2 * Synchronous PPP/Cisco/Frame Relay link level subroutines.
3 * Keepalive protocol implemented in both Cisco and PPP modes.
6 * Copyright (C) 1994-2000 Cronyx Engineering.
7 * Author: Serge Vakulenko, <vak@cronyx.ru>
9 * Heavily revamped to conform to RFC 1661.
10 * Copyright (C) 1997, 2001 Joerg Wunsch.
12 * This software is distributed with NO WARRANTIES, not even the implied
13 * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
15 * Authors grant any other persons or organisations permission to use
16 * or modify this software as long as this message is kept with the software,
17 * all derivative works or modified versions.
19 * From: Version 2.4, Thu Apr 30 17:17:21 MSD 1997
24 #include <sys/param.h>
27 #include "opt_inet6.h"
30 #include <sys/systm.h>
31 #include <sys/kernel.h>
32 #include <sys/module.h>
33 #include <sys/sockio.h>
34 #include <sys/socket.h>
35 #include <sys/syslog.h>
36 #include <sys/random.h>
37 #include <sys/malloc.h>
43 #include <net/netisr.h>
44 #include <net/if_types.h>
45 #include <net/route.h>
47 #include <netinet/in.h>
48 #include <netinet/in_systm.h>
49 #include <netinet/ip.h>
50 #include <net/slcompress.h>
52 #include <machine/stdarg.h>
54 #include <netinet/in_var.h>
57 #include <netinet/ip.h>
58 #include <netinet/tcp.h>
62 #include <netinet6/scope6_var.h>
65 #include <netinet/if_ether.h>
68 #include <netipx/ipx.h>
69 #include <netipx/ipx_if.h>
72 #include <net/if_sppp.h>
74 #define IOCTL_CMD_T u_long
75 #define MAXALIVECNT 3 /* max. alive packets */
78 * Interface flags that can be set in an ifconfig command.
80 * Setting link0 will make the link passive, i.e. it will be marked
81 * as being administrative openable, but won't be opened to begin
82 * with. Incoming calls will be answered, or subsequent calls with
83 * -link1 will cause the administrative open of the LCP layer.
85 * Setting link1 will cause the link to auto-dial only as packets
88 * Setting IFF_DEBUG will syslog the option negotiation and state
89 * transitions at level kern.debug. Note: all logs consistently look
92 * <if-name><unit>: <proto-name> <additional info...>
94 * with <if-name><unit> being something like "bppp0", and <proto-name>
95 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc.
98 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
99 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */
100 #define IFF_CISCO IFF_LINK2 /* auto-dial on output */
102 #define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
103 #define PPP_UI 0x03 /* Unnumbered Information */
104 #define PPP_IP 0x0021 /* Internet Protocol */
105 #define PPP_ISO 0x0023 /* ISO OSI Protocol */
106 #define PPP_XNS 0x0025 /* Xerox NS Protocol */
107 #define PPP_IPX 0x002b /* Novell IPX Protocol */
108 #define PPP_VJ_COMP 0x002d /* VJ compressed TCP/IP */
109 #define PPP_VJ_UCOMP 0x002f /* VJ uncompressed TCP/IP */
110 #define PPP_IPV6 0x0057 /* Internet Protocol Version 6 */
111 #define PPP_LCP 0xc021 /* Link Control Protocol */
112 #define PPP_PAP 0xc023 /* Password Authentication Protocol */
113 #define PPP_CHAP 0xc223 /* Challenge-Handshake Auth Protocol */
114 #define PPP_IPCP 0x8021 /* Internet Protocol Control Protocol */
115 #define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */
117 #define CONF_REQ 1 /* PPP configure request */
118 #define CONF_ACK 2 /* PPP configure acknowledge */
119 #define CONF_NAK 3 /* PPP configure negative ack */
120 #define CONF_REJ 4 /* PPP configure reject */
121 #define TERM_REQ 5 /* PPP terminate request */
122 #define TERM_ACK 6 /* PPP terminate acknowledge */
123 #define CODE_REJ 7 /* PPP code reject */
124 #define PROTO_REJ 8 /* PPP protocol reject */
125 #define ECHO_REQ 9 /* PPP echo request */
126 #define ECHO_REPLY 10 /* PPP echo reply */
127 #define DISC_REQ 11 /* PPP discard request */
129 #define LCP_OPT_MRU 1 /* maximum receive unit */
130 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */
131 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */
132 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */
133 #define LCP_OPT_MAGIC 5 /* magic number */
134 #define LCP_OPT_RESERVED 6 /* reserved */
135 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */
136 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */
138 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */
139 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol (VJ) */
140 #define IPCP_OPT_ADDRESS 3 /* local IP address */
142 #define IPV6CP_OPT_IFID 1 /* interface identifier */
143 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */
145 #define IPCP_COMP_VJ 0x2d /* Code for VJ compression */
147 #define PAP_REQ 1 /* PAP name/password request */
148 #define PAP_ACK 2 /* PAP acknowledge */
149 #define PAP_NAK 3 /* PAP fail */
151 #define CHAP_CHALLENGE 1 /* CHAP challenge request */
152 #define CHAP_RESPONSE 2 /* CHAP challenge response */
153 #define CHAP_SUCCESS 3 /* CHAP response ok */
154 #define CHAP_FAILURE 4 /* CHAP response failed */
156 #define CHAP_MD5 5 /* hash algorithm - MD5 */
158 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */
159 #define CISCO_UNICAST 0x0f /* Cisco unicast address */
160 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */
161 #define CISCO_ADDR_REQ 0 /* Cisco address request */
162 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */
163 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */
165 /* states are named and numbered according to RFC 1661 */
166 #define STATE_INITIAL 0
167 #define STATE_STARTING 1
168 #define STATE_CLOSED 2
169 #define STATE_STOPPED 3
170 #define STATE_CLOSING 4
171 #define STATE_STOPPING 5
172 #define STATE_REQ_SENT 6
173 #define STATE_ACK_RCVD 7
174 #define STATE_ACK_SENT 8
175 #define STATE_OPENED 9
177 static MALLOC_DEFINE(M_SPPP, "sppp", "synchronous PPP interface internals");
184 #define PPP_HEADER_LEN sizeof (struct ppp_header)
191 #define LCP_HEADER_LEN sizeof (struct lcp_header)
193 struct cisco_packet {
201 #define CISCO_PACKET_LEN sizeof (struct cisco_packet)
204 * We follow the spelling and capitalization of RFC 1661 here, to make
205 * it easier comparing with the standard. Please refer to this RFC in
206 * case you can't make sense out of these abbreviation; it will also
207 * explain the semantics related to the various events and actions.
210 u_short proto; /* PPP control protocol number */
211 u_char protoidx; /* index into state table in struct sppp */
213 #define CP_LCP 0x01 /* this is the LCP */
214 #define CP_AUTH 0x02 /* this is an authentication protocol */
215 #define CP_NCP 0x04 /* this is a NCP */
216 #define CP_QUAL 0x08 /* this is a quality reporting protocol */
217 const char *name; /* name of this control protocol */
219 void (*Up)(struct sppp *sp);
220 void (*Down)(struct sppp *sp);
221 void (*Open)(struct sppp *sp);
222 void (*Close)(struct sppp *sp);
223 void (*TO)(void *sp);
224 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len);
225 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len);
226 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len);
228 void (*tlu)(struct sppp *sp);
229 void (*tld)(struct sppp *sp);
230 void (*tls)(struct sppp *sp);
231 void (*tlf)(struct sppp *sp);
232 void (*scr)(struct sppp *sp);
235 #define SPP_FMT "%s: "
236 #define SPP_ARGS(ifp) (ifp)->if_xname
238 #define SPPP_LOCK(sp) mtx_lock (&(sp)->mtx)
239 #define SPPP_UNLOCK(sp) mtx_unlock (&(sp)->mtx)
240 #define SPPP_LOCK_ASSERT(sp) mtx_assert (&(sp)->mtx, MA_OWNED)
241 #define SPPP_LOCK_OWNED(sp) mtx_owned (&(sp)->mtx)
245 * The following disgusting hack gets around the problem that IP TOS
246 * can't be set yet. We want to put "interactive" traffic on a high
247 * priority queue. To decide if traffic is interactive, we check that
248 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control.
250 * XXX is this really still necessary? - joerg -
252 static const u_short interactive_ports[8] = {
256 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p))
259 /* almost every function needs these */
261 struct ifnet *ifp = SP2IFP(sp); \
262 int debug = ifp->if_flags & IFF_DEBUG
264 static int sppp_output(struct ifnet *ifp, struct mbuf *m,
265 const struct sockaddr *dst, struct route *ro);
267 static void sppp_cisco_send(struct sppp *sp, int type, long par1, long par2);
268 static void sppp_cisco_input(struct sppp *sp, struct mbuf *m);
270 static void sppp_cp_input(const struct cp *cp, struct sppp *sp,
272 static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type,
273 u_char ident, u_short len, void *data);
274 /* static void sppp_cp_timeout(void *arg); */
275 static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp,
277 static void sppp_auth_send(const struct cp *cp,
278 struct sppp *sp, unsigned int type, unsigned int id,
281 static void sppp_up_event(const struct cp *cp, struct sppp *sp);
282 static void sppp_down_event(const struct cp *cp, struct sppp *sp);
283 static void sppp_open_event(const struct cp *cp, struct sppp *sp);
284 static void sppp_close_event(const struct cp *cp, struct sppp *sp);
285 static void sppp_to_event(const struct cp *cp, struct sppp *sp);
287 static void sppp_null(struct sppp *sp);
289 static void sppp_pp_up(struct sppp *sp);
290 static void sppp_pp_down(struct sppp *sp);
292 static void sppp_lcp_init(struct sppp *sp);
293 static void sppp_lcp_up(struct sppp *sp);
294 static void sppp_lcp_down(struct sppp *sp);
295 static void sppp_lcp_open(struct sppp *sp);
296 static void sppp_lcp_close(struct sppp *sp);
297 static void sppp_lcp_TO(void *sp);
298 static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len);
299 static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
300 static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
301 static void sppp_lcp_tlu(struct sppp *sp);
302 static void sppp_lcp_tld(struct sppp *sp);
303 static void sppp_lcp_tls(struct sppp *sp);
304 static void sppp_lcp_tlf(struct sppp *sp);
305 static void sppp_lcp_scr(struct sppp *sp);
306 static void sppp_lcp_check_and_close(struct sppp *sp);
307 static int sppp_ncp_check(struct sppp *sp);
309 static void sppp_ipcp_init(struct sppp *sp);
310 static void sppp_ipcp_up(struct sppp *sp);
311 static void sppp_ipcp_down(struct sppp *sp);
312 static void sppp_ipcp_open(struct sppp *sp);
313 static void sppp_ipcp_close(struct sppp *sp);
314 static void sppp_ipcp_TO(void *sp);
315 static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len);
316 static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
317 static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
318 static void sppp_ipcp_tlu(struct sppp *sp);
319 static void sppp_ipcp_tld(struct sppp *sp);
320 static void sppp_ipcp_tls(struct sppp *sp);
321 static void sppp_ipcp_tlf(struct sppp *sp);
322 static void sppp_ipcp_scr(struct sppp *sp);
324 static void sppp_ipv6cp_init(struct sppp *sp);
325 static void sppp_ipv6cp_up(struct sppp *sp);
326 static void sppp_ipv6cp_down(struct sppp *sp);
327 static void sppp_ipv6cp_open(struct sppp *sp);
328 static void sppp_ipv6cp_close(struct sppp *sp);
329 static void sppp_ipv6cp_TO(void *sp);
330 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len);
331 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
332 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
333 static void sppp_ipv6cp_tlu(struct sppp *sp);
334 static void sppp_ipv6cp_tld(struct sppp *sp);
335 static void sppp_ipv6cp_tls(struct sppp *sp);
336 static void sppp_ipv6cp_tlf(struct sppp *sp);
337 static void sppp_ipv6cp_scr(struct sppp *sp);
339 static void sppp_pap_input(struct sppp *sp, struct mbuf *m);
340 static void sppp_pap_init(struct sppp *sp);
341 static void sppp_pap_open(struct sppp *sp);
342 static void sppp_pap_close(struct sppp *sp);
343 static void sppp_pap_TO(void *sp);
344 static void sppp_pap_my_TO(void *sp);
345 static void sppp_pap_tlu(struct sppp *sp);
346 static void sppp_pap_tld(struct sppp *sp);
347 static void sppp_pap_scr(struct sppp *sp);
349 static void sppp_chap_input(struct sppp *sp, struct mbuf *m);
350 static void sppp_chap_init(struct sppp *sp);
351 static void sppp_chap_open(struct sppp *sp);
352 static void sppp_chap_close(struct sppp *sp);
353 static void sppp_chap_TO(void *sp);
354 static void sppp_chap_tlu(struct sppp *sp);
355 static void sppp_chap_tld(struct sppp *sp);
356 static void sppp_chap_scr(struct sppp *sp);
358 static const char *sppp_auth_type_name(u_short proto, u_char type);
359 static const char *sppp_cp_type_name(u_char type);
361 static const char *sppp_dotted_quad(u_long addr);
362 static const char *sppp_ipcp_opt_name(u_char opt);
365 static const char *sppp_ipv6cp_opt_name(u_char opt);
367 static const char *sppp_lcp_opt_name(u_char opt);
368 static const char *sppp_phase_name(enum ppp_phase phase);
369 static const char *sppp_proto_name(u_short proto);
370 static const char *sppp_state_name(int state);
371 static int sppp_params(struct sppp *sp, u_long cmd, void *data);
372 static int sppp_strnlen(u_char *p, int max);
373 static void sppp_keepalive(void *dummy);
374 static void sppp_phase_network(struct sppp *sp);
375 static void sppp_print_bytes(const u_char *p, u_short len);
376 static void sppp_print_string(const char *p, u_short len);
377 static void sppp_qflush(struct ifqueue *ifq);
379 static void sppp_set_ip_addr(struct sppp *sp, u_long src);
382 static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src,
383 struct in6_addr *dst, struct in6_addr *srcmask);
384 #ifdef IPV6CP_MYIFID_DYN
385 static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src);
386 static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src);
388 static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src);
391 /* if_start () wrapper */
392 static void sppp_ifstart (struct ifnet *ifp);
394 /* our control protocol descriptors */
395 static const struct cp lcp = {
396 PPP_LCP, IDX_LCP, CP_LCP, "lcp",
397 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close,
398 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak,
399 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf,
403 static const struct cp ipcp = {
405 #ifdef INET /* don't run IPCP if there's no IPv4 support */
411 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close,
412 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak,
413 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf,
417 static const struct cp ipv6cp = {
418 PPP_IPV6CP, IDX_IPV6CP,
419 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/
425 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close,
426 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak,
427 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf,
431 static const struct cp pap = {
432 PPP_PAP, IDX_PAP, CP_AUTH, "pap",
433 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close,
434 sppp_pap_TO, 0, 0, 0,
435 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null,
439 static const struct cp chap = {
440 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap",
441 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close,
442 sppp_chap_TO, 0, 0, 0,
443 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null,
447 static const struct cp *cps[IDX_COUNT] = {
449 &ipcp, /* IDX_IPCP */
450 &ipv6cp, /* IDX_IPV6CP */
452 &chap, /* IDX_CHAP */
456 sppp_alloc(u_char type, struct ifnet *ifp)
460 sp = malloc(sizeof(struct sppp), M_SPPP, M_WAITOK | M_ZERO);
467 sppp_free(void *com, u_char type)
474 sppp_modevent(module_t mod, int type, void *unused)
479 * XXX: should probably be IFT_SPPP, but it's fairly
480 * harmless to allocate struct sppp's for non-sppp
484 if_register_com_alloc(IFT_PPP, sppp_alloc, sppp_free);
487 /* if_deregister_com_alloc(IFT_PPP); */
494 static moduledata_t spppmod = {
499 MODULE_VERSION(sppp, 1);
500 DECLARE_MODULE(sppp, spppmod, SI_SUB_DRIVERS, SI_ORDER_ANY);
503 * Exported functions, comprising our interface to the lower layer.
507 * Process the received packet.
510 sppp_input(struct ifnet *ifp, struct mbuf *m)
512 struct ppp_header *h;
514 struct sppp *sp = IFP2SP(ifp);
515 int debug, do_account = 0;
522 debug = ifp->if_flags & IFF_DEBUG;
524 if (ifp->if_flags & IFF_UP)
525 /* Count received bytes, add FCS and one flag */
526 ifp->if_ibytes += m->m_pkthdr.len + 3;
528 if (m->m_pkthdr.len <= PPP_HEADER_LEN) {
529 /* Too small packet, drop it. */
532 SPP_FMT "input packet is too small, %d bytes\n",
533 SPP_ARGS(ifp), m->m_pkthdr.len);
543 if (sp->pp_mode == PP_FR) {
544 sppp_fr_input (sp, m);
549 /* Get PPP header. */
550 h = mtod (m, struct ppp_header*);
551 m_adj (m, PPP_HEADER_LEN);
553 switch (h->address) {
554 case PPP_ALLSTATIONS:
555 if (h->control != PPP_UI)
557 if (sp->pp_mode == IFF_CISCO) {
560 SPP_FMT "PPP packet in Cisco mode "
561 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
563 h->address, h->control, ntohs(h->protocol));
566 switch (ntohs (h->protocol)) {
570 SPP_FMT "rejecting protocol "
571 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
573 h->address, h->control, ntohs(h->protocol));
574 if (sp->state[IDX_LCP] == STATE_OPENED)
575 sppp_cp_send (sp, PPP_LCP, PROTO_REJ,
576 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2,
581 sppp_cp_input(&lcp, sp, m);
586 if (sp->pp_phase >= PHASE_AUTHENTICATE)
587 sppp_pap_input(sp, m);
592 if (sp->pp_phase >= PHASE_AUTHENTICATE)
593 sppp_chap_input(sp, m);
599 if (sp->pp_phase == PHASE_NETWORK)
600 sppp_cp_input(&ipcp, sp, m);
605 if (sp->state[IDX_IPCP] == STATE_OPENED) {
611 if (sp->state[IDX_IPCP] == STATE_OPENED) {
613 sl_uncompress_tcp_core(mtod(m, u_char *),
617 &iphdr, &hlen)) <= 0) {
620 SPP_FMT "VJ uncompress failed on compressed packet\n",
626 * Trim the VJ header off the packet, and prepend
627 * the uncompressed IP header (which will usually
628 * end up in two chained mbufs since there's not
629 * enough leading space in the existing mbuf).
632 M_PREPEND(m, hlen, M_NOWAIT);
637 bcopy(iphdr, mtod(m, u_char *), hlen);
643 if (sp->state[IDX_IPCP] == STATE_OPENED) {
644 if (sl_uncompress_tcp_core(mtod(m, u_char *),
646 TYPE_UNCOMPRESSED_TCP,
648 &iphdr, &hlen) != 0) {
651 SPP_FMT "VJ uncompress failed on uncompressed packet\n",
662 if (sp->pp_phase == PHASE_NETWORK)
663 sppp_cp_input(&ipv6cp, sp, m);
669 if (sp->state[IDX_IPV6CP] == STATE_OPENED)
676 /* IPX IPXCP not implemented yet */
677 if (sp->pp_phase == PHASE_NETWORK)
684 case CISCO_MULTICAST:
686 /* Don't check the control field here (RFC 1547). */
687 if (sp->pp_mode != IFF_CISCO) {
690 SPP_FMT "Cisco packet in PPP mode "
691 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
693 h->address, h->control, ntohs(h->protocol));
696 switch (ntohs (h->protocol)) {
700 case CISCO_KEEPALIVE:
701 sppp_cisco_input (sp, m);
725 default: /* Invalid PPP packet. */
729 SPP_FMT "invalid input packet "
730 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
732 h->address, h->control, ntohs(h->protocol));
736 if (! (ifp->if_flags & IFF_UP) || isr == -1)
740 M_SETFIB(m, ifp->if_fib);
742 if (netisr_queue(isr, m)) { /* (0) on success. */
744 log(LOG_DEBUG, SPP_FMT "protocol queue overflow\n",
751 * Do only account for network packets, not for control
752 * packets. This is used by some subsystems to detect
755 sp->pp_last_recv = time_uptime;
759 sppp_ifstart_sched(void *dummy)
761 struct sppp *sp = dummy;
763 sp->if_start(SP2IFP(sp));
766 /* if_start () wrapper function. We use it to schedule real if_start () for
767 * execution. We can't call it directly
770 sppp_ifstart(struct ifnet *ifp)
772 struct sppp *sp = IFP2SP(ifp);
774 if (SPPP_LOCK_OWNED(sp)) {
775 if (callout_pending(&sp->ifstart_callout))
777 callout_reset(&sp->ifstart_callout, 1, sppp_ifstart_sched,
785 * Enqueue transmit packet.
788 sppp_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
791 struct sppp *sp = IFP2SP(ifp);
792 struct ppp_header *h;
793 struct ifqueue *ifq = NULL;
796 int ipproto = PPP_IP;
798 int debug = ifp->if_flags & IFF_DEBUG;
802 if (!(ifp->if_flags & IFF_UP) ||
803 (!(ifp->if_flags & IFF_AUTO) &&
804 !(ifp->if_drv_flags & IFF_DRV_RUNNING))) {
813 if ((ifp->if_flags & IFF_AUTO) &&
814 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
819 * Hack to prevent the initialization-time generated
820 * IPv6 multicast packet to erroneously cause a
821 * dialout event in case IPv6 has been
822 * administratively disabled on that interface.
824 if (dst->sa_family == AF_INET6 &&
825 !(sp->confflags & CONF_ENABLE_IPV6))
829 * Interface is not yet running, but auto-dial. Need
830 * to start LCP for it.
832 ifp->if_drv_flags |= IFF_DRV_RUNNING;
837 if (dst->sa_family == AF_INET) {
838 /* XXX Check mbuf length here? */
839 struct ip *ip = mtod (m, struct ip*);
840 struct tcphdr *tcp = (struct tcphdr*) ((long*)ip + ip->ip_hl);
843 * When using dynamic local IP address assignment by using
844 * 0.0.0.0 as a local address, the first TCP session will
845 * not connect because the local TCP checksum is computed
846 * using 0.0.0.0 which will later become our real IP address
847 * so the TCP checksum computed at the remote end will
848 * become invalid. So we
849 * - don't let packets with src ip addr 0 thru
850 * - we flag TCP packets with src ip 0 as an error
853 if(ip->ip_src.s_addr == INADDR_ANY) /* -hm */
857 if(ip->ip_p == IPPROTO_TCP)
858 return(EADDRNOTAVAIL);
864 * Put low delay, telnet, rlogin and ftp control packets
865 * in front of the queue or let ALTQ take care.
867 if (ALTQ_IS_ENABLED(&ifp->if_snd))
869 else if (_IF_QFULL(&sp->pp_fastq))
871 else if (ip->ip_tos & IPTOS_LOWDELAY)
873 else if (m->m_len < sizeof *ip + sizeof *tcp)
875 else if (ip->ip_p != IPPROTO_TCP)
877 else if (INTERACTIVE (ntohs (tcp->th_sport)))
879 else if (INTERACTIVE (ntohs (tcp->th_dport)))
883 * Do IP Header compression
885 if (sp->pp_mode != IFF_CISCO && sp->pp_mode != PP_FR &&
886 (sp->ipcp.flags & IPCP_VJ) && ip->ip_p == IPPROTO_TCP)
887 switch (sl_compress_tcp(m, ip, sp->pp_comp,
888 sp->ipcp.compress_cid)) {
889 case TYPE_COMPRESSED_TCP:
890 ipproto = PPP_VJ_COMP;
892 case TYPE_UNCOMPRESSED_TCP:
893 ipproto = PPP_VJ_UCOMP;
907 if (dst->sa_family == AF_INET6) {
908 /* XXX do something tricky here? */
912 if (sp->pp_mode == PP_FR) {
913 /* Add frame relay header. */
914 m = sppp_fr_header (sp, m, dst->sa_family);
921 * Prepend general data packet PPP header. For now, IP only.
923 M_PREPEND (m, PPP_HEADER_LEN, M_NOWAIT);
926 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n",
933 * May want to check size of packet
934 * (albeit due to the implementation it's always enough)
936 h = mtod (m, struct ppp_header*);
937 if (sp->pp_mode == IFF_CISCO) {
938 h->address = CISCO_UNICAST; /* unicast address */
941 h->address = PPP_ALLSTATIONS; /* broadcast address */
942 h->control = PPP_UI; /* Unnumbered Info */
945 switch (dst->sa_family) {
947 case AF_INET: /* Internet Protocol */
948 if (sp->pp_mode == IFF_CISCO)
949 h->protocol = htons (ETHERTYPE_IP);
952 * Don't choke with an ENETDOWN early. It's
953 * possible that we just started dialing out,
954 * so don't drop the packet immediately. If
955 * we notice that we run out of buffer space
956 * below, we will however remember that we are
957 * not ready to carry IP packets, and return
958 * ENETDOWN, as opposed to ENOBUFS.
960 h->protocol = htons(ipproto);
961 if (sp->state[IDX_IPCP] != STATE_OPENED)
967 case AF_INET6: /* Internet Protocol */
968 if (sp->pp_mode == IFF_CISCO)
969 h->protocol = htons (ETHERTYPE_IPV6);
972 * Don't choke with an ENETDOWN early. It's
973 * possible that we just started dialing out,
974 * so don't drop the packet immediately. If
975 * we notice that we run out of buffer space
976 * below, we will however remember that we are
977 * not ready to carry IP packets, and return
978 * ENETDOWN, as opposed to ENOBUFS.
980 h->protocol = htons(PPP_IPV6);
981 if (sp->state[IDX_IPV6CP] != STATE_OPENED)
987 case AF_IPX: /* Novell IPX Protocol */
988 h->protocol = htons (sp->pp_mode == IFF_CISCO ?
989 ETHERTYPE_IPX : PPP_IPX);
996 return (EAFNOSUPPORT);
1000 * Queue message on interface, and start output if interface
1005 error = !(IF_HANDOFF_ADJ(ifq, m, ifp, 3));
1007 IFQ_HANDOFF_ADJ(ifp, m, 3, error);
1011 return (rv? rv: ENOBUFS);
1015 * Unlike in sppp_input(), we can always bump the timestamp
1016 * here since sppp_output() is only called on behalf of
1017 * network-layer traffic; control-layer traffic is handled
1018 * by sppp_cp_send().
1020 sp->pp_last_sent = time_uptime;
1025 sppp_attach(struct ifnet *ifp)
1027 struct sppp *sp = IFP2SP(ifp);
1029 /* Initialize mtx lock */
1030 mtx_init(&sp->mtx, "sppp", MTX_NETWORK_LOCK, MTX_DEF | MTX_RECURSE);
1032 /* Initialize keepalive handler. */
1033 callout_init(&sp->keepalive_callout, CALLOUT_MPSAFE);
1034 callout_reset(&sp->keepalive_callout, hz * 10, sppp_keepalive,
1037 ifp->if_mtu = PP_MTU;
1038 ifp->if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
1039 ifp->if_output = sppp_output;
1041 sp->pp_flags = PP_KEEPALIVE;
1043 ifp->if_snd.ifq_maxlen = 32;
1044 sp->pp_fastq.ifq_maxlen = 32;
1045 sp->pp_cpq.ifq_maxlen = 20;
1047 sp->pp_alivecnt = 0;
1048 bzero(&sp->pp_seq[0], sizeof(sp->pp_seq));
1049 bzero(&sp->pp_rseq[0], sizeof(sp->pp_rseq));
1050 sp->pp_phase = PHASE_DEAD;
1051 sp->pp_up = sppp_pp_up;
1052 sp->pp_down = sppp_pp_down;
1053 if(!mtx_initialized(&sp->pp_cpq.ifq_mtx))
1054 mtx_init(&sp->pp_cpq.ifq_mtx, "sppp_cpq", NULL, MTX_DEF);
1055 if(!mtx_initialized(&sp->pp_fastq.ifq_mtx))
1056 mtx_init(&sp->pp_fastq.ifq_mtx, "sppp_fastq", NULL, MTX_DEF);
1057 sp->pp_last_recv = sp->pp_last_sent = time_uptime;
1060 sp->confflags |= CONF_ENABLE_VJ;
1063 sp->confflags |= CONF_ENABLE_IPV6;
1065 callout_init(&sp->ifstart_callout, CALLOUT_MPSAFE);
1066 sp->if_start = ifp->if_start;
1067 ifp->if_start = sppp_ifstart;
1068 sp->pp_comp = malloc(sizeof(struct slcompress), M_TEMP, M_WAITOK);
1069 sl_compress_init(sp->pp_comp, -1);
1072 sppp_ipv6cp_init(sp);
1078 sppp_detach(struct ifnet *ifp)
1080 struct sppp *sp = IFP2SP(ifp);
1083 KASSERT(mtx_initialized(&sp->mtx), ("sppp mutex is not initialized"));
1085 /* Stop keepalive handler. */
1086 if (!callout_drain(&sp->keepalive_callout))
1087 callout_stop(&sp->keepalive_callout);
1089 for (i = 0; i < IDX_COUNT; i++) {
1090 if (!callout_drain(&sp->ch[i]))
1091 callout_stop(&sp->ch[i]);
1093 if (!callout_drain(&sp->pap_my_to_ch))
1094 callout_stop(&sp->pap_my_to_ch);
1095 mtx_destroy(&sp->pp_cpq.ifq_mtx);
1096 mtx_destroy(&sp->pp_fastq.ifq_mtx);
1097 mtx_destroy(&sp->mtx);
1101 * Flush the interface output queue.
1104 sppp_flush_unlocked(struct ifnet *ifp)
1106 struct sppp *sp = IFP2SP(ifp);
1108 sppp_qflush ((struct ifqueue *)&SP2IFP(sp)->if_snd);
1109 sppp_qflush (&sp->pp_fastq);
1110 sppp_qflush (&sp->pp_cpq);
1114 sppp_flush(struct ifnet *ifp)
1116 struct sppp *sp = IFP2SP(ifp);
1119 sppp_flush_unlocked (ifp);
1124 * Check if the output queue is empty.
1127 sppp_isempty(struct ifnet *ifp)
1129 struct sppp *sp = IFP2SP(ifp);
1133 empty = !sp->pp_fastq.ifq_head && !sp->pp_cpq.ifq_head &&
1134 !SP2IFP(sp)->if_snd.ifq_head;
1140 * Get next packet to send.
1143 sppp_dequeue(struct ifnet *ifp)
1145 struct sppp *sp = IFP2SP(ifp);
1150 * Process only the control protocol queue until we have at
1151 * least one NCP open.
1153 * Do always serve all three queues in Cisco mode.
1155 IF_DEQUEUE(&sp->pp_cpq, m);
1157 (sppp_ncp_check(sp) || sp->pp_mode == IFF_CISCO ||
1158 sp->pp_mode == PP_FR)) {
1159 IF_DEQUEUE(&sp->pp_fastq, m);
1161 IF_DEQUEUE (&SP2IFP(sp)->if_snd, m);
1168 * Pick the next packet, do not remove it from the queue.
1171 sppp_pick(struct ifnet *ifp)
1173 struct sppp *sp = IFP2SP(ifp);
1178 m = sp->pp_cpq.ifq_head;
1180 (sp->pp_phase == PHASE_NETWORK ||
1181 sp->pp_mode == IFF_CISCO ||
1182 sp->pp_mode == PP_FR))
1183 if ((m = sp->pp_fastq.ifq_head) == NULL)
1184 m = SP2IFP(sp)->if_snd.ifq_head;
1190 * Process an ioctl request. Called on low priority level.
1193 sppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, void *data)
1195 struct ifreq *ifr = (struct ifreq*) data;
1196 struct sppp *sp = IFP2SP(ifp);
1197 int rv, going_up, going_down, newmode;
1206 /* set the interface "up" when assigning an IP address */
1207 ifp->if_flags |= IFF_UP;
1211 going_up = ifp->if_flags & IFF_UP &&
1212 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0;
1213 going_down = (ifp->if_flags & IFF_UP) == 0 &&
1214 ifp->if_drv_flags & IFF_DRV_RUNNING;
1216 newmode = ifp->if_flags & IFF_PASSIVE;
1218 newmode = ifp->if_flags & IFF_AUTO;
1220 newmode = ifp->if_flags & IFF_CISCO;
1221 ifp->if_flags &= ~(IFF_PASSIVE | IFF_AUTO | IFF_CISCO);
1222 ifp->if_flags |= newmode;
1225 newmode = sp->pp_flags & PP_FR;
1227 if (newmode != sp->pp_mode) {
1230 going_up = ifp->if_drv_flags & IFF_DRV_RUNNING;
1234 if (sp->pp_mode != IFF_CISCO &&
1235 sp->pp_mode != PP_FR)
1237 else if (sp->pp_tlf)
1239 sppp_flush_unlocked(ifp);
1240 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1241 sp->pp_mode = newmode;
1245 if (sp->pp_mode != IFF_CISCO &&
1246 sp->pp_mode != PP_FR)
1248 sp->pp_mode = newmode;
1249 if (sp->pp_mode == 0) {
1250 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1253 if ((sp->pp_mode == IFF_CISCO) ||
1254 (sp->pp_mode == PP_FR)) {
1257 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1265 #define ifr_mtu ifr_metric
1268 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru)
1270 ifp->if_mtu = ifr->ifr_mtu;
1275 if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru)
1277 ifp->if_mtu = *(short*)data;
1282 ifr->ifr_mtu = ifp->if_mtu;
1287 *(short*)data = ifp->if_mtu;
1294 case SIOCGIFGENERIC:
1295 case SIOCSIFGENERIC:
1296 rv = sppp_params(sp, cmd, data);
1307 * Cisco framing implementation.
1311 * Handle incoming Cisco keepalive protocol packets.
1314 sppp_cisco_input(struct sppp *sp, struct mbuf *m)
1317 struct cisco_packet *h;
1320 if (m->m_pkthdr.len < CISCO_PACKET_LEN) {
1323 SPP_FMT "cisco invalid packet length: %d bytes\n",
1324 SPP_ARGS(ifp), m->m_pkthdr.len);
1327 h = mtod (m, struct cisco_packet*);
1330 SPP_FMT "cisco input: %d bytes "
1331 "<0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
1332 SPP_ARGS(ifp), m->m_pkthdr.len,
1333 (u_long)ntohl (h->type), (u_long)h->par1, (u_long)h->par2, (u_int)h->rel,
1334 (u_int)h->time0, (u_int)h->time1);
1335 switch (ntohl (h->type)) {
1338 log(-1, SPP_FMT "cisco unknown packet type: 0x%lx\n",
1339 SPP_ARGS(ifp), (u_long)ntohl (h->type));
1341 case CISCO_ADDR_REPLY:
1342 /* Reply on address request, ignore */
1344 case CISCO_KEEPALIVE_REQ:
1345 sp->pp_alivecnt = 0;
1346 sp->pp_rseq[IDX_LCP] = ntohl (h->par1);
1347 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) {
1348 /* Local and remote sequence numbers are equal.
1349 * Probably, the line is in loopback mode. */
1350 if (sp->pp_loopcnt >= MAXALIVECNT) {
1351 printf (SPP_FMT "loopback\n",
1354 if (ifp->if_flags & IFF_UP) {
1356 sppp_qflush (&sp->pp_cpq);
1361 /* Generate new local sequence number */
1362 sp->pp_seq[IDX_LCP] = random();
1366 if (! (ifp->if_flags & IFF_UP) &&
1367 (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1369 printf (SPP_FMT "up\n", SPP_ARGS(ifp));
1372 case CISCO_ADDR_REQ:
1373 sppp_get_ip_addrs(sp, &me, 0, &mymask);
1375 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask);
1381 * Send Cisco keepalive packet.
1384 sppp_cisco_send(struct sppp *sp, int type, long par1, long par2)
1387 struct ppp_header *h;
1388 struct cisco_packet *ch;
1392 getmicrouptime(&tv);
1394 MGETHDR (m, M_NOWAIT, MT_DATA);
1397 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN;
1398 m->m_pkthdr.rcvif = 0;
1400 h = mtod (m, struct ppp_header*);
1401 h->address = CISCO_MULTICAST;
1403 h->protocol = htons (CISCO_KEEPALIVE);
1405 ch = (struct cisco_packet*) (h + 1);
1406 ch->type = htonl (type);
1407 ch->par1 = htonl (par1);
1408 ch->par2 = htonl (par2);
1411 ch->time0 = htons ((u_short) (tv.tv_sec >> 16));
1412 ch->time1 = htons ((u_short) tv.tv_sec);
1416 SPP_FMT "cisco output: <0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
1417 SPP_ARGS(ifp), (u_long)ntohl (ch->type), (u_long)ch->par1,
1418 (u_long)ch->par2, (u_int)ch->rel, (u_int)ch->time0, (u_int)ch->time1);
1420 if (! IF_HANDOFF_ADJ(&sp->pp_cpq, m, ifp, 3))
1425 * PPP protocol implementation.
1429 * Send PPP control protocol packet.
1432 sppp_cp_send(struct sppp *sp, u_short proto, u_char type,
1433 u_char ident, u_short len, void *data)
1436 struct ppp_header *h;
1437 struct lcp_header *lh;
1440 if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN)
1441 len = MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN;
1442 MGETHDR (m, M_NOWAIT, MT_DATA);
1445 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
1446 m->m_pkthdr.rcvif = 0;
1448 h = mtod (m, struct ppp_header*);
1449 h->address = PPP_ALLSTATIONS; /* broadcast address */
1450 h->control = PPP_UI; /* Unnumbered Info */
1451 h->protocol = htons (proto); /* Link Control Protocol */
1453 lh = (struct lcp_header*) (h + 1);
1456 lh->len = htons (LCP_HEADER_LEN + len);
1458 bcopy (data, lh+1, len);
1461 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
1463 sppp_proto_name(proto),
1464 sppp_cp_type_name (lh->type), lh->ident,
1466 sppp_print_bytes ((u_char*) (lh+1), len);
1469 if (! IF_HANDOFF_ADJ(&sp->pp_cpq, m, ifp, 3))
1474 * Handle incoming PPP control protocol packets.
1477 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m)
1480 struct lcp_header *h;
1481 int len = m->m_pkthdr.len;
1488 SPP_FMT "%s invalid packet length: %d bytes\n",
1489 SPP_ARGS(ifp), cp->name, len);
1492 h = mtod (m, struct lcp_header*);
1495 SPP_FMT "%s input(%s): <%s id=0x%x len=%d",
1496 SPP_ARGS(ifp), cp->name,
1497 sppp_state_name(sp->state[cp->protoidx]),
1498 sppp_cp_type_name (h->type), h->ident, ntohs (h->len));
1499 sppp_print_bytes ((u_char*) (h+1), len-4);
1502 if (len > ntohs (h->len))
1503 len = ntohs (h->len);
1504 p = (u_char *)(h + 1);
1509 log(-1, SPP_FMT "%s invalid conf-req length %d\n",
1510 SPP_ARGS(ifp), cp->name,
1515 /* handle states where RCR doesn't get a SCA/SCN */
1516 switch (sp->state[cp->protoidx]) {
1518 case STATE_STOPPING:
1521 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident,
1525 rv = (cp->RCR)(sp, h, len);
1526 switch (sp->state[cp->protoidx]) {
1531 case STATE_ACK_SENT:
1532 case STATE_REQ_SENT:
1534 * sppp_cp_change_state() have the side effect of
1535 * restarting the timeouts. We want to avoid that
1536 * if the state don't change, otherwise we won't
1537 * ever timeout and resend a configuration request
1540 if (sp->state[cp->protoidx] == (rv ? STATE_ACK_SENT:
1543 sppp_cp_change_state(cp, sp, rv?
1544 STATE_ACK_SENT: STATE_REQ_SENT);
1547 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1549 sppp_cp_change_state(cp, sp, rv?
1550 STATE_ACK_SENT: STATE_REQ_SENT);
1552 case STATE_ACK_RCVD:
1554 sppp_cp_change_state(cp, sp, STATE_OPENED);
1556 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
1561 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1564 printf(SPP_FMT "%s illegal %s in state %s\n",
1565 SPP_ARGS(ifp), cp->name,
1566 sppp_cp_type_name(h->type),
1567 sppp_state_name(sp->state[cp->protoidx]));
1572 if (h->ident != sp->confid[cp->protoidx]) {
1574 log(-1, SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
1575 SPP_ARGS(ifp), cp->name,
1576 h->ident, sp->confid[cp->protoidx]);
1580 switch (sp->state[cp->protoidx]) {
1583 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1586 case STATE_STOPPING:
1588 case STATE_REQ_SENT:
1589 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1590 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1595 case STATE_ACK_RCVD:
1597 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1599 case STATE_ACK_SENT:
1600 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1601 sppp_cp_change_state(cp, sp, STATE_OPENED);
1603 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
1604 SPP_ARGS(ifp), cp->name);
1608 printf(SPP_FMT "%s illegal %s in state %s\n",
1609 SPP_ARGS(ifp), cp->name,
1610 sppp_cp_type_name(h->type),
1611 sppp_state_name(sp->state[cp->protoidx]));
1617 if (h->ident != sp->confid[cp->protoidx]) {
1619 log(-1, SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
1620 SPP_ARGS(ifp), cp->name,
1621 h->ident, sp->confid[cp->protoidx]);
1625 if (h->type == CONF_NAK)
1626 (cp->RCN_nak)(sp, h, len);
1628 (cp->RCN_rej)(sp, h, len);
1630 switch (sp->state[cp->protoidx]) {
1633 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1635 case STATE_REQ_SENT:
1636 case STATE_ACK_SENT:
1637 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1639 * Slow things down a bit if we think we might be
1640 * in loopback. Depend on the timeout to send the
1641 * next configuration request.
1650 case STATE_ACK_RCVD:
1651 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1655 case STATE_STOPPING:
1658 printf(SPP_FMT "%s illegal %s in state %s\n",
1659 SPP_ARGS(ifp), cp->name,
1660 sppp_cp_type_name(h->type),
1661 sppp_state_name(sp->state[cp->protoidx]));
1667 switch (sp->state[cp->protoidx]) {
1668 case STATE_ACK_RCVD:
1669 case STATE_ACK_SENT:
1670 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1675 case STATE_STOPPING:
1676 case STATE_REQ_SENT:
1678 /* Send Terminate-Ack packet. */
1680 log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n",
1681 SPP_ARGS(ifp), cp->name);
1682 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1686 sp->rst_counter[cp->protoidx] = 0;
1687 sppp_cp_change_state(cp, sp, STATE_STOPPING);
1691 printf(SPP_FMT "%s illegal %s in state %s\n",
1692 SPP_ARGS(ifp), cp->name,
1693 sppp_cp_type_name(h->type),
1694 sppp_state_name(sp->state[cp->protoidx]));
1699 switch (sp->state[cp->protoidx]) {
1702 case STATE_REQ_SENT:
1703 case STATE_ACK_SENT:
1706 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1709 case STATE_STOPPING:
1710 sppp_cp_change_state(cp, sp, STATE_STOPPED);
1713 case STATE_ACK_RCVD:
1714 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1719 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1722 printf(SPP_FMT "%s illegal %s in state %s\n",
1723 SPP_ARGS(ifp), cp->name,
1724 sppp_cp_type_name(h->type),
1725 sppp_state_name(sp->state[cp->protoidx]));
1730 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
1732 SPP_FMT "%s: ignoring RXJ (%s) for proto 0x%x, "
1733 "danger will robinson\n",
1734 SPP_ARGS(ifp), cp->name,
1735 sppp_cp_type_name(h->type), ntohs(*((u_short *)p)));
1736 switch (sp->state[cp->protoidx]) {
1739 case STATE_REQ_SENT:
1740 case STATE_ACK_SENT:
1742 case STATE_STOPPING:
1745 case STATE_ACK_RCVD:
1746 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1749 printf(SPP_FMT "%s illegal %s in state %s\n",
1750 SPP_ARGS(ifp), cp->name,
1751 sppp_cp_type_name(h->type),
1752 sppp_state_name(sp->state[cp->protoidx]));
1759 const struct cp *upper;
1765 proto = ntohs(*((u_int16_t *)p));
1766 for (i = 0; i < IDX_COUNT; i++) {
1767 if (cps[i]->proto == proto) {
1775 if (catastrophic || debug)
1776 log(catastrophic? LOG_INFO: LOG_DEBUG,
1777 SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n",
1778 SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+',
1779 sppp_cp_type_name(h->type), proto,
1780 upper ? upper->name : "unknown",
1781 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?");
1784 * if we got RXJ+ against conf-req, the peer does not implement
1785 * this particular protocol type. terminate the protocol.
1787 if (upper && !catastrophic) {
1788 if (sp->state[upper->protoidx] == STATE_REQ_SENT) {
1794 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
1795 switch (sp->state[cp->protoidx]) {
1798 case STATE_REQ_SENT:
1799 case STATE_ACK_SENT:
1801 case STATE_STOPPING:
1804 case STATE_ACK_RCVD:
1805 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1808 printf(SPP_FMT "%s illegal %s in state %s\n",
1809 SPP_ARGS(ifp), cp->name,
1810 sppp_cp_type_name(h->type),
1811 sppp_state_name(sp->state[cp->protoidx]));
1817 if (cp->proto != PPP_LCP)
1819 /* Discard the packet. */
1822 if (cp->proto != PPP_LCP)
1824 if (sp->state[cp->protoidx] != STATE_OPENED) {
1826 log(-1, SPP_FMT "lcp echo req but lcp closed\n",
1833 log(-1, SPP_FMT "invalid lcp echo request "
1834 "packet length: %d bytes\n",
1835 SPP_ARGS(ifp), len);
1838 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) &&
1839 ntohl (*(long*)(h+1)) == sp->lcp.magic) {
1840 /* Line loopback mode detected. */
1841 printf(SPP_FMT "loopback\n", SPP_ARGS(ifp));
1842 sp->pp_loopcnt = MAXALIVECNT * 5;
1844 sppp_qflush (&sp->pp_cpq);
1846 /* Shut down the PPP link. */
1852 *(long*)(h+1) = htonl (sp->lcp.magic);
1854 log(-1, SPP_FMT "got lcp echo req, sending echo rep\n",
1856 sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1);
1859 if (cp->proto != PPP_LCP)
1861 if (h->ident != sp->lcp.echoid) {
1867 log(-1, SPP_FMT "lcp invalid echo reply "
1868 "packet length: %d bytes\n",
1869 SPP_ARGS(ifp), len);
1873 log(-1, SPP_FMT "lcp got echo rep\n",
1875 if (!(sp->lcp.opts & (1 << LCP_OPT_MAGIC)) ||
1876 ntohl (*(long*)(h+1)) != sp->lcp.magic)
1877 sp->pp_alivecnt = 0;
1880 /* Unknown packet type -- send Code-Reject packet. */
1883 log(-1, SPP_FMT "%s send code-rej for 0x%x\n",
1884 SPP_ARGS(ifp), cp->name, h->type);
1885 sppp_cp_send(sp, cp->proto, CODE_REJ,
1886 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h);
1893 * The generic part of all Up/Down/Open/Close/TO event handlers.
1894 * Basically, the state transition handling in the automaton.
1897 sppp_up_event(const struct cp *cp, struct sppp *sp)
1902 log(LOG_DEBUG, SPP_FMT "%s up(%s)\n",
1903 SPP_ARGS(ifp), cp->name,
1904 sppp_state_name(sp->state[cp->protoidx]));
1906 switch (sp->state[cp->protoidx]) {
1908 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1910 case STATE_STARTING:
1911 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1913 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1916 printf(SPP_FMT "%s illegal up in state %s\n",
1917 SPP_ARGS(ifp), cp->name,
1918 sppp_state_name(sp->state[cp->protoidx]));
1923 sppp_down_event(const struct cp *cp, struct sppp *sp)
1928 log(LOG_DEBUG, SPP_FMT "%s down(%s)\n",
1929 SPP_ARGS(ifp), cp->name,
1930 sppp_state_name(sp->state[cp->protoidx]));
1932 switch (sp->state[cp->protoidx]) {
1935 sppp_cp_change_state(cp, sp, STATE_INITIAL);
1938 sppp_cp_change_state(cp, sp, STATE_STARTING);
1941 case STATE_STOPPING:
1942 case STATE_REQ_SENT:
1943 case STATE_ACK_RCVD:
1944 case STATE_ACK_SENT:
1945 sppp_cp_change_state(cp, sp, STATE_STARTING);
1949 sppp_cp_change_state(cp, sp, STATE_STARTING);
1952 printf(SPP_FMT "%s illegal down in state %s\n",
1953 SPP_ARGS(ifp), cp->name,
1954 sppp_state_name(sp->state[cp->protoidx]));
1960 sppp_open_event(const struct cp *cp, struct sppp *sp)
1965 log(LOG_DEBUG, SPP_FMT "%s open(%s)\n",
1966 SPP_ARGS(ifp), cp->name,
1967 sppp_state_name(sp->state[cp->protoidx]));
1969 switch (sp->state[cp->protoidx]) {
1971 sppp_cp_change_state(cp, sp, STATE_STARTING);
1974 case STATE_STARTING:
1977 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1979 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1983 * Try escaping stopped state. This seems to bite
1984 * people occasionally, in particular for IPCP,
1985 * presumably following previous IPCP negotiation
1986 * aborts. Somehow, we must have missed a Down event
1987 * which would have caused a transition into starting
1988 * state, so as a bandaid we force the Down event now.
1989 * This effectively implements (something like the)
1990 * `restart' option mentioned in the state transition
1991 * table of RFC 1661.
1993 sppp_cp_change_state(cp, sp, STATE_STARTING);
1996 case STATE_STOPPING:
1997 case STATE_REQ_SENT:
1998 case STATE_ACK_RCVD:
1999 case STATE_ACK_SENT:
2003 sppp_cp_change_state(cp, sp, STATE_STOPPING);
2010 sppp_close_event(const struct cp *cp, struct sppp *sp)
2015 log(LOG_DEBUG, SPP_FMT "%s close(%s)\n",
2016 SPP_ARGS(ifp), cp->name,
2017 sppp_state_name(sp->state[cp->protoidx]));
2019 switch (sp->state[cp->protoidx]) {
2024 case STATE_STARTING:
2025 sppp_cp_change_state(cp, sp, STATE_INITIAL);
2029 sppp_cp_change_state(cp, sp, STATE_CLOSED);
2031 case STATE_STOPPING:
2032 sppp_cp_change_state(cp, sp, STATE_CLOSING);
2037 case STATE_REQ_SENT:
2038 case STATE_ACK_RCVD:
2039 case STATE_ACK_SENT:
2040 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate;
2041 sppp_cp_send(sp, cp->proto, TERM_REQ,
2042 ++sp->pp_seq[cp->protoidx], 0, 0);
2043 sppp_cp_change_state(cp, sp, STATE_CLOSING);
2049 sppp_to_event(const struct cp *cp, struct sppp *sp)
2055 log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n",
2056 SPP_ARGS(ifp), cp->name,
2057 sppp_state_name(sp->state[cp->protoidx]),
2058 sp->rst_counter[cp->protoidx]);
2060 if (--sp->rst_counter[cp->protoidx] < 0)
2062 switch (sp->state[cp->protoidx]) {
2064 sppp_cp_change_state(cp, sp, STATE_CLOSED);
2067 case STATE_STOPPING:
2068 sppp_cp_change_state(cp, sp, STATE_STOPPED);
2071 case STATE_REQ_SENT:
2072 case STATE_ACK_RCVD:
2073 case STATE_ACK_SENT:
2074 sppp_cp_change_state(cp, sp, STATE_STOPPED);
2080 switch (sp->state[cp->protoidx]) {
2082 case STATE_STOPPING:
2083 sppp_cp_send(sp, cp->proto, TERM_REQ,
2084 ++sp->pp_seq[cp->protoidx], 0, 0);
2085 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout,
2086 cp->TO, (void *)sp);
2088 case STATE_REQ_SENT:
2089 case STATE_ACK_RCVD:
2091 /* sppp_cp_change_state() will restart the timer */
2092 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
2094 case STATE_ACK_SENT:
2096 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout,
2097 cp->TO, (void *)sp);
2105 * Change the state of a control protocol in the state automaton.
2106 * Takes care of starting/stopping the restart timer.
2109 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate)
2111 sp->state[cp->protoidx] = newstate;
2113 callout_stop (&sp->ch[cp->protoidx]);
2117 case STATE_STARTING:
2123 case STATE_STOPPING:
2124 case STATE_REQ_SENT:
2125 case STATE_ACK_RCVD:
2126 case STATE_ACK_SENT:
2127 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout,
2128 cp->TO, (void *)sp);
2134 *--------------------------------------------------------------------------*
2136 * The LCP implementation. *
2138 *--------------------------------------------------------------------------*
2141 sppp_pp_up(struct sppp *sp)
2149 sppp_pp_down(struct sppp *sp)
2157 sppp_lcp_init(struct sppp *sp)
2159 sp->lcp.opts = (1 << LCP_OPT_MAGIC);
2161 sp->state[IDX_LCP] = STATE_INITIAL;
2162 sp->fail_counter[IDX_LCP] = 0;
2163 sp->pp_seq[IDX_LCP] = 0;
2164 sp->pp_rseq[IDX_LCP] = 0;
2166 sp->lcp.mru = sp->lcp.their_mru = PP_MTU;
2168 /* Note that these values are relevant for all control protocols */
2169 sp->lcp.timeout = 3 * hz;
2170 sp->lcp.max_terminate = 2;
2171 sp->lcp.max_configure = 10;
2172 sp->lcp.max_failure = 10;
2173 callout_init(&sp->ch[IDX_LCP], CALLOUT_MPSAFE);
2177 sppp_lcp_up(struct sppp *sp)
2181 sp->pp_alivecnt = 0;
2182 sp->lcp.opts = (1 << LCP_OPT_MAGIC);
2185 sp->lcp.mru = sp->lcp.their_mru = PP_MTU;
2187 * If we are authenticator, negotiate LCP_AUTH
2189 if (sp->hisauth.proto != 0)
2190 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO);
2192 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
2193 sp->pp_flags &= ~PP_NEEDAUTH;
2195 * If this interface is passive or dial-on-demand, and we are
2196 * still in Initial state, it means we've got an incoming
2197 * call. Activate the interface.
2199 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) {
2202 SPP_FMT "Up event", SPP_ARGS(ifp));
2203 ifp->if_drv_flags |= IFF_DRV_RUNNING;
2204 if (sp->state[IDX_LCP] == STATE_INITIAL) {
2206 log(-1, "(incoming call)\n");
2207 sp->pp_flags |= PP_CALLIN;
2211 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 &&
2212 (sp->state[IDX_LCP] == STATE_INITIAL)) {
2213 ifp->if_drv_flags |= IFF_DRV_RUNNING;
2217 sppp_up_event(&lcp, sp);
2221 sppp_lcp_down(struct sppp *sp)
2225 sppp_down_event(&lcp, sp);
2228 * If this is neither a dial-on-demand nor a passive
2229 * interface, simulate an ``ifconfig down'' action, so the
2230 * administrator can force a redial by another ``ifconfig
2231 * up''. XXX For leased line operation, should we immediately
2232 * try to reopen the connection here?
2234 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) {
2236 SPP_FMT "Down event, taking interface down.\n",
2242 SPP_FMT "Down event (carrier loss)\n",
2244 sp->pp_flags &= ~PP_CALLIN;
2245 if (sp->state[IDX_LCP] != STATE_INITIAL)
2247 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
2252 sppp_lcp_open(struct sppp *sp)
2254 sppp_open_event(&lcp, sp);
2258 sppp_lcp_close(struct sppp *sp)
2260 sppp_close_event(&lcp, sp);
2264 sppp_lcp_TO(void *cookie)
2266 sppp_to_event(&lcp, (struct sppp *)cookie);
2270 * Analyze a configure request. Return true if it was agreeable, and
2271 * caused action sca, false if it has been rejected or nak'ed, and
2272 * caused action scn. (The return value is used to make the state
2273 * transition decision in the state automaton.)
2276 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
2279 u_char *buf, *r, *p;
2286 buf = r = malloc (len, M_TEMP, M_NOWAIT);
2291 log(LOG_DEBUG, SPP_FMT "lcp parse opts: ",
2294 /* pass 1: check for things that need to be rejected */
2296 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
2297 len-=p[1], p+=p[1]) {
2299 log(-1, " %s ", sppp_lcp_opt_name(*p));
2303 if (len >= 6 && p[1] == 6)
2306 log(-1, "[invalid] ");
2308 case LCP_OPT_ASYNC_MAP:
2309 /* Async control character map. */
2310 if (len >= 6 && p[1] == 6)
2313 log(-1, "[invalid] ");
2316 /* Maximum receive unit. */
2317 if (len >= 4 && p[1] == 4)
2320 log(-1, "[invalid] ");
2322 case LCP_OPT_AUTH_PROTO:
2325 log(-1, "[invalid] ");
2328 authproto = (p[2] << 8) + p[3];
2329 if (authproto == PPP_CHAP && p[1] != 5) {
2331 log(-1, "[invalid chap len] ");
2334 if (sp->myauth.proto == 0) {
2335 /* we are not configured to do auth */
2337 log(-1, "[not configured] ");
2341 * Remote want us to authenticate, remember this,
2342 * so we stay in PHASE_AUTHENTICATE after LCP got
2345 sp->pp_flags |= PP_NEEDAUTH;
2348 /* Others not supported. */
2353 /* Add the option to rejected list. */
2360 log(-1, " send conf-rej\n");
2361 sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
2367 * pass 2: check for option values that are unacceptable and
2368 * thus require to be nak'ed.
2371 log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ",
2376 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
2377 len-=p[1], p+=p[1]) {
2379 log(-1, " %s ", sppp_lcp_opt_name(*p));
2382 /* Magic number -- extract. */
2383 nmagic = (u_long)p[2] << 24 |
2384 (u_long)p[3] << 16 | p[4] << 8 | p[5];
2385 if (nmagic != sp->lcp.magic) {
2388 log(-1, "0x%lx ", nmagic);
2391 if (debug && sp->pp_loopcnt < MAXALIVECNT*5)
2392 log(-1, "[glitch] ");
2395 * We negate our magic here, and NAK it. If
2396 * we see it later in an NAK packet, we
2397 * suggest a new one.
2399 nmagic = ~sp->lcp.magic;
2401 p[2] = nmagic >> 24;
2402 p[3] = nmagic >> 16;
2407 case LCP_OPT_ASYNC_MAP:
2409 * Async control character map -- just ignore it.
2411 * Quote from RFC 1662, chapter 6:
2412 * To enable this functionality, synchronous PPP
2413 * implementations MUST always respond to the
2414 * Async-Control-Character-Map Configuration
2415 * Option with the LCP Configure-Ack. However,
2416 * acceptance of the Configuration Option does
2417 * not imply that the synchronous implementation
2418 * will do any ACCM mapping. Instead, all such
2419 * octet mapping will be performed by the
2420 * asynchronous-to-synchronous converter.
2426 * Maximum receive unit. Always agreeable,
2427 * but ignored by now.
2429 sp->lcp.their_mru = p[2] * 256 + p[3];
2431 log(-1, "%lu ", sp->lcp.their_mru);
2434 case LCP_OPT_AUTH_PROTO:
2435 authproto = (p[2] << 8) + p[3];
2436 if (sp->myauth.proto != authproto) {
2437 /* not agreed, nak */
2439 log(-1, "[mine %s != his %s] ",
2440 sppp_proto_name(sp->hisauth.proto),
2441 sppp_proto_name(authproto));
2442 p[2] = sp->myauth.proto >> 8;
2443 p[3] = sp->myauth.proto;
2446 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) {
2448 log(-1, "[chap not MD5] ");
2454 /* Add the option to nak'ed list. */
2461 * Local and remote magics equal -- loopback?
2463 if (sp->pp_loopcnt >= MAXALIVECNT*5) {
2464 if (sp->pp_loopcnt == MAXALIVECNT*5)
2465 printf (SPP_FMT "loopback\n",
2467 if (ifp->if_flags & IFF_UP) {
2469 sppp_qflush(&sp->pp_cpq);
2474 } else if (!sp->pp_loopcnt &&
2475 ++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) {
2477 log(-1, " max_failure (%d) exceeded, "
2479 sp->lcp.max_failure);
2480 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
2483 log(-1, " send conf-nak\n");
2484 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf);
2488 log(-1, " send conf-ack\n");
2489 sp->fail_counter[IDX_LCP] = 0;
2491 sppp_cp_send (sp, PPP_LCP, CONF_ACK,
2492 h->ident, origlen, h+1);
2500 * Analyze the LCP Configure-Reject option list, and adjust our
2504 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
2510 buf = malloc (len, M_TEMP, M_NOWAIT);
2515 log(LOG_DEBUG, SPP_FMT "lcp rej opts: ",
2519 for (; len >= 2 && p[1] >= 2 && len >= p[1];
2520 len -= p[1], p += p[1]) {
2522 log(-1, " %s ", sppp_lcp_opt_name(*p));
2525 /* Magic number -- can't use it, use 0 */
2526 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC);
2531 * Should not be rejected anyway, since we only
2532 * negotiate a MRU if explicitly requested by
2535 sp->lcp.opts &= ~(1 << LCP_OPT_MRU);
2537 case LCP_OPT_AUTH_PROTO:
2539 * Peer doesn't want to authenticate himself,
2540 * deny unless this is a dialout call, and
2541 * AUTHFLAG_NOCALLOUT is set.
2543 if ((sp->pp_flags & PP_CALLIN) == 0 &&
2544 (sp->hisauth.flags & AUTHFLAG_NOCALLOUT) != 0) {
2546 log(-1, "[don't insist on auth "
2548 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
2552 log(-1, "[access denied]\n");
2564 * Analyze the LCP Configure-NAK option list, and adjust our
2568 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
2575 buf = malloc (len, M_TEMP, M_NOWAIT);
2580 log(LOG_DEBUG, SPP_FMT "lcp nak opts: ",
2584 for (; len >= 2 && p[1] >= 2 && len >= p[1];
2585 len -= p[1], p += p[1]) {
2587 log(-1, " %s ", sppp_lcp_opt_name(*p));
2590 /* Magic number -- renegotiate */
2591 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) &&
2592 len >= 6 && p[1] == 6) {
2593 magic = (u_long)p[2] << 24 |
2594 (u_long)p[3] << 16 | p[4] << 8 | p[5];
2596 * If the remote magic is our negated one,
2597 * this looks like a loopback problem.
2598 * Suggest a new magic to make sure.
2600 if (magic == ~sp->lcp.magic) {
2602 log(-1, "magic glitch ");
2603 sp->lcp.magic = random();
2605 sp->lcp.magic = magic;
2607 log(-1, "%lu ", magic);
2613 * Peer wants to advise us to negotiate an MRU.
2614 * Agree on it if it's reasonable, or use
2615 * default otherwise.
2617 if (len >= 4 && p[1] == 4) {
2618 u_int mru = p[2] * 256 + p[3];
2620 log(-1, "%d ", mru);
2621 if (mru < PP_MTU || mru > PP_MAX_MRU)
2624 sp->lcp.opts |= (1 << LCP_OPT_MRU);
2627 case LCP_OPT_AUTH_PROTO:
2629 * Peer doesn't like our authentication method,
2633 log(-1, "[access denied]\n");
2645 sppp_lcp_tlu(struct sppp *sp)
2652 if (! (ifp->if_flags & IFF_UP) &&
2653 (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
2654 /* Coming out of loopback mode. */
2656 printf (SPP_FMT "up\n", SPP_ARGS(ifp));
2659 for (i = 0; i < IDX_COUNT; i++)
2660 if ((cps[i])->flags & CP_QUAL)
2663 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 ||
2664 (sp->pp_flags & PP_NEEDAUTH) != 0)
2665 sp->pp_phase = PHASE_AUTHENTICATE;
2667 sp->pp_phase = PHASE_NETWORK;
2670 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2671 sppp_phase_name(sp->pp_phase));
2674 * Open all authentication protocols. This is even required
2675 * if we already proceeded to network phase, since it might be
2676 * that remote wants us to authenticate, so we might have to
2677 * send a PAP request. Undesired authentication protocols
2678 * don't do anything when they get an Open event.
2680 for (i = 0; i < IDX_COUNT; i++)
2681 if ((cps[i])->flags & CP_AUTH)
2684 if (sp->pp_phase == PHASE_NETWORK) {
2685 /* Notify all NCPs. */
2686 for (i = 0; i < IDX_COUNT; i++)
2687 if (((cps[i])->flags & CP_NCP) &&
2690 * Hack to administratively disable IPv6 if
2691 * not desired. Perhaps we should have another
2692 * flag for this, but right now, we can make
2693 * all struct cp's read/only.
2695 (cps[i] != &ipv6cp ||
2696 (sp->confflags & CONF_ENABLE_IPV6)))
2700 /* Send Up events to all started protos. */
2701 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2702 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0)
2705 /* notify low-level driver of state change */
2707 sp->pp_chg(sp, (int)sp->pp_phase);
2709 if (sp->pp_phase == PHASE_NETWORK)
2710 /* if no NCP is starting, close down */
2711 sppp_lcp_check_and_close(sp);
2715 sppp_lcp_tld(struct sppp *sp)
2721 sp->pp_phase = PHASE_TERMINATE;
2724 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2725 sppp_phase_name(sp->pp_phase));
2728 * Take upper layers down. We send the Down event first and
2729 * the Close second to prevent the upper layers from sending
2730 * ``a flurry of terminate-request packets'', as the RFC
2733 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2734 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) {
2736 (cps[i])->Close(sp);
2741 sppp_lcp_tls(struct sppp *sp)
2745 sp->pp_phase = PHASE_ESTABLISH;
2748 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2749 sppp_phase_name(sp->pp_phase));
2751 /* Notify lower layer if desired. */
2759 sppp_lcp_tlf(struct sppp *sp)
2763 sp->pp_phase = PHASE_DEAD;
2765 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2766 sppp_phase_name(sp->pp_phase));
2768 /* Notify lower layer if desired. */
2776 sppp_lcp_scr(struct sppp *sp)
2778 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */];
2782 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) {
2783 if (! sp->lcp.magic)
2784 sp->lcp.magic = random();
2785 opt[i++] = LCP_OPT_MAGIC;
2787 opt[i++] = sp->lcp.magic >> 24;
2788 opt[i++] = sp->lcp.magic >> 16;
2789 opt[i++] = sp->lcp.magic >> 8;
2790 opt[i++] = sp->lcp.magic;
2793 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) {
2794 opt[i++] = LCP_OPT_MRU;
2796 opt[i++] = sp->lcp.mru >> 8;
2797 opt[i++] = sp->lcp.mru;
2800 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) {
2801 authproto = sp->hisauth.proto;
2802 opt[i++] = LCP_OPT_AUTH_PROTO;
2803 opt[i++] = authproto == PPP_CHAP? 5: 4;
2804 opt[i++] = authproto >> 8;
2805 opt[i++] = authproto;
2806 if (authproto == PPP_CHAP)
2807 opt[i++] = CHAP_MD5;
2810 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP];
2811 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt);
2815 * Check the open NCPs, return true if at least one NCP is open.
2818 sppp_ncp_check(struct sppp *sp)
2822 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2823 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP)
2829 * Re-check the open NCPs and see if we should terminate the link.
2830 * Called by the NCPs during their tlf action handling.
2833 sppp_lcp_check_and_close(struct sppp *sp)
2836 if (sp->pp_phase < PHASE_NETWORK)
2837 /* don't bother, we are already going down */
2840 if (sppp_ncp_check(sp))
2847 *--------------------------------------------------------------------------*
2849 * The IPCP implementation. *
2851 *--------------------------------------------------------------------------*
2856 sppp_ipcp_init(struct sppp *sp)
2860 sp->state[IDX_IPCP] = STATE_INITIAL;
2861 sp->fail_counter[IDX_IPCP] = 0;
2862 sp->pp_seq[IDX_IPCP] = 0;
2863 sp->pp_rseq[IDX_IPCP] = 0;
2864 callout_init(&sp->ch[IDX_IPCP], CALLOUT_MPSAFE);
2868 sppp_ipcp_up(struct sppp *sp)
2870 sppp_up_event(&ipcp, sp);
2874 sppp_ipcp_down(struct sppp *sp)
2876 sppp_down_event(&ipcp, sp);
2880 sppp_ipcp_open(struct sppp *sp)
2883 u_long myaddr, hisaddr;
2885 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN | IPCP_MYADDR_SEEN |
2886 IPCP_MYADDR_DYN | IPCP_VJ);
2889 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0);
2891 * If we don't have his address, this probably means our
2892 * interface doesn't want to talk IP at all. (This could
2893 * be the case if somebody wants to speak only IPX, for
2894 * example.) Don't open IPCP in this case.
2896 if (hisaddr == 0L) {
2897 /* XXX this message should go away */
2899 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n",
2905 * I don't have an assigned address, so i need to
2906 * negotiate my address.
2908 sp->ipcp.flags |= IPCP_MYADDR_DYN;
2909 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
2911 sp->ipcp.flags |= IPCP_MYADDR_SEEN;
2912 if (sp->confflags & CONF_ENABLE_VJ) {
2913 sp->ipcp.opts |= (1 << IPCP_OPT_COMPRESSION);
2914 sp->ipcp.max_state = MAX_STATES - 1;
2915 sp->ipcp.compress_cid = 1;
2917 sppp_open_event(&ipcp, sp);
2921 sppp_ipcp_close(struct sppp *sp)
2923 sppp_close_event(&ipcp, sp);
2924 if (sp->ipcp.flags & IPCP_MYADDR_DYN)
2926 * My address was dynamic, clear it again.
2928 sppp_set_ip_addr(sp, 0L);
2932 sppp_ipcp_TO(void *cookie)
2934 sppp_to_event(&ipcp, (struct sppp *)cookie);
2938 * Analyze a configure request. Return true if it was agreeable, and
2939 * caused action sca, false if it has been rejected or nak'ed, and
2940 * caused action scn. (The return value is used to make the state
2941 * transition decision in the state automaton.)
2944 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
2946 u_char *buf, *r, *p;
2947 struct ifnet *ifp = SP2IFP(sp);
2948 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
2949 u_long hisaddr, desiredaddr;
2956 * Make sure to allocate a buf that can at least hold a
2957 * conf-nak with an `address' option. We might need it below.
2959 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT);
2963 /* pass 1: see if we can recognize them */
2965 log(LOG_DEBUG, SPP_FMT "ipcp parse opts: ",
2968 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
2969 len-=p[1], p+=p[1]) {
2971 log(-1, " %s ", sppp_ipcp_opt_name(*p));
2973 case IPCP_OPT_COMPRESSION:
2974 if (!(sp->confflags & CONF_ENABLE_VJ)) {
2975 /* VJ compression administratively disabled */
2977 log(-1, "[locally disabled] ");
2981 * In theory, we should only conf-rej an
2982 * option that is shorter than RFC 1618
2983 * requires (i.e. < 4), and should conf-nak
2984 * anything else that is not VJ. However,
2985 * since our algorithm always uses the
2986 * original option to NAK it with new values,
2987 * things would become more complicated. In
2988 * pratice, the only commonly implemented IP
2989 * compression option is VJ anyway, so the
2990 * difference is negligible.
2992 if (len >= 6 && p[1] == 6) {
2994 * correctly formed compression option
2995 * that could be VJ compression
3001 "optlen %d [invalid/unsupported] ",
3004 case IPCP_OPT_ADDRESS:
3005 if (len >= 6 && p[1] == 6) {
3006 /* correctly formed address option */
3010 log(-1, "[invalid] ");
3013 /* Others not supported. */
3018 /* Add the option to rejected list. */
3025 log(-1, " send conf-rej\n");
3026 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf);
3031 /* pass 2: parse option values */
3032 sppp_get_ip_addrs(sp, 0, &hisaddr, 0);
3034 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ",
3038 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
3039 len-=p[1], p+=p[1]) {
3041 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3043 case IPCP_OPT_COMPRESSION:
3044 desiredcomp = p[2] << 8 | p[3];
3045 /* We only support VJ */
3046 if (desiredcomp == IPCP_COMP_VJ) {
3048 log(-1, "VJ [ack] ");
3049 sp->ipcp.flags |= IPCP_VJ;
3050 sl_compress_init(sp->pp_comp, p[4]);
3051 sp->ipcp.max_state = p[4];
3052 sp->ipcp.compress_cid = p[5];
3057 "compproto %#04x [not supported] ",
3059 p[2] = IPCP_COMP_VJ >> 8;
3060 p[3] = IPCP_COMP_VJ;
3061 p[4] = sp->ipcp.max_state;
3062 p[5] = sp->ipcp.compress_cid;
3064 case IPCP_OPT_ADDRESS:
3065 /* This is the address he wants in his end */
3066 desiredaddr = p[2] << 24 | p[3] << 16 |
3068 if (desiredaddr == hisaddr ||
3069 (hisaddr >= 1 && hisaddr <= 254 && desiredaddr != 0)) {
3071 * Peer's address is same as our value,
3072 * or we have set it to 0.0.0.* to
3073 * indicate that we do not really care,
3074 * this is agreeable. Gonna conf-ack
3078 log(-1, "%s [ack] ",
3079 sppp_dotted_quad(hisaddr));
3080 /* record that we've seen it already */
3081 sp->ipcp.flags |= IPCP_HISADDR_SEEN;
3085 * The address wasn't agreeable. This is either
3086 * he sent us 0.0.0.0, asking to assign him an
3087 * address, or he send us another address not
3088 * matching our value. Either case, we gonna
3089 * conf-nak it with our value.
3090 * XXX: we should "rej" if hisaddr == 0
3093 if (desiredaddr == 0)
3094 log(-1, "[addr requested] ");
3096 log(-1, "%s [not agreed] ",
3097 sppp_dotted_quad(desiredaddr));
3100 p[2] = hisaddr >> 24;
3101 p[3] = hisaddr >> 16;
3102 p[4] = hisaddr >> 8;
3106 /* Add the option to nak'ed list. */
3113 * If we are about to conf-ack the request, but haven't seen
3114 * his address so far, gonna conf-nak it instead, with the
3115 * `address' option present and our idea of his address being
3116 * filled in there, to request negotiation of both addresses.
3118 * XXX This can result in an endless req - nak loop if peer
3119 * doesn't want to send us his address. Q: What should we do
3120 * about it? XXX A: implement the max-failure counter.
3122 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN) && !gotmyaddr) {
3123 buf[0] = IPCP_OPT_ADDRESS;
3125 buf[2] = hisaddr >> 24;
3126 buf[3] = hisaddr >> 16;
3127 buf[4] = hisaddr >> 8;
3131 log(-1, "still need hisaddr ");
3136 log(-1, " send conf-nak\n");
3137 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf);
3140 log(-1, " send conf-ack\n");
3141 sppp_cp_send (sp, PPP_IPCP, CONF_ACK,
3142 h->ident, origlen, h+1);
3150 * Analyze the IPCP Configure-Reject option list, and adjust our
3154 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3157 struct ifnet *ifp = SP2IFP(sp);
3158 int debug = ifp->if_flags & IFF_DEBUG;
3161 buf = malloc (len, M_TEMP, M_NOWAIT);
3166 log(LOG_DEBUG, SPP_FMT "ipcp rej opts: ",
3170 for (; len >= 2 && p[1] >= 2 && len >= p[1];
3171 len -= p[1], p += p[1]) {
3173 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3175 case IPCP_OPT_COMPRESSION:
3176 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESSION);
3178 case IPCP_OPT_ADDRESS:
3180 * Peer doesn't grok address option. This is
3181 * bad. XXX Should we better give up here?
3182 * XXX We could try old "addresses" option...
3184 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS);
3195 * Analyze the IPCP Configure-NAK option list, and adjust our
3199 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3202 struct ifnet *ifp = SP2IFP(sp);
3203 int debug = ifp->if_flags & IFF_DEBUG;
3208 buf = malloc (len, M_TEMP, M_NOWAIT);
3213 log(LOG_DEBUG, SPP_FMT "ipcp nak opts: ",
3217 for (; len >= 2 && p[1] >= 2 && len >= p[1];
3218 len -= p[1], p += p[1]) {
3220 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3222 case IPCP_OPT_COMPRESSION:
3223 if (len >= 6 && p[1] == 6) {
3224 desiredcomp = p[2] << 8 | p[3];
3226 log(-1, "[wantcomp %#04x] ",
3228 if (desiredcomp == IPCP_COMP_VJ) {
3229 sl_compress_init(sp->pp_comp, p[4]);
3230 sp->ipcp.max_state = p[4];
3231 sp->ipcp.compress_cid = p[5];
3233 log(-1, "[agree] ");
3236 ~(1 << IPCP_OPT_COMPRESSION);
3239 case IPCP_OPT_ADDRESS:
3241 * Peer doesn't like our local IP address. See
3242 * if we can do something for him. We'll drop
3243 * him our address then.
3245 if (len >= 6 && p[1] == 6) {
3246 wantaddr = p[2] << 24 | p[3] << 16 |
3248 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
3250 log(-1, "[wantaddr %s] ",
3251 sppp_dotted_quad(wantaddr));
3253 * When doing dynamic address assignment,
3254 * we accept his offer. Otherwise, we
3255 * ignore it and thus continue to negotiate
3256 * our already existing value.
3257 * XXX: Bogus, if he said no once, he'll
3258 * just say no again, might as well die.
3260 if (sp->ipcp.flags & IPCP_MYADDR_DYN) {
3261 sppp_set_ip_addr(sp, wantaddr);
3263 log(-1, "[agree] ");
3264 sp->ipcp.flags |= IPCP_MYADDR_SEEN;
3277 sppp_ipcp_tlu(struct sppp *sp)
3279 /* we are up - notify isdn daemon */
3285 sppp_ipcp_tld(struct sppp *sp)
3290 sppp_ipcp_tls(struct sppp *sp)
3292 /* indicate to LCP that it must stay alive */
3293 sp->lcp.protos |= (1 << IDX_IPCP);
3297 sppp_ipcp_tlf(struct sppp *sp)
3299 /* we no longer need LCP */
3300 sp->lcp.protos &= ~(1 << IDX_IPCP);
3301 sppp_lcp_check_and_close(sp);
3305 sppp_ipcp_scr(struct sppp *sp)
3307 char opt[6 /* compression */ + 6 /* address */];
3311 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) {
3312 opt[i++] = IPCP_OPT_COMPRESSION;
3314 opt[i++] = IPCP_COMP_VJ >> 8;
3315 opt[i++] = IPCP_COMP_VJ;
3316 opt[i++] = sp->ipcp.max_state;
3317 opt[i++] = sp->ipcp.compress_cid;
3319 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) {
3320 sppp_get_ip_addrs(sp, &ouraddr, 0, 0);
3321 opt[i++] = IPCP_OPT_ADDRESS;
3323 opt[i++] = ouraddr >> 24;
3324 opt[i++] = ouraddr >> 16;
3325 opt[i++] = ouraddr >> 8;
3329 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP];
3330 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt);
3334 sppp_ipcp_init(struct sppp *sp)
3339 sppp_ipcp_up(struct sppp *sp)
3344 sppp_ipcp_down(struct sppp *sp)
3349 sppp_ipcp_open(struct sppp *sp)
3354 sppp_ipcp_close(struct sppp *sp)
3359 sppp_ipcp_TO(void *cookie)
3364 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3370 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3375 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3380 sppp_ipcp_tlu(struct sppp *sp)
3385 sppp_ipcp_tld(struct sppp *sp)
3390 sppp_ipcp_tls(struct sppp *sp)
3395 sppp_ipcp_tlf(struct sppp *sp)
3400 sppp_ipcp_scr(struct sppp *sp)
3406 *--------------------------------------------------------------------------*
3408 * The IPv6CP implementation. *
3410 *--------------------------------------------------------------------------*
3415 sppp_ipv6cp_init(struct sppp *sp)
3417 sp->ipv6cp.opts = 0;
3418 sp->ipv6cp.flags = 0;
3419 sp->state[IDX_IPV6CP] = STATE_INITIAL;
3420 sp->fail_counter[IDX_IPV6CP] = 0;
3421 sp->pp_seq[IDX_IPV6CP] = 0;
3422 sp->pp_rseq[IDX_IPV6CP] = 0;
3423 callout_init(&sp->ch[IDX_IPV6CP], CALLOUT_MPSAFE);
3427 sppp_ipv6cp_up(struct sppp *sp)
3429 sppp_up_event(&ipv6cp, sp);
3433 sppp_ipv6cp_down(struct sppp *sp)
3435 sppp_down_event(&ipv6cp, sp);
3439 sppp_ipv6cp_open(struct sppp *sp)
3442 struct in6_addr myaddr, hisaddr;
3444 #ifdef IPV6CP_MYIFID_DYN
3445 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN);
3447 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN;
3450 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0);
3452 * If we don't have our address, this probably means our
3453 * interface doesn't want to talk IPv6 at all. (This could
3454 * be the case if somebody wants to speak only IPX, for
3455 * example.) Don't open IPv6CP in this case.
3457 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) {
3458 /* XXX this message should go away */
3460 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n",
3465 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN;
3466 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID);
3467 sppp_open_event(&ipv6cp, sp);
3471 sppp_ipv6cp_close(struct sppp *sp)
3473 sppp_close_event(&ipv6cp, sp);
3477 sppp_ipv6cp_TO(void *cookie)
3479 sppp_to_event(&ipv6cp, (struct sppp *)cookie);
3483 * Analyze a configure request. Return true if it was agreeable, and
3484 * caused action sca, false if it has been rejected or nak'ed, and
3485 * caused action scn. (The return value is used to make the state
3486 * transition decision in the state automaton.)
3489 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3491 u_char *buf, *r, *p;
3492 struct ifnet *ifp = SP2IFP(sp);
3493 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
3494 struct in6_addr myaddr, desiredaddr, suggestaddr;
3497 int collision, nohisaddr;
3498 char ip6buf[INET6_ADDRSTRLEN];
3503 * Make sure to allocate a buf that can at least hold a
3504 * conf-nak with an `address' option. We might need it below.
3506 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT);
3510 /* pass 1: see if we can recognize them */
3512 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:",
3516 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
3517 len-=p[1], p+=p[1]) {
3519 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3521 case IPV6CP_OPT_IFID:
3522 if (len >= 10 && p[1] == 10 && ifidcount == 0) {
3523 /* correctly formed address option */
3528 log(-1, " [invalid]");
3531 case IPV6CP_OPT_COMPRESSION:
3532 if (len >= 4 && p[1] >= 4) {
3533 /* correctly formed compress option */
3537 log(-1, " [invalid]");
3541 /* Others not supported. */
3546 /* Add the option to rejected list. */
3553 log(-1, " send conf-rej\n");
3554 sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf);
3559 /* pass 2: parse option values */
3560 sppp_get_ip6_addrs(sp, &myaddr, 0, 0);
3562 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ",
3567 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
3568 len-=p[1], p+=p[1]) {
3570 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3573 case IPV6CP_OPT_COMPRESSION:
3576 case IPV6CP_OPT_IFID:
3577 bzero(&desiredaddr, sizeof(desiredaddr));
3578 bcopy(&p[2], &desiredaddr.s6_addr[8], 8);
3579 collision = (bcmp(&desiredaddr.s6_addr[8],
3580 &myaddr.s6_addr[8], 8) == 0);
3581 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr);
3583 desiredaddr.s6_addr16[0] = htons(0xfe80);
3584 (void)in6_setscope(&desiredaddr, SP2IFP(sp), NULL);
3586 if (!collision && !nohisaddr) {
3587 /* no collision, hisaddr known - Conf-Ack */
3592 ip6_sprintf(ip6buf, &desiredaddr),
3593 sppp_cp_type_name(type));
3598 bzero(&suggestaddr, sizeof(suggestaddr));
3599 if (collision && nohisaddr) {
3600 /* collision, hisaddr unknown - Conf-Rej */
3605 * - no collision, hisaddr unknown, or
3606 * - collision, hisaddr known
3607 * Conf-Nak, suggest hisaddr
3610 sppp_suggest_ip6_addr(sp, &suggestaddr);
3611 bcopy(&suggestaddr.s6_addr[8], &p[2], 8);
3615 ip6_sprintf(ip6buf, &desiredaddr),
3616 sppp_cp_type_name(type));
3619 /* Add the option to nak'ed list. */
3625 if (rlen == 0 && type == CONF_ACK) {
3627 log(-1, " send %s\n", sppp_cp_type_name(type));
3628 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1);
3631 if (type == CONF_ACK)
3632 panic("IPv6CP RCR: CONF_ACK with non-zero rlen");
3636 log(-1, " send %s suggest %s\n",
3637 sppp_cp_type_name(type),
3638 ip6_sprintf(ip6buf, &suggestaddr));
3640 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf);
3649 * Analyze the IPv6CP Configure-Reject option list, and adjust our
3653 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3656 struct ifnet *ifp = SP2IFP(sp);
3657 int debug = ifp->if_flags & IFF_DEBUG;
3660 buf = malloc (len, M_TEMP, M_NOWAIT);
3665 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:",
3669 for (; len >= 2 && p[1] >= 2 && len >= p[1];
3670 len -= p[1], p += p[1]) {
3672 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3674 case IPV6CP_OPT_IFID:
3676 * Peer doesn't grok address option. This is
3677 * bad. XXX Should we better give up here?
3679 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID);
3682 case IPV6CP_OPT_COMPRESS:
3683 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS);
3695 * Analyze the IPv6CP Configure-NAK option list, and adjust our
3699 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3702 struct ifnet *ifp = SP2IFP(sp);
3703 int debug = ifp->if_flags & IFF_DEBUG;
3704 struct in6_addr suggestaddr;
3705 char ip6buf[INET6_ADDRSTRLEN];
3708 buf = malloc (len, M_TEMP, M_NOWAIT);
3713 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:",
3717 for (; len >= 2 && p[1] >= 2 && len >= p[1];
3718 len -= p[1], p += p[1]) {
3720 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3722 case IPV6CP_OPT_IFID:
3724 * Peer doesn't like our local ifid. See
3725 * if we can do something for him. We'll drop
3726 * him our address then.
3728 if (len < 10 || p[1] != 10)
3730 bzero(&suggestaddr, sizeof(suggestaddr));
3731 suggestaddr.s6_addr16[0] = htons(0xfe80);
3732 (void)in6_setscope(&suggestaddr, SP2IFP(sp), NULL);
3733 bcopy(&p[2], &suggestaddr.s6_addr[8], 8);
3735 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID);
3737 log(-1, " [suggestaddr %s]",
3738 ip6_sprintf(ip6buf, &suggestaddr));
3739 #ifdef IPV6CP_MYIFID_DYN
3741 * When doing dynamic address assignment,
3742 * we accept his offer.
3744 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) {
3745 struct in6_addr lastsuggest;
3747 * If <suggested myaddr from peer> equals to
3748 * <hisaddr we have suggested last time>,
3749 * we have a collision. generate new random
3752 sppp_suggest_ip6_addr(&lastsuggest);
3753 if (IN6_ARE_ADDR_EQUAL(&suggestaddr,
3756 log(-1, " [random]");
3757 sppp_gen_ip6_addr(sp, &suggestaddr);
3759 sppp_set_ip6_addr(sp, &suggestaddr, 0);
3761 log(-1, " [agree]");
3762 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN;
3766 * Since we do not do dynamic address assignment,
3767 * we ignore it and thus continue to negotiate
3768 * our already existing value. This can possibly
3769 * go into infinite request-reject loop.
3771 * This is not likely because we normally use
3772 * ifid based on MAC-address.
3773 * If you have no ethernet card on the node, too bad.
3774 * XXX should we use fail_counter?
3779 case IPV6CP_OPT_COMPRESS:
3781 * Peer wants different compression parameters.
3793 sppp_ipv6cp_tlu(struct sppp *sp)
3795 /* we are up - notify isdn daemon */
3801 sppp_ipv6cp_tld(struct sppp *sp)
3806 sppp_ipv6cp_tls(struct sppp *sp)
3808 /* indicate to LCP that it must stay alive */
3809 sp->lcp.protos |= (1 << IDX_IPV6CP);
3813 sppp_ipv6cp_tlf(struct sppp *sp)
3816 #if 0 /* need #if 0 to close IPv6CP properly */
3817 /* we no longer need LCP */
3818 sp->lcp.protos &= ~(1 << IDX_IPV6CP);
3819 sppp_lcp_check_and_close(sp);
3824 sppp_ipv6cp_scr(struct sppp *sp)
3826 char opt[10 /* ifid */ + 4 /* compression, minimum */];
3827 struct in6_addr ouraddr;
3830 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) {
3831 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0);
3832 opt[i++] = IPV6CP_OPT_IFID;
3834 bcopy(&ouraddr.s6_addr[8], &opt[i], 8);
3839 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) {
3840 opt[i++] = IPV6CP_OPT_COMPRESSION;
3842 opt[i++] = 0; /* TBD */
3843 opt[i++] = 0; /* TBD */
3844 /* variable length data may follow */
3848 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP];
3849 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt);
3852 static void sppp_ipv6cp_init(struct sppp *sp)
3856 static void sppp_ipv6cp_up(struct sppp *sp)
3860 static void sppp_ipv6cp_down(struct sppp *sp)
3865 static void sppp_ipv6cp_open(struct sppp *sp)
3869 static void sppp_ipv6cp_close(struct sppp *sp)
3873 static void sppp_ipv6cp_TO(void *sp)
3877 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3882 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3886 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3890 static void sppp_ipv6cp_tlu(struct sppp *sp)
3894 static void sppp_ipv6cp_tld(struct sppp *sp)
3898 static void sppp_ipv6cp_tls(struct sppp *sp)
3902 static void sppp_ipv6cp_tlf(struct sppp *sp)
3906 static void sppp_ipv6cp_scr(struct sppp *sp)
3912 *--------------------------------------------------------------------------*
3914 * The CHAP implementation. *
3916 *--------------------------------------------------------------------------*
3920 * The authentication protocols don't employ a full-fledged state machine as
3921 * the control protocols do, since they do have Open and Close events, but
3922 * not Up and Down, nor are they explicitly terminated. Also, use of the
3923 * authentication protocols may be different in both directions (this makes
3924 * sense, think of a machine that never accepts incoming calls but only
3925 * calls out, it doesn't require the called party to authenticate itself).
3927 * Our state machine for the local authentication protocol (we are requesting
3928 * the peer to authenticate) looks like:
3931 * +--------------------------------------------+
3933 * +--------+ Close +---------+ RCA+
3934 * | |<----------------------------------| |------+
3935 * +--->| Closed | TO* | Opened | sca |
3936 * | | |-----+ +-------| |<-----+
3937 * | +--------+ irc | | +---------+
3943 * | | +------->+ | |
3945 * | +--------+ V | |
3946 * | | |<----+<--------------------+ |
3952 * +------+ +------------------------------------------+
3953 * scn,tld sca,irc,ict,tlu
3958 * Open: LCP reached authentication phase
3959 * Close: LCP reached terminate phase
3961 * RCA+: received reply (pap-req, chap-response), acceptable
3962 * RCN: received reply (pap-req, chap-response), not acceptable
3963 * TO+: timeout with restart counter >= 0
3964 * TO-: timeout with restart counter < 0
3965 * TO*: reschedule timeout for CHAP
3967 * scr: send request packet (none for PAP, chap-challenge)
3968 * sca: send ack packet (pap-ack, chap-success)
3969 * scn: send nak packet (pap-nak, chap-failure)
3970 * ict: initialize re-challenge timer (CHAP only)
3972 * tlu: this-layer-up, LCP reaches network phase
3973 * tld: this-layer-down, LCP enters terminate phase
3975 * Note that in CHAP mode, after sending a new challenge, while the state
3976 * automaton falls back into Req-Sent state, it doesn't signal a tld
3977 * event to LCP, so LCP remains in network phase. Only after not getting
3978 * any response (or after getting an unacceptable response), CHAP closes,
3979 * causing LCP to enter terminate phase.
3981 * With PAP, there is no initial request that can be sent. The peer is
3982 * expected to send one based on the successful negotiation of PAP as
3983 * the authentication protocol during the LCP option negotiation.
3985 * Incoming authentication protocol requests (remote requests
3986 * authentication, we are peer) don't employ a state machine at all,
3987 * they are simply answered. Some peers [Ascend P50 firmware rev
3988 * 4.50] react allergically when sending IPCP requests while they are
3989 * still in authentication phase (thereby violating the standard that
3990 * demands that these NCP packets are to be discarded), so we keep
3991 * track of the peer demanding us to authenticate, and only proceed to
3992 * phase network once we've seen a positive acknowledge for the
3997 * Handle incoming CHAP packets.
4000 sppp_chap_input(struct sppp *sp, struct mbuf *m)
4003 struct lcp_header *h;
4005 u_char *value, *name, digest[AUTHKEYLEN], dsize;
4006 int value_len, name_len;
4009 len = m->m_pkthdr.len;
4013 SPP_FMT "chap invalid packet length: %d bytes\n",
4014 SPP_ARGS(ifp), len);
4017 h = mtod (m, struct lcp_header*);
4018 if (len > ntohs (h->len))
4019 len = ntohs (h->len);
4022 /* challenge, failure and success are his authproto */
4023 case CHAP_CHALLENGE:
4024 value = 1 + (u_char*)(h+1);
4025 value_len = value[-1];
4026 name = value + value_len;
4027 name_len = len - value_len - 5;
4031 SPP_FMT "chap corrupted challenge "
4032 "<%s id=0x%x len=%d",
4034 sppp_auth_type_name(PPP_CHAP, h->type),
4035 h->ident, ntohs(h->len));
4036 sppp_print_bytes((u_char*) (h+1), len-4);
4044 SPP_FMT "chap input <%s id=0x%x len=%d name=",
4046 sppp_auth_type_name(PPP_CHAP, h->type), h->ident,
4048 sppp_print_string((char*) name, name_len);
4049 log(-1, " value-size=%d value=", value_len);
4050 sppp_print_bytes(value, value_len);
4054 /* Compute reply value. */
4056 MD5Update(&ctx, &h->ident, 1);
4057 MD5Update(&ctx, sp->myauth.secret,
4058 sppp_strnlen(sp->myauth.secret, AUTHKEYLEN));
4059 MD5Update(&ctx, value, value_len);
4060 MD5Final(digest, &ctx);
4061 dsize = sizeof digest;
4063 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident,
4064 sizeof dsize, (const char *)&dsize,
4065 sizeof digest, digest,
4066 (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
4073 log(LOG_DEBUG, SPP_FMT "chap success",
4077 sppp_print_string((char*)(h + 1), len - 4);
4082 sp->pp_flags &= ~PP_NEEDAUTH;
4083 if (sp->myauth.proto == PPP_CHAP &&
4084 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
4085 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) {
4087 * We are authenticator for CHAP but didn't
4088 * complete yet. Leave it to tlu to proceed
4095 sppp_phase_network(sp);
4100 log(LOG_INFO, SPP_FMT "chap failure",
4104 sppp_print_string((char*)(h + 1), len - 4);
4108 log(LOG_INFO, SPP_FMT "chap failure\n",
4110 /* await LCP shutdown by authenticator */
4113 /* response is my authproto */
4115 value = 1 + (u_char*)(h+1);
4116 value_len = value[-1];
4117 name = value + value_len;
4118 name_len = len - value_len - 5;
4122 SPP_FMT "chap corrupted response "
4123 "<%s id=0x%x len=%d",
4125 sppp_auth_type_name(PPP_CHAP, h->type),
4126 h->ident, ntohs(h->len));
4127 sppp_print_bytes((u_char*)(h+1), len-4);
4132 if (h->ident != sp->confid[IDX_CHAP]) {
4135 SPP_FMT "chap dropping response for old ID "
4136 "(got %d, expected %d)\n",
4138 h->ident, sp->confid[IDX_CHAP]);
4141 if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN)
4142 || bcmp(name, sp->hisauth.name, name_len) != 0) {
4143 log(LOG_INFO, SPP_FMT "chap response, his name ",
4145 sppp_print_string(name, name_len);
4146 log(-1, " != expected ");
4147 sppp_print_string(sp->hisauth.name,
4148 sppp_strnlen(sp->hisauth.name, AUTHNAMELEN));
4152 log(LOG_DEBUG, SPP_FMT "chap input(%s) "
4153 "<%s id=0x%x len=%d name=",
4155 sppp_state_name(sp->state[IDX_CHAP]),
4156 sppp_auth_type_name(PPP_CHAP, h->type),
4157 h->ident, ntohs (h->len));
4158 sppp_print_string((char*)name, name_len);
4159 log(-1, " value-size=%d value=", value_len);
4160 sppp_print_bytes(value, value_len);
4163 if (value_len != AUTHKEYLEN) {
4166 SPP_FMT "chap bad hash value length: "
4167 "%d bytes, should be %d\n",
4168 SPP_ARGS(ifp), value_len,
4174 MD5Update(&ctx, &h->ident, 1);
4175 MD5Update(&ctx, sp->hisauth.secret,
4176 sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN));
4177 MD5Update(&ctx, sp->myauth.challenge, AUTHKEYLEN);
4178 MD5Final(digest, &ctx);
4180 #define FAILMSG "Failed..."
4181 #define SUCCMSG "Welcome!"
4183 if (value_len != sizeof digest ||
4184 bcmp(digest, value, value_len) != 0) {
4185 /* action scn, tld */
4186 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident,
4187 sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
4192 /* action sca, perhaps tlu */
4193 if (sp->state[IDX_CHAP] == STATE_REQ_SENT ||
4194 sp->state[IDX_CHAP] == STATE_OPENED)
4195 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident,
4196 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
4198 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) {
4199 sppp_cp_change_state(&chap, sp, STATE_OPENED);
4205 /* Unknown CHAP packet type -- ignore. */
4207 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) "
4208 "<0x%x id=0x%xh len=%d",
4210 sppp_state_name(sp->state[IDX_CHAP]),
4211 h->type, h->ident, ntohs(h->len));
4212 sppp_print_bytes((u_char*)(h+1), len-4);
4221 sppp_chap_init(struct sppp *sp)
4223 /* Chap doesn't have STATE_INITIAL at all. */
4224 sp->state[IDX_CHAP] = STATE_CLOSED;
4225 sp->fail_counter[IDX_CHAP] = 0;
4226 sp->pp_seq[IDX_CHAP] = 0;
4227 sp->pp_rseq[IDX_CHAP] = 0;
4228 callout_init(&sp->ch[IDX_CHAP], CALLOUT_MPSAFE);
4232 sppp_chap_open(struct sppp *sp)
4234 if (sp->myauth.proto == PPP_CHAP &&
4235 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
4236 /* we are authenticator for CHAP, start it */
4238 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4239 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
4241 /* nothing to be done if we are peer, await a challenge */
4245 sppp_chap_close(struct sppp *sp)
4247 if (sp->state[IDX_CHAP] != STATE_CLOSED)
4248 sppp_cp_change_state(&chap, sp, STATE_CLOSED);
4252 sppp_chap_TO(void *cookie)
4254 struct sppp *sp = (struct sppp *)cookie;
4259 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n",
4261 sppp_state_name(sp->state[IDX_CHAP]),
4262 sp->rst_counter[IDX_CHAP]);
4264 if (--sp->rst_counter[IDX_CHAP] < 0)
4266 switch (sp->state[IDX_CHAP]) {
4267 case STATE_REQ_SENT:
4269 sppp_cp_change_state(&chap, sp, STATE_CLOSED);
4273 /* TO+ (or TO*) event */
4274 switch (sp->state[IDX_CHAP]) {
4277 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4279 case STATE_REQ_SENT:
4281 /* sppp_cp_change_state() will restart the timer */
4282 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
4290 sppp_chap_tlu(struct sppp *sp)
4296 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4299 * Some broken CHAP implementations (Conware CoNet, firmware
4300 * 4.0.?) don't want to re-authenticate their CHAP once the
4301 * initial challenge-response exchange has taken place.
4302 * Provide for an option to avoid rechallenges.
4304 if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0) {
4306 * Compute the re-challenge timeout. This will yield
4307 * a number between 300 and 810 seconds.
4309 i = 300 + ((unsigned)(random() & 0xff00) >> 7);
4310 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, (void *)sp);
4315 SPP_FMT "chap %s, ",
4317 sp->pp_phase == PHASE_NETWORK? "reconfirmed": "tlu");
4318 if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0)
4319 log(-1, "next re-challenge in %d seconds\n", i);
4321 log(-1, "re-challenging supressed\n");
4325 /* indicate to LCP that we need to be closed down */
4326 sp->lcp.protos |= (1 << IDX_CHAP);
4328 if (sp->pp_flags & PP_NEEDAUTH) {
4330 * Remote is authenticator, but his auth proto didn't
4331 * complete yet. Defer the transition to network
4340 * If we are already in phase network, we are done here. This
4341 * is the case if this is a dummy tlu event after a re-challenge.
4343 if (sp->pp_phase != PHASE_NETWORK)
4344 sppp_phase_network(sp);
4348 sppp_chap_tld(struct sppp *sp)
4353 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp));
4354 callout_stop(&sp->ch[IDX_CHAP]);
4355 sp->lcp.protos &= ~(1 << IDX_CHAP);
4361 sppp_chap_scr(struct sppp *sp)
4366 /* Compute random challenge. */
4367 ch = (u_long *)sp->myauth.challenge;
4368 read_random(&seed, sizeof seed);
4369 ch[0] = seed ^ random();
4370 ch[1] = seed ^ random();
4371 ch[2] = seed ^ random();
4372 ch[3] = seed ^ random();
4375 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP];
4377 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP],
4378 sizeof clen, (const char *)&clen,
4379 (size_t)AUTHKEYLEN, sp->myauth.challenge,
4380 (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
4386 *--------------------------------------------------------------------------*
4388 * The PAP implementation. *
4390 *--------------------------------------------------------------------------*
4393 * For PAP, we need to keep a little state also if we are the peer, not the
4394 * authenticator. This is since we don't get a request to authenticate, but
4395 * have to repeatedly authenticate ourself until we got a response (or the
4396 * retry counter is expired).
4400 * Handle incoming PAP packets. */
4402 sppp_pap_input(struct sppp *sp, struct mbuf *m)
4405 struct lcp_header *h;
4407 u_char *name, *passwd, mlen;
4408 int name_len, passwd_len;
4410 len = m->m_pkthdr.len;
4414 SPP_FMT "pap invalid packet length: %d bytes\n",
4415 SPP_ARGS(ifp), len);
4418 h = mtod (m, struct lcp_header*);
4419 if (len > ntohs (h->len))
4420 len = ntohs (h->len);
4422 /* PAP request is my authproto */
4424 name = 1 + (u_char*)(h+1);
4425 name_len = name[-1];
4426 passwd = name + name_len + 1;
4427 if (name_len > len - 6 ||
4428 (passwd_len = passwd[-1]) > len - 6 - name_len) {
4430 log(LOG_DEBUG, SPP_FMT "pap corrupted input "
4431 "<%s id=0x%x len=%d",
4433 sppp_auth_type_name(PPP_PAP, h->type),
4434 h->ident, ntohs(h->len));
4435 sppp_print_bytes((u_char*)(h+1), len-4);
4441 log(LOG_DEBUG, SPP_FMT "pap input(%s) "
4442 "<%s id=0x%x len=%d name=",
4444 sppp_state_name(sp->state[IDX_PAP]),
4445 sppp_auth_type_name(PPP_PAP, h->type),
4446 h->ident, ntohs(h->len));
4447 sppp_print_string((char*)name, name_len);
4448 log(-1, " passwd=");
4449 sppp_print_string((char*)passwd, passwd_len);
4452 if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN) ||
4453 passwd_len != sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN) ||
4454 bcmp(name, sp->hisauth.name, name_len) != 0 ||
4455 bcmp(passwd, sp->hisauth.secret, passwd_len) != 0) {
4456 /* action scn, tld */
4457 mlen = sizeof(FAILMSG) - 1;
4458 sppp_auth_send(&pap, sp, PAP_NAK, h->ident,
4459 sizeof mlen, (const char *)&mlen,
4460 sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
4465 /* action sca, perhaps tlu */
4466 if (sp->state[IDX_PAP] == STATE_REQ_SENT ||
4467 sp->state[IDX_PAP] == STATE_OPENED) {
4468 mlen = sizeof(SUCCMSG) - 1;
4469 sppp_auth_send(&pap, sp, PAP_ACK, h->ident,
4470 sizeof mlen, (const char *)&mlen,
4471 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
4474 if (sp->state[IDX_PAP] == STATE_REQ_SENT) {
4475 sppp_cp_change_state(&pap, sp, STATE_OPENED);
4480 /* ack and nak are his authproto */
4482 callout_stop(&sp->pap_my_to_ch);
4484 log(LOG_DEBUG, SPP_FMT "pap success",
4486 name_len = *((char *)h);
4487 if (len > 5 && name_len) {
4489 sppp_print_string((char*)(h+1), name_len);
4494 sp->pp_flags &= ~PP_NEEDAUTH;
4495 if (sp->myauth.proto == PPP_PAP &&
4496 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
4497 (sp->lcp.protos & (1 << IDX_PAP)) == 0) {
4499 * We are authenticator for PAP but didn't
4500 * complete yet. Leave it to tlu to proceed
4507 sppp_phase_network(sp);
4511 callout_stop (&sp->pap_my_to_ch);
4513 log(LOG_INFO, SPP_FMT "pap failure",
4515 name_len = *((char *)h);
4516 if (len > 5 && name_len) {
4518 sppp_print_string((char*)(h+1), name_len);
4522 log(LOG_INFO, SPP_FMT "pap failure\n",
4524 /* await LCP shutdown by authenticator */
4528 /* Unknown PAP packet type -- ignore. */
4530 log(LOG_DEBUG, SPP_FMT "pap corrupted input "
4531 "<0x%x id=0x%x len=%d",
4533 h->type, h->ident, ntohs(h->len));
4534 sppp_print_bytes((u_char*)(h+1), len-4);
4543 sppp_pap_init(struct sppp *sp)
4545 /* PAP doesn't have STATE_INITIAL at all. */
4546 sp->state[IDX_PAP] = STATE_CLOSED;
4547 sp->fail_counter[IDX_PAP] = 0;
4548 sp->pp_seq[IDX_PAP] = 0;
4549 sp->pp_rseq[IDX_PAP] = 0;
4550 callout_init(&sp->ch[IDX_PAP], CALLOUT_MPSAFE);
4551 callout_init(&sp->pap_my_to_ch, CALLOUT_MPSAFE);
4555 sppp_pap_open(struct sppp *sp)
4557 if (sp->hisauth.proto == PPP_PAP &&
4558 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
4559 /* we are authenticator for PAP, start our timer */
4560 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
4561 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
4563 if (sp->myauth.proto == PPP_PAP) {
4564 /* we are peer, send a request, and start a timer */
4566 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout,
4567 sppp_pap_my_TO, (void *)sp);
4572 sppp_pap_close(struct sppp *sp)
4574 if (sp->state[IDX_PAP] != STATE_CLOSED)
4575 sppp_cp_change_state(&pap, sp, STATE_CLOSED);
4579 * That's the timeout routine if we are authenticator. Since the
4580 * authenticator is basically passive in PAP, we can't do much here.
4583 sppp_pap_TO(void *cookie)
4585 struct sppp *sp = (struct sppp *)cookie;
4590 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n",
4592 sppp_state_name(sp->state[IDX_PAP]),
4593 sp->rst_counter[IDX_PAP]);
4595 if (--sp->rst_counter[IDX_PAP] < 0)
4597 switch (sp->state[IDX_PAP]) {
4598 case STATE_REQ_SENT:
4600 sppp_cp_change_state(&pap, sp, STATE_CLOSED);
4604 /* TO+ event, not very much we could do */
4605 switch (sp->state[IDX_PAP]) {
4606 case STATE_REQ_SENT:
4607 /* sppp_cp_change_state() will restart the timer */
4608 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
4616 * That's the timeout handler if we are peer. Since the peer is active,
4617 * we need to retransmit our PAP request since it is apparently lost.
4618 * XXX We should impose a max counter.
4621 sppp_pap_my_TO(void *cookie)
4623 struct sppp *sp = (struct sppp *)cookie;
4627 log(LOG_DEBUG, SPP_FMT "pap peer TO\n",
4636 sppp_pap_tlu(struct sppp *sp)
4640 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
4643 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
4644 SPP_ARGS(ifp), pap.name);
4647 /* indicate to LCP that we need to be closed down */
4648 sp->lcp.protos |= (1 << IDX_PAP);
4650 if (sp->pp_flags & PP_NEEDAUTH) {
4652 * Remote is authenticator, but his auth proto didn't
4653 * complete yet. Defer the transition to network
4660 sppp_phase_network(sp);
4664 sppp_pap_tld(struct sppp *sp)
4669 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp));
4670 callout_stop (&sp->ch[IDX_PAP]);
4671 callout_stop (&sp->pap_my_to_ch);
4672 sp->lcp.protos &= ~(1 << IDX_PAP);
4678 sppp_pap_scr(struct sppp *sp)
4680 u_char idlen, pwdlen;
4682 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP];
4683 pwdlen = sppp_strnlen(sp->myauth.secret, AUTHKEYLEN);
4684 idlen = sppp_strnlen(sp->myauth.name, AUTHNAMELEN);
4686 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP],
4687 sizeof idlen, (const char *)&idlen,
4688 (size_t)idlen, sp->myauth.name,
4689 sizeof pwdlen, (const char *)&pwdlen,
4690 (size_t)pwdlen, sp->myauth.secret,
4695 * Random miscellaneous functions.
4699 * Send a PAP or CHAP proto packet.
4701 * Varadic function, each of the elements for the ellipsis is of type
4702 * ``size_t mlen, const u_char *msg''. Processing will stop iff
4704 * NOTE: never declare variadic functions with types subject to type
4705 * promotion (i.e. u_char). This is asking for big trouble depending
4706 * on the architecture you are on...
4710 sppp_auth_send(const struct cp *cp, struct sppp *sp,
4711 unsigned int type, unsigned int id,
4715 struct ppp_header *h;
4716 struct lcp_header *lh;
4724 MGETHDR (m, M_NOWAIT, MT_DATA);
4727 m->m_pkthdr.rcvif = 0;
4729 h = mtod (m, struct ppp_header*);
4730 h->address = PPP_ALLSTATIONS; /* broadcast address */
4731 h->control = PPP_UI; /* Unnumbered Info */
4732 h->protocol = htons(cp->proto);
4734 lh = (struct lcp_header*)(h + 1);
4737 p = (u_char*) (lh+1);
4742 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) {
4743 msg = va_arg(ap, const char *);
4745 if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN) {
4751 bcopy(msg, p, mlen);
4756 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
4757 lh->len = htons (LCP_HEADER_LEN + len);
4760 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
4761 SPP_ARGS(ifp), cp->name,
4762 sppp_auth_type_name(cp->proto, lh->type),
4763 lh->ident, ntohs(lh->len));
4764 sppp_print_bytes((u_char*) (lh+1), len);
4767 if (! IF_HANDOFF_ADJ(&sp->pp_cpq, m, ifp, 3))
4772 * Flush interface queue.
4775 sppp_qflush(struct ifqueue *ifq)
4790 * Send keepalive packets, every 10 seconds.
4793 sppp_keepalive(void *dummy)
4795 struct sppp *sp = (struct sppp*)dummy;
4796 struct ifnet *ifp = SP2IFP(sp);
4799 /* Keepalive mode disabled or channel down? */
4800 if (! (sp->pp_flags & PP_KEEPALIVE) ||
4801 ! (ifp->if_drv_flags & IFF_DRV_RUNNING))
4804 if (sp->pp_mode == PP_FR) {
4805 sppp_fr_keepalive (sp);
4809 /* No keepalive in PPP mode if LCP not opened yet. */
4810 if (sp->pp_mode != IFF_CISCO &&
4811 sp->pp_phase < PHASE_AUTHENTICATE)
4814 if (sp->pp_alivecnt == MAXALIVECNT) {
4815 /* No keepalive packets got. Stop the interface. */
4816 printf (SPP_FMT "down\n", SPP_ARGS(ifp));
4818 sppp_qflush (&sp->pp_cpq);
4819 if (sp->pp_mode != IFF_CISCO) {
4821 /* Shut down the PPP link. */
4823 /* Initiate negotiation. XXX */
4827 if (sp->pp_alivecnt <= MAXALIVECNT)
4829 if (sp->pp_mode == IFF_CISCO)
4830 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ,
4831 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]);
4832 else if (sp->pp_phase >= PHASE_AUTHENTICATE) {
4833 long nmagic = htonl (sp->lcp.magic);
4834 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP];
4835 sppp_cp_send (sp, PPP_LCP, ECHO_REQ,
4836 sp->lcp.echoid, 4, &nmagic);
4840 callout_reset(&sp->keepalive_callout, hz * 10, sppp_keepalive,
4845 * Get both IP addresses.
4848 sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst, u_long *srcmask)
4850 struct ifnet *ifp = SP2IFP(sp);
4852 struct sockaddr_in *si, *sm;
4858 * Pick the first AF_INET address from the list,
4859 * aliases don't make any sense on a p2p link anyway.
4863 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
4864 if (ifa->ifa_addr->sa_family == AF_INET) {
4865 si = (struct sockaddr_in *)ifa->ifa_addr;
4866 sm = (struct sockaddr_in *)ifa->ifa_netmask;
4871 if (si && si->sin_addr.s_addr) {
4872 ssrc = si->sin_addr.s_addr;
4874 *srcmask = ntohl(sm->sin_addr.s_addr);
4877 si = (struct sockaddr_in *)ifa->ifa_dstaddr;
4878 if (si && si->sin_addr.s_addr)
4879 ddst = si->sin_addr.s_addr;
4881 if_addr_runlock(ifp);
4883 if (dst) *dst = ntohl(ddst);
4884 if (src) *src = ntohl(ssrc);
4889 * Set my IP address.
4892 sppp_set_ip_addr(struct sppp *sp, u_long src)
4896 struct sockaddr_in *si;
4897 struct in_ifaddr *ia;
4900 * Pick the first AF_INET address from the list,
4901 * aliases don't make any sense on a p2p link anyway.
4905 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
4906 if (ifa->ifa_addr->sa_family == AF_INET) {
4907 si = (struct sockaddr_in *)ifa->ifa_addr;
4914 if_addr_runlock(ifp);
4919 /* delete old route */
4920 error = rtinit(ifa, (int)RTM_DELETE, RTF_HOST);
4921 if (debug && error) {
4922 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit DEL failed, error=%d\n",
4923 SPP_ARGS(ifp), error);
4926 /* set new address */
4927 si->sin_addr.s_addr = htonl(src);
4930 LIST_REMOVE(ia, ia_hash);
4931 LIST_INSERT_HEAD(INADDR_HASH(si->sin_addr.s_addr), ia, ia_hash);
4932 IN_IFADDR_WUNLOCK();
4935 error = rtinit(ifa, (int)RTM_ADD, RTF_HOST);
4936 if (debug && error) {
4937 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit ADD failed, error=%d",
4938 SPP_ARGS(ifp), error);
4947 * Get both IPv6 addresses.
4950 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst,
4951 struct in6_addr *srcmask)
4953 struct ifnet *ifp = SP2IFP(sp);
4955 struct sockaddr_in6 *si, *sm;
4956 struct in6_addr ssrc, ddst;
4959 bzero(&ssrc, sizeof(ssrc));
4960 bzero(&ddst, sizeof(ddst));
4962 * Pick the first link-local AF_INET6 address from the list,
4963 * aliases don't make any sense on a p2p link anyway.
4967 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
4968 if (ifa->ifa_addr->sa_family == AF_INET6) {
4969 si = (struct sockaddr_in6 *)ifa->ifa_addr;
4970 sm = (struct sockaddr_in6 *)ifa->ifa_netmask;
4971 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr))
4975 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) {
4976 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc));
4978 bcopy(&sm->sin6_addr, srcmask,
4983 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr;
4984 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr))
4985 bcopy(&si->sin6_addr, &ddst, sizeof(ddst));
4989 bcopy(&ddst, dst, sizeof(*dst));
4991 bcopy(&ssrc, src, sizeof(*src));
4992 if_addr_runlock(ifp);
4995 #ifdef IPV6CP_MYIFID_DYN
4997 * Generate random ifid.
5000 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr)
5006 * Set my IPv6 address.
5009 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src)
5013 struct sockaddr_in6 *sin6;
5016 * Pick the first link-local AF_INET6 address from the list,
5017 * aliases don't make any sense on a p2p link anyway.
5022 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
5023 if (ifa->ifa_addr->sa_family == AF_INET6) {
5024 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
5025 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
5031 if_addr_runlock(ifp);
5035 struct sockaddr_in6 new_sin6 = *sin6;
5037 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr));
5038 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1);
5039 if (debug && error) {
5040 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit "
5041 " failed, error=%d\n", SPP_ARGS(ifp), error);
5049 * Suggest a candidate address to be used by peer.
5052 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest)
5054 struct in6_addr myaddr;
5057 sppp_get_ip6_addrs(sp, &myaddr, 0, 0);
5059 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */
5061 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) {
5062 myaddr.s6_addr[14] ^= 0xff;
5063 myaddr.s6_addr[15] ^= 0xff;
5065 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff);
5066 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff);
5069 bcopy(&myaddr, suggest, sizeof(myaddr));
5074 sppp_params(struct sppp *sp, u_long cmd, void *data)
5077 struct ifreq *ifr = (struct ifreq *)data;
5078 struct spppreq *spr;
5081 if ((spr = malloc(sizeof(struct spppreq), M_TEMP, M_NOWAIT)) == 0)
5084 * ifr->ifr_data is supposed to point to a struct spppreq.
5085 * Check the cmd word first before attempting to fetch all the
5088 if ((subcmd = fuword(ifr->ifr_data)) == -1) {
5093 if (copyin((caddr_t)ifr->ifr_data, spr, sizeof(struct spppreq)) != 0) {
5099 case (u_long)SPPPIOGDEFS:
5100 if (cmd != SIOCGIFGENERIC) {
5105 * We copy over the entire current state, but clean
5106 * out some of the stuff we don't wanna pass up.
5107 * Remember, SIOCGIFGENERIC is unprotected, and can be
5108 * called by any user. No need to ever get PAP or
5109 * CHAP secrets back to userland anyway.
5111 spr->defs.pp_phase = sp->pp_phase;
5112 spr->defs.enable_vj = (sp->confflags & CONF_ENABLE_VJ) != 0;
5113 spr->defs.enable_ipv6 = (sp->confflags & CONF_ENABLE_IPV6) != 0;
5114 spr->defs.lcp = sp->lcp;
5115 spr->defs.ipcp = sp->ipcp;
5116 spr->defs.ipv6cp = sp->ipv6cp;
5117 spr->defs.myauth = sp->myauth;
5118 spr->defs.hisauth = sp->hisauth;
5119 bzero(spr->defs.myauth.secret, AUTHKEYLEN);
5120 bzero(spr->defs.myauth.challenge, AUTHKEYLEN);
5121 bzero(spr->defs.hisauth.secret, AUTHKEYLEN);
5122 bzero(spr->defs.hisauth.challenge, AUTHKEYLEN);
5124 * Fixup the LCP timeout value to milliseconds so
5125 * spppcontrol doesn't need to bother about the value
5126 * of "hz". We do the reverse calculation below when
5129 spr->defs.lcp.timeout = sp->lcp.timeout * 1000 / hz;
5130 rv = copyout(spr, (caddr_t)ifr->ifr_data,
5131 sizeof(struct spppreq));
5134 case (u_long)SPPPIOSDEFS:
5135 if (cmd != SIOCSIFGENERIC) {
5140 * We have a very specific idea of which fields we
5141 * allow being passed back from userland, so to not
5142 * clobber our current state. For one, we only allow
5143 * setting anything if LCP is in dead or establish
5144 * phase. Once the authentication negotiations
5145 * started, the authentication settings must not be
5146 * changed again. (The administrator can force an
5147 * ifconfig down in order to get LCP back into dead
5150 * Also, we only allow for authentication parameters to be
5153 * XXX Should allow to set or clear pp_flags.
5155 * Finally, if the respective authentication protocol to
5156 * be used is set differently than 0, but the secret is
5157 * passed as all zeros, we don't trash the existing secret.
5158 * This allows an administrator to change the system name
5159 * only without clobbering the secret (which he didn't get
5160 * back in a previous SPPPIOGDEFS call). However, the
5161 * secrets are cleared if the authentication protocol is
5163 if (sp->pp_phase != PHASE_DEAD &&
5164 sp->pp_phase != PHASE_ESTABLISH) {
5169 if ((spr->defs.myauth.proto != 0 && spr->defs.myauth.proto != PPP_PAP &&
5170 spr->defs.myauth.proto != PPP_CHAP) ||
5171 (spr->defs.hisauth.proto != 0 && spr->defs.hisauth.proto != PPP_PAP &&
5172 spr->defs.hisauth.proto != PPP_CHAP)) {
5177 if (spr->defs.myauth.proto == 0)
5178 /* resetting myauth */
5179 bzero(&sp->myauth, sizeof sp->myauth);
5181 /* setting/changing myauth */
5182 sp->myauth.proto = spr->defs.myauth.proto;
5183 bcopy(spr->defs.myauth.name, sp->myauth.name, AUTHNAMELEN);
5184 if (spr->defs.myauth.secret[0] != '\0')
5185 bcopy(spr->defs.myauth.secret, sp->myauth.secret,
5188 if (spr->defs.hisauth.proto == 0)
5189 /* resetting hisauth */
5190 bzero(&sp->hisauth, sizeof sp->hisauth);
5192 /* setting/changing hisauth */
5193 sp->hisauth.proto = spr->defs.hisauth.proto;
5194 sp->hisauth.flags = spr->defs.hisauth.flags;
5195 bcopy(spr->defs.hisauth.name, sp->hisauth.name, AUTHNAMELEN);
5196 if (spr->defs.hisauth.secret[0] != '\0')
5197 bcopy(spr->defs.hisauth.secret, sp->hisauth.secret,
5200 /* set LCP restart timer timeout */
5201 if (spr->defs.lcp.timeout != 0)
5202 sp->lcp.timeout = spr->defs.lcp.timeout * hz / 1000;
5203 /* set VJ enable and IPv6 disable flags */
5205 if (spr->defs.enable_vj)
5206 sp->confflags |= CONF_ENABLE_VJ;
5208 sp->confflags &= ~CONF_ENABLE_VJ;
5211 if (spr->defs.enable_ipv6)
5212 sp->confflags |= CONF_ENABLE_IPV6;
5214 sp->confflags &= ~CONF_ENABLE_IPV6;
5229 sppp_phase_network(struct sppp *sp)
5235 sp->pp_phase = PHASE_NETWORK;
5238 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
5239 sppp_phase_name(sp->pp_phase));
5241 /* Notify NCPs now. */
5242 for (i = 0; i < IDX_COUNT; i++)
5243 if ((cps[i])->flags & CP_NCP)
5246 /* Send Up events to all NCPs. */
5247 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
5248 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP))
5251 /* if no NCP is starting, all this was in vain, close down */
5252 sppp_lcp_check_and_close(sp);
5257 sppp_cp_type_name(u_char type)
5259 static char buf[12];
5261 case CONF_REQ: return "conf-req";
5262 case CONF_ACK: return "conf-ack";
5263 case CONF_NAK: return "conf-nak";
5264 case CONF_REJ: return "conf-rej";
5265 case TERM_REQ: return "term-req";
5266 case TERM_ACK: return "term-ack";
5267 case CODE_REJ: return "code-rej";
5268 case PROTO_REJ: return "proto-rej";
5269 case ECHO_REQ: return "echo-req";
5270 case ECHO_REPLY: return "echo-reply";
5271 case DISC_REQ: return "discard-req";
5273 snprintf (buf, sizeof(buf), "cp/0x%x", type);
5278 sppp_auth_type_name(u_short proto, u_char type)
5280 static char buf[12];
5284 case CHAP_CHALLENGE: return "challenge";
5285 case CHAP_RESPONSE: return "response";
5286 case CHAP_SUCCESS: return "success";
5287 case CHAP_FAILURE: return "failure";
5291 case PAP_REQ: return "req";
5292 case PAP_ACK: return "ack";
5293 case PAP_NAK: return "nak";
5296 snprintf (buf, sizeof(buf), "auth/0x%x", type);
5301 sppp_lcp_opt_name(u_char opt)
5303 static char buf[12];
5305 case LCP_OPT_MRU: return "mru";
5306 case LCP_OPT_ASYNC_MAP: return "async-map";
5307 case LCP_OPT_AUTH_PROTO: return "auth-proto";
5308 case LCP_OPT_QUAL_PROTO: return "qual-proto";
5309 case LCP_OPT_MAGIC: return "magic";
5310 case LCP_OPT_PROTO_COMP: return "proto-comp";
5311 case LCP_OPT_ADDR_COMP: return "addr-comp";
5313 snprintf (buf, sizeof(buf), "lcp/0x%x", opt);
5319 sppp_ipcp_opt_name(u_char opt)
5321 static char buf[12];
5323 case IPCP_OPT_ADDRESSES: return "addresses";
5324 case IPCP_OPT_COMPRESSION: return "compression";
5325 case IPCP_OPT_ADDRESS: return "address";
5327 snprintf (buf, sizeof(buf), "ipcp/0x%x", opt);
5334 sppp_ipv6cp_opt_name(u_char opt)
5336 static char buf[12];
5338 case IPV6CP_OPT_IFID: return "ifid";
5339 case IPV6CP_OPT_COMPRESSION: return "compression";
5341 sprintf (buf, "0x%x", opt);
5347 sppp_state_name(int state)
5350 case STATE_INITIAL: return "initial";
5351 case STATE_STARTING: return "starting";
5352 case STATE_CLOSED: return "closed";
5353 case STATE_STOPPED: return "stopped";
5354 case STATE_CLOSING: return "closing";
5355 case STATE_STOPPING: return "stopping";
5356 case STATE_REQ_SENT: return "req-sent";
5357 case STATE_ACK_RCVD: return "ack-rcvd";
5358 case STATE_ACK_SENT: return "ack-sent";
5359 case STATE_OPENED: return "opened";
5365 sppp_phase_name(enum ppp_phase phase)
5368 case PHASE_DEAD: return "dead";
5369 case PHASE_ESTABLISH: return "establish";
5370 case PHASE_TERMINATE: return "terminate";
5371 case PHASE_AUTHENTICATE: return "authenticate";
5372 case PHASE_NETWORK: return "network";
5378 sppp_proto_name(u_short proto)
5380 static char buf[12];
5382 case PPP_LCP: return "lcp";
5383 case PPP_IPCP: return "ipcp";
5384 case PPP_PAP: return "pap";
5385 case PPP_CHAP: return "chap";
5386 case PPP_IPV6CP: return "ipv6cp";
5388 snprintf(buf, sizeof(buf), "proto/0x%x", (unsigned)proto);
5393 sppp_print_bytes(const u_char *p, u_short len)
5396 log(-1, " %*D", len, p, "-");
5400 sppp_print_string(const char *p, u_short len)
5407 * Print only ASCII chars directly. RFC 1994 recommends
5408 * using only them, but we don't rely on it. */
5409 if (c < ' ' || c > '~')
5410 log(-1, "\\x%x", c);
5418 sppp_dotted_quad(u_long addr)
5421 sprintf(s, "%d.%d.%d.%d",
5422 (int)((addr >> 24) & 0xff),
5423 (int)((addr >> 16) & 0xff),
5424 (int)((addr >> 8) & 0xff),
5425 (int)(addr & 0xff));
5431 sppp_strnlen(u_char *p, int max)
5435 for (len = 0; len < max && *p; ++p)
5440 /* a dummy, used to drop uninteresting events */
5442 sppp_null(struct sppp *unused)
5444 /* do just nothing */