Avoid multiple definitions of `struct tcphdr`.
No-one's hit this in practice, that I know of, but there are very few
instances of this old workaround for kernel/userspace mismatches still
present, and (as part of the much harder and less effective `struct
sigaction` cleanup), we should just remove them.
Bug: http://b/236042740
Test: treehugger
Change-Id: I6c71d4353044cf57cfa8a9796a4c3d6a4d51cd86
diff --git a/libc/include/bits/tcphdr.h b/libc/include/bits/tcphdr.h
new file mode 100644
index 0000000..a9b6fe0
--- /dev/null
+++ b/libc/include/bits/tcphdr.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <sys/cdefs.h>
+#include <stdint.h>
+
+__BEGIN_DECLS
+
+struct tcphdr {
+ __extension__ union {
+ struct {
+ uint16_t th_sport;
+ uint16_t th_dport;
+ uint32_t th_seq;
+ uint32_t th_ack;
+ uint8_t th_x2:4;
+ uint8_t th_off:4;
+ uint8_t th_flags;
+ uint16_t th_win;
+ uint16_t th_sum;
+ uint16_t th_urp;
+ };
+ struct {
+ uint16_t source;
+ uint16_t dest;
+ uint32_t seq;
+ uint32_t ack_seq;
+ uint16_t res1:4;
+ uint16_t doff:4;
+ uint16_t fin:1;
+ uint16_t syn:1;
+ uint16_t rst:1;
+ uint16_t psh:1;
+ uint16_t ack:1;
+ uint16_t urg:1;
+ uint16_t res2:2;
+ uint16_t window;
+ uint16_t check;
+ uint16_t urg_ptr;
+ };
+ };
+};
+
+__END_DECLS