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attacks.go
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/
attacks.go
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package http
import (
"context"
"io"
"io/ioutil"
"net"
"net/http"
"time"
"github.com/lucas-clemente/quic-go/h2quic"
"github.com/valyala/fasthttp"
)
// GetFloodAttack is our generic interface that allows us to execute a get flood
type GetFloodAttack interface {
SetAttacker(*Attacker)
Get() error
}
// FastHTTPGet implements our GetFloodAttack
type FastHTTPGet struct {
attacker *Attacker
client *fasthttp.Client
}
var _ GetFloodAttack = &FastHTTPGet{}
// SetAttacker sets the attacker and instantiates the client
func (f *FastHTTPGet) SetAttacker(a *Attacker) {
f.attacker = a
f.client = &fasthttp.Client{
TLSConfig: f.attacker.Config.TLSConfig,
ReadTimeout: f.attacker.Config.Timeout,
WriteTimeout: f.attacker.Config.Timeout,
}
}
// Get does what it says it will
func (f *FastHTTPGet) Get() error {
req := fasthttp.AcquireRequest()
defer fasthttp.ReleaseRequest(req)
req.Header.SetMethod("GET")
req.SetRequestURI(f.attacker.Config.url.String())
req.Header.SetHost(f.attacker.Config.url.Hostname())
req.SetConnectionClose()
resp := fasthttp.AcquireResponse()
defer fasthttp.ReleaseResponse(resp)
if err := f.client.Do(req, resp); err != nil {
return err
}
if _, err := resp.WriteTo(ioutil.Discard); err != nil {
return err
}
return nil
}
// RegHTTPGet implements our GET flood using the regular net/http
type RegHTTPGet struct {
attacker *Attacker
client *http.Client
}
var _ GetFloodAttack = &RegHTTPGet{}
// SetAttacker ....
func (r *RegHTTPGet) SetAttacker(a *Attacker) {
r.attacker = a
if a.Config.Quic {
r.client = &http.Client{
Transport: &h2quic.QuicRoundTripper{},
}
return
}
r.client = &http.Client{
Transport: &http.Transport{
Proxy: http.ProxyFromEnvironment,
DialContext: (&net.Dialer{
Timeout: r.attacker.Config.Timeout,
KeepAlive: 30 * time.Second,
}).DialContext,
MaxIdleConns: 100,
IdleConnTimeout: r.attacker.Config.Timeout,
TLSHandshakeTimeout: r.attacker.Config.Timeout,
ExpectContinueTimeout: r.attacker.Config.Timeout,
},
}
}
// Get ...
func (r *RegHTTPGet) Get() error {
ourReq, err := http.NewRequest("GET", r.attacker.Config.url.String(), nil)
if err != nil {
return err
}
ctx := context.TODO()
var cancelfunc context.CancelFunc
ctx, cancelfunc = context.WithTimeout(ctx, r.attacker.Config.Timeout)
defer cancelfunc()
ourReq = ourReq.WithContext(ctx)
resp, err := r.client.Do(ourReq)
if err != nil {
return err
}
if _, err := io.Copy(ioutil.Discard, resp.Body); err != nil {
return err
}
return nil
}