static int send_packet(PortConnection * conn, char * buffer, size_t size) {
JsonWriteBinaryState state;
assert (is_dispatch_thread());
assert (conn->pending_write_request < MAX_STREAM_WRITE);
protocol_send_command(conn->server->channel, "Streams", "write", write_stream_done,
conn);
json_write_string(&conn->server->channel->out, conn->out_stream_id);
write_stream(&conn->server->channel->out, 0);
json_write_long(&conn->server->channel->out, size);
write_stream(&conn->server->channel->out, MARKER_EOA);
json_write_binary_start(&state, &conn->server->channel->out, size);
json_write_binary_data(&state, buffer, size);
json_write_binary_end(&state);
write_stream(&conn->server->channel->out, MARKER_EOA);
write_stream(&conn->server->channel->out, MARKER_EOM);
conn->pending_write_request ++;
if (conn->pending_write_request == MAX_STREAM_WRITE) {
return 0;
}
else {
send_packet_callback(conn, 0);
}
return 0;
}
static void send_read_reply(StreamClient * client, char * token, size_t size) {
VirtualStream * stream = client->stream;
Channel * c = client->channel;
unsigned lost = 0;
unsigned read1 = 0;
unsigned read2 = 0;
int eos = 0;
char * data1 = NULL;
char * data2 = NULL;
unsigned pos = 0;
unsigned len = (stream->buf_inp + stream->buf_len - stream->buf_out) % stream->buf_len;
assert(len > 0 || stream->eos);
assert(client->pos <= stream->pos);
if ((uint64_t)len < stream->pos - client->pos) {
lost = (long)(stream->pos - client->pos - len);
}
else {
len = (unsigned)(stream->pos - client->pos);
}
pos = (stream->buf_inp + stream->buf_len - len) % stream->buf_len;
if (len > size) len = size;
data1 = stream->buf + pos;
if (pos + len <= stream->buf_len) {
read1 = len;
}
else {
read1 = stream->buf_len - pos;
data2 = stream->buf;
read2 = len - read1;
}
assert(read1 + read2 == len);
client->pos += lost + read1 + read2;
assert(client->pos <= stream->pos);
if (client->pos == stream->pos && stream->eos) eos = 1;
assert(eos || lost + read1 + read2 > 0);
write_stringz(&c->out, "R");
write_stringz(&c->out, token);
if (read1 + read2 > 0) {
JsonWriteBinaryState state;
json_write_binary_start(&state, &c->out, read1 + read2);
json_write_binary_data(&state, data1, read1);
json_write_binary_data(&state, data2, read2);
json_write_binary_end(&state);
write_stream(&c->out, 0);
}
else {
write_stringz(&c->out, "null");
}
write_errno(&c->out, 0);
json_write_long(&c->out, lost);
write_stream(&c->out, 0);
json_write_boolean(&c->out, eos);
write_stream(&c->out, 0);
write_stream(&c->out, MARKER_EOM);
flush_stream(&c->out);
}
static void safe_memory_get(void * parm) {
MemoryCommandArgs * args = (MemoryCommandArgs *)parm;
Channel * c = args->c;
Context * ctx = args->ctx;
if (!is_channel_closed(c)) {
Trap trap;
if (set_trap(&trap)) {
OutputStream * out = &args->c->out;
char * token = args->token;
ContextAddress addr0 = args->addr;
ContextAddress addr = args->addr;
unsigned long size = args->size;
unsigned long pos = 0;
char buf[BUF_SIZE];
int err = 0;
MemoryErrorInfo err_info;
JsonWriteBinaryState state;
memset(&err_info, 0, sizeof(err_info));
if (ctx->exiting || ctx->exited) err = ERR_ALREADY_EXITED;
write_stringz(out, "R");
write_stringz(out, token);
json_write_binary_start(&state, out, size);
while (pos < size) {
int rd = size - pos;
if (rd > BUF_SIZE) rd = BUF_SIZE;
/* TODO: word size, mode */
memset(buf, 0, rd);
if (err == 0) {
if (context_read_mem(ctx, addr, buf, rd) < 0) {
err = errno;
#if ENABLE_ExtendedMemoryErrorReports
context_get_mem_error_info(&err_info);
#endif
}
else {
addr += rd;
}
}
json_write_binary_data(&state, buf, rd);
pos += rd;
}
json_write_binary_end(&state);
write_stream(out, 0);
write_errno(out, err);
if (err == 0) {
write_stringz(out, "null");
}
else {
write_ranges(out, addr0, (int)(addr - addr0), BYTE_CANNOT_READ, &err_info);
}
write_stream(out, MARKER_EOM);
clear_trap(&trap);
}
else {
trace(LOG_ALWAYS, "Exception in Memory.get: %s", errno_to_str(trap.error));
channel_close(c);
}
}
channel_unlock(c);
context_unlock(ctx);
loc_free(args);
}
