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, \
55 extern void sshfwd_close(void *);
56 extern void sshfwd_write(void *, char *, int);
59 struct pfwd_queue *next;
64 struct plug_function_table *fn;
65 /* the above variable absolutely *must* be the first in this structure */
66 void *c; /* (channel) data used by ssh.c */
71 struct pfwd_queue *waiting;
74 void pfd_close(Socket s);
77 static int pfd_closing(Plug plug, char *error_msg, int error_code,
80 struct PFwdPrivate *pr = (struct PFwdPrivate *) plug;
83 * We have no way to communicate down the forwarded connection,
84 * so if an error occurred on the socket, we just ignore it
85 * and treat it like a proper close.
92 static int pfd_receive(Plug plug, int urgent, char *data, int len)
94 struct PFwdPrivate *pr = (struct PFwdPrivate *) plug;
97 sshfwd_write(pr->c, data, len);
102 * Called when receiving a PORT OPEN from the server
104 char *pfd_newconnect(Socket *s, char *hostname, int port, void *c)
106 static struct plug_function_table fn_table = {
113 char *err, *dummy_realhost;
114 struct PFwdPrivate *pr;
119 addr = sk_namelookup(hostname, &dummy_realhost);
120 if ((err = sk_addr_error(addr)))
126 pr = (struct PFwdPrivate *) smalloc(sizeof(struct PFwdPrivate));
131 pr->s = *s = sk_new(addr, port, 0, 1, (Plug) pr);
132 if ((err = sk_socket_error(*s))) {
137 sk_set_private_ptr(*s, pr);
143 called when someone connects to the local port
146 static int pfd_accepting(Plug p, struct sockaddr *addr, void *sock)
148 /* for now always accept this socket */
149 static struct plug_function_table fn_table = {
154 struct PFwdPrivate *pr, *org;
155 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
159 if (ntohl(sin->sin_addr.s_addr) != 0x7F000001 && !cfg.lport_acceptall)
160 return 1; /* denied */
162 org = (struct PFwdPrivate *)p;
163 pr = (struct PFwdPrivate *) smalloc(sizeof(struct PFwdPrivate));
168 pr->s = s = sk_register(sock, (Plug) pr);
169 if ((err = sk_socket_error(s))) {
174 pr->c = new_sock_channel(s);
176 strcpy(pr->hostname, org->hostname);
177 pr->port = org->port;
181 sk_set_private_ptr(s, pr);
187 /* asks to forward to the specified host/port for this */
188 ssh_send_port_open(pr->c, pr->hostname, pr->port, "forwarding");
195 /* Add a new forwarding from port -> desthost:destport
196 sets up a listenner on the local machine on port
198 char *pfd_addforward(char *desthost, int destport, int port)
200 static struct plug_function_table fn_table = {
202 pfd_receive, /* should not happen... */
207 struct PFwdPrivate *pr;
213 pr = (struct PFwdPrivate *) smalloc(sizeof(struct PFwdPrivate));
216 strcpy(pr->hostname, desthost);
221 pr->s = s = sk_newlistenner(port, (Plug) pr);
222 if ((err = sk_socket_error(s))) {
227 sk_set_private_ptr(s, pr);
232 void pfd_close(Socket s)
234 struct PFwdPrivate *pr;
239 pr = (struct PFwdPrivate *) sk_get_private_ptr(s);
247 * Called to send data down the raw connection.
249 void pfd_send(Socket s, char *data, int len)
254 sk_write(s, data, len);
258 void pfd_confirm(Socket s)
260 struct PFwdPrivate *pr;
265 pr = (struct PFwdPrivate *) sk_get_private_ptr(s);
268 sk_write(s, NULL, 0);