The R13B03 release.OTP_R13B03

1 files changed, 457 insertions, 0 deletions

diff --git a/lib/erl_interface/src/legacy/erl_connect.c b/lib/erl_interface/src/legacy/erl_connect.c
new file mode 100644
index 0000000000..3c8c946506
--- /dev/null
+++ b/lib/erl_interface/src/legacy/erl_connect.c
@@ -0,0 +1,457 @@
+/*
+ * %CopyrightBegin%
+ * 
+ * Copyright Ericsson AB 1996-2009. All Rights Reserved.
+ * 
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ * 
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ * 
+ * %CopyrightEnd%
+ */
+/*
+ * Purpose: Connect to any node at any host.
+ */
+
+/***************************************************************************
+ *
+ *  'erl_interface' node connection handling is to use 'ei' for all
+ *  operations without access to the internal structure of saved data,
+ *  e.i. it should use the public interface functions. The connection
+ *  handling can be seen as a restricted node interface where only one
+ *  node can be used in one operating system process.
+ *
+ ***************************************************************************/
+
+#include "eidef.h"
+
+#include <stdlib.h>
+#include <sys/types.h>
+#include <fcntl.h>
+
+#ifdef __WIN32__
+#include <winsock2.h>
+#include <windows.h>
+#include <winbase.h>
+
+#elif VXWORKS
+#include <vxWorks.h>
+#include <hostLib.h>
+#include <selectLib.h>
+#include <ifLib.h>
+#include <sockLib.h>
+#include <taskLib.h>
+#include <inetLib.h>
+
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/times.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h> 
+#include <timers.h> 
+
+#include "erl_error.h"
+
+#else /* some other unix */
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/times.h>
+
+#if TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+#  include <sys/time.h>
+# else
+#  include <time.h>
+# endif
+#endif
+
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h> 
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <sys/utsname.h>  /* for gen_challenge (NEED FIX?) */
+#endif
+
+/* common includes */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+/* FIXME include less */
+#include "erl_interface.h"
+#include "erl_connect.h"
+#include "erl_eterm.h"
+#include "erl_malloc.h"
+#include "putget.h"
+#include "ei.h"
+#include "ei_connect_int.h"
+#include "ei_locking.h"
+#include "ei_epmd.h"
+#include "ei_internal.h"
+
+/* rpc_from() uses a buffer this size */
+#ifndef MAX_RECEIVE_BUF
+#define MAX_RECEIVE_BUF 32*1024
+#endif
+
+/* This is the global state of the old erl_* API */
+
+static ei_cnode erl_if_ec;
+
+/***************************************************************************
+ *
+ *  API: erl_connect_init()
+ *  API: erl_connect_xinit()
+ *
+ *  Returns 1 on success and 0 on failure.
+ *  Not documented to set erl_errno.
+ *
+ ***************************************************************************/
+
+int erl_connect_init(int this_node_number, char *cookie, short creation)
+{
+    char nn[MAXATOMLEN+1];
+
+    sprintf(nn, "c%d", this_node_number);
+
+    return ei_connect_init(&erl_if_ec, nn, cookie, creation) == 0;
+}
+
+/* FIXME documented to use struct in_addr as addr */
+
+int erl_connect_xinit(char *thishostname,
+		      char *thisalivename,
+		      char *thisnodename,
+		      struct in_addr *thisipaddr,
+		      char *cookie,
+		      short creation)
+{
+    return ei_connect_xinit(&erl_if_ec, thishostname, thisalivename,
+			    thisnodename, thisipaddr, cookie, creation) >= 0;
+}
+
+/***************************************************************************
+ *
+ *  API: erl_connect()
+ *  API: erl_xconnect()
+ *
+ *  Set up a connection to a given Node, and interchange hand shake
+ *  messages with it.
+ *
+ *  Returns valid file descriptor on success and < 0 on failure.
+ *  Set erl_errno to EHOSTUNREACH, ENOMEM, EIO or errno from socket(2)
+ *  or connect(2).
+ *
+ ***************************************************************************/
+
+int erl_connect(char *nodename)
+{
+  int res = ei_connect(&erl_if_ec, nodename);
+  if (res < 0) erl_errno = EIO;
+  return res;
+}
+
+/* FIXME documented to use struct in_addr as addr */
+
+int erl_xconnect(Erl_IpAddr addr, char *alivename)
+{
+    return ei_xconnect(&erl_if_ec, addr, alivename);
+}
+
+
+/***************************************************************************
+ *
+ *  API: erl_close_connection()
+ *
+ *  Close a connection. FIXME call ei_close_connection() later. 
+ *
+ *  Returns valid file descriptor on success and < 0 on failure.
+ *  Set erl_errno to EHOSTUNREACH, ENOMEM, EIO or errno from socket(2)
+ *  or connect(2).
+ *
+ ***************************************************************************/
+
+int erl_close_connection(int fd)
+{
+    return closesocket(fd);
+}
+
+/*
+ * Accept and initiate a connection from an other
+ * Erlang node. Return a file descriptor at success,
+ * otherwise -1;
+ */
+int erl_accept(int lfd, ErlConnect *conp)
+{
+    return ei_accept(&erl_if_ec, lfd, conp);
+}
+
+
+/* Receives a message from an Erlang socket.
+ * If the message was a TICK it is immediately
+ * answered. Returns: ERL_ERROR, ERL_TICK or
+ * the number of bytes read.
+ */
+int erl_receive(int s, unsigned char *bufp, int bufsize) 
+{
+    return ei_receive(s, bufp, bufsize);
+}
+
+/* 
+ * Send an Erlang message to a registered process
+ * at the Erlang node, connected with a socket.
+ */
+int erl_reg_send(int fd, char *server_name, ETERM *msg)
+{
+    ei_x_buff x;
+    int r;
+
+    ei_x_new_with_version(&x);
+    if (ei_x_encode_term(&x, msg) < 0) {
+	erl_errno = EINVAL;
+	r = 0;
+    } else {
+	r = ei_reg_send(&erl_if_ec, fd, server_name, x.buff, x.index);
+    }
+    ei_x_free(&x);
+    return r == 0;
+}
+
+/* 
+ * Sends an Erlang message to a process at an Erlang node
+ */
+int erl_send(int fd, ETERM *to ,ETERM *msg)
+{
+    erlang_pid topid;
+    ei_x_buff x;
+    int r;
+
+    ei_x_new_with_version(&x);
+    ei_x_encode_term(&x, msg);
+    /* make the to-pid */
+    if (!ERL_IS_PID(to)) {
+	ei_x_free(&x);
+	erl_errno = EINVAL;
+	return -1;
+    }
+    
+    strcpy(topid.node, (char *)ERL_PID_NODE(to));
+    topid.num = ERL_PID_NUMBER(to);
+    topid.serial = ERL_PID_SERIAL(to);
+    topid.creation = ERL_PID_CREATION(to);
+    r = ei_send(fd, &topid, x.buff, x.index);
+    ei_x_free(&x);
+    return r == 0;
+}
+
+static int erl_do_receive_msg(int fd, ei_x_buff* x, ErlMessage* emsg)
+{
+    erlang_msg msg;
+
+    int r;
+    msg.from.node[0] = msg.to.node[0] = '\0';
+    r = ei_do_receive_msg(fd, 0, &msg, x, 0);
+
+    if (r == ERL_MSG) {
+	int index = 0;
+	emsg->type = msg.msgtype;
+
+	/*
+	  We can't call ei_decode_term for cases where there are no
+	  data following the type information. If there are other
+	  types added later where there are data this case has to be
+	  extended.
+	*/
+
+	switch (msg.msgtype) {
+	case ERL_SEND:
+	case ERL_REG_SEND:
+	case ERL_EXIT:
+	case ERL_EXIT2:
+	  if (ei_decode_term(x->buff, &index, &emsg->msg) < 0)
+	    r = ERL_ERROR;
+	  break;
+	default:
+	  emsg->msg = NULL;	/* Not needed but may avoid problems for unsafe caller  */
+	  break;
+	}
+    } else
+	emsg->msg = NULL;
+    if (msg.from.node[0] != '\0')
+	emsg->from = erl_mk_pid(msg.from.node, msg.from.num, msg.from.serial, msg.from.creation);
+    if (msg.to.node[0] != '\0')
+	emsg->to = erl_mk_pid(msg.to.node, msg.to.num, msg.to.serial, msg.to.creation);
+    return r;
+}
+
+int erl_receive_msg(int fd, unsigned char *buf, int bufsize, ErlMessage *emsg)
+{
+    ei_x_buff x;
+    int r;
+
+    ei_x_new(&x);
+    r = erl_do_receive_msg(fd, &x, emsg);
+    /* FIXME what is this about? */
+    if (bufsize > x.index)
+	bufsize = x.index;
+    memcpy(buf, x.buff, bufsize);
+    ei_x_free(&x);
+    return r;
+}
+
+int erl_xreceive_msg(int fd, unsigned char **buf, int *bufsize,
+		  ErlMessage *emsg)
+{
+    ei_x_buff x;
+    int r;
+
+    ei_x_new(&x);
+    r = erl_do_receive_msg(fd, &x, emsg);
+    if (*bufsize < x.index)
+	*buf = erl_realloc(*buf, x.index);
+    *bufsize = x.index;
+    memcpy(*buf, x.buff, *bufsize);
+    ei_x_free(&x);
+    return r;
+}
+
+/* 
+ * The RPC consists of two parts, send and receive.
+ * Here is the send part ! 
+ * { PidFrom, { call, Mod, Fun, Args, user }} 
+ */
+/*
+ * Now returns non-negative number for success, negative for failure.
+ */
+int erl_rpc_to(int fd, char *mod, char *fun, ETERM *args)
+{
+    int r;
+    ei_x_buff x;
+
+    ei_x_new(&x);
+    ei_x_encode_term(&x, args);
+    r = ei_rpc_to(&erl_if_ec, fd, mod, fun, x.buff, x.index);
+    ei_x_free(&x);
+    return r;
+} /* rpc_to */
+
+  /*
+  * And here is the rpc receiving part. A negative
+  * timeout means 'infinity'. Returns either of: ERL_MSG,
+  * ERL_TICK, ERL_ERROR or ERL_TIMEOUT.
+*/
+int erl_rpc_from(int fd, int timeout, ErlMessage *emsg) 
+{
+    fd_set readmask;
+    struct timeval tv;
+    struct timeval *t = NULL;
+    unsigned char rbuf[MAX_RECEIVE_BUF];    
+    
+    if (timeout >= 0) {
+	tv.tv_sec = timeout / 1000;
+	tv.tv_usec = (timeout % 1000) * 1000;
+	t = &tv;
+    }
+    
+    FD_ZERO(&readmask);
+    FD_SET(fd,&readmask);
+    
+    switch (select(fd+1, &readmask, NULL, NULL, t)) {
+    case -1: 
+	erl_errno = EIO;
+	return ERL_ERROR;
+    case 0:
+	erl_errno = ETIMEDOUT;
+	return ERL_TIMEOUT;
+    default:
+	if (FD_ISSET(fd, &readmask)) 
+	    return erl_receive_msg(fd, rbuf, MAX_RECEIVE_BUF, emsg);
+	else {
+	    erl_errno = EIO;
+	    return ERL_ERROR;
+	}
+    }
+} /* rpc_from */
+
+/*
+ * A true RPC. It return a NULL pointer
+ * in case of failure, otherwise a valid
+ * (ETERM *) pointer containing the reply
+ */
+ETERM *erl_rpc(int fd, char *mod, char *fun, ETERM *args)
+{
+    int i;
+    ETERM *ep;
+    ErlMessage emsg;
+    
+    if (erl_rpc_to(fd, mod, fun, args) < 0) {
+	return NULL; }
+    while ((i=erl_rpc_from(fd, ERL_NO_TIMEOUT, &emsg)) == ERL_TICK);
+    
+    if (i == ERL_ERROR)  return NULL;
+    
+    ep = erl_element(2,emsg.msg); /* {RPC_Tag, RPC_Reply} */
+    erl_free_term(emsg.msg);
+    erl_free_term(emsg.to);
+    return ep;
+} /* rpc */
+
+
+/*
+ ** Handshake
+ */
+
+int erl_publish(int port)
+{
+    return ei_publish(&erl_if_ec, port);
+} 
+
+int erl_unpublish(const char *alive)
+{
+    return ei_unpublish_tmo(alive,0);
+}
+
+erlang_pid *erl_self(void)
+{
+    return ei_self(&erl_if_ec);
+}
+
+const char *erl_thisnodename(void)
+{
+    return ei_thisnodename(&erl_if_ec);
+}
+
+const char *erl_thishostname(void)
+{
+    return ei_thishostname(&erl_if_ec);
+}
+
+const char *erl_thisalivename(void)
+{
+    return ei_thisalivename(&erl_if_ec);
+}
+
+const char *erl_thiscookie(void)
+{
+    return ei_thiscookie(&erl_if_ec);
+}
+
+short erl_thiscreation(void)
+{
+    return ei_thiscreation(&erl_if_ec);
+}