diff options
Diffstat (limited to 'source4/libnet/libnet_lookup.c')
| -rw-r--r-- | source4/libnet/libnet_lookup.c | 448 |
1 files changed, 448 insertions, 0 deletions
diff --git a/source4/libnet/libnet_lookup.c b/source4/libnet/libnet_lookup.c new file mode 100644 index 0000000..63ce601 --- /dev/null +++ b/source4/libnet/libnet_lookup.c @@ -0,0 +1,448 @@ +/* + 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 "libnet/libnet.h" +#include "libcli/composite/composite.h" +#include "auth/credentials/credentials.h" +#include "libcli/resolve/resolve.h" +#include "libcli/finddc.h" +#include "libcli/security/security.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, + TALLOC_CTX *mem_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(mem_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, &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)) { + char **address; + + s = talloc_get_type(c->private_data, struct lookup_state); + + address = str_list_make_single(mem_ctx, s->address); + NT_STATUS_HAVE_NO_MEMORY(address); + io->out.address = discard_const_p(const char *, 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, mem_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, + TALLOC_CTX *mem_ctx, + struct libnet_Lookup *io) +{ + io->in.type = NBT_NAME_SERVER; + return libnet_Lookup_send(ctx, mem_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, mem_ctx, io); + return libnet_Lookup_recv(c, mem_ctx, io); +} + + +/** + * Sends asynchronous LookupDCs request + */ +struct tevent_req *libnet_LookupDCs_send(struct libnet_context *ctx, + TALLOC_CTX *mem_ctx, + struct libnet_LookupDCs *io) +{ + struct tevent_req *req; + struct finddcs finddcs_io; + + ZERO_STRUCT(finddcs_io); + + if (strcasecmp_m(io->in.domain_name, lpcfg_workgroup(ctx->lp_ctx)) == 0) { + finddcs_io.in.domain_name = lpcfg_dnsdomain(ctx->lp_ctx); + } else { + finddcs_io.in.domain_name = io->in.domain_name; + } + finddcs_io.in.minimum_dc_flags = NBT_SERVER_LDAP | NBT_SERVER_DS | NBT_SERVER_WRITABLE; + finddcs_io.in.server_address = ctx->server_address; + + req = finddcs_cldap_send(mem_ctx, &finddcs_io, ctx->resolve_ctx, ctx->event_ctx); + return req; +} + +/** + * 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 tevent_req *req, TALLOC_CTX *mem_ctx, + struct libnet_LookupDCs *io) +{ + NTSTATUS status; + struct finddcs finddcs_io; + status = finddcs_cldap_recv(req, mem_ctx, &finddcs_io); + talloc_free(req); + io->out.num_dcs = 1; + io->out.dcs = talloc(mem_ctx, struct nbt_dc_name); + NT_STATUS_HAVE_NO_MEMORY(io->out.dcs); + io->out.dcs[0].address = finddcs_io.out.address; + io->out.dcs[0].name = finddcs_io.out.netlogon.data.nt5_ex.pdc_dns_name; + return status; +} + + +/** + * Synchronous version of LookupDCs + */ +NTSTATUS libnet_LookupDCs(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, + struct libnet_LookupDCs *io) +{ + struct tevent_req *req = libnet_LookupDCs_send(ctx, mem_ctx, io); + return libnet_LookupDCs_recv(req, 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 tevent_req *subreq); + + +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 tevent_req *subreq; + 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, c, 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; + + subreq = dcerpc_lsa_LookupNames_r_send(s, c->event_ctx, + ctx->lsa.pipe->binding_handle, + &s->lookup); + if (composite_nomem(subreq, c)) return c; + + tevent_req_set_callback(subreq, 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(s, 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(s, 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 tevent_req *subreq; + + 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; + + subreq = dcerpc_lsa_LookupNames_r_send(s, c->event_ctx, + s->ctx->lsa.pipe->binding_handle, + &s->lookup); + if (composite_nomem(subreq, c)) return; + + tevent_req_set_callback(subreq, continue_name_found, c); +} + + +static void continue_name_found(struct tevent_req *subreq) +{ + struct composite_context *c; + struct lookup_name_state *s; + + c = tevent_req_callback_data(subreq, struct composite_context); + s = talloc_get_type(c->private_data, struct lookup_name_state); + + c->status = dcerpc_lsa_LookupNames_r_recv(subreq, s); + TALLOC_FREE(subreq); + if (!composite_is_ok(c)) return; + + c->status = s->lookup.out.result; + if (!composite_is_ok(c)) return; + + if (s->lookup.out.sids->count != s->lookup.in.num_names) { + composite_error(c, NT_STATUS_INVALID_NETWORK_RESPONSE); + 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 = NULL; + struct lsa_RefDomainList *domains = NULL; + struct lsa_TransSidArray *sids = NULL; + + status = composite_wait(c); + ZERO_STRUCT(io->out); + + if (!NT_STATUS_IS_OK(status)) { + io->out.error_string = talloc_asprintf(mem_ctx, "Error: %s", + nt_errstr(status)); + goto done; + } + + s = talloc_get_type(c->private_data, struct lookup_name_state); + + if (*s->lookup.out.count == 0) { + goto success; + } + + domains = *s->lookup.out.domains; + 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) { + goto success; + } + + 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); + if (io->out.sid == NULL) { + status = NT_STATUS_NO_MEMORY; + goto done; + } + io->out.sidstr = dom_sid_string(mem_ctx, io->out.sid); + if (io->out.sidstr == NULL) { + status = NT_STATUS_NO_MEMORY; + goto done; + } + } + +success: + io->out.error_string = talloc_strdup(mem_ctx, "Success"); +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); +} |