The Battle for Wesnoth  1.17.0-dev
parse_network_address.cpp
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1 /*
2  Copyright (C) 2019 - 2021
3  by Sergey Popov <loonycyborg@gmail.com>
4  Part of the Battle for Wesnoth Project https://www.wesnoth.org/
5 
6  This program is free software; you can redistribute it and/or modify
7  it under the terms of the GNU General Public License as published by
8  the Free Software Foundation; either version 2 of the License, or
9  (at your option) any later version.
10  This program is distributed in the hope that it will be useful,
11  but WITHOUT ANY WARRANTY.
12 
13  See the COPYING file for more details.
14 */
15 
17 
18 #include <regex>
19 #include <string>
20 
21 std::pair<std::string, std::string> parse_network_address(const std::string& address, const std::string& default_port)
22 {
23  const char* address_re = "\\[([[:xdigit:]:]*)\\](:([[:alnum:]]*))?|([[:alnum:]-_\\.]{1,253})(:([[:alnum:]]*))?";
24 
25  std::smatch m;
26  std::regex_match(address, m, std::regex(address_re));
27 
28  if(!m[1].str().empty()) {
29  return { m[1], m[3].str().empty() ? default_port : m[3] };
30  }
31  if(!m[4].str().empty()) {
32  return { m[4], m[6].str().empty() ? default_port : m[6] };
33  }
34 
35  throw std::runtime_error("invalid address");
36 }
std::pair< std::string, std::string > parse_network_address(const std::string &address, const std::string &default_port)
Parse a host:port style network address, supporting [] notation for ipv6 addresses.