FM / include

/usr/include

Name	Size	Mode	Actions
arpa/	-	0755	rm
asm/	-	0755	rm
asm-generic/	-	0755	rm
bits/	-	0755	rm
bsock/	-	0755	rm
c++/	-	0755	rm
curl/	-	0755	rm
drm/	-	0755	rm
et/	-	0755	rm
finclude/	-	0755	rm
fwctl/	-	0755	rm
gdb/	-	0755	rm
gnu/	-	0755	rm
gssapi/	-	0755	rm
gssrpc/	-	0755	rm
kadm5/	-	0755	rm
krb5/	-	0755	rm
libxml2/	-	0755	rm
linux/	-	0755	rm
lzma/	-	0755	rm
misc/	-	0755	rm
mtd/	-	0755	rm
net/	-	0755	rm
netash/	-	0755	rm
netatalk/	-	0755	rm
netax25/	-	0755	rm
neteconet/	-	0755	rm
netinet/	-	0755	rm
netipx/	-	0755	rm
netiucv/	-	0755	rm
netpacket/	-	0755	rm
netrom/	-	0755	rm
netrose/	-	0755	rm
nfs/	-	0755	rm
nghttp2/	-	0755	rm
offload/	-	0755	rm
openssl/	-	0755	rm
pcp/	-	0755	rm
protocols/	-	0755	rm
python3.9/	-	0755	rm
rdma/	-	0755	rm
rpc/	-	0755	rm
sasl/	-	0755	rm
scsi/	-	0755	rm
selinux/	-	0755	rm
sepol/	-	0755	rm
sound/	-	0755	rm
sys/	-	0755	rm
video/	-	0755	rm
xen/	-	0755	rm
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crypt.h	11160	0644	edit dl rm
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dirent.h	12617	0644	edit dl rm
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fpu_control.h	3584	0644	edit dl rm
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gconv.h	4211	0644	edit dl rm
gelf.h	11406	0644	edit dl rm
GeoIP.h	17835	0644	edit dl rm
GeoIPCity.h	2298	0644	edit dl rm
getopt.h	1469	0644	edit dl rm
glob.h	7299	0644	edit dl rm
gnu-versions.h	2343	0644	edit dl rm
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grp.h	6687	0644	edit dl rm
gshadow.h	4529	0644	edit dl rm
gssapi.h	181	0644	edit dl rm
iconv.h	1858	0644	edit dl rm
idn2.h	13891	0644	edit dl rm
ieee754.h	4916	0644	edit dl rm
ifaddrs.h	2841	0644	edit dl rm
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kdb.h	64333	0644	edit dl rm
keyutils.h	11796	0644	edit dl rm
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krb5.h	402	0644	edit dl rm
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libelf.h	20795	0644	edit dl rm
libgen.h	1386	0644	edit dl rm
libintl.h	4580	0644	edit dl rm
liblsapi-sha1.h	569	0644	edit dl rm
libpsl.h	5792	0644	edit dl rm
libssh2.h	60665	0644	edit dl rm
libssh2_publickey.h	4942	0644	edit dl rm
libssh2_sftp.h	17369	0644	edit dl rm
limits.h	5706	0644	edit dl rm
link.h	7801	0644	edit dl rm
locale.h	7675	0644	edit dl rm
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malloc.h	5912	0644	edit dl rm
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monetary.h	1966	0644	edit dl rm
mqueue.h	4603	0644	edit dl rm
mysql	-	0	edit dl rm
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shadow.h	5472	0644	edit dl rm
signal.h	13040	0644	edit dl rm
slapi-plugin.h	38352	0644	edit dl rm
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uchar.h	2002	0644	edit dl rm
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Edit: /usr/include/libssh2.h (60665B)

/* Copyright (C) Sara Golemon <sarag@libssh2.org>
 * Copyright (C) Daniel Stenberg
 * Copyright (C) Simon Josefsson <simon@josefsson.org>
 * 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.
 *
 *   Neither the name of the copyright holder nor the names
 *   of any other contributors may be used to endorse or
 *   promote products derived from this software without
 *   specific prior written permission.
 *
 * 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.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#ifndef LIBSSH2_H
#define LIBSSH2_H 1

#define LIBSSH2_COPYRIGHT "The libssh2 project and its contributors."

/* We use underscore instead of dash when appending DEV in dev versions just
   to make the BANNER define (used by src/session.c) be a valid SSH
   banner. Release versions have no appended strings and may of course not
   have dashes either. */
#define LIBSSH2_VERSION "1.11.1"

/* The numeric version number is also available "in parts" by using these
   defines: */
#define LIBSSH2_VERSION_MAJOR 1
#define LIBSSH2_VERSION_MINOR 11
#define LIBSSH2_VERSION_PATCH 1

/* This is the numeric version of the libssh2 version number, meant for easier
   parsing and comparisons by programs. The LIBSSH2_VERSION_NUM define will
   always follow this syntax:

0xXXYYZZ

Where XX, YY and ZZ are the main version, release and patch numbers in
   hexadecimal (using 8 bits each). All three numbers are always represented
   using two digits.  1.2 would appear as "0x010200" while version 9.11.7
   appears as "0x090b07".

This 6-digit (24 bits) hexadecimal number does not show pre-release number,
   and it is always a greater number in a more recent release. It makes
   comparisons with greater than and less than work.
*/
#define LIBSSH2_VERSION_NUM 0x010b01

/*
 * This is the date and time when the full source package was created. The
 * timestamp is not stored in the source code repo, as the timestamp is
 * properly set in the tarballs by the maketgz script.
 *
 * The format of the date should follow this template:
 *
 * "Mon Feb 12 11:35:33 UTC 2007"
 */
#define LIBSSH2_TIMESTAMP "Wed Oct 16 08:03:21 UTC 2024"

#ifndef RC_INVOKED

#ifdef __cplusplus
extern "C" {
#endif

#ifdef _WIN32
# include <basetsd.h>
# include <winsock2.h>
#endif

#include <stddef.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>

/* Allow alternate API prefix from CFLAGS or calling app */
#ifndef LIBSSH2_API
# ifdef _WIN32
#  if defined(LIBSSH2_EXPORTS) || defined(_WINDLL)
#   ifdef LIBSSH2_LIBRARY
#    define LIBSSH2_API __declspec(dllexport)
#   else
#    define LIBSSH2_API __declspec(dllimport)
#   endif /* LIBSSH2_LIBRARY */
#  else
#   define LIBSSH2_API
#  endif
# else /* !_WIN32 */
#  define LIBSSH2_API
# endif /* _WIN32 */
#endif /* LIBSSH2_API */

#ifdef HAVE_SYS_UIO_H
# include <sys/uio.h>
#endif

#ifdef _MSC_VER
typedef unsigned char uint8_t;
typedef unsigned short int uint16_t;
typedef unsigned int uint32_t;
typedef __int32 int32_t;
typedef __int64 int64_t;
typedef unsigned __int64 uint64_t;
typedef unsigned __int64 libssh2_uint64_t;
typedef __int64 libssh2_int64_t;
#if (!defined(HAVE_SSIZE_T) && !defined(ssize_t))
typedef SSIZE_T ssize_t;
#define HAVE_SSIZE_T
#endif
#else
#include <stdint.h>
typedef unsigned long long libssh2_uint64_t;
typedef long long libssh2_int64_t;
#endif

#ifdef _WIN32
typedef SOCKET libssh2_socket_t;
#define LIBSSH2_INVALID_SOCKET INVALID_SOCKET
#define LIBSSH2_SOCKET_CLOSE(s) closesocket(s)
#else /* !_WIN32 */
typedef int libssh2_socket_t;
#define LIBSSH2_INVALID_SOCKET -1
#define LIBSSH2_SOCKET_CLOSE(s) close(s)
#endif /* _WIN32 */

/* Compile-time deprecation macros */
#if !defined(LIBSSH2_DISABLE_DEPRECATION) && !defined(LIBSSH2_LIBRARY)
#  if defined(_MSC_VER)
#    if _MSC_VER >= 1400
#      define LIBSSH2_DEPRECATED(version, message) \
         __declspec(deprecated("since libssh2 " # version ". " message))
#    elif _MSC_VER >= 1310
#      define LIBSSH2_DEPRECATED(version, message) \
         __declspec(deprecated)
#   endif
#  elif defined(__GNUC__) && !defined(__INTEL_COMPILER)
#    if (defined(__clang__) && __clang_major__ >= 3) || \
        (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5))
#      define LIBSSH2_DEPRECATED(version, message) \
         __attribute__((deprecated("since libssh2 " # version ". " message)))
#    elif __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 0)
#      define LIBSSH2_DEPRECATED(version, message) \
         __attribute__((deprecated))
#    endif
#  elif defined(__SUNPRO_C) && __SUNPRO_C >= 0x5130
#    define LIBSSH2_DEPRECATED(version, message) \
       __attribute__((deprecated))
#  endif
#endif

#ifndef LIBSSH2_DEPRECATED
#define LIBSSH2_DEPRECATED(version, message)
#endif

/*
 * Determine whether there is small or large file support on windows.
 */

#if defined(_MSC_VER) && !defined(_WIN32_WCE)
#  if (_MSC_VER >= 900) && (_INTEGRAL_MAX_BITS >= 64)
#    define LIBSSH2_USE_WIN32_LARGE_FILES
#  else
#    define LIBSSH2_USE_WIN32_SMALL_FILES
#  endif
#endif

#if defined(__MINGW32__) && !defined(LIBSSH2_USE_WIN32_LARGE_FILES)
#  define LIBSSH2_USE_WIN32_LARGE_FILES
#endif

#if defined(__WATCOMC__) && !defined(LIBSSH2_USE_WIN32_LARGE_FILES)
#  define LIBSSH2_USE_WIN32_LARGE_FILES
#endif

#if defined(__POCC__)
#  undef LIBSSH2_USE_WIN32_LARGE_FILES
#endif

#if defined(_WIN32) && !defined(LIBSSH2_USE_WIN32_LARGE_FILES) && \
    !defined(LIBSSH2_USE_WIN32_SMALL_FILES)
#  define LIBSSH2_USE_WIN32_SMALL_FILES
#endif

/*
 * Large file (>2Gb) support using WIN32 functions.
 */

#ifdef LIBSSH2_USE_WIN32_LARGE_FILES
#  include <io.h>
#  define LIBSSH2_STRUCT_STAT_SIZE_FORMAT    "%I64d"
typedef struct _stati64 libssh2_struct_stat;
typedef __int64 libssh2_struct_stat_size;
#endif

/*
 * Small file (<2Gb) support using WIN32 functions.
 */

#ifdef LIBSSH2_USE_WIN32_SMALL_FILES
#  ifndef _WIN32_WCE
#    define LIBSSH2_STRUCT_STAT_SIZE_FORMAT    "%d"
typedef struct _stat libssh2_struct_stat;
typedef off_t libssh2_struct_stat_size;
#  endif
#endif

#ifndef LIBSSH2_STRUCT_STAT_SIZE_FORMAT
#  ifdef __VMS
/* We have to roll our own format here because %z is a C99-ism we don't
   have. */
#    if __USE_OFF64_T || __USING_STD_STAT
#      define LIBSSH2_STRUCT_STAT_SIZE_FORMAT      "%Ld"
#    else
#      define LIBSSH2_STRUCT_STAT_SIZE_FORMAT      "%d"
#    endif
#  else
#    define LIBSSH2_STRUCT_STAT_SIZE_FORMAT      "%zd"
#  endif
typedef struct stat libssh2_struct_stat;
typedef off_t libssh2_struct_stat_size;
#endif

/* Part of every banner, user specified or not */
#define LIBSSH2_SSH_BANNER                  "SSH-2.0-libssh2_" LIBSSH2_VERSION

#define LIBSSH2_SSH_DEFAULT_BANNER            LIBSSH2_SSH_BANNER
#define LIBSSH2_SSH_DEFAULT_BANNER_WITH_CRLF  LIBSSH2_SSH_DEFAULT_BANNER "\r\n"

/* Defaults for pty requests */
#define LIBSSH2_TERM_WIDTH      80
#define LIBSSH2_TERM_HEIGHT     24
#define LIBSSH2_TERM_WIDTH_PX   0
#define LIBSSH2_TERM_HEIGHT_PX  0

/* 1/4 second */
#define LIBSSH2_SOCKET_POLL_UDELAY      250000
/* 0.25 * 120 == 30 seconds */
#define LIBSSH2_SOCKET_POLL_MAXLOOPS    120

/* Maximum size to allow a payload to compress to, plays it safe by falling
   short of spec limits */
#define LIBSSH2_PACKET_MAXCOMP      32000

/* Maximum size to allow a payload to deccompress to, plays it safe by
   allowing more than spec requires */
#define LIBSSH2_PACKET_MAXDECOMP    40000

/* Maximum size for an inbound compressed payload, plays it safe by
   overshooting spec limits */
#define LIBSSH2_PACKET_MAXPAYLOAD   40000

/* Malloc callbacks */
#define LIBSSH2_ALLOC_FUNC(name)   void *name(size_t count, void **abstract)
#define LIBSSH2_REALLOC_FUNC(name) void *name(void *ptr, size_t count, \
                                              void **abstract)
#define LIBSSH2_FREE_FUNC(name)    void name(void *ptr, void **abstract)

typedef struct _LIBSSH2_USERAUTH_KBDINT_PROMPT
{
    unsigned char *text;
    size_t length;
    unsigned char echo;
} LIBSSH2_USERAUTH_KBDINT_PROMPT;

typedef struct _LIBSSH2_USERAUTH_KBDINT_RESPONSE
{
    char *text;
    unsigned int length;  /* FIXME: change type to size_t */
} LIBSSH2_USERAUTH_KBDINT_RESPONSE;

typedef struct _LIBSSH2_SK_SIG_INFO {
    uint8_t flags;
    uint32_t counter;
    unsigned char *sig_r;
    size_t sig_r_len;
    unsigned char *sig_s;
    size_t sig_s_len;
} LIBSSH2_SK_SIG_INFO;

/* 'publickey' authentication callback */
#define LIBSSH2_USERAUTH_PUBLICKEY_SIGN_FUNC(name) \
    int name(LIBSSH2_SESSION *session, unsigned char **sig, size_t *sig_len, \
             const unsigned char *data, size_t data_len, void **abstract)

/* 'keyboard-interactive' authentication callback */
/* FIXME: name_len, instruction_len -> size_t, num_prompts -> unsigned int? */
#define LIBSSH2_USERAUTH_KBDINT_RESPONSE_FUNC(name_) \
    void name_(const char *name, int name_len, const char *instruction, \
               int instruction_len, int num_prompts, \
               const LIBSSH2_USERAUTH_KBDINT_PROMPT *prompts, \
               LIBSSH2_USERAUTH_KBDINT_RESPONSE *responses, void **abstract)

/* SK authentication callback */
#define LIBSSH2_USERAUTH_SK_SIGN_FUNC(name) \
    int name(LIBSSH2_SESSION *session, LIBSSH2_SK_SIG_INFO *sig_info, \
             const unsigned char *data, size_t data_len, \
             int algorithm, uint8_t flags, \
             const char *application, const unsigned char *key_handle, \
             size_t handle_len, \
             void **abstract)

/* Flags for SK authentication */
#define LIBSSH2_SK_PRESENCE_REQUIRED     0x01
#define LIBSSH2_SK_VERIFICATION_REQUIRED 0x04

/* FIXME: update lengths to size_t (or ssize_t): */

/* Callbacks for special SSH packets */
#define LIBSSH2_IGNORE_FUNC(name) \
    void name(LIBSSH2_SESSION *session, const char *message, int message_len, \
              void **abstract)

#define LIBSSH2_DEBUG_FUNC(name) \
    void name(LIBSSH2_SESSION *session, int always_display, \
              const char *message, int message_len, \
              const char *language, int language_len, \
              void **abstract)

#define LIBSSH2_DISCONNECT_FUNC(name) \
    void name(LIBSSH2_SESSION *session, int reason, \
              const char *message, int message_len, \
              const char *language, int language_len, \
              void **abstract)

#define LIBSSH2_PASSWD_CHANGEREQ_FUNC(name) \
    void name(LIBSSH2_SESSION *session, char **newpw, int *newpw_len, \
              void **abstract)

#define LIBSSH2_MACERROR_FUNC(name) \
    int name(LIBSSH2_SESSION *session, const char *packet, int packet_len, \
             void **abstract)

#define LIBSSH2_X11_OPEN_FUNC(name) \
    void name(LIBSSH2_SESSION *session, LIBSSH2_CHANNEL *channel, \
              const char *shost, int sport, void **abstract)

#define LIBSSH2_AUTHAGENT_FUNC(name) \
    void name(LIBSSH2_SESSION *session, LIBSSH2_CHANNEL *channel, \
              void **abstract)

#define LIBSSH2_ADD_IDENTITIES_FUNC(name) \
    void name(LIBSSH2_SESSION *session, void *buffer, \
              const char *agent_path, void **abstract)

#define LIBSSH2_AUTHAGENT_SIGN_FUNC(name) \
    int name(LIBSSH2_SESSION* session, \
             unsigned char *blob, unsigned int blen, \
             const unsigned char *data, unsigned int dlen, \
             unsigned char **signature, unsigned int *sigLen, \
             const char *agentPath, \
             void **abstract)

#define LIBSSH2_CHANNEL_CLOSE_FUNC(name) \
    void name(LIBSSH2_SESSION *session, void **session_abstract, \
              LIBSSH2_CHANNEL *channel, void **channel_abstract)

/* I/O callbacks */
#define LIBSSH2_RECV_FUNC(name)                                         \
    ssize_t name(libssh2_socket_t socket,                               \
                 void *buffer, size_t length,                           \
                 int flags, void **abstract)
#define LIBSSH2_SEND_FUNC(name)                                         \
    ssize_t name(libssh2_socket_t socket,                               \
                 const void *buffer, size_t length,                     \
                 int flags, void **abstract)

/* libssh2_session_callback_set() constants */
#define LIBSSH2_CALLBACK_IGNORE               0
#define LIBSSH2_CALLBACK_DEBUG                1
#define LIBSSH2_CALLBACK_DISCONNECT           2
#define LIBSSH2_CALLBACK_MACERROR             3
#define LIBSSH2_CALLBACK_X11                  4
#define LIBSSH2_CALLBACK_SEND                 5
#define LIBSSH2_CALLBACK_RECV                 6
#define LIBSSH2_CALLBACK_AUTHAGENT            7
#define LIBSSH2_CALLBACK_AUTHAGENT_IDENTITIES 8
#define LIBSSH2_CALLBACK_AUTHAGENT_SIGN       9

/* libssh2_session_method_pref() constants */
#define LIBSSH2_METHOD_KEX          0
#define LIBSSH2_METHOD_HOSTKEY      1
#define LIBSSH2_METHOD_CRYPT_CS     2
#define LIBSSH2_METHOD_CRYPT_SC     3
#define LIBSSH2_METHOD_MAC_CS       4
#define LIBSSH2_METHOD_MAC_SC       5
#define LIBSSH2_METHOD_COMP_CS      6
#define LIBSSH2_METHOD_COMP_SC      7
#define LIBSSH2_METHOD_LANG_CS      8
#define LIBSSH2_METHOD_LANG_SC      9
#define LIBSSH2_METHOD_SIGN_ALGO    10

/* flags */
#define LIBSSH2_FLAG_SIGPIPE        1
#define LIBSSH2_FLAG_COMPRESS       2
#define LIBSSH2_FLAG_QUOTE_PATHS    3

typedef struct _LIBSSH2_SESSION                     LIBSSH2_SESSION;
typedef struct _LIBSSH2_CHANNEL                     LIBSSH2_CHANNEL;
typedef struct _LIBSSH2_LISTENER                    LIBSSH2_LISTENER;
typedef struct _LIBSSH2_KNOWNHOSTS                  LIBSSH2_KNOWNHOSTS;
typedef struct _LIBSSH2_AGENT                       LIBSSH2_AGENT;

/* SK signature callback */
typedef struct _LIBSSH2_PRIVKEY_SK {
    int algorithm;
    uint8_t flags;
    const char *application;
    const unsigned char *key_handle;
    size_t handle_len;
    LIBSSH2_USERAUTH_SK_SIGN_FUNC((*sign_callback));
    void **orig_abstract;
} LIBSSH2_PRIVKEY_SK;

int
libssh2_sign_sk(LIBSSH2_SESSION *session,
                unsigned char **sig,
                size_t *sig_len,
                const unsigned char *data,
                size_t data_len,
                void **abstract);

typedef struct _LIBSSH2_POLLFD {
    unsigned char type; /* LIBSSH2_POLLFD_* below */

union {
        libssh2_socket_t socket; /* File descriptors -- examined with
                                    system select() call */
        LIBSSH2_CHANNEL *channel; /* Examined by checking internal state */
        LIBSSH2_LISTENER *listener; /* Read polls only -- are inbound
                                       connections waiting to be accepted? */
    } fd;

unsigned long events; /* Requested Events */
    unsigned long revents; /* Returned Events */
} LIBSSH2_POLLFD;

/* Poll FD Descriptor Types */
#define LIBSSH2_POLLFD_SOCKET       1
#define LIBSSH2_POLLFD_CHANNEL      2
#define LIBSSH2_POLLFD_LISTENER     3

/* Note: Win32 Doesn't actually have a poll() implementation, so some of these
   values are faked with select() data */
/* Poll FD events/revents -- Match sys/poll.h where possible */
#define LIBSSH2_POLLFD_POLLIN           0x0001 /* Data available to be read or
                                                  connection available --
                                                  All */
#define LIBSSH2_POLLFD_POLLPRI          0x0002 /* Priority data available to
                                                  be read -- Socket only */
#define LIBSSH2_POLLFD_POLLEXT          0x0002 /* Extended data available to
                                                  be read -- Channel only */
#define LIBSSH2_POLLFD_POLLOUT          0x0004 /* Can may be written --
                                                  Socket/Channel */
/* revents only */
#define LIBSSH2_POLLFD_POLLERR          0x0008 /* Error Condition -- Socket */
#define LIBSSH2_POLLFD_POLLHUP          0x0010 /* HangUp/EOF -- Socket */
#define LIBSSH2_POLLFD_SESSION_CLOSED   0x0010 /* Session Disconnect */
#define LIBSSH2_POLLFD_POLLNVAL         0x0020 /* Invalid request -- Socket
                                                  Only */
#define LIBSSH2_POLLFD_POLLEX           0x0040 /* Exception Condition --
                                                  Socket/Win32 */
#define LIBSSH2_POLLFD_CHANNEL_CLOSED   0x0080 /* Channel Disconnect */
#define LIBSSH2_POLLFD_LISTENER_CLOSED  0x0080 /* Listener Disconnect */

#define HAVE_LIBSSH2_SESSION_BLOCK_DIRECTION
/* Block Direction Types */
#define LIBSSH2_SESSION_BLOCK_INBOUND                  0x0001
#define LIBSSH2_SESSION_BLOCK_OUTBOUND                 0x0002

/* Hash Types */
#define LIBSSH2_HOSTKEY_HASH_MD5                            1
#define LIBSSH2_HOSTKEY_HASH_SHA1                           2
#define LIBSSH2_HOSTKEY_HASH_SHA256                         3

/* Hostkey Types */
#define LIBSSH2_HOSTKEY_TYPE_UNKNOWN            0
#define LIBSSH2_HOSTKEY_TYPE_RSA                1
#define LIBSSH2_HOSTKEY_TYPE_DSS                2  /* deprecated */
#define LIBSSH2_HOSTKEY_TYPE_ECDSA_256          3
#define LIBSSH2_HOSTKEY_TYPE_ECDSA_384          4
#define LIBSSH2_HOSTKEY_TYPE_ECDSA_521          5
#define LIBSSH2_HOSTKEY_TYPE_ED25519            6

/* Disconnect Codes (defined by SSH protocol) */
#define SSH_DISCONNECT_HOST_NOT_ALLOWED_TO_CONNECT          1
#define SSH_DISCONNECT_PROTOCOL_ERROR                       2
#define SSH_DISCONNECT_KEY_EXCHANGE_FAILED                  3
#define SSH_DISCONNECT_RESERVED                             4
#define SSH_DISCONNECT_MAC_ERROR                            5
#define SSH_DISCONNECT_COMPRESSION_ERROR                    6
#define SSH_DISCONNECT_SERVICE_NOT_AVAILABLE                7
#define SSH_DISCONNECT_PROTOCOL_VERSION_NOT_SUPPORTED       8
#define SSH_DISCONNECT_HOST_KEY_NOT_VERIFIABLE              9
#define SSH_DISCONNECT_CONNECTION_LOST                      10
#define SSH_DISCONNECT_BY_APPLICATION                       11
#define SSH_DISCONNECT_TOO_MANY_CONNECTIONS                 12
#define SSH_DISCONNECT_AUTH_CANCELLED_BY_USER               13
#define SSH_DISCONNECT_NO_MORE_AUTH_METHODS_AVAILABLE       14
#define SSH_DISCONNECT_ILLEGAL_USER_NAME                    15

/* Error Codes (defined by libssh2) */
#define LIBSSH2_ERROR_NONE                      0

/* The library once used -1 as a generic error return value on numerous places
   through the code, which subsequently was converted to
   LIBSSH2_ERROR_SOCKET_NONE uses over time. As this is a generic error code,
   the goal is to never ever return this code but instead make sure that a
   more accurate and descriptive error code is used. */
#define LIBSSH2_ERROR_SOCKET_NONE               -1

#define LIBSSH2_ERROR_BANNER_RECV               -2
#define LIBSSH2_ERROR_BANNER_SEND               -3
#define LIBSSH2_ERROR_INVALID_MAC               -4
#define LIBSSH2_ERROR_KEX_FAILURE               -5
#define LIBSSH2_ERROR_ALLOC                     -6
#define LIBSSH2_ERROR_SOCKET_SEND               -7
#define LIBSSH2_ERROR_KEY_EXCHANGE_FAILURE      -8
#define LIBSSH2_ERROR_TIMEOUT                   -9
#define LIBSSH2_ERROR_HOSTKEY_INIT              -10
#define LIBSSH2_ERROR_HOSTKEY_SIGN              -11
#define LIBSSH2_ERROR_DECRYPT                   -12
#define LIBSSH2_ERROR_SOCKET_DISCONNECT         -13
#define LIBSSH2_ERROR_PROTO                     -14
#define LIBSSH2_ERROR_PASSWORD_EXPIRED          -15
#define LIBSSH2_ERROR_FILE                      -16
#define LIBSSH2_ERROR_METHOD_NONE               -17
#define LIBSSH2_ERROR_AUTHENTICATION_FAILED     -18
#define LIBSSH2_ERROR_PUBLICKEY_UNRECOGNIZED    \
    LIBSSH2_ERROR_AUTHENTICATION_FAILED
#define LIBSSH2_ERROR_PUBLICKEY_UNVERIFIED      -19
#define LIBSSH2_ERROR_CHANNEL_OUTOFORDER        -20
#define LIBSSH2_ERROR_CHANNEL_FAILURE           -21
#define LIBSSH2_ERROR_CHANNEL_REQUEST_DENIED    -22
#define LIBSSH2_ERROR_CHANNEL_UNKNOWN           -23
#define LIBSSH2_ERROR_CHANNEL_WINDOW_EXCEEDED   -24
#define LIBSSH2_ERROR_CHANNEL_PACKET_EXCEEDED   -25
#define LIBSSH2_ERROR_CHANNEL_CLOSED            -26
#define LIBSSH2_ERROR_CHANNEL_EOF_SENT          -27
#define LIBSSH2_ERROR_SCP_PROTOCOL              -28
#define LIBSSH2_ERROR_ZLIB                      -29
#define LIBSSH2_ERROR_SOCKET_TIMEOUT            -30
#define LIBSSH2_ERROR_SFTP_PROTOCOL             -31
#define LIBSSH2_ERROR_REQUEST_DENIED            -32
#define LIBSSH2_ERROR_METHOD_NOT_SUPPORTED      -33
#define LIBSSH2_ERROR_INVAL                     -34
#define LIBSSH2_ERROR_INVALID_POLL_TYPE         -35
#define LIBSSH2_ERROR_PUBLICKEY_PROTOCOL        -36
#define LIBSSH2_ERROR_EAGAIN                    -37
#define LIBSSH2_ERROR_BUFFER_TOO_SMALL          -38
#define LIBSSH2_ERROR_BAD_USE                   -39
#define LIBSSH2_ERROR_COMPRESS                  -40
#define LIBSSH2_ERROR_OUT_OF_BOUNDARY           -41
#define LIBSSH2_ERROR_AGENT_PROTOCOL            -42
#define LIBSSH2_ERROR_SOCKET_RECV               -43
#define LIBSSH2_ERROR_ENCRYPT                   -44
#define LIBSSH2_ERROR_BAD_SOCKET                -45
#define LIBSSH2_ERROR_KNOWN_HOSTS               -46
#define LIBSSH2_ERROR_CHANNEL_WINDOW_FULL       -47
#define LIBSSH2_ERROR_KEYFILE_AUTH_FAILED       -48
#define LIBSSH2_ERROR_RANDGEN                   -49
#define LIBSSH2_ERROR_MISSING_USERAUTH_BANNER   -50
#define LIBSSH2_ERROR_ALGO_UNSUPPORTED          -51
#define LIBSSH2_ERROR_MAC_FAILURE               -52
#define LIBSSH2_ERROR_HASH_INIT                 -53
#define LIBSSH2_ERROR_HASH_CALC                 -54

/* this is a define to provide the old (<= 1.2.7) name */
#define LIBSSH2_ERROR_BANNER_NONE LIBSSH2_ERROR_BANNER_RECV

/* Global API */
#define LIBSSH2_INIT_NO_CRYPTO        0x0001

/*
 * libssh2_init()
 *
 * Initialize the libssh2 functions.  This typically initialize the
 * crypto library.  It uses a global state, and is not thread safe --
 * you must make sure this function is not called concurrently.
 *
 * Flags can be:
 * 0:                              Normal initialize
 * LIBSSH2_INIT_NO_CRYPTO:         Do not initialize the crypto library (ie.
 *                                 OPENSSL_add_cipher_algoritms() for OpenSSL
 *
 * Returns 0 if succeeded, or a negative value for error.
 */
LIBSSH2_API int libssh2_init(int flags);

/*
 * libssh2_exit()
 *
 * Exit the libssh2 functions and free's all memory used internal.
 */
LIBSSH2_API void libssh2_exit(void);

/*
 * libssh2_free()
 *
 * Deallocate memory allocated by earlier call to libssh2 functions.
 */
LIBSSH2_API void libssh2_free(LIBSSH2_SESSION *session, void *ptr);

/*
 * libssh2_session_supported_algs()
 *
 * Fills algs with a list of supported acryptographic algorithms. Returns a
 * non-negative number (number of supported algorithms) on success or a
 * negative number (an error code) on failure.
 *
 * NOTE: on success, algs must be deallocated (by calling libssh2_free) when
 * not needed anymore
 */
LIBSSH2_API int libssh2_session_supported_algs(LIBSSH2_SESSION* session,
                                               int method_type,
                                               const char ***algs);

/* Session API */
LIBSSH2_API LIBSSH2_SESSION *
libssh2_session_init_ex(LIBSSH2_ALLOC_FUNC((*my_alloc)),
                        LIBSSH2_FREE_FUNC((*my_free)),
                        LIBSSH2_REALLOC_FUNC((*my_realloc)), void *abstract);
#define libssh2_session_init() libssh2_session_init_ex(NULL, NULL, NULL, NULL)

LIBSSH2_API void **libssh2_session_abstract(LIBSSH2_SESSION *session);

typedef void (libssh2_cb_generic)(void);

LIBSSH2_API libssh2_cb_generic *
libssh2_session_callback_set2(LIBSSH2_SESSION *session, int cbtype,
                              libssh2_cb_generic *callback);

LIBSSH2_DEPRECATED(1.11.1, "Use libssh2_session_callback_set2()")
LIBSSH2_API void *libssh2_session_callback_set(LIBSSH2_SESSION *session,
                                               int cbtype, void *callback);
LIBSSH2_API int libssh2_session_banner_set(LIBSSH2_SESSION *session,
                                           const char *banner);
#ifndef LIBSSH2_NO_DEPRECATED
LIBSSH2_DEPRECATED(1.4.0, "Use libssh2_session_banner_set()")
LIBSSH2_API int libssh2_banner_set(LIBSSH2_SESSION *session,
                                   const char *banner);

LIBSSH2_DEPRECATED(1.2.8, "Use libssh2_session_handshake()")
LIBSSH2_API int libssh2_session_startup(LIBSSH2_SESSION *session, int sock);
#endif
LIBSSH2_API int libssh2_session_handshake(LIBSSH2_SESSION *session,
                                          libssh2_socket_t sock);
LIBSSH2_API int libssh2_session_disconnect_ex(LIBSSH2_SESSION *session,
                                              int reason,
                                              const char *description,
                                              const char *lang);
#define libssh2_session_disconnect(session, description) \
    libssh2_session_disconnect_ex((session), SSH_DISCONNECT_BY_APPLICATION, \
                                  (description), "")

LIBSSH2_API int libssh2_session_free(LIBSSH2_SESSION *session);

LIBSSH2_API const char *libssh2_hostkey_hash(LIBSSH2_SESSION *session,
                                             int hash_type);

LIBSSH2_API const char *libssh2_session_hostkey(LIBSSH2_SESSION *session,
                                                size_t *len, int *type);

LIBSSH2_API int libssh2_session_method_pref(LIBSSH2_SESSION *session,
                                            int method_type,
                                            const char *prefs);
LIBSSH2_API const char *libssh2_session_methods(LIBSSH2_SESSION *session,
                                                int method_type);
LIBSSH2_API int libssh2_session_last_error(LIBSSH2_SESSION *session,
                                           char **errmsg,
                                           int *errmsg_len, int want_buf);
LIBSSH2_API int libssh2_session_last_errno(LIBSSH2_SESSION *session);
LIBSSH2_API int libssh2_session_set_last_error(LIBSSH2_SESSION* session,
                                               int errcode,
                                               const char *errmsg);
LIBSSH2_API int libssh2_session_block_directions(LIBSSH2_SESSION *session);

LIBSSH2_API int libssh2_session_flag(LIBSSH2_SESSION *session, int flag,
                                     int value);
LIBSSH2_API const char *libssh2_session_banner_get(LIBSSH2_SESSION *session);

/* Userauth API */
LIBSSH2_API char *libssh2_userauth_list(LIBSSH2_SESSION *session,
                                        const char *username,
                                        unsigned int username_len);
LIBSSH2_API int libssh2_userauth_banner(LIBSSH2_SESSION *session,
                                        char **banner);
LIBSSH2_API int libssh2_userauth_authenticated(LIBSSH2_SESSION *session);

LIBSSH2_API int
libssh2_userauth_password_ex(LIBSSH2_SESSION *session,
                             const char *username,
                             unsigned int username_len,
                             const char *password,
                             unsigned int password_len,
                             LIBSSH2_PASSWD_CHANGEREQ_FUNC
                                 ((*passwd_change_cb)));

#define libssh2_userauth_password(session, username, password) \
    libssh2_userauth_password_ex((session), (username), \
                                 (unsigned int)strlen(username), \
                                 (password), (unsigned int)strlen(password), \
                                 NULL)

LIBSSH2_API int
libssh2_userauth_publickey_fromfile_ex(LIBSSH2_SESSION *session,
                                       const char *username,
                                       unsigned int username_len,
                                       const char *publickey,
                                       const char *privatekey,
                                       const char *passphrase);

#define libssh2_userauth_publickey_fromfile(session, username, publickey,  \
                                            privatekey, passphrase)        \
    libssh2_userauth_publickey_fromfile_ex((session), (username),          \
                                           (unsigned int)strlen(username), \
                                           (publickey),                    \
                                           (privatekey), (passphrase))

LIBSSH2_API int
libssh2_userauth_publickey(LIBSSH2_SESSION *session,
                           const char *username,
                           const unsigned char *pubkeydata,
                           size_t pubkeydata_len,
                           LIBSSH2_USERAUTH_PUBLICKEY_SIGN_FUNC
                               ((*sign_callback)),
                           void **abstract);

LIBSSH2_API int
libssh2_userauth_hostbased_fromfile_ex(LIBSSH2_SESSION *session,
                                       const char *username,
                                       unsigned int username_len,
                                       const char *publickey,
                                       const char *privatekey,
                                       const char *passphrase,
                                       const char *hostname,
                                       unsigned int hostname_len,
                                       const char *local_username,
                                       unsigned int local_username_len);

#define libssh2_userauth_hostbased_fromfile(session, username, publickey,     \
                                            privatekey, passphrase, hostname) \
    libssh2_userauth_hostbased_fromfile_ex((session), (username),             \
                                           (unsigned int)strlen(username),    \
                                           (publickey),                       \
                                           (privatekey), (passphrase),        \
                                           (hostname),                        \
                                           (unsigned int)strlen(hostname),    \
                                           (username),                        \
                                           (unsigned int)strlen(username))

LIBSSH2_API int
libssh2_userauth_publickey_frommemory(LIBSSH2_SESSION *session,
                                      const char *username,
                                      size_t username_len,
                                      const char *publickeyfiledata,
                                      size_t publickeyfiledata_len,
                                      const char *privatekeyfiledata,
                                      size_t privatekeyfiledata_len,
                                      const char *passphrase);

/*
 * response_callback is provided with filled by library prompts array,
 * but client must allocate and fill individual responses. Responses
 * array is already allocated. Responses data will be freed by libssh2
 * after callback return, but before subsequent callback invocation.
 */
LIBSSH2_API int
libssh2_userauth_keyboard_interactive_ex(LIBSSH2_SESSION* session,
                                         const char *username,
                                         unsigned int username_len,
                                         LIBSSH2_USERAUTH_KBDINT_RESPONSE_FUNC
                                             ((*response_callback)));

#define libssh2_userauth_keyboard_interactive(session, username,             \
                                              response_callback)             \
    libssh2_userauth_keyboard_interactive_ex((session), (username),          \
                                             (unsigned int)strlen(username), \
                                             (response_callback))

LIBSSH2_API int
libssh2_userauth_publickey_sk(LIBSSH2_SESSION *session,
                              const char *username,
                              size_t username_len,
                              const unsigned char *pubkeydata,
                              size_t pubkeydata_len,
                              const char *privatekeydata,
                              size_t privatekeydata_len,
                              const char *passphrase,
                              LIBSSH2_USERAUTH_SK_SIGN_FUNC
                                  ((*sign_callback)),
                              void **abstract);

LIBSSH2_API int libssh2_poll(LIBSSH2_POLLFD *fds, unsigned int nfds,
                             long timeout);

/* Channel API */
#define LIBSSH2_CHANNEL_WINDOW_DEFAULT  (2*1024*1024)
#define LIBSSH2_CHANNEL_PACKET_DEFAULT  32768
#define LIBSSH2_CHANNEL_MINADJUST       1024

/* Extended Data Handling */
#define LIBSSH2_CHANNEL_EXTENDED_DATA_NORMAL        0
#define LIBSSH2_CHANNEL_EXTENDED_DATA_IGNORE        1
#define LIBSSH2_CHANNEL_EXTENDED_DATA_MERGE         2

#define SSH_EXTENDED_DATA_STDERR 1

/* Returned by any function that would block during a read/write operation */
#define LIBSSH2CHANNEL_EAGAIN LIBSSH2_ERROR_EAGAIN

LIBSSH2_API LIBSSH2_CHANNEL *
libssh2_channel_open_ex(LIBSSH2_SESSION *session, const char *channel_type,
                        unsigned int channel_type_len,
                        unsigned int window_size, unsigned int packet_size,
                        const char *message, unsigned int message_len);

#define libssh2_channel_open_session(session) \
    libssh2_channel_open_ex((session), "session", sizeof("session") - 1, \
                            LIBSSH2_CHANNEL_WINDOW_DEFAULT, \
                            LIBSSH2_CHANNEL_PACKET_DEFAULT, NULL, 0)

LIBSSH2_API LIBSSH2_CHANNEL *
libssh2_channel_direct_tcpip_ex(LIBSSH2_SESSION *session, const char *host,
                                int port, const char *shost, int sport);
#define libssh2_channel_direct_tcpip(session, host, port) \
    libssh2_channel_direct_tcpip_ex((session), (host), (port), "127.0.0.1", 22)

LIBSSH2_API LIBSSH2_CHANNEL *
libssh2_channel_direct_streamlocal_ex(LIBSSH2_SESSION * session,
                                      const char *socket_path,
                                      const char *shost, int sport);

LIBSSH2_API LIBSSH2_LISTENER *
libssh2_channel_forward_listen_ex(LIBSSH2_SESSION *session, const char *host,
                                  int port, int *bound_port,
                                  int queue_maxsize);
#define libssh2_channel_forward_listen(session, port) \
    libssh2_channel_forward_listen_ex((session), NULL, (port), NULL, 16)

LIBSSH2_API int libssh2_channel_forward_cancel(LIBSSH2_LISTENER *listener);

LIBSSH2_API LIBSSH2_CHANNEL *
libssh2_channel_forward_accept(LIBSSH2_LISTENER *listener);

LIBSSH2_API int libssh2_channel_setenv_ex(LIBSSH2_CHANNEL *channel,
                                          const char *varname,
                                          unsigned int varname_len,
                                          const char *value,
                                          unsigned int value_len);

#define libssh2_channel_setenv(channel, varname, value)                 \
    libssh2_channel_setenv_ex((channel), (varname),                     \
                              (unsigned int)strlen(varname), (value),   \
                              (unsigned int)strlen(value))

LIBSSH2_API int libssh2_channel_request_auth_agent(LIBSSH2_CHANNEL *channel);

LIBSSH2_API int libssh2_channel_request_pty_ex(LIBSSH2_CHANNEL *channel,
                                               const char *term,
                                               unsigned int term_len,
                                               const char *modes,
                                               unsigned int modes_len,
                                               int width, int height,
                                               int width_px, int height_px);
#define libssh2_channel_request_pty(channel, term)                      \
    libssh2_channel_request_pty_ex((channel), (term),                   \
                                   (unsigned int)strlen(term),          \
                                   NULL, 0,                             \
                                   LIBSSH2_TERM_WIDTH,                  \
                                   LIBSSH2_TERM_HEIGHT,                 \
                                   LIBSSH2_TERM_WIDTH_PX,               \
                                   LIBSSH2_TERM_HEIGHT_PX)

LIBSSH2_API int libssh2_channel_request_pty_size_ex(LIBSSH2_CHANNEL *channel,
                                                    int width, int height,
                                                    int width_px,
                                                    int height_px);
#define libssh2_channel_request_pty_size(channel, width, height) \
    libssh2_channel_request_pty_size_ex((channel), (width), (height), 0, 0)

LIBSSH2_API int libssh2_channel_x11_req_ex(LIBSSH2_CHANNEL *channel,
                                           int single_connection,
                                           const char *auth_proto,
                                           const char *auth_cookie,
                                           int screen_number);
#define libssh2_channel_x11_req(channel, screen_number) \
    libssh2_channel_x11_req_ex((channel), 0, NULL, NULL, (screen_number))

LIBSSH2_API int libssh2_channel_signal_ex(LIBSSH2_CHANNEL *channel,
                                          const char *signame,
                                          size_t signame_len);
#define libssh2_channel_signal(channel, signame) \
    libssh2_channel_signal_ex((channel), signame, strlen(signame))

LIBSSH2_API int libssh2_channel_process_startup(LIBSSH2_CHANNEL *channel,
                                                const char *request,
                                                unsigned int request_len,
                                                const char *message,
                                                unsigned int message_len);
#define libssh2_channel_shell(channel) \
    libssh2_channel_process_startup((channel), "shell", sizeof("shell") - 1, \
                                    NULL, 0)
#define libssh2_channel_exec(channel, command) \
    libssh2_channel_process_startup((channel), "exec", sizeof("exec") - 1, \
                                    (command), (unsigned int)strlen(command))
#define libssh2_channel_subsystem(channel, subsystem) \
    libssh2_channel_process_startup((channel), "subsystem", \
                                    sizeof("subsystem") - 1, (subsystem), \
                                    (unsigned int)strlen(subsystem))

LIBSSH2_API ssize_t libssh2_channel_read_ex(LIBSSH2_CHANNEL *channel,
                                            int stream_id, char *buf,
                                            size_t buflen);
#define libssh2_channel_read(channel, buf, buflen) \
    libssh2_channel_read_ex((channel), 0, \
                            (buf), (buflen))
#define libssh2_channel_read_stderr(channel, buf, buflen) \
    libssh2_channel_read_ex((channel), SSH_EXTENDED_DATA_STDERR, \
                            (buf), (buflen))

LIBSSH2_API int libssh2_poll_channel_read(LIBSSH2_CHANNEL *channel,
                                          int extended);

LIBSSH2_API unsigned long
libssh2_channel_window_read_ex(LIBSSH2_CHANNEL *channel,
                               unsigned long *read_avail,
                               unsigned long *window_size_initial);
#define libssh2_channel_window_read(channel) \
    libssh2_channel_window_read_ex((channel), NULL, NULL)

#ifndef LIBSSH2_NO_DEPRECATED
LIBSSH2_DEPRECATED(1.1.0, "Use libssh2_channel_receive_window_adjust2()")
LIBSSH2_API unsigned long
libssh2_channel_receive_window_adjust(LIBSSH2_CHANNEL *channel,
                                      unsigned long adjustment,
                                      unsigned char force);
#endif
LIBSSH2_API int
libssh2_channel_receive_window_adjust2(LIBSSH2_CHANNEL *channel,
                                       unsigned long adjustment,
                                       unsigned char force,
                                       unsigned int *storewindow);

LIBSSH2_API ssize_t libssh2_channel_write_ex(LIBSSH2_CHANNEL *channel,
                                             int stream_id, const char *buf,
                                             size_t buflen);

#define libssh2_channel_write(channel, buf, buflen) \
    libssh2_channel_write_ex((channel), 0, \
                             (buf), (buflen))
#define libssh2_channel_write_stderr(channel, buf, buflen) \
    libssh2_channel_write_ex((channel), SSH_EXTENDED_DATA_STDERR, \
                             (buf), (buflen))

LIBSSH2_API unsigned long
libssh2_channel_window_write_ex(LIBSSH2_CHANNEL *channel,
                                unsigned long *window_size_initial);
#define libssh2_channel_window_write(channel) \
    libssh2_channel_window_write_ex((channel), NULL)

LIBSSH2_API void libssh2_session_set_blocking(LIBSSH2_SESSION* session,
                                              int blocking);
LIBSSH2_API int libssh2_session_get_blocking(LIBSSH2_SESSION* session);

LIBSSH2_API void libssh2_channel_set_blocking(LIBSSH2_CHANNEL *channel,
                                              int blocking);

LIBSSH2_API void libssh2_session_set_timeout(LIBSSH2_SESSION* session,
                                             long timeout);
LIBSSH2_API long libssh2_session_get_timeout(LIBSSH2_SESSION* session);

LIBSSH2_API void libssh2_session_set_read_timeout(LIBSSH2_SESSION* session,
                                                  long timeout);
LIBSSH2_API long libssh2_session_get_read_timeout(LIBSSH2_SESSION* session);

#ifndef LIBSSH2_NO_DEPRECATED
LIBSSH2_DEPRECATED(1.1.0, "libssh2_channel_handle_extended_data2()")
LIBSSH2_API void libssh2_channel_handle_extended_data(LIBSSH2_CHANNEL *channel,
                                                      int ignore_mode);
#endif
LIBSSH2_API int libssh2_channel_handle_extended_data2(LIBSSH2_CHANNEL *channel,
                                                      int ignore_mode);

#ifndef LIBSSH2_NO_DEPRECATED
/* libssh2_channel_ignore_extended_data() is defined below for BC with version
 * 0.1
 *
 * Future uses should use libssh2_channel_handle_extended_data() directly if
 * LIBSSH2_CHANNEL_EXTENDED_DATA_MERGE is passed, extended data will be read
 * (FIFO) from the standard data channel
 */
/* DEPRECATED since 0.3.0. Use libssh2_channel_handle_extended_data2(). */
#define libssh2_channel_ignore_extended_data(channel, ignore)                 \
    libssh2_channel_handle_extended_data((channel), (ignore) ?                \
                                       LIBSSH2_CHANNEL_EXTENDED_DATA_IGNORE : \
                                       LIBSSH2_CHANNEL_EXTENDED_DATA_NORMAL)
#endif

#define LIBSSH2_CHANNEL_FLUSH_EXTENDED_DATA     -1
#define LIBSSH2_CHANNEL_FLUSH_ALL               -2
LIBSSH2_API int libssh2_channel_flush_ex(LIBSSH2_CHANNEL *channel,
                                         int streamid);
#define libssh2_channel_flush(channel) libssh2_channel_flush_ex((channel), 0)
#define libssh2_channel_flush_stderr(channel) \
    libssh2_channel_flush_ex((channel), SSH_EXTENDED_DATA_STDERR)

LIBSSH2_API int libssh2_channel_get_exit_status(LIBSSH2_CHANNEL* channel);
LIBSSH2_API int libssh2_channel_get_exit_signal(LIBSSH2_CHANNEL* channel,
                                                char **exitsignal,
                                                size_t *exitsignal_len,
                                                char **errmsg,
                                                size_t *errmsg_len,
                                                char **langtag,
                                                size_t *langtag_len);
LIBSSH2_API int libssh2_channel_send_eof(LIBSSH2_CHANNEL *channel);
LIBSSH2_API int libssh2_channel_eof(LIBSSH2_CHANNEL *channel);
LIBSSH2_API int libssh2_channel_wait_eof(LIBSSH2_CHANNEL *channel);
LIBSSH2_API int libssh2_channel_close(LIBSSH2_CHANNEL *channel);
LIBSSH2_API int libssh2_channel_wait_closed(LIBSSH2_CHANNEL *channel);
LIBSSH2_API int libssh2_channel_free(LIBSSH2_CHANNEL *channel);

#ifndef LIBSSH2_NO_DEPRECATED
LIBSSH2_DEPRECATED(1.7.0, "Use libssh2_scp_recv2()")
LIBSSH2_API LIBSSH2_CHANNEL *libssh2_scp_recv(LIBSSH2_SESSION *session,
                                              const char *path,
                                              struct stat *sb);
#endif
/* Use libssh2_scp_recv2() for large (> 2GB) file support on windows */
LIBSSH2_API LIBSSH2_CHANNEL *libssh2_scp_recv2(LIBSSH2_SESSION *session,
                                               const char *path,
                                               libssh2_struct_stat *sb);
LIBSSH2_API LIBSSH2_CHANNEL *libssh2_scp_send_ex(LIBSSH2_SESSION *session,
                                                 const char *path, int mode,
                                                 size_t size, long mtime,
                                                 long atime);
LIBSSH2_API LIBSSH2_CHANNEL *
libssh2_scp_send64(LIBSSH2_SESSION *session, const char *path, int mode,
                   libssh2_int64_t size, time_t mtime, time_t atime);

#define libssh2_scp_send(session, path, mode, size) \
    libssh2_scp_send_ex((session), (path), (mode), (size), 0, 0)

/* DEPRECATED */
LIBSSH2_API int libssh2_base64_decode(LIBSSH2_SESSION *session, char **dest,
                                      unsigned int *dest_len,
                                      const char *src, unsigned int src_len);

LIBSSH2_API
const char *libssh2_version(int req_version_num);

typedef enum {
    libssh2_no_crypto = 0,
    libssh2_openssl,
    libssh2_gcrypt,
    libssh2_mbedtls,
    libssh2_wincng,
    libssh2_os400qc3
} libssh2_crypto_engine_t;

LIBSSH2_API
libssh2_crypto_engine_t libssh2_crypto_engine(void);

#define HAVE_LIBSSH2_KNOWNHOST_API 0x010101 /* since 1.1.1 */
#define HAVE_LIBSSH2_VERSION_API   0x010100 /* libssh2_version since 1.1 */
#define HAVE_LIBSSH2_CRYPTOENGINE_API 0x011100 /* libssh2_crypto_engine
                                                  since 1.11 */

struct libssh2_knownhost {
    unsigned int magic;  /* magic stored by the library */
    void *node; /* handle to the internal representation of this host */
    char *name; /* this is NULL if no plain text host name exists */
    char *key;  /* key in base64/printable format */
    int typemask;
};

/*
 * libssh2_knownhost_init()
 *
 * Init a collection of known hosts. Returns the pointer to a collection.
 *
 */
LIBSSH2_API LIBSSH2_KNOWNHOSTS *
libssh2_knownhost_init(LIBSSH2_SESSION *session);

/*
 * libssh2_knownhost_add()
 *
 * Add a host and its associated key to the collection of known hosts.
 *
 * The 'type' argument specifies on what format the given host and keys are:
 *
 * plain  - ascii "hostname.domain.tld"
 * sha1   - SHA1(<salt> <host>) base64-encoded!
 * custom - another hash
 *
 * If 'sha1' is selected as type, the salt must be provided to the salt
 * argument. This too base64 encoded.
 *
 * The SHA-1 hash is what OpenSSH can be told to use in known_hosts files.  If
 * a custom type is used, salt is ignored and you must provide the host
 * pre-hashed when checking for it in the libssh2_knownhost_check() function.
 *
 * The keylen parameter may be omitted (zero) if the key is provided as a
 * NULL-terminated base64-encoded string.
 */

/* host format (2 bits) */
#define LIBSSH2_KNOWNHOST_TYPE_MASK    0xffff
#define LIBSSH2_KNOWNHOST_TYPE_PLAIN   1
#define LIBSSH2_KNOWNHOST_TYPE_SHA1    2 /* always base64 encoded */
#define LIBSSH2_KNOWNHOST_TYPE_CUSTOM  3

/* key format (2 bits) */
#define LIBSSH2_KNOWNHOST_KEYENC_MASK     (3<<16)
#define LIBSSH2_KNOWNHOST_KEYENC_RAW      (1<<16)
#define LIBSSH2_KNOWNHOST_KEYENC_BASE64   (2<<16)

/* type of key (4 bits) */
#define LIBSSH2_KNOWNHOST_KEY_MASK         (15<<18)
#define LIBSSH2_KNOWNHOST_KEY_SHIFT        18
#define LIBSSH2_KNOWNHOST_KEY_RSA1         (1<<18)
#define LIBSSH2_KNOWNHOST_KEY_SSHRSA       (2<<18)
#define LIBSSH2_KNOWNHOST_KEY_SSHDSS       (3<<18)  /* deprecated */
#define LIBSSH2_KNOWNHOST_KEY_ECDSA_256    (4<<18)
#define LIBSSH2_KNOWNHOST_KEY_ECDSA_384    (5<<18)
#define LIBSSH2_KNOWNHOST_KEY_ECDSA_521    (6<<18)
#define LIBSSH2_KNOWNHOST_KEY_ED25519      (7<<18)
#define LIBSSH2_KNOWNHOST_KEY_UNKNOWN      (15<<18)

LIBSSH2_API int
libssh2_knownhost_add(LIBSSH2_KNOWNHOSTS *hosts,
                      const char *host,
                      const char *salt,
                      const char *key, size_t keylen, int typemask,
                      struct libssh2_knownhost **store);

/*
 * libssh2_knownhost_addc()
 *
 * Add a host and its associated key to the collection of known hosts.
 *
 * Takes a comment argument that may be NULL.  A NULL comment indicates
 * there is no comment and the entry will end directly after the key
 * when written out to a file.  An empty string "" comment will indicate an
 * empty comment which will cause a single space to be written after the key.
 *
 * The 'type' argument specifies on what format the given host and keys are:
 *
 * plain  - ascii "hostname.domain.tld"
 * sha1   - SHA1(<salt> <host>) base64-encoded!
 * custom - another hash
 *
 * If 'sha1' is selected as type, the salt must be provided to the salt
 * argument. This too base64 encoded.
 *
 * The SHA-1 hash is what OpenSSH can be told to use in known_hosts files.
 * If a custom type is used, salt is ignored and you must provide the host
 * pre-hashed when checking for it in the libssh2_knownhost_check() function.
 *
 * The keylen parameter may be omitted (zero) if the key is provided as a
 * NULL-terminated base64-encoded string.
 */

LIBSSH2_API int
libssh2_knownhost_addc(LIBSSH2_KNOWNHOSTS *hosts,
                       const char *host,
                       const char *salt,
                       const char *key, size_t keylen,
                       const char *comment, size_t commentlen, int typemask,
                       struct libssh2_knownhost **store);

/*
 * libssh2_knownhost_check()
 *
 * Check a host and its associated key against the collection of known hosts.
 *
 * The type is the type/format of the given host name.
 *
 * plain  - ascii "hostname.domain.tld"
 * custom - prehashed base64 encoded. Note that this cannot use any salts.
 *
 *
 * 'knownhost' may be set to NULL if you don't care about that info.
 *
 * Returns:
 *
 * LIBSSH2_KNOWNHOST_CHECK_* values, see below
 *
 */

#define LIBSSH2_KNOWNHOST_CHECK_MATCH    0
#define LIBSSH2_KNOWNHOST_CHECK_MISMATCH 1
#define LIBSSH2_KNOWNHOST_CHECK_NOTFOUND 2
#define LIBSSH2_KNOWNHOST_CHECK_FAILURE  3

LIBSSH2_API int
libssh2_knownhost_check(LIBSSH2_KNOWNHOSTS *hosts,
                        const char *host, const char *key, size_t keylen,
                        int typemask,
                        struct libssh2_knownhost **knownhost);

/* this function is identital to the above one, but also takes a port
   argument that allows libssh2 to do a better check */
LIBSSH2_API int
libssh2_knownhost_checkp(LIBSSH2_KNOWNHOSTS *hosts,
                         const char *host, int port,
                         const char *key, size_t keylen,
                         int typemask,
                         struct libssh2_knownhost **knownhost);

/*
 * libssh2_knownhost_del()
 *
 * Remove a host from the collection of known hosts. The 'entry' struct is
 * retrieved by a call to libssh2_knownhost_check().
 *
 */
LIBSSH2_API int
libssh2_knownhost_del(LIBSSH2_KNOWNHOSTS *hosts,
                      struct libssh2_knownhost *entry);

/*
 * libssh2_knownhost_free()
 *
 * Free an entire collection of known hosts.
 *
 */
LIBSSH2_API void
libssh2_knownhost_free(LIBSSH2_KNOWNHOSTS *hosts);

/*
 * libssh2_knownhost_readline()
 *
 * Pass in a line of a file of 'type'. It makes libssh2 read this line.
 *
 * LIBSSH2_KNOWNHOST_FILE_OPENSSH is the only supported type.
 *
 */
LIBSSH2_API int
libssh2_knownhost_readline(LIBSSH2_KNOWNHOSTS *hosts,
                           const char *line, size_t len, int type);

/*
 * libssh2_knownhost_readfile()
 *
 * Add hosts+key pairs from a given file.
 *
 * Returns a negative value for error or number of successfully added hosts.
 *
 * This implementation currently only knows one 'type' (openssh), all others
 * are reserved for future use.
 */

#define LIBSSH2_KNOWNHOST_FILE_OPENSSH 1

LIBSSH2_API int
libssh2_knownhost_readfile(LIBSSH2_KNOWNHOSTS *hosts,
                           const char *filename, int type);

/*
 * libssh2_knownhost_writeline()
 *
 * Ask libssh2 to convert a known host to an output line for storage.
 *
 * Note that this function returns LIBSSH2_ERROR_BUFFER_TOO_SMALL if the given
 * output buffer is too small to hold the desired output.
 *
 * This implementation currently only knows one 'type' (openssh), all others
 * are reserved for future use.
 *
 */
LIBSSH2_API int
libssh2_knownhost_writeline(LIBSSH2_KNOWNHOSTS *hosts,
                            struct libssh2_knownhost *known,
                            char *buffer, size_t buflen,
                            size_t *outlen, /* the amount of written data */
                            int type);

/*
 * libssh2_knownhost_writefile()
 *
 * Write hosts+key pairs to a given file.
 *
 * This implementation currently only knows one 'type' (openssh), all others
 * are reserved for future use.
 */

LIBSSH2_API int
libssh2_knownhost_writefile(LIBSSH2_KNOWNHOSTS *hosts,
                            const char *filename, int type);

/*
 * libssh2_knownhost_get()
 *
 * Traverse the internal list of known hosts. Pass NULL to 'prev' to get
 * the first one. Or pass a pointer to the previously returned one to get the
 * next.
 *
 * Returns:
 * 0 if a fine host was stored in 'store'
 * 1 if end of hosts
 * [negative] on errors
 */
LIBSSH2_API int
libssh2_knownhost_get(LIBSSH2_KNOWNHOSTS *hosts,
                      struct libssh2_knownhost **store,
                      struct libssh2_knownhost *prev);

#define HAVE_LIBSSH2_AGENT_API 0x010202 /* since 1.2.2 */

struct libssh2_agent_publickey {
    unsigned int magic;              /* magic stored by the library */
    void *node;     /* handle to the internal representation of key */
    unsigned char *blob;           /* public key blob */
    size_t blob_len;               /* length of the public key blob */
    char *comment;                 /* comment in printable format */
};

/*
 * libssh2_agent_init()
 *
 * Init an ssh-agent handle. Returns the pointer to the handle.
 *
 */
LIBSSH2_API LIBSSH2_AGENT *
libssh2_agent_init(LIBSSH2_SESSION *session);

/*
 * libssh2_agent_connect()
 *
 * Connect to an ssh-agent.
 *
 * Returns 0 if succeeded, or a negative value for error.
 */
LIBSSH2_API int
libssh2_agent_connect(LIBSSH2_AGENT *agent);

/*
 * libssh2_agent_list_identities()
 *
 * Request an ssh-agent to list identities.
 *
 * Returns 0 if succeeded, or a negative value for error.
 */
LIBSSH2_API int
libssh2_agent_list_identities(LIBSSH2_AGENT *agent);

/*
 * libssh2_agent_get_identity()
 *
 * Traverse the internal list of public keys. Pass NULL to 'prev' to get
 * the first one. Or pass a pointer to the previously returned one to get the
 * next.
 *
 * Returns:
 * 0 if a fine public key was stored in 'store'
 * 1 if end of public keys
 * [negative] on errors
 */
LIBSSH2_API int
libssh2_agent_get_identity(LIBSSH2_AGENT *agent,
                           struct libssh2_agent_publickey **store,
                           struct libssh2_agent_publickey *prev);

/*
 * libssh2_agent_userauth()
 *
 * Do publickey user authentication with the help of ssh-agent.
 *
 * Returns 0 if succeeded, or a negative value for error.
 */
LIBSSH2_API int
libssh2_agent_userauth(LIBSSH2_AGENT *agent,
                       const char *username,
                       struct libssh2_agent_publickey *identity);

/*
 * libssh2_agent_sign()
 *
 * Sign a payload using a system-installed ssh-agent.
 *
 * Returns 0 if succeeded, or a negative value for error.
 */
LIBSSH2_API int
libssh2_agent_sign(LIBSSH2_AGENT *agent,
                   struct libssh2_agent_publickey *identity,
                   unsigned char **sig,
                   size_t *s_len,
                   const unsigned char *data,
                   size_t d_len,
                   const char *method,
                   unsigned int method_len);

/*
 * libssh2_agent_disconnect()
 *
 * Close a connection to an ssh-agent.
 *
 * Returns 0 if succeeded, or a negative value for error.
 */
LIBSSH2_API int
libssh2_agent_disconnect(LIBSSH2_AGENT *agent);

/*
 * libssh2_agent_free()
 *
 * Free an ssh-agent handle.  This function also frees the internal
 * collection of public keys.
 */
LIBSSH2_API void
libssh2_agent_free(LIBSSH2_AGENT *agent);

/*
 * libssh2_agent_set_identity_path()
 *
 * Allows a custom agent identity socket path beyond SSH_AUTH_SOCK env
 *
 */
LIBSSH2_API void
libssh2_agent_set_identity_path(LIBSSH2_AGENT *agent,
                                const char *path);

/*
 * libssh2_agent_get_identity_path()
 *
 * Returns the custom agent identity socket path if set
 *
 */
LIBSSH2_API const char *
libssh2_agent_get_identity_path(LIBSSH2_AGENT *agent);

/*
 * libssh2_keepalive_config()
 *
 * Set how often keepalive messages should be sent.  WANT_REPLY
 * indicates whether the keepalive messages should request a response
 * from the server.  INTERVAL is number of seconds that can pass
 * without any I/O, use 0 (the default) to disable keepalives.  To
 * avoid some busy-loop corner-cases, if you specify an interval of 1
 * it will be treated as 2.
 *
 * Note that non-blocking applications are responsible for sending the
 * keepalive messages using libssh2_keepalive_send().
 */
LIBSSH2_API void libssh2_keepalive_config(LIBSSH2_SESSION *session,
                                          int want_reply,
                                          unsigned int interval);

/*
 * libssh2_keepalive_send()
 *
 * Send a keepalive message if needed.  SECONDS_TO_NEXT indicates how
 * many seconds you can sleep after this call before you need to call
 * it again.  Returns 0 on success, or LIBSSH2_ERROR_SOCKET_SEND on
 * I/O errors.
 */
LIBSSH2_API int libssh2_keepalive_send(LIBSSH2_SESSION *session,
                                       int *seconds_to_next);

/* NOTE NOTE NOTE
   libssh2_trace() has no function in builds that aren't built with debug
   enabled
 */
LIBSSH2_API int libssh2_trace(LIBSSH2_SESSION *session, int bitmask);
#define LIBSSH2_TRACE_TRANS      (1<<1)
#define LIBSSH2_TRACE_KEX        (1<<2)
#define LIBSSH2_TRACE_AUTH       (1<<3)
#define LIBSSH2_TRACE_CONN       (1<<4)
#define LIBSSH2_TRACE_SCP        (1<<5)
#define LIBSSH2_TRACE_SFTP       (1<<6)
#define LIBSSH2_TRACE_ERROR      (1<<7)
#define LIBSSH2_TRACE_PUBLICKEY  (1<<8)
#define LIBSSH2_TRACE_SOCKET     (1<<9)

typedef void (*libssh2_trace_handler_func)(LIBSSH2_SESSION*,
                                           void *,
                                           const char *,
                                           size_t);
LIBSSH2_API int libssh2_trace_sethandler(LIBSSH2_SESSION *session,
                                         void *context,
                                         libssh2_trace_handler_func callback);

#ifdef __cplusplus
} /* extern "C" */
#endif

#endif /* !RC_INVOKED */

#endif /* LIBSSH2_H */

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