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<!-- Copyright (C) 2003 Red Hat, Inc. --><!-- This material may be distributed only subject to the terms --><!-- and conditions set forth in the Open Publication License, v1.0 --><!-- or later (the latest version is presently available at --><!-- http://www.opencontent.org/openpub/). --><!-- Distribution of the work or derivative of the work in any --><!-- standard (paper) book form is prohibited unless prior --><!-- permission is obtained from the copyright holder. --><HTML><HEAD><TITLE>net_addrcmp</TITLE><meta name="MSSmartTagsPreventParsing" content="TRUE"><METANAME="GENERATOR"CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+"><LINKREL="HOME"TITLE="eCos Reference Manual"HREF="ecos-ref.html"><LINKREL="UP"TITLE="TCP/IP Library Reference"HREF="tcpip-library-reference.html"><LINKREL="PREVIOUS"TITLE="link_addr"HREF="net-common-tcpip-manpages-link-addr.html"><LINKREL="NEXT"TITLE="ns"HREF="net-common-tcpip-manpages-ns.html"></HEAD><BODYCLASS="SECT1"BGCOLOR="#FFFFFF"TEXT="#000000"LINK="#0000FF"VLINK="#840084"ALINK="#0000FF"><DIVCLASS="NAVHEADER"><TABLESUMMARY="Header navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><THCOLSPAN="3"ALIGN="center">eCos Reference Manual</TH></TR><TR><TDWIDTH="10%"ALIGN="left"VALIGN="bottom"><AHREF="net-common-tcpip-manpages-link-addr.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom">Chapter 38. TCP/IP Library Reference</TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="net-common-tcpip-manpages-ns.html"ACCESSKEY="N">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><DIVCLASS="SECT1"><H1CLASS="SECT1"><ANAME="NET-COMMON-TCPIP-MANPAGES-NET-ADDRCMP">net_addrcmp</H1><TABLEBORDER="5"BGCOLOR="#E0E0F0"WIDTH="70%"><TR><TD><PRECLASS="SCREEN">NET_ADDRCMP(3) System Library Functions Manual NET_ADDRCMP(3)NAME net_addrcmp - compare socket address structuresSYNOPSIS #include <netdb.h> int net_addrcmp(struct sockaddr *sa1, struct sockaddr *sa2);DESCRIPTION The net_addrcmp() function compares two socket address structures, sa1 and sa2.RETURN VALUES If sa1 and sa2 are for the same address, net_addrcmp() returns 0. The sa_len fields are compared first. If they do not match, net_addrcmp() returns -1 or 1 if sa1->sa_len is less than or greater than sa2->sa_len, respectively. Next, the sa_family members are compared. If they do not match, net_addrcmp() returns -1 or 1 if sa1->sa_family is less than or greater than sa2->sa_family, respectively. Lastly, if each socket address structure's sa_len and sa_family fields match, the protocol-specific data (the sa_data field) is compared. If there's a match, both sa1 and sa2 must refer to the same address, and 0 is returned; otherwise, a value >0 or <0 is returned.HISTORY A net_addrcmp() function was added in OpenBSD 2.5.BSD July 3, 1999 BSD </PRE></TD></TR></TABLE></DIV><DIVCLASS="NAVFOOTER"><HRALIGN="LEFT"WIDTH="100%"><TABLESUMMARY="Footer navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top"><AHREF="net-common-tcpip-manpages-link-addr.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="ecos-ref.html"ACCESSKEY="H">Home</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top"><AHREF="net-common-tcpip-manpages-ns.html"ACCESSKEY="N">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">link_addr</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="tcpip-library-reference.html"ACCESSKEY="U">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">ns</TD></TR></TABLE></DIV></BODY></HTML>⌨️ 快捷键说明
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