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quakequest/Projects/Android/jni/darkplaces/lhnet.c
Simon 17498c172b Some project restructuring
2021-02-02 22:53:37 +00:00

1419 lines
40 KiB
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// Written by Forest Hale 2003-06-15 and placed into public domain.
#ifdef WIN32
#ifdef _MSC_VER
#pragma comment(lib, "ws2_32.lib")
#endif
# ifdef SUPPORTIPV6
// Windows XP or higher is required for getaddrinfo, but the inclusion of wspiapi provides fallbacks for older versions
# define _WIN32_WINNT 0x0501
# endif
# include <winsock2.h>
# include <ws2tcpip.h>
# ifdef USE_WSPIAPI_H
# include <wspiapi.h>
# endif
#endif
#ifndef STANDALONETEST
#include "quakedef.h"
#endif
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <string.h>
#ifndef WIN32
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#ifdef SUPPORTIPV6
#include <net/if.h>
#endif
#endif
#ifdef __MORPHOS__
#include <proto/socket.h>
#endif
// for Z_Malloc/Z_Free in quake
#ifndef STANDALONETEST
#include "zone.h"
#include "sys.h"
#include "netconn.h"
#else
#define Con_Print printf
#define Con_Printf printf
#define Z_Malloc malloc
#define Z_Free free
#endif
#include "lhnet.h"
#if defined(WIN32)
#define EWOULDBLOCK WSAEWOULDBLOCK
#define ECONNREFUSED WSAECONNREFUSED
#define SOCKETERRNO WSAGetLastError()
#define IOC_VENDOR 0x18000000
#define _WSAIOW(x,y) (IOC_IN|(x)|(y))
#define SIO_UDP_CONNRESET _WSAIOW(IOC_VENDOR,12)
#define SOCKLEN_T int
#elif defined(__MORPHOS__)
#define ioctlsocket IoctlSocket
#define closesocket CloseSocket
#define SOCKETERRNO Errno()
#define SOCKLEN_T int
#else
#define ioctlsocket ioctl
#define closesocket close
#define SOCKETERRNO errno
#define SOCKLEN_T socklen_t
#endif
#ifdef MSG_DONTWAIT
#define LHNET_RECVFROM_FLAGS MSG_DONTWAIT
#define LHNET_SENDTO_FLAGS 0
#else
#define LHNET_RECVFROM_FLAGS 0
#define LHNET_SENDTO_FLAGS 0
#endif
typedef struct lhnetaddressnative_s
{
lhnetaddresstype_t addresstype;
int port;
union
{
struct sockaddr sock;
struct sockaddr_in in;
#ifdef SUPPORTIPV6
struct sockaddr_in6 in6;
#endif
}
addr;
}
lhnetaddressnative_t;
// to make LHNETADDRESS_FromString resolve repeated hostnames faster, cache them
#define MAX_NAMECACHE 64
static struct namecache_s
{
lhnetaddressnative_t address;
double expirationtime;
char name[64];
}
namecache[MAX_NAMECACHE];
static int namecacheposition = 0;
int LHNETADDRESS_FromPort(lhnetaddress_t *vaddress, lhnetaddresstype_t addresstype, int port)
{
lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
if (!address)
return 0;
switch(addresstype)
{
default:
break;
case LHNETADDRESSTYPE_LOOP:
// local:port (loopback)
memset(address, 0, sizeof(*address));
address->addresstype = LHNETADDRESSTYPE_LOOP;
address->port = port;
return 1;
case LHNETADDRESSTYPE_INET4:
// 0.0.0.0:port (INADDR_ANY, binds to all interfaces)
memset(address, 0, sizeof(*address));
address->addresstype = LHNETADDRESSTYPE_INET4;
address->port = port;
address->addr.in.sin_family = AF_INET;
address->addr.in.sin_port = htons((unsigned short)port);
return 1;
#ifdef SUPPORTIPV6
case LHNETADDRESSTYPE_INET6:
// [0:0:0:0:0:0:0:0]:port (IN6ADDR_ANY, binds to all interfaces)
memset(address, 0, sizeof(*address));
address->addresstype = LHNETADDRESSTYPE_INET6;
address->port = port;
address->addr.in6.sin6_family = AF_INET6;
address->addr.in6.sin6_port = htons((unsigned short)port);
return 1;
#endif
}
return 0;
}
#ifdef SUPPORTIPV6
static int LHNETADDRESS_Resolve(lhnetaddressnative_t *address, const char *name, int port)
{
char port_buff [16];
struct addrinfo hints;
struct addrinfo* addrinf;
int err;
dpsnprintf (port_buff, sizeof (port_buff), "%d", port);
port_buff[sizeof (port_buff) - 1] = '\0';
memset(&hints, 0, sizeof (hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM;
//hints.ai_flags = AI_PASSIVE;
err = getaddrinfo(name, port_buff, &hints, &addrinf);
if (err != 0 || addrinf == NULL)
return 0;
if (addrinf->ai_addr->sa_family != AF_INET6 && addrinf->ai_addr->sa_family != AF_INET)
{
freeaddrinfo (addrinf);
return 0;
}
// great it worked
if (addrinf->ai_addr->sa_family == AF_INET6)
{
address->addresstype = LHNETADDRESSTYPE_INET6;
memcpy(&address->addr.in6, addrinf->ai_addr, sizeof(address->addr.in6));
}
else
{
address->addresstype = LHNETADDRESSTYPE_INET4;
memcpy(&address->addr.in, addrinf->ai_addr, sizeof(address->addr.in));
}
address->port = port;
freeaddrinfo (addrinf);
return 1;
}
int LHNETADDRESS_FromString(lhnetaddress_t *vaddress, const char *string, int defaultport)
{
lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
int i, port, d1, d2, d3, d4, resolved;
size_t namelen;
unsigned char *a;
char name[128];
#ifdef STANDALONETEST
char string2[128];
#endif
const char* addr_start;
const char* addr_end = NULL;
const char* port_name = NULL;
int addr_family = AF_UNSPEC;
if (!address || !string || !*string)
return 0;
memset(address, 0, sizeof(*address));
address->addresstype = LHNETADDRESSTYPE_NONE;
port = 0;
// If it's a bracketed IPv6 address
if (string[0] == '[')
{
const char* end_bracket = strchr(string, ']');
if (end_bracket == NULL)
return 0;
if (end_bracket[1] == ':')
port_name = end_bracket + 2;
else if (end_bracket[1] != '\0')
return 0;
addr_family = AF_INET6;
addr_start = &string[1];
addr_end = end_bracket;
}
else
{
const char* first_colon;
addr_start = string;
// If it's a numeric non-bracket IPv6 address (-> no port),
// or it's a numeric IPv4 address, or a name, with a port
first_colon = strchr(string, ':');
if (first_colon != NULL)
{
const char* last_colon = strrchr(first_colon + 1, ':');
// If it's an numeric IPv4 address, or a name, with a port
if (last_colon == NULL)
{
addr_end = first_colon;
port_name = first_colon + 1;
}
else
addr_family = AF_INET6;
}
}
if (addr_end != NULL)
namelen = addr_end - addr_start;
else
namelen = strlen (addr_start);
if (namelen >= sizeof(name))
namelen = sizeof(name) - 1;
memcpy (name, addr_start, namelen);
name[namelen] = 0;
if (port_name)
port = atoi(port_name);
if (port == 0)
port = defaultport;
// handle loopback
if (!strcmp(name, "local"))
{
address->addresstype = LHNETADDRESSTYPE_LOOP;
address->port = port;
return 1;
}
// try to parse as dotted decimal ipv4 address first
// note this supports partial ip addresses
d1 = d2 = d3 = d4 = 0;
#if _MSC_VER >= 1400
#define sscanf sscanf_s
#endif
if (addr_family != AF_INET6 &&
sscanf(name, "%d.%d.%d.%d", &d1, &d2, &d3, &d4) >= 1 && (unsigned int)d1 < 256 && (unsigned int)d2 < 256 && (unsigned int)d3 < 256 && (unsigned int)d4 < 256)
{
// parsed a valid ipv4 address
address->addresstype = LHNETADDRESSTYPE_INET4;
address->port = port;
address->addr.in.sin_family = AF_INET;
address->addr.in.sin_port = htons((unsigned short)port);
a = (unsigned char *)&address->addr.in.sin_addr;
a[0] = d1;
a[1] = d2;
a[2] = d3;
a[3] = d4;
#ifdef STANDALONETEST
LHNETADDRESS_ToString(address, string2, sizeof(string2), 1);
printf("manual parsing of ipv4 dotted decimal address \"%s\" successful: %s\n", string, string2);
#endif
return 1;
}
for (i = 0;i < MAX_NAMECACHE;i++)
if (!strcmp(namecache[i].name, name))
break;
#ifdef STANDALONETEST
if (i < MAX_NAMECACHE)
#else
if (i < MAX_NAMECACHE && realtime < namecache[i].expirationtime)
#endif
{
*address = namecache[i].address;
address->port = port;
if (address->addresstype == LHNETADDRESSTYPE_INET6)
{
address->addr.in6.sin6_port = htons((unsigned short)port);
return 1;
}
else if (address->addresstype == LHNETADDRESSTYPE_INET4)
{
address->addr.in.sin_port = htons((unsigned short)port);
return 1;
}
return 0;
}
for (i = 0;i < (int)sizeof(namecache[namecacheposition].name)-1 && name[i];i++)
namecache[namecacheposition].name[i] = name[i];
namecache[namecacheposition].name[i] = 0;
#ifndef STANDALONETEST
namecache[namecacheposition].expirationtime = realtime + 12 * 3600; // 12 hours
#endif
// try resolving the address (handles dns and other ip formats)
resolved = LHNETADDRESS_Resolve(address, name, port);
if (resolved)
{
#ifdef STANDALONETEST
const char *protoname;
switch (address->addresstype)
{
case LHNETADDRESSTYPE_INET6:
protoname = "ipv6";
break;
case LHNETADDRESSTYPE_INET4:
protoname = "ipv4";
break;
default:
protoname = "UNKNOWN";
break;
}
LHNETADDRESS_ToString(vaddress, string2, sizeof(string2), 1);
Con_Printf("LHNETADDRESS_Resolve(\"%s\") returned %s address %s\n", string, protoname, string2);
#endif
namecache[namecacheposition].address = *address;
}
else
{
#ifdef STANDALONETEST
printf("name resolution failed on address \"%s\"\n", name);
#endif
namecache[namecacheposition].address.addresstype = LHNETADDRESSTYPE_NONE;
}
namecacheposition = (namecacheposition + 1) % MAX_NAMECACHE;
return resolved;
}
#else
int LHNETADDRESS_FromString(lhnetaddress_t *vaddress, const char *string, int defaultport)
{
lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
int i, port, namelen, d1, d2, d3, d4;
struct hostent *hostentry;
unsigned char *a;
const char *colon;
char name[128];
#ifdef STANDALONETEST
char string2[128];
#endif
if (!address || !string || !*string)
return 0;
memset(address, 0, sizeof(*address));
address->addresstype = LHNETADDRESSTYPE_NONE;
port = 0;
colon = strrchr(string, ':');
if (colon && (colon == strchr(string, ':') || (string[0] == '[' && colon - string > 0 && colon[-1] == ']')))
// EITHER: colon is the ONLY colon OR: colon comes after [...] delimited IPv6 address
// fixes misparsing of IPv6 addresses without port
{
port = atoi(colon + 1);
}
else
colon = string + strlen(string);
if (port == 0)
port = defaultport;
namelen = colon - string;
if (namelen > 127)
namelen = 127;
if (string[0] == '[' && namelen > 0 && string[namelen-1] == ']') // ipv6
{
string++;
namelen -= 2;
}
memcpy(name, string, namelen);
name[namelen] = 0;
// handle loopback
if (!strcmp(name, "local"))
{
address->addresstype = LHNETADDRESSTYPE_LOOP;
address->port = port;
return 1;
}
// try to parse as dotted decimal ipv4 address first
// note this supports partial ip addresses
d1 = d2 = d3 = d4 = 0;
#if _MSC_VER >= 1400
#define sscanf sscanf_s
#endif
if (sscanf(name, "%d.%d.%d.%d", &d1, &d2, &d3, &d4) >= 1 && (unsigned int)d1 < 256 && (unsigned int)d2 < 256 && (unsigned int)d3 < 256 && (unsigned int)d4 < 256)
{
// parsed a valid ipv4 address
address->addresstype = LHNETADDRESSTYPE_INET4;
address->port = port;
address->addr.in.sin_family = AF_INET;
address->addr.in.sin_port = htons((unsigned short)port);
a = (unsigned char *)&address->addr.in.sin_addr;
a[0] = d1;
a[1] = d2;
a[2] = d3;
a[3] = d4;
#ifdef STANDALONETEST
LHNETADDRESS_ToString(address, string2, sizeof(string2), 1);
printf("manual parsing of ipv4 dotted decimal address \"%s\" successful: %s\n", string, string2);
#endif
return 1;
}
for (i = 0;i < MAX_NAMECACHE;i++)
if (!strcmp(namecache[i].name, name))
break;
#ifdef STANDALONETEST
if (i < MAX_NAMECACHE)
#else
if (i < MAX_NAMECACHE && realtime < namecache[i].expirationtime)
#endif
{
*address = namecache[i].address;
address->port = port;
if (address->addresstype == LHNETADDRESSTYPE_INET6)
{
#ifdef SUPPORTIPV6
address->addr.in6.sin6_port = htons((unsigned short)port);
return 1;
#endif
}
else if (address->addresstype == LHNETADDRESSTYPE_INET4)
{
address->addr.in.sin_port = htons((unsigned short)port);
return 1;
}
return 0;
}
// try gethostbyname (handles dns and other ip formats)
hostentry = gethostbyname(name);
if (hostentry)
{
if (hostentry->h_addrtype == AF_INET6)
{
#ifdef SUPPORTIPV6
// great it worked
address->addresstype = LHNETADDRESSTYPE_INET6;
address->port = port;
address->addr.in6.sin6_family = hostentry->h_addrtype;
address->addr.in6.sin6_port = htons((unsigned short)port);
memcpy(&address->addr.in6.sin6_addr, hostentry->h_addr_list[0], sizeof(address->addr.in6.sin6_addr));
for (i = 0;i < (int)sizeof(namecache[namecacheposition].name)-1 && name[i];i++)
namecache[namecacheposition].name[i] = name[i];
namecache[namecacheposition].name[i] = 0;
#ifndef STANDALONETEST
namecache[namecacheposition].expirationtime = realtime + 12 * 3600; // 12 hours
#endif
namecache[namecacheposition].address = *address;
namecacheposition = (namecacheposition + 1) % MAX_NAMECACHE;
#ifdef STANDALONETEST
LHNETADDRESS_ToString(address, string2, sizeof(string2), 1);
printf("gethostbyname(\"%s\") returned ipv6 address %s\n", string, string2);
#endif
return 1;
#endif
}
else if (hostentry->h_addrtype == AF_INET)
{
// great it worked
address->addresstype = LHNETADDRESSTYPE_INET4;
address->port = port;
address->addr.in.sin_family = hostentry->h_addrtype;
address->addr.in.sin_port = htons((unsigned short)port);
memcpy(&address->addr.in.sin_addr, hostentry->h_addr_list[0], sizeof(address->addr.in.sin_addr));
for (i = 0;i < (int)sizeof(namecache[namecacheposition].name)-1 && name[i];i++)
namecache[namecacheposition].name[i] = name[i];
namecache[namecacheposition].name[i] = 0;
#ifndef STANDALONETEST
namecache[namecacheposition].expirationtime = realtime + 12 * 3600; // 12 hours
#endif
namecache[namecacheposition].address = *address;
namecacheposition = (namecacheposition + 1) % MAX_NAMECACHE;
#ifdef STANDALONETEST
LHNETADDRESS_ToString(address, string2, sizeof(string2), 1);
printf("gethostbyname(\"%s\") returned ipv4 address %s\n", string, string2);
#endif
return 1;
}
}
#ifdef STANDALONETEST
printf("gethostbyname failed on address \"%s\"\n", name);
#endif
for (i = 0;i < (int)sizeof(namecache[namecacheposition].name)-1 && name[i];i++)
namecache[namecacheposition].name[i] = name[i];
namecache[namecacheposition].name[i] = 0;
#ifndef STANDALONETEST
namecache[namecacheposition].expirationtime = realtime + 12 * 3600; // 12 hours
#endif
namecache[namecacheposition].address.addresstype = LHNETADDRESSTYPE_NONE;
namecacheposition = (namecacheposition + 1) % MAX_NAMECACHE;
return 0;
}
#endif
int LHNETADDRESS_ToString(const lhnetaddress_t *vaddress, char *string, int stringbuffersize, int includeport)
{
lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
const unsigned char *a;
*string = 0;
if (!address || !string || stringbuffersize < 1)
return 0;
switch(address->addresstype)
{
default:
break;
case LHNETADDRESSTYPE_LOOP:
if (includeport)
{
if (stringbuffersize >= 12)
{
dpsnprintf(string, stringbuffersize, "local:%d", address->port);
return 1;
}
}
else
{
if (stringbuffersize >= 6)
{
memcpy(string, "local", 6);
return 1;
}
}
break;
case LHNETADDRESSTYPE_INET4:
a = (const unsigned char *)(&address->addr.in.sin_addr);
if (includeport)
{
if (stringbuffersize >= 22)
{
dpsnprintf(string, stringbuffersize, "%d.%d.%d.%d:%d", a[0], a[1], a[2], a[3], address->port);
return 1;
}
}
else
{
if (stringbuffersize >= 16)
{
dpsnprintf(string, stringbuffersize, "%d.%d.%d.%d", a[0], a[1], a[2], a[3]);
return 1;
}
}
break;
#ifdef SUPPORTIPV6
case LHNETADDRESSTYPE_INET6:
a = (const unsigned char *)(&address->addr.in6.sin6_addr);
if (includeport)
{
if (stringbuffersize >= 88)
{
dpsnprintf(string, stringbuffersize, "[%x:%x:%x:%x:%x:%x:%x:%x]:%d", a[0] * 256 + a[1], a[2] * 256 + a[3], a[4] * 256 + a[5], a[6] * 256 + a[7], a[8] * 256 + a[9], a[10] * 256 + a[11], a[12] * 256 + a[13], a[14] * 256 + a[15], address->port);
return 1;
}
}
else
{
if (stringbuffersize >= 80)
{
dpsnprintf(string, stringbuffersize, "%x:%x:%x:%x:%x:%x:%x:%x", a[0] * 256 + a[1], a[2] * 256 + a[3], a[4] * 256 + a[5], a[6] * 256 + a[7], a[8] * 256 + a[9], a[10] * 256 + a[11], a[12] * 256 + a[13], a[14] * 256 + a[15]);
return 1;
}
}
break;
#endif
}
return 0;
}
int LHNETADDRESS_GetAddressType(const lhnetaddress_t *address)
{
if (address)
return address->addresstype;
else
return LHNETADDRESSTYPE_NONE;
}
const char *LHNETADDRESS_GetInterfaceName(const lhnetaddress_t *vaddress, char *ifname, size_t ifnamelength)
{
#ifdef SUPPORTIPV6
lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
if (address && address->addresstype == LHNETADDRESSTYPE_INET6)
{
#ifndef _WIN32
if (if_indextoname(address->addr.in6.sin6_scope_id, ifname) == ifname)
return ifname;
#else
// The Win32 API doesn't have if_indextoname() until Windows Vista,
// but luckily it just uses the interface ID as the interface name
if (dpsnprintf(ifname, ifnamelength, "%lu", address->addr.in6.sin6_scope_id) > 0)
return ifname;
#endif
}
#endif
return NULL;
}
int LHNETADDRESS_GetPort(const lhnetaddress_t *address)
{
if (!address)
return -1;
return address->port;
}
int LHNETADDRESS_SetPort(lhnetaddress_t *vaddress, int port)
{
lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
if (!address)
return 0;
address->port = port;
switch(address->addresstype)
{
case LHNETADDRESSTYPE_LOOP:
return 1;
case LHNETADDRESSTYPE_INET4:
address->addr.in.sin_port = htons((unsigned short)port);
return 1;
#ifdef SUPPORTIPV6
case LHNETADDRESSTYPE_INET6:
address->addr.in6.sin6_port = htons((unsigned short)port);
return 1;
#endif
default:
return 0;
}
}
int LHNETADDRESS_Compare(const lhnetaddress_t *vaddress1, const lhnetaddress_t *vaddress2)
{
lhnetaddressnative_t *address1 = (lhnetaddressnative_t *)vaddress1;
lhnetaddressnative_t *address2 = (lhnetaddressnative_t *)vaddress2;
if (!address1 || !address2)
return 1;
if (address1->addresstype != address2->addresstype)
return 1;
switch(address1->addresstype)
{
case LHNETADDRESSTYPE_LOOP:
if (address1->port != address2->port)
return -1;
return 0;
case LHNETADDRESSTYPE_INET4:
if (address1->addr.in.sin_family != address2->addr.in.sin_family)
return 1;
if (memcmp(&address1->addr.in.sin_addr, &address2->addr.in.sin_addr, sizeof(address1->addr.in.sin_addr)))
return 1;
if (address1->port != address2->port)
return -1;
return 0;
#ifdef SUPPORTIPV6
case LHNETADDRESSTYPE_INET6:
if (address1->addr.in6.sin6_family != address2->addr.in6.sin6_family)
return 1;
if (memcmp(&address1->addr.in6.sin6_addr, &address2->addr.in6.sin6_addr, sizeof(address1->addr.in6.sin6_addr)))
return 1;
if (address1->port != address2->port)
return -1;
return 0;
#endif
default:
return 1;
}
}
typedef struct lhnetpacket_s
{
void *data;
int length;
int sourceport;
int destinationport;
time_t timeout;
#ifndef STANDALONETEST
double sentdoubletime;
#endif
struct lhnetpacket_s *next, *prev;
}
lhnetpacket_t;
static int lhnet_active;
static lhnetsocket_t lhnet_socketlist;
static lhnetpacket_t lhnet_packetlist;
static int lhnet_default_dscp = 0;
#ifdef WIN32
static int lhnet_didWSAStartup = 0;
static WSADATA lhnet_winsockdata;
#endif
void LHNET_Init(void)
{
if (lhnet_active)
return;
lhnet_socketlist.next = lhnet_socketlist.prev = &lhnet_socketlist;
lhnet_packetlist.next = lhnet_packetlist.prev = &lhnet_packetlist;
lhnet_active = 1;
#ifdef WIN32
lhnet_didWSAStartup = !WSAStartup(MAKEWORD(1, 1), &lhnet_winsockdata);
if (!lhnet_didWSAStartup)
Con_Print("LHNET_Init: WSAStartup failed, networking disabled\n");
#endif
}
int LHNET_DefaultDSCP(int dscp)
{
#ifdef IP_TOS
int prev = lhnet_default_dscp;
if(dscp >= 0)
lhnet_default_dscp = dscp;
return prev;
#else
return -1;
#endif
}
void LHNET_Shutdown(void)
{
lhnetpacket_t *p;
if (!lhnet_active)
return;
while (lhnet_socketlist.next != &lhnet_socketlist)
LHNET_CloseSocket(lhnet_socketlist.next);
while (lhnet_packetlist.next != &lhnet_packetlist)
{
p = lhnet_packetlist.next;
p->prev->next = p->next;
p->next->prev = p->prev;
Z_Free(p);
}
#ifdef WIN32
if (lhnet_didWSAStartup)
{
lhnet_didWSAStartup = 0;
WSACleanup();
}
#endif
lhnet_active = 0;
}
static const char *LHNETPRIVATE_StrError(void)
{
#ifdef WIN32
int i = WSAGetLastError();
switch (i)
{
case WSAEINTR: return "WSAEINTR";
case WSAEBADF: return "WSAEBADF";
case WSAEACCES: return "WSAEACCES";
case WSAEFAULT: return "WSAEFAULT";
case WSAEINVAL: return "WSAEINVAL";
case WSAEMFILE: return "WSAEMFILE";
case WSAEWOULDBLOCK: return "WSAEWOULDBLOCK";
case WSAEINPROGRESS: return "WSAEINPROGRESS";
case WSAEALREADY: return "WSAEALREADY";
case WSAENOTSOCK: return "WSAENOTSOCK";
case WSAEDESTADDRREQ: return "WSAEDESTADDRREQ";
case WSAEMSGSIZE: return "WSAEMSGSIZE";
case WSAEPROTOTYPE: return "WSAEPROTOTYPE";
case WSAENOPROTOOPT: return "WSAENOPROTOOPT";
case WSAEPROTONOSUPPORT: return "WSAEPROTONOSUPPORT";
case WSAESOCKTNOSUPPORT: return "WSAESOCKTNOSUPPORT";
case WSAEOPNOTSUPP: return "WSAEOPNOTSUPP";
case WSAEPFNOSUPPORT: return "WSAEPFNOSUPPORT";
case WSAEAFNOSUPPORT: return "WSAEAFNOSUPPORT";
case WSAEADDRINUSE: return "WSAEADDRINUSE";
case WSAEADDRNOTAVAIL: return "WSAEADDRNOTAVAIL";
case WSAENETDOWN: return "WSAENETDOWN";
case WSAENETUNREACH: return "WSAENETUNREACH";
case WSAENETRESET: return "WSAENETRESET";
case WSAECONNABORTED: return "WSAECONNABORTED";
case WSAECONNRESET: return "WSAECONNRESET";
case WSAENOBUFS: return "WSAENOBUFS";
case WSAEISCONN: return "WSAEISCONN";
case WSAENOTCONN: return "WSAENOTCONN";
case WSAESHUTDOWN: return "WSAESHUTDOWN";
case WSAETOOMANYREFS: return "WSAETOOMANYREFS";
case WSAETIMEDOUT: return "WSAETIMEDOUT";
case WSAECONNREFUSED: return "WSAECONNREFUSED";
case WSAELOOP: return "WSAELOOP";
case WSAENAMETOOLONG: return "WSAENAMETOOLONG";
case WSAEHOSTDOWN: return "WSAEHOSTDOWN";
case WSAEHOSTUNREACH: return "WSAEHOSTUNREACH";
case WSAENOTEMPTY: return "WSAENOTEMPTY";
case WSAEPROCLIM: return "WSAEPROCLIM";
case WSAEUSERS: return "WSAEUSERS";
case WSAEDQUOT: return "WSAEDQUOT";
case WSAESTALE: return "WSAESTALE";
case WSAEREMOTE: return "WSAEREMOTE";
case WSAEDISCON: return "WSAEDISCON";
case 0: return "no error";
default: return "unknown WSAE error";
}
#else
return strerror(errno);
#endif
}
void LHNET_SleepUntilPacket_Microseconds(int microseconds)
{
#ifdef FD_SET
fd_set fdreadset;
struct timeval tv;
int lastfd;
lhnetsocket_t *s;
FD_ZERO(&fdreadset);
lastfd = 0;
for (s = lhnet_socketlist.next;s != &lhnet_socketlist;s = s->next)
{
if (s->address.addresstype == LHNETADDRESSTYPE_INET4 || s->address.addresstype == LHNETADDRESSTYPE_INET6)
{
if (lastfd < s->inetsocket)
lastfd = s->inetsocket;
#if defined(WIN32) && !defined(_MSC_VER)
FD_SET((int)s->inetsocket, &fdreadset);
#else
FD_SET((unsigned int)s->inetsocket, &fdreadset);
#endif
}
}
tv.tv_sec = microseconds / 1000000;
tv.tv_usec = microseconds % 1000000;
select(lastfd + 1, &fdreadset, NULL, NULL, &tv);
#else
Sys_Sleep(microseconds);
#endif
}
lhnetsocket_t *LHNET_OpenSocket_Connectionless(lhnetaddress_t *address)
{
lhnetsocket_t *lhnetsocket, *s;
if (!address)
return NULL;
lhnetsocket = (lhnetsocket_t *)Z_Malloc(sizeof(*lhnetsocket));
if (lhnetsocket)
{
memset(lhnetsocket, 0, sizeof(*lhnetsocket));
lhnetsocket->address = *address;
switch(lhnetsocket->address.addresstype)
{
case LHNETADDRESSTYPE_LOOP:
if (lhnetsocket->address.port == 0)
{
// allocate a port dynamically
// this search will always terminate because there is never
// an allocated socket with port 0, so if the number wraps it
// will find the port is unused, and then refuse to use port
// 0, causing an intentional failure condition
lhnetsocket->address.port = 1024;
for (;;)
{
for (s = lhnet_socketlist.next;s != &lhnet_socketlist;s = s->next)
if (s->address.addresstype == lhnetsocket->address.addresstype && s->address.port == lhnetsocket->address.port)
break;
if (s == &lhnet_socketlist)
break;
lhnetsocket->address.port++;
}
}
// check if the port is available
for (s = lhnet_socketlist.next;s != &lhnet_socketlist;s = s->next)
if (s->address.addresstype == lhnetsocket->address.addresstype && s->address.port == lhnetsocket->address.port)
break;
if (s == &lhnet_socketlist && lhnetsocket->address.port != 0)
{
lhnetsocket->next = &lhnet_socketlist;
lhnetsocket->prev = lhnetsocket->next->prev;
lhnetsocket->next->prev = lhnetsocket;
lhnetsocket->prev->next = lhnetsocket;
return lhnetsocket;
}
break;
case LHNETADDRESSTYPE_INET4:
#ifdef SUPPORTIPV6
case LHNETADDRESSTYPE_INET6:
#endif
#ifdef WIN32
if (lhnet_didWSAStartup)
{
#endif
#ifdef SUPPORTIPV6
if ((lhnetsocket->inetsocket = socket(address->addresstype == LHNETADDRESSTYPE_INET6 ? PF_INET6 : PF_INET, SOCK_DGRAM, IPPROTO_UDP)) != -1)
#else
if ((lhnetsocket->inetsocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) != -1)
#endif
{
#ifdef WIN32
u_long _false = 0;
#endif
#ifdef MSG_DONTWAIT
if (1)
#else
#ifdef WIN32
u_long _true = 1;
#else
char _true = 1;
#endif
if (ioctlsocket(lhnetsocket->inetsocket, FIONBIO, &_true) != -1)
#endif
{
#ifdef IPV6_V6ONLY
// We need to set this flag to tell the OS that we only listen on IPv6. If we don't
// most OSes will create a dual-protocol socket that also listens on IPv4. In this case
// if an IPv4 socket is already bound to the port we want, our bind() call will fail.
int ipv6_only = 1;
if (address->addresstype != LHNETADDRESSTYPE_INET6
|| setsockopt (lhnetsocket->inetsocket, IPPROTO_IPV6, IPV6_V6ONLY,
(const char *)&ipv6_only, sizeof(ipv6_only)) == 0
#ifdef WIN32
// The Win32 API only supports IPV6_V6ONLY since Windows Vista, but fortunately
// the default value is what we want on Win32 anyway (IPV6_V6ONLY = true)
|| SOCKETERRNO == WSAENOPROTOOPT
#endif
)
#endif
{
lhnetaddressnative_t *localaddress = (lhnetaddressnative_t *)&lhnetsocket->address;
SOCKLEN_T namelen;
int bindresult;
#if defined(SOL_RFC1149) && defined(RFC1149_1149ONLY)
// we got reports of massive lags when this protocol was chosen as transport
// so better turn it off
{
int rfc1149only = 0;
int rfc1149enabled = 0;
if(setsockopt(lhnetsocket->inetsocket, SOL_RFC1149, RFC1149_1149ONLY, &rfc1149only))
Con_Printf("LHNET_OpenSocket_Connectionless: warning: setsockopt(RFC1149_1149ONLY) returned error: %s\n", LHNETPRIVATE_StrError());
if(setsockopt(lhnetsocket->inetsocket, SOL_RFC1149, RFC1149_ENABLED, &rfc1149enabled))
Con_Printf("LHNET_OpenSocket_Connectionless: warning: setsockopt(RFC1149_ENABLED) returned error: %s\n", LHNETPRIVATE_StrError());
}
#endif
#ifdef SUPPORTIPV6
if (address->addresstype == LHNETADDRESSTYPE_INET6)
{
namelen = sizeof(localaddress->addr.in6);
bindresult = bind(lhnetsocket->inetsocket, &localaddress->addr.sock, namelen);
if (bindresult != -1)
getsockname(lhnetsocket->inetsocket, &localaddress->addr.sock, &namelen);
}
else
#endif
{
namelen = sizeof(localaddress->addr.in);
bindresult = bind(lhnetsocket->inetsocket, &localaddress->addr.sock, namelen);
if (bindresult != -1)
getsockname(lhnetsocket->inetsocket, &localaddress->addr.sock, &namelen);
}
if (bindresult != -1)
{
int i = 1;
// enable broadcast on this socket
setsockopt(lhnetsocket->inetsocket, SOL_SOCKET, SO_BROADCAST, (char *)&i, sizeof(i));
#ifdef IP_TOS
{
// enable DSCP for ToS support
int tos = lhnet_default_dscp << 2;
setsockopt(lhnetsocket->inetsocket, IPPROTO_IP, IP_TOS, (char *) &tos, sizeof(tos));
}
#endif
lhnetsocket->next = &lhnet_socketlist;
lhnetsocket->prev = lhnetsocket->next->prev;
lhnetsocket->next->prev = lhnetsocket;
lhnetsocket->prev->next = lhnetsocket;
#ifdef WIN32
if (ioctlsocket(lhnetsocket->inetsocket, SIO_UDP_CONNRESET, &_false) == -1)
Con_DPrintf("LHNET_OpenSocket_Connectionless: ioctlsocket SIO_UDP_CONNRESET returned error: %s\n", LHNETPRIVATE_StrError());
#endif
return lhnetsocket;
}
else
Con_Printf("LHNET_OpenSocket_Connectionless: bind returned error: %s\n", LHNETPRIVATE_StrError());
}
#ifdef IPV6_V6ONLY
else
Con_Printf("LHNET_OpenSocket_Connectionless: setsockopt(IPV6_V6ONLY) returned error: %s\n", LHNETPRIVATE_StrError());
#endif
}
else
Con_Printf("LHNET_OpenSocket_Connectionless: ioctlsocket returned error: %s\n", LHNETPRIVATE_StrError());
closesocket(lhnetsocket->inetsocket);
}
else
Con_Printf("LHNET_OpenSocket_Connectionless: socket returned error: %s\n", LHNETPRIVATE_StrError());
#ifdef WIN32
}
else
Con_Print("LHNET_OpenSocket_Connectionless: can't open a socket (WSAStartup failed during LHNET_Init)\n");
#endif
break;
default:
break;
}
Z_Free(lhnetsocket);
}
return NULL;
}
void LHNET_CloseSocket(lhnetsocket_t *lhnetsocket)
{
if (lhnetsocket)
{
// unlink from socket list
if (lhnetsocket->next == NULL)
return; // invalid!
lhnetsocket->next->prev = lhnetsocket->prev;
lhnetsocket->prev->next = lhnetsocket->next;
lhnetsocket->next = NULL;
lhnetsocket->prev = NULL;
// no special close code for loopback, just inet
if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET4 || lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET6)
{
closesocket(lhnetsocket->inetsocket);
}
Z_Free(lhnetsocket);
}
}
lhnetaddress_t *LHNET_AddressFromSocket(lhnetsocket_t *sock)
{
if (sock)
return &sock->address;
else
return NULL;
}
int LHNET_Read(lhnetsocket_t *lhnetsocket, void *content, int maxcontentlength, lhnetaddress_t *vaddress)
{
lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
int value = 0;
if (!lhnetsocket || !address || !content || maxcontentlength < 1)
return -1;
if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_LOOP)
{
time_t currenttime;
lhnetpacket_t *p, *pnext;
// scan for any old packets to timeout while searching for a packet
// that is waiting to be delivered to this socket
currenttime = time(NULL);
for (p = lhnet_packetlist.next;p != &lhnet_packetlist;p = pnext)
{
pnext = p->next;
if (p->timeout < currenttime)
{
// unlink and free
p->next->prev = p->prev;
p->prev->next = p->next;
Z_Free(p);
continue;
}
#ifndef STANDALONETEST
if (cl_netlocalping.value && (realtime - cl_netlocalping.value * (1.0 / 2000.0)) < p->sentdoubletime)
continue;
#endif
if (value == 0 && p->destinationport == lhnetsocket->address.port)
{
if (p->length <= maxcontentlength)
{
lhnetaddressnative_t *localaddress = (lhnetaddressnative_t *)&lhnetsocket->address;
*address = *localaddress;
address->port = p->sourceport;
memcpy(content, p->data, p->length);
value = p->length;
}
else
value = -1;
// unlink and free
p->next->prev = p->prev;
p->prev->next = p->next;
Z_Free(p);
}
}
}
else if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET4)
{
SOCKLEN_T inetaddresslength;
address->addresstype = LHNETADDRESSTYPE_NONE;
inetaddresslength = sizeof(address->addr.in);
value = recvfrom(lhnetsocket->inetsocket, (char *)content, maxcontentlength, LHNET_RECVFROM_FLAGS, &address->addr.sock, &inetaddresslength);
if (value > 0)
{
address->addresstype = LHNETADDRESSTYPE_INET4;
address->port = ntohs(address->addr.in.sin_port);
return value;
}
else if (value < 0)
{
int e = SOCKETERRNO;
if (e == EWOULDBLOCK)
return 0;
switch (e)
{
case ECONNREFUSED:
Con_Print("Connection refused\n");
return 0;
}
Con_DPrintf("LHNET_Read: recvfrom returned error: %s\n", LHNETPRIVATE_StrError());
}
}
#ifdef SUPPORTIPV6
else if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET6)
{
SOCKLEN_T inetaddresslength;
address->addresstype = LHNETADDRESSTYPE_NONE;
inetaddresslength = sizeof(address->addr.in6);
value = recvfrom(lhnetsocket->inetsocket, (char *)content, maxcontentlength, LHNET_RECVFROM_FLAGS, &address->addr.sock, &inetaddresslength);
if (value > 0)
{
address->addresstype = LHNETADDRESSTYPE_INET6;
address->port = ntohs(address->addr.in6.sin6_port);
return value;
}
else if (value == -1)
{
int e = SOCKETERRNO;
if (e == EWOULDBLOCK)
return 0;
switch (e)
{
case ECONNREFUSED:
Con_Print("Connection refused\n");
return 0;
}
Con_DPrintf("LHNET_Read: recvfrom returned error: %s\n", LHNETPRIVATE_StrError());
}
}
#endif
return value;
}
int LHNET_Write(lhnetsocket_t *lhnetsocket, const void *content, int contentlength, const lhnetaddress_t *vaddress)
{
lhnetaddressnative_t *address = (lhnetaddressnative_t *)vaddress;
int value = -1;
if (!lhnetsocket || !address || !content || contentlength < 1)
return -1;
if (lhnetsocket->address.addresstype != address->addresstype)
return -1;
if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_LOOP)
{
lhnetpacket_t *p;
p = (lhnetpacket_t *)Z_Malloc(sizeof(*p) + contentlength);
p->data = (void *)(p + 1);
memcpy(p->data, content, contentlength);
p->length = contentlength;
p->sourceport = lhnetsocket->address.port;
p->destinationport = address->port;
p->timeout = time(NULL) + 10;
p->next = &lhnet_packetlist;
p->prev = p->next->prev;
p->next->prev = p;
p->prev->next = p;
#ifndef STANDALONETEST
p->sentdoubletime = realtime;
#endif
value = contentlength;
}
else if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET4)
{
value = sendto(lhnetsocket->inetsocket, (char *)content, contentlength, LHNET_SENDTO_FLAGS, (struct sockaddr *)&address->addr.in, sizeof(struct sockaddr_in));
if (value == -1)
{
if (SOCKETERRNO == EWOULDBLOCK)
return 0;
Con_DPrintf("LHNET_Write: sendto returned error: %s\n", LHNETPRIVATE_StrError());
}
}
#ifdef SUPPORTIPV6
else if (lhnetsocket->address.addresstype == LHNETADDRESSTYPE_INET6)
{
value = sendto(lhnetsocket->inetsocket, (char *)content, contentlength, 0, (struct sockaddr *)&address->addr.in6, sizeof(struct sockaddr_in6));
if (value == -1)
{
if (SOCKETERRNO == EWOULDBLOCK)
return 0;
Con_DPrintf("LHNET_Write: sendto returned error: %s\n", LHNETPRIVATE_StrError());
}
}
#endif
return value;
}
#ifdef STANDALONETEST
int main(int argc, char **argv)
{
#if 1
char *buffer = "test", buffer2[1024];
int blen = strlen(buffer);
int b2len = 1024;
lhnetsocket_t *sock1;
lhnetsocket_t *sock2;
lhnetaddress_t myaddy1;
lhnetaddress_t myaddy2;
lhnetaddress_t myaddy3;
lhnetaddress_t localhostaddy1;
lhnetaddress_t localhostaddy2;
int test1;
int test2;
printf("calling LHNET_Init\n");
LHNET_Init();
printf("calling LHNET_FromPort twice to create two local addresses\n");
LHNETADDRESS_FromPort(&myaddy1, LHNETADDRESSTYPE_INET4, 4000);
LHNETADDRESS_FromPort(&myaddy2, LHNETADDRESSTYPE_INET4, 4001);
LHNETADDRESS_FromString(&localhostaddy1, "127.0.0.1", 4000);
LHNETADDRESS_FromString(&localhostaddy2, "127.0.0.1", 4001);
printf("calling LHNET_OpenSocket_Connectionless twice to create two local sockets\n");
sock1 = LHNET_OpenSocket_Connectionless(&myaddy1);
sock2 = LHNET_OpenSocket_Connectionless(&myaddy2);
printf("calling LHNET_Write to send a packet from the first socket to the second socket\n");
test1 = LHNET_Write(sock1, buffer, blen, &localhostaddy2);
printf("sleeping briefly\n");
#ifdef WIN32
Sleep (100);
#else
usleep (100000);
#endif
printf("calling LHNET_Read on the second socket to read the packet sent from the first socket\n");
test2 = LHNET_Read(sock2, buffer2, b2len - 1, &myaddy3);
if (test2 > 0)
Con_Printf("socket to socket test succeeded\n");
else
Con_Printf("socket to socket test failed\n");
#ifdef WIN32
printf("press any key to exit\n");
getchar();
#endif
printf("calling LHNET_Shutdown\n");
LHNET_Shutdown();
printf("exiting\n");
return 0;
#else
lhnetsocket_t *sock[16], *sendsock;
int i;
int numsockets;
int count;
int length;
int port;
time_t oldtime;
time_t newtime;
char *sendmessage;
int sendmessagelength;
lhnetaddress_t destaddress;
lhnetaddress_t receiveaddress;
lhnetaddress_t sockaddress[16];
char buffer[1536], addressstring[128], addressstring2[128];
if ((argc == 2 || argc == 5) && (port = atoi(argv[1])) >= 1 && port < 65535)
{
printf("calling LHNET_Init()\n");
LHNET_Init();
numsockets = 0;
LHNETADDRESS_FromPort(&sockaddress[numsockets++], LHNETADDRESSTYPE_LOOP, port);
LHNETADDRESS_FromPort(&sockaddress[numsockets++], LHNETADDRESSTYPE_INET4, port);
LHNETADDRESS_FromPort(&sockaddress[numsockets++], LHNETADDRESSTYPE_INET6, port+1);
sendsock = NULL;
sendmessage = NULL;
sendmessagelength = 0;
for (i = 0;i < numsockets;i++)
{
LHNETADDRESS_ToString(&sockaddress[i], addressstring, sizeof(addressstring), 1);
printf("calling LHNET_OpenSocket_Connectionless(<%s>)\n", addressstring);
if ((sock[i] = LHNET_OpenSocket_Connectionless(&sockaddress[i])))
{
LHNETADDRESS_ToString(LHNET_AddressFromSocket(sock[i]), addressstring2, sizeof(addressstring2), 1);
printf("opened socket successfully (address \"%s\")\n", addressstring2);
}
else
{
printf("failed to open socket\n");
if (i == 0)
{
LHNET_Shutdown();
return -1;
}
}
}
count = 0;
if (argc == 5)
{
count = atoi(argv[2]);
if (LHNETADDRESS_FromString(&destaddress, argv[3], -1))
{
sendmessage = argv[4];
sendmessagelength = strlen(sendmessage);
sendsock = NULL;
for (i = 0;i < numsockets;i++)
if (sock[i] && LHNETADDRESS_GetAddressType(&destaddress) == LHNETADDRESS_GetAddressType(&sockaddress[i]))
sendsock = sock[i];
if (sendsock == NULL)
{
printf("Could not find an open socket matching the addresstype (%i) of destination address, switching to listen only mode\n", LHNETADDRESS_GetAddressType(&destaddress));
argc = 2;
}
}
else
{
printf("LHNETADDRESS_FromString did not like the address \"%s\", switching to listen only mode\n", argv[3]);
argc = 2;
}
}
printf("started, now listening for \"exit\" on the opened sockets\n");
oldtime = time(NULL);
for(;;)
{
#ifdef WIN32
Sleep(1);
#else
usleep(1);
#endif
for (i = 0;i < numsockets;i++)
{
if (sock[i])
{
length = LHNET_Read(sock[i], buffer, sizeof(buffer), &receiveaddress);
if (length < 0)
printf("localsock read error: length < 0");
else if (length > 0 && length < (int)sizeof(buffer))
{
buffer[length] = 0;
LHNETADDRESS_ToString(&receiveaddress, addressstring, sizeof(addressstring), 1);
LHNETADDRESS_ToString(LHNET_AddressFromSocket(sock[i]), addressstring2, sizeof(addressstring2), 1);
printf("received message \"%s\" from \"%s\" on socket \"%s\"\n", buffer, addressstring, addressstring2);
if (!strcmp(buffer, "exit"))
break;
}
}
}
if (i < numsockets)
break;
if (argc == 5 && count > 0)
{
newtime = time(NULL);
if (newtime != oldtime)
{
LHNETADDRESS_ToString(&destaddress, addressstring, sizeof(addressstring), 1);
LHNETADDRESS_ToString(LHNET_AddressFromSocket(sendsock), addressstring2, sizeof(addressstring2), 1);
printf("calling LHNET_Write(<%s>, \"%s\", %i, <%s>)\n", addressstring2, sendmessage, sendmessagelength, addressstring);
length = LHNET_Write(sendsock, sendmessage, sendmessagelength, &destaddress);
if (length == sendmessagelength)
printf("sent successfully\n");
else
printf("LH_Write failed, returned %i (length of message was %i)\n", length, strlen(argv[4]));
oldtime = newtime;
count--;
if (count <= 0)
printf("Done sending, still listening for \"exit\"\n");
}
}
}
for (i = 0;i < numsockets;i++)
{
if (sock[i])
{
LHNETADDRESS_ToString(LHNET_AddressFromSocket(sock[i]), addressstring2, sizeof(addressstring2), 1);
printf("calling LHNET_CloseSocket(<%s>)\n", addressstring2);
LHNET_CloseSocket(sock[i]);
}
}
printf("calling LHNET_Shutdown()\n");
LHNET_Shutdown();
return 0;
}
printf("Testing code for lhnet.c\nusage: lhnettest <localportnumber> [<sendnumberoftimes> <sendaddress:port> <sendmessage>]\n");
return -1;
#endif
}
#endif
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