mirror of
https://github.com/0intro/wmii
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300 lines
9.1 KiB
C
300 lines
9.1 KiB
C
/*
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*(C)opyright MMIV-MMVI Anselm R. Garbe <garbeam at gmail dot com>
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*See LICENSE file for license details.
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*/
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#include <sys/types.h>
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#ifndef nil
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#define nil 0
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#endif
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#define IXP_VERSION "9P2000"
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#define IXP_MAX_VERSION 32
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#define IXP_MAX_ERROR 128
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#define IXP_MAX_CACHE 32
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#define IXP_MAX_MSG 8192
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#define IXP_MAX_FLEN 128
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#define IXP_MAX_ULEN 32
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#define IXP_MAX_STAT 64
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#define IXP_MAX_WELEM 16 /*MAXWELEM */
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#define IXP_MAX_TFUNCS 14
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/*
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size[4] Tversion tag[2] msize[4] version[s]
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size[4] Rversion tag[2] msize[4] version[s]
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size[4] Tauth tag[2] afid[4] uname[s] aname[s]
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size[4] Rauth tag[2] aqid[13]
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size[4] Rerror tag[2] ename[s]
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size[4] Tflush tag[2] oldtag[2]
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size[4] Rflush tag[2]
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size[4] Tattach tag[2] fid[4] afid[4] uname[s] aname[s]
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size[4] Rattach tag[2] qid[13]
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size[4] Twalk tag[2] fid[4] newfid[4] nwname[2] nwname*(wname[s])
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size[4] Rwalk tag[2] nwqid[2] nwqid*(wqid[13])
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size[4] Topen tag[2] fid[4] mode[1]
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size[4] Ropen tag[2] qid[13] iounit[4]
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size[4] Tcreate tag[2] fid[4] name[s] perm[4] mode[1]
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size[4] Rcreate tag[2] qid[13] iounit[4]
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size[4] Tread tag[2] fid[4] offset[8] count[4]
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size[4] Rread tag[2] count[4] data[count]
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size[4] Twrite tag[2] fid[4] offset[8] count[4] data[count]
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size[4] Rwrite tag[2] count[4]
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size[4] Tclunk tag[2] fid[4]
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size[4] Rclunk tag[2]
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size[4] Tremove tag[2] fid[4]
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size[4] Rremove tag[2]
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size[4] Tstat tag[2] fid[4]
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size[4] Rstat tag[2] stat[n]
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size[4] Twstat tag[2] fid[4] stat[n]
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size[4] Rwstat tag[2]
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stat[n]:
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size[2] total byte count of the following data
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type[2] for kernel use
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dev[4] for kernel use
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qid.type[1] the type of the file (directory, etc.),
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represented as a bit vector corresponding to the high 8 bits of the file's mode word.
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qid.vers[4] version number for given path
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qid.path[8] the file server's unique identification for the file
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mode[4] permissions and flags
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atime[4] last access time
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mtime[4] last modification time
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length[8] length of file in bytes
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name[ s ] file name; must be / if the file is the root directory of the server
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uid[ s ] owner name
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gid[ s ] group name
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muid[ s ]
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*/
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/*9P message types */
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enum {
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TVERSION = 100,
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RVERSION,
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TAUTH = 102,
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RAUTH,
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TATTACH = 104,
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RATTACH,
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TERROR = 106,
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RERROR,
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TFLUSH = 108,
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RFLUSH,
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TWALK = 110,
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RWALK,
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TOPEN = 112,
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ROPEN,
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TCREATE = 114,
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RCREATE,
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TREAD = 116,
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RREAD,
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TWRITE = 118,
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RWRITE,
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TCLUNK = 120,
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RCLUNK,
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TREMOVE = 122,
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RREMOVE,
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TSTAT = 124,
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RSTAT,
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TWSTAT = 126,
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RWSTAT,
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};
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/*borrowed from libc.h of Plan 9 */
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#define DMDIR 0x80000000 /*mode bit for directories */
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#define DMAPPEND 0x40000000 /*mode bit for append only files */
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#define DMEXCL 0x20000000 /*mode bit for exclusive use files */
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#define DMMOUNT 0x10000000 /*mode bit for mounted channel */
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#define DMAUTH 0x08000000 /*mode bit for authentication file */
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#define DMTMP 0x04000000 /*mode bit for non-backed-up file */
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#define DMREAD 0x4<<6 /*mode bit for read permission */
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#define DMWRITE 0x2<<6 /*mode bit for write permission */
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#define DMEXEC 0x1<<6 /*mode bit for execute permission */
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/*modes */
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enum {
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IXP_OREAD = 0x00,
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IXP_OWRITE = 0x01,
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IXP_ORDWR = 0x02,
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IXP_OEXEC = 0x03,
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IXP_OEXCL = 0x04,
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IXP_OTRUNC = 0x10,
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IXP_OREXEC = 0x20,
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IXP_ORCLOSE = 0x40,
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IXP_OAPPEND = 0x80,
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};
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/*qid.types */
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enum {
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IXP_QTDIR = 0x80,
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IXP_QTAPPEND = 0x40,
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IXP_QTEXCL = 0x20,
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IXP_QTMOUNT = 0x10,
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IXP_QTAUTH = 0x08,
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IXP_QTTMP = 0x04,
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IXP_QTSYMLINK = 0x02,
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IXP_QTLINK = 0x01,
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IXP_QTFILE = 0x00,
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};
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#define IXP_NOTAG (unsigned short)~0U /*Dummy tag */
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#define IXP_NOFID (unsigned int)~0 /*No auth */
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typedef struct Qid Qid;
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struct Qid {
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unsigned char type;
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unsigned int version;
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unsigned long long path;
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/* internal use only */
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unsigned char dir_type;
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};
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/*stat structure */
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typedef struct {
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unsigned short type;
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unsigned int dev;
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Qid qid;
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unsigned int mode;
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unsigned int atime;
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unsigned int mtime;
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unsigned long long length;
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char name[IXP_MAX_FLEN];
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char uid[IXP_MAX_ULEN];
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char gid[IXP_MAX_ULEN];
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char muid[IXP_MAX_ULEN];
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} Stat;
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typedef struct {
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unsigned char id;
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unsigned short tag;
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unsigned int fid;
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unsigned int maxmsg; /*Tversion, Rversion */
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char version[IXP_MAX_VERSION]; /*Tversion, Rversion */
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unsigned short oldtag; /*Tflush */
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char errstr[IXP_MAX_ERROR]; /*Rerror */
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Qid qid; /*Rattach, Ropen, Rcreate */
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unsigned int iounit; /*Ropen, Rcreate */
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Qid aqid; /*Rauth */
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unsigned int afid; /*Tauth, Tattach */
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char uname[IXP_MAX_ULEN]; /*Tauth, Tattach */
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char aname[IXP_MAX_FLEN]; /*Tauth, Tattach */
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unsigned int perm; /*Tcreate */
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char name[IXP_MAX_FLEN]; /*Tcreate */
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unsigned char mode; /*Tcreate, Topen */
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unsigned int newfid; /*Twalk */
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unsigned short nwname; /*Twalk */
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char wname[IXP_MAX_WELEM][IXP_MAX_FLEN]; /*Twalk */
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unsigned short nwqid; /*Rwalk */
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Qid wqid[IXP_MAX_WELEM]; /*Rwalk */
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unsigned long long offset; /*Tread, Twrite */
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unsigned int count; /*Tread, Twrite, Rread */
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Stat stat; /*Rstat */
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unsigned short nstat; /*Twstat, Rstat */
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unsigned char data[IXP_MAX_MSG]; /*Twrite, Rread, Twstat, *Rstat */
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} Fcall;
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typedef struct IXPServer IXPServer;
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typedef struct IXPConn IXPConn;
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typedef struct IXPMap IXPMap;
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struct IXPMap {
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unsigned int fid;
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Qid qid;
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};
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struct IXPConn {
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int fd;
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IXPServer *srv;
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void (*read) (IXPConn *);
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void (*close) (IXPConn *);
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IXPMap **map;
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size_t mapsz;
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Fcall pending;
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int is_pending;
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};
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struct IXPServer {
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int running;
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IXPConn **conn;
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size_t connsz;
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int maxfd;
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fd_set rd;
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};
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typedef struct {
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int fd;
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unsigned int root_fid;
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Qid root_qid;
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Fcall fcall;
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char *errstr;
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} IXPClient;
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/* client.c */
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int ixp_client_dial(IXPClient *c, char *address, unsigned int rootfid);
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void ixp_client_hangup(IXPClient *c);
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int ixp_client_remove(IXPClient *c, unsigned int newfid, char *filepath);
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int ixp_client_create(IXPClient *c, unsigned int dirfid, char *name,
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unsigned int perm, unsigned char mode);
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int ixp_client_walk(IXPClient *c, unsigned int newfid, char *filepath);
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int ixp_client_open(IXPClient *c, unsigned int newfid, char *filepath,
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unsigned char mode);
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int ixp_client_read(IXPClient *c, unsigned int fid,
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unsigned long long offset, void *result,
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unsigned int res_len);
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int ixp_client_write(IXPClient *c, unsigned int fid,
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unsigned long long offset,
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unsigned int count, unsigned char *data);
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int ixp_client_close(IXPClient *c, unsigned int fid);
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int ixp_client_do_fcall(IXPClient * c);
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/* convert.c */
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void *ixp_enc_u8(unsigned char *msg, unsigned char val);
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void *ixp_dec_u8(unsigned char *msg, unsigned char *val);
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void *ixp_enc_u16(unsigned char *msg, unsigned short val);
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void *ixp_dec_u16(unsigned char *msg, unsigned short *val);
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void *ixp_enc_u32(unsigned char *msg, unsigned int val);
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void *ixp_dec_u32(unsigned char *msg, unsigned int *val);
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void *ixp_enc_u64(unsigned char *msg, unsigned long long val);
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void *ixp_dec_u64(unsigned char *msg, unsigned long long *val);
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void *ixp_enc_string(unsigned char *msg, const char *s);
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void *ixp_dec_string(unsigned char *msg, char *string,
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unsigned short stringlen, unsigned short *len);
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void *ixp_enc_data(unsigned char *msg, unsigned char *data,
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unsigned int datalen);
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void *ixp_dec_data(unsigned char *msg, unsigned char *data,
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unsigned int datalen);
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void *ixp_enc_prefix(unsigned char *msg, unsigned int size,
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unsigned char id, unsigned short tag);
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void *ixp_dec_prefix(unsigned char *msg, unsigned int *size,
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unsigned char *id, unsigned short *tag);
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void *ixp_enc_qid(unsigned char *msg, Qid *qid);
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void *ixp_dec_qid(unsigned char *msg, Qid *qid);
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void *ixp_enc_stat(unsigned char *msg, Stat *stat);
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void *ixp_dec_stat(unsigned char *msg, Stat *stat);
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/* message.c */
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unsigned short ixp_sizeof_stat(Stat *stat);
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unsigned int ixp_fcall_to_msg(void *msg, Fcall *fcall, unsigned int msglen);
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unsigned int ixp_msg_to_fcall(Fcall *call, void *msg, unsigned int msglen);
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/* server.c */
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IXPConn *ixp_server_open_conn(IXPServer *s, int fd,
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void (*read)(IXPConn *c), void (*close)(IXPConn *c));
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void ixp_server_close_conn(IXPConn *c);
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char *ixp_server_loop(IXPServer *s);
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IXPMap *ixp_server_fid2map(IXPConn *c, unsigned int fid);
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unsigned int ixp_server_receive_fcall(IXPConn *c, Fcall *fcall);
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int ixp_server_respond_fcall(IXPConn *c, Fcall *fcall);
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int ixp_server_respond_error(IXPConn *c, Fcall *fcall, char *errstr);
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void ixp_server_close(IXPServer *s);
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/* socket.c */
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int ixp_connect_sock(char *address);
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int ixp_accept_sock(int fd);
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int ixp_create_sock(char *address, char **errstr);
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/* transport.c */
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unsigned int ixp_send_message(int fd, void *msg, unsigned int msize, char **errstr);
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unsigned int ixp_recv_message(int fd, void *msg, unsigned int msglen, char **errstr);
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