| line ::= iface | arp | send | defrouter | ipv4line . |
| |
| iface ::= ifhdr "{" ifaceopts "}" ";" . |
| ifhdr ::= "interface" | "iface" . |
| ifaceopts ::= "ifname" name | "mtu" mtu | "v4addr" ipaddr | |
| "eaddr" eaddr . |
| |
| send ::= "send" ";" | "send" "{" sendbodyopts "}" ";" . |
| sendbodyopts ::= sendbody [ sendbodyopts ] . |
| sendbody ::= "ifname" name | "via" ipaddr . |
| |
| defrouter ::= "router" ipaddr . |
| |
| arp ::= "arp" "{" arpbodyopts "}" ";" . |
| arpbodyopts ::= arpbody [ arpbodyopts ] . |
| arpbody ::= "v4addr" ipaddr | "eaddr" eaddr . |
| |
| bodyline ::= ipv4line | tcpline | udpline | icmpline | dataline . |
| |
| ipv4line ::= "ipv4" "{" ipv4bodyopts "}" ";" . |
| ipv4bodyopts ::= ipv4body [ ipv4bodyopts ] | bodyline . |
| ipv4body ::= "proto" protocol | "src" ipaddr | "dst" ipaddr | |
| "off" number | "v" number | "hl" number| "id" number | |
| "ttl" number | "tos" number | "sum" number | "len" number | |
| "opt" "{" ipv4optlist "}" ";" . |
| ipv4optlist ::= ipv4option [ ipv4optlist ] . |
| ipv4optlist = "nop" | "rr" | "zsu" | "mtup" | "mtur" | "encode" | "ts" | |
| "tr" | "sec" | "lsrr" | "e-sec" | "cipso" | "satid" | |
| "ssrr" | "addext" | "visa" | "imitd" | "eip" | "finn" | |
| "secclass" ipv4secclass. |
| ipv4secclass := "unclass" | "confid" | "reserv-1" | "reserv-2" | |
| "reserv-3" | "reserv-4" | "secret" | "topsecret" . |
| |
| tcpline ::= "tcp" "{" tcpbodyopts "}" ";" . |
| tcpbodyopts ::= tcpbody [ tcpbodyopts ] | bodyline . |
| tcpbody ::= "sport" port | "dport" port | "seq" number | "ack" number | |
| "off" number | "urp" number | "win" number | "sum" number | |
| "flags" tcpflags | data . |
| |
| udpline ::= "udp" "{" udpbodyopts "}" ";" . |
| udpbodyopts ::= udpbody [ udpbodyopts ] | bodyline . |
| udpbody ::= "sport" port | "dport" port | "len" number | "sum" number | |
| data . |
| |
| icmpline ::= "icmp" "{" icmpbodyopts "}" ";" . |
| icmpbodyopts ::= icmpbody [ icmpbodyopts ] | bodyline . |
| icmpbody ::= "type" icmptype [ "code" icmpcode ] . |
| icmptype ::= "echorep" | "echorep" "{" echoopts "}" ";" | "unreach" | |
| "unreach" "{" unreachtype "}" ";" | "squench" | "redir" | |
| "redir" "{" redirtype "}" ";" | "echo" "{" echoopts "}" ";" | |
| "echo" | "routerad" | "routersol" | "timex" | |
| "timex" "{" timextype "}" ";" | "paramprob" | |
| "paramprob" "{" parapptype "}" ";" | "timest" | "timestrep" | |
| "inforeq" | "inforep" | "maskreq" | "maskrep" . |
| |
| echoopts ::= echoopts [ icmpechoopts ] . |
| unreachtype ::= "net-unr" | "host-unr" | "proto-unr" | "port-unr" | |
| "needfrag" | "srcfail" | "net-unk" | "host-unk" | "isolate" | |
| "net-prohib" | "host-prohib" | "net-tos" | "host-tos" | |
| "filter-prohib" | "host-preced" | "cutoff-preced" . |
| redirtype ::= "net-redir" | "host-redir" | "tos-net-redir" | |
| "tos-host-redir" . |
| timextype ::= "intrans" | "reass" . |
| paramptype ::= "optabsent" . |
| |
| data ::= "data" "{" databodyopts "}" ";" . |
| databodyopts ::= "len" number | "value" string | "file" filename . |
| |
| icmpechoopts ::= "icmpseq" number | "icmpid" number . |