You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
597 lines
17 KiB
597 lines
17 KiB
%top {
|
|
/* Must come first for _LARGE_FILE_API on AIX. */
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
|
|
/*
|
|
* Must come first to avoid warnings on Windows.
|
|
*
|
|
* Flex-generated scanners may only include <inttypes.h> if __STDC_VERSION__
|
|
* is defined with a value >= 199901, meaning "full C99", and MSVC may not
|
|
* define it with that value, because it isn't 100% C99-compliant, even
|
|
* though it has an <inttypes.h> capable of defining everything the Flex
|
|
* scanner needs.
|
|
*
|
|
* We, however, will include it if we know we have an MSVC version that has
|
|
* it; this means that we may define the INTn_MAX and UINTn_MAX values in
|
|
* scanner.c, and then include <stdint.h>, which may define them differently
|
|
* (same value, but different string of characters), causing compiler warnings.
|
|
*
|
|
* If we include it here, and they're defined, that'll prevent scanner.c
|
|
* from defining them. So we include <pcap/pcap-inttypes.h>, to get
|
|
* <inttypes.h> if we have it.
|
|
*/
|
|
#include <pcap/pcap-inttypes.h>
|
|
|
|
#include "diag-control.h"
|
|
}
|
|
|
|
/*
|
|
* We want a reentrant scanner.
|
|
*/
|
|
%option reentrant
|
|
|
|
/*
|
|
* And we need to pass the compiler state to the scanner.
|
|
*/
|
|
%option extra-type="compiler_state_t *"
|
|
|
|
/*
|
|
* We don't use input, so don't generate code for it.
|
|
*/
|
|
%option noinput
|
|
|
|
/*
|
|
* We don't use unput, so don't generate code for it.
|
|
*/
|
|
%option nounput
|
|
|
|
/*
|
|
* We don't read from the terminal.
|
|
*/
|
|
%option never-interactive
|
|
|
|
/*
|
|
* We want to stop processing when we get to the end of the input.
|
|
*/
|
|
%option noyywrap
|
|
|
|
/*
|
|
* We want to generate code that can be used by a reentrant parser
|
|
* generated by Bison or Berkeley YACC.
|
|
*/
|
|
%option bison-bridge
|
|
|
|
%{
|
|
/*
|
|
* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that: (1) source code distributions
|
|
* retain the above copyright notice and this paragraph in its entirety, (2)
|
|
* distributions including binary code include the above copyright notice and
|
|
* this paragraph in its entirety in the documentation or other materials
|
|
* provided with the distribution, and (3) all advertising materials mentioning
|
|
* features or use of this software display the following acknowledgement:
|
|
* ``This product includes software developed by the University of California,
|
|
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
|
|
* the University nor the names of its contributors may be used to endorse
|
|
* or promote products derived from this software without specific prior
|
|
* written permission.
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
*/
|
|
|
|
#include <string.h>
|
|
|
|
#include "pcap-int.h"
|
|
|
|
#include "gencode.h"
|
|
|
|
#include "grammar.h"
|
|
|
|
/*
|
|
* Earlier versions of Flex don't declare these, so we declare them
|
|
* ourselves to squelch warnings.
|
|
*/
|
|
int pcap_get_column(yyscan_t);
|
|
void pcap_set_column(int, yyscan_t);
|
|
|
|
#ifdef INET6
|
|
|
|
#ifdef _WIN32
|
|
#include <winsock2.h>
|
|
#include <ws2tcpip.h>
|
|
/*
|
|
* To quote the MSDN page for getaddrinfo() at
|
|
*
|
|
* https://msdn.microsoft.com/en-us/library/windows/desktop/ms738520(v=vs.85).aspx
|
|
*
|
|
* "Support for getaddrinfo on Windows 2000 and older versions
|
|
* The getaddrinfo function was added to the Ws2_32.dll on Windows XP and
|
|
* later. To execute an application that uses this function on earlier
|
|
* versions of Windows, then you need to include the Ws2tcpip.h and
|
|
* Wspiapi.h files. When the Wspiapi.h include file is added, the
|
|
* getaddrinfo function is defined to the WspiapiGetAddrInfo inline
|
|
* function in the Wspiapi.h file. At runtime, the WspiapiGetAddrInfo
|
|
* function is implemented in such a way that if the Ws2_32.dll or the
|
|
* Wship6.dll (the file containing getaddrinfo in the IPv6 Technology
|
|
* Preview for Windows 2000) does not include getaddrinfo, then a
|
|
* version of getaddrinfo is implemented inline based on code in the
|
|
* Wspiapi.h header file. This inline code will be used on older Windows
|
|
* platforms that do not natively support the getaddrinfo function."
|
|
*
|
|
* We use getaddrinfo(), so we include Wspiapi.h here.
|
|
*/
|
|
#include <wspiapi.h>
|
|
#else /* _WIN32 */
|
|
#include <sys/socket.h> /* for "struct sockaddr" in "struct addrinfo" */
|
|
#include <netdb.h> /* for "struct addrinfo" */
|
|
#endif /* _WIN32 */
|
|
|
|
/* Workaround for AIX 4.3 */
|
|
#if !defined(AI_NUMERICHOST)
|
|
#define AI_NUMERICHOST 0x04
|
|
#endif
|
|
|
|
#endif /*INET6*/
|
|
|
|
#include <pcap/namedb.h>
|
|
#include "grammar.h"
|
|
|
|
#ifdef HAVE_OS_PROTO_H
|
|
#include "os-proto.h"
|
|
#endif
|
|
|
|
static int stou(char *, YYSTYPE *, compiler_state_t *);
|
|
|
|
/*
|
|
* Disable diagnostics in the code generated by Flex.
|
|
*/
|
|
DIAG_OFF_FLEX
|
|
|
|
%}
|
|
|
|
N ([0-9]+|(0X|0x)[0-9A-Fa-f]+)
|
|
B ([0-9A-Fa-f][0-9A-Fa-f]?)
|
|
B2 ([0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f])
|
|
W ([0-9A-Fa-f][0-9A-Fa-f]?[0-9A-Fa-f]?[0-9A-Fa-f]?)
|
|
|
|
%a 18400
|
|
%o 21500
|
|
%e 7600
|
|
%k 4550
|
|
%p 27600
|
|
%n 2000
|
|
|
|
V680 {W}:{W}:{W}:{W}:{W}:{W}:{W}:{W}
|
|
|
|
V670 ::{W}:{W}:{W}:{W}:{W}:{W}:{W}
|
|
V671 {W}::{W}:{W}:{W}:{W}:{W}:{W}
|
|
V672 {W}:{W}::{W}:{W}:{W}:{W}:{W}
|
|
V673 {W}:{W}:{W}::{W}:{W}:{W}:{W}
|
|
V674 {W}:{W}:{W}:{W}::{W}:{W}:{W}
|
|
V675 {W}:{W}:{W}:{W}:{W}::{W}:{W}
|
|
V676 {W}:{W}:{W}:{W}:{W}:{W}::{W}
|
|
V677 {W}:{W}:{W}:{W}:{W}:{W}:{W}::
|
|
|
|
V660 ::{W}:{W}:{W}:{W}:{W}:{W}
|
|
V661 {W}::{W}:{W}:{W}:{W}:{W}
|
|
V662 {W}:{W}::{W}:{W}:{W}:{W}
|
|
V663 {W}:{W}:{W}::{W}:{W}:{W}
|
|
V664 {W}:{W}:{W}:{W}::{W}:{W}
|
|
V665 {W}:{W}:{W}:{W}:{W}::{W}
|
|
V666 {W}:{W}:{W}:{W}:{W}:{W}::
|
|
|
|
V650 ::{W}:{W}:{W}:{W}:{W}
|
|
V651 {W}::{W}:{W}:{W}:{W}
|
|
V652 {W}:{W}::{W}:{W}:{W}
|
|
V653 {W}:{W}:{W}::{W}:{W}
|
|
V654 {W}:{W}:{W}:{W}::{W}
|
|
V655 {W}:{W}:{W}:{W}:{W}::
|
|
|
|
V640 ::{W}:{W}:{W}:{W}
|
|
V641 {W}::{W}:{W}:{W}
|
|
V642 {W}:{W}::{W}:{W}
|
|
V643 {W}:{W}:{W}::{W}
|
|
V644 {W}:{W}:{W}:{W}::
|
|
|
|
V630 ::{W}:{W}:{W}
|
|
V631 {W}::{W}:{W}
|
|
V632 {W}:{W}::{W}
|
|
V633 {W}:{W}:{W}::
|
|
|
|
V620 ::{W}:{W}
|
|
V621 {W}::{W}
|
|
V622 {W}:{W}::
|
|
|
|
V610 ::{W}
|
|
V611 {W}::
|
|
|
|
V600 ::
|
|
|
|
V6604 {W}:{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
|
|
|
|
V6504 ::{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
|
|
V6514 {W}::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
|
|
V6524 {W}:{W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
|
|
V6534 {W}:{W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
|
|
V6544 {W}:{W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
|
|
V6554 {W}:{W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
|
|
|
|
V6404 ::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
|
|
V6414 {W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
|
|
V6424 {W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
|
|
V6434 {W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
|
|
V6444 {W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
|
|
|
|
V6304 ::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
|
|
V6314 {W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
|
|
V6324 {W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
|
|
V6334 {W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
|
|
|
|
V6204 ::{W}:{W}:{N}\.{N}\.{N}\.{N}
|
|
V6214 {W}::{W}:{N}\.{N}\.{N}\.{N}
|
|
V6224 {W}:{W}::{N}\.{N}\.{N}\.{N}
|
|
|
|
V6104 ::{W}:{N}\.{N}\.{N}\.{N}
|
|
V6114 {W}::{N}\.{N}\.{N}\.{N}
|
|
|
|
V6004 ::{N}\.{N}\.{N}\.{N}
|
|
|
|
|
|
V6 ({V680}|{V670}|{V671}|{V672}|{V673}|{V674}|{V675}|{V676}|{V677}|{V660}|{V661}|{V662}|{V663}|{V664}|{V665}|{V666}|{V650}|{V651}|{V652}|{V653}|{V654}|{V655}|{V640}|{V641}|{V642}|{V643}|{V644}|{V630}|{V631}|{V632}|{V633}|{V620}|{V621}|{V622}|{V610}|{V611}|{V600}|{V6604}|{V6504}|{V6514}|{V6524}|{V6534}|{V6544}|{V6554}|{V6404}|{V6414}|{V6424}|{V6434}|{V6444}|{V6304}|{V6314}|{V6324}|{V6334}|{V6204}|{V6214}|{V6224}|{V6104}|{V6114}|{V6004})
|
|
|
|
MAC ({B}:{B}:{B}:{B}:{B}:{B}|{B}\-{B}\-{B}\-{B}\-{B}\-{B}|{B}\.{B}\.{B}\.{B}\.{B}\.{B}|{B2}\.{B2}\.{B2}|{B2}{3})
|
|
|
|
|
|
|
|
%%
|
|
dst return DST;
|
|
src return SRC;
|
|
|
|
link|ether|ppp|slip return LINK;
|
|
fddi|tr|wlan return LINK;
|
|
arp return ARP;
|
|
rarp return RARP;
|
|
ip return IP;
|
|
sctp return SCTP;
|
|
tcp return TCP;
|
|
udp return UDP;
|
|
icmp return ICMP;
|
|
igmp return IGMP;
|
|
igrp return IGRP;
|
|
pim return PIM;
|
|
vrrp return VRRP;
|
|
carp return CARP;
|
|
radio return RADIO;
|
|
|
|
ip6 return IPV6;
|
|
icmp6 return ICMPV6;
|
|
ah return AH;
|
|
esp return ESP;
|
|
|
|
atalk return ATALK;
|
|
aarp return AARP;
|
|
decnet return DECNET;
|
|
lat return LAT;
|
|
sca return SCA;
|
|
moprc return MOPRC;
|
|
mopdl return MOPDL;
|
|
|
|
iso return ISO;
|
|
esis return ESIS;
|
|
es-is return ESIS;
|
|
isis return ISIS;
|
|
is-is return ISIS;
|
|
l1 return L1;
|
|
l2 return L2;
|
|
iih return IIH;
|
|
lsp return LSP;
|
|
snp return SNP;
|
|
csnp return CSNP;
|
|
psnp return PSNP;
|
|
|
|
clnp return CLNP;
|
|
|
|
stp return STP;
|
|
|
|
ipx return IPX;
|
|
|
|
netbeui return NETBEUI;
|
|
|
|
host return HOST;
|
|
net return NET;
|
|
mask return NETMASK;
|
|
port return PORT;
|
|
portrange return PORTRANGE;
|
|
proto return PROTO;
|
|
protochain return PROTOCHAIN;
|
|
|
|
gateway return GATEWAY;
|
|
|
|
type return TYPE;
|
|
subtype return SUBTYPE;
|
|
direction|dir return DIR;
|
|
address1|addr1 return ADDR1;
|
|
address2|addr2 return ADDR2;
|
|
address3|addr3 return ADDR3;
|
|
address4|addr4 return ADDR4;
|
|
ra return RA;
|
|
ta return TA;
|
|
|
|
less return LESS;
|
|
greater return GREATER;
|
|
byte return CBYTE;
|
|
broadcast return TK_BROADCAST;
|
|
multicast return TK_MULTICAST;
|
|
|
|
and|"&&" return AND;
|
|
or|"||" return OR;
|
|
not return '!';
|
|
|
|
len|length return LEN;
|
|
inbound return INBOUND;
|
|
outbound return OUTBOUND;
|
|
|
|
ifindex return IFINDEX;
|
|
|
|
vlan return VLAN;
|
|
mpls return MPLS;
|
|
pppoed return PPPOED;
|
|
pppoes return PPPOES;
|
|
geneve return GENEVE;
|
|
|
|
lane return LANE;
|
|
llc return LLC;
|
|
metac return METAC;
|
|
bcc return BCC;
|
|
oam return OAM;
|
|
oamf4 return OAMF4;
|
|
oamf4ec return OAMF4EC;
|
|
oamf4sc return OAMF4SC;
|
|
sc return SC;
|
|
ilmic return ILMIC;
|
|
vpi return VPI;
|
|
vci return VCI;
|
|
connectmsg return CONNECTMSG;
|
|
metaconnect return METACONNECT;
|
|
|
|
on|ifname return PF_IFNAME;
|
|
rset|ruleset return PF_RSET;
|
|
rnr|rulenum return PF_RNR;
|
|
srnr|subrulenum return PF_SRNR;
|
|
reason return PF_REASON;
|
|
action return PF_ACTION;
|
|
|
|
fisu return FISU;
|
|
lssu return LSSU;
|
|
lsu return LSSU;
|
|
msu return MSU;
|
|
hfisu return HFISU;
|
|
hlssu return HLSSU;
|
|
hmsu return HMSU;
|
|
sio return SIO;
|
|
opc return OPC;
|
|
dpc return DPC;
|
|
sls return SLS;
|
|
hsio return HSIO;
|
|
hopc return HOPC;
|
|
hdpc return HDPC;
|
|
hsls return HSLS;
|
|
|
|
[ \r\n\t] ;
|
|
[+\-*/%:\[\]!<>()&|\^=] return yytext[0];
|
|
">=" return GEQ;
|
|
"<=" return LEQ;
|
|
"!=" return NEQ;
|
|
"==" return '=';
|
|
"<<" return LSH;
|
|
">>" return RSH;
|
|
${B} { yylval->s = sdup(yyextra, yytext); return AID; }
|
|
{MAC} { yylval->s = sdup(yyextra, yytext); return EID; }
|
|
{N} { return stou(yytext, yylval, yyextra); }
|
|
({N}\.{N})|({N}\.{N}\.{N})|({N}\.{N}\.{N}\.{N}) {
|
|
yylval->s = sdup(yyextra, (char *)yytext); return HID; }
|
|
{V6} {
|
|
#ifdef INET6
|
|
struct addrinfo hints, *res;
|
|
memset(&hints, 0, sizeof(hints));
|
|
hints.ai_family = AF_INET6;
|
|
hints.ai_flags = AI_NUMERICHOST;
|
|
if (getaddrinfo(yytext, NULL, &hints, &res)) {
|
|
bpf_set_error(yyextra, "bogus IPv6 address %s", yytext);
|
|
yylval->s = NULL;
|
|
} else {
|
|
freeaddrinfo(res);
|
|
yylval->s = sdup(yyextra, (char *)yytext);
|
|
}
|
|
#else
|
|
bpf_set_error(yyextra, "IPv6 address %s not supported", yytext);
|
|
yylval->s = NULL;
|
|
#endif /*INET6*/
|
|
return HID6;
|
|
}
|
|
{B}:+({B}:+)+ { bpf_set_error(yyextra, "bogus ethernet address %s", yytext); yylval->s = NULL; return EID; }
|
|
icmptype { yylval->h = 0; return NUM; }
|
|
icmpcode { yylval->h = 1; return NUM; }
|
|
icmp-echoreply { yylval->h = 0; return NUM; }
|
|
icmp-unreach { yylval->h = 3; return NUM; }
|
|
icmp-sourcequench { yylval->h = 4; return NUM; }
|
|
icmp-redirect { yylval->h = 5; return NUM; }
|
|
icmp-echo { yylval->h = 8; return NUM; }
|
|
icmp-routeradvert { yylval->h = 9; return NUM; }
|
|
icmp-routersolicit { yylval->h = 10; return NUM; }
|
|
icmp-timxceed { yylval->h = 11; return NUM; }
|
|
icmp-paramprob { yylval->h = 12; return NUM; }
|
|
icmp-tstamp { yylval->h = 13; return NUM; }
|
|
icmp-tstampreply { yylval->h = 14; return NUM; }
|
|
icmp-ireq { yylval->h = 15; return NUM; }
|
|
icmp-ireqreply { yylval->h = 16; return NUM; }
|
|
icmp-maskreq { yylval->h = 17; return NUM; }
|
|
icmp-maskreply { yylval->h = 18; return NUM; }
|
|
|
|
icmp6type { yylval->h = 0; return NUM; }
|
|
icmp6code { yylval->h = 1; return NUM; }
|
|
|
|
icmp6-destinationunreach { yylval->h = 1; return NUM; }
|
|
icmp6-packettoobig { yylval->h = 2; return NUM; }
|
|
icmp6-timeexceeded { yylval->h = 3; return NUM; }
|
|
icmp6-parameterproblem { yylval->h = 4; return NUM; }
|
|
icmp6-echo { yylval->h = 128; return NUM; }
|
|
icmp6-echoreply { yylval->h = 129; return NUM; }
|
|
icmp6-multicastlistenerquery { yylval->h = 130; return NUM; }
|
|
icmp6-multicastlistenerreportv1 { yylval->h = 131; return NUM; }
|
|
icmp6-multicastlistenerdone { yylval->h = 132; return NUM; }
|
|
icmp6-routersolicit { yylval->h = 133; return NUM; }
|
|
icmp6-routeradvert { yylval->h = 134; return NUM; }
|
|
icmp6-neighborsolicit { yylval->h = 135; return NUM; }
|
|
icmp6-neighboradvert { yylval->h = 136; return NUM; }
|
|
icmp6-redirect { yylval->h = 137; return NUM; }
|
|
icmp6-routerrenum { yylval->h = 138; return NUM; }
|
|
icmp6-nodeinformationquery { yylval->h = 139; return NUM; }
|
|
icmp6-nodeinformationresponse { yylval->h = 140; return NUM; }
|
|
icmp6-ineighbordiscoverysolicit { yylval->h = 141; return NUM; }
|
|
icmp6-ineighbordiscoveryadvert { yylval->h = 142; return NUM; }
|
|
icmp6-multicastlistenerreportv2 { yylval->h = 143; return NUM; }
|
|
icmp6-homeagentdiscoveryrequest { yylval->h = 144; return NUM; }
|
|
icmp6-homeagentdiscoveryreply { yylval->h = 145; return NUM; }
|
|
icmp6-mobileprefixsolicit { yylval->h = 146; return NUM; }
|
|
icmp6-mobileprefixadvert { yylval->h = 147; return NUM; }
|
|
icmp6-certpathsolicit { yylval->h = 148; return NUM; }
|
|
icmp6-certpathadvert { yylval->h = 149; return NUM; }
|
|
icmp6-multicastrouteradvert { yylval->h = 151; return NUM; }
|
|
icmp6-multicastroutersolicit { yylval->h = 152; return NUM; }
|
|
icmp6-multicastrouterterm { yylval->h = 153; return NUM; }
|
|
|
|
tcpflags { yylval->h = 13; return NUM; }
|
|
tcp-fin { yylval->h = 0x01; return NUM; }
|
|
tcp-syn { yylval->h = 0x02; return NUM; }
|
|
tcp-rst { yylval->h = 0x04; return NUM; }
|
|
tcp-push { yylval->h = 0x08; return NUM; }
|
|
tcp-ack { yylval->h = 0x10; return NUM; }
|
|
tcp-urg { yylval->h = 0x20; return NUM; }
|
|
tcp-ece { yylval->h = 0x40; return NUM; }
|
|
tcp-cwr { yylval->h = 0x80; return NUM; }
|
|
[A-Za-z0-9]([-_.A-Za-z0-9]*[.A-Za-z0-9])? {
|
|
yylval->s = sdup(yyextra, (char *)yytext); return ID; }
|
|
"\\"[^ !()\n\t]+ { yylval->s = sdup(yyextra, (char *)yytext + 1); return ID; }
|
|
. { return LEX_ERROR; }
|
|
%%
|
|
|
|
/*
|
|
* Turn diagnostics back on, so we check the code that we've written.
|
|
*/
|
|
DIAG_ON_FLEX
|
|
|
|
/*
|
|
* Convert string to 32-bit unsigned integer. Just like atoi(), but checks for
|
|
* preceding 0x or 0 and uses hex or octal instead of decimal.
|
|
*
|
|
* On success, sets yylval->h to the value and returns NUM.
|
|
* On failure, sets the BPF error string and returns LEX_ERROR, to force
|
|
* the parse to stop.
|
|
*/
|
|
static int
|
|
stou(char *yytext_arg, YYSTYPE *yylval_arg, compiler_state_t *yyextra_arg)
|
|
{
|
|
bpf_u_int32 n = 0;
|
|
unsigned int digit;
|
|
char *s = yytext_arg;
|
|
|
|
/*
|
|
* yytext_arg is guaranteed either to be a string of decimal digits
|
|
* or 0[xX] followed by a string of hex digits.
|
|
*/
|
|
if (*s == '0') {
|
|
if (s[1] == 'x' || s[1] == 'X') {
|
|
/*
|
|
* Begins with 0x or 0X, so hex.
|
|
* Guaranteed to be all hex digits following the
|
|
* prefix, so anything that's not 0-9 or a-f is
|
|
* A-F.
|
|
*/
|
|
s += 2; /* skip the prefix */
|
|
while ((digit = *s++) != '\0') {
|
|
if (digit >= '0' && digit <= '9')
|
|
digit = digit - '0';
|
|
else if (digit >= 'a' && digit <= 'f')
|
|
digit = digit - 'a' + 10;
|
|
else
|
|
digit = digit - 'A' + 10;
|
|
|
|
/*
|
|
* Check for overflow.
|
|
*/
|
|
if (n > 0xFFFFFFFU) {
|
|
/*
|
|
* We have more than 28 bits of
|
|
* number, and are about to
|
|
* add 4 more; that won't fit
|
|
* in 32 bits.
|
|
*/
|
|
bpf_set_error(yyextra_arg,
|
|
"number %s overflows 32 bits",
|
|
yytext_arg);
|
|
return LEX_ERROR;
|
|
}
|
|
n = (n << 4) + digit;
|
|
}
|
|
} else {
|
|
/*
|
|
* Begins with 0, but not 0x or 0X, so octal.
|
|
* Guaranteed to be all *decimal* digits following
|
|
* the prefix, so we need to catch 8 and 9 and
|
|
* report an error.
|
|
*/
|
|
s += 1;
|
|
while ((digit = *s++) != '\0') {
|
|
if (digit >= '0' && digit <= '7')
|
|
digit = digit - '0';
|
|
else {
|
|
bpf_set_error(yyextra_arg,
|
|
"number %s contains non-octal digit",
|
|
yytext_arg);
|
|
return LEX_ERROR;
|
|
}
|
|
if (n > 03777777777U) {
|
|
/*
|
|
* We have more than 29 bits of
|
|
* number, and are about to add
|
|
* 3 more; that won't fit in
|
|
* 32 bits.
|
|
*/
|
|
bpf_set_error(yyextra_arg,
|
|
"number %s overflows 32 bits",
|
|
yytext_arg);
|
|
return LEX_ERROR;
|
|
}
|
|
n = (n << 3) + digit;
|
|
}
|
|
}
|
|
} else {
|
|
/*
|
|
* Decimal.
|
|
*/
|
|
while ((digit = *s++) != '\0') {
|
|
digit = digit - '0';
|
|
#define CUTOFF_DEC (0xFFFFFFFFU / 10U)
|
|
#define CUTLIM_DEC (0xFFFFFFFFU % 10U)
|
|
if (n > CUTOFF_DEC ||
|
|
(n == CUTOFF_DEC && digit > CUTLIM_DEC)) {
|
|
bpf_set_error(yyextra_arg,
|
|
"number %s overflows 32 bits",
|
|
yytext_arg);
|
|
return LEX_ERROR;
|
|
}
|
|
n = (n * 10) + digit;
|
|
}
|
|
}
|
|
|
|
yylval_arg->h = n;
|
|
return NUM;
|
|
}
|