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Fixed ssh_scp_write so it works when doing recursive copy

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There where two issues with ssh_scp_write:
1) It did not write a status message after the last write and OpenSSH
   would then give up after the write finished.
2) OpenSSH would sometimes write a status message, after near ends write.
   If scp_write didn't handle it, and subsequent status message. The remote
   window would shrink to zero and ssh_channel_write would start returning 0.

Signed-off-by: Einar Floystad Dorum <einarfd@mailthief.com>
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
This commit is contained in:
Einar Floystad Dorum
2011-08-04 20:53:57 +02:00
committed by Andreas Schneider
parent 35686b4822
commit 01c4b713dc
1 changed files with 19 additions and 11 deletions
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30
src/scp.c
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@ -405,8 +405,8 @@ int ssh_scp_response(ssh_scp scp, char **response){
*/
int ssh_scp_write(ssh_scp scp, const void *buffer, size_t len){
int w;
//int r;
//uint8_t code;
int r;
uint8_t code;
if(scp==NULL)
return SSH_ERROR;
if(scp->state != SSH_SCP_WRITE_WRITING){
@ -425,19 +425,27 @@ int ssh_scp_write(ssh_scp scp, const void *buffer, size_t len){
//return=channel_get_exit_status(scp->channel);
return SSH_ERROR;
}
/* Far end sometimes send a status message, which we need to read
* and handle */
r = ssh_channel_poll(scp->channel,0);
if(r > 0){
r = ssh_channel_read(scp->channel, &code, 1, 0);
if(r == SSH_ERROR){
return SSH_ERROR;
}
if(code == 1 || code == 2){
ssh_set_error(scp->session,SSH_REQUEST_DENIED, "SCP: Error: status code %i received", code);
return SSH_ERROR;
}
}
/* Check if we arrived at end of file */
if(scp->processed == scp->filelen) {
/* r=channel_read(scp->channel,&code,1,0);
if(r==SSH_ERROR){
scp->state=SSH_SCP_ERROR;
code = 0;
w = ssh_channel_write(scp->channel, &code, 1);
if(w == SSH_ERROR){
scp->state = SSH_SCP_ERROR;
return SSH_ERROR;
}
if(code != 0){
ssh_set_error(scp->session,SSH_FATAL, "scp status code %ud not valid", code);
scp->state=SSH_SCP_ERROR;
return SSH_ERROR;
}
*/
scp->processed=scp->filelen=0;
scp->state=SSH_SCP_WRITE_INITED;
}