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/* -*- P4_16 -*- */
#ifndef PARSERS_P4
#define PARSERS_P4
/* to be included into the parser block */
state start {
meta.chk_icmp = 0;
meta.chk_icmp6 = 0;
meta.chk_icmp6_na_ns = 0;
meta.chk_ipv4 = 0;
meta.chk_udp_v6 = 0;
meta.chk_udp_v4 = 0;
meta.chk_tcp_v6 = 0;
meta.chk_tcp_v4 = 0;
meta.v4sum = 0;
meta.v6sum = 0;
meta.headerdiff = 0;
#ifdef _SUME_SWITCH_P4_
digest_data.unused = 0; /* avoid compiler warning */
#endif
packet.extract(hdr.ethernet);
transition select(hdr.ethernet.ethertype){
TYPE_IPV4: ipv4;
TYPE_IPV6: ipv6;
TYPE_ARP: arp;
default: accept;
}
}
state ipv4 {
packet.extract(hdr.ipv4);
meta.length_without_ip_header = hdr.ipv4.totalLen - 16w20;
transition select(hdr.ipv4.protocol){
PROTO_TCP: tcp;
PROTO_UDP: udp;
PROTO_ICMP: icmp;
default: accept;
}
}
state ipv6 {
packet.extract(hdr.ipv6);
meta.length_without_ip_header = hdr.ipv6.payload_length;
transition select(hdr.ipv6.next_header){
PROTO_TCP: tcp;
PROTO_UDP: udp;
PROTO_ICMP6: icmp6;
default: accept;
}
}
state icmp6 {
packet.extract(hdr.icmp6);
transition select(hdr.icmp6.type) {
ICMP6_NS: icmp6_neighbor_solicitation;
default: accept;
}
}
state icmp6_neighbor_solicitation {
packet.extract(hdr.icmp6_na_ns);
/* BUG: This MIGHT fail */
packet.extract(hdr.icmp6_option_link_layer_addr);
transition accept;
}
/* Leaf */
state tcp {
packet.extract(hdr.tcp);
transition accept;
}
state udp {
packet.extract(hdr.udp);
transition accept;
}
state icmp {
packet.extract(hdr.icmp);
transition accept;
}
state arp {
packet.extract(hdr.arp);
transition accept;
}
#endif