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PL286/external/iproute2/ip/xfrm_policy.c

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/* $USAGI: $ */
/*
* Copyright (C)2004 USAGI/WIDE Project
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses>.
*/
/*
* based on iproute.c
*/
/*
* Authors:
* Masahide NAKAMURA @USAGI
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netdb.h>
#include <linux/netlink.h>
#include "utils.h"
#include "xfrm.h"
#include "ip_common.h"
//#define NLMSG_DELETEALL_BUF_SIZE (4096-512)
#define NLMSG_DELETEALL_BUF_SIZE 8192
/*
* Receiving buffer defines:
* nlmsg
* data = struct xfrm_userpolicy_info
* rtattr
* data = struct xfrm_user_tmpl[]
*/
#define NLMSG_BUF_SIZE 4096
#define RTA_BUF_SIZE 2048
#define XFRM_TMPLS_BUF_SIZE 1024
#define CTX_BUF_SIZE 256
static void usage(void) __attribute__((noreturn));
static void usage(void)
{
fprintf(stderr, "Usage: ip xfrm policy { add | update } SELECTOR dir DIR [ ctx CTX ]\n");
fprintf(stderr, " [ mark MARK [ mask MASK ] ] [ index INDEX ] [ ptype PTYPE ]\n");
fprintf(stderr, " [ action ACTION ] [ priority PRIORITY ] [ flag FLAG-LIST ]\n");
fprintf(stderr, " [ LIMIT-LIST ] [ TMPL-LIST ]\n");
fprintf(stderr, "Usage: ip xfrm policy { delete | get } { SELECTOR | index INDEX } dir DIR\n");
fprintf(stderr, " [ ctx CTX ] [ mark MARK [ mask MASK ] ] [ ptype PTYPE ]\n");
fprintf(stderr, "Usage: ip xfrm policy { deleteall | list } [ SELECTOR ] [ dir DIR ]\n");
fprintf(stderr, " [ index INDEX ] [ ptype PTYPE ] [ action ACTION ] [ priority PRIORITY ]\n");
fprintf(stderr, " [ flag FLAG-LIST ]\n");
fprintf(stderr, "Usage: ip xfrm policy flush [ ptype PTYPE ]\n");
fprintf(stderr, "Usage: ip xfrm policy count\n");
fprintf(stderr, "Usage: ip xfrm policy set [ hthresh4 LBITS RBITS ] [ hthresh6 LBITS RBITS ]\n");
fprintf(stderr, "SELECTOR := [ src ADDR[/PLEN] ] [ dst ADDR[/PLEN] ] [ dev DEV ] [ UPSPEC ]\n");
fprintf(stderr, "UPSPEC := proto { { ");
fprintf(stderr, "%s | ", strxf_proto(IPPROTO_TCP));
fprintf(stderr, "%s | ", strxf_proto(IPPROTO_UDP));
fprintf(stderr, "%s | ", strxf_proto(IPPROTO_SCTP));
fprintf(stderr, "%s", strxf_proto(IPPROTO_DCCP));
fprintf(stderr, " } [ sport PORT ] [ dport PORT ] |\n");
fprintf(stderr, " { ");
fprintf(stderr, "%s | ", strxf_proto(IPPROTO_ICMP));
fprintf(stderr, "%s | ", strxf_proto(IPPROTO_ICMPV6));
fprintf(stderr, "%s", strxf_proto(IPPROTO_MH));
fprintf(stderr, " } [ type NUMBER ] [ code NUMBER ] |\n");
fprintf(stderr, " %s", strxf_proto(IPPROTO_GRE));
fprintf(stderr, " [ key { DOTTED-QUAD | NUMBER } ] | PROTO }\n");
fprintf(stderr, "DIR := in | out | fwd\n");
fprintf(stderr, "PTYPE := main | sub\n");
fprintf(stderr, "ACTION := allow | block\n");
fprintf(stderr, "FLAG-LIST := [ FLAG-LIST ] FLAG\n");
fprintf(stderr, "FLAG := localok | icmp\n");
fprintf(stderr, "LIMIT-LIST := [ LIMIT-LIST ] limit LIMIT\n");
fprintf(stderr, "LIMIT := { time-soft | time-hard | time-use-soft | time-use-hard } SECONDS |\n");
fprintf(stderr, " { byte-soft | byte-hard } SIZE | { packet-soft | packet-hard } COUNT\n");
fprintf(stderr, "TMPL-LIST := [ TMPL-LIST ] tmpl TMPL\n");
fprintf(stderr, "TMPL := ID [ mode MODE ] [ reqid REQID ] [ level LEVEL ]\n");
fprintf(stderr, "ID := [ src ADDR ] [ dst ADDR ] [ proto XFRM-PROTO ] [ spi SPI ]\n");
fprintf(stderr, "XFRM-PROTO := ");
fprintf(stderr, "%s | ", strxf_xfrmproto(IPPROTO_ESP));
fprintf(stderr, "%s | ", strxf_xfrmproto(IPPROTO_AH));
fprintf(stderr, "%s | ", strxf_xfrmproto(IPPROTO_COMP));
fprintf(stderr, "%s | ", strxf_xfrmproto(IPPROTO_ROUTING));
fprintf(stderr, "%s\n", strxf_xfrmproto(IPPROTO_DSTOPTS));
fprintf(stderr, "MODE := transport | tunnel | beet | ro | in_trigger\n");
fprintf(stderr, "LEVEL := required | use\n");
exit(-1);
}
static int xfrm_policy_dir_parse(__u8 *dir, int *argcp, char ***argvp)
{
int argc = *argcp;
char **argv = *argvp;
if (strcmp(*argv, "in") == 0)
*dir = XFRM_POLICY_IN;
else if (strcmp(*argv, "out") == 0)
*dir = XFRM_POLICY_OUT;
else if (strcmp(*argv, "fwd") == 0)
*dir = XFRM_POLICY_FWD;
else
invarg("DIR value is invalid", *argv);
*argcp = argc;
*argvp = argv;
return 0;
}
static int xfrm_policy_ptype_parse(__u8 *ptype, int *argcp, char ***argvp)
{
int argc = *argcp;
char **argv = *argvp;
if (strcmp(*argv, "main") == 0)
*ptype = XFRM_POLICY_TYPE_MAIN;
else if (strcmp(*argv, "sub") == 0)
*ptype = XFRM_POLICY_TYPE_SUB;
else
invarg("PTYPE value is invalid", *argv);
*argcp = argc;
*argvp = argv;
return 0;
}
static int xfrm_policy_flag_parse(__u8 *flags, int *argcp, char ***argvp)
{
int argc = *argcp;
char **argv = *argvp;
int len = strlen(*argv);
if (len > 2 && strncmp(*argv, "0x", 2) == 0) {
__u8 val = 0;
if (get_u8(&val, *argv, 16))
invarg("FLAG value is invalid", *argv);
*flags = val;
} else {
while (1) {
if (strcmp(*argv, "localok") == 0)
*flags |= XFRM_POLICY_LOCALOK;
else if (strcmp(*argv, "icmp") == 0)
*flags |= XFRM_POLICY_ICMP;
else {
PREV_ARG(); /* back track */
break;
}
if (!NEXT_ARG_OK())
break;
NEXT_ARG();
}
}
*argcp = argc;
*argvp = argv;
return 0;
}
static int xfrm_tmpl_parse(struct xfrm_user_tmpl *tmpl,
int *argcp, char ***argvp)
{
int argc = *argcp;
char **argv = *argvp;
char *idp = NULL;
while (1) {
if (strcmp(*argv, "mode") == 0) {
NEXT_ARG();
xfrm_mode_parse(&tmpl->mode, &argc, &argv);
} else if (strcmp(*argv, "reqid") == 0) {
NEXT_ARG();
xfrm_reqid_parse(&tmpl->reqid, &argc, &argv);
} else if (strcmp(*argv, "level") == 0) {
NEXT_ARG();
if (strcmp(*argv, "required") == 0)
tmpl->optional = 0;
else if (strcmp(*argv, "use") == 0)
tmpl->optional = 1;
else
invarg("LEVEL value is invalid\n", *argv);
} else {
if (idp) {
PREV_ARG(); /* back track */
break;
}
idp = *argv;
preferred_family = AF_UNSPEC;
xfrm_id_parse(&tmpl->saddr, &tmpl->id, &tmpl->family,
0, &argc, &argv);
preferred_family = tmpl->family;
}
if (!NEXT_ARG_OK())
break;
NEXT_ARG();
}
if (argc == *argcp)
missarg("TMPL");
*argcp = argc;
*argvp = argv;
return 0;
}
int xfrm_sctx_parse(char *ctxstr, char *s,
struct xfrm_user_sec_ctx *sctx)
{
int slen;
slen = strlen(s) + 1;
sctx->exttype = XFRMA_SEC_CTX;
sctx->ctx_doi = 1;
sctx->ctx_alg = 1;
sctx->ctx_len = slen;
sctx->len = sizeof(struct xfrm_user_sec_ctx) + slen;
memcpy(ctxstr, s, slen);
return 0;
}
static int xfrm_policy_modify(int cmd, unsigned flags, int argc, char **argv)
{
struct rtnl_handle rth;
struct {
struct nlmsghdr n;
struct xfrm_userpolicy_info xpinfo;
char buf[RTA_BUF_SIZE];
} req;
char *dirp = NULL;
char *selp = NULL;
char *ptypep = NULL;
char *sctxp = NULL;
struct xfrm_userpolicy_type upt;
char tmpls_buf[XFRM_TMPLS_BUF_SIZE];
int tmpls_len = 0;
struct xfrm_mark mark = {0, 0};
struct {
struct xfrm_user_sec_ctx sctx;
char str[CTX_BUF_SIZE];
} ctx;
memset(&req, 0, sizeof(req));
memset(&upt, 0, sizeof(upt));
memset(&tmpls_buf, 0, sizeof(tmpls_buf));
memset(&ctx, 0, sizeof(ctx));
req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xpinfo));
req.n.nlmsg_flags = NLM_F_REQUEST|flags;
req.n.nlmsg_type = cmd;
req.xpinfo.sel.family = preferred_family;
req.xpinfo.lft.soft_byte_limit = XFRM_INF;
req.xpinfo.lft.hard_byte_limit = XFRM_INF;
req.xpinfo.lft.soft_packet_limit = XFRM_INF;
req.xpinfo.lft.hard_packet_limit = XFRM_INF;
while (argc > 0) {
if (strcmp(*argv, "dir") == 0) {
if (dirp)
duparg("dir", *argv);
dirp = *argv;
NEXT_ARG();
xfrm_policy_dir_parse(&req.xpinfo.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) {
NEXT_ARG();
if (get_u32(&req.xpinfo.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 (strcmp(*argv, "action") == 0) {
NEXT_ARG();
if (strcmp(*argv, "allow") == 0)
req.xpinfo.action = XFRM_POLICY_ALLOW;
else if (strcmp(*argv, "block") == 0)
req.xpinfo.action = XFRM_POLICY_BLOCK;
else
invarg("ACTION value is invalid\n", *argv);
} else if (strcmp(*argv, "priority") == 0) {
NEXT_ARG();
if (get_u32(&req.xpinfo.priority, *argv, 0))
invarg("PRIORITY value is invalid", *argv);
} else if (strcmp(*argv, "flag") == 0) {
NEXT_ARG();
xfrm_policy_flag_parse(&req.xpinfo.flags, &argc,
&argv);
} else if (strcmp(*argv, "limit") == 0) {
NEXT_ARG();
xfrm_lifetime_cfg_parse(&req.xpinfo.lft, &argc, &argv);
} else if (strcmp(*argv, "tmpl") == 0) {
struct xfrm_user_tmpl *tmpl;
if (tmpls_len + sizeof(*tmpl) > sizeof(tmpls_buf)) {
fprintf(stderr, "Too many tmpls: buffer overflow\n");
exit(1);
}
tmpl = (struct xfrm_user_tmpl *)((char *)tmpls_buf + tmpls_len);
tmpl->family = preferred_family;
tmpl->aalgos = (~(__u32)0);
tmpl->ealgos = (~(__u32)0);
tmpl->calgos = (~(__u32)0);
NEXT_ARG();
xfrm_tmpl_parse(tmpl, &argc, &argv);
tmpls_len += sizeof(*tmpl);
} else {
if (selp)
duparg("unknown", *argv);
selp = *argv;
xfrm_selector_parse(&req.xpinfo.sel, &argc, &argv);
if (preferred_family == AF_UNSPEC)
preferred_family = req.xpinfo.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 (tmpls_len > 0) {
addattr_l(&req.n, sizeof(req), XFRMA_TMPL,
(void *)tmpls_buf, tmpls_len);
}
if (mark.m) {
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_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
exit(1);
if (req.xpinfo.sel.family == AF_UNSPEC)
req.xpinfo.sel.family = AF_INET;
if (rtnl_talk(&rth, &req.n, NULL, 0) < 0)
exit(2);
rtnl_close(&rth);
return 0;
}
static int xfrm_policy_filter_match(struct xfrm_userpolicy_info *xpinfo,
__u8 ptype)
{
if (!filter.use)
return 1;
if ((xpinfo->dir^filter.xpinfo.dir)&filter.dir_mask)
return 0;
if ((ptype^filter.ptype)&filter.ptype_mask)
return 0;
if (filter.sel_src_mask) {
if (xfrm_addr_match(&xpinfo->sel.saddr, &filter.xpinfo.sel.saddr,
filter.sel_src_mask))
return 0;
}
if (filter.sel_dst_mask) {
if (xfrm_addr_match(&xpinfo->sel.daddr, &filter.xpinfo.sel.daddr,
filter.sel_dst_mask))
return 0;
}
if ((xpinfo->sel.ifindex^filter.xpinfo.sel.ifindex)&filter.sel_dev_mask)
return 0;
if ((xpinfo->sel.proto^filter.xpinfo.sel.proto)&filter.upspec_proto_mask)
return 0;
if (filter.upspec_sport_mask) {
if ((xpinfo->sel.sport^filter.xpinfo.sel.sport)&filter.upspec_sport_mask)
return 0;
}
if (filter.upspec_dport_mask) {
if ((xpinfo->sel.dport^filter.xpinfo.sel.dport)&filter.upspec_dport_mask)
return 0;
}
if ((xpinfo->index^filter.xpinfo.index)&filter.index_mask)
return 0;
if ((xpinfo->action^filter.xpinfo.action)&filter.action_mask)
return 0;
if ((xpinfo->priority^filter.xpinfo.priority)&filter.priority_mask)
return 0;
if (filter.policy_flags_mask)
if ((xpinfo->flags & filter.xpinfo.flags) == 0)
return 0;
return 1;
}
int xfrm_policy_print(const struct sockaddr_nl *who, struct nlmsghdr *n,
void *arg)
{
struct rtattr * tb[XFRMA_MAX+1];
struct rtattr * rta;
struct xfrm_userpolicy_info *xpinfo = NULL;
struct xfrm_user_polexpire *xpexp = NULL;
struct xfrm_userpolicy_id *xpid = NULL;
__u8 ptype = XFRM_POLICY_TYPE_MAIN;
FILE *fp = (FILE*)arg;
int len = n->nlmsg_len;
if (n->nlmsg_type != XFRM_MSG_NEWPOLICY &&
n->nlmsg_type != XFRM_MSG_DELPOLICY &&
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 = (struct xfrm_userpolicy_type *)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 = (struct xfrm_userpolicy_info *)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;
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;
memset(&req, 0, sizeof(req));
memset(&upt, 0, sizeof(upt));
memset(&ctx, 0, sizeof(ctx));
req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xpid));
req.n.nlmsg_flags = NLM_F_REQUEST;
req.n.nlmsg_type = delete ? XFRM_MSG_DELPOLICY : XFRM_MSG_GETPOLICY;
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;
memset(buf, 0, sizeof(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 = (struct xfrm_userpolicy_type *)RTA_DATA(tb[XFRMA_POLICY_TYPE]);
ptype = upt->type;
}
if (!xfrm_policy_filter_match(xpinfo, ptype))
return 0;
if (xb->offset > xb->size) {
fprintf(stderr, "Policy buffer overflow\n");
return -1;
}
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;
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 (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;
char *thr4 = NULL;
char *thr6 = NULL;
memset(&req, 0, sizeof(req));
req.n.nlmsg_len = NLMSG_LENGTH(sizeof(__u32));
req.n.nlmsg_flags = NLM_F_REQUEST;
req.n.nlmsg_type = XFRM_MSG_NEWSPDINFO;
req.flags = 0XFFFFFFFF;
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;
memset(&req, 0, sizeof(req));
req.n.nlmsg_len = NLMSG_LENGTH(sizeof(__u32));
req.n.nlmsg_flags = NLM_F_REQUEST;
req.n.nlmsg_type = XFRM_MSG_GETSPDINFO;
req.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;
char *ptypep = NULL;
struct xfrm_userpolicy_type upt;
memset(&req, 0, sizeof(req));
memset(&upt, 0, sizeof(upt));
req.n.nlmsg_len = NLMSG_LENGTH(0); /* nlmsg data is nothing */
req.n.nlmsg_flags = NLM_F_REQUEST;
req.n.nlmsg_type = XFRM_MSG_FLUSHPOLICY;
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);
}