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newtree/source/net_udp6.c

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/*
net_udp6.c
(description)
Copyright (C) 1996-1997 Id Software, Inc.
Copyright (C) 1999,2000 Nelson Rush.
Copyright (C) 2000 Marcus Sundberg [mackan@stacken.kth.se]
Copyright (C) 1999,2000 contributors of the QuakeForge project
Please see the file "AUTHORS" for a list of contributors
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:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
$Id$
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef _WIN32
# ifdef HAVE_IPV6
# include <winsock2.h>
# include <ws2tcpip.h>
# include <tpipv6.h>
# define _WINSOCKAPI_
# define HAVE_SOCKLEN_T
# endif
#endif
#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
#ifdef _WIN32
# include <windows.h>
# undef EWOULDBLOCK
# define EWOULDBLOCK WSAEWOULDBLOCK
#endif
#ifndef _WIN32
#include <unistd.h>
#endif
#include <sys/types.h>
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#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 NeXT
#include <libc.h>
#endif
#include "console.h"
#include "net.h"
#include "qargs.h"
#include "qtypes.h"
#include "sys.h"
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 512
#endif
#ifdef __GLIBC__ // glibc macro
#define s6_addr32 in6_u.u6_addr32
#define ss_family __ss_family
#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;
memcpy (&s->sin6_addr, a->ip, sizeof (s->sin6_addr));
s->sin6_port = a->port;
#ifdef HAVE_SIN6_LEN
s->sin6_len = sizeof (struct sockaddr_in6);
#endif
}
void
SockadrToNetadr (struct sockaddr_in6 *s, netadr_t *a)
{
memcpy (a->ip, &s->sin6_addr, sizeof (s->sin6_addr));
a->port = s->sin6_port;
a->family = s->sin6_family;
}
qboolean
NET_AdrIsLoopback (netadr_t a)
{
if (IN6_IS_ADDR_LOOPBACK ((struct in6_addr *) &a.ip))
return true;
else if (IN6_IS_ADDR_V4MAPPED ((struct in6_addr *) &a.ip) &&
((struct in_addr *) &a.ip[3])->s_addr == htonl (INADDR_LOOPBACK))
return true;
return false;
}
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_storage ss;
// NetadrToSockadr(&a,&sa);
memset (&ss, 0, sizeof (ss));
if (IN6_IS_ADDR_V4MAPPED ((struct in6_addr *) a.ip)) {
#ifdef HAVE_SS_LEN
ss.ss_len = sizeof (struct sockaddr_in);
#endif
ss.ss_family = AF_INET;
memcpy (&((struct sockaddr_in *) &ss)->sin_addr,
&((struct in6_addr *) a.ip)->s6_addr[12],
sizeof (struct in_addr));
} else {
#ifdef HAVE_SS_LEN
ss.ss_len = sizeof (struct sockaddr_in6);
#endif
ss.ss_family = AF_INET6;
memcpy (&((struct sockaddr_in6 *) &ss)->sin6_addr,
a.ip, sizeof (struct in6_addr));
}
#ifdef HAVE_SS_LEN
if (getnameinfo ((struct sockaddr *) &ss, ss.ss_len, s, sizeof (s),
NULL, 0, NI_NUMERICHOST)) strcpy (s, "<invalid>");
#else
// maybe needs switch for AF_INET6 or AF_INET?
if (getnameinfo ((struct sockaddr *) &ss, sizeof (ss), s, sizeof (s),
NULL, 0, NI_NUMERICHOST))
strcpy (s, "<invalid>");
#endif
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;
memset (&ss6->sin6_addr, 0, sizeof (ss6->sin6_addr));
ss6->sin6_addr.s6_addr[10] = ss6->sin6_addr.s6_addr[11] = 0xff;
memcpy (&ss6->sin6_addr.s6_addr[12], &ss4->sin_addr,
sizeof (ss4->sin_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 newsocket;
struct sockaddr_in6 address;
struct addrinfo hints, *res;
int Error;
char Buf[BUFSIZ], *Host, *Service;
#ifdef IPV6_BINDV6ONLY
int dummy;
#endif
#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
memset (&hints, 0, sizeof (hints));
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_protocol = IPPROTO_UDP;
hints.ai_flags = AI_PASSIVE;
if ((i = COM_CheckParm ("-ip")) != 0 && i < com_argc) {
Host = com_argv[i + 1];
} else {
Host = "0::0";
}
Con_Printf ("Binding to IP Interface Address of %s\n", Host);
if (port == PORT_ANY)
Service = NULL;
else {
sprintf (Buf, "%5d", port);
Service = Buf;
}
if ((Error = getaddrinfo (Host, Service, &hints, &res)))
Sys_Error ("UDP_OpenSocket: getaddrinfo: %s", gai_strerror (Error));
if (
(newsocket =
socket (res->ai_family, res->ai_socktype, res->ai_protocol)) == -1)
Sys_Error ("UDP_OpenSocket: socket: %s", strerror (errno));
// FIONBIO sets non-blocking IO for this socket
#ifdef _WIN32
if (ioctl (newsocket, FIONBIO, &_true) == -1)
#else /* _WIN32 */
if (ioctl (newsocket, FIONBIO, (char *) &_true) == -1)
#endif /* _WIN32 */
Sys_Error ("UDP_OpenSocket: ioctl FIONBIO: %s", strerror (errno));
#ifdef IPV6_BINDV6ONLY
if (setsockopt (newsocket, IPPROTO_IPV6, IPV6_BINDV6ONLY, &dummy,
sizeof (dummy)) < 0) {
/* I don't care */
}
#endif
if (bind (newsocket, res->ai_addr, res->ai_addrlen) < 0)
Sys_Error ("UDP_OpenSocket: bind: %s", strerror (errno));
freeaddrinfo (res);
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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