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openwrt-xburst/package/ppp/patches/110-debian_defaultroute.patch
hauke 641c4de73d [ppp] refresh patches 
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15958 3c298f89-4303-0410-b956-a3cf2f4a3e73
2009-05-21 10:49:21 +00:00

302 lines
11 KiB
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--- 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;
}
--- 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? */
--- a/pppd/pppd.8
+++ b/pppd/pppd.8
@@ -121,6 +121,11 @@ the gateway, when IPCP negotiation is su
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 cont
.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
--- a/pppd/pppd.h
+++ b/pppd/pppd.h
@@ -644,7 +644,7 @@ 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 */
--- a/pppd/sys-linux.c
+++ b/pppd/sys-linux.c
@@ -206,6 +206,8 @@ static unsigned char inbuf[512]; /* buff
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 */
@@ -1520,6 +1522,9 @@ static int read_route_table(struct rtent
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);
@@ -1589,20 +1594,51 @@ 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));
@@ -1617,10 +1653,16 @@ int sifdefaultroute (int unit, u_int32_t
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;
@@ -1649,11 +1691,21 @@ int cifdefaultroute (int unit, u_int32_t
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;
}
--- 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
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