dark/zerotiertspu
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Full and clearer implementation of GitHub issue #588

Browse source
This commit is contained in:
Adam Ierymenko 2017-10-24 13:33:53 -07:00
parent b92ef67e56
commit 395d8b3139
4 changed files with 77 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

29
node/Network.cpp
View file

@ -493,6 +493,35 @@ static _doZtFilterResult _doZtFilter(
}
}
} break;
case ZT_NETWORK_RULE_MATCH_INTEGER_RANGE: {
uint64_t integer = 0;
const unsigned int bits = (rules[rn].v.intRange.format & 63) + 1;
const unsigned int bytes = ((bits + 8 - 1) / 8); // integer ceiling of division by 8
if ((rules[rn].v.intRange.format & 0x80) == 0) {
// Big-endian
unsigned int idx = rules[rn].v.intRange.idx + (8 - bytes);
const unsigned int eof = idx + bytes;
if (eof <= frameLen) {
while (idx < eof) {
integer <<= 8;
integer |= frameData[idx++];
}
}
integer &= 0xffffffffffffffffULL >> (64 - bits);
} else {
// Little-endian
unsigned int idx = rules[rn].v.intRange.idx;
const unsigned int eof = idx + bytes;
if (eof <= frameLen) {
while (idx < eof) {
integer >>= 8;
integer |= ((uint64_t)frameData[idx++]) << 56;
}
}
integer >>= (64 - bits);
}
thisRuleMatches = (uint8_t)((integer >= rules[rn].v.intRange.start)&&(integer <= (rules[rn].v.intRange.start + (uint64_t)rules[rn].v.intRange.end)));
} break;
// The result of an unsupported MATCH is configurable at the network
// level via a flag.