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MHSanaei
d50c419e28
getRemoteIp took a trusted proxy's X-Real-IP first, otherwise the leftmost X-Forwarded-For entry. A proxy that forwards a client-sent X-Real-IP unchanged (Caddy, HAProxy) or appends to X-Forwarded-For leaves both values to the client. X-Forwarded-For is now read from the right, skipping trusted proxies. X-Real-IP is believed only when it agrees with that hop or stands alone, and a disagreement falls back to the proxy's own address. The documented Caddyfile and the docs reverse-proxy generator now overwrite X-Real-IP with the address Caddy saw.
91 lines
3.3 KiB
Go
91 lines
3.3 KiB
Go
package controller
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import (
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"net/http"
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"net/http/httptest"
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"testing"
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"github.com/gin-gonic/gin"
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)
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func TestGetRemoteIpIgnoresForwardedHeadersFromUntrustedRemote(t *testing.T) {
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gin.SetMode(gin.TestMode)
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c, _ := gin.CreateTestContext(httptest.NewRecorder())
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c.Request = httptest.NewRequest(http.MethodGet, "/", nil)
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c.Request.RemoteAddr = "203.0.113.10:12345"
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c.Request.Header.Set("X-Real-IP", "198.51.100.9")
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c.Request.Header.Set("X-Forwarded-For", "198.51.100.8")
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if got := getRemoteIp(c); got != "203.0.113.10" {
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t.Fatalf("remote IP = %q, want request remote address", got)
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}
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}
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func TestGetRemoteIpHonorsForwardedHeadersFromTrustedLoopbackProxy(t *testing.T) {
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gin.SetMode(gin.TestMode)
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c, _ := gin.CreateTestContext(httptest.NewRecorder())
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c.Request = httptest.NewRequest(http.MethodGet, "/", nil)
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c.Request.RemoteAddr = "127.0.0.1:12345"
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c.Request.Header.Set("X-Forwarded-For", "198.51.100.8, 127.0.0.1")
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if got := getRemoteIp(c); got != "198.51.100.8" {
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t.Fatalf("remote IP = %q, want forwarded client IP", got)
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}
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}
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// Caddy and HAProxy set X-Forwarded-For but pass the client's own X-Real-IP
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// through, so a client could pick its login-limiter bucket per request.
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func TestGetRemoteIpDistrustsRealIPThatContradictsForwardedFor(t *testing.T) {
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gin.SetMode(gin.TestMode)
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c, _ := gin.CreateTestContext(httptest.NewRecorder())
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c.Request = httptest.NewRequest(http.MethodGet, "/", nil)
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c.Request.RemoteAddr = "127.0.0.1:12345"
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c.Request.Header.Set("X-Forwarded-For", "203.0.113.5")
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c.Request.Header.Set("X-Real-IP", "198.51.100.1")
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if got := getRemoteIp(c); got != "127.0.0.1" {
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t.Fatalf("remote IP = %q, want the proxy address when the forwarded headers disagree", got)
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}
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}
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// An appending proxy keeps whatever X-Forwarded-For the client sent in front of
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// the address it saw, so only the hop next to the trusted proxies is real.
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func TestGetRemoteIpReadsForwardedForFromTheProxyEnd(t *testing.T) {
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gin.SetMode(gin.TestMode)
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c, _ := gin.CreateTestContext(httptest.NewRecorder())
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c.Request = httptest.NewRequest(http.MethodGet, "/", nil)
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c.Request.RemoteAddr = "127.0.0.1:12345"
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c.Request.Header.Set("X-Forwarded-For", "198.51.100.1, 203.0.113.5")
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if got := getRemoteIp(c); got != "203.0.113.5" {
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t.Fatalf("remote IP = %q, want the hop the trusted proxy appended", got)
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}
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}
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func TestResolveHostPrefersForwardedHostOverRealIP(t *testing.T) {
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gin.SetMode(gin.TestMode)
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c, _ := gin.CreateTestContext(httptest.NewRecorder())
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c.Request = httptest.NewRequest(http.MethodGet, "/", nil)
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c.Request.Host = "panel.example.com:2053"
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c.Request.RemoteAddr = "127.0.0.1:12345"
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c.Request.Header.Set("X-Forwarded-Host", "sub.example.net:443")
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c.Request.Header.Set("X-Real-IP", "198.51.100.7")
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if got := resolveHost(c); got != "sub.example.net" {
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t.Fatalf("resolveHost = %q, want X-Forwarded-Host", got)
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}
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}
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func TestResolveHostIgnoresRealIPFromTrustedProxy(t *testing.T) {
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gin.SetMode(gin.TestMode)
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c, _ := gin.CreateTestContext(httptest.NewRecorder())
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c.Request = httptest.NewRequest(http.MethodGet, "/", nil)
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c.Request.Host = "panel.example.com:2053"
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c.Request.RemoteAddr = "127.0.0.1:12345"
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c.Request.Header.Set("X-Real-IP", "198.51.100.7")
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if got := resolveHost(c); got != "panel.example.com" {
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t.Fatalf("resolveHost = %q, want request host (not X-Real-IP)", got)
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}
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}
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