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Diffstat (limited to 'target/linux/generic-2.6/patches-2.6.22/201-multiple_default_gateways.patch')
-rw-r--r--target/linux/generic-2.6/patches-2.6.22/201-multiple_default_gateways.patch339
1 files changed, 339 insertions, 0 deletions
diff --git a/target/linux/generic-2.6/patches-2.6.22/201-multiple_default_gateways.patch b/target/linux/generic-2.6/patches-2.6.22/201-multiple_default_gateways.patch
new file mode 100644
index 0000000000..313b1102f8
--- /dev/null
+++ b/target/linux/generic-2.6/patches-2.6.22/201-multiple_default_gateways.patch
@@ -0,0 +1,339 @@
+diff -urN linux-2.6.21.1.old/include/linux/rtnetlink.h linux-2.6.21.1.dev/include/linux/rtnetlink.h
+--- linux-2.6.21.1.old/include/linux/rtnetlink.h 2007-04-27 23:49:26.000000000 +0200
++++ linux-2.6.21.1.dev/include/linux/rtnetlink.h 2007-05-26 20:46:11.883321560 +0200
+@@ -293,6 +293,8 @@
+ #define RTNH_F_DEAD 1 /* Nexthop is dead (used by multipath) */
+ #define RTNH_F_PERVASIVE 2 /* Do recursive gateway lookup */
+ #define RTNH_F_ONLINK 4 /* Gateway is forced on link */
++#define RTNH_F_SUSPECT 8 /* We don't know the real state */
++#define RTNH_F_BADSTATE (RTNH_F_DEAD | RTNH_F_SUSPECT)
+
+ /* Macros to handle hexthops */
+
+diff -urN linux-2.6.21.1.old/include/net/flow.h linux-2.6.21.1.dev/include/net/flow.h
+--- linux-2.6.21.1.old/include/net/flow.h 2007-04-27 23:49:26.000000000 +0200
++++ linux-2.6.21.1.dev/include/net/flow.h 2007-05-26 20:46:11.922315632 +0200
+@@ -19,6 +19,8 @@
+ struct {
+ __be32 daddr;
+ __be32 saddr;
++ __u32 lsrc;
++ __u32 gw;
+ __u8 tos;
+ __u8 scope;
+ } ip4_u;
+@@ -43,6 +45,8 @@
+ #define fl6_flowlabel nl_u.ip6_u.flowlabel
+ #define fl4_dst nl_u.ip4_u.daddr
+ #define fl4_src nl_u.ip4_u.saddr
++#define fl4_lsrc nl_u.ip4_u.lsrc
++#define fl4_gw nl_u.ip4_u.gw
+ #define fl4_tos nl_u.ip4_u.tos
+ #define fl4_scope nl_u.ip4_u.scope
+
+diff -urN linux-2.6.21.1.old/net/ipv4/route.c linux-2.6.21.1.dev/net/ipv4/route.c
+--- linux-2.6.21.1.old/net/ipv4/route.c 2007-04-27 23:49:26.000000000 +0200
++++ linux-2.6.21.1.dev/net/ipv4/route.c 2007-05-26 20:46:11.967308792 +0200
+@@ -1208,6 +1208,7 @@
+
+ /* Gateway is different ... */
+ rt->rt_gateway = new_gw;
++ if (rt->fl.fl4_gw) rt->fl.fl4_gw = new_gw;
+
+ /* Redirect received -> path was valid */
+ dst_confirm(&rth->u.dst);
+@@ -1643,6 +1644,7 @@
+ rth->fl.fl4_tos = tos;
+ rth->fl.mark = skb->mark;
+ rth->fl.fl4_src = saddr;
++ rth->fl.fl4_lsrc = 0;
+ rth->rt_src = saddr;
+ #ifdef CONFIG_NET_CLS_ROUTE
+ rth->u.dst.tclassid = itag;
+@@ -1653,6 +1655,7 @@
+ dev_hold(rth->u.dst.dev);
+ rth->idev = in_dev_get(rth->u.dst.dev);
+ rth->fl.oif = 0;
++ rth->fl.fl4_gw = 0;
+ rth->rt_gateway = daddr;
+ rth->rt_spec_dst= spec_dst;
+ rth->rt_type = RTN_MULTICAST;
+@@ -1716,7 +1719,7 @@
+ static inline int __mkroute_input(struct sk_buff *skb,
+ struct fib_result* res,
+ struct in_device *in_dev,
+- __be32 daddr, __be32 saddr, u32 tos,
++ __be32 daddr, __be32 saddr, u32 tos, u32 lsrc,
+ struct rtable **result)
+ {
+
+@@ -1751,6 +1754,7 @@
+ flags |= RTCF_DIRECTSRC;
+
+ if (out_dev == in_dev && err && !(flags & (RTCF_NAT | RTCF_MASQ)) &&
++ !lsrc &&
+ (IN_DEV_SHARED_MEDIA(out_dev) ||
+ inet_addr_onlink(out_dev, saddr, FIB_RES_GW(*res))))
+ flags |= RTCF_DOREDIRECT;
+@@ -1788,6 +1792,7 @@
+ rth->fl.mark = skb->mark;
+ rth->fl.fl4_src = saddr;
+ rth->rt_src = saddr;
++ rth->fl.fl4_lsrc = lsrc;
+ rth->rt_gateway = daddr;
+ rth->rt_iif =
+ rth->fl.iif = in_dev->dev->ifindex;
+@@ -1795,6 +1800,7 @@
+ dev_hold(rth->u.dst.dev);
+ rth->idev = in_dev_get(rth->u.dst.dev);
+ rth->fl.oif = 0;
++ rth->fl.fl4_gw = 0;
+ rth->rt_spec_dst= spec_dst;
+
+ rth->u.dst.input = ip_forward;
+@@ -1816,19 +1822,21 @@
+ struct fib_result* res,
+ const struct flowi *fl,
+ struct in_device *in_dev,
+- __be32 daddr, __be32 saddr, u32 tos)
++ __be32 daddr, __be32 saddr, u32 tos,
++ u32 lsrc)
+ {
+ struct rtable* rth = NULL;
+ int err;
+ unsigned hash;
+
++ fib_select_default(fl, res);
+ #ifdef CONFIG_IP_ROUTE_MULTIPATH
+- if (res->fi && res->fi->fib_nhs > 1 && fl->oif == 0)
++ if (res->fi && res->fi->fib_nhs > 1)
+ fib_select_multipath(fl, res);
+ #endif
+
+ /* create a routing cache entry */
+- err = __mkroute_input(skb, res, in_dev, daddr, saddr, tos, &rth);
++ err = __mkroute_input(skb, res, in_dev, daddr, saddr, tos, lsrc, &rth);
+ if (err)
+ return err;
+
+@@ -1841,7 +1849,8 @@
+ struct fib_result* res,
+ const struct flowi *fl,
+ struct in_device *in_dev,
+- __be32 daddr, __be32 saddr, u32 tos)
++ __be32 daddr, __be32 saddr, u32 tos,
++ u32 lsrc)
+ {
+ #ifdef CONFIG_IP_ROUTE_MULTIPATH_CACHED
+ struct rtable* rth = NULL, *rtres;
+@@ -1857,7 +1866,7 @@
+ /* distinguish between multipath and singlepath */
+ if (hopcount < 2)
+ return ip_mkroute_input_def(skb, res, fl, in_dev, daddr,
+- saddr, tos);
++ saddr, tos, 0);
+
+ /* add all alternatives to the routing cache */
+ for (hop = 0; hop < hopcount; hop++) {
+@@ -1869,7 +1878,7 @@
+
+ /* create a routing cache entry */
+ err = __mkroute_input(skb, res, in_dev, daddr, saddr, tos,
+- &rth);
++ 0, &rth);
+ if (err)
+ return err;
+
+@@ -1889,7 +1898,7 @@
+ skb->dst = &rtres->u.dst;
+ return err;
+ #else /* CONFIG_IP_ROUTE_MULTIPATH_CACHED */
+- return ip_mkroute_input_def(skb, res, fl, in_dev, daddr, saddr, tos);
++ return ip_mkroute_input_def(skb, res, fl, in_dev, daddr, saddr, tos, lsrc);
+ #endif /* CONFIG_IP_ROUTE_MULTIPATH_CACHED */
+ }
+
+@@ -1905,18 +1914,18 @@
+ */
+
+ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
+- u8 tos, struct net_device *dev)
++ u8 tos, struct net_device *dev, u32 lsrc)
+ {
+ struct fib_result res;
+ struct in_device *in_dev = in_dev_get(dev);
+ struct flowi fl = { .nl_u = { .ip4_u =
+ { .daddr = daddr,
+- .saddr = saddr,
++ .saddr = lsrc ? : saddr,
+ .tos = tos,
+ .scope = RT_SCOPE_UNIVERSE,
+ } },
+ .mark = skb->mark,
+- .iif = dev->ifindex };
++ .iif = lsrc? loopback_dev.ifindex : dev->ifindex };
+ unsigned flags = 0;
+ u32 itag = 0;
+ struct rtable * rth;
+@@ -1949,6 +1958,12 @@
+ if (BADCLASS(daddr) || ZERONET(daddr) || LOOPBACK(daddr))
+ goto martian_destination;
+
++ if (lsrc) {
++ if (MULTICAST(lsrc) || BADCLASS(lsrc) ||
++ ZERONET(lsrc) || LOOPBACK(lsrc))
++ goto e_inval;
++ }
++
+ /*
+ * Now we are ready to route packet.
+ */
+@@ -1958,6 +1973,10 @@
+ goto no_route;
+ }
+ free_res = 1;
++ if (lsrc && res.type != RTN_UNICAST && res.type != RTN_NAT)
++ goto e_inval;
++ fl.iif = dev->ifindex;
++ fl.fl4_src = saddr;
+
+ RT_CACHE_STAT_INC(in_slow_tot);
+
+@@ -1982,7 +2001,7 @@
+ if (res.type != RTN_UNICAST)
+ goto martian_destination;
+
+- err = ip_mkroute_input(skb, &res, &fl, in_dev, daddr, saddr, tos);
++ err = ip_mkroute_input(skb, &res, &fl, in_dev, daddr, saddr, tos, lsrc);
+ if (err == -ENOBUFS)
+ goto e_nobufs;
+ if (err == -EINVAL)
+@@ -1997,6 +2016,8 @@
+ brd_input:
+ if (skb->protocol != htons(ETH_P_IP))
+ goto e_inval;
++ if (lsrc)
++ goto e_inval;
+
+ if (ZERONET(saddr))
+ spec_dst = inet_select_addr(dev, 0, RT_SCOPE_LINK);
+@@ -2037,6 +2058,7 @@
+ rth->u.dst.dev = &loopback_dev;
+ dev_hold(rth->u.dst.dev);
+ rth->idev = in_dev_get(rth->u.dst.dev);
++ rth->fl.fl4_gw = 0;
+ rth->rt_gateway = daddr;
+ rth->rt_spec_dst= spec_dst;
+ rth->u.dst.input= ip_local_deliver;
+@@ -2086,8 +2108,9 @@
+ goto e_inval;
+ }
+
+-int ip_route_input(struct sk_buff *skb, __be32 daddr, __be32 saddr,
+- u8 tos, struct net_device *dev)
++static inline int
++ip_route_input_cached(struct sk_buff *skb, __be32 daddr, __be32 saddr,
++ u8 tos, struct net_device *dev, u32 lsrc)
+ {
+ struct rtable * rth;
+ unsigned hash;
+@@ -2102,6 +2125,7 @@
+ if (rth->fl.fl4_dst == daddr &&
+ rth->fl.fl4_src == saddr &&
+ rth->fl.iif == iif &&
++ rth->fl.fl4_lsrc == lsrc &&
+ rth->fl.oif == 0 &&
+ rth->fl.mark == skb->mark &&
+ rth->fl.fl4_tos == tos) {
+@@ -2148,7 +2172,19 @@
+ rcu_read_unlock();
+ return -EINVAL;
+ }
+- return ip_route_input_slow(skb, daddr, saddr, tos, dev);
++ return ip_route_input_slow(skb, daddr, saddr, tos, dev, lsrc);
++}
++
++int ip_route_input(struct sk_buff *skb, u32 daddr, u32 saddr,
++ u8 tos, struct net_device *dev)
++{
++ return ip_route_input_cached(skb, daddr, saddr, tos, dev, 0);
++}
++
++int ip_route_input_lookup(struct sk_buff *skb, u32 daddr, u32 saddr,
++ u8 tos, struct net_device *dev, u32 lsrc)
++{
++ return ip_route_input_cached(skb, daddr, saddr, tos, dev, lsrc);
+ }
+
+ static inline int __mkroute_output(struct rtable **result,
+@@ -2227,6 +2263,7 @@
+ rth->fl.fl4_tos = tos;
+ rth->fl.fl4_src = oldflp->fl4_src;
+ rth->fl.oif = oldflp->oif;
++ rth->fl.fl4_gw = oldflp->fl4_gw;
+ rth->fl.mark = oldflp->mark;
+ rth->rt_dst = fl->fl4_dst;
+ rth->rt_src = fl->fl4_src;
+@@ -2367,6 +2404,7 @@
+ struct flowi fl = { .nl_u = { .ip4_u =
+ { .daddr = oldflp->fl4_dst,
+ .saddr = oldflp->fl4_src,
++ .gw = oldflp->fl4_gw,
+ .tos = tos & IPTOS_RT_MASK,
+ .scope = ((tos & RTO_ONLINK) ?
+ RT_SCOPE_LINK :
+@@ -2470,6 +2508,7 @@
+ dev_out = &loopback_dev;
+ dev_hold(dev_out);
+ fl.oif = loopback_dev.ifindex;
++ fl.fl4_gw = 0;
+ res.type = RTN_LOCAL;
+ flags |= RTCF_LOCAL;
+ goto make_route;
+@@ -2477,7 +2516,7 @@
+
+ if (fib_lookup(&fl, &res)) {
+ res.fi = NULL;
+- if (oldflp->oif) {
++ if (oldflp->oif && dev_out->flags & IFF_UP) {
+ /* Apparently, routing tables are wrong. Assume,
+ that the destination is on link.
+
+@@ -2517,6 +2556,7 @@
+ dev_out = &loopback_dev;
+ dev_hold(dev_out);
+ fl.oif = dev_out->ifindex;
++ fl.fl4_gw = 0;
+ if (res.fi)
+ fib_info_put(res.fi);
+ res.fi = NULL;
+@@ -2524,13 +2564,12 @@
+ goto make_route;
+ }
+
++ if (res.type == RTN_UNICAST)
++ fib_select_default(&fl, &res);
+ #ifdef CONFIG_IP_ROUTE_MULTIPATH
+- if (res.fi->fib_nhs > 1 && fl.oif == 0)
++ if (res.fi->fib_nhs > 1)
+ fib_select_multipath(&fl, &res);
+- else
+ #endif
+- if (!res.prefixlen && res.type == RTN_UNICAST && !fl.oif)
+- fib_select_default(&fl, &res);
+
+ if (!fl.fl4_src)
+ fl.fl4_src = FIB_RES_PREFSRC(res);
+@@ -2567,6 +2606,7 @@
+ rth->fl.fl4_src == flp->fl4_src &&
+ rth->fl.iif == 0 &&
+ rth->fl.oif == flp->oif &&
++ rth->fl.fl4_gw == flp->fl4_gw &&
+ rth->fl.mark == flp->mark &&
+ !((rth->fl.fl4_tos ^ flp->fl4_tos) &
+ (IPTOS_RT_MASK | RTO_ONLINK))) {
+@@ -3271,3 +3311,4 @@
+ EXPORT_SYMBOL(__ip_select_ident);
+ EXPORT_SYMBOL(ip_route_input);
+ EXPORT_SYMBOL(ip_route_output_key);
++EXPORT_SYMBOL(ip_route_input_lookup);
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-13 08:15:18 +0000