Function freebsd2linux_msghdr

lib/ff_syscall_wrapper.c:840–866

* While sendmsg, need convert msg_name and msg_control from Linux to FreeBSD. * While recvmsg, need convert msg_name and msg_control from FreeBSD to Linux. * Note: linux2freebsd_msghdr and freebsd2linux_msghdr must be called in sequence and in pairs. */

 * Note: linux2freebsd_msghdr and freebsd2linux_msghdr must be called in sequence and in pairs.
 */
static int
freebsd2linux_msghdr(struct linux_msghdr *linux_msg, struct msghdr *freebsd_msg, int send_flag)
{
    if (linux_msg == NULL || freebsd_msg == NULL) {
        return -1;
    }

    if (linux_msg->msg_name && freebsd_msg->msg_name && !send_flag) {
        linux_msg->msg_name = freebsd_msg->msg_name;
        freebsd2linux_sockaddr(linux_msg->msg_name, freebsd_msg->msg_name);
        linux_msg->msg_namelen = freebsd_msg->msg_namelen;
    }

    linux_msg->msg_iov = freebsd_msg->msg_iov;
    linux_msg->msg_iovlen = freebsd_msg->msg_iovlen;
    /* Restore the old iov pointer, compatible with the Linux interface */
    memcpy(linux_msg->msg_iov, msg_iov_tmp, msg_iovlen_tmp * sizeof(struct iovec));

    if(freebsd_msg->msg_control && linux_msg->msg_control && !send_flag) {
        freebsd2linux_cmsghdr(linux_msg, freebsd_msg);
        linux_msg->msg_controllen = freebsd_msg->msg_controllen;
    }

    linux_msg->msg_flags = freebsd_msg->msg_flags;

    return 0;
}

static int
linux2freebsd_msghdr(const struct linux_msghdr *linux_msg, struct msghdr *freebsd_msg, int send_flag)