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) 2012-2013 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         fputc('\n', stderr);
  35 }
  36
  37 char *strip_weight(char *netstr) {
  38         int len = strlen(netstr);
  39         if(len >= 3 && !strcmp(netstr + len - 3, "#10"))
  40                 netstr[len - 3] = 0;
  41         return netstr;
  42 }
  43
  44 static int info_node(int fd, const char *item) {
  45         // Check the list of nodes
  46         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_NODES, item);
  47
  48         bool found = false;
  49         char line[4096];
  50
  51         char node[4096];
  52         char from[4096];
  53         char to[4096];
  54         char subnet[4096];
  55         char host[4096];
  56         char port[4096];
  57         char via[4096];
  58         char nexthop[4096];
  59         int code, req, cipher, digest, maclength, compression, distance;
  60         short int pmtu, minmtu, maxmtu;
  61         unsigned int options;
  62         union {
  63                 node_status_t bits;
  64                 uint32_t raw;
  65         } status_union;
  66         node_status_t status;
  67         long int last_state_change;
  68
  69         while(recvline(fd, line, sizeof line)) {
  70                 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);
  71
  72                 if(n == 2)
  73                         break;
  74
  75                 if(n != 18) {
  76                         fprintf(stderr, "Unable to parse node dump from tincd.\n");
  77                         return 1;
  78                 }
  79
  80                 if(!strcmp(node, item)) {
  81                         found = true;
  82                         break;
  83                 }
  84         }
  85
  86         if(!found) {
  87                 fprintf(stderr, "Unknown node %s.\n", item);
  88                 return 1;
  89         }
  90
  91         while(recvline(fd, line, sizeof line)) {
  92                 if(sscanf(line, "%d %d %s", &code, &req, node) == 2)
  93                         break;
  94         }
  95
  96         printf("Node:         %s\n", item);
  97         printf("Address:      %s port %s\n", host, port);
  98
  99         char timestr[32] = "never";
 100         time_t lsc_time = last_state_change;
 101
 102         if(last_state_change)
 103                 strftime(timestr, sizeof timestr, "%Y-%m-%d %H:%M:%S", localtime(&lsc_time));
 104
 105         status = status_union.bits;
 106
 107         if(status.reachable)
 108                 printf("Online since: %s\n", timestr);
 109         else
 110                 printf("Last seen:    %s\n", timestr);
 111
 112         printf("Status:      ");
 113         if(status.validkey)
 114                 printf(" validkey");
 115         if(status.visited)
 116                 printf(" visited");
 117         if(status.reachable)
 118                 printf(" reachable");
 119         if(status.indirect)
 120                 printf(" indirect");
 121         if(status.sptps)
 122                 printf(" sptps");
 123         if(status.udp_confirmed)
 124                 printf(" udp_confirmed");
 125         printf("\n");
 126
 127         printf("Options:     ");
 128         if(options & OPTION_INDIRECT)
 129                 printf(" indirect");
 130         if(options & OPTION_TCPONLY)
 131                 printf(" tcponly");
 132         if(options & OPTION_PMTU_DISCOVERY)
 133                 printf(" pmtu_discovery");
 134         if(options & OPTION_CLAMP_MSS)
 135                 printf(" clamp_mss");
 136         printf("\n");
 137         printf("Protocol:     %d.%d\n", PROT_MAJOR, OPTION_VERSION(options));
 138         printf("Reachability: ");
 139         if(!strcmp(host, "MYSELF"))
 140                 printf("can reach itself\n");
 141         else if(!status.reachable)
 142                 printf("unreachable\n");
 143         else if(strcmp(via, item))
 144                 printf("indirectly via %s\n", via);
 145         else if(!status.validkey)
 146                 printf("unknown\n");
 147         else if(minmtu > 0)
 148                 printf("directly with UDP\nPMTU:         %d\n", pmtu);
 149         else if(!strcmp(nexthop, item))
 150                 printf("directly with TCP\n");
 151         else
 152                 printf("none, forwarded via %s\n", nexthop);
 153
 154         // List edges
 155         printf("Edges:       ");
 156         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_EDGES, item);
 157         while(recvline(fd, line, sizeof line)) {
 158                 int n = sscanf(line, "%d %d %s %s", &code, &req, from, to);
 159                 if(n == 2)
 160                         break;
 161                 if(n != 4) {
 162                         fprintf(stderr, "Unable to parse edge dump from tincd.\n%s\n", line);
 163                         return 1;
 164                 }
 165                 if(!strcmp(from, item))
 166                         printf(" %s", to);
 167         }
 168         printf("\n");
 169
 170         // List subnets
 171         printf("Subnets:     ");
 172         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_SUBNETS, item);
 173         while(recvline(fd, line, sizeof line)) {
 174                 int n = sscanf(line, "%d %d %s %s", &code, &req, subnet, from);
 175                 if(n == 2)
 176                         break;
 177                 if(n != 4) {
 178                         fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
 179                         return 1;
 180                 }
 181                 if(!strcmp(from, item))
 182                         printf(" %s", strip_weight(subnet));
 183         }
 184         printf("\n");
 185
 186         return 0;
 187 }
 188
 189 static int info_subnet(int fd, const char *item) {
 190         subnet_t subnet, find;
 191
 192         if(!str2net(&find, item)) {
 193                 fprintf(stderr, "Could not parse subnet or address '%s'.\n", item);
 194                 return 1;
 195         }
 196
 197         bool address = !strchr(item, '/');
 198         bool weight = strchr(item, '#');
 199         bool found = false;
 200
 201         char line[4096];
 202         char netstr[4096];
 203         char owner[4096];
 204
 205         int code, req;
 206
 207         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_SUBNETS, item);
 208         while(recvline(fd, line, sizeof line)) {
 209                 int n = sscanf(line, "%d %d %s %s", &code, &req, netstr, owner);
 210                 if(n == 2)
 211                         break;
 212
 213                 if(n != 4 || !str2net(&subnet, netstr)) {
 214                         fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
 215                         return 1;
 216                 }
 217
 218                 if(find.type != subnet.type)
 219                         continue;
 220
 221                 if(weight) {
 222                         if(find.weight != subnet.weight)
 223                                 continue;
 224                 }
 225
 226                 if(find.type == SUBNET_IPV4) {
 227                         if(address) {
 228                                 if(maskcmp(&find.net.ipv4.address, &subnet.net.ipv4.address, subnet.net.ipv4.prefixlength))
 229                                         continue;
 230                         } else {
 231                                 if(find.net.ipv4.prefixlength != subnet.net.ipv4.prefixlength)
 232                                         continue;
 233                                 if(memcmp(&find.net.ipv4.address, &subnet.net.ipv4.address, sizeof subnet.net.ipv4))
 234                                         continue;
 235                         }
 236                 } else if(find.type == SUBNET_IPV6) {
 237                         if(address) {
 238                                 if(maskcmp(&find.net.ipv6.address, &subnet.net.ipv6.address, subnet.net.ipv6.prefixlength))
 239                                         continue;
 240                         } else {
 241                                 if(find.net.ipv6.prefixlength != subnet.net.ipv6.prefixlength)
 242                                         continue;
 243                                 if(memcmp(&find.net.ipv6.address, &subnet.net.ipv6.address, sizeof subnet.net.ipv6))
 244                                         continue;
 245                         }
 246                 } if(find.type == SUBNET_MAC) {
 247                         if(memcmp(&find.net.mac.address, &subnet.net.mac.address, sizeof subnet.net.mac))
 248                                 continue;
 249                 }
 250
 251                 found = true;
 252                 printf("Subnet: %s\n", strip_weight(netstr));
 253                 printf("Owner:  %s\n", owner);
 254         }
 255
 256         if(!found) {
 257                 if(address)
 258                         fprintf(stderr, "Unknown address %s.\n", item);
 259                 else
 260                         fprintf(stderr, "Unknown subnet %s.\n", item);
 261                 return 1;
 262         }
 263
 264         return 0;
 265 }
 266
 267 int info(int fd, const char *item) {
 268         if(check_id(item))
 269                 return info_node(fd, item);
 270         if(strchr(item, '.') || strchr(item, ':'))
 271                 return info_subnet(fd, item);
 272
 273         fprintf(stderr, "Argument is not a node name, subnet or address.\n");
 274         return 1;
 275 }