From a32c9262894f73b91d10db30bb6e7085d6bacd87 Mon Sep 17 00:00:00 2001 From: Andrew Tridgell Date: Sat, 17 Apr 1999 14:06:57 +0000 Subject: damn, new files need to be added to the head branch first, I've told other people this before then forgot myself :) (This used to be commit a116228d37fdd18979caec6765394e79be49fa99) --- source3/Makefile.in | 10 ++ source3/utils/smbfilter.c | 233 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 243 insertions(+) create mode 100644 source3/utils/smbfilter.c (limited to 'source3') diff --git a/source3/Makefile.in b/source3/Makefile.in index e473700f4d..3dff0ccf95 100644 --- a/source3/Makefile.in +++ b/source3/Makefile.in @@ -270,6 +270,9 @@ DEBUG2HTML_OBJ = utils/debug2html.o $(PARAM_OBJ) $(LIB_OBJ) SMBTORTURE_OBJ = utils/torture.o $(LIBSMB_OBJ) $(PARAM_OBJ) \ $(UBIQX_OBJ) $(LIB_OBJ) +SMBFILTER_OBJ = utils/filter.o $(LIBSMB_OBJ) $(PARAM_OBJ) \ + $(UBIQX_OBJ) $(LIB_OBJ) + RPCTORTURE_OBJ = utils/rpctorture.o \ rpcclient/display.o \ rpcclient/cmd_lsarpc.o \ @@ -299,6 +302,9 @@ smbtorture : CHECK bin/smbtorture rpctorture : CHECK bin/rpctorture +smbfilter : CHECK bin/smbfilter + + .SUFFIXES: .SUFFIXES: .c .o .po .po32 @@ -436,6 +442,10 @@ bin/rpctorture: $(RPCTORTURE_OBJ) bin/.dummy @echo Linking $@ @$(CC) $(FLAGS) -o $@ $(RPCTORTURE_OBJ) $(LDFLAGS) $(LIBS) +bin/smbfilter: $(SMBFILTER_OBJ) bin/.dummy + @echo Linking $@ + @$(CC) $(FLAGS) -o $@ $(SMBFILTER_OBJ) $(LDFLAGS) $(LIBS) + bin/debug2html: $(DEBUG2HTML_OBJ) bin/.dummy @echo Linking $@ @$(CC) $(FLAGS) -o $@ $(DEBUG2HTML_OBJ) $(LDFLAGS) $(LIBS) diff --git a/source3/utils/smbfilter.c b/source3/utils/smbfilter.c new file mode 100644 index 0000000000..81b10e4519 --- /dev/null +++ b/source3/utils/smbfilter.c @@ -0,0 +1,233 @@ +/* + Unix SMB/Netbios implementation. + Version 2 + SMB filter/socket plugin + Copyright (C) Andrew Tridgell 1999 + + 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 2 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, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#include "includes.h" +#include "smb.h" + +#define SECURITY_MASK 0 +#define SECURITY_SET 0 + +/* this forces non-unicode */ +#define CAPABILITY_MASK CAP_UNICODE +#define CAPABILITY_SET 0 + +/* and non-unicode for the client too */ +#define CLI_CAPABILITY_MASK CAP_UNICODE +#define CLI_CAPABILITY_SET 0 + +static char *netbiosname; +static char packet[BUFFER_SIZE]; + +extern int DEBUGLEVEL; + +static void filter_reply(char *buf) +{ + int msg_type = CVAL(buf,0); + int type = CVAL(buf,smb_com); + unsigned x; + + if (msg_type) return; + + switch (type) { + + case SMBnegprot: + /* force the security bits */ + x = CVAL(buf, smb_vwv1); + x = (x | SECURITY_SET) & ~SECURITY_MASK; + SCVAL(buf, smb_vwv1, x); + + /* force the capabilities */ + x = IVAL(buf,smb_vwv9+1); + x = (x | CAPABILITY_SET) & ~CAPABILITY_MASK; + SIVAL(buf, smb_vwv9+1, x); + break; + + } +} + +static void filter_request(char *buf) +{ + int msg_type = CVAL(buf,0); + int type = CVAL(buf,smb_com); + pstring name1,name2; + unsigned x; + + if (msg_type) { + /* it's a netbios special */ + switch (msg_type) { + case 0x81: + /* session request */ + name_extract(buf,4,name1); + name_extract(buf,4 + name_len(buf + 4),name2); + DEBUG(0,("sesion_request: %s -> %s\n", + name1, name2)); + if (netbiosname) { + /* replace the destination netbios name */ + name_mangle(netbiosname, buf+4, 0x20); + } + } + return; + } + + /* it's an ordinary SMB request */ + switch (type) { + case SMBsesssetupX: + /* force the client capabilities */ + x = IVAL(buf,smb_vwv11); + x = (x | CLI_CAPABILITY_SET) & ~CLI_CAPABILITY_MASK; + SIVAL(buf, smb_vwv11, x); + break; + } + +} + + +static void filter_child(int c, struct in_addr dest_ip) +{ + int s; + + /* we have a connection from a new client, now connect to the server */ + s = open_socket_out(SOCK_STREAM, &dest_ip, 139, LONG_CONNECT_TIMEOUT); + + if (s == -1) { + DEBUG(0,("Unable to connect to %s\n", inet_ntoa(dest_ip))); + exit(1); + } + + while (c != -1 || s != -1) { + fd_set fds; + int num; + + FD_ZERO(&fds); + if (s != -1) FD_SET(s, &fds); + if (c != -1) FD_SET(c, &fds); + + num = sys_select(MAX(s+1, c+1),&fds,NULL); + if (num <= 0) continue; + + if (c != -1 && FD_ISSET(c, &fds)) { + if (!receive_smb(c, packet, 0)) { + DEBUG(0,("client closed connection\n")); + exit(0); + } + filter_request(packet); + if (!send_smb(s, packet)) { + DEBUG(0,("server is dead\n")); + exit(1); + } + } + if (s != -1 && FD_ISSET(s, &fds)) { + if (!receive_smb(s, packet, 0)) { + DEBUG(0,("server closed connection\n")); + exit(0); + } + filter_reply(packet); + if (!send_smb(c, packet)) { + DEBUG(0,("client is dead\n")); + exit(1); + } + } + } + DEBUG(0,("Connection closed\n")); + exit(0); +} + + +static void start_filter(char *desthost) +{ + int s, c; + struct in_addr dest_ip; + + CatchChild(); + + /* start listening on port 139 locally */ + s = open_socket_in(SOCK_STREAM, 139, 0, 0, True); + + if (s == -1) { + DEBUG(0,("bind failed\n")); + exit(1); + } + + if (listen(s, 5) == -1) { + DEBUG(0,("listen failed\n")); + } + + if (!resolve_name(desthost, &dest_ip, 0x20)) { + DEBUG(0,("Unable to resolve host %s\n", desthost)); + exit(1); + } + + while (1) { + fd_set fds; + int num; + struct sockaddr addr; + int in_addrlen = sizeof(addr); + + FD_ZERO(&fds); + FD_SET(s, &fds); + + num = sys_select(s+1,&fds,NULL); + if (num > 0) { + c = accept(s, &addr, &in_addrlen); + if (c != -1) { + if (fork() == 0) { + close(s); + filter_child(c, dest_ip); + exit(0); + } else { + close(c); + } + } + } + } +} + + +int main(int argc, char *argv[]) +{ + char *desthost; + pstring configfile; + + TimeInit(); + + setup_logging(argv[0],True); + + charset_initialise(); + + pstrcpy(configfile,CONFIGFILE); + + if (argc < 2) { + fprintf(stderr,"smbfilter \n"); + exit(1); + } + + desthost = argv[1]; + if (argc > 2) { + netbiosname = argv[2]; + } + + if (!lp_load(configfile,True,False,False)) { + DEBUG(0,("Unable to load config file\n")); + } + + start_filter(desthost); + return 0; +} -- cgit