adding pods method of package managing
This commit is contained in:
talksik
+488
@@ -0,0 +1,488 @@
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/* ====================================================================
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* Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* [email protected].
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* ([email protected]). This product includes software written by Tim
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* Hudson ([email protected]). */
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#include <openssl_grpc/bio.h>
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#include <assert.h>
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#include <string.h>
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#include <openssl_grpc/err.h>
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#include <openssl_grpc/mem.h>
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#include "../internal.h"
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struct bio_bio_st {
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BIO *peer; // NULL if buf == NULL.
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// If peer != NULL, then peer->ptr is also a bio_bio_st,
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// and its "peer" member points back to us.
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// peer != NULL iff init != 0 in the BIO.
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// This is for what we write (i.e. reading uses peer's struct):
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int closed; // valid iff peer != NULL
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size_t len; // valid iff buf != NULL; 0 if peer == NULL
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size_t offset; // valid iff buf != NULL; 0 if len == 0
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size_t size;
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uint8_t *buf; // "size" elements (if != NULL)
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size_t request; // valid iff peer != NULL; 0 if len != 0,
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// otherwise set by peer to number of bytes
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// it (unsuccessfully) tried to read,
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// never more than buffer space (size-len) warrants.
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};
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static int bio_new(BIO *bio) {
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struct bio_bio_st *b;
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b = OPENSSL_malloc(sizeof *b);
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if (b == NULL) {
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return 0;
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}
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OPENSSL_memset(b, 0, sizeof(struct bio_bio_st));
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b->size = 17 * 1024; // enough for one TLS record (just a default)
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bio->ptr = b;
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return 1;
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}
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static void bio_destroy_pair(BIO *bio) {
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struct bio_bio_st *b = bio->ptr;
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BIO *peer_bio;
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struct bio_bio_st *peer_b;
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if (b == NULL) {
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return;
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}
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peer_bio = b->peer;
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if (peer_bio == NULL) {
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return;
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}
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peer_b = peer_bio->ptr;
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assert(peer_b != NULL);
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assert(peer_b->peer == bio);
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peer_b->peer = NULL;
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peer_bio->init = 0;
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assert(peer_b->buf != NULL);
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peer_b->len = 0;
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peer_b->offset = 0;
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b->peer = NULL;
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bio->init = 0;
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assert(b->buf != NULL);
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b->len = 0;
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b->offset = 0;
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}
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static int bio_free(BIO *bio) {
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struct bio_bio_st *b;
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if (bio == NULL) {
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return 0;
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}
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b = bio->ptr;
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assert(b != NULL);
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if (b->peer) {
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bio_destroy_pair(bio);
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}
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OPENSSL_free(b->buf);
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OPENSSL_free(b);
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return 1;
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}
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static int bio_read(BIO *bio, char *buf, int size_) {
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size_t size = size_;
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size_t rest;
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struct bio_bio_st *b, *peer_b;
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BIO_clear_retry_flags(bio);
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if (!bio->init) {
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return 0;
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}
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b = bio->ptr;
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assert(b != NULL);
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assert(b->peer != NULL);
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peer_b = b->peer->ptr;
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assert(peer_b != NULL);
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assert(peer_b->buf != NULL);
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peer_b->request = 0; // will be set in "retry_read" situation
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if (buf == NULL || size == 0) {
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return 0;
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}
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if (peer_b->len == 0) {
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if (peer_b->closed) {
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return 0; // writer has closed, and no data is left
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} else {
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BIO_set_retry_read(bio); // buffer is empty
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if (size <= peer_b->size) {
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peer_b->request = size;
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} else {
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// don't ask for more than the peer can
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// deliver in one write
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peer_b->request = peer_b->size;
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}
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return -1;
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}
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}
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// we can read
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if (peer_b->len < size) {
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size = peer_b->len;
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}
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// now read "size" bytes
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rest = size;
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assert(rest > 0);
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// one or two iterations
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do {
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size_t chunk;
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assert(rest <= peer_b->len);
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if (peer_b->offset + rest <= peer_b->size) {
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chunk = rest;
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} else {
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// wrap around ring buffer
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chunk = peer_b->size - peer_b->offset;
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}
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assert(peer_b->offset + chunk <= peer_b->size);
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OPENSSL_memcpy(buf, peer_b->buf + peer_b->offset, chunk);
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peer_b->len -= chunk;
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if (peer_b->len) {
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peer_b->offset += chunk;
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assert(peer_b->offset <= peer_b->size);
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if (peer_b->offset == peer_b->size) {
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peer_b->offset = 0;
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}
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buf += chunk;
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} else {
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// buffer now empty, no need to advance "buf"
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assert(chunk == rest);
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peer_b->offset = 0;
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}
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rest -= chunk;
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} while (rest);
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return size;
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}
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static int bio_write(BIO *bio, const char *buf, int num_) {
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size_t num = num_;
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size_t rest;
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struct bio_bio_st *b;
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BIO_clear_retry_flags(bio);
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if (!bio->init || buf == NULL || num == 0) {
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return 0;
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}
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b = bio->ptr;
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assert(b != NULL);
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assert(b->peer != NULL);
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assert(b->buf != NULL);
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b->request = 0;
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if (b->closed) {
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// we already closed
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OPENSSL_PUT_ERROR(BIO, BIO_R_BROKEN_PIPE);
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return -1;
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}
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assert(b->len <= b->size);
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if (b->len == b->size) {
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BIO_set_retry_write(bio); // buffer is full
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return -1;
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}
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// we can write
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if (num > b->size - b->len) {
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num = b->size - b->len;
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}
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// now write "num" bytes
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rest = num;
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assert(rest > 0);
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// one or two iterations
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do {
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size_t write_offset;
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size_t chunk;
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assert(b->len + rest <= b->size);
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write_offset = b->offset + b->len;
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if (write_offset >= b->size) {
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write_offset -= b->size;
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}
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// b->buf[write_offset] is the first byte we can write to.
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if (write_offset + rest <= b->size) {
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chunk = rest;
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} else {
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// wrap around ring buffer
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chunk = b->size - write_offset;
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}
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OPENSSL_memcpy(b->buf + write_offset, buf, chunk);
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b->len += chunk;
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assert(b->len <= b->size);
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rest -= chunk;
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buf += chunk;
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} while (rest);
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return num;
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}
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static int bio_make_pair(BIO *bio1, BIO *bio2, size_t writebuf1_len,
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size_t writebuf2_len) {
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struct bio_bio_st *b1, *b2;
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assert(bio1 != NULL);
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assert(bio2 != NULL);
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b1 = bio1->ptr;
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b2 = bio2->ptr;
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if (b1->peer != NULL || b2->peer != NULL) {
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OPENSSL_PUT_ERROR(BIO, BIO_R_IN_USE);
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return 0;
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}
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if (b1->buf == NULL) {
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if (writebuf1_len) {
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b1->size = writebuf1_len;
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}
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b1->buf = OPENSSL_malloc(b1->size);
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if (b1->buf == NULL) {
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OPENSSL_PUT_ERROR(BIO, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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b1->len = 0;
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b1->offset = 0;
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}
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if (b2->buf == NULL) {
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if (writebuf2_len) {
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b2->size = writebuf2_len;
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}
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b2->buf = OPENSSL_malloc(b2->size);
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if (b2->buf == NULL) {
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OPENSSL_PUT_ERROR(BIO, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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b2->len = 0;
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b2->offset = 0;
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}
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b1->peer = bio2;
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b1->closed = 0;
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b1->request = 0;
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b2->peer = bio1;
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b2->closed = 0;
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b2->request = 0;
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bio1->init = 1;
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bio2->init = 1;
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return 1;
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}
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static long bio_ctrl(BIO *bio, int cmd, long num, void *ptr) {
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long ret;
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struct bio_bio_st *b = bio->ptr;
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assert(b != NULL);
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switch (cmd) {
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// specific CTRL codes
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case BIO_C_GET_WRITE_BUF_SIZE:
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ret = (long)b->size;
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break;
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case BIO_C_GET_WRITE_GUARANTEE:
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// How many bytes can the caller feed to the next write
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// without having to keep any?
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if (b->peer == NULL || b->closed) {
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ret = 0;
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} else {
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ret = (long)b->size - b->len;
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}
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break;
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case BIO_C_GET_READ_REQUEST:
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// If the peer unsuccessfully tried to read, how many bytes
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// were requested? (As with BIO_CTRL_PENDING, that number
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// can usually be treated as boolean.)
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ret = (long)b->request;
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break;
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case BIO_C_RESET_READ_REQUEST:
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// Reset request. (Can be useful after read attempts
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// at the other side that are meant to be non-blocking,
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// e.g. when probing SSL_read to see if any data is
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// available.)
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b->request = 0;
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ret = 1;
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break;
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case BIO_C_SHUTDOWN_WR:
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// similar to shutdown(..., SHUT_WR)
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b->closed = 1;
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ret = 1;
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break;
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// standard CTRL codes follow
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case BIO_CTRL_GET_CLOSE:
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ret = bio->shutdown;
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break;
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case BIO_CTRL_SET_CLOSE:
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bio->shutdown = (int)num;
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ret = 1;
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break;
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case BIO_CTRL_PENDING:
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if (b->peer != NULL) {
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struct bio_bio_st *peer_b = b->peer->ptr;
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ret = (long)peer_b->len;
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} else {
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ret = 0;
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}
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break;
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case BIO_CTRL_WPENDING:
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ret = 0;
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if (b->buf != NULL) {
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ret = (long)b->len;
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}
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break;
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case BIO_CTRL_FLUSH:
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ret = 1;
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break;
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case BIO_CTRL_EOF: {
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BIO *other_bio = ptr;
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if (other_bio) {
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struct bio_bio_st *other_b = other_bio->ptr;
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assert(other_b != NULL);
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ret = other_b->len == 0 && other_b->closed;
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} else {
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ret = 1;
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}
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} break;
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default:
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ret = 0;
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}
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return ret;
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}
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static const BIO_METHOD methods_biop = {
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BIO_TYPE_BIO, "BIO pair", bio_write, bio_read, NULL /* puts */,
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NULL /* gets */, bio_ctrl, bio_new, bio_free, NULL /* callback_ctrl */,
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};
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static const BIO_METHOD *bio_s_bio(void) { return &methods_biop; }
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int BIO_new_bio_pair(BIO** bio1_p, size_t writebuf1_len,
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BIO** bio2_p, size_t writebuf2_len) {
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BIO *bio1 = BIO_new(bio_s_bio());
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BIO *bio2 = BIO_new(bio_s_bio());
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if (bio1 == NULL || bio2 == NULL ||
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!bio_make_pair(bio1, bio2, writebuf1_len, writebuf2_len)) {
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BIO_free(bio1);
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BIO_free(bio2);
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*bio1_p = NULL;
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*bio2_p = NULL;
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return 0;
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}
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*bio1_p = bio1;
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*bio2_p = bio2;
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return 1;
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}
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size_t BIO_ctrl_get_read_request(BIO *bio) {
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return BIO_ctrl(bio, BIO_C_GET_READ_REQUEST, 0, NULL);
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}
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size_t BIO_ctrl_get_write_guarantee(BIO *bio) {
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return BIO_ctrl(bio, BIO_C_GET_WRITE_GUARANTEE, 0, NULL);
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}
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int BIO_shutdown_wr(BIO *bio) {
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return BIO_ctrl(bio, BIO_C_SHUTDOWN_WR, 0, NULL);
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}
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