/* Unix SMB/CIFS implementation. Copyright (C) Rafal Szczesniak 2005 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/>. */ /* a composite function for name resolving */ #include "includes.h" #include "lib/events/events.h" #include "libnet/libnet.h" #include "libcli/composite/composite.h" #include "auth/credentials/credentials.h" #include "lib/messaging/messaging.h" #include "lib/messaging/irpc.h" #include "libcli/resolve/resolve.h" #include "libcli/finddcs.h" #include "libcli/security/security.h" #include "librpc/gen_ndr/lsa.h" #include "librpc/gen_ndr/ndr_lsa_c.h" #include "param/param.h" struct lookup_state { struct nbt_name hostname; const char *address; }; static void continue_name_resolved(struct composite_context *ctx); /** * Sends asynchronous Lookup request * * @param io arguments and result of the call */ struct composite_context *libnet_Lookup_send(struct libnet_context *ctx, struct libnet_Lookup *io) { struct composite_context *c; struct lookup_state *s; struct composite_context *cresolve_req; struct resolve_context *resolve_ctx; /* allocate context and state structures */ c = composite_create(ctx, ctx->event_ctx); if (c == NULL) return NULL; s = talloc_zero(c, struct lookup_state); if (composite_nomem(s, c)) return c; c->private_data = s; if (io == NULL || io->in.hostname == NULL) { composite_error(c, NT_STATUS_INVALID_PARAMETER); return c; } /* parameters */ s->hostname.name = talloc_strdup(s, io->in.hostname); if (composite_nomem(s->hostname.name, c)) return c; s->hostname.type = io->in.type; s->hostname.scope = NULL; /* name resolution methods */ if (io->in.resolve_ctx) { resolve_ctx = io->in.resolve_ctx; } else { resolve_ctx = ctx->resolve_ctx; } /* send resolve request */ cresolve_req = resolve_name_send(resolve_ctx, &s->hostname, c->event_ctx); if (composite_nomem(cresolve_req, c)) return c; composite_continue(c, cresolve_req, continue_name_resolved, c); return c; } static void continue_name_resolved(struct composite_context *ctx) { struct composite_context *c; struct lookup_state *s; c = talloc_get_type(ctx->async.private_data, struct composite_context); s = talloc_get_type(c->private_data, struct lookup_state); c->status = resolve_name_recv(ctx, s, &s->address); composite_done(c); } /** * Waits for and receives results of asynchronous Lookup call * * @param c composite context returned by asynchronous Lookup call * @param mem_ctx memory context of the call * @param io pointer to results (and arguments) of the call * @return nt status code of execution */ NTSTATUS libnet_Lookup_recv(struct composite_context *c, TALLOC_CTX *mem_ctx, struct libnet_Lookup *io) { NTSTATUS status; struct lookup_state *s; status = composite_wait(c); if (NT_STATUS_IS_OK(status)) { s = talloc_get_type(c->private_data, struct lookup_state); io->out.address = (const char **)str_list_make(mem_ctx, s->address, NULL); NT_STATUS_HAVE_NO_MEMORY(io->out.address); } talloc_free(c); return status; } /** * Synchronous version of Lookup call * * @param mem_ctx memory context for the call * @param io arguments and results of the call * @return nt status code of execution */ NTSTATUS libnet_Lookup(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct libnet_Lookup *io) { struct composite_context *c = libnet_Lookup_send(ctx, io); return libnet_Lookup_recv(c, mem_ctx, io); } /* * Shortcut functions to find common types of name * (and skip nbt name type argument) */ /** * Sends asynchronous LookupHost request */ struct composite_context* libnet_LookupHost_send(struct libnet_context *ctx, struct libnet_Lookup *io) { io->in.type = NBT_NAME_SERVER; return libnet_Lookup_send(ctx, io); } /** * Synchronous version of LookupHost call */ NTSTATUS libnet_LookupHost(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct libnet_Lookup *io) { struct composite_context *c = libnet_LookupHost_send(ctx, io); return libnet_Lookup_recv(c, mem_ctx, io); } /** * Sends asynchronous LookupDCs request */ struct composite_context* libnet_LookupDCs_send(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct libnet_LookupDCs *io) { struct composite_context *c; struct messaging_context *msg_ctx = messaging_client_init(mem_ctx, lp_messaging_path(mem_ctx, ctx->lp_ctx), lp_iconv_convenience(ctx->lp_ctx), ctx->event_ctx); c = finddcs_send(mem_ctx, lp_netbios_name(ctx->lp_ctx), lp_nbt_port(ctx->lp_ctx), io->in.domain_name, io->in.name_type, NULL, lp_iconv_convenience(ctx->lp_ctx), ctx->resolve_ctx, ctx->event_ctx, msg_ctx); return c; } /** * Waits for and receives results of asynchronous Lookup call * * @param c composite context returned by asynchronous Lookup call * @param mem_ctx memory context of the call * @param io pointer to results (and arguments) of the call * @return nt status code of execution */ NTSTATUS libnet_LookupDCs_recv(struct composite_context *c, TALLOC_CTX *mem_ctx, struct libnet_LookupDCs *io) { NTSTATUS status; status = finddcs_recv(c, mem_ctx, &io->out.num_dcs, &io->out.dcs); if (!NT_STATUS_IS_OK(status)) { return status; } return status; } /** * Synchronous version of LookupDCs */ NTSTATUS libnet_LookupDCs(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct libnet_LookupDCs *io) { struct composite_context *c = libnet_LookupDCs_send(ctx, mem_ctx, io); return libnet_LookupDCs_recv(c, mem_ctx, io); } struct lookup_name_state { struct libnet_context *ctx; const char *name; uint32_t count; struct libnet_DomainOpen domopen; struct lsa_LookupNames lookup; struct lsa_TransSidArray sids; struct lsa_String *names; /* information about the progress */ void (*monitor_fn)(struct monitor_msg *); }; static bool prepare_lookup_params(struct libnet_context *ctx, struct composite_context *c, struct lookup_name_state *s); static void continue_lookup_name(struct composite_context *ctx); static void continue_name_found(struct rpc_request *req); struct composite_context* libnet_LookupName_send(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct libnet_LookupName *io, void (*monitor)(struct monitor_msg*)) { struct composite_context *c; struct lookup_name_state *s; struct rpc_request *lookup_req; bool prereq_met = false; c = composite_create(mem_ctx, ctx->event_ctx); if (c == NULL) return NULL; s = talloc_zero(c, struct lookup_name_state); if (composite_nomem(s, c)) return c; c->private_data = s; s->name = talloc_strdup(c, io->in.name); s->monitor_fn = monitor; s->ctx = ctx; prereq_met = lsa_domain_opened(ctx, io->in.domain_name, &c, &s->domopen, continue_lookup_name, monitor); if (!prereq_met) return c; if (!prepare_lookup_params(ctx, c, s)) return c; lookup_req = dcerpc_lsa_LookupNames_send(ctx->lsa.pipe, c, &s->lookup); if (composite_nomem(lookup_req, c)) return c; composite_continue_rpc(c, lookup_req, continue_name_found, c); return c; } static bool prepare_lookup_params(struct libnet_context *ctx, struct composite_context *c, struct lookup_name_state *s) { const int single_name = 1; s->sids.count = 0; s->sids.sids = NULL; s->names = talloc_array(ctx, struct lsa_String, single_name); if (composite_nomem(s->names, c)) return false; s->names[0].string = s->name; s->lookup.in.handle = &ctx->lsa.handle; s->lookup.in.num_names = single_name; s->lookup.in.names = s->names; s->lookup.in.sids = &s->sids; s->lookup.in.level = 1; s->lookup.in.count = &s->count; s->lookup.out.count = &s->count; s->lookup.out.sids = &s->sids; s->lookup.out.domains = talloc_zero(ctx, struct lsa_RefDomainList *); if (composite_nomem(s->lookup.out.domains, c)) return false; return true; } static void continue_lookup_name(struct composite_context *ctx) { struct composite_context *c; struct lookup_name_state *s; struct rpc_request *lookup_req; c = talloc_get_type(ctx->async.private_data, struct composite_context); s = talloc_get_type(c->private_data, struct lookup_name_state); c->status = libnet_DomainOpen_recv(ctx, s->ctx, c, &s->domopen); if (!composite_is_ok(c)) return; if (!prepare_lookup_params(s->ctx, c, s)) return; lookup_req = dcerpc_lsa_LookupNames_send(s->ctx->lsa.pipe, c, &s->lookup); if (composite_nomem(lookup_req, c)) return; composite_continue_rpc(c, lookup_req, continue_name_found, c); } static void continue_name_found(struct rpc_request *req) { struct composite_context *c; struct lookup_name_state *s; c = talloc_get_type(req->async.private_data, struct composite_context); s = talloc_get_type(c->private_data, struct lookup_name_state); c->status = dcerpc_ndr_request_recv(req); if (!composite_is_ok(c)) return; c->status = s->lookup.out.result; if (!composite_is_ok(c)) return; composite_done(c); } NTSTATUS libnet_LookupName_recv(struct composite_context *c, TALLOC_CTX *mem_ctx, struct libnet_LookupName *io) { NTSTATUS status; struct lookup_name_state *s; status = composite_wait(c); if (NT_STATUS_IS_OK(status)) { s = talloc_get_type(c->private_data, struct lookup_name_state); io->out.rid = 0; io->out.sid = NULL; io->out.sidstr = NULL; if (*s->lookup.out.count > 0) { struct lsa_RefDomainList *domains = *s->lookup.out.domains; struct lsa_TransSidArray *sids = s->lookup.out.sids; if (domains == NULL || sids == NULL) { status = NT_STATUS_UNSUCCESSFUL; io->out.error_string = talloc_asprintf(mem_ctx, "Error: %s", nt_errstr(status)); goto done; } if (sids->count > 0) { io->out.rid = sids->sids[0].rid; io->out.sid_type = sids->sids[0].sid_type; if (domains->count > 0) { io->out.sid = dom_sid_add_rid(mem_ctx, domains->domains[0].sid, io->out.rid); NT_STATUS_HAVE_NO_MEMORY(io->out.sid); io->out.sidstr = dom_sid_string(mem_ctx, io->out.sid); NT_STATUS_HAVE_NO_MEMORY(io->out.sidstr); } } } io->out.error_string = talloc_strdup(mem_ctx, "Success"); } else if (!NT_STATUS_IS_OK(status)) { io->out.error_string = talloc_asprintf(mem_ctx, "Error: %s", nt_errstr(status)); } done: talloc_free(c); return status; } NTSTATUS libnet_LookupName(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct libnet_LookupName *io) { struct composite_context *c; c = libnet_LookupName_send(ctx, mem_ctx, io, NULL); return libnet_LookupName_recv(c, mem_ctx, io); }