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Diffstat (limited to '')
| -rw-r--r-- | source4/libcli/raw/clisocket.c | 459 |
1 files changed, 459 insertions, 0 deletions
diff --git a/source4/libcli/raw/clisocket.c b/source4/libcli/raw/clisocket.c new file mode 100644 index 0000000..1959a93 --- /dev/null +++ b/source4/libcli/raw/clisocket.c @@ -0,0 +1,459 @@ +/* + Unix SMB/CIFS implementation. + + SMB client socket context management functions + + Copyright (C) Andrew Tridgell 1994-2005 + Copyright (C) James Myers 2003 <myersjj@samba.org> + + 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/>. +*/ + +#include "includes.h" +#include "system/network.h" +#include "../lib/async_req/async_sock.h" +#include "../lib/util/tevent_ntstatus.h" +#include "lib/events/events.h" +#include "libcli/raw/libcliraw.h" +#include "libcli/composite/composite.h" +#include "lib/socket/socket.h" +#include "libcli/resolve/resolve.h" +#include "param/param.h" +#include "libcli/raw/raw_proto.h" +#include "../libcli/smb/read_smb.h" + +struct smbcli_transport_connect_state { + struct tevent_context *ev; + struct socket_context *sock; + struct tevent_req *io_req; + uint8_t *request; + struct iovec iov; + uint8_t *response; +}; + +static void smbcli_transport_connect_cleanup(struct tevent_req *req, + enum tevent_req_state req_state); +static void smbcli_transport_connect_writev_done(struct tevent_req *subreq); +static void smbcli_transport_connect_read_smb_done(struct tevent_req *subreq); + +static struct tevent_req *smbcli_transport_connect_send(TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct socket_context *sock, + uint16_t port, + uint32_t timeout_msec, + struct nbt_name *calling, + struct nbt_name *called) +{ + struct tevent_req *req; + struct smbcli_transport_connect_state *state; + struct tevent_req *subreq; + DATA_BLOB calling_blob, called_blob; + uint8_t *p; + NTSTATUS status; + + req = tevent_req_create(mem_ctx, &state, + struct smbcli_transport_connect_state); + if (req == NULL) { + return NULL; + } + state->ev = ev; + state->sock = sock; + + if (port != 139) { + tevent_req_done(req); + return tevent_req_post(req, ev); + } + + tevent_req_set_cleanup_fn(req, smbcli_transport_connect_cleanup); + + status = nbt_name_to_blob(state, &calling_blob, calling); + if (tevent_req_nterror(req, status)) { + return tevent_req_post(req, ev); + } + + status = nbt_name_to_blob(state, &called_blob, called); + if (tevent_req_nterror(req, status)) { + return tevent_req_post(req, ev); + } + + state->request = talloc_array(state, uint8_t, + NBT_HDR_SIZE + + called_blob.length + + calling_blob.length); + if (tevent_req_nomem(state->request, req)) { + return tevent_req_post(req, ev); + } + + /* put in the destination name */ + p = state->request + NBT_HDR_SIZE; + memcpy(p, called_blob.data, called_blob.length); + p += called_blob.length; + + memcpy(p, calling_blob.data, calling_blob.length); + p += calling_blob.length; + + _smb_setlen_nbt(state->request, + PTR_DIFF(p, state->request) - NBT_HDR_SIZE); + SCVAL(state->request, 0, NBSSrequest); + + state->iov.iov_len = talloc_array_length(state->request); + state->iov.iov_base = (void *)state->request; + + subreq = writev_send(state, ev, NULL, + sock->fd, + true, /* err_on_readability */ + &state->iov, 1); + if (tevent_req_nomem(subreq, req)) { + return tevent_req_post(req, ev); + } + tevent_req_set_callback(subreq, + smbcli_transport_connect_writev_done, + req); + state->io_req = subreq; + + if (timeout_msec > 0) { + struct timeval endtime; + + endtime = timeval_current_ofs_msec(timeout_msec); + if (!tevent_req_set_endtime(req, ev, endtime)) { + return tevent_req_post(req, ev); + } + } + + return req; +} + +static void smbcli_transport_connect_cleanup(struct tevent_req *req, + enum tevent_req_state req_state) +{ + struct smbcli_transport_connect_state *state = + tevent_req_data(req, + struct smbcli_transport_connect_state); + + TALLOC_FREE(state->io_req); + + if (state->sock == NULL) { + return; + } + + if (state->sock->fd == -1) { + return; + } + + if (req_state == TEVENT_REQ_DONE) { + /* + * we keep the socket open for the caller to use + */ + state->sock = NULL; + return; + } + + close(state->sock->fd); + state->sock->fd = -1; + state->sock = NULL; +} + +static void smbcli_transport_connect_writev_done(struct tevent_req *subreq) +{ + struct tevent_req *req = + tevent_req_callback_data(subreq, + struct tevent_req); + struct smbcli_transport_connect_state *state = + tevent_req_data(req, + struct smbcli_transport_connect_state); + ssize_t ret; + int err; + + state->io_req = NULL; + + ret = writev_recv(subreq, &err); + TALLOC_FREE(subreq); + if (ret == -1) { + NTSTATUS status = map_nt_error_from_unix_common(err); + tevent_req_nterror(req, status); + return; + } + + subreq = read_smb_send(state, state->ev, + state->sock->fd); + if (tevent_req_nomem(subreq, req)) { + return; + } + tevent_req_set_callback(subreq, + smbcli_transport_connect_read_smb_done, + req); + state->io_req = subreq; +} + +static void smbcli_transport_connect_read_smb_done(struct tevent_req *subreq) +{ + struct tevent_req *req = + tevent_req_callback_data(subreq, + struct tevent_req); + struct smbcli_transport_connect_state *state = + tevent_req_data(req, + struct smbcli_transport_connect_state); + ssize_t ret; + int err; + NTSTATUS status; + uint8_t error; + + state->io_req = NULL; + + ret = read_smb_recv(subreq, state, + &state->response, &err); + TALLOC_FREE(subreq); + if (ret == -1) { + status = map_nt_error_from_unix_common(err); + tevent_req_nterror(req, status); + return; + } + + if (ret < 4) { + tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE); + return; + } + + switch (CVAL(state->response, 0)) { + case NBSSpositive: + tevent_req_done(req); + return; + + case NBSSnegative: + if (ret < 5) { + tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE); + return; + } + + error = CVAL(state->response, 4); + switch (error) { + case 0x80: + case 0x81: + status = NT_STATUS_REMOTE_NOT_LISTENING; + break; + case 0x82: + status = NT_STATUS_RESOURCE_NAME_NOT_FOUND; + break; + case 0x83: + status = NT_STATUS_REMOTE_RESOURCES; + break; + default: + status = NT_STATUS_INVALID_NETWORK_RESPONSE; + break; + } + break; + + case NBSSretarget: + DEBUG(1,("Warning: session retarget not supported\n")); + status = NT_STATUS_NOT_SUPPORTED; + break; + + default: + status = NT_STATUS_INVALID_NETWORK_RESPONSE; + break; + } + + tevent_req_nterror(req, status); +} + +static NTSTATUS smbcli_transport_connect_recv(struct tevent_req *req) +{ + return tevent_req_simple_recv_ntstatus(req); +} + +struct sock_connect_state { + struct composite_context *ctx; + const char *host_name; + int num_ports; + uint16_t *ports; + const char *socket_options; + struct smbcli_socket *result; + struct socket_connect_multi_ex multi_ex; + struct nbt_name calling; + struct nbt_name called; +}; + +/* + connect a smbcli_socket context to an IP/port pair + if port is 0 then choose 445 then 139 +*/ + +static struct tevent_req *smbcli_sock_establish_send(TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct socket_context *sock, + struct socket_address *addr, + void *private_data) +{ + struct sock_connect_state *state = + talloc_get_type_abort(private_data, + struct sock_connect_state); + uint32_t timeout_msec = 15 * 1000; + + return smbcli_transport_connect_send(state, + ev, + sock, + addr->port, + timeout_msec, + &state->calling, + &state->called); +} + +static NTSTATUS smbcli_sock_establish_recv(struct tevent_req *req) +{ + return smbcli_transport_connect_recv(req); +} + +static void smbcli_sock_connect_recv_conn(struct composite_context *ctx); + +struct composite_context *smbcli_sock_connect_send(TALLOC_CTX *mem_ctx, + const char *host_addr, + const char **ports, + const char *host_name, + struct resolve_context *resolve_ctx, + struct tevent_context *event_ctx, + const char *socket_options, + struct nbt_name *calling, + struct nbt_name *called) +{ + struct composite_context *result, *ctx; + struct sock_connect_state *state; + NTSTATUS status; + int i; + + result = talloc_zero(mem_ctx, struct composite_context); + if (result == NULL) goto failed; + result->state = COMPOSITE_STATE_IN_PROGRESS; + + result->event_ctx = event_ctx; + if (result->event_ctx == NULL) goto failed; + + state = talloc(result, struct sock_connect_state); + if (state == NULL) goto failed; + state->ctx = result; + result->private_data = state; + + state->host_name = talloc_strdup(state, host_name); + if (state->host_name == NULL) goto failed; + + state->num_ports = str_list_length(ports); + state->ports = talloc_array(state, uint16_t, state->num_ports); + if (state->ports == NULL) goto failed; + for (i=0;ports[i];i++) { + state->ports[i] = atoi(ports[i]); + } + state->socket_options = talloc_reference(state, socket_options); + + if (!host_addr) { + host_addr = host_name; + } + + state->multi_ex.private_data = state; + state->multi_ex.establish_send = smbcli_sock_establish_send; + state->multi_ex.establish_recv = smbcli_sock_establish_recv; + + status = nbt_name_dup(state, calling, &state->calling); + if (!NT_STATUS_IS_OK(status)) { + goto failed; + } + status = nbt_name_dup(state, called, &state->called); + if (!NT_STATUS_IS_OK(status)) { + goto failed; + } + + ctx = socket_connect_multi_ex_send(state, host_addr, + state->num_ports, state->ports, + resolve_ctx, + state->ctx->event_ctx, + &state->multi_ex); + if (ctx == NULL) goto failed; + ctx->async.fn = smbcli_sock_connect_recv_conn; + ctx->async.private_data = state; + return result; + +failed: + talloc_free(result); + return NULL; +} + +static void smbcli_sock_connect_recv_conn(struct composite_context *ctx) +{ + struct sock_connect_state *state = + talloc_get_type(ctx->async.private_data, + struct sock_connect_state); + struct socket_context *sock; + uint16_t port; + + state->ctx->status = socket_connect_multi_ex_recv(ctx, state, &sock, + &port); + if (!composite_is_ok(state->ctx)) return; + + state->ctx->status = + socket_set_option(sock, state->socket_options, NULL); + if (!composite_is_ok(state->ctx)) return; + + + state->result = talloc_zero(state, struct smbcli_socket); + if (composite_nomem(state->result, state->ctx)) return; + + state->result->sock = talloc_steal(state->result, sock); + state->result->port = port; + state->result->hostname = talloc_steal(sock, state->host_name); + + state->result->event.ctx = state->ctx->event_ctx; + if (composite_nomem(state->result->event.ctx, state->ctx)) return; + + composite_done(state->ctx); +} + +/* + finish a smbcli_sock_connect_send() operation +*/ +NTSTATUS smbcli_sock_connect_recv(struct composite_context *c, + TALLOC_CTX *mem_ctx, + struct smbcli_socket **result) +{ + NTSTATUS status = composite_wait(c); + if (NT_STATUS_IS_OK(status)) { + struct sock_connect_state *state = + talloc_get_type(c->private_data, + struct sock_connect_state); + *result = talloc_steal(mem_ctx, state->result); + } + talloc_free(c); + return status; +} + +/* + connect a smbcli_socket context to an IP/port pair + if port is 0 then choose the ports listed in smb.conf (normally 445 then 139) + + sync version of the function +*/ +NTSTATUS smbcli_sock_connect(TALLOC_CTX *mem_ctx, + const char *host_addr, const char **ports, + const char *host_name, + struct resolve_context *resolve_ctx, + struct tevent_context *event_ctx, + const char *socket_options, + struct nbt_name *calling, + struct nbt_name *called, + struct smbcli_socket **result) +{ + struct composite_context *c = + smbcli_sock_connect_send(mem_ctx, host_addr, ports, host_name, + resolve_ctx, + event_ctx, socket_options, + calling, called); + return smbcli_sock_connect_recv(c, mem_ctx, result); +} |