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WIP QUIC protocol via OpenSSL, specify ALPN
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,193 @@ | ||
| /* | ||
| * Copyright © 2024, Lynne | ||
| * 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. | ||
| * | ||
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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. | ||
| */ | ||
|
|
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| #include <stdio.h> | ||
| #include <stdlib.h> | ||
| #include <errno.h> | ||
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| #include <openssl/ssl.h> | ||
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| #include "protocol_common.h" | ||
| #include "io_common.h" | ||
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| struct AVTProtocolCtx { | ||
| const AVTIO *io; | ||
| AVTIOCtx *io_ctx; | ||
|
|
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| SSL_CTX *ssl_ctx; | ||
|
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| BIO *bio; | ||
| SSL *ssl; | ||
| }; | ||
|
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| static COLD int quic_proto_close(AVTProtocolCtx **_p) | ||
| { | ||
| AVTProtocolCtx *p = *_p; | ||
| int err = p->io->close(&p->io_ctx); | ||
|
|
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| BIO_free_all(p->bio); | ||
| SSL_CTX_free(p->ssl_ctx); | ||
|
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| free(p); | ||
| *_p = NULL; | ||
| return err; | ||
| } | ||
|
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| static COLD int quic_proto_init(AVTContext *ctx, AVTProtocolCtx **_p, AVTAddress *addr) | ||
| { | ||
| AVTProtocolCtx *p = malloc(sizeof(*p)); | ||
| if (!p) | ||
| return AVT_ERROR(ENOMEM); | ||
|
|
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| int err = avt_io_init(ctx, &p->io, &p->io_ctx, addr); | ||
| if (err < 0) | ||
| free(p); | ||
|
|
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| p->ssl_ctx = SSL_CTX_new(OSSL_QUIC_client_method()); | ||
| if (!p->ssl_ctx) { | ||
| quic_proto_close(&p); | ||
| return AVT_ERROR(ENOMEM); | ||
| } | ||
|
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| /* Enable trust chain verification */ | ||
| SSL_CTX_set_verify(p->ssl_ctx, SSL_VERIFY_PEER, NULL); | ||
|
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| /* Load default root CA store */ | ||
| if (!SSL_CTX_set_default_verify_paths(p->ssl_ctx)) { | ||
| avt_log(p, AVT_LOG_ERROR, "Unable to load default root CA store\n"); | ||
| quic_proto_close(&p); | ||
| } | ||
|
|
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| p->bio = BIO_new_ssl_connect(p->ssl_ctx); | ||
| if (!p->bio) { | ||
| quic_proto_close(&p); | ||
| return AVT_ERROR(EINVAL); | ||
| } | ||
|
|
||
| if (!BIO_get_ssl(p->bio, &p->ssl)) { | ||
| avt_log(p, AVT_LOG_ERROR, "Unable to get SSL context\n"); | ||
| quic_proto_close(&p); | ||
| return AVT_ERROR(EINVAL); | ||
| } | ||
|
|
||
| if (strlen(addr->host)) { | ||
| /* Tell the SSL object the hostname to check certificates against. */ | ||
| if (SSL_set1_host(p->ssl, addr->host) <= 0) { | ||
| avt_log(p, AVT_LOG_ERROR, "Unable to set SSL hostname\n"); | ||
| quic_proto_close(&p); | ||
| return AVT_ERROR(EINVAL); | ||
| } | ||
| } | ||
|
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| /* Configure ALPN, which is required for QUIC */ | ||
| static const uint8_t alpn[] = { 4, 'a', 'v', 't', '0' }; | ||
| if (SSL_set_alpn_protos(p->ssl, alpn, sizeof(alpn))) { | ||
| /* Note: SSL_set_alpn_protos returns 1 for failure */ | ||
| avt_log(p, AVT_LOG_ERROR, "Unable to set ALPN\n"); | ||
| quic_proto_close(&p); | ||
| return AVT_ERROR(EINVAL); | ||
| } | ||
|
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| *_p = p; | ||
| return err; | ||
| } | ||
|
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| static int quic_proto_add_dst(AVTProtocolCtx *p, AVTAddress *addr) | ||
| { | ||
| if (!p->io->add_dst) | ||
| return AVT_ERROR(ENOTSUP); | ||
| return p->io->add_dst(p->io_ctx, addr); | ||
| } | ||
|
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| static int quic_proto_rm_dst(AVTProtocolCtx *p, AVTAddress *addr) | ||
| { | ||
| if (!p->io->del_dst) | ||
| return AVT_ERROR(ENOTSUP); | ||
| return p->io->del_dst(p->io_ctx, addr); | ||
| } | ||
|
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| static int64_t quic_proto_send_packet(AVTProtocolCtx *p, AVTPktd *pkt, | ||
| int64_t timeout) | ||
| { | ||
| return p->io->write_pkt(p->io_ctx, pkt, timeout); | ||
| } | ||
|
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| static int64_t quic_proto_send_seq(AVTProtocolCtx *p, AVTPacketFifo *seq, | ||
| int64_t timeout) | ||
| { | ||
| return p->io->write_vec(p->io_ctx, seq->data, seq->nb, timeout); | ||
| } | ||
|
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| static int64_t quic_proto_receive_packet(AVTProtocolCtx *p, | ||
| union AVTPacketData *pkt, AVTBuffer **pl, | ||
| int64_t timeout) | ||
| { | ||
| AVTBuffer *buf; | ||
| int64_t err = p->io->read_input(p->io_ctx, &buf, 0, timeout); | ||
| if (err < 0) | ||
| return err; | ||
|
|
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| // TODO - deserialize packet here | ||
|
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| return err; | ||
| } | ||
|
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| static int64_t quic_proto_max_pkt_len(AVTProtocolCtx *p) | ||
| { | ||
| return p->io->get_max_pkt_len(p->io_ctx); | ||
| } | ||
|
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| static int64_t quic_proto_seek(AVTProtocolCtx *p, | ||
| int64_t off, uint32_t seq, | ||
| int64_t ts, bool ts_is_dts) | ||
| { | ||
| if (p->io->seek) | ||
| return p->io->seek(p->io_ctx, off); | ||
| return AVT_ERROR(ENOTSUP); | ||
| } | ||
|
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| static int quic_proto_flush(AVTProtocolCtx *p, int64_t timeout) | ||
| { | ||
| if (p->io->flush) | ||
| return p->io->flush(p->io_ctx, timeout); | ||
| return AVT_ERROR(ENOTSUP); | ||
| } | ||
|
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| const AVTProtocol avt_protocol_quic = { | ||
| .name = "quic", | ||
| .type = AVT_PROTOCOL_QUIC, | ||
| .init = quic_proto_init, | ||
| .add_dst = quic_proto_add_dst, | ||
| .rm_dst = quic_proto_rm_dst, | ||
| .get_max_pkt_len = quic_proto_max_pkt_len, | ||
| .send_packet = quic_proto_send_packet, | ||
| .send_seq = quic_proto_send_seq, | ||
| .update_packet = NULL, | ||
| .receive_packet = quic_proto_receive_packet, | ||
| .seek = quic_proto_seek, | ||
| .flush = quic_proto_flush, | ||
| .close = quic_proto_close, | ||
| }; |
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