+++ /dev/null
-/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-/*
- * Synchronous PPP/Cisco link level subroutines.
- * Keepalive protocol implemented in both Cisco and PPP modes.
- *
- * Copyright (C) 1994-1996 Cronyx Engineering Ltd.
- * Author: Serge Vakulenko, <vak@cronyx.ru>
- *
- * Heavily revamped to conform to RFC 1661.
- * Copyright (C) 1997, Joerg Wunsch.
- *
- * This software is distributed with NO WARRANTIES, not even the implied
- * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * Authors grant any other persons or organisations permission to use
- * or modify this software as long as this message is kept with the software,
- * all derivative works or modified versions.
- *
- * From: Version 2.4, Thu Apr 30 17:17:21 MSD 1997
- *
- */
-
-#include <sys/param.h>
-
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
-#include "opt_inet.h"
-#include "opt_ipx.h"
-#endif
-
-#ifdef NetBSD1_3
-# if NetBSD1_3 > 6
-# include "opt_inet.h"
-# include "opt_iso.h"
-# endif
-#endif
-
-#include <sys/systm.h>
-#include <sys/kernel.h>
-#include <sys/sockio.h>
-#include <sys/socket.h>
-#include <sys/syslog.h>
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
-#include <machine/random.h>
-#endif
-#include <sys/malloc.h>
-#include <sys/mbuf.h>
-
-
-#if defined (__OpenBSD__)
-#include <sys/md5k.h>
-#else
-#include <sys/md5.h>
-#endif
-
-#include <net/if.h>
-#include <net/netisr.h>
-#include <net/if_types.h>
-#include <net/route.h>
-
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
-#include <machine/random.h>
-#endif
-#if defined (__NetBSD__) || defined (__OpenBSD__)
-#include <kern/cpu_number.h> /* XXX for softnet */
-#endif
-
-#include <machine/stdarg.h>
-
-#if INET
-#include <netinet/in.h>
-#include <netinet/in_systm.h>
-#include <netinet/in_var.h>
-#include <netinet/ip.h>
-#include <netinet/tcp.h>
-# if defined (__FreeBSD__) || defined (__OpenBSD__)
-# include <netinet/if_ether.h>
-# else
-# include <net/ethertypes.h>
-# endif
-#else
-# error Huh? sppp without INET?
-#endif
-
-#if IPX
-#include <netipx/ipx.h>
-#include <netipx/ipx_if.h>
-#endif
-
-#if NS
-#include <netns/ns.h>
-#include <netns/ns_if.h>
-#endif
-
-#if ISO
-#include <netiso/argo_debug.h>
-#include <netiso/iso.h>
-#include <netiso/iso_var.h>
-#include <netiso/iso_snpac.h>
-#endif
-
-#include <net/if_sppp.h>
-
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
-# define UNTIMEOUT(fun, arg, handle) untimeout(fun, arg, handle)
-# define TIMEOUT(fun, arg1, arg2, handle) handle = timeout(fun, arg1, arg2)
-# define IOCTL_CMD_T u_long
-#else
-# define UNTIMEOUT(fun, arg, handle) untimeout(fun, arg)
-# define TIMEOUT(fun, arg1, arg2, handle) timeout(fun, arg1, arg2)
-# define IOCTL_CMD_T int
-#endif
-
-#define MAXALIVECNT 3 /* max. alive packets */
-
-/*
- * Interface flags that can be set in an ifconfig command.
- *
- * Setting link0 will make the link passive, i.e. it will be marked
- * as being administrative openable, but won't be opened to begin
- * with. Incoming calls will be answered, or subsequent calls with
- * -link1 will cause the administrative open of the LCP layer.
- *
- * Setting link1 will cause the link to auto-dial only as packets
- * arrive to be sent.
- *
- * Setting IFF_DEBUG will syslog the option negotiation and state
- * transitions at level kern.debug. Note: all logs consistently look
- * like
- *
- * <if-name><unit>: <proto-name> <additional info...>
- *
- * with <if-name><unit> being something like "bppp0", and <proto-name>
- * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc.
- */
-
-#define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
-#define IFF_AUTO IFF_LINK1 /* auto-dial on output */
-
-#define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
-#define PPP_UI 0x03 /* Unnumbered Information */
-#define PPP_IP 0x0021 /* Internet Protocol */
-#define PPP_ISO 0x0023 /* ISO OSI Protocol */
-#define PPP_XNS 0x0025 /* Xerox NS Protocol */
-#define PPP_IPX 0x002b /* Novell IPX Protocol */
-#define PPP_LCP 0xc021 /* Link Control Protocol */
-#define PPP_PAP 0xc023 /* Password Authentication Protocol */
-#define PPP_CHAP 0xc223 /* Challenge-Handshake Auth Protocol */
-#define PPP_IPCP 0x8021 /* Internet Protocol Control Protocol */
-
-#define CONF_REQ 1 /* PPP configure request */
-#define CONF_ACK 2 /* PPP configure acknowledge */
-#define CONF_NAK 3 /* PPP configure negative ack */
-#define CONF_REJ 4 /* PPP configure reject */
-#define TERM_REQ 5 /* PPP terminate request */
-#define TERM_ACK 6 /* PPP terminate acknowledge */
-#define CODE_REJ 7 /* PPP code reject */
-#define PROTO_REJ 8 /* PPP protocol reject */
-#define ECHO_REQ 9 /* PPP echo request */
-#define ECHO_REPLY 10 /* PPP echo reply */
-#define DISC_REQ 11 /* PPP discard request */
-
-#define LCP_OPT_MRU 1 /* maximum receive unit */
-#define LCP_OPT_ASYNC_MAP 2 /* async control character map */
-#define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */
-#define LCP_OPT_QUAL_PROTO 4 /* quality protocol */
-#define LCP_OPT_MAGIC 5 /* magic number */
-#define LCP_OPT_RESERVED 6 /* reserved */
-#define LCP_OPT_PROTO_COMP 7 /* protocol field compression */
-#define LCP_OPT_ADDR_COMP 8 /* address/control field compression */
-
-#define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */
-#define IPCP_OPT_COMPRESSION 2 /* IP compression protocol (VJ) */
-#define IPCP_OPT_ADDRESS 3 /* local IP address */
-
-#define PAP_REQ 1 /* PAP name/password request */
-#define PAP_ACK 2 /* PAP acknowledge */
-#define PAP_NAK 3 /* PAP fail */
-
-#define CHAP_CHALLENGE 1 /* CHAP challenge request */
-#define CHAP_RESPONSE 2 /* CHAP challenge response */
-#define CHAP_SUCCESS 3 /* CHAP response ok */
-#define CHAP_FAILURE 4 /* CHAP response failed */
-
-#define CHAP_MD5 5 /* hash algorithm - MD5 */
-
-#define CISCO_MULTICAST 0x8f /* Cisco multicast address */
-#define CISCO_UNICAST 0x0f /* Cisco unicast address */
-#define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */
-#define CISCO_ADDR_REQ 0 /* Cisco address request */
-#define CISCO_ADDR_REPLY 1 /* Cisco address reply */
-#define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */
-
-/* states are named and numbered according to RFC 1661 */
-#define STATE_INITIAL 0
-#define STATE_STARTING 1
-#define STATE_CLOSED 2
-#define STATE_STOPPED 3
-#define STATE_CLOSING 4
-#define STATE_STOPPING 5
-#define STATE_REQ_SENT 6
-#define STATE_ACK_RCVD 7
-#define STATE_ACK_SENT 8
-#define STATE_OPENED 9
-
-struct ppp_header {
- u_char address;
- u_char control;
- u_short protocol;
-};
-#define PPP_HEADER_LEN sizeof (struct ppp_header)
-
-struct lcp_header {
- u_char type;
- u_char ident;
- u_short len;
-};
-#define LCP_HEADER_LEN sizeof (struct lcp_header)
-
-struct cisco_packet {
- u_long type;
- u_long par1;
- u_long par2;
- u_short rel;
- u_short time0;
- u_short time1;
-};
-#define CISCO_PACKET_LEN 18
-
-/*
- * We follow the spelling and capitalization of RFC 1661 here, to make
- * it easier comparing with the standard. Please refer to this RFC in
- * case you can't make sense out of these abbreviation; it will also
- * explain the semantics related to the various events and actions.
- */
-struct cp {
- u_short proto; /* PPP control protocol number */
- u_char protoidx; /* index into state table in struct sppp */
- u_char flags;
-#define CP_LCP 0x01 /* this is the LCP */
-#define CP_AUTH 0x02 /* this is an authentication protocol */
-#define CP_NCP 0x04 /* this is a NCP */
-#define CP_QUAL 0x08 /* this is a quality reporting protocol */
- const char *name; /* name of this control protocol */
- /* event handlers */
- void (*Up)(struct sppp *sp);
- void (*Down)(struct sppp *sp);
- void (*Open)(struct sppp *sp);
- void (*Close)(struct sppp *sp);
- void (*TO)(void *sp);
- int (*RCR)(struct sppp *sp, struct lcp_header *h, int len);
- void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len);
- void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len);
- /* actions */
- void (*tlu)(struct sppp *sp);
- void (*tld)(struct sppp *sp);
- void (*tls)(struct sppp *sp);
- void (*tlf)(struct sppp *sp);
- void (*scr)(struct sppp *sp);
-};
-
-static struct sppp *spppq;
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
-static struct callout_handle keepalive_ch;
-#endif
-
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
-#define SPP_FMT "%s%d: "
-#define SPP_ARGS(ifp) (ifp)->if_name, (ifp)->if_unit
-#else
-#define SPP_FMT "%s: "
-#define SPP_ARGS(ifp) (ifp)->if_xname
-#endif
-
-/*
- * The following disgusting hack gets around the problem that IP TOS
- * can't be set yet. We want to put "interactive" traffic on a high
- * priority queue. To decide if traffic is interactive, we check that
- * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control.
- *
- * XXX is this really still necessary? - joerg -
- */
-static u_short interactive_ports[8] = {
- 0, 513, 0, 0,
- 0, 21, 0, 23,
-};
-#define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p))
-
-/* almost every function needs these */
-#define STDDCL \
- struct ifnet *ifp = &sp->pp_if; \
- int debug = ifp->if_flags & IFF_DEBUG
-
-static int sppp_output(struct ifnet *ifp, struct mbuf *m,
- struct sockaddr *dst, struct rtentry *rt);
-
-static void sppp_cisco_send(struct sppp *sp, int type, long par1, long par2);
-static void sppp_cisco_input(struct sppp *sp, struct mbuf *m);
-
-static void sppp_cp_input(const struct cp *cp, struct sppp *sp,
- struct mbuf *m);
-static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type,
- u_char ident, u_short len, void *data);
-/* static void sppp_cp_timeout(void *arg); */
-static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp,
- int newstate);
-static void sppp_auth_send(const struct cp *cp,
- struct sppp *sp, unsigned int type, unsigned int id,
- ...);
-
-static void sppp_up_event(const struct cp *cp, struct sppp *sp);
-static void sppp_down_event(const struct cp *cp, struct sppp *sp);
-static void sppp_open_event(const struct cp *cp, struct sppp *sp);
-static void sppp_close_event(const struct cp *cp, struct sppp *sp);
-static void sppp_to_event(const struct cp *cp, struct sppp *sp);
-
-static void sppp_null(struct sppp *sp);
-
-static void sppp_lcp_init(struct sppp *sp);
-static void sppp_lcp_up(struct sppp *sp);
-static void sppp_lcp_down(struct sppp *sp);
-static void sppp_lcp_open(struct sppp *sp);
-static void sppp_lcp_close(struct sppp *sp);
-static void sppp_lcp_TO(void *sp);
-static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len);
-static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
-static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
-static void sppp_lcp_tlu(struct sppp *sp);
-static void sppp_lcp_tld(struct sppp *sp);
-static void sppp_lcp_tls(struct sppp *sp);
-static void sppp_lcp_tlf(struct sppp *sp);
-static void sppp_lcp_scr(struct sppp *sp);
-static void sppp_lcp_check_and_close(struct sppp *sp);
-static int sppp_ncp_check(struct sppp *sp);
-
-static void sppp_ipcp_init(struct sppp *sp);
-static void sppp_ipcp_up(struct sppp *sp);
-static void sppp_ipcp_down(struct sppp *sp);
-static void sppp_ipcp_open(struct sppp *sp);
-static void sppp_ipcp_close(struct sppp *sp);
-static void sppp_ipcp_TO(void *sp);
-static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len);
-static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
-static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
-static void sppp_ipcp_tlu(struct sppp *sp);
-static void sppp_ipcp_tld(struct sppp *sp);
-static void sppp_ipcp_tls(struct sppp *sp);
-static void sppp_ipcp_tlf(struct sppp *sp);
-static void sppp_ipcp_scr(struct sppp *sp);
-
-static void sppp_pap_input(struct sppp *sp, struct mbuf *m);
-static void sppp_pap_init(struct sppp *sp);
-static void sppp_pap_open(struct sppp *sp);
-static void sppp_pap_close(struct sppp *sp);
-static void sppp_pap_TO(void *sp);
-static void sppp_pap_my_TO(void *sp);
-static void sppp_pap_tlu(struct sppp *sp);
-static void sppp_pap_tld(struct sppp *sp);
-static void sppp_pap_scr(struct sppp *sp);
-
-static void sppp_chap_input(struct sppp *sp, struct mbuf *m);
-static void sppp_chap_init(struct sppp *sp);
-static void sppp_chap_open(struct sppp *sp);
-static void sppp_chap_close(struct sppp *sp);
-static void sppp_chap_TO(void *sp);
-static void sppp_chap_tlu(struct sppp *sp);
-static void sppp_chap_tld(struct sppp *sp);
-static void sppp_chap_scr(struct sppp *sp);
-
-static const char *sppp_auth_type_name(u_short proto, u_char type);
-static const char *sppp_cp_type_name(u_char type);
-static const char *sppp_dotted_quad(u_long addr);
-static const char *sppp_ipcp_opt_name(u_char opt);
-static const char *sppp_lcp_opt_name(u_char opt);
-static const char *sppp_phase_name(enum ppp_phase phase);
-static const char *sppp_proto_name(u_short proto);
-static const char *sppp_state_name(int state);
-static int sppp_params(struct sppp *sp, u_long cmd, void *data);
-static int sppp_strnlen(u_char *p, int max);
-static void sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst,
- u_long *srcmask);
-static void sppp_keepalive(void *dummy);
-static void sppp_phase_network(struct sppp *sp);
-static void sppp_print_bytes(const u_char *p, u_short len);
-static void sppp_print_string(const char *p, u_short len);
-static void sppp_qflush(struct ifqueue *ifq);
-static void sppp_set_ip_addr(struct sppp *sp, u_long src);
-
-/* our control protocol descriptors */
-static const struct cp lcp = {
- PPP_LCP, IDX_LCP, CP_LCP, "lcp",
- sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close,
- sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak,
- sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf,
- sppp_lcp_scr
-};
-
-static const struct cp ipcp = {
- PPP_IPCP, IDX_IPCP, CP_NCP, "ipcp",
- sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close,
- sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak,
- sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf,
- sppp_ipcp_scr
-};
-
-static const struct cp pap = {
- PPP_PAP, IDX_PAP, CP_AUTH, "pap",
- sppp_null, sppp_null, sppp_pap_open, sppp_pap_close,
- sppp_pap_TO, 0, 0, 0,
- sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null,
- sppp_pap_scr
-};
-
-static const struct cp chap = {
- PPP_CHAP, IDX_CHAP, CP_AUTH, "chap",
- sppp_null, sppp_null, sppp_chap_open, sppp_chap_close,
- sppp_chap_TO, 0, 0, 0,
- sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null,
- sppp_chap_scr
-};
-
-static const struct cp *cps[IDX_COUNT] = {
- &lcp, /* IDX_LCP */
- &ipcp, /* IDX_IPCP */
- &pap, /* IDX_PAP */
- &chap, /* IDX_CHAP */
-};
-
-
-\f/*
- * Exported functions, comprising our interface to the lower layer.
- */
-
-/*
- * Process the received packet.
- */
-void
-sppp_input(struct ifnet *ifp, struct mbuf *m)
-{
- struct ppp_header *h;
- struct ifqueue *inq = 0;
- int s;
- struct sppp *sp = (struct sppp *)ifp;
- int debug = ifp->if_flags & IFF_DEBUG;
-
- if (ifp->if_flags & IFF_UP)
- /* Count received bytes, add FCS and one flag */
- ifp->if_ibytes += m->m_pkthdr.len + 3;
-
- if (m->m_pkthdr.len <= PPP_HEADER_LEN) {
- /* Too small packet, drop it. */
- if (debug)
- log(LOG_DEBUG,
- SPP_FMT "input packet is too small, %d bytes\n",
- SPP_ARGS(ifp), m->m_pkthdr.len);
- drop:
- ++ifp->if_ierrors;
- ++ifp->if_iqdrops;
- m_freem (m);
- return;
- }
-
- /* Get PPP header. */
- h = mtod (m, struct ppp_header*);
- m_adj (m, PPP_HEADER_LEN);
-
- switch (h->address) {
- case PPP_ALLSTATIONS:
- if (h->control != PPP_UI)
- goto invalid;
- if (sp->pp_flags & PP_CISCO) {
- if (debug)
- log(LOG_DEBUG,
- SPP_FMT "PPP packet in Cisco mode "
- "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
- SPP_ARGS(ifp),
- h->address, h->control, ntohs(h->protocol));
- goto drop;
- }
- switch (ntohs (h->protocol)) {
- default:
- if (sp->state[IDX_LCP] == STATE_OPENED)
- sppp_cp_send (sp, PPP_LCP, PROTO_REJ,
- ++sp->pp_seq, m->m_pkthdr.len + 2,
- &h->protocol);
- if (debug)
- log(LOG_DEBUG,
- SPP_FMT "invalid input protocol "
- "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
- SPP_ARGS(ifp),
- h->address, h->control, ntohs(h->protocol));
- ++ifp->if_noproto;
- goto drop;
- case PPP_LCP:
- sppp_cp_input(&lcp, sp, m);
- m_freem (m);
- return;
- case PPP_PAP:
- if (sp->pp_phase >= PHASE_AUTHENTICATE)
- sppp_pap_input(sp, m);
- m_freem (m);
- return;
- case PPP_CHAP:
- if (sp->pp_phase >= PHASE_AUTHENTICATE)
- sppp_chap_input(sp, m);
- m_freem (m);
- return;
-#if INET
- case PPP_IPCP:
- if (sp->pp_phase == PHASE_NETWORK)
- sppp_cp_input(&ipcp, sp, m);
- m_freem (m);
- return;
- case PPP_IP:
- if (sp->state[IDX_IPCP] == STATE_OPENED) {
- schednetisr (NETISR_IP);
- inq = &ipintrq;
- }
- break;
-#endif
-#if IPX
- case PPP_IPX:
- /* IPX IPXCP not implemented yet */
- if (sp->pp_phase == PHASE_NETWORK) {
- schednetisr (NETISR_IPX);
- inq = &ipxintrq;
- }
- break;
-#endif
-#if NS
- case PPP_XNS:
- /* XNS IDPCP not implemented yet */
- if (sp->pp_phase == PHASE_NETWORK) {
- schednetisr (NETISR_NS);
- inq = &nsintrq;
- }
- break;
-#endif
-#if ISO
- case PPP_ISO:
- /* OSI NLCP not implemented yet */
- if (sp->pp_phase == PHASE_NETWORK) {
- schednetisr (NETISR_ISO);
- inq = &clnlintrq;
- }
- break;
-#endif
- }
- break;
- case CISCO_MULTICAST:
- case CISCO_UNICAST:
- /* Don't check the control field here (RFC 1547). */
- if (! (sp->pp_flags & PP_CISCO)) {
- if (debug)
- log(LOG_DEBUG,
- SPP_FMT "Cisco packet in PPP mode "
- "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
- SPP_ARGS(ifp),
- h->address, h->control, ntohs(h->protocol));
- goto drop;
- }
- switch (ntohs (h->protocol)) {
- default:
- ++ifp->if_noproto;
- goto invalid;
- case CISCO_KEEPALIVE:
- sppp_cisco_input ((struct sppp*) ifp, m);
- m_freem (m);
- return;
-#if INET
- case ETHERTYPE_IP:
- schednetisr (NETISR_IP);
- inq = &ipintrq;
- break;
-#endif
-#if IPX
- case ETHERTYPE_IPX:
- schednetisr (NETISR_IPX);
- inq = &ipxintrq;
- break;
-#endif
-#if NS
- case ETHERTYPE_NS:
- schednetisr (NETISR_NS);
- inq = &nsintrq;
- break;
-#endif
- }
- break;
- default: /* Invalid PPP packet. */
- invalid:
- if (debug)
- log(LOG_DEBUG,
- SPP_FMT "invalid input packet "
- "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
- SPP_ARGS(ifp),
- h->address, h->control, ntohs(h->protocol));
- goto drop;
- }
-
- if (! (ifp->if_flags & IFF_UP) || ! inq)
- goto drop;
-
- /* Check queue. */
- s = splimp();
- if (IF_QFULL (inq)) {
- /* Queue overflow. */
- IF_DROP(inq);
- splx(s);
- if (debug)
- log(LOG_DEBUG, SPP_FMT "protocol queue overflow\n",
- SPP_ARGS(ifp));
- goto drop;
- }
- IF_ENQUEUE(inq, m);
- splx(s);
-}
-
-/*
- * Enqueue transmit packet.
- */
-static int
-sppp_output(struct ifnet *ifp, struct mbuf *m,
- struct sockaddr *dst, struct rtentry *rt)
-{
- struct sppp *sp = (struct sppp*) ifp;
- struct ppp_header *h;
- struct ifqueue *ifq;
- int s, rv = 0;
- int debug = ifp->if_flags & IFF_DEBUG;
-
- s = splimp();
-
- if ((ifp->if_flags & IFF_UP) == 0 ||
- (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) {
- m_freem (m);
- splx (s);
- return (ENETDOWN);
- }
-
- if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) {
- /*
- * Interface is not yet running, but auto-dial. Need
- * to start LCP for it.
- */
- ifp->if_flags |= IFF_RUNNING;
- splx(s);
- lcp.Open(sp);
- s = splimp();
- }
-
- ifq = &ifp->if_snd;
-#if INET
- if (dst->sa_family == AF_INET) {
- /* XXX Check mbuf length here? */
- struct ip *ip = mtod (m, struct ip*);
- struct tcphdr *tcp = (struct tcphdr*) ((long*)ip + ip->ip_hl);
-
- /*
- * When using dynamic local IP address assignment by using
- * 0.0.0.0 as a local address, the first TCP session will
- * not connect because the local TCP checksum is computed
- * using 0.0.0.0 which will later become our real IP address
- * so the TCP checksum computed at the remote end will
- * become invalid. So we
- * - don't let packets with src ip addr 0 thru
- * - we flag TCP packets with src ip 0 as an error
- */
-
- if(ip->ip_src.s_addr == INADDR_ANY) /* -hm */
- {
- m_freem(m);
- splx(s);
- if(ip->ip_p == IPPROTO_TCP)
- return(EADDRNOTAVAIL);
- else
- return(0);
- }
-
- /*
- * Put low delay, telnet, rlogin and ftp control packets
- * in front of the queue.
- */
- if (IF_QFULL (&sp->pp_fastq))
- ;
- else if (ip->ip_tos & IPTOS_LOWDELAY)
- ifq = &sp->pp_fastq;
- else if (m->m_len < sizeof *ip + sizeof *tcp)
- ;
- else if (ip->ip_p != IPPROTO_TCP)
- ;
- else if (INTERACTIVE (ntohs (tcp->th_sport)))
- ifq = &sp->pp_fastq;
- else if (INTERACTIVE (ntohs (tcp->th_dport)))
- ifq = &sp->pp_fastq;
- }
-#endif
-
- /*
- * Prepend general data packet PPP header. For now, IP only.
- */
- M_PREPEND (m, PPP_HEADER_LEN, M_DONTWAIT);
- if (! m) {
- if (debug)
- log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n",
- SPP_ARGS(ifp));
- ++ifp->if_oerrors;
- splx (s);
- return (ENOBUFS);
- }
- /*
- * May want to check size of packet
- * (albeit due to the implementation it's always enough)
- */
- h = mtod (m, struct ppp_header*);
- if (sp->pp_flags & PP_CISCO) {
- h->address = CISCO_UNICAST; /* unicast address */
- h->control = 0;
- } else {
- h->address = PPP_ALLSTATIONS; /* broadcast address */
- h->control = PPP_UI; /* Unnumbered Info */
- }
-
- switch (dst->sa_family) {
-#if INET
- case AF_INET: /* Internet Protocol */
- if (sp->pp_flags & PP_CISCO)
- h->protocol = htons (ETHERTYPE_IP);
- else {
- /*
- * Don't choke with an ENETDOWN early. It's
- * possible that we just started dialing out,
- * so don't drop the packet immediately. If
- * we notice that we run out of buffer space
- * below, we will however remember that we are
- * not ready to carry IP packets, and return
- * ENETDOWN, as opposed to ENOBUFS.
- */
- h->protocol = htons(PPP_IP);
- if (sp->state[IDX_IPCP] != STATE_OPENED)
- rv = ENETDOWN;
- }
- break;
-#endif
-#if NS
- case AF_NS: /* Xerox NS Protocol */
- h->protocol = htons ((sp->pp_flags & PP_CISCO) ?
- ETHERTYPE_NS : PPP_XNS);
- break;
-#endif
-#if IPX
- case AF_IPX: /* Novell IPX Protocol */
- h->protocol = htons ((sp->pp_flags & PP_CISCO) ?
- ETHERTYPE_IPX : PPP_IPX);
- break;
-#endif
-#if ISO
- case AF_ISO: /* ISO OSI Protocol */
- if (sp->pp_flags & PP_CISCO)
- goto nosupport;
- h->protocol = htons (PPP_ISO);
- break;
-nosupport:
-#endif
- default:
- m_freem (m);
- ++ifp->if_oerrors;
- splx (s);
- return (EAFNOSUPPORT);
- }
-
- /*
- * Queue message on interface, and start output if interface
- * not yet active.
- */
- if (IF_QFULL (ifq)) {
- IF_DROP (&ifp->if_snd);
- m_freem (m);
- ++ifp->if_oerrors;
- splx (s);
- return (rv? rv: ENOBUFS);
- }
- IF_ENQUEUE (ifq, m);
- if (! (ifp->if_flags & IFF_OACTIVE))
- (*ifp->if_start) (ifp);
-
- /*
- * Count output packets and bytes.
- * The packet length includes header, FCS and 1 flag,
- * according to RFC 1333.
- */
- ifp->if_obytes += m->m_pkthdr.len + 3;
- splx (s);
- return (0);
-}
-
-void
-sppp_attach(struct ifnet *ifp)
-{
- struct sppp *sp = (struct sppp*) ifp;
-
- /* Initialize keepalive handler. */
- if (! spppq)
- TIMEOUT(sppp_keepalive, 0, hz * 10, keepalive_ch);
-
- /* Insert new entry into the keepalive list. */
- sp->pp_next = spppq;
- spppq = sp;
-
- sp->pp_if.if_mtu = PP_MTU;
- sp->pp_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
- sp->pp_if.if_type = IFT_PPP;
- sp->pp_if.if_output = sppp_output;
-#if 0
- sp->pp_flags = PP_KEEPALIVE;
-#endif
- sp->pp_fastq.ifq_maxlen = 32;
- sp->pp_cpq.ifq_maxlen = 20;
- sp->pp_loopcnt = 0;
- sp->pp_alivecnt = 0;
- sp->pp_seq = 0;
- sp->pp_rseq = 0;
- sp->pp_phase = PHASE_DEAD;
- sp->pp_up = lcp.Up;
- sp->pp_down = lcp.Down;
-
- sppp_lcp_init(sp);
- sppp_ipcp_init(sp);
- sppp_pap_init(sp);
- sppp_chap_init(sp);
-}
-
-void
-sppp_detach(struct ifnet *ifp)
-{
- struct sppp **q, *p, *sp = (struct sppp*) ifp;
- int i;
-
- /* Remove the entry from the keepalive list. */
- for (q = &spppq; (p = *q); q = &p->pp_next)
- if (p == sp) {
- *q = p->pp_next;
- break;
- }
-
- /* Stop keepalive handler. */
- if (! spppq)
- UNTIMEOUT(sppp_keepalive, 0, keepalive_ch);
-
- for (i = 0; i < IDX_COUNT; i++)
- UNTIMEOUT((cps[i])->TO, (void *)sp, sp->ch[i]);
- UNTIMEOUT(sppp_pap_my_TO, (void *)sp, sp->pap_my_to_ch);
-}
-
-/*
- * Flush the interface output queue.
- */
-void
-sppp_flush(struct ifnet *ifp)
-{
- struct sppp *sp = (struct sppp*) ifp;
-
- sppp_qflush (&sp->pp_if.if_snd);
- sppp_qflush (&sp->pp_fastq);
- sppp_qflush (&sp->pp_cpq);
-}
-
-/*
- * Check if the output queue is empty.
- */
-int
-sppp_isempty(struct ifnet *ifp)
-{
- struct sppp *sp = (struct sppp*) ifp;
- int empty, s;
-
- s = splimp();
- empty = !sp->pp_fastq.ifq_head && !sp->pp_cpq.ifq_head &&
- !sp->pp_if.if_snd.ifq_head;
- splx(s);
- return (empty);
-}
-
-/*
- * Get next packet to send.
- */
-struct mbuf *
-sppp_dequeue(struct ifnet *ifp)
-{
- struct sppp *sp = (struct sppp*) ifp;
- struct mbuf *m;
- int s;
-
- s = splimp();
- /*
- * Process only the control protocol queue until we have at
- * least one NCP open.
- *
- * Do always serve all three queues in Cisco mode.
- */
- IF_DEQUEUE(&sp->pp_cpq, m);
- if (m == NULL &&
- (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) {
- IF_DEQUEUE(&sp->pp_fastq, m);
- if (m == NULL)
- IF_DEQUEUE (&sp->pp_if.if_snd, m);
- }
- splx(s);
- return m;
-}
-
-/*
- * Pick the next packet, do not remove it from the queue.
- */
-struct mbuf *
-sppp_pick(struct ifnet *ifp)
-{
- struct sppp *sp = (struct sppp*)ifp;
- struct mbuf *m;
- int s;
-
- s= splimp ();
-
- m = sp->pp_cpq.ifq_head;
- if (m == NULL &&
- (sp->pp_phase == PHASE_NETWORK ||
- (sp->pp_flags & PP_CISCO) != 0))
- if ((m = sp->pp_fastq.ifq_head) == NULL)
- m = sp->pp_if.if_snd.ifq_head;
- splx (s);
- return (m);
-}
-
-/*
- * Process an ioctl request. Called on low priority level.
- */
-int
-sppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, void *data)
-{
- struct ifreq *ifr = (struct ifreq*) data;
- struct sppp *sp = (struct sppp*) ifp;
- int s, rv, going_up, going_down, newmode;
-
- s = splimp();
- rv = 0;
- switch (cmd) {
- case SIOCAIFADDR:
- case SIOCSIFDSTADDR:
- break;
-
- case SIOCSIFADDR:
- if_up(ifp);
- /* fall through... */
-
- case SIOCSIFFLAGS:
- going_up = ifp->if_flags & IFF_UP &&
- (ifp->if_flags & IFF_RUNNING) == 0;
- going_down = (ifp->if_flags & IFF_UP) == 0 &&
- ifp->if_flags & IFF_RUNNING;
- newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE);
- if (newmode == (IFF_AUTO | IFF_PASSIVE)) {
- /* sanity */
- newmode = IFF_PASSIVE;
- ifp->if_flags &= ~IFF_AUTO;
- }
-
- if (going_up || going_down)
- lcp.Close(sp);
- if (going_up && newmode == 0) {
- /* neither auto-dial nor passive */
- ifp->if_flags |= IFF_RUNNING;
- if (!(sp->pp_flags & PP_CISCO))
- lcp.Open(sp);
- } else if (going_down) {
- sppp_flush(ifp);
- ifp->if_flags &= ~IFF_RUNNING;
- }
-
- break;
-
-#ifdef SIOCSIFMTU
-#ifndef ifr_mtu
-#define ifr_mtu ifr_metric
-#endif
- case SIOCSIFMTU:
- if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru)
- return (EINVAL);
- ifp->if_mtu = ifr->ifr_mtu;
- break;
-#endif
-#ifdef SLIOCSETMTU
- case SLIOCSETMTU:
- if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru)
- return (EINVAL);
- ifp->if_mtu = *(short*)data;
- break;
-#endif
-#ifdef SIOCGIFMTU
- case SIOCGIFMTU:
- ifr->ifr_mtu = ifp->if_mtu;
- break;
-#endif
-#ifdef SLIOCGETMTU
- case SLIOCGETMTU:
- *(short*)data = ifp->if_mtu;
- break;
-#endif
- case SIOCADDMULTI:
- case SIOCDELMULTI:
- break;
-
- case SIOCGIFGENERIC:
- case SIOCSIFGENERIC:
- rv = sppp_params(sp, cmd, data);
- break;
-
- default:
- rv = ENOTTY;
- }
- splx(s);
- return rv;
-}
-
-
-\f/*
- * Cisco framing implementation.
- */
-
-/*
- * Handle incoming Cisco keepalive protocol packets.
- */
-static void
-sppp_cisco_input(struct sppp *sp, struct mbuf *m)
-{
- STDDCL;
- struct cisco_packet *h;
- u_long me, mymask;
-
- if (m->m_pkthdr.len < CISCO_PACKET_LEN) {
- if (debug)
- log(LOG_DEBUG,
- SPP_FMT "cisco invalid packet length: %d bytes\n",
- SPP_ARGS(ifp), m->m_pkthdr.len);
- return;
- }
- h = mtod (m, struct cisco_packet*);
- if (debug)
- log(LOG_DEBUG,
- SPP_FMT "cisco input: %d bytes "
- "<0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
- SPP_ARGS(ifp), m->m_pkthdr.len,
- (u_long)ntohl (h->type), (u_long)h->par1, (u_long)h->par2, (u_int)h->rel,
- (u_int)h->time0, (u_int)h->time1);
- switch (ntohl (h->type)) {
- default:
- if (debug)
- addlog(SPP_FMT "cisco unknown packet type: 0x%lx\n",
- SPP_ARGS(ifp), (u_long)ntohl (h->type));
- break;
- case CISCO_ADDR_REPLY:
- /* Reply on address request, ignore */
- break;
- case CISCO_KEEPALIVE_REQ:
- sp->pp_alivecnt = 0;
- sp->pp_rseq = ntohl (h->par1);
- if (sp->pp_seq == sp->pp_rseq) {
- /* Local and remote sequence numbers are equal.
- * Probably, the line is in loopback mode. */
- if (sp->pp_loopcnt >= MAXALIVECNT) {
- printf (SPP_FMT "loopback\n",
- SPP_ARGS(ifp));
- sp->pp_loopcnt = 0;
- if (ifp->if_flags & IFF_UP) {
- if_down (ifp);
- sppp_qflush (&sp->pp_cpq);
- }
- }
- ++sp->pp_loopcnt;
-
- /* Generate new local sequence number */
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
- sp->pp_seq = random();
-#else
- sp->pp_seq ^= time.tv_sec ^ time.tv_usec;
-#endif
- break;
- }
- sp->pp_loopcnt = 0;
- if (! (ifp->if_flags & IFF_UP) &&
- (ifp->if_flags & IFF_RUNNING)) {
- if_up(ifp);
- printf (SPP_FMT "up\n", SPP_ARGS(ifp));
- }
- break;
- case CISCO_ADDR_REQ:
- sppp_get_ip_addrs(sp, &me, 0, &mymask);
- if (me != 0L)
- sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask);
- break;
- }
-}
-
-/*
- * Send Cisco keepalive packet.
- */
-static void
-sppp_cisco_send(struct sppp *sp, int type, long par1, long par2)
-{
- STDDCL;
- struct ppp_header *h;
- struct cisco_packet *ch;
- struct mbuf *m;
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
- struct timeval tv;
-#else
- u_long t = (time.tv_sec - boottime.tv_sec) * 1000;
-#endif
-
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
- getmicrouptime(&tv);
-#endif
-
- MGETHDR (m, M_DONTWAIT, MT_DATA);
- if (! m)
- return;
- m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN;
- m->m_pkthdr.rcvif = 0;
-
- h = mtod (m, struct ppp_header*);
- h->address = CISCO_MULTICAST;
- h->control = 0;
- h->protocol = htons (CISCO_KEEPALIVE);
-
- ch = (struct cisco_packet*) (h + 1);
- ch->type = htonl (type);
- ch->par1 = htonl (par1);
- ch->par2 = htonl (par2);
- ch->rel = -1;
-
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
- ch->time0 = htons ((u_short) (tv.tv_sec >> 16));
- ch->time1 = htons ((u_short) tv.tv_sec);
-#else
- ch->time0 = htons ((u_short) (t >> 16));
- ch->time1 = htons ((u_short) t);
-#endif
-
- if (debug)
- log(LOG_DEBUG,
- SPP_FMT "cisco output: <0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
- SPP_ARGS(ifp), (u_long)ntohl (ch->type), (u_long)ch->par1,
- (u_long)ch->par2, (u_int)ch->rel, (u_int)ch->time0, (u_int)ch->time1);
-
- if (IF_QFULL (&sp->pp_cpq)) {
- IF_DROP (&sp->pp_fastq);
- IF_DROP (&ifp->if_snd);
- m_freem (m);
- } else
- IF_ENQUEUE (&sp->pp_cpq, m);
- if (! (ifp->if_flags & IFF_OACTIVE))
- (*ifp->if_start) (ifp);
- ifp->if_obytes += m->m_pkthdr.len + 3;
-}
-
-\f/*
- * PPP protocol implementation.
- */
-
-/*
- * Send PPP control protocol packet.
- */
-static void
-sppp_cp_send(struct sppp *sp, u_short proto, u_char type,
- u_char ident, u_short len, void *data)
-{
- STDDCL;
- struct ppp_header *h;
- struct lcp_header *lh;
- struct mbuf *m;
-
- if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN)
- len = MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN;
- MGETHDR (m, M_DONTWAIT, MT_DATA);
- if (! m)
- return;
- m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
- m->m_pkthdr.rcvif = 0;
-
- h = mtod (m, struct ppp_header*);
- h->address = PPP_ALLSTATIONS; /* broadcast address */
- h->control = PPP_UI; /* Unnumbered Info */
- h->protocol = htons (proto); /* Link Control Protocol */
-
- lh = (struct lcp_header*) (h + 1);
- lh->type = type;
- lh->ident = ident;
- lh->len = htons (LCP_HEADER_LEN + len);
- if (len)
- bcopy (data, lh+1, len);
-
- if (debug) {
- log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
- SPP_ARGS(ifp),
- sppp_proto_name(proto),
- sppp_cp_type_name (lh->type), lh->ident,
- ntohs (lh->len));
- if (len)
- sppp_print_bytes ((u_char*) (lh+1), len);
- addlog(">\n");
- }
- if (IF_QFULL (&sp->pp_cpq)) {
- IF_DROP (&sp->pp_fastq);
- IF_DROP (&ifp->if_snd);
- m_freem (m);
- ++ifp->if_oerrors;
- } else
- IF_ENQUEUE (&sp->pp_cpq, m);
- if (! (ifp->if_flags & IFF_OACTIVE))
- (*ifp->if_start) (ifp);
- ifp->if_obytes += m->m_pkthdr.len + 3;
-}
-
-/*
- * Handle incoming PPP control protocol packets.
- */
-static void
-sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m)
-{
- STDDCL;
- struct lcp_header *h;
- int len = m->m_pkthdr.len;
- int rv;
- u_char *p;
-
- if (len < 4) {
- if (debug)
- log(LOG_DEBUG,
- SPP_FMT "%s invalid packet length: %d bytes\n",
- SPP_ARGS(ifp), cp->name, len);
- return;
- }
- h = mtod (m, struct lcp_header*);
- if (debug) {
- log(LOG_DEBUG,
- SPP_FMT "%s input(%s): <%s id=0x%x len=%d",
- SPP_ARGS(ifp), cp->name,
- sppp_state_name(sp->state[cp->protoidx]),
- sppp_cp_type_name (h->type), h->ident, ntohs (h->len));
- if (len > 4)
- sppp_print_bytes ((u_char*) (h+1), len-4);
- addlog(">\n");
- }
- if (len > ntohs (h->len))
- len = ntohs (h->len);
- p = (u_char *)(h + 1);
- switch (h->type) {
- case CONF_REQ:
- if (len < 4) {
- if (debug)
- addlog(SPP_FMT "%s invalid conf-req length %d\n",
- SPP_ARGS(ifp), cp->name,
- len);
- ++ifp->if_ierrors;
- break;
- }
- /* handle states where RCR doesn't get a SCA/SCN */
- switch (sp->state[cp->protoidx]) {
- case STATE_CLOSING:
- case STATE_STOPPING:
- return;
- case STATE_CLOSED:
- sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident,
- 0, 0);
- return;
- }
- rv = (cp->RCR)(sp, h, len);
- switch (sp->state[cp->protoidx]) {
- case STATE_OPENED:
- (cp->tld)(sp);
- (cp->scr)(sp);
- /* fall through... */
- case STATE_ACK_SENT:
- case STATE_REQ_SENT:
- sppp_cp_change_state(cp, sp, rv?
- STATE_ACK_SENT: STATE_REQ_SENT);
- break;
- case STATE_STOPPED:
- sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
- (cp->scr)(sp);
- sppp_cp_change_state(cp, sp, rv?
- STATE_ACK_SENT: STATE_REQ_SENT);
- break;
- case STATE_ACK_RCVD:
- if (rv) {
- sppp_cp_change_state(cp, sp, STATE_OPENED);
- if (debug)
- log(LOG_DEBUG, SPP_FMT "%s tlu\n",
- SPP_ARGS(ifp),
- cp->name);
- (cp->tlu)(sp);
- } else
- sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
- break;
- default:
- printf(SPP_FMT "%s illegal %s in state %s\n",
- SPP_ARGS(ifp), cp->name,
- sppp_cp_type_name(h->type),
- sppp_state_name(sp->state[cp->protoidx]));
- ++ifp->if_ierrors;
- }
- break;
- case CONF_ACK:
- if (h->ident != sp->confid[cp->protoidx]) {
- if (debug)
- addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
- SPP_ARGS(ifp), cp->name,
- h->ident, sp->confid[cp->protoidx]);
- ++ifp->if_ierrors;
- break;
- }
- switch (sp->state[cp->protoidx]) {
- case STATE_CLOSED:
- case STATE_STOPPED:
- sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
- break;
- case STATE_CLOSING:
- case STATE_STOPPING:
- break;
- case STATE_REQ_SENT:
- sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
- sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
- break;
- case STATE_OPENED:
- (cp->tld)(sp);
- /* fall through */
- case STATE_ACK_RCVD:
- (cp->scr)(sp);
- sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
- break;
- case STATE_ACK_SENT:
- sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
- sppp_cp_change_state(cp, sp, STATE_OPENED);
- if (debug)
- log(LOG_DEBUG, SPP_FMT "%s tlu\n",
- SPP_ARGS(ifp), cp->name);
- (cp->tlu)(sp);
- break;
- default:
- printf(SPP_FMT "%s illegal %s in state %s\n",
- SPP_ARGS(ifp), cp->name,
- sppp_cp_type_name(h->type),
- sppp_state_name(sp->state[cp->protoidx]));
- ++ifp->if_ierrors;
- }
- break;
- case CONF_NAK:
- case CONF_REJ:
- if (h->ident != sp->confid[cp->protoidx]) {
- if (debug)
- addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
- SPP_ARGS(ifp), cp->name,
- h->ident, sp->confid[cp->protoidx]);
- ++ifp->if_ierrors;
- break;
- }
- if (h->type == CONF_NAK)
- (cp->RCN_nak)(sp, h, len);
- else /* CONF_REJ */
- (cp->RCN_rej)(sp, h, len);
-
- switch (sp->state[cp->protoidx]) {
- case STATE_CLOSED:
- case STATE_STOPPED:
- sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
- break;
- case STATE_REQ_SENT:
- case STATE_ACK_SENT:
- sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
- (cp->scr)(sp);
- break;
- case STATE_OPENED:
- (cp->tld)(sp);
- /* fall through */
- case STATE_ACK_RCVD:
- sppp_cp_change_state(cp, sp, STATE_ACK_SENT);
- (cp->scr)(sp);
- break;
- case STATE_CLOSING:
- case STATE_STOPPING:
- break;
- default:
- printf(SPP_FMT "%s illegal %s in state %s\n",
- SPP_ARGS(ifp), cp->name,
- sppp_cp_type_name(h->type),
- sppp_state_name(sp->state[cp->protoidx]));
- ++ifp->if_ierrors;
- }
- break;
-
- case TERM_REQ:
- switch (sp->state[cp->protoidx]) {
- case STATE_ACK_RCVD:
- case STATE_ACK_SENT:
- sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
- /* fall through */
- case STATE_CLOSED:
- case STATE_STOPPED:
- case STATE_CLOSING:
- case STATE_STOPPING:
- case STATE_REQ_SENT:
- sta:
- /* Send Terminate-Ack packet. */
- if (debug)
- log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n",
- SPP_ARGS(ifp), cp->name);
- sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
- break;
- case STATE_OPENED:
- (cp->tld)(sp);
- sp->rst_counter[cp->protoidx] = 0;
- sppp_cp_change_state(cp, sp, STATE_STOPPING);
- goto sta;
- break;
- default:
- printf(SPP_FMT "%s illegal %s in state %s\n",
- SPP_ARGS(ifp), cp->name,
- sppp_cp_type_name(h->type),
- sppp_state_name(sp->state[cp->protoidx]));
- ++ifp->if_ierrors;
- }
- break;
- case TERM_ACK:
- switch (sp->state[cp->protoidx]) {
- case STATE_CLOSED:
- case STATE_STOPPED:
- case STATE_REQ_SENT:
- case STATE_ACK_SENT:
- break;
- case STATE_CLOSING:
- sppp_cp_change_state(cp, sp, STATE_CLOSED);
- (cp->tlf)(sp);
- break;
- case STATE_STOPPING:
- sppp_cp_change_state(cp, sp, STATE_STOPPED);
- (cp->tlf)(sp);
- break;
- case STATE_ACK_RCVD:
- sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
- break;
- case STATE_OPENED:
- (cp->tld)(sp);
- (cp->scr)(sp);
- sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
- break;
- default:
- printf(SPP_FMT "%s illegal %s in state %s\n",
- SPP_ARGS(ifp), cp->name,
- sppp_cp_type_name(h->type),
- sppp_state_name(sp->state[cp->protoidx]));
- ++ifp->if_ierrors;
- }
- break;
- case CODE_REJ:
- case PROTO_REJ:
- /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
- log(LOG_INFO,
- SPP_FMT "%s: ignoring RXJ (%s) for proto 0x%x, "
- "danger will robinson\n",
- SPP_ARGS(ifp), cp->name,
- sppp_cp_type_name(h->type), ntohs(*((u_short *)p)));
- switch (sp->state[cp->protoidx]) {
- case STATE_CLOSED:
- case STATE_STOPPED:
- case STATE_REQ_SENT:
- case STATE_ACK_SENT:
- case STATE_CLOSING:
- case STATE_STOPPING:
- case STATE_OPENED:
- break;
- case STATE_ACK_RCVD:
- sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
- break;
- default:
- printf(SPP_FMT "%s illegal %s in state %s\n",
- SPP_ARGS(ifp), cp->name,
- sppp_cp_type_name(h->type),
- sppp_state_name(sp->state[cp->protoidx]));
- ++ifp->if_ierrors;
- }
- break;
- case DISC_REQ:
- if (cp->proto != PPP_LCP)
- goto illegal;
- /* Discard the packet. */
- break;
- case ECHO_REQ:
- if (cp->proto != PPP_LCP)
- goto illegal;
- if (sp->state[cp->protoidx] != STATE_OPENED) {
- if (debug)
- addlog(SPP_FMT "lcp echo req but lcp closed\n",
- SPP_ARGS(ifp));
- ++ifp->if_ierrors;
- break;
- }
- if (len < 8) {
- if (debug)
- addlog(SPP_FMT "invalid lcp echo request "
- "packet length: %d bytes\n",
- SPP_ARGS(ifp), len);
- break;
- }
- if (ntohl (*(long*)(h+1)) == sp->lcp.magic) {
- /* Line loopback mode detected. */
- printf(SPP_FMT "loopback\n", SPP_ARGS(ifp));
- if_down (ifp);
- sppp_qflush (&sp->pp_cpq);
-
- /* Shut down the PPP link. */
- /* XXX */
- lcp.Down(sp);
- lcp.Up(sp);
- break;
- }
- *(long*)(h+1) = htonl (sp->lcp.magic);
- if (debug)
- addlog(SPP_FMT "got lcp echo req, sending echo rep\n",
- SPP_ARGS(ifp));
- sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1);
- break;
- case ECHO_REPLY:
- if (cp->proto != PPP_LCP)
- goto illegal;
- if (h->ident != sp->lcp.echoid) {
- ++ifp->if_ierrors;
- break;
- }
- if (len < 8) {
- if (debug)
- addlog(SPP_FMT "lcp invalid echo reply "
- "packet length: %d bytes\n",
- SPP_ARGS(ifp), len);
- break;
- }
- if (debug)
- addlog(SPP_FMT "lcp got echo rep\n",
- SPP_ARGS(ifp));
- if (ntohl (*(long*)(h+1)) != sp->lcp.magic)
- sp->pp_alivecnt = 0;
- break;
- default:
- /* Unknown packet type -- send Code-Reject packet. */
- illegal:
- if (debug)
- addlog(SPP_FMT "%s send code-rej for 0x%x\n",
- SPP_ARGS(ifp), cp->name, h->type);
- sppp_cp_send(sp, cp->proto, CODE_REJ, ++sp->pp_seq,
- m->m_pkthdr.len, h);
- ++ifp->if_ierrors;
- }
-}
-
-
-/*
- * The generic part of all Up/Down/Open/Close/TO event handlers.
- * Basically, the state transition handling in the automaton.
- */
-static void
-sppp_up_event(const struct cp *cp, struct sppp *sp)
-{
- STDDCL;
-
- if (debug)
- log(LOG_DEBUG, SPP_FMT "%s up(%s)\n",
- SPP_ARGS(ifp), cp->name,
- sppp_state_name(sp->state[cp->protoidx]));
-
- switch (sp->state[cp->protoidx]) {
- case STATE_INITIAL:
- sppp_cp_change_state(cp, sp, STATE_CLOSED);
- break;
- case STATE_STARTING:
- sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
- (cp->scr)(sp);
- sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
- break;
- default:
- printf(SPP_FMT "%s illegal up in state %s\n",
- SPP_ARGS(ifp), cp->name,
- sppp_state_name(sp->state[cp->protoidx]));
- }
-}
-
-static void
-sppp_down_event(const struct cp *cp, struct sppp *sp)
-{
- STDDCL;
-
- if (debug)
- log(LOG_DEBUG, SPP_FMT "%s down(%s)\n",
- SPP_ARGS(ifp), cp->name,
- sppp_state_name(sp->state[cp->protoidx]));
-
- switch (sp->state[cp->protoidx]) {
- case STATE_CLOSED:
- case STATE_CLOSING:
- sppp_cp_change_state(cp, sp, STATE_INITIAL);
- break;
- case STATE_STOPPED:
- sppp_cp_change_state(cp, sp, STATE_STARTING);
- (cp->tls)(sp);
- break;
- case STATE_STOPPING:
- case STATE_REQ_SENT:
- case STATE_ACK_RCVD:
- case STATE_ACK_SENT:
- sppp_cp_change_state(cp, sp, STATE_STARTING);
- break;
- case STATE_OPENED:
- (cp->tld)(sp);
- sppp_cp_change_state(cp, sp, STATE_STARTING);
- break;
- default:
- printf(SPP_FMT "%s illegal down in state %s\n",
- SPP_ARGS(ifp), cp->name,
- sppp_state_name(sp->state[cp->protoidx]));
- }
-}
-
-
-static void
-sppp_open_event(const struct cp *cp, struct sppp *sp)
-{
- STDDCL;
-
- if (debug)
- log(LOG_DEBUG, SPP_FMT "%s open(%s)\n",
- SPP_ARGS(ifp), cp->name,
- sppp_state_name(sp->state[cp->protoidx]));
-
- switch (sp->state[cp->protoidx]) {
- case STATE_INITIAL:
- sppp_cp_change_state(cp, sp, STATE_STARTING);
- (cp->tls)(sp);
- break;
- case STATE_STARTING:
- break;
- case STATE_CLOSED:
- sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
- (cp->scr)(sp);
- sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
- break;
- case STATE_STOPPED:
- case STATE_STOPPING:
- case STATE_REQ_SENT:
- case STATE_ACK_RCVD:
- case STATE_ACK_SENT:
- case STATE_OPENED:
- break;
- case STATE_CLOSING:
- sppp_cp_change_state(cp, sp, STATE_STOPPING);
- break;
- }
-}
-
-
-static void
-sppp_close_event(const struct cp *cp, struct sppp *sp)
-{
- STDDCL;
-
- if (debug)
- log(LOG_DEBUG, SPP_FMT "%s close(%s)\n",
- SPP_ARGS(ifp), cp->name,
- sppp_state_name(sp->state[cp->protoidx]));
-
- switch (sp->state[cp->protoidx]) {
- case STATE_INITIAL:
- case STATE_CLOSED:
- case STATE_CLOSING:
- break;
- case STATE_STARTING:
- sppp_cp_change_state(cp, sp, STATE_INITIAL);
- (cp->tlf)(sp);
- break;
- case STATE_STOPPED:
- sppp_cp_change_state(cp, sp, STATE_CLOSED);
- break;
- case STATE_STOPPING:
- sppp_cp_change_state(cp, sp, STATE_CLOSING);
- break;
- case STATE_OPENED:
- (cp->tld)(sp);
- /* fall through */
- case STATE_REQ_SENT:
- case STATE_ACK_RCVD:
- case STATE_ACK_SENT:
- sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate;
- sppp_cp_send(sp, cp->proto, TERM_REQ, ++sp->pp_seq, 0, 0);
- sppp_cp_change_state(cp, sp, STATE_CLOSING);
- break;
- }
-}
-
-static void
-sppp_to_event(const struct cp *cp, struct sppp *sp)
-{
- STDDCL;
- int s;
-
- s = splimp();
- if (debug)
- log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n",
- SPP_ARGS(ifp), cp->name,
- sppp_state_name(sp->state[cp->protoidx]),
- sp->rst_counter[cp->protoidx]);
-
- if (--sp->rst_counter[cp->protoidx] < 0)
- /* TO- event */
- switch (sp->state[cp->protoidx]) {
- case STATE_CLOSING:
- sppp_cp_change_state(cp, sp, STATE_CLOSED);
- (cp->tlf)(sp);
- break;
- case STATE_STOPPING:
- sppp_cp_change_state(cp, sp, STATE_STOPPED);
- (cp->tlf)(sp);
- break;
- case STATE_REQ_SENT:
- case STATE_ACK_RCVD:
- case STATE_ACK_SENT:
- sppp_cp_change_state(cp, sp, STATE_STOPPED);
- (cp->tlf)(sp);
- break;
- }
- else
- /* TO+ event */
- switch (sp->state[cp->protoidx]) {
- case STATE_CLOSING:
- case STATE_STOPPING:
- sppp_cp_send(sp, cp->proto, TERM_REQ, ++sp->pp_seq,
- 0, 0);
- TIMEOUT(cp->TO, (void *)sp, sp->lcp.timeout,
- sp->ch[cp->protoidx]);
- break;
- case STATE_REQ_SENT:
- case STATE_ACK_RCVD:
- (cp->scr)(sp);
- /* sppp_cp_change_state() will restart the timer */
- sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
- break;
- case STATE_ACK_SENT:
- (cp->scr)(sp);
- TIMEOUT(cp->TO, (void *)sp, sp->lcp.timeout,
- sp->ch[cp->protoidx]);
- break;
- }
-
- splx(s);
-}
-
-/*
- * Change the state of a control protocol in the state automaton.
- * Takes care of starting/stopping the restart timer.
- */
-void
-sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate)
-{
- sp->state[cp->protoidx] = newstate;
-
- UNTIMEOUT(cp->TO, (void *)sp, sp->ch[cp->protoidx]);
- switch (newstate) {
- case STATE_INITIAL:
- case STATE_STARTING:
- case STATE_CLOSED:
- case STATE_STOPPED:
- case STATE_OPENED:
- break;
- case STATE_CLOSING:
- case STATE_STOPPING:
- case STATE_REQ_SENT:
- case STATE_ACK_RCVD:
- case STATE_ACK_SENT:
- TIMEOUT(cp->TO, (void *)sp, sp->lcp.timeout,
- sp->ch[cp->protoidx]);
- break;
- }
-}
-\f/*
- *--------------------------------------------------------------------------*
- * *
- * The LCP implementation. *
- * *
- *--------------------------------------------------------------------------*
- */
-static void
-sppp_lcp_init(struct sppp *sp)
-{
- sp->lcp.opts = (1 << LCP_OPT_MAGIC);
- sp->lcp.magic = 0;
- sp->state[IDX_LCP] = STATE_INITIAL;
- sp->fail_counter[IDX_LCP] = 0;
- sp->lcp.protos = 0;
- sp->lcp.mru = sp->lcp.their_mru = PP_MTU;
-
- /*
- * Initialize counters and timeout values. Note that we don't
- * use the 3 seconds suggested in RFC 1661 since we are likely
- * running on a fast link. XXX We should probably implement
- * the exponential backoff option. Note that these values are
- * relevant for all control protocols, not just LCP only.
- */
- sp->lcp.timeout = 1 * hz;
- sp->lcp.max_terminate = 2;
- sp->lcp.max_configure = 10;
- sp->lcp.max_failure = 10;
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
- callout_handle_init(&sp->ch[IDX_LCP]);
-#endif
-}
-
-static void
-sppp_lcp_up(struct sppp *sp)
-{
- STDDCL;
-
- /*
- * If this interface is passive or dial-on-demand, and we are
- * still in Initial state, it means we've got an incoming
- * call. Activate the interface.
- */
- if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) {
- if (debug)
- log(LOG_DEBUG,
- SPP_FMT "Up event", SPP_ARGS(ifp));
- ifp->if_flags |= IFF_RUNNING;
- if (sp->state[IDX_LCP] == STATE_INITIAL) {
- if (debug)
- addlog("(incoming call)\n");
- sp->pp_flags |= PP_CALLIN;
- lcp.Open(sp);
- } else if (debug)
- addlog("\n");
- }
-
- sppp_up_event(&lcp, sp);
-}
-
-static void
-sppp_lcp_down(struct sppp *sp)
-{
- STDDCL;
-
- sppp_down_event(&lcp, sp);
-
- /*
- * If this is neither a dial-on-demand nor a passive
- * interface, simulate an ``ifconfig down'' action, so the
- * administrator can force a redial by another ``ifconfig
- * up''. XXX For leased line operation, should we immediately
- * try to reopen the connection here?
- */
- if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) {
- log(LOG_INFO,
- SPP_FMT "Down event, taking interface down.\n",
- SPP_ARGS(ifp));
- if_down(ifp);
- } else {
- if (debug)
- log(LOG_DEBUG,
- SPP_FMT "Down event (carrier loss)\n",
- SPP_ARGS(ifp));
- }
- sp->pp_flags &= ~PP_CALLIN;
- if (sp->state[IDX_LCP] != STATE_INITIAL)
- lcp.Close(sp);
- ifp->if_flags &= ~IFF_RUNNING;
-}
-
-static void
-sppp_lcp_open(struct sppp *sp)
-{
- /*
- * If we are authenticator, negotiate LCP_AUTH
- */
- if (sp->hisauth.proto != 0)
- sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO);
- else
- sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
- sp->pp_flags &= ~PP_NEEDAUTH;
- sppp_open_event(&lcp, sp);
-}
-
-static void
-sppp_lcp_close(struct sppp *sp)
-{
- sppp_close_event(&lcp, sp);
-}
-
-static void
-sppp_lcp_TO(void *cookie)
-{
- sppp_to_event(&lcp, (struct sppp *)cookie);
-}
-
-/*
- * Analyze a configure request. Return true if it was agreeable, and
- * caused action sca, false if it has been rejected or nak'ed, and
- * caused action scn. (The return value is used to make the state
- * transition decision in the state automaton.)
- */
-static int
-sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
-{
- STDDCL;
- u_char *buf, *r, *p;
- int origlen, rlen;
- u_long nmagic;
- u_short authproto;
-
- len -= 4;
- origlen = len;
- buf = r = _MALLOC(len, M_TEMP, M_WAITOK);
- if (! buf)
- return (0);
-
- if (debug)
- log(LOG_DEBUG, SPP_FMT "lcp parse opts: ",
- SPP_ARGS(ifp));
-
- /* pass 1: check for things that need to be rejected */
- p = (void*) (h+1);
- for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
- if (debug)
- addlog(" %s ", sppp_lcp_opt_name(*p));
- switch (*p) {
- case LCP_OPT_MAGIC:
- /* Magic number. */
- /* fall through, both are same length */
- case LCP_OPT_ASYNC_MAP:
- /* Async control character map. */
- if (len >= 6 || p[1] == 6)
- continue;
- if (debug)
- addlog("[invalid] ");
- break;
- case LCP_OPT_MRU:
- /* Maximum receive unit. */
- if (len >= 4 && p[1] == 4)
- continue;
- if (debug)
- addlog("[invalid] ");
- break;
- case LCP_OPT_AUTH_PROTO:
- if (len < 4) {
- if (debug)
- addlog("[invalid] ");
- break;
- }
- authproto = (p[2] << 8) + p[3];
- if (authproto == PPP_CHAP && p[1] != 5) {
- if (debug)
- addlog("[invalid chap len] ");
- break;
- }
- if (sp->myauth.proto == 0) {
- /* we are not configured to do auth */
- if (debug)
- addlog("[not configured] ");
- break;
- }
- /*
- * Remote want us to authenticate, remember this,
- * so we stay in PHASE_AUTHENTICATE after LCP got
- * up.
- */
- sp->pp_flags |= PP_NEEDAUTH;
- continue;
- default:
- /* Others not supported. */
- if (debug)
- addlog("[rej] ");
- break;
- }
- /* Add the option to rejected list. */
- bcopy (p, r, p[1]);
- r += p[1];
- rlen += p[1];
- }
- if (rlen) {
- if (debug)
- addlog(" send conf-rej\n");
- sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
- return 0;
- } else if (debug)
- addlog("\n");
-
- /*
- * pass 2: check for option values that are unacceptable and
- * thus require to be nak'ed.
- */
- if (debug)
- log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ",
- SPP_ARGS(ifp));
-
- p = (void*) (h+1);
- len = origlen;
- for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
- if (debug)
- addlog(" %s ", sppp_lcp_opt_name(*p));
- switch (*p) {
- case LCP_OPT_MAGIC:
- /* Magic number -- extract. */
- nmagic = (u_long)p[2] << 24 |
- (u_long)p[3] << 16 | p[4] << 8 | p[5];
- if (nmagic != sp->lcp.magic) {
- if (debug)
- addlog("0x%lx ", nmagic);
- continue;
- }
- /*
- * Local and remote magics equal -- loopback?
- */
- if (sp->pp_loopcnt >= MAXALIVECNT*5) {
- printf (SPP_FMT "loopback\n",
- SPP_ARGS(ifp));
- sp->pp_loopcnt = 0;
- if (ifp->if_flags & IFF_UP) {
- if_down(ifp);
- sppp_qflush(&sp->pp_cpq);
- /* XXX ? */
- lcp.Down(sp);
- lcp.Up(sp);
- }
- } else if (debug)
- addlog("[glitch] ");
- ++sp->pp_loopcnt;
- /*
- * We negate our magic here, and NAK it. If
- * we see it later in an NAK packet, we
- * suggest a new one.
- */
- nmagic = ~sp->lcp.magic;
- /* Gonna NAK it. */
- p[2] = nmagic >> 24;
- p[3] = nmagic >> 16;
- p[4] = nmagic >> 8;
- p[5] = nmagic;
- break;
-
- case LCP_OPT_ASYNC_MAP:
- /* Async control character map -- check to be zero. */
- if (! p[2] && ! p[3] && ! p[4] && ! p[5]) {
- if (debug)
- addlog("[empty] ");
- continue;
- }
- if (debug)
- addlog("[non-empty] ");
- /* suggest a zero one */
- p[2] = p[3] = p[4] = p[5] = 0;
- break;
-
- case LCP_OPT_MRU:
- /*
- * Maximum receive unit. Always agreeable,
- * but ignored by now.
- */
- sp->lcp.their_mru = p[2] * 256 + p[3];
- if (debug)
- addlog("%lu ", sp->lcp.their_mru);
- continue;
-
- case LCP_OPT_AUTH_PROTO:
- authproto = (p[2] << 8) + p[3];
- if (sp->myauth.proto != authproto) {
- /* not agreed, nak */
- if (debug)
- addlog("[mine %s != his %s] ",
- sppp_proto_name(sp->hisauth.proto),
- sppp_proto_name(authproto));
- p[2] = sp->myauth.proto >> 8;
- p[3] = sp->myauth.proto;
- break;
- }
- if (authproto == PPP_CHAP && p[4] != CHAP_MD5) {
- if (debug)
- addlog("[chap not MD5] ");
- p[4] = CHAP_MD5;
- break;
- }
- continue;
- }
- /* Add the option to nak'ed list. */
- bcopy (p, r, p[1]);
- r += p[1];
- rlen += p[1];
- }
- if (rlen) {
- if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) {
- if (debug)
- addlog(" max_failure (%d) exceeded, "
- "send conf-rej\n",
- sp->lcp.max_failure);
- sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
- } else {
- if (debug)
- addlog(" send conf-nak\n");
- sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf);
- }
- return 0;
- } else {
- if (debug)
- addlog(" send conf-ack\n");
- sp->fail_counter[IDX_LCP] = 0;
- sp->pp_loopcnt = 0;
- sppp_cp_send (sp, PPP_LCP, CONF_ACK,
- h->ident, origlen, h+1);
- }
-
- FREE(buf, M_TEMP);
- return (rlen == 0);
-}
-
-/*
- * Analyze the LCP Configure-Reject option list, and adjust our
- * negotiation.
- */
-static void
-sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
-{
- STDDCL;
- u_char *buf, *p;
-
- len -= 4;
- buf = MALLOC (len, M_TEMP, M_WAITOK);
- if (!buf)
- return;
-
- if (debug)
- log(LOG_DEBUG, SPP_FMT "lcp rej opts: ",
- SPP_ARGS(ifp));
-
- p = (void*) (h+1);
- for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
- if (debug)
- addlog(" %s ", sppp_lcp_opt_name(*p));
- switch (*p) {
- case LCP_OPT_MAGIC:
- /* Magic number -- can't use it, use 0 */
- sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC);
- sp->lcp.magic = 0;
- break;
- case LCP_OPT_MRU:
- /*
- * Should not be rejected anyway, since we only
- * negotiate a MRU if explicitly requested by
- * peer.
- */
- sp->lcp.opts &= ~(1 << LCP_OPT_MRU);
- break;
- case LCP_OPT_AUTH_PROTO:
- /*
- * Peer doesn't want to authenticate himself,
- * deny unless this is a dialout call, and
- * AUTHFLAG_NOCALLOUT is set.
- */
- if ((sp->pp_flags & PP_CALLIN) == 0 &&
- (sp->hisauth.flags & AUTHFLAG_NOCALLOUT) != 0) {
- if (debug)
- addlog("[don't insist on auth "
- "for callout]");
- sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
- break;
- }
- if (debug)
- addlog("[access denied]\n");
- lcp.Close(sp);
- break;
- }
- }
- if (debug)
- addlog("\n");
- FREE(buf, M_TEMP);
- return;
-}
-
-/*
- * Analyze the LCP Configure-NAK option list, and adjust our
- * negotiation.
- */
-static void
-sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
-{
- STDDCL;
- u_char *buf, *p;
- u_long magic;
-
- len -= 4;
- buf = MALLOC (len, M_TEMP, M_WAITOK);
- if (!buf)
- return;
-
- if (debug)
- log(LOG_DEBUG, SPP_FMT "lcp nak opts: ",
- SPP_ARGS(ifp));
-
- p = (void*) (h+1);
- for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
- if (debug)
- addlog(" %s ", sppp_lcp_opt_name(*p));
- switch (*p) {
- case LCP_OPT_MAGIC:
- /* Magic number -- renegotiate */
- if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) &&
- len >= 6 && p[1] == 6) {
- magic = (u_long)p[2] << 24 |
- (u_long)p[3] << 16 | p[4] << 8 | p[5];
- /*
- * If the remote magic is our negated one,
- * this looks like a loopback problem.
- * Suggest a new magic to make sure.
- */
- if (magic == ~sp->lcp.magic) {
- if (debug)
- addlog("magic glitch ");
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
- sp->lcp.magic = random();
-#else
- sp->lcp.magic = time.tv_sec + time.tv_usec;
-#endif
- } else {
- sp->lcp.magic = magic;
- if (debug)
- addlog("%lu ", magic);
- }
- }
- break;
- case LCP_OPT_MRU:
- /*
- * Peer wants to advise us to negotiate an MRU.
- * Agree on it if it's reasonable, or use
- * default otherwise.
- */
- if (len >= 4 && p[1] == 4) {
- u_int mru = p[2] * 256 + p[3];
- if (debug)
- addlog("%d ", mru);
- if (mru < PP_MTU || mru > PP_MAX_MRU)
- mru = PP_MTU;
- sp->lcp.mru = mru;
- sp->lcp.opts |= (1 << LCP_OPT_MRU);
- }
- break;
- case LCP_OPT_AUTH_PROTO:
- /*
- * Peer doesn't like our authentication method,
- * deny.
- */
- if (debug)
- addlog("[access denied]\n");
- lcp.Close(sp);
- break;
- }
- }
- if (debug)
- addlog("\n");
- FREE(buf, M_TEMP);
- return;
-}
-
-static void
-sppp_lcp_tlu(struct sppp *sp)
-{
- STDDCL;
- int i;
- u_long mask;
-
- /* XXX ? */
- if (! (ifp->if_flags & IFF_UP) &&
- (ifp->if_flags & IFF_RUNNING)) {
- /* Coming out of loopback mode. */
- if_up(ifp);
- printf (SPP_FMT "up\n", SPP_ARGS(ifp));
- }
-
- for (i = 0; i < IDX_COUNT; i++)
- if ((cps[i])->flags & CP_QUAL)
- (cps[i])->Open(sp);
-
- if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 ||
- (sp->pp_flags & PP_NEEDAUTH) != 0)
- sp->pp_phase = PHASE_AUTHENTICATE;
- else
- sp->pp_phase = PHASE_NETWORK;
-
- if (debug)
- log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
- sppp_phase_name(sp->pp_phase));
-
- /*
- * Open all authentication protocols. This is even required
- * if we already proceeded to network phase, since it might be
- * that remote wants us to authenticate, so we might have to
- * send a PAP request. Undesired authentication protocols
- * don't do anything when they get an Open event.
- */
- for (i = 0; i < IDX_COUNT; i++)
- if ((cps[i])->flags & CP_AUTH)
- (cps[i])->Open(sp);
-
- if (sp->pp_phase == PHASE_NETWORK) {
- /* Notify all NCPs. */
- for (i = 0; i < IDX_COUNT; i++)
- if ((cps[i])->flags & CP_NCP)
- (cps[i])->Open(sp);
- }
-
- /* Send Up events to all started protos. */
- for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
- if (sp->lcp.protos & mask && ((cps[i])->flags & CP_LCP) == 0)
- (cps[i])->Up(sp);
-
- /* notify low-level driver of state change */
- if (sp->pp_chg)
- sp->pp_chg(sp, (int)sp->pp_phase);
-
- if (sp->pp_phase == PHASE_NETWORK)
- /* if no NCP is starting, close down */
- sppp_lcp_check_and_close(sp);
-}
-
-static void
-sppp_lcp_tld(struct sppp *sp)
-{
- STDDCL;
- int i;
- u_long mask;
-
- sp->pp_phase = PHASE_TERMINATE;
-
- if (debug)
- log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
- sppp_phase_name(sp->pp_phase));
-
- /*
- * Take upper layers down. We send the Down event first and
- * the Close second to prevent the upper layers from sending
- * ``a flurry of terminate-request packets'', as the RFC
- * describes it.
- */
- for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
- if (sp->lcp.protos & mask && ((cps[i])->flags & CP_LCP) == 0) {
- (cps[i])->Down(sp);
- (cps[i])->Close(sp);
- }
-}
-
-static void
-sppp_lcp_tls(struct sppp *sp)
-{
- STDDCL;
-
- sp->pp_phase = PHASE_ESTABLISH;
-
- if (debug)
- log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
- sppp_phase_name(sp->pp_phase));
-
- /* Notify lower layer if desired. */
- if (sp->pp_tls)
- (sp->pp_tls)(sp);
- else
- (sp->pp_up)(sp);
-}
-
-static void
-sppp_lcp_tlf(struct sppp *sp)
-{
- STDDCL;
-
- sp->pp_phase = PHASE_DEAD;
- if (debug)
- log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
- sppp_phase_name(sp->pp_phase));
-
- /* Notify lower layer if desired. */
- if (sp->pp_tlf)
- (sp->pp_tlf)(sp);
- else
- (sp->pp_down)(sp);
-}
-
-static void
-sppp_lcp_scr(struct sppp *sp)
-{
- char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */];
- int i = 0;
- u_short authproto;
-
- if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) {
- if (! sp->lcp.magic)
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
- sp->lcp.magic = random();
-#else
- sp->lcp.magic = time.tv_sec + time.tv_usec;
-#endif
- opt[i++] = LCP_OPT_MAGIC;
- opt[i++] = 6;
- opt[i++] = sp->lcp.magic >> 24;
- opt[i++] = sp->lcp.magic >> 16;
- opt[i++] = sp->lcp.magic >> 8;
- opt[i++] = sp->lcp.magic;
- }
-
- if (sp->lcp.opts & (1 << LCP_OPT_MRU)) {
- opt[i++] = LCP_OPT_MRU;
- opt[i++] = 4;
- opt[i++] = sp->lcp.mru >> 8;
- opt[i++] = sp->lcp.mru;
- }
-
- if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) {
- authproto = sp->hisauth.proto;
- opt[i++] = LCP_OPT_AUTH_PROTO;
- opt[i++] = authproto == PPP_CHAP? 5: 4;
- opt[i++] = authproto >> 8;
- opt[i++] = authproto;
- if (authproto == PPP_CHAP)
- opt[i++] = CHAP_MD5;
- }
-
- sp->confid[IDX_LCP] = ++sp->pp_seq;
- sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt);
-}
-
-/*
- * Check the open NCPs, return true if at least one NCP is open.
- */
-static int
-sppp_ncp_check(struct sppp *sp)
-{
- int i, mask;
-
- for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
- if (sp->lcp.protos & mask && (cps[i])->flags & CP_NCP)
- return 1;
- return 0;
-}
-
-/*
- * Re-check the open NCPs and see if we should terminate the link.
- * Called by the NCPs during their tlf action handling.
- */
-static void
-sppp_lcp_check_and_close(struct sppp *sp)
-{
-
- if (sp->pp_phase < PHASE_NETWORK)
- /* don't bother, we are already going down */
- return;
-
- if (sppp_ncp_check(sp))
- return;
-
- lcp.Close(sp);
-}
-\f/*
- *--------------------------------------------------------------------------*
- * *
- * The IPCP implementation. *
- * *
- *--------------------------------------------------------------------------*
- */
-
-static void
-sppp_ipcp_init(struct sppp *sp)
-{
- sp->ipcp.opts = 0;
- sp->ipcp.flags = 0;
- sp->state[IDX_IPCP] = STATE_INITIAL;
- sp->fail_counter[IDX_IPCP] = 0;
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
- callout_handle_init(&sp->ch[IDX_IPCP]);
-#endif
-}
-
-static void
-sppp_ipcp_up(struct sppp *sp)
-{
- sppp_up_event(&ipcp, sp);
-}
-
-static void
-sppp_ipcp_down(struct sppp *sp)
-{
- sppp_down_event(&ipcp, sp);
-}
-
-static void
-sppp_ipcp_open(struct sppp *sp)
-{
- STDDCL;
- u_long myaddr, hisaddr;
-
- sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN);
-
- sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0);
- /*
- * If we don't have his address, this probably means our
- * interface doesn't want to talk IP at all. (This could
- * be the case if somebody wants to speak only IPX, for
- * example.) Don't open IPCP in this case.
- */
- if (hisaddr == 0L) {
- /* XXX this message should go away */
- if (debug)
- log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n",
- SPP_ARGS(ifp));
- return;
- }
-
- if (myaddr == 0L) {
- /*
- * I don't have an assigned address, so i need to
- * negotiate my address.
- */
- sp->ipcp.flags |= IPCP_MYADDR_DYN;
- sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
- } else
- sp->ipcp.flags |= IPCP_MYADDR_SEEN;
- sppp_open_event(&ipcp, sp);
-}
-
-static void
-sppp_ipcp_close(struct sppp *sp)
-{
- sppp_close_event(&ipcp, sp);
- if (sp->ipcp.flags & IPCP_MYADDR_DYN)
- /*
- * My address was dynamic, clear it again.
- */
- sppp_set_ip_addr(sp, 0L);
-}
-
-static void
-sppp_ipcp_TO(void *cookie)
-{
- sppp_to_event(&ipcp, (struct sppp *)cookie);
-}
-
-/*
- * Analyze a configure request. Return true if it was agreeable, and
- * caused action sca, false if it has been rejected or nak'ed, and
- * caused action scn. (The return value is used to make the state
- * transition decision in the state automaton.)
- */
-static int
-sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
-{
- u_char *buf, *r, *p;
- struct ifnet *ifp = &sp->pp_if;
- int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
- u_long hisaddr, desiredaddr;
- int gotmyaddr = 0;
-
- len -= 4;
- origlen = len;
- /*
- * Make sure to allocate a buf that can at least hold a
- * conf-nak with an `address' option. We might need it below.
- */
- buf = r = MALLOC ((len < 6? 6: len), M_TEMP, M_WAITOK);
- if (! buf)
- return (0);
-
- /* pass 1: see if we can recognize them */
- if (debug)
- log(LOG_DEBUG, SPP_FMT "ipcp parse opts: ",
- SPP_ARGS(ifp));
- p = (void*) (h+1);
- for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
- if (debug)
- addlog(" %s ", sppp_ipcp_opt_name(*p));
- switch (*p) {
-#ifdef notyet
- case IPCP_OPT_COMPRESSION:
- if (len >= 6 && p[1] >= 6) {
- /* correctly formed compress option */
- continue;
- }
- if (debug)
- addlog("[invalid] ");
- break;
-#endif
- case IPCP_OPT_ADDRESS:
- if (len >= 6 && p[1] == 6) {
- /* correctly formed address option */
- continue;
- }
- if (debug)
- addlog("[invalid] ");
- break;
- default:
- /* Others not supported. */
- if (debug)
- addlog("[rej] ");
- break;
- }
- /* Add the option to rejected list. */
- bcopy (p, r, p[1]);
- r += p[1];
- rlen += p[1];
- }
- if (rlen) {
- if (debug)
- addlog(" send conf-rej\n");
- sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf);
- return 0;
- } else if (debug)
- addlog("\n");
-
- /* pass 2: parse option values */
- sppp_get_ip_addrs(sp, 0, &hisaddr, 0);
- if (debug)
- log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ",
- SPP_ARGS(ifp));
- p = (void*) (h+1);
- len = origlen;
- for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
- if (debug)
- addlog(" %s ", sppp_ipcp_opt_name(*p));
- switch (*p) {
-#ifdef notyet
- case IPCP_OPT_COMPRESSION:
- continue;
-#endif
- case IPCP_OPT_ADDRESS:
- /* This is the address he wants in his end */
- desiredaddr = p[2] << 24 | p[3] << 16 |
- p[4] << 8 | p[5];
- if (desiredaddr == hisaddr ||
- (hisaddr == 1 && desiredaddr != 0)) {
- /*
- * Peer's address is same as our value,
- * or we have set it to 0.0.0.1 to
- * indicate that we do not really care,
- * this is agreeable. Gonna conf-ack
- * it.
- */
- if (debug)
- addlog("%s [ack] ",
- sppp_dotted_quad(hisaddr));
- /* record that we've seen it already */
- sp->ipcp.flags |= IPCP_HISADDR_SEEN;
- continue;
- }
- /*
- * The address wasn't agreeable. This is either
- * he sent us 0.0.0.0, asking to assign him an
- * address, or he send us another address not
- * matching our value. Either case, we gonna
- * conf-nak it with our value.
- * XXX: we should "rej" if hisaddr == 0
- */
- if (debug) {
- if (desiredaddr == 0)
- addlog("[addr requested] ");
- else
- addlog("%s [not agreed] ",
- sppp_dotted_quad(desiredaddr));
-
- p[2] = hisaddr >> 24;
- p[3] = hisaddr >> 16;
- p[4] = hisaddr >> 8;
- p[5] = hisaddr;
- }
- break;
- }
- /* Add the option to nak'ed list. */
- bcopy (p, r, p[1]);
- r += p[1];
- rlen += p[1];
- }
-
- /*
- * If we are about to conf-ack the request, but haven't seen
- * his address so far, gonna conf-nak it instead, with the
- * `address' option present and our idea of his address being
- * filled in there, to request negotiation of both addresses.
- *
- * XXX This can result in an endless req - nak loop if peer
- * doesn't want to send us his address. Q: What should we do
- * about it? XXX A: implement the max-failure counter.
- */
- if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN) && !gotmyaddr) {
- buf[0] = IPCP_OPT_ADDRESS;
- buf[1] = 6;
- buf[2] = hisaddr >> 24;
- buf[3] = hisaddr >> 16;
- buf[4] = hisaddr >> 8;
- buf[5] = hisaddr;
- rlen = 6;
- if (debug)
- addlog("still need hisaddr ");
- }
-
- if (rlen) {
- if (debug)
- addlog(" send conf-nak\n");
- sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf);
- } else {
- if (debug)
- addlog(" send conf-ack\n");
- sppp_cp_send (sp, PPP_IPCP, CONF_ACK,
- h->ident, origlen, h+1);
- }
-
- FREE(buf, M_TEMP);
- return (rlen == 0);
-}
-
-/*
- * Analyze the IPCP Configure-Reject option list, and adjust our
- * negotiation.
- */
-static void
-sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
-{
- u_char *buf, *p;
- struct ifnet *ifp = &sp->pp_if;
- int debug = ifp->if_flags & IFF_DEBUG;
-
- len -= 4;
- buf = MALLOC (len, M_TEMP, M_WAITOK);
- if (!buf)
- return;
-
- if (debug)
- log(LOG_DEBUG, SPP_FMT "ipcp rej opts: ",
- SPP_ARGS(ifp));
-
- p = (void*) (h+1);
- for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
- if (debug)
- addlog(" %s ", sppp_ipcp_opt_name(*p));
- switch (*p) {
- case IPCP_OPT_ADDRESS:
- /*
- * Peer doesn't grok address option. This is
- * bad. XXX Should we better give up here?
- * XXX We could try old "addresses" option...
- */
- sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS);
- break;
-#ifdef notyet
- case IPCP_OPT_COMPRESS:
- sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS);
- break;
-#endif
- }
- }
- if (debug)
- addlog("\n");
- FREE(buf, M_TEMP);
- return;
-}
-
-/*
- * Analyze the IPCP Configure-NAK option list, and adjust our
- * negotiation.
- */
-static void
-sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
-{
- u_char *buf, *p;
- struct ifnet *ifp = &sp->pp_if;
- int debug = ifp->if_flags & IFF_DEBUG;
- u_long wantaddr;
-
- len -= 4;
- buf = MALLOC (len, M_TEMP, M_WAITOK);
- if (!buf)
- return;
-
- if (debug)
- log(LOG_DEBUG, SPP_FMT "ipcp nak opts: ",
- SPP_ARGS(ifp));
-
- p = (void*) (h+1);
- for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
- if (debug)
- addlog(" %s ", sppp_ipcp_opt_name(*p));
- switch (*p) {
- case IPCP_OPT_ADDRESS:
- /*
- * Peer doesn't like our local IP address. See
- * if we can do something for him. We'll drop
- * him our address then.
- */
- if (len >= 6 && p[1] == 6) {
- wantaddr = p[2] << 24 | p[3] << 16 |
- p[4] << 8 | p[5];
- sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
- if (debug)
- addlog("[wantaddr %s] ",
- sppp_dotted_quad(wantaddr));
- /*
- * When doing dynamic address assignment,
- * we accept his offer. Otherwise, we
- * ignore it and thus continue to negotiate
- * our already existing value.
- * XXX: Bogus, if he said no once, he'll
- * just say no again, might as well die.
- */
- if (sp->ipcp.flags & IPCP_MYADDR_DYN) {
- sppp_set_ip_addr(sp, wantaddr);
- if (debug)
- addlog("[agree] ");
- sp->ipcp.flags |= IPCP_MYADDR_SEEN;
- }
- }
- break;
-#ifdef notyet
- case IPCP_OPT_COMPRESS:
- /*
- * Peer wants different compression parameters.
- */
- break;
-#endif
- }
- }
- if (debug)
- addlog("\n");
- FREE(buf, M_TEMP);
- return;
-}
-
-static void
-sppp_ipcp_tlu(struct sppp *sp)
-{
- /* we are up - notify isdn daemon */
- if (sp->pp_con)
- sp->pp_con(sp);
-}
-
-static void
-sppp_ipcp_tld(struct sppp *sp)
-{
-}
-
-static void
-sppp_ipcp_tls(struct sppp *sp)
-{
- /* indicate to LCP that it must stay alive */
- sp->lcp.protos |= (1 << IDX_IPCP);
-}
-
-static void
-sppp_ipcp_tlf(struct sppp *sp)
-{
- /* we no longer need LCP */
- sp->lcp.protos &= ~(1 << IDX_IPCP);
- sppp_lcp_check_and_close(sp);
-}
-
-static void
-sppp_ipcp_scr(struct sppp *sp)
-{
- char opt[6 /* compression */ + 6 /* address */];
- u_long ouraddr;
- int i = 0;
-
-#ifdef notyet
- if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) {
- opt[i++] = IPCP_OPT_COMPRESSION;
- opt[i++] = 6;
- opt[i++] = 0; /* VJ header compression */
- opt[i++] = 0x2d; /* VJ header compression */
- opt[i++] = max_slot_id;
- opt[i++] = comp_slot_id;
- }
-#endif
-
- if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) {
- sppp_get_ip_addrs(sp, &ouraddr, 0, 0);
- opt[i++] = IPCP_OPT_ADDRESS;
- opt[i++] = 6;
- opt[i++] = ouraddr >> 24;
- opt[i++] = ouraddr >> 16;
- opt[i++] = ouraddr >> 8;
- opt[i++] = ouraddr;
- }
-
- sp->confid[IDX_IPCP] = ++sp->pp_seq;
- sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt);
-}
-
-
-\f/*
- *--------------------------------------------------------------------------*
- * *
- * The CHAP implementation. *
- * *
- *--------------------------------------------------------------------------*
- */
-
-/*
- * The authentication protocols don't employ a full-fledged state machine as
- * the control protocols do, since they do have Open and Close events, but
- * not Up and Down, nor are they explicitly terminated. Also, use of the
- * authentication protocols may be different in both directions (this makes
- * sense, think of a machine that never accepts incoming calls but only
- * calls out, it doesn't require the called party to authenticate itself).
- *
- * Our state machine for the local authentication protocol (we are requesting
- * the peer to authenticate) looks like:
- *
- * RCA-
- * +--------------------------------------------+
- * V scn,tld|
- * +--------+ Close +---------+ RCA+
- * | |<----------------------------------| |------+
- * +--->| Closed | TO* | Opened | sca |
- * | | |-----+ +-------| |<-----+
- * | +--------+ irc | | +---------+
- * | ^ | | ^
- * | | | | |
- * | | | | |
- * | TO-| | | |
- * | |tld TO+ V | |
- * | | +------->+ | |
- * | | | | | |
- * | +--------+ V | |
- * | | |<----+<--------------------+ |
- * | | Req- | scr |
- * | | Sent | |
- * | | | |
- * | +--------+ |
- * | RCA- | | RCA+ |
- * +------+ +------------------------------------------+
- * scn,tld sca,irc,ict,tlu
- *
- *
- * with:
- *
- * Open: LCP reached authentication phase
- * Close: LCP reached terminate phase
- *
- * RCA+: received reply (pap-req, chap-response), acceptable
- * RCN: received reply (pap-req, chap-response), not acceptable
- * TO+: timeout with restart counter >= 0
- * TO-: timeout with restart counter < 0
- * TO*: reschedule timeout for CHAP
- *
- * scr: send request packet (none for PAP, chap-challenge)
- * sca: send ack packet (pap-ack, chap-success)
- * scn: send nak packet (pap-nak, chap-failure)
- * ict: initialize re-challenge timer (CHAP only)
- *
- * tlu: this-layer-up, LCP reaches network phase
- * tld: this-layer-down, LCP enters terminate phase
- *
- * Note that in CHAP mode, after sending a new challenge, while the state
- * automaton falls back into Req-Sent state, it doesn't signal a tld
- * event to LCP, so LCP remains in network phase. Only after not getting
- * any response (or after getting an unacceptable response), CHAP closes,
- * causing LCP to enter terminate phase.
- *
- * With PAP, there is no initial request that can be sent. The peer is
- * expected to send one based on the successful negotiation of PAP as
- * the authentication protocol during the LCP option negotiation.
- *
- * Incoming authentication protocol requests (remote requests
- * authentication, we are peer) don't employ a state machine at all,
- * they are simply answered. Some peers [Ascend P50 firmware rev
- * 4.50] react allergically when sending IPCP requests while they are
- * still in authentication phase (thereby violating the standard that
- * demands that these NCP packets are to be discarded), so we keep
- * track of the peer demanding us to authenticate, and only proceed to
- * phase network once we've seen a positive acknowledge for the
- * authentication.
- */
-
-/*
- * Handle incoming CHAP packets.
- */
-void
-sppp_chap_input(struct sppp *sp, struct mbuf *m)
-{
- STDDCL;
- struct lcp_header *h;
- int len, x;
- u_char *value, *name, digest[AUTHKEYLEN], dsize;
- int value_len, name_len;
- MD5_CTX ctx;
-
- len = m->m_pkthdr.len;
- if (len < 4) {
- if (debug)
- log(LOG_DEBUG,
- SPP_FMT "chap invalid packet length: %d bytes\n",
- SPP_ARGS(ifp), len);
- return;
- }
- h = mtod (m, struct lcp_header*);
- if (len > ntohs (h->len))
- len = ntohs (h->len);
-
- switch (h->type) {
- /* challenge, failure and success are his authproto */
- case CHAP_CHALLENGE:
- value = 1 + (u_char*)(h+1);
- value_len = value[-1];
- name = value + value_len;
- name_len = len - value_len - 5;
- if (name_len < 0) {
- if (debug) {
- log(LOG_DEBUG,
- SPP_FMT "chap corrupted challenge "
- "<%s id=0x%x len=%d",
- SPP_ARGS(ifp),
- sppp_auth_type_name(PPP_CHAP, h->type),
- h->ident, ntohs(h->len));
- if (len > 4)
- sppp_print_bytes((u_char*) (h+1), len-4);
- addlog(">\n");
- }
- break;
- }
-
- if (debug) {
- log(LOG_DEBUG,
- SPP_FMT "chap input <%s id=0x%x len=%d name=",
- SPP_ARGS(ifp),
- sppp_auth_type_name(PPP_CHAP, h->type), h->ident,
- ntohs(h->len));
- sppp_print_string((char*) name, name_len);
- addlog(" value-size=%d value=", value_len);
- sppp_print_bytes(value, value_len);
- addlog(">\n");
- }
-
- /* Compute reply value. */
- MD5Init(&ctx);
- MD5Update(&ctx, &h->ident, 1);
- MD5Update(&ctx, sp->myauth.secret,
- sppp_strnlen(sp->myauth.secret, AUTHKEYLEN));
- MD5Update(&ctx, value, value_len);
- MD5Final(digest, &ctx);
- dsize = sizeof digest;
-
- sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident,
- sizeof dsize, (const char *)&dsize,
- sizeof digest, digest,
- (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
- sp->myauth.name,
- 0);
- break;
-
- case CHAP_SUCCESS:
- if (debug) {
- log(LOG_DEBUG, SPP_FMT "chap success",
- SPP_ARGS(ifp));
- if (len > 4) {
- addlog(": ");
- sppp_print_string((char*)(h + 1), len - 4);
- }
- addlog("\n");
- }
- x = splimp();
- sp->pp_flags &= ~PP_NEEDAUTH;
- if (sp->myauth.proto == PPP_CHAP &&
- (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
- (sp->lcp.protos & (1 << IDX_CHAP)) == 0) {
- /*
- * We are authenticator for CHAP but didn't
- * complete yet. Leave it to tlu to proceed
- * to network phase.
- */
- splx(x);
- break;
- }
- splx(x);
- sppp_phase_network(sp);
- break;
-
- case CHAP_FAILURE:
- if (debug) {
- log(LOG_INFO, SPP_FMT "chap failure",
- SPP_ARGS(ifp));
- if (len > 4) {
- addlog(": ");
- sppp_print_string((char*)(h + 1), len - 4);
- }
- addlog("\n");
- } else
- log(LOG_INFO, SPP_FMT "chap failure\n",
- SPP_ARGS(ifp));
- /* await LCP shutdown by authenticator */
- break;
-
- /* response is my authproto */
- case CHAP_RESPONSE:
- value = 1 + (u_char*)(h+1);
- value_len = value[-1];
- name = value + value_len;
- name_len = len - value_len - 5;
- if (name_len < 0) {
- if (debug) {
- log(LOG_DEBUG,
- SPP_FMT "chap corrupted response "
- "<%s id=0x%x len=%d",
- SPP_ARGS(ifp),
- sppp_auth_type_name(PPP_CHAP, h->type),
- h->ident, ntohs(h->len));
- if (len > 4)
- sppp_print_bytes((u_char*)(h+1), len-4);
- addlog(">\n");
- }
- break;
- }
- if (h->ident != sp->confid[IDX_CHAP]) {
- if (debug)
- log(LOG_DEBUG,
- SPP_FMT "chap dropping response for old ID "
- "(got %d, expected %d)\n",
- SPP_ARGS(ifp),
- h->ident, sp->confid[IDX_CHAP]);
- break;
- }
- if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN)
- || bcmp(name, sp->hisauth.name, name_len) != 0) {
- log(LOG_INFO, SPP_FMT "chap response, his name ",
- SPP_ARGS(ifp));
- sppp_print_string(name, name_len);
- addlog(" != expected ");
- sppp_print_string(sp->hisauth.name,
- sppp_strnlen(sp->hisauth.name, AUTHNAMELEN));
- addlog("\n");
- }
- if (debug) {
- log(LOG_DEBUG, SPP_FMT "chap input(%s) "
- "<%s id=0x%x len=%d name=",
- SPP_ARGS(ifp),
- sppp_state_name(sp->state[IDX_CHAP]),
- sppp_auth_type_name(PPP_CHAP, h->type),
- h->ident, ntohs (h->len));
- sppp_print_string((char*)name, name_len);
- addlog(" value-size=%d value=", value_len);
- sppp_print_bytes(value, value_len);
- addlog(">\n");
- }
- if (value_len != AUTHKEYLEN) {
- if (debug)
- log(LOG_DEBUG,
- SPP_FMT "chap bad hash value length: "
- "%d bytes, should be %d\n",
- SPP_ARGS(ifp), value_len,
- AUTHKEYLEN);
- break;
- }
-
- MD5Init(&ctx);
- MD5Update(&ctx, &h->ident, 1);
- MD5Update(&ctx, sp->hisauth.secret,
- sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN));
- MD5Update(&ctx, sp->myauth.challenge, AUTHKEYLEN);
- MD5Final(digest, &ctx);
-
-#define FAILMSG "Failed..."
-#define SUCCMSG "Welcome!"
-
- if (value_len != sizeof digest ||
- bcmp(digest, value, value_len) != 0) {
- /* action scn, tld */
- sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident,
- sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
- 0);
- chap.tld(sp);
- break;
- }
- /* action sca, perhaps tlu */
- if (sp->state[IDX_CHAP] == STATE_REQ_SENT ||
- sp->state[IDX_CHAP] == STATE_OPENED)
- sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident,
- sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
- 0);
- if (sp->state[IDX_CHAP] == STATE_REQ_SENT) {
- sppp_cp_change_state(&chap, sp, STATE_OPENED);
- chap.tlu(sp);
- }
- break;
-
- default:
- /* Unknown CHAP packet type -- ignore. */
- if (debug) {
- log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) "
- "<0x%x id=0x%xh len=%d",
- SPP_ARGS(ifp),
- sppp_state_name(sp->state[IDX_CHAP]),
- h->type, h->ident, ntohs(h->len));
- if (len > 4)
- sppp_print_bytes((u_char*)(h+1), len-4);
- addlog(">\n");
- }
- break;
-
- }
-}
-
-static void
-sppp_chap_init(struct sppp *sp)
-{
- /* Chap doesn't have STATE_INITIAL at all. */
- sp->state[IDX_CHAP] = STATE_CLOSED;
- sp->fail_counter[IDX_CHAP] = 0;
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
- callout_handle_init(&sp->ch[IDX_CHAP]);
-#endif
-}
-
-static void
-sppp_chap_open(struct sppp *sp)
-{
- if (sp->myauth.proto == PPP_CHAP &&
- (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
- /* we are authenticator for CHAP, start it */
- chap.scr(sp);
- sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
- sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
- }
- /* nothing to be done if we are peer, await a challenge */
-}
-
-static void
-sppp_chap_close(struct sppp *sp)
-{
- if (sp->state[IDX_CHAP] != STATE_CLOSED)
- sppp_cp_change_state(&chap, sp, STATE_CLOSED);
-}
-
-static void
-sppp_chap_TO(void *cookie)
-{
- struct sppp *sp = (struct sppp *)cookie;
- STDDCL;
- int s;
-
- s = splimp();
- if (debug)
- log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n",
- SPP_ARGS(ifp),
- sppp_state_name(sp->state[IDX_CHAP]),
- sp->rst_counter[IDX_CHAP]);
-
- if (--sp->rst_counter[IDX_CHAP] < 0)
- /* TO- event */
- switch (sp->state[IDX_CHAP]) {
- case STATE_REQ_SENT:
- chap.tld(sp);
- sppp_cp_change_state(&chap, sp, STATE_CLOSED);
- break;
- }
- else
- /* TO+ (or TO*) event */
- switch (sp->state[IDX_CHAP]) {
- case STATE_OPENED:
- /* TO* event */
- sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
- /* fall through */
- case STATE_REQ_SENT:
- chap.scr(sp);
- /* sppp_cp_change_state() will restart the timer */
- sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
- break;
- }
-
- splx(s);
-}
-
-static void
-sppp_chap_tlu(struct sppp *sp)
-{
- STDDCL;
- int i, x;
-
- i = 0;
- sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
-
- /*
- * Some broken CHAP implementations (Conware CoNet, firmware
- * 4.0.?) don't want to re-authenticate their CHAP once the
- * initial challenge-response exchange has taken place.
- * Provide for an option to avoid rechallenges.
- */
- if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0) {
- /*
- * Compute the re-challenge timeout. This will yield
- * a number between 300 and 810 seconds.
- */
- i = 300 + ((unsigned)(random() & 0xff00) >> 7);
- TIMEOUT(chap.TO, (void *)sp, i * hz, sp->ch[IDX_CHAP]);
- }
-
- if (debug) {
- log(LOG_DEBUG,
- SPP_FMT "chap %s, ",
- SPP_ARGS(ifp),
- sp->pp_phase == PHASE_NETWORK? "reconfirmed": "tlu");
- if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0)
- addlog("next re-challenge in %d seconds\n", i);
- else
- addlog("re-challenging supressed\n");
- }
-
- x = splimp();
- /* indicate to LCP that we need to be closed down */
- sp->lcp.protos |= (1 << IDX_CHAP);
-
- if (sp->pp_flags & PP_NEEDAUTH) {
- /*
- * Remote is authenticator, but his auth proto didn't
- * complete yet. Defer the transition to network
- * phase.
- */
- splx(x);
- return;
- }
- splx(x);
-
- /*
- * If we are already in phase network, we are done here. This
- * is the case if this is a dummy tlu event after a re-challenge.
- */
- if (sp->pp_phase != PHASE_NETWORK)
- sppp_phase_network(sp);
-}
-
-static void
-sppp_chap_tld(struct sppp *sp)
-{
- STDDCL;
-
- if (debug)
- log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp));
- UNTIMEOUT(chap.TO, (void *)sp, sp->ch[IDX_CHAP]);
- sp->lcp.protos &= ~(1 << IDX_CHAP);
-
- lcp.Close(sp);
-}
-
-static void
-sppp_chap_scr(struct sppp *sp)
-{
- u_long *ch, seed;
- u_char clen;
-
- /* Compute random challenge. */
- ch = (u_long *)sp->myauth.challenge;
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
- read_random(&seed, sizeof seed);
-#else
- {
- struct timeval tv;
- microtime(&tv);
- seed = tv.tv_sec ^ tv.tv_usec;
- }
-#endif
- ch[0] = seed ^ random();
- ch[1] = seed ^ random();
- ch[2] = seed ^ random();
- ch[3] = seed ^ random();
- clen = AUTHKEYLEN;
-
- sp->confid[IDX_CHAP] = ++sp->pp_seq;
-
- sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP],
- sizeof clen, (const char *)&clen,
- (size_t)AUTHKEYLEN, sp->myauth.challenge,
- (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
- sp->myauth.name,
- 0);
-}
-\f/*
- *--------------------------------------------------------------------------*
- * *
- * The PAP implementation. *
- * *
- *--------------------------------------------------------------------------*
- */
-/*
- * For PAP, we need to keep a little state also if we are the peer, not the
- * authenticator. This is since we don't get a request to authenticate, but
- * have to repeatedly authenticate ourself until we got a response (or the
- * retry counter is expired).
- */
-
-/*
- * Handle incoming PAP packets. */
-static void
-sppp_pap_input(struct sppp *sp, struct mbuf *m)
-{
- STDDCL;
- struct lcp_header *h;
- int len, x;
- u_char *name, *passwd, mlen;
- int name_len, passwd_len;
-
- len = m->m_pkthdr.len;
- if (len < 5) {
- if (debug)
- log(LOG_DEBUG,
- SPP_FMT "pap invalid packet length: %d bytes\n",
- SPP_ARGS(ifp), len);
- return;
- }
- h = mtod (m, struct lcp_header*);
- if (len > ntohs (h->len))
- len = ntohs (h->len);
- switch (h->type) {
- /* PAP request is my authproto */
- case PAP_REQ:
- name = 1 + (u_char*)(h+1);
- name_len = name[-1];
- passwd = name + name_len + 1;
- if (name_len > len - 6 ||
- (passwd_len = passwd[-1]) > len - 6 - name_len) {
- if (debug) {
- log(LOG_DEBUG, SPP_FMT "pap corrupted input "
- "<%s id=0x%x len=%d",
- SPP_ARGS(ifp),
- sppp_auth_type_name(PPP_PAP, h->type),
- h->ident, ntohs(h->len));
- if (len > 4)
- sppp_print_bytes((u_char*)(h+1), len-4);
- addlog(">\n");
- }
- break;
- }
- if (debug) {
- log(LOG_DEBUG, SPP_FMT "pap input(%s) "
- "<%s id=0x%x len=%d name=",
- SPP_ARGS(ifp),
- sppp_state_name(sp->state[IDX_PAP]),
- sppp_auth_type_name(PPP_PAP, h->type),
- h->ident, ntohs(h->len));
- sppp_print_string((char*)name, name_len);
- addlog(" passwd=");
- sppp_print_string((char*)passwd, passwd_len);
- addlog(">\n");
- }
- if (name_len > AUTHNAMELEN ||
- passwd_len > AUTHKEYLEN ||
- bcmp(name, sp->hisauth.name, name_len) != 0 ||
- bcmp(passwd, sp->hisauth.secret, passwd_len) != 0) {
- /* action scn, tld */
- mlen = sizeof(FAILMSG) - 1;
- sppp_auth_send(&pap, sp, PAP_NAK, h->ident,
- sizeof mlen, (const char *)&mlen,
- sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
- 0);
- pap.tld(sp);
- break;
- }
- /* action sca, perhaps tlu */
- if (sp->state[IDX_PAP] == STATE_REQ_SENT ||
- sp->state[IDX_PAP] == STATE_OPENED) {
- mlen = sizeof(SUCCMSG) - 1;
- sppp_auth_send(&pap, sp, PAP_ACK, h->ident,
- sizeof mlen, (const char *)&mlen,
- sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
- 0);
- }
- if (sp->state[IDX_PAP] == STATE_REQ_SENT) {
- sppp_cp_change_state(&pap, sp, STATE_OPENED);
- pap.tlu(sp);
- }
- break;
-
- /* ack and nak are his authproto */
- case PAP_ACK:
- UNTIMEOUT(sppp_pap_my_TO, (void *)sp, sp->pap_my_to_ch);
- if (debug) {
- log(LOG_DEBUG, SPP_FMT "pap success",
- SPP_ARGS(ifp));
- name_len = *((char *)h);
- if (len > 5 && name_len) {
- addlog(": ");
- sppp_print_string((char*)(h+1), name_len);
- }
- addlog("\n");
- }
- x = splimp();
- sp->pp_flags &= ~PP_NEEDAUTH;
- if (sp->myauth.proto == PPP_PAP &&
- (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
- (sp->lcp.protos & (1 << IDX_PAP)) == 0) {
- /*
- * We are authenticator for PAP but didn't
- * complete yet. Leave it to tlu to proceed
- * to network phase.
- */
- splx(x);
- break;
- }
- splx(x);
- sppp_phase_network(sp);
- break;
-
- case PAP_NAK:
- UNTIMEOUT(sppp_pap_my_TO, (void *)sp, sp->pap_my_to_ch);
- if (debug) {
- log(LOG_INFO, SPP_FMT "pap failure",
- SPP_ARGS(ifp));
- name_len = *((char *)h);
- if (len > 5 && name_len) {
- addlog(": ");
- sppp_print_string((char*)(h+1), name_len);
- }
- addlog("\n");
- } else
- log(LOG_INFO, SPP_FMT "pap failure\n",
- SPP_ARGS(ifp));
- /* await LCP shutdown by authenticator */
- break;
-
- default:
- /* Unknown PAP packet type -- ignore. */
- if (debug) {
- log(LOG_DEBUG, SPP_FMT "pap corrupted input "
- "<0x%x id=0x%x len=%d",
- SPP_ARGS(ifp),
- h->type, h->ident, ntohs(h->len));
- if (len > 4)
- sppp_print_bytes((u_char*)(h+1), len-4);
- addlog(">\n");
- }
- break;
-
- }
-}
-
-static void
-sppp_pap_init(struct sppp *sp)
-{
- /* PAP doesn't have STATE_INITIAL at all. */
- sp->state[IDX_PAP] = STATE_CLOSED;
- sp->fail_counter[IDX_PAP] = 0;
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
- callout_handle_init(&sp->ch[IDX_PAP]);
- callout_handle_init(&sp->pap_my_to_ch);
-#endif
-}
-
-static void
-sppp_pap_open(struct sppp *sp)
-{
- if (sp->hisauth.proto == PPP_PAP &&
- (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
- /* we are authenticator for PAP, start our timer */
- sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
- sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
- }
- if (sp->myauth.proto == PPP_PAP) {
- /* we are peer, send a request, and start a timer */
- pap.scr(sp);
- TIMEOUT(sppp_pap_my_TO, (void *)sp, sp->lcp.timeout,
- sp->pap_my_to_ch);
- }
-}
-
-static void
-sppp_pap_close(struct sppp *sp)
-{
- if (sp->state[IDX_PAP] != STATE_CLOSED)
- sppp_cp_change_state(&pap, sp, STATE_CLOSED);
-}
-
-/*
- * That's the timeout routine if we are authenticator. Since the
- * authenticator is basically passive in PAP, we can't do much here.
- */
-static void
-sppp_pap_TO(void *cookie)
-{
- struct sppp *sp = (struct sppp *)cookie;
- STDDCL;
- int s;
-
- s = splimp();
- if (debug)
- log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n",
- SPP_ARGS(ifp),
- sppp_state_name(sp->state[IDX_PAP]),
- sp->rst_counter[IDX_PAP]);
-
- if (--sp->rst_counter[IDX_PAP] < 0)
- /* TO- event */
- switch (sp->state[IDX_PAP]) {
- case STATE_REQ_SENT:
- pap.tld(sp);
- sppp_cp_change_state(&pap, sp, STATE_CLOSED);
- break;
- }
- else
- /* TO+ event, not very much we could do */
- switch (sp->state[IDX_PAP]) {
- case STATE_REQ_SENT:
- /* sppp_cp_change_state() will restart the timer */
- sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
- break;
- }
-
- splx(s);
-}
-
-/*
- * That's the timeout handler if we are peer. Since the peer is active,
- * we need to retransmit our PAP request since it is apparently lost.
- * XXX We should impose a max counter.
- */
-static void
-sppp_pap_my_TO(void *cookie)
-{
- struct sppp *sp = (struct sppp *)cookie;
- STDDCL;
-
- if (debug)
- log(LOG_DEBUG, SPP_FMT "pap peer TO\n",
- SPP_ARGS(ifp));
-
- pap.scr(sp);
-}
-
-static void
-sppp_pap_tlu(struct sppp *sp)
-{
- STDDCL;
- int x;
-
- sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
-
- if (debug)
- log(LOG_DEBUG, SPP_FMT "%s tlu\n",
- SPP_ARGS(ifp), pap.name);
-
- x = splimp();
- /* indicate to LCP that we need to be closed down */
- sp->lcp.protos |= (1 << IDX_PAP);
-
- if (sp->pp_flags & PP_NEEDAUTH) {
- /*
- * Remote is authenticator, but his auth proto didn't
- * complete yet. Defer the transition to network
- * phase.
- */
- splx(x);
- return;
- }
- splx(x);
- sppp_phase_network(sp);
-}
-
-static void
-sppp_pap_tld(struct sppp *sp)
-{
- STDDCL;
-
- if (debug)
- log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp));
- UNTIMEOUT(pap.TO, (void *)sp, sp->ch[IDX_PAP]);
- UNTIMEOUT(sppp_pap_my_TO, (void *)sp, sp->pap_my_to_ch);
- sp->lcp.protos &= ~(1 << IDX_PAP);
-
- lcp.Close(sp);
-}
-
-static void
-sppp_pap_scr(struct sppp *sp)
-{
- u_char idlen, pwdlen;
-
- sp->confid[IDX_PAP] = ++sp->pp_seq;
- pwdlen = sppp_strnlen(sp->myauth.secret, AUTHKEYLEN);
- idlen = sppp_strnlen(sp->myauth.name, AUTHNAMELEN);
-
- sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP],
- sizeof idlen, (const char *)&idlen,
- (size_t)idlen, sp->myauth.name,
- sizeof pwdlen, (const char *)&pwdlen,
- (size_t)pwdlen, sp->myauth.secret,
- 0);
-}
-\f/*
- * Random miscellaneous functions.
- */
-
-/*
- * Send a PAP or CHAP proto packet.
- *
- * Varadic function, each of the elements for the ellipsis is of type
- * ``size_t mlen, const u_char *msg''. Processing will stop iff
- * mlen == 0.
- * NOTE: never declare variadic functions with types subject to type
- * promotion (i.e. u_char). This is asking for big trouble depending
- * on the architecture you are on...
- */
-
-static void
-sppp_auth_send(const struct cp *cp, struct sppp *sp,
- unsigned int type, unsigned int id,
- ...)
-{
- STDDCL;
- struct ppp_header *h;
- struct lcp_header *lh;
- struct mbuf *m;
- u_char *p;
- int len;
- unsigned int mlen;
- const char *msg;
- va_list ap;
-
- MGETHDR (m, M_DONTWAIT, MT_DATA);
- if (! m)
- return;
- m->m_pkthdr.rcvif = 0;
-
- h = mtod (m, struct ppp_header*);
- h->address = PPP_ALLSTATIONS; /* broadcast address */
- h->control = PPP_UI; /* Unnumbered Info */
- h->protocol = htons(cp->proto);
-
- lh = (struct lcp_header*)(h + 1);
- lh->type = type;
- lh->ident = id;
- p = (u_char*) (lh+1);
-
- va_start(ap, id);
- len = 0;
-
- while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) {
- msg = va_arg(ap, const char *);
- len += mlen;
- if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN) {
- va_end(ap);
- m_freem(m);
- return;
- }
-
- bcopy(msg, p, mlen);
- p += mlen;
- }
- va_end(ap);
-
- m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
- lh->len = htons (LCP_HEADER_LEN + len);
-
- if (debug) {
- log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
- SPP_ARGS(ifp), cp->name,
- sppp_auth_type_name(cp->proto, lh->type),
- lh->ident, ntohs(lh->len));
- if (len)
- sppp_print_bytes((u_char*) (lh+1), len);
- addlog(">\n");
- }
- if (IF_QFULL (&sp->pp_cpq)) {
- IF_DROP (&sp->pp_fastq);
- IF_DROP (&ifp->if_snd);
- m_freem (m);
- ++ifp->if_oerrors;
- } else
- IF_ENQUEUE (&sp->pp_cpq, m);
- if (! (ifp->if_flags & IFF_OACTIVE))
- (*ifp->if_start) (ifp);
- ifp->if_obytes += m->m_pkthdr.len + 3;
-}
-
-/*
- * Flush interface queue.
- */
-static void
-sppp_qflush(struct ifqueue *ifq)
-{
- struct mbuf *m, *n;
-
- n = ifq->ifq_head;
- while ((m = n)) {
- n = m->m_act;
- m_freem (m);
- }
- ifq->ifq_head = 0;
- ifq->ifq_tail = 0;
- ifq->ifq_len = 0;
-}
-
-/*
- * Send keepalive packets, every 10 seconds.
- */
-static void
-sppp_keepalive(void *dummy)
-{
- struct sppp *sp;
- int s;
-
- s = splimp();
- for (sp=spppq; sp; sp=sp->pp_next) {
- struct ifnet *ifp = &sp->pp_if;
-
- /* Keepalive mode disabled or channel down? */
- if (! (sp->pp_flags & PP_KEEPALIVE) ||
- ! (ifp->if_flags & IFF_RUNNING))
- continue;
-
- /* No keepalive in PPP mode if LCP not opened yet. */
- if (! (sp->pp_flags & PP_CISCO) &&
- sp->pp_phase < PHASE_AUTHENTICATE)
- continue;
-
- if (sp->pp_alivecnt == MAXALIVECNT) {
- /* No keepalive packets got. Stop the interface. */
- printf (SPP_FMT "down\n", SPP_ARGS(ifp));
- if_down (ifp);
- sppp_qflush (&sp->pp_cpq);
- if (! (sp->pp_flags & PP_CISCO)) {
- /* XXX */
- /* Shut down the PPP link. */
- lcp.Down(sp);
- /* Initiate negotiation. XXX */
- lcp.Up(sp);
- }
- }
- if (sp->pp_alivecnt <= MAXALIVECNT)
- ++sp->pp_alivecnt;
- if (sp->pp_flags & PP_CISCO)
- sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ, ++sp->pp_seq,
- sp->pp_rseq);
- else if (sp->pp_phase >= PHASE_AUTHENTICATE) {
- long nmagic = htonl (sp->lcp.magic);
- sp->lcp.echoid = ++sp->pp_seq;
- sppp_cp_send (sp, PPP_LCP, ECHO_REQ,
- sp->lcp.echoid, 4, &nmagic);
- }
- }
- splx(s);
- TIMEOUT(sppp_keepalive, 0, hz * 10, keepalive_ch);
-}
-
-/*
- * Get both IP addresses.
- */
-static void
-sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst, u_long *srcmask)
-{
- struct ifnet *ifp = &sp->pp_if;
- struct ifaddr *ifa;
- struct sockaddr_in *si, *sm;
- u_long ssrc, ddst;
-
- sm = NULL;
- ssrc = ddst = 0L;
- /*
- * Pick the first AF_INET address from the list,
- * aliases don't make any sense on a p2p link anyway.
- */
- si = 0;
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
- TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
-#elif defined(__NetBSD__) || defined (__OpenBSD__)
- for (ifa = ifp->if_addrlist.tqh_first;
- ifa;
- ifa = ifa->ifa_list.tqe_next)
-#else
- for (ifa = ifp->if_addrlist;
- ifa;
- ifa = ifa->ifa_next)
-#endif
- if (ifa->ifa_addr->sa_family == AF_INET) {
- si = (struct sockaddr_in *)ifa->ifa_addr;
- sm = (struct sockaddr_in *)ifa->ifa_netmask;
- if (si)
- break;
- }
- if (ifa) {
- if (si && si->sin_addr.s_addr) {
- ssrc = si->sin_addr.s_addr;
- if (srcmask)
- *srcmask = ntohl(sm->sin_addr.s_addr);
- }
-
- si = (struct sockaddr_in *)ifa->ifa_dstaddr;
- if (si && si->sin_addr.s_addr)
- ddst = si->sin_addr.s_addr;
- }
-
- if (dst) *dst = ntohl(ddst);
- if (src) *src = ntohl(ssrc);
-}
-
-/*
- * Set my IP address. Must be called at splimp.
- */
-static void
-sppp_set_ip_addr(struct sppp *sp, u_long src)
-{
- STDDCL;
- struct ifaddr *ifa;
- struct sockaddr_in *si;
-
- /*
- * Pick the first AF_INET address from the list,
- * aliases don't make any sense on a p2p link anyway.
- */
- si = 0;
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
- TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
-#elif defined(__NetBSD__) || defined (__OpenBSD__)
- for (ifa = ifp->if_addrlist.tqh_first;
- ifa;
- ifa = ifa->ifa_list.tqe_next)
-#else
- for (ifa = ifp->if_addrlist;
- ifa;
- ifa = ifa->ifa_next)
-#endif
- {
- if (ifa->ifa_addr->sa_family == AF_INET)
- {
- si = (struct sockaddr_in *)ifa->ifa_addr;
- if (si)
- break;
- }
- }
-
- if (ifa && si)
- {
- int error;
-#if __NetBSD_Version__ >= 103080000
- struct sockaddr_in new_sin = *si;
-
- new_sin.sin_addr.s_addr = htonl(src);
- error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 1);
- if(debug && error)
- {
- log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: in_ifinit "
- " failed, error=%d\n", SPP_ARGS(ifp), error);
- }
-#else
- /* delete old route */
- error = rtinit(ifa, (int)RTM_DELETE, RTF_HOST);
- if(debug && error)
- {
- log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit DEL failed, error=%d\n",
- SPP_ARGS(ifp), error);
- }
-
- /* set new address */
- si->sin_addr.s_addr = htonl(src);
-
- /* add new route */
- error = rtinit(ifa, (int)RTM_ADD, RTF_HOST);
- if (debug && error)
- {
- log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit ADD failed, error=%d",
- SPP_ARGS(ifp), error);
- }
-#endif
- }
-}
-
-static int
-sppp_params(struct sppp *sp, u_long cmd, void *data)
-{
- u_long subcmd;
- struct ifreq *ifr = (struct ifreq *)data;
- struct spppreq spr;
-
- /*
- * ifr->ifr_data is supposed to point to a struct spppreq.
- * Check the cmd word first before attempting to fetch all the
- * data.
- */
- if ((subcmd = fuword(ifr->ifr_data)) == -1)
- return EFAULT;
-
- if (copyin((caddr_t)ifr->ifr_data, &spr, sizeof spr) != 0)
- return EFAULT;
-
- switch (subcmd) {
- case SPPPIOGDEFS:
- if (cmd != SIOCGIFGENERIC)
- return EINVAL;
- /*
- * We copy over the entire current state, but clean
- * out some of the stuff we don't wanna pass up.
- * Remember, SIOCGIFGENERIC is unprotected, and can be
- * called by any user. No need to ever get PAP or
- * CHAP secrets back to userland anyway.
- */
- bcopy(sp, &spr.defs, sizeof(struct sppp));
- bzero(spr.defs.myauth.secret, AUTHKEYLEN);
- bzero(spr.defs.myauth.challenge, AUTHKEYLEN);
- bzero(spr.defs.hisauth.secret, AUTHKEYLEN);
- bzero(spr.defs.hisauth.challenge, AUTHKEYLEN);
- return copyout(&spr, (caddr_t)ifr->ifr_data, sizeof spr);
-
- case SPPPIOSDEFS:
- if (cmd != SIOCSIFGENERIC)
- return EINVAL;
- /*
- * We have a very specific idea of which fields we allow
- * being passed back from userland, so to not clobber our
- * current state. For one, we only allow setting
- * anything if LCP is in dead phase. Once the LCP
- * negotiations started, the authentication settings must
- * not be changed again. (The administrator can force an
- * ifconfig down in order to get LCP back into dead
- * phase.)
- *
- * Also, we only allow for authentication parameters to be
- * specified.
- *
- * XXX Should allow to set or clear pp_flags.
- *
- * Finally, if the respective authentication protocol to
- * be used is set differently than 0, but the secret is
- * passed as all zeros, we don't trash the existing secret.
- * This allows an administrator to change the system name
- * only without clobbering the secret (which he didn't get
- * back in a previous SPPPIOGDEFS call). However, the
- * secrets are cleared if the authentication protocol is
- * reset to 0.
- */
- if (sp->pp_phase != PHASE_DEAD)
- return EBUSY;
-
- if ((spr.defs.myauth.proto != 0 && spr.defs.myauth.proto != PPP_PAP &&
- spr.defs.myauth.proto != PPP_CHAP) ||
- (spr.defs.hisauth.proto != 0 && spr.defs.hisauth.proto != PPP_PAP &&
- spr.defs.hisauth.proto != PPP_CHAP))
- return EINVAL;
-
- if (spr.defs.myauth.proto == 0)
- /* resetting myauth */
- bzero(&sp->myauth, sizeof sp->myauth);
- else {
- /* setting/changing myauth */
- sp->myauth.proto = spr.defs.myauth.proto;
- bcopy(spr.defs.myauth.name, sp->myauth.name, AUTHNAMELEN);
- if (spr.defs.myauth.secret[0] != '\0')
- bcopy(spr.defs.myauth.secret, sp->myauth.secret,
- AUTHKEYLEN);
- }
- if (spr.defs.hisauth.proto == 0)
- /* resetting hisauth */
- bzero(&sp->hisauth, sizeof sp->hisauth);
- else {
- /* setting/changing hisauth */
- sp->hisauth.proto = spr.defs.hisauth.proto;
- sp->hisauth.flags = spr.defs.hisauth.flags;
- bcopy(spr.defs.hisauth.name, sp->hisauth.name, AUTHNAMELEN);
- if (spr.defs.hisauth.secret[0] != '\0')
- bcopy(spr.defs.hisauth.secret, sp->hisauth.secret,
- AUTHKEYLEN);
- }
- break;
-
- default:
- return EINVAL;
- }
-
- return 0;
-}
-
-static void
-sppp_phase_network(struct sppp *sp)
-{
- STDDCL;
- int i;
- u_long mask;
-
- sp->pp_phase = PHASE_NETWORK;
-
- if (debug)
- log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
- sppp_phase_name(sp->pp_phase));
-
- /* Notify NCPs now. */
- for (i = 0; i < IDX_COUNT; i++)
- if ((cps[i])->flags & CP_NCP)
- (cps[i])->Open(sp);
-
- /* Send Up events to all NCPs. */
- for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
- if (sp->lcp.protos & mask && ((cps[i])->flags & CP_NCP))
- (cps[i])->Up(sp);
-
- /* if no NCP is starting, all this was in vain, close down */
- sppp_lcp_check_and_close(sp);
-}
-
-
-static const char *
-sppp_cp_type_name(u_char type)
-{
- static char buf[12];
- switch (type) {
- case CONF_REQ: return "conf-req";
- case CONF_ACK: return "conf-ack";
- case CONF_NAK: return "conf-nak";
- case CONF_REJ: return "conf-rej";
- case TERM_REQ: return "term-req";
- case TERM_ACK: return "term-ack";
- case CODE_REJ: return "code-rej";
- case PROTO_REJ: return "proto-rej";
- case ECHO_REQ: return "echo-req";
- case ECHO_REPLY: return "echo-reply";
- case DISC_REQ: return "discard-req";
- }
- snprintf (buf, sizeof(buf), "0x%x", type);
- return buf;
-}
-
-static const char *
-sppp_auth_type_name(u_short proto, u_char type)
-{
- static char buf[12];
- switch (proto) {
- case PPP_CHAP:
- switch (type) {
- case CHAP_CHALLENGE: return "challenge";
- case CHAP_RESPONSE: return "response";
- case CHAP_SUCCESS: return "success";
- case CHAP_FAILURE: return "failure";
- }
- case PPP_PAP:
- switch (type) {
- case PAP_REQ: return "req";
- case PAP_ACK: return "ack";
- case PAP_NAK: return "nak";
- }
- }
- snprintf (buf, sizeof(buf), "0x%x", type);
- return buf;
-}
-
-static const char *
-sppp_lcp_opt_name(u_char opt)
-{
- static char buf[12];
- switch (opt) {
- case LCP_OPT_MRU: return "mru";
- case LCP_OPT_ASYNC_MAP: return "async-map";
- case LCP_OPT_AUTH_PROTO: return "auth-proto";
- case LCP_OPT_QUAL_PROTO: return "qual-proto";
- case LCP_OPT_MAGIC: return "magic";
- case LCP_OPT_PROTO_COMP: return "proto-comp";
- case LCP_OPT_ADDR_COMP: return "addr-comp";
- }
- snprintf (buf, sizeof(buf), "0x%x", opt);
- return buf;
-}
-
-static const char *
-sppp_ipcp_opt_name(u_char opt)
-{
- static char buf[12];
- switch (opt) {
- case IPCP_OPT_ADDRESSES: return "addresses";
- case IPCP_OPT_COMPRESSION: return "compression";
- case IPCP_OPT_ADDRESS: return "address";
- }
- snprintf (buf, sizeof(buf), "0x%x", opt);
- return buf;
-}
-
-static const char *
-sppp_state_name(int state)
-{
- switch (state) {
- case STATE_INITIAL: return "initial";
- case STATE_STARTING: return "starting";
- case STATE_CLOSED: return "closed";
- case STATE_STOPPED: return "stopped";
- case STATE_CLOSING: return "closing";
- case STATE_STOPPING: return "stopping";
- case STATE_REQ_SENT: return "req-sent";
- case STATE_ACK_RCVD: return "ack-rcvd";
- case STATE_ACK_SENT: return "ack-sent";
- case STATE_OPENED: return "opened";
- }
- return "illegal";
-}
-
-static const char *
-sppp_phase_name(enum ppp_phase phase)
-{
- switch (phase) {
- case PHASE_DEAD: return "dead";
- case PHASE_ESTABLISH: return "establish";
- case PHASE_TERMINATE: return "terminate";
- case PHASE_AUTHENTICATE: return "authenticate";
- case PHASE_NETWORK: return "network";
- }
- return "illegal";
-}
-
-static const char *
-sppp_proto_name(u_short proto)
-{
- static char buf[12];
- switch (proto) {
- case PPP_LCP: return "lcp";
- case PPP_IPCP: return "ipcp";
- case PPP_PAP: return "pap";
- case PPP_CHAP: return "chap";
- }
- snprintf(buf, sizeof(buf), "0x%x", (unsigned)proto);
- return buf;
-}
-
-static void
-sppp_print_bytes(const u_char *p, u_short len)
-{
- addlog(" %02x", *p++);
- while (--len > 0)
- addlog("-%02x", *p++);
-}
-
-static void
-sppp_print_string(const char *p, u_short len)
-{
- u_char c;
-
- while (len-- > 0) {
- c = *p++;
- /*
- * Print only ASCII chars directly. RFC 1994 recommends
- * using only them, but we don't rely on it. */
- if (c < ' ' || c > '~')
- addlog("\\x%x", c);
- else
- addlog("%c", c);
- }
-}
-
-static const char *
-sppp_dotted_quad(u_long addr)
-{
- static char s[16];
- sprintf(s, "%d.%d.%d.%d",
- (int)((addr >> 24) & 0xff),
- (int)((addr >> 16) & 0xff),
- (int)((addr >> 8) & 0xff),
- (int)(addr & 0xff));
- return s;
-}
-
-static int
-sppp_strnlen(u_char *p, int max)
-{
- int len;
-
- for (len = 0; len < max && *p; ++p)
- ++len;
- return len;
-}
-
-/* a dummy, used to drop uninteresting events */
-static void
-sppp_null(struct sppp *unused)
-{
- /* do just nothing */
-}
projects / apple / xnu.git / blobdiff