838 строки
24 KiB
C
838 строки
24 KiB
C
/*
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* scp - SSH scp wrapper functions
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*
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* This file is part of the SSH Library
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*
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* Copyright (c) 2009 by Aris Adamantiadis <aris@0xbadc0de.be>
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*
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* The SSH Library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or (at your
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* option) any later version.
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*
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* The SSH Library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with the SSH Library; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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* MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "libssh/priv.h"
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#include "libssh/scp.h"
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/**
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* @defgroup libssh_scp The SSH scp functions
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* @ingroup libssh
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*
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* SCP protocol over SSH functions
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*
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* @{
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*/
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/**
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* @brief Create a new scp session.
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*
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* @param[in] session The SSH session to use.
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*
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* @param[in] mode One of SSH_SCP_WRITE or SSH_SCP_READ, depending if you
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* need to drop files remotely or read them.
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* It is not possible to combine read and write.
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* SSH_SCP_RECURSIVE Flag can be or'ed to this to indicate
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* that you're going to use recursion. Browsing through
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* directories is not possible without this.
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*
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* @param[in] location The directory in which write or read will be done. Any
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* push or pull will be relative to this place.
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* This can also be a pattern of files to download (read).
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*
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* @returns A ssh_scp handle, NULL if the creation was impossible.
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*/
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ssh_scp ssh_scp_new(ssh_session session, int mode, const char *location){
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ssh_scp scp=malloc(sizeof(struct ssh_scp_struct));
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if(scp == NULL){
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ssh_set_error(session,SSH_FATAL,"Error allocating memory for ssh_scp");
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return NULL;
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}
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ZERO_STRUCTP(scp);
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if((mode&~SSH_SCP_RECURSIVE) != SSH_SCP_WRITE && (mode &~SSH_SCP_RECURSIVE) != SSH_SCP_READ){
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ssh_set_error(session,SSH_FATAL,"Invalid mode %d for ssh_scp_new()",mode);
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ssh_scp_free(scp);
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return NULL;
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}
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scp->location=strdup(location);
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if (scp->location == NULL) {
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ssh_set_error(session,SSH_FATAL,"Error allocating memory for ssh_scp");
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ssh_scp_free(scp);
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return NULL;
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}
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scp->session=session;
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scp->mode=mode & ~SSH_SCP_RECURSIVE;
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scp->recursive = (mode & SSH_SCP_RECURSIVE) != 0;
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scp->channel=NULL;
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scp->state=SSH_SCP_NEW;
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return scp;
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}
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/**
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* @brief Initialize the scp channel.
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*
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* @param[in] scp The scp context to initialize.
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*
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* @return SSH_OK on success or an SSH error code.
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*
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* @see ssh_scp_new()
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*/
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int ssh_scp_init(ssh_scp scp)
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{
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int r;
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char execbuffer[1024];
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uint8_t code;
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if(scp==NULL)
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return SSH_ERROR;
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if(scp->state != SSH_SCP_NEW){
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ssh_set_error(scp->session,SSH_FATAL,"ssh_scp_init called under invalid state");
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return SSH_ERROR;
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}
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SSH_LOG(SSH_LOG_PROTOCOL,"Initializing scp session %s %son location '%s'",
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scp->mode==SSH_SCP_WRITE?"write":"read",
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scp->recursive?"recursive ":"",
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scp->location);
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scp->channel=ssh_channel_new(scp->session);
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if(scp->channel == NULL){
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scp->state=SSH_SCP_ERROR;
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return SSH_ERROR;
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}
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r= ssh_channel_open_session(scp->channel);
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if(r==SSH_ERROR){
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scp->state=SSH_SCP_ERROR;
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return SSH_ERROR;
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}
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if(scp->mode == SSH_SCP_WRITE)
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snprintf(execbuffer,sizeof(execbuffer),"scp -t %s %s",
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scp->recursive ? "-r":"", scp->location);
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else
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snprintf(execbuffer,sizeof(execbuffer),"scp -f %s %s",
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scp->recursive ? "-r":"", scp->location);
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if(ssh_channel_request_exec(scp->channel,execbuffer) == SSH_ERROR){
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scp->state=SSH_SCP_ERROR;
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return SSH_ERROR;
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}
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if(scp->mode == SSH_SCP_WRITE){
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r=ssh_channel_read(scp->channel,&code,1,0);
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if(r<=0){
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ssh_set_error(scp->session,SSH_FATAL, "Error reading status code: %s",ssh_get_error(scp->session));
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scp->state=SSH_SCP_ERROR;
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return SSH_ERROR;
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}
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if(code != 0){
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ssh_set_error(scp->session,SSH_FATAL, "scp status code %ud not valid", code);
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scp->state=SSH_SCP_ERROR;
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return SSH_ERROR;
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}
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} else {
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ssh_channel_write(scp->channel,"",1);
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}
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if(scp->mode == SSH_SCP_WRITE)
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scp->state=SSH_SCP_WRITE_INITED;
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else
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scp->state=SSH_SCP_READ_INITED;
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return SSH_OK;
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}
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/**
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* @brief Close the scp channel.
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*
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* @param[in] scp The scp context to close.
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*
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* @return SSH_OK on success or an SSH error code.
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*
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* @see ssh_scp_init()
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*/
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int ssh_scp_close(ssh_scp scp)
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{
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char buffer[128];
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int err;
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if(scp==NULL)
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return SSH_ERROR;
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if(scp->channel != NULL){
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if(ssh_channel_send_eof(scp->channel) == SSH_ERROR){
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scp->state=SSH_SCP_ERROR;
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return SSH_ERROR;
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}
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/* avoid situations where data are buffered and
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* not yet stored on disk. This can happen if the close is sent
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* before we got the EOF back
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*/
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while(!ssh_channel_is_eof(scp->channel)){
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err=ssh_channel_read(scp->channel,buffer,sizeof(buffer),0);
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if(err==SSH_ERROR || err==0)
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break;
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}
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if(ssh_channel_close(scp->channel) == SSH_ERROR){
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scp->state=SSH_SCP_ERROR;
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return SSH_ERROR;
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}
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ssh_channel_free(scp->channel);
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scp->channel=NULL;
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}
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scp->state=SSH_SCP_NEW;
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return SSH_OK;
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}
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/**
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* @brief Free a scp context.
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*
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* @param[in] scp The context to free.
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*
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* @see ssh_scp_new()
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*/
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void ssh_scp_free(ssh_scp scp)
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{
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if(scp==NULL)
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return;
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if(scp->state != SSH_SCP_NEW)
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ssh_scp_close(scp);
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if(scp->channel)
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ssh_channel_free(scp->channel);
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SAFE_FREE(scp->location);
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SAFE_FREE(scp->request_name);
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SAFE_FREE(scp->warning);
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SAFE_FREE(scp);
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}
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/**
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* @brief Create a directory in a scp in sink mode.
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*
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* @param[in] scp The scp handle.
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*
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* @param[in] dirname The name of the directory being created.
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*
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* @param[in] mode The UNIX permissions for the new directory, e.g. 0755.
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*
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* @returns SSH_OK if the directory has been created, SSH_ERROR if
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* an error occured.
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*
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* @see ssh_scp_leave_directory()
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*/
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int ssh_scp_push_directory(ssh_scp scp, const char *dirname, int mode){
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char buffer[1024];
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int r;
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uint8_t code;
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char *dir;
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char *perms;
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if(scp==NULL)
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return SSH_ERROR;
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if(scp->state != SSH_SCP_WRITE_INITED){
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ssh_set_error(scp->session,SSH_FATAL,"ssh_scp_push_directory called under invalid state");
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return SSH_ERROR;
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}
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dir=ssh_basename(dirname);
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perms=ssh_scp_string_mode(mode);
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snprintf(buffer, sizeof(buffer), "D%s 0 %s\n", perms, dir);
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SAFE_FREE(dir);
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SAFE_FREE(perms);
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r=ssh_channel_write(scp->channel,buffer,strlen(buffer));
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if(r==SSH_ERROR){
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scp->state=SSH_SCP_ERROR;
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return SSH_ERROR;
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}
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r=ssh_channel_read(scp->channel,&code,1,0);
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if(r<=0){
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ssh_set_error(scp->session,SSH_FATAL, "Error reading status code: %s",ssh_get_error(scp->session));
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scp->state=SSH_SCP_ERROR;
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return SSH_ERROR;
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}
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if(code != 0){
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ssh_set_error(scp->session,SSH_FATAL, "scp status code %ud not valid", code);
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scp->state=SSH_SCP_ERROR;
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return SSH_ERROR;
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}
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return SSH_OK;
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}
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/**
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* @brief Leave a directory.
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*
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* @returns SSH_OK if the directory has been left,SSH_ERROR if an
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* error occured.
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*
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* @see ssh_scp_push_directory()
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*/
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int ssh_scp_leave_directory(ssh_scp scp){
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char buffer[]="E\n";
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int r;
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uint8_t code;
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if(scp==NULL)
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return SSH_ERROR;
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if(scp->state != SSH_SCP_WRITE_INITED){
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ssh_set_error(scp->session,SSH_FATAL,"ssh_scp_leave_directory called under invalid state");
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return SSH_ERROR;
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}
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r=ssh_channel_write(scp->channel,buffer,strlen(buffer));
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if(r==SSH_ERROR){
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scp->state=SSH_SCP_ERROR;
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return SSH_ERROR;
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}
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r=ssh_channel_read(scp->channel,&code,1,0);
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if(r<=0){
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ssh_set_error(scp->session,SSH_FATAL, "Error reading status code: %s",ssh_get_error(scp->session));
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scp->state=SSH_SCP_ERROR;
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return SSH_ERROR;
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}
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if(code != 0){
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ssh_set_error(scp->session,SSH_FATAL, "scp status code %ud not valid", code);
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scp->state=SSH_SCP_ERROR;
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return SSH_ERROR;
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}
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return SSH_OK;
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}
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/**
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* @brief Initialize the sending of a file to a scp in sink mode, using a 64-bit size.
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*
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* @param[in] scp The scp handle.
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*
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* @param[in] filename The name of the file being sent. It should not contain
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* any path indicator
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*
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* @param[in] size Exact size in bytes of the file being sent.
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*
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* @param[in] mode The UNIX permissions for the new file, e.g. 0644.
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*
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* @returns SSH_OK if the file is ready to be sent, SSH_ERROR if an
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* error occured.
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*
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* @see ssh_scp_push_file()
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*/
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int ssh_scp_push_file64(ssh_scp scp, const char *filename, uint64_t size, int mode){
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char buffer[1024];
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int r;
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uint8_t code;
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char *file;
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char *perms;
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if(scp==NULL)
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return SSH_ERROR;
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if(scp->state != SSH_SCP_WRITE_INITED){
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ssh_set_error(scp->session,SSH_FATAL,"ssh_scp_push_file called under invalid state");
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return SSH_ERROR;
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}
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file=ssh_basename(filename);
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perms=ssh_scp_string_mode(mode);
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SSH_LOG(SSH_LOG_PROTOCOL,"SCP pushing file %s, size %" PRIu64 " with permissions '%s'",file,size,perms);
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snprintf(buffer, sizeof(buffer), "C%s %" PRIu64 " %s\n", perms, size, file);
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SAFE_FREE(file);
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SAFE_FREE(perms);
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r=ssh_channel_write(scp->channel,buffer,strlen(buffer));
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if(r==SSH_ERROR){
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scp->state=SSH_SCP_ERROR;
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return SSH_ERROR;
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}
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r=ssh_channel_read(scp->channel,&code,1,0);
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if(r<=0){
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ssh_set_error(scp->session,SSH_FATAL, "Error reading status code: %s",ssh_get_error(scp->session));
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scp->state=SSH_SCP_ERROR;
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return SSH_ERROR;
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}
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if(code != 0){
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ssh_set_error(scp->session,SSH_FATAL, "scp status code %ud not valid", code);
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scp->state=SSH_SCP_ERROR;
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return SSH_ERROR;
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}
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scp->filelen = size;
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scp->processed = 0;
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scp->state=SSH_SCP_WRITE_WRITING;
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return SSH_OK;
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}
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/**
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* @brief Initialize the sending of a file to a scp in sink mode.
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*
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* @param[in] scp The scp handle.
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*
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* @param[in] filename The name of the file being sent. It should not contain
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* any path indicator
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*
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* @param[in] size Exact size in bytes of the file being sent.
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*
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* @param[in] mode The UNIX permissions for the new file, e.g. 0644.
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*
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* @returns SSH_OK if the file is ready to be sent, SSH_ERROR if an
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* error occured.
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*/
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int ssh_scp_push_file(ssh_scp scp, const char *filename, size_t size, int mode){
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return ssh_scp_push_file64(scp, filename, (uint64_t) size, mode);
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}
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/**
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* @internal
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*
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* @brief Wait for a response of the scp server.
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*
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* @param[in] scp The scp handle.
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*
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* @param[out] response A pointer where the response message must be copied if
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* any. This pointer must then be free'd.
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*
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* @returns The return code, SSH_ERROR a error occured.
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*/
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int ssh_scp_response(ssh_scp scp, char **response){
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unsigned char code;
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int r;
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char msg[128];
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if(scp==NULL)
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return SSH_ERROR;
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r=ssh_channel_read(scp->channel,&code,1,0);
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if(r == SSH_ERROR)
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return SSH_ERROR;
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if(code == 0)
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return 0;
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if(code > 2){
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ssh_set_error(scp->session,SSH_FATAL, "SCP: invalid status code %ud received", code);
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scp->state=SSH_SCP_ERROR;
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return SSH_ERROR;
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}
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r=ssh_scp_read_string(scp,msg,sizeof(msg));
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if(r==SSH_ERROR)
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return r;
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/* Warning */
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if(code == 1){
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ssh_set_error(scp->session,SSH_REQUEST_DENIED, "SCP: Warning: status code 1 received: %s", msg);
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SSH_LOG(SSH_LOG_RARE,"SCP: Warning: status code 1 received: %s", msg);
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if(response)
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*response=strdup(msg);
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return 1;
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}
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if(code == 2){
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ssh_set_error(scp->session,SSH_FATAL, "SCP: Error: status code 2 received: %s", msg);
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if(response)
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*response=strdup(msg);
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return 2;
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}
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/* Not reached */
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return SSH_ERROR;
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}
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/**
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* @brief Write into a remote scp file.
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*
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* @param[in] scp The scp handle.
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*
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* @param[in] buffer The buffer to write.
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*
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* @param[in] len The number of bytes to write.
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*
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* @returns SSH_OK if the write was successful, SSH_ERROR an error
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* occured while writing.
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*/
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int ssh_scp_write(ssh_scp scp, const void *buffer, size_t len){
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int w;
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int r;
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uint8_t code;
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if(scp==NULL)
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return SSH_ERROR;
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if(scp->state != SSH_SCP_WRITE_WRITING){
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ssh_set_error(scp->session,SSH_FATAL,"ssh_scp_write called under invalid state");
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return SSH_ERROR;
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}
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if(scp->processed + len > scp->filelen)
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len = (size_t) (scp->filelen - scp->processed);
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/* hack to avoid waiting for window change */
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r = ssh_channel_poll(scp->channel, 0);
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if (r == SSH_ERROR) {
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scp->state = SSH_SCP_ERROR;
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return SSH_ERROR;
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}
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w=ssh_channel_write(scp->channel,buffer,len);
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if(w != SSH_ERROR)
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scp->processed += w;
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else {
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scp->state=SSH_SCP_ERROR;
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//return=channel_get_exit_status(scp->channel);
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return SSH_ERROR;
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}
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/* Far end sometimes send a status message, which we need to read
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* and handle */
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r = ssh_channel_poll(scp->channel,0);
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if(r > 0){
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r = ssh_channel_read(scp->channel, &code, 1, 0);
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if(r == SSH_ERROR){
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return SSH_ERROR;
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}
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if(code == 1 || code == 2){
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ssh_set_error(scp->session,SSH_REQUEST_DENIED, "SCP: Error: status code %i received", code);
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return SSH_ERROR;
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}
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}
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/* Check if we arrived at end of file */
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if(scp->processed == scp->filelen) {
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code = 0;
|
|
w = ssh_channel_write(scp->channel, &code, 1);
|
|
if(w == SSH_ERROR){
|
|
scp->state = SSH_SCP_ERROR;
|
|
return SSH_ERROR;
|
|
}
|
|
scp->processed=scp->filelen=0;
|
|
scp->state=SSH_SCP_WRITE_INITED;
|
|
}
|
|
return SSH_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief Read a string on a channel, terminated by '\n'
|
|
*
|
|
* @param[in] scp The scp handle.
|
|
*
|
|
* @param[out] buffer A pointer to a buffer to place the string.
|
|
*
|
|
* @param[in] len The size of the buffer in bytes. If the string is bigger
|
|
* than len-1, only len-1 bytes are read and the string is
|
|
* null-terminated.
|
|
*
|
|
* @returns SSH_OK if the string was read, SSH_ERROR if an error
|
|
* occured while reading.
|
|
*/
|
|
int ssh_scp_read_string(ssh_scp scp, char *buffer, size_t len){
|
|
size_t r=0;
|
|
int err=SSH_OK;
|
|
if(scp==NULL)
|
|
return SSH_ERROR;
|
|
while(r<len-1){
|
|
err=ssh_channel_read(scp->channel,&buffer[r],1,0);
|
|
if(err==SSH_ERROR){
|
|
break;
|
|
}
|
|
if(err==0){
|
|
ssh_set_error(scp->session,SSH_FATAL,"End of file while reading string");
|
|
err=SSH_ERROR;
|
|
break;
|
|
}
|
|
r++;
|
|
if(buffer[r-1] == '\n')
|
|
break;
|
|
}
|
|
buffer[r]=0;
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* @brief Wait for a scp request (file, directory).
|
|
*
|
|
* @returns SSH_SCP_REQUEST_NEWFILE: The other side is sending
|
|
* a file
|
|
* SSH_SCP_REQUEST_NEWDIR: The other side is sending
|
|
* a directory
|
|
* SSH_SCP_REQUEST_ENDDIR: The other side has
|
|
* finished with the current
|
|
* directory
|
|
* SSH_SCP_REQUEST_WARNING: The other side sent us a warning
|
|
* SSH_SCP_REQUEST_EOF: The other side finished sending us
|
|
* files and data.
|
|
* SSH_ERROR: Some error happened
|
|
*
|
|
* @see ssh_scp_read()
|
|
* @see ssh_scp_deny_request()
|
|
* @see ssh_scp_accept_request()
|
|
* @see ssh_scp_request_get_warning()
|
|
*/
|
|
int ssh_scp_pull_request(ssh_scp scp){
|
|
char buffer[4096] = {0};
|
|
char *mode=NULL;
|
|
char *p,*tmp;
|
|
uint64_t size;
|
|
char *name=NULL;
|
|
int err;
|
|
if(scp==NULL)
|
|
return SSH_ERROR;
|
|
if(scp->state != SSH_SCP_READ_INITED){
|
|
ssh_set_error(scp->session,SSH_FATAL,"ssh_scp_pull_request called under invalid state");
|
|
return SSH_ERROR;
|
|
}
|
|
err=ssh_scp_read_string(scp,buffer,sizeof(buffer));
|
|
if(err==SSH_ERROR){
|
|
if(ssh_channel_is_eof(scp->channel)){
|
|
scp->state=SSH_SCP_TERMINATED;
|
|
return SSH_SCP_REQUEST_EOF;
|
|
}
|
|
return err;
|
|
}
|
|
p=strchr(buffer,'\n');
|
|
if(p!=NULL)
|
|
*p='\0';
|
|
SSH_LOG(SSH_LOG_PROTOCOL,"Received SCP request: '%s'",buffer);
|
|
switch(buffer[0]){
|
|
case 'C':
|
|
/* File */
|
|
case 'D':
|
|
/* Directory */
|
|
p=strchr(buffer,' ');
|
|
if(p==NULL)
|
|
goto error;
|
|
*p='\0';
|
|
p++;
|
|
//mode=strdup(&buffer[1]);
|
|
scp->request_mode=ssh_scp_integer_mode(&buffer[1]);
|
|
tmp=p;
|
|
p=strchr(p,' ');
|
|
if(p==NULL)
|
|
goto error;
|
|
*p=0;
|
|
size = strtoull(tmp,NULL,10);
|
|
p++;
|
|
name=strdup(p);
|
|
SAFE_FREE(scp->request_name);
|
|
scp->request_name=name;
|
|
if(buffer[0]=='C'){
|
|
scp->filelen=size;
|
|
scp->request_type=SSH_SCP_REQUEST_NEWFILE;
|
|
} else {
|
|
scp->filelen='0';
|
|
scp->request_type=SSH_SCP_REQUEST_NEWDIR;
|
|
}
|
|
scp->state=SSH_SCP_READ_REQUESTED;
|
|
scp->processed = 0;
|
|
return scp->request_type;
|
|
break;
|
|
case 'E':
|
|
scp->request_type=SSH_SCP_REQUEST_ENDDIR;
|
|
ssh_channel_write(scp->channel,"",1);
|
|
return scp->request_type;
|
|
case 0x1:
|
|
ssh_set_error(scp->session,SSH_REQUEST_DENIED,"SCP: Warning: %s",&buffer[1]);
|
|
scp->request_type=SSH_SCP_REQUEST_WARNING;
|
|
SAFE_FREE(scp->warning);
|
|
scp->warning=strdup(&buffer[1]);
|
|
return scp->request_type;
|
|
case 0x2:
|
|
ssh_set_error(scp->session,SSH_FATAL,"SCP: Error: %s",&buffer[1]);
|
|
return SSH_ERROR;
|
|
case 'T':
|
|
/* Timestamp */
|
|
default:
|
|
ssh_set_error(scp->session,SSH_FATAL,"Unhandled message: (%d)%s",buffer[0],buffer);
|
|
return SSH_ERROR;
|
|
}
|
|
|
|
/* a parsing error occured */
|
|
error:
|
|
SAFE_FREE(name);
|
|
SAFE_FREE(mode);
|
|
ssh_set_error(scp->session,SSH_FATAL,"Parsing error while parsing message: %s",buffer);
|
|
return SSH_ERROR;
|
|
}
|
|
|
|
/**
|
|
* @brief Deny the transfer of a file or creation of a directory coming from the
|
|
* remote party.
|
|
*
|
|
* @param[in] scp The scp handle.
|
|
* @param[in] reason A nul-terminated string with a human-readable
|
|
* explanation of the deny.
|
|
*
|
|
* @returns SSH_OK if the message was sent, SSH_ERROR if the sending
|
|
* the message failed, or sending it in a bad state.
|
|
*/
|
|
int ssh_scp_deny_request(ssh_scp scp, const char *reason){
|
|
char buffer[4096];
|
|
int err;
|
|
if(scp==NULL)
|
|
return SSH_ERROR;
|
|
if(scp->state != SSH_SCP_READ_REQUESTED){
|
|
ssh_set_error(scp->session,SSH_FATAL,"ssh_scp_deny_request called under invalid state");
|
|
return SSH_ERROR;
|
|
}
|
|
snprintf(buffer,sizeof(buffer),"%c%s\n",2,reason);
|
|
err=ssh_channel_write(scp->channel,buffer,strlen(buffer));
|
|
if(err==SSH_ERROR) {
|
|
return SSH_ERROR;
|
|
}
|
|
else {
|
|
scp->state=SSH_SCP_READ_INITED;
|
|
return SSH_OK;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Accepts transfer of a file or creation of a directory coming from the
|
|
* remote party.
|
|
*
|
|
* @param[in] scp The scp handle.
|
|
*
|
|
* @returns SSH_OK if the message was sent, SSH_ERROR if sending the
|
|
* message failed, or sending it in a bad state.
|
|
*/
|
|
int ssh_scp_accept_request(ssh_scp scp){
|
|
char buffer[]={0x00};
|
|
int err;
|
|
if(scp==NULL)
|
|
return SSH_ERROR;
|
|
if(scp->state != SSH_SCP_READ_REQUESTED){
|
|
ssh_set_error(scp->session,SSH_FATAL,"ssh_scp_deny_request called under invalid state");
|
|
return SSH_ERROR;
|
|
}
|
|
err=ssh_channel_write(scp->channel,buffer,1);
|
|
if(err==SSH_ERROR) {
|
|
return SSH_ERROR;
|
|
}
|
|
if(scp->request_type==SSH_SCP_REQUEST_NEWFILE)
|
|
scp->state=SSH_SCP_READ_READING;
|
|
else
|
|
scp->state=SSH_SCP_READ_INITED;
|
|
return SSH_OK;
|
|
}
|
|
|
|
/** @brief Read from a remote scp file
|
|
* @param[in] scp The scp handle.
|
|
*
|
|
* @param[in] buffer The destination buffer.
|
|
*
|
|
* @param[in] size The size of the buffer.
|
|
*
|
|
* @returns The nNumber of bytes read, SSH_ERROR if an error occured
|
|
* while reading.
|
|
*/
|
|
int ssh_scp_read(ssh_scp scp, void *buffer, size_t size){
|
|
int r;
|
|
int code;
|
|
if(scp==NULL)
|
|
return SSH_ERROR;
|
|
if(scp->state == SSH_SCP_READ_REQUESTED && scp->request_type == SSH_SCP_REQUEST_NEWFILE){
|
|
r=ssh_scp_accept_request(scp);
|
|
if(r==SSH_ERROR)
|
|
return r;
|
|
}
|
|
if(scp->state != SSH_SCP_READ_READING){
|
|
ssh_set_error(scp->session,SSH_FATAL,"ssh_scp_read called under invalid state");
|
|
return SSH_ERROR;
|
|
}
|
|
if(scp->processed + size > scp->filelen)
|
|
size = (size_t) (scp->filelen - scp->processed);
|
|
if(size > 65536)
|
|
size=65536; /* avoid too large reads */
|
|
r=ssh_channel_read(scp->channel,buffer,size,0);
|
|
if(r != SSH_ERROR)
|
|
scp->processed += r;
|
|
else {
|
|
scp->state=SSH_SCP_ERROR;
|
|
return SSH_ERROR;
|
|
}
|
|
/* Check if we arrived at end of file */
|
|
if(scp->processed == scp->filelen) {
|
|
scp->processed=scp->filelen=0;
|
|
ssh_channel_write(scp->channel,"",1);
|
|
code=ssh_scp_response(scp,NULL);
|
|
if(code == 0){
|
|
scp->state=SSH_SCP_READ_INITED;
|
|
return r;
|
|
}
|
|
if(code==1){
|
|
scp->state=SSH_SCP_READ_INITED;
|
|
return SSH_ERROR;
|
|
}
|
|
scp->state=SSH_SCP_ERROR;
|
|
return SSH_ERROR;
|
|
}
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* @brief Get the name of the directory or file being pushed from the other
|
|
* party.
|
|
*
|
|
* @returns The file name, NULL on error. The string should not be
|
|
* freed.
|
|
*/
|
|
const char *ssh_scp_request_get_filename(ssh_scp scp){
|
|
if(scp==NULL)
|
|
return NULL;
|
|
return scp->request_name;
|
|
}
|
|
|
|
/**
|
|
* @brief Get the permissions of the directory or file being pushed from the
|
|
* other party.
|
|
*
|
|
* @returns The UNIX permission, e.g 0644, -1 on error.
|
|
*/
|
|
int ssh_scp_request_get_permissions(ssh_scp scp){
|
|
if(scp==NULL)
|
|
return -1;
|
|
return scp->request_mode;
|
|
}
|
|
|
|
/** @brief Get the size of the file being pushed from the other party.
|
|
*
|
|
* @returns The numeric size of the file being read.
|
|
* @warning The real size may not fit in a 32 bits field and may
|
|
* be truncated.
|
|
* @see ssh_scp_request_get_size64()
|
|
*/
|
|
size_t ssh_scp_request_get_size(ssh_scp scp){
|
|
if(scp==NULL)
|
|
return 0;
|
|
return (size_t)scp->filelen;
|
|
}
|
|
|
|
/** @brief Get the size of the file being pushed from the other party.
|
|
*
|
|
* @returns The numeric size of the file being read.
|
|
*/
|
|
uint64_t ssh_scp_request_get_size64(ssh_scp scp){
|
|
if(scp==NULL)
|
|
return 0;
|
|
return scp->filelen;
|
|
}
|
|
|
|
/**
|
|
* @brief Convert a scp text mode to an integer.
|
|
*
|
|
* @param[in] mode The mode to convert, e.g. "0644".
|
|
*
|
|
* @returns An integer value, e.g. 420 for "0644".
|
|
*/
|
|
int ssh_scp_integer_mode(const char *mode){
|
|
int value=strtoul(mode,NULL,8) & 0xffff;
|
|
return value;
|
|
}
|
|
|
|
/**
|
|
* @brief Convert a unix mode into a scp string.
|
|
*
|
|
* @param[in] mode The mode to convert, e.g. 420 or 0644.
|
|
*
|
|
* @returns A pointer to a malloc'ed string containing the scp mode,
|
|
* e.g. "0644".
|
|
*/
|
|
char *ssh_scp_string_mode(int mode){
|
|
char buffer[16];
|
|
snprintf(buffer,sizeof(buffer),"%.4d",mode);
|
|
return strdup(buffer);
|
|
}
|
|
|
|
/**
|
|
* @brief Get the warning string from a scp handle.
|
|
*
|
|
* @param[in] scp The scp handle.
|
|
*
|
|
* @returns A warning string, or NULL on error. The string should
|
|
* not be freed.
|
|
*/
|
|
const char *ssh_scp_request_get_warning(ssh_scp scp){
|
|
if(scp==NULL)
|
|
return NULL;
|
|
return scp->warning;
|
|
}
|
|
|
|
/** @} */
|
|
|
|
/* vim: set ts=4 sw=4 et cindent: */
|