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74 lines
2.6 KiB
C++
74 lines
2.6 KiB
C++
/**
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* Copyright (c) 2021, Timothy Stack
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of Timothy Stack nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "network.tcp.hh"
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#include <netdb.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include "config.h"
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#include "fmt/format.h"
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namespace network {
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namespace tcp {
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Result<auto_fd, std::string>
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connect(const char* hostname, const char* servname)
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{
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struct addrinfo hints, *ai;
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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auto rc = getaddrinfo(hostname, servname, &hints, &ai);
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if (rc != 0) {
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return Err(fmt::format("unable to resolve {}:{} -- {}",
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hostname,
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servname,
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gai_strerror(rc)));
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}
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auto retval = auto_fd(socket(ai->ai_family, ai->ai_socktype, 0));
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rc = ::connect(retval, ai->ai_addr, ai->ai_addrlen);
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if (rc != 0) {
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return Err(fmt::format("unable to connect to {}:{} -- {}",
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hostname,
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servname,
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strerror(rc)));
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}
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return Ok(retval);
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}
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} // namespace tcp
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} // namespace network
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