libssh2: move data from connection object to transfer object

Readdir data, filenames and attributes are strictly related to the
transfer and not the connection. This also reduces the total size of the
fixed connectdata struct.

Closes #6519

2 files changed, 149 insertions, 139 deletions

diff --git a/lib/vssh/libssh2.c b/lib/vssh/libssh2.c
index 0e2d6f824..04daec9a3 100644
--- a/lib/vssh/libssh2.c
+++ b/lib/vssh/libssh2.c
@@ -767,8 +767,8 @@ static CURLcode ssh_force_knownhost_key_type(struct Curl_easy *data)
 
       infof(data, "Set \"%s\" as SSH hostkey type\n", hostkey_method);
       result = libssh2_session_error_to_CURLE(
-          libssh2_session_method_pref(
-              sshc->ssh_session, LIBSSH2_METHOD_HOSTKEY, hostkey_method));
+        libssh2_session_method_pref(
+          sshc->ssh_session, LIBSSH2_METHOD_HOSTKEY, hostkey_method));
     }
     else {
       infof(data, "Did not find host %s in %s\n",
@@ -792,7 +792,7 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
 {
   CURLcode result = CURLE_OK;
   struct connectdata *conn = data->conn;
-  struct SSHPROTO *sftp_scp = data->req.p.ssh;
+  struct SSHPROTO *sshp = data->req.p.ssh;
   struct ssh_conn *sshc = &conn->proto.sshc;
   curl_socket_t sock = conn->sock[FIRSTSOCKET];
   int rc = LIBSSH2_ERROR_NONE;
@@ -803,7 +803,6 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
   *block = 0; /* we're not blocking by default */
 
   do {
-
     switch(sshc->state) {
     case SSH_INIT:
       sshc->secondCreateDirs = 0;
@@ -1275,7 +1274,7 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
 
     case SSH_SFTP_QUOTE_INIT:
 
-      result = Curl_getworkingpath(data, sshc->homedir, &sftp_scp->path);
+      result = Curl_getworkingpath(data, sshc->homedir, &sshp->path);
       if(result) {
         sshc->actualcode = result;
         state(data, SSH_STOP);
@@ -1330,7 +1329,7 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
       if(strcasecompare("pwd", cmd)) {
         /* output debug output if that is requested */
         char *tmp = aprintf("257 \"%s\" is current directory.\n",
-                            sftp_scp->path);
+                            sshp->path);
         if(!tmp) {
           result = CURLE_OUT_OF_MEMORY;
           state(data, SSH_SFTP_CLOSE);
@@ -1412,7 +1411,7 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
             sshc->actualcode = result;
             break;
           }
-          memset(&sshc->quote_attrs, 0, sizeof(LIBSSH2_SFTP_ATTRIBUTES));
+          memset(&sshp->quote_attrs, 0, sizeof(LIBSSH2_SFTP_ATTRIBUTES));
           state(data, SSH_SFTP_QUOTE_STAT);
           break;
         }
@@ -1531,7 +1530,7 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
         rc = libssh2_sftp_stat_ex(sshc->sftp_session, sshc->quote_path2,
                                   curlx_uztoui(strlen(sshc->quote_path2)),
                                   LIBSSH2_SFTP_STAT,
-                                  &sshc->quote_attrs);
+                                  &sshp->quote_attrs);
         if(rc == LIBSSH2_ERROR_EAGAIN) {
           break;
         }
@@ -1550,9 +1549,9 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
 
       /* Now set the new attributes... */
       if(strncasecompare(cmd, "chgrp", 5)) {
-        sshc->quote_attrs.gid = strtoul(sshc->quote_path1, NULL, 10);
-        sshc->quote_attrs.flags = LIBSSH2_SFTP_ATTR_UIDGID;
-        if(sshc->quote_attrs.gid == 0 && !ISDIGIT(sshc->quote_path1[0]) &&
+        sshp->quote_attrs.gid = strtoul(sshc->quote_path1, NULL, 10);
+        sshp->quote_attrs.flags = LIBSSH2_SFTP_ATTR_UIDGID;
+        if(sshp->quote_attrs.gid == 0 && !ISDIGIT(sshc->quote_path1[0]) &&
            !sshc->acceptfail) {
           Curl_safefree(sshc->quote_path1);
           Curl_safefree(sshc->quote_path2);
@@ -1564,10 +1563,10 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
         }
       }
       else if(strncasecompare(cmd, "chmod", 5)) {
-        sshc->quote_attrs.permissions = strtoul(sshc->quote_path1, NULL, 8);
-        sshc->quote_attrs.flags = LIBSSH2_SFTP_ATTR_PERMISSIONS;
+        sshp->quote_attrs.permissions = strtoul(sshc->quote_path1, NULL, 8);
+        sshp->quote_attrs.flags = LIBSSH2_SFTP_ATTR_PERMISSIONS;
         /* permissions are octal */
-        if(sshc->quote_attrs.permissions == 0 &&
+        if(sshp->quote_attrs.permissions == 0 &&
            !ISDIGIT(sshc->quote_path1[0])) {
           Curl_safefree(sshc->quote_path1);
           Curl_safefree(sshc->quote_path2);
@@ -1579,9 +1578,9 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
         }
       }
       else if(strncasecompare(cmd, "chown", 5)) {
-        sshc->quote_attrs.uid = strtoul(sshc->quote_path1, NULL, 10);
-        sshc->quote_attrs.flags = LIBSSH2_SFTP_ATTR_UIDGID;
-        if(sshc->quote_attrs.uid == 0 && !ISDIGIT(sshc->quote_path1[0]) &&
+        sshp->quote_attrs.uid = strtoul(sshc->quote_path1, NULL, 10);
+        sshp->quote_attrs.flags = LIBSSH2_SFTP_ATTR_UIDGID;
+        if(sshp->quote_attrs.uid == 0 && !ISDIGIT(sshc->quote_path1[0]) &&
            !sshc->acceptfail) {
           Curl_safefree(sshc->quote_path1);
           Curl_safefree(sshc->quote_path2);
@@ -1603,8 +1602,8 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
           sshc->actualcode = CURLE_QUOTE_ERROR;
           break;
         }
-        sshc->quote_attrs.atime = (unsigned long)date;
-        sshc->quote_attrs.flags = LIBSSH2_SFTP_ATTR_ACMODTIME;
+        sshp->quote_attrs.atime = (unsigned long)date;
+        sshp->quote_attrs.flags = LIBSSH2_SFTP_ATTR_ACMODTIME;
       }
       else if(strncasecompare(cmd, "mtime", 5)) {
         time_t date = Curl_getdate_capped(sshc->quote_path1);
@@ -1617,8 +1616,8 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
           sshc->actualcode = CURLE_QUOTE_ERROR;
           break;
         }
-        sshc->quote_attrs.mtime = (unsigned long)date;
-        sshc->quote_attrs.flags = LIBSSH2_SFTP_ATTR_ACMODTIME;
+        sshp->quote_attrs.mtime = (unsigned long)date;
+        sshp->quote_attrs.flags = LIBSSH2_SFTP_ATTR_ACMODTIME;
       }
 
       /* Now send the completed structure... */
@@ -1630,7 +1629,7 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
       rc = libssh2_sftp_stat_ex(sshc->sftp_session, sshc->quote_path2,
                                 curlx_uztoui(strlen(sshc->quote_path2)),
                                 LIBSSH2_SFTP_SETSTAT,
-                                &sshc->quote_attrs);
+                                &sshp->quote_attrs);
       if(rc == LIBSSH2_ERROR_EAGAIN) {
         break;
       }
@@ -1823,8 +1822,8 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
     {
       LIBSSH2_SFTP_ATTRIBUTES attrs;
 
-      rc = libssh2_sftp_stat_ex(sshc->sftp_session, sftp_scp->path,
-                                curlx_uztoui(strlen(sftp_scp->path)),
+      rc = libssh2_sftp_stat_ex(sshc->sftp_session, sshp->path,
+                                curlx_uztoui(strlen(sshp->path)),
                                 LIBSSH2_SFTP_STAT, &attrs);
       if(rc == LIBSSH2_ERROR_EAGAIN) {
         break;
@@ -1841,7 +1840,7 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
       if(data->set.upload)
         state(data, SSH_SFTP_UPLOAD_INIT);
       else {
-        if(sftp_scp->path[strlen(sftp_scp->path)-1] == '/')
+        if(sshp->path[strlen(sshp->path)-1] == '/')
           state(data, SSH_SFTP_READDIR_INIT);
         else
           state(data, SSH_SFTP_DOWNLOAD_INIT);
@@ -1861,8 +1860,8 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
       if(data->state.resume_from != 0) {
         LIBSSH2_SFTP_ATTRIBUTES attrs;
         if(data->state.resume_from < 0) {
-          rc = libssh2_sftp_stat_ex(sshc->sftp_session, sftp_scp->path,
-                                    curlx_uztoui(strlen(sftp_scp->path)),
+          rc = libssh2_sftp_stat_ex(sshc->sftp_session, sshp->path,
+                                    curlx_uztoui(strlen(sshp->path)),
                                     LIBSSH2_SFTP_STAT, &attrs);
           if(rc == LIBSSH2_ERROR_EAGAIN) {
             break;
@@ -1892,8 +1891,8 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
         flags = LIBSSH2_FXF_WRITE|LIBSSH2_FXF_CREAT|LIBSSH2_FXF_TRUNC;
 
       sshc->sftp_handle =
-        libssh2_sftp_open_ex(sshc->sftp_session, sftp_scp->path,
-                             curlx_uztoui(strlen(sftp_scp->path)),
+        libssh2_sftp_open_ex(sshc->sftp_session, sshp->path,
+                             curlx_uztoui(strlen(sshp->path)),
                              flags, data->set.new_file_perms,
                              LIBSSH2_SFTP_OPENFILE);
 
@@ -1922,7 +1921,7 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
             (sftperr == LIBSSH2_FX_FAILURE) ||
             (sftperr == LIBSSH2_FX_NO_SUCH_PATH)) &&
            (data->set.ftp_create_missing_dirs &&
-            (strlen(sftp_scp->path) > 1))) {
+            (strlen(sshp->path) > 1))) {
           /* try to create the path remotely */
           rc = 0; /* clear rc and continue */
           sshc->secondCreateDirs = 1;
@@ -2032,8 +2031,8 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
     }
 
     case SSH_SFTP_CREATE_DIRS_INIT:
-      if(strlen(sftp_scp->path) > 1) {
-        sshc->slash_pos = sftp_scp->path + 1; /* ignore the leading '/' */
+      if(strlen(sshp->path) > 1) {
+        sshc->slash_pos = sshp->path + 1; /* ignore the leading '/' */
         state(data, SSH_SFTP_CREATE_DIRS);
       }
       else {
@@ -2046,7 +2045,7 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
       if(sshc->slash_pos) {
         *sshc->slash_pos = 0;
 
-        infof(data, "Creating directory '%s'\n", sftp_scp->path);
+        infof(data, "Creating directory '%s'\n", sshp->path);
         state(data, SSH_SFTP_CREATE_DIRS_MKDIR);
         break;
       }
@@ -2055,8 +2054,8 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
 
     case SSH_SFTP_CREATE_DIRS_MKDIR:
       /* 'mode' - parameter is preliminary - default to 0644 */
-      rc = libssh2_sftp_mkdir_ex(sshc->sftp_session, sftp_scp->path,
-                                 curlx_uztoui(strlen(sftp_scp->path)),
+      rc = libssh2_sftp_mkdir_ex(sshc->sftp_session, sshp->path,
+                                 curlx_uztoui(strlen(sshp->path)),
                                  data->set.new_directory_perms);
       if(rc == LIBSSH2_ERROR_EAGAIN) {
         break;
@@ -2095,9 +2094,9 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
        * listing
        */
       sshc->sftp_handle = libssh2_sftp_open_ex(sshc->sftp_session,
-                                               sftp_scp->path,
+                                               sshp->path,
                                                curlx_uztoui(
-                                                 strlen(sftp_scp->path)),
+                                                 strlen(sshp->path)),
                                                0, 0, LIBSSH2_SFTP_OPENDIR);
       if(!sshc->sftp_handle) {
         if(libssh2_session_last_errno(sshc->ssh_session) ==
@@ -2113,40 +2112,40 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
         sshc->actualcode = result?result:CURLE_SSH;
         break;
       }
-      sshc->readdir_filename = malloc(PATH_MAX + 1);
-      if(!sshc->readdir_filename) {
+      sshp->readdir_filename = malloc(PATH_MAX + 1);
+      if(!sshp->readdir_filename) {
         state(data, SSH_SFTP_CLOSE);
         sshc->actualcode = CURLE_OUT_OF_MEMORY;
         break;
       }
-      sshc->readdir_longentry = malloc(PATH_MAX + 1);
-      if(!sshc->readdir_longentry) {
-        Curl_safefree(sshc->readdir_filename);
+      sshp->readdir_longentry = malloc(PATH_MAX + 1);
+      if(!sshp->readdir_longentry) {
+        Curl_safefree(sshp->readdir_filename);
         state(data, SSH_SFTP_CLOSE);
         sshc->actualcode = CURLE_OUT_OF_MEMORY;
         break;
       }
-      Curl_dyn_init(&sshc->readdir, PATH_MAX * 2);
+      Curl_dyn_init(&sshp->readdir, PATH_MAX * 2);
       state(data, SSH_SFTP_READDIR);
       break;
 
     case SSH_SFTP_READDIR:
       rc = libssh2_sftp_readdir_ex(sshc->sftp_handle,
-                                   sshc->readdir_filename,
+                                   sshp->readdir_filename,
                                    PATH_MAX,
-                                   sshc->readdir_longentry,
+                                   sshp->readdir_longentry,
                                    PATH_MAX,
-                                   &sshc->readdir_attrs);
+                                   &sshp->readdir_attrs);
       if(rc == LIBSSH2_ERROR_EAGAIN) {
         break;
       }
       if(rc > 0) {
         readdir_len = (size_t) rc;
-        sshc->readdir_filename[readdir_len] = '\0';
+        sshp->readdir_filename[readdir_len] = '\0';
 
         if(data->set.ftp_list_only) {
           result = Curl_client_write(data, CLIENTWRITE_BODY,
-                                     sshc->readdir_filename,
+                                     sshp->readdir_filename,
                                      readdir_len);
           if(!result)
             result = Curl_client_write(data, CLIENTWRITE_BODY,
@@ -2160,19 +2159,19 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
           data->req.bytecount += readdir_len + 1;
 
           /* output debug output if that is requested */
-          Curl_debug(data, CURLINFO_DATA_IN, sshc->readdir_filename,
+          Curl_debug(data, CURLINFO_DATA_IN, sshp->readdir_filename,
                      readdir_len);
           Curl_debug(data, CURLINFO_DATA_IN, (char *)"\n", 1);
         }
         else {
-          result = Curl_dyn_add(&sshc->readdir, sshc->readdir_longentry);
+          result = Curl_dyn_add(&sshp->readdir, sshp->readdir_longentry);
 
           if(!result) {
-            if((sshc->readdir_attrs.flags & LIBSSH2_SFTP_ATTR_PERMISSIONS) &&
-               ((sshc->readdir_attrs.permissions & LIBSSH2_SFTP_S_IFMT) ==
+            if((sshp->readdir_attrs.flags & LIBSSH2_SFTP_ATTR_PERMISSIONS) &&
+               ((sshp->readdir_attrs.permissions & LIBSSH2_SFTP_S_IFMT) ==
                 LIBSSH2_SFTP_S_IFLNK)) {
-              Curl_dyn_init(&sshc->readdir_link, PATH_MAX);
-              result = Curl_dyn_add(&sshc->readdir_link, sftp_scp->path);
+              Curl_dyn_init(&sshp->readdir_link, PATH_MAX);
+              result = Curl_dyn_add(&sshp->readdir_link, sshp->path);
               state(data, SSH_SFTP_READDIR_LINK);
               if(!result)
                 break;
@@ -2188,8 +2187,8 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
         }
       }
       else if(rc == 0) {
-        Curl_safefree(sshc->readdir_filename);
-        Curl_safefree(sshc->readdir_longentry);
+        Curl_safefree(sshp->readdir_filename);
+        Curl_safefree(sshp->readdir_longentry);
         state(data, SSH_SFTP_READDIR_DONE);
         break;
       }
@@ -2200,8 +2199,8 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
         failf(data, "Could not open remote file for reading: %s :: %d",
               sftp_libssh2_strerror(sftperr),
               libssh2_session_last_errno(sshc->ssh_session));
-        Curl_safefree(sshc->readdir_filename);
-        Curl_safefree(sshc->readdir_longentry);
+        Curl_safefree(sshp->readdir_filename);
+        Curl_safefree(sshp->readdir_longentry);
         state(data, SSH_SFTP_CLOSE);
         break;
       }
@@ -2210,22 +2209,22 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
     case SSH_SFTP_READDIR_LINK:
       rc =
         libssh2_sftp_symlink_ex(sshc->sftp_session,
-                                Curl_dyn_ptr(&sshc->readdir_link),
-                                (int)Curl_dyn_len(&sshc->readdir_link),
-                                sshc->readdir_filename,
+                                Curl_dyn_ptr(&sshp->readdir_link),
+                                (int)Curl_dyn_len(&sshp->readdir_link),
+                                sshp->readdir_filename,
                                 PATH_MAX, LIBSSH2_SFTP_READLINK);
       if(rc == LIBSSH2_ERROR_EAGAIN) {
         break;
       }
-      Curl_dyn_free(&sshc->readdir_link);
+      Curl_dyn_free(&sshp->readdir_link);
 
       /* append filename and extra output */
-      result = Curl_dyn_addf(&sshc->readdir, " -> %s", sshc->readdir_filename);
+      result = Curl_dyn_addf(&sshp->readdir, " -> %s", sshp->readdir_filename);
 
       if(result) {
         sshc->readdir_line = NULL;
-        Curl_safefree(sshc->readdir_filename);
-        Curl_safefree(sshc->readdir_longentry);
+        Curl_safefree(sshp->readdir_filename);
+        Curl_safefree(sshp->readdir_longentry);
         state(data, SSH_SFTP_CLOSE);
         sshc->actualcode = result;
         break;
@@ -2235,25 +2234,25 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
       break;
 
     case SSH_SFTP_READDIR_BOTTOM:
-      result = Curl_dyn_addn(&sshc->readdir, "\n", 1);
+      result = Curl_dyn_addn(&sshp->readdir, "\n", 1);
       if(!result)
         result = Curl_client_write(data, CLIENTWRITE_BODY,
-                                   Curl_dyn_ptr(&sshc->readdir),
-                                   Curl_dyn_len(&sshc->readdir));
+                                   Curl_dyn_ptr(&sshp->readdir),
+                                   Curl_dyn_len(&sshp->readdir));
 
       if(!result) {
         /* output debug output if that is requested */
         Curl_debug(data, CURLINFO_DATA_IN,
-                   Curl_dyn_ptr(&sshc->readdir),
-                   Curl_dyn_len(&sshc->readdir));
-        data->req.bytecount += Curl_dyn_len(&sshc->readdir);
+                   Curl_dyn_ptr(&sshp->readdir),
+                   Curl_dyn_len(&sshp->readdir));
+        data->req.bytecount += Curl_dyn_len(&sshp->readdir);
       }
       if(result) {
-        Curl_dyn_free(&sshc->readdir);
+        Curl_dyn_free(&sshp->readdir);
         state(data, SSH_STOP);
       }
       else {
-        Curl_dyn_reset(&sshc->readdir);
+        Curl_dyn_reset(&sshp->readdir);
         state(data, SSH_SFTP_READDIR);
       }
       break;
@@ -2265,8 +2264,8 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
         break;
       }
       sshc->sftp_handle = NULL;
-      Curl_safefree(sshc->readdir_filename);
-      Curl_safefree(sshc->readdir_longentry);
+      Curl_safefree(sshp->readdir_filename);
+      Curl_safefree(sshp->readdir_longentry);
 
       /* no data to transfer */
       Curl_setup_transfer(data, -1, -1, FALSE, -1);
@@ -2278,8 +2277,8 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
        * Work on getting the specified file
        */
       sshc->sftp_handle =
-        libssh2_sftp_open_ex(sshc->sftp_session, sftp_scp->path,
-                             curlx_uztoui(strlen(sftp_scp->path)),
+        libssh2_sftp_open_ex(sshc->sftp_session, sshp->path,
+                             curlx_uztoui(strlen(sshp->path)),
                              LIBSSH2_FXF_READ, data->set.new_file_perms,
                              LIBSSH2_SFTP_OPENFILE);
       if(!sshc->sftp_handle) {
@@ -2303,8 +2302,8 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
     {
       LIBSSH2_SFTP_ATTRIBUTES attrs;
 
-      rc = libssh2_sftp_stat_ex(sshc->sftp_session, sftp_scp->path,
-                                curlx_uztoui(strlen(sftp_scp->path)),
+      rc = libssh2_sftp_stat_ex(sshc->sftp_session, sshp->path,
+                                curlx_uztoui(strlen(sshp->path)),
                                 LIBSSH2_SFTP_STAT, &attrs);
       if(rc == LIBSSH2_ERROR_EAGAIN) {
         break;
@@ -2367,7 +2366,7 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
             size = to - from + 1;
           }
 
-          SFTP_SEEK(conn->proto.sshc.sftp_handle, from);
+          SFTP_SEEK(sshc->sftp_handle, from);
         }
         data->req.size = size;
         data->req.maxdownload = size;
@@ -2449,7 +2448,7 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
         sshc->sftp_handle = NULL;
       }
 
-      Curl_safefree(sftp_scp->path);
+      Curl_safefree(sshp->path);
 
       DEBUGF(infof(data, "SFTP DONE done\n"));
 
@@ -2503,7 +2502,7 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
       break;
 
     case SSH_SCP_TRANS_INIT:
-      result = Curl_getworkingpath(data, sshc->homedir, &sftp_scp->path);
+      result = Curl_getworkingpath(data, sshc->homedir, &sshp->path);
       if(result) {
         sshc->actualcode = result;
         state(data, SSH_STOP);
@@ -2532,7 +2531,7 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
        * directory in the path.
        */
       sshc->ssh_channel =
-        SCP_SEND(sshc->ssh_session, sftp_scp->path, data->set.new_file_perms,
+        SCP_SEND(sshc->ssh_session, sshp->path, data->set.new_file_perms,
                  data->state.infilesize);
       if(!sshc->ssh_channel) {
         int ssh_err;
@@ -2600,12 +2599,12 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
       struct stat sb;
       memset(&sb, 0, sizeof(struct stat));
       sshc->ssh_channel = libssh2_scp_recv(sshc->ssh_session,
-                                           sftp_scp->path, &sb);
+                                           sshp->path, &sb);
 #else
       libssh2_struct_stat sb;
       memset(&sb, 0, sizeof(libssh2_struct_stat));
       sshc->ssh_channel = libssh2_scp_recv2(sshc->ssh_session,
-                                            sftp_scp->path, &sb);
+                                            sshp->path, &sb);
 #endif
 
       if(!sshc->ssh_channel) {
@@ -2832,11 +2831,7 @@ static CURLcode ssh_statemach_act(struct Curl_easy *data, bool *block)
       Curl_safefree(sshc->quote_path2);
 
       Curl_safefree(sshc->homedir);
-
-      Curl_safefree(sshc->readdir_filename);
-      Curl_safefree(sshc->readdir_longentry);
       Curl_safefree(sshc->readdir_line);
-      Curl_dyn_free(&sshc->readdir);
 
       /* the code we are about to return */
       result = sshc->actualcode;
@@ -2896,8 +2891,9 @@ static int ssh_getsock(struct Curl_easy *data,
  * function in all cases so that when it _doesn't_ return EAGAIN we can
  * restore the default wait bits.
  */
-static void ssh_block2waitfor(struct connectdata *conn, bool block)
+static void ssh_block2waitfor(struct Curl_easy *data, bool block)
 {
+  struct connectdata *conn = data->conn;
   struct ssh_conn *sshc = &conn->proto.sshc;
   int dir = 0;
   if(block) {
@@ -2928,15 +2924,15 @@ static CURLcode ssh_multi_statemach(struct Curl_easy *data, bool *done)
     /* if there's no error, it isn't done and it didn't EWOULDBLOCK, then
        try again */
   } while(!result && !*done && !block);
-  ssh_block2waitfor(conn, block);
+  ssh_block2waitfor(data, block);
 
   return result;
 }
 
 static CURLcode ssh_block_statemach(struct Curl_easy *data,
-                                   bool duringconnect)
+                                    struct connectdata *conn,
+                                    bool duringconnect)
 {
-  struct connectdata *conn = data->conn;
   struct ssh_conn *sshc = &conn->proto.sshc;
   CURLcode result = CURLE_OK;
 
@@ -3058,19 +3054,24 @@ static CURLcode ssh_connect(struct Curl_easy *data, bool *done)
 #ifdef CURL_LIBSSH2_DEBUG
   curl_socket_t sock;
 #endif
-  struct ssh_conn *ssh;
+  struct SSHPROTO *sshp = data->req.p.ssh;
+  struct ssh_conn *sshc;
   CURLcode result;
   struct connectdata *conn = data->conn;
 
   /* initialize per-handle data if not already */
-  if(!data->req.p.ssh)
-    ssh_setup_connection(data, conn);
+  if(!sshp) {
+    result = ssh_setup_connection(data, conn);
+    if(result)
+      return result;
+    sshp = data->req.p.ssh;
+  }
 
   /* We default to persistent connections. We set this already in this connect
      function to make the re-use checks properly be able to check this bit. */
   connkeep(conn, "SSH default");
 
-  ssh = &conn->proto.sshc;
+  sshc = &conn->proto.sshc;
 
 #ifdef CURL_LIBSSH2_DEBUG
   if(conn->user) {
@@ -3082,10 +3083,10 @@ static CURLcode ssh_connect(struct Curl_easy *data, bool *done)
   sock = conn->sock[FIRSTSOCKET];
 #endif /* CURL_LIBSSH2_DEBUG */
 
-  ssh->ssh_session = libssh2_session_init_ex(my_libssh2_malloc,
-                                             my_libssh2_free,
-                                             my_libssh2_realloc, data);
-  if(ssh->ssh_session == NULL) {
+  sshc->ssh_session = libssh2_session_init_ex(my_libssh2_malloc,
+                                              my_libssh2_free,
+                                              my_libssh2_realloc, data);
+  if(sshc->ssh_session == NULL) {
     failf(data, "Failure initialising ssh session");
     return CURLE_FAILED_INIT;
   }
@@ -3124,15 +3125,15 @@ static CURLcode ssh_connect(struct Curl_easy *data, bool *done)
       int flags, void **abstract);
 
     */
-    libssh2_session_callback_set(ssh->ssh_session,
+    libssh2_session_callback_set(sshc->ssh_session,
                                  LIBSSH2_CALLBACK_RECV, sshrecv.recvp);
-    libssh2_session_callback_set(ssh->ssh_session,
+    libssh2_session_callback_set(sshc->ssh_session,
                                  LIBSSH2_CALLBACK_SEND, sshsend.sendp);
 
     /* Store the underlying TLS recv/send function pointers to be used when
        reading from the proxy */
-    ssh->tls_recv = conn->recv[FIRSTSOCKET];
-    ssh->tls_send = conn->send[FIRSTSOCKET];
+    sshc->tls_recv = conn->recv[FIRSTSOCKET];
+    sshc->tls_send = conn->send[FIRSTSOCKET];
   }
 
 #endif /* CURL_DISABLE_PROXY */
@@ -3147,7 +3148,7 @@ static CURLcode ssh_connect(struct Curl_easy *data, bool *done)
 
   if(data->set.ssh_compression) {
 #if LIBSSH2_VERSION_NUM >= 0x010208
-    if(libssh2_session_flag(ssh->ssh_session, LIBSSH2_FLAG_COMPRESS, 1) < 0)
+    if(libssh2_session_flag(sshc->ssh_session, LIBSSH2_FLAG_COMPRESS, 1) < 0)
 #endif
       infof(data, "Failed to enable compression for ssh session\n");
   }
@@ -3155,14 +3156,14 @@ static CURLcode ssh_connect(struct Curl_easy *data, bool *done)
 #ifdef HAVE_LIBSSH2_KNOWNHOST_API
   if(data->set.str[STRING_SSH_KNOWNHOSTS]) {
     int rc;
-    ssh->kh = libssh2_knownhost_init(ssh->ssh_session);
-    if(!ssh->kh) {
-      libssh2_session_free(ssh->ssh_session);
+    sshc->kh = libssh2_knownhost_init(sshc->ssh_session);
+    if(!sshc->kh) {
+      libssh2_session_free(sshc->ssh_session);
       return CURLE_FAILED_INIT;
     }
 
     /* read all known hosts from there */
-    rc = libssh2_knownhost_readfile(ssh->kh,
+    rc = libssh2_knownhost_readfile(sshc->kh,
                                     data->set.str[STRING_SSH_KNOWNHOSTS],
                                     LIBSSH2_KNOWNHOST_FILE_OPENSSH);
     if(rc < 0)
@@ -3273,15 +3274,15 @@ static CURLcode scp_disconnect(struct Curl_easy *data,
                                bool dead_connection)
 {
   CURLcode result = CURLE_OK;
-  struct ssh_conn *ssh = &conn->proto.sshc;
+  struct ssh_conn *sshc = &conn->proto.sshc;
   (void) dead_connection;
 
-  if(ssh->ssh_session) {
+  if(sshc->ssh_session) {
     /* only if there's a session still around to use! */
 
     state(data, SSH_SESSION_DISCONNECT);
 
-    result = ssh_block_statemach(data, FALSE);
+    result = ssh_block_statemach(data, conn, FALSE);
   }
 
   return result;
@@ -3292,17 +3293,21 @@ static CURLcode scp_disconnect(struct Curl_easy *data,
 static CURLcode ssh_done(struct Curl_easy *data, CURLcode status)
 {
   CURLcode result = CURLE_OK;
-  struct SSHPROTO *sftp_scp = data->req.p.ssh;
+  struct SSHPROTO *sshp = data->req.p.ssh;
+  struct connectdata *conn = data->conn;
 
   if(!status) {
     /* run the state-machine */
-    result = ssh_block_statemach(data, FALSE);
+    result = ssh_block_statemach(data, conn, FALSE);
   }
   else
     result = status;
 
-  if(sftp_scp)
-    Curl_safefree(sftp_scp->path);
+  Curl_safefree(sshp->path);
+  Curl_safefree(sshp->readdir_filename);
+  Curl_safefree(sshp->readdir_longentry);
+  Curl_dyn_free(&sshp->readdir);
+
   if(Curl_pgrsDone(data))
     return CURLE_ABORTED_BY_CALLBACK;
 
@@ -3328,13 +3333,13 @@ static ssize_t scp_send(struct Curl_easy *data, int sockindex,
 {
   ssize_t nwrite;
   struct connectdata *conn = data->conn;
+  struct ssh_conn *sshc = &conn->proto.sshc;
   (void)sockindex; /* we only support SCP on the fixed known primary socket */
 
   /* libssh2_channel_write() returns int! */
-  nwrite = (ssize_t)
-    libssh2_channel_write(conn->proto.sshc.ssh_channel, mem, len);
+  nwrite = (ssize_t) libssh2_channel_write(sshc->ssh_channel, mem, len);
 
-  ssh_block2waitfor(conn, (nwrite == LIBSSH2_ERROR_EAGAIN)?TRUE:FALSE);
+  ssh_block2waitfor(data, (nwrite == LIBSSH2_ERROR_EAGAIN)?TRUE:FALSE);
 
   if(nwrite == LIBSSH2_ERROR_EAGAIN) {
     *err = CURLE_AGAIN;
@@ -3353,13 +3358,13 @@ static ssize_t scp_recv(struct Curl_easy *data, int sockindex,
 {
   ssize_t nread;
   struct connectdata *conn = data->conn;
+  struct ssh_conn *sshc = &conn->proto.sshc;
   (void)sockindex; /* we only support SCP on the fixed known primary socket */
 
   /* libssh2_channel_read() returns int */
-  nread = (ssize_t)
-    libssh2_channel_read(conn->proto.sshc.ssh_channel, mem, len);
+  nread = (ssize_t) libssh2_channel_read(sshc->ssh_channel, mem, len);
 
-  ssh_block2waitfor(conn, (nread == LIBSSH2_ERROR_EAGAIN)?TRUE:FALSE);
+  ssh_block2waitfor(data, (nread == LIBSSH2_ERROR_EAGAIN)?TRUE:FALSE);
   if(nread == LIBSSH2_ERROR_EAGAIN) {
     *err = CURLE_AGAIN;
     nread = -1;
@@ -3426,14 +3431,15 @@ static CURLcode sftp_disconnect(struct Curl_easy *data,
                                 struct connectdata *conn, bool dead_connection)
 {
   CURLcode result = CURLE_OK;
+  struct ssh_conn *sshc = &conn->proto.sshc;
   (void) dead_connection;
 
   DEBUGF(infof(data, "SSH DISCONNECT starts now\n"));
 
-  if(conn->proto.sshc.ssh_session) {
+  if(sshc->ssh_session) {
     /* only if there's a session still around to use! */
     state(data, SSH_SFTP_SHUTDOWN);
-    result = ssh_block_statemach(data, FALSE);
+    result = ssh_block_statemach(data, conn, FALSE);
   }
 
   DEBUGF(infof(data, "SSH DISCONNECT is done\n"));
@@ -3465,11 +3471,12 @@ static ssize_t sftp_send(struct Curl_easy *data, int sockindex,
 {
   ssize_t nwrite;
   struct connectdata *conn = data->conn;
+  struct ssh_conn *sshc = &conn->proto.sshc;
   (void)sockindex;
 
-  nwrite = libssh2_sftp_write(conn->proto.sshc.sftp_handle, mem, len);
+  nwrite = libssh2_sftp_write(sshc->sftp_handle, mem, len);
 
-  ssh_block2waitfor(conn, (nwrite == LIBSSH2_ERROR_EAGAIN)?TRUE:FALSE);
+  ssh_block2waitfor(data, (nwrite == LIBSSH2_ERROR_EAGAIN)?TRUE:FALSE);
 
   if(nwrite == LIBSSH2_ERROR_EAGAIN) {
     *err = CURLE_AGAIN;
@@ -3492,11 +3499,12 @@ static ssize_t sftp_recv(struct Curl_easy *data, int sockindex,
 {
   ssize_t nread;
   struct connectdata *conn = data->conn;
+  struct ssh_conn *sshc = &conn->proto.sshc;
   (void)sockindex;
 
-  nread = libssh2_sftp_read(conn->proto.sshc.sftp_handle, mem, len);
+  nread = libssh2_sftp_read(sshc->sftp_handle, mem, len);
 
-  ssh_block2waitfor(conn, (nread == LIBSSH2_ERROR_EAGAIN)?TRUE:FALSE);
+  ssh_block2waitfor(data, (nread == LIBSSH2_ERROR_EAGAIN)?TRUE:FALSE);
 
   if(nread == LIBSSH2_ERROR_EAGAIN) {
     *err = CURLE_AGAIN;
diff --git a/lib/vssh/ssh.h b/lib/vssh/ssh.h
index eab2891ce..52e1ee6c2 100644
--- a/lib/vssh/ssh.h
+++ b/lib/vssh/ssh.h
@@ -7,7 +7,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -111,6 +111,17 @@ typedef enum {
    struct. */
 struct SSHPROTO {
   char *path;                  /* the path we operate on */
+#ifdef USE_LIBSSH2
+  struct dynbuf readdir_link;
+  struct dynbuf readdir;
+  char *readdir_filename;
+  char *readdir_longentry;
+
+  LIBSSH2_SFTP_ATTRIBUTES quote_attrs; /* used by the SFTP_QUOTE state */
+
+  /* Here's a set of struct members used by the SFTP_READDIR state */
+  LIBSSH2_SFTP_ATTRIBUTES readdir_attrs;
+#endif
 };
 
 /* ssh_conn is used for struct connection-oriented data in the connectdata
@@ -167,15 +178,6 @@ struct ssh_conn {
   const char *readdir_longentry;
   char *readdir_tmp;
 #elif defined(USE_LIBSSH2)
-  struct dynbuf readdir_link;
-  struct dynbuf readdir;
-  char *readdir_filename;
-  char *readdir_longentry;
-
-  LIBSSH2_SFTP_ATTRIBUTES quote_attrs; /* used by the SFTP_QUOTE state */
-
-  /* Here's a set of struct members used by the SFTP_READDIR state */
-  LIBSSH2_SFTP_ATTRIBUTES readdir_attrs;
   LIBSSH2_SESSION *ssh_session; /* Secure Shell session */
   LIBSSH2_CHANNEL *ssh_channel; /* Secure Shell channel handle */
   LIBSSH2_SFTP *sftp_session;   /* SFTP handle */