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hkexcp: fixed copy chunked payload logic (now 2*32-1 MAX_PAYLOAD_LEN w/chunking)

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This commit is contained in:
Russ Magee 2018-09-02 19:58:13 -07:00
parent c842d36319
commit 7295492aa3
2 changed files with 18 additions and 11 deletions
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24
hkexnet/hkexnet.go
View file

@ -42,6 +42,8 @@ const (
CSOChaff // Dummy packet, do not pass beyond decryption
)
const MAX_PAYLOAD_LEN = 4*1024*1024*1024 - 1
/*---------------------------------------------------------------------*/
type (
@ -376,7 +378,7 @@ func (hc Conn) Read(b []byte) (n int, err error) {
// (on server side) err.Error() == "<iface/addr info ...>: use of closed network connection"
if err != nil {
if !strings.HasSuffix(err.Error(), "use of closed network connection") {
log.Println("unexpected Read() err:", err)
log.Println("[1]unexpected Read() err:", err)
} else {
log.Println("[Client hung up]")
}
@ -386,7 +388,7 @@ func (hc Conn) Read(b []byte) (n int, err error) {
err = binary.Read(hc.c, binary.BigEndian, &payloadLen)
if err != nil {
if err.Error() != "EOF" {
log.Println("unexpected Read() err:", err)
log.Println("[2]unexpected Read() err:", err)
//panic(err)
// Cannot just return 0, err here - client won't hang up properly
// when 'exit' from shell. TODO: try server sending ctrlStatOp to
@ -394,7 +396,7 @@ func (hc Conn) Read(b []byte) (n int, err error) {
}
}
if payloadLen > 8192 {
if payloadLen > MAX_PAYLOAD_LEN {
log.Printf("[Insane payloadLen:%v]\n", payloadLen)
hc.Close()
return 1, errors.New("Insane payloadLen")
@ -409,7 +411,7 @@ func (hc Conn) Read(b []byte) (n int, err error) {
// (on server side) err.Error() == "<iface/addr info ...>: use of closed network connection"
if err != nil && err.Error() != "EOF" {
if !strings.HasSuffix(err.Error(), "use of closed network connection") {
log.Println("unexpected Read() err:", err)
log.Println("[3]unexpected Read() err:", err)
} else {
log.Println("[Client hung up]")
}
@ -498,11 +500,15 @@ func (hc Conn) WritePacket(b []byte, op byte) (n int, err error) {
//
// Would be nice to determine if the mutex scope
// could be tightened.
hc.m.Lock()
for uint32(len(b)) > 0 {
hc.m.Lock()
fmt.Printf("--== TOTAL payloadLen (b):%d\n", len(b))
payloadLen = uint32(len(b))
if payloadLen > 8192 {
payloadLen = 8192
if payloadLen > MAX_PAYLOAD_LEN {
payloadLen = MAX_PAYLOAD_LEN
//fmt.Printf("--== payloadLen:%d\n", payloadLen)
} else {
//fmt.Printf("--== payloadLen:%d\n", payloadLen)
}
log.Printf(" :>ptext:\r\n%s\r\n", hex.Dump(b[0:payloadLen]))
@ -534,9 +540,11 @@ func (hc Conn) WritePacket(b []byte, op byte) (n int, err error) {
}
}
}
//Advance to next full (or final, partial) chunk of payload
b = b[payloadLen:]
}
hc.m.Unlock()
time.Sleep(200 * time.Millisecond)
}
if err != nil {
//panic(err)

3
hkexsh/hkexsh.go
View file

@ -114,7 +114,7 @@ func doCopyMode(conn *hkexnet.Conn, remoteDest bool, files string, rec *cmdSpec)
// changes to the dest dir *as it sees each one*. This enables
// its use below, where clients can send scattered sets of source
// files and dirs to be extracted to a single dest dir server-side,
// whilst preserving the subtrees of dirs on the other side. :)
// whilst preserving the subtrees of dirs on the other side.
// Eg., tar -c -f /dev/stdout -C /dirA fileInA -C /some/where/dirB fileInB /foo/dirC
// packages fileInA, fileInB, and dirC at a single toplevel in the tar.
// The tar authors are/were real smarties :)
@ -130,7 +130,6 @@ func doCopyMode(conn *hkexnet.Conn, remoteDest bool, files string, rec *cmdSpec)
} else {
cmdArgs = append(cmdArgs, "-C", dirTmp, fileTmp)
}
//cmdArgs = append(cmdArgs, v)
}