Fixed UDPLite receive: checksum was calculated wrong if checksum coverage != tot_len

CHANGELOG

@@ -424,13 +424,14 @@ HISTORY
 
   ++ Bug fixes:
 
+  2007-10-09 Simon Goldschmidt
+  * udp.c, inet.c, inet.h: Fixed UDPLite: send: Checksum was always generated too
+    short and also was generated wrong if checksum coverage != tot_len;
+    receive: checksum was calculated wrong if checksum coverage != tot_len
+
   2007-10-08 Simon Goldschmidt
   * mem.c: lfree was not updated in mem_realloc!
 
-  2007-10-07 Simon Goldschmidt
-  * udp.c, inet.c, inet.h: Fixed UDPLite SENDING: Checksum was always generated
-    too short and also was generated wrong if checksum coverage != tot_len.
-
   2007-10-07 Frédéric Bernon
   * sockets.c, api.h, api_lib.c: First step to fix "bug #20900 : Potential
     crash error problem with netconn_peer & netconn_addr". VERY IMPORTANT:

src/core/udp.c

@@ -205,9 +205,9 @@ udp_input(struct pbuf *p, struct netif *inp)
           goto end;
         }
       }
-      if (inet_chksum_pseudo(p, (struct ip_addr *)&(iphdr->src),
+      if (inet_chksum_pseudo_partial(p, (struct ip_addr *)&(iphdr->src),
                              (struct ip_addr *)&(iphdr->dest),
-                             IP_PROTO_UDPLITE, chklen) != 0) {
+                             IP_PROTO_UDPLITE, p->tot_len, chklen) != 0) {
         LWIP_DEBUGF(UDP_DEBUG | 2,
                     ("udp_input: UDP Lite datagram discarded due to failing checksum\n"));
         UDP_STATS_INC(udp.chkerr);