ip(6P)                          TCP/IP R4.11                          ip(6P)


NAME
       IP - Communications Protocol Internet Protocol

INCLUDE FILES
           #include <sys/socket.h>
           #include <netinet/ip.h>

SYNOPSIS
       This is an example of how you would create an endpoint for the IP
       connection.
           s = socket(AFINET, SOCKRAW, 0);

DESCRIPTION
       IP is the network/internetwork layer protocol used by the Internet
       protocol family.  It may be accessed through a "raw socket" when
       developing special-purpose applications.  A raw socket can be opened
       only by a user with appropriate privilege.  On a generic DG/UX
       system, appropriate privilege is granted by having an effective UID
       of 0 (root).  See the appropriateprivilege(5) man page for more
       information.

       On a system with DG/UX information security, appropriate privilege is
       granted by having one or more specific capabilities enabled in the
       effective capability set of the user.  See the capdefaults(5) man
       page for the default capabilities for this command.

       IP sockets are connectionless, and are normally used with the sendto
       and recvfrom calls, though the connect(2) call may also be used to
       fix the destination for future packets (in which case the read(2) or
       recv(2) and write(2) or send(2) system calls may be used).

       Outgoing packets must have an IP header prepended to them.

OPTIONS
       IPPROTO_IP level options recognized by IP:

       IP_TX_OPTIONS       IP transmit options.  When setting, the system
                           will verify that the option string is well
                           formed.

       IP_RX_OPTIONS       IP receive options.  When setting, the system
                           will verify that the option string is well
                           formed.

       IP_TOS              IP Type Of Service.

       IP_TTL              IP Time To Live.  Number of routing hops a packet
                           may make before reaching its destination.

       IP_DONTFRAG         IP Dont Fragment flag.  When non-zero, IP will
                           try to send a packet without fragmenting.  If a
                           packet is too large to send without fragmenting,
                           the packet is dropped.

       IP_HDRINCL          IP include header.  When non-zero, IP will
                           include the IP header with the data.

       IP_RECVOPTS         IP include options.  When non-zero, IP will
                           include all IP options with the received
                           datagram.

       IP_RECVRETOPTS      IP include response options.  When non-zero, IP
                           will the IP options for the response (currently
                           not supported by DG/UX).

       IP_RECVDSTADDR      IP receive destination address.  When non-zero,
                           IP will include the IP destination address with
                           the received datagram.

       IP_RECVIFADDR       IP receive interface address.  When non-zero, IP
                           will include the IP address of the receiving
                           interface with the received datagram.

       IP_MULTICAST_IF     IP Multicast Default Interface.  Specifies the
                           default interface for outbound IP multicast
                           datagrams.

       IP_MULTICAST_TTL    IP Multicast Time-to-Live.  Specifies the default
                           IP Time-to-Live for outbound IP multicast
                           datagrams.

       IP_MULTICAST_LOOP   IP Multicast Loopback.  When non-zero, IP will
                           receive a copy of outbound IP multicast
                           datagrams.

       IP_ADD_MEMBERSHIP   IP Multicast add membership.  Allows IP to add an
                           interface to a valid multicast group's
                           membership.

       IP_DROP_MEMBERSHIP  IP Multicast drop membership.  Allows IP to drop
                           an interface from a valid multicast group's
                           membership.

SEE ALSO
       connect(2), recv(2), send(2), intro(6), inet(6F), tcp(6P),
       appropriateprivilege(5).
       Programming with TCP/IP on the DG/UX System.


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