156 lines
4.0 KiB
C
156 lines
4.0 KiB
C
/* Operations on network stuff.
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Copyright (C) 2018 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "common-defs.h"
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#include "netstuff.h"
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#include <algorithm>
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#ifdef USE_WIN32API
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#include <winsock2.h>
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#include <wspiapi.h>
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#else
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <sys/socket.h>
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#include <netinet/tcp.h>
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#endif
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/* See common/netstuff.h. */
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scoped_free_addrinfo::~scoped_free_addrinfo ()
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{
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freeaddrinfo (m_res);
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}
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/* See common/netstuff.h. */
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parsed_connection_spec
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parse_connection_spec_without_prefix (std::string spec, struct addrinfo *hint)
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{
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parsed_connection_spec ret;
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size_t last_colon_pos = 0;
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/* We're dealing with IPv6 if:
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- ai_family is AF_INET6, or
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- ai_family is not AF_INET, and
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- spec[0] is '[', or
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- the number of ':' on spec is greater than 1. */
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bool is_ipv6 = (hint->ai_family == AF_INET6
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|| (hint->ai_family != AF_INET
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&& (spec[0] == '['
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|| std::count (spec.begin (),
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spec.end (), ':') > 1)));
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if (is_ipv6)
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{
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if (spec[0] == '[')
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{
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/* IPv6 addresses can be written as '[ADDR]:PORT', and we
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support this notation. */
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size_t close_bracket_pos = spec.find_first_of (']');
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if (close_bracket_pos == std::string::npos)
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error (_("Missing close bracket in hostname '%s'"),
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spec.c_str ());
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hint->ai_family = AF_INET6;
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const char c = spec[close_bracket_pos + 1];
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if (c == '\0')
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last_colon_pos = std::string::npos;
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else if (c != ':')
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error (_("Invalid cruft after close bracket in '%s'"),
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spec.c_str ());
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/* Erase both '[' and ']'. */
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spec.erase (0, 1);
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spec.erase (close_bracket_pos - 1, 1);
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}
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else if (spec.find_first_of (']') != std::string::npos)
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error (_("Missing open bracket in hostname '%s'"),
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spec.c_str ());
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}
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if (last_colon_pos == 0)
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last_colon_pos = spec.find_last_of (':');
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/* The length of the hostname part. */
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size_t host_len;
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if (last_colon_pos != std::string::npos)
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{
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/* The user has provided a port. */
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host_len = last_colon_pos;
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ret.port_str = spec.substr (last_colon_pos + 1);
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}
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else
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host_len = spec.size ();
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ret.host_str = spec.substr (0, host_len);
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/* Default hostname is localhost. */
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if (ret.host_str.empty ())
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ret.host_str = "localhost";
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return ret;
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}
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/* See common/netstuff.h. */
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parsed_connection_spec
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parse_connection_spec (const char *spec, struct addrinfo *hint)
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{
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/* Struct to hold the association between valid prefixes, their
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family and socktype. */
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struct host_prefix
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{
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/* The prefix. */
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const char *prefix;
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/* The 'ai_family'. */
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int family;
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/* The 'ai_socktype'. */
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int socktype;
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};
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static const struct host_prefix prefixes[] =
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{
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{ "udp:", AF_UNSPEC, SOCK_DGRAM },
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{ "tcp:", AF_UNSPEC, SOCK_STREAM },
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{ "udp4:", AF_INET, SOCK_DGRAM },
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{ "tcp4:", AF_INET, SOCK_STREAM },
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{ "udp6:", AF_INET6, SOCK_DGRAM },
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{ "tcp6:", AF_INET6, SOCK_STREAM },
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};
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for (const host_prefix prefix : prefixes)
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if (startswith (spec, prefix.prefix))
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{
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spec += strlen (prefix.prefix);
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hint->ai_family = prefix.family;
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hint->ai_socktype = prefix.socktype;
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hint->ai_protocol
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= hint->ai_socktype == SOCK_DGRAM ? IPPROTO_UDP : IPPROTO_TCP;
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break;
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}
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return parse_connection_spec_without_prefix (spec, hint);
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}
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