2 protocol_misc.c -- handle the meta-protocol, miscellaneous functions
3 Copyright (C) 2014-2017 Guus Sliepen <guus@meshlink.io>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 #include "connection.h"
25 #include "meshlink_internal.h"
32 int maxoutbufsize = 0;
34 /* Status and error notification routines */
36 bool status_h(meshlink_handle_t *mesh, connection_t *c, const char *request) {
41 char statusstring[MAX_STRING_SIZE];
43 if(sscanf(request, "%*d %d " MAX_STRING, &statusno, statusstring) != 2) {
44 logger(mesh, MESHLINK_ERROR, "Got bad %s from %s", "STATUS", c->name);
48 logger(mesh, MESHLINK_INFO, "Status message from %s: %d: %s", c->name, statusno, statusstring);
53 bool send_error(meshlink_handle_t *mesh, connection_t *c, request_error_t err, const char *message) {
54 send_request(mesh, c, NULL, "%d %d %s", ERROR, err, message);
59 bool error_h(meshlink_handle_t *mesh, connection_t *c, const char *request) {
64 char errorstring[MAX_STRING_SIZE];
66 if(sscanf(request, "%*d %d " MAX_STRING, &err, errorstring) != 2) {
67 logger(mesh, MESHLINK_ERROR, "Got bad %s from %s", "ERROR", c->name);
71 logger(mesh, MESHLINK_INFO, "Error message from %s: %d: %s", c->name, err, errorstring);
75 if(mesh->blacklisted_cb) {
76 mesh->blacklisted_cb(mesh, (meshlink_node_t *)lookup_node(mesh, c->name));
83 bool termreq_h(meshlink_handle_t *mesh, connection_t *c, const char *request) {
94 bool send_ping(meshlink_handle_t *mesh, connection_t *c) {
95 c->status.pinged = true;
96 c->last_ping_time = mesh->loop.now.tv_sec;
98 return send_request(mesh, c, NULL, "%d", PING);
101 bool ping_h(meshlink_handle_t *mesh, connection_t *c, const char *request) {
107 return send_pong(mesh, c);
110 bool send_pong(meshlink_handle_t *mesh, connection_t *c) {
111 return send_request(mesh, c, NULL, "%d", PONG);
114 bool pong_h(meshlink_handle_t *mesh, connection_t *c, const char *request) {
121 c->status.pinged = false;
123 /* Successful connection, reset timeout if this is an outgoing connection. */
126 reset_outgoing(c->outgoing);
132 /* Sending and receiving packets via TCP */
134 bool tcppacket_h(meshlink_handle_t *mesh, connection_t *c, const char *request) {
140 if(sscanf(request, "%*d %hd", &len) != 1) {
141 logger(mesh, MESHLINK_ERROR, "Got bad %s from %s", "PACKET", c->name);
145 // This should never happen with MeshLink.
149 bool send_raw_packet(meshlink_handle_t *mesh, connection_t *c, const vpn_packet_t *packet) {
150 size_t hdrsize = sizeof(meshlink_packethdr_t);
151 assert(packet->len >= hdrsize);
152 return send_request(mesh, c, NULL, "%d", PACKET) && send_meta(mesh, c, (const char *)packet->data + hdrsize, packet->len - hdrsize);
155 bool raw_packet_h(meshlink_handle_t *mesh, connection_t *c, const char *request) {
158 c->status.raw_packet = true;