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Comparing gvpe/src/vpn.C (file contents):
Revision 1.7 by pcg, Sun Apr 6 18:12:18 2003 UTC vs.
Revision 1.16 by pcg, Tue Oct 14 19:59:16 2003 UTC

… …
24#include <cstring> 24#include <cstring>
25#include <cstdio> 25#include <cstdio>
26 26
27#include <sys/types.h> 27#include <sys/types.h>
28#include <sys/socket.h> 28#include <sys/socket.h>
29#include <sys/poll.h>
30#include <sys/wait.h> 29#include <sys/wait.h>
31#include <netinet/in.h>
32#include <arpa/inet.h>
33#include <errno.h> 30#include <errno.h>
34#include <time.h> 31#include <time.h>
35#include <unistd.h> 32#include <unistd.h>
33#include <fcntl.h>
34#include <sys/socket.h>
35
36#include "netcompat.h"
36 37
37#include "pidfile.h" 38#include "pidfile.h"
38 39
39#include "connection.h" 40#include "connection.h"
40#include "util.h" 41#include "util.h"
… …
71} 72}
72 73
73int 74int
74vpn::setup () 75vpn::setup ()
75{ 76{
77 ipv4_fd = -1;
78
79 if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto)
80 {
81 ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);
82
83 if (ipv4_fd < 0)
84 return -1;
85
86 fcntl (ipv4_fd, F_SETFL, O_NONBLOCK);
87
88#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
89 // this I really consider a linux bug. I am neither connected
90 // nor do I fragment myself. Linux still sets DF and doesn't
91 // fragment for me sometimes.
92 {
93 int oval = IP_PMTUDISC_DONT;
94 setsockopt (ipv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
95 }
96#endif
97
98 sockinfo si (THISNODE, PROT_IPv4);
99
100 if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
101 {
102 slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));
103 exit (1);
104 }
105
106 ipv4_ev_watcher.start (ipv4_fd, POLLIN);
107 }
108
76 udpv4_fd = -1; 109 udpv4_fd = -1;
77 110
78 if (THISNODE->protocols & PROT_UDPv4) 111 if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port)
79 { 112 {
80 udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); 113 udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
81 114
82 if (udpv4_fd < 0) 115 if (udpv4_fd < 0)
83 return -1; 116 return -1;
117
118 fcntl (udpv4_fd, F_SETFL, O_NONBLOCK);
84 119
85 // standard daemon practise... 120 // standard daemon practise...
86 { 121 {
87 int oval = 1; 122 int oval = 1;
88 setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); 123 setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
89 } 124 }
90 125
91 sockinfo si (THISNODE, PROT_UDPv4); 126#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
92
93 if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
94 {
95 slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));
96 exit (1);
97 }
98
99#ifdef IP_MTU_DISCOVER
100 // this I really consider a linux bug. I am neither connected 127 // this I really consider a linux bug. I am neither connected
101 // nor do I fragment myself. Linux still sets DF and doesn't 128 // nor do I fragment myself. Linux still sets DF and doesn't
102 // fragment for me sometimes. 129 // fragment for me sometimes.
103 { 130 {
104 int oval = IP_PMTUDISC_DONT; 131 int oval = IP_PMTUDISC_DONT;
105 setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); 132 setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
106 } 133 }
107#endif 134#endif
108 135
136 sockinfo si (THISNODE, PROT_UDPv4);
137
138 if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
139 {
140 slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));
141 exit (1);
142 }
143
109 udpv4_ev_watcher.start (udpv4_fd, POLLIN); 144 udpv4_ev_watcher.start (udpv4_fd, POLLIN);
110 } 145 }
111 146
112 ipv4_fd = -1; 147 icmpv4_fd = -1;
148
149#if ENABLE_ICMP
113 if (THISNODE->protocols & PROT_IPv4) 150 if (THISNODE->protocols & PROT_ICMPv4)
114 { 151 {
115 ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto); 152 icmpv4_fd = socket (PF_INET, SOCK_RAW, IPPROTO_ICMP);
116 153
117 if (ipv4_fd < 0) 154 if (icmpv4_fd < 0)
118 return -1; 155 return -1;
119 156
120 sockinfo si (THISNODE, PROT_IPv4); 157 fcntl (icmpv4_fd, F_SETFL, O_NONBLOCK);
121 158
122 if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) 159#ifdef ICMP_FILTER
123 { 160 {
124 slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno)); 161 icmp_filter oval;
125 exit (1); 162 oval.data = 0xffffffff;
163 if (::conf.icmp_type < 32)
164 oval.data &= ~(1 << ::conf.icmp_type);
165
166 setsockopt (icmpv4_fd, SOL_RAW, ICMP_FILTER, &oval, sizeof oval);
126 } 167 }
168#endif
127 169
128#ifdef IP_MTU_DISCOVER 170#if defined(SOL_IP) && defined(IP_MTU_DISCOVER)
129 // this I really consider a linux bug. I am neither connected 171 // this I really consider a linux bug. I am neither connected
130 // nor do I fragment myself. Linux still sets DF and doesn't 172 // nor do I fragment myself. Linux still sets DF and doesn't
131 // fragment for me sometimes. 173 // fragment for me sometimes.
132 { 174 {
133 int oval = IP_PMTUDISC_DONT; 175 int oval = IP_PMTUDISC_DONT;
134 setsockopt (ipv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); 176 setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
135 } 177 }
136#endif 178#endif
137 179
180 sockinfo si (THISNODE, PROT_ICMPv4);
181
182 if (bind (icmpv4_fd, si.sav4 (), si.salenv4 ()))
183 {
184 slog (L_ERR, _("can't bind icmpv4 on %s: %s"), (const char *)si, strerror (errno));
185 exit (1);
186 }
187
138 ipv4_ev_watcher.start (ipv4_fd, POLLIN); 188 icmpv4_ev_watcher.start (icmpv4_fd, POLLIN);
139 } 189 }
190#endif
191
192 tcpv4_fd = -1;
140 193
141#if ENABLE_TCP 194#if ENABLE_TCP
142 if (THISNODE->protocols & PROT_TCPv4) 195 if (THISNODE->protocols & PROT_TCPv4 && THISNODE->tcp_port)
143 { 196 {
144 tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP); 197 tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
145 198
146 if (tcpv4_fd < 0) 199 if (tcpv4_fd < 0)
147 return -1; 200 return -1;
201
202 fcntl (tcpv4_fd, F_SETFL, O_NONBLOCK);
148 203
149 // standard daemon practise... 204 // standard daemon practise...
150 { 205 {
151 int oval = 1; 206 int oval = 1;
152 setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); 207 setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
… …
201#if ENABLE_TCP 256#if ENABLE_TCP
202 case PROT_TCPv4: 257 case PROT_TCPv4:
203 return send_tcpv4_packet (pkt, si, tos); 258 return send_tcpv4_packet (pkt, si, tos);
204#endif 259#endif
205 260
261#if ENABLE_ICMP
262 case PROT_ICMPv4:
263 return send_icmpv4_packet (pkt, si, tos);
264#endif
265
206 default: 266 default:
207 slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si); 267 slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
208 return false; 268 return false;
209 } 269 }
210} 270}
211 271
212bool 272bool
213vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) 273vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
214{ 274{
275#if defined(SOL_IP) && defined(IP_TOS)
215 setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); 276 setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
277#endif
216 sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); 278 sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
217 279
218 return true; 280 return true;
219} 281}
282
283static u16
284ipv4_checksum (u16 *data, unsigned int len)
285{
286 // use 32 bit accumulator and fold back carry bits at the end
287 u32 sum = 0;
288
289 while (len > 1)
290 {
291 sum += *data++;
292 len -= 2;
293 }
294
295 // odd byte left?
296 if (len)
297 sum += *(u8 *)data;
298
299 // add back carry bits
300 sum = (sum >> 16) + (sum & 0xffff); // lo += hi
301 sum += (sum >> 16); // carry
302
303 return ~sum;
304}
305
306#if ENABLE_ICMP
307bool
308vpn::send_icmpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
309{
310#if defined(SOL_IP) && defined(IP_TOS)
311 setsockopt (icmpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
312#endif
313
314 pkt->unshift_hdr (4);
315
316 icmp_header *hdr = (icmp_header *)&((*pkt)[0]);
317 hdr->type = ::conf.icmp_type;
318 hdr->code = 255;
319 hdr->checksum = 0;
320 hdr->checksum = ipv4_checksum ((u16 *)hdr, pkt->len);
321
322 sendto (icmpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
323
324 return true;
325}
326#endif
220 327
221bool 328bool
222vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) 329vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
223{ 330{
331#if defined(SOL_IP) && defined(IP_TOS)
224 setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); 332 setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
333#endif
225 sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); 334 sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
226 335
227 return true; 336 return true;
228} 337}
229 338
… …
246 (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); 355 (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
247 else 356 else
248 { 357 {
249 connection *c = conns[src - 1]; 358 connection *c = conns[src - 1];
250 359
251 if (dst == 0 && !THISNODE->routerprio) 360 if (dst == 0)
252 slog (L_WARN, _("%s(%s): received broadcast, but we are no router"), 361 slog (L_WARN, _("%s(%s): received broadcast (protocol violation)"),
253 c->conf->nodename, (const char *)rsi); 362 c->conf->nodename, (const char *)rsi);
254 else if (dst != 0 && dst != THISNODE->id) 363 else if (dst != 0 && dst != THISNODE->id)
255 { 364 {
256 if (THISNODE->routerprio) 365 if (THISNODE->routerprio)
257 // the tos setting gets lost here. who cares. 366 // the tos setting gets lost here. who cares.
… …
266 c->recv_vpn_packet (pkt, rsi); 375 c->recv_vpn_packet (pkt, rsi);
267 } 376 }
268} 377}
269 378
270void 379void
271vpn::udpv4_ev (io_watcher &w, short revents) 380vpn::ipv4_ev (io_watcher &w, short revents)
272{ 381{
273 if (revents & (POLLIN | POLLERR)) 382 if (revents & (POLLIN | POLLERR))
274 { 383 {
275 vpn_packet *pkt = new vpn_packet; 384 vpn_packet *pkt = new vpn_packet;
276 struct sockaddr_in sa; 385 struct sockaddr_in sa;
277 socklen_t sa_len = sizeof (sa); 386 socklen_t sa_len = sizeof (sa);
278 int len; 387 int len;
279 388
280 len = recvfrom (w.fd, &((*pkt)[0]), MAXSIZE, 0, (sockaddr *)&sa, &sa_len); 389 len = recvfrom (w.fd, &((*pkt)[0]), MAXSIZE, 0, (sockaddr *)&sa, &sa_len);
281 390
282 sockinfo si(sa, PROT_UDPv4); 391 sockinfo si(sa, PROT_IPv4);
283 392
284 if (len > 0) 393 if (len > 0)
285 { 394 {
286 pkt->len = len; 395 pkt->len = len;
287 396
397 // raw sockets deliver the ipv4, but don't expect it on sends
398 // this is slow, but...
399 pkt->skip_hdr (IP_OVERHEAD);
400
288 recv_vpn_packet (pkt, si); 401 recv_vpn_packet (pkt, si);
289 } 402 }
290 else 403 else
291 { 404 {
292 // probably ECONNRESET or somesuch 405 // probably ECONNRESET or somesuch
293 slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno)); 406 slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
294 } 407 }
295 408
296 delete pkt; 409 delete pkt;
297 } 410 }
298 else if (revents & POLLHUP) 411 else if (revents & POLLHUP)
299 { 412 {
300 // this cannot ;) happen on udp sockets 413 // this cannot ;) happen on udp sockets
301 slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating.")); 414 slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating."));
302 exit (1); 415 exit (1);
303 } 416 }
304 else 417 else
305 { 418 {
306 slog (L_ERR, 419 slog (L_ERR,
… …
308 revents); 421 revents);
309 exit (1); 422 exit (1);
310 } 423 }
311} 424}
312 425
426#if ENABLE_ICMP
313void 427void
314vpn::ipv4_ev (io_watcher &w, short revents) 428vpn::icmpv4_ev (io_watcher &w, short revents)
315{ 429{
316 if (revents & (POLLIN | POLLERR)) 430 if (revents & (POLLIN | POLLERR))
317 { 431 {
318 vpn_packet *pkt = new vpn_packet; 432 vpn_packet *pkt = new vpn_packet;
319 struct sockaddr_in sa; 433 struct sockaddr_in sa;
320 socklen_t sa_len = sizeof (sa); 434 socklen_t sa_len = sizeof (sa);
321 int len; 435 int len;
322 436
323 len = recvfrom (w.fd, &((*pkt)[0]), MAXSIZE, 0, (sockaddr *)&sa, &sa_len); 437 len = recvfrom (w.fd, &((*pkt)[0]), MAXSIZE, 0, (sockaddr *)&sa, &sa_len);
324 438
325 sockinfo si(sa, PROT_IPv4); 439 sockinfo si(sa, PROT_ICMPv4);
326 440
327 if (len > 0) 441 if (len > 0)
328 { 442 {
329 pkt->len = len; 443 pkt->len = len;
330 444
445 icmp_header *hdr = (icmp_header *)&((*pkt)[IP_OVERHEAD]);
446
447 if (hdr->type == ::conf.icmp_type
448 && hdr->code == 255)
449 {
331 // raw sockets deliver the ipv4, but don't expect it on sends 450 // raw sockets deliver the ipv4, but don't expect it on sends
332 // this is slow, but... 451 // this is slow, but...
333 pkt->skip_hdr (IP_OVERHEAD); 452 pkt->skip_hdr (ICMP_OVERHEAD);
334 453
335 recv_vpn_packet (pkt, si); 454 recv_vpn_packet (pkt, si);
455 }
336 } 456 }
337 else 457 else
338 { 458 {
339 // probably ECONNRESET or somesuch 459 // probably ECONNRESET or somesuch
340 slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); 460 slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno));
… …
343 delete pkt; 463 delete pkt;
344 } 464 }
345 else if (revents & POLLHUP) 465 else if (revents & POLLHUP)
346 { 466 {
347 // this cannot ;) happen on udp sockets 467 // this cannot ;) happen on udp sockets
348 slog (L_ERR, _("FATAL: POLLHUP on ipv4 fd, terminating.")); 468 slog (L_ERR, _("FATAL: POLLHUP on icmpv4 fd, terminating."));
349 exit (1); 469 exit (1);
350 } 470 }
351 else 471 else
352 { 472 {
353 slog (L_ERR, 473 slog (L_ERR,
354 _("FATAL: unknown revents %08x in socket, terminating\n"), 474 _("FATAL: unknown revents %08x in socket, terminating\n"),
355 revents); 475 revents);
356 exit (1); 476 exit (1);
357 } 477 }
358} 478}
479#endif
480
481void
482vpn::udpv4_ev (io_watcher &w, short revents)
483{
484 if (revents & (POLLIN | POLLERR))
485 {
486 vpn_packet *pkt = new vpn_packet;
487 struct sockaddr_in sa;
488 socklen_t sa_len = sizeof (sa);
489 int len;
490
491 len = recvfrom (w.fd, &((*pkt)[0]), MAXSIZE, 0, (sockaddr *)&sa, &sa_len);
492
493 sockinfo si(sa, PROT_UDPv4);
494
495 if (len > 0)
496 {
497 pkt->len = len;
498
499 recv_vpn_packet (pkt, si);
500 }
501 else
502 {
503 // probably ECONNRESET or somesuch
504 slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));
505 }
506
507 delete pkt;
508 }
509 else if (revents & POLLHUP)
510 {
511 // this cannot ;) happen on udp sockets
512 slog (L_ERR, _("FATAL: POLLHUP on udp v4 fd, terminating."));
513 exit (1);
514 }
515 else
516 {
517 slog (L_ERR,
518 _("FATAL: unknown revents %08x in socket, terminating\n"),
519 revents);
520 exit (1);
521 }
522}
359 523
360void 524void
361vpn::tap_ev (io_watcher &w, short revents) 525vpn::tap_ev (io_watcher &w, short revents)
362{ 526{
363 if (revents & POLLIN) 527 if (revents & POLLIN)
… …
370 int dst = mac2id (pkt->dst); 534 int dst = mac2id (pkt->dst);
371 int src = mac2id (pkt->src); 535 int src = mac2id (pkt->src);
372 536
373 if (src != THISNODE->id) 537 if (src != THISNODE->id)
374 { 538 {
375 slog (L_ERR, _("FATAL: tap packet not originating on current node received, terminating.")); 539 slog (L_ERR, _("FATAL: tap packet not originating on current node received, exiting."));
376 exit (1); 540 exit (1);
377 } 541 }
378 542
379 if (dst == THISNODE->id) 543 if (dst == THISNODE->id)
380 { 544 {
381 slog (L_ERR, _("FATAL: tap packet destined for current node received, terminating.")); 545 slog (L_ERR, _("FATAL: tap packet destined for current node received, exiting."));
382 exit (1); 546 exit (1);
383 } 547 }
384 548
385 if (dst > conns.size ()) 549 if (dst > conns.size ())
386 slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst); 550 slog (L_ERR, _("tap packet for unknown node %d received, ignoring."), dst);
… …
392 if (dst != THISNODE->id) 556 if (dst != THISNODE->id)
393 conns[dst - 1]->inject_data_packet (pkt); 557 conns[dst - 1]->inject_data_packet (pkt);
394 } 558 }
395 else 559 else
396 { 560 {
397 // broadcast, first check router, then self, then english 561 // broadcast, this is ugly, but due to the security policy
398 connection *router = find_router (); 562 // we have to connect to all hosts...
399
400 if (router)
401 router->inject_data_packet (pkt, true);
402 else
403 for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c) 563 for (conns_vector::iterator c = conns.begin (); c != conns.end (); ++c)
404 if ((*c)->conf != THISNODE) 564 if ((*c)->conf != THISNODE)
405 (*c)->inject_data_packet (pkt); 565 (*c)->inject_data_packet (pkt);
406 } 566 }
407 } 567 }
408 568
409 delete pkt; 569 delete pkt;
410 } 570 }
… …
477 } 637 }
478} 638}
479 639
480connection *vpn::find_router () 640connection *vpn::find_router ()
481{ 641{
482 u32 prio = 0; 642 u32 prio = 1;
483 connection *router = 0; 643 connection *router = 0;
484 644
485 for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) 645 for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
486 { 646 {
487 connection *c = *i; 647 connection *c = *i;
488 648
489 if (c->conf->routerprio > prio 649 if (c->conf->routerprio > prio
490 && c->connectmode == conf_node::C_ALWAYS 650 && c->connectmode == conf_node::C_ALWAYS // so we don't drop the connection if in use
491 && c->conf != THISNODE
492 && c->ictx && c->octx) 651 && c->ictx && c->octx
652 && c->conf != THISNODE) // redundant, since ictx==octx==0 always on thisnode
493 { 653 {
494 prio = c->conf->routerprio; 654 prio = c->conf->routerprio;
495 router = c; 655 router = c;
496 } 656 }
497 } 657 }
… …
506 if (c) 666 if (c)
507 c->send_connect_request (id); 667 c->send_connect_request (id);
508 else 668 else
509 // no router found, aggressively connect to all routers 669 // no router found, aggressively connect to all routers
510 for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) 670 for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
511 if ((*i)->conf->routerprio) 671 if ((*i)->conf->routerprio && (*i)->conf != THISNODE)
512 (*i)->establish_connection (); 672 (*i)->establish_connection ();
513} 673}
514 674
515void 675void
516connection::dump_status () 676connection::dump_status ()
… …
534 694
535 slog (L_NOTICE, _("END status dump")); 695 slog (L_NOTICE, _("END status dump"));
536} 696}
537 697
538vpn::vpn (void) 698vpn::vpn (void)
539: event(this, &vpn::event_cb) 699: event (this, &vpn::event_cb)
540, udpv4_ev_watcher(this, &vpn::udpv4_ev) 700, udpv4_ev_watcher (this, &vpn::udpv4_ev)
541, ipv4_ev_watcher (this, &vpn::ipv4_ev) 701, ipv4_ev_watcher (this, &vpn::ipv4_ev)
542, tap_ev_watcher (this, &vpn::tap_ev)
543#if ENABLE_TCP 702#if ENABLE_TCP
544, tcpv4_ev_watcher(this, &vpn::tcpv4_ev) 703, tcpv4_ev_watcher (this, &vpn::tcpv4_ev)
545#endif 704#endif
705#if ENABLE_ICMP
706, icmpv4_ev_watcher(this, &vpn::icmpv4_ev)
707#endif
708, tap_ev_watcher (this, &vpn::tap_ev)
546{ 709{
547} 710}
548 711
549vpn::~vpn () 712vpn::~vpn ()
550{ 713{

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