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         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 %d %"PRIu64" %"PRIu64" %"PRIu64" %"PRIu64, &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
 149                 if(udp_ping_rtt != -1) {
 150                         printf(" (rtt %d.%03d)", udp_ping_rtt / 1000, udp_ping_rtt % 1000);
 151                 }
 152         }
 153
 154         printf("\n");
 155
 156         printf("Options:     ");
 157
 158         if(options & OPTION_INDIRECT) {
 159                 printf(" indirect");
 160         }
 161
 162         if(options & OPTION_TCPONLY) {
 163                 printf(" tcponly");
 164         }
 165
 166         if(options & OPTION_PMTU_DISCOVERY) {
 167                 printf(" pmtu_discovery");
 168         }
 169
 170         if(options & OPTION_CLAMP_MSS) {
 171                 printf(" clamp_mss");
 172         }
 173
 174         printf("\n");
 175         printf("Protocol:     %d.%d\n", PROT_MAJOR, OPTION_VERSION(options));
 176         printf("Reachability: ");
 177
 178         if(!strcmp(host, "MYSELF")) {
 179                 printf("can reach itself\n");
 180         } else if(!status.reachable) {
 181                 printf("unreachable\n");
 182         } else if(strcmp(via, item)) {
 183                 printf("indirectly via %s\n", via);
 184         } else if(!status.validkey) {
 185                 printf("unknown\n");
 186         } else if(minmtu > 0) {
 187                 printf("directly with UDP\nPMTU:         %d\n", pmtu);
 188         } else if(!strcmp(nexthop, item)) {
 189                 printf("directly with TCP\n");
 190         } else {
 191                 printf("none, forwarded via %s\n", nexthop);
 192         }
 193
 194         printf("RX:           %"PRIu64" packets  %"PRIu64" bytes\n", in_packets, in_bytes);
 195         printf("TX:           %"PRIu64" packets  %"PRIu64" bytes\n", out_packets, out_bytes);
 196
 197         // List edges
 198         printf("Edges:       ");
 199         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_EDGES, item);
 200
 201         while(recvline(fd, line, sizeof(line))) {
 202                 int n = sscanf(line, "%d %d %4095s %4095s", &code, &req, from, to);
 203
 204                 if(n == 2) {
 205                         break;
 206                 }
 207
 208                 if(n != 4) {
 209                         fprintf(stderr, "Unable to parse edge dump from tincd.\n%s\n", line);
 210                         return 1;
 211                 }
 212
 213                 if(!strcmp(from, item)) {
 214                         printf(" %s", to);
 215                 }
 216         }
 217
 218         printf("\n");
 219
 220         // List subnets
 221         printf("Subnets:     ");
 222         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_SUBNETS, item);
 223
 224         while(recvline(fd, line, sizeof(line))) {
 225                 int n = sscanf(line, "%d %d %4095s %4095s", &code, &req, subnet, from);
 226
 227                 if(n == 2) {
 228                         break;
 229                 }
 230
 231                 if(n != 4) {
 232                         fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
 233                         return 1;
 234                 }
 235
 236                 if(!strcmp(from, item)) {
 237                         printf(" %s", strip_weight(subnet));
 238                 }
 239         }
 240
 241         printf("\n");
 242
 243         return 0;
 244 }
 245
 246 static int info_subnet(int fd, const char *item) {
 247         subnet_t subnet, find;
 248
 249         if(!str2net(&find, item)) {
 250                 fprintf(stderr, "Could not parse subnet or address '%s'.\n", item);
 251                 return 1;
 252         }
 253
 254         bool address = !strchr(item, '/');
 255         bool weight = strchr(item, '#');
 256         bool found = false;
 257
 258         char line[4096];
 259         char netstr[4096];
 260         char owner[4096];
 261
 262         int code, req;
 263
 264         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_SUBNETS, item);
 265
 266         while(recvline(fd, line, sizeof(line))) {
 267                 int n = sscanf(line, "%d %d %4095s %4095s", &code, &req, netstr, owner);
 268
 269                 if(n == 2) {
 270                         break;
 271                 }
 272
 273                 if(n != 4 || !str2net(&subnet, netstr)) {
 274                         fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
 275                         return 1;
 276                 }
 277
 278                 if(find.type != subnet.type) {
 279                         continue;
 280                 }
 281
 282                 if(weight) {
 283                         if(find.weight != subnet.weight) {
 284                                 continue;
 285                         }
 286                 }
 287
 288                 if(find.type == SUBNET_IPV4) {
 289                         if(address) {
 290                                 if(maskcmp(&find.net.ipv4.address, &subnet.net.ipv4.address, subnet.net.ipv4.prefixlength)) {
 291                                         continue;
 292                                 }
 293                         } else {
 294                                 if(find.net.ipv4.prefixlength != subnet.net.ipv4.prefixlength) {
 295                                         continue;
 296                                 }
 297
 298                                 if(memcmp(&find.net.ipv4.address, &subnet.net.ipv4.address, sizeof(subnet.net.ipv4))) {
 299                                         continue;
 300                                 }
 301                         }
 302                 } else if(find.type == SUBNET_IPV6) {
 303                         if(address) {
 304                                 if(maskcmp(&find.net.ipv6.address, &subnet.net.ipv6.address, subnet.net.ipv6.prefixlength)) {
 305                                         continue;
 306                                 }
 307                         } else {
 308                                 if(find.net.ipv6.prefixlength != subnet.net.ipv6.prefixlength) {
 309                                         continue;
 310                                 }
 311
 312                                 if(memcmp(&find.net.ipv6.address, &subnet.net.ipv6.address, sizeof(subnet.net.ipv6))) {
 313                                         continue;
 314                                 }
 315                         }
 316                 }
 317
 318                 if(find.type == SUBNET_MAC) {
 319                         if(memcmp(&find.net.mac.address, &subnet.net.mac.address, sizeof(subnet.net.mac))) {
 320                                 continue;
 321                         }
 322                 }
 323
 324                 found = true;
 325                 printf("Subnet: %s\n", strip_weight(netstr));
 326                 printf("Owner:  %s\n", owner);
 327         }
 328
 329         if(!found) {
 330                 if(address) {
 331                         fprintf(stderr, "Unknown address %s.\n", item);
 332                 } else {
 333                         fprintf(stderr, "Unknown subnet %s.\n", item);
 334                 }
 335
 336                 return 1;
 337         }
 338
 339         return 0;
 340 }
 341
 342 int info(int fd, const char *item) {
 343         if(check_id(item)) {
 344                 return info_node(fd, item);
 345         }
 346
 347         if(strchr(item, '.') || strchr(item, ':')) {
 348                 return info_subnet(fd, item);
 349         }
 350
 351         fprintf(stderr, "Argument is not a node name, subnet or address.\n");
 352         return 1;
 353 }