/*
meta.c -- handle the meta communication
- Copyright (C) 2000-2009 Guus Sliepen <guus@tinc-vpn.org>,
+ Copyright (C) 2000-2014 Guus Sliepen <guus@tinc-vpn.org>,
2000-2005 Ivo Timmermans
2006 Scott Lamb <slamb@slamb.org>
#include "system.h"
-#include "splay_tree.h"
#include "cipher.h"
#include "connection.h"
#include "logger.h"
#include "utils.h"
#include "xalloc.h"
-bool send_meta_sptps(void *handle, const char *buffer, size_t length) {
+#ifndef MIN
+#define MIN(x, y) (((x)<(y))?(x):(y))
+#endif
+
+bool send_meta_sptps(void *handle, uint8_t type, const void *buffer, size_t length) {
connection_t *c = handle;
if(!c) {
- logger(LOG_ERR, "send_meta_sptps() called with NULL pointer!");
+ logger(DEBUG_ALWAYS, LOG_ERR, "send_meta_sptps() called with NULL pointer!");
abort();
}
- logger(LOG_DEBUG, "send_meta_sptps(%s, %p, %zu)", c->name, buffer, length);
-
buffer_add(&c->outbuf, buffer, length);
- event_add(&c->outevent, NULL);
+ io_set(&c->io, IO_READ | IO_WRITE);
return true;
}
bool send_meta(connection_t *c, const char *buffer, int length) {
if(!c) {
- logger(LOG_ERR, "send_meta() called with NULL pointer!");
+ logger(DEBUG_ALWAYS, LOG_ERR, "send_meta() called with NULL pointer!");
abort();
}
- ifdebug(META) logger(LOG_DEBUG, "Sending %d bytes of metadata to %s (%s)", length,
+ logger(DEBUG_META, LOG_DEBUG, "Sending %d bytes of metadata to %s (%s)", length,
c->name, c->hostname);
if(c->protocol_minor >= 2)
- return send_record(&c->sptps, 0, buffer, length);
+ return sptps_send_record(&c->sptps, 0, buffer, length);
/* Add our data to buffer */
if(c->status.encryptout) {
+#ifdef DISABLE_LEGACY
+ return false;
+#else
size_t outlen = length;
- if(!cipher_encrypt(&c->outcipher, buffer, length, buffer_prepare(&c->outbuf, length), &outlen, false) || outlen != length) {
- logger(LOG_ERR, "Error while encrypting metadata to %s (%s)",
+ 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;
}
-
+#endif
} else {
buffer_add(&c->outbuf, buffer, length);
}
- event_add(&c->outevent, NULL);
+ io_set(&c->io, IO_READ | IO_WRITE);
return true;
}
-void broadcast_meta(connection_t *from, const char *buffer, int length) {
- splay_node_t *node;
- connection_t *c;
+void send_meta_raw(connection_t *c, const char *buffer, int length) {
+ if(!c) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "send_meta() called with NULL pointer!");
+ abort();
+ }
- for(node = connection_tree->head; node; node = node->next) {
- c = node->data;
+ logger(DEBUG_META, LOG_DEBUG, "Sending %d bytes of raw metadata to %s (%s)", length,
+ c->name, c->hostname);
+
+ buffer_add(&c->outbuf, buffer, length);
+
+ io_set(&c->io, IO_READ | IO_WRITE);
+}
- if(c != from && c->status.active)
+void broadcast_meta(connection_t *from, const char *buffer, int length) {
+ for list_each(connection_t, c, connection_list)
+ if(c != from && c->edge)
send_meta(c, buffer, length);
- }
}
-bool receive_meta_sptps(void *handle, uint8_t type, const char *data, uint16_t length) {
+bool receive_meta_sptps(void *handle, uint8_t type, const void *vdata, uint16_t length) {
+ const char *data = vdata;
connection_t *c = handle;
if(!c) {
- logger(LOG_ERR, "receive_meta_sptps() called with NULL pointer!");
+ logger(DEBUG_ALWAYS, LOG_ERR, "receive_meta_sptps() called with NULL pointer!");
abort();
}
- logger(LOG_DEBUG, "receive_meta_sptps(%s, %d, %p, %hu)", c->name, type, data, length);
-
if(type == SPTPS_HANDSHAKE) {
if(c->allow_request == ACK)
return send_ack(c);
return true;
}
+ /* Change newline to null byte, just like non-SPTPS requests */
+
+ if(data[length - 1] == '\n')
+ ((char *)data)[length - 1] = 0;
+
/* Otherwise we are waiting for a request */
return receive_request(c, data);
buffer_compact(&c->inbuf, MAXBUFSIZE);
if(sizeof inbuf <= c->inbuf.len) {
- logger(LOG_ERR, "Input buffer full for %s (%s)", c->name, c->hostname);
+ logger(DEBUG_ALWAYS, LOG_ERR, "Input buffer full for %s (%s)", c->name, c->hostname);
return false;
}
inlen = recv(c->socket, inbuf, sizeof inbuf - c->inbuf.len, 0);
if(inlen <= 0) {
- if(!inlen || !errno) {
- ifdebug(CONNECTIONS) logger(LOG_NOTICE, "Connection closed by %s (%s)",
+ if(!inlen || !sockerrno) {
+ logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Connection closed by %s (%s)",
c->name, c->hostname);
} else if(sockwouldblock(sockerrno))
return true;
else
- logger(LOG_ERR, "Metadata socket read error for %s (%s): %s",
+ logger(DEBUG_ALWAYS, LOG_ERR, "Metadata socket read error for %s (%s): %s",
c->name, c->hostname, sockstrerror(sockerrno));
return false;
}
do {
+ /* Are we receiving a SPTPS packet? */
+
+ if(c->sptpslen) {
+ int len = MIN(inlen, c->sptpslen - c->inbuf.len);
+ buffer_add(&c->inbuf, bufp, len);
+
+ char *sptpspacket = buffer_read(&c->inbuf, c->sptpslen);
+ if(!sptpspacket)
+ return true;
+
+ if(!receive_tcppacket_sptps(c, sptpspacket, c->sptpslen))
+ return false;
+ c->sptpslen = 0;
+
+ bufp += len;
+ inlen -= len;
+ continue;
+ }
+
if(c->protocol_minor >= 2) {
- logger(LOG_DEBUG, "Receiving %d bytes of SPTPS data", inlen);
- return receive_data(&c->sptps, bufp, inlen);
+ int len = sptps_receive_data(&c->sptps, bufp, inlen);
+ if(!len)
+ return false;
+ bufp += len;
+ inlen -= len;
+ continue;
}
if(!c->status.decryptin) {
inlen -= endp - bufp;
bufp = endp;
} else {
+#ifdef DISABLE_LEGACY
+ return false;
+#else
size_t outlen = inlen;
- ifdebug(META) logger(LOG_DEBUG, "Received encrypted %d bytes", inlen);
- if(!cipher_decrypt(&c->incipher, bufp, inlen, buffer_prepare(&c->inbuf, inlen), &outlen, false) || inlen != outlen) {
- logger(LOG_ERR, "Error while decrypting metadata from %s (%s)",
+ 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;
}
inlen = 0;
+#endif
}
while(c->inbuf.len) {
if(c->tcplen) {
char *tcpbuffer = buffer_read(&c->inbuf, c->tcplen);
- if(tcpbuffer) {
- receive_tcppacket(c, tcpbuffer, c->tcplen);
- c->tcplen = 0;
- continue;
- } else {
+ 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 */
projects / tinc / blobdiff