14 #define GET_32BIT_LSB_FIRST(cp) \
15 (((unsigned long)(unsigned char)(cp)[0]) | \
16 ((unsigned long)(unsigned char)(cp)[1] << 8) | \
17 ((unsigned long)(unsigned char)(cp)[2] << 16) | \
18 ((unsigned long)(unsigned char)(cp)[3] << 24))
20 #define PUT_32BIT_LSB_FIRST(cp, value) ( \
22 (cp)[1] = (value) >> 8, \
23 (cp)[2] = (value) >> 16, \
24 (cp)[3] = (value) >> 24 )
26 #define GET_16BIT_LSB_FIRST(cp) \
27 (((unsigned long)(unsigned char)(cp)[0]) | \
28 ((unsigned long)(unsigned char)(cp)[1] << 8))
30 #define PUT_16BIT_LSB_FIRST(cp, value) ( \
32 (cp)[1] = (value) >> 8 )
34 #define GET_32BIT_MSB_FIRST(cp) \
35 (((unsigned long)(unsigned char)(cp)[0] << 24) | \
36 ((unsigned long)(unsigned char)(cp)[1] << 16) | \
37 ((unsigned long)(unsigned char)(cp)[2] << 8) | \
38 ((unsigned long)(unsigned char)(cp)[3]))
40 #define PUT_32BIT_MSB_FIRST(cp, value) ( \
41 (cp)[0] = (value) >> 24, \
42 (cp)[1] = (value) >> 16, \
43 (cp)[2] = (value) >> 8, \
46 #define GET_16BIT_MSB_FIRST(cp) \
47 (((unsigned long)(unsigned char)(cp)[0] << 8) | \
48 ((unsigned long)(unsigned char)(cp)[1]))
50 #define PUT_16BIT_MSB_FIRST(cp, value) ( \
51 (cp)[0] = (value) >> 8, \
55 struct pfwd_queue *next;
60 struct plug_function_table *fn;
61 /* the above variable absolutely *must* be the first in this structure */
62 void *c; /* (channel) data used by ssh.c */
63 void *backhandle; /* instance of SSH backend itself */
64 /* Note that backhandle need not be filled in if c is non-NULL */
67 int throttled, throttle_override;
70 struct pfwd_queue *waiting;
73 void pfd_close(Socket s);
76 static int pfd_closing(Plug plug, char *error_msg, int error_code,
79 struct PFwdPrivate *pr = (struct PFwdPrivate *) plug;
82 * We have no way to communicate down the forwarded connection,
83 * so if an error occurred on the socket, we just ignore it
84 * and treat it like a proper close.
91 static int pfd_receive(Plug plug, int urgent, char *data, int len)
93 struct PFwdPrivate *pr = (struct PFwdPrivate *) plug;
95 if (sshfwd_write(pr->c, data, len) > 0) {
97 sk_set_frozen(pr->s, 1);
103 static void pfd_sent(Plug plug, int bufsize)
105 struct PFwdPrivate *pr = (struct PFwdPrivate *) plug;
107 sshfwd_unthrottle(pr->c, bufsize);
111 * Called when receiving a PORT OPEN from the server
113 char *pfd_newconnect(Socket *s, char *hostname, int port, void *c)
115 static struct plug_function_table fn_table = {
123 char *err, *dummy_realhost;
124 struct PFwdPrivate *pr;
129 addr = sk_namelookup(hostname, &dummy_realhost);
130 if ((err = sk_addr_error(addr)))
136 pr = (struct PFwdPrivate *) smalloc(sizeof(struct PFwdPrivate));
138 pr->throttled = pr->throttle_override = 0;
141 pr->backhandle = NULL; /* we shouldn't need this */
143 pr->s = *s = new_connection(addr, dummy_realhost, port, 0, 1, 0, (Plug) pr);
144 if ((err = sk_socket_error(*s))) {
149 sk_set_private_ptr(*s, pr);
155 called when someone connects to the local port
158 static int pfd_accepting(Plug p, void *sock)
160 static struct plug_function_table fn_table = {
166 struct PFwdPrivate *pr, *org;
170 org = (struct PFwdPrivate *)p;
171 pr = (struct PFwdPrivate *) smalloc(sizeof(struct PFwdPrivate));
175 pr->backhandle = org->backhandle;
177 pr->s = s = sk_register(sock, (Plug) pr);
178 if ((err = sk_socket_error(s))) {
183 pr->c = new_sock_channel(org->backhandle, s);
185 strcpy(pr->hostname, org->hostname);
186 pr->port = org->port;
187 pr->throttled = pr->throttle_override = 0;
191 sk_set_private_ptr(s, pr);
197 /* asks to forward to the specified host/port for this */
198 ssh_send_port_open(pr->c, pr->hostname, pr->port, "forwarding");
205 /* Add a new forwarding from port -> desthost:destport
206 sets up a listener on the local machine on port
208 char *pfd_addforward(char *desthost, int destport, int port, void *backhandle)
210 static struct plug_function_table fn_table = {
212 pfd_receive, /* should not happen... */
213 pfd_sent, /* also should not happen */
218 struct PFwdPrivate *pr;
224 pr = (struct PFwdPrivate *) smalloc(sizeof(struct PFwdPrivate));
227 strcpy(pr->hostname, desthost);
229 pr->throttled = pr->throttle_override = 0;
232 pr->backhandle = backhandle;
234 pr->s = s = new_listener(port, (Plug) pr, !cfg.lport_acceptall);
235 if ((err = sk_socket_error(s))) {
240 sk_set_private_ptr(s, pr);
245 void pfd_close(Socket s)
247 struct PFwdPrivate *pr;
252 pr = (struct PFwdPrivate *) sk_get_private_ptr(s);
259 void pfd_unthrottle(Socket s)
261 struct PFwdPrivate *pr;
264 pr = (struct PFwdPrivate *) sk_get_private_ptr(s);
267 sk_set_frozen(s, pr->throttled || pr->throttle_override);
270 void pfd_override_throttle(Socket s, int enable)
272 struct PFwdPrivate *pr;
275 pr = (struct PFwdPrivate *) sk_get_private_ptr(s);
277 pr->throttle_override = enable;
278 sk_set_frozen(s, pr->throttled || pr->throttle_override);
282 * Called to send data down the raw connection.
284 int pfd_send(Socket s, char *data, int len)
288 return sk_write(s, data, len);
292 void pfd_confirm(Socket s)
294 struct PFwdPrivate *pr;
299 pr = (struct PFwdPrivate *) sk_get_private_ptr(s);
302 sk_write(s, NULL, 0);