ncpfs/lib/ncplib.c

/*
 *  ncplib.c
 *
 *  Copyright (C) 1995, 1996 by Volker Lendecke
 *
 */

#include "ncplib.h"
#include "ncplib_err.h"

#include <sys/ioctl.h>
extern pid_t wait(int *);
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <signal.h>
#include <fcntl.h>
#include <ctype.h>
#include <linux/route.h>
#include <sys/param.h>
#include <stdlib.h>
#include <mntent.h>
#include <pwd.h>
#include <sys/stat.h>
#include <stdarg.h>

static long
 ncp_negotiate_buffersize(struct ncp_conn *conn,
			  int size, int *target);
static long
 ncp_login_object(struct ncp_conn *conn,
		  const unsigned char *username,
		  int login_type,
		  const unsigned char *password);

static long
 ncp_do_close(struct ncp_conn *conn);

void
str_upper(char *name)
{
	while (*name)
	{
		*name = toupper(*name);
		name = name + 1;
	}
}

#if 0

static int debug_level = 5;
static FILE *logfile = stderr;

static void
dprintf(int level, char *p,...)
{
	va_list ap;

	if (level > debug_level)
	{
		return;
	}
	va_start(ap, p);
	vfprintf(logfile, p, ap);
	va_end(ap);
	fprintf(logfile, "\n");
	fflush(logfile);
}

#endif

/* I know it's terrible to include a .c file here, but I want to keep
   the file nwcrypt.c intact and separate for copyright reasons */
#include "nwcrypt.c"

void
ipx_fprint_node(FILE * file, IPXNode node)
{
	fprintf(file, "%02X%02X%02X%02X%02X%02X",
		(unsigned char) node[0],
		(unsigned char) node[1],
		(unsigned char) node[2],
		(unsigned char) node[3],
		(unsigned char) node[4],
		(unsigned char) node[5]
	    );
}

void
ipx_fprint_network(FILE * file, IPXNet net)
{
	fprintf(file, "%08lX", ntohl(net));
}

void
ipx_fprint_port(FILE * file, IPXPort port)
{
	fprintf(file, "%04X", ntohs(port));
}

void
ipx_fprint_saddr(FILE * file, struct sockaddr_ipx *sipx)
{
	ipx_fprint_network(file, sipx->sipx_network);
	fprintf(file, ":");
	ipx_fprint_node(file, sipx->sipx_node);
	fprintf(file, ":");
	ipx_fprint_port(file, sipx->sipx_port);
}

void
ipx_print_node(IPXNode node)
{
	ipx_fprint_node(stdout, node);
}

void
ipx_print_network(IPXNet net)
{
	ipx_fprint_network(stdout, net);
}

void
ipx_print_port(IPXPort port)
{
	ipx_fprint_port(stdout, port);
}

void
ipx_print_saddr(struct sockaddr_ipx *sipx)
{
	ipx_fprint_saddr(stdout, sipx);
}

int
ipx_sscanf_node(char *buf, unsigned char node[6])
{
	int i;
	int n[6];

	if ((i = sscanf(buf, "%2x%2x%2x%2x%2x%2x",
			&(n[0]), &(n[1]), &(n[2]),
			&(n[3]), &(n[4]), &(n[5]))) != 6)
	{
		return i;
	}
	for (i = 0; i < 6; i++)
	{
		node[i] = n[i];
	}
	return 6;
}

static int
ipx_sscanf_saddr(char *buf, struct sockaddr_ipx *target)
{
	char *p;
	struct sockaddr_ipx addr;

	addr.sipx_family = AF_IPX;
	addr.sipx_type = NCP_PTYPE;

	if (sscanf(buf, "%lx", &addr.sipx_network) != 1)
	{
		return 1;
	}
	addr.sipx_network = htonl(addr.sipx_network);
	if ((p = strchr(buf, ':')) == NULL)
	{
		return 1;
	}
	p += 1;
	if (ipx_sscanf_node(p, addr.sipx_node) != 6)
	{
		return 1;
	}
	if ((p = strchr(p, ':')) == NULL)
	{
		return 1;
	}
	p += 1;
	if (sscanf(p, "%hx", &addr.sipx_port) != 1)
	{
		return 1;
	}
	addr.sipx_port = htons(addr.sipx_port);
	*target = addr;
	return 0;
}

void
ipx_assign_node(IPXNode dest, IPXNode src)
{
	memcpy(dest, src, IPX_NODE_LEN);
}

int
ipx_node_equal(IPXNode n1, IPXNode n2)
{
	return memcmp(n1, n2, IPX_NODE_LEN) == 0;
}

static int
ipx_recvfrom(int sock, void *buf, int len, unsigned int flags,
	     struct sockaddr_ipx *sender, int *addrlen, int timeout,
	     long *err)
{
	fd_set rd, wr, ex;
	struct timeval tv;
	int result;

	FD_ZERO(&rd);
	FD_ZERO(&wr);
	FD_ZERO(&ex);
	FD_SET(sock, &rd);

	tv.tv_sec = timeout;
	tv.tv_usec = 0;

	if ((result = select(sock + 1, &rd, &wr, &ex, &tv)) == -1)
	{
		*err = errno;
		return -1;
	}
	if (FD_ISSET(sock, &rd))
	{
		result = recvfrom(sock, buf, len, flags,
				  (struct sockaddr *) sender, addrlen);
	} else
	{
		result = -1;
		errno = ETIMEDOUT;
	}
	if (result < 0)
	{
		*err = errno;
	}
	return result;
}

static int
ipx_recv(int sock, void *buf, int len, unsigned int flags, int timeout,
	 long *err)
{
	struct sockaddr_ipx sender;
	int addrlen = sizeof(sender);

	return ipx_recvfrom(sock, buf, len, flags, &sender, &addrlen,
			    timeout, err);
}

static int
install_wdog(struct ncp_conn *conn)
{
	int parent_pid = getpid();
	int pid;
	int sock = conn->wdog_sock;

	char buf[1024];
	struct sockaddr_ipx sender;
	int sizeofaddr = sizeof(struct sockaddr_ipx);
	int pktsize;


	if ((pid = fork()) < 0)
	{
		return -1;
	}
	if (pid != 0)
	{
		/* Parent, should go on as usual */
		conn->wdog_pid = pid;
		return 0;
	}
	while (1)
	{
		long err;
		/* every 120 seconds we look if our parent is
		   still alive */
		pktsize = ipx_recvfrom(sock, buf, sizeof(buf), 0,
				       &sender, &sizeofaddr, 120, &err);

		if (getppid() != parent_pid)
		{
			/* our parent has died, so nothing to do
			   anymore */
			exit(0);
		}
		if ((pktsize != 2)
		    || (buf[1] != '?'))
		{
			continue;
		}
		buf[1] = 'Y';
		pktsize = sendto(sock, buf, 2, 0,
				 (struct sockaddr *) &sender,
				 sizeof(sender));
	}
}

#define ncp_printf printf

static void
 assert_conn_locked(struct ncp_conn *conn);

static void
assert_conn_not_locked(struct ncp_conn *conn)
{
	if (conn->lock != 0)
	{
		ncp_printf("ncpfs: conn already locked!\n");
	}
}

static void
ncp_lock_conn(struct ncp_conn *conn)
{
	assert_conn_not_locked(conn);
	conn->lock = 1;
}

static void
ncp_unlock_conn(struct ncp_conn *conn)
{
	assert_conn_locked(conn);
	conn->lock = 0;
}

static long
do_ncp_call(struct ncp_conn *conn, int request_size)
{
	struct ncp_request_header request;

	int result;
	int retries = 20;
	int len;
	long err;

	memcpy(&request, conn->packet, sizeof(request));

	while (retries > 0)
	{
		struct ncp_reply_header reply;
		struct sockaddr_ipx sender;
		int sizeofaddr = sizeof(sender);

		retries -= 1;

		result = sendto(conn->ncp_sock, conn->packet,
				request_size,
				0, (struct sockaddr *) &(conn->i.addr),
				sizeof(conn->i.addr));

		if (result < 0)
		{
			return errno;
		}
	      re_select:
		len = ipx_recvfrom(conn->ncp_sock,
				   (char *) &reply, sizeof(reply),
				   MSG_PEEK, &sender, &sizeofaddr, 3, &err);

		if ((len < 0) && (err == ETIMEDOUT))
		{
			continue;
		}
		if (len < 0)
		{
			return err;
		}
		if (		/* Is the sender wrong? */
			   (memcmp(&sender.sipx_node,
				   &(conn->i.addr.sipx_node), 6) != 0)
			   || (sender.sipx_port != conn->i.addr.sipx_port)

		/* Did the sender send a positive acknowledge? */
			   || ((len == sizeof(reply))
			       && (reply.type == NCP_POSITIVE_ACK))

		/* Did we get a bogus answer? */
			   || ((len < sizeof(reply))
			       || (reply.type != NCP_REPLY)
			       || ((request.type != NCP_ALLOC_SLOT_REQUEST)
				   && ((reply.sequence != request.sequence)
				       || (reply.conn_low != request.conn_low)
				 || (reply.conn_high != request.conn_high)))))
		{
			/* Then throw away the packet */
			ipx_recv(conn->ncp_sock, (char *) &reply, sizeof(reply),
				 0, 1, &err);
			goto re_select;
		}
		ipx_recv(conn->ncp_sock, conn->packet, NCP_PACKET_SIZE,
			 0, 1, &err);
		conn->reply_size = len;
		return 0;
	}
	return ETIMEDOUT;
}

static int
ncp_mount_request(struct ncp_conn *conn, int function)
{
	struct ncp_ioctl_request request;
	int result;

	assert_conn_locked(conn);

	if (conn->has_subfunction != 0)
	{
		WSET_HL(conn->packet, 7, conn->current_size
			- sizeof(struct ncp_request_header) - 2);
	}
	request.function = function;
	request.size = conn->current_size;
	request.data = conn->packet;

	if ((result = ioctl(conn->mount_fid, NCP_IOC_NCPREQUEST, &request)) < 0)
	{
		return result;
	}
	conn->completion = BVAL(conn->packet, 6);
	conn->conn_status = BVAL(conn->packet, 7);
	conn->ncp_reply_size = result - sizeof(struct ncp_reply_header);

	if ((conn->completion != 0) && (conn->verbose != 0))
	{
		ncp_printf("ncp_request_error: %d\n", conn->completion);
	}
	return conn->completion == 0 ? 0 : NCPL_ET_REQUEST_ERROR;
}

static long
ncp_temp_request(struct ncp_conn *conn, int function)
{
	long err;

	assert_conn_locked(conn);

	conn->sequence += 1;

	WSET_LH(conn->packet, 0, NCP_REQUEST);
	BSET(conn->packet, 2, conn->sequence);
	BSET(conn->packet, 3, (conn->i.connection) & 0xff);
	BSET(conn->packet, 5, (conn->i.connection) >> 8);
	BSET(conn->packet, 4, 1);
	BSET(conn->packet, 6, function);

	if (conn->has_subfunction != 0)
	{
		WSET_HL(conn->packet, 7, conn->current_size
			- sizeof(struct ncp_request_header) - 2);
	}
	if ((err = do_ncp_call(conn, conn->current_size)) != 0)
	{
		return err;
	}
	conn->completion = BVAL(conn->packet, 6);
	conn->conn_status = BVAL(conn->packet, 7);
	conn->ncp_reply_size =
	    conn->reply_size - sizeof(struct ncp_reply_header);

	if ((conn->completion != 0) && (conn->verbose != 0))
	{
		ncp_printf("ncp_completion_code: %d\n", conn->completion);
	}
	return conn->completion == 0 ? 0 : NCPL_ET_REQUEST_ERROR;
}

#ifdef PACKET_SIGNATURES
static long
ncp_setup_security(struct ncp_conn *conn)
{
	__u8 security;
	__u8 accepted_security;
	__u16 socket, size;

	conn->want_signatures = 0;
	if (ncp_get_big_ncp_max_packet_size(conn, 576, 0, &size, &socket,
					    &accepted_security) != 0)
	{
		return 0;
	}
	if ((accepted_security & NCP_SEC_SIGNATURE_REQUESTED) == 0)
	{
		return 0;
	}
	security = NCP_SEC_SIGNATURE_REQUESTED;
	if (ncp_get_big_ncp_max_packet_size(conn, 576, security,
					    &size, &socket,
					    &accepted_security) != 0)
	{
		return 0;
	}
	if ((accepted_security & NCP_SEC_SIGNATURE_REQUESTED) != 0)
	{
		conn->want_signatures = 1;
	}
	return 0;
}
#endif

static long
ncp_connect_addr(struct ncp_conn *conn, const struct sockaddr_ipx *target,
		 int wdog_needed)
{
	struct sockaddr_ipx addr;
	int addrlen;

	int ncp_sock, wdog_sock;
	long err;

	conn->is_connected = NOT_CONNECTED;
	conn->verbose = 0;

	if ((ncp_sock = socket(AF_IPX, SOCK_DGRAM, PF_IPX)) == -1)
	{
		return errno;
	}
	if ((wdog_sock = socket(AF_IPX, SOCK_DGRAM, PF_IPX)) == -1)
	{
		return errno;
	}
	addr.sipx_family = AF_IPX;
	addr.sipx_port = htons(0x0);
	addr.sipx_type = NCP_PTYPE;
	addr.sipx_network = IPX_THIS_NET;
	ipx_assign_node(addr.sipx_node, IPX_THIS_NODE);

	addrlen = sizeof(addr);

	if ((bind(ncp_sock, (struct sockaddr *) &addr, sizeof(addr)) == -1)
	|| (getsockname(ncp_sock, (struct sockaddr *) &addr, &addrlen) == -1))
	{
		int saved_errno = errno;
		close(ncp_sock);
		close(wdog_sock);
		return saved_errno;
	}
	addr.sipx_port = htons(ntohs(addr.sipx_port) + 1);

	if (bind(wdog_sock, (struct sockaddr *) &addr, sizeof(addr)) == -1)
	{
		int saved_errno = errno;
		close(ncp_sock);
		close(wdog_sock);
		return saved_errno;
	}
	conn->ncp_sock = ncp_sock;
	conn->wdog_sock = wdog_sock;

	conn->sequence = 0;
	conn->i.addr = *target;

	WSET_LH(conn->packet, 0, NCP_ALLOC_SLOT_REQUEST);
	BSET(conn->packet, 2, conn->sequence);
	BSET(conn->packet, 3, 0xff);
	BSET(conn->packet, 4, 1);
	BSET(conn->packet, 5, 0xff);
	BSET(conn->packet, 6, 0);

	if ((err = do_ncp_call(conn, sizeof(struct ncp_request_header))) != 0)
	{
		close(ncp_sock);
		close(wdog_sock);
		return err;
	}
	if (wdog_needed != 0)
	{
		install_wdog(conn);
	} else
	{
		conn->wdog_pid = 0;
	}

	conn->sequence = 0;
	conn->i.connection =
	    BVAL(conn->packet, 3) + (BVAL(conn->packet, 5) << 8);
	conn->is_connected = CONN_TEMPORARY;

	if ((ncp_negotiate_buffersize(conn, 1024,
				      &(conn->i.buffer_size)) != 0)
	    || (conn->i.buffer_size < 512)
	    || (conn->i.buffer_size > 1024))
	{
		ncp_do_close(conn);
		return -1;
	}
	return 0;
}

static long
ncp_connect_any(struct ncp_conn *conn, int wdog_needed)
{
	struct sockaddr_ipx *addr;
	long result;
	const char *server = NULL;
	long err;

	if ((addr = ncp_find_server(&server, NCP_BINDERY_FSERVER, &err)) == NULL)
	{
		return err;
	}
	if ((result = ncp_connect_addr(conn, addr, wdog_needed)) != 0)
	{
		return result;
	}
	strcpy(conn->server, server);
	return 0;
}

struct sockaddr_ipx *
ncp_find_fileserver(const char *server_name, long *err)
{
	return ncp_find_server(&server_name, NCP_BINDERY_FSERVER, err);
}

struct sockaddr_ipx *
ncp_find_server(const char **server_name, int type, long *err)
{
	char command[256];
	char buf[128];
	char server[NCP_BINDERY_NAME_LEN + 1];
	static struct sockaddr_ipx result;
	FILE *p;
	int res;
	char *n;

	memset(server, 0, sizeof(server));

	if (*server_name != NULL)
	{
		strncpy(server, *server_name, sizeof(server) - 1);
		str_upper(server);
	}
	sprintf(command, "nwsfind -t %d %s", type, server);
	p = popen(command, "r");

	if (p == NULL)
	{
		*err = errno;
		return NULL;
	}
	fgets(buf, sizeof(buf), p);

	if (buf[strlen(buf)] - 1 == '\n');
	{
		buf[strlen(buf)] = '\0';
	}

	if (((res = pclose(p)) != 0) || (ipx_sscanf_saddr(buf, &result) != 0))
	{
		*err = (*server_name != NULL)
		    ? NCPL_ET_HOST_UNKNOWN : NCPL_ET_NO_SERVER;
		return NULL;
	}
	if (*server_name == NULL)
	{
		if ((n = strchr(buf, ' ')) == NULL)
		{
			*err = NCPL_ET_HOST_UNKNOWN;
			return NULL;
		}
		*server_name = n;
	}
	return &result;
}

static long
ncp_open_temporary(struct ncp_conn *conn,
		   const struct ncp_conn_spec *spec)
{
	struct sockaddr_ipx *addr;
	long err;

	if (spec == NULL)
	{
		return ncp_connect_any(conn, 1);
	}
	if ((addr = ncp_find_fileserver(spec->server, &err)) == NULL)
	{
		return err;
	}
	if ((err = ncp_connect_addr(conn, addr, 1)) != 0)
	{
		return err;
	}
	strcpy(conn->server, spec->server);

	if (strlen(spec->user) != 0)
	{
		if (ncp_login_object(conn, spec->user, spec->login_type,
				     spec->password) != 0)
		{
			ncp_do_close(conn);
			return EACCES;
		}
		strcpy(conn->user, spec->user);
	}
	return 0;
}

char *
ncp_find_permanent(const struct ncp_conn_spec *spec)
{
	FILE *mtab;
	struct ncp_conn_ent *conn_ent;
	char *result = NULL;
	int mount_fid;
	struct ncp_fs_info i;

	initialize_NCPL_error_table();

	if ((mtab = fopen(MOUNTED, "r")) == NULL)
	{
		return NULL;
	}
	while ((conn_ent = ncp_get_conn_ent(mtab)) != NULL)
	{
		if (spec != NULL)
		{
			if ((conn_ent->uid != spec->uid)
			    || ((strlen(spec->server) != 0)
				&& (strcasecmp(conn_ent->server,
					       spec->server) != 0))
			    || ((strlen(spec->user) != 0)
				&& (strcasecmp(conn_ent->user,
					       spec->user) != 0)))
			{
				continue;
			}
		}
		mount_fid = open(conn_ent->mount_point, O_RDONLY, 0);
		if (mount_fid < 0)
		{
			continue;
		}
		i.version = NCP_GET_FS_INFO_VERSION;

		if (ioctl(mount_fid, NCP_IOC_GET_FS_INFO, &i) < 0)
		{
			close(mount_fid);
			continue;
		}
		close(mount_fid);
		result = conn_ent->mount_point;
		break;
	}

	fclose(mtab);
	errno = (result == NULL) ? ENOENT : 0;
	return result;
}

static int
ncp_open_permanent(struct ncp_conn *conn,
		   const struct ncp_conn_spec *spec)
{
	char *mount_point;

	if (conn->is_connected != NOT_CONNECTED)
	{
		errno = EBUSY;
		return -1;
	}
	if ((mount_point = ncp_find_permanent(spec)) == NULL)
	{
		return -1;
	}
	if (strlen(mount_point) >= sizeof(conn->mount_point))
	{
		errno = ENAMETOOLONG;
		return -1;
	}
	/* The rest has already been done in ncp_find_permanent, so we
	 * do not check errors anymore */
	conn->mount_fid = open(mount_point, O_RDONLY, 0);
	conn->i.version = NCP_GET_FS_INFO_VERSION;
	ioctl(conn->mount_fid, NCP_IOC_GET_FS_INFO, &(conn->i));
	if (spec != NULL)
	{
		strncpy(conn->server, spec->server, sizeof(conn->server));
		strncpy(conn->user, spec->user, sizeof(conn->user));
	} else
	{
		memset(conn->server, '\0', sizeof(conn->server));
		memset(conn->user, '\0', sizeof(conn->user));
	}
	strcpy(conn->mount_point, mount_point);
	conn->is_connected = CONN_PERMANENT;
	return 0;
}

struct ncp_conn *
ncp_open(const struct ncp_conn_spec *spec, long *err)
{
	struct ncp_conn *result;

	initialize_NCPL_error_table();

	result = malloc(sizeof(struct ncp_conn));

	if (result == NULL)
	{
		*err = ENOMEM;
		return NULL;
	}
	memzero(*result);

	if (ncp_open_permanent(result, spec) == 0)
	{
		return result;
	}
	if ((*err = ncp_open_temporary(result, spec)) != 0)
	{
		free(result);
		return NULL;
	}
	return result;
}


struct ncp_conn *
ncp_open_mount(const char *mount_point, long *err)
{
	struct ncp_conn *result;

	initialize_NCPL_error_table();

	if (strlen(mount_point) >= sizeof(result->mount_point))
	{
		*err = ENAMETOOLONG;
		return NULL;
	}
	result = malloc(sizeof(struct ncp_conn));

	if (result == NULL)
	{
		*err = ENOMEM;
		return NULL;
	}
	memzero(*result);

	result->is_connected = NOT_CONNECTED;

	result->mount_fid = open(mount_point, O_RDONLY, 0);
	if (result->mount_fid < 0)
	{
		free(result);
		*err = ENODEV;
		return NULL;
	}
	strcpy(result->mount_point, mount_point);
	result->is_connected = CONN_PERMANENT;

	result->i.version = NCP_GET_FS_INFO_VERSION;

	if (ioctl(result->mount_fid, NCP_IOC_GET_FS_INFO, &(result->i)) != 0)
	{
		free(result);
		*err = NCPL_ET_NO_NCPFS_FILE;
		return NULL;
	}
	return result;
}

static long
ncp_user_disconnect(struct ncp_conn *conn)
{
	long result;

	conn->sequence += 1;

	WSET_LH(conn->packet, 0, NCP_DEALLOC_SLOT_REQUEST);
	BSET(conn->packet, 2, conn->sequence);
	BSET(conn->packet, 3, (conn->i.connection) & 0xff);
	BSET(conn->packet, 4, 1);
	BSET(conn->packet, 5, (conn->i.connection) >> 8);
	BSET(conn->packet, 6, 0);

	if ((result = do_ncp_call(conn, sizeof(struct ncp_request_header))) != 0)
	{
		return result;
	}
	close(conn->ncp_sock);
	close(conn->wdog_sock);

	if (conn->wdog_pid != 0)
	{
		kill(conn->wdog_pid, SIGTERM);
		wait(NULL);
	}
	return 0;
}

static long
ncp_do_close(struct ncp_conn *conn)
{
	long result = -1;

	switch (conn->is_connected)
	{
	case CONN_PERMANENT:
		result = close(conn->mount_fid);
		break;

	case CONN_TEMPORARY:
		result = ncp_user_disconnect(conn);
		break;

	default:
		break;
	}

	conn->is_connected = NOT_CONNECTED;

	return result;
}

long
ncp_close(struct ncp_conn *conn)
{
	long result;
	if (conn == NULL)
	{
		return 0;
	}
	if ((result = ncp_do_close(conn)) != 0)
	{
		return result;
	}
	free(conn);
	return 0;
}

struct ncp_conn_ent *
ncp_get_conn_ent(FILE * filep)
{
	static struct ncp_conn_ent entry;
	char server[2 * NCP_BINDERY_NAME_LEN];
	char *user;
	struct mntent *mnt_ent;
	int fid;

	memzero(server);
	memzero(entry);

	while ((mnt_ent = getmntent(filep)) != NULL)
	{
		if (strcmp(mnt_ent->mnt_type, "ncpfs") != 0)
		{
			continue;
		}
		if (strlen(mnt_ent->mnt_fsname) >= sizeof(server))
		{
			continue;
		}
		strcpy(server, mnt_ent->mnt_fsname);
		user = strchr(server, '/');
		if (user != NULL)
		{
			*user = '\0';
			user += 1;
			if (strlen(user) >= sizeof(entry.user))
			{
				continue;
			}
			strcpy(entry.user, user);
		}
		if ((strlen(server) >= sizeof(entry.server))
		    || (strlen(mnt_ent->mnt_dir) >= sizeof(entry.mount_point)))
		{
			continue;
		}
		strcpy(entry.server, server);
		strcpy(entry.mount_point, mnt_ent->mnt_dir);

		fid = open(entry.mount_point, O_RDONLY, 0);

		if (fid == -1)
		{
			continue;
		}
		if (ioctl(fid, NCP_IOC_GETMOUNTUID, &entry.uid) != 0)
		{
			close(fid);
			continue;
		}
		close(fid);
		return &entry;
	}

	return NULL;
}

static struct ncp_conn_spec *
ncp_get_nwc_ent(FILE * nwc)
{
	static struct ncp_conn_spec spec;
	char line[512];
	int line_len;
	char *user;
	char *password;

	memzero(spec);
	spec.uid = getuid();

	while (fgets(line, sizeof(line), nwc) != NULL)
	{
		if ((line[0] == '\n')
		    || (line[0] == '#'))
		{
			continue;
		}
		line_len = strlen(line);
		if (line[line_len - 1] == '\n')
		{
			line[line_len - 1] = '\0';
		}
		user = strchr(line, '/');
		password = strchr(user != NULL ? user : line, ' ');

		if (password != NULL)
		{
			*password = '\0';
			password += 1;
		}
		if (user != NULL)
		{
			*user = '\0';
			user += 1;
			if (strlen(user) >= sizeof(spec.user))
			{
				continue;
			}
			strcpy(spec.user, user);
		}
		if (strlen(line) >= sizeof(spec.server))
		{
			continue;
		}
		strcpy(spec.server, line);

		if (password != NULL)
		{
			while (*password == ' ')
			{
				password += 1;
			}

			if (strlen(password) >= sizeof(spec.password))
			{
				continue;
			}
			strcpy(spec.password, password);
		}
		return &spec;
	}
	return NULL;
}

FILE *
ncp_fopen_nwc(const char *user, const char *mode, long *err)
{
	char path[MAXPATHLEN];
	char *home = NULL;
	struct stat st;

	if (mode == NULL)
	{
		mode = "r";
	}
	if (user == NULL)
	{
		home = getenv("HOME");
	} else
	{
		struct passwd *pwd;

		if ((pwd = getpwnam(user)) != NULL)
		{
			home = pwd->pw_dir;
		}
	}

	if ((home == NULL)
	    || (strlen(home) + sizeof(NWCLIENT) + 2 > sizeof(path)))
	{
		*err = ENAMETOOLONG;
		return NULL;
	}
	strcpy(path, home);
	strcat(path, "/");
	strcat(path, NWCLIENT);

	if (stat(path, &st) != 0)
	{
		*err = errno;
		return NULL;
	}
	if ((st.st_mode & (S_IRWXO | S_IRWXG)) != 0)
	{
		*err = NCPL_ET_INVALID_MODE;
		return NULL;
	}
	return fopen(path, mode);
}


struct ncp_conn_spec *
ncp_find_conn_spec(const char *server, const char *user, const char *password,
		   int login_necessary, uid_t uid, long *err)
{
	static struct ncp_conn_spec spec;

	struct ncp_conn conn;

	FILE *nwc;
	struct ncp_conn_spec *nwc_ent;

	initialize_NCPL_error_table();

	*err = 0;
	memzero(spec);
	spec.uid = getuid();

	if (server != NULL)
	{
		if (strlen(server) >= sizeof(spec.server))
		{
			*err = NCPL_ET_NAMETOOLONG;
			return NULL;
		}
		strcpy(spec.server, server);
	} else
	{
		if ((nwc = ncp_fopen_nwc(NULL, NULL, err)) == NULL)
		{
			*err = NCPL_ET_NO_SERVER;
			return NULL;
		}
		nwc_ent = ncp_get_nwc_ent(nwc);
		fclose(nwc);

		if (nwc_ent == NULL)
		{
			*err = NCPL_ET_NO_SPEC;
			return NULL;
		}
		strcpy(spec.server, nwc_ent->server);
		strcpy(spec.user, nwc_ent->user);
	}

	str_upper(spec.server);

	if (login_necessary == 0)
	{
		memset(spec.user, 0, sizeof(spec.user));
		memset(spec.password, 0, sizeof(spec.password));
		return &spec;
	}
	if (user != NULL)
	{
		if (strlen(user) >= sizeof(spec.user))
		{
			*err = NCPL_ET_NAMETOOLONG;
			return NULL;
		}
		strcpy(spec.user, user);
	}
	str_upper(spec.user);
	spec.login_type = NCP_BINDERY_USER;

	if (ncp_open_permanent(&conn, &spec) == 0)
	{
		ncp_do_close(&conn);
		return &spec;
	}
	if (password != NULL)
	{
		if (strlen(password) >= sizeof(spec.password))
		{
			*err = NCPL_ET_NAMETOOLONG;
			return NULL;
		}
		strcpy(spec.password, password);
	} else
	{
		if ((nwc = ncp_fopen_nwc(NULL, NULL, err)) != NULL)
		{
			while ((nwc_ent = ncp_get_nwc_ent(nwc)) != NULL)
			{
				if ((strcasecmp(spec.server,
						nwc_ent->server) != 0)
				    || ((*spec.user != '\0')
					&& (strcasecmp(spec.user,
						       nwc_ent->user) != 0)))
				{
					continue;
				}
				strcpy(spec.user, nwc_ent->user);
				strcpy(spec.password, nwc_ent->password);
				break;
			}
			fclose(nwc);
		}
	}

	if (strlen(spec.user) == 0)
	{
		*err = NCPL_ET_NO_USER;
		return NULL;
	}
	if ((strlen(spec.password) == 0) && (password == NULL))
	{
		char *password;
		if (!(isatty(0) && isatty(1)))
		{
			return NULL;
		}
		printf("Logging into %s as %s\n",
		       spec.server, spec.user);

		password = getpass("Password: ");
		if (strlen(password) > sizeof(spec.password))
		{
			return NULL;
		}
		strcpy(spec.password, password);
	} else
	{
		if (strcmp(spec.password, NWC_NOPASSWORD) == 0)
		{
			*spec.password = '\0';
		}
	}

	str_upper(spec.server);
	str_upper(spec.user);
	str_upper(spec.password);
	return &spec;
}

struct ncp_conn *
ncp_initialize_as(int *argc, char **argv,
		  int login_necessary, int login_type, long *err)
{
	char *server = NULL;
	char *user = NULL;
	char *password = NULL;
	struct ncp_conn_spec *spec;
	int i = 1;

	int get_argument(int arg_no, char **target)
	{
		int count = 1;

		if (target != NULL)
		{
			if (arg_no + 1 >= *argc)
			{
				/* No argument to switch */
				errno = EINVAL;
				return -1;
			}
			*target = argv[arg_no + 1];
			count = 2;
		}
		/* Delete the consumed switch from the argument list
		   and decrement the argument count */
		while (count + arg_no < *argc)
		{
			argv[arg_no] = argv[arg_no + count];
			arg_no += 1;
		}
		*argc -= count;
		return 0;
	}

	initialize_NCPL_error_table();

	*err = EINVAL;

	while (i < *argc)
	{
		if ((argv[i][0] != '-')
		    || (strlen(argv[i]) != 2))
		{
			i += 1;
			continue;
		}
		switch (argv[i][1])
		{
		case 'S':
			if (get_argument(i, &server) != 0)
			{
				return NULL;
			}
			continue;
		case 'U':
			if (get_argument(i, &user) != 0)
			{
				return NULL;
			}
			continue;
		case 'P':
			if (get_argument(i, &password) != 0)
			{
				return NULL;
			}
			continue;
		case 'n':
			if (get_argument(i, 0) != 0)
			{
				return NULL;
			}
			password = NWC_NOPASSWORD;
			continue;
		}
		i += 1;
	}

	spec = ncp_find_conn_spec(server, user, password, login_necessary,
				  getuid(), err);

	if (spec == NULL)
	{
		if (login_necessary != 0)
		{
			return NULL;
		} else
		{
			return ncp_open(NULL, err);
		}
	}
	spec->login_type = login_type;

	if (login_necessary == 0)
	{
		spec->user[0] = '\0';
	}
	return ncp_open(spec, err);
}

struct ncp_conn *
ncp_initialize(int *argc, char **argv,
	       int login_necessary, long *err)
{
	return ncp_initialize_as(argc, argv, login_necessary,
				 NCP_BINDERY_USER, err);
}

static long
ncp_request(struct ncp_conn *conn, int function)
{
	switch (conn->is_connected)
	{
	case CONN_PERMANENT:
		return ncp_mount_request(conn, function);
	case CONN_TEMPORARY:
		return ncp_temp_request(conn, function);
	default:
	}
	return ENOTCONN;
}

/****************************************************************************/
/*                                                                          */
/* Helper functions                                                         */
/*                                                                          */
/****************************************************************************/

static inline int
min(int a, int b)
{
	return (a < b) ? a : b;
}

struct nw_time_buffer
{
	__u8 year __attribute__((packed));
	__u8 month __attribute__((packed));
	__u8 day __attribute__((packed));
	__u8 hour __attribute__((packed));
	__u8 minute __attribute__((packed));
	__u8 second __attribute__((packed));
	__u8 wday __attribute__((packed));
};

static time_t
nw_to_ctime(struct nw_time_buffer *source)
{
	struct tm u_time;

	memzero(u_time);
	u_time.tm_sec = source->second;
	u_time.tm_min = source->minute;
	u_time.tm_hour = source->hour;
	u_time.tm_mday = source->day;
	u_time.tm_mon = source->month - 1;
	u_time.tm_year = source->year;

	if (u_time.tm_year < 80)
	{
		u_time.tm_year += 100;
	}
	return mktime(&u_time);
}

static void
assert_conn_locked(struct ncp_conn *conn)
{
	if (conn->lock == 0)
	{
		ncp_printf("ncpfs: conn not locked!\n");
	}
}

static void
ncp_add_byte(struct ncp_conn *conn, byte x)
{
	assert_conn_locked(conn);
	BSET(conn->packet, conn->current_size, x);
	conn->current_size += 1;
	return;
}

static void
ncp_add_word_lh(struct ncp_conn *conn, word x)
{
	assert_conn_locked(conn);
	WSET_LH(conn->packet, conn->current_size, x);
	conn->current_size += 2;
	return;
}

static void
ncp_add_dword_lh(struct ncp_conn *conn, dword x)
{
	assert_conn_locked(conn);
	DSET_LH(conn->packet, conn->current_size, x);
	conn->current_size += 4;
	return;
}

static void
ncp_add_word_hl(struct ncp_conn *conn, word x)
{
	assert_conn_locked(conn);
	WSET_HL(conn->packet, conn->current_size, x);
	conn->current_size += 2;
	return;
}

static void
ncp_add_dword_hl(struct ncp_conn *conn, dword x)
{
	assert_conn_locked(conn);
	DSET_HL(conn->packet, conn->current_size, x);
	conn->current_size += 4;
	return;
}

static void
ncp_add_mem(struct ncp_conn *conn, const void *source, int size)
{
	assert_conn_locked(conn);
	memcpy(&(conn->packet[conn->current_size]), source, size);
	conn->current_size += size;
	return;
}

static void
ncp_add_pstring(struct ncp_conn *conn, const char *s)
{
	int len = strlen(s);
	assert_conn_locked(conn);
	if (len > 255)
	{
		ncp_printf("ncpfs: string too long: %s\n", s);
		len = 255;
	}
	ncp_add_byte(conn, len);
	ncp_add_mem(conn, s, len);
	return;
}

static void
ncp_init_request(struct ncp_conn *conn)
{
	ncp_lock_conn(conn);

	conn->current_size = sizeof(struct ncp_request_header);
	conn->has_subfunction = 0;
}

static void
ncp_init_request_s(struct ncp_conn *conn, int subfunction)
{
	ncp_init_request(conn);
	ncp_add_word_lh(conn, 0);	/* preliminary size */

	ncp_add_byte(conn, subfunction);

	conn->has_subfunction = 1;
}

static char *
ncp_reply_data(struct ncp_conn *conn, int offset)
{
	return &(conn->packet[sizeof(struct ncp_reply_header) + offset]);
}

static byte
ncp_reply_byte(struct ncp_conn *conn, int offset)
{
	return *(byte *) (ncp_reply_data(conn, offset));
}

static word
ncp_reply_word_hl(struct ncp_conn *conn, int offset)
{
	return WVAL_HL(ncp_reply_data(conn, offset), 0);
}

static word
ncp_reply_word_lh(struct ncp_conn *conn, int offset)
{
	return WVAL_LH(ncp_reply_data(conn, offset), 0);
}

static dword
ncp_reply_dword_hl(struct ncp_conn *conn, int offset)
{
	return DVAL_HL(ncp_reply_data(conn, offset), 0);
}

static dword
ncp_reply_dword_lh(struct ncp_conn *conn, int offset)
{
	return DVAL_LH(ncp_reply_data(conn, offset), 0);
}

/* Here the ncp calls begin
 */

static long
ncp_negotiate_buffersize(struct ncp_conn *conn,
			 int size, int *target)
{
	long result;

	ncp_init_request(conn);
	ncp_add_word_hl(conn, size);

	if ((result = ncp_request(conn, 33)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	*target = min(ncp_reply_word_hl(conn, 0), size);

	ncp_unlock_conn(conn);
	return 0;
}


long
ncp_get_file_server_description_strings(struct ncp_conn *conn,
					char target[512])
{
	long result;

	ncp_init_request_s(conn, 201);

	if ((result = ncp_request(conn, 23)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	memcpy(target, ncp_reply_data(conn, 0), 512);
	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_get_file_server_time(struct ncp_conn *conn, time_t * target)
{
	long result;

	ncp_init_request(conn);

	if ((result = ncp_request(conn, 20)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	*target = nw_to_ctime((struct nw_time_buffer *) ncp_reply_data(conn, 0));
	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_set_file_server_time(struct ncp_conn *conn, time_t * source)
{
	long result;
	int year;
	struct tm *utime = localtime(source);

	year = utime->tm_year;
	if (year > 99)
	{
		year -= 100;
	}
	ncp_init_request_s(conn, 202);
	ncp_add_byte(conn, year);
	ncp_add_byte(conn, utime->tm_mon + 1);
	ncp_add_byte(conn, utime->tm_mday);
	ncp_add_byte(conn, utime->tm_hour);
	ncp_add_byte(conn, utime->tm_min);
	ncp_add_byte(conn, utime->tm_sec);

	result = ncp_request(conn, 23);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_get_file_server_information(struct ncp_conn *conn,
				struct ncp_file_server_info *target)
{
	long result;
	ncp_init_request_s(conn, 17);
	if ((result = ncp_request(conn, 23)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	memcpy(target, ncp_reply_data(conn, 0), sizeof(*target));
	target->MaximumServiceConnections
	    = htons(target->MaximumServiceConnections);
	target->ConnectionsInUse
	    = htons(target->ConnectionsInUse);
	target->MaxConnectionsEverUsed
	    = htons(target->MaxConnectionsEverUsed);
	target->NumberMountedVolumes
	    = htons(target->NumberMountedVolumes);
	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_get_connlist(struct ncp_conn *conn,
		 __u16 object_type, const char *object_name,
		 int *returned_no, __u8 conn_numbers[256])
{
	long result;

	ncp_init_request_s(conn, 21);
	ncp_add_word_hl(conn, object_type);
	ncp_add_pstring(conn, object_name);

	if ((result = ncp_request(conn, 23)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	*returned_no = ncp_reply_byte(conn, 0);
	memcpy(conn_numbers, ncp_reply_data(conn, 1), (*returned_no));
	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_get_stations_logged_info(struct ncp_conn *conn,
			     __u32 connection,
			     struct ncp_bindery_object *target,
			     time_t * login_time)
{
	long result;
	ncp_init_request_s(conn, 28);
	ncp_add_dword_lh(conn, connection);

	if ((result = ncp_request(conn, 23)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	memset(target, 0, sizeof(*target));
	target->object_id = ncp_reply_dword_hl(conn, 0);
	target->object_type = ncp_reply_word_hl(conn, 4);
	memcpy(target->object_name, ncp_reply_data(conn, 6),
	       sizeof(target->object_name));
	*login_time = nw_to_ctime((struct nw_time_buffer *)
				  ncp_reply_data(conn, 54));
	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_get_internet_address(struct ncp_conn *conn,
			 __u32 connection,
			 struct sockaddr_ipx *target,
			 __u8 * conn_type)
{
	long result;
	ncp_init_request_s(conn, 26);
	ncp_add_dword_lh(conn, connection);

	if ((result = ncp_request(conn, 23)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	memset(target, 0, sizeof(*target));
	target->sipx_network = ncp_reply_dword_lh(conn, 0);
	memcpy(&(target->sipx_node), ncp_reply_data(conn, 4), 6);
	target->sipx_port = ncp_reply_word_lh(conn, 10);
	*conn_type = ncp_reply_byte(conn, 12);
	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_send_broadcast(struct ncp_conn *conn,
		   __u8 no_conn, const __u8 * connections,
		   const char *message)
{
	long result;

	if (strlen(message) > 58)
	{
		return NCPL_ET_MSG_TOO_LONG;
	}
	ncp_init_request_s(conn, 0);
	ncp_add_byte(conn, no_conn);
	ncp_add_mem(conn, (char *) (connections), no_conn);
	ncp_add_pstring(conn, message);

	result = ncp_request(conn, 21);
	ncp_unlock_conn(conn);
	return result;
}

/*
 * target is a 8-byte buffer
 */
long
ncp_get_encryption_key(struct ncp_conn *conn,
		       char *target)
{
	long result;

	ncp_init_request_s(conn, 23);

	if ((result = ncp_request(conn, 23)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	if (conn->ncp_reply_size < 8)
	{
		ncp_printf("ncp_reply_size %d < 8\n",
			   conn->ncp_reply_size);
		ncp_unlock_conn(conn);
		return result;
	}
	memcpy(target, ncp_reply_data(conn, 0), 8);
	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_get_bindery_object_id(struct ncp_conn *conn,
			  __u16 object_type,
			  const char *object_name,
			  struct ncp_bindery_object *target)
{
	long result;
	ncp_init_request_s(conn, 53);
	ncp_add_word_hl(conn, object_type);
	ncp_add_pstring(conn, object_name);

	if ((result = ncp_request(conn, 23)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	if (conn->ncp_reply_size < 54)
	{
		ncp_printf("ncp_reply_size %d < 54\n",
			   conn->ncp_reply_size);
		ncp_unlock_conn(conn);
		return result;
	}
	target->object_id = ncp_reply_dword_hl(conn, 0);
	target->object_type = ncp_reply_word_hl(conn, 4);
	memcpy(target->object_name, ncp_reply_data(conn, 6), 48);
	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_get_bindery_object_name(struct ncp_conn *conn,
			    __u32 object_id,
			    struct ncp_bindery_object *target)
{
	long result;
	ncp_init_request_s(conn, 54);
	ncp_add_dword_hl(conn, object_id);

	if ((result = ncp_request(conn, 23)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	target->object_id = ncp_reply_dword_hl(conn, 0);
	target->object_type = ncp_reply_word_hl(conn, 4);
	memcpy(target->object_name, ncp_reply_data(conn, 6), 48);
	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_scan_bindery_object(struct ncp_conn *conn,
			__u32 last_id, __u16 object_type, char *search_string,
			struct ncp_bindery_object *target)
{
	long result;
	ncp_init_request_s(conn, 55);
	ncp_add_dword_hl(conn, last_id);
	ncp_add_word_hl(conn, object_type);
	ncp_add_pstring(conn, search_string);

	if ((result = ncp_request(conn, 23)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	target->object_id = ncp_reply_dword_hl(conn, 0);
	target->object_type = ncp_reply_word_hl(conn, 4);
	memcpy(target->object_name, ncp_reply_data(conn, 6),
	       NCP_BINDERY_NAME_LEN);
	target->object_flags = ncp_reply_byte(conn, 54);
	target->object_security = ncp_reply_byte(conn, 55);
	target->object_has_prop = ncp_reply_byte(conn, 56);

	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_create_bindery_object(struct ncp_conn *conn,
			  __u16 object_type,
			  const char *object_name,
			  __u8 object_security,
			  __u8 object_status)
{
	long result;
	ncp_init_request_s(conn, 50);
	ncp_add_byte(conn, object_status);
	ncp_add_byte(conn, object_security);
	ncp_add_word_hl(conn, object_type);
	ncp_add_pstring(conn, object_name);

	result = ncp_request(conn, 23);
	ncp_unlock_conn(conn);
	return result;
}


long
ncp_delete_bindery_object(struct ncp_conn *conn,
			  __u16 object_type,
			  const char *object_name)
{
	long result;
	ncp_init_request_s(conn, 51);
	ncp_add_word_hl(conn, object_type);
	ncp_add_pstring(conn, object_name);

	result = ncp_request(conn, 23);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_read_property_value(struct ncp_conn *conn,
			int object_type, const char *object_name,
			int segment, const char *prop_name,
			struct nw_property *target)
{
	long result;
	ncp_init_request_s(conn, 61);
	ncp_add_word_hl(conn, object_type);
	ncp_add_pstring(conn, object_name);
	ncp_add_byte(conn, segment);
	ncp_add_pstring(conn, prop_name);

	if ((result = ncp_request(conn, 23)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	memcpy(&(target->value), ncp_reply_data(conn, 0), 128);
	target->more_flag = ncp_reply_byte(conn, 128);
	target->property_flag = ncp_reply_byte(conn, 129);
	ncp_unlock_conn(conn);
	return 0;
}


long
ncp_scan_property(struct ncp_conn *conn,
		  __u16 object_type, const char *object_name,
		  __u32 last_id, char *search_string,
		  struct ncp_property_info *property_info)
{
	long result;
	ncp_init_request_s(conn, 60);
	ncp_add_word_hl(conn, object_type);
	ncp_add_pstring(conn, object_name);
	ncp_add_dword_hl(conn, last_id);
	ncp_add_pstring(conn, search_string);

	if ((result = ncp_request(conn, 23)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	memcpy(property_info->property_name, ncp_reply_data(conn, 0), 16);
	property_info->property_flags = ncp_reply_byte(conn, 16);
	property_info->property_security = ncp_reply_byte(conn, 17);
	property_info->search_instance = ncp_reply_dword_hl(conn, 18);
	property_info->value_available_flag = ncp_reply_byte(conn, 22);
	property_info->more_properties_flag = ncp_reply_byte(conn, 23);
	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_add_object_to_set(struct ncp_conn *conn,
		      __u16 object_type, const char *object_name,
		      const char *property_name,
		      __u16 member_type,
		      const char *member_name)
{
	long result;
	ncp_init_request_s(conn, 65);
	ncp_add_word_hl(conn, object_type);
	ncp_add_pstring(conn, object_name);
	ncp_add_pstring(conn, property_name);
	ncp_add_word_hl(conn, member_type);
	ncp_add_pstring(conn, member_name);

	result = ncp_request(conn, 23);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_change_property_security(struct ncp_conn *conn,
			     __u16 object_type, const char *object_name,
			     const char *property_name,
			     __u8 property_security)
{
	long result;
	ncp_init_request_s(conn, 59);
	ncp_add_word_hl(conn, object_type);
	ncp_add_pstring(conn, object_name);
	ncp_add_byte(conn, property_security);
	ncp_add_pstring(conn, property_name);

	result = ncp_request(conn, 23);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_create_property(struct ncp_conn *conn,
		    __u16 object_type, const char *object_name,
		    const char *property_name,
		    __u8 property_flags, __u8 property_security)
{
	long result;
	ncp_init_request_s(conn, 57);
	ncp_add_word_hl(conn, object_type);
	ncp_add_pstring(conn, object_name);
	ncp_add_byte(conn, property_flags);
	ncp_add_byte(conn, property_security);
	ncp_add_pstring(conn, property_name);

	result = ncp_request(conn, 23);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_delete_object_from_set(struct ncp_conn *conn,
			   __u16 object_type, const char *object_name,
			   const char *property_name,
			   __u16 member_type,
			   const char *member_name)
{
	long result;
	ncp_init_request_s(conn, 66);
	ncp_add_word_hl(conn, object_type);
	ncp_add_pstring(conn, object_name);
	ncp_add_pstring(conn, property_name);
	ncp_add_word_hl(conn, member_type);
	ncp_add_pstring(conn, member_name);

	result = ncp_request(conn, 23);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_delete_property(struct ncp_conn *conn,
		    __u16 object_type, const char *object_name,
		    const char *property_name)
{
	long result;
	ncp_init_request_s(conn, 58);
	ncp_add_word_hl(conn, object_type);
	ncp_add_pstring(conn, object_name);
	ncp_add_pstring(conn, property_name);

	result = ncp_request(conn, 23);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_write_property_value(struct ncp_conn *conn,
			 __u16 object_type, const char *object_name,
			 const char *property_name,
			 __u8 segment,
			 struct nw_property *property_value)
{
	long result;
	ncp_init_request_s(conn, 62);
	ncp_add_word_hl(conn, object_type);
	ncp_add_pstring(conn, object_name);
	ncp_add_byte(conn, segment);
	ncp_add_byte(conn, property_value->more_flag);
	ncp_add_pstring(conn, property_name);
	ncp_add_mem(conn, property_value->value, 128);

	result = ncp_request(conn, 23);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_get_big_ncp_max_packet_size(struct ncp_conn *conn,
				__u16 proposed_max_size,
				__u8 proposed_security_flag,
				__u16 * accepted_max_size,
				__u16 * echo_socket,
				__u8 * accepted_security_flag)
{
	long result;
	ncp_init_request(conn);
	ncp_add_word_hl(conn, proposed_max_size);
	ncp_add_byte(conn, proposed_security_flag);

	if ((result = ncp_request(conn, 97)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	*accepted_max_size = ncp_reply_word_hl(conn, 0);
	*echo_socket = ncp_reply_word_hl(conn, 2);
	*accepted_security_flag = ncp_reply_byte(conn, 4);
	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_login_encrypted(struct ncp_conn *conn,
		    const struct ncp_bindery_object *object,
		    const unsigned char *key,
		    const unsigned char *passwd)
{
	dword tmpID = htonl(object->object_id);
	unsigned char buf[128];
	unsigned char encrypted[8];
	long result;

	shuffle((byte *) & tmpID, passwd, strlen(passwd), buf);
	nw_encrypt(key, buf, encrypted);

	ncp_init_request_s(conn, 24);
	ncp_add_mem(conn, encrypted, 8);
	ncp_add_word_hl(conn, object->object_type);
	ncp_add_pstring(conn, object->object_name);

	result = ncp_request(conn, 23);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_login_unencrypted(struct ncp_conn *conn,
		      __u16 object_type, const char *object_name,
		      const unsigned char *passwd)
{
	long result;
	ncp_init_request_s(conn, 20);
	ncp_add_word_hl(conn, object_type);
	ncp_add_pstring(conn, object_name);
	ncp_add_pstring(conn, passwd);
	result = ncp_request(conn, 23);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_change_login_passwd(struct ncp_conn *conn,
			const struct ncp_bindery_object *object,
			const unsigned char *key,
			const unsigned char *oldpasswd,
			const unsigned char *newpasswd)
{
	long id = htonl(object->object_id);
	unsigned char cryptkey[8];
	unsigned char newpwd[16];	/* new passwd as stored by server */
	unsigned char oldpwd[16];	/* old passwd as stored by server */
	unsigned char len;
	long result;

	memcpy(cryptkey, key, 8);
	shuffle((byte *) & id, oldpasswd, strlen(oldpasswd), oldpwd);
	shuffle((byte *) & id, newpasswd, strlen(newpasswd), newpwd);
	nw_encrypt(cryptkey, oldpwd, cryptkey);
	newpassencrypt(oldpwd, newpwd, newpwd);
	newpassencrypt(oldpwd + 8, newpwd + 8, newpwd + 8);
	if ((len = strlen(newpasswd)) > 63)
	{
		len = 63;
	}
	len = ((len ^ oldpwd[0] ^ oldpwd[1]) & 0x7f) | 0x40;

	ncp_init_request_s(conn, 75);
	ncp_add_mem(conn, cryptkey, 8);
	ncp_add_word_hl(conn, object->object_type);
	ncp_add_pstring(conn, object->object_name);
	ncp_add_byte(conn, len);
	ncp_add_mem(conn, newpwd, 16);
	result = ncp_request(conn, 23);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_login_user(struct ncp_conn *conn,
	       const unsigned char *username,
	       const unsigned char *password)
{
	return ncp_login_object(conn, username, NCP_BINDERY_USER, password);
}

static long
ncp_login_object(struct ncp_conn *conn,
		 const unsigned char *username,
		 int login_type,
		 const unsigned char *password)
{
	long result;
	unsigned char ncp_key[8];
	struct ncp_bindery_object user;

	if ((result = ncp_get_encryption_key(conn, ncp_key)) != 0)
	{
		return ncp_login_unencrypted(conn, login_type, username,
					     password);
	}
	if ((result = ncp_get_bindery_object_id(conn, login_type,
						username, &user)) != 0)
	{
		return result;
	}
	if ((result = ncp_login_encrypted(conn, &user,
					  ncp_key, password)) != 0)
	{
		struct nw_property p;
		struct ncp_prop_login_control *l
		= (struct ncp_prop_login_control *) &p;

		if (conn->completion != NCP_GRACE_PERIOD)
		{
			return result;
		}
		fprintf(stderr, "Your password has expired\n");

		if ((result = ncp_read_property_value(conn, NCP_BINDERY_USER,
						      username, 1,
						      "LOGIN_CONTROL",
						      &p)) == 0)
		{
			fprintf(stderr, "You have %d login attempts left\n",
				l->GraceLogins);
		}
	}
	return 0;
}

long
ncp_get_volume_info_with_number(struct ncp_conn *conn, int n,
				struct ncp_volume_info *target)
{
	long result;
	int len;

	ncp_init_request_s(conn, 44);
	ncp_add_byte(conn, n);

	if ((result = ncp_request(conn, 22)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	target->total_blocks = ncp_reply_dword_lh(conn, 0);
	target->free_blocks = ncp_reply_dword_lh(conn, 4);
	target->purgeable_blocks = ncp_reply_dword_lh(conn, 8);
	target->not_yet_purgeable_blocks = ncp_reply_dword_lh(conn, 12);
	target->total_dir_entries = ncp_reply_dword_lh(conn, 16);
	target->available_dir_entries = ncp_reply_dword_lh(conn, 20);
	target->sectors_per_block = ncp_reply_byte(conn, 28);

	memzero(target->volume_name);

	len = ncp_reply_byte(conn, 29);
	if (len > NCP_VOLNAME_LEN)
	{
		ncp_printf("ncpfs: volume name too long: %d\n", len);
		ncp_unlock_conn(conn);
		return -EIO;
	}
	memcpy(&(target->volume_name), ncp_reply_data(conn, 30), len);
	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_get_volume_number(struct ncp_conn *conn, const char *name, int *target)
{
	long result;

	ncp_init_request_s(conn, 5);
	ncp_add_pstring(conn, name);

	if ((result = ncp_request(conn, 22)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	*target = ncp_reply_byte(conn, 0);
	ncp_unlock_conn(conn);
	return 0;
}


long
ncp_file_search_init(struct ncp_conn *conn,
		     int dir_handle, const char *path,
		     struct ncp_filesearch_info *target)
{
	long result;

	ncp_init_request(conn);
	ncp_add_byte(conn, dir_handle);
	ncp_add_pstring(conn, path);

	if ((result = ncp_request(conn, 62)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	target->volume_number = ncp_reply_byte(conn, 0);
	target->directory_id = ncp_reply_word_hl(conn, 1);
	target->sequence_no = ncp_reply_word_hl(conn, 3);
	target->access_rights = ncp_reply_byte(conn, 5);
	ncp_unlock_conn(conn);
	return 0;
}


long
ncp_file_search_continue(struct ncp_conn *conn,
			 struct ncp_filesearch_info *fsinfo,
			 int attributes, const char *name,
			 struct ncp_file_info *target)
{
	long result;

	ncp_init_request(conn);

	ncp_add_byte(conn, fsinfo->volume_number);
	ncp_add_word_hl(conn, fsinfo->directory_id);
	ncp_add_word_hl(conn, fsinfo->sequence_no);

	ncp_add_byte(conn, attributes);
	ncp_add_pstring(conn, name);

	if ((result = ncp_request(conn, 63)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	fsinfo->sequence_no = ncp_reply_word_hl(conn, 0);

	memzero(target->file_name);
	memcpy(&(target->file_name), ncp_reply_data(conn, 4),
	       NCP_MAX_FILENAME);

	target->file_attributes = ncp_reply_byte(conn, 18);
	target->file_mode = ncp_reply_byte(conn, 19);
	target->file_length = ncp_reply_dword_hl(conn, 20);
	target->creation_date = ncp_reply_word_hl(conn, 24);
	target->access_date = ncp_reply_word_hl(conn, 26);
	target->update_date = ncp_reply_word_hl(conn, 28);
	target->update_time = ncp_reply_word_hl(conn, 30);

	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_get_finfo(struct ncp_conn *conn,
	      int dir_handle, const char *path, const char *name,
	      struct ncp_file_info *target)
{
	long result;

	struct ncp_filesearch_info fsinfo;

	if ((result = ncp_file_search_init(conn, dir_handle, path,
					   &fsinfo)) != 0)
	{
		return result;
	}
	if ((result = ncp_file_search_continue(conn, &fsinfo, 0, name,
					       target)) == 0)
	{
		return result;
	}
	if ((result = ncp_file_search_init(conn, dir_handle, path,
					   &fsinfo)) != 0)
	{
		return result;
	}
	return ncp_file_search_continue(conn, &fsinfo, aDIR, name, target);
}

long
ncp_open_file(struct ncp_conn *conn,
	      int dir_handle, const char *path,
	      int attr, int access,
	      struct ncp_file_info *target)
{
	long result;

	ncp_init_request(conn);
	ncp_add_byte(conn, dir_handle);
	ncp_add_byte(conn, attr);
	ncp_add_byte(conn, access);
	ncp_add_pstring(conn, path);

	if ((result = ncp_request(conn, 76)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	memcpy(&(target->file_id), ncp_reply_data(conn, 0),
	       NCP_FILE_ID_LEN);

	memzero(target->file_name);
	memcpy(&(target->file_name), ncp_reply_data(conn, 8),
	       NCP_MAX_FILENAME);

	target->file_attributes = ncp_reply_byte(conn, 22);
	target->file_mode = ncp_reply_byte(conn, 23);
	target->file_length = ncp_reply_dword_hl(conn, 24);
	target->creation_date = ncp_reply_word_hl(conn, 28);
	target->access_date = ncp_reply_word_hl(conn, 30);
	target->update_date = ncp_reply_word_hl(conn, 32);
	target->update_time = ncp_reply_word_hl(conn, 34);

	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_close_file(struct ncp_conn *conn, const char *file_id)
{
	long result;

	ncp_init_request(conn);
	ncp_add_byte(conn, 0);
	ncp_add_mem(conn, file_id, 6);

	result = ncp_request(conn, 66);
	ncp_unlock_conn(conn);
	return result;
}

static int
ncp_do_create(struct ncp_conn *conn,
	      int dir_handle, const char *path,
	      int attr,
	      struct ncp_file_info *target,
	      int function)
{
	long result;

	ncp_init_request(conn);
	ncp_add_byte(conn, dir_handle);
	ncp_add_byte(conn, attr);
	ncp_add_pstring(conn, path);

	if ((result = ncp_request(conn, function)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	memcpy(&(target->file_id), ncp_reply_data(conn, 0),
	       NCP_FILE_ID_LEN);

	memzero(target->file_name);
	memcpy(&(target->file_name), ncp_reply_data(conn, 8),
	       NCP_MAX_FILENAME);

	target->file_attributes = ncp_reply_byte(conn, 22);
	target->file_mode = ncp_reply_byte(conn, 23);
	target->file_length = ncp_reply_dword_hl(conn, 24);
	target->creation_date = ncp_reply_word_hl(conn, 28);
	target->access_date = ncp_reply_word_hl(conn, 30);
	target->update_date = ncp_reply_word_hl(conn, 32);
	target->update_time = ncp_reply_word_hl(conn, 34);

	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_create_newfile(struct ncp_conn *conn,
		   int dir_handle, const char *path,
		   int attr,
		   struct ncp_file_info *target)
{
	return ncp_do_create(conn, dir_handle, path, attr, target, 77);
}

long
ncp_create_file(struct ncp_conn *conn,
		int dir_handle, const char *path,
		int attr,
		struct ncp_file_info *target)
{
	return ncp_do_create(conn, dir_handle, path, attr, target, 67);
}

long
ncp_erase_file(struct ncp_conn *conn,
	       int dir_handle, const char *path,
	       int attr)
{
	long result;

	ncp_init_request(conn);
	ncp_add_byte(conn, dir_handle);
	ncp_add_byte(conn, attr);
	ncp_add_pstring(conn, path);

	result = ncp_request(conn, 68);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_rename_file(struct ncp_conn *conn,
		int old_handle, const char *old_path,
		int attr,
		int new_handle, const char *new_path)
{
	long result;

	ncp_init_request(conn);
	ncp_add_byte(conn, old_handle);
	ncp_add_byte(conn, attr);
	ncp_add_pstring(conn, old_path);
	ncp_add_byte(conn, new_handle);
	ncp_add_pstring(conn, new_path);

	if ((result = ncp_request(conn, 69)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_create_directory(struct ncp_conn *conn,
		     int dir_handle, const char *path,
		     int inherit_mask)
{
	long result;

	ncp_init_request_s(conn, 10);
	ncp_add_byte(conn, dir_handle);
	ncp_add_byte(conn, inherit_mask);
	ncp_add_pstring(conn, path);

	result = ncp_request(conn, 22);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_delete_directory(struct ncp_conn *conn,
		     int dir_handle, const char *path)
{
	long result;

	ncp_init_request_s(conn, 11);
	ncp_add_byte(conn, dir_handle);
	ncp_add_byte(conn, 0);	/* reserved */
	ncp_add_pstring(conn, path);

	result = ncp_request(conn, 22);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_add_trustee(struct ncp_conn *conn,
		int dir_handle, const char *path,
		__u32 object_id, __u8 rights)
{
	long result;

	ncp_init_request_s(conn, 13);
	ncp_add_byte(conn, dir_handle);
	ncp_add_dword_hl(conn, object_id);
	ncp_add_byte(conn, rights);
	ncp_add_pstring(conn, path);

	result = ncp_request(conn, 22);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_delete_trustee(struct ncp_conn *conn,
		   int dir_handle, const char *path, __u32 object_id)
{
	long result;

	ncp_init_request_s(conn, 14);
	ncp_add_byte(conn, dir_handle);
	ncp_add_dword_hl(conn, object_id);
	ncp_add_byte(conn, 0);
	ncp_add_pstring(conn, path);

	result = ncp_request(conn, 22);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_rename_directory(struct ncp_conn *conn,
		     int dir_handle,
		     const char *old_path, const char *new_path)
{
	long result;

	ncp_init_request_s(conn, 15);
	ncp_add_byte(conn, dir_handle);
	ncp_add_pstring(conn, old_path);
	ncp_add_pstring(conn, new_path);

	result = ncp_request(conn, 22);
	ncp_unlock_conn(conn);
	return result;
}

static void
ncp_add_handle_path(struct ncp_conn *conn,
		    __u8 vol_num,
		    __u32 dir_base, int have_dir_base,
		    const char *path)
{
	ncp_add_byte(conn, vol_num);
	ncp_add_dword_lh(conn, dir_base);
	if (have_dir_base != 0)
	{
		ncp_add_byte(conn, 1);	/* dir_base */
	} else
	{
		ncp_add_byte(conn, 0xff);	/* no handle */
	}
	if (path != NULL)
	{
		ncp_add_byte(conn, 1);	/* 1 component */
		ncp_add_pstring(conn, path);
	} else
	{
		ncp_add_byte(conn, 0);
	}
}

static void
ncp_extract_file_info(void *structure, struct nw_info_struct *target)
{
	__u8 *name_len;
	const int info_struct_size = sizeof(struct nw_info_struct) - 257;

	memcpy(target, structure, info_struct_size);
	name_len = structure + info_struct_size;
	target->nameLen = *name_len;
	strncpy(target->entryName, name_len + 1, *name_len);
	target->entryName[*name_len] = '\0';
	return;
}

long
ncp_obtain_file_or_subdir_info(struct ncp_conn *conn,
			       __u8 source_ns, __u8 target_ns,
			       __u16 search_attribs, __u32 rim,
			       __u8 vol, __u32 dirent, const char *path,
			       struct nw_info_struct *target)
{
	long result;

	ncp_init_request(conn);
	ncp_add_byte(conn, 6);
	ncp_add_byte(conn, source_ns);
	ncp_add_byte(conn, target_ns);
	ncp_add_word_lh(conn, search_attribs);
	ncp_add_dword_lh(conn, rim);
	ncp_add_handle_path(conn, vol, dirent, 1, path);

	if ((result = ncp_request(conn, 87)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	ncp_extract_file_info(ncp_reply_data(conn, 0), target);
	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_get_eff_directory_rights(struct ncp_conn *conn,
			     __u8 source_ns, __u8 target_ns,
			     __u16 search_attribs,
			     __u8 vol, __u32 dirent, const char *path,
			     __u16 * my_effective_rights)
{
	long result;

	ncp_init_request(conn);
	ncp_add_byte(conn, 29);
	ncp_add_byte(conn, source_ns);
	ncp_add_byte(conn, target_ns);
	ncp_add_word_lh(conn, search_attribs);
	ncp_add_dword_lh(conn, 0);
	ncp_add_handle_path(conn, vol, dirent, 1, path);

	if ((result = ncp_request(conn, 87)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	*my_effective_rights = ncp_reply_word_lh(conn, 0);
	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_do_lookup(struct ncp_conn *conn,
	      struct nw_info_struct *dir,
	      char *path,	/* may only be one component */
	      struct nw_info_struct *target)
{
	__u8 vol_num;
	__u32 dir_base;
	long result;
	char *volname = NULL;

	if (target == NULL)
	{
		return -EINVAL;
	}
	if (dir == NULL)
	{

		/* Access a volume's root directory */
		ncp_init_request(conn);
		ncp_add_byte(conn, 22);		/* subfunction */
		ncp_add_byte(conn, 0);	/* dos name space */
		ncp_add_byte(conn, 0);	/* reserved */
		ncp_add_byte(conn, 0);	/* reserved */
		ncp_add_byte(conn, 0);	/* reserved */
		ncp_add_handle_path(conn, 0, 0, 0,	/* no handle */
				    path);

		if ((result = ncp_request(conn, 87)) != 0)
		{
			ncp_unlock_conn(conn);
			return result;
		}
		dir_base = ncp_reply_dword_lh(conn, 4);
		vol_num = ncp_reply_byte(conn, 8);
		ncp_unlock_conn(conn);
		volname = path;
		path = NULL;
	} else
	{
		vol_num = dir->volNumber;
		dir_base = dir->DosDirNum;
	}

	ncp_init_request(conn);
	ncp_add_byte(conn, 6);	/* subfunction */
	ncp_add_byte(conn, 0);	/* dos name space */
	ncp_add_byte(conn, 0);	/* dos name space as dest */
	ncp_add_word_lh(conn, 0xff);	/* get all */
	ncp_add_dword_lh(conn, RIM_ALL);
	ncp_add_handle_path(conn, vol_num, dir_base, 1,
			    path);

	if ((result = ncp_request(conn, 87)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	ncp_extract_file_info(ncp_reply_data(conn, 0), target);

	if (volname != NULL)
	{
		target->nameLen = strlen(volname);
		strcpy(target->entryName, volname);
	}
	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_modify_file_or_subdir_dos_info(struct ncp_conn *conn,
				   struct nw_info_struct *file,
				   __u32 info_mask,
				   struct nw_modify_dos_info *info)
{
	long result;

	ncp_init_request(conn);
	ncp_add_byte(conn, 7);	/* subfunction */
	ncp_add_byte(conn, 0);	/* dos name space */
	ncp_add_byte(conn, 0);	/* reserved */
	ncp_add_word_lh(conn, 0x8006);	/* search attribs: all */

	ncp_add_dword_lh(conn, info_mask);
	ncp_add_mem(conn, info, sizeof(*info));
	ncp_add_handle_path(conn, file->volNumber,
			    file->DosDirNum, 1, NULL);

	result = ncp_request(conn, 87);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_del_file_or_subdir(struct ncp_conn *conn,
		       struct nw_info_struct *dir, char *name)
{
	long result;

	ncp_init_request(conn);
	ncp_add_byte(conn, 8);	/* subfunction */
	ncp_add_byte(conn, 0);	/* dos name space */
	ncp_add_byte(conn, 0);	/* reserved */
	ncp_add_word_lh(conn, 0x8006);	/* search attribs: all */
	ncp_add_handle_path(conn, dir->volNumber,
			    dir->DosDirNum, 1, name);

	result = ncp_request(conn, 87);
	ncp_unlock_conn(conn);
	return result;
}

static inline void
ConvertToNWfromDWORD(__u32 sfd, __u8 ret[6])
{
	__u16 *dest = (__u16 *) ret;
	memcpy(&(dest[1]), &sfd, 4);
	dest[0] = dest[1] + 1;
	return;
}

long
ncp_open_create_file_or_subdir(struct ncp_conn *conn,
			       struct nw_info_struct *dir, char *name,
			       int open_create_mode,
			       __u32 create_attributes,
			       int desired_acc_rights,
			       struct nw_file_info *target)
{
	long result;

	target->opened = 0;

	ncp_init_request(conn);
	ncp_add_byte(conn, 1);	/* subfunction */
	ncp_add_byte(conn, 0);	/* dos name space */
	ncp_add_byte(conn, open_create_mode);
	ncp_add_word_lh(conn, 0x8006);
	ncp_add_dword_lh(conn, RIM_ALL);
	ncp_add_dword_lh(conn, create_attributes);
	/* The desired acc rights seem to be the inherited rights mask
	   for directories */
	ncp_add_word_lh(conn, desired_acc_rights);
	ncp_add_handle_path(conn, dir->volNumber,
			    dir->DosDirNum, 1, name);

	if ((result = ncp_request(conn, 87)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	target->opened = 1;
	target->server_file_handle = ncp_reply_dword_lh(conn, 0);
	target->open_create_action = ncp_reply_byte(conn, 4);
	ncp_extract_file_info(ncp_reply_data(conn, 5), &(target->i));
	ConvertToNWfromDWORD(target->server_file_handle, target->file_handle);

	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_initialize_search(struct ncp_conn *conn,
		      const struct nw_info_struct *dir,
		      int namespace,
		      struct ncp_search_seq *target)
{
	long result;

	if ((namespace < 0) || (namespace > 255))
	{
		return EINVAL;
	}
	memzero(*target);

	ncp_init_request(conn);
	ncp_add_byte(conn, 2);	/* subfunction */
	ncp_add_byte(conn, namespace);
	ncp_add_byte(conn, 0);	/* reserved */
	ncp_add_handle_path(conn, dir->volNumber,
			    dir->DosDirNum, 1, NULL);

	if ((result = ncp_request(conn, 87)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	memcpy(&(target->s), ncp_reply_data(conn, 0), 9);
	target->namespace = namespace;

	ncp_unlock_conn(conn);
	return 0;
}

/* Search for everything */
long
ncp_search_for_file_or_subdir(struct ncp_conn *conn,
			      struct ncp_search_seq *seq,
			      struct nw_info_struct *target)
{
	long result;

	ncp_init_request(conn);
	ncp_add_byte(conn, 3);	/* subfunction */
	ncp_add_byte(conn, seq->namespace);
	ncp_add_byte(conn, 0);	/* data stream (???) */
	ncp_add_word_lh(conn, 0xffff);	/* Search attribs */
	ncp_add_dword_lh(conn, RIM_ALL);	/* return info mask */
	ncp_add_mem(conn, &(seq->s), 9);
	ncp_add_byte(conn, 2);	/* 2 byte pattern */
	ncp_add_byte(conn, 0xff);	/* following is a wildcard */
	ncp_add_byte(conn, '*');

	if ((result = ncp_request(conn, 87)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	memcpy(seq, ncp_reply_data(conn, 0), sizeof(*seq));
	ncp_extract_file_info(ncp_reply_data(conn, 10), target);

	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_ren_or_mov_file_or_subdir(struct ncp_conn *conn,
			      struct nw_info_struct *old_dir, char *old_name,
			      struct nw_info_struct *new_dir, char *new_name)
{
	long result;

	if ((old_dir == NULL) || (old_name == NULL)
	    || (new_dir == NULL) || (new_name == NULL))
		return -EINVAL;

	ncp_init_request(conn);
	ncp_add_byte(conn, 4);	/* subfunction */
	ncp_add_byte(conn, 0);	/* dos name space */
	ncp_add_byte(conn, 1);	/* rename flag */
	ncp_add_word_lh(conn, 0x8006);	/* search attributes */

	/* source Handle Path */
	ncp_add_byte(conn, old_dir->volNumber);
	ncp_add_dword_lh(conn, old_dir->DosDirNum);
	ncp_add_byte(conn, 1);
	ncp_add_byte(conn, 1);	/* 1 source component */

	/* dest Handle Path */
	ncp_add_byte(conn, new_dir->volNumber);
	ncp_add_dword_lh(conn, new_dir->DosDirNum);
	ncp_add_byte(conn, 1);
	ncp_add_byte(conn, 1);	/* 1 destination component */

	/* source path string */
	ncp_add_pstring(conn, old_name);
	/* dest path string */
	ncp_add_pstring(conn, new_name);

	result = ncp_request(conn, 87);
	ncp_unlock_conn(conn);
	return result;
}


/* Create a new job entry */
long
ncp_create_queue_job_and_file(struct ncp_conn *conn,
			      __u32 queue_id,
			      struct queue_job *job)
{
	long result;

	ncp_init_request_s(conn, 121);
	ncp_add_dword_hl(conn, queue_id);
	ncp_add_mem(conn, &(job->j), sizeof(job->j));

	if ((result = ncp_request(conn, 23)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	memcpy(&(job->j), ncp_reply_data(conn, 0), 78);
	ConvertToNWfromDWORD(job->j.JobFileHandle, job->file_handle);

	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_close_file_and_start_job(struct ncp_conn *conn,
			     __u32 queue_id,
			     struct queue_job *job)
{
	long result;

	ncp_init_request_s(conn, 127);
	ncp_add_dword_hl(conn, queue_id);
	ncp_add_dword_lh(conn, job->j.JobNumber);

	result = ncp_request(conn, 23);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_attach_to_queue(struct ncp_conn *conn,
		    __u32 queue_id)
{
	long result;

	ncp_init_request_s(conn, 111);
	ncp_add_dword_hl(conn, queue_id);

	result = ncp_request(conn, 23);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_detach_from_queue(struct ncp_conn *conn,
		      __u32 queue_id)
{
	long result;

	ncp_init_request_s(conn, 112);
	ncp_add_dword_hl(conn, queue_id);

	result = ncp_request(conn, 23);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_service_queue_job(struct ncp_conn *conn, __u32 queue_id, __u16 job_type,
		      struct queue_job *job)
{
	long result;

	ncp_init_request_s(conn, 124);
	ncp_add_dword_hl(conn, queue_id);
	ncp_add_word_hl(conn, job_type);

	if ((result = ncp_request(conn, 23)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	memcpy(&(job->j), ncp_reply_data(conn, 0), 78);
	ConvertToNWfromDWORD(job->j.JobFileHandle, job->file_handle);

	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_finish_servicing_job(struct ncp_conn *conn, __u32 queue_id,
			 __u32 job_number, __u32 charge_info)
{
	long result;

	ncp_init_request_s(conn, 131);
	ncp_add_dword_hl(conn, queue_id);
	ncp_add_dword_lh(conn, job_number);
	ncp_add_dword_hl(conn, charge_info);

	result = ncp_request(conn, 23);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_abort_servicing_job(struct ncp_conn *conn, __u32 queue_id,
			__u32 job_number)
{
	long result;

	ncp_init_request_s(conn, 132);
	ncp_add_dword_hl(conn, queue_id);
	ncp_add_dword_lh(conn, job_number);

	result = ncp_request(conn, 23);
	ncp_unlock_conn(conn);
	return result;
}

static int
ncp_do_read(struct ncp_conn *conn, const char *file_id,
	    __u32 offset, __u16 to_read,
	    char *target, int *bytes_read)
{
	long result;

	ncp_init_request(conn);
	ncp_add_byte(conn, 0);
	ncp_add_mem(conn, file_id, 6);
	ncp_add_dword_hl(conn, offset);
	ncp_add_word_hl(conn, to_read);

	if ((result = ncp_request(conn, 72)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	*bytes_read = ncp_reply_word_hl(conn, 0);

	memcpy(target, ncp_reply_data(conn, 2), *bytes_read);

	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_read(struct ncp_conn *conn, const char *file_id,
	 off_t offset, size_t count, char *target)
{
	const int bufsize = conn->i.buffer_size;
	int already_read = 0;

	while (already_read < count)
	{
		int read_this_time;
		int to_read = min(bufsize - (offset % bufsize),
				  count - already_read);

		if (ncp_do_read(conn, file_id, offset, to_read,
				target, &read_this_time) != 0)
		{
			return -1;
		}
		offset += read_this_time;
		target += read_this_time;
		already_read += read_this_time;

		if (read_this_time < to_read)
		{
			break;
		}
	}
	return already_read;
}

static int
ncp_do_write(struct ncp_conn *conn, const char *file_id,
	     __u32 offset, __u16 to_write,
	     const char *source, int *bytes_written)
{
	long result;

	ncp_init_request(conn);
	ncp_add_byte(conn, 0);
	ncp_add_mem(conn, file_id, 6);
	ncp_add_dword_hl(conn, offset);
	ncp_add_word_hl(conn, to_write);
	ncp_add_mem(conn, source, to_write);

	if ((result = ncp_request(conn, 73)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	*bytes_written = to_write;

	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_write(struct ncp_conn *conn, const char *file_id,
	  off_t offset, size_t count, const char *source)
{
	const int bufsize = conn->i.buffer_size;
	int already_written = 0;

	while (already_written < count)
	{
		int written_this_time;
		int to_write = min(bufsize - (offset % bufsize),
				   count - already_written);

		if (ncp_do_write(conn, file_id, offset, to_write,
				 source, &written_this_time) != 0)
		{
			return -1;
		}
		offset += written_this_time;
		source += written_this_time;
		already_written += written_this_time;

		if (written_this_time < to_write)
		{
			break;
		}
	}
	return already_written;
}

long
ncp_copy_file(struct ncp_conn *conn,
	      const char source_file[6],
	      const char target_file[6],
	      __u32 source_offset,
	      __u32 target_offset,
	      __u32 count,
	      __u32 * copied_count)
{
	long result;

	ncp_init_request(conn);

	ncp_add_byte(conn, 0);	/* reserved */
	ncp_add_mem(conn, source_file, 6);
	ncp_add_mem(conn, target_file, 6);
	ncp_add_dword_hl(conn, source_offset);
	ncp_add_dword_hl(conn, target_offset);
	ncp_add_dword_hl(conn, count);

	if ((result = ncp_request(conn, 74)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	*copied_count = ncp_reply_dword_hl(conn, 0);
	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_get_broadcast_message(struct ncp_conn *conn, char message[256])
{
	long result;
	int length;

	ncp_init_request_s(conn, 1);

	if ((result = ncp_request(conn, 21)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	length = ncp_reply_byte(conn, 0);
	message[length] = 0;
	memcpy(message, ncp_reply_data(conn, 1), length);
	ncp_unlock_conn(conn);
	return 0;
}

long
ncp_dealloc_dir_handle(struct ncp_conn *conn, __u8 dir_handle)
{
	long result;

	ncp_init_request_s(conn, 20);
	ncp_add_byte(conn, dir_handle);

	result = ncp_request(conn, 22);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_alloc_short_dir_handle(struct ncp_conn *conn,
			   struct nw_info_struct *dir,
			   word alloc_mode,
			   byte * target)
{
	long result;

	ncp_init_request(conn);
	ncp_add_byte(conn, 12);	/* subfunction */
	ncp_add_byte(conn, 0);	/* dos name space */
	ncp_add_byte(conn, 0);	/* reserved */
	ncp_add_word_hl(conn, alloc_mode);
	ncp_add_handle_path(conn, dir->volNumber, dir->DosDirNum,
			    1, NULL);

	if ((result = ncp_request(conn, 87)) != 0)
	{
		ncp_unlock_conn(conn);
		return result;
	}
	*target = ncp_reply_byte(conn, 0);
	ncp_unlock_conn(conn);
	return result;
}

long
ncp_add_trustee_set(struct ncp_conn *conn,
		    __u8 volume_number, __u32 dir_entry,
		    __u16 rights_mask,
		    int object_count, struct ncp_trustee_struct *rights)
{
	long result = 0;

	ncp_init_request(conn);
	ncp_add_byte(conn, 10);	/* subfunction */
	ncp_add_byte(conn, 0);	/* dos name space */
	ncp_add_byte(conn, 0);	/* reserved */
	ncp_add_word_lh(conn, 0x8006);
	ncp_add_word_lh(conn, rights_mask);
	ncp_add_word_lh(conn, object_count);
	ncp_add_handle_path(conn, volume_number, dir_entry, 1, NULL);

	while (object_count > 0)
	{
		ncp_add_dword_hl(conn, rights->object_id);
		ncp_add_word_lh(conn, rights->rights);
		object_count -= 1;
		rights += 1;
	}

	result = ncp_request(conn, 87);
	ncp_unlock_conn(conn);
	return result;
}