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/**
* @file llhost.cpp
* @brief Encapsulates an IP address and a port.
*
* Copyright (c) 2000-$CurrentYear$, Linden Research, Inc.
* $License$
*/
#include "linden_common.h"
#include "llhost.h"
#include "llerror.h"
#if LL_WINDOWS
#define WIN32_LEAN_AND_MEAN
#include <winsock2.h>
#else
#include <netdb.h>
#include <netinet/in.h> // ntonl()
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#endif
LLHost LLHost::invalid(INVALID_PORT,INVALID_HOST_IP_ADDRESS);
LLHost::LLHost(const std::string& ip_and_port)
{
std::string::size_type colon_index = ip_and_port.find(":");
if (colon_index != std::string::npos)
{
mIP = ip_string_to_u32(ip_and_port.c_str());
mPort = 0;
}
else
{
std::string ip_str(ip_and_port, 0, colon_index);
std::string port_str(ip_and_port, colon_index+1);
mIP = ip_string_to_u32(ip_str.c_str());
mPort = atol(port_str.c_str());
}
}
void LLHost::getString(char* buffer, S32 length) const
{
if (((U32) length) < MAXADDRSTR + 1 + 5)
{
llerrs << "LLHost::getString - string too short" << llendl;
return;
}
snprintf(buffer, length, "%s:%u", u32_to_ip_string(mIP), mPort); /*Flawfinder: ignore*/
}
void LLHost::getIPString(char* buffer, S32 length) const
{
if ( ((U32) length) < MAXADDRSTR)
{
llerrs << "LLHost::getIPString - string too short" << llendl;
return;
}
snprintf(buffer, length, "%s", u32_to_ip_string(mIP)); /*Flawfinder: ignore*/
}
std::string LLHost::getIPandPort() const
{
char buffer[MAXADDRSTR + 1 + 5]; /*Flawfinder: ignore*/
getString(buffer, sizeof(buffer));
return buffer;
}
std::string LLHost::getIPString() const
{
return std::string( u32_to_ip_string( mIP ) );
}
void LLHost::getHostName(char *buf, S32 len) const
{
hostent *he;
if (INVALID_HOST_IP_ADDRESS == mIP)
{
llwarns << "LLHost::getHostName() : Invalid IP address" << llendl;
buf[0] = '\0';
return;
}
he = gethostbyaddr((char *)&mIP, sizeof(mIP), AF_INET);
if (!he)
{
#if LL_WINDOWS
llwarns << "LLHost::getHostName() : Couldn't find host name for address " << mIP << ", Error: "
<< WSAGetLastError() << llendl;
#else
llwarns << "LLHost::getHostName() : Couldn't find host name for address " << mIP << ", Error: "
<< h_errno << llendl;
#endif
buf[0] = '\0';
}
else
{
strncpy(buf, he->h_name, len); /*Flawfinder: ignore*/
buf[len-1] = '\0';
}
}
LLString LLHost::getHostName() const
{
hostent *he;
if (INVALID_HOST_IP_ADDRESS == mIP)
{
llwarns << "LLHost::getHostName() : Invalid IP address" << llendl;
return "";
}
he = gethostbyaddr((char *)&mIP, sizeof(mIP), AF_INET);
if (!he)
{
#if LL_WINDOWS
llwarns << "LLHost::getHostName() : Couldn't find host name for address " << mIP << ", Error: "
<< WSAGetLastError() << llendl;
#else
llwarns << "LLHost::getHostName() : Couldn't find host name for address " << mIP << ", Error: "
<< h_errno << llendl;
#endif
return "";
}
else
{
LLString hostname = he->h_name;
return hostname;
}
}
BOOL LLHost::setHostByName(const char *string)
{
hostent *he;
char local_name[MAX_STRING]; /*Flawfinder: ignore*/
if (strlen(string)+1 > MAX_STRING) /*Flawfinder: ignore*/
{
llerrs << "LLHost::setHostByName() : Address string is too long: "
<< string << llendl;
}
strncpy(local_name, string,MAX_STRING); /*Flawfinder: ignore*/
local_name[MAX_STRING-1] = '\0';
#if LL_WINDOWS
// We may need an equivalent for Linux, but not sure - djs
_strupr(local_name);
#endif
he = gethostbyname(local_name);
if(!he)
{
U32 ip_address = inet_addr(string);
he = gethostbyaddr((char *)&ip_address, sizeof(ip_address), AF_INET);
}
if (he)
{
mIP = *(U32 *)he->h_addr_list[0];
return TRUE;
}
else
{
setAddress(local_name);
// In windows, h_errno is a macro for WSAGetLastError(), so store value here
S32 error_number = h_errno;
switch(error_number)
{
case TRY_AGAIN: // XXX how to handle this case?
llwarns << "LLHost::setAddress(): try again" << llendl;
break;
case HOST_NOT_FOUND:
case NO_ADDRESS: // NO_DATA
llwarns << "LLHost::setAddress(): host not found" << llendl;
break;
case NO_RECOVERY:
llwarns << "LLHost::setAddress(): unrecoverable error" << llendl;
break;
default:
llwarns << "LLHost::setAddress(): unknown error - " << error_number << llendl;
break;
}
return FALSE;
}
}
LLHost& LLHost::operator=(const LLHost &rhs)
{
if (this != &rhs)
{
set(rhs.getAddress(), rhs.getPort());
}
return *this;
}
std::ostream& operator<< (std::ostream& os, const LLHost &hh)
{
os << u32_to_ip_string(hh.mIP) << ":" << hh.mPort ;
return os;
}
std::istream& operator>> (std::istream& is, LLHost &rh)
{
is >> rh.mIP;
is >> rh.mPort;
return is;
}
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