зеркало из https://github.com/github/putty.git
2239 строки
85 KiB
C
2239 строки
85 KiB
C
#ifndef PUTTY_PUTTY_H
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#define PUTTY_PUTTY_H
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#include <stddef.h> /* for wchar_t */
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#include <limits.h> /* for INT_MAX */
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/*
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* Global variables. Most modules declare these `extern', but
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* window.c will do `#define PUTTY_DO_GLOBALS' before including this
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* module, and so will get them properly defined.
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*/
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#ifndef GLOBAL
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#ifdef PUTTY_DO_GLOBALS
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#define GLOBAL
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#else
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#define GLOBAL extern
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#endif
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#endif
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#include "defs.h"
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#include "puttyps.h"
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#include "network.h"
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#include "misc.h"
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#include "marshal.h"
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/*
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* We express various time intervals in unsigned long minutes, but may need to
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* clip some values so that the resulting number of ticks does not overflow an
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* integer value.
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*/
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#define MAX_TICK_MINS (INT_MAX / (60 * TICKSPERSEC))
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/*
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* Fingerprints of the current and previous PGP master keys, to
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* establish a trust path between an executable and other files.
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*/
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#define PGP_MASTER_KEY_YEAR "2018"
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#define PGP_MASTER_KEY_DETAILS "RSA, 4096-bit"
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#define PGP_MASTER_KEY_FP \
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"24E1 B1C5 75EA 3C9F F752 A922 76BC 7FE4 EBFD 2D9E"
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#define PGP_PREV_MASTER_KEY_YEAR "2015"
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#define PGP_PREV_MASTER_KEY_DETAILS "RSA, 4096-bit"
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#define PGP_PREV_MASTER_KEY_FP \
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"440D E3B5 B7A1 CA85 B3CC 1718 AB58 5DC6 0467 6F7C"
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/* Three attribute types:
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* The ATTRs (normal attributes) are stored with the characters in
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* the main display arrays
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*
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* The TATTRs (temporary attributes) are generated on the fly, they
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* can overlap with characters but not with normal attributes.
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*
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* The LATTRs (line attributes) are an entirely disjoint space of
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* flags.
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*
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* The DATTRs (display attributes) are internal to terminal.c (but
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* defined here because their values have to match the others
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* here); they reuse the TATTR_* space but are always masked off
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* before sending to the front end.
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*
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* ATTR_INVALID is an illegal colour combination.
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*/
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#define TATTR_ACTCURS 0x40000000UL /* active cursor (block) */
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#define TATTR_PASCURS 0x20000000UL /* passive cursor (box) */
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#define TATTR_RIGHTCURS 0x10000000UL /* cursor-on-RHS */
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#define TATTR_COMBINING 0x80000000UL /* combining characters */
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#define DATTR_STARTRUN 0x80000000UL /* start of redraw run */
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#define TDATTR_MASK 0xF0000000UL
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#define TATTR_MASK (TDATTR_MASK)
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#define DATTR_MASK (TDATTR_MASK)
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#define LATTR_NORM 0x00000000UL
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#define LATTR_WIDE 0x00000001UL
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#define LATTR_TOP 0x00000002UL
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#define LATTR_BOT 0x00000003UL
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#define LATTR_MODE 0x00000003UL
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#define LATTR_WRAPPED 0x00000010UL /* this line wraps to next */
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#define LATTR_WRAPPED2 0x00000020UL /* with WRAPPED: CJK wide character
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wrapped to next line, so last
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single-width cell is empty */
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#define ATTR_INVALID 0x03FFFFU
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/* Like Linux use the F000 page for direct to font. */
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#define CSET_OEMCP 0x0000F000UL /* OEM Codepage DTF */
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#define CSET_ACP 0x0000F100UL /* Ansi Codepage DTF */
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/* These are internal use overlapping with the UTF-16 surrogates */
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#define CSET_ASCII 0x0000D800UL /* normal ASCII charset ESC ( B */
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#define CSET_LINEDRW 0x0000D900UL /* line drawing charset ESC ( 0 */
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#define CSET_SCOACS 0x0000DA00UL /* SCO Alternate charset */
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#define CSET_GBCHR 0x0000DB00UL /* UK variant charset ESC ( A */
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#define CSET_MASK 0xFFFFFF00UL /* Character set mask */
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#define DIRECT_CHAR(c) ((c&0xFFFFFC00)==0xD800)
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#define DIRECT_FONT(c) ((c&0xFFFFFE00)==0xF000)
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#define UCSERR (CSET_LINEDRW|'a') /* UCS Format error character. */
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/*
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* UCSWIDE is a special value used in the terminal data to signify
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* the character cell containing the right-hand half of a CJK wide
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* character. We use 0xDFFF because it's part of the surrogate
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* range and hence won't be used for anything else (it's impossible
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* to input it via UTF-8 because our UTF-8 decoder correctly
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* rejects surrogates).
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*/
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#define UCSWIDE 0xDFFF
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#define ATTR_NARROW 0x0800000U
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#define ATTR_WIDE 0x0400000U
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#define ATTR_BOLD 0x0040000U
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#define ATTR_UNDER 0x0080000U
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#define ATTR_REVERSE 0x0100000U
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#define ATTR_BLINK 0x0200000U
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#define ATTR_FGMASK 0x00001FFU
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#define ATTR_BGMASK 0x003FE00U
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#define ATTR_COLOURS 0x003FFFFU
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#define ATTR_DIM 0x1000000U
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#define ATTR_FGSHIFT 0
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#define ATTR_BGSHIFT 9
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/*
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* The definitive list of colour numbers stored in terminal
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* attribute words is kept here. It is:
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*
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* - 0-7 are ANSI colours (KRGYBMCW).
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* - 8-15 are the bold versions of those colours.
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* - 16-255 are the remains of the xterm 256-colour mode (a
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* 216-colour cube with R at most significant and B at least,
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* followed by a uniform series of grey shades running between
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* black and white but not including either on grounds of
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* redundancy).
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* - 256 is default foreground
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* - 257 is default bold foreground
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* - 258 is default background
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* - 259 is default bold background
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* - 260 is cursor foreground
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* - 261 is cursor background
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*/
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#define ATTR_DEFFG (256 << ATTR_FGSHIFT)
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#define ATTR_DEFBG (258 << ATTR_BGSHIFT)
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#define ATTR_DEFAULT (ATTR_DEFFG | ATTR_DEFBG)
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struct sesslist {
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int nsessions;
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const char **sessions;
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char *buffer; /* so memory can be freed later */
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};
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struct unicode_data {
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char **uni_tbl;
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bool dbcs_screenfont;
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int font_codepage;
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int line_codepage;
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wchar_t unitab_scoacs[256];
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wchar_t unitab_line[256];
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wchar_t unitab_font[256];
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wchar_t unitab_xterm[256];
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wchar_t unitab_oemcp[256];
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unsigned char unitab_ctrl[256];
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};
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#define LGXF_OVR 1 /* existing logfile overwrite */
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#define LGXF_APN 0 /* existing logfile append */
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#define LGXF_ASK -1 /* existing logfile ask */
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#define LGTYP_NONE 0 /* logmode: no logging */
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#define LGTYP_ASCII 1 /* logmode: pure ascii */
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#define LGTYP_DEBUG 2 /* logmode: all chars of traffic */
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#define LGTYP_PACKETS 3 /* logmode: SSH data packets */
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#define LGTYP_SSHRAW 4 /* logmode: SSH raw data */
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/*
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* Enumeration of 'special commands' that can be sent during a
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* session, separately from the byte stream of ordinary session data.
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*/
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typedef enum {
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/*
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* Commands that are generally useful in multiple backends.
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*/
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SS_BRK, /* serial-line break */
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SS_EOF, /* end-of-file on session input */
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SS_NOP, /* transmit data with no effect */
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SS_PING, /* try to keep the session alive (probably, but not
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* necessarily, implemented as SS_NOP) */
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/*
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* Commands specific to Telnet.
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*/
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SS_AYT, /* Are You There */
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SS_SYNCH, /* Synch */
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SS_EC, /* Erase Character */
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SS_EL, /* Erase Line */
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SS_GA, /* Go Ahead */
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SS_ABORT, /* Abort Process */
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SS_AO, /* Abort Output */
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SS_IP, /* Interrupt Process */
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SS_SUSP, /* Suspend Process */
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SS_EOR, /* End Of Record */
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SS_EOL, /* Telnet end-of-line sequence (CRLF, as opposed to CR
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* NUL that escapes a literal CR) */
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/*
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* Commands specific to SSH.
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*/
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SS_REKEY, /* trigger an immediate repeat key exchange */
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SS_XCERT, /* cross-certify another host key ('arg' indicates which) */
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/*
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* Send a POSIX-style signal. (Useful in SSH and also pterm.)
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*
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* We use the master list in sshsignals.h to define these enum
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* values, which will come out looking like names of the form
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* SS_SIGABRT, SS_SIGINT etc.
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*/
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#define SIGNAL_MAIN(name, text) SS_SIG ## name,
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#define SIGNAL_SUB(name) SS_SIG ## name,
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#include "sshsignals.h"
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#undef SIGNAL_MAIN
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#undef SIGNAL_SUB
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/*
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* These aren't really special commands, but they appear in the
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* enumeration because the list returned from
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* backend_get_specials() will use them to specify the structure
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* of the GUI specials menu.
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*/
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SS_SEP, /* Separator */
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SS_SUBMENU, /* Start a new submenu with specified name */
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SS_EXITMENU, /* Exit current submenu, or end of entire specials list */
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} SessionSpecialCode;
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/*
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* The structure type returned from backend_get_specials.
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*/
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struct SessionSpecial {
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const char *name;
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SessionSpecialCode code;
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int arg;
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};
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/* Needed by both sshchan.h and sshppl.h */
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typedef void (*add_special_fn_t)(
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void *ctx, const char *text, SessionSpecialCode code, int arg);
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typedef enum {
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MBT_NOTHING,
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MBT_LEFT, MBT_MIDDLE, MBT_RIGHT, /* `raw' button designations */
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MBT_SELECT, MBT_EXTEND, MBT_PASTE, /* `cooked' button designations */
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MBT_WHEEL_UP, MBT_WHEEL_DOWN /* mouse wheel */
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} Mouse_Button;
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typedef enum {
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MA_NOTHING, MA_CLICK, MA_2CLK, MA_3CLK, MA_DRAG, MA_RELEASE
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} Mouse_Action;
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/* Keyboard modifiers -- keys the user is actually holding down */
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#define PKM_SHIFT 0x01
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#define PKM_CONTROL 0x02
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#define PKM_META 0x04
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#define PKM_ALT 0x08
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/* Keyboard flags that aren't really modifiers */
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#define PKF_CAPSLOCK 0x10
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#define PKF_NUMLOCK 0x20
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#define PKF_REPEAT 0x40
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/* Stand-alone keysyms for function keys */
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typedef enum {
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PK_NULL, /* No symbol for this key */
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/* Main keypad keys */
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PK_ESCAPE, PK_TAB, PK_BACKSPACE, PK_RETURN, PK_COMPOSE,
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/* Editing keys */
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PK_HOME, PK_INSERT, PK_DELETE, PK_END, PK_PAGEUP, PK_PAGEDOWN,
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/* Cursor keys */
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PK_UP, PK_DOWN, PK_RIGHT, PK_LEFT, PK_REST,
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/* Numeric keypad */ /* Real one looks like: */
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PK_PF1, PK_PF2, PK_PF3, PK_PF4, /* PF1 PF2 PF3 PF4 */
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PK_KPCOMMA, PK_KPMINUS, PK_KPDECIMAL, /* 7 8 9 - */
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PK_KP0, PK_KP1, PK_KP2, PK_KP3, PK_KP4, /* 4 5 6 , */
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PK_KP5, PK_KP6, PK_KP7, PK_KP8, PK_KP9, /* 1 2 3 en- */
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PK_KPBIGPLUS, PK_KPENTER, /* 0 . ter */
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/* Top row */
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PK_F1, PK_F2, PK_F3, PK_F4, PK_F5,
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PK_F6, PK_F7, PK_F8, PK_F9, PK_F10,
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PK_F11, PK_F12, PK_F13, PK_F14, PK_F15,
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PK_F16, PK_F17, PK_F18, PK_F19, PK_F20,
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PK_PAUSE
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} Key_Sym;
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#define PK_ISEDITING(k) ((k) >= PK_HOME && (k) <= PK_PAGEDOWN)
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#define PK_ISCURSOR(k) ((k) >= PK_UP && (k) <= PK_REST)
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#define PK_ISKEYPAD(k) ((k) >= PK_PF1 && (k) <= PK_KPENTER)
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#define PK_ISFKEY(k) ((k) >= PK_F1 && (k) <= PK_F20)
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enum {
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VT_XWINDOWS, VT_OEMANSI, VT_OEMONLY, VT_POORMAN, VT_UNICODE
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};
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enum {
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/*
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* SSH-2 key exchange algorithms
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*/
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KEX_WARN,
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KEX_DHGROUP1,
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KEX_DHGROUP14,
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KEX_DHGEX,
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KEX_RSA,
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KEX_ECDH,
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KEX_MAX
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};
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enum {
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/*
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* SSH-2 host key algorithms
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*/
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HK_WARN,
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HK_RSA,
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HK_DSA,
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HK_ECDSA,
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HK_ED25519,
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HK_MAX
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};
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enum {
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/*
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* SSH ciphers (both SSH-1 and SSH-2)
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*/
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CIPHER_WARN, /* pseudo 'cipher' */
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CIPHER_3DES,
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CIPHER_BLOWFISH,
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CIPHER_AES, /* (SSH-2 only) */
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CIPHER_DES,
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CIPHER_ARCFOUR,
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CIPHER_CHACHA20,
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CIPHER_MAX /* no. ciphers (inc warn) */
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};
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enum TriState {
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/*
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* Several different bits of the PuTTY configuration seem to be
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* three-way settings whose values are `always yes', `always
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* no', and `decide by some more complex automated means'. This
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* is true of line discipline options (local echo and line
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* editing), proxy DNS, proxy terminal logging, Close On Exit, and
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* SSH server bug workarounds. Accordingly I supply a single enum
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* here to deal with them all.
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*/
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FORCE_ON, FORCE_OFF, AUTO
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};
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enum {
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/*
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* Proxy types.
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*/
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PROXY_NONE, PROXY_SOCKS4, PROXY_SOCKS5,
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PROXY_HTTP, PROXY_TELNET, PROXY_CMD, PROXY_FUZZ
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};
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enum {
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/*
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* Line discipline options which the backend might try to control.
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*/
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LD_EDIT, /* local line editing */
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LD_ECHO, /* local echo */
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LD_N_OPTIONS
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};
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enum {
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/* Actions on remote window title query */
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TITLE_NONE, TITLE_EMPTY, TITLE_REAL
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};
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enum {
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/* Protocol back ends. (CONF_protocol) */
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PROT_RAW, PROT_TELNET, PROT_RLOGIN, PROT_SSH,
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/* PROT_SERIAL is supported on a subset of platforms, but it doesn't
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* hurt to define it globally. */
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PROT_SERIAL
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};
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enum {
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/* Bell settings (CONF_beep) */
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BELL_DISABLED, BELL_DEFAULT, BELL_VISUAL, BELL_WAVEFILE, BELL_PCSPEAKER
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};
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enum {
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/* Taskbar flashing indication on bell (CONF_beep_ind) */
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B_IND_DISABLED, B_IND_FLASH, B_IND_STEADY
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};
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enum {
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/* Resize actions (CONF_resize_action) */
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RESIZE_TERM, RESIZE_DISABLED, RESIZE_FONT, RESIZE_EITHER
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};
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enum {
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/* Function key types (CONF_funky_type) */
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FUNKY_TILDE,
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FUNKY_LINUX,
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FUNKY_XTERM,
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FUNKY_VT400,
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FUNKY_VT100P,
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FUNKY_SCO
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};
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enum {
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FQ_DEFAULT, FQ_ANTIALIASED, FQ_NONANTIALIASED, FQ_CLEARTYPE
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};
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enum {
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SER_PAR_NONE, SER_PAR_ODD, SER_PAR_EVEN, SER_PAR_MARK, SER_PAR_SPACE
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};
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enum {
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SER_FLOW_NONE, SER_FLOW_XONXOFF, SER_FLOW_RTSCTS, SER_FLOW_DSRDTR
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};
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/*
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* Tables of string <-> enum value mappings used in settings.c.
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* Defined here so that backends can export their GSS library tables
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* to the cross-platform settings code.
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*/
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struct keyvalwhere {
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/*
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* Two fields which define a string and enum value to be
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* equivalent to each other.
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*/
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const char *s;
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int v;
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/*
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* The next pair of fields are used by gprefs() in settings.c to
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* arrange that when it reads a list of strings representing a
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* preference list and translates it into the corresponding list
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* of integers, strings not appearing in the list are entered in a
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* configurable position rather than uniformly at the end.
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*/
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/*
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* 'vrel' indicates which other value in the list to place this
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* element relative to. It should be a value that has occurred in
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* a 'v' field of some other element of the array, or -1 to
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* indicate that we simply place relative to one or other end of
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* the list.
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*
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* gprefs will try to process the elements in an order which makes
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* this field work (i.e. so that the element referenced has been
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* added before processing this one).
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*/
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int vrel;
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/*
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* 'where' indicates whether to place the new value before or
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* after the one referred to by vrel. -1 means before; +1 means
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* after.
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*
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* When vrel is -1, this also implicitly indicates which end of
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* the array to use. So vrel=-1, where=-1 means to place _before_
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* some end of the list (hence, at the last element); vrel=-1,
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* where=+1 means to place _after_ an end (hence, at the first).
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*/
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int where;
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};
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#ifndef NO_GSSAPI
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extern const int ngsslibs;
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extern const char *const gsslibnames[]; /* for displaying in configuration */
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extern const struct keyvalwhere gsslibkeywords[]; /* for settings.c */
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#endif
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extern const char *const ttymodes[];
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enum {
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/*
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* Network address types. Used for specifying choice of IPv4/v6
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* in config; also used in proxy.c to indicate whether a given
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* host name has already been resolved or will be resolved at
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* the proxy end.
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*/
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ADDRTYPE_UNSPEC,
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ADDRTYPE_IPV4,
|
|
ADDRTYPE_IPV6,
|
|
ADDRTYPE_LOCAL, /* e.g. Unix domain socket, or Windows named pipe */
|
|
ADDRTYPE_NAME /* SockAddr storing an unresolved host name */
|
|
};
|
|
|
|
struct Backend {
|
|
const BackendVtable *vt;
|
|
};
|
|
struct BackendVtable {
|
|
const char *(*init) (Seat *seat, Backend **backend_out,
|
|
LogContext *logctx, Conf *conf,
|
|
const char *host, int port,
|
|
char **realhost, bool nodelay, bool keepalive);
|
|
|
|
void (*free) (Backend *be);
|
|
/* Pass in a replacement configuration. */
|
|
void (*reconfig) (Backend *be, Conf *conf);
|
|
/* send() returns the current amount of buffered data. */
|
|
size_t (*send) (Backend *be, const char *buf, size_t len);
|
|
/* sendbuffer() does the same thing but without attempting a send */
|
|
size_t (*sendbuffer) (Backend *be);
|
|
void (*size) (Backend *be, int width, int height);
|
|
void (*special) (Backend *be, SessionSpecialCode code, int arg);
|
|
const SessionSpecial *(*get_specials) (Backend *be);
|
|
bool (*connected) (Backend *be);
|
|
int (*exitcode) (Backend *be);
|
|
/* If back->sendok() returns false, the backend doesn't currently
|
|
* want input data, so the frontend should avoid acquiring any if
|
|
* possible (passing back-pressure on to its sender). */
|
|
bool (*sendok) (Backend *be);
|
|
bool (*ldisc_option_state) (Backend *be, int);
|
|
void (*provide_ldisc) (Backend *be, Ldisc *ldisc);
|
|
/* Tells the back end that the front end buffer is clearing. */
|
|
void (*unthrottle) (Backend *be, size_t bufsize);
|
|
int (*cfg_info) (Backend *be);
|
|
|
|
/* Only implemented in the SSH protocol: check whether a
|
|
* connection-sharing upstream exists for a given configuration. */
|
|
bool (*test_for_upstream)(const char *host, int port, Conf *conf);
|
|
|
|
const char *name;
|
|
int protocol;
|
|
int default_port;
|
|
};
|
|
|
|
static inline const char *backend_init(
|
|
const BackendVtable *vt, Seat *seat, Backend **out, LogContext *logctx,
|
|
Conf *conf, const char *host, int port, char **rhost, bool nd, bool ka)
|
|
{ return vt->init(seat, out, logctx, conf, host, port, rhost, nd, ka); }
|
|
static inline void backend_free(Backend *be)
|
|
{ be->vt->free(be); }
|
|
static inline void backend_reconfig(Backend *be, Conf *conf)
|
|
{ be->vt->reconfig(be, conf); }
|
|
static inline size_t backend_send(Backend *be, const char *buf, size_t len)
|
|
{ return be->vt->send(be, buf, len); }
|
|
static inline size_t backend_sendbuffer(Backend *be)
|
|
{ return be->vt->sendbuffer(be); }
|
|
static inline void backend_size(Backend *be, int width, int height)
|
|
{ be->vt->size(be, width, height); }
|
|
static inline void backend_special(
|
|
Backend *be, SessionSpecialCode code, int arg)
|
|
{ be->vt->special(be, code, arg); }
|
|
static inline const SessionSpecial *backend_get_specials(Backend *be)
|
|
{ return be->vt->get_specials(be); }
|
|
static inline bool backend_connected(Backend *be)
|
|
{ return be->vt->connected(be); }
|
|
static inline int backend_exitcode(Backend *be)
|
|
{ return be->vt->exitcode(be); }
|
|
static inline bool backend_sendok(Backend *be)
|
|
{ return be->vt->sendok(be); }
|
|
static inline bool backend_ldisc_option_state(Backend *be, int state)
|
|
{ return be->vt->ldisc_option_state(be, state); }
|
|
static inline void backend_provide_ldisc(Backend *be, Ldisc *ldisc)
|
|
{ be->vt->provide_ldisc(be, ldisc); }
|
|
static inline void backend_unthrottle(Backend *be, size_t bufsize)
|
|
{ be->vt->unthrottle(be, bufsize); }
|
|
static inline int backend_cfg_info(Backend *be)
|
|
{ return be->vt->cfg_info(be); }
|
|
|
|
extern const struct BackendVtable *const 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_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_INTERACTIVE 0x0002
|
|
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 bool loaded_session;
|
|
/*
|
|
* This is set to the name of the loaded session.
|
|
*/
|
|
GLOBAL char *cmdline_session_name;
|
|
|
|
/*
|
|
* 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;
|
|
bool 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).
|
|
*/
|
|
bool to_server;
|
|
|
|
/*
|
|
* Indicates whether the prompts originated _at_ the server, so
|
|
* that the front end can display some kind of trust sigil that
|
|
* distinguishes (say) a legit private-key passphrase prompt from
|
|
* a fake one sent by a malicious server.
|
|
*/
|
|
bool from_server;
|
|
|
|
char *name; /* Short description, perhaps for dialog box title */
|
|
bool name_reqd; /* Display of `name' required or optional? */
|
|
char *instruction; /* Long description, maybe with embedded newlines */
|
|
bool 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) */
|
|
size_t prompts_size; /* allocated storage capacity for prompts[] */
|
|
prompt_t **prompts;
|
|
void *data; /* slot for housekeeping data, managed by
|
|
* seat_get_userpass_input(); initially NULL */
|
|
} prompts_t;
|
|
prompts_t *new_prompts();
|
|
void add_prompt(prompts_t *p, char *promptstr, bool 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 {
|
|
bool 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
|
|
|
|
/* Hint from backend to frontend about time-consuming operations, used
|
|
* by seat_set_busy_status. Initial state is assumed to be
|
|
* BUSY_NOT. */
|
|
typedef enum BusyStatus {
|
|
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 */
|
|
} BusyStatus;
|
|
|
|
typedef enum SeatInteractionContext {
|
|
SIC_BANNER, SIC_KI_PROMPTS
|
|
} SeatInteractionContext;
|
|
|
|
/*
|
|
* Data type 'Seat', which is an API intended to contain essentially
|
|
* everything that a back end might need to talk to its client for:
|
|
* session output, password prompts, SSH warnings about host keys and
|
|
* weak cryptography, notifications of events like the remote process
|
|
* exiting or the GUI specials menu needing an update.
|
|
*/
|
|
struct Seat {
|
|
const struct SeatVtable *vt;
|
|
};
|
|
struct SeatVtable {
|
|
/*
|
|
* Provide output from the remote session. 'is_stderr' indicates
|
|
* that the output should be sent to a separate error message
|
|
* channel, if the seat has one. But combining both channels into
|
|
* one is OK too; that's what terminal-window based seats do.
|
|
*
|
|
* The return value is the current size of the output backlog.
|
|
*/
|
|
size_t (*output)(Seat *seat, bool is_stderr, const void *data, size_t 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.
|
|
*/
|
|
bool (*eof)(Seat *seat);
|
|
|
|
/*
|
|
* Try to get answers from a set of interactive login prompts. The
|
|
* prompts are provided in 'p'; the bufchain 'input' holds the
|
|
* data currently outstanding in the session's normal standard-
|
|
* input channel. Seats may implement this function by consuming
|
|
* data from 'input' (e.g. password prompts in GUI PuTTY,
|
|
* displayed in the same terminal as the subsequent session), or
|
|
* by doing something entirely different (e.g. directly
|
|
* interacting with standard I/O, or putting up a dialog box).
|
|
*
|
|
* A positive return value means that all prompts have had answers
|
|
* filled in. A zero return means that the user performed a
|
|
* deliberate 'cancel' UI action. A negative return means that no
|
|
* answer can be given yet but please try again later.
|
|
*
|
|
* (FIXME: it would be nice to distinguish two classes of cancel
|
|
* action, so the user could specify 'I want to abandon this
|
|
* entire attempt to start a session' or the milder 'I want to
|
|
* abandon this particular form of authentication and fall back to
|
|
* a different one' - e.g. if you turn out not to be able to
|
|
* remember your private key passphrase then perhaps you'd rather
|
|
* fall back to password auth rather than aborting the whole
|
|
* session.)
|
|
*
|
|
* (Also FIXME: currently, backends' only response to the 'try
|
|
* again later' is to try again when more input data becomes
|
|
* available, because they assume that a seat is returning that
|
|
* value because it's consuming keyboard input. But a seat that
|
|
* handled this function by putting up a dialog box might want to
|
|
* put it up non-modally, and therefore would want to proactively
|
|
* notify the backend to retry once the dialog went away. So if I
|
|
* ever do want to move password prompts into a dialog box, I'll
|
|
* want a backend method for sending that notification.)
|
|
*/
|
|
int (*get_userpass_input)(Seat *seat, prompts_t *p, bufchain *input);
|
|
|
|
/*
|
|
* Notify the seat that the process running at the other end of
|
|
* the connection has finished.
|
|
*/
|
|
void (*notify_remote_exit)(Seat *seat);
|
|
|
|
/*
|
|
* Notify the seat that the connection has suffered a fatal error.
|
|
*/
|
|
void (*connection_fatal)(Seat *seat, const char *message);
|
|
|
|
/*
|
|
* Notify the seat that the list of special commands available
|
|
* from backend_get_specials() has changed, so that it might want
|
|
* to call that function to repopulate its menu.
|
|
*
|
|
* Seats are not expected to call backend_get_specials()
|
|
* proactively; they may start by assuming that the backend
|
|
* provides no special commands at all, so if the backend does
|
|
* provide any, then it should use this notification at startup
|
|
* time. Of course 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)(Seat *seat);
|
|
|
|
/*
|
|
* Get the seat's preferred value for an SSH terminal mode
|
|
* setting. Returning NULL indicates no preference (i.e. the SSH
|
|
* connection will not attempt to set the mode at all).
|
|
*
|
|
* The returned value is dynamically allocated, and the caller
|
|
* should free it.
|
|
*/
|
|
char *(*get_ttymode)(Seat *seat, const char *mode);
|
|
|
|
/*
|
|
* Tell the seat whether the backend is currently doing anything
|
|
* CPU-intensive (typically a cryptographic key exchange). See
|
|
* BusyStatus enumeration above.
|
|
*/
|
|
void (*set_busy_status)(Seat *seat, BusyStatus status);
|
|
|
|
/*
|
|
* Ask the seat whether a given SSH host key should be accepted.
|
|
* This may return immediately after checking saved configuration
|
|
* or command-line options, or it may have to present a prompt to
|
|
* the user and return asynchronously later.
|
|
*
|
|
* Return 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)(
|
|
Seat *seat, const char *host, int port,
|
|
const char *keytype, char *keystr, char *key_fingerprint,
|
|
void (*callback)(void *ctx, int result), void *ctx);
|
|
|
|
/*
|
|
* Check with the seat whether it's OK to use a cryptographic
|
|
* primitive from below the 'warn below this line' threshold in
|
|
* the input Conf. Return values are the same as
|
|
* verify_ssh_host_key above.
|
|
*/
|
|
int (*confirm_weak_crypto_primitive)(
|
|
Seat *seat, const char *algtype, const char *algname,
|
|
void (*callback)(void *ctx, int result), void *ctx);
|
|
|
|
/*
|
|
* Variant form of confirm_weak_crypto_primitive, which prints a
|
|
* slightly different message but otherwise has the same
|
|
* semantics.
|
|
*
|
|
* This form is used in the case where we're using a host key
|
|
* below the warning threshold because that's the best one we have
|
|
* cached, but at least one host key algorithm *above* the
|
|
* threshold is available that we don't have cached. 'betteralgs'
|
|
* lists the better algorithm(s).
|
|
*/
|
|
int (*confirm_weak_cached_hostkey)(
|
|
Seat *seat, const char *algname, const char *betteralgs,
|
|
void (*callback)(void *ctx, int result), void *ctx);
|
|
|
|
/*
|
|
* Indicates whether the seat is expecting to interact with the
|
|
* user in the UTF-8 character set. (Affects e.g. visual erase
|
|
* handling in local line editing.)
|
|
*/
|
|
bool (*is_utf8)(Seat *seat);
|
|
|
|
/*
|
|
* Notify the seat that the back end, and/or the ldisc between
|
|
* them, have changed their idea of whether they currently want
|
|
* local echo and/or local line editing enabled.
|
|
*/
|
|
void (*echoedit_update)(Seat *seat, bool echoing, bool editing);
|
|
|
|
/*
|
|
* Return the local X display string relevant to a seat, or NULL
|
|
* if there isn't one or if the concept is meaningless.
|
|
*/
|
|
const char *(*get_x_display)(Seat *seat);
|
|
|
|
/*
|
|
* Return the X11 id of the X terminal window relevant to a seat,
|
|
* by returning true and filling in the output pointer. Return
|
|
* false if there isn't one or if the concept is meaningless.
|
|
*/
|
|
bool (*get_windowid)(Seat *seat, long *id_out);
|
|
|
|
/*
|
|
* Return the size of the terminal window in pixels. If the
|
|
* concept is meaningless or the information is unavailable,
|
|
* return false; otherwise fill in the output pointers and return
|
|
* true.
|
|
*/
|
|
bool (*get_window_pixel_size)(Seat *seat, int *width, int *height);
|
|
|
|
/*
|
|
* Return a StripCtrlChars appropriate for sanitising untrusted
|
|
* terminal data (e.g. SSH banners, prompts) being sent to the
|
|
* user of this seat. May return NULL if no sanitisation is
|
|
* needed.
|
|
*/
|
|
StripCtrlChars *(*stripctrl_new)(
|
|
Seat *seat, BinarySink *bs_out, SeatInteractionContext sic);
|
|
|
|
/*
|
|
* Set the seat's current idea of where output is coming from.
|
|
* True means that output is being generated by our own code base
|
|
* (and hence, can be trusted if it's asking you for secrets such
|
|
* as your passphrase); false means output is coming from the
|
|
* server.
|
|
*
|
|
* Returns true if the seat has a way to indicate this
|
|
* distinction. Returns false if not, in which case the backend
|
|
* should use a fallback defence against spoofing of PuTTY's local
|
|
* prompts by malicious servers.
|
|
*/
|
|
bool (*set_trust_status)(Seat *seat, bool trusted);
|
|
};
|
|
|
|
static inline size_t seat_output(
|
|
Seat *seat, bool err, const void *data, size_t len)
|
|
{ return seat->vt->output(seat, err, data, len); }
|
|
static inline bool seat_eof(Seat *seat)
|
|
{ return seat->vt->eof(seat); }
|
|
static inline int seat_get_userpass_input(
|
|
Seat *seat, prompts_t *p, bufchain *input)
|
|
{ return seat->vt->get_userpass_input(seat, p, input); }
|
|
static inline void seat_notify_remote_exit(Seat *seat)
|
|
{ seat->vt->notify_remote_exit(seat); }
|
|
static inline void seat_update_specials_menu(Seat *seat)
|
|
{ seat->vt->update_specials_menu(seat); }
|
|
static inline char *seat_get_ttymode(Seat *seat, const char *mode)
|
|
{ return seat->vt->get_ttymode(seat, mode); }
|
|
static inline void seat_set_busy_status(Seat *seat, BusyStatus status)
|
|
{ seat->vt->set_busy_status(seat, status); }
|
|
static inline int seat_verify_ssh_host_key(
|
|
Seat *seat, const char *h, int p, const char *ktyp, char *kstr,
|
|
char *fp, void (*cb)(void *ctx, int result), void *ctx)
|
|
{ return seat->vt->verify_ssh_host_key(seat, h, p, ktyp, kstr, fp, cb, ctx); }
|
|
static inline int seat_confirm_weak_crypto_primitive(
|
|
Seat *seat, const char *atyp, const char *aname,
|
|
void (*cb)(void *ctx, int result), void *ctx)
|
|
{ return seat->vt->confirm_weak_crypto_primitive(seat, atyp, aname, cb, ctx); }
|
|
static inline int seat_confirm_weak_cached_hostkey(
|
|
Seat *seat, const char *aname, const char *better,
|
|
void (*cb)(void *ctx, int result), void *ctx)
|
|
{ return seat->vt->confirm_weak_cached_hostkey(seat, aname, better, cb, ctx); }
|
|
static inline bool seat_is_utf8(Seat *seat)
|
|
{ return seat->vt->is_utf8(seat); }
|
|
static inline void seat_echoedit_update(Seat *seat, bool ec, bool ed)
|
|
{ seat->vt->echoedit_update(seat, ec, ed); }
|
|
static inline const char *seat_get_x_display(Seat *seat)
|
|
{ return seat->vt->get_x_display(seat); }
|
|
static inline bool seat_get_windowid(Seat *seat, long *id_out)
|
|
{ return seat->vt->get_windowid(seat, id_out); }
|
|
static inline bool seat_get_window_pixel_size(Seat *seat, int *w, int *h)
|
|
{ return seat->vt->get_window_pixel_size(seat, w, h); }
|
|
static inline StripCtrlChars *seat_stripctrl_new(
|
|
Seat *seat, BinarySink *bs, SeatInteractionContext sic)
|
|
{ return seat->vt->stripctrl_new(seat, bs, sic); }
|
|
static inline bool seat_set_trust_status(Seat *seat, bool trusted)
|
|
{ return seat->vt->set_trust_status(seat, trusted); }
|
|
|
|
/* Unlike the seat's actual method, the public entry point
|
|
* seat_connection_fatal is a wrapper function with a printf-like API,
|
|
* defined in misc.c. */
|
|
void seat_connection_fatal(Seat *seat, const char *fmt, ...);
|
|
|
|
/* Handy aliases for seat_output which set is_stderr to a fixed value. */
|
|
static inline size_t seat_stdout(Seat *seat, const void *data, size_t len)
|
|
{ return seat_output(seat, false, data, len); }
|
|
static inline size_t seat_stdout_pl(Seat *seat, ptrlen data)
|
|
{ return seat_output(seat, false, data.ptr, data.len); }
|
|
static inline size_t seat_stderr(Seat *seat, const void *data, size_t len)
|
|
{ return seat_output(seat, true, data, len); }
|
|
static inline size_t seat_stderr_pl(Seat *seat, ptrlen data)
|
|
{ return seat_output(seat, true, data.ptr, data.len); }
|
|
|
|
/*
|
|
* Stub methods for seat implementations that want to use the obvious
|
|
* null handling for a given method.
|
|
*
|
|
* These are generally obvious, except for is_utf8, where you might
|
|
* plausibly want to return either fixed answer 'no' or 'yes'.
|
|
*/
|
|
size_t nullseat_output(
|
|
Seat *seat, bool is_stderr, const void *data, size_t len);
|
|
bool nullseat_eof(Seat *seat);
|
|
int nullseat_get_userpass_input(Seat *seat, prompts_t *p, bufchain *input);
|
|
void nullseat_notify_remote_exit(Seat *seat);
|
|
void nullseat_connection_fatal(Seat *seat, const char *message);
|
|
void nullseat_update_specials_menu(Seat *seat);
|
|
char *nullseat_get_ttymode(Seat *seat, const char *mode);
|
|
void nullseat_set_busy_status(Seat *seat, BusyStatus status);
|
|
int nullseat_verify_ssh_host_key(
|
|
Seat *seat, const char *host, int port,
|
|
const char *keytype, char *keystr, char *key_fingerprint,
|
|
void (*callback)(void *ctx, int result), void *ctx);
|
|
int nullseat_confirm_weak_crypto_primitive(
|
|
Seat *seat, const char *algtype, const char *algname,
|
|
void (*callback)(void *ctx, int result), void *ctx);
|
|
int nullseat_confirm_weak_cached_hostkey(
|
|
Seat *seat, const char *algname, const char *betteralgs,
|
|
void (*callback)(void *ctx, int result), void *ctx);
|
|
bool nullseat_is_never_utf8(Seat *seat);
|
|
bool nullseat_is_always_utf8(Seat *seat);
|
|
void nullseat_echoedit_update(Seat *seat, bool echoing, bool editing);
|
|
const char *nullseat_get_x_display(Seat *seat);
|
|
bool nullseat_get_windowid(Seat *seat, long *id_out);
|
|
bool nullseat_get_window_pixel_size(Seat *seat, int *width, int *height);
|
|
StripCtrlChars *nullseat_stripctrl_new(
|
|
Seat *seat, BinarySink *bs_out, SeatInteractionContext sic);
|
|
bool nullseat_set_trust_status(Seat *seat, bool trusted);
|
|
bool nullseat_set_trust_status_vacuously(Seat *seat, bool trusted);
|
|
|
|
/*
|
|
* Seat functions provided by the platform's console-application
|
|
* support module (wincons.c, uxcons.c).
|
|
*/
|
|
|
|
void console_connection_fatal(Seat *seat, const char *message);
|
|
int console_verify_ssh_host_key(
|
|
Seat *seat, const char *host, int port,
|
|
const char *keytype, char *keystr, char *key_fingerprint,
|
|
void (*callback)(void *ctx, int result), void *ctx);
|
|
int console_confirm_weak_crypto_primitive(
|
|
Seat *seat, const char *algtype, const char *algname,
|
|
void (*callback)(void *ctx, int result), void *ctx);
|
|
int console_confirm_weak_cached_hostkey(
|
|
Seat *seat, const char *algname, const char *betteralgs,
|
|
void (*callback)(void *ctx, int result), void *ctx);
|
|
StripCtrlChars *console_stripctrl_new(
|
|
Seat *seat, BinarySink *bs_out, SeatInteractionContext sic);
|
|
bool console_set_trust_status(Seat *seat, bool trusted);
|
|
|
|
/*
|
|
* Other centralised seat functions.
|
|
*/
|
|
int filexfer_get_userpass_input(Seat *seat, prompts_t *p, bufchain *input);
|
|
|
|
/*
|
|
* Data type 'TermWin', which is a vtable encapsulating all the
|
|
* functionality that Terminal expects from its containing terminal
|
|
* window.
|
|
*/
|
|
struct TermWin {
|
|
const struct TermWinVtable *vt;
|
|
};
|
|
struct TermWinVtable {
|
|
/*
|
|
* All functions listed here between setup_draw_ctx and
|
|
* free_draw_ctx expect to be _called_ between them too, so that
|
|
* the TermWin has a drawing context currently available.
|
|
*
|
|
* (Yes, even char_width, because e.g. the Windows implementation
|
|
* of TermWin handles it by loading the currently configured font
|
|
* into the HDC and doing a GDI query.)
|
|
*/
|
|
bool (*setup_draw_ctx)(TermWin *);
|
|
/* Draw text in the window, during a painting operation */
|
|
void (*draw_text)(TermWin *, int x, int y, wchar_t *text, int len,
|
|
unsigned long attrs, int line_attrs, truecolour tc);
|
|
/* Draw the visible cursor. Expects you to have called do_text
|
|
* first (because it might just draw an underline over a character
|
|
* presumed to exist already), but also expects you to pass in all
|
|
* the details of the character under the cursor (because it might
|
|
* redraw it in different colours). */
|
|
void (*draw_cursor)(TermWin *, int x, int y, wchar_t *text, int len,
|
|
unsigned long attrs, int line_attrs, truecolour tc);
|
|
/* Draw the sigil indicating that a line of text has come from
|
|
* PuTTY itself rather than the far end (defence against end-of-
|
|
* authentication spoofing) */
|
|
void (*draw_trust_sigil)(TermWin *, int x, int y);
|
|
int (*char_width)(TermWin *, int uc);
|
|
void (*free_draw_ctx)(TermWin *);
|
|
|
|
void (*set_cursor_pos)(TermWin *, int x, int y);
|
|
|
|
void (*set_raw_mouse_mode)(TermWin *, bool enable);
|
|
|
|
void (*set_scrollbar)(TermWin *, int total, int start, int page);
|
|
|
|
void (*bell)(TermWin *, int mode);
|
|
|
|
void (*clip_write)(TermWin *, int clipboard, wchar_t *text, int *attrs,
|
|
truecolour *colours, int len, bool must_deselect);
|
|
void (*clip_request_paste)(TermWin *, int clipboard);
|
|
|
|
void (*refresh)(TermWin *);
|
|
|
|
void (*request_resize)(TermWin *, int w, int h);
|
|
|
|
void (*set_title)(TermWin *, const char *title);
|
|
void (*set_icon_title)(TermWin *, const char *icontitle);
|
|
/* set_minimised and set_maximised are assumed to set two
|
|
* independent settings, rather than a single three-way
|
|
* {min,normal,max} switch. The idea is that when you un-minimise
|
|
* the window it remembers whether to go back to normal or
|
|
* maximised. */
|
|
void (*set_minimised)(TermWin *, bool minimised);
|
|
bool (*is_minimised)(TermWin *);
|
|
void (*set_maximised)(TermWin *, bool maximised);
|
|
void (*move)(TermWin *, int x, int y);
|
|
void (*set_zorder)(TermWin *, bool top);
|
|
|
|
bool (*palette_get)(TermWin *, int n, int *r, int *g, int *b);
|
|
void (*palette_set)(TermWin *, int n, int r, int g, int b);
|
|
void (*palette_reset)(TermWin *);
|
|
|
|
void (*get_pos)(TermWin *, int *x, int *y);
|
|
void (*get_pixels)(TermWin *, int *x, int *y);
|
|
const char *(*get_title)(TermWin *, bool icon);
|
|
bool (*is_utf8)(TermWin *);
|
|
};
|
|
|
|
static inline bool win_setup_draw_ctx(TermWin *win)
|
|
{ return win->vt->setup_draw_ctx(win); }
|
|
static inline void win_draw_text(
|
|
TermWin *win, int x, int y, wchar_t *text, int len,
|
|
unsigned long attrs, int line_attrs, truecolour tc)
|
|
{ win->vt->draw_text(win, x, y, text, len, attrs, line_attrs, tc); }
|
|
static inline void win_draw_cursor(
|
|
TermWin *win, int x, int y, wchar_t *text, int len,
|
|
unsigned long attrs, int line_attrs, truecolour tc)
|
|
{ win->vt->draw_cursor(win, x, y, text, len, attrs, line_attrs, tc); }
|
|
static inline void win_draw_trust_sigil(TermWin *win, int x, int y)
|
|
{ win->vt->draw_trust_sigil(win, x, y); }
|
|
static inline int win_char_width(TermWin *win, int uc)
|
|
{ return win->vt->char_width(win, uc); }
|
|
static inline void win_free_draw_ctx(TermWin *win)
|
|
{ win->vt->free_draw_ctx(win); }
|
|
static inline void win_set_cursor_pos(TermWin *win, int x, int y)
|
|
{ win->vt->set_cursor_pos(win, x, y); }
|
|
static inline void win_set_raw_mouse_mode(TermWin *win, bool enable)
|
|
{ win->vt->set_raw_mouse_mode(win, enable); }
|
|
static inline void win_set_scrollbar(TermWin *win, int t, int s, int p)
|
|
{ win->vt->set_scrollbar(win, t, s, p); }
|
|
static inline void win_bell(TermWin *win, int mode)
|
|
{ win->vt->bell(win, mode); }
|
|
static inline void win_clip_write(
|
|
TermWin *win, int clipboard, wchar_t *text, int *attrs,
|
|
truecolour *colours, int len, bool deselect)
|
|
{ win->vt->clip_write(win, clipboard, text, attrs, colours, len, deselect); }
|
|
static inline void win_clip_request_paste(TermWin *win, int clipboard)
|
|
{ win->vt->clip_request_paste(win, clipboard); }
|
|
static inline void win_refresh(TermWin *win)
|
|
{ win->vt->refresh(win); }
|
|
static inline void win_request_resize(TermWin *win, int w, int h)
|
|
{ win->vt->request_resize(win, w, h); }
|
|
static inline void win_set_title(TermWin *win, const char *title)
|
|
{ win->vt->set_title(win, title); }
|
|
static inline void win_set_icon_title(TermWin *win, const char *icontitle)
|
|
{ win->vt->set_icon_title(win, icontitle); }
|
|
static inline void win_set_minimised(TermWin *win, bool minimised)
|
|
{ win->vt->set_minimised(win, minimised); }
|
|
static inline bool win_is_minimised(TermWin *win)
|
|
{ return win->vt->is_minimised(win); }
|
|
static inline void win_set_maximised(TermWin *win, bool maximised)
|
|
{ win->vt->set_maximised(win, maximised); }
|
|
static inline void win_move(TermWin *win, int x, int y)
|
|
{ win->vt->move(win, x, y); }
|
|
static inline void win_set_zorder(TermWin *win, bool top)
|
|
{ win->vt->set_zorder(win, top); }
|
|
static inline bool win_palette_get(TermWin *win, int n, int *r, int *g, int *b)
|
|
{ return win->vt->palette_get(win, n, r, g, b); }
|
|
static inline void win_palette_set(TermWin *win, int n, int r, int g, int b)
|
|
{ win->vt->palette_set(win, n, r, g, b); }
|
|
static inline void win_palette_reset(TermWin *win)
|
|
{ win->vt->palette_reset(win); }
|
|
static inline void win_get_pos(TermWin *win, int *x, int *y)
|
|
{ win->vt->get_pos(win, x, y); }
|
|
static inline void win_get_pixels(TermWin *win, int *x, int *y)
|
|
{ win->vt->get_pixels(win, x, y); }
|
|
static inline const char *win_get_title(TermWin *win, bool icon)
|
|
{ return win->vt->get_title(win, icon); }
|
|
static inline bool win_is_utf8(TermWin *win)
|
|
{ return win->vt->is_utf8(win); }
|
|
|
|
/*
|
|
* Global functions not specific to a connection instance.
|
|
*/
|
|
void nonfatal(const char *, ...);
|
|
NORETURN void modalfatalbox(const char *, ...);
|
|
NORETURN 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) /* PROT_SSH, PROT_TELNET etc */ \
|
|
X(INT, NONE, addressfamily) /* ADDRTYPE_IPV[46] or ADDRTYPE_UNSPEC */ \
|
|
X(INT, NONE, close_on_exit) /* FORCE_ON, FORCE_OFF, AUTO */ \
|
|
X(BOOL, NONE, warn_on_close) \
|
|
X(INT, NONE, ping_interval) /* in seconds */ \
|
|
X(BOOL, NONE, tcp_nodelay) \
|
|
X(BOOL, 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) /* FORCE_ON, FORCE_OFF, AUTO */ \
|
|
X(BOOL, NONE, even_proxy_localhost) \
|
|
X(INT, NONE, proxy_type) /* PROXY_NONE, PROXY_SOCKS4, ... */ \
|
|
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) /* FORCE_ON, FORCE_OFF, AUTO */ \
|
|
/* SSH options */ \
|
|
X(STR, NONE, remote_cmd) \
|
|
X(STR, NONE, remote_cmd2) /* fallback if remote_cmd fails; never loaded or saved */ \
|
|
X(BOOL, NONE, nopty) \
|
|
X(BOOL, 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(BOOL, NONE, tryagent) \
|
|
X(BOOL, NONE, agentfwd) \
|
|
X(BOOL, 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(BOOL, NONE, ssh2_des_cbc) /* "des-cbc" unrecommended SSH-2 cipher */ \
|
|
X(BOOL, NONE, ssh_no_userauth) /* bypass "ssh-userauth" (SSH-2 only) */ \
|
|
X(BOOL, NONE, ssh_show_banner) /* show USERAUTH_BANNERs (SSH-2 only) */ \
|
|
X(BOOL, NONE, try_tis_auth) \
|
|
X(BOOL, NONE, try_ki_auth) \
|
|
X(BOOL, NONE, try_gssapi_auth) /* attempt gssapi auth via ssh userauth */ \
|
|
X(BOOL, NONE, try_gssapi_kex) /* attempt gssapi auth via ssh kex */ \
|
|
X(BOOL, NONE, gssapifwd) /* forward tgt via gss */ \
|
|
X(INT, NONE, gssapirekey) /* KEXGSS refresh interval (mins) */ \
|
|
X(INT, INT, ssh_gsslist) /* preference order for local GSS libs */ \
|
|
X(FILENAME, NONE, ssh_gss_custom) \
|
|
X(BOOL, NONE, ssh_subsys) /* run a subsystem rather than a command */ \
|
|
X(BOOL, NONE, ssh_subsys2) /* fallback to go with remote_cmd_ptr2 */ \
|
|
X(BOOL, 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(BOOL, NONE, username_from_env) \
|
|
X(STR, NONE, localusername) \
|
|
X(BOOL, NONE, rfc_environ) \
|
|
X(BOOL, 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) /* SER_PAR_NONE, SER_PAR_ODD, ... */ \
|
|
X(INT, NONE, serflow) /* SER_FLOW_NONE, SER_FLOW_XONXOFF, ... */ \
|
|
/* Keyboard options */ \
|
|
X(BOOL, NONE, bksp_is_delete) \
|
|
X(BOOL, NONE, rxvt_homeend) \
|
|
X(INT, NONE, funky_type) /* FUNKY_XTERM, FUNKY_LINUX, ... */ \
|
|
X(BOOL, NONE, no_applic_c) /* totally disable app cursor keys */ \
|
|
X(BOOL, NONE, no_applic_k) /* totally disable app keypad */ \
|
|
X(BOOL, NONE, no_mouse_rep) /* totally disable mouse reporting */ \
|
|
X(BOOL, NONE, no_remote_resize) /* disable remote resizing */ \
|
|
X(BOOL, NONE, no_alt_screen) /* disable alternate screen */ \
|
|
X(BOOL, NONE, no_remote_wintitle) /* disable remote retitling */ \
|
|
X(BOOL, NONE, no_remote_clearscroll) /* disable ESC[3J */ \
|
|
X(BOOL, NONE, no_dbackspace) /* disable destructive backspace */ \
|
|
X(BOOL, NONE, no_remote_charset) /* disable remote charset config */ \
|
|
X(INT, NONE, remote_qtitle_action) /* remote win title query action
|
|
* (TITLE_NONE, TITLE_EMPTY, ...) */ \
|
|
X(BOOL, NONE, app_cursor) \
|
|
X(BOOL, NONE, app_keypad) \
|
|
X(BOOL, NONE, nethack_keypad) \
|
|
X(BOOL, NONE, telnet_keyboard) \
|
|
X(BOOL, NONE, telnet_newline) \
|
|
X(BOOL, NONE, alt_f4) /* is it special? */ \
|
|
X(BOOL, NONE, alt_space) /* is it special? */ \
|
|
X(BOOL, NONE, alt_only) /* is it special? */ \
|
|
X(INT, NONE, localecho) /* FORCE_ON, FORCE_OFF, AUTO */ \
|
|
X(INT, NONE, localedit) /* FORCE_ON, FORCE_OFF, AUTO */ \
|
|
X(BOOL, NONE, alwaysontop) \
|
|
X(BOOL, NONE, fullscreenonaltenter) \
|
|
X(BOOL, NONE, scroll_on_key) \
|
|
X(BOOL, NONE, scroll_on_disp) \
|
|
X(BOOL, NONE, erase_to_scrollback) \
|
|
X(BOOL, NONE, compose_key) \
|
|
X(BOOL, NONE, ctrlaltkeys) \
|
|
X(BOOL, NONE, osx_option_meta) \
|
|
X(BOOL, NONE, osx_command_meta) \
|
|
X(STR, NONE, wintitle) /* initial window title */ \
|
|
/* Terminal options */ \
|
|
X(INT, NONE, savelines) \
|
|
X(BOOL, NONE, dec_om) \
|
|
X(BOOL, NONE, wrap_mode) \
|
|
X(BOOL, NONE, lfhascr) \
|
|
X(INT, NONE, cursor_type) /* 0=block 1=underline 2=vertical */ \
|
|
X(BOOL, NONE, blink_cur) \
|
|
X(INT, NONE, beep) /* BELL_DISABLED, BELL_DEFAULT, ... */ \
|
|
X(INT, NONE, beep_ind) /* B_IND_DISABLED, B_IND_FLASH, ... */ \
|
|
X(BOOL, 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(BOOL, NONE, scrollbar) \
|
|
X(BOOL, NONE, scrollbar_in_fullscreen) \
|
|
X(INT, NONE, resize_action) /* RESIZE_TERM, RESIZE_DISABLED, ... */ \
|
|
X(BOOL, NONE, bce) \
|
|
X(BOOL, NONE, blinktext) \
|
|
X(BOOL, NONE, win_name_always) \
|
|
X(INT, NONE, width) \
|
|
X(INT, NONE, height) \
|
|
X(FONT, NONE, font) \
|
|
X(INT, NONE, font_quality) /* FQ_DEFAULT, FQ_ANTIALIASED, ... */ \
|
|
X(FILENAME, NONE, logfilename) \
|
|
X(INT, NONE, logtype) /* LGTYP_NONE, LGTYPE_ASCII, ... */ \
|
|
X(INT, NONE, logxfovr) /* LGXF_OVR, LGXF_APN, LGXF_ASK */ \
|
|
X(BOOL, NONE, logflush) \
|
|
X(BOOL, NONE, logheader) \
|
|
X(BOOL, NONE, logomitpass) \
|
|
X(BOOL, NONE, logomitdata) \
|
|
X(BOOL, NONE, hide_mouseptr) \
|
|
X(BOOL, NONE, sunken_edge) \
|
|
X(INT, NONE, window_border) /* in pixels */ \
|
|
X(STR, NONE, answerback) \
|
|
X(STR, NONE, printer) \
|
|
X(BOOL, NONE, arabicshaping) \
|
|
X(BOOL, NONE, bidi) \
|
|
/* Colour options */ \
|
|
X(BOOL, NONE, ansi_colour) \
|
|
X(BOOL, NONE, xterm_256_colour) \
|
|
X(BOOL, NONE, true_colour) \
|
|
X(BOOL, NONE, system_colour) \
|
|
X(BOOL, NONE, try_palette) \
|
|
X(INT, NONE, bold_style) /* 1=font 2=colour (3=both) */ \
|
|
X(INT, INT, colours) \
|
|
/* Selection options */ \
|
|
X(INT, NONE, mouse_is_xterm) /* 0=compromise 1=xterm 2=Windows */ \
|
|
X(BOOL, NONE, rect_select) \
|
|
X(BOOL, NONE, paste_controls) \
|
|
X(BOOL, NONE, rawcnp) \
|
|
X(BOOL, NONE, utf8linedraw) \
|
|
X(BOOL, NONE, rtf_paste) \
|
|
X(BOOL, NONE, mouse_override) \
|
|
X(INT, INT, wordness) \
|
|
X(BOOL, NONE, mouseautocopy) \
|
|
X(INT, NONE, mousepaste) /* CLIPUI_IMPLICIT, CLIPUI_EXPLICIT, ... */ \
|
|
X(INT, NONE, ctrlshiftins) /* CLIPUI_IMPLICIT, CLIPUI_EXPLICIT, ... */ \
|
|
X(INT, NONE, ctrlshiftcv) /* CLIPUI_IMPLICIT, CLIPUI_EXPLICIT, ... */ \
|
|
X(STR, NONE, mousepaste_custom) \
|
|
X(STR, NONE, ctrlshiftins_custom) \
|
|
X(STR, NONE, ctrlshiftcv_custom) \
|
|
/* translations */ \
|
|
X(INT, NONE, vtmode) /* VT_XWINDOWS, VT_OEMANSI, ... */ \
|
|
X(STR, NONE, line_codepage) \
|
|
X(BOOL, NONE, cjk_ambig_wide) \
|
|
X(BOOL, NONE, utf8_override) \
|
|
X(BOOL, NONE, xlat_capslockcyr) \
|
|
/* X11 forwarding */ \
|
|
X(BOOL, NONE, x11_forward) \
|
|
X(STR, NONE, x11_display) \
|
|
X(INT, NONE, x11_auth) /* X11_NO_AUTH, X11_MIT, X11_XDM */ \
|
|
X(FILENAME, NONE, xauthfile) \
|
|
/* port forwarding */ \
|
|
X(BOOL, NONE, lport_acceptall) /* accept conns from hosts other than localhost */ \
|
|
X(BOOL, 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. All FORCE_ON/FORCE_OFF/AUTO */ \
|
|
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(BOOL, NONE, ssh_simple) \
|
|
X(BOOL, NONE, ssh_connection_sharing) \
|
|
X(BOOL, NONE, ssh_connection_sharing_upstream) \
|
|
X(BOOL, 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(BOOL, NONE, stamp_utmp) \
|
|
X(BOOL, NONE, login_shell) \
|
|
X(BOOL, NONE, scrollbar_on_left) \
|
|
X(BOOL, NONE, shadowbold) \
|
|
X(FONT, NONE, boldfont) \
|
|
X(FONT, NONE, widefont) \
|
|
X(FONT, NONE, wideboldfont) \
|
|
X(INT, NONE, shadowboldoffset) /* in pixels */ \
|
|
X(BOOL, NONE, crhaslf) \
|
|
X(STR, NONE, winclass) \
|
|
/* end of list */
|
|
|
|
/* 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. */
|
|
bool conf_get_bool(Conf *conf, int key);
|
|
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_bool(Conf *conf, int key, bool value);
|
|
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 */
|
|
void conf_serialise(BinarySink *bs, Conf *conf);
|
|
bool conf_deserialise(Conf *conf, BinarySource *src);/*returns true on success*/
|
|
|
|
/*
|
|
* 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);
|
|
void fontspec_serialise(BinarySink *bs, FontSpec *f);
|
|
FontSpec *fontspec_deserialise(BinarySource *src);
|
|
|
|
/*
|
|
* Exports from noise.c.
|
|
*/
|
|
typedef enum NoiseSourceId {
|
|
NOISE_SOURCE_TIME,
|
|
NOISE_SOURCE_IOID,
|
|
NOISE_SOURCE_IOLEN,
|
|
NOISE_SOURCE_KEY,
|
|
NOISE_SOURCE_MOUSEBUTTON,
|
|
NOISE_SOURCE_MOUSEPOS,
|
|
NOISE_SOURCE_MEMINFO,
|
|
NOISE_SOURCE_STAT,
|
|
NOISE_SOURCE_RUSAGE,
|
|
NOISE_SOURCE_FGWINDOW,
|
|
NOISE_SOURCE_CAPTURE,
|
|
NOISE_SOURCE_CLIPBOARD,
|
|
NOISE_SOURCE_QUEUE,
|
|
NOISE_SOURCE_CURSORPOS,
|
|
NOISE_SOURCE_THREADTIME,
|
|
NOISE_SOURCE_PROCTIME,
|
|
NOISE_SOURCE_PERFCOUNT,
|
|
NOISE_MAX_SOURCES
|
|
} NoiseSourceId;
|
|
void noise_get_heavy(void (*func) (void *, int));
|
|
void noise_get_light(void (*func) (void *, int));
|
|
void noise_regular(void);
|
|
void noise_ultralight(NoiseSourceId id, unsigned long data);
|
|
void random_save_seed(void);
|
|
void random_destroy_seed(void);
|
|
|
|
/*
|
|
* Exports from settings.c.
|
|
*
|
|
* load_settings() and do_defaults() return false if the provided
|
|
* session name didn't actually exist. But they still fill in the
|
|
* provided Conf with _something_.
|
|
*/
|
|
const struct BackendVtable *backend_vt_from_name(const char *name);
|
|
const struct BackendVtable *backend_vt_from_proto(int proto);
|
|
char *get_remote_username(Conf *conf); /* dynamically allocated */
|
|
char *save_settings(const char *section, Conf *conf);
|
|
void save_open_settings(settings_w *sesskey, Conf *conf);
|
|
bool load_settings(const char *section, Conf *conf);
|
|
void load_open_settings(settings_r *sesskey, Conf *conf);
|
|
void get_sesslist(struct sesslist *, bool allocate);
|
|
bool 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);
|
|
bool platform_default_b(const char *name, bool def);
|
|
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 *, TermWin *);
|
|
void term_free(Terminal *);
|
|
void term_size(Terminal *, int, int, int);
|
|
void term_paint(Terminal *, int, int, int, int, bool);
|
|
void term_scroll(Terminal *, int, int);
|
|
void term_scroll_to_selection(Terminal *, int);
|
|
void term_pwron(Terminal *, bool);
|
|
void term_clrsb(Terminal *);
|
|
void term_mouse(Terminal *, Mouse_Button, Mouse_Button, Mouse_Action,
|
|
int, int, bool, bool, bool);
|
|
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 *, bool set_cursor);
|
|
void term_do_paste(Terminal *, const wchar_t *, int);
|
|
void term_nopaste(Terminal *);
|
|
bool 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 *);
|
|
size_t term_data(Terminal *, bool is_stderr, const void *data, size_t len);
|
|
void term_provide_backend(Terminal *term, Backend *backend);
|
|
void term_provide_logctx(Terminal *term, LogContext *logctx);
|
|
void term_set_focus(Terminal *term, bool has_focus);
|
|
char *term_get_ttymode(Terminal *term, const char *mode);
|
|
int term_get_userpass_input(Terminal *term, prompts_t *p, bufchain *input);
|
|
void term_set_trust_status(Terminal *term, bool trusted);
|
|
|
|
typedef enum SmallKeypadKey {
|
|
SKK_HOME, SKK_END, SKK_INSERT, SKK_DELETE, SKK_PGUP, SKK_PGDN,
|
|
} SmallKeypadKey;
|
|
int format_arrow_key(char *buf, Terminal *term, int xkey, bool ctrl);
|
|
int format_function_key(char *buf, Terminal *term, int key_number,
|
|
bool shift, bool ctrl);
|
|
int format_small_keypad_key(char *buf, Terminal *term, SmallKeypadKey key);
|
|
int format_numeric_keypad_key(char *buf, Terminal *term, char key,
|
|
bool shift, bool ctrl);
|
|
|
|
/*
|
|
* Exports from logging.c.
|
|
*/
|
|
struct LogPolicyVtable {
|
|
/*
|
|
* Pass Event Log entries on from LogContext to the front end,
|
|
* which might write them to standard error or save them for a GUI
|
|
* list box or other things.
|
|
*/
|
|
void (*eventlog)(LogPolicy *lp, const char *event);
|
|
|
|
/*
|
|
* Ask what to do about the specified output log file already
|
|
* existing. 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, and callback() will be called with one
|
|
* of those options.
|
|
*/
|
|
int (*askappend)(LogPolicy *lp, Filename *filename,
|
|
void (*callback)(void *ctx, int result), void *ctx);
|
|
|
|
/*
|
|
* Emergency logging when the log file itself can't be opened,
|
|
* which typically means we want to shout about it more loudly
|
|
* than a mere Event Log entry.
|
|
*
|
|
* One reasonable option is to send it to the same place that
|
|
* stderr output from the main session goes (so, either a console
|
|
* tool's actual stderr, or a terminal window). In many cases this
|
|
* is unlikely to cause this error message to turn up
|
|
* embarrassingly in a log file of real server output, because the
|
|
* whole point is that we haven't managed to open any such log
|
|
* file :-)
|
|
*/
|
|
void (*logging_error)(LogPolicy *lp, const char *event);
|
|
};
|
|
struct LogPolicy {
|
|
const LogPolicyVtable *vt;
|
|
};
|
|
|
|
static inline void lp_eventlog(LogPolicy *lp, const char *event)
|
|
{ lp->vt->eventlog(lp, event); }
|
|
static inline int lp_askappend(
|
|
LogPolicy *lp, Filename *filename,
|
|
void (*callback)(void *ctx, int result), void *ctx)
|
|
{ return lp->vt->askappend(lp, filename, callback, ctx); }
|
|
static inline void lp_logging_error(LogPolicy *lp, const char *event)
|
|
{ lp->vt->logging_error(lp, event); }
|
|
|
|
LogContext *log_init(LogPolicy *lp, Conf *conf);
|
|
void log_free(LogContext *logctx);
|
|
void log_reconfig(LogContext *logctx, Conf *conf);
|
|
void logfopen(LogContext *logctx);
|
|
void logfclose(LogContext *logctx);
|
|
void logtraffic(LogContext *logctx, unsigned char c, int logmode);
|
|
void logflush(LogContext *logctx);
|
|
void logevent(LogContext *logctx, const char *event);
|
|
void logeventf(LogContext *logctx, const char *fmt, ...);
|
|
void logeventvf(LogContext *logctx, const char *fmt, va_list ap);
|
|
|
|
/*
|
|
* Pass a dynamically allocated string to logevent and immediately
|
|
* free it. Intended for use by wrapper macros which pass the return
|
|
* value of dupprintf straight to this.
|
|
*/
|
|
void logevent_and_free(LogContext *logctx, char *event);
|
|
enum { PKT_INCOMING, PKT_OUTGOING };
|
|
enum { PKTLOG_EMIT, PKTLOG_BLANK, PKTLOG_OMIT };
|
|
struct logblank_t {
|
|
int offset;
|
|
int len;
|
|
int type;
|
|
};
|
|
void log_packet(LogContext *logctx, int direction, int type,
|
|
const char *texttype, const void *data, size_t len,
|
|
int n_blanks, const struct logblank_t *blanks,
|
|
const unsigned long *sequence,
|
|
unsigned downstream_id, const char *additional_log_text);
|
|
|
|
/* This is defined by applications that have an obvious logging
|
|
* destination like standard error or the GUI. */
|
|
extern LogPolicy default_logpolicy[1];
|
|
|
|
/*
|
|
* Exports from testback.c
|
|
*/
|
|
|
|
extern const struct BackendVtable null_backend;
|
|
extern const struct BackendVtable loop_backend;
|
|
|
|
/*
|
|
* Exports from raw.c.
|
|
*/
|
|
|
|
extern const struct BackendVtable raw_backend;
|
|
|
|
/*
|
|
* Exports from rlogin.c.
|
|
*/
|
|
|
|
extern const struct BackendVtable rlogin_backend;
|
|
|
|
/*
|
|
* Exports from telnet.c.
|
|
*/
|
|
|
|
extern const struct BackendVtable telnet_backend;
|
|
|
|
/*
|
|
* Exports from ssh.c.
|
|
*/
|
|
extern const struct BackendVtable ssh_backend;
|
|
|
|
/*
|
|
* Exports from ldisc.c.
|
|
*/
|
|
Ldisc *ldisc_create(Conf *, Terminal *, Backend *, Seat *);
|
|
void ldisc_configure(Ldisc *, Conf *);
|
|
void ldisc_free(Ldisc *);
|
|
void ldisc_send(Ldisc *, const void *buf, int len, bool interactive);
|
|
void ldisc_echoedit_update(Ldisc *);
|
|
|
|
/*
|
|
* Exports from ldiscucs.c.
|
|
*/
|
|
void lpage_send(Ldisc *, int codepage, const char *buf, int len,
|
|
bool interactive);
|
|
void luni_send(Ldisc *, const wchar_t * widebuf, int len, bool interactive);
|
|
|
|
/*
|
|
* Exports from sshrand.c.
|
|
*/
|
|
|
|
void random_add_noise(NoiseSourceId source, const void *noise, int length);
|
|
void random_read(void *buf, size_t size);
|
|
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);
|
|
/* random_setup_special is used by PuTTYgen. It makes an extra-big
|
|
* random number generator. */
|
|
void random_setup_special();
|
|
/* Manually drop a random seed into the random number generator, e.g.
|
|
* just before generating a key. */
|
|
void random_reseed(ptrlen seed);
|
|
/* Limit on how much entropy is worth putting into the generator (bits). */
|
|
size_t random_seed_bits(void);
|
|
|
|
/*
|
|
* Exports from pinger.c.
|
|
*/
|
|
typedef struct Pinger Pinger;
|
|
Pinger *pinger_new(Conf *conf, Backend *backend);
|
|
void pinger_reconfig(Pinger *, Conf *oldconf, Conf *newconf);
|
|
void pinger_free(Pinger *);
|
|
|
|
/*
|
|
* Exports from misc.c.
|
|
*/
|
|
|
|
#include "misc.h"
|
|
bool 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, bool midsession,
|
|
int parity_mask, int flow_mask);
|
|
|
|
/*
|
|
* Exports from version.c.
|
|
*/
|
|
extern const char ver[];
|
|
extern const char commitid[];
|
|
|
|
/*
|
|
* Exports from unicode.c.
|
|
*/
|
|
#ifndef CP_UTF8
|
|
#define CP_UTF8 65001
|
|
#endif
|
|
/* void init_ucs(void); -- this is now in platform-specific headers */
|
|
bool 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,
|
|
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 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(
|
|
strbuf *in, void **out, int *outlen,
|
|
void (*callback)(void *, void *, int), void *callback_ctx);
|
|
void agent_cancel_query(agent_pending_query *);
|
|
void agent_query_synchronous(strbuf *in, void **out, int *outlen);
|
|
bool agent_exists(void);
|
|
|
|
/*
|
|
* Exports from wildcard.c
|
|
*/
|
|
const char *wc_error(int value);
|
|
int wc_match_pl(const char *wildcard, ptrlen target);
|
|
int wc_match(const char *wildcard, const char *target);
|
|
bool wc_unescape(char *output, const char *wildcard);
|
|
|
|
/*
|
|
* Exports from frontend (windlg.c etc)
|
|
*/
|
|
void pgp_fingerprints(void);
|
|
/*
|
|
* have_ssh_host_key() just returns true if a key of that type is
|
|
* already cached and false otherwise.
|
|
*/
|
|
bool have_ssh_host_key(const char *host, int port, const char *keytype);
|
|
|
|
/*
|
|
* Exports from console frontends (wincons.c, uxcons.c)
|
|
* that aren't equivalents to things in windlg.c et al.
|
|
*/
|
|
extern bool console_batch_mode, console_antispoof_prompt;
|
|
int console_get_userpass_input(prompts_t *p);
|
|
bool is_interactive(void);
|
|
void console_print_error_msg(const char *prefix, const char *msg);
|
|
void console_print_error_msg_fmt_v(
|
|
const char *prefix, const char *fmt, va_list ap);
|
|
void console_print_error_msg_fmt(const char *prefix, const char *fmt, ...);
|
|
|
|
/*
|
|
* 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 *, const void *, size_t);
|
|
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);
|
|
bool 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, dlgparam *dlg,
|
|
void *data, int event);
|
|
#define CHECKBOX_INVERT (1<<30)
|
|
void conf_checkbox_handler(union control *ctrl, dlgparam *dlg,
|
|
void *data, int event);
|
|
void conf_editbox_handler(union control *ctrl, dlgparam *dlg,
|
|
void *data, int event);
|
|
void conf_filesel_handler(union control *ctrl, dlgparam *dlg,
|
|
void *data, int event);
|
|
void conf_fontsel_handler(union control *ctrl, dlgparam *dlg,
|
|
void *data, int event);
|
|
/* Much more special-purpose function needed by sercfg.c */
|
|
void config_protocolbuttons_handler(union control *, dlgparam *, void *, int);
|
|
|
|
void setup_config_box(struct controlbox *b, bool midsession,
|
|
int protocol, int protcfginfo);
|
|
|
|
/*
|
|
* Exports from minibidi.c.
|
|
*/
|
|
#define BIDI_CHAR_INDEX_NONE ((unsigned short)-1)
|
|
typedef struct bidi_char {
|
|
unsigned int origwc, wc;
|
|
unsigned short index, nchars;
|
|
} bidi_char;
|
|
int do_bidi(bidi_char *line, int count);
|
|
int do_shape(bidi_char *line, bidi_char *to, int count);
|
|
bool 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);
|
|
bool filename_equal(const Filename *f1, const Filename *f2);
|
|
bool filename_is_null(const Filename *fn);
|
|
Filename *filename_copy(const Filename *fn);
|
|
void filename_free(Filename *fn);
|
|
void filename_serialise(BinarySink *bs, const Filename *f);
|
|
Filename *filename_deserialise(BinarySource *src);
|
|
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 */
|
|
bool 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 poll() 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);
|
|
bool 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 poll()
|
|
* call) then it can call toplevel_callback_pending(), which will
|
|
* return true if at least one callback is in the queue.
|
|
*
|
|
* run_toplevel_callbacks() returns true if it ran any actual code.
|
|
* This can be used as a means of speculatively terminating a poll
|
|
* loop, as in PSFTP, for example - if a callback has run then perhaps
|
|
* it might have done whatever the loop's caller was waiting for.
|
|
*/
|
|
typedef void (*toplevel_callback_fn_t)(void *ctx);
|
|
void queue_toplevel_callback(toplevel_callback_fn_t fn, void *ctx);
|
|
bool run_toplevel_callbacks(void);
|
|
bool toplevel_callback_pending(void);
|
|
void delete_callbacks_for_context(void *ctx);
|
|
|
|
/*
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* Another facility in callback.c deals with 'idempotent' callbacks,
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* defined as those which never need to be scheduled again if they are
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* already scheduled and have not yet run. (An example would be one
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* which, when called, empties a queue of data completely: when data
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* is added to the queue, you must ensure a run of the queue-consuming
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* function has been scheduled, but if one is already pending, you
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* don't need to schedule a second one.)
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*/
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struct IdempotentCallback {
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toplevel_callback_fn_t fn;
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void *ctx;
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bool queued;
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};
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void queue_idempotent_callback(struct IdempotentCallback *ic);
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typedef void (*toplevel_callback_notify_fn_t)(void *ctx);
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void request_callback_notifications(toplevel_callback_notify_fn_t notify,
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void *ctx);
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/*
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* Define no-op macros for the jump list functions, on platforms that
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* don't support them. (This is a bit of a hack, and it'd be nicer to
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* localise even the calls to those functions into the Windows front
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* end, but it'll do for the moment.)
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*/
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#ifndef JUMPLIST_SUPPORTED
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#define add_session_to_jumplist(x) ((void)0)
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#define remove_session_from_jumplist(x) ((void)0)
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#endif
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/* SURROGATE PAIR */
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#ifndef HIGH_SURROGATE_START /* in some toolchains <winnls.h> defines these */
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#define HIGH_SURROGATE_START 0xd800
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#define HIGH_SURROGATE_END 0xdbff
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#define LOW_SURROGATE_START 0xdc00
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#define LOW_SURROGATE_END 0xdfff
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#endif
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/* These macros exist in the Windows API, so the environment may
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* provide them. If not, define them in terms of the above. */
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#ifndef IS_HIGH_SURROGATE
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#define IS_HIGH_SURROGATE(wch) (((wch) >= HIGH_SURROGATE_START) && \
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((wch) <= HIGH_SURROGATE_END))
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#define IS_LOW_SURROGATE(wch) (((wch) >= LOW_SURROGATE_START) && \
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((wch) <= LOW_SURROGATE_END))
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#define IS_SURROGATE_PAIR(hs, ls) (IS_HIGH_SURROGATE(hs) && \
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IS_LOW_SURROGATE(ls))
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#endif
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#define IS_SURROGATE(wch) (((wch) >= HIGH_SURROGATE_START) && \
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((wch) <= LOW_SURROGATE_END))
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#define HIGH_SURROGATE_OF(codept) \
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(HIGH_SURROGATE_START + (((codept) - 0x10000) >> 10))
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#define LOW_SURROGATE_OF(codept) \
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(LOW_SURROGATE_START + (((codept) - 0x10000) & 0x3FF))
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#define FROM_SURROGATES(wch1, wch2) \
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(0x10000 + (((wch1) & 0x3FF) << 10) + ((wch2) & 0x3FF))
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#endif
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