diff options
Diffstat (limited to 'libcli')
| -rw-r--r-- | libcli/smb/read_smb.c | 112 | ||||
| -rw-r--r-- | libcli/smb/read_smb.h | 33 | ||||
| -rw-r--r-- | libcli/smb/wscript_build | 5 |
3 files changed, 148 insertions, 2 deletions
diff --git a/libcli/smb/read_smb.c b/libcli/smb/read_smb.c new file mode 100644 index 0000000000..26816c3be3 --- /dev/null +++ b/libcli/smb/read_smb.c @@ -0,0 +1,112 @@ +/* + Unix SMB/CIFS implementation. + Infrastructure for async SMB client requests + Copyright (C) Volker Lendecke 2008 + + 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 "read_smb.h" +#include "lib/util/tevent_unix.h" +#include "libcli/smb/smb_constants.h" + +/* + * Read an smb packet asynchronously, discard keepalives + */ + +struct read_smb_state { + struct tevent_context *ev; + int fd; + uint8_t *buf; +}; + +static ssize_t read_smb_more(uint8_t *buf, size_t buflen, void *private_data); +static void read_smb_done(struct tevent_req *subreq); + +struct tevent_req *read_smb_send(TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + int fd) +{ + struct tevent_req *result, *subreq; + struct read_smb_state *state; + + result = tevent_req_create(mem_ctx, &state, struct read_smb_state); + if (result == NULL) { + return NULL; + } + state->ev = ev; + state->fd = fd; + + subreq = read_packet_send(state, ev, fd, 4, read_smb_more, NULL); + if (subreq == NULL) { + goto fail; + } + tevent_req_set_callback(subreq, read_smb_done, result); + return result; + fail: + TALLOC_FREE(result); + return NULL; +} + +static ssize_t read_smb_more(uint8_t *buf, size_t buflen, void *private_data) +{ + if (buflen > 4) { + return 0; /* We've been here, we're done */ + } + return smb_len_tcp(buf); +} + +static void read_smb_done(struct tevent_req *subreq) +{ + struct tevent_req *req = tevent_req_callback_data( + subreq, struct tevent_req); + struct read_smb_state *state = tevent_req_data( + req, struct read_smb_state); + ssize_t len; + int err; + + len = read_packet_recv(subreq, state, &state->buf, &err); + TALLOC_FREE(subreq); + if (len == -1) { + tevent_req_error(req, err); + return; + } + + if (CVAL(state->buf, 0) == NBSSkeepalive) { + subreq = read_packet_send(state, state->ev, state->fd, 4, + read_smb_more, NULL); + if (tevent_req_nomem(subreq, req)) { + return; + } + tevent_req_set_callback(subreq, read_smb_done, req); + return; + } + tevent_req_done(req); +} + +ssize_t read_smb_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx, + uint8_t **pbuf, int *perrno) +{ + struct read_smb_state *state = tevent_req_data( + req, struct read_smb_state); + + if (tevent_req_is_unix_error(req, perrno)) { + return -1; + } + *pbuf = talloc_move(mem_ctx, &state->buf); + return talloc_get_size(*pbuf); +} diff --git a/libcli/smb/read_smb.h b/libcli/smb/read_smb.h new file mode 100644 index 0000000000..ae4dfdd63a --- /dev/null +++ b/libcli/smb/read_smb.h @@ -0,0 +1,33 @@ +/* + Unix SMB/CIFS implementation. + Infrastructure for async SMB client requests + Copyright (C) Volker Lendecke 2008 + + 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/>. +*/ + +#ifndef __LIBSMB_READ_SMB_H +#define __LIBSMB_READ_SMB_H + +#include "lib/talloc/talloc.h" +#include "lib/tevent/tevent.h" + +struct tevent_req *read_smb_send(TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + int fd); + +ssize_t read_smb_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx, + uint8_t **pbuf, int *perrno); + +#endif diff --git a/libcli/smb/wscript_build b/libcli/smb/wscript_build index 63349586f4..9339b96044 100644 --- a/libcli/smb/wscript_build +++ b/libcli/smb/wscript_build @@ -2,13 +2,14 @@ bld.SAMBA_LIBRARY('cli_smb_common', - source='smb_seal.c smb2_create_blob.c smb2_signing.c util.c', + source='smb_seal.c smb2_create_blob.c smb2_signing.c util.c read_smb.c', autoproto='smb_common_proto.h', - deps='LIBCRYPTO errors gssapi gensec KRB5_WRAP', + deps='LIBCRYPTO errors gssapi gensec KRB5_WRAP LIBASYNC_REQ', public_deps='talloc samba-util', private_library=True, public_headers='''smb_common.h smb2_constants.h smb_constants.h smb_seal.h smb2_create_blob.h smb2_signing.h smb_util.h smb_unix_ext.h + read_smb.h ''', ) |