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         union {
  62                 node_status_t bits;
  63                 uint32_t raw;
  64         } status_union;
  65         node_status_t status;
  66         long int last_state_change;
  67
  68         while(recvline(fd, line, sizeof line)) {
  69                 int n = sscanf(line, "%d %d %s %s port %s %d %d %d %d %x %"PRIx32" %s %s %d %hd %hd %hd %ld", &code, &req, node, host, port, &cipher, &digest, &maclength, &compression, &options, &status_union.raw, nexthop, via, &distance, &pmtu, &minmtu, &maxmtu, &last_state_change);
  70
  71                 if(n == 2)
  72                         break;
  73
  74                 if(n != 18) {
  75                         fprintf(stderr, "Unable to parse node dump from tincd.\n");
  76                         return 1;
  77                 }
  78
  79                 if(!strcmp(node, item)) {
  80                         found = true;
  81                         break;
  82                 }
  83         }
  84
  85         if(!found) {
  86                 fprintf(stderr, "Unknown node %s.\n", item);
  87                 return 1;
  88         }
  89
  90         while(recvline(fd, line, sizeof line)) {
  91                 if(sscanf(line, "%d %d %s", &code, &req, node) == 2)
  92                         break;
  93         }
  94
  95         printf("Node:         %s\n", item);
  96         printf("Address:      %s port %s\n", host, port);
  97
  98         char timestr[32] = "never";
  99         time_t lsc_time = last_state_change;
 100
 101         if(last_state_change)
 102                 strftime(timestr, sizeof timestr, "%Y-%m-%d %H:%M:%S", localtime(&lsc_time));
 103
 104         status = status_union.bits;
 105
 106         if(status.reachable)
 107                 printf("Online since: %s\n", timestr);
 108         else
 109                 printf("Last seen:    %s\n", timestr);
 110
 111         printf("Status:      ");
 112         if(status.validkey)
 113                 printf(" validkey");
 114         if(status.visited)
 115                 printf(" visited");
 116         if(status.reachable)
 117                 printf(" reachable");
 118         if(status.indirect)
 119                 printf(" indirect");
 120         if(status.sptps)
 121                 printf(" sptps");
 122         if(status.udp_confirmed)
 123                 printf(" udp_confirmed");
 124         printf("\n");
 125
 126         printf("Options:     ");
 127         if(options & OPTION_INDIRECT)
 128                 printf(" indirect");
 129         if(options & OPTION_TCPONLY)
 130                 printf(" tcponly");
 131         if(options & OPTION_PMTU_DISCOVERY)
 132                 printf(" pmtu_discovery");
 133         if(options & OPTION_CLAMP_MSS)
 134                 printf(" clamp_mss");
 135         printf("\n");
 136         printf("Protocol:     %d.%d\n", PROT_MAJOR, OPTION_VERSION(options));
 137         printf("Reachability: ");
 138         if(!strcmp(host, "MYSELF"))
 139                 printf("can reach itself\n");
 140         else if(!status.reachable)
 141                 printf("unreachable\n");
 142         else if(strcmp(via, item))
 143                 printf("indirectly via %s\n", via);
 144         else if(!status.validkey)
 145                 printf("unknown\n");
 146         else if(minmtu > 0)
 147                 printf("directly with UDP\nPMTU:         %d\n", pmtu);
 148         else if(!strcmp(nexthop, item))
 149                 printf("directly with TCP\n");
 150         else
 151                 printf("none, forwarded via %s\n", nexthop);
 152
 153         // List edges
 154         printf("Edges:       ");
 155         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_EDGES, item);
 156         while(recvline(fd, line, sizeof line)) {
 157                 int n = sscanf(line, "%d %d %s %s", &code, &req, from, to);
 158                 if(n == 2)
 159                         break;
 160                 if(n != 4) {
 161                         fprintf(stderr, "Unable to parse edge dump from tincd.\n%s\n", line);
 162                         return 1;
 163                 }
 164                 if(!strcmp(from, item))
 165                         printf(" %s", to);
 166         }
 167         printf("\n");
 168
 169         // List subnets
 170         printf("Subnets:     ");
 171         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_SUBNETS, item);
 172         while(recvline(fd, line, sizeof line)) {
 173                 int n = sscanf(line, "%d %d %s %s", &code, &req, subnet, from);
 174                 if(n == 2)
 175                         break;
 176                 if(n != 4) {
 177                         fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
 178                         return 1;
 179                 }
 180                 if(!strcmp(from, item))
 181                         printf(" %s", strip_weight(subnet));
 182         }
 183         printf("\n");
 184
 185         return 0;
 186 }
 187
 188 static int info_subnet(int fd, const char *item) {
 189         subnet_t subnet, find;
 190
 191         if(!str2net(&find, item)) {
 192                 fprintf(stderr, "Could not parse subnet or address '%s'.\n", item);
 193                 return 1;
 194         }
 195
 196         bool address = !strchr(item, '/');
 197         bool weight = strchr(item, '#');
 198         bool found = false;
 199
 200         char line[4096];
 201         char netstr[4096];
 202         char owner[4096];
 203
 204         int code, req;
 205
 206         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_SUBNETS, item);
 207         while(recvline(fd, line, sizeof line)) {
 208                 int n = sscanf(line, "%d %d %s %s", &code, &req, netstr, owner);
 209                 if(n == 2)
 210                         break;
 211
 212                 if(n != 4 || !str2net(&subnet, netstr)) {
 213                         fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
 214                         return 1;
 215                 }
 216
 217                 if(find.type != subnet.type)
 218                         continue;
 219
 220                 if(weight) {
 221                         if(find.weight != subnet.weight)
 222                                 continue;
 223                 }
 224
 225                 if(find.type == SUBNET_IPV4) {
 226                         if(address) {
 227                                 if(maskcmp(&find.net.ipv4.address, &subnet.net.ipv4.address, subnet.net.ipv4.prefixlength))
 228                                         continue;
 229                         } else {
 230                                 if(find.net.ipv4.prefixlength != subnet.net.ipv4.prefixlength)
 231                                         continue;
 232                                 if(memcmp(&find.net.ipv4.address, &subnet.net.ipv4.address, sizeof subnet.net.ipv4))
 233                                         continue;
 234                         }
 235                 } else if(find.type == SUBNET_IPV6) {
 236                         if(address) {
 237                                 if(maskcmp(&find.net.ipv6.address, &subnet.net.ipv6.address, subnet.net.ipv6.prefixlength))
 238                                         continue;
 239                         } else {
 240                                 if(find.net.ipv6.prefixlength != subnet.net.ipv6.prefixlength)
 241                                         continue;
 242                                 if(memcmp(&find.net.ipv6.address, &subnet.net.ipv6.address, sizeof subnet.net.ipv6))
 243                                         continue;
 244                         }
 245                 } if(find.type == SUBNET_MAC) {
 246                         if(memcmp(&find.net.mac.address, &subnet.net.mac.address, sizeof subnet.net.mac))
 247                                 continue;
 248                 }
 249
 250                 found = true;
 251                 printf("Subnet: %s\n", strip_weight(netstr));
 252                 printf("Owner:  %s\n", owner);
 253         }
 254
 255         if(!found) {
 256                 if(address)
 257                         fprintf(stderr, "Unknown address %s.\n", item);
 258                 else
 259                         fprintf(stderr, "Unknown subnet %s.\n", item);
 260                 return 1;
 261         }
 262
 263         return 0;
 264 }
 265
 266 int info(int fd, const char *item) {
 267         if(check_id(item))
 268                 return info_node(fd, item);
 269         if(strchr(item, '.') || strchr(item, ':'))
 270                 return info_subnet(fd, item);
 271
 272         fprintf(stderr, "Argument is not a node name, subnet or address.\n");
 273         return 1;
 274 }