ref: cd8c8d416b4245458460cfe8e3c00bcb69c3c45b
dir: /u/net_wins.c/
/*
Copyright (C) 1996-1997 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// net_wins.c
#include "quakedef.h"
#include "winquake.h"
extern cvar_t hostname;
#define MAXHOSTNAMELEN 256
static int net_acceptsocket = -1; // socket for fielding new connections
static int net_controlsocket;
static int net_broadcastsocket = 0;
static struct qsockaddr broadcastaddr;
static unsigned long myAddr;
qboolean winsock_lib_initialized;
int (PASCAL FAR *pWSAStartup)(WORD wVersionRequired, LPWSADATA lpWSAData);
int (PASCAL FAR *pWSACleanup)(void);
int (PASCAL FAR *pWSAGetLastError)(void);
SOCKET (PASCAL FAR *psocket)(int af, int type, int protocol);
int (PASCAL FAR *pioctlsocket)(SOCKET s, long cmd, u_long FAR *argp);
int (PASCAL FAR *psetsockopt)(SOCKET s, int level, int optname,
const char FAR * optval, int optlen);
int (PASCAL FAR *precvfrom)(SOCKET s, char FAR * buf, int len, int flags,
struct sockaddr FAR *from, int FAR * fromlen);
int (PASCAL FAR *psendto)(SOCKET s, const char FAR * buf, int len, int flags,
const struct sockaddr FAR *to, int tolen);
int (PASCAL FAR *pclosesocket)(SOCKET s);
int (PASCAL FAR *pgethostname)(char FAR * name, int namelen);
struct hostent FAR * (PASCAL FAR *pgethostbyname)(const char FAR * name);
struct hostent FAR * (PASCAL FAR *pgethostbyaddr)(const char FAR * addr,
int len, int type);
int (PASCAL FAR *pgetsockname)(SOCKET s, struct sockaddr FAR *name,
int FAR * namelen);
#include "net_wins.h"
int winsock_initialized = 0;
WSADATA winsockdata;
//=============================================================================
static double blocktime;
BOOL PASCAL FAR BlockingHook(void)
{
MSG msg;
BOOL ret;
if ((Sys_FloatTime() - blocktime) > 2.0)
{
WSACancelBlockingCall();
return FALSE;
}
/* get the next message, if any */
ret = (BOOL) PeekMessage(&msg, NULL, 0, 0, PM_REMOVE);
/* if we got one, process it */
if (ret) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
/* TRUE if we got a message */
return ret;
}
void WINS_GetLocalAddress()
{
struct hostent *local = NULL;
char buff[MAXHOSTNAMELEN];
unsigned long addr;
if (myAddr != INADDR_ANY)
return;
if (pgethostname(buff, MAXHOSTNAMELEN) == SOCKET_ERROR)
return;
blocktime = Sys_FloatTime();
WSASetBlockingHook(BlockingHook);
local = pgethostbyname(buff);
WSAUnhookBlockingHook();
if (local == NULL)
return;
myAddr = *(int *)local->h_addr_list[0];
addr = ntohl(myAddr);
sprintf(my_tcpip_address, "%d.%d.%d.%d", (addr >> 24) & 0xff, (addr >> 16) & 0xff, (addr >> 8) & 0xff, addr & 0xff);
}
int WINS_Init (void)
{
int i;
char buff[MAXHOSTNAMELEN];
char *p;
int r;
WORD wVersionRequested;
HINSTANCE hInst;
// initialize the Winsock function vectors (we do this instead of statically linking
// so we can run on Win 3.1, where there isn't necessarily Winsock)
hInst = LoadLibrary("wsock32.dll");
if (hInst == NULL)
{
Con_SafePrintf ("Failed to load winsock.dll\n");
winsock_lib_initialized = false;
return -1;
}
winsock_lib_initialized = true;
pWSAStartup = (void *)GetProcAddress(hInst, "WSAStartup");
pWSACleanup = (void *)GetProcAddress(hInst, "WSACleanup");
pWSAGetLastError = (void *)GetProcAddress(hInst, "WSAGetLastError");
psocket = (void *)GetProcAddress(hInst, "socket");
pioctlsocket = (void *)GetProcAddress(hInst, "ioctlsocket");
psetsockopt = (void *)GetProcAddress(hInst, "setsockopt");
precvfrom = (void *)GetProcAddress(hInst, "recvfrom");
psendto = (void *)GetProcAddress(hInst, "sendto");
pclosesocket = (void *)GetProcAddress(hInst, "closesocket");
pgethostname = (void *)GetProcAddress(hInst, "gethostname");
pgethostbyname = (void *)GetProcAddress(hInst, "gethostbyname");
pgethostbyaddr = (void *)GetProcAddress(hInst, "gethostbyaddr");
pgetsockname = (void *)GetProcAddress(hInst, "getsockname");
if (!pWSAStartup || !pWSACleanup || !pWSAGetLastError ||
!psocket || !pioctlsocket || !psetsockopt ||
!precvfrom || !psendto || !pclosesocket ||
!pgethostname || !pgethostbyname || !pgethostbyaddr ||
!pgetsockname)
{
Con_SafePrintf ("Couldn't GetProcAddress from winsock.dll\n");
return -1;
}
if (COM_CheckParm ("-noudp"))
return -1;
if (winsock_initialized == 0)
{
wVersionRequested = MAKEWORD(1, 1);
r = pWSAStartup (MAKEWORD(1, 1), &winsockdata);
if (r)
{
Con_SafePrintf ("Winsock initialization failed.\n");
return -1;
}
}
winsock_initialized++;
// determine my name
if (pgethostname(buff, MAXHOSTNAMELEN) == SOCKET_ERROR)
{
Con_DPrintf ("Winsock TCP/IP Initialization failed.\n");
if (--winsock_initialized == 0)
pWSACleanup ();
return -1;
}
// if the quake hostname isn't set, set it to the machine name
if (Q_strcmp(hostname.string, "UNNAMED") == 0)
{
// see if it's a text IP address (well, close enough)
for (p = buff; *p; p++)
if ((*p < '0' || *p > '9') && *p != '.')
break;
// if it is a real name, strip off the domain; we only want the host
if (*p)
{
for (i = 0; i < 15; i++)
if (buff[i] == '.')
break;
buff[i] = 0;
}
Cvar_Set ("hostname", buff);
}
i = COM_CheckParm ("-ip");
if (i)
{
if (i < com_argc-1)
{
myAddr = inet_addr(com_argv[i+1]);
if (myAddr == INADDR_NONE)
Sys_Error ("%s is not a valid IP address", com_argv[i+1]);
strcpy(my_tcpip_address, com_argv[i+1]);
}
else
{
Sys_Error ("NET_Init: you must specify an IP address after -ip");
}
}
else
{
myAddr = INADDR_ANY;
strcpy(my_tcpip_address, "INADDR_ANY");
}
if ((net_controlsocket = WINS_OpenSocket (0)) == -1)
{
Con_Printf("WINS_Init: Unable to open control socket\n");
if (--winsock_initialized == 0)
pWSACleanup ();
return -1;
}
((struct sockaddr_in *)&broadcastaddr)->sin_family = AF_INET;
((struct sockaddr_in *)&broadcastaddr)->sin_addr.s_addr = INADDR_BROADCAST;
((struct sockaddr_in *)&broadcastaddr)->sin_port = htons((unsigned short)net_hostport);
Con_Printf("Winsock TCP/IP Initialized\n");
tcpipAvailable = true;
return net_controlsocket;
}
//=============================================================================
void WINS_Shutdown (void)
{
WINS_Listen (false);
WINS_CloseSocket (net_controlsocket);
if (--winsock_initialized == 0)
pWSACleanup ();
}
//=============================================================================
void WINS_Listen (qboolean state)
{
// enable listening
if (state)
{
if (net_acceptsocket != -1)
return;
WINS_GetLocalAddress();
if ((net_acceptsocket = WINS_OpenSocket (net_hostport)) == -1)
Sys_Error ("WINS_Listen: Unable to open accept socket\n");
return;
}
// disable listening
if (net_acceptsocket == -1)
return;
WINS_CloseSocket (net_acceptsocket);
net_acceptsocket = -1;
}
//=============================================================================
int WINS_OpenSocket (int port)
{
int newsocket;
struct sockaddr_in address;
u_long _true = 1;
if ((newsocket = psocket (PF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1)
return -1;
if (pioctlsocket (newsocket, FIONBIO, &_true) == -1)
goto ErrorReturn;
address.sin_family = AF_INET;
address.sin_addr.s_addr = myAddr;
address.sin_port = htons((unsigned short)port);
if( bind (newsocket, (void *)&address, sizeof(address)) == 0)
return newsocket;
Sys_Error ("Unable to bind to %s", WINS_AddrToString((struct qsockaddr *)&address));
ErrorReturn:
pclosesocket (newsocket);
return -1;
}
//=============================================================================
int WINS_CloseSocket (int socket)
{
if (socket == net_broadcastsocket)
net_broadcastsocket = 0;
return pclosesocket (socket);
}
//=============================================================================
/*
============
PartialIPAddress
this lets you type only as much of the net address as required, using
the local network components to fill in the rest
============
*/
static int PartialIPAddress (char *in, struct qsockaddr *hostaddr)
{
char buff[256];
char *b;
int addr;
int num;
int mask;
int run;
int port;
buff[0] = '.';
b = buff;
strcpy(buff+1, in);
if (buff[1] == '.')
b++;
addr = 0;
mask=-1;
while (*b == '.')
{
b++;
num = 0;
run = 0;
while (!( *b < '0' || *b > '9'))
{
num = num*10 + *b++ - '0';
if (++run > 3)
return -1;
}
if ((*b < '0' || *b > '9') && *b != '.' && *b != ':' && *b != 0)
return -1;
if (num < 0 || num > 255)
return -1;
mask<<=8;
addr = (addr<<8) + num;
}
if (*b++ == ':')
port = Q_atoi(b);
else
port = net_hostport;
hostaddr->sa_family = AF_INET;
((struct sockaddr_in *)hostaddr)->sin_port = htons((short)port);
((struct sockaddr_in *)hostaddr)->sin_addr.s_addr = (myAddr & htonl(mask)) | htonl(addr);
return 0;
}
//=============================================================================
int WINS_Connect (int socket, struct qsockaddr *addr)
{
return 0;
}
//=============================================================================
int WINS_CheckNewConnections (void)
{
char buf[4096];
if (net_acceptsocket == -1)
return -1;
if (precvfrom (net_acceptsocket, buf, sizeof(buf), MSG_PEEK, NULL, NULL) > 0)
{
return net_acceptsocket;
}
return -1;
}
//=============================================================================
int WINS_Read (int socket, byte *buf, int len, struct qsockaddr *addr)
{
int addrlen = sizeof (struct qsockaddr);
int ret;
ret = precvfrom (socket, buf, len, 0, (struct sockaddr *)addr, &addrlen);
if (ret == -1)
{
int errno = pWSAGetLastError();
if (errno == WSAEWOULDBLOCK || errno == WSAECONNREFUSED)
return 0;
}
return ret;
}
//=============================================================================
int WINS_MakeSocketBroadcastCapable (int socket)
{
int i = 1;
// make this socket broadcast capable
if (psetsockopt(socket, SOL_SOCKET, SO_BROADCAST, (char *)&i, sizeof(i)) < 0)
return -1;
net_broadcastsocket = socket;
return 0;
}
//=============================================================================
int WINS_Broadcast (int socket, byte *buf, int len)
{
int ret;
if (socket != net_broadcastsocket)
{
if (net_broadcastsocket != 0)
Sys_Error("Attempted to use multiple broadcasts sockets\n");
WINS_GetLocalAddress();
ret = WINS_MakeSocketBroadcastCapable (socket);
if (ret == -1)
{
Con_Printf("Unable to make socket broadcast capable\n");
return ret;
}
}
return WINS_Write (socket, buf, len, &broadcastaddr);
}
//=============================================================================
int WINS_Write (int socket, byte *buf, int len, struct qsockaddr *addr)
{
int ret;
ret = psendto (socket, buf, len, 0, (struct sockaddr *)addr, sizeof(struct qsockaddr));
if (ret == -1)
if (pWSAGetLastError() == WSAEWOULDBLOCK)
return 0;
return ret;
}
//=============================================================================
char *WINS_AddrToString (struct qsockaddr *addr)
{
static char buffer[22];
int haddr;
haddr = ntohl(((struct sockaddr_in *)addr)->sin_addr.s_addr);
sprintf(buffer, "%d.%d.%d.%d:%d", (haddr >> 24) & 0xff, (haddr >> 16) & 0xff, (haddr >> 8) & 0xff, haddr & 0xff, ntohs(((struct sockaddr_in *)addr)->sin_port));
return buffer;
}
//=============================================================================
int WINS_StringToAddr (char *string, struct qsockaddr *addr)
{
int ha1, ha2, ha3, ha4, hp;
int ipaddr;
sscanf(string, "%d.%d.%d.%d:%d", &ha1, &ha2, &ha3, &ha4, &hp);
ipaddr = (ha1 << 24) | (ha2 << 16) | (ha3 << 8) | ha4;
addr->sa_family = AF_INET;
((struct sockaddr_in *)addr)->sin_addr.s_addr = htonl(ipaddr);
((struct sockaddr_in *)addr)->sin_port = htons((unsigned short)hp);
return 0;
}
//=============================================================================
int WINS_GetSocketAddr (int socket, struct qsockaddr *addr)
{
int addrlen = sizeof(struct qsockaddr);
unsigned int a;
Q_memset(addr, 0, sizeof(struct qsockaddr));
pgetsockname(socket, (struct sockaddr *)addr, &addrlen);
a = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
if (a == 0 || a == inet_addr("127.0.0.1"))
((struct sockaddr_in *)addr)->sin_addr.s_addr = myAddr;
return 0;
}
//=============================================================================
int WINS_GetNameFromAddr (struct qsockaddr *addr, char *name)
{
struct hostent *hostentry;
hostentry = pgethostbyaddr ((char *)&((struct sockaddr_in *)addr)->sin_addr, sizeof(struct in_addr), AF_INET);
if (hostentry)
{
Q_strncpy (name, (char *)hostentry->h_name, NET_NAMELEN - 1);
return 0;
}
Q_strcpy (name, WINS_AddrToString (addr));
return 0;
}
//=============================================================================
int WINS_GetAddrFromName(char *name, struct qsockaddr *addr)
{
struct hostent *hostentry;
if (name[0] >= '0' && name[0] <= '9')
return PartialIPAddress (name, addr);
hostentry = pgethostbyname (name);
if (!hostentry)
return -1;
addr->sa_family = AF_INET;
((struct sockaddr_in *)addr)->sin_port = htons((unsigned short)net_hostport);
((struct sockaddr_in *)addr)->sin_addr.s_addr = *(int *)hostentry->h_addr_list[0];
return 0;
}
//=============================================================================
int WINS_AddrCompare (struct qsockaddr *addr1, struct qsockaddr *addr2)
{
if (addr1->sa_family != addr2->sa_family)
return -1;
if (((struct sockaddr_in *)addr1)->sin_addr.s_addr != ((struct sockaddr_in *)addr2)->sin_addr.s_addr)
return -1;
if (((struct sockaddr_in *)addr1)->sin_port != ((struct sockaddr_in *)addr2)->sin_port)
return 1;
return 0;
}
//=============================================================================
int WINS_GetSocketPort (struct qsockaddr *addr)
{
return ntohs(((struct sockaddr_in *)addr)->sin_port);
}
int WINS_SetSocketPort (struct qsockaddr *addr, int port)
{
((struct sockaddr_in *)addr)->sin_port = htons((unsigned short)port);
return 0;
}
//=============================================================================