source3/rpc_client/rpc_transport_sock.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  RPC client transport over a socket
   4  *  Copyright (C) Volker Lendecke 2009
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "includes.h"
  21
  22 #undef DBGC_CLASS
  23 #define DBGC_CLASS DBGC_RPC_CLI
  24
  25 struct rpc_transport_sock_state {
  26         int fd;
  27         int timeout;
  28 };
  29
  30 static int rpc_transport_sock_state_destructor(struct rpc_transport_sock_state *s)
  31 {
  32         if (s->fd != -1) {
  33                 close(s->fd);
  34                 s->fd = -1;
  35         }
  36         return 0;
  37 }
  38
  39 struct rpc_sock_read_state {
  40         struct rpc_transport_sock_state *transp;
  41         ssize_t received;
  42 };
  43
  44 static void rpc_sock_read_done(struct tevent_req *subreq);
  45
  46 static struct tevent_req *rpc_sock_read_send(TALLOC_CTX *mem_ctx,
  47                                              struct event_context *ev,
  48                                              uint8_t *data, size_t size,
  49                                              void *priv)
  50 {
  51         struct rpc_transport_sock_state *sock_transp = talloc_get_type_abort(
  52                 priv, struct rpc_transport_sock_state);
  53         struct tevent_req *req, *subreq;
  54         struct rpc_sock_read_state *state;
  55         struct timeval endtime;
  56
  57         req = tevent_req_create(mem_ctx, &state, struct rpc_sock_read_state);
  58         if (req == NULL) {
  59                 return NULL;
  60         }
  61         if (sock_transp->fd == -1) {
  62                 tevent_req_nterror(req, NT_STATUS_CONNECTION_INVALID);
  63                 return tevent_req_post(req, ev);
  64         }
  65         state->transp = sock_transp;
  66         endtime = timeval_current_ofs(0, sock_transp->timeout * 1000);
  67         subreq = async_recv_send(state, ev, sock_transp->fd, data, size, 0);
  68         if (subreq == NULL) {
  69                 goto fail;
  70         }
  71
  72         if (!tevent_req_set_endtime(subreq, ev, endtime)) {
  73                 goto fail;
  74         }
  75
  76         tevent_req_set_callback(subreq, rpc_sock_read_done, req);
  77         return req;
  78  fail:
  79         TALLOC_FREE(req);
  80         return NULL;
  81 }
  82
  83 static void rpc_sock_read_done(struct tevent_req *subreq)
  84 {
  85         struct tevent_req *req = tevent_req_callback_data(
  86                 subreq, struct tevent_req);
  87         struct rpc_sock_read_state *state = tevent_req_data(
  88                 req, struct rpc_sock_read_state);
  89         int err;
  90
  91         /* We must free subreq in this function as there is
  92           a timer event attached to it. */
  93
  94         state->received = async_recv_recv(subreq, &err);
  95
  96         if (state->received == -1) {
  97                 if (state->transp->fd != -1) {
  98                         close(state->transp->fd);
  99                         state->transp->fd = -1;
 100                 }
 101                 TALLOC_FREE(subreq);
 102                 tevent_req_nterror(req, map_nt_error_from_unix(err));
 103                 return;
 104         }
 105         TALLOC_FREE(subreq);
 106         tevent_req_done(req);
 107 }
 108
 109 static NTSTATUS rpc_sock_read_recv(struct tevent_req *req, ssize_t *preceived)
 110 {
 111         struct rpc_sock_read_state *state = tevent_req_data(
 112                 req, struct rpc_sock_read_state);
 113         NTSTATUS status;
 114
 115         if (tevent_req_is_nterror(req, &status)) {
 116                 return status;
 117         }
 118         *preceived = state->received;
 119         return NT_STATUS_OK;
 120 }
 121
 122 struct rpc_sock_write_state {
 123         struct rpc_transport_sock_state *transp;
 124         ssize_t sent;
 125 };
 126
 127 static void rpc_sock_write_done(struct tevent_req *subreq);
 128
 129 static struct tevent_req *rpc_sock_write_send(TALLOC_CTX *mem_ctx,
 130                                               struct event_context *ev,
 131                                               const uint8_t *data, size_t size,
 132                                               void *priv)
 133 {
 134         struct rpc_transport_sock_state *sock_transp = talloc_get_type_abort(
 135                 priv, struct rpc_transport_sock_state);
 136         struct tevent_req *req, *subreq;
 137         struct rpc_sock_write_state *state;
 138         struct timeval endtime;
 139
 140         req = tevent_req_create(mem_ctx, &state, struct rpc_sock_write_state);
 141         if (req == NULL) {
 142                 return NULL;
 143         }
 144         if (sock_transp->fd == -1) {
 145                 tevent_req_nterror(req, NT_STATUS_CONNECTION_INVALID);
 146                 return tevent_req_post(req, ev);
 147         }
 148         state->transp = sock_transp;
 149         endtime = timeval_current_ofs(0, sock_transp->timeout * 1000);
 150         subreq = async_send_send(state, ev, sock_transp->fd, data, size, 0);
 151         if (subreq == NULL) {
 152                 goto fail;
 153         }
 154
 155         if (!tevent_req_set_endtime(subreq, ev, endtime)) {
 156                 goto fail;
 157         }
 158
 159         tevent_req_set_callback(subreq, rpc_sock_write_done, req);
 160         return req;
 161  fail:
 162         TALLOC_FREE(req);
 163         return NULL;
 164 }
 165
 166 static void rpc_sock_write_done(struct tevent_req *subreq)
 167 {
 168         struct tevent_req *req = tevent_req_callback_data(
 169                 subreq, struct tevent_req);
 170         struct rpc_sock_write_state *state = tevent_req_data(
 171                 req, struct rpc_sock_write_state);
 172         int err;
 173
 174         /* We must free subreq in this function as there is
 175           a timer event attached to it. */
 176
 177         state->sent = async_send_recv(subreq, &err);
 178
 179         if (state->sent == -1) {
 180                 if (state->transp->fd != -1) {
 181                         close(state->transp->fd);
 182                         state->transp->fd = -1;
 183                 }
 184                 TALLOC_FREE(subreq);
 185                 tevent_req_nterror(req, map_nt_error_from_unix(err));
 186                 return;
 187         }
 188         TALLOC_FREE(subreq);
 189         tevent_req_done(req);
 190 }
 191
 192 static NTSTATUS rpc_sock_write_recv(struct tevent_req *req, ssize_t *psent)
 193 {
 194         struct rpc_sock_write_state *state = tevent_req_data(
 195                 req, struct rpc_sock_write_state);
 196         NTSTATUS status;
 197
 198         if (tevent_req_is_nterror(req, &status)) {
 199                 return status;
 200         }
 201         *psent = state->sent;
 202         return NT_STATUS_OK;
 203 }
 204
 205 NTSTATUS rpc_transport_sock_init(TALLOC_CTX *mem_ctx, int fd,
 206                                  struct rpc_cli_transport **presult)
 207 {
 208         struct rpc_cli_transport *result;
 209         struct rpc_transport_sock_state *state;
 210
 211         result = talloc(mem_ctx, struct rpc_cli_transport);
 212         if (result == NULL) {
 213                 return NT_STATUS_NO_MEMORY;
 214         }
 215         state = talloc(result, struct rpc_transport_sock_state);
 216         if (state == NULL) {
 217                 TALLOC_FREE(result);
 218                 return NT_STATUS_NO_MEMORY;
 219         }
 220         result->priv = state;
 221
 222         state->fd = fd;
 223         state->timeout = 10000; /* 10 seconds. */
 224         talloc_set_destructor(state, rpc_transport_sock_state_destructor);
 225
 226         result->trans_send = NULL;
 227         result->trans_recv = NULL;
 228         result->write_send = rpc_sock_write_send;
 229         result->write_recv = rpc_sock_write_recv;
 230         result->read_send = rpc_sock_read_send;
 231         result->read_recv = rpc_sock_read_recv;
 232
 233         *presult = result;
 234         return NT_STATUS_OK;
 235 }
 236
 237 int rpccli_set_sock_timeout(struct rpc_pipe_client *cli, int timeout)
 238 {
 239         struct rpc_transport_sock_state *state = talloc_get_type(cli->transport->priv,
 240                                                         struct rpc_transport_sock_state);
 241         int orig_timeout;
 242         if (!state) {
 243                 return 0;
 244         }
 245         orig_timeout = state->timeout;
 246         state->timeout = timeout;
 247         return orig_timeout;
 248 }
 249
 250 void rpccli_close_sock_fd(struct rpc_pipe_client *cli)
 251 {
 252         struct rpc_transport_sock_state *state = talloc_get_type(cli->transport->priv,
 253                                                         struct rpc_transport_sock_state);
 254         if (state) {
 255                 if (state->fd != -1) {
 256                         close(state->fd);
 257                         state->fd = -1;
 258                 }
 259         }
 260         return;
 261 }
 262
 263 bool rpc_pipe_tcp_connection_ok(struct rpc_pipe_client *cli)
 264 {
 265         struct rpc_transport_sock_state *state = talloc_get_type(cli->transport->priv,
 266                                                         struct rpc_transport_sock_state);
 267         if (state && state->fd != -1) {
 268                 return true;
 269         }
 270
 271         return false;
 272 }