190 lines
4.7 KiB
C++
190 lines
4.7 KiB
C++
/*
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Copyright (c) 2014, Arvid Norberg
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "libtorrent/session.hpp"
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#include "libtorrent/escape_string.hpp" // for from_hex
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#include "libtorrent/alert_types.hpp"
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#include "libtorrent/bencode.hpp" // for bencode()
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#include <stdlib.h>
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using namespace libtorrent;
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void usage()
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{
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fprintf(stderr,
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"USAGE:\ndht <command> <arg>\n\nCOMMANDS:\n"
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"get <hash> - retrieves and prints out the immutable\n"
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" item stored under hash.\n"
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"put <string> - puts the specified string as an immutable\n"
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" item onto the DHT. The resulting target hash\n"
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);
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exit(1);
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}
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std::auto_ptr<alert> wait_for_alert(session& s, int alert_type)
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{
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std::auto_ptr<alert> ret;
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bool found = false;
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while (!found)
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{
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s.wait_for_alert(seconds(5));
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std::deque<alert*> alerts;
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s.pop_alerts(&alerts);
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for (std::deque<alert*>::iterator i = alerts.begin()
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, end(alerts.end()); i != end; ++i)
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{
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if ((*i)->type() != alert_type)
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{
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static int spinner = 0;
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static const char anim[] = {'-', '\\', '|', '/'};
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printf("\r%c", anim[spinner]);
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fflush(stdout);
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spinner = (spinner + 1) & 3;
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//print some alerts?
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delete *i;
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continue;
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}
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ret = std::auto_ptr<alert>(*i);
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found = true;
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}
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}
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printf("\n");
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return ret;
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}
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int main(int argc, char* argv[])
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{
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session s;
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s.set_alert_mask(0xffffffff);
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s.add_dht_router(std::pair<std::string, int>("router.utorrent.com", 6881));
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FILE* f = fopen(".dht", "rb");
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if (f != NULL)
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{
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fseek(f, 0, SEEK_END);
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int size = ftell(f);
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fseek(f, 0, SEEK_SET);
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if (size > 0)
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{
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std::vector<char> state;
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state.resize(size);
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fread(&state[0], 1, state.size(), f);
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lazy_entry e;
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error_code ec;
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lazy_bdecode(&state[0], &state[0] + state.size(), e, ec);
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if (ec)
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fprintf(stderr, "failed to parse .dht file: (%d) %s\n"
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, ec.value(), ec.message().c_str());
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else
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s.load_state(e);
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}
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fclose(f);
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}
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printf("bootstrapping\n");
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wait_for_alert(s, dht_bootstrap_alert::alert_type);
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// skip pointer to self
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++argv;
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--argc;
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if (argc < 1) usage();
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if (strcmp(argv[0], "get") == 0)
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{
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++argv;
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--argc;
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if (argc < 1) usage();
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if (strlen(argv[0]) != 40)
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{
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fprintf(stderr, "the hash is expected to be 40 hex characters\n");
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usage();
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}
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sha1_hash target;
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from_hex(argv[0], 40, (char*)&target[0]);
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s.dht_get_item(target);
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printf("GET %s\n", to_hex(target.to_string()).c_str());
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std::auto_ptr<alert> a = wait_for_alert(s, dht_immutable_item_alert::alert_type);
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dht_immutable_item_alert* item = alert_cast<dht_immutable_item_alert>(a.get());
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entry data;
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if (item)
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data.swap(item->item);
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printf("%s", data.to_string().c_str());
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}
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else if (strcmp(argv[0], "put") == 0)
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{
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++argv;
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--argc;
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if (argc < 1) usage();
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entry data;
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data = std::string(argv[0]);
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sha1_hash target = s.dht_put_item(data);
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printf("PUT %s\n", to_hex(target.to_string()).c_str());
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wait_for_alert(s, dht_put_alert::alert_type);
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}
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else
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{
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usage();
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}
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entry e;
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s.save_state(e, session::save_dht_state);
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std::vector<char> state;
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bencode(std::back_inserter(state), e);
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f = fopen(".dht", "wb+");
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if (f == NULL)
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{
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fprintf(stderr, "failed to open file .dht for writing");
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return 1;
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}
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fwrite(&state[0], 1, state.size(), f);
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fclose(f);
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}
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