Network
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Setup
The work on the network is carried out in RK7 by the NetKern.DLL library. The library uses errors32.dll, dllman.dll, thread32.dll, borlndmm.dll and one or more protocol libraries: tcpsoc.dll(WIN), nbhdup.dll, spxsoc.dll, localnet.dll.
A typical network problem is that dynamic name resolution doesn't work. In this case, the name and address match should be clearly defined (for TCP/IP in the [TCPDNS] section])
Description of
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INI File's Sections
Section [NETKERN]
The main network settings are located in the [NETKERN] section of the initialization INI file (the default values specified defined in parentheses):
CANCELONDISCONNECT = 1-When 0 waits for a reconnect on the client and tries to reach the client from the server — If 0, the server tries to reconnect to the client in case of a disconnect after receiving (sending) an RPC request .
CRYPT = 1- — encryption when sending
FILEMANAGERPATH = u: - Base path for file handling — A basic path of file functions (always appended added to the file name). The * path * - all disks are is processed separately.
IGNOREERRORSFROMSERVER = 1 - If — If set to 0, the stack of error codes passed from the server in case of an execution error on the server will be saved in the error file.
LOADALLPROTOCOLS = 1-When — If 0, exits RPCInitEx at the first loaded protocol, the rest are loaded asynchronously during operationthe working process. At If 1, it does not exit until it loads all the protocols.
MAXSENDRETRYS (2 -— CANCELONDISCONNECT) - Number — A number of attempts to send a a data block of data
MAXBLOCKSIZE = 20000000 – Maximum package packet size (for example, that of the RPC procedure returned data of an RPC procedure). It must be the same on both the client and the server.
MINPACKSIZE = 15000 – minimum block Minimum packet size for packaging. In the case of SLOWCONNECT=1 in the protocol settings on of one side, a value of 10 times less is used.
MINPACKDELTA = 1000 – minimum – Minimum size of reduction during packagingdata packing. In the case of SLOWCONNECT=1 in the protocol settings on of one side, a value of 10 times less is used.
PROTOCOLS = PROTOCOL\*. DLL- — Masks for searching for driver DLL files via ";". If you need to access yourself(for example, a server at the checkout), you must use the protocol the server and the cash register are installed on one and the same device, use localnet.dll.
RETRYRECEIVE = not CANCELONDISCONNECT- — Wait for the reconnect to the client to continue receiving the data packet.
ROUTERCOUNT = 2 – The number of routing tasks.
TESTMESSAGES = 0- — If 1, outputs a log with network operations log in the debug log file
to the debug file ALLSENDLOG = "" – If the value is not empty, then this should be the directory (with the final "\") where the files with the sent data will be stored.
TIMEOUT = (30000/180000) - ms. - handshake — ms. — handshake wait timeout and wait timeout of connection send queue wait timeout (there are different tasks in the queue that use the same connection). If SLOWCONNECT=1 is set in the protocol settings, the queue timeout will be at least 180000, even if a lower value is set.
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— Configuring TCP Driver for Windows
The driver reads the [TCPSOC] section of the record from the ini INI file (default values defined in parentheses):
ASYNCHCONNECT = 1 - try — try to connect asynchronously
CHECKSELFNAME = 0 - try — try to find a proper self name during initialization (to avoid duplication).
KEEPALIVE = 1-send requests — send keepalive requests
LISTEN = 1 - Wait — Wait for connections from others
MAXBUFFER = 65280 - — the maximum size of data sent by a single command
SLOWCONNECT = 0 – when set to – if 1, changes the default values for MAXBUFFER (4096), TIMEOUT (20000). In addition, the pfSlowConnect driver type flag is set, which uses other timeouts inside NetKern.
DNSFILE = tcpdns.txt – DNS name decryption file name.
Format of the entry шы record in the name decryption file:
Name Name address [:port]
Address – — a dot-separated Internet address or a computer name on in the local network or DNS name
The port is Port — either decimal or hexadecimal (preceded by a $signthe $ sign). By default, port = PORT.
For example, for the names the AA and CCCC names:
AA 198.154.196.105:5150
CC COMPUTER1:5155
DNSSECTION (TCPDNS) - a — a section in the same file that contains name decryptions.
Format of the entry record in the name decryption section:
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[TCPDNS]
AA=198.154.196.105:5150
CC=198.154.196.105:5155
PORT = 5150 – – the port number for incoming connections. If port=5150 and there is an error that the port is busy, the number will increase by 1, etc.
PRIORITY = 50 – – the driver priority of the driver compared to the others (the smaller numbers are viewed first)
TIMEOUT = 4000 – – timeout for the operation of send/receive blocks MAXBUFFER MAXBUFFER blocks sending/receiving or connect with ASYNCHCONNECT=1
USEINTERNETDNS =0 – – if 1, the driver will try to find the DNS name on the Internet, with 1 ignored SENDTO255IPSENDTO255IP is ignored
RECEIVELOG = "name" – the file name of the file for received data logging revenues
SENDLOG = "name" – – the name of the file to log shipmentsfile name for sent data logging
UDP_BROADCAST_PORT = 5160 – – the port number to for messages exchange messages (including broadcast) to determine the address by name, must be the same across the entire network
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| To disable broadcast messages from any server, set UDP_BROADCAST_PORT = 0 |
SERVERNODELAY = 0 - with a value of 1 for incoming connections— if 1, disables the Nagle algorithm for incoming connections, which leads to faster response, but may lead to a narrowing of the channel narrowing.
CLIENTNODELAY = 0 - the — the same as SERVERNODELAY, but for outgoing connections
WAITBEFORECLOSE = 0 - at — if 1, it will wait for the completion of network operations when the connection is programmatically terminatedwaits for the network operations completion in case of program disconnection.
SENDTO255IP = 0 - at 1 if it is impossible to find out the address — if 1, in case the address cannot be found by name, it tries to reach all 254 addresses of the subnet (USEINTERNETDNS must be 0)
Section
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TCPDNS
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See TCPSOC
Section [NB]
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— NetBIOS Driver Settings (nb.dll, nbhdup.dll)
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The driver reads reads the [NB] section from the ini INI file, writes records (default values defined in parentheses, default values):
TIMEOUT=15000- — timeout of network operations in milliseconds
Listen=1 - whether to "listen" - wait — whether to «listen» — wait for connection. Only for nb.dll
Recommendations
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When Using Slow Communication Channel
If a low-speed communication channel is used, then the following parameters should be configured: ShortTimeout, LongTimeout both both for the directory reference server (REFSERVER - is the main section) and for the manager stations (REFEDIT is the main section).
CollFileCache for for the manager station, for storing directories references in files and synchronizing only changed collections (REFEDIT is the main section).