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232054c09b
lib/util/safe_string.h is similar to source3/include/safe_string.h, but the former has fewer checks. It is missing bcopy, strcasecmp, and strncasecmp. Add the missing elements to lib/util/safe_string.h remove the other safe_string.h which is in the source3-specific path. To accomodate existing uses of str(n?)casecmp, add #undef lines to source files where they are used. Signed-off-by: Matthew DeVore <matvore@google.com> Reviewed-by: David Mulder <dmulder@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org> Autobuild-User(master): Jeremy Allison <jra@samba.org> Autobuild-Date(master): Fri Aug 28 02:18:40 UTC 2020 on sn-devel-184
343 lines
8.7 KiB
C
343 lines
8.7 KiB
C
/*
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Unix SMB/CIFS implementation.
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general name resolution interface
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Copyright (C) Andrew Tridgell 2005
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Copyright (C) Jelmer Vernooij 2007
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "libcli/composite/composite.h"
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#include "libcli/resolve/resolve.h"
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#include "librpc/gen_ndr/ndr_nbt.h"
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#include "system/network.h"
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#include "lib/socket/socket.h"
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#include "../lib/util/dlinklist.h"
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#include "lib/tsocket/tsocket.h"
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#include "lib/util/util_net.h"
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#undef strcasecmp
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struct resolve_state {
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struct resolve_context *ctx;
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struct resolve_method *method;
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uint32_t flags;
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uint16_t port;
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struct nbt_name name;
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struct composite_context *creq;
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struct socket_address **addrs;
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char **names;
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};
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static struct composite_context *setup_next_method(struct composite_context *c);
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struct resolve_context {
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struct resolve_method {
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resolve_name_send_fn send_fn;
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resolve_name_recv_fn recv_fn;
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void *privdata;
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struct resolve_method *prev, *next;
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} *methods;
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};
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/**
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* Initialize a resolve context
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*/
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struct resolve_context *resolve_context_init(TALLOC_CTX *mem_ctx)
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{
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return talloc_zero(mem_ctx, struct resolve_context);
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}
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/**
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* Add a resolve method
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*/
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bool resolve_context_add_method(struct resolve_context *ctx, resolve_name_send_fn send_fn,
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resolve_name_recv_fn recv_fn, void *userdata)
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{
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struct resolve_method *method = talloc_zero(ctx, struct resolve_method);
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if (method == NULL)
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return false;
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method->send_fn = send_fn;
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method->recv_fn = recv_fn;
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method->privdata = userdata;
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DLIST_ADD_END(ctx->methods, method);
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return true;
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}
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/**
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handle completion of one name resolve method
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*/
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static void resolve_handler(struct composite_context *creq)
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{
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struct composite_context *c = (struct composite_context *)creq->async.private_data;
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struct resolve_state *state = talloc_get_type(c->private_data, struct resolve_state);
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const struct resolve_method *method = state->method;
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c->status = method->recv_fn(creq, state, &state->addrs, &state->names);
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if (!NT_STATUS_IS_OK(c->status)) {
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state->method = state->method->next;
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state->creq = setup_next_method(c);
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if (state->creq != NULL) {
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return;
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}
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}
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if (!NT_STATUS_IS_OK(c->status)) {
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c->state = COMPOSITE_STATE_ERROR;
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} else {
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c->state = COMPOSITE_STATE_DONE;
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}
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if (c->async.fn) {
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c->async.fn(c);
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}
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}
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static struct composite_context *setup_next_method(struct composite_context *c)
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{
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struct resolve_state *state = talloc_get_type(c->private_data, struct resolve_state);
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struct composite_context *creq = NULL;
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do {
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if (state->method) {
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creq = state->method->send_fn(c, c->event_ctx,
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state->method->privdata,
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state->flags,
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state->port,
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&state->name);
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}
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if (creq == NULL && state->method) state->method = state->method->next;
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} while (!creq && state->method);
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if (creq) {
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creq->async.fn = resolve_handler;
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creq->async.private_data = c;
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}
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return creq;
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}
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/*
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general name resolution - async send
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*/
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struct composite_context *resolve_name_all_send(struct resolve_context *ctx,
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TALLOC_CTX *mem_ctx,
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uint32_t flags, /* RESOLVE_NAME_FLAG_* */
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uint16_t port,
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struct nbt_name *name,
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struct tevent_context *event_ctx)
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{
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struct composite_context *c;
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struct resolve_state *state;
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if (event_ctx == NULL) {
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return NULL;
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}
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c = composite_create(mem_ctx, event_ctx);
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if (c == NULL) return NULL;
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if (composite_nomem(c->event_ctx, c)) return c;
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state = talloc(c, struct resolve_state);
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if (composite_nomem(state, c)) return c;
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c->private_data = state;
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state->flags = flags;
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state->port = port;
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c->status = nbt_name_dup(state, name, &state->name);
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if (!composite_is_ok(c)) return c;
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state->ctx = talloc_reference(state, ctx);
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if (composite_nomem(state->ctx, c)) return c;
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if (is_ipaddress(state->name.name) ||
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strcasecmp(state->name.name, "localhost") == 0) {
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state->addrs = talloc_array(state, struct socket_address *, 2);
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if (composite_nomem(state->addrs, c)) return c;
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state->addrs[0] = socket_address_from_strings(state->addrs, "ip",
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state->name.name, 0);
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if (composite_nomem(state->addrs[0], c)) return c;
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state->addrs[1] = NULL;
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state->names = talloc_array(state, char *, 2);
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if (composite_nomem(state->names, c)) return c;
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state->names[0] = talloc_strdup(state->names, state->name.name);
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if (composite_nomem(state->names[0], c)) return c;
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state->names[1] = NULL;
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composite_done(c);
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return c;
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}
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state->method = ctx->methods;
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if (state->method == NULL) {
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composite_error(c, NT_STATUS_BAD_NETWORK_NAME);
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return c;
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}
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state->creq = setup_next_method(c);
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if (composite_nomem(state->creq, c)) return c;
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return c;
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}
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/*
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general name resolution method - recv side
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*/
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NTSTATUS resolve_name_all_recv(struct composite_context *c,
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TALLOC_CTX *mem_ctx,
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struct socket_address ***addrs,
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char ***names)
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{
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NTSTATUS status;
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status = composite_wait(c);
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if (NT_STATUS_IS_OK(status)) {
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struct resolve_state *state = talloc_get_type(c->private_data, struct resolve_state);
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*addrs = talloc_steal(mem_ctx, state->addrs);
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if (names) {
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*names = talloc_steal(mem_ctx, state->names);
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}
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}
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talloc_free(c);
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return status;
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}
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struct composite_context *resolve_name_ex_send(struct resolve_context *ctx,
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TALLOC_CTX *mem_ctx,
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uint32_t flags, /* RESOLVE_NAME_FLAG_* */
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uint16_t port,
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struct nbt_name *name,
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struct tevent_context *event_ctx)
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{
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return resolve_name_all_send(ctx, mem_ctx, flags, port, name, event_ctx);
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}
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struct composite_context *resolve_name_send(struct resolve_context *ctx,
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TALLOC_CTX *mem_ctx,
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struct nbt_name *name,
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struct tevent_context *event_ctx)
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{
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return resolve_name_ex_send(ctx, mem_ctx, 0, 0, name, event_ctx);
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}
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NTSTATUS resolve_name_recv(struct composite_context *c,
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TALLOC_CTX *mem_ctx,
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const char **reply_addr)
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{
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NTSTATUS status;
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struct socket_address **addrs = NULL;
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status = resolve_name_all_recv(c, mem_ctx, &addrs, NULL);
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if (NT_STATUS_IS_OK(status)) {
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struct tsocket_address *t_addr = socket_address_to_tsocket_address(addrs, addrs[0]);
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if (!t_addr) {
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return NT_STATUS_NO_MEMORY;
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}
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*reply_addr = tsocket_address_inet_addr_string(t_addr, mem_ctx);
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talloc_free(addrs);
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if (!*reply_addr) {
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return NT_STATUS_NO_MEMORY;
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}
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}
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return status;
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}
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/*
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receive multiple responses from resolve_name_send()
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*/
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NTSTATUS resolve_name_multiple_recv(struct composite_context *c,
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TALLOC_CTX *mem_ctx,
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const char ***reply_addrs)
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{
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NTSTATUS status;
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struct socket_address **addrs = NULL;
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int i;
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status = resolve_name_all_recv(c, mem_ctx, &addrs, NULL);
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NT_STATUS_NOT_OK_RETURN(status);
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/* count the addresses */
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for (i=0; addrs[i]; i++) ;
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*reply_addrs = talloc_array(mem_ctx, const char *, i+1);
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NT_STATUS_HAVE_NO_MEMORY(*reply_addrs);
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for (i=0; addrs[i]; i++) {
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struct tsocket_address *t_addr = socket_address_to_tsocket_address(addrs, addrs[i]);
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NT_STATUS_HAVE_NO_MEMORY(t_addr);
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(*reply_addrs)[i] = tsocket_address_inet_addr_string(t_addr, *reply_addrs);
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NT_STATUS_HAVE_NO_MEMORY((*reply_addrs)[i]);
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}
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(*reply_addrs)[i] = NULL;
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talloc_free(addrs);
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return status;
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}
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/*
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general name resolution - sync call
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*/
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NTSTATUS resolve_name_ex(struct resolve_context *ctx,
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uint32_t flags, /* RESOLVE_NAME_FLAG_* */
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uint16_t port,
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struct nbt_name *name,
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TALLOC_CTX *mem_ctx,
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const char **reply_addr,
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struct tevent_context *ev)
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{
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struct composite_context *c = resolve_name_ex_send(ctx, mem_ctx, flags, port, name, ev);
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return resolve_name_recv(c, mem_ctx, reply_addr);
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}
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/* Initialise a struct nbt_name with a NULL scope */
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void make_nbt_name(struct nbt_name *nbt, const char *name, int type)
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{
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nbt->name = name;
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nbt->scope = NULL;
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nbt->type = type;
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}
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/* Initialise a struct nbt_name with a NBT_NAME_CLIENT (0x00) name */
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void make_nbt_name_client(struct nbt_name *nbt, const char *name)
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{
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make_nbt_name(nbt, name, NBT_NAME_CLIENT);
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}
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/* Initialise a struct nbt_name with a NBT_NAME_SERVER (0x20) name */
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void make_nbt_name_server(struct nbt_name *nbt, const char *name)
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{
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make_nbt_name(nbt, name, NBT_NAME_SERVER);
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}
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