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rework r0ket::get_data() to deal with timeouts

This commit is contained in:
Stefan `Sec` Zehl 2012-05-06 23:42:28 +02:00
parent 52808668d3
commit 24bb1b5508
1 changed files with 38 additions and 29 deletions
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65
tools/mesh/lib/r0ket.pm
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@ -102,32 +102,14 @@ our $buffer;
our $firstpkt=1; our $firstpkt=1;
sub get_data{ sub get_data{
my $filter=shift||0; my $filter=shift||0;
sub _get_bytes{
my $rr;
sysread($bridge,$rr,1024);
if(length($rr)<=1){
select(undef,undef,undef,0.05);
};
$buffer.=$rr;
# print "recv: ",unpack("H*",$rr),"\n";
};
my $cnt=0; my $rin=''; # Select vector
my ($rout,$eout);
vec($rin,fileno($bridge),1) = 1;
while(1){ while(1){
if(length($buffer)<2){
_get_bytes(); if ($buffer =~ s/^\\(\d)(.*?)\\0//s){
}elsif($buffer !~ /^\\[1-9]/){
if($buffer =~ /[^\\]\\[1-9]/){
$buffer =~ s/^(.*?[^\\])(\\[1-9])/\2/s;
}else{
$buffer = s/(.*)//s;
};
if($firstpkt){
$firstpkt--;
}else{
print STDERR "Unparseable stuff: <",sprint($1),">\n" if(!$quiet);
};
}elsif ($buffer =~ s/^\\(\d)(.*?)\\0//s){
my ($type,$str)=($1,$2); my ($type,$str)=($1,$2);
$str=~s/\\\\/\\/g; # dequote $str=~s/\\\\/\\/g; # dequote
# print STDERR "ret:pkt[$type]=",(sprint $str),"\n"; # print STDERR "ret:pkt[$type]=",(sprint $str),"\n";
@ -136,14 +118,41 @@ sub get_data{
}elsif($filter==$type){ }elsif($filter==$type){
return $str; return $str;
}; };
next; # If rejected, look for next packet.
};
if(length($buffer)>1){
if($buffer =~ /[^\\]\\[1-9]/){
$buffer =~ s/^(.*?[^\\])(\\[1-9])/\2/s;
if($firstpkt){
$firstpkt--;
}else{ }else{
_get_bytes(); print STDERR "Unparseable stuff: <",sprint($1),">\n" if(!$quiet);
}; };
if(++$cnt%100 == 0){ redo; # Try parsing the rest.
if(!$quiet){
print STDERR "No packets for 5 seconds?\n";
}; };
}; };
my ($nfound,$timeleft) =
select($rout=$rin, undef, $eout=$rin, 1);
if($nfound==0){
if($filter==0){
return (0,'');
}else{
print STDERR "No packets for 1 second...\n";
};
};
if($eout eq $rin){
die "Error on bridge socket: $!\n";
};
if($rout eq $rin){
my $rr;
sysread($bridge,$rr,1024);
# print "len=",length($rr),"\n";
$buffer.=$rr;
};
# print "recv: ",unpack("H*",$rr),"\n";
}; };
}; };