[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, "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);

	if (r->rtm_family == AF_INET)
		host_len = 32;
	else if (r->rtm_family == AF_INET6)
		host_len = 128;
	else if (r->rtm_family == AF_DECnet)
		host_len = 16;
	else if (r->rtm_family == AF_IPX)
		host_len = 80;

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