Signed-off-by: Changli Gao <xiaosuo@xxxxxxxxx>
---
net/netfilter/ipvs/ip_vs_xmit.c | 41 ++++++++++++++++++++++++++--------------
1 file changed, 27 insertions(+), 14 deletions(-)
diff --git a/net/netfilter/ipvs/ip_vs_xmit.c b/net/netfilter/ipvs/ip_vs_xmit.c
index 1f2a4e3..a48239a 100644
--- a/net/netfilter/ipvs/ip_vs_xmit.c
+++ b/net/netfilter/ipvs/ip_vs_xmit.c
@@ -43,6 +43,13 @@
#include <net/ip_vs.h>
+enum {
+ IP_VS_RT_MODE_LOCAL = 1, /* Allow local dest */
+ IP_VS_RT_MODE_NON_LOCAL = 2, /* Allow non-local dest */
+ IP_VS_RT_MODE_RDR = 4, /* Allow redirect from remote daddr to
+ * local
+ */
+};
/*
* Destination cache to speed up outgoing route lookup
@@ -77,11 +84,7 @@ __ip_vs_dst_check(struct ip_vs_dest *dest, u32 rtos)
return dst;
}
-/*
- * Get route to destination or remote server
- * rt_mode: flags, &1=Allow local dest, &2=Allow non-local dest,
- * &4=Allow redirect from remote daddr to local
- */
+/* Get route to destination or remote server */
static struct rtable *
__ip_vs_get_out_rt(struct sk_buff *skb, struct ip_vs_dest *dest,
__be32 daddr, u32 rtos, int rt_mode)
@@ -126,15 +129,16 @@ __ip_vs_get_out_rt(struct sk_buff *skb, struct ip_vs_dest *dest,
}
local = rt->rt_flags & RTCF_LOCAL;
- if (!((local ? 1 : 2) & rt_mode)) {
+ if (!((local ? IP_VS_RT_MODE_LOCAL : IP_VS_RT_MODE_NON_LOCAL) &
+ rt_mode)) {
IP_VS_DBG_RL("Stopping traffic to %s address, dest: %pI4\n",
(rt->rt_flags & RTCF_LOCAL) ?
"local":"non-local", &rt->rt_dst);
ip_rt_put(rt);
return NULL;
}
- if (local && !(rt_mode & 4) && !((ort = skb_rtable(skb)) &&
- ort->rt_flags & RTCF_LOCAL)) {
+ if (local && !(rt_mode & IP_VS_RT_MODE_RDR) &&
+ !((ort = skb_rtable(skb)) && ort->rt_flags & RTCF_LOCAL)) {
IP_VS_DBG_RL("Redirect from non-local address %pI4 to local "
"requires NAT method, dest: %pI4\n",
&ip_hdr(skb)->daddr, &rt->rt_dst);
@@ -383,8 +387,8 @@ ip_vs_bypass_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
EnterFunction(10);
- if (!(rt = __ip_vs_get_out_rt(skb, NULL, iph->daddr,
- RT_TOS(iph->tos), 2)))
+ if (!(rt = __ip_vs_get_out_rt(skb, NULL, iph->daddr, RT_TOS(iph->tos),
+ IP_VS_RT_MODE_NON_LOCAL)))
goto tx_error_icmp;
/* MTU checking */
@@ -512,7 +516,10 @@ ip_vs_nat_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
}
if (!(rt = __ip_vs_get_out_rt(skb, cp->dest, cp->daddr.ip,
- RT_TOS(iph->tos), 1|2|4)))
+ RT_TOS(iph->tos),
+ IP_VS_RT_MODE_LOCAL |
+ IP_VS_RT_MODE_NON_LOCAL |
+ IP_VS_RT_MODE_RDR)))
goto tx_error_icmp;
local = rt->rt_flags & RTCF_LOCAL;
/*
@@ -755,7 +762,8 @@ ip_vs_tunnel_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
EnterFunction(10);
if (!(rt = __ip_vs_get_out_rt(skb, cp->dest, cp->daddr.ip,
- RT_TOS(tos), 1|2)))
+ RT_TOS(tos), IP_VS_RT_MODE_LOCAL |
+ IP_VS_RT_MODE_NON_LOCAL)))
goto tx_error_icmp;
if (rt->rt_flags & RTCF_LOCAL) {
ip_rt_put(rt);
@@ -984,7 +992,9 @@ ip_vs_dr_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
EnterFunction(10);
if (!(rt = __ip_vs_get_out_rt(skb, cp->dest, cp->daddr.ip,
- RT_TOS(iph->tos), 1|2)))
+ RT_TOS(iph->tos),
+ IP_VS_RT_MODE_LOCAL |
+ IP_VS_RT_MODE_NON_LOCAL)))
goto tx_error_icmp;
if (rt->rt_flags & RTCF_LOCAL) {
ip_rt_put(rt);
@@ -1128,7 +1138,10 @@ ip_vs_icmp_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
*/
if (!(rt = __ip_vs_get_out_rt(skb, cp->dest, cp->daddr.ip,
- RT_TOS(ip_hdr(skb)->tos), 1|2|4)))
+ RT_TOS(ip_hdr(skb)->tos),
+ IP_VS_RT_MODE_LOCAL |
+ IP_VS_RT_MODE_NON_LOCAL |
+ IP_VS_RT_MODE_RDR)))
goto tx_error_icmp;
local = rt->rt_flags & RTCF_LOCAL;
--
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