/*
meta.c -- handle the meta communication
- Copyright (C) 2000-2009 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 "splay_tree.h"
#include "cipher.h"
#include "connection.h"
#include "logger.h"
+#include "meshlink_internal.h"
#include "meta.h"
#include "net.h"
#include "protocol.h"
#include "utils.h"
#include "xalloc.h"
+bool send_meta_sptps(void *handle, uint8_t type, const char *buffer, size_t length) {
+ connection_t *c = handle;
+
+ if(!c) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "send_meta_sptps() called with NULL pointer!");
+ abort();
+ }
+
+ buffer_add(&c->outbuf, buffer, length);
+ 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);
- /* Add our data to buffer */
- if(c->status.encryptout) {
- char outbuf[length];
- size_t outlen = length;
-
- if(!cipher_encrypt(&c->outcipher, buffer, length, outbuf, &outlen, false) || outlen != length) {
- logger(LOG_ERR, "Error while encrypting metadata to %s (%s)",
- c->name, c->hostname);
- return false;
- }
-
- ifdebug(META) logger(LOG_DEBUG, "Encrypted write %p %p %p %d", c, c->buffer, outbuf, length);
- bufferevent_write(c->buffer, (void *)outbuf, length);
- ifdebug(META) logger(LOG_DEBUG, "Done.");
- } else {
- ifdebug(META) logger(LOG_DEBUG, "Unencrypted write %p %p %p %d", c, c->buffer, buffer, length);
- bufferevent_write(c->buffer, (void *)buffer, length);
- ifdebug(META) logger(LOG_DEBUG, "Done.");
+ if(c->allow_request == ID) {
+ buffer_add(&c->outbuf, buffer, length);
+ io_set(&c->io, IO_READ | IO_WRITE);
+ return true;
}
- return true;
+ return sptps_send_record(&c->sptps, 0, buffer, length);
}
void broadcast_meta(connection_t *from, const char *buffer, int length) {
- splay_node_t *node;
- connection_t *c;
-
- for(node = connection_tree->head; node; node = node->next) {
- c = node->data;
-
+ for list_each(connection_t, c, mesh->connections)
if(c != from && c->status.active)
send_meta(c, buffer, length);
+}
+
+bool receive_meta_sptps(void *handle, uint8_t type, const char *data, uint16_t length) {
+ connection_t *c = handle;
+
+ if(!c) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "receive_meta_sptps() called with NULL pointer!");
+ abort();
+ }
+
+ if(type == SPTPS_HANDSHAKE) {
+ if(c->allow_request == ACK)
+ return send_ack(c);
+ else
+ return true;
+ }
+
+ if(!data)
+ return true;
+
+ /* Are we receiving a TCPpacket? */
+
+ if(c->tcplen) {
+ if(length != c->tcplen)
+ return false;
+ receive_tcppacket(c, data, length);
+ c->tcplen = 0;
+ 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);
}
bool receive_meta(connection_t *c) {
- If not, keep stuff in buffer and exit.
*/
- inlen = recv(c->socket, inbuf, sizeof inbuf, 0);
+ buffer_compact(&c->inbuf, MAXBUFSIZE);
+
+ if(sizeof inbuf <= c->inbuf.len) {
+ 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)",
+ 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 {
- if(!c->status.decryptin) {
- endp = memchr(bufp, '\n', inlen);
- if(endp)
- endp++;
- else
- endp = bufp + inlen;
-
- evbuffer_add(c->buffer->input, bufp, endp - bufp);
-
- inlen -= endp - bufp;
- bufp = endp;
- } else {
- size_t outlen = inlen;
- ifdebug(META) logger(LOG_DEBUG, "Received encrypted %d bytes", inlen);
- evbuffer_expand(c->buffer->input, c->buffer->input->off + inlen);
-
- if(!cipher_decrypt(&c->incipher, bufp, inlen, c->buffer->input->buffer + c->buffer->input->off, &outlen, false) || inlen != outlen) {
- logger(LOG_ERR, "Error while decrypting metadata from %s (%s)",
- c->name, c->hostname);
- return false;
- }
- c->buffer->input->off += inlen;
-
- inlen = 0;
- }
+ if(c->allow_request == ID) {
+ endp = memchr(bufp, '\n', inlen);
+ if(endp)
+ endp++;
+ else
+ endp = bufp + inlen;
- while(c->buffer->input->off) {
- /* Are we receiving a TCPpacket? */
-
- if(c->tcplen) {
- if(c->tcplen <= c->buffer->input->off) {
- receive_tcppacket(c, (char *)c->buffer->input->buffer, c->tcplen);
- evbuffer_drain(c->buffer->input, c->tcplen);
- c->tcplen = 0;
- continue;
- } else {
- break;
- }
- }
+ buffer_add(&c->inbuf, bufp, endp - bufp);
- /* Otherwise we are waiting for a request */
+ inlen -= endp - bufp;
+ bufp = endp;
- char *request = evbuffer_readline(c->buffer->input);
+ while(c->inbuf.len) {
+ char *request = buffer_readline(&c->inbuf);
if(request) {
bool result = receive_request(c, request);
- free(request);
if(!result)
return false;
continue;
break;
}
}
- } while(inlen);
- return true;
+ return true;
+ }
+
+ return sptps_receive_data(&c->sptps, bufp, inlen);
}
projects / meshlink / blobdiff