NAME<\/a> bio \u2212 Basic I\/O abstraction<\/p>\n #include A BIO<\/small> is an I\/O abstraction, it hides many of the underlying I\/O details from an application. If an application uses a BIO<\/small> for its I\/O it can transparently handle SSL<\/small> connections, unencrypted network connections and file I\/O.<\/p>\n There are two type of BIO,<\/small> a source\/sink BIO<\/small> and a filter BIO.<\/small><\/p>\n As its name implies a source\/sink BIO<\/small> is a source and\/or sink of data, examples include a socket BIO<\/small> and a file BIO.<\/small><\/p>\n A filter BIO<\/small> takes data from one BIO<\/small> and passes it through to another, or the application. The data may be left unmodified (for example a message digest BIO<\/small> ) or translated (for example an encryption BIO<\/small> ). The effect of a filter BIO<\/small> may change according to the I\/O operation it is performing: for example an encryption BIO<\/small> will encrypt data if it is being written to and decrypt data if it is being read from.<\/p>\n BIOs can be joined together to form a chain (a single BIO<\/small> is a chain with one component). A chain normally consist of one source\/sink BIO<\/small> and one or more filter BIOs. Data read from or written to the first BIO<\/small> then traverses the chain to the end (normally a source\/sink BIO<\/small> ).<\/p>\n Some BIOs (such as memory BIOs) can be used immediately after calling BIO_new()<\/b>. Others (such as file BIOs) need some additional initialization, and frequently a utility function exists to create and initialize such BIOs.<\/p>\n If BIO_free()<\/b> is called on a BIO<\/small> chain it will only free one BIO<\/small> resulting in a memory leak.<\/p>\n Calling BIO_free_all()<\/b> on a single BIO<\/small> has the same effect as calling BIO_free()<\/b> on it other than the discarded return value.<\/p>\n Normally the type<\/b> argument is supplied by a function which returns a pointer to a BIO_METHOD.<\/small> There is a naming convention for such functions: a source\/sink BIO<\/small> is normally called BIO_s_*() and a filter BIO<\/small> BIO_f_*();<\/p>\n Create a memory BIO:<\/small><\/p>\n BIO *mem = BIO_new(BIO_s_mem());<\/p>\n BIO_ctrl<\/b>(3), BIO_f_base64<\/b>(3), BIO_f_buffer<\/b>(3), BIO_f_cipher<\/b>(3), BIO_f_md<\/b>(3), BIO_f_null<\/b>(3), BIO_f_ssl<\/b>(3), BIO_find_type<\/b>(3), BIO_new<\/b>(3), BIO_new_bio_pair<\/b>(3), BIO_push<\/b>(3), BIO_read_ex<\/b>(3), BIO_s_accept<\/b>(3), BIO_s_bio<\/b>(3), BIO_s_connect<\/b>(3), BIO_s_fd<\/b>(3), BIO_s_file<\/b>(3), BIO_s_mem<\/b>(3), BIO_s_null<\/b>(3), BIO_s_socket<\/b>(3), BIO_set_callback<\/b>(3), BIO_should_retry<\/b>(3)<\/p>\n Copyright 2000\u22122019 The OpenSSL Project Authors. All Rights Reserved.<\/p>\n Licensed under the OpenSSL license (the “License”). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE<\/small> in the source distribution or at bio \u2212 Basic I\/O abstraction <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[971],"tags":[973,1130,972],"class_list":["post-4048","post","type-post","status-publish","format-standard","hentry","category-7-miscelanea","tag-973","tag-bio","tag-man7"],"gutentor_comment":0,"_links":{"self":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/4048","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/comments?post=4048"}],"version-history":[{"count":0,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/posts\/4048\/revisions"}],"wp:attachment":[{"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/media?parent=4048"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/categories?post=4048"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lode.uno\/linux-man\/wp-json\/wp\/v2\/tags?post=4048"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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