/*
 * Copyright (c) 2012-2015 Texas Instruments Incorporated - http://www.ti.com
 * 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 Texas Instruments Incorporated 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 BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE 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.
 */
/*
 *  @file       SocketFxns.c
 *
 *  @brief      Shared socket functions.
 */

/* Standard headers */
#include <ti/ipc/Std.h>

/* Socket Headers */
#include <sys/types.h>
#include <sys/socket.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

/* Socket Protocol Family */
#include <net/rpmsg.h>

/* For PRINTVERBOSE* */
#include <_lad.h>

/* For MultiProc id to remoteproc index map */
#include <_MultiProc.h>

/*  Traces in this file are controlled via _SocketFxns_verbose
 *
 *  Caution! This file is used by both LAD and TransportRpmsg. The
 *  PRINTVERBOSE macros use printf(), which sends its output to
 *  STDOUT (fd = 0). However, LAD closes STDOUT and by unfortunate
 *  chance, the file descriptor zero (fd = 0) is reused for the outbound
 *  pipe to the first client. This means all trace messages go into
 *  the pipe and corrupt the data on the client side.

 *  If you want to enable this trace for LAD, in addition to setting
 *  _SocketFxns_versbose to TRUE below, you must also comment out the
 *  three calls to close() in linux/src/daemon/lad.c:
 *
 *      close(STDIN_FILENO);
 *      close(STDOUT_FILENO);
 *      close(STDERR_FILENO);
 *
 *  If you only want to enable trace in the client (i.e. calls from
 *  TransportRpmsg), then simply set the environment variable IPC_DEBUG
 *  (to either 2 or 3) before you run your program.
 *
 *  IPC_DEBUG=3 ./app_host
 */
Bool _SocketFxns_verbose = FALSE;
#define verbose _SocketFxns_verbose

int ConnectSocket(int sock, UInt16 procId, int dst)
{
    int                   err;
    struct sockaddr_rpmsg srcAddr, dstAddr;
    socklen_t             len;
    UInt16                clusterId;

    /* map procId to clusterId (rprocList[] indexed by clusterId) */
    clusterId = procId - _MultiProc_cfg.baseIdOfCluster;

    /* connect to remote service */
    memset(&dstAddr, 0, sizeof(dstAddr));
    dstAddr.family     = AF_RPMSG;
    /* convert MultiProc 'clusterId' to remoteproc index */
    dstAddr.vproc_id   = _MultiProc_cfg.rprocList[clusterId];
    dstAddr.addr       = dst;

    len = sizeof(struct sockaddr_rpmsg);
    err = connect(sock, (struct sockaddr *)&dstAddr, len);
    if (err < 0) {
        /* don't hard-printf since this is no longer fatal */
        PRINTVERBOSE2("connect failed: %s (%d)\n", strerror(errno), errno);
        return (-1);
    }

    /* let's see what local address we got */
    err = getsockname(sock, (struct sockaddr *)&srcAddr, &len);
    if (err < 0) {
        printf("getpeername failed: %s (%d)\n", strerror(errno), errno);
        return (-1);
    }

    PRINTVERBOSE3("Connected over sock: %d\n\tdst vproc_id: %d, dst addr: %d\n",
                  sock, dstAddr.vproc_id, dstAddr.addr)
    PRINTVERBOSE2("\tsrc vproc_id: %d, src addr: %d\n",
                  srcAddr.vproc_id, srcAddr.addr)

    return(0);
}

int SocketBindAddr(int fd, UInt16 procId, UInt32 localAddr)
{
    int         err;
    socklen_t    len;
    struct sockaddr_rpmsg srcAddr;
    UInt16 clusterId;

    /* map procId to clusterId (rprocList[] indexed by clusterId) */
    clusterId = procId - _MultiProc_cfg.baseIdOfCluster;

    /* Now bind to the source address.   */
    memset(&srcAddr, 0, sizeof(srcAddr));
    srcAddr.family = AF_RPMSG;
    /* We bind the remote clusterId, but local address! */
    srcAddr.vproc_id   = _MultiProc_cfg.rprocList[clusterId];
    srcAddr.addr  = localAddr;

    len = sizeof(struct sockaddr_rpmsg);
    err = bind(fd, (struct sockaddr *)&srcAddr, len);
    if (err >= 0) {
        PRINTVERBOSE3("socket_bind_addr: bound sock: %d\n\tto dst "
                      "vproc_id: %d, src addr: %d\n",
                      fd, srcAddr.vproc_id, srcAddr.addr)

        /* let's see what local address we got */
        err = getsockname(fd, (struct sockaddr *)&srcAddr, &len);
        if (err < 0) {
            printf("getsockname failed: %s (%d)\n", strerror(errno), errno);
        }
        else {
            PRINTVERBOSE2("\tsrc vproc_id: %d, src addr: %d\n",
                          srcAddr.vproc_id, srcAddr.addr)
        }
    }

    return (err);
}