Compare commits
4 Commits
v2.1.0.bet
...
master
| Author | SHA1 | Date |
|---|---|---|
 兔子
|
a227ee9e6c | 6 days ago |
|
兔子
|
9fc353211f | 7 days ago |
|
兔子
|
1d478bef0a | 2 weeks ago |
|
兔子
|
44678fa0ff | 3 weeks ago |
@ -0,0 +1,852 @@
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// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// HTTP reverse proxy handler
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package rp
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import (
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"context"
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"errors"
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"fmt"
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"io"
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"log"
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"mime"
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"net"
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"net/http"
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"net/http/httptrace"
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"net/textproto"
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"net/url"
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"strings"
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"sync"
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"time"
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"golang.org/x/net/http/httpguts"
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)
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func lower(b byte) byte {
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if 'A' <= b && b <= 'Z' {
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return b + ('a' - 'A')
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}
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return b
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}
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func EqualFold(s, t string) bool {
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if len(s) != len(t) {
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return false
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}
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for i := 0; i < len(s); i++ {
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if lower(s[i]) != lower(t[i]) {
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return false
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}
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}
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return true
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}
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func IsPrint(s string) bool {
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for i := 0; i < len(s); i++ {
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if s[i] < ' ' || s[i] > '~' {
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return false
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}
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}
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return true
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}
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// A ProxyRequest contains a request to be rewritten by a ReverseProxy.
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type ProxyRequest struct {
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// In is the request received by the proxy.
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// The Rewrite function must not modify In.
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In *http.Request
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// Out is the request which will be sent by the proxy.
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// The Rewrite function may modify or replace this request.
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// Hop-by-hop headers are removed from this request
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// before Rewrite is called.
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Out *http.Request
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}
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// SetURL routes the outbound request to the scheme, host, and base path
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// provided in target. If the target's path is "/base" and the incoming
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// request was for "/dir", the target request will be for "/base/dir".
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//
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// SetURL rewrites the outbound Host header to match the target's host.
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// To preserve the inbound request's Host header (the default behavior
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// of NewSingleHostReverseProxy):
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//
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// rewriteFunc := func(r *httputil.ProxyRequest) {
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// r.SetURL(url)
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// r.Out.Host = r.In.Host
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// }
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func (r *ProxyRequest) SetURL(target *url.URL) {
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rewriteRequestURL(r.Out, target)
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r.Out.Host = ""
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}
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// SetXForwarded sets the X-Forwarded-For, X-Forwarded-Host, and
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// X-Forwarded-Proto headers of the outbound request.
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//
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// - The X-Forwarded-For header is set to the client IP address.
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// - The X-Forwarded-Host header is set to the host name requested
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// by the client.
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// - The X-Forwarded-Proto header is set to "http" or "https", depending
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// on whether the inbound request was made on a TLS-enabled connection.
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//
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// If the outbound request contains an existing X-Forwarded-For header,
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// SetXForwarded appends the client IP address to it. To append to the
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// inbound request's X-Forwarded-For header (the default behavior of
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// ReverseProxy when using a Director function), copy the header
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// from the inbound request before calling SetXForwarded:
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//
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// rewriteFunc := func(r *httputil.ProxyRequest) {
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// r.Out.Header["X-Forwarded-For"] = r.In.Header["X-Forwarded-For"]
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// r.SetXForwarded()
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// }
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func (r *ProxyRequest) SetXForwarded() {
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clientIP, _, err := net.SplitHostPort(r.In.RemoteAddr)
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if err == nil {
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prior := r.Out.Header["X-Forwarded-For"]
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if len(prior) > 0 {
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clientIP = strings.Join(prior, ", ") + ", " + clientIP
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}
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r.Out.Header.Set("X-Forwarded-For", clientIP)
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} else {
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r.Out.Header.Del("X-Forwarded-For")
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}
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r.Out.Header.Set("X-Forwarded-Host", r.In.Host)
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if r.In.TLS == nil {
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r.Out.Header.Set("X-Forwarded-Proto", "http")
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} else {
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r.Out.Header.Set("X-Forwarded-Proto", "https")
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}
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}
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// ReverseProxy is an HTTP Handler that takes an incoming request and
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// sends it to another server, proxying the response back to the
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// client.
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//
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// 1xx responses are forwarded to the client if the underlying
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// transport supports ClientTrace.Got1xxResponse.
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type ReverseProxy struct {
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// Rewrite must be a function which modifies
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// the request into a new request to be sent
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// using Transport. Its response is then copied
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// back to the original client unmodified.
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// Rewrite must not access the provided ProxyRequest
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// or its contents after returning.
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//
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// The Forwarded, X-Forwarded, X-Forwarded-Host,
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// and X-Forwarded-Proto headers are removed from the
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// outbound request before Rewrite is called. See also
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// the ProxyRequest.SetXForwarded method.
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//
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// Unparsable query parameters are removed from the
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// outbound request before Rewrite is called.
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// The Rewrite function may copy the inbound URL's
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// RawQuery to the outbound URL to preserve the original
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// parameter string. Note that this can lead to security
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// issues if the proxy's interpretation of query parameters
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// does not match that of the downstream server.
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//
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// At most one of Rewrite or Director may be set.
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Rewrite func(*ProxyRequest)
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// Director is a function which modifies
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// the request into a new request to be sent
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// using Transport. Its response is then copied
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// back to the original client unmodified.
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// Director must not access the provided Request
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// after returning.
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//
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// By default, the X-Forwarded-For header is set to the
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// value of the client IP address. If an X-Forwarded-For
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// header already exists, the client IP is appended to the
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// existing values. As a special case, if the header
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// exists in the Request.Header map but has a nil value
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// (such as when set by the Director func), the X-Forwarded-For
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// header is not modified.
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//
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// To prevent IP spoofing, be sure to delete any pre-existing
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// X-Forwarded-For header coming from the client or
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// an untrusted proxy.
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//
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// Hop-by-hop headers are removed from the request after
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// Director returns, which can remove headers added by
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// Director. Use a Rewrite function instead to ensure
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// modifications to the request are preserved.
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//
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// Unparsable query parameters are removed from the outbound
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// request if Request.Form is set after Director returns.
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//
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// At most one of Rewrite or Director may be set.
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Director func(*http.Request)
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// The transport used to perform proxy requests.
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// If nil, http.DefaultTransport is used.
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Transport http.RoundTripper
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// FlushInterval specifies the flush interval
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// to flush to the client while copying the
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// response body.
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// If zero, no periodic flushing is done.
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// A negative value means to flush immediately
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// after each write to the client.
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// The FlushInterval is ignored when ReverseProxy
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// recognizes a response as a streaming response, or
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// if its ContentLength is -1; for such responses, writes
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// are flushed to the client immediately.
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FlushInterval time.Duration
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// ErrorLog specifies an optional logger for errors
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// that occur when attempting to proxy the request.
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// If nil, logging is done via the log package's standard logger.
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ErrorLog *log.Logger
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// BufferPool optionally specifies a buffer pool to
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// get byte slices for use by io.CopyBuffer when
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// copying HTTP response bodies.
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BufferPool BufferPool
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// ModifyResponse is an optional function that modifies the
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// Response from the backend. It is called if the backend
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// returns a response at all, with any HTTP status code.
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// If the backend is unreachable, the optional ErrorHandler is
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// called without any call to ModifyResponse.
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//
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// If ModifyResponse returns an error, ErrorHandler is called
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// with its error value. If ErrorHandler is nil, its default
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// implementation is used.
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ModifyResponse func(*http.Response) error
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// ErrorHandler is an optional function that handles errors
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// reaching the backend or errors from ModifyResponse.
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//
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// If nil, the default is to log the provided error and return
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// a 502 Status Bad Gateway response.
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ErrorHandler func(http.ResponseWriter, *http.Request, error)
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}
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// A BufferPool is an interface for getting and returning temporary
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// byte slices for use by io.CopyBuffer.
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type BufferPool interface {
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Get() []byte
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Put([]byte)
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}
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func singleJoiningSlash(a, b string) string {
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aslash := strings.HasSuffix(a, "/")
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bslash := strings.HasPrefix(b, "/")
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switch {
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case aslash && bslash:
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return a + b[1:]
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case !aslash && !bslash:
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return a + "/" + b
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}
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return a + b
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}
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func joinURLPath(a, b *url.URL) (path, rawpath string) {
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if a.RawPath == "" && b.RawPath == "" {
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return singleJoiningSlash(a.Path, b.Path), ""
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}
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// Same as singleJoiningSlash, but uses EscapedPath to determine
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// whether a slash should be added
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apath := a.EscapedPath()
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bpath := b.EscapedPath()
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aslash := strings.HasSuffix(apath, "/")
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bslash := strings.HasPrefix(bpath, "/")
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switch {
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case aslash && bslash:
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return a.Path + b.Path[1:], apath + bpath[1:]
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case !aslash && !bslash:
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return a.Path + "/" + b.Path, apath + "/" + bpath
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}
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return a.Path + b.Path, apath + bpath
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}
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// NewSingleHostReverseProxy returns a new ReverseProxy that routes
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// URLs to the scheme, host, and base path provided in target. If the
|
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// target's path is "/base" and the incoming request was for "/dir",
|
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// the target request will be for /base/dir.
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//
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// NewSingleHostReverseProxy does not rewrite the Host header.
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//
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// To customize the ReverseProxy behavior beyond what
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// NewSingleHostReverseProxy provides, use ReverseProxy directly
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// with a Rewrite function. The ProxyRequest SetURL method
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// may be used to route the outbound request. (Note that SetURL,
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// unlike NewSingleHostReverseProxy, rewrites the Host header
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// of the outbound request by default.)
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//
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// proxy := &ReverseProxy{
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// Rewrite: func(r *ProxyRequest) {
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// r.SetURL(target)
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// r.Out.Host = r.In.Host // if desired
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// }
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// }
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func NewSingleHostReverseProxy(target *url.URL) *ReverseProxy {
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director := func(req *http.Request) {
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rewriteRequestURL(req, target)
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}
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return &ReverseProxy{Director: director}
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}
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func rewriteRequestURL(req *http.Request, target *url.URL) {
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targetQuery := target.RawQuery
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req.URL.Scheme = target.Scheme
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req.URL.Host = target.Host
|
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req.URL.Path, req.URL.RawPath = joinURLPath(target, req.URL)
|
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if targetQuery == "" || req.URL.RawQuery == "" {
|
||||
req.URL.RawQuery = targetQuery + req.URL.RawQuery
|
||||
} else {
|
||||
req.URL.RawQuery = targetQuery + "&" + req.URL.RawQuery
|
||||
}
|
||||
}
|
||||
|
||||
func copyHeader(dst, src http.Header) {
|
||||
for k, vv := range src {
|
||||
for _, v := range vv {
|
||||
dst.Add(k, v)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Hop-by-hop headers. These are removed when sent to the backend.
|
||||
// As of RFC 7230, hop-by-hop headers are required to appear in the
|
||||
// Connection header field. These are the headers defined by the
|
||||
// obsoleted RFC 2616 (section 13.5.1) and are used for backward
|
||||
// compatibility.
|
||||
var hopHeaders = []string{
|
||||
"Connection",
|
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"Proxy-Connection", // non-standard but still sent by libcurl and rejected by e.g. google
|
||||
"Keep-Alive",
|
||||
"Proxy-Authenticate",
|
||||
"Proxy-Authorization",
|
||||
"Te", // canonicalized version of "TE"
|
||||
"Trailer", // not Trailers per URL above; https://www.rfc-editor.org/errata_search.php?eid=4522
|
||||
"Transfer-Encoding",
|
||||
"Upgrade",
|
||||
}
|
||||
|
||||
func (p *ReverseProxy) defaultErrorHandler(rw http.ResponseWriter, req *http.Request, err error) {
|
||||
p.logf("http: proxy error: %v", err)
|
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rw.WriteHeader(http.StatusBadGateway)
|
||||
}
|
||||
|
||||
func (p *ReverseProxy) getErrorHandler() func(http.ResponseWriter, *http.Request, error) {
|
||||
if p.ErrorHandler != nil {
|
||||
return p.ErrorHandler
|
||||
}
|
||||
return p.defaultErrorHandler
|
||||
}
|
||||
|
||||
// modifyResponse conditionally runs the optional ModifyResponse hook
|
||||
// and reports whether the request should proceed.
|
||||
func (p *ReverseProxy) modifyResponse(rw http.ResponseWriter, res *http.Response, req *http.Request) bool {
|
||||
if p.ModifyResponse == nil {
|
||||
return true
|
||||
}
|
||||
if err := p.ModifyResponse(res); err != nil {
|
||||
res.Body.Close()
|
||||
p.getErrorHandler()(rw, req, err)
|
||||
return false
|
||||
}
|
||||
return true
|
||||
}
|
||||
|
||||
func (p *ReverseProxy) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
|
||||
transport := p.Transport
|
||||
if transport == nil {
|
||||
transport = http.DefaultTransport
|
||||
}
|
||||
|
||||
ctx := req.Context()
|
||||
if ctx.Done() != nil {
|
||||
// CloseNotifier predates context.Context, and has been
|
||||
// entirely superseded by it. If the request contains
|
||||
// a Context that carries a cancellation signal, don't
|
||||
// bother spinning up a goroutine to watch the CloseNotify
|
||||
// channel (if any).
|
||||
//
|
||||
// If the request Context has a nil Done channel (which
|
||||
// means it is either context.Background, or a custom
|
||||
// Context implementation with no cancellation signal),
|
||||
// then consult the CloseNotifier if available.
|
||||
} else if cn, ok := rw.(http.CloseNotifier); ok {
|
||||
var cancel context.CancelFunc
|
||||
ctx, cancel = context.WithCancel(ctx)
|
||||
defer cancel()
|
||||
notifyChan := cn.CloseNotify()
|
||||
go func() {
|
||||
select {
|
||||
case <-notifyChan:
|
||||
cancel()
|
||||
case <-ctx.Done():
|
||||
}
|
||||
}()
|
||||
}
|
||||
|
||||
outreq := req.Clone(ctx)
|
||||
if req.ContentLength == 0 {
|
||||
outreq.Body = nil // Issue 16036: nil Body for http.Transport retries
|
||||
}
|
||||
if outreq.Body != nil {
|
||||
// Reading from the request body after returning from a handler is not
|
||||
// allowed, and the RoundTrip goroutine that reads the Body can outlive
|
||||
// this handler. This can lead to a crash if the handler panics (see
|
||||
// Issue 46866). Although calling Close doesn't guarantee there isn't
|
||||
// any Read in flight after the handle returns, in practice it's safe to
|
||||
// read after closing it.
|
||||
defer outreq.Body.Close()
|
||||
}
|
||||
if outreq.Header == nil {
|
||||
outreq.Header = make(http.Header) // Issue 33142: historical behavior was to always allocate
|
||||
}
|
||||
|
||||
if (p.Director != nil) == (p.Rewrite != nil) {
|
||||
p.getErrorHandler()(rw, req, errors.New("ReverseProxy must have exactly one of Director or Rewrite set"))
|
||||
return
|
||||
}
|
||||
|
||||
if p.Director != nil {
|
||||
p.Director(outreq)
|
||||
if outreq.Form != nil {
|
||||
outreq.URL.RawQuery = cleanQueryParams(outreq.URL.RawQuery)
|
||||
}
|
||||
}
|
||||
outreq.Close = false
|
||||
|
||||
reqUpType := upgradeType(outreq.Header)
|
||||
if !IsPrint(reqUpType) {
|
||||
p.getErrorHandler()(rw, req, fmt.Errorf("client tried to switch to invalid protocol %q", reqUpType))
|
||||
return
|
||||
}
|
||||
removeHopByHopHeaders(outreq.Header)
|
||||
|
||||
// Issue 21096: tell backend applications that care about trailer support
|
||||
// that we support trailers. (We do, but we don't go out of our way to
|
||||
// advertise that unless the incoming client request thought it was worth
|
||||
// mentioning.) Note that we look at req.Header, not outreq.Header, since
|
||||
// the latter has passed through removeHopByHopHeaders.
|
||||
if httpguts.HeaderValuesContainsToken(req.Header["Te"], "trailers") {
|
||||
outreq.Header.Set("Te", "trailers")
|
||||
}
|
||||
|
||||
// After stripping all the hop-by-hop connection headers above, add back any
|
||||
// necessary for protocol upgrades, such as for websockets.
|
||||
if reqUpType != "" {
|
||||
outreq.Header.Set("Connection", "Upgrade")
|
||||
outreq.Header.Set("Upgrade", reqUpType)
|
||||
}
|
||||
|
||||
if p.Rewrite != nil {
|
||||
// Strip client-provided forwarding headers.
|
||||
// The Rewrite func may use SetXForwarded to set new values
|
||||
// for these or copy the previous values from the inbound request.
|
||||
outreq.Header.Del("Forwarded")
|
||||
outreq.Header.Del("X-Forwarded-For")
|
||||
outreq.Header.Del("X-Forwarded-Host")
|
||||
outreq.Header.Del("X-Forwarded-Proto")
|
||||
|
||||
// Remove unparsable query parameters from the outbound request.
|
||||
outreq.URL.RawQuery = cleanQueryParams(outreq.URL.RawQuery)
|
||||
|
||||
pr := &ProxyRequest{
|
||||
In: req,
|
||||
Out: outreq,
|
||||
}
|
||||
p.Rewrite(pr)
|
||||
outreq = pr.Out
|
||||
}
|
||||
|
||||
if _, ok := outreq.Header["User-Agent"]; !ok {
|
||||
// If the outbound request doesn't have a User-Agent header set,
|
||||
// don't send the default Go HTTP client User-Agent.
|
||||
outreq.Header.Set("User-Agent", "")
|
||||
}
|
||||
|
||||
trace := &httptrace.ClientTrace{
|
||||
Got1xxResponse: func(code int, header textproto.MIMEHeader) error {
|
||||
h := rw.Header()
|
||||
copyHeader(h, http.Header(header))
|
||||
rw.WriteHeader(code)
|
||||
|
||||
// Clear headers, it's not automatically done by ResponseWriter.WriteHeader() for 1xx responses
|
||||
for k := range h {
|
||||
delete(h, k)
|
||||
}
|
||||
|
||||
return nil
|
||||
},
|
||||
}
|
||||
outreq = outreq.WithContext(httptrace.WithClientTrace(outreq.Context(), trace))
|
||||
|
||||
res, err := transport.RoundTrip(outreq)
|
||||
if err != nil {
|
||||
p.getErrorHandler()(rw, outreq, err)
|
||||
return
|
||||
}
|
||||
|
||||
// Deal with 101 Switching Protocols responses: (WebSocket, h2c, etc)
|
||||
if res.StatusCode == http.StatusSwitchingProtocols {
|
||||
if !p.modifyResponse(rw, res, outreq) {
|
||||
return
|
||||
}
|
||||
p.handleUpgradeResponse(rw, outreq, res)
|
||||
return
|
||||
}
|
||||
|
||||
removeHopByHopHeaders(res.Header)
|
||||
|
||||
if !p.modifyResponse(rw, res, outreq) {
|
||||
return
|
||||
}
|
||||
|
||||
copyHeader(rw.Header(), res.Header)
|
||||
|
||||
// The "Trailer" header isn't included in the Transport's response,
|
||||
// at least for *http.Transport. Build it up from Trailer.
|
||||
announcedTrailers := len(res.Trailer)
|
||||
if announcedTrailers > 0 {
|
||||
trailerKeys := make([]string, 0, len(res.Trailer))
|
||||
for k := range res.Trailer {
|
||||
trailerKeys = append(trailerKeys, k)
|
||||
}
|
||||
rw.Header().Add("Trailer", strings.Join(trailerKeys, ", "))
|
||||
}
|
||||
|
||||
rw.WriteHeader(res.StatusCode)
|
||||
|
||||
err = p.copyResponse(rw, res.Body, p.flushInterval(res))
|
||||
if err != nil {
|
||||
defer res.Body.Close()
|
||||
// Since we're streaming the response, if we run into an error all we can do
|
||||
// is abort the request. Issue 23643: ReverseProxy should use ErrAbortHandler
|
||||
// on read error while copying body.
|
||||
if !shouldPanicOnCopyError(req) {
|
||||
p.logf("suppressing panic for copyResponse error in test; copy error: %v", err)
|
||||
return
|
||||
}
|
||||
panic(http.ErrAbortHandler)
|
||||
}
|
||||
res.Body.Close() // close now, instead of defer, to populate res.Trailer
|
||||
|
||||
if len(res.Trailer) > 0 {
|
||||
// Force chunking if we saw a response trailer.
|
||||
// This prevents net/http from calculating the length for short
|
||||
// bodies and adding a Content-Length.
|
||||
if fl, ok := rw.(http.Flusher); ok {
|
||||
fl.Flush()
|
||||
}
|
||||
}
|
||||
|
||||
if len(res.Trailer) == announcedTrailers {
|
||||
copyHeader(rw.Header(), res.Trailer)
|
||||
return
|
||||
}
|
||||
|
||||
for k, vv := range res.Trailer {
|
||||
k = http.TrailerPrefix + k
|
||||
for _, v := range vv {
|
||||
rw.Header().Add(k, v)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
var inOurTests bool // whether we're in our own tests
|
||||
|
||||
// shouldPanicOnCopyError reports whether the reverse proxy should
|
||||
// panic with http.ErrAbortHandler. This is the right thing to do by
|
||||
// default, but Go 1.10 and earlier did not, so existing unit tests
|
||||
// weren't expecting panics. Only panic in our own tests, or when
|
||||
// running under the HTTP server.
|
||||
func shouldPanicOnCopyError(req *http.Request) bool {
|
||||
if inOurTests {
|
||||
// Our tests know to handle this panic.
|
||||
return true
|
||||
}
|
||||
if req.Context().Value(http.ServerContextKey) != nil {
|
||||
// We seem to be running under an HTTP server, so
|
||||
// it'll recover the panic.
|
||||
return true
|
||||
}
|
||||
// Otherwise act like Go 1.10 and earlier to not break
|
||||
// existing tests.
|
||||
return false
|
||||
}
|
||||
|
||||
// removeHopByHopHeaders removes hop-by-hop headers.
|
||||
func removeHopByHopHeaders(h http.Header) {
|
||||
// RFC 7230, section 6.1: Remove headers listed in the "Connection" header.
|
||||
for _, f := range h["Connection"] {
|
||||
for _, sf := range strings.Split(f, ",") {
|
||||
if sf = textproto.TrimString(sf); sf != "" {
|
||||
h.Del(sf)
|
||||
}
|
||||
}
|
||||
}
|
||||
// RFC 2616, section 13.5.1: Remove a set of known hop-by-hop headers.
|
||||
// This behavior is superseded by the RFC 7230 Connection header, but
|
||||
// preserve it for backwards compatibility.
|
||||
for _, f := range hopHeaders {
|
||||
h.Del(f)
|
||||
}
|
||||
}
|
||||
|
||||
// flushInterval returns the p.FlushInterval value, conditionally
|
||||
// overriding its value for a specific request/response.
|
||||
func (p *ReverseProxy) flushInterval(res *http.Response) time.Duration {
|
||||
resCT := res.Header.Get("Content-Type")
|
||||
|
||||
// For Server-Sent Events responses, flush immediately.
|
||||
// The MIME type is defined in https://www.w3.org/TR/eventsource/#text-event-stream
|
||||
if baseCT, _, _ := mime.ParseMediaType(resCT); baseCT == "text/event-stream" {
|
||||
return -1 // negative means immediately
|
||||
}
|
||||
|
||||
// We might have the case of streaming for which Content-Length might be unset.
|
||||
if res.ContentLength == -1 {
|
||||
return -1
|
||||
}
|
||||
|
||||
return p.FlushInterval
|
||||
}
|
||||
|
||||
func (p *ReverseProxy) copyResponse(dst io.Writer, src io.Reader, flushInterval time.Duration) error {
|
||||
if flushInterval != 0 {
|
||||
if wf, ok := dst.(writeFlusher); ok {
|
||||
mlw := &maxLatencyWriter{
|
||||
dst: wf,
|
||||
latency: flushInterval,
|
||||
}
|
||||
defer mlw.stop()
|
||||
|
||||
// set up initial timer so headers get flushed even if body writes are delayed
|
||||
mlw.flushPending = true
|
||||
mlw.t = time.AfterFunc(flushInterval, mlw.delayedFlush)
|
||||
|
||||
dst = mlw
|
||||
}
|
||||
}
|
||||
|
||||
var buf []byte
|
||||
if p.BufferPool != nil {
|
||||
buf = p.BufferPool.Get()
|
||||
defer p.BufferPool.Put(buf)
|
||||
}
|
||||
_, err := p.copyBuffer(dst, src, buf)
|
||||
return err
|
||||
}
|
||||
|
||||
// copyBuffer returns any write errors or non-EOF read errors, and the amount
|
||||
// of bytes written.
|
||||
func (p *ReverseProxy) copyBuffer(dst io.Writer, src io.Reader, buf []byte) (int64, error) {
|
||||
if len(buf) == 0 {
|
||||
buf = make([]byte, 32*1024)
|
||||
}
|
||||
var written int64
|
||||
for {
|
||||
nr, rerr := src.Read(buf)
|
||||
if rerr != nil && rerr != io.EOF && rerr != context.Canceled {
|
||||
p.logf("httputil: ReverseProxy read error during body copy: %v", rerr)
|
||||
}
|
||||
if nr > 0 {
|
||||
nw, werr := dst.Write(buf[:nr])
|
||||
if nw > 0 {
|
||||
written += int64(nw)
|
||||
}
|
||||
if werr != nil {
|
||||
return written, werr
|
||||
}
|
||||
if nr != nw {
|
||||
return written, io.ErrShortWrite
|
||||
}
|
||||
}
|
||||
if rerr != nil {
|
||||
if rerr == io.EOF {
|
||||
rerr = nil
|
||||
}
|
||||
return written, rerr
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (p *ReverseProxy) logf(format string, args ...any) {
|
||||
if p.ErrorLog != nil {
|
||||
p.ErrorLog.Printf(format, args...)
|
||||
} else {
|
||||
log.Printf(format, args...)
|
||||
}
|
||||
}
|
||||
|
||||
type writeFlusher interface {
|
||||
io.Writer
|
||||
http.Flusher
|
||||
}
|
||||
|
||||
type maxLatencyWriter struct {
|
||||
dst writeFlusher
|
||||
latency time.Duration // non-zero; negative means to flush immediately
|
||||
|
||||
mu sync.Mutex // protects t, flushPending, and dst.Flush
|
||||
t *time.Timer
|
||||
flushPending bool
|
||||
}
|
||||
|
||||
func (m *maxLatencyWriter) Write(p []byte) (n int, err error) {
|
||||
m.mu.Lock()
|
||||
defer m.mu.Unlock()
|
||||
n, err = m.dst.Write(p)
|
||||
if m.latency < 0 {
|
||||
m.dst.Flush()
|
||||
return
|
||||
}
|
||||
if m.flushPending {
|
||||
return
|
||||
}
|
||||
if m.t == nil {
|
||||
m.t = time.AfterFunc(m.latency, m.delayedFlush)
|
||||
} else {
|
||||
m.t.Reset(m.latency)
|
||||
}
|
||||
m.flushPending = true
|
||||
return
|
||||
}
|
||||
|
||||
func (m *maxLatencyWriter) delayedFlush() {
|
||||
m.mu.Lock()
|
||||
defer m.mu.Unlock()
|
||||
if !m.flushPending { // if stop was called but AfterFunc already started this goroutine
|
||||
return
|
||||
}
|
||||
m.dst.Flush()
|
||||
m.flushPending = false
|
||||
}
|
||||
|
||||
func (m *maxLatencyWriter) stop() {
|
||||
m.mu.Lock()
|
||||
defer m.mu.Unlock()
|
||||
m.flushPending = false
|
||||
if m.t != nil {
|
||||
m.t.Stop()
|
||||
}
|
||||
}
|
||||
|
||||
func upgradeType(h http.Header) string {
|
||||
if !httpguts.HeaderValuesContainsToken(h["Connection"], "Upgrade") {
|
||||
return ""
|
||||
}
|
||||
return h.Get("Upgrade")
|
||||
}
|
||||
|
||||
func (p *ReverseProxy) handleUpgradeResponse(rw http.ResponseWriter, req *http.Request, res *http.Response) {
|
||||
reqUpType := upgradeType(req.Header)
|
||||
resUpType := upgradeType(res.Header)
|
||||
if !IsPrint(resUpType) { // We know reqUpType is ASCII, it's checked by the caller.
|
||||
p.getErrorHandler()(rw, req, fmt.Errorf("backend tried to switch to invalid protocol %q", resUpType))
|
||||
}
|
||||
if !EqualFold(reqUpType, resUpType) {
|
||||
p.getErrorHandler()(rw, req, fmt.Errorf("backend tried to switch protocol %q when %q was requested", resUpType, reqUpType))
|
||||
return
|
||||
}
|
||||
|
||||
hj, ok := rw.(http.Hijacker)
|
||||
if !ok {
|
||||
p.getErrorHandler()(rw, req, fmt.Errorf("can't switch protocols using non-Hijacker ResponseWriter type %T", rw))
|
||||
return
|
||||
}
|
||||
backConn, ok := res.Body.(io.ReadWriteCloser)
|
||||
if !ok {
|
||||
p.getErrorHandler()(rw, req, fmt.Errorf("internal error: 101 switching protocols response with non-writable body"))
|
||||
return
|
||||
}
|
||||
|
||||
backConnCloseCh := make(chan bool)
|
||||
go func() {
|
||||
// Ensure that the cancellation of a request closes the backend.
|
||||
// See issue https://golang.org/issue/35559.
|
||||
select {
|
||||
case <-req.Context().Done():
|
||||
case <-backConnCloseCh:
|
||||
}
|
||||
backConn.Close()
|
||||
}()
|
||||
|
||||
defer close(backConnCloseCh)
|
||||
|
||||
conn, brw, err := hj.Hijack()
|
||||
if err != nil {
|
||||
p.getErrorHandler()(rw, req, fmt.Errorf("Hijack failed on protocol switch: %v", err))
|
||||
return
|
||||
}
|
||||
defer conn.Close()
|
||||
|
||||
copyHeader(rw.Header(), res.Header)
|
||||
|
||||
res.Header = rw.Header()
|
||||
res.Body = nil // so res.Write only writes the headers; we have res.Body in backConn above
|
||||
if err := res.Write(brw); err != nil {
|
||||
p.getErrorHandler()(rw, req, fmt.Errorf("response write: %v", err))
|
||||
return
|
||||
}
|
||||
if err := brw.Flush(); err != nil {
|
||||
p.getErrorHandler()(rw, req, fmt.Errorf("response flush: %v", err))
|
||||
return
|
||||
}
|
||||
errc := make(chan error, 1)
|
||||
spc := switchProtocolCopier{user: conn, backend: backConn}
|
||||
go spc.copyToBackend(errc)
|
||||
go spc.copyFromBackend(errc)
|
||||
<-errc
|
||||
}
|
||||
|
||||
// switchProtocolCopier exists so goroutines proxying data back and
|
||||
// forth have nice names in stacks.
|
||||
type switchProtocolCopier struct {
|
||||
user, backend io.ReadWriter
|
||||
}
|
||||
|
||||
func (c switchProtocolCopier) copyFromBackend(errc chan<- error) {
|
||||
_, err := io.Copy(c.user, c.backend)
|
||||
errc <- err
|
||||
}
|
||||
|
||||
func (c switchProtocolCopier) copyToBackend(errc chan<- error) {
|
||||
_, err := io.Copy(c.backend, c.user)
|
||||
errc <- err
|
||||
}
|
||||
|
||||
func cleanQueryParams(s string) string {
|
||||
reencode := func(s string) string {
|
||||
v, _ := url.ParseQuery(s)
|
||||
return v.Encode()
|
||||
}
|
||||
for i := 0; i < len(s); {
|
||||
switch s[i] {
|
||||
case ';':
|
||||
return reencode(s)
|
||||
case '%':
|
||||
if i+2 >= len(s) || !ishex(s[i+1]) || !ishex(s[i+2]) {
|
||||
return reencode(s)
|
||||
}
|
||||
i += 3
|
||||
default:
|
||||
i++
|
||||
}
|
||||
}
|
||||
return s
|
||||
}
|
||||
|
||||
func ishex(c byte) bool {
|
||||
switch {
|
||||
case '0' <= c && c <= '9':
|
||||
return true
|
||||
case 'a' <= c && c <= 'f':
|
||||
return true
|
||||
case 'A' <= c && c <= 'F':
|
||||
return true
|
||||
}
|
||||
return false
|
||||
}
|
||||
@ -0,0 +1,35 @@
|
||||
//go:build darwin
|
||||
|
||||
package net
|
||||
|
||||
import (
|
||||
"net"
|
||||
"syscall"
|
||||
)
|
||||
|
||||
func SetTcpInfo(conn *net.TCPConn, usingKeepAlive bool, keepAliveIdel, keepAlivePeriod, keepAliveCount, userTimeout int) error {
|
||||
rawConn, err := conn.SyscallConn()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if usingKeepAlive {
|
||||
err = rawConn.Control(func(fd uintptr) {
|
||||
err = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_KEEPALIVE, keepAliveIdel)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
err = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, 0x101, keepAlivePeriod)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
})
|
||||
} else {
|
||||
err = conn.SetKeepAlive(false)
|
||||
}
|
||||
if userTimeout > 0 {
|
||||
err = rawConn.Control(func(fd uintptr) {
|
||||
err = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, 0x12, userTimeout)
|
||||
})
|
||||
}
|
||||
return err
|
||||
}
|
||||
@ -0,0 +1,39 @@
|
||||
//go:build !(windows && darwin)
|
||||
|
||||
package net
|
||||
|
||||
import (
|
||||
"net"
|
||||
"syscall"
|
||||
)
|
||||
|
||||
func SetTcpInfo(conn *net.TCPConn, usingKeepAlive bool, keepAliveIdel, keepAlivePeriod, keepAliveCount, userTimeout int) error {
|
||||
rawConn, err := conn.SyscallConn()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if usingKeepAlive {
|
||||
err = rawConn.Control(func(fd uintptr) {
|
||||
err = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_KEEPIDLE, keepAliveIdel)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
err = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_KEEPINTVL, keepAlivePeriod)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
err = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_KEEPCNT, keepAliveCount)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
})
|
||||
} else {
|
||||
err = conn.SetKeepAlive(false)
|
||||
}
|
||||
if userTimeout > 0 {
|
||||
err = rawConn.Control(func(fd uintptr) {
|
||||
err = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, 0x12, userTimeout)
|
||||
})
|
||||
}
|
||||
return err
|
||||
}
|
||||
@ -0,0 +1,33 @@
|
||||
//go:build windows
|
||||
|
||||
package net
|
||||
|
||||
import (
|
||||
"net"
|
||||
"os"
|
||||
"runtime"
|
||||
"syscall"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
func SetTcpInfo(conn *net.TCPConn, usingKeepAlive bool, keepAliveIdel, keepAlivePeriod, keepAliveCount, userTimeout int) error {
|
||||
if usingKeepAlive {
|
||||
rawConn, err := conn.SyscallConn()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
err = rawConn.Control(func(fd uintptr) {
|
||||
ka := syscall.TCPKeepalive{
|
||||
OnOff: 1,
|
||||
Time: uint32(keepAliveIdel),
|
||||
Interval: uint32(keepAlivePeriod),
|
||||
}
|
||||
ret := uint32(0)
|
||||
size := uint32(unsafe.Sizeof(ka))
|
||||
err = syscall.WSAIoctl(syscall.Handle(fd), syscall.SIO_KEEPALIVE_VALS, (*byte)(unsafe.Pointer(&ka)), size, nil, 0, &ret, nil, 0)
|
||||
runtime.KeepAlive(fd)
|
||||
})
|
||||
return os.NewSyscallError("wsaioctl", err)
|
||||
}
|
||||
return conn.SetKeepAlive(false)
|
||||
}
|
||||
@ -0,0 +1,145 @@
|
||||
package net
|
||||
|
||||
import (
|
||||
"b612.me/starcrypto"
|
||||
"b612.me/starlog"
|
||||
"b612.me/starnet"
|
||||
"crypto/elliptic"
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"github.com/spf13/cobra"
|
||||
"golang.org/x/crypto/ssh"
|
||||
"net"
|
||||
"os"
|
||||
"os/signal"
|
||||
"strings"
|
||||
)
|
||||
|
||||
var (
|
||||
listenAddr string
|
||||
keyFile string
|
||||
KeyPasswd string
|
||||
outpath string
|
||||
curlUrl string
|
||||
curlArg []string
|
||||
)
|
||||
|
||||
func init() {
|
||||
cmdSSHJar.Flags().StringVarP(&listenAddr, "listen", "l", "0.0.0.0:22", "监听地址")
|
||||
cmdSSHJar.Flags().StringVarP(&keyFile, "key", "k", "", "私钥文件")
|
||||
cmdSSHJar.Flags().StringVarP(&KeyPasswd, "passwd", "p", "", "私钥密码")
|
||||
cmdSSHJar.Flags().StringVarP(&outpath, "output", "o", "", "输出文件")
|
||||
}
|
||||
|
||||
var cmdSSHJar = &cobra.Command{
|
||||
Use: "sshjar",
|
||||
Short: "SSH蜜罐",
|
||||
Long: "SSH蜜罐",
|
||||
Run: func(cmd *cobra.Command, args []string) {
|
||||
runSSHHoneyJar(listenAddr, keyFile, KeyPasswd, outpath)
|
||||
},
|
||||
}
|
||||
|
||||
func runSSHHoneyJar(listenAddr, keyFile, KeyPasswd, outpath string) {
|
||||
var f *os.File
|
||||
var err error
|
||||
if outpath != "" {
|
||||
f, err = os.OpenFile(outpath, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0644)
|
||||
if err != nil {
|
||||
starlog.Errorf("Failed to open file %s (%s)", outpath, err)
|
||||
return
|
||||
}
|
||||
}
|
||||
defer f.Close()
|
||||
config := &ssh.ServerConfig{
|
||||
// 密码验证回调函数
|
||||
PasswordCallback: func(c ssh.ConnMetadata, pass []byte) (*ssh.Permissions, error) {
|
||||
starlog.Infof("Login attempt from %s with %s %s\n", c.RemoteAddr(), c.User(), string(pass))
|
||||
data := []string{c.RemoteAddr().String(), c.User(), string(pass)}
|
||||
bts, _ := json.Marshal(data)
|
||||
if f != nil {
|
||||
f.Write(bts)
|
||||
f.Write([]byte("\n"))
|
||||
}
|
||||
if curlUrl != "" {
|
||||
go func() {
|
||||
data := map[string]string{
|
||||
"ip": c.RemoteAddr().String(),
|
||||
"user": c.User(),
|
||||
"passwd": string(pass),
|
||||
}
|
||||
if curlArg != nil && len(curlArg) > 0 {
|
||||
for _, v := range curlArg {
|
||||
args := strings.SplitN(v, ":", 2)
|
||||
if len(args) == 2 {
|
||||
data[args[0]] = args[1]
|
||||
}
|
||||
}
|
||||
starnet.Curl(starnet.NewRequests(curlUrl, []byte(starnet.BuildQuery(data)), "POST"))
|
||||
}
|
||||
}()
|
||||
}
|
||||
return nil, fmt.Errorf("password rejected for %q", c.User())
|
||||
},
|
||||
PublicKeyCallback: func(conn ssh.ConnMetadata, key ssh.PublicKey) (*ssh.Permissions, error) {
|
||||
return nil, fmt.Errorf("public key rejected for %q", conn.User())
|
||||
},
|
||||
}
|
||||
if keyFile == "" {
|
||||
secKey, _, err := starcrypto.GenerateEcdsaKey(elliptic.P256())
|
||||
if err != nil {
|
||||
starlog.Errorf("Failed to generate ECDSA key (%s)", err)
|
||||
return
|
||||
}
|
||||
key, err := ssh.NewSignerFromKey(secKey)
|
||||
if err != nil {
|
||||
starlog.Errorf("Failed to generate signer from key (%s)", err)
|
||||
return
|
||||
}
|
||||
config.AddHostKey(key)
|
||||
} else {
|
||||
keyByte, err := os.ReadFile(keyFile)
|
||||
if err != nil {
|
||||
starlog.Errorf("Failed to read private key from %s (%s)", keyFile, err)
|
||||
return
|
||||
}
|
||||
var key ssh.Signer
|
||||
if KeyPasswd != "" {
|
||||
key, err = ssh.ParsePrivateKeyWithPassphrase(keyByte, []byte(KeyPasswd))
|
||||
} else {
|
||||
key, err = ssh.ParsePrivateKey(keyByte)
|
||||
}
|
||||
if err != nil {
|
||||
starlog.Errorf("Failed to load private key from %s (%s)", keyFile, err)
|
||||
return
|
||||
}
|
||||
config.AddHostKey(key)
|
||||
}
|
||||
listener, err := net.Listen("tcp", listenAddr)
|
||||
if err != nil {
|
||||
starlog.Errorf("Failed to listen on %s (%s)", listenAddr, err)
|
||||
return
|
||||
}
|
||||
starlog.Noticeln("SSH HoneyJar is listening on", listenAddr)
|
||||
sig := make(chan os.Signal, 1)
|
||||
signal.Notify(sig, os.Interrupt, os.Kill)
|
||||
for {
|
||||
select {
|
||||
case <-sig:
|
||||
starlog.Noticef("SSH HoneyJar is shutting down")
|
||||
listener.Close()
|
||||
return
|
||||
default:
|
||||
}
|
||||
conn, err := listener.Accept()
|
||||
if err != nil {
|
||||
continue
|
||||
}
|
||||
starlog.Infof("New connection from %s\n", conn.RemoteAddr())
|
||||
go func(conn net.Conn) {
|
||||
ssh.NewServerConn(conn, config)
|
||||
conn.Close()
|
||||
}(conn)
|
||||
}
|
||||
|
||||
}
|
||||
@ -0,0 +1,7 @@
|
||||
package net
|
||||
|
||||
import "testing"
|
||||
|
||||
func TestSSHJar(t *testing.T) {
|
||||
//runSSHHoneyJar("0.0.0.0:22")
|
||||
}
|
||||
@ -0,0 +1,246 @@
|
||||
package net
|
||||
|
||||
import (
|
||||
"b612.me/stario"
|
||||
"b612.me/starlog"
|
||||
"context"
|
||||
"encoding/hex"
|
||||
"fmt"
|
||||
"net"
|
||||
"os"
|
||||
"path/filepath"
|
||||
"runtime"
|
||||
"strings"
|
||||
"time"
|
||||
)
|
||||
|
||||
type TcpClient struct {
|
||||
LocalAddr string
|
||||
RemoteAddr string
|
||||
UsingKeepAlive bool
|
||||
KeepAlivePeriod int
|
||||
KeepAliveIdel int
|
||||
KeepAliveCount int
|
||||
Interactive bool
|
||||
UserTimeout int
|
||||
ShowRecv bool
|
||||
ShowAsHex bool
|
||||
SaveToFolder string
|
||||
Rmt *TcpConn
|
||||
LogPath string
|
||||
stopCtx context.Context
|
||||
stopFn context.CancelFunc
|
||||
}
|
||||
|
||||
func (s *TcpClient) Close() error {
|
||||
return s.Rmt.Close()
|
||||
}
|
||||
|
||||
func (s *TcpClient) handleInteractive() {
|
||||
var currentCmd string
|
||||
notifyMap := make(map[string]chan struct{})
|
||||
if !s.Interactive {
|
||||
return
|
||||
}
|
||||
starlog.Infoln("Interactive mode enabled")
|
||||
for {
|
||||
select {
|
||||
case <-s.stopCtx.Done():
|
||||
starlog.Infoln("Interactive mode stopped due to context done")
|
||||
return
|
||||
default:
|
||||
}
|
||||
cmd := stario.MessageBox("", "").MustString()
|
||||
if cmd == "" {
|
||||
continue
|
||||
}
|
||||
cmdf := strings.Fields(cmd)
|
||||
switch cmdf[0] {
|
||||
case "hex":
|
||||
currentCmd = "hex"
|
||||
starlog.Infoln("Switch to hex mode,send hex to remote client")
|
||||
case "text":
|
||||
currentCmd = "text"
|
||||
starlog.Infoln("Switch to text mode,send text to remote client")
|
||||
case "close":
|
||||
if s.Rmt.TCPConn == nil {
|
||||
starlog.Errorln("No client selected")
|
||||
continue
|
||||
}
|
||||
s.Rmt.TCPConn.Close()
|
||||
starlog.Infof("Client %s closed\n", s.Rmt.RemoteAddr().String())
|
||||
s.Rmt = nil
|
||||
currentCmd = ""
|
||||
case "startauto":
|
||||
if s.Rmt == nil {
|
||||
starlog.Errorln("No client selected")
|
||||
continue
|
||||
}
|
||||
notifyMap[s.Rmt.RemoteAddr().String()] = make(chan struct{})
|
||||
go func(conn *TcpConn) {
|
||||
for {
|
||||
select {
|
||||
case <-notifyMap[conn.RemoteAddr().String()]:
|
||||
starlog.Infoln("Auto send stopped")
|
||||
return
|
||||
default:
|
||||
}
|
||||
_, err := conn.Write([]byte(strings.Repeat("B612", 256)))
|
||||
if err != nil {
|
||||
starlog.Errorln("Write error:", err)
|
||||
return
|
||||
}
|
||||
}
|
||||
}(s.Rmt)
|
||||
starlog.Infoln("Auto send started")
|
||||
case "closeauto":
|
||||
if s.Rmt == nil {
|
||||
starlog.Errorln("No client selected")
|
||||
continue
|
||||
}
|
||||
close(notifyMap[s.Rmt.RemoteAddr().String()])
|
||||
case "send":
|
||||
if s.Rmt == nil {
|
||||
starlog.Errorln("No client selected")
|
||||
continue
|
||||
}
|
||||
if currentCmd == "hex" {
|
||||
data, err := hex.DecodeString(strings.TrimSpace(strings.TrimPrefix(cmd, "send")))
|
||||
if err != nil {
|
||||
starlog.Errorln("Hex decode error:", err)
|
||||
continue
|
||||
}
|
||||
_, err = s.Rmt.Write(data)
|
||||
if err != nil {
|
||||
starlog.Errorln("Write error:", err)
|
||||
} else {
|
||||
if s.Rmt.f != nil {
|
||||
s.Rmt.f.Write([]byte(time.Now().String() + " send\n"))
|
||||
s.Rmt.f.Write(data)
|
||||
s.Rmt.f.Write([]byte("\n"))
|
||||
}
|
||||
}
|
||||
} else {
|
||||
_, err := s.Rmt.Write([]byte(strings.TrimSpace(strings.TrimPrefix(cmd, "send"))))
|
||||
if err != nil {
|
||||
starlog.Errorln("Write error:", err)
|
||||
} else {
|
||||
if s.Rmt.f != nil {
|
||||
s.Rmt.f.Write([]byte(time.Now().String() + " send\n"))
|
||||
s.Rmt.f.Write([]byte(cmdf[1]))
|
||||
s.Rmt.f.Write([]byte("\n"))
|
||||
}
|
||||
}
|
||||
}
|
||||
starlog.Infof("Send to %s success\n", s.Rmt.RemoteAddr().String())
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (s *TcpClient) Run() error {
|
||||
var err error
|
||||
s.stopCtx, s.stopFn = context.WithCancel(context.Background())
|
||||
if s.LogPath != "" {
|
||||
err := starlog.SetLogFile(s.LogPath, starlog.Std, true)
|
||||
if err != nil {
|
||||
starlog.Errorln("SetLogFile error:", err)
|
||||
return fmt.Errorf("SetLogFile error: %w", err)
|
||||
}
|
||||
}
|
||||
var localAddr *net.TCPAddr
|
||||
if s.LocalAddr != "" {
|
||||
localAddr, err = net.ResolveTCPAddr("tcp", s.LocalAddr)
|
||||
if err != nil {
|
||||
starlog.Errorln("ResolveTCPAddr error:", err)
|
||||
return fmt.Errorf("ResolveTCPAddr error: %w", err)
|
||||
}
|
||||
}
|
||||
remoteAddr, err := net.ResolveTCPAddr("tcp", s.RemoteAddr)
|
||||
if err != nil {
|
||||
starlog.Errorln("ResolveTCPAddr error:", err)
|
||||
return fmt.Errorf("ResolveTCPAddr error: %w", err)
|
||||
}
|
||||
|
||||
conn, err := net.DialTCP("tcp", localAddr, remoteAddr)
|
||||
if err != nil {
|
||||
starlog.Errorln("Dial TCP error:", err)
|
||||
return fmt.Errorf("Dial TCP error: %w", err)
|
||||
}
|
||||
starlog.Infof("Connected to %s LocalAddr: %s\n", conn.RemoteAddr().String(), conn.LocalAddr().String())
|
||||
if s.Interactive {
|
||||
go s.handleInteractive()
|
||||
}
|
||||
s.Rmt = s.getTcpConn(conn)
|
||||
|
||||
s.handleConn(s.Rmt)
|
||||
return nil
|
||||
}
|
||||
|
||||
func (s *TcpClient) getTcpConn(conn *net.TCPConn) *TcpConn {
|
||||
var err error
|
||||
var f *os.File
|
||||
if s.SaveToFolder != "" {
|
||||
f, err = os.Create(filepath.Join(s.SaveToFolder, strings.ReplaceAll(conn.RemoteAddr().String(), ":", "_")))
|
||||
if err != nil {
|
||||
starlog.Errorf("Create file error for %s: %v\n", conn.RemoteAddr().String(), err)
|
||||
}
|
||||
}
|
||||
return &TcpConn{
|
||||
TCPConn: conn,
|
||||
f: f,
|
||||
}
|
||||
}
|
||||
|
||||
func (s *TcpClient) handleConn(conn *TcpConn) {
|
||||
var err error
|
||||
log := starlog.Std.NewFlag()
|
||||
err = SetTcpInfo(conn.TCPConn, s.UsingKeepAlive, s.KeepAliveIdel, s.KeepAlivePeriod, s.KeepAliveCount, s.UserTimeout)
|
||||
if err != nil {
|
||||
log.Errorf("SetTcpInfo error for %s: %v\n", conn.RemoteAddr().String(), err)
|
||||
conn.Close()
|
||||
return
|
||||
}
|
||||
log.Infof("SetKeepAlive success for %s\n", conn.RemoteAddr().String())
|
||||
log.Infof("KeepAlivePeriod: %d, KeepAliveIdel: %d, KeepAliveCount: %d, UserTimeout: %d\n", s.KeepAlivePeriod, s.KeepAliveIdel, s.KeepAliveCount, s.UserTimeout)
|
||||
if runtime.GOOS != "linux" {
|
||||
log.Warningln("keepAliveCount and userTimeout only work on linux")
|
||||
}
|
||||
|
||||
for {
|
||||
select {
|
||||
case <-s.stopCtx.Done():
|
||||
log.Infof("Connection from %s closed due to context done\n", conn.RemoteAddr().String())
|
||||
conn.Close()
|
||||
return
|
||||
default:
|
||||
}
|
||||
buf := make([]byte, 8192)
|
||||
n, err := conn.Read(buf)
|
||||
if err != nil {
|
||||
log.Errorf("Read error for %s: %v\n", conn.RemoteAddr().String(), err)
|
||||
conn.Close()
|
||||
return
|
||||
}
|
||||
if n > 0 {
|
||||
if s.ShowRecv {
|
||||
if s.ShowAsHex {
|
||||
log.Printf("Recv from %s: %x\n", conn.RemoteAddr().String(), buf[:n])
|
||||
} else {
|
||||
log.Printf("Recv from %s: %s\n", conn.RemoteAddr().String(), string(buf[:n]))
|
||||
}
|
||||
}
|
||||
if conn.f != nil {
|
||||
conn.f.Write([]byte(time.Now().String() + " recv\n"))
|
||||
conn.f.Write(buf[:n])
|
||||
conn.f.Write([]byte("\n"))
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (s *TcpClient) Stop() {
|
||||
s.stopFn()
|
||||
if s.Rmt != nil {
|
||||
s.Rmt.Close()
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,285 @@
|
||||
package net
|
||||
|
||||
import (
|
||||
"b612.me/stario"
|
||||
"b612.me/starlog"
|
||||
"context"
|
||||
"encoding/hex"
|
||||
"fmt"
|
||||
"net"
|
||||
"os"
|
||||
"path/filepath"
|
||||
"runtime"
|
||||
"strings"
|
||||
"sync"
|
||||
"time"
|
||||
)
|
||||
|
||||
type TcpConn struct {
|
||||
*net.TCPConn
|
||||
f *os.File
|
||||
}
|
||||
|
||||
type TcpServer struct {
|
||||
LocalAddr string
|
||||
UsingKeepAlive bool
|
||||
KeepAlivePeriod int
|
||||
KeepAliveIdel int
|
||||
KeepAliveCount int
|
||||
sync.Mutex
|
||||
Clients map[string]*TcpConn
|
||||
Interactive bool
|
||||
UserTimeout int
|
||||
ShowRecv bool
|
||||
ShowAsHex bool
|
||||
SaveToFolder string
|
||||
Listen *net.TCPListener
|
||||
LogPath string
|
||||
stopCtx context.Context
|
||||
stopFn context.CancelFunc
|
||||
}
|
||||
|
||||
func (s *TcpServer) Close() error {
|
||||
return s.Listen.Close()
|
||||
}
|
||||
|
||||
func (s *TcpServer) handleInteractive() {
|
||||
var conn *TcpConn
|
||||
var currentCmd string
|
||||
notifyMap := make(map[string]chan struct{})
|
||||
if !s.Interactive {
|
||||
return
|
||||
}
|
||||
starlog.Infoln("Interactive mode enabled")
|
||||
for {
|
||||
select {
|
||||
case <-s.stopCtx.Done():
|
||||
starlog.Infoln("Interactive mode stopped due to context done")
|
||||
return
|
||||
default:
|
||||
}
|
||||
cmd := stario.MessageBox("", "").MustString()
|
||||
if cmd == "" {
|
||||
continue
|
||||
}
|
||||
cmdf := strings.Fields(cmd)
|
||||
switch cmdf[0] {
|
||||
case "list":
|
||||
s.Lock()
|
||||
for k, v := range s.Clients {
|
||||
starlog.Green("Client %s: %s\n", k, v.RemoteAddr().String())
|
||||
}
|
||||
s.Unlock()
|
||||
case "use":
|
||||
if len(cmdf) < 2 {
|
||||
starlog.Errorln("use command need a client address")
|
||||
continue
|
||||
}
|
||||
conn = s.Clients[cmdf[1]]
|
||||
if conn == nil {
|
||||
starlog.Errorln("Client not found")
|
||||
continue
|
||||
}
|
||||
starlog.Infof("Using client %s\n", conn.RemoteAddr().String())
|
||||
case "hex":
|
||||
currentCmd = "hex"
|
||||
starlog.Infoln("Switch to hex mode,send hex to remote client")
|
||||
case "text":
|
||||
currentCmd = "text"
|
||||
starlog.Infoln("Switch to text mode,send text to remote client")
|
||||
case "close":
|
||||
if conn.TCPConn == nil {
|
||||
starlog.Errorln("No client selected")
|
||||
continue
|
||||
}
|
||||
conn.TCPConn.Close()
|
||||
starlog.Infof("Client %s closed\n", conn.RemoteAddr().String())
|
||||
conn = nil
|
||||
currentCmd = ""
|
||||
case "startauto":
|
||||
if conn == nil {
|
||||
starlog.Errorln("No client selected")
|
||||
continue
|
||||
}
|
||||
notifyMap[conn.RemoteAddr().String()] = make(chan struct{})
|
||||
go func(conn *TcpConn) {
|
||||
for {
|
||||
select {
|
||||
case <-notifyMap[conn.RemoteAddr().String()]:
|
||||
starlog.Infoln("Auto send stopped")
|
||||
return
|
||||
default:
|
||||
}
|
||||
_, err := conn.Write([]byte(strings.Repeat("B612", 256)))
|
||||
if err != nil {
|
||||
starlog.Errorln("Write error:", err)
|
||||
return
|
||||
}
|
||||
}
|
||||
}(conn)
|
||||
starlog.Infoln("Auto send started")
|
||||
case "closeauto":
|
||||
if conn == nil {
|
||||
starlog.Errorln("No client selected")
|
||||
continue
|
||||
}
|
||||
close(notifyMap[conn.RemoteAddr().String()])
|
||||
case "send":
|
||||
if conn == nil {
|
||||
starlog.Errorln("No client selected")
|
||||
continue
|
||||
}
|
||||
if currentCmd == "hex" {
|
||||
data, err := hex.DecodeString(strings.TrimSpace(strings.TrimPrefix(cmd, "send")))
|
||||
if err != nil {
|
||||
starlog.Errorln("Hex decode error:", err)
|
||||
continue
|
||||
}
|
||||
_, err = conn.Write(data)
|
||||
if err != nil {
|
||||
starlog.Errorln("Write error:", err)
|
||||
} else {
|
||||
if conn.f != nil {
|
||||
conn.f.Write([]byte(time.Now().String() + " send\n"))
|
||||
conn.f.Write(data)
|
||||
conn.f.Write([]byte("\n"))
|
||||
}
|
||||
}
|
||||
} else {
|
||||
_, err := conn.Write([]byte(strings.TrimSpace(strings.TrimPrefix(cmd, "send"))))
|
||||
if err != nil {
|
||||
starlog.Errorln("Write error:", err)
|
||||
} else {
|
||||
if conn.f != nil {
|
||||
conn.f.Write([]byte(time.Now().String() + " send\n"))
|
||||
conn.f.Write([]byte(cmdf[1]))
|
||||
conn.f.Write([]byte("\n"))
|
||||
}
|
||||
}
|
||||
}
|
||||
starlog.Infof("Send to %s success\n", conn.RemoteAddr().String())
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (s *TcpServer) Run() error {
|
||||
s.stopCtx, s.stopFn = context.WithCancel(context.Background())
|
||||
if s.LogPath != "" {
|
||||
err := starlog.SetLogFile(s.LogPath, starlog.Std, true)
|
||||
if err != nil {
|
||||
starlog.Errorln("SetLogFile error:", err)
|
||||
return fmt.Errorf("SetLogFile error: %w", err)
|
||||
}
|
||||
}
|
||||
s.Clients = make(map[string]*TcpConn)
|
||||
tcpAddr, err := net.ResolveTCPAddr("tcp", s.LocalAddr)
|
||||
if err != nil {
|
||||
starlog.Errorln("ResolveTCPAddr error:", err)
|
||||
return fmt.Errorf("ResolveTCPAddr error: %w", err)
|
||||
}
|
||||
s.Listen, err = net.ListenTCP("tcp", tcpAddr)
|
||||
if err != nil {
|
||||
starlog.Errorln("ListenTCP error:", err)
|
||||
return fmt.Errorf("ListenTCP error: %w", err)
|
||||
}
|
||||
starlog.Infof("TcpServer listen on %s\n", s.LocalAddr)
|
||||
if s.Interactive {
|
||||
go s.handleInteractive()
|
||||
}
|
||||
for {
|
||||
select {
|
||||
case <-s.stopCtx.Done():
|
||||
starlog.Infoln("TcpServer stopped due to context done")
|
||||
return s.Listen.Close()
|
||||
default:
|
||||
}
|
||||
conn, err := s.Listen.AcceptTCP()
|
||||
if err != nil {
|
||||
starlog.Errorln("AcceptTCP error:", err)
|
||||
continue
|
||||
}
|
||||
starlog.Infof("Accept new connection from %s", conn.RemoteAddr().String())
|
||||
s.Lock()
|
||||
s.Clients[conn.RemoteAddr().String()] = s.getTcpConn(conn)
|
||||
s.Unlock()
|
||||
go s.handleConn(s.Clients[conn.RemoteAddr().String()])
|
||||
}
|
||||
}
|
||||
|
||||
func (s *TcpServer) getTcpConn(conn *net.TCPConn) *TcpConn {
|
||||
var err error
|
||||
var f *os.File
|
||||
if s.SaveToFolder != "" {
|
||||
f, err = os.Create(filepath.Join(s.SaveToFolder, strings.ReplaceAll(conn.RemoteAddr().String(), ":", "_")))
|
||||
if err != nil {
|
||||
starlog.Errorf("Create file error for %s: %v\n", conn.RemoteAddr().String(), err)
|
||||
}
|
||||
}
|
||||
return &TcpConn{
|
||||
TCPConn: conn,
|
||||
f: f,
|
||||
}
|
||||
}
|
||||
|
||||
func (s *TcpServer) handleConn(conn *TcpConn) {
|
||||
var err error
|
||||
log := starlog.Std.NewFlag()
|
||||
err = SetTcpInfo(conn.TCPConn, s.UsingKeepAlive, s.KeepAliveIdel, s.KeepAlivePeriod, s.KeepAliveCount, s.UserTimeout)
|
||||
if err != nil {
|
||||
log.Errorf("SetTcpInfo error for %s: %v\n", conn.RemoteAddr().String(), err)
|
||||
s.Lock()
|
||||
delete(s.Clients, conn.RemoteAddr().String())
|
||||
s.Unlock()
|
||||
conn.Close()
|
||||
return
|
||||
}
|
||||
log.Infof("SetKeepAlive success for %s\n", conn.RemoteAddr().String())
|
||||
log.Infof("KeepAlivePeriod: %d, KeepAliveIdel: %d, KeepAliveCount: %d, UserTimeout: %d\n", s.KeepAlivePeriod, s.KeepAliveIdel, s.KeepAliveCount, s.UserTimeout)
|
||||
if runtime.GOOS != "linux" {
|
||||
log.Warningln("keepAliveCount and userTimeout only work on linux")
|
||||
}
|
||||
|
||||
for {
|
||||
select {
|
||||
case <-s.stopCtx.Done():
|
||||
log.Infof("Connection from %s closed due to context done\n", conn.RemoteAddr().String())
|
||||
s.Lock()
|
||||
delete(s.Clients, conn.RemoteAddr().String())
|
||||
s.Unlock()
|
||||
conn.Close()
|
||||
return
|
||||
default:
|
||||
}
|
||||
buf := make([]byte, 8192)
|
||||
n, err := conn.Read(buf)
|
||||
if err != nil {
|
||||
log.Errorf("Read error for %s: %v\n", conn.RemoteAddr().String(), err)
|
||||
s.Lock()
|
||||
delete(s.Clients, conn.RemoteAddr().String())
|
||||
s.Unlock()
|
||||
conn.Close()
|
||||
return
|
||||
}
|
||||
if n > 0 {
|
||||
if s.ShowRecv {
|
||||
if s.ShowAsHex {
|
||||
log.Printf("Recv from %s: %x\n", conn.RemoteAddr().String(), buf[:n])
|
||||
} else {
|
||||
log.Printf("Recv from %s: %s\n", conn.RemoteAddr().String(), string(buf[:n]))
|
||||
}
|
||||
}
|
||||
if conn.f != nil {
|
||||
conn.f.Write([]byte(time.Now().String() + " recv\n"))
|
||||
conn.f.Write(buf[:n])
|
||||
conn.f.Write([]byte("\n"))
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (s *TcpServer) Stop() {
|
||||
s.stopFn()
|
||||
if s.Listen != nil {
|
||||
s.Close()
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,35 @@
|
||||
//go:build darwin
|
||||
|
||||
package netforward
|
||||
|
||||
import (
|
||||
"net"
|
||||
"syscall"
|
||||
)
|
||||
|
||||
func SetTcpInfo(conn *net.TCPConn, usingKeepAlive bool, keepAliveIdel, keepAlivePeriod, keepAliveCount, userTimeout int) error {
|
||||
rawConn, err := conn.SyscallConn()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if usingKeepAlive {
|
||||
err = rawConn.Control(func(fd uintptr) {
|
||||
err = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_KEEPALIVE, keepAliveIdel)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
err = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, 0x101, keepAlivePeriod)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
})
|
||||
} else {
|
||||
err = conn.SetKeepAlive(false)
|
||||
}
|
||||
if userTimeout > 0 {
|
||||
err = rawConn.Control(func(fd uintptr) {
|
||||
err = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, 0x12, userTimeout)
|
||||
})
|
||||
}
|
||||
return err
|
||||
}
|
||||
@ -0,0 +1,39 @@
|
||||
//go:build !(windows && darwin)
|
||||
|
||||
package netforward
|
||||
|
||||
import (
|
||||
"net"
|
||||
"syscall"
|
||||
)
|
||||
|
||||
func SetTcpInfo(conn *net.TCPConn, usingKeepAlive bool, keepAliveIdel, keepAlivePeriod, keepAliveCount, userTimeout int) error {
|
||||
rawConn, err := conn.SyscallConn()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if usingKeepAlive {
|
||||
err = rawConn.Control(func(fd uintptr) {
|
||||
err = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_KEEPIDLE, keepAliveIdel)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
err = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_KEEPINTVL, keepAlivePeriod)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
err = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_KEEPCNT, keepAliveCount)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
})
|
||||
} else {
|
||||
err = conn.SetKeepAlive(false)
|
||||
}
|
||||
if userTimeout > 0 {
|
||||
err = rawConn.Control(func(fd uintptr) {
|
||||
err = syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, 0x12, userTimeout)
|
||||
})
|
||||
}
|
||||
return err
|
||||
}
|
||||
@ -0,0 +1,33 @@
|
||||
//go:build windows
|
||||
|
||||
package netforward
|
||||
|
||||
import (
|
||||
"net"
|
||||
"os"
|
||||
"runtime"
|
||||
"syscall"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
func SetTcpInfo(conn *net.TCPConn, usingKeepAlive bool, keepAliveIdel, keepAlivePeriod, keepAliveCount, userTimeout int) error {
|
||||
if usingKeepAlive {
|
||||
rawConn, err := conn.SyscallConn()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
err = rawConn.Control(func(fd uintptr) {
|
||||
ka := syscall.TCPKeepalive{
|
||||
OnOff: 1,
|
||||
Time: uint32(keepAliveIdel),
|
||||
Interval: uint32(keepAlivePeriod),
|
||||
}
|
||||
ret := uint32(0)
|
||||
size := uint32(unsafe.Sizeof(ka))
|
||||
err = syscall.WSAIoctl(syscall.Handle(fd), syscall.SIO_KEEPALIVE_VALS, (*byte)(unsafe.Pointer(&ka)), size, nil, 0, &ret, nil, 0)
|
||||
runtime.KeepAlive(fd)
|
||||
})
|
||||
return os.NewSyscallError("wsaioctl", err)
|
||||
}
|
||||
return conn.SetKeepAlive(false)
|
||||
}
|
||||
Loading…
Reference in New Issue