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[PATCHv2 RFC 10/25] IPVS: Add protocol debug functions for IPv6

To: netdev@xxxxxxxxxxxxxxx, lvs-devel@xxxxxxxxxxxxxxx
Subject: [PATCHv2 RFC 10/25] IPVS: Add protocol debug functions for IPv6
Cc: horms@xxxxxxxxxxxx, kaber@xxxxxxxxx, vbusam@xxxxxxxxxx, Julius Volz <juliusv@xxxxxxxxxx>
From: Julius Volz <juliusv@xxxxxxxxxx>
Date: Mon, 1 Sep 2008 14:56:07 +0200
Add protocol (TCP, UDP, AH, ESP) debug functions for IPv6 packet debug
output.

Signed-off-by: Julius Volz <juliusv@xxxxxxxxxx>

 2 files changed, 93 insertions(+), 6 deletions(-)

diff --git a/net/ipv4/ipvs/ip_vs_proto.c b/net/ipv4/ipvs/ip_vs_proto.c
index 6099a88..50f6215 100644
--- a/net/ipv4/ipvs/ip_vs_proto.c
+++ b/net/ipv4/ipvs/ip_vs_proto.c
@@ -152,10 +152,10 @@ const char * ip_vs_state_name(__u16 proto, int state)
 
 
 void
-ip_vs_tcpudp_debug_packet(struct ip_vs_protocol *pp,
-                         const struct sk_buff *skb,
-                         int offset,
-                         const char *msg)
+ip_vs_tcpudp_debug_packet_v4(struct ip_vs_protocol *pp,
+                            const struct sk_buff *skb,
+                            int offset,
+                            const char *msg)
 {
        char buf[128];
        struct iphdr _iph, *ih;
@@ -189,6 +189,61 @@ ip_vs_tcpudp_debug_packet(struct ip_vs_protocol *pp,
        printk(KERN_DEBUG "IPVS: %s: %s\n", msg, buf);
 }
 
+#ifdef CONFIG_IP_VS_IPV6
+void
+ip_vs_tcpudp_debug_packet_v6(struct ip_vs_protocol *pp,
+                            const struct sk_buff *skb,
+                            int offset,
+                            const char *msg)
+{
+       char buf[192];
+       struct ipv6hdr _iph, *ih;
+
+       ih = skb_header_pointer(skb, offset, sizeof(_iph), &_iph);
+       if (ih == NULL)
+               sprintf(buf, "%s TRUNCATED", pp->name);
+       else if (ih->nexthdr == IPPROTO_FRAGMENT)
+               sprintf(buf, "%s " NIP6_FMT "->" NIP6_FMT " frag",
+                       pp->name, NIP6(ih->saddr),
+                       NIP6(ih->daddr));
+       else {
+               __be16 _ports[2], *pptr;
+
+               pptr = skb_header_pointer(skb, offset + sizeof(struct ipv6hdr),
+                                         sizeof(_ports), _ports);
+               if (pptr == NULL)
+                       sprintf(buf, "%s TRUNCATED " NIP6_FMT "->" NIP6_FMT,
+                               pp->name,
+                               NIP6(ih->saddr),
+                               NIP6(ih->daddr));
+               else
+                       sprintf(buf, "%s " NIP6_FMT ":%u->" NIP6_FMT ":%u",
+                               pp->name,
+                               NIP6(ih->saddr),
+                               ntohs(pptr[0]),
+                               NIP6(ih->daddr),
+                               ntohs(pptr[1]));
+       }
+
+       printk(KERN_DEBUG "IPVS: %s: %s\n", msg, buf);
+}
+#endif
+
+
+void
+ip_vs_tcpudp_debug_packet(struct ip_vs_protocol *pp,
+                         const struct sk_buff *skb,
+                         int offset,
+                         const char *msg)
+{
+#ifdef CONFIG_IP_VS_IPV6
+       if (skb->protocol == __constant_htons(ETH_P_IPV6))
+               ip_vs_tcpudp_debug_packet_v6(pp, skb, offset, msg);
+       else
+#endif
+               ip_vs_tcpudp_debug_packet_v4(pp, skb, offset, msg);
+}
+
 
 int __init ip_vs_protocol_init(void)
 {
diff --git a/net/ipv4/ipvs/ip_vs_proto_ah_esp.c 
b/net/ipv4/ipvs/ip_vs_proto_ah_esp.c
index 899df2e..86dc06e 100644
--- a/net/ipv4/ipvs/ip_vs_proto_ah_esp.c
+++ b/net/ipv4/ipvs/ip_vs_proto_ah_esp.c
@@ -125,8 +125,8 @@ ah_esp_conn_schedule(int af, struct sk_buff *skb, struct 
ip_vs_protocol *pp,
 
 
 static void
-ah_esp_debug_packet(struct ip_vs_protocol *pp, const struct sk_buff *skb,
-                   int offset, const char *msg)
+ah_esp_debug_packet_v4(struct ip_vs_protocol *pp, const struct sk_buff *skb,
+                      int offset, const char *msg)
 {
        char buf[256];
        struct iphdr _iph, *ih;
@@ -142,6 +142,38 @@ ah_esp_debug_packet(struct ip_vs_protocol *pp, const 
struct sk_buff *skb,
        printk(KERN_DEBUG "IPVS: %s: %s\n", msg, buf);
 }
 
+#ifdef CONFIG_IP_VS_IPV6
+static void
+ah_esp_debug_packet_v6(struct ip_vs_protocol *pp, const struct sk_buff *skb,
+                      int offset, const char *msg)
+{
+       char buf[256];
+       struct ipv6hdr _iph, *ih;
+
+       ih = skb_header_pointer(skb, offset, sizeof(_iph), &_iph);
+       if (ih == NULL)
+               sprintf(buf, "%s TRUNCATED", pp->name);
+       else
+               sprintf(buf, "%s " NIP6_FMT "->" NIP6_FMT,
+                       pp->name, NIP6(ih->saddr),
+                       NIP6(ih->daddr));
+
+       printk(KERN_DEBUG "IPVS: %s: %s\n", msg, buf);
+}
+#endif
+
+static void
+ah_esp_debug_packet(struct ip_vs_protocol *pp, const struct sk_buff *skb,
+                   int offset, const char *msg)
+{
+#ifdef CONFIG_IP_VS_IPV6
+       if (skb->protocol == __constant_htons(ETH_P_IPV6))
+               ah_esp_debug_packet_v6(pp, skb, offset, msg);
+       else
+#endif
+               ah_esp_debug_packet_v4(pp, skb, offset, msg);
+}
+
 
 static void ah_esp_init(struct ip_vs_protocol *pp)
 {
-- 
1.5.4.5

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