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new control code BIO_C_RESET_READ_REQUEST

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Bodo Möller 1999-09-27 13:43:59 +00:00
parent 6cc4ee03df
commit e405b8d120
2 changed files with 16 additions and 0 deletions
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2
crypto/bio/bio.h
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@ -334,6 +334,7 @@ typedef struct bio_f_buffer_ctx_struct
#define BIO_C_NREAD 144
#define BIO_C_NWRITE0 145
#define BIO_C_NWRITE 146
#define BIO_C_RESET_READ_REQUEST 147
#define BIO_set_app_data(s,arg) BIO_set_ex_data(s,0,(char *)arg)
@ -470,6 +471,7 @@ size_t BIO_ctrl_wpending(BIO *b);
#define BIO_get_read_request(b) (int)BIO_ctrl(b,BIO_C_GET_READ_REQUEST,0,NULL)
size_t BIO_ctrl_get_write_guarantee(BIO *b);
size_t BIO_ctrl_get_read_request(BIO *b);
int BIO_ctrl_reset_read_request(BIO *b);
#ifdef NO_STDIO
#define NO_FP_API

14
crypto/bio/bss_bio.c
View File

@ -493,6 +493,15 @@ static long bio_ctrl(BIO *bio, int cmd, long num, void *ptr)
ret = (long) b->request;
break;
case BIO_C_RESET_READ_REQUEST:
/* Reset request. (Can be useful after read attempts
* at the other side that are meant to be non-blocking,
* e.g. when probing SSL_read to see if any data is
* available.) */
b->request = 0;
ret = 1;
break;
case BIO_C_SHUTDOWN_WR:
/* similar to shutdown(..., SHUT_WR) */
b->closed = 1;
@ -750,6 +759,11 @@ size_t BIO_ctrl_get_read_request(BIO *bio)
return BIO_ctrl(bio, BIO_C_GET_READ_REQUEST, 0, NULL);
}
int BIO_ctrl_reset_read_request(BIO *bio)
{
return (BIO_ctrl(bio, BIO_C_RESET_READ_REQUEST, 0, NULL) != 0);
}
/* BIO_nread0/nread/nwrite0/nwrite are availabe only for BIO pairs for now
* (conceivably some other BIOs could allow non-copying reads and writes too.)