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Kart-Public/src/i_tcp.c
Alam Ed Arias 7285f9ff1d Netcode: handle NULL in addrinfo lookup
2018-12-22 21:06:13 -05:00

1559 lines
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// SONIC ROBO BLAST 2
//-----------------------------------------------------------------------------
// Copyright (C) 1998-2000 by DooM Legacy Team.
// Copyright (C) 1999-2018 by Sonic Team Junior.
//
// This program is free software distributed under the
// terms of the GNU General Public License, version 2.
// See the 'LICENSE' file for more details.
//-----------------------------------------------------------------------------
/// \file i_tcp.c
/// \brief TCP driver, socket code.
/// This is not really OS-dependent because all OSes have the same socket API.
/// Just use ifdef for OS-dependent parts.
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#ifdef __GNUC__
#include <unistd.h>
#endif
#ifdef __OS2__
#include <sys/types.h>
#include <sys/time.h>
#endif // __OS2__
#ifdef _PS3
#define NO_IPV6 // PSL1GHT v2 do not have IPv6 support
#endif
#ifndef NO_IPV6
#define HAVE_IPV6
#endif
#if defined (_WIN32) || defined (_WIN32_WCE)
#define USE_WINSOCK
#if defined (_WIN64) || defined (HAVE_IPV6)
#define USE_WINSOCK2
#else //_WIN64/HAVE_IPV6
#define USE_WINSOCK1
#endif
#endif //WIN32 OS
#ifdef _XBOX // XBox have on WinSock API?
#undef USE_WINSOCK
#undef USE_WINSOCK1
#undef USE_WINSOCK2
#endif
#ifdef USE_WINSOCK2
#include <ws2tcpip.h>
#endif
#include "doomdef.h"
#if defined (NOMD5) && !defined (NONET)
//#define NONET
#endif
#ifdef NONET
#undef HAVE_MINIUPNPC
#else
#ifdef USE_WINSOCK1
#include <winsock.h>
#elif !defined (SCOUW2) && !defined (SCOUW7) && !defined (__OS2__)
#ifdef HAVE_LWIP
#include <lwip/inet.h>
#elif !defined (USE_WINSOCK)
#include <arpa/inet.h>
#endif //normal BSD API
#ifdef HAVE_LWIP
#include <lwip/sockets.h>
#define ioctl lwip_ioctl
#elif !defined (USE_WINSOCK) //!HAVE_LWIP
#ifdef __APPLE_CC__
#ifndef _BSD_SOCKLEN_T_
#define _BSD_SOCKLEN_T_
#endif //_BSD_SOCKLEN_T_
#endif //__APPLE_CC__
#include <sys/socket.h>
#include <netinet/in.h>
#endif //normal BSD API
#if defined(_arch_dreamcast) && !defined(HAVE_LWIP)
#include <kos/net.h>
#elif defined(HAVE_LWIP)
#include <lwip/lwip.h>
#elif defined (_PS3)
#include <net/select.h>
#include <net/net.h>
#elif !defined(USE_WINSOCK) //!HAVE_LWIP
#include <netdb.h>
#include <sys/ioctl.h>
#endif //normal BSD API
#include <errno.h>
#include <time.h>
#ifdef _arch_dreamcast
#include "sdl12/SRB2DC/dchelp.h"
#endif
#if (defined (__unix__) && !defined (MSDOS)) || defined(__APPLE__) || defined (UNIXCOMMON)
#include <sys/time.h>
#endif // UNIXCOMMON
#endif // !NONET
#ifdef USE_WINSOCK
// some undefined under win32
#undef errno
//#define errno WSAGetLastError() //Alam_GBC: this is the correct way, right?
#define errno h_errno // some very strange things happen when not using h_error?!?
#ifdef EWOULDBLOCK
#undef EWOULDBLOCK
#endif
#define EWOULDBLOCK WSAEWOULDBLOCK
#ifdef EMSGSIZE
#undef EMSGSIZE
#endif
#define EMSGSIZE WSAEMSGSIZE
#ifdef ECONNREFUSED
#undef ECONNREFUSED
#endif
#define ECONNREFUSED WSAECONNREFUSED
#ifdef ETIMEDOUT
#undef ETIMEDOUT
#endif
#define ETIMEDOUT WSAETIMEDOUT
#ifndef IOC_VENDOR
#define IOC_VENDOR 0x18000000
#endif
#ifndef _WSAIOW
#define _WSAIOW(x,y) (IOC_IN|(x)|(y))
#endif
#ifndef SIO_UDP_CONNRESET
#define SIO_UDP_CONNRESET _WSAIOW(IOC_VENDOR,12)
#endif
#ifndef AI_ADDRCONFIG
#define AI_ADDRCONFIG 0x00000400
#endif
#ifndef STATUS_INVALID_PARAMETER
#define STATUS_INVALID_PARAMETER 0xC000000D
#endif
#endif
#ifdef __DJGPP__
#ifdef WATTCP // Alam_GBC: Wattcp may need this
#include <tcp.h>
#define strerror strerror_s
#else // wattcp
#include <lsck/lsck.h>
#endif // libsocket
#endif // djgpp
typedef union
{
struct sockaddr any;
struct sockaddr_in ip4;
#ifdef HAVE_IPV6
struct sockaddr_in6 ip6;
#endif
} mysockaddr_t;
#ifdef HAVE_MINIUPNPC
#ifdef STATIC_MINIUPNPC
#define STATICLIB
#endif
#include "miniupnpc/miniwget.h"
#include "miniupnpc/miniupnpc.h"
#include "miniupnpc/upnpcommands.h"
#undef STATICLIB
static UINT8 UPNP_support = TRUE;
#endif
#endif // !NONET
#define MAXBANS 100
#include "i_system.h"
#include "i_net.h"
#include "d_net.h"
#include "d_netfil.h"
#include "i_tcp.h"
#include "m_argv.h"
#include "doomstat.h"
// win32 or djgpp
#if defined (USE_WINSOCK) || defined (__DJGPP__)
// winsock stuff (in winsock a socket is not a file)
#define ioctl ioctlsocket
#define close closesocket
#ifdef _WIN32_WCE
#include "sdl12/SRB2CE/cehelp.h"
#endif
#endif
#include "i_addrinfo.h"
#ifdef __DJGPP__
#ifdef WATTCP
#define SELECTTEST
#endif
#elif defined(HAVE_LWIP)
#define SELECTTEST
#elif !defined( _arch_dreamcast)
#define SELECTTEST
#endif
#define DEFAULTPORT "5029"
#if defined (USE_WINSOCK) && !defined (NONET)
typedef SOCKET SOCKET_TYPE;
#define ERRSOCKET (SOCKET_ERROR)
#else
#if (defined (__unix__) && !defined (MSDOS)) || defined (__APPLE__) || defined (__HAIKU__) || defined(_PS3)
typedef int SOCKET_TYPE;
#else
typedef unsigned long SOCKET_TYPE;
#endif
#define ERRSOCKET (-1)
#endif
#if (defined (WATTCP) && !defined (__libsocket_socklen_t)) || defined (USE_WINSOCK1)
typedef int socklen_t;
#endif
#ifndef NONET
static SOCKET_TYPE mysockets[MAXNETNODES+1] = {ERRSOCKET};
static size_t mysocketses = 0;
static int myfamily[MAXNETNODES+1] = {0};
static SOCKET_TYPE nodesocket[MAXNETNODES+1] = {ERRSOCKET};
static mysockaddr_t clientaddress[MAXNETNODES+1];
static mysockaddr_t broadcastaddress[MAXNETNODES+1];
static size_t broadcastaddresses = 0;
static boolean nodeconnected[MAXNETNODES+1];
static mysockaddr_t banned[MAXBANS];
static UINT8 bannedmask[MAXBANS];
#endif
static size_t numbans = 0;
static boolean SOCK_bannednode[MAXNETNODES+1]; /// \note do we really need the +1?
static boolean init_tcp_driver = false;
static char port_name[8] = DEFAULTPORT;
#ifndef NONET
#ifdef WATTCP
static void wattcp_outch(char s)
{
static char old = '\0';
char pr[2] = {s,0};
if (s == old && old == ' ') return;
else old = s;
if (s == '\r') CONS_Printf("\n");
else if (s != '\n') CONS_Printf(pr);
}
#endif
#ifdef USE_WINSOCK
// stupid microsoft makes things complicated
static char *get_WSAErrorStr(int e)
{
static char buf[256]; // allow up to 255 bytes
buf[0] = '\0';
FormatMessageA(
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
(DWORD)e,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR)buf,
sizeof (buf),
NULL);
if (!buf[0]) // provide a fallback error message if no message is available for some reason
sprintf(buf, "Unknown error");
return buf;
}
#undef strerror
#define strerror get_WSAErrorStr
#endif
#ifdef USE_WINSOCK2
#define inet_ntop inet_ntopA
#define HAVE_NTOP
static const char* inet_ntopA(short af, const void *cp, char *buf, socklen_t len)
{
DWORD Dlen = len, AFlen = 0;
SOCKADDR_STORAGE any;
LPSOCKADDR anyp = (LPSOCKADDR)&any;
LPSOCKADDR_IN any4 = (LPSOCKADDR_IN)&any;
LPSOCKADDR_IN6 any6 = (LPSOCKADDR_IN6)&any;
if (!buf)
{
WSASetLastError(STATUS_INVALID_PARAMETER);
return NULL;
}
if (af != AF_INET && af != AF_INET6)
{
WSASetLastError(WSAEAFNOSUPPORT);
return NULL;
}
ZeroMemory(&any, sizeof(SOCKADDR_STORAGE));
any.ss_family = af;
switch (af)
{
case AF_INET:
{
CopyMemory(&any4->sin_addr, cp, sizeof(IN_ADDR));
AFlen = sizeof(SOCKADDR_IN);
break;
}
case AF_INET6:
{
CopyMemory(&any6->sin6_addr, cp, sizeof(IN6_ADDR));
AFlen = sizeof(SOCKADDR_IN6);
break;
}
}
if (WSAAddressToStringA(anyp, AFlen, NULL, buf, &Dlen) == SOCKET_ERROR)
return NULL;
return buf;
}
#elif !defined (USE_WINSOCK1)
#define HAVE_NTOP
#endif
#ifdef HAVE_MINIUPNPC // based on old XChat patch
static struct UPNPUrls urls;
static struct IGDdatas data;
static char lanaddr[64];
static void I_ShutdownUPnP(void)
{
FreeUPNPUrls(&urls);
}
static inline void I_InitUPnP(void)
{
struct UPNPDev * devlist = NULL;
int upnp_error = -2;
CONS_Printf(M_GetText("Looking for UPnP Internet Gateway Device\n"));
devlist = upnpDiscover(2000, NULL, NULL, 0, false, &upnp_error);
if (devlist)
{
struct UPNPDev *dev = devlist;
char * descXML;
int descXMLsize = 0;
while (dev)
{
if (strstr (dev->st, "InternetGatewayDevice"))
break;
dev = dev->pNext;
}
if (!dev)
dev = devlist; /* defaulting to first device */
CONS_Printf(M_GetText("Found UPnP device:\n desc: %s\n st: %s\n"),
dev->descURL, dev->st);
UPNP_GetValidIGD(devlist, &urls, &data, lanaddr, sizeof(lanaddr));
CONS_Printf(M_GetText("Local LAN IP address: %s\n"), lanaddr);
descXML = miniwget(dev->descURL, &descXMLsize);
if (descXML)
{
parserootdesc(descXML, descXMLsize, &data);
free(descXML);
descXML = NULL;
memset(&urls, 0, sizeof(struct UPNPUrls));
memset(&data, 0, sizeof(struct IGDdatas));
GetUPNPUrls(&urls, &data, dev->descURL);
I_AddExitFunc(I_ShutdownUPnP);
}
freeUPNPDevlist(devlist);
}
else if (upnp_error == UPNPDISCOVER_SOCKET_ERROR)
{
CONS_Printf(M_GetText("No UPnP devices discovered\n"));
}
}
static inline void I_UPnP_add(const char * addr, const char *port, const char * servicetype)
{
if (addr == NULL)
addr = lanaddr;
if (!urls.controlURL || urls.controlURL[0] == '\0')
return;
UPNP_AddPortMapping(urls.controlURL, data.first.servicetype,
port, port, addr, "SRB2", servicetype, NULL, NULL);
}
static inline void I_UPnP_rem(const char *port, const char * servicetype)
{
if (!urls.controlURL || urls.controlURL[0] == '\0')
return;
UPNP_DeletePortMapping(urls.controlURL, data.first.servicetype,
port, servicetype, NULL);
}
#endif
static const char *SOCK_AddrToStr(mysockaddr_t *sk)
{
static char s[64]; // 255.255.255.255:65535 or IPv6:65535
#ifdef HAVE_NTOP
void *addr;
if(sk->any.sa_family == AF_INET)
addr = &sk->ip4.sin_addr;
#ifdef HAVE_IPV6
else if(sk->any.sa_family == AF_INET6)
addr = &sk->ip6.sin6_addr;
#endif
else
addr = NULL;
if(addr == NULL)
sprintf(s, "No address");
else if(inet_ntop(sk->any.sa_family, addr, s, sizeof (s)) == NULL)
sprintf(s, "Unknown family type, error #%u", errno);
#ifdef HAVE_IPV6
else if(sk->any.sa_family == AF_INET6 && sk->ip6.sin6_port != 0)
strcat(s, va(":%d", ntohs(sk->ip6.sin6_port)));
#endif
else if(sk->any.sa_family == AF_INET && sk->ip4.sin_port != 0)
strcat(s, va(":%d", ntohs(sk->ip4.sin_port)));
#else
if (sk->any.sa_family == AF_INET)
{
strcpy(s, inet_ntoa(sk->ip4.sin_addr));
if (sk->ip4.sin_port != 0) strcat(s, va(":%d", ntohs(sk->ip4.sin_port)));
}
else
sprintf(s, "Unknown type");
#endif
return s;
}
#endif
static const char *SOCK_GetNodeAddress(INT32 node)
{
if (node == 0)
return "self";
#ifdef NONET
return NULL;
#else
if (!nodeconnected[node])
return NULL;
return SOCK_AddrToStr(&clientaddress[node]);
#endif
}
static const char *SOCK_GetBanAddress(size_t ban)
{
if (ban >= numbans)
return NULL;
#ifdef NONET
return NULL;
#else
return SOCK_AddrToStr(&banned[ban]);
#endif
}
static const char *SOCK_GetBanMask(size_t ban)
{
#ifdef NONET
(void)ban;
#else
static char s[16]; //255.255.255.255 netmask? no, just CDIR for only
if (ban >= numbans)
return NULL;
if (sprintf(s,"%d",bannedmask[ban]) > 0)
return s;
#endif
return NULL;
}
#ifndef NONET
static boolean SOCK_cmpaddr(mysockaddr_t *a, mysockaddr_t *b, UINT8 mask)
{
UINT32 bitmask = INADDR_NONE;
if (mask && mask < 32)
bitmask = htonl((UINT32)(-1) << (32 - mask));
if (b->any.sa_family == AF_INET)
return (a->ip4.sin_addr.s_addr & bitmask) == (b->ip4.sin_addr.s_addr & bitmask)
&& (b->ip4.sin_port == 0 || (a->ip4.sin_port == b->ip4.sin_port));
#ifdef HAVE_IPV6
else if (b->any.sa_family == AF_INET6)
return memcmp(&a->ip6.sin6_addr, &b->ip6.sin6_addr, sizeof(b->ip6.sin6_addr))
&& (b->ip6.sin6_port == 0 || (a->ip6.sin6_port == b->ip6.sin6_port));
#endif
else
return false;
}
// This is a hack. For some reason, nodes aren't being freed properly.
// This goes through and cleans up what nodes were supposed to be freed.
/** \warning This function causes the file downloading to stop if someone joins.
* How? Because it removes nodes that are connected but not in game,
* which is exactly what clients downloading a file are.
*/
static void cleanupnodes(void)
{
SINT8 j;
if (!Playing())
return;
// Why can't I start at zero?
for (j = 1; j < MAXNETNODES; j++)
if (!(nodeingame[j] || SV_SendingFile(j)))
nodeconnected[j] = false;
}
static SINT8 getfreenode(void)
{
SINT8 j;
cleanupnodes();
for (j = 0; j < MAXNETNODES; j++)
if (!nodeconnected[j])
{
nodeconnected[j] = true;
return j;
}
/** \warning No free node? Just in case a node might not have been freed properly,
* look if there are connected nodes that aren't in game, and forget them.
* It's dirty, and might result in a poor guy having to restart
* downloading a needed wad, but it's better than not letting anyone join...
*/
/*I_Error("No more free nodes!!1!11!11!!1111\n");
for (j = 1; j < MAXNETNODES; j++)
if (!nodeingame[j])
return j;*/
return -1;
}
#ifdef _DEBUG
void Command_Numnodes(void)
{
INT32 connected = 0;
INT32 ingame = 0;
INT32 i;
for (i = 1; i < MAXNETNODES; i++)
{
if (!(nodeconnected[i] || nodeingame[i]))
continue;
if (nodeconnected[i])
connected++;
if (nodeingame[i])
ingame++;
CONS_Printf("%2d - ", i);
if (nodetoplayer[i] != -1)
CONS_Printf("player %.2d", nodetoplayer[i]);
else
CONS_Printf(" ");
if (nodeconnected[i])
CONS_Printf(" - connected");
else
CONS_Printf(" - ");
if (nodeingame[i])
CONS_Printf(" - ingame");
else
CONS_Printf(" - ");
CONS_Printf(" - %s\n", I_GetNodeAddress(i));
}
CONS_Printf("\n"
"Connected: %d\n"
"Ingame: %d\n",
connected, ingame);
}
#endif
#endif
#ifndef NONET
// Returns true if a packet was received from a new node, false in all other cases
static boolean SOCK_Get(void)
{
size_t i, n;
int j;
ssize_t c;
mysockaddr_t fromaddress;
socklen_t fromlen;
for (n = 0; n < mysocketses; n++)
{
fromlen = (socklen_t)sizeof(fromaddress);
c = recvfrom(mysockets[n], (char *)&doomcom->data, MAXPACKETLENGTH, 0,
(void *)&fromaddress, &fromlen);
if (c != ERRSOCKET)
{
// find remote node number
for (j = 0; j <= MAXNETNODES; j++) //include LAN
{
if (SOCK_cmpaddr(&fromaddress, &clientaddress[j], 0))
{
doomcom->remotenode = (INT16)j; // good packet from a game player
doomcom->datalength = (INT16)c;
nodesocket[j] = mysockets[n];
return false;
}
}
// not found
// find a free slot
j = getfreenode();
if (j > 0)
{
M_Memcpy(&clientaddress[j], &fromaddress, fromlen);
nodesocket[j] = mysockets[n];
DEBFILE(va("New node detected: node:%d address:%s\n", j,
SOCK_GetNodeAddress(j)));
doomcom->remotenode = (INT16)j; // good packet from a game player
doomcom->datalength = (INT16)c;
// check if it's a banned dude so we can send a refusal later
for (i = 0; i < numbans; i++)
{
if (SOCK_cmpaddr(&fromaddress, &banned[i], bannedmask[i]))
{
SOCK_bannednode[j] = true;
DEBFILE("This dude has been banned\n");
break;
}
}
if (i == numbans)
SOCK_bannednode[j] = false;
return true;
}
else
DEBFILE("New node detected: No more free slots\n");
}
}
doomcom->remotenode = -1; // no packet
return false;
}
#endif
// check if we can send (do not go over the buffer)
#ifndef NONET
static fd_set masterset;
#ifdef SELECTTEST
static boolean FD_CPY(fd_set *src, fd_set *dst, SOCKET_TYPE *fd, size_t len)
{
size_t i;
boolean testset = false;
FD_ZERO(dst);
for (i = 0; i < len;i++)
{
if(fd[i] != (SOCKET_TYPE)ERRSOCKET &&
FD_ISSET(fd[i], src) && !FD_ISSET(fd[i], dst)) // no checking for dups
{
FD_SET(fd[i], dst);
testset = true;
}
}
return testset;
}
static boolean SOCK_CanSend(void)
{
struct timeval timeval_for_select = {0, 0};
fd_set tset;
int wselect;
if(!FD_CPY(&masterset, &tset, mysockets, mysocketses))
return false;
wselect = select(255, NULL, &tset, NULL, &timeval_for_select);
if (wselect >= 1)
return true;
return false;
}
static boolean SOCK_CanGet(void)
{
struct timeval timeval_for_select = {0, 0};
fd_set tset;
int rselect;
if(!FD_CPY(&masterset, &tset, mysockets, mysocketses))
return false;
rselect = select(255, &tset, NULL, NULL, &timeval_for_select);
if (rselect >= 1)
return true;
return false;
}
#endif
#endif
#ifndef NONET
static inline ssize_t SOCK_SendToAddr(SOCKET_TYPE socket, mysockaddr_t *sockaddr)
{
socklen_t d4 = (socklen_t)sizeof(struct sockaddr_in);
#ifdef HAVE_IPV6
socklen_t d6 = (socklen_t)sizeof(struct sockaddr_in6);
#endif
socklen_t d, da = (socklen_t)sizeof(mysockaddr_t);
switch (sockaddr->any.sa_family)
{
case AF_INET: d = d4; break;
#ifdef HAVE_IPV6
case AF_INET6: d = d6; break;
#endif
default: d = da; break;
}
return sendto(socket, (char *)&doomcom->data, doomcom->datalength, 0, &sockaddr->any, d);
}
static void SOCK_Send(void)
{
ssize_t c = ERRSOCKET;
size_t i, j;
if (!nodeconnected[doomcom->remotenode])
return;
if (doomcom->remotenode == BROADCASTADDR)
{
for (i = 0; i < mysocketses; i++)
{
for (j = 0; j < broadcastaddresses; j++)
{
if (myfamily[i] == broadcastaddress[j].any.sa_family)
SOCK_SendToAddr(mysockets[i], &broadcastaddress[j]);
}
}
return;
}
else if (nodesocket[doomcom->remotenode] == (SOCKET_TYPE)ERRSOCKET)
{
for (i = 0; i < mysocketses; i++)
{
if (myfamily[i] == clientaddress[doomcom->remotenode].any.sa_family)
SOCK_SendToAddr(mysockets[i], &clientaddress[doomcom->remotenode]);
}
return;
}
else
{
c = SOCK_SendToAddr(nodesocket[doomcom->remotenode], &clientaddress[doomcom->remotenode]);
}
if (c == ERRSOCKET)
{
int e = errno; // save error code so it can't be modified later
if (e != ECONNREFUSED && e != EWOULDBLOCK)
I_Error("SOCK_Send, error sending to node %d (%s) #%u: %s", doomcom->remotenode,
SOCK_GetNodeAddress(doomcom->remotenode), e, strerror(e));
}
}
#endif
#ifndef NONET
static void SOCK_FreeNodenum(INT32 numnode)
{
// can't disconnect from self :)
if (!numnode || numnode > MAXNETNODES)
return;
DEBFILE(va("Free node %d (%s)\n", numnode, SOCK_GetNodeAddress(numnode)));
nodeconnected[numnode] = false;
nodesocket[numnode] = ERRSOCKET;
// put invalid address
memset(&clientaddress[numnode], 0, sizeof (clientaddress[numnode]));
}
#endif
//
// UDPsocket
//
#ifndef NONET
// allocate a socket
static SOCKET_TYPE UDP_Bind(int family, struct sockaddr *addr, socklen_t addrlen)
{
SOCKET_TYPE s = socket(family, SOCK_DGRAM, IPPROTO_UDP);
int opt;
socklen_t opts;
#ifdef FIONBIO
#ifdef WATTCP
char trueval = true;
#else
unsigned long trueval = true;
#endif
#endif
mysockaddr_t straddr;
if (s == (SOCKET_TYPE)ERRSOCKET)
return (SOCKET_TYPE)ERRSOCKET;
#ifdef USE_WINSOCK
{ // Alam_GBC: disable the new UDP connection reset behavior for Win2k and up
#ifdef USE_WINSOCK2
DWORD dwBytesReturned = 0;
BOOL bfalse = FALSE;
WSAIoctl(s, SIO_UDP_CONNRESET, &bfalse, sizeof(bfalse),
NULL, 0, &dwBytesReturned, NULL, NULL);
#else
unsigned long falseval = false;
ioctl(s, SIO_UDP_CONNRESET, &falseval);
#endif
}
#endif
straddr.any = *addr;
I_OutputMsg("Binding to %s\n", SOCK_AddrToStr(&straddr));
if (family == AF_INET)
{
mysockaddr_t tmpaddr;
tmpaddr.any = *addr ;
if (tmpaddr.ip4.sin_addr.s_addr == htonl(INADDR_ANY))
{
opt = true;
opts = (socklen_t)sizeof(opt);
setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *)&opt, opts);
}
// make it broadcastable
opt = true;
opts = (socklen_t)sizeof(opt);
if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, (char *)&opt, opts))
{
CONS_Alert(CONS_WARNING, M_GetText("Could not get broadcast rights\n")); // I do not care anymore
}
}
#ifdef HAVE_IPV6
else if (family == AF_INET6)
{
if (memcmp(addr, &in6addr_any, sizeof(in6addr_any)) == 0) //IN6_ARE_ADDR_EQUAL
{
opt = true;
opts = (socklen_t)sizeof(opt);
setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *)&opt, opts);
}
#ifdef IPV6_V6ONLY
// make it IPv6 ony
opt = true;
opts = (socklen_t)sizeof(opt);
if (setsockopt(s, SOL_SOCKET, IPV6_V6ONLY, (char *)&opt, opts))
{
CONS_Alert(CONS_WARNING, M_GetText("Could not limit IPv6 bind\n")); // I do not care anymore
}
#endif
}
#endif
if (bind(s, addr, addrlen) == ERRSOCKET)
{
close(s);
I_OutputMsg("Binding failed\n");
return (SOCKET_TYPE)ERRSOCKET;
}
#ifdef FIONBIO
// make it non blocking
opt = true;
if (ioctl(s, FIONBIO, &trueval) != 0)
{
close(s);
I_OutputMsg("Seting FIOBIO on failed\n");
return (SOCKET_TYPE)ERRSOCKET;
}
#endif
opts = (socklen_t)sizeof(opt);
getsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&opt, &opts);
CONS_Printf(M_GetText("Network system buffer: %dKb\n"), opt>>10);
if (opt < 64<<10) // 64k
{
opt = 64<<10;
opts = (socklen_t)sizeof(opt);
setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&opt, opts);
getsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&opt, &opts);
if (opt < 64<<10)
CONS_Alert(CONS_WARNING, M_GetText("Can't set buffer length to 64k, file transfer will be bad\n"));
else
CONS_Printf(M_GetText("Network system buffer set to: %dKb\n"), opt>>10);
}
return s;
}
static boolean UDP_Socket(void)
{
const char *sock_port = NULL;
size_t s;
struct my_addrinfo *ai, *runp, hints;
int gaie;
#ifdef HAVE_IPV6
const INT32 b_ipv6 = M_CheckParm("-ipv6");
#endif
for (s = 0; s < mysocketses; s++)
mysockets[s] = ERRSOCKET;
for (s = 0; s < MAXNETNODES+1; s++)
nodesocket[s] = ERRSOCKET;
FD_ZERO(&masterset);
s = 0;
memset(&hints, 0x00, sizeof (hints));
hints.ai_flags = AI_NUMERICHOST;
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_protocol = IPPROTO_UDP;
if (M_CheckParm("-clientport"))
{
if (!M_IsNextParm())
I_Error("syntax: -clientport <portnum>");
sock_port = M_GetNextParm();
}
else
sock_port = port_name;
if (M_CheckParm("-bindaddr"))
{
while (M_IsNextParm())
{
gaie = I_getaddrinfo(M_GetNextParm(), sock_port, &hints, &ai);
if (gaie == 0)
{
runp = ai;
while (runp != NULL && s < MAXNETNODES+1)
{
mysockets[s] = UDP_Bind(runp->ai_family, runp->ai_addr, (socklen_t)runp->ai_addrlen);
if (mysockets[s] != (SOCKET_TYPE)ERRSOCKET)
{
FD_SET(mysockets[s], &masterset);
myfamily[s] = hints.ai_family;
s++;
}
runp = runp->ai_next;
}
I_freeaddrinfo(ai);
}
}
}
else
{
gaie = I_getaddrinfo("0.0.0.0", sock_port, &hints, &ai);
if (gaie == 0)
{
runp = ai;
while (runp != NULL && s < MAXNETNODES+1)
{
mysockets[s] = UDP_Bind(runp->ai_family, runp->ai_addr, (socklen_t)runp->ai_addrlen);
if (mysockets[s] != (SOCKET_TYPE)ERRSOCKET)
{
FD_SET(mysockets[s], &masterset);
myfamily[s] = hints.ai_family;
s++;
#ifdef HAVE_MINIUPNPC
if (UPNP_support)
{
I_UPnP_rem(sock_port, "UDP");
I_UPnP_add(NULL, sock_port, "UDP");
}
#endif
}
runp = runp->ai_next;
}
I_freeaddrinfo(ai);
}
}
#ifdef HAVE_IPV6
if (b_ipv6)
{
hints.ai_family = AF_INET6;
if (M_CheckParm("-bindaddr6"))
{
while (M_IsNextParm())
{
gaie = I_getaddrinfo(M_GetNextParm(), sock_port, &hints, &ai);
if (gaie == 0)
{
runp = ai;
while (runp != NULL && s < MAXNETNODES+1)
{
mysockets[s] = UDP_Bind(runp->ai_family, runp->ai_addr, (socklen_t)runp->ai_addrlen);
if (mysockets[s] != (SOCKET_TYPE)ERRSOCKET)
{
FD_SET(mysockets[s], &masterset);
myfamily[s] = hints.ai_family;
s++;
}
runp = runp->ai_next;
}
I_freeaddrinfo(ai);
}
}
}
else
{
gaie = I_getaddrinfo("::", sock_port, &hints, &ai);
if (gaie == 0)
{
runp = ai;
while (runp != NULL && s < MAXNETNODES+1)
{
mysockets[s] = UDP_Bind(runp->ai_family, runp->ai_addr, (socklen_t)runp->ai_addrlen);
if (mysockets[s] != (SOCKET_TYPE)ERRSOCKET)
{
FD_SET(mysockets[s], &masterset);
myfamily[s] = hints.ai_family;
s++;
}
runp = runp->ai_next;
}
I_freeaddrinfo(ai);
}
}
}
#endif
mysocketses = s;
if (s == 0) // no sockets?
return false;
s = 0;
// ip + udp
packetheaderlength = 20 + 8; // for stats
hints.ai_family = AF_INET;
gaie = I_getaddrinfo("127.0.0.1", "0", &hints, &ai);
if (gaie == 0)
{
runp = ai;
while (runp != NULL && s < MAXNETNODES+1)
{
memcpy(&clientaddress[s], runp->ai_addr, runp->ai_addrlen);
s++;
runp = runp->ai_next;
}
I_freeaddrinfo(ai);
}
else
{
clientaddress[s].any.sa_family = AF_INET;
clientaddress[s].ip4.sin_port = htons(0);
clientaddress[s].ip4.sin_addr.s_addr = htonl(INADDR_LOOPBACK); //GetLocalAddress(); // my own ip
s++;
}
s = 0;
// setup broadcast adress to BROADCASTADDR entry
gaie = I_getaddrinfo("255.255.255.255", "0", &hints, &ai);
if (gaie == 0)
{
runp = ai;
while (runp != NULL && s < MAXNETNODES+1)
{
memcpy(&broadcastaddress[s], runp->ai_addr, runp->ai_addrlen);
s++;
runp = runp->ai_next;
}
I_freeaddrinfo(ai);
}
else
{
broadcastaddress[s].any.sa_family = AF_INET;
broadcastaddress[s].ip4.sin_port = htons(0);
broadcastaddress[s].ip4.sin_addr.s_addr = htonl(INADDR_BROADCAST);
s++;
}
#ifdef HAVE_IPV6
if (b_ipv6)
{
hints.ai_family = AF_INET6;
gaie = I_getaddrinfo("ff02::1", "0", &hints, &ai);
if (gaie == 0)
{
runp = ai;
while (runp != NULL && s < MAXNETNODES+1)
{
memcpy(&broadcastaddress[s], runp->ai_addr, runp->ai_addrlen);
s++;
runp = runp->ai_next;
}
I_freeaddrinfo(ai);
}
}
#endif
broadcastaddresses = s;
doomcom->extratics = 1; // internet is very high ping
return true;
}
#endif
boolean I_InitTcpDriver(void)
{
boolean tcp_was_up = init_tcp_driver;
#ifndef NONET
if (!init_tcp_driver)
{
#ifdef USE_WINSOCK
#ifdef USE_WINSOCK2
const WORD VerNeed = MAKEWORD(2,2);
#else
const WORD VerNeed = MAKEWORD(1,1);
#endif
WSADATA WSAData;
const int WSAresult = WSAStartup(VerNeed, &WSAData);
if (WSAresult != 0)
{
LPCSTR WSError = NULL;
switch (WSAresult)
{
case WSASYSNOTREADY:
WSError = "The underlying network subsystem is not ready for network communication";
break;
case WSAEINPROGRESS:
WSError = "A blocking Windows Sockets 1.1 operation is in progress";
break;
case WSAEPROCLIM:
WSError = "Limit on the number of tasks supported by the Windows Sockets implementation has been reached";
break;
case WSAEFAULT:
WSError = "WSAData is not a valid pointer? What kind of setup do you have?";
break;
default:
WSError = va("Error code %u",WSAresult);
break;
}
if (WSAresult != WSAVERNOTSUPPORTED)
CONS_Debug(DBG_NETPLAY, "WinSock(TCP/IP) error: %s\n",WSError);
}
#ifdef USE_WINSOCK2
if(LOBYTE(WSAData.wVersion) != 2 ||
HIBYTE(WSAData.wVersion) != 2)
{
WSACleanup();
CONS_Debug(DBG_NETPLAY, "No WinSock(TCP/IP) 2.2 driver detected\n");
}
#else
if (LOBYTE(WSAData.wVersion) != 1 ||
HIBYTE(WSAData.wVersion) != 1)
{
WSACleanup();
CONS_Debug(DBG_NETPLAY, "No WinSock(TCP/IP) 1.1 driver detected\n");
}
#endif
CONS_Debug(DBG_NETPLAY, "WinSock description: %s\n",WSAData.szDescription);
CONS_Debug(DBG_NETPLAY, "WinSock System Status: %s\n",WSAData.szSystemStatus);
#endif
#ifdef HAVE_LWIP
lwip_kos_init();
#elif defined(_arch_dreamcast)
//return;
net_init();
#endif
#ifdef __DJGPP__
#ifdef WATTCP // Alam_GBC: survive bootp, dhcp, rarp and wattcp/pktdrv from failing to load
survive_eth = 1; // would be needed to not exit if pkt_eth_init() fails
survive_bootp = 1; // ditto for BOOTP
survive_dhcp = 1; // ditto for DHCP/RARP
survive_rarp = 1;
//_watt_do_exit = false;
//_watt_handle_cbreak = false;
//_watt_no_config = true;
_outch = wattcp_outch;
init_misc();
//#ifdef DEBUGFILE
dbug_init();
//#endif
switch (sock_init())
{
case 0:
init_tcp_driver = true;
break;
case 3:
CONS_Debug(DBG_NETPLAY, "No packet driver detected\n");
break;
case 4:
CONS_Debug(DBG_NETPLAY, "Error while talking to packet driver\n");
break;
case 5:
CONS_Debug(DBG_NETPLAY, "BOOTP failed\n");
break;
case 6:
CONS_Debug(DBG_NETPLAY, "DHCP failed\n");
break;
case 7:
CONS_Debug(DBG_NETPLAY, "RARP failed\n");
break;
case 8:
CONS_Debug(DBG_NETPLAY, "TCP/IP failed\n");
break;
case 9:
CONS_Debug(DBG_NETPLAY, "PPPoE login/discovery failed\n");
break;
default:
CONS_Debug(DBG_NETPLAY, "Unknown error with TCP/IP stack\n");
break;
}
hires_timer(0);
#else // wattcp
if (__lsck_init())
init_tcp_driver = true;
else
CONS_Debug(DBG_NETPLAY, "No TCP/IP driver detected\n");
#endif // libsocket
#endif // __DJGPP__
#ifdef _PS3
netInitialize();
#endif
#ifndef __DJGPP__
init_tcp_driver = true;
#endif
}
#endif
if (!tcp_was_up && init_tcp_driver)
{
I_AddExitFunc(I_ShutdownTcpDriver);
#ifdef HAVE_MINIUPNPC
if (M_CheckParm("-useUPnP"))
I_InitUPnP();
else
UPNP_support = false;
#endif
}
return init_tcp_driver;
}
#ifndef NONET
static void SOCK_CloseSocket(void)
{
size_t i;
for (i=0; i < MAXNETNODES+1; i++)
{
if (mysockets[i] != (SOCKET_TYPE)ERRSOCKET
&& FD_ISSET(mysockets[i], &masterset))
{
#if !defined (__DJGPP__) || defined (WATTCP)
FD_CLR(mysockets[i], &masterset);
close(mysockets[i]);
#endif
}
mysockets[i] = ERRSOCKET;
}
}
#endif
void I_ShutdownTcpDriver(void)
{
#ifndef NONET
SOCK_CloseSocket();
CONS_Printf("I_ShutdownTcpDriver: ");
#ifdef USE_WINSOCK
WS_addrinfocleanup();
WSACleanup();
#endif
#ifdef HAVE_LWIP
lwip_kos_shutdown();
#elif defined(_arch_dreamcast)
net_shutdown();
#endif
#ifdef __DJGPP__
#ifdef WATTCP // wattcp
//_outch = NULL;
sock_exit();
#else
__lsck_uninit();
#endif // libsocket
#endif // __DJGPP__
#ifdef _PS3
netDeinitialize();
#endif
CONS_Printf("shut down\n");
init_tcp_driver = false;
#endif
}
#ifndef NONET
static SINT8 SOCK_NetMakeNodewPort(const char *address, const char *port)
{
SINT8 newnode = -1;
struct my_addrinfo *ai = NULL, *runp, hints;
int gaie;
if (!port || !port[0])
port = port_name;
DEBFILE(va("Creating new node: %s@%s\n", address, port));
memset (&hints, 0x00, sizeof (hints));
hints.ai_flags = 0;
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_protocol = IPPROTO_UDP;
gaie = I_getaddrinfo(address, port, &hints, &ai);
if (gaie == 0)
{
newnode = getfreenode();
}
if (newnode == -1)
{
I_freeaddrinfo(ai);
return -1;
}
else
runp = ai;
while (runp != NULL)
{
// find ip of the server
memcpy(&clientaddress[newnode], runp->ai_addr, runp->ai_addrlen);
runp = NULL;
}
I_freeaddrinfo(ai);
return newnode;
}
#endif
static boolean SOCK_OpenSocket(void)
{
#ifndef NONET
size_t i;
memset(clientaddress, 0, sizeof (clientaddress));
nodeconnected[0] = true; // always connected to self
for (i = 1; i < MAXNETNODES; i++)
nodeconnected[i] = false;
nodeconnected[BROADCASTADDR] = true;
I_NetSend = SOCK_Send;
I_NetGet = SOCK_Get;
I_NetCloseSocket = SOCK_CloseSocket;
I_NetFreeNodenum = SOCK_FreeNodenum;
I_NetMakeNodewPort = SOCK_NetMakeNodewPort;
#ifdef SELECTTEST
// seem like not work with libsocket : (
I_NetCanSend = SOCK_CanSend;
I_NetCanGet = SOCK_CanGet;
#endif
// build the socket but close it first
SOCK_CloseSocket();
return UDP_Socket();
#else
return false;
#endif
}
static boolean SOCK_Ban(INT32 node)
{
if (node > MAXNETNODES)
return false;
#ifdef NONET
return false;
#else
if (numbans == MAXBANS)
return false;
M_Memcpy(&banned[numbans], &clientaddress[node], sizeof (mysockaddr_t));
if (banned[numbans].any.sa_family == AF_INET)
{
banned[numbans].ip4.sin_port = 0;
bannedmask[numbans] = 32;
}
#ifdef HAVE_IPV6
else if (banned[numbans].any.sa_family == AF_INET6)
{
banned[numbans].ip6.sin6_port = 0;
bannedmask[numbans] = 128;
}
#endif
numbans++;
return true;
#endif
}
static boolean SOCK_SetBanAddress(const char *address, const char *mask)
{
#ifdef NONET
(void)address;
(void)mask;
return false;
#else
struct my_addrinfo *ai, *runp, hints;
int gaie;
if (numbans == MAXBANS || !address)
return false;
memset(&hints, 0x00, sizeof(hints));
hints.ai_flags = 0;
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_protocol = IPPROTO_UDP;
gaie = I_getaddrinfo(address, "0", &hints, &ai);
if (gaie != 0)
return false;
runp = ai;
while(runp != NULL && numbans != MAXBANS)
{
memcpy(&banned[numbans], runp->ai_addr, runp->ai_addrlen);
if (mask)
bannedmask[numbans] = (UINT8)atoi(mask);
#ifdef HAVE_IPV6
else if (runp->ai_family == AF_INET6)
bannedmask[numbans] = 128;
#endif
else
bannedmask[numbans] = 32;
if (bannedmask[numbans] > 32 && runp->ai_family == AF_INET)
bannedmask[numbans] = 32;
#ifdef HAVE_IPV6
else if (bannedmask[numbans] > 128 && runp->ai_family == AF_INET6)
bannedmask[numbans] = 128;
#endif
numbans++;
runp = runp->ai_next;
}
I_freeaddrinfo(ai);
return true;
#endif
}
static void SOCK_ClearBans(void)
{
numbans = 0;
}
boolean I_InitTcpNetwork(void)
{
char serverhostname[255];
boolean ret = false;
// initilize the OS's TCP/IP stack
if (!I_InitTcpDriver())
return false;
if (M_CheckParm("-udpport"))
{
if (M_IsNextParm())
strcpy(port_name, M_GetNextParm());
else
strcpy(port_name, "0");
}
current_port = (UINT16)atoi(port_name);
// parse network game options,
if (M_CheckParm("-server") || dedicated)
{
server = true;
// If a number of clients (i.e. nodes) is specified, the server will wait for the clients
// to connect before starting.
// If no number is specified here, the server starts with 1 client, and others can join
// in-game.
// Since Boris has implemented join in-game, there is no actual need for specifying a
// particular number here.
// FIXME: for dedicated server, numnodes needs to be set to 0 upon start
if (dedicated)
doomcom->numnodes = 0;
/* else if (M_IsNextParm())
doomcom->numnodes = (INT16)atoi(M_GetNextParm());*/
else
doomcom->numnodes = 1;
if (doomcom->numnodes < 0)
doomcom->numnodes = 0;
if (doomcom->numnodes > MAXNETNODES)
doomcom->numnodes = MAXNETNODES;
// server
servernode = 0;
// FIXME:
// ??? and now ?
// server on a big modem ??? 4*isdn
net_bandwidth = 16000;
hardware_MAXPACKETLENGTH = INETPACKETLENGTH;
ret = true;
}
else if (M_CheckParm("-connect"))
{
if (M_IsNextParm())
strcpy(serverhostname, M_GetNextParm());
else
serverhostname[0] = 0; // assuming server in the LAN, use broadcast to detect it
// server address only in ip
if (serverhostname[0])
{
COM_BufAddText("connect \"");
COM_BufAddText(serverhostname);
COM_BufAddText("\"\n");
// probably modem
hardware_MAXPACKETLENGTH = INETPACKETLENGTH;
}
else
{
// so we're on a LAN
COM_BufAddText("connect any\n");
net_bandwidth = 800000;
hardware_MAXPACKETLENGTH = MAXPACKETLENGTH;
}
}
I_NetOpenSocket = SOCK_OpenSocket;
I_Ban = SOCK_Ban;
I_ClearBans = SOCK_ClearBans;
I_GetNodeAddress = SOCK_GetNodeAddress;
I_GetBanAddress = SOCK_GetBanAddress;
I_GetBanMask = SOCK_GetBanMask;
I_SetBanAddress = SOCK_SetBanAddress;
bannednode = SOCK_bannednode;
return ret;
}
#include "i_addrinfo.c"
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