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 static void keyrotate_nop_probe(int stage) {
42 static void inviter_commits_first_nop_probe(bool stage) {
47 void (*devtool_trybind_probe)(void) = nop_probe;
48 void (*devtool_keyrotate_probe)(int stage) = keyrotate_nop_probe;
49 void (*devtool_set_inviter_commits_first)(bool inviter_commited_first) = inviter_commits_first_nop_probe;
50 void (*devtool_adns_resolve_probe)(void) = nop_probe;
52 /* Return an array of edges in the current network graph.
53 * Data captures the current state and will not be updated.
54 * Caller must deallocate data when done.
56 devtool_edge_t *devtool_get_all_edges(meshlink_handle_t *mesh, devtool_edge_t *edges, size_t *nmemb) {
57 if(!mesh || !nmemb || (*nmemb && !edges)) {
58 meshlink_errno = MESHLINK_EINVAL;
62 pthread_mutex_lock(&mesh->mutex);
64 devtool_edge_t *result = NULL;
65 unsigned int result_size = 0;
67 result_size = mesh->edges->count / 2;
69 // if result is smaller than edges, we have to dealloc all the excess devtool_edge_t
70 if((size_t)result_size > *nmemb) {
71 result = xrealloc(edges, result_size * sizeof(*result));
77 devtool_edge_t *p = result;
80 for splay_each(edge_t, e, mesh->edges) {
81 // skip edges that do not represent a two-directional connection
82 if(!e->reverse || e->reverse->to != e->from) {
86 // don't count edges twice
91 assert(n < result_size);
93 p->from = (meshlink_node_t *)e->from;
94 p->to = (meshlink_node_t *)e->to;
95 p->address = e->address.storage;
96 p->weight = e->weight;
102 // shrink result to the actual amount of memory used
103 result = xrealloc(result, n * sizeof(*result));
107 meshlink_errno = MESHLINK_ENOMEM;
110 pthread_mutex_unlock(&mesh->mutex);
115 static bool fstrwrite(const char *str, FILE *stream) {
118 size_t len = strlen(str);
120 if(fwrite((void *)str, 1, len, stream) != len) {
127 bool devtool_export_json_all_edges_state(meshlink_handle_t *mesh, FILE *stream) {
132 pthread_mutex_lock(&mesh->mutex);
134 // export edges and nodes
135 size_t node_count = 0;
136 size_t edge_count = 0;
138 meshlink_node_t **nodes = meshlink_get_all_nodes(mesh, NULL, &node_count);
139 devtool_edge_t *edges = devtool_get_all_edges(mesh, NULL, &edge_count);
141 if((!nodes && node_count != 0) || (!edges && edge_count != 0)) {
146 if(!fstrwrite("{\n", stream)) {
151 if(!fstrwrite("\t\"nodes\": {\n", stream)) {
157 for(size_t i = 0; i < node_count; ++i) {
158 if(!fstrwrite("\t\t\"", stream) || !fstrwrite(((node_t *)nodes[i])->name, stream) || !fstrwrite("\": {\n", stream)) {
162 if(!fstrwrite("\t\t\t\"name\": \"", stream) || !fstrwrite(((node_t *)nodes[i])->name, stream) || !fstrwrite("\",\n", stream)) {
166 snprintf(buf, sizeof(buf), "%d", ((node_t *)nodes[i])->devclass);
168 if(!fstrwrite("\t\t\t\"devclass\": ", stream) || !fstrwrite(buf, stream) || !fstrwrite("\n", stream)) {
172 if(!fstrwrite((i + 1) != node_count ? "\t\t},\n" : "\t\t}\n", stream)) {
177 if(!fstrwrite("\t},\n", stream)) {
183 if(!fstrwrite("\t\"edges\": {\n", stream)) {
187 for(size_t i = 0; i < edge_count; ++i) {
188 if(!fstrwrite("\t\t\"", stream) || !fstrwrite(edges[i].from->name, stream) || !fstrwrite("_to_", stream) || !fstrwrite(edges[i].to->name, stream) || !fstrwrite("\": {\n", stream)) {
192 if(!fstrwrite("\t\t\t\"from\": \"", stream) || !fstrwrite(edges[i].from->name, stream) || !fstrwrite("\",\n", stream)) {
196 if(!fstrwrite("\t\t\t\"to\": \"", stream) || !fstrwrite(edges[i].to->name, stream) || !fstrwrite("\",\n", stream)) {
200 char *host = NULL, *port = NULL, *address = NULL;
201 sockaddr2str((const sockaddr_t *)&edges[i].address, &host, &port);
204 xasprintf(&address, "{ \"host\": \"%s\", \"port\": %s }", host, port);
210 if(!fstrwrite("\t\t\t\"address\": ", stream) || !fstrwrite(address ? address : "null", stream) || !fstrwrite(",\n", stream)) {
217 snprintf(buf, sizeof(buf), "%d", edges[i].weight);
219 if(!fstrwrite("\t\t\t\"weight\": ", stream) || !fstrwrite(buf, stream) || !fstrwrite("\n", stream)) {
223 if(!fstrwrite((i + 1) != edge_count ? "\t\t},\n" : "\t\t}\n", stream)) {
228 if(!fstrwrite("\t}\n", stream)) {
234 if(!fstrwrite("}", stream)) {
247 pthread_mutex_unlock(&mesh->mutex);
252 void devtool_get_node_status(meshlink_handle_t *mesh, meshlink_node_t *node, devtool_node_status_t *status) {
253 if(!mesh || !node || !status) {
254 meshlink_errno = MESHLINK_EINVAL;
258 node_t *internal = (node_t *)node;
260 pthread_mutex_lock(&mesh->mutex);
262 memcpy(&status->status, &internal->status, sizeof status->status);
263 memcpy(&status->address, &internal->address, sizeof status->address);
264 status->mtu = internal->mtu;
265 status->minmtu = internal->minmtu;
266 status->maxmtu = internal->maxmtu;
267 status->mtuprobes = internal->mtuprobes;
268 status->in_packets = internal->in_packets;
269 status->in_bytes = internal->in_bytes;
270 status->out_packets = internal->out_packets;
271 status->out_bytes = internal->out_bytes;
273 // Derive UDP connection status
274 if(internal == mesh->self) {
275 status->udp_status = DEVTOOL_UDP_WORKING;
276 } else if(!internal->status.reachable) {
277 status->udp_status = DEVTOOL_UDP_IMPOSSIBLE;
278 } else if(!internal->status.validkey) {
279 status->udp_status = DEVTOOL_UDP_UNKNOWN;
280 } else if(internal->status.udp_confirmed) {
281 status->udp_status = DEVTOOL_UDP_WORKING;
282 } else if(internal->mtuprobes > 30) {
283 status->udp_status = DEVTOOL_UDP_FAILED;
284 } else if(internal->mtuprobes > 0) {
285 status->udp_status = DEVTOOL_UDP_TRYING;
287 status->udp_status = DEVTOOL_UDP_UNKNOWN;
290 pthread_mutex_unlock(&mesh->mutex);
293 meshlink_submesh_t **devtool_get_all_submeshes(meshlink_handle_t *mesh, meshlink_submesh_t **submeshes, size_t *nmemb) {
294 if(!mesh || !nmemb || (*nmemb && !submeshes)) {
295 meshlink_errno = MESHLINK_EINVAL;
299 meshlink_submesh_t **result;
302 pthread_mutex_lock(&mesh->mutex);
304 *nmemb = mesh->submeshes->count;
305 result = realloc(submeshes, *nmemb * sizeof(*submeshes));
308 meshlink_submesh_t **p = result;
310 for list_each(submesh_t, s, mesh->submeshes) {
311 *p++ = (meshlink_submesh_t *)s;
316 meshlink_errno = MESHLINK_ENOMEM;
319 pthread_mutex_unlock(&mesh->mutex);
324 meshlink_handle_t *devtool_open_in_netns(const char *confbase, const char *name, const char *appname, dev_class_t devclass, int netns) {
325 meshlink_open_params_t *params = meshlink_open_params_init(confbase, name, appname, devclass);
326 params->netns = dup(netns);
327 meshlink_handle_t *handle;
329 if(params->netns == -1) {
331 meshlink_errno = MESHLINK_EINVAL;
333 handle = meshlink_open_ex(params);
336 meshlink_open_params_free(params);