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