mirror of
https://git.code.sf.net/p/quake/newtree
synced 2024-12-11 21:00:50 +00:00
412 lines
8.5 KiB
C
412 lines
8.5 KiB
C
/*
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net_udp.c
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(description)
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Copyright (C) 1996-1997 Id Software, Inc.
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Copyright (C) 2000 Marcus Sundberg [mackan@stacken.kth.se]
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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:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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$Id$
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "sys.h"
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#include "net.h"
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#include "qargs.h"
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#include "console.h"
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <errno.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <sys/types.h>
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#ifdef HAVE_SYS_PARAM_H
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# include <sys/param.h>
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#endif
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#ifdef HAVE_SYS_IOCTL_H
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# include <sys/ioctl.h>
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#endif
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#ifdef HAVE_SYS_SOCKET_H
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# include <sys/socket.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#ifdef HAVE_NETDB_H
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# include <netdb.h>
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#endif
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#ifdef HAVE_ARPA_INET_H
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# include <arpa/inet.h>
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#endif
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#ifdef HAVE_SYS_FILIO_H
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# include <sys/filio.h>
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#endif
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#ifdef _WIN32
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# include <winquake.h>
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# undef EWOULDBLOCK
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# define EWOULDBLOCK WSAEWOULDBLOCK
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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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#ifndef MAXHOSTNAMELEN
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# define MAXHOSTNAMELEN 512
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#endif
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#ifndef HAVE_SOCKLEN_T
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# ifdef HAVE_SIZE
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typedef size_t socklen_t;
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# else
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typedef unsigned int socklen_t;
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# endif
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#endif
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netadr_t net_local_adr;
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netadr_t net_from;
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sizebuf_t net_message;
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int net_socket;
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#define MAX_UDP_PACKET (MAX_MSGLEN*2)
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byte net_message_buffer[MAX_UDP_PACKET];
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#ifdef _WIN32
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extern qboolean is_server;
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WSADATA winsockdata;
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#endif
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//=============================================================================
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void NetadrToSockadr (netadr_t *a, struct sockaddr_in *s)
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{
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memset (s, 0, sizeof(*s));
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s->sin_family = AF_INET;
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*(int *)&s->sin_addr = *(int *)&a->ip;
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s->sin_port = a->port;
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}
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void SockadrToNetadr (struct sockaddr_in *s, netadr_t *a)
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{
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*(int *)&a->ip = *(int *)&s->sin_addr;
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a->port = s->sin_port;
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}
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qboolean NET_CompareBaseAdr (netadr_t a, netadr_t b)
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{
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if (a.ip[0] == b.ip[0] && a.ip[1] == b.ip[1] && a.ip[2] == b.ip[2] && a.ip[3] == b.ip[3])
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return true;
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return false;
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}
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qboolean NET_CompareAdr (netadr_t a, netadr_t b)
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{
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if (a.ip[0] == b.ip[0] && a.ip[1] == b.ip[1] && a.ip[2] == b.ip[2] && a.ip[3] == b.ip[3] && a.port == b.port)
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return true;
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return false;
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}
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char *NET_AdrToString (netadr_t a)
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{
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static char s[64];
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sprintf (s, "%i.%i.%i.%i:%i", a.ip[0], a.ip[1], a.ip[2], a.ip[3], ntohs(a.port));
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return s;
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}
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char *NET_BaseAdrToString (netadr_t a)
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{
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static char s[64];
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sprintf (s, "%i.%i.%i.%i", a.ip[0], a.ip[1], a.ip[2], a.ip[3]);
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return s;
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}
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/*
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=============
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NET_StringToAdr
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idnewt
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idnewt:28000
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192.246.40.70
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192.246.40.70:28000
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=============
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*/
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qboolean NET_StringToAdr (char *s, netadr_t *a)
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{
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struct hostent *h;
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struct sockaddr_in sadr;
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char *colon;
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char copy[128];
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memset (&sadr, 0, sizeof(sadr));
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sadr.sin_family = AF_INET;
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sadr.sin_port = 0;
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strcpy (copy, s);
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// strip off a trailing :port if present
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for (colon = copy ; *colon ; colon++)
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if (*colon == ':')
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{
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*colon = 0;
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sadr.sin_port = htons((unsigned short)atoi(colon+1));
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}
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if (copy[0] >= '0' && copy[0] <= '9')
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{
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*(int *)&sadr.sin_addr = inet_addr(copy);
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}
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else
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{
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if (! (h = gethostbyname(copy)) )
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return 0;
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*(int *)&sadr.sin_addr = *(int *)h->h_addr_list[0];
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}
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SockadrToNetadr (&sadr, a);
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return true;
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}
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// Returns true if we can't bind the address locally--in other words,
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// the IP is NOT one of our interfaces.
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qboolean NET_IsClientLegal(netadr_t *adr)
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{
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#if 0
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struct sockaddr_in sadr;
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int newsocket;
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if (adr->ip[0] == 127)
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return false; // no local connections period
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NetadrToSockadr (adr, &sadr);
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if ((newsocket = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1)
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Sys_Error ("NET_IsClientLegal: socket:", strerror(errno));
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sadr.sin_port = 0;
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if( bind (newsocket, (void *)&sadr, sizeof(sadr)) == -1)
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{
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// It is not a local address
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close(newsocket);
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return true;
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}
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close(newsocket);
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return false;
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#else
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return true;
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#endif
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}
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//=============================================================================
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qboolean NET_GetPacket (void)
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{
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int ret;
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struct sockaddr_in from;
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socklen_t fromlen;
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fromlen = sizeof(from);
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ret = recvfrom(net_socket, (void*)net_message_buffer, sizeof(net_message_buffer), 0, (struct sockaddr *)&from, &fromlen);
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SockadrToNetadr (&from, &net_from);
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SockadrToNetadr(&from, &net_from);
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if (ret == -1) {
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#ifdef _WIN32
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int err = WSAGetLastError();
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if (err == WSAEMSGSIZE) {
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Con_Printf ("Warning: Oversize packet from %s\n",
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NET_AdrToString (net_from));
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return false;
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}
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#else /* _WIN32 */
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int err = errno;
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if (err == ECONNREFUSED) return false;
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#endif /* _WIN32 */
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if (err == EWOULDBLOCK) return false;
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Sys_Printf ("NET_GetPacket: %s\n", strerror(err));
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return false;
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}
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net_message.cursize = ret;
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if (ret == sizeof(net_message_buffer)) {
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Con_Printf ("Oversize packet from %s\n",
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NET_AdrToString (net_from));
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return false;
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}
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return ret;
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}
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//=============================================================================
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void NET_SendPacket (int length, void *data, netadr_t to)
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{
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int ret;
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struct sockaddr_in addr;
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NetadrToSockadr (&to, &addr);
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ret = sendto (net_socket, data, length, 0, (struct sockaddr *)&addr, sizeof(addr) );
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if (ret == -1) {
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#ifdef _WIN32
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int err = WSAGetLastError();
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if (err == WSAEADDRNOTAVAIL) {
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if (is_server) Con_DPrintf("NET_SendPacket Warning: %i\n", err);
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else Con_Printf ("NET_SendPacket ERROR: %i\n", err);
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}
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#else /* _WIN32 */
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int err = errno;
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if (err == ECONNREFUSED) return;
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#endif /* _WIN32 */
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if (err == EWOULDBLOCK) return;
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Sys_Printf ("NET_SendPacket: %s\n", strerror(errno));
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}
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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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#ifdef _WIN32
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#define ioctl ioctlsocket
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unsigned long _true = true;
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#else
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int _true = 1;
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#endif
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int i;
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if ((newsocket = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1)
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Sys_Error ("UDP_OpenSocket: socket:%s", strerror(errno));
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if (ioctl (newsocket, FIONBIO, &_true) == -1)
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Sys_Error ("UDP_OpenSocket: ioctl FIONBIO:%s", strerror(errno));
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address.sin_family = AF_INET;
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//ZOID -- check for interface binding option
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if ((i = COM_CheckParm("-ip")) != 0 && i < com_argc) {
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address.sin_addr.s_addr = inet_addr(com_argv[i+1]);
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Con_Printf("Binding to IP Interface Address of %s\n",
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inet_ntoa(address.sin_addr));
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} else
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address.sin_addr.s_addr = INADDR_ANY;
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if (port == PORT_ANY)
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address.sin_port = 0;
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else
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address.sin_port = htons((short)port);
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if( bind (newsocket, (void *)&address, sizeof(address)) == -1)
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Sys_Error ("UDP_OpenSocket: bind: %s", strerror(errno));
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return newsocket;
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}
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void NET_GetLocalAddress (void)
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{
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char buff[MAXHOSTNAMELEN];
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struct sockaddr_in address;
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socklen_t namelen;
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gethostname(buff, MAXHOSTNAMELEN);
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buff[MAXHOSTNAMELEN-1] = 0;
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NET_StringToAdr (buff, &net_local_adr);
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namelen = sizeof(address);
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if (getsockname (net_socket, (struct sockaddr *)&address, &namelen) == -1)
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Sys_Error ("NET_Init: getsockname: %s", strerror(errno));
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net_local_adr.port = address.sin_port;
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Con_Printf("IP address %s\n", NET_AdrToString (net_local_adr) );
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}
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/*
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====================
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NET_Init
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====================
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*/
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void NET_Init (int port)
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{
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#ifdef _WIN32
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WORD wVersionRequested;
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int r;
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wVersionRequested = MAKEWORD(1, 1);
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r = WSAStartup(MAKEWORD(1, 1), &winsockdata);
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if (r)
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Sys_Error ("Winsock initialization failed.");
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#endif /* _WIN32 */
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//
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// open the single socket to be used for all communications
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//
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net_socket = UDP_OpenSocket (port);
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//
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// init the message buffer
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//
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net_message.maxsize = sizeof(net_message_buffer);
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net_message.data = net_message_buffer;
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//
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// determine my name & address
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//
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NET_GetLocalAddress ();
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Con_Printf("UDP Initialized\n");
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}
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/*
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====================
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NET_Shutdown
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====================
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*/
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void NET_Shutdown (void)
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{
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#ifdef _WIN32
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closesocket(net_socket);
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WSACleanup();
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#else
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close (net_socket);
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#endif
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}
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