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