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 };
  28
  29 static int rpc_transport_sock_state_destructor(struct rpc_transport_sock_state *s)
  30 {
  31         if (s->fd != -1) {
  32                 close(s->fd);
  33                 s->fd = -1;
  34         }
  35         return 0;
  36 }
  37
  38 struct rpc_sock_read_state {
  39         ssize_t received;
  40 };
  41
  42 static void rpc_sock_read_done(struct tevent_req *subreq);
  43
  44 static struct async_req *rpc_sock_read_send(TALLOC_CTX *mem_ctx,
  45                                             struct event_context *ev,
  46                                             uint8_t *data, size_t size,
  47                                             void *priv)
  48 {
  49         struct rpc_transport_sock_state *sock_transp = talloc_get_type_abort(
  50                 priv, struct rpc_transport_sock_state);
  51         struct async_req *result;
  52         struct tevent_req *subreq;
  53         struct rpc_sock_read_state *state;
  54
  55         if (!async_req_setup(mem_ctx, &result, &state,
  56                              struct rpc_sock_read_state)) {
  57                 return NULL;
  58         }
  59
  60         subreq = async_recv_send(state, ev, sock_transp->fd, data, size, 0);
  61         if (subreq == NULL) {
  62                 goto fail;
  63         }
  64         tevent_req_set_callback(subreq, rpc_sock_read_done, result);
  65         return result;
  66  fail:
  67         TALLOC_FREE(result);
  68         return NULL;
  69 }
  70
  71 static void rpc_sock_read_done(struct tevent_req *subreq)
  72 {
  73         struct async_req *req =
  74                 tevent_req_callback_data(subreq, struct async_req);
  75         struct rpc_sock_read_state *state = talloc_get_type_abort(
  76                 req->private_data, struct rpc_sock_read_state);
  77         int err;
  78
  79         state->received = async_recv_recv(subreq, &err);
  80         if (state->received == -1) {
  81                 async_req_nterror(req, map_nt_error_from_unix(err));
  82                 return;
  83         }
  84         async_req_done(req);
  85 }
  86
  87 static NTSTATUS rpc_sock_read_recv(struct async_req *req, ssize_t *preceived)
  88 {
  89         struct rpc_sock_read_state *state = talloc_get_type_abort(
  90                 req->private_data, struct rpc_sock_read_state);
  91         NTSTATUS status;
  92
  93         if (async_req_is_nterror(req, &status)) {
  94                 return status;
  95         }
  96         *preceived = state->received;
  97         return NT_STATUS_OK;
  98 }
  99
 100 struct rpc_sock_write_state {
 101         ssize_t sent;
 102 };
 103
 104 static void rpc_sock_write_done(struct tevent_req *subreq);
 105
 106 static struct async_req *rpc_sock_write_send(TALLOC_CTX *mem_ctx,
 107                                              struct event_context *ev,
 108                                              const uint8_t *data, size_t size,
 109                                              void *priv)
 110 {
 111         struct rpc_transport_sock_state *sock_transp = talloc_get_type_abort(
 112                 priv, struct rpc_transport_sock_state);
 113         struct async_req *result;
 114         struct tevent_req *subreq;
 115         struct rpc_sock_write_state *state;
 116
 117         if (!async_req_setup(mem_ctx, &result, &state,
 118                              struct rpc_sock_write_state)) {
 119                 return NULL;
 120         }
 121         subreq = async_send_send(state, ev, sock_transp->fd, data, size, 0);
 122         if (subreq == NULL) {
 123                 goto fail;
 124         }
 125         tevent_req_set_callback(subreq, rpc_sock_write_done, result);
 126         return result;
 127  fail:
 128         TALLOC_FREE(result);
 129         return NULL;
 130 }
 131
 132 static void rpc_sock_write_done(struct tevent_req *subreq)
 133 {
 134         struct async_req *req =
 135                 tevent_req_callback_data(subreq, struct async_req);
 136         struct rpc_sock_write_state *state = talloc_get_type_abort(
 137                 req->private_data, struct rpc_sock_write_state);
 138         int err;
 139
 140         state->sent = async_send_recv(subreq, &err);
 141         if (state->sent == -1) {
 142                 async_req_nterror(req, map_nt_error_from_unix(err));
 143                 return;
 144         }
 145         async_req_done(req);
 146 }
 147
 148 static NTSTATUS rpc_sock_write_recv(struct async_req *req, ssize_t *psent)
 149 {
 150         struct rpc_sock_write_state *state = talloc_get_type_abort(
 151                 req->private_data, struct rpc_sock_write_state);
 152         NTSTATUS status;
 153
 154         if (async_req_is_nterror(req, &status)) {
 155                 return status;
 156         }
 157         *psent = state->sent;
 158         return NT_STATUS_OK;
 159 }
 160
 161 NTSTATUS rpc_transport_sock_init(TALLOC_CTX *mem_ctx, int fd,
 162                                  struct rpc_cli_transport **presult)
 163 {
 164         struct rpc_cli_transport *result;
 165         struct rpc_transport_sock_state *state;
 166
 167         result = talloc(mem_ctx, struct rpc_cli_transport);
 168         if (result == NULL) {
 169                 return NT_STATUS_NO_MEMORY;
 170         }
 171         state = talloc(result, struct rpc_transport_sock_state);
 172         if (state == NULL) {
 173                 TALLOC_FREE(result);
 174                 return NT_STATUS_NO_MEMORY;
 175         }
 176         result->priv = state;
 177
 178         state->fd = fd;
 179         talloc_set_destructor(state, rpc_transport_sock_state_destructor);
 180
 181         result->trans_send = NULL;
 182         result->trans_recv = NULL;
 183         result->write_send = rpc_sock_write_send;
 184         result->write_recv = rpc_sock_write_recv;
 185         result->read_send = rpc_sock_read_send;
 186         result->read_recv = rpc_sock_read_recv;
 187
 188         *presult = result;
 189         return NT_STATUS_OK;
 190 }