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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1998-2009. 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%
*/
#include "eidef.h"
#ifdef __WIN32__
#include <winsock2.h>
#include <windows.h>
#include <winbase.h>
#elif VXWORKS
#include <vxWorks.h>
#include <ifLib.h>
#include <sockLib.h>
#include <inetLib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#else
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#endif
#include <stdlib.h>
#include <string.h>
#include "ei_internal.h"
#include "putget.h"
#include "ei_epmd.h"
#include "ei_portio.h"
/* publish our listen port and alive name */
/* return the (useless) creation number */
static int ei_epmd_r3_publish (int port, const char *alive, unsigned ms)
{
char buf[EPMDBUF];
char *s = buf;
int fd;
int len = strlen(alive) + 3;
int res,creation;
s = buf;
put16be(s,len);
put8(s,EI_EPMD_ALIVE_REQ);
put16be(s,port);
strcpy(s, alive);
if ((fd = ei_epmd_connect_tmo(NULL,ms)) < 0) return fd;
if ((res = ei_write_fill_t(fd, buf, len+2, ms)) != len+2) {
closesocket(fd);
erl_errno = (res == -2) ? ETIMEDOUT : EIO;
return -1;
}
EI_TRACE_CONN2("ei_epmd_r3_publish",
"-> ALIVE_REQ alive=%s port=%d",alive,port);
if ((res = ei_read_fill_t(fd, buf, 3, ms)) != 3) {
closesocket(fd);
erl_errno = (res == -2) ? ETIMEDOUT : EIO;
return -1;
}
s = buf;
if ((res=get8(s)) != EI_EPMD_ALIVE_OK_RESP) {
EI_TRACE_ERR1("ei_epmd_r3_publish",
"<- ALIVE_NOK result=%d (failure)",res);
closesocket(fd);
erl_errno = EIO;
return -1;
}
creation = get16be(s);
EI_TRACE_CONN1("ei_epmd_r3_publish","<- ALIVE_OK creation=%d",creation);
/* Don't close fd here! It keeps us registered with epmd */
/* probably should save fd so we can close it later... */
/* epmd_saveconn(OPEN,fd,alive); */
/* return the creation number, for no good reason */
/* return creation; */
/* no! return the descriptor */
return fd;
}
/* publish our listen port and alive name */
/* return the (useless) creation number */
/* this protocol is a lot more complex than the old one */
static int ei_epmd_r4_publish (int port, const char *alive, unsigned ms)
{
char buf[EPMDBUF];
char *s = buf;
int fd;
int elen = 0;
int nlen = strlen(alive);
int len = elen + nlen + 13; /* hard coded: be careful! */
int n;
int res, creation;
s = buf;
put16be(s,len);
put8(s,EI_EPMD_ALIVE2_REQ);
put16be(s,port); /* port number */
put8(s,'h'); /* h = r4 hidden node */
put8(s, EI_MYPROTO); /* protocol 0 ?? */
put16be(s,EI_DIST_HIGH); /* highest understood version: 1 = R4 */
put16be(s,EI_DIST_LOW); /* lowest: 0 = R3 */
put16be(s,nlen); /* length of alivename */
strcpy(s, alive);
s += nlen;
put16be(s,elen); /* length of extra string = 0 */
/* no extra string */
if ((fd = ei_epmd_connect_tmo(NULL,ms)) < 0) return fd;
if ((res = ei_write_fill_t(fd, buf, len+2, ms)) != len+2) {
closesocket(fd);
erl_errno = (res == -2) ? ETIMEDOUT : EIO;
return -1;
}
EI_TRACE_CONN6("ei_epmd_r4_publish",
"-> ALIVE2_REQ alive=%s port=%d ntype=%d "
"proto=%d dist-high=%d dist-low=%d",
alive,port,'H',EI_MYPROTO,EI_DIST_HIGH,EI_DIST_LOW);
if ((n = ei_read_fill_t(fd, buf, 4, ms)) != 4) {
EI_TRACE_ERR0("ei_epmd_r4_publish","<- CLOSE");
closesocket(fd);
erl_errno = (n == -2) ? ETIMEDOUT : EIO;
return -2; /* version mismatch */
}
/* Don't close fd here! It keeps us registered with epmd */
s = buf;
if (((res=get8(s)) != EI_EPMD_ALIVE2_RESP)) { /* response */
EI_TRACE_ERR1("ei_epmd_r4_publish","<- unknown (%d)",res);
EI_TRACE_ERR0("ei_epmd_r4_publish","-> CLOSE");
closesocket(fd);
erl_errno = EIO;
return -1;
}
EI_TRACE_CONN0("ei_epmd_r4_publish","<- ALIVE2_RESP");
if (((res=get8(s)) != 0)) { /* 0 == success */
EI_TRACE_ERR1("ei_epmd_r4_publish"," result=%d (fail)",res);
closesocket(fd);
erl_errno = EIO;
return -1;
}
creation = get16be(s);
EI_TRACE_CONN2("ei_epmd_r4_publish",
" result=%d (ok) creation=%d",res,creation);
/* probably should save fd so we can close it later... */
/* epmd_saveconn(OPEN,fd,alive); */
/* return the creation number, for no good reason */
/* return creation;*/
/* no - return the descriptor */
return fd;
}
int ei_epmd_publish(int port, const char *alive)
{
return ei_epmd_publish_tmo(port, alive, 0);
}
int ei_epmd_publish_tmo(int port, const char *alive, unsigned ms)
{
int i;
/* try the new one first, then the old one */
i = ei_epmd_r4_publish(port,alive, ms);
/* -2: new protocol not understood */
if (i == -2) i = ei_epmd_r3_publish(port,alive, ms);
return i;
}
/*
* Publish a name for our C-node.
* a file descriptor is returned - close it to unpublish.
*
*/
int ei_publish(ei_cnode* ec, int port)
{
return ei_epmd_publish(port, ei_thisalivename(ec));
}
int ei_publish_tmo(ei_cnode* ec, int port, unsigned ms)
{
return ei_epmd_publish_tmo(port, ei_thisalivename(ec), ms);
}
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