+/*
+ 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;
+}
projects / tinc / commitdiff