	
+
 	for (i = 0; i < server_config.max_leases; i++) {
 		if (leases[i].yiaddr != 0) {
 
@@ -257,7 +257,7 @@ void write_leases(void)
 		}
 	}
 	fclose(fp);
-	
+
 	if (server_config.notify_file) {
 		sprintf(buf, "%s %s", server_config.notify_file, server_config.lease_file);
 		system(buf);
@@ -270,12 +270,12 @@ void read_leases(const char *file)
 	FILE *fp;
 	unsigned int i = 0;
 	struct dhcpOfferedAddr lease;
-	
+
 	if (!(fp = fopen(file, "r"))) {
 		LOG(LOG_ERR, "Unable to open %s for reading", file);
 		return;
 	}
-	
+
 	while (i < server_config.max_leases && (fread(&lease, sizeof lease, 1, fp) == 1)) {
 		/* ADDME: is it a static lease */
 		if (lease.yiaddr >= server_config.start && lease.yiaddr <= server_config.end) {
@@ -284,7 +284,7 @@ void read_leases(const char *file)
 			if (!(add_lease(lease.chaddr, lease.yiaddr, lease.expires))) {
 				LOG(LOG_WARNING, "Too many leases while loading %s\n", file);
 				break;
-			}				
+			}
 			i++;
 		}
 	}

frontend.c

@@ -7,10 +7,10 @@ int main(int argc, char *argv[])
 {
 	int ret = 0;
 	char *base = strrchr(argv[0], '/');
-	
+
 	if (strstr(base ? (base + 1) : argv[0], "dhcpd"))
 		ret = udhcpd_main(argc, argv);
 	else ret = udhcpc_main(argc, argv);
-	
+
 	return ret;
 }

leases.c

@@ -1,5 +1,5 @@
-/* 
- * leases.c -- tools to manage DHCP leases 
+/*
+ * leases.c -- tools to manage DHCP leases
  * Russ Dill <Russ.Dill@asu.edu> July 2001
  */
 
@@ -23,9 +23,9 @@ uint8_t blank_chaddr[] = {[0 ... 15] = 0};
 void clear_lease(uint8_t *chaddr, uint32_t yiaddr)
 {
 	unsigned int i, j;
-	
+
 	for (j = 0; j < 16 && !chaddr[j]; j++);
-	
+
 	for (i = 0; i < server_config.max_leases; i++)
 		if ((j != 16 && !memcmp(leases[i].chaddr, chaddr, 16)) ||
 		    (yiaddr && leases[i].yiaddr == yiaddr)) {
@@ -38,18 +38,18 @@ void clear_lease(uint8_t *chaddr, uint32_t yiaddr)
 struct dhcpOfferedAddr *add_lease(uint8_t *chaddr, uint32_t yiaddr, unsigned long lease)
 {
 	struct dhcpOfferedAddr *oldest;
-	
+
 	/* clean out any old ones */
 	clear_lease(chaddr, yiaddr);
-		
+
 	oldest = oldest_expired_lease();
-	
+
 	if (oldest) {
 		memcpy(oldest->chaddr, chaddr, 16);
 		oldest->yiaddr = yiaddr;
 		oldest->expires = time(0) + lease;
 	}
-	
+
 	return oldest;
 }
 
@@ -58,7 +58,7 @@ struct dhcpOfferedAddr *add_lease(uint8_t *chaddr, uint32_t yiaddr, unsigned lon
 int lease_expired(struct dhcpOfferedAddr *lease)
 {
 	return (lease->expires < (unsigned long) time(0));
-}	
+}
 
 
 /* Find the oldest expired lease, NULL if there are no expired leases */
@@ -68,14 +68,14 @@ struct dhcpOfferedAddr *oldest_expired_lease(void)
 	unsigned long oldest_lease = time(0);
 	unsigned int i;
 
-	
+
 	for (i = 0; i < server_config.max_leases; i++)
 		if (oldest_lease > leases[i].expires) {
 			oldest_lease = leases[i].expires;
 			oldest = &(leases[i]);
 		}
 	return oldest;
-		
+
 }
 
 
@@ -86,7 +86,7 @@ struct dhcpOfferedAddr *find_lease_by_chaddr(uint8_t *chaddr)
 
 	for (i = 0; i < server_config.max_leases; i++)
 		if (!memcmp(leases[i].chaddr, chaddr, 16)) return &(leases[i]);
-	
+
 	return NULL;
 }
 
@@ -98,7 +98,7 @@ struct dhcpOfferedAddr *find_lease_by_yiaddr(uint32_t yiaddr)
 
 	for (i = 0; i < server_config.max_leases; i++)
 		if (leases[i].yiaddr == yiaddr) return &(leases[i]);
-	
+
 	return NULL;
 }
 
@@ -120,10 +120,10 @@ static int check_ip(uint32_t addr)
 
 /* find an assignable address, it check_expired is true, we check all the expired leases as well.
  * Maybe this should try expired leases by age... */
-uint32_t find_address(int check_expired) 
+uint32_t find_address(int check_expired)
 {
 	uint32_t addr, ret;
-	struct dhcpOfferedAddr *lease = NULL;		
+	struct dhcpOfferedAddr *lease = NULL;
 
 	addr = ntohl(server_config.start); /* addr is in host order here */
 	for (;addr <= ntohl(server_config.end); addr++) {

libbb_udhcp.h

@@ -4,7 +4,7 @@
  * (for busybox) */
 
 #ifdef CONFIG_INSTALL_NO_USR
-#undef DEFUALT_SCRIPT
+#undef DEFAULT_SCRIPT
 #define DEFAULT_SCRIPT  "/share/udhcpc/default.script"
 #endif
 

options.c

@@ -1,8 +1,8 @@
-/* 
- * options.c -- DHCP server option packet tools 
+/*
+ * options.c -- DHCP server option packet tools
  * Rewrite by Russ Dill <Russ.Dill@asu.edu> July 2001
  */
- 
+
 #include <stdlib.h>
 #include <string.h>
 
@@ -64,7 +64,7 @@ uint8_t *get_option(struct dhcpMessage *packet, int code)
 	int i, length;
 	uint8_t *optionptr;
 	int over = 0, done = 0, curr = OPTION_FIELD;
-	
+
 	optionptr = packet->options;
 	i = 0;
 	length = 308;
@@ -79,7 +79,7 @@ uint8_t *get_option(struct dhcpMessage *packet, int code)
 				return NULL;
 			}
 			return optionptr + i + 2;
-		}			
+		}
 		switch (optionptr[i + OPT_CODE]) {
 		case DHCP_PADDING:
 			i++;
@@ -114,10 +114,10 @@ uint8_t *get_option(struct dhcpMessage *packet, int code)
 
 
 /* return the position of the 'end' option (no bounds checking) */
-int end_option(uint8_t *optionptr) 
+int end_option(uint8_t *optionptr)
 {
 	int i = 0;
-	
+
 	while (optionptr[i] != DHCP_END) {
 		if (optionptr[i] == DHCP_PADDING) i++;
 		else i += optionptr[i + OPT_LEN] + 2;
@@ -131,7 +131,7 @@ int end_option(uint8_t *optionptr)
 int add_option_string(uint8_t *optionptr, uint8_t *string)
 {
 	int end = end_option(optionptr);
-	
+
 	/* end position + string length + option code/length + end option */
 	if (end + string[OPT_LEN] + 2 + 1 >= 308) {
 		LOG(LOG_ERR, "Option 0x%02x did not fit into the packet!", string[OPT_CODE]);
@@ -162,12 +162,12 @@ int add_simple_option(uint8_t *optionptr, uint8_t code, uint32_t data)
 		if (dhcp_options[i].code == code) {
 			length = option_lengths[dhcp_options[i].flags & TYPE_MASK];
 		}
-		
+
 	if (!length) {
 		DEBUG(LOG_ERR, "Could not add option 0x%02x", code);
 		return 0;
 	}
-	
+
 	option[OPT_CODE] = code;
 	option[OPT_LEN] = length;
 
@@ -202,7 +202,7 @@ void attach_option(struct option_set **opt_list, struct dhcp_option *option, cha
 		DEBUG(LOG_INFO, "Attaching option %s to existing member of list", option->name);
 		if (option->flags & OPTION_LIST) {
 			if (existing->data[OPT_LEN] + length <= 255) {
-				existing->data = realloc(existing->data, 
+				existing->data = realloc(existing->data,
 						existing->data[OPT_LEN] + length + 2);
 				memcpy(existing->data + existing->data[OPT_LEN] + 2, buffer, length);
 				existing->data[OPT_LEN] += length;
@@ -210,19 +210,19 @@ void attach_option(struct option_set **opt_list, struct dhcp_option *option, cha
 		} /* else, ignore the new data */
 	} else {
 		DEBUG(LOG_INFO, "Attaching option %s to list", option->name);
-		
+
 		/* make a new option */
 		new = xmalloc(sizeof(struct option_set));
 		new->data = xmalloc(length + 2);
 		new->data[OPT_CODE] = option->code;
 		new->data[OPT_LEN] = length;
 		memcpy(new->data + 2, buffer, length);
-		
+
 		curr = opt_list;
 		while (*curr && (*curr)->data[OPT_CODE] < option->code)
 			curr = &(*curr)->next;
-			
+
 		new->next = *curr;
-		*curr = new;		
+		*curr = new;
 	}
 }

packet.c

@@ -66,7 +66,7 @@ int get_packet(struct dhcpMessage *packet, int fd)
 		return -2;
 	}
 	DEBUG(LOG_INFO, "Received a packet");
-	
+
 	if (packet->op == BOOTREQUEST && (vendor = get_option(packet, DHCP_VENDOR))) {
 		for (i = 0; broken_vendors[i][0]; i++) {
 			if (vendor[OPT_LEN - 2] == (uint8_t) strlen(broken_vendors[i]) &&
@@ -77,7 +77,7 @@ int get_packet(struct dhcpMessage *packet, int fd)
 			}
 		}
 	}
-			    	
+			
 
 	return bytes;
 }
@@ -126,10 +126,10 @@ int raw_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_port,
 		DEBUG(LOG_ERR, "socket call failed: %m");
 		return -1;
 	}
-	
+
 	memset(&dest, 0, sizeof(dest));
 	memset(&packet, 0, sizeof(packet));
-	
+
 	dest.sll_family = AF_PACKET;
 	dest.sll_protocol = htons(ETH_P_IP);
 	dest.sll_ifindex = ifindex;
@@ -150,7 +150,7 @@ int raw_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_port,
 	packet.ip.tot_len = packet.udp.len;
 	memcpy(&(packet.data), payload, sizeof(struct dhcpMessage));
 	packet.udp.check = checksum(&packet, sizeof(struct udp_dhcp_packet));
-	
+
 	packet.ip.tot_len = htons(sizeof(struct udp_dhcp_packet));
 	packet.ip.ihl = sizeof(packet.ip) >> 2;
 	packet.ip.version = IPVERSION;
@@ -173,10 +173,10 @@ int kernel_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_po
 	int n = 1;
 	int fd, result;
 	struct sockaddr_in client;
-	
+
 	if ((fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
 		return -1;
-	
+
 	if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &n, sizeof(n)) == -1)
 		return -1;
 
@@ -191,7 +191,7 @@ int kernel_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_po
 	memset(&client, 0, sizeof(client));
 	client.sin_family = AF_INET;
 	client.sin_port = htons(dest_port);
-	client.sin_addr.s_addr = dest_ip; 
+	client.sin_addr.s_addr = dest_ip;
 
 	if (connect(fd, (struct sockaddr *)&client, sizeof(struct sockaddr)) == -1)
 		return -1;
@@ -199,4 +199,4 @@ int kernel_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_po
 	result = write(fd, payload, sizeof(struct dhcpMessage));
 	close(fd);
 	return result;
-}	
+}

packet.h

@@ -20,7 +20,7 @@ struct dhcpMessage {
 	uint8_t sname[64];
 	uint8_t file[128];
 	uint32_t cookie;
-	uint8_t options[308]; /* 312 - cookie */ 
+	uint8_t options[308]; /* 312 - cookie */
 };
 
 struct udp_dhcp_packet {

script.c

@@ -1,6 +1,6 @@
 /* script.c
  *
- * Functions to call the DHCP client notification scripts 
+ * Functions to call the DHCP client notification scripts
  *
  * Russ Dill <Russ.Dill@asu.edu> July 2001
  *
@@ -157,7 +157,7 @@ static char **fill_envp(struct dhcpMessage *packet)
 		if (!(over & FILE_FIELD) && packet->file[0]) num_options++;
 		if (!(over & SNAME_FIELD) && packet->sname[0]) num_options++;
 	}
-	
+
 	envp = xcalloc(sizeof(char *), num_options + 5);
 	j = 0;
 	asprintf(&envp[j++], "interface=%s", client_config.interface);
@@ -223,11 +223,11 @@ void run_script(struct dhcpMessage *packet, const char *name)
 		return;
 	} else if (pid == 0) {
 		/* close fd's? */
-		
+
 		/* exec script */
 		execle(client_config.script, client_config.script,
 		       name, NULL, envp);
 		LOG(LOG_ERR, "script %s failed: %m", client_config.script);
 		exit(1);
-	}			
+	}
 }

serverpacket.c

@@ -45,7 +45,7 @@ static int send_packet_to_client(struct dhcpMessage *payload, int force_broadcas
 {
 	uint8_t *chaddr;
 	uint32_t ciaddr;
-	
+
 	if (force_broadcast) {
 		DEBUG(LOG_INFO, "broadcasting packet to client (NAK)");
 		ciaddr = INADDR_BROADCAST;
@@ -63,7 +63,7 @@ static int send_packet_to_client(struct dhcpMessage *payload, int force_broadcas
 		ciaddr = payload->yiaddr;
 		chaddr = payload->chaddr;
 	}
-	return raw_packet(payload, server_config.server, SERVER_PORT, 
+	return raw_packet(payload, server_config.server, SERVER_PORT,
 			ciaddr, CLIENT_PORT, chaddr, server_config.ifindex);
 }
 
@@ -101,7 +101,7 @@ static void add_bootp_options(struct dhcpMessage *packet)
 	if (server_config.boot_file)
 		strncpy(packet->file, server_config.boot_file, sizeof(packet->file) - 1);
 }
-	
+
 
 /* send a DHCP OFFER to a DHCP DISCOVER */
 int sendOffer(struct dhcpMessage *oldpacket)
@@ -114,14 +114,14 @@ int sendOffer(struct dhcpMessage *oldpacket)
 	struct in_addr addr;
 
 	init_packet(&packet, oldpacket, DHCPOFFER);
-	
+
 	/* ADDME: if static, short circuit */
 	/* the client is in our lease/offered table */
 	if ((lease = find_lease_by_chaddr(oldpacket->chaddr))) {
-		if (!lease_expired(lease)) 
+		if (!lease_expired(lease))
 			lease_time_align = lease->expires - time(0);
 		packet.yiaddr = lease->yiaddr;
-		
+
 	/* Or the client has a requested ip */
 	} else if ((req = get_option(oldpacket, DHCP_REQUESTED_IP)) &&
 
@@ -131,10 +131,10 @@ int sendOffer(struct dhcpMessage *oldpacket)
 		   /* and the ip is in the lease range */
 		   ntohl(req_align) >= ntohl(server_config.start) &&
 		   ntohl(req_align) <= ntohl(server_config.end) &&
-		   
+		
 		   /* and its not already taken/offered */ /* ADDME: check that its not a static lease */
 		   ((!(lease = find_lease_by_yiaddr(req_align)) ||
-		   
+		
 		   /* or its taken, but expired */ /* ADDME: or maybe in here */
 		   lease_expired(lease)))) {
 				packet.yiaddr = req_align; /* FIXME: oh my, is there a host using this IP? */
@@ -142,32 +142,32 @@ int sendOffer(struct dhcpMessage *oldpacket)
 	/* otherwise, find a free IP */ /*ADDME: is it a static lease? */
 	} else {
 		packet.yiaddr = find_address(0);
-		
+
 		/* try for an expired lease */
 		if (!packet.yiaddr) packet.yiaddr = find_address(1);
 	}
-	
+
 	if(!packet.yiaddr) {
 		LOG(LOG_WARNING, "no IP addresses to give -- OFFER abandoned");
 		return -1;
 	}
-	
+
 	if (!add_lease(packet.chaddr, packet.yiaddr, server_config.offer_time)) {
 		LOG(LOG_WARNING, "lease pool is full -- OFFER abandoned");
 		return -1;
-	}		
+	}
 
 	if ((lease_time = get_option(oldpacket, DHCP_LEASE_TIME))) {
 		memcpy(&lease_time_align, lease_time, 4);
 		lease_time_align = ntohl(lease_time_align);
-		if (lease_time_align > server_config.lease) 
+		if (lease_time_align > server_config.lease)
 			lease_time_align = server_config.lease;
 	}
 
 	/* Make sure we aren't just using the lease time from the previous offer */
-	if (lease_time_align < server_config.min_lease) 
+	if (lease_time_align < server_config.min_lease)
 		lease_time_align = server_config.lease;
-	/* ADDME: end of short circuit */		
+	/* ADDME: end of short circuit */
 	add_simple_option(packet.options, DHCP_LEASE_TIME, htonl(lease_time_align));
 
 	curr = server_config.options;
@@ -178,7 +178,7 @@ int sendOffer(struct dhcpMessage *oldpacket)
 	}
 
 	add_bootp_options(&packet);
-	
+
 	addr.s_addr = packet.yiaddr;
 	LOG(LOG_INFO, "sending OFFER of %s", inet_ntoa(addr));
 	return send_packet(&packet, 0);
@@ -190,7 +190,7 @@ int sendNAK(struct dhcpMessage *oldpacket)
 	struct dhcpMessage packet;
 
 	init_packet(&packet, oldpacket, DHCPNAK);
-	
+
 	DEBUG(LOG_INFO, "sending NAK");
 	return send_packet(&packet, 1);
 }
@@ -206,18 +206,18 @@ int sendACK(struct dhcpMessage *oldpacket, uint32_t yiaddr)
 
 	init_packet(&packet, oldpacket, DHCPACK);
 	packet.yiaddr = yiaddr;
-	
+
 	if ((lease_time = get_option(oldpacket, DHCP_LEASE_TIME))) {
 		memcpy(&lease_time_align, lease_time, 4);
 		lease_time_align = ntohl(lease_time_align);
-		if (lease_time_align > server_config.lease) 
+		if (lease_time_align > server_config.lease)
 			lease_time_align = server_config.lease;
-		else if (lease_time_align < server_config.min_lease) 
+		else if (lease_time_align < server_config.min_lease)
 			lease_time_align = server_config.lease;
 	}
-	
+
 	add_simple_option(packet.options, DHCP_LEASE_TIME, htonl(lease_time_align));
-	
+
 	curr = server_config.options;
 	while (curr) {
 		if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
@@ -230,7 +230,7 @@ int sendACK(struct dhcpMessage *oldpacket, uint32_t yiaddr)
 	addr.s_addr = packet.yiaddr;
 	LOG(LOG_INFO, "sending ACK to %s", inet_ntoa(addr));
 
-	if (send_packet(&packet, 0) < 0) 
+	if (send_packet(&packet, 0) < 0)
 		return -1;
 
 	add_lease(packet.chaddr, packet.yiaddr, lease_time_align);
@@ -245,7 +245,7 @@ int send_inform(struct dhcpMessage *oldpacket)
 	struct option_set *curr;
 
 	init_packet(&packet, oldpacket, DHCPACK);
-	
+
 	curr = server_config.options;
 	while (curr) {
 		if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)

socket.c

@@ -55,7 +55,7 @@ int read_interface(char *interface, int *ifindex, uint32_t *addr, uint8_t *arp)
 		ifr.ifr_addr.sa_family = AF_INET;
 		strcpy(ifr.ifr_name, interface);
 
-		if (addr) { 
+		if (addr) {
 			if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
 				our_ip = (struct sockaddr_in *) &ifr.ifr_addr;
 				*addr = our_ip->sin_addr.s_addr;
@@ -65,7 +65,7 @@ int read_interface(char *interface, int *ifindex, uint32_t *addr, uint8_t *arp)
 				return -1;
 			}
 		}
-		
+
 		if (ioctl(fd, SIOCGIFINDEX, &ifr) == 0) {
 			DEBUG(LOG_INFO, "adapter index %d", ifr.ifr_ifindex);
 			*ifindex = ifr.ifr_ifindex;
@@ -102,7 +102,7 @@ int listen_socket(uint32_t ip, int port, char *inf)
 		DEBUG(LOG_ERR, "socket call failed: %m");
 		return -1;
 	}
-	
+
 	memset(&addr, 0, sizeof(addr));
 	addr.sin_family = AF_INET;
 	addr.sin_port = htons(port);
@@ -127,6 +127,6 @@ int listen_socket(uint32_t ip, int port, char *inf)
 		close(fd);
 		return -1;
 	}
-	
+
 	return fd;
 }