X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=ip%2Fxfrm_state.c;fp=ip%2Fxfrm_state.c;h=b5b62146b6cd560f07e9cf237b6308671a677a53;hb=4f7d3057911ebc5df78113896cb02e1b4ffbfabe;hp=0000000000000000000000000000000000000000;hpb=8a59994861a17eb92c11553d88631757ee8e63c3;p=iproute2.git

diff --git a/ip/xfrm_state.c b/ip/xfrm_state.c
new file mode 100644
index 0000000..b5b6214
--- /dev/null
+++ b/ip/xfrm_state.c
@@ -0,0 +1,762 @@
+/* $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+1
+ *
+ *  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 ] [ replay-window SIZE ] [ flag FLAG-LIST ]\n");
+	fprintf(stderr, "        [ encap ENCAP ] [ 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 FLAG_LIST ]\n");
+
+	fprintf(stderr, "ID := [ src ADDR ] [ dst ADDR ] [ proto XFRM_PROTO ] [ spi SPI ]\n");
+	//fprintf(stderr, "XFRM_PROTO := [ esp | ah | comp ]\n");
+	fprintf(stderr, "XFRM_PROTO := [ ");
+	fprintf(stderr, "%s | ", strxf_xfrmproto(IPPROTO_ESP));
+	fprintf(stderr, "%s | ", strxf_xfrmproto(IPPROTO_AH));
+	fprintf(stderr, "%s ", strxf_xfrmproto(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\n");
+	fprintf(stderr, "FLAG := [ noecn | decap-dscp ]\n");
+ 
+        fprintf(stderr, "ENCAP := ENCAP-TYPE SPORT DPORT OADDR\n");
+        fprintf(stderr, "ENCAP-TYPE := espinudp | espinudp-nonike\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 ] [ dev DEV ]\n");
+
+	fprintf(stderr, "UPSPEC := proto PROTO [ [ sport PORT ] [ dport PORT ] |\n");
+	fprintf(stderr, "                        [ type NUMBER ] [ code NUMBER ] ]\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 0
+	/* 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) {
+		/* split two chars "0x" from the top */
+		char *p = key + 2;
+		int plen = slen - 2;
+		int i;
+		int j;
+
+		/* Converting hexadecimal numbered string into real key;
+		 * Convert each two chars into one char(value). If number
+		 * of the length is odd, add zero on the top for rounding.
+		 */
+
+		/* calculate length of the converted values(real key) */
+		len = (plen + 1) / 2;
+		if (len > max)
+			invarg("\"ALGOKEY\" makes buffer overflow\n", key);
+
+		for (i = - (plen % 2), j = 0; j < len; i += 2, j++) {
+			char vbuf[3];
+			char val;
+
+			vbuf[0] = i >= 0 ? p[i] : '0';
+			vbuf[1] = p[i + 1];
+			vbuf[2] = '\0';
+
+			if (get_u8(&val, vbuf, 16))
+				invarg("\"ALGOKEY\" is invalid", key);
+
+			alg->alg_key[j] = val;
+		}
+	} 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 {
+		while (1) {
+			if (strcmp(*argv, "noecn") == 0)
+				*flags |= XFRM_STATE_NOECN;
+			else if (strcmp(*argv, "decap-dscp") == 0)
+				*flags |= XFRM_STATE_DECAP_DSCP;
+			else {
+				PREV_ARG(); /* back track */
+				break;
+			}
+
+			if (!NEXT_ARG_OK())
+				break;
+			NEXT_ARG();
+		}
+	}
+
+	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, "replay-window") == 0) {
+			NEXT_ARG();
+			if (get_u8(&req.xsinfo.replay_window, *argv, 0))
+				invarg("\"replay-window\" value is invalid", *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 if (strcmp(*argv, "encap") == 0) {
+			struct xfrm_encap_tmpl encap;
+			inet_prefix oa;
+		        NEXT_ARG();
+			xfrm_encap_type_parse(&encap.encap_type, &argc, &argv);
+			NEXT_ARG();
+			if (get_u16(&encap.encap_sport, *argv, 0))
+				invarg("\"encap\" sport value is invalid", *argv);
+			encap.encap_sport = htons(encap.encap_sport);
+			NEXT_ARG();
+			if (get_u16(&encap.encap_dport, *argv, 0))
+				invarg("\"encap\" dport value is invalid", *argv);
+			encap.encap_dport = htons(encap.encap_dport);
+			NEXT_ARG();
+			get_addr(&oa, *argv, AF_UNSPEC);
+			memcpy(&encap.encap_oa, &oa.data, sizeof(encap.encap_oa));
+			addattr_l(&req.n, sizeof(req.buf), XFRMA_ENCAP,
+				  (void *)&encap, sizeof(encap));
+		} 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_xfrmproto(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_xfrmproto(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 (xfrm_addr_match(&xsinfo->saddr, &filter.xsinfo.saddr,
+				    filter.id_src_mask))
+			return 0;
+	if (filter.id_dst_mask)
+		if (xfrm_addr_match(&xsinfo->id.daddr, &filter.xsinfo.id.daddr,
+				    filter.id_dst_mask))
+			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);
+}
+
+static int xfrm_state_print(const 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];
+
+	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;
+
+	parse_rtattr(tb, XFRMA_MAX, 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, 1, fp, NULL);
+
+	fprintf(fp, "\t");
+	fprintf(fp, "replay-window %u ", xsinfo->replay_window);
+	if (show_stats > 0)
+		fprintf(fp, "seq 0x%08u ", xsinfo->seq);
+	if (show_stats > 0 || xsinfo->flags) {
+		__u8 flags = xsinfo->flags;
+
+		fprintf(fp, "flag ");
+		XFRM_FLAG_PRINT(fp, flags, XFRM_STATE_NOECN, "noecn");
+		XFRM_FLAG_PRINT(fp, flags, XFRM_STATE_DECAP_DSCP, "decap-dscp");
+		if (flags)
+			fprintf(fp, "%x", flags);
+		if (show_stats > 0)
+			fprintf(fp, " (0x%s)", strxf_mask8(flags));
+	}
+	fprintf(fp, "%s", _SL_);
+
+	xfrm_xfrma_print(tb, 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.
+ */
+static int xfrm_state_keep(const 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;
+
+	if(argc > 0)
+		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);
+}
+
+static int xfrm_state_flush_all(void)
+{
+	struct rtnl_handle rth;
+	struct {
+		struct nlmsghdr			n;
+		struct xfrm_usersa_flush	xsf;
+	} req;
+
+	memset(&req, 0, sizeof(req));
+
+	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsf));
+	req.n.nlmsg_flags = NLM_F_REQUEST;
+	req.n.nlmsg_type = XFRM_MSG_FLUSHSA;
+	req.xsf.proto = IPSEC_PROTO_ANY;
+
+	if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
+		exit(1);
+
+	if (show_stats > 1)
+		fprintf(stderr, "Flush all\n");
+
+	if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
+		exit(2);
+
+	rtnl_close(&rth);
+
+	return 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) {
+		if (argc-1 < 1)
+			return xfrm_state_flush_all();
+		else
+			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);
+}