diff options
Diffstat (limited to 'package/network/services/ppp/patches/201-mppe_mppc_1.1.patch')
| -rw-r--r-- | package/network/services/ppp/patches/201-mppe_mppc_1.1.patch | 1495 |
1 files changed, 1495 insertions, 0 deletions
diff --git a/package/network/services/ppp/patches/201-mppe_mppc_1.1.patch b/package/network/services/ppp/patches/201-mppe_mppc_1.1.patch new file mode 100644 index 0000000..0bc42d4 --- /dev/null +++ b/package/network/services/ppp/patches/201-mppe_mppc_1.1.patch @@ -0,0 +1,1495 @@ +pppd: add support for MPPE and MPPC encryption and compression protocols + +This is a forward ported version of ppp-2.4.3-mppe-mppc-1.1.patch.gz found on +http://mppe-mppc.alphacron.de/ . + +Signed-off-by: Jo-Philipp Wich <jow@openwrt.org> + +--- a/include/linux/ppp-comp.h ++++ b/include/linux/ppp-comp.h +@@ -36,7 +36,7 @@ + */ + + /* +- * ==FILEVERSION 20020319== ++ * ==FILEVERSION 20020715== + * + * NOTE TO MAINTAINERS: + * If you modify this file at all, please set the above date. +@@ -201,6 +201,33 @@ struct compressor { + #define CI_MPPE 18 /* config option for MPPE */ + #define CILEN_MPPE 6 /* length of config option */ + ++/* MPPE/MPPC definitions by J.D.*/ ++#define MPPE_STATELESS MPPE_H_BIT /* configuration bit H */ ++#define MPPE_40BIT MPPE_L_BIT /* configuration bit L */ ++#define MPPE_56BIT MPPE_M_BIT /* configuration bit M */ ++#define MPPE_128BIT MPPE_S_BIT /* configuration bit S */ ++#define MPPE_MPPC MPPE_C_BIT /* configuration bit C */ ++ ++/* ++ * Definitions for Stac LZS. ++ */ ++ ++#define CI_LZS 17 /* config option for Stac LZS */ ++#define CILEN_LZS 5 /* length of config option */ ++ ++#define LZS_OVHD 4 /* max. LZS overhead */ ++#define LZS_HIST_LEN 2048 /* LZS history size */ ++#define LZS_MAX_CCOUNT 0x0FFF /* max. coherency counter value */ ++ ++#define LZS_MODE_NONE 0 ++#define LZS_MODE_LCB 1 ++#define LZS_MODE_CRC 2 ++#define LZS_MODE_SEQ 3 ++#define LZS_MODE_EXT 4 ++ ++#define LZS_EXT_BIT_FLUSHED 0x80 /* bit A */ ++#define LZS_EXT_BIT_COMP 0x20 /* bit C */ ++ + /* + * Definitions for other, as yet unsupported, compression methods. + */ +--- a/include/net/ppp-comp.h ++++ b/include/net/ppp-comp.h +@@ -168,6 +168,33 @@ struct compressor { + #define CI_MPPE 18 /* config option for MPPE */ + #define CILEN_MPPE 6 /* length of config option */ + ++/* MPPE/MPPC definitions by J.D.*/ ++#define MPPE_STATELESS MPPE_H_BIT /* configuration bit H */ ++#define MPPE_40BIT MPPE_L_BIT /* configuration bit L */ ++#define MPPE_56BIT MPPE_M_BIT /* configuration bit M */ ++#define MPPE_128BIT MPPE_S_BIT /* configuration bit S */ ++#define MPPE_MPPC MPPE_C_BIT /* configuration bit C */ ++ ++/* ++ * Definitions for Stac LZS. ++ */ ++ ++#define CI_LZS 17 /* config option for Stac LZS */ ++#define CILEN_LZS 5 /* length of config option */ ++ ++#define LZS_OVHD 4 /* max. LZS overhead */ ++#define LZS_HIST_LEN 2048 /* LZS history size */ ++#define LZS_MAX_CCOUNT 0x0FFF /* max. coherency counter value */ ++ ++#define LZS_MODE_NONE 0 ++#define LZS_MODE_LCB 1 ++#define LZS_MODE_CRC 2 ++#define LZS_MODE_SEQ 3 ++#define LZS_MODE_EXT 4 ++ ++#define LZS_EXT_BIT_FLUSHED 0x80 /* bit A */ ++#define LZS_EXT_BIT_COMP 0x20 /* bit C */ ++ + /* + * Definitions for other, as yet unsupported, compression methods. + */ +--- a/pppd/ccp.c ++++ b/pppd/ccp.c +@@ -62,12 +62,10 @@ static int setdeflate __P((char **)); + static char bsd_value[8]; + static char deflate_value[8]; + +-/* +- * Option variables. +- */ + #ifdef MPPE +-bool refuse_mppe_stateful = 1; /* Allow stateful mode? */ +-#endif ++static int setmppe(char **); ++static int setnomppe(void); ++#endif /* MPPE */ + + static option_t ccp_option_list[] = { + { "noccp", o_bool, &ccp_protent.enabled_flag, +@@ -108,54 +106,36 @@ static option_t ccp_option_list[] = { + "don't allow Predictor-1", OPT_ALIAS | OPT_PRIOSUB | OPT_A2CLR, + &ccp_allowoptions[0].predictor_1 }, + ++ { "lzs", o_bool, &ccp_wantoptions[0].lzs, ++ "request Stac LZS", 1, &ccp_allowoptions[0].lzs, OPT_PRIO }, ++ { "+lzs", o_bool, &ccp_wantoptions[0].lzs, ++ "request Stac LZS", 1, &ccp_allowoptions[0].lzs, OPT_ALIAS | OPT_PRIO }, ++ { "nolzs", o_bool, &ccp_wantoptions[0].lzs, ++ "don't allow Stac LZS", OPT_PRIOSUB | OPT_A2CLR, ++ &ccp_allowoptions[0].lzs }, ++ { "-lzs", o_bool, &ccp_wantoptions[0].lzs, ++ "don't allow Stac LZS", OPT_ALIAS | OPT_PRIOSUB | OPT_A2CLR, ++ &ccp_allowoptions[0].lzs }, ++ + #ifdef MPPE +- /* MPPE options are symmetrical ... we only set wantoptions here */ +- { "require-mppe", o_bool, &ccp_wantoptions[0].mppe, +- "require MPPE encryption", +- OPT_PRIO | MPPE_OPT_40 | MPPE_OPT_128 }, +- { "+mppe", o_bool, &ccp_wantoptions[0].mppe, +- "require MPPE encryption", +- OPT_ALIAS | OPT_PRIO | MPPE_OPT_40 | MPPE_OPT_128 }, +- { "nomppe", o_bool, &ccp_wantoptions[0].mppe, +- "don't allow MPPE encryption", OPT_PRIO }, +- { "-mppe", o_bool, &ccp_wantoptions[0].mppe, +- "don't allow MPPE encryption", OPT_ALIAS | OPT_PRIO }, +- +- /* We use ccp_allowoptions[0].mppe as a junk var ... it is reset later */ +- { "require-mppe-40", o_bool, &ccp_allowoptions[0].mppe, +- "require MPPE 40-bit encryption", OPT_PRIO | OPT_A2OR | MPPE_OPT_40, +- &ccp_wantoptions[0].mppe }, +- { "+mppe-40", o_bool, &ccp_allowoptions[0].mppe, +- "require MPPE 40-bit encryption", OPT_PRIO | OPT_A2OR | MPPE_OPT_40, +- &ccp_wantoptions[0].mppe }, +- { "nomppe-40", o_bool, &ccp_allowoptions[0].mppe, +- "don't allow MPPE 40-bit encryption", +- OPT_PRIOSUB | OPT_A2CLRB | MPPE_OPT_40, &ccp_wantoptions[0].mppe }, +- { "-mppe-40", o_bool, &ccp_allowoptions[0].mppe, +- "don't allow MPPE 40-bit encryption", +- OPT_ALIAS | OPT_PRIOSUB | OPT_A2CLRB | MPPE_OPT_40, +- &ccp_wantoptions[0].mppe }, +- +- { "require-mppe-128", o_bool, &ccp_allowoptions[0].mppe, +- "require MPPE 128-bit encryption", OPT_PRIO | OPT_A2OR | MPPE_OPT_128, +- &ccp_wantoptions[0].mppe }, +- { "+mppe-128", o_bool, &ccp_allowoptions[0].mppe, +- "require MPPE 128-bit encryption", +- OPT_ALIAS | OPT_PRIO | OPT_A2OR | MPPE_OPT_128, +- &ccp_wantoptions[0].mppe }, +- { "nomppe-128", o_bool, &ccp_allowoptions[0].mppe, +- "don't allow MPPE 128-bit encryption", +- OPT_PRIOSUB | OPT_A2CLRB | MPPE_OPT_128, &ccp_wantoptions[0].mppe }, +- { "-mppe-128", o_bool, &ccp_allowoptions[0].mppe, +- "don't allow MPPE 128-bit encryption", +- OPT_ALIAS | OPT_PRIOSUB | OPT_A2CLRB | MPPE_OPT_128, +- &ccp_wantoptions[0].mppe }, +- +- /* strange one; we always request stateless, but will we allow stateful? */ +- { "mppe-stateful", o_bool, &refuse_mppe_stateful, +- "allow MPPE stateful mode", OPT_PRIO }, +- { "nomppe-stateful", o_bool, &refuse_mppe_stateful, +- "disallow MPPE stateful mode", OPT_PRIO | 1 }, ++ { "mppc", o_bool, &ccp_wantoptions[0].mppc, ++ "request MPPC compression", 1, &ccp_allowoptions[0].mppc }, ++ { "+mppc", o_bool, &ccp_wantoptions[0].mppc, ++ "request MPPC compression", 1, &ccp_allowoptions[0].mppc, OPT_ALIAS }, ++ { "nomppc", o_bool, &ccp_wantoptions[0].mppc, ++ "don't allow MPPC compression", OPT_PRIOSUB | OPT_A2CLR, ++ &ccp_allowoptions[0].mppc }, ++ { "-mppc", o_bool, &ccp_wantoptions[0].mppc, ++ "don't allow MPPC compression", OPT_ALIAS | OPT_PRIOSUB | OPT_A2CLR, ++ &ccp_allowoptions[0].mppc }, ++ { "mppe", o_special, (void *)setmppe, ++ "request MPPE encryption" }, ++ { "+mppe", o_special, (void *)setmppe, ++ "request MPPE encryption" }, ++ { "nomppe", o_special_noarg, (void *)setnomppe, ++ "don't allow MPPE encryption" }, ++ { "-mppe", o_special_noarg, (void *)setnomppe, ++ "don't allow MPPE encryption" }, + #endif /* MPPE */ + + { NULL } +@@ -241,7 +221,7 @@ static fsm_callbacks ccp_callbacks = { + */ + #define ANY_COMPRESS(opt) ((opt).deflate || (opt).bsd_compress \ + || (opt).predictor_1 || (opt).predictor_2 \ +- || (opt).mppe) ++ || (opt).lzs || (opt).mppc || (opt).mppe) + + /* + * Local state (mainly for handling reset-reqs and reset-acks). +@@ -344,6 +324,100 @@ setdeflate(argv) + return 1; + } + ++#ifdef MPPE ++/* ++ * Functions called from config options ++ */ ++/* ++ MPPE suboptions: ++ required - require MPPE; disconnect if peer doesn't support it ++ stateless - use stateless mode ++ no40 - disable 40 bit keys ++ no56 - disable 56 bit keys ++ no128 - disable 128 bit keys ++*/ ++int setmppe(char **argv) ++{ ++ int i; ++ char *str, cmdbuf[16]; ++ ++ ccp_allowoptions[0].mppe = 1; ++ ccp_allowoptions[0].mppe_40 = 1; ++ ccp_allowoptions[0].mppe_56 = 1; ++ ccp_allowoptions[0].mppe_128 = 1; ++ ccp_allowoptions[0].mppe_stateless = 0; ++ ccp_wantoptions[0].mppe = 0; ++ ++ str = *argv; ++ ++ while (1) { ++ i = 0; ++ memset(cmdbuf, '\0', 16); ++ while ((i < 16) && (*str != ',') && (*str != '\0')) ++ cmdbuf[i++] = *str++; ++ cmdbuf[i] = '\0'; ++ if (!strncasecmp(cmdbuf, "no40", strlen("no40"))) { ++ ccp_allowoptions[0].mppe_40 = 0; ++ goto next_param; ++ } else if (!strncasecmp(cmdbuf, "no56", strlen("no56"))) { ++ ccp_allowoptions[0].mppe_56 = 0; ++ goto next_param; ++ } else if (!strncasecmp(cmdbuf, "no128", strlen("no128"))) { ++ ccp_allowoptions[0].mppe_128 = 0; ++ goto next_param; ++ } else if (!strncasecmp(cmdbuf, "stateless", strlen("stateless"))) { ++ ccp_allowoptions[0].mppe_stateless = 1; ++ goto next_param; ++ } else if (!strncasecmp(cmdbuf, "required", strlen("required"))) { ++ ccp_wantoptions[0].mppe = 1; ++ goto next_param; ++ } else { ++ option_error("invalid parameter '%s' for mppe option", cmdbuf); ++ return 0; ++ } ++ ++ next_param: ++ if (*str == ',') { ++ str++; ++ continue; ++ } ++ if (*str == '\0') { ++ if (!(ccp_allowoptions[0].mppe_40 || ccp_allowoptions[0].mppe_56 || ++ ccp_allowoptions[0].mppe_128)) { ++ if (ccp_wantoptions[0].mppe == 1) { ++ option_error("You require MPPE but you have switched off " ++ "all encryption key lengths."); ++ return 0; ++ } ++ ccp_wantoptions[0].mppe = ccp_allowoptions[0].mppe = 0; ++ ccp_wantoptions[0].mppe_stateless = ++ ccp_allowoptions[0].mppe_stateless = 0; ++ } else { ++ ccp_allowoptions[0].mppe = 1; ++ ccp_wantoptions[0].mppe_stateless = ++ ccp_allowoptions[0].mppe_stateless; ++ if (ccp_wantoptions[0].mppe == 1) { ++ ccp_wantoptions[0].mppe_40 = ccp_allowoptions[0].mppe_40; ++ ccp_wantoptions[0].mppe_56 = ccp_allowoptions[0].mppe_56; ++ ccp_wantoptions[0].mppe_128 = ccp_allowoptions[0].mppe_128; ++ } ++ } ++ return 1; ++ } ++ } ++} ++ ++int setnomppe(void) ++{ ++ ccp_wantoptions[0].mppe = ccp_allowoptions[0].mppe = 0; ++ ccp_wantoptions[0].mppe_40 = ccp_allowoptions[0].mppe_40 = 0; ++ ccp_wantoptions[0].mppe_56 = ccp_allowoptions[0].mppe_56 = 0; ++ ccp_wantoptions[0].mppe_128 = ccp_allowoptions[0].mppe_128 = 0; ++ ccp_wantoptions[0].mppe_stateless = ccp_allowoptions[0].mppe_stateless = 0; ++ return 1; ++} ++#endif /* MPPE */ ++ + /* + * ccp_init - initialize CCP. + */ +@@ -378,6 +452,30 @@ ccp_init(unit) + ccp_allowoptions[0].bsd_bits = BSD_MAX_BITS; + + ccp_allowoptions[0].predictor_1 = 1; ++ ++ ccp_wantoptions[0].lzs = 0; /* Stac LZS - will be enabled in the future */ ++ ccp_wantoptions[0].lzs_mode = LZS_MODE_SEQ; ++ ccp_wantoptions[0].lzs_hists = 1; ++ ccp_allowoptions[0].lzs = 0; /* Stac LZS - will be enabled in the future */ ++ ccp_allowoptions[0].lzs_mode = LZS_MODE_SEQ; ++ ccp_allowoptions[0].lzs_hists = 1; ++ ++#ifdef MPPE ++ /* by default allow and request MPPC... */ ++ ccp_wantoptions[0].mppc = ccp_allowoptions[0].mppc = 1; ++ ++ /* ... and allow but don't request MPPE */ ++ ccp_allowoptions[0].mppe = 1; ++ ccp_allowoptions[0].mppe_40 = 1; ++ ccp_allowoptions[0].mppe_56 = 1; ++ ccp_allowoptions[0].mppe_128 = 1; ++ ccp_allowoptions[0].mppe_stateless = 1; ++ ccp_wantoptions[0].mppe = 0; ++ ccp_wantoptions[0].mppe_40 = 0; ++ ccp_wantoptions[0].mppe_56 = 0; ++ ccp_wantoptions[0].mppe_128 = 0; ++ ccp_wantoptions[0].mppe_stateless = 0; ++#endif /* MPPE */ + } + + /* +@@ -455,11 +553,11 @@ ccp_input(unit, p, len) + if (oldstate == OPENED && p[0] == TERMREQ && f->state != OPENED) { + notice("Compression disabled by peer."); + #ifdef MPPE +- if (ccp_gotoptions[unit].mppe) { ++ if (ccp_wantoptions[unit].mppe) { + error("MPPE disabled, closing LCP"); + lcp_close(unit, "MPPE disabled by peer"); + } +-#endif ++#endif /* MPPE */ + } + + /* +@@ -487,6 +585,15 @@ ccp_extcode(f, code, id, p, len) + break; + /* send a reset-ack, which the transmitter will see and + reset its compression state. */ ++ ++ /* In case of MPPE/MPPC or LZS we shouldn't send CCP_RESETACK, ++ but we do it in order to reset compressor; CCP_RESETACK is ++ then silently discarded. See functions ppp_send_frame and ++ ppp_ccp_peek in ppp_generic.c (Linux only !!!). All the ++ confusion is caused by the fact that CCP code is splited ++ into two parts - one part is handled by pppd, the other one ++ is handled by kernel. */ ++ + fsm_sdata(f, CCP_RESETACK, id, NULL, 0); + break; + +@@ -515,12 +622,11 @@ ccp_protrej(unit) + fsm_lowerdown(&ccp_fsm[unit]); + + #ifdef MPPE +- if (ccp_gotoptions[unit].mppe) { ++ if (ccp_wantoptions[unit].mppe) { + error("MPPE required but peer negotiation failed"); + lcp_close(unit, "MPPE required but peer negotiation failed"); + } +-#endif +- ++#endif /* MPPE */ + } + + /* +@@ -537,7 +643,7 @@ ccp_resetci(f) + all_rejected[f->unit] = 0; + + #ifdef MPPE +- if (go->mppe) { ++ if (go->mppe || go->mppc) { + ccp_options *ao = &ccp_allowoptions[f->unit]; + int auth_mschap_bits = auth_done[f->unit]; + int numbits; +@@ -551,80 +657,109 @@ ccp_resetci(f) + * NB: If MPPE is required, all other compression opts are invalid. + * So, we return right away if we can't do it. + */ ++ if (ccp_wantoptions[f->unit].mppe) { ++ /* Leave only the mschap auth bits set */ ++ auth_mschap_bits &= (CHAP_MS_WITHPEER | CHAP_MS_PEER | ++ CHAP_MS2_WITHPEER | CHAP_MS2_PEER); ++ /* Count the mschap auths */ ++ auth_mschap_bits >>= CHAP_MS_SHIFT; ++ numbits = 0; ++ do { ++ numbits += auth_mschap_bits & 1; ++ auth_mschap_bits >>= 1; ++ } while (auth_mschap_bits); ++ if (numbits > 1) { ++ error("MPPE required, but auth done in both directions."); ++ lcp_close(f->unit, "MPPE required but not available"); ++ return; ++ } ++ if (!numbits) { ++ error("MPPE required, but MS-CHAP[v2] auth not performed."); ++ lcp_close(f->unit, "MPPE required but not available"); ++ return; ++ } + +- /* Leave only the mschap auth bits set */ +- auth_mschap_bits &= (CHAP_MS_WITHPEER | CHAP_MS_PEER | +- CHAP_MS2_WITHPEER | CHAP_MS2_PEER); +- /* Count the mschap auths */ +- auth_mschap_bits >>= CHAP_MS_SHIFT; +- numbits = 0; +- do { +- numbits += auth_mschap_bits & 1; +- auth_mschap_bits >>= 1; +- } while (auth_mschap_bits); +- if (numbits > 1) { +- error("MPPE required, but auth done in both directions."); +- lcp_close(f->unit, "MPPE required but not available"); +- return; +- } +- if (!numbits) { +- error("MPPE required, but MS-CHAP[v2] auth not performed."); +- lcp_close(f->unit, "MPPE required but not available"); +- return; +- } +- +- /* A plugin (eg radius) may not have obtained key material. */ +- if (!mppe_keys_set) { +- error("MPPE required, but keys are not available. " +- "Possible plugin problem?"); +- lcp_close(f->unit, "MPPE required but not available"); +- return; +- } +- +- /* LM auth not supported for MPPE */ +- if (auth_done[f->unit] & (CHAP_MS_WITHPEER | CHAP_MS_PEER)) { +- /* This might be noise */ +- if (go->mppe & MPPE_OPT_40) { +- notice("Disabling 40-bit MPPE; MS-CHAP LM not supported"); +- go->mppe &= ~MPPE_OPT_40; +- ccp_wantoptions[f->unit].mppe &= ~MPPE_OPT_40; ++ /* A plugin (eg radius) may not have obtained key material. */ ++ if (!mppe_keys_set) { ++ error("MPPE required, but keys are not available. " ++ "Possible plugin problem?"); ++ lcp_close(f->unit, "MPPE required but not available"); ++ return; + } + } + +- /* Last check: can we actually negotiate something? */ +- if (!(go->mppe & (MPPE_OPT_40 | MPPE_OPT_128))) { +- /* Could be misconfig, could be 40-bit disabled above. */ +- error("MPPE required, but both 40-bit and 128-bit disabled."); +- lcp_close(f->unit, "MPPE required but not available"); +- return; ++ /* ++ * Check whether the kernel knows about the various ++ * compression methods we might request. Key material ++ * unimportant here. ++ */ ++ if (go->mppc) { ++ opt_buf[0] = CI_MPPE; ++ opt_buf[1] = CILEN_MPPE; ++ opt_buf[2] = 0; ++ opt_buf[3] = 0; ++ opt_buf[4] = 0; ++ opt_buf[5] = MPPE_MPPC; ++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE, 0) <= 0) ++ go->mppc = 0; ++ } ++ if (go->mppe_40) { ++ opt_buf[0] = CI_MPPE; ++ opt_buf[1] = CILEN_MPPE; ++ opt_buf[2] = MPPE_STATELESS; ++ opt_buf[3] = 0; ++ opt_buf[4] = 0; ++ opt_buf[5] = MPPE_40BIT; ++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE + MPPE_MAX_KEY_LEN, 0) <= 0) ++ go->mppe_40 = 0; ++ } ++ if (go->mppe_56) { ++ opt_buf[0] = CI_MPPE; ++ opt_buf[1] = CILEN_MPPE; ++ opt_buf[2] = MPPE_STATELESS; ++ opt_buf[3] = 0; ++ opt_buf[4] = 0; ++ opt_buf[5] = MPPE_56BIT; ++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE + MPPE_MAX_KEY_LEN, 0) <= 0) ++ go->mppe_56 = 0; ++ } ++ if (go->mppe_128) { ++ opt_buf[0] = CI_MPPE; ++ opt_buf[1] = CILEN_MPPE; ++ opt_buf[2] = MPPE_STATELESS; ++ opt_buf[3] = 0; ++ opt_buf[4] = 0; ++ opt_buf[5] = MPPE_128BIT; ++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE + MPPE_MAX_KEY_LEN, 0) <= 0) ++ go->mppe_128 = 0; ++ } ++ if (!go->mppe_40 && !go->mppe_56 && !go->mppe_128) { ++ if (ccp_wantoptions[f->unit].mppe) { ++ error("MPPE required, but kernel has no support."); ++ lcp_close(f->unit, "MPPE required but not available"); ++ } ++ go->mppe = go->mppe_stateless = 0; ++ } else { ++ /* MPPE is not compatible with other compression types */ ++ if (ccp_wantoptions[f->unit].mppe) { ++ ao->bsd_compress = go->bsd_compress = 0; ++ ao->predictor_1 = go->predictor_1 = 0; ++ ao->predictor_2 = go->predictor_2 = 0; ++ ao->deflate = go->deflate = 0; ++ ao->lzs = go->lzs = 0; ++ } + } +- +- /* sync options */ +- ao->mppe = go->mppe; +- /* MPPE is not compatible with other compression types */ +- ao->bsd_compress = go->bsd_compress = 0; +- ao->predictor_1 = go->predictor_1 = 0; +- ao->predictor_2 = go->predictor_2 = 0; +- ao->deflate = go->deflate = 0; + } + #endif /* MPPE */ +- +- /* +- * Check whether the kernel knows about the various +- * compression methods we might request. +- */ +-#ifdef MPPE +- if (go->mppe) { +- opt_buf[0] = CI_MPPE; +- opt_buf[1] = CILEN_MPPE; +- MPPE_OPTS_TO_CI(go->mppe, &opt_buf[2]); +- /* Key material unimportant here. */ +- if (ccp_test(f->unit, opt_buf, CILEN_MPPE + MPPE_MAX_KEY_LEN, 0) <= 0) { +- error("MPPE required, but kernel has no support."); +- lcp_close(f->unit, "MPPE required but not available"); +- } ++ if (go->lzs) { ++ opt_buf[0] = CI_LZS; ++ opt_buf[1] = CILEN_LZS; ++ opt_buf[2] = go->lzs_hists >> 8; ++ opt_buf[3] = go->lzs_hists & 0xff; ++ opt_buf[4] = LZS_MODE_SEQ; ++ if (ccp_test(f->unit, opt_buf, CILEN_LZS, 0) <= 0) ++ go->lzs = 0; + } +-#endif + if (go->bsd_compress) { + opt_buf[0] = CI_BSD_COMPRESS; + opt_buf[1] = CILEN_BSD_COMPRESS; +@@ -679,7 +814,8 @@ ccp_cilen(f) + + (go->deflate? CILEN_DEFLATE: 0) + + (go->predictor_1? CILEN_PREDICTOR_1: 0) + + (go->predictor_2? CILEN_PREDICTOR_2: 0) +- + (go->mppe? CILEN_MPPE: 0); ++ + (go->lzs? CILEN_LZS: 0) ++ + ((go->mppe || go->mppc)? CILEN_MPPE: 0); + } + + /* +@@ -693,6 +829,8 @@ ccp_addci(f, p, lenp) + { + int res; + ccp_options *go = &ccp_gotoptions[f->unit]; ++ ccp_options *ao = &ccp_allowoptions[f->unit]; ++ ccp_options *wo = &ccp_wantoptions[f->unit]; + u_char *p0 = p; + + /* +@@ -701,22 +839,43 @@ ccp_addci(f, p, lenp) + * in case it gets Acked. + */ + #ifdef MPPE +- if (go->mppe) { ++ if (go->mppe || go->mppc || (!wo->mppe && ao->mppe)) { + u_char opt_buf[CILEN_MPPE + MPPE_MAX_KEY_LEN]; + +- p[0] = opt_buf[0] = CI_MPPE; +- p[1] = opt_buf[1] = CILEN_MPPE; +- MPPE_OPTS_TO_CI(go->mppe, &p[2]); +- MPPE_OPTS_TO_CI(go->mppe, &opt_buf[2]); ++ p[0] = CI_MPPE; ++ p[1] = CILEN_MPPE; ++ p[2] = (go->mppe_stateless ? MPPE_STATELESS : 0); ++ p[3] = 0; ++ p[4] = 0; ++ p[5] = (go->mppe_40 ? MPPE_40BIT : 0) | (go->mppe_56 ? MPPE_56BIT : 0) | ++ (go->mppe_128 ? MPPE_128BIT : 0) | (go->mppc ? MPPE_MPPC : 0); ++ ++ BCOPY(p, opt_buf, CILEN_MPPE); + BCOPY(mppe_recv_key, &opt_buf[CILEN_MPPE], MPPE_MAX_KEY_LEN); + res = ccp_test(f->unit, opt_buf, CILEN_MPPE + MPPE_MAX_KEY_LEN, 0); +- if (res > 0) ++ if (res > 0) { + p += CILEN_MPPE; +- else ++ } else { + /* This shouldn't happen, we've already tested it! */ +- lcp_close(f->unit, "MPPE required but not available in kernel"); ++ go->mppe = go->mppe_40 = go->mppe_56 = go->mppe_128 = ++ go->mppe_stateless = go->mppc = 0; ++ if (ccp_wantoptions[f->unit].mppe) ++ lcp_close(f->unit, "MPPE required but not available in kernel"); ++ } ++ } ++#endif /* MPPE */ ++ if (go->lzs) { ++ p[0] = CI_LZS; ++ p[1] = CILEN_LZS; ++ p[2] = go->lzs_hists >> 8; ++ p[3] = go->lzs_hists & 0xff; ++ p[4] = LZS_MODE_SEQ; ++ res = ccp_test(f->unit, p, CILEN_LZS, 0); ++ if (res > 0) { ++ p += CILEN_LZS; ++ } else ++ go->lzs = 0; + } +-#endif + if (go->deflate) { + p[0] = go->deflate_correct? CI_DEFLATE: CI_DEFLATE_DRAFT; + p[1] = CILEN_DEFLATE; +@@ -802,7 +961,7 @@ ccp_addci(f, p, lenp) + + /* + * ccp_ackci - process a received configure-ack, and return +- * 1 iff the packet was OK. ++ * 1 if the packet was OK. + */ + static int + ccp_ackci(f, p, len) +@@ -811,24 +970,44 @@ ccp_ackci(f, p, len) + int len; + { + ccp_options *go = &ccp_gotoptions[f->unit]; ++ ccp_options *ao = &ccp_allowoptions[f->unit]; ++ ccp_options *wo = &ccp_wantoptions[f->unit]; + u_char *p0 = p; + + #ifdef MPPE +- if (go->mppe) { +- u_char opt_buf[CILEN_MPPE]; +- +- opt_buf[0] = CI_MPPE; +- opt_buf[1] = CILEN_MPPE; +- MPPE_OPTS_TO_CI(go->mppe, &opt_buf[2]); +- if (len < CILEN_MPPE || memcmp(opt_buf, p, CILEN_MPPE)) ++ if (go->mppe || go->mppc || (!wo->mppe && ao->mppe)) { ++ if (len < CILEN_MPPE ++ || p[1] != CILEN_MPPE || p[0] != CI_MPPE ++ || p[2] != (go->mppe_stateless ? MPPE_STATELESS : 0) ++ || p[3] != 0 ++ || p[4] != 0 ++ || (p[5] != ((go->mppe_40 ? MPPE_40BIT : 0) | ++ (go->mppc ? MPPE_MPPC : 0)) ++ && p[5] != ((go->mppe_56 ? MPPE_56BIT : 0) | ++ (go->mppc ? MPPE_MPPC : 0)) ++ && p[5] != ((go->mppe_128 ? MPPE_128BIT : 0) | ++ (go->mppc ? MPPE_MPPC : 0)))) + return 0; ++ if (go->mppe_40 || go->mppe_56 || go->mppe_128) ++ go->mppe = 1; + p += CILEN_MPPE; + len -= CILEN_MPPE; ++ /* Cope with first/fast ack */ ++ if (p == p0 && len == 0) ++ return 1; ++ } ++#endif /* MPPE */ ++ if (go->lzs) { ++ if (len < CILEN_LZS || p[0] != CI_LZS || p[1] != CILEN_LZS ++ || p[2] != go->lzs_hists>>8 || p[3] != (go->lzs_hists&0xff) ++ || p[4] != LZS_MODE_SEQ) ++ return 0; ++ p += CILEN_LZS; ++ len -= CILEN_LZS; + /* XXX Cope with first/fast ack */ +- if (len == 0) ++ if (p == p0 && len == 0) + return 1; + } +-#endif + if (go->deflate) { + if (len < CILEN_DEFLATE + || p[0] != (go->deflate_correct? CI_DEFLATE: CI_DEFLATE_DRAFT) +@@ -901,6 +1080,8 @@ ccp_nakci(f, p, len, treat_as_reject) + int treat_as_reject; + { + ccp_options *go = &ccp_gotoptions[f->unit]; ++ ccp_options *ao = &ccp_allowoptions[f->unit]; ++ ccp_options *wo = &ccp_wantoptions[f->unit]; + ccp_options no; /* options we've seen already */ + ccp_options try; /* options to ask for next time */ + +@@ -908,28 +1089,100 @@ ccp_nakci(f, p, len, treat_as_reject) + try = *go; + + #ifdef MPPE +- if (go->mppe && len >= CILEN_MPPE +- && p[0] == CI_MPPE && p[1] == CILEN_MPPE) { +- no.mppe = 1; +- /* +- * Peer wants us to use a different strength or other setting. +- * Fail if we aren't willing to use his suggestion. +- */ +- MPPE_CI_TO_OPTS(&p[2], try.mppe); +- if ((try.mppe & MPPE_OPT_STATEFUL) && refuse_mppe_stateful) { +- error("Refusing MPPE stateful mode offered by peer"); +- try.mppe = 0; +- } else if (((go->mppe | MPPE_OPT_STATEFUL) & try.mppe) != try.mppe) { +- /* Peer must have set options we didn't request (suggest) */ +- try.mppe = 0; +- } ++ if ((go->mppe || go->mppc || (!wo->mppe && ao->mppe)) && ++ len >= CILEN_MPPE && p[0] == CI_MPPE && p[1] == CILEN_MPPE) { + +- if (!try.mppe) { +- error("MPPE required but peer negotiation failed"); +- lcp_close(f->unit, "MPPE required but peer negotiation failed"); ++ if (go->mppc) { ++ no.mppc = 1; ++ if (!(p[5] & MPPE_MPPC)) ++ try.mppc = 0; ++ } ++ ++ if (go->mppe) ++ no.mppe = 1; ++ if (go->mppe_40) ++ no.mppe_40 = 1; ++ if (go->mppe_56) ++ no.mppe_56 = 1; ++ if (go->mppe_128) ++ no.mppe_128 = 1; ++ if (go->mppe_stateless) ++ no.mppe_stateless = 1; ++ ++ if (ao->mppe_40) { ++ if ((p[5] & MPPE_40BIT)) ++ try.mppe_40 = 1; ++ else ++ try.mppe_40 = (p[5] == 0) ? 1 : 0; ++ } ++ if (ao->mppe_56) { ++ if ((p[5] & MPPE_56BIT)) ++ try.mppe_56 = 1; ++ else ++ try.mppe_56 = (p[5] == 0) ? 1 : 0; ++ } ++ if (ao->mppe_128) { ++ if ((p[5] & MPPE_128BIT)) ++ try.mppe_128 = 1; ++ else ++ try.mppe_128 = (p[5] == 0) ? 1 : 0; ++ } ++ ++ if (ao->mppe_stateless) { ++ if ((p[2] & MPPE_STATELESS) || wo->mppe_stateless) ++ try.mppe_stateless = 1; ++ else ++ try.mppe_stateless = 0; ++ } ++ ++ if (!try.mppe_56 && !try.mppe_40 && !try.mppe_128) { ++ try.mppe = try.mppe_stateless = 0; ++ if (wo->mppe) { ++ /* we require encryption, but peer doesn't support it ++ so we close connection */ ++ wo->mppc = wo->mppe = wo->mppe_stateless = wo->mppe_40 = ++ wo->mppe_56 = wo->mppe_128 = 0; ++ lcp_close(f->unit, "MPPE required but cannot negotiate MPPE " ++ "key length"); ++ } ++ } ++ if (wo->mppe && (wo->mppe_40 != try.mppe_40) && ++ (wo->mppe_56 != try.mppe_56) && (wo->mppe_128 != try.mppe_128)) { ++ /* cannot negotiate key length */ ++ wo->mppc = wo->mppe = wo->mppe_stateless = wo->mppe_40 = ++ wo->mppe_56 = wo->mppe_128 = 0; ++ lcp_close(f->unit, "Cannot negotiate MPPE key length"); + } ++ if (try.mppe_40 && try.mppe_56 && try.mppe_128) ++ try.mppe_40 = try.mppe_56 = 0; ++ else ++ if (try.mppe_56 && try.mppe_128) ++ try.mppe_56 = 0; ++ else ++ if (try.mppe_40 && try.mppe_128) ++ try.mppe_40 = 0; ++ else ++ if (try.mppe_40 && try.mppe_56) ++ try.mppe_40 = 0; ++ ++ p += CILEN_MPPE; ++ len -= CILEN_MPPE; + } + #endif /* MPPE */ ++ ++ if (go->lzs && len >= CILEN_LZS && p[0] == CI_LZS && p[1] == CILEN_LZS) { ++ no.lzs = 1; ++ if (((p[2]<<8)|p[3]) > 1 || (p[4] != LZS_MODE_SEQ && ++ p[4] != LZS_MODE_EXT)) ++ try.lzs = 0; ++ else { ++ try.lzs_mode = p[4]; ++ try.lzs_hists = (p[2] << 8) | p[3]; ++ } ++ p += CILEN_LZS; ++ len -= CILEN_LZS; ++ } ++ + if (go->deflate && len >= CILEN_DEFLATE + && p[0] == (go->deflate_correct? CI_DEFLATE: CI_DEFLATE_DRAFT) + && p[1] == CILEN_DEFLATE) { +@@ -1002,14 +1255,50 @@ ccp_rejci(f, p, len) + return -1; + + #ifdef MPPE +- if (go->mppe && len >= CILEN_MPPE ++ if ((go->mppe || go->mppc) && len >= CILEN_MPPE + && p[0] == CI_MPPE && p[1] == CILEN_MPPE) { +- error("MPPE required but peer refused"); +- lcp_close(f->unit, "MPPE required but peer refused"); ++ ccp_options *wo = &ccp_wantoptions[f->unit]; ++ if (p[2] != (go->mppe_stateless ? MPPE_STATELESS : 0) || ++ p[3] != 0 || ++ p[4] != 0 || ++ p[5] != ((go->mppe_40 ? MPPE_40BIT : 0) | ++ (go->mppe_56 ? MPPE_56BIT : 0) | ++ (go->mppe_128 ? MPPE_128BIT : 0) | ++ (go->mppc ? MPPE_MPPC : 0))) ++ return 0; ++ if (go->mppc) ++ try.mppc = 0; ++ if (go->mppe) { ++ try.mppe = 0; ++ if (go->mppe_40) ++ try.mppe_40 = 0; ++ if (go->mppe_56) ++ try.mppe_56 = 0; ++ if (go->mppe_128) ++ try.mppe_128 = 0; ++ if (go->mppe_stateless) ++ try.mppe_stateless = 0; ++ if (!try.mppe_56 && !try.mppe_40 && !try.mppe_128) ++ try.mppe = try.mppe_stateless = 0; ++ if (wo->mppe) { /* we want MPPE but cannot negotiate key length */ ++ wo->mppc = wo->mppe = wo->mppe_stateless = wo->mppe_40 = ++ wo->mppe_56 = wo->mppe_128 = 0; ++ lcp_close(f->unit, "MPPE required but cannot negotiate MPPE " ++ "key length"); ++ } ++ } + p += CILEN_MPPE; + len -= CILEN_MPPE; + } +-#endif ++#endif /* MPPE */ ++ if (go->lzs && len >= CILEN_LZS && p[0] == CI_LZS && p[1] == CILEN_LZS) { ++ if (p[2] != go->lzs_hists>>8 || p[3] != (go->lzs_hists&0xff) ++ || p[4] != go->lzs_mode) ++ return 0; ++ try.lzs = 0; ++ p += CILEN_LZS; ++ len -= CILEN_LZS; ++ } + if (go->deflate_correct && len >= CILEN_DEFLATE + && p[0] == CI_DEFLATE && p[1] == CILEN_DEFLATE) { + if (p[2] != DEFLATE_MAKE_OPT(go->deflate_size) +@@ -1073,14 +1362,15 @@ ccp_reqci(f, p, lenp, dont_nak) + int dont_nak; + { + int ret, newret, res; +- u_char *p0, *retp; ++ u_char *p0, *retp, p2, p5; + int len, clen, type, nb; + ccp_options *ho = &ccp_hisoptions[f->unit]; + ccp_options *ao = &ccp_allowoptions[f->unit]; ++ ccp_options *wo = &ccp_wantoptions[f->unit]; + #ifdef MPPE +- bool rej_for_ci_mppe = 1; /* Are we rejecting based on a bad/missing */ +- /* CI_MPPE, or due to other options? */ +-#endif ++ u_char opt_buf[CILEN_MPPE + MPPE_MAX_KEY_LEN]; ++/* int mtu; */ ++#endif /* MPPE */ + + ret = CONFACK; + retp = p0 = p; +@@ -1103,106 +1393,302 @@ ccp_reqci(f, p, lenp, dont_nak) + switch (type) { + #ifdef MPPE + case CI_MPPE: +- if (!ao->mppe || clen != CILEN_MPPE) { ++ if ((!ao->mppc && !ao->mppe) || clen != CILEN_MPPE) { + newret = CONFREJ; + break; + } +- MPPE_CI_TO_OPTS(&p[2], ho->mppe); +- +- /* Nak if anything unsupported or unknown are set. */ +- if (ho->mppe & MPPE_OPT_UNSUPPORTED) { +- newret = CONFNAK; +- ho->mppe &= ~MPPE_OPT_UNSUPPORTED; +- } +- if (ho->mppe & MPPE_OPT_UNKNOWN) { ++ p2 = p[2]; ++ p5 = p[5]; ++ /* not sure what they want, tell 'em what we got */ ++ if (((p[2] & ~MPPE_STATELESS) != 0 || p[3] != 0 || p[4] != 0 || ++ (p[5] & ~(MPPE_40BIT | MPPE_56BIT | MPPE_128BIT | ++ MPPE_MPPC)) != 0 || p[5] == 0) || ++ (p[2] == 0 && p[3] == 0 && p[4] == 0 && p[5] == 0)) { + newret = CONFNAK; +- ho->mppe &= ~MPPE_OPT_UNKNOWN; +- } +- +- /* Check state opt */ +- if (ho->mppe & MPPE_OPT_STATEFUL) { +- /* +- * We can Nak and request stateless, but it's a +- * lot easier to just assume the peer will request +- * it if he can do it; stateful mode is bad over +- * the Internet -- which is where we expect MPPE. +- */ +- if (refuse_mppe_stateful) { +- error("Refusing MPPE stateful mode offered by peer"); +- newret = CONFREJ; +- break; ++ p[2] = (wo->mppe_stateless ? MPPE_STATELESS : 0); ++ p[3] = 0; ++ p[4] = 0; ++ p[5] = (wo->mppe_40 ? MPPE_40BIT : 0) | ++ (wo->mppe_56 ? MPPE_56BIT : 0) | ++ (wo->mppe_128 ? MPPE_128BIT : 0) | ++ (wo->mppc ? MPPE_MPPC : 0); ++ break; ++ } ++ ++ if ((p[5] & MPPE_MPPC)) { ++ if (ao->mppc) { ++ ho->mppc = 1; ++ BCOPY(p, opt_buf, CILEN_MPPE); ++ opt_buf[2] = opt_buf[3] = opt_buf[4] = 0; ++ opt_buf[5] = MPPE_MPPC; ++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE, 1) <= 0) { ++ ho->mppc = 0; ++ p[5] &= ~MPPE_MPPC; ++ newret = CONFNAK; ++ } ++ } else { ++ newret = CONFREJ; ++ if (wo->mppe || ao->mppe) { ++ p[5] &= ~MPPE_MPPC; ++ newret = CONFNAK; ++ } + } + } +- +- /* Find out which of {S,L} are set. */ +- if ((ho->mppe & MPPE_OPT_128) +- && (ho->mppe & MPPE_OPT_40)) { +- /* Both are set, negotiate the strongest. */ +- newret = CONFNAK; +- if (ao->mppe & MPPE_OPT_128) +- ho->mppe &= ~MPPE_OPT_40; +- else if (ao->mppe & MPPE_OPT_40) +- ho->mppe &= ~MPPE_OPT_128; +- else { +- newret = CONFREJ; +- break; +- } +- } else if (ho->mppe & MPPE_OPT_128) { +- if (!(ao->mppe & MPPE_OPT_128)) { +- newret = CONFREJ; +- break; +- } +- } else if (ho->mppe & MPPE_OPT_40) { +- if (!(ao->mppe & MPPE_OPT_40)) { +- newret = CONFREJ; +- break; +- } ++ if (ao->mppe) ++ ho->mppe = 1; ++ ++ if ((p[2] & MPPE_STATELESS)) { ++ if (ao->mppe_stateless) { ++ if (wo->mppe_stateless) ++ ho->mppe_stateless = 1; ++ else { ++ newret = CONFNAK; ++ if (!dont_nak) ++ p[2] &= ~MPPE_STATELESS; ++ } ++ } else { ++ newret = CONFNAK; ++ if (!dont_nak) ++ p[2] &= ~MPPE_STATELESS; ++ } ++ } else { ++ if (wo->mppe_stateless && !dont_nak) { ++ wo->mppe_stateless = 0; ++ newret = CONFNAK; ++ p[2] |= MPPE_STATELESS; ++ } ++ } ++ ++ if ((p[5] & ~MPPE_MPPC) == (MPPE_40BIT|MPPE_56BIT|MPPE_128BIT)) { ++ newret = CONFNAK; ++ if (ao->mppe_128) { ++ ho->mppe_128 = 1; ++ p[5] &= ~(MPPE_40BIT|MPPE_56BIT); ++ BCOPY(p, opt_buf, CILEN_MPPE); ++ BCOPY(mppe_send_key, &opt_buf[CILEN_MPPE], ++ MPPE_MAX_KEY_LEN); ++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE + ++ MPPE_MAX_KEY_LEN, 1) <= 0) { ++ ho->mppe_128 = 0; ++ p[5] |= (MPPE_40BIT|MPPE_56BIT); ++ p[5] &= ~MPPE_128BIT; ++ goto check_mppe_56_40; ++ } ++ goto check_mppe; ++ } ++ p[5] &= ~MPPE_128BIT; ++ goto check_mppe_56_40; ++ } ++ if ((p[5] & ~MPPE_MPPC) == (MPPE_56BIT|MPPE_128BIT)) { ++ newret = CONFNAK; ++ if (ao->mppe_128) { ++ ho->mppe_128 = 1; ++ p[5] &= ~MPPE_56BIT; ++ BCOPY(p, opt_buf, CILEN_MPPE); ++ BCOPY(mppe_send_key, &opt_buf[CILEN_MPPE], ++ MPPE_MAX_KEY_LEN); ++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE + ++ MPPE_MAX_KEY_LEN, 1) <= 0) { ++ ho->mppe_128 = 0; ++ p[5] |= MPPE_56BIT; ++ p[5] &= ~MPPE_128BIT; ++ goto check_mppe_56; ++ } ++ goto check_mppe; ++ } ++ p[5] &= ~MPPE_128BIT; ++ goto check_mppe_56; ++ } ++ if ((p[5] & ~MPPE_MPPC) == (MPPE_40BIT|MPPE_128BIT)) { ++ newret = CONFNAK; ++ if (ao->mppe_128) { ++ ho->mppe_128 = 1; ++ p[5] &= ~MPPE_40BIT; ++ BCOPY(p, opt_buf, CILEN_MPPE); ++ BCOPY(mppe_send_key, &opt_buf[CILEN_MPPE], ++ MPPE_MAX_KEY_LEN); ++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE + ++ MPPE_MAX_KEY_LEN, 1) <= 0) { ++ ho->mppe_128 = 0; ++ p[5] |= MPPE_40BIT; ++ p[5] &= ~MPPE_128BIT; ++ goto check_mppe_40; ++ } ++ goto check_mppe; ++ } ++ p[5] &= ~MPPE_128BIT; ++ goto check_mppe_40; ++ } ++ if ((p[5] & ~MPPE_MPPC) == MPPE_128BIT) { ++ if (ao->mppe_128) { ++ ho->mppe_128 = 1; ++ BCOPY(p, opt_buf, CILEN_MPPE); ++ BCOPY(mppe_send_key, &opt_buf[CILEN_MPPE], ++ MPPE_MAX_KEY_LEN); ++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE + ++ MPPE_MAX_KEY_LEN, 1) <= 0) { ++ ho->mppe_128 = 0; ++ p[5] &= ~MPPE_128BIT; ++ newret = CONFNAK; ++ } ++ goto check_mppe; ++ } ++ p[5] &= ~MPPE_128BIT; ++ newret = CONFNAK; ++ goto check_mppe; ++ } ++ check_mppe_56_40: ++ if ((p[5] & ~MPPE_MPPC) == (MPPE_40BIT|MPPE_56BIT)) { ++ newret = CONFNAK; ++ if (ao->mppe_56) { ++ ho->mppe_56 = 1; ++ p[5] &= ~MPPE_40BIT; ++ BCOPY(p, opt_buf, CILEN_MPPE); ++ BCOPY(mppe_send_key, &opt_buf[CILEN_MPPE], ++ MPPE_MAX_KEY_LEN); ++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE + ++ MPPE_MAX_KEY_LEN, 1) <= 0) { ++ ho->mppe_56 = 0; ++ p[5] |= MPPE_40BIT; ++ p[5] &= ~MPPE_56BIT; ++ newret = CONFNAK; ++ goto check_mppe_40; ++ } ++ goto check_mppe; ++ } ++ p[5] &= ~MPPE_56BIT; ++ goto check_mppe_40; ++ } ++ check_mppe_56: ++ if ((p[5] & ~MPPE_MPPC) == MPPE_56BIT) { ++ if (ao->mppe_56) { ++ ho->mppe_56 = 1; ++ BCOPY(p, opt_buf, CILEN_MPPE); ++ BCOPY(mppe_send_key, &opt_buf[CILEN_MPPE], ++ MPPE_MAX_KEY_LEN); ++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE + ++ MPPE_MAX_KEY_LEN, 1) <= 0) { ++ ho->mppe_56 = 0; ++ p[5] &= ~MPPE_56BIT; ++ newret = CONFNAK; ++ } ++ goto check_mppe; ++ } ++ p[5] &= ~MPPE_56BIT; ++ newret = CONFNAK; ++ goto check_mppe; ++ } ++ check_mppe_40: ++ if ((p[5] & ~MPPE_MPPC) == MPPE_40BIT) { ++ if (ao->mppe_40) { ++ ho->mppe_40 = 1; ++ BCOPY(p, opt_buf, CILEN_MPPE); ++ BCOPY(mppe_send_key, &opt_buf[CILEN_MPPE], ++ MPPE_MAX_KEY_LEN); ++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE + ++ MPPE_MAX_KEY_LEN, 1) <= 0) { ++ ho->mppe_40 = 0; ++ p[5] &= ~MPPE_40BIT; ++ newret = CONFNAK; ++ } ++ goto check_mppe; ++ } ++ p[5] &= ~MPPE_40BIT; ++ } ++ ++ check_mppe: ++ if (!ho->mppe_40 && !ho->mppe_56 && !ho->mppe_128) { ++ if (wo->mppe_40 || wo->mppe_56 || wo->mppe_128) { ++ newret = CONFNAK; ++ p[2] |= (wo->mppe_stateless ? MPPE_STATELESS : 0); ++ p[5] |= (wo->mppe_40 ? MPPE_40BIT : 0) | ++ (wo->mppe_56 ? MPPE_56BIT : 0) | ++ (wo->mppe_128 ? MPPE_128BIT : 0) | ++ (wo->mppc ? MPPE_MPPC : 0); ++ } else { ++ ho->mppe = ho->mppe_stateless = 0; ++ } + } else { +- /* Neither are set. */ +- /* We cannot accept this. */ +- newret = CONFNAK; +- /* Give the peer our idea of what can be used, +- so it can choose and confirm */ +- ho->mppe = ao->mppe; +- } +- +- /* rebuild the opts */ +- MPPE_OPTS_TO_CI(ho->mppe, &p[2]); +- if (newret == CONFACK) { +- u_char opt_buf[CILEN_MPPE + MPPE_MAX_KEY_LEN]; +- int mtu; +- +- BCOPY(p, opt_buf, CILEN_MPPE); +- BCOPY(mppe_send_key, &opt_buf[CILEN_MPPE], +- MPPE_MAX_KEY_LEN); +- if (ccp_test(f->unit, opt_buf, +- CILEN_MPPE + MPPE_MAX_KEY_LEN, 1) <= 0) { +- /* This shouldn't happen, we've already tested it! */ +- error("MPPE required, but kernel has no support."); +- lcp_close(f->unit, "MPPE required but not available"); +- newret = CONFREJ; +- break; +- } +- /* +- * We need to decrease the interface MTU by MPPE_PAD +- * because MPPE frames **grow**. The kernel [must] +- * allocate MPPE_PAD extra bytes in xmit buffers. +- */ +- mtu = netif_get_mtu(f->unit); +- if (mtu) +- netif_set_mtu(f->unit, mtu - MPPE_PAD); +- else +- newret = CONFREJ; +- } +- +- /* +- * We have accepted MPPE or are willing to negotiate +- * MPPE parameters. A CONFREJ is due to subsequent +- * (non-MPPE) processing. +- */ +- rej_for_ci_mppe = 0; +- break; +-#endif /* MPPE */ ++ /* MPPE is not compatible with other compression types */ ++ if (wo->mppe) { ++ ao->bsd_compress = 0; ++ ao->predictor_1 = 0; ++ ao->predictor_2 = 0; ++ ao->deflate = 0; ++ ao->lzs = 0; ++ } ++ } ++ if ((!ho->mppc || !ao->mppc) && !ho->mppe) { ++ p[2] = p2; ++ p[5] = p5; ++ newret = CONFREJ; ++ break; ++ } ++ ++ /* ++ * I have commented the code below because according to RFC1547 ++ * MTU is only information for higher level protocols about ++ * "the maximum allowable length for a packet (q.v.) transmitted ++ * over a point-to-point link without incurring network layer ++ * fragmentation." Of course a PPP implementation should be able ++ * to handle overhead added by MPPE - in our case apropriate code ++ * is located in drivers/net/ppp_generic.c in the kernel sources. ++ * ++ * According to RFC1661: ++ * - when negotiated MRU is less than 1500 octets, a PPP ++ * implementation must still be able to receive at least 1500 ++ * octets, ++ * - when PFC is negotiated, a PPP implementation is still ++ * required to receive frames with uncompressed protocol field. ++ * ++ * So why not to handle MPPE overhead without changing MTU value? ++ * I am sure that RFC3078, unfortunately silently, assumes that. ++ */ ++ ++ /* ++ * We need to decrease the interface MTU by MPPE_PAD ++ * because MPPE frames **grow**. The kernel [must] ++ * allocate MPPE_PAD extra bytes in xmit buffers. ++ */ ++ /* ++ mtu = netif_get_mtu(f->unit); ++ if (mtu) { ++ netif_set_mtu(f->unit, mtu - MPPE_PAD); ++ } else { ++ newret = CONFREJ; ++ if (ccp_wantoptions[f->unit].mppe) { ++ error("Cannot adjust MTU needed by MPPE."); ++ lcp_close(f->unit, "Cannot adjust MTU needed by MPPE."); ++ } ++ } ++ */ ++ break; ++ #endif /* MPPE */ ++ ++ case CI_LZS: ++ if (!ao->lzs || clen != CILEN_LZS) { ++ newret = CONFREJ; ++ break; ++ } ++ ++ ho->lzs = 1; ++ ho->lzs_hists = (p[2] << 8) | p[3]; ++ ho->lzs_mode = p[4]; ++ if ((ho->lzs_hists != ao->lzs_hists) || ++ (ho->lzs_mode != ao->lzs_mode)) { ++ newret = CONFNAK; ++ if (!dont_nak) { ++ p[2] = ao->lzs_hists >> 8; ++ p[3] = ao->lzs_hists & 0xff; ++ p[4] = ao->lzs_mode; ++ } else ++ break; ++ } ++ ++ if (p == p0 && ccp_test(f->unit, p, CILEN_LZS, 1) <= 0) { ++ newret = CONFREJ; ++ } ++ break; + case CI_DEFLATE: + case CI_DEFLATE_DRAFT: + if (!ao->deflate || clen != CILEN_DEFLATE +@@ -1344,12 +1830,6 @@ ccp_reqci(f, p, lenp, dont_nak) + else + *lenp = retp - p0; + } +-#ifdef MPPE +- if (ret == CONFREJ && ao->mppe && rej_for_ci_mppe) { +- error("MPPE required but peer negotiation failed"); +- lcp_close(f->unit, "MPPE required but peer negotiation failed"); +- } +-#endif + return ret; + } + +@@ -1371,24 +1851,35 @@ method_name(opt, opt2) + char *p = result; + char *q = result + sizeof(result); /* 1 past result */ + +- slprintf(p, q - p, "MPPE "); +- p += 5; +- if (opt->mppe & MPPE_OPT_128) { +- slprintf(p, q - p, "128-bit "); +- p += 8; +- } +- if (opt->mppe & MPPE_OPT_40) { +- slprintf(p, q - p, "40-bit "); +- p += 7; +- } +- if (opt->mppe & MPPE_OPT_STATEFUL) +- slprintf(p, q - p, "stateful"); +- else +- slprintf(p, q - p, "stateless"); +- ++ if (opt->mppe) { ++ if (opt->mppc) { ++ slprintf(p, q - p, "MPPC/MPPE "); ++ p += 10; ++ } else { ++ slprintf(p, q - p, "MPPE "); ++ p += 5; ++ } ++ if (opt->mppe_128) { ++ slprintf(p, q - p, "128-bit "); ++ p += 8; ++ } else if (opt->mppe_56) { ++ slprintf(p, q - p, "56-bit "); ++ p += 7; ++ } else if (opt->mppe_40) { ++ slprintf(p, q - p, "40-bit "); ++ p += 7; ++ } ++ if (opt->mppe_stateless) ++ slprintf(p, q - p, "stateless"); ++ else ++ slprintf(p, q - p, "stateful"); ++ } else if (opt->mppc) ++ slprintf(p, q - p, "MPPC"); + break; + } +-#endif ++#endif /* MPPE */ ++ case CI_LZS: ++ return "Stac LZS"; + case CI_DEFLATE: + case CI_DEFLATE_DRAFT: + if (opt2 != NULL && opt2->deflate_size != opt->deflate_size) +@@ -1444,12 +1935,12 @@ ccp_up(f) + } else if (ANY_COMPRESS(*ho)) + notice("%s transmit compression enabled", method_name(ho, NULL)); + #ifdef MPPE +- if (go->mppe) { ++ if (go->mppe || go->mppc) { + BZERO(mppe_recv_key, MPPE_MAX_KEY_LEN); + BZERO(mppe_send_key, MPPE_MAX_KEY_LEN); + continue_networks(f->unit); /* Bring up IP et al */ + } +-#endif ++#endif /* MPPE */ + } + + /* +@@ -1472,7 +1963,7 @@ ccp_down(f) + lcp_close(f->unit, "MPPE disabled"); + } + } +-#endif ++#endif /* MPPE */ + } + + /* +@@ -1532,24 +2023,28 @@ ccp_printpkt(p, plen, printer, arg) + #ifdef MPPE + case CI_MPPE: + if (optlen >= CILEN_MPPE) { +- u_char mppe_opts; +- +- MPPE_CI_TO_OPTS(&p[2], mppe_opts); +- printer(arg, "mppe %s %s %s %s %s %s%s", +- (p[2] & MPPE_H_BIT)? "+H": "-H", +- (p[5] & MPPE_M_BIT)? "+M": "-M", +- (p[5] & MPPE_S_BIT)? "+S": "-S", +- (p[5] & MPPE_L_BIT)? "+L": "-L", ++ printer(arg, "mppe %s %s %s %s %s %s", ++ (p[2] & MPPE_STATELESS)? "+H": "-H", ++ (p[5] & MPPE_56BIT)? "+M": "-M", ++ (p[5] & MPPE_128BIT)? "+S": "-S", ++ (p[5] & MPPE_40BIT)? "+L": "-L", + (p[5] & MPPE_D_BIT)? "+D": "-D", +- (p[5] & MPPE_C_BIT)? "+C": "-C", +- (mppe_opts & MPPE_OPT_UNKNOWN)? " +U": ""); +- if (mppe_opts & MPPE_OPT_UNKNOWN) ++ (p[5] & MPPE_MPPC)? "+C": "-C"); ++ if ((p[5] & ~(MPPE_56BIT | MPPE_128BIT | MPPE_40BIT | ++ MPPE_D_BIT | MPPE_MPPC)) || ++ (p[2] & ~MPPE_STATELESS)) + printer(arg, " (%.2x %.2x %.2x %.2x)", + p[2], p[3], p[4], p[5]); + p += CILEN_MPPE; + } + break; +-#endif ++#endif /* MPPE */ ++ case CI_LZS: ++ if (optlen >= CILEN_LZS) { ++ printer(arg, "lzs %.2x %.2x %.2x", p[2], p[3], p[4]); ++ p += CILEN_LZS; ++ } ++ break; + case CI_DEFLATE: + case CI_DEFLATE_DRAFT: + if (optlen >= CILEN_DEFLATE) { +@@ -1635,6 +2130,7 @@ ccp_datainput(unit, pkt, len) + error("Lost compression sync: disabling compression"); + ccp_close(unit, "Lost compression sync"); + #ifdef MPPE ++ /* My module dosn't need this. J.D., 2003-07-06 */ + /* + * If we were doing MPPE, we must also take the link down. + */ +@@ -1642,9 +2138,18 @@ ccp_datainput(unit, pkt, len) + error("Too many MPPE errors, closing LCP"); + lcp_close(unit, "Too many MPPE errors"); + } +-#endif ++#endif /* MPPE */ + } else { + /* ++ * When LZS or MPPE/MPPC is negotiated we just send CCP_RESETREQ ++ * and don't wait for CCP_RESETACK ++ */ ++ if ((ccp_gotoptions[f->unit].method == CI_LZS) || ++ (ccp_gotoptions[f->unit].method == CI_MPPE)) { ++ fsm_sdata(f, CCP_RESETREQ, f->reqid = ++f->id, NULL, 0); ++ return; ++ } ++ /* + * Send a reset-request to reset the peer's compressor. + * We don't do that if we are still waiting for an + * acknowledgement to a previous reset-request. +--- a/pppd/ccp.h ++++ b/pppd/ccp.h +@@ -37,9 +37,17 @@ typedef struct ccp_options { + bool predictor_2; /* do Predictor-2? */ + bool deflate_correct; /* use correct code for deflate? */ + bool deflate_draft; /* use draft RFC code for deflate? */ ++ bool lzs; /* do Stac LZS? */ ++ bool mppc; /* do MPPC? */ + bool mppe; /* do MPPE? */ ++ bool mppe_40; /* allow 40 bit encryption? */ ++ bool mppe_56; /* allow 56 bit encryption? */ ++ bool mppe_128; /* allow 128 bit encryption? */ ++ bool mppe_stateless; /* allow stateless encryption */ + u_short bsd_bits; /* # bits/code for BSD Compress */ + u_short deflate_size; /* lg(window size) for Deflate */ ++ u_short lzs_mode; /* LZS check mode */ ++ u_short lzs_hists; /* number of LZS histories */ + short method; /* code for chosen compression method */ + } ccp_options; + +--- a/pppd/chap_ms.c ++++ b/pppd/chap_ms.c +@@ -963,13 +963,17 @@ set_mppe_enc_types(int policy, int types + /* + * Disable undesirable encryption types. Note that we don't ENABLE + * any encryption types, to avoid overriding manual configuration. ++ * ++ * It seems that 56 bit keys are unsupported in MS-RADIUS (see RFC 2548) + */ + switch(types) { + case MPPE_ENC_TYPES_RC4_40: +- ccp_wantoptions[0].mppe &= ~MPPE_OPT_128; /* disable 128-bit */ ++ ccp_wantoptions[0].mppe_128 = 0; /* disable 128-bit */ ++ ccp_wantoptions[0].mppe_56 = 0; /* disable 56-bit */ + break; + case MPPE_ENC_TYPES_RC4_128: +- ccp_wantoptions[0].mppe &= ~MPPE_OPT_40; /* disable 40-bit */ ++ ccp_wantoptions[0].mppe_56 = 0; /* disable 56-bit */ ++ ccp_wantoptions[0].mppe_40 = 0; /* disable 40-bit */ + break; + default: + break; |