1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
/**
* Copyright (c) 2021, Timothy Stack
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of Timothy Stack nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "network.tcp.hh"
#include <netdb.h>
#include <sys/socket.h>
#include <sys/types.h>
#include "auto_mem.hh"
#include "config.h"
#include "fmt/format.h"
namespace network {
namespace tcp {
Result<auto_fd, std::string>
connect(const char* hostname, const char* servname)
{
struct addrinfo hints;
auto_mem<addrinfo> ai(freeaddrinfo);
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
auto rc = getaddrinfo(hostname, servname, &hints, ai.out());
if (rc != 0) {
return Err(fmt::format(FMT_STRING("unable to resolve {}:{} -- {}"),
hostname,
servname,
gai_strerror(rc)));
}
auto retval = auto_fd(socket(ai->ai_family, ai->ai_socktype, 0));
rc = ::connect(retval, ai->ai_addr, ai->ai_addrlen);
if (rc != 0) {
return Err(fmt::format(FMT_STRING("unable to connect to {}:{} -- {}"),
hostname,
servname,
strerror(rc)));
}
return Ok(std::move(retval));
}
} // namespace tcp
} // namespace network
|
