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         long int udp_ping_rtt;
  74         uint64_t in_packets, in_bytes, out_packets, out_bytes;
  75
  76         while(recvline(fd, line, sizeof(line))) {
  77                 int n = sscanf(line, "%d %d %4095s %4095s %4095s port %4095s %d %d %d %d %x %"PRIx32" %4095s %4095s %d %hd %hd %hd %ld %ld %lu %lu %lu %lu", &code, &req, node, id, host, port, &cipher, &digest, &maclength, &compression, &options, &status_union.raw, nexthop, via, &distance, &pmtu, &minmtu, &maxmtu, &last_state_change, &udp_ping_rtt, &in_packets, &in_bytes, &out_packets, &out_bytes);
  78
  79                 if(n == 2) {
  80                         break;
  81                 }
  82
  83                 if(n != 24) {
  84                         fprintf(stderr, "Unable to parse node dump from tincd.\n");
  85                         return 1;
  86                 }
  87
  88                 if(!strcmp(node, item)) {
  89                         found = true;
  90                         break;
  91                 }
  92         }
  93
  94         if(!found) {
  95                 fprintf(stderr, "Unknown node %s.\n", item);
  96                 return 1;
  97         }
  98
  99         while(recvline(fd, line, sizeof(line))) {
 100                 if(sscanf(line, "%d %d %4095s", &code, &req, node) == 2) {
 101                         break;
 102                 }
 103         }
 104
 105         printf("Node:         %s\n", item);
 106         printf("Node ID:      %s\n", id);
 107         printf("Address:      %s port %s\n", host, port);
 108
 109         char timestr[32] = "never";
 110         time_t lsc_time = last_state_change;
 111
 112         if(last_state_change) {
 113                 strftime(timestr, sizeof(timestr), "%Y-%m-%d %H:%M:%S", localtime(&lsc_time));
 114         }
 115
 116         status = status_union.bits;
 117
 118         if(status.reachable) {
 119                 printf("Online since: %s\n", timestr);
 120         } else {
 121                 printf("Last seen:    %s\n", timestr);
 122         }
 123
 124         printf("Status:      ");
 125
 126         if(status.validkey) {
 127                 printf(" validkey");
 128         }
 129
 130         if(status.visited) {
 131                 printf(" visited");
 132         }
 133
 134         if(status.reachable) {
 135                 printf(" reachable");
 136         }
 137
 138         if(status.indirect) {
 139                 printf(" indirect");
 140         }
 141
 142         if(status.sptps) {
 143                 printf(" sptps");
 144         }
 145
 146         if(status.udp_confirmed) {
 147                 printf(" udp_confirmed");
 148                 if(udp_ping_rtt != -1)
 149                         printf(" (rtt %ld.%03ld)", udp_ping_rtt/1000, udp_ping_rtt%1000);
 150         }
 151
 152         printf("\n");
 153
 154         printf("Options:     ");
 155
 156         if(options & OPTION_INDIRECT) {
 157                 printf(" indirect");
 158         }
 159
 160         if(options & OPTION_TCPONLY) {
 161                 printf(" tcponly");
 162         }
 163
 164         if(options & OPTION_PMTU_DISCOVERY) {
 165                 printf(" pmtu_discovery");
 166         }
 167
 168         if(options & OPTION_CLAMP_MSS) {
 169                 printf(" clamp_mss");
 170         }
 171
 172         printf("\n");
 173         printf("Protocol:     %d.%d\n", PROT_MAJOR, OPTION_VERSION(options));
 174         printf("Reachability: ");
 175
 176         if(!strcmp(host, "MYSELF")) {
 177                 printf("can reach itself\n");
 178         } else if(!status.reachable) {
 179                 printf("unreachable\n");
 180         } else if(strcmp(via, item)) {
 181                 printf("indirectly via %s\n", via);
 182         } else if(!status.validkey) {
 183                 printf("unknown\n");
 184         } else if(minmtu > 0) {
 185                 printf("directly with UDP\nPMTU:         %d\n", pmtu);
 186         } else if(!strcmp(nexthop, item)) {
 187                 printf("directly with TCP\n");
 188         } else {
 189                 printf("none, forwarded via %s\n", nexthop);
 190         }
 191
 192         printf("RX:          %lu packets  %lu bytes\n", in_packets, in_bytes);
 193         printf("TX:          %lu packets  %lu bytes\n", out_packets, out_bytes);
 194
 195         // List edges
 196         printf("Edges:       ");
 197         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_EDGES, item);
 198
 199         while(recvline(fd, line, sizeof(line))) {
 200                 int n = sscanf(line, "%d %d %4095s %4095s", &code, &req, from, to);
 201
 202                 if(n == 2) {
 203                         break;
 204                 }
 205
 206                 if(n != 4) {
 207                         fprintf(stderr, "Unable to parse edge dump from tincd.\n%s\n", line);
 208                         return 1;
 209                 }
 210
 211                 if(!strcmp(from, item)) {
 212                         printf(" %s", to);
 213                 }
 214         }
 215
 216         printf("\n");
 217
 218         // List subnets
 219         printf("Subnets:     ");
 220         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_SUBNETS, item);
 221
 222         while(recvline(fd, line, sizeof(line))) {
 223                 int n = sscanf(line, "%d %d %4095s %4095s", &code, &req, subnet, from);
 224
 225                 if(n == 2) {
 226                         break;
 227                 }
 228
 229                 if(n != 4) {
 230                         fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
 231                         return 1;
 232                 }
 233
 234                 if(!strcmp(from, item)) {
 235                         printf(" %s", strip_weight(subnet));
 236                 }
 237         }
 238
 239         printf("\n");
 240
 241         return 0;
 242 }
 243
 244 static int info_subnet(int fd, const char *item) {
 245         subnet_t subnet, find;
 246
 247         if(!str2net(&find, item)) {
 248                 fprintf(stderr, "Could not parse subnet or address '%s'.\n", item);
 249                 return 1;
 250         }
 251
 252         bool address = !strchr(item, '/');
 253         bool weight = strchr(item, '#');
 254         bool found = false;
 255
 256         char line[4096];
 257         char netstr[4096];
 258         char owner[4096];
 259
 260         int code, req;
 261
 262         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_SUBNETS, item);
 263
 264         while(recvline(fd, line, sizeof(line))) {
 265                 int n = sscanf(line, "%d %d %4095s %4095s", &code, &req, netstr, owner);
 266
 267                 if(n == 2) {
 268                         break;
 269                 }
 270
 271                 if(n != 4 || !str2net(&subnet, netstr)) {
 272                         fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
 273                         return 1;
 274                 }
 275
 276                 if(find.type != subnet.type) {
 277                         continue;
 278                 }
 279
 280                 if(weight) {
 281                         if(find.weight != subnet.weight) {
 282                                 continue;
 283                         }
 284                 }
 285
 286                 if(find.type == SUBNET_IPV4) {
 287                         if(address) {
 288                                 if(maskcmp(&find.net.ipv4.address, &subnet.net.ipv4.address, subnet.net.ipv4.prefixlength)) {
 289                                         continue;
 290                                 }
 291                         } else {
 292                                 if(find.net.ipv4.prefixlength != subnet.net.ipv4.prefixlength) {
 293                                         continue;
 294                                 }
 295
 296                                 if(memcmp(&find.net.ipv4.address, &subnet.net.ipv4.address, sizeof(subnet.net.ipv4))) {
 297                                         continue;
 298                                 }
 299                         }
 300                 } else if(find.type == SUBNET_IPV6) {
 301                         if(address) {
 302                                 if(maskcmp(&find.net.ipv6.address, &subnet.net.ipv6.address, subnet.net.ipv6.prefixlength)) {
 303                                         continue;
 304                                 }
 305                         } else {
 306                                 if(find.net.ipv6.prefixlength != subnet.net.ipv6.prefixlength) {
 307                                         continue;
 308                                 }
 309
 310                                 if(memcmp(&find.net.ipv6.address, &subnet.net.ipv6.address, sizeof(subnet.net.ipv6))) {
 311                                         continue;
 312                                 }
 313                         }
 314                 }
 315
 316                 if(find.type == SUBNET_MAC) {
 317                         if(memcmp(&find.net.mac.address, &subnet.net.mac.address, sizeof(subnet.net.mac))) {
 318                                 continue;
 319                         }
 320                 }
 321
 322                 found = true;
 323                 printf("Subnet: %s\n", strip_weight(netstr));
 324                 printf("Owner:  %s\n", owner);
 325         }
 326
 327         if(!found) {
 328                 if(address) {
 329                         fprintf(stderr, "Unknown address %s.\n", item);
 330                 } else {
 331                         fprintf(stderr, "Unknown subnet %s.\n", item);
 332                 }
 333
 334                 return 1;
 335         }
 336
 337         return 0;
 338 }
 339
 340 int info(int fd, const char *item) {
 341         if(check_id(item)) {
 342                 return info_node(fd, item);
 343         }
 344
 345         if(strchr(item, '.') || strchr(item, ':')) {
 346                 return info_subnet(fd, item);
 347         }
 348
 349         fprintf(stderr, "Argument is not a node name, subnet or address.\n");
 350         return 1;
 351 }