58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
/* Copyright (C) CZ.NIC, z.s.p.o. <knot-resolver@labs.nic.cz>
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#include <libknot/rrtype/opt.h>
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#include <string.h>
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#include "lib/cookies/lru_cache.h"
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#include "lib/utils.h"
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const uint8_t *kr_cookie_lru_get(kr_cookie_lru_t *cache,
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const struct sockaddr *sa)
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{
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if (!cache || !sa) {
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return NULL;
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}
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int addr_len = kr_inaddr_len(sa);
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const char *addr = kr_inaddr(sa);
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if (!addr || addr_len <= 0) {
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return NULL;
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}
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struct cookie_opt_data *cached = lru_get_try(cache, addr, addr_len);
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return cached ? cached->opt_data : NULL;
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}
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int kr_cookie_lru_set(kr_cookie_lru_t *cache, const struct sockaddr *sa,
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uint8_t *opt)
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{
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if (!cache || !sa) {
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return kr_error(EINVAL);
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}
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if (!opt) {
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return kr_ok();
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}
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int addr_len = kr_inaddr_len(sa);
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const char *addr = kr_inaddr(sa);
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if (!addr || addr_len <= 0) {
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return kr_error(EINVAL);
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}
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uint16_t opt_size = KNOT_EDNS_OPTION_HDRLEN +
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knot_edns_opt_get_length(opt);
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if (opt_size > KR_COOKIE_OPT_MAX_LEN) {
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return kr_error(EINVAL);
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}
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struct cookie_opt_data *cached = lru_get_new(cache, addr, addr_len, NULL);
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if (cached) {
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memcpy(cached->opt_data, opt, opt_size);
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}
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return kr_ok();
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}
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