Commit | Line | Data |
---|---|---|
9d3a4132 SE |
1 | #include "secnet.h" |
2 | #include "util.h" | |
3 | #include "netlink.h" | |
4 | #include <stdio.h> | |
5 | #include <string.h> | |
090dbeef | 6 | #include <errno.h> |
9d3a4132 SE |
7 | #include <unistd.h> |
8 | #include <fcntl.h> | |
9 | #include <sys/ioctl.h> | |
ff05a229 SE |
10 | #include <sys/utsname.h> |
11 | #include <sys/socket.h> | |
9d3a4132 | 12 | |
ff05a229 SE |
13 | #ifdef HAVE_NET_IF_H |
14 | #include <net/if.h> | |
9d3a4132 | 15 | #ifdef HAVE_LINUX_IF_H |
9d3a4132 | 16 | #include <linux/if_tun.h> |
ff05a229 | 17 | #define LINUX_TUN_SUPPORTED |
9d3a4132 | 18 | #endif |
ff05a229 SE |
19 | #endif |
20 | ||
21 | #ifdef HAVE_NET_ROUTE_H | |
22 | #include <net/route.h> | |
23 | #endif | |
24 | ||
25 | #if defined(HAVE_STROPTS_H) && defined(HAVE_SYS_SOCKIO_H) && \ | |
26 | defined(HAVE_NET_IF_TUN_H) | |
27 | #define HAVE_TUN_STREAMS | |
28 | #endif | |
29 | ||
30 | #ifdef HAVE_TUN_STREAMS | |
31 | #include <stropts.h> | |
32 | #include <sys/sockio.h> | |
33 | #include <net/if_tun.h> | |
34 | #endif | |
35 | ||
36 | #define TUN_FLAVOUR_GUESS 0 | |
37 | #define TUN_FLAVOUR_BSD 1 | |
38 | #define TUN_FLAVOUR_LINUX 2 | |
39 | #define TUN_FLAVOUR_STREAMS 3 | |
40 | ||
41 | static struct flagstr flavours[]={ | |
42 | {"guess", TUN_FLAVOUR_GUESS}, | |
43 | {"bsd", TUN_FLAVOUR_BSD}, | |
44 | {"BSD", TUN_FLAVOUR_BSD}, | |
45 | {"linux", TUN_FLAVOUR_LINUX}, | |
46 | {"streams", TUN_FLAVOUR_STREAMS}, | |
47 | {"STREAMS", TUN_FLAVOUR_STREAMS}, | |
48 | {NULL, 0} | |
49 | }; | |
9d3a4132 | 50 | |
ff05a229 SE |
51 | #define TUN_CONFIG_GUESS 0 |
52 | #define TUN_CONFIG_IOCTL 1 | |
53 | #define TUN_CONFIG_BSD 2 | |
54 | #define TUN_CONFIG_LINUX 3 | |
55 | #define TUN_CONFIG_SOLARIS25 4 | |
56 | ||
57 | static struct flagstr config_types[]={ | |
58 | {"guess", TUN_CONFIG_GUESS}, | |
59 | {"ioctl", TUN_CONFIG_IOCTL}, | |
60 | {"bsd", TUN_CONFIG_BSD}, | |
61 | {"BSD", TUN_CONFIG_BSD}, | |
62 | {"linux", TUN_CONFIG_LINUX}, | |
63 | {"solaris-2.5", TUN_CONFIG_SOLARIS25}, | |
64 | {NULL, 0} | |
65 | }; | |
9d3a4132 SE |
66 | |
67 | /* Connection to the kernel through the universal TUN/TAP driver */ | |
68 | ||
69 | struct tun { | |
70 | struct netlink nl; | |
71 | int fd; | |
fe5e9cc4 SE |
72 | cstring_t device_path; |
73 | cstring_t ip_path; | |
9d3a4132 | 74 | string_t interface_name; |
fe5e9cc4 | 75 | cstring_t ifconfig_path; |
ff05a229 | 76 | uint32_t ifconfig_type; |
fe5e9cc4 | 77 | cstring_t route_path; |
ff05a229 SE |
78 | uint32_t route_type; |
79 | uint32_t tun_flavour; | |
80 | bool_t search_for_if; /* Applies to tun-BSD only */ | |
9d3a4132 SE |
81 | struct buffer_if *buff; /* We receive packets into here |
82 | and send them to the netlink code. */ | |
83 | netlink_deliver_fn *netlink_to_tunnel; | |
84 | }; | |
85 | ||
fe5e9cc4 | 86 | static cstring_t tun_flavour_str(uint32_t flavour) |
ff05a229 SE |
87 | { |
88 | switch (flavour) { | |
89 | case TUN_FLAVOUR_GUESS: return "guess"; | |
90 | case TUN_FLAVOUR_BSD: return "BSD"; | |
91 | case TUN_FLAVOUR_LINUX: return "linux"; | |
92 | case TUN_FLAVOUR_STREAMS: return "STREAMS"; | |
93 | default: return "unknown"; | |
94 | } | |
95 | } | |
96 | ||
9d3a4132 | 97 | static int tun_beforepoll(void *sst, struct pollfd *fds, int *nfds_io, |
90a39563 | 98 | int *timeout_io) |
9d3a4132 SE |
99 | { |
100 | struct tun *st=sst; | |
101 | *nfds_io=1; | |
102 | fds[0].fd=st->fd; | |
fe5e9cc4 | 103 | fds[0].events=POLLIN; |
9d3a4132 SE |
104 | return 0; |
105 | } | |
106 | ||
90a39563 | 107 | static void tun_afterpoll(void *sst, struct pollfd *fds, int nfds) |
9d3a4132 SE |
108 | { |
109 | struct tun *st=sst; | |
110 | int l; | |
111 | ||
7138d0c5 | 112 | if (nfds==0) return; |
9d3a4132 SE |
113 | if (fds[0].revents&POLLERR) { |
114 | printf("tun_afterpoll: hup!\n"); | |
115 | } | |
116 | if (fds[0].revents&POLLIN) { | |
117 | BUF_ALLOC(st->buff,"tun_afterpoll"); | |
3abd18e8 | 118 | buffer_init(st->buff,calculate_max_start_pad()); |
92795040 | 119 | l=read(st->fd, st->buff->start, buf_remaining_space(st->buff)); |
9d3a4132 SE |
120 | if (l<0) { |
121 | fatal_perror("tun_afterpoll: read()"); | |
122 | } | |
123 | if (l==0) { | |
4f5e39ec | 124 | fatal("tun_afterpoll: read()=0; device gone away?"); |
9d3a4132 SE |
125 | } |
126 | if (l>0) { | |
127 | st->buff->size=l; | |
469fd1d9 | 128 | st->netlink_to_tunnel(&st->nl,st->buff); |
9d3a4132 SE |
129 | BUF_ASSERT_FREE(st->buff); |
130 | } | |
131 | } | |
132 | } | |
133 | ||
469fd1d9 | 134 | static void tun_deliver_to_kernel(void *sst, struct buffer_if *buf) |
9d3a4132 SE |
135 | { |
136 | struct tun *st=sst; | |
090dbeef | 137 | ssize_t rc; |
9d3a4132 SE |
138 | |
139 | BUF_ASSERT_USED(buf); | |
090dbeef RK |
140 | |
141 | /* Log errors, so we can tell what's going on, but only once a | |
142 | minute, so we don't flood the logs. Short writes count as | |
143 | errors. */ | |
144 | rc = write(st->fd,buf->start,buf->size); | |
145 | if(rc != buf->size) { | |
146 | static struct timeval last_report; | |
147 | if(tv_now_global.tv_sec >= last_report.tv_sec + 60) { | |
148 | if(rc < 0) | |
149 | Message(M_WARNING, | |
150 | "failed to deliver packet to tun device: %s\n", | |
151 | strerror(errno)); | |
152 | else | |
153 | Message(M_WARNING, | |
154 | "truncated packet delivered to tun device\n"); | |
155 | last_report = tv_now_global; | |
156 | } | |
157 | } | |
9d3a4132 SE |
158 | BUF_FREE(buf); |
159 | } | |
160 | ||
d3fe100d | 161 | static bool_t tun_set_route(void *sst, struct netlink_client *routes) |
9d3a4132 SE |
162 | { |
163 | struct tun *st=sst; | |
164 | string_t network, mask, secnetaddr; | |
d3fe100d | 165 | struct subnet_list *nets; |
1caa23ff | 166 | int32_t i; |
ff05a229 | 167 | int fd=-1; |
efacf9e0 | 168 | bool_t up; |
ff05a229 | 169 | |
efacf9e0 ST |
170 | if (routes->options & OPT_SOFTROUTE) |
171 | up = routes->up; | |
172 | else | |
173 | up = routes->link_quality > LINK_QUALITY_UNUSED; | |
174 | ||
175 | if (up == routes->kup) return False; | |
ff05a229 SE |
176 | if (st->route_type==TUN_CONFIG_IOCTL) { |
177 | if (st->tun_flavour==TUN_FLAVOUR_STREAMS) { | |
178 | fd=open(st->ip_path,O_RDWR); | |
179 | if (fd<0) { | |
180 | fatal_perror("tun_set_route: can't open %s",st->ip_path); | |
181 | } | |
182 | } else { | |
183 | fd=socket(PF_INET, SOCK_DGRAM, IPPROTO_IP); | |
184 | if (fd<0) { | |
185 | fatal_perror("tun_set_route: socket()"); | |
186 | } | |
187 | } | |
188 | } | |
189 | nets=routes->subnets; | |
190 | secnetaddr=ipaddr_to_string(st->nl.secnet_address); | |
191 | for (i=0; i<nets->entries; i++) { | |
192 | network=ipaddr_to_string(nets->list[i].prefix); | |
193 | mask=ipaddr_to_string(nets->list[i].mask); | |
194 | Message(M_INFO,"%s: %s route %s/%d %s kernel routing table\n", | |
efacf9e0 ST |
195 | st->nl.name,up?"adding":"deleting",network, |
196 | nets->list[i].len,up?"to":"from"); | |
ff05a229 SE |
197 | switch (st->route_type) { |
198 | case TUN_CONFIG_LINUX: | |
efacf9e0 | 199 | sys_cmd(st->route_path,"route",up?"add":"del", |
ff05a229 SE |
200 | "-net",network,"netmask",mask, |
201 | "gw",secnetaddr,(char *)0); | |
202 | break; | |
203 | case TUN_CONFIG_BSD: | |
efacf9e0 | 204 | sys_cmd(st->route_path,"route",up?"add":"del", |
ff05a229 SE |
205 | "-net",network,secnetaddr,mask,(char *)0); |
206 | break; | |
207 | case TUN_CONFIG_SOLARIS25: | |
efacf9e0 | 208 | sys_cmd(st->route_path,"route",up?"add":"del", |
ff05a229 SE |
209 | network,secnetaddr,(char *)0); |
210 | break; | |
211 | case TUN_CONFIG_IOCTL: | |
212 | { | |
ea7ec970 SE |
213 | /* darwin rtentry has a different format, use /sbin/route instead */ |
214 | #if HAVE_NET_ROUTE_H && ! __APPLE__ | |
ff05a229 SE |
215 | struct rtentry rt; |
216 | struct sockaddr_in *sa; | |
217 | int action; | |
218 | ||
076bb54e | 219 | FILLZERO(rt); |
ff05a229 SE |
220 | sa=(struct sockaddr_in *)&rt.rt_dst; |
221 | sa->sin_family=AF_INET; | |
222 | sa->sin_addr.s_addr=htonl(nets->list[i].prefix); | |
223 | sa=(struct sockaddr_in *)&rt.rt_genmask; | |
224 | sa->sin_family=AF_INET; | |
225 | sa->sin_addr.s_addr=htonl(nets->list[i].mask); | |
226 | sa=(struct sockaddr_in *)&rt.rt_gateway; | |
227 | sa->sin_family=AF_INET; | |
228 | sa->sin_addr.s_addr=htonl(st->nl.secnet_address); | |
229 | rt.rt_flags=RTF_UP|RTF_GATEWAY; | |
efacf9e0 | 230 | action=up?SIOCADDRT:SIOCDELRT; |
ff05a229 SE |
231 | if (ioctl(fd,action,&rt)<0) { |
232 | fatal_perror("tun_set_route: ioctl()"); | |
233 | } | |
234 | #else | |
4f5e39ec | 235 | fatal("tun_set_route: ioctl method not supported"); |
ff05a229 | 236 | #endif |
d3fe100d | 237 | } |
ff05a229 SE |
238 | break; |
239 | default: | |
4f5e39ec | 240 | fatal("tun_set_route: unsupported route command type"); |
ff05a229 SE |
241 | break; |
242 | } | |
ff05a229 | 243 | } |
ff05a229 SE |
244 | if (st->route_type==TUN_CONFIG_IOCTL) { |
245 | close(fd); | |
9d3a4132 | 246 | } |
efacf9e0 | 247 | routes->kup=up; |
ff05a229 | 248 | return True; |
9d3a4132 SE |
249 | } |
250 | ||
251 | static void tun_phase_hook(void *sst, uint32_t newphase) | |
252 | { | |
253 | struct tun *st=sst; | |
254 | string_t hostaddr,secnetaddr; | |
7c006408 | 255 | char mtu[6]; |
d3fe100d | 256 | struct netlink_client *r; |
9d3a4132 | 257 | |
ff05a229 | 258 | if (st->tun_flavour==TUN_FLAVOUR_BSD) { |
9d3a4132 SE |
259 | if (st->search_for_if) { |
260 | string_t dname; | |
261 | int i; | |
262 | ||
9d3a4132 SE |
263 | dname=safe_malloc(strlen(st->device_path)+4,"tun_old_apply"); |
264 | st->interface_name=safe_malloc(8,"tun_phase_hook"); | |
265 | ||
266 | for (i=0; i<255; i++) { | |
267 | sprintf(dname,"%s%d",st->device_path,i); | |
268 | if ((st->fd=open(dname,O_RDWR))>0) { | |
269 | sprintf(st->interface_name,"tun%d",i); | |
270 | Message(M_INFO,"%s: allocated network interface %s " | |
271 | "through %s\n",st->nl.name,st->interface_name, | |
272 | dname); | |
273 | break; | |
274 | } | |
275 | } | |
276 | if (st->fd==-1) { | |
4f5e39ec | 277 | fatal("%s: unable to open any TUN device (%s...)", |
9d3a4132 SE |
278 | st->nl.name,st->device_path); |
279 | } | |
280 | } else { | |
281 | st->fd=open(st->device_path,O_RDWR); | |
282 | if (st->fd==-1) { | |
283 | fatal_perror("%s: unable to open TUN device file %s", | |
284 | st->nl.name,st->device_path); | |
285 | } | |
286 | } | |
ff05a229 SE |
287 | } else if (st->tun_flavour==TUN_FLAVOUR_LINUX) { |
288 | #ifdef LINUX_TUN_SUPPORTED | |
9d3a4132 SE |
289 | struct ifreq ifr; |
290 | ||
291 | /* New TUN interface: open the device, then do ioctl TUNSETIFF | |
292 | to set or find out the network interface name. */ | |
293 | st->fd=open(st->device_path,O_RDWR); | |
294 | if (st->fd==-1) { | |
295 | fatal_perror("%s: can't open device file %s",st->nl.name, | |
296 | st->device_path); | |
297 | } | |
076bb54e | 298 | FILLZERO(ifr); |
9d3a4132 SE |
299 | ifr.ifr_flags = IFF_TUN | IFF_NO_PI; /* Just send/receive IP packets, |
300 | no extra headers */ | |
301 | if (st->interface_name) | |
302 | strncpy(ifr.ifr_name,st->interface_name,IFNAMSIZ); | |
9d3a4132 SE |
303 | if (ioctl(st->fd,TUNSETIFF,&ifr)<0) { |
304 | fatal_perror("%s: ioctl(TUNSETIFF)",st->nl.name); | |
305 | } | |
306 | if (!st->interface_name) { | |
307 | st->interface_name=safe_malloc(strlen(ifr.ifr_name)+1,"tun_apply"); | |
308 | strcpy(st->interface_name,ifr.ifr_name); | |
309 | Message(M_INFO,"%s: allocated network interface %s\n",st->nl.name, | |
310 | st->interface_name); | |
311 | } | |
312 | #else | |
4f5e39ec | 313 | fatal("tun_phase_hook: TUN_FLAVOUR_LINUX unexpected"); |
ff05a229 SE |
314 | #endif /* LINUX_TUN_SUPPORTED */ |
315 | } else if (st->tun_flavour==TUN_FLAVOUR_STREAMS) { | |
316 | #ifdef HAVE_TUN_STREAMS | |
317 | int tun_fd, if_fd, ppa=-1, ip_fd; | |
318 | ||
319 | if ((ip_fd=open(st->ip_path, O_RDWR)) < 0) { | |
320 | fatal_perror("%s: can't open %s",st->nl.name,st->ip_path); | |
321 | } | |
322 | if ((tun_fd=open(st->device_path,O_RDWR)) < 0) { | |
323 | fatal_perror("%s: can't open %s",st->nl.name,st->device_path); | |
324 | } | |
325 | if ((ppa=ioctl(tun_fd,TUNNEWPPA,ppa)) < 0) { | |
326 | fatal_perror("%s: can't assign new interface"); | |
327 | } | |
328 | if ((if_fd=open(st->device_path,O_RDWR)) < 0) { | |
329 | fatal_perror("%s: can't open %s (2)",st->nl.name,st->device_path); | |
330 | } | |
331 | if (ioctl(if_fd,I_PUSH,"ip") < 0) { | |
332 | fatal_perror("%s: can't push IP module",st->nl.name); | |
333 | } | |
334 | if (ioctl(if_fd,IF_UNITSEL,(char *)&ppa) < 0) { | |
335 | fatal_perror("%s: can't set ppa %d",st->nl.name,ppa); | |
336 | } | |
337 | if (ioctl(ip_fd, I_LINK, if_fd) < 0) { | |
338 | fatal_perror("%s: can't link TUN device to IP",st->nl.name); | |
339 | } | |
340 | st->interface_name=safe_malloc(10,"tun_apply"); | |
341 | sprintf(st->interface_name,"tun%d",ppa); | |
342 | st->fd=tun_fd; | |
343 | #else | |
4f5e39ec | 344 | fatal("tun_phase_hook: TUN_FLAVOUR_STREAMS unexpected"); |
ff05a229 SE |
345 | #endif /* HAVE_TUN_STREAMS */ |
346 | } else { | |
4f5e39ec | 347 | fatal("tun_phase_hook: unknown flavour of TUN"); |
9d3a4132 SE |
348 | } |
349 | /* All the networks we'll be using have been registered. Invoke ifconfig | |
350 | to set the TUN device's address, and route to add routes to all | |
351 | our networks. */ | |
352 | ||
091433c6 | 353 | hostaddr=ipaddr_to_string(st->nl.local_address); |
9d3a4132 | 354 | secnetaddr=ipaddr_to_string(st->nl.secnet_address); |
c1d2109a | 355 | snprintf(mtu,sizeof(mtu),"%d",st->nl.mtu); |
9d3a4132 SE |
356 | mtu[5]=0; |
357 | ||
fe5e9cc4 | 358 | switch (st->ifconfig_type) { |
ff05a229 SE |
359 | case TUN_CONFIG_LINUX: |
360 | sys_cmd(st->ifconfig_path,"ifconfig",st->interface_name, | |
361 | hostaddr,"netmask","255.255.255.255","-broadcast", | |
362 | "-multicast", | |
363 | "pointopoint",secnetaddr,"mtu",mtu,"up",(char *)0); | |
364 | break; | |
365 | case TUN_CONFIG_BSD: | |
366 | sys_cmd(st->ifconfig_path,"ifconfig",st->interface_name, | |
367 | hostaddr,"netmask","255.255.255.255", | |
368 | secnetaddr,"mtu",mtu,"up",(char *)0); | |
369 | break; | |
370 | case TUN_CONFIG_SOLARIS25: | |
371 | sys_cmd(st->ifconfig_path,"ifconfig",st->interface_name, | |
372 | hostaddr,secnetaddr,"mtu",mtu,"up",(char *)0); | |
373 | break; | |
374 | case TUN_CONFIG_IOCTL: | |
ea7ec970 | 375 | #if HAVE_NET_IF_H && ! __APPLE__ |
ff05a229 SE |
376 | { |
377 | int fd; | |
378 | struct ifreq ifr; | |
379 | struct sockaddr_in *sa; | |
380 | fd=socket(PF_INET, SOCK_DGRAM, IPPROTO_IP); | |
381 | ||
382 | /* Interface address */ | |
383 | strncpy(ifr.ifr_name,st->interface_name,IFNAMSIZ); | |
384 | sa=(struct sockaddr_in *)&ifr.ifr_addr; | |
076bb54e | 385 | FILLZERO(*sa); |
ff05a229 | 386 | sa->sin_family=AF_INET; |
091433c6 | 387 | sa->sin_addr.s_addr=htonl(st->nl.local_address); |
ff05a229 SE |
388 | if (ioctl(fd,SIOCSIFADDR, &ifr)!=0) { |
389 | fatal_perror("tun_apply: SIOCSIFADDR"); | |
390 | } | |
391 | #ifdef SIOCSIFNETMASK | |
392 | /* Netmask */ | |
393 | strncpy(ifr.ifr_name,st->interface_name,IFNAMSIZ); | |
394 | sa=(struct sockaddr_in *)&ifr.ifr_netmask; | |
076bb54e | 395 | FILLZERO(*sa); |
ff05a229 SE |
396 | sa->sin_family=AF_INET; |
397 | sa->sin_addr.s_addr=htonl(0xffffffff); | |
398 | if (ioctl(fd,SIOCSIFNETMASK, &ifr)!=0) { | |
399 | fatal_perror("tun_apply: SIOCSIFNETMASK"); | |
400 | } | |
401 | #endif | |
402 | /* Destination address (point-to-point) */ | |
403 | strncpy(ifr.ifr_name,st->interface_name,IFNAMSIZ); | |
404 | sa=(struct sockaddr_in *)&ifr.ifr_dstaddr; | |
076bb54e | 405 | FILLZERO(*sa); |
ff05a229 SE |
406 | sa->sin_family=AF_INET; |
407 | sa->sin_addr.s_addr=htonl(st->nl.secnet_address); | |
408 | if (ioctl(fd,SIOCSIFDSTADDR, &ifr)!=0) { | |
409 | fatal_perror("tun_apply: SIOCSIFDSTADDR"); | |
410 | } | |
411 | /* MTU */ | |
412 | strncpy(ifr.ifr_name,st->interface_name,IFNAMSIZ); | |
413 | ifr.ifr_mtu=st->nl.mtu; | |
414 | if (ioctl(fd,SIOCSIFMTU, &ifr)!=0) { | |
415 | fatal_perror("tun_apply: SIOCSIFMTU"); | |
416 | } | |
417 | /* Flags */ | |
418 | strncpy(ifr.ifr_name,st->interface_name,IFNAMSIZ); | |
419 | ifr.ifr_flags=IFF_UP|IFF_POINTOPOINT|IFF_RUNNING|IFF_NOARP; | |
420 | if (ioctl(fd,SIOCSIFFLAGS, &ifr)!=0) { | |
421 | fatal_perror("tun_apply: SIOCSIFFLAGS"); | |
422 | } | |
9d3a4132 | 423 | |
ff05a229 SE |
424 | close(fd); |
425 | } | |
426 | #else | |
4f5e39ec | 427 | fatal("tun_apply: ifconfig by ioctl() not supported"); |
ff05a229 SE |
428 | #endif /* HAVE_NET_IF_H */ |
429 | break; | |
430 | default: | |
4f5e39ec | 431 | fatal("tun_apply: unsupported ifconfig method"); |
ff05a229 SE |
432 | break; |
433 | } | |
434 | ||
d3fe100d SE |
435 | for (r=st->nl.clients; r; r=r->next) { |
436 | tun_set_route(st,r); | |
9d3a4132 SE |
437 | } |
438 | ||
439 | /* Register for poll() */ | |
440 | register_for_poll(st, tun_beforepoll, tun_afterpoll, 1, st->nl.name); | |
441 | } | |
442 | ||
ff05a229 SE |
443 | static list_t *tun_create(closure_t *self, struct cloc loc, dict_t *context, |
444 | list_t *args,uint32_t default_flavour) | |
9d3a4132 SE |
445 | { |
446 | struct tun *st; | |
447 | item_t *item; | |
448 | dict_t *dict; | |
ff05a229 | 449 | string_t flavour,type; |
9d3a4132 SE |
450 | |
451 | st=safe_malloc(sizeof(*st),"tun_apply"); | |
452 | ||
453 | /* First parameter must be a dict */ | |
454 | item=list_elem(args,0); | |
455 | if (!item || item->type!=t_dict) | |
456 | cfgfatal(loc,"tun","parameter must be a dictionary\n"); | |
457 | ||
458 | dict=item->data.dict; | |
459 | ||
460 | st->netlink_to_tunnel= | |
461 | netlink_init(&st->nl,st,loc,dict, | |
462 | "netlink-tun",tun_set_route,tun_deliver_to_kernel); | |
463 | ||
ff05a229 SE |
464 | flavour=dict_read_string(dict,"flavour",False,"tun-netlink",loc); |
465 | if (flavour) | |
466 | st->tun_flavour=string_to_word(flavour,loc,flavours,"tun-flavour"); | |
467 | else | |
468 | st->tun_flavour=default_flavour; | |
469 | ||
9d3a4132 | 470 | st->device_path=dict_read_string(dict,"device",False,"tun-netlink",loc); |
ff05a229 | 471 | st->ip_path=dict_read_string(dict,"ip-path",False,"tun-netlink",loc); |
9d3a4132 SE |
472 | st->interface_name=dict_read_string(dict,"interface",False, |
473 | "tun-netlink",loc); | |
ff05a229 SE |
474 | st->search_for_if=dict_read_bool(dict,"interface-search",False, |
475 | "tun-netlink",loc,st->device_path==NULL); | |
476 | ||
477 | type=dict_read_string(dict,"ifconfig-type",False,"tun-netlink",loc); | |
478 | if (type) st->ifconfig_type=string_to_word(type,loc,config_types, | |
479 | "ifconfig-type"); | |
480 | else st->ifconfig_type=TUN_CONFIG_GUESS; | |
481 | st->ifconfig_path=dict_read_string(dict,"ifconfig-path",False, | |
482 | "tun-netlink",loc); | |
483 | ||
484 | type=dict_read_string(dict,"route-type",False,"tun-netlink",loc); | |
485 | if (type) st->route_type=string_to_word(type,loc,config_types, | |
486 | "route-type"); | |
487 | else st->route_type=TUN_CONFIG_GUESS; | |
488 | st->route_path=dict_read_string(dict,"route-path",False,"tun-netlink",loc); | |
9d3a4132 | 489 | |
9d3a4132 SE |
490 | st->buff=find_cl_if(dict,"buffer",CL_BUFFER,True,"tun-netlink",loc); |
491 | ||
ff05a229 SE |
492 | if (st->tun_flavour==TUN_FLAVOUR_GUESS) { |
493 | /* If we haven't been told what type of TUN we're using, take | |
494 | a guess based on the system details. */ | |
495 | struct utsname u; | |
496 | if (uname(&u)<0) { | |
497 | fatal_perror("tun_create: uname"); | |
498 | } | |
499 | if (strcmp(u.sysname,"Linux")==0) { | |
621c2861 | 500 | st->tun_flavour=TUN_FLAVOUR_LINUX; |
ff05a229 SE |
501 | } else if (strcmp(u.sysname,"SunOS")==0) { |
502 | st->tun_flavour=TUN_FLAVOUR_STREAMS; | |
ea7ec970 SE |
503 | } else if (strcmp(u.sysname,"FreeBSD")==0 |
504 | || strcmp(u.sysname,"Darwin")==0) { | |
ff05a229 SE |
505 | st->tun_flavour=TUN_FLAVOUR_BSD; |
506 | } | |
507 | } | |
508 | if (st->tun_flavour==TUN_FLAVOUR_GUESS) { | |
509 | cfgfatal(loc,"tun","cannot guess which type of TUN is in use; " | |
510 | "specify the flavour explicitly\n"); | |
511 | } | |
9d3a4132 | 512 | |
ff05a229 SE |
513 | if (st->ifconfig_type==TUN_CONFIG_GUESS) { |
514 | switch (st->tun_flavour) { | |
515 | case TUN_FLAVOUR_LINUX: | |
516 | st->ifconfig_type=TUN_CONFIG_IOCTL; | |
517 | break; | |
518 | case TUN_FLAVOUR_BSD: | |
ea7ec970 | 519 | #if __linux__ |
4f5e39ec SE |
520 | /* XXX on Linux we still want TUN_CONFIG_IOCTL. Perhaps we can |
521 | use this on BSD too. */ | |
522 | st->ifconfig_type=TUN_CONFIG_IOCTL; | |
ea7ec970 SE |
523 | #else |
524 | st->ifconfig_type=TUN_CONFIG_BSD; | |
525 | #endif | |
ff05a229 SE |
526 | break; |
527 | case TUN_FLAVOUR_STREAMS: | |
528 | st->ifconfig_type=TUN_CONFIG_BSD; | |
529 | break; | |
530 | } | |
531 | } | |
532 | if (st->route_type==TUN_CONFIG_GUESS) | |
533 | st->route_type=st->ifconfig_type; | |
9d3a4132 | 534 | |
ff05a229 SE |
535 | if (st->ifconfig_type==TUN_CONFIG_GUESS) { |
536 | cfgfatal(loc,"tun","cannot guess which ifconfig method to use\n"); | |
537 | } | |
538 | if (st->route_type==TUN_CONFIG_GUESS) { | |
539 | cfgfatal(loc,"tun","cannot guess which route method to use\n"); | |
540 | } | |
9d3a4132 | 541 | |
ff05a229 SE |
542 | if (st->ifconfig_type==TUN_CONFIG_IOCTL && st->ifconfig_path) { |
543 | cfgfatal(loc,"tun","ifconfig-type \"ioctl\" is incompatible with " | |
544 | "ifconfig-path\n"); | |
545 | } | |
546 | if (st->route_type==TUN_CONFIG_IOCTL && st->route_path) { | |
547 | cfgfatal(loc,"tun","route-type \"ioctl\" is incompatible with " | |
548 | "route-path\n"); | |
549 | } | |
9d3a4132 | 550 | |
ff05a229 SE |
551 | Message(M_DEBUG_CONFIG,"%s: tun flavour %s\n",st->nl.name, |
552 | tun_flavour_str(st->tun_flavour)); | |
553 | switch (st->tun_flavour) { | |
554 | case TUN_FLAVOUR_BSD: | |
555 | if (!st->device_path) st->device_path="/dev/tun"; | |
556 | break; | |
557 | case TUN_FLAVOUR_LINUX: | |
558 | if (!st->device_path) st->device_path="/dev/net/tun"; | |
559 | break; | |
560 | case TUN_FLAVOUR_STREAMS: | |
561 | if (!st->device_path) st->device_path="/dev/tun"; | |
562 | if (st->interface_name) cfgfatal(loc,"tun","interface name cannot " | |
563 | "be specified with STREAMS TUN\n"); | |
564 | break; | |
565 | } | |
9d3a4132 | 566 | |
ff05a229 | 567 | if (!st->ip_path) st->ip_path="/dev/ip"; |
9d3a4132 SE |
568 | if (!st->ifconfig_path) st->ifconfig_path="ifconfig"; |
569 | if (!st->route_path) st->route_path="route"; | |
ff05a229 SE |
570 | |
571 | #ifndef HAVE_TUN_STREAMS | |
572 | if (st->tun_flavour==TUN_FLAVOUR_STREAMS) { | |
573 | cfgfatal(loc,"tun","TUN flavour STREAMS unsupported in this build " | |
574 | "of secnet\n"); | |
575 | } | |
576 | #endif | |
577 | #ifndef LINUX_TUN_SUPPORTED | |
578 | if (st->tun_flavour==TUN_FLAVOUR_LINUX) { | |
579 | cfgfatal(loc,"tun","TUN flavour LINUX unsupported in this build " | |
580 | "of secnet\n"); | |
581 | } | |
582 | #endif | |
9d3a4132 SE |
583 | |
584 | /* Old TUN interface: the network interface name depends on which | |
585 | /dev/tunX file we open. If 'interface-search' is set to true, treat | |
586 | 'device' as the prefix and try numbers from 0--255. If it's set | |
587 | to false, treat 'device' as the whole name, and require than an | |
588 | appropriate interface name be specified. */ | |
ff05a229 SE |
589 | if (st->tun_flavour==TUN_FLAVOUR_BSD) { |
590 | if (st->search_for_if && st->interface_name) { | |
591 | cfgfatal(loc,"tun","you may not specify an interface name " | |
592 | "in interface-search mode\n"); | |
593 | } | |
594 | if (!st->search_for_if && !st->interface_name) { | |
595 | cfgfatal(loc,"tun","you must specify an interface name " | |
596 | "when you explicitly specify a TUN device file\n"); | |
597 | } | |
9d3a4132 SE |
598 | } |
599 | ||
9d3a4132 SE |
600 | add_hook(PHASE_GETRESOURCES,tun_phase_hook,st); |
601 | ||
602 | return new_closure(&st->nl.cl); | |
603 | } | |
604 | ||
ff05a229 SE |
605 | static list_t *tun_apply(closure_t *self, struct cloc loc, dict_t *context, |
606 | list_t *args) | |
607 | { | |
608 | return tun_create(self,loc,context,args,TUN_FLAVOUR_GUESS); | |
609 | } | |
610 | ||
611 | static list_t *tun_bsd_apply(closure_t *self, struct cloc loc, dict_t *context, | |
612 | list_t *args) | |
613 | { | |
614 | Message(M_WARNING,"(%s,%d): obsolete use of tun-old; replace with tun " | |
615 | "and specify flavour \"bsd\".\n",loc.file,loc.line); | |
616 | return tun_create(self,loc,context,args,TUN_FLAVOUR_BSD); | |
617 | } | |
618 | ||
9d3a4132 SE |
619 | void tun_module(dict_t *dict) |
620 | { | |
9d3a4132 | 621 | add_closure(dict,"tun",tun_apply); |
ff05a229 | 622 | add_closure(dict,"tun-old",tun_bsd_apply); |
9d3a4132 | 623 | } |