diff --git a/clonedcheck_bsd.go b/clonedcheck_bsd.go new file mode 100644 index 0000000..b362a8b --- /dev/null +++ b/clonedcheck_bsd.go @@ -0,0 +1,7 @@ +//go:build dragonfly || freebsd || netbsd || openbsd + +package netroute + +func skipCloned(_ int, _ *rtInfo) bool { + return false +} diff --git a/clonedcheck_darwin.go b/clonedcheck_darwin.go new file mode 100644 index 0000000..1f54ea2 --- /dev/null +++ b/clonedcheck_darwin.go @@ -0,0 +1,7 @@ +package netroute + +import "syscall" + +func skipCloned(flags int, routeInfo *rtInfo) bool { + return flags&syscall.RTF_CLONING != 0 && routeInfo.Dst.String() == "0.0.0.0/0" && routeInfo.Gateway == nil +} diff --git a/go.mod b/go.mod index a0f8b6c..8d80eff 100644 --- a/go.mod +++ b/go.mod @@ -4,6 +4,7 @@ go 1.18 require ( github.com/google/gopacket v1.1.19 + github.com/sirupsen/logrus v1.9.3 golang.org/x/net v0.0.0-20220923203811-8be639271d50 golang.org/x/sys v0.0.0-20220919091848-fb04ddd9f9c8 ) diff --git a/go.sum b/go.sum index 67e780c..48d93a3 100644 --- a/go.sum +++ b/go.sum @@ -1,5 +1,15 @@ +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= +github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= github.com/google/gopacket v1.1.19 h1:ves8RnFZPGiFnTS0uPQStjwru6uO6h+nlr9j6fL7kF8= github.com/google/gopacket v1.1.19/go.mod h1:iJ8V8n6KS+z2U1A8pUwu8bW5SyEMkXJB8Yo/Vo+TKTo= +github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM= +github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4= +github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ= +github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ= +github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= +github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY= +github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg= golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w= golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= golang.org/x/lint v0.0.0-20200302205851-738671d3881b/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY= @@ -11,8 +21,12 @@ golang.org/x/net v0.0.0-20220923203811-8be639271d50/go.mod h1:YDH+HFinaLZZlnHAfS golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= golang.org/x/sys v0.0.0-20220919091848-fb04ddd9f9c8 h1:h+EGohizhe9XlX18rfpa8k8RAc5XyaeamM+0VHRd4lc= golang.org/x/sys v0.0.0-20220919091848-fb04ddd9f9c8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28= golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= +gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo= +gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= diff --git a/netroute_bsd.go b/netroute_bsd.go index cad94a9..8f02b23 100644 --- a/netroute_bsd.go +++ b/netroute_bsd.go @@ -19,6 +19,7 @@ import ( "syscall" "github.com/google/gopacket/routing" + log "github.com/sirupsen/logrus" "golang.org/x/net/route" ) @@ -112,6 +113,11 @@ func New() (routing.Router, error) { } routeInfo.OutputIface = uint32(m.Index) + if skipCloned(m.Flags, routeInfo) { + log.Tracef("skipping cloned default route without gateway: src: %s, dst: %s, interface idx: %d", routeInfo.Src, routeInfo.Dst, routeInfo.OutputIface) + continue + } + switch m.Addrs[0].(type) { case *route.Inet4Addr: rtr.v4 = append(rtr.v4, routeInfo)