diff options
Diffstat (limited to 'erts/epmd')
| -rw-r--r-- | erts/epmd/src/epmd.h | 21 | ||||
| -rw-r--r-- | erts/epmd/src/epmd_srv.c | 132 |
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, |