diff options
Diffstat (limited to 'src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_cid.h')
| -rw-r--r-- | src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_cid.h | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_cid.h b/src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_cid.h new file mode 100644 index 0000000..0b37441 --- /dev/null +++ b/src/contrib/libngtcp2/ngtcp2/lib/ngtcp2_cid.h @@ -0,0 +1,175 @@ +/* + * 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. + */ +#ifndef NGTCP2_CID_H +#define NGTCP2_CID_H + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif /* HAVE_CONFIG_H */ + +#include <ngtcp2/ngtcp2.h> + +#include "ngtcp2_pq.h" +#include "ngtcp2_path.h" + +/* NGTCP2_SCID_FLAG_NONE indicates that no flag is set. */ +#define NGTCP2_SCID_FLAG_NONE 0x00u +/* NGTCP2_SCID_FLAG_USED indicates that a local endpoint observed that + a remote endpoint uses a particular Connection ID. */ +#define NGTCP2_SCID_FLAG_USED 0x01u +/* NGTCP2_SCID_FLAG_RETIRED indicates that a particular Connection ID + is retired. */ +#define NGTCP2_SCID_FLAG_RETIRED 0x02u + +typedef struct ngtcp2_scid { + ngtcp2_pq_entry pe; + /* seq is the sequence number associated to the CID. */ + uint64_t seq; + /* cid is a connection ID */ + ngtcp2_cid cid; + /* retired_ts is the timestamp when peer tells that this CID is + retired. */ + ngtcp2_tstamp retired_ts; + /* flags is the bitwise OR of zero or more of NGTCP2_SCID_FLAG_*. */ + uint8_t flags; +} ngtcp2_scid; + +/* NGTCP2_DCID_FLAG_NONE indicates that no flag is set. */ +#define NGTCP2_DCID_FLAG_NONE 0x00u +/* NGTCP2_DCID_FLAG_PATH_VALIDATED indicates that an associated path + has been validated. */ +#define NGTCP2_DCID_FLAG_PATH_VALIDATED 0x01u +/* NGTCP2_DCID_FLAG_TOKEN_PRESENT indicates that a stateless reset + token is set in token field. */ +#define NGTCP2_DCID_FLAG_TOKEN_PRESENT 0x02u + +typedef struct ngtcp2_dcid { + /* seq is the sequence number associated to the CID. */ + uint64_t seq; + /* cid is a connection ID */ + ngtcp2_cid cid; + /* path is a path which cid is bound to. The addresses are zero + length if cid has not been bound to a particular path yet. */ + ngtcp2_path_storage ps; + /* retired_ts is the timestamp when peer tells that this CID is + retired. */ + ngtcp2_tstamp retired_ts; + /* bound_ts is the timestamp when this connection ID is bound to a + particular path. It is only assigned when a connection ID is + used just for sending PATH_RESPONSE and is not zero-length. */ + ngtcp2_tstamp bound_ts; + /* bytes_sent is the number of bytes sent to an associated path. */ + uint64_t bytes_sent; + /* bytes_recv is the number of bytes received from an associated + path. */ + uint64_t bytes_recv; + /* max_udp_payload_size is the maximum size of UDP payload that is + allowed to send to this path. */ + size_t max_udp_payload_size; + /* flags is bitwise OR of zero or more of NGTCP2_DCID_FLAG_*. */ + uint8_t flags; + /* token is a stateless reset token associated to this CID. + Actually, the stateless reset token is tied to the connection, + not to the particular connection ID. */ + uint8_t token[NGTCP2_STATELESS_RESET_TOKENLEN]; +} ngtcp2_dcid; + +/* ngtcp2_cid_zero makes |cid| zero-length. */ +void ngtcp2_cid_zero(ngtcp2_cid *cid); + +/* + * ngtcp2_cid_less returns nonzero if |lhs| is lexicographical smaller + * than |rhs|. + */ +int ngtcp2_cid_less(const ngtcp2_cid *lhs, const ngtcp2_cid *rhs); + +/* + * ngtcp2_cid_empty returns nonzero if |cid| includes empty connection + * ID. + */ +int ngtcp2_cid_empty(const ngtcp2_cid *cid); + +/* + * ngtcp2_scid_init initializes |scid| with the given parameters. + */ +void ngtcp2_scid_init(ngtcp2_scid *scid, uint64_t seq, const ngtcp2_cid *cid); + +/* + * ngtcp2_scid_copy copies |src| into |dest|. + */ +void ngtcp2_scid_copy(ngtcp2_scid *dest, const ngtcp2_scid *src); + +/* + * ngtcp2_dcid_init initializes |dcid| with the given parameters. If + * |token| is NULL, the function fills dcid->token it with 0. |token| + * must be NGTCP2_STATELESS_RESET_TOKENLEN bytes long. + */ +void ngtcp2_dcid_init(ngtcp2_dcid *dcid, uint64_t seq, const ngtcp2_cid *cid, + const uint8_t *token); + +/* + * ngtcp2_dcid_set_token sets |token| to |dcid|. |token| must not be + * NULL and must be NGTCP2_STATELESS_RESET_TOKENLEN bytes long. + */ +void ngtcp2_dcid_set_token(ngtcp2_dcid *dcid, const uint8_t *token); + +/* + * ngtcp2_dcid_set_path sets |path| to |dcid|. It sets + * max_udp_payload_size to the minimum UDP payload size supported + * by the IP protocol version. + */ +void ngtcp2_dcid_set_path(ngtcp2_dcid *dcid, const ngtcp2_path *path); + +/* + * ngtcp2_dcid_copy copies |src| into |dest|. + */ +void ngtcp2_dcid_copy(ngtcp2_dcid *dest, const ngtcp2_dcid *src); + +/* + * ngtcp2_dcid_copy_cid_token behaves like ngtcp2_dcid_copy, but it + * only copies cid, seq, and path. + */ +void ngtcp2_dcid_copy_cid_token(ngtcp2_dcid *dest, const ngtcp2_dcid *src); + +/* + * ngtcp2_dcid_verify_uniqueness verifies uniqueness of (|seq|, |cid|, + * |token|) tuple against |dcid|. + */ +int ngtcp2_dcid_verify_uniqueness(ngtcp2_dcid *dcid, uint64_t seq, + const ngtcp2_cid *cid, const uint8_t *token); + +/* + * ngtcp2_dcid_verify_stateless_reset_token verifies stateless reset + * token |token| against the one included in |dcid|. This function + * returns 0 if the verification succeeds, or one of the following + * negative error codes: + * + * NGTCP2_ERR_INVALID_ARGUMENT + * Tokens do not match; or |dcid| does not contain a token. + */ +int ngtcp2_dcid_verify_stateless_reset_token(const ngtcp2_dcid *dcid, + const uint8_t *token); + +#endif /* NGTCP2_CID_H */ |