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punt_vppcalls.go
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punt_vppcalls.go
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// Copyright (c) 2018 Cisco and/or its affiliates.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at:
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package vpp1901
import (
"strings"
"github.com/pkg/errors"
punt "github.com/ligato/vpp-agent/api/models/vpp/punt"
ba_ip "github.com/ligato/vpp-agent/plugins/vpp/binapi/vpp1901/ip"
ba_punt "github.com/ligato/vpp-agent/plugins/vpp/binapi/vpp1901/punt"
)
const PuntSocketHeaderVersion = 1
// AddPunt configures new punt entry
func (h *PuntVppHandler) AddPunt(p *punt.ToHost) error {
return h.handlePuntToHost(p, true)
}
// DeletePunt removes punt entry
func (h *PuntVppHandler) DeletePunt(p *punt.ToHost) error {
return h.handlePuntToHost(p, false)
}
func (h *PuntVppHandler) handlePuntToHost(toHost *punt.ToHost, isAdd bool) error {
req := &ba_punt.SetPunt{
IsAdd: boolToUint(isAdd),
Punt: ba_punt.Punt{
IPv: resolveL3Proto(toHost.L3Protocol),
L4Protocol: resolveL4Proto(toHost.L4Protocol),
L4Port: uint16(toHost.Port),
},
}
reply := &ba_punt.SetPuntReply{}
h.log.Debugf("Setting punt: %+v", req.Punt)
if err := h.callsChannel.SendRequest(req).ReceiveReply(reply); err != nil {
return err
}
return nil
}
// RegisterPuntSocket registers new punt to socket
func (h *PuntVppHandler) RegisterPuntSocket(toHost *punt.ToHost) (string, error) {
req := &ba_punt.PuntSocketRegister{
HeaderVersion: PuntSocketHeaderVersion,
Punt: ba_punt.Punt{
IPv: resolveL3Proto(toHost.L3Protocol),
L4Protocol: resolveL4Proto(toHost.L4Protocol),
L4Port: uint16(toHost.Port),
},
Pathname: []byte(toHost.SocketPath),
}
reply := &ba_punt.PuntSocketRegisterReply{}
h.log.Debugf("Registering punt socket: %+v (pathname: %s)", req.Punt, req.Pathname)
if err := h.callsChannel.SendRequest(req).ReceiveReply(reply); err != nil {
return "", err
}
h.log.Infof("Punt socket registered with %s", reply.Pathname)
p := *toHost
p.SocketPath = strings.SplitN(string(reply.Pathname), "\x00", 2)[0]
socketPathMap[toHost.Port] = &p
/*if h.RegisterSocketFn != nil {
h.RegisterSocketFn(true, toHost, p.SocketPath)
}*/
return p.SocketPath, nil
}
// DeregisterPuntSocket removes existing punt to socket sogistration
func (h *PuntVppHandler) DeregisterPuntSocket(toHost *punt.ToHost) error {
req := &ba_punt.PuntSocketDeregister{
Punt: ba_punt.Punt{
IPv: resolveL3Proto(toHost.L3Protocol),
L4Protocol: resolveL4Proto(toHost.L4Protocol),
L4Port: uint16(toHost.Port),
},
}
reply := &ba_punt.PuntSocketDeregisterReply{}
if err := h.callsChannel.SendRequest(req).ReceiveReply(reply); err != nil {
return err
}
/*if h.RegisterSocketFn != nil {
if p, ok := socketPathMap[toHost.Port]; ok {
h.RegisterSocketFn(false, toHost, p.SocketPath)
}
}*/
delete(socketPathMap, toHost.Port)
return nil
}
// AddPuntRedirect adds new redirect entry
func (h *PuntVppHandler) AddPuntRedirect(puntCfg *punt.IPRedirect) error {
if puntCfg.L3Protocol == punt.L3Protocol_IPv4 || puntCfg.L3Protocol == punt.L3Protocol_ALL {
if err := h.handlePuntRedirectIPv4(puntCfg, true); err != nil {
return err
}
}
if puntCfg.L3Protocol == punt.L3Protocol_IPv6 || puntCfg.L3Protocol == punt.L3Protocol_ALL {
if err := h.handlePuntRedirectIPv6(puntCfg, true); err != nil {
return err
}
}
return nil
}
// DeletePuntRedirect removes existing redirect entry
func (h *PuntVppHandler) DeletePuntRedirect(puntCfg *punt.IPRedirect) error {
if puntCfg.L3Protocol == punt.L3Protocol_IPv4 || puntCfg.L3Protocol == punt.L3Protocol_ALL {
if err := h.handlePuntRedirectIPv4(puntCfg, false); err != nil {
return err
}
}
if puntCfg.L3Protocol == punt.L3Protocol_IPv6 || puntCfg.L3Protocol == punt.L3Protocol_ALL {
if err := h.handlePuntRedirectIPv6(puntCfg, false); err != nil {
return err
}
}
return nil
}
func (h *PuntVppHandler) handlePuntRedirectIPv4(punt *punt.IPRedirect, isAdd bool) error {
return h.handlePuntRedirect(punt, true, isAdd)
}
func (h *PuntVppHandler) handlePuntRedirectIPv6(punt *punt.IPRedirect, isAdd bool) error {
return h.handlePuntRedirect(punt, false, isAdd)
}
func (h *PuntVppHandler) handlePuntRedirect(punt *punt.IPRedirect, isIPv4, isAdd bool) error {
// rx interface
var rxIfIdx uint32
if punt.RxInterface == "" {
rxIfIdx = ^uint32(0)
} else {
rxMetadata, exists := h.ifIndexes.LookupByName(punt.RxInterface)
if !exists {
return errors.Errorf("index not found for interface %s", punt.RxInterface)
}
rxIfIdx = rxMetadata.SwIfIndex
}
// tx interface
txMetadata, exists := h.ifIndexes.LookupByName(punt.TxInterface)
if !exists {
return errors.Errorf("index not found for interface %s", punt.TxInterface)
}
// next hop address
// - remove mask from IP address if necessary
nextHopStr := punt.NextHop
ipParts := strings.Split(punt.NextHop, "/")
if len(ipParts) > 1 {
h.log.Debugf("IP punt redirect next hop IP address %s is defined with mask, removing it")
nextHopStr = ipParts[0]
}
nextHop, err := ipToAddress(nextHopStr)
if err != nil {
return err
}
req := &ba_ip.IPPuntRedirect{
IsAdd: boolToUint(isAdd),
Punt: ba_ip.PuntRedirect{
RxSwIfIndex: rxIfIdx,
TxSwIfIndex: txMetadata.SwIfIndex,
Nh: nextHop,
},
}
reply := &ba_ip.IPPuntRedirectReply{}
if err := h.callsChannel.SendRequest(req).ReceiveReply(reply); err != nil {
return err
}
return nil
}
func parseL3Proto(p uint8) punt.L3Protocol {
switch p {
case uint8(punt.L3Protocol_IPv4), uint8(punt.L3Protocol_IPv6):
return punt.L3Protocol(p)
case ^uint8(0):
return punt.L3Protocol_ALL
}
return punt.L3Protocol_UNDEFINED_L3
}
func parseL4Proto(p uint8) punt.L4Protocol {
switch p {
case uint8(punt.L4Protocol_TCP):
return punt.L4Protocol_TCP
case uint8(punt.L4Protocol_UDP):
return punt.L4Protocol_UDP
}
return punt.L4Protocol_UNDEFINED_L4
}
func resolveL3Proto(protocol punt.L3Protocol) uint8 {
switch protocol {
case punt.L3Protocol_IPv4:
return uint8(punt.L3Protocol_IPv4)
case punt.L3Protocol_IPv6:
return uint8(punt.L3Protocol_IPv6)
case punt.L3Protocol_ALL:
return ^uint8(0) // binary API representation for both protocols
}
return uint8(punt.L3Protocol_UNDEFINED_L3)
}
func resolveL4Proto(protocol punt.L4Protocol) uint8 {
switch protocol {
case punt.L4Protocol_TCP:
return uint8(punt.L4Protocol_TCP)
case punt.L4Protocol_UDP:
return uint8(punt.L4Protocol_UDP)
}
return uint8(punt.L4Protocol_UNDEFINED_L4)
}
func boolToUint(input bool) uint8 {
if input {
return 1
}
return 0
}