443 lines
11 KiB
C
443 lines
11 KiB
C
/*
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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// net_mpath.c
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#include <dpmi.h>
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#include "quakedef.h"
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#include "mpdosock.h"
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short flat_selector;
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int WSAGetLastError(void);
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void sockets_flush(void);
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extern cvar_t hostname;
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#define MAXHOSTNAMELEN 256
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static int net_acceptsocket = -1; // socket for fielding new connections
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static int net_controlsocket;
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static int net_broadcastsocket = 0;
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//static qboolean ifbcastinit = false;
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static struct qsockaddr broadcastaddr;
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static unsigned long myAddr;
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#include "net_mp.h"
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//=============================================================================
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int MPATH_Init (void)
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{
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int i;
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struct hostent *local = NULL;
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char buff[MAXHOSTNAMELEN];
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struct qsockaddr addr;
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char *p;
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if (COM_CheckParm ("-mpath") == 0)
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return -1;
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flat_selector = __dpmi_allocate_ldt_descriptors(1);
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if (flat_selector == -1) {
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Con_Printf("MPATH_Init: Can't get flat selector\n");
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return -1;
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}
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if (__dpmi_set_segment_base_address(flat_selector, 0) == -1) {
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Con_Printf("MPATH_Init: Can't seg flat base!\n");
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return -1;
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}
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if (__dpmi_set_segment_limit(flat_selector, 0xffffffff) == -1) {
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Con_Printf("MPATH_Init: Can't set segment limit\n");
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return -1;
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}
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// determine my name & address
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if (gethostname(buff, MAXHOSTNAMELEN) == 0)
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local = gethostbyname(buff);
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if (local)
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{
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myAddr = *(int *)local->h_addr_list[0];
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// if the quake hostname isn't set, set it to the machine name
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if (Q_strcmp(hostname.string, "UNNAMED") == 0)
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{
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// see if it's a text IP address (well, close enough)
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for (p = buff; *p; p++)
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if ((*p < '0' || *p > '9') && *p != '.')
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break;
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// if it is a real name, strip off the domain; we only want the host
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if (*p)
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{
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for (i = 0; i < 15; i++)
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if (buff[i] == '.')
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break;
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buff[i] = 0;
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}
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Cvar_Set ("hostname", buff);
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}
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}
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if ((net_controlsocket = MPATH_OpenSocket (0)) == -1)
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Sys_Error("MPATH_Init: Unable to open control socket\n");
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((struct sockaddr_in *)&broadcastaddr)->sin_family = AF_INET;
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((struct sockaddr_in *)&broadcastaddr)->sin_addr.s_addr = INADDR_BROADCAST;
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((struct sockaddr_in *)&broadcastaddr)->sin_port = htons(net_hostport);
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MPATH_GetSocketAddr (net_controlsocket, &addr);
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Q_strcpy(my_tcpip_address, MPATH_AddrToString (&addr));
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p = Q_strrchr (my_tcpip_address, ':');
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if (p)
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*p = 0;
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Con_Printf("MPath Initialized\n");
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tcpipAvailable = true;
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return net_controlsocket;
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}
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//=============================================================================
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void MPATH_Shutdown (void)
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{
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MPATH_Listen (false);
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MPATH_CloseSocket (net_controlsocket);
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}
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//=============================================================================
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void MPATH_Listen (qboolean state)
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{
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// enable listening
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if (state)
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{
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if (net_acceptsocket != -1)
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return;
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if ((net_acceptsocket = MPATH_OpenSocket (net_hostport)) == -1)
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Sys_Error ("MPATH_Listen: Unable to open accept socket\n");
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return;
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}
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// disable listening
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if (net_acceptsocket == -1)
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return;
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MPATH_CloseSocket (net_acceptsocket);
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net_acceptsocket = -1;
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}
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//=============================================================================
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int MPATH_OpenSocket (int port)
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{
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int newsocket;
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struct sockaddr_in address;
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u_long _true = 1;
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if ((newsocket = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1)
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return -1;
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if (ioctlsocket (newsocket, FIONBIO, &_true) == -1)
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goto ErrorReturn;
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address.sin_family = AF_INET;
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address.sin_addr.s_addr = INADDR_ANY;
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address.sin_port = htons(port);
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if( bind (newsocket, (void *)&address, sizeof(address)) == -1)
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goto ErrorReturn;
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return newsocket;
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ErrorReturn:
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closesocket (newsocket);
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return -1;
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}
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//=============================================================================
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int MPATH_CloseSocket (int socket)
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{
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if (socket == net_broadcastsocket)
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net_broadcastsocket = 0;
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return closesocket (socket);
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}
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//=============================================================================
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/*
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============
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PartialIPAddress
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this lets you type only as much of the net address as required, using
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the local network components to fill in the rest
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============
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*/
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static int PartialIPAddress (char *in, struct qsockaddr *hostaddr)
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{
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char buff[256];
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char *b;
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int addr;
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int num;
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int mask;
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int run;
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int port;
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buff[0] = '.';
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b = buff;
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strcpy(buff+1, in);
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if (buff[1] == '.')
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b++;
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addr = 0;
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mask=-1;
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while (*b == '.')
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{
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b++;
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num = 0;
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run = 0;
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while (!( *b < '0' || *b > '9'))
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{
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num = num*10 + *b++ - '0';
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if (++run > 3)
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return -1;
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}
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if ((*b < '0' || *b > '9') && *b != '.' && *b != ':' && *b != 0)
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return -1;
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if (num < 0 || num > 255)
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return -1;
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mask<<=8;
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addr = (addr<<8) + num;
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}
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if (*b++ == ':')
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port = Q_atoi(b);
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else
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port = net_hostport;
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hostaddr->sa_family = AF_INET;
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((struct sockaddr_in *)hostaddr)->sin_port = htons((short)port);
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((struct sockaddr_in *)hostaddr)->sin_addr.s_addr = (myAddr & htonl(mask)) | htonl(addr);
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return 0;
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}
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//=============================================================================
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int MPATH_Connect (int socket, struct qsockaddr *addr)
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{
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return 0;
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}
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//=============================================================================
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int MPATH_CheckNewConnections (void)
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{
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char buf[4];
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if (net_acceptsocket == -1)
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return -1;
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if (recvfrom (net_acceptsocket, buf, 4, MSG_PEEK, NULL, NULL) > 0)
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return net_acceptsocket;
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return -1;
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}
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//=============================================================================
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int MPATH_Read (int socket, byte *buf, int len, struct qsockaddr *addr)
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{
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int addrlen = sizeof (struct qsockaddr);
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int ret;
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ret = recvfrom (socket, buf, len, 0, (struct sockaddr *)addr, &addrlen);
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if (ret == -1)
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{
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int errno = WSAGetLastError();
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if (errno == WSAEWOULDBLOCK || errno == WSAECONNREFUSED)
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return 0;
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}
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return ret;
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}
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//=============================================================================
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int MPATH_MakeSocketBroadcastCapable (int socket)
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{
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int i = 1;
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// make this socket broadcast capable
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if (setsockopt(socket, SOL_SOCKET, SO_BROADCAST, (char *)&i, sizeof(i)) < 0)
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return -1;
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net_broadcastsocket = socket;
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return 0;
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}
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//=============================================================================
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int MPATH_Broadcast (int socket, byte *buf, int len)
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{
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int ret;
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if (socket != net_broadcastsocket)
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{
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if (net_broadcastsocket != 0)
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Sys_Error("Attempted to use multiple broadcasts sockets\n");
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ret = MPATH_MakeSocketBroadcastCapable (socket);
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if (ret == -1)
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{
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Con_Printf("Unable to make socket broadcast capable\n");
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return ret;
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}
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}
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return MPATH_Write (socket, buf, len, &broadcastaddr);
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}
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//=============================================================================
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int MPATH_Write (int socket, byte *buf, int len, struct qsockaddr *addr)
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{
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int ret;
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ret = sendto (socket, buf, len, 0, (struct sockaddr *)addr, sizeof(struct qsockaddr));
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if (ret == -1)
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if (WSAGetLastError() == WSAEWOULDBLOCK)
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return 0;
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sockets_flush();
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return ret;
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}
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//=============================================================================
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char *MPATH_AddrToString (struct qsockaddr *addr)
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{
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static char buffer[22];
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int haddr;
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haddr = ntohl(((struct sockaddr_in *)addr)->sin_addr.s_addr);
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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));
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return buffer;
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}
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//=============================================================================
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int MPATH_StringToAddr (char *string, struct qsockaddr *addr)
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{
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int ha1, ha2, ha3, ha4, hp;
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int ipaddr;
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sscanf(string, "%d.%d.%d.%d:%d", &ha1, &ha2, &ha3, &ha4, &hp);
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ipaddr = (ha1 << 24) | (ha2 << 16) | (ha3 << 8) | ha4;
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addr->sa_family = AF_INET;
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((struct sockaddr_in *)addr)->sin_addr.s_addr = htonl(ipaddr);
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((struct sockaddr_in *)addr)->sin_port = htons(hp);
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return 0;
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}
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//=============================================================================
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int MPATH_GetSocketAddr (int socket, struct qsockaddr *addr)
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{
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int addrlen = sizeof(struct qsockaddr);
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unsigned int a;
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Q_memset(addr, 0, sizeof(struct qsockaddr));
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getsockname(socket, (struct sockaddr *)addr, &addrlen);
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a = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
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if (a == 0 || a == inet_addr("127.0.0.1"))
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((struct sockaddr_in *)addr)->sin_addr.s_addr = myAddr;
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return 0;
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}
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//=============================================================================
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int MPATH_GetNameFromAddr (struct qsockaddr *addr, char *name)
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{
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struct hostent *hostentry;
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hostentry = gethostbyaddr ((char *)&((struct sockaddr_in *)addr)->sin_addr, sizeof(struct in_addr), AF_INET);
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if (hostentry)
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{
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Q_strncpy (name, (char *)hostentry->h_name, NET_NAMELEN - 1);
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return 0;
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}
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Q_strcpy (name, MPATH_AddrToString (addr));
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return 0;
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}
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//=============================================================================
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int MPATH_GetAddrFromName(char *name, struct qsockaddr *addr)
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{
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struct hostent *hostentry;
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if (name[0] >= '0' && name[0] <= '9')
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return PartialIPAddress (name, addr);
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hostentry = gethostbyname (name);
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if (!hostentry)
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return -1;
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addr->sa_family = AF_INET;
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((struct sockaddr_in *)addr)->sin_port = htons(net_hostport);
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((struct sockaddr_in *)addr)->sin_addr.s_addr = *(int *)hostentry->h_addr_list[0];
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return 0;
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}
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//=============================================================================
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int MPATH_AddrCompare (struct qsockaddr *addr1, struct qsockaddr *addr2)
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{
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if (addr1->sa_family != addr2->sa_family)
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return -1;
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if (((struct sockaddr_in *)addr1)->sin_addr.s_addr != ((struct sockaddr_in *)addr2)->sin_addr.s_addr)
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return -1;
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if (((struct sockaddr_in *)addr1)->sin_port != ((struct sockaddr_in *)addr2)->sin_port)
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return 1;
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return 0;
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}
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//=============================================================================
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int MPATH_GetSocketPort (struct qsockaddr *addr)
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{
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return ntohs(((struct sockaddr_in *)addr)->sin_port);
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}
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int MPATH_SetSocketPort (struct qsockaddr *addr, int port)
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{
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((struct sockaddr_in *)addr)->sin_port = htons(port);
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return 0;
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}
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//=============================================================================
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