/* $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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* based on iproute.c
*/
/*
* Authors:
* Masahide NAKAMURA @USAGI
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netdb.h>
#include <endian.h>
#include <linux/xfrm.h>
#include <linux/in.h>
#include <linux/in6.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_usersa_info
* rtattr
* rtattr
* ... (max count of rtattr is XFRM_MAX+1
*
* each rtattr data = struct xfrm_algo(dynamic size) or xfrm_address_t
*/
#define NLMSG_BUF_SIZE 4096
#define RTA_BUF_SIZE 2048
#define XFRM_ALGO_KEY_BUF_SIZE 512
#define CTX_BUF_SIZE 256
static void usage(void) __attribute__((noreturn));
static void usage(void)
{
fprintf(stderr, "Usage: ip xfrm state { add | update } ID [ ALGO-LIST ] [ mode MODE ]\n");
fprintf(stderr, " [ mark MARK [ mask MASK ] ] [ reqid REQID ] [ seq SEQ ]\n");
fprintf(stderr, " [ replay-window SIZE ] [ replay-seq SEQ ] [ replay-oseq SEQ ]\n");
fprintf(stderr, " [ flag FLAG-LIST ] [ sel SELECTOR ] [ LIMIT-LIST ] [ encap ENCAP ]\n");
fprintf(stderr, " [ coa ADDR[/PLEN] ] [ ctx CTX ]\n");
fprintf(stderr, "Usage: ip xfrm state allocspi ID [ mode MODE ] [ mark MARK [ mask MASK ] ]\n");
fprintf(stderr, " [ reqid REQID ] [ seq SEQ ] [ min SPI max SPI ]\n");
fprintf(stderr, "Usage: ip xfrm state { delete | get } ID [ mark MARK [ mask MASK ] ]\n");
fprintf(stderr, "Usage: ip xfrm state { deleteall | list } [ ID ] [ mode MODE ] [ reqid REQID ]\n");
fprintf(stderr, " [ flag FLAG-LIST ]\n");
fprintf(stderr, "Usage: ip xfrm state flush [ proto XFRM-PROTO ]\n");
fprintf(stderr, "Usage: ip xfrm state count\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, "ALGO-LIST := [ ALGO-LIST ] ALGO\n");
fprintf(stderr, "ALGO := { ");
fprintf(stderr, "%s | ", strxf_algotype(XFRMA_ALG_CRYPT));
fprintf(stderr, "%s | ", strxf_algotype(XFRMA_ALG_AUTH));
fprintf(stderr, "%s", strxf_algotype(XFRMA_ALG_COMP));
fprintf(stderr, " } ALGO-NAME ALGO-KEY |\n");
fprintf(stderr, " %s", strxf_algotype(XFRMA_ALG_AEAD));
fprintf(stderr, " ALGO-NAME ALGO-KEY ALGO-ICV-LEN |\n");
fprintf(stderr, " %s", strxf_algotype(XFRMA_ALG_AUTH_TRUNC));
fprintf(stderr, " ALGO-NAME ALGO-KEY ALGO-TRUNC-LEN\n");
fprintf(stderr, "MODE := transport | tunnel | ro | in_trigger | beet\n");
fprintf(stderr, "FLAG-LIST := [ FLAG-LIST ] FLAG\n");
fprintf(stderr, "FLAG := noecn | decap-dscp | nopmtudisc | wildrecv | icmp | af-unspec | align4\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, "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, "ENCAP := { espinudp | espinudp-nonike } SPORT DPORT OADDR\n");
exit(-1);
}
static int xfrm_algo_parse(struct xfrm_algo *alg, enum xfrm_attr_type_t type,
char *name, char *key, char *buf, int max)
{
int len;
int slen = strlen(key);
#if 0
/* XXX: verifying both name and key is required! */
fprintf(stderr, "warning: ALGO-NAME/ALGO-KEY will send to kernel promiscuously! (verifying them isn't implemented yet)\n");
#endif
strncpy(alg->alg_name, name, sizeof(alg->alg_name));
if (slen > 2 && strncmp(key, "0x", 2) == 0) {
/* split two chars "0x" from the top */
char *p = key + 2;
int plen = slen - 2;
int i;
int j;
/* Converting hexadecimal numbered string into real key;
* Convert each two chars into one char(value). If number
* of the length is odd, add zero on the top for rounding.
*/
/* calculate length of the converted values(real key) */
len = (plen + 1) / 2;
if (len > max)
invarg("\"ALGO-KEY\" makes buffer overflow\n", key);
for (i = - (plen % 2), j = 0; j < len; i += 2, j++) {
char vbuf[3];
__u8 val;
vbuf[0] = i >= 0 ? p[i] : '0';
vbuf[1] = p[i + 1];
vbuf[2] = '\0';
if (get_u8(&val, vbuf, 16))
invarg("\"ALGO-KEY\" is invalid", key);
buf[j] = val;
}
} else {
len = slen;
if (len > 0) {
if (len > max)
invarg("\"ALGO-KEY\" makes buffer overflow\n", key);
strncpy(buf, key, len);
}
}
alg->alg_key_len = len * 8;
return 0;
}
static int xfrm_seq_parse(__u32 *seq, int *argcp, char ***argvp)
{
int argc = *argcp;
char **argv = *argvp;
if (get_u32(seq, *argv, 0))
invarg("\"SEQ\" is invalid", *argv);
*seq = htonl(*seq);
*argcp = argc;
*argvp = argv;
return 0;
}
static int xfrm_state_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\" is invalid", *argv);
*flags = val;
} else {
while (1) {
if (strcmp(*argv, "noecn") == 0)
*flags |= XFRM_STATE_NOECN;
else if (strcmp(*argv, "decap-dscp") == 0)
*flags |= XFRM_STATE_DECAP_DSCP;
else if (strcmp(*argv, "nopmtudisc") == 0)
*flags |= XFRM_STATE_NOPMTUDISC;
else if (strcmp(*argv, "wildrecv") == 0)
*flags |= XFRM_STATE_WILDRECV;
else if (strcmp(*argv, "icmp") == 0)
*flags |= XFRM_STATE_ICMP;
else if (strcmp(*argv, "af-unspec") == 0)
*flags |= XFRM_STATE_AF_UNSPEC;
else if (strcmp(*argv, "align4") == 0)
*flags |= XFRM_STATE_ALIGN4;
else {
PREV_ARG(); /* back track */
break;
}
if (!NEXT_ARG_OK())
break;
NEXT_ARG();
}
}
*argcp = argc;
*argvp = argv;
return 0;
}
static int xfrm_state_modify(int cmd, unsigned flags, int argc, char **argv)
{
struct rtnl_handle rth;
struct {
struct nlmsghdr n;
struct xfrm_usersa_info xsinfo;
char buf[RTA_BUF_SIZE];
} req;
struct xfrm_replay_state replay;
char *idp = NULL;
char *aeadop = NULL;
char *ealgop = NULL;
char *aalgop = NULL;
char *calgop = NULL;
char *coap = NULL;
char *sctxp = NULL;
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(&replay, 0, sizeof(replay));
memset(&ctx, 0, sizeof(ctx));
req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsinfo));
req.n.nlmsg_flags = NLM_F_REQUEST|flags;
req.n.nlmsg_type = cmd;
req.xsinfo.family = preferred_family;
req.xsinfo.lft.soft_byte_limit = XFRM_INF;
req.xsinfo.lft.hard_byte_limit = XFRM_INF;
req.xsinfo.lft.soft_packet_limit = XFRM_INF;
req.xsinfo.lft.hard_packet_limit = XFRM_INF;
while (argc > 0) {
if (strcmp(*argv, "mode") == 0) {
NEXT_ARG();
xfrm_mode_parse(&req.xsinfo.mode, &argc, &argv);
} else if (strcmp(*argv, "mark") == 0) {
xfrm_parse_mark(&mark, &argc, &argv);
} else if (strcmp(*argv, "reqid") == 0) {
NEXT_ARG();
xfrm_reqid_parse(&req.xsinfo.reqid, &argc, &argv);
} else if (strcmp(*argv, "seq") == 0) {
NEXT_ARG();
xfrm_seq_parse(&req.xsinfo.seq, &argc, &argv);
} else if (strcmp(*argv, "replay-window") == 0) {
NEXT_ARG();
if (get_u8(&req.xsinfo.replay_window, *argv, 0))
invarg("\"replay-window\" value is invalid", *argv);
} else if (strcmp(*argv, "replay-seq") == 0) {
NEXT_ARG();
if (get_u32(&replay.seq, *argv, 0))
invarg("\"replay-seq\" value is invalid", *argv);
} else if (strcmp(*argv, "replay-oseq") == 0) {
NEXT_ARG();
if (get_u32(&replay.oseq, *argv, 0))
invarg("\"replay-oseq\" value is invalid", *argv);
} else if (strcmp(*argv, "flag") == 0) {
NEXT_ARG();
xfrm_state_flag_parse(&req.xsinfo.flags, &argc, &argv);
} else if (strcmp(*argv, "sel") == 0) {
NEXT_ARG();
xfrm_selector_parse(&req.xsinfo.sel, &argc, &argv);
} else if (strcmp(*argv, "limit") == 0) {
NEXT_ARG();
xfrm_lifetime_cfg_parse(&req.xsinfo.lft, &argc, &argv);
} else if (strcmp(*argv, "encap") == 0) {
struct xfrm_encap_tmpl encap;
inet_prefix oa;
NEXT_ARG();
xfrm_encap_type_parse(&encap.encap_type, &argc, &argv);
NEXT_ARG();
if (get_u16(&encap.encap_sport, *argv, 0))
invarg("\"encap\" sport value is invalid", *argv);
encap.encap_sport = htons(encap.encap_sport);
NEXT_ARG();
if (get_u16(&encap.encap_dport, *argv, 0))
invarg("\"encap\" dport value is invalid", *argv);
encap.encap_dport = htons(encap.encap_dport);
NEXT_ARG();
get_addr(&oa, *argv, AF_UNSPEC);
memcpy(&encap.encap_oa, &oa.data, sizeof(encap.encap_oa));
addattr_l(&req.n, sizeof(req.buf), XFRMA_ENCAP,
(void *)&encap, sizeof(encap));
} else if (strcmp(*argv, "coa") == 0) {
inet_prefix coa;
xfrm_address_t xcoa;
if (coap)
duparg("coa", *argv);
coap = *argv;
NEXT_ARG();
get_prefix(&coa, *argv, preferred_family);
if (coa.family == AF_UNSPEC)
invarg("\"coa\" address family is AF_UNSPEC", *argv);
if (coa.bytelen > sizeof(xcoa))
invarg("\"coa\" address length is too large", *argv);
memset(&xcoa, 0, sizeof(xcoa));
memcpy(&xcoa, &coa.data, coa.bytelen);
addattr_l(&req.n, sizeof(req.buf), XFRMA_COADDR,
(void *)&xcoa, sizeof(xcoa));
} 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);
addattr_l(&req.n, sizeof(req.buf), XFRMA_SEC_CTX,
(void *)&ctx, ctx.sctx.len);
} else {
/* try to assume ALGO */
int type = xfrm_algotype_getbyname(*argv);
switch (type) {
case XFRMA_ALG_AEAD:
case XFRMA_ALG_CRYPT:
case XFRMA_ALG_AUTH:
case XFRMA_ALG_AUTH_TRUNC:
case XFRMA_ALG_COMP:
{
/* ALGO */
struct {
union {
struct xfrm_algo alg;
struct xfrm_algo_aead aead;
struct xfrm_algo_auth auth;
} u;
char buf[XFRM_ALGO_KEY_BUF_SIZE];
} alg = {};
int len;
__u32 icvlen, trunclen;
char *name;
char *key;
char *buf;
switch (type) {
case XFRMA_ALG_AEAD:
if (aeadop)
duparg("ALGO-TYPE", *argv);
aeadop = *argv;
break;
case XFRMA_ALG_CRYPT:
if (ealgop)
duparg("ALGO-TYPE", *argv);
ealgop = *argv;
break;
case XFRMA_ALG_AUTH:
case XFRMA_ALG_AUTH_TRUNC:
if (aalgop)
duparg("ALGO-TYPE", *argv);
aalgop = *argv;
break;
case XFRMA_ALG_COMP:
if (calgop)
duparg("ALGO-TYPE", *argv);
calgop = *argv;
break;
default:
/* not reached */
invarg("\"ALGO-TYPE\" is invalid\n", *argv);
}
if (!NEXT_ARG_OK())
missarg("ALGO-NAME");
NEXT_ARG();
name = *argv;
if (!NEXT_ARG_OK())
missarg("ALGO-KEY");
NEXT_ARG();
key = *argv;
buf = alg.u.alg.alg_key;
len = sizeof(alg.u.alg);
switch (type) {
case XFRMA_ALG_AEAD:
if (!NEXT_ARG_OK())
missarg("ALGO-ICV-LEN");
NEXT_ARG();
if (get_u32(&icvlen, *argv, 0))
invarg("\"aead\" ICV length is invalid",
*argv);
alg.u.aead.alg_icv_len = icvlen;
buf = alg.u.aead.alg_key;
len = sizeof(alg.u.aead);
break;
case XFRMA_ALG_AUTH_TRUNC:
if (!NEXT_ARG_OK())
missarg("ALGO-TRUNC-LEN");
NEXT_ARG();
if (get_u32(&trunclen, *argv, 0))
invarg("\"auth\" trunc length is invalid",
*argv);
alg.u.auth.alg_trunc_len = trunclen;
buf = alg.u.auth.alg_key;
len = sizeof(alg.u.auth);
break;
}
xfrm_algo_parse((void *)&alg, type, name, key,
buf, sizeof(alg.buf));
len += alg.u.alg.alg_key_len;
addattr_l(&req.n, sizeof(req.buf), type,
(void *)&alg, len);
break;
}
default:
/* try to assume ID */
if (idp)
invarg("unknown", *argv);
idp = *argv;
/* ID */
xfrm_id_parse(&req.xsinfo.saddr, &req.xsinfo.id,
&req.xsinfo.family, 0, &argc, &argv);
if (preferred_family == AF_UNSPEC)
preferred_family = req.xsinfo.family;
}
}
argc--; argv++;
}
if (replay.seq || replay.oseq)
addattr_l(&req.n, sizeof(req.buf), XFRMA_REPLAY_VAL,
(void *)&replay, sizeof(replay));
if (!idp) {
fprintf(stderr, "Not enough information: \"ID\" is required\n");
exit(1);
}
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, "XFRMA_MARK failed\n");
exit(1);
}
}
switch (req.xsinfo.mode) {
case XFRM_MODE_TRANSPORT:
case XFRM_MODE_TUNNEL:
if (!xfrm_xfrmproto_is_ipsec(req.xsinfo.id.proto)) {
fprintf(stderr, "\"mode\" is invalid with proto=%s\n",
strxf_xfrmproto(req.xsinfo.id.proto));
exit(1);
}
break;
case XFRM_MODE_ROUTEOPTIMIZATION:
case XFRM_MODE_IN_TRIGGER:
if (!xfrm_xfrmproto_is_ro(req.xsinfo.id.proto)) {
fprintf(stderr, "\"mode\" is invalid with proto=%s\n",
strxf_xfrmproto(req.xsinfo.id.proto));
exit(1);
}
if (req.xsinfo.id.spi != 0) {
fprintf(stderr, "\"spi\" must be 0 with proto=%s\n",
strxf_xfrmproto(req.xsinfo.id.proto));
exit(1);
}
break;
default:
break;
}
if (aeadop || ealgop || aalgop || calgop) {
if (!xfrm_xfrmproto_is_ipsec(req.xsinfo.id.proto)) {
fprintf(stderr, "\"ALGO\" is invalid with proto=%s\n",
strxf_xfrmproto(req.xsinfo.id.proto));
exit(1);
}
} else {
if (xfrm_xfrmproto_is_ipsec(req.xsinfo.id.proto)) {
fprintf(stderr, "\"ALGO\" is required with proto=%s\n",
strxf_xfrmproto(req.xsinfo.id.proto));
exit (1);
}
}
if (coap) {
if (!xfrm_xfrmproto_is_ro(req.xsinfo.id.proto)) {
fprintf(stderr, "\"coa\" is invalid with proto=%s\n",
strxf_xfrmproto(req.xsinfo.id.proto));
exit(1);
}
} else {
if (xfrm_xfrmproto_is_ro(req.xsinfo.id.proto)) {
fprintf(stderr, "\"coa\" is required with proto=%s\n",
strxf_xfrmproto(req.xsinfo.id.proto));
exit (1);
}
}
if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
exit(1);
if (req.xsinfo.family == AF_UNSPEC)
req.xsinfo.family = AF_INET;
if (rtnl_talk(&rth, &req.n, 0, 0, NULL) < 0)
exit(2);
rtnl_close(&rth);
return 0;
}
static int xfrm_state_allocspi(int argc, char **argv)
{
struct rtnl_handle rth;
struct {
struct nlmsghdr n;
struct xfrm_userspi_info xspi;
char buf[RTA_BUF_SIZE];
} req;
char *idp = NULL;
char *minp = NULL;
char *maxp = NULL;
struct xfrm_mark mark = {0, 0};
char res_buf[NLMSG_BUF_SIZE];
struct nlmsghdr *res_n = (struct nlmsghdr *)res_buf;
memset(res_buf, 0, sizeof(res_buf));
memset(&req, 0, sizeof(req));
req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xspi));
req.n.nlmsg_flags = NLM_F_REQUEST;
req.n.nlmsg_type = XFRM_MSG_ALLOCSPI;
req.xspi.info.family = preferred_family;
#if 0
req.xsinfo.lft.soft_byte_limit = XFRM_INF;
req.xsinfo.lft.hard_byte_limit = XFRM_INF;
req.xsinfo.lft.soft_packet_limit = XFRM_INF;
req.xsinfo.lft.hard_packet_limit = XFRM_INF;
#endif
while (argc > 0) {
if (strcmp(*argv, "mode") == 0) {
NEXT_ARG();
xfrm_mode_parse(&req.xspi.info.mode, &argc, &argv);
} else if (strcmp(*argv, "mark") == 0) {
xfrm_parse_mark(&mark, &argc, &argv);
} else if (strcmp(*argv, "reqid") == 0) {
NEXT_ARG();
xfrm_reqid_parse(&req.xspi.info.reqid, &argc, &argv);
} else if (strcmp(*argv, "seq") == 0) {
NEXT_ARG();
xfrm_seq_parse(&req.xspi.info.seq, &argc, &argv);
} else if (strcmp(*argv, "min") == 0) {
if (minp)
duparg("min", *argv);
minp = *argv;
NEXT_ARG();
if (get_u32(&req.xspi.min, *argv, 0))
invarg("\"min\" value is invalid", *argv);
} else if (strcmp(*argv, "max") == 0) {
if (maxp)
duparg("max", *argv);
maxp = *argv;
NEXT_ARG();
if (get_u32(&req.xspi.max, *argv, 0))
invarg("\"max\" value is invalid", *argv);
} else {
/* try to assume ID */
if (idp)
invarg("unknown", *argv);
idp = *argv;
/* ID */
xfrm_id_parse(&req.xspi.info.saddr, &req.xspi.info.id,
&req.xspi.info.family, 0, &argc, &argv);
if (req.xspi.info.id.spi) {
fprintf(stderr, "\"SPI\" must be zero\n");
exit(1);
}
if (preferred_family == AF_UNSPEC)
preferred_family = req.xspi.info.family;
}
argc--; argv++;
}
if (!idp) {
fprintf(stderr, "Not enough information: \"ID\" is required\n");
exit(1);
}
if (minp) {
if (!maxp) {
fprintf(stderr, "\"max\" is missing\n");
exit(1);
}
if (req.xspi.min > req.xspi.max) {
fprintf(stderr, "\"min\" value is larger than \"max\" value\n");
exit(1);
}
} else {
if (maxp) {
fprintf(stderr, "\"min\" is missing\n");
exit(1);
}
/* XXX: Default value defined in PF_KEY;
* See kernel's net/key/af_key.c(pfkey_getspi).
*/
req.xspi.min = 0x100;
req.xspi.max = 0x0fffffff;
/* XXX: IPCOMP spi is 16-bits;
* See kernel's net/xfrm/xfrm_user(verify_userspi_info).
*/
if (req.xspi.info.id.proto == IPPROTO_COMP)
req.xspi.max = 0xffff;
}
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, "XFRMA_MARK failed\n");
exit(1);
}
}
if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
exit(1);
if (req.xspi.info.family == AF_UNSPEC)
req.xspi.info.family = AF_INET;
if (rtnl_talk(&rth, &req.n, 0, 0, res_n) < 0)
exit(2);
if (xfrm_state_print(NULL, res_n, (void*)stdout) < 0) {
fprintf(stderr, "An error :-)\n");
exit(1);
}
rtnl_close(&rth);
return 0;
}
static int xfrm_state_filter_match(struct xfrm_usersa_info *xsinfo)
{
if (!filter.use)
return 1;
if (filter.id_src_mask)
if (xfrm_addr_match(&xsinfo->saddr, &filter.xsinfo.saddr,
filter.id_src_mask))
return 0;
if (filter.id_dst_mask)
if (xfrm_addr_match(&xsinfo->id.daddr, &filter.xsinfo.id.daddr,
filter.id_dst_mask))
return 0;
if ((xsinfo->id.proto^filter.xsinfo.id.proto)&filter.id_proto_mask)
return 0;
if ((xsinfo->id.spi^filter.xsinfo.id.spi)&filter.id_spi_mask)
return 0;
if ((xsinfo->mode^filter.xsinfo.mode)&filter.mode_mask)
return 0;
if ((xsinfo->reqid^filter.xsinfo.reqid)&filter.reqid_mask)
return 0;
if (filter.state_flags_mask)
if ((xsinfo->flags & filter.xsinfo.flags) == 0)
return 0;
return 1;
}
int xfrm_state_print(const struct sockaddr_nl *who, struct nlmsghdr *n,
void *arg)
{
FILE *fp = (FILE*)arg;
struct rtattr * tb[XFRMA_MAX+1];
struct rtattr * rta;
struct xfrm_usersa_info *xsinfo = NULL;
struct xfrm_user_expire *xexp = NULL;
struct xfrm_usersa_id *xsid = NULL;
int len = n->nlmsg_len;
if (n->nlmsg_type != XFRM_MSG_NEWSA &&
n->nlmsg_type != XFRM_MSG_DELSA &&
n->nlmsg_type != XFRM_MSG_UPDSA &&
n->nlmsg_type != XFRM_MSG_EXPIRE) {
fprintf(stderr, "Not a state: %08x %08x %08x\n",
n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
return 0;
}
if (n->nlmsg_type == XFRM_MSG_DELSA) {
/* Dont blame me for this .. Herbert made me do it */
xsid = NLMSG_DATA(n);
len -= NLMSG_SPACE(sizeof(*xsid));
} else if (n->nlmsg_type == XFRM_MSG_EXPIRE) {
xexp = NLMSG_DATA(n);
xsinfo = &xexp->state;
len -= NLMSG_SPACE(sizeof(*xexp));
} else {
xexp = NULL;
xsinfo = NLMSG_DATA(n);
len -= NLMSG_SPACE(sizeof(*xsinfo));
}
if (len < 0) {
fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
return -1;
}
if (xsinfo && !xfrm_state_filter_match(xsinfo))
return 0;
if (n->nlmsg_type == XFRM_MSG_DELSA)
fprintf(fp, "Deleted ");
else if (n->nlmsg_type == XFRM_MSG_UPDSA)
fprintf(fp, "Updated ");
else if (n->nlmsg_type == XFRM_MSG_EXPIRE)
fprintf(fp, "Expired ");
if (n->nlmsg_type == XFRM_MSG_DELSA)
rta = XFRMSID_RTA(xsid);
else if (n->nlmsg_type == XFRM_MSG_EXPIRE)
rta = XFRMEXP_RTA(xexp);
else
rta = XFRMS_RTA(xsinfo);
parse_rtattr(tb, XFRMA_MAX, rta, len);
if (n->nlmsg_type == XFRM_MSG_DELSA) {
//xfrm_policy_id_print();
if (!tb[XFRMA_SA]) {
fprintf(stderr, "Buggy XFRM_MSG_DELSA: no XFRMA_SA\n");
return -1;
}
if (RTA_PAYLOAD(tb[XFRMA_SA]) < sizeof(*xsinfo)) {
fprintf(stderr, "Buggy XFRM_MSG_DELPOLICY: too short XFRMA_POLICY len\n");
return -1;
}
xsinfo = RTA_DATA(tb[XFRMA_SA]);
}
xfrm_state_info_print(xsinfo, tb, fp, NULL, NULL);
if (n->nlmsg_type == XFRM_MSG_EXPIRE) {
fprintf(fp, "\t");
fprintf(fp, "hard %u", xexp->hard);
fprintf(fp, "%s", _SL_);
}
if (oneline)
fprintf(fp, "\n");
fflush(fp);
return 0;
}
static int xfrm_state_get_or_delete(int argc, char **argv, int delete)
{
struct rtnl_handle rth;
struct {
struct nlmsghdr n;
struct xfrm_usersa_id xsid;
char buf[RTA_BUF_SIZE];
} req;
struct xfrm_id id;
char *idp = NULL;
struct xfrm_mark mark = {0, 0};
memset(&req, 0, sizeof(req));
req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsid));
req.n.nlmsg_flags = NLM_F_REQUEST;
req.n.nlmsg_type = delete ? XFRM_MSG_DELSA : XFRM_MSG_GETSA;
req.xsid.family = preferred_family;
while (argc > 0) {
xfrm_address_t saddr;
if (strcmp(*argv, "mark") == 0) {
xfrm_parse_mark(&mark, &argc, &argv);
} else {
if (idp)
invarg("unknown", *argv);
idp = *argv;
/* ID */
memset(&id, 0, sizeof(id));
memset(&saddr, 0, sizeof(saddr));
xfrm_id_parse(&saddr, &id, &req.xsid.family, 0,
&argc, &argv);
memcpy(&req.xsid.daddr, &id.daddr, sizeof(req.xsid.daddr));
req.xsid.spi = id.spi;
req.xsid.proto = id.proto;
addattr_l(&req.n, sizeof(req.buf), XFRMA_SRCADDR,
(void *)&saddr, sizeof(saddr));
}
argc--; argv++;
}
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, "XFRMA_MARK failed\n");
exit(1);
}
}
if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
exit(1);
if (req.xsid.family == AF_UNSPEC)
req.xsid.family = AF_INET;
if (delete) {
if (rtnl_talk(&rth, &req.n, 0, 0, NULL) < 0)
exit(2);
} else {
char buf[NLMSG_BUF_SIZE];
struct nlmsghdr *res_n = (struct nlmsghdr *)buf;
memset(buf, 0, sizeof(buf));
if (rtnl_talk(&rth, &req.n, 0, 0, res_n) < 0)
exit(2);
if (xfrm_state_print(NULL, res_n, (void*)stdout) < 0) {
fprintf(stderr, "An error :-)\n");
exit(1);
}
}
rtnl_close(&rth);
return 0;
}
/*
* With an existing state of nlmsg, make new nlmsg for deleting the state
* and store it to buffer.
*/
static int xfrm_state_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_usersa_info *xsinfo = NLMSG_DATA(n);
int len = n->nlmsg_len;
struct nlmsghdr *new_n;
struct xfrm_usersa_id *xsid;
if (n->nlmsg_type != XFRM_MSG_NEWSA) {
fprintf(stderr, "Not a state: %08x %08x %08x\n",
n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
return 0;
}
len -= NLMSG_LENGTH(sizeof(*xsinfo));
if (len < 0) {
fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
return -1;
}
if (!xfrm_state_filter_match(xsinfo))
return 0;
if (xb->offset > xb->size) {
fprintf(stderr, "State buffer overflow\n");
return -1;
}
new_n = (struct nlmsghdr *)(xb->buf + xb->offset);
new_n->nlmsg_len = NLMSG_LENGTH(sizeof(*xsid));
new_n->nlmsg_flags = NLM_F_REQUEST;
new_n->nlmsg_type = XFRM_MSG_DELSA;
new_n->nlmsg_seq = ++rth->seq;
xsid = NLMSG_DATA(new_n);
xsid->family = xsinfo->family;
memcpy(&xsid->daddr, &xsinfo->id.daddr, sizeof(xsid->daddr));
xsid->spi = xsinfo->id.spi;
xsid->proto = xsinfo->id.proto;
addattr_l(new_n, xb->size, XFRMA_SRCADDR, &xsinfo->saddr,
sizeof(xsid->daddr));
xb->offset += new_n->nlmsg_len;
xb->nlmsg_count ++;
return 0;
}
static int xfrm_state_list_or_deleteall(int argc, char **argv, int deleteall)
{
char *idp = NULL;
struct rtnl_handle rth;
if(argc > 0)
filter.use = 1;
filter.xsinfo.family = preferred_family;
while (argc > 0) {
if (strcmp(*argv, "mode") == 0) {
NEXT_ARG();
xfrm_mode_parse(&filter.xsinfo.mode, &argc, &argv);
filter.mode_mask = XFRM_FILTER_MASK_FULL;
} else if (strcmp(*argv, "reqid") == 0) {
NEXT_ARG();
xfrm_reqid_parse(&filter.xsinfo.reqid, &argc, &argv);
filter.reqid_mask = XFRM_FILTER_MASK_FULL;
} else if (strcmp(*argv, "flag") == 0) {
NEXT_ARG();
xfrm_state_flag_parse(&filter.xsinfo.flags, &argc, &argv);
filter.state_flags_mask = XFRM_FILTER_MASK_FULL;
} else {
if (idp)
invarg("unknown", *argv);
idp = *argv;
/* ID */
xfrm_id_parse(&filter.xsinfo.saddr, &filter.xsinfo.id,
&filter.xsinfo.family, 1, &argc, &argv);
if (preferred_family == AF_UNSPEC)
preferred_family = filter.xsinfo.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++) {
xb.offset = 0;
xb.nlmsg_count = 0;
if (show_stats > 1)
fprintf(stderr, "Delete-all round = %d\n", i);
if (rtnl_wilddump_request(&rth, preferred_family, XFRM_MSG_GETSA) < 0) {
perror("Cannot send dump request");
exit(1);
}
if (rtnl_dump_filter(&rth, xfrm_state_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\n");
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 {
if (rtnl_wilddump_request(&rth, preferred_family, XFRM_MSG_GETSA) < 0) {
perror("Cannot send dump request");
exit(1);
}
if (rtnl_dump_filter(&rth, xfrm_state_print, stdout) < 0) {
fprintf(stderr, "Dump terminated\n");
exit(1);
}
}
rtnl_close(&rth);
exit(0);
}
int print_sadinfo(struct nlmsghdr *n, void *arg)
{
FILE *fp = (FILE*)arg;
__u32 *f = NLMSG_DATA(n);
struct rtattr *tb[XFRMA_SAD_MAX+1];
struct rtattr *rta;
__u32 *cnt;
int len = n->nlmsg_len;
len -= NLMSG_LENGTH(sizeof(__u32));
if (len < 0) {
fprintf(stderr, "SADinfo: Wrong len %d\n", len);
return -1;
}
rta = XFRMSAPD_RTA(f);
parse_rtattr(tb, XFRMA_SAD_MAX, rta, len);
if (tb[XFRMA_SAD_CNT]) {
fprintf(fp,"\t SAD");
cnt = (__u32 *)RTA_DATA(tb[XFRMA_SAD_CNT]);
fprintf(fp," count %d", *cnt);
} else {
fprintf(fp,"BAD SAD info returned\n");
return -1;
}
if (show_stats) {
if (tb[XFRMA_SAD_HINFO]) {
struct xfrmu_sadhinfo *si;
if (RTA_PAYLOAD(tb[XFRMA_SAD_HINFO]) < sizeof(*si)) {
fprintf(fp,"BAD SAD length returned\n");
return -1;
}
si = RTA_DATA(tb[XFRMA_SAD_HINFO]);
fprintf(fp," (buckets ");
fprintf(fp,"count %d", si->sadhcnt);
fprintf(fp," Max %d", si->sadhmcnt);
fprintf(fp,")");
}
}
fprintf(fp,"\n");
return 0;
}
static int xfrm_sad_getinfo(int argc, char **argv)
{
struct rtnl_handle rth;
struct {
struct nlmsghdr n;
__u32 flags;
char ans[64];
} req;
memset(&req, 0, sizeof(req));
req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.flags));
req.n.nlmsg_flags = NLM_F_REQUEST;
req.n.nlmsg_type = XFRM_MSG_GETSADINFO;
req.flags = 0XFFFFFFFF;
if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
exit(1);
if (rtnl_talk(&rth, &req.n, 0, 0, &req.n) < 0)
exit(2);
print_sadinfo(&req.n, (void*)stdout);
rtnl_close(&rth);
return 0;
}
static int xfrm_state_flush(int argc, char **argv)
{
struct rtnl_handle rth;
struct {
struct nlmsghdr n;
struct xfrm_usersa_flush xsf;
} req;
char *protop = NULL;
memset(&req, 0, sizeof(req));
req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xsf));
req.n.nlmsg_flags = NLM_F_REQUEST;
req.n.nlmsg_type = XFRM_MSG_FLUSHSA;
req.xsf.proto = 0;
while (argc > 0) {
if (strcmp(*argv, "proto") == 0) {
int ret;
if (protop)
duparg("proto", *argv);
protop = *argv;
NEXT_ARG();
ret = xfrm_xfrmproto_getbyname(*argv);
if (ret < 0)
invarg("\"XFRM-PROTO\" is invalid", *argv);
req.xsf.proto = (__u8)ret;
} else
invarg("unknown", *argv);
argc--; argv++;
}
if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
exit(1);
if (show_stats > 1)
fprintf(stderr, "Flush state proto=%s\n",
strxf_xfrmproto(req.xsf.proto));
if (rtnl_talk(&rth, &req.n, 0, 0, NULL) < 0)
exit(2);
rtnl_close(&rth);
return 0;
}
int do_xfrm_state(int argc, char **argv)
{
if (argc < 1)
return xfrm_state_list_or_deleteall(0, NULL, 0);
if (matches(*argv, "add") == 0)
return xfrm_state_modify(XFRM_MSG_NEWSA, 0,
argc-1, argv+1);
if (matches(*argv, "update") == 0)
return xfrm_state_modify(XFRM_MSG_UPDSA, 0,
argc-1, argv+1);
if (matches(*argv, "allocspi") == 0)
return xfrm_state_allocspi(argc-1, argv+1);
if (matches(*argv, "delete") == 0)
return xfrm_state_get_or_delete(argc-1, argv+1, 1);
if (matches(*argv, "deleteall") == 0 || matches(*argv, "delall") == 0)
return xfrm_state_list_or_deleteall(argc-1, argv+1, 1);
if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
|| matches(*argv, "lst") == 0)
return xfrm_state_list_or_deleteall(argc-1, argv+1, 0);
if (matches(*argv, "get") == 0)
return xfrm_state_get_or_delete(argc-1, argv+1, 0);
if (matches(*argv, "flush") == 0)
return xfrm_state_flush(argc-1, argv+1);
if (matches(*argv, "count") == 0) {
return xfrm_sad_getinfo(argc, argv);
}
if (matches(*argv, "help") == 0)
usage();
fprintf(stderr, "Command \"%s\" is unknown, try \"ip xfrm state help\".\n", *argv);
exit(-1);
}