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Order of actions matters

This commit is contained in:
Nico Schottelius 2019-03-14 14:39:17 +01:00
parent 7c8f019b2a
commit ab8e328dd3
1 changed files with 22 additions and 19 deletions
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41
p4src/static-mapping.p4
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@ -66,25 +66,7 @@ control MyIngress(inout headers hdr,
meta.cast_length = (bit<32>) hdr.ipv6.payload_length;
}
/* nat64_prefix is the same as the matching key, but without the mask */
action nat64_static(ipv4_addr_t v6_network, ipv4_addr_t v4_network, ipv6_addr_t nat64_prefix) {
ipv6_addr_t src_offset = hdr.ipv6.src_addr - v6_network;
ipv4_addr_t src = v4_network + (ipv4_addr_t) src_offset;
ipv6_addr_t dst = (ipv4_addr_t) hdr.ipv6.dst_addr - nat64_prefix;
nat64_generic(src, dst);
}
/* matching key: v4_network specified again */
action nat46_static(ipv6_addr_t v6_network, ipv4_addr_t v4_network, ipv6_addr_t nat64_prefix ) {
ipv6_addr_t src = nat64_prefix + (ipv6_addr_t) hdr.ipv4.src_addr;
ipv4_addr_t dst_offset = hdr.ipv4.dst_addr - v4_network;
ipv6_addr_t dst = v6_network + (ipv6_addr_t) dst_offset;
nat46_generic(src, dst);
}
/********************** NAT64 / NAT46 ACTIONS ***********************************/
/* NAT64 protocol unspecific changes */
action nat64_generic(ipv4_addr_t src, ipv4_addr_t dst) {
@ -133,6 +115,27 @@ control MyIngress(inout headers hdr,
}
/* nat64_prefix is the same as the matching key, but without the mask */
action nat64_static(ipv4_addr_t v6_network, ipv4_addr_t v4_network, ipv6_addr_t nat64_prefix) {
ipv6_addr_t src_offset = hdr.ipv6.src_addr - v6_network;
ipv4_addr_t src = v4_network + (ipv4_addr_t) src_offset;
ipv6_addr_t dst = (ipv4_addr_t) hdr.ipv6.dst_addr - nat64_prefix;
nat64_generic(src, dst);
}
/* matching key: v4_network specified again */
action nat46_static(ipv6_addr_t v6_network, ipv4_addr_t v4_network, ipv6_addr_t nat64_prefix ) {
ipv6_addr_t src = nat64_prefix + (ipv6_addr_t) hdr.ipv4.src_addr;
ipv4_addr_t dst_offset = hdr.ipv4.dst_addr - v4_network;
ipv6_addr_t dst = v6_network + (ipv6_addr_t) dst_offset;
nat46_generic(src, dst);
}
/********************** Reply to NDP for US ***********************************/
table ndp_answer {
key = {