语法问题，各位请指点

[njtlxm]

在winpcap的libpcap的grammer文件中有这么一段：
/* 'direction' qualifiers */
dqual: SRC { $$ = Q_SRC; }
¦ DST { $$ = Q_DST; }
¦ SRC OR DST { $$ = Q_OR; }
¦ DST OR SRC { $$ = Q_OR; }
¦ SRC AND DST { $$ = Q_AND; }
¦ DST AND SRC { $$ = Q_AND; }
;
/* address type qualifiers */
aqual: HOST { $$ = Q_HOST; }
¦ NET { $$ = Q_NET; }
¦ PORT { $$ = Q_PORT; }
;
/* non-directional address type qualifiers */
ndaqual: GATEWAY { $$ = Q_GATEWAY; }
;
pname: LINK { $$ = Q_LINK; }
¦ IP { $$ = Q_IP; }
¦ ARP { $$ = Q_ARP; }
¦ RARP { $$ = Q_RARP; }
¦ TCP { $$ = Q_TCP; }
¦ UDP { $$ = Q_UDP; }
¦ ICMP { $$ = Q_ICMP; }
¦ IGMP { $$ = Q_IGMP; }
¦ IGRP { $$ = Q_IGRP; }
¦ PIM { $$ = Q_PIM; }
¦ ATALK { $$ = Q_ATALK; }
¦ DECNET { $$ = Q_DECNET; }
¦ LAT { $$ = Q_LAT; }
¦ SCA { $$ = Q_SCA; }
¦ MOPDL { $$ = Q_MOPDL; }
¦ MOPRC { $$ = Q_MOPRC; }
¦ IPV6 { $$ = Q_IPV6; }
¦ ICMPV6 { $$ = Q_ICMPV6; }
¦ AH { $$ = Q_AH; }
¦ ESP { $$ = Q_ESP; }
;
other: pqual TK_BROADCAST { $$ = gen_broadcast($1); }
¦ pqual TK_MULTICAST { $$ = gen_multicast($1); }
¦ LESS NUM { $$ = gen_less($2); }
¦ GREATER NUM { $$ = gen_greater($2); }
¦ CBYTE NUM byteop NUM { $$ = gen_byteop($3, $2, $4); }
¦ INBOUND { $$ = gen_inbound(0); }
¦ OUTBOUND { $$ = gen_inbound(1); }
;
relop: '>' { $$ = BPF_JGT; }
¦ GEQ { $$ = BPF_JGE; }
¦ '=' { $$ = BPF_JEQ; }
;
irelop: LEQ { $$ = BPF_JGT; }
¦ '<' { $$ = BPF_JGE; }
¦ NEQ { $$ = BPF_JEQ; }
;
arth: pnum { $$ = gen_loadi($1); }
¦ narth
;
narth: pname '[' arth ']' { $$ = gen_load($1, $3, 1); }
¦ pname '[' arth ':' NUM ']' { $$ = gen_load($1, $3, $5); }
¦ arth '+' arth { $$ = gen_arth(BPF_ADD, $1, $3); }
¦ arth '-' arth { $$ = gen_arth(BPF_SUB, $1, $3); }
¦ arth '*' arth { $$ = gen_arth(BPF_MUL, $1, $3); }
¦ arth '/' arth { $$ = gen_arth(BPF_DIV, $1, $3); }
¦ arth '&' arth { $$ = gen_arth(BPF_AND, $1, $3); }
¦ arth '¦' arth { $$ = gen_arth(BPF_OR, $1, $3); }
¦ arth LSH arth { $$ = gen_arth(BPF_LSH, $1, $3); }
¦ arth RSH arth { $$ = gen_arth(BPF_RSH, $1, $3); }
¦ '-' arth %prec UMINUS { $$ = gen_neg($2); }
¦ paren narth ')' { $$ = $2; }
¦ LEN { $$ = gen_loadlen(); }
;
byteop: '&' { $$ = '&'; }
¦ '¦' { $$ = '¦'; }
¦ '<' { $$ = '<'; }
¦ '>' { $$ = '>'; }
¦ '=' { $$ = '='; }
;
pnum: NUM
¦ paren pnum ')' { $$ = $2; }
;
%%
是指输入filter字符串的格式（具体可以用windump －d来试验），大多数我已经试验成功了，但是不知道如何指定一个ip地址范围？好像inbound后面跟ip地址不行啊