gdbsupport/netstuff.h

   1 /* Operations on network stuff.
   2    Copyright (C) 2018-2020 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   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 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef COMMON_NETSTUFF_H
  20 #define COMMON_NETSTUFF_H
  21
  22 #include <string>
  23
  24 /* Like NI_MAXHOST/NI_MAXSERV, but enough for numeric forms.  */
  25 #define GDB_NI_MAX_ADDR 64
  26 #define GDB_NI_MAX_PORT 16
  27
  28 /* Helper class to guarantee that we always call 'freeaddrinfo'.  */
  29
  30 class scoped_free_addrinfo
  31 {
  32 public:
  33   /* Default constructor.  */
  34   explicit scoped_free_addrinfo (struct addrinfo *ainfo)
  35     : m_res (ainfo)
  36   {
  37   }
  38
  39   /* Destructor responsible for free'ing M_RES by calling
  40      'freeaddrinfo'.  */
  41   ~scoped_free_addrinfo ();
  42
  43   DISABLE_COPY_AND_ASSIGN (scoped_free_addrinfo);
  44
  45 private:
  46   /* The addrinfo resource.  */
  47   struct addrinfo *m_res;
  48 };
  49
  50 /* The struct we return after parsing the connection spec.  */
  51
  52 struct parsed_connection_spec
  53 {
  54   /* The hostname.  */
  55   std::string host_str;
  56
  57   /* The port, if any.  */
  58   std::string port_str;
  59 };
  60
  61
  62 /* Parse SPEC (which is a string in the form of "ADDR:PORT") and
  63    return a 'parsed_connection_spec' structure with the proper fields
  64    filled in.  Also adjust HINT accordingly.  */
  65 extern parsed_connection_spec
  66   parse_connection_spec_without_prefix (std::string spec,
  67                                         struct addrinfo *hint);
  68
  69 /* Parse SPEC (which is a string in the form of
  70    "[tcp[6]:|udp[6]:]ADDR:PORT") and return a 'parsed_connection_spec'
  71    structure with the proper fields filled in.  Also adjust HINT
  72    accordingly.  */
  73 extern parsed_connection_spec parse_connection_spec (const char *spec,
  74                                                      struct addrinfo *hint);
  75
  76 #endif /* COMMON_NETSTUFF_H */