/*********************************************************************\
* Copyright (c) 1991 by Wen-King Su (wen-king@vlsi.cs.caltech.edu) *
* *
* You may copy or modify this file in any manner you wish, provided *
* that this notice is always included, and that you hold the author *
* harmless for any loss or damage resulting from the installation or *
* use of this software. *
\*********************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <string.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <dirent.h>
#ifdef HAVE_VFORK_H
# include <vfork.h>
#endif
#ifndef RETSIGTYPE
#define RETSIGTYPE void
#endif
#ifndef S_ISREG
# define S_ISREG(mode) (((mode) & S_IFREG) != 0)
#endif
#ifndef S_ISDIR
# define S_ISDIR(mode) (((mode) & S_IFDIR) != 0)
#endif
/* externs from udp_io.c */
extern int _x_udp(int *port);
extern int _x_adr(char *host, int port, struct sockaddr_in *his);
extern int _x_select(fd_set *rf, long tt);
/****************************************************************************
* UBUF is the structure of message exchanged between server and clients.
*
* The 'buf' part of the buffer is variable length up to max of 1024.
* The 'key' field is used by the server for sequence identification.
* The 'seq' field is used by the client for sequence identification.
*
* Client's message to server contain a key value that is the same as the
* key value of the previous message received from the server. Similarly,
* the server's message to client contains a seq value that is the same
* as the seq value of the previous message from the client.
*
* The buf field is logically partitioned into two parts by the len field.
* The len field indicate the size of the first part of the buffer starting
* at buf[0]. The rest of the buffer is the second field. In some cases
* both fields can contain information.
*
****************************************************************************/
#define UBUF_HSIZE 12 /* 12 bytes for the header */
#define UBUF_SPACE 1024 /* standard payload. */
#define UBUF_MAXSPACE 4096 /* maximum payload. */
typedef struct UBUF { char cmd; /* message code. */
unsigned char sum; /* message checksum. */
unsigned short key; /* message key. */
unsigned short seq; /* message sequence number. */
unsigned short len; /* number of bytes in buf 1. */
unsigned long pos; /* location in the file. */
char buf[UBUF_MAXSPACE];
} UBUF;
/* definition of cmd */
#define CC_VERSION 0x10 /* return server's version string. */
#define CC_INFO 0x11 /* get server info block */
#define CC_ERR 0x40 /* error response from server. */
#define CC_GET_DIR 0x41 /* get a directory listing. */
#define CC_GET_FILE 0x42 /* get a file. */
#define CC_UP_LOAD 0x43 /* open a file for writing. */
#define CC_INSTALL 0x44 /* close a file opened for writing. */
#define CC_DEL_FILE 0x45 /* delete a file. */
#define CC_DEL_DIR 0x46 /* delete a directory. */
#define CC_GET_PRO 0x47 /* get directory protection. */
#define CC_SET_PRO 0x48 /* set directory protection. */
#define CC_MAKE_DIR 0x49 /* create a directory. */
#define CC_BYE 0x4A /* finish a session. */
#define CC_GRAB_FILE 0x4B /* atomic get+delete a file */
#define CC_GRAB_DONE 0x4C /* atomic get+delete a file done */
#define CC_STAT 0x4D /* get information about file. */
#define CC_RENAME 0x4E /* rename file or directory. */
#define CC_CH_PASSWD 0x4F /* change password */
#define CC_LIMIT 0x80 /* # > 0x7f for future cntrl blk ext. */
/* definition of global bitfield for version information */
/* Global information is also going to be a bit vector */
#define VER_BYTES 1 /* currently only 8 bits or less of info */
#define VER_LOG 0x01 /* does the server do logging */
#define VER_READONLY 0x02 /* is the server in readonly mode */
#define VER_REVNAME 0x04 /* does the server refuse non reversables */
#define VER_PRIVMODE 0x08 /* Is the server being run 'private' mode */
#define VER_THRUPUT 0x10 /* does the server enforce thruput control*/
#define VER_XTRADATA 0x20 /* does the server accept extra packet data? */
/* definition of directory bitfield for directory information */
/* directory information is just going to be a bitfield encoding
* of which protection bits are set/unset
*/
#define PRO_BYTES 1 /* currently only 8 bits or less of info */
#define DIR_OWNER 0x01 /* does caller own directory */
#define DIR_DEL 0x02 /* can files be deleted from this dir */
#define DIR_ADD 0x04 /* can files be added to this dir */
#define DIR_MKDIR 0x08 /* can new subdirectories be created */
#define DIR_PRIV 0x10 /* are files readable by non-owners */
#define DIR_README 0x20 /* does this dir contain an readme file? */
#define DIR_LIST 0x40 /* public can list directory */
#define DIR_RENAME 0x80 /* can files be renamed in this dir */
/****************************************************************************
* RDIRENT is the structure of a directory entry contained in a .FSP_CONTENT
* file. Each entry contains a 4 bytes quantity 'time', a 4 bytes quantity
* 'size', and 1 byte of 'type'. Then followed by x number of bytes of
* 'name'. 'name' is null terminated. Then followed by enough number of
* padding to fill to an 4-byte boundary. At this point, if the next entry
* to follow will spread across 1k boundary, then two possible things will
* happen. 1) if the header fits between this entry and the 1k boundary,
* a complete header will be filled in with a 'type' set to RDTYPE_SKIP.
* And then enough bytes to padd to 1k boundary. 2) if the header does
* not fit, then simply pad to the 1k boundary. This will make sure that
* messages carrying directory information carry only complete directory
* entries and no fragmented entries. The last entry is type RDTYPE_END.
****************************************************************************/
#define RDHSIZE (2*sizeof(unsigned long)+sizeof(unsigned char))
typedef struct RDIRENT { unsigned long time;
unsigned long size;
unsigned char type;
char name[1]; } RDIRENT;
#define RDTYPE_END 0x00
#define RDTYPE_FILE 0x01
#define RDTYPE_DIR 0x02
#define RDTYPE_LINK 0x03
#define RDTYPE_SKIP 0x2A
#define NULLP ((char *) 0)
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