[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>
 *
 *
 * Changes:
 *
 * Rani Assaf <rani@magic.metawire.com> 980929:	resolve addresses
 */

#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, "            [ dev 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, "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[RTA_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, RTA_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[RTA_PRIORITY])
		fprintf(fp, "%u:\t", *(unsigned*)RTA_DATA(tb[RTA_PRIORITY]));
	else
		fprintf(fp, "0:\t");

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

	if (tb[RTA_SRC]) {
		if (r->rtm_src_len != host_len) {
			fprintf(fp, "from %s/%u ", rt_addr_n2a(r->rtm_family,
							 RTA_PAYLOAD(tb[RTA_SRC]),
							 RTA_DATA(tb[RTA_SRC]),
							 abuf, sizeof(abuf)),
				r->rtm_src_len
				);
		} else {
			fprintf(fp, "from %s ", format_host(r->rtm_family,
						       RTA_PAYLOAD(tb[RTA_SRC]),
						       RTA_DATA(tb[RTA_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[RTA_DST]) {
		if (r->rtm_dst_len != host_len) {
			fprintf(fp, "to %s/%u ", rt_addr_n2a(r->rtm_family,
							 RTA_PAYLOAD(tb[RTA_DST]),
							 RTA_DATA(tb[RTA_DST]),
							 abuf, sizeof(abuf)),
				r->rtm_dst_len
				);
		} else {
			fprintf(fp, "to %s ", format_host(r->rtm_family,
						       RTA_PAYLOAD(tb[RTA_DST]),
						       RTA_DATA(tb[RTA_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[RTA_PROTOINFO] || tb[RTA_FWMASK]) {
		__u32 mark = 0, mask = 0;

		if (tb[RTA_PROTOINFO])
			mark = *(__u32*)RTA_DATA(tb[RTA_PROTOINFO]);

		if (tb[RTA_FWMASK] &&
		    (mask = *(__u32*)RTA_DATA(tb[RTA_FWMASK])) != 0xFFFFFFFF)
			fprintf(fp, "fwmark 0x%x/0x%x ", mark, mask);
		else
			fprintf(fp, "fwmark 0x%x ", mark);
	}

	if (tb[RTA_IIF]) {
		fprintf(fp, "iif %s ", (char*)RTA_DATA(tb[RTA_IIF]));
	}

	table = rtm_get_table(r, tb);
	if (table)
		fprintf(fp, "lookup %s ", rtnl_rttable_n2a(table, b1, sizeof(b1)));

	if (tb[RTA_FLOW]) {
		__u32 to = *(__u32*)RTA_DATA(tb[RTA_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 != 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, NULL, NULL) < 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), RTA_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), RTA_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), RTA_PRIORITY, pref);
		} else if (strcmp(*argv, "tos") == 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), RTA_PROTOINFO, fwmark);
			if (slash) {
				if (get_u32(&fwmask, slash+1, 0))
					invarg("fwmask value is invalid\n", slash+1);
				addattr32(&req.n, sizeof(req), RTA_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), RTA_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), RTA_TABLE, tid);
			}
			table_ok = 1;
		} else if (strcmp(*argv, "dev") == 0 ||
			   strcmp(*argv, "iif") == 0) {
			NEXT_ARG();
			addattr_l(&req.n, sizeof(req), RTA_IIF, *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();
			if (rtnl_rtntype_a2n(&type, *argv))
				invarg("Failed to parse rule type", *argv);
			req.r.rtm_type = type;
		}
		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, NULL, 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[RTA_MAX+1];

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

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

	if (tb[RTA_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, NULL, 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, NULL, 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);
}
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	*
	11	*
	12	* Changes:
	13	*
	14	* Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
	15	*/
	16
	17	#include <stdio.h>
	18	#include <stdlib.h>
	19	#include <unistd.h>
	20	#include <syslog.h>
	21	#include <fcntl.h>
	22	#include <sys/socket.h>
	23	#include <netinet/in.h>
	24	#include <netinet/ip.h>
	25	#include <arpa/inet.h>
	26	#include <string.h>
3123a0cc	27	#include <linux/fib_rules.h>
aba5acdf SH	28
	29	#include "rt_names.h"
	30	#include "utils.h"
34e95647	31	#include "ip_common.h"
aba5acdf	32
351efcde SH	33	extern struct rtnl_handle rth;
351efcde SH	34
aba5acdf SH	35	static void usage(void) __attribute__((noreturn));
	36
	37	static void usage(void)
	38	{
50772dc5	39	fprintf(stderr, "Usage: ip rule [ list \| add \| del \| flush ] SELECTOR ACTION\n");
be7f286e	40	fprintf(stderr, "SELECTOR := [ not ] [ from PREFIX ] [ to PREFIX ] [ tos TOS ] [ fwmark FWMARK[/MASK] ]\n");
aba5acdf	41	fprintf(stderr, " [ dev STRING ] [ pref NUMBER ]\n");
526afe40	42	fprintf(stderr, "ACTION := [ table TABLE_ID ]\n");
aba5acdf SH	43	fprintf(stderr, " [ prohibit \| reject \| unreachable ]\n");
	44	fprintf(stderr, " [ realms [SRCREALM/]DSTREALM ]\n");
	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;
aba5acdf SH	56	struct rtattr * tb[RTA_MAX+1];
	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
aba5acdf SH	67	parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
	68
	69	if (r->rtm_family == AF_INET)
	70	host_len = 32;
	71	else if (r->rtm_family == AF_INET6)
	72	host_len = 128;
	73	else if (r->rtm_family == AF_DECnet)
	74	host_len = 16;
	75	else if (r->rtm_family == AF_IPX)
	76	host_len = 80;
	77
98bde989 TG	78	if (n->nlmsg_type == RTM_DELRULE)
	79	fprintf(fp, "Deleted ");
	80
aba5acdf SH	81	if (tb[RTA_PRIORITY])
	82	fprintf(fp, "%u:\t", (unsigned)RTA_DATA(tb[RTA_PRIORITY]));
	83	else
	84	fprintf(fp, "0:\t");
	85
3123a0cc TG	86	if (r->rtm_flags & FIB_RULE_INVERT)
	87	fprintf(fp, "not ");
	88
aba5acdf SH	89	if (tb[RTA_SRC]) {
	90	if (r->rtm_src_len != host_len) {
	91	fprintf(fp, "from %s/%u ", rt_addr_n2a(r->rtm_family,
	92	RTA_PAYLOAD(tb[RTA_SRC]),
	93	RTA_DATA(tb[RTA_SRC]),
	94	abuf, sizeof(abuf)),
	95	r->rtm_src_len
	96	);
	97	} else {
	98	fprintf(fp, "from %s ", format_host(r->rtm_family,
	99	RTA_PAYLOAD(tb[RTA_SRC]),
	100	RTA_DATA(tb[RTA_SRC]),
	101	abuf, sizeof(abuf))
	102	);
	103	}
	104	} else if (r->rtm_src_len) {
	105	fprintf(fp, "from 0/%d ", r->rtm_src_len);
	106	} else {
	107	fprintf(fp, "from all ");
	108	}
	109
	110	if (tb[RTA_DST]) {
	111	if (r->rtm_dst_len != host_len) {
	112	fprintf(fp, "to %s/%u ", rt_addr_n2a(r->rtm_family,
	113	RTA_PAYLOAD(tb[RTA_DST]),
	114	RTA_DATA(tb[RTA_DST]),
	115	abuf, sizeof(abuf)),
	116	r->rtm_dst_len
	117	);
	118	} else {
	119	fprintf(fp, "to %s ", format_host(r->rtm_family,
	120	RTA_PAYLOAD(tb[RTA_DST]),
	121	RTA_DATA(tb[RTA_DST]),
	122	abuf, sizeof(abuf)));
	123	}
	124	} else if (r->rtm_dst_len) {
	125	fprintf(fp, "to 0/%d ", r->rtm_dst_len);
	126	}
	127
	128	if (r->rtm_tos) {
	129	SPRINT_BUF(b1);
	130	fprintf(fp, "tos %s ", rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
	131	}
be7f286e PM	132	if (tb[RTA_PROTOINFO] \|\| tb[RTA_FWMASK]) {
	133	__u32 mark = 0, mask = 0;
	134
	135	if (tb[RTA_PROTOINFO])
	136	mark = (__u32)RTA_DATA(tb[RTA_PROTOINFO]);
	137
	138	if (tb[RTA_FWMASK] &&
	139	(mask = (__u32)RTA_DATA(tb[RTA_FWMASK])) != 0xFFFFFFFF)
	140	fprintf(fp, "fwmark 0x%x/0x%x ", mark, mask);
81c61790	141	else
be7f286e	142	fprintf(fp, "fwmark 0x%x ", mark);
aba5acdf SH	143	}
	144
	145	if (tb[RTA_IIF]) {
	146	fprintf(fp, "iif %s ", (char*)RTA_DATA(tb[RTA_IIF]));
	147	}
	148
34e95647 PM	149	table = rtm_get_table(r, tb);
	150	if (table)
	151	fprintf(fp, "lookup %s ", rtnl_rttable_n2a(table, b1, sizeof(b1)));
aba5acdf SH	152
	153	if (tb[RTA_FLOW]) {
	154	__u32 to = (__u32)RTA_DATA(tb[RTA_FLOW]);
	155	__u32 from = to>>16;
	156	to &= 0xFFFF;
	157	if (from) {
	158	fprintf(fp, "realms %s/",
	159	rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
	160	}
	161	fprintf(fp, "%s ",
	162	rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
	163	}
	164
	165	if (r->rtm_type == RTN_NAT) {
	166	if (tb[RTA_GATEWAY]) {
ae665a52	167	fprintf(fp, "map-to %s ",
aba5acdf SH	168	format_host(r->rtm_family,
	169	RTA_PAYLOAD(tb[RTA_GATEWAY]),
	170	RTA_DATA(tb[RTA_GATEWAY]),
	171	abuf, sizeof(abuf)));
	172	} else
	173	fprintf(fp, "masquerade");
	174	} else if (r->rtm_type != RTN_UNICAST)
	175	fprintf(fp, "%s", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
	176
	177	fprintf(fp, "\n");
	178	fflush(fp);
	179	return 0;
	180	}
	181
50772dc5	182	static int iprule_list(int argc, char **argv)
aba5acdf	183	{
aba5acdf SH	184	int af = preferred_family;
	185
	186	if (af == AF_UNSPEC)
	187	af = AF_INET;
	188
	189	if (argc > 0) {
0284dcde	190	fprintf(stderr, "\"ip rule show\" does not take any arguments.\n");
aba5acdf SH	191	return -1;
	192	}
	193
aba5acdf SH	194	if (rtnl_wilddump_request(&rth, af, RTM_GETRULE) < 0) {
	195	perror("Cannot send dump request");
	196	return 1;
	197	}
	198
	199	if (rtnl_dump_filter(&rth, print_rule, stdout, NULL, NULL) < 0) {
	200	fprintf(stderr, "Dump terminated\n");
	201	return 1;
	202	}
	203
	204	return 0;
	205	}
	206
	207
50772dc5	208	static int iprule_modify(int cmd, int argc, char **argv)
aba5acdf SH	209	{
aba5acdf SH	210	int table_ok = 0;
aba5acdf SH	211	struct {
	212	struct nlmsghdr n;
	213	struct rtmsg r;
	214	char buf[1024];
	215	} req;
	216
	217	memset(&req, 0, sizeof(req));
	218
	219	req.n.nlmsg_type = cmd;
	220	req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
	221	req.n.nlmsg_flags = NLM_F_REQUEST;
	222	req.r.rtm_family = preferred_family;
	223	req.r.rtm_protocol = RTPROT_BOOT;
	224	req.r.rtm_scope = RT_SCOPE_UNIVERSE;
	225	req.r.rtm_table = 0;
	226	req.r.rtm_type = RTN_UNSPEC;
3123a0cc	227	req.r.rtm_flags = 0;
aba5acdf SH	228
	229	if (cmd == RTM_NEWRULE) {
	230	req.n.nlmsg_flags \|= NLM_F_CREATE\|NLM_F_EXCL;
	231	req.r.rtm_type = RTN_UNICAST;
	232	}
	233
	234	while (argc > 0) {
3123a0cc TG	235	if (strcmp(*argv, "not") == 0) {
	236	req.r.rtm_flags \|= FIB_RULE_INVERT;
	237	} else if (strcmp(*argv, "from") == 0) {
aba5acdf SH	238	inet_prefix dst;
	239	NEXT_ARG();
	240	get_prefix(&dst, *argv, req.r.rtm_family);
	241	req.r.rtm_src_len = dst.bitlen;
	242	addattr_l(&req.n, sizeof(req), RTA_SRC, &dst.data, dst.bytelen);
	243	} else if (strcmp(*argv, "to") == 0) {
	244	inet_prefix dst;
	245	NEXT_ARG();
	246	get_prefix(&dst, *argv, req.r.rtm_family);
	247	req.r.rtm_dst_len = dst.bitlen;
	248	addattr_l(&req.n, sizeof(req), RTA_DST, &dst.data, dst.bytelen);
	249	} else if (matches(*argv, "preference") == 0 \|\|
	250	matches(*argv, "order") == 0 \|\|
	251	matches(*argv, "priority") == 0) {
	252	__u32 pref;
	253	NEXT_ARG();
	254	if (get_u32(&pref, *argv, 0))
	255	invarg("preference value is invalid\n", *argv);
	256	addattr32(&req.n, sizeof(req), RTA_PRIORITY, pref);
	257	} else if (strcmp(*argv, "tos") == 0) {
	258	__u32 tos;
	259	NEXT_ARG();
	260	if (rtnl_dsfield_a2n(&tos, *argv))
	261	invarg("TOS value is invalid\n", *argv);
	262	req.r.rtm_tos = tos;
	263	} else if (strcmp(*argv, "fwmark") == 0) {
be7f286e PM	264	char *slash;
be7f286e PM	265	__u32 fwmark, fwmask;
aba5acdf	266	NEXT_ARG();
be7f286e PM	267	if ((slash = strchr(*argv, '/')) != NULL)
be7f286e PM	268	*slash = '\0';
4fb466f9	269	if (get_u32(&fwmark, *argv, 0))
aba5acdf SH	270	invarg("fwmark value is invalid\n", *argv);
aba5acdf SH	271	addattr32(&req.n, sizeof(req), RTA_PROTOINFO, fwmark);
be7f286e PM	272	if (slash) {
	273	if (get_u32(&fwmask, slash+1, 0))
	274	invarg("fwmask value is invalid\n", slash+1);
	275	addattr32(&req.n, sizeof(req), RTA_FWMASK, fwmask);
	276	}
aba5acdf SH	277	} else if (matches(*argv, "realms") == 0) {
	278	__u32 realm;
	279	NEXT_ARG();
	280	if (get_rt_realms(&realm, *argv))
	281	invarg("invalid realms\n", *argv);
	282	addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
	283	} else if (matches(*argv, "table") == 0 \|\|
	284	strcmp(*argv, "lookup") == 0) {
f332d169	285	__u32 tid;
aba5acdf SH	286	NEXT_ARG();
	287	if (rtnl_rttable_a2n(&tid, *argv))
	288	invarg("invalid table ID\n", *argv);
34e95647 PM	289	if (tid < 256)
	290	req.r.rtm_table = tid;
	291	else {
	292	req.r.rtm_table = RT_TABLE_UNSPEC;
	293	addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
	294	}
aba5acdf SH	295	table_ok = 1;
	296	} else if (strcmp(*argv, "dev") == 0 \|\|
	297	strcmp(*argv, "iif") == 0) {
	298	NEXT_ARG();
	299	addattr_l(&req.n, sizeof(req), RTA_IIF, argv, strlen(argv)+1);
	300	} else if (strcmp(*argv, "nat") == 0 \|\|
	301	matches(*argv, "map-to") == 0) {
	302	NEXT_ARG();
526afe40	303	fprintf(stderr, "Warning: route NAT is deprecated\n");
aba5acdf SH	304	addattr32(&req.n, sizeof(req), RTA_GATEWAY, get_addr32(*argv));
	305	req.r.rtm_type = RTN_NAT;
	306	} else {
	307	int type;
	308
	309	if (strcmp(*argv, "type") == 0) {
	310	NEXT_ARG();
	311	}
	312	if (matches(*argv, "help") == 0)
	313	usage();
	314	if (rtnl_rtntype_a2n(&type, *argv))
	315	invarg("Failed to parse rule type", *argv);
	316	req.r.rtm_type = type;
	317	}
	318	argc--;
	319	argv++;
	320	}
	321
	322	if (req.r.rtm_family == AF_UNSPEC)
	323	req.r.rtm_family = AF_INET;
	324
	325	if (!table_ok && cmd == RTM_NEWRULE)
	326	req.r.rtm_table = RT_TABLE_MAIN;
	327
aba5acdf SH	328	if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
	329	return 2;
	330
	331	return 0;
	332	}
	333
50772dc5 SH	334
	335	static int flush_rule(const struct sockaddr_nl who, struct nlmsghdr n, void *arg)
	336	{
b77caeba	337	struct rtnl_handle rth2;
50772dc5 SH	338	struct rtmsg *r = NLMSG_DATA(n);
	339	int len = n->nlmsg_len;
	340	struct rtattr * tb[RTA_MAX+1];
	341
	342	len -= NLMSG_LENGTH(sizeof(*r));
	343	if (len < 0)
	344	return -1;
	345
50772dc5 SH	346	parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
	347
	348	if (tb[RTA_PRIORITY]) {
	349	n->nlmsg_type = RTM_DELRULE;
	350	n->nlmsg_flags = NLM_F_REQUEST;
	351
b77caeba SH	352	if (rtnl_open(&rth2, 0) < 0)
	353	return -1;
	354
	355	if (rtnl_talk(&rth2, n, 0, 0, NULL, NULL, NULL) < 0)
50772dc5	356	return -2;
b77caeba SH	357
b77caeba SH	358	rtnl_close(&rth2);
50772dc5 SH	359	}
	360
	361	return 0;
	362	}
	363
	364	static int iprule_flush(int argc, char **argv)
	365	{
50772dc5 SH	366	int af = preferred_family;
	367
	368	if (af == AF_UNSPEC)
	369	af = AF_INET;
	370
	371	if (argc > 0) {
66081849	372	fprintf(stderr, "\"ip rule flush\" does not allow arguments\n");
50772dc5 SH	373	return -1;
	374	}
	375
50772dc5 SH	376	if (rtnl_wilddump_request(&rth, af, RTM_GETRULE) < 0) {
	377	perror("Cannot send dump request");
	378	return 1;
	379	}
	380
	381	if (rtnl_dump_filter(&rth, flush_rule, NULL, NULL, NULL) < 0) {
	382	fprintf(stderr, "Flush terminated\n");
	383	return 1;
	384	}
	385
	386	return 0;
	387	}
	388
aba5acdf SH	389	int do_iprule(int argc, char **argv)
	390	{
	391	if (argc < 1) {
	392	return iprule_list(0, NULL);
	393	} else if (matches(argv[0], "list") == 0 \|\|
	394	matches(argv[0], "lst") == 0 \|\|
	395	matches(argv[0], "show") == 0) {
	396	return iprule_list(argc-1, argv+1);
	397	} else if (matches(argv[0], "add") == 0) {
	398	return iprule_modify(RTM_NEWRULE, argc-1, argv+1);
	399	} else if (matches(argv[0], "delete") == 0) {
	400	return iprule_modify(RTM_DELRULE, argc-1, argv+1);
50772dc5 SH	401	} else if (matches(argv[0], "flush") == 0) {
50772dc5 SH	402	return iprule_flush(argc-1, argv+1);
aba5acdf SH	403	} else if (matches(argv[0], "help") == 0)
	404	usage();
	405
	406	fprintf(stderr, "Command \"%s\" is unknown, try \"ip rule help\".\n", *argv);
	407	exit(-1);
	408	}
	409