2 * $Id: pack.c,v 1.6 2009-10-13 22:55:37 didg 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(DB *dbp _U_, const DBT *pkey _U_, const DBT *pdata, DBT *skey)
56 memset(skey, 0, sizeof(DBT));
57 skey->data = (char *)pdata->data + CNID_DID_OFS;
58 /* FIXME: At least DB 4.0.14 and 4.1.25 pass in the correct length of
59 pdata.size. strlen is therefore not needed. Also, skey should be zeroed
61 len = strlen((char *)skey->data + CNID_DID_LEN);
62 skey->size = CNID_DID_LEN + len + 1;
67 int devino(DB *dbp _U_, const DBT *pkey _U_, const DBT *pdata, DBT *skey)
69 memset(skey, 0, sizeof(DBT));
70 skey->data = (char *)pdata->data + CNID_DEVINO_OFS;
71 skey->size = CNID_DEVINO_LEN;
75 /* The equivalent to make_cnid_data in the cnid library. Non re-entrant. We
76 differ from make_cnid_data in that we never return NULL, rqst->name cannot
77 ever cause start[] to overflow because name length is checked in libatalk. */
79 unsigned char *pack_cnid_data(struct cnid_dbd_rqst *rqst)
81 static unsigned char start[CNID_HEADER_LEN + MAXPATHLEN + 1];
82 unsigned char *buf = start +CNID_LEN;
85 pack_devino(buf, rqst->dev, rqst->ino);
86 buf += CNID_DEVINO_LEN;
88 i = htonl(rqst->type);
89 memcpy(buf, &i, sizeof(i));
92 /* did is already in network byte order */
93 buf = memcpy(buf, &rqst->did, sizeof(rqst->did));
94 buf += sizeof(rqst->did);
95 buf = memcpy(buf, rqst->name, rqst->namelen);
96 *(buf + rqst->namelen) = '\0';