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Annotation of cci/usr/src/man/man4/ip.4p, revision 1.1.1.1

1.1       root        1: .TH IP 4P "25 March 1982"
                      2: .UC 4
                      3: .SH NAME
                      4: ip \- Internet Protocol
                      5: .SH SYNOPSIS
                      6: .B #include <sys/socket.h>
                      7: .br
                      8: .B #include <netinet/in.h>
                      9: .PP
                     10: .B s = socket(AF_INET, SOCK_RAW, 0);
                     11: .SH DESCRIPTION
                     12: IP is the transport layer protocol used
                     13: by the Internet protocol family.  It may be accessed
                     14: through a \*(lqraw socket\*(rq when developing new protocols, or
                     15: special purpose applications.  IP sockets are connectionless,
                     16: and are normally used with the
                     17: .I sendto 
                     18: and
                     19: .I recvfrom 
                     20: calls, though the
                     21: .IR connect (2)
                     22: call may also be used to fix the destination for future
                     23: packets (in which case the 
                     24: .IR read (2)
                     25: or
                     26: .IR recv (2)
                     27: and 
                     28: .IR write (2)
                     29: or
                     30: .IR send (2)
                     31: system calls may be used).
                     32: .PP
                     33: Outgoing packets automatically have an IP header prepended to
                     34: them (based on the destination address and the protocol
                     35: number the socket is created with).
                     36: Likewise, incoming packets have their IP header stripped
                     37: before being sent to the user.
                     38: .SH DIAGNOSTICS
                     39: A socket operation may fail with one of the following errors returned:
                     40: .TP 15
                     41: [EISCONN]
                     42: when trying to establish a connection on a socket which
                     43: already has one, or when trying to send a datagram with the destination
                     44: address specified and the socket is already connected;
                     45: .TP 15
                     46: [ENOTCONN]
                     47: when trying to send a datagram, but
                     48: no destination address is specified, and the socket hasn't been
                     49: connected;
                     50: .TP 15
                     51: [ENOBUFS]
                     52: when the system runs out of memory for
                     53: an internal data structure;
                     54: .TP 15
                     55: [EADDRNOTAVAIL]
                     56: when an attempt is made to create a 
                     57: socket with a network address for which no network interface
                     58: exists.
                     59: .SH SEE ALSO
                     60: send(2), recv(2), intro(4N), inet(4F)
                     61: .SH BUGS
                     62: One should be able to send and receive ip options.
                     63: .PP
                     64: The protocol should be settable after socket creation.

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