--- /dev/null
+ Add cifdefroute patch from Debian / SuSE to implement replacedefaultroute
+
+ http://packages.debian.org/source/etch/ppp
+
+ Debian source package for ppp 2.4.4rel-8
+
+ zcat http://ftp.de.debian.org/debian/pool/main/p/ppp/ppp_2.4.4rel-8.diff.gz |
+ patch -p0, then look for debian/patches/cifdefroute.diff
+
+diff --git a/pppd/ipcp.c b/pppd/ipcp.c
+index 5962c47..e6f7e2a 100644
+--- a/pppd/ipcp.c
++++ b/pppd/ipcp.c
+@@ -197,6 +197,14 @@ static option_t ipcp_option_list[] = {
+ "disable defaultroute option", OPT_ALIAS | OPT_A2CLR,
+ &ipcp_wantoptions[0].default_route },
+
++ { "replacedefaultroute", o_bool,
++ &ipcp_wantoptions[0].replace_default_route,
++ "Replace default route", 1
++ },
++ { "noreplacedefaultroute", o_bool,
++ &ipcp_allowoptions[0].replace_default_route,
++ "Never replace default route", OPT_A2COPY,
++ &ipcp_wantoptions[0].replace_default_route },
+ { "proxyarp", o_bool, &ipcp_wantoptions[0].proxy_arp,
+ "Add proxy ARP entry", OPT_ENABLE|1, &ipcp_allowoptions[0].proxy_arp },
+ { "noproxyarp", o_bool, &ipcp_allowoptions[0].proxy_arp,
+@@ -263,7 +271,7 @@ struct protent ipcp_protent = {
+ ip_active_pkt
+ };
+
+-static void ipcp_clear_addrs __P((int, u_int32_t, u_int32_t));
++static void ipcp_clear_addrs __P((int, u_int32_t, u_int32_t, bool));
+ static void ipcp_script __P((char *, int)); /* Run an up/down script */
+ static void ipcp_script_done __P((void *));
+
+@@ -1660,7 +1668,8 @@ ip_demand_conf(u)
+ if (!sifnpmode(u, PPP_IP, NPMODE_QUEUE))
+ return 0;
+ if (wo->default_route)
+- if (sifdefaultroute(u, wo->ouraddr, wo->hisaddr))
++ if (sifdefaultroute(u, wo->ouraddr, wo->hisaddr,
++ wo->replace_default_route))
+ default_route_set[u] = 1;
+ if (wo->proxy_arp)
+ if (sifproxyarp(u, wo->hisaddr))
+@@ -1742,7 +1751,8 @@ ipcp_up(f)
+ */
+ if (demand) {
+ if (go->ouraddr != wo->ouraddr || ho->hisaddr != wo->hisaddr) {
+- ipcp_clear_addrs(f->unit, wo->ouraddr, wo->hisaddr);
++ ipcp_clear_addrs(f->unit, wo->ouraddr, wo->hisaddr,
++ wo->replace_default_route);
+ if (go->ouraddr != wo->ouraddr) {
+ warn("Local IP address changed to %I", go->ouraddr);
+ script_setenv("OLDIPLOCAL", ip_ntoa(wo->ouraddr), 0);
+@@ -1767,7 +1777,8 @@ ipcp_up(f)
+
+ /* assign a default route through the interface if required */
+ if (ipcp_wantoptions[f->unit].default_route)
+- if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr))
++ if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr,
++ wo->replace_default_route))
+ default_route_set[f->unit] = 1;
+
+ /* Make a proxy ARP entry if requested. */
+@@ -1817,7 +1828,8 @@ ipcp_up(f)
+
+ /* assign a default route through the interface if required */
+ if (ipcp_wantoptions[f->unit].default_route)
+- if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr))
++ if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr,
++ wo->replace_default_route))
+ default_route_set[f->unit] = 1;
+
+ /* Make a proxy ARP entry if requested. */
+@@ -1894,7 +1906,7 @@ ipcp_down(f)
+ sifnpmode(f->unit, PPP_IP, NPMODE_DROP);
+ sifdown(f->unit);
+ ipcp_clear_addrs(f->unit, ipcp_gotoptions[f->unit].ouraddr,
+- ipcp_hisoptions[f->unit].hisaddr);
++ ipcp_hisoptions[f->unit].hisaddr, 0);
+ }
+
+ /* Execute the ip-down script */
+@@ -1910,16 +1922,25 @@ ipcp_down(f)
+ * proxy arp entries, etc.
+ */
+ static void
+-ipcp_clear_addrs(unit, ouraddr, hisaddr)
++ipcp_clear_addrs(unit, ouraddr, hisaddr, replacedefaultroute)
+ int unit;
+ u_int32_t ouraddr; /* local address */
+ u_int32_t hisaddr; /* remote address */
++ bool replacedefaultroute;
+ {
+ if (proxy_arp_set[unit]) {
+ cifproxyarp(unit, hisaddr);
+ proxy_arp_set[unit] = 0;
+ }
+- if (default_route_set[unit]) {
++ /* If replacedefaultroute, sifdefaultroute will be called soon
++ * with replacedefaultroute set and that will overwrite the current
++ * default route. This is the case only when doing demand, otherwise
++ * during demand, this cifdefaultroute would restore the old default
++ * route which is not what we want in this case. In the non-demand
++ * case, we'll delete the default route and restore the old if there
++ * is one saved by an sifdefaultroute with replacedefaultroute.
++ */
++ if (!replacedefaultroute && default_route_set[unit]) {
+ cifdefaultroute(unit, ouraddr, hisaddr);
+ default_route_set[unit] = 0;
+ }
+diff --git a/pppd/ipcp.h b/pppd/ipcp.h
+index 6cf14c9..7ecfa79 100644
+--- a/pppd/ipcp.h
++++ b/pppd/ipcp.h
+@@ -70,6 +70,7 @@ typedef struct ipcp_options {
+ bool old_addrs; /* Use old (IP-Addresses) option? */
+ bool req_addr; /* Ask peer to send IP address? */
+ bool default_route; /* Assign default route through interface? */
++ bool replace_default_route; /* Replace default route through interface? */
+ bool proxy_arp; /* Make proxy ARP entry for peer? */
+ bool neg_vj; /* Van Jacobson Compression? */
+ bool old_vj; /* use old (short) form of VJ option? */
+diff --git a/pppd/pppd.8 b/pppd/pppd.8
+index 5f82469..222fa30 100644
+--- a/pppd/pppd.8
++++ b/pppd/pppd.8
+@@ -121,6 +121,11 @@ the gateway, when IPCP negotiation is successfully completed.
+ This entry is removed when the PPP connection is broken. This option
+ is privileged if the \fInodefaultroute\fR option has been specified.
+ .TP
++.B replacedefaultroute
++This option is a flag to the defaultroute option. If defaultroute is
++set and this flag is also set, pppd replaces an existing default route
++with the new default route.
++.TP
+ .B disconnect \fIscript
+ Execute the command specified by \fIscript\fR, by passing it to a
+ shell, after
+@@ -706,7 +711,12 @@ disable both forms of hardware flow control.
+ .TP
+ .B nodefaultroute
+ Disable the \fIdefaultroute\fR option. The system administrator who
+-wishes to prevent users from creating default routes with pppd
++wishes to prevent users from adding a default route with pppd
++can do so by placing this option in the /etc/ppp/options file.
++.TP
++.B noreplacedefaultroute
++Disable the \fIreplacedefaultroute\fR option. The system administrator who
++wishes to prevent users from replacing a default route with pppd
+ can do so by placing this option in the /etc/ppp/options file.
+ .TP
+ .B nodeflate
+diff --git a/pppd/pppd.h b/pppd/pppd.h
+index f43a039..feff5e6 100644
+--- a/pppd/pppd.h
++++ b/pppd/pppd.h
+@@ -642,7 +642,7 @@ int sif6addr __P((int, eui64_t, eui64_t));
+ int cif6addr __P((int, eui64_t, eui64_t));
+ /* Remove an IPv6 address from i/f */
+ #endif
+-int sifdefaultroute __P((int, u_int32_t, u_int32_t));
++int sifdefaultroute __P((int, u_int32_t, u_int32_t, bool replace_default_rt));
+ /* Create default route through i/f */
+ int cifdefaultroute __P((int, u_int32_t, u_int32_t));
+ /* Delete default route through i/f */
+diff --git a/pppd/sys-linux.c b/pppd/sys-linux.c
+index e23315a..712582d 100644
+--- a/pppd/sys-linux.c
++++ b/pppd/sys-linux.c
+@@ -206,6 +206,8 @@ static unsigned char inbuf[512]; /* buffer for chars read from loopback */
+
+ static int if_is_up; /* Interface has been marked up */
+ static int have_default_route; /* Gateway for default route added */
++static struct rtentry old_def_rt; /* Old default route */
++static int default_rt_repl_rest; /* replace and restore old default rt */
+ static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */
+ static char proxy_arp_dev[16]; /* Device for proxy arp entry */
+ static u_int32_t our_old_addr; /* for detecting address changes */
+@@ -1513,6 +1515,9 @@ static int read_route_table(struct rtentry *rt)
+ p = NULL;
+ }
+
++ SET_SA_FAMILY (rt->rt_dst, AF_INET);
++ SET_SA_FAMILY (rt->rt_gateway, AF_INET);
++
+ SIN_ADDR(rt->rt_dst) = strtoul(cols[route_dest_col], NULL, 16);
+ SIN_ADDR(rt->rt_gateway) = strtoul(cols[route_gw_col], NULL, 16);
+ SIN_ADDR(rt->rt_genmask) = strtoul(cols[route_mask_col], NULL, 16);
+@@ -1582,20 +1587,51 @@ int have_route_to(u_int32_t addr)
+ /********************************************************************
+ *
+ * sifdefaultroute - assign a default route through the address given.
+- */
+-
+-int sifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway)
+-{
+- struct rtentry rt;
+-
+- if (defaultroute_exists(&rt) && strcmp(rt.rt_dev, ifname) != 0) {
+- if (rt.rt_flags & RTF_GATEWAY)
+- error("not replacing existing default route via %I",
+- SIN_ADDR(rt.rt_gateway));
+- else
++ *
++ * If the global default_rt_repl_rest flag is set, then this function
++ * already replaced the original system defaultroute with some other
++ * route and it should just replace the current defaultroute with
++ * another one, without saving the current route. Use: demand mode,
++ * when pppd sets first a defaultroute it it's temporary ppp0 addresses
++ * and then changes the temporary addresses to the addresses for the real
++ * ppp connection when it has come up.
++ */
++
++int sifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway, bool replace)
++{
++ struct rtentry rt, tmp_rt;
++ struct rtentry *del_rt = NULL;
++
++ if (default_rt_repl_rest) {
++ /* We have already reclaced the original defaultroute, if we
++ are called again, we will delete the current default route
++ and set the new default route in this function.
++ - this is normally only the case the doing demand: */
++ if (defaultroute_exists(&tmp_rt))
++ del_rt = &tmp_rt;
++ } else if (defaultroute_exists(&old_def_rt) &&
++ strcmp(old_def_rt.rt_dev, ifname) != 0) {
++ /* We did not yet replace an existing default route, let's
++ check if we should save and replace a default route: */
++ if (old_def_rt.rt_flags & RTF_GATEWAY) {
++ if (!replace) {
++ error("not replacing existing default route via %I",
++ SIN_ADDR(old_def_rt.rt_gateway));
++ return 0;
++ } else {
++ /* we need to copy rt_dev because we need it permanent too: */
++ char *tmp_dev = malloc(strlen(old_def_rt.rt_dev) + 1);
++ strcpy(tmp_dev, old_def_rt.rt_dev);
++ old_def_rt.rt_dev = tmp_dev;
++
++ notice("replacing old default route to %s [%I]",
++ old_def_rt.rt_dev, SIN_ADDR(old_def_rt.rt_gateway));
++ default_rt_repl_rest = 1;
++ del_rt = &old_def_rt;
++ }
++ } else
+ error("not replacing existing default route through %s",
+- rt.rt_dev);
+- return 0;
++ old_def_rt.rt_dev);
+ }
+
+ memset (&rt, 0, sizeof (rt));
+@@ -1610,10 +1646,16 @@ int sifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway)
+
+ rt.rt_flags = RTF_UP;
+ if (ioctl(sock_fd, SIOCADDRT, &rt) < 0) {
+- if ( ! ok_error ( errno ))
++ if (!ok_error(errno))
+ error("default route ioctl(SIOCADDRT): %m");
+ return 0;
+ }
++ if (default_rt_repl_rest && del_rt)
++ if (ioctl(sock_fd, SIOCDELRT, del_rt) < 0) {
++ if (!ok_error(errno))
++ error("del old default route ioctl(SIOCDELRT): %m");
++ return 0;
++ }
+
+ have_default_route = 1;
+ return 1;
+@@ -1642,11 +1684,21 @@ int cifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway)
+ rt.rt_flags = RTF_UP;
+ if (ioctl(sock_fd, SIOCDELRT, &rt) < 0 && errno != ESRCH) {
+ if (still_ppp()) {
+- if ( ! ok_error ( errno ))
++ if (!ok_error(errno))
+ error("default route ioctl(SIOCDELRT): %m");
+ return 0;
+ }
+ }
++ if (default_rt_repl_rest) {
++ notice("restoring old default route to %s [%I]",
++ old_def_rt.rt_dev, SIN_ADDR(old_def_rt.rt_gateway));
++ if (ioctl(sock_fd, SIOCADDRT, &old_def_rt) < 0) {
++ if (!ok_error(errno))
++ error("restore default route ioctl(SIOCADDRT): %m");
++ return 0;
++ }
++ default_rt_repl_rest = 0;
++ }
+
+ return 1;
+ }
+diff --git a/pppd/sys-solaris.c b/pppd/sys-solaris.c
+index add4423..91677fe 100644
+--- a/pppd/sys-solaris.c
++++ b/pppd/sys-solaris.c
+@@ -2036,12 +2036,18 @@ cifaddr(u, o, h)
+ * sifdefaultroute - assign a default route through the address given.
+ */
+ int
+-sifdefaultroute(u, l, g)
++sifdefaultroute(u, l, g, replace)
+ int u;
+ u_int32_t l, g;
++ bool replace;
+ {
+ struct rtentry rt;
+
++ if (replace) {
++ error("replacedefaultroute not supported on this platform");
++ return 0;
++ }
++
+ #if defined(__USLC__)
+ g = l; /* use the local address as gateway */
+ #endif
--- /dev/null
+Source: http://gaute.vetsj.com/tag/mppc/
+
+diff -urN ppp-2.4.4-old/include/linux/ppp-comp.h ppp-2.4.4-new/include/linux/ppp-comp.h
+--- ppp-2.4.4-old/include/linux/ppp-comp.h 2002-12-06 10:49:15.000000000 +0100
++++ ppp-2.4.4-new/include/linux/ppp-comp.h 2008-03-19 20:11:28.000000000 +0100
+@@ -36,7 +36,7 @@
+ */
+
+ /*
+- * ==FILEVERSION 20020319==
++ * ==FILEVERSION 20020715==
+ *
+ * NOTE TO MAINTAINERS:
+ * If you modify this file at all, please set the above date.
+@@ -86,7 +86,7 @@
+
+ /* Compress a packet */
+ int (*compress) (void *state, unsigned char *rptr,
+- unsigned char *obuf, int isize, int osize);
++ unsigned char *obuf, int isize, int osize);
+
+ /* Return compression statistics */
+ void (*comp_stat) (void *state, struct compstat *stats);
+@@ -107,7 +107,7 @@
+
+ /* Decompress a packet. */
+ int (*decompress) (void *state, unsigned char *ibuf, int isize,
+- unsigned char *obuf, int osize);
++ unsigned char *obuf, int osize);
+
+ /* Update state for an incompressible packet received */
+ void (*incomp) (void *state, unsigned char *ibuf, int icnt);
+@@ -288,6 +288,33 @@
+ opts |= MPPE_OPT_UNKNOWN; \
+ } while (/* CONSTCOND */ 0)
+
++/* MPPE/MPPC definitions by J.D.*/
++#define MPPE_STATELESS MPPE_H_BIT /* configuration bit H */
++#define MPPE_40BIT MPPE_L_BIT /* configuration bit L */
++#define MPPE_56BIT MPPE_M_BIT /* configuration bit M */
++#define MPPE_128BIT MPPE_S_BIT /* configuration bit S */
++#define MPPE_MPPC MPPE_C_BIT /* configuration bit C */
++
++/*
++ * Definitions for Stac LZS.
++ */
++
++#define CI_LZS 17 /* config option for Stac LZS */
++#define CILEN_LZS 5 /* length of config option */
++
++#define LZS_OVHD 4 /* max. LZS overhead */
++#define LZS_HIST_LEN 2048 /* LZS history size */
++#define LZS_MAX_CCOUNT 0x0FFF /* max. coherency counter value */
++
++#define LZS_MODE_NONE 0
++#define LZS_MODE_LCB 1
++#define LZS_MODE_CRC 2
++#define LZS_MODE_SEQ 3
++#define LZS_MODE_EXT 4
++
++#define LZS_EXT_BIT_FLUSHED 0x80 /* bit A */
++#define LZS_EXT_BIT_COMP 0x20 /* bit C */
++
+ /*
+ * Definitions for other, as yet unsupported, compression methods.
+ */
+diff -urN ppp-2.4.4-old/include/net/ppp-comp.h ppp-2.4.4-new/include/net/ppp-comp.h
+--- ppp-2.4.4-old/include/net/ppp-comp.h 2002-12-06 10:49:15.000000000 +0100
++++ ppp-2.4.4-new/include/net/ppp-comp.h 2008-03-19 20:11:28.000000000 +0100
+@@ -255,6 +255,33 @@
+ opts |= MPPE_OPT_UNKNOWN; \
+ } while (/* CONSTCOND */ 0)
+
++/* MPPE/MPPC definitions by J.D.*/
++#define MPPE_STATELESS MPPE_H_BIT /* configuration bit H */
++#define MPPE_40BIT MPPE_L_BIT /* configuration bit L */
++#define MPPE_56BIT MPPE_M_BIT /* configuration bit M */
++#define MPPE_128BIT MPPE_S_BIT /* configuration bit S */
++#define MPPE_MPPC MPPE_C_BIT /* configuration bit C */
++
++/*
++ * Definitions for Stac LZS.
++ */
++
++#define CI_LZS 17 /* config option for Stac LZS */
++#define CILEN_LZS 5 /* length of config option */
++
++#define LZS_OVHD 4 /* max. LZS overhead */
++#define LZS_HIST_LEN 2048 /* LZS history size */
++#define LZS_MAX_CCOUNT 0x0FFF /* max. coherency counter value */
++
++#define LZS_MODE_NONE 0
++#define LZS_MODE_LCB 1
++#define LZS_MODE_CRC 2
++#define LZS_MODE_SEQ 3
++#define LZS_MODE_EXT 4
++
++#define LZS_EXT_BIT_FLUSHED 0x80 /* bit A */
++#define LZS_EXT_BIT_COMP 0x20 /* bit C */
++
+ /*
+ * Definitions for other, as yet unsupported, compression methods.
+ */
+diff -urN ppp-2.4.4-old/pppd/ccp.c ppp-2.4.4-new/pppd/ccp.c
+--- ppp-2.4.4-old/pppd/ccp.c 2005-07-09 02:23:05.000000000 +0200
++++ ppp-2.4.4-new/pppd/ccp.c 2008-03-19 20:11:43.000000000 +0100
+@@ -62,12 +62,10 @@
+ static char bsd_value[8];
+ static char deflate_value[8];
+
+-/*
+- * Option variables.
+- */
+ #ifdef MPPE
+-bool refuse_mppe_stateful = 1; /* Allow stateful mode? */
+-#endif
++static int setmppe(char **);
++static int setnomppe(void);
++#endif /* MPPE */
+
+ static option_t ccp_option_list[] = {
+ { "noccp", o_bool, &ccp_protent.enabled_flag,
+@@ -108,54 +106,36 @@
+ "don't allow Predictor-1", OPT_ALIAS | OPT_PRIOSUB | OPT_A2CLR,
+ &ccp_allowoptions[0].predictor_1 },
+
++ { "lzs", o_bool, &ccp_wantoptions[0].lzs,
++ "request Stac LZS", 1, &ccp_allowoptions[0].lzs, OPT_PRIO },
++ { "+lzs", o_bool, &ccp_wantoptions[0].lzs,
++ "request Stac LZS", 1, &ccp_allowoptions[0].lzs, OPT_ALIAS | OPT_PRIO },
++ { "nolzs", o_bool, &ccp_wantoptions[0].lzs,
++ "don't allow Stac LZS", OPT_PRIOSUB | OPT_A2CLR,
++ &ccp_allowoptions[0].lzs },
++ { "-lzs", o_bool, &ccp_wantoptions[0].lzs,
++ "don't allow Stac LZS", OPT_ALIAS | OPT_PRIOSUB | OPT_A2CLR,
++ &ccp_allowoptions[0].lzs },
++
+ #ifdef MPPE
+- /* MPPE options are symmetrical ... we only set wantoptions here */
+- { "require-mppe", o_bool, &ccp_wantoptions[0].mppe,
+- "require MPPE encryption",
+- OPT_PRIO | MPPE_OPT_40 | MPPE_OPT_128 },
+- { "+mppe", o_bool, &ccp_wantoptions[0].mppe,
+- "require MPPE encryption",
+- OPT_ALIAS | OPT_PRIO | MPPE_OPT_40 | MPPE_OPT_128 },
+- { "nomppe", o_bool, &ccp_wantoptions[0].mppe,
+- "don't allow MPPE encryption", OPT_PRIO },
+- { "-mppe", o_bool, &ccp_wantoptions[0].mppe,
+- "don't allow MPPE encryption", OPT_ALIAS | OPT_PRIO },
+-
+- /* We use ccp_allowoptions[0].mppe as a junk var ... it is reset later */
+- { "require-mppe-40", o_bool, &ccp_allowoptions[0].mppe,
+- "require MPPE 40-bit encryption", OPT_PRIO | OPT_A2OR | MPPE_OPT_40,
+- &ccp_wantoptions[0].mppe },
+- { "+mppe-40", o_bool, &ccp_allowoptions[0].mppe,
+- "require MPPE 40-bit encryption", OPT_PRIO | OPT_A2OR | MPPE_OPT_40,
+- &ccp_wantoptions[0].mppe },
+- { "nomppe-40", o_bool, &ccp_allowoptions[0].mppe,
+- "don't allow MPPE 40-bit encryption",
+- OPT_PRIOSUB | OPT_A2CLRB | MPPE_OPT_40, &ccp_wantoptions[0].mppe },
+- { "-mppe-40", o_bool, &ccp_allowoptions[0].mppe,
+- "don't allow MPPE 40-bit encryption",
+- OPT_ALIAS | OPT_PRIOSUB | OPT_A2CLRB | MPPE_OPT_40,
+- &ccp_wantoptions[0].mppe },
+-
+- { "require-mppe-128", o_bool, &ccp_allowoptions[0].mppe,
+- "require MPPE 128-bit encryption", OPT_PRIO | OPT_A2OR | MPPE_OPT_128,
+- &ccp_wantoptions[0].mppe },
+- { "+mppe-128", o_bool, &ccp_allowoptions[0].mppe,
+- "require MPPE 128-bit encryption",
+- OPT_ALIAS | OPT_PRIO | OPT_A2OR | MPPE_OPT_128,
+- &ccp_wantoptions[0].mppe },
+- { "nomppe-128", o_bool, &ccp_allowoptions[0].mppe,
+- "don't allow MPPE 128-bit encryption",
+- OPT_PRIOSUB | OPT_A2CLRB | MPPE_OPT_128, &ccp_wantoptions[0].mppe },
+- { "-mppe-128", o_bool, &ccp_allowoptions[0].mppe,
+- "don't allow MPPE 128-bit encryption",
+- OPT_ALIAS | OPT_PRIOSUB | OPT_A2CLRB | MPPE_OPT_128,
+- &ccp_wantoptions[0].mppe },
+-
+- /* strange one; we always request stateless, but will we allow stateful? */
+- { "mppe-stateful", o_bool, &refuse_mppe_stateful,
+- "allow MPPE stateful mode", OPT_PRIO },
+- { "nomppe-stateful", o_bool, &refuse_mppe_stateful,
+- "disallow MPPE stateful mode", OPT_PRIO | 1 },
++ { "mppc", o_bool, &ccp_wantoptions[0].mppc,
++ "request MPPC compression", 1, &ccp_allowoptions[0].mppc },
++ { "+mppc", o_bool, &ccp_wantoptions[0].mppc,
++ "request MPPC compression", 1, &ccp_allowoptions[0].mppc, OPT_ALIAS },
++ { "nomppc", o_bool, &ccp_wantoptions[0].mppc,
++ "don't allow MPPC compression", OPT_PRIOSUB | OPT_A2CLR,
++ &ccp_allowoptions[0].mppc },
++ { "-mppc", o_bool, &ccp_wantoptions[0].mppc,
++ "don't allow MPPC compression", OPT_ALIAS | OPT_PRIOSUB | OPT_A2CLR,
++ &ccp_allowoptions[0].mppc },
++ { "mppe", o_special, (void *)setmppe,
++ "request MPPE encryption" },
++ { "+mppe", o_special, (void *)setmppe,
++ "request MPPE encryption" },
++ { "nomppe", o_special_noarg, (void *)setnomppe,
++ "don't allow MPPE encryption" },
++ { "-mppe", o_special_noarg, (void *)setnomppe,
++ "don't allow MPPE encryption" },
+ #endif /* MPPE */
+
+ { NULL }
+@@ -241,7 +221,7 @@
+ */
+ #define ANY_COMPRESS(opt) ((opt).deflate || (opt).bsd_compress \
+ || (opt).predictor_1 || (opt).predictor_2 \
+- || (opt).mppe)
++ || (opt).lzs || (opt).mppc || (opt).mppe)
+
+ /*
+ * Local state (mainly for handling reset-reqs and reset-acks).
+@@ -344,6 +324,100 @@
+ return 1;
+ }
+
++#ifdef MPPE
++/*
++ * Functions called from config options
++ */
++/*
++ MPPE suboptions:
++ required - require MPPE; disconnect if peer doesn't support it
++ stateless - use stateless mode
++ no40 - disable 40 bit keys
++ no56 - disable 56 bit keys
++ no128 - disable 128 bit keys
++*/
++int setmppe(char **argv)
++{
++ int i;
++ char *str, cmdbuf[16];
++
++ ccp_allowoptions[0].mppe = 1;
++ ccp_allowoptions[0].mppe_40 = 1;
++ ccp_allowoptions[0].mppe_56 = 1;
++ ccp_allowoptions[0].mppe_128 = 1;
++ ccp_allowoptions[0].mppe_stateless = 0;
++ ccp_wantoptions[0].mppe = 0;
++
++ str = *argv;
++
++ while (1) {
++ i = 0;
++ memset(cmdbuf, '\0', 16);
++ while ((i < 16) && (*str != ',') && (*str != '\0'))
++ cmdbuf[i++] = *str++;
++ cmdbuf[i] = '\0';
++ if (!strncasecmp(cmdbuf, "no40", strlen("no40"))) {
++ ccp_allowoptions[0].mppe_40 = 0;
++ goto next_param;
++ } else if (!strncasecmp(cmdbuf, "no56", strlen("no56"))) {
++ ccp_allowoptions[0].mppe_56 = 0;
++ goto next_param;
++ } else if (!strncasecmp(cmdbuf, "no128", strlen("no128"))) {
++ ccp_allowoptions[0].mppe_128 = 0;
++ goto next_param;
++ } else if (!strncasecmp(cmdbuf, "stateless", strlen("stateless"))) {
++ ccp_allowoptions[0].mppe_stateless = 1;
++ goto next_param;
++ } else if (!strncasecmp(cmdbuf, "required", strlen("required"))) {
++ ccp_wantoptions[0].mppe = 1;
++ goto next_param;
++ } else {
++ option_error("invalid parameter '%s' for mppe option", cmdbuf);
++ return 0;
++ }
++
++ next_param:
++ if (*str == ',') {
++ str++;
++ continue;
++ }
++ if (*str == '\0') {
++ if (!(ccp_allowoptions[0].mppe_40 || ccp_allowoptions[0].mppe_56 ||
++ ccp_allowoptions[0].mppe_128)) {
++ if (ccp_wantoptions[0].mppe == 1) {
++ option_error("You require MPPE but you have switched off "
++ "all encryption key lengths.");
++ return 0;
++ }
++ ccp_wantoptions[0].mppe = ccp_allowoptions[0].mppe = 0;
++ ccp_wantoptions[0].mppe_stateless =
++ ccp_allowoptions[0].mppe_stateless = 0;
++ } else {
++ ccp_allowoptions[0].mppe = 1;
++ ccp_wantoptions[0].mppe_stateless =
++ ccp_allowoptions[0].mppe_stateless;
++ if (ccp_wantoptions[0].mppe == 1) {
++ ccp_wantoptions[0].mppe_40 = ccp_allowoptions[0].mppe_40;
++ ccp_wantoptions[0].mppe_56 = ccp_allowoptions[0].mppe_56;
++ ccp_wantoptions[0].mppe_128 = ccp_allowoptions[0].mppe_128;
++ }
++ }
++ return 1;
++ }
++ }
++}
++
++int setnomppe(void)
++{
++ ccp_wantoptions[0].mppe = ccp_allowoptions[0].mppe = 0;
++ ccp_wantoptions[0].mppe_40 = ccp_allowoptions[0].mppe_40 = 0;
++ ccp_wantoptions[0].mppe_56 = ccp_allowoptions[0].mppe_56 = 0;
++ ccp_wantoptions[0].mppe_128 = ccp_allowoptions[0].mppe_128 = 0;
++ ccp_wantoptions[0].mppe_stateless = ccp_allowoptions[0].mppe_stateless = 0;
++ return 1;
++}
++#endif /* MPPE */
++
+ /*
+ * ccp_init - initialize CCP.
+ */
+@@ -378,6 +452,30 @@
+ ccp_allowoptions[0].bsd_bits = BSD_MAX_BITS;
+
+ ccp_allowoptions[0].predictor_1 = 1;
++
++ ccp_wantoptions[0].lzs = 0; /* Stac LZS - will be enabled in the future */
++ ccp_wantoptions[0].lzs_mode = LZS_MODE_SEQ;
++ ccp_wantoptions[0].lzs_hists = 1;
++ ccp_allowoptions[0].lzs = 0; /* Stac LZS - will be enabled in the future */
++ ccp_allowoptions[0].lzs_mode = LZS_MODE_SEQ;
++ ccp_allowoptions[0].lzs_hists = 1;
++
++#ifdef MPPE
++ /* by default allow and request MPPC... */
++ ccp_wantoptions[0].mppc = ccp_allowoptions[0].mppc = 1;
++
++ /* ... and allow but don't request MPPE */
++ ccp_allowoptions[0].mppe = 1;
++ ccp_allowoptions[0].mppe_40 = 1;
++ ccp_allowoptions[0].mppe_56 = 1;
++ ccp_allowoptions[0].mppe_128 = 1;
++ ccp_allowoptions[0].mppe_stateless = 1;
++ ccp_wantoptions[0].mppe = 0;
++ ccp_wantoptions[0].mppe_40 = 0;
++ ccp_wantoptions[0].mppe_56 = 0;
++ ccp_wantoptions[0].mppe_128 = 0;
++ ccp_wantoptions[0].mppe_stateless = 0;
++#endif /* MPPE */
+ }
+
+ /*
+@@ -455,11 +553,11 @@
+ if (oldstate == OPENED && p[0] == TERMREQ && f->state != OPENED) {
+ notice("Compression disabled by peer.");
+ #ifdef MPPE
+- if (ccp_gotoptions[unit].mppe) {
++ if (ccp_wantoptions[unit].mppe) {
+ error("MPPE disabled, closing LCP");
+ lcp_close(unit, "MPPE disabled by peer");
+ }
+-#endif
++#endif /* MPPE */
+ }
+
+ /*
+@@ -487,6 +585,15 @@
+ break;
+ /* send a reset-ack, which the transmitter will see and
+ reset its compression state. */
++
++ /* In case of MPPE/MPPC or LZS we shouldn't send CCP_RESETACK,
++ but we do it in order to reset compressor; CCP_RESETACK is
++ then silently discarded. See functions ppp_send_frame and
++ ppp_ccp_peek in ppp_generic.c (Linux only !!!). All the
++ confusion is caused by the fact that CCP code is splited
++ into two parts - one part is handled by pppd, the other one
++ is handled by kernel. */
++
+ fsm_sdata(f, CCP_RESETACK, id, NULL, 0);
+ break;
+
+@@ -515,12 +622,11 @@
+ fsm_lowerdown(&ccp_fsm[unit]);
+
+ #ifdef MPPE
+- if (ccp_gotoptions[unit].mppe) {
++ if (ccp_wantoptions[unit].mppe) {
+ error("MPPE required but peer negotiation failed");
+ lcp_close(unit, "MPPE required but peer negotiation failed");
+ }
+-#endif
+-
++#endif /* MPPE */
+ }
+
+ /*
+@@ -537,7 +643,7 @@
+ all_rejected[f->unit] = 0;
+
+ #ifdef MPPE
+- if (go->mppe) {
++ if (go->mppe || go->mppc) {
+ ccp_options *ao = &ccp_allowoptions[f->unit];
+ int auth_mschap_bits = auth_done[f->unit];
+ int numbits;
+@@ -551,80 +657,109 @@
+ * NB: If MPPE is required, all other compression opts are invalid.
+ * So, we return right away if we can't do it.
+ */
++ if (ccp_wantoptions[f->unit].mppe) {
++ /* Leave only the mschap auth bits set */
++ auth_mschap_bits &= (CHAP_MS_WITHPEER | CHAP_MS_PEER |
++ CHAP_MS2_WITHPEER | CHAP_MS2_PEER);
++ /* Count the mschap auths */
++ auth_mschap_bits >>= CHAP_MS_SHIFT;
++ numbits = 0;
++ do {
++ numbits += auth_mschap_bits & 1;
++ auth_mschap_bits >>= 1;
++ } while (auth_mschap_bits);
++ if (numbits > 1) {
++ error("MPPE required, but auth done in both directions.");
++ lcp_close(f->unit, "MPPE required but not available");
++ return;
++ }
++ if (!numbits) {
++ error("MPPE required, but MS-CHAP[v2] auth not performed.");
++ lcp_close(f->unit, "MPPE required but not available");
++ return;
++ }
+
+- /* Leave only the mschap auth bits set */
+- auth_mschap_bits &= (CHAP_MS_WITHPEER | CHAP_MS_PEER |
+- CHAP_MS2_WITHPEER | CHAP_MS2_PEER);
+- /* Count the mschap auths */
+- auth_mschap_bits >>= CHAP_MS_SHIFT;
+- numbits = 0;
+- do {
+- numbits += auth_mschap_bits & 1;
+- auth_mschap_bits >>= 1;
+- } while (auth_mschap_bits);
+- if (numbits > 1) {
+- error("MPPE required, but auth done in both directions.");
+- lcp_close(f->unit, "MPPE required but not available");
+- return;
+- }
+- if (!numbits) {
+- error("MPPE required, but MS-CHAP[v2] auth not performed.");
+- lcp_close(f->unit, "MPPE required but not available");
+- return;
+- }
+-
+- /* A plugin (eg radius) may not have obtained key material. */
+- if (!mppe_keys_set) {
+- error("MPPE required, but keys are not available. "
+- "Possible plugin problem?");
+- lcp_close(f->unit, "MPPE required but not available");
+- return;
+- }
+-
+- /* LM auth not supported for MPPE */
+- if (auth_done[f->unit] & (CHAP_MS_WITHPEER | CHAP_MS_PEER)) {
+- /* This might be noise */
+- if (go->mppe & MPPE_OPT_40) {
+- notice("Disabling 40-bit MPPE; MS-CHAP LM not supported");
+- go->mppe &= ~MPPE_OPT_40;
+- ccp_wantoptions[f->unit].mppe &= ~MPPE_OPT_40;
++ /* A plugin (eg radius) may not have obtained key material. */
++ if (!mppe_keys_set) {
++ error("MPPE required, but keys are not available. "
++ "Possible plugin problem?");
++ lcp_close(f->unit, "MPPE required but not available");
++ return;
+ }
+ }
+
+- /* Last check: can we actually negotiate something? */
+- if (!(go->mppe & (MPPE_OPT_40 | MPPE_OPT_128))) {
+- /* Could be misconfig, could be 40-bit disabled above. */
+- error("MPPE required, but both 40-bit and 128-bit disabled.");
+- lcp_close(f->unit, "MPPE required but not available");
+- return;
++ /*
++ * Check whether the kernel knows about the various
++ * compression methods we might request. Key material
++ * unimportant here.
++ */
++ if (go->mppc) {
++ opt_buf[0] = CI_MPPE;
++ opt_buf[1] = CILEN_MPPE;
++ opt_buf[2] = 0;
++ opt_buf[3] = 0;
++ opt_buf[4] = 0;
++ opt_buf[5] = MPPE_MPPC;
++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE, 0) <= 0)
++ go->mppc = 0;
++ }
++ if (go->mppe_40) {
++ opt_buf[0] = CI_MPPE;
++ opt_buf[1] = CILEN_MPPE;
++ opt_buf[2] = MPPE_STATELESS;
++ opt_buf[3] = 0;
++ opt_buf[4] = 0;
++ opt_buf[5] = MPPE_40BIT;
++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE + MPPE_MAX_KEY_LEN, 0) <= 0)
++ go->mppe_40 = 0;
++ }
++ if (go->mppe_56) {
++ opt_buf[0] = CI_MPPE;
++ opt_buf[1] = CILEN_MPPE;
++ opt_buf[2] = MPPE_STATELESS;
++ opt_buf[3] = 0;
++ opt_buf[4] = 0;
++ opt_buf[5] = MPPE_56BIT;
++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE + MPPE_MAX_KEY_LEN, 0) <= 0)
++ go->mppe_56 = 0;
++ }
++ if (go->mppe_128) {
++ opt_buf[0] = CI_MPPE;
++ opt_buf[1] = CILEN_MPPE;
++ opt_buf[2] = MPPE_STATELESS;
++ opt_buf[3] = 0;
++ opt_buf[4] = 0;
++ opt_buf[5] = MPPE_128BIT;
++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE + MPPE_MAX_KEY_LEN, 0) <= 0)
++ go->mppe_128 = 0;
++ }
++ if (!go->mppe_40 && !go->mppe_56 && !go->mppe_128) {
++ if (ccp_wantoptions[f->unit].mppe) {
++ error("MPPE required, but kernel has no support.");
++ lcp_close(f->unit, "MPPE required but not available");
++ }
++ go->mppe = go->mppe_stateless = 0;
++ } else {
++ /* MPPE is not compatible with other compression types */
++ if (ccp_wantoptions[f->unit].mppe) {
++ ao->bsd_compress = go->bsd_compress = 0;
++ ao->predictor_1 = go->predictor_1 = 0;
++ ao->predictor_2 = go->predictor_2 = 0;
++ ao->deflate = go->deflate = 0;
++ ao->lzs = go->lzs = 0;
++ }
+ }
+-
+- /* sync options */
+- ao->mppe = go->mppe;
+- /* MPPE is not compatible with other compression types */
+- ao->bsd_compress = go->bsd_compress = 0;
+- ao->predictor_1 = go->predictor_1 = 0;
+- ao->predictor_2 = go->predictor_2 = 0;
+- ao->deflate = go->deflate = 0;
+ }
+ #endif /* MPPE */
+-
+- /*
+- * Check whether the kernel knows about the various
+- * compression methods we might request.
+- */
+-#ifdef MPPE
+- if (go->mppe) {
+- opt_buf[0] = CI_MPPE;
+- opt_buf[1] = CILEN_MPPE;
+- MPPE_OPTS_TO_CI(go->mppe, &opt_buf[2]);
+- /* Key material unimportant here. */
+- if (ccp_test(f->unit, opt_buf, CILEN_MPPE + MPPE_MAX_KEY_LEN, 0) <= 0) {
+- error("MPPE required, but kernel has no support.");
+- lcp_close(f->unit, "MPPE required but not available");
+- }
++ if (go->lzs) {
++ opt_buf[0] = CI_LZS;
++ opt_buf[1] = CILEN_LZS;
++ opt_buf[2] = go->lzs_hists >> 8;
++ opt_buf[3] = go->lzs_hists & 0xff;
++ opt_buf[4] = LZS_MODE_SEQ;
++ if (ccp_test(f->unit, opt_buf, CILEN_LZS, 0) <= 0)
++ go->lzs = 0;
+ }
+-#endif
+ if (go->bsd_compress) {
+ opt_buf[0] = CI_BSD_COMPRESS;
+ opt_buf[1] = CILEN_BSD_COMPRESS;
+@@ -679,7 +814,8 @@
+ + (go->deflate? CILEN_DEFLATE: 0)
+ + (go->predictor_1? CILEN_PREDICTOR_1: 0)
+ + (go->predictor_2? CILEN_PREDICTOR_2: 0)
+- + (go->mppe? CILEN_MPPE: 0);
++ + (go->lzs? CILEN_LZS: 0)
++ + ((go->mppe || go->mppc)? CILEN_MPPE: 0);
+ }
+
+ /*
+@@ -693,6 +829,8 @@
+ {
+ int res;
+ ccp_options *go = &ccp_gotoptions[f->unit];
++ ccp_options *ao = &ccp_allowoptions[f->unit];
++ ccp_options *wo = &ccp_wantoptions[f->unit];
+ u_char *p0 = p;
+
+ /*
+@@ -701,22 +839,43 @@
+ * in case it gets Acked.
+ */
+ #ifdef MPPE
+- if (go->mppe) {
++ if (go->mppe || go->mppc || (!wo->mppe && ao->mppe)) {
+ u_char opt_buf[CILEN_MPPE + MPPE_MAX_KEY_LEN];
+
+- p[0] = opt_buf[0] = CI_MPPE;
+- p[1] = opt_buf[1] = CILEN_MPPE;
+- MPPE_OPTS_TO_CI(go->mppe, &p[2]);
+- MPPE_OPTS_TO_CI(go->mppe, &opt_buf[2]);
++ p[0] = CI_MPPE;
++ p[1] = CILEN_MPPE;
++ p[2] = (go->mppe_stateless ? MPPE_STATELESS : 0);
++ p[3] = 0;
++ p[4] = 0;
++ p[5] = (go->mppe_40 ? MPPE_40BIT : 0) | (go->mppe_56 ? MPPE_56BIT : 0) |
++ (go->mppe_128 ? MPPE_128BIT : 0) | (go->mppc ? MPPE_MPPC : 0);
++
++ BCOPY(p, opt_buf, CILEN_MPPE);
+ BCOPY(mppe_recv_key, &opt_buf[CILEN_MPPE], MPPE_MAX_KEY_LEN);
+ res = ccp_test(f->unit, opt_buf, CILEN_MPPE + MPPE_MAX_KEY_LEN, 0);
+- if (res > 0)
++ if (res > 0) {
+ p += CILEN_MPPE;
+- else
++ } else {
+ /* This shouldn't happen, we've already tested it! */
+- lcp_close(f->unit, "MPPE required but not available in kernel");
++ go->mppe = go->mppe_40 = go->mppe_56 = go->mppe_128 =
++ go->mppe_stateless = go->mppc = 0;
++ if (ccp_wantoptions[f->unit].mppe)
++ lcp_close(f->unit, "MPPE required but not available in kernel");
++ }
++ }
++#endif /* MPPE */
++ if (go->lzs) {
++ p[0] = CI_LZS;
++ p[1] = CILEN_LZS;
++ p[2] = go->lzs_hists >> 8;
++ p[3] = go->lzs_hists & 0xff;
++ p[4] = LZS_MODE_SEQ;
++ res = ccp_test(f->unit, p, CILEN_LZS, 0);
++ if (res > 0) {
++ p += CILEN_LZS;
++ } else
++ go->lzs = 0;
+ }
+-#endif
+ if (go->deflate) {
+ p[0] = go->deflate_correct? CI_DEFLATE: CI_DEFLATE_DRAFT;
+ p[1] = CILEN_DEFLATE;
+@@ -802,7 +961,7 @@
+
+ /*
+ * ccp_ackci - process a received configure-ack, and return
+- * 1 iff the packet was OK.
++ * 1 if the packet was OK.
+ */
+ static int
+ ccp_ackci(f, p, len)
+@@ -811,24 +970,44 @@
+ int len;
+ {
+ ccp_options *go = &ccp_gotoptions[f->unit];
++ ccp_options *ao = &ccp_allowoptions[f->unit];
++ ccp_options *wo = &ccp_wantoptions[f->unit];
+ u_char *p0 = p;
+
+ #ifdef MPPE
+- if (go->mppe) {
+- u_char opt_buf[CILEN_MPPE];
+-
+- opt_buf[0] = CI_MPPE;
+- opt_buf[1] = CILEN_MPPE;
+- MPPE_OPTS_TO_CI(go->mppe, &opt_buf[2]);
+- if (len < CILEN_MPPE || memcmp(opt_buf, p, CILEN_MPPE))
++ if (go->mppe || go->mppc || (!wo->mppe && ao->mppe)) {
++ if (len < CILEN_MPPE
++ || p[1] != CILEN_MPPE || p[0] != CI_MPPE
++ || p[2] != (go->mppe_stateless ? MPPE_STATELESS : 0)
++ || p[3] != 0
++ || p[4] != 0
++ || (p[5] != ((go->mppe_40 ? MPPE_40BIT : 0) |
++ (go->mppc ? MPPE_MPPC : 0))
++ && p[5] != ((go->mppe_56 ? MPPE_56BIT : 0) |
++ (go->mppc ? MPPE_MPPC : 0))
++ && p[5] != ((go->mppe_128 ? MPPE_128BIT : 0) |
++ (go->mppc ? MPPE_MPPC : 0))))
+ return 0;
++ if (go->mppe_40 || go->mppe_56 || go->mppe_128)
++ go->mppe = 1;
+ p += CILEN_MPPE;
+ len -= CILEN_MPPE;
++ /* Cope with first/fast ack */
++ if (p == p0 && len == 0)
++ return 1;
++ }
++#endif /* MPPE */
++ if (go->lzs) {
++ if (len < CILEN_LZS || p[0] != CI_LZS || p[1] != CILEN_LZS
++ || p[2] != go->lzs_hists>>8 || p[3] != (go->lzs_hists&0xff)
++ || p[4] != LZS_MODE_SEQ)
++ return 0;
++ p += CILEN_LZS;
++ len -= CILEN_LZS;
+ /* XXX Cope with first/fast ack */
+- if (len == 0)
++ if (p == p0 && len == 0)
+ return 1;
+ }
+-#endif
+ if (go->deflate) {
+ if (len < CILEN_DEFLATE
+ || p[0] != (go->deflate_correct? CI_DEFLATE: CI_DEFLATE_DRAFT)
+@@ -891,7 +1070,7 @@
+
+ /*
+ * ccp_nakci - process received configure-nak.
+- * Returns 1 iff the nak was OK.
++ * Returns 1 if the nak was OK.
+ */
+ static int
+ ccp_nakci(f, p, len, treat_as_reject)
+@@ -901,6 +1080,8 @@
+ int treat_as_reject;
+ {
+ ccp_options *go = &ccp_gotoptions[f->unit];
++ ccp_options *ao = &ccp_allowoptions[f->unit];
++ ccp_options *wo = &ccp_wantoptions[f->unit];
+ ccp_options no; /* options we've seen already */
+ ccp_options try; /* options to ask for next time */
+
+@@ -908,28 +1089,100 @@
+ try = *go;
+
+ #ifdef MPPE
+- if (go->mppe && len >= CILEN_MPPE
+- && p[0] == CI_MPPE && p[1] == CILEN_MPPE) {
+- no.mppe = 1;
+- /*
+- * Peer wants us to use a different strength or other setting.
+- * Fail if we aren't willing to use his suggestion.
+- */
+- MPPE_CI_TO_OPTS(&p[2], try.mppe);
+- if ((try.mppe & MPPE_OPT_STATEFUL) && refuse_mppe_stateful) {
+- error("Refusing MPPE stateful mode offered by peer");
+- try.mppe = 0;
+- } else if (((go->mppe | MPPE_OPT_STATEFUL) & try.mppe) != try.mppe) {
+- /* Peer must have set options we didn't request (suggest) */
+- try.mppe = 0;
+- }
++ if ((go->mppe || go->mppc || (!wo->mppe && ao->mppe)) &&
++ len >= CILEN_MPPE && p[0] == CI_MPPE && p[1] == CILEN_MPPE) {
+
+- if (!try.mppe) {
+- error("MPPE required but peer negotiation failed");
+- lcp_close(f->unit, "MPPE required but peer negotiation failed");
++ if (go->mppc) {
++ no.mppc = 1;
++ if (!(p[5] & MPPE_MPPC))
++ try.mppc = 0;
++ }
++
++ if (go->mppe)
++ no.mppe = 1;
++ if (go->mppe_40)
++ no.mppe_40 = 1;
++ if (go->mppe_56)
++ no.mppe_56 = 1;
++ if (go->mppe_128)
++ no.mppe_128 = 1;
++ if (go->mppe_stateless)
++ no.mppe_stateless = 1;
++
++ if (ao->mppe_40) {
++ if ((p[5] & MPPE_40BIT))
++ try.mppe_40 = 1;
++ else
++ try.mppe_40 = (p[5] == 0) ? 1 : 0;
++ }
++ if (ao->mppe_56) {
++ if ((p[5] & MPPE_56BIT))
++ try.mppe_56 = 1;
++ else
++ try.mppe_56 = (p[5] == 0) ? 1 : 0;
++ }
++ if (ao->mppe_128) {
++ if ((p[5] & MPPE_128BIT))
++ try.mppe_128 = 1;
++ else
++ try.mppe_128 = (p[5] == 0) ? 1 : 0;
++ }
++
++ if (ao->mppe_stateless) {
++ if ((p[2] & MPPE_STATELESS) || wo->mppe_stateless)
++ try.mppe_stateless = 1;
++ else
++ try.mppe_stateless = 0;
++ }
++
++ if (!try.mppe_56 && !try.mppe_40 && !try.mppe_128) {
++ try.mppe = try.mppe_stateless = 0;
++ if (wo->mppe) {
++ /* we require encryption, but peer doesn't support it
++ so we close connection */
++ wo->mppc = wo->mppe = wo->mppe_stateless = wo->mppe_40 =
++ wo->mppe_56 = wo->mppe_128 = 0;
++ lcp_close(f->unit, "MPPE required but cannot negotiate MPPE "
++ "key length");
++ }
++ }
++ if (wo->mppe && (wo->mppe_40 != try.mppe_40) &&
++ (wo->mppe_56 != try.mppe_56) && (wo->mppe_128 != try.mppe_128)) {
++ /* cannot negotiate key length */
++ wo->mppc = wo->mppe = wo->mppe_stateless = wo->mppe_40 =
++ wo->mppe_56 = wo->mppe_128 = 0;
++ lcp_close(f->unit, "Cannot negotiate MPPE key length");
+ }
++ if (try.mppe_40 && try.mppe_56 && try.mppe_128)
++ try.mppe_40 = try.mppe_56 = 0;
++ else
++ if (try.mppe_56 && try.mppe_128)
++ try.mppe_56 = 0;
++ else
++ if (try.mppe_40 && try.mppe_128)
++ try.mppe_40 = 0;
++ else
++ if (try.mppe_40 && try.mppe_56)
++ try.mppe_40 = 0;
++
++ p += CILEN_MPPE;
++ len -= CILEN_MPPE;
+ }
+ #endif /* MPPE */
++
++ if (go->lzs && len >= CILEN_LZS && p[0] == CI_LZS && p[1] == CILEN_LZS) {
++ no.lzs = 1;
++ if (((p[2]<<8)|p[3]) > 1 || (p[4] != LZS_MODE_SEQ &&
++ p[4] != LZS_MODE_EXT))
++ try.lzs = 0;
++ else {
++ try.lzs_mode = p[4];
++ try.lzs_hists = (p[2] << 8) | p[3];
++ }
++ p += CILEN_LZS;
++ len -= CILEN_LZS;
++ }
++
+ if (go->deflate && len >= CILEN_DEFLATE
+ && p[0] == (go->deflate_correct? CI_DEFLATE: CI_DEFLATE_DRAFT)
+ && p[1] == CILEN_DEFLATE) {
+@@ -1002,14 +1255,50 @@
+ return -1;
+
+ #ifdef MPPE
+- if (go->mppe && len >= CILEN_MPPE
++ if ((go->mppe || go->mppc) && len >= CILEN_MPPE
+ && p[0] == CI_MPPE && p[1] == CILEN_MPPE) {
+- error("MPPE required but peer refused");
+- lcp_close(f->unit, "MPPE required but peer refused");
++ ccp_options *wo = &ccp_wantoptions[f->unit];
++ if (p[2] != (go->mppe_stateless ? MPPE_STATELESS : 0) ||
++ p[3] != 0 ||
++ p[4] != 0 ||
++ p[5] != ((go->mppe_40 ? MPPE_40BIT : 0) |
++ (go->mppe_56 ? MPPE_56BIT : 0) |
++ (go->mppe_128 ? MPPE_128BIT : 0) |
++ (go->mppc ? MPPE_MPPC : 0)))
++ return 0;
++ if (go->mppc)
++ try.mppc = 0;
++ if (go->mppe) {
++ try.mppe = 0;
++ if (go->mppe_40)
++ try.mppe_40 = 0;
++ if (go->mppe_56)
++ try.mppe_56 = 0;
++ if (go->mppe_128)
++ try.mppe_128 = 0;
++ if (go->mppe_stateless)
++ try.mppe_stateless = 0;
++ if (!try.mppe_56 && !try.mppe_40 && !try.mppe_128)
++ try.mppe = try.mppe_stateless = 0;
++ if (wo->mppe) { /* we want MPPE but cannot negotiate key length */
++ wo->mppc = wo->mppe = wo->mppe_stateless = wo->mppe_40 =
++ wo->mppe_56 = wo->mppe_128 = 0;
++ lcp_close(f->unit, "MPPE required but cannot negotiate MPPE "
++ "key length");
++ }
++ }
+ p += CILEN_MPPE;
+ len -= CILEN_MPPE;
+ }
+-#endif
++#endif /* MPPE */
++ if (go->lzs && len >= CILEN_LZS && p[0] == CI_LZS && p[1] == CILEN_LZS) {
++ if (p[2] != go->lzs_hists>>8 || p[3] != (go->lzs_hists&0xff)
++ || p[4] != go->lzs_mode)
++ return 0;
++ try.lzs = 0;
++ p += CILEN_LZS;
++ len -= CILEN_LZS;
++ }
+ if (go->deflate_correct && len >= CILEN_DEFLATE
+ && p[0] == CI_DEFLATE && p[1] == CILEN_DEFLATE) {
+ if (p[2] != DEFLATE_MAKE_OPT(go->deflate_size)
+@@ -1073,14 +1362,15 @@
+ int dont_nak;
+ {
+ int ret, newret, res;
+- u_char *p0, *retp;
++ u_char *p0, *retp, p2, p5;
+ int len, clen, type, nb;
+ ccp_options *ho = &ccp_hisoptions[f->unit];
+ ccp_options *ao = &ccp_allowoptions[f->unit];
++ ccp_options *wo = &ccp_wantoptions[f->unit];
+ #ifdef MPPE
+- bool rej_for_ci_mppe = 1; /* Are we rejecting based on a bad/missing */
+- /* CI_MPPE, or due to other options? */
+-#endif
++ u_char opt_buf[CILEN_MPPE + MPPE_MAX_KEY_LEN];
++/* int mtu; */
++#endif /* MPPE */
+
+ ret = CONFACK;
+ retp = p0 = p;
+@@ -1103,106 +1393,276 @@
+ switch (type) {
+ #ifdef MPPE
+ case CI_MPPE:
+- if (!ao->mppe || clen != CILEN_MPPE) {
++ if ((!ao->mppc && !ao->mppe) || clen != CILEN_MPPE) {
+ newret = CONFREJ;
+ break;
+ }
+- MPPE_CI_TO_OPTS(&p[2], ho->mppe);
+
+- /* Nak if anything unsupported or unknown are set. */
+- if (ho->mppe & MPPE_OPT_UNSUPPORTED) {
++ p2 = p[2];
++ p5 = p[5];
++ /* not sure what they want, tell 'em what we got */
++ if (((p[2] & ~MPPE_STATELESS) != 0 || p[3] != 0 || p[4] != 0 ||
++ (p[5] & ~(MPPE_40BIT | MPPE_56BIT | MPPE_128BIT |
++ MPPE_MPPC)) != 0 || p[5] == 0) ||
++ (p[2] == 0 && p[3] == 0 && p[4] == 0 && p[5] == 0)) {
+ newret = CONFNAK;
+- ho->mppe &= ~MPPE_OPT_UNSUPPORTED;
+- }
+- if (ho->mppe & MPPE_OPT_UNKNOWN) {
+- newret = CONFNAK;
+- ho->mppe &= ~MPPE_OPT_UNKNOWN;
+- }
+-
+- /* Check state opt */
+- if (ho->mppe & MPPE_OPT_STATEFUL) {
+- /*
+- * We can Nak and request stateless, but it's a
+- * lot easier to just assume the peer will request
+- * it if he can do it; stateful mode is bad over
+- * the Internet -- which is where we expect MPPE.
+- */
+- if (refuse_mppe_stateful) {
+- error("Refusing MPPE stateful mode offered by peer");
++ p[2] = (wo->mppe_stateless ? MPPE_STATELESS : 0);
++ p[3] = 0;
++ p[4] = 0;
++ p[5] = (wo->mppe_40 ? MPPE_40BIT : 0) |
++ (wo->mppe_56 ? MPPE_56BIT : 0) |
++ (wo->mppe_128 ? MPPE_128BIT : 0) |
++ (wo->mppc ? MPPE_MPPC : 0);
++ break;
++ }
++
++ if ((p[5] & MPPE_MPPC)) {
++ if (ao->mppc) {
++ ho->mppc = 1;
++ BCOPY(p, opt_buf, CILEN_MPPE);
++ opt_buf[2] = opt_buf[3] = opt_buf[4] = 0;
++ opt_buf[5] = MPPE_MPPC;
++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE, 1) <= 0) {
++ ho->mppc = 0;
++ p[5] &= ~MPPE_MPPC;
++ newret = CONFNAK;
++ }
++ } else {
+ newret = CONFREJ;
+- break;
+- }
++ if (wo->mppe || ao->mppe) {
++ p[5] &= ~MPPE_MPPC;
++ newret = CONFNAK;
++ }
++ }
++ }
++
++ if (ao->mppe)
++ ho->mppe = 1;
++
++ if ((p[2] & MPPE_STATELESS)) {
++ if (ao->mppe_stateless) {
++ if (wo->mppe_stateless)
++ ho->mppe_stateless = 1;
++ else {
++ newret = CONFNAK;
++ if (!dont_nak)
++ p[2] &= ~MPPE_STATELESS;
++ }
++ } else {
++ newret = CONFNAK;
++ if (!dont_nak)
++ p[2] &= ~MPPE_STATELESS;
++ }
++ } else {
++ if (wo->mppe_stateless && !dont_nak) {
++ wo->mppe_stateless = 0;
++ newret = CONFNAK;
++ p[2] |= MPPE_STATELESS;
++ }
+ }
+
+- /* Find out which of {S,L} are set. */
+- if ((ho->mppe & MPPE_OPT_128)
+- && (ho->mppe & MPPE_OPT_40)) {
+- /* Both are set, negotiate the strongest. */
++ if ((p[5] & ~MPPE_MPPC) == (MPPE_40BIT|MPPE_56BIT|MPPE_128BIT)) {
+ newret = CONFNAK;
+- if (ao->mppe & MPPE_OPT_128)
+- ho->mppe &= ~MPPE_OPT_40;
+- else if (ao->mppe & MPPE_OPT_40)
+- ho->mppe &= ~MPPE_OPT_128;
+- else {
+- newret = CONFREJ;
+- break;
++ if (ao->mppe_128) {
++ ho->mppe_128 = 1;
++ p[5] &= ~(MPPE_40BIT|MPPE_56BIT);
++ BCOPY(p, opt_buf, CILEN_MPPE);
++ BCOPY(mppe_send_key, &opt_buf[CILEN_MPPE],
++ MPPE_MAX_KEY_LEN);
++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE +
++ MPPE_MAX_KEY_LEN, 1) <= 0) {
++ ho->mppe_128 = 0;
++ p[5] |= (MPPE_40BIT|MPPE_56BIT);
++ p[5] &= ~MPPE_128BIT;
++ goto check_mppe_56_40;
++ }
++ goto check_mppe;
+ }
+- } else if (ho->mppe & MPPE_OPT_128) {
+- if (!(ao->mppe & MPPE_OPT_128)) {
+- newret = CONFREJ;
+- break;
++ p[5] &= ~MPPE_128BIT;
++ goto check_mppe_56_40;
++ }
++ if ((p[5] & ~MPPE_MPPC) == (MPPE_56BIT|MPPE_128BIT)) {
++ newret = CONFNAK;
++ if (ao->mppe_128) {
++ ho->mppe_128 = 1;
++ p[5] &= ~MPPE_56BIT;
++ BCOPY(p, opt_buf, CILEN_MPPE);
++ BCOPY(mppe_send_key, &opt_buf[CILEN_MPPE],
++ MPPE_MAX_KEY_LEN);
++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE +
++ MPPE_MAX_KEY_LEN, 1) <= 0) {
++ ho->mppe_128 = 0;
++ p[5] |= MPPE_56BIT;
++ p[5] &= ~MPPE_128BIT;
++ goto check_mppe_56;
++ }
++ goto check_mppe;
+ }
+- } else if (ho->mppe & MPPE_OPT_40) {
+- if (!(ao->mppe & MPPE_OPT_40)) {
+- newret = CONFREJ;
+- break;
++ p[5] &= ~MPPE_128BIT;
++ goto check_mppe_56;
++ }
++ if ((p[5] & ~MPPE_MPPC) == (MPPE_40BIT|MPPE_128BIT)) {
++ newret = CONFNAK;
++ if (ao->mppe_128) {
++ ho->mppe_128 = 1;
++ p[5] &= ~MPPE_40BIT;
++ BCOPY(p, opt_buf, CILEN_MPPE);
++ BCOPY(mppe_send_key, &opt_buf[CILEN_MPPE],
++ MPPE_MAX_KEY_LEN);
++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE +
++ MPPE_MAX_KEY_LEN, 1) <= 0) {
++ ho->mppe_128 = 0;
++ p[5] |= MPPE_40BIT;
++ p[5] &= ~MPPE_128BIT;
++ goto check_mppe_40;
++ }
++ goto check_mppe;
++ }
++ p[5] &= ~MPPE_128BIT;
++ goto check_mppe_40;
++ }
++ if ((p[5] & ~MPPE_MPPC) == MPPE_128BIT) {
++ if (ao->mppe_128) {
++ ho->mppe_128 = 1;
++ BCOPY(p, opt_buf, CILEN_MPPE);
++ BCOPY(mppe_send_key, &opt_buf[CILEN_MPPE],
++ MPPE_MAX_KEY_LEN);
++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE +
++ MPPE_MAX_KEY_LEN, 1) <= 0) {
++ ho->mppe_128 = 0;
++ p[5] &= ~MPPE_128BIT;
++ newret = CONFNAK;
++ }
++ goto check_mppe;
++ }
++ p[5] &= ~MPPE_128BIT;
++ newret = CONFNAK;
++ goto check_mppe;
++ }
++ check_mppe_56_40:
++ if ((p[5] & ~MPPE_MPPC) == (MPPE_40BIT|MPPE_56BIT)) {
++ newret = CONFNAK;
++ if (ao->mppe_56) {
++ ho->mppe_56 = 1;
++ p[5] &= ~MPPE_40BIT;
++ BCOPY(p, opt_buf, CILEN_MPPE);
++ BCOPY(mppe_send_key, &opt_buf[CILEN_MPPE],
++ MPPE_MAX_KEY_LEN);
++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE +
++ MPPE_MAX_KEY_LEN, 1) <= 0) {
++ ho->mppe_56 = 0;
++ p[5] |= MPPE_40BIT;
++ p[5] &= ~MPPE_56BIT;
++ newret = CONFNAK;
++ goto check_mppe_40;
++ }
++ goto check_mppe;
++ }
++ p[5] &= ~MPPE_56BIT;
++ goto check_mppe_40;
++ }
++ check_mppe_56:
++ if ((p[5] & ~MPPE_MPPC) == MPPE_56BIT) {
++ if (ao->mppe_56) {
++ ho->mppe_56 = 1;
++ BCOPY(p, opt_buf, CILEN_MPPE);
++ BCOPY(mppe_send_key, &opt_buf[CILEN_MPPE],
++ MPPE_MAX_KEY_LEN);
++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE +
++ MPPE_MAX_KEY_LEN, 1) <= 0) {
++ ho->mppe_56 = 0;
++ p[5] &= ~MPPE_56BIT;
++ newret = CONFNAK;
++ }
++ goto check_mppe;
++ }
++ p[5] &= ~MPPE_56BIT;
++ newret = CONFNAK;
++ goto check_mppe;
++ }
++ check_mppe_40:
++ if ((p[5] & ~MPPE_MPPC) == MPPE_40BIT) {
++ if (ao->mppe_40) {
++ ho->mppe_40 = 1;
++ BCOPY(p, opt_buf, CILEN_MPPE);
++ BCOPY(mppe_send_key, &opt_buf[CILEN_MPPE],
++ MPPE_MAX_KEY_LEN);
++ if (ccp_test(f->unit, opt_buf, CILEN_MPPE +
++ MPPE_MAX_KEY_LEN, 1) <= 0) {
++ ho->mppe_40 = 0;
++ p[5] &= ~MPPE_40BIT;
++ newret = CONFNAK;
++ }
++ goto check_mppe;
++ }
++ p[5] &= ~MPPE_40BIT;
++ }
++
++ check_mppe:
++ if (!ho->mppe_40 && !ho->mppe_56 && !ho->mppe_128) {
++ if (wo->mppe_40 || wo->mppe_56 || wo->mppe_128) {
++ newret = CONFNAK;
++ p[2] |= (wo->mppe_stateless ? MPPE_STATELESS : 0);
++ p[5] |= (wo->mppe_40 ? MPPE_40BIT : 0) |
++ (wo->mppe_56 ? MPPE_56BIT : 0) |
++ (wo->mppe_128 ? MPPE_128BIT : 0) |
++ (wo->mppc ? MPPE_MPPC : 0);
++ } else {
++ ho->mppe = ho->mppe_stateless = 0;
+ }
+ } else {
+- /* Neither are set. */
+- /* We cannot accept this. */
+- newret = CONFNAK;
+- /* Give the peer our idea of what can be used,
+- so it can choose and confirm */
+- ho->mppe = ao->mppe;
+- }
+-
+- /* rebuild the opts */
+- MPPE_OPTS_TO_CI(ho->mppe, &p[2]);
+- if (newret == CONFACK) {
+- u_char opt_buf[CILEN_MPPE + MPPE_MAX_KEY_LEN];
+- int mtu;
+-
+- BCOPY(p, opt_buf, CILEN_MPPE);
+- BCOPY(mppe_send_key, &opt_buf[CILEN_MPPE],
+- MPPE_MAX_KEY_LEN);
+- if (ccp_test(f->unit, opt_buf,
+- CILEN_MPPE + MPPE_MAX_KEY_LEN, 1) <= 0) {
+- /* This shouldn't happen, we've already tested it! */
+- error("MPPE required, but kernel has no support.");
+- lcp_close(f->unit, "MPPE required but not available");
+- newret = CONFREJ;
+- break;
+- }
+- /*
+- * We need to decrease the interface MTU by MPPE_PAD
+- * because MPPE frames **grow**. The kernel [must]
+- * allocate MPPE_PAD extra bytes in xmit buffers.
+- */
+- mtu = netif_get_mtu(f->unit);
+- if (mtu)
+- netif_set_mtu(f->unit, mtu - MPPE_PAD);
+- else
+- newret = CONFREJ;
++ /* MPPE is not compatible with other compression types */
++ if (wo->mppe) {
++ ao->bsd_compress = 0;
++ ao->predictor_1 = 0;
++ ao->predictor_2 = 0;
++ ao->deflate = 0;
++ ao->lzs = 0;
++ }
++ }
++ if ((!ho->mppc || !ao->mppc) && !ho->mppe) {
++ p[2] = p2;
++ p[5] = p5;
++ /* gaute: using code supposed to be here according to mppc patch */
++ newret = CONFREJ;
++
++ break;
+ }
+
++
++
+ /*
+- * We have accepted MPPE or are willing to negotiate
+- * MPPE parameters. A CONFREJ is due to subsequent
+- * (non-MPPE) processing.
++ lots of comments..
+ */
+- rej_for_ci_mppe = 0;
++
+ break;
+ #endif /* MPPE */
++
++ case CI_LZS:
++ if (!ao->lzs || clen != CILEN_LZS) {
++ newret = CONFREJ;
++ break;
++ }
++
++ ho->lzs = 1;
++ ho->lzs_hists = (p[2] << 8) | p[3];
++ ho->lzs_mode = p[4];
++ if ((ho->lzs_hists != ao->lzs_hists) ||
++ (ho->lzs_mode != ao->lzs_mode)) {
++ newret = CONFNAK;
++ if (!dont_nak) {
++ p[2] = ao->lzs_hists >> 8;
++ p[3] = ao->lzs_hists & 0xff;
++ p[4] = ao->lzs_mode;
++ } else
++ break;
++ }
++
++ if (p == p0 && ccp_test(f->unit, p, CILEN_LZS, 1) <= 0) {
++ newret = CONFREJ;
++ }
++ break;
++
+ case CI_DEFLATE:
+ case CI_DEFLATE_DRAFT:
+ if (!ao->deflate || clen != CILEN_DEFLATE
+@@ -1344,12 +1804,6 @@
+ else
+ *lenp = retp - p0;
+ }
+-#ifdef MPPE
+- if (ret == CONFREJ && ao->mppe && rej_for_ci_mppe) {
+- error("MPPE required but peer negotiation failed");
+- lcp_close(f->unit, "MPPE required but peer negotiation failed");
+- }
+-#endif
+ return ret;
+ }
+
+@@ -1371,24 +1825,35 @@
+ char *p = result;
+ char *q = result + sizeof(result); /* 1 past result */
+
+- slprintf(p, q - p, "MPPE ");
+- p += 5;
+- if (opt->mppe & MPPE_OPT_128) {
+- slprintf(p, q - p, "128-bit ");
+- p += 8;
+- }
+- if (opt->mppe & MPPE_OPT_40) {
+- slprintf(p, q - p, "40-bit ");
+- p += 7;
+- }
+- if (opt->mppe & MPPE_OPT_STATEFUL)
+- slprintf(p, q - p, "stateful");
+- else
+- slprintf(p, q - p, "stateless");
+-
++ if (opt->mppe) {
++ if (opt->mppc) {
++ slprintf(p, q - p, "MPPC/MPPE ");
++ p += 10;
++ } else {
++ slprintf(p, q - p, "MPPE ");
++ p += 5;
++ }
++ if (opt->mppe_128) {
++ slprintf(p, q - p, "128-bit ");
++ p += 8;
++ } else if (opt->mppe_56) {
++ slprintf(p, q - p, "56-bit ");
++ p += 7;
++ } else if (opt->mppe_40) {
++ slprintf(p, q - p, "40-bit ");
++ p += 7;
++ }
++ if (opt->mppe_stateless)
++ slprintf(p, q - p, "stateless");
++ else
++ slprintf(p, q - p, "stateful");
++ } else if (opt->mppc)
++ slprintf(p, q - p, "MPPC");
+ break;
+ }
+-#endif
++#endif /* MPPE */
++ case CI_LZS:
++ return "Stac LZS";
+ case CI_DEFLATE:
+ case CI_DEFLATE_DRAFT:
+ if (opt2 != NULL && opt2->deflate_size != opt->deflate_size)
+@@ -1444,12 +1909,12 @@
+ } else if (ANY_COMPRESS(*ho))
+ notice("%s transmit compression enabled", method_name(ho, NULL));
+ #ifdef MPPE
+- if (go->mppe) {
++ if (go->mppe || go->mppc) {
+ BZERO(mppe_recv_key, MPPE_MAX_KEY_LEN);
+ BZERO(mppe_send_key, MPPE_MAX_KEY_LEN);
+ continue_networks(f->unit); /* Bring up IP et al */
+ }
+-#endif
++#endif /* MPPE */
+ }
+
+ /*
+@@ -1472,7 +1937,7 @@
+ lcp_close(f->unit, "MPPE disabled");
+ }
+ }
+-#endif
++#endif /* MPPE */
+ }
+
+ /*
+@@ -1532,24 +1997,28 @@
+ #ifdef MPPE
+ case CI_MPPE:
+ if (optlen >= CILEN_MPPE) {
+- u_char mppe_opts;
+-
+- MPPE_CI_TO_OPTS(&p[2], mppe_opts);
+- printer(arg, "mppe %s %s %s %s %s %s%s",
+- (p[2] & MPPE_H_BIT)? "+H": "-H",
+- (p[5] & MPPE_M_BIT)? "+M": "-M",
+- (p[5] & MPPE_S_BIT)? "+S": "-S",
+- (p[5] & MPPE_L_BIT)? "+L": "-L",
++ printer(arg, "mppe %s %s %s %s %s %s",
++ (p[2] & MPPE_STATELESS)? "+H": "-H",
++ (p[5] & MPPE_56BIT)? "+M": "-M",
++ (p[5] & MPPE_128BIT)? "+S": "-S",
++ (p[5] & MPPE_40BIT)? "+L": "-L",
+ (p[5] & MPPE_D_BIT)? "+D": "-D",
+- (p[5] & MPPE_C_BIT)? "+C": "-C",
+- (mppe_opts & MPPE_OPT_UNKNOWN)? " +U": "");
+- if (mppe_opts & MPPE_OPT_UNKNOWN)
++ (p[5] & MPPE_MPPC)? "+C": "-C");
++ if ((p[5] & ~(MPPE_56BIT | MPPE_128BIT | MPPE_40BIT |
++ MPPE_D_BIT | MPPE_MPPC)) ||
++ (p[2] & ~MPPE_STATELESS))
+ printer(arg, " (%.2x %.2x %.2x %.2x)",
+ p[2], p[3], p[4], p[5]);
+ p += CILEN_MPPE;
+ }
+ break;
+-#endif
++#endif /* MPPE */
++ case CI_LZS:
++ if (optlen >= CILEN_LZS) {
++ printer(arg, "lzs %.2x %.2x %.2x", p[2], p[3], p[4]);
++ p += CILEN_LZS;
++ }
++ break;
+ case CI_DEFLATE:
+ case CI_DEFLATE_DRAFT:
+ if (optlen >= CILEN_DEFLATE) {
+@@ -1635,6 +2104,7 @@
+ error("Lost compression sync: disabling compression");
+ ccp_close(unit, "Lost compression sync");
+ #ifdef MPPE
++ /* My module dosn't need this. J.D., 2003-07-06 */
+ /*
+ * If we were doing MPPE, we must also take the link down.
+ */
+@@ -1642,9 +2112,18 @@
+ error("Too many MPPE errors, closing LCP");
+ lcp_close(unit, "Too many MPPE errors");
+ }
+-#endif
++#endif /* MPPE */
+ } else {
+ /*
++ * When LZS or MPPE/MPPC is negotiated we just send CCP_RESETREQ
++ * and don't wait for CCP_RESETACK
++ */
++ if ((ccp_gotoptions[f->unit].method == CI_LZS) ||
++ (ccp_gotoptions[f->unit].method == CI_MPPE)) {
++ fsm_sdata(f, CCP_RESETREQ, f->reqid = ++f->id, NULL, 0);
++ return;
++ }
++ /*
+ * Send a reset-request to reset the peer's compressor.
+ * We don't do that if we are still waiting for an
+ * acknowledgement to a previous reset-request.
+@@ -1675,4 +2154,3 @@
+ } else
+ ccp_localstate[f->unit] &= ~RACK_PENDING;
+ }
+-
+diff -urN ppp-2.4.4-old/pppd/ccp.h ppp-2.4.4-new/pppd/ccp.h
+--- ppp-2.4.4-old/pppd/ccp.h 2004-11-04 11:02:26.000000000 +0100
++++ ppp-2.4.4-new/pppd/ccp.h 2008-03-19 20:11:28.000000000 +0100
+@@ -37,9 +37,17 @@
+ bool predictor_2; /* do Predictor-2? */
+ bool deflate_correct; /* use correct code for deflate? */
+ bool deflate_draft; /* use draft RFC code for deflate? */
++ bool lzs; /* do Stac LZS? */
++ bool mppc; /* do MPPC? */
+ bool mppe; /* do MPPE? */
++ bool mppe_40; /* allow 40 bit encryption? */
++ bool mppe_56; /* allow 56 bit encryption? */
++ bool mppe_128; /* allow 128 bit encryption? */
++ bool mppe_stateless; /* allow stateless encryption */
+ u_short bsd_bits; /* # bits/code for BSD Compress */
+ u_short deflate_size; /* lg(window size) for Deflate */
++ u_short lzs_mode; /* LZS check mode */
++ u_short lzs_hists; /* number of LZS histories */
+ short method; /* code for chosen compression method */
+ } ccp_options;
+
+diff -urN ppp-2.4.4-old/pppd/chap_ms.c ppp-2.4.4-new/pppd/chap_ms.c
+--- ppp-2.4.4-old/pppd/chap_ms.c 2006-05-21 13:56:40.000000000 +0200
++++ ppp-2.4.4-new/pppd/chap_ms.c 2008-03-19 20:11:28.000000000 +0100
+@@ -897,13 +897,17 @@
+ /*
+ * Disable undesirable encryption types. Note that we don't ENABLE
+ * any encryption types, to avoid overriding manual configuration.
++ *
++ * It seems that 56 bit keys are unsupported in MS-RADIUS (see RFC 2548)
+ */
+ switch(types) {
+ case MPPE_ENC_TYPES_RC4_40:
+- ccp_wantoptions[0].mppe &= ~MPPE_OPT_128; /* disable 128-bit */
++ ccp_wantoptions[0].mppe_128 = 0; /* disable 128-bit */
++ ccp_wantoptions[0].mppe_56 = 0; /* disable 56-bit */
+ break;
+ case MPPE_ENC_TYPES_RC4_128:
+- ccp_wantoptions[0].mppe &= ~MPPE_OPT_40; /* disable 40-bit */
++ ccp_wantoptions[0].mppe_56 = 0; /* disable 56-bit */
++ ccp_wantoptions[0].mppe_40 = 0; /* disable 40-bit */
+ break;
+ default:
+ break;
+diff -urN ppp-2.4.4-old/pppd/pppd.8 ppp-2.4.4-new/pppd/pppd.8
+--- ppp-2.4.4-old/pppd/pppd.8 2006-06-16 02:01:23.000000000 +0200
++++ ppp-2.4.4-new/pppd/pppd.8 2008-03-19 20:11:28.000000000 +0100
+@@ -627,9 +627,29 @@
+ Enables the use of PPP multilink; this is an alias for the `multilink'
+ option. This option is currently only available under Linux.
+ .TP
+-.B mppe\-stateful
+-Allow MPPE to use stateful mode. Stateless mode is still attempted first.
+-The default is to disallow stateful mode.
++.B mppc
++Enables MPPC (Microsoft Point to Point Compression). This is the default.
++.TP
++.B mppe \fIsubopt1[,subopt2[,subopt3[..]]]
++Modify MPPE (Microsoft Point to Point Encryption) parameters. In order
++for MPPE to successfully come up, you must have authenticated with either
++MS-CHAP or MS-CHAPv2. By default MPPE is optional, it means that pppd will
++not propose MPPE to the peer, but will negotiate MPPE if peer wants that.
++You can change this using \fIrequired\fR suboption.
++This option is presently only supported under Linux, and only if your
++kernel has been configured to include MPPE support.
++.IP
++MPPE suboptions:
++.br
++\fIrequired\fR - require MPPE; disconnect if peer doesn't support it,
++.br
++\fIstateless\fR - try to negotiate stateless mode; default is stateful,
++.br
++\fIno40\fR - disable 40 bit keys,
++.br
++\fIno56\fR - disable 56 bit keys,
++.br
++\fIno128\fR - disable 128 bit keys
+ .TP
+ .B mpshortseq
+ Enables the use of short (12-bit) sequence numbers in multilink
+@@ -767,17 +787,11 @@
+ Disables the use of PPP multilink. This option is currently only
+ available under Linux.
+ .TP
+-.B nomppe
+-Disables MPPE (Microsoft Point to Point Encryption). This is the default.
+-.TP
+-.B nomppe\-40
+-Disable 40-bit encryption with MPPE.
++.B nomppc
++Disables MPPC (Microsoft Point to Point Compression).
+ .TP
+-.B nomppe\-128
+-Disable 128-bit encryption with MPPE.
+-.TP
+-.B nomppe\-stateful
+-Disable MPPE stateful mode. This is the default.
++.B nomppe
++Disables MPPE (Microsoft Point to Point Encryption).
+ .TP
+ .B nompshortseq
+ Disables the use of short (12-bit) sequence numbers in the PPP
+@@ -958,19 +972,6 @@
+ Require the peer to authenticate itself using CHAP [Challenge
+ Handshake Authentication Protocol] authentication.
+ .TP
+-.B require\-mppe
+-Require the use of MPPE (Microsoft Point to Point Encryption). This
+-option disables all other compression types. This option enables
+-both 40-bit and 128-bit encryption. In order for MPPE to successfully
+-come up, you must have authenticated with either MS\-CHAP or MS\-CHAPv2.
+-This option is presently only supported under Linux, and only if your
+-kernel has been configured to include MPPE support.
+-.TP
+-.B require\-mppe\-40
+-Require the use of MPPE, with 40-bit encryption.
+-.TP
+-.B require\-mppe\-128
+-Require the use of MPPE, with 128-bit encryption.
+ .TP
+ .B require\-mschap
+ Require the peer to authenticate itself using MS\-CHAP [Microsoft Challenge
git.openpandora.org / openembedded.git / commitdiff