www.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 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 "xalloc.h"
  28
  29 void logger(int level, int priority, const char *format, ...) {
  30         va_list ap;
  31         va_start(ap, format);
  32         vfprintf(stderr, format, ap);
  33         va_end(ap);
  34 }
  35
  36 char *strip_weight(char *netstr) {
  37         int len = strlen(netstr);
  38         if(len >= 3 && !strcmp(netstr + len - 3, "#10"))
  39                 netstr[len - 3] = 0;
  40         return netstr;
  41 }
  42
  43 static int info_node(int fd, const char *item) {
  44         // Check the list of nodes
  45         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_NODES, item);
  46
  47         bool found = false;
  48         char line[4096];
  49
  50         char node[4096];
  51         char from[4096];
  52         char to[4096];
  53         char subnet[4096];
  54         char host[4096];
  55         char port[4096];
  56         char via[4096];
  57         char nexthop[4096];
  58         int code, req, cipher, digest, maclength, compression, distance;
  59         short int pmtu, minmtu, maxmtu;
  60         unsigned int options;
  61         node_status_t status;
  62         long int last_state_change;
  63
  64         while(recvline(fd, line, sizeof line)) {
  65                 int n = sscanf(line, "%d %d %s %s port %s %d %d %d %d %x %x %s %s %d %hd %hd %hd %ld", &code, &req, node, host, port, &cipher, &digest, &maclength, &compression, &options, (unsigned *)&status, nexthop, via, &distance, &pmtu, &minmtu, &maxmtu, &last_state_change);
  66
  67                 if(n == 2)
  68                         break;
  69
  70                 if(n != 18) {
  71                         fprintf(stderr, "Unable to parse node dump from tincd.\n");
  72                         return 1;
  73                 }
  74
  75                 if(!strcmp(node, item)) {
  76                         found = true;
  77                         break;
  78                 }
  79         }
  80
  81         if(!found) {
  82                 fprintf(stderr, "Unknown node %s.\n", item);
  83                 return 1;
  84         }
  85
  86         while(recvline(fd, line, sizeof line)) {
  87                 if(sscanf(line, "%d %d %s", &code, &req, node) == 2)
  88                         break;
  89         }
  90
  91         printf("Node:         %s\n", item);
  92         printf("Address:      %s port %s\n", host, port);
  93
  94         char timestr[32] = "never";
  95         if(last_state_change)
  96                 strftime(timestr, sizeof timestr, "%Y-%m-%d %H:%M:%S", localtime(&last_state_change));
  97
  98         if(status.reachable)
  99                 printf("Online since: %s\n", timestr);
 100         else
 101                 printf("Last seen:    %s\n", timestr);
 102
 103         printf("Status:      ");
 104         if(status.validkey)
 105                 printf(" validkey");
 106         if(status.visited)
 107                 printf(" visited");
 108         if(status.reachable)
 109                 printf(" reachable");
 110         if(status.indirect)
 111                 printf(" indirect");
 112         if(status.sptps)
 113                 printf(" sptps");
 114         printf("\n");
 115
 116         printf("Options:     ");
 117         if(options & OPTION_INDIRECT)
 118                 printf(" indirect");
 119         if(options & OPTION_TCPONLY)
 120                 printf(" tcponly");
 121         if(options & OPTION_PMTU_DISCOVERY)
 122                 printf(" pmtu_discovery");
 123         if(options & OPTION_CLAMP_MSS)
 124                 printf(" clamp_mss");
 125         printf("\n");
 126         printf("Protocol:     %d.%d\n", PROT_MAJOR, OPTION_VERSION(options));
 127         printf("Reachability: ");
 128         if(!strcmp(host, "MYSELF"))
 129                 printf("can reach itself\n");
 130         else if(!status.reachable)
 131                 printf("unreachable\n");
 132         else if(strcmp(via, item))
 133                 printf("indirectly via %s\n", via);
 134         else if(!status.validkey)
 135                 printf("unknown\n");
 136         else if(minmtu > 0)
 137                 printf("directly with UDP\nPMTU:         %d\n", pmtu);
 138         else if(!strcmp(nexthop, item))
 139                 printf("directly with TCP\n");
 140         else
 141                 printf("none, forwarded via %s\n", nexthop);
 142
 143         // List edges
 144         printf("Edges:       ");
 145         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_EDGES, item);
 146         while(recvline(fd, line, sizeof line)) {
 147                 int n = sscanf(line, "%d %d %s %s", &code, &req, from, to);
 148                 if(n == 2)
 149                         break;
 150                 if(n != 4) {
 151                         fprintf(stderr, "Unable to parse edge dump from tincd.\n%s\n", line);
 152                         return 1;
 153                 }
 154                 if(!strcmp(from, item))
 155                         printf(" %s", to);
 156         }
 157         printf("\n");
 158
 159         // List subnets
 160         printf("Subnets:     ");
 161         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_SUBNETS, item);
 162         while(recvline(fd, line, sizeof line)) {
 163                 int n = sscanf(line, "%d %d %s %s", &code, &req, subnet, from);
 164                 if(n == 2)
 165                         break;
 166                 if(n != 4) {
 167                         fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
 168                         return 1;
 169                 }
 170                 if(!strcmp(from, item))
 171                         printf(" %s", strip_weight(subnet));
 172         }
 173         printf("\n");
 174
 175         return 0;
 176 }
 177
 178 static int info_subnet(int fd, const char *item) {
 179         subnet_t subnet, find;
 180
 181         if(!str2net(&find, item)) {
 182                 fprintf(stderr, "Could not parse subnet or address '%s'.\n", item);
 183                 return 1;
 184         }
 185
 186         bool address = !strchr(item, '/');
 187         bool weight = strchr(item, '#');
 188         bool found = false;
 189
 190         char line[4096];
 191         char netstr[4096];
 192         char owner[4096];
 193
 194         int code, req;
 195
 196         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_SUBNETS, item);
 197         while(recvline(fd, line, sizeof line)) {
 198                 int n = sscanf(line, "%d %d %s %s", &code, &req, netstr, owner);
 199                 if(n == 2)
 200                         break;
 201
 202                 if(n != 4 || !str2net(&subnet, netstr)) {
 203                         fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
 204                         return 1;
 205                 }
 206
 207                 if(find.type != subnet.type)
 208                         continue;
 209
 210                 if(weight) {
 211                         if(find.weight != subnet.weight)
 212                                 continue;
 213                 }
 214
 215                 if(find.type == SUBNET_IPV4) {
 216                         if(address) {
 217                                 if(maskcmp(&find.net.ipv4.address, &subnet.net.ipv4.address, subnet.net.ipv4.prefixlength))
 218                                         continue;
 219                         } else {
 220                                 if(find.net.ipv4.prefixlength != subnet.net.ipv4.prefixlength)
 221                                         continue;
 222                                 if(memcmp(&find.net.ipv4.address, &subnet.net.ipv4.address, sizeof subnet.net.ipv4))
 223                                         continue;
 224                         }
 225                 } else if(find.type == SUBNET_IPV6) {
 226                         if(address) {
 227                                 if(maskcmp(&find.net.ipv6.address, &subnet.net.ipv6.address, subnet.net.ipv6.prefixlength))
 228                                         continue;
 229                         } else {
 230                                 if(find.net.ipv6.prefixlength != subnet.net.ipv6.prefixlength)
 231                                         continue;
 232                                 if(memcmp(&find.net.ipv6.address, &subnet.net.ipv6.address, sizeof subnet.net.ipv6))
 233                                         continue;
 234                         }
 235                 } if(find.type == SUBNET_MAC) {
 236                         if(memcmp(&find.net.mac.address, &subnet.net.mac.address, sizeof subnet.net.mac))
 237                                 continue;
 238                 }
 239
 240                 found = true;
 241                 printf("Subnet: %s\n", strip_weight(netstr));
 242                 printf("Owner:  %s\n", owner);
 243         }
 244
 245         if(!found) {
 246                 if(address)
 247                         fprintf(stderr, "Unknown address %s.\n", item);
 248                 else
 249                         fprintf(stderr, "Unknown subnet %s.\n", item);
 250                 return 1;
 251         }
 252
 253         return 0;
 254 }
 255
 256 int info(int fd, const char *item) {
 257         if(check_id(item))
 258                 return info_node(fd, item);
 259         if(strchr(item, '.') || strchr(item, ':'))
 260                 return info_subnet(fd, item);
 261
 262         fprintf(stderr, "Argument is not a node name, subnet or address.\n");
 263         return 1;
 264 }