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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 <stdio.h>
#include <errno.h>
#include <string.h>
#include <limits.h>
#include <mailutils/sockaddr.h>
#include <mailutils/url.h>
#include <mailutils/io.h>
#include <mailutils/errno.h>
#include <mailutils/error.h>
#include <mailutils/nls.h>
static struct mu_sockaddr *
match_sa (struct mu_sockaddr *list, struct sockaddr *sa, socklen_t len)
{
for (; list; list = list->next)
if (len == list->addrlen && memcmp (list->addr, sa, len) == 0)
break;
return list;
}
int
mu_sockaddr_from_node (struct mu_sockaddr **retval, const char *node,
const char *serv, struct mu_sockaddr_hints *mh)
{
int rc;
if (!mh)
{
static struct mu_sockaddr_hints nullhints = { 0, AF_UNSPEC };
mh = &nullhints;
}
if (mh->family == AF_UNIX)
{
size_t slen;
struct sockaddr_un s_un;
if (!node)
return MU_ERR_NONAME;
slen = strlen (node);
if (slen >= sizeof s_un.sun_path)
return MU_ERR_BUFSPACE;
s_un.sun_family = AF_UNIX;
strcpy(s_un.sun_path, node);
return mu_sockaddr_create (retval, (struct sockaddr*) &s_un,
sizeof (s_un));
}
else
{
struct addrinfo hints;
struct addrinfo *res, *ap;
char portbuf[64];
struct mu_sockaddr *tail = NULL;
memset (&hints, 0, sizeof (hints));
hints.ai_family = mh->family;
hints.ai_socktype = mh->socktype;
hints.ai_protocol = mh->protocol;
if (!node)
{
if (mh->flags & MU_AH_PASSIVE)
hints.ai_flags |= AI_PASSIVE;
else
return MU_ERR_NONAME;
}
if (!serv && mh->port)
{
snprintf (portbuf, sizeof portbuf, "%hu", mh->port);
serv = portbuf;
}
rc = getaddrinfo (node, serv, &hints, &res);
switch (rc)
{
case 0:
break;
case EAI_FAIL:
return MU_ERR_GETHOSTBYNAME;
case EAI_FAMILY:
return MU_ERR_FAMILY;
case EAI_NONAME:
return MU_ERR_NONAME;
case EAI_SERVICE:
return MU_ERR_SERVICE;
case EAI_SYSTEM:
mu_error (_("%s:%s: cannot parse address: %s"),
node, serv, mu_strerror (errno));
return errno;
case EAI_BADFLAGS:
return MU_ERR_BADFLAGS;
case EAI_SOCKTYPE:
return MU_ERR_SOCKTYPE;
case EAI_MEMORY:
return ENOMEM;
default:
mu_error ("%s:%s: %s", node, serv, gai_strerror (rc));
return MU_ERR_FAILURE;
}
*retval = NULL;
for (ap = res; ap; ap = ap->ai_next)
if (mh->family == AF_UNSPEC || ap->ai_addr->sa_family == mh->family)
{
struct mu_sockaddr *sa;
if (match_sa (*retval, ap->ai_addr, ap->ai_addrlen))
continue;
rc = mu_sockaddr_create (&sa, ap->ai_addr, ap->ai_addrlen);
if (rc)
{
mu_sockaddr_free_list (*retval);
freeaddrinfo (res);
return rc;
}
if (tail)
mu_sockaddr_insert (tail, sa, 0);
else
*retval = sa;
tail = sa;
}
freeaddrinfo (res);
}
return 0;
}
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