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putty-source/putty.h
Simon Tatham 10c9104822 Sanitise control characters from paste data by default. 
This is a mild security measure against malicious clipboard-writing.
It's only mild, because of course there are situations in which even a
sanitised paste could be successfully malicious (imagine someone
managing to write the traditional 'rm -rf' command into your clipboard
when you were going to paste to a shell prompt); but it at least
allows pasting into typical text editors without also allowing the
control sequence that exits the editor UI and returns to the shell
prompt.

This is a configurable option, because there's no well defined line to
be drawn between acceptable and unacceptable pastes, and it's very
plausible that users will have sensible use cases for pasting things
outside the list of permitted characters, or cases in which they know
they trust the clipboard-writer. I for one certainly find it useful on
occasion to deliberately construct a paste containing control
sequences that automate a terminal-based UI.

While I'm at it, when bracketed paste mode is enabled, we also prevent
pasting of data that includes the 'end bracketed paste' sequence
somewhere in the middle. I really _hope_ nobody was treating bracketed
paste mode as a key part of their security boundary, but then again, I
also can't imagine that anyone had an actually sensible use case for
deliberately making a bracketed paste be only partly bracketed, and
it's an easy change while I'm messing about in this area anyway.
2018-03-11 17:40:42 +00:00

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#ifndef PUTTY_PUTTY_H
#define PUTTY_PUTTY_H
#include <stddef.h> /* for wchar_t */
/*
* Global variables. Most modules declare these `extern', but
* window.c will do `#define PUTTY_DO_GLOBALS' before including this
* module, and so will get them properly defined.
*/
#ifndef GLOBAL
#ifdef PUTTY_DO_GLOBALS
#define GLOBAL
#else
#define GLOBAL extern
#endif
#endif
#ifndef DONE_TYPEDEFS
#define DONE_TYPEDEFS
typedef struct conf_tag Conf;
typedef struct backend_tag Backend;
typedef struct terminal_tag Terminal;
#endif
#include "puttyps.h"
#include "network.h"
#include "misc.h"
/*
* Fingerprints of the PGP master keys that can be used to establish a trust
* path between an executable and other files.
*/
#define PGP_MASTER_KEY_FP \
"440D E3B5 B7A1 CA85 B3CC 1718 AB58 5DC6 0467 6F7C"
#define PGP_RSA_MASTER_KEY_FP \
"8F 15 97 DA 25 30 AB 0D 88 D1 92 54 11 CF 0C 4C"
#define PGP_DSA_MASTER_KEY_FP \
"313C 3E76 4B74 C2C5 F2AE 83A8 4F5E 6DF5 6A93 B34E"
/* Three attribute types:
* The ATTRs (normal attributes) are stored with the characters in
* the main display arrays
*
* The TATTRs (temporary attributes) are generated on the fly, they
* can overlap with characters but not with normal attributes.
*
* The LATTRs (line attributes) are an entirely disjoint space of
* flags.
*
* The DATTRs (display attributes) are internal to terminal.c (but
* defined here because their values have to match the others
* here); they reuse the TATTR_* space but are always masked off
* before sending to the front end.
*
* ATTR_INVALID is an illegal colour combination.
*/
#define TATTR_ACTCURS 0x40000000UL /* active cursor (block) */
#define TATTR_PASCURS 0x20000000UL /* passive cursor (box) */
#define TATTR_RIGHTCURS 0x10000000UL /* cursor-on-RHS */
#define TATTR_COMBINING 0x80000000UL /* combining characters */
#define DATTR_STARTRUN 0x80000000UL /* start of redraw run */
#define TDATTR_MASK 0xF0000000UL
#define TATTR_MASK (TDATTR_MASK)
#define DATTR_MASK (TDATTR_MASK)
#define LATTR_NORM 0x00000000UL
#define LATTR_WIDE 0x00000001UL
#define LATTR_TOP 0x00000002UL
#define LATTR_BOT 0x00000003UL
#define LATTR_MODE 0x00000003UL
#define LATTR_WRAPPED 0x00000010UL /* this line wraps to next */
#define LATTR_WRAPPED2 0x00000020UL /* with WRAPPED: CJK wide character
wrapped to next line, so last
single-width cell is empty */
#define ATTR_INVALID 0x03FFFFU
/* Like Linux use the F000 page for direct to font. */
#define CSET_OEMCP 0x0000F000UL /* OEM Codepage DTF */
#define CSET_ACP 0x0000F100UL /* Ansi Codepage DTF */
/* These are internal use overlapping with the UTF-16 surrogates */
#define CSET_ASCII 0x0000D800UL /* normal ASCII charset ESC ( B */
#define CSET_LINEDRW 0x0000D900UL /* line drawing charset ESC ( 0 */
#define CSET_SCOACS 0x0000DA00UL /* SCO Alternate charset */
#define CSET_GBCHR 0x0000DB00UL /* UK variant charset ESC ( A */
#define CSET_MASK 0xFFFFFF00UL /* Character set mask */
#define DIRECT_CHAR(c) ((c&0xFFFFFC00)==0xD800)
#define DIRECT_FONT(c) ((c&0xFFFFFE00)==0xF000)
#define UCSERR (CSET_LINEDRW|'a') /* UCS Format error character. */
/*
* UCSWIDE is a special value used in the terminal data to signify
* the character cell containing the right-hand half of a CJK wide
* character. We use 0xDFFF because it's part of the surrogate
* range and hence won't be used for anything else (it's impossible
* to input it via UTF-8 because our UTF-8 decoder correctly
* rejects surrogates).
*/
#define UCSWIDE 0xDFFF
#define ATTR_NARROW 0x0800000U
#define ATTR_WIDE 0x0400000U
#define ATTR_BOLD 0x0040000U
#define ATTR_UNDER 0x0080000U
#define ATTR_REVERSE 0x0100000U
#define ATTR_BLINK 0x0200000U
#define ATTR_FGMASK 0x00001FFU
#define ATTR_BGMASK 0x003FE00U
#define ATTR_COLOURS 0x003FFFFU
#define ATTR_DIM 0x1000000U
#define ATTR_FGSHIFT 0
#define ATTR_BGSHIFT 9
/*
* The definitive list of colour numbers stored in terminal
* attribute words is kept here. It is:
*
* - 0-7 are ANSI colours (KRGYBMCW).
* - 8-15 are the bold versions of those colours.
* - 16-255 are the remains of the xterm 256-colour mode (a
* 216-colour cube with R at most significant and B at least,
* followed by a uniform series of grey shades running between
* black and white but not including either on grounds of
* redundancy).
* - 256 is default foreground
* - 257 is default bold foreground
* - 258 is default background
* - 259 is default bold background
* - 260 is cursor foreground
* - 261 is cursor background
*/
#define ATTR_DEFFG (256 << ATTR_FGSHIFT)
#define ATTR_DEFBG (258 << ATTR_BGSHIFT)
#define ATTR_DEFAULT (ATTR_DEFFG | ATTR_DEFBG)
struct sesslist {
int nsessions;
const char **sessions;
char *buffer; /* so memory can be freed later */
};
struct unicode_data {
char **uni_tbl;
int dbcs_screenfont;
int font_codepage;
int line_codepage;
wchar_t unitab_scoacs[256];
wchar_t unitab_line[256];
wchar_t unitab_font[256];
wchar_t unitab_xterm[256];
wchar_t unitab_oemcp[256];
unsigned char unitab_ctrl[256];
};
#define LGXF_OVR 1 /* existing logfile overwrite */
#define LGXF_APN 0 /* existing logfile append */
#define LGXF_ASK -1 /* existing logfile ask */
#define LGTYP_NONE 0 /* logmode: no logging */
#define LGTYP_ASCII 1 /* logmode: pure ascii */
#define LGTYP_DEBUG 2 /* logmode: all chars of traffic */
#define LGTYP_PACKETS 3 /* logmode: SSH data packets */
#define LGTYP_SSHRAW 4 /* logmode: SSH raw data */
typedef enum {
/* Actual special commands. Originally Telnet, but some codes have
* been re-used for similar specials in other protocols. */
TS_AYT, TS_BRK, TS_SYNCH, TS_EC, TS_EL, TS_GA, TS_NOP, TS_ABORT,
TS_AO, TS_IP, TS_SUSP, TS_EOR, TS_EOF, TS_LECHO, TS_RECHO, TS_PING,
TS_EOL,
/* Special command for SSH. */
TS_REKEY,
/* POSIX-style signals. (not Telnet) */
TS_SIGABRT, TS_SIGALRM, TS_SIGFPE, TS_SIGHUP, TS_SIGILL,
TS_SIGINT, TS_SIGKILL, TS_SIGPIPE, TS_SIGQUIT, TS_SIGSEGV,
TS_SIGTERM, TS_SIGUSR1, TS_SIGUSR2,
/* Pseudo-specials used for constructing the specials menu. */
TS_SEP, /* Separator */
TS_SUBMENU, /* Start a new submenu with specified name */
TS_EXITMENU, /* Exit current submenu or end of specials */
/* Starting point for protocols to invent special-action codes
* that can't live in this enum at all, e.g. because they change
* with every session.
*
* Of course, this must remain the last value in this
* enumeration. */
TS_LOCALSTART
} Telnet_Special;
struct telnet_special {
const char *name;
int code;
};
typedef enum {
MBT_NOTHING,
MBT_LEFT, MBT_MIDDLE, MBT_RIGHT, /* `raw' button designations */
MBT_SELECT, MBT_EXTEND, MBT_PASTE, /* `cooked' button designations */
MBT_WHEEL_UP, MBT_WHEEL_DOWN /* mouse wheel */
} Mouse_Button;
typedef enum {
MA_NOTHING, MA_CLICK, MA_2CLK, MA_3CLK, MA_DRAG, MA_RELEASE
} Mouse_Action;
/* Keyboard modifiers -- keys the user is actually holding down */
#define PKM_SHIFT 0x01
#define PKM_CONTROL 0x02
#define PKM_META 0x04
#define PKM_ALT 0x08
/* Keyboard flags that aren't really modifiers */
#define PKF_CAPSLOCK 0x10
#define PKF_NUMLOCK 0x20
#define PKF_REPEAT 0x40
/* Stand-alone keysyms for function keys */
typedef enum {
PK_NULL, /* No symbol for this key */
/* Main keypad keys */
PK_ESCAPE, PK_TAB, PK_BACKSPACE, PK_RETURN, PK_COMPOSE,
/* Editing keys */
PK_HOME, PK_INSERT, PK_DELETE, PK_END, PK_PAGEUP, PK_PAGEDOWN,
/* Cursor keys */
PK_UP, PK_DOWN, PK_RIGHT, PK_LEFT, PK_REST,
/* Numeric keypad */ /* Real one looks like: */
PK_PF1, PK_PF2, PK_PF3, PK_PF4, /* PF1 PF2 PF3 PF4 */
PK_KPCOMMA, PK_KPMINUS, PK_KPDECIMAL, /* 7 8 9 - */
PK_KP0, PK_KP1, PK_KP2, PK_KP3, PK_KP4, /* 4 5 6 , */
PK_KP5, PK_KP6, PK_KP7, PK_KP8, PK_KP9, /* 1 2 3 en- */
PK_KPBIGPLUS, PK_KPENTER, /* 0 . ter */
/* Top row */
PK_F1, PK_F2, PK_F3, PK_F4, PK_F5,
PK_F6, PK_F7, PK_F8, PK_F9, PK_F10,
PK_F11, PK_F12, PK_F13, PK_F14, PK_F15,
PK_F16, PK_F17, PK_F18, PK_F19, PK_F20,
PK_PAUSE
} Key_Sym;
#define PK_ISEDITING(k) ((k) >= PK_HOME && (k) <= PK_PAGEDOWN)
#define PK_ISCURSOR(k) ((k) >= PK_UP && (k) <= PK_REST)
#define PK_ISKEYPAD(k) ((k) >= PK_PF1 && (k) <= PK_KPENTER)
#define PK_ISFKEY(k) ((k) >= PK_F1 && (k) <= PK_F20)
enum {
VT_XWINDOWS, VT_OEMANSI, VT_OEMONLY, VT_POORMAN, VT_UNICODE
};
enum {
/*
* SSH-2 key exchange algorithms
*/
KEX_WARN,
KEX_DHGROUP1,
KEX_DHGROUP14,
KEX_DHGEX,
KEX_RSA,
KEX_ECDH,
KEX_MAX
};
enum {
/*
* SSH-2 host key algorithms
*/
HK_WARN,
HK_RSA,
HK_DSA,
HK_ECDSA,
HK_ED25519,
HK_MAX
};
enum {
/*
* SSH ciphers (both SSH-1 and SSH-2)
*/
CIPHER_WARN, /* pseudo 'cipher' */
CIPHER_3DES,
CIPHER_BLOWFISH,
CIPHER_AES, /* (SSH-2 only) */
CIPHER_DES,
CIPHER_ARCFOUR,
CIPHER_CHACHA20,
CIPHER_MAX /* no. ciphers (inc warn) */
};
enum {
/*
* Several different bits of the PuTTY configuration seem to be
* three-way settings whose values are `always yes', `always
* no', and `decide by some more complex automated means'. This
* is true of line discipline options (local echo and line
* editing), proxy DNS, proxy terminal logging, Close On Exit, and
* SSH server bug workarounds. Accordingly I supply a single enum
* here to deal with them all.
*/
FORCE_ON, FORCE_OFF, AUTO
};
enum {
/*
* Proxy types.
*/
PROXY_NONE, PROXY_SOCKS4, PROXY_SOCKS5,
PROXY_HTTP, PROXY_TELNET, PROXY_CMD, PROXY_FUZZ
};
enum {
/*
* Line discipline options which the backend might try to control.
*/
LD_EDIT, /* local line editing */
LD_ECHO /* local echo */
};
enum {
/* Actions on remote window title query */
TITLE_NONE, TITLE_EMPTY, TITLE_REAL
};
enum {
/* Protocol back ends. (CONF_protocol) */
PROT_RAW, PROT_TELNET, PROT_RLOGIN, PROT_SSH,
/* PROT_SERIAL is supported on a subset of platforms, but it doesn't
* hurt to define it globally. */
PROT_SERIAL
};
enum {
/* Bell settings (CONF_beep) */
BELL_DISABLED, BELL_DEFAULT, BELL_VISUAL, BELL_WAVEFILE, BELL_PCSPEAKER
};
enum {
/* Taskbar flashing indication on bell (CONF_beep_ind) */
B_IND_DISABLED, B_IND_FLASH, B_IND_STEADY
};
enum {
/* Resize actions (CONF_resize_action) */
RESIZE_TERM, RESIZE_DISABLED, RESIZE_FONT, RESIZE_EITHER
};
enum {
/* Function key types (CONF_funky_type) */
FUNKY_TILDE,
FUNKY_LINUX,
FUNKY_XTERM,
FUNKY_VT400,
FUNKY_VT100P,
FUNKY_SCO
};
enum {
FQ_DEFAULT, FQ_ANTIALIASED, FQ_NONANTIALIASED, FQ_CLEARTYPE
};
enum {
SER_PAR_NONE, SER_PAR_ODD, SER_PAR_EVEN, SER_PAR_MARK, SER_PAR_SPACE
};
enum {
SER_FLOW_NONE, SER_FLOW_XONXOFF, SER_FLOW_RTSCTS, SER_FLOW_DSRDTR
};
/*
* Tables of string <-> enum value mappings used in settings.c.
* Defined here so that backends can export their GSS library tables
* to the cross-platform settings code.
*/
struct keyvalwhere {
/*
* Two fields which define a string and enum value to be
* equivalent to each other.
*/
const char *s;
int v;
/*
* The next pair of fields are used by gprefs() in settings.c to
* arrange that when it reads a list of strings representing a
* preference list and translates it into the corresponding list
* of integers, strings not appearing in the list are entered in a
* configurable position rather than uniformly at the end.
*/
/*
* 'vrel' indicates which other value in the list to place this
* element relative to. It should be a value that has occurred in
* a 'v' field of some other element of the array, or -1 to
* indicate that we simply place relative to one or other end of
* the list.
*
* gprefs will try to process the elements in an order which makes
* this field work (i.e. so that the element referenced has been
* added before processing this one).
*/
int vrel;
/*
* 'where' indicates whether to place the new value before or
* after the one referred to by vrel. -1 means before; +1 means
* after.
*
* When vrel is -1, this also implicitly indicates which end of
* the array to use. So vrel=-1, where=-1 means to place _before_
* some end of the list (hence, at the last element); vrel=-1,
* where=+1 means to place _after_ an end (hence, at the first).
*/
int where;
};
#ifndef NO_GSSAPI
extern const int ngsslibs;
extern const char *const gsslibnames[]; /* for displaying in configuration */
extern const struct keyvalwhere gsslibkeywords[]; /* for settings.c */
#endif
extern const char *const ttymodes[];
enum {
/*
* Network address types. Used for specifying choice of IPv4/v6
* in config; also used in proxy.c to indicate whether a given
* host name has already been resolved or will be resolved at
* the proxy end.
*/
ADDRTYPE_UNSPEC, ADDRTYPE_IPV4, ADDRTYPE_IPV6, ADDRTYPE_NAME
};
struct backend_tag {
const char *(*init) (void *frontend_handle, void **backend_handle,
Conf *conf, const char *host, int port,
char **realhost, int nodelay, int keepalive);
void (*free) (void *handle);
/* back->reconfig() passes in a replacement configuration. */
void (*reconfig) (void *handle, Conf *conf);
/* back->send() returns the current amount of buffered data. */
int (*send) (void *handle, const char *buf, int len);
/* back->sendbuffer() does the same thing but without attempting a send */
int (*sendbuffer) (void *handle);
void (*size) (void *handle, int width, int height);
void (*special) (void *handle, Telnet_Special code);
const struct telnet_special *(*get_specials) (void *handle);
int (*connected) (void *handle);
int (*exitcode) (void *handle);
/* If back->sendok() returns FALSE, data sent to it from the frontend
* may be lost. */
int (*sendok) (void *handle);
int (*ldisc) (void *handle, int);
void (*provide_ldisc) (void *handle, void *ldisc);
void (*provide_logctx) (void *handle, void *logctx);
/*
* back->unthrottle() tells the back end that the front end
* buffer is clearing.
*/
void (*unthrottle) (void *handle, int);
int (*cfg_info) (void *handle);
/* Only implemented in the SSH protocol: check whether a
* connection-sharing upstream exists for a given configuration. */
int (*test_for_upstream)(const char *host, int port, Conf *conf);
const char *name;
int protocol;
int default_port;
};
extern Backend *backends[];
/*
* Suggested default protocol provided by the backend link module.
* The application is free to ignore this.
*/
extern const int be_default_protocol;
/*
* Name of this particular application, for use in the config box
* and other pieces of text.
*/
extern const char *const appname;
/*
* Some global flags denoting the type of application.
*
* FLAG_VERBOSE is set when the user requests verbose details.
*
* FLAG_STDERR is set in command-line applications (which have a
* functioning stderr that it makes sense to write to) and not in
* GUI applications (which don't).
*
* FLAG_INTERACTIVE is set when a full interactive shell session is
* being run, _either_ because no remote command has been provided
* _or_ because the application is GUI and can't run non-
* interactively.
*
* These flags describe the type of _application_ - they wouldn't
* vary between individual sessions - and so it's OK to have this
* variable be GLOBAL.
*
* Note that additional flags may be defined in platform-specific
* headers. It's probably best if those ones start from 0x1000, to
* avoid collision.
*/
#define FLAG_VERBOSE 0x0001
#define FLAG_STDERR 0x0002
#define FLAG_INTERACTIVE 0x0004
GLOBAL int flags;
/*
* Likewise, these two variables are set up when the application
* initialises, and inform all default-settings accesses after
* that.
*/
GLOBAL int default_protocol;
GLOBAL int default_port;
/*
* This is set TRUE by cmdline.c iff a session is loaded with "-load".
*/
GLOBAL int loaded_session;
/*
* This is set to the name of the loaded session.
*/
GLOBAL char *cmdline_session_name;
struct RSAKey; /* be a little careful of scope */
/*
* Mechanism for getting text strings such as usernames and passwords
* from the front-end.
* The fields are mostly modelled after SSH's keyboard-interactive auth.
* FIXME We should probably mandate a character set/encoding (probably UTF-8).
*
* Since many of the pieces of text involved may be chosen by the server,
* the caller must take care to ensure that the server can't spoof locally-
* generated prompts such as key passphrase prompts. Some ground rules:
* - If the front-end needs to truncate a string, it should lop off the
* end.
* - The front-end should filter out any dangerous characters and
* generally not trust the strings. (But \n is required to behave
* vaguely sensibly, at least in `instruction', and ideally in
* `prompt[]' too.)
*/
typedef struct {
char *prompt;
int echo;
/*
* 'result' must be a dynamically allocated array of exactly
* 'resultsize' chars. The code for actually reading input may
* realloc it bigger (and adjust resultsize accordingly) if it has
* to. The caller should free it again when finished with it.
*
* If resultsize==0, then result may be NULL. When setting up a
* prompt_t, it's therefore easiest to initialise them this way,
* which means all actual allocation is done by the callee. This
* is what add_prompt does.
*/
char *result;
size_t resultsize;
} prompt_t;
typedef struct {
/*
* Indicates whether the information entered is to be used locally
* (for instance a key passphrase prompt), or is destined for the wire.
* This is a hint only; the front-end is at liberty not to use this
* information (so the caller should ensure that the supplied text is
* sufficient).
*/
int to_server;
char *name; /* Short description, perhaps for dialog box title */
int name_reqd; /* Display of `name' required or optional? */
char *instruction; /* Long description, maybe with embedded newlines */
int instr_reqd; /* Display of `instruction' required or optional? */
size_t n_prompts; /* May be zero (in which case display the foregoing,
* if any, and return success) */
prompt_t **prompts;
void *frontend;
void *data; /* slot for housekeeping data, managed by
* get_userpass_input(); initially NULL */
} prompts_t;
prompts_t *new_prompts(void *frontend);
void add_prompt(prompts_t *p, char *promptstr, int echo);
void prompt_set_result(prompt_t *pr, const char *newstr);
void prompt_ensure_result_size(prompt_t *pr, int len);
/* Burn the evidence. (Assumes _all_ strings want free()ing.) */
void free_prompts(prompts_t *p);
/*
* Data type definitions for true-colour terminal display.
* 'optionalrgb' describes a single RGB colour, which overrides the
* other colour settings if 'enabled' is nonzero, and is ignored
* otherwise. 'truecolour' contains a pair of those for foreground and
* background.
*/
typedef struct optionalrgb {
unsigned char enabled;
unsigned char r, g, b;
} optionalrgb;
extern const optionalrgb optionalrgb_none;
typedef struct truecolour {
optionalrgb fg, bg;
} truecolour;
#define optionalrgb_equal(r1,r2) ( \
(r1).enabled==(r2).enabled && \
(r1).r==(r2).r && (r1).g==(r2).g && (r1).b==(r2).b)
#define truecolour_equal(c1,c2) ( \
optionalrgb_equal((c1).fg, (c2).fg) && \
optionalrgb_equal((c1).bg, (c2).bg))
/*
* Enumeration of clipboards. We provide some standard ones cross-
* platform, and then permit each platform to extend this enumeration
* further by defining PLATFORM_CLIPBOARDS in its own header file.
*
* CLIP_NULL is a non-clipboard, writes to which are ignored and reads
* from which return no data.
*
* CLIP_LOCAL refers to a buffer within terminal.c, which
* unconditionally saves the last data selected in the terminal. In
* configurations where a system clipboard is not written
* automatically on selection but instead by an explicit UI action,
* this is where the code responding to that action can find the data
* to write to the clipboard in question.
*/
#define CROSS_PLATFORM_CLIPBOARDS(X) \
X(CLIP_NULL, "null clipboard") \
X(CLIP_LOCAL, "last text selected in terminal") \
/* end of list */
#define ALL_CLIPBOARDS(X) \
CROSS_PLATFORM_CLIPBOARDS(X) \
PLATFORM_CLIPBOARDS(X) \
/* end of list */
#define CLIP_ID(id,name) id,
enum { ALL_CLIPBOARDS(CLIP_ID) N_CLIPBOARDS };
#undef CLIP_ID
/*
* Exports from the front end.
*/
void request_resize(void *frontend, int, int);
void do_text(Context, int, int, wchar_t *, int, unsigned long, int,
truecolour);
void do_cursor(Context, int, int, wchar_t *, int, unsigned long, int,
truecolour);
int char_width(Context ctx, int uc);
#ifdef OPTIMISE_SCROLL
void do_scroll(Context, int, int, int);
#endif
void set_title(void *frontend, char *);
void set_icon(void *frontend, char *);
void set_sbar(void *frontend, int, int, int);
Context get_ctx(void *frontend);
void free_ctx(Context);
void palette_set(void *frontend, int, int, int, int);
void palette_reset(void *frontend);
int palette_get(void *frontend, int n, int *r, int *g, int *b);
void write_clip(void *frontend, int clipboard, wchar_t *, int *,
truecolour *, int, int);
void optimised_move(void *frontend, int, int, int);
void set_raw_mouse_mode(void *frontend, int);
void connection_fatal(void *frontend, const char *, ...);
void nonfatal(const char *, ...);
void modalfatalbox(const char *, ...);
#ifdef macintosh
#pragma noreturn(modalfatalbox)
#endif
void do_beep(void *frontend, int);
void begin_session(void *frontend);
void sys_cursor(void *frontend, int x, int y);
void frontend_request_paste(void *frontend, int clipboard);
void frontend_keypress(void *frontend);
void frontend_echoedit_update(void *frontend, int echo, int edit);
/* It's the backend's responsibility to invoke this at the start of a
* connection, if necessary; it can also invoke it later if the set of
* special commands changes. It does not need to invoke it at session
* shutdown. */
void update_specials_menu(void *frontend);
int from_backend(void *frontend, int is_stderr, const char *data, int len);
int from_backend_untrusted(void *frontend, const char *data, int len);
/* Called when the back end wants to indicate that EOF has arrived on
* the server-to-client stream. Returns FALSE to indicate that we
* intend to keep the session open in the other direction, or TRUE to
* indicate that if they're closing so are we. */
int from_backend_eof(void *frontend);
void notify_remote_exit(void *frontend);
/* Get a sensible value for a tty mode. NULL return = don't set.
* Otherwise, returned value should be freed by caller. */
char *get_ttymode(void *frontend, const char *mode);
/*
* >0 = `got all results, carry on'
* 0 = `user cancelled' (FIXME distinguish "give up entirely" and "next auth"?)
* <0 = `please call back later with more in/inlen'
*/
int get_userpass_input(prompts_t *p, const unsigned char *in, int inlen);
#define OPTIMISE_IS_SCROLL 1
void set_iconic(void *frontend, int iconic);
void move_window(void *frontend, int x, int y);
void set_zorder(void *frontend, int top);
void refresh_window(void *frontend);
void set_zoomed(void *frontend, int zoomed);
int is_iconic(void *frontend);
void get_window_pos(void *frontend, int *x, int *y);
void get_window_pixels(void *frontend, int *x, int *y);
char *get_window_title(void *frontend, int icon);
/* Hint from backend to frontend about time-consuming operations.
* Initial state is assumed to be BUSY_NOT. */
enum {
BUSY_NOT, /* Not busy, all user interaction OK */
BUSY_WAITING, /* Waiting for something; local event loops still running
so some local interaction (e.g. menus) OK, but network
stuff is suspended */
BUSY_CPU /* Locally busy (e.g. crypto); user interaction suspended */
};
void set_busy_status(void *frontend, int status);
int frontend_is_utf8(void *frontend);
void cleanup_exit(int);
/*
* Exports from conf.c, and a big enum (via parametric macro) of
* configuration option keys.
*/
#define CONFIG_OPTIONS(X) \
/* X(value-type, subkey-type, keyword) */ \
X(STR, NONE, host) \
X(INT, NONE, port) \
X(INT, NONE, protocol) \
X(INT, NONE, addressfamily) \
X(INT, NONE, close_on_exit) \
X(INT, NONE, warn_on_close) \
X(INT, NONE, ping_interval) /* in seconds */ \
X(INT, NONE, tcp_nodelay) \
X(INT, NONE, tcp_keepalives) \
X(STR, NONE, loghost) /* logical host being contacted, for host key check */ \
/* Proxy options */ \
X(STR, NONE, proxy_exclude_list) \
X(INT, NONE, proxy_dns) \
X(INT, NONE, even_proxy_localhost) \
X(INT, NONE, proxy_type) \
X(STR, NONE, proxy_host) \
X(INT, NONE, proxy_port) \
X(STR, NONE, proxy_username) \
X(STR, NONE, proxy_password) \
X(STR, NONE, proxy_telnet_command) \
X(INT, NONE, proxy_log_to_term) \
/* SSH options */ \
X(STR, NONE, remote_cmd) \
X(STR, NONE, remote_cmd2) /* fallback if remote_cmd fails; never loaded or saved */ \
X(INT, NONE, nopty) \
X(INT, NONE, compression) \
X(INT, INT, ssh_kexlist) \
X(INT, INT, ssh_hklist) \
X(INT, NONE, ssh_rekey_time) /* in minutes */ \
X(STR, NONE, ssh_rekey_data) /* string encoding e.g. "100K", "2M", "1G" */ \
X(INT, NONE, tryagent) \
X(INT, NONE, agentfwd) \
X(INT, NONE, change_username) /* allow username switching in SSH-2 */ \
X(INT, INT, ssh_cipherlist) \
X(FILENAME, NONE, keyfile) \
/* \
* Which SSH protocol to use. \
* For historical reasons, the current legal values for CONF_sshprot \
* are: \
* 0 = SSH-1 only \
* 3 = SSH-2 only \
* We used to also support \
* 1 = SSH-1 with fallback to SSH-2 \
* 2 = SSH-2 with fallback to SSH-1 \
* and we continue to use 0/3 in storage formats rather than the more \
* obvious 1/2 to avoid surprises if someone saves a session and later \
* downgrades PuTTY. So it's easier to use these numbers internally too. \
*/ \
X(INT, NONE, sshprot) \
X(INT, NONE, ssh2_des_cbc) /* "des-cbc" unrecommended SSH-2 cipher */ \
X(INT, NONE, ssh_no_userauth) /* bypass "ssh-userauth" (SSH-2 only) */ \
X(INT, NONE, ssh_show_banner) /* show USERAUTH_BANNERs (SSH-2 only) */ \
X(INT, NONE, try_tis_auth) \
X(INT, NONE, try_ki_auth) \
X(INT, NONE, try_gssapi_auth) /* attempt gssapi auth */ \
X(INT, NONE, gssapifwd) /* forward tgt via gss */ \
X(INT, INT, ssh_gsslist) /* preference order for local GSS libs */ \
X(FILENAME, NONE, ssh_gss_custom) \
X(INT, NONE, ssh_subsys) /* run a subsystem rather than a command */ \
X(INT, NONE, ssh_subsys2) /* fallback to go with remote_cmd_ptr2 */ \
X(INT, NONE, ssh_no_shell) /* avoid running a shell */ \
X(STR, NONE, ssh_nc_host) /* host to connect to in `nc' mode */ \
X(INT, NONE, ssh_nc_port) /* port to connect to in `nc' mode */ \
/* Telnet options */ \
X(STR, NONE, termtype) \
X(STR, NONE, termspeed) \
X(STR, STR, ttymodes) /* values are "Vvalue" or "A" */ \
X(STR, STR, environmt) \
X(STR, NONE, username) \
X(INT, NONE, username_from_env) \
X(STR, NONE, localusername) \
X(INT, NONE, rfc_environ) \
X(INT, NONE, passive_telnet) \
/* Serial port options */ \
X(STR, NONE, serline) \
X(INT, NONE, serspeed) \
X(INT, NONE, serdatabits) \
X(INT, NONE, serstopbits) \
X(INT, NONE, serparity) \
X(INT, NONE, serflow) \
/* Keyboard options */ \
X(INT, NONE, bksp_is_delete) \
X(INT, NONE, rxvt_homeend) \
X(INT, NONE, funky_type) \
X(INT, NONE, no_applic_c) /* totally disable app cursor keys */ \
X(INT, NONE, no_applic_k) /* totally disable app keypad */ \
X(INT, NONE, no_mouse_rep) /* totally disable mouse reporting */ \
X(INT, NONE, no_remote_resize) /* disable remote resizing */ \
X(INT, NONE, no_alt_screen) /* disable alternate screen */ \
X(INT, NONE, no_remote_wintitle) /* disable remote retitling */ \
X(INT, NONE, no_remote_clearscroll) /* disable ESC[3J */ \
X(INT, NONE, no_dbackspace) /* disable destructive backspace */ \
X(INT, NONE, no_remote_charset) /* disable remote charset config */ \
X(INT, NONE, remote_qtitle_action) /* remote win title query action */ \
X(INT, NONE, app_cursor) \
X(INT, NONE, app_keypad) \
X(INT, NONE, nethack_keypad) \
X(INT, NONE, telnet_keyboard) \
X(INT, NONE, telnet_newline) \
X(INT, NONE, alt_f4) /* is it special? */ \
X(INT, NONE, alt_space) /* is it special? */ \
X(INT, NONE, alt_only) /* is it special? */ \
X(INT, NONE, localecho) \
X(INT, NONE, localedit) \
X(INT, NONE, alwaysontop) \
X(INT, NONE, fullscreenonaltenter) \
X(INT, NONE, scroll_on_key) \
X(INT, NONE, scroll_on_disp) \
X(INT, NONE, erase_to_scrollback) \
X(INT, NONE, compose_key) \
X(INT, NONE, ctrlaltkeys) \
X(INT, NONE, osx_option_meta) \
X(INT, NONE, osx_command_meta) \
X(STR, NONE, wintitle) /* initial window title */ \
/* Terminal options */ \
X(INT, NONE, savelines) \
X(INT, NONE, dec_om) \
X(INT, NONE, wrap_mode) \
X(INT, NONE, lfhascr) \
X(INT, NONE, cursor_type) /* 0=block 1=underline 2=vertical */ \
X(INT, NONE, blink_cur) \
X(INT, NONE, beep) \
X(INT, NONE, beep_ind) \
X(INT, NONE, bellovl) /* bell overload protection active? */ \
X(INT, NONE, bellovl_n) /* number of bells to cause overload */ \
X(INT, NONE, bellovl_t) /* time interval for overload (seconds) */ \
X(INT, NONE, bellovl_s) /* period of silence to re-enable bell (s) */ \
X(FILENAME, NONE, bell_wavefile) \
X(INT, NONE, scrollbar) \
X(INT, NONE, scrollbar_in_fullscreen) \
X(INT, NONE, resize_action) \
X(INT, NONE, bce) \
X(INT, NONE, blinktext) \
X(INT, NONE, win_name_always) \
X(INT, NONE, width) \
X(INT, NONE, height) \
X(FONT, NONE, font) \
X(INT, NONE, font_quality) \
X(FILENAME, NONE, logfilename) \
X(INT, NONE, logtype) \
X(INT, NONE, logxfovr) \
X(INT, NONE, logflush) \
X(INT, NONE, logomitpass) \
X(INT, NONE, logomitdata) \
X(INT, NONE, hide_mouseptr) \
X(INT, NONE, sunken_edge) \
X(INT, NONE, window_border) \
X(STR, NONE, answerback) \
X(STR, NONE, printer) \
X(INT, NONE, arabicshaping) \
X(INT, NONE, bidi) \
/* Colour options */ \
X(INT, NONE, ansi_colour) \
X(INT, NONE, xterm_256_colour) \
X(INT, NONE, true_colour) \
X(INT, NONE, system_colour) \
X(INT, NONE, try_palette) \
X(INT, NONE, bold_style) \
X(INT, INT, colours) \
/* Selection options */ \
X(INT, NONE, mouse_is_xterm) \
X(INT, NONE, rect_select) \
X(INT, NONE, paste_controls) \
X(INT, NONE, rawcnp) \
X(INT, NONE, rtf_paste) \
X(INT, NONE, mouse_override) \
X(INT, INT, wordness) \
X(INT, NONE, mouseautocopy) \
X(INT, NONE, mousepaste) \
X(INT, NONE, ctrlshiftins) \
X(INT, NONE, ctrlshiftcv) \
X(STR, NONE, mousepaste_custom) \
X(STR, NONE, ctrlshiftins_custom) \
X(STR, NONE, ctrlshiftcv_custom) \
/* translations */ \
X(INT, NONE, vtmode) \
X(STR, NONE, line_codepage) \
X(INT, NONE, cjk_ambig_wide) \
X(INT, NONE, utf8_override) \
X(INT, NONE, xlat_capslockcyr) \
/* X11 forwarding */ \
X(INT, NONE, x11_forward) \
X(STR, NONE, x11_display) \
X(INT, NONE, x11_auth) \
X(FILENAME, NONE, xauthfile) \
/* port forwarding */ \
X(INT, NONE, lport_acceptall) /* accept conns from hosts other than localhost */ \
X(INT, NONE, rport_acceptall) /* same for remote forwarded ports (SSH-2 only) */ \
/* \
* Subkeys for 'portfwd' can have the following forms: \
* \
* [LR]localport \
* [LR]localaddr:localport \
* \
* Dynamic forwardings are indicated by an 'L' key, and the \
* special value "D". For all other forwardings, the value \
* should be of the form 'host:port'. \
*/ \
X(STR, STR, portfwd) \
/* SSH bug compatibility modes */ \
X(INT, NONE, sshbug_ignore1) \
X(INT, NONE, sshbug_plainpw1) \
X(INT, NONE, sshbug_rsa1) \
X(INT, NONE, sshbug_hmac2) \
X(INT, NONE, sshbug_derivekey2) \
X(INT, NONE, sshbug_rsapad2) \
X(INT, NONE, sshbug_pksessid2) \
X(INT, NONE, sshbug_rekey2) \
X(INT, NONE, sshbug_maxpkt2) \
X(INT, NONE, sshbug_ignore2) \
X(INT, NONE, sshbug_oldgex2) \
X(INT, NONE, sshbug_winadj) \
X(INT, NONE, sshbug_chanreq) \
/* \
* ssh_simple means that we promise never to open any channel \
* other than the main one, which means it can safely use a very \
* large window in SSH-2. \
*/ \
X(INT, NONE, ssh_simple) \
X(INT, NONE, ssh_connection_sharing) \
X(INT, NONE, ssh_connection_sharing_upstream) \
X(INT, NONE, ssh_connection_sharing_downstream) \
/*
* ssh_manual_hostkeys is conceptually a set rather than a
* dictionary: the string subkeys are the important thing, and the
* actual values to which those subkeys map are all "".
*/ \
X(STR, STR, ssh_manual_hostkeys) \
/* Options for pterm. Should split out into platform-dependent part. */ \
X(INT, NONE, stamp_utmp) \
X(INT, NONE, login_shell) \
X(INT, NONE, scrollbar_on_left) \
X(INT, NONE, shadowbold) \
X(FONT, NONE, boldfont) \
X(FONT, NONE, widefont) \
X(FONT, NONE, wideboldfont) \
X(INT, NONE, shadowboldoffset) \
X(INT, NONE, crhaslf) \
X(STR, NONE, winclass) \
/* Now define the actual enum of option keywords using that macro. */
#define CONF_ENUM_DEF(valtype, keytype, keyword) CONF_ ## keyword,
enum config_primary_key { CONFIG_OPTIONS(CONF_ENUM_DEF) N_CONFIG_OPTIONS };
#undef CONF_ENUM_DEF
#define NCFGCOLOURS 22 /* number of colours in CONF_colours above */
/* Functions handling configuration structures. */
Conf *conf_new(void); /* create an empty configuration */
void conf_free(Conf *conf);
Conf *conf_copy(Conf *oldconf);
void conf_copy_into(Conf *dest, Conf *src);
/* Mandatory accessor functions: enforce by assertion that keys exist. */
int conf_get_int(Conf *conf, int key);
int conf_get_int_int(Conf *conf, int key, int subkey);
char *conf_get_str(Conf *conf, int key); /* result still owned by conf */
char *conf_get_str_str(Conf *conf, int key, const char *subkey);
Filename *conf_get_filename(Conf *conf, int key);
FontSpec *conf_get_fontspec(Conf *conf, int key); /* still owned by conf */
/* Optional accessor function: return NULL if key does not exist. */
char *conf_get_str_str_opt(Conf *conf, int key, const char *subkey);
/* Accessor function to step through a string-subkeyed list.
* Returns the next subkey after the provided one, or the first if NULL.
* Returns NULL if there are none left.
* Both the return value and *subkeyout are still owned by conf. */
char *conf_get_str_strs(Conf *conf, int key, char *subkeyin, char **subkeyout);
/* Return the nth string subkey in a list. Owned by conf. NULL if beyond end */
char *conf_get_str_nthstrkey(Conf *conf, int key, int n);
/* Functions to set entries in configuration. Always copy their inputs. */
void conf_set_int(Conf *conf, int key, int value);
void conf_set_int_int(Conf *conf, int key, int subkey, int value);
void conf_set_str(Conf *conf, int key, const char *value);
void conf_set_str_str(Conf *conf, int key,
const char *subkey, const char *val);
void conf_del_str_str(Conf *conf, int key, const char *subkey);
void conf_set_filename(Conf *conf, int key, const Filename *val);
void conf_set_fontspec(Conf *conf, int key, const FontSpec *val);
/* Serialisation functions for Duplicate Session */
int conf_serialised_size(Conf *conf);
void conf_serialise(Conf *conf, void *data);
int conf_deserialise(Conf *conf, void *data, int maxsize);/*returns size used*/
/*
* Functions to copy, free, serialise and deserialise FontSpecs.
* Provided per-platform, to go with the platform's idea of a
* FontSpec's contents.
*
* fontspec_serialise returns the number of bytes written, and can
* handle data==NULL without crashing. So you can call it once to find
* out a size, then again once you've allocated a buffer.
*/
FontSpec *fontspec_copy(const FontSpec *f);
void fontspec_free(FontSpec *f);
int fontspec_serialise(FontSpec *f, void *data);
FontSpec *fontspec_deserialise(void *data, int maxsize, int *used);
/*
* Exports from noise.c.
*/
void noise_get_heavy(void (*func) (void *, int));
void noise_get_light(void (*func) (void *, int));
void noise_regular(void);
void noise_ultralight(unsigned long data);
void random_save_seed(void);
void random_destroy_seed(void);
/*
* Exports from settings.c.
*/
Backend *backend_from_name(const char *name);
Backend *backend_from_proto(int proto);
char *get_remote_username(Conf *conf); /* dynamically allocated */
char *save_settings(const char *section, Conf *conf);
void save_open_settings(void *sesskey, Conf *conf);
void load_settings(const char *section, Conf *conf);
void load_open_settings(void *sesskey, Conf *conf);
void get_sesslist(struct sesslist *, int allocate);
void do_defaults(const char *, Conf *);
void registry_cleanup(void);
/*
* Functions used by settings.c to provide platform-specific
* default settings.
*
* (The integer one is expected to return `def' if it has no clear
* opinion of its own. This is because there's no integer value
* which I can reliably set aside to indicate `nil'. The string
* function is perfectly all right returning NULL, of course. The
* Filename and FontSpec functions are _not allowed_ to fail to
* return, since these defaults _must_ be per-platform.)
*
* The 'Filename *' returned by platform_default_filename, and the
* 'FontSpec *' returned by platform_default_fontspec, have ownership
* transferred to the caller, and must be freed.
*/
char *platform_default_s(const char *name);
int platform_default_i(const char *name, int def);
Filename *platform_default_filename(const char *name);
FontSpec *platform_default_fontspec(const char *name);
/*
* Exports from terminal.c.
*/
Terminal *term_init(Conf *, struct unicode_data *, void *);
void term_free(Terminal *);
void term_size(Terminal *, int, int, int);
void term_paint(Terminal *, Context, int, int, int, int, int);
void term_scroll(Terminal *, int, int);
void term_scroll_to_selection(Terminal *, int);
void term_pwron(Terminal *, int);
void term_clrsb(Terminal *);
void term_mouse(Terminal *, Mouse_Button, Mouse_Button, Mouse_Action,
int,int,int,int,int);
void term_key(Terminal *, Key_Sym, wchar_t *, size_t, unsigned int,
unsigned int);
void term_lost_clipboard_ownership(Terminal *, int clipboard);
void term_update(Terminal *);
void term_invalidate(Terminal *);
void term_blink(Terminal *, int set_cursor);
void term_do_paste(Terminal *, const wchar_t *, int);
void term_nopaste(Terminal *);
int term_ldisc(Terminal *, int option);
void term_copyall(Terminal *, const int *, int);
void term_reconfig(Terminal *, Conf *);
void term_request_copy(Terminal *, const int *clipboards, int n_clipboards);
void term_request_paste(Terminal *, int clipboard);
void term_seen_key_event(Terminal *);
int term_data(Terminal *, int is_stderr, const char *data, int len);
int term_data_untrusted(Terminal *, const char *data, int len);
void term_provide_resize_fn(Terminal *term,
void (*resize_fn)(void *, int, int),
void *resize_ctx);
void term_provide_logctx(Terminal *term, void *logctx);
void term_set_focus(Terminal *term, int has_focus);
char *term_get_ttymode(Terminal *term, const char *mode);
int term_get_userpass_input(Terminal *term, prompts_t *p,
const unsigned char *in, int inlen);
int format_arrow_key(char *buf, Terminal *term, int xkey, int ctrl);
/*
* Exports from logging.c.
*/
void *log_init(void *frontend, Conf *conf);
void log_free(void *logctx);
void log_reconfig(void *logctx, Conf *conf);
void logfopen(void *logctx);
void logfclose(void *logctx);
void logtraffic(void *logctx, unsigned char c, int logmode);
void logflush(void *logctx);
void log_eventlog(void *logctx, const char *string);
enum { PKT_INCOMING, PKT_OUTGOING };
enum { PKTLOG_EMIT, PKTLOG_BLANK, PKTLOG_OMIT };
struct logblank_t {
int offset;
int len;
int type;
};
void log_packet(void *logctx, int direction, int type,
const char *texttype, const void *data, int len,
int n_blanks, const struct logblank_t *blanks,
const unsigned long *sequence,
unsigned downstream_id, const char *additional_log_text);
/*
* Exports from testback.c
*/
extern Backend null_backend;
extern Backend loop_backend;
/*
* Exports from raw.c.
*/
extern Backend raw_backend;
/*
* Exports from rlogin.c.
*/
extern Backend rlogin_backend;
/*
* Exports from telnet.c.
*/
extern Backend telnet_backend;
/*
* Exports from ssh.c.
*/
extern Backend ssh_backend;
/*
* Exports from ldisc.c.
*/
void *ldisc_create(Conf *, Terminal *, Backend *, void *, void *);
void ldisc_configure(void *, Conf *);
void ldisc_free(void *);
void ldisc_send(void *handle, const char *buf, int len, int interactive);
void ldisc_echoedit_update(void *handle);
/*
* Exports from ldiscucs.c.
*/
void lpage_send(void *, int codepage, const char *buf, int len,
int interactive);
void luni_send(void *, const wchar_t * widebuf, int len, int interactive);
/*
* Exports from sshrand.c.
*/
void random_add_noise(void *noise, int length);
int random_byte(void);
void random_get_savedata(void **data, int *len);
extern int random_active;
/* The random number subsystem is activated if at least one other entity
* within the program expresses an interest in it. So each SSH session
* calls random_ref on startup and random_unref on shutdown. */
void random_ref(void);
void random_unref(void);
/*
* Exports from pinger.c.
*/
typedef struct pinger_tag *Pinger;
Pinger pinger_new(Conf *conf, Backend *back, void *backhandle);
void pinger_reconfig(Pinger, Conf *oldconf, Conf *newconf);
void pinger_free(Pinger);
/*
* Exports from misc.c.
*/
#include "misc.h"
int conf_launchable(Conf *conf);
char const *conf_dest(Conf *conf);
/*
* Exports from sessprep.c.
*/
void prepare_session(Conf *conf);
/*
* Exports from sercfg.c.
*/
void ser_setup_config_box(struct controlbox *b, int midsession,
int parity_mask, int flow_mask);
/*
* Exports from version.c.
*/
extern const char ver[];
/*
* Exports from unicode.c.
*/
#ifndef CP_UTF8
#define CP_UTF8 65001
#endif
/* void init_ucs(void); -- this is now in platform-specific headers */
int is_dbcs_leadbyte(int codepage, char byte);
int mb_to_wc(int codepage, int flags, const char *mbstr, int mblen,
wchar_t *wcstr, int wclen);
int wc_to_mb(int codepage, int flags, const wchar_t *wcstr, int wclen,
char *mbstr, int mblen, const char *defchr, int *defused,
struct unicode_data *ucsdata);
wchar_t xlat_uskbd2cyrllic(int ch);
int check_compose(int first, int second);
int decode_codepage(char *cp_name);
const char *cp_enumerate (int index);
const char *cp_name(int codepage);
void get_unitab(int codepage, wchar_t * unitab, int ftype);
/*
* Exports from wcwidth.c
*/
int mk_wcwidth(unsigned int ucs);
int mk_wcswidth(const unsigned int *pwcs, size_t n);
int mk_wcwidth_cjk(unsigned int ucs);
int mk_wcswidth_cjk(const unsigned int *pwcs, size_t n);
/*
* Exports from mscrypto.c
*/
#ifdef MSCRYPTOAPI
int crypto_startup();
void crypto_wrapup();
#endif
/*
* Exports from pageantc.c.
*
* agent_query returns NULL for here's-a-response, and non-NULL for
* query-in- progress. In the latter case there will be a call to
* `callback' at some future point, passing callback_ctx as the first
* parameter and the actual reply data as the second and third.
*
* The response may be a NULL pointer (in either of the synchronous
* or asynchronous cases), which indicates failure to receive a
* response.
*
* When the return from agent_query is not NULL, it identifies the
* in-progress query in case it needs to be cancelled. If
* agent_cancel_query is called, then the pending query is destroyed
* and the callback will not be called. (E.g. if you're going to throw
* away the thing you were using as callback_ctx.)
*
* Passing a null pointer as callback forces agent_query to behave
* synchronously, i.e. it will block if necessary, and guarantee to
* return NULL. The wrapper function agent_query_synchronous() makes
* this easier.
*/
typedef struct agent_pending_query agent_pending_query;
agent_pending_query *agent_query(
void *in, int inlen, void **out, int *outlen,
void (*callback)(void *, void *, int), void *callback_ctx);
void agent_cancel_query(agent_pending_query *);
void agent_query_synchronous(void *in, int inlen, void **out, int *outlen);
int agent_exists(void);
/*
* Exports from wildcard.c
*/
const char *wc_error(int value);
int wc_match(const char *wildcard, const char *target);
int wc_unescape(char *output, const char *wildcard);
/*
* Exports from frontend (windlg.c etc)
*/
void logevent(void *frontend, const char *);
void pgp_fingerprints(void);
/*
* verify_ssh_host_key() can return one of three values:
*
* - +1 means `key was OK' (either already known or the user just
* approved it) `so continue with the connection'
*
* - 0 means `key was not OK, abandon the connection'
*
* - -1 means `I've initiated enquiries, please wait to be called
* back via the provided function with a result that's either 0
* or +1'.
*/
int verify_ssh_host_key(void *frontend, char *host, int port,
const char *keytype, char *keystr, char *fingerprint,
void (*callback)(void *ctx, int result), void *ctx);
/*
* have_ssh_host_key() just returns true if a key of that type is
* already cached and false otherwise.
*/
int have_ssh_host_key(const char *host, int port, const char *keytype);
/*
* askalg and askhk have the same set of return values as
* verify_ssh_host_key.
*
* (askhk is used in the case where we're using a host key below the
* warning threshold because that's all we have cached, but at least
* one acceptable algorithm is available that we don't have cached.)
*/
int askalg(void *frontend, const char *algtype, const char *algname,
void (*callback)(void *ctx, int result), void *ctx);
int askhk(void *frontend, const char *algname, const char *betteralgs,
void (*callback)(void *ctx, int result), void *ctx);
/*
* askappend can return four values:
*
* - 2 means overwrite the log file
* - 1 means append to the log file
* - 0 means cancel logging for this session
* - -1 means please wait.
*/
int askappend(void *frontend, Filename *filename,
void (*callback)(void *ctx, int result), void *ctx);
/*
* Exports from console frontends (wincons.c, uxcons.c)
* that aren't equivalents to things in windlg.c et al.
*/
extern int console_batch_mode;
int console_get_userpass_input(prompts_t *p, const unsigned char *in,
int inlen);
void console_provide_logctx(void *logctx);
int is_interactive(void);
/*
* Exports from printing.c.
*/
typedef struct printer_enum_tag printer_enum;
typedef struct printer_job_tag printer_job;
printer_enum *printer_start_enum(int *nprinters);
char *printer_get_name(printer_enum *, int);
void printer_finish_enum(printer_enum *);
printer_job *printer_start_job(char *printer);
void printer_job_data(printer_job *, void *, int);
void printer_finish_job(printer_job *);
/*
* Exports from cmdline.c (and also cmdline_error(), which is
* defined differently in various places and required _by_
* cmdline.c).
*
* Note that cmdline_process_param takes a const option string, but a
* writable argument string. That's not a mistake - that's so it can
* zero out password arguments in the hope of not having them show up
* avoidably in Unix 'ps'.
*/
int cmdline_process_param(const char *, char *, int, Conf *);
void cmdline_run_saved(Conf *);
void cmdline_cleanup(void);
int cmdline_get_passwd_input(prompts_t *p, const unsigned char *in, int inlen);
int cmdline_host_ok(Conf *);
#define TOOLTYPE_FILETRANSFER 1
#define TOOLTYPE_NONNETWORK 2
#define TOOLTYPE_HOST_ARG 4
#define TOOLTYPE_HOST_ARG_CAN_BE_SESSION 8
#define TOOLTYPE_HOST_ARG_PROTOCOL_PREFIX 16
#define TOOLTYPE_HOST_ARG_FROM_LAUNCHABLE_LOAD 32
#define TOOLTYPE_PORT_ARG 64
extern int cmdline_tooltype;
void cmdline_error(const char *, ...);
/*
* Exports from config.c.
*/
struct controlbox;
union control;
void conf_radiobutton_handler(union control *ctrl, void *dlg,
void *data, int event);
#define CHECKBOX_INVERT (1<<30)
void conf_checkbox_handler(union control *ctrl, void *dlg,
void *data, int event);
void conf_editbox_handler(union control *ctrl, void *dlg,
void *data, int event);
void conf_filesel_handler(union control *ctrl, void *dlg,
void *data, int event);
void conf_fontsel_handler(union control *ctrl, void *dlg,
void *data, int event);
void setup_config_box(struct controlbox *b, int midsession,
int protocol, int protcfginfo);
/*
* Exports from minibidi.c.
*/
typedef struct bidi_char {
unsigned int origwc, wc;
unsigned short index;
} bidi_char;
int do_bidi(bidi_char *line, int count);
int do_shape(bidi_char *line, bidi_char *to, int count);
int is_rtl(int c);
/*
* X11 auth mechanisms we know about.
*/
enum {
X11_NO_AUTH,
X11_MIT, /* MIT-MAGIC-COOKIE-1 */
X11_XDM, /* XDM-AUTHORIZATION-1 */
X11_NAUTHS
};
extern const char *const x11_authnames[]; /* declared in x11fwd.c */
/*
* An enum for the copy-paste UI action configuration.
*/
enum {
CLIPUI_NONE, /* UI action has no copy/paste effect */
CLIPUI_IMPLICIT, /* use the default clipboard implicit in mouse actions */
CLIPUI_EXPLICIT, /* use the default clipboard for explicit Copy/Paste */
CLIPUI_CUSTOM, /* use a named clipboard (on systems that support it) */
};
/*
* Miscellaneous exports from the platform-specific code.
*
* filename_serialise and filename_deserialise have the same semantics
* as fontspec_serialise and fontspec_deserialise above.
*/
Filename *filename_from_str(const char *string);
const char *filename_to_str(const Filename *fn);
int filename_equal(const Filename *f1, const Filename *f2);
int filename_is_null(const Filename *fn);
Filename *filename_copy(const Filename *fn);
void filename_free(Filename *fn);
int filename_serialise(const Filename *f, void *data);
Filename *filename_deserialise(void *data, int maxsize, int *used);
char *get_username(void); /* return value needs freeing */
char *get_random_data(int bytes, const char *device); /* used in cmdgen.c */
char filename_char_sanitise(char c); /* rewrite special pathname chars */
int open_for_write_would_lose_data(const Filename *fn);
/*
* Exports and imports from timing.c.
*
* schedule_timer() asks the front end to schedule a callback to a
* timer function in a given number of ticks. The returned value is
* the time (in ticks since an arbitrary offset) at which the
* callback can be expected. This value will also be passed as the
* `now' parameter to the callback function. Hence, you can (for
* example) schedule an event at a particular time by calling
* schedule_timer() and storing the return value in your context
* structure as the time when that event is due. The first time a
* callback function gives you that value or more as `now', you do
* the thing.
*
* expire_timer_context() drops all current timers associated with
* a given value of ctx (for when you're about to free ctx).
*
* run_timers() is called from the front end when it has reason to
* think some timers have reached their moment, or when it simply
* needs to know how long to wait next. We pass it the time we
* think it is. It returns TRUE and places the time when the next
* timer needs to go off in `next', or alternatively it returns
* FALSE if there are no timers at all pending.
*
* timer_change_notify() must be supplied by the front end; it
* notifies the front end that a new timer has been added to the
* list which is sooner than any existing ones. It provides the
* time when that timer needs to go off.
*
* *** FRONT END IMPLEMENTORS NOTE:
*
* There's an important subtlety in the front-end implementation of
* the timer interface. When a front end is given a `next' value,
* either returned from run_timers() or via timer_change_notify(),
* it should ensure that it really passes _that value_ as the `now'
* parameter to its next run_timers call. It should _not_ simply
* call GETTICKCOUNT() to get the `now' parameter when invoking
* run_timers().
*
* The reason for this is that an OS's system clock might not agree
* exactly with the timing mechanisms it supplies to wait for a
* given interval. I'll illustrate this by the simple example of
* Unix Plink, which uses timeouts to select() in a way which for
* these purposes can simply be considered to be a wait() function.
* Suppose, for the sake of argument, that this wait() function
* tends to return early by 1%. Then a possible sequence of actions
* is:
*
* - run_timers() tells the front end that the next timer firing
* is 10000ms from now.
* - Front end calls wait(10000ms), but according to
* GETTICKCOUNT() it has only waited for 9900ms.
* - Front end calls run_timers() again, passing time T-100ms as
* `now'.
* - run_timers() does nothing, and says the next timer firing is
* still 100ms from now.
* - Front end calls wait(100ms), which only waits for 99ms.
* - Front end calls run_timers() yet again, passing time T-1ms.
* - run_timers() says there's still 1ms to wait.
* - Front end calls wait(1ms).
*
* If you're _lucky_ at this point, wait(1ms) will actually wait
* for 1ms and you'll only have woken the program up three times.
* If you're unlucky, wait(1ms) might do nothing at all due to
* being below some minimum threshold, and you might find your
* program spends the whole of the last millisecond tight-looping
* between wait() and run_timers().
*
* Instead, what you should do is to _save_ the precise `next'
* value provided by run_timers() or via timer_change_notify(), and
* use that precise value as the input to the next run_timers()
* call. So:
*
* - run_timers() tells the front end that the next timer firing
* is at time T, 10000ms from now.
* - Front end calls wait(10000ms).
* - Front end then immediately calls run_timers() and passes it
* time T, without stopping to check GETTICKCOUNT() at all.
*
* This guarantees that the program wakes up only as many times as
* there are actual timer actions to be taken, and that the timing
* mechanism will never send it into a tight loop.
*
* (It does also mean that the timer action in the above example
* will occur 100ms early, but this is not generally critical. And
* the hypothetical 1% error in wait() will be partially corrected
* for anyway when, _after_ run_timers() returns, you call
* GETTICKCOUNT() and compare the result with the returned `next'
* value to find out how long you have to make your next wait().)
*/
typedef void (*timer_fn_t)(void *ctx, unsigned long now);
unsigned long schedule_timer(int ticks, timer_fn_t fn, void *ctx);
void expire_timer_context(void *ctx);
int run_timers(unsigned long now, unsigned long *next);
void timer_change_notify(unsigned long next);
unsigned long timing_last_clock(void);
/*
* Exports from callback.c.
*
* This provides a method of queuing function calls to be run at the
* earliest convenience from the top-level event loop. Use it if
* you're deep in a nested chain of calls and want to trigger an
* action which will probably lead to your function being re-entered
* recursively if you just call the initiating function the normal
* way.
*
* Most front ends run the queued callbacks by simply calling
* run_toplevel_callbacks() after handling each event in their
* top-level event loop. However, if a front end doesn't have control
* over its own event loop (e.g. because it's using GTK) then it can
* instead request notifications when a callback is available, so that
* it knows to ask its delegate event loop to do the same thing. Also,
* if a front end needs to know whether a callback is pending without
* actually running it (e.g. so as to put a zero timeout on a select()
* call) then it can call toplevel_callback_pending(), which will
* return true if at least one callback is in the queue.
*/
typedef void (*toplevel_callback_fn_t)(void *ctx);
void queue_toplevel_callback(toplevel_callback_fn_t fn, void *ctx);
void run_toplevel_callbacks(void);
int toplevel_callback_pending(void);
void delete_callbacks_for_context(void *ctx);
typedef void (*toplevel_callback_notify_fn_t)(void *frontend);
void request_callback_notifications(toplevel_callback_notify_fn_t notify,
void *frontend);
/*
* Define no-op macros for the jump list functions, on platforms that
* don't support them. (This is a bit of a hack, and it'd be nicer to
* localise even the calls to those functions into the Windows front
* end, but it'll do for the moment.)
*/
#ifndef JUMPLIST_SUPPORTED
#define add_session_to_jumplist(x) ((void)0)
#define remove_session_from_jumplist(x) ((void)0)
#endif
/* SURROGATE PAIR */
#define HIGH_SURROGATE_START 0xd800
#define HIGH_SURROGATE_END 0xdbff
#define LOW_SURROGATE_START 0xdc00
#define LOW_SURROGATE_END 0xdfff
/* These macros exist in the Windows API, so the environment may
* provide them. If not, define them in terms of the above. */
#ifndef IS_HIGH_SURROGATE
#define IS_HIGH_SURROGATE(wch) (((wch) >= HIGH_SURROGATE_START) && \
((wch) <= HIGH_SURROGATE_END))
#define IS_LOW_SURROGATE(wch) (((wch) >= LOW_SURROGATE_START) && \
((wch) <= LOW_SURROGATE_END))
#define IS_SURROGATE_PAIR(hs, ls) (IS_HIGH_SURROGATE(hs) && \
IS_LOW_SURROGATE(ls))
#endif
#define IS_SURROGATE(wch) (((wch) >= HIGH_SURROGATE_START) && \
((wch) <= LOW_SURROGATE_END))
#define HIGH_SURROGATE_OF(codept) \
(HIGH_SURROGATE_START + (((codept) - 0x10000) >> 10))
#define LOW_SURROGATE_OF(codept) \
(LOW_SURROGATE_START + (((codept) - 0x10000) & 0x3FF))
#define FROM_SURROGATES(wch1, wch2) \
(0x10000 + (((wch1) & 0x3FF) << 10) + ((wch2) & 0x3FF))
#endif
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