Annotation of libwww/Library/src/HTInet.html, revision 2.2
2.1 frystyk 1: <HTML>
2: <HEAD>
2.2 ! frystyk 3: <!-- Changed by: Henrik Frystyk Nielsen, 20-May-1996 -->
! 4: <TITLE>W3C Reference Library libwww Generic Network Communication</TITLE>
2.1 frystyk 5: </HEAD>
6: <BODY>
2.2 ! frystyk 7: <H1>
! 8: Generic Network Communication
! 9: </H1>
2.1 frystyk 10: <PRE>
11: /*
12: ** (c) COPYRIGHT MIT 1995.
13: ** Please first read the full copyright statement in the file COPYRIGH.
14: */
15: </PRE>
2.2 ! frystyk 16: <P>
! 17: This module has the common code for handling typical Internet functions like
! 18: getting the name of the local host, getting the domain name and email address
! 19: of user, parsing error codes returned in <CODE>errno</CODE> or equivalent
! 20: etc.
! 21: <P>
2.1 frystyk 22: This module is implemented by <A HREF="HTInet.c">HTInet.c</A>, and it is
2.2 ! frystyk 23: a part of the <A HREF="http://www.w3.org/pub/WWW/Library/">W3C Reference
! 24: Library</A>.
2.1 frystyk 25: <PRE>
26: #ifndef HTINET_H
27: #define HTINET_H
28: #include "HTReq.h"
29: #include "HTNet.h"
30: </PRE>
2.2 ! frystyk 31: <H2>
! 32: System Description of Error Message
! 33: </H2>
! 34: <P>
! 35: Return error message corresponding to errno number given. We need to pass
! 36: the error number as a parameter as we on some platforms get different codes
! 37: from sockets and local file access.
2.1 frystyk 38: <PRE>
39: extern const char * HTErrnoString (int errnum);
40: extern int HTInetStatus (int errnum, char * where);
41: </PRE>
2.2 ! frystyk 42: <H2>
! 43: Parse a Cardinal Value
! 44: </H2>
! 45: <P>
! 46: Converts a string to a cardinal value. On entry: *pp points to first character
! 47: to be interpreted, terminated by non 0..9 character. *pstatus points to status
! 48: already valid, maxvalue gives the largest allowable value. On exit: *pp points
! 49: to first unread character, *pstatus points to status updated iff bad
2.1 frystyk 50: <PRE>
51: extern unsigned int HTCardinal (int * pstatus,
52: char ** pp,
53: unsigned int max_value);
54: </PRE>
2.2 ! frystyk 55: <H2>
! 56: Produce a string for an internet address
! 57: </H2>
! 58: <P>
! 59: This function is equivalent to the BSD system call <B>inet_ntoa</B> in that
! 60: it converts a numeric 32-bit IP-address to a dotted-notation decimal string.
! 61: The pointer returned points to static memory which must be copied if it is
! 62: to be kept.
2.1 frystyk 63: <PRE>
64: extern const char * HTInetString (struct sockaddr_in * sin);
65: </PRE>
2.2 ! frystyk 66: <H2>
! 67: Parse a network node address and port
! 68: </H2>
! 69: <P>
! 70: It is assumed that any portnumber and numeric host address is given in decimal
! 71: notation. Separation character is '.' Any port number given in host name
! 72: overrides all other values. 'host' might be modified.
2.1 frystyk 73: <PRE>
74: extern int HTParseInet (HTNet * net, char * host);
75: </PRE>
2.2 ! frystyk 76: <H2>
! 77: Timezone Offset
! 78: </H2>
! 79: <P>
! 80: Calculates the offset from GMT in <I>seconds</I>.
! 81: <PRE>
! 82: extern time_t HTGetTimeZoneOffset (void);
! 83: </PRE>
! 84: <H2>
! 85: FQDN of this Host
! 86: </H2>
! 87: <P>
! 88: This function returns a the name of this host or NULL if not available. The
! 89: name is stored in a static variable.
! 90: <PRE>
! 91: extern char * HTGetHostName (void);
! 92: </PRE>
! 93: <H2>
! 94: User Email Address
! 95: </H2>
! 96: <P>
! 97: This functions returns a char pointer to a static location containing the
! 98: mail address of the current user. The static location is different from the
! 99: one of the current host name so different values can be assigned. The default
! 100: value is <CODE><USER>@hostname</CODE> where hostname is as returned
! 101: by <I>HTGetHostName()</I>.
2.1 frystyk 102: <PRE>
103: #ifndef HT_DEFAULT_LOGIN
104: #define HT_DEFAULT_LOGIN "libwww"
105: #endif
106:
2.2 ! frystyk 107: extern char * HTGetMailAddress (void);
2.1 frystyk 108: </PRE>
2.2 ! frystyk 109: <H2>
! 110: News server
! 111: </H2>
! 112: <P>
! 113: The default news host is "news" but you can get ans set the value here.
! 114: <PRE>extern char * HTGetNewsServer (void);
! 115: </PRE>
! 116: <H2>
! 117: Signal Handling
! 118: </H2>
! 119: <P>
! 120: This is only necessary to compile on a few platforms and only if the application
! 121: does not have its own signal handling. It is required on Solaris 2.3 (and
! 122: other SVR4 platforms?) due to a bug in the TCP kernel. When a
! 123: <CODE>connect()</CODE> is tried to a illegal port, solaris gives a SIGPIPE
! 124: signal instead of returning <EM>Connection refused</EM>.
2.1 frystyk 125: <PRE>
126: #ifdef WWWLIB_SIG
127: extern void HTSetSignal (void);
128: #endif
129:
130: #endif /* HTINET_H */
131: </PRE>
2.2 ! frystyk 132: <P>
! 133: <HR>
2.1 frystyk 134: <ADDRESS>
2.2 ! frystyk 135: @(#) $Id: HTInet.html,v 2.1 1996/04/12 17:47:25 frystyk Exp $
2.1 frystyk 136: </ADDRESS>
2.2 ! frystyk 137: </BODY></HTML>
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