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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 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"
/*
* cli_send_mailslot, send a mailslot for client code ...
*/
bool cli_send_mailslot(struct messaging_context *msg_ctx,
bool unique, const char *mailslot,
uint16 priority,
char *buf, int len,
const char *srcname, int src_type,
const char *dstname, int dest_type,
struct in_addr dest_ip)
{
struct packet_struct p;
struct dgram_packet *dgram = &p.packet.dgram;
char *ptr, *p2;
char tmp[4];
pid_t nmbd_pid;
if ((nmbd_pid = pidfile_pid("nmbd")) == 0) {
DEBUG(3, ("No nmbd found\n"));
return False;
}
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);
/* source ip is filled by nmbd */
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,strlen(mailslot) + 1 + 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,priority);
SSVAL(ptr,smb_vwv16,2);
p2 = smb_buf(ptr);
fstrcpy(p2,mailslot);
p2 = skip_string(ptr,MAX_DGRAM_SIZE,p2);
if (!p2) {
return False;
}
memcpy(p2,buf,len);
p2 += len;
dgram->datasize = PTR_DIFF(p2,ptr+4); /* +4 for tcp length. */
p.packet_type = DGRAM_PACKET;
p.ip = dest_ip;
p.timestamp = time(NULL);
DEBUG(4,("send_mailslot: Sending to mailslot %s from %s ",
mailslot, nmb_namestr(&dgram->source_name)));
DEBUGADD(4,("to %s IP %s\n", nmb_namestr(&dgram->dest_name),
inet_ntoa(dest_ip)));
return NT_STATUS_IS_OK(messaging_send_buf(msg_ctx,
pid_to_procid(nmbd_pid),
MSG_SEND_PACKET,
(uint8 *)&p, sizeof(p)));
}
/*
* cli_get_response: Get a response ...
*/
bool cli_get_response(const char *mailslot, char *buf, int bufsiz)
{
struct packet_struct *p;
p = receive_unexpected(DGRAM_PACKET, 0, mailslot);
if (p == NULL)
return False;
memcpy(buf, &p->packet.dgram.data[92],
MIN(bufsiz, p->packet.dgram.datasize-92));
return True;
}
/*
* cli_get_backup_list: Send a get backup list request ...
*/
static char cli_backup_list[1024];
int cli_get_backup_list(struct messaging_context *msg_ctx,
const char *myname, const char *send_to_name)
{
pstring outbuf;
char *p;
struct in_addr sendto_ip;
if (!resolve_name(send_to_name, &sendto_ip, 0x1d)) {
DEBUG(0, ("Could not resolve name: %s<1D>\n", send_to_name));
return False;
}
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(msg_ctx, True, "\\MAILSLOT\\BROWSE", 1, outbuf,
PTR_DIFF(p, outbuf), myname, 0, send_to_name,
0x1d, sendto_ip);
/* We should check the error and return if we got one */
/* Now, get the response ... */
cli_get_response("\\MAILSLOT\\BROWSE",
cli_backup_list, sizeof(cli_backup_list));
return True;
}
/*
* cli_get_backup_server: Get the backup list and retrieve a server from it
*/
int cli_get_backup_server(struct messaging_context *msg_ctx,
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(msg_ctx, my_name, target); /* FIXME: Check the response */
if (!cli_backup_list[0]) { /* Empty list ... try again */
cli_get_backup_list(msg_ctx, my_name, target);
}
strncpy(servername, cli_backup_list, MIN(16, namesize));
return True;
}
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