diff options
Diffstat (limited to 'pkg/tcpip/transport/icmp')
-rw-r--r-- | pkg/tcpip/transport/icmp/BUILD | 40 | ||||
-rwxr-xr-x | pkg/tcpip/transport/icmp/icmp_packet_list.go | 173 | ||||
-rwxr-xr-x | pkg/tcpip/transport/icmp/icmp_state_autogen.go | 92 |
3 files changed, 265 insertions, 40 deletions
diff --git a/pkg/tcpip/transport/icmp/BUILD b/pkg/tcpip/transport/icmp/BUILD deleted file mode 100644 index ac18ec5b1..000000000 --- a/pkg/tcpip/transport/icmp/BUILD +++ /dev/null @@ -1,40 +0,0 @@ -load("//tools:defs.bzl", "go_library") -load("//tools/go_generics:defs.bzl", "go_template_instance") - -package(licenses = ["notice"]) - -go_template_instance( - name = "icmp_packet_list", - out = "icmp_packet_list.go", - package = "icmp", - prefix = "icmpPacket", - template = "//pkg/ilist:generic_list", - types = { - "Element": "*icmpPacket", - "Linker": "*icmpPacket", - }, -) - -go_library( - name = "icmp", - srcs = [ - "endpoint.go", - "endpoint_state.go", - "icmp_packet_list.go", - "protocol.go", - ], - imports = ["gvisor.dev/gvisor/pkg/tcpip/buffer"], - visibility = ["//visibility:public"], - deps = [ - "//pkg/sleep", - "//pkg/sync", - "//pkg/tcpip", - "//pkg/tcpip/buffer", - "//pkg/tcpip/header", - "//pkg/tcpip/iptables", - "//pkg/tcpip/stack", - "//pkg/tcpip/transport/raw", - "//pkg/tcpip/transport/tcp", - "//pkg/waiter", - ], -) diff --git a/pkg/tcpip/transport/icmp/icmp_packet_list.go b/pkg/tcpip/transport/icmp/icmp_packet_list.go new file mode 100755 index 000000000..1b35e5b4a --- /dev/null +++ b/pkg/tcpip/transport/icmp/icmp_packet_list.go @@ -0,0 +1,173 @@ +package icmp + +// ElementMapper provides an identity mapping by default. +// +// This can be replaced to provide a struct that maps elements to linker +// objects, if they are not the same. An ElementMapper is not typically +// required if: Linker is left as is, Element is left as is, or Linker and +// Element are the same type. +type icmpPacketElementMapper struct{} + +// linkerFor maps an Element to a Linker. +// +// This default implementation should be inlined. +// +//go:nosplit +func (icmpPacketElementMapper) linkerFor(elem *icmpPacket) *icmpPacket { return elem } + +// List is an intrusive list. Entries can be added to or removed from the list +// in O(1) time and with no additional memory allocations. +// +// The zero value for List is an empty list ready to use. +// +// To iterate over a list (where l is a List): +// for e := l.Front(); e != nil; e = e.Next() { +// // do something with e. +// } +// +// +stateify savable +type icmpPacketList struct { + head *icmpPacket + tail *icmpPacket +} + +// Reset resets list l to the empty state. +func (l *icmpPacketList) Reset() { + l.head = nil + l.tail = nil +} + +// Empty returns true iff the list is empty. +func (l *icmpPacketList) Empty() bool { + return l.head == nil +} + +// Front returns the first element of list l or nil. +func (l *icmpPacketList) Front() *icmpPacket { + return l.head +} + +// Back returns the last element of list l or nil. +func (l *icmpPacketList) Back() *icmpPacket { + return l.tail +} + +// PushFront inserts the element e at the front of list l. +func (l *icmpPacketList) PushFront(e *icmpPacket) { + icmpPacketElementMapper{}.linkerFor(e).SetNext(l.head) + icmpPacketElementMapper{}.linkerFor(e).SetPrev(nil) + + if l.head != nil { + icmpPacketElementMapper{}.linkerFor(l.head).SetPrev(e) + } else { + l.tail = e + } + + l.head = e +} + +// PushBack inserts the element e at the back of list l. +func (l *icmpPacketList) PushBack(e *icmpPacket) { + icmpPacketElementMapper{}.linkerFor(e).SetNext(nil) + icmpPacketElementMapper{}.linkerFor(e).SetPrev(l.tail) + + if l.tail != nil { + icmpPacketElementMapper{}.linkerFor(l.tail).SetNext(e) + } else { + l.head = e + } + + l.tail = e +} + +// PushBackList inserts list m at the end of list l, emptying m. +func (l *icmpPacketList) PushBackList(m *icmpPacketList) { + if l.head == nil { + l.head = m.head + l.tail = m.tail + } else if m.head != nil { + icmpPacketElementMapper{}.linkerFor(l.tail).SetNext(m.head) + icmpPacketElementMapper{}.linkerFor(m.head).SetPrev(l.tail) + + l.tail = m.tail + } + + m.head = nil + m.tail = nil +} + +// InsertAfter inserts e after b. +func (l *icmpPacketList) InsertAfter(b, e *icmpPacket) { + a := icmpPacketElementMapper{}.linkerFor(b).Next() + icmpPacketElementMapper{}.linkerFor(e).SetNext(a) + icmpPacketElementMapper{}.linkerFor(e).SetPrev(b) + icmpPacketElementMapper{}.linkerFor(b).SetNext(e) + + if a != nil { + icmpPacketElementMapper{}.linkerFor(a).SetPrev(e) + } else { + l.tail = e + } +} + +// InsertBefore inserts e before a. +func (l *icmpPacketList) InsertBefore(a, e *icmpPacket) { + b := icmpPacketElementMapper{}.linkerFor(a).Prev() + icmpPacketElementMapper{}.linkerFor(e).SetNext(a) + icmpPacketElementMapper{}.linkerFor(e).SetPrev(b) + icmpPacketElementMapper{}.linkerFor(a).SetPrev(e) + + if b != nil { + icmpPacketElementMapper{}.linkerFor(b).SetNext(e) + } else { + l.head = e + } +} + +// Remove removes e from l. +func (l *icmpPacketList) Remove(e *icmpPacket) { + prev := icmpPacketElementMapper{}.linkerFor(e).Prev() + next := icmpPacketElementMapper{}.linkerFor(e).Next() + + if prev != nil { + icmpPacketElementMapper{}.linkerFor(prev).SetNext(next) + } else { + l.head = next + } + + if next != nil { + icmpPacketElementMapper{}.linkerFor(next).SetPrev(prev) + } else { + l.tail = prev + } +} + +// Entry is a default implementation of Linker. Users can add anonymous fields +// of this type to their structs to make them automatically implement the +// methods needed by List. +// +// +stateify savable +type icmpPacketEntry struct { + next *icmpPacket + prev *icmpPacket +} + +// Next returns the entry that follows e in the list. +func (e *icmpPacketEntry) Next() *icmpPacket { + return e.next +} + +// Prev returns the entry that precedes e in the list. +func (e *icmpPacketEntry) Prev() *icmpPacket { + return e.prev +} + +// SetNext assigns 'entry' as the entry that follows e in the list. +func (e *icmpPacketEntry) SetNext(elem *icmpPacket) { + e.next = elem +} + +// SetPrev assigns 'entry' as the entry that precedes e in the list. +func (e *icmpPacketEntry) SetPrev(elem *icmpPacket) { + e.prev = elem +} diff --git a/pkg/tcpip/transport/icmp/icmp_state_autogen.go b/pkg/tcpip/transport/icmp/icmp_state_autogen.go new file mode 100755 index 000000000..b856a4b89 --- /dev/null +++ b/pkg/tcpip/transport/icmp/icmp_state_autogen.go @@ -0,0 +1,92 @@ +// automatically generated by stateify. + +package icmp + +import ( + "gvisor.dev/gvisor/pkg/state" + "gvisor.dev/gvisor/pkg/tcpip/buffer" +) + +func (x *icmpPacket) beforeSave() {} +func (x *icmpPacket) save(m state.Map) { + x.beforeSave() + var data buffer.VectorisedView = x.saveData() + m.SaveValue("data", data) + m.Save("icmpPacketEntry", &x.icmpPacketEntry) + m.Save("senderAddress", &x.senderAddress) + m.Save("timestamp", &x.timestamp) +} + +func (x *icmpPacket) afterLoad() {} +func (x *icmpPacket) load(m state.Map) { + m.Load("icmpPacketEntry", &x.icmpPacketEntry) + m.Load("senderAddress", &x.senderAddress) + m.Load("timestamp", &x.timestamp) + m.LoadValue("data", new(buffer.VectorisedView), func(y interface{}) { x.loadData(y.(buffer.VectorisedView)) }) +} + +func (x *endpoint) save(m state.Map) { + x.beforeSave() + var rcvBufSizeMax int = x.saveRcvBufSizeMax() + m.SaveValue("rcvBufSizeMax", rcvBufSizeMax) + m.Save("TransportEndpointInfo", &x.TransportEndpointInfo) + m.Save("waiterQueue", &x.waiterQueue) + m.Save("uniqueID", &x.uniqueID) + m.Save("rcvReady", &x.rcvReady) + m.Save("rcvList", &x.rcvList) + m.Save("rcvBufSize", &x.rcvBufSize) + m.Save("rcvClosed", &x.rcvClosed) + m.Save("sndBufSize", &x.sndBufSize) + m.Save("shutdownFlags", &x.shutdownFlags) + m.Save("state", &x.state) + m.Save("ttl", &x.ttl) +} + +func (x *endpoint) load(m state.Map) { + m.Load("TransportEndpointInfo", &x.TransportEndpointInfo) + m.Load("waiterQueue", &x.waiterQueue) + m.Load("uniqueID", &x.uniqueID) + m.Load("rcvReady", &x.rcvReady) + m.Load("rcvList", &x.rcvList) + m.Load("rcvBufSize", &x.rcvBufSize) + m.Load("rcvClosed", &x.rcvClosed) + m.Load("sndBufSize", &x.sndBufSize) + m.Load("shutdownFlags", &x.shutdownFlags) + m.Load("state", &x.state) + m.Load("ttl", &x.ttl) + m.LoadValue("rcvBufSizeMax", new(int), func(y interface{}) { x.loadRcvBufSizeMax(y.(int)) }) + m.AfterLoad(x.afterLoad) +} + +func (x *icmpPacketList) beforeSave() {} +func (x *icmpPacketList) save(m state.Map) { + x.beforeSave() + m.Save("head", &x.head) + m.Save("tail", &x.tail) +} + +func (x *icmpPacketList) afterLoad() {} +func (x *icmpPacketList) load(m state.Map) { + m.Load("head", &x.head) + m.Load("tail", &x.tail) +} + +func (x *icmpPacketEntry) beforeSave() {} +func (x *icmpPacketEntry) save(m state.Map) { + x.beforeSave() + m.Save("next", &x.next) + m.Save("prev", &x.prev) +} + +func (x *icmpPacketEntry) afterLoad() {} +func (x *icmpPacketEntry) load(m state.Map) { + m.Load("next", &x.next) + m.Load("prev", &x.prev) +} + +func init() { + state.Register("pkg/tcpip/transport/icmp.icmpPacket", (*icmpPacket)(nil), state.Fns{Save: (*icmpPacket).save, Load: (*icmpPacket).load}) + state.Register("pkg/tcpip/transport/icmp.endpoint", (*endpoint)(nil), state.Fns{Save: (*endpoint).save, Load: (*endpoint).load}) + state.Register("pkg/tcpip/transport/icmp.icmpPacketList", (*icmpPacketList)(nil), state.Fns{Save: (*icmpPacketList).save, Load: (*icmpPacketList).load}) + state.Register("pkg/tcpip/transport/icmp.icmpPacketEntry", (*icmpPacketEntry)(nil), state.Fns{Save: (*icmpPacketEntry).save, Load: (*icmpPacketEntry).load}) +} |