#include "system.h"
+#include <assert.h>
+
#include "cipher.h"
#include "connection.h"
#include "logger.h"
#include "net.h"
#include "protocol.h"
#include "utils.h"
+#include "proxy.h"
#ifndef MIN
static ssize_t MIN(ssize_t x, ssize_t y) {
#ifdef DISABLE_LEGACY
return false;
#else
+ assert(c->legacy);
- if(length > c->outbudget) {
+ if(!decrease_budget(&c->legacy->out, length)) {
logger(DEBUG_META, LOG_ERR, "Byte limit exceeded for encryption to %s (%s)", c->name, c->hostname);
return false;
- } else {
- c->outbudget -= length;
}
size_t outlen = length;
- if(!cipher_encrypt(&c->outcipher, buffer, length, buffer_prepare(&c->outbuf, length), &outlen, false) || outlen != length) {
+ if(!cipher_encrypt(&c->legacy->out.cipher, buffer, length, buffer_prepare(&c->outbuf, length), &outlen, false) || outlen != length) {
logger(DEBUG_ALWAYS, LOG_ERR, "Error while encrypting metadata to %s (%s)",
c->name, c->hostname);
return false;
#ifdef DISABLE_LEGACY
return false;
#else
+ assert(c->legacy);
- if((size_t)inlen > c->inbudget) {
+ if(!decrease_budget(&c->legacy->in, (size_t) inlen)) {
logger(DEBUG_META, LOG_ERR, "Byte limit exceeded for decryption from %s (%s)", c->name, c->hostname);
return false;
- } else {
- c->inbudget -= inlen;
}
size_t outlen = inlen;
- if(!cipher_decrypt(&c->incipher, bufp, inlen, buffer_prepare(&c->inbuf, inlen), &outlen, false) || (size_t)inlen != outlen) {
+ if(!cipher_decrypt(&c->legacy->in.cipher, bufp, inlen, buffer_prepare(&c->inbuf, inlen), &outlen, false) || (size_t)inlen != outlen) {
logger(DEBUG_ALWAYS, LOG_ERR, "Error while decrypting metadata from %s (%s)",
c->name, c->hostname);
return false;
}
if(!c->node) {
- if(c->outgoing && proxytype == PROXY_SOCKS4 && c->allow_request == ID) {
- if(tcpbuffer[0] == 0 && tcpbuffer[1] == 0x5a) {
- logger(DEBUG_CONNECTIONS, LOG_DEBUG, "Proxy request granted");
- } else {
- logger(DEBUG_CONNECTIONS, LOG_ERR, "Proxy request rejected");
- return false;
- }
- } else if(c->outgoing && proxytype == PROXY_SOCKS5 && c->allow_request == ID) {
- if(tcpbuffer[0] != 5) {
- logger(DEBUG_CONNECTIONS, LOG_ERR, "Invalid response from proxy server");
- return false;
- }
-
- if(tcpbuffer[1] == (char)0xff) {
- logger(DEBUG_CONNECTIONS, LOG_ERR, "Proxy request rejected: unsuitable authentication method");
- return false;
- }
-
- if(tcpbuffer[2] != 5) {
- logger(DEBUG_CONNECTIONS, LOG_ERR, "Invalid response from proxy server");
- return false;
- }
-
- if(tcpbuffer[3] == 0) {
- logger(DEBUG_CONNECTIONS, LOG_DEBUG, "Proxy request granted");
- } else {
- logger(DEBUG_CONNECTIONS, LOG_DEBUG, "Proxy request rejected");
+ if(c->outgoing && c->allow_request == ID && (proxytype == PROXY_SOCKS4 || proxytype == PROXY_SOCKS5)) {
+ if(!check_socks_resp(proxytype, tcpbuffer, c->tcplen)) {
return false;
}
} else {