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authorAris Adamantiadis <aris@0xbadc0de.be>2005-08-26 00:25:01 +0000
committerAris Adamantiadis <aris@0xbadc0de.be>2005-08-26 00:25:01 +0000
commite2bdc2f66c85d4d1a38b2511cb98da105cafcc24 (patch)
treec32b3d25c0e927d3bc7e9ecb943ce2549f1261df /libssh/sftpserver.c
parent35221f967ef5e9801c2496a7f10ced1408f9cd20 (diff)
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sftp server implementation :)
at this time, basic support of opendir, readdir, lstat, etc. just enough to "sftp" in and type ls. git-svn-id: svn+ssh://svn.berlios.de/svnroot/repos/libssh/trunk@16 7dcaeef0-15fb-0310-b436-a5af3365683c
Diffstat (limited to 'libssh/sftpserver.c')
-rw-r--r--libssh/sftpserver.c244
1 files changed, 244 insertions, 0 deletions
diff --git a/libssh/sftpserver.c b/libssh/sftpserver.c
new file mode 100644
index 00000000..fd759a12
--- /dev/null
+++ b/libssh/sftpserver.c
@@ -0,0 +1,244 @@
+/* sftpserver.c contains server based function for the sftp protocol */
+/*
+Copyright 2005 Aris Adamantiadis
+
+This file is part of the SSH Library
+
+The SSH Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or (at your
+option) any later version.
+
+The SSH Library is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the SSH Library; see the file COPYING. If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+MA 02111-1307, USA. */
+#include "libssh/libssh.h"
+#include "libssh/sftp.h"
+#include "libssh/ssh2.h"
+#include "libssh/priv.h"
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <netdb.h>
+
+SFTP_CLIENT_MESSAGE *sftp_get_client_message(SFTP_SESSION *sftp){
+ SFTP_PACKET *packet=sftp_packet_read(sftp);
+ SFTP_CLIENT_MESSAGE *msg=malloc(sizeof (SFTP_CLIENT_MESSAGE));
+ BUFFER *payload;
+ STRING *tmp;
+ memset(msg,0,sizeof(SFTP_CLIENT_MESSAGE));
+ if(!packet)
+ return NULL;
+ payload=packet->payload;
+ ssh_say(2,"received sftp packet type %d\n",packet->type);
+ msg->type=packet->type;
+ msg->sftp=sftp;
+ buffer_get_u32(payload,&msg->id);
+ switch(msg->type){
+ case SSH_FXP_CLOSE:
+ case SSH_FXP_READDIR:
+ msg->handle=buffer_get_ssh_string(payload);
+ break;
+ case SSH_FXP_READ:
+ msg->handle=buffer_get_ssh_string(payload);
+ buffer_get_u64(payload,&msg->offset);
+ buffer_get_u32(payload,&msg->len);
+ break;
+ case SSH_FXP_WRITE:
+ msg->handle=buffer_get_ssh_string(payload);
+ buffer_get_u64(payload,&msg->offset);
+ msg->data=buffer_get_ssh_string(payload);
+ break;
+ case SSH_FXP_REMOVE:
+ case SSH_FXP_RMDIR:
+ case SSH_FXP_OPENDIR:
+ case SSH_FXP_READLINK:
+ case SSH_FXP_REALPATH:
+ tmp=buffer_get_ssh_string(payload);
+ msg->filename=string_to_char(tmp);
+ free(tmp);
+ break;
+ case SSH_FXP_RENAME:
+ case SSH_FXP_SYMLINK:
+ tmp=buffer_get_ssh_string(payload);
+ msg->filename=string_to_char(tmp);
+ free(tmp);
+ msg->data=buffer_get_ssh_string(payload);
+ break;
+ case SSH_FXP_MKDIR:
+ case SSH_FXP_SETSTAT:
+ tmp=buffer_get_ssh_string(payload);
+ msg->filename=string_to_char(tmp);
+ free(tmp);
+#warning attributes
+ break;
+ case SSH_FXP_FSETSTAT:
+ msg->handle=buffer_get_ssh_string(payload);
+#warning attributes
+ break;
+ case SSH_FXP_LSTAT:
+ case SSH_FXP_STAT:
+ tmp=buffer_get_ssh_string(payload);
+ msg->filename=string_to_char(tmp);
+ free(tmp);
+ if(sftp->version >3)
+ buffer_get_u32(payload,&msg->flags);
+ break;
+ case SSH_FXP_FSTAT:
+ msg->handle=buffer_get_ssh_string(payload);
+ buffer_get_u32(payload,&msg->flags);
+ break;
+ default:
+ printf("Received handled sftp message %d\n",msg->type);
+ }
+ msg->flags=ntohl(msg->flags);
+ msg->offset=ntohll(msg->offset);
+ msg->len=ntohl(msg->len);
+ sftp_packet_free(packet);
+ return msg;
+}
+
+void sftp_client_message_free(SFTP_CLIENT_MESSAGE *msg){
+ if(msg->filename)
+ free(msg->filename);
+ if(msg->data)
+ free(msg->data);
+ if(msg->attr)
+ sftp_attributes_free(msg->attr);
+ if(msg->handle)
+ free(msg->handle);
+ memset(msg,'X',sizeof(*msg));
+ free(msg);
+}
+
+int sftp_reply_name(SFTP_CLIENT_MESSAGE *msg, char *name, SFTP_ATTRIBUTES *attr){
+ BUFFER *out=buffer_new();
+ STRING *file=string_from_char(name);
+ int r;
+ buffer_add_u32(out,msg->id);
+ buffer_add_u32(out,htonl(1));
+ buffer_add_ssh_string(out,file);
+ buffer_add_ssh_string(out,file); /* the protocol is broken here between 3 & 4 */
+ free(file);
+ buffer_add_attributes(out,attr);
+ r=sftp_packet_write(msg->sftp,SSH_FXP_NAME,out);
+ buffer_free(out);
+ return r<0;
+}
+
+int sftp_reply_handle(SFTP_CLIENT_MESSAGE *msg, STRING *handle){
+ BUFFER *out=buffer_new();
+ int r;
+ buffer_add_u32(out,msg->id);
+ buffer_add_ssh_string(out,handle);
+ r=sftp_packet_write(msg->sftp,SSH_FXP_HANDLE,out);
+ buffer_free(out);
+ return r<0;
+}
+
+int sftp_reply_attr(SFTP_CLIENT_MESSAGE *msg, SFTP_ATTRIBUTES *attr){
+ BUFFER *out=buffer_new();
+ int r;
+ buffer_add_u32(out,msg->id);
+ buffer_add_attributes(out,attr);
+ r=sftp_packet_write(msg->sftp,SSH_FXP_ATTRS,out);
+ buffer_free(out);
+ return r<0;
+}
+
+int sftp_reply_names_add(SFTP_CLIENT_MESSAGE *msg, char *file, char *longname,
+ SFTP_ATTRIBUTES *attr){
+ STRING *name=string_from_char(file);
+ if(!msg->attrbuf)
+ msg->attrbuf=buffer_new();
+ buffer_add_ssh_string(msg->attrbuf,name);
+ free(name);
+ name=string_from_char(longname);
+ buffer_add_ssh_string(msg->attrbuf,name);
+ free(name);
+ buffer_add_attributes(msg->attrbuf,attr);
+ msg->attr_num++;
+ return 0;
+}
+
+int sftp_reply_names(SFTP_CLIENT_MESSAGE *msg){
+ BUFFER *out=buffer_new();
+ int r;
+ buffer_add_u32(out,msg->id);
+ buffer_add_u32(out,htonl(msg->attr_num));
+ buffer_add_data(out,buffer_get(msg->attrbuf),
+ buffer_get_len(msg->attrbuf));
+ r=sftp_packet_write(msg->sftp,SSH_FXP_NAME,out);
+ buffer_free(out);
+ buffer_free(msg->attrbuf);
+ msg->attr_num=0;
+ msg->attrbuf=NULL;
+ return r<0;
+}
+
+
+int sftp_reply_status(SFTP_CLIENT_MESSAGE *msg, u32 status, char *message){
+ BUFFER *out=buffer_new();
+ int r;
+ STRING *s;
+ buffer_add_u32(out,msg->id);
+ buffer_add_u32(out,htonl(status));
+ s=string_from_char(message?message:"");
+ buffer_add_ssh_string(out,s);
+ free(s);
+ buffer_add_u32(out,0); // language string
+ r=sftp_packet_write(msg->sftp,SSH_FXP_STATUS,out);
+ buffer_free(out);
+ return r<0;
+}
+
+/* this function will return you a new handle to give the client.
+ * the function accepts an info that can be retrieved later with
+ * the handle. Care is given that a corrupted handle won't give a
+ * valid info (or worse). */
+STRING *sftp_handle_alloc(SFTP_SESSION *sftp, void *info){
+ int i;
+ u32 val;
+ STRING *ret;
+ if(!sftp->handles){
+ sftp->handles=malloc(sizeof(void *) * SFTP_HANDLES);
+ memset(sftp->handles,0,sizeof(void *)*SFTP_HANDLES);
+ }
+ for(i=0; i<SFTP_HANDLES;++i)
+ if(!sftp->handles[i])
+ break;
+ if(i==SFTP_HANDLES)
+ return NULL; // no handle available
+ val=i;
+ ret=string_new(4);
+ memcpy(ret->string,&val,sizeof(u32));
+ sftp->handles[i]=info;
+ return ret;
+}
+
+void *sftp_handle(SFTP_SESSION *sftp, STRING *handle){
+ u32 val;
+ if(!sftp->handles)
+ return NULL;
+ if(string_len(handle)!=sizeof(val))
+ return NULL;
+ memcpy(&val,handle->string,sizeof(u32));
+ if(val>SFTP_HANDLES)
+ return NULL;
+ return sftp->handles[val];
+}
+void sftp_handle_remove(SFTP_SESSION *sftp, void *handle){
+ int i;
+ for(i=0;i<SFTP_HANDLES;++i){
+ if(sftp->handles[i]==handle){
+ sftp->handles[i]=NULL;
+ break;
+ }
+ }
+}