/*
- * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
*
- * Licensed under the OpenSSL license (the "License"). You may not use
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
#include <stdio.h>
#include <errno.h>
#include <openssl/crypto.h>
-#include "bio_lcl.h"
+#include "bio_local.h"
#include "internal/cryptlib.h"
long ret;
int bareoper;
- if (b->callback_ex != NULL) {
+ if (b->callback_ex != NULL)
return b->callback_ex(b, oper, argp, len, argi, argl, inret, processed);
- }
/* Strip off any BIO_CB_RETURN flag */
bareoper = oper & ~BIO_CB_RETURN;
return -1;
argi = (int)len;
+ }
- if (inret && (oper & BIO_CB_RETURN)) {
- if (*processed > INT_MAX)
- return -1;
- inret = *processed;
- }
+ if (inret > 0 && (oper & BIO_CB_RETURN) && bareoper != BIO_CB_CTRL) {
+ if (*processed > INT_MAX)
+ return -1;
+ inret = *processed;
}
ret = b->callback(b, oper, argp, argi, argl, inret);
- if (ret >= 0 && (HAS_LEN_OPER(bareoper) || bareoper == BIO_CB_PUTS)) {
+ if (ret > 0 && (oper & BIO_CB_RETURN) && bareoper != BIO_CB_CTRL) {
*processed = (size_t)ret;
ret = 1;
}
if (bio == NULL) {
BIOerr(BIO_F_BIO_NEW, ERR_R_MALLOC_FAILURE);
- return (NULL);
+ return NULL;
}
bio->method = method;
CRYPTO_THREAD_lock_free(bio->lock);
goto err;
}
+ if (method->create == NULL)
+ bio->init = 1;
return bio;
if ((b->callback != NULL || b->callback_ex != NULL) &&
((ret = (int)bio_call_callback(b, BIO_CB_READ, data, dlen, 0, 0L, 1L,
- readbytes)) <= 0))
+ NULL)) <= 0))
return ret;
if (!b->init) {
if ((b->callback != NULL || b->callback_ex != NULL) &&
((ret = (int)bio_call_callback(b, BIO_CB_WRITE, data, dlen, 0, 0L, 1L,
- written)) <= 0))
+ NULL)) <= 0))
return ret;
if (!b->init) {
if ((b == NULL) || (b->method == NULL) || (b->method->bgets == NULL)) {
BIOerr(BIO_F_BIO_GETS, BIO_R_UNSUPPORTED_METHOD);
- return (-2);
+ return -2;
}
if (size < 0) {
if (!b->init) {
BIOerr(BIO_F_BIO_GETS, BIO_R_UNINITIALIZED);
- return (-2);
+ return -2;
}
ret = b->method->bgets(b, buf, size);
int i;
i = iarg;
- return (BIO_ctrl(b, cmd, larg, (char *)&i));
+ return BIO_ctrl(b, cmd, larg, (char *)&i);
}
void *BIO_ptr_ctrl(BIO *b, int cmd, long larg)
void *p = NULL;
if (BIO_ctrl(b, cmd, larg, (char *)&p) <= 0)
- return (NULL);
+ return NULL;
else
- return (p);
+ return p;
}
long BIO_ctrl(BIO *b, int cmd, long larg, void *parg)
return ret;
}
-long BIO_callback_ctrl(BIO *b, int cmd,
- void (*fp) (struct bio_st *, int, const char *, int,
- long, long))
+long BIO_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp)
{
long ret;
if (b == NULL)
- return (0);
+ return 0;
- if ((b->method == NULL) || (b->method->callback_ctrl == NULL)) {
+ if ((b->method == NULL) || (b->method->callback_ctrl == NULL)
+ || (cmd != BIO_CTRL_SET_CALLBACK)) {
BIOerr(BIO_F_BIO_CALLBACK_CTRL, BIO_R_UNSUPPORTED_METHOD);
- return (-2);
+ return -2;
}
if (b->callback != NULL || b->callback_ex != NULL) {
BIO *lb;
if (b == NULL)
- return (bio);
+ return bio;
lb = b;
while (lb->next_bio != NULL)
lb = lb->next_bio;
bio->prev_bio = lb;
/* called to do internal processing */
BIO_ctrl(b, BIO_CTRL_PUSH, 0, lb);
- return (b);
+ return b;
}
/* Remove the first and return the rest */
BIO *ret;
if (b == NULL)
- return (NULL);
+ return NULL;
ret = b->next_bio;
BIO_ctrl(b, BIO_CTRL_POP, 0, b);
b->next_bio = NULL;
b->prev_bio = NULL;
- return (ret);
+ return ret;
}
BIO *BIO_get_retry_BIO(BIO *bio, int *reason)
}
if (reason != NULL)
*reason = last->retry_reason;
- return (last);
+ return last;
}
int BIO_get_retry_reason(BIO *bio)
{
- return (bio->retry_reason);
+ return bio->retry_reason;
}
void BIO_set_retry_reason(BIO *bio, int reason)
if (!mask) {
if (mt & type)
- return (bio);
+ return bio;
} else if (mt == type)
- return (bio);
+ return bio;
}
bio = bio->next_bio;
} while (bio != NULL);
- return (NULL);
+ return NULL;
}
BIO *BIO_next(BIO *b)
eoc = new_bio;
}
}
- return (ret);
+ return ret;
err:
BIO_free_all(ret);
- return (NULL);
+ return NULL;
}
void BIO_copy_next_retry(BIO *b)
int BIO_set_ex_data(BIO *bio, int idx, void *data)
{
- return (CRYPTO_set_ex_data(&(bio->ex_data), idx, data));
+ return CRYPTO_set_ex_data(&(bio->ex_data), idx, data);
}
-void *BIO_get_ex_data(BIO *bio, int idx)
+void *BIO_get_ex_data(const BIO *bio, int idx)
{
- return (CRYPTO_get_ex_data(&(bio->ex_data), idx));
+ return CRYPTO_get_ex_data(&(bio->ex_data), idx);
}
uint64_t BIO_number_read(BIO *bio)
CRYPTO_THREAD_lock_free(bio_type_lock);
bio_type_lock = NULL;
}
+
+/* Internal variant of the below BIO_wait() not calling BIOerr() */
+static int bio_wait(BIO *bio, time_t max_time, unsigned int nap_milliseconds)
+{
+#ifndef OPENSSL_NO_SOCK
+ int fd;
+#endif
+ long sec_diff;
+
+ if (max_time == 0) /* no timeout */
+ return 1;
+
+#ifndef OPENSSL_NO_SOCK
+ if (BIO_get_fd(bio, &fd) > 0 && fd < FD_SETSIZE)
+ return BIO_socket_wait(fd, BIO_should_read(bio), max_time);
+#endif
+ /* fall back to polling since no sockets are available */
+
+ sec_diff = (long)(max_time - time(NULL)); /* might overflow */
+ if (sec_diff < 0)
+ return 0; /* clearly timeout */
+
+ /* now take a nap at most the given number of milliseconds */
+ if (sec_diff == 0) { /* we are below the 1 seconds resolution of max_time */
+ if (nap_milliseconds > 1000)
+ nap_milliseconds = 1000;
+ } else { /* for sec_diff > 0, take min(sec_diff * 1000, nap_milliseconds) */
+ if ((unsigned long)sec_diff * 1000 < nap_milliseconds)
+ nap_milliseconds = (unsigned int)sec_diff * 1000;
+ }
+ ossl_sleep(nap_milliseconds);
+ return 1;
+}
+
+/*-
+ * Wait on (typically socket-based) BIO at most until max_time.
+ * Succeed immediately if max_time == 0.
+ * If sockets are not available support polling: succeed after waiting at most
+ * the number of nap_milliseconds in order to avoid a tight busy loop.
+ * Call BIOerr(...) on timeout or error.
+ * Returns -1 on error, 0 on timeout, and 1 on success.
+ */
+int BIO_wait(BIO *bio, time_t max_time, unsigned int nap_milliseconds)
+{
+ int rv = bio_wait(bio, max_time, nap_milliseconds);
+
+ if (rv <= 0)
+ BIOerr(0, rv == 0 ? BIO_R_TRANSFER_TIMEOUT : BIO_R_TRANSFER_ERROR);
+ return rv;
+}
+
+/*
+ * Connect via given BIO using BIO_do_connect() until success/timeout/error.
+ * Parameter timeout == 0 means no timeout, < 0 means exactly one try.
+ * For non-blocking and potentially even non-socket BIOs perform polling with
+ * the given density: between polls sleep nap_milliseconds using BIO_wait()
+ * in order to avoid a tight busy loop.
+ * Returns -1 on error, 0 on timeout, and 1 on success.
+ */
+int BIO_do_connect_retry(BIO *bio, int timeout, int nap_milliseconds)
+{
+ int blocking = timeout <= 0;
+ time_t max_time = timeout > 0 ? time(NULL) + timeout : 0;
+ int rv;
+
+ if (bio == NULL) {
+ BIOerr(0, ERR_R_PASSED_NULL_PARAMETER);
+ return -1;
+ }
+
+ if (nap_milliseconds < 0)
+ nap_milliseconds = 100;
+ BIO_set_nbio(bio, !blocking);
+
+ retry:
+ rv = BIO_do_connect(bio); /* This may indirectly call ERR_clear_error(); */
+
+ if (rv <= 0) { /* could be timeout or retryable error or fatal error */
+ int err = ERR_peek_last_error();
+ int reason = ERR_GET_REASON(err);
+ int do_retry = BIO_should_retry(bio); /* may be 1 only if !blocking */
+
+ if (ERR_GET_LIB(err) == ERR_LIB_BIO) {
+ switch (reason) {
+ case ERR_R_SYS_LIB:
+ /*
+ * likely retryable system error occurred, which may be
+ * EAGAIN (resource temporarily unavailable) some 40 secs after
+ * calling getaddrinfo(): Temporary failure in name resolution
+ * or a premature ETIMEDOUT, some 30 seconds after connect()
+ */
+ case BIO_R_CONNECT_ERROR:
+ case BIO_R_NBIO_CONNECT_ERROR:
+ /* some likely retryable connection error occurred */
+ (void)BIO_reset(bio); /* often needed to avoid retry failure */
+ do_retry = 1;
+ break;
+ default:
+ break;
+ }
+ }
+ if (timeout >= 0 && do_retry) {
+ ERR_clear_error(); /* using ERR_pop_to_mark() would be cleaner */
+ /* will not actually wait if timeout == 0 (i.e., blocking BIO): */
+ rv = bio_wait(bio, max_time, nap_milliseconds);
+ if (rv > 0)
+ goto retry;
+ BIOerr(0, rv == 0 ? BIO_R_CONNECT_TIMEOUT : BIO_R_CONNECT_ERROR);
+ } else {
+ rv = -1;
+ if (err == 0) /* missing error queue entry */
+ BIOerr(0, BIO_R_CONNECT_ERROR); /* workaround: general error */
+ }
+ }
+
+ return rv;
+}
projects / openssl.git / blobdiff