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authorPatrik Nyblom <[email protected]>2010-08-24 12:09:17 +0200
committerPatrik Nyblom <[email protected]>2010-08-31 15:42:52 +0200
commit6499bf2816c3834059ebdeff75d98f310cb305b4 (patch)
treefab5c1113c3377b262b0ae2c59089373f68d8985 /erts/epmd/src
parentd6559386aaf37419864885bcd6bf43a9af8480b7 (diff)
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Remove very old protocol from EPMD
Diffstat (limited to 'erts/epmd/src')
-rw-r--r--erts/epmd/src/epmd.h21
-rw-r--r--erts/epmd/src/epmd_srv.c132
2 files changed, 9 insertions, 144 deletions
diff --git a/erts/epmd/src/epmd.h b/erts/epmd/src/epmd.h
index 9e939ee38e..5d6e9ac165 100644
--- a/erts/epmd/src/epmd.h
+++ b/erts/epmd/src/epmd.h
@@ -1,7 +1,7 @@
/*
* %CopyrightBegin%
*
- * Copyright Ericsson AB 1998-2009. All Rights Reserved.
+ * Copyright Ericsson AB 1998-2010. 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
@@ -17,21 +17,18 @@
* %CopyrightEnd%
*/
-/* The port number is now defined in a makefile */
+/* The port number is defined in a makefile */
/* Definitions of message codes */
-#define EPMD_ALIVE_REQ 'a'
-#define EPMD_ALIVE_OK_RESP 'Y'
-#define EPMD_PORT_REQ 'p'
+/* Registration and queries */
+#define EPMD_ALIVE2_REQ 'x'
+#define EPMD_PORT2_REQ 'z'
+#define EPMD_ALIVE2_RESP 'y'
+#define EPMD_PORT2_RESP 'w'
#define EPMD_NAMES_REQ 'n'
+
+/* Interactive client command codes */
#define EPMD_DUMP_REQ 'd'
#define EPMD_KILL_REQ 'k'
#define EPMD_STOP_REQ 's'
-
-/* New epmd messages */
-
-#define EPMD_ALIVE2_REQ 'x' /* 120 */
-#define EPMD_PORT2_REQ 'z' /* 122 */
-#define EPMD_ALIVE2_RESP 'y' /* 121 */
-#define EPMD_PORT2_RESP 'w' /* 119 */
diff --git a/erts/epmd/src/epmd_srv.c b/erts/epmd/src/epmd_srv.c
index c836bf0bb7..12ebd7f415 100644
--- a/erts/epmd/src/epmd_srv.c
+++ b/erts/epmd/src/epmd_srv.c
@@ -47,38 +47,6 @@
* | Length | Request |
* +--------+---------+
*
- * In all but one case there is only one request for each connection made
- * to this server so we can safely close the socket after sending the
- * reply. The exception is ALIVE_REQ where we keep the connection
- * open without sending any data. When we receive a "close" this is
- * an indication that the Erlang node was terminated. The termination
- * may have been "normal" or caused by a crash. The operating system
- * ensure that the connection is closed either way.
- *
- * Reading is done non-blocking, i.e. we call a "read" only if we are
- * told by the "select" function that there are data to read.
- *
- * Two databases are used: One node database where the registered names
- * of the nodes are stored, and one connection database where the state
- * of sockets and the data buffers is stored.
- *
- * Incomplete packets are thrown away after a timout. The Erlang node
- * doing the request is responsible for completing in it in a reasonable time.
- *
- * Note that if the server gets busy it may not have time to
- * process all requests for connection. The "accept()" function
- * will on most operating systems silently refuse to accept more
- * than 5 outstanding requests. It is the client's responsibility
- * to retry the request a number of times with random time interval.
- * The "-debug" flag will insert a delay so you can test this
- * behaviour.
- *
- * FIXME: In this code we assume that the packets we send on each
- * socket is so small that a "write()" never block
- *
- * FIXME: We never restarts a read or write that was terminated
- * by an interrupt. Do we need to?
- *
*/
/* We use separate data structures for node names and connections
@@ -98,7 +66,6 @@ static int conn_open(EpmdVars*,int);
static int conn_close_fd(EpmdVars*,int);
static void node_init(EpmdVars*);
-static Node *node_reg(EpmdVars*,char*,int,int);
static Node *node_reg2(EpmdVars*,char*, int, int, unsigned char, unsigned char, int, int, int, char*);
static int node_unreg(EpmdVars*,char*);
static int node_unreg_sock(EpmdVars*,int);
@@ -424,100 +391,6 @@ static void do_request(g, fd, s, buf, bsize)
switch (*buf)
{
- case EPMD_ALIVE_REQ:
- dbg_printf(g,1,"** got ALIVE_REQ");
-
- /* The packet has the format "axxyyyyyy" where xx is port, given
- in network byte order, and yyyyyy is symname, possibly null
- terminated. */
-
- if (buf[bsize - 1] == '\000') /* Skip null termination */
- bsize--;
-
- if (bsize <= 3)
- {
- dbg_printf(g,0,"packet to small for request ALIVE_REQ (%d)", bsize);
- return;
- }
-
- for (i = 3; i < bsize; i++)
- if (buf[i] == '\000')
- {
- dbg_printf(g,0,"node name contains ascii 0 in ALIVE_REQ");
- return;
- }
-
- {
- Node *node;
- int eport;
- char *name = &buf[3]; /* points to node name */
-
- eport = get_int16(&buf[1]);
-
- if ((node = node_reg(g, name, fd, eport)) == NULL)
- return;
-
- wbuf[0] = EPMD_ALIVE_OK_RESP;
- put_int16(node->creation, wbuf+1);
-
- if (g->delay_write) /* Test of busy server */
- sleep(g->delay_write);
-
- if (reply(g, fd, wbuf, 3) != 3)
- {
- dbg_tty_printf(g,1,"failed to send ALIVE_OK_RESP for \"%s\"",name);
- return;
- }
-
- dbg_tty_printf(g,1,"** sent ALIVE_OK_RESP for \"%s\"",name);
- s->keep = EPMD_TRUE; /* Don't close on inactivity */
- }
- break;
-
- case EPMD_PORT_REQ:
- dbg_printf(g,1,"** got PORT_REQ");
-
- if (buf[bsize - 1] == '\000') /* Skip null termination */
- bsize--;
-
- if (bsize <= 1)
- {
- dbg_printf(g,0,"packet to small for request PORT_REQ (%d)", bsize);
- return;
- }
-
- for (i = 1; i < bsize; i++)
- if (buf[i] == '\000')
- {
- dbg_printf(g,0,"node name contains ascii 0 in PORT_REQ");
- return;
- }
-
- {
- char *name = &buf[1]; /* Points to node name */
- Node *node;
-
- for (node = g->nodes.reg; node; node = node->next)
- {
- if (strcmp(node->symname, name) == 0)
- {
- put_int16(node->port,wbuf);
- if (reply(g, fd, wbuf, 2) != 2)
- {
- dbg_tty_printf(g,1,"failed to send PORT_RESP for %s: %d",
- name,node->port);
- return;
- }
- dbg_tty_printf(g,1,"** sent PORT_RESP for %s: %d",
- name,node->port);
- return;
- }
- }
- dbg_tty_printf(g,1,"Closed on PORT_REQ for %s",name);
- }
- /* FIXME: How about an answer if no port? Is a close enough? */
- break;
-
case EPMD_ALIVE2_REQ:
dbg_printf(g,1,"** got ALIVE2_REQ");
@@ -990,11 +863,6 @@ static int node_unreg_sock(EpmdVars *g,int fd)
* Perhaps use the oldest or something.
*/
-static Node *node_reg(EpmdVars *g,char *name,int fd, int port)
-{
- return node_reg2(g, name, fd, port, 0, 0, 0, 0, 0, NULL);
-}
-
static Node *node_reg2(EpmdVars *g,
char* name,
int fd,