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s3: Add name_resolve_bcast_send/recv

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This commit is contained in:
Volker Lendecke 2011-06-19 13:05:29 +02:00
parent bc3261f0c5
commit f811e894c4
2 changed files with 104 additions and 20 deletions
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7
source3/include/proto.h
View File

@ -1044,6 +1044,13 @@ NTSTATUS name_query(const char *name, int name_type,
TALLOC_CTX *mem_ctx,
struct sockaddr_storage **addrs,
int *num_addrs, uint8_t *flags);
struct tevent_req *name_resolve_bcast_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
const char *name,
int name_type);
NTSTATUS name_resolve_bcast_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
struct sockaddr_storage **addrs,
int *num_addrs);
NTSTATUS name_resolve_bcast(const char *name,
int name_type,
TALLOC_CTX *mem_ctx,

117
source3/libsmb/namequery.c
View File

@ -1760,34 +1760,47 @@ static NTSTATUS name_queries(const char *name, int name_type,
Resolve via "bcast" method.
*********************************************************/
NTSTATUS name_resolve_bcast(const char *name,
int name_type,
TALLOC_CTX *mem_ctx,
struct sockaddr_storage **return_iplist,
int *return_count)
struct name_resolve_bcast_state {
struct sockaddr_storage *addrs;
int num_addrs;
};
static void name_resolve_bcast_done(struct tevent_req *subreq);
struct tevent_req *name_resolve_bcast_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
const char *name,
int name_type)
{
struct tevent_req *req, *subreq;
struct name_resolve_bcast_state *state;
struct sockaddr_storage *bcast_addrs;
int i, num_addrs, num_bcast_addrs;
NTSTATUS status;
req = tevent_req_create(mem_ctx, &state,
struct name_resolve_bcast_state);
if (req == NULL) {
return NULL;
}
if (lp_disable_netbios()) {
DEBUG(5,("name_resolve_bcast(%s#%02x): netbios is disabled\n",
name, name_type));
return NT_STATUS_INVALID_PARAMETER;
DEBUG(5, ("name_resolve_bcast(%s#%02x): netbios is disabled\n",
name, name_type));
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
/*
* "bcast" means do a broadcast lookup on all the local interfaces.
*/
DEBUG(3,("name_resolve_bcast: Attempting broadcast lookup "
"for name %s<0x%x>\n", name, name_type));
DEBUG(3, ("name_resolve_bcast: Attempting broadcast lookup "
"for name %s<0x%x>\n", name, name_type));
num_addrs = iface_count();
bcast_addrs = talloc_array(talloc_tos(), struct sockaddr_storage,
num_addrs);
if (bcast_addrs == NULL) {
return NT_STATUS_NO_MEMORY;
bcast_addrs = talloc_array(state, struct sockaddr_storage, num_addrs);
if (tevent_req_nomem(bcast_addrs, req)) {
return tevent_req_post(req, ev);
}
/*
@ -1806,11 +1819,75 @@ NTSTATUS name_resolve_bcast(const char *name,
num_bcast_addrs += 1;
}
status = name_queries(name, name_type, true, true,
bcast_addrs, num_bcast_addrs, 0, 1000,
mem_ctx, return_iplist, return_count,
NULL, NULL);
TALLOC_FREE(bcast_addrs);
subreq = name_queries_send(state, ev, name, name_type, true, true,
bcast_addrs, num_bcast_addrs, 0, 1000);
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
tevent_req_set_callback(subreq, name_resolve_bcast_done, req);
return req;
}
static void name_resolve_bcast_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct name_resolve_bcast_state *state = tevent_req_data(
req, struct name_resolve_bcast_state);
NTSTATUS status;
status = name_queries_recv(subreq, state,
&state->addrs, &state->num_addrs,
NULL, NULL);
TALLOC_FREE(subreq);
if (tevent_req_nterror(req, status)) {
return;
}
tevent_req_done(req);
}
NTSTATUS name_resolve_bcast_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
struct sockaddr_storage **addrs,
int *num_addrs)
{
struct name_resolve_bcast_state *state = tevent_req_data(
req, struct name_resolve_bcast_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
return status;
}
*addrs = talloc_move(mem_ctx, &state->addrs);
*num_addrs = state->num_addrs;
return NT_STATUS_OK;
}
NTSTATUS name_resolve_bcast(const char *name,
int name_type,
TALLOC_CTX *mem_ctx,
struct sockaddr_storage **return_iplist,
int *return_count)
{
TALLOC_CTX *frame = talloc_stackframe();
struct event_context *ev;
struct tevent_req *req;
NTSTATUS status = NT_STATUS_NO_MEMORY;
ev = event_context_init(frame);
if (ev == NULL) {
goto fail;
}
req = name_resolve_bcast_send(frame, ev, name, name_type);
if (req == NULL) {
goto fail;
}
if (!tevent_req_poll_ntstatus(req, ev, &status)) {
goto fail;
}
status = name_resolve_bcast_recv(req, mem_ctx, return_iplist,
return_count);
fail:
TALLOC_FREE(frame);
return status;
}