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 async_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 async_req *result;
 113         struct tevent_req *subreq;
 114         struct rpc_sock_write_state *state;
 115
 116         if (!async_req_setup(mem_ctx, &result, &state,
 117                              struct rpc_sock_write_state)) {
 118                 return NULL;
 119         }
 120         subreq = async_send_send(state, ev, sock_transp->fd, data, size, 0);
 121         if (subreq == NULL) {
 122                 goto fail;
 123         }
 124         tevent_req_set_callback(subreq, rpc_sock_write_done, result);
 125         return result;
 126  fail:
 127         TALLOC_FREE(result);
 128         return NULL;
 129 }
 130
 131 static void rpc_sock_write_done(struct tevent_req *subreq)
 132 {
 133         struct async_req *req =
 134                 tevent_req_callback_data(subreq, struct async_req);
 135         struct rpc_sock_write_state *state = talloc_get_type_abort(
 136                 req->private_data, struct rpc_sock_write_state);
 137         int err;
 138
 139         state->sent = async_send_recv(subreq, &err);
 140         if (state->sent == -1) {
 141                 async_req_nterror(req, map_nt_error_from_unix(err));
 142                 return;
 143         }
 144         async_req_done(req);
 145 }
 146
 147 static NTSTATUS rpc_sock_write_recv(struct async_req *req, ssize_t *psent)
 148 {
 149         struct rpc_sock_write_state *state = talloc_get_type_abort(
 150                 req->private_data, struct rpc_sock_write_state);
 151         NTSTATUS status;
 152
 153         if (async_req_is_nterror(req, &status)) {
 154                 return status;
 155         }
 156         *psent = state->sent;
 157         return NT_STATUS_OK;
 158 }
 159
 160 NTSTATUS rpc_transport_sock_init(TALLOC_CTX *mem_ctx, int fd,
 161                                  struct rpc_cli_transport **presult)
 162 {
 163         struct rpc_cli_transport *result;
 164         struct rpc_transport_sock_state *state;
 165
 166         result = talloc(mem_ctx, struct rpc_cli_transport);
 167         if (result == NULL) {
 168                 return NT_STATUS_NO_MEMORY;
 169         }
 170         state = talloc(result, struct rpc_transport_sock_state);
 171         if (state == NULL) {
 172                 TALLOC_FREE(result);
 173                 return NT_STATUS_NO_MEMORY;
 174         }
 175         result->priv = state;
 176
 177         state->fd = fd;
 178         talloc_set_destructor(state, rpc_transport_sock_state_destructor);
 179
 180         result->trans_send = NULL;
 181         result->trans_recv = NULL;
 182         result->write_send = rpc_sock_write_send;
 183         result->write_recv = rpc_sock_write_recv;
 184         result->read_send = rpc_sock_read_send;
 185         result->read_recv = rpc_sock_read_recv;
 186
 187         *presult = result;
 188         return NT_STATUS_OK;
 189 }