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/* |
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conf.c -- configuration code |
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Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de> |
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|
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This file is part of GVPE. |
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|
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GVPE is free software; you can redistribute it and/or modify it |
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under the terms of the GNU General Public License as published by the |
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Free Software Foundation; either version 3 of the License, or (at your |
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option) any later version. |
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|
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This program is distributed in the hope that it will be useful, but |
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WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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Public License for more details. |
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|
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You should have received a copy of the GNU General Public License along |
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with this program; if not, see <http://www.gnu.org/licenses/>. |
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|
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Additional permission under GNU GPL version 3 section 7 |
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|
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If you modify this Program, or any covered work, by linking or |
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combining it with the OpenSSL project's OpenSSL library (or a modified |
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version of that library), containing parts covered by the terms of the |
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OpenSSL or SSLeay licenses, the licensors of this Program grant you |
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additional permission to convey the resulting work. Corresponding |
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Source for a non-source form of such a combination shall include the |
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source code for the parts of OpenSSL used as well as that of the |
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covered work. |
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*/ |
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|
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#include "config.h" |
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|
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#include <cstdio> |
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#include <cstdlib> |
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#include <cstring> |
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|
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#include <errno.h> |
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#include <netdb.h> |
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#include <sys/stat.h> |
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#include <sys/types.h> |
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#include <unistd.h> |
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|
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#include "netcompat.h" |
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|
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#include <openssl/err.h> |
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#include <openssl/pem.h> |
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#include <openssl/rsa.h> |
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#include <openssl/rand.h> |
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#include <openssl/bn.h> |
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|
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#include "conf.h" |
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#include "slog.h" |
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#include "util.h" |
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|
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char *confbase; |
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char *thisnode; |
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char *identname; |
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|
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struct configuration conf; |
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|
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u8 best_protocol (u8 protset) |
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{ |
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if (protset & PROT_IPv4 ) return PROT_IPv4; |
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if (protset & PROT_ICMPv4) return PROT_ICMPv4; |
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if (protset & PROT_UDPv4 ) return PROT_UDPv4; |
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if (protset & PROT_TCPv4 ) return PROT_TCPv4; |
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if (protset & PROT_DNSv4 ) return PROT_DNSv4; |
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|
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return 0; |
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} |
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|
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const char *strprotocol (u8 protocol) |
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{ |
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if (protocol & PROT_IPv4 ) return "rawip"; |
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if (protocol & PROT_ICMPv4) return "icmp"; |
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if (protocol & PROT_UDPv4 ) return "udp"; |
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if (protocol & PROT_TCPv4 ) return "tcp"; |
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if (protocol & PROT_DNSv4 ) return "dns"; |
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|
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return "<unknown>"; |
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} |
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|
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static bool |
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match_list (const vector<const char *> &list, const char *str) |
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{ |
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for (vector<const char *>::const_iterator i = list.end (); i-- > list.begin (); ) |
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if ((*i)[0] == '*' && !(*i)[1]) |
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return true; |
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else if (!strcmp (*i, str)) |
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return true; |
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|
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return false; |
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} |
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|
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bool |
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conf_node::may_direct (struct conf_node *other) |
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{ |
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if (match_list (allow_direct, other->nodename)) |
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return true; |
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|
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if (match_list (deny_direct, other->nodename)) |
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return false; |
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|
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return true; |
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} |
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|
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void |
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conf_node::print () |
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{ |
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printf ("%4d fe:fd:80:00:0%1x:%02x %c %-8.8s %-10.10s %s%s%d\n", |
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id, |
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id >> 8, id & 0xff, |
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compress ? 'Y' : 'N', |
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connectmode == C_ONDEMAND ? "ondemand" |
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: connectmode == C_NEVER ? "never" |
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: connectmode == C_ALWAYS ? "always" |
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: connectmode == C_DISABLED ? "disabled" |
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: "", |
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nodename, |
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hostname ? hostname : "", |
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hostname ? ":" : "", |
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hostname ? udp_port : 0 |
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); |
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} |
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|
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conf_node::~conf_node () |
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{ |
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#if 0 |
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// does not work, because string pointers etc. are shared |
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// is not called, however |
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if (rsa_key) |
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RSA_free (rsa_key); |
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|
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free (nodename); |
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free (hostname); |
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free (if_up_data); |
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#if ENABLE_DNS |
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free (domain); |
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free (dns_hostname); |
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#endif |
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#endif |
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} |
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|
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void configuration::init () |
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{ |
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memset (this, 0, sizeof (*this)); |
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|
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mtu = DEFAULT_MTU; |
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rekey = DEFAULT_REKEY; |
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keepalive = DEFAULT_KEEPALIVE; |
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llevel = L_INFO; |
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ip_proto = IPPROTO_GRE; |
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#if ENABLE_ICMP |
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icmp_type = ICMP_ECHOREPLY; |
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#endif |
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|
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default_node.udp_port = DEFAULT_UDPPORT; |
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default_node.tcp_port = DEFAULT_UDPPORT; // ehrm |
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default_node.connectmode = conf_node::C_ALWAYS; |
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default_node.compress = true; |
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default_node.protocols = 0; |
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default_node.max_retry = DEFAULT_MAX_RETRY; |
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default_node.max_ttl = DEFAULT_MAX_TTL; |
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default_node.max_queue = DEFAULT_MAX_QUEUE; |
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default_node.if_up_data = strdup (""); |
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|
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#if ENABLE_DNS |
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default_node.dns_port = 0; // default is 0 == client |
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|
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dns_forw_host = strdup ("127.0.0.1"); |
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dns_forw_port = 53; |
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dns_timeout_factor = DEFAULT_DNS_TIMEOUT_FACTOR; |
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dns_send_interval = DEFAULT_DNS_SEND_INTERVAL; |
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dns_overlap_factor = DEFAULT_DNS_OVERLAP_FACTOR; |
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dns_max_outstanding = DEFAULT_DNS_MAX_OUTSTANDING; |
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#endif |
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|
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conf.pidfilename = strdup (LOCALSTATEDIR "/run/gvpe.pid"); |
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} |
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|
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void configuration::cleanup() |
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{ |
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if (rsa_key) |
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RSA_free (rsa_key); |
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|
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rsa_key = 0; |
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|
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free (pidfilename); pidfilename = 0; |
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free (ifname); ifname = 0; |
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#if ENABLE_HTTP_PROXY |
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free (proxy_host); proxy_host = 0; |
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free (proxy_auth); proxy_auth = 0; |
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#endif |
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#if ENABLE_DNS |
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free (dns_forw_host); dns_forw_host = 0; |
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#endif |
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} |
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|
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void |
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configuration::clear () |
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{ |
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for (configuration::node_vector::iterator i = nodes.begin(); i != nodes.end(); ++i) |
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delete *i; |
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|
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nodes.clear (); |
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|
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cleanup (); |
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init (); |
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} |
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|
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#define parse_bool(target,name,trueval,falseval) do { \ |
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if (!strcmp (val, "yes")) target = trueval; \ |
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else if (!strcmp (val, "no")) target = falseval; \ |
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else if (!strcmp (val, "true")) target = trueval; \ |
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else if (!strcmp (val, "false")) target = falseval; \ |
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else if (!strcmp (val, "on")) target = trueval; \ |
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else if (!strcmp (val, "off")) target = falseval; \ |
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else \ |
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return _("illegal boolean value, only 'yes|true|on' or 'no|false|off' allowed. (ignored)"); \ |
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} while (0) |
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|
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const char * |
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configuration_parser::parse_line (char *line) |
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{ |
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{ |
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char *end = line + strlen (line); |
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|
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while (*end < ' ' && end >= line) |
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end--; |
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|
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*++end = 0; |
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} |
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|
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char *tok = line; |
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const char *var = strtok (tok, "\t ="); |
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tok = 0; |
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|
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if (!var || !var[0]) |
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return 0; /* no tokens on this line */ |
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|
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if (var[0] == '#') |
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return 0; /* comment: ignore */ |
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|
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char *val = strtok (NULL, "\t\n\r ="); |
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|
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if (!val || val[0] == '#') |
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return _("no value given for variable. (ignored)"); |
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|
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if (!strcmp (var, "on")) |
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{ |
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if (!::thisnode |
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|| (val[0] == '!' && strcmp (val + 1, ::thisnode)) |
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|| !strcmp (val, ::thisnode)) |
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return parse_line (strtok (NULL, "\n\r")); |
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else |
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return 0; |
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} |
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|
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// truly global |
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if (!strcmp (var, "loglevel")) |
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{ |
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loglevel l = string_to_loglevel (val); |
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|
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if (l == L_NONE) |
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return _("unknown loglevel. (skipping)"); |
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} |
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else if (!strcmp (var, "ip-proto")) |
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conf.ip_proto = atoi (val); |
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else if (!strcmp (var, "icmp-type")) |
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{ |
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#if ENABLE_ICMP |
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conf.icmp_type = atoi (val); |
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#endif |
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} |
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|
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// per config |
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else if (!strcmp (var, "node")) |
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{ |
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parse_argv (); |
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|
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conf.default_node.id++; |
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node = new conf_node (conf.default_node); |
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conf.nodes.push_back (node); |
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node->nodename = strdup (val); |
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|
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{ |
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char *fname; |
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FILE *f; |
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|
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asprintf (&fname, "%s/pubkey/%s", confbase, node->nodename); |
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|
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f = fopen (fname, "r"); |
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if (f) |
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{ |
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node->rsa_key = RSA_new (); |
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|
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if (!PEM_read_RSAPublicKey(f, &node->rsa_key, NULL, NULL)) |
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{ |
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ERR_load_RSA_strings (); ERR_load_PEM_strings (); |
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slog (L_ERR, _("unable to open public rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0)); |
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exit (EXIT_FAILURE); |
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} |
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|
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require (RSA_blinding_on (node->rsa_key, 0)); |
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|
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fclose (f); |
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} |
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else |
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{ |
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slog (need_keys ? L_ERR : L_NOTICE, _("unable to read public rsa key file '%s': %s"), fname, strerror (errno)); |
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|
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if (need_keys) |
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exit (EXIT_FAILURE); |
315 |
} |
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|
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free (fname); |
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} |
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|
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if (::thisnode && !strcmp (node->nodename, ::thisnode)) |
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conf.thisnode = node; |
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} |
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else if (!strcmp (var, "private-key")) |
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free (conf.prikeyfile), conf.prikeyfile = strdup (val); |
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else if (!strcmp (var, "ifpersist")) |
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parse_bool (conf.ifpersist, "ifpersist", true, false); |
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else if (!strcmp (var, "ifname")) |
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free (conf.ifname), conf.ifname = strdup (val); |
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else if (!strcmp (var, "rekey")) |
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conf.rekey = atoi (val); |
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else if (!strcmp (var, "keepalive")) |
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conf.keepalive = atoi (val); |
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else if (!strcmp (var, "mtu")) |
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conf.mtu = atoi (val); |
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else if (!strcmp (var, "if-up")) |
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free (conf.script_if_up), conf.script_if_up = strdup (val); |
337 |
else if (!strcmp (var, "node-up")) |
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free (conf.script_node_up), conf.script_node_up = strdup (val); |
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else if (!strcmp (var, "node-down")) |
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free (conf.script_node_down), conf.script_node_down = strdup (val); |
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else if (!strcmp (var, "pid-file")) |
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free (conf.pidfilename), conf.pidfilename = strdup (val); |
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else if (!strcmp (var, "dns-forw-host")) |
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{ |
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#if ENABLE_DNS |
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free (conf.dns_forw_host), conf.dns_forw_host = strdup (val); |
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#endif |
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} |
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else if (!strcmp (var, "dns-forw-port")) |
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{ |
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#if ENABLE_DNS |
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conf.dns_forw_port = atoi (val); |
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#endif |
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} |
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else if (!strcmp (var, "dns-timeout-factor")) |
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{ |
357 |
#if ENABLE_DNS |
358 |
conf.dns_timeout_factor = atof (val); |
359 |
#endif |
360 |
} |
361 |
else if (!strcmp (var, "dns-send-interval")) |
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{ |
363 |
#if ENABLE_DNS |
364 |
conf.dns_send_interval = atoi (val); |
365 |
#endif |
366 |
} |
367 |
else if (!strcmp (var, "dns-overlap-factor")) |
368 |
{ |
369 |
#if ENABLE_DNS |
370 |
conf.dns_overlap_factor = atof (val); |
371 |
#endif |
372 |
} |
373 |
else if (!strcmp (var, "dns-max-outstanding")) |
374 |
{ |
375 |
#if ENABLE_DNS |
376 |
conf.dns_max_outstanding = atoi (val); |
377 |
#endif |
378 |
} |
379 |
else if (!strcmp (var, "http-proxy-host")) |
380 |
{ |
381 |
#if ENABLE_HTTP_PROXY |
382 |
free (conf.proxy_host), conf.proxy_host = strdup (val); |
383 |
#endif |
384 |
} |
385 |
else if (!strcmp (var, "http-proxy-port")) |
386 |
{ |
387 |
#if ENABLE_HTTP_PROXY |
388 |
conf.proxy_port = atoi (val); |
389 |
#endif |
390 |
} |
391 |
else if (!strcmp (var, "http-proxy-auth")) |
392 |
{ |
393 |
#if ENABLE_HTTP_PROXY |
394 |
conf.proxy_auth = (char *)base64_encode ((const u8 *)val, strlen (val)); |
395 |
#endif |
396 |
} |
397 |
|
398 |
/* node-specific, non-defaultable */ |
399 |
else if (node != &conf.default_node && !strcmp (var, "hostname")) |
400 |
free (node->hostname), node->hostname = strdup (val); |
401 |
|
402 |
/* node-specific, defaultable */ |
403 |
else if (!strcmp (var, "udp-port")) |
404 |
node->udp_port = atoi (val); |
405 |
else if (!strcmp (var, "tcp-port")) |
406 |
node->tcp_port = atoi (val); |
407 |
else if (!strcmp (var, "dns-hostname")) |
408 |
{ |
409 |
#if ENABLE_DNS |
410 |
free (node->dns_hostname), node->dns_hostname = strdup (val); |
411 |
#endif |
412 |
} |
413 |
else if (!strcmp (var, "dns-port")) |
414 |
{ |
415 |
#if ENABLE_DNS |
416 |
node->dns_port = atoi (val); |
417 |
#endif |
418 |
} |
419 |
else if (!strcmp (var, "dns-domain")) |
420 |
{ |
421 |
#if ENABLE_DNS |
422 |
free (node->domain), node->domain = strdup (val); |
423 |
#endif |
424 |
} |
425 |
else if (!strcmp (var, "if-up-data")) |
426 |
free (node->if_up_data), node->if_up_data = strdup (val); |
427 |
else if (!strcmp (var, "router-priority")) |
428 |
node->routerprio = atoi (val); |
429 |
else if (!strcmp (var, "max-retry")) |
430 |
node->max_retry = atoi (val); |
431 |
else if (!strcmp (var, "connect")) |
432 |
{ |
433 |
if (!strcmp (val, "ondemand")) |
434 |
node->connectmode = conf_node::C_ONDEMAND; |
435 |
else if (!strcmp (val, "never")) |
436 |
node->connectmode = conf_node::C_NEVER; |
437 |
else if (!strcmp (val, "always")) |
438 |
node->connectmode = conf_node::C_ALWAYS; |
439 |
else if (!strcmp (val, "disabled")) |
440 |
node->connectmode = conf_node::C_DISABLED; |
441 |
else |
442 |
return _("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled'. (ignored)"); |
443 |
} |
444 |
else if (!strcmp (var, "inherit-tos")) |
445 |
parse_bool (node->inherit_tos, "inherit-tos", true, false); |
446 |
else if (!strcmp (var, "compress")) |
447 |
parse_bool (node->compress, "compress", true, false); |
448 |
// all these bool options really really cost a lot of executable size! |
449 |
else if (!strcmp (var, "enable-tcp")) |
450 |
{ |
451 |
#if ENABLE_TCP |
452 |
u8 v; parse_bool (v, "enable-tcp" , PROT_TCPv4, 0); node->protocols = (node->protocols & ~PROT_TCPv4) | v; |
453 |
#endif |
454 |
} |
455 |
else if (!strcmp (var, "enable-icmp")) |
456 |
{ |
457 |
#if ENABLE_ICMP |
458 |
u8 v; parse_bool (v, "enable-icmp" , PROT_ICMPv4, 0); node->protocols = (node->protocols & ~PROT_ICMPv4) | v; |
459 |
#endif |
460 |
} |
461 |
else if (!strcmp (var, "enable-dns")) |
462 |
{ |
463 |
#if ENABLE_DNS |
464 |
u8 v; parse_bool (v, "enable-dns" , PROT_DNSv4, 0); node->protocols = (node->protocols & ~PROT_DNSv4) | v; |
465 |
#endif |
466 |
} |
467 |
else if (!strcmp (var, "enable-udp")) |
468 |
{ |
469 |
u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) | v; |
470 |
} |
471 |
else if (!strcmp (var, "enable-rawip")) |
472 |
{ |
473 |
u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) | v; |
474 |
} |
475 |
else if (!strcmp (var, "allow-direct")) |
476 |
node->allow_direct.push_back (strdup (val)); |
477 |
else if (!strcmp (var, "deny-direct")) |
478 |
node->deny_direct.push_back (strdup (val)); |
479 |
else if (!strcmp (var, "max-ttl")) |
480 |
node->max_ttl = atof (val); |
481 |
else if (!strcmp (var, "max-queue")) |
482 |
node->max_queue = atoi (val); |
483 |
|
484 |
// unknown or misplaced |
485 |
else |
486 |
return _("unknown configuration directive. (ignored)"); |
487 |
|
488 |
return 0; |
489 |
} |
490 |
|
491 |
void conf_node::finalise () |
492 |
{ |
493 |
if (max_queue < 1) |
494 |
{ |
495 |
slog (L_WARN, _("%s: max-queue value invalid, setting it to 1."), nodename); |
496 |
max_queue = 1; |
497 |
} |
498 |
|
499 |
if (routerprio && (connectmode != C_ALWAYS && connectmode != C_DISABLED)) |
500 |
{ |
501 |
//slog (L_WARN, _("%s: has non-zero router-priority but either 'never' or 'ondemand' as connectmode, setting it to 'always'."), nodename); |
502 |
connectmode = C_ALWAYS; |
503 |
} |
504 |
} |
505 |
|
506 |
void configuration_parser::parse_argv () |
507 |
{ |
508 |
for (int i = 0; i < argc; ++i) |
509 |
{ |
510 |
char *v = argv [i]; |
511 |
|
512 |
if (!*v) |
513 |
continue; |
514 |
|
515 |
char *enode = v; |
516 |
|
517 |
while (*enode != '.' && *enode > ' ' && *enode != '=' && *enode) |
518 |
enode++; |
519 |
|
520 |
if (*enode != '.') |
521 |
enode = 0; |
522 |
|
523 |
char *wnode = node == &conf.default_node |
524 |
? 0 |
525 |
: node->nodename; |
526 |
|
527 |
if ((!wnode && !enode) |
528 |
|| (wnode && enode && !strncmp (wnode, v, enode - v))) |
529 |
{ |
530 |
const char *warn = parse_line (enode ? enode + 1 : v); |
531 |
|
532 |
if (warn) |
533 |
slog (L_WARN, _("%s, while parsing command line option '%s'."), warn, v); |
534 |
|
535 |
*v = 0; |
536 |
} |
537 |
} |
538 |
} |
539 |
|
540 |
configuration_parser::configuration_parser (configuration &conf, |
541 |
bool need_keys, |
542 |
int argc, |
543 |
char **argv) |
544 |
: conf (conf),need_keys (need_keys), argc (argc), argv (argv) |
545 |
{ |
546 |
char *fname; |
547 |
FILE *f; |
548 |
|
549 |
conf.clear (); |
550 |
|
551 |
asprintf (&fname, "%s/gvpe.conf", confbase); |
552 |
f = fopen (fname, "r"); |
553 |
|
554 |
if (f) |
555 |
{ |
556 |
char line[16384]; |
557 |
int lineno = 0; |
558 |
node = &conf.default_node; |
559 |
|
560 |
while (fgets (line, sizeof (line), f)) |
561 |
{ |
562 |
lineno++; |
563 |
|
564 |
const char *warn = parse_line (line); |
565 |
|
566 |
if (warn) |
567 |
slog (L_WARN, _("%s, at '%s', line %d."), warn, fname, lineno); |
568 |
} |
569 |
|
570 |
fclose (f); |
571 |
|
572 |
parse_argv (); |
573 |
} |
574 |
else |
575 |
{ |
576 |
slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno)); |
577 |
exit (EXIT_FAILURE); |
578 |
} |
579 |
|
580 |
free (fname); |
581 |
|
582 |
fname = conf.config_filename (conf.prikeyfile, "hostkey"); |
583 |
|
584 |
f = fopen (fname, "r"); |
585 |
if (f) |
586 |
{ |
587 |
conf.rsa_key = RSA_new (); |
588 |
|
589 |
if (!PEM_read_RSAPrivateKey (f, &conf.rsa_key, NULL, NULL)) |
590 |
{ |
591 |
ERR_load_RSA_strings (); ERR_load_PEM_strings (); |
592 |
slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0)); |
593 |
exit (EXIT_FAILURE); |
594 |
} |
595 |
|
596 |
require (RSA_blinding_on (conf.rsa_key, 0)); |
597 |
|
598 |
fclose (f); |
599 |
} |
600 |
else |
601 |
{ |
602 |
slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno)); |
603 |
|
604 |
if (need_keys) |
605 |
exit (EXIT_FAILURE); |
606 |
} |
607 |
|
608 |
if (need_keys && ::thisnode |
609 |
&& conf.rsa_key && conf.thisnode && conf.thisnode->rsa_key) |
610 |
if (BN_cmp (conf.rsa_key->n, conf.thisnode->rsa_key->n) != 0 |
611 |
|| BN_cmp (conf.rsa_key->e, conf.thisnode->rsa_key->e) != 0) |
612 |
{ |
613 |
slog (L_NOTICE, _("private hostkey and public node key mismatch: is '%s' the correct node?"), ::thisnode); |
614 |
exit (EXIT_FAILURE); |
615 |
} |
616 |
|
617 |
free (fname); |
618 |
|
619 |
for (configuration::node_vector::iterator i = conf.nodes.begin(); i != conf.nodes.end(); ++i) |
620 |
(*i)->finalise (); |
621 |
} |
622 |
|
623 |
char *configuration::config_filename (const char *name, const char *dflt) |
624 |
{ |
625 |
char *fname; |
626 |
|
627 |
asprintf (&fname, name ? name : dflt, ::thisnode); |
628 |
|
629 |
if (!ABSOLUTE_PATH (fname)) |
630 |
{ |
631 |
char *rname = fname; |
632 |
asprintf (&fname, "%s/%s", confbase, rname); |
633 |
free (rname); |
634 |
} |
635 |
|
636 |
return fname; |
637 |
} |
638 |
|
639 |
void |
640 |
configuration::print () |
641 |
{ |
642 |
printf (_("\nConfiguration\n\n")); |
643 |
printf (_("# of nodes: %d\n"), nodes.size ()); |
644 |
printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>"); |
645 |
printf (_("MTU: %d\n"), mtu); |
646 |
printf (_("rekeying interval: %d\n"), rekey); |
647 |
printf (_("keepalive interval: %d\n"), keepalive); |
648 |
printf (_("interface: %s\n"), ifname); |
649 |
printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>"); |
650 |
printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) * 8 : -1); |
651 |
printf ("\n"); |
652 |
|
653 |
printf ("%4s %-17s %s %-8.8s %-10.10s %s\n", |
654 |
_("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port")); |
655 |
|
656 |
for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i) |
657 |
(*i)->print (); |
658 |
|
659 |
printf ("\n"); |
660 |
} |
661 |
|
662 |
configuration::configuration () |
663 |
{ |
664 |
asprintf (&confbase, "%s/gvpe", CONFDIR); |
665 |
|
666 |
init (); |
667 |
} |
668 |
|
669 |
configuration::~configuration () |
670 |
{ |
671 |
cleanup (); |
672 |
} |
673 |
|
674 |
|