~mdw / secnet / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 35d30aa3 IJ |
14 | #define SEQNUM_CHECK(seqnum, p) do{ \ |
| 15 | uint32_t skew=seqnum-ti->lastrecvseq; \ | |
| 16 | if (skew<0x8fffffff) { \ | |
| 17 | /* Ok */ \ | |
| 18 | ti->lastrecvseq=seqnum; \ | |
| 19 | } else if ((0-skew)<(p)->max_seq_skew) { \ | |
| 20 | /* Ok */ \ | |
| 21 | } else { \ | |
| 22 | /* Too much skew */ \ | |
| 23 | *errmsg="seqnum: too much skew"; \ | |
| 24 | return 2; \ | |
| 25 | } \ | |
| 92a7d254 IJ |
26 | }while(0) |
| 27 | ||
| 35d30aa3 IJ |
28 | #define SEQNUM_KEYED_FIELDS \ |
| 29 | uint32_t sendseq; \ | |
| 30 | uint32_t lastrecvseq; \ | |
| 31 | bool_t keyed | |
| 32 | ||
| 33 | #define SEQNUM_KEYED_INIT(initlastrecvseq,initsendseq) \ | |
| 34 | (ti->lastrecvseq=(initlastrecvseq), \ | |
| 35 | ti->sendseq=(initsendseq), \ | |
| 36 | ti->keyed=True) | |
| 37 | ||
| 92a7d254 IJ |
38 | #define TRANSFORM_VALID \ |
| 39 | static bool_t transform_valid(void *sst) \ | |
| 40 | { \ | |
| 41 | struct transform_inst *ti=sst; \ | |
| 42 | \ | |
| 43 | return ti->keyed; \ | |
| 44 | } | |
| 45 | ||
| 46 | #define TRANSFORM_DESTROY \ | |
| 47 | static void transform_destroy(void *sst) \ | |
| 48 | { \ | |
| 49 | struct transform_inst *st=sst; \ | |
| 50 | \ | |
| 51 | FILLZERO(*st); /* Destroy key material */ \ | |
| 52 | free(st); \ | |
| 53 | } | |
| 54 | ||
| 5b5f297f IJ |
55 | #define SET_CAPAB_TRANSFORMNUM(def) do{ \ |
| 56 | st->ops.capab_transformnum=dict_read_number(dict, "capab-num", \ | |
| 35d30aa3 | 57 | False, "transform", loc, (def)); \ |
| 5b5f297f IJ |
58 | if (st->ops.capab_transformnum > CAPAB_TRANSFORMNUM_MAX) \ |
| 59 | cfgfatal(loc,"transform","capab-num out of range 0..%d\n", \ | |
| 60 | CAPAB_TRANSFORMNUM_MAX); \ | |
| 61 | }while(0) | |
| 62 | ||
| 92a7d254 IJ |
63 | #define TRANSFORM_CREATE_CORE \ |
| 64 | struct transform_inst *ti; \ | |
| 65 | ti=safe_malloc(sizeof(*ti),"transform_create"); \ | |
| 66 | /* mlock XXX */ \ | |
| 67 | ti->ops.st=ti; \ | |
| 68 | ti->ops.setkey=transform_setkey; \ | |
| 69 | ti->ops.valid=transform_valid; \ | |
| 70 | ti->ops.delkey=transform_delkey; \ | |
| 71 | ti->ops.forwards=transform_forward; \ | |
| 72 | ti->ops.reverse=transform_reverse; \ | |
| 73 | ti->ops.destroy=transform_destroy; \ | |
| 74 | ti->keyed=False; | |
| 75 | ||
| 35d30aa3 IJ |
76 | #define SEQNUM_PARAMS_FIELDS \ |
| 77 | uint32_t max_seq_skew | |
| 78 | ||
| 79 | #define SEQNUM_PARAMS_INIT(dict,p,desc,loc) \ | |
| 80 | (p)->max_seq_skew=dict_read_number((dict), "max-sequence-skew", \ | |
| 81 | False, (desc), (loc), 10); | |
| 82 | ||
| 83 | ||
| 92a7d254 | 84 | #endif /*TRANSFORM_COMMON_H*/ |