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