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During a DTLS handshake we may need to periodically handle timeouts in the DTLS timer to ensure retransmits due to lost packets are performed. However, one peer will always complete a handshake before the other. The DTLS timer stops once the handshake has finished so any handshake messages lost after that point will not automatically get retransmitted simply by calling DTLSv1_handle_timeout(). However attempting an SSL_read implies a DTLSv1_handle_timeout() and additionally will process records received from the peer. If those records are themselves retransmits then we know that the peer has not completed its handshake yet and a retransmit of our final flight automatically occurs. Reviewed-by: Paul Dale <paul.dale@oracle.com> (Merged from https://github.com/openssl/openssl/pull/8047)
57 lines
2.1 KiB
C
57 lines
2.1 KiB
C
/*
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* Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#ifndef HEADER_SSLTESTLIB_H
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# define HEADER_SSLTESTLIB_H
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# include <openssl/ssl.h>
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int create_ssl_ctx_pair(const SSL_METHOD *sm, const SSL_METHOD *cm,
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int min_proto_version, int max_proto_version,
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SSL_CTX **sctx, SSL_CTX **cctx, char *certfile,
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char *privkeyfile);
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int create_ssl_objects(SSL_CTX *serverctx, SSL_CTX *clientctx, SSL **sssl,
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SSL **cssl, BIO *s_to_c_fbio, BIO *c_to_s_fbio);
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int create_bare_ssl_connection(SSL *serverssl, SSL *clientssl, int want,
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int read);
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int create_ssl_objects2(SSL_CTX *serverctx, SSL_CTX *clientctx, SSL **sssl,
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SSL **cssl, int sfd, int cfd);
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int create_test_sockets(int *cfd, int *sfd);
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int create_ssl_connection(SSL *serverssl, SSL *clientssl, int want);
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void shutdown_ssl_connection(SSL *serverssl, SSL *clientssl);
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/* Note: Not thread safe! */
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const BIO_METHOD *bio_f_tls_dump_filter(void);
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void bio_f_tls_dump_filter_free(void);
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const BIO_METHOD *bio_s_mempacket_test(void);
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void bio_s_mempacket_test_free(void);
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/* Packet types - value 0 is reserved */
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#define INJECT_PACKET 1
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#define INJECT_PACKET_IGNORE_REC_SEQ 2
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/*
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* Mempacket BIO ctrls. We make them large enough to not clash with standard BIO
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* ctrl codes.
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*/
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#define MEMPACKET_CTRL_SET_DROP_EPOCH (1 << 15)
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#define MEMPACKET_CTRL_SET_DROP_REC (2 << 15)
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#define MEMPACKET_CTRL_GET_DROP_REC (3 << 15)
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#define MEMPACKET_CTRL_SET_DUPLICATE_REC (4 << 15)
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int mempacket_test_inject(BIO *bio, const char *in, int inl, int pktnum,
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int type);
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typedef struct mempacket_st MEMPACKET;
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DEFINE_STACK_OF(MEMPACKET)
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#endif /* HEADER_SSLTESTLIB_H */
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