/* * The peer has been successfully authenticated using `protocol'. */ void auth_peer_success(int unit, u16_t protocol, char *name, int namelen) { int pbit; AUTHDEBUG((LOG_INFO, "auth_peer_success: %d proto=%X\n", unit, protocol)); switch (protocol) { case PPP_CHAP: pbit = CHAP_PEER; break; case PPP_PAP: pbit = PAP_PEER; break; default: AUTHDEBUG((LOG_WARNING, "auth_peer_success: unknown protocol %x\n", protocol)); return; } /* * Save the authenticated name of the peer for later. */ if (namelen > sizeof(peer_authname) - 1) { namelen = sizeof(peer_authname) - 1; } BCOPY(name, peer_authname, namelen); peer_authname[namelen] = 0; /* * If there is no more authentication still to be done, * proceed to the network (or callback) phase. */ if ((auth_pending[unit] &= ~pbit) == 0) { network_phase(unit); } }
/* * We have successfully authenticated ourselves with the peer using `protocol'. */ void auth_withpeer_success(int unit, u16_t protocol) { int pbit; AUTHDEBUG((LOG_INFO, "auth_withpeer_success: %d proto=%X\n", unit, protocol)); switch (protocol) { case PPP_CHAP: pbit = CHAP_WITHPEER; break; case PPP_PAP: if (passwd_from_file) { BZERO(ppp_settings.passwd, MAXSECRETLEN); } pbit = PAP_WITHPEER; break; default: AUTHDEBUG((LOG_WARNING, "auth_peer_success: unknown protocol %x\n", protocol)); pbit = 0; } /* * If there is no more authentication still being done, * proceed to the network (or callback) phase. */ if ((auth_pending[unit] &= ~pbit) == 0) { network_phase(unit); } }
/* * np_up - a network protocol has come up. */ void np_up(int unit, u16_t proto) { LWIP_UNUSED_ARG(unit); LWIP_UNUSED_ARG(proto); AUTHDEBUG((LOG_INFO, "np_up: %d proto=%X\n", unit, proto)); if (num_np_up == 0) { AUTHDEBUG((LOG_INFO, "np_up: maxconnect=%d idle_time_limit=%d\n",ppp_settings.maxconnect,ppp_settings.idle_time_limit)); /* * At this point we consider that the link has come up successfully. */ if (ppp_settings.idle_time_limit > 0) { TIMEOUT(check_idle, NULL, ppp_settings.idle_time_limit); } /* * Set a timeout to close the connection once the maximum * connect time has expired. */ if (ppp_settings.maxconnect > 0) { TIMEOUT(connect_time_expired, 0, ppp_settings.maxconnect); } } ++num_np_up; }
/* * get_secret - open the CHAP secret file and return the secret * for authenticating the given client on the given server. * (We could be either client or server). */ int get_secret(int unit, char *client, char *server, char *secret, int *secret_len, int save_addrs) { #if 1 int len; struct wordlist *addrs; LWIP_UNUSED_ARG(unit); LWIP_UNUSED_ARG(server); LWIP_UNUSED_ARG(save_addrs); addrs = NULL; if(!client || !client[0] || strcmp(client, ppp_settings.user)) { return 0; } len = (int)strlen(ppp_settings.passwd); if (len > MAXSECRETLEN) { AUTHDEBUG(LOG_ERR, ("Secret for %s on %s is too long\n", client, server)); len = MAXSECRETLEN; } BCOPY(ppp_settings.passwd, secret, len); *secret_len = len; return 1; #else int ret = 0, len; struct wordlist *addrs; char secbuf[MAXWORDLEN]; addrs = NULL; secbuf[0] = 0; /* XXX Find secret. */ if (ret < 0) { return 0; } if (save_addrs) { set_allowed_addrs(unit, addrs); } len = strlen(secbuf); if (len > MAXSECRETLEN) { AUTHDEBUG(LOG_ERR, ("Secret for %s on %s is too long\n", client, server)); len = MAXSECRETLEN; } BCOPY(secbuf, secret, len); BZERO(secbuf, sizeof(secbuf)); *secret_len = len; return 1; #endif }
/* * LCP has terminated the link; go to the Dead phase and take the * physical layer down. */ void link_terminated(int unit) { AUTHDEBUG((LOG_INFO, "link_terminated: %d\n", unit)); if (lcp_phase[unit] == PHASE_DEAD) { return; } if (logged_in) { logout(); } lcp_phase[unit] = PHASE_DEAD; AUTHDEBUG((LOG_NOTICE, "Connection terminated.\n")); pppLinkTerminated(unit); }
/* * np_down - a network protocol has gone down. */ void np_down(int unit, u16_t proto) { AUTHDEBUG((LOG_INFO, "np_down: %d proto=%X\n", unit, proto)); if (--num_np_up == 0 && ppp_settings.idle_time_limit > 0) { UNTIMEOUT(check_idle, NULL); } }
/* * An Open on LCP has requested a change from Dead to Establish phase. * Do what's necessary to bring the physical layer up. */ void link_required(int unit) { LWIP_UNUSED_ARG(unit); AUTHDEBUG((LOG_INFO, "link_required: %d\n", unit)); }
/* * We have failed to authenticate ourselves to the peer using `protocol'. */ void auth_withpeer_fail(int unit, u16_t protocol) { int errCode = PPPERR_AUTHFAIL; LWIP_UNUSED_ARG(protocol); AUTHDEBUG((LOG_INFO, "auth_withpeer_fail: %d proto=%X\n", unit, protocol)); if (passwd_from_file) { BZERO(ppp_settings.passwd, MAXSECRETLEN); } /* * XXX Warning: the unit number indicates the interface which is * not necessarily the PPP connection. It works here as long * as we are only supporting PPP interfaces. */ pppIOCtl(unit, PPPCTLS_ERRCODE, &errCode); /* * We've failed to authenticate ourselves to our peer. * He'll probably take the link down, and there's not much * we can do except wait for that. */ lcp_close(unit, "Authentication failed"); }
/* * LCP has gone down; it will either die or try to re-establish. */ void link_down(int unit) { int i; struct protent *protp; AUTHDEBUG((LOG_INFO, "link_down: %d\n", unit)); if (did_authup) { /* XXX Do link down processing. */ did_authup = 0; } for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) { if (!protp->enabled_flag) { continue; } if (protp->protocol != PPP_LCP && protp->lowerdown != NULL) { (*protp->lowerdown)(unit); } if (protp->protocol < 0xC000 && protp->close != NULL) { (*protp->close)(unit, "LCP down"); } } num_np_open = 0; num_np_up = 0; if (lcp_phase[unit] != PHASE_DEAD) { lcp_phase[unit] = PHASE_TERMINATE; } pppLinkDown(unit); }
/* * connect_time_expired - log a message and close the connection. */ static void connect_time_expired(void *arg) { LWIP_UNUSED_ARG(arg); AUTHDEBUG((LOG_INFO, "Connect time expired\n")); lcp_close(0, "Connect time expired"); /* Close connection */ }
/* * The peer has failed to authenticate himself using `protocol'. */ void auth_peer_fail(int unit, u16_t protocol) { AUTHDEBUG((LOG_INFO, "auth_peer_fail: %d proto=%X\n", unit, protocol)); /* * Authentication failure: take the link down */ lcp_close(unit, "Authentication failed"); }
/* * np_finished - a network protocol has finished using the link. */ void np_finished(int unit, u16_t proto) { AUTHDEBUG((LOG_INFO, "np_finished: %d proto=%X\n", unit, proto)); if (--num_np_open <= 0) { /* no further use for the link: shut up shop. */ lcp_close(0, "No network protocols running"); } }
/* * np_down - a network protocol has gone down. */ void np_down(int unit, u16_t proto) { LWIP_UNUSED_ARG(unit); LWIP_UNUSED_ARG(proto); AUTHDEBUG(LOG_INFO, ("np_down: %d proto=%X\n", unit, proto)); if (--num_np_up == 0 && ppp_settings.idle_time_limit > 0) { UNTIMEOUT(check_idle, NULL); } }
/* * LCP has terminated the link; go to the Dead phase and take the * physical layer down. */ void link_terminated(int unit) { AUTHDEBUG((LOG_INFO, "link_terminated: %d\n", unit)); if (lcp_phase[unit] == PHASE_DEAD) return; if (logged_in) logout(); lcp_phase[unit] = PHASE_DEAD; ppp_trace(LOG_NOTICE, "Connection terminated.\n"); pppMainWakeup(unit); }
/* * check_idle - check whether the link has been idle for long * enough that we can shut it down. */ static void check_idle(void *arg) { struct ppp_idle idle; u_short itime; LWIP_UNUSED_ARG(arg); if (!get_idle_time(0, &idle)) { return; } itime = LWIP_MIN(idle.xmit_idle, idle.recv_idle); if (itime >= ppp_settings.idle_time_limit) { /* link is idle: shut it down. */ AUTHDEBUG((LOG_INFO, "Terminating connection due to lack of activity.\n")); lcp_close(0, "Link inactive"); } else { TIMEOUT(check_idle, NULL, ppp_settings.idle_time_limit - itime); } }
/* * auth_reset - called when LCP is starting negotiations to recheck * authentication options, i.e. whether we have appropriate secrets * to use for authenticating ourselves and/or the peer. */ void auth_reset(int unit) { lcp_options *go = &lcp_gotoptions[unit]; lcp_options *ao = &lcp_allowoptions[0]; ipcp_options *ipwo = &ipcp_wantoptions[0]; u32_t remote; AUTHDEBUG((LOG_INFO, "auth_reset: %d\n", unit)); ao->neg_upap = !ppp_settings.refuse_pap && (ppp_settings.passwd[0] != 0 || get_pap_passwd(unit, NULL, NULL)); ao->neg_chap = !ppp_settings.refuse_chap && have_chap_secret(ppp_settings.user, ppp_settings.remote_name, (u32_t)0); if (go->neg_upap && !have_pap_secret()) go->neg_upap = 0; if (go->neg_chap) { remote = ipwo->accept_remote? 0: ipwo->hisaddr; if (!have_chap_secret(ppp_settings.remote_name, ppp_settings.our_name, remote)) go->neg_chap = 0; } }
/* * We have failed to authenticate ourselves to the peer using `protocol'. */ void auth_withpeer_fail(int unit, u16_t protocol) { int errCode = PPPERR_AUTHFAIL; LWIP_UNUSED_ARG(protocol); AUTHDEBUG(LOG_INFO, ("auth_withpeer_fail: %d proto=%X\n", unit, protocol)); if (passwd_from_file) { BZERO(ppp_settings.passwd, MAXSECRETLEN); } /* * We've failed to authenticate ourselves to our peer. * He'll probably take the link down, and there's not much * we can do except wait for that. */ pppIOCtl(unit, PPPCTLS_ERRCODE, &errCode); lcp_close(unit, "Failed to authenticate ourselves to peer"); }
/* * check_passwd - Check the user name and passwd against the PAP secrets * file. If requested, also check against the system password database, * and login the user if OK. * * returns: * UPAP_AUTHNAK: Authentication failed. * UPAP_AUTHACK: Authentication succeeded. * In either case, msg points to an appropriate message. */ int check_passwd( int unit, char *auser, int userlen, char *apasswd, int passwdlen, char **msg, int *msglen) { #if 1 LWIP_UNUSED_ARG(unit); LWIP_UNUSED_ARG(auser); LWIP_UNUSED_ARG(userlen); LWIP_UNUSED_ARG(apasswd); LWIP_UNUSED_ARG(passwdlen); LWIP_UNUSED_ARG(msglen); *msg = (char *) 0; return UPAP_AUTHACK; /* XXX Assume all entries OK. */ #else int ret = 0; struct wordlist *addrs = NULL; char passwd[256], user[256]; char secret[MAXWORDLEN]; static u_short attempts = 0; /* * Make copies of apasswd and auser, then null-terminate them. */ BCOPY(apasswd, passwd, passwdlen); passwd[passwdlen] = '\0'; BCOPY(auser, user, userlen); user[userlen] = '\0'; *msg = (char *) 0; /* XXX Validate user name and password. */ ret = UPAP_AUTHACK; /* XXX Assume all entries OK. */ if (ret == UPAP_AUTHNAK) { if (*msg == (char *) 0) { *msg = "Login incorrect"; } *msglen = strlen(*msg); /* * Frustrate passwd stealer programs. * Allow 10 tries, but start backing off after 3 (stolen from login). * On 10'th, drop the connection. */ if (attempts++ >= 10) { AUTHDEBUG((LOG_WARNING, "%d LOGIN FAILURES BY %s\n", attempts, user)); /*ppp_panic("Excess Bad Logins");*/ } if (attempts > 3) { sys_msleep((attempts - 3) * 5); } if (addrs != NULL) { free_wordlist(addrs); } } else { attempts = 0; /* Reset count */ if (*msg == (char *) 0) { *msg = "Login ok"; } *msglen = strlen(*msg); set_allowed_addrs(unit, addrs); } BZERO(passwd, sizeof(passwd)); BZERO(secret, sizeof(secret)); return ret; #endif }
/* * The link is established. * Proceed to the Dead, Authenticate or Network phase as appropriate. */ void link_established(int unit) { int auth; int i; struct protent *protp; lcp_options *wo = &lcp_wantoptions[unit]; lcp_options *go = &lcp_gotoptions[unit]; #if PAP_SUPPORT || CHAP_SUPPORT lcp_options *ho = &lcp_hisoptions[unit]; #endif /* PAP_SUPPORT || CHAP_SUPPORT */ AUTHDEBUG((LOG_INFO, "link_established: %d\n", unit)); /* * Tell higher-level protocols that LCP is up. */ for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) { if (protp->protocol != PPP_LCP && protp->enabled_flag && protp->lowerup != NULL) { (*protp->lowerup)(unit); } } if (ppp_settings.auth_required && !(go->neg_chap || go->neg_upap)) { /* * We wanted the peer to authenticate itself, and it refused: * treat it as though it authenticated with PAP using a username * of "" and a password of "". If that's not OK, boot it out. */ if (!wo->neg_upap || !null_login(unit)) { AUTHDEBUG((LOG_WARNING, "peer refused to authenticate\n")); lcp_close(unit, "peer refused to authenticate"); return; } } lcp_phase[unit] = PHASE_AUTHENTICATE; auth = 0; #if CHAP_SUPPORT if (go->neg_chap) { ChapAuthPeer(unit, ppp_settings.our_name, go->chap_mdtype); auth |= CHAP_PEER; } #endif /* CHAP_SUPPORT */ #if PAP_SUPPORT && CHAP_SUPPORT else #endif /* PAP_SUPPORT && CHAP_SUPPORT */ #if PAP_SUPPORT if (go->neg_upap) { upap_authpeer(unit); auth |= PAP_PEER; } #endif /* PAP_SUPPORT */ #if CHAP_SUPPORT if (ho->neg_chap) { ChapAuthWithPeer(unit, ppp_settings.user, ho->chap_mdtype); auth |= CHAP_WITHPEER; } #endif /* CHAP_SUPPORT */ #if PAP_SUPPORT && CHAP_SUPPORT else #endif /* PAP_SUPPORT && CHAP_SUPPORT */ #if PAP_SUPPORT if (ho->neg_upap) { if (ppp_settings.passwd[0] == 0) { passwd_from_file = 1; if (!get_pap_passwd(unit, ppp_settings.user, ppp_settings.passwd)) { AUTHDEBUG((LOG_ERR, "No secret found for PAP login\n")); } } upap_authwithpeer(unit, ppp_settings.user, ppp_settings.passwd); auth |= PAP_WITHPEER; } #endif /* PAP_SUPPORT */ auth_pending[unit] = auth; if (!auth) { network_phase(unit); } }
/* * An Open on LCP has requested a change from Dead to Establish phase. * Do what's necessary to bring the physical layer up. */ void link_required(int unit) { AUTHDEBUG((LOG_INFO, "link_required: %d\n", unit)); }