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-rw-r--r--lib/sendto.c17
1 files changed, 13 insertions, 4 deletions
diff --git a/lib/sendto.c b/lib/sendto.c
index fb2231336..b709299a7 100644
--- a/lib/sendto.c
+++ b/lib/sendto.c
@@ -33,9 +33,18 @@ rpl_sendto (int fd, const void *buf, size_t len, int flags,
const struct sockaddr *to, socklen_t tolen)
{
SOCKET sock = FD_TO_SOCKET (fd);
- int r = sendto (sock, buf, len, flags, to, tolen);
- if (r < 0)
- set_winsock_errno ();
- return r;
+ if (sock == INVALID_SOCKET)
+ {
+ errno = EBADF;
+ return -1;
+ }
+ else
+ {
+ int r = sendto (sock, buf, len, flags, to, tolen);
+ if (r < 0)
+ set_winsock_errno ();
+
+ return r;
+ }
}