[mirror_iproute2.git] / ip / iptunnel.c

/*
 * iptunnel.c	       "ip tunnel"
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 *
 * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <sys/ioctl.h>
#include <linux/if.h>
#include <linux/if_arp.h>
#include <linux/ip.h>
#include <linux/if_tunnel.h>

#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"
#include "tunnel.h"

static void usage(void) __attribute__((noreturn));

static void usage(void)
{
	fprintf(stderr, "Usage: ip tunnel { add | change | del | show | prl | 6rd } [ NAME ]\n");
	fprintf(stderr, "          [ mode { ipip | gre | sit | isatap } ] [ remote ADDR ] [ local ADDR ]\n");
	fprintf(stderr, "          [ [i|o]seq ] [ [i|o]key KEY ] [ [i|o]csum ]\n");
	fprintf(stderr, "          [ prl-default ADDR ] [ prl-nodefault ADDR ] [ prl-delete ADDR ]\n");
	fprintf(stderr, "          [ 6rd-prefix ADDR ] [ 6rd-relay_prefix ADDR ] [ 6rd-reset ]\n");
	fprintf(stderr, "          [ ttl TTL ] [ tos TOS ] [ [no]pmtudisc ] [ dev PHYS_DEV ]\n");
	fprintf(stderr, "\n");
	fprintf(stderr, "Where: NAME := STRING\n");
	fprintf(stderr, "       ADDR := { IP_ADDRESS | any }\n");
	fprintf(stderr, "       TOS  := { NUMBER | inherit }\n");
	fprintf(stderr, "       TTL  := { 1..255 | inherit }\n");
	fprintf(stderr, "       KEY  := { DOTTED_QUAD | NUMBER }\n");
	exit(-1);
}

static int parse_args(int argc, char **argv, int cmd, struct ip_tunnel_parm *p)
{
	int count = 0;
	char medium[IFNAMSIZ];
	int isatap = 0;

	memset(p, 0, sizeof(*p));
	memset(&medium, 0, sizeof(medium));

	p->iph.version = 4;
	p->iph.ihl = 5;
#ifndef IP_DF
#define IP_DF		0x4000		/* Flag: "Don't Fragment"	*/
#endif
	p->iph.frag_off = htons(IP_DF);

	while (argc > 0) {
		if (strcmp(*argv, "mode") == 0) {
			NEXT_ARG();
			if (strcmp(*argv, "ipip") == 0 ||
			    strcmp(*argv, "ip/ip") == 0) {
				if (p->iph.protocol && p->iph.protocol != IPPROTO_IPIP) {
					fprintf(stderr,"You managed to ask for more than one tunnel mode.\n");
					exit(-1);
				}
				p->iph.protocol = IPPROTO_IPIP;
			} else if (strcmp(*argv, "gre") == 0 ||
				   strcmp(*argv, "gre/ip") == 0) {
				if (p->iph.protocol && p->iph.protocol != IPPROTO_GRE) {
					fprintf(stderr,"You managed to ask for more than one tunnel mode.\n");
					exit(-1);
				}
				p->iph.protocol = IPPROTO_GRE;
			} else if (strcmp(*argv, "sit") == 0 ||
				   strcmp(*argv, "ipv6/ip") == 0) {
				if (p->iph.protocol && p->iph.protocol != IPPROTO_IPV6) {
					fprintf(stderr,"You managed to ask for more than one tunnel mode.\n");
					exit(-1);
				}
				p->iph.protocol = IPPROTO_IPV6;
			} else if (strcmp(*argv, "isatap") == 0) {
				if (p->iph.protocol && p->iph.protocol != IPPROTO_IPV6) {
					fprintf(stderr, "You managed to ask for more than one tunnel mode.\n");
					exit(-1);
				}
				p->iph.protocol = IPPROTO_IPV6;
				isatap++;
			} else {
				fprintf(stderr,"Cannot guess tunnel mode.\n");
				exit(-1);
			}
		} else if (strcmp(*argv, "key") == 0) {
			unsigned uval;
			NEXT_ARG();
			p->i_flags |= GRE_KEY;
			p->o_flags |= GRE_KEY;
			if (strchr(*argv, '.'))
				p->i_key = p->o_key = get_addr32(*argv);
			else {
				if (get_unsigned(&uval, *argv, 0)<0) {
					fprintf(stderr, "invalid value of \"key\"\n");
					exit(-1);
				}
				p->i_key = p->o_key = htonl(uval);
			}
		} else if (strcmp(*argv, "ikey") == 0) {
			unsigned uval;
			NEXT_ARG();
			p->i_flags |= GRE_KEY;
			if (strchr(*argv, '.'))
				p->i_key = get_addr32(*argv);
			else {
				if (get_unsigned(&uval, *argv, 0)<0) {
					fprintf(stderr, "invalid value of \"ikey\"\n");
					exit(-1);
				}
				p->i_key = htonl(uval);
			}
		} else if (strcmp(*argv, "okey") == 0) {
			unsigned uval;
			NEXT_ARG();
			p->o_flags |= GRE_KEY;
			if (strchr(*argv, '.'))
				p->o_key = get_addr32(*argv);
			else {
				if (get_unsigned(&uval, *argv, 0)<0) {
					fprintf(stderr, "invalid value of \"okey\"\n");
					exit(-1);
				}
				p->o_key = htonl(uval);
			}
		} else if (strcmp(*argv, "seq") == 0) {
			p->i_flags |= GRE_SEQ;
			p->o_flags |= GRE_SEQ;
		} else if (strcmp(*argv, "iseq") == 0) {
			p->i_flags |= GRE_SEQ;
		} else if (strcmp(*argv, "oseq") == 0) {
			p->o_flags |= GRE_SEQ;
		} else if (strcmp(*argv, "csum") == 0) {
			p->i_flags |= GRE_CSUM;
			p->o_flags |= GRE_CSUM;
		} else if (strcmp(*argv, "icsum") == 0) {
			p->i_flags |= GRE_CSUM;
		} else if (strcmp(*argv, "ocsum") == 0) {
			p->o_flags |= GRE_CSUM;
		} else if (strcmp(*argv, "nopmtudisc") == 0) {
			p->iph.frag_off = 0;
		} else if (strcmp(*argv, "pmtudisc") == 0) {
			p->iph.frag_off = htons(IP_DF);
		} else if (strcmp(*argv, "remote") == 0) {
			NEXT_ARG();
			if (strcmp(*argv, "any"))
				p->iph.daddr = get_addr32(*argv);
		} else if (strcmp(*argv, "local") == 0) {
			NEXT_ARG();
			if (strcmp(*argv, "any"))
				p->iph.saddr = get_addr32(*argv);
		} else if (strcmp(*argv, "dev") == 0) {
			NEXT_ARG();
			strncpy(medium, *argv, IFNAMSIZ-1);
		} else if (strcmp(*argv, "ttl") == 0 ||
			   strcmp(*argv, "hoplimit") == 0) {
			unsigned uval;
			NEXT_ARG();
			if (strcmp(*argv, "inherit") != 0) {
				if (get_unsigned(&uval, *argv, 0))
					invarg("invalid TTL\n", *argv);
				if (uval > 255)
					invarg("TTL must be <=255\n", *argv);
				p->iph.ttl = uval;
			}
		} else if (strcmp(*argv, "tos") == 0 ||
			   strcmp(*argv, "tclass") == 0 ||
			   matches(*argv, "dsfield") == 0) {
			__u32 uval;
			NEXT_ARG();
			if (strcmp(*argv, "inherit") != 0) {
				if (rtnl_dsfield_a2n(&uval, *argv))
					invarg("bad TOS value", *argv);
				p->iph.tos = uval;
			} else
				p->iph.tos = 1;
		} else {
			if (strcmp(*argv, "name") == 0) {
				NEXT_ARG();
			} else if (matches(*argv, "help") == 0)
				usage();
			if (p->name[0])
				duparg2("name", *argv);
			strncpy(p->name, *argv, IFNAMSIZ);
			if (cmd == SIOCCHGTUNNEL && count == 0) {
				struct ip_tunnel_parm old_p;
				memset(&old_p, 0, sizeof(old_p));
				if (tnl_get_ioctl(*argv, &old_p))
					return -1;
				*p = old_p;
			}
		}
		count++;
		argc--; argv++;
	}


	if (p->iph.protocol == 0) {
		if (memcmp(p->name, "gre", 3) == 0)
			p->iph.protocol = IPPROTO_GRE;
		else if (memcmp(p->name, "ipip", 4) == 0)
			p->iph.protocol = IPPROTO_IPIP;
		else if (memcmp(p->name, "sit", 3) == 0)
			p->iph.protocol = IPPROTO_IPV6;
		else if (memcmp(p->name, "isatap", 6) == 0) {
			p->iph.protocol = IPPROTO_IPV6;
			isatap++;
		}
	}

	if (p->iph.protocol == IPPROTO_IPIP || p->iph.protocol == IPPROTO_IPV6) {
		if ((p->i_flags & GRE_KEY) || (p->o_flags & GRE_KEY)) {
			fprintf(stderr, "Keys are not allowed with ipip and sit.\n");
			return -1;
		}
	}

	if (medium[0]) {
		p->link = tnl_ioctl_get_ifindex(medium);
		if (p->link == 0)
			return -1;
	}

	if (p->i_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) {
		p->i_key = p->iph.daddr;
		p->i_flags |= GRE_KEY;
	}
	if (p->o_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) {
		p->o_key = p->iph.daddr;
		p->o_flags |= GRE_KEY;
	}
	if (IN_MULTICAST(ntohl(p->iph.daddr)) && !p->iph.saddr) {
		fprintf(stderr, "Broadcast tunnel requires a source address.\n");
		return -1;
	}
	if (isatap)
		p->i_flags |= SIT_ISATAP;

	return 0;
}


static int do_add(int cmd, int argc, char **argv)
{
	struct ip_tunnel_parm p;

	if (parse_args(argc, argv, cmd, &p) < 0)
		return -1;

	if (p.iph.ttl && p.iph.frag_off == 0) {
		fprintf(stderr, "ttl != 0 and noptmudisc are incompatible\n");
		return -1;
	}

	switch (p.iph.protocol) {
	case IPPROTO_IPIP:
		return tnl_add_ioctl(cmd, "tunl0", p.name, &p);
	case IPPROTO_GRE:
		return tnl_add_ioctl(cmd, "gre0", p.name, &p);
	case IPPROTO_IPV6:
		return tnl_add_ioctl(cmd, "sit0", p.name, &p);
	default:
		fprintf(stderr, "cannot determine tunnel mode (ipip, gre or sit)\n");
		return -1;
	}
	return -1;
}

static int do_del(int argc, char **argv)
{
	struct ip_tunnel_parm p;

	if (parse_args(argc, argv, SIOCDELTUNNEL, &p) < 0)
		return -1;

	switch (p.iph.protocol) {
	case IPPROTO_IPIP:
		return tnl_del_ioctl("tunl0", p.name, &p);
	case IPPROTO_GRE:
		return tnl_del_ioctl("gre0", p.name, &p);
	case IPPROTO_IPV6:
		return tnl_del_ioctl("sit0", p.name, &p);
	default:
		return tnl_del_ioctl(p.name, p.name, &p);
	}
	return -1;
}

static void print_tunnel(struct ip_tunnel_parm *p)
{
	struct ip_tunnel_6rd ip6rd;
	char s1[1024];
	char s2[1024];
	char s3[64];
	char s4[64];

	memset(&ip6rd, 0, sizeof(ip6rd));
	inet_ntop(AF_INET, &p->i_key, s3, sizeof(s3));
	inet_ntop(AF_INET, &p->o_key, s4, sizeof(s4));

	/* Do not use format_host() for local addr,
	 * symbolic name will not be useful.
	 */
	printf("%s: %s/ip  remote %s  local %s ",
	       p->name,
	       tnl_strproto(p->iph.protocol),
	       p->iph.daddr ? format_host(AF_INET, 4, &p->iph.daddr, s1, sizeof(s1))  : "any",
	       p->iph.saddr ? rt_addr_n2a(AF_INET, 4, &p->iph.saddr, s2, sizeof(s2)) : "any");

	if (p->i_flags & SIT_ISATAP) {
		struct ip_tunnel_prl prl[16];
		int i;
		
		memset(prl, 0, sizeof(prl));
		prl[0].datalen = sizeof(prl) - sizeof(prl[0]);
		prl[0].addr = htonl(INADDR_ANY);
	
		if (!tnl_prl_ioctl(SIOCGETPRL, p->name, prl))
			for (i = 1; i < sizeof(prl) / sizeof(prl[0]); i++)
		{
			if (prl[i].addr != htonl(INADDR_ANY)) {
				printf(" %s %s ", 
					(prl[i].flags & PRL_DEFAULT) ? "pdr" : "pr",
					format_host(AF_INET, 4, &prl[i].addr, s1, sizeof(s1)));
			}
		}
	}

	if (p->link) {
		char *n = tnl_ioctl_get_ifname(p->link);
		if (n)
			printf(" dev %s ", n);
	}

	if (p->iph.ttl)
		printf(" ttl %d ", p->iph.ttl);
	else
		printf(" ttl inherit ");

	if (p->iph.tos) {
		SPRINT_BUF(b1);
		printf(" tos");
		if (p->iph.tos&1)
			printf(" inherit");
		if (p->iph.tos&~1)
			printf("%c%s ", p->iph.tos&1 ? '/' : ' ',
			       rtnl_dsfield_n2a(p->iph.tos&~1, b1, sizeof(b1)));
	}

	if (!(p->iph.frag_off&htons(IP_DF)))
		printf(" nopmtudisc");

	if (!tnl_ioctl_get_6rd(p->name, &ip6rd) && ip6rd.prefixlen) {
		printf(" 6rd-prefix %s/%u ",
		       inet_ntop(AF_INET6, &ip6rd.prefix, s1, sizeof(s1)),
		       ip6rd.prefixlen);
		if (ip6rd.relay_prefix) {
			printf("6rd-relay_prefix %s/%u ",
			       format_host(AF_INET, 4, &ip6rd.relay_prefix, s1, sizeof(s1)),
			       ip6rd.relay_prefixlen);
		}
	}

	if ((p->i_flags&GRE_KEY) && (p->o_flags&GRE_KEY) && p->o_key == p->i_key)
		printf(" key %s", s3);
	else if ((p->i_flags|p->o_flags)&GRE_KEY) {
		if (p->i_flags&GRE_KEY)
			printf(" ikey %s ", s3);
		if (p->o_flags&GRE_KEY)
			printf(" okey %s ", s4);
	}

	if (p->i_flags&GRE_SEQ)
		printf("%s  Drop packets out of sequence.\n", _SL_);
	if (p->i_flags&GRE_CSUM)
		printf("%s  Checksum in received packet is required.", _SL_);
	if (p->o_flags&GRE_SEQ)
		printf("%s  Sequence packets on output.", _SL_);
	if (p->o_flags&GRE_CSUM)
		printf("%s  Checksum output packets.", _SL_);
}

static int do_tunnels_list(struct ip_tunnel_parm *p)
{
	char name[IFNAMSIZ];
	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;
	int type;
	struct ip_tunnel_parm p1;

	char buf[512];
	FILE *fp = fopen("/proc/net/dev", "r");
	if (fp == NULL) {
		perror("fopen");
		return -1;
	}

	fgets(buf, sizeof(buf), fp);
	fgets(buf, sizeof(buf), fp);

	while (fgets(buf, sizeof(buf), fp) != NULL) {
		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");
			return -1;
		}
		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_TUNNEL && type != ARPHRD_IPGRE && type != ARPHRD_SIT)
			continue;
		memset(&p1, 0, sizeof(p1));
		if (tnl_get_ioctl(name, &p1))
			continue;
		if ((p->link && p1.link != p->link) ||
		    (p->name[0] && strcmp(p1.name, p->name)) ||
		    (p->iph.daddr && p1.iph.daddr != p->iph.daddr) ||
		    (p->iph.saddr && p1.iph.saddr != p->iph.saddr) ||
		    (p->i_key && p1.i_key != p->i_key))
			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");
	}
	return 0;
}

static int do_show(int argc, char **argv)
{
	int err;
	struct ip_tunnel_parm p;

	if (parse_args(argc, argv, SIOCGETTUNNEL, &p) < 0)
		return -1;

	switch (p.iph.protocol) {
	case IPPROTO_IPIP:
		err = tnl_get_ioctl(p.name[0] ? p.name : "tunl0", &p);
		break;
	case IPPROTO_GRE:
		err = tnl_get_ioctl(p.name[0] ? p.name : "gre0", &p);
		break;
	case IPPROTO_IPV6:
		err = tnl_get_ioctl(p.name[0] ? p.name : "sit0", &p);
		break;
	default:
		do_tunnels_list(&p);
		return 0;
	}
	if (err)
		return -1;

	print_tunnel(&p);
	printf("\n");
	return 0;
}

static int do_prl(int argc, char **argv)
{
	struct ip_tunnel_prl p;
	int count = 0;
	int devname = 0;
	int cmd = 0;
	char medium[IFNAMSIZ];

	memset(&p, 0, sizeof(p));
	memset(&medium, 0, sizeof(medium));

	while (argc > 0) {
		if (strcmp(*argv, "prl-default") == 0) {
			NEXT_ARG();
			cmd = SIOCADDPRL;
			p.addr = get_addr32(*argv);
			p.flags |= PRL_DEFAULT;
			count++;
		} else if (strcmp(*argv, "prl-nodefault") == 0) {
			NEXT_ARG();
			cmd = SIOCADDPRL;
			p.addr = get_addr32(*argv);
			count++;
		} else if (strcmp(*argv, "prl-delete") == 0) {
			NEXT_ARG();
			cmd = SIOCDELPRL;
			p.addr = get_addr32(*argv);
			count++;
		} else if (strcmp(*argv, "dev") == 0) {
			NEXT_ARG();
			strncpy(medium, *argv, IFNAMSIZ-1);
			devname++;
		} else {
			fprintf(stderr,"%s: Invalid PRL parameter.\n", *argv);
			exit(-1);
		}
		if (count > 1) {
			fprintf(stderr,"One PRL entry at a time.\n");
			exit(-1);
		}
		argc--; argv++;
	}
	if (devname == 0) {
		fprintf(stderr, "Must specify dev.\n");
		exit(-1);
	}

	return tnl_prl_ioctl(cmd, medium, &p);
}

static int do_6rd(int argc, char **argv)
{
	struct ip_tunnel_6rd ip6rd;
	int devname = 0;
	int cmd = 0;
	char medium[IFNAMSIZ];
	inet_prefix prefix;

	memset(&ip6rd, 0, sizeof(ip6rd));
	memset(&medium, 0, sizeof(medium));

	while (argc > 0) {
		if (strcmp(*argv, "6rd-prefix") == 0) {
			NEXT_ARG();
			if (get_prefix(&prefix, *argv, AF_INET6))
				invarg("invalid 6rd_prefix\n", *argv);
			cmd = SIOCADD6RD;
			memcpy(&ip6rd.prefix, prefix.data, 16);
			ip6rd.prefixlen = prefix.bitlen;
		} else if (strcmp(*argv, "6rd-relay_prefix") == 0) {
			NEXT_ARG();
			if (get_prefix(&prefix, *argv, AF_INET))
				invarg("invalid 6rd-relay_prefix\n", *argv);
			cmd = SIOCADD6RD;
			memcpy(&ip6rd.relay_prefix, prefix.data, 4);
			ip6rd.relay_prefixlen = prefix.bitlen;
		} else if (strcmp(*argv, "6rd-reset") == 0) {
			cmd = SIOCDEL6RD;
		} else if (strcmp(*argv, "dev") == 0) {
			NEXT_ARG();
			strncpy(medium, *argv, IFNAMSIZ-1);
			devname++;
		} else {
			fprintf(stderr,"%s: Invalid 6RD parameter.\n", *argv);
			exit(-1);
		}
		argc--; argv++;
	}
	if (devname == 0) {
		fprintf(stderr, "Must specify dev.\n");
		exit(-1);
	}

	return tnl_6rd_ioctl(cmd, medium, &ip6rd);
}

int do_iptunnel(int argc, char **argv)
{
	switch (preferred_family) {
	case AF_UNSPEC:
		preferred_family = AF_INET;
		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);
	}

	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, "prl") == 0)
			return do_prl(argc-1, argv+1);
		if (matches(*argv, "6rd") == 0)
			return do_6rd(argc-1, argv+1);
		if (matches(*argv, "help") == 0)
			usage();
	} else
		return do_show(0, NULL);

	fprintf(stderr, "Command \"%s\" is unknown, try \"ip tunnel help\".\n", *argv);
	exit(-1);
}
Commit	Line	Data
aba5acdf SH	1	/*
	2	* iptunnel.c "ip tunnel"
	3	*
	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.
	8	*
	9	* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
	10	*
aba5acdf SH	11	*/
	12
	13	#include <stdio.h>
	14	#include <stdlib.h>
	15	#include <string.h>
	16	#include <unistd.h>
d9bd1bd9	17	#include <sys/types.h>
aba5acdf	18	#include <sys/socket.h>
7272ddc7	19	#include <arpa/inet.h>
aba5acdf SH	20	#include <sys/ioctl.h>
	21	#include <linux/if.h>
	22	#include <linux/if_arp.h>
7272ddc7	23	#include <linux/ip.h>
aba5acdf SH	24	#include <linux/if_tunnel.h>
	25
	26	#include "rt_names.h"
	27	#include "utils.h"
288384f2	28	#include "ip_common.h"
d9bd1bd9	29	#include "tunnel.h"
aba5acdf SH	30
	31	static void usage(void) __attribute__((noreturn));
	32
	33	static void usage(void)
	34	{
b88215c4	35	fprintf(stderr, "Usage: ip tunnel { add \| change \| del \| show \| prl \| 6rd } [ NAME ]\n");
0bd17929	36	fprintf(stderr, " [ mode { ipip \| gre \| sit \| isatap } ] [ remote ADDR ] [ local ADDR ]\n");
aba5acdf	37	fprintf(stderr, " [ [i\|o]seq ] [ [i\|o]key KEY ] [ [i\|o]csum ]\n");
a07e9912	38	fprintf(stderr, " [ prl-default ADDR ] [ prl-nodefault ADDR ] [ prl-delete ADDR ]\n");
b88215c4	39	fprintf(stderr, " [ 6rd-prefix ADDR ] [ 6rd-relay_prefix ADDR ] [ 6rd-reset ]\n");
aba5acdf SH	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");
	47	exit(-1);
	48	}
	49
aba5acdf SH	50	static int parse_args(int argc, char *argv, int cmd, struct ip_tunnel_parm p)
	51	{
	52	int count = 0;
	53	char medium[IFNAMSIZ];
0bd17929	54	int isatap = 0;
aba5acdf SH	55
	56	memset(p, 0, sizeof(*p));
	57	memset(&medium, 0, sizeof(medium));
	58
	59	p->iph.version = 4;
	60	p->iph.ihl = 5;
	61	#ifndef IP_DF
	62	#define IP_DF 0x4000 /* Flag: "Don't Fragment" */
	63	#endif
	64	p->iph.frag_off = htons(IP_DF);
	65
	66	while (argc > 0) {
	67	if (strcmp(*argv, "mode") == 0) {
	68	NEXT_ARG();
	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");
	73	exit(-1);
	74	}
	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");
	80	exit(-1);
	81	}
	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");
	87	exit(-1);
	88	}
	89	p->iph.protocol = IPPROTO_IPV6;
0bd17929 TF	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");
	93	exit(-1);
	94	}
	95	p->iph.protocol = IPPROTO_IPV6;
	96	isatap++;
aba5acdf SH	97	} else {
	98	fprintf(stderr,"Cannot guess tunnel mode.\n");
	99	exit(-1);
	100	}
	101	} else if (strcmp(*argv, "key") == 0) {
	102	unsigned uval;
	103	NEXT_ARG();
	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);
	108	else {
	109	if (get_unsigned(&uval, *argv, 0)<0) {
	110	fprintf(stderr, "invalid value of \"key\"\n");
	111	exit(-1);
	112	}
	113	p->i_key = p->o_key = htonl(uval);
	114	}
	115	} else if (strcmp(*argv, "ikey") == 0) {
	116	unsigned uval;
	117	NEXT_ARG();
	118	p->i_flags \|= GRE_KEY;
	119	if (strchr(*argv, '.'))
4282c6c5	120	p->i_key = get_addr32(*argv);
aba5acdf SH	121	else {
	122	if (get_unsigned(&uval, *argv, 0)<0) {
	123	fprintf(stderr, "invalid value of \"ikey\"\n");
	124	exit(-1);
	125	}
	126	p->i_key = htonl(uval);
	127	}
	128	} else if (strcmp(*argv, "okey") == 0) {
	129	unsigned uval;
	130	NEXT_ARG();
	131	p->o_flags \|= GRE_KEY;
	132	if (strchr(*argv, '.'))
	133	p->o_key = get_addr32(*argv);
	134	else {
	135	if (get_unsigned(&uval, *argv, 0)<0) {
	136	fprintf(stderr, "invalid value of \"okey\"\n");
	137	exit(-1);
	138	}
	139	p->o_key = htonl(uval);
	140	}
	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) {
	156	p->iph.frag_off = 0;
	157	} else if (strcmp(*argv, "pmtudisc") == 0) {
	158	p->iph.frag_off = htons(IP_DF);
	159	} else if (strcmp(*argv, "remote") == 0) {
	160	NEXT_ARG();
	161	if (strcmp(*argv, "any"))
	162	p->iph.daddr = get_addr32(*argv);
	163	} else if (strcmp(*argv, "local") == 0) {
	164	NEXT_ARG();
	165	if (strcmp(*argv, "any"))
	166	p->iph.saddr = get_addr32(*argv);
	167	} else if (strcmp(*argv, "dev") == 0) {
	168	NEXT_ARG();
	169	strncpy(medium, *argv, IFNAMSIZ-1);
eddde110 YH	170	} else if (strcmp(*argv, "ttl") == 0 \|\|
eddde110 YH	171	strcmp(*argv, "hoplimit") == 0) {
aba5acdf SH	172	unsigned uval;
	173	NEXT_ARG();
	174	if (strcmp(*argv, "inherit") != 0) {
	175	if (get_unsigned(&uval, *argv, 0))
	176	invarg("invalid TTL\n", *argv);
	177	if (uval > 255)
	178	invarg("TTL must be <=255\n", *argv);
	179	p->iph.ttl = uval;
	180	}
	181	} else if (strcmp(*argv, "tos") == 0 \|\|
eddde110	182	strcmp(*argv, "tclass") == 0 \|\|
aba5acdf SH	183	matches(*argv, "dsfield") == 0) {
	184	__u32 uval;
	185	NEXT_ARG();
	186	if (strcmp(*argv, "inherit") != 0) {
	187	if (rtnl_dsfield_a2n(&uval, *argv))
	188	invarg("bad TOS value", *argv);
	189	p->iph.tos = uval;
	190	} else
	191	p->iph.tos = 1;
	192	} else {
	193	if (strcmp(*argv, "name") == 0) {
	194	NEXT_ARG();
1f1ae524	195	} else if (matches(*argv, "help") == 0)
aba5acdf SH	196	usage();
	197	if (p->name[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));
d9bd1bd9	203	if (tnl_get_ioctl(*argv, &old_p))
aba5acdf SH	204	return -1;
	205	*p = old_p;
	206	}
	207	}
	208	count++;
	209	argc--; argv++;
	210	}
	211
	212
	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;
0bd17929 TF	220	else if (memcmp(p->name, "isatap", 6) == 0) {
	221	p->iph.protocol = IPPROTO_IPV6;
	222	isatap++;
	223	}
aba5acdf SH	224	}
	225
	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");
	229	return -1;
	230	}
	231	}
	232
	233	if (medium[0]) {
d9bd1bd9	234	p->link = tnl_ioctl_get_ifindex(medium);
aba5acdf SH	235	if (p->link == 0)
	236	return -1;
	237	}
	238
	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;
	242	}
	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;
	246	}
	247	if (IN_MULTICAST(ntohl(p->iph.daddr)) && !p->iph.saddr) {
	248	fprintf(stderr, "Broadcast tunnel requires a source address.\n");
	249	return -1;
	250	}
eeef12c5	251	if (isatap)
0bd17929	252	p->i_flags \|= SIT_ISATAP;
0bd17929	253
aba5acdf SH	254	return 0;
	255	}
	256
	257
	258	static int do_add(int cmd, int argc, char **argv)
	259	{
	260	struct ip_tunnel_parm p;
	261
	262	if (parse_args(argc, argv, cmd, &p) < 0)
	263	return -1;
	264
	265	if (p.iph.ttl && p.iph.frag_off == 0) {
	266	fprintf(stderr, "ttl != 0 and noptmudisc are incompatible\n");
	267	return -1;
	268	}
	269
	270	switch (p.iph.protocol) {
	271	case IPPROTO_IPIP:
d9bd1bd9	272	return tnl_add_ioctl(cmd, "tunl0", p.name, &p);
aba5acdf	273	case IPPROTO_GRE:
d9bd1bd9	274	return tnl_add_ioctl(cmd, "gre0", p.name, &p);
aba5acdf	275	case IPPROTO_IPV6:
d9bd1bd9	276	return tnl_add_ioctl(cmd, "sit0", p.name, &p);
ae665a52	277	default:
aba5acdf SH	278	fprintf(stderr, "cannot determine tunnel mode (ipip, gre or sit)\n");
	279	return -1;
	280	}
	281	return -1;
	282	}
	283
d9bd1bd9	284	static int do_del(int argc, char **argv)
aba5acdf SH	285	{
	286	struct ip_tunnel_parm p;
	287
	288	if (parse_args(argc, argv, SIOCDELTUNNEL, &p) < 0)
	289	return -1;
	290
	291	switch (p.iph.protocol) {
	292	case IPPROTO_IPIP:
d9bd1bd9	293	return tnl_del_ioctl("tunl0", p.name, &p);
aba5acdf	294	case IPPROTO_GRE:
d9bd1bd9	295	return tnl_del_ioctl("gre0", p.name, &p);
aba5acdf	296	case IPPROTO_IPV6:
d9bd1bd9	297	return tnl_del_ioctl("sit0", p.name, &p);
ae665a52	298	default:
d9bd1bd9	299	return tnl_del_ioctl(p.name, p.name, &p);
aba5acdf SH	300	}
	301	return -1;
	302	}
	303
d9bd1bd9	304	static void print_tunnel(struct ip_tunnel_parm *p)
aba5acdf	305	{
b88215c4	306	struct ip_tunnel_6rd ip6rd;
aba5acdf SH	307	char s1[1024];
	308	char s2[1024];
	309	char s3[64];
	310	char s4[64];
	311
b88215c4	312	memset(&ip6rd, 0, sizeof(ip6rd));
aba5acdf SH	313	inet_ntop(AF_INET, &p->i_key, s3, sizeof(s3));
	314	inet_ntop(AF_INET, &p->o_key, s4, sizeof(s4));
	315
	316	/* Do not use format_host() for local addr,
	317	* symbolic name will not be useful.
	318	*/
	319	printf("%s: %s/ip remote %s local %s ",
	320	p->name,
d9bd1bd9	321	tnl_strproto(p->iph.protocol),
aba5acdf SH	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");
	324
a07e9912 SH	325	if (p->i_flags & SIT_ISATAP) {
	326	struct ip_tunnel_prl prl[16];
	327	int i;
	328
	329	memset(prl, 0, sizeof(prl));
	330	prl[0].datalen = sizeof(prl) - sizeof(prl[0]);
	331	prl[0].addr = htonl(INADDR_ANY);
	332
	333	if (!tnl_prl_ioctl(SIOCGETPRL, p->name, prl))
	334	for (i = 1; i < sizeof(prl) / sizeof(prl[0]); i++)
	335	{
	336	if (prl[i].addr != htonl(INADDR_ANY)) {
	337	printf(" %s %s ",
	338	(prl[i].flags & PRL_DEFAULT) ? "pdr" : "pr",
	339	format_host(AF_INET, 4, &prl[i].addr, s1, sizeof(s1)));
	340	}
	341	}
	342	}
	343
aba5acdf	344	if (p->link) {
d9bd1bd9	345	char *n = tnl_ioctl_get_ifname(p->link);
aba5acdf SH	346	if (n)
	347	printf(" dev %s ", n);
	348	}
	349
	350	if (p->iph.ttl)
	351	printf(" ttl %d ", p->iph.ttl);
	352	else
	353	printf(" ttl inherit ");
ae665a52	354
aba5acdf SH	355	if (p->iph.tos) {
	356	SPRINT_BUF(b1);
	357	printf(" tos");
	358	if (p->iph.tos&1)
	359	printf(" inherit");
	360	if (p->iph.tos&~1)
	361	printf("%c%s ", p->iph.tos&1 ? '/' : ' ',
	362	rtnl_dsfield_n2a(p->iph.tos&~1, b1, sizeof(b1)));
	363	}
	364
	365	if (!(p->iph.frag_off&htons(IP_DF)))
	366	printf(" nopmtudisc");
	367
b88215c4 AC	368	if (!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)),
	371	ip6rd.prefixlen);
	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);
	376	}
	377	}
	378
aba5acdf SH	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);
	386	}
	387
	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_);
	396	}
	397
	398	static int do_tunnels_list(struct ip_tunnel_parm *p)
	399	{
	400	char name[IFNAMSIZ];
	401	unsigned long rx_bytes, rx_packets, rx_errs, rx_drops,
	402	rx_fifo, rx_frame,
	403	tx_bytes, tx_packets, tx_errs, tx_drops,
	404	tx_fifo, tx_colls, tx_carrier, rx_multi;
	405	int type;
	406	struct ip_tunnel_parm p1;
	407
	408	char buf[512];
	409	FILE *fp = fopen("/proc/net/dev", "r");
	410	if (fp == NULL) {
	411	perror("fopen");
	412	return -1;
	413	}
	414
	415	fgets(buf, sizeof(buf), fp);
	416	fgets(buf, sizeof(buf), fp);
	417
	418	while (fgets(buf, sizeof(buf), fp) != NULL) {
	419	char *ptr;
	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");
	424	return -1;
	425	}
	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)
	431	continue;
	432	if (p->name[0] && strcmp(p->name, name))
	433	continue;
d9bd1bd9	434	type = tnl_ioctl_get_iftype(name);
aba5acdf SH	435	if (type == -1) {
	436	fprintf(stderr, "Failed to get type of [%s]\n", name);
	437	continue;
	438	}
	439	if (type != ARPHRD_TUNNEL && type != ARPHRD_IPGRE && type != ARPHRD_SIT)
	440	continue;
	441	memset(&p1, 0, sizeof(p1));
d9bd1bd9	442	if (tnl_get_ioctl(name, &p1))
aba5acdf SH	443	continue;
	444	if ((p->link && p1.link != p->link) \|\|
	445	(p->name[0] && strcmp(p1.name, p->name)) \|\|
	446	(p->iph.daddr && p1.iph.daddr != p->iph.daddr) \|\|
	447	(p->iph.saddr && p1.iph.saddr != p->iph.saddr) \|\|
	448	(p->i_key && p1.i_key != p->i_key))
	449	continue;
	450	print_tunnel(&p1);
	451	if (show_stats) {
	452	printf("%s", _SL_);
	453	printf("RX: Packets Bytes Errors CsumErrs OutOfSeq Mcasts%s", _SL_);
	454	printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-8ld%s",
	455	rx_packets, rx_bytes, rx_errs, rx_frame, rx_fifo, rx_multi, _SL_);
	456	printf("TX: Packets Bytes Errors DeadLoop NoRoute NoBufs%s", _SL_);
	457	printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-6ld",
	458	tx_packets, tx_bytes, tx_errs, tx_colls, tx_carrier, tx_drops);
	459	}
	460	printf("\n");
	461	}
	462	return 0;
	463	}
	464
	465	static int do_show(int argc, char **argv)
	466	{
	467	int err;
	468	struct ip_tunnel_parm p;
	469
	470	if (parse_args(argc, argv, SIOCGETTUNNEL, &p) < 0)
	471	return -1;
	472
	473	switch (p.iph.protocol) {
ae665a52	474	case IPPROTO_IPIP:
d9bd1bd9	475	err = tnl_get_ioctl(p.name[0] ? p.name : "tunl0", &p);
aba5acdf SH	476	break;
aba5acdf SH	477	case IPPROTO_GRE:
d9bd1bd9	478	err = tnl_get_ioctl(p.name[0] ? p.name : "gre0", &p);
aba5acdf SH	479	break;
aba5acdf SH	480	case IPPROTO_IPV6:
d9bd1bd9	481	err = tnl_get_ioctl(p.name[0] ? p.name : "sit0", &p);
aba5acdf SH	482	break;
	483	default:
	484	do_tunnels_list(&p);
	485	return 0;
	486	}
	487	if (err)
	488	return -1;
	489
	490	print_tunnel(&p);
	491	printf("\n");
	492	return 0;
	493	}
	494
a07e9912 SH	495	static int do_prl(int argc, char **argv)
	496	{
	497	struct ip_tunnel_prl p;
	498	int count = 0;
	499	int devname = 0;
	500	int cmd = 0;
	501	char medium[IFNAMSIZ];
	502
	503	memset(&p, 0, sizeof(p));
	504	memset(&medium, 0, sizeof(medium));
	505
	506	while (argc > 0) {
	507	if (strcmp(*argv, "prl-default") == 0) {
	508	NEXT_ARG();
	509	cmd = SIOCADDPRL;
	510	p.addr = get_addr32(*argv);
	511	p.flags \|= PRL_DEFAULT;
	512	count++;
	513	} else if (strcmp(*argv, "prl-nodefault") == 0) {
	514	NEXT_ARG();
	515	cmd = SIOCADDPRL;
	516	p.addr = get_addr32(*argv);
	517	count++;
	518	} else if (strcmp(*argv, "prl-delete") == 0) {
	519	NEXT_ARG();
	520	cmd = SIOCDELPRL;
	521	p.addr = get_addr32(*argv);
	522	count++;
	523	} else if (strcmp(*argv, "dev") == 0) {
	524	NEXT_ARG();
	525	strncpy(medium, *argv, IFNAMSIZ-1);
	526	devname++;
	527	} else {
	528	fprintf(stderr,"%s: Invalid PRL parameter.\n", *argv);
	529	exit(-1);
	530	}
	531	if (count > 1) {
	532	fprintf(stderr,"One PRL entry at a time.\n");
	533	exit(-1);
	534	}
	535	argc--; argv++;
	536	}
	537	if (devname == 0) {
	538	fprintf(stderr, "Must specify dev.\n");
	539	exit(-1);
	540	}
	541
	542	return tnl_prl_ioctl(cmd, medium, &p);
	543	}
	544
b88215c4 AC	545	static int do_6rd(int argc, char **argv)
	546	{
	547	struct ip_tunnel_6rd ip6rd;
	548	int devname = 0;
	549	int cmd = 0;
	550	char medium[IFNAMSIZ];
	551	inet_prefix prefix;
	552
	553	memset(&ip6rd, 0, sizeof(ip6rd));
	554	memset(&medium, 0, sizeof(medium));
	555
	556	while (argc > 0) {
	557	if (strcmp(*argv, "6rd-prefix") == 0) {
	558	NEXT_ARG();
	559	if (get_prefix(&prefix, *argv, AF_INET6))
	560	invarg("invalid 6rd_prefix\n", *argv);
	561	cmd = SIOCADD6RD;
	562	memcpy(&ip6rd.prefix, prefix.data, 16);
	563	ip6rd.prefixlen = prefix.bitlen;
	564	} else if (strcmp(*argv, "6rd-relay_prefix") == 0) {
	565	NEXT_ARG();
	566	if (get_prefix(&prefix, *argv, AF_INET))
	567	invarg("invalid 6rd-relay_prefix\n", *argv);
	568	cmd = SIOCADD6RD;
	569	memcpy(&ip6rd.relay_prefix, prefix.data, 4);
	570	ip6rd.relay_prefixlen = prefix.bitlen;
	571	} else if (strcmp(*argv, "6rd-reset") == 0) {
	572	cmd = SIOCDEL6RD;
	573	} else if (strcmp(*argv, "dev") == 0) {
	574	NEXT_ARG();
	575	strncpy(medium, *argv, IFNAMSIZ-1);
	576	devname++;
	577	} else {
	578	fprintf(stderr,"%s: Invalid 6RD parameter.\n", *argv);
	579	exit(-1);
	580	}
	581	argc--; argv++;
	582	}
	583	if (devname == 0) {
	584	fprintf(stderr, "Must specify dev.\n");
	585	exit(-1);
	586	}
	587
	588	return tnl_6rd_ioctl(cmd, medium, &ip6rd);
	589	}
	590
aba5acdf SH	591	int do_iptunnel(int argc, char **argv)
aba5acdf SH	592	{
d9bd1bd9 MN	593	switch (preferred_family) {
	594	case AF_UNSPEC:
	595	preferred_family = AF_INET;
	596	break;
	597	case AF_INET:
	598	break;
288384f2 MN	599	/*
	600	* This is silly enough but we have no easy way to make it
	601	* protocol-independent because of unarranged structure between
	602	* IPv4 and IPv6.
	603	*/
	604	case AF_INET6:
	605	return do_ip6tunnel(argc, argv);
d9bd1bd9 MN	606	default:
	607	fprintf(stderr, "Unsupported family:%d\n", preferred_family);
	608	exit(-1);
	609	}
	610
aba5acdf SH	611	if (argc > 0) {
	612	if (matches(*argv, "add") == 0)
	613	return do_add(SIOCADDTUNNEL, argc-1, argv+1);
	614	if (matches(*argv, "change") == 0)
	615	return do_add(SIOCCHGTUNNEL, argc-1, argv+1);
	616	if (matches(*argv, "del") == 0)
	617	return do_del(argc-1, argv+1);
	618	if (matches(*argv, "show") == 0 \|\|
	619	matches(*argv, "lst") == 0 \|\|
	620	matches(*argv, "list") == 0)
	621	return do_show(argc-1, argv+1);
a07e9912 SH	622	if (matches(*argv, "prl") == 0)
a07e9912 SH	623	return do_prl(argc-1, argv+1);
b88215c4 AC	624	if (matches(*argv, "6rd") == 0)
b88215c4 AC	625	return do_6rd(argc-1, argv+1);
aba5acdf SH	626	if (matches(*argv, "help") == 0)
	627	usage();
	628	} else
	629	return do_show(0, NULL);
	630
	631	fprintf(stderr, "Command \"%s\" is unknown, try \"ip tunnel help\".\n", *argv);
	632	exit(-1);
	633	}