*/
#include "includes.h"
-#include "events.h"
-#include "dlinklist.h"
+#include "lib/events/events.h"
+#include "lib/util/dlinklist.h"
#include "libcli/nbt/libnbt.h"
+#include "lib/socket/socket.h"
+#include "librpc/gen_ndr/ndr_nbt.h"
-#define NBT_MAX_PACKET_SIZE 2048
#define NBT_MAX_REPLIES 1000
-/*
- destroy a nbt socket
-*/
-static int nbtsock_destructor(void *ptr)
-{
- struct nbt_name_socket *nbtsock = talloc_get_type(ptr, struct nbt_name_socket);
- event_remove_fd(nbtsock->event_ctx, nbtsock->fde);
- return 0;
-}
-
/*
destroy a pending request
*/
-static int nbt_name_request_destructor(void *ptr)
-{
- struct nbt_name_request *req = talloc_get_type(ptr, struct nbt_name_request);
-
+static int nbt_name_request_destructor(struct nbt_name_request *req)
+{
if (req->state == NBT_REQUEST_SEND) {
DLIST_REMOVE(req->nbtsock->send_queue, req);
}
if (req->state == NBT_REQUEST_WAIT) {
req->nbtsock->num_pending--;
}
- if (req->request->name_trn_id != 0) {
- idr_remove(req->nbtsock->idr, req->request->name_trn_id);
- req->request->name_trn_id = 0;
+ if (req->name_trn_id != 0 && !req->is_reply) {
+ idr_remove(req->nbtsock->idr, req->name_trn_id);
+ req->name_trn_id = 0;
}
if (req->te) {
- event_remove_timed(req->nbtsock->event_ctx, req->te);
req->te = NULL;
}
if (req->nbtsock->send_queue == NULL) {
- req->nbtsock->fde->flags &= ~EVENT_FD_WRITE;
+ EVENT_FD_NOT_WRITEABLE(req->nbtsock->fde);
}
- if (req->nbtsock->num_pending == 0) {
- req->nbtsock->fde->flags &= ~EVENT_FD_READ;
+ if (req->nbtsock->num_pending == 0 &&
+ req->nbtsock->incoming.handler == NULL) {
+ EVENT_FD_NOT_READABLE(req->nbtsock->fde);
}
return 0;
}
static void nbt_name_socket_send(struct nbt_name_socket *nbtsock)
{
struct nbt_name_request *req = nbtsock->send_queue;
- TALLOC_CTX *tmp_ctx = talloc_new(req);
+ TALLOC_CTX *tmp_ctx = talloc_new(nbtsock);
NTSTATUS status;
while ((req = nbtsock->send_queue)) {
- DATA_BLOB blob;
size_t len;
- if (DEBUGLVL(10)) {
- DEBUG(10,("Sending nbt packet to %s:%d\n",
- req->dest_addr, req->dest_port));
- NDR_PRINT_DEBUG(nbt_name_packet, req->request);
- }
-
- status = ndr_push_struct_blob(&blob, tmp_ctx, req->request,
- (ndr_push_flags_fn_t)
- ndr_push_nbt_name_packet);
- if (!NT_STATUS_IS_OK(status)) goto failed;
-
- if (req->request->operation & NBT_FLAG_BROADCAST) {
- socket_set_option(nbtsock->sock, "SO_BROADCAST", "1");
- }
-
- len = blob.length;
- status = socket_sendto(nbtsock->sock, &blob, &len, 0,
- req->dest_addr, req->dest_port);
+ len = req->encoded.length;
+ status = socket_sendto(nbtsock->sock, &req->encoded, &len,
+ req->dest);
if (NT_STATUS_IS_ERR(status)) goto failed;
if (!NT_STATUS_IS_OK(status)) {
DLIST_REMOVE(nbtsock->send_queue, req);
req->state = NBT_REQUEST_WAIT;
- nbtsock->fde->flags |= EVENT_FD_READ;
- nbtsock->num_pending++;
+ if (req->is_reply) {
+ talloc_free(req);
+ } else {
+ EVENT_FD_READABLE(nbtsock->fde);
+ nbtsock->num_pending++;
+ }
}
- nbtsock->fde->flags &= ~EVENT_FD_WRITE;
+ EVENT_FD_NOT_WRITEABLE(nbtsock->fde);
talloc_free(tmp_ctx);
return;
}
+/*
+ handle a request timeout
+*/
+static void nbt_name_socket_timeout(struct event_context *ev, struct timed_event *te,
+ struct timeval t, void *private)
+{
+ struct nbt_name_request *req = talloc_get_type(private,
+ struct nbt_name_request);
+
+ if (req->num_retries != 0) {
+ req->num_retries--;
+ req->te = event_add_timed(req->nbtsock->event_ctx, req,
+ timeval_add(&t, req->timeout, 0),
+ nbt_name_socket_timeout, req);
+ if (req->state != NBT_REQUEST_SEND) {
+ req->state = NBT_REQUEST_SEND;
+ DLIST_ADD_END(req->nbtsock->send_queue, req,
+ struct nbt_name_request *);
+ }
+ EVENT_FD_WRITEABLE(req->nbtsock->fde);
+ return;
+ }
+
+ nbt_name_request_destructor(req);
+ if (req->num_replies == 0) {
+ req->state = NBT_REQUEST_TIMEOUT;
+ req->status = NT_STATUS_IO_TIMEOUT;
+ } else {
+ req->state = NBT_REQUEST_DONE;
+ req->status = NT_STATUS_OK;
+ }
+ if (req->async.fn) {
+ req->async.fn(req);
+ }
+}
+
+
+
/*
handle recv events on a nbt name socket
*/
{
TALLOC_CTX *tmp_ctx = talloc_new(nbtsock);
NTSTATUS status;
- const char *src_addr;
- int src_port;
+ struct socket_address *src;
DATA_BLOB blob;
- size_t nread;
+ size_t nread, dsize;
struct nbt_name_packet *packet;
struct nbt_name_request *req;
- blob = data_blob_talloc(tmp_ctx, NULL, NBT_MAX_PACKET_SIZE);
+ status = socket_pending(nbtsock->sock, &dsize);
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(tmp_ctx);
+ return;
+ }
+
+ blob = data_blob_talloc(tmp_ctx, NULL, dsize);
if (blob.data == NULL) {
talloc_free(tmp_ctx);
return;
}
- status = socket_recvfrom(nbtsock->sock, blob.data, blob.length, &nread, 0,
- &src_addr, &src_port);
+ status = socket_recvfrom(nbtsock->sock, blob.data, blob.length, &nread,
+ tmp_ctx, &src);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(tmp_ctx);
return;
}
- talloc_steal(tmp_ctx, src_addr);
- blob.length = nread;
packet = talloc(tmp_ctx, struct nbt_name_packet);
if (packet == NULL) {
return;
}
+ /* parse the request */
status = ndr_pull_struct_blob(&blob, packet, packet,
(ndr_pull_flags_fn_t)ndr_pull_nbt_name_packet);
if (!NT_STATUS_IS_OK(status)) {
if (DEBUGLVL(10)) {
DEBUG(10,("Received nbt packet of length %d from %s:%d\n",
- blob.length, src_addr, src_port));
+ (int)blob.length, src->addr, src->port));
NDR_PRINT_DEBUG(nbt_name_packet, packet);
}
+ /* if its not a reply then pass it off to the incoming request
+ handler, if any */
if (!(packet->operation & NBT_FLAG_REPLY)) {
+ if (nbtsock->incoming.handler) {
+ nbtsock->incoming.handler(nbtsock, packet, src);
+ }
talloc_free(tmp_ctx);
return;
}
/* find the matching request */
req = idr_find(nbtsock->idr, packet->name_trn_id);
if (req == NULL) {
- DEBUG(2,("Failed to match request for incoming name packet id 0x%04x\n",
- packet->name_trn_id));
+ if (nbtsock->unexpected.handler) {
+ nbtsock->unexpected.handler(nbtsock, packet, src);
+ } else {
+ DEBUG(10,("Failed to match request for incoming name packet id 0x%04x on %p\n",
+ packet->name_trn_id, nbtsock));
+ }
talloc_free(tmp_ctx);
return;
}
+ /* if this is a WACK response, this we need to go back to waiting,
+ but perhaps increase the timeout */
+ if ((packet->operation & NBT_OPCODE) == NBT_OPCODE_WACK) {
+ if (req->received_wack || packet->ancount < 1) {
+ nbt_name_request_destructor(req);
+ req->status = NT_STATUS_INVALID_NETWORK_RESPONSE;
+ req->state = NBT_REQUEST_ERROR;
+ goto done;
+ }
+ talloc_free(req->te);
+ /* we know we won't need any more retries - the server
+ has received our request */
+ req->num_retries = 0;
+ req->received_wack = True;
+ /* although there can be a timeout in the packet, w2k3 screws it up,
+ so better to set it ourselves */
+ req->timeout = lp_parm_int(-1, "nbt", "wack_timeout", 30);
+ req->te = event_add_timed(req->nbtsock->event_ctx, req,
+ timeval_current_ofs(req->timeout, 0),
+ nbt_name_socket_timeout, req);
+ talloc_free(tmp_ctx);
+ return;
+ }
+
+
req->replies = talloc_realloc(req, req->replies, struct nbt_name_reply, req->num_replies+1);
if (req->replies == NULL) {
nbt_name_request_destructor(req);
- req->state = NBT_REQUEST_DONE;
+ req->state = NBT_REQUEST_ERROR;
req->status = NT_STATUS_NO_MEMORY;
+ goto done;
+ }
+
+ talloc_steal(req, src);
+ req->replies[req->num_replies].dest = src;
+ talloc_steal(req, packet);
+ req->replies[req->num_replies].packet = packet;
+ req->num_replies++;
+
+ /* if we don't want multiple replies then we are done */
+ if (req->allow_multiple_replies &&
+ req->num_replies < NBT_MAX_REPLIES) {
talloc_free(tmp_ctx);
- if (req->async.fn) {
- req->async.fn(req);
- }
return;
}
- req->replies[req->num_replies].reply_addr = talloc_steal(req, src_addr);
- req->replies[req->num_replies].reply_port = src_port;
- req->replies[req->num_replies].packet = talloc_steal(req, packet);
- req->num_replies++;
+ nbt_name_request_destructor(req);
+ req->state = NBT_REQUEST_DONE;
+ req->status = NT_STATUS_OK;
+done:
talloc_free(tmp_ctx);
-
- /* if we don't want multiple replies then we are done */
- if (!req->allow_multiple_replies ||
- req->num_replies == NBT_MAX_REPLIES) {
- nbt_name_request_destructor(req);
- req->state = NBT_REQUEST_DONE;
- req->status = NT_STATUS_OK;
- if (req->async.fn) {
- req->async.fn(req);
- }
+ if (req->async.fn) {
+ req->async.fn(req);
}
}
handle fd events on a nbt_name_socket
*/
static void nbt_name_socket_handler(struct event_context *ev, struct fd_event *fde,
- struct timeval t, uint16_t flags)
+ uint16_t flags, void *private)
{
- struct nbt_name_socket *nbtsock = talloc_get_type(fde->private,
+ struct nbt_name_socket *nbtsock = talloc_get_type(private,
struct nbt_name_socket);
if (flags & EVENT_FD_WRITE) {
nbt_name_socket_send(nbtsock);
- } else if (flags & EVENT_FD_READ) {
+ }
+ if (flags & EVENT_FD_READ) {
nbt_name_socket_recv(nbtsock);
}
}
initialise a nbt_name_socket. The event_ctx is optional, if provided
then operations will use that event context
*/
-struct nbt_name_socket *nbt_name_socket_init(TALLOC_CTX *mem_ctx,
+_PUBLIC_ struct nbt_name_socket *nbt_name_socket_init(TALLOC_CTX *mem_ctx,
struct event_context *event_ctx)
{
struct nbt_name_socket *nbtsock;
NTSTATUS status;
- struct fd_event fde;
nbtsock = talloc(mem_ctx, struct nbt_name_socket);
if (nbtsock == NULL) goto failed;
status = socket_create("ip", SOCKET_TYPE_DGRAM, &nbtsock->sock, 0);
if (!NT_STATUS_IS_OK(status)) goto failed;
+ socket_set_option(nbtsock->sock, "SO_BROADCAST", "1");
+
talloc_steal(nbtsock, nbtsock->sock);
nbtsock->idr = idr_init(nbtsock);
nbtsock->send_queue = NULL;
nbtsock->num_pending = 0;
+ nbtsock->incoming.handler = NULL;
+ nbtsock->unexpected.handler = NULL;
- fde.fd = socket_get_fd(nbtsock->sock);
- fde.flags = 0;
- fde.handler = nbt_name_socket_handler;
- fde.private = nbtsock;
- nbtsock->fde = event_add_fd(nbtsock->event_ctx, &fde);
-
- talloc_set_destructor(nbtsock, nbtsock_destructor);
+ nbtsock->fde = event_add_fd(nbtsock->event_ctx, nbtsock,
+ socket_get_fd(nbtsock->sock), 0,
+ nbt_name_socket_handler, nbtsock);
return nbtsock;
return NULL;
}
-/*
- handle a request timeout
-*/
-static void nbt_name_socket_timeout(struct event_context *ev, struct timed_event *te,
- struct timeval t)
-{
- struct nbt_name_request *req = talloc_get_type(te->private,
- struct nbt_name_request);
- nbt_name_request_destructor(req);
- if (req->num_replies == 0) {
- req->state = NBT_REQUEST_TIMEOUT;
- req->status = NT_STATUS_IO_TIMEOUT;
- } else {
- req->state = NBT_REQUEST_DONE;
- req->status = NT_STATUS_OK;
- }
- if (req->async.fn) {
- req->async.fn(req);
- }
-}
-
/*
send off a nbt name request
*/
struct nbt_name_request *nbt_name_request_send(struct nbt_name_socket *nbtsock,
- const char *dest_addr, int dest_port,
+ struct socket_address *dest,
struct nbt_name_packet *request,
- struct timeval timeout,
+ int timeout, int retries,
BOOL allow_multiple_replies)
{
struct nbt_name_request *req;
- struct timed_event te;
int id;
+ NTSTATUS status;
req = talloc_zero(nbtsock, struct nbt_name_request);
if (req == NULL) goto failed;
- req->nbtsock = nbtsock;
- req->dest_addr = dest_addr;
- req->dest_port = dest_port;
- req->request = talloc_reference(req, request);
+ req->nbtsock = nbtsock;
req->allow_multiple_replies = allow_multiple_replies;
- req->state = NBT_REQUEST_SEND;
+ req->state = NBT_REQUEST_SEND;
+ req->is_reply = False;
+ req->timeout = timeout;
+ req->num_retries = retries;
+ req->dest = dest;
+ if (talloc_reference(req, dest) == NULL) goto failed;
/* we select a random transaction id unless the user supplied one */
- if (req->request->name_trn_id == 0) {
- req->request->name_trn_id = generate_random() % UINT16_MAX;
- }
-
- /* choose the next available transaction id >= the one asked for.
- The strange 2nd call is to try to make the ids less guessable
- and less likely to collide. It's not possible to make NBT secure
- to ID guessing, but this at least makes accidential collisions
- less likely */
- id = idr_get_new_above(req->nbtsock->idr, req,
- req->request->name_trn_id, UINT16_MAX);
- if (id == -1) {
- id = idr_get_new_above(req->nbtsock->idr, req,
- 1+(generate_random()%(UINT16_MAX/2)),
+ if (request->name_trn_id == 0) {
+ id = idr_get_new_random(req->nbtsock->idr, req, UINT16_MAX);
+ } else {
+ if (idr_find(req->nbtsock->idr, request->name_trn_id)) goto failed;
+ id = idr_get_new_above(req->nbtsock->idr, req, request->name_trn_id,
UINT16_MAX);
}
if (id == -1) goto failed;
- req->request->name_trn_id = id;
- te.next_event = timeout;
- te.handler = nbt_name_socket_timeout;
- te.private = req;
- req->te = event_add_timed(nbtsock->event_ctx, &te);
+ request->name_trn_id = id;
+ req->name_trn_id = id;
+
+ req->te = event_add_timed(nbtsock->event_ctx, req,
+ timeval_current_ofs(req->timeout, 0),
+ nbt_name_socket_timeout, req);
talloc_set_destructor(req, nbt_name_request_destructor);
+ status = ndr_push_struct_blob(&req->encoded, req, request,
+ (ndr_push_flags_fn_t)ndr_push_nbt_name_packet);
+ if (!NT_STATUS_IS_OK(status)) goto failed;
+
DLIST_ADD_END(nbtsock->send_queue, req, struct nbt_name_request *);
- nbtsock->fde->flags |= EVENT_FD_WRITE;
+ if (DEBUGLVL(10)) {
+ DEBUG(10,("Queueing nbt packet to %s:%d\n",
+ req->dest->addr, req->dest->port));
+ NDR_PRINT_DEBUG(nbt_name_packet, request);
+ }
+
+ EVENT_FD_WRITEABLE(nbtsock->fde);
return req;
return NULL;
}
+
+/*
+ send off a nbt name reply
+*/
+NTSTATUS nbt_name_reply_send(struct nbt_name_socket *nbtsock,
+ struct socket_address *dest,
+ struct nbt_name_packet *request)
+{
+ struct nbt_name_request *req;
+ NTSTATUS status;
+
+ req = talloc_zero(nbtsock, struct nbt_name_request);
+ NT_STATUS_HAVE_NO_MEMORY(req);
+
+ req->nbtsock = nbtsock;
+ req->dest = dest;
+ if (talloc_reference(req, dest) == NULL) goto failed;
+ req->state = NBT_REQUEST_SEND;
+ req->is_reply = True;
+
+ talloc_set_destructor(req, nbt_name_request_destructor);
+
+ if (DEBUGLVL(10)) {
+ NDR_PRINT_DEBUG(nbt_name_packet, request);
+ }
+
+ status = ndr_push_struct_blob(&req->encoded, req, request,
+ (ndr_push_flags_fn_t)ndr_push_nbt_name_packet);
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(req);
+ return status;
+ }
+
+ DLIST_ADD_END(nbtsock->send_queue, req, struct nbt_name_request *);
+
+ EVENT_FD_WRITEABLE(nbtsock->fde);
+
+ return NT_STATUS_OK;
+
+failed:
+ talloc_free(req);
+ return NT_STATUS_NO_MEMORY;
+}
+
/*
wait for a nbt request to complete
*/
}
return req->status;
}
+
+
+/*
+ setup a handler for incoming requests
+*/
+NTSTATUS nbt_set_incoming_handler(struct nbt_name_socket *nbtsock,
+ void (*handler)(struct nbt_name_socket *, struct nbt_name_packet *,
+ struct socket_address *),
+ void *private)
+{
+ nbtsock->incoming.handler = handler;
+ nbtsock->incoming.private = private;
+ EVENT_FD_READABLE(nbtsock->fde);
+ return NT_STATUS_OK;
+}
+
+
+/*
+ turn a NBT rcode into a NTSTATUS
+*/
+NTSTATUS nbt_rcode_to_ntstatus(uint8_t rcode)
+{
+ int i;
+ struct {
+ enum nbt_rcode rcode;
+ NTSTATUS status;
+ } map[] = {
+ { NBT_RCODE_FMT, NT_STATUS_INVALID_PARAMETER },
+ { NBT_RCODE_SVR, NT_STATUS_SERVER_DISABLED },
+ { NBT_RCODE_NAM, NT_STATUS_OBJECT_NAME_NOT_FOUND },
+ { NBT_RCODE_IMP, NT_STATUS_NOT_SUPPORTED },
+ { NBT_RCODE_RFS, NT_STATUS_ACCESS_DENIED },
+ { NBT_RCODE_ACT, NT_STATUS_ADDRESS_ALREADY_EXISTS },
+ { NBT_RCODE_CFT, NT_STATUS_CONFLICTING_ADDRESSES }
+ };
+ for (i=0;i<ARRAY_SIZE(map);i++) {
+ if (map[i].rcode == rcode) {
+ return map[i].status;
+ }
+ }
+ return NT_STATUS_UNSUCCESSFUL;
+}
git.samba.org / bbaumbach / samba-autobuild / .git / blobdiff