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Add new option (-target_addr) to control how to deal with incoming packets

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Submitted by:	brian
This commit is contained in:
Ruslan Ermilov 2000-05-18 10:31:10 +00:00
parent b3b7116fa3
commit 11c2b3bf00
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=60683
2 changed files with 34 additions and 1 deletions
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22
sbin/natd/natd.8
View file

@ -15,6 +15,7 @@ Network Address Translation Daemon
.Op Fl o Ar outport
.Op Fl p Ar port
.Op Fl a Ar address
.Op Fl t Ar address
.Op Fl n Ar interface
.Op Fl f Ar configfile
@ -32,6 +33,7 @@ Network Address Translation Daemon
.Op Fl outport Ar outport
.Op Fl port Ar port
.Op Fl alias_address Ar address
.Op Fl target_address Ar address
.Op Fl interface Ar interface
.Op Fl config Ar configfile
.Op Fl redirect_port Ar linkspec
@ -291,7 +293,25 @@ and if
.Fl deny_incoming
is not specified, the packet is delivered to the local machine and port
as specified in the packet.
.It Fl t | target_address Ar address
Set the target address.
When an incoming packet not associated with any pre-existing link
arrives at the host machine, it will be sent to the specified
.Ar address .
.Pp
The target address may be set to
.Dq 255.255.255.255 ,
in which case all new incoming packets go to the alias address set by
.Fl alias_address
or
.Fl interface .
.Pp
If this option is not used, or called with
.Dq 0.0.0.0
argument, then all new incoming packets go to the address specified in
the packet.
This allows external machines to talk directly to internal machines if
they can route packets to the machine in question.
.It Fl n | interface Ar interface
Use
.Ar interface

13
sbin/natd/natd.c
View file

@ -860,6 +860,7 @@ enum Option {
OutPort,
Port,
AliasAddress,
TargetAddress,
InterfaceName,
RedirectPort,
RedirectProto,
@ -1007,6 +1008,14 @@ static struct OptionInfo optionTable[] = {
"alias_address",
"a" },
{ TargetAddress,
0,
Address,
"x.x.x.x",
"address to use for incoming sessions",
"target_address",
"t" },
{ InterfaceName,
0,
String,
@ -1206,6 +1215,10 @@ static void ParseOption (const char* option, const char* parms, int cmdLine)
memcpy (&aliasAddr, &addrValue, sizeof (struct in_addr));
break;
case TargetAddress:
PacketAliasSetTarget(addrValue);
break;
case RedirectPort:
SetupPortRedirect (strValue);
break;