872b698bd4
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
459 lines
10 KiB
C
459 lines
10 KiB
C
/* $KAME: ip6addrctl.c,v 1.3 2003/12/16 08:14:28 suz Exp $ */
|
|
|
|
/*-
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*
|
|
* Copyright (C) 2001 WIDE Project.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the project nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/queue.h>
|
|
#include <sys/param.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <net/if.h>
|
|
|
|
#include <netinet/in.h>
|
|
#include <netinet6/in6_var.h>
|
|
|
|
#include <stdlib.h>
|
|
#include <netdb.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <limits.h>
|
|
#include <string.h>
|
|
#include <err.h>
|
|
|
|
static char *configfile;
|
|
|
|
struct policyqueue {
|
|
TAILQ_ENTRY(policyqueue) pc_entry;
|
|
struct in6_addrpolicy pc_policy;
|
|
};
|
|
TAILQ_HEAD(policyhead, policyqueue);
|
|
static struct policyhead policyhead;
|
|
|
|
static void usage(void);
|
|
static void get_policy(void);
|
|
static void dump_policy(void);
|
|
static int mask2plen(struct sockaddr_in6 *);
|
|
static int parse_prefix(const char *, struct in6_addrpolicy *);
|
|
static void make_policy_fromfile(char *);
|
|
static void plen2mask(struct sockaddr_in6 *, int);
|
|
static void set_policy(void);
|
|
static void add_policy(char *, char *, char *);
|
|
static void delete_policy(char *);
|
|
static void flush_policy(void);
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
TAILQ_INIT(&policyhead);
|
|
|
|
if (argc == 1 || strcasecmp(argv[1], "show") == 0) {
|
|
get_policy();
|
|
dump_policy();
|
|
} else if (strcasecmp(argv[1], "add") == 0) {
|
|
if (argc < 5)
|
|
usage();
|
|
add_policy(argv[2], argv[3], argv[4]);
|
|
} else if (strcasecmp(argv[1], "delete") == 0) {
|
|
if (argc < 3)
|
|
usage();
|
|
delete_policy(argv[2]);
|
|
} else if (strcasecmp(argv[1], "flush") == 0) {
|
|
get_policy();
|
|
flush_policy();
|
|
} else if (strcasecmp(argv[1], "install") == 0) {
|
|
if (argc < 3)
|
|
usage();
|
|
configfile = argv[2];
|
|
make_policy_fromfile(configfile);
|
|
set_policy();
|
|
} else
|
|
usage();
|
|
|
|
exit(0);
|
|
}
|
|
|
|
static void
|
|
get_policy(void)
|
|
{
|
|
int mib[] = { CTL_NET, PF_INET6, IPPROTO_IPV6, IPV6CTL_ADDRCTLPOLICY };
|
|
size_t l;
|
|
struct in6_addrpolicy *buf;
|
|
struct in6_addrpolicy *pol, *ep;
|
|
|
|
if (sysctl(mib, nitems(mib), NULL, &l, NULL, 0) < 0) {
|
|
err(1, "sysctl(IPV6CTL_ADDRCTLPOLICY)");
|
|
/* NOTREACHED */
|
|
}
|
|
if (l == 0) {
|
|
printf("no source-address-selection policy is installed\n");
|
|
return;
|
|
}
|
|
if ((buf = malloc(l)) == NULL) {
|
|
errx(1, "malloc failed");
|
|
/* NOTREACHED */
|
|
}
|
|
if (sysctl(mib, nitems(mib), buf, &l, NULL, 0) < 0) {
|
|
err(1, "sysctl(IPV6CTL_ADDRCTLPOLICY)");
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
ep = buf + l/sizeof(*buf);
|
|
for (pol = buf; pol + 1 <= ep; pol++) {
|
|
struct policyqueue *new;
|
|
|
|
if ((new = malloc(sizeof(*new))) == NULL)
|
|
errx(1, "malloc failed\n");
|
|
new->pc_policy = *pol;
|
|
TAILQ_INSERT_TAIL(&policyhead, new, pc_entry);
|
|
}
|
|
|
|
free(buf);
|
|
}
|
|
|
|
static void
|
|
dump_policy(void)
|
|
{
|
|
size_t addrlen;
|
|
char addrbuf[NI_MAXHOST];
|
|
struct in6_addrpolicy *pol;
|
|
struct policyqueue *ent;
|
|
int plen, first = 1;
|
|
|
|
for (ent = TAILQ_FIRST(&policyhead); ent;
|
|
ent = TAILQ_NEXT(ent, pc_entry)) {
|
|
pol = &ent->pc_policy;
|
|
if (first) {
|
|
printf("%-30s %5s %5s %8s\n",
|
|
"Prefix", "Prec", "Label", "Use");
|
|
first = 0;
|
|
}
|
|
|
|
if ((getnameinfo((struct sockaddr *)&pol->addr,
|
|
sizeof(pol->addr), addrbuf, sizeof(addrbuf),
|
|
NULL, 0, NI_NUMERICHOST))) {
|
|
warnx("getnameinfo for prefix address failed");
|
|
continue;
|
|
}
|
|
if ((plen = mask2plen(&pol->addrmask)) < 0) {
|
|
warnx("invalid address mask");
|
|
continue;
|
|
}
|
|
addrlen = strlen(addrbuf);
|
|
if (addrlen + sizeof("/128") < sizeof(addrbuf)) {
|
|
snprintf(&addrbuf[addrlen],
|
|
sizeof(addrbuf) - addrlen - 1,
|
|
"/%d", plen);
|
|
printf("%-30s", addrbuf);
|
|
} else /* XXX */
|
|
printf("%s/%d", addrbuf, plen);
|
|
printf(" %5d %5d %8llu\n", pol->preced, pol->label,
|
|
(unsigned long long)pol->use);
|
|
}
|
|
}
|
|
|
|
#define SKIP_WHITE(p, emptyok) \
|
|
do { \
|
|
while((*(p) == ' ' || *(p) == '\t')) \
|
|
(p)++; \
|
|
if ((*(p) == '\0' || (*(p) == '\n')) && !(emptyok)) \
|
|
goto bad; \
|
|
} while (0);
|
|
#define SKIP_WORD(p) \
|
|
do { \
|
|
while(*(p) != ' ' && *(p) != '\t') \
|
|
(p)++; \
|
|
if (*(p) == '\0' || *(p) == '\n') \
|
|
goto bad; \
|
|
} while (0);
|
|
|
|
static void
|
|
make_policy_fromfile(char *conf)
|
|
{
|
|
char line[_POSIX2_LINE_MAX], *cp;
|
|
char *addrstr;
|
|
FILE *fp;
|
|
int count = 0;
|
|
struct in6_addrpolicy pol0;
|
|
struct policyqueue *new;
|
|
|
|
if ((fp = fopen(conf, "r")) == NULL)
|
|
err(1, "fopen: %s", conf);
|
|
|
|
while(fgets(line, sizeof(line), fp)) {
|
|
count++;
|
|
cp = line;
|
|
|
|
memset(&pol0, 0, sizeof(pol0));
|
|
|
|
/* get prefix */
|
|
SKIP_WHITE(cp, 1);
|
|
if (*cp == '\n') /* empty line */
|
|
continue;
|
|
if (*cp == '#')
|
|
continue;
|
|
addrstr = cp;
|
|
if (parse_prefix((const char *)addrstr, &pol0))
|
|
goto bad;
|
|
|
|
/* get precedence value */
|
|
SKIP_WORD(cp);
|
|
SKIP_WHITE(cp, 0);
|
|
pol0.preced = atoi(cp);
|
|
|
|
/* get label */
|
|
SKIP_WORD(cp);
|
|
SKIP_WHITE(cp, 0);
|
|
pol0.label = atoi(cp);
|
|
|
|
/* parse succeeded. make a control buffer entry. */
|
|
if ((new = malloc(sizeof(*new))) == NULL)
|
|
errx(1, "malloc failed\n");
|
|
memset(new, 0, sizeof(*new));
|
|
new->pc_policy = pol0;
|
|
TAILQ_INSERT_TAIL(&policyhead, new, pc_entry);
|
|
}
|
|
|
|
fclose(fp);
|
|
return;
|
|
|
|
bad:
|
|
errx(1, "parse failed at line %d", count);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
static int
|
|
parse_prefix(const char *prefix0, struct in6_addrpolicy *pol)
|
|
{
|
|
int e = 0, plen;
|
|
char *prefix, *plenstr;
|
|
struct addrinfo hints, *res;
|
|
|
|
if ((prefix = strdup(prefix0)) == NULL)
|
|
errx(1, "strdup failed");
|
|
|
|
if ((plenstr = strchr(prefix, '/')) == NULL) {
|
|
e = -1;
|
|
goto end;
|
|
}
|
|
*plenstr = '\0';
|
|
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_flags = AI_NUMERICHOST;
|
|
hints.ai_family = AF_INET6;
|
|
|
|
if ((e = getaddrinfo(prefix, NULL, &hints, &res)) != 0) {
|
|
warnx("getaddrinfo failed for %s: %s", prefix,
|
|
gai_strerror(e));
|
|
goto end;
|
|
}
|
|
memcpy(&pol->addr, res->ai_addr, res->ai_addrlen);
|
|
freeaddrinfo(res);
|
|
plen = atoi(plenstr + 1);
|
|
if (plen < 0 || plen > 128) {
|
|
warnx("invalid prefix length: %d", plen);
|
|
e = -1;
|
|
goto end;
|
|
}
|
|
plen2mask(&pol->addrmask, plen);
|
|
|
|
end:
|
|
free(prefix);
|
|
return(e);
|
|
}
|
|
|
|
static void
|
|
plen2mask(struct sockaddr_in6 *mask, int plen)
|
|
{
|
|
u_char *cp = (unsigned char *)&mask->sin6_addr;
|
|
|
|
memset(mask, 0, sizeof(*mask));
|
|
mask->sin6_family = AF_INET6; /* just in case */
|
|
mask->sin6_len = sizeof(*mask);
|
|
|
|
for(; plen >= 8; plen -= 8)
|
|
*cp++ = 0xff;
|
|
if (plen > 0)
|
|
*cp = (0xff << (8 - plen));
|
|
}
|
|
|
|
static void
|
|
set_policy(void)
|
|
{
|
|
struct policyqueue *ent;
|
|
int s;
|
|
|
|
if ((s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP)) < 0)
|
|
err(1, "socket(UDP)");
|
|
|
|
for (ent = TAILQ_FIRST(&policyhead); ent;
|
|
ent = TAILQ_NEXT(ent, pc_entry)) {
|
|
if (ioctl(s, SIOCAADDRCTL_POLICY, &ent->pc_policy))
|
|
warn("ioctl(SIOCAADDRCTL_POLICY)");
|
|
}
|
|
|
|
close(s);
|
|
}
|
|
|
|
static int
|
|
mask2plen(struct sockaddr_in6 *mask)
|
|
{
|
|
int masklen, final = 0;
|
|
u_char *p, *lim;
|
|
|
|
masklen = 0;
|
|
lim = (u_char *)(mask + 1);
|
|
for (p = (u_char *)(&mask->sin6_addr); p < lim; p++) {
|
|
if (final && *p) {
|
|
goto bad;
|
|
}
|
|
|
|
switch (*p & 0xff) {
|
|
case 0xff:
|
|
masklen += 8;
|
|
break;
|
|
case 0xfe:
|
|
masklen += 7;
|
|
final++;
|
|
break;
|
|
case 0xfc:
|
|
masklen += 6;
|
|
final++;
|
|
break;
|
|
case 0xf8:
|
|
masklen += 5;
|
|
final++;
|
|
break;
|
|
case 0xf0:
|
|
masklen += 4;
|
|
final++;
|
|
break;
|
|
case 0xe0:
|
|
masklen += 3;
|
|
final++;
|
|
break;
|
|
case 0xc0:
|
|
masklen += 2;
|
|
final++;
|
|
break;
|
|
case 0x80:
|
|
masklen += 1;
|
|
final++;
|
|
break;
|
|
case 0x00:
|
|
final++;
|
|
break;
|
|
default:
|
|
goto bad;
|
|
break;
|
|
}
|
|
}
|
|
return(masklen);
|
|
|
|
bad:
|
|
return(-1);
|
|
}
|
|
|
|
static void
|
|
add_policy(char *prefix, char *prec, char *label)
|
|
{
|
|
struct in6_addrpolicy p;
|
|
int s;
|
|
|
|
memset(&p, 0, sizeof(p));
|
|
|
|
if (parse_prefix((const char *)prefix, &p))
|
|
errx(1, "bad prefix: %s", prefix);
|
|
p.preced = atoi(prec);
|
|
p.label = atoi(label);
|
|
|
|
if ((s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP)) < 0)
|
|
err(1, "socket(UDP)");
|
|
if (ioctl(s, SIOCAADDRCTL_POLICY, &p))
|
|
err(1, "ioctl(SIOCAADDRCTL_POLICY)");
|
|
|
|
close(s);
|
|
}
|
|
|
|
static void
|
|
delete_policy(char *prefix)
|
|
{
|
|
struct in6_addrpolicy p;
|
|
int s;
|
|
|
|
memset(&p, 0, sizeof(p));
|
|
|
|
if (parse_prefix((const char *)prefix, &p))
|
|
errx(1, "bad prefix: %s", prefix);
|
|
|
|
if ((s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP)) < 0)
|
|
err(1, "socket(UDP)");
|
|
if (ioctl(s, SIOCDADDRCTL_POLICY, &p))
|
|
err(1, "ioctl(SIOCDADDRCTL_POLICY)");
|
|
|
|
close(s);
|
|
}
|
|
|
|
static void
|
|
flush_policy(void)
|
|
{
|
|
struct policyqueue *ent;
|
|
int s;
|
|
|
|
if ((s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP)) < 0)
|
|
err(1, "socket(UDP)");
|
|
|
|
for (ent = TAILQ_FIRST(&policyhead); ent;
|
|
ent = TAILQ_NEXT(ent, pc_entry)) {
|
|
if (ioctl(s, SIOCDADDRCTL_POLICY, &ent->pc_policy))
|
|
warn("ioctl(SIOCDADDRCTL_POLICY)");
|
|
}
|
|
|
|
close(s);
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
fprintf(stderr, "usage: ip6addrctl [show]\n");
|
|
fprintf(stderr, " ip6addrctl add "
|
|
"<prefix> <precedence> <label>\n");
|
|
fprintf(stderr, " ip6addrctl delete <prefix>\n");
|
|
fprintf(stderr, " ip6addrctl flush\n");
|
|
fprintf(stderr, " ip6addrctl install <configfile>\n");
|
|
|
|
exit(1);
|
|
}
|