From a09aa3ead995ddb5af2cd20106943aa4f0fdaf7f Mon Sep 17 00:00:00 2001
From: "mcs%pearlcrescent.com"
 <mcs%pearlcrescent.com@18797224-902f-48f8-a5cc-f745e15eee43>
Date: Fri, 15 Oct 2004 13:10:04 +0000
Subject: [PATCH] Fix bug # 263557 - Sending a request fails on Windows when
 the                    ber size is larger than 64MB.   Break up large
 messages into <= 8MB sized chunks inside prldap_write().

git-svn-id: svn://10.0.0.236/trunk@163820 18797224-902f-48f8-a5cc-f745e15eee43
---
 .../ldap/libraries/libprldap/ldappr-int.h     |  9 ++++++
 .../ldap/libraries/libprldap/ldappr-io.c      | 32 ++++++++++++++++---
 2 files changed, 36 insertions(+), 5 deletions(-)

diff --git a/mozilla/directory/c-sdk/ldap/libraries/libprldap/ldappr-int.h b/mozilla/directory/c-sdk/ldap/libraries/libprldap/ldappr-int.h
index d3c40e0d024..cc7554357bb 100644
--- a/mozilla/directory/c-sdk/ldap/libraries/libprldap/ldappr-int.h
+++ b/mozilla/directory/c-sdk/ldap/libraries/libprldap/ldappr-int.h
@@ -61,6 +61,15 @@
  */
 #define PRLDAP_DEFAULT_ADDRESS_FAMILY	PR_AF_INET6
 
+/*
+ * Max length for sending message with one PR_Send.
+ * If a single message is larger than this size, the message is divided
+ * into multiple pieces up to this length and sent out.  This is necessary
+ * on Microsoft Windows at least where attempts to send really large
+ * messages in one PR_Send() call result in an error.
+ */
+#define PRLDAP_MAX_SEND_SIZE (8*1024*1024) /* 8MB */
+
 
 /*
  * Data structures:
diff --git a/mozilla/directory/c-sdk/ldap/libraries/libprldap/ldappr-io.c b/mozilla/directory/c-sdk/ldap/libraries/libprldap/ldappr-io.c
index 65bfd4ec873..931e0bd26e3 100644
--- a/mozilla/directory/c-sdk/ldap/libraries/libprldap/ldappr-io.c
+++ b/mozilla/directory/c-sdk/ldap/libraries/libprldap/ldappr-io.c
@@ -198,15 +198,37 @@ prldap_write( int s, const void *buf, int len,
 	struct lextiof_socket_private *socketarg )
 {
     PRIntervalTime	prit;
+    char		*ptr = (char *)buf;
+    int			rest = len;
 
     prit = prldap_timeout2it( LDAP_X_IO_TIMEOUT_NO_TIMEOUT,
 			socketarg->prsock_io_max_timeout );
 
-    /*
-     * Note the 4th parameter (flags) to PR_Send() has been obsoleted and
-     * must always be 0
-     */
-    return( PR_Send( PRLDAP_GET_PRFD(socketarg), buf, len, 0, prit ));
+    while ( rest > 0 ) {
+	int rval;
+	if ( rest > PRLDAP_MAX_SEND_SIZE ) {
+	    len = PRLDAP_MAX_SEND_SIZE;
+	} else {
+	    len = rest;
+	}
+	/*
+	 * Note the 4th parameter (flags) to PR_Send() has been obsoleted and
+	 * must always be 0
+	 */
+	rval = PR_Send( PRLDAP_GET_PRFD(socketarg), ptr, len, 0, prit );
+	if ( 0 > rval ) {
+	    return rval;
+	}
+
+	if ( 0 == rval ) {
+	    break;
+	}
+
+	ptr += rval;
+	rest -= rval;
+    }
+
+    return (int)( ptr - (char *)buf );
 }