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9702dcfa91
data.
697 lines
18 KiB
C
697 lines
18 KiB
C
/*
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* traffic-analyzer VFS module. Measure the smb traffic users create
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* on the net.
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*
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* Copyright (C) Holger Hetterich, 2008
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* Copyright (C) Jeremy Allison, 2008
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "../lib/crypto/crypto.h"
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/* abstraction for the send_over_network function */
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enum sock_type {INTERNET_SOCKET = 0, UNIX_DOMAIN_SOCKET};
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#define LOCAL_PATHNAME "/var/tmp/stadsocket"
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/* VFS Functions identifier table. In protocol version 2, every vfs */
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/* function is given a unique id. */
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enum vfs_id {
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/* care for the order here, required for compatibility */
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/* with protocol version 1. */
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vfs_id_read,
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vfs_id_pread,
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vfs_id_write,
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vfs_id_pwrite,
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/* end of protocol version 1 identifiers. */
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vfs_id_mkdir,
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vfs_id_rmdir,
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vfs_id_rename,
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vfs_id_chdir
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};
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/* Specific data sets for the VFS functions. */
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struct mkdir_data {
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const char *path;
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mode_t mode;
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int result;
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};
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struct rmdir_data {
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const char *path;
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int result;
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};
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struct rename_data {
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const char *src;
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const char *dst;
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int result;
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};
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struct chdir_data {
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const char *path;
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int result;
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};
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/* rw_data used for read/write/pread/pwrite */
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struct rw_data {
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char *filename;
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size_t len;
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};
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static int vfs_smb_traffic_analyzer_debug_level = DBGC_VFS;
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static enum sock_type smb_traffic_analyzer_connMode(vfs_handle_struct *handle)
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{
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connection_struct *conn = handle->conn;
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const char *Mode;
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Mode=lp_parm_const_string(SNUM(conn), "smb_traffic_analyzer","mode", \
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"internet_socket");
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if (strstr(Mode,"unix_domain_socket")) {
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return UNIX_DOMAIN_SOCKET;
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} else {
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return INTERNET_SOCKET;
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}
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}
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/* Connect to an internet socket */
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static int smb_traffic_analyzer_connect_inet_socket(vfs_handle_struct *handle,
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const char *name, uint16_t port)
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{
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/* Create a streaming Socket */
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int sockfd = -1;
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struct addrinfo hints;
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struct addrinfo *ailist = NULL;
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struct addrinfo *res = NULL;
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int ret;
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ZERO_STRUCT(hints);
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/* By default make sure it supports TCP. */
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_flags = AI_ADDRCONFIG;
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ret = getaddrinfo(name,
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NULL,
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&hints,
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&ailist);
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if (ret) {
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DEBUG(3,("smb_traffic_analyzer_connect_inet_socket: "
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"getaddrinfo failed for name %s [%s]\n",
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name,
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gai_strerror(ret) ));
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return -1;
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}
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DEBUG(3,("smb_traffic_analyzer: Internet socket mode. Hostname: %s,"
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"Port: %i\n", name, port));
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for (res = ailist; res; res = res->ai_next) {
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struct sockaddr_storage ss;
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NTSTATUS status;
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if (!res->ai_addr || res->ai_addrlen == 0) {
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continue;
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}
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ZERO_STRUCT(ss);
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memcpy(&ss, res->ai_addr, res->ai_addrlen);
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status = open_socket_out(&ss, port, 10000, &sockfd);
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if (NT_STATUS_IS_OK(status)) {
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break;
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}
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}
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if (ailist) {
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freeaddrinfo(ailist);
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}
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if (sockfd == -1) {
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DEBUG(1, ("smb_traffic_analyzer: unable to create "
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"socket, error is %s",
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strerror(errno)));
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return -1;
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}
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return sockfd;
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}
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/* Connect to a unix domain socket */
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static int smb_traffic_analyzer_connect_unix_socket(vfs_handle_struct *handle,
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const char *name)
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{
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/* Create the socket to stad */
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int len, sock;
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struct sockaddr_un remote;
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DEBUG(7, ("smb_traffic_analyzer_connect_unix_socket: "
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"Unix domain socket mode. Using %s\n",
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name ));
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if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
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DEBUG(1, ("smb_traffic_analyzer_connect_unix_socket: "
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"Couldn't create socket, "
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"make sure stad is running!\n"));
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return -1;
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}
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remote.sun_family = AF_UNIX;
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strlcpy(remote.sun_path, name,
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sizeof(remote.sun_path));
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len=strlen(remote.sun_path) + sizeof(remote.sun_family);
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if (connect(sock, (struct sockaddr *)&remote, len) == -1 ) {
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DEBUG(1, ("smb_traffic_analyzer_connect_unix_socket: "
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"Could not connect to "
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"socket, make sure\nstad is running!\n"));
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close(sock);
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return -1;
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}
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return sock;
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}
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/* Private data allowing shared connection sockets. */
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struct refcounted_sock {
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struct refcounted_sock *next, *prev;
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char *name;
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uint16_t port;
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int sock;
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unsigned int ref_count;
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};
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/* The marshaller for the protocol version 2. */
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static char *smb_traffic_analyzer_create_string( struct tm *tm, \
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int seconds, vfs_handle_struct *handle, \
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char *username, int vfs_operation, int count, ... )
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{
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va_list ap;
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char *arg = NULL;
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char *str = NULL;
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int len;
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char *header = NULL;
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char *buf = NULL;
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char *timestr = NULL;
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char *opstr = NULL;
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char *userSID = NULL;
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/* first create the data that is transfered with any VFS op */
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opstr = talloc_asprintf(talloc_tos(), "%i", vfs_operation);
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len = strlen(opstr);
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buf = talloc_asprintf(talloc_tos(), "%04u%s", len, opstr);
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len = strlen( username );
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buf = talloc_asprintf_append(buf, "%04u%s", len, username);
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userSID = dom_sid_string( talloc_tos(),
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&handle->conn->server_info->ptok->user_sids[0]);
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len = strlen( userSID );
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buf = talloc_asprintf_append(buf, "%04u%s", len, userSID);
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len = strlen( handle->conn->connectpath );
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buf = talloc_asprintf_append( buf, "%04u%s", len, \
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handle->conn->connectpath );
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len = strlen( pdb_get_domain(handle->conn->server_info->sam_account) );
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buf = talloc_asprintf_append( buf, "%04u%s", len, \
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pdb_get_domain(handle->conn->server_info->sam_account) );
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timestr = talloc_asprintf(talloc_tos(), \
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"%04d-%02d-%02d %02d:%02d:%02d.%03d", \
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tm->tm_year+1900, \
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tm->tm_mon+1, \
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tm->tm_mday, \
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tm->tm_hour, \
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tm->tm_min, \
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tm->tm_sec, \
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(int)seconds);
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len = strlen( timestr );
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buf = talloc_asprintf_append( buf, "%04u%s", len, timestr);
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va_start( ap, count );
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while ( count-- ) {
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arg = va_arg( ap, char * );
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/* protocol v2 sends a four byte string */
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/* as a header to each block, including */
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/* the numbers of bytes to come in the */
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/* next string. */
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len = strlen( arg );
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buf = talloc_asprintf_append( buf, "%04u%s", len, arg);
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}
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va_end( ap );
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/* now create the protocol v2 header. */
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len = strlen( buf );
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str = talloc_asprintf_append( str, "V2,%017u%s", len, buf);
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DEBUG(10, ("smb_traffic_analyzer_create_string: %s\n",str));
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return str;
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}
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static void smb_traffic_analyzer_send_data(vfs_handle_struct *handle,
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void *data,
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enum vfs_id vfs_operation )
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{
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struct refcounted_sock *rf_sock = NULL;
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struct timeval tv;
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time_t tv_sec;
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struct tm *tm = NULL;
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int seconds;
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char *str = NULL;
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char *username = NULL;
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const char *anon_prefix = NULL;
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const char *total_anonymization = NULL;
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const char *protocol_version = NULL;
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bool Write = false;
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size_t len;
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SMB_VFS_HANDLE_GET_DATA(handle, rf_sock, struct refcounted_sock, return);
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if (rf_sock == NULL || rf_sock->sock == -1) {
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DEBUG(1, ("smb_traffic_analyzer_send_data: socket is "
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"closed\n"));
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return;
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}
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GetTimeOfDay(&tv);
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tv_sec = convert_timespec_to_time_t(convert_timeval_to_timespec(tv));
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tm = localtime(&tv_sec);
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if (!tm) {
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return;
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}
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seconds=(float) (tv.tv_usec / 1000);
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/* check if anonymization is required */
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total_anonymization=lp_parm_const_string(SNUM(handle->conn),"smb_traffic_analyzer",
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"total_anonymization", NULL);
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anon_prefix=lp_parm_const_string(SNUM(handle->conn),"smb_traffic_analyzer",\
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"anonymize_prefix", NULL );
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if (anon_prefix!=NULL) {
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if (total_anonymization!=NULL) {
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username = talloc_asprintf(talloc_tos(),
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"%s",
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anon_prefix);
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} else {
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username = talloc_asprintf(talloc_tos(),
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"%s%i",
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anon_prefix,
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str_checksum(
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handle->conn->server_info->sanitized_username ) );
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}
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} else {
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username = handle->conn->server_info->sanitized_username;
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}
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if (!username) {
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return;
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}
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protocol_version = lp_parm_const_string(SNUM(handle->conn),
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"smb_traffic_analyzer",
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"protocol_version", NULL );
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if ( protocol_version == NULL || strcmp( protocol_version,"V1") == 0) {
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struct rw_data *s_data = (struct rw_data *) data;
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/* in case of protocol v1, ignore any vfs operations */
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/* except read,pread,write,pwrite, and set the "Write" */
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/* bool accordingly. */
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if ( vfs_operation > vfs_id_pwrite ) return;
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if ( vfs_operation <= vfs_id_pread ) Write=false;
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else Write=true;
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str = talloc_asprintf(talloc_tos(),
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"V1,%u,\"%s\",\"%s\",\"%c\",\"%s\",\"%s\","
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"\"%04d-%02d-%02d %02d:%02d:%02d.%03d\"\n",
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(unsigned int) s_data->len,
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username,
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pdb_get_domain(handle->conn->server_info->sam_account),
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Write ? 'W' : 'R',
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handle->conn->connectpath,
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s_data->filename,
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tm->tm_year+1900,
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tm->tm_mon+1,
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tm->tm_mday,
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tm->tm_hour,
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tm->tm_min,
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tm->tm_sec,
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(int)seconds);
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} else if ( strcmp( protocol_version, "V2") == 0) {
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switch( vfs_operation ) {
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case vfs_id_mkdir: ;
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str = smb_traffic_analyzer_create_string( tm, \
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seconds, handle, username, vfs_id_mkdir, 3,\
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((struct mkdir_data *) data)->path, \
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talloc_asprintf( talloc_tos(), "%u", \
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((struct mkdir_data *) data)->mode), \
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talloc_asprintf( talloc_tos(), "%u", \
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((struct mkdir_data *) data)->result ));
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break;
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case vfs_id_rmdir: ;
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str = smb_traffic_analyzer_create_string( tm, \
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seconds, handle, username, vfs_id_rmdir, 2,\
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((struct rmdir_data *) data)->path, \
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talloc_asprintf( talloc_tos(), "%u", \
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((struct rmdir_data *) data)->result ));
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break;
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case vfs_id_rename: ;
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str = smb_traffic_analyzer_create_string( tm, \
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seconds, handle, username, vfs_id_rename, 3,\
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((struct rename_data *) data)->src, \
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((struct rename_data *) data)->dst,
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talloc_asprintf(talloc_tos(), "%u", \
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((struct rename_data *) data)->result));
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break;
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case vfs_id_chdir: ;
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str = smb_traffic_analyzer_create_string( tm, \
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seconds, handle, username, vfs_id_chdir, 2,\
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((struct chdir_data *) data)->path, \
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talloc_asprintf(talloc_tos(), "%u", \
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((struct chdir_data *) data)->result));
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break;
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case vfs_id_write:
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case vfs_id_pwrite:
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case vfs_id_read:
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case vfs_id_pread: ;
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str = smb_traffic_analyzer_create_string( tm, \
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seconds, handle, username, vfs_operation, 2,\
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((struct rw_data *) data)->filename, \
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talloc_asprintf(talloc_tos(), "%u", \
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((struct rw_data *) data)->len));
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break;
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default:
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DEBUG(1, ("smb_traffic_analyzer: error! "
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"wrong VFS operation id detected!\n"));
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return;
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}
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} else {
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DEBUG(1, ("smb_traffic_analyzer_send_data_socket: "
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"error, unkown protocol given!\n"));
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return;
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}
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if (!str) {
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DEBUG(1, ("smb_traffic_analyzer_send_data: "
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"unable to create string to send!\n"));
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return;
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}
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len = strlen(str);
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DEBUG(10, ("smb_traffic_analyzer_send_data_socket: going to send "
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"%s\n", str));
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/* If configured, optain the key and run AES encryption */
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/* over the data. */
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size_t size;
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char *akey = secrets_fetch("smb_traffic_analyzer_key", &size);
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if ( akey != NULL ) {
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char *crypted;
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DEBUG(10, ("smb_traffic_analyzer: a key was found, encrypting "
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"data!"));
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AES_KEY *key;
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samba_AES_set_encrypt_key(akey, 128, key);
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samba_AES_encrypt( str, crypted, key );
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len = strlen( crypted );
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if (write_data(rf_sock->sock, crypted, len) != len) {
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DEBUG(1, ("smb_traffic_analyzer_send_data_socket: "
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"error sending crypted data to socket!\n"));
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free( crypted );
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return ;
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}
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}
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if (write_data(rf_sock->sock, str, len) != len) {
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DEBUG(1, ("smb_traffic_analyzer_send_data_socket: "
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"error sending data to socket!\n"));
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return ;
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}
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}
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static struct refcounted_sock *sock_list;
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static void smb_traffic_analyzer_free_data(void **pptr)
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{
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struct refcounted_sock *rf_sock = *(struct refcounted_sock **)pptr;
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if (rf_sock == NULL) {
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return;
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}
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rf_sock->ref_count--;
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if (rf_sock->ref_count != 0) {
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return;
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}
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if (rf_sock->sock != -1) {
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close(rf_sock->sock);
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}
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DLIST_REMOVE(sock_list, rf_sock);
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TALLOC_FREE(rf_sock);
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}
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static int smb_traffic_analyzer_connect(struct vfs_handle_struct *handle,
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const char *service,
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const char *user)
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{
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connection_struct *conn = handle->conn;
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enum sock_type st = smb_traffic_analyzer_connMode(handle);
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struct refcounted_sock *rf_sock = NULL;
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const char *name = (st == UNIX_DOMAIN_SOCKET) ? LOCAL_PATHNAME :
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lp_parm_const_string(SNUM(conn),
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"smb_traffic_analyzer",
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"host", "localhost");
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uint16_t port = (st == UNIX_DOMAIN_SOCKET) ? 0 :
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atoi( lp_parm_const_string(SNUM(conn),
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"smb_traffic_analyzer", "port", "9430"));
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int ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
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if (ret < 0) {
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return ret;
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}
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/* Are we already connected ? */
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for (rf_sock = sock_list; rf_sock; rf_sock = rf_sock->next) {
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if (port == rf_sock->port &&
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(strcmp(name, rf_sock->name) == 0)) {
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break;
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}
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}
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/* If we're connected already, just increase the
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* reference count. */
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if (rf_sock) {
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rf_sock->ref_count++;
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} else {
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/* New connection. */
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|
rf_sock = TALLOC_ZERO_P(NULL, struct refcounted_sock);
|
|
if (rf_sock == NULL) {
|
|
SMB_VFS_NEXT_DISCONNECT(handle);
|
|
errno = ENOMEM;
|
|
return -1;
|
|
}
|
|
rf_sock->name = talloc_strdup(rf_sock, name);
|
|
if (rf_sock->name == NULL) {
|
|
SMB_VFS_NEXT_DISCONNECT(handle);
|
|
TALLOC_FREE(rf_sock);
|
|
errno = ENOMEM;
|
|
return -1;
|
|
}
|
|
rf_sock->port = port;
|
|
rf_sock->ref_count = 1;
|
|
|
|
if (st == UNIX_DOMAIN_SOCKET) {
|
|
rf_sock->sock = smb_traffic_analyzer_connect_unix_socket(handle,
|
|
name);
|
|
} else {
|
|
|
|
rf_sock->sock = smb_traffic_analyzer_connect_inet_socket(handle,
|
|
name,
|
|
port);
|
|
}
|
|
if (rf_sock->sock == -1) {
|
|
SMB_VFS_NEXT_DISCONNECT(handle);
|
|
TALLOC_FREE(rf_sock);
|
|
return -1;
|
|
}
|
|
DLIST_ADD(sock_list, rf_sock);
|
|
}
|
|
|
|
/* Store the private data. */
|
|
SMB_VFS_HANDLE_SET_DATA(handle, rf_sock, smb_traffic_analyzer_free_data,
|
|
struct refcounted_sock, return -1);
|
|
return 0;
|
|
}
|
|
|
|
/* VFS Functions */
|
|
static int smb_traffic_analyzer_chdir(vfs_handle_struct *handle, \
|
|
const char *path)
|
|
{
|
|
struct chdir_data s_data;
|
|
s_data.result = SMB_VFS_NEXT_CHDIR(handle, path);
|
|
s_data.path = path;
|
|
DEBUG(10, ("smb_traffic_analyzer_chdir: CHDIR: %s\n", path));
|
|
smb_traffic_analyzer_send_data(handle, &s_data, vfs_id_chdir);
|
|
return s_data.result;
|
|
}
|
|
|
|
static int smb_traffic_analyzer_rename(vfs_handle_struct *handle, \
|
|
const struct smb_filename *smb_fname_src,
|
|
const struct smb_filename *smb_fname_dst)
|
|
{
|
|
struct rename_data s_data;
|
|
s_data.result = SMB_VFS_NEXT_RENAME(handle, smb_fname_src, \
|
|
smb_fname_dst);
|
|
s_data.src = smb_fname_src->base_name;
|
|
s_data.dst = smb_fname_dst->base_name;
|
|
DEBUG(10, ("smb_traffic_analyzer_rename: RENAME: %s / %s\n",
|
|
smb_fname_src->base_name,
|
|
smb_fname_dst->base_name));
|
|
smb_traffic_analyzer_send_data(handle, &s_data, vfs_id_rename);
|
|
return s_data.result;
|
|
}
|
|
|
|
static int smb_traffic_analyzer_rmdir(vfs_handle_struct *handle, \
|
|
const char *path)
|
|
{
|
|
struct rmdir_data s_data;
|
|
s_data.result = SMB_VFS_NEXT_RMDIR(handle, path);
|
|
s_data.path = path;
|
|
DEBUG(10, ("smb_traffic_analyzer_rmdir: RMDIR: %s\n", path));
|
|
smb_traffic_analyzer_send_data(handle, &s_data, vfs_id_rmdir);
|
|
return s_data.result;
|
|
}
|
|
|
|
static int smb_traffic_analyzer_mkdir(vfs_handle_struct *handle, \
|
|
const char *path, mode_t mode)
|
|
{
|
|
struct mkdir_data s_data;
|
|
s_data.result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
|
|
s_data.path = path;
|
|
s_data.mode = mode;
|
|
DEBUG(10, ("smb_traffic_analyzer_mkdir: MKDIR: %s\n", path));
|
|
smb_traffic_analyzer_send_data(handle,
|
|
&s_data,
|
|
vfs_id_mkdir);
|
|
return s_data.result;
|
|
}
|
|
|
|
static ssize_t smb_traffic_analyzer_read(vfs_handle_struct *handle, \
|
|
files_struct *fsp, void *data, size_t n)
|
|
{
|
|
struct rw_data s_data;
|
|
|
|
s_data.len = SMB_VFS_NEXT_READ(handle, fsp, data, n);
|
|
s_data.filename = fsp->fsp_name->base_name;
|
|
DEBUG(10, ("smb_traffic_analyzer_read: READ: %s\n", fsp_str_dbg(fsp)));
|
|
|
|
smb_traffic_analyzer_send_data(handle,
|
|
&s_data,
|
|
vfs_id_read);
|
|
return s_data.len;
|
|
}
|
|
|
|
|
|
static ssize_t smb_traffic_analyzer_pread(vfs_handle_struct *handle, \
|
|
files_struct *fsp, void *data, size_t n, SMB_OFF_T offset)
|
|
{
|
|
struct rw_data s_data;
|
|
|
|
s_data.len = SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
|
|
s_data.filename = fsp->fsp_name->base_name;
|
|
DEBUG(10, ("smb_traffic_analyzer_pread: PREAD: %s\n",
|
|
fsp_str_dbg(fsp)));
|
|
|
|
smb_traffic_analyzer_send_data(handle,
|
|
&s_data,
|
|
vfs_id_pread);
|
|
|
|
return s_data.len;
|
|
}
|
|
|
|
static ssize_t smb_traffic_analyzer_write(vfs_handle_struct *handle, \
|
|
files_struct *fsp, const void *data, size_t n)
|
|
{
|
|
struct rw_data s_data;
|
|
|
|
s_data.len = SMB_VFS_NEXT_WRITE(handle, fsp, data, n);
|
|
s_data.filename = fsp->fsp_name->base_name;
|
|
DEBUG(10, ("smb_traffic_analyzer_write: WRITE: %s\n",
|
|
fsp_str_dbg(fsp)));
|
|
|
|
smb_traffic_analyzer_send_data(handle,
|
|
&s_data,
|
|
vfs_id_write);
|
|
return s_data.len;
|
|
}
|
|
|
|
static ssize_t smb_traffic_analyzer_pwrite(vfs_handle_struct *handle, \
|
|
files_struct *fsp, const void *data, size_t n, SMB_OFF_T offset)
|
|
{
|
|
struct rw_data s_data;
|
|
|
|
s_data.len = SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
|
|
s_data.filename = fsp->fsp_name->base_name;
|
|
DEBUG(10, ("smb_traffic_analyzer_pwrite: PWRITE: %s\n", \
|
|
fsp_str_dbg(fsp)));
|
|
|
|
smb_traffic_analyzer_send_data(handle,
|
|
&s_data,
|
|
vfs_id_pwrite);
|
|
return s_data.len;
|
|
}
|
|
|
|
static struct vfs_fn_pointers vfs_smb_traffic_analyzer_fns = {
|
|
.connect_fn = smb_traffic_analyzer_connect,
|
|
.vfs_read = smb_traffic_analyzer_read,
|
|
.pread = smb_traffic_analyzer_pread,
|
|
.write = smb_traffic_analyzer_write,
|
|
.pwrite = smb_traffic_analyzer_pwrite,
|
|
.mkdir = smb_traffic_analyzer_mkdir,
|
|
.rename = smb_traffic_analyzer_rename,
|
|
.chdir = smb_traffic_analyzer_chdir
|
|
};
|
|
|
|
/* Module initialization */
|
|
|
|
NTSTATUS vfs_smb_traffic_analyzer_init(void)
|
|
{
|
|
NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
|
|
"smb_traffic_analyzer",
|
|
&vfs_smb_traffic_analyzer_fns);
|
|
|
|
if (!NT_STATUS_IS_OK(ret)) {
|
|
return ret;
|
|
}
|
|
|
|
vfs_smb_traffic_analyzer_debug_level =
|
|
debug_add_class("smb_traffic_analyzer");
|
|
|
|
if (vfs_smb_traffic_analyzer_debug_level == -1) {
|
|
vfs_smb_traffic_analyzer_debug_level = DBGC_VFS;
|
|
DEBUG(1, ("smb_traffic_analyzer_init: Couldn't register custom"
|
|
"debugging class!\n"));
|
|
} else {
|
|
DEBUG(3, ("smb_traffic_analyzer_init: Debug class number of"
|
|
"'smb_traffic_analyzer': %d\n", \
|
|
vfs_smb_traffic_analyzer_debug_level));
|
|
}
|
|
|
|
return ret;
|
|
}
|