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wireprotocol.py
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wireprotocol.py
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##############################################################################
# Copyright (c) 2009-2012 Hajime Nakagami<nakagami@gmail.com>
# All rights reserved.
# Licensed under the New BSD License
# (http://www.freebsd.org/copyright/freebsd-license.html)
#
# Python DB-API 2.0 module for Firebird.
##############################################################################
import xdrlib, time, datetime, decimal, struct
from firebirdsql.fberrmsgs import messages
from firebirdsql import (DisconnectByPeer,
DatabaseError, InternalError, OperationalError,
ProgrammingError, IntegrityError, DataError, NotSupportedError,
)
from firebirdsql.consts import *
DEBUG = False
INFO_SQL_SELECT_DESCRIBE_VARS = bytes([
isc_info_sql_select,
isc_info_sql_describe_vars,
isc_info_sql_sqlda_seq,
isc_info_sql_type,
isc_info_sql_sub_type,
isc_info_sql_scale,
isc_info_sql_length,
isc_info_sql_null_ind,
isc_info_sql_field,
isc_info_sql_relation,
isc_info_sql_owner,
isc_info_sql_alias,
isc_info_sql_describe_end])
def wire_operation(fn):
if not DEBUG:
return fn
def f(*args):
print('<----', fn, args)
r = fn(*args)
print(fn, '---->')
return r
return f
def bytes_to_bint(b, u=False): # Read as big endian
if u:
fmtmap = {1: 'B', 2: '>H', 4: '>L', 8: '>Q'}
else:
fmtmap = {1: 'b', 2: '>h', 4: '>l', 8: '>q'}
fmt = fmtmap.get(len(b))
if fmt is None:
raise InternalError
return struct.unpack(fmt, b)[0]
def bytes_to_int(b, u=False): # Read as little endian.
if u:
fmtmap = {1: 'B', 2: '<H', 4: '<L', 8: '<Q'}
else:
fmtmap = {1: 'b', 2: '<h', 4: '<l', 8: '<q'}
fmt = fmtmap.get(len(b))
if fmt is None:
raise InternalError
return struct.unpack(fmt, b)[0]
def bint_to_bytes(val, nbytes): # Convert int value to big endian bytes.
v = abs(val)
b = []
for n in range(nbytes):
b.append((v >> (8*(nbytes - n - 1)) & 0xff))
if val < 0:
for i in range(nbytes):
b[i] = ~b[i] + 256
b[-1] += 1
for i in range(nbytes):
if b[nbytes -i -1] == 256:
b[nbytes -i -1] = 0
b[nbytes -i -2] += 1
return bytes(b)
def int_to_bytes(val, nbytes): # Convert int value to little endian bytes.
v = abs(val)
b = []
for n in range(nbytes):
b.append((v >> (8 * n)) & 0xff)
if val < 0:
for i in range(nbytes):
b[i] = ~b[i] + 256
b[0] += 1
for i in range(nbytes):
if b[i] == 256:
b[i] = 0
b[i+1] += 1
return bytes(b)
def byte_to_int(b):
"byte to int"
if PYTHON_MAJOR_VER == 3:
return b
else:
return ord(b)
def recv_channel(sock, nbytes, word_alignment=False):
n = nbytes
if word_alignment and (n % 4):
n += 4 - nbytes % 4 # 4 bytes word alignment
r = bytes([])
while n:
b = sock.recv(n)
r += b
n -= len(b)
return r[:nbytes]
def send_channel(sock, b):
sock.send(b)
def params_to_blr(params):
"Convert parameter array to BLR and values format."
ln = len(params) * 2
blr = bytes([5, 2, 4, 0, ln & 255, ln >> 8])
values = bytes([])
for p in params:
t = type(p)
if ((PYTHON_MAJOR_VER == 2 and t == str) or
(PYTHON_MAJOR_VER == 3 and t == bytes)):
v = p
nbytes = len(v)
pad_length = ((4-nbytes) & 3)
v += bytes([0]) * pad_length
blr += bytes([14, nbytes & 255, nbytes >> 8])
elif t == int:
v = bint_to_bytes(p, 4)
blr += bytes([7, 0])
elif t == decimal.Decimal or t == float:
if t == float:
p = decimal.Decimal(str(p))
(sign, digits, exponent) = p.as_tuple()
v = 0
ln = len(digits)
for i in range(ln):
v += digits[i] * (10 ** (ln -i-1))
if sign:
v *= -1
v = bint_to_bytes(v, 8)
if exponent < 0:
exponent += 256
blr += bytes([16, exponent])
elif t == datetime.date:
v = convert_date(p)
blr += bytes([12])
elif t == datetime.time:
v = convert_time(p)
blr += bytes([13])
elif t == datetime.datetime:
v = convert_timestamp(p)
blr += bytes([35])
elif p == None:
v = bytes([0]) * 8
blr += bytes([9, 0])
values += v
blr += bytes([7, 0])
values += bytes([0]) * 4 if p != None else bytes([0xff,0xff,0x34,0x8c])
blr += bytes([255, 76]) # [blr_end, blr_eoc]
return blr, values
class WireProtocol:
buffer_length = 1024
op_connect = 1
op_exit = 2
op_accept = 3
op_disconnect = 6
op_response = 9
op_attach = 19
op_create = 20
op_detach = 21
op_transaction = 29
op_commit = 30
op_rollback = 31
op_open_blob = 35
op_get_segment = 36
op_close_blob = 39
op_info_database = 40
op_info_transaction = 42
op_batch_segments = 44
op_que_events = 48
op_cancel_events = 49
op_commit_retaining = 50
op_event = 52
op_connect_request = 53
op_aux_connect = 53
op_create_blob2 = 57
op_allocate_statement = 62
op_execute = 63
op_execute_immediate = 64
op_fetch = 65
op_fetch_response = 66
op_free_statement = 67
op_prepare_statement = 68
op_info_sql = 70
op_dummy = 71
op_execute2 = 76
op_sql_response = 78
op_drop_database = 81
op_service_attach = 82
op_service_detach = 83
op_service_info = 84
op_service_start = 85
op_rollback_retaining = 86
charset_map = {
# DB CHAR SET NAME : PYTHON CODEC NAME (CANONICAL)
# --------------------------------------------------------------------------
'OCTETS' : None, # Allow to pass through unchanged.
'UNICODE_FSS' : 'utf_8',
'UTF8' : 'utf_8', # (Firebird 2.0+)
'SJIS_0208' : 'shift_jis',
'EUCJ_0208' : 'euc_jp',
'DOS737' : 'cp737',
'DOS437' : 'cp437',
'DOS850' : 'cp850',
'DOS865' : 'cp865',
'DOS860' : 'cp860',
'DOS863' : 'cp863',
'DOS775' : 'cp775',
'DOS862' : 'cp862',
'DOS864' : 'cp864',
'ISO8859_1' : 'iso8859_1',
'ISO8859_2' : 'iso8859_2',
'ISO8859_3' : 'iso8859_3',
'ISO8859_4' : 'iso8859_4',
'ISO8859_5' : 'iso8859_5',
'ISO8859_6' : 'iso8859_6',
'ISO8859_7' : 'iso8859_7',
'ISO8859_8' : 'iso8859_8',
'ISO8859_9' : 'iso8859_9',
'ISO8859_13' : 'iso8859_13',
'KSC_5601' : 'euc_kr',
'DOS852' : 'cp852',
'DOS857' : 'cp857',
'DOS861' : 'cp861',
'DOS866' : 'cp866',
'DOS869' : 'cp869',
'WIN1250' : 'cp1250',
'WIN1251' : 'cp1251',
'WIN1252' : 'cp1252',
'WIN1253' : 'cp1253',
'WIN1254' : 'cp1254',
'BIG_5' : 'big5',
'GB_2312' : 'gb2312',
'WIN1255' : 'cp1255',
'WIN1256' : 'cp1256',
'WIN1257' : 'cp1257',
'KOI8-R' : 'koi8_r', # (Firebird 2.0+)
'KOI8-U' : 'koi8_u', # (Firebird 2.0+)
'WIN1258' : 'cp1258', # (Firebird 2.0+)
}
def str_to_bytes(self, s):
return s.encode(self.charset_map.get(self.charset, self.charset))
def bytes_to_str(self, b):
"convert bytes array to raw string"
if PYTHON_MAJOR_VER == 3:
return b.decode(self.charset_map.get(self.charset, self.charset))
return b
def bytes_to_ustr(self, b):
"convert bytes array to unicode string"
return b.decode(self.charset_map.get(self.charset, self.charset))
def _parse_status_vector(self):
sql_code = 0
gds_codes = set()
message = ''
n = bytes_to_bint(recv_channel(self.sock, 4))
while n != isc_arg_end:
if n == isc_arg_gds:
gds_code = bytes_to_bint(recv_channel(self.sock, 4))
if gds_code:
gds_codes.add(gds_code)
message += messages.get(gds_code, '@1')
num_arg = 0
elif n == isc_arg_number:
num = bytes_to_bint(recv_channel(self.sock, 4))
if gds_code == 335544436:
sql_code = num
num_arg += 1
message = message.replace('@' + str(num_arg), str(num))
elif n == isc_arg_string or n == isc_arg_interpreted:
nbytes = bytes_to_bint(recv_channel(self.sock, 4))
n = str(recv_channel(self.sock, nbytes, True))
num_arg += 1
message = message.replace('@' + str(num_arg), n)
n = bytes_to_bint(recv_channel(self.sock, 4))
return (gds_codes, sql_code, message)
def _parse_op_response(self):
b = recv_channel(self.sock, 16)
h = bytes_to_bint(b[0:4]) # Object handle
oid = b[4:12] # Object ID
buf_len = bytes_to_bint(b[12:]) # buffer length
buf = recv_channel(self.sock, buf_len, True)
(gds_codes, sql_code, message) = self._parse_status_vector()
if sql_code or message:
raise OperationalError(message, gds_codes, sql_code)
return (h, oid, buf)
def _parse_op_event(self):
b = recv_channel(self.sock, 4096) # too large TODO: read step by step
# TODO: parse event name
db_handle = bytes_to_bint(b[0:4])
event_id = bytes_to_bint(b[-4:])
return (db_handle, event_id, {})
@wire_operation
def _op_connect(self):
p = xdrlib.Packer()
p.pack_int(self.op_connect)
p.pack_int(self.op_attach)
p.pack_int(2) # CONNECT_VERSION2
p.pack_int(1) # Arch type (Generic = 1)
p.pack_string(self.str_to_bytes(self.filename if self.filename else ''))
p.pack_int(1) # Protocol version understood count.
p.pack_bytes(self.uid())
p.pack_int(10) # PROTOCOL_VERSION10
p.pack_int(1) # Arch type (Generic = 1)
p.pack_int(2) # Min type
p.pack_int(3) # Max type
p.pack_int(2) # Preference weight
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_create(self, page_size=4096):
dpb = bytes([1])
s = self.str_to_bytes(self.charset)
dpb += bytes([68, len(s)]) + s
dpb += bytes([48, len(s)]) + s
s = self.str_to_bytes(self.user)
dpb += bytes([28, len(s)]) + s
s = self.str_to_bytes(self.password)
dpb += bytes([29, len(s)]) + s
dpb += bytes([63, 4]) + int_to_bytes(3, 4) # isc_dpb_sql_dialect = 3
dpb += bytes([24, 4]) + bint_to_bytes(1, 4) # isc_dpb_force_write = 1
dpb += bytes([54, 4]) + bint_to_bytes(1, 4) # isc_dpb_overwirte = 1
dpb += bytes([4, 4]) + int_to_bytes(page_size, 4)
p = xdrlib.Packer()
p.pack_int(self.op_create)
p.pack_int(0) # Database Object ID
p.pack_string(self.str_to_bytes(self.filename))
p.pack_bytes(dpb)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_accept(self):
b = recv_channel(self.sock, 4)
while bytes_to_bint(b) == self.op_dummy:
b = recv_channel(self.sock, 4)
assert bytes_to_bint(b) == self.op_accept
b = recv_channel(self.sock, 12)
up = xdrlib.Unpacker(b)
assert up.unpack_int() == 10
assert up.unpack_int() == 1
assert up.unpack_int() == 3
up.done()
@wire_operation
def _op_attach(self):
dpb = bytes([1])
s = self.str_to_bytes(self.charset)
dpb += bytes([48, len(s)]) + s
s = self.str_to_bytes(self.user)
dpb += bytes([28, len(s)]) + s
s = self.str_to_bytes(self.password)
dpb += bytes([29, len(s)]) + s
p = xdrlib.Packer()
p.pack_int(self.op_attach)
p.pack_int(0) # Database Object ID
p.pack_string(self.str_to_bytes(self.filename))
p.pack_bytes(dpb)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_drop_database(self):
p = xdrlib.Packer()
p.pack_int(self.op_drop_database)
p.pack_int(self.db_handle)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_service_attach(self):
dpb = bytes([2,2])
s = self.str_to_bytes(self.user)
dpb += bytes([isc_spb_user_name, len(s)]) + s
s = self.str_to_bytes(self.password)
dpb += bytes([isc_spb_password, len(s)]) + s
dpb += bytes([isc_spb_dummy_packet_interval,0x04,0x78,0x0a,0x00,0x00])
p = xdrlib.Packer()
p.pack_int(self.op_service_attach)
p.pack_int(0)
p.pack_string(self.str_to_bytes('service_mgr'))
p.pack_bytes(dpb)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_service_info(self, param, item, buffer_length=512):
p = xdrlib.Packer()
p.pack_int(self.op_service_info)
# p.pack_int(self.svc_handle)
p.pack_int(self.db_handle)
p.pack_int(0)
p.pack_bytes(param)
p.pack_bytes(item)
p.pack_int(buffer_length)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_service_start(self, param):
p = xdrlib.Packer()
p.pack_int(self.op_service_start)
p.pack_int(self.db_handle)
p.pack_int(0)
p.pack_bytes(param)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_service_detach(self):
p = xdrlib.Packer()
p.pack_int(self.op_service_detach)
p.pack_int(self.db_handle)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_info_database(self, b):
p = xdrlib.Packer()
p.pack_int(self.op_info_database)
p.pack_int(self.db_handle)
p.pack_int(0)
p.pack_bytes(b)
p.pack_int(self.buffer_length)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_transaction(self, tpb):
p = xdrlib.Packer()
p.pack_int(self.op_transaction)
p.pack_int(self.db_handle)
p.pack_bytes(tpb)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_commit(self, trans_handle):
p = xdrlib.Packer()
p.pack_int(self.op_commit)
p.pack_int(trans_handle)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_commit_retaining(self, trans_handle):
p = xdrlib.Packer()
p.pack_int(self.op_commit_retaining)
p.pack_int(trans_handle)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_rollback(self, trans_handle):
p = xdrlib.Packer()
p.pack_int(self.op_rollback)
p.pack_int(trans_handle)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_rollback_retaining(self, trans_handle):
p = xdrlib.Packer()
p.pack_int(self.op_rollback_retaining)
p.pack_int(trans_handle)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_allocate_statement(self):
p = xdrlib.Packer()
p.pack_int(self.op_allocate_statement)
p.pack_int(self.db_handle)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_info_transaction(self, trans_handle, b):
p = xdrlib.Packer()
p.pack_int(self.op_info_transaction)
p.pack_int(trans_handle)
p.pack_int(0)
p.pack_bytes(b)
p.pack_int(self.buffer_length)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_info_database(self, b):
p = xdrlib.Packer()
p.pack_int(self.op_info_database)
p.pack_int(self.db_handle)
p.pack_int(0)
p.pack_bytes(b)
p.pack_int(self.buffer_length)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_free_statement(self, stmt_handle, mode):
p = xdrlib.Packer()
p.pack_int(self.op_free_statement)
p.pack_int(stmt_handle)
p.pack_int(mode)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_prepare_statement(self, stmt_handle, trans_handle, query, option_items=bytes([])):
desc_items = option_items + bytes([isc_info_sql_stmt_type])+INFO_SQL_SELECT_DESCRIBE_VARS
p = xdrlib.Packer()
p.pack_int(self.op_prepare_statement)
p.pack_int(trans_handle)
p.pack_int(stmt_handle)
p.pack_int(3) # dialect = 3
p.pack_string(self.str_to_bytes(query))
p.pack_bytes(desc_items)
p.pack_int(self.buffer_length)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_info_sql(self, stmt_handle, vars):
p = xdrlib.Packer()
p.pack_int(self.op_info_sql)
p.pack_int(stmt_handle)
p.pack_int(0)
p.pack_bytes(vars)
p.pack_int(self.buffer_length)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_execute(self, stmt_handle, trans_handle, params):
p = xdrlib.Packer()
p.pack_int(self.op_execute)
p.pack_int(stmt_handle)
p.pack_int(trans_handle)
if len(params) == 0:
p.pack_bytes(bytes([]))
p.pack_int(0)
p.pack_int(0)
send_channel(self.sock, p.get_buffer())
else:
(blr, values) = params_to_blr(params)
p.pack_bytes(blr)
p.pack_int(0)
p.pack_int(1)
send_channel(self.sock, p.get_buffer() + values)
@wire_operation
def _op_execute2(self, stmt_handle, trans_handle, params, output_blr):
p = xdrlib.Packer()
p.pack_int(self.op_execute2)
p.pack_int(stmt_handle)
p.pack_int(trans_handle)
if len(params) == 0:
p.pack_bytes(bytes([]))
p.pack_int(0)
p.pack_int(0)
send_channel(self.sock, p.get_buffer())
else:
(blr, values) = params_to_blr(params)
p.pack_bytes(blr)
p.pack_int(0)
p.pack_int(1)
send_channel(self.sock, p.get_buffer() + values)
p = xdrlib.Packer()
p.pack_bytes(output_blr)
p.pack_int(0)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_execute_immediate(self, trans_handle, db_handle, sql='', params=[],
in_msg='', out_msg='', possible_requests=0):
sql = self.str_to_bytes(sql)
in_msg = self.str_to_bytes(in_msg)
out_msg = self.str_to_bytes(out_msg)
r = bint_to_bytes(self.op_execute_immediate, 4)
r += bint_to_bytes(trans_handle, 4) + bint_to_bytes(db_handle, 4)
r += bint_to_bytes(len(sql), 2) + sql
r += bint_to_bytes(3, 2) # dialect
if len(params) == 0:
r += bint_to_bytes(0, 2) # in_blr len
values = bytes([])
else:
(blr, values) = params_to_blr(params)
r += bint_to_bytes(len(blr), 2) + blr
r += bint_to_bytes(len(in_msg), 2) + in_msg
r += bint_to_bytes(0, 2) # unknown short int 0
r += bint_to_bytes(len(out_msg), 2) + out_msg
r += bint_to_bytes(possible_requests, 4)
r += bytes([0]) * ((4-len(r+values)) & 3) # padding
send_channel(self.sock, r + values)
@wire_operation
def _op_fetch(self, stmt_handle, blr):
p = xdrlib.Packer()
p.pack_int(self.op_fetch)
p.pack_int(stmt_handle)
p.pack_bytes(blr)
p.pack_int(0)
p.pack_int(400)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_fetch_response(self, stmt_handle, xsqlda):
b = recv_channel(self.sock, 4)
while bytes_to_bint(b) == self.op_dummy:
b = recv_channel(self.sock, 4)
if bytes_to_bint(b) == self.op_response:
return self._parse_op_response() # error occured
if bytes_to_bint(b) != self.op_fetch_response:
raise InternalError
b = recv_channel(self.sock, 8)
status = bytes_to_bint(b[:4])
count = bytes_to_bint(b[4:8])
rows = []
while count:
r = [None] * len(xsqlda)
for i in range(len(xsqlda)):
x = xsqlda[i]
if x.io_length() < 0:
b = recv_channel(self.sock, 4)
ln = bytes_to_bint(b)
else:
ln = x.io_length()
raw_value = recv_channel(self.sock, ln, True)
if recv_channel(self.sock, 4) == bytes([0]) * 4: # Not NULL
r[i] = x.value(raw_value)
rows.append(r)
b = recv_channel(self.sock, 12)
op = bytes_to_bint(b[:4])
status = bytes_to_bint(b[4:8])
count = bytes_to_bint(b[8:])
return rows, status != 100
@wire_operation
def _op_detach(self):
p = xdrlib.Packer()
p.pack_int(self.op_detach)
p.pack_int(self.db_handle)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_open_blob(self, blob_id, trans_handle):
p = xdrlib.Packer()
p.pack_int(self.op_open_blob)
p.pack_int(trans_handle)
send_channel(self.sock, p.get_buffer() + blob_id)
@wire_operation
def _op_create_blob2(self, trans_handle):
p = xdrlib.Packer()
p.pack_int(self.op_create_blob2)
p.pack_int(0)
p.pack_int(trans_handle)
p.pack_int(0)
p.pack_int(0)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_get_segment(self, blob_handle):
p = xdrlib.Packer()
p.pack_int(self.op_get_segment)
p.pack_int(blob_handle)
p.pack_int(self.buffer_length)
p.pack_int(0)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_batch_segments(self, blob_handle, seg_data):
ln = len(seg_data)
p = xdrlib.Packer()
p.pack_int(self.op_batch_segments)
p.pack_int(blob_handle)
p.pack_int(ln + 2)
p.pack_int(ln + 2)
pad_length = ((4-(ln+2)) & 3)
send_channel(self.sock, p.get_buffer()
+ int_to_bytes(ln, 2) + seg_data + bytes([0])*pad_length)
@wire_operation
def _op_close_blob(self, blob_handle):
p = xdrlib.Packer()
p.pack_int(self.op_close_blob)
p.pack_int(blob_handle)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_que_events(self, names, ast, args, event_id):
params = bytes([1])
for name in names:
params += bytes([len(name)])
params += self.str_to_bytes(name)
params += int_to_bytes(0, 4)
p = xdrlib.Packer()
p.pack_int(self.op_que_events)
p.pack_int(self.db_handle)
p.pack_string(self.str_to_bytes(params))
p.pack_int(ast)
p.pack_int(args)
p.pack_int(event_id)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_cancel_events(self, event_id):
p = xdrlib.Packer()
p.pack_int(self.op_cancel_events)
p.pack_int(self.db_handle)
p.pack_int(event_id)
send_channel(self.sock, p.get_buffer())
@wire_operation
def _op_connect_request(self):
p = xdrlib.Packer()
p.pack_int(self.op_connect_request)
p.pack_int(1) # async
p.pack_int(self.db_handle)
p.pack_int(0)
send_channel(self.sock, p.get_buffer())
b = recv_channel(self.sock, 4)
while bytes_to_bint(b) == self.op_dummy:
b = recv_channel(self.sock, 4)
if bytes_to_bint(b) != self.op_response:
raise InternalError
h = bytes_to_bint(recv_channel(self.sock, 4))
recv_channel(self.sock, 8) # garbase
ln = bytes_to_bint(recv_channel(self.sock, 4))
ln += ln % 4 # padding
family = bytes_to_bint(recv_channel(self.sock, 2))
port = bytes_to_bint(recv_channel(self.sock, 2), u=True)
b = recv_channel(self.sock, 4)
ip_address = '.'.join([str(bytes_to_int(c)) for c in b])
ln -= 8
recv_channel(self.sock, ln)
(gds_codes, sql_code, message) = self._parse_status_vector()
if sql_code or message:
raise OperationalError(message, gds_codes, sql_code)
return (h, port, family, ip_address)
@wire_operation
def _op_response(self):
b = recv_channel(self.sock, 4)
while bytes_to_bint(b) == self.op_dummy:
b = recv_channel(self.sock, 4)
if bytes_to_bint(b) != self.op_response:
raise InternalError
return self._parse_op_response()
@wire_operation
def _op_event(self):
b = recv_channel(self.sock, 4)
while bytes_to_bint(b) == self.op_dummy:
b = recv_channel(self.sock, 4)
if bytes_to_bint(b) == self.op_response:
return self._parse_op_response()
if bytes_to_bint(b) == self.op_exit or bytes_to_bint(b) == self.op_exit:
raise DisconnectByPeer
if bytes_to_bint(b) != self.op_event:
raise InternalError
return self._parse_op_event()
@wire_operation
def _op_sql_response(self, xsqlda):
b = recv_channel(self.sock, 4)
while bytes_to_bint(b) == self.op_dummy:
b = recv_channel(self.sock, 4)
if bytes_to_bint(b) != self.op_sql_response:
raise InternalError
b = recv_channel(self.sock, 4)
count = bytes_to_bint(b[:4])
r = []
for i in range(len(xsqlda)):
x = xsqlda[i]
if x.io_length() < 0:
b = recv_channel(self.sock, 4)
ln = bytes_to_bint(b)
else:
ln = x.io_length()
raw_value = recv_channel(self.sock, ln, True)
if recv_channel(self.sock, 4) == bytes([0]) * 4: # Not NULL
r.append(x.value(raw_value))
else:
r.append(None)
b = recv_channel(self.sock, 32) # ??? why 32 bytes skip
return r
def _wait_for_event(self, sock):
event_id = 0
while True:
op = bytes_to_int(recv_channel(sock, 4))
if op == self.op_dummy:
pass
elif op == self.op_exit or op == self.op_disconnect:
break
elif op == self.op_event:
db_handle = bytes_to_int(recv_channel(sock, 4))
ln = bytes_to_int(recv_channel(sock, 4))
b = recv_channel(sock, ln)
event_id = bytes_to_int(recv_channel(sock, 4))
break
return (event_id, )