D24059.id69488.diff
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	Index: head/lib/libc/sys/sendfile.2
	===================================================================
	--- head/lib/libc/sys/sendfile.2
	+++ head/lib/libc/sys/sendfile.2
	@@ -431,3 +431,12 @@
	.Er EFAULT ,
	if provided an invalid address for
	.Fa sbytes .
	+The
	+.Fn sendfile
	+system call does not support SCTP sockets,
	+it will return
	+.Dv -1
	+and set
	+.Va errno
	+to
	+.Er EINVAL.
	Index: head/sys/kern/kern_sendfile.c
	===================================================================
	--- head/sys/kern/kern_sendfile.c
	+++ head/sys/kern/kern_sendfile.c
	@@ -575,6 +575,12 @@
	so = (sock_fp)->f_data;
	if ((*so)->so_type != SOCK_STREAM)
	return (EINVAL);
	+ /*
	+ * SCTP one-to-one style sockets currently don't work with
	+ * sendfile(). So indicate EINVAL for now.
	+ */
	+ if ((*so)->so_proto->pr_protocol == IPPROTO_SCTP)
	+ return (EINVAL);
	if (SOLISTENING(*so))
	return (ENOTCONN);
	return (0);