/** * @file llhost.cpp * @brief Encapsulates an IP address and a port. * * $LicenseInfo:firstyear=2000&license=viewerlgpl$ * Second Life Viewer Source Code * Copyright (C) 2010, Linden Research, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; * version 2.1 of the License only. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA * $/LicenseInfo$ */ #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()); } } std::string LLHost::getString() const { return llformat("%s:%u", u32_to_ip_string(mIP), mPort); } std::string LLHost::getIPandPort() const { return getString(); } std::string LLHost::getIPString() const { return std::string( u32_to_ip_string( mIP ) ); } std::string LLHost::getHostName() const { hostent* he; if (INVALID_HOST_IP_ADDRESS == mIP) { llwarns << "LLHost::getHostName() : Invalid IP address" << llendl; return std::string(); } 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 std::string(); } else { return ll_safe_string(he->h_name); } } BOOL LLHost::setHostByName(const std::string& hostname) { hostent *he; std::string local_name(hostname); #if LL_WINDOWS // We may need an equivalent for Linux, but not sure - djs LLStringUtil::toUpper(local_name); #endif he = gethostbyname(local_name.c_str()); if(!he) { U32 ip_address = ip_string_to_u32(hostname.c_str()); 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; //}