DIGITAL TCP/IP Services for OpenVMS
System Services and C Socket Programming

• KERNEL mode
  • calling socket routines from

• Linger
  • option #1
  • option #2
  • option #3
  • option #4
• linger structure
• LINK command
• Linking programs
  • compiled by DEC C
  • compiled by VAX C
• Listen
  • C Socket example
  • for connection requests
• listen() socket routine
• Local host address parameter
  • binding a socket
• Local socket
  • creating
• Lookup
  • BIND

• Macro
  • UCBDEF
• Message length
  • IOSB
• Messages
  • broadcast #1
  • broadcast #2
  • broadcast #3
  • discarding #1
  • discarding #2
  • non-routed
  • out-of-band
  • received
• msghdr structure
  • members
• Multiple buffers

• NBIO flags
  • See specific socket routine
• netent structure
  • members
• netent structure definition
• NETMBX privileges
• ntohl()
  • description
• ntohs()
  • description

• Online program examples
  • location of
  • TCP/IP server accepting a connection from the auxiliary server
  • TCP/IP server using QIO calls
  • TCP/IP server using the C Socket interface
  • UDP/IP server using C Socket interface
• OOB
  • character
  • data flags
    • See specific socket routine
  • See Out-of-band character
  • sending to a target process
• OOBINLINE socket option
• Open a connection
  • See IO$_ACCESS
• OpenVMS
  • programming interfaces
• OpenVMS System Services
  • close and delete a socket
  • connection accept
  • connection request example
  • reference
  • shutting down a socket
  • using
• Out-of-band character
  • request
• Out-of-band data
  • examples #1
  • examples #2
  • in a READ operation
  • in a WRITE operation
  • using the IO$M_INTERRUPT function

• p6 argument
• Parameters
  • p6 descriptor fields
  • passing
  • SIOCATMARK command
  • specifying input
  • specifying output
  • types
• Passive socket
• Peek feature
• PEEK flags
  • See specific socket routine
• Peeking at queued messages
  • during a READ operation
• Polling sockets
• Port numbers
  • reuse
  • specifying a local port
• Portability concerns
  • socket routines #1
  • socket routines #2
• Privilege and protection restrictions
  • applying
• Privileges
  • disabling #1
  • disabling #2
  • IO$_SETCHAR
  • IO$_SETMODE #1
  • IO$_SETMODE #2
  • NETMBX
• Programming interfaces
  • C Socket
  • OpenVMS system services
• Protection restrictions
  • applying
• Protocols
  • connection-oriented
  • connectionless
  • internet
• Pseudodevice
  • new
  • read characteristics
  • setting characteristics
• PURGE flags
  • See specific socket routine

• $QIO
  • arguments #1
  • arguments #2
  • arguments #3
  • arguments #4
  • arguments #5
  • assigning channels
  • AST routine
  • astadr
  • astprm
  • BIND lookup
  • broadcast messages
  • call format
  • chan
  • close and delete function
  • common function
  • condition values #1
  • condition values #2
  • condition values #3
  • creating a socket
  • description #1
  • description #2
  • device- and function-independent arguments
  • device-dependent arguments
  • efn
  • error codes
  • event flag
  • func
  • function-dependent arguments #1
  • function-dependent arguments #2
  • function-dependent arguments #3
  • function-dependent parameters
  • function-independent parameters
  • I/O status block
  • initiate a connection
  • IO$_ACCESS function
  • IO$_ACPCONTROL function
  • IO$_DEACCESS function
  • IO$_READVBLK function #1
  • IO$_READVBLK function #2
  • IO$_READVBLK function #3
  • IO$_SENSEMODE function #1
  • IO$_SENSEMODE function #2
  • IO$_SETCHAR function #1
  • IO$_SETCHAR function #2
  • IO$_SETMODE function #1
  • IO$_SETMODE function #2
  • IO$_SETMODE function #3
  • IO$_WRITEVBLK function #1
  • IO$_WRITEVBLK function #2
  • IO$_WRITEVBLK function #3
  • IO$_WRITEVBLK function #4
  • iosb #1
  • iosb #2
  • polling sockets
  • reading OOB data
  • receiving OOB data
  • system service call parameters
  • system service calls
  • test I/O status block
  • using $QIO or $QIOW
  • using READ operations with a stream
  • when to use $QIO
  • when to use $QIOW
• $QIOW
  • arguments
  • description
  • See also $QIO
• Queue I/O Request and Wait service
• Queue I/O Request service
• Queue request
  • asynchronous
  • synchronous
• Queued messages
  • peeking during a READ operation
• Queues
  • flush data from
• Quotas
  • AST limit
  • BIOLM
  • receive socket

• Raw sockets
  • socket type
• Read a virtual block
  • See IO$_READVBLK
• Read an out-of-band message
• Read functions
• Read operation
  • out-of-band
    • C Socket routine
    • $QIO function
  • peeking
    • at queued messages
    • with C Socket routine
    • with $QIO system service
  • specifying out-of-band read data
  • with C Socket routine
  • with $QIO system service
• read() socket routine
• recv() routine
  • peek feature
• recv() socket routine
  • flags
    • OOB data
• recvfrom() socket routine
  • flags
• recvmsg() socket routine
  • flags
• Release an I/O channel
• Remote socket
  • specifying a socket name
• Resolver
  • See BIND resolver
• Restrictions
  • applying
    • privilege
    • protection
• Run-time library examples
  • C Socket

• select() socket routine
  • flags
• send() socket routine
• send() socket routine
• Sending a connection request
  • using C Socket interface
  • using $QIO system service
• sendmsg() socket routine
• sendto() socket routine
• SET CHARACTERISTICS function
• SET COMMUNICATION/BROADCAST command
• SET MODE function
• SET PROTOCOL UDP command
  • /BROADCAST qualifier
  • to disable privilege checking
• setsockopt()
  • description
• SHOW DEVICE_SOCKET command #1
• SHOW DEVICE_SOCKET command #2
• Shut down connection
  • See IO$M_SHUTDOWN
• Shutdown
  • arguments
• Shutdown flags
  • IO$_DEACCESS #1
  • IO$_DEACCESS #2
• shutdown() socket routine
• shutdown() socket routine
• SIOCATMARK command #1
• SIOCATMARK command #2
• $SIOCDEF macro
• sockaddr structure
  • members
• sockaddr_in structure #1
• sockaddr_in structure #2
  • members
• Socket name
  • IO$_ACCESS
  • specifying
• Socket options
  • IO$SETMODE
  • IO$_SETCHAR
  • IO$_SETMODE
  • OOBINLINE
  • share
  • specifying
  • TCP
  • TCP/IP
• socket() routine #1
• socket() routine #2
• socket() routine
  • example
• Socket routines
  • gethostbyaddr()
  • gethostbyname()
  • gethostname()
  • introduction
    • writing
  • porting considerations
  • recv() flags
  • select()
  • send()
• Socket types
  • datagram #1
  • datagram #2
  • IO$_SETCHAR #1
  • IO$_SETCHAR #2
  • IO$_SETMODE #1
  • IO$_SETMODE #2
  • raw #1
  • raw #2
  • stream #1
  • stream #2
• Sockets
  • active
  • binding
    • with C Socket routine
    • with $QIO system service
  • calling from EXEC mode
  • cancel requests
  • closing and deleting
    • with C Socket routine
  • connection request example
  • creating
  • deleting
    • with $QIO system service
  • error codes translated to $QIO equivalents
  • event flags #1
  • event flags #2
  • IO$M_WRTATTN
  • IO$_WRITEVBLK
  • listening
    • with C Socket routine
    • with $QIO system service
  • local address
  • naming
  • object library
  • obtaining information
    • with C Socket routines
    • with $QIO system service
  • options
    • UCX$FULL_DUPLEX_CLOSE #1
    • UCX$FULL_DUPLEX_CLOSE #2
  • passive
  • peek feature
  • polling #1
  • polling #2
  • read operation
  • reading OOB data
  • receiving OOB data
  • recv() routine example
  • reuse address
  • routines
    • calling from AST state
    • calling from KERNEL mode
    • porting considerations
  • run-time library
  • shut down
    • with C Socket routine
    • with $QIO system service
  • shutting down
  • standard I/O
    • compilation warnings
  • TCP/IP parameter types
  • UDP
• SS$_ABORT
• Standard I/O
  • use of
    • with fdopen function
• Status
  • block fields
  • device unit
  • test I/O status block
  • UNIX completion fields
  • word length
• Stream sockets
  • socket type
• Structures
  • hostent #1
  • hostent #2
  • in_addr
  • iovec
  • linger
  • msghdr
  • netent #1
  • netent #2
    • members
  • sockaddr
  • sockaddr_in #1
  • sockaddr_in #2
  • timeval
  • use with socket routines
• Symbol definition files
  • names
  • $NETENTDEF
  • UCX$INETDEF #1
  • UCX$INETDEF #2
• $SYNCH
  • event flags
• $SYNCH service
  • arguments
• Synchronize $QIO completion
• Synchronize service completion
• Synchronous queue request
• Synchronous service completion
• SYS$LIBRARY
• SYS$QIO
  • call syntax
• System service calls
  • See $QIO system services