#include "libcli/named_pipe_auth/npa_tstream.h"
#include "../auth/auth_sam_reply.h"
+#define SERVER_TCP_LOW_PORT 1024
+#define SERVER_TCP_HIGH_PORT 1300
+
+static NTSTATUS auth_anonymous_session_info(TALLOC_CTX *mem_ctx,
+ struct auth_session_info_transport **session_info)
+{
+ struct auth_session_info_transport *i;
+ struct auth_serversupplied_info *s;
+ struct auth_user_info_dc *u;
+ union netr_Validation val;
+ NTSTATUS status;
+
+ i = talloc_zero(mem_ctx, struct auth_session_info_transport);
+ if (i == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = make_server_info_guest(i, &s);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ i->security_token = s->security_token;
+ i->session_key = s->user_session_key;
+
+ val.sam3 = s->info3;
+
+ status = make_user_info_dc_netlogon_validation(mem_ctx,
+ "",
+ 3,
+ &val,
+ &u);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("conversion of info3 into user_info_dc failed!\n"));
+ return status;
+ }
+ i->info = talloc_move(i, &u->info);
+ talloc_free(u);
+
+ *session_info = i;
+
+ return NT_STATUS_OK;
+}
+
/* Creates a pipes_struct and initializes it with the information
* sent from the client */
static int make_server_pipes_struct(TALLOC_CTX *mem_ctx,
* dispatch requests to the pipes rpc implementation */
struct dcerpc_ncacn_listen_state {
+ struct ndr_syntax_id syntax_id;
+
int fd;
union {
char *name;
uint16_t port;
} ep;
+
+ struct tevent_context *ev_ctx;
+ struct messaging_context *msg_ctx;
};
static void named_pipe_listener(struct tevent_context *ev,
talloc_free(npc);
return;
}
+
+/********************************************************************
+ * Start listening on the tcp/ip socket
+ ********************************************************************/
+
+static void dcerpc_ncacn_tcpip_listener(struct tevent_context *ev,
+ struct tevent_fd *fde,
+ uint16_t flags,
+ void *private_data);
+
+uint16_t setup_dcerpc_ncacn_tcpip_socket(struct tevent_context *ev_ctx,
+ struct messaging_context *msg_ctx,
+ struct ndr_syntax_id syntax_id,
+ const struct sockaddr_storage *ifss,
+ uint16_t port)
+{
+ struct dcerpc_ncacn_listen_state *state;
+ struct tevent_fd *fde;
+ int rc;
+
+ state = talloc(ev_ctx, struct dcerpc_ncacn_listen_state);
+ if (state == NULL) {
+ DEBUG(0, ("setup_dcerpc_ncacn_tcpip_socket: Out of memory\n"));
+ return false;
+ }
+
+ state->syntax_id = syntax_id;
+ state->fd = -1;
+ state->ep.port = port;
+
+ if (state->ep.port == 0) {
+ uint16_t i;
+
+ for (i = SERVER_TCP_LOW_PORT; i <= SERVER_TCP_HIGH_PORT; i++) {
+ state->fd = open_socket_in(SOCK_STREAM,
+ i,
+ 0,
+ ifss,
+ false);
+ if (state->fd > 0) {
+ state->ep.port = i;
+ break;
+ }
+ }
+ } else {
+ state->fd = open_socket_in(SOCK_STREAM,
+ state->ep.port,
+ 0,
+ ifss,
+ true);
+ }
+ if (state->fd == -1) {
+ DEBUG(0, ("setup_dcerpc_ncacn_tcpip_socket: Failed to create "
+ "socket on port %u!\n", state->ep.port));
+ goto out;
+ }
+
+ state->ev_ctx = ev_ctx;
+ state->msg_ctx = msg_ctx;
+
+ /* ready to listen */
+ set_socket_options(state->fd, "SO_KEEPALIVE");
+ set_socket_options(state->fd, lp_socket_options());
+
+ /* Set server socket to non-blocking for the accept. */
+ set_blocking(state->fd, false);
+
+ rc = listen(state->fd, SMBD_LISTEN_BACKLOG);
+ if (rc == -1) {
+ DEBUG(0,("setup_tcpip_socket: listen - %s\n", strerror(errno)));
+ goto out;
+ }
+
+ DEBUG(10, ("setup_tcpip_socket: openened socket fd %d for port %u\n",
+ state->fd, state->ep.port));
+
+ fde = tevent_add_fd(state->ev_ctx,
+ state,
+ state->fd,
+ TEVENT_FD_READ,
+ dcerpc_ncacn_tcpip_listener,
+ state);
+ if (fde == NULL) {
+ DEBUG(0, ("setup_tcpip_socket: Failed to add event handler!\n"));
+ goto out;
+ }
+
+ tevent_fd_set_auto_close(fde);
+
+ return state->ep.port;
+out:
+ if (state->fd != -1) {
+ close(state->fd);
+ }
+ TALLOC_FREE(state);
+
+ return 0;
+}
+
+static void dcerpc_ncacn_accept(struct tevent_context *ev_ctx,
+ struct messaging_context *msg_ctx,
+ struct ndr_syntax_id syntax_id,
+ enum dcerpc_transport_t transport,
+ const char *name,
+ uint16_t port,
+ struct tsocket_address *cli_addr,
+ int s);
+
+static void dcerpc_ncacn_tcpip_listener(struct tevent_context *ev,
+ struct tevent_fd *fde,
+ uint16_t flags,
+ void *private_data)
+{
+ struct dcerpc_ncacn_listen_state *state =
+ talloc_get_type_abort(private_data,
+ struct dcerpc_ncacn_listen_state);
+ struct tsocket_address *cli_addr;
+ struct sockaddr_storage addr;
+ socklen_t in_addrlen = sizeof(addr);
+ int s = -1;
+ int rc;
+
+ while (s == -1) {
+ s = accept(state->fd, (struct sockaddr *)(void *) &addr, &in_addrlen);
+ if (s == -1 && errno != EINTR) {
+ break;
+ }
+ }
+
+ if (s == -1) {
+ DEBUG(0,("tcpip_listener accept: %s\n",
+ strerror(errno)));
+ return;
+ }
+
+ rc = tsocket_address_bsd_from_sockaddr(state,
+ (struct sockaddr *)(void *) &addr,
+ in_addrlen,
+ &cli_addr);
+ if (rc < 0) {
+ close(s);
+ return;
+ }
+
+ DEBUG(6, ("tcpip_listener: Accepted socket %d\n", s));
+
+ dcerpc_ncacn_accept(state->ev_ctx,
+ state->msg_ctx,
+ state->syntax_id,
+ NCACN_IP_TCP,
+ NULL,
+ state->ep.port,
+ cli_addr,
+ s);
+}
+
+struct dcerpc_ncacn_conn {
+ struct ndr_syntax_id syntax_id;
+
+ enum dcerpc_transport_t transport;
+
+ union {
+ const char *name;
+ uint16_t port;
+ } ep;
+
+ int sock;
+
+ struct pipes_struct *p;
+
+ struct tevent_context *ev_ctx;
+ struct messaging_context *msg_ctx;
+
+ struct tstream_context *tstream;
+ struct tevent_queue *send_queue;
+
+ struct tsocket_address *client;
+ char *client_name;
+ struct tsocket_address *server;
+ char *server_name;
+ struct auth_session_info_transport *session_info;
+
+ struct iovec *iov;
+ size_t count;
+};
+
+static void dcerpc_ncacn_packet_process(struct tevent_req *subreq);
+static void dcerpc_ncacn_packet_done(struct tevent_req *subreq);
+
+static void dcerpc_ncacn_accept(struct tevent_context *ev_ctx,
+ struct messaging_context *msg_ctx,
+ struct ndr_syntax_id syntax_id,
+ enum dcerpc_transport_t transport,
+ const char *name,
+ uint16_t port,
+ struct tsocket_address *cli_addr,
+ int s) {
+ struct dcerpc_ncacn_conn *ncacn_conn;
+ struct tevent_req *subreq;
+ const char *cli_str;
+ char *pipe_name;
+ NTSTATUS status;
+ int sys_errno;
+ int rc;
+
+ DEBUG(5, ("dcerpc_ncacn_accept\n"));
+
+ ncacn_conn = talloc_zero(ev_ctx, struct dcerpc_ncacn_conn);
+ if (ncacn_conn == NULL) {
+ DEBUG(0, ("dcerpc_ncacn_accept: Out of memory!\n"));
+ close(s);
+ return;
+ }
+
+ switch (transport) {
+ case NCACN_IP_TCP:
+ ncacn_conn->ep.port = port;
+ break;
+ case NCALRPC:
+ case NCACN_NP:
+ ncacn_conn->ep.name = talloc_strdup(ncacn_conn, name);
+ break;
+ default:
+ DEBUG(0, ("dcerpc_ncacn_accept_function: "
+ "unknown transport: %u!\n", transport));
+ talloc_free(ncacn_conn);
+ close(s);
+ return;
+ }
+ ncacn_conn->transport = transport;
+ ncacn_conn->syntax_id = syntax_id;
+ ncacn_conn->ev_ctx = ev_ctx;
+ ncacn_conn->msg_ctx = msg_ctx;
+ ncacn_conn->sock = s;
+
+ ncacn_conn->client = talloc_move(ncacn_conn, &cli_addr);
+
+ rc = set_blocking(s, false);
+ if (rc < 0) {
+ DEBUG(2, ("dcerpc_ncacn_accept: Failed to set socket to "
+ "non-blocking\n"));
+ talloc_free(ncacn_conn);
+ close(s);
+ return;
+ }
+
+ /*
+ * As soon as we have tstream_bsd_existing_socket set up it will take
+ * care closing the socket.
+ */
+ rc = tstream_bsd_existing_socket(ncacn_conn, s, &ncacn_conn->tstream);
+ if (rc < 0) {
+ DEBUG(2, ("dcerpc_ncacn_accept: Failed to create tstream "
+ "socket\n"));
+ talloc_free(ncacn_conn);
+ close(s);
+ return;
+ }
+
+ switch(ncacn_conn->transport) {
+ case NCACN_IP_TCP:
+ pipe_name = tsocket_address_string(ncacn_conn->client,
+ ncacn_conn);
+ break;
+ case NCALRPC:
+ pipe_name = talloc_strdup(ncacn_conn,
+ ncacn_conn->ep.name);
+ break;
+ default:
+ talloc_free(ncacn_conn);
+ return;
+ }
+
+ if (tsocket_address_is_inet(ncacn_conn->client, "ip")) {
+ cli_str = tsocket_address_inet_addr_string(ncacn_conn->client,
+ ncacn_conn);
+ if (cli_str == NULL) {
+ talloc_free(ncacn_conn);
+ return;
+ }
+ } else {
+ cli_str = "";
+ }
+
+ if (ncacn_conn->session_info == NULL) {
+ status = auth_anonymous_session_info(ncacn_conn,
+ &ncacn_conn->session_info);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(2, ("dcerpc_ncacn_accept: Failed to create "
+ "auth_anonymous_session_info - %s\n",
+ nt_errstr(status)));
+ talloc_free(ncacn_conn);
+ return;
+ }
+ }
+
+ rc = make_server_pipes_struct(ncacn_conn,
+ pipe_name,
+ ncacn_conn->syntax_id,
+ cli_str,
+ ncacn_conn->session_info,
+ &ncacn_conn->p,
+ &sys_errno);
+ if (rc < 0) {
+ DEBUG(2, ("dcerpc_ncacn_accept: Failed to create pipe "
+ "struct - %s", strerror(sys_errno)));
+ talloc_free(ncacn_conn);
+ return;
+ }
+
+ ncacn_conn->send_queue = tevent_queue_create(ncacn_conn,
+ "dcerpc_tcpip_accept_function");
+ if (ncacn_conn->send_queue == NULL) {
+ DEBUG(0, ("dcerpc_ncacn_accept_function: Out of memory!\n"));
+ talloc_free(ncacn_conn);
+ return;
+ }
+
+ subreq = dcerpc_ncacn_read_packet_send(ncacn_conn,
+ ncacn_conn->ev_ctx,
+ ncacn_conn->tstream);
+ if (subreq == NULL) {
+ DEBUG(2, ("dcerpc_ncacn_accept: Failed to send ncacn "
+ "packet\n"));
+ talloc_free(ncacn_conn);
+ return;
+ }
+
+ tevent_req_set_callback(subreq, dcerpc_ncacn_packet_process, ncacn_conn);
+
+ DEBUG(5, ("dcerpc_ncacn_accept done\n"));
+
+ return;
+}
+
+static void dcerpc_ncacn_packet_process(struct tevent_req *subreq)
+{
+ struct dcerpc_ncacn_conn *ncacn_conn =
+ tevent_req_callback_data(subreq, struct dcerpc_ncacn_conn);
+
+ struct _output_data *out = &ncacn_conn->p->out_data;
+ DATA_BLOB recv_buffer = data_blob_null;
+ ssize_t data_left;
+ ssize_t data_used;
+ uint32_t to_send;
+ char *data;
+ NTSTATUS status;
+ bool ok;
+
+ status = dcerpc_ncacn_read_packet_recv(subreq, ncacn_conn, &recv_buffer);
+ TALLOC_FREE(subreq);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto fail;
+ }
+
+ data_left = recv_buffer.length;
+ data = (char *) recv_buffer.data;
+
+ while (data_left) {
+ data_used = process_incoming_data(ncacn_conn->p, data, data_left);
+ if (data_used < 0) {
+ DEBUG(3, ("Failed to process dcerpc request!\n"));
+ status = NT_STATUS_UNEXPECTED_IO_ERROR;
+ goto fail;
+ }
+
+ data_left -= data_used;
+ data += data_used;
+ }
+
+ /* Do not leak this buffer */
+ talloc_free(recv_buffer.data);
+
+ /*
+ * This is needed because of the way DCERPC binds work in the RPC
+ * marshalling code
+ */
+ to_send = out->frag.length - out->current_pdu_sent;
+ if (to_send > 0) {
+
+ DEBUG(10, ("Current_pdu_len = %u, "
+ "current_pdu_sent = %u "
+ "Returning %u bytes\n",
+ (unsigned int)out->frag.length,
+ (unsigned int)out->current_pdu_sent,
+ (unsigned int)to_send));
+
+ ncacn_conn->iov = talloc_zero(ncacn_conn, struct iovec);
+ if (ncacn_conn->iov == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto fail;
+ }
+ ncacn_conn->count = 1;
+
+ ncacn_conn->iov[0].iov_base = out->frag.data
+ + out->current_pdu_sent;
+ ncacn_conn->iov[0].iov_len = to_send;
+
+ out->current_pdu_sent += to_send;
+ }
+
+ /*
+ * This condition is false for bind packets, or when we haven't yet got
+ * a full request, and need to wait for more data from the client
+ */
+ while (out->data_sent_length < out->rdata.length) {
+ ok = create_next_pdu(ncacn_conn->p);
+ if (!ok) {
+ DEBUG(3, ("Failed to create next PDU!\n"));
+ status = NT_STATUS_UNEXPECTED_IO_ERROR;
+ goto fail;
+ }
+
+ ncacn_conn->iov = talloc_realloc(ncacn_conn,
+ ncacn_conn->iov,
+ struct iovec,
+ ncacn_conn->count + 1);
+ if (ncacn_conn->iov == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto fail;
+ }
+
+ ncacn_conn->iov[ncacn_conn->count].iov_base = out->frag.data;
+ ncacn_conn->iov[ncacn_conn->count].iov_len = out->frag.length;
+
+ DEBUG(10, ("PDU number: %d, PDU Length: %u\n",
+ (unsigned int) ncacn_conn->count,
+ (unsigned int) ncacn_conn->iov[ncacn_conn->count].iov_len));
+ dump_data(11, (const uint8_t *) ncacn_conn->iov[ncacn_conn->count].iov_base,
+ ncacn_conn->iov[ncacn_conn->count].iov_len);
+ ncacn_conn->count++;
+ }
+
+ /*
+ * We still don't have a complete request, go back and wait for more
+ * data.
+ */
+ if (ncacn_conn->count == 0) {
+ /* Wait for the next packet */
+ subreq = dcerpc_ncacn_read_packet_send(ncacn_conn,
+ ncacn_conn->ev_ctx,
+ ncacn_conn->tstream);
+ if (subreq == NULL) {
+ DEBUG(2, ("Failed to start receving packets\n"));
+ status = NT_STATUS_NO_MEMORY;
+ goto fail;
+ }
+ tevent_req_set_callback(subreq, dcerpc_ncacn_packet_process, ncacn_conn);
+ return;
+ }
+
+ DEBUG(10, ("Sending a total of %u bytes\n",
+ (unsigned int)ncacn_conn->p->out_data.data_sent_length));
+
+ subreq = tstream_writev_queue_send(ncacn_conn,
+ ncacn_conn->ev_ctx,
+ ncacn_conn->tstream,
+ ncacn_conn->send_queue,
+ ncacn_conn->iov,
+ ncacn_conn->count);
+ if (subreq == NULL) {
+ DEBUG(2, ("Failed to send packet\n"));
+ status = NT_STATUS_NO_MEMORY;
+ goto fail;
+ }
+
+ tevent_req_set_callback(subreq, dcerpc_ncacn_packet_done, ncacn_conn);
+ return;
+
+fail:
+ DEBUG(2, ("Fatal error(%s). "
+ "Terminating client(%s) connection!\n",
+ nt_errstr(status), ncacn_conn->client_name));
+
+ /* Terminate client connection */
+ talloc_free(ncacn_conn);
+ return;
+}
+
+static void dcerpc_ncacn_packet_done(struct tevent_req *subreq)
+{
+ struct dcerpc_ncacn_conn *ncacn_conn =
+ tevent_req_callback_data(subreq, struct dcerpc_ncacn_conn);
+ int sys_errno;
+ int rc;
+
+ rc = tstream_writev_queue_recv(subreq, &sys_errno);
+ TALLOC_FREE(subreq);
+ if (rc < 0) {
+ DEBUG(2, ("Writev failed!\n"));
+ goto fail;
+ }
+
+ /* clear out any data that may have been left around */
+ ncacn_conn->count = 0;
+ TALLOC_FREE(ncacn_conn->iov);
+ data_blob_free(&ncacn_conn->p->in_data.data);
+ data_blob_free(&ncacn_conn->p->out_data.frag);
+ data_blob_free(&ncacn_conn->p->out_data.rdata);
+
+ /* Wait for the next packet */
+ subreq = dcerpc_ncacn_read_packet_send(ncacn_conn,
+ ncacn_conn->ev_ctx,
+ ncacn_conn->tstream);
+ if (subreq == NULL) {
+ DEBUG(2, ("Failed to start receving packets\n"));
+ sys_errno = ENOMEM;
+ goto fail;
+ }
+
+ tevent_req_set_callback(subreq, dcerpc_ncacn_packet_process, ncacn_conn);
+ return;
+
+fail:
+ DEBUG(2, ("Fatal error(%s). Terminating client(%s) connection!\n",
+ strerror(sys_errno), ncacn_conn->client_name));
+
+ /* Terminate client connection */
+ talloc_free(ncacn_conn);
+ return;
+}
+
+/* vim: set ts=8 sw=8 noet cindent syntax=c.doxygen: */
git.samba.org / metze / samba / wip.git / commitdiff