[PATCH v3 5/5] ntdll: Compute checksum for ICMP over SOCK_DGRAM IP header.

[Paul Gofman]

From: Paul Gofman

---
 dlls/ntdll/unix/socket.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/dlls/ntdll/unix/socket.c b/dlls/ntdll/unix/socket.c
index 3d43ff1a30a..1b9eb1e33d9 100644
--- a/dlls/ntdll/unix/socket.c
+++ b/dlls/ntdll/unix/socket.c
@@ -711,6 +711,8 @@ static ssize_t fixup_icmp_over_dgram( struct msghdr *hdr, union unix_sockaddr *u
             icmp_h->checksum = chksum( (BYTE *)icmp_h, recv_len - sizeof(ip_h) );
         }
     }
+    ip_h.checksum = 0;
+    ip_h.checksum = chksum( (BYTE *)&ip_h, sizeof(ip_h) );
     memcpy( buf, &ip_h, min( sizeof(ip_h), buf_len ));

return recv_len;