Update <arpa/*> from FreeBSD.
We've had <arpa/telnet.h> for years, despite being slightly more useless
than <arpa/ftp.h> and <arpa/tftp.h>. The inetutils package expects these
to be available.
Bug: http://b/63145226
Test: builds
Change-Id: I1e3c7421779e965b3342d681fefb8dc2561b604d
diff --git a/libc/include/arpa/tftp.h b/libc/include/arpa/tftp.h
new file mode 100644
index 0000000..20733ec
--- /dev/null
+++ b/libc/include/arpa/tftp.h
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 1983, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ *
+ * @(#)tftp.h 8.1 (Berkeley) 6/2/93
+ * $FreeBSD$
+ */
+
+#ifndef _ARPA_TFTP_H_
+#define _ARPA_TFTP_H_
+
+#include <sys/cdefs.h>
+
+/*
+ * Trivial File Transfer Protocol (IEN-133)
+ */
+#define SEGSIZE 512 /* data segment size */
+
+/*
+ * Packet types.
+ */
+#define RRQ 01 /* read request */
+#define WRQ 02 /* write request */
+#define DATA 03 /* data packet */
+#define ACK 04 /* acknowledgement */
+#define ERROR 05 /* error code */
+#define OACK 06 /* option acknowledgement */
+
+struct tftphdr {
+ unsigned short th_opcode; /* packet type */
+ union {
+ unsigned short tu_block; /* block # */
+ unsigned short tu_code; /* error code */
+ char tu_stuff[1]; /* request packet stuff */
+ } __packed th_u;
+ char th_data[1]; /* data or error string */
+} __packed;
+
+#define th_block th_u.tu_block
+#define th_code th_u.tu_code
+#define th_stuff th_u.tu_stuff
+#define th_msg th_data
+
+/*
+ * Error codes.
+ */
+#define EUNDEF 0 /* not defined */
+#define ENOTFOUND 1 /* file not found */
+#define EACCESS 2 /* access violation */
+#define ENOSPACE 3 /* disk full or allocation exceeded */
+#define EBADOP 4 /* illegal TFTP operation */
+#define EBADID 5 /* unknown transfer ID */
+#define EEXISTS 6 /* file already exists */
+#define ENOUSER 7 /* no such user */
+#define EOPTNEG 8 /* option negotiation failed */
+
+#endif /* !_TFTP_H_ */