* code and the higher level backend.
*/
-#include <windows.h>
-
#include <assert.h>
+#include <ctype.h>
+#include <string.h>
#define DEFINE_PLUG_METHOD_MACROS
#include "putty.h"
{
void *data;
int len;
-
+ long output_before, output_after;
+
p->state = PROXY_STATE_ACTIVE;
- /* let's try to keep extra receive events from coming through */
+ /* we want to ignore new receive events until we have sent
+ * all of our buffered receive data.
+ */
sk_set_frozen(p->sub_socket, 1);
+ /* how many bytes of output have we buffered? */
+ output_before = bufchain_size(&p->pending_oob_output_data) +
+ bufchain_size(&p->pending_output_data);
+ /* and keep track of how many bytes do not get sent. */
+ output_after = 0;
+
/* send buffered OOB writes */
while (bufchain_size(&p->pending_oob_output_data) > 0) {
bufchain_prefix(&p->pending_oob_output_data, &data, &len);
- sk_write_oob(p->sub_socket, data, len);
+ output_after += sk_write_oob(p->sub_socket, data, len);
bufchain_consume(&p->pending_oob_output_data, len);
}
- bufchain_clear(&p->pending_oob_output_data);
/* send buffered normal writes */
while (bufchain_size(&p->pending_output_data) > 0) {
bufchain_prefix(&p->pending_output_data, &data, &len);
- sk_write(p->sub_socket, data, len);
+ output_after += sk_write(p->sub_socket, data, len);
bufchain_consume(&p->pending_output_data, len);
}
- bufchain_clear(&p->pending_output_data);
+
+ /* if we managed to send any data, let the higher levels know. */
+ if (output_after < output_before)
+ plug_sent(p->plug, output_after);
/* if we were asked to flush the output during
* the proxy negotiation process, do so now.
*/
if (p->pending_flush) sk_flush(p->sub_socket);
- /* forward buffered recv data to the backend */
- while (bufchain_size(&p->pending_input_data) > 0) {
- bufchain_prefix(&p->pending_input_data, &data, &len);
- plug_receive(p->plug, 0, data, len);
- bufchain_consume(&p->pending_input_data, len);
- }
- bufchain_clear(&p->pending_input_data);
-
- /* now set the underlying socket to whatever freeze state they wanted */
- sk_set_frozen(p->sub_socket, p->freeze);
+ /* if the backend wanted the socket unfrozen, try to unfreeze.
+ * our set_frozen handler will flush buffered receive data before
+ * unfreezing the actual underlying socket.
+ */
+ if (!p->freeze)
+ sk_set_frozen((Socket)p, 0);
}
/* basic proxy socket functions */
ps->freeze = is_frozen;
return;
}
+
+ /* handle any remaining buffered recv data first */
+ if (bufchain_size(&ps->pending_input_data) > 0) {
+ ps->freeze = is_frozen;
+
+ /* loop while we still have buffered data, and while we are
+ * unfrozen. the plug_receive call in the loop could result
+ * in a call back into this function refreezing the socket,
+ * so we have to check each time.
+ */
+ while (!ps->freeze && bufchain_size(&ps->pending_input_data) > 0) {
+ void *data;
+ int len;
+ bufchain_prefix(&ps->pending_input_data, &data, &len);
+ plug_receive(ps->plug, 0, data, len);
+ bufchain_consume(&ps->pending_input_data, len);
+ }
+
+ /* if we're still frozen, we'll have to wait for another
+ * call from the backend to finish unbuffering the data.
+ */
+ if (ps->freeze) return;
+ }
+
sk_set_frozen(ps->sub_socket, is_frozen);
}
int port, int privport,
int oobinline, int nodelay, Plug plug)
{
- static struct socket_function_table socket_fn_table = {
+ static const struct socket_function_table socket_fn_table = {
sk_proxy_plug,
sk_proxy_close,
sk_proxy_write,
sk_proxy_socket_error
};
- static struct plug_function_table plug_fn_table = {
+ static const struct plug_function_table plug_fn_table = {
plug_proxy_closing,
plug_proxy_receive,
plug_proxy_sent,
ret->remote_addr = addr;
ret->remote_port = port;
+ ret->error = NULL;
+ ret->pending_flush = 0;
+ ret->freeze = 0;
+
bufchain_init(&ret->pending_input_data);
bufchain_init(&ret->pending_output_data);
bufchain_init(&ret->pending_oob_output_data);
ret->sub_socket = NULL;
ret->state = PROXY_STATE_NEW;
-
+ ret->negotiate = NULL;
+
if (cfg.proxy_type == PROXY_HTTP) {
ret->negotiate = proxy_http_negotiate;
} else if (cfg.proxy_type == PROXY_SOCKS) {
* for this proxy method, it's just a simple HTTP
* request
*/
- char buf[256], dest[64];
+ char *buf, dest[64];
sk_getaddr(p->remote_addr, dest, 64);
- sprintf(buf, "CONNECT %s:%i HTTP/1.1\r\nHost: %s:%i\r\n",
- dest, p->remote_port, dest, p->remote_port);
+ buf = dupprintf("CONNECT %s:%i HTTP/1.1\r\nHost: %s:%i\r\n",
+ dest, p->remote_port, dest, p->remote_port);
sk_write(p->sub_socket, buf, strlen(buf));
+ sfree(buf);
if (cfg.proxy_username[0] || cfg.proxy_password[0]) {
char buf[sizeof(cfg.proxy_username)+sizeof(cfg.proxy_password)];
bufchain_consume(&p->pending_input_data, eol);
if (data[status] != '2') {
/* error */
- char buf[1024];
+ char *buf;
data[eol] = '\0';
while (eol > status &&
(data[eol-1] == '\r' || data[eol-1] == '\n'))
data[--eol] = '\0';
- sprintf(buf, "Proxy error: %.900s",
- data+status);
+ buf = dupprintf("Proxy error: %s", data+status);
plug_closing(p->plug, buf, PROXY_ERROR_GENERAL, 0);
+ sfree(buf);
sfree(data);
return 1;
}
int length;
char * command;
- if (sk_addrtype(p->remote_addr) != AF_INET) {
+ if (sk_addrtype(p->remote_addr) != ADDRTYPE_IPV4) {
plug_closing(p->plug, "Proxy error: SOCKS version 4 does"
" not support IPv6", PROXY_ERROR_GENERAL, 0);
return 1;
}
length = strlen(cfg.proxy_username) + 9;
- command = (char*) malloc(length);
+ command = (char*) smalloc(length);
strcpy(command + 8, cfg.proxy_username);
command[0] = 4; /* version 4 */
sk_addrcopy(p->remote_addr, command + 4);
sk_write(p->sub_socket, command, length);
- free(command);
+ sfree(command);
p->state = 1;
return 0;
char command[22];
int len;
- if (sk_addrtype(p->remote_addr) == AF_INET) {
+ if (sk_addrtype(p->remote_addr) == ADDRTYPE_IPV6) {
len = 10;
command[3] = 1; /* IPv4 */
} else {
int so = 0, eo = 0;
/* we need to escape \\, \%, \r, \n, \t, \x??, \0???,
- * %%, %host, and %port
+ * %%, %host, %port, %user, and %pass
*/
while (cfg.proxy_telnet_command[eo] != 0) {
}
} else {
- /* % escape. we recognize %%, %host, %port. anything else,
- * we just send unescaped (including the %). */
+ /* % escape. we recognize %%, %host, %port, %user, %pass.
+ * anything else, we just send unescaped (including the %).
+ */
if (cfg.proxy_telnet_command[eo] == '%') {
sk_write(p->sub_socket, "%", 1);
eo++;
- }
+ }
else if (strnicmp(cfg.proxy_telnet_command + eo,
"host", 4) == 0) {
char dest[64];
sk_getaddr(p->remote_addr, dest, 64);
sk_write(p->sub_socket, dest, strlen(dest));
eo += 4;
- }
+ }
else if (strnicmp(cfg.proxy_telnet_command + eo,
"port", 4) == 0) {
char port[8];
sprintf(port, "%i", p->remote_port);
sk_write(p->sub_socket, port, strlen(port));
eo += 4;
- }
+ }
+ else if (strnicmp(cfg.proxy_telnet_command + eo,
+ "user", 4) == 0) {
+ sk_write(p->sub_socket, cfg.proxy_username,
+ strlen(cfg.proxy_username));
+ eo += 4;
+ }
+ else if (strnicmp(cfg.proxy_telnet_command + eo,
+ "pass", 4) == 0) {
+ sk_write(p->sub_socket, cfg.proxy_password,
+ strlen(cfg.proxy_password));
+ eo += 4;
+ }
else {
/* we don't escape this, so send the % now, and
* don't advance eo, so that we'll consider the
projects / u / mdw / putty / blobdiff