2 devtools.c -- Debugging and quality control 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.
24 #include "meshlink_internal.h"
27 #include "splay_tree.h"
33 static void nop_probe(void) {
37 void (*devtool_trybind_probe)(void) = nop_probe;
39 /* Return an array of edges in the current network graph.
40 * Data captures the current state and will not be updated.
41 * Caller must deallocate data when done.
43 devtool_edge_t *devtool_get_all_edges(meshlink_handle_t *mesh, devtool_edge_t *edges, size_t *nmemb) {
44 if(!mesh || !nmemb || (*nmemb && !edges)) {
45 meshlink_errno = MESHLINK_EINVAL;
49 pthread_mutex_lock(&(mesh->mesh_mutex));
51 devtool_edge_t *result = NULL;
52 unsigned int result_size = 0;
54 result_size = mesh->edges->count / 2;
56 // if result is smaller than edges, we have to dealloc all the excess devtool_edge_t
57 if((size_t)result_size > *nmemb) {
58 result = realloc(edges, result_size * sizeof(*result));
64 devtool_edge_t *p = result;
67 for splay_each(edge_t, e, mesh->edges) {
68 // skip edges that do not represent a two-directional connection
69 if((!e->reverse) || (e->reverse->to != e->from)) {
73 // don't count edges twice
78 assert(n < result_size);
80 p->from = (meshlink_node_t *)e->from;
81 p->to = (meshlink_node_t *)e->to;
82 p->address = e->address.storage;
83 p->options = e->options;
84 p->weight = e->weight;
90 // shrink result to the actual amount of memory used
91 result = realloc(result, n * sizeof(*result));
95 meshlink_errno = MESHLINK_ENOMEM;
98 pthread_mutex_unlock(&(mesh->mesh_mutex));
103 static bool fstrwrite(const char *str, FILE *stream) {
104 size_t len = strlen(str);
106 if(fwrite((void *)str, 1, len, stream) != len) {
113 static const char *__itoa(int value) {
114 static char buffer[sizeof(int) * 8 + 1]; // not thread safe
116 if(snprintf(buffer, sizeof(buffer), "%d", value) == -1) {
123 bool devtool_export_json_all_edges_state(meshlink_handle_t *mesh, FILE *stream) {
126 pthread_mutex_lock(&(mesh->mesh_mutex));
128 // export edges and nodes
129 size_t node_count = 0;
130 size_t edge_count = 0;
132 meshlink_node_t **nodes = meshlink_get_all_nodes(mesh, NULL, &node_count);
133 devtool_edge_t *edges = devtool_get_all_edges(mesh, NULL, &edge_count);
135 if((!nodes && node_count != 0) || (!edges && edge_count != 0)) {
140 if(!fstrwrite("{\n", stream)) {
145 if(!fstrwrite("\t\"nodes\": {\n", stream)) {
149 for(size_t i = 0; i < node_count; ++i) {
150 if(!fstrwrite("\t\t\"", stream) || !fstrwrite(((node_t *)nodes[i])->name, stream) || !fstrwrite("\": {\n", stream)) {
154 if(!fstrwrite("\t\t\t\"name\": \"", stream) || !fstrwrite(((node_t *)nodes[i])->name, stream) || !fstrwrite("\",\n", stream)) {
158 if(!fstrwrite("\t\t\t\"options\": ", stream) || !fstrwrite(__itoa(((node_t *)nodes[i])->options), stream) || !fstrwrite(",\n", stream)) {
162 if(!fstrwrite("\t\t\t\"devclass\": ", stream) || !fstrwrite(__itoa(((node_t *)nodes[i])->devclass), stream) || !fstrwrite("\n", stream)) {
166 if(!fstrwrite((i + 1) != node_count ? "\t\t},\n" : "\t\t}\n", stream)) {
171 if(!fstrwrite("\t},\n", stream)) {
177 if(!fstrwrite("\t\"edges\": {\n", stream)) {
181 for(size_t i = 0; i < edge_count; ++i) {
182 if(!fstrwrite("\t\t\"", stream) || !fstrwrite(edges[i].from->name, stream) || !fstrwrite("_to_", stream) || !fstrwrite(edges[i].to->name, stream) || !fstrwrite("\": {\n", stream)) {
186 if(!fstrwrite("\t\t\t\"from\": \"", stream) || !fstrwrite(edges[i].from->name, stream) || !fstrwrite("\",\n", stream)) {
190 if(!fstrwrite("\t\t\t\"to\": \"", stream) || !fstrwrite(edges[i].to->name, stream) || !fstrwrite("\",\n", stream)) {
194 char *host = NULL, *port = NULL, *address = NULL;
195 sockaddr2str((const sockaddr_t *)&edges[i].address, &host, &port);
198 xasprintf(&address, "{ \"host\": \"%s\", \"port\": %s }", host, port);
204 if(!fstrwrite("\t\t\t\"address\": ", stream) || !fstrwrite(address ? address : "null", stream) || !fstrwrite(",\n", stream)) {
211 if(!fstrwrite("\t\t\t\"options\": ", stream) || !fstrwrite(__itoa(edges[i].options), stream) || !fstrwrite(",\n", stream)) {
215 if(!fstrwrite("\t\t\t\"weight\": ", stream) || !fstrwrite(__itoa(edges[i].weight), stream) || !fstrwrite("\n", stream)) {
219 if(!fstrwrite((i + 1) != edge_count ? "\t\t},\n" : "\t\t}\n", stream)) {
224 if(!fstrwrite("\t}\n", stream)) {
230 if(!fstrwrite("}", stream)) {
243 pthread_mutex_unlock(&(mesh->mesh_mutex));
248 void devtool_get_node_status(meshlink_handle_t *mesh, meshlink_node_t *node, devtool_node_status_t *status) {
249 if(!mesh || !node || !status) {
250 meshlink_errno = MESHLINK_EINVAL;
254 node_t *internal = (node_t *)node;
256 pthread_mutex_lock(&mesh->mesh_mutex);
258 status->options = internal->options;
259 memcpy(&status->status, &internal->status, sizeof status->status);
260 memcpy(&status->address, &internal->address, sizeof status->address);
261 status->mtu = internal->mtu;
262 status->minmtu = internal->minmtu;
263 status->maxmtu = internal->maxmtu;
264 status->mtuprobes = internal->mtuprobes;
265 status->in_packets = internal->in_packets;
266 status->in_bytes = internal->in_bytes;
267 status->out_packets = internal->out_packets;
268 status->out_bytes = internal->out_bytes;
270 // Derive UDP connection status
271 if(internal == mesh->self) {
272 status->udp_status = DEVTOOL_UDP_WORKING;
273 } else if(!internal->status.reachable) {
274 status->udp_status = DEVTOOL_UDP_IMPOSSIBLE;
275 } else if(!internal->status.validkey) {
276 status->udp_status = DEVTOOL_UDP_UNKNOWN;
277 } else if(internal->status.udp_confirmed) {
278 status->udp_status = DEVTOOL_UDP_WORKING;
279 } else if(internal->mtuprobes > 30) {
280 status->udp_status = DEVTOOL_UDP_FAILED;
281 } else if(internal->mtuprobes > 0) {
282 status->udp_status = DEVTOOL_UDP_TRYING;
284 status->udp_status = DEVTOOL_UDP_UNKNOWN;
287 pthread_mutex_unlock(&mesh->mesh_mutex);
290 meshlink_submesh_t **devtool_get_all_submeshes(meshlink_handle_t *mesh, meshlink_submesh_t **submeshes, size_t *nmemb) {
291 if(!mesh || !nmemb || (*nmemb && !submeshes)) {
292 meshlink_errno = MESHLINK_EINVAL;
296 meshlink_submesh_t **result;
299 pthread_mutex_lock(&(mesh->mesh_mutex));
301 *nmemb = mesh->submeshes->count;
302 result = realloc(submeshes, *nmemb * sizeof(*submeshes));
305 meshlink_submesh_t **p = result;
307 for list_each(submesh_t, s, mesh->submeshes) {
308 *p++ = (meshlink_submesh_t *)s;
313 meshlink_errno = MESHLINK_ENOMEM;
316 pthread_mutex_unlock(&(mesh->mesh_mutex));
320 meshlink_handle_t *devtool_open_in_netns(const char *confbase, const char *name, const char *appname, dev_class_t devclass, int netns) {
321 meshlink_open_params_t *params = meshlink_open_params_init(confbase, name, appname, devclass);
322 params->netns = dup(netns);
323 meshlink_handle_t *handle;
325 if(params->netns == -1) {
327 meshlink_errno = MESHLINK_EINVAL;
329 handle = meshlink_open_ex(params);
332 meshlink_open_params_free(params);