| 1 |
/* |
| 2 |
conf.c -- configuration code |
| 3 |
Copyright (C) 2003-2004 Marc Lehmann <pcg@goof.com> |
| 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. |
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|
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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 |
|
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You should have received a copy of the GNU General Public License |
| 16 |
along with this program; if not, write to the Free Software |
| 17 |
Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 |
*/ |
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|
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#include "config.h" |
| 21 |
|
| 22 |
#include <cstdio> |
| 23 |
#include <cstdlib> |
| 24 |
#include <cstring> |
| 25 |
|
| 26 |
#include <errno.h> |
| 27 |
#include <netdb.h> |
| 28 |
#include <sys/stat.h> |
| 29 |
#include <sys/types.h> |
| 30 |
#include <unistd.h> |
| 31 |
|
| 32 |
#include "netcompat.h" |
| 33 |
|
| 34 |
#include <openssl/err.h> |
| 35 |
#include <openssl/pem.h> |
| 36 |
#include <openssl/rsa.h> |
| 37 |
#include <openssl/rand.h> |
| 38 |
#include <openssl/bn.h> |
| 39 |
|
| 40 |
#include "gettext.h" |
| 41 |
|
| 42 |
#include "conf.h" |
| 43 |
#include "slog.h" |
| 44 |
#include "util.h" |
| 45 |
|
| 46 |
char *confbase; |
| 47 |
char *thisnode; |
| 48 |
char *identname; |
| 49 |
|
| 50 |
struct configuration conf; |
| 51 |
|
| 52 |
u8 best_protocol (u8 protset) |
| 53 |
{ |
| 54 |
if (protset & PROT_IPv4 ) return PROT_IPv4; |
| 55 |
if (protset & PROT_ICMPv4) return PROT_ICMPv4; |
| 56 |
if (protset & PROT_UDPv4 ) return PROT_UDPv4; |
| 57 |
if (protset & PROT_TCPv4 ) return PROT_TCPv4; |
| 58 |
if (protset & PROT_DNSv4 ) return PROT_DNSv4; |
| 59 |
|
| 60 |
return 0; |
| 61 |
} |
| 62 |
|
| 63 |
const char *strprotocol (u8 protocol) |
| 64 |
{ |
| 65 |
if (protocol & PROT_IPv4 ) return "rawip"; |
| 66 |
if (protocol & PROT_ICMPv4) return "icmp"; |
| 67 |
if (protocol & PROT_UDPv4 ) return "udp"; |
| 68 |
if (protocol & PROT_TCPv4 ) return "tcp"; |
| 69 |
if (protocol & PROT_DNSv4 ) return "dns"; |
| 70 |
|
| 71 |
return "<unknown>"; |
| 72 |
} |
| 73 |
|
| 74 |
void |
| 75 |
conf_node::print () |
| 76 |
{ |
| 77 |
printf ("%4d fe:fd:80:00:0%1x:%02x %c %-8.8s %-10.10s %s%s%d\n", |
| 78 |
id, |
| 79 |
id >> 8, id & 0xff, |
| 80 |
compress ? 'Y' : 'N', |
| 81 |
connectmode == C_ONDEMAND ? "ondemand" : |
| 82 |
connectmode == C_NEVER ? "never" : |
| 83 |
connectmode == C_ALWAYS ? "always" : "", |
| 84 |
nodename, |
| 85 |
hostname ? hostname : "", |
| 86 |
hostname ? ":" : "", |
| 87 |
hostname ? udp_port : 0 |
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); |
| 89 |
} |
| 90 |
|
| 91 |
conf_node::~conf_node () |
| 92 |
{ |
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if (rsa_key) |
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RSA_free (rsa_key); |
| 95 |
|
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free (nodename); |
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free (hostname); |
| 98 |
free (domain); |
| 99 |
} |
| 100 |
|
| 101 |
void configuration::init () |
| 102 |
{ |
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memset (this, 0, sizeof (*this)); |
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|
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mtu = DEFAULT_MTU; |
| 106 |
rekey = DEFAULT_REKEY; |
| 107 |
keepalive = DEFAULT_KEEPALIVE; |
| 108 |
llevel = L_INFO; |
| 109 |
ip_proto = IPPROTO_GRE; |
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#if ENABLE_ICMP |
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icmp_type = ICMP_ECHOREPLY; |
| 112 |
#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 |
| 116 |
default_node.connectmode = conf_node::C_ALWAYS; |
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default_node.compress = true; |
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default_node.protocols = 0; |
| 119 |
default_node.max_retry = DEFAULT_MAX_RETRY; |
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|
| 121 |
conf.pidfilename = strdup (LOCALSTATEDIR "/run/gvpe.pid"); |
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} |
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|
| 124 |
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; |
| 136 |
#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 |
| 140 |
} |
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|
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void |
| 143 |
configuration::clear_config () |
| 144 |
{ |
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for (configuration::node_vector::iterator i = nodes.begin(); i != nodes.end(); ++i) |
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delete *i; |
| 147 |
|
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nodes.clear (); |
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|
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cleanup (); |
| 151 |
init (); |
| 152 |
} |
| 153 |
|
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#define parse_bool(target,name,trueval,falseval) \ |
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if (!strcmp (val, "yes")) target = trueval; \ |
| 156 |
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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slog (L_WARN, \ |
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_("illegal value for '%s', only 'yes|true|on' or 'no|false|off' allowed, at '%s' line %d"), \ |
| 164 |
name, var, fname, lineno); |
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|
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void configuration::read_config (bool need_keys) |
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{ |
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char *fname; |
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FILE *f; |
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|
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clear_config (); |
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|
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asprintf (&fname, "%s/gvpe.conf", confbase); |
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f = fopen (fname, "r"); |
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|
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if (f) |
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{ |
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char line[16384]; |
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int lineno = 0; |
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char *var, *val; |
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conf_node *node = &default_node; |
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|
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while (fgets (line, sizeof (line), f)) |
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{ |
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lineno++; |
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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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|
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retry: |
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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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continue; /* no tokens on this line */ |
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|
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if (var[0] == '#') |
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continue; /* comment: ignore */ |
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|
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val = strtok (NULL, "\t\n\r ="); |
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|
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if (!val || val[0] == '#') |
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{ |
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slog (L_WARN, |
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_("no value for variable `%s', at '%s' line %d"), |
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var, fname, lineno); |
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break; |
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} |
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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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goto retry; |
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|
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continue; |
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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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llevel = l; |
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else |
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slog (L_WARN, "'%s': %s, at '%s' line %d", val, UNKNOWN_LOGLEVEL, fname, line); |
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} |
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else if (!strcmp (var, "ip-proto")) |
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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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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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default_node.id++; |
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|
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node = new conf_node (default_node); |
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|
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nodes.push_back (node); |
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|
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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); |
| 274 |
} |
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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); |
| 286 |
} |
| 287 |
|
| 288 |
free (fname); |
| 289 |
} |
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|
| 291 |
if (::thisnode && !strcmp (node->nodename, ::thisnode)) |
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thisnode = node; |
| 293 |
} |
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else if (!strcmp (var, "private-key")) |
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free (prikeyfile), prikeyfile = strdup (val); |
| 296 |
else if (!strcmp (var, "ifpersist")) |
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{ |
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parse_bool (ifpersist, "ifpersist", true, false); |
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} |
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else if (!strcmp (var, "ifname")) |
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free (ifname), ifname = strdup (val); |
| 302 |
else if (!strcmp (var, "rekey")) |
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rekey = atoi (val); |
| 304 |
else if (!strcmp (var, "keepalive")) |
| 305 |
keepalive = atoi (val); |
| 306 |
else if (!strcmp (var, "mtu")) |
| 307 |
mtu = atoi (val); |
| 308 |
else if (!strcmp (var, "if-up")) |
| 309 |
free (script_if_up), script_if_up = strdup (val); |
| 310 |
else if (!strcmp (var, "node-up")) |
| 311 |
free (script_node_up), script_node_up = strdup (val); |
| 312 |
else if (!strcmp (var, "node-down")) |
| 313 |
free (script_node_down), script_node_down = strdup (val); |
| 314 |
else if (!strcmp (var, "pid-file")) |
| 315 |
free (pidfilename), pidfilename = strdup (val); |
| 316 |
else if (!strcmp (var, "dns-forw-host")) |
| 317 |
{ |
| 318 |
#if ENABLE_DNS |
| 319 |
free (dns_forw_host), dns_forw_host = strdup (val); |
| 320 |
#endif |
| 321 |
} |
| 322 |
else if (!strcmp (var, "dns-forw-port")) |
| 323 |
{ |
| 324 |
#if ENABLE_DNS |
| 325 |
dns_forw_port = atoi (val); |
| 326 |
#endif |
| 327 |
} |
| 328 |
else if (!strcmp (var, "http-proxy-host")) |
| 329 |
{ |
| 330 |
#if ENABLE_HTTP_PROXY |
| 331 |
free (proxy_host), proxy_host = strdup (val); |
| 332 |
#endif |
| 333 |
} |
| 334 |
else if (!strcmp (var, "http-proxy-port")) |
| 335 |
{ |
| 336 |
#if ENABLE_HTTP_PROXY |
| 337 |
proxy_port = atoi (val); |
| 338 |
#endif |
| 339 |
} |
| 340 |
else if (!strcmp (var, "http-proxy-auth")) |
| 341 |
{ |
| 342 |
#if ENABLE_HTTP_PROXY |
| 343 |
proxy_auth = (char *)base64_encode ((const u8 *)val, strlen (val)); |
| 344 |
#endif |
| 345 |
} |
| 346 |
|
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/* node-specific, non-defaultable */ |
| 348 |
else if (node != &default_node && !strcmp (var, "hostname")) |
| 349 |
free (node->hostname), node->hostname = strdup (val); |
| 350 |
|
| 351 |
/* node-specific, defaultable */ |
| 352 |
else if (!strcmp (var, "udp-port")) |
| 353 |
node->udp_port = atoi (val); |
| 354 |
else if (!strcmp (var, "tcp-port")) |
| 355 |
node->tcp_port = atoi (val); |
| 356 |
else if (!strcmp (var, "dns-port")) |
| 357 |
{ |
| 358 |
#if ENABLE_DNS |
| 359 |
node->dns_port = atoi (val); |
| 360 |
#endif |
| 361 |
} |
| 362 |
else if (!strcmp (var, "dns-domain")) |
| 363 |
{ |
| 364 |
#if ENABLE_DNS |
| 365 |
free (node->domain), node->domain = strdup (val); |
| 366 |
#endif |
| 367 |
} |
| 368 |
else if (!strcmp (var, "router-priority")) |
| 369 |
node->routerprio = atoi (val); |
| 370 |
else if (!strcmp (var, "max-retry")) |
| 371 |
node->max_retry = atoi (val); |
| 372 |
else if (!strcmp (var, "connect")) |
| 373 |
{ |
| 374 |
if (!strcmp (val, "ondemand")) |
| 375 |
node->connectmode = conf_node::C_ONDEMAND; |
| 376 |
else if (!strcmp (val, "never")) |
| 377 |
node->connectmode = conf_node::C_NEVER; |
| 378 |
else if (!strcmp (val, "always")) |
| 379 |
node->connectmode = conf_node::C_ALWAYS; |
| 380 |
else if (!strcmp (val, "disabled")) |
| 381 |
node->connectmode = conf_node::C_DISABLED; |
| 382 |
else |
| 383 |
slog (L_WARN, |
| 384 |
_("illegal value for 'connectmode', use one of 'ondemand', 'never', 'always' or 'disabled', at '%s' line %d"), |
| 385 |
var, fname, lineno); |
| 386 |
} |
| 387 |
else if (!strcmp (var, "inherit-tos")) |
| 388 |
{ |
| 389 |
parse_bool (node->inherit_tos, "inherit-tos", true, false); |
| 390 |
} |
| 391 |
else if (!strcmp (var, "compress")) |
| 392 |
{ |
| 393 |
parse_bool (node->compress, "compress", true, false); |
| 394 |
} |
| 395 |
// all these bool options really really cost a lot of executable size! |
| 396 |
else if (!strcmp (var, "enable-tcp")) |
| 397 |
{ |
| 398 |
#if ENABLE_TCP |
| 399 |
u8 v; parse_bool (v, "enable-tcp" , PROT_TCPv4, 0); node->protocols = (node->protocols & ~PROT_TCPv4) | v; |
| 400 |
#endif |
| 401 |
} |
| 402 |
else if (!strcmp (var, "enable-icmp")) |
| 403 |
{ |
| 404 |
#if ENABLE_ICMP |
| 405 |
u8 v; parse_bool (v, "enable-icmp" , PROT_ICMPv4, 0); node->protocols = (node->protocols & ~PROT_ICMPv4) | v; |
| 406 |
#endif |
| 407 |
} |
| 408 |
else if (!strcmp (var, "enable-dns")) |
| 409 |
{ |
| 410 |
#if ENABLE_DNS |
| 411 |
u8 v; parse_bool (v, "enable-dns" , PROT_DNSv4, 0); node->protocols = (node->protocols & ~PROT_DNSv4) | v; |
| 412 |
#endif |
| 413 |
} |
| 414 |
else if (!strcmp (var, "enable-udp")) |
| 415 |
{ |
| 416 |
u8 v; parse_bool (v, "enable-udp" , PROT_UDPv4, 0); node->protocols = (node->protocols & ~PROT_UDPv4) | v; |
| 417 |
} |
| 418 |
else if (!strcmp (var, "enable-rawip")) |
| 419 |
{ |
| 420 |
u8 v; parse_bool (v, "enable-rawip", PROT_IPv4, 0); node->protocols = (node->protocols & ~PROT_IPv4 ) | v; |
| 421 |
} |
| 422 |
|
| 423 |
// unknown or misplaced |
| 424 |
else |
| 425 |
slog (L_WARN, |
| 426 |
_("unknown or misplaced variable `%s', at '%s' line %d"), |
| 427 |
var, fname, lineno); |
| 428 |
} |
| 429 |
|
| 430 |
fclose (f); |
| 431 |
} |
| 432 |
else |
| 433 |
{ |
| 434 |
slog (L_ERR, _("unable to read config file '%s': %s"), fname, strerror (errno)); |
| 435 |
exit (EXIT_FAILURE); |
| 436 |
} |
| 437 |
|
| 438 |
free (fname); |
| 439 |
|
| 440 |
fname = config_filename (prikeyfile, "hostkey"); |
| 441 |
|
| 442 |
f = fopen (fname, "r"); |
| 443 |
if (f) |
| 444 |
{ |
| 445 |
rsa_key = RSA_new (); |
| 446 |
|
| 447 |
if (!PEM_read_RSAPrivateKey (f, &rsa_key, NULL, NULL)) |
| 448 |
{ |
| 449 |
ERR_load_RSA_strings (); ERR_load_PEM_strings (); |
| 450 |
slog (L_ERR, _("unable to read private rsa key file '%s': %s"), fname, ERR_error_string (ERR_get_error (), 0)); |
| 451 |
exit (EXIT_FAILURE); |
| 452 |
} |
| 453 |
|
| 454 |
require (RSA_blinding_on (rsa_key, 0)); |
| 455 |
|
| 456 |
fclose (f); |
| 457 |
} |
| 458 |
else |
| 459 |
{ |
| 460 |
slog (need_keys ? L_ERR : L_NOTICE, _("unable to open private rsa key file '%s': %s"), fname, strerror (errno)); |
| 461 |
|
| 462 |
if (need_keys) |
| 463 |
exit (EXIT_FAILURE); |
| 464 |
} |
| 465 |
|
| 466 |
if (need_keys && ::thisnode |
| 467 |
&& rsa_key && thisnode && thisnode->rsa_key) |
| 468 |
if (BN_cmp (rsa_key->n, thisnode->rsa_key->n) != 0 |
| 469 |
|| BN_cmp (rsa_key->e, thisnode->rsa_key->e) != 0) |
| 470 |
{ |
| 471 |
slog (L_NOTICE, _("private hostkey and public node key mismatch: is '%s' the correct node?"), ::thisnode); |
| 472 |
exit (EXIT_FAILURE); |
| 473 |
} |
| 474 |
|
| 475 |
free (fname); |
| 476 |
} |
| 477 |
|
| 478 |
char *configuration::config_filename (const char *name, const char *dflt) |
| 479 |
{ |
| 480 |
char *fname; |
| 481 |
|
| 482 |
asprintf (&fname, name ? name : dflt, ::thisnode); |
| 483 |
|
| 484 |
if (!ABSOLUTE_PATH (fname)) |
| 485 |
{ |
| 486 |
char *rname = fname; |
| 487 |
asprintf (&fname, "%s/%s", confbase, rname); |
| 488 |
free (rname); |
| 489 |
} |
| 490 |
|
| 491 |
return fname; |
| 492 |
} |
| 493 |
|
| 494 |
void |
| 495 |
configuration::print () |
| 496 |
{ |
| 497 |
printf (_("\nConfiguration\n\n")); |
| 498 |
printf (_("# of nodes: %d\n"), nodes.size ()); |
| 499 |
printf (_("this node: %s\n"), thisnode ? thisnode->nodename : "<unset>"); |
| 500 |
printf (_("MTU: %d\n"), mtu); |
| 501 |
printf (_("rekeying interval: %d\n"), rekey); |
| 502 |
printf (_("keepalive interval: %d\n"), keepalive); |
| 503 |
printf (_("interface: %s\n"), ifname); |
| 504 |
printf (_("primary rsa key: %s\n"), prikeyfile ? prikeyfile : "<default>"); |
| 505 |
printf (_("rsa key size: %d\n"), rsa_key ? RSA_size (rsa_key) * 8 : -1); |
| 506 |
printf ("\n"); |
| 507 |
|
| 508 |
printf ("%4s %-17s %s %-8.8s %-10.10s %s\n", |
| 509 |
_("ID#"), _("MAC"), _("Com"), _("Conmode"), _("Node"), _("Host:Port")); |
| 510 |
|
| 511 |
for (node_vector::iterator i = nodes.begin (); i != nodes.end (); ++i) |
| 512 |
(*i)->print (); |
| 513 |
|
| 514 |
printf ("\n"); |
| 515 |
} |
| 516 |
|
| 517 |
configuration::configuration () |
| 518 |
{ |
| 519 |
asprintf (&confbase, "%s/gvpe", CONFDIR); |
| 520 |
|
| 521 |
init (); |
| 522 |
} |
| 523 |
|
| 524 |
configuration::~configuration () |
| 525 |
{ |
| 526 |
cleanup (); |
| 527 |
} |
| 528 |
|
| 529 |
|
