projects / packages / kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 70c2972b SZ |
1 | --- linux/include/linux/ppp-comp.h.orig Fri Aug 6 10:44:11 1999 |
| 2 | +++ linux/include/linux/ppp-comp.h Mon Mar 25 09:11:33 2002 | |
| 3 | @@ -187,6 +187,100 @@ | |
| 4 | #define DEFLATE_CHK_SEQUENCE 0 | |
| 5 | ||
| 6 | /* | |
| 7 | + * Definitions for MPPE. | |
| 8 | + */ | |
| 9 | + | |
| 10 | +#define CI_MPPE 18 /* config option for MPPE */ | |
| 11 | +#define CILEN_MPPE 6 /* length of config option */ | |
| 12 | + | |
| 13 | +#define MPPE_PAD 4 /* MPPE growth per frame */ | |
| 14 | +#define MPPE_MAX_KEY_LEN 16 /* largest key length (128-bit) */ | |
| 15 | + | |
| 16 | +/* option bits for ccp_options.mppe */ | |
| 17 | +#define MPPE_OPT_40 0x01 /* 40 bit */ | |
| 18 | +#define MPPE_OPT_128 0x02 /* 128 bit */ | |
| 19 | +#define MPPE_OPT_STATEFUL 0x04 /* stateful mode */ | |
| 20 | +/* unsupported opts */ | |
| 21 | +#define MPPE_OPT_56 0x08 /* 56 bit */ | |
| 22 | +#define MPPE_OPT_MPPC 0x10 /* MPPC compression */ | |
| 23 | +#define MPPE_OPT_D 0x20 /* Unknown */ | |
| 24 | +#define MPPE_OPT_UNSUPPORTED (MPPE_OPT_56|MPPE_OPT_MPPC|MPPE_OPT_D) | |
| 25 | +#define MPPE_OPT_UNKNOWN 0x40 /* Bits !defined in RFC 3078 were set */ | |
| 26 | + | |
| 27 | +/* | |
| 28 | + * This is not nice ... the alternative is a bitfield struct though. | |
| 29 | + * And unfortunately, we cannot share the same bits for the option | |
| 30 | + * names above since C and H are the same bit. We could do a u_int32 | |
| 31 | + * but then we have to do a htonl() all the time and/or we still need | |
| 32 | + * to know which octet is which. | |
| 33 | + */ | |
| 34 | +#define MPPE_C_BIT 0x01 /* MPPC */ | |
| 35 | +#define MPPE_D_BIT 0x10 /* Obsolete, usage unknown */ | |
| 36 | +#define MPPE_L_BIT 0x20 /* 40-bit */ | |
| 37 | +#define MPPE_S_BIT 0x40 /* 128-bit */ | |
| 38 | +#define MPPE_M_BIT 0x80 /* 56-bit, not supported */ | |
| 39 | +#define MPPE_H_BIT 0x01 /* Stateless (in a different byte) */ | |
| 40 | + | |
| 41 | +/* Does not include H bit; used for least significant octet only. */ | |
| 42 | +#define MPPE_ALL_BITS (MPPE_D_BIT|MPPE_L_BIT|MPPE_S_BIT|MPPE_M_BIT|MPPE_H_BIT) | |
| 43 | + | |
| 44 | +/* Build a CI from mppe opts (see RFC 3078) */ | |
| 45 | +#define MPPE_OPTS_TO_CI(opts, ci) \ | |
| 46 | + do { \ | |
| 47 | + u_char *ptr = ci; /* u_char[4] */ \ | |
| 48 | + \ | |
| 49 | + /* H bit */ \ | |
| 50 | + if (opts & MPPE_OPT_STATEFUL) \ | |
| 51 | + *ptr++ = 0x0; \ | |
| 52 | + else \ | |
| 53 | + *ptr++ = MPPE_H_BIT; \ | |
| 54 | + *ptr++ = 0; \ | |
| 55 | + *ptr++ = 0; \ | |
| 56 | + \ | |
| 57 | + /* S,L bits */ \ | |
| 58 | + *ptr = 0; \ | |
| 59 | + if (opts & MPPE_OPT_128) \ | |
| 60 | + *ptr |= MPPE_S_BIT; \ | |
| 61 | + if (opts & MPPE_OPT_40) \ | |
| 62 | + *ptr |= MPPE_L_BIT; \ | |
| 63 | + /* M,D,C bits not supported */ \ | |
| 64 | + } while (/* CONSTCOND */ 0) | |
| 65 | + | |
| 66 | +/* The reverse of the above */ | |
| 67 | +#define MPPE_CI_TO_OPTS(ci, opts) \ | |
| 68 | + do { \ | |
| 69 | + u_char *ptr = ci; /* u_char[4] */ \ | |
| 70 | + \ | |
| 71 | + opts = 0; \ | |
| 72 | + \ | |
| 73 | + /* H bit */ \ | |
| 74 | + if (!(ptr[0] & MPPE_H_BIT)) \ | |
| 75 | + opts |= MPPE_OPT_STATEFUL; \ | |
| 76 | + \ | |
| 77 | + /* S,L bits */ \ | |
| 78 | + if (ptr[3] & MPPE_S_BIT) \ | |
| 79 | + opts |= MPPE_OPT_128; \ | |
| 80 | + if (ptr[3] & MPPE_L_BIT) \ | |
| 81 | + opts |= MPPE_OPT_40; \ | |
| 82 | + \ | |
| 83 | + /* M,D,C bits */ \ | |
| 84 | + if (ptr[3] & MPPE_M_BIT) \ | |
| 85 | + opts |= MPPE_OPT_56; \ | |
| 86 | + if (ptr[3] & MPPE_D_BIT) \ | |
| 87 | + opts |= MPPE_OPT_D; \ | |
| 88 | + if (ptr[3] & MPPE_C_BIT) \ | |
| 89 | + opts |= MPPE_OPT_MPPC; \ | |
| 90 | + \ | |
| 91 | + /* Other bits */ \ | |
| 92 | + if (ptr[0] & ~MPPE_H_BIT) \ | |
| 93 | + opts |= MPPE_OPT_UNKNOWN; \ | |
| 94 | + if (ptr[1] || ptr[2]) \ | |
| 95 | + opts |= MPPE_OPT_UNKNOWN; \ | |
| 96 | + if (ptr[3] & ~MPPE_ALL_BITS) \ | |
| 97 | + opts |= MPPE_OPT_UNKNOWN; \ | |
| 98 | + } while (/* CONSTCOND */ 0) | |
| 99 | + | |
| 100 | +/* | |
| 101 | * Definitions for other, as yet unsupported, compression methods. | |
| 102 | */ | |
| 103 |