/*
meta.c -- handle the meta communication
- Copyright (C) 2000-2003 Guus Sliepen <guus@sliepen.eu.org>,
- 2000-2003 Ivo Timmermans <ivo@o2w.nl>
+ 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
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- $Id: meta.c,v 1.1.2.44 2003/08/28 21:05:10 guus Exp $
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "system.h"
-#include <openssl/evp.h>
-
-#include "avl_tree.h"
#include "connection.h"
#include "logger.h"
+#include "meshlink_internal.h"
#include "meta.h"
#include "net.h"
#include "protocol.h"
-#include "system.h"
#include "utils.h"
+#include "xalloc.h"
-bool send_meta(connection_t *c, const char *buffer, int length)
-{
- const char *bufp;
- int outlen;
- char outbuf[MAXBUFSIZE];
- int result;
+bool send_meta_sptps(void *handle, uint8_t type, const char *buffer, size_t length) {
+ connection_t *c = handle;
- cp();
+ if(!c) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "send_meta_sptps() called with NULL pointer!");
+ abort();
+ }
- ifdebug(META) logger(LOG_DEBUG, _("Sending %d bytes of 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->status.encryptout) {
- EVP_EncryptUpdate(c->outctx, outbuf, &outlen, buffer, length);
- bufp = outbuf;
- length = outlen;
- } else
- bufp = buffer;
-
- while(length) {
- result = send(c->socket, bufp, length, 0);
- if(result <= 0) {
- if(!errno || errno == EPIPE) {
- ifdebug(CONNECTIONS) logger(LOG_NOTICE, _("Connection closed by %s (%s)"),
- c->name, c->hostname);
- } else if(errno == EINTR)
- continue;
- else
- logger(LOG_ERR, _("Sending meta data to %s (%s) failed: %s"), c->name,
- c->hostname, strerror(errno));
- return false;
- }
- bufp += result;
- length -= result;
- }
-
return true;
}
-void broadcast_meta(connection_t *from, const char *buffer, int length)
-{
- avl_node_t *node;
- connection_t *c;
+bool send_meta(connection_t *c, const char *buffer, int length) {
+ if(!c) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "send_meta() called with NULL pointer!");
+ abort();
+ }
- cp();
+ logger(DEBUG_META, LOG_DEBUG, "Sending %d bytes of metadata to %s (%s)", length,
+ c->name, c->hostname);
- for(node = connection_tree->head; node; node = node->next) {
- c = node->data;
+ if(c->allow_request == ID) {
+ buffer_add(&c->outbuf, buffer, length);
+ 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, 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)
-{
- int oldlen, i;
- int lenin, reqlen;
- bool decrypted = false;
+bool receive_meta(connection_t *c) {
+ int inlen;
char inbuf[MAXBUFSIZE];
-
- cp();
+ char *bufp = inbuf, *endp;
/* Strategy:
- Read as much as possible from the TCP socket in one go.
- If not, keep stuff in buffer and exit.
*/
- lenin = recv(c->socket, c->buffer + c->buflen, MAXBUFSIZE - c->buflen, 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;
+ }
- if(lenin <= 0) {
- if(!lenin || !errno) {
- ifdebug(CONNECTIONS) logger(LOG_NOTICE, _("Connection closed by %s (%s)"),
+ inlen = recv(c->socket, inbuf, sizeof inbuf - c->inbuf.len, 0);
+
+ if(inlen <= 0) {
+ if(!inlen || !errno) {
+ logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Connection closed by %s (%s)",
c->name, c->hostname);
- } else if(errno == EINTR)
+ } else if(sockwouldblock(sockerrno))
return true;
else
- logger(LOG_ERR, _("Metadata socket read error for %s (%s): %s"),
- c->name, c->hostname, strerror(errno));
-
+ logger(DEBUG_ALWAYS, LOG_ERR, "Metadata socket read error for %s (%s): %s",
+ c->name, c->hostname, sockstrerror(sockerrno));
return false;
}
- oldlen = c->buflen;
- c->buflen += lenin;
-
- while(lenin) {
- /* Decrypt */
-
- if(c->status.decryptin && !decrypted) {
- EVP_DecryptUpdate(c->inctx, inbuf, &lenin, c->buffer + oldlen, lenin);
- memcpy(c->buffer + oldlen, inbuf, lenin);
- decrypted = true;
- }
+ if(c->allow_request == ID) {
+ endp = memchr(bufp, '\n', inlen);
+ if(endp)
+ endp++;
+ else
+ endp = bufp + inlen;
- /* Are we receiving a TCPpacket? */
+ buffer_add(&c->inbuf, bufp, endp - bufp);
- if(c->tcplen) {
- if(c->tcplen <= c->buflen) {
- receive_tcppacket(c, c->buffer, c->tcplen);
+ inlen -= endp - bufp;
+ bufp = endp;
- c->buflen -= c->tcplen;
- lenin -= c->tcplen;
- memmove(c->buffer, c->buffer + c->tcplen, c->buflen);
- oldlen = 0;
- c->tcplen = 0;
+ while(c->inbuf.len) {
+ char *request = buffer_readline(&c->inbuf);
+ if(request) {
+ bool result = receive_request(c, request);
+ if(!result)
+ return false;
continue;
} else {
break;
}
}
- /* Otherwise we are waiting for a request */
-
- reqlen = 0;
-
- for(i = oldlen; i < c->buflen; i++) {
- if(c->buffer[i] == '\n') {
- c->buffer[i] = '\0'; /* replace end-of-line by end-of-string so we can use sscanf */
- reqlen = i + 1;
- break;
- }
- }
-
- if(reqlen) {
- c->reqlen = reqlen;
- if(!receive_request(c))
- return false;
-
- c->buflen -= reqlen;
- lenin -= reqlen;
- memmove(c->buffer, c->buffer + reqlen, c->buflen);
- oldlen = 0;
- continue;
- } else {
- break;
- }
+ return true;
}
- if(c->buflen >= MAXBUFSIZE) {
- logger(LOG_ERR, _("Metadata read buffer overflow for %s (%s)"),
- c->name, c->hostname);
- return false;
- }
-
- c->last_ping_time = now;
-
- return true;
+ return sptps_receive_data(&c->sptps, bufp, inlen);
}
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