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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2011-2025 Free Software Foundation, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library. If not, see
<http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdlib.h>
#include <mailutils/sockaddr.h>
#include <mailutils/errno.h>
#include <mailutils/io.h>
static char *default_sockaddr_text = "[not enogh memory]";
#define S_UN_NAME(sa, salen) \
((salen <= mu_offsetof(struct sockaddr_un,sun_path)) ? \
"" : (sa)->sun_path)
int
mu_sys_sockaddr_format (char **pbuf,
enum mu_sockaddr_format fmt,
const struct sockaddr *sa, socklen_t salen)
{
int rc = MU_ERR_FAILURE;
switch (sa->sa_family)
{
#ifdef MAILUTILS_IPV6
case AF_INET:
case AF_INET6:
{
char host[NI_MAXHOST];
char srv[NI_MAXSERV];
if (getnameinfo (sa, salen,
host, sizeof (host), srv, sizeof (srv),
NI_NUMERICHOST|NI_NUMERICSERV) == 0)
{
switch (fmt)
{
case mu_sockaddr_format_default:
if (sa->sa_family == AF_INET6)
rc = mu_asprintf (pbuf, "inet6://[%s]:%s", host, srv);
else
rc = mu_asprintf (pbuf, "inet://%s:%s", host, srv);
break;
case mu_sockaddr_format_ehlo:
rc = mu_asprintf (pbuf, "[%s]", host);
break;
}
}
else
{
switch (fmt)
{
case mu_sockaddr_format_default:
rc = mu_asprintf (pbuf, "%s://[getnameinfo failed]",
sa->sa_family == AF_INET ?
"inet" : "inet6");
break;
case mu_sockaddr_format_ehlo:
return MU_ERR_FAILURE;
}
}
break;
}
#else
case AF_INET:
{
struct sockaddr_in *s_in = (struct sockaddr_in *)sa;
switch (fmt)
{
case mu_sockaddr_format_default:
rc = mu_asprintf (pbuf, "inet://%s:%hu",
inet_ntoa (s_in->sin_addr), s_in->sin_port);
break;
case mu_sockaddr_format_ehlo:
rc = mu_asprintf (pbuf, "[%s]", inet_ntoa (s_in->sin_addr));
break;
}
break;
}
#endif
case AF_UNIX:
{
struct sockaddr_un *s_un = (struct sockaddr_un *)sa;
switch (fmt)
{
case mu_sockaddr_format_default:
if (S_UN_NAME (s_un, salen)[0] == 0)
rc = mu_asprintf (pbuf, "unix://[anonymous socket]");
else
rc = mu_asprintf (pbuf, "unix://%s", s_un->sun_path);
break;
case mu_sockaddr_format_ehlo:
rc = mu_asprintf (pbuf, "localhost");
}
break;
}
default:
rc = mu_asprintf (pbuf, "family:%d", sa->sa_family);
}
return rc;
}
char *
mu_sys_sockaddr_to_astr (const struct sockaddr *sa, int salen)
{
char *buf = NULL;
mu_sys_sockaddr_format (&buf, mu_sockaddr_format_default, sa, salen);
return buf;
}
int
mu_sockaddr_format (struct mu_sockaddr *sa, char **pbuf,
enum mu_sockaddr_format fmt)
{
return mu_sys_sockaddr_format (pbuf, fmt, sa->addr, sa->addrlen);
}
const char *
mu_sockaddr_str (struct mu_sockaddr *sa)
{
if (!sa->str
&& mu_sockaddr_format (sa, &sa->str, mu_sockaddr_format_default))
return default_sockaddr_text;
return sa->str;
}
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