tc/f_rsvp.c - maze/iproute2 - Git at Google

 /*
  * q_rsvp.c		RSVP filter.
  *
  *		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 <arpa/inet.h>
 #include <string.h>

 #include "rt_names.h"
 #include "utils.h"
 #include "tc_util.h"

 static void explain(void)
 {
 	fprintf(stderr, "Usage: ... rsvp ipproto PROTOCOL session DST[/PORT | GPI ]\n");
 	fprintf(stderr, "                [ sender SRC[/PORT | GPI ]\n");
 	fprintf(stderr, "                [ classid CLASSID ] [ police POLICE_SPEC ]\n");
 	fprintf(stderr, "                [ tunnelid ID ] [ tunnel ID skip NUMBER ]\n");
 	fprintf(stderr, "Where: GPI := { flowlabel NUMBER | spi/ah SPI | spi/esp SPI |\n");
 	fprintf(stderr, "                u{8|16|32} NUMBER mask MASK at OFFSET}\n");
 	fprintf(stderr, "       POLICE_SPEC := ... look at TBF\n");
 	fprintf(stderr, "       FILTERID := X:Y\n");
 	fprintf(stderr, "\nNOTE: CLASSID is parsed as hexadecimal input.\n");
 }

 static int get_addr_and_pi(int *argc_p, char ***argv_p, inet_prefix * addr,
 		    struct tc_rsvp_pinfo *pinfo, int dir, int family)
 {
 	int argc = *argc_p;
 	char **argv = *argv_p;
 	char *p = strchr(*argv, '/');
 	struct tc_rsvp_gpi *pi = dir ? &pinfo->dpi : &pinfo->spi;

 	if (p) {
 		__u16 tmp;

 		if (get_u16(&tmp, p+1, 0))
 			return -1;

 		if (dir == 0) {
 			/* Source port: u16 at offset 0 */
 			pi->key = htonl(((__u32)tmp)<<16);
 			pi->mask = htonl(0xFFFF0000);
 		} else {
 			/* Destination port: u16 at offset 2 */
 			pi->key = htonl(((__u32)tmp));
 			pi->mask = htonl(0x0000FFFF);
 		}
 		pi->offset = 0;
 		*p = 0;
 	}
 	if (get_addr_1(addr, *argv, family))
 		return -1;
 	if (p)
 		*p = '/';

 	argc--; argv++;

 	if (pi->mask || argc <= 0)
 		goto done;

 	if (strcmp(*argv, "spi/ah") == 0 ||
 	    strcmp(*argv, "gpi/ah") == 0) {
 		__u32 gpi;
 		NEXT_ARG();
 		if (get_u32(&gpi, *argv, 0))
 			return -1;
 		pi->mask = htonl(0xFFFFFFFF);
 		pi->key = htonl(gpi);
 		pi->offset = 4;
 		if (pinfo->protocol == 0)
 			pinfo->protocol = IPPROTO_AH;
 		argc--; argv++;
 	} else if (strcmp(*argv, "spi/esp") == 0 ||
 		   strcmp(*argv, "gpi/esp") == 0) {
 		__u32 gpi;
 		NEXT_ARG();
 		if (get_u32(&gpi, *argv, 0))
 			return -1;
 		pi->mask = htonl(0xFFFFFFFF);
 		pi->key = htonl(gpi);
 		pi->offset = 0;
 		if (pinfo->protocol == 0)
 			pinfo->protocol = IPPROTO_ESP;
 		argc--; argv++;
 	} else if (strcmp(*argv, "flowlabel") == 0) {
 		__u32 flabel;
 		NEXT_ARG();
 		if (get_u32(&flabel, *argv, 0))
 			return -1;
 		if (family != AF_INET6)
 			return -1;
 		pi->mask = htonl(0x000FFFFF);
 		pi->key = htonl(flabel) & pi->mask;
 		pi->offset = -40;
 		argc--; argv++;
 	} else if (strcmp(*argv, "u32") == 0 ||
 		   strcmp(*argv, "u16") == 0 ||
 		   strcmp(*argv, "u8") == 0) {
 		int sz = 1;
 		__u32 tmp;
 		__u32 mask = 0xff;
 		if (strcmp(*argv, "u32") == 0) {
 			sz = 4;
 			mask = 0xffff;
 		} else if (strcmp(*argv, "u16") == 0) {
 			mask = 0xffffffff;
 			sz = 2;
 		}
 		NEXT_ARG();
 		if (get_u32(&tmp, *argv, 0))
 			return -1;
 		argc--; argv++;
 		if (strcmp(*argv, "mask") == 0) {
 			NEXT_ARG();
 			if (get_u32(&mask, *argv, 16))
 				return -1;
 			argc--; argv++;
 		}
 		if (strcmp(*argv, "at") == 0) {
 			NEXT_ARG();
 			if (get_integer(&pi->offset, *argv, 0))
 				return -1;
 			argc--; argv++;
 		}
 		if (sz == 1) {
 			if ((pi->offset & 3) == 0) {
 				mask <<= 24;
 				tmp <<= 24;
 			} else if ((pi->offset & 3) == 1) {
 				mask <<= 16;
 				tmp <<= 16;
 			} else if ((pi->offset & 3) == 3) {
 				mask <<= 8;
 				tmp <<= 8;
 			}
 		} else if (sz == 2) {
 			if ((pi->offset & 3) == 0) {
 				mask <<= 16;
 				tmp <<= 16;
 			}
 		}
 		pi->offset &= ~3;
 		pi->mask = htonl(mask);
 		pi->key = htonl(tmp) & pi->mask;
 	}

 done:
 	*argc_p = argc;
 	*argv_p = argv;
 	return 0;
 }


 static int rsvp_parse_opt(struct filter_util *qu, char *handle, int argc, char **argv, struct nlmsghdr *n)
 {
 	int family = strcmp(qu->id, "rsvp") == 0 ? AF_INET : AF_INET6;
 	struct tc_rsvp_pinfo pinfo;
 	struct tc_police tp;
 	struct tcmsg *t = NLMSG_DATA(n);
 	int pinfo_ok = 0;
 	struct rtattr *tail;

 	memset(&pinfo, 0, sizeof(pinfo));
 	memset(&tp, 0, sizeof(tp));

 	if (handle) {
 		if (get_u32(&t->tcm_handle, handle, 0)) {
 			fprintf(stderr, "Illegal \"handle\"\n");
 			return -1;
 		}
 	}

 	if (argc == 0)
 		return 0;

 	tail = NLMSG_TAIL(n);
 	addattr_l(n, 4096, TCA_OPTIONS, NULL, 0);

 	while (argc > 0) {
 		if (matches(*argv, "session") == 0) {
 			inet_prefix addr;
 			NEXT_ARG();
 			if (get_addr_and_pi(&argc, &argv, &addr, &pinfo, 1, family)) {
 				fprintf(stderr, "Illegal \"session\"\n");
 				return -1;
 			}
 			addattr_l(n, 4096, TCA_RSVP_DST, &addr.data, addr.bytelen);
 			if (pinfo.dpi.mask || pinfo.protocol)
 				pinfo_ok++;
 			continue;
 		} else if (matches(*argv, "sender") == 0 ||
 			   matches(*argv, "flowspec") == 0) {
 			inet_prefix addr;
 			NEXT_ARG();
 			if (get_addr_and_pi(&argc, &argv, &addr, &pinfo, 0, family)) {
 				fprintf(stderr, "Illegal \"sender\"\n");
 				return -1;
 			}
 			addattr_l(n, 4096, TCA_RSVP_SRC, &addr.data, addr.bytelen);
 			if (pinfo.spi.mask || pinfo.protocol)
 				pinfo_ok++;
 			continue;
 		} else if (matches("ipproto", *argv) == 0) {
 			int num;
 			NEXT_ARG();
 			num = inet_proto_a2n(*argv);
 			if (num < 0) {
 				fprintf(stderr, "Illegal \"ipproto\"\n");
 				return -1;
 			}
 			pinfo.protocol = num;
 			pinfo_ok++;
 		} else if (matches(*argv, "classid") == 0 ||
 			   strcmp(*argv, "flowid") == 0) {
 			unsigned handle;
 			NEXT_ARG();
 			if (get_tc_classid(&handle, *argv)) {
 				fprintf(stderr, "Illegal \"classid\"\n");
 				return -1;
 			}
 			addattr_l(n, 4096, TCA_RSVP_CLASSID, &handle, 4);
 		} else if (strcmp(*argv, "tunnelid") == 0) {
 			unsigned tid;
 			NEXT_ARG();
 			if (get_unsigned(&tid, *argv, 0)) {
 				fprintf(stderr, "Illegal \"tunnelid\"\n");
 				return -1;
 			}
 			pinfo.tunnelid = tid;
 			pinfo_ok++;
 		} else if (strcmp(*argv, "tunnel") == 0) {
 			unsigned tid;
 			NEXT_ARG();
 			if (get_unsigned(&tid, *argv, 0)) {
 				fprintf(stderr, "Illegal \"tunnel\"\n");
 				return -1;
 			}
 			addattr_l(n, 4096, TCA_RSVP_CLASSID, &tid, 4);
 			NEXT_ARG();
 			if (strcmp(*argv, "skip") == 0) {
 				NEXT_ARG();
 			}
 			if (get_unsigned(&tid, *argv, 0)) {
 				fprintf(stderr, "Illegal \"skip\"\n");
 				return -1;
 			}
 			pinfo.tunnelhdr = tid;
 			pinfo_ok++;
 		} else if (matches(*argv, "police") == 0) {
 			NEXT_ARG();
 			if (parse_police(&argc, &argv, TCA_RSVP_POLICE, n)) {
 				fprintf(stderr, "Illegal \"police\"\n");
 				return -1;
 			}
 			continue;
 		} else if (strcmp(*argv, "help") == 0) {
 			explain();
 			return -1;
 		} else {
 			fprintf(stderr, "What is \"%s\"?\n", *argv);
 			explain();
 			return -1;
 		}
 		argc--; argv++;
 	}

 	if (pinfo_ok)
 		addattr_l(n, 4096, TCA_RSVP_PINFO, &pinfo, sizeof(pinfo));
 	tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
 	return 0;
 }

 static char * sprint_spi(struct tc_rsvp_gpi *pi, int dir, char *buf)
 {
 	if (pi->offset == 0) {
 		if (dir && pi->mask == htonl(0xFFFF)) {
 			snprintf(buf, SPRINT_BSIZE-1, "/%d", htonl(pi->key));
 			return buf;
 		}
 		if (!dir && pi->mask == htonl(0xFFFF0000)) {
 			snprintf(buf, SPRINT_BSIZE-1, "/%d", htonl(pi->key)>>16);
 			return buf;
 		}
 		if (pi->mask == htonl(0xFFFFFFFF)) {
 			snprintf(buf, SPRINT_BSIZE-1, " spi/esp 0x%08x", htonl(pi->key));
 			return buf;
 		}
 	} else if (pi->offset == 4 && pi->mask == htonl(0xFFFFFFFF)) {
 		snprintf(buf, SPRINT_BSIZE-1, " spi/ah 0x%08x", htonl(pi->key));
 		return buf;
 	} else if (pi->offset == -40 && pi->mask == htonl(0x000FFFFF)) {
 		snprintf(buf, SPRINT_BSIZE-1, " flowlabel 0x%05x", htonl(pi->key));
 		return buf;
 	}
 	snprintf(buf, SPRINT_BSIZE-1, " u32 0x%08x mask %08x at %d",
 		 htonl(pi->key), htonl(pi->mask), pi->offset);
 	return buf;
 }

 static int rsvp_print_opt(struct filter_util *qu, FILE *f, struct rtattr *opt, __u32 handle)
 {
 	int family = strcmp(qu->id, "rsvp") == 0 ? AF_INET : AF_INET6;
 	struct rtattr *tb[TCA_RSVP_MAX+1];
 	struct tc_rsvp_pinfo *pinfo = NULL;

 	if (opt == NULL)
 		return 0;

 	parse_rtattr_nested(tb, TCA_RSVP_MAX, opt);

 	if (handle)
 		fprintf(f, "fh 0x%08x ", handle);

 	if (tb[TCA_RSVP_PINFO]) {
 		if (RTA_PAYLOAD(tb[TCA_RSVP_PINFO])  < sizeof(*pinfo))
 			return -1;

 		pinfo = RTA_DATA(tb[TCA_RSVP_PINFO]);
 	}

 	if (tb[TCA_RSVP_CLASSID]) {
 		SPRINT_BUF(b1);
 		if (!pinfo || pinfo->tunnelhdr == 0)
 			fprintf(f, "flowid %s ", sprint_tc_classid(rta_getattr_u32(tb[TCA_RSVP_CLASSID]), b1));
 		else
 			fprintf(f, "tunnel %d skip %d ", rta_getattr_u32(tb[TCA_RSVP_CLASSID]), pinfo->tunnelhdr);
 	} else if (pinfo && pinfo->tunnelhdr)
 		fprintf(f, "tunnel [BAD] skip %d ", pinfo->tunnelhdr);

 	if (tb[TCA_RSVP_DST]) {
 		char buf[128];
 		fprintf(f, "session ");
 		if (inet_ntop(family, RTA_DATA(tb[TCA_RSVP_DST]), buf, sizeof(buf)) == 0)
 			fprintf(f, " [INVALID DADDR] ");
 		else
 			fprintf(f, "%s", buf);
 		if (pinfo && pinfo->dpi.mask) {
 			SPRINT_BUF(b2);
 			fprintf(f, "%s ", sprint_spi(&pinfo->dpi, 1, b2));
 		} else
 			fprintf(f, " ");
 	} else {
 		if (pinfo && pinfo->dpi.mask) {
 			SPRINT_BUF(b2);
 			fprintf(f, "session [NONE]%s ", sprint_spi(&pinfo->dpi, 1, b2));
 		} else
 			fprintf(f, "session NONE ");
 	}

 	if (pinfo && pinfo->protocol) {
 		SPRINT_BUF(b1);
 		fprintf(f, "ipproto %s ", inet_proto_n2a(pinfo->protocol, b1, sizeof(b1)));
 	}
 	if (pinfo && pinfo->tunnelid)
 		fprintf(f, "tunnelid %d ", pinfo->tunnelid);
 	if (tb[TCA_RSVP_SRC]) {
 		char buf[128];
 		fprintf(f, "sender ");
 		if (inet_ntop(family, RTA_DATA(tb[TCA_RSVP_SRC]), buf, sizeof(buf)) == 0) {
 			fprintf(f, "[BAD]");
 		} else {
 			fprintf(f, " %s", buf);
 		}
 		if (pinfo && pinfo->spi.mask) {
 			SPRINT_BUF(b2);
 			fprintf(f, "%s ", sprint_spi(&pinfo->spi, 0, b2));
 		} else
 			fprintf(f, " ");
 	} else if (pinfo && pinfo->spi.mask) {
 		SPRINT_BUF(b2);
 		fprintf(f, "sender [NONE]%s ", sprint_spi(&pinfo->spi, 0, b2));
 	}
 	if (tb[TCA_RSVP_POLICE])
 		tc_print_police(f, tb[TCA_RSVP_POLICE]);
 	return 0;
 }

 struct filter_util rsvp_filter_util = {
 	.id = "rsvp",
 	.parse_fopt = rsvp_parse_opt,
 	.print_fopt = rsvp_print_opt,
 };

 struct filter_util rsvp6_filter_util = {
 	.id = "rsvp6",
 	.parse_fopt = rsvp_parse_opt,
 	.print_fopt = rsvp_print_opt,
 };
	/*
	* q_rsvp.c RSVP filter.
	*
	* 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 <arpa/inet.h>
	#include <string.h>

	#include "rt_names.h"
	#include "utils.h"
	#include "tc_util.h"

	static void explain(void)
	{
	fprintf(stderr, "Usage: ... rsvp ipproto PROTOCOL session DST[/PORT \| GPI ]\n");
	fprintf(stderr, " [ sender SRC[/PORT \| GPI ]\n");
	fprintf(stderr, " [ classid CLASSID ] [ police POLICE_SPEC ]\n");
	fprintf(stderr, " [ tunnelid ID ] [ tunnel ID skip NUMBER ]\n");
	fprintf(stderr, "Where: GPI := { flowlabel NUMBER \| spi/ah SPI \| spi/esp SPI \|\n");
	fprintf(stderr, " u{8\|16\|32} NUMBER mask MASK at OFFSET}\n");
	fprintf(stderr, " POLICE_SPEC := ... look at TBF\n");
	fprintf(stderr, " FILTERID := X:Y\n");
	fprintf(stderr, "\nNOTE: CLASSID is parsed as hexadecimal input.\n");
	}

	static int get_addr_and_pi(int argc_p, char *argv_p, inet_prefix addr,
	struct tc_rsvp_pinfo *pinfo, int dir, int family)
	{
	int argc = *argc_p;
	char *argv = argv_p;
	char p = strchr(argv, '/');
	struct tc_rsvp_gpi *pi = dir ? &pinfo->dpi : &pinfo->spi;

	if (p) {
	__u16 tmp;

	if (get_u16(&tmp, p+1, 0))
	return -1;

	if (dir == 0) {
	/* Source port: u16 at offset 0 */
	pi->key = htonl(((__u32)tmp)<<16);
	pi->mask = htonl(0xFFFF0000);
	} else {
	/* Destination port: u16 at offset 2 */
	pi->key = htonl(((__u32)tmp));
	pi->mask = htonl(0x0000FFFF);
	}
	pi->offset = 0;
	*p = 0;
	}
	if (get_addr_1(addr, *argv, family))
	return -1;
	if (p)
	*p = '/';

	argc--; argv++;

	if (pi->mask \|\| argc <= 0)
	goto done;

	if (strcmp(*argv, "spi/ah") == 0 \|\|
	strcmp(*argv, "gpi/ah") == 0) {
	__u32 gpi;
	NEXT_ARG();
	if (get_u32(&gpi, *argv, 0))
	return -1;
	pi->mask = htonl(0xFFFFFFFF);
	pi->key = htonl(gpi);
	pi->offset = 4;
	if (pinfo->protocol == 0)
	pinfo->protocol = IPPROTO_AH;
	argc--; argv++;
	} else if (strcmp(*argv, "spi/esp") == 0 \|\|
	strcmp(*argv, "gpi/esp") == 0) {
	__u32 gpi;
	NEXT_ARG();
	if (get_u32(&gpi, *argv, 0))
	return -1;
	pi->mask = htonl(0xFFFFFFFF);
	pi->key = htonl(gpi);
	pi->offset = 0;
	if (pinfo->protocol == 0)
	pinfo->protocol = IPPROTO_ESP;
	argc--; argv++;
	} else if (strcmp(*argv, "flowlabel") == 0) {
	__u32 flabel;
	NEXT_ARG();
	if (get_u32(&flabel, *argv, 0))
	return -1;
	if (family != AF_INET6)
	return -1;
	pi->mask = htonl(0x000FFFFF);
	pi->key = htonl(flabel) & pi->mask;
	pi->offset = -40;
	argc--; argv++;
	} else if (strcmp(*argv, "u32") == 0 \|\|
	strcmp(*argv, "u16") == 0 \|\|
	strcmp(*argv, "u8") == 0) {
	int sz = 1;
	__u32 tmp;
	__u32 mask = 0xff;
	if (strcmp(*argv, "u32") == 0) {
	sz = 4;
	mask = 0xffff;
	} else if (strcmp(*argv, "u16") == 0) {
	mask = 0xffffffff;
	sz = 2;
	}
	NEXT_ARG();
	if (get_u32(&tmp, *argv, 0))
	return -1;
	argc--; argv++;
	if (strcmp(*argv, "mask") == 0) {
	NEXT_ARG();
	if (get_u32(&mask, *argv, 16))
	return -1;
	argc--; argv++;
	}
	if (strcmp(*argv, "at") == 0) {
	NEXT_ARG();
	if (get_integer(&pi->offset, *argv, 0))
	return -1;
	argc--; argv++;
	}
	if (sz == 1) {
	if ((pi->offset & 3) == 0) {
	mask <<= 24;
	tmp <<= 24;
	} else if ((pi->offset & 3) == 1) {
	mask <<= 16;
	tmp <<= 16;
	} else if ((pi->offset & 3) == 3) {
	mask <<= 8;
	tmp <<= 8;
	}
	} else if (sz == 2) {
	if ((pi->offset & 3) == 0) {
	mask <<= 16;
	tmp <<= 16;
	}
	}
	pi->offset &= ~3;
	pi->mask = htonl(mask);
	pi->key = htonl(tmp) & pi->mask;
	}

	done:
	*argc_p = argc;
	*argv_p = argv;
	return 0;
	}


	static int rsvp_parse_opt(struct filter_util qu, char handle, int argc, char *argv, struct nlmsghdr n)
	{
	int family = strcmp(qu->id, "rsvp") == 0 ? AF_INET : AF_INET6;
	struct tc_rsvp_pinfo pinfo;
	struct tc_police tp;
	struct tcmsg *t = NLMSG_DATA(n);
	int pinfo_ok = 0;
	struct rtattr *tail;

	memset(&pinfo, 0, sizeof(pinfo));
	memset(&tp, 0, sizeof(tp));

	if (handle) {
	if (get_u32(&t->tcm_handle, handle, 0)) {
	fprintf(stderr, "Illegal \"handle\"\n");
	return -1;
	}
	}

	if (argc == 0)
	return 0;

	tail = NLMSG_TAIL(n);
	addattr_l(n, 4096, TCA_OPTIONS, NULL, 0);

	while (argc > 0) {
	if (matches(*argv, "session") == 0) {
	inet_prefix addr;
	NEXT_ARG();
	if (get_addr_and_pi(&argc, &argv, &addr, &pinfo, 1, family)) {
	fprintf(stderr, "Illegal \"session\"\n");
	return -1;
	}
	addattr_l(n, 4096, TCA_RSVP_DST, &addr.data, addr.bytelen);
	if (pinfo.dpi.mask \|\| pinfo.protocol)
	pinfo_ok++;
	continue;
	} else if (matches(*argv, "sender") == 0 \|\|
	matches(*argv, "flowspec") == 0) {
	inet_prefix addr;
	NEXT_ARG();
	if (get_addr_and_pi(&argc, &argv, &addr, &pinfo, 0, family)) {
	fprintf(stderr, "Illegal \"sender\"\n");
	return -1;
	}
	addattr_l(n, 4096, TCA_RSVP_SRC, &addr.data, addr.bytelen);
	if (pinfo.spi.mask \|\| pinfo.protocol)
	pinfo_ok++;
	continue;
	} else if (matches("ipproto", *argv) == 0) {
	int num;
	NEXT_ARG();
	num = inet_proto_a2n(*argv);
	if (num < 0) {
	fprintf(stderr, "Illegal \"ipproto\"\n");
	return -1;
	}
	pinfo.protocol = num;
	pinfo_ok++;
	} else if (matches(*argv, "classid") == 0 \|\|
	strcmp(*argv, "flowid") == 0) {
	unsigned handle;
	NEXT_ARG();
	if (get_tc_classid(&handle, *argv)) {
	fprintf(stderr, "Illegal \"classid\"\n");
	return -1;
	}
	addattr_l(n, 4096, TCA_RSVP_CLASSID, &handle, 4);
	} else if (strcmp(*argv, "tunnelid") == 0) {
	unsigned tid;
	NEXT_ARG();
	if (get_unsigned(&tid, *argv, 0)) {
	fprintf(stderr, "Illegal \"tunnelid\"\n");
	return -1;
	}
	pinfo.tunnelid = tid;
	pinfo_ok++;
	} else if (strcmp(*argv, "tunnel") == 0) {
	unsigned tid;
	NEXT_ARG();
	if (get_unsigned(&tid, *argv, 0)) {
	fprintf(stderr, "Illegal \"tunnel\"\n");
	return -1;
	}
	addattr_l(n, 4096, TCA_RSVP_CLASSID, &tid, 4);
	NEXT_ARG();
	if (strcmp(*argv, "skip") == 0) {
	NEXT_ARG();
	}
	if (get_unsigned(&tid, *argv, 0)) {
	fprintf(stderr, "Illegal \"skip\"\n");
	return -1;
	}
	pinfo.tunnelhdr = tid;
	pinfo_ok++;
	} else if (matches(*argv, "police") == 0) {
	NEXT_ARG();
	if (parse_police(&argc, &argv, TCA_RSVP_POLICE, n)) {
	fprintf(stderr, "Illegal \"police\"\n");
	return -1;
	}
	continue;
	} else if (strcmp(*argv, "help") == 0) {
	explain();
	return -1;
	} else {
	fprintf(stderr, "What is \"%s\"?\n", *argv);
	explain();
	return -1;
	}
	argc--; argv++;
	}

	if (pinfo_ok)
	addattr_l(n, 4096, TCA_RSVP_PINFO, &pinfo, sizeof(pinfo));
	tail->rta_len = (void ) NLMSG_TAIL(n) - (void ) tail;
	return 0;
	}

	static char * sprint_spi(struct tc_rsvp_gpi pi, int dir, char buf)
	{
	if (pi->offset == 0) {
	if (dir && pi->mask == htonl(0xFFFF)) {
	snprintf(buf, SPRINT_BSIZE-1, "/%d", htonl(pi->key));
	return buf;
	}
	if (!dir && pi->mask == htonl(0xFFFF0000)) {
	snprintf(buf, SPRINT_BSIZE-1, "/%d", htonl(pi->key)>>16);
	return buf;
	}
	if (pi->mask == htonl(0xFFFFFFFF)) {
	snprintf(buf, SPRINT_BSIZE-1, " spi/esp 0x%08x", htonl(pi->key));
	return buf;
	}
	} else if (pi->offset == 4 && pi->mask == htonl(0xFFFFFFFF)) {
	snprintf(buf, SPRINT_BSIZE-1, " spi/ah 0x%08x", htonl(pi->key));
	return buf;
	} else if (pi->offset == -40 && pi->mask == htonl(0x000FFFFF)) {
	snprintf(buf, SPRINT_BSIZE-1, " flowlabel 0x%05x", htonl(pi->key));
	return buf;
	}
	snprintf(buf, SPRINT_BSIZE-1, " u32 0x%08x mask %08x at %d",
	htonl(pi->key), htonl(pi->mask), pi->offset);
	return buf;
	}

	static int rsvp_print_opt(struct filter_util qu, FILE f, struct rtattr *opt, __u32 handle)
	{
	int family = strcmp(qu->id, "rsvp") == 0 ? AF_INET : AF_INET6;
	struct rtattr *tb[TCA_RSVP_MAX+1];
	struct tc_rsvp_pinfo *pinfo = NULL;

	if (opt == NULL)
	return 0;

	parse_rtattr_nested(tb, TCA_RSVP_MAX, opt);

	if (handle)
	fprintf(f, "fh 0x%08x ", handle);

	if (tb[TCA_RSVP_PINFO]) {
	if (RTA_PAYLOAD(tb[TCA_RSVP_PINFO]) < sizeof(*pinfo))
	return -1;

	pinfo = RTA_DATA(tb[TCA_RSVP_PINFO]);
	}

	if (tb[TCA_RSVP_CLASSID]) {
	SPRINT_BUF(b1);
	if (!pinfo \|\| pinfo->tunnelhdr == 0)
	fprintf(f, "flowid %s ", sprint_tc_classid(rta_getattr_u32(tb[TCA_RSVP_CLASSID]), b1));
	else
	fprintf(f, "tunnel %d skip %d ", rta_getattr_u32(tb[TCA_RSVP_CLASSID]), pinfo->tunnelhdr);
	} else if (pinfo && pinfo->tunnelhdr)
	fprintf(f, "tunnel [BAD] skip %d ", pinfo->tunnelhdr);

	if (tb[TCA_RSVP_DST]) {
	char buf[128];
	fprintf(f, "session ");
	if (inet_ntop(family, RTA_DATA(tb[TCA_RSVP_DST]), buf, sizeof(buf)) == 0)
	fprintf(f, " [INVALID DADDR] ");
	else
	fprintf(f, "%s", buf);
	if (pinfo && pinfo->dpi.mask) {
	SPRINT_BUF(b2);
	fprintf(f, "%s ", sprint_spi(&pinfo->dpi, 1, b2));
	} else
	fprintf(f, " ");
	} else {
	if (pinfo && pinfo->dpi.mask) {
	SPRINT_BUF(b2);
	fprintf(f, "session [NONE]%s ", sprint_spi(&pinfo->dpi, 1, b2));
	} else
	fprintf(f, "session NONE ");
	}

	if (pinfo && pinfo->protocol) {
	SPRINT_BUF(b1);
	fprintf(f, "ipproto %s ", inet_proto_n2a(pinfo->protocol, b1, sizeof(b1)));
	}
	if (pinfo && pinfo->tunnelid)
	fprintf(f, "tunnelid %d ", pinfo->tunnelid);
	if (tb[TCA_RSVP_SRC]) {
	char buf[128];
	fprintf(f, "sender ");
	if (inet_ntop(family, RTA_DATA(tb[TCA_RSVP_SRC]), buf, sizeof(buf)) == 0) {
	fprintf(f, "[BAD]");
	} else {
	fprintf(f, " %s", buf);
	}
	if (pinfo && pinfo->spi.mask) {
	SPRINT_BUF(b2);
	fprintf(f, "%s ", sprint_spi(&pinfo->spi, 0, b2));
	} else
	fprintf(f, " ");
	} else if (pinfo && pinfo->spi.mask) {
	SPRINT_BUF(b2);
	fprintf(f, "sender [NONE]%s ", sprint_spi(&pinfo->spi, 0, b2));
	}
	if (tb[TCA_RSVP_POLICE])
	tc_print_police(f, tb[TCA_RSVP_POLICE]);
	return 0;
	}

	struct filter_util rsvp_filter_util = {
	.id = "rsvp",
	.parse_fopt = rsvp_parse_opt,
	.print_fopt = rsvp_print_opt,
	};

	struct filter_util rsvp6_filter_util = {
	.id = "rsvp6",
	.parse_fopt = rsvp_parse_opt,
	.print_fopt = rsvp_print_opt,
	};