/*
meta.c -- handle the meta communication
- Copyright (C) 2000 Guus Sliepen <guus@sliepen.warande.net>,
- 2000 Ivo Timmermans <itimmermans@bigfoot.com>
+ Copyright (C) 2014-2017 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 1.1.2.8 2000/10/29 22:55:14 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 "config.h"
-#include <utils.h>
-
-#include <errno.h>
-#include <syslog.h>
-#include <sys/signal.h>
-#include <sys/socket.h>
-#include <openssl/evp.h>
-#include <unistd.h>
-#include <string.h>
+#include "system.h"
+#include "connection.h"
+#include "logger.h"
+#include "meshlink_internal.h"
+#include "meta.h"
#include "net.h"
-#include "system.h"
#include "protocol.h"
+#include "utils.h"
+#include "xalloc.h"
+
+bool send_meta_sptps(void *handle, uint8_t type, const void *buffer, size_t length) {
+ (void)type;
+
+ assert(handle);
+ assert(buffer);
+ assert(length);
+
+ connection_t *c = handle;
+ meshlink_handle_t *mesh = c->mesh;
+
+ buffer_add(&c->outbuf, (const char *)buffer, length);
+ io_set(&mesh->loop, &c->io, IO_READ | IO_WRITE);
+
+ return true;
+}
-int send_meta(conn_list_t *cl, char *buffer, int length)
-{
- char outbuf[MAXBUFSIZE];
- char *bufp;
- int outlen;
-cp
- if(debug_lvl >= DEBUG_META)
- syslog(LOG_DEBUG, _("Sending %d bytes of metadata to %s (%s): %s"), length,
- cl->name, cl->hostname, buffer);
-
- buffer[length-1]='\n';
-
- if(cl->status.encryptout)
- {
- EVP_EncryptUpdate(cl->cipher_outctx, outbuf, &outlen, buffer, length);
- bufp = outbuf;
- length = outlen;
- }
- else
- bufp = buffer;
-
- if(write(cl->meta_socket, bufp, length) < 0)
- {
- syslog(LOG_ERR, _("Sending meta data to %s (%s) failed: %m"), cl->name, cl->hostname);
- return -1;
- }
-cp
- return 0;
+bool send_meta(meshlink_handle_t *mesh, connection_t *c, const char *buffer, int length) {
+ assert(c);
+ assert(buffer);
+ assert(length);
+
+ logger(mesh, MESHLINK_DEBUG, "Sending %d bytes of metadata to %s", length, c->name);
+
+ if(c->allow_request == ID) {
+ buffer_add(&c->outbuf, buffer, length);
+ io_set(&mesh->loop, &c->io, IO_READ | IO_WRITE);
+ return true;
+ }
+
+ return sptps_send_record(&c->sptps, 0, buffer, length);
+}
+
+void broadcast_meta(meshlink_handle_t *mesh, connection_t *from, const char *buffer, int length) {
+ assert(buffer);
+ assert(length);
+
+ for list_each(connection_t, c, mesh->connections)
+ if(c != from && c->status.active) {
+ send_meta(mesh, c, buffer, length);
+ }
}
-int broadcast_meta(conn_list_t *cl, char *buffer, int length)
-{
- conn_list_t *p;
-cp
- for(p = conn_list; p != NULL; p = p->next)
- if(p != cl && p->status.meta && p->status.active)
- send_meta(p, buffer, length);
-cp
- return 0;
+void broadcast_submesh_meta(meshlink_handle_t *mesh, connection_t *from, const submesh_t *s, const char *buffer, int length) {
+ assert(buffer);
+ assert(length);
+
+ for list_each(connection_t, c, mesh->connections)
+ if(c != from && c->status.active) {
+ if(c->node && submesh_allows_node(s, c->node)) {
+ send_meta(mesh, c, buffer, length);
+ }
+ }
}
-int receive_meta(conn_list_t *cl)
-{
- int x, l = sizeof(x);
- int oldlen, i;
- int lenin = 0;
- char inbuf[MAXBUFSIZE];
- char *bufp;
-cp
- if(getsockopt(cl->meta_socket, SOL_SOCKET, SO_ERROR, &x, &l) < 0)
- {
- syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m %s (%s)"), __FILE__, __LINE__, cl->meta_socket,
- cl->name, cl->hostname);
- return -1;
- }
- if(x)
- {
- syslog(LOG_ERR, _("Metadata socket error for %s (%s): %s"),
- cl->name, cl->hostname, strerror(x));
- return -1;
- }
-
- if(cl->status.decryptin)
- bufp = inbuf;
- else
- bufp = cl->buffer + cl->buflen;
-
- lenin = read(cl->meta_socket, bufp, MAXBUFSIZE - cl->buflen);
-
- if(lenin<=0)
- {
- if(errno==EINTR)
- return 0;
- if(errno==0)
- {
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_NOTICE, _("Connection closed by %s (%s)"),
- cl->name, cl->hostname);
- }
- else
- syslog(LOG_ERR, _("Metadata socket read error for %s (%s): %m"),
- cl->name, cl->hostname);
- return -1;
- }
-
- if(cl->status.decryptin)
- {
- EVP_DecryptUpdate(cl->cipher_inctx, cl->buffer + cl->buflen, &lenin, inbuf, lenin);
- }
-
- oldlen = cl->buflen;
- cl->buflen += lenin;
-
- for(;;)
- {
- cl->reqlen = 0;
-
- for(i = oldlen; i < cl->buflen; i++)
- {
- if(cl->buffer[i] == '\n')
- {
- cl->buffer[i] = 0; /* replace end-of-line by end-of-string so we can use sscanf */
- cl->reqlen = i + 1;
- break;
- }
- }
-
- if(cl->reqlen)
- {
- if(debug_lvl >= DEBUG_META)
- syslog(LOG_DEBUG, _("Got request from %s (%s): %s"),
- cl->name, cl->hostname, cl->buffer);
-
- if(receive_request(cl))
- return -1;
-
- cl->buflen -= cl->reqlen;
- memmove(cl->buffer, cl->buffer + cl->reqlen, cl->buflen);
- oldlen = 0;
- }
- else
- {
- break;
- }
- }
-
- if(cl->buflen >= MAXBUFSIZE)
- {
- syslog(LOG_ERR, _("Metadata read buffer overflow for %s (%s)"),
- cl->name, cl->hostname);
- return -1;
- }
-
- cl->last_ping_time = time(NULL);
- cl->want_ping = 0;
-cp
- return 0;
+bool receive_meta_sptps(void *handle, uint8_t type, const void *data, uint16_t length) {
+ assert(handle);
+ assert(!length || data);
+
+ connection_t *c = handle;
+ meshlink_handle_t *mesh = c->mesh;
+ char *request = (char *)data;
+
+ if(!c) {
+ logger(mesh, MESHLINK_ERROR, "receive_meta_sptps() called with NULL pointer!");
+ abort();
+ }
+
+ if(type == SPTPS_HANDSHAKE) {
+ if(c->allow_request == ACK) {
+ return send_ack(mesh, c);
+ } else {
+ return true;
+ }
+ }
+
+ if(!request) {
+ return true;
+ }
+
+ /* Are we receiving a TCPpacket? */
+
+ if(c->tcplen) {
+ abort(); // TODO: get rid of tcplen altogether
+ }
+
+ /* Change newline to null byte, just like non-SPTPS requests */
+
+ if(request[length - 1] == '\n') {
+ request[length - 1] = 0;
+ }
+
+ /* Otherwise we are waiting for a request */
+
+ return receive_request(mesh, c, request);
+}
+
+bool receive_meta(meshlink_handle_t *mesh, connection_t *c) {
+ int inlen;
+ char inbuf[MAXBUFSIZE];
+
+ inlen = recv(c->socket, inbuf, sizeof(inbuf), 0);
+
+ if(inlen <= 0) {
+ if(!inlen || !errno) {
+ logger(mesh, MESHLINK_INFO, "Connection closed by %s", c->name);
+ } else if(sockwouldblock(sockerrno)) {
+ return true;
+ } else {
+ logger(mesh, MESHLINK_ERROR, "Metadata socket read error for %s: %s", c->name, sockstrerror(sockerrno));
+ }
+
+ return false;
+ }
+
+ if(c->allow_request == ID) {
+ buffer_add(&c->inbuf, inbuf, inlen);
+
+ char *request = buffer_readline(&c->inbuf);
+
+ if(request) {
+ if(!receive_request(mesh, c, request) || c->allow_request == ID) {
+ return false;
+ }
+
+ int left = c->inbuf.len - c->inbuf.offset;
+
+ if(left > 0) {
+ return sptps_receive_data(&c->sptps, buffer_read(&c->inbuf, left), left);
+ } else {
+ return true;
+ }
+ }
+
+ if(c->inbuf.len >= sizeof(inbuf)) {
+ logger(mesh, MESHLINK_ERROR, "Input buffer full for %s", c->name);
+ return false;
+ } else {
+ return true;
+ }
+ }
+
+ return sptps_receive_data(&c->sptps, inbuf, inlen);
}