*
* @APPLE_LICENSE_HEADER_START@
*
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ * The contents of this file constitute Original Code as defined in and
+ * are subject to the Apple Public Source License Version 1.1 (the
+ * "License"). You may not use this file except in compliance with the
+ * License. Please obtain a copy of the License at
+ * http://www.apple.com/publicsource and read it before using this file.
*
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * This Original Code and all software distributed under the License are
+ * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
When this parameter is GET_ALIAS_PORT, it indicates to get a randomly
selected port number.
*/
-
if (alias_port_param == GET_ALIAS_PORT)
{
/*
port_sys += ALIAS_PORT_BASE;
port_net = htons(port_sys);
}
-
#ifdef DEBUG
fprintf(stderr, "PacketAlias/GetnewPort(): ");
fprintf(stderr, "could not find free port\n");
free(link);
return(NULL);
}
-
/* Link-type dependent initialization */
switch(link_type)
{
}
}
+/* FindAliasPortOut */
+/* external routine for NatPortMap */
+/* return alias port for the src_addr,dst_addr,src_port and proto */
+/* if one doesn't existed, create a mapping with providing pub_port if it's not 0 */
+/* delete mapping if addmapping is not true */
+int
+FindAliasPortOut(struct in_addr src_addr, struct in_addr dst_addr, u_short src_port, u_short pub_port, u_char proto, int lifetime, char addmapping)
+{
+ u_int i;
+ struct alias_link *link;
+ int link_type;
+
+ switch (proto)
+ {
+ case IPPROTO_UDP:
+ link_type = LINK_UDP;
+ break;
+ case IPPROTO_TCP:
+ link_type = LINK_TCP;
+ break;
+ default:
+ return NULL;
+ break;
+ }
+
+#ifdef DEBUG
+ {
+ int icount;
+
+ printf("PORTMAP::srcaddr = 0x%x.%d, dstaddr = 0x%x.%d link_type = %d, lifetime = %d\n",
+ src_addr.s_addr, src_port, dst_addr.s_addr, pub_port, link_type, lifetime);
+
+ for (i=0; i<LINK_TABLE_OUT_SIZE; i++)
+ {
+ link = LIST_FIRST(&linkTableOut[i]);
+ while (link != NULL)
+ {
+ struct alias_link *link_next;
+
+ printf("PORTMAP:: linksrcaddr = 0x%x.%d, linkdstaddr = 0x%x.%d, aliasaddr=0x%x.%d, linktype = %d\n",
+ link->src_addr.s_addr,link->src_port,link->dst_addr.s_addr,link->dst_port, link->alias_addr.s_addr,link->alias_port,
+ link->link_type);
+
+ link_next = LIST_NEXT(link, list_out);
+ icount++;
+ link = link_next;
+ }
+ }
+
+ }
+#endif
+
+ i = StartPointOut(src_addr, dst_addr, src_port, 0, link_type);
+#ifdef DEBUG
+ printf("PORTMAP::StartPointOut returns %d\n", i);
+#endif
+ LIST_FOREACH(link, &linkTableOut[i], list_out)
+ {
+ if (link->src_addr.s_addr == src_addr.s_addr &&
+ link->dst_addr.s_addr == dst_addr.s_addr &&
+ link->src_port == src_port && link->link_type == link_type)
+ break;
+ }
+
+ if ( link == NULL && addmapping)
+ {
+ struct in_addr alias_addr;
+#ifdef DEBUG
+ printf("PORTMAP:: cannot find mapping, adding mapping private port =%d, public port = %d\n",src_port, pub_port);
+#endif
+ /* address/port in not in list, create new mapping */
+
+ alias_addr = FindAliasAddress(src_addr);
+ /* create new mapping */
+ if ( !pub_port )
+ pub_port = GET_ALIAS_PORT;
+ link = AddLink(src_addr, dst_addr, alias_addr,
+ src_port, 0, pub_port,
+ link_type);
+ if ( link != NULL )
+ /* link was create, set new lifetime */
+ SetExpire(link, lifetime);
+ }
+ if ( link )
+ {
+ if ( addmapping )
+ return( GetAliasPort(link));
+ else
+ {
+ SetExpire(link, 0); /* delete mapping */
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
/* External routines for getting or changing link data
(external to alias_db.c, but internal to alias*.c)
projects / apple / network_cmds.git / blobdiff