static int zlib_body(z_stream* zs, grpc_slice_buffer* input,
grpc_slice_buffer* output,
int (*flate)(z_stream* zs, int flush)) {
int r;
int flush;
size_t i;
grpc_slice outbuf = grpc_slice_malloc(OUTPUT_BLOCK_SIZE);
const uInt uint_max = ~(uInt)0;
GPR_ASSERT(GRPC_SLICE_LENGTH(outbuf) <= uint_max);
zs->avail_out = (uInt)GRPC_SLICE_LENGTH(outbuf);
zs->next_out = GRPC_SLICE_START_PTR(outbuf);
flush = Z_NO_FLUSH;
for (i = 0; i < input->count; i++) {
if (i == input->count - 1) flush = Z_FINISH;
GPR_ASSERT(GRPC_SLICE_LENGTH(input->slices[i]) <= uint_max);
zs->avail_in = (uInt)GRPC_SLICE_LENGTH(input->slices[i]);
zs->next_in = GRPC_SLICE_START_PTR(input->slices[i]);
do {
if (zs->avail_out == 0) {
grpc_slice_buffer_add_indexed(output, outbuf);
outbuf = grpc_slice_malloc(OUTPUT_BLOCK_SIZE);
GPR_ASSERT(GRPC_SLICE_LENGTH(outbuf) <= uint_max);
zs->avail_out = (uInt)GRPC_SLICE_LENGTH(outbuf);
zs->next_out = GRPC_SLICE_START_PTR(outbuf);
}
r = flate(zs, flush);
if (r < 0 && r != Z_BUF_ERROR /* not fatal */) {
gpr_log(GPR_INFO, "zlib error (%d)", r);
goto error;
}
} while (zs->avail_out == 0);
if (zs->avail_in) {
gpr_log(GPR_INFO, "zlib: not all input consumed");
goto error;
}
}
GPR_ASSERT(outbuf.refcount);
outbuf.data.refcounted.length -= zs->avail_out;
grpc_slice_buffer_add_indexed(output, outbuf);
return 1;
error:
grpc_slice_unref(outbuf);
return 0;
}
static void flush_write_staging_buffer(secure_endpoint *ep, uint8_t **cur,
uint8_t **end) {
grpc_slice_buffer_add(&ep->output_buffer, ep->write_staging_buffer);
ep->write_staging_buffer = grpc_slice_malloc(STAGING_BUFFER_SIZE);
*cur = GRPC_SLICE_START_PTR(ep->write_staging_buffer);
*end = GRPC_SLICE_END_PTR(ep->write_staging_buffer);
}
void grpc_chttp2_encode_data(uint32_t id, grpc_slice_buffer *inbuf,
uint32_t write_bytes, int is_eof,
grpc_transport_one_way_stats *stats,
grpc_slice_buffer *outbuf) {
grpc_slice hdr;
uint8_t *p;
static const size_t header_size = 9;
hdr = grpc_slice_malloc(header_size);
p = GRPC_SLICE_START_PTR(hdr);
GPR_ASSERT(write_bytes < (1 << 24));
*p++ = (uint8_t)(write_bytes >> 16);
*p++ = (uint8_t)(write_bytes >> 8);
*p++ = (uint8_t)(write_bytes);
*p++ = GRPC_CHTTP2_FRAME_DATA;
*p++ = is_eof ? GRPC_CHTTP2_DATA_FLAG_END_STREAM : 0;
*p++ = (uint8_t)(id >> 24);
*p++ = (uint8_t)(id >> 16);
*p++ = (uint8_t)(id >> 8);
*p++ = (uint8_t)(id);
grpc_slice_buffer_add(outbuf, hdr);
grpc_slice_buffer_move_first(inbuf, write_bytes, outbuf);
stats->framing_bytes += header_size;
stats->data_bytes += write_bytes;
}
static void win_read(grpc_exec_ctx *exec_ctx, grpc_endpoint *ep,
grpc_slice_buffer *read_slices, grpc_closure *cb) {
grpc_tcp *tcp = (grpc_tcp *)ep;
grpc_winsocket *handle = tcp->socket;
grpc_winsocket_callback_info *info = &handle->read_info;
int status;
DWORD bytes_read = 0;
DWORD flags = 0;
WSABUF buffer;
if (tcp->shutting_down) {
grpc_exec_ctx_sched(exec_ctx, cb,
GRPC_ERROR_CREATE("TCP socket is shutting down"), NULL);
return;
}
tcp->read_cb = cb;
tcp->read_slices = read_slices;
grpc_slice_buffer_reset_and_unref(read_slices);
tcp->read_slice = grpc_slice_malloc(8192);
buffer.len = (ULONG)GRPC_SLICE_LENGTH(
tcp->read_slice); // we know slice size fits in 32bit.
buffer.buf = (char *)GRPC_SLICE_START_PTR(tcp->read_slice);
TCP_REF(tcp, "read");
/* First let's try a synchronous, non-blocking read. */
status =
WSARecv(tcp->socket->socket, &buffer, 1, &bytes_read, &flags, NULL, NULL);
info->wsa_error = status == 0 ? 0 : WSAGetLastError();
/* Did we get data immediately ? Yay. */
if (info->wsa_error != WSAEWOULDBLOCK) {
info->bytes_transfered = bytes_read;
grpc_exec_ctx_sched(exec_ctx, &tcp->on_read, GRPC_ERROR_NONE, NULL);
return;
}
/* Otherwise, let's retry, by queuing a read. */
memset(&tcp->socket->read_info.overlapped, 0, sizeof(OVERLAPPED));
status = WSARecv(tcp->socket->socket, &buffer, 1, &bytes_read, &flags,
&info->overlapped, NULL);
if (status != 0) {
int wsa_error = WSAGetLastError();
if (wsa_error != WSA_IO_PENDING) {
info->wsa_error = wsa_error;
grpc_exec_ctx_sched(exec_ctx, &tcp->on_read,
GRPC_WSA_ERROR(info->wsa_error, "WSARecv"), NULL);
return;
}
}
grpc_socket_notify_on_read(exec_ctx, tcp->socket, &tcp->on_read);
}
grpc_endpoint *grpc_secure_endpoint_create(
struct tsi_frame_protector *protector, grpc_endpoint *transport,
grpc_slice *leftover_slices, size_t leftover_nslices) {
size_t i;
secure_endpoint *ep = (secure_endpoint *)gpr_malloc(sizeof(secure_endpoint));
ep->base.vtable = &vtable;
ep->wrapped_ep = transport;
ep->protector = protector;
grpc_slice_buffer_init(&ep->leftover_bytes);
for (i = 0; i < leftover_nslices; i++) {
grpc_slice_buffer_add(&ep->leftover_bytes,
grpc_slice_ref(leftover_slices[i]));
}
ep->write_staging_buffer = grpc_slice_malloc(STAGING_BUFFER_SIZE);
ep->read_staging_buffer = grpc_slice_malloc(STAGING_BUFFER_SIZE);
grpc_slice_buffer_init(&ep->output_buffer);
grpc_slice_buffer_init(&ep->source_buffer);
ep->read_buffer = NULL;
grpc_closure_init(&ep->on_read, on_read, ep);
gpr_mu_init(&ep->protector_mu);
gpr_ref_init(&ep->ref, 1);
return &ep->base;
}
static void test_varint(uint32_t value, uint32_t prefix_bits, uint8_t prefix_or,
const char *expect_bytes, size_t expect_length) {
uint32_t nbytes = GRPC_CHTTP2_VARINT_LENGTH(value, prefix_bits);
grpc_slice expect =
grpc_slice_from_copied_buffer(expect_bytes, expect_length);
grpc_slice slice;
gpr_log(GPR_DEBUG, "Test: 0x%08x", value);
GPR_ASSERT(nbytes == expect_length);
slice = grpc_slice_malloc(nbytes);
GRPC_CHTTP2_WRITE_VARINT(value, prefix_bits, prefix_or,
GRPC_SLICE_START_PTR(slice), nbytes);
GPR_ASSERT(grpc_slice_cmp(expect, slice) == 0);
grpc_slice_unref(expect);
grpc_slice_unref(slice);
}
void grpc_split_slices(grpc_slice_split_mode mode, grpc_slice *src_slices,
size_t src_slice_count, grpc_slice **dst_slices,
size_t *dst_slice_count) {
size_t i, j;
size_t length;
switch (mode) {
case GRPC_SLICE_SPLIT_IDENTITY:
*dst_slice_count = src_slice_count;
*dst_slices = gpr_malloc(sizeof(grpc_slice) * src_slice_count);
for (i = 0; i < src_slice_count; i++) {
(*dst_slices)[i] = src_slices[i];
grpc_slice_ref((*dst_slices)[i]);
}
break;
case GRPC_SLICE_SPLIT_MERGE_ALL:
*dst_slice_count = 1;
length = 0;
for (i = 0; i < src_slice_count; i++) {
length += GRPC_SLICE_LENGTH(src_slices[i]);
}
*dst_slices = gpr_malloc(sizeof(grpc_slice));
**dst_slices = grpc_slice_malloc(length);
length = 0;
for (i = 0; i < src_slice_count; i++) {
memcpy(GRPC_SLICE_START_PTR(**dst_slices) + length,
GRPC_SLICE_START_PTR(src_slices[i]),
GRPC_SLICE_LENGTH(src_slices[i]));
length += GRPC_SLICE_LENGTH(src_slices[i]);
}
break;
case GRPC_SLICE_SPLIT_ONE_BYTE:
length = 0;
for (i = 0; i < src_slice_count; i++) {
length += GRPC_SLICE_LENGTH(src_slices[i]);
}
*dst_slice_count = length;
*dst_slices = gpr_malloc(sizeof(grpc_slice) * length);
length = 0;
for (i = 0; i < src_slice_count; i++) {
for (j = 0; j < GRPC_SLICE_LENGTH(src_slices[i]); j++) {
(*dst_slices)[length] = grpc_slice_sub(src_slices[i], j, j + 1);
length++;
}
}
break;
}
}
grpc_slice grpc_byte_buffer_reader_readall(grpc_byte_buffer_reader *reader) {
grpc_slice in_slice;
size_t bytes_read = 0;
const size_t input_size = grpc_byte_buffer_length(reader->buffer_out);
grpc_slice out_slice = grpc_slice_malloc(input_size);
uint8_t *const outbuf = GRPC_SLICE_START_PTR(out_slice); /* just an alias */
while (grpc_byte_buffer_reader_next(reader, &in_slice) != 0) {
const size_t slice_length = GRPC_SLICE_LENGTH(in_slice);
memcpy(&(outbuf[bytes_read]), GRPC_SLICE_START_PTR(in_slice), slice_length);
bytes_read += slice_length;
grpc_slice_unref(in_slice);
GPR_ASSERT(bytes_read <= input_size);
}
return out_slice;
}
grpc_slice grpc_grpclb_request_encode(const grpc_grpclb_request *request) {
size_t encoded_length;
pb_ostream_t sizestream;
pb_ostream_t outputstream;
grpc_slice slice;
memset(&sizestream, 0, sizeof(pb_ostream_t));
pb_encode(&sizestream, grpc_lb_v1_LoadBalanceRequest_fields, request);
encoded_length = sizestream.bytes_written;
slice = grpc_slice_malloc(encoded_length);
outputstream =
pb_ostream_from_buffer(GRPC_SLICE_START_PTR(slice), encoded_length);
GPR_ASSERT(pb_encode(&outputstream, grpc_lb_v1_LoadBalanceRequest_fields,
request) != 0);
return slice;
}
grpc_slice grpc_chttp2_ping_create(uint8_t ack, uint8_t *opaque_8bytes) {
grpc_slice slice = grpc_slice_malloc(9 + 8);
uint8_t *p = GRPC_SLICE_START_PTR(slice);
*p++ = 0;
*p++ = 0;
*p++ = 8;
*p++ = GRPC_CHTTP2_FRAME_PING;
*p++ = ack ? 1 : 0;
*p++ = 0;
*p++ = 0;
*p++ = 0;
*p++ = 0;
memcpy(p, opaque_8bytes, 8);
return slice;
}
static grpc_slice *allocate_blocks(size_t num_bytes, size_t slice_size,
size_t *num_blocks, uint8_t *current_data) {
size_t nslices = num_bytes / slice_size + (num_bytes % slice_size ? 1u : 0u);
grpc_slice *slices = gpr_malloc(sizeof(grpc_slice) * nslices);
size_t num_bytes_left = num_bytes;
unsigned i, j;
unsigned char *buf;
*num_blocks = nslices;
for (i = 0; i < nslices; ++i) {
slices[i] = grpc_slice_malloc(slice_size > num_bytes_left ? num_bytes_left
: slice_size);
num_bytes_left -= GRPC_SLICE_LENGTH(slices[i]);
buf = GRPC_SLICE_START_PTR(slices[i]);
for (j = 0; j < GRPC_SLICE_LENGTH(slices[i]); ++j) {
buf[j] = *current_data;
(*current_data)++;
}
}
GPR_ASSERT(num_bytes_left == 0);
return slices;
}
static grpc_slice large_slice(void) {
grpc_slice slice = grpc_slice_malloc(1000000);
memset(GRPC_SLICE_START_PTR(slice), 'x', GRPC_SLICE_LENGTH(slice));
return slice;
}
grpc_slice grpc_slice_from_copied_buffer(const char *source, size_t length) {
grpc_slice slice = grpc_slice_malloc(length);
memcpy(GRPC_SLICE_START_PTR(slice), source, length);
return slice;
}
/* begin a new frame: reserve off header space, remember how many bytes we'd
output before beginning */
static void begin_frame(framer_state *st) {
st->header_idx =
grpc_slice_buffer_add_indexed(st->output, grpc_slice_malloc(9));
st->output_length_at_start_of_frame = st->output->length;
}
