139 lines
2.6 KiB
C++
139 lines
2.6 KiB
C++
// CODYlib -*- mode:c++ -*-
|
|
// Copyright (C) 2020 Nathan Sidwell, nathan@acm.org
|
|
// License: Apache v2.0
|
|
|
|
// Cody
|
|
#include "internal.hh"
|
|
|
|
#if CODY_NETWORKING
|
|
// C
|
|
#include <cerrno>
|
|
#include <cstring>
|
|
// OS
|
|
#include <netdb.h>
|
|
#include <unistd.h>
|
|
#include <arpa/inet.h>
|
|
#include <netinet/in.h>
|
|
#include <sys/un.h>
|
|
|
|
#ifndef AI_NUMERICSERV
|
|
#define AI_NUMERICSERV 0
|
|
#endif
|
|
|
|
// Client-side networking helpers
|
|
|
|
namespace Cody {
|
|
|
|
int OpenSocket (char const **e, sockaddr const *addr, socklen_t len)
|
|
{
|
|
char const *errstr = nullptr;
|
|
|
|
int fd = socket (addr->sa_family, SOCK_STREAM, 0);
|
|
if (fd < 0)
|
|
{
|
|
errstr = "creating socket";
|
|
|
|
fail:;
|
|
int err = errno;
|
|
if (e)
|
|
*e = errstr;
|
|
if (fd >= 0)
|
|
close (fd);
|
|
errno = err;
|
|
return -1;
|
|
}
|
|
|
|
if (connect (fd, addr, len) < 0)
|
|
{
|
|
errstr = "connecting socket";
|
|
goto fail;
|
|
}
|
|
|
|
return fd;
|
|
}
|
|
|
|
int OpenLocal (char const **e, char const *name)
|
|
{
|
|
sockaddr_un addr;
|
|
size_t len = strlen (name);
|
|
|
|
if (len >= sizeof (addr.sun_path))
|
|
{
|
|
errno = ENAMETOOLONG;
|
|
return -1;
|
|
}
|
|
|
|
memset (&addr, 0, offsetof (sockaddr_un, sun_path));
|
|
addr.sun_family = AF_UNIX;
|
|
memcpy (addr.sun_path, name, len + 1);
|
|
return OpenSocket (e, (sockaddr *)&addr, sizeof (addr));
|
|
}
|
|
|
|
int OpenInet6 (char const **e, char const *name, int port)
|
|
{
|
|
addrinfo *addrs = nullptr;
|
|
int fd = -1;
|
|
char const *errstr = nullptr;
|
|
|
|
fd = socket (AF_INET6, SOCK_STREAM, 0);
|
|
if (fd < 0)
|
|
{
|
|
errstr = "socket";
|
|
|
|
fail:;
|
|
int err = errno;
|
|
if (e)
|
|
*e = errstr;
|
|
if (fd >= 0)
|
|
close (fd);
|
|
if (addrs)
|
|
freeaddrinfo (addrs);
|
|
errno = err;
|
|
return -1;
|
|
}
|
|
|
|
addrinfo hints;
|
|
hints.ai_flags = 0;
|
|
hints.ai_family = AF_INET6;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_protocol = 0;
|
|
hints.ai_addrlen = 0;
|
|
hints.ai_addr = nullptr;
|
|
hints.ai_canonname = nullptr;
|
|
hints.ai_next = nullptr;
|
|
|
|
if (int err = getaddrinfo (name, nullptr, &hints, &addrs))
|
|
{
|
|
errstr = gai_strerror (err);
|
|
// What's the best errno to set?
|
|
errno = 0;
|
|
goto fail;
|
|
}
|
|
|
|
sockaddr_in6 addr;
|
|
memset (&addr, 0, sizeof (addr));
|
|
addr.sin6_family = AF_INET6;
|
|
|
|
for (struct addrinfo *next = addrs; next; next = next->ai_next)
|
|
if (next->ai_family == AF_INET6
|
|
&& next->ai_socktype == SOCK_STREAM)
|
|
{
|
|
sockaddr_in6 *in6 = (sockaddr_in6 *)next->ai_addr;
|
|
in6->sin6_port = htons (port);
|
|
if (ntohs (in6->sin6_port) != port)
|
|
errno = EINVAL;
|
|
else if (!connect (fd, next->ai_addr, next->ai_addrlen))
|
|
goto done;
|
|
}
|
|
errstr = "connecting";
|
|
goto fail;
|
|
|
|
done:;
|
|
freeaddrinfo (addrs);
|
|
|
|
return fd;
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|