… | |
… | |
147 | int |
147 | int |
148 | vpn::setup () |
148 | vpn::setup () |
149 | { |
149 | { |
150 | int success = 0; |
150 | int success = 0; |
151 | |
151 | |
|
|
152 | #if 1//D2 |
152 | ipv4_tos = -1; |
153 | ipv42_tos = -1; |
153 | ipv4_fd = -1; |
154 | ipv42_fd = -1; |
154 | |
155 | |
155 | if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto) |
156 | if (THISNODE->protocols & PROT_IPv42 && ::conf.ip_proto) |
156 | { |
157 | { |
157 | ipv4_fd = setup_socket (PROT_IPv4, PF_INET, SOCK_RAW, ::conf.ip_proto); |
158 | ipv42_fd = setup_socket (PROT_IPv42, PF_INET, SOCK_RAW, ::conf.ip2_proto); |
158 | |
159 | |
159 | if (ipv4_fd < 0) |
160 | if (ipv42_fd < 0) |
160 | return -1; |
161 | return -1; |
161 | |
162 | |
162 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
163 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
163 | // this I really consider a linux bug. I am neither connected |
164 | // this I really consider a linux bug. I am neither connected |
164 | // nor do I fragment myself. Linux still sets DF and doesn't |
165 | // nor do I fragment myself. Linux still sets DF and doesn't |
165 | // fragment for me sometimes. |
166 | // fragment for me sometimes. |
166 | { |
167 | { |
167 | int oval = IP_PMTUDISC_DONT; |
168 | int oval = IP_PMTUDISC_DONT; |
168 | setsockopt (ipv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
169 | setsockopt (ipv42_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
169 | } |
170 | } |
170 | #endif |
171 | #endif |
171 | |
172 | |
172 | sockinfo si (THISNODE, PROT_IPv4); |
173 | sockinfo si (THISNODE, PROT_IPv42); |
173 | |
174 | |
174 | if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) |
175 | if (bind (ipv42_fd, si.sav4 (), si.salenv4 ())) |
175 | { |
176 | { |
176 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s, exiting."), (const char *)si, strerror (errno)); |
177 | slog (L_ERR, _("can't bind ipv42 socket on %s: %s, exiting."), (const char *)si, strerror (errno)); |
177 | return -1; |
178 | return -1; |
178 | } |
179 | } |
179 | |
180 | |
180 | ipv4_ev_watcher.start (ipv4_fd, EV_READ); |
181 | ipv42_ev_watcher.start (ipv42_fd, EV_READ); |
181 | ++success; |
182 | ++success; |
182 | } |
183 | } |
183 | else |
184 | else |
184 | THISNODE->protocols &= ~PROT_IPv4; |
185 | THISNODE->protocols &= ~PROT_IPv42; |
|
|
186 | #endif |
185 | |
187 | |
186 | udpv4_tos = -1; |
188 | ipv4_tos = -1; |
187 | udpv4_fd = -1; |
189 | ipv4_fd = -1; |
188 | |
190 | |
189 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
191 | if (THISNODE->protocols & PROT_IPv4 && ::conf.ip_proto) |
190 | { |
192 | { |
191 | udpv4_fd = setup_socket (PROT_UDPv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
193 | ipv4_fd = setup_socket (PROT_IPv4, PF_INET, SOCK_RAW, ::conf.ip_proto); |
192 | |
194 | |
193 | if (udpv4_fd < 0) |
195 | if (ipv4_fd < 0) |
194 | return -1; |
196 | return -1; |
195 | |
|
|
196 | // standard daemon practise... |
|
|
197 | { |
|
|
198 | int oval = 1; |
|
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199 | setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
|
|
200 | } |
|
|
201 | |
197 | |
202 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
198 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
203 | // this I really consider a linux bug. I am neither connected |
199 | // this I really consider a linux bug. I am neither connected |
204 | // nor do I fragment myself. Linux still sets DF and doesn't |
200 | // nor do I fragment myself. Linux still sets DF and doesn't |
205 | // fragment for me sometimes. |
201 | // fragment for me sometimes. |
206 | { |
202 | { |
207 | int oval = IP_PMTUDISC_DONT; |
203 | int oval = IP_PMTUDISC_DONT; |
|
|
204 | setsockopt (ipv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
|
|
205 | } |
|
|
206 | #endif |
|
|
207 | |
|
|
208 | sockinfo si (THISNODE, PROT_IPv4); |
|
|
209 | |
|
|
210 | if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) |
|
|
211 | { |
|
|
212 | slog (L_ERR, _("can't bind ipv4 socket on %s: %s, exiting."), (const char *)si, strerror (errno)); |
|
|
213 | return -1; |
|
|
214 | } |
|
|
215 | |
|
|
216 | ipv4_ev_watcher.start (ipv4_fd, EV_READ); |
|
|
217 | ++success; |
|
|
218 | } |
|
|
219 | else |
|
|
220 | THISNODE->protocols &= ~PROT_IPv4; |
|
|
221 | |
|
|
222 | udpv4_tos = -1; |
|
|
223 | udpv4_fd = -1; |
|
|
224 | |
|
|
225 | if (THISNODE->protocols & PROT_UDPv4 && THISNODE->udp_port) |
|
|
226 | { |
|
|
227 | udpv4_fd = setup_socket (PROT_UDPv4, PF_INET, SOCK_DGRAM, IPPROTO_UDP); |
|
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228 | |
|
|
229 | if (udpv4_fd < 0) |
|
|
230 | return -1; |
|
|
231 | |
|
|
232 | // standard daemon practise... |
|
|
233 | { |
|
|
234 | int oval = 1; |
|
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235 | setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval); |
|
|
236 | } |
|
|
237 | |
|
|
238 | #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) |
|
|
239 | // this I really consider a linux bug. I am neither connected |
|
|
240 | // nor do I fragment myself. Linux still sets DF and doesn't |
|
|
241 | // fragment for me sometimes. |
|
|
242 | { |
|
|
243 | int oval = IP_PMTUDISC_DONT; |
208 | setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
244 | setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); |
209 | } |
245 | } |
210 | #endif |
246 | #endif |
211 | |
247 | |
212 | sockinfo si (THISNODE, PROT_UDPv4); |
248 | sockinfo si (THISNODE, PROT_UDPv4); |
… | |
… | |
399 | set_tos (ipv4_fd, ipv4_tos, tos); |
435 | set_tos (ipv4_fd, ipv4_tos, tos); |
400 | sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
436 | sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
401 | |
437 | |
402 | return true; |
438 | return true; |
403 | } |
439 | } |
|
|
440 | |
|
|
441 | #if 1 //D |
|
|
442 | bool |
|
|
443 | vpn::send_ipv42_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
|
|
444 | { |
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445 | set_tos (ipv42_fd, ipv42_tos, tos); |
|
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446 | sendto (ipv42_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); |
|
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447 | |
|
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448 | return true; |
|
|
449 | } |
|
|
450 | #endif |
404 | |
451 | |
405 | static u16 |
452 | static u16 |
406 | ipv4_checksum (u16 *data, unsigned int len) |
453 | ipv4_checksum (u16 *data, unsigned int len) |
407 | { |
454 | { |
408 | // use 32 bit accumulator and fold back carry bits at the end |
455 | // use 32 bit accumulator and fold back carry bits at the end |
… | |
… | |
482 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len); |
529 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst (), pkt->len); |
483 | |
530 | |
484 | if (src == 0 || src > conns.size () |
531 | if (src == 0 || src > conns.size () |
485 | || dst > conns.size () |
532 | || dst > conns.size () |
486 | || pkt->typ () >= vpn_packet::PT_MAX) |
533 | || pkt->typ () >= vpn_packet::PT_MAX) |
487 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."), |
|
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488 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
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489 | else if (dst > conns.size ()) |
|
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490 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."), |
534 | slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)."), |
491 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
535 | (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); |
492 | else |
536 | else |
493 | { |
537 | { |
494 | connection *c = conns[src - 1]; |
538 | connection *c = conns[src - 1]; |
… | |
… | |
515 | bool |
559 | bool |
516 | vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
560 | vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos) |
517 | { |
561 | { |
518 | switch (si.prot) |
562 | switch (si.prot) |
519 | { |
563 | { |
|
|
564 | #if 1//D2 |
|
|
565 | case PROT_IPv42: |
|
|
566 | return send_ipv42_packet (pkt, si, tos); |
|
|
567 | #endif |
|
|
568 | |
520 | case PROT_IPv4: |
569 | case PROT_IPv4: |
521 | return send_ipv4_packet (pkt, si, tos); |
570 | return send_ipv4_packet (pkt, si, tos); |
522 | |
571 | |
523 | case PROT_UDPv4: |
572 | case PROT_UDPv4: |
524 | return send_udpv4_packet (pkt, si, tos); |
573 | return send_udpv4_packet (pkt, si, tos); |
… | |
… | |
539 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si); |
588 | slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol."), (const char *)si); |
540 | } |
589 | } |
541 | |
590 | |
542 | return false; |
591 | return false; |
543 | } |
592 | } |
|
|
593 | |
|
|
594 | #if 1//D2 |
|
|
595 | inline void |
|
|
596 | vpn::ipv42_ev (ev::io &w, int revents) |
|
|
597 | { |
|
|
598 | if (revents & EV_READ) |
|
|
599 | { |
|
|
600 | vpn_packet *pkt = new vpn_packet; |
|
|
601 | struct sockaddr_in sa; |
|
|
602 | socklen_t sa_len = sizeof (sa); |
|
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603 | int len; |
|
|
604 | |
|
|
605 | len = recvfrom (w.fd, &((*pkt)[0]), MAXSIZE, 0, (sockaddr *)&sa, &sa_len); |
|
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606 | |
|
|
607 | sockinfo si(sa, PROT_IPv42); |
|
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608 | |
|
|
609 | if (len > 0) |
|
|
610 | { |
|
|
611 | pkt->len = len; |
|
|
612 | |
|
|
613 | // raw sockets deliver the ipv4 header, but don't expect it on sends |
|
|
614 | pkt->skip_hdr (pkt->ipv4_hdr_len ()); |
|
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615 | |
|
|
616 | recv_vpn_packet (pkt, si); |
|
|
617 | } |
|
|
618 | else |
|
|
619 | { |
|
|
620 | // probably ECONNRESET or somesuch |
|
|
621 | slog (L_DEBUG, _("%s: %s."), (const char *)si, strerror (errno)); |
|
|
622 | } |
|
|
623 | |
|
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624 | delete pkt; |
|
|
625 | } |
|
|
626 | else |
|
|
627 | { |
|
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628 | slog (L_ERR, |
|
|
629 | _("FATAL: unknown revents %08x in socket, exiting.\n"), |
|
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630 | revents); |
|
|
631 | exit (EXIT_FAILURE); |
|
|
632 | } |
|
|
633 | } |
|
|
634 | #endif |
544 | |
635 | |
545 | inline void |
636 | inline void |
546 | vpn::ipv4_ev (ev::io &w, int revents) |
637 | vpn::ipv4_ev (ev::io &w, int revents) |
547 | { |
638 | { |
548 | if (revents & EV_READ) |
639 | if (revents & EV_READ) |
… | |
… | |
881 | vpn::vpn (void) |
972 | vpn::vpn (void) |
882 | { |
973 | { |
883 | event .set<vpn, &vpn::event_cb > (this); |
974 | event .set<vpn, &vpn::event_cb > (this); |
884 | udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this); |
975 | udpv4_ev_watcher .set<vpn, &vpn::udpv4_ev > (this); |
885 | ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this); |
976 | ipv4_ev_watcher .set<vpn, &vpn::ipv4_ev > (this); |
|
|
977 | #if 1//D2 |
|
|
978 | ipv42_ev_watcher .set<vpn, &vpn::ipv42_ev > (this); |
|
|
979 | #endif |
886 | #if ENABLE_TCP |
980 | #if ENABLE_TCP |
887 | tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this); |
981 | tcpv4_ev_watcher .set<vpn, &vpn::tcpv4_ev > (this); |
888 | #endif |
982 | #endif |
889 | #if ENABLE_ICMP |
983 | #if ENABLE_ICMP |
890 | icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this); |
984 | icmpv4_ev_watcher.set<vpn, &vpn::icmpv4_ev> (this); |