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Fix parsing XOR-MAPPED-ADDRESS if the optional comprehension bit is set

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This commit is contained in:
Cameron Gutman
2019-01-22 17:35:53 -08:00
parent 12eebe0039
commit dc21e28e1f
1 changed files with 2 additions and 1 deletions
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3
src/SimpleStun.c
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@@ -133,7 +133,8 @@ int LiFindExternalAddressIP4(const char* stunServer, unsigned short stunPort, un
Limelog("STUN attribute out of bounds: %d\n", htons(attribute->length));
return -5;
}
else if (htons(attribute->type) != STUN_ATTRIBUTE_XOR_MAPPED_ADDRESS) {
// Mask off the comprehension bit
else if ((htons(attribute->type) & 0x7FFF) != STUN_ATTRIBUTE_XOR_MAPPED_ADDRESS) {
// Continue searching if this wasn't our address
bytesRead -= sizeof(*attribute) + htons(attribute->length);
attribute = (PSTUN_ATTRIBUTE_HEADER)(((char*)attribute) + sizeof(*attribute) + htons(attribute->length));