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yap-6.3/C/ypsocks.c
vsc d7f80ea1ad Stasinos noticed that _YAP_ breaks C standard: use Yap_ instead. 
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@691 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
2002-11-18 18:18:05 +00:00

1242 lines
30 KiB
C
Raw Blame History

/*************************************************************************
* *
* YAP Prolog %W% %G%
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: io.h *
* Last rev: 19/2/88 *
* mods: *
* comments: control YAP from sockets. *
* *
*************************************************************************/
#include "Yap.h"
#include "Yatom.h"
#include "Heap.h"
#include "yapio.h"
#if USE_SOCKET
#if HAVE_UNISTD_H && !defined(__MINGW32__) && !_MSC_VER
#include <unistd.h>
#endif
#if STDC_HEADERS
#include <stdlib.h>
#endif
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if HAVE_SYS_TIME_H && !defined(__MINGW32__) && !_MSC_VER
#include <sys/time.h>
#endif
#if HAVE_IO_H
#include <io.h>
#endif
#if _MSC_VER || defined(__MINGW32__)
#include <io.h>
#include <winsock2.h>
#else
#if HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#if HAVE_SYS_UN_H
#include <sys/un.h>
#endif
#if HAVE_NETDB_H
#include <netdb.h>
#endif
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#if HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
#if HAVE_STRING_H
#include <string.h>
#endif
#if HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#if HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#endif
/* make sure we can compile in any platform */
#ifndef AF_UNSPEC
#define AF_UNSPEC 0
#endif
#ifndef AF_LOCAL
#define AF_LOCAL AF_UNSPEC
#endif
#ifndef AF_AAL5
#define AF_AAL5 AF_UNSPEC
#endif
#ifndef AF_APPLETALK
#define AF_APPLETALK AF_UNSPEC
#endif
#ifndef AF_AX25
#define AF_AX25 AF_UNSPEC
#endif
#ifndef AF_BRIDGE
#define AF_BRIDGE AF_UNSPEC
#endif
#ifndef AF_DECnet
#define AF_DECnet AF_UNSPEC
#endif
#ifndef AF_FILE
#define AF_FILE AF_UNSPEC
#endif
#ifndef AF_INET
#define AF_INET AF_UNSPEC
#endif
#ifndef AF_INET6
#define AF_INET6 AF_UNSPEC
#endif
#ifndef AF_IPX
#define AF_IPX AF_UNSPEC
#endif
#ifndef AF_LOCAL
#define AF_LOCAL AF_UNSPEC
#endif
#ifndef AF_NETBEUI
#define AF_NETBEUI AF_UNSPEC
#endif
#ifndef AF_NETLINK
#define AF_NETLINK AF_UNSPEC
#endif
#ifndef AF_NETROM
#define AF_NETROM AF_UNSPEC
#endif
#ifndef AF_OSINET
#define AF_OSINET AF_UNSPEC
#endif
#ifndef AF_PACKET
#define AF_PACKET AF_UNSPEC
#endif
#ifndef AF_ROSE
#define AF_ROSE AF_UNSPEC
#endif
#ifndef AF_ROUTE
#define AF_ROUTE AF_UNSPEC
#endif
#ifndef AF_SECURITY
#define AF_SECURITY AF_UNSPEC
#endif
#ifndef AF_SNA
#define AF_SNA AF_UNSPEC
#endif
#ifndef AF_UNIX
#define AF_UNIX AF_UNSPEC
#endif
#ifndef AF_X25
#define AF_X25 AF_UNSPEC
#endif
#ifndef SOCK_STREAM
#define SOCK_STREAM -1
#endif
#ifndef SOCK_DGRAM
#define SOCK_DGRAM -1
#endif
#ifndef SOCK_RAW
#define SOCK_RAW -1
#endif
#ifndef SOCK_RDM
#define SOCK_RDM -1
#endif
#ifndef SOCK_SEQPACKET
#define SOCK_SEQPACKET -1
#endif
#ifndef SOCK_PACKET
#define SOCK_PACKET -1
#endif
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 256
#endif
#ifndef BUFSIZ
#define BUFSIZ 256
#endif
#if _MSC_VER || defined(__MINGW32__)
#define socket_errno WSAGetLastError()
#define invalid_socket_fd(fd) (fd) == INVALID_SOCKET
#else
#define socket_errno errno
#define invalid_socket_fd(fd) (fd) < 0
#endif
#define INTERFACE_PORT 8081
#define HOST "khome.ncc.up.pt"
STD_PROTO(static void crash, (char *));
static void
crash(char *msg)
{
fprintf(stderr, msg);
exit(1);
}
void
Yap_init_socks(char *host, long interface_port)
{
int s;
int r;
struct sockaddr_in soadr;
struct in_addr adr;
struct hostent *he;
struct linger ling; /* For making sockets linger. */
he = gethostbyname(host);
if (!he) {
crash("[can not get address for host]");
}
(void) memset((char *) &adr, '\0', sizeof(struct sockaddr_in));
soadr.sin_family = AF_INET;
soadr.sin_port = htons((short) interface_port);
if (he != NULL) {
memcpy((char *) &adr,
(char *) he->h_addr_list[0], (size_t) he->h_length);
} else {
adr.s_addr = inet_addr(host);
}
soadr.sin_addr.s_addr = adr.s_addr;
s = socket ( AF_INET, SOCK_STREAM, 0);
if (s<0) {
crash("[ could not create socket ]");
}
ling.l_onoff = 1;
ling.l_linger = 0;
setsockopt(s, SOL_SOCKET, SO_LINGER, (char *) &ling,
sizeof(ling));
r = connect ( s, (struct sockaddr *) &soadr, sizeof(soadr));
if (r<0) {
fprintf(Yap_stderr,"connect failed with %d\n",r);
crash("[ could not connect to interface]");
}
/* now reopen stdin stdout and stderr */
#if HAVE_DUP2 && !defined(__MINGW32__)
if(dup2(s,0)<0) {
fprintf(Yap_stderr,"could not dup2 stdin\n");
return;
}
if(dup2(s,1)<0) {
fprintf(Yap_stderr,"could not dup2 stdout\n");
return;
}
if(dup2(s,2)<0) {
fprintf(Yap_stderr,"could not dup2 stderr\n");
return;
}
#elif _MSC_VER || defined(__MINGW32__)
if(_dup2(s,0)<0) {
fprintf(Yap_stderr,"could not dup2 stdin\n");
return;
}
if(_dup2(s,1)<0) {
fprintf(Yap_stderr,"could not dup2 stdout\n");
return;
}
if(_dup2(s,2)<0) {
fprintf(Yap_stderr,"could not dup2 stderr\n");
return;
}
#else
if(dup2(s,0)<0) {
fprintf(Yap_stderr,"could not dup2 stdin\n");
return;
}
yp_iob[0].cnt = 0;
yp_iob[0].flags = _YP_IO_SOCK | _YP_IO_READ;
if(dup2(s,1)<0) {
fprintf(Yap_stderr,"could not dup2 stdout\n");
return;
}
yp_iob[1].cnt = 0;
yp_iob[1].flags = _YP_IO_SOCK | _YP_IO_WRITE;
if(dup2(s,2)<0) {
fprintf(Yap_stderr,"could not dup2 stderr\n");
return;
}
yp_iob[2].cnt = 0;
yp_iob[2].flags = _YP_IO_SOCK | _YP_IO_WRITE;
#endif
Yap_sockets_io = 1;
#if _MSC_VER || defined(__MINGW32__)
_close(s);
#else
close(s);
#endif
}
static Int
p_socket(void)
{
Term t1 = Deref(ARG1);
Term t2 = Deref(ARG2);
Term t3 = Deref(ARG3);
char *sdomain, *stype;
Int domain = AF_UNSPEC, type, protocol;
int fd;
Term out;
if (IsVarTerm(t1)) {
Yap_Error(INSTANTIATION_ERROR,t1,"socket/4");
return(FALSE);
}
if (!IsAtomTerm(t1)) {
Yap_Error(TYPE_ERROR_ATOM,t1,"socket/4");
return(FALSE);
}
if (IsVarTerm(t2)) {
Yap_Error(INSTANTIATION_ERROR,t2,"socket/4");
return(FALSE);
}
if (!IsAtomTerm(t2)) {
Yap_Error(TYPE_ERROR_ATOM,t2,"socket/4");
return(FALSE);
}
if (IsVarTerm(t3)) {
Yap_Error(INSTANTIATION_ERROR,t3,"socket/4");
return(FALSE);
}
if (!IsIntTerm(t3)) {
Yap_Error(TYPE_ERROR_ATOM,t3,"socket/4");
return(FALSE);
}
sdomain = RepAtom(AtomOfTerm(t1))->StrOfAE;
if (sdomain[0] != 'A' || sdomain[1] != 'F' || sdomain[2] != '_')
return(FALSE); /* Error */
sdomain += 3;
switch (sdomain[0]) {
case 'A':
if (strcmp(sdomain, "AAL5") == 0)
domain = AF_AAL5;
else if (strcmp(sdomain, "APPLETALK") == 0)
domain = AF_APPLETALK;
else if (strcmp(sdomain, "AX25") == 0)
domain = AF_AX25;
break;
case 'B':
if (strcmp(sdomain, "BRIDGE") == 0)
domain = AF_APPLETALK;
break;
case 'D':
if (strcmp(sdomain, "DECnet") == 0)
domain = AF_DECnet;
break;
case 'F':
if (strcmp(sdomain, "FILE") == 0)
domain = AF_FILE;
break;
case 'I':
if (strcmp(sdomain, "INET") == 0)
domain = AF_INET;
else if (strcmp(sdomain, "INET6") == 0)
domain = AF_INET6;
else if (strcmp(sdomain, "IPX") == 0)
domain = AF_IPX;
break;
case 'L':
if (strcmp(sdomain, "LOCAL") == 0)
domain = AF_LOCAL;
break;
case 'N':
if (strcmp(sdomain, "NETBEUI") == 0)
domain = AF_NETBEUI;
else if (strcmp(sdomain, "NETLINK") == 0)
domain = AF_NETLINK;
else if (strcmp(sdomain, "NETROM") == 0)
domain = AF_NETROM;
break;
case 'O':
if (strcmp(sdomain, "OSINET") == 0)
domain = AF_OSINET;
break;
case 'P':
if (strcmp(sdomain, "PACKET") == 0)
domain = AF_PACKET;
break;
case 'R':
if (strcmp(sdomain, "ROSE") == 0)
domain = AF_ROSE;
else if (strcmp(sdomain, "ROUTE") == 0)
domain = AF_ROUTE;
break;
case 'S':
if (strcmp(sdomain, "SECURITY") == 0)
domain = AF_SECURITY;
else if (strcmp(sdomain, "SNA") == 0)
domain = AF_SNA;
break;
case 'U':
if (strcmp(sdomain, "UNIX") == 0)
domain = AF_UNIX;
break;
case 'X':
if (strcmp(sdomain, "X25") == 0)
domain = AF_X25;
break;
}
stype = RepAtom(AtomOfTerm(t2))->StrOfAE;
if (stype[0] != 'S' || stype[1] != 'O' || stype[2] != 'C' || stype[3] != 'K' || stype[4] != '_')
return(FALSE); /* Error */
stype += 5;
if (strcmp(stype,"STREAM") == 0)
type = SOCK_STREAM;
else if (strcmp(stype,"DGRAM") == 0)
type = SOCK_DGRAM;
else if (strcmp(stype,"RAW") == 0)
type = SOCK_RAW;
else if (strcmp(stype,"RDM") == 0)
type = SOCK_RDM;
else if (strcmp(stype,"SEQPACKET") == 0)
type = SOCK_SEQPACKET;
else if (strcmp(stype,"PACKET") == 0)
type = SOCK_PACKET;
else
return(FALSE);
protocol = IntOfTerm(t3);
if (protocol < 0)
return(FALSE);
fd = socket(domain, type, protocol);
if (invalid_socket_fd(fd)) {
#if HAVE_STRERROR
Yap_Error(SYSTEM_ERROR, TermNil,
"socket/4 (socket: %s)", strerror(socket_errno));
#else
Yap_Error(SYSTEM_ERROR, TermNil,
"socket/4 (socket)");
#endif
return(FALSE);
}
if (domain == AF_UNIX || domain == AF_LOCAL )
out = Yap_InitSocketStream(fd, new_socket, af_unix);
else if (domain == AF_INET )
out = Yap_InitSocketStream(fd, new_socket, af_inet);
else {
/* ok, we currently don't support these sockets */
#if _MSC_VER || defined(__MINGW32__)
_close(fd);
#else
close(fd);
#endif
return(FALSE);
}
if (out == TermNil) return(FALSE);
return(Yap_unify(out,ARG4));
}
Int
Yap_CloseSocket(int fd, socket_info status, socket_domain domain)
{
#if _MSC_VER || defined(__MINGW32__)
/* prevent further writing
to the socket */
if (status == server_session_socket ||
status == client_socket) {
char bfr;
if (shutdown(fd, 1) != 0) {
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_close/1 (close)");
return(FALSE);
}
/* read all pending characters
from the socket */
while( recv( fd, &bfr, 1, 0 ) > 0 );
/* prevent further reading
from the socket */
if (shutdown(fd, 0) < 0) {
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_close/1 (close)");
return(FALSE);
}
/* close the socket */
if (closesocket(fd) != 0) {
#if HAVE_STRERROR
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_close/1 (close: %s)", strerror(socket_errno));
#else
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_close/1 (close)");
#endif
}
#else
if (status == server_session_socket ||
status == client_socket) {
if (shutdown(fd,2) < 0) {
#if HAVE_STRERROR
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_close/1 (shutdown: %s)", strerror(socket_errno));
#else
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_close/1 (shutdown)");
#endif
return(FALSE);
}
}
if (close(fd) != 0) {
#if HAVE_STRERROR
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_close/1 (close: %s)", strerror(socket_errno));
#else
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_close/1 (close)");
#endif
#endif
return(FALSE);
}
return(TRUE);
}
static Int
p_socket_close(void)
{
Term t1 = Deref(ARG1);
int sno;
if ((sno = Yap_CheckSocketStream(t1, "socket_close/1")) < 0) {
return (FALSE);
}
Yap_CloseStream(sno);
return(TRUE);
}
static Int
p_socket_bind(void)
{
Term t1 = Deref(ARG1);
Term t2 = Deref(ARG2);
int sno;
Functor fun;
socket_info status;
int fd;
if ((sno = Yap_CheckSocketStream(t1, "socket_bind/2")) < 0) {
return (FALSE);
}
status = Yap_GetSocketStatus(sno);
fd = Yap_GetStreamFd(sno);
if (status != new_socket) {
/* ok, this should be an error, as you are trying to bind */
return(FALSE);
}
if (IsVarTerm(t2)) {
Yap_Error(INSTANTIATION_ERROR,t2,"socket_bind/2");
return(FALSE);
}
if (!IsApplTerm(t2)) {
Yap_Error(DOMAIN_ERROR_STREAM,t2,"socket_bind/2");
return(FALSE);
}
fun = FunctorOfTerm(t2);
#if HAVE_SYS_UN_H
if (fun == FunctorAfUnix || fun == FunctorAfLocal) {
struct sockaddr_un sock;
Term taddr = ArgOfTerm(1, t2);
char *s;
int len;
if (IsVarTerm(taddr)) {
Yap_Error(INSTANTIATION_ERROR,t2,"socket_bind/2");
return(FALSE);
}
if (!IsAtomTerm(taddr)) {
Yap_Error(TYPE_ERROR_ATOM,taddr,"socket_bind/2");
return(FALSE);
}
s = RepAtom(AtomOfTerm(taddr))->StrOfAE;
sock.sun_family = AF_UNIX;
if ((len = strlen(s)) > 107) /* hit me with a broomstick */ {
Yap_Error(DOMAIN_ERROR_STREAM,taddr,"socket_bind/2");
return(FALSE);
}
sock.sun_family=AF_UNIX;
strcpy(sock.sun_path,s);
if (bind(fd,
(struct sockaddr *)(&sock),
((size_t) (((struct sockaddr_un *) 0)->sun_path) + len))
< 0) {
#if HAVE_STRERROR
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_bind/2 (bind: %s)", strerror(socket_errno));
#else
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_bind/2 (bind)");
#endif
return(FALSE);
}
Yap_UpdateSocketStream(sno, server_socket, af_unix);
return(TRUE);
} else
#endif
if (fun == FunctorAfInet) {
Term thost = ArgOfTerm(1, t2);
Term tport = ArgOfTerm(2, t2);
char *shost;
struct hostent *he;
struct sockaddr_in saddr;
Int port;
memset((void *)&saddr,(int) 0, sizeof(saddr));
if (IsVarTerm(thost)) {
saddr.sin_addr.s_addr = INADDR_ANY;
} else if (!IsAtomTerm(thost)) {
Yap_Error(TYPE_ERROR_ATOM,thost,"socket_bind/2");
return(FALSE);
} else {
shost = RepAtom(AtomOfTerm(thost))->StrOfAE;
if((he=gethostbyname(shost))==NULL) {
#if HAVE_STRERROR
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_bind/2 (gethostbyname: %s)", strerror(socket_errno));
#else
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_bind/2 (gethostbyname)");
#endif
return(FALSE);
}
memcpy((void *)&saddr.sin_addr, (void *)he->h_addr_list[0], he->h_length);
}
if (IsVarTerm(tport)) {
port = 0;
} else {
port = IntOfTerm(tport);
}
saddr.sin_port = htons(port);
saddr.sin_family = AF_INET;
if(bind(fd,(struct sockaddr *)&saddr, sizeof(saddr))==-1) {
#if HAVE_STRERROR
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_bind/2 (bind: %s)", strerror(socket_errno));
#else
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_bind/2 (bind)");
#endif
return(FALSE);
}
if (IsVarTerm(tport)) {
/* get the port number */
unsigned int namelen;
Term t;
if (getsockname(fd, (struct sockaddr *)&saddr, &namelen) < 0) {
#if HAVE_STRERROR
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_bind/2 (getsockname: %s)", strerror(socket_errno));
#else
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_bind/2 (getsockname)");
#endif
return(FALSE);
}
t = MkIntTerm(ntohs(saddr.sin_port));
Yap_unify(ArgOfTermCell(2, t2),t);
}
Yap_UpdateSocketStream(sno, server_socket, af_inet);
return(TRUE);
} else
return(FALSE);
}
static Int
p_socket_connect(void)
{
Term t1 = Deref(ARG1);
Term t2 = Deref(ARG2);
Functor fun;
int sno;
socket_info status;
int fd;
int flag;
Term out;
if ((sno = Yap_CheckSocketStream(t1, "socket_connect/3")) < 0) {
return (FALSE);
}
if (IsVarTerm(t2)) {
Yap_Error(INSTANTIATION_ERROR,t2,"socket_connect/3");
return(FALSE);
}
if (!IsApplTerm(t2)) {
Yap_Error(DOMAIN_ERROR_STREAM,t2,"socket_connect/3");
return(FALSE);
}
fun = FunctorOfTerm(t2);
fd = Yap_GetStreamFd(sno);
status = Yap_GetSocketStatus(sno);
if (status != new_socket) {
/* ok, this should be an error, as you are trying to bind */
return(FALSE);
}
#if HAVE_SYS_UN_H
if (fun == FunctorAfUnix) {
struct sockaddr_un sock;
Term taddr = ArgOfTerm(1, t2);
char *s;
int len;
if (IsVarTerm(taddr)) {
Yap_Error(INSTANTIATION_ERROR,t2,"socket_connect/3");
return(FALSE);
}
if (!IsAtomTerm(taddr)) {
Yap_Error(TYPE_ERROR_ATOM,taddr,"socket_connect/3");
return(FALSE);
}
s = RepAtom(AtomOfTerm(taddr))->StrOfAE;
sock.sun_family = AF_UNIX;
if ((len = strlen(s)) > 107) /* beat me with a broomstick */ {
Yap_Error(DOMAIN_ERROR_STREAM,taddr,"socket_connect/3");
return(FALSE);
}
sock.sun_family=AF_UNIX;
strcpy(sock.sun_path,s);
if ((flag = connect(fd,
(struct sockaddr *)(&sock),
((size_t) (((struct sockaddr_un *) 0)->sun_path) + len)))
< 0) {
#if HAVE_STRERROR
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_connect/3 (connect: %s)", strerror(socket_errno));
#else
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_connect/3 (connect)");
#endif
return(FALSE);
}
Yap_UpdateSocketStream(sno, client_socket, af_unix);
} else
#endif
if (fun == FunctorAfInet) {
Term thost = ArgOfTerm(1, t2);
Term tport = ArgOfTerm(2, t2);
char *shost;
struct hostent *he;
struct sockaddr_in saddr;
unsigned short int port;
struct linger ling; /* For making sockets linger. */
memset((void *)&saddr,(int) 0, sizeof(saddr));
if (IsVarTerm(thost)) {
Yap_Error(INSTANTIATION_ERROR,thost,"socket_connect/3");
return(FALSE);
} else if (!IsAtomTerm(thost)) {
Yap_Error(TYPE_ERROR_ATOM,thost,"socket_connect/3");
return(FALSE);
} else {
shost = RepAtom(AtomOfTerm(thost))->StrOfAE;
if((he=gethostbyname(shost))==NULL) {
#if HAVE_STRERROR
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_connect/3 (gethostbyname: %s)", strerror(socket_errno));
#else
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_connect/3 (gethostbyname)");
#endif
return(FALSE);
}
memcpy((void *)&saddr.sin_addr, (void *)he->h_addr_list[0], he->h_length);
}
if (IsVarTerm(tport)) {
Yap_Error(INSTANTIATION_ERROR,tport,"socket_connect/3");
return(FALSE);
} else if (!IsIntegerTerm(tport)) {
Yap_Error(TYPE_ERROR_INTEGER,tport,"socket_connect/3");
return(FALSE);
} else {
port = (unsigned short int)IntegerOfTerm(tport);
}
saddr.sin_port = htons(port);
saddr.sin_family = AF_INET;
ling.l_onoff = 1;
ling.l_linger = 0;
if (setsockopt(fd, SOL_SOCKET, SO_LINGER, (char *) &ling,
sizeof(ling)) < 0) {
#if HAVE_STRERROR
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_connect/3 (setsockopt_linger: %s)", strerror(socket_errno));
#else
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_connect/3 (setsockopt_linger)");
#endif
return(FALSE);
}
flag = connect(fd,(struct sockaddr *)&saddr, sizeof(saddr));
if(flag<0) {
#if HAVE_STRERROR
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_connect/3 (connect: %s)", strerror(socket_errno));
#else
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_connect/3 (connect)");
#endif
return(FALSE);
}
Yap_UpdateSocketStream(sno, client_socket, af_inet);
} else
return(FALSE);
out = t1;
return(Yap_unify(out,ARG3));
}
static Int
p_socket_listen(void)
{
Term t1 = Deref(ARG1);
Term t2 = Deref(ARG2);
int sno;
socket_info status;
int fd;
Int j;
if ((sno = Yap_CheckSocketStream(t1, "socket_listen/2")) < 0) {
return (FALSE);
}
if (IsVarTerm(t2)) {
Yap_Error(INSTANTIATION_ERROR,t2,"socket_listen/2");
return(FALSE);
}
if (!IsIntTerm(t2)) {
Yap_Error(TYPE_ERROR_INTEGER,t2,"socket_listen/2");
return(FALSE);
}
j = IntOfTerm(t2);
if (j < 0) {
Yap_Error(DOMAIN_ERROR_STREAM,t1,"socket_listen/2");
return(FALSE);
}
fd = Yap_GetStreamFd(sno);
status = Yap_GetSocketStatus(sno);
if (status != server_socket) {
/* ok, this should be an error, as you are trying to bind */
return(FALSE);
}
if (listen(fd,j) < 0) {
#if HAVE_STRERROR
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_listen/2 (listen: %s)", strerror(socket_errno));
#else
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_listen/2 (listen)");
#endif
}
return(TRUE);
}
static Int
p_socket_accept(void)
{
Term t1 = Deref(ARG1);
int sno;
socket_info status;
socket_domain domain;
int ofd, fd;
Term out;
if ((sno = Yap_CheckSocketStream(t1, "socket_accept/3")) < 0) {
return (FALSE);
}
ofd = Yap_GetStreamFd(sno);
status = Yap_GetSocketStatus(sno);
if (status != server_socket) {
/* ok, this should be an error, as you are trying to bind */
return(FALSE);
}
domain = Yap_GetSocketDomain(sno);
#if HAVE_SYS_UN_H
if (domain == af_unix) {
char tmp[sizeof(struct sockaddr_un)+107]; /* hit me with a broomstick */
struct sockaddr_in caddr;
unsigned int len;
len = sizeof(struct sockaddr_un)+107;
memset((void *)&caddr,(int) 0, len);
if ((fd=accept(ofd, (struct sockaddr *)tmp, &len)) < 0) {
#if HAVE_STRERROR
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_accept/3 (accept: %s)", strerror(socket_errno));
#else
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_accept/3 (accept)");
#endif
}
/* ignore 2nd argument */
out = Yap_InitSocketStream(fd, server_session_socket, af_unix );
} else
#endif
if (domain == af_inet) {
struct sockaddr_in caddr;
Term tcli;
char *s;
unsigned int len;
len = sizeof(caddr);
memset((void *)&caddr,(int) 0, sizeof(caddr));
if (invalid_socket_fd(fd=accept(ofd, (struct sockaddr *)&caddr, &len))) {
#if HAVE_STRERROR
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_accept/3 (accept: %s)", strerror(socket_errno));
#else
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_accept/3 (accept)");
#endif
return(FALSE);
}
if ((s = inet_ntoa(caddr.sin_addr)) == NULL) {
#if HAVE_STRERROR
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_accept/3 (inet_ntoa: %s)", strerror(socket_errno));
#else
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_accept/3 (inet_ntoa)");
#endif
}
tcli = MkAtomTerm(Yap_LookupAtom(s));
if (!Yap_unify(ARG2,tcli))
return(FALSE);
out = Yap_InitSocketStream(fd, server_session_socket, af_inet );
} else
return(FALSE);
if (out == TermNil) return(FALSE);
return(Yap_unify(out,ARG3));
}
static Int
p_socket_buffering(void)
{
Term t1 = Deref(ARG1);
Term t2 = Deref(ARG2);
Term t4 = Deref(ARG4);
Atom mode;
int fd;
int writing;
unsigned int bufsize, len;
int sno;
if ((sno = Yap_CheckSocketStream(t1, "socket_buffering/4")) < 0) {
return (FALSE);
}
if (IsVarTerm(t2)) {
Yap_Error(INSTANTIATION_ERROR,t2,"socket_buffering/4");
return(FALSE);
}
if (!IsAtomTerm(t2)) {
Yap_Error(TYPE_ERROR_ATOM,t2,"socket_buffering/4");
return(FALSE);
}
mode = AtomOfTerm(t2);
if (mode == AtomRead)
writing = FALSE;
else if (mode == AtomWrite)
writing = TRUE;
else {
Yap_Error(DOMAIN_ERROR_IO_MODE,t2,"socket_buffering/4");
return(FALSE);
}
fd = Yap_GetStreamFd(sno);
if (writing) {
getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &bufsize, &len);
} else {
getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &bufsize, &len);
}
if (!Yap_unify(ARG3,MkIntegerTerm(bufsize)))
return(FALSE);
if (IsVarTerm(t4)) {
bufsize = BUFSIZ;
} else {
Int siz;
if (!IsIntegerTerm(t4)) {
Yap_Error(TYPE_ERROR_INTEGER,t4,"socket_buffering/4");
return(FALSE);
}
siz = IntegerOfTerm(t4);
if (siz < 0) {
Yap_Error(DOMAIN_ERROR_NOT_LESS_THAN_ZERO,t4,"socket_buffering/4");
return(FALSE);
}
bufsize = siz;
}
if (writing) {
setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &bufsize, sizeof(bufsize));
} else {
setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &bufsize, sizeof(bufsize));
}
return(TRUE);
}
static Term
select_out_list(Term t1, fd_set *readfds_ptr)
{
if (t1 == TermNil) {
return(TermNil);
} else {
int fd;
int sno;
Term next = select_out_list(TailOfTerm(t1), readfds_ptr);
Term Head = HeadOfTerm(t1);
sno = Yap_CheckIOStream(Head,"stream_select/5");
fd = Yap_GetStreamFd(sno);
if (FD_ISSET(fd, readfds_ptr))
return(MkPairTerm(Head,next));
else
return(MkPairTerm(TermNil,next));
}
}
static Int
p_socket_select(void)
{
Term t1 = Deref(ARG1);
Term t2 = Deref(ARG2);
Term t3 = Deref(ARG3);
fd_set readfds, writefds, exceptfds;
struct timeval timeout, *ptime;
#if _MSC_VER || defined(__MINGW32__)
u_int fdmax=0;
#else
int fdmax=0;
#endif
Int tsec, tusec;
Term tout = TermNil, ti, Head;
if (IsVarTerm(t1)) {
Yap_Error(INSTANTIATION_ERROR,t1,"socket_select/5");
return(FALSE);
}
if (!IsPairTerm(t1)) {
Yap_Error(TYPE_ERROR_LIST,t1,"socket_select/5");
return(FALSE);
}
if (IsVarTerm(t2)) {
Yap_Error(INSTANTIATION_ERROR,t2,"socket_select/5");
return(FALSE);
}
if (!IsIntegerTerm(t2)) {
Yap_Error(TYPE_ERROR_INTEGER,t2,"socket_select/5");
return(FALSE);
}
if (IsVarTerm(t3)) {
Yap_Error(INSTANTIATION_ERROR,t3,"socket_select/5");
return(FALSE);
}
if (!IsIntegerTerm(t3)) {
Yap_Error(TYPE_ERROR_INTEGER,t3,"socket_select/5");
return(FALSE);
}
FD_ZERO(&readfds);
FD_ZERO(&writefds);
FD_ZERO(&exceptfds);
/* fetch the input streams */
ti = t1;
while (ti != TermNil) {
#if _MSC_VER || defined(__MINGW32__)
u_int fd;
#else
int fd;
#endif
int sno;
Head = HeadOfTerm(ti);
sno = Yap_CheckIOStream(Head,"stream_select/5");
if (sno < 0)
return(FALSE);
fd = Yap_GetStreamFd(sno);
FD_SET(fd, &readfds);
if (fd > fdmax)
fdmax = fd;
ti = TailOfTerm(ti);
}
/* now, check the time */
tsec = IntegerOfTerm(t2);
tusec = IntegerOfTerm(t3);
if (tsec < 0) /* off */ {
ptime = NULL;
} else {
timeout.tv_sec = tsec;
timeout.tv_usec = tusec;
ptime = &timeout;
}
/* do the real work */
if (select(fdmax+1, &readfds, &writefds, &exceptfds, ptime) < 0) {
#if HAVE_STRERROR
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_select/5 (select: %s)", strerror(socket_errno));
#else
Yap_Error(SYSTEM_ERROR, TermNil,
"socket_select/5 (select)");
#endif
}
tout = select_out_list(t1, &readfds);
/* we're done, just pass the info back */
return(Yap_unify(ARG4,tout));
}
static Int
p_current_host(void) {
char oname[MAXHOSTNAMELEN], *name;
Term t1 = Deref(ARG1), out;
if (!IsVarTerm(t1) && !IsAtomTerm(t1)) {
Yap_Error(TYPE_ERROR_ATOM,t1,"current_host/2");
return(FALSE);
}
name = oname;
if (gethostname(name, sizeof(oname)) < 0) {
#if HAVE_STRERROR
Yap_Error(SYSTEM_ERROR, TermNil,
"current_host/2 (gethostname: %s)", strerror(socket_errno));
#else
Yap_Error(SYSTEM_ERROR, TermNil,
"current_host/2 (gethostname)");
#endif
return(FALSE);
}
if ((strrchr(name,'.') == NULL)) {
struct hostent *he;
/* not a fully qualified name, ask the name server */
if((he=gethostbyname(name))==NULL) {
#if HAVE_STRERROR
Yap_Error(SYSTEM_ERROR, TermNil,
"current_host/2 (gethostbyname: %s)", strerror(socket_errno));
#else
Yap_Error(SYSTEM_ERROR, TermNil,
"current_host/2 (gethostbyname)");
#endif
return(FALSE);
}
name = (char *)(he->h_name);
}
if (IsAtomTerm(t1)) {
char *sin = RepAtom(AtomOfTerm(t1))->StrOfAE;
int faq = (strrchr(sin,'.') != NULL);
if (faq)
#if _MSC_VER || defined(__MINGW32__)
return(_stricmp(name,sin) == 0);
#else
return(strcasecmp(name,sin) == 0);
#endif
else {
int isize = strlen(sin);
if (isize >= 256) {
Yap_Error(SYSTEM_ERROR, ARG1,
"current_host/2 (input longer than longest FAQ host name)");
return(FALSE);
}
if (name[isize] != '.') return(FALSE);
name[isize] = '\0';
#if _MSC_VER || defined(__MINGW32__)
return(_stricmp(name,sin) == 0);
#else
return(strcasecmp(name,sin) == 0);
#endif
}
} else {
out = MkAtomTerm(Yap_LookupAtom(name));
return(Yap_unify(ARG1,out));
}
}
static Int
p_hostname_address(void) {
char *s;
Term t1 = Deref(ARG1);
Term t2 = Deref(ARG2);
Term tin, out;
struct hostent *he;
if (!IsVarTerm(t1)) {
if (!IsAtomTerm(t1)) {
Yap_Error(TYPE_ERROR_ATOM,t1,"hostname_address/2");
return(FALSE);
} else tin = t1;
} else if (IsVarTerm(t2)) {
Yap_Error(INSTANTIATION_ERROR,t1,"hostname_address/5");
return(FALSE);
} else if (!IsAtomTerm(t2)) {
Yap_Error(TYPE_ERROR_ATOM,t2,"hostname_address/2");
return(FALSE);
} else tin = t2;
s = RepAtom(AtomOfTerm(tin))->StrOfAE;
if (IsVarTerm(t1)) {
if ((he = gethostbyaddr(s, strlen(s), AF_INET)) == NULL) {
#if HAVE_STRERROR
Yap_Error(SYSTEM_ERROR, TermNil,
"hostname_address/2 (gethostbyname: %s)", strerror(socket_errno));
#else
Yap_Error(SYSTEM_ERROR, TermNil,
"hostname_address/2 (gethostbyname)");
#endif
}
out = MkAtomTerm(Yap_LookupAtom((char *)(he->h_name)));
return(Yap_unify(out, ARG1));
} else {
struct in_addr adr;
if ((he = gethostbyname(s)) == NULL) {
#if HAVE_STRERROR
Yap_Error(SYSTEM_ERROR, TermNil,
"hostname_address/2 (gethostbyname: %s)", strerror(socket_errno));
#else
Yap_Error(SYSTEM_ERROR, TermNil,
"hostname_address/2 (gethostbyname)");
#endif
}
memcpy((char *) &adr,
(char *) he->h_addr_list[0], (size_t) he->h_length);
out = MkAtomTerm(Yap_LookupAtom(inet_ntoa(adr)));
return(Yap_unify(out, ARG2));
}
}
#endif
void
Yap_InitSockets(void)
{
#ifdef USE_SOCKET
Yap_InitCPred("socket", 4, p_socket, SafePredFlag|SyncPredFlag);
Yap_InitCPred("socket_close", 1, p_socket_close, SafePredFlag|SyncPredFlag);
Yap_InitCPred("socket_bind", 2, p_socket_bind, SafePredFlag|SyncPredFlag);
Yap_InitCPred("socket_connect", 3, p_socket_connect, SafePredFlag|SyncPredFlag);
Yap_InitCPred("socket_listen", 2, p_socket_listen, SafePredFlag|SyncPredFlag);
Yap_InitCPred("socket_accept", 3, p_socket_accept, SafePredFlag|SyncPredFlag);
Yap_InitCPred("$socket_buffering", 4, p_socket_buffering, SafePredFlag|SyncPredFlag);
Yap_InitCPred("$socket_select", 4, p_socket_select, SafePredFlag|SyncPredFlag);
Yap_InitCPred("current_host", 1, p_current_host, SafePredFlag);
Yap_InitCPred("hostname_address", 2, p_hostname_address, SafePredFlag);
#if _MSC_VER || defined(__MINGW32__)
{
WSADATA info;
if (WSAStartup(MAKEWORD(2,1), &info) != 0)
exit(1);
}
#endif
#endif
}
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