Merge pull request #16 from CwithW/fix-dockerfile-missing-iproute2

fix: install iproute2 in runtime image

Dockerfile

@@ -36,7 +36,7 @@ RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build \
 
 # ---- Stage 3: minimal runtime ----
 FROM alpine:3.20
-RUN apk add --no-cache ca-certificates ccid pcsc-lite tzdata && \
+RUN apk add --no-cache ca-certificates ccid iproute2 pcsc-lite tzdata && \
     addgroup -S -g 1000 vocat && \
     adduser -S -D -H -u 1000 -G vocat vocat
 

internal/server/telegram_bot.go

@@ -2328,6 +2328,11 @@ func (bot *telegramBot) loadConfig(ctx context.Context) (telegramRuntimeConfig,
 }
 
 func (bot *telegramBot) call(ctx context.Context, config telegramRuntimeConfig, method string, payload any, result any) error {
+	// Telegram polling is a long-lived notification channel and must use the
+	// same administrator-configured destination exceptions as test messages,
+	// SMS pushes and automatic-task notifications. This keeps SSRF protection
+	// enabled while allowing explicit DNS Fake-IP ranges such as 198.18/15.
+	ctx = bot.notificationDestinationContext(ctx)
 	base, err := validateTelegramAPIURL(ctx, config.BaseURL, config.Token, method)
 	if err != nil {
 		return redactTelegramError(err, config.Token)
@@ -2370,6 +2375,13 @@ func (bot *telegramBot) call(ctx context.Context, config telegramRuntimeConfig,
 	return nil
 }
 
+func (bot *telegramBot) notificationDestinationContext(ctx context.Context) context.Context {
+	if bot.server == nil {
+		return ctx
+	}
+	return bot.server.notificationDestinationContext(ctx)
+}
+
 func (bot *telegramBot) sendText(ctx context.Context, config telegramRuntimeConfig, chatID int64, text string, replyMarkup any) error {
 	target := config.ChatID
 	if chatID != 0 {

internal/server/telegram_bot_test.go

@@ -3,6 +3,7 @@ package server
 import (
 	"context"
 	"errors"
+	"net/netip"
 	"strings"
 	"testing"
 	"time"
@@ -57,6 +58,19 @@ func TestTelegramAPIURLRejectsMalformedTemplates(t *testing.T) {
 	}
 }
 
+func TestTelegramPollingUsesExplicitFakeIPDestinationAllowlist(t *testing.T) {
+	bot := &telegramBot{server: &Server{access: parsedAccessConfig{
+		cidrs: []netip.Prefix{netip.MustParsePrefix("198.18.0.0/15")},
+	}}}
+	ctx := bot.notificationDestinationContext(context.Background())
+	if _, err := validateTelegramAPIURL(ctx, "https://198.18.0.34", "123456:test-token", "getUpdates"); err != nil {
+		t.Fatalf("explicitly allowed Telegram Fake-IP was rejected: %v", err)
+	}
+	if _, err := validateTelegramAPIURL(ctx, "https://169.254.169.254", "123456:test-token", "getUpdates"); err == nil {
+		t.Fatal("metadata address became reachable through Telegram allowlist")
+	}
+}
+
 func TestParseTelegramCommand(t *testing.T) {
 	command, remainder := parseTelegramCommand("  /sms@vocat_bot EC20 +447700900123 hello world  ")
 	if command != "sms" || remainder != "EC20 +447700900123 hello world" {