Adding upstream version 6.8.0.upstream/6.8.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1074 insertions, 0 deletions

diff --git a/ip/iprule.c b/ip/iprule.c
new file mode 100644
index 0000000..e503e5c
--- /dev/null
+++ b/ip/iprule.c
@@ -0,0 +1,1074 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * iprule.c		"ip rule".
+ *
+ * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include <linux/if.h>
+#include <linux/fib_rules.h>
+#include <errno.h>
+
+#include "rt_names.h"
+#include "utils.h"
+#include "ip_common.h"
+#include "json_print.h"
+
+enum list_action {
+	IPRULE_LIST,
+	IPRULE_FLUSH,
+	IPRULE_SAVE,
+};
+
+extern struct rtnl_handle rth;
+
+static void usage(void) __attribute__((noreturn));
+
+static void usage(void)
+{
+	fprintf(stderr,
+		"Usage: ip rule { add | del } SELECTOR ACTION\n"
+		"       ip rule { flush | save | restore }\n"
+		"       ip rule [ list [ SELECTOR ]]\n"
+		"SELECTOR := [ not ] [ from PREFIX ] [ to PREFIX ] [ tos TOS ]\n"
+		"            [ fwmark FWMARK[/MASK] ]\n"
+		"            [ iif STRING ] [ oif STRING ] [ pref NUMBER ] [ l3mdev ]\n"
+		"            [ uidrange NUMBER-NUMBER ]\n"
+		"            [ ipproto PROTOCOL ]\n"
+		"            [ sport [ NUMBER | NUMBER-NUMBER ]\n"
+		"            [ dport [ NUMBER | NUMBER-NUMBER ] ]\n"
+		"ACTION := [ table TABLE_ID ]\n"
+		"          [ protocol PROTO ]\n"
+		"          [ nat ADDRESS ]\n"
+		"          [ realms [SRCREALM/]DSTREALM ]\n"
+		"          [ goto NUMBER ]\n"
+		"          SUPPRESSOR\n"
+		"SUPPRESSOR := [ suppress_prefixlength NUMBER ]\n"
+		"              [ suppress_ifgroup DEVGROUP ]\n"
+		"TABLE_ID := [ local | main | default | NUMBER ]\n");
+	exit(-1);
+}
+
+static struct
+{
+	int not;
+	int l3mdev;
+	int iifmask, oifmask, uidrange;
+	unsigned int tb;
+	unsigned int tos, tosmask;
+	unsigned int pref, prefmask;
+	unsigned int fwmark, fwmask;
+	uint64_t tun_id;
+	char iif[IFNAMSIZ];
+	char oif[IFNAMSIZ];
+	struct fib_rule_uid_range range;
+	inet_prefix src;
+	inet_prefix dst;
+	int protocol;
+	int protocolmask;
+	struct fib_rule_port_range sport;
+	struct fib_rule_port_range dport;
+	__u8 ipproto;
+} filter;
+
+static inline int frh_get_table(struct fib_rule_hdr *frh, struct rtattr **tb)
+{
+	__u32 table = frh->table;
+	if (tb[RTA_TABLE])
+		table = rta_getattr_u32(tb[RTA_TABLE]);
+	return table;
+}
+
+static bool filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
+{
+	struct fib_rule_hdr *frh = NLMSG_DATA(n);
+	__u32 table;
+
+	if (preferred_family != AF_UNSPEC && frh->family != preferred_family)
+		return false;
+
+	if (filter.prefmask &&
+	    filter.pref ^ (tb[FRA_PRIORITY] ? rta_getattr_u32(tb[FRA_PRIORITY]) : 0))
+		return false;
+	if (filter.not && !(frh->flags & FIB_RULE_INVERT))
+		return false;
+
+	if (filter.src.family) {
+		inet_prefix *f_src = &filter.src;
+
+		if (f_src->family != frh->family ||
+		    f_src->bitlen > frh->src_len)
+			return false;
+
+		if (inet_addr_match_rta(f_src, tb[FRA_SRC]))
+			return false;
+	}
+
+	if (filter.dst.family) {
+		inet_prefix *f_dst = &filter.dst;
+
+		if (f_dst->family != frh->family ||
+		    f_dst->bitlen > frh->dst_len)
+			return false;
+
+		if (inet_addr_match_rta(f_dst, tb[FRA_DST]))
+			return false;
+	}
+
+	if (filter.tosmask && filter.tos ^ frh->tos)
+		return false;
+
+	if (filter.fwmark) {
+		__u32 mark = 0;
+
+		if (tb[FRA_FWMARK])
+			mark = rta_getattr_u32(tb[FRA_FWMARK]);
+		if (filter.fwmark ^ mark)
+			return false;
+	}
+	if (filter.fwmask) {
+		__u32 mask = 0;
+
+		if (tb[FRA_FWMASK])
+			mask = rta_getattr_u32(tb[FRA_FWMASK]);
+		if (filter.fwmask ^ mask)
+			return false;
+	}
+
+	if (filter.iifmask) {
+		if (tb[FRA_IFNAME]) {
+			if (strcmp(filter.iif, rta_getattr_str(tb[FRA_IFNAME])) != 0)
+				return false;
+		} else {
+			return false;
+		}
+	}
+
+	if (filter.oifmask) {
+		if (tb[FRA_OIFNAME]) {
+			if (strcmp(filter.oif, rta_getattr_str(tb[FRA_OIFNAME])) != 0)
+				return false;
+		} else {
+			return false;
+		}
+	}
+
+	if (filter.l3mdev && !(tb[FRA_L3MDEV] && rta_getattr_u8(tb[FRA_L3MDEV])))
+		return false;
+
+	if (filter.uidrange) {
+		struct fib_rule_uid_range *r = RTA_DATA(tb[FRA_UID_RANGE]);
+
+		if (!tb[FRA_UID_RANGE] ||
+		    r->start != filter.range.start ||
+		    r->end != filter.range.end)
+			return false;
+	}
+
+	if (filter.ipproto) {
+		__u8 ipproto = 0;
+
+		if (tb[FRA_IP_PROTO])
+			ipproto = rta_getattr_u8(tb[FRA_IP_PROTO]);
+		if (filter.ipproto != ipproto)
+			return false;
+	}
+
+	if (filter.sport.start) {
+		const struct fib_rule_port_range *r;
+
+		if (!tb[FRA_SPORT_RANGE])
+			return false;
+
+		r = RTA_DATA(tb[FRA_SPORT_RANGE]);
+		if (r->start != filter.sport.start ||
+		    r->end != filter.sport.end)
+			return false;
+	}
+
+	if (filter.dport.start) {
+		const struct fib_rule_port_range *r;
+
+		if (!tb[FRA_DPORT_RANGE])
+			return false;
+
+		r = RTA_DATA(tb[FRA_DPORT_RANGE]);
+		if (r->start != filter.dport.start ||
+		    r->end != filter.dport.end)
+			return false;
+	}
+
+	if (filter.tun_id) {
+		__u64 tun_id = 0;
+
+		if (tb[FRA_TUN_ID]) {
+			tun_id = ntohll(rta_getattr_u64(tb[FRA_TUN_ID]));
+			if (filter.tun_id != tun_id)
+				return false;
+		} else {
+			return false;
+		}
+	}
+
+	table = frh_get_table(frh, tb);
+	if (filter.tb > 0 && filter.tb ^ table)
+		return false;
+
+	return true;
+}
+
+int print_rule(struct nlmsghdr *n, void *arg)
+{
+	FILE *fp = arg;
+	struct fib_rule_hdr *frh = NLMSG_DATA(n);
+	int len = n->nlmsg_len;
+	int host_len = -1;
+	__u32 table, prio = 0;
+	struct rtattr *tb[FRA_MAX+1];
+	SPRINT_BUF(b1);
+
+	if (n->nlmsg_type != RTM_NEWRULE && n->nlmsg_type != RTM_DELRULE)
+		return 0;
+
+	len -= NLMSG_LENGTH(sizeof(*frh));
+	if (len < 0)
+		return -1;
+
+	parse_rtattr(tb, FRA_MAX, RTM_RTA(frh), len);
+
+	host_len = af_bit_len(frh->family);
+
+	if (!filter_nlmsg(n, tb, host_len))
+		return 0;
+
+	open_json_object(NULL);
+	if (n->nlmsg_type == RTM_DELRULE)
+		print_bool(PRINT_ANY, "deleted", "Deleted ", true);
+
+	if (tb[FRA_PRIORITY])
+		prio = rta_getattr_u32(tb[FRA_PRIORITY]);
+
+	print_uint(PRINT_ANY, "priority", "%u:\t", prio);
+
+	if (frh->flags & FIB_RULE_INVERT)
+		print_null(PRINT_ANY, "not", "not ", NULL);
+
+	if (tb[FRA_SRC]) {
+		const char *src = rt_addr_n2a_rta(frh->family, tb[FRA_SRC]);
+
+		print_string(PRINT_FP, NULL, "from ", NULL);
+		print_color_string(PRINT_ANY, ifa_family_color(frh->family),
+				   "src", "%s", src);
+		if (frh->src_len != host_len)
+			print_uint(PRINT_ANY, "srclen", "/%u", frh->src_len);
+	} else if (frh->src_len) {
+		print_string(PRINT_ANY, "src", "from %s", "0");
+		print_uint(PRINT_ANY, "srclen", "/%u", frh->src_len);
+	} else {
+		print_string(PRINT_ANY, "src", "from %s", "all");
+	}
+
+	if (tb[FRA_DST]) {
+		const char *dst = rt_addr_n2a_rta(frh->family, tb[FRA_DST]);
+
+		print_string(PRINT_FP, NULL, " to ", NULL);
+		print_color_string(PRINT_ANY, ifa_family_color(frh->family),
+				   "dst", "%s", dst);
+		if (frh->dst_len != host_len)
+			print_uint(PRINT_ANY, "dstlen", "/%u", frh->dst_len);
+	} else if (frh->dst_len) {
+		print_string(PRINT_ANY, "dst", " to %s", "0");
+		print_uint(PRINT_ANY, "dstlen", "/%u", frh->dst_len);
+	}
+
+	if (frh->tos) {
+		print_string(PRINT_ANY, "tos",
+			     " tos %s",
+			     rtnl_dsfield_n2a(frh->tos, b1, sizeof(b1)));
+	}
+
+	if (tb[FRA_FWMARK] || tb[FRA_FWMASK]) {
+		__u32 mark = 0, mask = 0;
+
+		if (tb[FRA_FWMARK])
+			mark = rta_getattr_u32(tb[FRA_FWMARK]);
+
+		if (tb[FRA_FWMASK] &&
+		    (mask = rta_getattr_u32(tb[FRA_FWMASK])) != 0xFFFFFFFF) {
+			print_0xhex(PRINT_ANY, "fwmark", " fwmark %#llx", mark);
+			print_0xhex(PRINT_ANY, "fwmask", "/%#llx", mask);
+		} else {
+			print_0xhex(PRINT_ANY, "fwmark", " fwmark %#llx", mark);
+		}
+	}
+
+	if (tb[FRA_IFNAME]) {
+		if (!is_json_context())
+			fprintf(fp, " iif ");
+		print_color_string(PRINT_ANY, COLOR_IFNAME,
+				   "iif", "%s",
+				   rta_getattr_str(tb[FRA_IFNAME]));
+
+		if (frh->flags & FIB_RULE_IIF_DETACHED)
+			print_null(PRINT_ANY, "iif_detached", " [detached]",
+				   NULL);
+	}
+
+	if (tb[FRA_OIFNAME]) {
+		if (!is_json_context())
+			fprintf(fp, " oif ");
+
+		print_color_string(PRINT_ANY, COLOR_IFNAME, "oif", "%s",
+				   rta_getattr_str(tb[FRA_OIFNAME]));
+
+		if (frh->flags & FIB_RULE_OIF_DETACHED)
+			print_null(PRINT_ANY, "oif_detached", " [detached]",
+				   NULL);
+	}
+
+	if (tb[FRA_L3MDEV]) {
+		__u8 mdev = rta_getattr_u8(tb[FRA_L3MDEV]);
+
+		if (mdev)
+			print_null(PRINT_ANY, "l3mdev",
+				   " lookup [l3mdev-table]", NULL);
+	}
+
+	if (tb[FRA_UID_RANGE]) {
+		struct fib_rule_uid_range *r = RTA_DATA(tb[FRA_UID_RANGE]);
+
+		print_uint(PRINT_ANY, "uid_start", " uidrange %u", r->start);
+		print_uint(PRINT_ANY, "uid_end", "-%u", r->end);
+	}
+
+	if (tb[FRA_IP_PROTO]) {
+		SPRINT_BUF(pbuf);
+		print_string(PRINT_ANY, "ipproto", " ipproto %s",
+			     inet_proto_n2a(rta_getattr_u8(tb[FRA_IP_PROTO]),
+					    pbuf, sizeof(pbuf)));
+	}
+
+	if (tb[FRA_SPORT_RANGE]) {
+		struct fib_rule_port_range *r = RTA_DATA(tb[FRA_SPORT_RANGE]);
+
+		if (r->start == r->end) {
+			print_uint(PRINT_ANY, "sport", " sport %u", r->start);
+		} else {
+			print_uint(PRINT_ANY, "sport_start", " sport %u",
+				   r->start);
+			print_uint(PRINT_ANY, "sport_end", "-%u", r->end);
+		}
+	}
+
+	if (tb[FRA_DPORT_RANGE]) {
+		struct fib_rule_port_range *r = RTA_DATA(tb[FRA_DPORT_RANGE]);
+
+		if (r->start == r->end) {
+			print_uint(PRINT_ANY, "dport", " dport %u", r->start);
+		} else {
+			print_uint(PRINT_ANY, "dport_start", " dport %u",
+				   r->start);
+			print_uint(PRINT_ANY, "dport_end", "-%u", r->end);
+		}
+	}
+
+	if (tb[FRA_TUN_ID]) {
+		__u64 tun_id = ntohll(rta_getattr_u64(tb[FRA_TUN_ID]));
+
+		print_u64(PRINT_ANY, "tun_id", " tun_id %llu", tun_id);
+	}
+
+	table = frh_get_table(frh, tb);
+	if (table) {
+		print_string(PRINT_ANY, "table",
+			     " lookup %s",
+			     rtnl_rttable_n2a(table, b1, sizeof(b1)));
+
+		if (tb[FRA_SUPPRESS_PREFIXLEN]) {
+			int pl = rta_getattr_u32(tb[FRA_SUPPRESS_PREFIXLEN]);
+
+			if (pl != -1)
+				print_int(PRINT_ANY, "suppress_prefixlen",
+					  " suppress_prefixlength %d", pl);
+		}
+
+		if (tb[FRA_SUPPRESS_IFGROUP]) {
+			int group = rta_getattr_u32(tb[FRA_SUPPRESS_IFGROUP]);
+
+			if (group != -1) {
+				const char *grname
+					= rtnl_group_n2a(group, b1, sizeof(b1));
+
+				print_string(PRINT_ANY, "suppress_ifgroup",
+					     " suppress_ifgroup %s", grname);
+			}
+		}
+	}
+
+	if (tb[FRA_FLOW]) {
+		__u32 to = rta_getattr_u32(tb[FRA_FLOW]);
+		__u32 from = to>>16;
+
+		to &= 0xFFFF;
+		if (from)
+			print_string(PRINT_ANY,
+				     "flow_from", " realms %s/",
+				     rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
+		else
+			print_string(PRINT_FP, NULL, " realms ", NULL);
+
+		print_string(PRINT_ANY, "flow_to", "%s",
+			     rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
+	}
+
+	if (frh->action == RTN_NAT) {
+		if (tb[RTA_GATEWAY]) {
+			const char *gateway;
+
+			gateway = format_host_rta(frh->family, tb[RTA_GATEWAY]);
+
+			print_string(PRINT_ANY, "nat_gateway",
+				     " map-to %s", gateway);
+		} else {
+			print_null(PRINT_ANY, "masquerade", " masquerade", NULL);
+		}
+	} else if (frh->action == FR_ACT_GOTO) {
+		if (tb[FRA_GOTO])
+			print_uint(PRINT_ANY, "goto", " goto %u",
+				   rta_getattr_u32(tb[FRA_GOTO]));
+		else
+			print_string(PRINT_ANY, "goto", " goto %s", "none");
+
+		if (frh->flags & FIB_RULE_UNRESOLVED)
+			print_null(PRINT_ANY, "unresolved",
+				   " [unresolved]", NULL);
+	} else if (frh->action == FR_ACT_NOP) {
+		print_null(PRINT_ANY, "nop", " nop", NULL);
+	} else if (frh->action != FR_ACT_TO_TBL) {
+		print_string(PRINT_ANY, "action", " %s",
+			     rtnl_rtntype_n2a(frh->action, b1, sizeof(b1)));
+	}
+
+	if (tb[FRA_PROTOCOL]) {
+		__u8 protocol = rta_getattr_u8(tb[FRA_PROTOCOL]);
+
+		if ((protocol && protocol != RTPROT_KERNEL) || show_details > 0) {
+			print_string(PRINT_ANY, "protocol", " proto %s",
+				     rtnl_rtprot_n2a(protocol, b1, sizeof(b1)));
+		}
+	}
+	print_string(PRINT_FP, NULL, "\n", "");
+	close_json_object();
+	fflush(fp);
+	return 0;
+}
+
+static __u32 rule_dump_magic = 0x71706986;
+
+static int save_rule_prep(void)
+{
+	int ret;
+
+	if (isatty(STDOUT_FILENO)) {
+		fprintf(stderr, "Not sending a binary stream to stdout\n");
+		return -1;
+	}
+
+	ret = write(STDOUT_FILENO, &rule_dump_magic, sizeof(rule_dump_magic));
+	if (ret != sizeof(rule_dump_magic)) {
+		fprintf(stderr, "Can't write magic to dump file\n");
+		return -1;
+	}
+
+	return 0;
+}
+
+static int save_rule(struct nlmsghdr *n, void *arg)
+{
+	int ret;
+
+	ret = write(STDOUT_FILENO, n, n->nlmsg_len);
+	if ((ret > 0) && (ret != n->nlmsg_len)) {
+		fprintf(stderr, "Short write while saving nlmsg\n");
+		ret = -EIO;
+	}
+
+	return ret == n->nlmsg_len ? 0 : ret;
+}
+
+static int flush_rule(struct nlmsghdr *n, void *arg)
+{
+	struct rtnl_handle rth2;
+	struct fib_rule_hdr *frh = NLMSG_DATA(n);
+	int len = n->nlmsg_len;
+	struct rtattr *tb[FRA_MAX+1];
+	int host_len = -1;
+
+	len -= NLMSG_LENGTH(sizeof(*frh));
+	if (len < 0)
+		return -1;
+
+	parse_rtattr(tb, FRA_MAX, RTM_RTA(frh), len);
+
+	host_len = af_bit_len(frh->family);
+	if (!filter_nlmsg(n, tb, host_len))
+		return 0;
+
+	if (tb[FRA_PROTOCOL]) {
+		__u8 protocol = rta_getattr_u8(tb[FRA_PROTOCOL]);
+
+		if ((filter.protocol ^ protocol) & filter.protocolmask)
+			return 0;
+	}
+
+	if (tb[FRA_PRIORITY]) {
+		n->nlmsg_type = RTM_DELRULE;
+		n->nlmsg_flags = NLM_F_REQUEST;
+
+		if (rtnl_open(&rth2, 0) < 0)
+			return -1;
+
+		if (rtnl_talk(&rth2, n, NULL) < 0)
+			return -2;
+
+		rtnl_close(&rth2);
+	}
+
+	return 0;
+}
+
+static int iprule_list_flush_or_save(int argc, char **argv, int action)
+{
+	rtnl_filter_t filter_fn;
+	int af = preferred_family;
+
+	if (af == AF_UNSPEC)
+		af = AF_INET;
+
+	if (action == IPRULE_SAVE && argc > 0) {
+		fprintf(stderr, "\"ip rule save\" does not take any arguments.\n");
+		return -1;
+	}
+
+	switch (action) {
+	case IPRULE_SAVE:
+		if (save_rule_prep())
+			return -1;
+		filter_fn = save_rule;
+		break;
+	case IPRULE_FLUSH:
+		filter_fn = flush_rule;
+		break;
+	default:
+		filter_fn = print_rule;
+	}
+
+	memset(&filter, 0, sizeof(filter));
+
+	while (argc > 0) {
+		if (matches(*argv, "preference") == 0 ||
+		    matches(*argv, "order") == 0 ||
+		    matches(*argv, "priority") == 0) {
+			__u32 pref;
+
+			NEXT_ARG();
+			if (get_u32(&pref, *argv, 0))
+				invarg("preference value is invalid\n", *argv);
+			filter.pref = pref;
+			filter.prefmask = 1;
+		} else if (strcmp(*argv, "not") == 0) {
+			filter.not = 1;
+		} else if (strcmp(*argv, "tos") == 0 ||
+			   strcmp(*argv, "dsfield") == 0) {
+			__u32 tos;
+
+			NEXT_ARG();
+			if (rtnl_dsfield_a2n(&tos, *argv))
+				invarg("TOS value is invalid\n", *argv);
+			filter.tos = tos;
+			filter.tosmask = 1;
+		} else if (strcmp(*argv, "fwmark") == 0) {
+			char *slash;
+			__u32 fwmark, fwmask;
+
+			NEXT_ARG();
+			slash = strchr(*argv, '/');
+			if (slash != NULL)
+				*slash = '\0';
+			if (get_u32(&fwmark, *argv, 0))
+				invarg("fwmark value is invalid\n", *argv);
+			filter.fwmark = fwmark;
+			if (slash) {
+				if (get_u32(&fwmask, slash+1, 0))
+					invarg("fwmask value is invalid\n",
+					       slash+1);
+				filter.fwmask = fwmask;
+			}
+		} else if (strcmp(*argv, "dev") == 0 ||
+			   strcmp(*argv, "iif") == 0) {
+			NEXT_ARG();
+			if (get_ifname(filter.iif, *argv))
+				invarg("\"iif\"/\"dev\" not a valid ifname", *argv);
+			filter.iifmask = 1;
+		} else if (strcmp(*argv, "oif") == 0) {
+			NEXT_ARG();
+			if (get_ifname(filter.oif, *argv))
+				invarg("\"oif\" not a valid ifname", *argv);
+			filter.oifmask = 1;
+		} else if (strcmp(*argv, "l3mdev") == 0) {
+			filter.l3mdev = 1;
+		} else if (strcmp(*argv, "uidrange") == 0) {
+			NEXT_ARG();
+			filter.uidrange = 1;
+			if (sscanf(*argv, "%u-%u",
+				   &filter.range.start,
+				   &filter.range.end) != 2)
+				invarg("invalid UID range\n", *argv);
+
+		} else if (matches(*argv, "tun_id") == 0) {
+			__u64 tun_id;
+
+			NEXT_ARG();
+			if (get_u64(&tun_id, *argv, 0))
+				invarg("\"tun_id\" value is invalid\n", *argv);
+			filter.tun_id = tun_id;
+		} else if (matches(*argv, "lookup") == 0 ||
+			   matches(*argv, "table") == 0) {
+			__u32 tid;
+
+			NEXT_ARG();
+			if (rtnl_rttable_a2n(&tid, *argv))
+				invarg("table id value is invalid\n", *argv);
+			filter.tb = tid;
+		} else if (matches(*argv, "from") == 0 ||
+			   matches(*argv, "src") == 0) {
+			NEXT_ARG();
+			if (get_prefix(&filter.src, *argv, af))
+				invarg("from value is invalid\n", *argv);
+		} else if (matches(*argv, "protocol") == 0) {
+			__u32 prot;
+			NEXT_ARG();
+			filter.protocolmask = -1;
+			if (rtnl_rtprot_a2n(&prot, *argv)) {
+				if (strcmp(*argv, "all") != 0)
+					invarg("invalid \"protocol\"\n", *argv);
+				prot = 0;
+				filter.protocolmask = 0;
+			}
+			filter.protocol = prot;
+		} else if (strcmp(*argv, "ipproto") == 0) {
+			int ipproto;
+
+			NEXT_ARG();
+			ipproto = inet_proto_a2n(*argv);
+			if (ipproto < 0)
+				invarg("Invalid \"ipproto\" value\n", *argv);
+			filter.ipproto = ipproto;
+		} else if (strcmp(*argv, "sport") == 0) {
+			struct fib_rule_port_range r;
+			int ret;
+
+			NEXT_ARG();
+			ret = sscanf(*argv, "%hu-%hu", &r.start, &r.end);
+			if (ret == 1)
+				r.end = r.start;
+			else if (ret != 2)
+				invarg("invalid port range\n", *argv);
+			filter.sport = r;
+		} else if (strcmp(*argv, "dport") == 0) {
+			struct fib_rule_port_range r;
+			int ret;
+
+			NEXT_ARG();
+			ret = sscanf(*argv, "%hu-%hu", &r.start, &r.end);
+			if (ret == 1)
+				r.end = r.start;
+			else if (ret != 2)
+				invarg("invalid dport range\n", *argv);
+			filter.dport = r;
+		} else {
+			if (matches(*argv, "dst") == 0 ||
+			    matches(*argv, "to") == 0) {
+				NEXT_ARG();
+			}
+			if (get_prefix(&filter.dst, *argv, af))
+				invarg("to value is invalid\n", *argv);
+		}
+		argc--; argv++;
+	}
+
+	if (rtnl_ruledump_req(&rth, af) < 0) {
+		perror("Cannot send dump request");
+		return 1;
+	}
+
+	new_json_obj(json);
+	if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
+		fprintf(stderr, "Dump terminated\n");
+		delete_json_obj();
+		return 1;
+	}
+	delete_json_obj();
+
+	return 0;
+}
+
+static int rule_dump_check_magic(void)
+{
+	int ret;
+	__u32 magic = 0;
+
+	if (isatty(STDIN_FILENO)) {
+		fprintf(stderr, "Can't restore rule dump from a terminal\n");
+		return -1;
+	}
+
+	ret = fread(&magic, sizeof(magic), 1, stdin);
+	if (magic != rule_dump_magic) {
+		fprintf(stderr, "Magic mismatch (%d elems, %x magic)\n",
+			ret, magic);
+		return -1;
+	}
+
+	return 0;
+}
+
+static int restore_handler(struct rtnl_ctrl_data *ctrl,
+			   struct nlmsghdr *n, void *arg)
+{
+	int ret;
+
+	n->nlmsg_flags |= NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK;
+
+	ll_init_map(&rth);
+
+	ret = rtnl_talk(&rth, n, NULL);
+	if ((ret < 0) && (errno == EEXIST))
+		ret = 0;
+
+	return ret;
+}
+
+
+static int iprule_restore(void)
+{
+	if (rule_dump_check_magic())
+		exit(-1);
+
+	exit(rtnl_from_file(stdin, &restore_handler, NULL));
+}
+
+static int iprule_modify(int cmd, int argc, char **argv)
+{
+	int l3mdev_rule = 0;
+	int table_ok = 0;
+	__u32 tid = 0;
+	struct {
+		struct nlmsghdr	n;
+		struct fib_rule_hdr	frh;
+		char			buf[1024];
+	} req = {
+		.n.nlmsg_type = cmd,
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.frh.family = preferred_family,
+		.frh.action = FR_ACT_UNSPEC,
+	};
+	int ret;
+
+	if (cmd == RTM_NEWRULE) {
+		if (argc == 0) {
+			fprintf(stderr,
+				"\"ip rule add\" requires arguments.\n");
+			return -1;
+		}
+		req.n.nlmsg_flags |= NLM_F_CREATE|NLM_F_EXCL;
+		req.frh.action = FR_ACT_TO_TBL;
+	}
+
+	if (cmd == RTM_DELRULE && argc == 0) {
+		fprintf(stderr, "\"ip rule del\" requires arguments.\n");
+		return -1;
+	}
+
+	while (argc > 0) {
+		if (strcmp(*argv, "not") == 0) {
+			req.frh.flags |= FIB_RULE_INVERT;
+		} else if (strcmp(*argv, "from") == 0) {
+			inet_prefix dst;
+
+			NEXT_ARG();
+			get_prefix(&dst, *argv, req.frh.family);
+			req.frh.src_len = dst.bitlen;
+			addattr_l(&req.n, sizeof(req), FRA_SRC,
+				  &dst.data, dst.bytelen);
+		} else if (strcmp(*argv, "to") == 0) {
+			inet_prefix dst;
+
+			NEXT_ARG();
+			get_prefix(&dst, *argv, req.frh.family);
+			req.frh.dst_len = dst.bitlen;
+			addattr_l(&req.n, sizeof(req), FRA_DST,
+				  &dst.data, dst.bytelen);
+		} else if (matches(*argv, "preference") == 0 ||
+			   matches(*argv, "order") == 0 ||
+			   matches(*argv, "priority") == 0) {
+			__u32 pref;
+
+			NEXT_ARG();
+			if (get_u32(&pref, *argv, 0))
+				invarg("preference value is invalid\n", *argv);
+			addattr32(&req.n, sizeof(req), FRA_PRIORITY, pref);
+		} else if (strcmp(*argv, "tos") == 0 ||
+			   matches(*argv, "dsfield") == 0) {
+			__u32 tos;
+
+			NEXT_ARG();
+			if (rtnl_dsfield_a2n(&tos, *argv))
+				invarg("TOS value is invalid\n", *argv);
+			req.frh.tos = tos;
+		} else if (strcmp(*argv, "fwmark") == 0) {
+			char *slash;
+			__u32 fwmark, fwmask;
+
+			NEXT_ARG();
+
+			slash = strchr(*argv, '/');
+			if (slash != NULL)
+				*slash = '\0';
+			if (get_u32(&fwmark, *argv, 0))
+				invarg("fwmark value is invalid\n", *argv);
+			addattr32(&req.n, sizeof(req), FRA_FWMARK, fwmark);
+			if (slash) {
+				if (get_u32(&fwmask, slash+1, 0))
+					invarg("fwmask value is invalid\n",
+					       slash+1);
+				addattr32(&req.n, sizeof(req),
+					  FRA_FWMASK, fwmask);
+			}
+		} else if (matches(*argv, "realms") == 0) {
+			__u32 realm;
+
+			NEXT_ARG();
+			if (get_rt_realms_or_raw(&realm, *argv))
+				invarg("invalid realms\n", *argv);
+			addattr32(&req.n, sizeof(req), FRA_FLOW, realm);
+		} else if (matches(*argv, "protocol") == 0) {
+			__u32 proto;
+
+			NEXT_ARG();
+			if (rtnl_rtprot_a2n(&proto, *argv))
+				invarg("\"protocol\" value is invalid\n", *argv);
+			addattr8(&req.n, sizeof(req), FRA_PROTOCOL, proto);
+		} else if (matches(*argv, "tun_id") == 0) {
+			__u64 tun_id;
+
+			NEXT_ARG();
+			if (get_be64(&tun_id, *argv, 0))
+				invarg("\"tun_id\" value is invalid\n", *argv);
+			addattr64(&req.n, sizeof(req), FRA_TUN_ID, tun_id);
+		} else if (matches(*argv, "table") == 0 ||
+			   strcmp(*argv, "lookup") == 0) {
+			NEXT_ARG();
+			if (rtnl_rttable_a2n(&tid, *argv))
+				invarg("invalid table ID\n", *argv);
+			if (tid < 256)
+				req.frh.table = tid;
+			else {
+				req.frh.table = RT_TABLE_UNSPEC;
+				addattr32(&req.n, sizeof(req), FRA_TABLE, tid);
+			}
+			table_ok = 1;
+		} else if (matches(*argv, "suppress_prefixlength") == 0 ||
+			   strcmp(*argv, "sup_pl") == 0) {
+			int pl;
+
+			NEXT_ARG();
+			if (get_s32(&pl, *argv, 0) || pl < 0)
+				invarg("suppress_prefixlength value is invalid\n",
+				       *argv);
+			addattr32(&req.n, sizeof(req),
+				  FRA_SUPPRESS_PREFIXLEN, pl);
+		} else if (matches(*argv, "suppress_ifgroup") == 0 ||
+			   strcmp(*argv, "sup_group") == 0) {
+			NEXT_ARG();
+			int group;
+
+			if (rtnl_group_a2n(&group, *argv))
+				invarg("Invalid \"suppress_ifgroup\" value\n",
+				       *argv);
+			addattr32(&req.n, sizeof(req),
+				  FRA_SUPPRESS_IFGROUP, group);
+		} else if (strcmp(*argv, "dev") == 0 ||
+			   strcmp(*argv, "iif") == 0) {
+			NEXT_ARG();
+			if (check_ifname(*argv))
+				invarg("\"iif\"/\"dev\" not a valid ifname", *argv);
+			addattr_l(&req.n, sizeof(req), FRA_IFNAME,
+				  *argv, strlen(*argv)+1);
+		} else if (strcmp(*argv, "oif") == 0) {
+			NEXT_ARG();
+			if (check_ifname(*argv))
+				invarg("\"oif\" not a valid ifname", *argv);
+			addattr_l(&req.n, sizeof(req), FRA_OIFNAME,
+				  *argv, strlen(*argv)+1);
+		} else if (strcmp(*argv, "l3mdev") == 0) {
+			addattr8(&req.n, sizeof(req), FRA_L3MDEV, 1);
+			table_ok = 1;
+			l3mdev_rule = 1;
+		} else if (strcmp(*argv, "uidrange") == 0) {
+			struct fib_rule_uid_range r;
+
+			NEXT_ARG();
+			if (sscanf(*argv, "%u-%u", &r.start, &r.end) != 2)
+				invarg("invalid UID range\n", *argv);
+			addattr_l(&req.n, sizeof(req), FRA_UID_RANGE, &r,
+				  sizeof(r));
+		} else if (strcmp(*argv, "nat") == 0 ||
+			   matches(*argv, "map-to") == 0) {
+			NEXT_ARG();
+			fprintf(stderr, "Warning: route NAT is deprecated\n");
+			addattr32(&req.n, sizeof(req), RTA_GATEWAY,
+				  get_addr32(*argv));
+			req.frh.action = RTN_NAT;
+		} else if (strcmp(*argv, "ipproto") == 0) {
+			int ipproto;
+
+			NEXT_ARG();
+			ipproto = inet_proto_a2n(*argv);
+			if (ipproto < 0)
+				invarg("Invalid \"ipproto\" value\n",
+				       *argv);
+			addattr8(&req.n, sizeof(req), FRA_IP_PROTO, ipproto);
+		} else if (strcmp(*argv, "sport") == 0) {
+			struct fib_rule_port_range r;
+			int ret = 0;
+
+			NEXT_ARG();
+			ret = sscanf(*argv, "%hu-%hu", &r.start, &r.end);
+			if (ret == 1)
+				r.end = r.start;
+			else if (ret != 2)
+				invarg("invalid port range\n", *argv);
+			addattr_l(&req.n, sizeof(req), FRA_SPORT_RANGE, &r,
+				  sizeof(r));
+		} else if (strcmp(*argv, "dport") == 0) {
+			struct fib_rule_port_range r;
+			int ret = 0;
+
+			NEXT_ARG();
+			ret = sscanf(*argv, "%hu-%hu", &r.start, &r.end);
+			if (ret == 1)
+				r.end = r.start;
+			else if (ret != 2)
+				invarg("invalid dport range\n", *argv);
+			addattr_l(&req.n, sizeof(req), FRA_DPORT_RANGE, &r,
+				  sizeof(r));
+		} else {
+			int type;
+
+			if (strcmp(*argv, "type") == 0)
+				NEXT_ARG();
+
+			if (matches(*argv, "help") == 0)
+				usage();
+			else if (matches(*argv, "goto") == 0) {
+				__u32 target;
+
+				type = FR_ACT_GOTO;
+				NEXT_ARG();
+				if (get_u32(&target, *argv, 0))
+					invarg("invalid target\n", *argv);
+				addattr32(&req.n, sizeof(req),
+					  FRA_GOTO, target);
+			} else if (matches(*argv, "nop") == 0)
+				type = FR_ACT_NOP;
+			else if (rtnl_rtntype_a2n(&type, *argv))
+				invarg("Failed to parse rule type", *argv);
+			req.frh.action = type;
+			table_ok = 1;
+		}
+		argc--;
+		argv++;
+	}
+
+	if (l3mdev_rule && tid != 0) {
+		fprintf(stderr,
+			"table can not be specified for l3mdev rules\n");
+		return -EINVAL;
+	}
+
+	if (req.frh.family == AF_UNSPEC)
+		req.frh.family = AF_INET;
+
+	if (!table_ok && cmd == RTM_NEWRULE)
+		req.frh.table = RT_TABLE_MAIN;
+
+	if (echo_request)
+		ret = rtnl_echo_talk(&rth, &req.n, json, print_rule);
+	else
+		ret = rtnl_talk(&rth, &req.n, NULL);
+
+	if (ret)
+		return -2;
+
+	return 0;
+}
+
+int do_iprule(int argc, char **argv)
+{
+	if (argc < 1) {
+		return iprule_list_flush_or_save(0, NULL, IPRULE_LIST);
+	} else if (matches(argv[0], "list") == 0 ||
+		   matches(argv[0], "lst") == 0 ||
+		   matches(argv[0], "show") == 0) {
+		return iprule_list_flush_or_save(argc-1, argv+1, IPRULE_LIST);
+	} else if (matches(argv[0], "save") == 0) {
+		return iprule_list_flush_or_save(argc-1, argv+1, IPRULE_SAVE);
+	} else if (matches(argv[0], "restore") == 0) {
+		return iprule_restore();
+	} else if (matches(argv[0], "add") == 0) {
+		return iprule_modify(RTM_NEWRULE, argc-1, argv+1);
+	} else if (matches(argv[0], "delete") == 0) {
+		return iprule_modify(RTM_DELRULE, argc-1, argv+1);
+	} else if (matches(argv[0], "flush") == 0) {
+		return iprule_list_flush_or_save(argc-1, argv+1, IPRULE_FLUSH);
+	} else if (matches(argv[0], "help") == 0)
+		usage();
+
+	fprintf(stderr,
+		"Command \"%s\" is unknown, try \"ip rule help\".\n", *argv);
+	exit(-1);
+}
+
+int do_multirule(int argc, char **argv)
+{
+	switch (preferred_family) {
+	case AF_UNSPEC:
+	case AF_INET:
+		preferred_family = RTNL_FAMILY_IPMR;
+		break;
+	case AF_INET6:
+		preferred_family = RTNL_FAMILY_IP6MR;
+		break;
+	case RTNL_FAMILY_IPMR:
+	case RTNL_FAMILY_IP6MR:
+		break;
+	default:
+		fprintf(stderr,
+			"Multicast rules are only supported for IPv4/IPv6, was: %i\n",
+			preferred_family);
+		exit(-1);
+	}
+
+	return do_iprule(argc, argv);
+}