diff --git a/case.h b/case.h
index a46b346..e2f164a 100644
--- a/case.h
+++ b/case.h
@@ -4,12 +4,12 @@
 /* turn upper case letters to lower case letters, ASCIIZ */
 extern void case_lowers(char *s);
 /* turn upper case letters to lower case letters, binary */
-extern void case_lowerb(char *buf,unsigned long len);
+extern void case_lowerb(void *buf,unsigned long len);
 
 /* like str_diff, ignoring case */
 extern int case_diffs(const char *,const char *);
 /* like byte_diff, ignoring case */
-extern int case_diffb(const char *,unsigned long,const char *);
+extern int case_diffb(const void *,unsigned long,const void *);
 
 /* like str_start, ignoring case */
 extern int case_starts(const char *,const char *);
diff --git a/case/case_diffb.3 b/case/case_diffb.3
index 35db5de..826fa45 100644
--- a/case/case_diffb.3
+++ b/case/case_diffb.3
@@ -4,7 +4,7 @@ case_diffb \- compare strings case-insensitively
 .SH SYNTAX
 .B #include <case.h>
 
-int \fBcase_diffb\fP(const char* \fIa\fR,unsigned long \fIlen\fR,const char* \fIb\fR);
+int \fBcase_diffb\fP(const void* \fIa\fR,unsigned long \fIlen\fR,const void* \fIb\fR);
 .SH DESCRIPTION
 case_diffb is similar to byte_diff.  The difference is that for the
 comparison 'A' == 'a', 'B' == 'b', ..., 'Z' == 'z'.
diff --git a/case/case_diffb.c b/case/case_diffb.c
index cede832..569ba8e 100644
--- a/case/case_diffb.c
+++ b/case/case_diffb.c
@@ -1,9 +1,11 @@
 #include "case.h"
 
-int case_diffb(register const char *s,register unsigned long len,register const char *t)
+int case_diffb(register const void* S,register unsigned long len,register const void* T)
 {
   register unsigned char x;
   register unsigned char y;
+  register const char* s=(const char*)S;
+  register const char* t=(const char*)T;
 
   while (len > 0) {
     --len;
diff --git a/case/case_lowerb.3 b/case/case_lowerb.3
index e91c0eb..2363fc6 100644
--- a/case/case_lowerb.3
+++ b/case/case_lowerb.3
@@ -4,7 +4,7 @@ case_lowerb \- compare strings case-insensitively
 .SH SYNTAX
 .B #include <case.h>
 
-void \fBcase_lowerb\fP(char* \fIs\fR,unsigned long \fIlen\fR);
+void \fBcase_lowerb\fP(void* \fIs\fR,unsigned long \fIlen\fR);
 .SH DESCRIPTION
 case_lowerb converts each 'A' to 'a', 'B' to 'b', ..., 'Z' to 'z' in
 \fIs\fR[0], \fIs\fR[1], ..., \fIs\fR[\fIlen\fR].
diff --git a/case/case_lowerb.c b/case/case_lowerb.c
index b8fd416..c7461ec 100644
--- a/case/case_lowerb.c
+++ b/case/case_lowerb.c
@@ -1,6 +1,7 @@
 #include "case.h"
 
-void case_lowerb(char *s,unsigned long len) {
+void case_lowerb(void *S,unsigned long len) {
+  char* s=(char*)S;
   unsigned char x;
   while (len > 0) {
     --len;
diff --git a/test/dllink.c b/test/dllink.c
index b14e915..8bf4ed3 100644
--- a/test/dllink.c
+++ b/test/dllink.c
@@ -4,6 +4,7 @@
 #include "buffer.h"
 #include <unistd.h>
 #include <stdio.h>
+#include "case.h"
 
 main(int argc,char* argv[]) {
   int s=socket_tcp4();
@@ -22,7 +23,13 @@ main(int argc,char* argv[]) {
     perror("connect");
     return 1;
   }
-  strcpy(buf,"dllink "); strcat(buf,argv[1]); strcat(buf,"\nq\n");
+  strcpy(buf,"dllink ");
+  if (case_equalb(argv[1],6,"ed2k:|")) {
+    strcat(buf,"ed2k://");
+    strcat(buf,argv[1]+5);
+  } else
+    strcat(buf,argv[1]);
+  strcat(buf,"\nq\n");
   write(s,buf,strlen(buf));
   for (;;) {
     line[0]=0;