aboutsummaryrefslogtreecommitdiffstats
path: root/lib/erl_interface/src/epmd/epmd_publish.c
diff options
context:
space:
mode:
authorErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
committerErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
commit84adefa331c4159d432d22840663c38f155cd4c1 (patch)
treebff9a9c66adda4df2106dfd0e5c053ab182a12bd /lib/erl_interface/src/epmd/epmd_publish.c
downloadotp-84adefa331c4159d432d22840663c38f155cd4c1.tar.gz
otp-84adefa331c4159d432d22840663c38f155cd4c1.tar.bz2
otp-84adefa331c4159d432d22840663c38f155cd4c1.zip
The R13B03 release.OTP_R13B03
Diffstat (limited to 'lib/erl_interface/src/epmd/epmd_publish.c')
-rw-r--r--lib/erl_interface/src/epmd/epmd_publish.c228
1 files changed, 228 insertions, 0 deletions
diff --git a/lib/erl_interface/src/epmd/epmd_publish.c b/lib/erl_interface/src/epmd/epmd_publish.c
new file mode 100644
index 0000000000..09b3dce43b
--- /dev/null
+++ b/lib/erl_interface/src/epmd/epmd_publish.c
@@ -0,0 +1,228 @@
+/*
+ * %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);
+}