diff options
Diffstat (limited to 'source4/libnet/libnet_lookup.c')
| -rw-r--r-- | source4/libnet/libnet_lookup.c | 415 |
1 files changed, 415 insertions, 0 deletions
diff --git a/source4/libnet/libnet_lookup.c b/source4/libnet/libnet_lookup.c new file mode 100644 index 0000000000..cab4d9e73f --- /dev/null +++ b/source4/libnet/libnet_lookup.c @@ -0,0 +1,415 @@ +/* + 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 = 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; + + 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); +} |