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"
27 #include <netinet/in.h>
28 #include <arpa/inet.h>
30 #include <sys/socket.h>
31 #include <netinet/tcp.h>
34 /* See common/netstuff.h. */
36 scoped_free_addrinfo::~scoped_free_addrinfo ()
41 /* See common/netstuff.h. */
43 parsed_connection_spec
44 parse_connection_spec_without_prefix (std::string spec
, struct addrinfo
*hint
)
46 parsed_connection_spec ret
;
47 size_t last_colon_pos
= 0;
48 /* We're dealing with IPv6 if:
50 - ai_family is AF_INET6, or
51 - ai_family is not AF_INET, and
53 - the number of ':' on spec is greater than 1. */
54 bool is_ipv6
= (hint
->ai_family
== AF_INET6
55 || (hint
->ai_family
!= AF_INET
57 || std::count (spec
.begin (),
58 spec
.end (), ':') > 1)));
64 /* IPv6 addresses can be written as '[ADDR]:PORT', and we
65 support this notation. */
66 size_t close_bracket_pos
= spec
.find_first_of (']');
68 if (close_bracket_pos
== std::string::npos
)
69 error (_("Missing close bracket in hostname '%s'"),
72 hint
->ai_family
= AF_INET6
;
74 const char c
= spec
[close_bracket_pos
+ 1];
77 last_colon_pos
= std::string::npos
;
79 error (_("Invalid cruft after close bracket in '%s'"),
82 /* Erase both '[' and ']'. */
84 spec
.erase (close_bracket_pos
- 1, 1);
86 else if (spec
.find_first_of (']') != std::string::npos
)
87 error (_("Missing open bracket in hostname '%s'"),
91 if (last_colon_pos
== 0)
92 last_colon_pos
= spec
.find_last_of (':');
94 /* The length of the hostname part. */
97 if (last_colon_pos
!= std::string::npos
)
99 /* The user has provided a port. */
100 host_len
= last_colon_pos
;
101 ret
.port_str
= spec
.substr (last_colon_pos
+ 1);
104 host_len
= spec
.size ();
106 ret
.host_str
= spec
.substr (0, host_len
);
108 /* Default hostname is localhost. */
109 if (ret
.host_str
.empty ())
110 ret
.host_str
= "localhost";
115 /* See common/netstuff.h. */
117 parsed_connection_spec
118 parse_connection_spec (const char *spec
, struct addrinfo
*hint
)
120 /* Struct to hold the association between valid prefixes, their
121 family and socktype. */
127 /* The 'ai_family'. */
130 /* The 'ai_socktype'. */
133 static const struct host_prefix prefixes
[] =
135 { "udp:", AF_UNSPEC
, SOCK_DGRAM
},
136 { "tcp:", AF_UNSPEC
, SOCK_STREAM
},
137 { "udp4:", AF_INET
, SOCK_DGRAM
},
138 { "tcp4:", AF_INET
, SOCK_STREAM
},
139 { "udp6:", AF_INET6
, SOCK_DGRAM
},
140 { "tcp6:", AF_INET6
, SOCK_STREAM
},
143 for (const host_prefix prefix
: prefixes
)
144 if (startswith (spec
, prefix
.prefix
))
146 spec
+= strlen (prefix
.prefix
);
147 hint
->ai_family
= prefix
.family
;
148 hint
->ai_socktype
= prefix
.socktype
;
150 = hint
->ai_socktype
== SOCK_DGRAM
? IPPROTO_UDP
: IPPROTO_TCP
;
154 return parse_connection_spec_without_prefix (spec
, hint
);