diff options
Diffstat (limited to 'source4/rpc_server/remote/dcesrv_remote.c')
| -rw-r--r-- | source4/rpc_server/remote/dcesrv_remote.c | 326 |
1 files changed, 326 insertions, 0 deletions
diff --git a/source4/rpc_server/remote/dcesrv_remote.c b/source4/rpc_server/remote/dcesrv_remote.c new file mode 100644 index 0000000000..cd32160d88 --- /dev/null +++ b/source4/rpc_server/remote/dcesrv_remote.c @@ -0,0 +1,326 @@ +/* + Unix SMB/CIFS implementation. + remote dcerpc operations + + Copyright (C) Stefan (metze) Metzmacher 2004 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include "includes.h" +#include "rpc_server/dcerpc_server.h" +#include "auth/auth.h" +#include "auth/credentials/credentials.h" +#include "librpc/ndr/ndr_table.h" +#include "param/param.h" + + +struct dcesrv_remote_private { + struct dcerpc_pipe *c_pipe; +}; + +static NTSTATUS remote_op_reply(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, void *r) +{ + return NT_STATUS_OK; +} + +static NTSTATUS remote_op_bind(struct dcesrv_call_state *dce_call, const struct dcesrv_interface *iface) +{ + NTSTATUS status; + const struct ndr_interface_table *table; + struct dcesrv_remote_private *private; + const char *binding = lp_parm_string(dce_call->conn->dce_ctx->lp_ctx, NULL, "dcerpc_remote", "binding"); + const char *user, *pass, *domain; + struct cli_credentials *credentials; + bool machine_account; + + machine_account = lp_parm_bool(dce_call->conn->dce_ctx->lp_ctx, NULL, "dcerpc_remote", "use_machine_account", false); + + private = talloc(dce_call->conn, struct dcesrv_remote_private); + if (!private) { + return NT_STATUS_NO_MEMORY; + } + + private->c_pipe = NULL; + dce_call->context->private = private; + + if (!binding) { + DEBUG(0,("You must specify a DCE/RPC binding string\n")); + return NT_STATUS_INVALID_PARAMETER; + } + + user = lp_parm_string(dce_call->conn->dce_ctx->lp_ctx, NULL, "dcerpc_remote", "user"); + pass = lp_parm_string(dce_call->conn->dce_ctx->lp_ctx, NULL, "dcerpc_remote", "password"); + domain = lp_parm_string(dce_call->conn->dce_ctx->lp_ctx, NULL, "dceprc_remote", "domain"); + + table = ndr_table_by_uuid(&iface->syntax_id.uuid); /* FIXME: What about if_version ? */ + if (!table) { + dce_call->fault_code = DCERPC_FAULT_UNK_IF; + return NT_STATUS_NET_WRITE_FAULT; + } + + if (user && pass) { + DEBUG(5, ("dcerpc_remote: RPC Proxy: Using specified account\n")); + credentials = cli_credentials_init(private); + if (!credentials) { + return NT_STATUS_NO_MEMORY; + } + cli_credentials_set_conf(credentials, dce_call->conn->dce_ctx->lp_ctx); + cli_credentials_set_username(credentials, user, CRED_SPECIFIED); + if (domain) { + cli_credentials_set_domain(credentials, domain, CRED_SPECIFIED); + } + cli_credentials_set_password(credentials, pass, CRED_SPECIFIED); + } else if (machine_account) { + DEBUG(5, ("dcerpc_remote: RPC Proxy: Using machine account\n")); + credentials = cli_credentials_init(private); + cli_credentials_set_conf(credentials, dce_call->conn->dce_ctx->lp_ctx); + if (domain) { + cli_credentials_set_domain(credentials, domain, CRED_SPECIFIED); + } + status = cli_credentials_set_machine_account(credentials, dce_call->conn->dce_ctx->lp_ctx); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + } else if (dce_call->conn->auth_state.session_info->credentials) { + DEBUG(5, ("dcerpc_remote: RPC Proxy: Using delegated credentials\n")); + credentials = dce_call->conn->auth_state.session_info->credentials; + } else { + DEBUG(1,("dcerpc_remote: RPC Proxy: You must supply binding, user and password or have delegated credentials\n")); + return NT_STATUS_INVALID_PARAMETER; + } + + status = dcerpc_pipe_connect(private, + &(private->c_pipe), binding, table, + credentials, dce_call->event_ctx, + dce_call->conn->dce_ctx->lp_ctx); + + talloc_free(credentials); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + + return NT_STATUS_OK; +} + +static void remote_op_unbind(struct dcesrv_connection_context *context, const struct dcesrv_interface *iface) +{ + struct dcesrv_remote_private *private = (struct dcesrv_remote_private *)context->private; + + talloc_free(private->c_pipe); + + return; +} + +static NTSTATUS remote_op_ndr_pull(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, struct ndr_pull *pull, void **r) +{ + enum ndr_err_code ndr_err; + const struct ndr_interface_table *table = (const struct ndr_interface_table *)dce_call->context->iface->private; + uint16_t opnum = dce_call->pkt.u.request.opnum; + + dce_call->fault_code = 0; + + if (opnum >= table->num_calls) { + dce_call->fault_code = DCERPC_FAULT_OP_RNG_ERROR; + return NT_STATUS_NET_WRITE_FAULT; + } + + *r = talloc_size(mem_ctx, table->calls[opnum].struct_size); + if (!*r) { + return NT_STATUS_NO_MEMORY; + } + + /* unravel the NDR for the packet */ + ndr_err = table->calls[opnum].ndr_pull(pull, NDR_IN, *r); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + dcerpc_log_packet(table, opnum, NDR_IN, + &dce_call->pkt.u.request.stub_and_verifier); + dce_call->fault_code = DCERPC_FAULT_NDR; + return NT_STATUS_NET_WRITE_FAULT; + } + + return NT_STATUS_OK; +} + +static NTSTATUS remote_op_dispatch(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, void *r) +{ + struct dcesrv_remote_private *private = dce_call->context->private; + uint16_t opnum = dce_call->pkt.u.request.opnum; + const struct ndr_interface_table *table = dce_call->context->iface->private; + const struct ndr_interface_call *call; + const char *name; + + name = table->calls[opnum].name; + call = &table->calls[opnum]; + + if (private->c_pipe->conn->flags & DCERPC_DEBUG_PRINT_IN) { + ndr_print_function_debug(call->ndr_print, name, NDR_IN | NDR_SET_VALUES, r); + } + + private->c_pipe->conn->flags |= DCERPC_NDR_REF_ALLOC; + + /* we didn't use the return code of this function as we only check the last_fault_code */ + dcerpc_ndr_request(private->c_pipe, NULL, table, opnum, mem_ctx,r); + + dce_call->fault_code = private->c_pipe->last_fault_code; + if (dce_call->fault_code != 0) { + DEBUG(0,("dcesrv_remote: call[%s] failed with: %s!\n",name, dcerpc_errstr(mem_ctx, dce_call->fault_code))); + return NT_STATUS_NET_WRITE_FAULT; + } + + if ((dce_call->fault_code == 0) && + (private->c_pipe->conn->flags & DCERPC_DEBUG_PRINT_OUT)) { + ndr_print_function_debug(call->ndr_print, name, NDR_OUT, r); + } + + return NT_STATUS_OK; +} + +static NTSTATUS remote_op_ndr_push(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, struct ndr_push *push, const void *r) +{ + enum ndr_err_code ndr_err; + const struct ndr_interface_table *table = dce_call->context->iface->private; + uint16_t opnum = dce_call->pkt.u.request.opnum; + + /* unravel the NDR for the packet */ + ndr_err = table->calls[opnum].ndr_push(push, NDR_OUT, r); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + dce_call->fault_code = DCERPC_FAULT_NDR; + return NT_STATUS_NET_WRITE_FAULT; + } + + return NT_STATUS_OK; +} + +static NTSTATUS remote_register_one_iface(struct dcesrv_context *dce_ctx, const struct dcesrv_interface *iface) +{ + int i; + const struct ndr_interface_table *table = iface->private; + + for (i=0;i<table->endpoints->count;i++) { + NTSTATUS ret; + const char *name = table->endpoints->names[i]; + + ret = dcesrv_interface_register(dce_ctx, name, iface, NULL); + if (!NT_STATUS_IS_OK(ret)) { + DEBUG(1,("remote_op_init_server: failed to register endpoint '%s'\n",name)); + return ret; + } + } + + return NT_STATUS_OK; +} + +static NTSTATUS remote_op_init_server(struct dcesrv_context *dce_ctx, const struct dcesrv_endpoint_server *ep_server) +{ + int i; + const char **ifaces = str_list_make(dce_ctx, lp_parm_string(dce_ctx->lp_ctx, NULL, "dcerpc_remote", "interfaces"),NULL); + + if (!ifaces) { + DEBUG(3,("remote_op_init_server: no interfaces configured\n")); + return NT_STATUS_OK; + } + + for (i=0;ifaces[i];i++) { + NTSTATUS ret; + struct dcesrv_interface iface; + + if (!ep_server->interface_by_name(&iface, ifaces[i])) { + DEBUG(0,("remote_op_init_server: failed to find interface = '%s'\n", ifaces[i])); + talloc_free(ifaces); + return NT_STATUS_UNSUCCESSFUL; + } + + ret = remote_register_one_iface(dce_ctx, &iface); + if (!NT_STATUS_IS_OK(ret)) { + DEBUG(0,("remote_op_init_server: failed to register interface = '%s'\n", ifaces[i])); + talloc_free(ifaces); + return ret; + } + } + + talloc_free(ifaces); + return NT_STATUS_OK; +} + +static bool remote_fill_interface(struct dcesrv_interface *iface, const struct ndr_interface_table *if_tabl) +{ + iface->name = if_tabl->name; + iface->syntax_id = if_tabl->syntax_id; + + iface->bind = remote_op_bind; + iface->unbind = remote_op_unbind; + + iface->ndr_pull = remote_op_ndr_pull; + iface->dispatch = remote_op_dispatch; + iface->reply = remote_op_reply; + iface->ndr_push = remote_op_ndr_push; + + iface->private = if_tabl; + + return true; +} + +static bool remote_op_interface_by_uuid(struct dcesrv_interface *iface, const struct GUID *uuid, uint32_t if_version) +{ + const struct ndr_interface_list *l; + + for (l=ndr_table_list();l;l=l->next) { + if (l->table->syntax_id.if_version == if_version && + GUID_equal(&l->table->syntax_id.uuid, uuid)==0) { + return remote_fill_interface(iface, l->table); + } + } + + return false; +} + +static bool remote_op_interface_by_name(struct dcesrv_interface *iface, const char *name) +{ + const struct ndr_interface_table *tbl = ndr_table_by_name(name); + + if (tbl) + return remote_fill_interface(iface, tbl); + + return false; +} + +NTSTATUS dcerpc_server_remote_init(void) +{ + NTSTATUS ret; + struct dcesrv_endpoint_server ep_server; + + ZERO_STRUCT(ep_server); + + /* fill in our name */ + ep_server.name = "remote"; + + /* fill in all the operations */ + ep_server.init_server = remote_op_init_server; + + ep_server.interface_by_uuid = remote_op_interface_by_uuid; + ep_server.interface_by_name = remote_op_interface_by_name; + + /* register ourselves with the DCERPC subsystem. */ + ret = dcerpc_register_ep_server(&ep_server); + if (!NT_STATUS_IS_OK(ret)) { + DEBUG(0,("Failed to register 'remote' endpoint server!\n")); + return ret; + } + + /* We need the full DCE/RPC interface table */ + ndr_table_init(); + + return ret; +} |