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         state->received = async_recv_recv(subreq, &err);
  92         if (state->received == -1) {
  93                 if (state->transp->fd != -1) {
  94                         close(state->transp->fd);
  95                         state->transp->fd = -1;
  96                 }
  97                 tevent_req_nterror(req, map_nt_error_from_unix(err));
  98                 return;
  99         }
 100         tevent_req_done(req);
 101 }
 102
 103 static NTSTATUS rpc_sock_read_recv(struct tevent_req *req, ssize_t *preceived)
 104 {
 105         struct rpc_sock_read_state *state = tevent_req_data(
 106                 req, struct rpc_sock_read_state);
 107         NTSTATUS status;
 108
 109         if (tevent_req_is_nterror(req, &status)) {
 110                 return status;
 111         }
 112         *preceived = state->received;
 113         return NT_STATUS_OK;
 114 }
 115
 116 struct rpc_sock_write_state {
 117         struct rpc_transport_sock_state *transp;
 118         ssize_t sent;
 119 };
 120
 121 static void rpc_sock_write_done(struct tevent_req *subreq);
 122
 123 static struct tevent_req *rpc_sock_write_send(TALLOC_CTX *mem_ctx,
 124                                               struct event_context *ev,
 125                                               const uint8_t *data, size_t size,
 126                                               void *priv)
 127 {
 128         struct rpc_transport_sock_state *sock_transp = talloc_get_type_abort(
 129                 priv, struct rpc_transport_sock_state);
 130         struct tevent_req *req, *subreq;
 131         struct rpc_sock_write_state *state;
 132         struct timeval endtime;
 133
 134         req = tevent_req_create(mem_ctx, &state, struct rpc_sock_write_state);
 135         if (req == NULL) {
 136                 return NULL;
 137         }
 138         if (sock_transp->fd == -1) {
 139                 tevent_req_nterror(req, NT_STATUS_CONNECTION_INVALID);
 140                 return tevent_req_post(req, ev);
 141         }
 142         state->transp = sock_transp;
 143         endtime = timeval_current_ofs(0, sock_transp->timeout * 1000);
 144         subreq = async_send_send(state, ev, sock_transp->fd, data, size, 0);
 145         if (subreq == NULL) {
 146                 goto fail;
 147         }
 148
 149         if (!tevent_req_set_endtime(subreq, ev, endtime)) {
 150                 goto fail;
 151         }
 152
 153         tevent_req_set_callback(subreq, rpc_sock_write_done, req);
 154         return req;
 155  fail:
 156         TALLOC_FREE(req);
 157         return NULL;
 158 }
 159
 160 static void rpc_sock_write_done(struct tevent_req *subreq)
 161 {
 162         struct tevent_req *req = tevent_req_callback_data(
 163                 subreq, struct tevent_req);
 164         struct rpc_sock_write_state *state = tevent_req_data(
 165                 req, struct rpc_sock_write_state);
 166         int err;
 167
 168         state->sent = async_send_recv(subreq, &err);
 169         if (state->sent == -1) {
 170                 if (state->transp->fd != -1) {
 171                         close(state->transp->fd);
 172                         state->transp->fd = -1;
 173                 }
 174                 tevent_req_nterror(req, map_nt_error_from_unix(err));
 175                 return;
 176         }
 177         tevent_req_done(req);
 178 }
 179
 180 static NTSTATUS rpc_sock_write_recv(struct tevent_req *req, ssize_t *psent)
 181 {
 182         struct rpc_sock_write_state *state = tevent_req_data(
 183                 req, struct rpc_sock_write_state);
 184         NTSTATUS status;
 185
 186         if (tevent_req_is_nterror(req, &status)) {
 187                 return status;
 188         }
 189         *psent = state->sent;
 190         return NT_STATUS_OK;
 191 }
 192
 193 NTSTATUS rpc_transport_sock_init(TALLOC_CTX *mem_ctx, int fd,
 194                                  struct rpc_cli_transport **presult)
 195 {
 196         struct rpc_cli_transport *result;
 197         struct rpc_transport_sock_state *state;
 198
 199         result = talloc(mem_ctx, struct rpc_cli_transport);
 200         if (result == NULL) {
 201                 return NT_STATUS_NO_MEMORY;
 202         }
 203         state = talloc(result, struct rpc_transport_sock_state);
 204         if (state == NULL) {
 205                 TALLOC_FREE(result);
 206                 return NT_STATUS_NO_MEMORY;
 207         }
 208         result->priv = state;
 209
 210         state->fd = fd;
 211         state->timeout = 10000; /* 10 seconds. */
 212         talloc_set_destructor(state, rpc_transport_sock_state_destructor);
 213
 214         result->trans_send = NULL;
 215         result->trans_recv = NULL;
 216         result->write_send = rpc_sock_write_send;
 217         result->write_recv = rpc_sock_write_recv;
 218         result->read_send = rpc_sock_read_send;
 219         result->read_recv = rpc_sock_read_recv;
 220
 221         *presult = result;
 222         return NT_STATUS_OK;
 223 }
 224
 225 int rpccli_set_sock_timeout(struct rpc_pipe_client *cli, int timeout)
 226 {
 227         struct rpc_transport_sock_state *state = talloc_get_type(cli->transport->priv,
 228                                                         struct rpc_transport_sock_state);
 229         int orig_timeout;
 230         if (!state) {
 231                 return 0;
 232         }
 233         orig_timeout = state->timeout;
 234         state->timeout = timeout;
 235         return orig_timeout;
 236 }
 237
 238 void rpccli_close_sock_fd(struct rpc_pipe_client *cli)
 239 {
 240         struct rpc_transport_sock_state *state = talloc_get_type(cli->transport->priv,
 241                                                         struct rpc_transport_sock_state);
 242         if (state) {
 243                 if (state->fd != -1) {
 244                         close(state->fd);
 245                         state->fd = -1;
 246                 }
 247         }
 248         return;
 249 }
 250
 251 bool rpc_pipe_tcp_connection_ok(struct rpc_pipe_client *cli)
 252 {
 253         struct rpc_transport_sock_state *state = talloc_get_type(cli->transport->priv,
 254                                                         struct rpc_transport_sock_state);
 255         if (state && state->fd != -1) {
 256                 return true;
 257         }
 258
 259         return false;
 260 }