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[P4] basic headers

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Nico Schottelius 2019-02-21 23:11:02 +01:00
parent d20c8a0a8b
commit 7f904bdcef
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/* -*- P4_16 -*- */
#ifndef HEADERS_P4
#define HEADERS_P4
#include <core.p4>
#include <v1model.p4>
typedef bit<48> mac_addr_t;
typedef bit<32> ipv4_addr_t;
typedef bit<128> ipv6_addr_t;
typedef bit<9> port_t;
const bit<16> TYPE_IPV4 = 0x0800;
const bit<16> TYPE_IPV6 = 0x86DD;
const bit<8> TYPE_TCP = 6;
header ethernet_t {
mac_addr_t dst_addr;
mac_addr_t src_addr;
bit<16> ethertype;
}
header ipv4_t {
bit<4> version;
bit<4> ihl;
bit<6> diff_serv;
bit<2> ecn;
bit<16> totalLen;
bit<16> identification;
bit<3> flags;
bit<13> fragOffset;
bit<8> ttl;
bit<8> protocol;
bit<16> hdrChecksum;
ipv4_addr_t src_addr;
ipv4_addr_t dst_addr;
}
/* https://en.wikipedia.org/wiki/IPv6_packet */
header ipv6_t {
bit<4> version;
bit<8> traffic_class;
bit<20> flow_label;
bit<16> payload_length;
bit<8> next_header;
bit<8> hop_limit;
ipv6_addr_t src_addr;
ipv6_addr_t dst_addr;
}
header tcp_t{
bit<16> src_port;
bit<16> dst_port;
int<32> seqNo;
int<32> ackNo;
bit<4> data_offset;
bit<4> res;
bit<1> cwr;
bit<1> ece;
bit<1> urg;
bit<1> ack;
bit<1> psh;
bit<1> rst;
bit<1> syn;
bit<1> fin;
bit<16> window;
bit<16> checksum;
bit<16> urgentPtr;
}
struct headers {
ethernet_t ethernet;
ipv4_t ipv4;
ipv6_t ipv6;
tcp_t tcp;
rewrite_header_t rewrite;
}
#endif