diff options
author | Anand Kumar <kumaranand@vmware.com> | 2017-08-15 15:29:04 -0700 |
---|---|---|
committer | Alin Gabriel Serdean <aserdean@ovn.org> | 2017-08-17 22:38:53 +0300 |
commit | 9fbb4a8a1031879e9c6d4d66ff24a2b034069084 (patch) | |
tree | 8e126d218a65f7419ee36f5bd24a027fe5e9e8e3 /datapath-windows | |
parent | a1930487b0c5846885f86fa29fd99f30a00bb5ae (diff) | |
download | openvswitch-9fbb4a8a1031879e9c6d4d66ff24a2b034069084.tar.gz |
datapath-windows: Do not modify port field for ICMP during SNAT/DNAT
During SNAT/DNAT, we should not be updating the port field of ct_endpoint
struct, as ICMP packets do not have port information. Since port and
icmp_id are overlapped in ct_endpoint struct, icmp_id gets changed.
As a result, NAT look up fails to find a matching entry.
This patch addresses this issue by not modifying icmp_id field during
SNAT/DNAT only for ICMP traffic
The current NAT module doesn't take the ICMP type/code into account
during the lookups. Fix this to make it similar with the other conntrack
module.
Acked-by: Shashank Ram <rams@vmware.com>
Acked-by: Alin Gabriel Serdean <aserdean@ovn.org>
Signed-off-by: Anand Kumar <kumaranand@vmware.com>
Signed-off-by: Alin Gabriel Serdean <aserdean@ovn.org>
Diffstat (limited to 'datapath-windows')
-rw-r--r-- | datapath-windows/ovsext/Conntrack-nat.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/datapath-windows/ovsext/Conntrack-nat.c b/datapath-windows/ovsext/Conntrack-nat.c index ae6b92c97..c778f1213 100644 --- a/datapath-windows/ovsext/Conntrack-nat.c +++ b/datapath-windows/ovsext/Conntrack-nat.c @@ -22,6 +22,12 @@ OvsHashNatKey(const OVS_CT_KEY *key) HASH_ADD(src.port); HASH_ADD(dst.port); HASH_ADD(zone); + /* icmp_id and port overlap in the union */ + HASH_ADD(src.icmp_type); + HASH_ADD(dst.icmp_type); + HASH_ADD(src.icmp_code); + HASH_ADD(dst.icmp_code); + #undef HASH_ADD return hash; } @@ -44,6 +50,11 @@ OvsNatKeyAreSame(const OVS_CT_KEY *key1, const OVS_CT_KEY *key2) FIELD_COMPARE(src.port); FIELD_COMPARE(dst.port); FIELD_COMPARE(zone); + /* icmp_id and port overlap in the union */ + FIELD_COMPARE(src.icmp_type); + FIELD_COMPARE(dst.icmp_type); + FIELD_COMPARE(src.icmp_code); + FIELD_COMPARE(dst.icmp_code); return TRUE; #undef FIELD_COMPARE } @@ -253,6 +264,7 @@ OvsNatAddEntry(OVS_NAT_ENTRY* entry) * Update an Conntrack entry with NAT information. Translated address and * port will be generated and write back to the conntrack entry as a * result. + * Note: For ICMP, only address is translated. *---------------------------------------------------------------------------- */ BOOLEAN @@ -271,7 +283,7 @@ OvsNatTranslateCtEntry(OVS_CT_ENTRY *entry) BOOLEAN allPortsTried; BOOLEAN originalPortsTried; struct ct_addr firstAddr; - + uint32_t hash = OvsNatHashRange(entry, 0); if ((entry->natInfo.natAction & NAT_ACTION_SRC) && @@ -310,10 +322,14 @@ OvsNatTranslateCtEntry(OVS_CT_ENTRY *entry) for (;;) { if (entry->natInfo.natAction & NAT_ACTION_SRC) { entry->rev_key.dst.addr = ctAddr; - entry->rev_key.dst.port = htons(port); + if (entry->rev_key.nw_proto != IPPROTO_ICMP) { + entry->rev_key.dst.port = htons(port); + } } else { entry->rev_key.src.addr = ctAddr; - entry->rev_key.src.port = htons(port); + if (entry->rev_key.nw_proto != IPPROTO_ICMP) { + entry->rev_key.src.port = htons(port); + } } OVS_NAT_ENTRY *natEntry = OvsNatLookup(&entry->rev_key, TRUE); |