summaryrefslogtreecommitdiffhomepage
path: root/pkg/tcpip/stack
diff options
context:
space:
mode:
Diffstat (limited to 'pkg/tcpip/stack')
-rw-r--r--pkg/tcpip/stack/iptables.go30
-rw-r--r--pkg/tcpip/stack/iptables_targets.go18
-rw-r--r--pkg/tcpip/stack/iptables_types.go2
3 files changed, 26 insertions, 24 deletions
diff --git a/pkg/tcpip/stack/iptables.go b/pkg/tcpip/stack/iptables.go
index 3c33589ad..74c9075b4 100644
--- a/pkg/tcpip/stack/iptables.go
+++ b/pkg/tcpip/stack/iptables.go
@@ -270,8 +270,8 @@ const (
// must be dropped if false is returned.
//
// Precondition: The packet's network and transport header must be set.
-func (it *IPTables) CheckPrerouting(pkt *PacketBuffer, preroutingAddr tcpip.Address, inNicName string) bool {
- return it.check(Prerouting, pkt, nil /* route */, preroutingAddr, inNicName, "" /* outNicName */)
+func (it *IPTables) CheckPrerouting(pkt *PacketBuffer, addressEP AddressableEndpoint, inNicName string) bool {
+ return it.check(Prerouting, pkt, nil /* route */, addressEP, inNicName, "" /* outNicName */)
}
// CheckInput performs the input hook on the packet.
@@ -281,7 +281,7 @@ func (it *IPTables) CheckPrerouting(pkt *PacketBuffer, preroutingAddr tcpip.Addr
//
// Precondition: The packet's network and transport header must be set.
func (it *IPTables) CheckInput(pkt *PacketBuffer, inNicName string) bool {
- return it.check(Input, pkt, nil /* route */, "" /* preroutingAddr */, inNicName, "" /* outNicName */)
+ return it.check(Input, pkt, nil /* route */, nil /* addressEP */, inNicName, "" /* outNicName */)
}
// CheckForward performs the forward hook on the packet.
@@ -291,7 +291,7 @@ func (it *IPTables) CheckInput(pkt *PacketBuffer, inNicName string) bool {
//
// Precondition: The packet's network and transport header must be set.
func (it *IPTables) CheckForward(pkt *PacketBuffer, inNicName, outNicName string) bool {
- return it.check(Forward, pkt, nil /* route */, "" /* preroutingAddr */, inNicName, outNicName)
+ return it.check(Forward, pkt, nil /* route */, nil /* addressEP */, inNicName, outNicName)
}
// CheckOutput performs the output hook on the packet.
@@ -301,7 +301,7 @@ func (it *IPTables) CheckForward(pkt *PacketBuffer, inNicName, outNicName string
//
// Precondition: The packet's network and transport header must be set.
func (it *IPTables) CheckOutput(pkt *PacketBuffer, r *Route, outNicName string) bool {
- return it.check(Output, pkt, r, "" /* preroutingAddr */, "" /* inNicName */, outNicName)
+ return it.check(Output, pkt, r, nil /* addressEP */, "" /* inNicName */, outNicName)
}
// CheckPostrouting performs the postrouting hook on the packet.
@@ -311,7 +311,7 @@ func (it *IPTables) CheckOutput(pkt *PacketBuffer, r *Route, outNicName string)
//
// Precondition: The packet's network and transport header must be set.
func (it *IPTables) CheckPostrouting(pkt *PacketBuffer, r *Route, outNicName string) bool {
- return it.check(Postrouting, pkt, r, "" /* preroutingAddr */, "" /* inNicName */, outNicName)
+ return it.check(Postrouting, pkt, r, nil /* addressEP */, "" /* inNicName */, outNicName)
}
// check runs pkt through the rules for hook. It returns true when the packet
@@ -319,7 +319,7 @@ func (it *IPTables) CheckPostrouting(pkt *PacketBuffer, r *Route, outNicName str
// dropped.
//
// Precondition: The packet's network and transport header must be set.
-func (it *IPTables) check(hook Hook, pkt *PacketBuffer, r *Route, preroutingAddr tcpip.Address, inNicName, outNicName string) bool {
+func (it *IPTables) check(hook Hook, pkt *PacketBuffer, r *Route, addressEP AddressableEndpoint, inNicName, outNicName string) bool {
if pkt.NetworkProtocolNumber != header.IPv4ProtocolNumber && pkt.NetworkProtocolNumber != header.IPv6ProtocolNumber {
return true
}
@@ -350,7 +350,7 @@ func (it *IPTables) check(hook Hook, pkt *PacketBuffer, r *Route, preroutingAddr
table = it.v4Tables[tableID]
}
ruleIdx := table.BuiltinChains[hook]
- switch verdict := it.checkChain(hook, pkt, table, ruleIdx, r, preroutingAddr, inNicName, outNicName); verdict {
+ switch verdict := it.checkChain(hook, pkt, table, ruleIdx, r, addressEP, inNicName, outNicName); verdict {
// If the table returns Accept, move on to the next table.
case chainAccept:
continue
@@ -361,7 +361,7 @@ func (it *IPTables) check(hook Hook, pkt *PacketBuffer, r *Route, preroutingAddr
// Any Return from a built-in chain means we have to
// call the underflow.
underflow := table.Rules[table.Underflows[hook]]
- switch v, _ := underflow.Target.Action(pkt, &it.connections, hook, r, preroutingAddr); v {
+ switch v, _ := underflow.Target.Action(pkt, &it.connections, hook, r, addressEP); v {
case RuleAccept:
continue
case RuleDrop:
@@ -453,7 +453,7 @@ func (it *IPTables) CheckPostroutingPackets(pkts PacketBufferList, r *Route, out
func (it *IPTables) checkPackets(hook Hook, pkts PacketBufferList, r *Route, outNicName string) (drop map[*PacketBuffer]struct{}, natPkts map[*PacketBuffer]struct{}) {
for pkt := pkts.Front(); pkt != nil; pkt = pkt.Next() {
if !pkt.NatDone {
- if ok := it.check(hook, pkt, r, "" /* preroutingAddr */, "" /* inNicName */, outNicName); !ok {
+ if ok := it.check(hook, pkt, r, nil /* addressEP */, "" /* inNicName */, outNicName); !ok {
if drop == nil {
drop = make(map[*PacketBuffer]struct{})
}
@@ -473,11 +473,11 @@ func (it *IPTables) checkPackets(hook Hook, pkts PacketBufferList, r *Route, out
// Preconditions:
// * pkt is a IPv4 packet of at least length header.IPv4MinimumSize.
// * pkt.NetworkHeader is not nil.
-func (it *IPTables) checkChain(hook Hook, pkt *PacketBuffer, table Table, ruleIdx int, r *Route, preroutingAddr tcpip.Address, inNicName, outNicName string) chainVerdict {
+func (it *IPTables) checkChain(hook Hook, pkt *PacketBuffer, table Table, ruleIdx int, r *Route, addressEP AddressableEndpoint, inNicName, outNicName string) chainVerdict {
// Start from ruleIdx and walk the list of rules until a rule gives us
// a verdict.
for ruleIdx < len(table.Rules) {
- switch verdict, jumpTo := it.checkRule(hook, pkt, table, ruleIdx, r, preroutingAddr, inNicName, outNicName); verdict {
+ switch verdict, jumpTo := it.checkRule(hook, pkt, table, ruleIdx, r, addressEP, inNicName, outNicName); verdict {
case RuleAccept:
return chainAccept
@@ -494,7 +494,7 @@ func (it *IPTables) checkChain(hook Hook, pkt *PacketBuffer, table Table, ruleId
ruleIdx++
continue
}
- switch verdict := it.checkChain(hook, pkt, table, jumpTo, r, preroutingAddr, inNicName, outNicName); verdict {
+ switch verdict := it.checkChain(hook, pkt, table, jumpTo, r, addressEP, inNicName, outNicName); verdict {
case chainAccept:
return chainAccept
case chainDrop:
@@ -520,7 +520,7 @@ func (it *IPTables) checkChain(hook Hook, pkt *PacketBuffer, table Table, ruleId
// Preconditions:
// * pkt is a IPv4 packet of at least length header.IPv4MinimumSize.
// * pkt.NetworkHeader is not nil.
-func (it *IPTables) checkRule(hook Hook, pkt *PacketBuffer, table Table, ruleIdx int, r *Route, preroutingAddr tcpip.Address, inNicName, outNicName string) (RuleVerdict, int) {
+func (it *IPTables) checkRule(hook Hook, pkt *PacketBuffer, table Table, ruleIdx int, r *Route, addressEP AddressableEndpoint, inNicName, outNicName string) (RuleVerdict, int) {
rule := table.Rules[ruleIdx]
// Check whether the packet matches the IP header filter.
@@ -543,7 +543,7 @@ func (it *IPTables) checkRule(hook Hook, pkt *PacketBuffer, table Table, ruleIdx
}
// All the matchers matched, so run the target.
- return rule.Target.Action(pkt, &it.connections, hook, r, preroutingAddr)
+ return rule.Target.Action(pkt, &it.connections, hook, r, addressEP)
}
// OriginalDst returns the original destination of redirected connections. It
diff --git a/pkg/tcpip/stack/iptables_targets.go b/pkg/tcpip/stack/iptables_targets.go
index de5997e9e..e8806ebdb 100644
--- a/pkg/tcpip/stack/iptables_targets.go
+++ b/pkg/tcpip/stack/iptables_targets.go
@@ -29,7 +29,7 @@ type AcceptTarget struct {
}
// Action implements Target.Action.
-func (*AcceptTarget) Action(*PacketBuffer, *ConnTrack, Hook, *Route, tcpip.Address) (RuleVerdict, int) {
+func (*AcceptTarget) Action(*PacketBuffer, *ConnTrack, Hook, *Route, AddressableEndpoint) (RuleVerdict, int) {
return RuleAccept, 0
}
@@ -40,7 +40,7 @@ type DropTarget struct {
}
// Action implements Target.Action.
-func (*DropTarget) Action(*PacketBuffer, *ConnTrack, Hook, *Route, tcpip.Address) (RuleVerdict, int) {
+func (*DropTarget) Action(*PacketBuffer, *ConnTrack, Hook, *Route, AddressableEndpoint) (RuleVerdict, int) {
return RuleDrop, 0
}
@@ -52,7 +52,7 @@ type ErrorTarget struct {
}
// Action implements Target.Action.
-func (*ErrorTarget) Action(*PacketBuffer, *ConnTrack, Hook, *Route, tcpip.Address) (RuleVerdict, int) {
+func (*ErrorTarget) Action(*PacketBuffer, *ConnTrack, Hook, *Route, AddressableEndpoint) (RuleVerdict, int) {
log.Debugf("ErrorTarget triggered.")
return RuleDrop, 0
}
@@ -67,7 +67,7 @@ type UserChainTarget struct {
}
// Action implements Target.Action.
-func (*UserChainTarget) Action(*PacketBuffer, *ConnTrack, Hook, *Route, tcpip.Address) (RuleVerdict, int) {
+func (*UserChainTarget) Action(*PacketBuffer, *ConnTrack, Hook, *Route, AddressableEndpoint) (RuleVerdict, int) {
panic("UserChainTarget should never be called.")
}
@@ -79,7 +79,7 @@ type ReturnTarget struct {
}
// Action implements Target.Action.
-func (*ReturnTarget) Action(*PacketBuffer, *ConnTrack, Hook, *Route, tcpip.Address) (RuleVerdict, int) {
+func (*ReturnTarget) Action(*PacketBuffer, *ConnTrack, Hook, *Route, AddressableEndpoint) (RuleVerdict, int) {
return RuleReturn, 0
}
@@ -97,7 +97,7 @@ type RedirectTarget struct {
}
// Action implements Target.Action.
-func (rt *RedirectTarget) Action(pkt *PacketBuffer, ct *ConnTrack, hook Hook, r *Route, address tcpip.Address) (RuleVerdict, int) {
+func (rt *RedirectTarget) Action(pkt *PacketBuffer, ct *ConnTrack, hook Hook, r *Route, addressEP AddressableEndpoint) (RuleVerdict, int) {
// Sanity check.
if rt.NetworkProtocol != pkt.NetworkProtocolNumber {
panic(fmt.Sprintf(
@@ -117,6 +117,7 @@ func (rt *RedirectTarget) Action(pkt *PacketBuffer, ct *ConnTrack, hook Hook, r
// Change the address to loopback (127.0.0.1 or ::1) in Output and to
// the primary address of the incoming interface in Prerouting.
+ var address tcpip.Address
switch hook {
case Output:
if pkt.NetworkProtocolNumber == header.IPv4ProtocolNumber {
@@ -125,7 +126,8 @@ func (rt *RedirectTarget) Action(pkt *PacketBuffer, ct *ConnTrack, hook Hook, r
address = header.IPv6Loopback
}
case Prerouting:
- // No-op, as address is already set correctly.
+ // addressEP is expected to be set for the prerouting hook.
+ address = addressEP.MainAddress().Address
default:
panic("redirect target is supported only on output and prerouting hooks")
}
@@ -180,7 +182,7 @@ type SNATTarget struct {
}
// Action implements Target.Action.
-func (st *SNATTarget) Action(pkt *PacketBuffer, ct *ConnTrack, hook Hook, r *Route, address tcpip.Address) (RuleVerdict, int) {
+func (st *SNATTarget) Action(pkt *PacketBuffer, ct *ConnTrack, hook Hook, r *Route, _ AddressableEndpoint) (RuleVerdict, int) {
// Sanity check.
if st.NetworkProtocol != pkt.NetworkProtocolNumber {
panic(fmt.Sprintf(
diff --git a/pkg/tcpip/stack/iptables_types.go b/pkg/tcpip/stack/iptables_types.go
index 66e5f22ac..976194124 100644
--- a/pkg/tcpip/stack/iptables_types.go
+++ b/pkg/tcpip/stack/iptables_types.go
@@ -352,5 +352,5 @@ type Target interface {
// Action takes an action on the packet and returns a verdict on how
// traversal should (or should not) continue. If the return value is
// Jump, it also returns the index of the rule to jump to.
- Action(*PacketBuffer, *ConnTrack, Hook, *Route, tcpip.Address) (RuleVerdict, int)
+ Action(*PacketBuffer, *ConnTrack, Hook, *Route, AddressableEndpoint) (RuleVerdict, int)
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 08:18:38 +0000