]>
git.proxmox.com Git - mirror_iproute2.git/blob - ip/iptunnel.c
2 * iptunnel.c "ip tunnel"
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
17 #include <sys/types.h>
18 #include <sys/socket.h>
19 #include <arpa/inet.h>
20 #include <sys/ioctl.h>
22 #include <net/if_arp.h>
24 #include <linux/if_tunnel.h>
28 #include "ip_common.h"
31 static void usage(void) __attribute__((noreturn
));
33 static void usage(void)
35 fprintf(stderr
, "Usage: ip tunnel { add | change | del | show | prl | 6rd } [ NAME ]\n");
36 fprintf(stderr
, " [ mode { ipip | gre | sit | isatap } ] [ remote ADDR ] [ local ADDR ]\n");
37 fprintf(stderr
, " [ [i|o]seq ] [ [i|o]key KEY ] [ [i|o]csum ]\n");
38 fprintf(stderr
, " [ prl-default ADDR ] [ prl-nodefault ADDR ] [ prl-delete ADDR ]\n");
39 fprintf(stderr
, " [ 6rd-prefix ADDR ] [ 6rd-relay_prefix ADDR ] [ 6rd-reset ]\n");
40 fprintf(stderr
, " [ ttl TTL ] [ tos TOS ] [ [no]pmtudisc ] [ dev PHYS_DEV ]\n");
41 fprintf(stderr
, "\n");
42 fprintf(stderr
, "Where: NAME := STRING\n");
43 fprintf(stderr
, " ADDR := { IP_ADDRESS | any }\n");
44 fprintf(stderr
, " TOS := { NUMBER | inherit }\n");
45 fprintf(stderr
, " TTL := { 1..255 | inherit }\n");
46 fprintf(stderr
, " KEY := { DOTTED_QUAD | NUMBER }\n");
50 static int parse_args(int argc
, char **argv
, int cmd
, struct ip_tunnel_parm
*p
)
53 char medium
[IFNAMSIZ
];
56 memset(p
, 0, sizeof(*p
));
57 memset(&medium
, 0, sizeof(medium
));
62 #define IP_DF 0x4000 /* Flag: "Don't Fragment" */
64 p
->iph
.frag_off
= htons(IP_DF
);
67 if (strcmp(*argv
, "mode") == 0) {
69 if (strcmp(*argv
, "ipip") == 0 ||
70 strcmp(*argv
, "ip/ip") == 0) {
71 if (p
->iph
.protocol
&& p
->iph
.protocol
!= IPPROTO_IPIP
) {
72 fprintf(stderr
,"You managed to ask for more than one tunnel mode.\n");
75 p
->iph
.protocol
= IPPROTO_IPIP
;
76 } else if (strcmp(*argv
, "gre") == 0 ||
77 strcmp(*argv
, "gre/ip") == 0) {
78 if (p
->iph
.protocol
&& p
->iph
.protocol
!= IPPROTO_GRE
) {
79 fprintf(stderr
,"You managed to ask for more than one tunnel mode.\n");
82 p
->iph
.protocol
= IPPROTO_GRE
;
83 } else if (strcmp(*argv
, "sit") == 0 ||
84 strcmp(*argv
, "ipv6/ip") == 0) {
85 if (p
->iph
.protocol
&& p
->iph
.protocol
!= IPPROTO_IPV6
) {
86 fprintf(stderr
,"You managed to ask for more than one tunnel mode.\n");
89 p
->iph
.protocol
= IPPROTO_IPV6
;
90 } else if (strcmp(*argv
, "isatap") == 0) {
91 if (p
->iph
.protocol
&& p
->iph
.protocol
!= IPPROTO_IPV6
) {
92 fprintf(stderr
, "You managed to ask for more than one tunnel mode.\n");
95 p
->iph
.protocol
= IPPROTO_IPV6
;
98 fprintf(stderr
,"Cannot guess tunnel mode.\n");
101 } else if (strcmp(*argv
, "key") == 0) {
104 p
->i_flags
|= GRE_KEY
;
105 p
->o_flags
|= GRE_KEY
;
106 if (strchr(*argv
, '.'))
107 p
->i_key
= p
->o_key
= get_addr32(*argv
);
109 if (get_unsigned(&uval
, *argv
, 0)<0) {
110 fprintf(stderr
, "invalid value of \"key\"\n");
113 p
->i_key
= p
->o_key
= htonl(uval
);
115 } else if (strcmp(*argv
, "ikey") == 0) {
118 p
->i_flags
|= GRE_KEY
;
119 if (strchr(*argv
, '.'))
120 p
->i_key
= get_addr32(*argv
);
122 if (get_unsigned(&uval
, *argv
, 0)<0) {
123 fprintf(stderr
, "invalid value of \"ikey\"\n");
126 p
->i_key
= htonl(uval
);
128 } else if (strcmp(*argv
, "okey") == 0) {
131 p
->o_flags
|= GRE_KEY
;
132 if (strchr(*argv
, '.'))
133 p
->o_key
= get_addr32(*argv
);
135 if (get_unsigned(&uval
, *argv
, 0)<0) {
136 fprintf(stderr
, "invalid value of \"okey\"\n");
139 p
->o_key
= htonl(uval
);
141 } else if (strcmp(*argv
, "seq") == 0) {
142 p
->i_flags
|= GRE_SEQ
;
143 p
->o_flags
|= GRE_SEQ
;
144 } else if (strcmp(*argv
, "iseq") == 0) {
145 p
->i_flags
|= GRE_SEQ
;
146 } else if (strcmp(*argv
, "oseq") == 0) {
147 p
->o_flags
|= GRE_SEQ
;
148 } else if (strcmp(*argv
, "csum") == 0) {
149 p
->i_flags
|= GRE_CSUM
;
150 p
->o_flags
|= GRE_CSUM
;
151 } else if (strcmp(*argv
, "icsum") == 0) {
152 p
->i_flags
|= GRE_CSUM
;
153 } else if (strcmp(*argv
, "ocsum") == 0) {
154 p
->o_flags
|= GRE_CSUM
;
155 } else if (strcmp(*argv
, "nopmtudisc") == 0) {
157 } else if (strcmp(*argv
, "pmtudisc") == 0) {
158 p
->iph
.frag_off
= htons(IP_DF
);
159 } else if (strcmp(*argv
, "remote") == 0) {
161 if (strcmp(*argv
, "any"))
162 p
->iph
.daddr
= get_addr32(*argv
);
163 } else if (strcmp(*argv
, "local") == 0) {
165 if (strcmp(*argv
, "any"))
166 p
->iph
.saddr
= get_addr32(*argv
);
167 } else if (strcmp(*argv
, "dev") == 0) {
169 strncpy(medium
, *argv
, IFNAMSIZ
-1);
170 } else if (strcmp(*argv
, "ttl") == 0 ||
171 strcmp(*argv
, "hoplimit") == 0) {
174 if (strcmp(*argv
, "inherit") != 0) {
175 if (get_unsigned(&uval
, *argv
, 0))
176 invarg("invalid TTL\n", *argv
);
178 invarg("TTL must be <=255\n", *argv
);
181 } else if (strcmp(*argv
, "tos") == 0 ||
182 strcmp(*argv
, "tclass") == 0 ||
183 matches(*argv
, "dsfield") == 0) {
186 if (strcmp(*argv
, "inherit") != 0) {
187 if (rtnl_dsfield_a2n(&uval
, *argv
))
188 invarg("bad TOS value", *argv
);
193 if (strcmp(*argv
, "name") == 0) {
195 } else if (matches(*argv
, "help") == 0)
198 duparg2("name", *argv
);
199 strncpy(p
->name
, *argv
, IFNAMSIZ
);
200 if (cmd
== SIOCCHGTUNNEL
&& count
== 0) {
201 struct ip_tunnel_parm old_p
;
202 memset(&old_p
, 0, sizeof(old_p
));
203 if (tnl_get_ioctl(*argv
, &old_p
))
213 if (p
->iph
.protocol
== 0) {
214 if (memcmp(p
->name
, "gre", 3) == 0)
215 p
->iph
.protocol
= IPPROTO_GRE
;
216 else if (memcmp(p
->name
, "ipip", 4) == 0)
217 p
->iph
.protocol
= IPPROTO_IPIP
;
218 else if (memcmp(p
->name
, "sit", 3) == 0)
219 p
->iph
.protocol
= IPPROTO_IPV6
;
220 else if (memcmp(p
->name
, "isatap", 6) == 0) {
221 p
->iph
.protocol
= IPPROTO_IPV6
;
226 if (p
->iph
.protocol
== IPPROTO_IPIP
|| p
->iph
.protocol
== IPPROTO_IPV6
) {
227 if ((p
->i_flags
& GRE_KEY
) || (p
->o_flags
& GRE_KEY
)) {
228 fprintf(stderr
, "Keys are not allowed with ipip and sit.\n");
234 p
->link
= if_nametoindex(medium
);
239 if (p
->i_key
== 0 && IN_MULTICAST(ntohl(p
->iph
.daddr
))) {
240 p
->i_key
= p
->iph
.daddr
;
241 p
->i_flags
|= GRE_KEY
;
243 if (p
->o_key
== 0 && IN_MULTICAST(ntohl(p
->iph
.daddr
))) {
244 p
->o_key
= p
->iph
.daddr
;
245 p
->o_flags
|= GRE_KEY
;
247 if (IN_MULTICAST(ntohl(p
->iph
.daddr
)) && !p
->iph
.saddr
) {
248 fprintf(stderr
, "Broadcast tunnel requires a source address.\n");
252 p
->i_flags
|= SIT_ISATAP
;
258 static int do_add(int cmd
, int argc
, char **argv
)
260 struct ip_tunnel_parm p
;
262 if (parse_args(argc
, argv
, cmd
, &p
) < 0)
265 if (p
.iph
.ttl
&& p
.iph
.frag_off
== 0) {
266 fprintf(stderr
, "ttl != 0 and noptmudisc are incompatible\n");
270 switch (p
.iph
.protocol
) {
272 return tnl_add_ioctl(cmd
, "tunl0", p
.name
, &p
);
274 return tnl_add_ioctl(cmd
, "gre0", p
.name
, &p
);
276 return tnl_add_ioctl(cmd
, "sit0", p
.name
, &p
);
278 fprintf(stderr
, "cannot determine tunnel mode (ipip, gre or sit)\n");
284 static int do_del(int argc
, char **argv
)
286 struct ip_tunnel_parm p
;
288 if (parse_args(argc
, argv
, SIOCDELTUNNEL
, &p
) < 0)
291 switch (p
.iph
.protocol
) {
293 return tnl_del_ioctl("tunl0", p
.name
, &p
);
295 return tnl_del_ioctl("gre0", p
.name
, &p
);
297 return tnl_del_ioctl("sit0", p
.name
, &p
);
299 return tnl_del_ioctl(p
.name
, p
.name
, &p
);
304 static void print_tunnel(struct ip_tunnel_parm
*p
)
306 struct ip_tunnel_6rd ip6rd
;
312 memset(&ip6rd
, 0, sizeof(ip6rd
));
313 inet_ntop(AF_INET
, &p
->i_key
, s3
, sizeof(s3
));
314 inet_ntop(AF_INET
, &p
->o_key
, s4
, sizeof(s4
));
316 /* Do not use format_host() for local addr,
317 * symbolic name will not be useful.
319 printf("%s: %s/ip remote %s local %s ",
321 tnl_strproto(p
->iph
.protocol
),
322 p
->iph
.daddr
? format_host(AF_INET
, 4, &p
->iph
.daddr
, s1
, sizeof(s1
)) : "any",
323 p
->iph
.saddr
? rt_addr_n2a(AF_INET
, 4, &p
->iph
.saddr
, s2
, sizeof(s2
)) : "any");
325 if (p
->i_flags
& SIT_ISATAP
) {
326 struct ip_tunnel_prl prl
[16];
329 memset(prl
, 0, sizeof(prl
));
330 prl
[0].datalen
= sizeof(prl
) - sizeof(prl
[0]);
331 prl
[0].addr
= htonl(INADDR_ANY
);
333 if (!tnl_prl_ioctl(SIOCGETPRL
, p
->name
, prl
))
334 for (i
= 1; i
< sizeof(prl
) / sizeof(prl
[0]); i
++)
336 if (prl
[i
].addr
!= htonl(INADDR_ANY
)) {
338 (prl
[i
].flags
& PRL_DEFAULT
) ? "pdr" : "pr",
339 format_host(AF_INET
, 4, &prl
[i
].addr
, s1
, sizeof(s1
)));
345 const char *n
= ll_index_to_name(p
->link
);
347 printf(" dev %s ", n
);
351 printf(" ttl %d ", p
->iph
.ttl
);
353 printf(" ttl inherit ");
361 printf("%c%s ", p
->iph
.tos
&1 ? '/' : ' ',
362 rtnl_dsfield_n2a(p
->iph
.tos
&~1, b1
, sizeof(b1
)));
365 if (!(p
->iph
.frag_off
&htons(IP_DF
)))
366 printf(" nopmtudisc");
368 if (p
->iph
.protocol
== IPPROTO_IPV6
&& !tnl_ioctl_get_6rd(p
->name
, &ip6rd
) && ip6rd
.prefixlen
) {
369 printf(" 6rd-prefix %s/%u ",
370 inet_ntop(AF_INET6
, &ip6rd
.prefix
, s1
, sizeof(s1
)),
372 if (ip6rd
.relay_prefix
) {
373 printf("6rd-relay_prefix %s/%u ",
374 format_host(AF_INET
, 4, &ip6rd
.relay_prefix
, s1
, sizeof(s1
)),
375 ip6rd
.relay_prefixlen
);
379 if ((p
->i_flags
&GRE_KEY
) && (p
->o_flags
&GRE_KEY
) && p
->o_key
== p
->i_key
)
380 printf(" key %s", s3
);
381 else if ((p
->i_flags
|p
->o_flags
)&GRE_KEY
) {
382 if (p
->i_flags
&GRE_KEY
)
383 printf(" ikey %s ", s3
);
384 if (p
->o_flags
&GRE_KEY
)
385 printf(" okey %s ", s4
);
388 if (p
->i_flags
&GRE_SEQ
)
389 printf("%s Drop packets out of sequence.\n", _SL_
);
390 if (p
->i_flags
&GRE_CSUM
)
391 printf("%s Checksum in received packet is required.", _SL_
);
392 if (p
->o_flags
&GRE_SEQ
)
393 printf("%s Sequence packets on output.", _SL_
);
394 if (p
->o_flags
&GRE_CSUM
)
395 printf("%s Checksum output packets.", _SL_
);
398 static int do_tunnels_list(struct ip_tunnel_parm
*p
)
401 unsigned long rx_bytes
, rx_packets
, rx_errs
, rx_drops
,
403 tx_bytes
, tx_packets
, tx_errs
, tx_drops
,
404 tx_fifo
, tx_colls
, tx_carrier
, rx_multi
;
405 struct ip_tunnel_parm p1
;
408 FILE *fp
= fopen("/proc/net/dev", "r");
414 fgets(buf
, sizeof(buf
), fp
);
415 fgets(buf
, sizeof(buf
), fp
);
417 while (fgets(buf
, sizeof(buf
), fp
) != NULL
) {
420 buf
[sizeof(buf
) - 1] = 0;
421 if ((ptr
= strchr(buf
, ':')) == NULL
||
422 (*ptr
++ = 0, sscanf(buf
, "%s", name
) != 1)) {
423 fprintf(stderr
, "Wrong format of /proc/net/dev. Sorry.\n");
426 if (sscanf(ptr
, "%ld%ld%ld%ld%ld%ld%ld%*d%ld%ld%ld%ld%ld%ld%ld",
427 &rx_bytes
, &rx_packets
, &rx_errs
, &rx_drops
,
428 &rx_fifo
, &rx_frame
, &rx_multi
,
429 &tx_bytes
, &tx_packets
, &tx_errs
, &tx_drops
,
430 &tx_fifo
, &tx_colls
, &tx_carrier
) != 14)
432 if (p
->name
[0] && strcmp(p
->name
, name
))
434 index
= ll_name_to_index(name
);
437 type
= ll_index_to_type(index
);
439 fprintf(stderr
, "Failed to get type of [%s]\n", name
);
442 if (type
!= ARPHRD_TUNNEL
&& type
!= ARPHRD_IPGRE
&& type
!= ARPHRD_SIT
)
444 memset(&p1
, 0, sizeof(p1
));
445 if (tnl_get_ioctl(name
, &p1
))
447 if ((p
->link
&& p1
.link
!= p
->link
) ||
448 (p
->name
[0] && strcmp(p1
.name
, p
->name
)) ||
449 (p
->iph
.daddr
&& p1
.iph
.daddr
!= p
->iph
.daddr
) ||
450 (p
->iph
.saddr
&& p1
.iph
.saddr
!= p
->iph
.saddr
) ||
451 (p
->i_key
&& p1
.i_key
!= p
->i_key
))
456 printf("RX: Packets Bytes Errors CsumErrs OutOfSeq Mcasts%s", _SL_
);
457 printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-8ld%s",
458 rx_packets
, rx_bytes
, rx_errs
, rx_frame
, rx_fifo
, rx_multi
, _SL_
);
459 printf("TX: Packets Bytes Errors DeadLoop NoRoute NoBufs%s", _SL_
);
460 printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-6ld",
461 tx_packets
, tx_bytes
, tx_errs
, tx_colls
, tx_carrier
, tx_drops
);
468 static int do_show(int argc
, char **argv
)
471 struct ip_tunnel_parm p
;
474 if (parse_args(argc
, argv
, SIOCGETTUNNEL
, &p
) < 0)
477 switch (p
.iph
.protocol
) {
479 err
= tnl_get_ioctl(p
.name
[0] ? p
.name
: "tunl0", &p
);
482 err
= tnl_get_ioctl(p
.name
[0] ? p
.name
: "gre0", &p
);
485 err
= tnl_get_ioctl(p
.name
[0] ? p
.name
: "sit0", &p
);
499 static int do_prl(int argc
, char **argv
)
501 struct ip_tunnel_prl p
;
505 char medium
[IFNAMSIZ
];
507 memset(&p
, 0, sizeof(p
));
508 memset(&medium
, 0, sizeof(medium
));
511 if (strcmp(*argv
, "prl-default") == 0) {
514 p
.addr
= get_addr32(*argv
);
515 p
.flags
|= PRL_DEFAULT
;
517 } else if (strcmp(*argv
, "prl-nodefault") == 0) {
520 p
.addr
= get_addr32(*argv
);
522 } else if (strcmp(*argv
, "prl-delete") == 0) {
525 p
.addr
= get_addr32(*argv
);
527 } else if (strcmp(*argv
, "dev") == 0) {
529 strncpy(medium
, *argv
, IFNAMSIZ
-1);
532 fprintf(stderr
,"%s: Invalid PRL parameter.\n", *argv
);
536 fprintf(stderr
,"One PRL entry at a time.\n");
542 fprintf(stderr
, "Must specify dev.\n");
546 return tnl_prl_ioctl(cmd
, medium
, &p
);
549 static int do_6rd(int argc
, char **argv
)
551 struct ip_tunnel_6rd ip6rd
;
554 char medium
[IFNAMSIZ
];
557 memset(&ip6rd
, 0, sizeof(ip6rd
));
558 memset(&medium
, 0, sizeof(medium
));
561 if (strcmp(*argv
, "6rd-prefix") == 0) {
563 if (get_prefix(&prefix
, *argv
, AF_INET6
))
564 invarg("invalid 6rd_prefix\n", *argv
);
566 memcpy(&ip6rd
.prefix
, prefix
.data
, 16);
567 ip6rd
.prefixlen
= prefix
.bitlen
;
568 } else if (strcmp(*argv
, "6rd-relay_prefix") == 0) {
570 if (get_prefix(&prefix
, *argv
, AF_INET
))
571 invarg("invalid 6rd-relay_prefix\n", *argv
);
573 memcpy(&ip6rd
.relay_prefix
, prefix
.data
, 4);
574 ip6rd
.relay_prefixlen
= prefix
.bitlen
;
575 } else if (strcmp(*argv
, "6rd-reset") == 0) {
577 } else if (strcmp(*argv
, "dev") == 0) {
579 strncpy(medium
, *argv
, IFNAMSIZ
-1);
582 fprintf(stderr
,"%s: Invalid 6RD parameter.\n", *argv
);
588 fprintf(stderr
, "Must specify dev.\n");
592 return tnl_6rd_ioctl(cmd
, medium
, &ip6rd
);
595 int do_iptunnel(int argc
, char **argv
)
597 switch (preferred_family
) {
599 preferred_family
= AF_INET
;
604 * This is silly enough but we have no easy way to make it
605 * protocol-independent because of unarranged structure between
609 return do_ip6tunnel(argc
, argv
);
611 fprintf(stderr
, "Unsupported family:%d\n", preferred_family
);
616 if (matches(*argv
, "add") == 0)
617 return do_add(SIOCADDTUNNEL
, argc
-1, argv
+1);
618 if (matches(*argv
, "change") == 0)
619 return do_add(SIOCCHGTUNNEL
, argc
-1, argv
+1);
620 if (matches(*argv
, "del") == 0)
621 return do_del(argc
-1, argv
+1);
622 if (matches(*argv
, "show") == 0 ||
623 matches(*argv
, "lst") == 0 ||
624 matches(*argv
, "list") == 0)
625 return do_show(argc
-1, argv
+1);
626 if (matches(*argv
, "prl") == 0)
627 return do_prl(argc
-1, argv
+1);
628 if (matches(*argv
, "6rd") == 0)
629 return do_6rd(argc
-1, argv
+1);
630 if (matches(*argv
, "help") == 0)
633 return do_show(0, NULL
);
635 fprintf(stderr
, "Command \"%s\" is unknown, try \"ip tunnel help\".\n", *argv
);