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/*
* Copyright (C) 2013 Martin Willi
* Copyright (C) 2013 revosec AG
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program 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 General Public License
* for more details.
*/
#include <library.h>
#include <networking/streams/stream_unix.h>
#include <errno.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/stat.h>
/**
* See header
*/
stream_service_t *stream_service_create_unix(char *uri, int backlog)
{
struct sockaddr_un addr;
mode_t old;
int fd, len;
len = stream_parse_uri_unix(uri, &addr);
if (len == -1)
{
DBG1(DBG_NET, "invalid stream URI: '%s'", uri);
return NULL;
}
if (!lib->caps->check(lib->caps, CAP_CHOWN))
{ /* required to chown(2) service socket */
DBG1(DBG_NET, "socket '%s' requires CAP_CHOWN capability", uri);
return NULL;
}
fd = socket(AF_UNIX, SOCK_STREAM, 0);
if (fd == -1)
{
DBG1(DBG_NET, "opening socket '%s' failed: %s", uri, strerror(errno));
return NULL;
}
unlink(addr.sun_path);
old = umask(S_IRWXO);
if (bind(fd, (struct sockaddr*)&addr, len) < 0)
{
DBG1(DBG_NET, "binding socket '%s' failed: %s", uri, strerror(errno));
close(fd);
return NULL;
}
umask(old);
if (chown(addr.sun_path, lib->caps->get_uid(lib->caps),
lib->caps->get_gid(lib->caps)) != 0)
{
DBG1(DBG_NET, "changing socket permissions for '%s' failed: %s",
uri, strerror(errno));
}
if (listen(fd, backlog) < 0)
{
DBG1(DBG_NET, "listen on socket '%s' failed: %s", uri, strerror(errno));
unlink(addr.sun_path);
close(fd);
return NULL;
}
return stream_service_create_from_fd(fd);
}
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