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/*
* IPv4 field definitions for tcng
*
* Written 2001,2002 by Werner Almesberger
* Copyright 2001 EPFL-ICA, Network Robots
* Copyright 2002 Network Robots, Bivio Networks, Werner Almesberger
*/
#ifndef __INCLUDED_FROM_FIELDS_TC
#warning fields4.tc should only be included from fields.tc
#endif
#ifndef FIELDS4_TC
#define FIELDS4_TC
/* IP header. BSD-style naming (from /usr/include/netinet/ip.h) */
#ifdef USE_META_PROTOCOL
field ip_hdr = raw if meta_protocol == ETH_P_IP; /* base */
#else
field ip_hdr = raw; /* base */
#endif
field ip_v = ip_hdr[0] >> 4; /* version */
field ip_hl = ip_hdr[0] & 0xf; /* header length */
field ip_tos = ip_hdr[1].b; /* type of service */
field ip_len = ip_hdr[2].ns; /* total length */
field ip_id = ip_hdr[4].ns; /* identification */
field ip_RF = (ip_hdr[6].b >> 7) & 1; /* reserved fragment flag */
field ip_DF = (ip_hdr[6].b >> 6) & 1; /* don't fragment flag */
field ip_MF = (ip_hdr[6].b >> 5) & 1; /* more fragments flag */
field ip_off = ip_hdr[6].ns & 0x1fff; /* fragment offset field */
field ip_ttl = ip_hdr[8].b; /* time to live */
field ip_proto = ip_hdr[9].b; /* protocol */
field ip_sum = ip_hdr[10].ns; /* checksum */
field ip_src = ip_hdr[12].ipv4; /* source address */
field ip_dst = ip_hdr[16].ipv4; /* destination address */
field ip_options = ip_hdr[20]; /* beginning of options */
field ip_nexthdr = ip_hdr[ip_hl << 2]; /* next header */
/* UDP header. BSD-style naming (from /usr/include/netinet/udp.h) */
field udp_hdr = ip_nexthdr if ip_proto == IPPROTO_UDP;
field udp_sport = udp_hdr[0].ns; /* source port */
field udp_dport = udp_hdr[2].ns; /* destination port */
field udp_ulen = udp_hdr[4].ns; /* udp length */
field udp_sum = udp_hdr[6].ns; /* udp checksum */
field udp_data = udp_hdr[8]; /* data */
/* TCP header. BSD-style naming (from /usr/include/netinet/tcp.h) */
field tcp_hdr = ip_nexthdr if ip_proto == IPPROTO_TCP;
field tcp_sport = tcp_hdr[0].ns; /* source port */
field tcp_dport = tcp_hdr[2].ns; /* destination port */
field tcp_seq = tcp_hdr[4].nl; /* sequence number */
field tcp_ack = tcp_hdr[8].nl; /* acknowledgement number */
field tcp_off = tcp_hdr[12].b >> 4; /* data offset */
field tcp_URG = (tcp_hdr[13].b >> 5) & 1; /* URG */
field tcp_ACK = (tcp_hdr[13].b >> 4) & 1; /* ACK */
field tcp_PSH = (tcp_hdr[13].b >> 3) & 1; /* PSH */
field tcp_RST = (tcp_hdr[13].b >> 2) & 1; /* RST */
field tcp_SYN = (tcp_hdr[13].b >> 1) & 1; /* SYN */
field tcp_FIN = tcp_hdr[13].b & 1; /* FIN */
field tcp_win = tcp_hdr[14].ns; /* window */
field tcp_sum = tcp_hdr[16].ns; /* checksum */
field tcp_urp = tcp_hdr[18].ns; /* urgent pointer */
field tcp_options = tcp_hdr[20]; /* beginning of options */
field tcp_data = tcp_hdr[tcp_off << 2]; /* data */
/*
* @@@ This is of course nonsense. We can't usefully process TCP options,
* because tcc currently doesn't know how to loop.
*/
field tcpopt_mss = tcp_options[2].ns if tcp_options[0].b == TCPOPT_MAXSEG;
field tcpopt_wscale = tcp_options[2].b if tcp_options[0].b == TCPOPT_WINDOW;
field tcpopt_ts = tcp_options[2] if tcp_options[0].b == TCPOPT_TIMESTAMP;
field tcpopt_ts_value = tcpopt_ts[0].nl;
field tcpopt_ts_echo_reply = tcpopt_ts[4].nl;
/* ICMP header. BSD-style naming (from /usr/include/netinet/ip_icmp.h) */
field icmp_hdr = ip_nexthdr if ip_proto == IPPROTO_ICMP;
field icmp_type = icmp_hdr[0].b; /* type of message, see below */
field icmp_code = icmp_hdr[1].b; /* type sub code */
field icmp_sum = icmp_hdr[2].ns; /* checksum (was icmp_cksum) */
field icmp_data = icmp_hdr[4]; /* data */
/* IGMP header. From /usr/include/netinet/igmp.h */
field igmp_hdr = ip_nexthdr if ip_proto == IPPROTO_IGMP;
field igmp_type = igmp_hdr[0].b; /* IGMP type */
field igmp_code = igmp_hdr[1].b; /* routing code */
field igmp_sum = igmp_hdr[2].ns; /* checksum (was igmpcksum) */
field igmp_group = igmp_hdr[4].ipv4; /* group address */
#endif /* FIELDS4_TC */
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