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TUNNEL: IPv6-over-IPv6 tunnel support.

Browse Source 
Fix ip6tunnel.c to be fit with current ip command style.
Unlike other modules currently iptunnel (and ip6tunnel) is not
designed as protocol-independent because of unarranged structure
between IPv4 and IPv6.

Usage: ip -f inet6 tunnel { add | change | del | show } [ NAME ]
          [ remote ADDR local ADDR ] [ dev PHYS_DEV ]
          [ encaplimit ELIM ]
          [ hoplimit HLIM ] [ tc TC ] [ fl FL ]
          [ dscp inherit ]

Where: NAME := STRING
       ADDR := IPV6_ADDRESS
       ELIM := { none | 0..255 }(default=4)
       HLIM := 0..255 (default=64)
       TC   := { 0x0..0xff | inherit }
       FL   := { 0x0..0xfffff | inherit }

Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org>
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
This commit is contained in:
Masahide NAKAMURA 2006-11-24 12:27:09 +09:00 committed by Stephen Hemminger
parent 9447a0d344
commit 288384f22f
5 changed files with 316 additions and 288 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
include/linux/ip6_tunnel.h Normal file
View File

@ -0,0 +1,34 @@
/*
* $Id$
*/
#ifndef _IP6_TUNNEL_H
#define _IP6_TUNNEL_H
#define IPV6_TLV_TNL_ENCAP_LIMIT 4
#define IPV6_DEFAULT_TNL_ENCAP_LIMIT 4
/* don't add encapsulation limit if one isn't present in inner packet */
#define IP6_TNL_F_IGN_ENCAP_LIMIT 0x1
/* copy the traffic class field from the inner packet */
#define IP6_TNL_F_USE_ORIG_TCLASS 0x2
/* copy the flowlabel from the inner packet */
#define IP6_TNL_F_USE_ORIG_FLOWLABEL 0x4
/* being used for Mobile IPv6 */
#define IP6_TNL_F_MIP6_DEV 0x8
/* copy DSCP from the outer packet */
#define IP6_TNL_F_RCV_DSCP_COPY 0x10
struct ip6_tnl_parm {
char name[IFNAMSIZ]; /* name of tunnel device */
int link; /* ifindex of underlying L2 interface */
__u8 proto; /* tunnel protocol */
__u8 encap_limit; /* encapsulation limit for tunnel */
__u8 hop_limit; /* hop limit for tunnel */
__u32 flowinfo; /* traffic class and flowlabel for tunnel */
__u32 flags; /* tunnel flags */
struct in6_addr laddr; /* local tunnel end-point address */
struct in6_addr raddr; /* remote tunnel end-point address */
};
#endif

2
ip/Makefile
View File

@ -1,5 +1,5 @@
IPOBJ=ip.o ipaddress.o iproute.o iprule.o \
rtm_map.o iptunnel.o tunnel.o ipneigh.o ipntable.o iplink.o \
rtm_map.o iptunnel.o ip6tunnel.o tunnel.o ipneigh.o ipntable.o iplink.o \
ipmaddr.o ipmonitor.o ipmroute.o ipprefix.o \
ipxfrm.o xfrm_state.o xfrm_policy.o xfrm_monitor.o

559
ip/ip6tunnel.c
View File

@ -28,139 +28,47 @@
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netdb.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <asm/types.h>
#include <linux/sockios.h>
#include <sys/ioctl.h>
#include <linux/ip.h>
#include <linux/if.h>
#include <linux/if_arp.h>
#include <linux/if_tunnel.h>
#include <linux/ip6_tunnel.h>
#include "ipv6_tunnel.h"
#include "utils.h"
#include "tunnel.h"
#define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
#define IP6_FLOWINFO_FLOWLABEL htonl(0x000FFFFF)
int tunnel_local_packets = 0;
#define DEFAULT_TNL_HOP_LIMIT (64)
static void usage(void) __attribute__((noreturn));
static void usage(void)
{
fprintf(stderr, "Usage: ipv6tunnel { add | change | del | show } [ NAME ]\n");
fprintf(stderr, " [ --allow-local-packets ]\n");
fprintf(stderr, " [ --use-original-traffic-class ]\n");
fprintf(stderr, " [ remote ADDR local ADDR ]\n");
fprintf(stderr, " [ dev PHYS_DEV ]\n");
fprintf(stderr, " [ encaplimit TEL ]\n");
fprintf(stderr, " [ hoplimit HOPLIMIT ]\n");
fprintf(stderr, " [ flowlabel FL ]\n");
fprintf(stderr, "Usage: ip -f inet6 tunnel { add | change | del | show } [ NAME ]\n");
fprintf(stderr, " [ remote ADDR local ADDR ] [ dev PHYS_DEV ]\n");
fprintf(stderr, " [ encaplimit ELIM ]\n");
fprintf(stderr ," [ hoplimit HLIM ] [ tc TC ] [ fl FL ]\n");
fprintf(stderr, " [ dscp inherit ]\n");
fprintf(stderr, "\n");
fprintf(stderr, "Where: NAME := STRING\n");
fprintf(stderr, " ADDR := IPV6_ADDRESS\n");
fprintf(stderr, " HOPLIMIT := 0..255\n");
fprintf(stderr, " TEL := { none | 0..255 }\n");
fprintf(stderr, " FL := 0x0..0xfffff\n");
fprintf(stderr, " PHYS_DEV := STRING\n");
fprintf(stderr, " ELIM := { none | 0..255 }(default=%d)\n",
IPV6_DEFAULT_TNL_ENCAP_LIMIT);
fprintf(stderr, " HLIM := 0..255 (default=%d)\n",
DEFAULT_TNL_HOP_LIMIT);
fprintf(stderr, " TC := { 0x0..0xff | inherit }\n");
fprintf(stderr, " FL := { 0x0..0xfffff | inherit }\n");
exit(-1);
}
static int do_ioctl_get_ifindex(char *dev)
{
struct ifreq ifr;
int fd;
int err;
// fprintf(stderr, "do_ioctl_get_ifindex\n");
strcpy(ifr.ifr_name, dev);
fd = socket(AF_INET6, SOCK_DGRAM, 0);
err = ioctl(fd, SIOCGIFINDEX, &ifr);
if (err) {
perror("ioctl");
return 0;
}
close(fd);
return ifr.ifr_ifindex;
}
static char *do_ioctl_get_ifname(int idx)
{
static struct ifreq ifr;
int fd;
int err;
// fprintf(stderr, "do_ioctl_get_ifname\n");
ifr.ifr_ifindex = idx;
fd = socket(AF_INET6, SOCK_DGRAM, 0);
err = ioctl(fd, SIOCGIFNAME, &ifr);
if (err) {
perror("ioctl");
return NULL;
}
close(fd);
return ifr.ifr_name;
}
static int do_get_ioctl(char *basedev, struct ipv6_tnl_parm *p)
{
struct ifreq ifr;
int fd;
int err;
// fprintf(stderr, "do_get_ioctl\n");
strcpy(ifr.ifr_name, basedev);
ifr.ifr_ifru.ifru_data = (void *)p;
fd = socket(AF_INET6, SOCK_DGRAM, 0);
err = ioctl(fd, SIOCGETTUNNEL, &ifr);
if (err)
perror("ioctl");
close(fd);
return err;
}
static int do_add_ioctl(int cmd, char *basedev, struct ipv6_tnl_parm *p)
{
struct ifreq ifr;
int fd;
int err;
// fprintf(stderr, "do_add_ioctl\n");
strcpy(ifr.ifr_name, basedev);
ifr.ifr_ifru.ifru_data = (void *)p;
fd = socket(AF_INET6, SOCK_DGRAM, 0);
err = ioctl(fd, cmd, &ifr);
if (err)
perror("ioctl");
close(fd);
return err;
}
static int do_del_ioctl(char *basedev, struct ipv6_tnl_parm *p)
{
struct ifreq ifr;
int fd;
int err;
// fprintf(stderr, "do_del_ioctl\n");
strcpy(ifr.ifr_name, basedev);
ifr.ifr_ifru.ifru_data = (void *)p;
fd = socket(AF_INET6, SOCK_DGRAM, 0);
err = ioctl(fd, SIOCDELTUNNEL, &ifr);
if (err)
perror("ioctl");
close(fd);
return err;
}
void print_tunnel(struct ipv6_tnl_parm *p)
static void print_tunnel(struct ip6_tnl_parm *p)
{
char remote[64];
char local[64];
@ -168,235 +76,312 @@ void print_tunnel(struct ipv6_tnl_parm *p)
inet_ntop(AF_INET6, &p->raddr, remote, sizeof(remote));
inet_ntop(AF_INET6, &p->laddr, local, sizeof(local));
printf("%s: %s/IPv6 remote %s local %s",
p->name,
(p->proto == IPPROTO_IPV6 ? "IPv6" : "unknown"),
remote, local);
printf("%s: %s/ipv6 remote %s local %s",
p->name, tnl_strproto(p->proto), remote, local);
if (p->link) {
char *n = do_ioctl_get_ifname(p->link);
char *n = tnl_ioctl_get_ifname(p->link);
if (n)
printf(" dev %s", n);
}
if (p->encap_limit)
printf(" encaplimit %d", p->encap_limit);
printf(" hoplimit %d", p->hop_limit);
if (p->flags & IP6_TNL_F_IGN_ENCAP_LIMIT)
printf(" encaplimit none");
else
printf(" encaplimit %u", p->encap_limit);
if (p->flow_lbl)
printf(" flowlabel 0x%x", p->flow_lbl);
printf(" hoplimit %u", p->hop_limit);
if (p->flags) {
char flags[33];
char *fp = flags;
memset(flags, 0, 33);
if (p->flags & IPV6_TNL_F_IGN_ENCAP_LIMIT) {
*fp = 'E';
fp++;
}
if (p->flags & IPV6_TNL_F_USE_ORIG_TCLASS) {
*fp = 'T';
fp++;
}
if (p->flags & IPV6_TNL_F_ALLOW_LOCAL) {
*fp = 'L';
fp++;
}
if (p->flags & IPV6_TNL_F_KERNEL_DEV) {
*fp = 'K';
fp++;
}
if (p->flags & IPV6_TNL_F_MIPV6_DEV) {
*fp = 'M';
fp++;
}
if (p->flags & IPV6_TNL_F_RCV_ONLY) {
*fp = 'R';
fp++;
}
printf(" flags %s", flags);
if (p->flags & IP6_TNL_F_USE_ORIG_TCLASS)
printf(" tc inherit");
else {
__u32 val = ntohl(p->flowinfo & IP6_FLOWINFO_TCLASS);
printf(" tc 0x%02x", (__u8)(val >> 20));
}
printf("\n");
if (p->flags & IP6_TNL_F_USE_ORIG_FLOWLABEL)
printf(" fl inherit");
else
printf(" fl 0x%05x", ntohl(p->flowinfo & IP6_FLOWINFO_FLOWLABEL));
printf(" (flowinfo 0x%08x)", ntohl(p->flowinfo));
if (p->flags & IP6_TNL_F_RCV_DSCP_COPY)
printf(" dscp inherit");
}
void resolve_name(char *name, struct in6_addr *ip6)
{
struct addrinfo ai, *res;
int err;
memset(&ai, 0, sizeof(struct addrinfo));
ai.ai_family = AF_INET6;
ai.ai_protocol = IPPROTO_IPV6;
ai.ai_flags = AI_NUMERICHOST;
err = getaddrinfo(name, NULL, &ai, &res);
if (err)
exit(-1);
*ip6 = ((struct sockaddr_in6 *) (res->ai_addr))->sin6_addr;
freeaddrinfo(res);
}
int get_u8(__u8 *val, char *arg)
{
unsigned long res = 0;
char *ptr;
if (!arg || !*arg)
return -1;
res = strtoul(arg, &ptr, 0);
if (!ptr || ptr == arg || *ptr || res > 0xFF)
return -1;
*val = (__u8) res;
return 0;
}
int get_u20(__u32 *val, char *arg)
{
unsigned long res = 0;
char *ptr;
if (!arg || !*arg)
return -1;
res = strtoul(arg, &ptr, 0);
if (!ptr || ptr == arg || *ptr || res > 0xFFFFF)
return -1;
*val = res;
return 0;
}
static int parse_args(int argc, char **argv, struct ipv6_tnl_parm *p)
static int parse_args(int argc, char **argv, struct ip6_tnl_parm *p)
{
char medium[IFNAMSIZ];
// fprintf(stderr, "parse_args\n");
memset(p, 0, sizeof(*p));
p->hop_limit = -1;
p->encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
p->proto = IPPROTO_IPV6;
memset(&medium, 0, sizeof(medium));
memset(medium, 0, sizeof(medium));
while (argc > 0) {
if (!strcmp(*argv, "--help") || !strcmp(*argv, "-h")) {
usage();
} else if (!strcmp(*argv, "--allow-local-packets")) {
p->flags |= IPV6_TNL_F_ALLOW_LOCAL;
} else if (!strcmp(*argv, "--use-original-traffic-class")) {
p->flags |= IPV6_TNL_F_USE_ORIG_TCLASS;
} else if (!strcmp(*argv, "remote")) {
argv++;
if (--argc <= 0)
usage();
resolve_name(*argv, &p->raddr);
} else if (!strcmp(*argv, "local")) {
argv++;
if (--argc <= 0)
usage();
resolve_name(*argv, &p->laddr);
} else if (!strcmp(*argv, "dev")) {
argv++;
if (--argc <= 0)
usage();
if (strcmp(*argv, "remote") == 0) {
inet_prefix raddr;
NEXT_ARG();
get_prefix(&raddr, *argv, preferred_family);
if (raddr.family == AF_UNSPEC)
invarg("\"remote\" address family is AF_UNSPEC", *argv);
memcpy(&p->raddr, &raddr.data, sizeof(p->raddr));
} else if (strcmp(*argv, "local") == 0) {
inet_prefix laddr;
NEXT_ARG();
get_prefix(&laddr, *argv, preferred_family);
if (laddr.family == AF_UNSPEC)
invarg("\"local\" address family is AF_UNSPEC", *argv);
memcpy(&p->laddr, &laddr.data, sizeof(p->laddr));
} else if (strcmp(*argv, "dev") == 0) {
NEXT_ARG();
strncpy(medium, *argv, IFNAMSIZ - 1);
} else if (!strcmp(*argv, "hoplimit")) {
__u8 uval;
argv++;
if (--argc <= 0)
usage();
if (get_u8(&uval, *argv) < -1)
usage();
p->hop_limit = uval;
} else if (!strcmp(*argv, "flowlabel")) {
__u32 uval;
argv++;
if (--argc <= 0)
usage();
if (get_u20(&uval, *argv) < -1)
usage();
p->flow_lbl = uval;
} else if (!strcmp(*argv, "encaplimit")) {
argv++;
if (--argc <= 0)
usage();
if (!strcmp(*argv, "none")) {
p->flags |= IPV6_TNL_F_IGN_ENCAP_LIMIT;
} else if (strcmp(*argv, "encaplimit") == 0) {
NEXT_ARG();
if (strcmp(*argv, "none") == 0) {
p->flags |= IP6_TNL_F_IGN_ENCAP_LIMIT;
} else {
__u8 uval;
if (get_u8(&uval, *argv) < -1)
usage();
if (get_u8(&uval, *argv, 0) < -1)
invarg("invalid ELIM", *argv);
p->encap_limit = uval;
}
} else if (strcmp(*argv, "hoplimit") == 0) {
__u8 uval;
NEXT_ARG();
if (get_u8(&uval, *argv, 0))
invarg("invalid HLIM", *argv);
p->hop_limit = uval;
} else if (strcmp(*argv, "tc") == 0) {
__u8 uval;
NEXT_ARG();
if (strcmp(*argv, "inherit") == 0)
p->flags |= IP6_TNL_F_USE_ORIG_TCLASS;
else {
if (get_u8(&uval, *argv, 16))
invarg("invalid TC", *argv);
p->flowinfo |= htonl((__u32)uval << 20) & IP6_FLOWINFO_TCLASS;
p->flags &= ~IP6_TNL_F_USE_ORIG_TCLASS;
}
} else if (strcmp(*argv, "fl") == 0) {
__u32 uval;
NEXT_ARG();
if (strcmp(*argv, "inherit") == 0)
p->flags |= IP6_TNL_F_USE_ORIG_FLOWLABEL;
else {
if (get_u32(&uval, *argv, 16))
invarg("invalid FL", *argv);
if (uval > 0xFFFFF)
invarg("invalid FL", *argv);
p->flowinfo |= htonl(uval) & IP6_FLOWINFO_FLOWLABEL;
p->flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL;
}
} else if (strcmp(*argv, "dscp") == 0) {
NEXT_ARG();
if (strcmp(*argv, "inherit") != 0)
invarg("not inherit", *argv);
p->flags |= IP6_TNL_F_RCV_DSCP_COPY;
} else {
if (p->name[0])
if (strcmp(*argv, "name") == 0) {
NEXT_ARG();
}
if (matches(*argv, "help") == 0)
usage();
if (p->name[0])
duparg2("name", *argv);
strncpy(p->name, *argv, IFNAMSIZ - 1);
}
argc--; argv++;
}
if (medium[0]) {
p->link = do_ioctl_get_ifindex(medium);
p->link = tnl_ioctl_get_ifindex(medium);
if (p->link == 0)
return -1;
}
return 0;
}
static void ip6_tnl_parm_init(struct ip6_tnl_parm *p, int apply_default)
{
memset(p, 0, sizeof(*p));
p->proto = IPPROTO_IPV6;
if (apply_default) {
p->hop_limit = DEFAULT_TNL_HOP_LIMIT;
p->encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
}
}
/*
* @p1: user specified parameter
* @p2: database entry
*/
static int ip6_tnl_parm_match(const struct ip6_tnl_parm *p1,
const struct ip6_tnl_parm *p2)
{
return ((!p1->link || p1->link == p2->link) &&
(!p1->name[0] || strcmp(p1->name, p2->name) == 0) &&
(memcmp(&p1->laddr, &in6addr_any, sizeof(p1->laddr)) == 0 ||
memcmp(&p1->laddr, &p2->laddr, sizeof(p1->laddr)) == 0) &&
(memcmp(&p1->raddr, &in6addr_any, sizeof(p1->raddr)) == 0 ||
memcmp(&p1->raddr, &p2->raddr, sizeof(p1->raddr)) == 0) &&
(!p1->proto || !p2->proto || p1->proto == p2->proto) &&
(!p1->encap_limit || p1->encap_limit == p2->encap_limit) &&
(!p1->hop_limit || p1->hop_limit == p2->hop_limit) &&
(!(p1->flowinfo & IP6_FLOWINFO_TCLASS) ||
!((p1->flowinfo ^ p2->flowinfo) & IP6_FLOWINFO_TCLASS)) &&
(!(p1->flowinfo & IP6_FLOWINFO_FLOWLABEL) ||
!((p1->flowinfo ^ p2->flowinfo) & IP6_FLOWINFO_FLOWLABEL)) &&
(!p1->flags || (p1->flags & p2->flags)));
}
static int do_tunnels_list(struct ip6_tnl_parm *p)
{
char buf[512];
int err = -1;
FILE *fp = fopen("/proc/net/dev", "r");
if (fp == NULL) {
perror("fopen");
goto end;
}
/* skip two lines at the begenning of the file */
fgets(buf, sizeof(buf), fp);
fgets(buf, sizeof(buf), fp);
while (fgets(buf, sizeof(buf), fp) != NULL) {
char name[IFNAMSIZ];
int type;
unsigned long rx_bytes, rx_packets, rx_errs, rx_drops,
rx_fifo, rx_frame,
tx_bytes, tx_packets, tx_errs, tx_drops,
tx_fifo, tx_colls, tx_carrier, rx_multi;
struct ip6_tnl_parm p1;
char *ptr;
buf[sizeof(buf) - 1] = '\0';
if ((ptr = strchr(buf, ':')) == NULL ||
(*ptr++ = 0, sscanf(buf, "%s", name) != 1)) {
fprintf(stderr, "Wrong format of /proc/net/dev. Sorry.\n");
goto end;
}
if (sscanf(ptr, "%ld%ld%ld%ld%ld%ld%ld%*d%ld%ld%ld%ld%ld%ld%ld",
&rx_bytes, &rx_packets, &rx_errs, &rx_drops,
&rx_fifo, &rx_frame, &rx_multi,
&tx_bytes, &tx_packets, &tx_errs, &tx_drops,
&tx_fifo, &tx_colls, &tx_carrier) != 14)
continue;
if (p->name[0] && strcmp(p->name, name))
continue;
type = tnl_ioctl_get_iftype(name);
if (type == -1) {
fprintf(stderr, "Failed to get type of [%s]\n", name);
continue;
}
if (type != ARPHRD_TUNNEL6)
continue;
memset(&p1, 0, sizeof(p1));
ip6_tnl_parm_init(&p1, 0);
strcpy(p1.name, name);
p1.link = tnl_ioctl_get_ifindex(p1.name);
if (p1.link == 0)
continue;
if (tnl_get_ioctl(p1.name, &p1))
continue;
if (!ip6_tnl_parm_match(p, &p1))
continue;
print_tunnel(&p1);
if (show_stats) {
printf("%s", _SL_);
printf("RX: Packets Bytes Errors CsumErrs OutOfSeq Mcasts%s", _SL_);
printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-8ld%s",
rx_packets, rx_bytes, rx_errs, rx_frame, rx_fifo, rx_multi, _SL_);
printf("TX: Packets Bytes Errors DeadLoop NoRoute NoBufs%s", _SL_);
printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-6ld",
tx_packets, tx_bytes, tx_errs, tx_colls, tx_carrier, tx_drops);
}
printf("\n");
}
err = 0;
end:
if (fp)
fclose(fp);
return err;
}
static int do_show(int argc, char **argv)
{
struct ipv6_tnl_parm p;
struct ip6_tnl_parm p;
ip6_tnl_parm_init(&p, 0);
if (parse_args(argc, argv, &p) < 0)
return -1;
if (do_get_ioctl(p.name[0] ? p.name : "ip6tnl0", &p))
return -1;
if (!p.name[0] || show_stats)
do_tunnels_list(&p);
else {
if (tnl_get_ioctl(p.name, &p))
return -1;
print_tunnel(&p);
printf("\n");
}
print_tunnel(&p);
return 0;
}
static int do_add(int cmd, int argc, char **argv)
{
struct ipv6_tnl_parm p;
struct ip6_tnl_parm p;
ip6_tnl_parm_init(&p, 1);
if (parse_args(argc, argv, &p) < 0)
return -1;
return do_add_ioctl(cmd,
cmd == SIOCCHGTUNNEL && p.name[0] ?
p.name : "ip6tnl0", &p);
return tnl_add_ioctl(cmd,
cmd == SIOCCHGTUNNEL && p.name[0] ?
p.name : "ip6tnl0", p.name, &p);
}
int do_del(int argc, char **argv)
static int do_del(int argc, char **argv)
{
struct ipv6_tnl_parm p;
struct ip6_tnl_parm p;
ip6_tnl_parm_init(&p, 1);
if (parse_args(argc, argv, &p) < 0)
return -1;
return do_del_ioctl(p.name[0] ? p.name : "ip6tnl0", &p);
return tnl_del_ioctl(p.name[0] ? p.name : "ip6tnl0", p.name, &p);
}
int main(int argc, char **argv)
int do_ip6tunnel(int argc, char **argv)
{
argc--;
argv++;
if (argc > 0) {
if (strcmp(*argv, "add") == 0)
return do_add(SIOCADDTUNNEL, argc - 1, argv + 1);
else if (strcmp(*argv, "change") == 0)
return do_add(SIOCCHGTUNNEL, argc - 1, argv + 1);
else if (strcmp(*argv, "del") == 0)
return do_del(argc - 1, argv + 1);
else if (strcmp(*argv, "show") == 0)
return do_show(argc - 1, argv + 1);
else
usage();
switch (preferred_family) {
case AF_UNSPEC:
preferred_family = AF_INET6;
break;
case AF_INET6:
break;
default:
fprintf(stderr, "Unsupported family:%d\n", preferred_family);
exit(-1);
}
if (argc > 0) {
if (matches(*argv, "add") == 0)
return do_add(SIOCADDTUNNEL, argc - 1, argv + 1);
if (matches(*argv, "change") == 0)
return do_add(SIOCCHGTUNNEL, argc - 1, argv + 1);
if (matches(*argv, "del") == 0)
return do_del(argc - 1, argv + 1);
if (matches(*argv, "show") == 0 ||
matches(*argv, "lst") == 0 ||
matches(*argv, "list") == 0)
return do_show(argc - 1, argv + 1);
if (matches(*argv, "help") == 0)
usage();
} else
return do_show(0, NULL);
return 0;
fprintf(stderr, "Command \"%s\" is unknown, try \"ip -f inet6 tunnel help\".\n", *argv);
exit(-1);
}

1
ip/ip_common.h
View File

@ -28,6 +28,7 @@ extern int do_iprule(int argc, char **argv);
extern int do_ipneigh(int argc, char **argv);
extern int do_ipntable(int argc, char **argv);
extern int do_iptunnel(int argc, char **argv);
extern int do_ip6tunnel(int argc, char **argv);
extern int do_iplink(int argc, char **argv);
extern int do_ipmonitor(int argc, char **argv);
extern int do_multiaddr(int argc, char **argv);

8
ip/iptunnel.c
View File

@ -31,6 +31,7 @@
#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"
#include "tunnel.h"
static void usage(void) __attribute__((noreturn));
@ -455,6 +456,13 @@ int do_iptunnel(int argc, char **argv)
break;
case AF_INET:
break;
/*
* This is silly enough but we have no easy way to make it
* protocol-independent because of unarranged structure between
* IPv4 and IPv6.
*/
case AF_INET6:
return do_ip6tunnel(argc, argv);
default:
fprintf(stderr, "Unsupported family:%d\n", preferred_family);
exit(-1);