/*
meta.c -- handle the meta communication
- Copyright (C) 2000-2013 Guus Sliepen <guus@tinc-vpn.org>,
- 2000-2005 Ivo Timmermans
- 2006 Scott Lamb <slamb@slamb.org>
+ Copyright (C) 2014 Guus Sliepen <guus@meshlink.io>,
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include "system.h"
-#include "cipher.h"
#include "connection.h"
#include "logger.h"
+#include "meshlink_internal.h"
#include "meta.h"
#include "net.h"
#include "protocol.h"
logger(DEBUG_META, LOG_DEBUG, "Sending %d bytes of metadata to %s (%s)", length,
c->name, c->hostname);
- if(c->protocol_minor >= 2)
- return sptps_send_record(&c->sptps, 0, buffer, length);
-
- /* Add our data to buffer */
- if(c->status.encryptout) {
- size_t outlen = length;
-
- if(!cipher_encrypt(c->outcipher, 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;
- }
- } else {
+ if(c->allow_request == ID) {
buffer_add(&c->outbuf, buffer, length);
+ io_set(&c->io, IO_READ | IO_WRITE);
+ return true;
}
- io_set(&c->io, IO_READ | IO_WRITE);
-
- return true;
+ return sptps_send_record(&c->sptps, 0, buffer, length);
}
void broadcast_meta(connection_t *from, const char *buffer, int length) {
- for list_each(connection_t, c, connection_list)
+ for list_each(connection_t, c, mesh->connections)
if(c != from && c->status.active)
send_meta(c, buffer, length);
}
return false;
}
- do {
- if(c->protocol_minor >= 2)
- return sptps_receive_data(&c->sptps, bufp, inlen);
-
- if(!c->status.decryptin) {
- endp = memchr(bufp, '\n', inlen);
- if(endp)
- endp++;
- else
- endp = bufp + inlen;
-
- buffer_add(&c->inbuf, bufp, endp - bufp);
-
- inlen -= endp - bufp;
- bufp = endp;
- } else {
- size_t outlen = inlen;
+ if(c->allow_request == ID) {
+ endp = memchr(bufp, '\n', inlen);
+ if(endp)
+ endp++;
+ else
+ endp = bufp + inlen;
- if(!cipher_decrypt(c->incipher, bufp, inlen, buffer_prepare(&c->inbuf, inlen), &outlen, false) || inlen != outlen) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Error while decrypting metadata from %s (%s)",
- c->name, c->hostname);
- return false;
- }
+ buffer_add(&c->inbuf, bufp, endp - bufp);
- inlen = 0;
- }
+ inlen -= endp - bufp;
+ bufp = endp;
while(c->inbuf.len) {
- /* Are we receiving a TCPpacket? */
-
- if(c->tcplen) {
- char *tcpbuffer = buffer_read(&c->inbuf, c->tcplen);
- if(!tcpbuffer)
- break;
-
- 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");
- return false;
- }
- } else {
- logger(DEBUG_CONNECTIONS, LOG_ERR, "c->tcplen set but c->node is NULL!");
- abort();
- }
- } else {
- if(c->allow_request == ALL) {
- receive_tcppacket(c, tcpbuffer, c->tcplen);
- } else {
- logger(DEBUG_CONNECTIONS, LOG_ERR, "Got unauthorized TCP packet from %s (%s)", c->name, c->hostname);
- return false;
- }
- }
-
- c->tcplen = 0;
- }
-
- /* Otherwise we are waiting for a request */
-
char *request = buffer_readline(&c->inbuf);
if(request) {
bool result = receive_request(c, request);
break;
}
}
- } while(inlen);
- return true;
+ return true;
+ }
+
+ return sptps_receive_data(&c->sptps, bufp, inlen);
}