/* resolv.h: DNS Resolver * * Copyright (C) 1998  Kenneth Albanowski <kjahds@kjahds.com>, *                     The Silver Hammer Group, Ltd. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. */#ifndef _RESOLV_H_#define _RESOLV_H_#include <netdb.h>#include <netinet/in.h>struct resolv_header {        int id;        int qr,opcode,aa,tc,rd,ra,rcode;        int qdcount;        int ancount;        int nscount;        int arcount;};struct resolv_question {        char * dotted;        int qtype;        int qclass;};struct resolv_answer {        char * dotted;        int atype;        int aclass;        int ttl;        int rdlength;        unsigned char * rdata;        int rdoffset;};int encode_header(struct resolv_header * h, unsigned char * dest, int maxlen);int decode_header(unsigned char * data, struct resolv_header * h);int encode_dotted(const char * dotted, unsigned char * dest, int maxlen);int decode_dotted(const unsigned char * message, int offset,        char * dest, int maxlen);int length_dotted(const unsigned char * message, int offset);int encode_question(struct resolv_question * q,        unsigned char * dest, int maxlen);int decode_question(unsigned char * message, int offset,        struct resolv_question * q);int length_question(unsigned char * message, int offset);int encode_answer(struct resolv_answer * a,        unsigned char * dest, int maxlen);int decode_answer(unsigned char * message, int offset,        struct resolv_answer * a);const char * resolve_name(const char * name, int mailbox);int encode_packet(struct resolv_header * h,        struct resolv_question ** q,        struct resolv_answer ** an,        struct resolv_answer ** ns,        struct resolv_answer ** ar,        unsigned char * dest, int maxlen);int decode_packet(unsigned char * data, struct resolv_header * h);int dns_lookup(const char * name, int type, int nscount, char ** nsip,        unsigned char ** outpacket, struct resolv_answer * a);int resolve_address(const char * address,        int nscount, char ** nsip,        struct in_addr * in);int resolve_mailbox(const char * address,        int nscount, char ** nsip,        struct in_addr * in);extern int open_nameservers(void);extern void close_nameservers(void);extern struct hostent * gethostbyname(const char * name);//extern struct hostent * gethostbyaddr(const char * addr, size_t len, int type);extern void setNameServer(const char *ns1, const char *ns2);#endif /*_RESOLV_H_*/