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/*
Unix SMB/CIFS implementation.
client dgram calls
Copyright (C) Andrew Tridgell 1994-1998
Copyright (C) Richard Sharpe 2001
Copyright (C) John Terpstra 2001
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"
/*
* cli_send_mailslot, send a mailslot for client code ...
*/
int cli_send_mailslot(int dgram_sock, BOOL unique, char *mailslot,
char *buf, int len,
const char *srcname, int src_type,
const char *dstname, int dest_type,
struct in_addr dest_ip, struct in_addr src_ip,
int dest_port, int src_port)
{
struct packet_struct p;
struct dgram_packet *dgram = &p.packet.dgram;
char *ptr, *p2;
char tmp[4];
memset((char *)&p, '\0', sizeof(p));
/*
* Next, build the DGRAM ...
*/
/* DIRECT GROUP or UNIQUE datagram. */
dgram->header.msg_type = unique ? 0x10 : 0x11;
dgram->header.flags.node_type = M_NODE;
dgram->header.flags.first = True;
dgram->header.flags.more = False;
dgram->header.dgm_id = ((unsigned)time(NULL)%(unsigned)0x7FFF) + ((unsigned)sys_getpid()%(unsigned)100);
dgram->header.source_ip.s_addr = src_ip.s_addr;
dgram->header.source_port = ntohs(src_port);
dgram->header.dgm_length = 0; /* Let build_dgram() handle this. */
dgram->header.packet_offset = 0;
make_nmb_name(&dgram->source_name,srcname,src_type);
make_nmb_name(&dgram->dest_name,dstname,dest_type);
ptr = &dgram->data[0];
/* Setup the smb part. */
ptr -= 4; /* XXX Ugliness because of handling of tcp SMB length. */
memcpy(tmp,ptr,4);
set_message(ptr,17,17 + len,True);
memcpy(ptr,tmp,4);
SCVAL(ptr,smb_com,SMBtrans);
SSVAL(ptr,smb_vwv1,len);
SSVAL(ptr,smb_vwv11,len);
SSVAL(ptr,smb_vwv12,70 + strlen(mailslot));
SSVAL(ptr,smb_vwv13,3);
SSVAL(ptr,smb_vwv14,1);
SSVAL(ptr,smb_vwv15,1);
SSVAL(ptr,smb_vwv16,2);
p2 = smb_buf(ptr);
pstrcpy(p2,mailslot);
p2 = skip_string(p2,1);
memcpy(p2,buf,len);
p2 += len;
dgram->datasize = PTR_DIFF(p2,ptr+4); /* +4 for tcp length. */
p.ip = dest_ip;
p.port = dest_port;
p.fd = dgram_sock;
p.timestamp = time(NULL);
p.packet_type = DGRAM_PACKET;
DEBUG(4,("send_mailslot: Sending to mailslot %s from %s IP %s ", mailslot,
nmb_namestr(&dgram->source_name), inet_ntoa(src_ip)));
DEBUG(4,("to %s IP %s\n", nmb_namestr(&dgram->dest_name), inet_ntoa(dest_ip)));
return send_packet(&p);
}
/*
* cli_get_response: Get a response ...
*/
int cli_get_response(int dgram_sock, BOOL unique, char *mailslot, char *buf, int bufsiz)
{
struct packet_struct *packet;
packet = receive_dgram_packet(dgram_sock, 5, mailslot);
if (packet) { /* We got one, pull what we want out of the SMB data ... */
struct dgram_packet *dgram = &packet->packet.dgram;
/*
* We should probably parse the SMB, but for now, we will pull what
* from fixed, known locations ...
*/
/* Copy the data to buffer, respecting sizes ... */
memset(buf, &dgram->data[92], MIN(bufsiz, (dgram->datasize - 92)));
}
else
return -1;
return 0;
}
/*
* cli_get_backup_list: Send a get backup list request ...
*/
static char cli_backup_list[1024];
int cli_get_backup_list(const char *myname, const char *send_to_name)
{
char outbuf[15];
char *p;
struct in_addr sendto_ip, my_ip;
int dgram_sock;
struct sockaddr_in sock_out;
socklen_t name_size;
if (!resolve_name(send_to_name, &sendto_ip, 0x1d)) {
DEBUG(0, ("Could not resolve name: %s<1D>\n", send_to_name));
return False;
}
my_ip.s_addr = inet_addr("0.0.0.0");
if (!resolve_name(myname, &my_ip, 0x00)) { /* FIXME: Call others here */
DEBUG(0, ("Could not resolve name: %s<00>\n", myname));
}
if ((dgram_sock = open_socket_out(SOCK_DGRAM, &sendto_ip, 138, LONG_CONNECT_TIMEOUT)) < 0) {
DEBUG(4, ("open_sock_out failed ..."));
return False;
}
/* Make it a broadcast socket ... */
set_socket_options(dgram_sock, "SO_BROADCAST");
/* Make it non-blocking??? */
if (fcntl(dgram_sock, F_SETFL, O_NONBLOCK) < 0) {
DEBUG(0, ("Unable to set non blocking on dgram sock\n"));
}
/* Now, bind a local addr to it ... Try port 138 first ... */
memset((char *)&sock_out, '\0', sizeof(sock_out));
sock_out.sin_addr.s_addr = INADDR_ANY;
sock_out.sin_port = htons(138);
sock_out.sin_family = AF_INET;
if (bind(dgram_sock, (struct sockaddr *)&sock_out, sizeof(sock_out)) < 0) {
/* Try again on any port ... */
sock_out.sin_port = INADDR_ANY;
if (bind(dgram_sock, (struct sockaddr *)&sock_out, sizeof(sock_out)) < 0) {
DEBUG(4, ("failed to bind socket to address ...\n"));
return False;
}
}
/* Now, figure out what socket name we were bound to. We want the port */
name_size = sizeof(sock_out);
getsockname(dgram_sock, (struct sockaddr *)&sock_out, &name_size);
DEBUG(5, ("Socket bound to IP:%s, port: %d\n", inet_ntoa(sock_out.sin_addr), ntohs(sock_out.sin_port)));
/* Now, build the request */
memset(cli_backup_list, '\0', sizeof(cli_backup_list));
memset(outbuf, '\0', sizeof(outbuf));
p = outbuf;
SCVAL(p, 0, ANN_GetBackupListReq);
p++;
SCVAL(p, 0, 1); /* Count pointer ... */
p++;
SIVAL(p, 0, 1); /* The sender's token ... */
p += 4;
cli_send_mailslot(dgram_sock, True, "\\MAILSLOT\\BROWSE", outbuf,
PTR_DIFF(p, outbuf), myname, 0, send_to_name,
0x1d, sendto_ip, my_ip, 138, sock_out.sin_port);
/* We should check the error and return if we got one */
/* Now, get the response ... */
cli_get_response(dgram_sock, True, "\\MAILSLOT\\BROWSE", cli_backup_list, sizeof(cli_backup_list));
/* Should check the response here ... FIXME */
close(dgram_sock);
return True;
}
/*
* cli_get_backup_server: Get the backup list and retrieve a server from it
*/
int cli_get_backup_server(char *my_name, char *target, char *servername, int namesize)
{
/* Get the backup list first. We could pull this from the cache later */
cli_get_backup_list(my_name, target); /* FIXME: Check the response */
if (!cli_backup_list[0]) { /* Empty list ... try again */
cli_get_backup_list(my_name, target);
}
strncpy(servername, cli_backup_list, MIN(16, namesize));
return True;
}
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