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quakespasm/Quake/net_wins.c
Shpoike aa8dd16dad Display multiple local addresses on the create-game multiplayer menu. 
Hopefully this wll be slightly more useful on multi-homed machines.
2021-08-31 04:59:11 +01:00

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/*
Copyright (C) 1996-2001 Id Software, Inc.
Copyright (C) 2010-2014 QuakeSpasm developers
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.
*/
#include "q_stdinc.h"
#include "arch_def.h"
#include "net_sys.h"
#include "quakedef.h"
#include "net_defs.h"
//ipv4 defs
static sys_socket_t netv4_acceptsocket = INVALID_SOCKET; // socket for fielding new connections
static sys_socket_t netv4_controlsocket;
static sys_socket_t netv4_broadcastsocket = INVALID_SOCKET;
static struct sockaddr_in broadcastaddrv4;
static in_addr_t myAddrv4, bindAddrv4; //spike --keeping separate bind and detected values.
//ipv6 defs
#ifdef IPPROTO_IPV6
typedef struct in_addr6 in_addr6_t;
static sys_socket_t netv6_acceptsocket = INVALID_SOCKET; // socket for fielding new connections
static sys_socket_t netv6_controlsocket;
static struct sockaddr_in6 broadcastaddrv6;
static in_addr6_t myAddrv6, bindAddrv6;
#ifndef IPV6_V6ONLY
#define IPV6_V6ONLY 27
#endif
#endif
//getaddrinfo was added with winxp, but earlier versions don't do ipv6.
//we don't use hybrid sockets, so things are a little easier when it comes to xp vs vista.
//we don't detect the win2k ipv6 tech preview thing. it has different sized addresses, so lets hope microsoft's code handles that if it ever comes up.
int (WSAAPI *qgetaddrinfo)(const char *nodename, const char *servname, const struct addrinfo *hints, struct addrinfo **res);
void (WSAAPI *qfreeaddrinfo)(const struct addrinfo *ai);
#include "net_wins.h"
int winsock_initialized = 0;
WSADATA winsockdata;
#define __wsaerr_static /* not static: used by net_wipx.c too */
#include "wsaerror.h"
//=============================================================================
#if !defined(_USE_WINSOCK2)
static double blocktime;
static INT_PTR PASCAL FAR BlockingHook (void)
{
MSG msg;
BOOL ret;
if ((Sys_DoubleTime() - blocktime) > 2.0)
{
WSACancelBlockingCall();
return FALSE;
}
/* get the next message, if any */
ret = (BOOL) PeekMessage(&msg, NULL, 0, 0, PM_REMOVE);
/* if we got one, process it */
if (ret)
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
/* TRUE if we got a message */
return ret;
}
#endif /* ! _USE_WINSOCK2 */
static void WINIPv4_GetLocalAddress (void)
{
struct hostent *local = NULL;
char buff[MAXHOSTNAMELEN];
in_addr_t addr;
int err;
if (myAddrv4 != INADDR_ANY)
return;
if (gethostname(buff, MAXHOSTNAMELEN) == SOCKET_ERROR)
{
err = SOCKETERRNO;
Con_SafePrintf("WINIPV4_GetLocalAddress: gethostname failed (%s)\n",
socketerror(err));
return;
}
buff[MAXHOSTNAMELEN - 1] = 0;
#ifndef _USE_WINSOCK2
blocktime = Sys_DoubleTime();
WSASetBlockingHook(BlockingHook);
#endif
local = gethostbyname(buff);
err = WSAGetLastError();
#ifndef _USE_WINSOCK2
WSAUnhookBlockingHook();
#endif
if (local == NULL)
{
Con_SafePrintf("WINIPV4_GetLocalAddress: gethostbyname failed (%s)\n",
__WSAE_StrError(err));
return;
}
myAddrv4 = *(in_addr_t *)local->h_addr_list[0];
addr = ntohl(myAddrv4);
sprintf(my_ipv4_address, "%ld.%ld.%ld.%ld", (addr >> 24) & 0xff, (addr >> 16) & 0xff, (addr >> 8) & 0xff, addr & 0xff);
}
sys_socket_t WINIPv4_Init (void)
{
int i, err;
char buff[MAXHOSTNAMELEN];
if (COM_CheckParm ("-noudp") || COM_CheckParm ("-noudp4"))
return -1;
if (winsock_initialized == 0)
{
err = WSAStartup(MAKEWORD(1,1), &winsockdata);
if (err != 0)
{
Con_SafePrintf("Winsock initialization failed (%s)\n",
socketerror(err));
return INVALID_SOCKET;
}
}
winsock_initialized++;
// determine my name & address
if (gethostname(buff, MAXHOSTNAMELEN) != 0)
{
err = SOCKETERRNO;
Con_SafePrintf("WINS_Init: gethostname failed (%s)\n",
socketerror(err));
}
else
{
buff[MAXHOSTNAMELEN - 1] = 0;
}
i = COM_CheckParm ("-ip");
if (i)
{
if (i < com_argc-1)
{
bindAddrv4 = inet_addr(com_argv[i+1]);
if (bindAddrv4 == INADDR_NONE)
Sys_Error ("%s is not a valid IP address", com_argv[i+1]);
strcpy(my_ipv4_address, com_argv[i+1]);
}
else
{
Sys_Error ("NET_Init: you must specify an IP address after -ip");
}
}
else
{
bindAddrv4 = INADDR_ANY;
strcpy(my_ipv4_address, "INADDR_ANY");
}
myAddrv4 = bindAddrv4;
if ((netv4_controlsocket = WINIPv4_OpenSocket(0)) == INVALID_SOCKET)
{
Con_SafePrintf("WINS_Init: Unable to open control socket, UDP disabled\n");
if (--winsock_initialized == 0)
WSACleanup ();
return INVALID_SOCKET;
}
broadcastaddrv4.sin_family = AF_INET;
broadcastaddrv4.sin_addr.s_addr = INADDR_BROADCAST;
broadcastaddrv4.sin_port = htons((unsigned short)net_hostport);
Con_SafePrintf("IPv4 UDP Initialized\n");
ipv4Available = true;
return netv4_controlsocket;
}
//=============================================================================
void WINIPv4_Shutdown (void)
{
WINIPv4_Listen (false);
WINS_CloseSocket (netv4_controlsocket);
if (--winsock_initialized == 0)
WSACleanup ();
}
//=============================================================================
sys_socket_t WINIPv4_Listen (qboolean state)
{
// enable listening
if (state)
{
if (netv4_acceptsocket != INVALID_SOCKET)
return netv4_acceptsocket;
WINIPv4_GetLocalAddress();
netv4_acceptsocket = WINIPv4_OpenSocket (net_hostport);
return netv4_acceptsocket;
}
// disable listening
if (netv4_acceptsocket == INVALID_SOCKET)
return INVALID_SOCKET;
WINS_CloseSocket (netv4_acceptsocket);
netv4_acceptsocket = INVALID_SOCKET;
return INVALID_SOCKET;
}
//=============================================================================
sys_socket_t WINIPv4_OpenSocket (int port)
{
sys_socket_t newsocket;
struct sockaddr_in address;
u_long _true = 1;
int err;
if ((newsocket = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP)) == INVALID_SOCKET)
{
err = SOCKETERRNO;
Con_SafePrintf("WINS_OpenSocket: %s\n", socketerror(err));
return INVALID_SOCKET;
}
if (ioctlsocket (newsocket, FIONBIO, &_true) == SOCKET_ERROR)
goto ErrorReturn;
memset(&address, 0, sizeof(struct sockaddr_in));
address.sin_family = AF_INET;
address.sin_addr.s_addr = bindAddrv4;
address.sin_port = htons((unsigned short)port);
if (bind (newsocket, (struct sockaddr *)&address, sizeof(address)) == 0)
return newsocket;
if (ipv4Available)
{
err = SOCKETERRNO;
Con_Warning ("Unable to bind to %s (%s)\n",
WINS_AddrToString ((struct qsockaddr *) &address, false),
socketerror(err));
return INVALID_SOCKET; /* not reached */
}
/* else: we are still in init phase, no need to error */
ErrorReturn:
err = SOCKETERRNO;
Con_SafePrintf("WINS_OpenSocket: %s\n", socketerror(err));
closesocket (newsocket);
return INVALID_SOCKET;
}
//=============================================================================
int WINS_CloseSocket (sys_socket_t socketid)
{
if (socketid == netv4_broadcastsocket)
netv4_broadcastsocket = INVALID_SOCKET;
return closesocket (socketid);
}
//=============================================================================
/*
============
PartialIPAddress
this lets you type only as much of the net address as required, using
the local network components to fill in the rest
============
*/
static int PartialIPAddress (const char *in, struct qsockaddr *hostaddr)
{
char buff[256];
char *b;
int addr, mask, num, port, run;
buff[0] = '.';
b = buff;
strcpy(buff+1, in);
if (buff[1] == '.')
b++;
addr = 0;
mask = -1;
while (*b == '.')
{
b++;
num = 0;
run = 0;
while (!( *b < '0' || *b > '9'))
{
num = num*10 + *b++ - '0';
if (++run > 3)
return -1;
}
if ((*b < '0' || *b > '9') && *b != '.' && *b != ':' && *b != 0)
return -1;
if (num < 0 || num > 255)
return -1;
mask <<= 8;
addr = (addr<<8) + num;
}
if (*b++ == ':')
port = Q_atoi(b);
else
port = net_hostport;
hostaddr->qsa_family = AF_INET;
((struct sockaddr_in *)hostaddr)->sin_port = htons((unsigned short)port);
((struct sockaddr_in *)hostaddr)->sin_addr.s_addr =
(myAddrv4 & htonl(mask)) | htonl(addr);
return 0;
}
//=============================================================================
int WINS_Connect (sys_socket_t socketid, struct qsockaddr *addr)
{
return 0;
}
//=============================================================================
sys_socket_t WINIPv4_CheckNewConnections (void)
{
char buf[4096];
if (netv4_acceptsocket == INVALID_SOCKET)
return INVALID_SOCKET;
if (recvfrom (netv4_acceptsocket, buf, sizeof(buf), MSG_PEEK, NULL, NULL)
!= SOCKET_ERROR)
{
return netv4_acceptsocket;
}
return INVALID_SOCKET;
}
//=============================================================================
int WINS_Read (sys_socket_t socketid, byte *buf, int len, struct qsockaddr *addr)
{
socklen_t addrlen = sizeof(struct qsockaddr);
int ret;
ret = recvfrom (socketid, (char *)buf, len, 0, (struct sockaddr *)addr, &addrlen);
if (ret == SOCKET_ERROR)
{
int err = SOCKETERRNO;
if (err == NET_EWOULDBLOCK || err == NET_ECONNREFUSED)
return 0;
if (err == WSAECONNRESET)
Con_DPrintf ("WINS_Read, recvfrom: %s (%s)\n", socketerror(err), WINS_AddrToString(addr, false));
else
Con_SafePrintf ("WINS_Read, recvfrom: %s\n", socketerror(err));
}
return ret;
}
//=============================================================================
static int WINS_MakeSocketBroadcastCapable (sys_socket_t socketid)
{
int i = 1;
// make this socket broadcast capable
if (setsockopt(socketid, SOL_SOCKET, SO_BROADCAST, (char *)&i, sizeof(i))
== SOCKET_ERROR)
{
int err = SOCKETERRNO;
Con_SafePrintf ("UDP, setsockopt: %s\n", socketerror(err));
return -1;
}
netv4_broadcastsocket = socketid;
return 0;
}
//=============================================================================
int WINIPv4_Broadcast (sys_socket_t socketid, byte *buf, int len)
{
int ret;
if (socketid != netv4_broadcastsocket)
{
if (netv4_broadcastsocket != INVALID_SOCKET)
Sys_Error("Attempted to use multiple broadcasts sockets");
WINIPv4_GetLocalAddress();
ret = WINS_MakeSocketBroadcastCapable (socketid);
if (ret == -1)
{
Con_SafePrintf("Unable to make socket broadcast capable\n");
return ret;
}
}
return WINS_Write (socketid, buf, len, (struct qsockaddr *)&broadcastaddrv4);
}
//=============================================================================
int WINS_Write (sys_socket_t socketid, byte *buf, int len, struct qsockaddr *addr)
{
int ret;
ret = sendto (socketid, (char *)buf, len, 0, (struct sockaddr *)addr,
sizeof(struct qsockaddr));
if (ret == SOCKET_ERROR)
{
int err = SOCKETERRNO;
if (err == NET_EWOULDBLOCK)
return 0;
Con_SafePrintf ("WINS_Write, sendto: %s\n", socketerror(err));
}
return ret;
}
//=============================================================================
unsigned short ntohs_v6word(struct qsockaddr *addr, int wordnum)
{
unsigned char *ptr = ((struct sockaddr_in6 *)addr)->sin6_addr.s6_addr + wordnum*2;
return (unsigned short)(ptr[0]<<8) | ptr[1];
}
const char *WINS_AddrToString (struct qsockaddr *addr, qboolean masked)
{
static char buffer[64];
int haddr;
#ifdef IPPROTO_IPV6
if (addr->qsa_family == AF_INET6)
{
if (masked)
{
q_snprintf(buffer, sizeof(buffer), "[%x:%x:%x:%x::]/64",
ntohs_v6word(addr, 0),
ntohs_v6word(addr, 1),
ntohs_v6word(addr, 2),
ntohs_v6word(addr, 3));
}
else
{
if (((struct sockaddr_in6 *)addr)->sin6_scope_id)
{
q_snprintf(buffer, sizeof(buffer), "[%x:%x:%x:%x:%x:%x:%x:%x%%%i]:%d",
ntohs_v6word(addr, 0),
ntohs_v6word(addr, 1),
ntohs_v6word(addr, 2),
ntohs_v6word(addr, 3),
ntohs_v6word(addr, 4),
ntohs_v6word(addr, 5),
ntohs_v6word(addr, 6),
ntohs_v6word(addr, 7),
(int)((struct sockaddr_in6 *)addr)->sin6_scope_id,
ntohs(((struct sockaddr_in6 *)addr)->sin6_port));
}
else
{
q_snprintf(buffer, sizeof(buffer), "[%x:%x:%x:%x:%x:%x:%x:%x]:%d",
ntohs_v6word(addr, 0),
ntohs_v6word(addr, 1),
ntohs_v6word(addr, 2),
ntohs_v6word(addr, 3),
ntohs_v6word(addr, 4),
ntohs_v6word(addr, 5),
ntohs_v6word(addr, 6),
ntohs_v6word(addr, 7),
ntohs(((struct sockaddr_in6 *)addr)->sin6_port));
}
}
}
else
#endif
{
haddr = ntohl(((struct sockaddr_in *)addr)->sin_addr.s_addr);
if (masked)
{
sprintf(buffer, "%d.%d.%d.0/24", (haddr >> 24) & 0xff,
(haddr >> 16) & 0xff, (haddr >> 8) & 0xff);
}
else
{
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));
}
}
return buffer;
}
//=============================================================================
int WINIPv4_StringToAddr (const char *string, struct qsockaddr *addr)
{
int ha1, ha2, ha3, ha4, hp, ipaddr;
sscanf(string, "%d.%d.%d.%d:%d", &ha1, &ha2, &ha3, &ha4, &hp);
ipaddr = (ha1 << 24) | (ha2 << 16) | (ha3 << 8) | ha4;
addr->qsa_family = AF_INET;
((struct sockaddr_in *)addr)->sin_addr.s_addr = htonl(ipaddr);
((struct sockaddr_in *)addr)->sin_port = htons((unsigned short)hp);
return 0;
}
//=============================================================================
int WINS_GetSocketAddr (sys_socket_t socketid, struct qsockaddr *addr)
{
socklen_t addrlen = sizeof(struct qsockaddr);
memset(addr, 0, sizeof(struct qsockaddr));
getsockname(socketid, (struct sockaddr *)addr, &addrlen);
if (addr->qsa_family == AF_INET)
{
in_addr_t a = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
if (a == 0 || a == htonl(INADDR_LOOPBACK))
((struct sockaddr_in *)addr)->sin_addr.s_addr = myAddrv4;
}
#ifdef IPPROTO_IPV6
if (addr->qsa_family == AF_INET6)
{
static const in_addr6_t in6addr_any;// = IN6ADDR_ANY_INIT;
if (!memcmp(&((struct sockaddr_in6 *)addr)->sin6_addr, &in6addr_any, sizeof(in_addr6_t)))
memcpy(&((struct sockaddr_in6 *)addr)->sin6_addr, &myAddrv6, sizeof(struct sockaddr_in6));
}
#endif
return 0;
}
//=============================================================================
int WINIPv4_GetNameFromAddr (struct qsockaddr *addr, char *name)
{
struct hostent *hostentry;
hostentry = gethostbyaddr ((char *)&((struct sockaddr_in *)addr)->sin_addr,
sizeof(struct in_addr), AF_INET);
if (hostentry)
{
Q_strncpy (name, (char *)hostentry->h_name, NET_NAMELEN - 1);
return 0;
}
Q_strcpy (name, WINS_AddrToString (addr, false));
return 0;
}
int WINIPv4_GetAddresses (qhostaddr_t *addresses, int maxaddresses)
{
int result = 0, b;
struct hostent *h;
if (bindAddrv4 == INADDR_ANY)
{
//on windows, we can just do a dns lookup on our own hostname and expect an ipv4 result
char hostname[64];
u_long addr;
gethostname(hostname, sizeof(hostname));
h = gethostbyname(hostname);
if(h && h->h_addrtype == AF_INET)
{
for (b = 0; h->h_addr_list[b] && result < maxaddresses; b++)
{
addr = ntohl(*(in_addr_t *)h->h_addr_list[b]);
q_snprintf(addresses[result++], sizeof(addresses[0]), "%ld.%ld.%ld.%ld", (addr >> 24) & 0xff, (addr >> 16) & 0xff, (addr >> 8) & 0xff, addr & 0xff);
}
}
}
if (!result)
q_strlcpy(addresses[result++], my_ipv4_address, sizeof(addresses[0]));
return result;
}
int WINIPv6_GetAddresses (qhostaddr_t *addresses, int maxaddresses)
{
int result = 0;
// if (bindAddrv6 == IN6ADDR_ANY_INIT)
{
//on windows, we can just do a dns lookup on our own hostname and expect an ipv4 result
struct addrinfo hints, *addrlist, *itr;
char hostname[64];
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_INET6; /* Allow IPv4 or IPv6 */
hints.ai_socktype = SOCK_DGRAM; /* Datagram socket */
hints.ai_flags = 0;
hints.ai_protocol = 0; /* Any protocol */
gethostname(hostname, sizeof(hostname));
if (qgetaddrinfo(hostname, NULL, &hints, &addrlist) == 0)
{
for (itr = addrlist; itr && result < maxaddresses; itr = itr->ai_next)
{
if (itr->ai_addr->sa_family == AF_INET6)
q_strlcpy(addresses[result++], WINS_AddrToString((struct qsockaddr*)itr->ai_addr, false), sizeof(addresses[0]));
}
freeaddrinfo(addrlist);
}
}
if (!result)
q_strlcpy(addresses[result++], my_ipv6_address, sizeof(addresses[0]));
return result;
}
//=============================================================================
int WINIPv4_GetAddrFromName (const char *name, struct qsockaddr *addr)
{
struct hostent *hostentry;
char *colon;
unsigned short port = net_hostport;
if (name[0] >= '0' && name[0] <= '9')
return PartialIPAddress (name, addr);
colon = strrchr(name, ':');
if (colon)
{
char dupe[MAXHOSTNAMELEN];
if (colon-name+1 > MAXHOSTNAMELEN)
return -1;
memcpy(dupe, name, colon-name);
dupe[colon-name] = 0;
if (strchr(dupe, ':'))
return -1; //don't resolve a name to an ipv4 address if it has multiple colons in it. its probably an ipx or ipv6 address, and I'd rather not block on any screwed dns resolves
hostentry = gethostbyname (dupe);
port = strtoul(colon+1, NULL, 10);
}
else
hostentry = gethostbyname (name);
if (!hostentry)
return -1;
addr->qsa_family = AF_INET;
((struct sockaddr_in *)addr)->sin_port = htons(port);
((struct sockaddr_in *)addr)->sin_addr.s_addr =
*(in_addr_t *)hostentry->h_addr_list[0];
return 0;
}
//=============================================================================
int WINS_AddrCompare (struct qsockaddr *addr1, struct qsockaddr *addr2)
{
if (addr1->qsa_family != addr2->qsa_family)
return -1;
#ifdef IPPROTO_IPV6
if (addr1->qsa_family == AF_INET6)
{
if (memcmp(&((struct sockaddr_in6 *)addr1)->sin6_addr, &((struct sockaddr_in6 *)addr2)->sin6_addr, sizeof(((struct sockaddr_in6 *)addr2)->sin6_addr)))
return -1;
if (((struct sockaddr_in6 *)addr1)->sin6_port !=
((struct sockaddr_in6 *)addr2)->sin6_port)
return 1;
if (((struct sockaddr_in6 *)addr1)->sin6_scope_id &&
((struct sockaddr_in6 *)addr2)->sin6_scope_id &&
((struct sockaddr_in6 *)addr1)->sin6_scope_id !=
((struct sockaddr_in6 *)addr2)->sin6_scope_id) //the ipv6 scope id is for use with link-local addresses, to identify the specific interface.
return 1;
}
else
#endif
{
if (((struct sockaddr_in *)addr1)->sin_addr.s_addr !=
((struct sockaddr_in *)addr2)->sin_addr.s_addr)
return -1;
if (((struct sockaddr_in *)addr1)->sin_port !=
((struct sockaddr_in *)addr2)->sin_port)
return 1;
}
return 0;
}
//=============================================================================
int WINS_GetSocketPort (struct qsockaddr *addr)
{
#ifdef IPPROTO_IPV6
if (addr->qsa_family == AF_INET6)
return ntohs(((struct sockaddr_in6 *)addr)->sin6_port);
else
#endif
return ntohs(((struct sockaddr_in *)addr)->sin_port);
}
int WINS_SetSocketPort (struct qsockaddr *addr, int port)
{
#ifdef IPPROTO_IPV6
if (addr->qsa_family == AF_INET6)
((struct sockaddr_in6 *)addr)->sin6_port = htons((unsigned short)port);
else
#endif
((struct sockaddr_in *)addr)->sin_port = htons((unsigned short)port);
return 0;
}
//=============================================================================
#ifdef IPPROTO_IPV6
//winxp (and possibly win2k) is dual stack.
//vista+ has a hybrid stack
static void WINIPv6_GetLocalAddress (void)
{
char buff[MAXHOSTNAMELEN];
int err;
struct addrinfo hints, *local = NULL;
// if (myAddrv6 != IN6ADDR_ANY)
// return;
if (gethostname(buff, MAXHOSTNAMELEN) == SOCKET_ERROR)
{
err = SOCKETERRNO;
Con_SafePrintf("WINIPv6_GetLocalAddress: gethostname failed (%s)\n",
socketerror(err));
return;
}
buff[MAXHOSTNAMELEN - 1] = 0;
#ifndef _USE_WINSOCK2
blocktime = Sys_DoubleTime();
WSASetBlockingHook(BlockingHook);
#endif
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET6;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_protocol = IPPROTO_UDP;
if (qgetaddrinfo && qgetaddrinfo(buff, NULL, &hints, &local) == 0)
{
size_t l;
q_strlcpy(my_ipv6_address, WINS_AddrToString((struct qsockaddr*)local->ai_addr, false), sizeof(my_ipv6_address));
l = strlen(my_ipv6_address);
if (l > 2 && !strcmp(my_ipv6_address+l-2, ":0"))
my_ipv6_address[l-2] = 0;
qfreeaddrinfo(local);
}
err = WSAGetLastError();
#ifndef _USE_WINSOCK2
WSAUnhookBlockingHook();
#endif
if (local == NULL)
{
Con_SafePrintf("WINIPv6_GetLocalAddress: gethostbyname failed (%s)\n",
__WSAE_StrError(err));
return;
}
}
sys_socket_t WINIPv6_Init (void)
{
int i;
char buff[MAXHOSTNAMELEN];
if (COM_CheckParm ("-noudp") || COM_CheckParm ("-noudp6"))
return -1;
qgetaddrinfo = (void*)GetProcAddress(GetModuleHandle("ws2_32.dll"), "getaddrinfo");
qfreeaddrinfo = (void*)GetProcAddress(GetModuleHandle("ws2_32.dll"), "freeaddrinfo");
if (!qgetaddrinfo || !qfreeaddrinfo)
{
qgetaddrinfo = NULL;
qfreeaddrinfo = NULL;
Con_SafePrintf("Winsock lacks getaddrinfo, ipv6 support is unavailable.\n");
return INVALID_SOCKET;
}
if (winsock_initialized == 0)
{
int err = WSAStartup(MAKEWORD(2,2), &winsockdata);
if (err != 0)
{
Con_SafePrintf("Winsock initialization failed (%s)\n",
socketerror(err));
return INVALID_SOCKET;
}
}
winsock_initialized++;
// determine my name & address
if (gethostname(buff, MAXHOSTNAMELEN) != 0)
{
int err = SOCKETERRNO;
Con_SafePrintf("WINIPv6_Init: gethostname failed (%s)\n",
socketerror(err));
}
else
{
buff[MAXHOSTNAMELEN - 1] = 0;
}
i = COM_CheckParm ("-ip6");
if (i)
{
if (i < com_argc-1)
{
if (WINIPv6_GetAddrFromName(com_argv[i+1], (struct qsockaddr*)&bindAddrv6))
Sys_Error ("%s is not a valid IPv6 address", com_argv[i+1]);
if (!*my_ipv6_address)
strcpy(my_ipv6_address, com_argv[i+1]);
}
else
{
Sys_Error ("WINIPv6_Init: you must specify an IP address after -ip");
}
}
else
{
memset(&bindAddrv6, 0, sizeof(bindAddrv6));
if (!*my_ipv6_address)
{
strcpy(my_ipv6_address, "[::]");
WINIPv6_GetLocalAddress();
}
}
myAddrv6 = bindAddrv6;
if ((netv6_controlsocket = WINIPv6_OpenSocket(0)) == INVALID_SOCKET)
{
Con_SafePrintf("WINIPv6_Init: Unable to open control socket, UDP disabled\n");
if (--winsock_initialized == 0)
WSACleanup ();
return INVALID_SOCKET;
}
broadcastaddrv6.sin6_family = AF_INET6;
memset(&broadcastaddrv6.sin6_addr, 0, sizeof(broadcastaddrv6.sin6_addr));
broadcastaddrv6.sin6_addr.s6_addr[0] = 0xff;
broadcastaddrv6.sin6_addr.s6_addr[1] = 0x03;
broadcastaddrv6.sin6_addr.s6_addr[15] = 0x01;
broadcastaddrv6.sin6_port = htons((unsigned short)net_hostport);
Con_SafePrintf("IPv6 UDP Initialized\n");
ipv6Available = true;
return netv6_controlsocket;
}
sys_socket_t WINIPv6_Listen (qboolean state)
{
if (state)
{
// enable listening
if (netv6_acceptsocket == INVALID_SOCKET)
netv6_acceptsocket = WINIPv6_OpenSocket (net_hostport);
}
else
{
// disable listening
if (netv6_acceptsocket != INVALID_SOCKET)
{
WINS_CloseSocket (netv6_acceptsocket);
netv6_acceptsocket = INVALID_SOCKET;
}
}
return netv6_acceptsocket;
}
void WINIPv6_Shutdown (void)
{
WINIPv6_Listen(false);
WINS_CloseSocket (netv6_controlsocket);
if (--winsock_initialized == 0)
WSACleanup ();
}
sys_socket_t WINIPv6_OpenSocket (int port)
{
sys_socket_t newsocket;
struct sockaddr_in6 address;
u_long _true = 1;
int err;
if ((newsocket = socket (PF_INET6, SOCK_DGRAM, IPPROTO_UDP)) == INVALID_SOCKET)
{
err = SOCKETERRNO;
Con_SafePrintf("WINS_OpenSocket: %s\n", socketerror(err));
return INVALID_SOCKET;
}
setsockopt(newsocket, IPPROTO_IPV6, IPV6_V6ONLY, (char *)&_true, sizeof(_true));
if (ioctlsocket (newsocket, FIONBIO, &_true) == SOCKET_ERROR)
goto ErrorReturn;
memset(&address, 0, sizeof(address));
address.sin6_family = AF_INET6;
address.sin6_addr = bindAddrv6;
address.sin6_port = htons((unsigned short)port);
if (bind (newsocket, (struct sockaddr *)&address, sizeof(address)) == 0)
{
//we don't know if we're the server or not. oh well.
struct ipv6_mreq req;
req.ipv6mr_multiaddr = broadcastaddrv6.sin6_addr;
req.ipv6mr_interface = 0;
setsockopt(newsocket, IPPROTO_IPV6, IPV6_JOIN_GROUP, (char *)&req, sizeof(req));
return newsocket;
}
if (ipv6Available)
{
err = SOCKETERRNO;
Con_Warning ("Unable to bind to %s (%s)\n",
WINS_AddrToString ((struct qsockaddr *) &address, false),
socketerror(err));
return INVALID_SOCKET; /* not reached */
}
/* else: we are still in init phase, no need to error */
ErrorReturn:
err = SOCKETERRNO;
Con_SafePrintf("WINS_OpenSocket: %s\n", socketerror(err));
closesocket (newsocket);
return INVALID_SOCKET;
}
sys_socket_t WINIPv6_CheckNewConnections (void)
{
char buf[4096];
if (netv6_acceptsocket == INVALID_SOCKET)
return INVALID_SOCKET;
if (recvfrom (netv6_acceptsocket, buf, sizeof(buf), MSG_PEEK, NULL, NULL)
!= SOCKET_ERROR)
{
return netv6_acceptsocket;
}
return INVALID_SOCKET;
}
int WINIPv6_Broadcast (sys_socket_t socketid, byte *buf, int len)
{
broadcastaddrv6.sin6_port = htons((unsigned short)net_hostport);
return WINS_Write(socketid, buf, len, (struct qsockaddr*)&broadcastaddrv6);
}
int WINIPv6_StringToAddr (const char *string, struct qsockaddr *addr)
{ //This is never actually called...
return -1;
}
int WINIPv6_GetNameFromAddr (struct qsockaddr *addr, char *name)
{
//FIXME: should really do a reverse dns lookup.
q_strlcpy(name, WINS_AddrToString(addr, false), NET_NAMELEN);
return 0;
}
int WINIPv6_GetAddrFromName (const char *name, struct qsockaddr *addr)
{
//ipv6 addresses take form of [::1]:26000 or eg localhost:26000. just ::1 is NOT supported, but localhost as-is is okay. [localhost]:26000 is acceptable, but will fail to resolve as ipv4.
struct addrinfo *addrinfo = NULL;
struct addrinfo *pos;
struct addrinfo udp6hint;
int error;
char *port;
char dupbase[256];
size_t len;
qboolean success = false;
memset(&udp6hint, 0, sizeof(udp6hint));
udp6hint.ai_family = 0;//Any... we check for AF_INET6 or 4
udp6hint.ai_socktype = SOCK_DGRAM;
udp6hint.ai_protocol = IPPROTO_UDP;
if (*name == '[')
{
port = strstr(name, "]");
if (!port)
error = EAI_NONAME;
else
{
len = port - (name+1);
if (len >= sizeof(dupbase))
len = sizeof(dupbase)-1;
strncpy(dupbase, name+1, len);
dupbase[len] = '\0';
error = qgetaddrinfo?qgetaddrinfo(dupbase, (port[1] == ':')?port+2:NULL, &udp6hint, &addrinfo):EAI_NONAME;
}
}
else
{
port = strrchr(name, ':');
if (port)
{
len = port - name;
if (len >= sizeof(dupbase))
len = sizeof(dupbase)-1;
strncpy(dupbase, name, len);
dupbase[len] = '\0';
error = qgetaddrinfo?qgetaddrinfo(dupbase, port+1, &udp6hint, &addrinfo):EAI_NONAME;
}
else
error = EAI_NONAME;
if (error) //failed, try string with no port.
error = qgetaddrinfo?qgetaddrinfo(name, NULL, &udp6hint, &addrinfo):EAI_NONAME; //remember, this func will return any address family that could be using the udp protocol... (ip4 or ip6)
}
if (!error)
{
((struct sockaddr*)addr)->sa_family = 0;
for (pos = addrinfo; pos; pos = pos->ai_next)
{
if (0)//pos->ai_family == AF_INET)
{
memcpy(addr, pos->ai_addr, pos->ai_addrlen);
success = true;
break;
}
if (pos->ai_family == AF_INET6 && !success)
{
memcpy(addr, pos->ai_addr, pos->ai_addrlen);
success = true;
}
}
freeaddrinfo (addrinfo);
}
if (success)
{
if (((struct sockaddr*)addr)->sa_family == AF_INET)
{
if (!((struct sockaddr_in *)addr)->sin_port)
((struct sockaddr_in *)addr)->sin_port = htons(net_hostport);
}
else if (((struct sockaddr*)addr)->sa_family == AF_INET6)
{
if (!((struct sockaddr_in6 *)addr)->sin6_port)
((struct sockaddr_in6 *)addr)->sin6_port = htons(net_hostport);
}
return 0;
}
return -1;
}
#endif
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