putty.h

一个支持FTP,SFTP的客户端程序

#ifndef PUTTY_PUTTY_H
#define PUTTY_PUTTY_H

#include <stddef.h>		       /* for wchar_t */

/*
 * Global variables. Most modules declare these `extern', but
 * window.c will do `#define PUTTY_DO_GLOBALS' before including this
 * module, and so will get them properly defined.
 */
#ifndef GLOBAL
#ifdef PUTTY_DO_GLOBALS
#define GLOBAL
#else
#define GLOBAL extern
#endif
#endif

#ifndef DONE_TYPEDEFS
#define DONE_TYPEDEFS
typedef struct config_tag Config;
typedef struct backend_tag Backend;
typedef struct terminal_tag Terminal;
#endif

#include "puttyps.h"
#include "network.h"
#include "misc.h"

/* Three attribute types: 
 * The ATTRs (normal attributes) are stored with the characters in
 * the main display arrays
 *
 * The TATTRs (temporary attributes) are generated on the fly, they
 * can overlap with characters but not with normal attributes.
 *
 * The LATTRs (line attributes) are an entirely disjoint space of
 * flags.
 *
 * The DATTRs (display attributes) are internal to terminal.c (but
 * defined here because their values have to match the others
 * here); they reuse the TATTR_* space but are always masked off
 * before sending to the front end.
 *
 * ATTR_INVALID is an illegal colour combination.
 */

#define TATTR_ACTCURS 	    0x40000000UL      /* active cursor (block) */
#define TATTR_PASCURS 	    0x20000000UL      /* passive cursor (box) */
#define TATTR_RIGHTCURS	    0x10000000UL      /* cursor-on-RHS */
#define TATTR_COMBINING     0x80000000UL      /* combining characters */

#define DATTR_STARTRUN      0x80000000UL   /* start of redraw run */

#define TDATTR_MASK         0xF0000000UL
#define TATTR_MASK (TDATTR_MASK)
#define DATTR_MASK (TDATTR_MASK)

#define LATTR_NORM   0x00000000UL
#define LATTR_WIDE   0x00000001UL
#define LATTR_TOP    0x00000002UL
#define LATTR_BOT    0x00000003UL
#define LATTR_MODE   0x00000003UL
#define LATTR_WRAPPED 0x00000010UL
#define LATTR_WRAPPED2 0x00000020UL

#define ATTR_INVALID 0x03FFFFU

/* Like Linux use the F000 page for direct to font. */
#define CSET_OEMCP   0x0000F000UL      /* OEM Codepage DTF */
#define CSET_ACP     0x0000F100UL      /* Ansi Codepage DTF */

/* These are internal use overlapping with the UTF-16 surrogates */
#define CSET_ASCII   0x0000D800UL      /* normal ASCII charset ESC ( B */
#define CSET_LINEDRW 0x0000D900UL      /* line drawing charset ESC ( 0 */
#define CSET_SCOACS  0x0000DA00UL      /* SCO Alternate charset */
#define CSET_GBCHR   0x0000DB00UL      /* UK variant   charset ESC ( A */
#define CSET_MASK    0xFFFFFF00UL      /* Character set mask */

#define DIRECT_CHAR(c) ((c&0xFFFFFC00)==0xD800)
#define DIRECT_FONT(c) ((c&0xFFFFFE00)==0xF000)

#define UCSERR	     (CSET_LINEDRW|'a')	/* UCS Format error character. */
/*
 * UCSWIDE is a special value used in the terminal data to signify
 * the character cell containing the right-hand half of a CJK wide
 * character. We use 0xDFFF because it's part of the surrogate
 * range and hence won't be used for anything else (it's impossible
 * to input it via UTF-8 because our UTF-8 decoder correctly
 * rejects surrogates).
 */
#define UCSWIDE	     0xDFFF

#define ATTR_NARROW  0x800000U
#define ATTR_WIDE    0x400000U
#define ATTR_BOLD    0x040000U
#define ATTR_UNDER   0x080000U
#define ATTR_REVERSE 0x100000U
#define ATTR_BLINK   0x200000U
#define ATTR_FGMASK  0x0001FFU
#define ATTR_BGMASK  0x03FE00U
#define ATTR_COLOURS 0x03FFFFU
#define ATTR_FGSHIFT 0
#define ATTR_BGSHIFT 9

/*
 * The definitive list of colour numbers stored in terminal
 * attribute words is kept here. It is:
 * 
 *  - 0-7 are ANSI colours (KRGYBMCW).
 *  - 8-15 are the bold versions of those colours.
 *  - 16-255 are the remains of the xterm 256-colour mode (a
 *    216-colour cube with R at most significant and B at least,
 *    followed by a uniform series of grey shades running between
 *    black and white but not including either on grounds of
 *    redundancy).
 *  - 256 is default foreground
 *  - 257 is default bold foreground
 *  - 258 is default background
 *  - 259 is default bold background
 *  - 260 is cursor foreground
 *  - 261 is cursor background
 */

#define ATTR_DEFFG   (256 << ATTR_FGSHIFT)
#define ATTR_DEFBG   (258 << ATTR_BGSHIFT)
#define ATTR_DEFAULT (ATTR_DEFFG | ATTR_DEFBG)

struct sesslist {
    int nsessions;
    char **sessions;
    char *buffer;		       /* so memory can be freed later */
};

struct unicode_data {
    char **uni_tbl;
    int dbcs_screenfont;
    int font_codepage;
    int line_codepage;
    wchar_t unitab_scoacs[256];
    wchar_t unitab_line[256];
    wchar_t unitab_font[256];
    wchar_t unitab_xterm[256];
    wchar_t unitab_oemcp[256];
    unsigned char unitab_ctrl[256];
};

#define LGXF_OVR  1		       /* existing logfile overwrite */
#define LGXF_APN  0		       /* existing logfile append */
#define LGXF_ASK -1		       /* existing logfile ask */
#define LGTYP_NONE  0		       /* logmode: no logging */
#define LGTYP_ASCII 1		       /* logmode: pure ascii */
#define LGTYP_DEBUG 2		       /* logmode: all chars of traffic */
#define LGTYP_PACKETS 3		       /* logmode: SSH data packets */

typedef enum {
    /* Actual special commands. Originally Telnet, but some codes have
     * been re-used for similar specials in other protocols. */
    TS_AYT, TS_BRK, TS_SYNCH, TS_EC, TS_EL, TS_GA, TS_NOP, TS_ABORT,
    TS_AO, TS_IP, TS_SUSP, TS_EOR, TS_EOF, TS_LECHO, TS_RECHO, TS_PING,
    TS_EOL,
    /* Special command for SSH. */
    TS_REKEY,
    /* POSIX-style signals. (not Telnet) */
    TS_SIGABRT, TS_SIGALRM, TS_SIGFPE,  TS_SIGHUP,  TS_SIGILL,
    TS_SIGINT,  TS_SIGKILL, TS_SIGPIPE, TS_SIGQUIT, TS_SIGSEGV,
    TS_SIGTERM, TS_SIGUSR1, TS_SIGUSR2,
    /* Pseudo-specials used for contructing the specials menu. */
    TS_SEP,         /* Separator */
    TS_SUBMENU,     /* Start a new sumbenu with specified name */
    TS_EXITMENU     /* Exit current submenu or end of specials */
} Telnet_Special;

struct telnet_special {
    const char *name;
    int code;
};

typedef enum {
    MBT_NOTHING,
    MBT_LEFT, MBT_MIDDLE, MBT_RIGHT,   /* `raw' button designations */
    MBT_SELECT, MBT_EXTEND, MBT_PASTE, /* `cooked' button designations */
    MBT_WHEEL_UP, MBT_WHEEL_DOWN       /* mouse wheel */
} Mouse_Button;

typedef enum {
    MA_NOTHING, MA_CLICK, MA_2CLK, MA_3CLK, MA_DRAG, MA_RELEASE
} Mouse_Action;

/* Keyboard modifiers -- keys the user is actually holding down */

#define PKM_SHIFT	0x01
#define PKM_CONTROL	0x02
#define PKM_META	0x04
#define PKM_ALT		0x08

/* Keyboard flags that aren't really modifiers */
#define PKF_CAPSLOCK	0x10
#define PKF_NUMLOCK	0x20
#define PKF_REPEAT	0x40

/* Stand-alone keysyms for function keys */

typedef enum {
    PK_NULL,		/* No symbol for this key */
    /* Main keypad keys */
    PK_ESCAPE, PK_TAB, PK_BACKSPACE, PK_RETURN, PK_COMPOSE,
    /* Editing keys */
    PK_HOME, PK_INSERT, PK_DELETE, PK_END, PK_PAGEUP, PK_PAGEDOWN,
    /* Cursor keys */
    PK_UP, PK_DOWN, PK_RIGHT, PK_LEFT, PK_REST,
    /* Numeric keypad */			/* Real one looks like: */
    PK_PF1, PK_PF2, PK_PF3, PK_PF4,		/* PF1 PF2 PF3 PF4 */
    PK_KPCOMMA, PK_KPMINUS, PK_KPDECIMAL,	/*  7   8   9   -  */
    PK_KP0, PK_KP1, PK_KP2, PK_KP3, PK_KP4,	/*  4   5   6   ,  */
    PK_KP5, PK_KP6, PK_KP7, PK_KP8, PK_KP9,	/*  1   2   3  en- */
    PK_KPBIGPLUS, PK_KPENTER,			/*    0     .  ter */
    /* Top row */
    PK_F1,  PK_F2,  PK_F3,  PK_F4,  PK_F5,
    PK_F6,  PK_F7,  PK_F8,  PK_F9,  PK_F10,
    PK_F11, PK_F12, PK_F13, PK_F14, PK_F15,
    PK_F16, PK_F17, PK_F18, PK_F19, PK_F20,
    PK_PAUSE
} Key_Sym;

#define PK_ISEDITING(k)	((k) >= PK_HOME && (k) <= PK_PAGEDOWN)
#define PK_ISCURSOR(k)	((k) >= PK_UP && (k) <= PK_REST)
#define PK_ISKEYPAD(k)	((k) >= PK_PF1 && (k) <= PK_KPENTER)
#define PK_ISFKEY(k)	((k) >= PK_F1 && (k) <= PK_F20)

enum {
    VT_XWINDOWS, VT_OEMANSI, VT_OEMONLY, VT_POORMAN, VT_UNICODE
};

enum {
    /*
     * SSH-2 key exchange algorithms
     */
    KEX_WARN,
    KEX_DHGROUP1,
    KEX_DHGROUP14,
    KEX_DHGEX,
    KEX_MAX
};

enum {
    /*
     * SSH ciphers (both SSH1 and SSH2)
     */
    CIPHER_WARN,		       /* pseudo 'cipher' */
    CIPHER_3DES,
    CIPHER_BLOWFISH,
    CIPHER_AES,			       /* (SSH 2 only) */
    CIPHER_DES,
    CIPHER_MAX			       /* no. ciphers (inc warn) */
};

enum {
    /*
     * Several different bits of the PuTTY configuration seem to be
     * three-way settings whose values are `always yes', `always
     * no', and `decide by some more complex automated means'. This
     * is true of line discipline options (local echo and line
     * editing), proxy DNS, Close On Exit, and SSH server bug
     * workarounds. Accordingly I supply a single enum here to deal
     * with them all.
     */
    FORCE_ON, FORCE_OFF, AUTO
};

enum {
    /*
     * Proxy types.
     */
    PROXY_NONE, PROXY_SOCKS4, PROXY_SOCKS5,
    PROXY_HTTP, PROXY_TELNET, PROXY_CMD
};

enum {
    /*
     * Line discipline options which the backend might try to control.
     */
    LD_EDIT,			       /* local line editing */
    LD_ECHO			       /* local echo */
};

enum {
    /* Protocol back ends. (cfg.protocol) */
    PROT_RAW, PROT_TELNET, PROT_RLOGIN, PROT_SSH
};

enum {
    /* Bell settings (cfg.beep) */
    BELL_DISABLED, BELL_DEFAULT, BELL_VISUAL, BELL_WAVEFILE, BELL_PCSPEAKER
};

enum {
    /* Taskbar flashing indication on bell (cfg.beep_ind) */
    B_IND_DISABLED, B_IND_FLASH, B_IND_STEADY
};

enum {
    /* Resize actions (cfg.resize_action) */
    RESIZE_TERM, RESIZE_DISABLED, RESIZE_FONT, RESIZE_EITHER
};

enum {
    /* Function key types (cfg.funky_type) */
    FUNKY_TILDE,
    FUNKY_LINUX,
    FUNKY_XTERM,
    FUNKY_VT400,
    FUNKY_VT100P,
    FUNKY_SCO
};

enum {
    /*
     * Network address types. Used for specifying choice of IPv4/v6
     * in config; also used in proxy.c to indicate whether a given
     * host name has already been resolved or will be resolved at
     * the proxy end.
     */
    ADDRTYPE_UNSPEC, ADDRTYPE_IPV4, ADDRTYPE_IPV6, ADDRTYPE_NAME
};

struct backend_tag {
    const char *(*init) (void *frontend_handle, void **backend_handle,
			 Config *cfg,
			 char *host, int port, char **realhost, int nodelay,
			 int keepalive);
    void (*free) (void *handle);
    /* back->reconfig() passes in a replacement configuration. */
    void (*reconfig) (void *handle, Config *cfg);
    /* back->send() returns the current amount of buffered data. */
    int (*send) (void *handle, char *buf, int len);
    /* back->sendbuffer() does the same thing but without attempting a send */
    int (*sendbuffer) (void *handle);
    void (*size) (void *handle, int width, int height);
    void (*special) (void *handle, Telnet_Special code);
    const struct telnet_special *(*get_specials) (void *handle);
    Socket(*socket) (void *handle);
    int (*exitcode) (void *handle);
    int (*sendok) (void *handle);
    int (*ldisc) (void *handle, int);
    void (*provide_ldisc) (void *handle, void *ldisc);
    void (*provide_logctx) (void *handle, void *logctx);
    /*
     * back->unthrottle() tells the back end that the front end
     * buffer is clearing.
     */
    void (*unthrottle) (void *handle, int);
    int (*cfg_info) (void *handle);
    int default_port;
};

extern struct backend_list {
    int protocol;
    char *name;
    Backend *backend;
} backends[];

/*
 * Suggested default protocol provided by the backend link module.
 * The application is free to ignore this.
 */
extern const int be_default_protocol;

/*
 * Name of this particular application, for use in the config box