forked from KolibriOS/kolibrios
416 lines
9.9 KiB
C
416 lines
9.9 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_udp.c
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#include "quakedef.h"
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <errno.h>
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#ifdef __sun__
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#include <sys/filio.h>
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#endif
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#ifdef NeXT
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#include <libc.h>
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#endif
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extern int gethostname (char *, int);
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extern int close (int);
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extern cvar_t hostname;
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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 struct qsockaddr broadcastaddr;
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static unsigned long myAddr;
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#include "net_udp.h"
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//=============================================================================
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int UDP_Init (void)
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{
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struct hostent *local;
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char buff[MAXHOSTNAMELEN];
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struct qsockaddr addr;
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char *colon;
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if (COM_CheckParm ("-noudp"))
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return -1;
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// determine my name & address
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gethostname(buff, MAXHOSTNAMELEN);
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local = gethostbyname(buff);
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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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buff[15] = 0;
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Cvar_Set ("hostname", buff);
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}
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if ((net_controlsocket = UDP_OpenSocket (0)) == -1)
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Sys_Error("UDP_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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UDP_GetSocketAddr (net_controlsocket, &addr);
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Q_strcpy(my_tcpip_address, UDP_AddrToString (&addr));
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colon = Q_strrchr (my_tcpip_address, ':');
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if (colon)
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*colon = 0;
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Con_Printf("UDP 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 UDP_Shutdown (void)
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{
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UDP_Listen (false);
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UDP_CloseSocket (net_controlsocket);
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}
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//=============================================================================
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void UDP_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 = UDP_OpenSocket (net_hostport)) == -1)
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Sys_Error ("UDP_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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UDP_CloseSocket (net_acceptsocket);
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net_acceptsocket = -1;
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}
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//=============================================================================
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int UDP_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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qboolean _true = true;
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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 0
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if (ioctl (newsocket, FIONBIO, (char *)&_true) == -1)
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goto ErrorReturn;
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#endif
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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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close (newsocket);
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return -1;
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}
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//=============================================================================
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int UDP_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 close (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 UDP_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 UDP_CheckNewConnections (void)
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{
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unsigned long available;
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if (net_acceptsocket == -1)
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return -1;
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if (ioctl (net_acceptsocket, FIONREAD, &available) == -1)
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Sys_Error ("UDP: ioctlsocket (FIONREAD) failed\n");
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if (available)
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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 UDP_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 && (errno == EWOULDBLOCK || errno == ECONNREFUSED))
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return 0;
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return ret;
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}
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//=============================================================================
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int UDP_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 UDP_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 = UDP_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 UDP_Write (socket, buf, len, &broadcastaddr);
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}
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//=============================================================================
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int UDP_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 && errno == EWOULDBLOCK)
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return 0;
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return ret;
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}
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//=============================================================================
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char *UDP_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 UDP_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 UDP_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 UDP_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, UDP_AddrToString (addr));
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return 0;
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}
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//=============================================================================
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int UDP_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 UDP_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 UDP_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 UDP_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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