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//
// Copyright (c) 1994, 1995, 2006 by Mike Romberg ( mike.romberg@noaa.gov )
//
// This file may be distributed under terms of the GPL
//
#include <stdlib.h>
#include <string.h>
#include "Host.h"
#if defined(__hpux__) || defined(__hpux)
extern int h_errno;
#endif
Host::Host(const char *hostname){
struct hostent *hent = gethostbyname(hostname);
check(hent);
copy(hent);
}
Host::Host(const struct in_addr *address){
constuct(address);
}
Host::Host(unsigned int addr){
struct in_addr ia;
ia.s_addr = htonl(addr);
constuct(&ia);
}
bool Host::constuct(const struct in_addr *address){
struct hostent *hent = gethostbyaddr((char *)address, sizeof(in_addr),
AF_INET);
bool tmp = check(hent);
copy(hent);
return tmp;
}
void Host::copy(const struct hostent *hent){
_hent.h_name = NULL;
_hent.h_aliases = NULL;
_numAliases = 0;
_hent.h_addrtype = -1;
_hent.h_length = -1;
_numAddresses = 0;
_hent.h_addr_list = NULL;
_valid = false;
if (hent != NULL){
// Then it is valid.
_valid = true;
// find the number of aliases.
char **tmp = hent->h_aliases;
while (*tmp != NULL){
_numAliases++;
tmp++;
}
// copy the official name.
int hnamelen = strlen(hent->h_name) + 1;
_hent.h_name = new char[hnamelen];
memcpy(_hent.h_name, hent->h_name, hnamelen);
// copy the aliases.
_hent.h_aliases = new char *[_numAliases + 1];
for (int i = 0 ; i < _numAliases ; i++){
int len = strlen(hent->h_aliases[i]) + 1;
_hent.h_aliases[i] = new char[len];
memcpy(_hent.h_aliases[i], hent->h_aliases[i], len);
}
_hent.h_aliases[_numAliases] = NULL;
// copy the address type and length.
_hent.h_addrtype = hent->h_addrtype;
_hent.h_length = hent->h_length;
// find the number of addresses.
char **taddr = hent->h_addr_list;
while (*taddr != NULL){
_numAddresses++;
taddr++;
}
// copy the addresses.
_hent.h_addr_list = new char *[_numAddresses + 1];
for (int j = 0 ; j < _numAddresses ; j++){
_hent.h_addr_list[j] = (char *)new in_addr;
memcpy(_hent.h_addr_list[j], hent->h_addr_list[j], sizeof(in_addr));
}
_hent.h_addr_list[_numAddresses] = NULL;
}
}
Host::~Host(void){
clear();
}
void Host::clear(void){
_valid = false;
delete[] _hent.h_name;
_hent.h_name = NULL;
for (int i = 0 ; i < _numAliases ; i++)
delete[] _hent.h_aliases[i];
delete[] _hent.h_aliases;
_hent.h_aliases = NULL;
for (int j = 0 ; j < _numAddresses ; j++)
delete _hent.h_addr_list[j];
delete[] _hent.h_addr_list;
_hent.h_addr_list = NULL;
_numAliases = 0;
_hent.h_addrtype = -1;
_hent.h_length = -1;
_numAddresses = 0;
}
bool Host::check(const struct hostent *hent) {
if (hent != NULL) // all is well
return true;
_valid = false;
_failure = h_errno;
return false;
}
int Host::reasonForFailure(void) const{
if (_valid)
return 0; //NETDB_SUCCESS;
return _failure;
}
bool Host::tryAgain(void) const {
if (reasonForFailure() == TRY_AGAIN)
return true;
return false;
}
bool Host::operator==(const Host& host) const {
if (valid() != host.valid())
return false;
if (!valid()) // they are both invalid
return true;
// now check all of the addresses for each host.
for (int i = 0 ; i < _numAddresses ; i++)
for (int j = 0 ; j < host.numAddresses() ; j++)
if (address(i)->s_addr == host.address(j)->s_addr)
return true;
return false;
}
std::ostream &Host::print(std::ostream& os) const {
/* Cast 'this' to a char*, so we don't need to create a Host::! operator.*/
if (!*((char*)this))
return os <<"Invalid Host. h_errno was = " <<_failure <<"\n";
os <<"---- Host ----\n"
<<"Official Name = " <<officialName() <<"\n"
<<"Aliases = ";
for (int i = 0 ; i < numAliases() ; i++){
os <<alias(i);
if (i != numAliases() - 1)
os <<", ";
}
os <<"\n";
os <<"Address Type = " <<addrType() <<"\n"
<<"Address Length = " <<addrLength() <<"\n"
<<"Addresses = ";
for (int j = 0 ; j < numAddresses() ; j++){
os <<strAddress(j);
if (j != numAddresses() - 1)
os <<", ";
}
return os;
}
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