X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=ip%2Fxfrm_policy.c;fp=ip%2Fxfrm_policy.c;h=c1331a420acde88a4502cb3c2ad236c3a21b8c80;hb=4f7d3057911ebc5df78113896cb02e1b4ffbfabe;hp=0000000000000000000000000000000000000000;hpb=8a59994861a17eb92c11553d88631757ee8e63c3;p=iproute2.git

diff --git a/ip/xfrm_policy.c b/ip/xfrm_policy.c
new file mode 100644
index 0000000..c1331a4
--- /dev/null
+++ b/ip/xfrm_policy.c
@@ -0,0 +1,736 @@
+/* $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/netlink.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_userpolicy_info
+ *   rtattr
+ *     data = struct xfrm_user_tmpl[]
+ */
+#define NLMSG_BUF_SIZE 4096
+#define RTA_BUF_SIZE 2048
+#define XFRM_TMPLS_BUF_SIZE 1024
+
+static void usage(void) __attribute__((noreturn));
+
+static void usage(void)
+{
+	fprintf(stderr, "Usage: ip xfrm policy { add | update } dir DIR SELECTOR [ index INDEX ] \n");
+	fprintf(stderr, "        [ action ACTION ] [ priority PRIORITY ] [ LIMIT-LIST ] [ TMPL-LIST ]\n");
+	fprintf(stderr, "Usage: ip xfrm policy { delete | get } dir DIR [ SELECTOR | index INDEX ]\n");
+	fprintf(stderr, "Usage: ip xfrm policy { flush | list } [ dir DIR ] [ SELECTOR ]\n");
+	fprintf(stderr, "        [ index INDEX ] [ action ACTION ] [ priority PRIORITY ]\n");
+	fprintf(stderr, "DIR := [ in | out | fwd ]\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, "ACTION := [ allow | block ](default=allow)\n");
+
+	//fprintf(stderr, "PRIORITY - priority value(default=0)\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] NUMBER ]\n");
+
+	fprintf(stderr, "TMPL-LIST := [ TMPL-LIST ] | [ tmpl TMPL ]\n");
+	fprintf(stderr, "TMPL := ID [ mode MODE ] [ reqid REQID ] [ level LEVEL ]\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, "MODE := [ transport | tunnel ](default=transport)\n");
+ 	//fprintf(stderr, "REQID - number(default=0)\n");
+	fprintf(stderr, "LEVEL := [ required | use ](default=required)\n");
+
+	exit(-1);
+}
+
+static int xfrm_policy_dir_parse(__u8 *dir, int *argcp, char ***argvp)
+{
+	int argc = *argcp;
+	char **argv = *argvp;
+
+	if (strcmp(*argv, "in") == 0)
+		*dir = XFRM_POLICY_IN;
+	else if (strcmp(*argv, "out") == 0)
+		*dir = XFRM_POLICY_OUT;
+	else if (strcmp(*argv, "fwd") == 0)
+		*dir = XFRM_POLICY_FWD;
+	else
+		invarg("\"DIR\" is invalid", *argv);
+
+	*argcp = argc;
+	*argvp = argv;
+
+	return 0;
+}
+
+static int xfrm_tmpl_parse(struct xfrm_user_tmpl *tmpl,
+			   int *argcp, char ***argvp)
+{
+	int argc = *argcp;
+	char **argv = *argvp;
+	char *idp = NULL;
+
+	while (1) {
+		if (strcmp(*argv, "mode") == 0) {
+			NEXT_ARG();
+			xfrm_mode_parse(&tmpl->mode,  &argc, &argv);
+		} else if (strcmp(*argv, "reqid") == 0) {
+			NEXT_ARG();
+			xfrm_reqid_parse(&tmpl->reqid, &argc, &argv);
+		} else if (strcmp(*argv, "level") == 0) {
+			NEXT_ARG();
+
+			if (strcmp(*argv, "required") == 0)
+				tmpl->optional = 0;
+			else if (strcmp(*argv, "use") == 0)
+				tmpl->optional = 1;
+			else
+				invarg("\"LEVEL\" is invalid\n", *argv);
+
+		} else {
+			if (idp) {
+				PREV_ARG(); /* back track */
+				break;
+			}
+			idp = *argv;
+			xfrm_id_parse(&tmpl->saddr, &tmpl->id, &tmpl->family,
+				      0, &argc, &argv);
+			if (preferred_family == AF_UNSPEC)
+				preferred_family = tmpl->family;
+		}
+
+		if (!NEXT_ARG_OK())
+			break;
+
+		NEXT_ARG();
+	}
+	if (argc == *argcp)
+		missarg("TMPL");
+
+	*argcp = argc;
+	*argvp = argv;
+
+	return 0;
+}
+
+static int xfrm_policy_modify(int cmd, unsigned flags, int argc, char **argv)
+{
+	struct rtnl_handle rth;
+	struct {
+		struct nlmsghdr			n;
+		struct xfrm_userpolicy_info	xpinfo;
+		char				buf[RTA_BUF_SIZE];
+	} req;
+	char *dirp = NULL;
+	char *selp = NULL;
+	char tmpls_buf[XFRM_TMPLS_BUF_SIZE];
+	int tmpls_len = 0;
+
+	memset(&req, 0, sizeof(req));
+	memset(&tmpls_buf, 0, sizeof(tmpls_buf));
+
+	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xpinfo));
+	req.n.nlmsg_flags = NLM_F_REQUEST|flags;
+	req.n.nlmsg_type = cmd;
+	req.xpinfo.sel.family = preferred_family;
+
+	req.xpinfo.lft.soft_byte_limit = XFRM_INF;
+	req.xpinfo.lft.hard_byte_limit = XFRM_INF;
+	req.xpinfo.lft.soft_packet_limit = XFRM_INF;
+	req.xpinfo.lft.hard_packet_limit = XFRM_INF;
+
+	while (argc > 0) {
+		if (strcmp(*argv, "dir") == 0) {
+			if (dirp)
+				duparg("dir", *argv);
+			dirp = *argv;
+
+			NEXT_ARG();
+			xfrm_policy_dir_parse(&req.xpinfo.dir, &argc, &argv);
+
+			filter.dir_mask = XFRM_FILTER_MASK_FULL;
+
+		} else if (strcmp(*argv, "index") == 0) {
+			NEXT_ARG();
+			if (get_u32(&req.xpinfo.index, *argv, 0))
+				invarg("\"INDEX\" is invalid", *argv);
+
+			filter.index_mask = XFRM_FILTER_MASK_FULL;
+
+		} else if (strcmp(*argv, "action") == 0) {
+			NEXT_ARG();
+			if (strcmp(*argv, "allow") == 0)
+				req.xpinfo.action = XFRM_POLICY_ALLOW;
+			else if (strcmp(*argv, "block") == 0)
+				req.xpinfo.action = XFRM_POLICY_BLOCK;
+			else
+				invarg("\"action\" value is invalid\n", *argv);
+
+			filter.action_mask = XFRM_FILTER_MASK_FULL;
+
+		} else if (strcmp(*argv, "priority") == 0) {
+			NEXT_ARG();
+			if (get_u32(&req.xpinfo.priority, *argv, 0))
+				invarg("\"PRIORITY\" is invalid", *argv);
+
+			filter.priority_mask = XFRM_FILTER_MASK_FULL;
+
+		} else if (strcmp(*argv, "limit") == 0) {
+			NEXT_ARG();
+			xfrm_lifetime_cfg_parse(&req.xpinfo.lft, &argc, &argv);
+		} else if (strcmp(*argv, "tmpl") == 0) {
+			struct xfrm_user_tmpl *tmpl;
+
+			if (tmpls_len + sizeof(*tmpl) > sizeof(tmpls_buf)) {
+				fprintf(stderr, "Too many tmpls: buffer overflow\n");
+				exit(1);
+			}
+			tmpl = (struct xfrm_user_tmpl *)((char *)tmpls_buf + tmpls_len);
+
+			tmpl->family = preferred_family;
+			tmpl->aalgos = (~(__u32)0);
+			tmpl->ealgos = (~(__u32)0);
+			tmpl->calgos = (~(__u32)0);
+
+			NEXT_ARG();
+			xfrm_tmpl_parse(tmpl, &argc, &argv);
+
+			tmpls_len += sizeof(*tmpl);
+		} else {
+			if (selp)
+				duparg("unknown", *argv);
+			selp = *argv;
+
+			xfrm_selector_parse(&req.xpinfo.sel, &argc, &argv);
+			if (preferred_family == AF_UNSPEC)
+				preferred_family = req.xpinfo.sel.family;
+		}
+
+		argc--; argv++;
+	}
+
+	if (!dirp) {
+		fprintf(stderr, "Not enough information: \"DIR\" is required.\n");
+		exit(1);
+	}
+
+	if (tmpls_len > 0) {
+		addattr_l(&req.n, sizeof(req), XFRMA_TMPL,
+			  (void *)tmpls_buf, tmpls_len);
+	}
+
+	if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
+		exit(1);
+
+	if (req.xpinfo.sel.family == AF_UNSPEC)
+		req.xpinfo.sel.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_policy_filter_match(struct xfrm_userpolicy_info *xpinfo)
+{
+	if (!filter.use)
+		return 1;
+
+	if ((xpinfo->dir^filter.xpinfo.dir)&filter.dir_mask)
+		return 0;
+
+	if (filter.sel_src_mask) {
+		if (xfrm_addr_match(&xpinfo->sel.saddr, &filter.xpinfo.sel.saddr,
+				    filter.sel_src_mask))
+			return 0;
+	}
+
+	if (filter.sel_dst_mask) {
+		if (xfrm_addr_match(&xpinfo->sel.daddr, &filter.xpinfo.sel.daddr,
+				    filter.sel_dst_mask))
+			return 0;
+	}
+
+	if ((xpinfo->sel.ifindex^filter.xpinfo.sel.ifindex)&filter.sel_dev_mask)
+		return 0;
+
+	if ((xpinfo->sel.proto^filter.xpinfo.sel.proto)&filter.upspec_proto_mask)
+		return 0;
+
+	if (filter.upspec_sport_mask) {
+		if ((xpinfo->sel.sport^filter.xpinfo.sel.sport)&filter.upspec_sport_mask)
+			return 0;
+	}
+
+	if (filter.upspec_dport_mask) {
+		if ((xpinfo->sel.dport^filter.xpinfo.sel.dport)&filter.upspec_dport_mask)
+			return 0;
+	}
+
+	if ((xpinfo->index^filter.xpinfo.index)&filter.index_mask)
+		return 0;
+
+	if ((xpinfo->action^filter.xpinfo.action)&filter.action_mask)
+		return 0;
+
+	if ((xpinfo->priority^filter.xpinfo.priority)&filter.priority_mask)
+		return 0;
+
+	return 1;
+}
+
+static int xfrm_policy_print(const struct sockaddr_nl *who, 
+			     struct nlmsghdr *n, void *arg)
+{
+	FILE *fp = (FILE*)arg;
+	struct xfrm_userpolicy_info *xpinfo = NLMSG_DATA(n);
+	int len = n->nlmsg_len;
+	struct rtattr * tb[XFRMA_MAX+1];
+
+	if (n->nlmsg_type != XFRM_MSG_NEWPOLICY &&
+	    n->nlmsg_type != XFRM_MSG_DELPOLICY) {
+		fprintf(stderr, "Not a policy: %08x %08x %08x\n",
+			n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
+		return 0;
+	}
+
+	len -= NLMSG_LENGTH(sizeof(*xpinfo));
+	if (len < 0) {
+		fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
+		return -1;
+	}
+
+	if (!xfrm_policy_filter_match(xpinfo))
+		return 0;
+
+	parse_rtattr(tb, XFRMA_MAX, XFRMP_RTA(xpinfo), len);
+
+	if (n->nlmsg_type == XFRM_MSG_DELPOLICY)
+		fprintf(fp, "Deleted ");
+
+	xfrm_selector_print(&xpinfo->sel, preferred_family, fp, NULL);
+
+	fprintf(fp, "\t");
+	fprintf(fp, "dir ");
+	switch (xpinfo->dir) {
+	case XFRM_POLICY_IN:
+		fprintf(fp, "in");
+		break;
+	case XFRM_POLICY_OUT:
+		fprintf(fp, "out");
+		break;
+	case XFRM_POLICY_FWD:
+		fprintf(fp, "fwd");
+		break;
+	default:
+		fprintf(fp, "%u", xpinfo->dir);
+		break;
+	}
+	fprintf(fp, " ");
+
+	switch (xpinfo->action) {
+	case XFRM_POLICY_ALLOW:
+		if (show_stats > 0)
+			fprintf(fp, "action allow ");
+		break;
+	case XFRM_POLICY_BLOCK:
+		fprintf(fp, "action block ");
+		break;
+	default:
+		fprintf(fp, "action %u ", xpinfo->action);
+		break;
+	}
+
+	if (show_stats)
+		fprintf(fp, "index %u ", xpinfo->index);
+	fprintf(fp, "priority %u ", xpinfo->priority);
+	if (show_stats > 0) {
+		fprintf(fp, "share %s ", strxf_share(xpinfo->share));
+		fprintf(fp, "flag 0x%s", strxf_mask8(xpinfo->flags));
+	}
+	fprintf(fp, "%s", _SL_);
+
+	if (show_stats > 0)
+		xfrm_lifetime_print(&xpinfo->lft, &xpinfo->curlft, fp, "\t");
+
+	xfrm_xfrma_print(tb, xpinfo->sel.family, fp, "\t");
+
+	if (oneline)
+		fprintf(fp, "\n");
+
+	return 0;
+}
+
+static int xfrm_policy_get_or_delete(int argc, char **argv, int delete,
+				     void *res_nlbuf)
+{
+	struct rtnl_handle rth;
+	struct {
+		struct nlmsghdr			n;
+		struct xfrm_userpolicy_id	xpid;
+	} req;
+	char *dirp = NULL;
+	char *selp = NULL;
+	char *indexp = NULL;
+
+	memset(&req, 0, sizeof(req));
+
+	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xpid));
+	req.n.nlmsg_flags = NLM_F_REQUEST;
+	req.n.nlmsg_type = delete ? XFRM_MSG_DELPOLICY : XFRM_MSG_GETPOLICY;
+
+	while (argc > 0) {
+		if (strcmp(*argv, "dir") == 0) {
+			if (dirp)
+				duparg("dir", *argv);
+			dirp = *argv;
+
+			NEXT_ARG();
+			xfrm_policy_dir_parse(&req.xpid.dir, &argc, &argv);
+
+		} else if (strcmp(*argv, "index") == 0) {
+			if (indexp)
+				duparg("index", *argv);
+			indexp = *argv;
+
+			NEXT_ARG();
+			if (get_u32(&req.xpid.index, *argv, 0))
+				invarg("\"INDEX\" is invalid", *argv);
+
+		} else {
+			if (selp)
+				invarg("unknown", *argv);
+			selp = *argv;
+
+			xfrm_selector_parse(&req.xpid.sel, &argc, &argv);
+			if (preferred_family == AF_UNSPEC)
+				preferred_family = req.xpid.sel.family;
+
+		}
+
+		argc--; argv++;
+	}
+
+	if (!dirp) {
+		fprintf(stderr, "Not enough information: \"DIR\" is required.\n");
+		exit(1);
+	}
+	if (!selp && !indexp) {
+		fprintf(stderr, "Not enough information: either \"SELECTOR\" or \"INDEX\" is required.\n");
+		exit(1);
+	}
+	if (selp && indexp)
+		duparg2("SELECTOR", "INDEX");
+
+	if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
+		exit(1);
+
+	if (req.xpid.sel.family == AF_UNSPEC)
+		req.xpid.sel.family = AF_INET;
+
+	if (rtnl_talk(&rth, &req.n, 0, 0, res_nlbuf, NULL, NULL) < 0)
+		exit(2);
+
+	rtnl_close(&rth);
+
+	return 0;
+}
+
+static int xfrm_policy_delete(int argc, char **argv)
+{
+	return xfrm_policy_get_or_delete(argc, argv, 1, NULL);
+}
+
+static int xfrm_policy_get(int argc, char **argv)
+{
+	char buf[NLMSG_BUF_SIZE];
+	struct nlmsghdr *n = (struct nlmsghdr *)buf;
+
+	memset(buf, 0, sizeof(buf));
+
+	xfrm_policy_get_or_delete(argc, argv, 0, n);
+
+	if (xfrm_policy_print(NULL, n, (void*)stdout) < 0) {
+		fprintf(stderr, "An error :-)\n");
+		exit(1);
+	}
+
+	return 0;
+}
+
+/*
+ * With an existing policy of nlmsg, make new nlmsg for deleting the policy
+ * and store it to buffer.
+ */
+static int xfrm_policy_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_userpolicy_info *xpinfo = NLMSG_DATA(n);
+	int len = n->nlmsg_len;
+	struct nlmsghdr *new_n;
+	struct xfrm_userpolicy_id *xpid;
+
+	if (n->nlmsg_type != XFRM_MSG_NEWPOLICY) {
+		fprintf(stderr, "Not a policy: %08x %08x %08x\n",
+			n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
+		return 0;
+	}
+
+	len -= NLMSG_LENGTH(sizeof(*xpinfo));
+	if (len < 0) {
+		fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
+		return -1;
+	}
+
+	if (!xfrm_policy_filter_match(xpinfo))
+		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(*xpid));
+	new_n->nlmsg_flags = NLM_F_REQUEST;
+	new_n->nlmsg_type = XFRM_MSG_DELPOLICY;
+	new_n->nlmsg_seq = ++rth->seq;
+
+	xpid = NLMSG_DATA(new_n);
+	memcpy(&xpid->sel, &xpinfo->sel, sizeof(xpid->sel));
+	xpid->dir = xpinfo->dir;
+	xpid->index = xpinfo->index;
+
+	xb->offset += new_n->nlmsg_len;
+	xb->nlmsg_count ++;
+
+	return 0;
+}
+
+static int xfrm_policy_list_or_flush(int argc, char **argv, int flush)
+{
+	char *selp = NULL;
+	struct rtnl_handle rth;
+
+	if (argc > 0)
+		filter.use = 1;
+	filter.xpinfo.sel.family = preferred_family;
+
+	while (argc > 0) {
+		if (strcmp(*argv, "dir") == 0) {
+			NEXT_ARG();
+			xfrm_policy_dir_parse(&filter.xpinfo.dir, &argc, &argv);
+
+			filter.dir_mask = XFRM_FILTER_MASK_FULL;
+
+		} else if (strcmp(*argv, "index") == 0) {
+			NEXT_ARG();
+			if (get_u32(&filter.xpinfo.index, *argv, 0))
+				invarg("\"INDEX\" is invalid", *argv);
+
+			filter.index_mask = XFRM_FILTER_MASK_FULL;
+
+		} else if (strcmp(*argv, "action") == 0) {
+			NEXT_ARG();
+			if (strcmp(*argv, "allow") == 0)
+				filter.xpinfo.action = XFRM_POLICY_ALLOW;
+			else if (strcmp(*argv, "block") == 0)
+				filter.xpinfo.action = XFRM_POLICY_BLOCK;
+			else
+				invarg("\"ACTION\" is invalid\n", *argv);
+
+			filter.action_mask = XFRM_FILTER_MASK_FULL;
+
+		} else if (strcmp(*argv, "priority") == 0) {
+			NEXT_ARG();
+			if (get_u32(&filter.xpinfo.priority, *argv, 0))
+				invarg("\"PRIORITY\" is invalid", *argv);
+
+			filter.priority_mask = XFRM_FILTER_MASK_FULL;
+
+		} else {
+			if (selp)
+				invarg("unknown", *argv);
+			selp = *argv;
+
+			xfrm_selector_parse(&filter.xpinfo.sel, &argc, &argv);
+			if (preferred_family == AF_UNSPEC)
+				preferred_family = filter.xpinfo.sel.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_GETPOLICY) < 0) {
+				perror("Cannot send dump request");
+				exit(1);
+			}
+
+			if (rtnl_dump_filter(&rth, xfrm_policy_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_GETPOLICY) < 0) {
+			perror("Cannot send dump request");
+			exit(1);
+		}
+
+		if (rtnl_dump_filter(&rth, xfrm_policy_print, stdout, NULL, NULL) < 0) {
+			fprintf(stderr, "Dump terminated\n");
+			exit(1);
+		}
+	}
+
+	rtnl_close(&rth);
+
+	exit(0);
+}
+
+static int xfrm_policy_flush_all(void)
+{
+	struct rtnl_handle rth;
+	struct {
+		struct nlmsghdr	n;
+	} req;
+
+	memset(&req, 0, sizeof(req));
+
+	req.n.nlmsg_len = NLMSG_LENGTH(0); /* nlmsg data is nothing */
+	req.n.nlmsg_flags = NLM_F_REQUEST;
+	req.n.nlmsg_type = XFRM_MSG_FLUSHPOLICY;
+
+	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_policy(int argc, char **argv)
+{
+	if (argc < 1)
+		return xfrm_policy_list_or_flush(0, NULL, 0);
+
+	if (matches(*argv, "add") == 0)
+		return xfrm_policy_modify(XFRM_MSG_NEWPOLICY, 0,
+					  argc-1, argv+1);
+	if (matches(*argv, "update") == 0)
+		return xfrm_policy_modify(XFRM_MSG_UPDPOLICY, 0,
+					  argc-1, argv+1);
+	if (matches(*argv, "delete") == 0 || matches(*argv, "del") == 0)
+		return xfrm_policy_delete(argc-1, argv+1);
+	if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
+	    || matches(*argv, "lst") == 0)
+		return xfrm_policy_list_or_flush(argc-1, argv+1, 0);
+	if (matches(*argv, "get") == 0)
+		return xfrm_policy_get(argc-1, argv+1);
+	if (matches(*argv, "flush") == 0) {
+		if (argc-1 < 1)
+			return xfrm_policy_flush_all();
+		else
+			return xfrm_policy_list_or_flush(argc-1, argv+1, 1);
+	}
+	if (matches(*argv, "help") == 0)
+		usage();
+	fprintf(stderr, "Command \"%s\" is unknown, try \"ip xfrm policy help\".\n", *argv);
+	exit(-1);
+}