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-rw-r--r--package/ppp/patches/108-debian_defaultroute.patch253
1 files changed, 253 insertions, 0 deletions
diff --git a/package/ppp/patches/108-debian_defaultroute.patch b/package/ppp/patches/108-debian_defaultroute.patch
new file mode 100644
index 0000000000..76b444e4b2
--- /dev/null
+++ b/package/ppp/patches/108-debian_defaultroute.patch
@@ -0,0 +1,253 @@
+--- ppp/pppd/ipcp.c Wed May 31 17:20:41 2000
++++ ppp/pppd/ipcp.c Wed May 31 17:27:19 2000
+@@ -145,7 +145,17 @@
+ { "-defaultroute", o_bool, &ipcp_allowoptions[0].default_route,
+ "disable defaultroute option", OPT_A2COPY,
+ &ipcp_wantoptions[0].default_route },
+
++#ifdef __linux__
++ { "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 },
++#endif
+ { "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,
+@@ -195,7 +205,7 @@
+ 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 *)); /* Run an up/down script */
+ static void ipcp_script_done __P((void *));
+
+@@ -1344,7 +1354,12 @@
+ if (!sifnpmode(u, PPP_IP, NPMODE_QUEUE))
+ return 0;
+ if (wo->default_route)
++#ifndef __linux__
+ if (sifdefaultroute(u, wo->ouraddr, wo->hisaddr))
++#else
++ if (sifdefaultroute(u, wo->ouraddr, wo->hisaddr,
++ wo->replace_default_route))
++#endif
+ default_route_set[u] = 1;
+ if (wo->proxy_arp)
+ if (sifproxyarp(u, wo->hisaddr))
+@@ -1420,7 +1435,8 @@
+ */
+ 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));
+@@ -1445,7 +1461,12 @@
+
+ /* assign a default route through the interface if required */
+ if (ipcp_wantoptions[f->unit].default_route)
++#ifndef __linux__
+ if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr))
++#else
++ if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr,
++ wo->replace_default_route))
++#endif
+ default_route_set[f->unit] = 1;
+
+ /* Make a proxy ARP entry if requested. */
+@@ -1492,7 +1513,12 @@
+
+ /* assign a default route through the interface if required */
+ if (ipcp_wantoptions[f->unit].default_route)
++#ifndef __linux__
+ if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr))
++#else
++ if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr,
++ wo->replace_default_route))
++#endif
+ default_route_set[f->unit] = 1;
+
+ /* Make a proxy ARP entry if requested. */
+@@ -1559,7 +1585,7 @@
+ 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 */
+@@ -1575,16 +1601,25 @@
+ * 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;
+ }
+--- ppp/pppd/ipcp.h Wed May 31 17:20:41 2000
++++ ppp/pppd/ipcp.h Wed May 31 15:56:17 2000
+@@ -47,6 +47,7 @@
+ 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? */
+--- ppp/pppd/pppd.h Wed May 31 17:20:41 2000
++++ ppp/pppd/pppd.h Wed May 31 15:56:17 2000
+@@ -416,7 +416,11 @@
+ int cif6addr __P((int, eui64_t, eui64_t));
+ /* Remove an IPv6 address from i/f */
+ #endif
++#ifndef __linux__
+ int sifdefaultroute __P((int, u_int32_t, u_int32_t));
++#else
++int sifdefaultroute __P((int, u_int32_t, u_int32_t, bool replace_default_rt));
++#endif
+ /* Create default route through i/f */
+ int cifdefaultroute __P((int, u_int32_t, u_int32_t));
+ /* Delete default route through i/f */
+--- ppp/pppd/sys-linux.c Wed May 31 17:20:41 2000
++++ ppp/pppd/sys-linux.c Wed May 31 17:37:23 2000
+@@ -143,6 +143,8 @@
+
+ static int if_is_up; /* Interface has been marked up */
+ static u_int32_t default_route_gateway; /* 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 */
+@@ -1209,6 +1211,9 @@
+ 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);
+@@ -1278,19 +1283,53 @@
+ /********************************************************************
+ *
+ * sifdefaultroute - assign a default route through the address given.
++ *
++ * 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)
++int sifdefaultroute (int unit, u_int32_t ouraddr, u_int32_t gateway, bool replace)
+ {
+- struct rtentry rt;
+-
+- if (defaultroute_exists(&rt) && strcmp(rt.rt_dev, ifname) != 0) {
+- u_int32_t old_gateway = SIN_ADDR(rt.rt_gateway);
++ struct rtentry rt, tmp_rt;
++ struct rtentry *del_rt = NULL;
+
+- if (old_gateway != gateway)
+- error("not replacing existing default route to %s [%I]",
+- rt.rt_dev, old_gateway);
+- return 0;
++
++ 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:
++ */
++ u_int32_t old_gateway = SIN_ADDR(old_def_rt.rt_gateway);
++
++ if (old_gateway != gateway) {
++ if (!replace) {
++ error("not replacing default route to %s [%I]",
++ old_def_rt.rt_dev, old_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, old_gateway);
++ default_rt_repl_rest = 1;
++ del_rt = &old_def_rt;
++ }
++ }
+ }
+
+ memset (&rt, '\0', sizeof (rt));
+@@ -1310,6 +1349,12 @@
+ error("default route ioctl(SIOCADDRT): %m(%d)", errno);
+ 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(%d)", errno);
++ return 0;
++ }
+
+ default_route_gateway = gateway;
+ return 1;
+@@ -1344,6 +1389,16 @@
+ error("default route ioctl(SIOCDELRT): %m (%d)", errno);
+ 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(%d)", errno);
++ return 0;
++ }
++ default_rt_repl_rest = 0;
+ }
+
+ return 1;