2 * $Id: pack.c,v 1.5 2009-05-04 09:09:43 franklahm Exp $
4 * Copyright (C) Joerg Lenneis 2003
5 * All Rights Reserved. See COPYING.
10 #endif /* HAVE_CONFIG_H */
12 #include <netatalk/endian.h>
15 #ifdef HAVE_SYS_TYPES_H
16 #include <sys/types.h>
17 #endif /* HAVE_SYS_TYPES_H */
18 #include <sys/param.h>
19 #include <sys/cdefs.h>
22 #include <atalk/cnid_dbd_private.h>
27 * This implementation is portable, but could probably be faster by using htonl
28 * where appropriate. Also, this again doubles code from the cdb backend.
30 static void pack_devino(unsigned char *buf, dev_t dev, ino_t ino)
32 buf[CNID_DEV_LEN - 1] = dev; dev >>= 8;
33 buf[CNID_DEV_LEN - 2] = dev; dev >>= 8;
34 buf[CNID_DEV_LEN - 3] = dev; dev >>= 8;
35 buf[CNID_DEV_LEN - 4] = dev; dev >>= 8;
36 buf[CNID_DEV_LEN - 5] = dev; dev >>= 8;
37 buf[CNID_DEV_LEN - 6] = dev; dev >>= 8;
38 buf[CNID_DEV_LEN - 7] = dev; dev >>= 8;
39 buf[CNID_DEV_LEN - 8] = dev;
41 buf[CNID_DEV_LEN + CNID_INO_LEN - 1] = ino; ino >>= 8;
42 buf[CNID_DEV_LEN + CNID_INO_LEN - 2] = ino; ino >>= 8;
43 buf[CNID_DEV_LEN + CNID_INO_LEN - 3] = ino; ino >>= 8;
44 buf[CNID_DEV_LEN + CNID_INO_LEN - 4] = ino; ino >>= 8;
45 buf[CNID_DEV_LEN + CNID_INO_LEN - 5] = ino; ino >>= 8;
46 buf[CNID_DEV_LEN + CNID_INO_LEN - 6] = ino; ino >>= 8;
47 buf[CNID_DEV_LEN + CNID_INO_LEN - 7] = ino; ino >>= 8;
48 buf[CNID_DEV_LEN + CNID_INO_LEN - 8] = ino;
52 int didname(dbp, pkey, pdata, skey)
54 const DBT *pkey _U_, *pdata;
59 memset(skey, 0, sizeof(DBT));
60 skey->data = (char *)pdata->data + CNID_DID_OFS;
61 /* FIXME: At least DB 4.0.14 and 4.1.25 pass in the correct length of
62 pdata.size. strlen is therefore not needed. Also, skey should be zeroed
64 len = strlen((char *)skey->data + CNID_DID_LEN);
65 skey->size = CNID_DID_LEN + len + 1;
70 int devino(dbp, pkey, pdata, skey)
72 const DBT *pkey _U_, *pdata;
75 memset(skey, 0, sizeof(DBT));
76 skey->data = (char *)pdata->data + CNID_DEVINO_OFS;
77 skey->size = CNID_DEVINO_LEN;
81 /* The equivalent to make_cnid_data in the cnid library. Non re-entrant. We
82 differ from make_cnid_data in that we never return NULL, rqst->name cannot
83 ever cause start[] to overflow because name length is checked in libatalk. */
85 unsigned char *pack_cnid_data(struct cnid_dbd_rqst *rqst)
87 static unsigned char start[CNID_HEADER_LEN + MAXPATHLEN + 1];
88 unsigned char *buf = start +CNID_LEN;
91 pack_devino(buf, rqst->dev, rqst->ino);
92 buf += CNID_DEVINO_LEN;
94 i = htonl(rqst->type);
95 memcpy(buf, &i, sizeof(i));
98 /* did is already in network byte order */
99 buf = memcpy(buf, &rqst->did, sizeof(rqst->did));
100 buf += sizeof(rqst->did);
101 buf = memcpy(buf, rqst->name, rqst->namelen);
102 *(buf + rqst->namelen) = '\0';