diff options
Diffstat (limited to 'openwrt/target/linux/generic-2.4/patches/700-multiple_default_gateways.patch')
| -rw-r--r-- | openwrt/target/linux/generic-2.4/patches/700-multiple_default_gateways.patch | 1299 |
1 files changed, 1299 insertions, 0 deletions
diff --git a/openwrt/target/linux/generic-2.4/patches/700-multiple_default_gateways.patch b/openwrt/target/linux/generic-2.4/patches/700-multiple_default_gateways.patch new file mode 100644 index 0000000000..46407c85f2 --- /dev/null +++ b/openwrt/target/linux/generic-2.4/patches/700-multiple_default_gateways.patch @@ -0,0 +1,1299 @@ +diff -ur v2.4.29/linux/include/linux/netfilter_ipv4/ip_nat.h linux/include/linux/netfilter_ipv4/ip_nat.h +--- v2.4.29/linux/include/linux/netfilter_ipv4/ip_nat.h 2005-01-20 09:25:34.000000000 +0200 ++++ linux/include/linux/netfilter_ipv4/ip_nat.h 2005-01-20 09:55:46.998651976 +0200 +@@ -121,5 +121,13 @@ + extern u_int16_t ip_nat_cheat_check(u_int32_t oldvalinv, + u_int32_t newval, + u_int16_t oldcheck); ++ ++/* Call input routing for SNAT-ed traffic */ ++extern unsigned int ip_nat_route_input(unsigned int hooknum, ++ struct sk_buff **pskb, ++ const struct net_device *in, ++ const struct net_device *out, ++ int (*okfn)(struct sk_buff *)); ++ + #endif /*__KERNEL__*/ + #endif +diff -ur v2.4.29/linux/include/linux/rtnetlink.h linux/include/linux/rtnetlink.h +--- v2.4.29/linux/include/linux/rtnetlink.h 2004-08-08 10:56:48.000000000 +0300 ++++ linux/include/linux/rtnetlink.h 2005-01-20 09:55:33.431714464 +0200 +@@ -234,6 +234,8 @@ + #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 -ur v2.4.29/linux/include/net/ip_fib.h linux/include/net/ip_fib.h +--- v2.4.29/linux/include/net/ip_fib.h 2001-11-13 03:24:05.000000000 +0200 ++++ linux/include/net/ip_fib.h 2005-01-20 09:55:33.432714312 +0200 +@@ -162,7 +162,8 @@ + + static inline void fib_select_default(const struct rt_key *key, struct fib_result *res) + { +- if (FIB_RES_GW(*res) && FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK) ++ if ((FIB_RES_GW(*res) && FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK) || ++ FIB_RES_NH(*res).nh_scope == RT_SCOPE_HOST) + main_table->tb_select_default(main_table, key, res); + } + +@@ -174,6 +175,7 @@ + extern int fib_lookup(const struct rt_key *key, struct fib_result *res); + extern struct fib_table *__fib_new_table(int id); + extern void fib_rule_put(struct fib_rule *r); ++extern int fib_result_table(struct fib_result *res); + + static inline struct fib_table *fib_get_table(int id) + { +@@ -275,5 +277,6 @@ + #endif + } + ++extern rwlock_t fib_nhflags_lock; + + #endif /* _NET_FIB_H */ +diff -ur v2.4.29/linux/include/net/route.h linux/include/net/route.h +--- v2.4.29/linux/include/net/route.h 2003-08-25 22:06:13.000000000 +0300 ++++ linux/include/net/route.h 2005-01-20 09:55:46.999651824 +0200 +@@ -49,6 +49,8 @@ + { + __u32 dst; + __u32 src; ++ __u32 lsrc; ++ __u32 gw; + int iif; + int oif; + #ifdef CONFIG_IP_ROUTE_FWMARK +@@ -128,6 +130,7 @@ + extern void rt_cache_flush(int how); + extern int ip_route_output_key(struct rtable **, const struct rt_key *key); + extern int ip_route_input(struct sk_buff*, u32 dst, u32 src, u8 tos, struct net_device *devin); ++extern int ip_route_input_lookup(struct sk_buff*, u32 dst, u32 src, u8 tos, struct net_device *devin, u32 lsrc); + extern unsigned short ip_rt_frag_needed(struct iphdr *iph, unsigned short new_mtu); + extern void ip_rt_update_pmtu(struct dst_entry *dst, unsigned mtu); + extern void ip_rt_send_redirect(struct sk_buff *skb); +@@ -148,6 +151,15 @@ + } + + ++static inline int ++ip_route_output_lookup(struct rtable **rp, ++ u32 daddr, u32 saddr, u32 tos, int oif, u32 gw) ++{ ++ struct rt_key key = { dst:daddr, src:saddr, gw:gw, oif:oif, tos:tos }; ++ ++ return ip_route_output_key(rp, &key); ++} ++ + static inline void ip_rt_put(struct rtable * rt) + { + if (rt) +diff -ur v2.4.29/linux/net/ipv4/fib_frontend.c linux/net/ipv4/fib_frontend.c +--- v2.4.29/linux/net/ipv4/fib_frontend.c 2003-08-25 22:06:13.000000000 +0300 ++++ linux/net/ipv4/fib_frontend.c 2005-01-20 09:55:46.999651824 +0200 +@@ -54,6 +54,8 @@ + struct fib_table *local_table; + struct fib_table *main_table; + ++#define FIB_RES_TABLE(r) (RT_TABLE_MAIN) ++ + #else + + #define RT_TABLE_MIN 1 +@@ -71,6 +73,7 @@ + return tb; + } + ++#define FIB_RES_TABLE(r) (fib_result_table(r)) + + #endif /* CONFIG_IP_MULTIPLE_TABLES */ + +@@ -209,6 +212,9 @@ + struct in_device *in_dev; + struct rt_key key; + struct fib_result res; ++ int table; ++ unsigned char prefixlen; ++ unsigned char scope; + int no_addr, rpf; + int ret; + +@@ -216,6 +222,7 @@ + key.src = dst; + key.tos = tos; + key.oif = 0; ++ key.gw = 0; + key.iif = oif; + key.scope = RT_SCOPE_UNIVERSE; + +@@ -237,31 +244,35 @@ + goto e_inval_res; + *spec_dst = FIB_RES_PREFSRC(res); + fib_combine_itag(itag, &res); +-#ifdef CONFIG_IP_ROUTE_MULTIPATH +- if (FIB_RES_DEV(res) == dev || res.fi->fib_nhs > 1) +-#else + if (FIB_RES_DEV(res) == dev) +-#endif + { + ret = FIB_RES_NH(res).nh_scope >= RT_SCOPE_HOST; + fib_res_put(&res); + return ret; + } ++ table = FIB_RES_TABLE(&res); ++ prefixlen = res.prefixlen; ++ scope = res.scope; + fib_res_put(&res); + if (no_addr) + goto last_resort; +- if (rpf) +- goto e_inval; + key.oif = dev->ifindex; + + ret = 0; + if (fib_lookup(&key, &res) == 0) { +- if (res.type == RTN_UNICAST) { ++ if (res.type == RTN_UNICAST && ++ ((table == FIB_RES_TABLE(&res) && ++ res.prefixlen >= prefixlen && res.scope >= scope) || ++ !rpf)) { + *spec_dst = FIB_RES_PREFSRC(res); + ret = FIB_RES_NH(res).nh_scope >= RT_SCOPE_HOST; ++ fib_res_put(&res); ++ return ret; + } + fib_res_put(&res); + } ++ if (rpf) ++ goto e_inval; + return ret; + + last_resort: +@@ -579,9 +590,7 @@ + switch (event) { + case NETDEV_UP: + fib_add_ifaddr(ifa); +-#ifdef CONFIG_IP_ROUTE_MULTIPATH + fib_sync_up(ifa->ifa_dev->dev); +-#endif + rt_cache_flush(-1); + break; + case NETDEV_DOWN: +@@ -617,9 +626,7 @@ + for_ifa(in_dev) { + fib_add_ifaddr(ifa); + } endfor_ifa(in_dev); +-#ifdef CONFIG_IP_ROUTE_MULTIPATH + fib_sync_up(dev); +-#endif + rt_cache_flush(-1); + break; + case NETDEV_DOWN: +diff -ur v2.4.29/linux/net/ipv4/fib_hash.c linux/net/ipv4/fib_hash.c +--- v2.4.29/linux/net/ipv4/fib_hash.c 2003-08-25 22:06:13.000000000 +0300 ++++ linux/net/ipv4/fib_hash.c 2005-01-20 09:55:47.000651672 +0200 +@@ -71,6 +71,7 @@ + struct fib_info *fn_info; + #define FIB_INFO(f) ((f)->fn_info) + fn_key_t fn_key; ++ int fn_last_dflt; + u8 fn_tos; + u8 fn_type; + u8 fn_scope; +@@ -336,72 +337,123 @@ + return err; + } + +-static int fn_hash_last_dflt=-1; +- +-static int fib_detect_death(struct fib_info *fi, int order, +- struct fib_info **last_resort, int *last_idx) ++static int fib_detect_death(struct fib_info *fi, int order, int last_dflt, ++ struct fib_info **last_resort, int *last_idx, ++ int *last_nhsel, const struct rt_key *key) + { + struct neighbour *n; +- int state = NUD_NONE; ++ int nhsel; ++ int state; ++ struct fib_nh * nh; ++ u32 dst; ++ int flag, dead = 1; ++ ++ /* change_nexthops(fi) { */ ++ for (nhsel = 0, nh = fi->fib_nh; nhsel < fi->fib_nhs; nh++, nhsel++) { ++ if (key->oif && key->oif != nh->nh_oif) ++ continue; ++ if (key->gw && key->gw != nh->nh_gw && nh->nh_gw && ++ nh->nh_scope == RT_SCOPE_LINK) ++ continue; ++ if (nh->nh_flags & RTNH_F_DEAD) ++ continue; + +- n = neigh_lookup(&arp_tbl, &fi->fib_nh[0].nh_gw, fi->fib_dev); +- if (n) { +- state = n->nud_state; +- neigh_release(n); ++ flag = 0; ++ if (nh->nh_dev->flags & IFF_NOARP) { ++ dead = 0; ++ goto setfl; ++ } ++ ++ dst = nh->nh_gw; ++ if (!nh->nh_gw || nh->nh_scope != RT_SCOPE_LINK) ++ dst = key->dst; ++ ++ state = NUD_NONE; ++ n = neigh_lookup(&arp_tbl, &dst, nh->nh_dev); ++ if (n) { ++ state = n->nud_state; ++ neigh_release(n); ++ } ++ if (state==NUD_REACHABLE || ++ ((state&NUD_VALID) && order != last_dflt)) { ++ dead = 0; ++ goto setfl; ++ } ++ if (!(state&NUD_VALID)) ++ flag = 1; ++ if (!dead) ++ goto setfl; ++ if ((state&NUD_VALID) || ++ (*last_idx<0 && order >= last_dflt)) { ++ *last_resort = fi; ++ *last_idx = order; ++ *last_nhsel = nhsel; ++ } ++ ++ setfl: ++ ++ read_lock_bh(&fib_nhflags_lock); ++ if (flag) ++ nh->nh_flags |= RTNH_F_SUSPECT; ++ else ++ nh->nh_flags &= ~RTNH_F_SUSPECT; ++ read_unlock_bh(&fib_nhflags_lock); + } +- if (state==NUD_REACHABLE) +- return 0; +- if ((state&NUD_VALID) && order != fn_hash_last_dflt) +- return 0; +- if ((state&NUD_VALID) || +- (*last_idx<0 && order > fn_hash_last_dflt)) { +- *last_resort = fi; +- *last_idx = order; +- } +- return 1; ++ /* } endfor_nexthops(fi) */ ++ ++ return dead; + } + + static void + fn_hash_select_default(struct fib_table *tb, const struct rt_key *key, struct fib_result *res) + { +- int order, last_idx; +- struct fib_node *f; ++ int order, last_idx, last_dflt, last_nhsel; ++ struct fib_node *f, *first_node; + struct fib_info *fi = NULL; + struct fib_info *last_resort; + struct fn_hash *t = (struct fn_hash*)tb->tb_data; +- struct fn_zone *fz = t->fn_zones[0]; ++ struct fn_zone *fz = t->fn_zones[res->prefixlen]; ++ fn_key_t k; + + if (fz == NULL) + return; + ++ k = fz_key(key->dst, fz); ++ last_dflt = -2; ++ first_node = NULL; + last_idx = -1; + last_resort = NULL; ++ last_nhsel = 0; + order = -1; + + read_lock(&fib_hash_lock); +- for (f = fz->fz_hash[0]; f; f = f->fn_next) { ++ for (f = fz_chain(k, fz); f; f = f->fn_next) { + struct fib_info *next_fi = FIB_INFO(f); + +- if ((f->fn_state&FN_S_ZOMBIE) || ++ if (!fn_key_eq(k, f->fn_key) || ++ (f->fn_state&FN_S_ZOMBIE) || + f->fn_scope != res->scope || ++#ifdef CONFIG_IP_ROUTE_TOS ++ (f->fn_tos && f->fn_tos != key->tos) || ++#endif + f->fn_type != RTN_UNICAST) + continue; + + if (next_fi->fib_priority > res->fi->fib_priority) + break; +- if (!next_fi->fib_nh[0].nh_gw || next_fi->fib_nh[0].nh_scope != RT_SCOPE_LINK) +- continue; + f->fn_state |= FN_S_ACCESSED; + +- if (fi == NULL) { +- if (next_fi != res->fi) +- break; +- } else if (!fib_detect_death(fi, order, &last_resort, &last_idx)) { ++ if (!first_node) { ++ last_dflt = f->fn_last_dflt; ++ first_node = f; ++ } ++ if (fi && !fib_detect_death(fi, order, last_dflt, ++ &last_resort, &last_idx, &last_nhsel, key)) { + if (res->fi) + fib_info_put(res->fi); + res->fi = fi; + atomic_inc(&fi->fib_clntref); +- fn_hash_last_dflt = order; ++ first_node->fn_last_dflt = order; + goto out; + } + fi = next_fi; +@@ -409,16 +461,25 @@ + } + + if (order<=0 || fi==NULL) { +- fn_hash_last_dflt = -1; ++ if (fi && fi->fib_nhs > 1 && ++ fib_detect_death(fi, order, last_dflt, ++ &last_resort, &last_idx, &last_nhsel, key) && ++ last_resort == fi) { ++ read_lock_bh(&fib_nhflags_lock); ++ fi->fib_nh[last_nhsel].nh_flags &= ~RTNH_F_SUSPECT; ++ read_unlock_bh(&fib_nhflags_lock); ++ } ++ if (first_node) first_node->fn_last_dflt = -1; + goto out; + } + +- if (!fib_detect_death(fi, order, &last_resort, &last_idx)) { ++ if (!fib_detect_death(fi, order, last_dflt, &last_resort, &last_idx, ++ &last_nhsel, key)) { + if (res->fi) + fib_info_put(res->fi); + res->fi = fi; + atomic_inc(&fi->fib_clntref); +- fn_hash_last_dflt = order; ++ first_node->fn_last_dflt = order; + goto out; + } + +@@ -428,8 +489,11 @@ + res->fi = last_resort; + if (last_resort) + atomic_inc(&last_resort->fib_clntref); ++ read_lock_bh(&fib_nhflags_lock); ++ last_resort->fib_nh[last_nhsel].nh_flags &= ~RTNH_F_SUSPECT; ++ read_unlock_bh(&fib_nhflags_lock); ++ first_node->fn_last_dflt = last_idx; + } +- fn_hash_last_dflt = last_idx; + out: + read_unlock(&fib_hash_lock); + } +@@ -589,6 +653,7 @@ + + memset(new_f, 0, sizeof(struct fib_node)); + ++ new_f->fn_last_dflt = -1; + new_f->fn_key = key; + #ifdef CONFIG_IP_ROUTE_TOS + new_f->fn_tos = tos; +diff -ur v2.4.29/linux/net/ipv4/fib_rules.c linux/net/ipv4/fib_rules.c +--- v2.4.29/linux/net/ipv4/fib_rules.c 2004-02-19 00:23:39.000000000 +0200 ++++ linux/net/ipv4/fib_rules.c 2005-01-20 09:55:33.433714160 +0200 +@@ -307,6 +307,11 @@ + } + } + ++int fib_result_table(struct fib_result *res) ++{ ++ return res->r->r_table; ++} ++ + int fib_lookup(const struct rt_key *key, struct fib_result *res) + { + int err; +@@ -371,8 +376,10 @@ + + void fib_select_default(const struct rt_key *key, struct fib_result *res) + { +- if (res->r && res->r->r_action == RTN_UNICAST && +- FIB_RES_GW(*res) && FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK) { ++ if (res->r && ++ (res->r->r_action == RTN_UNICAST || res->r->r_action == RTN_NAT) && ++ ((FIB_RES_GW(*res) && FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK) || ++ FIB_RES_NH(*res).nh_scope == RT_SCOPE_HOST)) { + struct fib_table *tb; + if ((tb = fib_get_table(res->r->r_table)) != NULL) + tb->tb_select_default(tb, key, res); +diff -ur v2.4.29/linux/net/ipv4/fib_semantics.c linux/net/ipv4/fib_semantics.c +--- v2.4.29/linux/net/ipv4/fib_semantics.c 2003-08-25 22:06:13.000000000 +0300 ++++ linux/net/ipv4/fib_semantics.c 2005-01-20 09:55:47.000651672 +0200 +@@ -48,6 +48,7 @@ + static struct fib_info *fib_info_list; + static rwlock_t fib_info_lock = RW_LOCK_UNLOCKED; + int fib_info_cnt; ++rwlock_t fib_nhflags_lock = RW_LOCK_UNLOCKED; + + #define for_fib_info() { struct fib_info *fi; \ + for (fi = fib_info_list; fi; fi = fi->fib_next) +@@ -150,7 +151,7 @@ + #ifdef CONFIG_NET_CLS_ROUTE + nh->nh_tclassid != onh->nh_tclassid || + #endif +- ((nh->nh_flags^onh->nh_flags)&~RTNH_F_DEAD)) ++ ((nh->nh_flags^onh->nh_flags)&~RTNH_F_BADSTATE)) + return -1; + onh++; + } endfor_nexthops(fi); +@@ -166,7 +167,7 @@ + nfi->fib_prefsrc == fi->fib_prefsrc && + nfi->fib_priority == fi->fib_priority && + memcmp(nfi->fib_metrics, fi->fib_metrics, sizeof(fi->fib_metrics)) == 0 && +- ((nfi->fib_flags^fi->fib_flags)&~RTNH_F_DEAD) == 0 && ++ ((nfi->fib_flags^fi->fib_flags)&~RTNH_F_BADSTATE) == 0 && + (nfi->fib_nhs == 0 || nh_comp(fi, nfi) == 0)) + return fi; + } endfor_fib_info(); +@@ -365,8 +366,11 @@ + return -EINVAL; + if ((dev = __dev_get_by_index(nh->nh_oif)) == NULL) + return -ENODEV; +- if (!(dev->flags&IFF_UP)) +- return -ENETDOWN; ++ if (!(dev->flags&IFF_UP)) { ++ if (fi->fib_protocol != RTPROT_STATIC) ++ return -ENETDOWN; ++ nh->nh_flags |= RTNH_F_DEAD; ++ } + nh->nh_dev = dev; + dev_hold(dev); + nh->nh_scope = RT_SCOPE_LINK; +@@ -380,23 +384,48 @@ + /* It is not necessary, but requires a bit of thinking */ + if (key.scope < RT_SCOPE_LINK) + key.scope = RT_SCOPE_LINK; +- if ((err = fib_lookup(&key, &res)) != 0) +- return err; +- err = -EINVAL; +- if (res.type != RTN_UNICAST && res.type != RTN_LOCAL) +- goto out; +- nh->nh_scope = res.scope; +- nh->nh_oif = FIB_RES_OIF(res); +- if ((nh->nh_dev = FIB_RES_DEV(res)) == NULL) +- goto out; +- dev_hold(nh->nh_dev); +- err = -ENETDOWN; +- if (!(nh->nh_dev->flags & IFF_UP)) +- goto out; +- err = 0; ++ ++ err = fib_lookup(&key, &res); ++ if (err) { ++ struct in_device *in_dev; ++ ++ if (err != -ENETUNREACH || ++ fi->fib_protocol != RTPROT_STATIC) ++ return err; ++ ++ in_dev = inetdev_by_index(nh->nh_oif); ++ if (in_dev == NULL || ++ in_dev->dev->flags & IFF_UP) { ++ if (in_dev) ++ in_dev_put(in_dev); ++ return err; ++ } ++ nh->nh_flags |= RTNH_F_DEAD; ++ nh->nh_scope = RT_SCOPE_LINK; ++ nh->nh_dev = in_dev->dev; ++ dev_hold(nh->nh_dev); ++ in_dev_put(in_dev); ++ } else { ++ err = -EINVAL; ++ if (res.type != RTN_UNICAST && res.type != RTN_LOCAL) ++ goto out; ++ nh->nh_scope = res.scope; ++ nh->nh_oif = FIB_RES_OIF(res); ++ if ((nh->nh_dev = FIB_RES_DEV(res)) == NULL) ++ goto out; ++ dev_hold(nh->nh_dev); ++ if (!(nh->nh_dev->flags & IFF_UP)) { ++ if (fi->fib_protocol != RTPROT_STATIC) { ++ err = -ENETDOWN; ++ goto out; ++ } ++ nh->nh_flags |= RTNH_F_DEAD; ++ } ++ err = 0; + out: +- fib_res_put(&res); +- return err; ++ fib_res_put(&res); ++ return err; ++ } + } else { + struct in_device *in_dev; + +@@ -407,8 +436,11 @@ + if (in_dev == NULL) + return -ENODEV; + if (!(in_dev->dev->flags&IFF_UP)) { +- in_dev_put(in_dev); +- return -ENETDOWN; ++ if (fi->fib_protocol != RTPROT_STATIC) { ++ in_dev_put(in_dev); ++ return -ENETDOWN; ++ } ++ nh->nh_flags |= RTNH_F_DEAD; + } + nh->nh_dev = in_dev->dev; + dev_hold(nh->nh_dev); +@@ -603,8 +635,12 @@ + for_nexthops(fi) { + if (nh->nh_flags&RTNH_F_DEAD) + continue; +- if (!key->oif || key->oif == nh->nh_oif) +- break; ++ if (key->oif && key->oif != nh->nh_oif) ++ continue; ++ if (key->gw && key->gw != nh->nh_gw && ++ nh->nh_gw && nh->nh_scope == RT_SCOPE_LINK) ++ continue; ++ break; + } + #ifdef CONFIG_IP_ROUTE_MULTIPATH + if (nhsel < fi->fib_nhs) { +@@ -870,22 +906,35 @@ + if (local && fi->fib_prefsrc == local) { + fi->fib_flags |= RTNH_F_DEAD; + ret++; +- } else if (dev && fi->fib_nhs) { ++ } else if (fi->fib_nhs) { + int dead = 0; + + change_nexthops(fi) { +- if (nh->nh_flags&RTNH_F_DEAD) +- dead++; +- else if (nh->nh_dev == dev && +- nh->nh_scope != scope) { +- nh->nh_flags |= RTNH_F_DEAD; ++ if (nh->nh_flags&RTNH_F_DEAD) { ++ if (fi->fib_protocol!=RTPROT_STATIC || ++ nh->nh_dev == NULL || ++ !__in_dev_get(nh->nh_dev) || ++ nh->nh_dev->flags&IFF_UP) ++ dead++; ++ } else if ((nh->nh_dev == dev && dev && ++ nh->nh_scope != scope) || ++ (local == nh->nh_gw && local && ++ nh->nh_oif)) { ++ write_lock_bh(&fib_nhflags_lock); + #ifdef CONFIG_IP_ROUTE_MULTIPATH +- spin_lock_bh(&fib_multipath_lock); ++ spin_lock(&fib_multipath_lock); ++ nh->nh_flags |= RTNH_F_DEAD; + fi->fib_power -= nh->nh_power; + nh->nh_power = 0; +- spin_unlock_bh(&fib_multipath_lock); ++ spin_unlock(&fib_multipath_lock); ++#else ++ nh->nh_flags |= RTNH_F_DEAD; + #endif +- dead++; ++ write_unlock_bh(&fib_nhflags_lock); ++ if (fi->fib_protocol!=RTPROT_STATIC || ++ force || ++ (dev && __in_dev_get(dev) == NULL)) ++ dead++; + } + #ifdef CONFIG_IP_ROUTE_MULTIPATH + if (force > 1 && nh->nh_dev == dev) { +@@ -903,37 +952,55 @@ + return ret; + } + +-#ifdef CONFIG_IP_ROUTE_MULTIPATH +- + /* +- Dead device goes up. We wake up dead nexthops. +- It takes sense only on multipath routes. ++ Dead device goes up or new address is added. We wake up dead nexthops. + */ + + int fib_sync_up(struct net_device *dev) + { +- int ret = 0; ++ struct rt_key key; ++ struct fib_result res; ++ int ret, rep; + ++repeat: + if (!(dev->flags&IFF_UP)) + return 0; + ++ ret = 0; ++ rep = 0; + for_fib_info() { + int alive = 0; + + change_nexthops(fi) { +- if (!(nh->nh_flags&RTNH_F_DEAD)) { +- alive++; ++ if (!(nh->nh_flags&RTNH_F_DEAD)) + continue; +- } + if (nh->nh_dev == NULL || !(nh->nh_dev->flags&IFF_UP)) + continue; + if (nh->nh_dev != dev || __in_dev_get(dev) == NULL) + continue; ++ if (nh->nh_gw && fi->fib_protocol == RTPROT_STATIC) { ++ memset(&key, 0, sizeof(key)); ++ key.dst = nh->nh_gw; ++ key.oif = nh->nh_oif; ++ key.scope = nh->nh_scope; ++ if (fib_lookup(&key, &res) != 0) ++ continue; ++ if (res.type != RTN_UNICAST && ++ res.type != RTN_LOCAL) { ++ fib_res_put(&res); ++ continue; ++ } ++ nh->nh_scope = res.scope; ++ fib_res_put(&res); ++ rep = 1; ++ } + alive++; ++#ifdef CONFIG_IP_ROUTE_MULTIPATH + spin_lock_bh(&fib_multipath_lock); + nh->nh_power = 0; + nh->nh_flags &= ~RTNH_F_DEAD; + spin_unlock_bh(&fib_multipath_lock); ++#endif + } endfor_nexthops(fi) + + if (alive > 0) { +@@ -941,9 +1008,13 @@ + ret++; + } + } endfor_fib_info(); ++ if (rep) ++ goto repeat; + return ret; + } + ++#ifdef CONFIG_IP_ROUTE_MULTIPATH ++ + /* + The algorithm is suboptimal, but it provides really + fair weighted route distribution. +@@ -952,24 +1023,45 @@ + void fib_select_multipath(const struct rt_key *key, struct fib_result *res) + { + struct fib_info *fi = res->fi; +- int w; ++ int w, alive; + + spin_lock_bh(&fib_multipath_lock); ++ if (key->oif) { ++ int sel = -1; ++ w = -1; ++ change_nexthops(fi) { ++ if (key->oif != nh->nh_oif) ++ continue; ++ if (key->gw && key->gw != nh->nh_gw && ++ nh->nh_gw && nh->nh_scope == RT_SCOPE_LINK) ++ continue; ++ if (!(nh->nh_flags&RTNH_F_BADSTATE)) { ++ if (nh->nh_power > w) { ++ w = nh->nh_power; ++ sel = nhsel; ++ } ++ } ++ } endfor_nexthops(fi); ++ if (sel >= 0) { ++ spin_unlock_bh(&fib_multipath_lock); ++ res->nh_sel = sel; ++ return; ++ } ++ goto last_resort; ++ } ++ ++repeat: + if (fi->fib_power <= 0) { + int power = 0; + change_nexthops(fi) { +- if (!(nh->nh_flags&RTNH_F_DEAD)) { ++ if (!(nh->nh_flags&RTNH_F_BADSTATE)) { + power += nh->nh_weight; + nh->nh_power = nh->nh_weight; + } + } endfor_nexthops(fi); + fi->fib_power = power; +- if (power <= 0) { +- spin_unlock_bh(&fib_multipath_lock); +- /* Race condition: route has just become dead. */ +- res->nh_sel = 0; +- return; +- } ++ if (power <= 0) ++ goto last_resort; + } + + +@@ -979,20 +1071,40 @@ + + w = jiffies % fi->fib_power; + ++ alive = 0; + change_nexthops(fi) { +- if (!(nh->nh_flags&RTNH_F_DEAD) && nh->nh_power) { ++ if (!(nh->nh_flags&RTNH_F_BADSTATE) && nh->nh_power) { + if ((w -= nh->nh_power) <= 0) { + nh->nh_power--; + fi->fib_power--; +- res->nh_sel = nhsel; + spin_unlock_bh(&fib_multipath_lock); ++ res->nh_sel = nhsel; + return; + } ++ alive = 1; ++ } ++ } endfor_nexthops(fi); ++ if (alive) { ++ fi->fib_power = 0; ++ goto repeat; ++ } ++ ++last_resort: ++ ++ for_nexthops(fi) { ++ if (!(nh->nh_flags&RTNH_F_DEAD)) { ++ if (key->oif && key->oif != nh->nh_oif) ++ continue; ++ if (key->gw && key->gw != nh->nh_gw && ++ nh->nh_gw && nh->nh_scope == RT_SCOPE_LINK) ++ continue; ++ spin_unlock_bh(&fib_multipath_lock); ++ res->nh_sel = nhsel; ++ return; + } + } endfor_nexthops(fi); + + /* Race condition: route has just become dead. */ +- res->nh_sel = 0; + spin_unlock_bh(&fib_multipath_lock); + } + #endif +diff -ur v2.4.29/linux/net/ipv4/ip_nat_dumb.c linux/net/ipv4/ip_nat_dumb.c +--- v2.4.29/linux/net/ipv4/ip_nat_dumb.c 2001-11-13 03:25:26.000000000 +0200 ++++ linux/net/ipv4/ip_nat_dumb.c 2005-01-20 09:55:47.001651520 +0200 +@@ -124,6 +124,7 @@ + key.dst = ciph->saddr; + key.iif = skb->dev->ifindex; + key.oif = 0; ++ key.gw = 0; + #ifdef CONFIG_IP_ROUTE_TOS + key.tos = RT_TOS(ciph->tos); + #endif +diff -ur v2.4.29/linux/net/ipv4/netfilter/ip_fw_compat_masq.c linux/net/ipv4/netfilter/ip_fw_compat_masq.c +--- v2.4.29/linux/net/ipv4/netfilter/ip_fw_compat_masq.c 2005-01-20 09:25:34.000000000 +0200 ++++ linux/net/ipv4/netfilter/ip_fw_compat_masq.c 2005-01-20 09:55:47.001651520 +0200 +@@ -41,6 +41,10 @@ + enum ip_conntrack_info ctinfo; + struct ip_conntrack *ct; + unsigned int ret; ++ struct rtable *rt, *skb_rt; ++ struct net_device *skb_dev; ++ __u32 saddr; ++ int new; + + /* Sorry, only ICMP, TCP and UDP. */ + if (iph->protocol != IPPROTO_ICMP +@@ -64,22 +68,28 @@ + } + + info = &ct->nat.info; ++ iph = (*pskb)->nh.iph; ++ saddr = iph->saddr; ++ new = 0; + + WRITE_LOCK(&ip_nat_lock); + /* Setup the masquerade, if not already */ + if (!info->initialized) { + u_int32_t newsrc; +- struct rtable *rt; + struct ip_nat_multi_range range; + ++ skb_rt = (struct rtable *) (*pskb)->dst; ++ skb_dev = skb_rt->u.dst.dev; + /* Pass 0 instead of saddr, since it's going to be changed + anyway. */ +- if (ip_route_output(&rt, iph->daddr, 0, 0, 0) != 0) { ++ if (ip_route_output_lookup(&rt, iph->daddr, 0, RT_TOS(iph->tos), ++ skb_dev? skb_dev->ifindex : 0, ++ skb_dev? skb_rt->rt_gateway : 0) != 0) { ++ WRITE_UNLOCK(&ip_nat_lock); + DEBUGP("ipnat_rule_masquerade: Can't reroute.\n"); + return NF_DROP; + } +- newsrc = inet_select_addr(rt->u.dst.dev, rt->rt_gateway, +- RT_SCOPE_UNIVERSE); ++ newsrc = rt->rt_src; + ip_rt_put(rt); + range = ((struct ip_nat_multi_range) + { 1, +@@ -92,11 +102,31 @@ + WRITE_UNLOCK(&ip_nat_lock); + return ret; + } ++ new = 1; + } else + DEBUGP("Masquerading already done on this conn.\n"); + WRITE_UNLOCK(&ip_nat_lock); + +- return do_bindings(ct, ctinfo, info, NF_IP_POST_ROUTING, pskb); ++ ret = do_bindings(ct, ctinfo, info, NF_IP_POST_ROUTING, pskb); ++ if (ret != NF_ACCEPT || saddr == (*pskb)->nh.iph->saddr || new) ++ return ret; ++ ++ iph = (*pskb)->nh.iph; ++ if (ip_route_output(&rt, iph->daddr, iph->saddr, RT_TOS(iph->tos), 0) != 0) ++ return NF_DROP; ++ ++ skb_rt = (struct rtable *) (*pskb)->dst; ++ skb_dev = skb_rt->u.dst.dev; ++ if (skb_dev != rt->u.dst.dev || rt->rt_gateway != skb_rt->rt_gateway) { ++ if (skb_dev != rt->u.dst.dev) { ++ /* TODO: check the new mtu and reply FRAG_NEEDED */ ++ } ++ dst_release((*pskb)->dst); ++ (*pskb)->dst = &rt->u.dst; ++ } else { ++ ip_rt_put(rt); ++ } ++ return NF_ACCEPT; + } + + void +diff -ur v2.4.29/linux/net/ipv4/netfilter/ip_nat_core.c linux/net/ipv4/netfilter/ip_nat_core.c +--- v2.4.29/linux/net/ipv4/netfilter/ip_nat_core.c 2005-01-20 09:25:34.000000000 +0200 ++++ linux/net/ipv4/netfilter/ip_nat_core.c 2005-01-20 09:55:47.002651368 +0200 +@@ -994,6 +994,60 @@ + return NF_ACCEPT; + } + ++unsigned int ++ip_nat_route_input(unsigned int hooknum, ++ struct sk_buff **pskb, ++ const struct net_device *in, ++ const struct net_device *out, ++ int (*okfn)(struct sk_buff *)) ++{ ++ struct sk_buff *skb = *pskb; ++ struct iphdr *iph; ++ struct ip_conntrack *ct; ++ enum ip_conntrack_info ctinfo; ++ struct ip_nat_info *info; ++ enum ip_conntrack_dir dir; ++ __u32 saddr; ++ int i; ++ ++ if (!(ct = ip_conntrack_get(skb, &ctinfo))) ++ return NF_ACCEPT; ++ ++ info = &ct->nat.info; ++ if (!info->initialized) ++ return NF_ACCEPT; ++ ++ if (skb->dst) ++ return NF_ACCEPT; ++ ++ if (skb->len < sizeof(struct iphdr)) ++ return NF_ACCEPT; ++ ++ iph = skb->nh.iph; ++ saddr = iph->saddr; ++ hooknum = NF_IP_POST_ROUTING; ++ dir = CTINFO2DIR(ctinfo); ++ ++ READ_LOCK(&ip_nat_lock); ++ for (i = 0; i < info->num_manips; i++) { ++ if (info->manips[i].direction == dir ++ && info->manips[i].hooknum == hooknum ++ && info->manips[i].maniptype == IP_NAT_MANIP_SRC) { ++ saddr = info->manips[i].manip.ip; ++ } ++ } ++ READ_UNLOCK(&ip_nat_lock); ++ ++ if (saddr == iph->saddr) ++ return NF_ACCEPT; ++ ++ if (ip_route_input_lookup(skb, iph->daddr, iph->saddr, iph->tos, ++ skb->dev, saddr)) ++ return NF_DROP; ++ ++ return NF_ACCEPT; ++} ++ + int __init ip_nat_init(void) + { + size_t i; +diff -ur v2.4.29/linux/net/ipv4/netfilter/ip_nat_standalone.c linux/net/ipv4/netfilter/ip_nat_standalone.c +--- v2.4.29/linux/net/ipv4/netfilter/ip_nat_standalone.c 2005-01-20 09:25:34.000000000 +0200 ++++ linux/net/ipv4/netfilter/ip_nat_standalone.c 2005-01-20 09:55:47.002651368 +0200 +@@ -241,6 +241,9 @@ + /* Before packet filtering, change destination */ + static struct nf_hook_ops ip_nat_in_ops + = { { NULL, NULL }, ip_nat_in, PF_INET, NF_IP_PRE_ROUTING, NF_IP_PRI_NAT_DST }; ++/* Before routing, route before mangling */ ++static struct nf_hook_ops ip_nat_inr_ops ++= { { NULL, NULL }, ip_nat_route_input, PF_INET, NF_IP_PRE_ROUTING, NF_IP_PRI_LAST-1 }; + /* After packet filtering, change source */ + static struct nf_hook_ops ip_nat_out_ops + = { { NULL, NULL }, ip_nat_out, PF_INET, NF_IP_POST_ROUTING, NF_IP_PRI_NAT_SRC}; +@@ -309,10 +312,15 @@ + printk("ip_nat_init: can't register in hook.\n"); + goto cleanup_nat; + } ++ ret = nf_register_hook(&ip_nat_inr_ops); ++ if (ret < 0) { ++ printk("ip_nat_init: can't register inr hook.\n"); ++ goto cleanup_inops; ++ } + ret = nf_register_hook(&ip_nat_out_ops); + if (ret < 0) { + printk("ip_nat_init: can't register out hook.\n"); +- goto cleanup_inops; ++ goto cleanup_inrops; + } + ret = nf_register_hook(&ip_nat_local_out_ops); + if (ret < 0) { +@@ -332,6 +340,8 @@ + nf_unregister_hook(&ip_nat_local_out_ops); + cleanup_outops: + nf_unregister_hook(&ip_nat_out_ops); ++ cleanup_inrops: ++ nf_unregister_hook(&ip_nat_inr_ops); + cleanup_inops: + nf_unregister_hook(&ip_nat_in_ops); + cleanup_nat: +diff -ur v2.4.29/linux/net/ipv4/netfilter/ipt_MASQUERADE.c linux/net/ipv4/netfilter/ipt_MASQUERADE.c +--- v2.4.29/linux/net/ipv4/netfilter/ipt_MASQUERADE.c 2005-01-20 09:25:34.000000000 +0200 ++++ linux/net/ipv4/netfilter/ipt_MASQUERADE.c 2005-01-20 09:55:47.003651216 +0200 +@@ -87,7 +87,8 @@ + key.dst = (*pskb)->nh.iph->daddr; + key.src = 0; /* Unknown: that's what we're trying to establish */ + key.tos = RT_TOS((*pskb)->nh.iph->tos)|RTO_CONN; +- key.oif = 0; ++ key.oif = out->ifindex; ++ key.gw = ((struct rtable *) (*pskb)->dst)->rt_gateway; + #ifdef CONFIG_IP_ROUTE_FWMARK + key.fwmark = (*pskb)->nfmark; + #endif +@@ -98,13 +99,6 @@ + " No route: Rusty's brain broke!\n"); + return NF_DROP; + } +- if (rt->u.dst.dev != out) { +- if (net_ratelimit()) +- printk("MASQUERADE:" +- " Route sent us somewhere else.\n"); +- ip_rt_put(rt); +- return NF_DROP; +- } + + newsrc = rt->rt_src; + DEBUGP("newsrc = %u.%u.%u.%u\n", NIPQUAD(newsrc)); +diff -ur v2.4.29/linux/net/ipv4/route.c linux/net/ipv4/route.c +--- v2.4.29/linux/net/ipv4/route.c 2004-11-18 08:30:33.000000000 +0200 ++++ linux/net/ipv4/route.c 2005-01-20 09:55:47.004651064 +0200 +@@ -919,6 +919,7 @@ + + /* Gateway is different ... */ + rt->rt_gateway = new_gw; ++ if (rt->key.gw) rt->key.gw = new_gw; + + /* Redirect received -> path was valid */ + dst_confirm(&rth->u.dst); +@@ -1343,6 +1344,7 @@ + rth->key.fwmark = skb->nfmark; + #endif + rth->key.src = saddr; ++ rth->key.lsrc = 0; + rth->rt_src = saddr; + #ifdef CONFIG_IP_ROUTE_NAT + rth->rt_dst_map = daddr; +@@ -1356,6 +1358,7 @@ + rth->u.dst.dev = &loopback_dev; + dev_hold(rth->u.dst.dev); + rth->key.oif = 0; ++ rth->key.gw = 0; + rth->rt_gateway = daddr; + rth->rt_spec_dst= spec_dst; + rth->rt_type = RTN_MULTICAST; +@@ -1395,7 +1398,7 @@ + */ + + int ip_route_input_slow(struct sk_buff *skb, u32 daddr, u32 saddr, +- u8 tos, struct net_device *dev) ++ u8 tos, struct net_device *dev, u32 lsrc) + { + struct rt_key key; + struct fib_result res; +@@ -1415,16 +1418,17 @@ + goto out; + + key.dst = daddr; +- key.src = saddr; ++ key.src = lsrc? : saddr; + key.tos = tos; + #ifdef CONFIG_IP_ROUTE_FWMARK + key.fwmark = skb->nfmark; + #endif +- key.iif = dev->ifindex; ++ key.iif = lsrc? loopback_dev.ifindex : dev->ifindex; + key.oif = 0; ++ key.gw = 0; + key.scope = RT_SCOPE_UNIVERSE; + +- hash = rt_hash_code(daddr, saddr ^ (key.iif << 5), tos); ++ hash = rt_hash_code(daddr, saddr ^ (dev->ifindex << 5), tos); + + /* Check for the most weird martians, which can be not detected + by fib_lookup. +@@ -1445,6 +1449,12 @@ + 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. + */ +@@ -1454,6 +1464,10 @@ + goto no_route; + } + free_res = 1; ++ if (lsrc && res.type != RTN_UNICAST && res.type != RTN_NAT) ++ goto e_inval; ++ key.iif = dev->ifindex; ++ key.src = saddr; + + rt_cache_stat[smp_processor_id()].in_slow_tot++; + +@@ -1464,7 +1478,7 @@ + + if (1) { + u32 src_map = saddr; +- if (res.r) ++ if (res.r && !lsrc) + src_map = fib_rules_policy(saddr, &res, &flags); + + if (res.type == RTN_NAT) { +@@ -1503,8 +1517,9 @@ + if (res.type != RTN_UNICAST) + goto martian_destination; + ++ fib_select_default(&key, &res); + #ifdef CONFIG_IP_ROUTE_MULTIPATH +- if (res.fi->fib_nhs > 1 && key.oif == 0) ++ if (res.fi->fib_nhs > 1) + fib_select_multipath(&key, &res); + #endif + out_dev = in_dev_get(FIB_RES_DEV(res)); +@@ -1524,6 +1539,7 @@ + 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; +@@ -1550,6 +1566,7 @@ + #endif + rth->key.src = saddr; + rth->rt_src = saddr; ++ rth->key.lsrc = lsrc; + rth->rt_gateway = daddr; + #ifdef CONFIG_IP_ROUTE_NAT + rth->rt_src_map = key.src; +@@ -1562,6 +1579,7 @@ + rth->u.dst.dev = out_dev->dev; + dev_hold(rth->u.dst.dev); + rth->key.oif = 0; ++ rth->key.gw = 0; + rth->rt_spec_dst= spec_dst; + + rth->u.dst.input = ip_forward; +@@ -1572,7 +1590,8 @@ + rth->rt_flags = flags; + + #ifdef CONFIG_NET_FASTROUTE +- if (netdev_fastroute && !(flags&(RTCF_NAT|RTCF_MASQ|RTCF_DOREDIRECT))) { ++ if (netdev_fastroute && !(flags&(RTCF_NAT|RTCF_MASQ|RTCF_DOREDIRECT)) && ++ !lsrc) { + struct net_device *odev = rth->u.dst.dev; + if (odev != dev && + dev->accept_fastpath && +@@ -1595,6 +1614,8 @@ + 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); +@@ -1627,6 +1648,7 @@ + #endif + rth->key.src = saddr; + rth->rt_src = saddr; ++ rth->key.lsrc = 0; + #ifdef CONFIG_IP_ROUTE_NAT + rth->rt_dst_map = key.dst; + rth->rt_src_map = key.src; +@@ -1639,6 +1661,7 @@ + rth->u.dst.dev = &loopback_dev; + dev_hold(rth->u.dst.dev); + rth->key.oif = 0; ++ rth->key.gw = 0; + rth->rt_gateway = daddr; + rth->rt_spec_dst= spec_dst; + rth->u.dst.input= ip_local_deliver; +@@ -1704,8 +1727,9 @@ + goto e_inval; + } + +-int ip_route_input(struct sk_buff *skb, u32 daddr, u32 saddr, +- u8 tos, struct net_device *dev) ++static inline int ++ip_route_input_cached(struct sk_buff *skb, u32 daddr, u32 saddr, ++ u8 tos, struct net_device *dev, u32 lsrc) + { + struct rtable * rth; + unsigned hash; +@@ -1719,6 +1743,7 @@ + if (rth->key.dst == daddr && + rth->key.src == saddr && + rth->key.iif == iif && ++ rth->key.lsrc == lsrc && + rth->key.oif == 0 && + #ifdef CONFIG_IP_ROUTE_FWMARK + rth->key.fwmark == skb->nfmark && +@@ -1766,9 +1791,21 @@ + read_unlock(&inetdev_lock); + 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); ++} ++ + /* + * Major route resolver routine. + */ +@@ -1791,6 +1828,7 @@ + key.tos = tos & IPTOS_RT_MASK; + key.iif = loopback_dev.ifindex; + key.oif = oldkey->oif; ++ key.gw = oldkey->gw; + #ifdef CONFIG_IP_ROUTE_FWMARK + key.fwmark = oldkey->fwmark; + #endif +@@ -1880,6 +1918,7 @@ + dev_out = &loopback_dev; + dev_hold(dev_out); + key.oif = loopback_dev.ifindex; ++ key.gw = 0; + res.type = RTN_LOCAL; + flags |= RTCF_LOCAL; + goto make_route; +@@ -1887,7 +1926,7 @@ + + if (fib_lookup(&key, &res)) { + res.fi = NULL; +- if (oldkey->oif) { ++ if (oldkey->oif && dev_out->flags&IFF_UP) { + /* Apparently, routing tables are wrong. Assume, + that the destination is on link. + +@@ -1930,6 +1969,7 @@ + dev_out = &loopback_dev; + dev_hold(dev_out); + key.oif = dev_out->ifindex; ++ key.gw = 0; + if (res.fi) + fib_info_put(res.fi); + res.fi = NULL; +@@ -1937,13 +1977,12 @@ + goto make_route; + } + ++ if (res.type == RTN_UNICAST) ++ fib_select_default(&key, &res); + #ifdef CONFIG_IP_ROUTE_MULTIPATH +- if (res.fi->fib_nhs > 1 && key.oif == 0) ++ if (res.fi->fib_nhs > 1) + fib_select_multipath(&key, &res); +- else + #endif +- if (!res.prefixlen && res.type == RTN_UNICAST && !key.oif) +- fib_select_default(&key, &res); + + if (!key.src) + key.src = FIB_RES_PREFSRC(res); +@@ -2001,7 +2040,9 @@ + rth->key.tos = tos; + rth->key.src = oldkey->src; + rth->key.iif = 0; ++ rth->key.lsrc = 0; + rth->key.oif = oldkey->oif; ++ rth->key.gw = oldkey->gw; + #ifdef CONFIG_IP_ROUTE_FWMARK + rth->key.fwmark = oldkey->fwmark; + #endif +@@ -2080,6 +2121,7 @@ + rth->key.src == key->src && + rth->key.iif == 0 && + rth->key.oif == key->oif && ++ rth->key.gw == key->gw && + #ifdef CONFIG_IP_ROUTE_FWMARK + rth->key.fwmark == key->fwmark && + #endif +diff -ur v2.4.29/linux/net/netsyms.c linux/net/netsyms.c +--- v2.4.29/linux/net/netsyms.c 2005-01-20 09:25:34.000000000 +0200 ++++ linux/net/netsyms.c 2005-01-20 09:55:47.005650912 +0200 +@@ -260,6 +260,7 @@ + EXPORT_SYMBOL(inet_unregister_protosw); + EXPORT_SYMBOL(ip_route_output_key); + EXPORT_SYMBOL(ip_route_input); ++EXPORT_SYMBOL(ip_route_input_lookup); + EXPORT_SYMBOL(icmp_send); + EXPORT_SYMBOL(icmp_statistics); + EXPORT_SYMBOL(icmp_err_convert); |