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pcg |
1.1 |
/* |
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connection.C -- manage a single connection |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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#include "config.h" |
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extern "C" { |
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# include "lzf/lzf.h" |
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} |
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#include <list> |
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pcg |
1.2 |
#include <openssl/rand.h> |
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#include <openssl/evp.h> |
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#include <openssl/rsa.h> |
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#include <openssl/err.h> |
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pcg |
1.1 |
#include "gettext.h" |
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#include "conf.h" |
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#include "slog.h" |
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#include "device.h" |
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pcg |
1.2 |
#include "vpn.h" |
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pcg |
1.1 |
#include "connection.h" |
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#if !HAVE_RAND_PSEUDO_BYTES |
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# define RAND_pseudo_bytes RAND_bytes |
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#endif |
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#define MAGIC "vped\xbd\xc6\xdb\x82" // 8 bytes of magic |
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struct crypto_ctx |
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{ |
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EVP_CIPHER_CTX cctx; |
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HMAC_CTX hctx; |
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crypto_ctx (const rsachallenge &challenge, int enc); |
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~crypto_ctx (); |
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}; |
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crypto_ctx::crypto_ctx (const rsachallenge &challenge, int enc) |
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{ |
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EVP_CIPHER_CTX_init (&cctx); |
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EVP_CipherInit_ex (&cctx, CIPHER, 0, &challenge[CHG_CIPHER_KEY], 0, enc); |
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HMAC_CTX_init (&hctx); |
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HMAC_Init_ex (&hctx, &challenge[CHG_HMAC_KEY], HMAC_KEYLEN, DIGEST, 0); |
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} |
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crypto_ctx::~crypto_ctx () |
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{ |
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EVP_CIPHER_CTX_cleanup (&cctx); |
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HMAC_CTX_cleanup (&hctx); |
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} |
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static void |
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rsa_hash (const rsaid &id, const rsachallenge &chg, rsaresponse &h) |
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{ |
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EVP_MD_CTX ctx; |
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EVP_MD_CTX_init (&ctx); |
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EVP_DigestInit (&ctx, RSA_HASH); |
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EVP_DigestUpdate(&ctx, &chg, sizeof chg); |
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EVP_DigestUpdate(&ctx, &id, sizeof id); |
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EVP_DigestFinal (&ctx, (unsigned char *)&h, 0); |
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EVP_MD_CTX_cleanup (&ctx); |
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} |
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struct rsa_entry { |
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tstamp expire; |
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rsaid id; |
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rsachallenge chg; |
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}; |
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struct rsa_cache : list<rsa_entry> |
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{ |
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pcg |
1.4 |
void cleaner_cb (time_watcher &w); time_watcher cleaner; |
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pcg |
1.1 |
|
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bool find (const rsaid &id, rsachallenge &chg) |
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{ |
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for (iterator i = begin (); i != end (); ++i) |
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{ |
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if (!memcmp (&id, &i->id, sizeof id) && i->expire > NOW) |
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{ |
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memcpy (&chg, &i->chg, sizeof chg); |
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erase (i); |
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return true; |
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} |
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} |
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if (cleaner.at < NOW) |
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cleaner.start (NOW + RSA_TTL); |
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return false; |
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} |
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void gen (rsaid &id, rsachallenge &chg) |
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{ |
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rsa_entry e; |
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RAND_bytes ((unsigned char *)&id, sizeof id); |
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RAND_bytes ((unsigned char *)&chg, sizeof chg); |
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e.expire = NOW + RSA_TTL; |
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e.id = id; |
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memcpy (&e.chg, &chg, sizeof chg); |
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push_back (e); |
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if (cleaner.at < NOW) |
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cleaner.start (NOW + RSA_TTL); |
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} |
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rsa_cache () |
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: cleaner (this, &rsa_cache::cleaner_cb) |
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{ } |
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} rsa_cache; |
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pcg |
1.4 |
void rsa_cache::cleaner_cb (time_watcher &w) |
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pcg |
1.1 |
{ |
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if (empty ()) |
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pcg |
1.4 |
w.at = TSTAMP_CANCEL; |
138 |
pcg |
1.1 |
else |
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{ |
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pcg |
1.4 |
w.at = NOW + RSA_TTL; |
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pcg |
1.1 |
|
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for (iterator i = begin (); i != end (); ) |
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if (i->expire <= NOW) |
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i = erase (i); |
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else |
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++i; |
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} |
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} |
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////////////////////////////////////////////////////////////////////////////// |
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void pkt_queue::put (tap_packet *p) |
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{ |
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if (queue[i]) |
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{ |
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delete queue[i]; |
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j = (j + 1) % QUEUEDEPTH; |
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} |
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queue[i] = p; |
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i = (i + 1) % QUEUEDEPTH; |
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} |
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tap_packet *pkt_queue::get () |
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{ |
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tap_packet *p = queue[j]; |
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if (p) |
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{ |
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queue[j] = 0; |
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j = (j + 1) % QUEUEDEPTH; |
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} |
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return p; |
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} |
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pkt_queue::pkt_queue () |
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{ |
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memset (queue, 0, sizeof (queue)); |
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i = 0; |
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j = 0; |
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} |
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pkt_queue::~pkt_queue () |
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{ |
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for (i = QUEUEDEPTH; --i > 0; ) |
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delete queue[i]; |
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} |
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struct net_rateinfo { |
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u32 host; |
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double pcnt, diff; |
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tstamp last; |
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}; |
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// only do action once every x seconds per host whole allowing bursts. |
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// this implementation ("splay list" ;) is inefficient, |
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// but low on resources. |
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struct net_rate_limiter : list<net_rateinfo> |
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{ |
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pcg |
1.9 |
static const double ALPHA = 1. - 1. / 180.; // allow bursts |
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static const double CUTOFF = 10.; // one event every CUTOFF seconds |
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static const double EXPIRE = CUTOFF * 30.; // expire entries after this time |
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pcg |
1.1 |
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bool can (const sockinfo &si) { return can((u32)si.host); } |
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bool can (u32 host); |
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}; |
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net_rate_limiter auth_rate_limiter, reset_rate_limiter; |
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bool net_rate_limiter::can (u32 host) |
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{ |
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iterator i; |
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for (i = begin (); i != end (); ) |
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if (i->host == host) |
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break; |
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else if (i->last < NOW - EXPIRE) |
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i = erase (i); |
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else |
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i++; |
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if (i == end ()) |
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{ |
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net_rateinfo ri; |
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ri.host = host; |
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ri.pcnt = 1.; |
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ri.diff = CUTOFF * (1. / (1. - ALPHA)); |
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ri.last = NOW; |
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push_front (ri); |
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return true; |
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} |
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else |
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{ |
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net_rateinfo ri (*i); |
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erase (i); |
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ri.pcnt = ri.pcnt * ALPHA; |
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ri.diff = ri.diff * ALPHA + (NOW - ri.last); |
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ri.last = NOW; |
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bool send = ri.diff / ri.pcnt > CUTOFF; |
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if (send) |
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ri.pcnt++; |
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push_front (ri); |
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return send; |
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} |
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} |
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///////////////////////////////////////////////////////////////////////////// |
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unsigned char hmac_packet::hmac_digest[EVP_MAX_MD_SIZE]; |
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void hmac_packet::hmac_gen (crypto_ctx *ctx) |
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{ |
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unsigned int xlen; |
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HMAC_CTX *hctx = &ctx->hctx; |
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HMAC_Init_ex (hctx, 0, 0, 0, 0); |
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HMAC_Update (hctx, ((unsigned char *) this) + sizeof (hmac_packet), |
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len - sizeof (hmac_packet)); |
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HMAC_Final (hctx, (unsigned char *) &hmac_digest, &xlen); |
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} |
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void |
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hmac_packet::hmac_set (crypto_ctx *ctx) |
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{ |
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hmac_gen (ctx); |
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memcpy (hmac, hmac_digest, HMACLENGTH); |
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} |
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282 |
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bool |
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hmac_packet::hmac_chk (crypto_ctx *ctx) |
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{ |
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hmac_gen (ctx); |
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287 |
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return !memcmp (hmac, hmac_digest, HMACLENGTH); |
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} |
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290 |
pcg |
1.6 |
void vpn_packet::set_hdr (ptype type_, unsigned int dst) |
291 |
pcg |
1.1 |
{ |
292 |
pcg |
1.6 |
type = type_; |
293 |
pcg |
1.1 |
|
294 |
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int src = THISNODE->id; |
295 |
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296 |
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src1 = src; |
297 |
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srcdst = ((src >> 8) << 4) | (dst >> 8); |
298 |
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dst1 = dst; |
299 |
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} |
300 |
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301 |
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#define MAXVPNDATA (MAX_MTU - 6 - 6) |
302 |
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#define DATAHDR (sizeof (u32) + RAND_SIZE) |
303 |
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304 |
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struct vpndata_packet:vpn_packet |
305 |
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{ |
306 |
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u8 data[MAXVPNDATA + DATAHDR]; // seqno |
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308 |
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void setup (connection *conn, int dst, u8 *d, u32 len, u32 seqno); |
309 |
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tap_packet *unpack (connection *conn, u32 &seqno); |
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private: |
311 |
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312 |
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const u32 data_hdr_size () const |
313 |
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{ |
314 |
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return sizeof (vpndata_packet) - sizeof (net_packet) - MAXVPNDATA - DATAHDR; |
315 |
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} |
316 |
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}; |
317 |
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318 |
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void |
319 |
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vpndata_packet::setup (connection *conn, int dst, u8 *d, u32 l, u32 seqno) |
320 |
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{ |
321 |
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EVP_CIPHER_CTX *cctx = &conn->octx->cctx; |
322 |
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int outl = 0, outl2; |
323 |
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ptype type = PT_DATA_UNCOMPRESSED; |
324 |
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325 |
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#if ENABLE_COMPRESSION |
326 |
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u8 cdata[MAX_MTU]; |
327 |
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u32 cl; |
328 |
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329 |
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cl = lzf_compress (d, l, cdata + 2, (l - 2) & ~7); |
330 |
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if (cl) |
331 |
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{ |
332 |
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type = PT_DATA_COMPRESSED; |
333 |
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d = cdata; |
334 |
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l = cl + 2; |
335 |
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336 |
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d[0] = cl >> 8; |
337 |
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d[1] = cl; |
338 |
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} |
339 |
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#endif |
340 |
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341 |
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EVP_EncryptInit_ex (cctx, 0, 0, 0, 0); |
342 |
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343 |
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struct { |
344 |
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#if RAND_SIZE |
345 |
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u8 rnd[RAND_SIZE]; |
346 |
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#endif |
347 |
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u32 seqno; |
348 |
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} datahdr; |
349 |
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350 |
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datahdr.seqno = ntohl (seqno); |
351 |
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#if RAND_SIZE |
352 |
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RAND_pseudo_bytes ((unsigned char *) datahdr.rnd, RAND_SIZE); |
353 |
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#endif |
354 |
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355 |
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EVP_EncryptUpdate (cctx, |
356 |
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(unsigned char *) data + outl, &outl2, |
357 |
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(unsigned char *) &datahdr, DATAHDR); |
358 |
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outl += outl2; |
359 |
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360 |
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EVP_EncryptUpdate (cctx, |
361 |
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(unsigned char *) data + outl, &outl2, |
362 |
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(unsigned char *) d, l); |
363 |
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outl += outl2; |
364 |
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365 |
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EVP_EncryptFinal_ex (cctx, (unsigned char *) data + outl, &outl2); |
366 |
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outl += outl2; |
367 |
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368 |
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len = outl + data_hdr_size (); |
369 |
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370 |
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set_hdr (type, dst); |
371 |
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372 |
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hmac_set (conn->octx); |
373 |
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} |
374 |
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|
375 |
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tap_packet * |
376 |
|
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vpndata_packet::unpack (connection *conn, u32 &seqno) |
377 |
|
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{ |
378 |
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EVP_CIPHER_CTX *cctx = &conn->ictx->cctx; |
379 |
|
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int outl = 0, outl2; |
380 |
|
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tap_packet *p = new tap_packet; |
381 |
|
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u8 *d; |
382 |
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u32 l = len - data_hdr_size (); |
383 |
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|
384 |
|
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EVP_DecryptInit_ex (cctx, 0, 0, 0, 0); |
385 |
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|
386 |
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#if ENABLE_COMPRESSION |
387 |
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u8 cdata[MAX_MTU]; |
388 |
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|
389 |
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if (type == PT_DATA_COMPRESSED) |
390 |
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d = cdata; |
391 |
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else |
392 |
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#endif |
393 |
|
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d = &(*p)[6 + 6 - DATAHDR]; |
394 |
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|
395 |
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/* this overwrites part of the src mac, but we fix that later */ |
396 |
|
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EVP_DecryptUpdate (cctx, |
397 |
|
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d, &outl2, |
398 |
|
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(unsigned char *)&data, len - data_hdr_size ()); |
399 |
|
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outl += outl2; |
400 |
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|
401 |
|
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EVP_DecryptFinal_ex (cctx, (unsigned char *)d + outl, &outl2); |
402 |
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outl += outl2; |
403 |
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|
404 |
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seqno = ntohl (*(u32 *)(d + RAND_SIZE)); |
405 |
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|
406 |
|
|
id2mac (dst () ? dst() : THISNODE->id, p->dst); |
407 |
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id2mac (src (), p->src); |
408 |
|
|
|
409 |
|
|
#if ENABLE_COMPRESSION |
410 |
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if (type == PT_DATA_COMPRESSED) |
411 |
|
|
{ |
412 |
|
|
u32 cl = (d[DATAHDR] << 8) | d[DATAHDR + 1]; |
413 |
|
|
|
414 |
|
|
p->len = lzf_decompress (d + DATAHDR + 2, cl < MAX_MTU ? cl : 0, |
415 |
|
|
&(*p)[6 + 6], MAX_MTU) |
416 |
|
|
+ 6 + 6; |
417 |
|
|
} |
418 |
|
|
else |
419 |
|
|
p->len = outl + (6 + 6 - DATAHDR); |
420 |
|
|
#endif |
421 |
|
|
|
422 |
|
|
return p; |
423 |
|
|
} |
424 |
|
|
|
425 |
|
|
struct ping_packet : vpn_packet |
426 |
|
|
{ |
427 |
|
|
void setup (int dst, ptype type) |
428 |
|
|
{ |
429 |
|
|
set_hdr (type, dst); |
430 |
|
|
len = sizeof (*this) - sizeof (net_packet); |
431 |
|
|
} |
432 |
|
|
}; |
433 |
|
|
|
434 |
|
|
struct config_packet : vpn_packet |
435 |
|
|
{ |
436 |
|
|
// actually, hmaclen cannot be checked because the hmac |
437 |
|
|
// field comes before this data, so peers with other |
438 |
|
|
// hmacs simply will not work. |
439 |
|
|
u8 prot_major, prot_minor, randsize, hmaclen; |
440 |
|
|
u8 flags, challengelen, pad2, pad3; |
441 |
|
|
u32 cipher_nid, digest_nid, hmac_nid; |
442 |
|
|
|
443 |
|
|
const u8 curflags () const |
444 |
|
|
{ |
445 |
|
|
return 0x80 |
446 |
|
|
| (ENABLE_COMPRESSION ? 0x01 : 0x00); |
447 |
|
|
} |
448 |
|
|
|
449 |
|
|
void setup (ptype type, int dst); |
450 |
|
|
bool chk_config () const; |
451 |
|
|
}; |
452 |
|
|
|
453 |
|
|
void config_packet::setup (ptype type, int dst) |
454 |
|
|
{ |
455 |
|
|
prot_major = PROTOCOL_MAJOR; |
456 |
|
|
prot_minor = PROTOCOL_MINOR; |
457 |
|
|
randsize = RAND_SIZE; |
458 |
|
|
hmaclen = HMACLENGTH; |
459 |
|
|
flags = curflags (); |
460 |
|
|
challengelen = sizeof (rsachallenge); |
461 |
|
|
|
462 |
|
|
cipher_nid = htonl (EVP_CIPHER_nid (CIPHER)); |
463 |
|
|
digest_nid = htonl (EVP_MD_type (RSA_HASH)); |
464 |
|
|
hmac_nid = htonl (EVP_MD_type (DIGEST)); |
465 |
|
|
|
466 |
|
|
len = sizeof (*this) - sizeof (net_packet); |
467 |
|
|
set_hdr (type, dst); |
468 |
|
|
} |
469 |
|
|
|
470 |
|
|
bool config_packet::chk_config () const |
471 |
|
|
{ |
472 |
|
|
return prot_major == PROTOCOL_MAJOR |
473 |
|
|
&& randsize == RAND_SIZE |
474 |
|
|
&& hmaclen == HMACLENGTH |
475 |
|
|
&& flags == curflags () |
476 |
|
|
&& challengelen == sizeof (rsachallenge) |
477 |
|
|
&& cipher_nid == htonl (EVP_CIPHER_nid (CIPHER)) |
478 |
|
|
&& digest_nid == htonl (EVP_MD_type (RSA_HASH)) |
479 |
|
|
&& hmac_nid == htonl (EVP_MD_type (DIGEST)); |
480 |
|
|
} |
481 |
|
|
|
482 |
|
|
struct auth_req_packet : config_packet |
483 |
|
|
{ |
484 |
|
|
char magic[8]; |
485 |
|
|
u8 initiate; // false if this is just an automatic reply |
486 |
|
|
u8 protocols; // supported protocols (will get patches on forward) |
487 |
|
|
u8 pad2, pad3; |
488 |
|
|
rsaid id; |
489 |
|
|
rsaencrdata encr; |
490 |
|
|
|
491 |
|
|
auth_req_packet (int dst, bool initiate_, u8 protocols_) |
492 |
|
|
{ |
493 |
|
|
config_packet::setup (PT_AUTH_REQ, dst); |
494 |
|
|
strncpy (magic, MAGIC, 8); |
495 |
|
|
initiate = !!initiate_; |
496 |
|
|
protocols = protocols_; |
497 |
|
|
|
498 |
|
|
len = sizeof (*this) - sizeof (net_packet); |
499 |
|
|
} |
500 |
|
|
}; |
501 |
|
|
|
502 |
|
|
struct auth_res_packet : config_packet |
503 |
|
|
{ |
504 |
|
|
rsaid id; |
505 |
|
|
u8 pad1, pad2, pad3; |
506 |
|
|
u8 response_len; // encrypted length |
507 |
|
|
rsaresponse response; |
508 |
|
|
|
509 |
|
|
auth_res_packet (int dst) |
510 |
|
|
{ |
511 |
|
|
config_packet::setup (PT_AUTH_RES, dst); |
512 |
|
|
|
513 |
|
|
len = sizeof (*this) - sizeof (net_packet); |
514 |
|
|
} |
515 |
|
|
}; |
516 |
|
|
|
517 |
|
|
struct connect_req_packet : vpn_packet |
518 |
|
|
{ |
519 |
|
|
u8 id, protocols; |
520 |
|
|
u8 pad1, pad2; |
521 |
|
|
|
522 |
|
|
connect_req_packet (int dst, int id_, u8 protocols_) |
523 |
|
|
: id(id_) |
524 |
|
|
, protocols(protocols_) |
525 |
|
|
{ |
526 |
|
|
set_hdr (PT_CONNECT_REQ, dst); |
527 |
|
|
len = sizeof (*this) - sizeof (net_packet); |
528 |
|
|
} |
529 |
|
|
}; |
530 |
|
|
|
531 |
|
|
struct connect_info_packet : vpn_packet |
532 |
|
|
{ |
533 |
|
|
u8 id, protocols; |
534 |
|
|
u8 pad1, pad2; |
535 |
|
|
sockinfo si; |
536 |
|
|
|
537 |
|
|
connect_info_packet (int dst, int id_, const sockinfo &si_, u8 protocols_) |
538 |
|
|
: id(id_) |
539 |
|
|
, protocols(protocols_) |
540 |
|
|
, si(si_) |
541 |
|
|
{ |
542 |
|
|
set_hdr (PT_CONNECT_INFO, dst); |
543 |
|
|
|
544 |
|
|
len = sizeof (*this) - sizeof (net_packet); |
545 |
|
|
} |
546 |
|
|
}; |
547 |
|
|
|
548 |
|
|
///////////////////////////////////////////////////////////////////////////// |
549 |
|
|
|
550 |
|
|
void |
551 |
pcg |
1.8 |
connection::reset_si () |
552 |
pcg |
1.1 |
{ |
553 |
pcg |
1.6 |
protocol = best_protocol (THISNODE->protocols & conf->protocols); |
554 |
|
|
|
555 |
|
|
// mask out protocols we cannot establish |
556 |
|
|
if (!conf->udp_port) protocol &= ~PROT_UDPv4; |
557 |
|
|
if (!conf->tcp_port) protocol &= ~PROT_TCPv4; |
558 |
|
|
|
559 |
|
|
si.set (conf, protocol); |
560 |
pcg |
1.1 |
} |
561 |
|
|
|
562 |
pcg |
1.8 |
// ensure sockinfo is valid, forward if necessary |
563 |
|
|
const sockinfo & |
564 |
|
|
connection::forward_si (const sockinfo &si) const |
565 |
|
|
{ |
566 |
|
|
if (!si.valid ()) |
567 |
|
|
{ |
568 |
|
|
connection *r = vpn->find_router (); |
569 |
|
|
|
570 |
|
|
if (r) |
571 |
|
|
{ |
572 |
|
|
slog (L_DEBUG, _("%s: no common protocol, trying indirectly through %s"), |
573 |
|
|
conf->nodename, r->conf->nodename); |
574 |
|
|
return r->si; |
575 |
|
|
} |
576 |
|
|
else |
577 |
|
|
slog (L_DEBUG, _("%s: node unreachable, no common protocol"), |
578 |
|
|
conf->nodename); |
579 |
|
|
} |
580 |
|
|
|
581 |
|
|
return si; |
582 |
|
|
} |
583 |
|
|
|
584 |
pcg |
1.1 |
void |
585 |
|
|
connection::send_ping (const sockinfo &si, u8 pong) |
586 |
|
|
{ |
587 |
|
|
ping_packet *pkt = new ping_packet; |
588 |
|
|
|
589 |
|
|
pkt->setup (conf->id, pong ? ping_packet::PT_PONG : ping_packet::PT_PING); |
590 |
pcg |
1.6 |
vpn->send_vpn_packet (pkt, si, IPTOS_LOWDELAY); |
591 |
pcg |
1.1 |
|
592 |
|
|
delete pkt; |
593 |
|
|
} |
594 |
|
|
|
595 |
|
|
void |
596 |
|
|
connection::send_reset (const sockinfo &si) |
597 |
|
|
{ |
598 |
|
|
if (reset_rate_limiter.can (si) && connectmode != conf_node::C_DISABLED) |
599 |
|
|
{ |
600 |
|
|
config_packet *pkt = new config_packet; |
601 |
|
|
|
602 |
|
|
pkt->setup (vpn_packet::PT_RESET, conf->id); |
603 |
pcg |
1.6 |
vpn->send_vpn_packet (pkt, si, IPTOS_MINCOST); |
604 |
pcg |
1.1 |
|
605 |
|
|
delete pkt; |
606 |
|
|
} |
607 |
|
|
} |
608 |
|
|
|
609 |
|
|
void |
610 |
|
|
connection::send_auth_request (const sockinfo &si, bool initiate) |
611 |
|
|
{ |
612 |
|
|
auth_req_packet *pkt = new auth_req_packet (conf->id, initiate, THISNODE->protocols); |
613 |
|
|
|
614 |
pcg |
1.6 |
rsachallenge chg; |
615 |
pcg |
1.1 |
|
616 |
pcg |
1.6 |
rsa_cache.gen (pkt->id, chg); |
617 |
pcg |
1.2 |
|
618 |
pcg |
1.6 |
if (0 > RSA_public_encrypt (sizeof chg, |
619 |
|
|
(unsigned char *)&chg, (unsigned char *)&pkt->encr, |
620 |
|
|
conf->rsa_key, RSA_PKCS1_OAEP_PADDING)) |
621 |
|
|
fatal ("RSA_public_encrypt error"); |
622 |
pcg |
1.1 |
|
623 |
pcg |
1.6 |
slog (L_TRACE, ">>%d PT_AUTH_REQ [%s]", conf->id, (const char *)si); |
624 |
pcg |
1.1 |
|
625 |
pcg |
1.8 |
vpn->send_vpn_packet (pkt, si, IPTOS_RELIABILITY | IPTOS_LOWDELAY); // rsa is very very costly |
626 |
pcg |
1.1 |
|
627 |
pcg |
1.6 |
delete pkt; |
628 |
pcg |
1.1 |
} |
629 |
|
|
|
630 |
|
|
void |
631 |
|
|
connection::send_auth_response (const sockinfo &si, const rsaid &id, const rsachallenge &chg) |
632 |
|
|
{ |
633 |
|
|
auth_res_packet *pkt = new auth_res_packet (conf->id); |
634 |
|
|
|
635 |
|
|
pkt->id = id; |
636 |
|
|
|
637 |
|
|
rsa_hash (id, chg, pkt->response); |
638 |
|
|
|
639 |
|
|
pkt->hmac_set (octx); |
640 |
|
|
|
641 |
|
|
slog (L_TRACE, ">>%d PT_AUTH_RES [%s]", conf->id, (const char *)si); |
642 |
|
|
|
643 |
pcg |
1.6 |
vpn->send_vpn_packet (pkt, si, IPTOS_RELIABILITY); // rsa is very very costly |
644 |
pcg |
1.1 |
|
645 |
|
|
delete pkt; |
646 |
|
|
} |
647 |
|
|
|
648 |
|
|
void |
649 |
|
|
connection::send_connect_info (int rid, const sockinfo &rsi, u8 rprotocols) |
650 |
|
|
{ |
651 |
|
|
slog (L_TRACE, ">>%d PT_CONNECT_INFO(%d,%s)\n", |
652 |
|
|
conf->id, rid, (const char *)rsi); |
653 |
|
|
|
654 |
|
|
connect_info_packet *r = new connect_info_packet (conf->id, rid, rsi, rprotocols); |
655 |
|
|
|
656 |
|
|
r->hmac_set (octx); |
657 |
pcg |
1.6 |
vpn->send_vpn_packet (r, si); |
658 |
pcg |
1.1 |
|
659 |
|
|
delete r; |
660 |
|
|
} |
661 |
|
|
|
662 |
|
|
void |
663 |
pcg |
1.4 |
connection::establish_connection_cb (time_watcher &w) |
664 |
pcg |
1.1 |
{ |
665 |
|
|
if (ictx || conf == THISNODE |
666 |
|
|
|| connectmode == conf_node::C_NEVER |
667 |
|
|
|| connectmode == conf_node::C_DISABLED) |
668 |
pcg |
1.4 |
w.at = TSTAMP_CANCEL; |
669 |
|
|
else if (w.at <= NOW) |
670 |
pcg |
1.1 |
{ |
671 |
|
|
double retry_int = double (retry_cnt & 3 ? (retry_cnt & 3) : 1 << (retry_cnt >> 2)) * 0.6; |
672 |
|
|
|
673 |
|
|
if (retry_int < 3600 * 8) |
674 |
|
|
retry_cnt++; |
675 |
|
|
|
676 |
pcg |
1.4 |
w.at = NOW + retry_int; |
677 |
pcg |
1.1 |
|
678 |
pcg |
1.8 |
reset_si (); |
679 |
|
|
|
680 |
|
|
if (si.prot && !si.host) |
681 |
|
|
vpn->connect_request (conf->id); |
682 |
|
|
else |
683 |
pcg |
1.1 |
{ |
684 |
pcg |
1.8 |
const sockinfo &dsi = forward_si (si); |
685 |
pcg |
1.6 |
|
686 |
pcg |
1.8 |
if (dsi.valid () && auth_rate_limiter.can (dsi)) |
687 |
|
|
{ |
688 |
|
|
if (retry_cnt < 4) |
689 |
|
|
send_auth_request (dsi, true); |
690 |
|
|
else |
691 |
|
|
send_ping (dsi, 0); |
692 |
|
|
} |
693 |
pcg |
1.1 |
} |
694 |
|
|
} |
695 |
|
|
} |
696 |
|
|
|
697 |
|
|
void |
698 |
|
|
connection::reset_connection () |
699 |
|
|
{ |
700 |
|
|
if (ictx && octx) |
701 |
|
|
{ |
702 |
|
|
slog (L_INFO, _("%s(%s): connection lost"), |
703 |
|
|
conf->nodename, (const char *)si); |
704 |
|
|
|
705 |
|
|
if (::conf.script_node_down) |
706 |
|
|
run_script (run_script_cb (this, &connection::script_node_down), false); |
707 |
|
|
} |
708 |
|
|
|
709 |
|
|
delete ictx; ictx = 0; |
710 |
|
|
delete octx; octx = 0; |
711 |
|
|
|
712 |
|
|
si.host= 0; |
713 |
|
|
|
714 |
|
|
last_activity = 0; |
715 |
|
|
retry_cnt = 0; |
716 |
|
|
|
717 |
|
|
rekey.reset (); |
718 |
|
|
keepalive.reset (); |
719 |
|
|
establish_connection.reset (); |
720 |
|
|
} |
721 |
|
|
|
722 |
|
|
void |
723 |
|
|
connection::shutdown () |
724 |
|
|
{ |
725 |
|
|
if (ictx && octx) |
726 |
|
|
send_reset (si); |
727 |
|
|
|
728 |
|
|
reset_connection (); |
729 |
|
|
} |
730 |
|
|
|
731 |
|
|
void |
732 |
pcg |
1.4 |
connection::rekey_cb (time_watcher &w) |
733 |
pcg |
1.1 |
{ |
734 |
pcg |
1.4 |
w.at = TSTAMP_CANCEL; |
735 |
pcg |
1.1 |
|
736 |
|
|
reset_connection (); |
737 |
|
|
establish_connection (); |
738 |
|
|
} |
739 |
|
|
|
740 |
|
|
void |
741 |
|
|
connection::send_data_packet (tap_packet *pkt, bool broadcast) |
742 |
|
|
{ |
743 |
|
|
vpndata_packet *p = new vpndata_packet; |
744 |
|
|
int tos = 0; |
745 |
|
|
|
746 |
|
|
if (conf->inherit_tos |
747 |
|
|
&& (*pkt)[12] == 0x08 && (*pkt)[13] == 0x00 // IP |
748 |
|
|
&& ((*pkt)[14] & 0xf0) == 0x40) // IPv4 |
749 |
|
|
tos = (*pkt)[15] & IPTOS_TOS_MASK; |
750 |
|
|
|
751 |
|
|
p->setup (this, broadcast ? 0 : conf->id, &((*pkt)[6 + 6]), pkt->len - 6 - 6, ++oseqno); // skip 2 macs |
752 |
pcg |
1.6 |
vpn->send_vpn_packet (p, si, tos); |
753 |
pcg |
1.1 |
|
754 |
|
|
delete p; |
755 |
|
|
|
756 |
|
|
if (oseqno > MAX_SEQNO) |
757 |
|
|
rekey (); |
758 |
|
|
} |
759 |
|
|
|
760 |
|
|
void |
761 |
|
|
connection::inject_data_packet (tap_packet *pkt, bool broadcast) |
762 |
|
|
{ |
763 |
|
|
if (ictx && octx) |
764 |
|
|
send_data_packet (pkt, broadcast); |
765 |
|
|
else |
766 |
|
|
{ |
767 |
|
|
if (!broadcast)//DDDD |
768 |
|
|
queue.put (new tap_packet (*pkt)); |
769 |
|
|
|
770 |
|
|
establish_connection (); |
771 |
|
|
} |
772 |
|
|
} |
773 |
|
|
|
774 |
pcg |
1.8 |
void connection::inject_vpn_packet (vpn_packet *pkt, int tos) |
775 |
|
|
{ |
776 |
|
|
if (ictx && octx) |
777 |
|
|
vpn->send_vpn_packet (pkt, si, tos); |
778 |
|
|
else |
779 |
|
|
establish_connection (); |
780 |
|
|
} |
781 |
|
|
|
782 |
pcg |
1.1 |
void |
783 |
|
|
connection::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
784 |
|
|
{ |
785 |
|
|
last_activity = NOW; |
786 |
|
|
|
787 |
|
|
slog (L_NOISE, "<<%d received packet type %d from %d to %d", |
788 |
|
|
conf->id, pkt->typ (), pkt->src (), pkt->dst ()); |
789 |
|
|
|
790 |
|
|
switch (pkt->typ ()) |
791 |
|
|
{ |
792 |
pcg |
1.3 |
case vpn_packet::PT_PING: |
793 |
|
|
// we send pings instead of auth packets after some retries, |
794 |
|
|
// so reset the retry counter and establish a connection |
795 |
|
|
// when we receive a ping. |
796 |
|
|
if (!ictx) |
797 |
|
|
{ |
798 |
|
|
if (auth_rate_limiter.can (rsi)) |
799 |
|
|
send_auth_request (rsi, true); |
800 |
|
|
} |
801 |
|
|
else |
802 |
|
|
send_ping (rsi, 1); // pong |
803 |
|
|
|
804 |
|
|
break; |
805 |
|
|
|
806 |
|
|
case vpn_packet::PT_PONG: |
807 |
|
|
break; |
808 |
|
|
|
809 |
|
|
case vpn_packet::PT_RESET: |
810 |
pcg |
1.1 |
{ |
811 |
pcg |
1.3 |
reset_connection (); |
812 |
|
|
|
813 |
|
|
config_packet *p = (config_packet *) pkt; |
814 |
|
|
|
815 |
|
|
if (!p->chk_config ()) |
816 |
|
|
{ |
817 |
|
|
slog (L_WARN, _("%s(%s): protocol mismatch, disabling node"), |
818 |
|
|
conf->nodename, (const char *)rsi); |
819 |
|
|
connectmode = conf_node::C_DISABLED; |
820 |
|
|
} |
821 |
|
|
else if (connectmode == conf_node::C_ALWAYS) |
822 |
|
|
establish_connection (); |
823 |
pcg |
1.1 |
} |
824 |
pcg |
1.3 |
break; |
825 |
|
|
|
826 |
|
|
case vpn_packet::PT_AUTH_REQ: |
827 |
|
|
if (auth_rate_limiter.can (rsi)) |
828 |
|
|
{ |
829 |
|
|
auth_req_packet *p = (auth_req_packet *) pkt; |
830 |
|
|
|
831 |
|
|
slog (L_TRACE, "<<%d PT_AUTH_REQ(%d)", conf->id, p->initiate); |
832 |
pcg |
1.1 |
|
833 |
pcg |
1.3 |
if (p->chk_config () && !strncmp (p->magic, MAGIC, 8)) |
834 |
|
|
{ |
835 |
|
|
if (p->prot_minor != PROTOCOL_MINOR) |
836 |
|
|
slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."), |
837 |
|
|
conf->nodename, (const char *)rsi, |
838 |
|
|
PROTOCOL_MINOR, conf->nodename, p->prot_minor); |
839 |
|
|
|
840 |
|
|
if (p->initiate) |
841 |
|
|
send_auth_request (rsi, false); |
842 |
|
|
|
843 |
|
|
rsachallenge k; |
844 |
|
|
|
845 |
|
|
if (0 > RSA_private_decrypt (sizeof (p->encr), |
846 |
|
|
(unsigned char *)&p->encr, (unsigned char *)&k, |
847 |
|
|
::conf.rsa_key, RSA_PKCS1_OAEP_PADDING)) |
848 |
|
|
slog (L_ERR, _("%s(%s): challenge illegal or corrupted"), |
849 |
|
|
conf->nodename, (const char *)rsi); |
850 |
|
|
else |
851 |
|
|
{ |
852 |
|
|
retry_cnt = 0; |
853 |
pcg |
1.6 |
establish_connection.start (NOW + 8); //? ;) |
854 |
pcg |
1.3 |
keepalive.reset (); |
855 |
|
|
rekey.reset (); |
856 |
pcg |
1.1 |
|
857 |
pcg |
1.3 |
delete ictx; |
858 |
|
|
ictx = 0; |
859 |
pcg |
1.1 |
|
860 |
pcg |
1.3 |
delete octx; |
861 |
pcg |
1.1 |
|
862 |
pcg |
1.3 |
octx = new crypto_ctx (k, 1); |
863 |
|
|
oseqno = ntohl (*(u32 *)&k[CHG_SEQNO]) & 0x7fffffff; |
864 |
pcg |
1.1 |
|
865 |
pcg |
1.3 |
conf->protocols = p->protocols; |
866 |
|
|
send_auth_response (rsi, p->id, k); |
867 |
|
|
|
868 |
|
|
break; |
869 |
|
|
} |
870 |
|
|
} |
871 |
|
|
|
872 |
|
|
send_reset (rsi); |
873 |
pcg |
1.1 |
} |
874 |
|
|
|
875 |
pcg |
1.3 |
break; |
876 |
|
|
|
877 |
|
|
case vpn_packet::PT_AUTH_RES: |
878 |
pcg |
1.1 |
{ |
879 |
pcg |
1.3 |
auth_res_packet *p = (auth_res_packet *) pkt; |
880 |
pcg |
1.1 |
|
881 |
pcg |
1.3 |
slog (L_TRACE, "<<%d PT_AUTH_RES", conf->id); |
882 |
pcg |
1.1 |
|
883 |
pcg |
1.3 |
if (p->chk_config ()) |
884 |
pcg |
1.1 |
{ |
885 |
|
|
if (p->prot_minor != PROTOCOL_MINOR) |
886 |
|
|
slog (L_INFO, _("%s(%s): protocol minor version mismatch: ours is %d, %s's is %d."), |
887 |
|
|
conf->nodename, (const char *)rsi, |
888 |
|
|
PROTOCOL_MINOR, conf->nodename, p->prot_minor); |
889 |
|
|
|
890 |
pcg |
1.3 |
rsachallenge chg; |
891 |
pcg |
1.1 |
|
892 |
pcg |
1.3 |
if (!rsa_cache.find (p->id, chg)) |
893 |
|
|
slog (L_ERR, _("%s(%s): unrequested auth response"), |
894 |
pcg |
1.1 |
conf->nodename, (const char *)rsi); |
895 |
|
|
else |
896 |
|
|
{ |
897 |
pcg |
1.3 |
crypto_ctx *cctx = new crypto_ctx (chg, 0); |
898 |
|
|
|
899 |
|
|
if (!p->hmac_chk (cctx)) |
900 |
|
|
slog (L_ERR, _("%s(%s): hmac authentication error on auth response, received invalid packet\n" |
901 |
|
|
"could be an attack, or just corruption or an synchronization error"), |
902 |
|
|
conf->nodename, (const char *)rsi); |
903 |
|
|
else |
904 |
|
|
{ |
905 |
|
|
rsaresponse h; |
906 |
|
|
|
907 |
|
|
rsa_hash (p->id, chg, h); |
908 |
|
|
|
909 |
|
|
if (!memcmp ((u8 *)&h, (u8 *)p->response, sizeof h)) |
910 |
|
|
{ |
911 |
|
|
prot_minor = p->prot_minor; |
912 |
|
|
|
913 |
|
|
delete ictx; ictx = cctx; |
914 |
|
|
|
915 |
|
|
iseqno.reset (ntohl (*(u32 *)&chg[CHG_SEQNO]) & 0x7fffffff); // at least 2**31 sequence numbers are valid |
916 |
|
|
|
917 |
|
|
si = rsi; |
918 |
pcg |
1.7 |
protocol = rsi.prot; |
919 |
pcg |
1.3 |
|
920 |
pcg |
1.6 |
rekey.start (NOW + ::conf.rekey); |
921 |
|
|
keepalive.start (NOW + ::conf.keepalive); |
922 |
pcg |
1.3 |
|
923 |
|
|
// send queued packets |
924 |
|
|
while (tap_packet *p = queue.get ()) |
925 |
|
|
{ |
926 |
|
|
send_data_packet (p); |
927 |
|
|
delete p; |
928 |
|
|
} |
929 |
pcg |
1.1 |
|
930 |
pcg |
1.3 |
connectmode = conf->connectmode; |
931 |
pcg |
1.1 |
|
932 |
pcg |
1.7 |
slog (L_INFO, _("%s(%s): connection established, protocol version %d.%d"), |
933 |
pcg |
1.3 |
conf->nodename, (const char *)rsi, |
934 |
|
|
p->prot_major, p->prot_minor); |
935 |
pcg |
1.1 |
|
936 |
pcg |
1.3 |
if (::conf.script_node_up) |
937 |
|
|
run_script (run_script_cb (this, &connection::script_node_up), false); |
938 |
pcg |
1.1 |
|
939 |
pcg |
1.3 |
break; |
940 |
|
|
} |
941 |
|
|
else |
942 |
|
|
slog (L_ERR, _("%s(%s): sent and received challenge do not match"), |
943 |
|
|
conf->nodename, (const char *)rsi); |
944 |
|
|
} |
945 |
pcg |
1.1 |
|
946 |
pcg |
1.3 |
delete cctx; |
947 |
pcg |
1.1 |
} |
948 |
|
|
} |
949 |
|
|
} |
950 |
|
|
|
951 |
pcg |
1.3 |
send_reset (rsi); |
952 |
|
|
break; |
953 |
pcg |
1.1 |
|
954 |
pcg |
1.3 |
case vpn_packet::PT_DATA_COMPRESSED: |
955 |
|
|
#if !ENABLE_COMPRESSION |
956 |
|
|
send_reset (rsi); |
957 |
|
|
break; |
958 |
|
|
#endif |
959 |
pcg |
1.1 |
|
960 |
pcg |
1.3 |
case vpn_packet::PT_DATA_UNCOMPRESSED: |
961 |
pcg |
1.1 |
|
962 |
pcg |
1.3 |
if (ictx && octx) |
963 |
pcg |
1.1 |
{ |
964 |
pcg |
1.3 |
vpndata_packet *p = (vpndata_packet *)pkt; |
965 |
pcg |
1.1 |
|
966 |
pcg |
1.3 |
if (rsi == si) |
967 |
pcg |
1.1 |
{ |
968 |
pcg |
1.3 |
if (!p->hmac_chk (ictx)) |
969 |
|
|
slog (L_ERR, _("%s(%s): hmac authentication error, received invalid packet\n" |
970 |
pcg |
1.1 |
"could be an attack, or just corruption or an synchronization error"), |
971 |
|
|
conf->nodename, (const char *)rsi); |
972 |
|
|
else |
973 |
|
|
{ |
974 |
pcg |
1.3 |
u32 seqno; |
975 |
|
|
tap_packet *d = p->unpack (this, seqno); |
976 |
pcg |
1.1 |
|
977 |
pcg |
1.3 |
if (iseqno.recv_ok (seqno)) |
978 |
pcg |
1.1 |
{ |
979 |
pcg |
1.3 |
vpn->tap->send (d); |
980 |
pcg |
1.1 |
|
981 |
pcg |
1.3 |
if (p->dst () == 0) // re-broadcast |
982 |
|
|
for (vpn::conns_vector::iterator i = vpn->conns.begin (); i != vpn->conns.end (); ++i) |
983 |
|
|
{ |
984 |
|
|
connection *c = *i; |
985 |
|
|
|
986 |
|
|
if (c->conf != THISNODE && c->conf != conf) |
987 |
|
|
c->inject_data_packet (d); |
988 |
|
|
} |
989 |
pcg |
1.1 |
|
990 |
pcg |
1.3 |
delete d; |
991 |
pcg |
1.1 |
|
992 |
|
|
break; |
993 |
|
|
} |
994 |
|
|
} |
995 |
|
|
} |
996 |
pcg |
1.3 |
else |
997 |
|
|
slog (L_ERR, _("received data packet from unknown source %s"), (const char *)rsi); |
998 |
pcg |
1.1 |
} |
999 |
|
|
|
1000 |
pcg |
1.3 |
send_reset (rsi); |
1001 |
|
|
break; |
1002 |
pcg |
1.1 |
|
1003 |
pcg |
1.3 |
case vpn_packet::PT_CONNECT_REQ: |
1004 |
|
|
if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
1005 |
|
|
{ |
1006 |
|
|
connect_req_packet *p = (connect_req_packet *) pkt; |
1007 |
pcg |
1.1 |
|
1008 |
pcg |
1.3 |
assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything |
1009 |
pcg |
1.7 |
connection *c = vpn->conns[p->id - 1]; |
1010 |
pcg |
1.3 |
conf->protocols = p->protocols; |
1011 |
pcg |
1.1 |
|
1012 |
pcg |
1.3 |
slog (L_TRACE, "<<%d PT_CONNECT_REQ(%d) [%d]\n", |
1013 |
|
|
conf->id, p->id, c->ictx && c->octx); |
1014 |
pcg |
1.1 |
|
1015 |
pcg |
1.3 |
if (c->ictx && c->octx) |
1016 |
|
|
{ |
1017 |
|
|
// send connect_info packets to both sides, in case one is |
1018 |
|
|
// behind a nat firewall (or both ;) |
1019 |
|
|
c->send_connect_info (conf->id, si, conf->protocols); |
1020 |
|
|
send_connect_info (c->conf->id, c->si, c->conf->protocols); |
1021 |
|
|
} |
1022 |
|
|
} |
1023 |
pcg |
1.1 |
|
1024 |
pcg |
1.3 |
break; |
1025 |
pcg |
1.1 |
|
1026 |
pcg |
1.3 |
case vpn_packet::PT_CONNECT_INFO: |
1027 |
|
|
if (ictx && octx && rsi == si && pkt->hmac_chk (ictx)) |
1028 |
|
|
{ |
1029 |
|
|
connect_info_packet *p = (connect_info_packet *) pkt; |
1030 |
pcg |
1.1 |
|
1031 |
pcg |
1.3 |
assert (p->id > 0 && p->id <= vpn->conns.size ()); // hmac-auth does not mean we accept anything |
1032 |
pcg |
1.7 |
|
1033 |
pcg |
1.3 |
connection *c = vpn->conns[p->id - 1]; |
1034 |
pcg |
1.1 |
|
1035 |
pcg |
1.7 |
c->conf->protocols = p->protocols; |
1036 |
|
|
protocol = best_protocol (c->conf->protocols & THISNODE->protocols & p->si.supported_protocols (c->conf)); |
1037 |
|
|
p->si.upgrade_protocol (protocol, c->conf); |
1038 |
|
|
|
1039 |
pcg |
1.3 |
slog (L_TRACE, "<<%d PT_CONNECT_INFO(%d,%s) (%d)", |
1040 |
|
|
conf->id, p->id, (const char *)p->si, !c->ictx && !c->octx); |
1041 |
pcg |
1.1 |
|
1042 |
pcg |
1.8 |
const sockinfo &dsi = forward_si (p->si); |
1043 |
|
|
|
1044 |
|
|
if (dsi.valid ()) |
1045 |
|
|
c->send_auth_request (dsi, true); |
1046 |
pcg |
1.3 |
} |
1047 |
pcg |
1.1 |
|
1048 |
pcg |
1.3 |
break; |
1049 |
pcg |
1.1 |
|
1050 |
pcg |
1.3 |
default: |
1051 |
|
|
send_reset (rsi); |
1052 |
|
|
break; |
1053 |
pcg |
1.1 |
} |
1054 |
|
|
} |
1055 |
|
|
|
1056 |
pcg |
1.4 |
void connection::keepalive_cb (time_watcher &w) |
1057 |
pcg |
1.1 |
{ |
1058 |
|
|
if (NOW >= last_activity + ::conf.keepalive + 30) |
1059 |
|
|
{ |
1060 |
|
|
reset_connection (); |
1061 |
|
|
establish_connection (); |
1062 |
|
|
} |
1063 |
|
|
else if (NOW < last_activity + ::conf.keepalive) |
1064 |
pcg |
1.4 |
w.at = last_activity + ::conf.keepalive; |
1065 |
pcg |
1.1 |
else if (conf->connectmode != conf_node::C_ONDEMAND |
1066 |
|
|
|| THISNODE->connectmode != conf_node::C_ONDEMAND) |
1067 |
|
|
{ |
1068 |
|
|
send_ping (si); |
1069 |
pcg |
1.4 |
w.at = NOW + 5; |
1070 |
pcg |
1.1 |
} |
1071 |
|
|
else |
1072 |
|
|
reset_connection (); |
1073 |
|
|
} |
1074 |
|
|
|
1075 |
|
|
void connection::connect_request (int id) |
1076 |
|
|
{ |
1077 |
|
|
connect_req_packet *p = new connect_req_packet (conf->id, id, conf->protocols); |
1078 |
|
|
|
1079 |
|
|
slog (L_TRACE, ">>%d PT_CONNECT_REQ(%d)", conf->id, id); |
1080 |
|
|
p->hmac_set (octx); |
1081 |
pcg |
1.6 |
vpn->send_vpn_packet (p, si); |
1082 |
pcg |
1.1 |
|
1083 |
|
|
delete p; |
1084 |
|
|
} |
1085 |
|
|
|
1086 |
|
|
void connection::script_node () |
1087 |
|
|
{ |
1088 |
pcg |
1.3 |
vpn->script_if_up (); |
1089 |
pcg |
1.1 |
|
1090 |
|
|
char *env; |
1091 |
|
|
asprintf (&env, "DESTID=%d", conf->id); putenv (env); |
1092 |
|
|
asprintf (&env, "DESTNODE=%s", conf->nodename); putenv (env); |
1093 |
|
|
asprintf (&env, "DESTIP=%s", si.ntoa ()); putenv (env); |
1094 |
|
|
asprintf (&env, "DESTPORT=%d", ntohs (si.port)); putenv (env); |
1095 |
|
|
} |
1096 |
|
|
|
1097 |
pcg |
1.3 |
const char *connection::script_node_up () |
1098 |
pcg |
1.1 |
{ |
1099 |
|
|
script_node (); |
1100 |
|
|
|
1101 |
|
|
putenv ("STATE=up"); |
1102 |
|
|
|
1103 |
|
|
return ::conf.script_node_up ? ::conf.script_node_up : "node-up"; |
1104 |
|
|
} |
1105 |
|
|
|
1106 |
pcg |
1.3 |
const char *connection::script_node_down () |
1107 |
pcg |
1.1 |
{ |
1108 |
|
|
script_node (); |
1109 |
|
|
|
1110 |
|
|
putenv ("STATE=down"); |
1111 |
|
|
|
1112 |
|
|
return ::conf.script_node_up ? ::conf.script_node_down : "node-down"; |
1113 |
|
|
} |
1114 |
|
|
|
1115 |
|
|
connection::connection(struct vpn *vpn_) |
1116 |
|
|
: vpn(vpn_) |
1117 |
|
|
, rekey (this, &connection::rekey_cb) |
1118 |
|
|
, keepalive (this, &connection::keepalive_cb) |
1119 |
|
|
, establish_connection (this, &connection::establish_connection_cb) |
1120 |
|
|
{ |
1121 |
|
|
octx = ictx = 0; |
1122 |
|
|
retry_cnt = 0; |
1123 |
|
|
|
1124 |
|
|
connectmode = conf_node::C_ALWAYS; // initial setting |
1125 |
|
|
reset_connection (); |
1126 |
|
|
} |
1127 |
|
|
|
1128 |
|
|
connection::~connection () |
1129 |
|
|
{ |
1130 |
|
|
shutdown (); |
1131 |
|
|
} |
1132 |
|
|
|
1133 |
|
|
void connection_init () |
1134 |
|
|
{ |
1135 |
|
|
auth_rate_limiter.clear (); |
1136 |
|
|
reset_rate_limiter.clear (); |
1137 |
|
|
} |
1138 |
|
|
|