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Import patch ipxfrm-20040707_2.diff

Browse Source 
(Logical change 1.53)
This commit is contained in:
net[shemminger]!shemminger 2004-07-07 17:05:56 +00:00
parent 7798b5237e
commit c7699875be
11 changed files with 2284 additions and 15 deletions
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2
include/libnetlink.h
View File

@ -15,6 +15,7 @@ struct rtnl_handle
};
extern int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions);
extern int rtnl_open_byproto(struct rtnl_handle *rth, unsigned subscriptions, int protocol);
extern void rtnl_close(struct rtnl_handle *rth);
extern int rtnl_wilddump_request(struct rtnl_handle *rth, int fam, int type);
extern int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req, int len);
@ -36,6 +37,7 @@ extern int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data);
extern int rta_addattr_l(struct rtattr *rta, int maxlen, int type, void *data, int alen);
extern int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len);
extern int parse_rtattr_byindex(struct rtattr *tb[], int max, struct rtattr *rta, int len);
extern int rtnl_listen(struct rtnl_handle *, int (*handler)(struct sockaddr_nl *,struct nlmsghdr *n, void *),
void *jarg);

15
include/utils.h
View File

@ -22,6 +22,9 @@ extern char * _SL_;
#ifndef IPPROTO_AH
#define IPPROTO_AH 51
#endif
#ifndef IPPROTO_COMP
#define IPPROTO_COMP 108
#endif
#define SPRINT_BSIZE 64
#define SPRINT_BUF(x) char x[SPRINT_BSIZE]
@ -29,6 +32,8 @@ extern char * _SL_;
extern void incomplete_command(void) __attribute__((noreturn));
#define NEXT_ARG() do { argv++; if (--argc <= 0) incomplete_command(); } while(0)
#define NEXT_ARG_OK() (argc - 1 > 0)
#define PREV_ARG() do { argv--; argc++; } while(0)
typedef struct
{
@ -56,17 +61,18 @@ struct ipx_addr {
u_int8_t ipx_node[IPX_NODE_LEN];
};
extern __u32 get_addr32(char *name);
extern __u32 get_addr32(const char *name);
extern int get_addr_1(inet_prefix *dst, const char *arg, int family);
extern int get_prefix_1(inet_prefix *dst, char *arg, int family);
extern int get_addr(inet_prefix *dst, char *arg, int family);
extern int get_prefix(inet_prefix *dst, char *arg, int family);
extern int get_prefix_1(inet_prefix *dst, const char *arg, int family);
extern int get_addr(inet_prefix *dst, const char *arg, int family);
extern int get_prefix(inet_prefix *dst, const char *arg, int family);
extern int get_integer(int *val, const char *arg, int base);
extern int get_unsigned(unsigned *val, const char *arg, int base);
#define get_byte get_u8
#define get_ushort get_u16
#define get_short get_s16
extern int get_u64(__u64 *val, const char *arg, int base);
extern int get_u32(__u32 *val, const char *arg, int base);
extern int get_u16(__u16 *val, const char *arg, int base);
extern int get_s16(__s16 *val, const char *arg, int base);
@ -81,6 +87,7 @@ extern const char *format_host(int af, int len, const void *addr,
extern const char *rt_addr_n2a(int af, int len, const void *addr,
char *buf, int buflen);
void missarg(const char *) __attribute__((noreturn));
void invarg(const char *, const char *) __attribute__((noreturn));
void duparg(const char *, const char *) __attribute__((noreturn));
void duparg2(const char *, const char *) __attribute__((noreturn));

2
ip/Makefile
View File

@ -1,6 +1,6 @@
IPOBJ=ip.o ipaddress.o iproute.o iprule.o \
rtm_map.o iptunnel.o ipneigh.o iplink.o ipmaddr.o \
ipmonitor.o ipmroute.o
ipmonitor.o ipmroute.o ipxfrm.o xfrm_state.o xfrm_policy.o
RTMONOBJ=rtmon.o

6
ip/ip.c
View File

@ -40,7 +40,7 @@ static void usage(void)
fprintf(stderr,
"Usage: ip [ OPTIONS ] OBJECT { COMMAND | help }\n"
"where OBJECT := { link | addr | route | rule | neigh | tunnel |\n"
" maddr | mroute | monitor }\n"
" maddr | mroute | monitor | xfrm }\n"
" OPTIONS := { -V[ersion] | -s[tatistics] | -r[esolve] |\n"
" -f[amily] { inet | inet6 | ipx | dnet | link } | -o[neline] }\n");
exit(-1);
@ -136,6 +136,8 @@ int main(int argc, char **argv)
return do_iptunnel(argc-1, argv+1);
if (strcmp(basename, "ipmonitor") == 0)
return do_ipmonitor(argc-1, argv+1);
if (strcmp(basename, "ipxfrm") == 0)
return do_xfrm(argc-1, argv+1);
if (argc > 1) {
if (matches(argv[1], "address") == 0)
@ -158,6 +160,8 @@ int main(int argc, char **argv)
return do_iptunnel(argc-2, argv+2);
if (matches(argv[1], "monitor") == 0)
return do_ipmonitor(argc-2, argv+2);
if (matches(argv[1], "xfrm") == 0)
return do_xfrm(argc-2, argv+2);
if (matches(argv[1], "help") == 0)
usage();
fprintf(stderr, "Object \"%s\" is unknown, try \"ip help\".\n", argv[1]);

1
ip/ip_common.h
View File

@ -18,3 +18,4 @@ extern int do_iplink(int argc, char **argv);
extern int do_ipmonitor(int argc, char **argv);
extern int do_multiaddr(int argc, char **argv);
extern int do_multiroute(int argc, char **argv);
extern int do_xfrm(int argc, char **argv);

808
ip/ipxfrm.c
View File

@ -0,0 +1,808 @@
/* $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 ip.c, iproute.c
*/
/*
* Authors:
* Masahide NAKAMURA @USAGI
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <time.h>
#include <netdb.h>
#include <net/if.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/xfrm.h>
#include "utils.h"
#include "xfrm.h"
struct xfrm_filter filter;
static void usage(void) __attribute__((noreturn));
static void usage(void)
{
fprintf(stderr,
"Usage: ip xfrm XFRM_OBJECT { COMMAND | help }\n"
"where XFRM_OBJECT := { state | policy }\n");
exit(-1);
}
const char *strxf_flags(__u8 flags)
{
static char str[16];
const int sn = sizeof(flags) * 8 - 1;
__u8 b;
int i = 0;
for (b = (1 << sn); b > 0; b >>= 1)
str[i++] = ((b & flags) ? '1' : '0');
str[i] = '\0';
return str;
}
const char *strxf_share(__u8 share)
{
static char str[32];
switch (share) {
case XFRM_SHARE_ANY:
strcpy(str, "any");
break;
case XFRM_SHARE_SESSION:
strcpy(str, "session");
break;
case XFRM_SHARE_USER:
strcpy(str, "user");
break;
case XFRM_SHARE_UNIQUE:
strcpy(str, "unique");
break;
default:
sprintf(str, "unknown-share(%d)", share);
break;
}
return str;
}
void xfrm_id_info_print(xfrm_address_t *saddr, struct xfrm_id *id,
__u8 mode, __u32 reqid, __u16 family, FILE *fp,
const char *prefix)
{
char abuf[256];
__u32 spi;
struct protoent *pp;
char pbuf[32];
char *p;
if (prefix)
fprintf(fp, prefix);
memset(abuf, '\0', sizeof(abuf));
fprintf(fp, "%s ", rt_addr_n2a(family, sizeof(*saddr),
saddr, abuf, sizeof(abuf)));
memset(abuf, '\0', sizeof(abuf));
fprintf(fp, "%s\n", rt_addr_n2a(family, sizeof(id->daddr),
&id->daddr, abuf, sizeof(abuf)));
if (prefix)
fprintf(fp, prefix);
fprintf(fp, "\t");
pp = getprotobynumber(id->proto);
if (pp)
p = pp->p_name;
else {
sprintf(pbuf, "%d", id->proto);
p = pbuf;
}
switch (id->proto) {
case IPPROTO_ESP:
case IPPROTO_AH:
case IPPROTO_COMP:
fprintf(fp, "%s ", p);
break;
default:
fprintf(fp, "unspec(%s)", p);
break;
}
switch (id->proto) {
case IPPROTO_ESP:
case IPPROTO_AH:
case IPPROTO_COMP:
default:
spi = ntohl(id->spi);
fprintf(fp, "spi %d(0x%08x) ", spi, spi);
break;
}
fprintf(fp, "reqid %d ", reqid);
fprintf(fp, "%s\n", (mode ? "tunnel" : "transport"));
}
static const char *strxf_limit(__u64 limit)
{
static char str[32];
if (limit == XFRM_INF)
strcpy(str, "(INF)");
else
sprintf(str, "%llu", limit);
return str;
}
void xfrm_stats_print(struct xfrm_stats *s, FILE *fp, const char *prefix)
{
if (prefix)
fprintf(fp, prefix);
fprintf(fp, "stats:\n");
if (prefix)
fprintf(fp, prefix);
fprintf(fp, " ");
fprintf(fp, "replay-window %d ", s->replay_window);
fprintf(fp, "replay %d ", s->replay);
fprintf(fp, "failed %d", s->integrity_failed);
fprintf(fp, "\n");
}
static const char *strxf_time(__u64 time)
{
static char str[32];
struct tm *tp;
time_t t;
if (time == 0) {
strcpy(str, "(undefined)");
} else {
/* XXX: treat time in the same manner of xfrm_{user,state}.c */
t = (long)time;
tp = localtime(&t);
sprintf(str, "%04d/%02d/%02d %02d:%02d:%02d",
tp->tm_year + 1900, tp->tm_mon + 1, tp->tm_mday,
tp->tm_hour, tp->tm_min, tp->tm_sec);
}
return str;
}
void xfrm_lifetime_print(struct xfrm_lifetime_cfg *cfg,
struct xfrm_lifetime_cur *cur,
FILE *fp, const char *prefix)
{
if (cfg) {
if (prefix)
fprintf(fp, prefix);
fprintf(fp, "lifetime config:\n");
if (prefix)
fprintf(fp, prefix);
fprintf(fp, " ");
fprintf(fp, "limit: ");
fprintf(fp, "soft ");
fprintf(fp, strxf_limit(cfg->soft_byte_limit));
fprintf(fp, "(bytes), hard ");
fprintf(fp, strxf_limit(cfg->hard_byte_limit));
fprintf(fp, "(bytes)\n");
if (prefix)
fprintf(fp, prefix);
fprintf(fp, " ");
fprintf(fp, "limit: ");
fprintf(fp, "soft ");
fprintf(fp, strxf_limit(cfg->soft_packet_limit));
fprintf(fp, "(packets), hard ");
fprintf(fp, strxf_limit(cfg->hard_packet_limit));
fprintf(fp, "(packets)\n");
if (prefix)
fprintf(fp, prefix);
fprintf(fp, " ");
fprintf(fp, "expire add: ");
fprintf(fp, "soft ");
fprintf(fp, "%llu", cfg->soft_add_expires_seconds);
fprintf(fp, "(sec), hard ");
fprintf(fp, "%llu", cfg->hard_add_expires_seconds);
fprintf(fp, "(sec)\n");
if (prefix)
fprintf(fp, prefix);
fprintf(fp, " ");
fprintf(fp, "expire use: ");
fprintf(fp, "soft ");
fprintf(fp, "%llu", cfg->soft_use_expires_seconds);
fprintf(fp, "(sec), hard ");
fprintf(fp, "%llu", cfg->hard_use_expires_seconds);
fprintf(fp, "(sec)\n");
}
if (cur) {
if (prefix)
fprintf(fp, prefix);
fprintf(fp, "lifetime current:\n");
if (prefix)
fprintf(fp, prefix);
fprintf(fp, " ");
fprintf(fp, "%llu(bytes), ", cur->bytes);
fprintf(fp, "%llu(packets)\n", cur->packets);
if (prefix)
fprintf(fp, prefix);
fprintf(fp, " ");
fprintf(fp, "add %s ", strxf_time(cur->add_time));
fprintf(fp, "use %s", strxf_time(cur->use_time));
fprintf(fp, "\n");
}
}
void xfrm_selector_print(struct xfrm_selector *sel, __u16 family,
FILE *fp, const char *prefix)
{
char abuf[256];
__u16 f;
f = sel->family;
if (f == AF_UNSPEC)
f = family;
if (f == AF_UNSPEC)
f = preferred_family;
if (prefix)
fprintf(fp, prefix);
memset(abuf, '\0', sizeof(abuf));
fprintf(fp, "%s/%d[%u]", rt_addr_n2a(f, sizeof(sel->saddr),
&sel->saddr,
abuf, sizeof(abuf)),
sel->prefixlen_s, sel->sport);
memset(abuf, '\0', sizeof(abuf));
fprintf(fp, " %s/%d[%u]", rt_addr_n2a(f, sizeof(sel->daddr),
&sel->daddr,
abuf, sizeof(abuf)),
sel->prefixlen_d, sel->dport);
fprintf(fp, "\n");
if (prefix)
fprintf(fp, prefix);
fprintf(fp, "\t");
fprintf(fp, "upspec %u ", sel->proto);
if (sel->ifindex > 0) {
char buf[IF_NAMESIZE];
memset(buf, '\0', sizeof(buf));
if_indextoname(sel->ifindex, buf);
fprintf(fp, "dev %s ", buf);
} else
fprintf(fp, "dev (none) ");
fprintf(fp, "uid %u", sel->user);
fprintf(fp, "\n");
}
static void xfrm_algo_print(struct xfrm_algo *algo, FILE *fp,
const char *prefix)
{
int len;
int i;
if (prefix)
fprintf(fp, prefix);
fprintf(fp, "%s", algo->alg_name);
len = algo->alg_key_len / 8;
for (i = 0; i < len; i ++) {
if (i % 4 == 0)
fprintf(fp, " ");
fprintf(fp, "%x", algo->alg_key[i]);
}
fprintf(fp, "\n");
}
static const char *strxf_mask(__u32 mask)
{
static char str[128];
const int sn = sizeof(mask) * 8 - 1;
__u32 b;
int finish = 0;
int broken = 0;
int i = 0;
for (b = (1 << sn); b > 0; b >>= 1) {
if ((b & mask) == 0) {
if (!finish)
finish = 1;
} else {
if (!finish)
i ++;
else {
broken = 1;
break;
}
}
}
if (!broken)
sprintf(str, "%u", i);
else
sprintf(str, "broken(%u)", mask);
return str;
}
static void xfrm_tmpl_print(struct xfrm_user_tmpl *tmpls, int ntmpls,
__u16 family, FILE *fp, const char *prefix)
{
char buf[32];
const char *p = NULL;
int i;
if (prefix) {
strcpy(buf, prefix);
strcat(buf, " ");
} else
strcpy(buf, " ");
p = buf;
for (i = 0; i < ntmpls; i++) {
struct xfrm_user_tmpl *tmpl = &tmpls[i];
if (prefix)
fprintf(fp, prefix);
fprintf(fp, "tmpl-%d:\n", i+1);
xfrm_id_info_print(&tmpl->saddr, &tmpl->id, tmpl->mode,
tmpl->reqid, family, fp, p);
fprintf(fp, p);
fprintf(fp, "\t");
fprintf(fp, "level %s ", ((tmpl->optional == 0) ? "required" :
(tmpl->optional == 1) ? "use" :
"unknown-level"));
fprintf(fp, "share %s ", strxf_share(tmpl->share));
fprintf(fp, "algo-mask:");
fprintf(fp, "E=%s, ", strxf_mask(tmpl->ealgos));
fprintf(fp, "A=%s, ", strxf_mask(tmpl->aalgos));
fprintf(fp, "C=%s", strxf_mask(tmpl->calgos));
fprintf(fp, "\n");
}
}
void xfrm_xfrma_print(struct rtattr *tb[], int ntb, __u16 family,
FILE *fp, const char *prefix)
{
int i;
for (i = 0; i < ntb; i++) {
__u16 type = tb[i]->rta_type;
void *data = RTA_DATA(tb[i]);
switch (type) {
case XFRMA_ALG_CRYPT:
if (prefix)
fprintf(fp, prefix);
xfrm_algo_print((struct xfrm_algo *)data, fp, "E:");
break;
case XFRMA_ALG_AUTH:
if (prefix)
fprintf(fp, prefix);
xfrm_algo_print((struct xfrm_algo *)data, fp, "A:");
break;
case XFRMA_ALG_COMP:
if (prefix)
fprintf(fp, prefix);
xfrm_algo_print((struct xfrm_algo *)data, fp, "C:");
break;
case XFRMA_ENCAP:
if (prefix)
fprintf(fp, prefix);
/* XXX */
fprintf(fp, "encap: (not implemented yet!)\n");
break;
case XFRMA_TMPL:
{
int len = tb[i]->rta_len;
int ntmpls = len / sizeof(struct xfrm_user_tmpl);
xfrm_tmpl_print((struct xfrm_user_tmpl *)data,
ntmpls, family, fp, prefix);
break;
}
default:
if (prefix)
fprintf(fp, prefix);
fprintf(fp, "unknown rta_type: %u\n", type);
break;
}
}
}
int xfrm_id_parse(xfrm_address_t *saddr, struct xfrm_id *id, __u16 *family,
int *argcp, char ***argvp)
{
int argc = *argcp;
char **argv = *argvp;
inet_prefix dst;
inet_prefix src;
__u8 proto = 0;
memset(&dst, 0, sizeof(dst));
memset(&src, 0, sizeof(src));
while (1) {
if (strcmp(*argv, "src") == 0) {
NEXT_ARG();
get_prefix(&src, *argv, preferred_family);
if (src.family == AF_UNSPEC)
invarg("\"SADDR\" address family is AF_UNSPEC", *argv);
if (family)
*family = src.family;
memcpy(saddr, &src.data, sizeof(*saddr));
filter.id_src_mask = src.bitlen;
} else if (strcmp(*argv, "dst") == 0) {
NEXT_ARG();
get_prefix(&dst, *argv, preferred_family);
if (dst.family == AF_UNSPEC)
invarg("\"DADDR\" address family is AF_UNSPEC", *argv);
if (family)
*family = dst.family;
memcpy(&id->daddr, &dst.data, sizeof(id->daddr));
filter.id_dst_mask = dst.bitlen;
} else if (strcmp(*argv, "proto") == 0) {
struct protoent *pp;
NEXT_ARG();
pp = getprotobyname(*argv);
if (pp)
proto = pp->p_proto;
else {
if (get_u8(&proto, *argv, 0))
invarg("\"PROTO\" is invalid", *argv);
}
switch (proto) {
case IPPROTO_ESP:
case IPPROTO_AH:
case IPPROTO_COMP:
id->proto = proto;
break;
default:
invarg("\"PROTO\" is unsuppored proto", *argv);
}
filter.id_proto_mask = XFRM_FILTER_MASK_FULL;
} else if (strcmp(*argv, "spi") == 0) {
__u32 spi;
NEXT_ARG();
if (get_u32(&spi, *argv, 0))
invarg("\"SPI\" is invalid", *argv);
spi = htonl(spi);
id->spi = spi;
filter.id_spi_mask = XFRM_FILTER_MASK_FULL;
} else {
PREV_ARG(); /* back track */
break;
}
if (!NEXT_ARG_OK())
break;
NEXT_ARG();
}
if (src.family && dst.family && (src.family != dst.family))
invarg("the same address family is required between \"SADDR\" and \"DADDR\"", *argv);
if (proto == 0)
missarg("PROTO");
if (argc == *argcp)
missarg("ID");
*argcp = argc;
*argvp = argv;
return 0;
}
int xfrm_mode_parse(__u8 *mode, int *argcp, char ***argvp)
{
int argc = *argcp;
char **argv = *argvp;
if (matches(*argv, "transport") == 0)
*mode = 0;
else if (matches(*argv, "tunnel") == 0)
*mode = 1;
else
invarg("\"MODE\" is invalid", *argv);
*argcp = argc;
*argvp = argv;
return 0;
}
/* NOTE: reqid is used by host-byte order */
int xfrm_reqid_parse(__u32 *reqid, int *argcp, char ***argvp)
{
int argc = *argcp;
char **argv = *argvp;
if (get_u32(reqid, *argv, 0))
invarg("\"REQID\" is invalid", *argv);
*argcp = argc;
*argvp = argv;
return 0;
}
static int xfrm_selector_upspec_parse(struct xfrm_selector *sel,
int *argcp, char ***argvp)
{
int argc = *argcp;
char **argv = *argvp;
__u8 upspec;
while (1) {
if (strcmp(*argv, "proto") == 0) {
NEXT_ARG();
if (strcmp(*argv, "any") == 0)
upspec = 0;
else {
struct protoent *pp;
pp = getprotobyname(*argv);
if (pp)
upspec = pp->p_proto;
else {
if (get_u8(&upspec, *argv, 0))
invarg("\"UPSPEC\" is invalid", *argv);
}
}
sel->proto = upspec;
filter.upspec_proto_mask = XFRM_FILTER_MASK_FULL;
} else if (strcmp(*argv, "sport") == 0) {
NEXT_ARG();
if (get_u16(&sel->sport, *argv, 0))
invarg("\"PORT\" is invalid", *argv);
sel->sport = htons(sel->sport);
if (sel->sport)
sel->sport_mask = ~((__u16)0);
filter.upspec_sport_mask = XFRM_FILTER_MASK_FULL;
} else if (strcmp(*argv, "dport") == 0) {
NEXT_ARG();
if (get_u16(&sel->dport, *argv, 0))
invarg("\"PORT\" is invalid", *argv);
sel->dport = htons(sel->dport);
if (sel->dport)
sel->dport_mask = ~((__u16)0);
filter.upspec_dport_mask = XFRM_FILTER_MASK_FULL;
} else {
PREV_ARG(); /* back track */
break;
}
if (!NEXT_ARG_OK())
break;
NEXT_ARG();
}
if (argc == *argcp)
missarg("UPSPEC");
*argcp = argc;
*argvp = argv;
return 0;
}
int xfrm_selector_parse(struct xfrm_selector *sel, int *argcp, char ***argvp)
{
int argc = *argcp;
char **argv = *argvp;
inet_prefix dst;
inet_prefix src;
memset(&dst, 0, sizeof(dst));
memset(&src, 0, sizeof(src));
while (1) {
if (strcmp(*argv, "src") == 0) {
NEXT_ARG();
get_prefix(&src, *argv, preferred_family);
if (src.family == AF_UNSPEC)
invarg("\"SADDR\" address family is AF_UNSPEC", *argv);
sel->family = src.family;
memcpy(&sel->saddr, &src.data, sizeof(sel->saddr));
sel->prefixlen_s = src.bitlen;
filter.sel_src_mask = src.bitlen;
} else if (strcmp(*argv, "dst") == 0) {
NEXT_ARG();
get_prefix(&dst, *argv, preferred_family);
if (dst.family == AF_UNSPEC)
invarg("\"DADDR\" address family is AF_UNSPEC", *argv);
sel->family = dst.family;
memcpy(&sel->daddr, &dst.data, sizeof(sel->daddr));
sel->prefixlen_d = dst.bitlen;
filter.sel_dst_mask = dst.bitlen;
} else if (strcmp(*argv, "upspec") == 0) {
NEXT_ARG();
xfrm_selector_upspec_parse(sel, &argc, &argv);
} else if (strcmp(*argv, "dev") == 0) {
int ifindex;
NEXT_ARG();
if (strcmp(*argv, "none") == 0)
ifindex = 0;
else {
ifindex = if_nametoindex(*argv);
if (ifindex <= 0)
invarg("\"DEV\" is invalid", *argv);
}
sel->ifindex = ifindex;
filter.sel_dev_mask = XFRM_FILTER_MASK_FULL;
} else {
PREV_ARG(); /* back track */
break;
}
if (!NEXT_ARG_OK())
break;
NEXT_ARG();
}
if (src.family && dst.family && (src.family != dst.family))
invarg("the same address family is required between \"SADDR\" and \"DADDR\"", *argv);
if (argc == *argcp)
missarg("SELECTOR");
*argcp = argc;
*argvp = argv;
return 0;
}
int xfrm_lifetime_cfg_parse(struct xfrm_lifetime_cfg *lft,
int *argcp, char ***argvp)
{
int argc = *argcp;
char **argv = *argvp;
int ret;
if (strcmp(*argv, "time-soft") == 0) {
NEXT_ARG();
ret = get_u64(&lft->soft_add_expires_seconds, *argv, 0);
if (ret)
invarg("\"time-soft\" value is invalid", *argv);
} else if (strcmp(*argv, "time-hard") == 0) {
NEXT_ARG();
ret = get_u64(&lft->hard_add_expires_seconds, *argv, 0);
if (ret)
invarg("\"time-hard\" value is invalid", *argv);
} else if (strcmp(*argv, "time-use-soft") == 0) {
NEXT_ARG();
ret = get_u64(&lft->soft_use_expires_seconds, *argv, 0);
if (ret)
invarg("\"time-use-soft\" value is invalid", *argv);
} else if (strcmp(*argv, "time-use-hard") == 0) {
NEXT_ARG();
ret = get_u64(&lft->hard_use_expires_seconds, *argv, 0);
if (ret)
invarg("\"time-use-hard\" value is invalid", *argv);
} else if (strcmp(*argv, "byte-soft") == 0) {
NEXT_ARG();
ret = get_u64(&lft->soft_byte_limit, *argv, 0);
if (ret)
invarg("\"byte-soft\" value is invalid", *argv);
} else if (strcmp(*argv, "byte-hard") == 0) {
NEXT_ARG();
ret = get_u64(&lft->hard_byte_limit, *argv, 0);
if (ret)
invarg("\"byte-hard\" value is invalid", *argv);
} else if (strcmp(*argv, "packet-soft") == 0) {
NEXT_ARG();
ret = get_u64(&lft->soft_packet_limit, *argv, 0);
if (ret)
invarg("\"packet-soft\" value is invalid", *argv);
} else if (strcmp(*argv, "packet-hard") == 0) {
NEXT_ARG();
ret = get_u64(&lft->hard_packet_limit, *argv, 0);
if (ret)
invarg("\"packet-hard\" value is invalid", *argv);
} else
invarg("\"LIMIT\" is invalid", *argv);
*argcp = argc;
*argvp = argv;
return 0;
}
int do_xfrm(int argc, char **argv)
{
memset(&filter, 0, sizeof(filter));
if (argc < 1)
usage();
if (strcmp(*argv, "state") == 0 ||
strcmp(*argv, "sa") == 0) {
return do_xfrm_state(argc-1, argv+1);
} else if (strcmp(*argv, "policy") == 0 ||
strcmp(*argv, "pol") == 0) {
return do_xfrm_policy(argc-1, argv+1);
} else if (strcmp(*argv, "help") == 0) {
usage();
fprintf(stderr, "xfrm Object \"%s\" is unknown.\n", *argv);
exit(-1);
}
usage();
}

102
ip/xfrm.h
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@ -0,0 +1,102 @@
/* $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
*/
/*
* Authors:
* Masahide NAKAMURA @USAGI
*/
#ifndef __XFRM_H__
#define __XFRM_H__ 1
#include <stdio.h>
#include <sys/socket.h>
#include <linux/xfrm.h>
#include "utils.h"
#define XFRM_MAX_DEPTH 6
#define XFRMS_RTA(x) ((struct rtattr*)(((char*)(x)) + NLMSG_ALIGN(sizeof(struct xfrm_usersa_info))))
#define XFRMS_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct xfrm_usersa_info))
#define XFRMP_RTA(x) ((struct rtattr*)(((char*)(x)) + NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_info))))
#define XFRMP_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct xfrm_userpoilcy_info))
struct xfrm_buffer {
char *buf;
int size;
int offset;
int nlmsg_count;
struct rtnl_handle *rth;
};
struct xfrm_filter {
int use;
struct xfrm_usersa_info xsinfo;
__u32 id_src_mask;
__u32 id_dst_mask;
__u32 id_proto_mask;
__u32 id_spi_mask;
__u32 mode_mask;
__u32 reqid_mask;
__u32 state_flags_mask;
struct xfrm_userpolicy_info xpinfo;
__u32 dir_mask;
__u32 sel_src_mask;
__u32 sel_dst_mask;
__u32 sel_dev_mask;
__u32 upspec_proto_mask;
__u32 upspec_sport_mask;
__u32 upspec_dport_mask;
__u32 index_mask;
__u32 action_mask;
__u32 priority_mask;
};
#define XFRM_FILTER_MASK_FULL (~(__u32)0)
extern struct xfrm_filter filter;
int do_xfrm_state(int argc, char **argv);
int do_xfrm_policy(int argc, char **argv);
const char *strxf_flags(__u8 flags);
const char *strxf_share(__u8 share);
void xfrm_id_info_print(xfrm_address_t *saddr, struct xfrm_id *id,
__u8 mode, __u32 reqid, __u16 family, FILE *fp,
const char *prefix);
void xfrm_stats_print(struct xfrm_stats *s, FILE *fp, const char *prefix);
void xfrm_lifetime_print(struct xfrm_lifetime_cfg *cfg,
struct xfrm_lifetime_cur *cur,
FILE *fp, const char *prefix);
void xfrm_selector_print(struct xfrm_selector *sel, __u16 family,
FILE *fp, const char *prefix);
void xfrm_xfrma_print(struct rtattr *tb[], int ntb, __u16 family,
FILE *fp, const char *prefix);
int xfrm_id_parse(xfrm_address_t *saddr, struct xfrm_id *id, __u16 *family,
int *argcp, char ***argvp);
int xfrm_mode_parse(__u8 *mode, int *argcp, char ***argvp);
int xfrm_reqid_parse(__u32 *reqid, int *argcp, char ***argvp);
int xfrm_selector_parse(struct xfrm_selector *sel, int *argcp, char ***argvp);
int xfrm_lifetime_cfg_parse(struct xfrm_lifetime_cfg *lft,
int *argcp, char ***argvp);
#endif

671
ip/xfrm_policy.c
View File

@ -0,0 +1,671 @@
/* $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 <linux/netlink.h>
#include <linux/xfrm.h>
#include "utils.h"
#include "xfrm.h"
#include "ip_common.h"
//#define NLMSG_FLUSH_BUF_SIZE (4096-512)
#define NLMSG_FLUSH_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
static void usage(void) __attribute__((noreturn));
static void usage(void)
{
fprintf(stderr, "Usage: ip xfrm policy { add | update } dir DIR sel SELECTOR [ index INDEX ] \n");
fprintf(stderr, " [ action ACTION ] [ priority PRIORITY ] [ LIMIT-LIST ] [ TMPL-LIST ]\n");
fprintf(stderr, " [ sel SELECTOR | index INDEX ] [ TMPL-LIST ]\n");
fprintf(stderr, "Usage: ip xfrm policy { delete | get } dir DIR [ sel SELECTOR | index INDEX ]\n");
fprintf(stderr, "Usage: ip xfrm policy { flush | list } [ dir DIR ] [ sel SELECTOR ]\n");
fprintf(stderr, " [ index INDEX ] [ action ACTION ] [ priority PRIORITY ]\n");
fprintf(stderr, "DIR := [ in | out | fwd ]\n");
fprintf(stderr, "SELECTOR := src ADDR[/PLEN] dst ADDR[/PLEN] [ upspec UPSPEC ] [ dev DEV ]\n");
fprintf(stderr, "UPSPEC := proto PROTO [ sport PORT ] [ dport PORT ]\n");
//fprintf(stderr, "DEV - device name(default=none)\n");
fprintf(stderr, "ACTION := [ allow | block ](default=allow)\n");
//fprintf(stderr, "PRIORITY - priority value(default=0)\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] NUMBER ]\n");
fprintf(stderr, "TMPL-LIST := [ TMPL-LIST ] | [ tmpl TMPL ] | [ tmpl remain ](change only)\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 := [ esp | ah | ipcomp ]\n");
fprintf(stderr, "MODE := [ transport | tunnel ](default=transport)\n");
//fprintf(stderr, "REQID - number(default=0)\n");
fprintf(stderr, "LEVEL := [ required | use ](default=required)\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\" is invalid", *argv);
*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;
xfrm_id_parse(&tmpl->saddr, &tmpl->id, &tmpl->family,
&argc, &argv);
if (preferred_family == AF_UNSPEC)
preferred_family = tmpl->family;
}
if (!NEXT_ARG_OK())
break;
NEXT_ARG();
}
if (argc == *argcp)
missarg("TMPL");
*argcp = argc;
*argvp = argv;
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 tmpls_buf[XFRM_TMPLS_BUF_SIZE];
int tmpls_len = 0;
memset(&req, 0, sizeof(req));
memset(&tmpls_buf, 0, sizeof(tmpls_buf));
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);
filter.dir_mask = XFRM_FILTER_MASK_FULL;
} else if (strcmp(*argv, "sel") == 0) {
NEXT_ARG();
xfrm_selector_parse(&req.xpinfo.sel, &argc, &argv);
if (preferred_family == AF_UNSPEC)
preferred_family = req.xpinfo.sel.family;
} else if (strcmp(*argv, "index") == 0) {
NEXT_ARG();
if (get_u32(&req.xpinfo.index, *argv, 0))
invarg("\"INDEX\" is invalid", *argv);
filter.index_mask = XFRM_FILTER_MASK_FULL;
} 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);
filter.action_mask = XFRM_FILTER_MASK_FULL;
} else if (strcmp(*argv, "priority") == 0) {
NEXT_ARG();
if (get_u32(&req.xpinfo.priority, *argv, 0))
invarg("\"PRIORITY\" is invalid", *argv);
filter.priority_mask = XFRM_FILTER_MASK_FULL;
} 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
invarg("unknown", *argv);
argc--; argv++;
}
if (!dirp) {
fprintf(stderr, "Not enough information: \"DIR\" is required.\n");
exit(1);
}
if (tmpls_len > 0) {
addattr_l(&req.n, sizeof(req), XFRMA_TMPL,
(void *)tmpls_buf, tmpls_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, 0, 0, NULL, NULL, NULL) < 0)
exit(2);
rtnl_close(&rth);
return 0;
}
static int xfrm_policy_filter_match(struct xfrm_userpolicy_info *xpinfo)
{
if (!filter.use)
return 1;
if ((xpinfo->dir^filter.xpinfo.dir)&filter.dir_mask)
return 0;
if (filter.sel_src_mask) {
if (memcmp(&xpinfo->sel.saddr, &filter.xpinfo.sel.saddr,
filter.sel_src_mask) != 0)
return 0;
if (xpinfo->sel.prefixlen_s != filter.xpinfo.sel.prefixlen_s)
return 0;
}
if (filter.sel_dst_mask) {
if (memcmp(&xpinfo->sel.daddr, &filter.xpinfo.sel.daddr,
filter.sel_dst_mask) != 0)
return 0;
if (xpinfo->sel.prefixlen_d != filter.xpinfo.sel.prefixlen_d)
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;
return 1;
}
int xfrm_policy_print(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
{
FILE *fp = (FILE*)arg;
struct xfrm_userpolicy_info *xpinfo = NLMSG_DATA(n);
int len = n->nlmsg_len;
struct rtattr * tb[XFRM_MAX_DEPTH];
int ntb;
if (n->nlmsg_type != XFRM_MSG_NEWPOLICY &&
n->nlmsg_type != XFRM_MSG_DELPOLICY) {
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;
}
if (!xfrm_policy_filter_match(xpinfo))
return 0;
memset(tb, 0, sizeof(tb));
ntb = parse_rtattr_byindex(tb, XFRM_MAX_DEPTH, XFRMP_RTA(xpinfo), len);
if (n->nlmsg_type == XFRM_MSG_DELPOLICY)
fprintf(fp, "Deleted ");
xfrm_selector_print(&xpinfo->sel, preferred_family, fp, NULL);
fprintf(fp, "\t");
fprintf(fp, "%s ", (xpinfo->dir == XFRM_POLICY_IN ? "in " :
xpinfo->dir == XFRM_POLICY_OUT ? "out" :
xpinfo->dir == XFRM_POLICY_FWD ? "fwd" :
"unknown-dir"));
fprintf(fp, "%s ", (xpinfo->action == XFRM_POLICY_ALLOW ? "allow" :
xpinfo->action == XFRM_POLICY_BLOCK ? "block" :
"unknown-action"));
fprintf(fp, "index %u ", xpinfo->index);
fprintf(fp, "priority %u ", xpinfo->priority);
fprintf(fp, "share %s ", strxf_share(xpinfo->share));
fprintf(fp, "flags 0x%s", strxf_flags(xpinfo->flags));
fprintf(fp, "\n");
if (show_stats > 0)
xfrm_lifetime_print(&xpinfo->lft, &xpinfo->curlft, fp, "\t");
xfrm_xfrma_print(tb, ntb, xpinfo->sel.family, fp, "\t");
return 0;
}
static int xfrm_policy_get_or_delete(int argc, char **argv, int delete,
void *res_nlbuf)
{
struct rtnl_handle rth;
struct {
struct nlmsghdr n;
struct xfrm_userpolicy_id xpid;
} req;
char *dirp = NULL;
char *selp = NULL;
char *indexp = NULL;
memset(&req, 0, sizeof(req));
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, "sel") == 0) {
if (selp)
duparg("sel", *argv);
selp = *argv;
NEXT_ARG();
xfrm_selector_parse(&req.xpid.sel, &argc, &argv);
if (preferred_family == AF_UNSPEC)
preferred_family = req.xpid.sel.family;
} 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\" is invalid", *argv);
} else
invarg("unknown", *argv);
argc--; argv++;
}
if (!dirp) {
fprintf(stderr, "Not enough information: \"DIR\" is required.\n");
exit(1);
}
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 (rtnl_talk(&rth, &req.n, 0, 0, res_nlbuf, NULL, NULL) < 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);
}
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);
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.
*/
int xfrm_policy_keep(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 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;
}
if (!xfrm_policy_filter_match(xpinfo))
return 0;
if (xb->offset > xb->size) {
fprintf(stderr, "Flush 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_flush(int argc, char **argv, int flush)
{
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, "sel") == 0) {
NEXT_ARG();
xfrm_selector_parse(&filter.xpinfo.sel, &argc, &argv);
if (preferred_family == AF_UNSPEC)
preferred_family = filter.xpinfo.sel.family;
} else if (strcmp(*argv, "index") == 0) {
NEXT_ARG();
if (get_u32(&filter.xpinfo.index, *argv, 0))
invarg("\"INDEX\" is invalid", *argv);
filter.index_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\" is invalid", *argv);
filter.priority_mask = XFRM_FILTER_MASK_FULL;
} else
invarg("unknown", *argv);
argc--; argv++;
}
if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
exit(1);
if (flush) {
struct xfrm_buffer xb;
char buf[NLMSG_FLUSH_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, "Flush round = %d\n", i);
if (rtnl_wilddump_request(&rth, preferred_family, XFRM_MSG_GETPOLICY) < 0) {
perror("Cannot send dump request");
exit(1);
}
if (rtnl_dump_filter(&rth, xfrm_policy_keep, &xb, NULL, NULL) < 0) {
fprintf(stderr, "Flush terminated\n");
exit(1);
}
if (xb.nlmsg_count == 0) {
if (show_stats > 1)
fprintf(stderr, "Flush completed\n");
break;
}
if (rtnl_send(&rth, xb.buf, xb.offset) < 0) {
perror("Failed to send flush request\n");
exit(1);
}
if (show_stats > 1)
fprintf(stderr, "Flushed nlmsg count = %d\n", xb.nlmsg_count);
xb.offset = 0;
xb.nlmsg_count = 0;
}
} else {
if (rtnl_wilddump_request(&rth, preferred_family, XFRM_MSG_GETPOLICY) < 0) {
perror("Cannot send dump request");
exit(1);
}
if (rtnl_dump_filter(&rth, xfrm_policy_print, stdout, NULL, NULL) < 0) {
fprintf(stderr, "Dump terminated\n");
exit(1);
}
}
rtnl_close(&rth);
exit(0);
}
int do_xfrm_policy(int argc, char **argv)
{
if (argc < 1)
return xfrm_policy_list_or_flush(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 || matches(*argv, "del") == 0)
return xfrm_policy_delete(argc-1, argv+1);
if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
|| matches(*argv, "lst") == 0)
return xfrm_policy_list_or_flush(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_list_or_flush(argc-1, argv+1, 1);
if (matches(*argv, "help") == 0)
usage();
fprintf(stderr, "Command \"%s\" is unknown, try \"ip xfrm policy help\".\n", *argv);
exit(-1);
}

636
ip/xfrm_state.c
View File

@ -0,0 +1,636 @@
/* $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 <linux/xfrm.h>
#include "utils.h"
#include "xfrm.h"
#include "ip_common.h"
//#define NLMSG_FLUSH_BUF_SIZE (4096-512)
#define NLMSG_FLUSH_BUF_SIZE 8192
/*
* Receiving buffer defines:
* nlmsg
* data = struct xfrm_usersa_info
* rtattr
* rtattr
* ... (max count of rtattr is XFRM_MAX_DEPTH)
*
* 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
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, " [ reqid REQID ] [ FLAG-LIST ] [ sel SELECTOR ] [ LIMIT-LIST ]\n");
fprintf(stderr, "Usage: ip xfrm state { delete | get } ID\n");
fprintf(stderr, "Usage: ip xfrm state { flush | list } [ ID ] [ mode MODE ] [ reqid REQID ]\n");
fprintf(stderr, " [ FLAG_LIST ]\n");
fprintf(stderr, "ID := [ src ADDR ] [ dst ADDR ] [ proto XFRM_PROTO ] [ spi SPI ]\n");
fprintf(stderr, "XFRM_PROTO := [ esp | ah | ipcomp ]\n");
//fprintf(stderr, "SPI - security parameter index(default=0)\n");
fprintf(stderr, "MODE := [ transport | tunnel ](default=transport)\n");
//fprintf(stderr, "REQID - number(default=0)\n");
fprintf(stderr, "FLAG-LIST := [ FLAG-LIST ] [ flag FLAG ]\n");
fprintf(stderr, "FLAG := [ noecn ]\n");
fprintf(stderr, "ALGO-LIST := [ ALGO-LIST ] | [ algo ALGO ]\n");
fprintf(stderr, "ALGO := ALGO_TYPE ALGO_NAME ALGO_KEY\n");
fprintf(stderr, "ALGO_TYPE := [ E | A | C ]\n");
//fprintf(stderr, "ALGO_NAME - algorithm name\n");
//fprintf(stderr, "ALGO_KEY - algorithm key\n");
fprintf(stderr, "SELECTOR := src ADDR[/PLEN] dst ADDR[/PLEN] [ upspec UPSPEC ] [ dev DEV ]\n");
fprintf(stderr, "UPSPEC := proto PROTO [ sport PORT ] [ dport PORT ]\n");
//fprintf(stderr, "DEV - device name(default=none)\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");
exit(-1);
}
static int xfrm_algo_parse(struct xfrm_algo *alg, enum xfrm_attr_type_t type,
char *name, char *key, int max)
{
int len;
#if 1
/* XXX: verifying both name and key is required! */
fprintf(stderr, "warning: ALGONAME/ALGOKEY will send to kernel promiscuously!(verifying them isn't implemented yet)\n");
#endif
strncpy(alg->alg_name, name, sizeof(alg->alg_name));
if (strncmp(key, "0x", 2) == 0) {
/*
* XXX: fix me!!
*/
__u64 val = 0;
char *p = (char *)&val;
if (get_u64(&val, key, 16))
invarg("\"ALGOKEY\" is invalid", key);
len = (strlen(key) - 2) / 2;
if (len > sizeof(val))
invarg("\"ALGOKEY\" is invalid: too large", key);
if (len > 0) {
int index = sizeof(val) - len;
if (len > max)
invarg("\"ALGOKEY\" makes buffer overflow\n", key);
memcpy(alg->alg_key, &p[index], len);
}
} else {
len = strlen(key);
if (len > 0) {
if (len > max)
invarg("\"ALGOKEY\" makes buffer overflow\n", key);
strncpy(alg->alg_key, key, len);
}
}
alg->alg_key_len = len * 8;
return 0;
}
static int xfrm_state_flag_parse(__u8 *flags, int *argcp, char ***argvp)
{
int argc = *argcp;
char **argv = *argvp;
if (strcmp(*argv, "noecn") == 0)
*flags |= XFRM_STATE_NOECN;
else
invarg("\"FLAG\" is invalid", *argv);
filter.state_flags_mask = XFRM_FILTER_MASK_FULL;
*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;
char *idp = NULL;
char *ealgop = NULL;
char *aalgop = NULL;
char *calgop = NULL;
memset(&req, 0, sizeof(req));
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, "algo") == 0) {
struct {
struct xfrm_algo alg;
char buf[XFRM_ALGO_KEY_BUF_SIZE];
} alg;
int len;
enum xfrm_attr_type_t type;
char *name;
char *key;
NEXT_ARG();
if (strcmp(*argv, "E") == 0) {
if (ealgop)
duparg("ALGOTYPE", *argv);
ealgop = *argv;
type = XFRMA_ALG_CRYPT;
} else if (strcmp(*argv, "A") == 0) {
if (aalgop)
duparg("ALGOTYPE", *argv);
aalgop = *argv;
type = XFRMA_ALG_AUTH;
} else if (strcmp(*argv, "C") == 0) {
if (calgop)
duparg("ALGOTYPE", *argv);
calgop = *argv;
type = XFRMA_ALG_COMP;
} else
invarg("\"ALGOTYPE\" is invalid\n", *argv);
if (!NEXT_ARG_OK())
missarg("ALGONAME");
NEXT_ARG();
name = *argv;
if (!NEXT_ARG_OK())
missarg("ALGOKEY");
NEXT_ARG();
key = *argv;
memset(&alg, 0, sizeof(alg));
xfrm_algo_parse((void *)&alg, type, name, key, sizeof(alg.buf));
len = sizeof(struct xfrm_algo) + alg.alg.alg_key_len;
addattr_l(&req.n, sizeof(req.buf), type,
(void *)&alg, len);
} else if (strcmp(*argv, "mode") == 0) {
NEXT_ARG();
xfrm_mode_parse(&req.xsinfo.mode, &argc, &argv);
} else if (strcmp(*argv, "reqid") == 0) {
NEXT_ARG();
xfrm_reqid_parse(&req.xsinfo.reqid, &argc, &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 (idp)
invarg("unknown", *argv);
idp = *argv;
/* ID */
xfrm_id_parse(&req.xsinfo.saddr, &req.xsinfo.id,
&req.xsinfo.family, &argc, &argv);
if (preferred_family == AF_UNSPEC)
preferred_family = req.xsinfo.family;
}
argc--; argv++;
}
if (!idp) {
fprintf(stderr, "Not enough information: \"ID\" is required\n");
exit(1);
}
if (ealgop || aalgop || calgop) {
if (req.xsinfo.id.proto != IPPROTO_ESP &&
req.xsinfo.id.proto != IPPROTO_AH &&
req.xsinfo.id.proto != IPPROTO_COMP) {
fprintf(stderr, "\"ALGO\" is invalid with proto=%d\n", req.xsinfo.id.proto);
exit(1);
}
} else {
if (req.xsinfo.id.proto == IPPROTO_ESP ||
req.xsinfo.id.proto == IPPROTO_AH ||
req.xsinfo.id.proto == IPPROTO_COMP) {
fprintf(stderr, "\"ALGO\" is required with proto=%d\n", 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, NULL, NULL) < 0)
exit(2);
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 (memcmp(&xsinfo->saddr, &filter.xsinfo.saddr,
filter.id_src_mask) != 0)
return 0;
if (filter.id_dst_mask)
if (memcmp(&xsinfo->id.daddr, &filter.xsinfo.id.daddr,
filter.id_dst_mask) != 0)
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(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
{
FILE *fp = (FILE*)arg;
struct xfrm_usersa_info *xsinfo = NLMSG_DATA(n);
int len = n->nlmsg_len;
struct rtattr * tb[XFRMA_MAX+1];
int ntb;
if (n->nlmsg_type != XFRM_MSG_NEWSA &&
n->nlmsg_type != XFRM_MSG_DELSA) {
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;
memset(tb, 0, sizeof(tb));
ntb = parse_rtattr_byindex(tb, XFRM_MAX_DEPTH, XFRMS_RTA(xsinfo), len);
if (n->nlmsg_type == XFRM_MSG_DELSA)
fprintf(fp, "Deleted ");
xfrm_id_info_print(&xsinfo->saddr, &xsinfo->id, xsinfo->mode,
xsinfo->reqid, xsinfo->family, fp, NULL);
if (show_stats > 0) {
fprintf(fp, "\t");
fprintf(fp, "seq 0x%08u ", xsinfo->seq);
fprintf(fp, "replay-window %d ", xsinfo->replay_window);
fprintf(fp, "flags ");
if (xsinfo->flags & XFRM_STATE_NOECN)
fprintf(fp, "noecn ");
fprintf(fp, "(0x%s)", strxf_flags(xsinfo->flags));
fprintf(fp, "\n");
}
xfrm_xfrma_print(tb, ntb, xsinfo->family, fp, "\t");
if (show_stats > 0) {
fprintf(fp, "\tsel:\n");
xfrm_selector_print(&xsinfo->sel, xsinfo->family, fp, "\t ");
}
if (show_stats > 0) {
xfrm_lifetime_print(&xsinfo->lft, &xsinfo->curlft, fp, "\t");
xfrm_stats_print(&xsinfo->stats, fp, "\t");
}
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;
} req;
struct xfrm_id id;
char *idp = NULL;
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) {
/*
* XXX: Source address is not used and ignore it to follow
* XXX: a manner of setkey e.g. in the case of deleting/getting
* XXX: message of IPsec SA.
*/
xfrm_address_t ignore_saddr;
if (idp)
invarg("unknown", *argv);
idp = *argv;
/* ID */
memset(&id, 0, sizeof(id));
xfrm_id_parse(&ignore_saddr, &id, &req.xsid.family,
&argc, &argv);
memcpy(&req.xsid.daddr, &id.daddr, sizeof(req.xsid.daddr));
req.xsid.spi = id.spi;
req.xsid.proto = id.proto;
argc--; argv++;
}
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, NULL, 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, NULL, NULL) < 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.
*/
int xfrm_state_keep(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, "Flush 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;
xb->offset += new_n->nlmsg_len;
xb->nlmsg_count ++;
return 0;
}
static int xfrm_state_list_or_flush(int argc, char **argv, int flush)
{
char *idp = NULL;
struct rtnl_handle rth;
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, &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 (flush) {
struct xfrm_buffer xb;
char buf[NLMSG_FLUSH_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, "Flush 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, NULL, NULL) < 0) {
fprintf(stderr, "Flush terminated\n");
exit(1);
}
if (xb.nlmsg_count == 0) {
if (show_stats > 1)
fprintf(stderr, "Flush completed\n");
break;
}
if (rtnl_send(&rth, xb.buf, xb.offset) < 0) {
perror("Failed to send flush request\n");
exit(1);
}
if (show_stats > 1)
fprintf(stderr, "Flushed 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, NULL, NULL) < 0) {
fprintf(stderr, "Dump terminated\n");
exit(1);
}
}
rtnl_close(&rth);
exit(0);
}
int do_xfrm_state(int argc, char **argv)
{
if (argc < 1)
return xfrm_state_list_or_flush(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, "delete") == 0 || matches(*argv, "del") == 0)
return xfrm_state_get_or_delete(argc-1, argv+1, 1);
if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
|| matches(*argv, "lst") == 0)
return xfrm_state_list_or_flush(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_list_or_flush(argc-1, argv+1, 1);
if (matches(*argv, "help") == 0)
usage();
fprintf(stderr, "Command \"%s\" is unknown, try \"ip xfrm state help\".\n", *argv);
exit(-1);
}

22
lib/libnetlink.c
View File

@ -30,13 +30,13 @@ void rtnl_close(struct rtnl_handle *rth)
close(rth->fd);
}
int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions)
int rtnl_open_byproto(struct rtnl_handle *rth, unsigned subscriptions, int protocol)
{
int addr_len;
memset(rth, 0, sizeof(rth));
rth->fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
rth->fd = socket(AF_NETLINK, SOCK_RAW, protocol);
if (rth->fd < 0) {
perror("Cannot open netlink socket");
return -1;
@ -67,6 +67,11 @@ int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions)
return 0;
}
int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions)
{
return rtnl_open_byproto(rth, subscriptions, NETLINK_ROUTE);
}
int rtnl_wilddump_request(struct rtnl_handle *rth, int family, int type)
{
struct {
@ -521,3 +526,16 @@ int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len)
fprintf(stderr, "!!!Deficit %d, rta_len=%d\n", len, rta->rta_len);
return 0;
}
int parse_rtattr_byindex(struct rtattr *tb[], int max, struct rtattr *rta, int len)
{
int i = 0;
while (RTA_OK(rta, len)) {
if (rta->rta_type <= max)
tb[i++] = rta;
rta = RTA_NEXT(rta,len);
}
if (len)
fprintf(stderr, "!!!Deficit %d, rta_len=%d\n", len, rta->rta_len);
return i;
}

34
lib/utils.c
View File

@ -58,6 +58,20 @@ int get_unsigned(unsigned *val, const char *arg, int base)
return 0;
}
int get_u64(__u64 *val, const char *arg, int base)
{
unsigned long long res;
char *ptr;
if (!arg || !*arg)
return -1;
res = strtoull(arg, &ptr, base);
if (!ptr || ptr == arg || *ptr || res == 0xFFFFFFFFULL)
return -1;
*val = res;
return 0;
}
int get_u32(__u32 *val, const char *arg, int base)
{
unsigned long res;
@ -186,7 +200,7 @@ int get_addr_1(inet_prefix *addr, const char *name, int family)
return 0;
}
int get_prefix_1(inet_prefix *dst, char *arg, int family)
int get_prefix_1(inet_prefix *dst, const char *arg, int family)
{
int err;
unsigned plen;
@ -235,7 +249,7 @@ done:
return err;
}
int get_addr(inet_prefix *dst, char *arg, int family)
int get_addr(inet_prefix *dst, const char *arg, int family)
{
if (family == AF_PACKET) {
fprintf(stderr, "Error: \"%s\" may be inet address, but it is not allowed in this context.\n", arg);
@ -248,7 +262,7 @@ int get_addr(inet_prefix *dst, char *arg, int family)
return 0;
}
int get_prefix(inet_prefix *dst, char *arg, int family)
int get_prefix(inet_prefix *dst, const char *arg, int family)
{
if (family == AF_PACKET) {
fprintf(stderr, "Error: \"%s\" may be inet prefix, but it is not allowed in this context.\n", arg);
@ -261,7 +275,7 @@ int get_prefix(inet_prefix *dst, char *arg, int family)
return 0;
}
__u32 get_addr32(char *name)
__u32 get_addr32(const char *name)
{
inet_prefix addr;
if (get_addr_1(&addr, name, AF_INET)) {
@ -277,6 +291,12 @@ void incomplete_command(void)
exit(-1);
}
void missarg(const char *key)
{
fprintf(stderr, "Error: argument \"%s\" is required\n", key);
exit(-1);
}
void invarg(const char *msg, const char *arg)
{
fprintf(stderr, "Error: argument \"%s\" is wrong: %s\n", arg, msg);
@ -344,7 +364,7 @@ int __get_hz(void)
if (getenv("PROC_NET_PSCHED")) {
snprintf(name, sizeof(name)-1, "%s", getenv("PROC_NET_PSCHED"));
} else if (getenv("PROC_ROOT")) {
} else if (getenv("PROC_ROOT")) {
snprintf(name, sizeof(name)-1, "%s/net/psched", getenv("PROC_ROOT"));
} else {
strcpy(name, "/proc/net/psched");
@ -427,7 +447,7 @@ char *resolve_address(const char *addr, int len, int af)
sethostent(1);
fflush(stdout);
if ((h_ent = gethostbyaddr(addr, len, af)) != NULL)
if ((h_ent = gethostbyaddr(addr, len, af)) != NULL)
n->name = strdup(h_ent->h_name);
/* Even if we fail, "negative" entry is remembered. */
@ -436,7 +456,7 @@ char *resolve_address(const char *addr, int len, int af)
#endif
const char *format_host(int af, int len, const void *addr,
const char *format_host(int af, int len, const void *addr,
char *buf, int buflen)
{
#ifdef RESOLVE_HOSTNAMES