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 "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         if(len >= 3 && !strcmp(netstr + len - 3, "#10"))
  41                 netstr[len - 3] = 0;
  42         return netstr;
  43 }
  44
  45 static int info_node(int fd, const char *item) {
  46         // Check the list of nodes
  47         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_NODES, item);
  48
  49         bool found = false;
  50         char line[4096];
  51
  52         char node[4096];
  53         char from[4096];
  54         char to[4096];
  55         char subnet[4096];
  56         char host[4096];
  57         char port[4096];
  58         char via[4096];
  59         char nexthop[4096];
  60         int code, req, cipher, digest, maclength, compression, distance;
  61         short int pmtu, minmtu, maxmtu;
  62         unsigned int options;
  63         union {
  64                 node_status_t bits;
  65                 uint32_t raw;
  66         } status_union;
  67         node_status_t status;
  68         long int last_state_change;
  69
  70         while(recvline(fd, line, sizeof line)) {
  71                 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);
  72
  73                 if(n == 2)
  74                         break;
  75
  76                 if(n != 18) {
  77                         fprintf(stderr, "Unable to parse node dump from tincd.\n");
  78                         return 1;
  79                 }
  80
  81                 if(!strcmp(node, item)) {
  82                         found = true;
  83                         break;
  84                 }
  85         }
  86
  87         if(!found) {
  88                 fprintf(stderr, "Unknown node %s.\n", item);
  89                 return 1;
  90         }
  91
  92         while(recvline(fd, line, sizeof line)) {
  93                 if(sscanf(line, "%d %d %s", &code, &req, node) == 2)
  94                         break;
  95         }
  96
  97         printf("Node:         %s\n", item);
  98         printf("Address:      %s port %s\n", host, port);
  99
 100         char timestr[32] = "never";
 101         time_t lsc_time = last_state_change;
 102
 103         if(last_state_change)
 104                 strftime(timestr, sizeof timestr, "%Y-%m-%d %H:%M:%S", localtime(&lsc_time));
 105
 106         status = status_union.bits;
 107
 108         if(status.reachable)
 109                 printf("Online since: %s\n", timestr);
 110         else
 111                 printf("Last seen:    %s\n", timestr);
 112
 113         printf("Status:      ");
 114         if(status.validkey)
 115                 printf(" validkey");
 116         if(status.visited)
 117                 printf(" visited");
 118         if(status.reachable)
 119                 printf(" reachable");
 120         if(status.indirect)
 121                 printf(" indirect");
 122         if(status.sptps)
 123                 printf(" sptps");
 124         if(status.udp_confirmed)
 125                 printf(" udp_confirmed");
 126         printf("\n");
 127
 128         printf("Options:     ");
 129         if(options & OPTION_INDIRECT)
 130                 printf(" indirect");
 131         if(options & OPTION_TCPONLY)
 132                 printf(" tcponly");
 133         if(options & OPTION_PMTU_DISCOVERY)
 134                 printf(" pmtu_discovery");
 135         if(options & OPTION_CLAMP_MSS)
 136                 printf(" clamp_mss");
 137         printf("\n");
 138         printf("Protocol:     %d.%d\n", PROT_MAJOR, OPTION_VERSION(options));
 139         printf("Reachability: ");
 140         if(!strcmp(host, "MYSELF"))
 141                 printf("can reach itself\n");
 142         else if(!status.reachable)
 143                 printf("unreachable\n");
 144         else if(strcmp(via, item))
 145                 printf("indirectly via %s\n", via);
 146         else if(!status.validkey)
 147                 printf("unknown\n");
 148         else if(minmtu > 0)
 149                 printf("directly with UDP\nPMTU:         %d\n", pmtu);
 150         else if(!strcmp(nexthop, item))
 151                 printf("directly with TCP\n");
 152         else
 153                 printf("none, forwarded via %s\n", nexthop);
 154
 155         // List edges
 156         printf("Edges:       ");
 157         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_EDGES, item);
 158         while(recvline(fd, line, sizeof line)) {
 159                 int n = sscanf(line, "%d %d %s %s", &code, &req, from, to);
 160                 if(n == 2)
 161                         break;
 162                 if(n != 4) {
 163                         fprintf(stderr, "Unable to parse edge dump from tincd.\n%s\n", line);
 164                         return 1;
 165                 }
 166                 if(!strcmp(from, item))
 167                         printf(" %s", to);
 168         }
 169         printf("\n");
 170
 171         // List subnets
 172         printf("Subnets:     ");
 173         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_SUBNETS, item);
 174         while(recvline(fd, line, sizeof line)) {
 175                 int n = sscanf(line, "%d %d %s %s", &code, &req, subnet, from);
 176                 if(n == 2)
 177                         break;
 178                 if(n != 4) {
 179                         fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
 180                         return 1;
 181                 }
 182                 if(!strcmp(from, item))
 183                         printf(" %s", strip_weight(subnet));
 184         }
 185         printf("\n");
 186
 187         return 0;
 188 }
 189
 190 static int info_subnet(int fd, const char *item) {
 191         subnet_t subnet, find;
 192
 193         if(!str2net(&find, item)) {
 194                 fprintf(stderr, "Could not parse subnet or address '%s'.\n", item);
 195                 return 1;
 196         }
 197
 198         bool address = !strchr(item, '/');
 199         bool weight = strchr(item, '#');
 200         bool found = false;
 201
 202         char line[4096];
 203         char netstr[4096];
 204         char owner[4096];
 205
 206         int code, req;
 207
 208         sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_SUBNETS, item);
 209         while(recvline(fd, line, sizeof line)) {
 210                 int n = sscanf(line, "%d %d %s %s", &code, &req, netstr, owner);
 211                 if(n == 2)
 212                         break;
 213
 214                 if(n != 4 || !str2net(&subnet, netstr)) {
 215                         fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
 216                         return 1;
 217                 }
 218
 219                 if(find.type != subnet.type)
 220                         continue;
 221
 222                 if(weight) {
 223                         if(find.weight != subnet.weight)
 224                                 continue;
 225                 }
 226
 227                 if(find.type == SUBNET_IPV4) {
 228                         if(address) {
 229                                 if(maskcmp(&find.net.ipv4.address, &subnet.net.ipv4.address, subnet.net.ipv4.prefixlength))
 230                                         continue;
 231                         } else {
 232                                 if(find.net.ipv4.prefixlength != subnet.net.ipv4.prefixlength)
 233                                         continue;
 234                                 if(memcmp(&find.net.ipv4.address, &subnet.net.ipv4.address, sizeof subnet.net.ipv4))
 235                                         continue;
 236                         }
 237                 } else if(find.type == SUBNET_IPV6) {
 238                         if(address) {
 239                                 if(maskcmp(&find.net.ipv6.address, &subnet.net.ipv6.address, subnet.net.ipv6.prefixlength))
 240                                         continue;
 241                         } else {
 242                                 if(find.net.ipv6.prefixlength != subnet.net.ipv6.prefixlength)
 243                                         continue;
 244                                 if(memcmp(&find.net.ipv6.address, &subnet.net.ipv6.address, sizeof subnet.net.ipv6))
 245                                         continue;
 246                         }
 247                 } if(find.type == SUBNET_MAC) {
 248                         if(memcmp(&find.net.mac.address, &subnet.net.mac.address, sizeof subnet.net.mac))
 249                                 continue;
 250                 }
 251
 252                 found = true;
 253                 printf("Subnet: %s\n", strip_weight(netstr));
 254                 printf("Owner:  %s\n", owner);
 255         }
 256
 257         if(!found) {
 258                 if(address)
 259                         fprintf(stderr, "Unknown address %s.\n", item);
 260                 else
 261                         fprintf(stderr, "Unknown subnet %s.\n", item);
 262                 return 1;
 263         }
 264
 265         return 0;
 266 }
 267
 268 int info(int fd, const char *item) {
 269         if(check_id(item))
 270                 return info_node(fd, item);
 271         if(strchr(item, '.') || strchr(item, ':'))
 272                 return info_subnet(fd, item);
 273
 274         fprintf(stderr, "Argument is not a node name, subnet or address.\n");
 275         return 1;
 276 }