--- /dev/null
+#include <windows.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "putty.h"
+#include "ssh.h"
+
+#ifndef FALSE
+#define FALSE 0
+#endif
+#ifndef TRUE
+#define TRUE 1
+#endif
+
+#define GET_32BIT_LSB_FIRST(cp) \
+ (((unsigned long)(unsigned char)(cp)[0]) | \
+ ((unsigned long)(unsigned char)(cp)[1] << 8) | \
+ ((unsigned long)(unsigned char)(cp)[2] << 16) | \
+ ((unsigned long)(unsigned char)(cp)[3] << 24))
+
+#define PUT_32BIT_LSB_FIRST(cp, value) ( \
+ (cp)[0] = (value), \
+ (cp)[1] = (value) >> 8, \
+ (cp)[2] = (value) >> 16, \
+ (cp)[3] = (value) >> 24 )
+
+#define GET_16BIT_LSB_FIRST(cp) \
+ (((unsigned long)(unsigned char)(cp)[0]) | \
+ ((unsigned long)(unsigned char)(cp)[1] << 8))
+
+#define PUT_16BIT_LSB_FIRST(cp, value) ( \
+ (cp)[0] = (value), \
+ (cp)[1] = (value) >> 8 )
+
+#define GET_32BIT_MSB_FIRST(cp) \
+ (((unsigned long)(unsigned char)(cp)[0] << 24) | \
+ ((unsigned long)(unsigned char)(cp)[1] << 16) | \
+ ((unsigned long)(unsigned char)(cp)[2] << 8) | \
+ ((unsigned long)(unsigned char)(cp)[3]))
+
+#define PUT_32BIT_MSB_FIRST(cp, value) ( \
+ (cp)[0] = (value) >> 24, \
+ (cp)[1] = (value) >> 16, \
+ (cp)[2] = (value) >> 8, \
+ (cp)[3] = (value) )
+
+#define GET_16BIT_MSB_FIRST(cp) \
+ (((unsigned long)(unsigned char)(cp)[0] << 8) | \
+ ((unsigned long)(unsigned char)(cp)[1]))
+
+#define PUT_16BIT_MSB_FIRST(cp, value) ( \
+ (cp)[0] = (value) >> 8, \
+ (cp)[1] = (value) )
+
+extern void sshfwd_close(void *);
+extern void sshfwd_write(void *, char *, int);
+
+struct pfwd_queue {
+ struct pfwd_queue *next;
+ char *buf;
+};
+
+struct PFwdPrivate {
+ struct plug_function_table *fn;
+ /* the above variable absolutely *must* be the first in this structure */
+ void *c; /* (channel) data used by ssh.c */
+ Socket s;
+ char hostname[128];
+ int port;
+ int ready;
+ struct pfwd_queue *waiting;
+};
+
+void pfd_close(Socket s);
+
+
+static int pfd_closing(Plug plug, char *error_msg, int error_code,
+ int calling_back)
+{
+ struct PFwdPrivate *pr = (struct PFwdPrivate *) plug;
+
+ /*
+ * We have no way to communicate down the forwarded connection,
+ * so if an error occurred on the socket, we just ignore it
+ * and treat it like a proper close.
+ */
+ sshfwd_close(pr->c);
+ pfd_close(pr->s);
+ return 1;
+}
+
+static int pfd_receive(Plug plug, int urgent, char *data, int len)
+{
+ struct PFwdPrivate *pr = (struct PFwdPrivate *) plug;
+
+ if (pr->ready)
+ sshfwd_write(pr->c, data, len);
+ return 1;
+}
+
+/*
+ * Called when receiving a PORT OPEN from the server
+ */
+char *pfd_newconnect(Socket *s, char *hostname, int port, void *c)
+{
+ static struct plug_function_table fn_table = {
+ pfd_closing,
+ pfd_receive,
+ NULL
+ };
+
+ SockAddr addr;
+ char *err, *dummy_realhost;
+ struct PFwdPrivate *pr;
+
+ /*
+ * Try to find host.
+ */
+ addr = sk_namelookup(hostname, &dummy_realhost);
+ if ((err = sk_addr_error(addr)))
+ return err;
+
+ /*
+ * Open socket.
+ */
+ pr = (struct PFwdPrivate *) smalloc(sizeof(struct PFwdPrivate));
+ pr->fn = &fn_table;
+ pr->ready = 1;
+ pr->c = c;
+
+ pr->s = *s = sk_new(addr, port, 0, 1, (Plug) pr);
+ if ((err = sk_socket_error(*s))) {
+ sfree(pr);
+ return err;
+ }
+
+ sk_set_private_ptr(*s, pr);
+ sk_addr_free(addr);
+ return NULL;
+}
+
+/*
+ called when someone connects to the local port
+ */
+
+static int pfd_accepting(Plug p, struct sockaddr *addr, void *sock)
+{
+ /* for now always accept this socket */
+ static struct plug_function_table fn_table = {
+ pfd_closing,
+ pfd_receive,
+ NULL
+ };
+ struct PFwdPrivate *pr, *org;
+ struct sockaddr_in *sin = (struct sockaddr_in *)addr;
+ Socket s;
+ char *err;
+
+ if (ntohl(sin->sin_addr.s_addr) != 0x7F000001 && !cfg.lport_acceptall)
+ return 1; /* denied */
+
+ org = (struct PFwdPrivate *)p;
+ pr = (struct PFwdPrivate *) smalloc(sizeof(struct PFwdPrivate));
+ pr->fn = &fn_table;
+
+ pr->c = NULL;
+
+ pr->s = s = sk_register(sock, (Plug) pr);
+ if ((err = sk_socket_error(s))) {
+ sfree(pr);
+ return err != NULL;
+ }
+
+ pr->c = new_sock_channel(s);
+
+ strcpy(pr->hostname, org->hostname);
+ pr->port = org->port;
+ pr->ready = 0;
+ pr->waiting = NULL;
+
+ sk_set_private_ptr(s, pr);
+
+ if (pr->c == NULL) {
+ sfree(pr);
+ return 1;
+ } else {
+ /* asks to forward to the specified host/port for this */
+ ssh_send_port_open(pr->c, pr->hostname, pr->port, "forwarding");
+ }
+
+ return 0;
+}
+
+
+/* Add a new forwarding from port -> desthost:destport
+ sets up a listenner on the local machine on port
+ */
+char *pfd_addforward(char *desthost, int destport, int port)
+{
+ static struct plug_function_table fn_table = {
+ pfd_closing,
+ pfd_receive, /* should not happen... */
+ pfd_accepting
+ };
+
+ char *err;
+ struct PFwdPrivate *pr;
+ Socket s;
+
+ /*
+ * Open socket.
+ */
+ pr = (struct PFwdPrivate *) smalloc(sizeof(struct PFwdPrivate));
+ pr->fn = &fn_table;
+ pr->c = NULL;
+ strcpy(pr->hostname, desthost);
+ pr->port = destport;
+ pr->ready = 0;
+ pr->waiting = NULL;
+
+ pr->s = s = sk_newlistenner(port, (Plug) pr);
+ if ((err = sk_socket_error(s))) {
+ sfree(pr);
+ return err;
+ }
+
+ sk_set_private_ptr(s, pr);
+
+ return NULL;
+}
+
+void pfd_close(Socket s)
+{
+ struct PFwdPrivate *pr;
+
+ if (!s)
+ return;
+
+ pr = (struct PFwdPrivate *) sk_get_private_ptr(s);
+
+ sfree(pr);
+
+ sk_close(s);
+}
+
+/*
+ * Called to send data down the raw connection.
+ */
+void pfd_send(Socket s, char *data, int len)
+{
+ struct PFwdPrivate *pr = (struct PFwdPrivate *) sk_get_private_ptr(s);
+
+ if (s == NULL)
+ return;
+
+ sk_write(s, data, len);
+}
+
+
+void pfd_confirm(Socket s)
+{
+ struct PFwdPrivate *pr = (struct PFwdPrivate *) sk_get_private_ptr(s);
+
+ if (s == NULL)
+ return;
+
+ pr->ready = 1;
+ sk_set_frozen(s, 0);
+ sk_write(s, NULL, 0);
+}
projects / u / mdw / putty / commitdiff