qf
/
quakeforge
mirror of https://git.code.sf.net/p/quake/quakeforge
0
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
quakeforge/libs/net/nc/net_udp.c

446 lines
9.3 KiB
C
Raw Blame History

/*
net_udp.c
(description)
Copyright (C) 1996-1997 Id Software, Inc.
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:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
/* Sun's model_t in sys/model.h conflicts w/ Quake's model_t */
#define model_t quakeforgemodel_t
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_FCNTL_H
# include <fcntl.h>
#endif
#ifdef HAVE_SYS_PARAM_H
# include <sys/param.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
#ifdef NeXT
# include <libc.h>
#endif
#ifdef _WIN32
# include <windows.h>
# undef EWOULDBLOCK
# define EWOULDBLOCK WSAEWOULDBLOCK
#endif
#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
#undef model_t
#include "QF/dstring.h"
#include "QF/msg.h"
#include "QF/qargs.h"
#include "QF/sys.h"
#include "netchan.h"
#ifndef MAXHOSTNAMELEN
# define MAXHOSTNAMELEN 512
#endif
#ifndef HAVE_SOCKLEN_T
# ifdef _WIN32
typedef int socklen_t;
# else
# ifdef HAVE_SIZE
typedef size_t socklen_t;
# else
typedef unsigned int socklen_t;
# endif
# endif
#endif
netadr_t net_from;
netadr_t net_local_adr;
netadr_t net_loopback_adr;
int net_socket;
static sizebuf_t _net_message_message;
static qmsg_t _net_message = {0, 0, &_net_message_message};
qmsg_t *net_message = &_net_message;
#define MAX_UDP_PACKET (MAX_MSGLEN*2)
byte net_message_buffer[MAX_UDP_PACKET];
#ifdef _WIN32
WSADATA winsockdata;
#endif
#define ADDR_SIZE 4
typedef union address {
#ifdef HAV_SS_LEN // FIXME check properly, but should be ok
struct sockaddr_storage ss;
#endif
struct sockaddr sa;
struct sockaddr_in s4;
} AF_address_t;
#undef SA_LEN
#undef SS_LEN
#ifdef HAVE_SA_LEN
#define SA_LEN(sa) (sa)->sa_len
#else
#define SA_LEN(sa) (sizeof(struct sockaddr_in))
#endif
#ifdef HAVE_SS_LEN
#define SS_LEN(ss) (ss)->ss_len
#else
#define SS_LEN(ss) (sizeof(struct sockaddr_in))
#endif
static void
NetadrToSockadr (netadr_t *a, AF_address_t *s)
{
memset (s, 0, sizeof (*s));
s->s4.sin_family = AF_INET;
memcpy (&s->s4.sin_addr, &a->ip, ADDR_SIZE);
s->s4.sin_port = a->port;
}
static void
SockadrToNetadr (AF_address_t *s, netadr_t *a)
{
memcpy (&a->ip, &s->s4.sin_addr, ADDR_SIZE);
a->port = s->s4.sin_port;
}
qboolean
NET_CompareBaseAdr (netadr_t a, netadr_t b)
{
if (memcmp (a.ip, b.ip, ADDR_SIZE) == 0)
return true;
return false;
}
qboolean
NET_CompareAdr (netadr_t a, netadr_t b)
{
if (memcmp (a.ip, b.ip, ADDR_SIZE) == 0 && a.port == b.port)
return true;
return false;
}
const char *
NET_AdrToString (netadr_t a)
{
static char s[64];
snprintf (s, sizeof (s), "%i.%i.%i.%i:%i", a.ip[0], a.ip[1], a.ip[2],
a.ip[3], ntohs (a.port));
return s;
}
const char *
NET_BaseAdrToString (netadr_t a)
{
static char s[64];
snprintf (s, sizeof (s), "%i.%i.%i.%i", a.ip[0], a.ip[1], a.ip[2], a.ip[3]);
return s;
}
/*
NET_StringToAdr
idnewt
idnewt:28000
192.246.40.70
192.246.40.70:28000
*/
qboolean
NET_StringToAdr (const char *s, netadr_t *a)
{
static dstring_t *copy;
char *colon;
struct hostent *h;
AF_address_t sadr;
if (!copy)
copy = dstring_new ();
memset (&sadr, 0, sizeof (sadr));
sadr.s4.sin_family = AF_INET;
sadr.s4.sin_port = 0;
dstring_copystr (copy, s);
// strip off a trailing :port if present
for (colon = copy->str; *colon; colon++)
if (*colon == ':') {
*colon = 0;
sadr.s4.sin_port = htons ((unsigned short) atoi (colon + 1));
}
if (copy->str[0] >= '0' && copy->str[0] <= '9') {
int addr = inet_addr (copy->str);
memcpy (&sadr.s4.sin_addr, &addr, ADDR_SIZE);
} else {
if (!(h = gethostbyname (copy->str)))
return 0;
memcpy (&sadr.s4.sin_addr, h->h_addr_list[0], ADDR_SIZE);
}
SockadrToNetadr (&sadr, a);
return true;
}
qboolean
NET_GetPacket (void)
{
int ret;
socklen_t fromlen;
AF_address_t from;
fromlen = sizeof (from);
memset (&from, 0, sizeof (from));
ret = recvfrom (net_socket, (void *) net_message_buffer,
sizeof (net_message_buffer), 0, &from.sa, &fromlen);
if (ret == -1) {
#ifdef _WIN32
int err = WSAGetLastError ();
if (err == WSAEMSGSIZE) {
Sys_Printf ("Warning: Oversize packet from %s\n",
NET_AdrToString (net_from));
return false;
}
if (err == 10054) {
Sys_Printf ("NET_GetPacket: error 10054 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;
}
SockadrToNetadr (&from, &net_from);
// Check for malformed packets
if (ntohs (net_from.port) < 1024) {
Sys_Printf ("Warning: Packet from %s dropped: Bad port\n",
NET_AdrToString (net_from));
return false;
}
if (from.s4.sin_addr.s_addr == INADDR_ANY
|| from.s4.sin_addr.s_addr == INADDR_BROADCAST) {
Sys_Printf ("Warning: Packet dropped - bad address\n");
return false;
}
_net_message_message.cursize = ret;
if (ret == sizeof (net_message_buffer)) {
Sys_Printf ("Oversize packet from %s\n", NET_AdrToString (net_from));
return false;
}
return ret;
}
void
NET_SendPacket (int length, const void *data, netadr_t to)
{
int ret;
AF_address_t addr;
NetadrToSockadr (&to, &addr);
ret = sendto (net_socket, data, length, 0, &addr.sa, SA_LEN (&addr.sa));
if (ret == -1) {
#ifdef _WIN32
int err = WSAGetLastError ();
if (err == WSAEADDRNOTAVAIL)
Sys_Printf ("NET_SendPacket Warning: %i\n", err);
#else /* _WIN32 */
int err = errno;
if (err == ECONNREFUSED)
return;
#endif /* _WIN32 */
if (err == EWOULDBLOCK)
return;
Sys_Printf ("NET_SendPacket: %s\n", strerror (err));
}
}
static int
UDP_OpenSocket (int port)
{
int newsocket, i;
AF_address_t address;
#ifdef _WIN32
#define ioctl ioctlsocket
unsigned long flags;
#else
int flags;
#endif
memset (&address, 0, sizeof(address));
if ((newsocket = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1)
Sys_Error ("UDP_OpenSocket: socket: %s", strerror (errno));
#if defined (HAVE_IOCTL) || defined (_WIN32)
flags = 1;
if (ioctl (newsocket, FIONBIO, &flags) == -1)
Sys_Error ("UDP_OpenSocket: ioctl FIONBIO: %s", strerror (errno));
#else
flags = fcntl(newsocket, F_GETFL, 0);
if (fcntl (newsocket, F_SETFL, flags | O_NONBLOCK) == -1)
Sys_Error ("UDP_OpenSocket: fcntl O_NONBLOCK: %s", strerror (errno));
#endif
address.s4.sin_family = AF_INET;
// ZOID -- check for interface binding option
if ((i = COM_CheckParm ("-ip")) != 0 && i < com_argc) {
address.s4.sin_addr.s_addr = inet_addr (com_argv[i + 1]);
Sys_Printf ("Binding to IP Interface Address of %s\n",
inet_ntoa (address.s4.sin_addr));
} else
address.s4.sin_addr.s_addr = INADDR_ANY;
if (port == PORT_ANY)
address.s4.sin_port = 0;
else
address.s4.sin_port = htons ((short) port);
if (bind (newsocket, &address.sa, SA_LEN (&address.sa)) == -1)
Sys_Error ("UDP_OpenSocket: bind: %s", strerror (errno));
return newsocket;
}
static void
NET_GetLocalAddress (void)
{
char buff[MAXHOSTNAMELEN] = "127.0.0.1"; //FIXME
socklen_t namelen;
AF_address_t address;
#ifdef HAVE_GETHOSTNAME
if (gethostname (buff, MAXHOSTNAMELEN) == -1)
Sys_Error ("Net_GetLocalAddress: gethostname: %s", strerror (errno));
buff[MAXHOSTNAMELEN - 1] = 0;
#endif
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.s4.sin_port;
Sys_Printf ("IP address %s\n", NET_AdrToString (net_local_adr));
}
static void
NET_shutdown (void *data)
{
#ifdef _WIN32
closesocket (net_socket);
WSACleanup ();
#else
close (net_socket);
#endif
}
void
NET_Init (int port)
{
#ifdef _WIN32
int r;
WORD wVersionRequested;
wVersionRequested = MAKEWORD (1, 1);
r = WSAStartup (wVersionRequested, &winsockdata);
if (r)
Sys_Error ("Winsock initialization failed.");
#endif /* _WIN32 */
Sys_RegisterShutdown (NET_shutdown, 0);
net_socket = UDP_OpenSocket (port);
// init the message buffer
_net_message_message.maxsize = sizeof (net_message_buffer);
_net_message_message.data = net_message_buffer;
// determine my name & address
NET_GetLocalAddress ();
net_loopback_adr.ip[0] = 127;
net_loopback_adr.ip[3] = 1;
Sys_Printf ("UDP (IPv4) Initialized\n");
}
Reference in New Issue View Git Blame Copy Permalink