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Comparing gvpe/src/vpn.C (file contents):
Revision 1.1 by pcg, Wed Apr 2 03:25:17 2003 UTC vs.
Revision 1.7 by pcg, Sun Apr 6 18:12:18 2003 UTC

… …
40#include "util.h" 40#include "util.h"
41#include "vpn.h" 41#include "vpn.h"
42 42
43///////////////////////////////////////////////////////////////////////////// 43/////////////////////////////////////////////////////////////////////////////
44 44
45const char *vpn::script_if_up (int) 45const char *vpn::script_if_up ()
46{ 46{
47 // the tunnel device mtu should be the physical mtu - overhead 47 // the tunnel device mtu should be the physical mtu - overhead
48 // the tricky part is rounding to the cipher key blocksize 48 // the tricky part is rounding to the cipher key blocksize
49 int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD; 49 int mtu = conf.mtu - ETH_OVERHEAD - VPE_OVERHEAD - MAX_OVERHEAD;
50 mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion 50 mtu += ETH_OVERHEAD - 6 - 6; // now we have the data portion
… …
71} 71}
72 72
73int 73int
74vpn::setup () 74vpn::setup ()
75{ 75{
76 sockinfo si;
77
78 si.set (THISNODE);
79
80 udpv4_fd = -1; 76 udpv4_fd = -1;
81 77
82 if (THISNODE->protocols & PROT_UDPv4) 78 if (THISNODE->protocols & PROT_UDPv4)
83 { 79 {
84 udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP); 80 udpv4_fd = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
85 81
86 if (udpv4_fd < 0) 82 if (udpv4_fd < 0)
87 return -1; 83 return -1;
88 84
85 // standard daemon practise...
86 {
87 int oval = 1;
88 setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
89 }
90
91 sockinfo si (THISNODE, PROT_UDPv4);
92
89 if (bind (udpv4_fd, si.sav4 (), si.salenv4 ())) 93 if (bind (udpv4_fd, si.sav4 (), si.salenv4 ()))
90 { 94 {
91 slog (L_ERR, _("can't bind udpv4 to %s: %s"), (const char *)si, strerror (errno)); 95 slog (L_ERR, _("can't bind udpv4 on %s: %s"), (const char *)si, strerror (errno));
92 exit (1); 96 exit (1);
93 } 97 }
94 98
95#ifdef IP_MTU_DISCOVER 99#ifdef IP_MTU_DISCOVER
96 // this I really consider a linux bug. I am neither connected 100 // this I really consider a linux bug. I am neither connected
… …
100 int oval = IP_PMTUDISC_DONT; 104 int oval = IP_PMTUDISC_DONT;
101 setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval); 105 setsockopt (udpv4_fd, SOL_IP, IP_MTU_DISCOVER, &oval, sizeof oval);
102 } 106 }
103#endif 107#endif
104 108
105 // standard daemon practise...
106 {
107 int oval = 1;
108 setsockopt (udpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
109 }
110
111 udpv4_ev_watcher.start (udpv4_fd, POLLIN); 109 udpv4_ev_watcher.start (udpv4_fd, POLLIN);
112 } 110 }
113 111
114 ipv4_fd = -1; 112 ipv4_fd = -1;
115 if (THISNODE->protocols & PROT_IPv4) 113 if (THISNODE->protocols & PROT_IPv4)
… …
117 ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto); 115 ipv4_fd = socket (PF_INET, SOCK_RAW, ::conf.ip_proto);
118 116
119 if (ipv4_fd < 0) 117 if (ipv4_fd < 0)
120 return -1; 118 return -1;
121 119
120 sockinfo si (THISNODE, PROT_IPv4);
121
122 if (bind (ipv4_fd, si.sav4 (), si.salenv4 ())) 122 if (bind (ipv4_fd, si.sav4 (), si.salenv4 ()))
123 { 123 {
124 slog (L_ERR, _("can't bind ipv4 socket to %s: %s"), (const char *)si, strerror (errno)); 124 slog (L_ERR, _("can't bind ipv4 socket on %s: %s"), (const char *)si, strerror (errno));
125 exit (1); 125 exit (1);
126 } 126 }
127 127
128#ifdef IP_MTU_DISCOVER 128#ifdef IP_MTU_DISCOVER
129 // this I really consider a linux bug. I am neither connected 129 // this I really consider a linux bug. I am neither connected
… …
136#endif 136#endif
137 137
138 ipv4_ev_watcher.start (ipv4_fd, POLLIN); 138 ipv4_ev_watcher.start (ipv4_fd, POLLIN);
139 } 139 }
140 140
141#if ENABLE_TCP
142 if (THISNODE->protocols & PROT_TCPv4)
143 {
144 tcpv4_fd = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP);
145
146 if (tcpv4_fd < 0)
147 return -1;
148
149 // standard daemon practise...
150 {
151 int oval = 1;
152 setsockopt (tcpv4_fd, SOL_SOCKET, SO_REUSEADDR, &oval, sizeof oval);
153 }
154
155 sockinfo si (THISNODE, PROT_TCPv4);
156
157 if (bind (tcpv4_fd, si.sav4 (), si.salenv4 ()))
158 {
159 slog (L_ERR, _("can't bind tcpv4 on %s: %s"), (const char *)si, strerror (errno));
160 exit (1);
161 }
162
163 if (listen (tcpv4_fd, 5))
164 {
165 slog (L_ERR, _("can't listen tcpv4 on %s: %s"), (const char *)si, strerror (errno));
166 exit (1);
167 }
168
169 tcpv4_ev_watcher.start (tcpv4_fd, POLLIN);
170 }
171#endif
172
141 tap = new tap_device (); 173 tap = new tap_device ();
142 if (!tap) //D this, of course, never catches 174 if (!tap) //D this, of course, never catches
143 { 175 {
144 slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname); 176 slog (L_ERR, _("cannot create network interface '%s'"), conf.ifname);
145 exit (1); 177 exit (1);
… …
152 reconnect_all (); 184 reconnect_all ();
153 185
154 return 0; 186 return 0;
155} 187}
156 188
157void 189// send a vpn packet out to other hosts
190bool
191vpn::send_vpn_packet (vpn_packet *pkt, const sockinfo &si, int tos)
192{
193 switch (si.prot)
194 {
195 case PROT_IPv4:
196 return send_ipv4_packet (pkt, si, tos);
197
198 case PROT_UDPv4:
199 return send_udpv4_packet (pkt, si, tos);
200
201#if ENABLE_TCP
202 case PROT_TCPv4:
203 return send_tcpv4_packet (pkt, si, tos);
204#endif
205
206 default:
207 slog (L_CRIT, _("%s: FATAL: trying to send packet with unsupported protocol"), (const char *)si);
208 return false;
209 }
210}
211
212bool
158vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) 213vpn::send_ipv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
159{ 214{
160 setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); 215 setsockopt (ipv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
161 sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); 216 sendto (ipv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
162}
163 217
164void 218 return true;
219}
220
221bool
165vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos) 222vpn::send_udpv4_packet (vpn_packet *pkt, const sockinfo &si, int tos)
166{ 223{
167 setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos); 224 setsockopt (udpv4_fd, SOL_IP, IP_TOS, &tos, sizeof tos);
168 sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ()); 225 sendto (udpv4_fd, &((*pkt)[0]), pkt->len, 0, si.sav4 (), si.salenv4 ());
226
227 return true;
169} 228}
170 229
171void 230void
172vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi) 231vpn::recv_vpn_packet (vpn_packet *pkt, const sockinfo &rsi)
173{ 232{
… …
180 if (src == 0 || src > conns.size () 239 if (src == 0 || src > conns.size ()
181 || dst > conns.size () 240 || dst > conns.size ()
182 || pkt->typ () >= vpn_packet::PT_MAX) 241 || pkt->typ () >= vpn_packet::PT_MAX)
183 slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"), 242 slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),
184 (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ()); 243 (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
244 else if (dst > conns.size ())
245 slog (L_WARN, _("(%s): received corrupted packet type %d (src %d, dst %d)"),
246 (const char *)rsi, pkt->typ (), pkt->src (), pkt->dst ());
185 else 247 else
186 { 248 {
187 connection *c = conns[src - 1]; 249 connection *c = conns[src - 1];
188 250
189 if (dst == 0 && !THISNODE->routerprio) 251 if (dst == 0 && !THISNODE->routerprio)
190 slog (L_WARN, _("%s(%s): received broadcast, but we are no router"), 252 slog (L_WARN, _("%s(%s): received broadcast, but we are no router"),
191 c->conf->nodename, (const char *)rsi); 253 c->conf->nodename, (const char *)rsi);
192 else if (dst != 0 && dst != THISNODE->id) 254 else if (dst != 0 && dst != THISNODE->id)
193 // FORWARDING NEEDED ;) 255 {
256 if (THISNODE->routerprio)
257 // the tos setting gets lost here. who cares.
258 conns[dst - 1]->inject_vpn_packet (pkt);
259 else
194 slog (L_WARN, 260 slog (L_WARN,
195 _("received frame for node %d ('%s') from %s, but this is node %d ('%s')"), 261 _("%s(%s): forwarding request (=> %s), but we are no router"),
262 c->conf->nodename, (const char *)rsi,
196 dst, conns[dst - 1]->conf->nodename, 263 conns[dst - 1]->conf->nodename);
197 (const char *)rsi, 264 }
198 THISNODE->id, THISNODE->nodename);
199 else 265 else
200 c->recv_vpn_packet (pkt, rsi); 266 c->recv_vpn_packet (pkt, rsi);
201 } 267 }
202} 268}
203 269
204void 270void
205vpn::udpv4_ev (short revents) 271vpn::udpv4_ev (io_watcher &w, short revents)
206{ 272{
207 if (revents & (POLLIN | POLLERR)) 273 if (revents & (POLLIN | POLLERR))
208 { 274 {
209 vpn_packet *pkt = new vpn_packet; 275 vpn_packet *pkt = new vpn_packet;
210 struct sockaddr_in sa; 276 struct sockaddr_in sa;
211 socklen_t sa_len = sizeof (sa); 277 socklen_t sa_len = sizeof (sa);
212 int len; 278 int len;
213 279
214 len = recvfrom (udpv4_fd, &((*pkt)[0]), MAXSIZE, 0, (sockaddr *)&sa, &sa_len); 280 len = recvfrom (w.fd, &((*pkt)[0]), MAXSIZE, 0, (sockaddr *)&sa, &sa_len);
215 281
216 sockinfo si(sa); 282 sockinfo si(sa, PROT_UDPv4);
217 283
218 if (len > 0) 284 if (len > 0)
219 { 285 {
220 pkt->len = len; 286 pkt->len = len;
221 287
222 recv_vpn_packet (pkt, si); 288 recv_vpn_packet (pkt, si);
223 } 289 }
224 else 290 else
225 { 291 {
226 // probably ECONNRESET or somesuch 292 // probably ECONNRESET or somesuch
227 slog (L_DEBUG, _("%s: %s"), (const char *)si, strerror (errno)); 293 slog (L_DEBUG, _("%s: fd %d, %s"), (const char *)si, w.fd, strerror (errno));
228 } 294 }
229 295
230 delete pkt; 296 delete pkt;
231 } 297 }
232 else if (revents & POLLHUP) 298 else if (revents & POLLHUP)
… …
243 exit (1); 309 exit (1);
244 } 310 }
245} 311}
246 312
247void 313void
248vpn::ipv4_ev (short revents) 314vpn::ipv4_ev (io_watcher &w, short revents)
249{ 315{
250 if (revents & (POLLIN | POLLERR)) 316 if (revents & (POLLIN | POLLERR))
251 { 317 {
252 vpn_packet *pkt = new vpn_packet; 318 vpn_packet *pkt = new vpn_packet;
253 struct sockaddr_in sa; 319 struct sockaddr_in sa;
254 socklen_t sa_len = sizeof (sa); 320 socklen_t sa_len = sizeof (sa);
255 int len; 321 int len;
256 322
257 len = recvfrom (ipv4_fd, &((*pkt)[0]), MAXSIZE, 0, (sockaddr *)&sa, &sa_len); 323 len = recvfrom (w.fd, &((*pkt)[0]), MAXSIZE, 0, (sockaddr *)&sa, &sa_len);
258 324
259 sockinfo si(sa, PROT_IPv4); 325 sockinfo si(sa, PROT_IPv4);
260 326
261 if (len > 0) 327 if (len > 0)
262 { 328 {
… …
290 exit (1); 356 exit (1);
291 } 357 }
292} 358}
293 359
294void 360void
295vpn::tap_ev (short revents) 361vpn::tap_ev (io_watcher &w, short revents)
296{ 362{
297 if (revents & POLLIN) 363 if (revents & POLLIN)
298 { 364 {
299 /* process data */ 365 /* process data */
300 tap_packet *pkt; 366 tap_packet *pkt;
… …
350 else 416 else
351 abort (); 417 abort ();
352} 418}
353 419
354void 420void
355vpn::event_cb (tstamp &ts) 421vpn::event_cb (time_watcher &w)
356{ 422{
357 if (events) 423 if (events)
358 { 424 {
359 if (events & EVENT_SHUTDOWN) 425 if (events & EVENT_SHUTDOWN)
360 { 426 {
… …
377 } 443 }
378 444
379 events = 0; 445 events = 0;
380 } 446 }
381 447
382 ts = TSTAMP_CANCEL; 448 w.at = TSTAMP_CANCEL;
383} 449}
384 450
385void 451void
386vpn::shutdown_all () 452vpn::shutdown_all ()
387{ 453{
… …
431 } 497 }
432 498
433 return router; 499 return router;
434} 500}
435 501
436void vpn::connect_request (int id) 502void vpn::send_connect_request (int id)
437{ 503{
438 connection *c = find_router (); 504 connection *c = find_router ();
439 505
440 if (c) 506 if (c)
441 c->connect_request (id); 507 c->send_connect_request (id);
442 //else // does not work, because all others must connect to the same router 508 else
443 // // no router found, aggressively connect to all routers 509 // no router found, aggressively connect to all routers
444 // for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i) 510 for (conns_vector::iterator i = conns.begin (); i != conns.end (); ++i)
445 // if ((*i)->conf->routerprio) 511 if ((*i)->conf->routerprio)
446 // (*i)->establish_connection (); 512 (*i)->establish_connection ();
447} 513}
448 514
449void 515void
450connection::dump_status () 516connection::dump_status ()
451{ 517{
… …
468 534
469 slog (L_NOTICE, _("END status dump")); 535 slog (L_NOTICE, _("END status dump"));
470} 536}
471 537
472vpn::vpn (void) 538vpn::vpn (void)
539: event(this, &vpn::event_cb)
473: udpv4_ev_watcher(this, &vpn::udpv4_ev) 540, udpv4_ev_watcher(this, &vpn::udpv4_ev)
474, ipv4_ev_watcher(this, &vpn::ipv4_ev) 541, ipv4_ev_watcher (this, &vpn::ipv4_ev)
475, tap_ev_watcher(this, &vpn::tap_ev) 542, tap_ev_watcher (this, &vpn::tap_ev)
476, event(this, &vpn::event_cb) 543#if ENABLE_TCP
544, tcpv4_ev_watcher(this, &vpn::tcpv4_ev)
545#endif
477{ 546{
478} 547}
479 548
480vpn::~vpn () 549vpn::~vpn ()
481{ 550{

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