X-Git-Url: http://www.git.cypherpunks.ru/?a=blobdiff_plain;f=src%2Fcypherpunks.ru%2Fnncp%2Fcmd%2Fnncp-pkt%2Fmain.go;h=bdb18ad0d6ff94b6c41be187b06cb888ef275185;hb=dd92823db3d72fb21a4c712a7fb052dce16443dd;hp=ff77eb45195ac188be4a0872aeaa5ddb3768ca47;hpb=febf067a4f2c09c465190d1ddd2839ffc2c2405a;p=nncp.git

diff --git a/src/cypherpunks.ru/nncp/cmd/nncp-pkt/main.go b/src/cypherpunks.ru/nncp/cmd/nncp-pkt/main.go
index ff77eb4..bdb18ad 100644
--- a/src/cypherpunks.ru/nncp/cmd/nncp-pkt/main.go
+++ b/src/cypherpunks.ru/nncp/cmd/nncp-pkt/main.go
@@ -1,11 +1,10 @@
 /*
 NNCP -- Node to Node copy, utilities for store-and-forward data exchange
-Copyright (C) 2016-2018 Sergey Matveev <stargrave@stargrave.org>
+Copyright (C) 2016-2019 Sergey Matveev <stargrave@stargrave.org>
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
+the Free Software Foundation, version 3 of the License.
 
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -16,7 +15,7 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-// Parse raw NNCP packet
+// Parse raw NNCP packet.
 package main
 
 import (
@@ -31,7 +30,6 @@ import (
 
 	"cypherpunks.ru/nncp"
 	"github.com/davecgh/go-xdr/xdr2"
-	"golang.org/x/crypto/blake2b"
 )
 
 func usage() {
@@ -44,6 +42,7 @@ func usage() {
 
 func main() {
 	var (
+		overheads  = flag.Bool("overheads", false, "Print packet overheads")
 		dump       = flag.Bool("dump", false, "Write decrypted/parsed payload to stdout")
 		decompress = flag.Bool("decompress", false, "Try to zlib decompress dumped data")
 		cfgPath    = flag.String("cfg", nncp.DefaultCfgPath, "Path to configuration file")
@@ -61,8 +60,18 @@ func main() {
 		return
 	}
 
+	if *overheads {
+		fmt.Printf(
+			"Plain: %d\nEncrypted: %d\nSize: %d\n",
+			nncp.PktOverhead,
+			nncp.PktEncOverhead,
+			nncp.PktSizeOverhead,
+		)
+		return
+	}
+
 	var err error
-	beginning := make([]byte, nncp.PktOverhead-8-2*blake2b.Size256)
+	beginning := make([]byte, nncp.PktOverhead)
 	if _, err = io.ReadFull(os.Stdin, beginning); err != nil {
 		log.Fatalln("Not enough data to read")
 	}
@@ -121,7 +130,7 @@ func main() {
 	}
 	var pktEnc nncp.PktEnc
 	_, err = xdr.Unmarshal(bytes.NewReader(beginning), &pktEnc)
-	if err == nil && pktEnc.Magic == nncp.MagicNNCPEv3 {
+	if err == nil && pktEnc.Magic == nncp.MagicNNCPEv4 {
 		if *dump {
 			ctx, err := nncp.CtxFromCmdline(*cfgPath, "", "", false, false)
 			if err != nil {