137 lines
3.7 KiB
C
137 lines
3.7 KiB
C
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/***
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This file is part of systemd.
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Copyright (C) 2017 Intel Corporation. All rights reserved.
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <netinet/icmp6.h>
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#include <netinet/in.h>
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#include "sd-radv.h"
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#include "alloc-util.h"
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#include "fd-util.h"
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#include "icmp6-util.h"
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#include "in-addr-util.h"
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#include "radv-internal.h"
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#include "socket-util.h"
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#include "string-util.h"
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#include "util.h"
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_public_ int sd_radv_prefix_new(sd_radv_prefix **ret) {
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_cleanup_(sd_radv_prefix_unrefp) sd_radv_prefix *p = NULL;
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assert_return(ret, -EINVAL);
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p = new0(sd_radv_prefix, 1);
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if (!p)
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return -ENOMEM;
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p->n_ref = 1;
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p->opt.type = ND_OPT_PREFIX_INFORMATION;
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p->opt.length = (sizeof(p->opt) - 1) /8 + 1;
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p->opt.prefixlen = 64;
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/* RFC 4861, Section 6.2.1 */
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SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_ONLINK, true);
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SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_AUTO, true);
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p->opt.preferred_lifetime = htobe32(604800);
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p->opt.valid_lifetime = htobe32(2592000);
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*ret = p;
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p = NULL;
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return 0;
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}
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_public_ sd_radv_prefix *sd_radv_prefix_ref(sd_radv_prefix *p) {
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if (!p)
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return NULL;
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assert(p->n_ref > 0);
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p->n_ref++;
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return p;
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}
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_public_ sd_radv_prefix *sd_radv_prefix_unref(sd_radv_prefix *p) {
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if (!p)
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return NULL;
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assert(p->n_ref > 0);
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p->n_ref--;
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if (p->n_ref > 0)
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return NULL;
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return mfree(p);
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}
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_public_ int sd_radv_prefix_set_prefix(sd_radv_prefix *p, struct in6_addr *in6_addr,
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unsigned char prefixlen) {
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assert_return(p, -EINVAL);
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assert_return(in6_addr, -EINVAL);
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if (prefixlen < 3 || prefixlen > 128)
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return -EINVAL;
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if (prefixlen > 64)
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/* unusual but allowed, log it */
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log_radv("Unusual prefix length %d greater than 64", prefixlen);
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p->opt.in6_addr = *in6_addr;
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p->opt.prefixlen = prefixlen;
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return 0;
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}
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_public_ int sd_radv_prefix_set_onlink(sd_radv_prefix *p, int onlink) {
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assert_return(p, -EINVAL);
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SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_ONLINK, onlink);
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return 0;
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}
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_public_ int sd_radv_prefix_set_address_autoconfiguration(sd_radv_prefix *p,
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int address_autoconfiguration) {
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assert_return(p, -EINVAL);
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SET_FLAG(p->opt.flags, ND_OPT_PI_FLAG_AUTO, address_autoconfiguration);
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return 0;
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}
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_public_ int sd_radv_prefix_set_valid_lifetime(sd_radv_prefix *p,
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uint32_t valid_lifetime) {
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assert_return(p, -EINVAL);
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p->opt.valid_lifetime = htobe32(valid_lifetime);
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return 0;
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}
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_public_ int sd_radv_prefix_set_preferred_lifetime(sd_radv_prefix *p,
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uint32_t preferred_lifetime) {
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assert_return(p, -EINVAL);
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p->opt.preferred_lifetime = htobe32(preferred_lifetime);
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return 0;
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}
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