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8001dd4cbb
This is a vtable that wraps up all the functionality required from the SSH connection layer by associated modules like port forwarding and connection sharing. This extra layer of indirection adds nothing useful right now, but when I later separate the SSH-1 and SSH-2 connection layer implementations, it will be convenient for each one to be able to implement this vtable in terms of its own internal data structures. To simplify this vtable, I've moved a lot of the logging duties relating to connection sharing out of ssh.c into sshshare.c: now it handles nearly all the logging itself relating to setting up connection sharing in the first place and downstreams connecting and disconnecting. The only exception is the 'Reusing a shared connection' announcement in the console window, which is now done in ssh.c by detecting downstream status immediately after setup.
107 lines
3.0 KiB
C
107 lines
3.0 KiB
C
/*
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* defs.h: initial definitions for PuTTY.
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*
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* The rule about this header file is that it can't depend on any
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* other header file in this code base. This is where we define
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* things, as much as we can, that other headers will want to refer
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* to, such as opaque structure types and their associated typedefs,
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* or macros that are used by other headers.
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*/
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#ifndef PUTTY_DEFS_H
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#define PUTTY_DEFS_H
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#include <stddef.h>
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#ifndef FALSE
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#define FALSE 0
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#endif
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#ifndef TRUE
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#define TRUE 1
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#endif
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typedef struct conf_tag Conf;
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typedef struct terminal_tag Terminal;
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typedef struct Filename Filename;
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typedef struct FontSpec FontSpec;
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typedef struct bufchain_tag bufchain;
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typedef struct strbuf strbuf;
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struct RSAKey;
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#include <stdint.h>
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typedef uint32_t uint32;
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typedef struct BinarySink BinarySink;
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typedef struct BinarySource BinarySource;
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typedef struct SockAddr_tag *SockAddr;
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typedef struct Socket_vtable Socket_vtable;
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typedef struct Plug_vtable Plug_vtable;
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typedef struct Backend Backend;
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typedef struct Backend_vtable Backend_vtable;
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typedef struct Ldisc_tag Ldisc;
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typedef struct LogContext_tag LogContext;
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typedef struct Frontend Frontend;
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typedef struct ssh_tag *Ssh;
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typedef struct Channel Channel;
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typedef struct SshChannel SshChannel;
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typedef struct ssh_sharing_state ssh_sharing_state;
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typedef struct ssh_sharing_connstate ssh_sharing_connstate;
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typedef struct share_channel share_channel;
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typedef struct PortFwdManager PortFwdManager;
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typedef struct PortFwdRecord PortFwdRecord;
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typedef struct ConnectionLayer ConnectionLayer;
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typedef struct dlgparam dlgparam;
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typedef struct settings_w settings_w;
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typedef struct settings_r settings_r;
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typedef struct settings_e settings_e;
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/* Note indirection: for historical reasons (it used to be closer to
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* the OS socket type), the type that most code uses for a socket is
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* 'Socket', not 'Socket *'. So an implementation of Socket or Plug
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* has a 'const Socket *' field for the vtable pointer, and the
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* 'Socket' type returned to client code is a pointer to _that_ in
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* turn. */
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typedef const Socket_vtable **Socket;
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typedef const Plug_vtable **Plug;
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/*
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* A small structure wrapping up a (pointer, length) pair so that it
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* can be conveniently passed to or from a function.
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*/
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typedef struct ptrlen {
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const void *ptr;
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size_t len;
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} ptrlen;
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typedef struct logblank_t logblank_t;
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/* Do a compile-time type-check of 'to_check' (without evaluating it),
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* as a side effect of returning the value 'to_return'. Note that
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* although this macro double-*expands* to_return, it always
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* *evaluates* exactly one copy of it, so it's side-effect safe. */
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#define TYPECHECK(to_check, to_return) \
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(sizeof(to_check) ? (to_return) : (to_return))
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/* Return a pointer to the object of structure type 'type' whose field
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* with name 'field' is pointed at by 'object'. */
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#define FROMFIELD(object, type, field) \
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TYPECHECK(object == &((type *)0)->field, \
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((type *)(((char *)(object)) - offsetof(type, field))))
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#endif /* PUTTY_DEFS_H */
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