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https://github.com/oxen-io/lokinet.git
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111 lines
2.6 KiB
C++
111 lines
2.6 KiB
C++
#include <llarp/router_contact.h>
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#include <llarp/link_message.hpp>
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#include <llarp/messages/dht_immediate.hpp>
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#include <llarp/messages/discard.hpp>
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#include <llarp/messages/link_intro.hpp>
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#include <llarp/messages/relay_commit.hpp>
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#include "buffer.hpp"
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#include "logger.hpp"
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#include "router.hpp"
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namespace llarp
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{
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ILinkMessage::ILinkMessage(const RouterID& id) : remote(id)
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{
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}
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InboundMessageParser::InboundMessageParser(llarp_router* _router)
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: router(_router)
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{
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reader.user = this;
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reader.on_key = &OnKey;
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}
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bool
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InboundMessageParser::OnKey(dict_reader* r, llarp_buffer_t* key)
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{
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InboundMessageParser* handler =
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static_cast< InboundMessageParser* >(r->user);
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llarp_buffer_t strbuf;
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// we are reading the first key
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if(handler->firstkey)
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{
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// check for empty dict
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if(!key)
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return false;
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// we are expecting the first key to be 'a'
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if(!llarp_buffer_eq(*key, "a"))
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{
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llarp::Warn(__FILE__, "message has no message type");
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return false;
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}
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if(!bencode_read_string(r->buffer, &strbuf))
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{
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llarp::Warn(__FILE__, "could not read value of message type");
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return false;
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}
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// bad key size
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if(strbuf.sz != 1)
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{
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llarp::Warn(__FILE__, "bad mesage type size: ", strbuf.sz);
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return false;
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}
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switch(*strbuf.cur)
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{
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case 'i':
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handler->msg = new LinkIntroMessage(
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handler->from->get_remote_router(handler->from));
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break;
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case 'm':
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handler->msg = new DHTImmeidateMessage(handler->GetCurrentFrom());
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break;
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case 'c':
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handler->msg = new LR_CommitMessage(handler->GetCurrentFrom());
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break;
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case 'z':
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handler->msg = new DiscardMessage(handler->GetCurrentFrom());
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break;
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default:
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return false;
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}
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handler->firstkey = false;
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return handler->msg != nullptr;
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}
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// check for last element
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if(!key)
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return handler->MessageDone();
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return handler->msg->DecodeKey(*key, r->buffer);
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}
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RouterID
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InboundMessageParser::GetCurrentFrom()
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{
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auto rc = from->get_remote_router(from);
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return rc->pubkey;
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}
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bool
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InboundMessageParser::MessageDone()
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{
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bool result = false;
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if(msg)
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{
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result = msg->HandleMessage(router);
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delete msg;
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msg = nullptr;
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}
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return result;
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}
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bool
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InboundMessageParser::ProcessFrom(llarp_link_session* src, llarp_buffer_t buf)
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{
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from = src;
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firstkey = true;
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return bencode_read_dict(&buf, &reader);
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}
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}
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