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/* Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of The Linux Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include "mm_camera_dbg.h"
#include "mm_camera_sock.h"
#include "cam_types.h"
/*===========================================================================
* FUNCTION : mm_camera_socket_create
*
* DESCRIPTION: opens a domain socket tied to camera ID and socket type
* @cam_id : camera ID
* @sock_type: socket type, TCP/UDP
*
* RETURN : fd related to the domain socket
*==========================================================================*/
int mm_camera_socket_create(int cam_id, mm_camera_sock_type_t sock_type)
{
int socket_fd;
mm_camera_sock_addr_t sock_addr;
int sktype;
int rc;
switch (sock_type)
{
case MM_CAMERA_SOCK_TYPE_UDP:
sktype = SOCK_DGRAM;
break;
case MM_CAMERA_SOCK_TYPE_TCP:
sktype = SOCK_STREAM;
break;
default:
CDBG_ERROR("%s: unknown socket type =%d", __func__, sock_type);
return -1;
}
socket_fd = socket(AF_UNIX, sktype, 0);
if (socket_fd < 0) {
CDBG_ERROR("%s: error create socket fd =%d", __func__, socket_fd);
return socket_fd;
}
memset(&sock_addr, 0, sizeof(sock_addr));
sock_addr.addr_un.sun_family = AF_UNIX;
snprintf(sock_addr.addr_un.sun_path,
UNIX_PATH_MAX, QCAMERA_DUMP_FRM_LOCATION"cam_socket%d", cam_id);
rc = connect(socket_fd, &sock_addr.addr, sizeof(sock_addr.addr_un));
if (0 != rc) {
close(socket_fd);
socket_fd = -1;
CDBG_ERROR("%s: socket_fd=%d %s ", __func__, socket_fd, strerror(errno));
}
CDBG("%s: socket_fd=%d %s", __func__, socket_fd,
sock_addr.addr_un.sun_path);
return socket_fd;
}
/*===========================================================================
* FUNCTION : mm_camera_socket_close
*
* DESCRIPTION: close domain socket by its fd
* @fd : file descriptor for the domain socket to be closed
*
* RETURN : none
*==========================================================================*/
void mm_camera_socket_close(int fd)
{
if (fd >= 0) {
close(fd);
}
}
/*===========================================================================
* FUNCTION : mm_camera_socket_sendmsg
*
* DESCRIPTION: send msg through domain socket
* @fd : socket fd
* @msg : pointer to msg to be sent over domain socket
* @sendfd : file descriptors to be sent
*
* RETURN : the total bytes of sent msg
*==========================================================================*/
int mm_camera_socket_sendmsg(
int fd,
void *msg,
size_t buf_size,
int sendfd)
{
struct msghdr msgh;
struct iovec iov[1];
struct cmsghdr * cmsghp = NULL;
char control[CMSG_SPACE(sizeof(int))];
if (msg == NULL) {
CDBG("%s: msg is NULL", __func__);
return -1;
}
memset(&msgh, 0, sizeof(msgh));
msgh.msg_name = NULL;
msgh.msg_namelen = 0;
iov[0].iov_base = msg;
iov[0].iov_len = buf_size;
msgh.msg_iov = iov;
msgh.msg_iovlen = 1;
CDBG("%s: iov_len=%llu", __func__,
(unsigned long long int)iov[0].iov_len);
msgh.msg_control = NULL;
msgh.msg_controllen = 0;
/* if sendfd is valid, we need to pass it through control msg */
if( sendfd >= 0) {
msgh.msg_control = control;
msgh.msg_controllen = sizeof(control);
cmsghp = CMSG_FIRSTHDR(&msgh);
if (cmsghp != NULL) {
CDBG("%s: Got ctrl msg pointer", __func__);
cmsghp->cmsg_level = SOL_SOCKET;
cmsghp->cmsg_type = SCM_RIGHTS;
cmsghp->cmsg_len = CMSG_LEN(sizeof(int));
*((int *)CMSG_DATA(cmsghp)) = sendfd;
CDBG("%s: cmsg data=%d", __func__, *((int *) CMSG_DATA(cmsghp)));
} else {
CDBG("%s: ctrl msg NULL", __func__);
return -1;
}
}
return sendmsg(fd, &(msgh), 0);
}
/*===========================================================================
* FUNCTION : mm_camera_socket_recvmsg
*
* DESCRIPTION: receive msg from domain socket.
* @fd : socket fd
* @msg : pointer to mm_camera_sock_msg_packet_t to hold incoming msg,
* need be allocated by the caller
* @buf_size: the size of the buf that holds incoming msg
* @rcvdfd : pointer to hold recvd file descriptor if not NULL.
*
* RETURN : the total bytes of received msg
*==========================================================================*/
int mm_camera_socket_recvmsg(
int fd,
void *msg,
uint32_t buf_size,
int *rcvdfd)
{
struct msghdr msgh;
struct iovec iov[1];
struct cmsghdr *cmsghp = NULL;
char control[CMSG_SPACE(sizeof(int))];
int rcvd_fd = -1;
int rcvd_len = 0;
if ( (msg == NULL) || (buf_size <= 0) ) {
CDBG_ERROR(" %s: msg buf is NULL", __func__);
return -1;
}
memset(&msgh, 0, sizeof(msgh));
msgh.msg_name = NULL;
msgh.msg_namelen = 0;
msgh.msg_control = control;
msgh.msg_controllen = sizeof(control);
iov[0].iov_base = msg;
iov[0].iov_len = buf_size;
msgh.msg_iov = iov;
msgh.msg_iovlen = 1;
if ( (rcvd_len = recvmsg(fd, &(msgh), 0)) <= 0) {
CDBG_ERROR(" %s: recvmsg failed", __func__);
return rcvd_len;
}
CDBG("%s: msg_ctrl %p len %zd", __func__, msgh.msg_control,
msgh.msg_controllen);
if( ((cmsghp = CMSG_FIRSTHDR(&msgh)) != NULL) &&
(cmsghp->cmsg_len == CMSG_LEN(sizeof(int))) ) {
if (cmsghp->cmsg_level == SOL_SOCKET &&
cmsghp->cmsg_type == SCM_RIGHTS) {
CDBG("%s: CtrlMsg is valid", __func__);
rcvd_fd = *((int *) CMSG_DATA(cmsghp));
CDBG("%s: Receieved fd=%d", __func__, rcvd_fd);
} else {
CDBG_ERROR("%s: Unexpected Control Msg. Line=%d", __func__, __LINE__);
}
}
if (rcvdfd) {
*rcvdfd = rcvd_fd;
}
return rcvd_len;
}
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