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Merge pull request #4807 from hanno-arm/bio_recv_ret_0_eof

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Document that returning 0 from the recv callback means EOF
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Manuel Pégourié-Gonnard 2021-08-17 10:30:46 +02:00 committed by GitHub
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1 changed files with 4 additions and 3 deletions
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7
include/mbedtls/ssl.h
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@ -543,10 +543,11 @@ typedef int mbedtls_ssl_send_t( void *ctx,
* \param buf Buffer to write the received data to * \param buf Buffer to write the received data to
* \param len Length of the receive buffer * \param len Length of the receive buffer
* *
* \return The callback must return the number of bytes received, * \returns If data has been received, the positive number of bytes received.
* or a non-zero error code. * \returns \c 0 if the connection has been closed.
* If performing non-blocking I/O, \c MBEDTLS_ERR_SSL_WANT_READ * \returns If performing non-blocking I/O, \c MBEDTLS_ERR_SSL_WANT_READ
* must be returned when the operation would block. * must be returned when the operation would block.
* \returns Another negative error code on other kinds of failures.
* *
* \note The callback may receive fewer bytes than the length of the * \note The callback may receive fewer bytes than the length of the
* buffer. It must always return the number of bytes actually * buffer. It must always return the number of bytes actually