Breaking Change: merge BoringSSL branch into master

runtime/bin/net/nss_memio.cc

Index: runtime/bin/net/nss_memio.cc
diff --git a/runtime/bin/net/nss_memio.cc b/runtime/bin/net/nss_memio.cc
deleted file mode 100644
index f8f4f8204f49dfd91156b14a5a1e2409dfc854d3..0000000000000000000000000000000000000000
--- a/runtime/bin/net/nss_memio.cc
+++ /dev/null
@@ -1,538 +0,0 @@
-// Copyright (c) 2008 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-// Written in NSPR style to also be suitable for adding to the NSS demo suite
-
-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-// This file is a modified copy of Chromium's src/net/base/nss_memio.c.
-// char* has been changed to uint8_t* everywhere, and C++ casts are used.
-// Revision 291806 (this should agree with "nss_rev" in DEPS).
-
-
-/* memio is a simple NSPR I/O layer that lets you decouple NSS from
- * the real network.  It's rather like openssl's memory bio,
- * and is useful when your app absolutely, positively doesn't
- * want to let NSS do its own networking.
- */
-#include "bin/net/nss_memio.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "prerror.h"
-#include "prinit.h"
-#include "prlog.h"
-
-/*--------------- private memio types -----------------------*/
-
-/*----------------------------------------------------------------------
- Simple private circular buffer class.  Size cannot be changed once allocated.
-----------------------------------------------------------------------*/
-
-struct memio_buffer {
-    int head;     /* where to take next byte out of buf */
-    int tail;     /* where to put next byte into buf */
-    int bufsize;  /* number of bytes allocated to buf */
-    /* TODO(port): error handling is pessimistic right now.
-     * Once an error is set, the socket is considered broken
-     * (PR_WOULD_BLOCK_ERROR not included).
-     */
-    PRErrorCode last_err;
-    uint8_t* buf;
-};
-
-
-/* The 'secret' field of a PRFileDesc created by memio_CreateIOLayer points
- * to one of these.
- * In the public header, we use struct memio_Private as a typesafe alias
- * for this.  This causes a few ugly typecasts in the private file, but
- * seems safer.
- */
-struct PRFilePrivate {
-    /* read requests are satisfied from this buffer */
-    struct memio_buffer readbuf;
-
-    /* write requests are satisfied from this buffer */
-    struct memio_buffer writebuf;
-
-    /* SSL needs to know socket peer's name */
-    PRNetAddr peername;
-
-    /* if set, empty I/O returns EOF instead of EWOULDBLOCK */
-    int eof;
-
-    /* if set, the number of bytes requested from readbuf that were not
-     * fulfilled (due to readbuf being empty) */
-    int read_requested;
-};
-
-/*--------------- private memio_buffer functions ---------------------*/
-
-/* Forward declarations.  */
-
-/* Allocate a memio_buffer of given size. */
-static void memio_buffer_new(struct memio_buffer *mb, int size);
-
-/* Deallocate a memio_buffer allocated by memio_buffer_new. */
-static void memio_buffer_destroy(struct memio_buffer *mb);
-
-/* How many bytes can be read out of the buffer without wrapping */
-static int memio_buffer_used_contiguous(const struct memio_buffer *mb);
-
-/* How many bytes exist after the wrap? */
-static int memio_buffer_wrapped_bytes(const struct memio_buffer *mb);
-
-/* How many bytes can be written into the buffer without wrapping */
-static int memio_buffer_unused_contiguous(const struct memio_buffer *mb);
-
-/* Write n bytes into the buffer.  Returns number of bytes written. */
-static int memio_buffer_put(struct memio_buffer *mb, const uint8_t* buf, int n);
-
-/* Read n bytes from the buffer.  Returns number of bytes read. */
-static int memio_buffer_get(struct memio_buffer *mb, uint8_t* buf, int n);
-
-/* Allocate a memio_buffer of given size. */
-static void memio_buffer_new(struct memio_buffer *mb, int size) {
-    mb->head = 0;
-    mb->tail = 0;
-    mb->bufsize = size;
-    mb->buf = static_cast<uint8_t*>(malloc(size));
-}
-
-/* Deallocate a memio_buffer allocated by memio_buffer_new. */
-static void memio_buffer_destroy(struct memio_buffer *mb) {
-    free(mb->buf);
-    mb->buf = NULL;
-    mb->bufsize = 0;
-    mb->head = 0;
-    mb->tail = 0;
-}
-
-/* How many bytes can be read out of the buffer without wrapping */
-static int memio_buffer_used_contiguous(const struct memio_buffer *mb) {
-    return (((mb->tail >= mb->head) ? mb->tail : mb->bufsize) - mb->head);
-}
-
-/* How many bytes exist after the wrap? */
-static int memio_buffer_wrapped_bytes(const struct memio_buffer *mb) {
-    return (mb->tail >= mb->head) ? 0 : mb->tail;
-}
-
-/* How many bytes can be written into the buffer without wrapping */
-static int memio_buffer_unused_contiguous(const struct memio_buffer *mb) {
-    if (mb->head > mb->tail) return mb->head - mb->tail - 1;
-    return mb->bufsize - mb->tail - (mb->head == 0);
-}
-
-/* Write n bytes into the buffer.  Returns number of bytes written. */
-static int memio_buffer_put(struct memio_buffer *mb,
-                            const uint8_t* buf,
-                            int n) {
-    int len;
-    int transferred = 0;
-
-    /* Handle part before wrap */
-    len = PR_MIN(n, memio_buffer_unused_contiguous(mb));
-    if (len > 0) {
-        /* Buffer not full */
-        memmove(&mb->buf[mb->tail], buf, len);
-        mb->tail += len;
-        if (mb->tail == mb->bufsize)
-            mb->tail = 0;
-        n -= len;
-        buf += len;
-        transferred += len;
-
-        /* Handle part after wrap */
-        len = PR_MIN(n, memio_buffer_unused_contiguous(mb));
-        if (len > 0) {
-            /* Output buffer still not full, input buffer still not empty */
-            memmove(&mb->buf[mb->tail], buf, len);
-            mb->tail += len;
-            if (mb->tail == mb->bufsize)
-                mb->tail = 0;
-                transferred += len;
-        }
-    }
-
-    return transferred;
-}
-
-
-/* Read n bytes from the buffer.  Returns number of bytes read. */
-static int memio_buffer_get(struct memio_buffer *mb, uint8_t* buf, int n) {
-    int len;
-    int transferred = 0;
-
-    /* Handle part before wrap */
-    len = PR_MIN(n, memio_buffer_used_contiguous(mb));
-    if (len) {
-        memmove(buf, &mb->buf[mb->head], len);
-        mb->head += len;
-        if (mb->head == mb->bufsize)
-            mb->head = 0;
-        n -= len;
-        buf += len;
-        transferred += len;
-
-        /* Handle part after wrap */
-        len = PR_MIN(n, memio_buffer_used_contiguous(mb));
-        if (len) {
-        memmove(buf, &mb->buf[mb->head], len);
-        mb->head += len;
-            if (mb->head == mb->bufsize)
-                mb->head = 0;
-                transferred += len;
-        }
-    }
-
-    return transferred;
-}
-
-/*--------------- private memio functions -----------------------*/
-
-static PRStatus PR_CALLBACK memio_Close(PRFileDesc *fd) {
-    struct PRFilePrivate *secret = fd->secret;
-    memio_buffer_destroy(&secret->readbuf);
-    memio_buffer_destroy(&secret->writebuf);
-    free(secret);
-    fd->dtor(fd);
-    return PR_SUCCESS;
-}
-
-static PRStatus PR_CALLBACK memio_Shutdown(PRFileDesc *fd, PRIntn how) {
-    /* TODO: pass shutdown status to app somehow */
-    return PR_SUCCESS;
-}
-
-/* If there was a network error in the past taking bytes
- * out of the buffer, return it to the next call that
- * tries to read from an empty buffer.
- */
-static int PR_CALLBACK memio_Recv(PRFileDesc *fd,
-                                  uint8_t *buf,
-                                  PRInt32 len,
-                                  PRIntn flags,
-                                  PRIntervalTime timeout) {
-    struct PRFilePrivate *secret;
-    struct memio_buffer *mb;
-    int rv;
-
-    if (flags) {
-        PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
-        return -1;
-    }
-
-    secret = fd->secret;
-    mb = &secret->readbuf;
-    PR_ASSERT(mb->bufsize);
-    rv = memio_buffer_get(mb, buf, len);
-    if (rv == 0 && !secret->eof) {
-        secret->read_requested = len;
-        /* If there is no more data in the buffer, report any pending errors
-         * that were previously observed. Note that both the readbuf and the
-         * writebuf are checked for errors, since the application may have
-         * encountered a socket error while writing that would otherwise not
-         * be reported until the application attempted to write again - which
-         * it may never do.
-         */
-        if (mb->last_err)
-            PR_SetError(mb->last_err, 0);
-        else if (secret->writebuf.last_err)
-            PR_SetError(secret->writebuf.last_err, 0);
-        else
-            PR_SetError(PR_WOULD_BLOCK_ERROR, 0);
-        return -1;
-    }
-
-    secret->read_requested = 0;
-    return rv;
-}
-
-static int PR_CALLBACK memio_Read(PRFileDesc *fd, uint8_t *buf, PRInt32 len) {
-    /* pull bytes from buffer */
-    return memio_Recv(fd, buf, len, 0, PR_INTERVAL_NO_TIMEOUT);
-}
-
-static int PR_CALLBACK memio_Send(PRFileDesc *fd,
-                                  const uint8_t *buf,
-                                  PRInt32 len,
-                                  PRIntn flags,
-                                  PRIntervalTime timeout) {
-    struct PRFilePrivate *secret;
-    struct memio_buffer *mb;
-    int rv;
-
-    secret = fd->secret;
-    mb = &secret->writebuf;
-    PR_ASSERT(mb->bufsize);
-
-    /* Note that the read error state is not reported, because it cannot be
-     * reported until all buffered data has been read. If there is an error
-     * with the next layer, attempting to call Send again will report the
-     * error appropriately.
-     */
-    if (mb->last_err) {
-        PR_SetError(mb->last_err, 0);
-        return -1;
-    }
-    rv = memio_buffer_put(mb, buf, len);
-    if (rv == 0) {
-        PR_SetError(PR_WOULD_BLOCK_ERROR, 0);
-        return -1;
-    }
-    return rv;
-}
-
-static int PR_CALLBACK memio_Write(PRFileDesc *fd,
-                                   const uint8_t *buf,
-                                   PRInt32 len) {
-    /* append bytes to buffer */
-    return memio_Send(fd, buf, len, 0, PR_INTERVAL_NO_TIMEOUT);
-}
-
-static PRStatus PR_CALLBACK memio_GetPeerName(PRFileDesc *fd, PRNetAddr *addr) {
-    /* TODO: fail if memio_SetPeerName has not been called */
-    struct PRFilePrivate *secret = fd->secret;
-    *addr = secret->peername;
-    return PR_SUCCESS;
-}
-
-static PRStatus memio_GetSocketOption(PRFileDesc *fd,
-                                      PRSocketOptionData *data) {
-    /*
-     * Even in the original version for real tcp sockets,
-     * PR_SockOpt_Nonblocking is a special case that does not
-     * translate to a getsockopt() call
-     */
-    if (PR_SockOpt_Nonblocking == data->option) {
-        data->value.non_blocking = PR_TRUE;
-        return PR_SUCCESS;
-    }
-    PR_SetError(PR_OPERATION_NOT_SUPPORTED_ERROR, 0);
-    return PR_FAILURE;
-}
-
-/*--------------- private memio data -----------------------*/
-
-/*
- * Implement just the bare minimum number of methods needed to make ssl happy.
- *
- * Oddly, PR_Recv calls ssl_Recv calls ssl_SocketIsBlocking calls
- * PR_GetSocketOption, so we have to provide an implementation of
- * PR_GetSocketOption that just says "I'm nonblocking".
- */
-
-static struct PRIOMethods  memio_layer_methods = {
-    PR_DESC_LAYERED,
-    memio_Close,
-    (PRReadFN)memio_Read,
-    (PRWriteFN)memio_Write,
-    NULL,
-    NULL,
-    NULL,
-    NULL,
-    NULL,
-    NULL,
-    NULL,
-    NULL,
-    NULL,
-    NULL,
-    NULL,
-    NULL,
-    memio_Shutdown,
-    (PRRecvFN)memio_Recv,
-    (PRSendFN)memio_Send,
-    NULL,
-    NULL,
-    NULL,
-    NULL,
-    NULL,
-    NULL,
-    memio_GetPeerName,
-    NULL,
-    NULL,
-    memio_GetSocketOption,
-    NULL,
-    NULL,
-    NULL,
-    NULL,
-    NULL,
-    NULL,
-    NULL,
-};
-
-static PRDescIdentity memio_identity = PR_INVALID_IO_LAYER;
-
-static PRStatus memio_InitializeLayerName(void) {
-    memio_identity = PR_GetUniqueIdentity("memio");
-    return PR_SUCCESS;
-}
-
-/*--------------- public memio functions -----------------------*/
-
-PRFileDesc *memio_CreateIOLayer(int readbufsize, int writebufsize) {
-    PRFileDesc *fd;
-    struct PRFilePrivate *secret;
-    static PRCallOnceType once;
-
-    PR_CallOnce(&once, memio_InitializeLayerName);
-
-    fd = PR_CreateIOLayerStub(memio_identity, &memio_layer_methods);
-    secret = static_cast<PRFilePrivate*>(malloc(sizeof(struct PRFilePrivate)));
-    memset(secret, 0, sizeof(*secret));
-
-    memio_buffer_new(&secret->readbuf, readbufsize);
-    memio_buffer_new(&secret->writebuf, writebufsize);
-    fd->secret = secret;
-    return fd;
-}
-
-void memio_SetPeerName(PRFileDesc* fd, const PRNetAddr* peername) {
-    PRFileDesc *memiofd = PR_GetIdentitiesLayer(fd, memio_identity);
-    struct PRFilePrivate *secret = memiofd->secret;
-    secret->peername = *peername;
-}
-
-memio_Private* memio_GetSecret(PRFileDesc* fd) {
-  PRFileDesc* memiofd = PR_GetIdentitiesLayer(fd, memio_identity);
-  struct PRFilePrivate *secret =  memiofd->secret;
-  return reinterpret_cast<memio_Private*>(secret);
-}
-
-int memio_GetReadRequest(memio_Private *secret) {
-  return reinterpret_cast<PRFilePrivate*>(secret)->read_requested;
-}
-
-int memio_GetReadParams(memio_Private* secret, uint8_t** buf) {
-  struct memio_buffer* mb =
-      &(reinterpret_cast<PRFilePrivate*>(secret)->readbuf);
-  PR_ASSERT(mb->bufsize);
-
-  *buf = &mb->buf[mb->tail];
-  return memio_buffer_unused_contiguous(mb);
-}
-
-int memio_GetReadableBufferSize(memio_Private *secret) {
-  struct memio_buffer* mb =
-      &(reinterpret_cast<PRFilePrivate*>(secret)->readbuf);
-  PR_ASSERT(mb->bufsize);
-
-  return memio_buffer_used_contiguous(mb);
-}
-
-void memio_PutReadResult(memio_Private *secret, int bytes_read) {
-  struct memio_buffer* mb =
-      &(reinterpret_cast<PRFilePrivate*>(secret)->readbuf);
-  PR_ASSERT(mb->bufsize);
-
-  if (bytes_read > 0) {
-    mb->tail += bytes_read;
-    if (mb->tail == mb->bufsize)
-      mb->tail = 0;
-  } else if (bytes_read == 0) {
-    /* Record EOF condition and report to caller when buffer runs dry */
-    reinterpret_cast<PRFilePrivate*>(secret)->eof = PR_TRUE;
-  } else /* if (bytes_read < 0) */ {
-    mb->last_err = bytes_read;
-  }
-}
-
-int memio_GetWriteParams(memio_Private *secret,
-                          const uint8_t** buf1, unsigned int *len1,
-                          const uint8_t** buf2, unsigned int *len2) {
-  struct memio_buffer* mb =
-      &(reinterpret_cast<PRFilePrivate*>(secret)->writebuf);
-  PR_ASSERT(mb->bufsize);
-
-  if (mb->last_err)
-    return mb->last_err;
-
-  *buf1 = &mb->buf[mb->head];
-  *len1 = memio_buffer_used_contiguous(mb);
-  *buf2 = mb->buf;
-  *len2 = memio_buffer_wrapped_bytes(mb);
-  return 0;
-}
-
-void memio_PutWriteResult(memio_Private *secret, int bytes_written) {
-  struct memio_buffer* mb =
-      &(reinterpret_cast<PRFilePrivate*>(secret)->writebuf);
-  PR_ASSERT(mb->bufsize);
-
-  if (bytes_written > 0) {
-    mb->head += bytes_written;
-    if (mb->head >= mb->bufsize)
-      mb->head -= mb->bufsize;
-  } else if (bytes_written < 0) {
-    mb->last_err = bytes_written;
-  }
-}
-
-/*--------------- private memio_buffer self-test -----------------*/
-
-/* Even a trivial unit test is very helpful when doing circular buffers. */
-/*#define TRIVIAL_SELF_TEST*/
-#ifdef TRIVIAL_SELF_TEST
-
-#define TEST_BUFLEN 7
-
-#define CHECKEQ(a, b) { \
-    if ((a) != (b)) { \
-        printf("%d != %d, Test failed line %d\n", a, b, __LINE__); \
-        exit(1); \
-    } \
-}
-
-#define FROM_STR(a) reinterpret_cast<const uint8_t*>(a)
-
-int main() {
-    struct memio_buffer mb;
-    uint8_t buf[100];
-    int i;
-
-    memio_buffer_new(&mb, TEST_BUFLEN);
-
-    CHECKEQ(memio_buffer_unused_contiguous(&mb), TEST_BUFLEN-1);
-    CHECKEQ(memio_buffer_used_contiguous(&mb), 0);
-
-    CHECKEQ(memio_buffer_put(&mb, FROM_STR("howdy"), 5), 5);
-
-    CHECKEQ(memio_buffer_unused_contiguous(&mb), TEST_BUFLEN-1-5);
-    CHECKEQ(memio_buffer_used_contiguous(&mb), 5);
-    CHECKEQ(memio_buffer_wrapped_bytes(&mb), 0);
-
-    CHECKEQ(memio_buffer_put(&mb, FROM_STR("!"), 1), 1);
-
-    CHECKEQ(memio_buffer_unused_contiguous(&mb), 0);
-    CHECKEQ(memio_buffer_used_contiguous(&mb), 6);
-    CHECKEQ(memio_buffer_wrapped_bytes(&mb), 0);
-
-    CHECKEQ(memio_buffer_get(&mb, buf, 6), 6);
-    CHECKEQ(memcmp(buf, FROM_STR("howdy!"), 6), 0);
-
-    CHECKEQ(memio_buffer_unused_contiguous(&mb), 1);
-    CHECKEQ(memio_buffer_used_contiguous(&mb), 0);
-
-    CHECKEQ(memio_buffer_put(&mb, FROM_STR("01234"), 5), 5);
-
-    CHECKEQ(memio_buffer_used_contiguous(&mb), 1);
-    CHECKEQ(memio_buffer_wrapped_bytes(&mb), 4);
-    CHECKEQ(memio_buffer_unused_contiguous(&mb), TEST_BUFLEN-1-5);
-
-    CHECKEQ(memio_buffer_put(&mb, FROM_STR("5"), 1), 1);
-
-    CHECKEQ(memio_buffer_unused_contiguous(&mb), 0);
-    CHECKEQ(memio_buffer_used_contiguous(&mb), 1);
-
-    /* TODO: add more cases */
-
-    printf("Test passed\n");
-    exit(0);
-}
-
-#endif