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quakeforge-old/qw_common/net_udp6.c

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/*
Copyright (C) 1996-1997 Id Software, Inc.
Portions Copyright (C) 1999,2000 Nelson Rush.
Portions Copyright (C) 2000 Marcus Sundberg [mackan@stacken.kth.se]
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_udp.c
#include "quakedef.h"
#include <stdio.h>
#include <errno.h>
/* Sun's model_t in sys/model.h conflicts w/ Quake's model_t */
#define model_t quakeforgemodel_t
#include <unistd.h>
#include <sys/types.h>
#ifdef HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#ifdef HAVE_NETDB_H
# include <netdb.h>
#endif
#ifdef HAVE_ARPA_INET_H
# include <arpa/inet.h>
#endif
#ifdef HAVE_SYS_FILIO_H
# include <sys/filio.h>
#endif
#undef model_t
#ifdef _WIN32
# include "winquake.h"
# undef EWOULDBLOCK
# define EWOULDBLOCK WSAEWOULDBLOCK
#endif
#ifdef NeXT
#include <libc.h>
#endif
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 512
#endif
netadr_t net_local_adr;
netadr_t net_from;
sizebuf_t net_message;
int net_socket;
#define MAX_UDP_PACKET (MAX_MSGLEN*2)
byte net_message_buffer[MAX_UDP_PACKET];
#ifdef _WIN32
WSADATA winsockdata;
#endif
//=============================================================================
void NetadrToSockadr (netadr_t *a, struct sockaddr_in6 *s)
{
memset (s, 0, sizeof(*s));
s->sin6_family = AF_INET6;
s->sin6_addr.in6_u.u6_addr32[0] = a->ip[0];
s->sin6_addr.in6_u.u6_addr32[1] = a->ip[1];
s->sin6_addr.in6_u.u6_addr32[2] = a->ip[2];
s->sin6_addr.in6_u.u6_addr32[3] = a->ip[3];
s->sin6_port = a->port;
}
void SockadrToNetadr (struct sockaddr_in6 *s, netadr_t *a)
{
a->ip[0] = s->sin6_addr.in6_u.u6_addr32[0];
a->ip[1] = s->sin6_addr.in6_u.u6_addr32[1];
a->ip[2] = s->sin6_addr.in6_u.u6_addr32[2];
a->ip[3] = s->sin6_addr.in6_u.u6_addr32[3];
a->port = s->sin6_port;
}
qboolean NET_CompareBaseAdr (netadr_t a, netadr_t b)
{
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])
return true;
return false;
}
qboolean NET_CompareAdr (netadr_t a, netadr_t b)
{
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)
return true;
return false;
}
char *NET_AdrToString (netadr_t a)
{
static char s[64];
char *base;
base=NET_BaseAdrToString(a);
sprintf(s,"[%s]:%d",base,ntohs(a.port));
return s;
}
char *NET_BaseAdrToString (netadr_t a)
{
static char s[64];
struct sockaddr_in6 sa;
int err;
NetadrToSockadr(&a,&sa);
if ((err=getnameinfo((struct sockaddr *) &sa,sizeof(sa),s,sizeof(s),NULL,0,NI_NUMERICHOST))) {
strcpy(s,"<invalid>");
}
return s;
}
/*
=============
NET_StringToAdr
idnewt
idnewt:28000
192.246.40.70
192.246.40.70:28000
=============
*/
qboolean NET_StringToAdr (char *s, netadr_t *a)
{
struct addrinfo hints;
struct addrinfo *resultp;
char *space;
char *ports=NULL;
char copy[128];
char *addrs;
int err;
struct sockaddr_storage ss;
struct sockaddr_in6 *ss6;
struct sockaddr_in *ss4;
memset(&hints,0,sizeof(hints));
hints.ai_socktype=SOCK_DGRAM;
hints.ai_family=PF_UNSPEC;
strcpy(copy,s);
addrs=space=copy;
if (*addrs=='[') {
addrs++;
for (; *space && *space!=']'; space++);
if (!*space) {
Con_Printf ("NET_StringToAdr: invalid IPv6 address %s\n",s);
return 0;
}
*space++='\0';
}
for (; *space; space++) {
if (*space==':')
{
*space='\0';
ports=space+1;
}
}
// Con_Printf ("NET_StringToAdr: addrs %s ports %s\n",addrs, ports);
if ((err=getaddrinfo(addrs,ports,&hints,&resultp)))
{
// Error
Con_Printf ("NET_StringToAdr: string %s:\n%s\n",s, gai_strerror(err));
return 0;
}
switch (resultp->ai_family) {
case AF_INET:
// convert to ipv6 addr
memset(&ss,0,sizeof(ss));
ss6=(struct sockaddr_in6 *) &ss;
ss4=(struct sockaddr_in *) resultp->ai_addr;
ss6->sin6_family=AF_INET6;
ss6->sin6_addr.in6_u.u6_addr32[0]=0;
ss6->sin6_addr.in6_u.u6_addr32[1]=0;
ss6->sin6_addr.in6_u.u6_addr32[2]=htonl(0xffff);
ss6->sin6_addr.in6_u.u6_addr32[3]=ss4->sin_addr.s_addr;
ss6->sin6_port=ss4->sin_port;
break;
case AF_INET6:
memcpy(&ss,resultp->ai_addr,sizeof(struct sockaddr_in6));
break;
default:
Con_Printf ("NET_StringToAdr: string %s:\nprotocol family %d not supported\n",s, resultp->ai_family);
return 0;
}
SockadrToNetadr ((struct sockaddr_in6 *) &ss, a);
return true;
}
// Returns true if we can't bind the address locally--in other words,
// the IP is NOT one of our interfaces.
qboolean NET_IsClientLegal(netadr_t *adr)
{
#if 0
struct sockaddr_in sadr;
int newsocket;
if (adr->ip[0] == 127)
return false; // no local connections period
NetadrToSockadr (adr, &sadr);
if ((newsocket = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1)
Sys_Error ("NET_IsClientLegal: socket: %s", strerror(errno));
sadr.sin_port = 0;
if( bind (newsocket, (void *)&sadr, sizeof(sadr)) == -1)
{
// It is not a local address
close(newsocket);
return true;
}
close(newsocket);
return false;
#else
return true;
#endif
}
//=============================================================================
qboolean NET_GetPacket (void)
{
int ret;
struct sockaddr_in6 from;
unsigned int fromlen;
fromlen = sizeof(from);
ret = recvfrom(net_socket, (void*)net_message_buffer, sizeof(net_message_buffer), 0, (struct sockaddr *)&from, &fromlen);
SockadrToNetadr (&from, &net_from);
if (ret == -1) {
#ifdef _WIN32
int err = WSAGetLastError();
if (err == WSAEMSGSIZE) {
Con_Printf ("Warning: Oversize packet from %s\n",
NET_AdrToString (net_from));
return false;
}
#else /* _WIN32 */
int err = errno;
if (err == ECONNREFUSED)
return false;
#endif /* _WIN32 */
if (err == EWOULDBLOCK)
return false;
Sys_Printf ("NET_GetPacket: %s\n", strerror(err));
return false;
}
net_message.cursize = ret;
if (ret == sizeof(net_message_buffer)) {
Con_Printf ("Oversize packet from %s\n",
NET_AdrToString (net_from));
return false;
}
return ret;
}
//=============================================================================
void NET_SendPacket (int length, void *data, netadr_t to)
{
int ret;
struct sockaddr_in6 addr;
NetadrToSockadr (&to, &addr);
ret = sendto (net_socket, data, length, 0, (struct sockaddr *)&addr, sizeof(addr) );
if (ret == -1) {
#ifdef _WIN32
int err = WSAGetLastError();
#ifndef SERVERONLY
if (err == WSAEADDRNOTAVAIL)
Con_DPrintf("NET_SendPacket Warning: %i\n", err);
#endif
#else /* _WIN32 */
int err = errno;
if (err == ECONNREFUSED)
return;
#endif /* _WIN32 */
if (err == EWOULDBLOCK)
return;
Sys_Printf ("NET_SendPacket: %s\n", strerror(err));
}
}
//=============================================================================
int UDP_OpenSocket (int port)
{
int err;
int newsocket;
struct sockaddr_in6 address;
struct sockaddr_in *ss4;
struct addrinfo hints;
struct addrinfo *resultp;
char addrbuf[128];
#ifdef _WIN32
#define ioctl ioctlsocket
unsigned long _true = true;
#else
int _true = 1;
#endif
int i;
if ((newsocket = socket (PF_INET6, SOCK_DGRAM, IPPROTO_UDP)) == -1)
Sys_Error ("UDP_OpenSocket: socket: %s", strerror(errno));
if (ioctl (newsocket, FIONBIO, &_true) == -1)
Sys_Error ("UDP_OpenSocket: ioctl FIONBIO: %s", strerror(errno));
memset(&address,0,sizeof(address));
address.sin6_family = AF_INET6;
//ZOID -- check for interface binding option
if ((i = COM_CheckParm("-ip")) != 0 && i < com_argc) {
memset(&hints,0,sizeof(hints));
hints.ai_socktype=SOCK_DGRAM;
hints.ai_family=PF_UNSPEC;
if ((err=getaddrinfo(com_argv[i+1],NULL,&hints,&resultp)))
{
Sys_Error ("UDP_OpenSocket: addr %s: %s",com_argv[i+1], gai_strerror(err));
}
switch(resultp->ai_family) {
case AF_INET:
ss4=(struct sockaddr_in *) resultp->ai_addr;
address.sin6_family=AF_INET6;
address.sin6_addr.in6_u.u6_addr32[0]=0;
address.sin6_addr.in6_u.u6_addr32[1]=0;
address.sin6_addr.in6_u.u6_addr32[2]=htonl(0xffff);
address.sin6_addr.in6_u.u6_addr32[3]=ss4->sin_addr.s_addr;
break;
case AF_INET6:
memcpy((void *) &address,(void *) resultp->ai_addr,sizeof(address));
break;
default:
Sys_Error ("UDP_OpenSocket: address family %d not supported",com_argv[i+1], resultp->ai_family);
}
// address.sin_addr.s_addr = inet_addr(com_argv[i+1]);
Con_Printf("Binding to IP Interface Address of %s\n",
inet_ntop(AF_INET6,&address.sin6_addr,addrbuf,sizeof(addrbuf)));
} else
address.sin6_addr = in6addr_any;
if (port == PORT_ANY)
address.sin6_port = 0;
else
address.sin6_port = htons((unsigned short)port);
if( bind (newsocket, (void *)&address, sizeof(address)) == -1)
Sys_Error ("UDP_OpenSocket: bind: %s", strerror(errno));
return newsocket;
}
void NET_GetLocalAddress (void)
{
char buff[MAXHOSTNAMELEN];
struct sockaddr_in6 address;
unsigned int namelen;
if (gethostname(buff, MAXHOSTNAMELEN) == -1)
Sys_Error ("Net_GetLocalAddress: gethostname: %s", strerror(errno));
buff[MAXHOSTNAMELEN-1] = 0;
NET_StringToAdr (buff, &net_local_adr);
namelen = sizeof(address);
if (getsockname (net_socket, (struct sockaddr *)&address, &namelen) == -1)
Sys_Error ("NET_GetLocalAddress: getsockname: %s", strerror(errno));
net_local_adr.port = address.sin6_port;
Con_Printf("IP address %s\n", NET_AdrToString (net_local_adr) );
}
/*
====================
NET_Init
====================
*/
void NET_Init (int port)
{
#ifdef _WIN32
WORD wVersionRequested;
int r;
wVersionRequested = MAKEWORD(1, 1);
r = WSAStartup(MAKEWORD(1, 1), &winsockdata);
if (r)
Sys_Error ("Winsock initialization failed.");
#endif /* _WIN32 */
//
// open the single socket to be used for all communications
//
net_socket = UDP_OpenSocket (port);
//
// init the message buffer
//
net_message.maxsize = sizeof(net_message_buffer);
net_message.data = net_message_buffer;
//
// determine my name & address
//
NET_GetLocalAddress ();
Con_Printf("UDP Initialized\n");
}
/*
====================
NET_Shutdown
====================
*/
void NET_Shutdown (void)
{
#ifdef _WIN32
closesocket(net_socket);
WSACleanup();
#else
close(net_socket);
#endif
}
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