lokinet/llarp/dns/name.hpp

#pragma once

#include <llarp/net/net_int.hpp>
#include <llarp/util/buffer.hpp>

#include <optional>
#include <string>

namespace llarp::dns
{
  /// decode name from buffer; return nullopt on failure
  std::optional<std::string>
  DecodeName(llarp_buffer_t* buf, bool trimTrailingDot = false);

  /// encode name to buffer
  bool
  EncodeNameTo(llarp_buffer_t* buf, std::string_view name);

  std::optional<huint128_t>
  DecodePTR(std::string_view name);

  bool
  NameIsReserved(std::string_view name);

}  // namespace llarp::dns
standardize include format and pragma once All #ifndef guards on headers have been removed, I think, in favor of #pragma once Headers are now included as `#include "filename"` if the included file resides in the same directory as the file including it, or any subdirectory therein. Otherwise they are included as `#include <project/top/dir/relative/path/filename>` The above does not include system/os headers. 2021-03-09 22:24:35 +00:00			`#pragma once`
add dnslib 2018-12-03 22:22:59 +00:00
standardize include format and pragma once All #ifndef guards on headers have been removed, I think, in favor of #pragma once Headers are now included as `#include "filename"` if the included file resides in the same directory as the file including it, or any subdirectory therein. Otherwise they are included as `#include <project/top/dir/relative/path/filename>` The above does not include system/os headers. 2021-03-09 22:24:35 +00:00			`#include <llarp/net/net_int.hpp>`
			`#include <llarp/util/buffer.hpp>`
Clang format include sorting + CMake - includes are now sorted in consistent, logical order; first step in an attempt to fix the tomfoolery (no relation to Tom) brought in by include-what-you-use - shuffled around some cmake linking to simplify dependency graph - superfluous files removed 2023-10-24 13:18:03 +00:00
DNS message parsing fixes and cleanup Fixes: - tighten reserved name detection to not match fooloki.loki, but instead only match "foo.loki.loki" and "loki.loki" (and similar for reserved name "snode.loki"). - IPv6 PTR parsing was completely broken. - Added tests for the above two issues. Cleanups: - Eliminate llarp::dns::Name_t typedef for std::string - Use optional return instead of bool + output param - Use string_views; we were doing a lot of string substr's during parsing, each of which allocates a new string. - Use fmt instead of stringstream - Simplify IPv4 PTR parsing 2022-07-18 20:05:39 +00:00			`#include <optional>`
Clang format include sorting + CMake - includes are now sorted in consistent, logical order; first step in an attempt to fix the tomfoolery (no relation to Tom) brought in by include-what-you-use - shuffled around some cmake linking to simplify dependency graph - superfluous files removed 2023-10-24 13:18:03 +00:00			`#include <string>`
add dnslib 2018-12-03 22:22:59 +00:00
Review commit 2023-10-19 21:59:57 +00:00			`namespace llarp::dns`
add dnslib 2018-12-03 22:22:59 +00:00			`{`
Review commit 2023-10-19 21:59:57 +00:00			`/// decode name from buffer; return nullopt on failure`
			`std::optional<std::string>`
			`DecodeName(llarp_buffer_t* buf, bool trimTrailingDot = false);`
add dnslib 2018-12-03 22:22:59 +00:00
Review commit 2023-10-19 21:59:57 +00:00			`/// encode name to buffer`
			`bool`
			`EncodeNameTo(llarp_buffer_t* buf, std::string_view name);`
add dnslib 2018-12-03 22:22:59 +00:00
Review commit 2023-10-19 21:59:57 +00:00			`std::optional<huint128_t>`
			`DecodePTR(std::string_view name);`
LNS (#1342) * initial relay side lns * fix typo * add reserved names and refactor test for dns * lns name decryption * all wired up (allegedly) * refact to use service::EncryptedName for LNS responses to include nonce with ciphertext * fully rwemove tag_lookup_job * replace lns cache with DecayingHashTable * check for lns name validity against the following rules: * not localhost.loki, loki.loki, or snode.loki * if it contains no dash then max 32 characters long, not including the .loki tld (and also assuming a leading subdomain has been stripped) * These are from general DNS requirements, and also enforced in registrations: * Must be all [A-Za-z0-9-]. (A-Z will be lower-cased by the RPC call). * cannot start or end with a - * max 63 characters long if it does contain a dash * cannot contain -- in the third and fourth characters unless it starts with xn-- * handle timeout in name lookup job by calling the right handler with std::nullopt 2020-09-17 19:18:08 +00:00
Review commit 2023-10-19 21:59:57 +00:00			`bool`
			`NameIsReserved(std::string_view name);`
add dnslib 2018-12-03 22:22:59 +00:00
Review commit 2023-10-19 21:59:57 +00:00			`} // namespace llarp::dns`