1260 lines
31 KiB
C
1260 lines
31 KiB
C
/*************************************************************************
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* *
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* YAP Prolog %W% %G%
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* *
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* Yap Prolog was developed at NCCUP - Universidade do Porto *
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* *
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* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
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* *
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**************************************************************************
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* *
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* File: io.h *
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* Last rev: 19/2/88 *
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* mods: *
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* comments: control YAP from sockets. *
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* *
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*************************************************************************/
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#include "Yap.h"
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#include "Yatom.h"
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#include "Heap.h"
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#include "yapio.h"
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#if USE_SOCKET
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#if HAVE_UNISTD_H && !defined(__MINGW32__) && !_MSC_VER
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#include <unistd.h>
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#endif
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#if STDC_HEADERS
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#include <stdlib.h>
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#endif
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#if HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#if HAVE_SYS_TIME_H && !defined(__MINGW32__) && !_MSC_VER
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#include <sys/time.h>
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#endif
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#ifdef _WIN32
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#if HAVE_IO_H
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#include <io.h>
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#endif
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#endif
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#if _MSC_VER || defined(__MINGW32__)
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#include <io.h>
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#include <winsock2.h>
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#else
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#if HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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#if HAVE_SYS_UN_H
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#include <sys/un.h>
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#endif
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#if HAVE_NETDB_H
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#include <netdb.h>
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#endif
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#if HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#if HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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#if HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#if HAVE_STRING_H
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#include <string.h>
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#endif
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#if HAVE_SYS_SELECT_H
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#include <sys/select.h>
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#endif
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#if HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#endif
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#endif
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/* make sure we can compile in any platform */
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#ifndef AF_UNSPEC
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#define AF_UNSPEC 0
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#endif
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#ifndef AF_LOCAL
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#define AF_LOCAL AF_UNSPEC
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#endif
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#ifndef AF_AAL5
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#define AF_AAL5 AF_UNSPEC
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#endif
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#ifndef AF_APPLETALK
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#define AF_APPLETALK AF_UNSPEC
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#endif
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#ifndef AF_AX25
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#define AF_AX25 AF_UNSPEC
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#endif
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#ifndef AF_BRIDGE
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#define AF_BRIDGE AF_UNSPEC
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#endif
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#ifndef AF_DECnet
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#define AF_DECnet AF_UNSPEC
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#endif
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#ifndef AF_FILE
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#define AF_FILE AF_UNSPEC
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#endif
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#ifndef AF_INET
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#define AF_INET AF_UNSPEC
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#endif
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#ifndef AF_INET6
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#define AF_INET6 AF_UNSPEC
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#endif
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#ifndef AF_IPX
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#define AF_IPX AF_UNSPEC
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#endif
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#ifndef AF_LOCAL
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#define AF_LOCAL AF_UNSPEC
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#endif
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#ifndef AF_NETBEUI
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#define AF_NETBEUI AF_UNSPEC
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#endif
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#ifndef AF_NETLINK
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#define AF_NETLINK AF_UNSPEC
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#endif
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#ifndef AF_NETROM
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#define AF_NETROM AF_UNSPEC
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#endif
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#ifndef AF_OSINET
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#define AF_OSINET AF_UNSPEC
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#endif
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#ifndef AF_PACKET
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#define AF_PACKET AF_UNSPEC
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#endif
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#ifndef AF_ROSE
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#define AF_ROSE AF_UNSPEC
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#endif
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#ifndef AF_ROUTE
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#define AF_ROUTE AF_UNSPEC
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#endif
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#ifndef AF_SECURITY
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#define AF_SECURITY AF_UNSPEC
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#endif
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#ifndef AF_SNA
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#define AF_SNA AF_UNSPEC
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#endif
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#ifndef AF_UNIX
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#define AF_UNIX AF_UNSPEC
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#endif
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#ifndef AF_X25
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#define AF_X25 AF_UNSPEC
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#endif
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#ifndef SOCK_STREAM
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#define SOCK_STREAM -1
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#endif
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#ifndef SOCK_DGRAM
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#define SOCK_DGRAM -1
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#endif
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#ifndef SOCK_RAW
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#define SOCK_RAW -1
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#endif
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#ifndef SOCK_RDM
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#define SOCK_RDM -1
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#endif
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#ifndef SOCK_SEQPACKET
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#define SOCK_SEQPACKET -1
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#endif
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#ifndef SOCK_PACKET
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#define SOCK_PACKET -1
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#endif
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#ifndef MAXHOSTNAMELEN
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#define MAXHOSTNAMELEN 256
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#endif
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#ifndef BUFSIZ
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#define BUFSIZ 256
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#endif
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#if _MSC_VER || defined(__MINGW32__)
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#define socket_errno WSAGetLastError()
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#define invalid_socket_fd(fd) (fd) == INVALID_SOCKET
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#else
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#define socket_errno errno
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#define invalid_socket_fd(fd) (fd) < 0
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#endif
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void
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Yap_init_socks(char *host, long interface_port)
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{
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int s;
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int r;
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struct sockaddr_in soadr;
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struct in_addr adr;
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struct hostent *he;
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struct linger ling; /* For making sockets linger. */
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#if USE_SOCKET
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he = gethostbyname(host);
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if (he == NULL) {
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#if HAVE_STRERROR
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Yap_Error(SYSTEM_ERROR, TermNil, "can not get address for host %s: %s", host, strerror(h_errno));
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#else
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Yap_Error(SYSTEM_ERROR, TermNil, "can not get address for host");
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#endif
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return;
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}
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(void) memset((void *) &soadr, '\0', sizeof(struct sockaddr_in));
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soadr.sin_family = AF_INET;
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soadr.sin_port = htons((short) interface_port);
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if (he != NULL) {
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memcpy((char *) &adr,
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(char *) he->h_addr_list[0], (size_t) he->h_length);
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} else {
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adr.s_addr = inet_addr(host);
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}
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soadr.sin_addr.s_addr = adr.s_addr;
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s = socket ( AF_INET, SOCK_STREAM, 0);
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if (s<0) {
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#if HAVE_STRERROR
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Yap_Error(SYSTEM_ERROR, TermNil, "could not create socket: %s", strerror(errno));
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#else
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Yap_Error(SYSTEM_ERROR, TermNil, "could not create socket");
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#endif
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return;
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}
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ling.l_onoff = 1;
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ling.l_linger = 0;
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setsockopt(s, SOL_SOCKET, SO_LINGER, (void *) &ling,
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sizeof(ling));
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r = connect ( s, (struct sockaddr *) &soadr, sizeof(soadr));
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if (r<0) {
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#if HAVE_STRERROR
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Yap_Error(SYSTEM_ERROR, TermNil, "connect failed, could not connect to interface: %s", strerror(errno));
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#else
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Yap_Error(SYSTEM_ERROR, TermNil, "connect failed, could not connect to interface");
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#endif
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return;
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}
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/* now reopen stdin stdout and stderr */
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#if HAVE_DUP2 && !defined(__MINGW32__)
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if(dup2(s,0)<0) {
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#if HAVE_STRERROR
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Yap_Error(SYSTEM_ERROR, TermNil, "could not dup2 stdin: %s", strerror(errno));
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#else
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Yap_Error(SYSTEM_ERROR, TermNil, "could not dup2 stdin");
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#endif
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return;
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}
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if(dup2(s,1)<0) {
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#if HAVE_STRERROR
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Yap_Error(SYSTEM_ERROR, TermNil, "could not dup2 stdout: %s", strerror(errno));
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#else
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Yap_Error(SYSTEM_ERROR, TermNil, "could not dup2 stdout");
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#endif
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return;
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}
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if(dup2(s,2)<0) {
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#if HAVE_STRERROR
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Yap_Error(SYSTEM_ERROR, TermNil, "could not dup2 stderr: %s", strerror(errno));
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#else
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Yap_Error(SYSTEM_ERROR, TermNil, "could not dup2 stderr");
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#endif
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return;
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}
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#elif _MSC_VER || defined(__MINGW32__)
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if(_dup2(s,0)<0) {
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fprintf(stderr,"could not dup2 stdin\n");
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return;
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}
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if(_dup2(s,1)<0) {
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fprintf(stderr,"could not dup2 stdout\n");
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return;
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}
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if(_dup2(s,2)<0) {
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fprintf(stderr,"could not dup2 stderr\n");
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return;
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}
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#else
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if(dup2(s,0)<0) {
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fprintf(stderr,"could not dup2 stdin\n");
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return;
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}
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yp_iob[0].cnt = 0;
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yp_iob[0].flags = _YP_IO_SOCK | _YP_IO_READ;
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if(dup2(s,1)<0) {
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fprintf(stderr,"could not dup2 stdout\n");
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return;
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}
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yp_iob[1].cnt = 0;
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yp_iob[1].flags = _YP_IO_SOCK | _YP_IO_WRITE;
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if(dup2(s,2)<0) {
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fprintf(stderr,"could not dup2 stderr\n");
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return;
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}
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yp_iob[2].cnt = 0;
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yp_iob[2].flags = _YP_IO_SOCK | _YP_IO_WRITE;
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#endif
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Yap_sockets_io = 1;
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#if _MSC_VER || defined(__MINGW32__)
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_close(s);
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#else
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close(s);
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#endif
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#else /* USE_SOCKET */
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Yap_Error(SYSTEM_ERROR, TermNil, "sockets not installed", strerror(errno));
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#endif /* USE_SOCKET */
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}
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static Int
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p_socket(void)
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{
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Term t1 = Deref(ARG1);
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Term t2 = Deref(ARG2);
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Term t3 = Deref(ARG3);
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char *sdomain, *stype;
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Int domain = AF_UNSPEC, type, protocol;
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int fd;
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Term out;
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if (IsVarTerm(t1)) {
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Yap_Error(INSTANTIATION_ERROR,t1,"socket/4");
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return(FALSE);
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}
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if (!IsAtomTerm(t1)) {
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Yap_Error(TYPE_ERROR_ATOM,t1,"socket/4");
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return(FALSE);
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}
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if (IsVarTerm(t2)) {
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Yap_Error(INSTANTIATION_ERROR,t2,"socket/4");
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return(FALSE);
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}
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if (!IsAtomTerm(t2)) {
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Yap_Error(TYPE_ERROR_ATOM,t2,"socket/4");
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return(FALSE);
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}
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if (IsVarTerm(t3)) {
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Yap_Error(INSTANTIATION_ERROR,t3,"socket/4");
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return(FALSE);
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}
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if (!IsIntTerm(t3)) {
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Yap_Error(TYPE_ERROR_ATOM,t3,"socket/4");
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return(FALSE);
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}
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sdomain = RepAtom(AtomOfTerm(t1))->StrOfAE;
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if (sdomain[0] != 'A' || sdomain[1] != 'F' || sdomain[2] != '_')
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return(FALSE); /* Error */
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sdomain += 3;
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switch (sdomain[0]) {
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case 'A':
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if (strcmp(sdomain, "AAL5") == 0)
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domain = AF_AAL5;
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else if (strcmp(sdomain, "APPLETALK") == 0)
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domain = AF_APPLETALK;
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else if (strcmp(sdomain, "AX25") == 0)
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domain = AF_AX25;
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break;
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case 'B':
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if (strcmp(sdomain, "BRIDGE") == 0)
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domain = AF_APPLETALK;
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break;
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case 'D':
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if (strcmp(sdomain, "DECnet") == 0)
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domain = AF_DECnet;
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break;
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case 'F':
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if (strcmp(sdomain, "FILE") == 0)
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domain = AF_FILE;
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break;
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case 'I':
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if (strcmp(sdomain, "INET") == 0)
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domain = AF_INET;
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else if (strcmp(sdomain, "INET6") == 0)
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domain = AF_INET6;
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else if (strcmp(sdomain, "IPX") == 0)
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domain = AF_IPX;
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break;
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case 'L':
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if (strcmp(sdomain, "LOCAL") == 0)
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domain = AF_LOCAL;
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break;
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case 'N':
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if (strcmp(sdomain, "NETBEUI") == 0)
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domain = AF_NETBEUI;
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else if (strcmp(sdomain, "NETLINK") == 0)
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domain = AF_NETLINK;
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else if (strcmp(sdomain, "NETROM") == 0)
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domain = AF_NETROM;
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break;
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case 'O':
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if (strcmp(sdomain, "OSINET") == 0)
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domain = AF_OSINET;
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break;
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case 'P':
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if (strcmp(sdomain, "PACKET") == 0)
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domain = AF_PACKET;
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break;
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case 'R':
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if (strcmp(sdomain, "ROSE") == 0)
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domain = AF_ROSE;
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else if (strcmp(sdomain, "ROUTE") == 0)
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domain = AF_ROUTE;
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break;
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case 'S':
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if (strcmp(sdomain, "SECURITY") == 0)
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domain = AF_SECURITY;
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else if (strcmp(sdomain, "SNA") == 0)
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domain = AF_SNA;
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break;
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case 'U':
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if (strcmp(sdomain, "UNIX") == 0)
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domain = AF_UNIX;
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break;
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case 'X':
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if (strcmp(sdomain, "X25") == 0)
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domain = AF_X25;
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break;
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}
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stype = RepAtom(AtomOfTerm(t2))->StrOfAE;
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if (stype[0] != 'S' || stype[1] != 'O' || stype[2] != 'C' || stype[3] != 'K' || stype[4] != '_')
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return(FALSE); /* Error */
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stype += 5;
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if (strcmp(stype,"STREAM") == 0)
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type = SOCK_STREAM;
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else if (strcmp(stype,"DGRAM") == 0)
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type = SOCK_DGRAM;
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else if (strcmp(stype,"RAW") == 0)
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type = SOCK_RAW;
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else if (strcmp(stype,"RDM") == 0)
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type = SOCK_RDM;
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else if (strcmp(stype,"SEQPACKET") == 0)
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type = SOCK_SEQPACKET;
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else if (strcmp(stype,"PACKET") == 0)
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type = SOCK_PACKET;
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else
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return(FALSE);
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protocol = IntOfTerm(t3);
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if (protocol < 0)
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return(FALSE);
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fd = socket(domain, type, protocol);
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if (invalid_socket_fd(fd)) {
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#if HAVE_STRERROR
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Yap_Error(SYSTEM_ERROR, TermNil,
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"socket/4 (socket: %s)", strerror(socket_errno));
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#else
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Yap_Error(SYSTEM_ERROR, TermNil,
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"socket/4 (socket)");
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#endif
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return(FALSE);
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}
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if (domain == AF_UNIX || domain == AF_LOCAL )
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out = Yap_InitSocketStream(fd, new_socket, af_unix);
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else if (domain == AF_INET )
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out = Yap_InitSocketStream(fd, new_socket, af_inet);
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else {
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/* ok, we currently don't support these sockets */
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#if _MSC_VER || defined(__MINGW32__)
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_close(fd);
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#else
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close(fd);
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#endif
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return(FALSE);
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}
|
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if (out == TermNil) return(FALSE);
|
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return(Yap_unify(out,ARG4));
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}
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|
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Int
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Yap_CloseSocket(int fd, socket_info status, socket_domain domain)
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{
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#if _MSC_VER || defined(__MINGW32__)
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/* prevent further writing
|
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to the socket */
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if (status == server_session_socket ||
|
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status == client_socket) {
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char bfr;
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|
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if (shutdown(fd, 1) != 0) {
|
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Yap_Error(SYSTEM_ERROR, TermNil,
|
|
"socket_close/1 (close)");
|
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return(FALSE);
|
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}
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/* read all pending characters
|
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from the socket */
|
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while( recv( fd, &bfr, 1, 0 ) > 0 );
|
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/* prevent further reading
|
|
from the socket */
|
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if (shutdown(fd, 0) < 0) {
|
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Yap_Error(SYSTEM_ERROR, TermNil,
|
|
"socket_close/1 (close)");
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return(FALSE);
|
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}
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|
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/* close the socket */
|
|
if (closesocket(fd) != 0) {
|
|
#if HAVE_STRERROR
|
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Yap_Error(SYSTEM_ERROR, TermNil,
|
|
"socket_close/1 (close: %s)", strerror(socket_errno));
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#else
|
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Yap_Error(SYSTEM_ERROR, TermNil,
|
|
"socket_close/1 (close)");
|
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#endif
|
|
}
|
|
#else
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if (status == server_session_socket ||
|
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status == client_socket) {
|
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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, (void *) &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) {
|
|
struct sockaddr_un caddr;
|
|
unsigned int len;
|
|
|
|
memset((void *)&caddr,(int) 0, sizeof(caddr));
|
|
if ((fd=accept(ofd, (struct sockaddr *)&caddr, &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, (void *)&bufsize, &len);
|
|
} else {
|
|
getsockopt(fd, SOL_SOCKET, SO_RCVBUF, (void *)&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, (void *)&bufsize, sizeof(bufsize));
|
|
} else {
|
|
setsockopt(fd, SOL_SOCKET, SO_RCVBUF, (void *)&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("$socket_buffering", 4, p_socket_buffering, SafePredFlag|SyncPredFlag|HiddenPredFlag);
|
|
Yap_InitCPred("$socket_select", 4, p_socket_select, SafePredFlag|SyncPredFlag|HiddenPredFlag);
|
|
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
|
|
}
|
|
|