git.meshlink.io Git - meshlink/blob - src/devtools.c

   1 /*
   2     devtools.c -- Debugging and quality control functions.
   3     Copyright (C) 2014, 2017 Guus Sliepen <guus@meshlink.io>
   4
   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.
   9
  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.
  14
  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.
  18 */
  19
  20 #include "system.h"
  21 #include <assert.h>
  22
  23 #include "logger.h"
  24 #include "meshlink_internal.h"
  25 #include "node.h"
  26 #include "submesh.h"
  27 #include "splay_tree.h"
  28 #include "netutl.h"
  29 #include "xalloc.h"
  30
  31 #include "devtools.h"
  32
  33 static void nop_probe(void) {
  34         return;
  35 }
  36
  37 static void keyrotate_nop_probe(int stage) {
  38         (void)stage;
  39         return;
  40 }
  41
  42 static void inviter_commits_first_nop_probe(bool stage) {
  43         (void)stage;
  44         return;
  45 }
  46
  47 static void sptps_renewal_nop_probe(meshlink_node_t *node) {
  48         (void)node;
  49         return;
  50 }
  51
  52 void (*devtool_trybind_probe)(void) = nop_probe;
  53 void (*devtool_keyrotate_probe)(int stage) = keyrotate_nop_probe;
  54 void (*devtool_set_inviter_commits_first)(bool inviter_commited_first) = inviter_commits_first_nop_probe;
  55 void (*devtool_adns_resolve_probe)(void) = nop_probe;
  56 void (*devtool_sptps_renewal_probe)(meshlink_node_t *node) = sptps_renewal_nop_probe;
  57
  58 /* Return an array of edges in the current network graph.
  59  * Data captures the current state and will not be updated.
  60  * Caller must deallocate data when done.
  61  */
  62 devtool_edge_t *devtool_get_all_edges(meshlink_handle_t *mesh, devtool_edge_t *edges, size_t *nmemb) {
  63         if(!mesh || !nmemb || (*nmemb && !edges)) {
  64                 meshlink_errno = MESHLINK_EINVAL;
  65                 return NULL;
  66         }
  67
  68         if(pthread_mutex_lock(&mesh->mutex) != 0) {
  69                 abort();
  70         }
  71
  72         devtool_edge_t *result = NULL;
  73         unsigned int result_size = 0;
  74
  75         result_size = mesh->edges->count / 2;
  76
  77         // if result is smaller than edges, we have to dealloc all the excess devtool_edge_t
  78         if((size_t)result_size > *nmemb) {
  79                 result = xrealloc(edges, result_size * sizeof(*result));
  80         } else {
  81                 result = edges;
  82         }
  83
  84         if(result) {
  85                 devtool_edge_t *p = result;
  86                 unsigned int n = 0;
  87
  88                 for splay_each(edge_t, e, mesh->edges) {
  89                         // skip edges that do not represent a two-directional connection
  90                         if(!e->reverse || e->reverse->to != e->from) {
  91                                 continue;
  92                         }
  93
  94                         // don't count edges twice
  95                         if(e->to < e->from) {
  96                                 continue;
  97                         }
  98
  99                         assert(n < result_size);
 100
 101                         p->from = (meshlink_node_t *)e->from;
 102                         p->to = (meshlink_node_t *)e->to;
 103                         p->address = e->address.storage;
 104                         p->weight = e->weight;
 105
 106                         n++;
 107                         p++;
 108                 }
 109
 110                 // shrink result to the actual amount of memory used
 111                 result = xrealloc(result, n * sizeof(*result));
 112                 *nmemb = n;
 113         } else {
 114                 *nmemb = 0;
 115                 meshlink_errno = MESHLINK_ENOMEM;
 116         }
 117
 118         pthread_mutex_unlock(&mesh->mutex);
 119
 120         return result;
 121 }
 122
 123 static bool fstrwrite(const char *str, FILE *stream) {
 124         assert(stream);
 125
 126         size_t len = strlen(str);
 127
 128         if(fwrite((void *)str, 1, len, stream) != len) {
 129                 return false;
 130         }
 131
 132         return true;
 133 }
 134
 135 bool devtool_export_json_all_edges_state(meshlink_handle_t *mesh, FILE *stream) {
 136         assert(stream);
 137
 138         bool result = true;
 139
 140         if(pthread_mutex_lock(&mesh->mutex) != 0) {
 141                 abort();
 142         }
 143
 144         // export edges and nodes
 145         size_t node_count = 0;
 146         size_t edge_count = 0;
 147
 148         meshlink_node_t **nodes = meshlink_get_all_nodes(mesh, NULL, &node_count);
 149         devtool_edge_t *edges = devtool_get_all_edges(mesh, NULL, &edge_count);
 150
 151         if((!nodes && node_count != 0) || (!edges && edge_count != 0)) {
 152                 goto fail;
 153         }
 154
 155         // export begin
 156         if(!fstrwrite("{\n", stream)) {
 157                 goto fail;
 158         }
 159
 160         // export nodes
 161         if(!fstrwrite("\t\"nodes\": {\n", stream)) {
 162                 goto fail;
 163         }
 164
 165         char buf[16];
 166
 167         for(size_t i = 0; i < node_count; ++i) {
 168                 if(!fstrwrite("\t\t\"", stream) || !fstrwrite(((node_t *)nodes[i])->name, stream) || !fstrwrite("\": {\n", stream)) {
 169                         goto fail;
 170                 }
 171
 172                 if(!fstrwrite("\t\t\t\"name\": \"", stream) || !fstrwrite(((node_t *)nodes[i])->name, stream) || !fstrwrite("\",\n", stream)) {
 173                         goto fail;
 174                 }
 175
 176                 snprintf(buf, sizeof(buf), "%d", ((node_t *)nodes[i])->devclass);
 177
 178                 if(!fstrwrite("\t\t\t\"devclass\": ", stream) || !fstrwrite(buf, stream) || !fstrwrite("\n", stream)) {
 179                         goto fail;
 180                 }
 181
 182                 if(!fstrwrite((i + 1) != node_count ? "\t\t},\n" : "\t\t}\n", stream)) {
 183                         goto fail;
 184                 }
 185         }
 186
 187         if(!fstrwrite("\t},\n", stream)) {
 188                 goto fail;
 189         }
 190
 191         // export edges
 192
 193         if(!fstrwrite("\t\"edges\": {\n", stream)) {
 194                 goto fail;
 195         }
 196
 197         for(size_t i = 0; i < edge_count; ++i) {
 198                 if(!fstrwrite("\t\t\"", stream) || !fstrwrite(edges[i].from->name, stream) || !fstrwrite("_to_", stream) || !fstrwrite(edges[i].to->name, stream) || !fstrwrite("\": {\n", stream)) {
 199                         goto fail;
 200                 }
 201
 202                 if(!fstrwrite("\t\t\t\"from\": \"", stream) || !fstrwrite(edges[i].from->name, stream) || !fstrwrite("\",\n", stream)) {
 203                         goto fail;
 204                 }
 205
 206                 if(!fstrwrite("\t\t\t\"to\": \"", stream) || !fstrwrite(edges[i].to->name, stream) || !fstrwrite("\",\n", stream)) {
 207                         goto fail;
 208                 }
 209
 210                 char *host = NULL, *port = NULL, *address = NULL;
 211                 sockaddr2str((const sockaddr_t *)&edges[i].address, &host, &port);
 212
 213                 if(host && port) {
 214                         xasprintf(&address, "{ \"host\": \"%s\", \"port\": %s }", host, port);
 215                 }
 216
 217                 free(host);
 218                 free(port);
 219
 220                 if(!fstrwrite("\t\t\t\"address\": ", stream) || !fstrwrite(address ? address : "null", stream) || !fstrwrite(",\n", stream)) {
 221                         free(address);
 222                         goto fail;
 223                 }
 224
 225                 free(address);
 226
 227                 snprintf(buf, sizeof(buf), "%d", edges[i].weight);
 228
 229                 if(!fstrwrite("\t\t\t\"weight\": ", stream) || !fstrwrite(buf, stream) || !fstrwrite("\n", stream)) {
 230                         goto fail;
 231                 }
 232
 233                 if(!fstrwrite((i + 1) != edge_count ? "\t\t},\n" : "\t\t}\n", stream)) {
 234                         goto fail;
 235                 }
 236         }
 237
 238         if(!fstrwrite("\t}\n", stream)) {
 239                 goto fail;
 240         }
 241
 242         // DONE!
 243
 244         if(!fstrwrite("}", stream)) {
 245                 goto fail;
 246         }
 247
 248         goto done;
 249
 250 fail:
 251         result = false;
 252
 253 done:
 254         free(nodes);
 255         free(edges);
 256
 257         pthread_mutex_unlock(&mesh->mutex);
 258
 259         return result;
 260 }
 261
 262 void devtool_get_node_status(meshlink_handle_t *mesh, meshlink_node_t *node, devtool_node_status_t *status) {
 263         if(!mesh || !node || !status) {
 264                 meshlink_errno = MESHLINK_EINVAL;
 265                 return;
 266         }
 267
 268         node_t *internal = (node_t *)node;
 269
 270         if(pthread_mutex_lock(&mesh->mutex) != 0) {
 271                 abort();
 272         }
 273
 274         memcpy(&status->status, &internal->status, sizeof status->status);
 275         memcpy(&status->address, &internal->address, sizeof status->address);
 276         status->mtu = internal->mtu;
 277         status->minmtu = internal->minmtu;
 278         status->maxmtu = internal->maxmtu;
 279         status->mtuprobes = internal->mtuprobes;
 280         status->in_packets = internal->in_packets;
 281         status->in_bytes = internal->in_bytes;
 282         status->out_packets = internal->out_packets;
 283         status->out_bytes = internal->out_bytes;
 284
 285         // Derive UDP connection status
 286         if(internal == mesh->self) {
 287                 status->udp_status = DEVTOOL_UDP_WORKING;
 288         } else if(!internal->status.reachable) {
 289                 status->udp_status = DEVTOOL_UDP_IMPOSSIBLE;
 290         } else if(!internal->status.validkey) {
 291                 status->udp_status = DEVTOOL_UDP_UNKNOWN;
 292         } else if(internal->status.udp_confirmed) {
 293                 status->udp_status = DEVTOOL_UDP_WORKING;
 294         } else if(internal->mtuprobes > 30) {
 295                 status->udp_status = DEVTOOL_UDP_FAILED;
 296         } else if(internal->mtuprobes > 0) {
 297                 status->udp_status = DEVTOOL_UDP_TRYING;
 298         } else {
 299                 status->udp_status = DEVTOOL_UDP_UNKNOWN;
 300         }
 301
 302         pthread_mutex_unlock(&mesh->mutex);
 303 }
 304
 305 meshlink_submesh_t **devtool_get_all_submeshes(meshlink_handle_t *mesh, meshlink_submesh_t **submeshes, size_t *nmemb) {
 306         if(!mesh || !nmemb || (*nmemb && !submeshes)) {
 307                 meshlink_errno = MESHLINK_EINVAL;
 308                 return NULL;
 309         }
 310
 311         meshlink_submesh_t **result;
 312
 313         //lock mesh->nodes
 314         if(pthread_mutex_lock(&mesh->mutex) != 0) {
 315                 abort();
 316         }
 317
 318         *nmemb = mesh->submeshes->count;
 319         result = realloc(submeshes, *nmemb * sizeof(*submeshes));
 320
 321         if(result) {
 322                 meshlink_submesh_t **p = result;
 323
 324                 for list_each(submesh_t, s, mesh->submeshes) {
 325                         *p++ = (meshlink_submesh_t *)s;
 326                 }
 327         } else {
 328                 *nmemb = 0;
 329                 free(submeshes);
 330                 meshlink_errno = MESHLINK_ENOMEM;
 331         }
 332
 333         pthread_mutex_unlock(&mesh->mutex);
 334
 335         return result;
 336 }
 337
 338 meshlink_handle_t *devtool_open_in_netns(const char *confbase, const char *name, const char *appname, dev_class_t devclass, int netns) {
 339         meshlink_open_params_t *params = meshlink_open_params_init(confbase, name, appname, devclass);
 340         params->netns = dup(netns);
 341         meshlink_handle_t *handle;
 342
 343         if(params->netns == -1) {
 344                 handle = NULL;
 345                 meshlink_errno = MESHLINK_EINVAL;
 346         } else {
 347                 handle = meshlink_open_ex(params);
 348         }
 349
 350         meshlink_open_params_free(params);
 351
 352         return handle;
 353 }
 354
 355 void devtool_force_sptps_renewal(meshlink_handle_t *mesh, meshlink_node_t *node) {
 356         if(!mesh || !node) {
 357                 meshlink_errno = MESHLINK_EINVAL;
 358                 return;
 359         }
 360
 361         node_t *n = (node_t *)node;
 362         connection_t *c = n->connection;
 363
 364         n->last_req_key = -3600;
 365
 366         if(c) {
 367                 c->last_key_renewal = -3600;
 368         }
 369 }