2 * Synchronous PPP/Cisco link level subroutines.
3 * Keepalive protocol implemented in both Cisco and PPP modes.
5 * Copyright (C) 1994-1996 Cronyx Engineering Ltd.
6 * Author: Serge Vakulenko, <vak@cronyx.ru>
8 * Heavily revamped to conform to RFC 1661.
9 * Copyright (C) 1997, 2001 Joerg Wunsch.
11 * This software is distributed with NO WARRANTIES, not even the implied
12 * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
14 * Authors grant any other persons or organisations permission to use
15 * or modify this software as long as this message is kept with the software,
16 * all derivative works or modified versions.
18 * From: Version 2.4, Thu Apr 30 17:17:21 MSD 1997
20 * $FreeBSD: src/sys/net/if_spppsubr.c,v 1.59.2.13 2002/07/03 15:44:41 joerg Exp $
23 #include <sys/param.h>
24 #include <sys/libkern.h>
27 #include "opt_inet6.h"
29 #include <sys/systm.h>
30 #include <sys/kernel.h>
31 #include <sys/module.h>
32 #include <sys/sockio.h>
33 #include <sys/socket.h>
34 #include <sys/syslog.h>
35 #include <sys/random.h>
36 #include <sys/thread2.h>
37 #include <sys/malloc.h>
42 #include <net/ifq_var.h>
43 #include <net/netisr.h>
44 #include <net/if_types.h>
45 #include <net/route.h>
46 #include <netinet/in.h>
47 #include <netinet/in_systm.h>
48 #include <netinet/ip.h>
49 #include <net/slcompress.h>
51 #include <machine/stdarg.h>
53 #include <netinet/in_var.h>
56 #include <netinet/tcp.h>
59 #include <netinet/if_ether.h>
63 #define IOCTL_CMD_T u_long
64 #define MAXALIVECNT 3 /* max. alive packets */
67 * Interface flags that can be set in an ifconfig command.
69 * Setting link0 will make the link passive, i.e. it will be marked
70 * as being administrative openable, but won't be opened to begin
71 * with. Incoming calls will be answered, or subsequent calls with
72 * -link1 will cause the administrative open of the LCP layer.
74 * Setting link1 will cause the link to auto-dial only as packets
77 * Setting IFF_DEBUG will syslog the option negotiation and state
78 * transitions at level kern.debug. Note: all logs consistently look
81 * <if-name><unit>: <proto-name> <additional info...>
83 * with <if-name><unit> being something like "bppp0", and <proto-name>
84 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc.
87 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
88 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */
89 #define IFF_CISCO IFF_LINK2 /* auto-dial on output */
91 #define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
92 #define PPP_UI 0x03 /* Unnumbered Information */
93 #define PPP_IP 0x0021 /* Internet Protocol */
94 #define PPP_ISO 0x0023 /* ISO OSI Protocol */
95 #define PPP_XNS 0x0025 /* Xerox NS Protocol */
96 #define PPP_VJ_COMP 0x002d /* VJ compressed TCP/IP */
97 #define PPP_VJ_UCOMP 0x002f /* VJ uncompressed TCP/IP */
98 #define PPP_IPV6 0x0057 /* Internet Protocol Version 6 */
99 #define PPP_LCP 0xc021 /* Link Control Protocol */
100 #define PPP_PAP 0xc023 /* Password Authentication Protocol */
101 #define PPP_CHAP 0xc223 /* Challenge-Handshake Auth Protocol */
102 #define PPP_IPCP 0x8021 /* Internet Protocol Control Protocol */
103 #define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */
105 #define CONF_REQ 1 /* PPP configure request */
106 #define CONF_ACK 2 /* PPP configure acknowledge */
107 #define CONF_NAK 3 /* PPP configure negative ack */
108 #define CONF_REJ 4 /* PPP configure reject */
109 #define TERM_REQ 5 /* PPP terminate request */
110 #define TERM_ACK 6 /* PPP terminate acknowledge */
111 #define CODE_REJ 7 /* PPP code reject */
112 #define PROTO_REJ 8 /* PPP protocol reject */
113 #define ECHO_REQ 9 /* PPP echo request */
114 #define ECHO_REPLY 10 /* PPP echo reply */
115 #define DISC_REQ 11 /* PPP discard request */
117 #define LCP_OPT_MRU 1 /* maximum receive unit */
118 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */
119 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */
120 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */
121 #define LCP_OPT_MAGIC 5 /* magic number */
122 #define LCP_OPT_RESERVED 6 /* reserved */
123 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */
124 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */
126 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */
127 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol (VJ) */
128 #define IPCP_OPT_ADDRESS 3 /* local IP address */
130 #define IPV6CP_OPT_IFID 1 /* interface identifier */
131 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */
133 #define IPCP_COMP_VJ 0x2d /* Code for VJ compression */
135 #define PAP_REQ 1 /* PAP name/password request */
136 #define PAP_ACK 2 /* PAP acknowledge */
137 #define PAP_NAK 3 /* PAP fail */
139 #define CHAP_CHALLENGE 1 /* CHAP challenge request */
140 #define CHAP_RESPONSE 2 /* CHAP challenge response */
141 #define CHAP_SUCCESS 3 /* CHAP response ok */
142 #define CHAP_FAILURE 4 /* CHAP response failed */
144 #define CHAP_MD5 5 /* hash algorithm - MD5 */
146 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */
147 #define CISCO_UNICAST 0x0f /* Cisco unicast address */
148 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */
149 #define CISCO_ADDR_REQ 0 /* Cisco address request */
150 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */
151 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */
153 /* states are named and numbered according to RFC 1661 */
154 #define STATE_INITIAL 0
155 #define STATE_STARTING 1
156 #define STATE_CLOSED 2
157 #define STATE_STOPPED 3
158 #define STATE_CLOSING 4
159 #define STATE_STOPPING 5
160 #define STATE_REQ_SENT 6
161 #define STATE_ACK_RCVD 7
162 #define STATE_ACK_SENT 8
163 #define STATE_OPENED 9
169 } __attribute__((__packed__
));
170 #define PPP_HEADER_LEN sizeof (struct ppp_header)
176 } __attribute__((__packed__
));
177 #define LCP_HEADER_LEN sizeof (struct lcp_header)
179 struct cisco_packet
{
186 } __attribute__((__packed__
));
187 #define CISCO_PACKET_LEN sizeof (struct cisco_packet)
190 * We follow the spelling and capitalization of RFC 1661 here, to make
191 * it easier comparing with the standard. Please refer to this RFC in
192 * case you can't make sense out of these abbreviation; it will also
193 * explain the semantics related to the various events and actions.
196 u_short proto
; /* PPP control protocol number */
197 u_char protoidx
; /* index into state table in struct sppp */
199 #define CP_LCP 0x01 /* this is the LCP */
200 #define CP_AUTH 0x02 /* this is an authentication protocol */
201 #define CP_NCP 0x04 /* this is a NCP */
202 #define CP_QUAL 0x08 /* this is a quality reporting protocol */
203 const char *name
; /* name of this control protocol */
205 void (*Up
)(struct sppp
*sp
);
206 void (*Down
)(struct sppp
*sp
);
207 void (*Open
)(struct sppp
*sp
);
208 void (*Close
)(struct sppp
*sp
);
209 void (*TO
)(void *sp
);
210 int (*RCR
)(struct sppp
*sp
, struct lcp_header
*h
, int len
);
211 void (*RCN_rej
)(struct sppp
*sp
, struct lcp_header
*h
, int len
);
212 void (*RCN_nak
)(struct sppp
*sp
, struct lcp_header
*h
, int len
);
214 void (*tlu
)(struct sppp
*sp
);
215 void (*tld
)(struct sppp
*sp
);
216 void (*tls
)(struct sppp
*sp
);
217 void (*tlf
)(struct sppp
*sp
);
218 void (*scr
)(struct sppp
*sp
);
221 static struct sppp
*spppq
;
222 static struct callout keepalive_timeout
;
224 #define SPP_FMT "%s: "
225 #define SPP_ARGS(ifp) (ifp)->if_xname
229 * The following disgusting hack gets around the problem that IP TOS
230 * can't be set yet. We want to put "interactive" traffic on a high
231 * priority queue. To decide if traffic is interactive, we check that
232 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control.
234 * XXX is this really still necessary? - joerg -
236 static u_short interactive_ports
[8] = {
240 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p))
243 /* almost every function needs these */
245 struct ifnet *ifp = &sp->pp_if; \
246 int debug = ifp->if_flags & IFF_DEBUG
248 static int sppp_output(struct ifnet
*ifp
, struct mbuf
*m
,
249 struct sockaddr
*dst
, struct rtentry
*rt
);
251 static void sppp_cisco_send(struct sppp
*sp
, int type
, long par1
, long par2
);
252 static void sppp_cisco_input(struct sppp
*sp
, struct mbuf
*m
);
254 static void sppp_cp_input(const struct cp
*cp
, struct sppp
*sp
,
256 static void sppp_cp_send(struct sppp
*sp
, u_short proto
, u_char type
,
257 u_char ident
, u_short len
, void *data
);
258 /* static void sppp_cp_timeout(void *arg); */
259 static void sppp_cp_change_state(const struct cp
*cp
, struct sppp
*sp
,
261 static void sppp_auth_send(const struct cp
*cp
,
262 struct sppp
*sp
, unsigned int type
, unsigned int id
,
265 static void sppp_up_event(const struct cp
*cp
, struct sppp
*sp
);
266 static void sppp_down_event(const struct cp
*cp
, struct sppp
*sp
);
267 static void sppp_open_event(const struct cp
*cp
, struct sppp
*sp
);
268 static void sppp_close_event(const struct cp
*cp
, struct sppp
*sp
);
269 static void sppp_to_event(const struct cp
*cp
, struct sppp
*sp
);
271 static void sppp_null(struct sppp
*sp
);
273 static void sppp_lcp_init(struct sppp
*sp
);
274 static void sppp_lcp_up(struct sppp
*sp
);
275 static void sppp_lcp_down(struct sppp
*sp
);
276 static void sppp_lcp_open(struct sppp
*sp
);
277 static void sppp_lcp_close(struct sppp
*sp
);
278 static void sppp_lcp_TO(void *sp
);
279 static int sppp_lcp_RCR(struct sppp
*sp
, struct lcp_header
*h
, int len
);
280 static void sppp_lcp_RCN_rej(struct sppp
*sp
, struct lcp_header
*h
, int len
);
281 static void sppp_lcp_RCN_nak(struct sppp
*sp
, struct lcp_header
*h
, int len
);
282 static void sppp_lcp_tlu(struct sppp
*sp
);
283 static void sppp_lcp_tld(struct sppp
*sp
);
284 static void sppp_lcp_tls(struct sppp
*sp
);
285 static void sppp_lcp_tlf(struct sppp
*sp
);
286 static void sppp_lcp_scr(struct sppp
*sp
);
287 static void sppp_lcp_check_and_close(struct sppp
*sp
);
288 static int sppp_ncp_check(struct sppp
*sp
);
290 static void sppp_ipcp_init(struct sppp
*sp
);
291 static void sppp_ipcp_up(struct sppp
*sp
);
292 static void sppp_ipcp_down(struct sppp
*sp
);
293 static void sppp_ipcp_open(struct sppp
*sp
);
294 static void sppp_ipcp_close(struct sppp
*sp
);
295 static void sppp_ipcp_TO(void *sp
);
296 static int sppp_ipcp_RCR(struct sppp
*sp
, struct lcp_header
*h
, int len
);
297 static void sppp_ipcp_RCN_rej(struct sppp
*sp
, struct lcp_header
*h
, int len
);
298 static void sppp_ipcp_RCN_nak(struct sppp
*sp
, struct lcp_header
*h
, int len
);
299 static void sppp_ipcp_tlu(struct sppp
*sp
);
300 static void sppp_ipcp_tld(struct sppp
*sp
);
301 static void sppp_ipcp_tls(struct sppp
*sp
);
302 static void sppp_ipcp_tlf(struct sppp
*sp
);
303 static void sppp_ipcp_scr(struct sppp
*sp
);
305 static void sppp_ipv6cp_init(struct sppp
*sp
);
306 static void sppp_ipv6cp_up(struct sppp
*sp
);
307 static void sppp_ipv6cp_down(struct sppp
*sp
);
308 static void sppp_ipv6cp_open(struct sppp
*sp
);
309 static void sppp_ipv6cp_close(struct sppp
*sp
);
310 static void sppp_ipv6cp_TO(void *sp
);
311 static int sppp_ipv6cp_RCR(struct sppp
*sp
, struct lcp_header
*h
, int len
);
312 static void sppp_ipv6cp_RCN_rej(struct sppp
*sp
, struct lcp_header
*h
, int len
);
313 static void sppp_ipv6cp_RCN_nak(struct sppp
*sp
, struct lcp_header
*h
, int len
);
314 static void sppp_ipv6cp_tlu(struct sppp
*sp
);
315 static void sppp_ipv6cp_tld(struct sppp
*sp
);
316 static void sppp_ipv6cp_tls(struct sppp
*sp
);
317 static void sppp_ipv6cp_tlf(struct sppp
*sp
);
318 static void sppp_ipv6cp_scr(struct sppp
*sp
);
320 static void sppp_pap_input(struct sppp
*sp
, struct mbuf
*m
);
321 static void sppp_pap_init(struct sppp
*sp
);
322 static void sppp_pap_open(struct sppp
*sp
);
323 static void sppp_pap_close(struct sppp
*sp
);
324 static void sppp_pap_TO(void *sp
);
325 static void sppp_pap_my_TO(void *sp
);
326 static void sppp_pap_tlu(struct sppp
*sp
);
327 static void sppp_pap_tld(struct sppp
*sp
);
328 static void sppp_pap_scr(struct sppp
*sp
);
330 static void sppp_chap_input(struct sppp
*sp
, struct mbuf
*m
);
331 static void sppp_chap_init(struct sppp
*sp
);
332 static void sppp_chap_open(struct sppp
*sp
);
333 static void sppp_chap_close(struct sppp
*sp
);
334 static void sppp_chap_TO(void *sp
);
335 static void sppp_chap_tlu(struct sppp
*sp
);
336 static void sppp_chap_tld(struct sppp
*sp
);
337 static void sppp_chap_scr(struct sppp
*sp
);
339 static const char *sppp_auth_type_name(u_short proto
, u_char type
);
340 static const char *sppp_cp_type_name(u_char type
);
341 static const char *sppp_dotted_quad(u_long addr
);
342 static const char *sppp_ipcp_opt_name(u_char opt
);
344 static const char *sppp_ipv6cp_opt_name(u_char opt
);
346 static const char *sppp_lcp_opt_name(u_char opt
);
347 static const char *sppp_phase_name(enum ppp_phase phase
);
348 static const char *sppp_proto_name(u_short proto
);
349 static const char *sppp_state_name(int state
);
350 static int sppp_params(struct sppp
*sp
, u_long cmd
, void *data
);
351 static void sppp_get_ip_addrs(struct sppp
*sp
, u_long
*src
, u_long
*dst
,
353 static void sppp_keepalive(void *dummy
);
354 static void sppp_phase_network(struct sppp
*sp
);
355 static void sppp_print_bytes(const u_char
*p
, u_short len
);
356 static void sppp_print_string(const char *p
, u_short len
);
357 static void sppp_set_ip_addr(struct sppp
*sp
, u_long src
);
359 static void sppp_get_ip6_addrs(struct sppp
*sp
, struct in6_addr
*src
,
360 struct in6_addr
*dst
, struct in6_addr
*srcmask
);
361 #ifdef IPV6CP_MYIFID_DYN
362 static void sppp_set_ip6_addr(struct sppp
*sp
, const struct in6_addr
*src
);
363 static void sppp_gen_ip6_addr(struct sppp
*sp
, const struct in6_addr
*src
);
365 static void sppp_suggest_ip6_addr(struct sppp
*sp
, struct in6_addr
*src
);
368 /* our control protocol descriptors */
369 static const struct cp lcp
= {
370 PPP_LCP
, IDX_LCP
, CP_LCP
, "lcp",
371 sppp_lcp_up
, sppp_lcp_down
, sppp_lcp_open
, sppp_lcp_close
,
372 sppp_lcp_TO
, sppp_lcp_RCR
, sppp_lcp_RCN_rej
, sppp_lcp_RCN_nak
,
373 sppp_lcp_tlu
, sppp_lcp_tld
, sppp_lcp_tls
, sppp_lcp_tlf
,
377 static const struct cp ipcp
= {
378 PPP_IPCP
, IDX_IPCP
, CP_NCP
, "ipcp",
379 sppp_ipcp_up
, sppp_ipcp_down
, sppp_ipcp_open
, sppp_ipcp_close
,
380 sppp_ipcp_TO
, sppp_ipcp_RCR
, sppp_ipcp_RCN_rej
, sppp_ipcp_RCN_nak
,
381 sppp_ipcp_tlu
, sppp_ipcp_tld
, sppp_ipcp_tls
, sppp_ipcp_tlf
,
385 static const struct cp ipv6cp
= {
386 PPP_IPV6CP
, IDX_IPV6CP
,
387 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/
393 sppp_ipv6cp_up
, sppp_ipv6cp_down
, sppp_ipv6cp_open
, sppp_ipv6cp_close
,
394 sppp_ipv6cp_TO
, sppp_ipv6cp_RCR
, sppp_ipv6cp_RCN_rej
, sppp_ipv6cp_RCN_nak
,
395 sppp_ipv6cp_tlu
, sppp_ipv6cp_tld
, sppp_ipv6cp_tls
, sppp_ipv6cp_tlf
,
399 static const struct cp pap
= {
400 PPP_PAP
, IDX_PAP
, CP_AUTH
, "pap",
401 sppp_null
, sppp_null
, sppp_pap_open
, sppp_pap_close
,
402 sppp_pap_TO
, 0, 0, 0,
403 sppp_pap_tlu
, sppp_pap_tld
, sppp_null
, sppp_null
,
407 static const struct cp chap
= {
408 PPP_CHAP
, IDX_CHAP
, CP_AUTH
, "chap",
409 sppp_null
, sppp_null
, sppp_chap_open
, sppp_chap_close
,
410 sppp_chap_TO
, 0, 0, 0,
411 sppp_chap_tlu
, sppp_chap_tld
, sppp_null
, sppp_null
,
415 static const struct cp
*cps
[IDX_COUNT
] = {
417 &ipcp
, /* IDX_IPCP */
418 &ipv6cp
, /* IDX_IPV6CP */
420 &chap
, /* IDX_CHAP */
424 sppp_modevent(module_t mod
, int type
, void *unused
)
428 callout_init(&keepalive_timeout
);
438 static moduledata_t spppmod
= {
443 MODULE_VERSION(sppp
, 1);
444 DECLARE_MODULE(sppp
, spppmod
, SI_SUB_DRIVERS
, SI_ORDER_ANY
);
447 * Exported functions, comprising our interface to the lower layer.
451 * Process the received packet.
454 sppp_input(struct ifnet
*ifp
, struct mbuf
*m
)
456 struct ppp_header
*h
;
458 struct sppp
*sp
= (struct sppp
*)ifp
;
460 int hlen
, vjlen
, do_account
= 0;
461 int debug
= ifp
->if_flags
& IFF_DEBUG
;
463 if (ifp
->if_flags
& IFF_UP
)
464 /* Count received bytes, add FCS and one flag */
465 IFNET_STAT_INC(ifp
, ibytes
, m
->m_pkthdr
.len
+ 3);
467 if (m
->m_pkthdr
.len
<= PPP_HEADER_LEN
) {
468 /* Too small packet, drop it. */
471 SPP_FMT
"input packet is too small, %d bytes\n",
472 SPP_ARGS(ifp
), m
->m_pkthdr
.len
);
476 IFNET_STAT_INC(ifp
, ierrors
, 1);
477 IFNET_STAT_INC(ifp
, iqdrops
, 1);
481 /* Get PPP header. */
482 h
= mtod (m
, struct ppp_header
*);
483 m_adj (m
, PPP_HEADER_LEN
);
485 switch (h
->address
) {
486 case PPP_ALLSTATIONS
:
487 if (h
->control
!= PPP_UI
)
489 if (sp
->pp_mode
== IFF_CISCO
) {
492 SPP_FMT
"PPP packet in Cisco mode "
493 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
495 h
->address
, h
->control
, ntohs(h
->protocol
));
498 switch (ntohs (h
->protocol
)) {
502 SPP_FMT
"rejecting protocol "
503 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
505 h
->address
, h
->control
, ntohs(h
->protocol
));
506 if (sp
->state
[IDX_LCP
] == STATE_OPENED
)
507 sppp_cp_send (sp
, PPP_LCP
, PROTO_REJ
,
508 ++sp
->pp_seq
[IDX_LCP
], m
->m_pkthdr
.len
+ 2,
510 IFNET_STAT_INC(ifp
, noproto
, 1);
513 sppp_cp_input(&lcp
, sp
, m
);
517 if (sp
->pp_phase
>= PHASE_AUTHENTICATE
)
518 sppp_pap_input(sp
, m
);
522 if (sp
->pp_phase
>= PHASE_AUTHENTICATE
)
523 sppp_chap_input(sp
, m
);
528 if (sp
->pp_phase
== PHASE_NETWORK
)
529 sppp_cp_input(&ipcp
, sp
, m
);
533 if (sp
->state
[IDX_IPCP
] == STATE_OPENED
) {
539 if (sp
->state
[IDX_IPCP
] == STATE_OPENED
) {
541 sl_uncompress_tcp_core(mtod(m
, u_char
*),
545 &iphdr
, &hlen
)) <= 0) {
548 SPP_FMT
"VJ uncompress failed on compressed packet\n",
554 * Trim the VJ header off the packet, and prepend
555 * the uncompressed IP header (which will usually
556 * end up in two chained mbufs since there's not
557 * enough leading space in the existing mbuf).
560 M_PREPEND(m
, hlen
, M_NOWAIT
);
563 bcopy(iphdr
, mtod(m
, u_char
*), hlen
);
570 if (sp
->state
[IDX_IPCP
] == STATE_OPENED
) {
571 if (sl_uncompress_tcp_core(mtod(m
, u_char
*),
573 TYPE_UNCOMPRESSED_TCP
,
575 &iphdr
, &hlen
) != 0) {
578 SPP_FMT
"VJ uncompress failed on uncompressed packet\n",
589 if (sp
->pp_phase
== PHASE_NETWORK
)
590 sppp_cp_input(&ipv6cp
, sp
, m
);
595 if (sp
->state
[IDX_IPV6CP
] == STATE_OPENED
) {
603 case CISCO_MULTICAST
:
605 /* Don't check the control field here (RFC 1547). */
606 if (sp
->pp_mode
!= IFF_CISCO
) {
609 SPP_FMT
"Cisco packet in PPP mode "
610 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
612 h
->address
, h
->control
, ntohs(h
->protocol
));
615 switch (ntohs (h
->protocol
)) {
617 IFNET_STAT_INC(ifp
, noproto
, 1);
619 case CISCO_KEEPALIVE
:
620 sppp_cisco_input ((struct sppp
*) ifp
, m
);
637 default: /* Invalid PPP packet. */
641 SPP_FMT
"invalid input packet "
642 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
644 h
->address
, h
->control
, ntohs(h
->protocol
));
648 if (! (ifp
->if_flags
& IFF_UP
) || isr
< 0)
653 netisr_queue(isr
, m
);
656 * Do only account for network packets, not for control
657 * packets. This is used by some subsystems to detect
661 sp
->pp_last_recv
= time_uptime
;
665 * Enqueue transmit packet.
668 sppp_output_serialized(struct ifnet
*ifp
, struct ifaltq_subque
*ifsq
,
669 struct mbuf
*m
, struct sockaddr
*dst
, struct rtentry
*rt
)
671 struct sppp
*sp
= (struct sppp
*) ifp
;
672 struct ppp_header
*h
;
673 struct ifqueue
*ifq
= NULL
;
675 int ipproto
= PPP_IP
;
676 int debug
= ifp
->if_flags
& IFF_DEBUG
;
677 struct altq_pktattr pktattr
;
681 if ((ifp
->if_flags
& IFF_UP
) == 0 ||
682 (ifp
->if_flags
& (IFF_RUNNING
| IFF_AUTO
)) == 0) {
691 if ((ifp
->if_flags
& (IFF_RUNNING
| IFF_AUTO
)) == IFF_AUTO
) {
696 * Hack to prevent the initialization-time generated
697 * IPv6 multicast packet to erroneously cause a
698 * dialout event in case IPv6 has been
699 * administratively disabled on that interface.
701 if (dst
->sa_family
== AF_INET6
&&
702 !(sp
->confflags
& CONF_ENABLE_IPV6
))
706 * Interface is not yet running, but auto-dial. Need
707 * to start LCP for it.
709 ifp
->if_flags
|= IFF_RUNNING
;
716 * if the queueing discipline needs packet classification,
717 * do it before prepending link headers.
719 ifq_classify(&ifp
->if_snd
, m
, dst
->sa_family
, &pktattr
);
722 if (dst
->sa_family
== AF_INET
) {
723 /* XXX Check mbuf length here? */
724 struct ip
*ip
= mtod (m
, struct ip
*);
725 struct tcphdr
*tcp
= (struct tcphdr
*) ((long*)ip
+ ip
->ip_hl
);
728 * When using dynamic local IP address assignment by using
729 * 0.0.0.0 as a local address, the first TCP session will
730 * not connect because the local TCP checksum is computed
731 * using 0.0.0.0 which will later become our real IP address
732 * so the TCP checksum computed at the remote end will
733 * become invalid. So we
734 * - don't let packets with src ip addr 0 thru
735 * - we flag TCP packets with src ip 0 as an error
738 if(ip
->ip_src
.s_addr
== INADDR_ANY
) /* -hm */
742 if(ip
->ip_p
== IPPROTO_TCP
)
743 return(EADDRNOTAVAIL
);
749 * Put low delay, telnet, rlogin and ftp control packets
750 * in front of the queue.
752 if (IF_QFULL (&sp
->pp_fastq
))
754 else if (ip
->ip_tos
& IPTOS_LOWDELAY
)
756 else if (m
->m_len
< sizeof *ip
+ sizeof *tcp
)
758 else if (ip
->ip_p
!= IPPROTO_TCP
)
760 else if (INTERACTIVE (ntohs (tcp
->th_sport
)))
762 else if (INTERACTIVE (ntohs (tcp
->th_dport
)))
766 * Do IP Header compression
768 if (sp
->pp_mode
!= IFF_CISCO
&& (sp
->ipcp
.flags
& IPCP_VJ
) &&
769 ip
->ip_p
== IPPROTO_TCP
)
770 switch (sl_compress_tcp(m
, ip
, sp
->pp_comp
,
771 sp
->ipcp
.compress_cid
)) {
772 case TYPE_COMPRESSED_TCP
:
773 ipproto
= PPP_VJ_COMP
;
775 case TYPE_UNCOMPRESSED_TCP
:
776 ipproto
= PPP_VJ_UCOMP
;
790 if (dst
->sa_family
== AF_INET6
) {
791 /* XXX do something tricky here? */
796 * Prepend general data packet PPP header. For now, IP only.
798 M_PREPEND (m
, PPP_HEADER_LEN
, M_NOWAIT
);
801 log(LOG_DEBUG
, SPP_FMT
"no memory for transmit header\n",
803 IFNET_STAT_INC(ifp
, oerrors
, 1);
808 * May want to check size of packet
809 * (albeit due to the implementation it's always enough)
811 h
= mtod (m
, struct ppp_header
*);
812 if (sp
->pp_mode
== IFF_CISCO
) {
813 h
->address
= CISCO_UNICAST
; /* unicast address */
816 h
->address
= PPP_ALLSTATIONS
; /* broadcast address */
817 h
->control
= PPP_UI
; /* Unnumbered Info */
820 switch (dst
->sa_family
) {
822 case AF_INET
: /* Internet Protocol */
823 if (sp
->pp_mode
== IFF_CISCO
)
824 h
->protocol
= htons (ETHERTYPE_IP
);
827 * Don't choke with an ENETDOWN early. It's
828 * possible that we just started dialing out,
829 * so don't drop the packet immediately. If
830 * we notice that we run out of buffer space
831 * below, we will however remember that we are
832 * not ready to carry IP packets, and return
833 * ENETDOWN, as opposed to ENOBUFS.
835 h
->protocol
= htons(ipproto
);
836 if (sp
->state
[IDX_IPCP
] != STATE_OPENED
)
842 case AF_INET6
: /* Internet Protocol */
843 if (sp
->pp_mode
== IFF_CISCO
)
844 h
->protocol
= htons (ETHERTYPE_IPV6
);
847 * Don't choke with an ENETDOWN early. It's
848 * possible that we just started dialing out,
849 * so don't drop the packet immediately. If
850 * we notice that we run out of buffer space
851 * below, we will however remember that we are
852 * not ready to carry IP packets, and return
853 * ENETDOWN, as opposed to ENOBUFS.
855 h
->protocol
= htons(PPP_IPV6
);
856 if (sp
->state
[IDX_IPV6CP
] != STATE_OPENED
)
863 IFNET_STAT_INC(ifp
, oerrors
, 1);
865 return (EAFNOSUPPORT
);
869 * Queue message on interface, and start output if interface
882 rv
= ifsq_enqueue(ifsq
, m
, &pktattr
);
885 IFNET_STAT_INC(ifp
, oqdrops
, 1);
889 if (!ifsq_is_oactive(ifsq
))
890 (*ifp
->if_start
) (ifp
, ifsq
);
893 * Count output packets and bytes.
894 * The packet length includes header, FCS and 1 flag,
895 * according to RFC 1333.
897 IFNET_STAT_INC(ifp
, obytes
, m
->m_pkthdr
.len
+ 3);
900 * Unlike in sppp_input(), we can always bump the timestamp
901 * here since sppp_output() is only called on behalf of
902 * network-layer traffic; control-layer traffic is handled
905 sp
->pp_last_sent
= time_uptime
;
912 sppp_output(struct ifnet
*ifp
, struct mbuf
*m
,
913 struct sockaddr
*dst
, struct rtentry
*rt
)
915 struct ifaltq_subque
*ifsq
= ifq_get_subq_default(&ifp
->if_snd
);
918 ifsq_serialize_hw(ifsq
);
919 error
= sppp_output_serialized(ifp
, ifsq
, m
, dst
, rt
);
920 ifsq_deserialize_hw(ifsq
);
926 sppp_attach(struct ifnet
*ifp
)
928 struct sppp
*sp
= (struct sppp
*) ifp
;
930 /* Initialize keepalive handler. */
932 callout_reset(&keepalive_timeout
, hz
* 10,
933 sppp_keepalive
, NULL
);
935 /* Insert new entry into the keepalive list. */
939 sp
->pp_if
.if_mtu
= PP_MTU
;
940 sp
->pp_if
.if_flags
= IFF_POINTOPOINT
| IFF_MULTICAST
;
941 sp
->pp_if
.if_type
= IFT_PPP
;
942 sp
->pp_if
.if_output
= sppp_output
;
944 sp
->pp_flags
= PP_KEEPALIVE
;
946 ifq_set_maxlen(&sp
->pp_if
.if_snd
, 32);
947 sp
->pp_fastq
.ifq_maxlen
= 32;
948 sp
->pp_cpq
.ifq_maxlen
= 20;
951 bzero(&sp
->pp_seq
[0], sizeof(sp
->pp_seq
));
952 bzero(&sp
->pp_rseq
[0], sizeof(sp
->pp_rseq
));
953 sp
->pp_phase
= PHASE_DEAD
;
955 sp
->pp_down
= lcp
.Down
;
956 sp
->pp_last_recv
= sp
->pp_last_sent
= time_uptime
;
959 sp
->confflags
|= CONF_ENABLE_VJ
;
962 sp
->confflags
|= CONF_ENABLE_IPV6
;
964 sp
->pp_comp
= kmalloc(sizeof(struct slcompress
), M_TEMP
, M_WAITOK
);
965 sl_compress_init(sp
->pp_comp
, -1);
968 sppp_ipv6cp_init(sp
);
974 sppp_detach(struct ifnet
*ifp
)
976 struct sppp
**q
, *p
, *sp
= (struct sppp
*) ifp
;
979 /* Remove the entry from the keepalive list. */
980 for (q
= &spppq
; (p
= *q
); q
= &p
->pp_next
)
986 /* Stop keepalive handler. */
988 callout_stop(&keepalive_timeout
);
990 for (i
= 0; i
< IDX_COUNT
; i
++)
991 callout_stop(&sp
->timeout
[i
]);
992 callout_stop(&sp
->pap_my_to
);
996 * Flush the interface output queue.
999 sppp_flush(struct ifnet
*ifp
)
1001 struct sppp
*sp
= (struct sppp
*) ifp
;
1003 ifq_purge_all(&sp
->pp_if
.if_snd
);
1004 IF_DRAIN(&sp
->pp_fastq
);
1005 IF_DRAIN(&sp
->pp_cpq
);
1009 * Check if the output queue is empty.
1012 sppp_isempty(struct ifnet
*ifp
)
1014 struct sppp
*sp
= (struct sppp
*) ifp
;
1018 empty
= IF_QEMPTY(&sp
->pp_fastq
) && IF_QEMPTY(&sp
->pp_cpq
) &&
1019 ifsq_is_empty(ifq_get_subq_default(&sp
->pp_if
.if_snd
));
1025 * Get next packet to send.
1028 sppp_dequeue(struct ifnet
*ifp
)
1030 struct sppp
*sp
= (struct sppp
*) ifp
;
1036 * Process only the control protocol queue until we have at
1037 * least one NCP open.
1039 * Do always serve all three queues in Cisco mode.
1041 IF_DEQUEUE(&sp
->pp_cpq
, m
);
1043 (sppp_ncp_check(sp
) || sp
->pp_mode
== IFF_CISCO
)) {
1044 IF_DEQUEUE(&sp
->pp_fastq
, m
);
1047 ifq_get_subq_default(&sp
->pp_if
.if_snd
));
1056 * Pick the next packet, do not remove it from the queue.
1059 sppp_pick(struct ifnet
*ifp
)
1061 struct sppp
*sp
= (struct sppp
*)ifp
;
1066 m
= sp
->pp_cpq
.ifq_head
;
1068 (sp
->pp_phase
== PHASE_NETWORK
|| sp
->pp_mode
== IFF_CISCO
)) {
1069 if ((m
= sp
->pp_fastq
.ifq_head
) == NULL
)
1070 m
= ifsq_poll(ifq_get_subq_default(&sp
->pp_if
.if_snd
));
1078 * Process an ioctl request. Called on low priority level.
1081 sppp_ioctl(struct ifnet
*ifp
, IOCTL_CMD_T cmd
, void *data
)
1083 struct ifreq
*ifr
= (struct ifreq
*) data
;
1084 struct sppp
*sp
= (struct sppp
*) ifp
;
1085 int rv
, going_up
, going_down
, newmode
;
1092 case SIOCSIFDSTADDR
:
1096 /* set the interface "up" when assigning an IP address */
1097 ifp
->if_flags
|= IFF_UP
;
1098 /* fall through... */
1101 going_up
= ifp
->if_flags
& IFF_UP
&&
1102 (ifp
->if_flags
& IFF_RUNNING
) == 0;
1103 going_down
= (ifp
->if_flags
& IFF_UP
) == 0 &&
1104 ifp
->if_flags
& IFF_RUNNING
;
1106 newmode
= ifp
->if_flags
& IFF_PASSIVE
;
1108 newmode
= ifp
->if_flags
& IFF_AUTO
;
1110 newmode
= ifp
->if_flags
& IFF_CISCO
;
1111 ifp
->if_flags
&= ~(IFF_PASSIVE
| IFF_AUTO
| IFF_CISCO
);
1112 ifp
->if_flags
|= newmode
;
1114 if (newmode
!= sp
->pp_mode
) {
1117 going_up
= ifp
->if_flags
& IFF_RUNNING
;
1121 if (sp
->pp_mode
!= IFF_CISCO
)
1123 else if (sp
->pp_tlf
)
1126 ifp
->if_flags
&= ~IFF_RUNNING
;
1127 sp
->pp_mode
= newmode
;
1131 if (sp
->pp_mode
!= IFF_CISCO
)
1133 sp
->pp_mode
= newmode
;
1134 if (sp
->pp_mode
== 0) {
1135 ifp
->if_flags
|= IFF_RUNNING
;
1138 if (sp
->pp_mode
== IFF_CISCO
) {
1141 ifp
->if_flags
|= IFF_RUNNING
;
1149 #define ifr_mtu ifr_metric
1152 if (ifr
->ifr_mtu
< 128 || ifr
->ifr_mtu
> sp
->lcp
.their_mru
) {
1156 ifp
->if_mtu
= ifr
->ifr_mtu
;
1161 if (*(short*)data
< 128 || *(short*)data
> sp
->lcp
.their_mru
) {
1165 ifp
->if_mtu
= *(short*)data
;
1170 ifr
->ifr_mtu
= ifp
->if_mtu
;
1175 *(short*)data
= ifp
->if_mtu
;
1182 case SIOCGIFGENERIC
:
1183 case SIOCSIFGENERIC
:
1184 rv
= sppp_params(sp
, cmd
, data
);
1196 * Cisco framing implementation.
1200 * Handle incoming Cisco keepalive protocol packets.
1203 sppp_cisco_input(struct sppp
*sp
, struct mbuf
*m
)
1206 struct cisco_packet
*h
;
1209 if (m
->m_pkthdr
.len
< CISCO_PACKET_LEN
) {
1212 SPP_FMT
"cisco invalid packet length: %d bytes\n",
1213 SPP_ARGS(ifp
), m
->m_pkthdr
.len
);
1216 h
= mtod (m
, struct cisco_packet
*);
1219 SPP_FMT
"cisco input: %d bytes "
1220 "<0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
1221 SPP_ARGS(ifp
), m
->m_pkthdr
.len
,
1222 (u_long
)ntohl (h
->type
), h
->par1
, h
->par2
, (u_int
)h
->rel
,
1223 (u_int
)h
->time0
, (u_int
)h
->time1
);
1224 switch (ntohl (h
->type
)) {
1227 log(-1, SPP_FMT
"cisco unknown packet type: 0x%lx\n",
1228 SPP_ARGS(ifp
), (u_long
)ntohl (h
->type
));
1230 case CISCO_ADDR_REPLY
:
1231 /* Reply on address request, ignore */
1233 case CISCO_KEEPALIVE_REQ
:
1234 sp
->pp_alivecnt
= 0;
1235 sp
->pp_rseq
[IDX_LCP
] = ntohl (h
->par1
);
1236 if (sp
->pp_seq
[IDX_LCP
] == sp
->pp_rseq
[IDX_LCP
]) {
1237 /* Local and remote sequence numbers are equal.
1238 * Probably, the line is in loopback mode. */
1239 if (sp
->pp_loopcnt
>= MAXALIVECNT
) {
1240 kprintf (SPP_FMT
"loopback\n",
1243 if (ifp
->if_flags
& IFF_UP
) {
1245 IF_DRAIN(&sp
->pp_cpq
);
1250 /* Generate new local sequence number */
1251 sp
->pp_seq
[IDX_LCP
] = krandom();
1255 if (! (ifp
->if_flags
& IFF_UP
) &&
1256 (ifp
->if_flags
& IFF_RUNNING
)) {
1258 kprintf (SPP_FMT
"up\n", SPP_ARGS(ifp
));
1261 case CISCO_ADDR_REQ
:
1262 sppp_get_ip_addrs(sp
, &me
, 0, &mymask
);
1264 sppp_cisco_send(sp
, CISCO_ADDR_REPLY
, me
, mymask
);
1270 * Send Cisco keepalive packet.
1273 sppp_cisco_send(struct sppp
*sp
, int type
, long par1
, long par2
)
1276 struct ppp_header
*h
;
1277 struct cisco_packet
*ch
;
1280 struct ifaltq_subque
*ifsq
;
1282 getmicrouptime(&tv
);
1284 MGETHDR (m
, M_NOWAIT
, MT_DATA
);
1287 m
->m_pkthdr
.len
= m
->m_len
= PPP_HEADER_LEN
+ CISCO_PACKET_LEN
;
1288 m
->m_pkthdr
.rcvif
= 0;
1290 h
= mtod (m
, struct ppp_header
*);
1291 h
->address
= CISCO_MULTICAST
;
1293 h
->protocol
= htons (CISCO_KEEPALIVE
);
1295 ch
= (struct cisco_packet
*) (h
+ 1);
1296 ch
->type
= htonl (type
);
1297 ch
->par1
= htonl (par1
);
1298 ch
->par2
= htonl (par2
);
1301 ch
->time0
= htons ((u_short
) (tv
.tv_sec
>> 16));
1302 ch
->time1
= htons ((u_short
) tv
.tv_sec
);
1306 SPP_FMT
"cisco output: <0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
1307 SPP_ARGS(ifp
), (u_long
)ntohl (ch
->type
), ch
->par1
,
1308 ch
->par2
, (u_int
)ch
->rel
, (u_int
)ch
->time0
, (u_int
)ch
->time1
);
1310 if (IF_QFULL (&sp
->pp_cpq
)) {
1311 IF_DROP (&sp
->pp_fastq
);
1314 IF_ENQUEUE (&sp
->pp_cpq
, m
);
1315 ifsq
= ifq_get_subq_default(&ifp
->if_snd
);
1316 if (!ifsq_is_oactive(ifsq
))
1317 (*ifp
->if_start
) (ifp
, ifsq
);
1318 IFNET_STAT_INC(ifp
, obytes
, m
->m_pkthdr
.len
+ 3);
1322 * PPP protocol implementation.
1326 * Send PPP control protocol packet.
1329 sppp_cp_send(struct sppp
*sp
, u_short proto
, u_char type
,
1330 u_char ident
, u_short len
, void *data
)
1333 struct ppp_header
*h
;
1334 struct lcp_header
*lh
;
1336 struct ifaltq_subque
*ifsq
;
1338 if (len
> MHLEN
- PPP_HEADER_LEN
- LCP_HEADER_LEN
)
1339 len
= MHLEN
- PPP_HEADER_LEN
- LCP_HEADER_LEN
;
1340 MGETHDR (m
, M_NOWAIT
, MT_DATA
);
1343 m
->m_pkthdr
.len
= m
->m_len
= PPP_HEADER_LEN
+ LCP_HEADER_LEN
+ len
;
1344 m
->m_pkthdr
.rcvif
= 0;
1346 h
= mtod (m
, struct ppp_header
*);
1347 h
->address
= PPP_ALLSTATIONS
; /* broadcast address */
1348 h
->control
= PPP_UI
; /* Unnumbered Info */
1349 h
->protocol
= htons (proto
); /* Link Control Protocol */
1351 lh
= (struct lcp_header
*) (h
+ 1);
1354 lh
->len
= htons (LCP_HEADER_LEN
+ len
);
1356 bcopy (data
, lh
+1, len
);
1359 log(LOG_DEBUG
, SPP_FMT
"%s output <%s id=0x%x len=%d",
1361 sppp_proto_name(proto
),
1362 sppp_cp_type_name (lh
->type
), lh
->ident
,
1364 sppp_print_bytes ((u_char
*) (lh
+1), len
);
1367 if (IF_QFULL (&sp
->pp_cpq
)) {
1368 IF_DROP (&sp
->pp_fastq
);
1370 IFNET_STAT_INC(ifp
, oerrors
, 1);
1372 IF_ENQUEUE (&sp
->pp_cpq
, m
);
1373 ifsq
= ifq_get_subq_default(&ifp
->if_snd
);
1374 if (!ifsq_is_oactive(ifsq
))
1375 (*ifp
->if_start
) (ifp
, ifsq
);
1376 IFNET_STAT_INC(ifp
, obytes
, m
->m_pkthdr
.len
+ 3);
1380 * Handle incoming PPP control protocol packets.
1383 sppp_cp_input(const struct cp
*cp
, struct sppp
*sp
, struct mbuf
*m
)
1386 struct lcp_header
*h
;
1387 int printlen
, len
= m
->m_pkthdr
.len
;
1394 SPP_FMT
"%s invalid packet length: %d bytes\n",
1395 SPP_ARGS(ifp
), cp
->name
, len
);
1398 h
= mtod (m
, struct lcp_header
*);
1400 printlen
= ntohs(h
->len
);
1402 SPP_FMT
"%s input(%s): <%s id=0x%x len=%d",
1403 SPP_ARGS(ifp
), cp
->name
,
1404 sppp_state_name(sp
->state
[cp
->protoidx
]),
1405 sppp_cp_type_name (h
->type
), h
->ident
, printlen
);
1409 sppp_print_bytes ((u_char
*) (h
+1), printlen
- 4);
1412 if (len
> ntohs (h
->len
))
1413 len
= ntohs (h
->len
);
1414 p
= (u_char
*)(h
+ 1);
1419 log(-1, SPP_FMT
"%s invalid conf-req length %d\n",
1420 SPP_ARGS(ifp
), cp
->name
,
1422 IFNET_STAT_INC(ifp
, ierrors
, 1);
1425 /* handle states where RCR doesn't get a SCA/SCN */
1426 switch (sp
->state
[cp
->protoidx
]) {
1428 case STATE_STOPPING
:
1431 sppp_cp_send(sp
, cp
->proto
, TERM_ACK
, h
->ident
,
1435 rv
= (cp
->RCR
)(sp
, h
, len
);
1437 /* fatal error, shut down */
1442 switch (sp
->state
[cp
->protoidx
]) {
1446 /* fall through... */
1447 case STATE_ACK_SENT
:
1448 case STATE_REQ_SENT
:
1450 * sppp_cp_change_state() have the side effect of
1451 * restarting the timeouts. We want to avoid that
1452 * if the state don't change, otherwise we won't
1453 * ever timeout and resend a configuration request
1456 if (sp
->state
[cp
->protoidx
] == (rv
? STATE_ACK_SENT
:
1459 sppp_cp_change_state(cp
, sp
, rv
?
1460 STATE_ACK_SENT
: STATE_REQ_SENT
);
1463 sp
->rst_counter
[cp
->protoidx
] = sp
->lcp
.max_configure
;
1465 sppp_cp_change_state(cp
, sp
, rv
?
1466 STATE_ACK_SENT
: STATE_REQ_SENT
);
1468 case STATE_ACK_RCVD
:
1470 sppp_cp_change_state(cp
, sp
, STATE_OPENED
);
1472 log(LOG_DEBUG
, SPP_FMT
"%s tlu\n",
1477 sppp_cp_change_state(cp
, sp
, STATE_ACK_RCVD
);
1480 kprintf(SPP_FMT
"%s illegal %s in state %s\n",
1481 SPP_ARGS(ifp
), cp
->name
,
1482 sppp_cp_type_name(h
->type
),
1483 sppp_state_name(sp
->state
[cp
->protoidx
]));
1484 IFNET_STAT_INC(ifp
, ierrors
, 1);
1488 if (h
->ident
!= sp
->confid
[cp
->protoidx
]) {
1490 log(-1, SPP_FMT
"%s id mismatch 0x%x != 0x%x\n",
1491 SPP_ARGS(ifp
), cp
->name
,
1492 h
->ident
, sp
->confid
[cp
->protoidx
]);
1493 IFNET_STAT_INC(ifp
, ierrors
, 1);
1496 switch (sp
->state
[cp
->protoidx
]) {
1499 sppp_cp_send(sp
, cp
->proto
, TERM_ACK
, h
->ident
, 0, 0);
1502 case STATE_STOPPING
:
1504 case STATE_REQ_SENT
:
1505 sp
->rst_counter
[cp
->protoidx
] = sp
->lcp
.max_configure
;
1506 sppp_cp_change_state(cp
, sp
, STATE_ACK_RCVD
);
1511 case STATE_ACK_RCVD
:
1513 sppp_cp_change_state(cp
, sp
, STATE_REQ_SENT
);
1515 case STATE_ACK_SENT
:
1516 sp
->rst_counter
[cp
->protoidx
] = sp
->lcp
.max_configure
;
1517 sppp_cp_change_state(cp
, sp
, STATE_OPENED
);
1519 log(LOG_DEBUG
, SPP_FMT
"%s tlu\n",
1520 SPP_ARGS(ifp
), cp
->name
);
1524 kprintf(SPP_FMT
"%s illegal %s in state %s\n",
1525 SPP_ARGS(ifp
), cp
->name
,
1526 sppp_cp_type_name(h
->type
),
1527 sppp_state_name(sp
->state
[cp
->protoidx
]));
1528 IFNET_STAT_INC(ifp
, ierrors
, 1);
1533 if (h
->ident
!= sp
->confid
[cp
->protoidx
]) {
1535 log(-1, SPP_FMT
"%s id mismatch 0x%x != 0x%x\n",
1536 SPP_ARGS(ifp
), cp
->name
,
1537 h
->ident
, sp
->confid
[cp
->protoidx
]);
1538 IFNET_STAT_INC(ifp
, ierrors
, 1);
1541 if (h
->type
== CONF_NAK
)
1542 (cp
->RCN_nak
)(sp
, h
, len
);
1544 (cp
->RCN_rej
)(sp
, h
, len
);
1546 switch (sp
->state
[cp
->protoidx
]) {
1549 sppp_cp_send(sp
, cp
->proto
, TERM_ACK
, h
->ident
, 0, 0);
1551 case STATE_REQ_SENT
:
1552 case STATE_ACK_SENT
:
1553 sp
->rst_counter
[cp
->protoidx
] = sp
->lcp
.max_configure
;
1555 * Slow things down a bit if we think we might be
1556 * in loopback. Depend on the timeout to send the
1557 * next configuration request.
1566 case STATE_ACK_RCVD
:
1567 sppp_cp_change_state(cp
, sp
, STATE_REQ_SENT
);
1571 case STATE_STOPPING
:
1574 kprintf(SPP_FMT
"%s illegal %s in state %s\n",
1575 SPP_ARGS(ifp
), cp
->name
,
1576 sppp_cp_type_name(h
->type
),
1577 sppp_state_name(sp
->state
[cp
->protoidx
]));
1578 IFNET_STAT_INC(ifp
, ierrors
, 1);
1583 switch (sp
->state
[cp
->protoidx
]) {
1584 case STATE_ACK_RCVD
:
1585 case STATE_ACK_SENT
:
1586 sppp_cp_change_state(cp
, sp
, STATE_REQ_SENT
);
1591 case STATE_STOPPING
:
1592 case STATE_REQ_SENT
:
1594 /* Send Terminate-Ack packet. */
1596 log(LOG_DEBUG
, SPP_FMT
"%s send terminate-ack\n",
1597 SPP_ARGS(ifp
), cp
->name
);
1598 sppp_cp_send(sp
, cp
->proto
, TERM_ACK
, h
->ident
, 0, 0);
1602 sp
->rst_counter
[cp
->protoidx
] = 0;
1603 sppp_cp_change_state(cp
, sp
, STATE_STOPPING
);
1607 kprintf(SPP_FMT
"%s illegal %s in state %s\n",
1608 SPP_ARGS(ifp
), cp
->name
,
1609 sppp_cp_type_name(h
->type
),
1610 sppp_state_name(sp
->state
[cp
->protoidx
]));
1611 IFNET_STAT_INC(ifp
, ierrors
, 1);
1615 switch (sp
->state
[cp
->protoidx
]) {
1618 case STATE_REQ_SENT
:
1619 case STATE_ACK_SENT
:
1622 sppp_cp_change_state(cp
, sp
, STATE_CLOSED
);
1625 case STATE_STOPPING
:
1626 sppp_cp_change_state(cp
, sp
, STATE_STOPPED
);
1629 case STATE_ACK_RCVD
:
1630 sppp_cp_change_state(cp
, sp
, STATE_REQ_SENT
);
1635 sppp_cp_change_state(cp
, sp
, STATE_ACK_RCVD
);
1638 kprintf(SPP_FMT
"%s illegal %s in state %s\n",
1639 SPP_ARGS(ifp
), cp
->name
,
1640 sppp_cp_type_name(h
->type
),
1641 sppp_state_name(sp
->state
[cp
->protoidx
]));
1642 IFNET_STAT_INC(ifp
, ierrors
, 1);
1646 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
1648 SPP_FMT
"%s: ignoring RXJ (%s) for proto 0x%x, "
1649 "danger will robinson\n",
1650 SPP_ARGS(ifp
), cp
->name
,
1651 sppp_cp_type_name(h
->type
), ntohs(*((u_short
*)p
)));
1652 switch (sp
->state
[cp
->protoidx
]) {
1655 case STATE_REQ_SENT
:
1656 case STATE_ACK_SENT
:
1658 case STATE_STOPPING
:
1661 case STATE_ACK_RCVD
:
1662 sppp_cp_change_state(cp
, sp
, STATE_REQ_SENT
);
1665 kprintf(SPP_FMT
"%s illegal %s in state %s\n",
1666 SPP_ARGS(ifp
), cp
->name
,
1667 sppp_cp_type_name(h
->type
),
1668 sppp_state_name(sp
->state
[cp
->protoidx
]));
1669 IFNET_STAT_INC(ifp
, ierrors
, 1);
1675 const struct cp
*upper
;
1681 proto
= ntohs(*((u_int16_t
*)p
));
1682 for (i
= 0; i
< IDX_COUNT
; i
++) {
1683 if (cps
[i
]->proto
== proto
) {
1691 if (catastrophic
|| debug
)
1692 log(catastrophic
? LOG_INFO
: LOG_DEBUG
,
1693 SPP_FMT
"%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n",
1694 SPP_ARGS(ifp
), cp
->name
, catastrophic
? '-' : '+',
1695 sppp_cp_type_name(h
->type
), proto
,
1696 upper
? upper
->name
: "unknown",
1697 upper
? sppp_state_name(sp
->state
[upper
->protoidx
]) : "?");
1700 * if we got RXJ+ against conf-req, the peer does not implement
1701 * this particular protocol type. terminate the protocol.
1703 if (upper
&& !catastrophic
) {
1704 if (sp
->state
[upper
->protoidx
] == STATE_REQ_SENT
) {
1710 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
1711 switch (sp
->state
[cp
->protoidx
]) {
1714 case STATE_REQ_SENT
:
1715 case STATE_ACK_SENT
:
1717 case STATE_STOPPING
:
1720 case STATE_ACK_RCVD
:
1721 sppp_cp_change_state(cp
, sp
, STATE_REQ_SENT
);
1724 kprintf(SPP_FMT
"%s illegal %s in state %s\n",
1725 SPP_ARGS(ifp
), cp
->name
,
1726 sppp_cp_type_name(h
->type
),
1727 sppp_state_name(sp
->state
[cp
->protoidx
]));
1728 IFNET_STAT_INC(ifp
, ierrors
, 1);
1733 if (cp
->proto
!= PPP_LCP
)
1735 /* Discard the packet. */
1738 if (cp
->proto
!= PPP_LCP
)
1740 if (sp
->state
[cp
->protoidx
] != STATE_OPENED
) {
1742 log(-1, SPP_FMT
"lcp echo req but lcp closed\n",
1744 IFNET_STAT_INC(ifp
, ierrors
, 1);
1749 log(-1, SPP_FMT
"invalid lcp echo request "
1750 "packet length: %d bytes\n",
1751 SPP_ARGS(ifp
), len
);
1754 if ((sp
->lcp
.opts
& (1 << LCP_OPT_MAGIC
)) &&
1755 ntohl (*(long*)(h
+1)) == sp
->lcp
.magic
) {
1756 /* Line loopback mode detected. */
1757 kprintf(SPP_FMT
"loopback\n", SPP_ARGS(ifp
));
1758 sp
->pp_loopcnt
= MAXALIVECNT
* 5;
1760 IF_DRAIN(&sp
->pp_cpq
);
1762 /* Shut down the PPP link. */
1768 *(long*)(h
+1) = htonl (sp
->lcp
.magic
);
1770 log(-1, SPP_FMT
"got lcp echo req, sending echo rep\n",
1772 sppp_cp_send (sp
, PPP_LCP
, ECHO_REPLY
, h
->ident
, len
-4, h
+1);
1775 if (cp
->proto
!= PPP_LCP
)
1777 if (h
->ident
!= sp
->lcp
.echoid
) {
1778 IFNET_STAT_INC(ifp
, ierrors
, 1);
1783 log(-1, SPP_FMT
"lcp invalid echo reply "
1784 "packet length: %d bytes\n",
1785 SPP_ARGS(ifp
), len
);
1789 log(-1, SPP_FMT
"lcp got echo rep\n",
1791 if (!(sp
->lcp
.opts
& (1 << LCP_OPT_MAGIC
)) ||
1792 ntohl (*(long*)(h
+1)) != sp
->lcp
.magic
)
1793 sp
->pp_alivecnt
= 0;
1796 /* Unknown packet type -- send Code-Reject packet. */
1799 log(-1, SPP_FMT
"%s send code-rej for 0x%x\n",
1800 SPP_ARGS(ifp
), cp
->name
, h
->type
);
1801 sppp_cp_send(sp
, cp
->proto
, CODE_REJ
,
1802 ++sp
->pp_seq
[cp
->protoidx
], m
->m_pkthdr
.len
, h
);
1803 IFNET_STAT_INC(ifp
, ierrors
, 1);
1809 * The generic part of all Up/Down/Open/Close/TO event handlers.
1810 * Basically, the state transition handling in the automaton.
1813 sppp_up_event(const struct cp
*cp
, struct sppp
*sp
)
1818 log(LOG_DEBUG
, SPP_FMT
"%s up(%s)\n",
1819 SPP_ARGS(ifp
), cp
->name
,
1820 sppp_state_name(sp
->state
[cp
->protoidx
]));
1822 switch (sp
->state
[cp
->protoidx
]) {
1824 sppp_cp_change_state(cp
, sp
, STATE_CLOSED
);
1826 case STATE_STARTING
:
1827 sp
->rst_counter
[cp
->protoidx
] = sp
->lcp
.max_configure
;
1829 sppp_cp_change_state(cp
, sp
, STATE_REQ_SENT
);
1832 kprintf(SPP_FMT
"%s illegal up in state %s\n",
1833 SPP_ARGS(ifp
), cp
->name
,
1834 sppp_state_name(sp
->state
[cp
->protoidx
]));
1839 sppp_down_event(const struct cp
*cp
, struct sppp
*sp
)
1844 log(LOG_DEBUG
, SPP_FMT
"%s down(%s)\n",
1845 SPP_ARGS(ifp
), cp
->name
,
1846 sppp_state_name(sp
->state
[cp
->protoidx
]));
1848 switch (sp
->state
[cp
->protoidx
]) {
1851 sppp_cp_change_state(cp
, sp
, STATE_INITIAL
);
1854 sppp_cp_change_state(cp
, sp
, STATE_STARTING
);
1857 case STATE_STOPPING
:
1858 case STATE_REQ_SENT
:
1859 case STATE_ACK_RCVD
:
1860 case STATE_ACK_SENT
:
1861 sppp_cp_change_state(cp
, sp
, STATE_STARTING
);
1865 sppp_cp_change_state(cp
, sp
, STATE_STARTING
);
1868 kprintf(SPP_FMT
"%s illegal down in state %s\n",
1869 SPP_ARGS(ifp
), cp
->name
,
1870 sppp_state_name(sp
->state
[cp
->protoidx
]));
1876 sppp_open_event(const struct cp
*cp
, struct sppp
*sp
)
1881 log(LOG_DEBUG
, SPP_FMT
"%s open(%s)\n",
1882 SPP_ARGS(ifp
), cp
->name
,
1883 sppp_state_name(sp
->state
[cp
->protoidx
]));
1885 switch (sp
->state
[cp
->protoidx
]) {
1887 sppp_cp_change_state(cp
, sp
, STATE_STARTING
);
1890 case STATE_STARTING
:
1893 sp
->rst_counter
[cp
->protoidx
] = sp
->lcp
.max_configure
;
1895 sppp_cp_change_state(cp
, sp
, STATE_REQ_SENT
);
1899 * Try escaping stopped state. This seems to bite
1900 * people occasionally, in particular for IPCP,
1901 * presumably following previous IPCP negotiation
1902 * aborts. Somehow, we must have missed a Down event
1903 * which would have caused a transition into starting
1904 * state, so as a bandaid we force the Down event now.
1905 * This effectively implements (something like the)
1906 * `restart' option mentioned in the state transition
1907 * table of RFC 1661.
1909 sppp_cp_change_state(cp
, sp
, STATE_STARTING
);
1912 case STATE_STOPPING
:
1913 case STATE_REQ_SENT
:
1914 case STATE_ACK_RCVD
:
1915 case STATE_ACK_SENT
:
1919 sppp_cp_change_state(cp
, sp
, STATE_STOPPING
);
1926 sppp_close_event(const struct cp
*cp
, struct sppp
*sp
)
1931 log(LOG_DEBUG
, SPP_FMT
"%s close(%s)\n",
1932 SPP_ARGS(ifp
), cp
->name
,
1933 sppp_state_name(sp
->state
[cp
->protoidx
]));
1935 switch (sp
->state
[cp
->protoidx
]) {
1940 case STATE_STARTING
:
1941 sppp_cp_change_state(cp
, sp
, STATE_INITIAL
);
1945 sppp_cp_change_state(cp
, sp
, STATE_CLOSED
);
1947 case STATE_STOPPING
:
1948 sppp_cp_change_state(cp
, sp
, STATE_CLOSING
);
1953 case STATE_REQ_SENT
:
1954 case STATE_ACK_RCVD
:
1955 case STATE_ACK_SENT
:
1956 sp
->rst_counter
[cp
->protoidx
] = sp
->lcp
.max_terminate
;
1957 sppp_cp_send(sp
, cp
->proto
, TERM_REQ
,
1958 ++sp
->pp_seq
[cp
->protoidx
], 0, 0);
1959 sppp_cp_change_state(cp
, sp
, STATE_CLOSING
);
1965 sppp_to_event(const struct cp
*cp
, struct sppp
*sp
)
1972 log(LOG_DEBUG
, SPP_FMT
"%s TO(%s) rst_counter = %d\n",
1973 SPP_ARGS(ifp
), cp
->name
,
1974 sppp_state_name(sp
->state
[cp
->protoidx
]),
1975 sp
->rst_counter
[cp
->protoidx
]);
1977 if (--sp
->rst_counter
[cp
->protoidx
] < 0)
1979 switch (sp
->state
[cp
->protoidx
]) {
1981 sppp_cp_change_state(cp
, sp
, STATE_CLOSED
);
1984 case STATE_STOPPING
:
1985 sppp_cp_change_state(cp
, sp
, STATE_STOPPED
);
1988 case STATE_REQ_SENT
:
1989 case STATE_ACK_RCVD
:
1990 case STATE_ACK_SENT
:
1991 sppp_cp_change_state(cp
, sp
, STATE_STOPPED
);
1997 switch (sp
->state
[cp
->protoidx
]) {
1999 case STATE_STOPPING
:
2000 sppp_cp_send(sp
, cp
->proto
, TERM_REQ
,
2001 ++sp
->pp_seq
[cp
->protoidx
], 0, 0);
2002 callout_reset(&sp
->timeout
[cp
->protoidx
],
2003 sp
->lcp
.timeout
, cp
->TO
, sp
);
2005 case STATE_REQ_SENT
:
2006 case STATE_ACK_RCVD
:
2008 /* sppp_cp_change_state() will restart the timer */
2009 sppp_cp_change_state(cp
, sp
, STATE_REQ_SENT
);
2011 case STATE_ACK_SENT
:
2013 callout_reset(&sp
->timeout
[cp
->protoidx
],
2014 sp
->lcp
.timeout
, cp
->TO
, sp
);
2022 * Change the state of a control protocol in the state automaton.
2023 * Takes care of starting/stopping the restart timer.
2026 sppp_cp_change_state(const struct cp
*cp
, struct sppp
*sp
, int newstate
)
2028 sp
->state
[cp
->protoidx
] = newstate
;
2029 callout_stop(&sp
->timeout
[cp
->protoidx
]);
2033 case STATE_STARTING
:
2039 case STATE_STOPPING
:
2040 case STATE_REQ_SENT
:
2041 case STATE_ACK_RCVD
:
2042 case STATE_ACK_SENT
:
2043 callout_reset(&sp
->timeout
[cp
->protoidx
],
2044 sp
->lcp
.timeout
, cp
->TO
, sp
);
2050 *--------------------------------------------------------------------------*
2052 * The LCP implementation. *
2054 *--------------------------------------------------------------------------*
2057 sppp_lcp_init(struct sppp
*sp
)
2059 sp
->lcp
.opts
= (1 << LCP_OPT_MAGIC
);
2061 sp
->state
[IDX_LCP
] = STATE_INITIAL
;
2062 sp
->fail_counter
[IDX_LCP
] = 0;
2063 sp
->pp_seq
[IDX_LCP
] = 0;
2064 sp
->pp_rseq
[IDX_LCP
] = 0;
2066 sp
->lcp
.mru
= sp
->lcp
.their_mru
= PP_MTU
;
2068 /* Note that these values are relevant for all control protocols */
2069 sp
->lcp
.timeout
= 3 * hz
;
2070 sp
->lcp
.max_terminate
= 2;
2071 sp
->lcp
.max_configure
= 10;
2072 sp
->lcp
.max_failure
= 10;
2073 callout_init(&sp
->timeout
[IDX_LCP
]);
2077 sppp_lcp_up(struct sppp
*sp
)
2081 sp
->pp_alivecnt
= 0;
2082 sp
->lcp
.opts
= (1 << LCP_OPT_MAGIC
);
2085 sp
->lcp
.mru
= sp
->lcp
.their_mru
= PP_MTU
;
2087 * If this interface is passive or dial-on-demand, and we are
2088 * still in Initial state, it means we've got an incoming
2089 * call. Activate the interface.
2091 if ((ifp
->if_flags
& (IFF_AUTO
| IFF_PASSIVE
)) != 0) {
2094 SPP_FMT
"Up event", SPP_ARGS(ifp
));
2095 ifp
->if_flags
|= IFF_RUNNING
;
2096 if (sp
->state
[IDX_LCP
] == STATE_INITIAL
) {
2098 log(-1, "(incoming call)\n");
2099 sp
->pp_flags
|= PP_CALLIN
;
2103 } else if ((ifp
->if_flags
& (IFF_AUTO
| IFF_PASSIVE
)) == 0 &&
2104 (sp
->state
[IDX_LCP
] == STATE_INITIAL
)) {
2105 ifp
->if_flags
|= IFF_RUNNING
;
2109 sppp_up_event(&lcp
, sp
);
2113 sppp_lcp_down(struct sppp
*sp
)
2117 sppp_down_event(&lcp
, sp
);
2120 * If this is neither a dial-on-demand nor a passive
2121 * interface, simulate an ``ifconfig down'' action, so the
2122 * administrator can force a redial by another ``ifconfig
2123 * up''. XXX For leased line operation, should we immediately
2124 * try to reopen the connection here?
2126 if ((ifp
->if_flags
& (IFF_AUTO
| IFF_PASSIVE
)) == 0) {
2128 SPP_FMT
"Down event, taking interface down.\n",
2134 SPP_FMT
"Down event (carrier loss)\n",
2136 sp
->pp_flags
&= ~PP_CALLIN
;
2137 if (sp
->state
[IDX_LCP
] != STATE_INITIAL
)
2139 ifp
->if_flags
&= ~IFF_RUNNING
;
2144 sppp_lcp_open(struct sppp
*sp
)
2147 * If we are authenticator, negotiate LCP_AUTH
2149 if (sp
->hisauth
.proto
!= 0)
2150 sp
->lcp
.opts
|= (1 << LCP_OPT_AUTH_PROTO
);
2152 sp
->lcp
.opts
&= ~(1 << LCP_OPT_AUTH_PROTO
);
2153 sp
->pp_flags
&= ~PP_NEEDAUTH
;
2154 sppp_open_event(&lcp
, sp
);
2158 sppp_lcp_close(struct sppp
*sp
)
2160 sppp_close_event(&lcp
, sp
);
2164 sppp_lcp_TO(void *cookie
)
2166 sppp_to_event(&lcp
, (struct sppp
*)cookie
);
2170 * Analyze a configure request. Return true if it was agreeable, and
2171 * caused action sca, false if it has been rejected or nak'ed, and
2172 * caused action scn. (The return value is used to make the state
2173 * transition decision in the state automaton.)
2176 sppp_lcp_RCR(struct sppp
*sp
, struct lcp_header
*h
, int len
)
2179 u_char
*buf
, *r
, *p
;
2186 buf
= r
= kmalloc (len
, M_TEMP
, M_INTWAIT
);
2189 log(LOG_DEBUG
, SPP_FMT
"lcp parse opts: ",
2192 /* pass 1: check for things that need to be rejected */
2194 for (rlen
=0; len
>1 && p
[1]; len
-=p
[1], p
+=p
[1]) {
2195 /* Sanity check option length */
2197 /* Malicious option - drop immediately.
2198 * XXX Maybe we should just RXJ it?
2200 log(-1, "%s: received malicious LCP option 0x%02x, "
2201 "length 0x%02x, (len: 0x%02x) dropping.\n", ifp
->if_xname
,
2206 log(-1, " %s ", sppp_lcp_opt_name(*p
));
2210 if (len
>= 6 && p
[1] == 6)
2213 log(-1, "[invalid] ");
2215 case LCP_OPT_ASYNC_MAP
:
2216 /* Async control character map. */
2217 if (len
>= 6 && p
[1] == 6)
2220 log(-1, "[invalid] ");
2223 /* Maximum receive unit. */
2224 if (len
>= 4 && p
[1] == 4)
2227 log(-1, "[invalid] ");
2229 case LCP_OPT_AUTH_PROTO
:
2232 log(-1, "[invalid] ");
2235 authproto
= (p
[2] << 8) + p
[3];
2236 if (authproto
== PPP_CHAP
&& p
[1] != 5) {
2238 log(-1, "[invalid chap len] ");
2241 if (sp
->myauth
.proto
== 0) {
2242 /* we are not configured to do auth */
2244 log(-1, "[not configured] ");
2248 * Remote want us to authenticate, remember this,
2249 * so we stay in PHASE_AUTHENTICATE after LCP got
2252 sp
->pp_flags
|= PP_NEEDAUTH
;
2255 /* Others not supported. */
2260 /* Add the option to rejected list. */
2267 log(-1, " send conf-rej\n");
2268 sppp_cp_send (sp
, PPP_LCP
, CONF_REJ
, h
->ident
, rlen
, buf
);
2274 * pass 2: check for option values that are unacceptable and
2275 * thus require to be nak'ed.
2278 log(LOG_DEBUG
, SPP_FMT
"lcp parse opt values: ",
2283 for (rlen
=0; len
>1 && p
[1]; len
-=p
[1], p
+=p
[1]) {
2285 log(-1, " %s ", sppp_lcp_opt_name(*p
));
2288 /* Magic number -- extract. */
2289 nmagic
= (u_long
)p
[2] << 24 |
2290 (u_long
)p
[3] << 16 | p
[4] << 8 | p
[5];
2291 if (nmagic
!= sp
->lcp
.magic
) {
2294 log(-1, "0x%lx ", nmagic
);
2297 if (debug
&& sp
->pp_loopcnt
< MAXALIVECNT
*5)
2298 log(-1, "[glitch] ");
2301 * We negate our magic here, and NAK it. If
2302 * we see it later in an NAK packet, we
2303 * suggest a new one.
2305 nmagic
= ~sp
->lcp
.magic
;
2307 p
[2] = nmagic
>> 24;
2308 p
[3] = nmagic
>> 16;
2313 case LCP_OPT_ASYNC_MAP
:
2315 * Async control character map -- just ignore it.
2317 * Quote from RFC 1662, chapter 6:
2318 * To enable this functionality, synchronous PPP
2319 * implementations MUST always respond to the
2320 * Async-Control-Character-Map Configuration
2321 * Option with the LCP Configure-Ack. However,
2322 * acceptance of the Configuration Option does
2323 * not imply that the synchronous implementation
2324 * will do any ACCM mapping. Instead, all such
2325 * octet mapping will be performed by the
2326 * asynchronous-to-synchronous converter.
2332 * Maximum receive unit. Always agreeable,
2333 * but ignored by now.
2335 sp
->lcp
.their_mru
= p
[2] * 256 + p
[3];
2337 log(-1, "%lu ", sp
->lcp
.their_mru
);
2340 case LCP_OPT_AUTH_PROTO
:
2341 authproto
= (p
[2] << 8) + p
[3];
2342 if (sp
->myauth
.proto
!= authproto
) {
2343 /* not agreed, nak */
2345 log(-1, "[mine %s != his %s] ",
2346 sppp_proto_name(sp
->hisauth
.proto
),
2347 sppp_proto_name(authproto
));
2348 p
[2] = sp
->myauth
.proto
>> 8;
2349 p
[3] = sp
->myauth
.proto
;
2352 if (authproto
== PPP_CHAP
&& p
[4] != CHAP_MD5
) {
2354 log(-1, "[chap not MD5] ");
2360 /* Add the option to nak'ed list. */
2367 * Local and remote magics equal -- loopback?
2369 if (sp
->pp_loopcnt
>= MAXALIVECNT
*5) {
2370 if (sp
->pp_loopcnt
== MAXALIVECNT
*5)
2371 kprintf (SPP_FMT
"loopback\n",
2373 if (ifp
->if_flags
& IFF_UP
) {
2375 IF_DRAIN(&sp
->pp_cpq
);
2380 } else if (++sp
->fail_counter
[IDX_LCP
] >= sp
->lcp
.max_failure
) {
2382 log(-1, " max_failure (%d) exceeded, "
2384 sp
->lcp
.max_failure
);
2385 sppp_cp_send(sp
, PPP_LCP
, CONF_REJ
, h
->ident
, rlen
, buf
);
2388 log(-1, " send conf-nak\n");
2389 sppp_cp_send (sp
, PPP_LCP
, CONF_NAK
, h
->ident
, rlen
, buf
);
2393 log(-1, " send conf-ack\n");
2394 sp
->fail_counter
[IDX_LCP
] = 0;
2396 sppp_cp_send (sp
, PPP_LCP
, CONF_ACK
,
2397 h
->ident
, origlen
, h
+1);
2400 kfree (buf
, M_TEMP
);
2409 * Analyze the LCP Configure-Reject option list, and adjust our
2413 sppp_lcp_RCN_rej(struct sppp
*sp
, struct lcp_header
*h
, int len
)
2419 buf
= kmalloc (len
, M_TEMP
, M_INTWAIT
);
2422 log(LOG_DEBUG
, SPP_FMT
"lcp rej opts: ",
2426 for (; len
> 1 && p
[1]; len
-= p
[1], p
+= p
[1]) {
2427 /* Sanity check option length */
2430 * Malicious option - drop immediately.
2431 * XXX Maybe we should just RXJ it?
2433 log(-1, "%s: received malicious LCP option, "
2434 "dropping.\n", ifp
->if_xname
);
2438 log(-1, " %s ", sppp_lcp_opt_name(*p
));
2441 /* Magic number -- can't use it, use 0 */
2442 sp
->lcp
.opts
&= ~(1 << LCP_OPT_MAGIC
);
2447 * Should not be rejected anyway, since we only
2448 * negotiate a MRU if explicitly requested by
2451 sp
->lcp
.opts
&= ~(1 << LCP_OPT_MRU
);
2453 case LCP_OPT_AUTH_PROTO
:
2455 * Peer doesn't want to authenticate himself,
2456 * deny unless this is a dialout call, and
2457 * AUTHFLAG_NOCALLOUT is set.
2459 if ((sp
->pp_flags
& PP_CALLIN
) == 0 &&
2460 (sp
->hisauth
.flags
& AUTHFLAG_NOCALLOUT
) != 0) {
2462 log(-1, "[don't insist on auth "
2464 sp
->lcp
.opts
&= ~(1 << LCP_OPT_AUTH_PROTO
);
2468 log(-1, "[access denied]\n");
2476 kfree (buf
, M_TEMP
);
2481 * Analyze the LCP Configure-NAK option list, and adjust our
2485 sppp_lcp_RCN_nak(struct sppp
*sp
, struct lcp_header
*h
, int len
)
2492 buf
= kmalloc (len
, M_TEMP
, M_INTWAIT
);
2495 log(LOG_DEBUG
, SPP_FMT
"lcp nak opts: ",
2499 for (; len
> 1 && p
[1]; len
-= p
[1], p
+= p
[1]) {
2500 /* Sanity check option length */
2503 * Malicious option - drop immediately.
2504 * XXX Maybe we should just RXJ it?
2506 log(-1, "%s: received malicious LCP option, "
2507 "dropping.\n", ifp
->if_xname
);
2511 log(-1, " %s ", sppp_lcp_opt_name(*p
));
2514 /* Magic number -- renegotiate */
2515 if ((sp
->lcp
.opts
& (1 << LCP_OPT_MAGIC
)) &&
2516 len
>= 6 && p
[1] == 6) {
2517 magic
= (u_long
)p
[2] << 24 |
2518 (u_long
)p
[3] << 16 | p
[4] << 8 | p
[5];
2520 * If the remote magic is our negated one,
2521 * this looks like a loopback problem.
2522 * Suggest a new magic to make sure.
2524 if (magic
== ~sp
->lcp
.magic
) {
2526 log(-1, "magic glitch ");
2527 sp
->lcp
.magic
= krandom();
2529 sp
->lcp
.magic
= magic
;
2531 log(-1, "%lu ", magic
);
2537 * Peer wants to advise us to negotiate an MRU.
2538 * Agree on it if it's reasonable, or use
2539 * default otherwise.
2541 if (len
>= 4 && p
[1] == 4) {
2542 u_int mru
= p
[2] * 256 + p
[3];
2544 log(-1, "%d ", mru
);
2545 if (mru
< PP_MTU
|| mru
> PP_MAX_MRU
)
2548 sp
->lcp
.opts
|= (1 << LCP_OPT_MRU
);
2551 case LCP_OPT_AUTH_PROTO
:
2553 * Peer doesn't like our authentication method,
2557 log(-1, "[access denied]\n");
2565 kfree (buf
, M_TEMP
);
2570 sppp_lcp_tlu(struct sppp
*sp
)
2577 if (! (ifp
->if_flags
& IFF_UP
) &&
2578 (ifp
->if_flags
& IFF_RUNNING
)) {
2579 /* Coming out of loopback mode. */
2581 kprintf (SPP_FMT
"up\n", SPP_ARGS(ifp
));
2584 for (i
= 0; i
< IDX_COUNT
; i
++)
2585 if ((cps
[i
])->flags
& CP_QUAL
)
2588 if ((sp
->lcp
.opts
& (1 << LCP_OPT_AUTH_PROTO
)) != 0 ||
2589 (sp
->pp_flags
& PP_NEEDAUTH
) != 0)
2590 sp
->pp_phase
= PHASE_AUTHENTICATE
;
2592 sp
->pp_phase
= PHASE_NETWORK
;
2595 log(LOG_DEBUG
, SPP_FMT
"phase %s\n", SPP_ARGS(ifp
),
2596 sppp_phase_name(sp
->pp_phase
));
2599 * Open all authentication protocols. This is even required
2600 * if we already proceeded to network phase, since it might be
2601 * that remote wants us to authenticate, so we might have to
2602 * send a PAP request. Undesired authentication protocols
2603 * don't do anything when they get an Open event.
2605 for (i
= 0; i
< IDX_COUNT
; i
++)
2606 if ((cps
[i
])->flags
& CP_AUTH
)
2609 if (sp
->pp_phase
== PHASE_NETWORK
) {
2610 /* Notify all NCPs. */
2611 for (i
= 0; i
< IDX_COUNT
; i
++)
2612 if (((cps
[i
])->flags
& CP_NCP
) &&
2615 * Hack to administratively disable IPv6 if
2616 * not desired. Perhaps we should have another
2617 * flag for this, but right now, we can make
2618 * all struct cp's read/only.
2620 (cps
[i
] != &ipv6cp
||
2621 (sp
->confflags
& CONF_ENABLE_IPV6
)))
2625 /* Send Up events to all started protos. */
2626 for (i
= 0, mask
= 1; i
< IDX_COUNT
; i
++, mask
<<= 1)
2627 if ((sp
->lcp
.protos
& mask
) && ((cps
[i
])->flags
& CP_LCP
) == 0)
2630 /* notify low-level driver of state change */
2632 sp
->pp_chg(sp
, (int)sp
->pp_phase
);
2634 if (sp
->pp_phase
== PHASE_NETWORK
)
2635 /* if no NCP is starting, close down */
2636 sppp_lcp_check_and_close(sp
);
2640 sppp_lcp_tld(struct sppp
*sp
)
2646 sp
->pp_phase
= PHASE_TERMINATE
;
2649 log(LOG_DEBUG
, SPP_FMT
"phase %s\n", SPP_ARGS(ifp
),
2650 sppp_phase_name(sp
->pp_phase
));
2653 * Take upper layers down. We send the Down event first and
2654 * the Close second to prevent the upper layers from sending
2655 * ``a flurry of terminate-request packets'', as the RFC
2658 for (i
= 0, mask
= 1; i
< IDX_COUNT
; i
++, mask
<<= 1)
2659 if ((sp
->lcp
.protos
& mask
) && ((cps
[i
])->flags
& CP_LCP
) == 0) {
2661 (cps
[i
])->Close(sp
);
2666 sppp_lcp_tls(struct sppp
*sp
)
2670 sp
->pp_phase
= PHASE_ESTABLISH
;
2673 log(LOG_DEBUG
, SPP_FMT
"phase %s\n", SPP_ARGS(ifp
),
2674 sppp_phase_name(sp
->pp_phase
));
2676 /* Notify lower layer if desired. */
2684 sppp_lcp_tlf(struct sppp
*sp
)
2688 sp
->pp_phase
= PHASE_DEAD
;
2690 log(LOG_DEBUG
, SPP_FMT
"phase %s\n", SPP_ARGS(ifp
),
2691 sppp_phase_name(sp
->pp_phase
));
2693 /* Notify lower layer if desired. */
2701 sppp_lcp_scr(struct sppp
*sp
)
2703 char opt
[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */];
2707 if (sp
->lcp
.opts
& (1 << LCP_OPT_MAGIC
)) {
2708 if (! sp
->lcp
.magic
)
2709 sp
->lcp
.magic
= krandom();
2710 opt
[i
++] = LCP_OPT_MAGIC
;
2712 opt
[i
++] = sp
->lcp
.magic
>> 24;
2713 opt
[i
++] = sp
->lcp
.magic
>> 16;
2714 opt
[i
++] = sp
->lcp
.magic
>> 8;
2715 opt
[i
++] = sp
->lcp
.magic
;
2718 if (sp
->lcp
.opts
& (1 << LCP_OPT_MRU
)) {
2719 opt
[i
++] = LCP_OPT_MRU
;
2721 opt
[i
++] = sp
->lcp
.mru
>> 8;
2722 opt
[i
++] = sp
->lcp
.mru
;
2725 if (sp
->lcp
.opts
& (1 << LCP_OPT_AUTH_PROTO
)) {
2726 authproto
= sp
->hisauth
.proto
;
2727 opt
[i
++] = LCP_OPT_AUTH_PROTO
;
2728 opt
[i
++] = authproto
== PPP_CHAP
? 5: 4;
2729 opt
[i
++] = authproto
>> 8;
2730 opt
[i
++] = authproto
;
2731 if (authproto
== PPP_CHAP
)
2732 opt
[i
++] = CHAP_MD5
;
2735 sp
->confid
[IDX_LCP
] = ++sp
->pp_seq
[IDX_LCP
];
2736 sppp_cp_send (sp
, PPP_LCP
, CONF_REQ
, sp
->confid
[IDX_LCP
], i
, &opt
);
2740 * Check the open NCPs, return true if at least one NCP is open.
2743 sppp_ncp_check(struct sppp
*sp
)
2747 for (i
= 0, mask
= 1; i
< IDX_COUNT
; i
++, mask
<<= 1)
2748 if ((sp
->lcp
.protos
& mask
) && (cps
[i
])->flags
& CP_NCP
)
2754 * Re-check the open NCPs and see if we should terminate the link.
2755 * Called by the NCPs during their tlf action handling.
2758 sppp_lcp_check_and_close(struct sppp
*sp
)
2761 if (sp
->pp_phase
< PHASE_NETWORK
)
2762 /* don't bother, we are already going down */
2765 if (sppp_ncp_check(sp
))
2772 *--------------------------------------------------------------------------*
2774 * The IPCP implementation. *
2776 *--------------------------------------------------------------------------*
2780 sppp_ipcp_init(struct sppp
*sp
)
2784 sp
->state
[IDX_IPCP
] = STATE_INITIAL
;
2785 sp
->fail_counter
[IDX_IPCP
] = 0;
2786 sp
->pp_seq
[IDX_IPCP
] = 0;
2787 sp
->pp_rseq
[IDX_IPCP
] = 0;
2788 callout_init(&sp
->timeout
[IDX_IPCP
]);
2792 sppp_ipcp_up(struct sppp
*sp
)
2794 sppp_up_event(&ipcp
, sp
);
2798 sppp_ipcp_down(struct sppp
*sp
)
2800 sppp_down_event(&ipcp
, sp
);
2804 sppp_ipcp_open(struct sppp
*sp
)
2807 u_long myaddr
, hisaddr
;
2809 sp
->ipcp
.flags
&= ~(IPCP_HISADDR_SEEN
| IPCP_MYADDR_SEEN
|
2810 IPCP_MYADDR_DYN
| IPCP_VJ
);
2813 sppp_get_ip_addrs(sp
, &myaddr
, &hisaddr
, 0);
2815 * If we don't have his address, this probably means our
2816 * interface doesn't want to talk IP at all. (This could
2817 * be the case if somebody wants to speak only IPX, for
2818 * example.) Don't open IPCP in this case.
2820 if (hisaddr
== 0L) {
2821 /* XXX this message should go away */
2823 log(LOG_DEBUG
, SPP_FMT
"ipcp_open(): no IP interface\n",
2829 * I don't have an assigned address, so i need to
2830 * negotiate my address.
2832 sp
->ipcp
.flags
|= IPCP_MYADDR_DYN
;
2833 sp
->ipcp
.opts
|= (1 << IPCP_OPT_ADDRESS
);
2835 sp
->ipcp
.flags
|= IPCP_MYADDR_SEEN
;
2836 if (sp
->confflags
& CONF_ENABLE_VJ
) {
2837 sp
->ipcp
.opts
|= (1 << IPCP_OPT_COMPRESSION
);
2838 sp
->ipcp
.max_state
= MAX_STATES
- 1;
2839 sp
->ipcp
.compress_cid
= 1;
2841 sppp_open_event(&ipcp
, sp
);
2845 sppp_ipcp_close(struct sppp
*sp
)
2847 sppp_close_event(&ipcp
, sp
);
2848 if (sp
->ipcp
.flags
& IPCP_MYADDR_DYN
)
2850 * My address was dynamic, clear it again.
2852 sppp_set_ip_addr(sp
, 0L);
2856 sppp_ipcp_TO(void *cookie
)
2858 sppp_to_event(&ipcp
, (struct sppp
*)cookie
);
2862 * Analyze a configure request. Return true if it was agreeable, and
2863 * caused action sca, false if it has been rejected or nak'ed, and
2864 * caused action scn. (The return value is used to make the state
2865 * transition decision in the state automaton.)
2868 sppp_ipcp_RCR(struct sppp
*sp
, struct lcp_header
*h
, int len
)
2870 u_char
*buf
, *r
, *p
;
2871 struct ifnet
*ifp
= &sp
->pp_if
;
2872 int rlen
, origlen
, debug
= ifp
->if_flags
& IFF_DEBUG
;
2873 u_long hisaddr
, desiredaddr
;
2880 * Make sure to allocate a buf that can at least hold a
2881 * conf-nak with an `address' option. We might need it below.
2883 buf
= r
= kmalloc ((len
< 6? 6: len
), M_TEMP
, M_INTWAIT
);
2885 /* pass 1: see if we can recognize them */
2887 log(LOG_DEBUG
, SPP_FMT
"ipcp parse opts: ",
2890 for (rlen
=0; len
>1 && p
[1]; len
-=p
[1], p
+=p
[1]) {
2891 /* Sanity check option length */
2893 /* XXX should we just RXJ? */
2894 log(-1, "%s: malicious IPCP option received, dropping\n",
2899 log(-1, " %s ", sppp_ipcp_opt_name(*p
));
2901 case IPCP_OPT_COMPRESSION
:
2902 if (!(sp
->confflags
& CONF_ENABLE_VJ
)) {
2903 /* VJ compression administratively disabled */
2905 log(-1, "[locally disabled] ");
2909 * In theory, we should only conf-rej an
2910 * option that is shorter than RFC 1618
2911 * requires (i.e. < 4), and should conf-nak
2912 * anything else that is not VJ. However,
2913 * since our algorithm always uses the
2914 * original option to NAK it with new values,
2915 * things would become more complicated. In
2916 * pratice, the only commonly implemented IP
2917 * compression option is VJ anyway, so the
2918 * difference is negligible.
2920 if (len
>= 6 && p
[1] == 6) {
2922 * correctly formed compression option
2923 * that could be VJ compression
2928 log(-1, "optlen %d [invalid/unsupported] ",
2931 case IPCP_OPT_ADDRESS
:
2932 if (len
>= 6 && p
[1] == 6) {
2933 /* correctly formed address option */
2937 log(-1, "[invalid] ");
2940 /* Others not supported. */
2945 /* Add the option to rejected list. */
2952 log(-1, " send conf-rej\n");
2953 sppp_cp_send (sp
, PPP_IPCP
, CONF_REJ
, h
->ident
, rlen
, buf
);
2958 /* pass 2: parse option values */
2959 sppp_get_ip_addrs(sp
, 0, &hisaddr
, 0);
2961 log(LOG_DEBUG
, SPP_FMT
"ipcp parse opt values: ",
2965 for (rlen
=0; len
>1 && p
[1]; len
-=p
[1], p
+=p
[1]) {
2967 log(-1, " %s ", sppp_ipcp_opt_name(*p
));
2969 case IPCP_OPT_COMPRESSION
:
2970 desiredcomp
= p
[2] << 8 | p
[3];
2971 /* We only support VJ */
2972 if (desiredcomp
== IPCP_COMP_VJ
) {
2974 log(-1, "VJ [ack] ");
2975 sp
->ipcp
.flags
|= IPCP_VJ
;
2976 sl_compress_init(sp
->pp_comp
, p
[4]);
2977 sp
->ipcp
.max_state
= p
[4];
2978 sp
->ipcp
.compress_cid
= p
[5];
2982 log(-1, "compproto %#04x [not supported] ",
2984 p
[2] = IPCP_COMP_VJ
>> 8;
2985 p
[3] = IPCP_COMP_VJ
;
2986 p
[4] = sp
->ipcp
.max_state
;
2987 p
[5] = sp
->ipcp
.compress_cid
;
2989 case IPCP_OPT_ADDRESS
:
2990 /* This is the address he wants in his end */
2991 desiredaddr
= p
[2] << 24 | p
[3] << 16 |
2993 if (desiredaddr
== hisaddr
||
2994 (hisaddr
>= 1 && hisaddr
<= 254 && desiredaddr
!= 0)) {
2996 * Peer's address is same as our value,
2997 * or we have set it to 0.0.0.* to
2998 * indicate that we do not really care,
2999 * this is agreeable. Gonna conf-ack
3003 log(-1, "%s [ack] ",
3004 sppp_dotted_quad(hisaddr
));
3005 /* record that we've seen it already */
3006 sp
->ipcp
.flags
|= IPCP_HISADDR_SEEN
;
3010 * The address wasn't agreeable. This is either
3011 * he sent us 0.0.0.0, asking to assign him an
3012 * address, or he send us another address not
3013 * matching our value. Either case, we gonna
3014 * conf-nak it with our value.
3015 * XXX: we should "rej" if hisaddr == 0
3018 if (desiredaddr
== 0)
3019 log(-1, "[addr requested] ");
3021 log(-1, "%s [not agreed] ",
3022 sppp_dotted_quad(desiredaddr
));
3025 p
[2] = hisaddr
>> 24;
3026 p
[3] = hisaddr
>> 16;
3027 p
[4] = hisaddr
>> 8;
3031 /* Add the option to nak'ed list. */
3038 * If we are about to conf-ack the request, but haven't seen
3039 * his address so far, gonna conf-nak it instead, with the
3040 * `address' option present and our idea of his address being
3041 * filled in there, to request negotiation of both addresses.
3043 * XXX This can result in an endless req - nak loop if peer
3044 * doesn't want to send us his address. Q: What should we do
3045 * about it? XXX A: implement the max-failure counter.
3047 if (rlen
== 0 && !(sp
->ipcp
.flags
& IPCP_HISADDR_SEEN
) && !gotmyaddr
) {
3048 buf
[0] = IPCP_OPT_ADDRESS
;
3050 buf
[2] = hisaddr
>> 24;
3051 buf
[3] = hisaddr
>> 16;
3052 buf
[4] = hisaddr
>> 8;
3056 log(-1, "still need hisaddr ");
3061 log(-1, " send conf-nak\n");
3062 sppp_cp_send (sp
, PPP_IPCP
, CONF_NAK
, h
->ident
, rlen
, buf
);
3065 log(-1, " send conf-ack\n");
3066 sppp_cp_send (sp
, PPP_IPCP
, CONF_ACK
,
3067 h
->ident
, origlen
, h
+1);
3070 kfree (buf
, M_TEMP
);
3079 * Analyze the IPCP Configure-Reject option list, and adjust our
3083 sppp_ipcp_RCN_rej(struct sppp
*sp
, struct lcp_header
*h
, int len
)
3086 struct ifnet
*ifp
= &sp
->pp_if
;
3087 int debug
= ifp
->if_flags
& IFF_DEBUG
;
3090 buf
= kmalloc (len
, M_TEMP
, M_INTWAIT
);
3093 log(LOG_DEBUG
, SPP_FMT
"ipcp rej opts: ",
3097 for (; len
> 1 && p
[1]; len
-= p
[1], p
+= p
[1]) {
3098 /* Sanity check option length */
3100 /* XXX should we just RXJ? */
3101 log(-1, "%s: malicious IPCP option received, dropping\n",
3106 log(-1, " %s ", sppp_ipcp_opt_name(*p
));
3108 case IPCP_OPT_COMPRESSION
:
3109 sp
->ipcp
.opts
&= ~(1 << IPCP_OPT_COMPRESSION
);
3111 case IPCP_OPT_ADDRESS
:
3113 * Peer doesn't grok address option. This is
3114 * bad. XXX Should we better give up here?
3115 * XXX We could try old "addresses" option...
3117 sp
->ipcp
.opts
&= ~(1 << IPCP_OPT_ADDRESS
);
3124 kfree (buf
, M_TEMP
);
3129 * Analyze the IPCP Configure-NAK option list, and adjust our
3133 sppp_ipcp_RCN_nak(struct sppp
*sp
, struct lcp_header
*h
, int len
)
3136 struct ifnet
*ifp
= &sp
->pp_if
;
3137 int debug
= ifp
->if_flags
& IFF_DEBUG
;
3142 buf
= kmalloc (len
, M_TEMP
, M_INTWAIT
);
3145 log(LOG_DEBUG
, SPP_FMT
"ipcp nak opts: ",
3149 for (; len
> 1 && p
[1]; len
-= p
[1], p
+= p
[1]) {
3150 /* Sanity check option length */
3152 /* XXX should we just RXJ? */
3153 log(-1, "%s: malicious IPCP option received, dropping\n",
3158 log(-1, " %s ", sppp_ipcp_opt_name(*p
));
3160 case IPCP_OPT_COMPRESSION
:
3161 if (len
>= 6 && p
[1] == 6) {
3162 desiredcomp
= p
[2] << 8 | p
[3];
3164 log(-1, "[wantcomp %#04x] ",
3166 if (desiredcomp
== IPCP_COMP_VJ
) {
3167 sl_compress_init(sp
->pp_comp
, p
[4]);
3168 sp
->ipcp
.max_state
= p
[4];
3169 sp
->ipcp
.compress_cid
= p
[5];
3171 log(-1, "[agree] ");
3174 ~(1 << IPCP_OPT_COMPRESSION
);
3177 case IPCP_OPT_ADDRESS
:
3179 * Peer doesn't like our local IP address. See
3180 * if we can do something for him. We'll drop
3181 * him our address then.
3183 if (len
>= 6 && p
[1] == 6) {
3184 wantaddr
= p
[2] << 24 | p
[3] << 16 |
3186 sp
->ipcp
.opts
|= (1 << IPCP_OPT_ADDRESS
);
3188 log(-1, "[wantaddr %s] ",
3189 sppp_dotted_quad(wantaddr
));
3191 * When doing dynamic address assignment,
3192 * we accept his offer. Otherwise, we
3193 * ignore it and thus continue to negotiate
3194 * our already existing value.
3195 * XXX: Bogus, if he said no once, he'll
3196 * just say no again, might as well die.
3198 if (sp
->ipcp
.flags
& IPCP_MYADDR_DYN
) {
3199 sppp_set_ip_addr(sp
, wantaddr
);
3201 log(-1, "[agree] ");
3202 sp
->ipcp
.flags
|= IPCP_MYADDR_SEEN
;
3210 kfree (buf
, M_TEMP
);
3215 sppp_ipcp_tlu(struct sppp
*sp
)
3217 /* we are up - notify isdn daemon */
3223 sppp_ipcp_tld(struct sppp
*sp
)
3228 sppp_ipcp_tls(struct sppp
*sp
)
3230 /* indicate to LCP that it must stay alive */
3231 sp
->lcp
.protos
|= (1 << IDX_IPCP
);
3235 sppp_ipcp_tlf(struct sppp
*sp
)
3237 /* we no longer need LCP */
3238 sp
->lcp
.protos
&= ~(1 << IDX_IPCP
);
3239 sppp_lcp_check_and_close(sp
);
3243 sppp_ipcp_scr(struct sppp
*sp
)
3245 char opt
[6 /* compression */ + 6 /* address */];
3249 if (sp
->ipcp
.opts
& (1 << IPCP_OPT_COMPRESSION
)) {
3250 opt
[i
++] = IPCP_OPT_COMPRESSION
;
3252 opt
[i
++] = IPCP_COMP_VJ
>> 8;
3253 opt
[i
++] = IPCP_COMP_VJ
;
3254 opt
[i
++] = sp
->ipcp
.max_state
;
3255 opt
[i
++] = sp
->ipcp
.compress_cid
;
3257 if (sp
->ipcp
.opts
& (1 << IPCP_OPT_ADDRESS
)) {
3258 sppp_get_ip_addrs(sp
, &ouraddr
, 0, 0);
3259 opt
[i
++] = IPCP_OPT_ADDRESS
;
3261 opt
[i
++] = ouraddr
>> 24;
3262 opt
[i
++] = ouraddr
>> 16;
3263 opt
[i
++] = ouraddr
>> 8;
3267 sp
->confid
[IDX_IPCP
] = ++sp
->pp_seq
[IDX_IPCP
];
3268 sppp_cp_send(sp
, PPP_IPCP
, CONF_REQ
, sp
->confid
[IDX_IPCP
], i
, &opt
);
3272 *--------------------------------------------------------------------------*
3274 * The IPv6CP implementation. *
3276 *--------------------------------------------------------------------------*
3281 sppp_ipv6cp_init(struct sppp
*sp
)
3283 sp
->ipv6cp
.opts
= 0;
3284 sp
->ipv6cp
.flags
= 0;
3285 sp
->state
[IDX_IPV6CP
] = STATE_INITIAL
;
3286 sp
->fail_counter
[IDX_IPV6CP
] = 0;
3287 sp
->pp_seq
[IDX_IPV6CP
] = 0;
3288 sp
->pp_rseq
[IDX_IPV6CP
] = 0;
3289 callout_init(&sp
->timeout
[IDX_IPV6CP
]);
3293 sppp_ipv6cp_up(struct sppp
*sp
)
3295 sppp_up_event(&ipv6cp
, sp
);
3299 sppp_ipv6cp_down(struct sppp
*sp
)
3301 sppp_down_event(&ipv6cp
, sp
);
3305 sppp_ipv6cp_open(struct sppp
*sp
)
3308 struct in6_addr myaddr
, hisaddr
;
3310 #ifdef IPV6CP_MYIFID_DYN
3311 sp
->ipv6cp
.flags
&= ~(IPV6CP_MYIFID_SEEN
|IPV6CP_MYIFID_DYN
);
3313 sp
->ipv6cp
.flags
&= ~IPV6CP_MYIFID_SEEN
;
3316 sppp_get_ip6_addrs(sp
, &myaddr
, &hisaddr
, 0);
3318 * If we don't have our address, this probably means our
3319 * interface doesn't want to talk IPv6 at all. (This could
3320 * be the case if somebody wants to speak only IPX, for
3321 * example.) Don't open IPv6CP in this case.
3323 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr
)) {
3324 /* XXX this message should go away */
3326 log(LOG_DEBUG
, SPP_FMT
"ipv6cp_open(): no IPv6 interface\n",
3331 sp
->ipv6cp
.flags
|= IPV6CP_MYIFID_SEEN
;
3332 sp
->ipv6cp
.opts
|= (1 << IPV6CP_OPT_IFID
);
3333 sppp_open_event(&ipv6cp
, sp
);
3337 sppp_ipv6cp_close(struct sppp
*sp
)
3339 sppp_close_event(&ipv6cp
, sp
);
3343 sppp_ipv6cp_TO(void *cookie
)
3345 sppp_to_event(&ipv6cp
, (struct sppp
*)cookie
);
3349 * Analyze a configure request. Return true if it was agreeable, and
3350 * caused action sca, false if it has been rejected or nak'ed, and
3351 * caused action scn. (The return value is used to make the state
3352 * transition decision in the state automaton.)
3355 sppp_ipv6cp_RCR(struct sppp
*sp
, struct lcp_header
*h
, int len
)
3357 u_char
*buf
, *r
, *p
;
3358 struct ifnet
*ifp
= &sp
->pp_if
;
3359 int rlen
, origlen
, debug
= ifp
->if_flags
& IFF_DEBUG
;
3360 struct in6_addr myaddr
, desiredaddr
, suggestaddr
;
3363 int collision
, nohisaddr
;
3368 * Make sure to allocate a buf that can at least hold a
3369 * conf-nak with an `address' option. We might need it below.
3371 buf
= r
= kmalloc ((len
< 6? 6: len
), M_TEMP
, M_INTWAIT
);
3373 /* pass 1: see if we can recognize them */
3375 log(LOG_DEBUG
, SPP_FMT
"ipv6cp parse opts:",
3379 for (rlen
=0; len
>1 && p
[1]; len
-=p
[1], p
+=p
[1]) {
3380 /* Sanity check option length */
3383 log(-1, "%s: received malicious IPCPv6 option, "
3384 "dropping\n", ifp
->if_xname
);
3388 log(-1, " %s", sppp_ipv6cp_opt_name(*p
));
3390 case IPV6CP_OPT_IFID
:
3391 if (len
>= 10 && p
[1] == 10 && ifidcount
== 0) {
3392 /* correctly formed address option */
3397 log(-1, " [invalid]");
3400 case IPV6CP_OPT_COMPRESSION
:
3401 if (len
>= 4 && p
[1] >= 4) {
3402 /* correctly formed compress option */
3406 log(-1, " [invalid]");
3410 /* Others not supported. */
3415 /* Add the option to rejected list. */
3422 log(-1, " send conf-rej\n");
3423 sppp_cp_send (sp
, PPP_IPV6CP
, CONF_REJ
, h
->ident
, rlen
, buf
);
3428 /* pass 2: parse option values */
3429 sppp_get_ip6_addrs(sp
, &myaddr
, 0, 0);
3431 log(LOG_DEBUG
, SPP_FMT
"ipv6cp parse opt values: ",
3436 for (rlen
=0; len
>1 && p
[1]; len
-=p
[1], p
+=p
[1]) {
3438 log(-1, " %s", sppp_ipv6cp_opt_name(*p
));
3441 case IPV6CP_OPT_COMPRESSION
:
3444 case IPV6CP_OPT_IFID
:
3445 bzero(&desiredaddr
, sizeof(desiredaddr
));
3446 bcopy(&p
[2], &desiredaddr
.s6_addr
[8], 8);
3447 collision
= (bcmp(&desiredaddr
.s6_addr
[8],
3448 &myaddr
.s6_addr
[8], 8) == 0);
3449 nohisaddr
= IN6_IS_ADDR_UNSPECIFIED(&desiredaddr
);
3451 desiredaddr
.s6_addr16
[0] = htons(0xfe80);
3452 desiredaddr
.s6_addr16
[1] = htons(sp
->pp_if
.if_index
);
3454 if (!collision
&& !nohisaddr
) {
3455 /* no collision, hisaddr known - Conf-Ack */
3460 ip6_sprintf(&desiredaddr
),
3461 sppp_cp_type_name(type
));
3466 bzero(&suggestaddr
, sizeof(suggestaddr
));
3467 if (collision
&& nohisaddr
) {
3468 /* collision, hisaddr unknown - Conf-Rej */
3473 * - no collision, hisaddr unknown, or
3474 * - collision, hisaddr known
3475 * Conf-Nak, suggest hisaddr
3478 sppp_suggest_ip6_addr(sp
, &suggestaddr
);
3479 bcopy(&suggestaddr
.s6_addr
[8], &p
[2], 8);
3482 log(-1, " %s [%s]", ip6_sprintf(&desiredaddr
),
3483 sppp_cp_type_name(type
));
3486 /* Add the option to nak'ed list. */
3492 if (rlen
== 0 && type
== CONF_ACK
) {
3494 log(-1, " send %s\n", sppp_cp_type_name(type
));
3495 sppp_cp_send (sp
, PPP_IPV6CP
, type
, h
->ident
, origlen
, h
+1);
3498 if (type
== CONF_ACK
)
3499 panic("IPv6CP RCR: CONF_ACK with non-zero rlen");
3503 log(-1, " send %s suggest %s\n",
3504 sppp_cp_type_name(type
), ip6_sprintf(&suggestaddr
));
3506 sppp_cp_send (sp
, PPP_IPV6CP
, type
, h
->ident
, rlen
, buf
);
3510 kfree (buf
, M_TEMP
);
3519 * Analyze the IPv6CP Configure-Reject option list, and adjust our
3523 sppp_ipv6cp_RCN_rej(struct sppp
*sp
, struct lcp_header
*h
, int len
)
3526 struct ifnet
*ifp
= &sp
->pp_if
;
3527 int debug
= ifp
->if_flags
& IFF_DEBUG
;
3530 buf
= kmalloc (len
, M_TEMP
, M_INTWAIT
);
3533 log(LOG_DEBUG
, SPP_FMT
"ipv6cp rej opts:",
3537 for (; len
> 1 && p
[1]; len
-= p
[1], p
+= p
[1]) {
3540 log(-1, "%s: received malicious IPCPv6 option, "
3541 "dropping\n", ifp
->if_xname
);
3545 log(-1, " %s", sppp_ipv6cp_opt_name(*p
));
3547 case IPV6CP_OPT_IFID
:
3549 * Peer doesn't grok address option. This is
3550 * bad. XXX Should we better give up here?
3552 sp
->ipv6cp
.opts
&= ~(1 << IPV6CP_OPT_IFID
);
3555 case IPV6CP_OPT_COMPRESS
:
3556 sp
->ipv6cp
.opts
&= ~(1 << IPV6CP_OPT_COMPRESS
);
3564 kfree (buf
, M_TEMP
);
3569 * Analyze the IPv6CP Configure-NAK option list, and adjust our
3573 sppp_ipv6cp_RCN_nak(struct sppp
*sp
, struct lcp_header
*h
, int len
)
3576 struct ifnet
*ifp
= &sp
->pp_if
;
3577 int debug
= ifp
->if_flags
& IFF_DEBUG
;
3578 struct in6_addr suggestaddr
;
3581 buf
= kmalloc (len
, M_TEMP
, M_INTWAIT
);
3584 log(LOG_DEBUG
, SPP_FMT
"ipv6cp nak opts:",
3588 for (; len
> 1 && p
[1]; len
-= p
[1], p
+= p
[1]) {
3591 log(-1, "%s: received malicious IPCPv6 option, "
3592 "dropping\n", ifp
->if_xname
);
3596 log(-1, " %s", sppp_ipv6cp_opt_name(*p
));
3598 case IPV6CP_OPT_IFID
:
3600 * Peer doesn't like our local ifid. See
3601 * if we can do something for him. We'll drop
3602 * him our address then.
3604 if (len
< 10 || p
[1] != 10)
3606 bzero(&suggestaddr
, sizeof(suggestaddr
));
3607 suggestaddr
.s6_addr16
[0] = htons(0xfe80);
3608 suggestaddr
.s6_addr16
[1] = htons(sp
->pp_if
.if_index
);
3609 bcopy(&p
[2], &suggestaddr
.s6_addr
[8], 8);
3611 sp
->ipv6cp
.opts
|= (1 << IPV6CP_OPT_IFID
);
3613 log(-1, " [suggestaddr %s]",
3614 ip6_sprintf(&suggestaddr
));
3615 #ifdef IPV6CP_MYIFID_DYN
3617 * When doing dynamic address assignment,
3618 * we accept his offer.
3620 if (sp
->ipv6cp
.flags
& IPV6CP_MYIFID_DYN
) {
3621 struct in6_addr lastsuggest
;
3623 * If <suggested myaddr from peer> equals to
3624 * <hisaddr we have suggested last time>,
3625 * we have a collision. generate new random
3628 sppp_suggest_ip6_addr(&lastsuggest
);
3629 if (IN6_ARE_ADDR_EQUAL(&suggestaddr
,
3632 log(-1, " [random]");
3633 sppp_gen_ip6_addr(sp
, &suggestaddr
);
3635 sppp_set_ip6_addr(sp
, &suggestaddr
, 0);
3637 log(-1, " [agree]");
3638 sp
->ipv6cp
.flags
|= IPV6CP_MYIFID_SEEN
;
3642 * Since we do not do dynamic address assignment,
3643 * we ignore it and thus continue to negotiate
3644 * our already existing value. This can possibly
3645 * go into infinite request-reject loop.
3647 * This is not likely because we normally use
3648 * ifid based on MAC-address.
3649 * If you have no ethernet card on the node, too bad.
3650 * XXX should we use fail_counter?
3655 case IPV6CP_OPT_COMPRESS
:
3657 * Peer wants different compression parameters.
3666 kfree (buf
, M_TEMP
);
3670 sppp_ipv6cp_tlu(struct sppp
*sp
)
3672 /* we are up - notify isdn daemon */
3678 sppp_ipv6cp_tld(struct sppp
*sp
)
3683 sppp_ipv6cp_tls(struct sppp
*sp
)
3685 /* indicate to LCP that it must stay alive */
3686 sp
->lcp
.protos
|= (1 << IDX_IPV6CP
);
3690 sppp_ipv6cp_tlf(struct sppp
*sp
)
3693 #if 0 /* need #if 0 to close IPv6CP properly */
3694 /* we no longer need LCP */
3695 sp
->lcp
.protos
&= ~(1 << IDX_IPV6CP
);
3696 sppp_lcp_check_and_close(sp
);
3701 sppp_ipv6cp_scr(struct sppp
*sp
)
3703 char opt
[10 /* ifid */ + 4 /* compression, minimum */];
3704 struct in6_addr ouraddr
;
3707 if (sp
->ipv6cp
.opts
& (1 << IPV6CP_OPT_IFID
)) {
3708 sppp_get_ip6_addrs(sp
, &ouraddr
, 0, 0);
3709 opt
[i
++] = IPV6CP_OPT_IFID
;
3711 bcopy(&ouraddr
.s6_addr
[8], &opt
[i
], 8);
3716 if (sp
->ipv6cp
.opts
& (1 << IPV6CP_OPT_COMPRESSION
)) {
3717 opt
[i
++] = IPV6CP_OPT_COMPRESSION
;
3719 opt
[i
++] = 0; /* TBD */
3720 opt
[i
++] = 0; /* TBD */
3721 /* variable length data may follow */
3725 sp
->confid
[IDX_IPV6CP
] = ++sp
->pp_seq
[IDX_IPV6CP
];
3726 sppp_cp_send(sp
, PPP_IPV6CP
, CONF_REQ
, sp
->confid
[IDX_IPV6CP
], i
, &opt
);
3730 sppp_ipv6cp_init(struct sppp
*sp
)
3735 sppp_ipv6cp_up(struct sppp
*sp
)
3740 sppp_ipv6cp_down(struct sppp
*sp
)
3746 sppp_ipv6cp_open(struct sppp
*sp
)
3751 sppp_ipv6cp_close(struct sppp
*sp
)
3756 sppp_ipv6cp_TO(void *sp
)
3761 sppp_ipv6cp_RCR(struct sppp
*sp
, struct lcp_header
*h
, int len
)
3767 sppp_ipv6cp_RCN_rej(struct sppp
*sp
, struct lcp_header
*h
, int len
)
3772 sppp_ipv6cp_RCN_nak(struct sppp
*sp
, struct lcp_header
*h
, int len
)
3777 sppp_ipv6cp_tlu(struct sppp
*sp
)
3782 sppp_ipv6cp_tld(struct sppp
*sp
)
3787 sppp_ipv6cp_tls(struct sppp
*sp
)
3792 sppp_ipv6cp_tlf(struct sppp
*sp
)
3797 sppp_ipv6cp_scr(struct sppp
*sp
)
3803 *--------------------------------------------------------------------------*
3805 * The CHAP implementation. *
3807 *--------------------------------------------------------------------------*
3811 * The authentication protocols don't employ a full-fledged state machine as
3812 * the control protocols do, since they do have Open and Close events, but
3813 * not Up and Down, nor are they explicitly terminated. Also, use of the
3814 * authentication protocols may be different in both directions (this makes
3815 * sense, think of a machine that never accepts incoming calls but only
3816 * calls out, it doesn't require the called party to authenticate itself).
3818 * Our state machine for the local authentication protocol (we are requesting
3819 * the peer to authenticate) looks like:
3822 * +--------------------------------------------+
3824 * +--------+ Close +---------+ RCA+
3825 * | |<----------------------------------| |------+
3826 * +--->| Closed | TO* | Opened | sca |
3827 * | | |-----+ +-------| |<-----+
3828 * | +--------+ irc | | +---------+
3834 * | | +------->+ | |
3836 * | +--------+ V | |
3837 * | | |<----+<--------------------+ |
3843 * +------+ +------------------------------------------+
3844 * scn,tld sca,irc,ict,tlu
3849 * Open: LCP reached authentication phase
3850 * Close: LCP reached terminate phase
3852 * RCA+: received reply (pap-req, chap-response), acceptable
3853 * RCN: received reply (pap-req, chap-response), not acceptable
3854 * TO+: timeout with restart counter >= 0
3855 * TO-: timeout with restart counter < 0
3856 * TO*: reschedule timeout for CHAP
3858 * scr: send request packet (none for PAP, chap-challenge)
3859 * sca: send ack packet (pap-ack, chap-success)
3860 * scn: send nak packet (pap-nak, chap-failure)
3861 * ict: initialize re-challenge timer (CHAP only)
3863 * tlu: this-layer-up, LCP reaches network phase
3864 * tld: this-layer-down, LCP enters terminate phase
3866 * Note that in CHAP mode, after sending a new challenge, while the state
3867 * automaton falls back into Req-Sent state, it doesn't signal a tld
3868 * event to LCP, so LCP remains in network phase. Only after not getting
3869 * any response (or after getting an unacceptable response), CHAP closes,
3870 * causing LCP to enter terminate phase.
3872 * With PAP, there is no initial request that can be sent. The peer is
3873 * expected to send one based on the successful negotiation of PAP as
3874 * the authentication protocol during the LCP option negotiation.
3876 * Incoming authentication protocol requests (remote requests
3877 * authentication, we are peer) don't employ a state machine at all,
3878 * they are simply answered. Some peers [Ascend P50 firmware rev
3879 * 4.50] react allergically when sending IPCP requests while they are
3880 * still in authentication phase (thereby violating the standard that
3881 * demands that these NCP packets are to be discarded), so we keep
3882 * track of the peer demanding us to authenticate, and only proceed to
3883 * phase network once we've seen a positive acknowledge for the
3888 * Handle incoming CHAP packets.
3891 sppp_chap_input(struct sppp
*sp
, struct mbuf
*m
)
3894 struct lcp_header
*h
;
3896 u_char
*value
, *name
, digest
[AUTHKEYLEN
], dsize
;
3897 int value_len
, name_len
;
3900 len
= m
->m_pkthdr
.len
;
3904 SPP_FMT
"chap invalid packet length: %d bytes\n",
3905 SPP_ARGS(ifp
), len
);
3908 h
= mtod (m
, struct lcp_header
*);
3909 if (len
> ntohs (h
->len
))
3910 len
= ntohs (h
->len
);
3913 /* challenge, failure and success are his authproto */
3914 case CHAP_CHALLENGE
:
3915 value
= 1 + (u_char
*)(h
+1);
3916 value_len
= value
[-1];
3917 name
= value
+ value_len
;
3918 name_len
= len
- value_len
- 5;
3922 SPP_FMT
"chap corrupted challenge "
3923 "<%s id=0x%x len=%d",
3925 sppp_auth_type_name(PPP_CHAP
, h
->type
),
3926 h
->ident
, ntohs(h
->len
));
3927 sppp_print_bytes((u_char
*) (h
+1), len
-4);
3935 SPP_FMT
"chap input <%s id=0x%x len=%d name=",
3937 sppp_auth_type_name(PPP_CHAP
, h
->type
), h
->ident
,
3939 sppp_print_string((char*) name
, name_len
);
3940 log(-1, " value-size=%d value=", value_len
);
3941 sppp_print_bytes(value
, value_len
);
3945 /* Compute reply value. */
3947 MD5Update(&ctx
, &h
->ident
, 1);
3948 MD5Update(&ctx
, sp
->myauth
.secret
,
3949 strnlen(sp
->myauth
.secret
, AUTHKEYLEN
));
3950 MD5Update(&ctx
, value
, value_len
);
3951 MD5Final(digest
, &ctx
);
3952 dsize
= sizeof digest
;
3954 sppp_auth_send(&chap
, sp
, CHAP_RESPONSE
, h
->ident
,
3955 sizeof dsize
, (const char *)&dsize
,
3956 sizeof digest
, digest
,
3957 (size_t)strnlen(sp
->myauth
.name
, AUTHNAMELEN
),
3964 log(LOG_DEBUG
, SPP_FMT
"chap success",
3968 sppp_print_string((char*)(h
+ 1), len
- 4);
3975 sp
->pp_flags
&= ~PP_NEEDAUTH
;
3976 if (sp
->myauth
.proto
== PPP_CHAP
&&
3977 (sp
->lcp
.opts
& (1 << LCP_OPT_AUTH_PROTO
)) &&
3978 (sp
->lcp
.protos
& (1 << IDX_CHAP
)) == 0) {
3980 * We are authenticator for CHAP but didn't
3981 * complete yet. Leave it to tlu to proceed
3988 sppp_phase_network(sp
);
3993 log(LOG_INFO
, SPP_FMT
"chap failure",
3997 sppp_print_string((char*)(h
+ 1), len
- 4);
4001 log(LOG_INFO
, SPP_FMT
"chap failure\n",
4003 /* await LCP shutdown by authenticator */
4006 /* response is my authproto */
4008 value
= 1 + (u_char
*)(h
+1);
4009 value_len
= value
[-1];
4010 name
= value
+ value_len
;
4011 name_len
= len
- value_len
- 5;
4015 SPP_FMT
"chap corrupted response "
4016 "<%s id=0x%x len=%d",
4018 sppp_auth_type_name(PPP_CHAP
, h
->type
),
4019 h
->ident
, ntohs(h
->len
));
4020 sppp_print_bytes((u_char
*)(h
+1), len
-4);
4025 if (h
->ident
!= sp
->confid
[IDX_CHAP
]) {
4028 SPP_FMT
"chap dropping response for old ID "
4029 "(got %d, expected %d)\n",
4031 h
->ident
, sp
->confid
[IDX_CHAP
]);
4034 if (name_len
!= strnlen(sp
->hisauth
.name
, AUTHNAMELEN
)
4035 || bcmp(name
, sp
->hisauth
.name
, name_len
) != 0) {
4036 log(LOG_INFO
, SPP_FMT
"chap response, his name ",
4038 sppp_print_string(name
, name_len
);
4039 log(-1, " != expected ");
4040 sppp_print_string(sp
->hisauth
.name
,
4041 strnlen(sp
->hisauth
.name
, AUTHNAMELEN
));
4045 log(LOG_DEBUG
, SPP_FMT
"chap input(%s) "
4046 "<%s id=0x%x len=%d name=",
4048 sppp_state_name(sp
->state
[IDX_CHAP
]),
4049 sppp_auth_type_name(PPP_CHAP
, h
->type
),
4050 h
->ident
, ntohs (h
->len
));
4051 sppp_print_string((char*)name
, name_len
);
4052 log(-1, " value-size=%d value=", value_len
);
4053 sppp_print_bytes(value
, value_len
);
4056 if (value_len
!= AUTHKEYLEN
) {
4059 SPP_FMT
"chap bad hash value length: "
4060 "%d bytes, should be %d\n",
4061 SPP_ARGS(ifp
), value_len
,
4067 MD5Update(&ctx
, &h
->ident
, 1);
4068 MD5Update(&ctx
, sp
->hisauth
.secret
,
4069 strnlen(sp
->hisauth
.secret
, AUTHKEYLEN
));
4070 MD5Update(&ctx
, sp
->myauth
.challenge
, AUTHKEYLEN
);
4071 MD5Final(digest
, &ctx
);
4073 #define FAILMSG "Failed..."
4074 #define SUCCMSG "Welcome!"
4076 if (value_len
!= sizeof digest
||
4077 bcmp(digest
, value
, value_len
) != 0) {
4078 /* action scn, tld */
4079 sppp_auth_send(&chap
, sp
, CHAP_FAILURE
, h
->ident
,
4080 sizeof(FAILMSG
) - 1, (u_char
*)FAILMSG
,
4085 /* action sca, perhaps tlu */
4086 if (sp
->state
[IDX_CHAP
] == STATE_REQ_SENT
||
4087 sp
->state
[IDX_CHAP
] == STATE_OPENED
)
4088 sppp_auth_send(&chap
, sp
, CHAP_SUCCESS
, h
->ident
,
4089 sizeof(SUCCMSG
) - 1, (u_char
*)SUCCMSG
,
4091 if (sp
->state
[IDX_CHAP
] == STATE_REQ_SENT
) {
4092 sppp_cp_change_state(&chap
, sp
, STATE_OPENED
);
4098 /* Unknown CHAP packet type -- ignore. */
4100 log(LOG_DEBUG
, SPP_FMT
"chap unknown input(%s) "
4101 "<0x%x id=0x%xh len=%d",
4103 sppp_state_name(sp
->state
[IDX_CHAP
]),
4104 h
->type
, h
->ident
, ntohs(h
->len
));
4105 sppp_print_bytes((u_char
*)(h
+1), len
-4);
4114 sppp_chap_init(struct sppp
*sp
)
4116 /* Chap doesn't have STATE_INITIAL at all. */
4117 sp
->state
[IDX_CHAP
] = STATE_CLOSED
;
4118 sp
->fail_counter
[IDX_CHAP
] = 0;
4119 sp
->pp_seq
[IDX_CHAP
] = 0;
4120 sp
->pp_rseq
[IDX_CHAP
] = 0;
4121 callout_init(&sp
->timeout
[IDX_CHAP
]);
4125 sppp_chap_open(struct sppp
*sp
)
4127 if (sp
->myauth
.proto
== PPP_CHAP
&&
4128 (sp
->lcp
.opts
& (1 << LCP_OPT_AUTH_PROTO
)) != 0) {
4129 /* we are authenticator for CHAP, start it */
4131 sp
->rst_counter
[IDX_CHAP
] = sp
->lcp
.max_configure
;
4132 sppp_cp_change_state(&chap
, sp
, STATE_REQ_SENT
);
4134 /* nothing to be done if we are peer, await a challenge */
4138 sppp_chap_close(struct sppp
*sp
)
4140 if (sp
->state
[IDX_CHAP
] != STATE_CLOSED
)
4141 sppp_cp_change_state(&chap
, sp
, STATE_CLOSED
);
4145 sppp_chap_TO(void *cookie
)
4147 struct sppp
*sp
= (struct sppp
*)cookie
;
4153 log(LOG_DEBUG
, SPP_FMT
"chap TO(%s) rst_counter = %d\n",
4155 sppp_state_name(sp
->state
[IDX_CHAP
]),
4156 sp
->rst_counter
[IDX_CHAP
]);
4158 if (--sp
->rst_counter
[IDX_CHAP
] < 0)
4160 switch (sp
->state
[IDX_CHAP
]) {
4161 case STATE_REQ_SENT
:
4163 sppp_cp_change_state(&chap
, sp
, STATE_CLOSED
);
4167 /* TO+ (or TO*) event */
4168 switch (sp
->state
[IDX_CHAP
]) {
4171 sp
->rst_counter
[IDX_CHAP
] = sp
->lcp
.max_configure
;
4173 case STATE_REQ_SENT
:
4175 /* sppp_cp_change_state() will restart the timer */
4176 sppp_cp_change_state(&chap
, sp
, STATE_REQ_SENT
);
4184 sppp_chap_tlu(struct sppp
*sp
)
4190 sp
->rst_counter
[IDX_CHAP
] = sp
->lcp
.max_configure
;
4193 * Some broken CHAP implementations (Conware CoNet, firmware
4194 * 4.0.?) don't want to re-authenticate their CHAP once the
4195 * initial challenge-response exchange has taken place.
4196 * Provide for an option to avoid rechallenges.
4198 if ((sp
->hisauth
.flags
& AUTHFLAG_NORECHALLENGE
) == 0) {
4200 * Compute the re-challenge timeout. This will yield
4201 * a number between 300 and 810 seconds.
4203 i
= 300 + ((unsigned)(krandom() & 0xff00) >> 7);
4204 callout_reset(&sp
->timeout
[IDX_CHAP
], i
* hz
, chap
.TO
, sp
);
4209 SPP_FMT
"chap %s, ",
4211 sp
->pp_phase
== PHASE_NETWORK
? "reconfirmed": "tlu");
4212 if ((sp
->hisauth
.flags
& AUTHFLAG_NORECHALLENGE
) == 0)
4213 log(-1, "next re-challenge in %d seconds\n", i
);
4215 log(-1, "re-challenging suppressed\n");
4220 /* indicate to LCP that we need to be closed down */
4221 sp
->lcp
.protos
|= (1 << IDX_CHAP
);
4223 if (sp
->pp_flags
& PP_NEEDAUTH
) {
4225 * Remote is authenticator, but his auth proto didn't
4226 * complete yet. Defer the transition to network
4236 * If we are already in phase network, we are done here. This
4237 * is the case if this is a dummy tlu event after a re-challenge.
4239 if (sp
->pp_phase
!= PHASE_NETWORK
)
4240 sppp_phase_network(sp
);
4244 sppp_chap_tld(struct sppp
*sp
)
4249 log(LOG_DEBUG
, SPP_FMT
"chap tld\n", SPP_ARGS(ifp
));
4250 callout_stop(&sp
->timeout
[IDX_CHAP
]);
4251 sp
->lcp
.protos
&= ~(1 << IDX_CHAP
);
4257 sppp_chap_scr(struct sppp
*sp
)
4262 /* Compute random challenge. */
4263 ch
= (u_long
*)sp
->myauth
.challenge
;
4264 read_random(&seed
, sizeof seed
);
4265 ch
[0] = seed
^ krandom();
4266 ch
[1] = seed
^ krandom();
4267 ch
[2] = seed
^ krandom();
4268 ch
[3] = seed
^ krandom();
4271 sp
->confid
[IDX_CHAP
] = ++sp
->pp_seq
[IDX_CHAP
];
4273 sppp_auth_send(&chap
, sp
, CHAP_CHALLENGE
, sp
->confid
[IDX_CHAP
],
4274 sizeof clen
, (const char *)&clen
,
4275 (size_t)AUTHKEYLEN
, sp
->myauth
.challenge
,
4276 (size_t)strnlen(sp
->myauth
.name
, AUTHNAMELEN
),
4282 *--------------------------------------------------------------------------*
4284 * The PAP implementation. *
4286 *--------------------------------------------------------------------------*
4289 * For PAP, we need to keep a little state also if we are the peer, not the
4290 * authenticator. This is since we don't get a request to authenticate, but
4291 * have to repeatedly authenticate ourself until we got a response (or the
4292 * retry counter is expired).
4296 * Handle incoming PAP packets. */
4298 sppp_pap_input(struct sppp
*sp
, struct mbuf
*m
)
4301 struct lcp_header
*h
;
4303 u_char
*name
, *passwd
, mlen
;
4304 int name_len
, passwd_len
;
4307 * Malicious input might leave this uninitialized, so
4308 * init to an impossible value.
4312 len
= m
->m_pkthdr
.len
;
4316 SPP_FMT
"pap invalid packet length: %d bytes\n",
4317 SPP_ARGS(ifp
), len
);
4320 h
= mtod (m
, struct lcp_header
*);
4321 if (len
> ntohs (h
->len
))
4322 len
= ntohs (h
->len
);
4324 /* PAP request is my authproto */
4326 name
= 1 + (u_char
*)(h
+1);
4327 name_len
= name
[-1];
4328 passwd
= name
+ name_len
+ 1;
4329 if (name_len
> len
- 6 ||
4330 (passwd_len
= passwd
[-1]) > len
- 6 - name_len
) {
4332 log(LOG_DEBUG
, SPP_FMT
"pap corrupted input "
4333 "<%s id=0x%x len=%d",
4335 sppp_auth_type_name(PPP_PAP
, h
->type
),
4336 h
->ident
, ntohs(h
->len
));
4337 sppp_print_bytes((u_char
*)(h
+1), len
-4);
4343 log(LOG_DEBUG
, SPP_FMT
"pap input(%s) "
4344 "<%s id=0x%x len=%d name=",
4346 sppp_state_name(sp
->state
[IDX_PAP
]),
4347 sppp_auth_type_name(PPP_PAP
, h
->type
),
4348 h
->ident
, ntohs(h
->len
));
4349 sppp_print_string((char*)name
, name_len
);
4350 log(-1, " passwd=");
4351 sppp_print_string((char*)passwd
, passwd_len
);
4354 if (name_len
!= strnlen(sp
->hisauth
.name
, AUTHNAMELEN
) ||
4355 passwd_len
!= strnlen(sp
->hisauth
.secret
, AUTHKEYLEN
) ||
4356 bcmp(name
, sp
->hisauth
.name
, name_len
) != 0 ||
4357 bcmp(passwd
, sp
->hisauth
.secret
, passwd_len
) != 0) {
4358 /* action scn, tld */
4359 mlen
= sizeof(FAILMSG
) - 1;
4360 sppp_auth_send(&pap
, sp
, PAP_NAK
, h
->ident
,
4361 sizeof mlen
, (const char *)&mlen
,
4362 sizeof(FAILMSG
) - 1, (u_char
*)FAILMSG
,
4367 /* action sca, perhaps tlu */
4368 if (sp
->state
[IDX_PAP
] == STATE_REQ_SENT
||
4369 sp
->state
[IDX_PAP
] == STATE_OPENED
) {
4370 mlen
= sizeof(SUCCMSG
) - 1;
4371 sppp_auth_send(&pap
, sp
, PAP_ACK
, h
->ident
,
4372 sizeof mlen
, (const char *)&mlen
,
4373 sizeof(SUCCMSG
) - 1, (u_char
*)SUCCMSG
,
4376 if (sp
->state
[IDX_PAP
] == STATE_REQ_SENT
) {
4377 sppp_cp_change_state(&pap
, sp
, STATE_OPENED
);
4382 /* ack and nak are his authproto */
4384 callout_stop(&sp
->pap_my_to
);
4386 log(LOG_DEBUG
, SPP_FMT
"pap success",
4388 name
= 1 + (u_char
*)(h
+ 1);
4389 name_len
= name
[-1];
4390 if (len
> 5 && name_len
< len
+4) {
4392 sppp_print_string(name
, name_len
);
4399 sp
->pp_flags
&= ~PP_NEEDAUTH
;
4400 if (sp
->myauth
.proto
== PPP_PAP
&&
4401 (sp
->lcp
.opts
& (1 << LCP_OPT_AUTH_PROTO
)) &&
4402 (sp
->lcp
.protos
& (1 << IDX_PAP
)) == 0) {
4404 * We are authenticator for PAP but didn't
4405 * complete yet. Leave it to tlu to proceed
4416 sppp_phase_network(sp
);
4420 callout_stop(&sp
->pap_my_to
);
4422 log(LOG_INFO
, SPP_FMT
"pap failure",
4424 name
= 1 + (u_char
*)(h
+ 1);
4425 name_len
= name
[-1];
4426 if (len
> 5 && name_len
< len
+4) {
4428 sppp_print_string(name
, name_len
);
4432 log(LOG_INFO
, SPP_FMT
"pap failure\n",
4434 /* await LCP shutdown by authenticator */
4438 /* Unknown PAP packet type -- ignore. */
4440 log(LOG_DEBUG
, SPP_FMT
"pap corrupted input "
4441 "<0x%x id=0x%x len=%d",
4443 h
->type
, h
->ident
, ntohs(h
->len
));
4444 sppp_print_bytes((u_char
*)(h
+1), len
-4);
4453 sppp_pap_init(struct sppp
*sp
)
4455 /* PAP doesn't have STATE_INITIAL at all. */
4456 sp
->state
[IDX_PAP
] = STATE_CLOSED
;
4457 sp
->fail_counter
[IDX_PAP
] = 0;
4458 sp
->pp_seq
[IDX_PAP
] = 0;
4459 sp
->pp_rseq
[IDX_PAP
] = 0;
4460 callout_init(&sp
->timeout
[IDX_PAP
]);
4461 callout_init(&sp
->pap_my_to
);
4465 sppp_pap_open(struct sppp
*sp
)
4467 if (sp
->hisauth
.proto
== PPP_PAP
&&
4468 (sp
->lcp
.opts
& (1 << LCP_OPT_AUTH_PROTO
)) != 0) {
4469 /* we are authenticator for PAP, start our timer */
4470 sp
->rst_counter
[IDX_PAP
] = sp
->lcp
.max_configure
;
4471 sppp_cp_change_state(&pap
, sp
, STATE_REQ_SENT
);
4473 if (sp
->myauth
.proto
== PPP_PAP
) {
4474 /* we are peer, send a request, and start a timer */
4476 callout_reset(&sp
->pap_my_to
, sp
->lcp
.timeout
,
4477 sppp_pap_my_TO
, sp
);
4482 sppp_pap_close(struct sppp
*sp
)
4484 if (sp
->state
[IDX_PAP
] != STATE_CLOSED
)
4485 sppp_cp_change_state(&pap
, sp
, STATE_CLOSED
);
4489 * That's the timeout routine if we are authenticator. Since the
4490 * authenticator is basically passive in PAP, we can't do much here.
4493 sppp_pap_TO(void *cookie
)
4495 struct sppp
*sp
= (struct sppp
*)cookie
;
4501 log(LOG_DEBUG
, SPP_FMT
"pap TO(%s) rst_counter = %d\n",
4503 sppp_state_name(sp
->state
[IDX_PAP
]),
4504 sp
->rst_counter
[IDX_PAP
]);
4506 if (--sp
->rst_counter
[IDX_PAP
] < 0)
4508 switch (sp
->state
[IDX_PAP
]) {
4509 case STATE_REQ_SENT
:
4511 sppp_cp_change_state(&pap
, sp
, STATE_CLOSED
);
4515 /* TO+ event, not very much we could do */
4516 switch (sp
->state
[IDX_PAP
]) {
4517 case STATE_REQ_SENT
:
4518 /* sppp_cp_change_state() will restart the timer */
4519 sppp_cp_change_state(&pap
, sp
, STATE_REQ_SENT
);
4527 * That's the timeout handler if we are peer. Since the peer is active,
4528 * we need to retransmit our PAP request since it is apparently lost.
4529 * XXX We should impose a max counter.
4532 sppp_pap_my_TO(void *cookie
)
4534 struct sppp
*sp
= (struct sppp
*)cookie
;
4538 log(LOG_DEBUG
, SPP_FMT
"pap peer TO\n",
4545 sppp_pap_tlu(struct sppp
*sp
)
4549 sp
->rst_counter
[IDX_PAP
] = sp
->lcp
.max_configure
;
4552 log(LOG_DEBUG
, SPP_FMT
"%s tlu\n",
4553 SPP_ARGS(ifp
), pap
.name
);
4557 /* indicate to LCP that we need to be closed down */
4558 sp
->lcp
.protos
|= (1 << IDX_PAP
);
4560 if (sp
->pp_flags
& PP_NEEDAUTH
) {
4562 * Remote is authenticator, but his auth proto didn't
4563 * complete yet. Defer the transition to network
4570 sppp_phase_network(sp
);
4574 sppp_pap_tld(struct sppp
*sp
)
4579 log(LOG_DEBUG
, SPP_FMT
"pap tld\n", SPP_ARGS(ifp
));
4580 callout_stop(&sp
->timeout
[IDX_PAP
]);
4581 callout_stop(&sp
->pap_my_to
);
4582 sp
->lcp
.protos
&= ~(1 << IDX_PAP
);
4588 sppp_pap_scr(struct sppp
*sp
)
4590 u_char idlen
, pwdlen
;
4592 sp
->confid
[IDX_PAP
] = ++sp
->pp_seq
[IDX_PAP
];
4593 pwdlen
= strnlen(sp
->myauth
.secret
, AUTHKEYLEN
);
4594 idlen
= strnlen(sp
->myauth
.name
, AUTHNAMELEN
);
4596 sppp_auth_send(&pap
, sp
, PAP_REQ
, sp
->confid
[IDX_PAP
],
4597 sizeof idlen
, (const char *)&idlen
,
4598 (size_t)idlen
, sp
->myauth
.name
,
4599 sizeof pwdlen
, (const char *)&pwdlen
,
4600 (size_t)pwdlen
, sp
->myauth
.secret
,
4605 * Random miscellaneous functions.
4609 * Send a PAP or CHAP proto packet.
4611 * Varadic function, each of the elements for the ellipsis is of type
4612 * ``size_t mlen, const u_char *msg''. Processing will stop iff
4614 * NOTE: never declare variadic functions with types subject to type
4615 * promotion (i.e. u_char). This is asking for big trouble depending
4616 * on the architecture you are on...
4620 sppp_auth_send(const struct cp
*cp
, struct sppp
*sp
,
4621 unsigned int type
, unsigned int id
,
4625 struct ppp_header
*h
;
4626 struct lcp_header
*lh
;
4632 struct ifaltq_subque
*ifsq
;
4635 MGETHDR (m
, M_NOWAIT
, MT_DATA
);
4638 m
->m_pkthdr
.rcvif
= 0;
4640 h
= mtod (m
, struct ppp_header
*);
4641 h
->address
= PPP_ALLSTATIONS
; /* broadcast address */
4642 h
->control
= PPP_UI
; /* Unnumbered Info */
4643 h
->protocol
= htons(cp
->proto
);
4645 lh
= (struct lcp_header
*)(h
+ 1);
4648 p
= (u_char
*) (lh
+1);
4653 while ((mlen
= (unsigned int)__va_arg(ap
, size_t)) != 0) {
4654 msg
= __va_arg(ap
, const char *);
4656 if (len
> MHLEN
- PPP_HEADER_LEN
- LCP_HEADER_LEN
) {
4662 bcopy(msg
, p
, mlen
);
4667 m
->m_pkthdr
.len
= m
->m_len
= PPP_HEADER_LEN
+ LCP_HEADER_LEN
+ len
;
4668 lh
->len
= htons (LCP_HEADER_LEN
+ len
);
4671 log(LOG_DEBUG
, SPP_FMT
"%s output <%s id=0x%x len=%d",
4672 SPP_ARGS(ifp
), cp
->name
,
4673 sppp_auth_type_name(cp
->proto
, lh
->type
),
4674 lh
->ident
, ntohs(lh
->len
));
4675 sppp_print_bytes((u_char
*) (lh
+1), len
);
4678 if (IF_QFULL (&sp
->pp_cpq
)) {
4679 IF_DROP (&sp
->pp_fastq
);
4681 IFNET_STAT_INC(ifp
, oerrors
, 1);
4683 IF_ENQUEUE (&sp
->pp_cpq
, m
);
4684 ifsq
= ifq_get_subq_default(&ifp
->if_snd
);
4685 if (!ifsq_is_oactive(ifsq
))
4686 (*ifp
->if_start
) (ifp
, ifsq
);
4687 IFNET_STAT_INC(ifp
, obytes
, m
->m_pkthdr
.len
+ 3);
4691 * Send keepalive packets, every 10 seconds.
4694 sppp_keepalive(void *dummy
)
4700 for (sp
=spppq
; sp
; sp
=sp
->pp_next
) {
4701 struct ifnet
*ifp
= &sp
->pp_if
;
4703 /* Keepalive mode disabled or channel down? */
4704 if (! (sp
->pp_flags
& PP_KEEPALIVE
) ||
4705 ! (ifp
->if_flags
& IFF_RUNNING
))
4708 /* No keepalive in PPP mode if LCP not opened yet. */
4709 if (sp
->pp_mode
!= IFF_CISCO
&&
4710 sp
->pp_phase
< PHASE_AUTHENTICATE
)
4713 if (sp
->pp_alivecnt
== MAXALIVECNT
) {
4714 /* No keepalive packets got. Stop the interface. */
4715 kprintf (SPP_FMT
"down\n", SPP_ARGS(ifp
));
4717 IF_DRAIN(&sp
->pp_cpq
);
4718 if (sp
->pp_mode
!= IFF_CISCO
) {
4720 /* Shut down the PPP link. */
4722 /* Initiate negotiation. XXX */
4726 ifnet_serialize_all(ifp
);
4727 if (sp
->pp_alivecnt
<= MAXALIVECNT
)
4729 if (sp
->pp_mode
== IFF_CISCO
)
4730 sppp_cisco_send (sp
, CISCO_KEEPALIVE_REQ
,
4731 ++sp
->pp_seq
[IDX_LCP
], sp
->pp_rseq
[IDX_LCP
]);
4732 else if (sp
->pp_phase
>= PHASE_AUTHENTICATE
) {
4733 long nmagic
= htonl (sp
->lcp
.magic
);
4734 sp
->lcp
.echoid
= ++sp
->pp_seq
[IDX_LCP
];
4735 sppp_cp_send (sp
, PPP_LCP
, ECHO_REQ
,
4736 sp
->lcp
.echoid
, 4, &nmagic
);
4738 ifnet_deserialize_all(ifp
);
4740 callout_reset(&keepalive_timeout
, hz
* 10, sppp_keepalive
, NULL
);
4745 * Get both IP addresses.
4748 sppp_get_ip_addrs(struct sppp
*sp
, u_long
*src
, u_long
*dst
, u_long
*srcmask
)
4750 struct ifnet
*ifp
= &sp
->pp_if
;
4751 struct ifaddr_container
*ifac
;
4753 struct sockaddr_in
*si
, *sm
;
4759 *srcmask
= 0; /* avoid gcc warnings */
4761 * Pick the first AF_INET address from the list,
4762 * aliases don't make any sense on a p2p link anyway.
4765 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
4767 if (ifa
->ifa_addr
->sa_family
== AF_INET
) {
4768 si
= (struct sockaddr_in
*)ifa
->ifa_addr
;
4769 sm
= (struct sockaddr_in
*)ifa
->ifa_netmask
;
4775 if (si
&& si
->sin_addr
.s_addr
) {
4776 ssrc
= si
->sin_addr
.s_addr
;
4778 *srcmask
= ntohl(sm
->sin_addr
.s_addr
);
4781 si
= (struct sockaddr_in
*)ifa
->ifa_dstaddr
;
4782 if (si
&& si
->sin_addr
.s_addr
)
4783 ddst
= si
->sin_addr
.s_addr
;
4786 if (dst
) *dst
= ntohl(ddst
);
4787 if (src
) *src
= ntohl(ssrc
);
4791 * Set my IP address. Must be called at splimp.
4794 sppp_set_ip_addr(struct sppp
*sp
, u_long src
)
4797 struct ifaddr_container
*ifac
;
4798 struct ifaddr
*ifa
= NULL
;
4799 struct sockaddr_in
*si
;
4800 struct in_ifaddr
*ia
;
4803 * Pick the first AF_INET address from the list,
4804 * aliases don't make any sense on a p2p link anyway.
4807 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
4809 if (ifa
->ifa_addr
->sa_family
== AF_INET
) {
4810 si
= (struct sockaddr_in
*)ifa
->ifa_addr
;
4816 if (ifac
!= NULL
&& si
!= NULL
) {
4819 /* delete old route */
4820 error
= rtinit(ifa
, (int)RTM_DELETE
, RTF_HOST
);
4823 log(LOG_DEBUG
, SPP_FMT
"sppp_set_ip_addr: rtinit DEL failed, error=%d\n",
4824 SPP_ARGS(ifp
), error
);
4828 in_iahash_remove(ia
);
4830 /* set new address */
4831 si
->sin_addr
.s_addr
= htonl(src
);
4832 in_iahash_insert(ia
);
4835 error
= rtinit(ifa
, (int)RTM_ADD
, RTF_HOST
);
4838 log(LOG_DEBUG
, SPP_FMT
"sppp_set_ip_addr: rtinit ADD failed, error=%d",
4839 SPP_ARGS(ifp
), error
);
4846 * Get both IPv6 addresses.
4849 sppp_get_ip6_addrs(struct sppp
*sp
, struct in6_addr
*src
, struct in6_addr
*dst
,
4850 struct in6_addr
*srcmask
)
4852 struct ifnet
*ifp
= &sp
->pp_if
;
4853 struct ifaddr_container
*ifac
;
4855 struct sockaddr_in6
*si
, *sm
;
4856 struct in6_addr ssrc
, ddst
;
4859 bzero(&ssrc
, sizeof(ssrc
));
4860 bzero(&ddst
, sizeof(ddst
));
4862 * Pick the first link-local AF_INET6 address from the list,
4863 * aliases don't make any sense on a p2p link anyway.
4866 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
4868 if (ifa
->ifa_addr
->sa_family
== AF_INET6
) {
4869 si
= (struct sockaddr_in6
*)ifa
->ifa_addr
;
4870 sm
= (struct sockaddr_in6
*)ifa
->ifa_netmask
;
4871 if (si
&& IN6_IS_ADDR_LINKLOCAL(&si
->sin6_addr
))
4876 if (si
&& !IN6_IS_ADDR_UNSPECIFIED(&si
->sin6_addr
)) {
4877 bcopy(&si
->sin6_addr
, &ssrc
, sizeof(ssrc
));
4879 bcopy(&sm
->sin6_addr
, srcmask
,
4884 si
= (struct sockaddr_in6
*)ifa
->ifa_dstaddr
;
4885 if (si
&& !IN6_IS_ADDR_UNSPECIFIED(&si
->sin6_addr
))
4886 bcopy(&si
->sin6_addr
, &ddst
, sizeof(ddst
));
4890 bcopy(&ddst
, dst
, sizeof(*dst
));
4892 bcopy(&ssrc
, src
, sizeof(*src
));
4895 #ifdef IPV6CP_MYIFID_DYN
4897 * Generate random ifid.
4900 sppp_gen_ip6_addr(struct sppp
*sp
, struct in6_addr
*addr
)
4906 * Set my IPv6 address. Must be called at splimp.
4909 sppp_set_ip6_addr(struct sppp
*sp
, const struct in6_addr
*src
)
4912 struct ifaddr_container
*ifac
;
4914 struct sockaddr_in6
*sin6
;
4917 * Pick the first link-local AF_INET6 address from the list,
4918 * aliases don't make any sense on a p2p link anyway.
4922 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
4924 if (ifa
->ifa_addr
->sa_family
== AF_INET6
) {
4925 sin6
= (struct sockaddr_in6
*)ifa
->ifa_addr
;
4926 if (sin6
&& IN6_IS_ADDR_LINKLOCAL(&sin6
->sin6_addr
))
4931 if (ifac
!= NULL
&& sin6
!= NULL
) {
4933 struct sockaddr_in6 new_sin6
= *sin6
;
4935 bcopy(src
, &new_sin6
.sin6_addr
, sizeof(new_sin6
.sin6_addr
));
4936 error
= in6_ifinit(ifp
, ifatoia6(ifa
), &new_sin6
, 1);
4937 if (debug
&& error
) {
4938 log(LOG_DEBUG
, SPP_FMT
"sppp_set_ip6_addr: in6_ifinit "
4939 " failed, error=%d\n", SPP_ARGS(ifp
), error
);
4946 * Suggest a candidate address to be used by peer.
4949 sppp_suggest_ip6_addr(struct sppp
*sp
, struct in6_addr
*suggest
)
4951 struct in6_addr myaddr
;
4954 sppp_get_ip6_addrs(sp
, &myaddr
, 0, 0);
4956 myaddr
.s6_addr
[8] &= ~0x02; /* u bit to "local" */
4958 if ((tv
.tv_usec
& 0xff) == 0 && (tv
.tv_sec
& 0xff) == 0) {
4959 myaddr
.s6_addr
[14] ^= 0xff;
4960 myaddr
.s6_addr
[15] ^= 0xff;
4962 myaddr
.s6_addr
[14] ^= (tv
.tv_usec
& 0xff);
4963 myaddr
.s6_addr
[15] ^= (tv
.tv_sec
& 0xff);
4966 bcopy(&myaddr
, suggest
, sizeof(myaddr
));
4971 sppp_params(struct sppp
*sp
, u_long cmd
, void *data
)
4974 struct ifreq
*ifr
= (struct ifreq
*)data
;
4975 struct spppreq
*spr
;
4978 spr
= kmalloc(sizeof(struct spppreq
), M_TEMP
, M_INTWAIT
);
4981 * ifr->ifr_data is supposed to point to a struct spppreq.
4982 * Check the cmd word first before attempting to fetch all the
4985 if ((subcmd
= fuword64(ifr
->ifr_data
)) == -1) {
4990 if (copyin((caddr_t
)ifr
->ifr_data
, spr
, sizeof(struct spppreq
)) != 0) {
4996 case (u_long
)SPPPIOGDEFS
:
4997 if (cmd
!= SIOCGIFGENERIC
) {
5002 * We copy over the entire current state, but clean
5003 * out some of the stuff we don't wanna pass up.
5004 * Remember, SIOCGIFGENERIC is unprotected, and can be
5005 * called by any user. No need to ever get PAP or
5006 * CHAP secrets back to userland anyway.
5008 spr
->defs
.pp_phase
= sp
->pp_phase
;
5009 spr
->defs
.enable_vj
= (sp
->confflags
& CONF_ENABLE_VJ
) != 0;
5010 spr
->defs
.enable_ipv6
= (sp
->confflags
& CONF_ENABLE_IPV6
) != 0;
5011 spr
->defs
.lcp
= sp
->lcp
;
5012 spr
->defs
.ipcp
= sp
->ipcp
;
5013 spr
->defs
.ipv6cp
= sp
->ipv6cp
;
5014 spr
->defs
.myauth
= sp
->myauth
;
5015 spr
->defs
.hisauth
= sp
->hisauth
;
5016 bzero(spr
->defs
.myauth
.secret
, AUTHKEYLEN
);
5017 bzero(spr
->defs
.myauth
.challenge
, AUTHKEYLEN
);
5018 bzero(spr
->defs
.hisauth
.secret
, AUTHKEYLEN
);
5019 bzero(spr
->defs
.hisauth
.challenge
, AUTHKEYLEN
);
5021 * Fixup the LCP timeout value to milliseconds so
5022 * spppcontrol doesn't need to bother about the value
5023 * of "hz". We do the reverse calculation below when
5026 spr
->defs
.lcp
.timeout
= sp
->lcp
.timeout
* 1000 / hz
;
5027 rv
= copyout(spr
, (caddr_t
)ifr
->ifr_data
,
5028 sizeof(struct spppreq
));
5031 case (u_long
)SPPPIOSDEFS
:
5032 if (cmd
!= SIOCSIFGENERIC
) {
5037 * We have a very specific idea of which fields we
5038 * allow being passed back from userland, so to not
5039 * clobber our current state. For one, we only allow
5040 * setting anything if LCP is in dead or establish
5041 * phase. Once the authentication negotiations
5042 * started, the authentication settings must not be
5043 * changed again. (The administrator can force an
5044 * ifconfig down in order to get LCP back into dead
5047 * Also, we only allow for authentication parameters to be
5050 * XXX Should allow to set or clear pp_flags.
5052 * Finally, if the respective authentication protocol to
5053 * be used is set differently than 0, but the secret is
5054 * passed as all zeros, we don't trash the existing secret.
5055 * This allows an administrator to change the system name
5056 * only without clobbering the secret (which he didn't get
5057 * back in a previous SPPPIOGDEFS call). However, the
5058 * secrets are cleared if the authentication protocol is
5060 if (sp
->pp_phase
!= PHASE_DEAD
&&
5061 sp
->pp_phase
!= PHASE_ESTABLISH
) {
5066 if ((spr
->defs
.myauth
.proto
!= 0 && spr
->defs
.myauth
.proto
!= PPP_PAP
&&
5067 spr
->defs
.myauth
.proto
!= PPP_CHAP
) ||
5068 (spr
->defs
.hisauth
.proto
!= 0 && spr
->defs
.hisauth
.proto
!= PPP_PAP
&&
5069 spr
->defs
.hisauth
.proto
!= PPP_CHAP
)) {
5074 if (spr
->defs
.myauth
.proto
== 0)
5075 /* resetting myauth */
5076 bzero(&sp
->myauth
, sizeof sp
->myauth
);
5078 /* setting/changing myauth */
5079 sp
->myauth
.proto
= spr
->defs
.myauth
.proto
;
5080 bcopy(spr
->defs
.myauth
.name
, sp
->myauth
.name
, AUTHNAMELEN
);
5081 if (spr
->defs
.myauth
.secret
[0] != '\0')
5082 bcopy(spr
->defs
.myauth
.secret
, sp
->myauth
.secret
,
5085 if (spr
->defs
.hisauth
.proto
== 0)
5086 /* resetting hisauth */
5087 bzero(&sp
->hisauth
, sizeof sp
->hisauth
);
5089 /* setting/changing hisauth */
5090 sp
->hisauth
.proto
= spr
->defs
.hisauth
.proto
;
5091 sp
->hisauth
.flags
= spr
->defs
.hisauth
.flags
;
5092 bcopy(spr
->defs
.hisauth
.name
, sp
->hisauth
.name
, AUTHNAMELEN
);
5093 if (spr
->defs
.hisauth
.secret
[0] != '\0')
5094 bcopy(spr
->defs
.hisauth
.secret
, sp
->hisauth
.secret
,
5097 /* set LCP restart timer timeout */
5098 if (spr
->defs
.lcp
.timeout
!= 0)
5099 sp
->lcp
.timeout
= spr
->defs
.lcp
.timeout
* hz
/ 1000;
5100 /* set VJ enable and IPv6 disable flags */
5102 if (spr
->defs
.enable_vj
)
5103 sp
->confflags
|= CONF_ENABLE_VJ
;
5105 sp
->confflags
&= ~CONF_ENABLE_VJ
;
5108 if (spr
->defs
.enable_ipv6
)
5109 sp
->confflags
|= CONF_ENABLE_IPV6
;
5111 sp
->confflags
&= ~CONF_ENABLE_IPV6
;
5126 sppp_phase_network(struct sppp
*sp
)
5132 sp
->pp_phase
= PHASE_NETWORK
;
5135 log(LOG_DEBUG
, SPP_FMT
"phase %s\n", SPP_ARGS(ifp
),
5136 sppp_phase_name(sp
->pp_phase
));
5138 /* Notify NCPs now. */
5139 for (i
= 0; i
< IDX_COUNT
; i
++)
5140 if ((cps
[i
])->flags
& CP_NCP
)
5143 /* Send Up events to all NCPs. */
5144 for (i
= 0, mask
= 1; i
< IDX_COUNT
; i
++, mask
<<= 1)
5145 if ((sp
->lcp
.protos
& mask
) && ((cps
[i
])->flags
& CP_NCP
))
5148 /* if no NCP is starting, all this was in vain, close down */
5149 sppp_lcp_check_and_close(sp
);
5154 sppp_cp_type_name(u_char type
)
5156 static char buf
[12];
5158 case CONF_REQ
: return "conf-req";
5159 case CONF_ACK
: return "conf-ack";
5160 case CONF_NAK
: return "conf-nak";
5161 case CONF_REJ
: return "conf-rej";
5162 case TERM_REQ
: return "term-req";
5163 case TERM_ACK
: return "term-ack";
5164 case CODE_REJ
: return "code-rej";
5165 case PROTO_REJ
: return "proto-rej";
5166 case ECHO_REQ
: return "echo-req";
5167 case ECHO_REPLY
: return "echo-reply";
5168 case DISC_REQ
: return "discard-req";
5170 ksnprintf (buf
, sizeof(buf
), "cp/0x%x", type
);
5175 sppp_auth_type_name(u_short proto
, u_char type
)
5177 static char buf
[12];
5181 case CHAP_CHALLENGE
: return "challenge";
5182 case CHAP_RESPONSE
: return "response";
5183 case CHAP_SUCCESS
: return "success";
5184 case CHAP_FAILURE
: return "failure";
5188 case PAP_REQ
: return "req";
5189 case PAP_ACK
: return "ack";
5190 case PAP_NAK
: return "nak";
5193 ksnprintf (buf
, sizeof(buf
), "auth/0x%x", type
);
5198 sppp_lcp_opt_name(u_char opt
)
5200 static char buf
[12];
5202 case LCP_OPT_MRU
: return "mru";
5203 case LCP_OPT_ASYNC_MAP
: return "async-map";
5204 case LCP_OPT_AUTH_PROTO
: return "auth-proto";
5205 case LCP_OPT_QUAL_PROTO
: return "qual-proto";
5206 case LCP_OPT_MAGIC
: return "magic";
5207 case LCP_OPT_PROTO_COMP
: return "proto-comp";
5208 case LCP_OPT_ADDR_COMP
: return "addr-comp";
5210 ksnprintf (buf
, sizeof(buf
), "lcp/0x%x", opt
);
5215 sppp_ipcp_opt_name(u_char opt
)
5217 static char buf
[12];
5219 case IPCP_OPT_ADDRESSES
: return "addresses";
5220 case IPCP_OPT_COMPRESSION
: return "compression";
5221 case IPCP_OPT_ADDRESS
: return "address";
5223 ksnprintf (buf
, sizeof(buf
), "ipcp/0x%x", opt
);
5229 sppp_ipv6cp_opt_name(u_char opt
)
5231 static char buf
[12];
5233 case IPV6CP_OPT_IFID
: return "ifid";
5234 case IPV6CP_OPT_COMPRESSION
: return "compression";
5236 ksprintf (buf
, "0x%x", opt
);
5242 sppp_state_name(int state
)
5245 case STATE_INITIAL
: return "initial";
5246 case STATE_STARTING
: return "starting";
5247 case STATE_CLOSED
: return "closed";
5248 case STATE_STOPPED
: return "stopped";
5249 case STATE_CLOSING
: return "closing";
5250 case STATE_STOPPING
: return "stopping";
5251 case STATE_REQ_SENT
: return "req-sent";
5252 case STATE_ACK_RCVD
: return "ack-rcvd";
5253 case STATE_ACK_SENT
: return "ack-sent";
5254 case STATE_OPENED
: return "opened";
5260 sppp_phase_name(enum ppp_phase phase
)
5263 case PHASE_DEAD
: return "dead";
5264 case PHASE_ESTABLISH
: return "establish";
5265 case PHASE_TERMINATE
: return "terminate";
5266 case PHASE_AUTHENTICATE
: return "authenticate";
5267 case PHASE_NETWORK
: return "network";
5273 sppp_proto_name(u_short proto
)
5275 static char buf
[12];
5277 case PPP_LCP
: return "lcp";
5278 case PPP_IPCP
: return "ipcp";
5279 case PPP_PAP
: return "pap";
5280 case PPP_CHAP
: return "chap";
5281 case PPP_IPV6CP
: return "ipv6cp";
5283 ksnprintf(buf
, sizeof(buf
), "proto/0x%x", (unsigned)proto
);
5288 sppp_print_bytes(const u_char
*p
, u_short len
)
5292 log(-1, " %s", hexncpy(p
, len
, hexstr
, HEX_NCPYLEN(len
), "-"));
5296 sppp_print_string(const char *p
, u_short len
)
5303 * Print only ASCII chars directly. RFC 1994 recommends
5304 * using only them, but we don't rely on it. */
5305 if (c
< ' ' || c
> '~')
5306 log(-1, "\\x%x", c
);
5313 sppp_dotted_quad(u_long addr
)
5316 ksprintf(s
, "%d.%d.%d.%d",
5317 (int)((addr
>> 24) & 0xff),
5318 (int)((addr
>> 16) & 0xff),
5319 (int)((addr
>> 8) & 0xff),
5320 (int)(addr
& 0xff));
5324 /* a dummy, used to drop uninteresting events */
5326 sppp_null(struct sppp
*unused
)
5328 /* do just nothing */