ip(6P)                          TCP/IP 5.4.2                          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 the superuser.

       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.

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








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