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Code Issues Releases Activity

New option: -redirect_proto.

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This commit is contained in:
Ruslan Ermilov 2000-05-03 15:06:45 +00:00
parent 2b578691e7
commit 4330006d9e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=59921
2 changed files with 91 additions and 1 deletions
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22
sbin/natd/natd.8
View File

@ -35,6 +35,7 @@ Network Address Translation Daemon
.Op Fl interface Ar interface
.Op Fl config Ar configfile
.Op Fl redirect_port Ar linkspec
.Op Fl redirect_proto Ar linkspec
.Op Fl redirect_address Ar linkspec
.Op Fl reverse
.Op Fl proxy_only
@ -139,7 +140,26 @@ be sent to the telnet port on the inside1 machine.
will redirect incoming connections on ports 3300-3399 to host
inside2, ports 2300-2399.
The mapping is 1:1 meaning port 3300 maps to 2300, 3301 maps to 2301, etc.
.It Fl redirect_proto Ar proto localIP Xo
.Op Ar publicIP Op Ar remoteIP
.Xc
Redirect incoming IP packets of protocol
.Ar proto
.Pq see Xr protocols 5
destined for
.Ar publicIP
address to a
.Ar localIP
address and vice versa.
.Pp
If
.Ar publicIP
is not specified, then the default aliasing address is used.
If
.Ar remoteIP
is specified, then only packets coming from/to
.Ar remoteIP
will match the rule.
.It Fl redirect_address Ar localIP publicIP
Redirect traffic for public IP address to a machine on the local
network.

70
sbin/natd/natd.c
View File

@ -89,6 +89,7 @@ static void RefreshAddr (int);
static void ParseOption (const char* option, const char* parms, int cmdLine);
static void ReadConfigFile (const char* fileName);
static void SetupPortRedirect (const char* parms);
static void SetupProtoRedirect(const char* parms);
static void SetupAddressRedirect (const char* parms);
static void SetupPptpAlias (const char* parms);
static void StrToAddr (const char* str, struct in_addr* addr);
@ -861,6 +862,7 @@ enum Option {
AliasAddress,
InterfaceName,
RedirectPort,
RedirectProto,
RedirectAddress,
ConfigFile,
DynamicMode,
@ -1031,6 +1033,14 @@ static struct OptionInfo optionTable[] = {
"redirect_port",
NULL },
{ RedirectProto,
0,
String,
"proto local_addr [public_addr] [remote_addr]",
"redirect packets of a given proto",
"redirect_proto",
NULL },
{ RedirectAddress,
0,
String,
@ -1200,6 +1210,10 @@ static void ParseOption (const char* option, const char* parms, int cmdLine)
SetupPortRedirect (strValue);
break;
case RedirectProto:
SetupProtoRedirect(strValue);
break;
case RedirectAddress:
SetupAddressRedirect (strValue);
break;
@ -1488,6 +1502,62 @@ void SetupPortRedirect (const char* parms)
}
}
void
SetupProtoRedirect(const char* parms)
{
char buf[128];
char* ptr;
struct in_addr localAddr;
struct in_addr publicAddr;
struct in_addr remoteAddr;
int proto;
char* protoName;
struct protoent *protoent;
strcpy (buf, parms);
/*
* Extract protocol.
*/
protoName = strtok(buf, " \t");
if (!protoName)
errx(1, "redirect_proto: missing protocol");
protoent = getprotobyname(protoName);
if (protoent == NULL)
errx(1, "redirect_proto: unknown protocol %s", protoName);
else
proto = protoent->p_proto;
/*
* Extract local address.
*/
ptr = strtok(NULL, " \t");
if (!ptr)
errx(1, "redirect_proto: missing local address");
else
StrToAddr(ptr, &localAddr);
/*
* Extract optional public address.
*/
ptr = strtok(NULL, " \t");
if (ptr)
StrToAddr(ptr, &publicAddr);
else
publicAddr.s_addr = INADDR_ANY;
/*
* Extract optional remote address.
*/
ptr = strtok(NULL, " \t");
if (ptr)
StrToAddr(ptr, &remoteAddr);
else
remoteAddr.s_addr = INADDR_ANY;
/*
* Create aliasing link.
*/
(void)PacketAliasRedirectProto(localAddr, remoteAddr, publicAddr,
proto);
}
void SetupAddressRedirect (const char* parms)
{
char buf[128];