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https://github.com/alsa-project/alsa-lib.git
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dbb7eca655
PCM and control shm plugins and aserver have some codes to resolve the host address and check whether it's a local host although the given address is never used. In addition, the code contains gethostbyname() that is known to be obsoleted. So, let's get rid of all these unused codes. The host configuration item is still accepted (but just ignored) for keeping the compatibility. Signed-off-by: Takashi Iwai <tiwai@suse.de>
109 lines
2.6 KiB
C
109 lines
2.6 KiB
C
/**
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* \file socket.c
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* \brief Socket helper routines
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* \author Abramo Bagnara <abramo@alsa-project.org>
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* \date 2003
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*/
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/*
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* Socket helper routines
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* Copyright (c) 2003 by Abramo Bagnara <abramo@alsa-project.org>
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*
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <sys/uio.h>
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#include <sys/un.h>
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#include <netinet/in.h>
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#include <sys/ioctl.h>
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#include <net/if.h>
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#include <netdb.h>
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#include "local.h"
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#ifndef DOC_HIDDEN
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int snd_send_fd(int sock, void *data, size_t len, int fd)
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{
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int ret;
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size_t cmsg_len = CMSG_LEN(sizeof(int));
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struct cmsghdr *cmsg = alloca(cmsg_len);
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int *fds = (int *) CMSG_DATA(cmsg);
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struct msghdr msghdr;
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struct iovec vec;
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vec.iov_base = (void *)&data;
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vec.iov_len = len;
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cmsg->cmsg_len = cmsg_len;
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cmsg->cmsg_level = SOL_SOCKET;
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cmsg->cmsg_type = SCM_RIGHTS;
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*fds = fd;
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msghdr.msg_name = NULL;
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msghdr.msg_namelen = 0;
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msghdr.msg_iov = &vec;
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msghdr.msg_iovlen = 1;
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msghdr.msg_control = cmsg;
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msghdr.msg_controllen = cmsg_len;
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msghdr.msg_flags = 0;
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ret = sendmsg(sock, &msghdr, 0 );
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if (ret < 0) {
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SYSERR("sendmsg failed");
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return -errno;
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}
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return ret;
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}
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int snd_receive_fd(int sock, void *data, size_t len, int *fd)
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{
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int ret;
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size_t cmsg_len = CMSG_LEN(sizeof(int));
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struct cmsghdr *cmsg = alloca(cmsg_len);
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int *fds = (int *) CMSG_DATA(cmsg);
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struct msghdr msghdr;
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struct iovec vec;
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vec.iov_base = (void *)&data;
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vec.iov_len = len;
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cmsg->cmsg_len = cmsg_len;
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cmsg->cmsg_level = SOL_SOCKET;
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cmsg->cmsg_type = SCM_RIGHTS;
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*fds = -1;
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msghdr.msg_name = NULL;
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msghdr.msg_namelen = 0;
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msghdr.msg_iov = &vec;
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msghdr.msg_iovlen = 1;
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msghdr.msg_control = cmsg;
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msghdr.msg_controllen = cmsg_len;
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msghdr.msg_flags = 0;
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ret = recvmsg(sock, &msghdr, 0);
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if (ret < 0) {
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SYSERR("recvmsg failed");
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return -errno;
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}
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*fd = *fds;
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return ret;
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}
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#endif
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