3 files changed, 10 insertions, 5 deletions

diff --git a/src/buffer.c b/src/buffer.c
index a696158..dbd5d2c 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -81,10 +81,10 @@ int buf_meth_send(lua_State *L, p_buf buf) {
     const char *data = luaL_checklstring(L, 2, &size);
     long start = (long) luaL_optnumber(L, 3, 1);
     long end = (long) luaL_optnumber(L, 4, -1);
-    if (start < 0) start = size+start+1;
-    if (end < 0) end = size+end+1;
-    if (start < 1) start = 1;
-    if (end > (long) size) end = size;
+    if (start < 0) start = (long) (size+start+1);
+    if (end < 0) end = (long) (size+end+1);
+    if (start < 1) start = (long) 1;
+    if (end > (long) size) end = (long) size;
     if (start <= end) err = sendraw(buf, data+start-1, end-start+1, &sent);
     /* check if there was an error */
     if (err != IO_DONE) {
diff --git a/src/udp.h b/src/udp.h
index f34c8ad..520573d 100644
--- a/src/udp.h
+++ b/src/udp.h
@@ -19,6 +19,7 @@
 #include "timeout.h"
 #include "socket.h"
 
+/* can't be larger than wsocket.c MAXCHUNK!!! */
 #define UDP_DATAGRAMSIZE 8192
 
 typedef struct t_udp_ {
diff --git a/src/wsocket.c b/src/wsocket.c
index 1f1e99d..1b169ed 100644
--- a/src/wsocket.c
+++ b/src/wsocket.c
@@ -181,6 +181,8 @@ int sock_accept(p_sock ps, p_sock pa, SA *addr, socklen_t *len, p_tm tm) {
 /*-------------------------------------------------------------------------*\
 * Send with timeout
 \*-------------------------------------------------------------------------*/
+/* has to be larger than UDP_DATAGRAMSIZE !!!*/
+#define MAXCHUNK (64*1024)
 int sock_send(p_sock ps, const char *data, size_t count, size_t *sent, p_tm tm)
 {
     int err;
@@ -190,7 +192,9 @@ int sock_send(p_sock ps, const char *data, size_t count, size_t *sent, p_tm tm)
     *sent = 0;
     for ( ;; ) {
         /* try to send something */
-        int put = send(*ps, data, (int) count, 0);
+                /* on windows, if you try to send 10MB, the OS will buffer EVERYTHING 
+                 * this can take an awful lot of time and we will end up blocked. */
+                int put = send(*ps, data, (count < MAXCHUNK)? (int)count: MAXCHUNK, 0);
         /* if we sent something, we are done */
         if (put > 0) {
             *sent = put;