94 lines
2 KiB
Text
94 lines
2 KiB
Text
/* -*- P4_16 -*- */
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#ifndef PARSERS_P4
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#define PARSERS_P4
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/* to be included into the parser block */
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state start {
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meta.chk_icmp = 0;
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meta.chk_icmp6 = 0;
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meta.chk_icmp6_na_ns = 0;
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meta.chk_ipv4 = 0;
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meta.chk_udp_v6 = 0;
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meta.chk_udp_v4 = 0;
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meta.chk_tcp_v6 = 0;
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meta.chk_tcp_v4 = 0;
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meta.v4sum = 0;
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meta.v6sum = 0;
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meta.headerdiff = 0;
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packet.extract(hdr.ethernet);
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transition select(hdr.ethernet.ethertype){
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TYPE_IPV4: ipv4;
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TYPE_IPV6: ipv6;
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TYPE_ARP: arp;
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default: accept;
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}
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}
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state ipv4 {
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packet.extract(hdr.ipv4);
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meta.length_without_ip_header = hdr.ipv4.totalLen - 16w20;
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transition select(hdr.ipv4.protocol){
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PROTO_TCP: tcp;
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PROTO_UDP: udp;
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PROTO_ICMP: icmp;
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default: accept;
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}
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}
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state ipv6 {
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packet.extract(hdr.ipv6);
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meta.length_without_ip_header = hdr.ipv6.payload_length;
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transition select(hdr.ipv6.next_header){
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PROTO_TCP: tcp;
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PROTO_UDP: udp;
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PROTO_ICMP6: icmp6;
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default: accept;
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}
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}
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state icmp6 {
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packet.extract(hdr.icmp6);
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transition select(hdr.icmp6.type) {
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ICMP6_NS: icmp6_neighbor_solicitation;
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default: accept;
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}
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}
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state icmp6_neighbor_solicitation {
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packet.extract(hdr.icmp6_na_ns);
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/* BUG: This MIGHT fail */
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packet.extract(hdr.icmp6_option_link_layer_addr);
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transition accept;
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}
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/* Leaf */
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state tcp {
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packet.extract(hdr.tcp);
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transition accept;
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}
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state udp {
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packet.extract(hdr.udp);
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transition accept;
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}
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state icmp {
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packet.extract(hdr.icmp);
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transition accept;
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}
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state arp {
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packet.extract(hdr.arp);
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transition accept;
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}
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#endif
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