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>
39 #include <sys/vimage.h>
44 #include <net/netisr.h>
45 #include <net/if_types.h>
46 #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 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 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_DONTWAIT);
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)
741 if (netisr_queue(isr, m)) { /* (0) on success. */
743 log(LOG_DEBUG, SPP_FMT "protocol queue overflow\n",
750 * Do only account for network packets, not for control
751 * packets. This is used by some subsystems to detect
754 sp->pp_last_recv = time_uptime;
758 sppp_ifstart_sched(void *dummy)
760 struct sppp *sp = dummy;
762 sp->if_start(SP2IFP(sp));
765 /* if_start () wrapper function. We use it to schedule real if_start () for
766 * execution. We can't call it directly
769 sppp_ifstart(struct ifnet *ifp)
771 struct sppp *sp = IFP2SP(ifp);
773 if (SPPP_LOCK_OWNED(sp)) {
774 if (callout_pending(&sp->ifstart_callout))
776 callout_reset(&sp->ifstart_callout, 1, sppp_ifstart_sched,
784 * Enqueue transmit packet.
787 sppp_output(struct ifnet *ifp, struct mbuf *m,
788 struct sockaddr *dst, struct route *ro)
790 struct sppp *sp = IFP2SP(ifp);
791 struct ppp_header *h;
792 struct ifqueue *ifq = NULL;
793 int s, error, rv = 0;
795 int ipproto = PPP_IP;
797 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))) {
814 if ((ifp->if_flags & IFF_AUTO) &&
815 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
820 * Hack to prevent the initialization-time generated
821 * IPv6 multicast packet to erroneously cause a
822 * dialout event in case IPv6 has been
823 * administratively disabled on that interface.
825 if (dst->sa_family == AF_INET6 &&
826 !(sp->confflags & CONF_ENABLE_IPV6))
830 * Interface is not yet running, but auto-dial. Need
831 * to start LCP for it.
833 ifp->if_drv_flags |= IFF_DRV_RUNNING;
840 if (dst->sa_family == AF_INET) {
841 /* XXX Check mbuf length here? */
842 struct ip *ip = mtod (m, struct ip*);
843 struct tcphdr *tcp = (struct tcphdr*) ((long*)ip + ip->ip_hl);
846 * When using dynamic local IP address assignment by using
847 * 0.0.0.0 as a local address, the first TCP session will
848 * not connect because the local TCP checksum is computed
849 * using 0.0.0.0 which will later become our real IP address
850 * so the TCP checksum computed at the remote end will
851 * become invalid. So we
852 * - don't let packets with src ip addr 0 thru
853 * - we flag TCP packets with src ip 0 as an error
856 if(ip->ip_src.s_addr == INADDR_ANY) /* -hm */
861 if(ip->ip_p == IPPROTO_TCP)
862 return(EADDRNOTAVAIL);
868 * Put low delay, telnet, rlogin and ftp control packets
869 * in front of the queue or let ALTQ take care.
871 if (ALTQ_IS_ENABLED(&ifp->if_snd))
873 else if (_IF_QFULL(&sp->pp_fastq))
875 else if (ip->ip_tos & IPTOS_LOWDELAY)
877 else if (m->m_len < sizeof *ip + sizeof *tcp)
879 else if (ip->ip_p != IPPROTO_TCP)
881 else if (INTERACTIVE (ntohs (tcp->th_sport)))
883 else if (INTERACTIVE (ntohs (tcp->th_dport)))
887 * Do IP Header compression
889 if (sp->pp_mode != IFF_CISCO && sp->pp_mode != PP_FR &&
890 (sp->ipcp.flags & IPCP_VJ) && ip->ip_p == IPPROTO_TCP)
891 switch (sl_compress_tcp(m, ip, sp->pp_comp,
892 sp->ipcp.compress_cid)) {
893 case TYPE_COMPRESSED_TCP:
894 ipproto = PPP_VJ_COMP;
896 case TYPE_UNCOMPRESSED_TCP:
897 ipproto = PPP_VJ_UCOMP;
912 if (dst->sa_family == AF_INET6) {
913 /* XXX do something tricky here? */
917 if (sp->pp_mode == PP_FR) {
918 /* Add frame relay header. */
919 m = sppp_fr_header (sp, m, dst->sa_family);
926 * Prepend general data packet PPP header. For now, IP only.
928 M_PREPEND (m, PPP_HEADER_LEN, M_DONTWAIT);
931 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n",
939 * May want to check size of packet
940 * (albeit due to the implementation it's always enough)
942 h = mtod (m, struct ppp_header*);
943 if (sp->pp_mode == IFF_CISCO) {
944 h->address = CISCO_UNICAST; /* unicast address */
947 h->address = PPP_ALLSTATIONS; /* broadcast address */
948 h->control = PPP_UI; /* Unnumbered Info */
951 switch (dst->sa_family) {
953 case AF_INET: /* Internet Protocol */
954 if (sp->pp_mode == IFF_CISCO)
955 h->protocol = htons (ETHERTYPE_IP);
958 * Don't choke with an ENETDOWN early. It's
959 * possible that we just started dialing out,
960 * so don't drop the packet immediately. If
961 * we notice that we run out of buffer space
962 * below, we will however remember that we are
963 * not ready to carry IP packets, and return
964 * ENETDOWN, as opposed to ENOBUFS.
966 h->protocol = htons(ipproto);
967 if (sp->state[IDX_IPCP] != STATE_OPENED)
973 case AF_INET6: /* Internet Protocol */
974 if (sp->pp_mode == IFF_CISCO)
975 h->protocol = htons (ETHERTYPE_IPV6);
978 * Don't choke with an ENETDOWN early. It's
979 * possible that we just started dialing out,
980 * so don't drop the packet immediately. If
981 * we notice that we run out of buffer space
982 * below, we will however remember that we are
983 * not ready to carry IP packets, and return
984 * ENETDOWN, as opposed to ENOBUFS.
986 h->protocol = htons(PPP_IPV6);
987 if (sp->state[IDX_IPV6CP] != STATE_OPENED)
993 case AF_IPX: /* Novell IPX Protocol */
994 h->protocol = htons (sp->pp_mode == IFF_CISCO ?
995 ETHERTYPE_IPX : PPP_IPX);
1003 return (EAFNOSUPPORT);
1007 * Queue message on interface, and start output if interface
1012 error = !(IF_HANDOFF_ADJ(ifq, m, ifp, 3));
1014 IFQ_HANDOFF_ADJ(ifp, m, 3, error);
1019 return (rv? rv: ENOBUFS);
1024 * Unlike in sppp_input(), we can always bump the timestamp
1025 * here since sppp_output() is only called on behalf of
1026 * network-layer traffic; control-layer traffic is handled
1027 * by sppp_cp_send().
1029 sp->pp_last_sent = time_uptime;
1034 sppp_attach(struct ifnet *ifp)
1036 struct sppp *sp = IFP2SP(ifp);
1038 /* Initialize mtx lock */
1039 mtx_init(&sp->mtx, "sppp", MTX_NETWORK_LOCK, MTX_DEF | MTX_RECURSE);
1041 /* Initialize keepalive handler. */
1042 callout_init(&sp->keepalive_callout, CALLOUT_MPSAFE);
1043 callout_reset(&sp->keepalive_callout, hz * 10, sppp_keepalive,
1046 ifp->if_mtu = PP_MTU;
1047 ifp->if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
1048 ifp->if_output = sppp_output;
1050 sp->pp_flags = PP_KEEPALIVE;
1052 ifp->if_snd.ifq_maxlen = 32;
1053 sp->pp_fastq.ifq_maxlen = 32;
1054 sp->pp_cpq.ifq_maxlen = 20;
1056 sp->pp_alivecnt = 0;
1057 bzero(&sp->pp_seq[0], sizeof(sp->pp_seq));
1058 bzero(&sp->pp_rseq[0], sizeof(sp->pp_rseq));
1059 sp->pp_phase = PHASE_DEAD;
1060 sp->pp_up = sppp_pp_up;
1061 sp->pp_down = sppp_pp_down;
1062 if(!mtx_initialized(&sp->pp_cpq.ifq_mtx))
1063 mtx_init(&sp->pp_cpq.ifq_mtx, "sppp_cpq", NULL, MTX_DEF);
1064 if(!mtx_initialized(&sp->pp_fastq.ifq_mtx))
1065 mtx_init(&sp->pp_fastq.ifq_mtx, "sppp_fastq", NULL, MTX_DEF);
1066 sp->pp_last_recv = sp->pp_last_sent = time_uptime;
1069 sp->confflags |= CONF_ENABLE_VJ;
1072 sp->confflags |= CONF_ENABLE_IPV6;
1074 callout_init(&sp->ifstart_callout, CALLOUT_MPSAFE);
1075 sp->if_start = ifp->if_start;
1076 ifp->if_start = sppp_ifstart;
1077 sp->pp_comp = malloc(sizeof(struct slcompress), M_TEMP, M_WAITOK);
1078 sl_compress_init(sp->pp_comp, -1);
1081 sppp_ipv6cp_init(sp);
1087 sppp_detach(struct ifnet *ifp)
1089 struct sppp *sp = IFP2SP(ifp);
1092 KASSERT(mtx_initialized(&sp->mtx), ("sppp mutex is not initialized"));
1094 /* Stop keepalive handler. */
1095 if (!callout_drain(&sp->keepalive_callout))
1096 callout_stop(&sp->keepalive_callout);
1098 for (i = 0; i < IDX_COUNT; i++) {
1099 if (!callout_drain(&sp->ch[i]))
1100 callout_stop(&sp->ch[i]);
1102 if (!callout_drain(&sp->pap_my_to_ch))
1103 callout_stop(&sp->pap_my_to_ch);
1104 mtx_destroy(&sp->pp_cpq.ifq_mtx);
1105 mtx_destroy(&sp->pp_fastq.ifq_mtx);
1106 mtx_destroy(&sp->mtx);
1110 * Flush the interface output queue.
1113 sppp_flush_unlocked(struct ifnet *ifp)
1115 struct sppp *sp = IFP2SP(ifp);
1117 sppp_qflush ((struct ifqueue *)&SP2IFP(sp)->if_snd);
1118 sppp_qflush (&sp->pp_fastq);
1119 sppp_qflush (&sp->pp_cpq);
1123 sppp_flush(struct ifnet *ifp)
1125 struct sppp *sp = IFP2SP(ifp);
1128 sppp_flush_unlocked (ifp);
1133 * Check if the output queue is empty.
1136 sppp_isempty(struct ifnet *ifp)
1138 struct sppp *sp = IFP2SP(ifp);
1143 empty = !sp->pp_fastq.ifq_head && !sp->pp_cpq.ifq_head &&
1144 !SP2IFP(sp)->if_snd.ifq_head;
1151 * Get next packet to send.
1154 sppp_dequeue(struct ifnet *ifp)
1156 struct sppp *sp = IFP2SP(ifp);
1163 * Process only the control protocol queue until we have at
1164 * least one NCP open.
1166 * Do always serve all three queues in Cisco mode.
1168 IF_DEQUEUE(&sp->pp_cpq, m);
1170 (sppp_ncp_check(sp) || sp->pp_mode == IFF_CISCO ||
1171 sp->pp_mode == PP_FR)) {
1172 IF_DEQUEUE(&sp->pp_fastq, m);
1174 IF_DEQUEUE (&SP2IFP(sp)->if_snd, m);
1182 * Pick the next packet, do not remove it from the queue.
1185 sppp_pick(struct ifnet *ifp)
1187 struct sppp *sp = IFP2SP(ifp);
1194 m = sp->pp_cpq.ifq_head;
1196 (sp->pp_phase == PHASE_NETWORK ||
1197 sp->pp_mode == IFF_CISCO ||
1198 sp->pp_mode == PP_FR))
1199 if ((m = sp->pp_fastq.ifq_head) == NULL)
1200 m = SP2IFP(sp)->if_snd.ifq_head;
1207 * Process an ioctl request. Called on low priority level.
1210 sppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, void *data)
1212 struct ifreq *ifr = (struct ifreq*) data;
1213 struct sppp *sp = IFP2SP(ifp);
1214 int s, rv, going_up, going_down, newmode;
1221 case SIOCSIFDSTADDR:
1225 /* set the interface "up" when assigning an IP address */
1226 ifp->if_flags |= IFF_UP;
1230 going_up = ifp->if_flags & IFF_UP &&
1231 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0;
1232 going_down = (ifp->if_flags & IFF_UP) == 0 &&
1233 ifp->if_drv_flags & IFF_DRV_RUNNING;
1235 newmode = ifp->if_flags & IFF_PASSIVE;
1237 newmode = ifp->if_flags & IFF_AUTO;
1239 newmode = ifp->if_flags & IFF_CISCO;
1240 ifp->if_flags &= ~(IFF_PASSIVE | IFF_AUTO | IFF_CISCO);
1241 ifp->if_flags |= newmode;
1244 newmode = sp->pp_flags & PP_FR;
1246 if (newmode != sp->pp_mode) {
1249 going_up = ifp->if_drv_flags & IFF_DRV_RUNNING;
1253 if (sp->pp_mode != IFF_CISCO &&
1254 sp->pp_mode != PP_FR)
1256 else if (sp->pp_tlf)
1258 sppp_flush_unlocked(ifp);
1259 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1260 sp->pp_mode = newmode;
1264 if (sp->pp_mode != IFF_CISCO &&
1265 sp->pp_mode != PP_FR)
1267 sp->pp_mode = newmode;
1268 if (sp->pp_mode == 0) {
1269 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1272 if ((sp->pp_mode == IFF_CISCO) ||
1273 (sp->pp_mode == PP_FR)) {
1276 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1284 #define ifr_mtu ifr_metric
1287 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru)
1289 ifp->if_mtu = ifr->ifr_mtu;
1294 if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru)
1296 ifp->if_mtu = *(short*)data;
1301 ifr->ifr_mtu = ifp->if_mtu;
1306 *(short*)data = ifp->if_mtu;
1313 case SIOCGIFGENERIC:
1314 case SIOCSIFGENERIC:
1315 rv = sppp_params(sp, cmd, data);
1327 * Cisco framing implementation.
1331 * Handle incoming Cisco keepalive protocol packets.
1334 sppp_cisco_input(struct sppp *sp, struct mbuf *m)
1337 struct cisco_packet *h;
1340 if (m->m_pkthdr.len < CISCO_PACKET_LEN) {
1343 SPP_FMT "cisco invalid packet length: %d bytes\n",
1344 SPP_ARGS(ifp), m->m_pkthdr.len);
1347 h = mtod (m, struct cisco_packet*);
1350 SPP_FMT "cisco input: %d bytes "
1351 "<0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
1352 SPP_ARGS(ifp), m->m_pkthdr.len,
1353 (u_long)ntohl (h->type), (u_long)h->par1, (u_long)h->par2, (u_int)h->rel,
1354 (u_int)h->time0, (u_int)h->time1);
1355 switch (ntohl (h->type)) {
1358 log(-1, SPP_FMT "cisco unknown packet type: 0x%lx\n",
1359 SPP_ARGS(ifp), (u_long)ntohl (h->type));
1361 case CISCO_ADDR_REPLY:
1362 /* Reply on address request, ignore */
1364 case CISCO_KEEPALIVE_REQ:
1365 sp->pp_alivecnt = 0;
1366 sp->pp_rseq[IDX_LCP] = ntohl (h->par1);
1367 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) {
1368 /* Local and remote sequence numbers are equal.
1369 * Probably, the line is in loopback mode. */
1370 if (sp->pp_loopcnt >= MAXALIVECNT) {
1371 printf (SPP_FMT "loopback\n",
1374 if (ifp->if_flags & IFF_UP) {
1376 sppp_qflush (&sp->pp_cpq);
1381 /* Generate new local sequence number */
1382 sp->pp_seq[IDX_LCP] = random();
1386 if (! (ifp->if_flags & IFF_UP) &&
1387 (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1389 printf (SPP_FMT "up\n", SPP_ARGS(ifp));
1392 case CISCO_ADDR_REQ:
1393 sppp_get_ip_addrs(sp, &me, 0, &mymask);
1395 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask);
1401 * Send Cisco keepalive packet.
1404 sppp_cisco_send(struct sppp *sp, int type, long par1, long par2)
1407 struct ppp_header *h;
1408 struct cisco_packet *ch;
1412 getmicrouptime(&tv);
1414 MGETHDR (m, M_DONTWAIT, MT_DATA);
1417 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN;
1418 m->m_pkthdr.rcvif = 0;
1420 h = mtod (m, struct ppp_header*);
1421 h->address = CISCO_MULTICAST;
1423 h->protocol = htons (CISCO_KEEPALIVE);
1425 ch = (struct cisco_packet*) (h + 1);
1426 ch->type = htonl (type);
1427 ch->par1 = htonl (par1);
1428 ch->par2 = htonl (par2);
1431 ch->time0 = htons ((u_short) (tv.tv_sec >> 16));
1432 ch->time1 = htons ((u_short) tv.tv_sec);
1436 SPP_FMT "cisco output: <0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
1437 SPP_ARGS(ifp), (u_long)ntohl (ch->type), (u_long)ch->par1,
1438 (u_long)ch->par2, (u_int)ch->rel, (u_int)ch->time0, (u_int)ch->time1);
1440 if (! IF_HANDOFF_ADJ(&sp->pp_cpq, m, ifp, 3))
1445 * PPP protocol implementation.
1449 * Send PPP control protocol packet.
1452 sppp_cp_send(struct sppp *sp, u_short proto, u_char type,
1453 u_char ident, u_short len, void *data)
1456 struct ppp_header *h;
1457 struct lcp_header *lh;
1460 if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN)
1461 len = MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN;
1462 MGETHDR (m, M_DONTWAIT, MT_DATA);
1465 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
1466 m->m_pkthdr.rcvif = 0;
1468 h = mtod (m, struct ppp_header*);
1469 h->address = PPP_ALLSTATIONS; /* broadcast address */
1470 h->control = PPP_UI; /* Unnumbered Info */
1471 h->protocol = htons (proto); /* Link Control Protocol */
1473 lh = (struct lcp_header*) (h + 1);
1476 lh->len = htons (LCP_HEADER_LEN + len);
1478 bcopy (data, lh+1, len);
1481 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
1483 sppp_proto_name(proto),
1484 sppp_cp_type_name (lh->type), lh->ident,
1486 sppp_print_bytes ((u_char*) (lh+1), len);
1489 if (! IF_HANDOFF_ADJ(&sp->pp_cpq, m, ifp, 3))
1494 * Handle incoming PPP control protocol packets.
1497 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m)
1500 struct lcp_header *h;
1501 int len = m->m_pkthdr.len;
1508 SPP_FMT "%s invalid packet length: %d bytes\n",
1509 SPP_ARGS(ifp), cp->name, len);
1512 h = mtod (m, struct lcp_header*);
1515 SPP_FMT "%s input(%s): <%s id=0x%x len=%d",
1516 SPP_ARGS(ifp), cp->name,
1517 sppp_state_name(sp->state[cp->protoidx]),
1518 sppp_cp_type_name (h->type), h->ident, ntohs (h->len));
1519 sppp_print_bytes ((u_char*) (h+1), len-4);
1522 if (len > ntohs (h->len))
1523 len = ntohs (h->len);
1524 p = (u_char *)(h + 1);
1529 log(-1, SPP_FMT "%s invalid conf-req length %d\n",
1530 SPP_ARGS(ifp), cp->name,
1535 /* handle states where RCR doesn't get a SCA/SCN */
1536 switch (sp->state[cp->protoidx]) {
1538 case STATE_STOPPING:
1541 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident,
1545 rv = (cp->RCR)(sp, h, len);
1546 switch (sp->state[cp->protoidx]) {
1551 case STATE_ACK_SENT:
1552 case STATE_REQ_SENT:
1554 * sppp_cp_change_state() have the side effect of
1555 * restarting the timeouts. We want to avoid that
1556 * if the state don't change, otherwise we won't
1557 * ever timeout and resend a configuration request
1560 if (sp->state[cp->protoidx] == (rv ? STATE_ACK_SENT:
1563 sppp_cp_change_state(cp, sp, rv?
1564 STATE_ACK_SENT: STATE_REQ_SENT);
1567 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1569 sppp_cp_change_state(cp, sp, rv?
1570 STATE_ACK_SENT: STATE_REQ_SENT);
1572 case STATE_ACK_RCVD:
1574 sppp_cp_change_state(cp, sp, STATE_OPENED);
1576 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
1581 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1584 printf(SPP_FMT "%s illegal %s in state %s\n",
1585 SPP_ARGS(ifp), cp->name,
1586 sppp_cp_type_name(h->type),
1587 sppp_state_name(sp->state[cp->protoidx]));
1592 if (h->ident != sp->confid[cp->protoidx]) {
1594 log(-1, SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
1595 SPP_ARGS(ifp), cp->name,
1596 h->ident, sp->confid[cp->protoidx]);
1600 switch (sp->state[cp->protoidx]) {
1603 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1606 case STATE_STOPPING:
1608 case STATE_REQ_SENT:
1609 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1610 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1615 case STATE_ACK_RCVD:
1617 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1619 case STATE_ACK_SENT:
1620 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1621 sppp_cp_change_state(cp, sp, STATE_OPENED);
1623 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
1624 SPP_ARGS(ifp), cp->name);
1628 printf(SPP_FMT "%s illegal %s in state %s\n",
1629 SPP_ARGS(ifp), cp->name,
1630 sppp_cp_type_name(h->type),
1631 sppp_state_name(sp->state[cp->protoidx]));
1637 if (h->ident != sp->confid[cp->protoidx]) {
1639 log(-1, SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
1640 SPP_ARGS(ifp), cp->name,
1641 h->ident, sp->confid[cp->protoidx]);
1645 if (h->type == CONF_NAK)
1646 (cp->RCN_nak)(sp, h, len);
1648 (cp->RCN_rej)(sp, h, len);
1650 switch (sp->state[cp->protoidx]) {
1653 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1655 case STATE_REQ_SENT:
1656 case STATE_ACK_SENT:
1657 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1659 * Slow things down a bit if we think we might be
1660 * in loopback. Depend on the timeout to send the
1661 * next configuration request.
1670 case STATE_ACK_RCVD:
1671 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1675 case STATE_STOPPING:
1678 printf(SPP_FMT "%s illegal %s in state %s\n",
1679 SPP_ARGS(ifp), cp->name,
1680 sppp_cp_type_name(h->type),
1681 sppp_state_name(sp->state[cp->protoidx]));
1687 switch (sp->state[cp->protoidx]) {
1688 case STATE_ACK_RCVD:
1689 case STATE_ACK_SENT:
1690 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1695 case STATE_STOPPING:
1696 case STATE_REQ_SENT:
1698 /* Send Terminate-Ack packet. */
1700 log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n",
1701 SPP_ARGS(ifp), cp->name);
1702 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1706 sp->rst_counter[cp->protoidx] = 0;
1707 sppp_cp_change_state(cp, sp, STATE_STOPPING);
1711 printf(SPP_FMT "%s illegal %s in state %s\n",
1712 SPP_ARGS(ifp), cp->name,
1713 sppp_cp_type_name(h->type),
1714 sppp_state_name(sp->state[cp->protoidx]));
1719 switch (sp->state[cp->protoidx]) {
1722 case STATE_REQ_SENT:
1723 case STATE_ACK_SENT:
1726 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1729 case STATE_STOPPING:
1730 sppp_cp_change_state(cp, sp, STATE_STOPPED);
1733 case STATE_ACK_RCVD:
1734 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1739 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1742 printf(SPP_FMT "%s illegal %s in state %s\n",
1743 SPP_ARGS(ifp), cp->name,
1744 sppp_cp_type_name(h->type),
1745 sppp_state_name(sp->state[cp->protoidx]));
1750 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
1752 SPP_FMT "%s: ignoring RXJ (%s) for proto 0x%x, "
1753 "danger will robinson\n",
1754 SPP_ARGS(ifp), cp->name,
1755 sppp_cp_type_name(h->type), ntohs(*((u_short *)p)));
1756 switch (sp->state[cp->protoidx]) {
1759 case STATE_REQ_SENT:
1760 case STATE_ACK_SENT:
1762 case STATE_STOPPING:
1765 case STATE_ACK_RCVD:
1766 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1769 printf(SPP_FMT "%s illegal %s in state %s\n",
1770 SPP_ARGS(ifp), cp->name,
1771 sppp_cp_type_name(h->type),
1772 sppp_state_name(sp->state[cp->protoidx]));
1779 const struct cp *upper;
1785 proto = ntohs(*((u_int16_t *)p));
1786 for (i = 0; i < IDX_COUNT; i++) {
1787 if (cps[i]->proto == proto) {
1795 if (catastrophic || debug)
1796 log(catastrophic? LOG_INFO: LOG_DEBUG,
1797 SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n",
1798 SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+',
1799 sppp_cp_type_name(h->type), proto,
1800 upper ? upper->name : "unknown",
1801 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?");
1804 * if we got RXJ+ against conf-req, the peer does not implement
1805 * this particular protocol type. terminate the protocol.
1807 if (upper && !catastrophic) {
1808 if (sp->state[upper->protoidx] == STATE_REQ_SENT) {
1814 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
1815 switch (sp->state[cp->protoidx]) {
1818 case STATE_REQ_SENT:
1819 case STATE_ACK_SENT:
1821 case STATE_STOPPING:
1824 case STATE_ACK_RCVD:
1825 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1828 printf(SPP_FMT "%s illegal %s in state %s\n",
1829 SPP_ARGS(ifp), cp->name,
1830 sppp_cp_type_name(h->type),
1831 sppp_state_name(sp->state[cp->protoidx]));
1837 if (cp->proto != PPP_LCP)
1839 /* Discard the packet. */
1842 if (cp->proto != PPP_LCP)
1844 if (sp->state[cp->protoidx] != STATE_OPENED) {
1846 log(-1, SPP_FMT "lcp echo req but lcp closed\n",
1853 log(-1, SPP_FMT "invalid lcp echo request "
1854 "packet length: %d bytes\n",
1855 SPP_ARGS(ifp), len);
1858 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) &&
1859 ntohl (*(long*)(h+1)) == sp->lcp.magic) {
1860 /* Line loopback mode detected. */
1861 printf(SPP_FMT "loopback\n", SPP_ARGS(ifp));
1862 sp->pp_loopcnt = MAXALIVECNT * 5;
1864 sppp_qflush (&sp->pp_cpq);
1866 /* Shut down the PPP link. */
1872 *(long*)(h+1) = htonl (sp->lcp.magic);
1874 log(-1, SPP_FMT "got lcp echo req, sending echo rep\n",
1876 sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1);
1879 if (cp->proto != PPP_LCP)
1881 if (h->ident != sp->lcp.echoid) {
1887 log(-1, SPP_FMT "lcp invalid echo reply "
1888 "packet length: %d bytes\n",
1889 SPP_ARGS(ifp), len);
1893 log(-1, SPP_FMT "lcp got echo rep\n",
1895 if (!(sp->lcp.opts & (1 << LCP_OPT_MAGIC)) ||
1896 ntohl (*(long*)(h+1)) != sp->lcp.magic)
1897 sp->pp_alivecnt = 0;
1900 /* Unknown packet type -- send Code-Reject packet. */
1903 log(-1, SPP_FMT "%s send code-rej for 0x%x\n",
1904 SPP_ARGS(ifp), cp->name, h->type);
1905 sppp_cp_send(sp, cp->proto, CODE_REJ,
1906 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h);
1913 * The generic part of all Up/Down/Open/Close/TO event handlers.
1914 * Basically, the state transition handling in the automaton.
1917 sppp_up_event(const struct cp *cp, struct sppp *sp)
1922 log(LOG_DEBUG, SPP_FMT "%s up(%s)\n",
1923 SPP_ARGS(ifp), cp->name,
1924 sppp_state_name(sp->state[cp->protoidx]));
1926 switch (sp->state[cp->protoidx]) {
1928 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1930 case STATE_STARTING:
1931 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1933 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1936 printf(SPP_FMT "%s illegal up in state %s\n",
1937 SPP_ARGS(ifp), cp->name,
1938 sppp_state_name(sp->state[cp->protoidx]));
1943 sppp_down_event(const struct cp *cp, struct sppp *sp)
1948 log(LOG_DEBUG, SPP_FMT "%s down(%s)\n",
1949 SPP_ARGS(ifp), cp->name,
1950 sppp_state_name(sp->state[cp->protoidx]));
1952 switch (sp->state[cp->protoidx]) {
1955 sppp_cp_change_state(cp, sp, STATE_INITIAL);
1958 sppp_cp_change_state(cp, sp, STATE_STARTING);
1961 case STATE_STOPPING:
1962 case STATE_REQ_SENT:
1963 case STATE_ACK_RCVD:
1964 case STATE_ACK_SENT:
1965 sppp_cp_change_state(cp, sp, STATE_STARTING);
1969 sppp_cp_change_state(cp, sp, STATE_STARTING);
1972 printf(SPP_FMT "%s illegal down in state %s\n",
1973 SPP_ARGS(ifp), cp->name,
1974 sppp_state_name(sp->state[cp->protoidx]));
1980 sppp_open_event(const struct cp *cp, struct sppp *sp)
1985 log(LOG_DEBUG, SPP_FMT "%s open(%s)\n",
1986 SPP_ARGS(ifp), cp->name,
1987 sppp_state_name(sp->state[cp->protoidx]));
1989 switch (sp->state[cp->protoidx]) {
1991 sppp_cp_change_state(cp, sp, STATE_STARTING);
1994 case STATE_STARTING:
1997 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1999 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
2003 * Try escaping stopped state. This seems to bite
2004 * people occasionally, in particular for IPCP,
2005 * presumably following previous IPCP negotiation
2006 * aborts. Somehow, we must have missed a Down event
2007 * which would have caused a transition into starting
2008 * state, so as a bandaid we force the Down event now.
2009 * This effectively implements (something like the)
2010 * `restart' option mentioned in the state transition
2011 * table of RFC 1661.
2013 sppp_cp_change_state(cp, sp, STATE_STARTING);
2016 case STATE_STOPPING:
2017 case STATE_REQ_SENT:
2018 case STATE_ACK_RCVD:
2019 case STATE_ACK_SENT:
2023 sppp_cp_change_state(cp, sp, STATE_STOPPING);
2030 sppp_close_event(const struct cp *cp, struct sppp *sp)
2035 log(LOG_DEBUG, SPP_FMT "%s close(%s)\n",
2036 SPP_ARGS(ifp), cp->name,
2037 sppp_state_name(sp->state[cp->protoidx]));
2039 switch (sp->state[cp->protoidx]) {
2044 case STATE_STARTING:
2045 sppp_cp_change_state(cp, sp, STATE_INITIAL);
2049 sppp_cp_change_state(cp, sp, STATE_CLOSED);
2051 case STATE_STOPPING:
2052 sppp_cp_change_state(cp, sp, STATE_CLOSING);
2057 case STATE_REQ_SENT:
2058 case STATE_ACK_RCVD:
2059 case STATE_ACK_SENT:
2060 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate;
2061 sppp_cp_send(sp, cp->proto, TERM_REQ,
2062 ++sp->pp_seq[cp->protoidx], 0, 0);
2063 sppp_cp_change_state(cp, sp, STATE_CLOSING);
2069 sppp_to_event(const struct cp *cp, struct sppp *sp)
2077 log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n",
2078 SPP_ARGS(ifp), cp->name,
2079 sppp_state_name(sp->state[cp->protoidx]),
2080 sp->rst_counter[cp->protoidx]);
2082 if (--sp->rst_counter[cp->protoidx] < 0)
2084 switch (sp->state[cp->protoidx]) {
2086 sppp_cp_change_state(cp, sp, STATE_CLOSED);
2089 case STATE_STOPPING:
2090 sppp_cp_change_state(cp, sp, STATE_STOPPED);
2093 case STATE_REQ_SENT:
2094 case STATE_ACK_RCVD:
2095 case STATE_ACK_SENT:
2096 sppp_cp_change_state(cp, sp, STATE_STOPPED);
2102 switch (sp->state[cp->protoidx]) {
2104 case STATE_STOPPING:
2105 sppp_cp_send(sp, cp->proto, TERM_REQ,
2106 ++sp->pp_seq[cp->protoidx], 0, 0);
2107 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout,
2108 cp->TO, (void *)sp);
2110 case STATE_REQ_SENT:
2111 case STATE_ACK_RCVD:
2113 /* sppp_cp_change_state() will restart the timer */
2114 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
2116 case STATE_ACK_SENT:
2118 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout,
2119 cp->TO, (void *)sp);
2128 * Change the state of a control protocol in the state automaton.
2129 * Takes care of starting/stopping the restart timer.
2132 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate)
2134 sp->state[cp->protoidx] = newstate;
2136 callout_stop (&sp->ch[cp->protoidx]);
2140 case STATE_STARTING:
2146 case STATE_STOPPING:
2147 case STATE_REQ_SENT:
2148 case STATE_ACK_RCVD:
2149 case STATE_ACK_SENT:
2150 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout,
2151 cp->TO, (void *)sp);
2157 *--------------------------------------------------------------------------*
2159 * The LCP implementation. *
2161 *--------------------------------------------------------------------------*
2164 sppp_pp_up(struct sppp *sp)
2172 sppp_pp_down(struct sppp *sp)
2180 sppp_lcp_init(struct sppp *sp)
2182 sp->lcp.opts = (1 << LCP_OPT_MAGIC);
2184 sp->state[IDX_LCP] = STATE_INITIAL;
2185 sp->fail_counter[IDX_LCP] = 0;
2186 sp->pp_seq[IDX_LCP] = 0;
2187 sp->pp_rseq[IDX_LCP] = 0;
2189 sp->lcp.mru = sp->lcp.their_mru = PP_MTU;
2191 /* Note that these values are relevant for all control protocols */
2192 sp->lcp.timeout = 3 * hz;
2193 sp->lcp.max_terminate = 2;
2194 sp->lcp.max_configure = 10;
2195 sp->lcp.max_failure = 10;
2196 callout_init(&sp->ch[IDX_LCP], CALLOUT_MPSAFE);
2200 sppp_lcp_up(struct sppp *sp)
2204 sp->pp_alivecnt = 0;
2205 sp->lcp.opts = (1 << LCP_OPT_MAGIC);
2208 sp->lcp.mru = sp->lcp.their_mru = PP_MTU;
2210 * If we are authenticator, negotiate LCP_AUTH
2212 if (sp->hisauth.proto != 0)
2213 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO);
2215 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
2216 sp->pp_flags &= ~PP_NEEDAUTH;
2218 * If this interface is passive or dial-on-demand, and we are
2219 * still in Initial state, it means we've got an incoming
2220 * call. Activate the interface.
2222 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) {
2225 SPP_FMT "Up event", SPP_ARGS(ifp));
2226 ifp->if_drv_flags |= IFF_DRV_RUNNING;
2227 if (sp->state[IDX_LCP] == STATE_INITIAL) {
2229 log(-1, "(incoming call)\n");
2230 sp->pp_flags |= PP_CALLIN;
2234 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 &&
2235 (sp->state[IDX_LCP] == STATE_INITIAL)) {
2236 ifp->if_drv_flags |= IFF_DRV_RUNNING;
2240 sppp_up_event(&lcp, sp);
2244 sppp_lcp_down(struct sppp *sp)
2248 sppp_down_event(&lcp, sp);
2251 * If this is neither a dial-on-demand nor a passive
2252 * interface, simulate an ``ifconfig down'' action, so the
2253 * administrator can force a redial by another ``ifconfig
2254 * up''. XXX For leased line operation, should we immediately
2255 * try to reopen the connection here?
2257 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) {
2259 SPP_FMT "Down event, taking interface down.\n",
2265 SPP_FMT "Down event (carrier loss)\n",
2267 sp->pp_flags &= ~PP_CALLIN;
2268 if (sp->state[IDX_LCP] != STATE_INITIAL)
2270 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
2275 sppp_lcp_open(struct sppp *sp)
2277 sppp_open_event(&lcp, sp);
2281 sppp_lcp_close(struct sppp *sp)
2283 sppp_close_event(&lcp, sp);
2287 sppp_lcp_TO(void *cookie)
2289 sppp_to_event(&lcp, (struct sppp *)cookie);
2293 * Analyze a configure request. Return true if it was agreeable, and
2294 * caused action sca, false if it has been rejected or nak'ed, and
2295 * caused action scn. (The return value is used to make the state
2296 * transition decision in the state automaton.)
2299 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
2302 u_char *buf, *r, *p;
2309 buf = r = malloc (len, M_TEMP, M_NOWAIT);
2314 log(LOG_DEBUG, SPP_FMT "lcp parse opts: ",
2317 /* pass 1: check for things that need to be rejected */
2319 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
2320 len-=p[1], p+=p[1]) {
2322 log(-1, " %s ", sppp_lcp_opt_name(*p));
2326 if (len >= 6 && p[1] == 6)
2329 log(-1, "[invalid] ");
2331 case LCP_OPT_ASYNC_MAP:
2332 /* Async control character map. */
2333 if (len >= 6 && p[1] == 6)
2336 log(-1, "[invalid] ");
2339 /* Maximum receive unit. */
2340 if (len >= 4 && p[1] == 4)
2343 log(-1, "[invalid] ");
2345 case LCP_OPT_AUTH_PROTO:
2348 log(-1, "[invalid] ");
2351 authproto = (p[2] << 8) + p[3];
2352 if (authproto == PPP_CHAP && p[1] != 5) {
2354 log(-1, "[invalid chap len] ");
2357 if (sp->myauth.proto == 0) {
2358 /* we are not configured to do auth */
2360 log(-1, "[not configured] ");
2364 * Remote want us to authenticate, remember this,
2365 * so we stay in PHASE_AUTHENTICATE after LCP got
2368 sp->pp_flags |= PP_NEEDAUTH;
2371 /* Others not supported. */
2376 /* Add the option to rejected list. */
2383 log(-1, " send conf-rej\n");
2384 sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
2390 * pass 2: check for option values that are unacceptable and
2391 * thus require to be nak'ed.
2394 log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ",
2399 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
2400 len-=p[1], p+=p[1]) {
2402 log(-1, " %s ", sppp_lcp_opt_name(*p));
2405 /* Magic number -- extract. */
2406 nmagic = (u_long)p[2] << 24 |
2407 (u_long)p[3] << 16 | p[4] << 8 | p[5];
2408 if (nmagic != sp->lcp.magic) {
2411 log(-1, "0x%lx ", nmagic);
2414 if (debug && sp->pp_loopcnt < MAXALIVECNT*5)
2415 log(-1, "[glitch] ");
2418 * We negate our magic here, and NAK it. If
2419 * we see it later in an NAK packet, we
2420 * suggest a new one.
2422 nmagic = ~sp->lcp.magic;
2424 p[2] = nmagic >> 24;
2425 p[3] = nmagic >> 16;
2430 case LCP_OPT_ASYNC_MAP:
2432 * Async control character map -- just ignore it.
2434 * Quote from RFC 1662, chapter 6:
2435 * To enable this functionality, synchronous PPP
2436 * implementations MUST always respond to the
2437 * Async-Control-Character-Map Configuration
2438 * Option with the LCP Configure-Ack. However,
2439 * acceptance of the Configuration Option does
2440 * not imply that the synchronous implementation
2441 * will do any ACCM mapping. Instead, all such
2442 * octet mapping will be performed by the
2443 * asynchronous-to-synchronous converter.
2449 * Maximum receive unit. Always agreeable,
2450 * but ignored by now.
2452 sp->lcp.their_mru = p[2] * 256 + p[3];
2454 log(-1, "%lu ", sp->lcp.their_mru);
2457 case LCP_OPT_AUTH_PROTO:
2458 authproto = (p[2] << 8) + p[3];
2459 if (sp->myauth.proto != authproto) {
2460 /* not agreed, nak */
2462 log(-1, "[mine %s != his %s] ",
2463 sppp_proto_name(sp->hisauth.proto),
2464 sppp_proto_name(authproto));
2465 p[2] = sp->myauth.proto >> 8;
2466 p[3] = sp->myauth.proto;
2469 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) {
2471 log(-1, "[chap not MD5] ");
2477 /* Add the option to nak'ed list. */
2484 * Local and remote magics equal -- loopback?
2486 if (sp->pp_loopcnt >= MAXALIVECNT*5) {
2487 if (sp->pp_loopcnt == MAXALIVECNT*5)
2488 printf (SPP_FMT "loopback\n",
2490 if (ifp->if_flags & IFF_UP) {
2492 sppp_qflush(&sp->pp_cpq);
2497 } else if (!sp->pp_loopcnt &&
2498 ++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) {
2500 log(-1, " max_failure (%d) exceeded, "
2502 sp->lcp.max_failure);
2503 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
2506 log(-1, " send conf-nak\n");
2507 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf);
2511 log(-1, " send conf-ack\n");
2512 sp->fail_counter[IDX_LCP] = 0;
2514 sppp_cp_send (sp, PPP_LCP, CONF_ACK,
2515 h->ident, origlen, h+1);
2523 * Analyze the LCP Configure-Reject option list, and adjust our
2527 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
2533 buf = malloc (len, M_TEMP, M_NOWAIT);
2538 log(LOG_DEBUG, SPP_FMT "lcp rej opts: ",
2542 for (; len >= 2 && p[1] >= 2 && len >= p[1];
2543 len -= p[1], p += p[1]) {
2545 log(-1, " %s ", sppp_lcp_opt_name(*p));
2548 /* Magic number -- can't use it, use 0 */
2549 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC);
2554 * Should not be rejected anyway, since we only
2555 * negotiate a MRU if explicitly requested by
2558 sp->lcp.opts &= ~(1 << LCP_OPT_MRU);
2560 case LCP_OPT_AUTH_PROTO:
2562 * Peer doesn't want to authenticate himself,
2563 * deny unless this is a dialout call, and
2564 * AUTHFLAG_NOCALLOUT is set.
2566 if ((sp->pp_flags & PP_CALLIN) == 0 &&
2567 (sp->hisauth.flags & AUTHFLAG_NOCALLOUT) != 0) {
2569 log(-1, "[don't insist on auth "
2571 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
2575 log(-1, "[access denied]\n");
2587 * Analyze the LCP Configure-NAK option list, and adjust our
2591 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
2598 buf = malloc (len, M_TEMP, M_NOWAIT);
2603 log(LOG_DEBUG, SPP_FMT "lcp nak opts: ",
2607 for (; len >= 2 && p[1] >= 2 && len >= p[1];
2608 len -= p[1], p += p[1]) {
2610 log(-1, " %s ", sppp_lcp_opt_name(*p));
2613 /* Magic number -- renegotiate */
2614 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) &&
2615 len >= 6 && p[1] == 6) {
2616 magic = (u_long)p[2] << 24 |
2617 (u_long)p[3] << 16 | p[4] << 8 | p[5];
2619 * If the remote magic is our negated one,
2620 * this looks like a loopback problem.
2621 * Suggest a new magic to make sure.
2623 if (magic == ~sp->lcp.magic) {
2625 log(-1, "magic glitch ");
2626 sp->lcp.magic = random();
2628 sp->lcp.magic = magic;
2630 log(-1, "%lu ", magic);
2636 * Peer wants to advise us to negotiate an MRU.
2637 * Agree on it if it's reasonable, or use
2638 * default otherwise.
2640 if (len >= 4 && p[1] == 4) {
2641 u_int mru = p[2] * 256 + p[3];
2643 log(-1, "%d ", mru);
2644 if (mru < PP_MTU || mru > PP_MAX_MRU)
2647 sp->lcp.opts |= (1 << LCP_OPT_MRU);
2650 case LCP_OPT_AUTH_PROTO:
2652 * Peer doesn't like our authentication method,
2656 log(-1, "[access denied]\n");
2668 sppp_lcp_tlu(struct sppp *sp)
2675 if (! (ifp->if_flags & IFF_UP) &&
2676 (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
2677 /* Coming out of loopback mode. */
2679 printf (SPP_FMT "up\n", SPP_ARGS(ifp));
2682 for (i = 0; i < IDX_COUNT; i++)
2683 if ((cps[i])->flags & CP_QUAL)
2686 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 ||
2687 (sp->pp_flags & PP_NEEDAUTH) != 0)
2688 sp->pp_phase = PHASE_AUTHENTICATE;
2690 sp->pp_phase = PHASE_NETWORK;
2693 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2694 sppp_phase_name(sp->pp_phase));
2697 * Open all authentication protocols. This is even required
2698 * if we already proceeded to network phase, since it might be
2699 * that remote wants us to authenticate, so we might have to
2700 * send a PAP request. Undesired authentication protocols
2701 * don't do anything when they get an Open event.
2703 for (i = 0; i < IDX_COUNT; i++)
2704 if ((cps[i])->flags & CP_AUTH)
2707 if (sp->pp_phase == PHASE_NETWORK) {
2708 /* Notify all NCPs. */
2709 for (i = 0; i < IDX_COUNT; i++)
2710 if (((cps[i])->flags & CP_NCP) &&
2713 * Hack to administratively disable IPv6 if
2714 * not desired. Perhaps we should have another
2715 * flag for this, but right now, we can make
2716 * all struct cp's read/only.
2718 (cps[i] != &ipv6cp ||
2719 (sp->confflags & CONF_ENABLE_IPV6)))
2723 /* Send Up events to all started protos. */
2724 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2725 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0)
2728 /* notify low-level driver of state change */
2730 sp->pp_chg(sp, (int)sp->pp_phase);
2732 if (sp->pp_phase == PHASE_NETWORK)
2733 /* if no NCP is starting, close down */
2734 sppp_lcp_check_and_close(sp);
2738 sppp_lcp_tld(struct sppp *sp)
2744 sp->pp_phase = PHASE_TERMINATE;
2747 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2748 sppp_phase_name(sp->pp_phase));
2751 * Take upper layers down. We send the Down event first and
2752 * the Close second to prevent the upper layers from sending
2753 * ``a flurry of terminate-request packets'', as the RFC
2756 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2757 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) {
2759 (cps[i])->Close(sp);
2764 sppp_lcp_tls(struct sppp *sp)
2768 sp->pp_phase = PHASE_ESTABLISH;
2771 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2772 sppp_phase_name(sp->pp_phase));
2774 /* Notify lower layer if desired. */
2782 sppp_lcp_tlf(struct sppp *sp)
2786 sp->pp_phase = PHASE_DEAD;
2788 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2789 sppp_phase_name(sp->pp_phase));
2791 /* Notify lower layer if desired. */
2799 sppp_lcp_scr(struct sppp *sp)
2801 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */];
2805 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) {
2806 if (! sp->lcp.magic)
2807 sp->lcp.magic = random();
2808 opt[i++] = LCP_OPT_MAGIC;
2810 opt[i++] = sp->lcp.magic >> 24;
2811 opt[i++] = sp->lcp.magic >> 16;
2812 opt[i++] = sp->lcp.magic >> 8;
2813 opt[i++] = sp->lcp.magic;
2816 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) {
2817 opt[i++] = LCP_OPT_MRU;
2819 opt[i++] = sp->lcp.mru >> 8;
2820 opt[i++] = sp->lcp.mru;
2823 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) {
2824 authproto = sp->hisauth.proto;
2825 opt[i++] = LCP_OPT_AUTH_PROTO;
2826 opt[i++] = authproto == PPP_CHAP? 5: 4;
2827 opt[i++] = authproto >> 8;
2828 opt[i++] = authproto;
2829 if (authproto == PPP_CHAP)
2830 opt[i++] = CHAP_MD5;
2833 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP];
2834 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt);
2838 * Check the open NCPs, return true if at least one NCP is open.
2841 sppp_ncp_check(struct sppp *sp)
2845 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2846 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP)
2852 * Re-check the open NCPs and see if we should terminate the link.
2853 * Called by the NCPs during their tlf action handling.
2856 sppp_lcp_check_and_close(struct sppp *sp)
2859 if (sp->pp_phase < PHASE_NETWORK)
2860 /* don't bother, we are already going down */
2863 if (sppp_ncp_check(sp))
2870 *--------------------------------------------------------------------------*
2872 * The IPCP implementation. *
2874 *--------------------------------------------------------------------------*
2879 sppp_ipcp_init(struct sppp *sp)
2883 sp->state[IDX_IPCP] = STATE_INITIAL;
2884 sp->fail_counter[IDX_IPCP] = 0;
2885 sp->pp_seq[IDX_IPCP] = 0;
2886 sp->pp_rseq[IDX_IPCP] = 0;
2887 callout_init(&sp->ch[IDX_IPCP], CALLOUT_MPSAFE);
2891 sppp_ipcp_up(struct sppp *sp)
2893 sppp_up_event(&ipcp, sp);
2897 sppp_ipcp_down(struct sppp *sp)
2899 sppp_down_event(&ipcp, sp);
2903 sppp_ipcp_open(struct sppp *sp)
2906 u_long myaddr, hisaddr;
2908 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN | IPCP_MYADDR_SEEN |
2909 IPCP_MYADDR_DYN | IPCP_VJ);
2912 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0);
2914 * If we don't have his address, this probably means our
2915 * interface doesn't want to talk IP at all. (This could
2916 * be the case if somebody wants to speak only IPX, for
2917 * example.) Don't open IPCP in this case.
2919 if (hisaddr == 0L) {
2920 /* XXX this message should go away */
2922 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n",
2928 * I don't have an assigned address, so i need to
2929 * negotiate my address.
2931 sp->ipcp.flags |= IPCP_MYADDR_DYN;
2932 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
2934 sp->ipcp.flags |= IPCP_MYADDR_SEEN;
2935 if (sp->confflags & CONF_ENABLE_VJ) {
2936 sp->ipcp.opts |= (1 << IPCP_OPT_COMPRESSION);
2937 sp->ipcp.max_state = MAX_STATES - 1;
2938 sp->ipcp.compress_cid = 1;
2940 sppp_open_event(&ipcp, sp);
2944 sppp_ipcp_close(struct sppp *sp)
2946 sppp_close_event(&ipcp, sp);
2947 if (sp->ipcp.flags & IPCP_MYADDR_DYN)
2949 * My address was dynamic, clear it again.
2951 sppp_set_ip_addr(sp, 0L);
2955 sppp_ipcp_TO(void *cookie)
2957 sppp_to_event(&ipcp, (struct sppp *)cookie);
2961 * Analyze a configure request. Return true if it was agreeable, and
2962 * caused action sca, false if it has been rejected or nak'ed, and
2963 * caused action scn. (The return value is used to make the state
2964 * transition decision in the state automaton.)
2967 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
2969 u_char *buf, *r, *p;
2970 struct ifnet *ifp = SP2IFP(sp);
2971 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
2972 u_long hisaddr, desiredaddr;
2979 * Make sure to allocate a buf that can at least hold a
2980 * conf-nak with an `address' option. We might need it below.
2982 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT);
2986 /* pass 1: see if we can recognize them */
2988 log(LOG_DEBUG, SPP_FMT "ipcp parse opts: ",
2991 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
2992 len-=p[1], p+=p[1]) {
2994 log(-1, " %s ", sppp_ipcp_opt_name(*p));
2996 case IPCP_OPT_COMPRESSION:
2997 if (!(sp->confflags & CONF_ENABLE_VJ)) {
2998 /* VJ compression administratively disabled */
3000 log(-1, "[locally disabled] ");
3004 * In theory, we should only conf-rej an
3005 * option that is shorter than RFC 1618
3006 * requires (i.e. < 4), and should conf-nak
3007 * anything else that is not VJ. However,
3008 * since our algorithm always uses the
3009 * original option to NAK it with new values,
3010 * things would become more complicated. In
3011 * pratice, the only commonly implemented IP
3012 * compression option is VJ anyway, so the
3013 * difference is negligible.
3015 if (len >= 6 && p[1] == 6) {
3017 * correctly formed compression option
3018 * that could be VJ compression
3024 "optlen %d [invalid/unsupported] ",
3027 case IPCP_OPT_ADDRESS:
3028 if (len >= 6 && p[1] == 6) {
3029 /* correctly formed address option */
3033 log(-1, "[invalid] ");
3036 /* Others not supported. */
3041 /* Add the option to rejected list. */
3048 log(-1, " send conf-rej\n");
3049 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf);
3054 /* pass 2: parse option values */
3055 sppp_get_ip_addrs(sp, 0, &hisaddr, 0);
3057 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ",
3061 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
3062 len-=p[1], p+=p[1]) {
3064 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3066 case IPCP_OPT_COMPRESSION:
3067 desiredcomp = p[2] << 8 | p[3];
3068 /* We only support VJ */
3069 if (desiredcomp == IPCP_COMP_VJ) {
3071 log(-1, "VJ [ack] ");
3072 sp->ipcp.flags |= IPCP_VJ;
3073 sl_compress_init(sp->pp_comp, p[4]);
3074 sp->ipcp.max_state = p[4];
3075 sp->ipcp.compress_cid = p[5];
3080 "compproto %#04x [not supported] ",
3082 p[2] = IPCP_COMP_VJ >> 8;
3083 p[3] = IPCP_COMP_VJ;
3084 p[4] = sp->ipcp.max_state;
3085 p[5] = sp->ipcp.compress_cid;
3087 case IPCP_OPT_ADDRESS:
3088 /* This is the address he wants in his end */
3089 desiredaddr = p[2] << 24 | p[3] << 16 |
3091 if (desiredaddr == hisaddr ||
3092 (hisaddr >= 1 && hisaddr <= 254 && desiredaddr != 0)) {
3094 * Peer's address is same as our value,
3095 * or we have set it to 0.0.0.* to
3096 * indicate that we do not really care,
3097 * this is agreeable. Gonna conf-ack
3101 log(-1, "%s [ack] ",
3102 sppp_dotted_quad(hisaddr));
3103 /* record that we've seen it already */
3104 sp->ipcp.flags |= IPCP_HISADDR_SEEN;
3108 * The address wasn't agreeable. This is either
3109 * he sent us 0.0.0.0, asking to assign him an
3110 * address, or he send us another address not
3111 * matching our value. Either case, we gonna
3112 * conf-nak it with our value.
3113 * XXX: we should "rej" if hisaddr == 0
3116 if (desiredaddr == 0)
3117 log(-1, "[addr requested] ");
3119 log(-1, "%s [not agreed] ",
3120 sppp_dotted_quad(desiredaddr));
3123 p[2] = hisaddr >> 24;
3124 p[3] = hisaddr >> 16;
3125 p[4] = hisaddr >> 8;
3129 /* Add the option to nak'ed list. */
3136 * If we are about to conf-ack the request, but haven't seen
3137 * his address so far, gonna conf-nak it instead, with the
3138 * `address' option present and our idea of his address being
3139 * filled in there, to request negotiation of both addresses.
3141 * XXX This can result in an endless req - nak loop if peer
3142 * doesn't want to send us his address. Q: What should we do
3143 * about it? XXX A: implement the max-failure counter.
3145 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN) && !gotmyaddr) {
3146 buf[0] = IPCP_OPT_ADDRESS;
3148 buf[2] = hisaddr >> 24;
3149 buf[3] = hisaddr >> 16;
3150 buf[4] = hisaddr >> 8;
3154 log(-1, "still need hisaddr ");
3159 log(-1, " send conf-nak\n");
3160 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf);
3163 log(-1, " send conf-ack\n");
3164 sppp_cp_send (sp, PPP_IPCP, CONF_ACK,
3165 h->ident, origlen, h+1);
3173 * Analyze the IPCP Configure-Reject option list, and adjust our
3177 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3180 struct ifnet *ifp = SP2IFP(sp);
3181 int debug = ifp->if_flags & IFF_DEBUG;
3184 buf = malloc (len, M_TEMP, M_NOWAIT);
3189 log(LOG_DEBUG, SPP_FMT "ipcp rej opts: ",
3193 for (; len >= 2 && p[1] >= 2 && len >= p[1];
3194 len -= p[1], p += p[1]) {
3196 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3198 case IPCP_OPT_COMPRESSION:
3199 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESSION);
3201 case IPCP_OPT_ADDRESS:
3203 * Peer doesn't grok address option. This is
3204 * bad. XXX Should we better give up here?
3205 * XXX We could try old "addresses" option...
3207 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS);
3218 * Analyze the IPCP Configure-NAK option list, and adjust our
3222 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3225 struct ifnet *ifp = SP2IFP(sp);
3226 int debug = ifp->if_flags & IFF_DEBUG;
3231 buf = malloc (len, M_TEMP, M_NOWAIT);
3236 log(LOG_DEBUG, SPP_FMT "ipcp nak opts: ",
3240 for (; len >= 2 && p[1] >= 2 && len >= p[1];
3241 len -= p[1], p += p[1]) {
3243 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3245 case IPCP_OPT_COMPRESSION:
3246 if (len >= 6 && p[1] == 6) {
3247 desiredcomp = p[2] << 8 | p[3];
3249 log(-1, "[wantcomp %#04x] ",
3251 if (desiredcomp == IPCP_COMP_VJ) {
3252 sl_compress_init(sp->pp_comp, p[4]);
3253 sp->ipcp.max_state = p[4];
3254 sp->ipcp.compress_cid = p[5];
3256 log(-1, "[agree] ");
3259 ~(1 << IPCP_OPT_COMPRESSION);
3262 case IPCP_OPT_ADDRESS:
3264 * Peer doesn't like our local IP address. See
3265 * if we can do something for him. We'll drop
3266 * him our address then.
3268 if (len >= 6 && p[1] == 6) {
3269 wantaddr = p[2] << 24 | p[3] << 16 |
3271 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
3273 log(-1, "[wantaddr %s] ",
3274 sppp_dotted_quad(wantaddr));
3276 * When doing dynamic address assignment,
3277 * we accept his offer. Otherwise, we
3278 * ignore it and thus continue to negotiate
3279 * our already existing value.
3280 * XXX: Bogus, if he said no once, he'll
3281 * just say no again, might as well die.
3283 if (sp->ipcp.flags & IPCP_MYADDR_DYN) {
3284 sppp_set_ip_addr(sp, wantaddr);
3286 log(-1, "[agree] ");
3287 sp->ipcp.flags |= IPCP_MYADDR_SEEN;
3300 sppp_ipcp_tlu(struct sppp *sp)
3302 /* we are up - notify isdn daemon */
3308 sppp_ipcp_tld(struct sppp *sp)
3313 sppp_ipcp_tls(struct sppp *sp)
3315 /* indicate to LCP that it must stay alive */
3316 sp->lcp.protos |= (1 << IDX_IPCP);
3320 sppp_ipcp_tlf(struct sppp *sp)
3322 /* we no longer need LCP */
3323 sp->lcp.protos &= ~(1 << IDX_IPCP);
3324 sppp_lcp_check_and_close(sp);
3328 sppp_ipcp_scr(struct sppp *sp)
3330 char opt[6 /* compression */ + 6 /* address */];
3334 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) {
3335 opt[i++] = IPCP_OPT_COMPRESSION;
3337 opt[i++] = IPCP_COMP_VJ >> 8;
3338 opt[i++] = IPCP_COMP_VJ;
3339 opt[i++] = sp->ipcp.max_state;
3340 opt[i++] = sp->ipcp.compress_cid;
3342 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) {
3343 sppp_get_ip_addrs(sp, &ouraddr, 0, 0);
3344 opt[i++] = IPCP_OPT_ADDRESS;
3346 opt[i++] = ouraddr >> 24;
3347 opt[i++] = ouraddr >> 16;
3348 opt[i++] = ouraddr >> 8;
3352 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP];
3353 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt);
3357 sppp_ipcp_init(struct sppp *sp)
3362 sppp_ipcp_up(struct sppp *sp)
3367 sppp_ipcp_down(struct sppp *sp)
3372 sppp_ipcp_open(struct sppp *sp)
3377 sppp_ipcp_close(struct sppp *sp)
3382 sppp_ipcp_TO(void *cookie)
3387 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3393 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3398 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3403 sppp_ipcp_tlu(struct sppp *sp)
3408 sppp_ipcp_tld(struct sppp *sp)
3413 sppp_ipcp_tls(struct sppp *sp)
3418 sppp_ipcp_tlf(struct sppp *sp)
3423 sppp_ipcp_scr(struct sppp *sp)
3429 *--------------------------------------------------------------------------*
3431 * The IPv6CP implementation. *
3433 *--------------------------------------------------------------------------*
3438 sppp_ipv6cp_init(struct sppp *sp)
3440 sp->ipv6cp.opts = 0;
3441 sp->ipv6cp.flags = 0;
3442 sp->state[IDX_IPV6CP] = STATE_INITIAL;
3443 sp->fail_counter[IDX_IPV6CP] = 0;
3444 sp->pp_seq[IDX_IPV6CP] = 0;
3445 sp->pp_rseq[IDX_IPV6CP] = 0;
3446 callout_init(&sp->ch[IDX_IPV6CP], CALLOUT_MPSAFE);
3450 sppp_ipv6cp_up(struct sppp *sp)
3452 sppp_up_event(&ipv6cp, sp);
3456 sppp_ipv6cp_down(struct sppp *sp)
3458 sppp_down_event(&ipv6cp, sp);
3462 sppp_ipv6cp_open(struct sppp *sp)
3465 struct in6_addr myaddr, hisaddr;
3467 #ifdef IPV6CP_MYIFID_DYN
3468 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN);
3470 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN;
3473 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0);
3475 * If we don't have our address, this probably means our
3476 * interface doesn't want to talk IPv6 at all. (This could
3477 * be the case if somebody wants to speak only IPX, for
3478 * example.) Don't open IPv6CP in this case.
3480 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) {
3481 /* XXX this message should go away */
3483 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n",
3488 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN;
3489 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID);
3490 sppp_open_event(&ipv6cp, sp);
3494 sppp_ipv6cp_close(struct sppp *sp)
3496 sppp_close_event(&ipv6cp, sp);
3500 sppp_ipv6cp_TO(void *cookie)
3502 sppp_to_event(&ipv6cp, (struct sppp *)cookie);
3506 * Analyze a configure request. Return true if it was agreeable, and
3507 * caused action sca, false if it has been rejected or nak'ed, and
3508 * caused action scn. (The return value is used to make the state
3509 * transition decision in the state automaton.)
3512 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3514 u_char *buf, *r, *p;
3515 struct ifnet *ifp = SP2IFP(sp);
3516 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
3517 struct in6_addr myaddr, desiredaddr, suggestaddr;
3520 int collision, nohisaddr;
3521 char ip6buf[INET6_ADDRSTRLEN];
3526 * Make sure to allocate a buf that can at least hold a
3527 * conf-nak with an `address' option. We might need it below.
3529 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT);
3533 /* pass 1: see if we can recognize them */
3535 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:",
3539 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
3540 len-=p[1], p+=p[1]) {
3542 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3544 case IPV6CP_OPT_IFID:
3545 if (len >= 10 && p[1] == 10 && ifidcount == 0) {
3546 /* correctly formed address option */
3551 log(-1, " [invalid]");
3554 case IPV6CP_OPT_COMPRESSION:
3555 if (len >= 4 && p[1] >= 4) {
3556 /* correctly formed compress option */
3560 log(-1, " [invalid]");
3564 /* Others not supported. */
3569 /* Add the option to rejected list. */
3576 log(-1, " send conf-rej\n");
3577 sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf);
3582 /* pass 2: parse option values */
3583 sppp_get_ip6_addrs(sp, &myaddr, 0, 0);
3585 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ",
3590 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
3591 len-=p[1], p+=p[1]) {
3593 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3596 case IPV6CP_OPT_COMPRESSION:
3599 case IPV6CP_OPT_IFID:
3600 bzero(&desiredaddr, sizeof(desiredaddr));
3601 bcopy(&p[2], &desiredaddr.s6_addr[8], 8);
3602 collision = (bcmp(&desiredaddr.s6_addr[8],
3603 &myaddr.s6_addr[8], 8) == 0);
3604 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr);
3606 desiredaddr.s6_addr16[0] = htons(0xfe80);
3607 (void)in6_setscope(&desiredaddr, SP2IFP(sp), NULL);
3609 if (!collision && !nohisaddr) {
3610 /* no collision, hisaddr known - Conf-Ack */
3615 ip6_sprintf(ip6buf, &desiredaddr),
3616 sppp_cp_type_name(type));
3621 bzero(&suggestaddr, sizeof(&suggestaddr));
3622 if (collision && nohisaddr) {
3623 /* collision, hisaddr unknown - Conf-Rej */
3628 * - no collision, hisaddr unknown, or
3629 * - collision, hisaddr known
3630 * Conf-Nak, suggest hisaddr
3633 sppp_suggest_ip6_addr(sp, &suggestaddr);
3634 bcopy(&suggestaddr.s6_addr[8], &p[2], 8);
3638 ip6_sprintf(ip6buf, &desiredaddr),
3639 sppp_cp_type_name(type));
3642 /* Add the option to nak'ed list. */
3648 if (rlen == 0 && type == CONF_ACK) {
3650 log(-1, " send %s\n", sppp_cp_type_name(type));
3651 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1);
3654 if (type == CONF_ACK)
3655 panic("IPv6CP RCR: CONF_ACK with non-zero rlen");
3659 log(-1, " send %s suggest %s\n",
3660 sppp_cp_type_name(type),
3661 ip6_sprintf(ip6buf, &suggestaddr));
3663 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf);
3672 * Analyze the IPv6CP Configure-Reject option list, and adjust our
3676 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3679 struct ifnet *ifp = SP2IFP(sp);
3680 int debug = ifp->if_flags & IFF_DEBUG;
3683 buf = malloc (len, M_TEMP, M_NOWAIT);
3688 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:",
3692 for (; len >= 2 && p[1] >= 2 && len >= p[1];
3693 len -= p[1], p += p[1]) {
3695 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3697 case IPV6CP_OPT_IFID:
3699 * Peer doesn't grok address option. This is
3700 * bad. XXX Should we better give up here?
3702 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID);
3705 case IPV6CP_OPT_COMPRESS:
3706 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS);
3718 * Analyze the IPv6CP Configure-NAK option list, and adjust our
3722 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3725 struct ifnet *ifp = SP2IFP(sp);
3726 int debug = ifp->if_flags & IFF_DEBUG;
3727 struct in6_addr suggestaddr;
3728 char ip6buf[INET6_ADDRSTRLEN];
3731 buf = malloc (len, M_TEMP, M_NOWAIT);
3736 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:",
3740 for (; len >= 2 && p[1] >= 2 && len >= p[1];
3741 len -= p[1], p += p[1]) {
3743 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3745 case IPV6CP_OPT_IFID:
3747 * Peer doesn't like our local ifid. See
3748 * if we can do something for him. We'll drop
3749 * him our address then.
3751 if (len < 10 || p[1] != 10)
3753 bzero(&suggestaddr, sizeof(suggestaddr));
3754 suggestaddr.s6_addr16[0] = htons(0xfe80);
3755 (void)in6_setscope(&suggestaddr, SP2IFP(sp), NULL);
3756 bcopy(&p[2], &suggestaddr.s6_addr[8], 8);
3758 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID);
3760 log(-1, " [suggestaddr %s]",
3761 ip6_sprintf(ip6buf, &suggestaddr));
3762 #ifdef IPV6CP_MYIFID_DYN
3764 * When doing dynamic address assignment,
3765 * we accept his offer.
3767 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) {
3768 struct in6_addr lastsuggest;
3770 * If <suggested myaddr from peer> equals to
3771 * <hisaddr we have suggested last time>,
3772 * we have a collision. generate new random
3775 sppp_suggest_ip6_addr(&lastsuggest);
3776 if (IN6_ARE_ADDR_EQUAL(&suggestaddr,
3779 log(-1, " [random]");
3780 sppp_gen_ip6_addr(sp, &suggestaddr);
3782 sppp_set_ip6_addr(sp, &suggestaddr, 0);
3784 log(-1, " [agree]");
3785 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN;
3789 * Since we do not do dynamic address assignment,
3790 * we ignore it and thus continue to negotiate
3791 * our already existing value. This can possibly
3792 * go into infinite request-reject loop.
3794 * This is not likely because we normally use
3795 * ifid based on MAC-address.
3796 * If you have no ethernet card on the node, too bad.
3797 * XXX should we use fail_counter?
3802 case IPV6CP_OPT_COMPRESS:
3804 * Peer wants different compression parameters.
3816 sppp_ipv6cp_tlu(struct sppp *sp)
3818 /* we are up - notify isdn daemon */
3824 sppp_ipv6cp_tld(struct sppp *sp)
3829 sppp_ipv6cp_tls(struct sppp *sp)
3831 /* indicate to LCP that it must stay alive */
3832 sp->lcp.protos |= (1 << IDX_IPV6CP);
3836 sppp_ipv6cp_tlf(struct sppp *sp)
3839 #if 0 /* need #if 0 to close IPv6CP properly */
3840 /* we no longer need LCP */
3841 sp->lcp.protos &= ~(1 << IDX_IPV6CP);
3842 sppp_lcp_check_and_close(sp);
3847 sppp_ipv6cp_scr(struct sppp *sp)
3849 char opt[10 /* ifid */ + 4 /* compression, minimum */];
3850 struct in6_addr ouraddr;
3853 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) {
3854 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0);
3855 opt[i++] = IPV6CP_OPT_IFID;
3857 bcopy(&ouraddr.s6_addr[8], &opt[i], 8);
3862 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) {
3863 opt[i++] = IPV6CP_OPT_COMPRESSION;
3865 opt[i++] = 0; /* TBD */
3866 opt[i++] = 0; /* TBD */
3867 /* variable length data may follow */
3871 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP];
3872 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt);
3875 static void sppp_ipv6cp_init(struct sppp *sp)
3879 static void sppp_ipv6cp_up(struct sppp *sp)
3883 static void sppp_ipv6cp_down(struct sppp *sp)
3888 static void sppp_ipv6cp_open(struct sppp *sp)
3892 static void sppp_ipv6cp_close(struct sppp *sp)
3896 static void sppp_ipv6cp_TO(void *sp)
3900 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3905 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3909 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3913 static void sppp_ipv6cp_tlu(struct sppp *sp)
3917 static void sppp_ipv6cp_tld(struct sppp *sp)
3921 static void sppp_ipv6cp_tls(struct sppp *sp)
3925 static void sppp_ipv6cp_tlf(struct sppp *sp)
3929 static void sppp_ipv6cp_scr(struct sppp *sp)
3935 *--------------------------------------------------------------------------*
3937 * The CHAP implementation. *
3939 *--------------------------------------------------------------------------*
3943 * The authentication protocols don't employ a full-fledged state machine as
3944 * the control protocols do, since they do have Open and Close events, but
3945 * not Up and Down, nor are they explicitly terminated. Also, use of the
3946 * authentication protocols may be different in both directions (this makes
3947 * sense, think of a machine that never accepts incoming calls but only
3948 * calls out, it doesn't require the called party to authenticate itself).
3950 * Our state machine for the local authentication protocol (we are requesting
3951 * the peer to authenticate) looks like:
3954 * +--------------------------------------------+
3956 * +--------+ Close +---------+ RCA+
3957 * | |<----------------------------------| |------+
3958 * +--->| Closed | TO* | Opened | sca |
3959 * | | |-----+ +-------| |<-----+
3960 * | +--------+ irc | | +---------+
3966 * | | +------->+ | |
3968 * | +--------+ V | |
3969 * | | |<----+<--------------------+ |
3975 * +------+ +------------------------------------------+
3976 * scn,tld sca,irc,ict,tlu
3981 * Open: LCP reached authentication phase
3982 * Close: LCP reached terminate phase
3984 * RCA+: received reply (pap-req, chap-response), acceptable
3985 * RCN: received reply (pap-req, chap-response), not acceptable
3986 * TO+: timeout with restart counter >= 0
3987 * TO-: timeout with restart counter < 0
3988 * TO*: reschedule timeout for CHAP
3990 * scr: send request packet (none for PAP, chap-challenge)
3991 * sca: send ack packet (pap-ack, chap-success)
3992 * scn: send nak packet (pap-nak, chap-failure)
3993 * ict: initialize re-challenge timer (CHAP only)
3995 * tlu: this-layer-up, LCP reaches network phase
3996 * tld: this-layer-down, LCP enters terminate phase
3998 * Note that in CHAP mode, after sending a new challenge, while the state
3999 * automaton falls back into Req-Sent state, it doesn't signal a tld
4000 * event to LCP, so LCP remains in network phase. Only after not getting
4001 * any response (or after getting an unacceptable response), CHAP closes,
4002 * causing LCP to enter terminate phase.
4004 * With PAP, there is no initial request that can be sent. The peer is
4005 * expected to send one based on the successful negotiation of PAP as
4006 * the authentication protocol during the LCP option negotiation.
4008 * Incoming authentication protocol requests (remote requests
4009 * authentication, we are peer) don't employ a state machine at all,
4010 * they are simply answered. Some peers [Ascend P50 firmware rev
4011 * 4.50] react allergically when sending IPCP requests while they are
4012 * still in authentication phase (thereby violating the standard that
4013 * demands that these NCP packets are to be discarded), so we keep
4014 * track of the peer demanding us to authenticate, and only proceed to
4015 * phase network once we've seen a positive acknowledge for the
4020 * Handle incoming CHAP packets.
4023 sppp_chap_input(struct sppp *sp, struct mbuf *m)
4026 struct lcp_header *h;
4028 u_char *value, *name, digest[AUTHKEYLEN], dsize;
4029 int value_len, name_len;
4032 len = m->m_pkthdr.len;
4036 SPP_FMT "chap invalid packet length: %d bytes\n",
4037 SPP_ARGS(ifp), len);
4040 h = mtod (m, struct lcp_header*);
4041 if (len > ntohs (h->len))
4042 len = ntohs (h->len);
4045 /* challenge, failure and success are his authproto */
4046 case CHAP_CHALLENGE:
4047 value = 1 + (u_char*)(h+1);
4048 value_len = value[-1];
4049 name = value + value_len;
4050 name_len = len - value_len - 5;
4054 SPP_FMT "chap corrupted challenge "
4055 "<%s id=0x%x len=%d",
4057 sppp_auth_type_name(PPP_CHAP, h->type),
4058 h->ident, ntohs(h->len));
4059 sppp_print_bytes((u_char*) (h+1), len-4);
4067 SPP_FMT "chap input <%s id=0x%x len=%d name=",
4069 sppp_auth_type_name(PPP_CHAP, h->type), h->ident,
4071 sppp_print_string((char*) name, name_len);
4072 log(-1, " value-size=%d value=", value_len);
4073 sppp_print_bytes(value, value_len);
4077 /* Compute reply value. */
4079 MD5Update(&ctx, &h->ident, 1);
4080 MD5Update(&ctx, sp->myauth.secret,
4081 sppp_strnlen(sp->myauth.secret, AUTHKEYLEN));
4082 MD5Update(&ctx, value, value_len);
4083 MD5Final(digest, &ctx);
4084 dsize = sizeof digest;
4086 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident,
4087 sizeof dsize, (const char *)&dsize,
4088 sizeof digest, digest,
4089 (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
4096 log(LOG_DEBUG, SPP_FMT "chap success",
4100 sppp_print_string((char*)(h + 1), len - 4);
4106 sp->pp_flags &= ~PP_NEEDAUTH;
4107 if (sp->myauth.proto == PPP_CHAP &&
4108 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
4109 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) {
4111 * We are authenticator for CHAP but didn't
4112 * complete yet. Leave it to tlu to proceed
4121 sppp_phase_network(sp);
4126 log(LOG_INFO, SPP_FMT "chap failure",
4130 sppp_print_string((char*)(h + 1), len - 4);
4134 log(LOG_INFO, SPP_FMT "chap failure\n",
4136 /* await LCP shutdown by authenticator */
4139 /* response is my authproto */
4141 value = 1 + (u_char*)(h+1);
4142 value_len = value[-1];
4143 name = value + value_len;
4144 name_len = len - value_len - 5;
4148 SPP_FMT "chap corrupted response "
4149 "<%s id=0x%x len=%d",
4151 sppp_auth_type_name(PPP_CHAP, h->type),
4152 h->ident, ntohs(h->len));
4153 sppp_print_bytes((u_char*)(h+1), len-4);
4158 if (h->ident != sp->confid[IDX_CHAP]) {
4161 SPP_FMT "chap dropping response for old ID "
4162 "(got %d, expected %d)\n",
4164 h->ident, sp->confid[IDX_CHAP]);
4167 if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN)
4168 || bcmp(name, sp->hisauth.name, name_len) != 0) {
4169 log(LOG_INFO, SPP_FMT "chap response, his name ",
4171 sppp_print_string(name, name_len);
4172 log(-1, " != expected ");
4173 sppp_print_string(sp->hisauth.name,
4174 sppp_strnlen(sp->hisauth.name, AUTHNAMELEN));
4178 log(LOG_DEBUG, SPP_FMT "chap input(%s) "
4179 "<%s id=0x%x len=%d name=",
4181 sppp_state_name(sp->state[IDX_CHAP]),
4182 sppp_auth_type_name(PPP_CHAP, h->type),
4183 h->ident, ntohs (h->len));
4184 sppp_print_string((char*)name, name_len);
4185 log(-1, " value-size=%d value=", value_len);
4186 sppp_print_bytes(value, value_len);
4189 if (value_len != AUTHKEYLEN) {
4192 SPP_FMT "chap bad hash value length: "
4193 "%d bytes, should be %d\n",
4194 SPP_ARGS(ifp), value_len,
4200 MD5Update(&ctx, &h->ident, 1);
4201 MD5Update(&ctx, sp->hisauth.secret,
4202 sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN));
4203 MD5Update(&ctx, sp->myauth.challenge, AUTHKEYLEN);
4204 MD5Final(digest, &ctx);
4206 #define FAILMSG "Failed..."
4207 #define SUCCMSG "Welcome!"
4209 if (value_len != sizeof digest ||
4210 bcmp(digest, value, value_len) != 0) {
4211 /* action scn, tld */
4212 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident,
4213 sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
4218 /* action sca, perhaps tlu */
4219 if (sp->state[IDX_CHAP] == STATE_REQ_SENT ||
4220 sp->state[IDX_CHAP] == STATE_OPENED)
4221 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident,
4222 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
4224 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) {
4225 sppp_cp_change_state(&chap, sp, STATE_OPENED);
4231 /* Unknown CHAP packet type -- ignore. */
4233 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) "
4234 "<0x%x id=0x%xh len=%d",
4236 sppp_state_name(sp->state[IDX_CHAP]),
4237 h->type, h->ident, ntohs(h->len));
4238 sppp_print_bytes((u_char*)(h+1), len-4);
4247 sppp_chap_init(struct sppp *sp)
4249 /* Chap doesn't have STATE_INITIAL at all. */
4250 sp->state[IDX_CHAP] = STATE_CLOSED;
4251 sp->fail_counter[IDX_CHAP] = 0;
4252 sp->pp_seq[IDX_CHAP] = 0;
4253 sp->pp_rseq[IDX_CHAP] = 0;
4254 callout_init(&sp->ch[IDX_CHAP], CALLOUT_MPSAFE);
4258 sppp_chap_open(struct sppp *sp)
4260 if (sp->myauth.proto == PPP_CHAP &&
4261 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
4262 /* we are authenticator for CHAP, start it */
4264 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4265 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
4267 /* nothing to be done if we are peer, await a challenge */
4271 sppp_chap_close(struct sppp *sp)
4273 if (sp->state[IDX_CHAP] != STATE_CLOSED)
4274 sppp_cp_change_state(&chap, sp, STATE_CLOSED);
4278 sppp_chap_TO(void *cookie)
4280 struct sppp *sp = (struct sppp *)cookie;
4287 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n",
4289 sppp_state_name(sp->state[IDX_CHAP]),
4290 sp->rst_counter[IDX_CHAP]);
4292 if (--sp->rst_counter[IDX_CHAP] < 0)
4294 switch (sp->state[IDX_CHAP]) {
4295 case STATE_REQ_SENT:
4297 sppp_cp_change_state(&chap, sp, STATE_CLOSED);
4301 /* TO+ (or TO*) event */
4302 switch (sp->state[IDX_CHAP]) {
4305 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4307 case STATE_REQ_SENT:
4309 /* sppp_cp_change_state() will restart the timer */
4310 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
4319 sppp_chap_tlu(struct sppp *sp)
4325 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4328 * Some broken CHAP implementations (Conware CoNet, firmware
4329 * 4.0.?) don't want to re-authenticate their CHAP once the
4330 * initial challenge-response exchange has taken place.
4331 * Provide for an option to avoid rechallenges.
4333 if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0) {
4335 * Compute the re-challenge timeout. This will yield
4336 * a number between 300 and 810 seconds.
4338 i = 300 + ((unsigned)(random() & 0xff00) >> 7);
4339 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, (void *)sp);
4344 SPP_FMT "chap %s, ",
4346 sp->pp_phase == PHASE_NETWORK? "reconfirmed": "tlu");
4347 if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0)
4348 log(-1, "next re-challenge in %d seconds\n", i);
4350 log(-1, "re-challenging supressed\n");
4355 /* indicate to LCP that we need to be closed down */
4356 sp->lcp.protos |= (1 << IDX_CHAP);
4358 if (sp->pp_flags & PP_NEEDAUTH) {
4360 * Remote is authenticator, but his auth proto didn't
4361 * complete yet. Defer the transition to network
4372 * If we are already in phase network, we are done here. This
4373 * is the case if this is a dummy tlu event after a re-challenge.
4375 if (sp->pp_phase != PHASE_NETWORK)
4376 sppp_phase_network(sp);
4380 sppp_chap_tld(struct sppp *sp)
4385 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp));
4386 callout_stop(&sp->ch[IDX_CHAP]);
4387 sp->lcp.protos &= ~(1 << IDX_CHAP);
4393 sppp_chap_scr(struct sppp *sp)
4398 /* Compute random challenge. */
4399 ch = (u_long *)sp->myauth.challenge;
4400 read_random(&seed, sizeof seed);
4401 ch[0] = seed ^ random();
4402 ch[1] = seed ^ random();
4403 ch[2] = seed ^ random();
4404 ch[3] = seed ^ random();
4407 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP];
4409 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP],
4410 sizeof clen, (const char *)&clen,
4411 (size_t)AUTHKEYLEN, sp->myauth.challenge,
4412 (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
4418 *--------------------------------------------------------------------------*
4420 * The PAP implementation. *
4422 *--------------------------------------------------------------------------*
4425 * For PAP, we need to keep a little state also if we are the peer, not the
4426 * authenticator. This is since we don't get a request to authenticate, but
4427 * have to repeatedly authenticate ourself until we got a response (or the
4428 * retry counter is expired).
4432 * Handle incoming PAP packets. */
4434 sppp_pap_input(struct sppp *sp, struct mbuf *m)
4437 struct lcp_header *h;
4439 u_char *name, *passwd, mlen;
4440 int name_len, passwd_len;
4442 len = m->m_pkthdr.len;
4446 SPP_FMT "pap invalid packet length: %d bytes\n",
4447 SPP_ARGS(ifp), len);
4450 h = mtod (m, struct lcp_header*);
4451 if (len > ntohs (h->len))
4452 len = ntohs (h->len);
4454 /* PAP request is my authproto */
4456 name = 1 + (u_char*)(h+1);
4457 name_len = name[-1];
4458 passwd = name + name_len + 1;
4459 if (name_len > len - 6 ||
4460 (passwd_len = passwd[-1]) > len - 6 - name_len) {
4462 log(LOG_DEBUG, SPP_FMT "pap corrupted input "
4463 "<%s id=0x%x len=%d",
4465 sppp_auth_type_name(PPP_PAP, h->type),
4466 h->ident, ntohs(h->len));
4467 sppp_print_bytes((u_char*)(h+1), len-4);
4473 log(LOG_DEBUG, SPP_FMT "pap input(%s) "
4474 "<%s id=0x%x len=%d name=",
4476 sppp_state_name(sp->state[IDX_PAP]),
4477 sppp_auth_type_name(PPP_PAP, h->type),
4478 h->ident, ntohs(h->len));
4479 sppp_print_string((char*)name, name_len);
4480 log(-1, " passwd=");
4481 sppp_print_string((char*)passwd, passwd_len);
4484 if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN) ||
4485 passwd_len != sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN) ||
4486 bcmp(name, sp->hisauth.name, name_len) != 0 ||
4487 bcmp(passwd, sp->hisauth.secret, passwd_len) != 0) {
4488 /* action scn, tld */
4489 mlen = sizeof(FAILMSG) - 1;
4490 sppp_auth_send(&pap, sp, PAP_NAK, h->ident,
4491 sizeof mlen, (const char *)&mlen,
4492 sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
4497 /* action sca, perhaps tlu */
4498 if (sp->state[IDX_PAP] == STATE_REQ_SENT ||
4499 sp->state[IDX_PAP] == STATE_OPENED) {
4500 mlen = sizeof(SUCCMSG) - 1;
4501 sppp_auth_send(&pap, sp, PAP_ACK, h->ident,
4502 sizeof mlen, (const char *)&mlen,
4503 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
4506 if (sp->state[IDX_PAP] == STATE_REQ_SENT) {
4507 sppp_cp_change_state(&pap, sp, STATE_OPENED);
4512 /* ack and nak are his authproto */
4514 callout_stop(&sp->pap_my_to_ch);
4516 log(LOG_DEBUG, SPP_FMT "pap success",
4518 name_len = *((char *)h);
4519 if (len > 5 && name_len) {
4521 sppp_print_string((char*)(h+1), name_len);
4527 sp->pp_flags &= ~PP_NEEDAUTH;
4528 if (sp->myauth.proto == PPP_PAP &&
4529 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
4530 (sp->lcp.protos & (1 << IDX_PAP)) == 0) {
4532 * We are authenticator for PAP but didn't
4533 * complete yet. Leave it to tlu to proceed
4542 sppp_phase_network(sp);
4546 callout_stop (&sp->pap_my_to_ch);
4548 log(LOG_INFO, SPP_FMT "pap failure",
4550 name_len = *((char *)h);
4551 if (len > 5 && name_len) {
4553 sppp_print_string((char*)(h+1), name_len);
4557 log(LOG_INFO, SPP_FMT "pap failure\n",
4559 /* await LCP shutdown by authenticator */
4563 /* Unknown PAP packet type -- ignore. */
4565 log(LOG_DEBUG, SPP_FMT "pap corrupted input "
4566 "<0x%x id=0x%x len=%d",
4568 h->type, h->ident, ntohs(h->len));
4569 sppp_print_bytes((u_char*)(h+1), len-4);
4578 sppp_pap_init(struct sppp *sp)
4580 /* PAP doesn't have STATE_INITIAL at all. */
4581 sp->state[IDX_PAP] = STATE_CLOSED;
4582 sp->fail_counter[IDX_PAP] = 0;
4583 sp->pp_seq[IDX_PAP] = 0;
4584 sp->pp_rseq[IDX_PAP] = 0;
4585 callout_init(&sp->ch[IDX_PAP], CALLOUT_MPSAFE);
4586 callout_init(&sp->pap_my_to_ch, CALLOUT_MPSAFE);
4590 sppp_pap_open(struct sppp *sp)
4592 if (sp->hisauth.proto == PPP_PAP &&
4593 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
4594 /* we are authenticator for PAP, start our timer */
4595 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
4596 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
4598 if (sp->myauth.proto == PPP_PAP) {
4599 /* we are peer, send a request, and start a timer */
4601 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout,
4602 sppp_pap_my_TO, (void *)sp);
4607 sppp_pap_close(struct sppp *sp)
4609 if (sp->state[IDX_PAP] != STATE_CLOSED)
4610 sppp_cp_change_state(&pap, sp, STATE_CLOSED);
4614 * That's the timeout routine if we are authenticator. Since the
4615 * authenticator is basically passive in PAP, we can't do much here.
4618 sppp_pap_TO(void *cookie)
4620 struct sppp *sp = (struct sppp *)cookie;
4627 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n",
4629 sppp_state_name(sp->state[IDX_PAP]),
4630 sp->rst_counter[IDX_PAP]);
4632 if (--sp->rst_counter[IDX_PAP] < 0)
4634 switch (sp->state[IDX_PAP]) {
4635 case STATE_REQ_SENT:
4637 sppp_cp_change_state(&pap, sp, STATE_CLOSED);
4641 /* TO+ event, not very much we could do */
4642 switch (sp->state[IDX_PAP]) {
4643 case STATE_REQ_SENT:
4644 /* sppp_cp_change_state() will restart the timer */
4645 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
4654 * That's the timeout handler if we are peer. Since the peer is active,
4655 * we need to retransmit our PAP request since it is apparently lost.
4656 * XXX We should impose a max counter.
4659 sppp_pap_my_TO(void *cookie)
4661 struct sppp *sp = (struct sppp *)cookie;
4665 log(LOG_DEBUG, SPP_FMT "pap peer TO\n",
4674 sppp_pap_tlu(struct sppp *sp)
4679 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
4682 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
4683 SPP_ARGS(ifp), pap.name);
4687 /* indicate to LCP that we need to be closed down */
4688 sp->lcp.protos |= (1 << IDX_PAP);
4690 if (sp->pp_flags & PP_NEEDAUTH) {
4692 * Remote is authenticator, but his auth proto didn't
4693 * complete yet. Defer the transition to network
4702 sppp_phase_network(sp);
4706 sppp_pap_tld(struct sppp *sp)
4711 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp));
4712 callout_stop (&sp->ch[IDX_PAP]);
4713 callout_stop (&sp->pap_my_to_ch);
4714 sp->lcp.protos &= ~(1 << IDX_PAP);
4720 sppp_pap_scr(struct sppp *sp)
4722 u_char idlen, pwdlen;
4724 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP];
4725 pwdlen = sppp_strnlen(sp->myauth.secret, AUTHKEYLEN);
4726 idlen = sppp_strnlen(sp->myauth.name, AUTHNAMELEN);
4728 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP],
4729 sizeof idlen, (const char *)&idlen,
4730 (size_t)idlen, sp->myauth.name,
4731 sizeof pwdlen, (const char *)&pwdlen,
4732 (size_t)pwdlen, sp->myauth.secret,
4737 * Random miscellaneous functions.
4741 * Send a PAP or CHAP proto packet.
4743 * Varadic function, each of the elements for the ellipsis is of type
4744 * ``size_t mlen, const u_char *msg''. Processing will stop iff
4746 * NOTE: never declare variadic functions with types subject to type
4747 * promotion (i.e. u_char). This is asking for big trouble depending
4748 * on the architecture you are on...
4752 sppp_auth_send(const struct cp *cp, struct sppp *sp,
4753 unsigned int type, unsigned int id,
4757 struct ppp_header *h;
4758 struct lcp_header *lh;
4766 MGETHDR (m, M_DONTWAIT, MT_DATA);
4769 m->m_pkthdr.rcvif = 0;
4771 h = mtod (m, struct ppp_header*);
4772 h->address = PPP_ALLSTATIONS; /* broadcast address */
4773 h->control = PPP_UI; /* Unnumbered Info */
4774 h->protocol = htons(cp->proto);
4776 lh = (struct lcp_header*)(h + 1);
4779 p = (u_char*) (lh+1);
4784 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) {
4785 msg = va_arg(ap, const char *);
4787 if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN) {
4793 bcopy(msg, p, mlen);
4798 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
4799 lh->len = htons (LCP_HEADER_LEN + len);
4802 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
4803 SPP_ARGS(ifp), cp->name,
4804 sppp_auth_type_name(cp->proto, lh->type),
4805 lh->ident, ntohs(lh->len));
4806 sppp_print_bytes((u_char*) (lh+1), len);
4809 if (! IF_HANDOFF_ADJ(&sp->pp_cpq, m, ifp, 3))
4814 * Flush interface queue.
4817 sppp_qflush(struct ifqueue *ifq)
4832 * Send keepalive packets, every 10 seconds.
4835 sppp_keepalive(void *dummy)
4837 struct sppp *sp = (struct sppp*)dummy;
4838 struct ifnet *ifp = SP2IFP(sp);
4843 /* Keepalive mode disabled or channel down? */
4844 if (! (sp->pp_flags & PP_KEEPALIVE) ||
4845 ! (ifp->if_drv_flags & IFF_DRV_RUNNING))
4848 if (sp->pp_mode == PP_FR) {
4849 sppp_fr_keepalive (sp);
4853 /* No keepalive in PPP mode if LCP not opened yet. */
4854 if (sp->pp_mode != IFF_CISCO &&
4855 sp->pp_phase < PHASE_AUTHENTICATE)
4858 if (sp->pp_alivecnt == MAXALIVECNT) {
4859 /* No keepalive packets got. Stop the interface. */
4860 printf (SPP_FMT "down\n", SPP_ARGS(ifp));
4862 sppp_qflush (&sp->pp_cpq);
4863 if (sp->pp_mode != IFF_CISCO) {
4865 /* Shut down the PPP link. */
4867 /* Initiate negotiation. XXX */
4871 if (sp->pp_alivecnt <= MAXALIVECNT)
4873 if (sp->pp_mode == IFF_CISCO)
4874 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ,
4875 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]);
4876 else if (sp->pp_phase >= PHASE_AUTHENTICATE) {
4877 long nmagic = htonl (sp->lcp.magic);
4878 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP];
4879 sppp_cp_send (sp, PPP_LCP, ECHO_REQ,
4880 sp->lcp.echoid, 4, &nmagic);
4885 callout_reset(&sp->keepalive_callout, hz * 10, sppp_keepalive,
4890 * Get both IP addresses.
4893 sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst, u_long *srcmask)
4895 struct ifnet *ifp = SP2IFP(sp);
4897 struct sockaddr_in *si, *sm;
4903 * Pick the first AF_INET address from the list,
4904 * aliases don't make any sense on a p2p link anyway.
4908 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
4909 if (ifa->ifa_addr->sa_family == AF_INET) {
4910 si = (struct sockaddr_in *)ifa->ifa_addr;
4911 sm = (struct sockaddr_in *)ifa->ifa_netmask;
4916 if (si && si->sin_addr.s_addr) {
4917 ssrc = si->sin_addr.s_addr;
4919 *srcmask = ntohl(sm->sin_addr.s_addr);
4922 si = (struct sockaddr_in *)ifa->ifa_dstaddr;
4923 if (si && si->sin_addr.s_addr)
4924 ddst = si->sin_addr.s_addr;
4926 if_addr_runlock(ifp);
4928 if (dst) *dst = ntohl(ddst);
4929 if (src) *src = ntohl(ssrc);
4934 * Set my IP address. Must be called at splimp.
4937 sppp_set_ip_addr(struct sppp *sp, u_long src)
4941 struct sockaddr_in *si;
4942 struct in_ifaddr *ia;
4945 * Pick the first AF_INET address from the list,
4946 * aliases don't make any sense on a p2p link anyway.
4950 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
4951 if (ifa->ifa_addr->sa_family == AF_INET) {
4952 si = (struct sockaddr_in *)ifa->ifa_addr;
4959 if_addr_runlock(ifp);
4964 /* delete old route */
4965 error = rtinit(ifa, (int)RTM_DELETE, RTF_HOST);
4966 if (debug && error) {
4967 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit DEL failed, error=%d\n",
4968 SPP_ARGS(ifp), error);
4971 /* set new address */
4972 si->sin_addr.s_addr = htonl(src);
4975 LIST_REMOVE(ia, ia_hash);
4976 LIST_INSERT_HEAD(INADDR_HASH(si->sin_addr.s_addr), ia, ia_hash);
4977 IN_IFADDR_WUNLOCK();
4980 error = rtinit(ifa, (int)RTM_ADD, RTF_HOST);
4981 if (debug && error) {
4982 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit ADD failed, error=%d",
4983 SPP_ARGS(ifp), error);
4992 * Get both IPv6 addresses.
4995 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst,
4996 struct in6_addr *srcmask)
4998 struct ifnet *ifp = SP2IFP(sp);
5000 struct sockaddr_in6 *si, *sm;
5001 struct in6_addr ssrc, ddst;
5004 bzero(&ssrc, sizeof(ssrc));
5005 bzero(&ddst, sizeof(ddst));
5007 * Pick the first link-local AF_INET6 address from the list,
5008 * aliases don't make any sense on a p2p link anyway.
5012 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
5013 if (ifa->ifa_addr->sa_family == AF_INET6) {
5014 si = (struct sockaddr_in6 *)ifa->ifa_addr;
5015 sm = (struct sockaddr_in6 *)ifa->ifa_netmask;
5016 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr))
5020 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) {
5021 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc));
5023 bcopy(&sm->sin6_addr, srcmask,
5028 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr;
5029 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr))
5030 bcopy(&si->sin6_addr, &ddst, sizeof(ddst));
5034 bcopy(&ddst, dst, sizeof(*dst));
5036 bcopy(&ssrc, src, sizeof(*src));
5037 if_addr_runlock(ifp);
5040 #ifdef IPV6CP_MYIFID_DYN
5042 * Generate random ifid.
5045 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr)
5051 * Set my IPv6 address. Must be called at splimp.
5054 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src)
5058 struct sockaddr_in6 *sin6;
5061 * Pick the first link-local AF_INET6 address from the list,
5062 * aliases don't make any sense on a p2p link anyway.
5067 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
5068 if (ifa->ifa_addr->sa_family == AF_INET6) {
5069 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
5070 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
5076 if_addr_runlock(ifp);
5080 struct sockaddr_in6 new_sin6 = *sin6;
5082 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr));
5083 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1);
5084 if (debug && error) {
5085 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit "
5086 " failed, error=%d\n", SPP_ARGS(ifp), error);
5094 * Suggest a candidate address to be used by peer.
5097 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest)
5099 struct in6_addr myaddr;
5102 sppp_get_ip6_addrs(sp, &myaddr, 0, 0);
5104 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */
5106 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) {
5107 myaddr.s6_addr[14] ^= 0xff;
5108 myaddr.s6_addr[15] ^= 0xff;
5110 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff);
5111 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff);
5114 bcopy(&myaddr, suggest, sizeof(myaddr));
5119 sppp_params(struct sppp *sp, u_long cmd, void *data)
5122 struct ifreq *ifr = (struct ifreq *)data;
5123 struct spppreq *spr;
5126 if ((spr = malloc(sizeof(struct spppreq), M_TEMP, M_NOWAIT)) == 0)
5129 * ifr->ifr_data is supposed to point to a struct spppreq.
5130 * Check the cmd word first before attempting to fetch all the
5133 if ((subcmd = fuword(ifr->ifr_data)) == -1) {
5138 if (copyin((caddr_t)ifr->ifr_data, spr, sizeof(struct spppreq)) != 0) {
5144 case (u_long)SPPPIOGDEFS:
5145 if (cmd != SIOCGIFGENERIC) {
5150 * We copy over the entire current state, but clean
5151 * out some of the stuff we don't wanna pass up.
5152 * Remember, SIOCGIFGENERIC is unprotected, and can be
5153 * called by any user. No need to ever get PAP or
5154 * CHAP secrets back to userland anyway.
5156 spr->defs.pp_phase = sp->pp_phase;
5157 spr->defs.enable_vj = (sp->confflags & CONF_ENABLE_VJ) != 0;
5158 spr->defs.enable_ipv6 = (sp->confflags & CONF_ENABLE_IPV6) != 0;
5159 spr->defs.lcp = sp->lcp;
5160 spr->defs.ipcp = sp->ipcp;
5161 spr->defs.ipv6cp = sp->ipv6cp;
5162 spr->defs.myauth = sp->myauth;
5163 spr->defs.hisauth = sp->hisauth;
5164 bzero(spr->defs.myauth.secret, AUTHKEYLEN);
5165 bzero(spr->defs.myauth.challenge, AUTHKEYLEN);
5166 bzero(spr->defs.hisauth.secret, AUTHKEYLEN);
5167 bzero(spr->defs.hisauth.challenge, AUTHKEYLEN);
5169 * Fixup the LCP timeout value to milliseconds so
5170 * spppcontrol doesn't need to bother about the value
5171 * of "hz". We do the reverse calculation below when
5174 spr->defs.lcp.timeout = sp->lcp.timeout * 1000 / hz;
5175 rv = copyout(spr, (caddr_t)ifr->ifr_data,
5176 sizeof(struct spppreq));
5179 case (u_long)SPPPIOSDEFS:
5180 if (cmd != SIOCSIFGENERIC) {
5185 * We have a very specific idea of which fields we
5186 * allow being passed back from userland, so to not
5187 * clobber our current state. For one, we only allow
5188 * setting anything if LCP is in dead or establish
5189 * phase. Once the authentication negotiations
5190 * started, the authentication settings must not be
5191 * changed again. (The administrator can force an
5192 * ifconfig down in order to get LCP back into dead
5195 * Also, we only allow for authentication parameters to be
5198 * XXX Should allow to set or clear pp_flags.
5200 * Finally, if the respective authentication protocol to
5201 * be used is set differently than 0, but the secret is
5202 * passed as all zeros, we don't trash the existing secret.
5203 * This allows an administrator to change the system name
5204 * only without clobbering the secret (which he didn't get
5205 * back in a previous SPPPIOGDEFS call). However, the
5206 * secrets are cleared if the authentication protocol is
5208 if (sp->pp_phase != PHASE_DEAD &&
5209 sp->pp_phase != PHASE_ESTABLISH) {
5214 if ((spr->defs.myauth.proto != 0 && spr->defs.myauth.proto != PPP_PAP &&
5215 spr->defs.myauth.proto != PPP_CHAP) ||
5216 (spr->defs.hisauth.proto != 0 && spr->defs.hisauth.proto != PPP_PAP &&
5217 spr->defs.hisauth.proto != PPP_CHAP)) {
5222 if (spr->defs.myauth.proto == 0)
5223 /* resetting myauth */
5224 bzero(&sp->myauth, sizeof sp->myauth);
5226 /* setting/changing myauth */
5227 sp->myauth.proto = spr->defs.myauth.proto;
5228 bcopy(spr->defs.myauth.name, sp->myauth.name, AUTHNAMELEN);
5229 if (spr->defs.myauth.secret[0] != '\0')
5230 bcopy(spr->defs.myauth.secret, sp->myauth.secret,
5233 if (spr->defs.hisauth.proto == 0)
5234 /* resetting hisauth */
5235 bzero(&sp->hisauth, sizeof sp->hisauth);
5237 /* setting/changing hisauth */
5238 sp->hisauth.proto = spr->defs.hisauth.proto;
5239 sp->hisauth.flags = spr->defs.hisauth.flags;
5240 bcopy(spr->defs.hisauth.name, sp->hisauth.name, AUTHNAMELEN);
5241 if (spr->defs.hisauth.secret[0] != '\0')
5242 bcopy(spr->defs.hisauth.secret, sp->hisauth.secret,
5245 /* set LCP restart timer timeout */
5246 if (spr->defs.lcp.timeout != 0)
5247 sp->lcp.timeout = spr->defs.lcp.timeout * hz / 1000;
5248 /* set VJ enable and IPv6 disable flags */
5250 if (spr->defs.enable_vj)
5251 sp->confflags |= CONF_ENABLE_VJ;
5253 sp->confflags &= ~CONF_ENABLE_VJ;
5256 if (spr->defs.enable_ipv6)
5257 sp->confflags |= CONF_ENABLE_IPV6;
5259 sp->confflags &= ~CONF_ENABLE_IPV6;
5274 sppp_phase_network(struct sppp *sp)
5280 sp->pp_phase = PHASE_NETWORK;
5283 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
5284 sppp_phase_name(sp->pp_phase));
5286 /* Notify NCPs now. */
5287 for (i = 0; i < IDX_COUNT; i++)
5288 if ((cps[i])->flags & CP_NCP)
5291 /* Send Up events to all NCPs. */
5292 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
5293 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP))
5296 /* if no NCP is starting, all this was in vain, close down */
5297 sppp_lcp_check_and_close(sp);
5302 sppp_cp_type_name(u_char type)
5304 static char buf[12];
5306 case CONF_REQ: return "conf-req";
5307 case CONF_ACK: return "conf-ack";
5308 case CONF_NAK: return "conf-nak";
5309 case CONF_REJ: return "conf-rej";
5310 case TERM_REQ: return "term-req";
5311 case TERM_ACK: return "term-ack";
5312 case CODE_REJ: return "code-rej";
5313 case PROTO_REJ: return "proto-rej";
5314 case ECHO_REQ: return "echo-req";
5315 case ECHO_REPLY: return "echo-reply";
5316 case DISC_REQ: return "discard-req";
5318 snprintf (buf, sizeof(buf), "cp/0x%x", type);
5323 sppp_auth_type_name(u_short proto, u_char type)
5325 static char buf[12];
5329 case CHAP_CHALLENGE: return "challenge";
5330 case CHAP_RESPONSE: return "response";
5331 case CHAP_SUCCESS: return "success";
5332 case CHAP_FAILURE: return "failure";
5336 case PAP_REQ: return "req";
5337 case PAP_ACK: return "ack";
5338 case PAP_NAK: return "nak";
5341 snprintf (buf, sizeof(buf), "auth/0x%x", type);
5346 sppp_lcp_opt_name(u_char opt)
5348 static char buf[12];
5350 case LCP_OPT_MRU: return "mru";
5351 case LCP_OPT_ASYNC_MAP: return "async-map";
5352 case LCP_OPT_AUTH_PROTO: return "auth-proto";
5353 case LCP_OPT_QUAL_PROTO: return "qual-proto";
5354 case LCP_OPT_MAGIC: return "magic";
5355 case LCP_OPT_PROTO_COMP: return "proto-comp";
5356 case LCP_OPT_ADDR_COMP: return "addr-comp";
5358 snprintf (buf, sizeof(buf), "lcp/0x%x", opt);
5364 sppp_ipcp_opt_name(u_char opt)
5366 static char buf[12];
5368 case IPCP_OPT_ADDRESSES: return "addresses";
5369 case IPCP_OPT_COMPRESSION: return "compression";
5370 case IPCP_OPT_ADDRESS: return "address";
5372 snprintf (buf, sizeof(buf), "ipcp/0x%x", opt);
5379 sppp_ipv6cp_opt_name(u_char opt)
5381 static char buf[12];
5383 case IPV6CP_OPT_IFID: return "ifid";
5384 case IPV6CP_OPT_COMPRESSION: return "compression";
5386 sprintf (buf, "0x%x", opt);
5392 sppp_state_name(int state)
5395 case STATE_INITIAL: return "initial";
5396 case STATE_STARTING: return "starting";
5397 case STATE_CLOSED: return "closed";
5398 case STATE_STOPPED: return "stopped";
5399 case STATE_CLOSING: return "closing";
5400 case STATE_STOPPING: return "stopping";
5401 case STATE_REQ_SENT: return "req-sent";
5402 case STATE_ACK_RCVD: return "ack-rcvd";
5403 case STATE_ACK_SENT: return "ack-sent";
5404 case STATE_OPENED: return "opened";
5410 sppp_phase_name(enum ppp_phase phase)
5413 case PHASE_DEAD: return "dead";
5414 case PHASE_ESTABLISH: return "establish";
5415 case PHASE_TERMINATE: return "terminate";
5416 case PHASE_AUTHENTICATE: return "authenticate";
5417 case PHASE_NETWORK: return "network";
5423 sppp_proto_name(u_short proto)
5425 static char buf[12];
5427 case PPP_LCP: return "lcp";
5428 case PPP_IPCP: return "ipcp";
5429 case PPP_PAP: return "pap";
5430 case PPP_CHAP: return "chap";
5431 case PPP_IPV6CP: return "ipv6cp";
5433 snprintf(buf, sizeof(buf), "proto/0x%x", (unsigned)proto);
5438 sppp_print_bytes(const u_char *p, u_short len)
5441 log(-1, " %*D", len, p, "-");
5445 sppp_print_string(const char *p, u_short len)
5452 * Print only ASCII chars directly. RFC 1994 recommends
5453 * using only them, but we don't rely on it. */
5454 if (c < ' ' || c > '~')
5455 log(-1, "\\x%x", c);
5463 sppp_dotted_quad(u_long addr)
5466 sprintf(s, "%d.%d.%d.%d",
5467 (int)((addr >> 24) & 0xff),
5468 (int)((addr >> 16) & 0xff),
5469 (int)((addr >> 8) & 0xff),
5470 (int)(addr & 0xff));
5476 sppp_strnlen(u_char *p, int max)
5480 for (len = 0; len < max && *p; ++p)
5485 /* a dummy, used to drop uninteresting events */
5487 sppp_null(struct sppp *unused)
5489 /* do just nothing */