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/composite/composite.h"
   8 #include "libcli/smb_composite/smb_composite.h"
   9 #include "librpc/gen_ndr/ndr_security.h"
  10
  11 /* the stages of this call */
  12 enum fsinfo_stage {FSINFO_CONNECT, FSINFO_QUERY};
  13
  14
  15 static void fsinfo_raw_handler(struct smbcli_request *req);
  16 static void fsinfo_composite_handler(struct composite_context *c);
  17 static void fsinfo_state_handler(struct composite_context *c);
  18
  19 struct fsinfo_state {
  20         enum fsinfo_stage stage;
  21         struct composite_context *creq;
  22         struct smb_composite_fsinfo *io;
  23         struct smb_composite_connect *connect;
  24         union smb_fsinfo *fsinfo;
  25         struct smbcli_tree *tree;
  26         struct smbcli_request *req;
  27 };
  28
  29 static NTSTATUS fsinfo_connect(struct composite_context *c,
  30                                struct smb_composite_fsinfo *io)
  31 {
  32         NTSTATUS status;
  33         struct fsinfo_state *state;
  34         state = talloc_get_type(c->private_data, struct fsinfo_state);
  35
  36         status = smb_composite_connect_recv(state->creq, c);
  37         NT_STATUS_NOT_OK_RETURN(status);
  38
  39         state->fsinfo = talloc(state, union smb_fsinfo);
  40         NT_STATUS_HAVE_NO_MEMORY(state->fsinfo);
  41
  42         state->fsinfo->generic.level = io->in.level;
  43
  44         state->req = smb_raw_fsinfo_send(state->connect->out.tree,
  45                                          state,
  46                                          state->fsinfo);
  47         NT_STATUS_HAVE_NO_MEMORY(state->req);
  48
  49         state->req->async.private = c;
  50         state->req->async.fn = fsinfo_raw_handler;
  51
  52         state->stage = FSINFO_QUERY;
  53         c->event_ctx = talloc_reference(c, state->req->session->transport->socket->event.ctx);
  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,
 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 {
 131         struct composite_context *c;
 132         struct fsinfo_state *state;
 133
 134         c = talloc_zero(tree, struct composite_context);
 135         if (c == NULL) goto failed;
 136
 137         state = talloc(c, struct fsinfo_state);
 138         if (state == NULL) goto failed;
 139
 140         state->io = io;
 141
 142         state->connect = talloc(state, struct smb_composite_connect);
 143
 144         if (state->connect == NULL) goto failed;
 145
 146         state->connect->in.dest_host    = io->in.dest_host;
 147         state->connect->in.port         = io->in.port;
 148         state->connect->in.called_name  = io->in.called_name;
 149         state->connect->in.service      = io->in.service;
 150         state->connect->in.service_type = io->in.service_type;
 151         state->connect->in.credentials  = io->in.credentials;
 152         state->connect->in.workgroup    = io->in.workgroup;
 153
 154         c->state = COMPOSITE_STATE_IN_PROGRESS;
 155         state->stage = FSINFO_CONNECT;
 156         c->event_ctx = talloc_reference(c,  tree->session->transport->socket->event.ctx);
 157         c->private_data = state;
 158
 159         state->creq = smb_composite_connect_send(state->connect, c->event_ctx);
 160
 161         if (state->creq == NULL) goto failed;
 162
 163         state->creq->async.private_data = c;
 164         state->creq->async.fn = fsinfo_composite_handler;
 165
 166         return c;
 167 failed:
 168         talloc_free(c);
 169         return NULL;
 170 }
 171
 172 /*
 173   composite fsinfo call - recv side
 174 */
 175 NTSTATUS smb_composite_fsinfo_recv(struct composite_context *c, TALLOC_CTX *mem_ctx)
 176 {
 177         NTSTATUS status;
 178
 179         status = composite_wait(c);
 180
 181         if (NT_STATUS_IS_OK(status)) {
 182                 struct fsinfo_state *state = talloc_get_type(c->private_data, struct fsinfo_state);
 183                 talloc_steal(mem_ctx, state->io->out.fsinfo);
 184         }
 185
 186         talloc_free(c);
 187         return status;
 188 }
 189
 190
 191 /*
 192   composite fsinfo call - sync interface
 193 */
 194 NTSTATUS smb_composite_fsinfo(struct smbcli_tree *tree,
 195                               TALLOC_CTX *mem_ctx,
 196                               struct smb_composite_fsinfo *io)
 197 {
 198         struct composite_context *c = smb_composite_fsinfo_send(tree, io);
 199         return smb_composite_fsinfo_recv(c, mem_ctx);
 200 }
 201