15 #define GET_32BIT_LSB_FIRST(cp) \
16 (((unsigned long)(unsigned char)(cp)[0]) | \
17 ((unsigned long)(unsigned char)(cp)[1] << 8) | \
18 ((unsigned long)(unsigned char)(cp)[2] << 16) | \
19 ((unsigned long)(unsigned char)(cp)[3] << 24))
21 #define PUT_32BIT_LSB_FIRST(cp, value) ( \
23 (cp)[1] = (value) >> 8, \
24 (cp)[2] = (value) >> 16, \
25 (cp)[3] = (value) >> 24 )
27 #define GET_16BIT_LSB_FIRST(cp) \
28 (((unsigned long)(unsigned char)(cp)[0]) | \
29 ((unsigned long)(unsigned char)(cp)[1] << 8))
31 #define PUT_16BIT_LSB_FIRST(cp, value) ( \
33 (cp)[1] = (value) >> 8 )
35 #define GET_32BIT_MSB_FIRST(cp) \
36 (((unsigned long)(unsigned char)(cp)[0] << 24) | \
37 ((unsigned long)(unsigned char)(cp)[1] << 16) | \
38 ((unsigned long)(unsigned char)(cp)[2] << 8) | \
39 ((unsigned long)(unsigned char)(cp)[3]))
41 #define PUT_32BIT_MSB_FIRST(cp, value) ( \
42 (cp)[0] = (value) >> 24, \
43 (cp)[1] = (value) >> 16, \
44 (cp)[2] = (value) >> 8, \
47 #define GET_16BIT_MSB_FIRST(cp) \
48 (((unsigned long)(unsigned char)(cp)[0] << 8) | \
49 ((unsigned long)(unsigned char)(cp)[1]))
51 #define PUT_16BIT_MSB_FIRST(cp, value) ( \
52 (cp)[0] = (value) >> 8, \
56 struct pfwd_queue *next;
61 struct plug_function_table *fn;
62 /* the above variable absolutely *must* be the first in this structure */
63 void *c; /* (channel) data used by ssh.c */
66 int throttled, throttle_override;
69 struct pfwd_queue *waiting;
72 void pfd_close(Socket s);
75 static int pfd_closing(Plug plug, char *error_msg, int error_code,
78 struct PFwdPrivate *pr = (struct PFwdPrivate *) plug;
81 * We have no way to communicate down the forwarded connection,
82 * so if an error occurred on the socket, we just ignore it
83 * and treat it like a proper close.
90 static int pfd_receive(Plug plug, int urgent, char *data, int len)
92 struct PFwdPrivate *pr = (struct PFwdPrivate *) plug;
94 if (sshfwd_write(pr->c, data, len) > 0) {
96 sk_set_frozen(pr->s, 1);
102 static void pfd_sent(Plug plug, int bufsize)
104 struct PFwdPrivate *pr = (struct PFwdPrivate *) plug;
106 sshfwd_unthrottle(pr->c, bufsize);
110 * Called when receiving a PORT OPEN from the server
112 char *pfd_newconnect(Socket *s, char *hostname, int port, void *c)
114 static struct plug_function_table fn_table = {
122 char *err, *dummy_realhost;
123 struct PFwdPrivate *pr;
128 addr = sk_namelookup(hostname, &dummy_realhost);
129 if ((err = sk_addr_error(addr)))
135 pr = (struct PFwdPrivate *) smalloc(sizeof(struct PFwdPrivate));
137 pr->throttled = pr->throttle_override = 0;
141 pr->s = *s = new_connection(addr, dummy_realhost, port, 0, 1, 0, (Plug) pr);
142 if ((err = sk_socket_error(*s))) {
147 sk_set_private_ptr(*s, pr);
153 called when someone connects to the local port
156 static int pfd_accepting(Plug p, void *sock)
158 static struct plug_function_table fn_table = {
164 struct PFwdPrivate *pr, *org;
168 org = (struct PFwdPrivate *)p;
169 pr = (struct PFwdPrivate *) smalloc(sizeof(struct PFwdPrivate));
174 pr->s = s = sk_register(sock, (Plug) pr);
175 if ((err = sk_socket_error(s))) {
180 pr->c = new_sock_channel(s);
182 strcpy(pr->hostname, org->hostname);
183 pr->port = org->port;
184 pr->throttled = pr->throttle_override = 0;
188 sk_set_private_ptr(s, pr);
194 /* asks to forward to the specified host/port for this */
195 ssh_send_port_open(pr->c, pr->hostname, pr->port, "forwarding");
202 /* Add a new forwarding from port -> desthost:destport
203 sets up a listener on the local machine on port
205 char *pfd_addforward(char *desthost, int destport, int port)
207 static struct plug_function_table fn_table = {
209 pfd_receive, /* should not happen... */
210 pfd_sent, /* also should not happen */
215 struct PFwdPrivate *pr;
221 pr = (struct PFwdPrivate *) smalloc(sizeof(struct PFwdPrivate));
224 strcpy(pr->hostname, desthost);
226 pr->throttled = pr->throttle_override = 0;
230 pr->s = s = new_listener(port, (Plug) pr, !cfg.lport_acceptall);
231 if ((err = sk_socket_error(s))) {
236 sk_set_private_ptr(s, pr);
241 void pfd_close(Socket s)
243 struct PFwdPrivate *pr;
248 pr = (struct PFwdPrivate *) sk_get_private_ptr(s);
255 void pfd_unthrottle(Socket s)
257 struct PFwdPrivate *pr;
260 pr = (struct PFwdPrivate *) sk_get_private_ptr(s);
263 sk_set_frozen(s, pr->throttled || pr->throttle_override);
266 void pfd_override_throttle(Socket s, int enable)
268 struct PFwdPrivate *pr;
271 pr = (struct PFwdPrivate *) sk_get_private_ptr(s);
273 pr->throttle_override = enable;
274 sk_set_frozen(s, pr->throttled || pr->throttle_override);
278 * Called to send data down the raw connection.
280 int pfd_send(Socket s, char *data, int len)
284 return sk_write(s, data, len);
288 void pfd_confirm(Socket s)
290 struct PFwdPrivate *pr;
295 pr = (struct PFwdPrivate *) sk_get_private_ptr(s);
298 sk_write(s, NULL, 0);