diff options
Diffstat (limited to 'source3/winbindd/wb_dsgetdcname.c')
| -rw-r--r-- | source3/winbindd/wb_dsgetdcname.c | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/source3/winbindd/wb_dsgetdcname.c b/source3/winbindd/wb_dsgetdcname.c new file mode 100644 index 0000000..ab9be5b --- /dev/null +++ b/source3/winbindd/wb_dsgetdcname.c @@ -0,0 +1,246 @@ +/* + Unix SMB/CIFS implementation. + async dsgetdcname + Copyright (C) Volker Lendecke 2009 + + 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 "winbindd.h" +#include "librpc/gen_ndr/ndr_winbind_c.h" +#include "librpc/gen_ndr/ndr_netlogon.h" +#include "lib/gencache.h" + +struct wb_dsgetdcname_state { + struct netr_DsRGetDCNameInfo *dcinfo; +}; + +static void wb_dsgetdcname_done(struct tevent_req *subreq); + +struct tevent_req *wb_dsgetdcname_send(TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + const char *domain_name, + const struct GUID *domain_guid, + const char *site_name, + uint32_t flags) +{ + struct tevent_req *req, *subreq; + struct wb_dsgetdcname_state *state; + struct dcerpc_binding_handle *child_binding_handle = NULL; + struct GUID guid; + struct GUID *guid_ptr = NULL; + + req = tevent_req_create(mem_ctx, &state, struct wb_dsgetdcname_state); + if (req == NULL) { + return NULL; + } + + D_INFO("WB command dsgetdcname start.\n" + "Search domain name %s and site name %s.\n", + domain_name, + site_name); + if (strequal(domain_name, "BUILTIN")) { + /* + * This makes no sense + */ + tevent_req_nterror(req, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND); + return tevent_req_post(req, ev); + } + + if (strequal(domain_name, get_global_sam_name())) { + int role = lp_server_role(); + if ( role != ROLE_ACTIVE_DIRECTORY_DC ) { + /* + * Two options here: Give back our own address, or say there's + * nobody around. Right now opting for the latter, one measure + * to prevent the loopback connects. This might change if + * needed. + */ + tevent_req_nterror(req, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND); + return tevent_req_post(req, ev); + } + } + + if (IS_DC) { + /* + * We have to figure out the DC ourselves + */ + child_binding_handle = locator_child_handle(); + } else { + struct winbindd_domain *domain = find_our_domain(); + child_binding_handle = dom_child_handle(domain); + } + + if (domain_guid != NULL) { + /* work around a const issue in rpccli_ autogenerated code */ + guid = *domain_guid; + guid_ptr = &guid; + } + + subreq = dcerpc_wbint_DsGetDcName_send( + state, ev, child_binding_handle, domain_name, guid_ptr, site_name, + flags, &state->dcinfo); + if (tevent_req_nomem(subreq, req)) { + return tevent_req_post(req, ev); + } + tevent_req_set_callback(subreq, wb_dsgetdcname_done, req); + return req; +} + +static void wb_dsgetdcname_done(struct tevent_req *subreq) +{ + struct tevent_req *req = tevent_req_callback_data( + subreq, struct tevent_req); + struct wb_dsgetdcname_state *state = tevent_req_data( + req, struct wb_dsgetdcname_state); + NTSTATUS status, result; + + status = dcerpc_wbint_DsGetDcName_recv(subreq, state, &result); + TALLOC_FREE(subreq); + if (any_nt_status_not_ok(status, result, &status)) { + tevent_req_nterror(req, status); + return; + } + tevent_req_done(req); +} + +NTSTATUS wb_dsgetdcname_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx, + struct netr_DsRGetDCNameInfo **pdcinfo) +{ + struct wb_dsgetdcname_state *state = tevent_req_data( + req, struct wb_dsgetdcname_state); + NTSTATUS status; + + D_INFO("WB command dsgetdcname end.\n"); + if (tevent_req_is_nterror(req, &status)) { + D_WARNING("Failed with %s.\n", nt_errstr(status)); + return status; + } + *pdcinfo = talloc_move(mem_ctx, &state->dcinfo); + return NT_STATUS_OK; +} + +NTSTATUS wb_dsgetdcname_gencache_set(const char *domname, + struct netr_DsRGetDCNameInfo *dcinfo) +{ + DATA_BLOB blob; + enum ndr_err_code ndr_err; + char *key; + bool ok; + + key = talloc_asprintf_strupper_m(talloc_tos(), "DCINFO/%s", domname); + if (key == NULL) { + return NT_STATUS_NO_MEMORY; + } + + if (DEBUGLEVEL >= 10) { + NDR_PRINT_DEBUG(netr_DsRGetDCNameInfo, dcinfo); + } + + ndr_err = ndr_push_struct_blob( + &blob, key, dcinfo, + (ndr_push_flags_fn_t)ndr_push_netr_DsRGetDCNameInfo); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + NTSTATUS status = ndr_map_error2ntstatus(ndr_err); + DBG_WARNING("ndr_push_struct_blob failed: %s\n", + ndr_errstr(ndr_err)); + TALLOC_FREE(key); + return status; + } + + ok = gencache_set_data_blob(key, blob, time(NULL)+3600); + + if (!ok) { + DBG_WARNING("gencache_set_data_blob for key %s failed\n", key); + TALLOC_FREE(key); + return NT_STATUS_UNSUCCESSFUL; + } + + TALLOC_FREE(key); + return NT_STATUS_OK; +} + +struct dcinfo_parser_state { + NTSTATUS status; + TALLOC_CTX *mem_ctx; + struct netr_DsRGetDCNameInfo *dcinfo; +}; + +static void dcinfo_parser(const struct gencache_timeout *timeout, + DATA_BLOB blob, + void *private_data) +{ + struct dcinfo_parser_state *state = private_data; + enum ndr_err_code ndr_err; + + if (gencache_timeout_expired(timeout)) { + return; + } + + state->dcinfo = talloc(state->mem_ctx, struct netr_DsRGetDCNameInfo); + if (state->dcinfo == NULL) { + state->status = NT_STATUS_NO_MEMORY; + return; + } + + ndr_err = ndr_pull_struct_blob_all( + &blob, state->dcinfo, state->dcinfo, + (ndr_pull_flags_fn_t)ndr_pull_netr_DsRGetDCNameInfo); + + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + DBG_ERR("ndr_pull_struct_blob failed\n"); + state->status = ndr_map_error2ntstatus(ndr_err); + TALLOC_FREE(state->dcinfo); + return; + } + + state->status = NT_STATUS_OK; +} + +NTSTATUS wb_dsgetdcname_gencache_get(TALLOC_CTX *mem_ctx, + const char *domname, + struct netr_DsRGetDCNameInfo **dcinfo) +{ + struct dcinfo_parser_state state; + char *key; + bool ok; + + key = talloc_asprintf_strupper_m(mem_ctx, "DCINFO/%s", domname); + if (key == NULL) { + return NT_STATUS_NO_MEMORY; + } + + state = (struct dcinfo_parser_state) { + .status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND, + .mem_ctx = mem_ctx, + }; + + ok = gencache_parse(key, dcinfo_parser, &state); + TALLOC_FREE(key); + if (!ok) { + return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND; + } + + if (!NT_STATUS_IS_OK(state.status)) { + return state.status; + } + + if (DEBUGLEVEL >= 10) { + NDR_PRINT_DEBUG(netr_DsRGetDCNameInfo, state.dcinfo); + } + + *dcinfo = state.dcinfo; + return NT_STATUS_OK; +} |