mirror of
https://github.com/alliedmodders/hl2sdk.git
synced 2025-09-19 12:06:07 +08:00
Imported tier1 and mathlib code from L4D2 SDK.
This commit is contained in:
Scott Ehlert
331
tier1/NetAdr.cpp
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331
tier1/NetAdr.cpp
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//===== Copyright <20> 1996-2005, Valve Corporation, All rights reserved. ======//
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//
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// Purpose:
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//
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// NetAdr.cpp: implementation of the CNetAdr class.
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//
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//===========================================================================//
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#if defined( _WIN32 ) && !defined( _X360 )
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#include <windows.h>
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#endif
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#include "tier0/dbg.h"
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#include "netadr.h"
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#include "tier1/strtools.h"
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#if defined( _WIN32 ) && !defined( _X360 )
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#define WIN32_LEAN_AND_MEAN
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#include <winsock.h>
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typedef int socklen_t;
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#elif !defined( _X360 )
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#include <netinet/in.h> // ntohs()
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#include <netdb.h> // gethostbyname()
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#include <sys/socket.h> // getsockname()
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#endif
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// memdbgon must be the last include file in a .cpp file!!!
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#include "tier0/memdbgon.h"
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//////////////////////////////////////////////////////////////////////
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// Construction/Destruction
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//////////////////////////////////////////////////////////////////////
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bool netadr_t::CompareAdr (const netadr_t &a, bool onlyBase) const
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{
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if ( a.type != type )
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return false;
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if ( type == NA_LOOPBACK )
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return true;
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if ( type == NA_BROADCAST )
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return true;
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if ( type == NA_IP )
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{
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if ( !onlyBase && (port != a.port) )
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return false;
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if ( a.ip[0] == ip[0] && a.ip[1] == ip[1] && a.ip[2] == ip[2] && a.ip[3] == ip[3] )
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return true;
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}
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return false;
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}
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bool netadr_t::CompareClassBAdr (const netadr_t &a) const
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{
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if ( a.type != type )
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return false;
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if ( type == NA_LOOPBACK )
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return true;
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if ( type == NA_IP )
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{
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if (a.ip[0] == ip[0] && a.ip[1] == ip[1] )
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return true;
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}
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return false;
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}
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bool netadr_t::CompareClassCAdr (const netadr_t &a) const
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{
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if ( a.type != type )
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return false;
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if ( type == NA_LOOPBACK )
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return true;
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if ( type == NA_IP )
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{
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if (a.ip[0] == ip[0] && a.ip[1] == ip[1] && a.ip[2] == ip[2] )
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return true;
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}
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return false;
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}
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// reserved addresses are not routeable, so they can all be used in a LAN game
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bool netadr_t::IsReservedAdr () const
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{
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if ( type == NA_LOOPBACK )
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return true;
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if ( type == NA_IP )
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{
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if ( (ip[0] == 10) || // 10.x.x.x is reserved
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(ip[0] == 127) || // 127.x.x.x
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(ip[0] == 172 && ip[1] >= 16 && ip[1] <= 31) || // 172.16.x.x - 172.31.x.x
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(ip[0] == 192 && ip[1] >= 168) ) // 192.168.x.x
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return true;
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}
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return false;
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}
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const char * netadr_t::ToString(bool baseOnly) const
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{
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static char s[64];
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Q_strncpy (s, "unknown", sizeof( s ) );
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if (type == NA_LOOPBACK)
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{
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Q_strncpy (s, "loopback", sizeof( s ) );
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}
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else if (type == NA_BROADCAST)
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{
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Q_strncpy (s, "broadcast", sizeof( s ) );
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}
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else if (type == NA_IP)
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{
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if ( baseOnly)
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{
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Q_snprintf (s, sizeof( s ), "%i.%i.%i.%i", ip[0], ip[1], ip[2], ip[3]);
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}
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else
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{
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Q_snprintf (s, sizeof( s ), "%i.%i.%i.%i:%i", ip[0], ip[1], ip[2], ip[3], ntohs(port));
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}
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}
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return s;
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}
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bool netadr_t::IsLocalhost() const
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{
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// are we 127.0.0.1 ?
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return (ip[0] == 127) && (ip[1] == 0) && (ip[2] == 0) && (ip[3] == 1);
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}
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bool netadr_t::IsLoopback() const
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{
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// are we useding engine loopback buffers
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return type == NA_LOOPBACK;
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}
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void netadr_t::Clear()
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{
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ip[0] = ip[1] = ip[2] = ip[3] = 0;
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port = 0;
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type = NA_NULL;
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}
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void netadr_t::SetIP(uint8 b1, uint8 b2, uint8 b3, uint8 b4)
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{
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ip[0] = b1;
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ip[1] = b2;
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ip[2] = b3;
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ip[3] = b4;
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}
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void netadr_t::SetIP(uint unIP)
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{
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*((uint*)ip) = BigLong( unIP );
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}
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void netadr_t::SetType(netadrtype_t newtype)
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{
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type = newtype;
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}
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netadrtype_t netadr_t::GetType() const
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{
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return type;
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}
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unsigned short netadr_t::GetPort() const
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{
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return BigShort( port );
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}
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unsigned int netadr_t::GetIP() const
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{
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return *(unsigned int *)&ip;;
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}
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unsigned long netadr_t::addr_ntohl() const
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{
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return ntohl( GetIP() );
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}
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unsigned long netadr_t::addr_htonl() const
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{
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return htonl( GetIP() );
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}
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void netadr_t::ToSockadr (struct sockaddr * s) const
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{
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Q_memset ( s, 0, sizeof(struct sockaddr));
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if (type == NA_BROADCAST)
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{
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((struct sockaddr_in*)s)->sin_family = AF_INET;
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((struct sockaddr_in*)s)->sin_port = port;
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((struct sockaddr_in*)s)->sin_addr.s_addr = INADDR_BROADCAST;
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}
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else if (type == NA_IP)
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{
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((struct sockaddr_in*)s)->sin_family = AF_INET;
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((struct sockaddr_in*)s)->sin_addr.s_addr = *(int *)&ip;
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((struct sockaddr_in*)s)->sin_port = port;
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}
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else if (type == NA_LOOPBACK )
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{
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((struct sockaddr_in*)s)->sin_family = AF_INET;
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((struct sockaddr_in*)s)->sin_port = port;
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((struct sockaddr_in*)s)->sin_addr.s_addr = INADDR_LOOPBACK ;
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}
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}
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bool netadr_t::SetFromSockadr(const struct sockaddr * s)
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{
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if (s->sa_family == AF_INET)
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{
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type = NA_IP;
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*(int *)&ip = ((struct sockaddr_in *)s)->sin_addr.s_addr;
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port = ((struct sockaddr_in *)s)->sin_port;
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return true;
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}
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else
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{
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Clear();
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return false;
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}
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}
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bool netadr_t::IsValid() const
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{
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return ( (port !=0 ) && (type != NA_NULL) &&
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( ip[0] != 0 || ip[1] != 0 || ip[2] != 0 || ip[3] != 0 ) );
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}
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#ifdef _WIN32
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#undef SetPort // get around stupid WINSPOOL.H macro
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#endif
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void netadr_t::SetPort(unsigned short newport)
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{
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port = BigShort( newport );
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}
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void netadr_t::SetFromString( const char *pch, bool bUseDNS )
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{
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Clear();
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type = NA_IP;
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Assert( pch ); // invalid to call this with NULL pointer; fix your code bug!
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if ( !pch ) // but let's not crash
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return;
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if ( pch[0] >= '0' && pch[0] <= '9' && strchr( pch, '.' ) )
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{
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int n1, n2, n3, n4, n5;
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int nRes = sscanf( pch, "%d.%d.%d.%d:%d", &n1, &n2, &n3, &n4, &n5 );
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if ( nRes >= 4 )
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{
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SetIP( n1, n2, n3, n4 );
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}
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if ( nRes == 5 )
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{
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SetPort( ( uint16 ) n5 );
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}
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}
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else if ( bUseDNS )
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{
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// X360TBD:
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#if !defined( _X360 )
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char szHostName[ 256 ];
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Q_strncpy( szHostName, pch, sizeof(szHostName) );
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char *pchColon = strchr( szHostName, ':' );
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if ( pchColon )
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{
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*pchColon = 0;
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}
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// DNS it
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struct hostent *h = gethostbyname( szHostName );
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if ( !h )
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return;
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SetIP( ntohl( *(int *)h->h_addr_list[0] ) );
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if ( pchColon )
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{
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SetPort( atoi( ++pchColon ) );
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}
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#else
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Assert( 0 );
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#endif
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}
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}
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bool netadr_t::operator<(const netadr_t &netadr) const
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{
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if ( *((uint *)netadr.ip) < *((uint *)ip) )
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return true;
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else if ( *((uint *)netadr.ip) > *((uint *)ip) )
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return false;
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return ( netadr.port < port );
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}
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void netadr_t::SetFromSocket( int hSocket )
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{
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#if !defined(_X360)
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Clear();
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type = NA_IP;
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struct sockaddr address;
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int namelen = sizeof(address);
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if ( getsockname( hSocket, (struct sockaddr *)&address, (socklen_t *)&namelen) == 0 )
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{
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SetFromSockadr( &address );
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}
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#else
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Assert(0);
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#endif
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}
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