dns_relay.h

DNS 的实现代码

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# (c) Copyright Virata Limited 2002
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/*
 * file:  dns_relay.h
 *
 * description:  this file contains prototypes and declarations for using
 *               dns relay routines.
 */

#ifndef _DNS_RELAY_H
#define _DNS_RELAY_H 

#ifdef __cplusplus
extern "C" {
#endif

/* How many DNS server addesses can we hold? per LIST (manual and PPP/DHCP) */
#define DNS_RELAY_MAX_SERVERS    (2)

	/*Total DNS servers ( both Manual and PPP/DHCP) */
#define DNS_RELAY_TOTAL_SERVERS  ( 2*DNS_RELAY_MAX_SERVERS )


#define MANUALLY_CONFIGURED_DNS_SERVER  1
#define DHCP_CONFIGURED_DNS_SERVER      2 
#define PPP_CONFIGURED_DNS_SERVER       3


/*********************************************************************/
/*Enable any of these TWO below hashdefs to assign the priority to the
server list processing*/
/**********************************************************************/
#define MANUAL_CONFIGURED_SERVER_PRIORITY 1
/*#define EXTERNAL_CONFIGURED_SERVER_PRIORITY 1*/

/* 
 * dns relay local host structure.
 *
 * this structure contains the information to insert data into the lan 
 * database.
 */

struct dns_host {
    char           hname[DNS_NAMEMAX+1]; /* host name */
    char           **alist;              /* list of aliases, none longer than DNS_NAMEMAX */
    int            nalias;               /* number of aliases in the list */ 
    unsigned long  *ipaddrs;             /* list of IP addresses for this host */ 
    int            naddr;                /* number of the IP addresses in the list */ 
    BOOL           is_ipv6;            /* whether entry to be inserted is for IPv6 or IPv4 host */

};

extern int dns_relay_set_v6_server( struct in6_addr *sDNSserver1, struct in6_addr *sDNSserver2);

#ifdef __cplusplus
}
#endif

#endif