[mirror_iproute2.git] / ip / xfrm_state.c

/* $USAGI: $ */

/*
 * Copyright (C)2004 USAGI/WIDE Project
 * 
 * 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.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
/*
 * based on iproute.c
 */
/*
 * Authors:
 *	Masahide NAKAMURA @USAGI
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netdb.h>
#include <linux/xfrm.h>
#include "utils.h"
#include "xfrm.h"
#include "ip_common.h"

//#define NLMSG_FLUSH_BUF_SIZE (4096-512)
#define NLMSG_FLUSH_BUF_SIZE 8192

/*
 * Receiving buffer defines:
 * nlmsg
 *   data = struct xfrm_usersa_info
 *   rtattr
 *   rtattr
 *   ... (max count of rtattr is XFRM_MAX_DEPTH)
 *
 *  each rtattr data = struct xfrm_algo(dynamic size) or xfrm_address_t
 */
#define NLMSG_BUF_SIZE 4096
#define RTA_BUF_SIZE 2048
#define XFRM_ALGO_KEY_BUF_SIZE 512

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

static void usage(void)
{
	fprintf(stderr, "Usage: ip xfrm state { add | update } ID [ ALGO-LIST ] [ mode MODE ]\n");
	fprintf(stderr, "        [ reqid REQID ] [ FLAG-LIST ] [ sel SELECTOR ] [ LIMIT-LIST ]\n");

	fprintf(stderr, "Usage: ip xfrm state { delete | get } ID\n");
	fprintf(stderr, "Usage: ip xfrm state { flush | list } [ ID ] [ mode MODE ] [ reqid REQID ]\n");
	fprintf(stderr, "        [ FLAG_LIST ]\n");

	fprintf(stderr, "ID := [ src ADDR ] [ dst ADDR ] [ proto XFRM_PROTO ] [ spi SPI ]\n");
	//fprintf(stderr, "XFRM_PROTO := [ esp | ah | ipcomp ]\n");
	fprintf(stderr, "XFRM_PROTO := [ ");
	fprintf(stderr, "%s | ", strxf_proto(IPPROTO_ESP));
	fprintf(stderr, "%s | ", strxf_proto(IPPROTO_AH));
	fprintf(stderr, "%s ", strxf_proto(IPPROTO_COMP));
	fprintf(stderr, "]\n");

	//fprintf(stderr, "SPI - security parameter index(default=0)\n");

 	fprintf(stderr, "MODE := [ transport | tunnel ](default=transport)\n");
 	//fprintf(stderr, "REQID - number(default=0)\n");

	fprintf(stderr, "FLAG-LIST := [ FLAG-LIST ] [ flag FLAG ]\n");
	fprintf(stderr, "FLAG := [ noecn ]\n");

	fprintf(stderr, "ALGO-LIST := [ ALGO-LIST ] | [ ALGO ]\n");
	fprintf(stderr, "ALGO := ALGO_TYPE ALGO_NAME ALGO_KEY\n");
	fprintf(stderr, "ALGO_TYPE := [ ");
	fprintf(stderr, "%s | ", strxf_algotype(XFRMA_ALG_CRYPT));
	fprintf(stderr, "%s | ", strxf_algotype(XFRMA_ALG_AUTH));
	fprintf(stderr, "%s ", strxf_algotype(XFRMA_ALG_COMP));
	fprintf(stderr, "]\n");

	//fprintf(stderr, "ALGO_NAME - algorithm name\n");
	//fprintf(stderr, "ALGO_KEY - algorithm key\n");

	fprintf(stderr, "SELECTOR := src ADDR[/PLEN] dst ADDR[/PLEN] [ upspec UPSPEC ] [ dev DEV ]\n");

	fprintf(stderr, "UPSPEC := proto PROTO [ sport PORT ] [ dport PORT ]\n");

	//fprintf(stderr, "DEV - device name(default=none)\n");
	fprintf(stderr, "LIMIT-LIST := [ LIMIT-LIST ] | [ limit LIMIT ]\n");
	fprintf(stderr, "LIMIT := [ [time-soft|time-hard|time-use-soft|time-use-hard] SECONDS ] |\n");
	fprintf(stderr, "         [ [byte-soft|byte-hard] SIZE ] | [ [packet-soft|packet-hard] COUNT ]\n");
	exit(-1);
}

static int xfrm_algo_parse(struct xfrm_algo *alg, enum xfrm_attr_type_t type,
			   char *name, char *key, int max)
{
	int len;
	int slen = strlen(key);

#if 1
	/* XXX: verifying both name and key is required! */
	fprintf(stderr, "warning: ALGONAME/ALGOKEY will send to kernel promiscuously!(verifying them isn't implemented yet)\n");
#endif

	strncpy(alg->alg_name, name, sizeof(alg->alg_name));

	if (slen > 2 && strncmp(key, "0x", 2) == 0) {
		/*
		 * XXX: fix me!!
		 */
		union {
			__u64 x;
			unsigned char p[8];
		} val;

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

		if (get_u64(&val.x, key, 16))
			invarg("\"ALGOKEY\" is invalid", key);

		len = (slen - 2) / 2;
		if (len > sizeof(val))
			invarg("\"ALGOKEY\" is invalid: too large", key);

		if (len > 0) {
			int i;

			if (len > max)
				invarg("\"ALGOKEY\" makes buffer overflow\n", key);
			for (i = sizeof(val.p) - 1; i >= 0; i--) {
				int j = sizeof(val.p) - 1 - i;
				alg->alg_key[j] = val.p[i];
			}
		}

	} else {
		len = slen;
		if (len > 0) {
			if (len > max)
				invarg("\"ALGOKEY\" makes buffer overflow\n", key);

			strncpy(alg->alg_key, key, len);
		}
	}

	alg->alg_key_len = len * 8;

	return 0;
}

static int xfrm_state_flag_parse(__u8 *flags, int *argcp, char ***argvp)
{
	int argc = *argcp;
	char **argv = *argvp;
	int len = strlen(*argv);

	if (len > 2 && strncmp(*argv, "0x", 2) == 0) {
		__u8 val = 0;

		if (get_u8(&val, *argv, 16))
			invarg("\"FLAG\" is invalid", *argv);
		*flags = val;
	} else {
		if (strcmp(*argv, "noecn") == 0)
			*flags |= XFRM_STATE_NOECN;
		else
			invarg("\"FLAG\" is invalid", *argv);
	}

	filter.state_flags_mask = XFRM_FILTER_MASK_FULL;

	*argcp = argc;
	*argvp = argv;

	return 0;
}

static int xfrm_state_modify(int cmd, unsigned flags, int argc, char **argv)
{
	struct rtnl_handle rth;
	struct {
		struct nlmsghdr 	n;
		struct xfrm_usersa_info xsinfo;
		char   			buf[RTA_BUF_SIZE];
	} req;
	char *idp = NULL;
	char *ealgop = NULL;
	char *aalgop = NULL;
	char *calgop = NULL;

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

	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsinfo));
	req.n.nlmsg_flags = NLM_F_REQUEST|flags;
	req.n.nlmsg_type = cmd;
	req.xsinfo.family = preferred_family;

	req.xsinfo.lft.soft_byte_limit = XFRM_INF;
	req.xsinfo.lft.hard_byte_limit = XFRM_INF;
	req.xsinfo.lft.soft_packet_limit = XFRM_INF;
	req.xsinfo.lft.hard_packet_limit = XFRM_INF;

	while (argc > 0) {
		if (strcmp(*argv, "mode") == 0) {
			NEXT_ARG();
			xfrm_mode_parse(&req.xsinfo.mode, &argc, &argv);
		} else if (strcmp(*argv, "reqid") == 0) {
			NEXT_ARG();
			xfrm_reqid_parse(&req.xsinfo.reqid, &argc, &argv);
		} else if (strcmp(*argv, "flag") == 0) {
			NEXT_ARG();
			xfrm_state_flag_parse(&req.xsinfo.flags, &argc, &argv);
		} else if (strcmp(*argv, "sel") == 0) {
			NEXT_ARG();
			xfrm_selector_parse(&req.xsinfo.sel, &argc, &argv);
		} else if (strcmp(*argv, "limit") == 0) {
			NEXT_ARG();
			xfrm_lifetime_cfg_parse(&req.xsinfo.lft, &argc, &argv);
		} else {
			/* try to assume ALGO */
			int type = xfrm_algotype_getbyname(*argv);
			switch (type) {
			case XFRMA_ALG_CRYPT:
			case XFRMA_ALG_AUTH:
			case XFRMA_ALG_COMP:
			{
				/* ALGO */
				struct {
					struct xfrm_algo alg;
					char buf[XFRM_ALGO_KEY_BUF_SIZE];
				} alg;
				int len;
				char *name;
				char *key;

				switch (type) {
				case XFRMA_ALG_CRYPT:
					if (ealgop)
						duparg("ALGOTYPE", *argv);
					ealgop = *argv;
					break;
				case XFRMA_ALG_AUTH:
					if (aalgop)
						duparg("ALGOTYPE", *argv);
					aalgop = *argv;
					break;
				case XFRMA_ALG_COMP:
					if (calgop)
						duparg("ALGOTYPE", *argv);
					calgop = *argv;
					break;
				default:
					/* not reached */
					invarg("\"ALGOTYPE\" is invalid\n", *argv);
				}

				if (!NEXT_ARG_OK())
					missarg("ALGONAME");
				NEXT_ARG();
				name = *argv;

				if (!NEXT_ARG_OK())
					missarg("ALGOKEY");
				NEXT_ARG();
				key = *argv;

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

				xfrm_algo_parse((void *)&alg, type, name, key,
						sizeof(alg.buf));
				len = sizeof(struct xfrm_algo) + alg.alg.alg_key_len;

				addattr_l(&req.n, sizeof(req.buf), type,
					  (void *)&alg, len);
				break;
			}
			default:
				/* try to assume ID */
				if (idp)
					invarg("unknown", *argv);
				idp = *argv;

				/* ID */
				xfrm_id_parse(&req.xsinfo.saddr, &req.xsinfo.id,
					      &req.xsinfo.family, 0, &argc, &argv);
				if (preferred_family == AF_UNSPEC)
					preferred_family = req.xsinfo.family;
			}
		}
		argc--; argv++;
	}

	if (!idp) {
		fprintf(stderr, "Not enough information: \"ID\" is required\n");
		exit(1);
	}

	if (ealgop || aalgop || calgop) {
		if (req.xsinfo.id.proto != IPPROTO_ESP &&
		    req.xsinfo.id.proto != IPPROTO_AH &&
		    req.xsinfo.id.proto != IPPROTO_COMP) {
			fprintf(stderr, "\"ALGO\" is invalid with proto=%s\n", strxf_proto(req.xsinfo.id.proto));
			exit(1);
		}
	} else {
		if (req.xsinfo.id.proto == IPPROTO_ESP ||
		    req.xsinfo.id.proto == IPPROTO_AH ||
		    req.xsinfo.id.proto == IPPROTO_COMP) {
			fprintf(stderr, "\"ALGO\" is required with proto=%s\n", strxf_proto(req.xsinfo.id.proto));
			exit (1);
		}
	}

	if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
		exit(1);

	if (req.xsinfo.family == AF_UNSPEC)
		req.xsinfo.family = AF_INET;

	if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
		exit(2);

	rtnl_close(&rth);

	return 0;
}

static int xfrm_state_filter_match(struct xfrm_usersa_info *xsinfo)
{
	if (!filter.use)
		return 1;

	if (filter.id_src_mask)
		if (memcmp(&xsinfo->saddr, &filter.xsinfo.saddr,
			   filter.id_src_mask) != 0)
			return 0;
	if (filter.id_dst_mask)
		if (memcmp(&xsinfo->id.daddr, &filter.xsinfo.id.daddr,
			   filter.id_dst_mask) != 0)
			return 0;
	if ((xsinfo->id.proto^filter.xsinfo.id.proto)&filter.id_proto_mask)
		return 0;
	if ((xsinfo->id.spi^filter.xsinfo.id.spi)&filter.id_spi_mask)
		return 0;
	if ((xsinfo->mode^filter.xsinfo.mode)&filter.mode_mask)
		return 0;
	if ((xsinfo->reqid^filter.xsinfo.reqid)&filter.reqid_mask)
		return 0;
	if (filter.state_flags_mask)
		if ((xsinfo->flags & filter.xsinfo.flags) == 0)
			return 0;

	return 1;
}

static int xfrm_selector_iszero(struct xfrm_selector *s)
{
	struct xfrm_selector s0;

	memset(&s0, 0, sizeof(s0));

	return (memcmp(&s0, s, sizeof(s0)) == 0);
}

int xfrm_state_print(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
{
	FILE *fp = (FILE*)arg;
	struct xfrm_usersa_info *xsinfo = NLMSG_DATA(n);
	int len = n->nlmsg_len;
	struct rtattr * tb[XFRMA_MAX+1];
	int ntb;

	if (n->nlmsg_type != XFRM_MSG_NEWSA &&
	    n->nlmsg_type != XFRM_MSG_DELSA) {
		fprintf(stderr, "Not a state: %08x %08x %08x\n",
			n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
		return 0;
	}

	len -= NLMSG_LENGTH(sizeof(*xsinfo));
	if (len < 0) {
		fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
		return -1;
	}

	if (!xfrm_state_filter_match(xsinfo))
		return 0;

	memset(tb, 0, sizeof(tb));
	ntb = parse_rtattr_byindex(tb, XFRM_MAX_DEPTH, XFRMS_RTA(xsinfo), len);

	if (n->nlmsg_type == XFRM_MSG_DELSA)
		fprintf(fp, "Deleted ");

	xfrm_id_info_print(&xsinfo->saddr, &xsinfo->id, xsinfo->mode,
			   xsinfo->reqid, xsinfo->family, fp, NULL);

	fprintf(fp, "\t");
	fprintf(fp, "replay-window %d ", xsinfo->replay_window);
	if (show_stats > 0)
		fprintf(fp, "seq 0x%08u ", xsinfo->seq);
	if (xsinfo->flags) {
		fprintf(fp, "flag 0x%s", strxf_flags(xsinfo->flags));
		if (show_stats > 0) {
			if (xsinfo->flags) {
				fprintf(fp, "(");
				if (xsinfo->flags & XFRM_STATE_NOECN)
					fprintf(fp, "noecn");
				fprintf(fp, ")");
			}
		}
	}
	fprintf(fp, "%s", _SL_);

	xfrm_xfrma_print(tb, ntb, xsinfo->family, fp, "\t");

	if (!xfrm_selector_iszero(&xsinfo->sel))
		xfrm_selector_print(&xsinfo->sel, xsinfo->family, fp, "\tsel ");

	if (show_stats > 0) {
		xfrm_lifetime_print(&xsinfo->lft, &xsinfo->curlft, fp, "\t");
		xfrm_stats_print(&xsinfo->stats, fp, "\t");
	}

	if (oneline)
		fprintf(fp, "\n");

	return 0;
}

static int xfrm_state_get_or_delete(int argc, char **argv, int delete)
{
	struct rtnl_handle rth;
	struct {
		struct nlmsghdr 	n;
		struct xfrm_usersa_id	xsid;
	} req;
	struct xfrm_id id;
	char *idp = NULL;

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

	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsid));
	req.n.nlmsg_flags = NLM_F_REQUEST;
	req.n.nlmsg_type = delete ? XFRM_MSG_DELSA : XFRM_MSG_GETSA;
	req.xsid.family = preferred_family;

	while (argc > 0) {
		/*
		 * XXX: Source address is not used and ignore it to follow
		 * XXX: a manner of setkey e.g. in the case of deleting/getting
		 * XXX: message of IPsec SA.
		 */
		xfrm_address_t ignore_saddr;

		if (idp)
			invarg("unknown", *argv);
		idp = *argv;

		/* ID */
		memset(&id, 0, sizeof(id));
		xfrm_id_parse(&ignore_saddr, &id, &req.xsid.family, 0,
			      &argc, &argv);

		memcpy(&req.xsid.daddr, &id.daddr, sizeof(req.xsid.daddr));
		req.xsid.spi = id.spi;
		req.xsid.proto = id.proto;

		argc--; argv++;
	}

	if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
		exit(1);

	if (req.xsid.family == AF_UNSPEC)
		req.xsid.family = AF_INET;

	if (delete) {
		if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
			exit(2);
	} else {
		char buf[NLMSG_BUF_SIZE];
		struct nlmsghdr *res_n = (struct nlmsghdr *)buf;

		memset(buf, 0, sizeof(buf));

		if (rtnl_talk(&rth, &req.n, 0, 0, res_n, NULL, NULL) < 0)
			exit(2);

		if (xfrm_state_print(NULL, res_n, (void*)stdout) < 0) {
			fprintf(stderr, "An error :-)\n");
			exit(1);
		}
	}

	rtnl_close(&rth);

	return 0;
}

/*
 * With an existing state of nlmsg, make new nlmsg for deleting the state
 * and store it to buffer.
 */
int xfrm_state_keep(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
{
	struct xfrm_buffer *xb = (struct xfrm_buffer *)arg;
	struct rtnl_handle *rth = xb->rth;
	struct xfrm_usersa_info *xsinfo = NLMSG_DATA(n);
	int len = n->nlmsg_len;
	struct nlmsghdr *new_n;
	struct xfrm_usersa_id *xsid;

	if (n->nlmsg_type != XFRM_MSG_NEWSA) {
		fprintf(stderr, "Not a state: %08x %08x %08x\n",
			n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
		return 0;
	}

	len -= NLMSG_LENGTH(sizeof(*xsinfo));
	if (len < 0) {
		fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
		return -1;
	}

	if (!xfrm_state_filter_match(xsinfo))
		return 0;

	if (xb->offset > xb->size) {
		fprintf(stderr, "Flush buffer overflow\n");
		return -1;
	}

	new_n = (struct nlmsghdr *)(xb->buf + xb->offset);
	new_n->nlmsg_len = NLMSG_LENGTH(sizeof(*xsid));
	new_n->nlmsg_flags = NLM_F_REQUEST;
	new_n->nlmsg_type = XFRM_MSG_DELSA;
	new_n->nlmsg_seq = ++rth->seq;

	xsid = NLMSG_DATA(new_n);
	xsid->family = xsinfo->family;
	memcpy(&xsid->daddr, &xsinfo->id.daddr, sizeof(xsid->daddr));
	xsid->spi = xsinfo->id.spi;
	xsid->proto = xsinfo->id.proto;

	xb->offset += new_n->nlmsg_len;
	xb->nlmsg_count ++;

	return 0;
}

static int xfrm_state_list_or_flush(int argc, char **argv, int flush)
{
	char *idp = NULL;
	struct rtnl_handle rth;

	filter.use = 1;
	filter.xsinfo.family = preferred_family;

	while (argc > 0) {
		if (strcmp(*argv, "mode") == 0) {
			NEXT_ARG();
			xfrm_mode_parse(&filter.xsinfo.mode, &argc, &argv);

			filter.mode_mask = XFRM_FILTER_MASK_FULL;

		} else if (strcmp(*argv, "reqid") == 0) {
			NEXT_ARG();
			xfrm_reqid_parse(&filter.xsinfo.reqid, &argc, &argv);

			filter.reqid_mask = XFRM_FILTER_MASK_FULL;

		} else if (strcmp(*argv, "flag") == 0) {
			NEXT_ARG();
			xfrm_state_flag_parse(&filter.xsinfo.flags, &argc, &argv);

			filter.state_flags_mask = XFRM_FILTER_MASK_FULL;

		} else {
			if (idp)
				invarg("unknown", *argv);
			idp = *argv;

			/* ID */
			xfrm_id_parse(&filter.xsinfo.saddr, &filter.xsinfo.id,
				      &filter.xsinfo.family, 1, &argc, &argv);
			if (preferred_family == AF_UNSPEC)
				preferred_family = filter.xsinfo.family;
		}
		argc--; argv++;
	}

	if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
		exit(1);

	if (flush) {
		struct xfrm_buffer xb;
		char buf[NLMSG_FLUSH_BUF_SIZE];
		int i;

		xb.buf = buf;
		xb.size = sizeof(buf);
		xb.rth = &rth;

		for (i = 0; ; i++) {
			xb.offset = 0;
			xb.nlmsg_count = 0;

			if (show_stats > 1)
				fprintf(stderr, "Flush round = %d\n", i);

			if (rtnl_wilddump_request(&rth, preferred_family, XFRM_MSG_GETSA) < 0) {
				perror("Cannot send dump request");
				exit(1);
			}

			if (rtnl_dump_filter(&rth, xfrm_state_keep, &xb, NULL, NULL) < 0) {
				fprintf(stderr, "Flush terminated\n");
				exit(1);
			}
			if (xb.nlmsg_count == 0) {
				if (show_stats > 1)
					fprintf(stderr, "Flush completed\n");
				break;
			}

			if (rtnl_send(&rth, xb.buf, xb.offset) < 0) {
				perror("Failed to send flush request\n");
				exit(1);
			}
			if (show_stats > 1)
				fprintf(stderr, "Flushed nlmsg count = %d\n", xb.nlmsg_count);

			xb.offset = 0;
			xb.nlmsg_count = 0;
		}

	} else {
		if (rtnl_wilddump_request(&rth, preferred_family, XFRM_MSG_GETSA) < 0) {
			perror("Cannot send dump request");
			exit(1);
		}

		if (rtnl_dump_filter(&rth, xfrm_state_print, stdout, NULL, NULL) < 0) {
			fprintf(stderr, "Dump terminated\n");
			exit(1);
		}
	}

	rtnl_close(&rth);

	exit(0);
}

int do_xfrm_state(int argc, char **argv)
{
	if (argc < 1)
		return xfrm_state_list_or_flush(0, NULL, 0);

	if (matches(*argv, "add") == 0)
		return xfrm_state_modify(XFRM_MSG_NEWSA, 0,
					 argc-1, argv+1);
	if (matches(*argv, "update") == 0)
		return xfrm_state_modify(XFRM_MSG_UPDSA, 0,
					 argc-1, argv+1);
	if (matches(*argv, "delete") == 0 || matches(*argv, "del") == 0)
		return xfrm_state_get_or_delete(argc-1, argv+1, 1);
	if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
	    || matches(*argv, "lst") == 0)
		return xfrm_state_list_or_flush(argc-1, argv+1, 0);
	if (matches(*argv, "get") == 0)
		return xfrm_state_get_or_delete(argc-1, argv+1, 0);
	if (matches(*argv, "flush") == 0)
		return xfrm_state_list_or_flush(argc-1, argv+1, 1);
	if (matches(*argv, "help") == 0)
		usage();
	fprintf(stderr, "Command \"%s\" is unknown, try \"ip xfrm state help\".\n", *argv);
	exit(-1);
}
Commit	Line	Data
c7699875	1	/* $USAGI: $ */
	2
	3	/*
	4	* Copyright (C)2004 USAGI/WIDE Project
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*/
	20	/*
	21	* based on iproute.c
	22	*/
	23	/*
	24	* Authors:
	25	* Masahide NAKAMURA @USAGI
	26	*/
	27
	28	#include <stdio.h>
	29	#include <stdlib.h>
	30	#include <string.h>
	31	#include <netdb.h>
	32	#include <linux/xfrm.h>
	33	#include "utils.h"
	34	#include "xfrm.h"
	35	#include "ip_common.h"
	36
	37	//#define NLMSG_FLUSH_BUF_SIZE (4096-512)
	38	#define NLMSG_FLUSH_BUF_SIZE 8192
	39
	40	/*
	41	* Receiving buffer defines:
	42	* nlmsg
	43	* data = struct xfrm_usersa_info
	44	* rtattr
	45	* rtattr
	46	* ... (max count of rtattr is XFRM_MAX_DEPTH)
	47	*
	48	* each rtattr data = struct xfrm_algo(dynamic size) or xfrm_address_t
	49	*/
	50	#define NLMSG_BUF_SIZE 4096
	51	#define RTA_BUF_SIZE 2048
	52	#define XFRM_ALGO_KEY_BUF_SIZE 512
	53
	54	static void usage(void) __attribute__((noreturn));
	55
	56	static void usage(void)
	57	{
	58	fprintf(stderr, "Usage: ip xfrm state { add \| update } ID [ ALGO-LIST ] [ mode MODE ]\n");
	59	fprintf(stderr, " [ reqid REQID ] [ FLAG-LIST ] [ sel SELECTOR ] [ LIMIT-LIST ]\n");
	60
	61	fprintf(stderr, "Usage: ip xfrm state { delete \| get } ID\n");
	62	fprintf(stderr, "Usage: ip xfrm state { flush \| list } [ ID ] [ mode MODE ] [ reqid REQID ]\n");
	63	fprintf(stderr, " [ FLAG_LIST ]\n");
	64
65	fprintf(stderr, "ID := [ src ADDR ] [ dst ADDR ] [ proto XFRM_PROTO ] [ spi SPI ]\n");
9e566a46	66	//fprintf(stderr, "XFRM_PROTO := [ esp \| ah \| ipcomp ]\n");
	67	fprintf(stderr, "XFRM_PROTO := [ ");
	68	fprintf(stderr, "%s \| ", strxf_proto(IPPROTO_ESP));
	69	fprintf(stderr, "%s \| ", strxf_proto(IPPROTO_AH));
7809c616	70	fprintf(stderr, "%s ", strxf_proto(IPPROTO_COMP));
7809c616	71	fprintf(stderr, "]\n");
9e566a46	72
c7699875	73	//fprintf(stderr, "SPI - security parameter index(default=0)\n");
	74
	75	fprintf(stderr, "MODE := [ transport \| tunnel ](default=transport)\n");
	76	//fprintf(stderr, "REQID - number(default=0)\n");
	77
	78	fprintf(stderr, "FLAG-LIST := [ FLAG-LIST ] [ flag FLAG ]\n");
	79	fprintf(stderr, "FLAG := [ noecn ]\n");
	80
7809c616	81	fprintf(stderr, "ALGO-LIST := [ ALGO-LIST ] \| [ ALGO ]\n");
c7699875	82	fprintf(stderr, "ALGO := ALGO_TYPE ALGO_NAME ALGO_KEY\n");
7809c616	83	fprintf(stderr, "ALGO_TYPE := [ ");
	84	fprintf(stderr, "%s \| ", strxf_algotype(XFRMA_ALG_CRYPT));
	85	fprintf(stderr, "%s \| ", strxf_algotype(XFRMA_ALG_AUTH));
	86	fprintf(stderr, "%s ", strxf_algotype(XFRMA_ALG_COMP));
	87	fprintf(stderr, "]\n");
	88
c7699875	89	//fprintf(stderr, "ALGO_NAME - algorithm name\n");
	90	//fprintf(stderr, "ALGO_KEY - algorithm key\n");
	91
	92	fprintf(stderr, "SELECTOR := src ADDR[/PLEN] dst ADDR[/PLEN] [ upspec UPSPEC ] [ dev DEV ]\n");
	93
	94	fprintf(stderr, "UPSPEC := proto PROTO [ sport PORT ] [ dport PORT ]\n");
	95
	96	//fprintf(stderr, "DEV - device name(default=none)\n");
	97	fprintf(stderr, "LIMIT-LIST := [ LIMIT-LIST ] \| [ limit LIMIT ]\n");
	98	fprintf(stderr, "LIMIT := [ [time-soft\|time-hard\|time-use-soft\|time-use-hard] SECONDS ] \|\n");
	99	fprintf(stderr, " [ [byte-soft\|byte-hard] SIZE ] \| [ [packet-soft\|packet-hard] COUNT ]\n");
	100	exit(-1);
	101	}
	102
	103	static int xfrm_algo_parse(struct xfrm_algo *alg, enum xfrm_attr_type_t type,
	104	char name, char key, int max)
	105	{
	106	int len;
7809c616	107	int slen = strlen(key);
c7699875	108
	109	#if 1
	110	/* XXX: verifying both name and key is required! */
	111	fprintf(stderr, "warning: ALGONAME/ALGOKEY will send to kernel promiscuously!(verifying them isn't implemented yet)\n");
	112	#endif
	113
	114	strncpy(alg->alg_name, name, sizeof(alg->alg_name));
	115
7809c616	116	if (slen > 2 && strncmp(key, "0x", 2) == 0) {
c7699875	117	/*
	118	* XXX: fix me!!
	119	*/
7809c616	120	union {
	121	__u64 x;
	122	unsigned char p[8];
	123	} val;
	124
	125	memset(&val, 0, sizeof(val));
c7699875	126
7809c616	127	if (get_u64(&val.x, key, 16))
c7699875	128	invarg("\"ALGOKEY\" is invalid", key);
c7699875	129
7809c616	130	len = (slen - 2) / 2;
c7699875	131	if (len > sizeof(val))
	132	invarg("\"ALGOKEY\" is invalid: too large", key);
	133
	134	if (len > 0) {
7809c616	135	int i;
7809c616	136
c7699875	137	if (len > max)
c7699875	138	invarg("\"ALGOKEY\" makes buffer overflow\n", key);
7809c616	139	for (i = sizeof(val.p) - 1; i >= 0; i--) {
	140	int j = sizeof(val.p) - 1 - i;
	141	alg->alg_key[j] = val.p[i];
	142	}
c7699875	143	}
	144
	145	} else {
7809c616	146	len = slen;
c7699875	147	if (len > 0) {
	148	if (len > max)
	149	invarg("\"ALGOKEY\" makes buffer overflow\n", key);
	150
	151	strncpy(alg->alg_key, key, len);
	152	}
	153	}
	154
	155	alg->alg_key_len = len * 8;
	156
	157	return 0;
	158	}
	159
	160	static int xfrm_state_flag_parse(__u8 flags, int argcp, char ***argvp)
	161	{
	162	int argc = *argcp;
	163	char *argv = argvp;
9e566a46	164	int len = strlen(*argv);
	165
	166	if (len > 2 && strncmp(*argv, "0x", 2) == 0) {
	167	__u8 val = 0;
c7699875	168
9e566a46	169	if (get_u8(&val, *argv, 16))
	170	invarg("\"FLAG\" is invalid", *argv);
	171	*flags = val;
	172	} else {
	173	if (strcmp(*argv, "noecn") == 0)
	174	*flags \|= XFRM_STATE_NOECN;
	175	else
	176	invarg("\"FLAG\" is invalid", *argv);
	177	}
c7699875	178
	179	filter.state_flags_mask = XFRM_FILTER_MASK_FULL;
	180
	181	*argcp = argc;
	182	*argvp = argv;
	183
	184	return 0;
	185	}
	186
	187	static int xfrm_state_modify(int cmd, unsigned flags, int argc, char **argv)
	188	{
	189	struct rtnl_handle rth;
	190	struct {
	191	struct nlmsghdr n;
	192	struct xfrm_usersa_info xsinfo;
	193	char buf[RTA_BUF_SIZE];
	194	} req;
	195	char *idp = NULL;
	196	char *ealgop = NULL;
	197	char *aalgop = NULL;
	198	char *calgop = NULL;
	199
	200	memset(&req, 0, sizeof(req));
	201
	202	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsinfo));
	203	req.n.nlmsg_flags = NLM_F_REQUEST\|flags;
	204	req.n.nlmsg_type = cmd;
	205	req.xsinfo.family = preferred_family;
	206
	207	req.xsinfo.lft.soft_byte_limit = XFRM_INF;
	208	req.xsinfo.lft.hard_byte_limit = XFRM_INF;
	209	req.xsinfo.lft.soft_packet_limit = XFRM_INF;
	210	req.xsinfo.lft.hard_packet_limit = XFRM_INF;
	211
	212	while (argc > 0) {
7809c616	213	if (strcmp(*argv, "mode") == 0) {
c7699875	214	NEXT_ARG();
	215	xfrm_mode_parse(&req.xsinfo.mode, &argc, &argv);
	216	} else if (strcmp(*argv, "reqid") == 0) {
	217	NEXT_ARG();
	218	xfrm_reqid_parse(&req.xsinfo.reqid, &argc, &argv);
	219	} else if (strcmp(*argv, "flag") == 0) {
	220	NEXT_ARG();
	221	xfrm_state_flag_parse(&req.xsinfo.flags, &argc, &argv);
	222	} else if (strcmp(*argv, "sel") == 0) {
	223	NEXT_ARG();
	224	xfrm_selector_parse(&req.xsinfo.sel, &argc, &argv);
c7699875	225	} else if (strcmp(*argv, "limit") == 0) {
	226	NEXT_ARG();
	227	xfrm_lifetime_cfg_parse(&req.xsinfo.lft, &argc, &argv);
	228	} else {
7809c616	229	/* try to assume ALGO */
	230	int type = xfrm_algotype_getbyname(*argv);
	231	switch (type) {
	232	case XFRMA_ALG_CRYPT:
	233	case XFRMA_ALG_AUTH:
	234	case XFRMA_ALG_COMP:
	235	{
	236	/* ALGO */
	237	struct {
	238	struct xfrm_algo alg;
	239	char buf[XFRM_ALGO_KEY_BUF_SIZE];
	240	} alg;
	241	int len;
	242	char *name;
	243	char *key;
	244
	245	switch (type) {
	246	case XFRMA_ALG_CRYPT:
	247	if (ealgop)
	248	duparg("ALGOTYPE", *argv);
	249	ealgop = *argv;
	250	break;
	251	case XFRMA_ALG_AUTH:
	252	if (aalgop)
	253	duparg("ALGOTYPE", *argv);
	254	aalgop = *argv;
	255	break;
	256	case XFRMA_ALG_COMP:
	257	if (calgop)
	258	duparg("ALGOTYPE", *argv);
	259	calgop = *argv;
	260	break;
	261	default:
	262	/* not reached */
	263	invarg("\"ALGOTYPE\" is invalid\n", *argv);
	264	}
	265
	266	if (!NEXT_ARG_OK())
	267	missarg("ALGONAME");
	268	NEXT_ARG();
	269	name = *argv;
	270
	271	if (!NEXT_ARG_OK())
	272	missarg("ALGOKEY");
	273	NEXT_ARG();
	274	key = *argv;
	275
	276	memset(&alg, 0, sizeof(alg));
	277
	278	xfrm_algo_parse((void *)&alg, type, name, key,
	279	sizeof(alg.buf));
	280	len = sizeof(struct xfrm_algo) + alg.alg.alg_key_len;
	281
	282	addattr_l(&req.n, sizeof(req.buf), type,
	283	(void *)&alg, len);
	284	break;
	285	}
	286	default:
	287	/* try to assume ID */
	288	if (idp)
	289	invarg("unknown", *argv);
	290	idp = *argv;
	291
	292	/* ID */
293	xfrm_id_parse(&req.xsinfo.saddr, &req.xsinfo.id,
294	&req.xsinfo.family, 0, &argc, &argv);
295	if (preferred_family == AF_UNSPEC)
296	preferred_family = req.xsinfo.family;
297	}
c7699875	298	}
	299	argc--; argv++;
	300	}
	301
	302	if (!idp) {
	303	fprintf(stderr, "Not enough information: \"ID\" is required\n");
	304	exit(1);
	305	}
	306
	307	if (ealgop \|\| aalgop \|\| calgop) {
	308	if (req.xsinfo.id.proto != IPPROTO_ESP &&
	309	req.xsinfo.id.proto != IPPROTO_AH &&
	310	req.xsinfo.id.proto != IPPROTO_COMP) {
7809c616	311	fprintf(stderr, "\"ALGO\" is invalid with proto=%s\n", strxf_proto(req.xsinfo.id.proto));
c7699875	312	exit(1);
	313	}
	314	} else {
	315	if (req.xsinfo.id.proto == IPPROTO_ESP \|\|
	316	req.xsinfo.id.proto == IPPROTO_AH \|\|
	317	req.xsinfo.id.proto == IPPROTO_COMP) {
7809c616	318	fprintf(stderr, "\"ALGO\" is required with proto=%s\n", strxf_proto(req.xsinfo.id.proto));
c7699875	319	exit (1);
	320	}
	321	}
	322
	323	if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
	324	exit(1);
	325
	326	if (req.xsinfo.family == AF_UNSPEC)
	327	req.xsinfo.family = AF_INET;
	328
	329	if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
	330	exit(2);
	331
	332	rtnl_close(&rth);
	333
	334	return 0;
	335	}
	336
	337	static int xfrm_state_filter_match(struct xfrm_usersa_info *xsinfo)
	338	{
	339	if (!filter.use)
	340	return 1;
	341
	342	if (filter.id_src_mask)
	343	if (memcmp(&xsinfo->saddr, &filter.xsinfo.saddr,
	344	filter.id_src_mask) != 0)
	345	return 0;
	346	if (filter.id_dst_mask)
	347	if (memcmp(&xsinfo->id.daddr, &filter.xsinfo.id.daddr,
	348	filter.id_dst_mask) != 0)
	349	return 0;
	350	if ((xsinfo->id.proto^filter.xsinfo.id.proto)&filter.id_proto_mask)
	351	return 0;
	352	if ((xsinfo->id.spi^filter.xsinfo.id.spi)&filter.id_spi_mask)
	353	return 0;
	354	if ((xsinfo->mode^filter.xsinfo.mode)&filter.mode_mask)
	355	return 0;
	356	if ((xsinfo->reqid^filter.xsinfo.reqid)&filter.reqid_mask)
	357	return 0;
	358	if (filter.state_flags_mask)
	359	if ((xsinfo->flags & filter.xsinfo.flags) == 0)
	360	return 0;
	361
	362	return 1;
	363	}
	364
7809c616	365	static int xfrm_selector_iszero(struct xfrm_selector *s)
	366	{
	367	struct xfrm_selector s0;
	368
	369	memset(&s0, 0, sizeof(s0));
	370
	371	return (memcmp(&s0, s, sizeof(s0)) == 0);
	372	}
	373
c7699875	374	int xfrm_state_print(struct sockaddr_nl who, struct nlmsghdr n, void *arg)
	375	{
	376	FILE fp = (FILE)arg;
	377	struct xfrm_usersa_info *xsinfo = NLMSG_DATA(n);
	378	int len = n->nlmsg_len;
	379	struct rtattr * tb[XFRMA_MAX+1];
	380	int ntb;
	381
	382	if (n->nlmsg_type != XFRM_MSG_NEWSA &&
	383	n->nlmsg_type != XFRM_MSG_DELSA) {
	384	fprintf(stderr, "Not a state: %08x %08x %08x\n",
	385	n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
	386	return 0;
	387	}
	388
	389	len -= NLMSG_LENGTH(sizeof(*xsinfo));
	390	if (len < 0) {
	391	fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
	392	return -1;
	393	}
	394
	395	if (!xfrm_state_filter_match(xsinfo))
	396	return 0;
	397
	398	memset(tb, 0, sizeof(tb));
	399	ntb = parse_rtattr_byindex(tb, XFRM_MAX_DEPTH, XFRMS_RTA(xsinfo), len);
	400
	401	if (n->nlmsg_type == XFRM_MSG_DELSA)
	402	fprintf(fp, "Deleted ");
	403
	404	xfrm_id_info_print(&xsinfo->saddr, &xsinfo->id, xsinfo->mode,
	405	xsinfo->reqid, xsinfo->family, fp, NULL);
	406
9e566a46	407	fprintf(fp, "\t");
7809c616	408	fprintf(fp, "replay-window %d ", xsinfo->replay_window);
7809c616	409	if (show_stats > 0)
c7699875	410	fprintf(fp, "seq 0x%08u ", xsinfo->seq);
7809c616	411	if (xsinfo->flags) {
	412	fprintf(fp, "flag 0x%s", strxf_flags(xsinfo->flags));
	413	if (show_stats > 0) {
	414	if (xsinfo->flags) {
	415	fprintf(fp, "(");
	416	if (xsinfo->flags & XFRM_STATE_NOECN)
	417	fprintf(fp, "noecn");
	418	fprintf(fp, ")");
	419	}
9e566a46	420	}
9e566a46	421	}
7809c616	422	fprintf(fp, "%s", _SL_);
c7699875	423
	424	xfrm_xfrma_print(tb, ntb, xsinfo->family, fp, "\t");
	425
7809c616	426	if (!xfrm_selector_iszero(&xsinfo->sel))
7809c616	427	xfrm_selector_print(&xsinfo->sel, xsinfo->family, fp, "\tsel ");
c7699875	428
	429	if (show_stats > 0) {
	430	xfrm_lifetime_print(&xsinfo->lft, &xsinfo->curlft, fp, "\t");
	431	xfrm_stats_print(&xsinfo->stats, fp, "\t");
	432	}
	433
7809c616	434	if (oneline)
	435	fprintf(fp, "\n");
	436
c7699875	437	return 0;
	438	}
	439
	440	static int xfrm_state_get_or_delete(int argc, char **argv, int delete)
	441	{
	442	struct rtnl_handle rth;
	443	struct {
	444	struct nlmsghdr n;
	445	struct xfrm_usersa_id xsid;
	446	} req;
	447	struct xfrm_id id;
	448	char *idp = NULL;
	449
	450	memset(&req, 0, sizeof(req));
	451
	452	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsid));
	453	req.n.nlmsg_flags = NLM_F_REQUEST;
	454	req.n.nlmsg_type = delete ? XFRM_MSG_DELSA : XFRM_MSG_GETSA;
	455	req.xsid.family = preferred_family;
	456
	457	while (argc > 0) {
	458	/*
	459	* XXX: Source address is not used and ignore it to follow
	460	* XXX: a manner of setkey e.g. in the case of deleting/getting
	461	* XXX: message of IPsec SA.
	462	*/
	463	xfrm_address_t ignore_saddr;
	464
	465	if (idp)
	466	invarg("unknown", *argv);
	467	idp = *argv;
	468
	469	/* ID */
	470	memset(&id, 0, sizeof(id));
7809c616	471	xfrm_id_parse(&ignore_saddr, &id, &req.xsid.family, 0,
c7699875	472	&argc, &argv);
	473
	474	memcpy(&req.xsid.daddr, &id.daddr, sizeof(req.xsid.daddr));
	475	req.xsid.spi = id.spi;
	476	req.xsid.proto = id.proto;
	477
	478	argc--; argv++;
	479	}
	480
	481	if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
	482	exit(1);
	483
	484	if (req.xsid.family == AF_UNSPEC)
	485	req.xsid.family = AF_INET;
	486
	487	if (delete) {
	488	if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
	489	exit(2);
	490	} else {
	491	char buf[NLMSG_BUF_SIZE];
	492	struct nlmsghdr res_n = (struct nlmsghdr )buf;
	493
	494	memset(buf, 0, sizeof(buf));
	495
	496	if (rtnl_talk(&rth, &req.n, 0, 0, res_n, NULL, NULL) < 0)
	497	exit(2);
	498
	499	if (xfrm_state_print(NULL, res_n, (void*)stdout) < 0) {
	500	fprintf(stderr, "An error :-)\n");
	501	exit(1);
	502	}
	503	}
	504
	505	rtnl_close(&rth);
	506
	507	return 0;
	508	}
	509
	510	/*
	511	* With an existing state of nlmsg, make new nlmsg for deleting the state
	512	* and store it to buffer.
	513	*/
	514	int xfrm_state_keep(struct sockaddr_nl who, struct nlmsghdr n, void *arg)
	515	{
	516	struct xfrm_buffer xb = (struct xfrm_buffer )arg;
	517	struct rtnl_handle *rth = xb->rth;
	518	struct xfrm_usersa_info *xsinfo = NLMSG_DATA(n);
	519	int len = n->nlmsg_len;
	520	struct nlmsghdr *new_n;
	521	struct xfrm_usersa_id *xsid;
	522
	523	if (n->nlmsg_type != XFRM_MSG_NEWSA) {
	524	fprintf(stderr, "Not a state: %08x %08x %08x\n",
	525	n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
	526	return 0;
	527	}
	528
	529	len -= NLMSG_LENGTH(sizeof(*xsinfo));
	530	if (len < 0) {
	531	fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
	532	return -1;
	533	}
	534
	535	if (!xfrm_state_filter_match(xsinfo))
536	return 0;
537
538	if (xb->offset > xb->size) {
539	fprintf(stderr, "Flush buffer overflow\n");
540	return -1;
541	}
542
543	new_n = (struct nlmsghdr *)(xb->buf + xb->offset);
544	new_n->nlmsg_len = NLMSG_LENGTH(sizeof(*xsid));
545	new_n->nlmsg_flags = NLM_F_REQUEST;
546	new_n->nlmsg_type = XFRM_MSG_DELSA;
547	new_n->nlmsg_seq = ++rth->seq;
548
549	xsid = NLMSG_DATA(new_n);
550	xsid->family = xsinfo->family;
551	memcpy(&xsid->daddr, &xsinfo->id.daddr, sizeof(xsid->daddr));
552	xsid->spi = xsinfo->id.spi;
553	xsid->proto = xsinfo->id.proto;
554
555	xb->offset += new_n->nlmsg_len;
556	xb->nlmsg_count ++;
557
558	return 0;
559	}
560
561	static int xfrm_state_list_or_flush(int argc, char **argv, int flush)
562	{
563	char *idp = NULL;
564	struct rtnl_handle rth;
565
566	filter.use = 1;
567	filter.xsinfo.family = preferred_family;
568
569	while (argc > 0) {
570	if (strcmp(*argv, "mode") == 0) {
571	NEXT_ARG();
572	xfrm_mode_parse(&filter.xsinfo.mode, &argc, &argv);
573
574	filter.mode_mask = XFRM_FILTER_MASK_FULL;
575
576	} else if (strcmp(*argv, "reqid") == 0) {
577	NEXT_ARG();
578	xfrm_reqid_parse(&filter.xsinfo.reqid, &argc, &argv);
579
580	filter.reqid_mask = XFRM_FILTER_MASK_FULL;
581
582	} else if (strcmp(*argv, "flag") == 0) {
583	NEXT_ARG();
584	xfrm_state_flag_parse(&filter.xsinfo.flags, &argc, &argv);
585
586	filter.state_flags_mask = XFRM_FILTER_MASK_FULL;
587
588	} else {
589	if (idp)
590	invarg("unknown", *argv);
591	idp = *argv;
592
593	/* ID */
7809c616	594	xfrm_id_parse(&filter.xsinfo.saddr, &filter.xsinfo.id,
7809c616	595	&filter.xsinfo.family, 1, &argc, &argv);
c7699875	596	if (preferred_family == AF_UNSPEC)
	597	preferred_family = filter.xsinfo.family;
	598	}
	599	argc--; argv++;
	600	}
	601
	602	if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
	603	exit(1);
	604
	605	if (flush) {
	606	struct xfrm_buffer xb;
	607	char buf[NLMSG_FLUSH_BUF_SIZE];
	608	int i;
	609
	610	xb.buf = buf;
	611	xb.size = sizeof(buf);
	612	xb.rth = &rth;
	613
	614	for (i = 0; ; i++) {
	615	xb.offset = 0;
	616	xb.nlmsg_count = 0;
	617
	618	if (show_stats > 1)
	619	fprintf(stderr, "Flush round = %d\n", i);
	620
	621	if (rtnl_wilddump_request(&rth, preferred_family, XFRM_MSG_GETSA) < 0) {
	622	perror("Cannot send dump request");
	623	exit(1);
	624	}
	625
	626	if (rtnl_dump_filter(&rth, xfrm_state_keep, &xb, NULL, NULL) < 0) {
	627	fprintf(stderr, "Flush terminated\n");
	628	exit(1);
	629	}
	630	if (xb.nlmsg_count == 0) {
	631	if (show_stats > 1)
	632	fprintf(stderr, "Flush completed\n");
	633	break;
	634	}
	635
	636	if (rtnl_send(&rth, xb.buf, xb.offset) < 0) {
	637	perror("Failed to send flush request\n");
	638	exit(1);
	639	}
	640	if (show_stats > 1)
	641	fprintf(stderr, "Flushed nlmsg count = %d\n", xb.nlmsg_count);
	642
	643	xb.offset = 0;
	644	xb.nlmsg_count = 0;
	645	}
	646
	647	} else {
	648	if (rtnl_wilddump_request(&rth, preferred_family, XFRM_MSG_GETSA) < 0) {
	649	perror("Cannot send dump request");
	650	exit(1);
	651	}
	652
	653	if (rtnl_dump_filter(&rth, xfrm_state_print, stdout, NULL, NULL) < 0) {
	654	fprintf(stderr, "Dump terminated\n");
	655	exit(1);
	656	}
	657	}
	658
	659	rtnl_close(&rth);
660
661	exit(0);
662	}
663
664	int do_xfrm_state(int argc, char **argv)
665	{
666	if (argc < 1)
667	return xfrm_state_list_or_flush(0, NULL, 0);
668
669	if (matches(*argv, "add") == 0)
670	return xfrm_state_modify(XFRM_MSG_NEWSA, 0,
671	argc-1, argv+1);
672	if (matches(*argv, "update") == 0)
673	return xfrm_state_modify(XFRM_MSG_UPDSA, 0,
674	argc-1, argv+1);
675	if (matches(argv, "delete") == 0 \|\| matches(argv, "del") == 0)
676	return xfrm_state_get_or_delete(argc-1, argv+1, 1);
677	if (matches(argv, "list") == 0 \|\| matches(argv, "show") == 0
678	\|\| matches(*argv, "lst") == 0)
679	return xfrm_state_list_or_flush(argc-1, argv+1, 0);
680	if (matches(*argv, "get") == 0)
681	return xfrm_state_get_or_delete(argc-1, argv+1, 0);
682	if (matches(*argv, "flush") == 0)
683	return xfrm_state_list_or_flush(argc-1, argv+1, 1);
684	if (matches(*argv, "help") == 0)
685	usage();
686	fprintf(stderr, "Command \"%s\" is unknown, try \"ip xfrm state help\".\n", *argv);
687	exit(-1);
688	}