mirror of
https://git.tartarus.org/simon/putty.git
synced 2025-01-09 09:27:59 +00:00
5129c40bea
Now I've got FROMFIELD, I can rework it so that structures providing an implementation of the Socket or Plug trait no longer have to have the vtable pointer as the very first thing in the structure. In particular, this means that the ProxySocket structure can now directly implement _both_ the Socket and Plug traits, which is always _logically_ how it's worked, but previously it had to be implemented via two separate structs linked to each other.
116 lines
3.0 KiB
C
116 lines
3.0 KiB
C
/*
|
|
* Network proxy abstraction in PuTTY
|
|
*
|
|
* A proxy layer, if necessary, wedges itself between the
|
|
* network code and the higher level backend.
|
|
*
|
|
* Supported proxies: HTTP CONNECT, generic telnet, SOCKS 4 & 5
|
|
*/
|
|
|
|
#ifndef PUTTY_PROXY_H
|
|
#define PUTTY_PROXY_H
|
|
|
|
#define PROXY_ERROR_GENERAL 8000
|
|
#define PROXY_ERROR_UNEXPECTED 8001
|
|
|
|
typedef struct ProxySocket ProxySocket;
|
|
|
|
struct ProxySocket {
|
|
const char *error;
|
|
|
|
Socket sub_socket;
|
|
Plug plug;
|
|
SockAddr remote_addr;
|
|
int remote_port;
|
|
|
|
bufchain pending_output_data;
|
|
bufchain pending_oob_output_data;
|
|
int pending_flush;
|
|
bufchain pending_input_data;
|
|
int pending_eof;
|
|
|
|
#define PROXY_STATE_NEW -1
|
|
#define PROXY_STATE_ACTIVE 0
|
|
|
|
int state; /* proxy states greater than 0 are implementation
|
|
* dependent, but represent various stages/states
|
|
* of the initialization/setup/negotiation with the
|
|
* proxy server.
|
|
*/
|
|
int freeze; /* should we freeze the underlying socket when
|
|
* we are done with the proxy negotiation? this
|
|
* simply caches the value of sk_set_frozen calls.
|
|
*/
|
|
|
|
#define PROXY_CHANGE_NEW -1
|
|
#define PROXY_CHANGE_CLOSING 0
|
|
#define PROXY_CHANGE_SENT 1
|
|
#define PROXY_CHANGE_RECEIVE 2
|
|
#define PROXY_CHANGE_ACCEPTING 3
|
|
|
|
/* something has changed (a call from the sub socket
|
|
* layer into our Proxy Plug layer, or we were just
|
|
* created, etc), so the proxy layer needs to handle
|
|
* this change (the type of which is the second argument)
|
|
* and further the proxy negotiation process.
|
|
*/
|
|
|
|
int (*negotiate) (ProxySocket * /* this */, int /* change type */);
|
|
|
|
/* current arguments of plug handlers
|
|
* (for use by proxy's negotiate function)
|
|
*/
|
|
|
|
/* closing */
|
|
const char *closing_error_msg;
|
|
int closing_error_code;
|
|
int closing_calling_back;
|
|
|
|
/* receive */
|
|
int receive_urgent;
|
|
char *receive_data;
|
|
int receive_len;
|
|
|
|
/* sent */
|
|
int sent_bufsize;
|
|
|
|
/* accepting */
|
|
accept_fn_t accepting_constructor;
|
|
accept_ctx_t accepting_ctx;
|
|
|
|
/* configuration, used to look up proxy settings */
|
|
Conf *conf;
|
|
|
|
/* CHAP transient data */
|
|
int chap_num_attributes;
|
|
int chap_num_attributes_processed;
|
|
int chap_current_attribute;
|
|
int chap_current_datalen;
|
|
|
|
const Socket_vtable *sockvt;
|
|
const Plug_vtable *plugvt;
|
|
};
|
|
|
|
extern void proxy_activate (ProxySocket *);
|
|
|
|
extern int proxy_http_negotiate (ProxySocket *, int);
|
|
extern int proxy_telnet_negotiate (ProxySocket *, int);
|
|
extern int proxy_socks4_negotiate (ProxySocket *, int);
|
|
extern int proxy_socks5_negotiate (ProxySocket *, int);
|
|
|
|
/*
|
|
* This may be reused by local-command proxies on individual
|
|
* platforms.
|
|
*/
|
|
char *format_telnet_command(SockAddr addr, int port, Conf *conf);
|
|
|
|
/*
|
|
* These are implemented in cproxy.c or nocproxy.c, depending on
|
|
* whether encrypted proxy authentication is available.
|
|
*/
|
|
extern void proxy_socks5_offerencryptedauth(BinarySink *);
|
|
extern int proxy_socks5_handlechap (ProxySocket *);
|
|
extern int proxy_socks5_selectchap(ProxySocket *);
|
|
|
|
#endif
|