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- /*********************************************************************\
- * 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. *
- \*********************************************************************/
-
- #include <stdio.h>
- #include <sys/param.h>
- #include <sys/types.h>
- #include <errno.h>
- #include <sys/socket.h>
- #include <netinet/in.h>
- #include <sys/stat.h>
- #include <sys/time.h>
- #include <fcntl.h>
- #include <signal.h>
-
- #ifdef DIRENT
- #include <dirent.h>
- #else
- #include <sys/dir.h>
- #endif
-
- /****************************************************************************
- * UBUF is the structure of message exchanged between server and clients.
- *
- * The 'buf' part of the buffer is variable lenght 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 /* 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_SPACE];
- } UBUF;
-
- /* definition of cmd */
-
- #define CC_VERSION 0x10 /* return server's version string. */
- #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_LIMIT 0x80 /* # > 0x7f for future cntrl blk ext. */
-
- /****************************************************************************
- * 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 quentity
- * '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_SKIP 0x2A
-
- #define NULLP ((char *) 0)
-