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/*
Unix SMB/Netbios implementation.
Version 2
SMB agent/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"
extern int DEBUGLEVEL;
static char packet[BUFFER_SIZE];
/****************************************************************************
terminate sockent connection
****************************************************************************/
static void free_sock(void *sock)
{
if (sock != NULL)
{
struct msrpc_state *n = (struct msrpc_state*)sock;
msrpc_use_del(n->pipe_name, &n->usr, False, NULL);
}
}
static struct msrpc_state *init_client_connection(int c)
{
pstring buf;
fstring pipe_name;
struct user_creds usr;
int rl;
uint32 len;
BOOL new_con = False;
struct msrpc_state *n = NULL;
CREDS_CMD cmd;
prs_struct ps;
ZERO_STRUCT(usr);
ZERO_STRUCT(cmd);
cmd.cred = &usr;
DEBUG(10,("init_client_connection: first request\n"));
rl = read(c, &buf, sizeof(len));
if (rl != sizeof(len))
{
DEBUG(0,("Unable to read length\n"));
dump_data(0, buf, sizeof(len));
return NULL;
}
len = IVAL(buf, 0);
if (len > sizeof(buf))
{
DEBUG(0,("length %d too long\n", len));
return NULL;
}
rl = read(c, buf, len);
if (rl < 0)
{
DEBUG(0,("Unable to read from connection\n"));
return NULL;
}
#ifdef DEBUG_PASSWORD
dump_data(100, buf, rl);
#endif
/* make a static data parsing structure from the api_fd_reply data */
prs_init(&ps, 0, 4, 0, True);
mem_create(ps.data, buf, 0, len, 0, False);
if (!creds_io_cmd("creds", &cmd, &ps, 0))
{
DEBUG(0,("Unable to parse credentials\n"));
mem_free_data(ps.data);
return NULL;
}
mem_free_data(ps.data);
if (ps.offset != rl)
{
DEBUG(0,("Buffer size %d %d!\n", ps.offset, rl));
return NULL;
}
switch (cmd.command)
{
case AGENT_CMD_CON:
case AGENT_CMD_CON_ANON:
{
new_con = True;
break;
}
case AGENT_CMD_CON_REUSE:
{
new_con = True;
break;
}
default:
{
DEBUG(0,("unknown command %d\n", cmd.command));
return NULL;
}
}
if (new_con)
{
uint32 status = 0;
n = msrpc_use_add(pipe_name, &usr, False);
if (n == NULL)
{
DEBUG(0,("Unable to connect to %s\n", pipe_name));
status = 0x1;
}
else
{
fstrcpy(n->pipe_name, pipe_name);
copy_user_creds(&n->usr, &usr);
}
if (write(c, &status, sizeof(status)) != sizeof(status))
{
DEBUG(0,("Could not write connection down pipe.\n"));
if (n != NULL)
{
msrpc_use_del(pipe_name, &usr, False, NULL);
n = NULL;
}
}
}
free_user_creds(&usr);
return n;
}
static BOOL process_cli_sock(struct sock_redir **socks, uint32 num_socks,
struct sock_redir *sock)
{
struct msrpc_state *n = (struct msrpc_state*)sock->n;
if (n == NULL)
{
n = init_client_connection(sock->c);
if (n == NULL)
{
return False;
}
sock->n = (void*)n;
sock->s = n->fd;
}
else
{
if (!receive_smb(sock->c, packet, 0))
{
DEBUG(0,("client closed connection\n"));
return False;
}
if (!send_smb(sock->s, packet))
{
DEBUG(0,("server is dead\n"));
return False;
}
}
return True;
}
static BOOL process_srv_sock(struct sock_redir **socks, uint32 num_socks,
int fd)
{
int i;
if (!receive_smb(fd, packet, 0))
{
DEBUG(0,("server closed connection\n"));
return False;
}
DEBUG(10,("process_srv_sock:\tfd:\t%d\n", fd));
for (i = 0; i < num_socks; i++)
{
struct msrpc_state *n;
if (socks[i] == NULL || socks[i]->n == NULL)
{
continue;
}
n = (struct msrpc_state*)socks[i]->n;
DEBUG(10,("list:\tfd:\t%d\n",
socks[i]->s));
if (!send_smb(socks[i]->c, packet))
{
DEBUG(0,("client is dead\n"));
return False;
}
return True;
}
return False;
}
static int get_agent_sock(char *pipe_name)
{
fstring path;
fstring dir;
slprintf(dir, sizeof(dir)-1, "/tmp/.msrpc/.%s", pipe_name);
slprintf(path, sizeof(path)-1, "%s/agent", dir);
return create_pipe_socket(dir, S_IRUSR|S_IWUSR|S_IXUSR, path, 0);
}
void start_msrpc_agent(char *pipe_name)
{
struct vagent_ops va =
{
free_sock,
get_agent_sock,
process_cli_sock,
process_srv_sock,
pipe_name,
NULL,
0
};
if (fork() == 0)
{
/* child */
start_agent(&va);
}
}
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