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teach navdump to hunt for magic values in case of corrupted messages

pull/125/head
bert hubert 2020-07-03 21:37:29 +02:00
parent 92364b2ec6
commit afbd3a6422
1 changed files with 17 additions and 1 deletions
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18
navdump.cc
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@ -310,7 +310,23 @@ try
// I am so sorry
if(bert[0]!='b' || bert[1]!='e' || bert[2] !='r' || bert[3]!='t') {
cerr<<"Bad magic"<<endl;
cerr<<"Bad magic: "<<makeHexDump(string(bert, 4))<<endl;
int res;
for(int s=0;;++s) {
cerr<<"Skipping character hunting for good magic.. "<<s<<endl;
bert[0] = bert[1];
bert[1] = bert[2];
bert[2] = bert[3];
res = readn2(0, bert + 3, 1);
if(res != 1)
break;
if(bert[0]=='b' && bert[1]=='e' && bert[2] =='r' && bert[3]=='t')
break;
}
if(res != 1) {
cerr<<"EOF2, res = "<<res<<endl;
break;
}
}
uint16_t len;