摘要：
NAMEarpa/inet.h互联网操作的定义SYNOPSIS#包括 描述端口和地址的定义见。地址结构应在图纸中定义
NAME
arpa/inet.h - definitions for internet operations
SYNOPSIS
#include <arpa/inet.h>
DESCRIPTION
The in_port_t and in_addr_t types shall be defined as described in
<netinet/in.h> .
The in_addr structure shall be defined as described in <netinet/in.h> .
The INET_ADDRSTRLEN and INET6_ADDRSTRLEN macros shall be defined as
described in <netinet/in.h> .
The following shall either be declared as functions, defined as macros,
or both. If functions are declared, function prototypes shall be
provided.
uint32_t htonl(uint32_t);
uint16_t htons(uint16_t);
uint32_t ntohl(uint32_t);
uint16_t ntohs(uint16_t);
The uint32_t and uint16_t types shall be defined as described in
<inttypes.h> .
The following shall be declared as functions and may also be defined as
macros. Function prototypes shall be provided.
in_addr_t inet_addr(const char *);
char *inet_ntoa(struct in_addr);
const char *inet_ntop(int, const void *restrict, char *restrict,
socklen_t);
int inet_pton(int, const char *restrict, void *restrict);
Inclusion of the <arpa/inet.h> header may also make visible all symbols
from <netinet/in.h> and <inttypes.h>.
The following sections are informative.
APPLICATIONUSAGE
None.
RATIONALE
None.
FUTUREDIRECTIONS
None.
SEEALSO
<netinet/in.h> , <inttypes.h> , the System Interfaces volume of IEEE Std 1003.1-2001, htonl(), inet_addr()
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online
at http://www.opengroup.org/unix/online.html .