[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 <net/if.h>
#include <net/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 | vti } ] [ 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  := { STRING | 00..ff | inherit | inherit/STRING | inherit/00..ff }\n");
	fprintf(stderr, "       TTL  := { 1..255 | inherit }\n");
	fprintf(stderr, "       KEY  := { DOTTED_QUAD | NUMBER }\n");
	exit(-1);
}

static void set_tunnel_proto(struct ip_tunnel_parm *p, int proto)
{
	if (p->iph.protocol && p->iph.protocol != proto) {
		fprintf(stderr,"You managed to ask for more than one tunnel mode.\n");
		exit(-1);
	}
	p->iph.protocol = proto;
}

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) {
				set_tunnel_proto(p, IPPROTO_IPIP);
			} else if (strcmp(*argv, "gre") == 0 ||
				   strcmp(*argv, "gre/ip") == 0) {
				set_tunnel_proto(p, IPPROTO_GRE);
			} else if (strcmp(*argv, "sit") == 0 ||
				   strcmp(*argv, "ipv6/ip") == 0) {
				set_tunnel_proto(p, IPPROTO_IPV6);
			} else if (strcmp(*argv, "isatap") == 0) {
				set_tunnel_proto(p, IPPROTO_IPV6);
				isatap++;
			} else if (strcmp(*argv, "vti") == 0) {
				set_tunnel_proto(p, IPPROTO_IPIP);
				p->i_flags |= VTI_ISVTI;
			} else {
				fprintf(stderr,"Unknown tunnel mode \"%s\"\n", *argv);
				exit(-1);
			}
		} else if (strcmp(*argv, "key") == 0) {
			NEXT_ARG();
			p->i_flags |= GRE_KEY;
			p->o_flags |= GRE_KEY;
			p->i_key = p->o_key = tnl_parse_key("key", *argv);
		} else if (strcmp(*argv, "ikey") == 0) {
			NEXT_ARG();
			p->i_flags |= GRE_KEY;
			p->i_key = tnl_parse_key("ikey", *argv);
		} else if (strcmp(*argv, "okey") == 0) {
			NEXT_ARG();
			p->o_flags |= GRE_KEY;
			p->o_key = tnl_parse_key("okey", *argv);
		} 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
				p->iph.daddr = htonl(INADDR_ANY);
		} else if (strcmp(*argv, "local") == 0) {
			NEXT_ARG();
			if (strcmp(*argv, "any"))
				p->iph.saddr = get_addr32(*argv);
			else
				p->iph.saddr = htonl(INADDR_ANY);
		} else if (strcmp(*argv, "dev") == 0) {
			NEXT_ARG();
			strncpy(medium, *argv, IFNAMSIZ - 1);
		} else if (strcmp(*argv, "ttl") == 0 ||
			   strcmp(*argv, "hoplimit") == 0 ||
			   strcmp(*argv, "hlim") == 0) {
			__u8 uval;
			NEXT_ARG();
			if (strcmp(*argv, "inherit") != 0) {
				if (get_u8(&uval, *argv, 0))
					invarg("invalid TTL\n", *argv);
				p->iph.ttl = uval;
			}
		} else if (strcmp(*argv, "tos") == 0 ||
			   strcmp(*argv, "tclass") == 0 ||
			   matches(*argv, "dsfield") == 0) {
			char *dsfield;
			__u32 uval;
			NEXT_ARG();
			dsfield = *argv;
			strsep(&dsfield, "/");
			if (strcmp(*argv, "inherit") != 0) {
				dsfield = *argv;
				p->iph.tos = 0;
			} else
				p->iph.tos = 1;
			if (dsfield) {
				if (rtnl_dsfield_a2n(&uval, dsfield))
					invarg("bad TOS value", *argv);
				p->iph.tos |= uval;
			}
		} 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 - 1);
			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++;
		} else if (memcmp(p->name, "vti", 3) == 0) {
			p->iph.protocol = IPPROTO_IPIP;
			p->i_flags |= VTI_ISVTI;
		}
	}

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

	if (medium[0]) {
		p->link = ll_name_to_index(medium);
		if (p->link == 0) {
			fprintf(stderr, "Cannot find device \"%s\"\n", medium);
			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, "A broadcast tunnel requires a source address\n");
		return -1;
	}
	if (isatap)
		p->i_flags |= SIT_ISATAP;

	return 0;
}

static const char *tnl_defname(const struct ip_tunnel_parm *p)
{
	switch (p->iph.protocol) {
	case IPPROTO_IPIP:
		if (p->i_flags & VTI_ISVTI)
			return "ip_vti0";
		else
			return "tunl0";
	case IPPROTO_GRE:
		return "gre0";
	case IPPROTO_IPV6:
		return "sit0";
	}
	return NULL;
}

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

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

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

	if (!(basedev = tnl_defname(&p))) {
		fprintf(stderr, "cannot determine tunnel mode (ipip, gre, vti or sit)\n");
		return -1;
	}

	return tnl_add_ioctl(cmd, basedev, p.name, &p);
}

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

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

	return tnl_del_ioctl(tnl_defname(&p) ? : p.name, p.name, &p);
}

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

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

	/* 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->iph.protocol == IPPROTO_IPV6 && (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) {
		const char *n = ll_index_to_name(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 (p->iph.protocol == IPPROTO_IPV6 && !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 %u", ntohl(p->i_key));
	else if ((p->i_flags | p->o_flags) & GRE_KEY) {
		if (p->i_flags & GRE_KEY)
			printf(" ikey %u", ntohl(p->i_key));
		if (p->o_flags & GRE_KEY)
			printf(" okey %u", ntohl(p->o_key));
	}

	if (p->i_flags & GRE_SEQ)
		printf("%s  Drop packets out of sequence.", _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 buf[512];
	int err = -1;
	FILE *fp = fopen("/proc/net/dev", "r");
	if (fp == NULL) {
		perror("fopen");
		return -1;
	}

	/* skip header lines */
	if (!fgets(buf, sizeof(buf), fp) ||
	    !fgets(buf, sizeof(buf), fp)) {
		fprintf(stderr, "/proc/net/dev read error\n");
		goto end;
	}

	while (fgets(buf, sizeof(buf), fp) != NULL) {
		char name[IFNAMSIZ];
		int index, 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 ip_tunnel_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 for /proc/net/dev. Giving up.\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;
		index = ll_name_to_index(name);
		if (index == 0)
			continue;
		type = ll_index_to_type(index);
		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");
	}
	err = 0;
 end:
	fclose(fp);
	return err;
}

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

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

	if (!(basedev = tnl_defname(&p)))
		return do_tunnels_list(&p);

	if (tnl_get_ioctl(p.name[0] ? p.name : basedev, &p))
		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,"Invalid PRL parameter \"%s\"\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 device\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,"Invalid 6RD parameter \"%s\"\n", *argv);
			exit(-1);
		}
		argc--; argv++;
	}
	if (devname == 0) {
		fprintf(stderr, "Must specify device\n");
		exit(-1);
	}

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

static int tunnel_mode_is_ipv6(char *tunnel_mode) {
	static const char *ipv6_modes[] = {
		"ipv6/ipv6", "ip6ip6",
		"vti6",
		"ip/ipv6", "ipv4/ipv6", "ipip6", "ip4ip6",
		"ip6gre", "gre/ipv6",
		"any/ipv6", "any"
	};
	int i;

	for (i = 0; i < sizeof(ipv6_modes) / sizeof(ipv6_modes[0]); i++) {
		if (strcmp(ipv6_modes[i], tunnel_mode) == 0)
			return 1;
	}
	return 0;
}

int do_iptunnel(int argc, char **argv)
{
	int i;

	for (i = 0; i < argc - 1; i++) {
		if (strcmp(argv[i], "mode") == 0) {
			if (tunnel_mode_is_ipv6(argv[i + 1]))
				preferred_family = AF_INET6;
			break;
		}
	}
	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 protocol 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, "delete") == 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	20	#include <sys/ioctl.h>
ea71beac SH	21	#include <net/if.h>
ea71beac SH	22	#include <net/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");
eec47608	36	fprintf(stderr, " [ mode { ipip \| gre \| sit \| isatap \| vti } ] [ 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");
e59fd3db	44	fprintf(stderr, " TOS := { STRING \| 00..ff \| inherit \| inherit/STRING \| inherit/00..ff }\n");
aba5acdf SH	45	fprintf(stderr, " TTL := { 1..255 \| inherit }\n");
	46	fprintf(stderr, " KEY := { DOTTED_QUAD \| NUMBER }\n");
	47	exit(-1);
	48	}
	49
2520598a PS	50	static void set_tunnel_proto(struct ip_tunnel_parm *p, int proto)
	51	{
	52	if (p->iph.protocol && p->iph.protocol != proto) {
	53	fprintf(stderr,"You managed to ask for more than one tunnel mode.\n");
	54	exit(-1);
	55	}
	56	p->iph.protocol = proto;
	57	}
	58
aba5acdf SH	59	static int parse_args(int argc, char *argv, int cmd, struct ip_tunnel_parm p)
	60	{
	61	int count = 0;
	62	char medium[IFNAMSIZ];
0bd17929	63	int isatap = 0;
aba5acdf SH	64
	65	memset(p, 0, sizeof(*p));
	66	memset(&medium, 0, sizeof(medium));
	67
	68	p->iph.version = 4;
	69	p->iph.ihl = 5;
	70	#ifndef IP_DF
	71	#define IP_DF 0x4000 /* Flag: "Don't Fragment" */
	72	#endif
	73	p->iph.frag_off = htons(IP_DF);
	74
	75	while (argc > 0) {
	76	if (strcmp(*argv, "mode") == 0) {
	77	NEXT_ARG();
	78	if (strcmp(*argv, "ipip") == 0 \|\|
	79	strcmp(*argv, "ip/ip") == 0) {
2520598a	80	set_tunnel_proto(p, IPPROTO_IPIP);
aba5acdf SH	81	} else if (strcmp(*argv, "gre") == 0 \|\|
aba5acdf SH	82	strcmp(*argv, "gre/ip") == 0) {
2520598a	83	set_tunnel_proto(p, IPPROTO_GRE);
aba5acdf SH	84	} else if (strcmp(*argv, "sit") == 0 \|\|
aba5acdf SH	85	strcmp(*argv, "ipv6/ip") == 0) {
2520598a	86	set_tunnel_proto(p, IPPROTO_IPV6);
0bd17929	87	} else if (strcmp(*argv, "isatap") == 0) {
2520598a	88	set_tunnel_proto(p, IPPROTO_IPV6);
0bd17929	89	isatap++;
eec47608	90	} else if (strcmp(*argv, "vti") == 0) {
2520598a	91	set_tunnel_proto(p, IPPROTO_IPIP);
eec47608	92	p->i_flags \|= VTI_ISVTI;
aba5acdf	93	} else {
14645ec2	94	fprintf(stderr,"Unknown tunnel mode \"%s\"\n", *argv);
aba5acdf SH	95	exit(-1);
	96	}
	97	} else if (strcmp(*argv, "key") == 0) {
aba5acdf SH	98	NEXT_ARG();
	99	p->i_flags \|= GRE_KEY;
	100	p->o_flags \|= GRE_KEY;
a7ed1520	101	p->i_key = p->o_key = tnl_parse_key("key", *argv);
aba5acdf	102	} else if (strcmp(*argv, "ikey") == 0) {
aba5acdf SH	103	NEXT_ARG();
aba5acdf SH	104	p->i_flags \|= GRE_KEY;
a7ed1520	105	p->i_key = tnl_parse_key("ikey", *argv);
aba5acdf	106	} else if (strcmp(*argv, "okey") == 0) {
aba5acdf SH	107	NEXT_ARG();
aba5acdf SH	108	p->o_flags \|= GRE_KEY;
a7ed1520	109	p->o_key = tnl_parse_key("okey", *argv);
aba5acdf SH	110	} else if (strcmp(*argv, "seq") == 0) {
	111	p->i_flags \|= GRE_SEQ;
	112	p->o_flags \|= GRE_SEQ;
	113	} else if (strcmp(*argv, "iseq") == 0) {
	114	p->i_flags \|= GRE_SEQ;
	115	} else if (strcmp(*argv, "oseq") == 0) {
	116	p->o_flags \|= GRE_SEQ;
	117	} else if (strcmp(*argv, "csum") == 0) {
	118	p->i_flags \|= GRE_CSUM;
	119	p->o_flags \|= GRE_CSUM;
	120	} else if (strcmp(*argv, "icsum") == 0) {
	121	p->i_flags \|= GRE_CSUM;
	122	} else if (strcmp(*argv, "ocsum") == 0) {
	123	p->o_flags \|= GRE_CSUM;
	124	} else if (strcmp(*argv, "nopmtudisc") == 0) {
	125	p->iph.frag_off = 0;
	126	} else if (strcmp(*argv, "pmtudisc") == 0) {
	127	p->iph.frag_off = htons(IP_DF);
	128	} else if (strcmp(*argv, "remote") == 0) {
	129	NEXT_ARG();
	130	if (strcmp(*argv, "any"))
	131	p->iph.daddr = get_addr32(*argv);
4e4b7832 TLSC	132	else
4e4b7832 TLSC	133	p->iph.daddr = htonl(INADDR_ANY);
aba5acdf SH	134	} else if (strcmp(*argv, "local") == 0) {
	135	NEXT_ARG();
	136	if (strcmp(*argv, "any"))
	137	p->iph.saddr = get_addr32(*argv);
4e4b7832 TLSC	138	else
4e4b7832 TLSC	139	p->iph.saddr = htonl(INADDR_ANY);
aba5acdf SH	140	} else if (strcmp(*argv, "dev") == 0) {
aba5acdf SH	141	NEXT_ARG();
04ce8d3e	142	strncpy(medium, *argv, IFNAMSIZ - 1);
eddde110	143	} else if (strcmp(*argv, "ttl") == 0 \|\|
0dd4d2b3 PS	144	strcmp(*argv, "hoplimit") == 0 \|\|
	145	strcmp(*argv, "hlim") == 0) {
	146	__u8 uval;
aba5acdf SH	147	NEXT_ARG();
aba5acdf SH	148	if (strcmp(*argv, "inherit") != 0) {
0dd4d2b3	149	if (get_u8(&uval, *argv, 0))
aba5acdf	150	invarg("invalid TTL\n", *argv);
aba5acdf SH	151	p->iph.ttl = uval;
	152	}
	153	} else if (strcmp(*argv, "tos") == 0 \|\|
eddde110	154	strcmp(*argv, "tclass") == 0 \|\|
aba5acdf	155	matches(*argv, "dsfield") == 0) {
e59fd3db	156	char *dsfield;
aba5acdf SH	157	__u32 uval;
aba5acdf SH	158	NEXT_ARG();
e59fd3db DW	159	dsfield = *argv;
e59fd3db DW	160	strsep(&dsfield, "/");
aba5acdf	161	if (strcmp(*argv, "inherit") != 0) {
e59fd3db DW	162	dsfield = *argv;
e59fd3db DW	163	p->iph.tos = 0;
aba5acdf SH	164	} else
aba5acdf SH	165	p->iph.tos = 1;
e59fd3db DW	166	if (dsfield) {
	167	if (rtnl_dsfield_a2n(&uval, dsfield))
	168	invarg("bad TOS value", *argv);
	169	p->iph.tos \|= uval;
	170	}
aba5acdf SH	171	} else {
	172	if (strcmp(*argv, "name") == 0) {
	173	NEXT_ARG();
1f1ae524	174	} else if (matches(*argv, "help") == 0)
aba5acdf SH	175	usage();
	176	if (p->name[0])
	177	duparg2("name", *argv);
f53ecee8	178	strncpy(p->name, *argv, IFNAMSIZ - 1);
aba5acdf SH	179	if (cmd == SIOCCHGTUNNEL && count == 0) {
	180	struct ip_tunnel_parm old_p;
	181	memset(&old_p, 0, sizeof(old_p));
d9bd1bd9	182	if (tnl_get_ioctl(*argv, &old_p))
aba5acdf SH	183	return -1;
	184	*p = old_p;
	185	}
	186	}
	187	count++;
	188	argc--; argv++;
	189	}
	190
	191
	192	if (p->iph.protocol == 0) {
	193	if (memcmp(p->name, "gre", 3) == 0)
	194	p->iph.protocol = IPPROTO_GRE;
	195	else if (memcmp(p->name, "ipip", 4) == 0)
	196	p->iph.protocol = IPPROTO_IPIP;
	197	else if (memcmp(p->name, "sit", 3) == 0)
	198	p->iph.protocol = IPPROTO_IPV6;
0bd17929 TF	199	else if (memcmp(p->name, "isatap", 6) == 0) {
	200	p->iph.protocol = IPPROTO_IPV6;
	201	isatap++;
eec47608 SM	202	} else if (memcmp(p->name, "vti", 3) == 0) {
	203	p->iph.protocol = IPPROTO_IPIP;
	204	p->i_flags \|= VTI_ISVTI;
0bd17929	205	}
aba5acdf SH	206	}
aba5acdf SH	207
1c28bd59 HL	208	if ((p->i_flags & GRE_KEY) \|\| (p->o_flags & GRE_KEY)) {
	209	if (!(p->i_flags & VTI_ISVTI) &&
	210	(p->iph.protocol != IPPROTO_GRE)) {
14645ec2	211	fprintf(stderr, "Keys are not allowed with ipip and sit tunnels\n");
aba5acdf SH	212	return -1;
	213	}
	214	}
	215
	216	if (medium[0]) {
4b3cb962	217	p->link = ll_name_to_index(medium);
0cb6bb51	218	if (p->link == 0) {
6ddb1e8c	219	fprintf(stderr, "Cannot find device \"%s\"\n", medium);
aba5acdf	220	return -1;
0cb6bb51	221	}
aba5acdf SH	222	}
	223
	224	if (p->i_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) {
	225	p->i_key = p->iph.daddr;
	226	p->i_flags \|= GRE_KEY;
	227	}
	228	if (p->o_key == 0 && IN_MULTICAST(ntohl(p->iph.daddr))) {
	229	p->o_key = p->iph.daddr;
	230	p->o_flags \|= GRE_KEY;
	231	}
	232	if (IN_MULTICAST(ntohl(p->iph.daddr)) && !p->iph.saddr) {
14645ec2	233	fprintf(stderr, "A broadcast tunnel requires a source address\n");
aba5acdf SH	234	return -1;
aba5acdf SH	235	}
eeef12c5	236	if (isatap)
0bd17929	237	p->i_flags \|= SIT_ISATAP;
0bd17929	238
aba5acdf SH	239	return 0;
	240	}
	241
c957821b PS	242	static const char tnl_defname(const struct ip_tunnel_parm p)
	243	{
	244	switch (p->iph.protocol) {
	245	case IPPROTO_IPIP:
	246	if (p->i_flags & VTI_ISVTI)
	247	return "ip_vti0";
	248	else
	249	return "tunl0";
	250	case IPPROTO_GRE:
	251	return "gre0";
	252	case IPPROTO_IPV6:
	253	return "sit0";
	254	}
	255	return NULL;
	256	}
aba5acdf SH	257
	258	static int do_add(int cmd, int argc, char **argv)
	259	{
	260	struct ip_tunnel_parm p;
c957821b	261	const char *basedev;
aba5acdf SH	262
	263	if (parse_args(argc, argv, cmd, &p) < 0)
	264	return -1;
	265
	266	if (p.iph.ttl && p.iph.frag_off == 0) {
30d07e9e	267	fprintf(stderr, "ttl != 0 and nopmtudisc are incompatible\n");
aba5acdf SH	268	return -1;
	269	}
	270
c957821b	271	if (!(basedev = tnl_defname(&p))) {
eec47608	272	fprintf(stderr, "cannot determine tunnel mode (ipip, gre, vti or sit)\n");
aba5acdf SH	273	return -1;
aba5acdf SH	274	}
c957821b PS	275
c957821b PS	276	return tnl_add_ioctl(cmd, basedev, p.name, &p);
aba5acdf SH	277	}
aba5acdf SH	278
d9bd1bd9	279	static int do_del(int argc, char **argv)
aba5acdf SH	280	{
	281	struct ip_tunnel_parm p;
	282
	283	if (parse_args(argc, argv, SIOCDELTUNNEL, &p) < 0)
	284	return -1;
	285
c957821b	286	return tnl_del_ioctl(tnl_defname(&p) ? : p.name, p.name, &p);
aba5acdf SH	287	}
aba5acdf SH	288
d9bd1bd9	289	static void print_tunnel(struct ip_tunnel_parm *p)
aba5acdf	290	{
b88215c4	291	struct ip_tunnel_6rd ip6rd;
aba5acdf SH	292	char s1[1024];
aba5acdf SH	293	char s2[1024];
aba5acdf	294
b88215c4	295	memset(&ip6rd, 0, sizeof(ip6rd));
aba5acdf SH	296
	297	/* Do not use format_host() for local addr,
	298	* symbolic name will not be useful.
	299	*/
8de592d0	300	printf("%s: %s/ip remote %s local %s",
aba5acdf	301	p->name,
d9bd1bd9	302	tnl_strproto(p->iph.protocol),
8e8f8de4	303	p->iph.daddr ? format_host(AF_INET, 4, &p->iph.daddr, s1, sizeof(s1)) : "any",
26dcdf3a	304	p->iph.saddr ? rt_addr_n2a(AF_INET, 4, &p->iph.saddr, s2, sizeof(s2)) : "any");
aba5acdf	305
86c00faa	306	if (p->iph.protocol == IPPROTO_IPV6 && (p->i_flags & SIT_ISATAP)) {
a07e9912 SH	307	struct ip_tunnel_prl prl[16];
a07e9912 SH	308	int i;
0612519e	309
a07e9912 SH	310	memset(prl, 0, sizeof(prl));
	311	prl[0].datalen = sizeof(prl) - sizeof(prl[0]);
	312	prl[0].addr = htonl(INADDR_ANY);
0612519e	313
a07e9912 SH	314	if (!tnl_prl_ioctl(SIOCGETPRL, p->name, prl))
	315	for (i = 1; i < sizeof(prl) / sizeof(prl[0]); i++)
	316	{
	317	if (prl[i].addr != htonl(INADDR_ANY)) {
0612519e	318	printf(" %s %s ",
a07e9912 SH	319	(prl[i].flags & PRL_DEFAULT) ? "pdr" : "pr",
	320	format_host(AF_INET, 4, &prl[i].addr, s1, sizeof(s1)));
	321	}
	322	}
	323	}
	324
aba5acdf	325	if (p->link) {
ea71beac	326	const char *n = ll_index_to_name(p->link);
aba5acdf	327	if (n)
8de592d0	328	printf(" dev %s", n);
aba5acdf SH	329	}
	330
	331	if (p->iph.ttl)
8de592d0	332	printf(" ttl %d", p->iph.ttl);
aba5acdf	333	else
8de592d0	334	printf(" ttl inherit");
ae665a52	335
aba5acdf SH	336	if (p->iph.tos) {
	337	SPRINT_BUF(b1);
	338	printf(" tos");
04ce8d3e	339	if (p->iph.tos & 1)
aba5acdf	340	printf(" inherit");
04ce8d3e PS	341	if (p->iph.tos & ~1)
	342	printf("%c%s ", p->iph.tos & 1 ? '/' : ' ',
	343	rtnl_dsfield_n2a(p->iph.tos & ~1, b1, sizeof(b1)));
aba5acdf SH	344	}
aba5acdf SH	345
04ce8d3e	346	if (!(p->iph.frag_off & htons(IP_DF)))
aba5acdf SH	347	printf(" nopmtudisc");
aba5acdf SH	348
3979ef91	349	if (p->iph.protocol == IPPROTO_IPV6 && !tnl_ioctl_get_6rd(p->name, &ip6rd) && ip6rd.prefixlen) {
8de592d0	350	printf(" 6rd-prefix %s/%u",
b88215c4 AC	351	inet_ntop(AF_INET6, &ip6rd.prefix, s1, sizeof(s1)),
	352	ip6rd.prefixlen);
	353	if (ip6rd.relay_prefix) {
8de592d0	354	printf(" 6rd-relay_prefix %s/%u",
b88215c4 AC	355	format_host(AF_INET, 4, &ip6rd.relay_prefix, s1, sizeof(s1)),
	356	ip6rd.relay_prefixlen);
	357	}
	358	}
	359
04ce8d3e	360	if ((p->i_flags & GRE_KEY) && (p->o_flags & GRE_KEY) && p->o_key == p->i_key)
6f4f7c46	361	printf(" key %u", ntohl(p->i_key));
04ce8d3e PS	362	else if ((p->i_flags \| p->o_flags) & GRE_KEY) {
04ce8d3e PS	363	if (p->i_flags & GRE_KEY)
8de592d0	364	printf(" ikey %u", ntohl(p->i_key));
04ce8d3e	365	if (p->o_flags & GRE_KEY)
8de592d0	366	printf(" okey %u", ntohl(p->o_key));
aba5acdf SH	367	}
aba5acdf SH	368
04ce8d3e	369	if (p->i_flags & GRE_SEQ)
4cb8d030	370	printf("%s Drop packets out of sequence.", _SL_);
04ce8d3e	371	if (p->i_flags & GRE_CSUM)
aba5acdf	372	printf("%s Checksum in received packet is required.", _SL_);
04ce8d3e	373	if (p->o_flags & GRE_SEQ)
aba5acdf	374	printf("%s Sequence packets on output.", _SL_);
04ce8d3e	375	if (p->o_flags & GRE_CSUM)
aba5acdf SH	376	printf("%s Checksum output packets.", _SL_);
	377	}
	378
	379	static int do_tunnels_list(struct ip_tunnel_parm *p)
	380	{
aba5acdf	381	char buf[512];
c4527d7b	382	int err = -1;
aba5acdf SH	383	FILE *fp = fopen("/proc/net/dev", "r");
	384	if (fp == NULL) {
	385	perror("fopen");
	386	return -1;
	387	}
	388
38c867d2 SH	389	/* skip header lines */
	390	if (!fgets(buf, sizeof(buf), fp) \|\|
	391	!fgets(buf, sizeof(buf), fp)) {
	392	fprintf(stderr, "/proc/net/dev read error\n");
c4527d7b	393	goto end;
38c867d2	394	}
aba5acdf SH	395
aba5acdf SH	396	while (fgets(buf, sizeof(buf), fp) != NULL) {
c4527d7b	397	char name[IFNAMSIZ];
ea71beac	398	int index, type;
c4527d7b PS	399	unsigned long rx_bytes, rx_packets, rx_errs, rx_drops,
	400	rx_fifo, rx_frame,
	401	tx_bytes, tx_packets, tx_errs, tx_drops,
	402	tx_fifo, tx_colls, tx_carrier, rx_multi;
	403	struct ip_tunnel_parm p1;
aba5acdf	404	char *ptr;
c4527d7b	405
aba5acdf SH	406	buf[sizeof(buf) - 1] = 0;
	407	if ((ptr = strchr(buf, ':')) == NULL \|\|
	408	(*ptr++ = 0, sscanf(buf, "%s", name) != 1)) {
14645ec2	409	fprintf(stderr, "Wrong format for /proc/net/dev. Giving up.\n");
c4527d7b	410	goto end;
aba5acdf SH	411	}
	412	if (sscanf(ptr, "%ld%ld%ld%ld%ld%ld%ld%*d%ld%ld%ld%ld%ld%ld%ld",
	413	&rx_bytes, &rx_packets, &rx_errs, &rx_drops,
	414	&rx_fifo, &rx_frame, &rx_multi,
	415	&tx_bytes, &tx_packets, &tx_errs, &tx_drops,
	416	&tx_fifo, &tx_colls, &tx_carrier) != 14)
	417	continue;
	418	if (p->name[0] && strcmp(p->name, name))
	419	continue;
ea71beac SH	420	index = ll_name_to_index(name);
	421	if (index == 0)
	422	continue;
	423	type = ll_index_to_type(index);
aba5acdf	424	if (type == -1) {
14645ec2	425	fprintf(stderr, "Failed to get type of \"%s\"\n", name);
aba5acdf SH	426	continue;
	427	}
	428	if (type != ARPHRD_TUNNEL && type != ARPHRD_IPGRE && type != ARPHRD_SIT)
	429	continue;
	430	memset(&p1, 0, sizeof(p1));
d9bd1bd9	431	if (tnl_get_ioctl(name, &p1))
aba5acdf SH	432	continue;
	433	if ((p->link && p1.link != p->link) \|\|
	434	(p->name[0] && strcmp(p1.name, p->name)) \|\|
	435	(p->iph.daddr && p1.iph.daddr != p->iph.daddr) \|\|
	436	(p->iph.saddr && p1.iph.saddr != p->iph.saddr) \|\|
	437	(p->i_key && p1.i_key != p->i_key))
	438	continue;
	439	print_tunnel(&p1);
	440	if (show_stats) {
	441	printf("%s", _SL_);
	442	printf("RX: Packets Bytes Errors CsumErrs OutOfSeq Mcasts%s", _SL_);
	443	printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-8ld%s",
	444	rx_packets, rx_bytes, rx_errs, rx_frame, rx_fifo, rx_multi, _SL_);
	445	printf("TX: Packets Bytes Errors DeadLoop NoRoute NoBufs%s", _SL_);
	446	printf(" %-10ld %-12ld %-6ld %-8ld %-8ld %-6ld",
	447	tx_packets, tx_bytes, tx_errs, tx_colls, tx_carrier, tx_drops);
	448	}
	449	printf("\n");
	450	}
c4527d7b PS	451	err = 0;
c4527d7b PS	452	end:
297452a1	453	fclose(fp);
c4527d7b	454	return err;
aba5acdf SH	455	}
	456
	457	static int do_show(int argc, char **argv)
	458	{
aba5acdf	459	struct ip_tunnel_parm p;
c957821b	460	const char *basedev;
aba5acdf	461
ea71beac	462	ll_init_map(&rth);
aba5acdf SH	463	if (parse_args(argc, argv, SIOCGETTUNNEL, &p) < 0)
	464	return -1;
	465
c957821b PS	466	if (!(basedev = tnl_defname(&p)))
	467	return do_tunnels_list(&p);
	468
	469	if (tnl_get_ioctl(p.name[0] ? p.name : basedev, &p))
aba5acdf SH	470	return -1;
	471
	472	print_tunnel(&p);
	473	printf("\n");
	474	return 0;
	475	}
	476
a07e9912 SH	477	static int do_prl(int argc, char **argv)
	478	{
	479	struct ip_tunnel_prl p;
	480	int count = 0;
	481	int devname = 0;
	482	int cmd = 0;
	483	char medium[IFNAMSIZ];
	484
	485	memset(&p, 0, sizeof(p));
	486	memset(&medium, 0, sizeof(medium));
	487
	488	while (argc > 0) {
	489	if (strcmp(*argv, "prl-default") == 0) {
	490	NEXT_ARG();
	491	cmd = SIOCADDPRL;
	492	p.addr = get_addr32(*argv);
	493	p.flags \|= PRL_DEFAULT;
	494	count++;
	495	} else if (strcmp(*argv, "prl-nodefault") == 0) {
	496	NEXT_ARG();
	497	cmd = SIOCADDPRL;
	498	p.addr = get_addr32(*argv);
	499	count++;
	500	} else if (strcmp(*argv, "prl-delete") == 0) {
	501	NEXT_ARG();
	502	cmd = SIOCDELPRL;
	503	p.addr = get_addr32(*argv);
	504	count++;
	505	} else if (strcmp(*argv, "dev") == 0) {
	506	NEXT_ARG();
	507	strncpy(medium, *argv, IFNAMSIZ-1);
	508	devname++;
	509	} else {
14645ec2	510	fprintf(stderr,"Invalid PRL parameter \"%s\"\n", *argv);
a07e9912 SH	511	exit(-1);
	512	}
	513	if (count > 1) {
14645ec2	514	fprintf(stderr,"One PRL entry at a time\n");
a07e9912 SH	515	exit(-1);
	516	}
	517	argc--; argv++;
	518	}
	519	if (devname == 0) {
14645ec2	520	fprintf(stderr, "Must specify device\n");
a07e9912 SH	521	exit(-1);
	522	}
	523
	524	return tnl_prl_ioctl(cmd, medium, &p);
	525	}
	526
b88215c4 AC	527	static int do_6rd(int argc, char **argv)
	528	{
	529	struct ip_tunnel_6rd ip6rd;
	530	int devname = 0;
	531	int cmd = 0;
	532	char medium[IFNAMSIZ];
	533	inet_prefix prefix;
	534
	535	memset(&ip6rd, 0, sizeof(ip6rd));
	536	memset(&medium, 0, sizeof(medium));
	537
	538	while (argc > 0) {
	539	if (strcmp(*argv, "6rd-prefix") == 0) {
	540	NEXT_ARG();
	541	if (get_prefix(&prefix, *argv, AF_INET6))
	542	invarg("invalid 6rd_prefix\n", *argv);
	543	cmd = SIOCADD6RD;
	544	memcpy(&ip6rd.prefix, prefix.data, 16);
	545	ip6rd.prefixlen = prefix.bitlen;
	546	} else if (strcmp(*argv, "6rd-relay_prefix") == 0) {
	547	NEXT_ARG();
	548	if (get_prefix(&prefix, *argv, AF_INET))
	549	invarg("invalid 6rd-relay_prefix\n", *argv);
	550	cmd = SIOCADD6RD;
	551	memcpy(&ip6rd.relay_prefix, prefix.data, 4);
	552	ip6rd.relay_prefixlen = prefix.bitlen;
	553	} else if (strcmp(*argv, "6rd-reset") == 0) {
	554	cmd = SIOCDEL6RD;
	555	} else if (strcmp(*argv, "dev") == 0) {
	556	NEXT_ARG();
	557	strncpy(medium, *argv, IFNAMSIZ-1);
	558	devname++;
	559	} else {
14645ec2	560	fprintf(stderr,"Invalid 6RD parameter \"%s\"\n", *argv);
b88215c4 AC	561	exit(-1);
	562	}
	563	argc--; argv++;
	564	}
	565	if (devname == 0) {
14645ec2	566	fprintf(stderr, "Must specify device\n");
b88215c4 AC	567	exit(-1);
	568	}
	569
	570	return tnl_6rd_ioctl(cmd, medium, &ip6rd);
	571	}
	572
cc9c1dfa KS	573	static int tunnel_mode_is_ipv6(char *tunnel_mode) {
	574	static const char *ipv6_modes[] = {
	575	"ipv6/ipv6", "ip6ip6",
	576	"vti6",
	577	"ip/ipv6", "ipv4/ipv6", "ipip6", "ip4ip6",
	578	"ip6gre", "gre/ipv6",
	579	"any/ipv6", "any"
	580	};
	581	int i;
	582
	583	for (i = 0; i < sizeof(ipv6_modes) / sizeof(ipv6_modes[0]); i++) {
	584	if (strcmp(ipv6_modes[i], tunnel_mode) == 0)
	585	return 1;
	586	}
	587	return 0;
	588	}
	589
aba5acdf SH	590	int do_iptunnel(int argc, char **argv)
aba5acdf SH	591	{
cc9c1dfa KS	592	int i;
	593
	594	for (i = 0; i < argc - 1; i++) {
	595	if (strcmp(argv[i], "mode") == 0) {
	596	if (tunnel_mode_is_ipv6(argv[i + 1]))
	597	preferred_family = AF_INET6;
	598	break;
	599	}
	600	}
d9bd1bd9 MN	601	switch (preferred_family) {
	602	case AF_UNSPEC:
	603	preferred_family = AF_INET;
	604	break;
	605	case AF_INET:
	606	break;
288384f2 MN	607	/*
	608	* This is silly enough but we have no easy way to make it
	609	* protocol-independent because of unarranged structure between
	610	* IPv4 and IPv6.
	611	*/
	612	case AF_INET6:
	613	return do_ip6tunnel(argc, argv);
d9bd1bd9	614	default:
14645ec2	615	fprintf(stderr, "Unsupported protocol family: %d\n", preferred_family);
d9bd1bd9 MN	616	exit(-1);
	617	}
	618
aba5acdf SH	619	if (argc > 0) {
aba5acdf SH	620	if (matches(*argv, "add") == 0)
04ce8d3e	621	return do_add(SIOCADDTUNNEL, argc - 1, argv + 1);
aba5acdf	622	if (matches(*argv, "change") == 0)
04ce8d3e	623	return do_add(SIOCCHGTUNNEL, argc - 1, argv + 1);
6e30461e	624	if (matches(*argv, "delete") == 0)
04ce8d3e	625	return do_del(argc - 1, argv + 1);
aba5acdf SH	626	if (matches(*argv, "show") == 0 \|\|
	627	matches(*argv, "lst") == 0 \|\|
	628	matches(*argv, "list") == 0)
04ce8d3e	629	return do_show(argc - 1, argv + 1);
a07e9912	630	if (matches(*argv, "prl") == 0)
04ce8d3e	631	return do_prl(argc - 1, argv + 1);
b88215c4	632	if (matches(*argv, "6rd") == 0)
04ce8d3e	633	return do_6rd(argc - 1, argv + 1);
aba5acdf SH	634	if (matches(*argv, "help") == 0)
	635	usage();
	636	} else
	637	return do_show(0, NULL);
	638
14645ec2	639	fprintf(stderr, "Command \"%s\" is unknown, try \"ip tunnel help\"\n", *argv);
aba5acdf SH	640	exit(-1);
aba5acdf SH	641	}