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author | Valentin Rothberg <rothberg@redhat.com> | 2019-01-08 14:52:57 +0100 |
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committer | Valentin Rothberg <rothberg@redhat.com> | 2019-01-11 13:38:11 +0100 |
commit | bd40dcfc2bc7c9014ea1f33482fb63aacbcdfe87 (patch) | |
tree | 5f06e4e289f16d9164d692590a3fe6541b5384cf /vendor/github.com/vishvananda/netlink/addr_linux.go | |
parent | 545f24421247c9f6251a634764db3f8f8070a812 (diff) | |
download | podman-bd40dcfc2bc7c9014ea1f33482fb63aacbcdfe87.tar.gz podman-bd40dcfc2bc7c9014ea1f33482fb63aacbcdfe87.tar.bz2 podman-bd40dcfc2bc7c9014ea1f33482fb63aacbcdfe87.zip |
vendor: update everything
* If possible, update each dependency to the latest available version.
* Use releases over commit IDs and avoid vendoring branches.
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Diffstat (limited to 'vendor/github.com/vishvananda/netlink/addr_linux.go')
-rw-r--r-- | vendor/github.com/vishvananda/netlink/addr_linux.go | 126 |
1 files changed, 96 insertions, 30 deletions
diff --git a/vendor/github.com/vishvananda/netlink/addr_linux.go b/vendor/github.com/vishvananda/netlink/addr_linux.go index f33242a7c..d59c3281e 100644 --- a/vendor/github.com/vishvananda/netlink/addr_linux.go +++ b/vendor/github.com/vishvananda/netlink/addr_linux.go @@ -2,13 +2,13 @@ package netlink import ( "fmt" - "log" "net" "strings" "syscall" "github.com/vishvananda/netlink/nl" "github.com/vishvananda/netns" + "golang.org/x/sys/unix" ) // IFA_FLAGS is a u32 attribute. @@ -23,7 +23,7 @@ func AddrAdd(link Link, addr *Addr) error { // AddrAdd will add an IP address to a link device. // Equivalent to: `ip addr add $addr dev $link` func (h *Handle) AddrAdd(link Link, addr *Addr) error { - req := h.newNetlinkRequest(syscall.RTM_NEWADDR, syscall.NLM_F_CREATE|syscall.NLM_F_EXCL|syscall.NLM_F_ACK) + req := h.newNetlinkRequest(unix.RTM_NEWADDR, unix.NLM_F_CREATE|unix.NLM_F_EXCL|unix.NLM_F_ACK) return h.addrHandle(link, addr, req) } @@ -36,7 +36,7 @@ func AddrReplace(link Link, addr *Addr) error { // AddrReplace will replace (or, if not present, add) an IP address on a link device. // Equivalent to: `ip addr replace $addr dev $link` func (h *Handle) AddrReplace(link Link, addr *Addr) error { - req := h.newNetlinkRequest(syscall.RTM_NEWADDR, syscall.NLM_F_CREATE|syscall.NLM_F_REPLACE|syscall.NLM_F_ACK) + req := h.newNetlinkRequest(unix.RTM_NEWADDR, unix.NLM_F_CREATE|unix.NLM_F_REPLACE|unix.NLM_F_ACK) return h.addrHandle(link, addr, req) } @@ -49,7 +49,7 @@ func AddrDel(link Link, addr *Addr) error { // AddrDel will delete an IP address from a link device. // Equivalent to: `ip addr del $addr dev $link` func (h *Handle) AddrDel(link Link, addr *Addr) error { - req := h.newNetlinkRequest(syscall.RTM_DELADDR, syscall.NLM_F_ACK) + req := h.newNetlinkRequest(unix.RTM_DELADDR, unix.NLM_F_ACK) return h.addrHandle(link, addr, req) } @@ -65,7 +65,7 @@ func (h *Handle) addrHandle(link Link, addr *Addr, req *nl.NetlinkRequest) error msg := nl.NewIfAddrmsg(family) msg.Index = uint32(base.Index) msg.Scope = uint8(addr.Scope) - prefixlen, _ := addr.Mask.Size() + prefixlen, masklen := addr.Mask.Size() msg.Prefixlen = uint8(prefixlen) req.AddData(msg) @@ -76,7 +76,7 @@ func (h *Handle) addrHandle(link Link, addr *Addr, req *nl.NetlinkRequest) error localAddrData = addr.IP.To16() } - localData := nl.NewRtAttr(syscall.IFA_LOCAL, localAddrData) + localData := nl.NewRtAttr(unix.IFA_LOCAL, localAddrData) req.AddData(localData) var peerAddrData []byte if addr.Peer != nil { @@ -89,7 +89,7 @@ func (h *Handle) addrHandle(link Link, addr *Addr, req *nl.NetlinkRequest) error peerAddrData = localAddrData } - addressData := nl.NewRtAttr(syscall.IFA_ADDRESS, peerAddrData) + addressData := nl.NewRtAttr(unix.IFA_ADDRESS, peerAddrData) req.AddData(addressData) if addr.Flags != 0 { @@ -103,16 +103,34 @@ func (h *Handle) addrHandle(link Link, addr *Addr, req *nl.NetlinkRequest) error } } - if addr.Broadcast != nil { - req.AddData(nl.NewRtAttr(syscall.IFA_BROADCAST, addr.Broadcast)) + if family == FAMILY_V4 { + if addr.Broadcast == nil { + calcBroadcast := make(net.IP, masklen/8) + for i := range localAddrData { + calcBroadcast[i] = localAddrData[i] | ^addr.Mask[i] + } + addr.Broadcast = calcBroadcast + } + req.AddData(nl.NewRtAttr(unix.IFA_BROADCAST, addr.Broadcast)) + + if addr.Label != "" { + labelData := nl.NewRtAttr(unix.IFA_LABEL, nl.ZeroTerminated(addr.Label)) + req.AddData(labelData) + } } - if addr.Label != "" { - labelData := nl.NewRtAttr(syscall.IFA_LABEL, nl.ZeroTerminated(addr.Label)) - req.AddData(labelData) + // 0 is the default value for these attributes. However, 0 means "expired", while the least-surprising default + // value should be "forever". To compensate for that, only add the attributes if at least one of the values is + // non-zero, which means the caller has explicitly set them + if addr.ValidLft > 0 || addr.PreferedLft > 0 { + cachedata := nl.IfaCacheInfo{ + IfaValid: uint32(addr.ValidLft), + IfaPrefered: uint32(addr.PreferedLft), + } + req.AddData(nl.NewRtAttr(unix.IFA_CACHEINFO, cachedata.Serialize())) } - _, err := req.Execute(syscall.NETLINK_ROUTE, 0) + _, err := req.Execute(unix.NETLINK_ROUTE, 0) return err } @@ -127,11 +145,11 @@ func AddrList(link Link, family int) ([]Addr, error) { // Equivalent to: `ip addr show`. // The list can be filtered by link and ip family. func (h *Handle) AddrList(link Link, family int) ([]Addr, error) { - req := h.newNetlinkRequest(syscall.RTM_GETADDR, syscall.NLM_F_DUMP) + req := h.newNetlinkRequest(unix.RTM_GETADDR, unix.NLM_F_DUMP) msg := nl.NewIfInfomsg(family) req.AddData(msg) - msgs, err := req.Execute(syscall.NETLINK_ROUTE, syscall.RTM_NEWADDR) + msgs, err := req.Execute(unix.NETLINK_ROUTE, unix.RTM_NEWADDR) if err != nil { return nil, err } @@ -183,21 +201,21 @@ func parseAddr(m []byte) (addr Addr, family, index int, err error) { var local, dst *net.IPNet for _, attr := range attrs { switch attr.Attr.Type { - case syscall.IFA_ADDRESS: + case unix.IFA_ADDRESS: dst = &net.IPNet{ IP: attr.Value, Mask: net.CIDRMask(int(msg.Prefixlen), 8*len(attr.Value)), } addr.Peer = dst - case syscall.IFA_LOCAL: + case unix.IFA_LOCAL: local = &net.IPNet{ IP: attr.Value, Mask: net.CIDRMask(int(msg.Prefixlen), 8*len(attr.Value)), } addr.IPNet = local - case syscall.IFA_BROADCAST: + case unix.IFA_BROADCAST: addr.Broadcast = attr.Value - case syscall.IFA_LABEL: + case unix.IFA_LABEL: addr.Label = string(attr.Value[:len(attr.Value)-1]) case IFA_FLAGS: addr.Flags = int(native.Uint32(attr.Value[0:4])) @@ -232,17 +250,36 @@ type AddrUpdate struct { // AddrSubscribe takes a chan down which notifications will be sent // when addresses change. Close the 'done' chan to stop subscription. func AddrSubscribe(ch chan<- AddrUpdate, done <-chan struct{}) error { - return addrSubscribe(netns.None(), netns.None(), ch, done) + return addrSubscribeAt(netns.None(), netns.None(), ch, done, nil, false) } // AddrSubscribeAt works like AddrSubscribe plus it allows the caller // to choose the network namespace in which to subscribe (ns). func AddrSubscribeAt(ns netns.NsHandle, ch chan<- AddrUpdate, done <-chan struct{}) error { - return addrSubscribe(ns, netns.None(), ch, done) + return addrSubscribeAt(ns, netns.None(), ch, done, nil, false) +} + +// AddrSubscribeOptions contains a set of options to use with +// AddrSubscribeWithOptions. +type AddrSubscribeOptions struct { + Namespace *netns.NsHandle + ErrorCallback func(error) + ListExisting bool } -func addrSubscribe(newNs, curNs netns.NsHandle, ch chan<- AddrUpdate, done <-chan struct{}) error { - s, err := nl.SubscribeAt(newNs, curNs, syscall.NETLINK_ROUTE, syscall.RTNLGRP_IPV4_IFADDR, syscall.RTNLGRP_IPV6_IFADDR) +// AddrSubscribeWithOptions work like AddrSubscribe but enable to +// provide additional options to modify the behavior. Currently, the +// namespace can be provided as well as an error callback. +func AddrSubscribeWithOptions(ch chan<- AddrUpdate, done <-chan struct{}, options AddrSubscribeOptions) error { + if options.Namespace == nil { + none := netns.None() + options.Namespace = &none + } + return addrSubscribeAt(*options.Namespace, netns.None(), ch, done, options.ErrorCallback, options.ListExisting) +} + +func addrSubscribeAt(newNs, curNs netns.NsHandle, ch chan<- AddrUpdate, done <-chan struct{}, cberr func(error), listExisting bool) error { + s, err := nl.SubscribeAt(newNs, curNs, unix.NETLINK_ROUTE, unix.RTNLGRP_IPV4_IFADDR, unix.RTNLGRP_IPV6_IFADDR) if err != nil { return err } @@ -252,30 +289,59 @@ func addrSubscribe(newNs, curNs netns.NsHandle, ch chan<- AddrUpdate, done <-cha s.Close() }() } + if listExisting { + req := pkgHandle.newNetlinkRequest(unix.RTM_GETADDR, + unix.NLM_F_DUMP) + infmsg := nl.NewIfInfomsg(unix.AF_UNSPEC) + req.AddData(infmsg) + if err := s.Send(req); err != nil { + return err + } + } go func() { defer close(ch) for { msgs, err := s.Receive() if err != nil { - log.Printf("netlink.AddrSubscribe: Receive() error: %v", err) + if cberr != nil { + cberr(err) + } return } for _, m := range msgs { - msgType := m.Header.Type - if msgType != syscall.RTM_NEWADDR && msgType != syscall.RTM_DELADDR { - log.Printf("netlink.AddrSubscribe: bad message type: %d", msgType) + if m.Header.Type == unix.NLMSG_DONE { continue } + if m.Header.Type == unix.NLMSG_ERROR { + native := nl.NativeEndian() + error := int32(native.Uint32(m.Data[0:4])) + if error == 0 { + continue + } + if cberr != nil { + cberr(syscall.Errno(-error)) + } + return + } + msgType := m.Header.Type + if msgType != unix.RTM_NEWADDR && msgType != unix.RTM_DELADDR { + if cberr != nil { + cberr(fmt.Errorf("bad message type: %d", msgType)) + } + return + } addr, _, ifindex, err := parseAddr(m.Data) if err != nil { - log.Printf("netlink.AddrSubscribe: could not parse address: %v", err) - continue + if cberr != nil { + cberr(fmt.Errorf("could not parse address: %v", err)) + } + return } ch <- AddrUpdate{LinkAddress: *addr.IPNet, LinkIndex: ifindex, - NewAddr: msgType == syscall.RTM_NEWADDR, + NewAddr: msgType == unix.RTM_NEWADDR, Flags: addr.Flags, Scope: addr.Scope, PreferedLft: addr.PreferedLft, |