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/* |
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vpn.C -- handle the protocol, encryption, handshaking etc. |
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|
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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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|
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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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|
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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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|
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#include "config.h" |
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|
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#include <list> |
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|
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#include <cstdlib> |
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#include <cstring> |
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#include <cstdio> |
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|
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#include <sys/types.h> |
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#include <sys/socket.h> |
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#include <sys/poll.h> |
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#include <sys/wait.h> |
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#include <errno.h> |
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#include <time.h> |
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#include <unistd.h> |
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#include <arpa/inet.h> |
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#include <netinet/in.h> |
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#include <netinet/icmp.h> |
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|
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#include "pidfile.h" |
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|
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#include "connection.h" |
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#include "util.h" |
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#include "vpn.h" |
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|
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///////////////////////////////////////////////////////////////////////////// |
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|
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const char *vpn::script_if_up () |
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{ |
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// the tunnel device mtu should be the physical mtu - overhead |
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// the tricky part is rounding to the cipher key blocksize |
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int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD; |
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mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion |
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mtu -= mtu % EVP_CIPHER_block_size (CIPHER); // round |
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mtu -= ETH_OVERHEAD - 6 - 6; // and get interface mtu again |
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|
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char *env; |
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asprintf (&env, "CONFBASE=%s", confbase); |
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putenv (env); |
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asprintf (&env, "NODENAME=%s", THISNODE->nodename); |
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putenv (env); |
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asprintf (&env, "NODEID=%d", THISNODE->id); |
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putenv (env); |
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asprintf (&env, "IFNAME=%s", tap->interface ()); |
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putenv (env); |
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asprintf (&env, "MTU=%d", mtu); |
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putenv (env); |
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asprintf (&env, "MAC=%02x:%02x:%02x:%02x:%02x:%02x", |
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0xfe, 0xfd, 0x80, 0x00, THISNODE->id >> 8, |
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THISNODE->id & 0xff); |
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putenv (env); |
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|
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return ::conf.script_if_up ? ::conf.script_if_up : "if-up"; |
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} |
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|
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int |
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vpn::setup () |
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{ |
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ipv4_fd = -1; |
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|
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if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto) |
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{ |
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ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto); |
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|
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if (ipv4_fd < 0) |
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return -1; |
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|
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#ifdef IP_MTU_DISCOVER |
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// this I really consider a linux bug. I am neither connected |
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// nor do I fragment myself. Linux still sets DF and doesn't |
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// fragment for me sometimes. |
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{ |
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int oval = IP_PMTUDISC_DONT; |
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setsockopt (ipv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
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} |
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#endif |
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|
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sockinfo si (THISNODE, PROT_IPv4); |
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|
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if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) |
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{ |
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slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno)); |
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exit (1); |
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} |
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|
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ipv4_ev_watcher.start (ipv4_fd, POLLIN); |
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} |
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|
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udpv4_fd = -1; |
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|
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if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
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{ |
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udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
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|
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if (udpv4_fd < 0) |
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return -1; |
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|
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// standard daemon practise... |
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{ |
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int oval = 1; |
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setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
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} |
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|
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#ifdef IP_MTU_DISCOVER |
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// this I really consider a linux bug. I am neither connected |
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// nor do I fragment myself. Linux still sets DF and doesn't |
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// fragment for me sometimes. |
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{ |
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int oval = IP_PMTUDISC_DONT; |
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setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
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} |
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#endif |
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|
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sockinfo si (THISNODE, PROT_UDPv4); |
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|
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if (bind (udpv4_fd, si.sav4 (), si.salenv4 ())) |
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{ |
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slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno)); |
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exit (1); |
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} |
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|
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udpv4_ev_watcher.start (udpv4_fd, POLLIN); |
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} |
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|
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icmpv4_fd = -1; |
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|
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#if ENABLE_ICMP |
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if (THISNODE->protocols & PROT_ICMPv4) |
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{ |
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icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP); |
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|
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if (icmpv4_fd < 0) |
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return -1; |
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|
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#ifdef ICMP_FILTER |
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{ |
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icmp_filter oval; |
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oval.data = 0xffffffff; |
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if (::conf.icmp_type < 32) |
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oval.data &= ~(1 << ::conf.icmp_type); |
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|
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setsockopt (icmpv4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval); |
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} |
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#endif |
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|
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#ifdef IP_MTU_DISCOVER |
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// this I really consider a linux bug. I am neither connected |
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// nor do I fragment myself. Linux still sets DF and doesn't |
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// fragment for me sometimes. |
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{ |
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int oval = IP_PMTUDISC_DONT; |
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setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
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} |
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#endif |
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|
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sockinfo si (THISNODE, PROT_ICMPv4); |
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|
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if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ())) |
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{ |
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slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno)); |
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exit (1); |
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} |
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|
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icmpv4_ev_watcher.start (icmpv4_fd, POLLIN); |
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} |
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#endif |
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|
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tcpv4_fd = -1; |
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|
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#if ENABLE_TCP |
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if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port) |
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{ |
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tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP); |
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|
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if (tcpv4_fd < 0) |
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return -1; |
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|
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// standard daemon practise... |
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{ |
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int oval = 1; |
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setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
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} |
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|
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sockinfo si (THISNODE, PROT_TCPv4); |
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|
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if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ())) |
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{ |
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slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
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exit (1); |
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} |
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|
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if (listen (tcpv4_fd, 5)) |
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{ |
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slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno)); |
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exit (1); |
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} |
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|
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tcpv4_ev_watcher.start (tcpv4_fd, POLLIN); |
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} |
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#endif |
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|
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tap = new tap_device (); |
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if (!tap) //D this, of course, never catches |
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{ |
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slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); |
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exit (1); |
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} |
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|
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run_script (run_script_cb (this, &vpn::script_if_up), true); |
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|
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tap_ev_watcher.start (tap->fd, POLLIN); |
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|
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reconnect_all (); |
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|
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return 0; |
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} |
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|
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// send a vpn packet out to other hosts |
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bool |
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vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
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{ |
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switch (si.prot) |
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{ |
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case PROT_IPv4: |
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return send_ipv4_packet (pkt, si, tos); |
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|
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case PROT_UDPv4: |
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return send_udpv4_packet (pkt, si, tos); |
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|
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#if ENABLE_TCP |
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case PROT_TCPv4: |
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return send_tcpv4_packet (pkt, si, tos); |
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#endif |
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|
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#if ENABLE_ICMP |
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case PROT_ICMPv4: |
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return send_icmpv4_packet (pkt, si, tos); |
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#endif |
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|
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default: |
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slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si); |
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return false; |
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} |
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} |
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|
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bool |
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vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
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{ |
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setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
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sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
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|
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return true; |
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} |
272 |
|
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static u16 |
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ipv4_checksum (u16 *data, unsigned int len) |
275 |
{ |
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// use 32 bit accumulator and fold back carry bits at the end |
277 |
u32 sum = 0; |
278 |
|
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while (len > 1) |
280 |
{ |
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sum += *data++; |
282 |
len -= 2; |
283 |
} |
284 |
|
285 |
// odd byte left? |
286 |
if (len) |
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sum += *(u8 *)data; |
288 |
|
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// add back carry bits |
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sum = (sum >> 16) + (sum & 0xffff); // lo += hi |
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sum += (sum >> 16); // carry |
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|
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return ~sum; |
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} |
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|
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bool |
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vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
298 |
{ |
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setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
300 |
|
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pkt->unshift_hdr (4); |
302 |
|
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icmphdr *hdr = (icmphdr *)&((*pkt)[0]); |
304 |
hdr->type = ::conf.icmp_type; |
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hdr->code = 255; |
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hdr->checksum = 0; |
307 |
hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len); |
308 |
|
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sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
310 |
|
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return true; |
312 |
} |
313 |
|
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bool |
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vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
316 |
{ |
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setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); |
318 |
sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
319 |
|
320 |
return true; |
321 |
} |
322 |
|
323 |
void |
324 |
vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) |
325 |
{ |
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unsigned int src = pkt->src (); |
327 |
unsigned int dst = pkt->dst (); |
328 |
|
329 |
slog (L_NOISE, _("<<?/%s received possible vpn packet type %d from %d to %d, length %d"), |
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(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len); |
331 |
|
332 |
if (src == 0 || src > conns.size () |
333 |
|| dst > conns.size () |
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|| pkt->typ () >= vpn_packet::PT_MAX) |
335 |
slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"), |
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(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
337 |
else if (dst > conns.size ()) |
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slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"), |
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(const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
340 |
else |
341 |
{ |
342 |
connection *c = conns[src - 1]; |
343 |
|
344 |
if (dst == 0 && !THISNODE->routerprio) |
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slog (L_WARN, _("%s(%s): received broadcast, but we are no router"), |
346 |
c->conf->nodename, (const char *)rsi); |
347 |
else if (dst != 0 && dst != THISNODE->id) |
348 |
{ |
349 |
if (THISNODE->routerprio) |
350 |
// the tos setting gets lost here. who cares. |
351 |
conns[dst - 1]->inject_vpn_packet (pkt); |
352 |
else |
353 |
slog (L_WARN, |
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_("%s(%s): forwarding request (=> %s), but we are no router"), |
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c->conf->nodename, (const char *)rsi, |
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conns[dst - 1]->conf->nodename); |
357 |
} |
358 |
else |
359 |
c->recv_vpn_packet (pkt, rsi); |
360 |
} |
361 |
} |
362 |
|
363 |
void |
364 |
vpn::ipv4_ev (io_watcher &w, short revents) |
365 |
{ |
366 |
if (revents & (POLLIN | POLLERR)) |
367 |
{ |
368 |
vpn_packet *pkt = new vpn_packet; |
369 |
struct sockaddr_in sa; |
370 |
socklen_t sa_len = sizeof (sa); |
371 |
int len; |
372 |
|
373 |
len = recvfrom (w.fd, &((*pkt)[0]), MAXSIZE, 0, (sockaddr *)&sa, &sa_len); |
374 |
|
375 |
sockinfo si(sa, PROT_IPv4); |
376 |
|
377 |
if (len > 0) |
378 |
{ |
379 |
pkt->len = len; |
380 |
|
381 |
// raw sockets deliver the ipv4, but don't expect it on sends |
382 |
// this is slow, but... |
383 |
pkt->skip_hdr (IP_OVERHEAD); |
384 |
|
385 |
recv_vpn_packet (pkt, si); |
386 |
} |
387 |
else |
388 |
{ |
389 |
// probably ECONNRESET or somesuch |
390 |
slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
391 |
} |
392 |
|
393 |
delete pkt; |
394 |
} |
395 |
else if (revents & POLLHUP) |
396 |
{ |
397 |
// this cannot ;) happen on udp sockets |
398 |
slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating.")); |
399 |
exit (1); |
400 |
} |
401 |
else |
402 |
{ |
403 |
slog (L_ERR, |
404 |
_("FATAL: unknown revents %08x in socket, terminating\n"), |
405 |
revents); |
406 |
exit (1); |
407 |
} |
408 |
} |
409 |
|
410 |
void |
411 |
vpn::icmpv4_ev (io_watcher &w, short revents) |
412 |
{ |
413 |
if (revents & (POLLIN | POLLERR)) |
414 |
{ |
415 |
vpn_packet *pkt = new vpn_packet; |
416 |
struct sockaddr_in sa; |
417 |
socklen_t sa_len = sizeof (sa); |
418 |
int len; |
419 |
|
420 |
len = recvfrom (w.fd, &((*pkt)[0]), MAXSIZE, 0, (sockaddr *)&sa, &sa_len); |
421 |
|
422 |
sockinfo si(sa, PROT_ICMPv4); |
423 |
|
424 |
if (len > 0) |
425 |
{ |
426 |
pkt->len = len; |
427 |
|
428 |
icmphdr *hdr = (icmphdr *)&((*pkt)[IP_OVERHEAD]); |
429 |
|
430 |
if (hdr->type == ::conf.icmp_type |
431 |
&& hdr->code == 255) |
432 |
{ |
433 |
// raw sockets deliver the ipv4, but don't expect it on sends |
434 |
// this is slow, but... |
435 |
pkt->skip_hdr (ICMP_OVERHEAD); |
436 |
|
437 |
recv_vpn_packet (pkt, si); |
438 |
} |
439 |
} |
440 |
else |
441 |
{ |
442 |
// probably ECONNRESET or somesuch |
443 |
slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); |
444 |
} |
445 |
|
446 |
delete pkt; |
447 |
} |
448 |
else if (revents & POLLHUP) |
449 |
{ |
450 |
// this cannot ;) happen on udp sockets |
451 |
slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating.")); |
452 |
exit (1); |
453 |
} |
454 |
else |
455 |
{ |
456 |
slog (L_ERR, |
457 |
_("FATAL: unknown revents %08x in socket, terminating\n"), |
458 |
revents); |
459 |
exit (1); |
460 |
} |
461 |
} |
462 |
|
463 |
void |
464 |
vpn::udpv4_ev (io_watcher &w, short revents) |
465 |
{ |
466 |
if (revents & (POLLIN | POLLERR)) |
467 |
{ |
468 |
vpn_packet *pkt = new vpn_packet; |
469 |
struct sockaddr_in sa; |
470 |
socklen_t sa_len = sizeof (sa); |
471 |
int len; |
472 |
|
473 |
len = recvfrom (w.fd, &((*pkt)[0]), MAXSIZE, 0, (sockaddr *)&sa, &sa_len); |
474 |
|
475 |
sockinfo si(sa, PROT_UDPv4); |
476 |
|
477 |
if (len > 0) |
478 |
{ |
479 |
pkt->len = len; |
480 |
|
481 |
recv_vpn_packet (pkt, si); |
482 |
} |
483 |
else |
484 |
{ |
485 |
// probably ECONNRESET or somesuch |
486 |
slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno)); |
487 |
} |
488 |
|
489 |
delete pkt; |
490 |
} |
491 |
else if (revents & POLLHUP) |
492 |
{ |
493 |
// this cannot ;) happen on udp sockets |
494 |
slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating.")); |
495 |
exit (1); |
496 |
} |
497 |
else |
498 |
{ |
499 |
slog (L_ERR, |
500 |
_("FATAL: unknown revents %08x in socket, terminating\n"), |
501 |
revents); |
502 |
exit (1); |
503 |
} |
504 |
} |
505 |
|
506 |
void |
507 |
vpn::tap_ev (io_watcher &w, short revents) |
508 |
{ |
509 |
if (revents & POLLIN) |
510 |
{ |
511 |
/* process data */ |
512 |
tap_packet *pkt; |
513 |
|
514 |
pkt = tap->recv (); |
515 |
|
516 |
int dst = mac2id (pkt->dst); |
517 |
int src = mac2id (pkt->src); |
518 |
|
519 |
if (src != THISNODE->id) |
520 |
{ |
521 |
slog (L_ERR, _("FATAL: tap packet not originating on current node received, terminating.")); |
522 |
exit (1); |
523 |
} |
524 |
|
525 |
if (dst == THISNODE->id) |
526 |
{ |
527 |
slog (L_ERR, _("FATAL: tap packet destined for current node received, terminating.")); |
528 |
exit (1); |
529 |
} |
530 |
|
531 |
if (dst > conns.size ()) |
532 |
slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst); |
533 |
else |
534 |
{ |
535 |
if (dst) |
536 |
{ |
537 |
// unicast |
538 |
if (dst != THISNODE->id) |
539 |
conns[dst - 1]->inject_data_packet (pkt); |
540 |
} |
541 |
else |
542 |
{ |
543 |
// broadcast, first check router, then self, then english |
544 |
connection *router = find_router (); |
545 |
|
546 |
if (router) |
547 |
router->inject_data_packet (pkt, true); |
548 |
else |
549 |
for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
550 |
if ((*c)->conf != THISNODE) |
551 |
(*c)->inject_data_packet (pkt); |
552 |
} |
553 |
} |
554 |
|
555 |
delete pkt; |
556 |
} |
557 |
else if (revents & (POLLHUP | POLLERR)) |
558 |
{ |
559 |
slog (L_ERR, _("FATAL: POLLHUP or POLLERR on network device fd, terminating.")); |
560 |
exit (1); |
561 |
} |
562 |
else |
563 |
abort (); |
564 |
} |
565 |
|
566 |
void |
567 |
vpn::event_cb (time_watcher &w) |
568 |
{ |
569 |
if (events) |
570 |
{ |
571 |
if (events & EVENT_SHUTDOWN) |
572 |
{ |
573 |
slog (L_INFO, _("preparing shutdown...")); |
574 |
|
575 |
shutdown_all (); |
576 |
|
577 |
remove_pid (pidfilename); |
578 |
|
579 |
slog (L_INFO, _("terminating")); |
580 |
|
581 |
exit (0); |
582 |
} |
583 |
|
584 |
if (events & EVENT_RECONNECT) |
585 |
{ |
586 |
slog (L_INFO, _("forced reconnect")); |
587 |
|
588 |
reconnect_all (); |
589 |
} |
590 |
|
591 |
events = 0; |
592 |
} |
593 |
|
594 |
w.at = TSTAMP_CANCEL; |
595 |
} |
596 |
|
597 |
void |
598 |
vpn::shutdown_all () |
599 |
{ |
600 |
for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
601 |
(*c)->shutdown (); |
602 |
} |
603 |
|
604 |
void |
605 |
vpn::reconnect_all () |
606 |
{ |
607 |
for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
608 |
delete *c; |
609 |
|
610 |
conns.clear (); |
611 |
|
612 |
connection_init (); |
613 |
|
614 |
for (configuration::node_vector::iterator i = conf.nodes.begin (); |
615 |
i != conf.nodes.end (); ++i) |
616 |
{ |
617 |
connection *conn = new connection (this); |
618 |
|
619 |
conn->conf = *i; |
620 |
conns.push_back (conn); |
621 |
|
622 |
conn->establish_connection (); |
623 |
} |
624 |
} |
625 |
|
626 |
connection *vpn::find_router () |
627 |
{ |
628 |
u32 prio = 0; |
629 |
connection *router = 0; |
630 |
|
631 |
for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
632 |
{ |
633 |
connection *c = *i; |
634 |
|
635 |
if (c->conf->routerprio > prio |
636 |
&& c->connectmode == conf_node::C_ALWAYS |
637 |
&& c->conf != THISNODE |
638 |
&& c->ictx && c->octx) |
639 |
{ |
640 |
prio = c->conf->routerprio; |
641 |
router = c; |
642 |
} |
643 |
} |
644 |
|
645 |
return router; |
646 |
} |
647 |
|
648 |
void vpn::send_connect_request (int id) |
649 |
{ |
650 |
connection *c = find_router (); |
651 |
|
652 |
if (c) |
653 |
c->send_connect_request (id); |
654 |
else |
655 |
// no router found, aggressively connect to all routers |
656 |
for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) |
657 |
if ((*i)->conf->routerprio) |
658 |
(*i)->establish_connection (); |
659 |
} |
660 |
|
661 |
void |
662 |
connection::dump_status () |
663 |
{ |
664 |
slog (L_NOTICE, _("node %s (id %d)"), conf->nodename, conf->id); |
665 |
slog (L_NOTICE, _(" connectmode %d (%d) / sockaddr %s / minor %d"), |
666 |
connectmode, conf->connectmode, (const char *)si, (int)prot_minor); |
667 |
slog (L_NOTICE, _(" ictx/octx %08lx/%08lx / oseqno %d / retry_cnt %d"), |
668 |
(long)ictx, (long)octx, (int)oseqno, (int)retry_cnt); |
669 |
slog (L_NOTICE, _(" establish_conn %ld / rekey %ld / keepalive %ld"), |
670 |
(long)(establish_connection.at), (long)(rekey.at), (long)(keepalive.at)); |
671 |
} |
672 |
|
673 |
void |
674 |
vpn::dump_status () |
675 |
{ |
676 |
slog (L_NOTICE, _("BEGIN status dump (%ld)"), (long)NOW); |
677 |
|
678 |
for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) |
679 |
(*c)->dump_status (); |
680 |
|
681 |
slog (L_NOTICE, _("END status dump")); |
682 |
} |
683 |
|
684 |
vpn::vpn (void) |
685 |
: event (this, &vpn::event_cb) |
686 |
, udpv4_ev_watcher (this, &vpn::udpv4_ev) |
687 |
, ipv4_ev_watcher (this, &vpn::ipv4_ev) |
688 |
#if ENABLE_TCP |
689 |
, tcpv4_ev_watcher (this, &vpn::tcpv4_ev) |
690 |
#endif |
691 |
#if ENABLE_ICMP |
692 |
, icmpv4_ev_watcher(this, &vpn::icmpv4_ev) |
693 |
#endif |
694 |
, tap_ev_watcher (this, &vpn::tap_ev) |
695 |
{ |
696 |
} |
697 |
|
698 |
vpn::~vpn () |
699 |
{ |
700 |
} |
701 |
|