Manual Pages for UNIX Operating System command usage for man BIO_find_type

OpenSSL                                   BIO_find_type(3openssl)



NNNNAAAAMMMMEEEE
     BIO_find_type, BIO_next - BIO chain traversal

SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
      #include 

      BIO *  BIO_find_type(BIO *b,int bio_type);
      BIO *  BIO_next(BIO *b);

      #define BIO_method_type(b)             ((b)->method->type)

      #define BIO_TYPE_NONE          0
      #define BIO_TYPE_MEM           (1|0x0400)
      #define BIO_TYPE_FILE          (2|0x0400)

      #define BIO_TYPE_FD            (4|0x0400|0x0100)
      #define BIO_TYPE_SOCKET                (5|0x0400|0x0100)
      #define BIO_TYPE_NULL          (6|0x0400)
      #define BIO_TYPE_SSL           (7|0x0200)
      #define BIO_TYPE_MD            (8|0x0200)
      #define BIO_TYPE_BUFFER                (9|0x0200)
      #define BIO_TYPE_CIPHER                (10|0x0200)
      #define BIO_TYPE_BASE64                (11|0x0200)
      #define BIO_TYPE_CONNECT       (12|0x0400|0x0100)
      #define BIO_TYPE_ACCEPT                (13|0x0400|0x0100)
      #define BIO_TYPE_PROXY_CLIENT  (14|0x0200)
      #define BIO_TYPE_PROXY_SERVER  (15|0x0200)
      #define BIO_TYPE_NBIO_TEST     (16|0x0200)
      #define BIO_TYPE_NULL_FILTER   (17|0x0200)
      #define BIO_TYPE_BER           (18|0x0200)
      #define BIO_TYPE_BIO           (19|0x0400)

      #define BIO_TYPE_DESCRIPTOR    0x0100
      #define BIO_TYPE_FILTER                0x0200
      #define BIO_TYPE_SOURCE_SINK   0x0400


DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
     The BIO_find_type() searches for a BIO of a given type in a
     chain, starting at BIO bbbb. If ttttyyyyppppeeee is a specific type (such
     as BIO_TYPE_MEM) then a search is made for a BIO of that
     type. If ttttyyyyppppeeee is a general type (such as
     BBBBIIIIOOOO_TTTTYYYYPPPPEEEE_SSSSOOOOUUUURRRRCCCCEEEE_SSSSIIIINNNNKKKK) then the next matching BIO of the
     given general type is searched for. BIO_find_type() returns
     the next matching BIO or NULL if none is found.

     Note: not all the BBBBIIIIOOOO_TTTTYYYYPPPPEEEE_**** types above have corresponding
     BIO implementations.

     BIO_next() returns the next BIO in a chain. It can be used
     to traverse all BIOs in a chain or used in conjunction with
     BIO_find_type() to find all BIOs of a certain type.



14/Sep/2000            Last change: 0.9.8o                      1






OpenSSL                                   BIO_find_type(3openssl)



     BIO_method_type() returns the type of a BIO.

RRRREEEETTTTUUUURRRRNNNN VVVVAAAALLLLUUUUEEEESSSS
     BIO_find_type() returns a matching BIO or NULL for no match.

     BIO_next() returns the next BIO in a chain.

     BIO_method_type() returns the type of the BIO bbbb.

NNNNOOOOTTTTEEEESSSS
     BIO_next() was added to OpenSSL 0.9.6 to provide a 'clean'
     way to traverse a BIO chain or find multiple matches using
     BIO_find_type(). Previous versions had to use:

      next = bio->next_bio;


BBBBUUUUGGGGSSSS
     BIO_find_type() in OpenSSL 0.9.5a and earlier could not be
     safely passed a NULL pointer for the bbbb argument.

EEEEXXXXAAAAMMMMPPPPLLLLEEEE
     Traverse a chain looking for digest BIOs:

      BIO *btmp;
      btmp = in_bio; /* in_bio is chain to search through */

      do {
             btmp = BIO_find_type(btmp, BIO_TYPE_MD);
             if(btmp == NULL) break; /* Not found */
             /* btmp is a digest BIO, do something with it ...*/
             ...

             btmp = BIO_next(btmp);
      } while(btmp);


SSSSEEEEEEEE AAAALLLLSSSSOOOO
     TBA
















14/Sep/2000            Last change: 0.9.8o                      2