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"tincctl info" gives more human readable information about nodes or subnets.

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This commit is contained in:
Guus Sliepen 2012-07-16 01:05:25 +02:00
parent 3c7003893f
commit 53735a9d96
6 changed files with 298 additions and 1 deletions
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4
doc/tinc.texi
View file

@ -2098,6 +2098,10 @@ Dump a list of all meta connections with ourself.
@item dump graph
Dump a graph of the VPN in dotty format.
@item info @var{node} | @var{subnet} | @var{address}
Show information about a particular @var{node}, @var{subnet} or @var{address}.
If an @var{address} is given, any matching subnet will be shown.
@item purge
Purges all information remembered about unreachable nodes.

4
doc/tincctl.8.in
View file

@ -101,6 +101,7 @@ If
is omitted, the default length will be 2048 bits.
When saving keys to existing files, tinc will not delete the old keys;
you have to remove them manually.
.It dump nodes
Dump a list of all known nodes in the VPN.
.It dump edges
@ -113,6 +114,9 @@ Dump a list of all meta connections with ourself.
Dump a graph of the VPN in
.Xr dotty 1
format.
.It info Ar node | subnet | address
Show information about a particular node, subnet or address.
If an address is given, any matching subnet will be shown.
.It purge
Purges all information remembered about unreachable nodes.
.It debug Ar N

2
src/Makefile.am
View file

@ -24,7 +24,7 @@ nodist_tincd_SOURCES = \
tincctl_SOURCES = \
utils.c getopt.c getopt1.c dropin.c \
list.c tincctl.c top.c
info.c list.c subnet_parse.c tincctl.c top.c
nodist_tincctl_SOURCES = \
ecdsagen.c rsagen.c

248
src/info.c Normal file
View file

@ -0,0 +1,248 @@
/*
info.c -- Show information about a node, subnet or address
Copyright (C) 2012 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "system.h"
#include "control_common.h"
#include "list.h"
#include "subnet.h"
#include "tincctl.h"
#include "info.h"
#include "xalloc.h"
void logger(int level, int priority, const char *format, ...) {
va_list ap;
va_start(ap, format);
vfprintf(stderr, format, ap);
va_end(ap);
}
static int info_node(int fd, const char *item) {
// Check the list of nodes
sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_NODES, item);
bool found = false;
char line[4096];
char node[4096];
char from[4096];
char to[4096];
char subnet[4096];
char host[4096];
char port[4096];
char via[4096];
char nexthop[4096];
int code, req, cipher, digest, maclength, compression, distance;
short int pmtu, minmtu, maxmtu;
unsigned int options;
node_status_t status;
while(recvline(fd, line, sizeof line)) {
int n = sscanf(line, "%d %d %s at %s port %s cipher %d digest %d maclength %d compression %d options %x status %04x nexthop %s via %s distance %d pmtu %hd (min %hd max %hd)", &code, &req, node, host, port, &cipher, &digest, &maclength, &compression, &options, (unsigned *)&status, nexthop, via, &distance, &pmtu, &minmtu, &maxmtu);
if(n == 2)
break;
if(n != 17) {
*port = 0;
n = sscanf(line, "%d %d %s at %s cipher %d digest %d maclength %d compression %d options %x status %04x nexthop %s via %s distance %d pmtu %hd (min %hd max %hd)", &code, &req, node, host, &cipher, &digest, &maclength, &compression, &options, (unsigned *)&status, nexthop, via, &distance, &pmtu, &minmtu, &maxmtu);
if(n != 16) {
fprintf(stderr, "Unable to parse node dump from tincd.\n");
return 1;
}
}
if(!strcmp(node, item)) {
found = true;
break;
}
}
if(!found) {
fprintf(stderr, "Unknown node %s.\n", item);
return 1;
}
while(recvline(fd, line, sizeof line)) {
if(sscanf(line, "%d %d %s", &code, &req, node) == 2)
break;
}
printf("Node: %s\n", item);
if(*port)
printf("Address: %s port %s\n", host, port);
printf("Status: ");
if(status.validkey)
printf(" validkey");
if(status.visited)
printf(" visited");
if(status.reachable)
printf(" reachable");
if(status.indirect)
printf(" indirect");
if(status.ecdh)
printf(" ecdh");
printf("\n");
printf("Options: ");
if(options & OPTION_INDIRECT)
printf(" indirect");
if(options & OPTION_TCPONLY)
printf(" tcponly");
if(options & OPTION_PMTU_DISCOVERY)
printf(" pmtu_discovery");
if(options & OPTION_CLAMP_MSS)
printf(" clamp_mss");
printf("\n");
printf("Reachability: ");
if(!*port)
printf("can reach itself\n");
else if(!status.reachable)
printf("unreachable\n");
else if(strcmp(via, item))
printf("indirectly via %s\n", via);
else if(!status.validkey)
printf("unknown\n");
else if(minmtu > 0)
printf("directly with UDP\nPMTU: %d\n", pmtu);
else if(!strcmp(nexthop, item))
printf("directly with TCP\n");
else
printf("none, forwarded via %s\n", nexthop);
// List edges
printf("Edges: ");
sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_EDGES, item);
while(recvline(fd, line, sizeof line)) {
int n = sscanf(line, "%d %d %s to %s", &code, &req, from, to);
if(n == 2)
break;
if(n != 4) {
fprintf(stderr, "Unable to parse edge dump from tincd.\n%s\n", line);
return 1;
}
if(!strcmp(from, item))
printf(" %s", to);
}
printf("\n");
// List subnets
printf("Subnets: ");
sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_SUBNETS, item);
while(recvline(fd, line, sizeof line)) {
int n = sscanf(line, "%d %d %s owner %s", &code, &req, subnet, from);
if(n == 2)
break;
if(n != 4) {
fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
return 1;
}
if(!strcmp(from, item))
printf(" %s", subnet);
}
printf("\n");
return 0;
}
static int info_subnet(int fd, const char *item) {
subnet_t subnet, find;
if(!str2net(&find, item))
return 1;
bool address = !strchr(item, '/');
bool weight = strchr(item, '#');
bool found = false;
char line[4096];
char netstr[4096];
char owner[4096];
int code, req;
sendline(fd, "%d %d %s", CONTROL, REQ_DUMP_SUBNETS, item);
while(recvline(fd, line, sizeof line)) {
int n = sscanf(line, "%d %d %s owner %s", &code, &req, netstr, owner);
if(n == 2)
break;
if(n != 4 || !str2net(&subnet, netstr)) {
fprintf(stderr, "Unable to parse subnet dump from tincd.\n");
return 1;
}
if(find.type != subnet.type)
continue;
if(weight) {
if(find.weight != subnet.weight)
continue;
}
if(find.type == SUBNET_IPV4) {
if(address) {
if(maskcmp(&find.net.ipv4.address, &subnet.net.ipv4.address, subnet.net.ipv4.prefixlength))
continue;
} else {
if(find.net.ipv4.prefixlength != subnet.net.ipv4.prefixlength)
continue;
if(memcmp(&find.net.ipv4.address, &subnet.net.ipv4.address, sizeof subnet.net.ipv4))
continue;
}
} else if(find.type == SUBNET_IPV6) {
if(address) {
if(maskcmp(&find.net.ipv6.address, &subnet.net.ipv6.address, subnet.net.ipv6.prefixlength))
continue;
} else {
if(find.net.ipv6.prefixlength != subnet.net.ipv6.prefixlength)
continue;
if(memcmp(&find.net.ipv6.address, &subnet.net.ipv6.address, sizeof subnet.net.ipv6))
continue;
}
} if(find.type == SUBNET_MAC) {
if(memcmp(&find.net.mac.address, &subnet.net.mac.address, sizeof subnet.net.mac))
continue;
}
found = true;
printf("Subnet: %s\n", netstr);
printf("Owner: %s\n", owner);
}
if(!found) {
if(address)
fprintf(stderr, "Unknown address %s.\n", item);
else
fprintf(stderr, "Unknown subnet %s.\n", item);
return 1;
}
return 0;
}
int info(int fd, const char *item) {
if(check_id(item))
return info_node(fd, item);
if(strchr(item, '.') || strchr(item, ':'))
return info_subnet(fd, item);
fprintf(stderr, "Argument is not a node name, subnet or address.\n");
return 1;
}

26
src/info.h Normal file
View file

@ -0,0 +1,26 @@
/*
info.h -- header for info.c.
Copyright (C) 2012 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef __TINC_INFO_H__
#define __TINC_INFO_H__
extern int info(int fd, const char *item);
#endif

15
src/tincctl.c
View file

@ -25,6 +25,7 @@
#include "protocol.h"
#include "control_common.h"
#include "ecdsagen.h"
#include "info.h"
#include "rsagen.h"
#include "utils.h"
#include "tincctl.h"
@ -120,6 +121,7 @@ static void usage(bool status) {
" subnets - all known subnets in the VPN\n"
" connections - all meta connections with ourself\n"
" graph - graph of the VPN in dotty format\n"
" info NODE|SUBNET|ADDRESS Give information about a particular NODE, SUBNET or ADDRESS.\n"
" purge Purge unreachable nodes\n"
" debug N Set debug level\n"
" retry Retry all outgoing connections\n"
@ -1286,6 +1288,18 @@ static int cmd_version(int argc, char *argv[]) {
return 0;
}
static int cmd_info(int argc, char *argv[]) {
if(argc != 2) {
fprintf(stderr, "Invalid number of arguments.\n");
return 1;
}
if(!connect_tincd())
return 1;
return info(fd, argv[1]);
}
static const char *conffiles[] = {
"tinc.conf",
"tinc-up",
@ -1374,6 +1388,7 @@ static const struct {
{"generate-ecdsa-keys", cmd_generate_ecdsa_keys},
{"help", cmd_help},
{"version", cmd_version},
{"info", cmd_info},
{"edit", cmd_edit},
{NULL, NULL},
};