[mirror_iproute2.git] / ip / iprule.c

/*
 * iprule.c		"ip rule".
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 *
 * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <syslog.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/fib_rules.h>

#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"

extern struct rtnl_handle rth;

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

static void usage(void)
{
	fprintf(stderr, "Usage: ip rule [ list | add | del | flush ] SELECTOR ACTION\n");
	fprintf(stderr, "SELECTOR := [ not ] [ from PREFIX ] [ to PREFIX ] [ tos TOS ] [ fwmark FWMARK[/MASK] ]\n");
	fprintf(stderr, "            [ iif STRING ] [ oif STRING ] [ pref NUMBER ]\n");
	fprintf(stderr, "ACTION := [ table TABLE_ID ]\n");
	fprintf(stderr, "          [ prohibit | reject | unreachable ]\n");
	fprintf(stderr, "          [ realms [SRCREALM/]DSTREALM ]\n");
	fprintf(stderr, "          [ goto NUMBER ]\n");
	fprintf(stderr, "          SUPPRESSOR\n");
	fprintf(stderr, "SUPPRESSOR := [ suppress_prefixlength NUMBER ]\n");
	fprintf(stderr, "              [ suppress_ifgroup DEVGROUP ]\n");
	fprintf(stderr, "TABLE_ID := [ local | main | default | NUMBER ]\n");
	exit(-1);
}

int print_rule(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
{
	FILE *fp = (FILE*)arg;
	struct rtmsg *r = NLMSG_DATA(n);
	int len = n->nlmsg_len;
	int host_len = -1;
	__u32 table;
	struct rtattr * tb[FRA_MAX+1];
	char abuf[256];
	SPRINT_BUF(b1);

	if (n->nlmsg_type != RTM_NEWRULE && n->nlmsg_type != RTM_DELRULE)
		return 0;

	len -= NLMSG_LENGTH(sizeof(*r));
	if (len < 0)
		return -1;

	parse_rtattr(tb, FRA_MAX, RTM_RTA(r), len);

	host_len = af_bit_len(r->rtm_family);

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

	if (tb[FRA_PRIORITY])
		fprintf(fp, "%u:\t", *(unsigned*)RTA_DATA(tb[FRA_PRIORITY]));
	else
		fprintf(fp, "0:\t");

	if (r->rtm_flags & FIB_RULE_INVERT)
		fprintf(fp, "not ");

	if (tb[FRA_SRC]) {
		if (r->rtm_src_len != host_len) {
			fprintf(fp, "from %s/%u ", rt_addr_n2a(r->rtm_family,
						       RTA_PAYLOAD(tb[FRA_SRC]),
						       RTA_DATA(tb[FRA_SRC]),
						       abuf, sizeof(abuf)),
				r->rtm_src_len
				);
		} else {
			fprintf(fp, "from %s ", format_host(r->rtm_family,
						       RTA_PAYLOAD(tb[FRA_SRC]),
						       RTA_DATA(tb[FRA_SRC]),
						       abuf, sizeof(abuf))
				);
		}
	} else if (r->rtm_src_len) {
		fprintf(fp, "from 0/%d ", r->rtm_src_len);
	} else {
		fprintf(fp, "from all ");
	}

	if (tb[FRA_DST]) {
		if (r->rtm_dst_len != host_len) {
			fprintf(fp, "to %s/%u ", rt_addr_n2a(r->rtm_family,
						       RTA_PAYLOAD(tb[FRA_DST]),
						       RTA_DATA(tb[FRA_DST]),
						       abuf, sizeof(abuf)),
				r->rtm_dst_len
				);
		} else {
			fprintf(fp, "to %s ", format_host(r->rtm_family,
						       RTA_PAYLOAD(tb[FRA_DST]),
						       RTA_DATA(tb[FRA_DST]),
						       abuf, sizeof(abuf)));
		}
	} else if (r->rtm_dst_len) {
		fprintf(fp, "to 0/%d ", r->rtm_dst_len);
	}

	if (r->rtm_tos) {
		SPRINT_BUF(b1);
		fprintf(fp, "tos %s ", rtnl_dsfield_n2a(r->rtm_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)
			fprintf(fp, "fwmark 0x%x/0x%x ", mark, mask);
		else
			fprintf(fp, "fwmark 0x%x ", mark);
	}

	if (tb[FRA_IFNAME]) {
		fprintf(fp, "iif %s ", rta_getattr_str(tb[FRA_IFNAME]));
		if (r->rtm_flags & FIB_RULE_IIF_DETACHED)
			fprintf(fp, "[detached] ");
	}

	if (tb[FRA_OIFNAME]) {
		fprintf(fp, "oif %s ", rta_getattr_str(tb[FRA_OIFNAME]));
		if (r->rtm_flags & FIB_RULE_OIF_DETACHED)
			fprintf(fp, "[detached] ");
	}

	table = rtm_get_table(r, tb);
	if (table) {
		fprintf(fp, "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) {
				fprintf(fp, "suppress_prefixlength %d ", pl);
			}
		}
		if (tb[FRA_SUPPRESS_IFGROUP]) {
			int group = rta_getattr_u32(tb[FRA_SUPPRESS_IFGROUP]);
			if (group != -1) {
				SPRINT_BUF(b1);
				fprintf(fp, "suppress_ifgroup %s ", rtnl_group_n2a(group, b1, sizeof(b1)));
			}
		}
	}

	if (tb[FRA_FLOW]) {
		__u32 to = rta_getattr_u32(tb[FRA_FLOW]);
		__u32 from = to>>16;
		to &= 0xFFFF;
		if (from) {
			fprintf(fp, "realms %s/",
				rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
		}
		fprintf(fp, "%s ",
			rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
	}

	if (r->rtm_type == RTN_NAT) {
		if (tb[RTA_GATEWAY]) {
			fprintf(fp, "map-to %s ",
				format_host(r->rtm_family,
					    RTA_PAYLOAD(tb[RTA_GATEWAY]),
					    RTA_DATA(tb[RTA_GATEWAY]),
					    abuf, sizeof(abuf)));
		} else
			fprintf(fp, "masquerade");
	} else if (r->rtm_type == FR_ACT_GOTO) {
		fprintf(fp, "goto ");
		if (tb[FRA_GOTO])
			fprintf(fp, "%u", rta_getattr_u32(tb[FRA_GOTO]));
		else
			fprintf(fp, "none");
		if (r->rtm_flags & FIB_RULE_UNRESOLVED)
			fprintf(fp, " [unresolved]");
	} else if (r->rtm_type == FR_ACT_NOP)
		fprintf(fp, "nop");
	else if (r->rtm_type != RTN_UNICAST)
		fprintf(fp, "%s", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));

	fprintf(fp, "\n");
	fflush(fp);
	return 0;
}

static int iprule_list(int argc, char **argv)
{
	int af = preferred_family;

	if (af == AF_UNSPEC)
		af = AF_INET;

	if (argc > 0) {
		fprintf(stderr, "\"ip rule show\" does not take any arguments.\n");
		return -1;
	}

	if (rtnl_wilddump_request(&rth, af, RTM_GETRULE) < 0) {
		perror("Cannot send dump request");
		return 1;
	}

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

	return 0;
}


static int iprule_modify(int cmd, int argc, char **argv)
{
	int table_ok = 0;
	struct {
		struct nlmsghdr	n;
		struct rtmsg		r;
		char  			buf[1024];
	} req;

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

	req.n.nlmsg_type = cmd;
	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
	req.n.nlmsg_flags = NLM_F_REQUEST;
	req.r.rtm_family = preferred_family;
	req.r.rtm_protocol = RTPROT_BOOT;
	req.r.rtm_scope = RT_SCOPE_UNIVERSE;
	req.r.rtm_table = 0;
	req.r.rtm_type = RTN_UNSPEC;
	req.r.rtm_flags = 0;

	if (cmd == RTM_NEWRULE) {
		req.n.nlmsg_flags |= NLM_F_CREATE|NLM_F_EXCL;
		req.r.rtm_type = RTN_UNICAST;
	}

	while (argc > 0) {
		if (strcmp(*argv, "not") == 0) {
			req.r.rtm_flags |= FIB_RULE_INVERT;
		} else if (strcmp(*argv, "from") == 0) {
			inet_prefix dst;
			NEXT_ARG();
			get_prefix(&dst, *argv, req.r.rtm_family);
			req.r.rtm_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.r.rtm_family);
			req.r.rtm_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.r.rtm_tos = tos;
		} else if (strcmp(*argv, "fwmark") == 0) {
			char *slash;
			__u32 fwmark, fwmask;
			NEXT_ARG();
			if ((slash = strchr(*argv, '/')) != 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(&realm, *argv))
				invarg("invalid realms\n", *argv);
			addattr32(&req.n, sizeof(req), FRA_FLOW, realm);
		} else if (matches(*argv, "table") == 0 ||
			   strcmp(*argv, "lookup") == 0) {
			__u32 tid;
			NEXT_ARG();
			if (rtnl_rttable_a2n(&tid, *argv))
				invarg("invalid table ID\n", *argv);
			if (tid < 256)
				req.r.rtm_table = tid;
			else {
				req.r.rtm_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();
			addattr_l(&req.n, sizeof(req), FRA_IFNAME, *argv, strlen(*argv)+1);
		} else if (strcmp(*argv, "oif") == 0) {
			NEXT_ARG();
			addattr_l(&req.n, sizeof(req), FRA_OIFNAME, *argv, strlen(*argv)+1);
		} 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.r.rtm_type = RTN_NAT;
		} 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.r.rtm_type = type;
			table_ok = 1;
		}
		argc--;
		argv++;
	}

	if (req.r.rtm_family == AF_UNSPEC)
		req.r.rtm_family = AF_INET;

	if (!table_ok && cmd == RTM_NEWRULE)
		req.r.rtm_table = RT_TABLE_MAIN;

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

	return 0;
}


static int flush_rule(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
{
	struct rtnl_handle rth2;
	struct rtmsg *r = NLMSG_DATA(n);
	int len = n->nlmsg_len;
	struct rtattr * tb[FRA_MAX+1];

	len -= NLMSG_LENGTH(sizeof(*r));
	if (len < 0)
		return -1;

	parse_rtattr(tb, FRA_MAX, RTM_RTA(r), len);

	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, 0, 0, NULL) < 0)
			return -2;

		rtnl_close(&rth2);
	}

	return 0;
}

static int iprule_flush(int argc, char **argv)
{
	int af = preferred_family;

	if (af == AF_UNSPEC)
		af = AF_INET;

	if (argc > 0) {
		fprintf(stderr, "\"ip rule flush\" does not allow arguments\n");
		return -1;
	}

	if (rtnl_wilddump_request(&rth, af, RTM_GETRULE) < 0) {
		perror("Cannot send dump request");
		return 1;
	}

	if (rtnl_dump_filter(&rth, flush_rule, NULL) < 0) {
		fprintf(stderr, "Flush terminated\n");
		return 1;
	}

	return 0;
}

int do_iprule(int argc, char **argv)
{
	if (argc < 1) {
		return iprule_list(0, NULL);
	} else if (matches(argv[0], "list") == 0 ||
		   matches(argv[0], "lst") == 0 ||
		   matches(argv[0], "show") == 0) {
		return iprule_list(argc-1, argv+1);
	} 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_flush(argc-1, argv+1);
	} 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);
}
Commit	Line	Data
aba5acdf SH	1	/*
	2	* iprule.c "ip rule".
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation; either version
	7	* 2 of the License, or (at your option) any later version.
	8	*
	9	* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
	10	*
aba5acdf SH	11	*/
	12
	13	#include <stdio.h>
	14	#include <stdlib.h>
	15	#include <unistd.h>
	16	#include <syslog.h>
	17	#include <fcntl.h>
	18	#include <sys/socket.h>
	19	#include <netinet/in.h>
	20	#include <netinet/ip.h>
	21	#include <arpa/inet.h>
	22	#include <string.h>
3123a0cc	23	#include <linux/fib_rules.h>
aba5acdf SH	24
	25	#include "rt_names.h"
	26	#include "utils.h"
34e95647	27	#include "ip_common.h"
aba5acdf	28
351efcde SH	29	extern struct rtnl_handle rth;
351efcde SH	30
aba5acdf SH	31	static void usage(void) __attribute__((noreturn));
	32
	33	static void usage(void)
	34	{
50772dc5	35	fprintf(stderr, "Usage: ip rule [ list \| add \| del \| flush ] SELECTOR ACTION\n");
be7f286e	36	fprintf(stderr, "SELECTOR := [ not ] [ from PREFIX ] [ to PREFIX ] [ tos TOS ] [ fwmark FWMARK[/MASK] ]\n");
85eae222	37	fprintf(stderr, " [ iif STRING ] [ oif STRING ] [ pref NUMBER ]\n");
526afe40	38	fprintf(stderr, "ACTION := [ table TABLE_ID ]\n");
aba5acdf SH	39	fprintf(stderr, " [ prohibit \| reject \| unreachable ]\n");
aba5acdf SH	40	fprintf(stderr, " [ realms [SRCREALM/]DSTREALM ]\n");
6b469cae	41	fprintf(stderr, " [ goto NUMBER ]\n");
b1d0525f ST	42	fprintf(stderr, " SUPPRESSOR\n");
	43	fprintf(stderr, "SUPPRESSOR := [ suppress_prefixlength NUMBER ]\n");
	44	fprintf(stderr, " [ suppress_ifgroup DEVGROUP ]\n");
aba5acdf SH	45	fprintf(stderr, "TABLE_ID := [ local \| main \| default \| NUMBER ]\n");
	46	exit(-1);
	47	}
	48
98bde989	49	int print_rule(const struct sockaddr_nl who, struct nlmsghdr n, void *arg)
aba5acdf SH	50	{
	51	FILE fp = (FILE)arg;
	52	struct rtmsg *r = NLMSG_DATA(n);
	53	int len = n->nlmsg_len;
	54	int host_len = -1;
34e95647	55	__u32 table;
ad1a12db	56	struct rtattr * tb[FRA_MAX+1];
aba5acdf SH	57	char abuf[256];
	58	SPRINT_BUF(b1);
	59
98bde989	60	if (n->nlmsg_type != RTM_NEWRULE && n->nlmsg_type != RTM_DELRULE)
aba5acdf SH	61	return 0;
	62
	63	len -= NLMSG_LENGTH(sizeof(*r));
	64	if (len < 0)
	65	return -1;
	66
ad1a12db	67	parse_rtattr(tb, FRA_MAX, RTM_RTA(r), len);
aba5acdf	68
f3a2ddc1	69	host_len = af_bit_len(r->rtm_family);
aba5acdf	70
98bde989 TG	71	if (n->nlmsg_type == RTM_DELRULE)
	72	fprintf(fp, "Deleted ");
	73
ad1a12db PM	74	if (tb[FRA_PRIORITY])
ad1a12db PM	75	fprintf(fp, "%u:\t", (unsigned)RTA_DATA(tb[FRA_PRIORITY]));
aba5acdf SH	76	else
	77	fprintf(fp, "0:\t");
	78
3123a0cc TG	79	if (r->rtm_flags & FIB_RULE_INVERT)
	80	fprintf(fp, "not ");
	81
ad1a12db	82	if (tb[FRA_SRC]) {
aba5acdf SH	83	if (r->rtm_src_len != host_len) {
aba5acdf SH	84	fprintf(fp, "from %s/%u ", rt_addr_n2a(r->rtm_family,
26dcdf3a EB	85	RTA_PAYLOAD(tb[FRA_SRC]),
	86	RTA_DATA(tb[FRA_SRC]),
	87	abuf, sizeof(abuf)),
aba5acdf SH	88	r->rtm_src_len
	89	);
	90	} else {
	91	fprintf(fp, "from %s ", format_host(r->rtm_family,
ad1a12db PM	92	RTA_PAYLOAD(tb[FRA_SRC]),
ad1a12db PM	93	RTA_DATA(tb[FRA_SRC]),
aba5acdf SH	94	abuf, sizeof(abuf))
	95	);
	96	}
	97	} else if (r->rtm_src_len) {
	98	fprintf(fp, "from 0/%d ", r->rtm_src_len);
	99	} else {
	100	fprintf(fp, "from all ");
	101	}
	102
ad1a12db	103	if (tb[FRA_DST]) {
aba5acdf SH	104	if (r->rtm_dst_len != host_len) {
aba5acdf SH	105	fprintf(fp, "to %s/%u ", rt_addr_n2a(r->rtm_family,
26dcdf3a EB	106	RTA_PAYLOAD(tb[FRA_DST]),
	107	RTA_DATA(tb[FRA_DST]),
	108	abuf, sizeof(abuf)),
aba5acdf SH	109	r->rtm_dst_len
	110	);
	111	} else {
	112	fprintf(fp, "to %s ", format_host(r->rtm_family,
ad1a12db PM	113	RTA_PAYLOAD(tb[FRA_DST]),
ad1a12db PM	114	RTA_DATA(tb[FRA_DST]),
aba5acdf SH	115	abuf, sizeof(abuf)));
	116	}
	117	} else if (r->rtm_dst_len) {
	118	fprintf(fp, "to 0/%d ", r->rtm_dst_len);
	119	}
	120
	121	if (r->rtm_tos) {
	122	SPRINT_BUF(b1);
	123	fprintf(fp, "tos %s ", rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
	124	}
ad1a12db	125
4806867a	126	if (tb[FRA_FWMARK] \|\| tb[FRA_FWMASK]) {
be7f286e PM	127	__u32 mark = 0, mask = 0;
be7f286e PM	128
ad1a12db	129	if (tb[FRA_FWMARK])
ff24746c	130	mark = rta_getattr_u32(tb[FRA_FWMARK]);
be7f286e	131
ad1a12db	132	if (tb[FRA_FWMASK] &&
ff24746c	133	(mask = rta_getattr_u32(tb[FRA_FWMASK])) != 0xFFFFFFFF)
be7f286e	134	fprintf(fp, "fwmark 0x%x/0x%x ", mark, mask);
81c61790	135	else
be7f286e	136	fprintf(fp, "fwmark 0x%x ", mark);
aba5acdf SH	137	}
aba5acdf SH	138
ad1a12db	139	if (tb[FRA_IFNAME]) {
ff24746c	140	fprintf(fp, "iif %s ", rta_getattr_str(tb[FRA_IFNAME]));
85eae222 PM	141	if (r->rtm_flags & FIB_RULE_IIF_DETACHED)
	142	fprintf(fp, "[detached] ");
	143	}
	144
	145	if (tb[FRA_OIFNAME]) {
ff24746c	146	fprintf(fp, "oif %s ", rta_getattr_str(tb[FRA_OIFNAME]));
85eae222	147	if (r->rtm_flags & FIB_RULE_OIF_DETACHED)
6b469cae	148	fprintf(fp, "[detached] ");
aba5acdf SH	149	}
aba5acdf SH	150
34e95647	151	table = rtm_get_table(r, tb);
b1d0525f	152	if (table) {
34e95647	153	fprintf(fp, "lookup %s ", rtnl_rttable_n2a(table, b1, sizeof(b1)));
aba5acdf	154
b1d0525f ST	155	if (tb[FRA_SUPPRESS_PREFIXLEN]) {
	156	int pl = rta_getattr_u32(tb[FRA_SUPPRESS_PREFIXLEN]);
	157	if (pl != -1) {
	158	fprintf(fp, "suppress_prefixlength %d ", pl);
	159	}
	160	}
	161	if (tb[FRA_SUPPRESS_IFGROUP]) {
	162	int group = rta_getattr_u32(tb[FRA_SUPPRESS_IFGROUP]);
	163	if (group != -1) {
	164	SPRINT_BUF(b1);
	165	fprintf(fp, "suppress_ifgroup %s ", rtnl_group_n2a(group, b1, sizeof(b1)));
	166	}
	167	}
	168	}
	169
ad1a12db	170	if (tb[FRA_FLOW]) {
ff24746c	171	__u32 to = rta_getattr_u32(tb[FRA_FLOW]);
aba5acdf SH	172	__u32 from = to>>16;
	173	to &= 0xFFFF;
	174	if (from) {
	175	fprintf(fp, "realms %s/",
	176	rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
	177	}
	178	fprintf(fp, "%s ",
	179	rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
	180	}
	181
	182	if (r->rtm_type == RTN_NAT) {
	183	if (tb[RTA_GATEWAY]) {
ae665a52	184	fprintf(fp, "map-to %s ",
aba5acdf SH	185	format_host(r->rtm_family,
	186	RTA_PAYLOAD(tb[RTA_GATEWAY]),
	187	RTA_DATA(tb[RTA_GATEWAY]),
	188	abuf, sizeof(abuf)));
	189	} else
	190	fprintf(fp, "masquerade");
6b469cae TG	191	} else if (r->rtm_type == FR_ACT_GOTO) {
	192	fprintf(fp, "goto ");
	193	if (tb[FRA_GOTO])
ff24746c	194	fprintf(fp, "%u", rta_getattr_u32(tb[FRA_GOTO]));
6b469cae TG	195	else
	196	fprintf(fp, "none");
	197	if (r->rtm_flags & FIB_RULE_UNRESOLVED)
	198	fprintf(fp, " [unresolved]");
	199	} else if (r->rtm_type == FR_ACT_NOP)
	200	fprintf(fp, "nop");
	201	else if (r->rtm_type != RTN_UNICAST)
aba5acdf SH	202	fprintf(fp, "%s", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
	203
	204	fprintf(fp, "\n");
	205	fflush(fp);
	206	return 0;
	207	}
	208
50772dc5	209	static int iprule_list(int argc, char **argv)
aba5acdf	210	{
aba5acdf SH	211	int af = preferred_family;
	212
	213	if (af == AF_UNSPEC)
	214	af = AF_INET;
	215
	216	if (argc > 0) {
0284dcde	217	fprintf(stderr, "\"ip rule show\" does not take any arguments.\n");
aba5acdf SH	218	return -1;
	219	}
	220
aba5acdf SH	221	if (rtnl_wilddump_request(&rth, af, RTM_GETRULE) < 0) {
	222	perror("Cannot send dump request");
	223	return 1;
	224	}
	225
cd70f3f5	226	if (rtnl_dump_filter(&rth, print_rule, stdout) < 0) {
aba5acdf SH	227	fprintf(stderr, "Dump terminated\n");
	228	return 1;
	229	}
	230
	231	return 0;
	232	}
	233
	234
50772dc5	235	static int iprule_modify(int cmd, int argc, char **argv)
aba5acdf SH	236	{
aba5acdf SH	237	int table_ok = 0;
aba5acdf	238	struct {
4806867a SH	239	struct nlmsghdr n;
	240	struct rtmsg r;
	241	char buf[1024];
aba5acdf SH	242	} req;
	243
	244	memset(&req, 0, sizeof(req));
	245
	246	req.n.nlmsg_type = cmd;
	247	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
	248	req.n.nlmsg_flags = NLM_F_REQUEST;
	249	req.r.rtm_family = preferred_family;
	250	req.r.rtm_protocol = RTPROT_BOOT;
	251	req.r.rtm_scope = RT_SCOPE_UNIVERSE;
	252	req.r.rtm_table = 0;
	253	req.r.rtm_type = RTN_UNSPEC;
3123a0cc	254	req.r.rtm_flags = 0;
aba5acdf SH	255
	256	if (cmd == RTM_NEWRULE) {
	257	req.n.nlmsg_flags \|= NLM_F_CREATE\|NLM_F_EXCL;
	258	req.r.rtm_type = RTN_UNICAST;
	259	}
	260
	261	while (argc > 0) {
3123a0cc TG	262	if (strcmp(*argv, "not") == 0) {
	263	req.r.rtm_flags \|= FIB_RULE_INVERT;
	264	} else if (strcmp(*argv, "from") == 0) {
aba5acdf SH	265	inet_prefix dst;
	266	NEXT_ARG();
	267	get_prefix(&dst, *argv, req.r.rtm_family);
	268	req.r.rtm_src_len = dst.bitlen;
ad1a12db	269	addattr_l(&req.n, sizeof(req), FRA_SRC, &dst.data, dst.bytelen);
aba5acdf SH	270	} else if (strcmp(*argv, "to") == 0) {
	271	inet_prefix dst;
	272	NEXT_ARG();
	273	get_prefix(&dst, *argv, req.r.rtm_family);
	274	req.r.rtm_dst_len = dst.bitlen;
ad1a12db	275	addattr_l(&req.n, sizeof(req), FRA_DST, &dst.data, dst.bytelen);
aba5acdf SH	276	} else if (matches(*argv, "preference") == 0 \|\|
	277	matches(*argv, "order") == 0 \|\|
	278	matches(*argv, "priority") == 0) {
	279	__u32 pref;
	280	NEXT_ARG();
	281	if (get_u32(&pref, *argv, 0))
	282	invarg("preference value is invalid\n", *argv);
ad1a12db	283	addattr32(&req.n, sizeof(req), FRA_PRIORITY, pref);
dec01609 AH	284	} else if (strcmp(*argv, "tos") == 0 \|\|
dec01609 AH	285	matches(*argv, "dsfield") == 0) {
aba5acdf SH	286	__u32 tos;
	287	NEXT_ARG();
	288	if (rtnl_dsfield_a2n(&tos, *argv))
	289	invarg("TOS value is invalid\n", *argv);
	290	req.r.rtm_tos = tos;
	291	} else if (strcmp(*argv, "fwmark") == 0) {
be7f286e PM	292	char *slash;
be7f286e PM	293	__u32 fwmark, fwmask;
aba5acdf	294	NEXT_ARG();
be7f286e PM	295	if ((slash = strchr(*argv, '/')) != NULL)
be7f286e PM	296	*slash = '\0';
4fb466f9	297	if (get_u32(&fwmark, *argv, 0))
aba5acdf	298	invarg("fwmark value is invalid\n", *argv);
ad1a12db	299	addattr32(&req.n, sizeof(req), FRA_FWMARK, fwmark);
be7f286e PM	300	if (slash) {
	301	if (get_u32(&fwmask, slash+1, 0))
	302	invarg("fwmask value is invalid\n", slash+1);
ad1a12db	303	addattr32(&req.n, sizeof(req), FRA_FWMASK, fwmask);
be7f286e	304	}
aba5acdf SH	305	} else if (matches(*argv, "realms") == 0) {
	306	__u32 realm;
	307	NEXT_ARG();
	308	if (get_rt_realms(&realm, *argv))
	309	invarg("invalid realms\n", *argv);
ad1a12db	310	addattr32(&req.n, sizeof(req), FRA_FLOW, realm);
aba5acdf SH	311	} else if (matches(*argv, "table") == 0 \|\|
aba5acdf SH	312	strcmp(*argv, "lookup") == 0) {
f332d169	313	__u32 tid;
aba5acdf SH	314	NEXT_ARG();
	315	if (rtnl_rttable_a2n(&tid, *argv))
	316	invarg("invalid table ID\n", *argv);
34e95647 PM	317	if (tid < 256)
	318	req.r.rtm_table = tid;
	319	else {
	320	req.r.rtm_table = RT_TABLE_UNSPEC;
ad1a12db	321	addattr32(&req.n, sizeof(req), FRA_TABLE, tid);
34e95647	322	}
aba5acdf	323	table_ok = 1;
b1d0525f ST	324	} else if (matches(*argv, "suppress_prefixlength") == 0 \|\|
	325	strcmp(*argv, "sup_pl") == 0) {
	326	int pl;
	327	NEXT_ARG();
	328	if (get_s32(&pl, *argv, 0) \|\| pl < 0)
	329	invarg("suppress_prefixlength value is invalid\n", *argv);
	330	addattr32(&req.n, sizeof(req), FRA_SUPPRESS_PREFIXLEN, pl);
	331	} else if (matches(*argv, "suppress_ifgroup") == 0 \|\|
	332	strcmp(*argv, "sup_group") == 0) {
	333	NEXT_ARG();
	334	int group;
	335	if (rtnl_group_a2n(&group, *argv))
	336	invarg("Invalid \"suppress_ifgroup\" value\n", *argv);
	337	addattr32(&req.n, sizeof(req), FRA_SUPPRESS_IFGROUP, group);
aba5acdf SH	338	} else if (strcmp(*argv, "dev") == 0 \|\|
	339	strcmp(*argv, "iif") == 0) {
	340	NEXT_ARG();
ad1a12db	341	addattr_l(&req.n, sizeof(req), FRA_IFNAME, argv, strlen(argv)+1);
85eae222 PM	342	} else if (strcmp(*argv, "oif") == 0) {
	343	NEXT_ARG();
	344	addattr_l(&req.n, sizeof(req), FRA_OIFNAME, argv, strlen(argv)+1);
aba5acdf SH	345	} else if (strcmp(*argv, "nat") == 0 \|\|
	346	matches(*argv, "map-to") == 0) {
	347	NEXT_ARG();
526afe40	348	fprintf(stderr, "Warning: route NAT is deprecated\n");
aba5acdf SH	349	addattr32(&req.n, sizeof(req), RTA_GATEWAY, get_addr32(*argv));
	350	req.r.rtm_type = RTN_NAT;
	351	} else {
	352	int type;
	353
	354	if (strcmp(*argv, "type") == 0) {
	355	NEXT_ARG();
	356	}
	357	if (matches(*argv, "help") == 0)
	358	usage();
6b469cae TG	359	else if (matches(*argv, "goto") == 0) {
	360	__u32 target;
	361	type = FR_ACT_GOTO;
	362	NEXT_ARG();
	363	if (get_u32(&target, *argv, 0))
	364	invarg("invalid target\n", *argv);
	365	addattr32(&req.n, sizeof(req), FRA_GOTO, target);
	366	} else if (matches(*argv, "nop") == 0)
	367	type = FR_ACT_NOP;
	368	else if (rtnl_rtntype_a2n(&type, *argv))
aba5acdf SH	369	invarg("Failed to parse rule type", *argv);
aba5acdf SH	370	req.r.rtm_type = type;
6b469cae	371	table_ok = 1;
aba5acdf SH	372	}
	373	argc--;
	374	argv++;
	375	}
	376
	377	if (req.r.rtm_family == AF_UNSPEC)
	378	req.r.rtm_family = AF_INET;
	379
	380	if (!table_ok && cmd == RTM_NEWRULE)
	381	req.r.rtm_table = RT_TABLE_MAIN;
	382
cd70f3f5	383	if (rtnl_talk(&rth, &req.n, 0, 0, NULL) < 0)
aba5acdf SH	384	return 2;
	385
	386	return 0;
	387	}
	388
50772dc5 SH	389
	390	static int flush_rule(const struct sockaddr_nl who, struct nlmsghdr n, void *arg)
	391	{
b77caeba	392	struct rtnl_handle rth2;
50772dc5 SH	393	struct rtmsg *r = NLMSG_DATA(n);
50772dc5 SH	394	int len = n->nlmsg_len;
ad1a12db	395	struct rtattr * tb[FRA_MAX+1];
50772dc5 SH	396
	397	len -= NLMSG_LENGTH(sizeof(*r));
	398	if (len < 0)
	399	return -1;
	400
ad1a12db	401	parse_rtattr(tb, FRA_MAX, RTM_RTA(r), len);
50772dc5	402
ad1a12db	403	if (tb[FRA_PRIORITY]) {
50772dc5 SH	404	n->nlmsg_type = RTM_DELRULE;
	405	n->nlmsg_flags = NLM_F_REQUEST;
	406
b77caeba SH	407	if (rtnl_open(&rth2, 0) < 0)
	408	return -1;
	409
cd70f3f5	410	if (rtnl_talk(&rth2, n, 0, 0, NULL) < 0)
50772dc5	411	return -2;
b77caeba SH	412
b77caeba SH	413	rtnl_close(&rth2);
50772dc5 SH	414	}
	415
	416	return 0;
	417	}
	418
	419	static int iprule_flush(int argc, char **argv)
	420	{
50772dc5 SH	421	int af = preferred_family;
	422
	423	if (af == AF_UNSPEC)
	424	af = AF_INET;
	425
	426	if (argc > 0) {
66081849	427	fprintf(stderr, "\"ip rule flush\" does not allow arguments\n");
50772dc5 SH	428	return -1;
	429	}
	430
50772dc5 SH	431	if (rtnl_wilddump_request(&rth, af, RTM_GETRULE) < 0) {
	432	perror("Cannot send dump request");
	433	return 1;
	434	}
	435
cd70f3f5	436	if (rtnl_dump_filter(&rth, flush_rule, NULL) < 0) {
50772dc5 SH	437	fprintf(stderr, "Flush terminated\n");
	438	return 1;
	439	}
	440
	441	return 0;
	442	}
	443
aba5acdf SH	444	int do_iprule(int argc, char **argv)
	445	{
	446	if (argc < 1) {
	447	return iprule_list(0, NULL);
	448	} else if (matches(argv[0], "list") == 0 \|\|
	449	matches(argv[0], "lst") == 0 \|\|
	450	matches(argv[0], "show") == 0) {
	451	return iprule_list(argc-1, argv+1);
	452	} else if (matches(argv[0], "add") == 0) {
	453	return iprule_modify(RTM_NEWRULE, argc-1, argv+1);
	454	} else if (matches(argv[0], "delete") == 0) {
	455	return iprule_modify(RTM_DELRULE, argc-1, argv+1);
50772dc5 SH	456	} else if (matches(argv[0], "flush") == 0) {
50772dc5 SH	457	return iprule_flush(argc-1, argv+1);
aba5acdf SH	458	} else if (matches(argv[0], "help") == 0)
	459	usage();
	460
	461	fprintf(stderr, "Command \"%s\" is unknown, try \"ip rule help\".\n", *argv);
	462	exit(-1);
	463	}
	464
b6c8e808 PM	465	int do_multirule(int argc, char **argv)
	466	{
	467	switch (preferred_family) {
	468	case AF_UNSPEC:
	469	case AF_INET:
	470	preferred_family = RTNL_FAMILY_IPMR;
	471	break;
	472	case AF_INET6:
	473	preferred_family = RTNL_FAMILY_IP6MR;
	474	break;
0d1c9b57 BG	475	case RTNL_FAMILY_IPMR:
	476	case RTNL_FAMILY_IP6MR:
	477	break;
b6c8e808	478	default:
0d1c9b57 BG	479	fprintf(stderr, "Multicast rules are only supported for IPv4/IPv6, was: %i\n",
0d1c9b57 BG	480	preferred_family);
b6c8e808 PM	481	exit(-1);
	482	}
	483
	484	return do_iprule(argc, argv);
	485	}