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Programming
C dynamic pointer
Post 302295043 by Corona688 on Friday 6th of March 2009 11:26:35 AM
03-06-2009
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LEARN ABOUT SUNOS
netdb.h
netdb.h(3HEAD) Headers netdb.h(3HEAD) NAME
netdb.h, netdb - definitions for network database operations SYNOPSIS
#include <netdb.h> DESCRIPTION
The <netdb.h> header defines the type in_port_t and the type in_addr_t as described in in.h(3HEAD). The <netdb.h> header defines the hostent structure that includes the following members: char *h_name /* official name of the host */ char **h_aliases /* pointer to an array of pointers to alternative */ /* host names, terminated by a null pointer */ int h_addrtype /* address type */ int h_length /* length, in bytes, of the address */ char **h_addr_list /* pointer to an array of pointers to network addresses */ /* (in network byte order) for the host, terminated by a */ /* null pointer */ The <netdb.h> header defines the netent structure that includes the following members: char *n_name /* official, fully-qualified (including the domain) name */ /* of the network */ char **n_aliases /* pointer to an array of pointers to alternative */ /* network names, terminated by a null pointer */ int n_addrtype /* the address type of the network */ in_addr_t n_net /* the network number, in host byte order */ The <netdb.h> header defines the protoent structure that includes the following members: char *p_name /* official name of the protocol */ char **p_aliases /* pointer to an array of pointers to alternative */ /* protocol names, terminated by a null pointer */ int p_proto /* protocol number */ The <netdb.h> header defines the servent structure that includes the following members: char *s_name /* fficial name of the service */ char **s_aliases /* pointer to an array of pointers to alternative */ /* service names, terminated by a null pointer */ int s_port /* port number at which the service resides, */ /* in network byte order */ char *s_proto /* name of the protocol to use when */ /* contacting the service */ The <netdb.h> header defines the macro IPPORT_RESERVED with the value of the highest reserved Internet port number. The <netdb.h> header provides a declaration for h_errno: extern int h_errno; The <netdb.h> header defines the following macros for use as error values for gethostbyaddr() and gethostbyname(): HOST_NOT_FOUND NO_DATA NO_RECOVERY TRY_AGAIN Inclusion of the <netdb.h> header may also make visible all symbols from in.h(3HEAD). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ SEE ALSO
intro(3), endhostent(3NSL), endhostent(3XNET), endnetent(3SOCKET), endnetent(3XNET), endprotoent(3SOCKET), endprotoent(3XNET), endser- vent(3SOCKET), endservent(3XNET), in.h(3HEAD), attributes(5), standards(5) SunOS 5.10 10 Sep 2004 netdb.h(3HEAD)