source4/libcli/smb_composite/fsinfo.c

   1 /*
   2   a composite API for quering file system information
   3 */
   4
   5 #include "includes.h"
   6 #include "libcli/raw/libcliraw.h"
   7 #include "libcli/raw/raw_proto.h"
   8 #include "libcli/composite/composite.h"
   9 #include "libcli/smb_composite/smb_composite.h"
  10 #include "libcli/resolve/resolve.h"
  11
  12 /* the stages of this call */
  13 enum fsinfo_stage {FSINFO_CONNECT, FSINFO_QUERY};
  14
  15
  16 static void fsinfo_raw_handler(struct smbcli_request *req);
  17 static void fsinfo_composite_handler(struct composite_context *c);
  18 static void fsinfo_state_handler(struct composite_context *c);
  19
  20 struct fsinfo_state {
  21         enum fsinfo_stage stage;
  22         struct composite_context *creq;
  23         struct smb_composite_fsinfo *io;
  24         struct smb_composite_connect *connect;
  25         union smb_fsinfo *fsinfo;
  26         struct smbcli_tree *tree;
  27         struct smbcli_request *req;
  28 };
  29
  30 static NTSTATUS fsinfo_connect(struct composite_context *c,
  31                                struct smb_composite_fsinfo *io)
  32 {
  33         NTSTATUS status;
  34         struct fsinfo_state *state;
  35         state = talloc_get_type(c->private_data, struct fsinfo_state);
  36
  37         status = smb_composite_connect_recv(state->creq, c);
  38         NT_STATUS_NOT_OK_RETURN(status);
  39
  40         state->fsinfo = talloc(state, union smb_fsinfo);
  41         NT_STATUS_HAVE_NO_MEMORY(state->fsinfo);
  42
  43         state->fsinfo->generic.level = io->in.level;
  44
  45         state->req = smb_raw_fsinfo_send(state->connect->out.tree,
  46                                          state,
  47                                          state->fsinfo);
  48         NT_STATUS_HAVE_NO_MEMORY(state->req);
  49
  50         state->req->async.private_data = c;
  51         state->req->async.fn = fsinfo_raw_handler;
  52
  53         state->stage = FSINFO_QUERY;
  54
  55         return NT_STATUS_OK;
  56 }
  57
  58 static NTSTATUS fsinfo_query(struct composite_context *c,
  59                                struct smb_composite_fsinfo *io)
  60 {
  61         NTSTATUS status;
  62         struct fsinfo_state *state;
  63         state = talloc_get_type(c->private_data, struct fsinfo_state);
  64
  65         status = smb_raw_fsinfo_recv(state->req, state, state->fsinfo);
  66         NT_STATUS_NOT_OK_RETURN(status);
  67
  68         state->io->out.fsinfo = state->fsinfo;
  69
  70         c->state = COMPOSITE_STATE_DONE;
  71
  72         if (c->async.fn)
  73                 c->async.fn(c);
  74
  75         return NT_STATUS_OK;
  76
  77 }
  78
  79 /*
  80   handler for completion of a sub-request in fsinfo
  81 */
  82 static void fsinfo_state_handler(struct composite_context *creq)
  83 {
  84         struct fsinfo_state *state = talloc_get_type(creq->private_data, struct fsinfo_state);
  85
  86         /* when this handler is called, the stage indicates what
  87            call has just finished */
  88         switch (state->stage) {
  89         case FSINFO_CONNECT:
  90                 creq->status = fsinfo_connect(creq, state->io);
  91                 break;
  92
  93         case FSINFO_QUERY:
  94                 creq->status = fsinfo_query(creq, state->io);
  95                 break;
  96         }
  97
  98         if (!NT_STATUS_IS_OK(creq->status)) {
  99                 creq->state = COMPOSITE_STATE_ERROR;
 100         }
 101
 102         if (creq->state >= COMPOSITE_STATE_DONE && creq->async.fn) {
 103                 creq->async.fn(creq);
 104         }
 105 }
 106
 107 /*
 108    As raw and composite handlers take different requests, we need to handlers
 109    to adapt both for the same state machine in fsinfo_state_handler()
 110 */
 111 static void fsinfo_raw_handler(struct smbcli_request *req)
 112 {
 113         struct composite_context *c = talloc_get_type(req->async.private_data,
 114                                                       struct composite_context);
 115         fsinfo_state_handler(c);
 116 }
 117
 118 static void fsinfo_composite_handler(struct composite_context *creq)
 119 {
 120         struct composite_context *c = talloc_get_type(creq->async.private_data,
 121                                                       struct composite_context);
 122         fsinfo_state_handler(c);
 123 }
 124
 125 /*
 126   composite fsinfo call - connects to a tree and queries a file system information
 127 */
 128 struct composite_context *smb_composite_fsinfo_send(struct smbcli_tree *tree,
 129                                                     struct smb_composite_fsinfo *io,
 130                                                     struct resolve_context *resolve_ctx,
 131                                                     struct tevent_context *event_ctx)
 132 {
 133         struct composite_context *c;
 134         struct fsinfo_state *state;
 135
 136         c = talloc_zero(tree, struct composite_context);
 137         if (c == NULL) goto failed;
 138
 139         c->event_ctx = event_ctx;
 140         if (c->event_ctx == NULL) goto failed;
 141
 142         state = talloc(c, struct fsinfo_state);
 143         if (state == NULL) goto failed;
 144
 145         state->io = io;
 146
 147         state->connect = talloc_zero(state, struct smb_composite_connect);
 148
 149         if (state->connect == NULL) goto failed;
 150
 151         state->connect->in.dest_host    = io->in.dest_host;
 152         state->connect->in.dest_ports   = io->in.dest_ports;
 153         state->connect->in.socket_options = io->in.socket_options;
 154         state->connect->in.called_name  = io->in.called_name;
 155         state->connect->in.service      = io->in.service;
 156         state->connect->in.service_type = io->in.service_type;
 157         state->connect->in.credentials  = io->in.credentials;
 158         state->connect->in.fallback_to_anonymous = false;
 159         state->connect->in.workgroup    = io->in.workgroup;
 160         state->connect->in.gensec_settings = io->in.gensec_settings;
 161
 162         state->connect->in.options = tree->session->transport->options;
 163         state->connect->in.session_options = tree->session->options;
 164
 165         c->state = COMPOSITE_STATE_IN_PROGRESS;
 166         state->stage = FSINFO_CONNECT;
 167         c->private_data = state;
 168
 169         state->creq = smb_composite_connect_send(state->connect, state,
 170                          resolve_ctx, c->event_ctx);
 171
 172         if (state->creq == NULL) goto failed;
 173
 174         state->creq->async.private_data = c;
 175         state->creq->async.fn = fsinfo_composite_handler;
 176
 177         return c;
 178 failed:
 179         talloc_free(c);
 180         return NULL;
 181 }
 182
 183 /*
 184   composite fsinfo call - recv side
 185 */
 186 NTSTATUS smb_composite_fsinfo_recv(struct composite_context *c, TALLOC_CTX *mem_ctx)
 187 {
 188         NTSTATUS status;
 189
 190         status = composite_wait(c);
 191
 192         if (NT_STATUS_IS_OK(status)) {
 193                 struct fsinfo_state *state = talloc_get_type(c->private_data, struct fsinfo_state);
 194                 talloc_steal(mem_ctx, state->io->out.fsinfo);
 195         }
 196
 197         talloc_free(c);
 198         return status;
 199 }
 200
 201
 202 /*
 203   composite fsinfo call - sync interface
 204 */
 205 NTSTATUS smb_composite_fsinfo(struct smbcli_tree *tree,
 206                               TALLOC_CTX *mem_ctx,
 207                               struct smb_composite_fsinfo *io,
 208                               struct resolve_context *resolve_ctx,
 209                               struct tevent_context *ev)
 210 {
 211         struct composite_context *c = smb_composite_fsinfo_send(tree, io, resolve_ctx, ev);
 212         return smb_composite_fsinfo_recv(c, mem_ctx);
 213 }
 214