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/*
* ngtcp2
*
* Copyright (c) 2018 ngtcp2 contributors
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "ngtcp2_cid.h"
#include <assert.h>
#include <string.h>
#include "ngtcp2_path.h"
#include "ngtcp2_str.h"
void ngtcp2_cid_zero(ngtcp2_cid *cid) { memset(cid, 0, sizeof(*cid)); }
void ngtcp2_cid_init(ngtcp2_cid *cid, const uint8_t *data, size_t datalen) {
assert(datalen <= NGTCP2_MAX_CIDLEN);
cid->datalen = datalen;
if (datalen) {
ngtcp2_cpymem(cid->data, data, datalen);
}
}
int ngtcp2_cid_eq(const ngtcp2_cid *cid, const ngtcp2_cid *other) {
return cid->datalen == other->datalen &&
0 == memcmp(cid->data, other->data, cid->datalen);
}
int ngtcp2_cid_less(const ngtcp2_cid *lhs, const ngtcp2_cid *rhs) {
int s = lhs->datalen < rhs->datalen;
size_t n = s ? lhs->datalen : rhs->datalen;
int c = memcmp(lhs->data, rhs->data, n);
return c < 0 || (c == 0 && s);
}
int ngtcp2_cid_empty(const ngtcp2_cid *cid) { return cid->datalen == 0; }
void ngtcp2_scid_init(ngtcp2_scid *scid, uint64_t seq, const ngtcp2_cid *cid) {
scid->pe.index = NGTCP2_PQ_BAD_INDEX;
scid->seq = seq;
scid->cid = *cid;
scid->retired_ts = UINT64_MAX;
scid->flags = NGTCP2_SCID_FLAG_NONE;
}
void ngtcp2_scid_copy(ngtcp2_scid *dest, const ngtcp2_scid *src) {
ngtcp2_scid_init(dest, src->seq, &src->cid);
dest->retired_ts = src->retired_ts;
dest->flags = src->flags;
}
void ngtcp2_dcid_init(ngtcp2_dcid *dcid, uint64_t seq, const ngtcp2_cid *cid,
const uint8_t *token) {
dcid->seq = seq;
dcid->cid = *cid;
if (token) {
memcpy(dcid->token, token, NGTCP2_STATELESS_RESET_TOKENLEN);
dcid->flags = NGTCP2_DCID_FLAG_TOKEN_PRESENT;
} else {
dcid->flags = NGTCP2_DCID_FLAG_NONE;
}
ngtcp2_path_storage_zero(&dcid->ps);
dcid->retired_ts = UINT64_MAX;
dcid->bound_ts = UINT64_MAX;
dcid->bytes_sent = 0;
dcid->bytes_recv = 0;
dcid->max_udp_payload_size = NGTCP2_MAX_UDP_PAYLOAD_SIZE;
}
void ngtcp2_dcid_set_token(ngtcp2_dcid *dcid, const uint8_t *token) {
assert(token);
dcid->flags |= NGTCP2_DCID_FLAG_TOKEN_PRESENT;
memcpy(dcid->token, token, NGTCP2_STATELESS_RESET_TOKENLEN);
}
void ngtcp2_dcid_set_path(ngtcp2_dcid *dcid, const ngtcp2_path *path) {
ngtcp2_path_copy(&dcid->ps.path, path);
}
void ngtcp2_dcid_copy(ngtcp2_dcid *dest, const ngtcp2_dcid *src) {
ngtcp2_dcid_init(dest, src->seq, &src->cid,
(src->flags & NGTCP2_DCID_FLAG_TOKEN_PRESENT) ? src->token
: NULL);
ngtcp2_path_copy(&dest->ps.path, &src->ps.path);
dest->retired_ts = src->retired_ts;
dest->bound_ts = src->bound_ts;
dest->flags = src->flags;
dest->bytes_sent = src->bytes_sent;
dest->bytes_recv = src->bytes_recv;
dest->max_udp_payload_size = src->max_udp_payload_size;
}
void ngtcp2_dcid_copy_cid_token(ngtcp2_dcid *dest, const ngtcp2_dcid *src) {
dest->seq = src->seq;
dest->cid = src->cid;
if (src->flags & NGTCP2_DCID_FLAG_TOKEN_PRESENT) {
dest->flags |= NGTCP2_DCID_FLAG_TOKEN_PRESENT;
memcpy(dest->token, src->token, NGTCP2_STATELESS_RESET_TOKENLEN);
} else if (dest->flags & NGTCP2_DCID_FLAG_TOKEN_PRESENT) {
dest->flags &= (uint8_t)~NGTCP2_DCID_FLAG_TOKEN_PRESENT;
}
}
int ngtcp2_dcid_verify_uniqueness(ngtcp2_dcid *dcid, uint64_t seq,
const ngtcp2_cid *cid, const uint8_t *token) {
if (dcid->seq == seq) {
return ngtcp2_cid_eq(&dcid->cid, cid) &&
(dcid->flags & NGTCP2_DCID_FLAG_TOKEN_PRESENT) &&
memcmp(dcid->token, token,
NGTCP2_STATELESS_RESET_TOKENLEN) == 0
? 0
: NGTCP2_ERR_PROTO;
}
return !ngtcp2_cid_eq(&dcid->cid, cid) ? 0 : NGTCP2_ERR_PROTO;
}
int ngtcp2_dcid_verify_stateless_reset_token(const ngtcp2_dcid *dcid,
const uint8_t *token) {
return (dcid->flags & NGTCP2_DCID_FLAG_TOKEN_PRESENT) &&
ngtcp2_cmemeq(dcid->token, token,
NGTCP2_STATELESS_RESET_TOKENLEN)
? 0
: NGTCP2_ERR_INVALID_ARGUMENT;
}
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