1 /* Operations on network stuff.
2 Copyright (C) 2018-2019 Free Software Foundation, Inc.
4 This file is part of GDB.
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.
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.
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/>. */
19 #include "common-defs.h"
26 #include <netinet/in.h>
27 #include <arpa/inet.h>
29 #include <sys/socket.h>
30 #include <netinet/tcp.h>
33 /* See gdbsupport/netstuff.h. */
35 scoped_free_addrinfo::~scoped_free_addrinfo ()
40 /* See gdbsupport/netstuff.h. */
42 parsed_connection_spec
43 parse_connection_spec_without_prefix (std::string spec, struct addrinfo *hint)
45 parsed_connection_spec ret;
46 size_t last_colon_pos = 0;
47 /* We're dealing with IPv6 if:
49 - ai_family is AF_INET6, or
50 - ai_family is not AF_INET, and
52 - the number of ':' on spec is greater than 1. */
53 bool is_ipv6 = (hint->ai_family == AF_INET6
54 || (hint->ai_family != AF_INET
56 || std::count (spec.begin (),
57 spec.end (), ':') > 1)));
63 /* IPv6 addresses can be written as '[ADDR]:PORT', and we
64 support this notation. */
65 size_t close_bracket_pos = spec.find_first_of (']');
67 if (close_bracket_pos == std::string::npos)
68 error (_("Missing close bracket in hostname '%s'"),
71 hint->ai_family = AF_INET6;
73 const char c = spec[close_bracket_pos + 1];
76 last_colon_pos = std::string::npos;
78 error (_("Invalid cruft after close bracket in '%s'"),
81 /* Erase both '[' and ']'. */
83 spec.erase (close_bracket_pos - 1, 1);
85 else if (spec.find_first_of (']') != std::string::npos)
86 error (_("Missing open bracket in hostname '%s'"),
90 if (last_colon_pos == 0)
91 last_colon_pos = spec.find_last_of (':');
93 /* The length of the hostname part. */
96 if (last_colon_pos != std::string::npos)
98 /* The user has provided a port. */
99 host_len = last_colon_pos;
100 ret.port_str = spec.substr (last_colon_pos + 1);
103 host_len = spec.size ();
105 ret.host_str = spec.substr (0, host_len);
107 /* Default hostname is localhost. */
108 if (ret.host_str.empty ())
109 ret.host_str = "localhost";
114 /* See gdbsupport/netstuff.h. */
116 parsed_connection_spec
117 parse_connection_spec (const char *spec, struct addrinfo *hint)
119 /* Struct to hold the association between valid prefixes, their
120 family and socktype. */
126 /* The 'ai_family'. */
129 /* The 'ai_socktype'. */
132 static const struct host_prefix prefixes[] =
134 { "udp:", AF_UNSPEC, SOCK_DGRAM },
135 { "tcp:", AF_UNSPEC, SOCK_STREAM },
136 { "udp4:", AF_INET, SOCK_DGRAM },
137 { "tcp4:", AF_INET, SOCK_STREAM },
138 { "udp6:", AF_INET6, SOCK_DGRAM },
139 { "tcp6:", AF_INET6, SOCK_STREAM },
142 for (const host_prefix prefix : prefixes)
143 if (startswith (spec, prefix.prefix))
145 spec += strlen (prefix.prefix);
146 hint->ai_family = prefix.family;
147 hint->ai_socktype = prefix.socktype;
149 = hint->ai_socktype == SOCK_DGRAM ? IPPROTO_UDP : IPPROTO_TCP;
153 return parse_connection_spec_without_prefix (spec, hint);