--- linksys-tftp-1.2.1/tftp.c	2024-04-16 08:27:50.328449885 -0700
+++ linksys-tftp-1.2.1/tftp.c	2024-04-15 21:26:36.259371211 -0700
@@ -47,6 +47,13 @@ extern  int     rexmtval;
 extern  int     maxtimeout;
 extern	int	segsize;
 
+/* functions from tftpsubs */
+extern int readit(FILE *file,  struct tftphdr **dpp, int convert);
+extern int read_ahead(FILE *file, int convert);
+extern int writeit(FILE *file, struct tftphdr **dpp, int ct, int convert);
+extern int write_behind( FILE *file, int convert);
+extern int synchnet(int f);
+
 #define PKTSIZE    (1432+4) /* SEGSIZE+4 */
 char    ackbuf[PKTSIZE];
 int	timeout;
@@ -57,6 +64,19 @@ jmp_buf	timeoutbuf;
 #define OACK	6
 #endif
 
+/* functions declared herein */
+void timer(int sig);
+void parseoack(char *cp, int sz);
+void sendfile(int fd, char *name, char *mode, char *linkpass);
+void recvfile(int fd, char *name, char *mode, char *linkpass);
+int makerequest(int request, char *name, struct tftphdr *tp, char *mode, char *linkpass);
+void nak(int error);
+void topts(char *cp, int sz);
+void tpacket(char *s, struct tftphdr *tp, int n);
+void startclock();
+void stopclock();
+void printstats(char *direction, unsigned long amount);
+
 void timer(int sig)
 {
 
@@ -72,9 +92,7 @@ void timer(int sig)
 /*
  * Parse an OACK package and set blocksize accordingly
  */
-parseoack(cp, sz)
-	char *cp;
-	int sz;
+void parseoack(char *cp, int sz)
 {
 	int n;
 	
@@ -106,11 +124,7 @@ parseoack(cp, sz)
 /*
  * Send the requested file.
  */
-sendfile(fd, name, mode, linkpass)
-	int fd;
-	char *name;
-	char *mode;
-	char *linkpass;
+void sendfile(int fd, char *name, char *mode, char *linkpass)
 {
 	register struct tftphdr *ap;       /* data and ack packets */
 	struct tftphdr *r_init(), *dp;
@@ -211,7 +225,7 @@ send_data:
 					printf("protocol violation\n");
 					longjmp(toplevel, -1);
 				}
-				parseoack(&ap->th_stuff, n - 2);
+                                parseoack(ap->th_stuff, n - 2);
 				break;
 			}
 		}
@@ -231,11 +245,7 @@ abort:
 /*
  * Receive a file.
  */
-recvfile(fd, name, mode, linkpass)
-	int fd;
-	char *name;
-	char *mode;
-	char *linkpass;
+void recvfile(int fd, char *name, char *mode, char *linkpass)
 {
 	register struct tftphdr *ap;
 	struct tftphdr *dp, *w_init();
@@ -336,7 +346,7 @@ send_ack:
 					longjmp(toplevel, -1);
 				}
 				waitforoack = 0;
-				parseoack(&dp->th_stuff, n - 2);
+                                parseoack(dp->th_stuff, n - 2);
 				ap->th_opcode = htons((u_short)ACK);
 				ap->th_block = htons(0);
 				size = 4;
@@ -362,10 +372,7 @@ abort:
 		printstats("Received", amount);
 }
 
-makerequest(request, name, tp, mode, linkpass)
-	int request;
-	char *name, *mode, *linkpass;
-	struct tftphdr *tp;
+int makerequest(int request, char *name, struct tftphdr *tp, char *mode, char *linkpass)
 {
 	register char *cp;
 
@@ -404,8 +411,7 @@ struct errmsg {
  * standard TFTP codes, or a UNIX errno
  * offset by 100.
  */
-nak(error)
-	int error;
+void nak(int error)
 {
 	register struct tftphdr *tp;
 	int length;
@@ -431,9 +437,7 @@ nak(error)
 		perror("nak");
 }
 
-topts(cp, sz)
-	char *cp;
-	int sz;
+void topts(char *cp, int sz)
 {
 	int n, i = 0;
 	
@@ -454,10 +458,7 @@ topts(cp, sz)
 	}
 }
 
-tpacket(s, tp, n)
-	char *s;
-	struct tftphdr *tp;
-	int n;
+void tpacket(char *s, struct tftphdr *tp, int n)
 {
 	static char *opcodes[] =
 	   { "#0", "RRQ", "WRQ", "DATA", "ACK", "ERROR", "OACK" };
@@ -505,17 +506,15 @@ struct timeval tstart;
 struct timeval tstop;
 struct timezone zone;
 
-startclock() {
+void startclock() {
 	gettimeofday(&tstart, &zone);
 }
 
-stopclock() {
+void stopclock() {
 	gettimeofday(&tstop, &zone);
 }
 
-printstats(direction, amount)
-char *direction;
-unsigned long amount;
+void printstats(char *direction, unsigned long amount)
 {
 	double delta;
 			/* compute delta in 1/10's second units */