LVS
lvs-devel
Google
 
Web LinuxVirtualServer.org

[PATCH net-next,v2 13/13] ipvs: support scheduling inverse and icmp SCTP

To: <horms@xxxxxxxxxxxx>, <ja@xxxxxx>, <lvs-devel@xxxxxxxxxxxxxxx>
Subject: [PATCH net-next,v2 13/13] ipvs: support scheduling inverse and icmp SCTP packets
Cc: <alexgartrell@xxxxxxxxx>, <kernel-team@xxxxxx>, Alex Gartrell <agartrell@xxxxxx>
From: Alex Gartrell <agartrell@xxxxxx>
Date: Mon, 24 Aug 2015 16:44:45 -0700
In the event of an icmp packet, take only the ports instead of trying to
grab the full header.

In the event of an inverse packet, use the source address and port.

Signed-off-by: Alex Gartrell <agartrell@xxxxxx>
---
 net/netfilter/ipvs/ip_vs_proto_sctp.c | 40 ++++++++++++++++++++---------------
 1 file changed, 23 insertions(+), 17 deletions(-)

diff --git a/net/netfilter/ipvs/ip_vs_proto_sctp.c 
b/net/netfilter/ipvs/ip_vs_proto_sctp.c
index cd2984f..2026fca 100644
--- a/net/netfilter/ipvs/ip_vs_proto_sctp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_sctp.c
@@ -18,22 +18,24 @@ sctp_conn_schedule(int af, struct sk_buff *skb, struct 
ip_vs_proto_data *pd,
        struct netns_ipvs *ipvs;
        sctp_chunkhdr_t _schunkh, *sch;
        sctp_sctphdr_t *sh, _sctph;
-
-       if (ip_vs_iph_icmp(iph)) {
-               /* TEMPORARY - do not schedule icmp yet */
-               *verdict = NF_ACCEPT;
-               return 0;
-       }
-
-       sh = skb_header_pointer(skb, iph->len, sizeof(_sctph), &_sctph);
-       if (sh == NULL) {
-               *verdict = NF_DROP;
-               return 0;
+       __be16 _ports[2], *ports = NULL;
+
+       if (likely(!ip_vs_iph_icmp(iph))) {
+               sh = skb_header_pointer(skb, iph->len, sizeof(_sctph), &_sctph);
+               if (sh) {
+                       sch = skb_header_pointer(
+                               skb, iph->len + sizeof(sctp_sctphdr_t),
+                               sizeof(_schunkh), &_schunkh);
+                       if (sch && (sch->type == SCTP_CID_INIT ||
+                                   sysctl_sloppy_sctp(ipvs)))
+                               ports = &sh->source;
+               }
+       } else {
+               ports = skb_header_pointer(
+                       skb, iph->len, sizeof(_ports), &_ports);
        }
 
-       sch = skb_header_pointer(skb, iph->len + sizeof(sctp_sctphdr_t),
-                                sizeof(_schunkh), &_schunkh);
-       if (sch == NULL) {
+       if (!ports) {
                *verdict = NF_DROP;
                return 0;
        }
@@ -41,9 +43,13 @@ sctp_conn_schedule(int af, struct sk_buff *skb, struct 
ip_vs_proto_data *pd,
        net = skb_net(skb);
        ipvs = net_ipvs(net);
        rcu_read_lock();
-       if ((sch->type == SCTP_CID_INIT || sysctl_sloppy_sctp(ipvs)) &&
-           (svc = ip_vs_service_find(net, af, skb->mark, iph->protocol,
-                                     &iph->daddr, sh->dest))) {
+       if (likely(!ip_vs_iph_inverse(iph)))
+               svc = ip_vs_service_find(net, af, skb->mark, iph->protocol,
+                                        &iph->daddr, ports[1]);
+       else
+               svc = ip_vs_service_find(net, af, skb->mark, iph->protocol,
+                                        &iph->saddr, ports[0]);
+       if (svc) {
                int ignored;
 
                if (ip_vs_todrop(ipvs)) {
-- 
Alex Gartrell <agartrell@xxxxxx>

--
To unsubscribe from this list: send the line "unsubscribe lvs-devel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

<Prev in Thread] Current Thread [Next in Thread>