tinc-vpn.org Git - tinc/blob - src/info.c

   1 /*
   2     info.c -- Show information about a node, subnet or address
   3     Copyright (C) 2012-2017 Guus Sliepen <guus@tinc-vpn.org>
   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
  22 #include "control_common.h"
  23 #include "list.h"
  24 #include "subnet.h"
  25 #include "tincctl.h"
  26 #include "info.h"
  27 #include "utils.h"
  28 #include "xalloc.h"
  29
  30 void logger(int level, int priority, const char *format, ...) {
  31         va_list ap;
  32         va_start(ap, format);
  33         vfprintf(stderr, format, ap);
  34         va_end(ap);
  35         fputc('\n', stderr);
  36 }
  37
  38 char *strip_weight(char *netstr) {
  39         int len = strlen(netstr);
  40
  41         if(len >= 3 && !strcmp(netstr + len - 3, "#10")) {
  42                 netstr[len - 3] = 0;
  43         }
  44
  45         return netstr;
  46 }
  47
  48 static int info_node(int fd, const char *item) {
  49         // Check the list of nodes
  50         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_NODES, item);
  51
  52         bool found = false;
  53         char line[4096];
  54
  55         char node[4096];
  56         char id[4096];
  57         char from[4096];
  58         char to[4096];
  59         char subnet[4096];
  60         char host[4096];
  61         char port[4096];
  62         char via[4096];
  63         char nexthop[4096];
  64         int code, req, cipher, digest, maclength, compression, distance;
  65         short int pmtu, minmtu, maxmtu;
  66         unsigned int options;
  67         union {
  68                 node_status_t bits;
  69                 uint32_t raw;
  70         } status_union;
  71         node_status_t status;
  72         long int last_state_change;
  73
  74         while(recvline(fd, line, sizeof(line))) {
  75                 int n = sscanf(line, "%d %d %4095s %4095s %4095s port %4095s %d %d %d %d %x %"PRIx32" %4095s %4095s %d %hd %hd %hd %ld", &code, &req, node, id, host, port, &cipher, &digest, &maclength, &compression, &options, &status_union.raw, nexthop, via, &distance, &pmtu, &minmtu, &maxmtu, &last_state_change);
  76
  77                 if(n == 2) {
  78                         break;
  79                 }
  80
  81                 if(n != 19) {
  82                         fprintf(stderr, "Unable to parse node dump from tincd.\n");
  83                         return 1;
  84                 }
  85
  86                 if(!strcmp(node, item)) {
  87                         found = true;
  88                         break;
  89                 }
  90         }
  91
  92         if(!found) {
  93                 fprintf(stderr, "Unknown node %s.\n", item);
  94                 return 1;
  95         }
  96
  97         while(recvline(fd, line, sizeof(line))) {
  98                 if(sscanf(line, "%d %d %4095s", &code, &req, node) == 2) {
  99                         break;
 100                 }
 101         }
 102
 103         printf("Node:         %s\n", item);
 104         printf("Node ID:      %s\n", id);
 105         printf("Address:      %s port %s\n", host, port);
 106
 107         char timestr[32] = "never";
 108         time_t lsc_time = last_state_change;
 109
 110         if(last_state_change) {
 111                 strftime(timestr, sizeof(timestr), "%Y-%m-%d %H:%M:%S", localtime(&lsc_time));
 112         }
 113
 114         status = status_union.bits;
 115
 116         if(status.reachable) {
 117                 printf("Online since: %s\n", timestr);
 118         } else {
 119                 printf("Last seen:    %s\n", timestr);
 120         }
 121
 122         printf("Status:      ");
 123
 124         if(status.validkey) {
 125                 printf(" validkey");
 126         }
 127
 128         if(status.visited) {
 129                 printf(" visited");
 130         }
 131
 132         if(status.reachable) {
 133                 printf(" reachable");
 134         }
 135
 136         if(status.indirect) {
 137                 printf(" indirect");
 138         }
 139
 140         if(status.sptps) {
 141                 printf(" sptps");
 142         }
 143
 144         if(status.udp_confirmed) {
 145                 printf(" udp_confirmed");
 146         }
 147
 148         printf("\n");
 149
 150         printf("Options:     ");
 151
 152         if(options & OPTION_INDIRECT) {
 153                 printf(" indirect");
 154         }
 155
 156         if(options & OPTION_TCPONLY) {
 157                 printf(" tcponly");
 158         }
 159
 160         if(options & OPTION_PMTU_DISCOVERY) {
 161                 printf(" pmtu_discovery");
 162         }
 163
 164         if(options & OPTION_CLAMP_MSS) {
 165                 printf(" clamp_mss");
 166         }
 167
 168         printf("\n");
 169         printf("Protocol:     %d.%d\n", PROT_MAJOR, OPTION_VERSION(options));
 170         printf("Reachability: ");
 171
 172         if(!strcmp(host, "MYSELF")) {
 173                 printf("can reach itself\n");
 174         } else if(!status.reachable) {
 175                 printf("unreachable\n");
 176         } else if(strcmp(via, item)) {
 177                 printf("indirectly via %s\n", via);
 178         } else if(!status.validkey) {
 179                 printf("unknown\n");
 180         } else if(minmtu > 0) {
 181                 printf("directly with UDP\nPMTU:         %d\n", pmtu);
 182         } else if(!strcmp(nexthop, item)) {
 183                 printf("directly with TCP\n");
 184         } else {
 185                 printf("none, forwarded via %s\n", nexthop);
 186         }
 187
 188         // List edges
 189         printf("Edges:       ");
 190         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_EDGES, item);
 191
 192         while(recvline(fd, line, sizeof(line))) {
 193                 int n = sscanf(line, "%d %d %4095s %4095s", &code, &req, from, to);
 194
 195                 if(n == 2) {
 196                         break;
 197                 }
 198
 199                 if(n != 4) {
 200                         fprintf(stderr, "Unable to parse edge dump from tincd.\n%s\n", line);
 201                         return 1;
 202                 }
 203
 204                 if(!strcmp(from, item)) {
 205                         printf(" %s", to);
 206                 }
 207         }
 208
 209         printf("\n");
 210
 211         // List subnets
 212         printf("Subnets:     ");
 213         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_SUBNETS, item);
 214
 215         while(recvline(fd, line, sizeof(line))) {
 216                 int n = sscanf(line, "%d %d %4095s %4095s", &code, &req, subnet, from);
 217
 218                 if(n == 2) {
 219                         break;
 220                 }
 221
 222                 if(n != 4) {
 223                         fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
 224                         return 1;
 225                 }
 226
 227                 if(!strcmp(from, item)) {
 228                         printf(" %s", strip_weight(subnet));
 229                 }
 230         }
 231
 232         printf("\n");
 233
 234         return 0;
 235 }
 236
 237 static int info_subnet(int fd, const char *item) {
 238         subnet_t subnet, find;
 239
 240         if(!str2net(&find, item)) {
 241                 fprintf(stderr, "Could not parse subnet or address '%s'.\n", item);
 242                 return 1;
 243         }
 244
 245         bool address = !strchr(item, '/');
 246         bool weight = strchr(item, '#');
 247         bool found = false;
 248
 249         char line[4096];
 250         char netstr[4096];
 251         char owner[4096];
 252
 253         int code, req;
 254
 255         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_SUBNETS, item);
 256
 257         while(recvline(fd, line, sizeof(line))) {
 258                 int n = sscanf(line, "%d %d %4095s %4095s", &code, &req, netstr, owner);
 259
 260                 if(n == 2) {
 261                         break;
 262                 }
 263
 264                 if(n != 4 || !str2net(&subnet, netstr)) {
 265                         fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
 266                         return 1;
 267                 }
 268
 269                 if(find.type != subnet.type) {
 270                         continue;
 271                 }
 272
 273                 if(weight) {
 274                         if(find.weight != subnet.weight) {
 275                                 continue;
 276                         }
 277                 }
 278
 279                 if(find.type == SUBNET_IPV4) {
 280                         if(address) {
 281                                 if(maskcmp(&find.net.ipv4.address, &subnet.net.ipv4.address, subnet.net.ipv4.prefixlength)) {
 282                                         continue;
 283                                 }
 284                         } else {
 285                                 if(find.net.ipv4.prefixlength != subnet.net.ipv4.prefixlength) {
 286                                         continue;
 287                                 }
 288
 289                                 if(memcmp(&find.net.ipv4.address, &subnet.net.ipv4.address, sizeof(subnet.net.ipv4))) {
 290                                         continue;
 291                                 }
 292                         }
 293                 } else if(find.type == SUBNET_IPV6) {
 294                         if(address) {
 295                                 if(maskcmp(&find.net.ipv6.address, &subnet.net.ipv6.address, subnet.net.ipv6.prefixlength)) {
 296                                         continue;
 297                                 }
 298                         } else {
 299                                 if(find.net.ipv6.prefixlength != subnet.net.ipv6.prefixlength) {
 300                                         continue;
 301                                 }
 302
 303                                 if(memcmp(&find.net.ipv6.address, &subnet.net.ipv6.address, sizeof(subnet.net.ipv6))) {
 304                                         continue;
 305                                 }
 306                         }
 307                 }
 308
 309                 if(find.type == SUBNET_MAC) {
 310                         if(memcmp(&find.net.mac.address, &subnet.net.mac.address, sizeof(subnet.net.mac))) {
 311                                 continue;
 312                         }
 313                 }
 314
 315                 found = true;
 316                 printf("Subnet: %s\n", strip_weight(netstr));
 317                 printf("Owner:  %s\n", owner);
 318         }
 319
 320         if(!found) {
 321                 if(address) {
 322                         fprintf(stderr, "Unknown address %s.\n", item);
 323                 } else {
 324                         fprintf(stderr, "Unknown subnet %s.\n", item);
 325                 }
 326
 327                 return 1;
 328         }
 329
 330         return 0;
 331 }
 332
 333 int info(int fd, const char *item) {
 334         if(check_id(item)) {
 335                 return info_node(fd, item);
 336         }
 337
 338         if(strchr(item, '.') || strchr(item, ':')) {
 339                 return info_subnet(fd, item);
 340         }
 341
 342         fprintf(stderr, "Argument is not a node name, subnet or address.\n");
 343         return 1;
 344 }