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.TH in.h 3HEAD "30 Aug 2002" "SunOS 5.11" "Headers"
.SH NAME
in.h, in \- Internet Protocol family
.SH SYNOPSIS
.LP
.nf
#include <netinet/in.h>
.fi
.SH DESCRIPTION
.sp
.LP
The <\fBnetinet/in.h\fR> header defines the following types through \fBtypedef\fR:
.sp
.ne 2
.mk
.na
\fB\fBin_port_t\fR\fR
.ad
.RS 13n
.rt
An unsigned integral type of exactly 16 bits.
.RE
.sp
.ne 2
.mk
.na
\fB\fBin_addr_t\fR\fR
.ad
.RS 13n
.rt
An unsigned integral type of exactly 32 bits. The <\fBnetinet/in.h\fR> header defines the \fBin_addr\fR structure that includes the following member:
.RE
.sp
.LP
The <\fBnetinet/in.h\fR> header defines the \fBin_addr\fR structure that includes the following member:
.sp
.in +2
.nf
in_addr_t s_addr
.fi
.in -2
.sp
.LP
The <\fBnetinet/in.h\fR> header defines the type \fBsa_family_t\fR as described in \fBsocket.h\fR(3HEAD).
.sp
.LP
The <\fBnetinet/in.h\fR> header defines the following macros for use as values of the \fIlevel\fR argument of \fBgetsockopt()\fR and \fBsetsockopt()\fR:
.sp
.ne 2
.mk
.na
\fB\fBIPPROTO_IP\fR \fR
.ad
.RS 21n
.rt
Dummy for \fBIP\fR
.RE
.sp
.ne 2
.mk
.na
\fB\fBIPPROTO_ICMP\fR \fR
.ad
.RS 21n
.rt
Control message protocol
.RE
.sp
.ne 2
.mk
.na
\fB\fBIPPROTO_TCP\fR \fR
.ad
.RS 21n
.rt
\fBTCP\fR
.RE
.sp
.ne 2
.mk
.na
\fB\fBIPPROTO_UDP\fR \fR
.ad
.RS 21n
.rt
User datagram protocol The <\fBnetinet/in.h\fR> header defines the following macros for use as destination addresses for \fBconnect()\fR, \fBsendmsg()\fR, and \fBsendto()\fR:
.RE
.sp
.ne 2
.mk
.na
\fB\fBINADDR_ANY\fR \fR
.ad
.RS 21n
.rt
Local host address
.RE
.sp
.ne 2
.mk
.na
\fB\fBINADDR_BROADCAST\fR \fR
.ad
.RS 21n
.rt
Broadcast address
.RE
.sp
.LP
The <\fBnetinet/in.h\fR> header defines the \fBsockaddr_in\fR structure that is used to store addresses for the Internet protocol family. Values of this type must be cast to \fBstruct sockaddr\fR for use with the socket interfaces.
.SS "Default"
.sp
.LP
For applications that do not require standard-conforming behavior (those that use the socket interfaces described in section (3SOCKET) of the reference manual; see \fBIntro\fR(3) and \fBstandards\fR(5)), the <\fBnetinet/in.h\fR> header defines the \fBsockaddr_in\fR structure that includes the following members:
.sp
.in +2
.nf
sa_family_t sin_family
in_port_t sin_port
struct in_addr sin_addr
char sin_zero[8]
.fi
.in -2
.SS "Standard conforming"
.sp
.LP
For applications that require standard-conforming behavior (those that use the socket interfaces described in section (3XNET) of the reference manual; see \fBIntro\fR(3) and \fBstandards\fR(5)), the <\fBnetinet/in.h\fR> header defines the \fBsockaddr_in\fR structure that includes the following members:
.sp
.in +2
.nf
sa_family_t sin_family
in_port_t sin_port
struct in_addr sin_addr
unsigned char sin_zero[8]
.fi
.in -2
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp
.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i)
lw(2.75i) |lw(2.75i)
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
Interface StabilityCommitted
_
StandardSee \fBstandards\fR(5).
.TE
.SH SEE ALSO
.sp
.LP
\fBIntro\fR(3), \fBconnect\fR(3SOCKET), \fBconnect\fR(3XNET), \fBgetsockopt\fR(3SOCKET), \fBgetsockopt\fR(3XNET), \fBsendmsg\fR(3SOCKET), \fBsendmsg\fR(3XNET), \fBsendto\fR(3SOCKET), \fBsendto\fR(3XNET), \fBsetsockopt\fR(3SOCKET), \fBsetsockopt\fR(3XNET), \fBsocket.h\fR(3HEAD), \fBattributes\fR(5), \fBstandards\fR(5)