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-rw-r--r--pkg/sentry/socket/netfilter/extensions.go16
-rw-r--r--pkg/sentry/socket/netfilter/ipv4.go9
-rw-r--r--pkg/sentry/socket/netfilter/ipv6.go9
-rw-r--r--pkg/sentry/socket/netfilter/netfilter.go18
-rw-r--r--pkg/sentry/socket/netfilter/owner_matcher.go24
-rw-r--r--pkg/sentry/socket/netfilter/targets.go4
-rw-r--r--pkg/sentry/socket/netfilter/tcp_matcher.go5
-rw-r--r--pkg/sentry/socket/netfilter/udp_matcher.go5
-rw-r--r--pkg/sentry/socket/netstack/netstack.go8
9 files changed, 39 insertions, 59 deletions
diff --git a/pkg/sentry/socket/netfilter/extensions.go b/pkg/sentry/socket/netfilter/extensions.go
index 6fc7781ad..3f1b4a17b 100644
--- a/pkg/sentry/socket/netfilter/extensions.go
+++ b/pkg/sentry/socket/netfilter/extensions.go
@@ -19,20 +19,12 @@ import (
"gvisor.dev/gvisor/pkg/abi/linux"
"gvisor.dev/gvisor/pkg/bits"
+ "gvisor.dev/gvisor/pkg/sentry/kernel"
"gvisor.dev/gvisor/pkg/syserr"
"gvisor.dev/gvisor/pkg/tcpip"
"gvisor.dev/gvisor/pkg/tcpip/stack"
)
-// TODO(gvisor.dev/issue/170): The following per-matcher params should be
-// supported:
-// - Table name
-// - Match size
-// - User size
-// - Hooks
-// - Proto
-// - Family
-
// matchMaker knows how to (un)marshal the matcher named name().
type matchMaker interface {
// name is the matcher name as stored in the xt_entry_match struct.
@@ -43,7 +35,7 @@ type matchMaker interface {
// unmarshal converts from the ABI matcher struct to an
// stack.Matcher.
- unmarshal(buf []byte, filter stack.IPHeaderFilter) (stack.Matcher, error)
+ unmarshal(task *kernel.Task, buf []byte, filter stack.IPHeaderFilter) (stack.Matcher, error)
}
type matcher interface {
@@ -94,12 +86,12 @@ func marshalEntryMatch(name string, data []byte) []byte {
return buf
}
-func unmarshalMatcher(match linux.XTEntryMatch, filter stack.IPHeaderFilter, buf []byte) (stack.Matcher, error) {
+func unmarshalMatcher(task *kernel.Task, match linux.XTEntryMatch, filter stack.IPHeaderFilter, buf []byte) (stack.Matcher, error) {
matchMaker, ok := matchMakers[match.Name.String()]
if !ok {
return nil, fmt.Errorf("unsupported matcher with name %q", match.Name.String())
}
- return matchMaker.unmarshal(buf, filter)
+ return matchMaker.unmarshal(task, buf, filter)
}
// targetMaker knows how to (un)marshal a target. Once registered,
diff --git a/pkg/sentry/socket/netfilter/ipv4.go b/pkg/sentry/socket/netfilter/ipv4.go
index cb78ef60b..d8bd86292 100644
--- a/pkg/sentry/socket/netfilter/ipv4.go
+++ b/pkg/sentry/socket/netfilter/ipv4.go
@@ -18,6 +18,7 @@ import (
"fmt"
"gvisor.dev/gvisor/pkg/abi/linux"
+ "gvisor.dev/gvisor/pkg/sentry/kernel"
"gvisor.dev/gvisor/pkg/syserr"
"gvisor.dev/gvisor/pkg/tcpip"
"gvisor.dev/gvisor/pkg/tcpip/header"
@@ -123,7 +124,7 @@ func getEntries4(table stack.Table, tablename linux.TableName) (linux.KernelIPTG
return entries, info
}
-func modifyEntries4(stk *stack.Stack, optVal []byte, replace *linux.IPTReplace, table *stack.Table) (map[uint32]int, *syserr.Error) {
+func modifyEntries4(task *kernel.Task, stk *stack.Stack, optVal []byte, replace *linux.IPTReplace, table *stack.Table) (map[uint32]int, *syserr.Error) {
nflog("set entries: setting entries in table %q", replace.Name.String())
// Convert input into a list of rules and their offsets.
@@ -148,23 +149,19 @@ func modifyEntries4(stk *stack.Stack, optVal []byte, replace *linux.IPTReplace,
return nil, syserr.ErrInvalidArgument
}
- // TODO(gvisor.dev/issue/170): We should support more IPTIP
- // filtering fields.
filter, err := filterFromIPTIP(entry.IP)
if err != nil {
nflog("bad iptip: %v", err)
return nil, syserr.ErrInvalidArgument
}
- // TODO(gvisor.dev/issue/170): Matchers and targets can specify
- // that they only work for certain protocols, hooks, tables.
// Get matchers.
matchersSize := entry.TargetOffset - linux.SizeOfIPTEntry
if len(optVal) < int(matchersSize) {
nflog("entry doesn't have enough room for its matchers (only %d bytes remain)", len(optVal))
return nil, syserr.ErrInvalidArgument
}
- matchers, err := parseMatchers(filter, optVal[:matchersSize])
+ matchers, err := parseMatchers(task, filter, optVal[:matchersSize])
if err != nil {
nflog("failed to parse matchers: %v", err)
return nil, syserr.ErrInvalidArgument
diff --git a/pkg/sentry/socket/netfilter/ipv6.go b/pkg/sentry/socket/netfilter/ipv6.go
index 5cb7fe4aa..c68230847 100644
--- a/pkg/sentry/socket/netfilter/ipv6.go
+++ b/pkg/sentry/socket/netfilter/ipv6.go
@@ -18,6 +18,7 @@ import (
"fmt"
"gvisor.dev/gvisor/pkg/abi/linux"
+ "gvisor.dev/gvisor/pkg/sentry/kernel"
"gvisor.dev/gvisor/pkg/syserr"
"gvisor.dev/gvisor/pkg/tcpip"
"gvisor.dev/gvisor/pkg/tcpip/header"
@@ -126,7 +127,7 @@ func getEntries6(table stack.Table, tablename linux.TableName) (linux.KernelIP6T
return entries, info
}
-func modifyEntries6(stk *stack.Stack, optVal []byte, replace *linux.IPTReplace, table *stack.Table) (map[uint32]int, *syserr.Error) {
+func modifyEntries6(task *kernel.Task, stk *stack.Stack, optVal []byte, replace *linux.IPTReplace, table *stack.Table) (map[uint32]int, *syserr.Error) {
nflog("set entries: setting entries in table %q", replace.Name.String())
// Convert input into a list of rules and their offsets.
@@ -151,23 +152,19 @@ func modifyEntries6(stk *stack.Stack, optVal []byte, replace *linux.IPTReplace,
return nil, syserr.ErrInvalidArgument
}
- // TODO(gvisor.dev/issue/170): We should support more IPTIP
- // filtering fields.
filter, err := filterFromIP6TIP(entry.IPv6)
if err != nil {
nflog("bad iptip: %v", err)
return nil, syserr.ErrInvalidArgument
}
- // TODO(gvisor.dev/issue/170): Matchers and targets can specify
- // that they only work for certain protocols, hooks, tables.
// Get matchers.
matchersSize := entry.TargetOffset - linux.SizeOfIP6TEntry
if len(optVal) < int(matchersSize) {
nflog("entry doesn't have enough room for its matchers (only %d bytes remain)", len(optVal))
return nil, syserr.ErrInvalidArgument
}
- matchers, err := parseMatchers(filter, optVal[:matchersSize])
+ matchers, err := parseMatchers(task, filter, optVal[:matchersSize])
if err != nil {
nflog("failed to parse matchers: %v", err)
return nil, syserr.ErrInvalidArgument
diff --git a/pkg/sentry/socket/netfilter/netfilter.go b/pkg/sentry/socket/netfilter/netfilter.go
index e1c4b06fc..e3eade180 100644
--- a/pkg/sentry/socket/netfilter/netfilter.go
+++ b/pkg/sentry/socket/netfilter/netfilter.go
@@ -174,13 +174,12 @@ func setHooksAndUnderflow(info *linux.IPTGetinfo, table stack.Table, offset uint
// SetEntries sets iptables rules for a single table. See
// net/ipv4/netfilter/ip_tables.c:translate_table for reference.
-func SetEntries(stk *stack.Stack, optVal []byte, ipv6 bool) *syserr.Error {
+func SetEntries(task *kernel.Task, stk *stack.Stack, optVal []byte, ipv6 bool) *syserr.Error {
var replace linux.IPTReplace
replaceBuf := optVal[:linux.SizeOfIPTReplace]
optVal = optVal[linux.SizeOfIPTReplace:]
replace.UnmarshalBytes(replaceBuf)
- // TODO(gvisor.dev/issue/170): Support other tables.
var table stack.Table
switch replace.Name.String() {
case filterTable:
@@ -188,16 +187,16 @@ func SetEntries(stk *stack.Stack, optVal []byte, ipv6 bool) *syserr.Error {
case natTable:
table = stack.EmptyNATTable()
default:
- nflog("we don't yet support writing to the %q table (gvisor.dev/issue/170)", replace.Name.String())
+ nflog("unknown iptables table %q", replace.Name.String())
return syserr.ErrInvalidArgument
}
var err *syserr.Error
var offsets map[uint32]int
if ipv6 {
- offsets, err = modifyEntries6(stk, optVal, &replace, &table)
+ offsets, err = modifyEntries6(task, stk, optVal, &replace, &table)
} else {
- offsets, err = modifyEntries4(stk, optVal, &replace, &table)
+ offsets, err = modifyEntries4(task, stk, optVal, &replace, &table)
}
if err != nil {
return err
@@ -272,7 +271,6 @@ func SetEntries(stk *stack.Stack, optVal []byte, ipv6 bool) *syserr.Error {
table.Rules[ruleIdx] = rule
}
- // TODO(gvisor.dev/issue/170): Support other chains.
// Since we don't support FORWARD, yet, make sure all other chains point to
// ACCEPT rules.
for hook, ruleIdx := range table.BuiltinChains {
@@ -287,7 +285,7 @@ func SetEntries(stk *stack.Stack, optVal []byte, ipv6 bool) *syserr.Error {
}
}
- // TODO(gvisor.dev/issue/170): Check the following conditions:
+ // TODO(gvisor.dev/issue/6167): Check the following conditions:
// - There are no loops.
// - There are no chains without an unconditional final rule.
// - There are no chains without an unconditional underflow rule.
@@ -297,7 +295,7 @@ func SetEntries(stk *stack.Stack, optVal []byte, ipv6 bool) *syserr.Error {
// parseMatchers parses 0 or more matchers from optVal. optVal should contain
// only the matchers.
-func parseMatchers(filter stack.IPHeaderFilter, optVal []byte) ([]stack.Matcher, error) {
+func parseMatchers(task *kernel.Task, filter stack.IPHeaderFilter, optVal []byte) ([]stack.Matcher, error) {
nflog("set entries: parsing matchers of size %d", len(optVal))
var matchers []stack.Matcher
for len(optVal) > 0 {
@@ -321,13 +319,13 @@ func parseMatchers(filter stack.IPHeaderFilter, optVal []byte) ([]stack.Matcher,
}
// Parse the specific matcher.
- matcher, err := unmarshalMatcher(match, filter, optVal[linux.SizeOfXTEntryMatch:match.MatchSize])
+ matcher, err := unmarshalMatcher(task, match, filter, optVal[linux.SizeOfXTEntryMatch:match.MatchSize])
if err != nil {
return nil, fmt.Errorf("failed to create matcher: %v", err)
}
matchers = append(matchers, matcher)
- // TODO(gvisor.dev/issue/170): Check the revision field.
+ // TODO(gvisor.dev/issue/6167): Check the revision field.
optVal = optVal[match.MatchSize:]
}
diff --git a/pkg/sentry/socket/netfilter/owner_matcher.go b/pkg/sentry/socket/netfilter/owner_matcher.go
index 60845cab3..6eff2ae65 100644
--- a/pkg/sentry/socket/netfilter/owner_matcher.go
+++ b/pkg/sentry/socket/netfilter/owner_matcher.go
@@ -19,6 +19,8 @@ import (
"gvisor.dev/gvisor/pkg/abi/linux"
"gvisor.dev/gvisor/pkg/marshal"
+ "gvisor.dev/gvisor/pkg/sentry/kernel"
+ "gvisor.dev/gvisor/pkg/sentry/kernel/auth"
"gvisor.dev/gvisor/pkg/tcpip/stack"
)
@@ -40,8 +42,8 @@ func (ownerMarshaler) name() string {
func (ownerMarshaler) marshal(mr matcher) []byte {
matcher := mr.(*OwnerMatcher)
iptOwnerInfo := linux.IPTOwnerInfo{
- UID: matcher.uid,
- GID: matcher.gid,
+ UID: uint32(matcher.uid),
+ GID: uint32(matcher.gid),
}
// Support for UID and GID match.
@@ -63,7 +65,7 @@ func (ownerMarshaler) marshal(mr matcher) []byte {
}
// unmarshal implements matchMaker.unmarshal.
-func (ownerMarshaler) unmarshal(buf []byte, filter stack.IPHeaderFilter) (stack.Matcher, error) {
+func (ownerMarshaler) unmarshal(task *kernel.Task, buf []byte, filter stack.IPHeaderFilter) (stack.Matcher, error) {
if len(buf) < linux.SizeOfIPTOwnerInfo {
return nil, fmt.Errorf("buf has insufficient size for owner match: %d", len(buf))
}
@@ -72,11 +74,12 @@ func (ownerMarshaler) unmarshal(buf []byte, filter stack.IPHeaderFilter) (stack.
// exceed what's strictly necessary to hold matchData.
var matchData linux.IPTOwnerInfo
matchData.UnmarshalUnsafe(buf[:linux.SizeOfIPTOwnerInfo])
- nflog("parseMatchers: parsed IPTOwnerInfo: %+v", matchData)
+ nflog("parsed IPTOwnerInfo: %+v", matchData)
var owner OwnerMatcher
- owner.uid = matchData.UID
- owner.gid = matchData.GID
+ creds := task.Credentials()
+ owner.uid = creds.UserNamespace.MapToKUID(auth.UID(matchData.UID))
+ owner.gid = creds.UserNamespace.MapToKGID(auth.GID(matchData.GID))
// Check flags.
if matchData.Match&linux.XT_OWNER_UID != 0 {
@@ -97,8 +100,8 @@ func (ownerMarshaler) unmarshal(buf []byte, filter stack.IPHeaderFilter) (stack.
// OwnerMatcher matches against a UID and/or GID.
type OwnerMatcher struct {
- uid uint32
- gid uint32
+ uid auth.KUID
+ gid auth.KGID
matchUID bool
matchGID bool
invertUID bool
@@ -113,7 +116,6 @@ func (*OwnerMatcher) name() string {
// Match implements Matcher.Match.
func (om *OwnerMatcher) Match(hook stack.Hook, pkt *stack.PacketBuffer, _, _ string) (bool, bool) {
// Support only for OUTPUT chain.
- // TODO(gvisor.dev/issue/170): Need to support for POSTROUTING chain also.
if hook != stack.Output {
return false, true
}
@@ -126,7 +128,7 @@ func (om *OwnerMatcher) Match(hook stack.Hook, pkt *stack.PacketBuffer, _, _ str
var matches bool
// Check for UID match.
if om.matchUID {
- if pkt.Owner.UID() == om.uid {
+ if auth.KUID(pkt.Owner.KUID()) == om.uid {
matches = true
}
if matches == om.invertUID {
@@ -137,7 +139,7 @@ func (om *OwnerMatcher) Match(hook stack.Hook, pkt *stack.PacketBuffer, _, _ str
// Check for GID match.
if om.matchGID {
matches = false
- if pkt.Owner.GID() == om.gid {
+ if auth.KGID(pkt.Owner.KGID()) == om.gid {
matches = true
}
if matches == om.invertGID {
diff --git a/pkg/sentry/socket/netfilter/targets.go b/pkg/sentry/socket/netfilter/targets.go
index fa5456eee..7d83e708f 100644
--- a/pkg/sentry/socket/netfilter/targets.go
+++ b/pkg/sentry/socket/netfilter/targets.go
@@ -331,7 +331,6 @@ func (*redirectTargetMaker) unmarshal(buf []byte, filter stack.IPHeaderFilter) (
return nil, syserr.ErrInvalidArgument
}
- // TODO(gvisor.dev/issue/170): Check if the flags are valid.
// Also check if we need to map ports or IP.
// For now, redirect target only supports destination port change.
// Port range and IP range are not supported yet.
@@ -340,7 +339,6 @@ func (*redirectTargetMaker) unmarshal(buf []byte, filter stack.IPHeaderFilter) (
return nil, syserr.ErrInvalidArgument
}
- // TODO(gvisor.dev/issue/170): Port range is not supported yet.
if nfRange.RangeIPV4.MinPort != nfRange.RangeIPV4.MaxPort {
nflog("redirectTargetMaker: MinPort != MaxPort (%d, %d)", nfRange.RangeIPV4.MinPort, nfRange.RangeIPV4.MaxPort)
return nil, syserr.ErrInvalidArgument
@@ -502,7 +500,6 @@ func (*snatTargetMakerV4) unmarshal(buf []byte, filter stack.IPHeaderFilter) (ta
return nil, syserr.ErrInvalidArgument
}
- // TODO(gvisor.dev/issue/170): Port range is not supported yet.
if nfRange.RangeIPV4.MinPort != nfRange.RangeIPV4.MaxPort {
nflog("snatTargetMakerV4: MinPort != MaxPort (%d, %d)", nfRange.RangeIPV4.MinPort, nfRange.RangeIPV4.MaxPort)
return nil, syserr.ErrInvalidArgument
@@ -594,7 +591,6 @@ func (*snatTargetMakerV6) unmarshal(buf []byte, filter stack.IPHeaderFilter) (ta
// translateToStandardTarget translates from the value in a
// linux.XTStandardTarget to an stack.Verdict.
func translateToStandardTarget(val int32, netProto tcpip.NetworkProtocolNumber) (target, *syserr.Error) {
- // TODO(gvisor.dev/issue/170): Support other verdicts.
switch val {
case -linux.NF_ACCEPT - 1:
return &acceptTarget{stack.AcceptTarget{
diff --git a/pkg/sentry/socket/netfilter/tcp_matcher.go b/pkg/sentry/socket/netfilter/tcp_matcher.go
index 95bb9826e..e5b73a976 100644
--- a/pkg/sentry/socket/netfilter/tcp_matcher.go
+++ b/pkg/sentry/socket/netfilter/tcp_matcher.go
@@ -19,6 +19,7 @@ import (
"gvisor.dev/gvisor/pkg/abi/linux"
"gvisor.dev/gvisor/pkg/marshal"
+ "gvisor.dev/gvisor/pkg/sentry/kernel"
"gvisor.dev/gvisor/pkg/tcpip/header"
"gvisor.dev/gvisor/pkg/tcpip/stack"
)
@@ -50,7 +51,7 @@ func (tcpMarshaler) marshal(mr matcher) []byte {
}
// unmarshal implements matchMaker.unmarshal.
-func (tcpMarshaler) unmarshal(buf []byte, filter stack.IPHeaderFilter) (stack.Matcher, error) {
+func (tcpMarshaler) unmarshal(_ *kernel.Task, buf []byte, filter stack.IPHeaderFilter) (stack.Matcher, error) {
if len(buf) < linux.SizeOfXTTCP {
return nil, fmt.Errorf("buf has insufficient size for TCP match: %d", len(buf))
}
@@ -95,8 +96,6 @@ func (*TCPMatcher) name() string {
// Match implements Matcher.Match.
func (tm *TCPMatcher) Match(hook stack.Hook, pkt *stack.PacketBuffer, _, _ string) (bool, bool) {
- // TODO(gvisor.dev/issue/170): Proto checks should ultimately be moved
- // into the stack.Check codepath as matchers are added.
switch pkt.NetworkProtocolNumber {
case header.IPv4ProtocolNumber:
netHeader := header.IPv4(pkt.NetworkHeader().View())
diff --git a/pkg/sentry/socket/netfilter/udp_matcher.go b/pkg/sentry/socket/netfilter/udp_matcher.go
index fb8be27e6..aa72ee70c 100644
--- a/pkg/sentry/socket/netfilter/udp_matcher.go
+++ b/pkg/sentry/socket/netfilter/udp_matcher.go
@@ -19,6 +19,7 @@ import (
"gvisor.dev/gvisor/pkg/abi/linux"
"gvisor.dev/gvisor/pkg/marshal"
+ "gvisor.dev/gvisor/pkg/sentry/kernel"
"gvisor.dev/gvisor/pkg/tcpip/header"
"gvisor.dev/gvisor/pkg/tcpip/stack"
)
@@ -50,7 +51,7 @@ func (udpMarshaler) marshal(mr matcher) []byte {
}
// unmarshal implements matchMaker.unmarshal.
-func (udpMarshaler) unmarshal(buf []byte, filter stack.IPHeaderFilter) (stack.Matcher, error) {
+func (udpMarshaler) unmarshal(_ *kernel.Task, buf []byte, filter stack.IPHeaderFilter) (stack.Matcher, error) {
if len(buf) < linux.SizeOfXTUDP {
return nil, fmt.Errorf("buf has insufficient size for UDP match: %d", len(buf))
}
@@ -92,8 +93,6 @@ func (*UDPMatcher) name() string {
// Match implements Matcher.Match.
func (um *UDPMatcher) Match(hook stack.Hook, pkt *stack.PacketBuffer, _, _ string) (bool, bool) {
- // TODO(gvisor.dev/issue/170): Proto checks should ultimately be moved
- // into the stack.Check codepath as matchers are added.
switch pkt.NetworkProtocolNumber {
case header.IPv4ProtocolNumber:
netHeader := header.IPv4(pkt.NetworkHeader().View())
diff --git a/pkg/sentry/socket/netstack/netstack.go b/pkg/sentry/socket/netstack/netstack.go
index d4b1bad67..11ba80497 100644
--- a/pkg/sentry/socket/netstack/netstack.go
+++ b/pkg/sentry/socket/netstack/netstack.go
@@ -2105,10 +2105,10 @@ func setSockOptIPv6(t *kernel.Task, s socket.SocketOps, ep commonEndpoint, name
return syserr.ErrNoDevice
}
// Stack must be a netstack stack.
- return netfilter.SetEntries(stack.(*Stack).Stack, optVal, true)
+ return netfilter.SetEntries(t, stack.(*Stack).Stack, optVal, true)
case linux.IP6T_SO_SET_ADD_COUNTERS:
- // TODO(gvisor.dev/issue/170): Counter support.
+ log.Infof("IP6T_SO_SET_ADD_COUNTERS is not supported")
return nil
default:
@@ -2348,10 +2348,10 @@ func setSockOptIP(t *kernel.Task, s socket.SocketOps, ep commonEndpoint, name in
return syserr.ErrNoDevice
}
// Stack must be a netstack stack.
- return netfilter.SetEntries(stack.(*Stack).Stack, optVal, false)
+ return netfilter.SetEntries(t, stack.(*Stack).Stack, optVal, false)
case linux.IPT_SO_SET_ADD_COUNTERS:
- // TODO(gvisor.dev/issue/170): Counter support.
+ log.Infof("IPT_SO_SET_ADD_COUNTERS is not supported")
return nil
case linux.IP_ADD_SOURCE_MEMBERSHIP,
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 05:14:47 +0000