Put ssh back into the repository
Change-Id: I23324372188fa6ed3f93a32b84365f5df6367590
diff --git a/packet.h b/packet.h
new file mode 100644
index 0000000..90eec17
--- /dev/null
+++ b/packet.h
@@ -0,0 +1,127 @@
+/* $OpenBSD: packet.h,v 1.56 2011/05/06 21:14:05 djm Exp $ */
+
+/*
+ * Author: Tatu Ylonen <ylo@cs.hut.fi>
+ * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+ * All rights reserved
+ * Interface for the packet protocol functions.
+ *
+ * As far as I am concerned, the code I have written for this software
+ * can be used freely for any purpose. Any derived versions of this
+ * software must be clearly marked as such, and if the derived work is
+ * incompatible with the protocol description in the RFC file, it must be
+ * called by a name other than "ssh" or "Secure Shell".
+ */
+
+#ifndef PACKET_H
+#define PACKET_H
+
+#include <termios.h>
+
+#include <openssl/bn.h>
+#ifdef OPENSSL_HAS_ECC
+#include <openssl/ec.h>
+#endif
+
+void packet_set_connection(int, int);
+void packet_set_timeout(int, int);
+void packet_set_nonblocking(void);
+int packet_get_connection_in(void);
+int packet_get_connection_out(void);
+void packet_close(void);
+void packet_set_encryption_key(const u_char *, u_int, int);
+u_int packet_get_encryption_key(u_char *);
+void packet_set_protocol_flags(u_int);
+u_int packet_get_protocol_flags(void);
+void packet_start_compression(int);
+void packet_set_interactive(int, int, int);
+int packet_is_interactive(void);
+void packet_set_server(void);
+void packet_set_authenticated(void);
+
+void packet_start(u_char);
+void packet_put_char(int ch);
+void packet_put_int(u_int value);
+void packet_put_int64(u_int64_t value);
+void packet_put_bignum(BIGNUM * value);
+void packet_put_bignum2(BIGNUM * value);
+#ifdef OPENSSL_HAS_ECC
+void packet_put_ecpoint(const EC_GROUP *, const EC_POINT *);
+#endif
+void packet_put_string(const void *buf, u_int len);
+void packet_put_cstring(const char *str);
+void packet_put_raw(const void *buf, u_int len);
+void packet_send(void);
+
+int packet_read(void);
+void packet_read_expect(int type);
+int packet_read_poll(void);
+void packet_process_incoming(const char *buf, u_int len);
+int packet_read_seqnr(u_int32_t *seqnr_p);
+int packet_read_poll_seqnr(u_int32_t *seqnr_p);
+
+u_int packet_get_char(void);
+u_int packet_get_int(void);
+u_int64_t packet_get_int64(void);
+void packet_get_bignum(BIGNUM * value);
+void packet_get_bignum2(BIGNUM * value);
+#ifdef OPENSSL_HAS_ECC
+void packet_get_ecpoint(const EC_GROUP *, EC_POINT *);
+#endif
+void *packet_get_raw(u_int *length_ptr);
+void *packet_get_string(u_int *length_ptr);
+char *packet_get_cstring(u_int *length_ptr);
+void *packet_get_string_ptr(u_int *length_ptr);
+void packet_disconnect(const char *fmt,...) __attribute__((format(printf, 1, 2)));
+void packet_send_debug(const char *fmt,...) __attribute__((format(printf, 1, 2)));
+
+void set_newkeys(int mode);
+int packet_get_keyiv_len(int);
+void packet_get_keyiv(int, u_char *, u_int);
+int packet_get_keycontext(int, u_char *);
+void packet_set_keycontext(int, u_char *);
+void packet_get_state(int, u_int32_t *, u_int64_t *, u_int32_t *, u_int64_t *);
+void packet_set_state(int, u_int32_t, u_int64_t, u_int32_t, u_int64_t);
+int packet_get_ssh1_cipher(void);
+void packet_set_iv(int, u_char *);
+void *packet_get_newkeys(int);
+
+void packet_write_poll(void);
+void packet_write_wait(void);
+int packet_have_data_to_write(void);
+int packet_not_very_much_data_to_write(void);
+
+int packet_connection_is_on_socket(void);
+int packet_remaining(void);
+void packet_send_ignore(int);
+void packet_add_padding(u_char);
+
+void tty_make_modes(int, struct termios *);
+void tty_parse_modes(int, int *);
+
+void packet_set_alive_timeouts(int);
+int packet_inc_alive_timeouts(void);
+int packet_set_maxsize(u_int);
+u_int packet_get_maxsize(void);
+
+/* don't allow remaining bytes after the end of the message */
+#define packet_check_eom() \
+do { \
+ int _len = packet_remaining(); \
+ if (_len > 0) { \
+ logit("Packet integrity error (%d bytes remaining) at %s:%d", \
+ _len ,__FILE__, __LINE__); \
+ packet_disconnect("Packet integrity error."); \
+ } \
+} while (0)
+
+int packet_need_rekeying(void);
+void packet_set_rekey_limit(u_int32_t);
+
+void packet_backup_state(void);
+void packet_restore_state(void);
+
+void *packet_get_input(void);
+void *packet_get_output(void);
+
+#endif /* PACKET_H */