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-rw-r--r--share/man/man4/natmip.4140
-rw-r--r--sys/netinet/if_atm.c115
2 files changed, 166 insertions, 89 deletions
diff --git a/share/man/man4/natmip.4 b/share/man/man4/natmip.4
index f75f964..2ef1b2c 100644
--- a/share/man/man4/natmip.4
+++ b/share/man/man4/natmip.4
@@ -1,6 +1,6 @@
.\" $FreeBSD$
.\"
-.Dd June 13, 2003
+.Dd August 11, 2003
.Dt NATMIP 4
.Os
.Sh NAME
@@ -19,15 +19,103 @@ like:
.Pp
.Dl # ifconfig en0 128.252.200.1 netmask 0xffffff00 up
.Pp
-A PVC is added with the
-.Dq route
-utility:
+IP routing is done with special interface routes (routes with directly
+reachable destinations) with a link layer gateway address.
+The link layer address specifies the ATM interface through which the
+destination can be reached, the virtual channel that connects to the
+destination and the ATM characteristics of this channel.
+The address part of the link layer address (see
+.Xr link_addr 3 )
+consists of a fixed part (the first 5 bytes) and a part that
+depends on the kind of the PVC (UBR, CBR, VBR, ABR). Multi-byte values
+are big-endian encoded: the bytes with the lower numbers contain the
+higher order bits.
+.Bl -tag -width "bytes 12...12" -offset indent
+.It byte 0
+Is a flag byte. Currently only flag 0x20 is used.
+When set, all IP frames are LLC/SNAP encapsulated before putting them into
+an AAL5 frame.
+Setting this flag is recommended and allows interoperability with other
+CLIP implementations.
+Note that BPF works only with LLC/SNAP encapsulation.
+.It byte 1
+This is the VPI of the channel.
+.It bytes 2...3
+VCI of the channel. Must not be zero.
+.It byte 4
+Traffic type. One of 0 (UBR), 1 (CBR), 2 (ABR), 3 (VBR).
+.El
+.Pp
+The variable part for UBR connections may be either empty or three bytes:
+.Bl -tag -width "bytes 12...12" -offset indent
+.It bytes 5...7
+Specifies the peak cell rate for UBR.
+.El
+.Pp
+The variable part for CBR connections must be three bytes:
+.Bl -tag -width "bytes 12...12" -offset indent
+.It bytes 5...7
+Specifies the peak cell rate for CBR.
+.El
.Pp
-.Dl # route add -iface <remote IP address> -link en0:z.0.x.y
+The variable part for VBR connections must be 9 bytes long and specifies three
+values:
+.Bl -tag -width "bytes 12...12" -offset indent
+.It bytes 5...7
+Specifies the peak cell rate for VBR.
+.It bytes 8...10
+This is the sustainable cell rate.
+.It bytes 11...13
+The maximum burst size.
+.El
.Pp
-where x and y are the hexadecimal byte encoding of the VCI to use,
-and z is the byte encoding of the following flags:
+The variable part for ABR connections must be 19 bytes long and specifies the
+following values:
+.Bl -tag -width "bytes 12...12" -offset indent
+.It bytes 5...7
+Specifies the peak cell rate for ABR.
+.It bytes 8...10
+The minimum cell rate.
+.It bytes 11...13
+The initial cell rate.
+.It bytes 14...16
+The transient buffer exposure.
+.It byte 17
+The NRM value.
+.It byte 18
+The TRM value.
+.It bytes 19...20
+The ADTF value.
+.It byte 21
+The rate increase factor (RIF).
+.It byte 22
+The rate decrease factor (RDF).
+.It byte 23
+The cutoff decrease factor (CDF).
+.El
.Pp
+To add a PVC the
+.Dq route
+utility can be used:
+.Pp
+.Ic # route add -iface
+.Ar <remote IP address>
+.Ic -link
+.Ar <iface> Ns Ic \&: Ns Ar <lladdr>
+.Pp
+The
+.Ar <iface>
+is the ATM interface through which
+.Ar <remote IP address>
+can be reached and
+.Ar <lladdr>
+is the link layer address as a string of dot-separated, hexadecimal bytes.
+.Pp
+NATM also supports the old, original format. This consists of 4 byte
+link layer addresses (and the channels are implicit UBR):
+.Bl -tag -width "bytes 12...12" -offset indent
+.It byte 0
+Flags:
.Bl -tag -width "0x02" -offset indent -compact
.It 0x01
use AAL5.
@@ -38,40 +126,48 @@ if using AAL5, use an LLC/SNAP header.
Thus, parameter 3 means AAL5 and LLC/SNAP encapsulation (this is the required
setting for interworking with other CLIP clients).
Note that BPF works only with LLC/SNAP encapsulation.
+.It byte 1
+VPI for the channel
+.It bytes 2...3
+VCI for the channel
+.El
.Sh EXAMPLES
Suppose you have 3 hosts 128.252.200.1, 128.252.200.2 and
128.252.200.3 connected by ATM through PVCs:
.Pp
.Bl -item -offset indent -compact
.It
-between 128.252.200.1 and 128.252.200.2: 0xc9
+between 128.252.200.1 and 128.252.200.2: 0xc9 UBR
.It
-between 128.252.200.1 and 128.252.200.3: 0xca
+between 128.252.200.1 and 128.252.200.3: 0xca VBR
.It
-between 128.252.200.2 and 128.252.200.3: 0xcb
+between 128.252.200.2 and 128.252.200.3: 0xcb CBR
.El
.Pp
+The parameters for the VBR channel are: PCR 50000, SCR 10000, MBS 10.
+The peak cell rate for the CBR channel is 100000.
+.Pp
To enable the links use the following commands:
.Pp
on host 128.252.200.1:
.Bd -literal -offset indent -compact
# ifconfig en0 128.252.200.1 netmask 0xffffff00 up
-# route add -iface 128.252.200.2 -link en0:3.0.0.c9
-# route add -iface 128.252.200.3 -link en0:3.0.0.ca
+# route add -iface 128.252.200.2 -link en0:3.0.0.c9.0
+# route add -iface 128.252.200.3 -link en0:3.0.0.ca.3.0.c3.50.0.27.10.0.0.a
.Ed
.Pp
on host 128.252.200.2:
.Bd -literal -offset indent -compact
# ifconfig en0 128.252.200.2 netmask 0xffffff00 up
-# route add -iface 128.252.200.1 -link en0:3.0.0.c9
-# route add -iface 128.252.200.3 -link en0:3.0.0.cb
+# route add -iface 128.252.200.1 -link en0:3.0.0.c9.0
+# route add -iface 128.252.200.3 -link en0:3.0.0.cb.1.1.86.a0
.Ed
.Pp
on host 128.252.200.3:
.Bd -literal -offset indent -compact
# ifconfig en0 128.252.200.3 netmask 0xffffff00 up
-# route add -iface 128.252.200.1 -link en0:3.0.0.ca
-# route add -iface 128.252.200.2 -link en0:3.0.0.cb
+# route add -iface 128.252.200.1 -link en0:3.0.0.ca.3.0.c3.50.0.27.10.0.0.a
+# route add -iface 128.252.200.2 -link en0:3.0.0.cb.1.1.86.a0
.Ed
.Pp
This can also be done in
@@ -82,8 +178,8 @@ on host 128.252.200.1:
network_interfaces="lo0 en0"
ifconfig_en0="inet 128.252.200.1 netmask 255.255.255.0"
static_routes="host2 host3"
-route_host2="-iface 128.252.200.2 -link en0:3.0.0.c9"
-route_host3="-iface 128.252.200.3 -link en0:3.0.0.ca"
+route_host2="-iface 128.252.200.2 -link en0:3.0.0.c9.0"
+route_host3="-iface 128.252.200.3 -link en0:3.0.0.ca.3.0.c3.50.0.27.10.0.0.a"
.Ed
.Pp
on host 128.252.200.2:
@@ -91,8 +187,8 @@ on host 128.252.200.2:
network_interfaces="lo0 en0"
ifconfig_en0="inet 128.252.200.2 netmask 255.255.255.0"
static_routes="host1 host3"
-route_host1="-iface 128.252.200.1 -link en0:3.0.0.c9"
-route_host3="-iface 128.252.200.3 -link en0:3.0.0.cb"
+route_host1="-iface 128.252.200.1 -link en0:3.0.0.c9.0"
+route_host3="-iface 128.252.200.3 -link en0:3.0.0.cb.1.1.86.a0"
.Ed
.Pp
on host 128.252.200.3:
@@ -100,8 +196,8 @@ on host 128.252.200.3:
network_interfaces="lo0 en0"
ifconfig_en0="inet 128.252.200.3 netmask 255.255.255.0"
static_routes="host1 host2"
-route_host1="-iface 128.252.200.1 -link en0:3.0.0.ca"
-route_host2="-iface 128.252.200.2 -link en0:3.0.0.cb"
+route_host1="-iface 128.252.200.1 -link en0:3.0.0.ca.3.0.c3.50.0.27.10.0.0.a"
+route_host2="-iface 128.252.200.2 -link en0:3.0.0.cb.1.1.86.a0"
.Ed
.Sh SEE ALSO
.Xr en 4 ,
diff --git a/sys/netinet/if_atm.c b/sys/netinet/if_atm.c
index f328c07..82c95bf 100644
--- a/sys/netinet/if_atm.c
+++ b/sys/netinet/if_atm.c
@@ -65,6 +65,24 @@ __FBSDID("$FreeBSD$");
#define SDL(s) ((struct sockaddr_dl *)s)
+#define GET3BYTE(V, A, L) do { \
+ (V) = ((A)[0] << 16) | ((A)[1] << 8) | (A)[2]; \
+ (A) += 3; \
+ (L) -= 3; \
+ } while (0)
+
+#define GET2BYTE(V, A, L) do { \
+ (V) = ((A)[0] << 8) | (A)[1]; \
+ (A) += 2; \
+ (L) -= 2; \
+ } while (0)
+
+#define GET1BYTE(V, A, L) do { \
+ (V) = *(A)++; \
+ (L)--; \
+ } while (0)
+
+
/*
* atm_rtrequest: handle ATM rt request (in support of generic code)
* inputs: "req" = request code
@@ -136,96 +154,59 @@ atm_rtrequest(int req, struct rtentry *rt, struct rt_addrinfo *info)
if (alen == 4) {
/* old type address */
- op.param.flags = *addr++;
- op.param.vpi = *addr++;
- op.param.vci = *addr++ << 8;
- op.param.vci |= *addr++;
+ GET1BYTE(op.param.flags, addr, alen);
+ GET1BYTE(op.param.vpi, addr, alen);
+ GET2BYTE(op.param.vci, addr, alen);
op.param.traffic = ATMIO_TRAFFIC_UBR;
op.param.aal = (op.param.flags & ATM_PH_AAL5) ?
ATMIO_AAL_5 : ATMIO_AAL_0;
} else {
/* new address */
op.param.aal = ATMIO_AAL_5;
- /* 1. byte LLC/SNAP flag */
- op.param.flags = *addr++ & ATM_PH_LLCSNAP;
- alen--;
- /* 2.-4. byte VPI/VCI */
- op.param.vpi = *addr++;
- op.param.vci = *addr++ << 8;
- op.param.vci |= *addr++;
- alen -= 3;
- /* 5. byte: traffic */
- op.param.traffic = *addr++;
- alen--;
+
+ GET1BYTE(op.param.flags, addr, alen);
+ op.param.flags &= ATM_PH_LLCSNAP;
+
+ GET1BYTE(op.param.vpi, addr, alen);
+ GET2BYTE(op.param.vci, addr, alen);
+
+ GET1BYTE(op.param.traffic, addr, alen);
+
switch (op.param.traffic) {
case ATMIO_TRAFFIC_UBR:
- if (alen >= 3) {
- op.param.tparam.pcr = *addr++ << 16;
- op.param.tparam.pcr = *addr++ << 8;
- op.param.tparam.pcr = *addr++ << 0;
- alen -= 3;
- }
+ if (alen >= 3)
+ GET3BYTE(op.param.tparam.pcr,
+ addr, alen);
break;
case ATMIO_TRAFFIC_CBR:
if (alen < 3)
goto bad_param;
- op.param.tparam.pcr = *addr++ << 16;
- op.param.tparam.pcr = *addr++ << 8;
- op.param.tparam.pcr = *addr++ << 0;
- alen -= 3;
+ GET3BYTE(op.param.tparam.pcr, addr, alen);
break;
case ATMIO_TRAFFIC_VBR:
if (alen < 3 * 3)
goto bad_param;
- op.param.tparam.pcr = *addr++ << 16;
- op.param.tparam.pcr = *addr++ << 8;
- op.param.tparam.pcr = *addr++ << 0;
- alen -= 3;
- op.param.tparam.scr = *addr++ << 16;
- op.param.tparam.scr = *addr++ << 8;
- op.param.tparam.scr = *addr++ << 0;
- alen -= 3;
- op.param.tparam.mbs = *addr++ << 16;
- op.param.tparam.mbs = *addr++ << 8;
- op.param.tparam.mbs = *addr++ << 0;
- alen -= 3;
+ GET3BYTE(op.param.tparam.pcr, addr, alen);
+ GET3BYTE(op.param.tparam.scr, addr, alen);
+ GET3BYTE(op.param.tparam.mbs, addr, alen);
break;
case ATMIO_TRAFFIC_ABR:
- if (alen < 4 * 3 + 1 * 2 + 5 + 1)
+ if (alen < 4 * 3 + 2 + 1 * 2 + 3)
goto bad_param;
- op.param.tparam.pcr = *addr++ << 16;
- op.param.tparam.pcr = *addr++ << 8;
- op.param.tparam.pcr = *addr++ << 0;
- alen -= 3;
- op.param.tparam.mcr = *addr++ << 16;
- op.param.tparam.mcr = *addr++ << 8;
- op.param.tparam.mcr = *addr++ << 0;
- alen -= 3;
- op.param.tparam.icr = *addr++ << 16;
- op.param.tparam.icr = *addr++ << 8;
- op.param.tparam.icr = *addr++ << 0;
- alen -= 3;
- op.param.tparam.tbe = *addr++ << 16;
- op.param.tparam.tbe = *addr++ << 8;
- op.param.tparam.tbe = *addr++ << 0;
- alen -= 3;
- op.param.tparam.nrm = *addr++;
- alen--;
- op.param.tparam.trm = *addr++;
- alen--;
- op.param.tparam.adtf = *addr++ << 8;
- op.param.tparam.adtf = *addr++ << 0;
- alen -= 2;
- op.param.tparam.rif = *addr++;
- alen--;
- op.param.tparam.rdf = *addr++;
- alen--;
- op.param.tparam.cdf = *addr++;
- alen--;
+ GET3BYTE(op.param.tparam.pcr, addr, alen);
+ GET3BYTE(op.param.tparam.mcr, addr, alen);
+ GET3BYTE(op.param.tparam.icr, addr, alen);
+ GET3BYTE(op.param.tparam.tbe, addr, alen);
+ GET1BYTE(op.param.tparam.nrm, addr, alen);
+ GET1BYTE(op.param.tparam.trm, addr, alen);
+ GET2BYTE(op.param.tparam.adtf, addr, alen);
+ GET1BYTE(op.param.tparam.rif, addr, alen);
+ GET1BYTE(op.param.tparam.rdf, addr, alen);
+ GET1BYTE(op.param.tparam.cdf, addr, alen);
break;
default:
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