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92a7d254 IJ |
1 | |
2 | #ifndef TRANSFORM_COMMON_H | |
3 | #define TRANSFORM_COMMON_H | |
4 | ||
5b5f297f IJ |
5 | #include "magic.h" |
6 | ||
92a7d254 IJ |
7 | #define KEYED_CHECK do{ \ |
8 | if (!ti->keyed) { \ | |
9 | *errmsg="transform unkeyed"; \ | |
10 | return 1; \ | |
11 | } \ | |
12 | }while(0) | |
13 | ||
14 | #define SEQNUM_CHECK(seqnum, max_skew) do{ \ | |
15 | uint32_t skew=seqnum-ti->lastrecvseq; \ | |
16 | if (skew<0x8fffffff) { \ | |
17 | /* Ok */ \ | |
18 | ti->lastrecvseq=seqnum; \ | |
19 | } else if ((0-skew)<max_skew) { \ | |
20 | /* Ok */ \ | |
21 | } else { \ | |
22 | /* Too much skew */ \ | |
23 | *errmsg="seqnum: too much skew"; \ | |
24 | return 2; \ | |
25 | } \ | |
26 | }while(0) | |
27 | ||
28 | #define TRANSFORM_VALID \ | |
29 | static bool_t transform_valid(void *sst) \ | |
30 | { \ | |
31 | struct transform_inst *ti=sst; \ | |
32 | \ | |
33 | return ti->keyed; \ | |
34 | } | |
35 | ||
36 | #define TRANSFORM_DESTROY \ | |
37 | static void transform_destroy(void *sst) \ | |
38 | { \ | |
39 | struct transform_inst *st=sst; \ | |
40 | \ | |
41 | FILLZERO(*st); /* Destroy key material */ \ | |
42 | free(st); \ | |
43 | } | |
44 | ||
5b5f297f IJ |
45 | #define SET_CAPAB_TRANSFORMNUM(def) do{ \ |
46 | st->ops.capab_transformnum=dict_read_number(dict, "capab-num", \ | |
47 | False, "transform", loc, def); \ | |
48 | if (st->ops.capab_transformnum > CAPAB_TRANSFORMNUM_MAX) \ | |
49 | cfgfatal(loc,"transform","capab-num out of range 0..%d\n", \ | |
50 | CAPAB_TRANSFORMNUM_MAX); \ | |
51 | }while(0) | |
52 | ||
92a7d254 IJ |
53 | #define TRANSFORM_CREATE_CORE \ |
54 | struct transform_inst *ti; \ | |
55 | ti=safe_malloc(sizeof(*ti),"transform_create"); \ | |
56 | /* mlock XXX */ \ | |
57 | ti->ops.st=ti; \ | |
58 | ti->ops.setkey=transform_setkey; \ | |
59 | ti->ops.valid=transform_valid; \ | |
60 | ti->ops.delkey=transform_delkey; \ | |
61 | ti->ops.forwards=transform_forward; \ | |
62 | ti->ops.reverse=transform_reverse; \ | |
63 | ti->ops.destroy=transform_destroy; \ | |
64 | ti->keyed=False; | |
65 | ||
66 | #endif /*TRANSFORM_COMMON_H*/ |