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/*
Unix SMB/CIFS implementation.
SMB client socket context management functions
Copyright (C) Andrew Tridgell 1994-2003
Copyright (C) James Myers 2003 <myersjj@samba.org>
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"
/*
create a cli_socket context
*/
struct cli_socket *cli_sock_init(void)
{
struct cli_socket *sock;
TALLOC_CTX *mem_ctx;
mem_ctx = talloc_init("cli_socket");
if (!mem_ctx) return NULL;
sock = talloc_zero(mem_ctx, sizeof(*sock));
if (!sock) {
talloc_destroy(mem_ctx);
return NULL;
}
sock->mem_ctx = mem_ctx;
sock->fd = -1;
sock->port = 0;
/* 20 second default timeout */
sock->timeout = 20000;
sock->hostname = NULL;
return sock;
}
/*
connect a cli_socket context to an IP/port pair
if port is 0 then choose 445 then 139
*/
BOOL cli_sock_connect(struct cli_socket *sock, struct in_addr *ip, int port)
{
if (getenv("LIBSMB_PROG")) {
sock->fd = sock_exec(getenv("LIBSMB_PROG"));
return sock->fd != -1;
}
if (port == 0) {
return cli_sock_connect(sock, ip, 445) ||
cli_sock_connect(sock, ip, 139);
}
sock->dest_ip = *ip;
sock->port = port;
sock->fd = open_socket_out(SOCK_STREAM,
&sock->dest_ip,
sock->port,
LONG_CONNECT_TIMEOUT);
if (sock->fd == -1) {
return False;
}
set_blocking(sock->fd, False);
return True;
}
/****************************************************************************
mark the socket as dead
****************************************************************************/
void cli_sock_dead(struct cli_socket *sock)
{
if (sock->fd != -1) {
close(sock->fd);
sock->fd = -1;
}
}
/****************************************************************************
reduce socket reference count - if it becomes zero then close
****************************************************************************/
void cli_sock_close(struct cli_socket *sock)
{
sock->reference_count--;
if (sock->reference_count <= 0) {
cli_sock_dead(sock);
}
}
/****************************************************************************
Set socket options on a open connection.
****************************************************************************/
void cli_sock_set_options(struct cli_socket *sock, const char *options)
{
set_socket_options(sock->fd, options);
}
/****************************************************************************
Write to socket. Return amount written.
****************************************************************************/
ssize_t cli_sock_write(struct cli_socket *sock, const char *data, size_t len)
{
if (sock->fd == -1) {
errno = EIO;
return -1;
}
return write_data(sock->fd, data, len);
}
/****************************************************************************
Read from socket. return amount read
****************************************************************************/
ssize_t cli_sock_read(struct cli_socket *sock, char *data, size_t len)
{
if (sock->fd == -1) {
errno = EIO;
return -1;
}
return read_data(sock->fd, data, len);
}
/****************************************************************************
resolve a hostname and connect
****************************************************************************/
BOOL cli_sock_connect_byname(struct cli_socket *sock, const char *host, int port)
{
int name_type = 0x20;
struct in_addr ip;
TALLOC_CTX *mem_ctx;
char *name, *p;
BOOL ret;
if (getenv("LIBSMB_PROG")) {
sock->fd = sock_exec(getenv("LIBSMB_PROG"));
return sock->fd != -1;
}
mem_ctx = talloc_init("cli_sock_connect_byname");
if (!mem_ctx) return False;
name = talloc_strdup(mem_ctx, host);
/* allow hostnames of the form NAME#xx and do a netbios lookup */
if ((p = strchr(name, '#'))) {
name_type = strtol(p+1, NULL, 16);
*p = 0;
}
if (!resolve_name(mem_ctx, name, &ip, name_type)) {
talloc_destroy(mem_ctx);
return False;
}
ret = cli_sock_connect(sock, &ip, port);
if (ret) {
sock->hostname = talloc_steal(mem_ctx, sock->mem_ctx, name);
}
talloc_destroy(mem_ctx);
return ret;
}
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