doc/html/ref/net-common-tcpip-manpages-net-addrcmp.html

   1 <!-- Copyright (C) 2003 Red Hat, Inc.                                -->
   2 <!-- This material may be distributed only subject to the terms      -->
   3 <!-- and conditions set forth in the Open Publication License, v1.0  -->
   4 <!-- or later (the latest version is presently available at          -->
   5 <!-- http://www.opencontent.org/openpub/).                           -->
   6 <!-- Distribution of the work or derivative of the work in any       -->
   7 <!-- standard (paper) book form is prohibited unless prior           -->
   8 <!-- permission is obtained from the copyright holder.               -->
   9 <HTML
  10 ><HEAD
  11 ><TITLE
  12 >net_addrcmp</TITLE
  13 ><meta name="MSSmartTagsPreventParsing" content="TRUE">
  14 <META
  15 NAME="GENERATOR"
  16 CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
  17 "><LINK
  18 REL="HOME"
  19 TITLE="eCos Reference Manual"
  20 HREF="ecos-ref.html"><LINK
  21 REL="UP"
  22 TITLE="TCP/IP Library Reference"
  23 HREF="tcpip-library-reference.html"><LINK
  24 REL="PREVIOUS"
  25 TITLE="link_addr"
  26 HREF="net-common-tcpip-manpages-link-addr.html"><LINK
  27 REL="NEXT"
  28 TITLE="ns"
  29 HREF="net-common-tcpip-manpages-ns.html"></HEAD
  30 ><BODY
  31 CLASS="SECT1"
  32 BGCOLOR="#FFFFFF"
  33 TEXT="#000000"
  34 LINK="#0000FF"
  35 VLINK="#840084"
  36 ALINK="#0000FF"
  37 ><DIV
  38 CLASS="NAVHEADER"
  39 ><TABLE
  40 SUMMARY="Header navigation table"
  41 WIDTH="100%"
  42 BORDER="0"
  43 CELLPADDING="0"
  44 CELLSPACING="0"
  45 ><TR
  46 ><TH
  47 COLSPAN="3"
  48 ALIGN="center"
  49 >eCos Reference Manual</TH
  50 ></TR
  51 ><TR
  52 ><TD
  53 WIDTH="10%"
  54 ALIGN="left"
  55 VALIGN="bottom"
  56 ><A
  57 HREF="net-common-tcpip-manpages-link-addr.html"
  58 ACCESSKEY="P"
  59 >Prev</A
  60 ></TD
  61 ><TD
  62 WIDTH="80%"
  63 ALIGN="center"
  64 VALIGN="bottom"
  65 >Chapter 38. TCP/IP Library Reference</TD
  66 ><TD
  67 WIDTH="10%"
  68 ALIGN="right"
  69 VALIGN="bottom"
  70 ><A
  71 HREF="net-common-tcpip-manpages-ns.html"
  72 ACCESSKEY="N"
  73 >Next</A
  74 ></TD
  75 ></TR
  76 ></TABLE
  77 ><HR
  78 ALIGN="LEFT"
  79 WIDTH="100%"></DIV
  80 ><DIV
  81 CLASS="SECT1"
  82 ><H1
  83 CLASS="SECT1"
  84 ><A
  85 NAME="NET-COMMON-TCPIP-MANPAGES-NET-ADDRCMP">net_addrcmp</H1
  86 ><TABLE
  87 BORDER="5"
  88 BGCOLOR="#E0E0F0"
  89 WIDTH="70%"
  90 ><TR
  91 ><TD
  92 ><PRE
  93 CLASS="SCREEN"
  94 >NET_ADDRCMP(3)          System Library Functions Manual         NET_ADDRCMP(3)
  95
  96 NAME
  97      net_addrcmp - compare socket address structures
  98
  99 SYNOPSIS
 100      #include &lt;netdb.h&#62;
 101
 102      int
 103      net_addrcmp(struct sockaddr *sa1, struct sockaddr *sa2);
 104
 105 DESCRIPTION
 106      The net_addrcmp() function compares two socket address structures, sa1
 107      and sa2.
 108
 109 RETURN VALUES
 110      If sa1 and sa2 are for the same address, net_addrcmp() returns 0.
 111
 112      The sa_len fields are compared first.  If they do not match,
 113      net_addrcmp() returns -1 or 1 if sa1-&#62;sa_len is less than or greater than
 114      sa2-&#62;sa_len, respectively.
 115
 116      Next, the sa_family members are compared.  If they do not match,
 117      net_addrcmp() returns -1 or 1 if sa1-&#62;sa_family is less than or greater
 118      than sa2-&#62;sa_family, respectively.
 119
 120      Lastly, if each socket address structure's sa_len and sa_family fields
 121      match, the protocol-specific data (the sa_data field) is compared.  If
 122      there's a match, both sa1 and sa2 must refer to the same address, and 0
 123      is returned; otherwise, a value &#62;0 or &lt;0 is returned.
 124
 125 HISTORY
 126      A net_addrcmp() function was added in OpenBSD 2.5.
 127
 128 BSD                              July 3, 1999                              BSD
 129     </PRE
 130 ></TD
 131 ></TR
 132 ></TABLE
 133 ></DIV
 134 ><DIV
 135 CLASS="NAVFOOTER"
 136 ><HR
 137 ALIGN="LEFT"
 138 WIDTH="100%"><TABLE
 139 SUMMARY="Footer navigation table"
 140 WIDTH="100%"
 141 BORDER="0"
 142 CELLPADDING="0"
 143 CELLSPACING="0"
 144 ><TR
 145 ><TD
 146 WIDTH="33%"
 147 ALIGN="left"
 148 VALIGN="top"
 149 ><A
 150 HREF="net-common-tcpip-manpages-link-addr.html"
 151 ACCESSKEY="P"
 152 >Prev</A
 153 ></TD
 154 ><TD
 155 WIDTH="34%"
 156 ALIGN="center"
 157 VALIGN="top"
 158 ><A
 159 HREF="ecos-ref.html"
 160 ACCESSKEY="H"
 161 >Home</A
 162 ></TD
 163 ><TD
 164 WIDTH="33%"
 165 ALIGN="right"
 166 VALIGN="top"
 167 ><A
 168 HREF="net-common-tcpip-manpages-ns.html"
 169 ACCESSKEY="N"
 170 >Next</A
 171 ></TD
 172 ></TR
 173 ><TR
 174 ><TD
 175 WIDTH="33%"
 176 ALIGN="left"
 177 VALIGN="top"
 178 >link_addr</TD
 179 ><TD
 180 WIDTH="34%"
 181 ALIGN="center"
 182 VALIGN="top"
 183 ><A
 184 HREF="tcpip-library-reference.html"
 185 ACCESSKEY="U"
 186 >Up</A
 187 ></TD
 188 ><TD
 189 WIDTH="33%"
 190 ALIGN="right"
 191 VALIGN="top"
 192 >ns</TD
 193 ></TR
 194 ></TABLE
 195 ></DIV
 196 ></BODY
 197 ></HTML
 198 >