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127.TH BIO_find_type 3 "2010-11-16" "0.9.8p" "OpenSSL" 128.\" For nroff, turn off justification. Always turn off hyphenation; it makes 129.\" way too many mistakes in technical documents. 130.if n .ad l 131.nh |
132.SH "NAME" 133BIO_find_type, BIO_next \- BIO chain traversal 134.SH "SYNOPSIS" 135.IX Header "SYNOPSIS" 136.Vb 1 137\& #include <openssl/bio.h> |
138\& |
139\& BIO * BIO_find_type(BIO *b,int bio_type); 140\& BIO * BIO_next(BIO *b); |
141\& 142\& #define BIO_method_type(b) ((b)\->method\->type) 143\& |
144\& #define BIO_TYPE_NONE 0 145\& #define BIO_TYPE_MEM (1|0x0400) 146\& #define BIO_TYPE_FILE (2|0x0400) |
147\& |
148\& #define BIO_TYPE_FD (4|0x0400|0x0100) 149\& #define BIO_TYPE_SOCKET (5|0x0400|0x0100) 150\& #define BIO_TYPE_NULL (6|0x0400) 151\& #define BIO_TYPE_SSL (7|0x0200) 152\& #define BIO_TYPE_MD (8|0x0200) 153\& #define BIO_TYPE_BUFFER (9|0x0200) 154\& #define BIO_TYPE_CIPHER (10|0x0200) 155\& #define BIO_TYPE_BASE64 (11|0x0200) 156\& #define BIO_TYPE_CONNECT (12|0x0400|0x0100) 157\& #define BIO_TYPE_ACCEPT (13|0x0400|0x0100) 158\& #define BIO_TYPE_PROXY_CLIENT (14|0x0200) 159\& #define BIO_TYPE_PROXY_SERVER (15|0x0200) 160\& #define BIO_TYPE_NBIO_TEST (16|0x0200) 161\& #define BIO_TYPE_NULL_FILTER (17|0x0200) 162\& #define BIO_TYPE_BER (18|0x0200) 163\& #define BIO_TYPE_BIO (19|0x0400) |
164\& |
165\& #define BIO_TYPE_DESCRIPTOR 0x0100 166\& #define BIO_TYPE_FILTER 0x0200 167\& #define BIO_TYPE_SOURCE_SINK 0x0400 168.Ve 169.SH "DESCRIPTION" 170.IX Header "DESCRIPTION" 171The \fIBIO_find_type()\fR searches for a \s-1BIO\s0 of a given type in a chain, starting 172at \s-1BIO\s0 \fBb\fR. If \fBtype\fR is a specific type (such as \s-1BIO_TYPE_MEM\s0) then a search --- 18 unchanged lines hidden (view full) --- 191\&\fIBIO_method_type()\fR returns the type of the \s-1BIO\s0 \fBb\fR. 192.SH "NOTES" 193.IX Header "NOTES" 194\&\fIBIO_next()\fR was added to OpenSSL 0.9.6 to provide a 'clean' way to traverse a \s-1BIO\s0 195chain or find multiple matches using \fIBIO_find_type()\fR. Previous versions had to 196use: 197.PP 198.Vb 1 |
199\& next = bio\->next_bio; |
200.Ve 201.SH "BUGS" 202.IX Header "BUGS" 203\&\fIBIO_find_type()\fR in OpenSSL 0.9.5a and earlier could not be safely passed a 204\&\s-1NULL\s0 pointer for the \fBb\fR argument. 205.SH "EXAMPLE" 206.IX Header "EXAMPLE" 207Traverse a chain looking for digest BIOs: 208.PP 209.Vb 2 210\& BIO *btmp; 211\& btmp = in_bio; /* in_bio is chain to search through */ |
212\& |
213\& do { 214\& btmp = BIO_find_type(btmp, BIO_TYPE_MD); 215\& if(btmp == NULL) break; /* Not found */ 216\& /* btmp is a digest BIO, do something with it ...*/ 217\& ... |
218\& |
219\& btmp = BIO_next(btmp); 220\& } while(btmp); 221.Ve 222.SH "SEE ALSO" 223.IX Header "SEE ALSO" 224\&\s-1TBA\s0 |