diff options
Diffstat (limited to 'source3/lib')
| -rw-r--r-- | source3/lib/messages.c | 124 |
1 files changed, 12 insertions, 112 deletions
diff --git a/source3/lib/messages.c b/source3/lib/messages.c index 479a6952a6..7ccc87a3cb 100644 --- a/source3/lib/messages.c +++ b/source3/lib/messages.c @@ -4,6 +4,7 @@ Copyright (C) Andrew Tridgell 2000 Copyright (C) 2001 by Martin Pool Copyright (C) 2002 by Jeremy Allison + Copyright (C) 2007 by Volker Lendecke This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -106,8 +107,7 @@ static void sig_usr1(void) } static NTSTATUS message_send_pid(struct server_id pid, int msg_type, - const void *buf, size_t len, - BOOL duplicates_allowed); + const void *buf, size_t len); /**************************************************************************** A useful function for testing the message system. @@ -120,7 +120,7 @@ static void ping_message(int msg_type, struct server_id src, DEBUG(1,("INFO: Received PING message from PID %s [%s]\n", procid_str_static(&src), msg)); - message_send_pid(src, MSG_PONG, buf, len, True); + message_send_pid(src, MSG_PONG, buf, len); } /**************************************************************************** @@ -240,17 +240,13 @@ static NTSTATUS message_notify(struct server_id procid) Send a message to a particular pid. ****************************************************************************/ -static NTSTATUS message_send_pid_internal(struct server_id pid, int msg_type, - const void *buf, size_t len, - BOOL duplicates_allowed, - unsigned int timeout) +static NTSTATUS message_send_pid(struct server_id pid, int msg_type, + const void *buf, size_t len) { TDB_DATA kbuf; TDB_DATA dbuf; - TDB_DATA old_dbuf; struct message_rec rec; - uint8 *ptr; - struct message_rec prec; + int ret; /* NULL pointer means implicit length zero. */ if (!buf) { @@ -283,113 +279,19 @@ static NTSTATUS message_send_pid_internal(struct server_id pid, int msg_type, dbuf.dsize = len + sizeof(rec); - if (duplicates_allowed) { - - /* If duplicates are allowed we can just append the message - * and return. */ - - /* lock the record for the destination */ - if (timeout) { - if (tdb_chainlock_with_timeout(tdb, kbuf, - timeout) == -1) { - DEBUG(0,("message_send_pid_internal: failed " - "to get chainlock with timeout " - "%ul.\n", timeout)); - return NT_STATUS_IO_TIMEOUT; - } - } else { - if (tdb_chainlock(tdb, kbuf) == -1) { - DEBUG(0,("message_send_pid_internal: failed " - "to get chainlock.\n")); - return NT_STATUS_LOCK_NOT_GRANTED; - } - } - tdb_append(tdb, kbuf, dbuf); - tdb_chainunlock(tdb, kbuf); - - SAFE_FREE(dbuf.dptr); - errno = 0; /* paranoia */ - return message_notify(pid); - } - - /* lock the record for the destination */ - if (timeout) { - if (tdb_chainlock_with_timeout(tdb, kbuf, timeout) == -1) { - DEBUG(0,("message_send_pid_internal: failed to get " - "chainlock with timeout %ul.\n", timeout)); - return NT_STATUS_IO_TIMEOUT; - } - } else { - if (tdb_chainlock(tdb, kbuf) == -1) { - DEBUG(0,("message_send_pid_internal: failed to get " - "chainlock.\n")); - return NT_STATUS_LOCK_NOT_GRANTED; - } - } - - old_dbuf = tdb_fetch(tdb, kbuf); - - if (!old_dbuf.dptr) { - /* its a new record */ - - tdb_store(tdb, kbuf, dbuf, TDB_REPLACE); - tdb_chainunlock(tdb, kbuf); - - SAFE_FREE(dbuf.dptr); - errno = 0; /* paranoia */ - return message_notify(pid); - } - - /* Not a new record. Check for duplicates. */ + ret = tdb_append(tdb, kbuf, dbuf); - for(ptr = old_dbuf.dptr; ptr < old_dbuf.dptr + old_dbuf.dsize; ) { - /* - * First check if the message header matches, then, if it's a - * non-zero sized message, check if the data matches. If so - * it's a duplicate and we can discard it. JRA. - */ + SAFE_FREE(dbuf.dptr); - if (!memcmp(ptr, &rec, sizeof(rec))) { - if (!len - || (len - && !memcmp( ptr + sizeof(rec), buf, len))) { - tdb_chainunlock(tdb, kbuf); - DEBUG(10,("message_send_pid_internal: " - "discarding duplicate message.\n")); - SAFE_FREE(dbuf.dptr); - SAFE_FREE(old_dbuf.dptr); - return NT_STATUS_OK; - } - } - memcpy(&prec, ptr, sizeof(prec)); - ptr += sizeof(rec) + prec.len; + if (ret == -1) { + return NT_STATUS_INTERNAL_ERROR; } - /* we're adding to an existing entry */ - - tdb_append(tdb, kbuf, dbuf); - tdb_chainunlock(tdb, kbuf); - - SAFE_FREE(old_dbuf.dptr); - SAFE_FREE(dbuf.dptr); - errno = 0; /* paranoia */ return message_notify(pid); } /**************************************************************************** - Send a message to a particular pid - no timeout. -****************************************************************************/ - -static NTSTATUS message_send_pid(struct server_id pid, int msg_type, - const void *buf, size_t len, - BOOL duplicates_allowed) -{ - return message_send_pid_internal(pid, msg_type, buf, len, - duplicates_allowed, 0); -} - -/**************************************************************************** Count the messages pending for a particular pid. Expensive.... ****************************************************************************/ @@ -646,8 +548,7 @@ static int traverse_fn(TDB_CONTEXT *the_tdb, TDB_DATA kbuf, TDB_DATA dbuf, * the msg has already been deleted from the messages.tdb.*/ status = message_send_pid(crec.pid, msg_all->msg_type, - msg_all->buf, msg_all->len, - msg_all->duplicates); + msg_all->buf, msg_all->len); if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_HANDLE)) { @@ -860,8 +761,7 @@ NTSTATUS messaging_send(struct messaging_context *msg_ctx, struct server_id server, uint32_t msg_type, const DATA_BLOB *data) { - return message_send_pid_internal(server, msg_type, data->data, - data->length, True, 0); + return message_send_pid(server, msg_type, data->data, data->length); } NTSTATUS messaging_send_buf(struct messaging_context *msg_ctx, |