зеркало из https://github.com/github/putty.git
112 строки
3.0 KiB
C
112 строки
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;
|
|
bufchain pending_input_data;
|
|
bool 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.
|
|
*/
|
|
bool 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;
|
|
bool closing_calling_back;
|
|
|
|
/* receive */
|
|
bool receive_urgent;
|
|
const char *receive_data;
|
|
int receive_len;
|
|
|
|
/* 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;
|
|
|
|
Socket sock;
|
|
Plug plugimpl;
|
|
};
|
|
|
|
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
|