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1184 lines
29 KiB
1184 lines
29 KiB
/* $USAGI: $ */
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/*
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* Copyright (C)2004 USAGI/WIDE Project
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses>.
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*/
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/*
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* based on iproute.c
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*/
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/*
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* Authors:
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* Masahide NAKAMURA @USAGI
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <netdb.h>
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#include <linux/netlink.h>
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#include "utils.h"
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#include "xfrm.h"
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#include "ip_common.h"
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/* #define NLMSG_DELETEALL_BUF_SIZE (4096-512) */
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#define NLMSG_DELETEALL_BUF_SIZE 8192
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/*
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* Receiving buffer defines:
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* nlmsg
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* data = struct xfrm_userpolicy_info
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* rtattr
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* data = struct xfrm_user_tmpl[]
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*/
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#define NLMSG_BUF_SIZE 4096
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#define RTA_BUF_SIZE 2048
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#define XFRM_TMPLS_BUF_SIZE 1024
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#define CTX_BUF_SIZE 256
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static void usage(void) __attribute__((noreturn));
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static void usage(void)
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{
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fprintf(stderr, "Usage: ip xfrm policy { add | update } SELECTOR dir DIR [ ctx CTX ]\n");
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fprintf(stderr, " [ mark MARK [ mask MASK ] ] [ index INDEX ] [ ptype PTYPE ]\n");
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fprintf(stderr, " [ action ACTION ] [ priority PRIORITY ] [ flag FLAG-LIST ]\n");
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fprintf(stderr, " [ LIMIT-LIST ] [ TMPL-LIST ]\n");
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fprintf(stderr, "Usage: ip xfrm policy { delete | get } { SELECTOR | index INDEX } dir DIR\n");
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fprintf(stderr, " [ ctx CTX ] [ mark MARK [ mask MASK ] ] [ ptype PTYPE ]\n");
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fprintf(stderr, "Usage: ip xfrm policy { deleteall | list } [ nosock ] [ SELECTOR ] [ dir DIR ]\n");
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fprintf(stderr, " [ index INDEX ] [ ptype PTYPE ] [ action ACTION ] [ priority PRIORITY ]\n");
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fprintf(stderr, " [ flag FLAG-LIST ]\n");
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fprintf(stderr, "Usage: ip xfrm policy flush [ ptype PTYPE ]\n");
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fprintf(stderr, "Usage: ip xfrm policy count\n");
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fprintf(stderr, "Usage: ip xfrm policy set [ hthresh4 LBITS RBITS ] [ hthresh6 LBITS RBITS ]\n");
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fprintf(stderr, "SELECTOR := [ src ADDR[/PLEN] ] [ dst ADDR[/PLEN] ] [ dev DEV ] [ UPSPEC ]\n");
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fprintf(stderr, "UPSPEC := proto { { ");
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fprintf(stderr, "%s | ", strxf_proto(IPPROTO_TCP));
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fprintf(stderr, "%s | ", strxf_proto(IPPROTO_UDP));
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fprintf(stderr, "%s | ", strxf_proto(IPPROTO_SCTP));
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fprintf(stderr, "%s", strxf_proto(IPPROTO_DCCP));
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fprintf(stderr, " } [ sport PORT ] [ dport PORT ] |\n");
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fprintf(stderr, " { ");
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fprintf(stderr, "%s | ", strxf_proto(IPPROTO_ICMP));
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fprintf(stderr, "%s | ", strxf_proto(IPPROTO_ICMPV6));
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fprintf(stderr, "%s", strxf_proto(IPPROTO_MH));
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fprintf(stderr, " } [ type NUMBER ] [ code NUMBER ] |\n");
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fprintf(stderr, " %s", strxf_proto(IPPROTO_GRE));
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fprintf(stderr, " [ key { DOTTED-QUAD | NUMBER } ] | PROTO }\n");
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fprintf(stderr, "DIR := in | out | fwd\n");
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fprintf(stderr, "PTYPE := main | sub\n");
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fprintf(stderr, "ACTION := allow | block\n");
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fprintf(stderr, "FLAG-LIST := [ FLAG-LIST ] FLAG\n");
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fprintf(stderr, "FLAG := localok | icmp\n");
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fprintf(stderr, "LIMIT-LIST := [ LIMIT-LIST ] limit LIMIT\n");
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fprintf(stderr, "LIMIT := { time-soft | time-hard | time-use-soft | time-use-hard } SECONDS |\n");
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fprintf(stderr, " { byte-soft | byte-hard } SIZE | { packet-soft | packet-hard } COUNT\n");
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fprintf(stderr, "TMPL-LIST := [ TMPL-LIST ] tmpl TMPL\n");
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fprintf(stderr, "TMPL := ID [ mode MODE ] [ reqid REQID ] [ level LEVEL ]\n");
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fprintf(stderr, "ID := [ src ADDR ] [ dst ADDR ] [ proto XFRM-PROTO ] [ spi SPI ]\n");
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fprintf(stderr, "XFRM-PROTO := ");
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fprintf(stderr, "%s | ", strxf_xfrmproto(IPPROTO_ESP));
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fprintf(stderr, "%s | ", strxf_xfrmproto(IPPROTO_AH));
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fprintf(stderr, "%s | ", strxf_xfrmproto(IPPROTO_COMP));
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fprintf(stderr, "%s | ", strxf_xfrmproto(IPPROTO_ROUTING));
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fprintf(stderr, "%s\n", strxf_xfrmproto(IPPROTO_DSTOPTS));
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fprintf(stderr, "MODE := transport | tunnel | beet | ro | in_trigger\n");
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fprintf(stderr, "LEVEL := required | use\n");
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exit(-1);
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}
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static int xfrm_policy_dir_parse(__u8 *dir, int *argcp, char ***argvp)
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{
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int argc = *argcp;
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char **argv = *argvp;
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if (strcmp(*argv, "in") == 0)
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*dir = XFRM_POLICY_IN;
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else if (strcmp(*argv, "out") == 0)
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*dir = XFRM_POLICY_OUT;
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else if (strcmp(*argv, "fwd") == 0)
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*dir = XFRM_POLICY_FWD;
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else
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invarg("DIR value is invalid", *argv);
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*argcp = argc;
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*argvp = argv;
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return 0;
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}
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static int xfrm_policy_ptype_parse(__u8 *ptype, int *argcp, char ***argvp)
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{
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int argc = *argcp;
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char **argv = *argvp;
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if (strcmp(*argv, "main") == 0)
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*ptype = XFRM_POLICY_TYPE_MAIN;
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else if (strcmp(*argv, "sub") == 0)
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*ptype = XFRM_POLICY_TYPE_SUB;
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else
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invarg("PTYPE value is invalid", *argv);
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*argcp = argc;
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*argvp = argv;
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return 0;
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}
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static int xfrm_policy_flag_parse(__u8 *flags, int *argcp, char ***argvp)
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{
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int argc = *argcp;
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char **argv = *argvp;
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int len = strlen(*argv);
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if (len > 2 && strncmp(*argv, "0x", 2) == 0) {
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__u8 val = 0;
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if (get_u8(&val, *argv, 16))
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invarg("FLAG value is invalid", *argv);
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*flags = val;
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} else {
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while (1) {
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if (strcmp(*argv, "localok") == 0)
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*flags |= XFRM_POLICY_LOCALOK;
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else if (strcmp(*argv, "icmp") == 0)
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*flags |= XFRM_POLICY_ICMP;
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else {
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PREV_ARG(); /* back track */
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break;
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}
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if (!NEXT_ARG_OK())
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break;
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NEXT_ARG();
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}
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}
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*argcp = argc;
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*argvp = argv;
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return 0;
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}
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static int xfrm_tmpl_parse(struct xfrm_user_tmpl *tmpl,
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int *argcp, char ***argvp)
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{
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int argc = *argcp;
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char **argv = *argvp;
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char *idp = NULL;
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while (1) {
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if (strcmp(*argv, "mode") == 0) {
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NEXT_ARG();
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xfrm_mode_parse(&tmpl->mode, &argc, &argv);
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} else if (strcmp(*argv, "reqid") == 0) {
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NEXT_ARG();
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xfrm_reqid_parse(&tmpl->reqid, &argc, &argv);
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} else if (strcmp(*argv, "level") == 0) {
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NEXT_ARG();
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if (strcmp(*argv, "required") == 0)
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tmpl->optional = 0;
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else if (strcmp(*argv, "use") == 0)
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tmpl->optional = 1;
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else
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invarg("LEVEL value is invalid\n", *argv);
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} else {
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if (idp) {
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PREV_ARG(); /* back track */
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break;
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}
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idp = *argv;
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preferred_family = AF_UNSPEC;
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xfrm_id_parse(&tmpl->saddr, &tmpl->id, &tmpl->family,
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0, &argc, &argv);
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preferred_family = tmpl->family;
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}
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if (!NEXT_ARG_OK())
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break;
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NEXT_ARG();
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}
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if (argc == *argcp)
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missarg("TMPL");
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*argcp = argc;
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*argvp = argv;
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return 0;
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}
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int xfrm_sctx_parse(char *ctxstr, char *s,
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struct xfrm_user_sec_ctx *sctx)
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{
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int slen;
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slen = strlen(s) + 1;
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sctx->exttype = XFRMA_SEC_CTX;
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sctx->ctx_doi = 1;
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sctx->ctx_alg = 1;
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sctx->ctx_len = slen;
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sctx->len = sizeof(struct xfrm_user_sec_ctx) + slen;
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memcpy(ctxstr, s, slen);
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return 0;
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}
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static int xfrm_policy_modify(int cmd, unsigned int flags, int argc, char **argv)
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{
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struct rtnl_handle rth;
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struct {
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struct nlmsghdr n;
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struct xfrm_userpolicy_info xpinfo;
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char buf[RTA_BUF_SIZE];
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} req = {
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.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xpinfo)),
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.n.nlmsg_flags = NLM_F_REQUEST | flags,
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.n.nlmsg_type = cmd,
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.xpinfo.sel.family = preferred_family,
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.xpinfo.lft.soft_byte_limit = XFRM_INF,
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.xpinfo.lft.hard_byte_limit = XFRM_INF,
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.xpinfo.lft.soft_packet_limit = XFRM_INF,
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.xpinfo.lft.hard_packet_limit = XFRM_INF,
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};
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char *dirp = NULL;
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char *selp = NULL;
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char *ptypep = NULL;
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char *sctxp = NULL;
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struct xfrm_userpolicy_type upt = {};
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char tmpls_buf[XFRM_TMPLS_BUF_SIZE] = {};
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int tmpls_len = 0;
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struct xfrm_mark mark = {0, 0};
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struct {
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struct xfrm_user_sec_ctx sctx;
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char str[CTX_BUF_SIZE];
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} ctx = {};
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while (argc > 0) {
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if (strcmp(*argv, "dir") == 0) {
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if (dirp)
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duparg("dir", *argv);
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dirp = *argv;
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NEXT_ARG();
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xfrm_policy_dir_parse(&req.xpinfo.dir, &argc, &argv);
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} else if (strcmp(*argv, "ctx") == 0) {
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char *context;
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if (sctxp)
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duparg("ctx", *argv);
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sctxp = *argv;
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NEXT_ARG();
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context = *argv;
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xfrm_sctx_parse((char *)&ctx.str, context, &ctx.sctx);
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} else if (strcmp(*argv, "mark") == 0) {
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xfrm_parse_mark(&mark, &argc, &argv);
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} else if (strcmp(*argv, "index") == 0) {
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NEXT_ARG();
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if (get_u32(&req.xpinfo.index, *argv, 0))
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invarg("INDEX value is invalid", *argv);
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} else if (strcmp(*argv, "ptype") == 0) {
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if (ptypep)
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duparg("ptype", *argv);
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ptypep = *argv;
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NEXT_ARG();
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xfrm_policy_ptype_parse(&upt.type, &argc, &argv);
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} else if (strcmp(*argv, "action") == 0) {
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NEXT_ARG();
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if (strcmp(*argv, "allow") == 0)
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req.xpinfo.action = XFRM_POLICY_ALLOW;
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else if (strcmp(*argv, "block") == 0)
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req.xpinfo.action = XFRM_POLICY_BLOCK;
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else
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invarg("ACTION value is invalid\n", *argv);
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} else if (strcmp(*argv, "priority") == 0) {
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NEXT_ARG();
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if (get_u32(&req.xpinfo.priority, *argv, 0))
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invarg("PRIORITY value is invalid", *argv);
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} else if (strcmp(*argv, "flag") == 0) {
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NEXT_ARG();
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xfrm_policy_flag_parse(&req.xpinfo.flags, &argc,
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&argv);
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} else if (strcmp(*argv, "limit") == 0) {
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NEXT_ARG();
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xfrm_lifetime_cfg_parse(&req.xpinfo.lft, &argc, &argv);
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} else if (strcmp(*argv, "tmpl") == 0) {
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struct xfrm_user_tmpl *tmpl;
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if (tmpls_len + sizeof(*tmpl) > sizeof(tmpls_buf)) {
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fprintf(stderr, "Too many tmpls: buffer overflow\n");
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exit(1);
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}
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tmpl = (struct xfrm_user_tmpl *)((char *)tmpls_buf + tmpls_len);
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tmpl->family = preferred_family;
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tmpl->aalgos = (~(__u32)0);
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tmpl->ealgos = (~(__u32)0);
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tmpl->calgos = (~(__u32)0);
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NEXT_ARG();
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xfrm_tmpl_parse(tmpl, &argc, &argv);
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tmpls_len += sizeof(*tmpl);
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} else {
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if (selp)
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duparg("unknown", *argv);
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selp = *argv;
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xfrm_selector_parse(&req.xpinfo.sel, &argc, &argv);
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if (preferred_family == AF_UNSPEC)
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preferred_family = req.xpinfo.sel.family;
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}
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argc--; argv++;
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}
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if (!dirp) {
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fprintf(stderr, "Not enough information: DIR is required.\n");
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exit(1);
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}
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if (ptypep) {
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addattr_l(&req.n, sizeof(req), XFRMA_POLICY_TYPE,
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(void *)&upt, sizeof(upt));
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}
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if (tmpls_len > 0) {
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addattr_l(&req.n, sizeof(req), XFRMA_TMPL,
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(void *)tmpls_buf, tmpls_len);
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}
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if (mark.m) {
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int r = addattr_l(&req.n, sizeof(req.buf), XFRMA_MARK,
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(void *)&mark, sizeof(mark));
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if (r < 0) {
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fprintf(stderr, "%s: XFRMA_MARK failed\n", __func__);
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exit(1);
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}
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}
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if (sctxp) {
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addattr_l(&req.n, sizeof(req), XFRMA_SEC_CTX,
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(void *)&ctx, ctx.sctx.len);
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}
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if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
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exit(1);
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if (req.xpinfo.sel.family == AF_UNSPEC)
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req.xpinfo.sel.family = AF_INET;
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if (rtnl_talk(&rth, &req.n, NULL, 0) < 0)
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exit(2);
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rtnl_close(&rth);
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return 0;
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}
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static int xfrm_policy_filter_match(struct xfrm_userpolicy_info *xpinfo,
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__u8 ptype)
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{
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if (!filter.use)
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return 1;
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if ((xpinfo->dir^filter.xpinfo.dir)&filter.dir_mask)
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return 0;
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if (filter.filter_socket && (xpinfo->dir >= XFRM_POLICY_MAX))
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return 0;
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if ((ptype^filter.ptype)&filter.ptype_mask)
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return 0;
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if (filter.sel_src_mask) {
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if (xfrm_addr_match(&xpinfo->sel.saddr, &filter.xpinfo.sel.saddr,
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filter.sel_src_mask))
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return 0;
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}
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if (filter.sel_dst_mask) {
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if (xfrm_addr_match(&xpinfo->sel.daddr, &filter.xpinfo.sel.daddr,
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filter.sel_dst_mask))
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return 0;
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}
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if ((xpinfo->sel.ifindex^filter.xpinfo.sel.ifindex)&filter.sel_dev_mask)
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return 0;
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if ((xpinfo->sel.proto^filter.xpinfo.sel.proto)&filter.upspec_proto_mask)
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return 0;
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if (filter.upspec_sport_mask) {
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if ((xpinfo->sel.sport^filter.xpinfo.sel.sport)&filter.upspec_sport_mask)
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return 0;
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}
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if (filter.upspec_dport_mask) {
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if ((xpinfo->sel.dport^filter.xpinfo.sel.dport)&filter.upspec_dport_mask)
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return 0;
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}
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if ((xpinfo->index^filter.xpinfo.index)&filter.index_mask)
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return 0;
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if ((xpinfo->action^filter.xpinfo.action)&filter.action_mask)
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return 0;
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if ((xpinfo->priority^filter.xpinfo.priority)&filter.priority_mask)
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return 0;
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if (filter.policy_flags_mask)
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if ((xpinfo->flags & filter.xpinfo.flags) == 0)
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return 0;
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return 1;
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}
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int xfrm_policy_print(const struct sockaddr_nl *who, struct nlmsghdr *n,
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void *arg)
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{
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struct rtattr *tb[XFRMA_MAX+1];
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struct rtattr *rta;
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struct xfrm_userpolicy_info *xpinfo = NULL;
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struct xfrm_user_polexpire *xpexp = NULL;
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struct xfrm_userpolicy_id *xpid = NULL;
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__u8 ptype = XFRM_POLICY_TYPE_MAIN;
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FILE *fp = (FILE *)arg;
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int len = n->nlmsg_len;
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if (n->nlmsg_type != XFRM_MSG_NEWPOLICY &&
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n->nlmsg_type != XFRM_MSG_DELPOLICY &&
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n->nlmsg_type != XFRM_MSG_UPDPOLICY &&
|
|
n->nlmsg_type != XFRM_MSG_POLEXPIRE) {
|
|
fprintf(stderr, "Not a policy: %08x %08x %08x\n",
|
|
n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
|
|
return 0;
|
|
}
|
|
|
|
if (n->nlmsg_type == XFRM_MSG_DELPOLICY) {
|
|
xpid = NLMSG_DATA(n);
|
|
len -= NLMSG_SPACE(sizeof(*xpid));
|
|
} else if (n->nlmsg_type == XFRM_MSG_POLEXPIRE) {
|
|
xpexp = NLMSG_DATA(n);
|
|
xpinfo = &xpexp->pol;
|
|
len -= NLMSG_SPACE(sizeof(*xpexp));
|
|
} else {
|
|
xpexp = NULL;
|
|
xpinfo = NLMSG_DATA(n);
|
|
len -= NLMSG_SPACE(sizeof(*xpinfo));
|
|
}
|
|
|
|
if (len < 0) {
|
|
fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
|
|
return -1;
|
|
}
|
|
|
|
if (n->nlmsg_type == XFRM_MSG_DELPOLICY)
|
|
rta = XFRMPID_RTA(xpid);
|
|
else if (n->nlmsg_type == XFRM_MSG_POLEXPIRE)
|
|
rta = XFRMPEXP_RTA(xpexp);
|
|
else
|
|
rta = XFRMP_RTA(xpinfo);
|
|
|
|
parse_rtattr(tb, XFRMA_MAX, rta, len);
|
|
|
|
if (tb[XFRMA_POLICY_TYPE]) {
|
|
struct xfrm_userpolicy_type *upt;
|
|
|
|
if (RTA_PAYLOAD(tb[XFRMA_POLICY_TYPE]) < sizeof(*upt)) {
|
|
fprintf(stderr, "too short XFRMA_POLICY_TYPE len\n");
|
|
return -1;
|
|
}
|
|
upt = RTA_DATA(tb[XFRMA_POLICY_TYPE]);
|
|
ptype = upt->type;
|
|
}
|
|
|
|
if (xpinfo && !xfrm_policy_filter_match(xpinfo, ptype))
|
|
return 0;
|
|
|
|
if (n->nlmsg_type == XFRM_MSG_DELPOLICY)
|
|
fprintf(fp, "Deleted ");
|
|
else if (n->nlmsg_type == XFRM_MSG_UPDPOLICY)
|
|
fprintf(fp, "Updated ");
|
|
else if (n->nlmsg_type == XFRM_MSG_POLEXPIRE)
|
|
fprintf(fp, "Expired ");
|
|
|
|
if (n->nlmsg_type == XFRM_MSG_DELPOLICY) {
|
|
/* xfrm_policy_id_print(); */
|
|
if (!tb[XFRMA_POLICY]) {
|
|
fprintf(stderr, "Buggy XFRM_MSG_DELPOLICY: no XFRMA_POLICY\n");
|
|
return -1;
|
|
}
|
|
if (RTA_PAYLOAD(tb[XFRMA_POLICY]) < sizeof(*xpinfo)) {
|
|
fprintf(stderr, "Buggy XFRM_MSG_DELPOLICY: too short XFRMA_POLICY len\n");
|
|
return -1;
|
|
}
|
|
xpinfo = RTA_DATA(tb[XFRMA_POLICY]);
|
|
}
|
|
|
|
xfrm_policy_info_print(xpinfo, tb, fp, NULL, NULL);
|
|
|
|
if (n->nlmsg_type == XFRM_MSG_POLEXPIRE) {
|
|
fprintf(fp, "\t");
|
|
fprintf(fp, "hard %u", xpexp->hard);
|
|
fprintf(fp, "%s", _SL_);
|
|
}
|
|
|
|
if (oneline)
|
|
fprintf(fp, "\n");
|
|
fflush(fp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xfrm_policy_get_or_delete(int argc, char **argv, int delete,
|
|
void *res_nlbuf, size_t res_size)
|
|
{
|
|
struct rtnl_handle rth;
|
|
struct {
|
|
struct nlmsghdr n;
|
|
struct xfrm_userpolicy_id xpid;
|
|
char buf[RTA_BUF_SIZE];
|
|
} req = {
|
|
.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xpid)),
|
|
.n.nlmsg_flags = NLM_F_REQUEST,
|
|
.n.nlmsg_type = delete ? XFRM_MSG_DELPOLICY
|
|
: XFRM_MSG_GETPOLICY,
|
|
};
|
|
char *dirp = NULL;
|
|
char *selp = NULL;
|
|
char *indexp = NULL;
|
|
char *ptypep = NULL;
|
|
char *sctxp = NULL;
|
|
struct xfrm_userpolicy_type upt = {};
|
|
struct xfrm_mark mark = {0, 0};
|
|
struct {
|
|
struct xfrm_user_sec_ctx sctx;
|
|
char str[CTX_BUF_SIZE];
|
|
} ctx = {};
|
|
|
|
while (argc > 0) {
|
|
if (strcmp(*argv, "dir") == 0) {
|
|
if (dirp)
|
|
duparg("dir", *argv);
|
|
dirp = *argv;
|
|
|
|
NEXT_ARG();
|
|
xfrm_policy_dir_parse(&req.xpid.dir, &argc, &argv);
|
|
|
|
} else if (strcmp(*argv, "ctx") == 0) {
|
|
char *context;
|
|
|
|
if (sctxp)
|
|
duparg("ctx", *argv);
|
|
sctxp = *argv;
|
|
NEXT_ARG();
|
|
context = *argv;
|
|
xfrm_sctx_parse((char *)&ctx.str, context, &ctx.sctx);
|
|
} else if (strcmp(*argv, "mark") == 0) {
|
|
xfrm_parse_mark(&mark, &argc, &argv);
|
|
} else if (strcmp(*argv, "index") == 0) {
|
|
if (indexp)
|
|
duparg("index", *argv);
|
|
indexp = *argv;
|
|
|
|
NEXT_ARG();
|
|
if (get_u32(&req.xpid.index, *argv, 0))
|
|
invarg("INDEX value is invalid", *argv);
|
|
|
|
} else if (strcmp(*argv, "ptype") == 0) {
|
|
if (ptypep)
|
|
duparg("ptype", *argv);
|
|
ptypep = *argv;
|
|
|
|
NEXT_ARG();
|
|
xfrm_policy_ptype_parse(&upt.type, &argc, &argv);
|
|
|
|
} else {
|
|
if (selp)
|
|
invarg("unknown", *argv);
|
|
selp = *argv;
|
|
|
|
xfrm_selector_parse(&req.xpid.sel, &argc, &argv);
|
|
if (preferred_family == AF_UNSPEC)
|
|
preferred_family = req.xpid.sel.family;
|
|
|
|
}
|
|
|
|
argc--; argv++;
|
|
}
|
|
|
|
if (!dirp) {
|
|
fprintf(stderr, "Not enough information: DIR is required.\n");
|
|
exit(1);
|
|
}
|
|
if (ptypep) {
|
|
addattr_l(&req.n, sizeof(req), XFRMA_POLICY_TYPE,
|
|
(void *)&upt, sizeof(upt));
|
|
}
|
|
if (!selp && !indexp) {
|
|
fprintf(stderr, "Not enough information: either SELECTOR or INDEX is required.\n");
|
|
exit(1);
|
|
}
|
|
if (selp && indexp)
|
|
duparg2("SELECTOR", "INDEX");
|
|
|
|
if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
|
|
exit(1);
|
|
|
|
if (req.xpid.sel.family == AF_UNSPEC)
|
|
req.xpid.sel.family = AF_INET;
|
|
|
|
if (mark.m & mark.v) {
|
|
int r = addattr_l(&req.n, sizeof(req.buf), XFRMA_MARK,
|
|
(void *)&mark, sizeof(mark));
|
|
if (r < 0) {
|
|
fprintf(stderr, "%s: XFRMA_MARK failed\n", __func__);
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
if (sctxp) {
|
|
addattr_l(&req.n, sizeof(req), XFRMA_SEC_CTX,
|
|
(void *)&ctx, ctx.sctx.len);
|
|
}
|
|
|
|
if (rtnl_talk(&rth, &req.n, res_nlbuf, res_size) < 0)
|
|
exit(2);
|
|
|
|
rtnl_close(&rth);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xfrm_policy_delete(int argc, char **argv)
|
|
{
|
|
return xfrm_policy_get_or_delete(argc, argv, 1, NULL, 0);
|
|
}
|
|
|
|
static int xfrm_policy_get(int argc, char **argv)
|
|
{
|
|
char buf[NLMSG_BUF_SIZE] = {};
|
|
struct nlmsghdr *n = (struct nlmsghdr *)buf;
|
|
|
|
xfrm_policy_get_or_delete(argc, argv, 0, n, sizeof(buf));
|
|
|
|
if (xfrm_policy_print(NULL, n, (void *)stdout) < 0) {
|
|
fprintf(stderr, "An error :-)\n");
|
|
exit(1);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* With an existing policy of nlmsg, make new nlmsg for deleting the policy
|
|
* and store it to buffer.
|
|
*/
|
|
static int xfrm_policy_keep(const struct sockaddr_nl *who,
|
|
struct nlmsghdr *n,
|
|
void *arg)
|
|
{
|
|
struct xfrm_buffer *xb = (struct xfrm_buffer *)arg;
|
|
struct rtnl_handle *rth = xb->rth;
|
|
struct xfrm_userpolicy_info *xpinfo = NLMSG_DATA(n);
|
|
int len = n->nlmsg_len;
|
|
struct rtattr *tb[XFRMA_MAX+1];
|
|
__u8 ptype = XFRM_POLICY_TYPE_MAIN;
|
|
struct nlmsghdr *new_n;
|
|
struct xfrm_userpolicy_id *xpid;
|
|
|
|
if (n->nlmsg_type != XFRM_MSG_NEWPOLICY) {
|
|
fprintf(stderr, "Not a policy: %08x %08x %08x\n",
|
|
n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
|
|
return 0;
|
|
}
|
|
|
|
len -= NLMSG_LENGTH(sizeof(*xpinfo));
|
|
if (len < 0) {
|
|
fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
|
|
return -1;
|
|
}
|
|
|
|
parse_rtattr(tb, XFRMA_MAX, XFRMP_RTA(xpinfo), len);
|
|
|
|
if (tb[XFRMA_POLICY_TYPE]) {
|
|
struct xfrm_userpolicy_type *upt;
|
|
|
|
if (RTA_PAYLOAD(tb[XFRMA_POLICY_TYPE]) < sizeof(*upt)) {
|
|
fprintf(stderr, "too short XFRMA_POLICY_TYPE len\n");
|
|
return -1;
|
|
}
|
|
upt = RTA_DATA(tb[XFRMA_POLICY_TYPE]);
|
|
ptype = upt->type;
|
|
}
|
|
|
|
if (!xfrm_policy_filter_match(xpinfo, ptype))
|
|
return 0;
|
|
|
|
/* can't delete socket policies */
|
|
if (xpinfo->dir >= XFRM_POLICY_MAX)
|
|
return 0;
|
|
|
|
if (xb->offset + NLMSG_LENGTH(sizeof(*xpid)) > xb->size)
|
|
return 0;
|
|
|
|
new_n = (struct nlmsghdr *)(xb->buf + xb->offset);
|
|
new_n->nlmsg_len = NLMSG_LENGTH(sizeof(*xpid));
|
|
new_n->nlmsg_flags = NLM_F_REQUEST;
|
|
new_n->nlmsg_type = XFRM_MSG_DELPOLICY;
|
|
new_n->nlmsg_seq = ++rth->seq;
|
|
|
|
xpid = NLMSG_DATA(new_n);
|
|
memcpy(&xpid->sel, &xpinfo->sel, sizeof(xpid->sel));
|
|
xpid->dir = xpinfo->dir;
|
|
xpid->index = xpinfo->index;
|
|
|
|
if (tb[XFRMA_MARK]) {
|
|
int r = addattr_l(new_n, xb->size, XFRMA_MARK,
|
|
(void *)RTA_DATA(tb[XFRMA_MARK]), tb[XFRMA_MARK]->rta_len);
|
|
if (r < 0) {
|
|
fprintf(stderr, "%s: XFRMA_MARK failed\n", __func__);
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
xb->offset += new_n->nlmsg_len;
|
|
xb->nlmsg_count++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xfrm_policy_list_or_deleteall(int argc, char **argv, int deleteall)
|
|
{
|
|
char *selp = NULL;
|
|
struct rtnl_handle rth;
|
|
|
|
if (argc > 0)
|
|
filter.use = 1;
|
|
filter.xpinfo.sel.family = preferred_family;
|
|
|
|
while (argc > 0) {
|
|
if (strcmp(*argv, "dir") == 0) {
|
|
NEXT_ARG();
|
|
xfrm_policy_dir_parse(&filter.xpinfo.dir, &argc, &argv);
|
|
|
|
filter.dir_mask = XFRM_FILTER_MASK_FULL;
|
|
|
|
} else if (strcmp(*argv, "index") == 0) {
|
|
NEXT_ARG();
|
|
if (get_u32(&filter.xpinfo.index, *argv, 0))
|
|
invarg("INDEX value is invalid", *argv);
|
|
|
|
filter.index_mask = XFRM_FILTER_MASK_FULL;
|
|
|
|
} else if (strcmp(*argv, "ptype") == 0) {
|
|
NEXT_ARG();
|
|
xfrm_policy_ptype_parse(&filter.ptype, &argc, &argv);
|
|
|
|
filter.ptype_mask = XFRM_FILTER_MASK_FULL;
|
|
|
|
} else if (strcmp(*argv, "action") == 0) {
|
|
NEXT_ARG();
|
|
if (strcmp(*argv, "allow") == 0)
|
|
filter.xpinfo.action = XFRM_POLICY_ALLOW;
|
|
else if (strcmp(*argv, "block") == 0)
|
|
filter.xpinfo.action = XFRM_POLICY_BLOCK;
|
|
else
|
|
invarg("ACTION value is invalid\n", *argv);
|
|
|
|
filter.action_mask = XFRM_FILTER_MASK_FULL;
|
|
|
|
} else if (strcmp(*argv, "priority") == 0) {
|
|
NEXT_ARG();
|
|
if (get_u32(&filter.xpinfo.priority, *argv, 0))
|
|
invarg("PRIORITY value is invalid", *argv);
|
|
|
|
filter.priority_mask = XFRM_FILTER_MASK_FULL;
|
|
|
|
} else if (strcmp(*argv, "flag") == 0) {
|
|
NEXT_ARG();
|
|
xfrm_policy_flag_parse(&filter.xpinfo.flags, &argc,
|
|
&argv);
|
|
|
|
filter.policy_flags_mask = XFRM_FILTER_MASK_FULL;
|
|
|
|
} else if (strcmp(*argv, "nosock") == 0) {
|
|
/* filter all socket-based policies */
|
|
filter.filter_socket = 1;
|
|
} else {
|
|
if (selp)
|
|
invarg("unknown", *argv);
|
|
selp = *argv;
|
|
|
|
xfrm_selector_parse(&filter.xpinfo.sel, &argc, &argv);
|
|
if (preferred_family == AF_UNSPEC)
|
|
preferred_family = filter.xpinfo.sel.family;
|
|
|
|
}
|
|
|
|
argc--; argv++;
|
|
}
|
|
|
|
if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
|
|
exit(1);
|
|
|
|
if (deleteall) {
|
|
struct xfrm_buffer xb;
|
|
char buf[NLMSG_DELETEALL_BUF_SIZE];
|
|
int i;
|
|
|
|
xb.buf = buf;
|
|
xb.size = sizeof(buf);
|
|
xb.rth = &rth;
|
|
|
|
for (i = 0; ; i++) {
|
|
struct {
|
|
struct nlmsghdr n;
|
|
char buf[NLMSG_BUF_SIZE];
|
|
} req = {
|
|
.n.nlmsg_len = NLMSG_HDRLEN,
|
|
.n.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
|
|
.n.nlmsg_type = XFRM_MSG_GETPOLICY,
|
|
.n.nlmsg_seq = rth.dump = ++rth.seq,
|
|
};
|
|
|
|
xb.offset = 0;
|
|
xb.nlmsg_count = 0;
|
|
|
|
if (show_stats > 1)
|
|
fprintf(stderr, "Delete-all round = %d\n", i);
|
|
|
|
if (rtnl_send(&rth, (void *)&req, req.n.nlmsg_len) < 0) {
|
|
perror("Cannot send dump request");
|
|
exit(1);
|
|
}
|
|
|
|
if (rtnl_dump_filter(&rth, xfrm_policy_keep, &xb) < 0) {
|
|
fprintf(stderr, "Delete-all terminated\n");
|
|
exit(1);
|
|
}
|
|
if (xb.nlmsg_count == 0) {
|
|
if (show_stats > 1)
|
|
fprintf(stderr, "Delete-all completed\n");
|
|
break;
|
|
}
|
|
|
|
if (rtnl_send_check(&rth, xb.buf, xb.offset) < 0) {
|
|
perror("Failed to send delete-all request");
|
|
exit(1);
|
|
}
|
|
if (show_stats > 1)
|
|
fprintf(stderr, "Delete-all nlmsg count = %d\n", xb.nlmsg_count);
|
|
|
|
xb.offset = 0;
|
|
xb.nlmsg_count = 0;
|
|
}
|
|
} else {
|
|
struct {
|
|
struct nlmsghdr n;
|
|
char buf[NLMSG_BUF_SIZE];
|
|
} req = {
|
|
.n.nlmsg_len = NLMSG_HDRLEN,
|
|
.n.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
|
|
.n.nlmsg_type = XFRM_MSG_GETPOLICY,
|
|
.n.nlmsg_seq = rth.dump = ++rth.seq,
|
|
};
|
|
|
|
if (rtnl_send(&rth, (void *)&req, req.n.nlmsg_len) < 0) {
|
|
perror("Cannot send dump request");
|
|
exit(1);
|
|
}
|
|
|
|
if (rtnl_dump_filter(&rth, xfrm_policy_print, stdout) < 0) {
|
|
fprintf(stderr, "Dump terminated\n");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
rtnl_close(&rth);
|
|
|
|
exit(0);
|
|
}
|
|
|
|
static int print_spdinfo(struct nlmsghdr *n, void *arg)
|
|
{
|
|
FILE *fp = (FILE *)arg;
|
|
__u32 *f = NLMSG_DATA(n);
|
|
struct rtattr *tb[XFRMA_SPD_MAX+1];
|
|
struct rtattr *rta;
|
|
|
|
int len = n->nlmsg_len;
|
|
|
|
len -= NLMSG_LENGTH(sizeof(__u32));
|
|
if (len < 0) {
|
|
fprintf(stderr, "SPDinfo: Wrong len %d\n", len);
|
|
return -1;
|
|
}
|
|
|
|
rta = XFRMSAPD_RTA(f);
|
|
parse_rtattr(tb, XFRMA_SPD_MAX, rta, len);
|
|
|
|
fprintf(fp, "\t SPD");
|
|
if (tb[XFRMA_SPD_INFO]) {
|
|
struct xfrmu_spdinfo *si;
|
|
|
|
if (RTA_PAYLOAD(tb[XFRMA_SPD_INFO]) < sizeof(*si)) {
|
|
fprintf(stderr, "SPDinfo: Wrong len %d\n", len);
|
|
return -1;
|
|
}
|
|
si = RTA_DATA(tb[XFRMA_SPD_INFO]);
|
|
fprintf(fp, " IN %d", si->incnt);
|
|
fprintf(fp, " OUT %d", si->outcnt);
|
|
fprintf(fp, " FWD %d", si->fwdcnt);
|
|
|
|
if (show_stats) {
|
|
fprintf(fp, " (Sock:");
|
|
fprintf(fp, " IN %d", si->inscnt);
|
|
fprintf(fp, " OUT %d", si->outscnt);
|
|
fprintf(fp, " FWD %d", si->fwdscnt);
|
|
fprintf(fp, ")");
|
|
}
|
|
|
|
fprintf(fp, "%s", _SL_);
|
|
}
|
|
if (show_stats > 1) {
|
|
struct xfrmu_spdhinfo *sh;
|
|
|
|
if (tb[XFRMA_SPD_HINFO]) {
|
|
if (RTA_PAYLOAD(tb[XFRMA_SPD_HINFO]) < sizeof(*sh)) {
|
|
fprintf(stderr, "SPDinfo: Wrong len %d\n", len);
|
|
return -1;
|
|
}
|
|
sh = RTA_DATA(tb[XFRMA_SPD_HINFO]);
|
|
fprintf(fp, "\t SPD buckets:");
|
|
fprintf(fp, " count %d", sh->spdhcnt);
|
|
fprintf(fp, " Max %d", sh->spdhmcnt);
|
|
fprintf(fp, "%s", _SL_);
|
|
}
|
|
if (tb[XFRMA_SPD_IPV4_HTHRESH]) {
|
|
struct xfrmu_spdhthresh *th;
|
|
|
|
if (RTA_PAYLOAD(tb[XFRMA_SPD_IPV4_HTHRESH]) < sizeof(*th)) {
|
|
fprintf(stderr, "SPDinfo: Wrong len %d\n", len);
|
|
return -1;
|
|
}
|
|
th = RTA_DATA(tb[XFRMA_SPD_IPV4_HTHRESH]);
|
|
fprintf(fp, "\t SPD IPv4 thresholds:");
|
|
fprintf(fp, " local %d", th->lbits);
|
|
fprintf(fp, " remote %d", th->rbits);
|
|
fprintf(fp, "%s", _SL_);
|
|
|
|
}
|
|
if (tb[XFRMA_SPD_IPV6_HTHRESH]) {
|
|
struct xfrmu_spdhthresh *th;
|
|
|
|
if (RTA_PAYLOAD(tb[XFRMA_SPD_IPV6_HTHRESH]) < sizeof(*th)) {
|
|
fprintf(stderr, "SPDinfo: Wrong len %d\n", len);
|
|
return -1;
|
|
}
|
|
th = RTA_DATA(tb[XFRMA_SPD_IPV6_HTHRESH]);
|
|
fprintf(fp, "\t SPD IPv6 thresholds:");
|
|
fprintf(fp, " local %d", th->lbits);
|
|
fprintf(fp, " remote %d", th->rbits);
|
|
fprintf(fp, "%s", _SL_);
|
|
}
|
|
}
|
|
|
|
if (oneline)
|
|
fprintf(fp, "\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xfrm_spd_setinfo(int argc, char **argv)
|
|
{
|
|
struct rtnl_handle rth;
|
|
struct {
|
|
struct nlmsghdr n;
|
|
__u32 flags;
|
|
char buf[RTA_BUF_SIZE];
|
|
} req = {
|
|
.n.nlmsg_len = NLMSG_LENGTH(sizeof(__u32)),
|
|
.n.nlmsg_flags = NLM_F_REQUEST,
|
|
.n.nlmsg_type = XFRM_MSG_NEWSPDINFO,
|
|
.flags = 0XFFFFFFFF,
|
|
};
|
|
|
|
char *thr4 = NULL;
|
|
char *thr6 = NULL;
|
|
|
|
while (argc > 0) {
|
|
if (strcmp(*argv, "hthresh4") == 0) {
|
|
struct xfrmu_spdhthresh thr;
|
|
|
|
if (thr4)
|
|
duparg("hthresh4", *argv);
|
|
thr4 = *argv;
|
|
NEXT_ARG();
|
|
if (get_u8(&thr.lbits, *argv, 0) || thr.lbits > 32)
|
|
invarg("hthresh4 LBITS value is invalid", *argv);
|
|
NEXT_ARG();
|
|
if (get_u8(&thr.rbits, *argv, 0) || thr.rbits > 32)
|
|
invarg("hthresh4 RBITS value is invalid", *argv);
|
|
|
|
addattr_l(&req.n, sizeof(req), XFRMA_SPD_IPV4_HTHRESH,
|
|
(void *)&thr, sizeof(thr));
|
|
} else if (strcmp(*argv, "hthresh6") == 0) {
|
|
struct xfrmu_spdhthresh thr;
|
|
|
|
if (thr6)
|
|
duparg("hthresh6", *argv);
|
|
thr6 = *argv;
|
|
NEXT_ARG();
|
|
if (get_u8(&thr.lbits, *argv, 0) || thr.lbits > 128)
|
|
invarg("hthresh6 LBITS value is invalid", *argv);
|
|
NEXT_ARG();
|
|
if (get_u8(&thr.rbits, *argv, 0) || thr.rbits > 128)
|
|
invarg("hthresh6 RBITS value is invalid", *argv);
|
|
|
|
addattr_l(&req.n, sizeof(req), XFRMA_SPD_IPV6_HTHRESH,
|
|
(void *)&thr, sizeof(thr));
|
|
} else {
|
|
invarg("unknown", *argv);
|
|
}
|
|
|
|
argc--; argv++;
|
|
}
|
|
|
|
if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
|
|
exit(1);
|
|
|
|
if (rtnl_talk(&rth, &req.n, NULL, 0) < 0)
|
|
exit(2);
|
|
|
|
rtnl_close(&rth);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xfrm_spd_getinfo(int argc, char **argv)
|
|
{
|
|
struct rtnl_handle rth;
|
|
struct {
|
|
struct nlmsghdr n;
|
|
__u32 flags;
|
|
char ans[128];
|
|
} req = {
|
|
.n.nlmsg_len = NLMSG_LENGTH(sizeof(__u32)),
|
|
.n.nlmsg_flags = NLM_F_REQUEST,
|
|
.n.nlmsg_type = XFRM_MSG_GETSPDINFO,
|
|
.flags = 0XFFFFFFFF,
|
|
};
|
|
|
|
if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
|
|
exit(1);
|
|
|
|
if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0)
|
|
exit(2);
|
|
|
|
print_spdinfo(&req.n, (void *)stdout);
|
|
|
|
rtnl_close(&rth);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xfrm_policy_flush(int argc, char **argv)
|
|
{
|
|
struct rtnl_handle rth;
|
|
struct {
|
|
struct nlmsghdr n;
|
|
char buf[RTA_BUF_SIZE];
|
|
} req = {
|
|
.n.nlmsg_len = NLMSG_LENGTH(0), /* nlmsg data is nothing */
|
|
.n.nlmsg_flags = NLM_F_REQUEST,
|
|
.n.nlmsg_type = XFRM_MSG_FLUSHPOLICY,
|
|
};
|
|
char *ptypep = NULL;
|
|
struct xfrm_userpolicy_type upt = {};
|
|
|
|
while (argc > 0) {
|
|
if (strcmp(*argv, "ptype") == 0) {
|
|
if (ptypep)
|
|
duparg("ptype", *argv);
|
|
ptypep = *argv;
|
|
|
|
NEXT_ARG();
|
|
xfrm_policy_ptype_parse(&upt.type, &argc, &argv);
|
|
} else
|
|
invarg("unknown", *argv);
|
|
|
|
argc--; argv++;
|
|
}
|
|
|
|
if (ptypep) {
|
|
addattr_l(&req.n, sizeof(req), XFRMA_POLICY_TYPE,
|
|
(void *)&upt, sizeof(upt));
|
|
}
|
|
|
|
if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
|
|
exit(1);
|
|
|
|
if (show_stats > 1)
|
|
fprintf(stderr, "Flush policy\n");
|
|
|
|
if (rtnl_talk(&rth, &req.n, NULL, 0) < 0)
|
|
exit(2);
|
|
|
|
rtnl_close(&rth);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int do_xfrm_policy(int argc, char **argv)
|
|
{
|
|
if (argc < 1)
|
|
return xfrm_policy_list_or_deleteall(0, NULL, 0);
|
|
|
|
if (matches(*argv, "add") == 0)
|
|
return xfrm_policy_modify(XFRM_MSG_NEWPOLICY, 0,
|
|
argc-1, argv+1);
|
|
if (matches(*argv, "update") == 0)
|
|
return xfrm_policy_modify(XFRM_MSG_UPDPOLICY, 0,
|
|
argc-1, argv+1);
|
|
if (matches(*argv, "delete") == 0)
|
|
return xfrm_policy_delete(argc-1, argv+1);
|
|
if (matches(*argv, "deleteall") == 0 || matches(*argv, "delall") == 0)
|
|
return xfrm_policy_list_or_deleteall(argc-1, argv+1, 1);
|
|
if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
|
|
|| matches(*argv, "lst") == 0)
|
|
return xfrm_policy_list_or_deleteall(argc-1, argv+1, 0);
|
|
if (matches(*argv, "get") == 0)
|
|
return xfrm_policy_get(argc-1, argv+1);
|
|
if (matches(*argv, "flush") == 0)
|
|
return xfrm_policy_flush(argc-1, argv+1);
|
|
if (matches(*argv, "count") == 0)
|
|
return xfrm_spd_getinfo(argc, argv);
|
|
if (matches(*argv, "set") == 0)
|
|
return xfrm_spd_setinfo(argc-1, argv+1);
|
|
if (matches(*argv, "help") == 0)
|
|
usage();
|
|
fprintf(stderr, "Command \"%s\" is unknown, try \"ip xfrm policy help\".\n", *argv);
|
|
exit(-1);
|
|
}
|