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12471842 PL |
1 | /* |
2 | * This file is part of PowerDNS or dnsdist. | |
3 | * Copyright -- PowerDNS.COM B.V. and its contributors | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of version 2 of the GNU General Public License as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * In addition, for the avoidance of any doubt, permission is granted to | |
10 | * link this program with OpenSSL and to (re)distribute the binaries | |
11 | * produced as the result of such linking. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
21 | */ | |
fba1e944 | 22 | #ifdef HAVE_CONFIG_H |
23 | #include "config.h" | |
24 | #endif | |
25 | #include "iputils.hh" | |
26 | #include "sstuff.hh" | |
27 | #include "statbag.hh" | |
28 | ||
910fa841 | 29 | /* This tool REALLY wants to be rewritten in Python, by ahu does not speak it very well. |
30 | What it does is provide answers to queries from the Lua generic UDP Question/Answer | |
31 | stuff in kv-example-script.lua */ | |
32 | ||
fba1e944 | 33 | StatBag S; |
34 | ||
35 | int main(int argc, char** argv) | |
36 | try | |
37 | { | |
38 | if(argc != 3) { | |
910fa841 | 39 | cerr<<"Syntax: kvresp local-address local-port"<<endl; |
fba1e944 | 40 | exit(EXIT_FAILURE); |
41 | } | |
42 | ||
43 | ComboAddress local(argv[1], atoi(argv[2])); | |
44 | Socket s(local.sin4.sin_family, SOCK_DGRAM); | |
45 | ||
46 | s.bind(local); | |
47 | cout<<"Bound to "<<local.toStringWithPort()<<endl; | |
48 | ||
49 | char buffer[1500]; | |
50 | ||
51 | int len; | |
52 | ComboAddress rem=local; | |
53 | socklen_t socklen = rem.getSocklen(); | |
54 | for(;;) { | |
55 | len=recvfrom(s.getHandle(), buffer, sizeof(buffer), 0, (struct sockaddr*)&rem, &socklen); | |
56 | if(len < 0) | |
57 | unixDie("recvfrom"); | |
58 | string query(buffer, len); | |
59 | cout<<"Had packet: "<<query<<endl; | |
60 | vector<string> parts; | |
61 | stringtok(parts, query); | |
62 | if(parts.size()<2) | |
63 | continue; | |
64 | string response; | |
65 | if(parts[0]=="DOMAIN") | |
66 | response= (parts[1].find("xxx") != string::npos) ? "1" : "0"; | |
67 | else if(parts[0]=="IP") | |
68 | response= (parts[1]=="127.0.0.1") ? "1" : "0"; | |
69 | else | |
70 | response= "???"; | |
71 | ||
72 | cout<<"Our reply: "<<response<<endl; | |
73 | if(sendto(s.getHandle(), response.c_str(), response.length(), 0, (struct sockaddr*)&rem, socklen) < 0) | |
74 | unixDie("sendto"); | |
75 | } | |
76 | } | |
77 | catch(std::exception& e) | |
78 | { | |
79 | cerr<<"Fatal error: "<<e.what()<<endl; | |
80 | exit(EXIT_FAILURE); | |
81 | } |