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/*
Racket
Copyright (c) 2004-2013 PLT Design Inc.
Copyright (c) 2000-2001 Matthew Flatt
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301 USA.
libscheme
Copyright (c) 1994 Brent Benson
All rights reserved.
*/
/* This file implements the TCP and UDP interfaces. */
#include "schpriv.h"
#include <ctype.h>
#ifndef NO_TCP_SUPPORT
#ifdef USE_TCP
#ifdef UNISTD_INCLUDE
# include <unistd.h>
#endif
#ifdef USE_ULIMIT
# include <ulimit.h>
#endif
#ifdef FILES_HAVE_FDS
# include <sys/types.h>
# include <sys/time.h>
# ifdef BSTRING_INCLUDE
# include <bstring.h>
# endif
# ifdef SELECT_INCLUDE
# include <sys/select.h>
# endif
# ifdef HAVE_POLL_SYSCALL
# include <poll.h>
# endif
#endif
#ifdef IO_INCLUDE
# include <io.h>
#endif
#ifdef INCLUDE_OSKIT_SOCKET
# include <oskit/net/socket.h>
#endif
#ifdef NO_ERRNO_GLOBAL
static int mzerrno = 0;
# define errno mzerrno
#else
# include <errno.h>
#endif
#ifdef USE_UNIX_SOCKETS_TCP
# include <netinet/in.h>
# include <netdb.h>
# include <sys/socket.h>
# include <fcntl.h>
# define TCP_SOCKSENDBUF_SIZE 32768
# define NOT_WINSOCK(x) x
# define SOCK_ERRNO() errno
# define WAS_EAGAIN(e) ((e == EWOULDBLOCK) || (e == EAGAIN) || (e == EINPROGRESS) || (e == EALREADY))
# define WAS_WSAEMSGSIZE(e) 0
# define mz_AFNOSUPPORT EAFNOSUPPORT
#endif
#ifdef USE_WINSOCK_TCP
# include <process.h>
# include <winsock2.h>
# include <ws2tcpip.h>
# ifndef __MINGW32__
# include <wspiapi.h>
# else
typedef int (WINAPI*gai_t)(const char*, const char*, const struct mz_addrinfo *, struct mz_addrinfo **);
typedef void (WINAPI*fai_t)(struct mz_addrinfo *ai);
# endif
struct SOCKADDR_IN {
short sin_family;
unsigned short sin_port;
struct in_addr sin_addr;
char sin_zero[8];
};
# define NOT_WINSOCK(x) 0
# define SOCK_ERRNO() WSAGetLastError()
# define WAS_EAGAIN(e) ((e == WSAEWOULDBLOCK) || (e == WSAEINPROGRESS))
# define WAS_WSAEMSGSIZE(e) (e == WSAEMSGSIZE)
# define mz_AFNOSUPPORT WSAEAFNOSUPPORT
extern int scheme_stupid_windows_machine;
# ifdef MZ_USE_PLACES
static HANDLE winsock_sema;
# endif
#endif
intptr_t scheme_socket_errno() {
return SOCK_ERRNO();
}
#include "schfd.h"
#define TCP_BUFFER_SIZE 4096
#ifdef USE_UNIX_SOCKETS_TCP
typedef intptr_t tcp_t;
# define INVALID_SOCKET (-1)
static void closesocket(intptr_t s) {
int cr;
do {
cr = close(s);
} while ((cr == -1) && (errno == EINTR));
}
#endif
#ifdef USE_WINSOCK_TCP
typedef SOCKET tcp_t;
#endif
#ifdef USE_SOCKETS_TCP
typedef struct {
Scheme_Object so;
Scheme_Custodian_Reference *mref;
int count;
# ifdef HAVE_POLL_SYSCALL
struct pollfd *pfd;
# endif
tcp_t s[mzFLEX_ARRAY_DECL];
} listener_t;
#endif
typedef struct Scheme_Tcp_Buf {
MZTAG_IF_REQUIRED
short refcount;
char *buffer, *out_buffer;
short bufpos, bufmax;
short hiteof, bufmode;
short out_bufpos, out_bufmax;
short out_bufmode;
} Scheme_Tcp_Buf;
typedef struct Scheme_Tcp {
Scheme_Tcp_Buf b;
tcp_t tcp;
int flags;
} Scheme_Tcp;
# define MZ_TCP_ABANDON_OUTPUT 0x1
# define MZ_TCP_ABANDON_INPUT 0x2
#define UDP_IS_SUPPORTED
#ifdef UDP_IS_SUPPORTED
typedef struct Scheme_UDP {
Scheme_Object so; /* scheme_udp_type */
MZ_HASH_KEY_EX
tcp_t s; /* ok, tcp_t was a bad name */
char bound, connected;
Scheme_Object *previous_from_addr;
Scheme_Custodian_Reference *mref;
} Scheme_UDP;
#endif /* UDP_IS_SUPPORTED */
#endif /* USE_TCP */
#if defined(WINDOWS_PROCESSES) || defined(WINDOWS_FILE_HANDLES)
# define DECL_OS_FDSET(n) fd_set n[1]
# define INIT_DECL_OS_FDSET(r, w, e) /* empty */
# define INIT_DECL_OS_RD_FDSET(r) /* empty */
# define INIT_DECL_OS_WR_FDSET(r) /* empty */
# define INIT_DECL_OS_ER_FDSET(r) /* empty */
# define MZ_OS_FD_ZERO(p) FD_ZERO(p)
# define MZ_OS_FD_SET(n, p) FD_SET(n, p)
# define MZ_OS_FD_CLR(n, p) FD_CLR(n, p)
#else
# define DECL_OS_FDSET(n) DECL_FDSET(n, 1)
# define INIT_DECL_OS_FDSET(r, w, e) INIT_DECL_FDSET(r, w, e)
# define INIT_DECL_OS_RD_FDSET(r) INIT_DECL_RD_FDSET(r)
# define INIT_DECL_OS_WR_FDSET(r) INIT_DECL_WR_FDSET(r)
# define INIT_DECL_OS_ER_FDSET(r) INIT_DECL_ER_FDSET(r)
# define MZ_OS_FD_ZERO(p) MZ_FD_ZERO(p)
# define MZ_OS_FD_SET(n, p) MZ_FD_SET(n, p)
# define MZ_OS_FD_CLR(n, p) MZ_FD_CLR(n, p)
#endif
#define MZ_OS_FD_ISSET(n, p) FD_ISSET(n, p)
static Scheme_Object *tcp_connect(int argc, Scheme_Object *argv[]);
static Scheme_Object *tcp_connect_break(int argc, Scheme_Object *argv[]);
static Scheme_Object *tcp_listen(int argc, Scheme_Object *argv[]);
static Scheme_Object *tcp_stop(int argc, Scheme_Object *argv[]);
static Scheme_Object *tcp_accept_ready(int argc, Scheme_Object *argv[]);
static Scheme_Object *tcp_accept(int argc, Scheme_Object *argv[]);
static Scheme_Object *tcp_accept_evt(int argc, Scheme_Object *argv[]);
static Scheme_Object *tcp_accept_break(int argc, Scheme_Object *argv[]);
static Scheme_Object *tcp_listener_p(int argc, Scheme_Object *argv[]);
static Scheme_Object *tcp_addresses(int argc, Scheme_Object *argv[]);
static Scheme_Object *tcp_abandon_port(int argc, Scheme_Object *argv[]);
static Scheme_Object *tcp_port_p(int argc, Scheme_Object *argv[]);
static Scheme_Object *make_udp(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_close(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_p(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_bound_p(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_connected_p(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_bind(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_connect(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_send_to(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_send(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_send_to_star(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_send_star(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_send_to_enable_break(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_send_enable_break(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_receive(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_receive_star(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_receive_enable_break(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_read_ready_evt(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_write_ready_evt(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_read_evt(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_write_evt(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_write_to_evt(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_multicast_loopback_p(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_multicast_set_loopback(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_multicast_ttl(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_multicast_set_ttl(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_multicast_interface(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_multicast_set_interface(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_multicast_join_group(int argc, Scheme_Object *argv[]);
static Scheme_Object *udp_multicast_leave_group(int argc, Scheme_Object *argv[]);
static int tcp_check_accept_evt(Scheme_Object *ae, Scheme_Schedule_Info *sinfo);
static void tcp_accept_evt_needs_wakeup(Scheme_Object *_ae, void *fds);
#ifdef UDP_IS_SUPPORTED
static int udp_evt_check_ready(Scheme_Object *uw, Scheme_Schedule_Info *sinfo);
static void udp_evt_needs_wakeup(Scheme_Object *_uw, void *fds);
#endif
#ifdef MZ_PRECISE_GC
static void register_traversers(void);
#endif
void scheme_init_network(Scheme_Env *env)
{
Scheme_Env *netenv;
#ifdef MZ_PRECISE_GC
register_traversers();
#endif
netenv = scheme_primitive_module(scheme_intern_symbol("#%network"), env);
GLOBAL_PRIM_W_ARITY2 ( "tcp-connect" , tcp_connect , 2 , 4 , 2 , 2 , netenv ) ;
GLOBAL_PRIM_W_ARITY2 ( "tcp-connect/enable-break" , tcp_connect_break , 2 , 4 , 2 , 2 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "tcp-listen" , tcp_listen , 1 , 4 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "tcp-close" , tcp_stop , 1 , 1 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "tcp-accept-ready?" , tcp_accept_ready , 1 , 1 , netenv ) ;
GLOBAL_PRIM_W_ARITY2 ( "tcp-accept" , tcp_accept , 1 , 1 , 2 , 2 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "tcp-accept-evt" , tcp_accept_evt , 1 , 1 , netenv ) ;
GLOBAL_PRIM_W_ARITY2 ( "tcp-accept/enable-break" , tcp_accept_break , 1 , 1 , 2 , 2 , netenv ) ;
GLOBAL_FOLDING_PRIM ( "tcp-listener?" , tcp_listener_p , 1 , 1 , 1 , netenv ) ;
GLOBAL_PRIM_W_ARITY2 ( "tcp-addresses" , tcp_addresses , 1 , 2 , 2 , 4 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "tcp-abandon-port" , tcp_abandon_port , 1 , 1 , netenv ) ;
GLOBAL_FOLDING_PRIM ( "tcp-port?" , tcp_port_p , 1 , 1 , 1 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-open-socket" , make_udp , 0 , 2 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-close" , udp_close , 1 , 1 , netenv ) ;
GLOBAL_FOLDING_PRIM ( "udp?" , udp_p , 1 , 1 , 1 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-bound?" , udp_bound_p , 1 , 1 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-connected?" , udp_connected_p , 1 , 1 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-bind!" , udp_bind , 3 , 4 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-connect!" , udp_connect , 3 , 3 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-send-to" , udp_send_to , 4 , 6 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-send" , udp_send , 2 , 4 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-send-to*" , udp_send_to_star , 4 , 6 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-send*" , udp_send_star , 2 , 4 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-send-to/enable-break" , udp_send_to_enable_break , 4 , 6 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-send/enable-break" , udp_send_enable_break , 2 , 4 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-receive!" , udp_receive , 2 , 4 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-receive!*" , udp_receive_star , 2 , 4 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-receive!/enable-break" , udp_receive_enable_break , 2 , 4 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-receive-ready-evt" , udp_read_ready_evt , 1 , 1 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-send-ready-evt" , udp_write_ready_evt , 1 , 1 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-receive!-evt" , udp_read_evt , 2 , 4 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-send-evt" , udp_write_evt , 2 , 4 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-send-to-evt" , udp_write_to_evt , 4 , 6 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-multicast-loopback?" , udp_multicast_loopback_p , 1 , 1 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-multicast-set-loopback!", udp_multicast_set_loopback,2, 2 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-multicast-ttl" , udp_multicast_ttl , 1 , 1 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-multicast-set-ttl!" , udp_multicast_set_ttl , 2 , 2 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-multicast-interface" , udp_multicast_interface , 1 , 1 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-multicast-set-interface!", udp_multicast_set_interface,2,2, netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-multicast-join-group!" , udp_multicast_join_group , 3 , 3 , netenv ) ;
GLOBAL_PRIM_W_ARITY ( "udp-multicast-leave-group!", udp_multicast_leave_group, 3 , 3 , netenv ) ;
scheme_finish_primitive_module(netenv);
#ifdef USE_WINSOCK_TCP
# ifdef MZ_USE_PLACES
if (!winsock_sema) {
winsock_sema = CreateSemaphore(NULL, 1, 1, NULL);
}
# endif
#endif
}
static int check_fd_sema(tcp_t s, int mode, Scheme_Schedule_Info *sinfo, Scheme_Object *orig)
{
Scheme_Object *sema;
sema = scheme_fd_to_semaphore(s, mode, 1);
if (sema) {
if (!scheme_wait_sema(sema, 1)) {
if (sinfo && !sinfo->no_redirect)
scheme_set_sync_target(sinfo, sema, orig, NULL, 0, 0, NULL);
return 0;
}
}
return 1;
}
/*========================================================================*/
/* TCP glue */
/*========================================================================*/
/* These two need o be outside of USE_TCP */
#define PORT_ID_TYPE "(integer-in 1 65535)"
#define CHECK_PORT_ID(obj) (SCHEME_INTP(obj) && (SCHEME_INT_VAL(obj) >= 1) && (SCHEME_INT_VAL(obj) <= 65535))
#define LISTEN_PORT_ID_TYPE "(integer-in 0 65535)"
#define CHECK_LISTEN_PORT_ID(obj) (SCHEME_INTP(obj) && (SCHEME_INT_VAL(obj) >= 0) && (SCHEME_INT_VAL(obj) <= 65535))
#ifdef USE_TCP
#ifdef USE_SOCKETS_TCP
#define MAKE_TCP_ARG tcp_t tcp,
#else
#define MAKE_TCP_ARG
#endif
#define REGISTER_SOCKET(s) /**/
#define UNREGISTER_SOCKET(s) /**/
#ifdef USE_UNIX_SOCKETS_TCP
typedef struct sockaddr_in mz_unspec_address;
#endif
#ifdef USE_WINSOCK_TCP
typedef struct SOCKADDR_IN mz_unspec_address;
# undef REGISTER_SOCKET
# undef UNREGISTER_SOCKET
# define REGISTER_SOCKET(s) winsock_remember(s)
# define UNREGISTER_SOCKET(s) winsock_forget(s)
#endif
/******************************* hostnames ************************************/
#if defined(OS_X) || defined(USE_PTHREAD_THREAD_TIMER)
# define PTHREADS_OK_FOR_GHBN
#endif
# ifdef PROTOENT_IS_INT
# define PROTO_P_PROTO PROTOENT_IS_INT
# else
SHARED_OK static struct protoent *proto;
# define PROTO_P_PROTO (proto ? proto->p_proto : 0)
# endif
# ifndef MZ_PF_INET
# define MZ_PF_INET PF_INET
# endif
/* For getting connection names: */
#define MZ_SOCK_NAME_MAX_LEN 256
#define MZ_SOCK_HOST_NAME_MAX_LEN 64
#define MZ_SOCK_SVC_NAME_MAX_LEN 32
/* mz_addrinfo is defined in scheme.h */
#ifdef HAVE_GETADDRINFO
# define mzAI_PASSIVE AI_PASSIVE
# define mz_getaddrinfo getaddrinfo
# define mz_freeaddrinfo freeaddrinfo
# define mz_gai_strerror gai_strerror
#else
# define mzAI_PASSIVE 0
static int mz_getaddrinfo(const char *nodename, const char *servname,
const struct mz_addrinfo *hints, struct mz_addrinfo **res)
XFORM_SKIP_PROC
{
struct hostent *h;
#ifdef __MINGW32__
{
HMODULE hm;
hm = LoadLibrary("ws2_32.dll");
if (hm) {
gai_t gai;
gai = (gai_t)GetProcAddress(hm, "getaddrinfo");
if (gai) {
int v;
v = gai(nodename, servname, hints, res);
if (!v && !(*res)->ai_addr)
(*res)->ai_addrlen = 0;
return v;
}
}
}
#endif
if (nodename)
h = gethostbyname(nodename);
else
h = NULL;
if (h || !nodename) {
GC_CAN_IGNORE struct mz_addrinfo *ai;
GC_CAN_IGNORE struct sockaddr_in *sa;
int j, id = 0;
ai = (struct mz_addrinfo *)malloc(sizeof(struct mz_addrinfo));
sa = (struct sockaddr_in *)malloc(sizeof(struct sockaddr_in));
ai->ai_addr = (struct sockaddr *)sa;
ai->ai_addrlen = sizeof(struct sockaddr_in);
if (servname) {
for (j = 0; servname[j]; j++) {
id = (id * 10) + (servname[j] - '0');
}
}
ai->ai_family = MZ_PF_INET;
ai->ai_socktype = hints->ai_socktype;
ai->ai_protocol = hints->ai_protocol;
ai->ai_next = NULL;
sa->sin_family = (id ? AF_INET : AF_UNSPEC);
j = htons(id);
sa->sin_port = j;
memset(&(sa->sin_addr), 0, sizeof(sa->sin_addr));
memset(&(sa->sin_zero), 0, sizeof(sa->sin_zero));
if (h)
memcpy(&sa->sin_addr, h->h_addr_list[0], h->h_length);
*res = ai;
return 0;
}
return h_errno;
}
void mz_freeaddrinfo(struct mz_addrinfo *ai)
XFORM_SKIP_PROC
{
#ifdef __MINGW32__
{
HMODULE hm;
hm = LoadLibrary("ws2_32.dll");
if (hm) {
fai_t fai;
fai = (fai_t)GetProcAddress(hm, "freeaddrinfo");
if (fai) {
fai(ai);
return;
}
}
}
#endif
free(ai->ai_addr);
free(ai);
}
const char *mz_gai_strerror(int ecode)
XFORM_SKIP_PROC
{
#ifdef __MINGW32__
return NULL; /* => use FormatMessageW(), instead */
#else
return hstrerror(ecode);
#endif
}
#endif
#if defined(USE_WINSOCK_TCP) || defined(PTHREADS_OK_FOR_GHBN)
# ifdef USE_WINSOCK_TCP
# ifdef __BORLANDC__
# define MZ_LPTHREAD_START_ROUTINE unsigned int (__stdcall*)(void*)
# else
# define MZ_LPTHREAD_START_ROUTINE LPTHREAD_START_ROUTINE
# endif
# else
# include <pthread.h>
# define MZ_LPTHREAD_START_ROUTINE void *(*)(void *)
# endif
typedef struct {
# ifdef USE_WINSOCK_TCP
HANDLE th;
# else
int pin;
# endif
struct mz_addrinfo *result;
int err;
int done;
} GHBN_Rec;
/* For in-thread DNS: */
#define MZ_MAX_HOSTNAME_LEN 128
#define MZ_MAX_SERVNAME_LEN 32
typedef struct GHBN_Thread_Data {
int ghbn_lock;
char ghbn_hostname[MZ_MAX_HOSTNAME_LEN];
char ghbn_servname[MZ_MAX_SERVNAME_LEN];
struct mz_addrinfo ghbn_hints;
# ifdef USE_WINSOCK_TCP
HANDLE ready_sema;
# else
int ready_fd;
# endif
struct mz_addrinfo *ghbn_result;
int ghbn_err;
} GHBN_Thread_Data;
THREAD_LOCAL_DECL(GHBN_Thread_Data *ghbn_thread_data);
static intptr_t getaddrinfo_in_thread(void *_data)
XFORM_SKIP_PROC
{
GHBN_Thread_Data *data = (GHBN_Thread_Data *)_data;
int ok;
struct mz_addrinfo *res, hints;
char hn_copy[MZ_MAX_HOSTNAME_LEN], sn_copy[MZ_MAX_SERVNAME_LEN];
# ifndef USE_WINSOCK_TCP
int fd = data->ready_fd;
int cr;
# endif
if (data->ghbn_result) {
mz_freeaddrinfo(data->ghbn_result);
data->ghbn_result = NULL;
}
strcpy(hn_copy, data->ghbn_hostname);
strcpy(sn_copy, data->ghbn_servname);
memcpy(&hints, &data->ghbn_hints, sizeof(hints));
# ifdef USE_WINSOCK_TCP
ReleaseSemaphore(data->ready_sema, 1, NULL);
# else
do {
cr = write(fd, "?", 1);
} while ((cr == -1) && (errno == EINTR));
# endif
res = NULL;
ok = mz_getaddrinfo(hn_copy[0] ? hn_copy : NULL,
sn_copy[0] ? sn_copy : NULL,
&hints, &res);
data->ghbn_result = res;
data->ghbn_err = ok;
# ifndef USE_WINSOCK_TCP
{
long v = 1;
do {
cr = write(fd, &v, sizeof(v));
} while ((cr == -1) && (errno == EINTR));
do {
cr = close(fd);
} while ((cr == -1) && (errno == EINTR));
}
# endif
return 1;
}
static void release_ghbn_lock(GHBN_Rec *rec)
{
ghbn_thread_data->ghbn_lock = 0;
# ifdef USE_WINSOCK_TCP
CloseHandle(rec->th);
# else
close(rec->pin);
# endif
}
static int ghbn_lock_avail(Scheme_Object *_ignored)
{
return !ghbn_thread_data->ghbn_lock;
}
static int ghbn_thread_done(Scheme_Object *_rec)
{
GHBN_Rec *rec = (GHBN_Rec *)_rec;
if (rec->done)
return 1;
# ifdef USE_WINSOCK_TCP
if (WaitForSingleObject(rec->th, 0) == WAIT_OBJECT_0) {
rec->result = ghbn_thread_data->ghbn_result;
ghbn_thread_data->ghbn_result = NULL;
rec->err = ghbn_thread_data->ghbn_err;
rec->done = 1;
return 1;
}
# else
{
long v;
int cr;
do {
cr = read(rec->pin, &v, sizeof(long));
} while ((cr == -1) && (errno == EINTR));
if (cr > 0) {
rec->result = ghbn_thread_data->ghbn_result;
ghbn_thread_data->ghbn_result = NULL;
rec->err = ghbn_thread_data->ghbn_err;
rec->done = 1;
return 1;
}
}
# endif
return 0;
}
static void ghbn_thread_need_wakeup(Scheme_Object *_rec, void *fds)
{
GHBN_Rec *rec = (GHBN_Rec *)_rec;
# ifdef USE_WINSOCK_TCP
scheme_add_fd_handle((void *)rec->th, fds, 0);
# else
{
void *fds2;
fds2 = MZ_GET_FDSET(fds, 2);
MZ_FD_SET(rec->pin, (fd_set *)fds);
MZ_FD_SET(rec->pin, (fd_set *)fds2);
}
# endif
}
static int MZ_GETADDRINFO(const char *name, const char *svc, struct mz_addrinfo *hints, struct mz_addrinfo **res)
{
GHBN_Rec *rec;
int ok;
if ((name && ((strlen(name) >= MZ_MAX_HOSTNAME_LEN) || !name[0]))
|| (svc && ((strlen(svc) >= MZ_MAX_SERVNAME_LEN) || !svc[0]))) {
/* Give up on a separate thread. */
return mz_getaddrinfo(name, svc, hints, res);
}
if (!ghbn_thread_data) {
ghbn_thread_data = (GHBN_Thread_Data *)malloc(sizeof(GHBN_Thread_Data));
memset(ghbn_thread_data, 0, sizeof(GHBN_Thread_Data));
}
rec = MALLOC_ONE_ATOMIC(GHBN_Rec);
rec->done = 0;
scheme_block_until(ghbn_lock_avail, NULL, NULL, 0);
ghbn_thread_data->ghbn_lock = 1;
if (name)
strcpy(ghbn_thread_data->ghbn_hostname, name);
else
ghbn_thread_data->ghbn_hostname[0] = 0;
if (svc)
strcpy(ghbn_thread_data->ghbn_servname, svc);
else
ghbn_thread_data->ghbn_servname[0] = 0;
memcpy(&ghbn_thread_data->ghbn_hints, hints, sizeof(*hints));
# ifdef USE_WINSOCK_TCP
{
HANDLE ready_sema;
DWORD id;
intptr_t th;
ready_sema = CreateSemaphore(NULL, 0, 1, NULL);
ghbn_thread_data->ready_sema = ready_sema;
th = _beginthreadex(NULL, 5000,
(MZ_LPTHREAD_START_ROUTINE)getaddrinfo_in_thread,
ghbn_thread_data, 0, &id);
WaitForSingleObject(ghbn_thread_data->ready_sema, INFINITE);
CloseHandle(ghbn_thread_data->ready_sema);
rec->th = (HANDLE)th;
ok = 1;
}
# else
{
int p[2];
if (pipe(p)) {
ok = 0;
} else {
pthread_t t;
rec->pin = p[0];
ghbn_thread_data->ready_fd = p[1];
if (pthread_create(&t, NULL,
(MZ_LPTHREAD_START_ROUTINE)getaddrinfo_in_thread,
ghbn_thread_data)) {
close(p[0]);
close(p[1]);
ok = 0;
} else {
char buf[1];
int cr;
pthread_detach(t);
do {
cr = read(rec->pin, buf, 1);
} while ((cr == -1) && (errno == EINTR));
fcntl(rec->pin, F_SETFL, MZ_NONBLOCKING);
ok = 1;
}
}
if (!ok) {
getaddrinfo_in_thread(ghbn_thread_data);
rec->result = ghbn_thread_data->ghbn_result;
ghbn_thread_data->ghbn_result = NULL;
rec->err = ghbn_thread_data->ghbn_err;
}
}
# endif
if (ok) {
BEGIN_ESCAPEABLE(release_ghbn_lock, rec);
scheme_block_until(ghbn_thread_done, ghbn_thread_need_wakeup, (Scheme_Object *)rec, 0);
END_ESCAPEABLE();
# ifdef USE_WINSOCK_TCP
CloseHandle(rec->th);
# else
close(rec->pin);
# endif
}
ghbn_thread_data->ghbn_lock = 0;
*res = rec->result;
return rec->err;
}
void scheme_free_ghbn_data() {
if (ghbn_thread_data) {
free(ghbn_thread_data);
ghbn_thread_data = NULL;
}
}
#else
# define MZ_GETADDRINFO mz_getaddrinfo
void scheme_free_ghbn_data() { }
#endif
#ifdef USE_SOCKETS_TCP
struct mz_addrinfo *scheme_get_host_address(const char *address, int id, int *err,
int family, int passive, int tcp)
{
char buf[32], *service;
int ok;
GC_CAN_IGNORE struct mz_addrinfo *r, hints;
r = NULL;
if (id >= 0) {
service = buf;
sprintf(buf, "%d", id);
} else
service = NULL;
if (!address && !service) {
*err = -1;
return NULL;
}
memset(&hints, 0, sizeof(struct mz_addrinfo));
hints.ai_family = ((family < 0) ? PF_UNSPEC : family);
if (passive) {
hints.ai_flags |= mzAI_PASSIVE;
}
if (tcp) {
hints.ai_socktype = SOCK_STREAM;
# ifndef PROTOENT_IS_INT
if (!proto) {
proto = getprotobyname("tcp");
}
# endif
hints.ai_protocol= PROTO_P_PROTO;
} else {
hints.ai_socktype = SOCK_DGRAM;
}
ok = MZ_GETADDRINFO(address, service, &hints, &r);
*err = ok;
if (!ok)
return r;
else
return NULL;
}
void scheme_free_host_address(struct mz_addrinfo *a)
{
mz_freeaddrinfo(a);
}
const char *scheme_host_address_strerror(int errnum)
{
return mz_gai_strerror(errnum);
}
#endif
/******************************* WinSock ***********************************/
#ifdef USE_WINSOCK_TCP
static int wsr_size = 0;
static tcp_t *wsr_array;
static void winsock_remember(tcp_t s)
{
int i, new_size;
tcp_t *naya;
# ifdef MZ_USE_PLACES
WaitForSingleObject(winsock_sema, INFINITE);
# endif
for (i = 0; i < wsr_size; i++) {
if (!wsr_array[i]) {
wsr_array[i] = s;
break;
}
}
if (i >= wsr_size) {
if (!wsr_size) {
new_size = 32;
} else
new_size = 2 * wsr_size;
naya = malloc(sizeof(tcp_t) * new_size);
for (i = 0; i < wsr_size; i++) {
naya[i] = wsr_array[i];
}
naya[wsr_size] = s;
if (wsr_array) free(wsr_array);
wsr_array = naya;
wsr_size = new_size;
}
# ifdef MZ_USE_PLACES
ReleaseSemaphore(winsock_sema, 1, NULL);
# endif
}
static void winsock_forget(tcp_t s)
{
int i;
# ifdef MZ_USE_PLACES
WaitForSingleObject(winsock_sema, INFINITE);
# endif
for (i = 0; i < wsr_size; i++) {
if (wsr_array[i] == s) {
wsr_array[i] = (tcp_t)NULL;
break;
}
}
# ifdef MZ_USE_PLACES
ReleaseSemaphore(winsock_sema, 1, NULL);
# endif
}
static int winsock_done(void)
{
int i;
/* only called in the original place */
for (i = 0; i < wsr_size; i++) {
if (wsr_array[i]) {
closesocket(wsr_array[i]);
wsr_array[i] = (tcp_t)NULL;
}
}
return WSACleanup();
}
static void TCP_INIT(char *name)
{
static int started = 0;
# ifdef MZ_USE_PLACES
WaitForSingleObject(winsock_sema, INFINITE);
# endif
if (!started) {
WSADATA data;
if (!WSAStartup(MAKEWORD(1, 1), &data)) {
started = 1;
#ifdef __BORLANDC__
atexit((void(*)())winsock_done);
#else
_onexit(winsock_done);
#endif
}
}
if (!started)
scheme_raise_exn(MZEXN_FAIL_UNSUPPORTED,
"%s: no winsock driver",
name);
# ifdef MZ_USE_PLACES
ReleaseSemaphore(winsock_sema, 1, NULL);
# endif
}
#else
/* Not Winsock */
# define TCP_INIT(x) /* nothing */
#endif
/*========================================================================*/
/* TCP ports and listeners */
/*========================================================================*/
#ifdef USE_SOCKETS_TCP
#define LISTENER_WAS_CLOSED(x) (((listener_t *)(x))->s[0] == INVALID_SOCKET)
#endif
#ifndef LISTENER_WAS_CLOSED
#define LISTENER_WAS_CLOSED(x) 0
#endif
/* Forward declaration */
static int stop_listener(Scheme_Object *o);
static Scheme_Object *listener_to_evt(listener_t *listener)
{
Scheme_Object **a, *sema;
int i;
a = MALLOC_N(Scheme_Object*, listener->count);
for (i = listener->count; i--; ) {
sema = scheme_fd_to_semaphore(listener->s[i], MZFD_CREATE_READ, 1);
if (!sema)
return NULL;
a[i] = sema;
}
return scheme_make_evt_set(listener->count, a);
}
static int tcp_check_accept(Scheme_Object *_listener, Scheme_Schedule_Info *sinfo)
{
#ifdef USE_SOCKETS_TCP
listener_t *listener = (listener_t *)_listener;
int sr, i;
# ifndef HAVE_POLL_SYSCALL
tcp_t s, mx;
DECL_OS_FDSET(readfds);
DECL_OS_FDSET(exnfds);
struct timeval time = {0, 0};
# endif
if (!sinfo || !sinfo->is_poll) {
for (i = listener->count; i--; ) {
if (check_fd_sema(listener->s[i], MZFD_CHECK_READ, NULL, NULL))
break;
}
if (i < 0) return 0;
}