File content as of revision 21:d5018a680915:

#include "mbed.h"
#include "WizziDebug.h"

#include "modem_ref.h"
#include "kal_crypto.h"

#if 0
    #define REF_PRINT(...)  PRINT(__VA_ARGS__)
    #define URC_PRINT(...)  PRINT(__VA_ARGS__)
#else
    #define REF_PRINT(...);
    #define URC_PRINT(...);
#endif

typedef struct {
    action_callback_t*      cb;
    u8*                     data;
    u8*                     istatus;
} modem_user_t;

typedef struct {
    u8*                     data;
    u8                      type;
    u8                      length;
} modem_istatus_t;

typedef struct {
    fx_serial_send_t*   send;
    modem_callbacks_t*  cb;
    modem_user_t        user[MAX_USER_NB];
    modem_istatus_t     istatus;
    u8                  state;
    u8                  tx_sequ;
} modem_ctx_t;
static modem_ctx_t g_modem;

#define STATE_OPEN      0xab
#define STATE_CLOSED    0

#define ROOT_KEY_SIZE   16

#define SERIAL_SEND(_flow,_data,_size)  do { \
    ASSERT(_size<256, "SERIAL_SEND too big for serial protocol (%d/%dmax)", _size, 255);\
    u8 wch[WC_HEADER_SIZE] = {WC_SYNC_BYTE_0,WC_SYNC_BYTE_1,_size,g_modem.tx_sequ++,_flow};\
    g_modem.send(wch,WC_HEADER_SIZE,_data,_size);\
}while(0)

// Flows
#define WC_FLOWID_CMD       0x10
#define WC_FLOWID_ALP       0x20
#define WC_FLOWID_SYS       0x30

// Sub-Flows
#define WC_FLOW_ALP_CMD     0x20
#define WC_FLOW_ALP_RESP    0x21
#define WC_FLOW_ALP_UNS     0x22
#define WC_FLOW_SYS_RST     0x30
#define WC_FLOW_SYS_PING    0x34
#define WC_FLOW_SYS_PONG    0x35
#define WC_FLOW_SYS_CFG     0x36
#define WC_FLOW_SYS_XON     0x39
#define WC_FLOW_SYS_XOFF    0x3a
#define WC_FLOW_SYS_XACK    0x3b

// Misc CMD...
#define WM_BOOT             0x81


protected void modem_input(u8 flowid,u8* payload,u8 size)
{
    int rem =size;
    u8* p = payload;
    alp_parsed_chunk_t r;
    int id = -1;
    s8 err = ALP_ERR_NONE;
    u8 eop;
    //REF_PRINT("input 0x%x/%d Bytes\n",flowid,size);
    switch (flowid)
    {
        case WC_FLOW_ALP_UNS:
        case WC_FLOW_ALP_CMD:
            rem -= alp_parse_chunk(&p, &r);
            //REF_PRINT("Rem %d Bytes\n", rem);
            // This should always be a TAG'ed request in case of FS access...
            if (r.type == ALP_OPCODE_TAG)
            {
                id = r.meta.tag.id;
                while(rem>0)
                {
                    // Parse File Operation
                    rem -= alp_parse_chunk(&p, &r);
                    //REF_PRINT("ALP OP[%d]\n",r.type);
                    switch (r.type)
                    {
                        case ALP_OPCODE_F_RD_DATA:
                            ASSERT((ALP_ACTION_RSP_TAG_SIZE + ALP_ACTION_RSP_F_DATA_SIZE_MAX(r.meta.f_data.length)) < 256,
                                "F_RD_DATA too big for serial protocol (%d/%dmax)", r.meta.f_data.length, 255 - (ALP_ACTION_RSP_TAG_SIZE + ALP_ACTION_RSP_F_DATA_SIZE_MAX(0)));
                            g_modem.cb->read(r.meta.f_data.fid,r.meta.f_data.offset,r.meta.f_data.length,id);
                            break;
                        case ALP_OPCODE_F_WR_DATA:
                            g_modem.cb->write(r.meta.f_data.fid,r.data,r.meta.f_data.offset,r.meta.f_data.length,id);
                            break;
                        case ALP_OPCODE_F_RD_PROP:
                            g_modem.cb->read_fprop(r.meta.f_data.fid,id);
                            break;
                        case ALP_OPCODE_F_DELETE:
                            g_modem.cb->remove(r.meta.f_data.fid,id);
                            break;
                        case ALP_OPCODE_F_FLUSH:
                            g_modem.cb->flush(r.meta.f_data.fid,id);
                            break;
                        default:
                            ASSERT(false,"ASSERT: Unsupported ALP File Operation: %d\n",r.type);
                            break;
                    }
                }
            }
            else
            {
                // ... or a 'real' URC (or ISTATUS if enabled on modem)
                g_modem.istatus = (modem_istatus_t){0};
                do
                {
                    switch (r.type)
                    {
                        case ALP_OPCODE_RSP_ISTATUS:
                            // ISTATUS can come either alone or together with ALP_OPCODE_RSP_F_DATA
                            // but there should be only one per payload, moreover it will come first
                            URC_PRINT("Got ISTATUS[%x] %d Bytes\n",r.meta.itf.type,r.meta.itf.length);
                            g_modem.istatus.type    = r.meta.itf.type;
                            g_modem.istatus.length  = r.meta.itf.length;
                            g_modem.istatus.data    = r.data;
                            if (0)// (!rem) // TODO : do we really want this ?
                            {
                                g_modem.cb->udata(  0, NULL, 0, 0,
                                                    g_modem.istatus.type,
                                                    g_modem.istatus.length,
                                                    g_modem.istatus.data);
                            }
                            break;
                        case ALP_OPCODE_RSP_F_DATA:
                            // RSP_F_DATA can come either alone or together with ISTATUS
                            g_modem.cb->udata(  r.meta.f_data.fid,
                                                r.data,
                                                r.meta.f_data.offset,
                                                r.meta.f_data.length,
                                                g_modem.istatus.type,
                                                g_modem.istatus.length,
                                                g_modem.istatus.data);
                            break;
                        case ALP_OPCODE_RSP_URC:
                            if (r.meta.urc.type == ALP_URC_TYPE_LQUAL)
                                g_modem.cb->lqual(r.meta.urc.ifid,r.meta.urc.per);
                            else if (r.meta.urc.type == ALP_URC_TYPE_LQUAL)
                                g_modem.cb->ldown(r.meta.urc.ifid);
                            else
                                ASSERT(false,"ASSERT: Unsupported ALP URC: %d\n",r.meta.urc.type);
                            break;
                        default:
                            ASSERT(false,"ASSERT: Unsupported ALP URC: %d\n",r.type);
                            break;
                    }

                    int tem = alp_parse_chunk(&p, &r);
                    if (!tem)
                    {
                        break;
                    }
                    rem -= tem;
                } while (rem>=0);
            }
            break;
        case WC_FLOW_ALP_RESP:
            // This should always be a TAG'ed response as we tag our requests
            rem -= alp_parse_chunk(&p, &r);
            ASSERT((r.type == ALP_OPCODE_RSP_TAG),"ASSERT: expecting RESP_TAG got %d\n",r.type);
            id  = r.meta.tag.id;
            eop = r.meta.tag.eop;
            ASSERT(g_modem.user[id].cb != NULL,"ASSERT: NULL Callback for ID %d\n",id);
            // Empty response
            if (rem <= 0)
            {
                // TODO: still no info on error...
                REF_PRINT("ERROR\n");
                err = r.meta.tag.err ? ALP_ERR_UNKNOWN : ALP_ERR_NONE;
                g_modem.user[id].cb(eop,err,id);
                return;
            }

            // Actual response(s)
            while(rem>0)
            {
                rem -= alp_parse_chunk(&p, &r);
                switch (r.type)
                {
                    case ALP_OPCODE_RSP_TAG:
                        REF_PRINT("RSP_TAG[%d]\n", r.meta.tag.id);
                        break;
                    case ALP_OPCODE_RSP_F_DATA:
                        REF_PRINT("RSP_F_DATA[%d]\n", r.meta.f_data.length);
                        ASSERT(g_modem.user[id].data != NULL,"ASSERT: NULL Data Buffer for RD on ID %d\n",id);
                        memcpy(g_modem.user[id].data,r.data,r.meta.f_data.length);
                        break;
                    case ALP_OPCODE_RSP_F_PROP:
                        REF_PRINT("RSP_F_PROP[%d]\n", r.meta.f_data.length);
                        ASSERT(g_modem.user[id].data != NULL,"ASSERT: NULL Data Buffer for RD on ID %d\n",id);
                        memcpy(g_modem.user[id].data,r.data,r.meta.f_data.length);
                        break;
                    case ALP_OPCODE_RSP_STATUS:
                        REF_PRINT("RSP_STATUS[%d]\n", r.meta.status.code);
                        err = r.meta.status.code;
                        break;
                    case ALP_OPCODE_RSP_ISTATUS:
                        REF_PRINT("RSP_ISTATUS[%d]\n", r.meta.itf.length);
                        ASSERT(g_modem.user[id].istatus != NULL,"ASSERT: NULL ISTAT Buffer for RD on ID %d\n",id);
                        memcpy(g_modem.user[id].istatus,r.data,r.meta.itf.length);
                        break;
                    default:
                        ASSERT(false,"ASSERT: Unsupported ALP Response: %d\n",r.type);
                        break;
                }
            }
            if(eop)
            { // This is mainly for debug, catch old pointers
                //g_modem.user[id].data   = NULL;
                //g_modem.user[id].istatus= NULL;
                REF_PRINT("EOP\n");
            }
            // User Callback
            g_modem.user[id].cb(eop,err,id);
            break;
        case WC_FLOW_SYS_RST:
            // 'Software' reset request
            g_modem.cb->reset();
            break;
        case WC_FLOWID_CMD:
            if (*p == WM_BOOT)
            {
                u16 nb_boot;
                u8 cause;
                p++;
                cause = p[0];
                nb_boot = HAL_TO_U16(p[3],p[2]);
                g_modem.cb->boot(cause,nb_boot);
            }
            else
            {
                REF_PRINT("Unsupported CMD :0x%x\n",*p);
            }
            break;
         default:
            REF_PRINT("Unsupported WC Flowid:0x%x / %d Bytes\n",flowid,size);
            break;
    }
}

private u32 modem_add_root_permission(u8* p, u8* root_key, u8* action, u32 action_size)
{
    u8 hash[32];

    // Calculate hash on action
    kal_sha256_init();
    kal_sha256_update(action, action_size);
    kal_sha256_update(root_key, ROOT_KEY_SIZE);
    kal_sha256_final(hash);
    // Prepend Permission-request...
    ALP_ACTION_PERM_REQ(p, false, ALP_PERM_REQ_ROOT);
    // ... and hash
    memcpy(p, hash, ALP_WIZZILAB_AUTH_PROTOCOL_TOKEN_SIZE);

    return ALP_ACTION_PERM_REQ_OFFSET;
}

public int modem_get_id(action_callback_t* cb)
{
    int i;
    for(i=0;i<MAX_USER_NB;i++)
    {
        if (g_modem.user[i].cb == NULL)
        {
            g_modem.user[i].cb = cb;
            //REF_PRINT("Get ID:%d/0x%08x\n",i,cb);
            return i;
        }
    }
    ASSERT(i < MAX_USER_NB,"ASSERT: out of users\n");
    return -1;
}

public int modem_free_id(u8 id)
{
    if (id < MAX_USER_NB)
    {
        g_modem.user[id].cb     = NULL;
        g_modem.user[id].data   = NULL;
        g_modem.user[id].istatus= NULL;
        //REF_PRINT("Free ID:%d\n",id);
        return id;
    }
    return -1;
}

public void modem_open(fx_serial_send_t* send,modem_callbacks_t* callbacks)
{
    if (g_modem.state != STATE_OPEN)
    {
        g_modem.send= send;
        g_modem.cb  = callbacks;
        memset(g_modem.user,0,(MAX_USER_NB * sizeof(modem_user_t)));

        REF_PRINT("Open Modem - Max users:%d\n",MAX_USER_NB);

        g_modem.state = STATE_OPEN;
    }
}

public void modem_close(void)
{
    if (g_modem.state == STATE_OPEN)
    {
        g_modem.state = STATE_CLOSED;
    }
}

public void modem_reset(void)
{
    SERIAL_SEND(WC_FLOW_SYS_RST,NULL,0);
}

public void modem_read_file(u8 fid, void *data, u32 offset, u32 length, u8 id)
{
    u8 tmp[ALP_ACTION_TAG_SIZE + ALP_ACTION_F_RD_DATA_SIZE_MAX];
    u8* p = tmp;
    REF_PRINT("RD[%d]@%d %d Bytes\n",fid,offset,length);
    g_modem.user[id].data = (u8*)data;
    ALP_ACTION_TAG(p,id,true);
    ALP_ACTION_F_RD_DATA(p,true,fid,offset,length);
    SERIAL_SEND(WC_FLOW_ALP_UNS,tmp, (u8)(p-tmp));
}

public void modem_read_fprop(u8 fid, alp_file_header_t* data, u8 id)
{
    u8 tmp[ALP_ACTION_TAG_SIZE + ALP_ACTION_F_RD_PROP_SIZE];
    u8* p = tmp;
    REF_PRINT("RD PROPS[%d]\n",fid);
    g_modem.user[id].data = (u8*)data;
    ALP_ACTION_TAG(p,id,true);
    ALP_ACTION_F_RD_PROP(p,true,fid);
    SERIAL_SEND(WC_FLOW_ALP_UNS,tmp, (u8)(p-tmp));
}

public void modem_read_fprop_root(u8 fid, alp_file_header_t* data, u8* root_key, u8 id)
{
    u8 tmp[ALP_ACTION_TAG_SIZE + ALP_ACTION_PERM_REQ_SIZE(ALP_ACTION_F_RD_PROP_SIZE)];
    u8* p = tmp;
    u8* lastp;
    REF_PRINT("RD PROPS (ROOT)[%d]\n",fid);
    ASSERT(root_key != NULL, "Missing ROOT KEY\n");
    g_modem.user[id].data = (u8*)data;
    ALP_ACTION_TAG(p, id, true);
    // Actual Operation will take place after PERM_REQ
    p = &tmp[ALP_ACTION_TAG_SIZE + ALP_ACTION_PERM_REQ_OFFSET];
    ALP_ACTION_F_RD_PROP(p,true,fid);
    lastp = p;
    modem_add_root_permission(&tmp[ALP_ACTION_TAG_SIZE], root_key,
            &tmp[ALP_ACTION_TAG_SIZE + ALP_ACTION_PERM_REQ_OFFSET],
            ALP_ACTION_F_RD_PROP_SIZE);
    SERIAL_SEND(WC_FLOW_ALP_UNS,tmp, (u8)(lastp-tmp));
}

public void modem_write_fprop(u8 fid, alp_file_header_t* data, u8 id)
{
    u8 tmp[ALP_ACTION_TAG_SIZE + ALP_ACTION_F_WR_PROP_SIZE_MAX];
    u8* p = tmp;
    DPRINT(L_API, "WR PROPS[%d]\n",fid);
    ALP_ACTION_TAG(p,id,true);
    ALP_ACTION_F_WR_PROP(p,true,fid,0,sizeof(alp_file_header_t),data);
    SERIAL_SEND(WC_FLOW_ALP_UNS,tmp, (u8)(p-tmp));
}

public void modem_write_fprop_root(u8 fid, alp_file_header_t* data, u8* root_key, u8 id)
{
    u8 tmp[ALP_ACTION_TAG_SIZE + ALP_ACTION_PERM_REQ_SIZE(ALP_ACTION_F_WR_PROP_SIZE_MAX)];
    u8* p = tmp;
    u8* lastp;
    DPRINT(L_API, "WR PROPS (ROOT)[%d]\n",fid);
    ASSERT(root_key != NULL, "Missing ROOT KEY\n");
    ALP_ACTION_TAG(p, id, true);
    // Actual Operation will take place after PERM_REQ
    p = &tmp[ALP_ACTION_TAG_SIZE + ALP_ACTION_PERM_REQ_OFFSET];
    ALP_ACTION_F_WR_PROP(p,true,fid,0,sizeof(alp_file_header_t),data);
    lastp = p;
    modem_add_root_permission(&tmp[ALP_ACTION_TAG_SIZE], root_key,
            &tmp[ALP_ACTION_TAG_SIZE + ALP_ACTION_PERM_REQ_OFFSET],
            ALP_ACTION_F_WR_PROP_SIZE_MAX);
    SERIAL_SEND(WC_FLOW_ALP_UNS,tmp, (u8)(lastp-tmp));
}

public void modem_write_file(u8 fid, void *data, u32 offset, u32 length, u8 id)
{
    ALLOC_BUFFER(u8,tmp,(ALP_ACTION_TAG_SIZE + ALP_ACTION_F_WR_DATA_SIZE_MAX(length)));

    u8* p = tmp;
    REF_PRINT("WR[%d]@%d %d Bytes\n",fid,offset,length);
    ALP_ACTION_TAG(p,id,true);
    ALP_ACTION_F_WR_DATA(p,true,fid,offset,length,data);
    SERIAL_SEND(WC_FLOW_ALP_UNS,tmp, (u8)(p-tmp));
    DEALLOC_BUFFER(tmp);
}

public void modem_write_file_root(u8 fid, void *data, u32 offset, u32 length, u8* root_key, u8 id)
{
    ALLOC_BUFFER(u8,tmp,(ALP_ACTION_TAG_SIZE + ALP_ACTION_PERM_REQ_SIZE(ALP_ACTION_F_WR_DATA_SIZE_MAX(length))));

    u8* p = tmp;
    u8* lastp;
    REF_PRINT("WR (ROOT)[%d]@%d %d Bytes\n",fid,offset,length);
    ASSERT(root_key != NULL, "Missing ROOT KEY\n");
    ALP_ACTION_TAG(p, id, true);
    // Actual Operation will take place after PERM_REQ
    p = &tmp[ALP_ACTION_TAG_SIZE + ALP_ACTION_PERM_REQ_OFFSET];
    ALP_ACTION_F_WR_DATA(p,true,fid,offset,length,data);
    lastp = p;
    modem_add_root_permission(&tmp[ALP_ACTION_TAG_SIZE], root_key,
            &tmp[ALP_ACTION_TAG_SIZE + ALP_ACTION_PERM_REQ_OFFSET],
            ALP_ACTION_F_WR_DATA_SIZE(offset,length));
    SERIAL_SEND(WC_FLOW_ALP_UNS,tmp, (u8)(lastp-tmp));
    DEALLOC_BUFFER(tmp);
}

public void modem_flush_file(u8 fid, u8 id)
{
    u8 tmp[ALP_ACTION_TAG_SIZE + ALP_ACTION_F_FLUSH_SIZE];
    u8* p = tmp;
    REF_PRINT("FLUSH[%d]\n",fid);
    ALP_ACTION_TAG(p,id,true);
    ALP_ACTION_F_FLUSH(p,true,fid);
    SERIAL_SEND(WC_FLOW_ALP_UNS, tmp, (u8)(p-tmp));
}

public void modem_flush_file_root(u8 fid, u8* root_key, u8 id)
{
    u8 tmp[ALP_ACTION_TAG_SIZE + ALP_ACTION_PERM_REQ_SIZE(ALP_ACTION_F_FLUSH_SIZE)];
    u8* p = tmp;
    u8* lastp;
    REF_PRINT("FLUSH (ROOT)[%d]\n",fid);
    ASSERT(root_key != NULL, "Missing ROOT KEY\n");
    ALP_ACTION_TAG(p, id, true);
    // Actual Operation will take place after PERM_REQ
    p = &tmp[ALP_ACTION_TAG_SIZE + ALP_ACTION_PERM_REQ_OFFSET];
    ALP_ACTION_F_FLUSH(p,true,fid);
    lastp = p;
    modem_add_root_permission(&tmp[ALP_ACTION_TAG_SIZE], root_key,
            &tmp[ALP_ACTION_TAG_SIZE + ALP_ACTION_PERM_REQ_OFFSET],
            ALP_ACTION_F_FLUSH_SIZE);
    SERIAL_SEND(WC_FLOW_ALP_UNS,tmp, (u8)(lastp-tmp));
}

public void modem_declare_file(u8 fid, alp_file_header_t* hdr, u8 local, u8 id)
{
    u8 tmp[ALP_ACTION_TAG_SIZE + ALP_ACTION_F_DECLARE_SIZE];
    u8* p = tmp;

    REF_PRINT("DECLARE[%d]\n",fid);
    ALP_ACTION_TAG(p,id,true);
    ALP_ACTION_F_DECLARE(p,true,fid,hdr,local);
    SERIAL_SEND(WC_FLOW_ALP_UNS,tmp, (u8)(p-tmp));
}

public void modem_create_file(u8 fid, alp_file_header_t* hdr, u8 id)
{
    u8 tmp[ALP_ACTION_TAG_SIZE + ALP_ACTION_F_CREATE_SIZE];
    u8* p = tmp;

    REF_PRINT("CREATE[%d]\n",fid);
    ALP_ACTION_TAG(p,id,true);
    ALP_ACTION_F_CREATE(p,true,fid,hdr);
    SERIAL_SEND(WC_FLOW_ALP_UNS,tmp, (u8)(p-tmp));
}

public void modem_notify_file(u8 fid, u32 offset, u32 length, u8 id)
{
    u8 tmp[ALP_ACTION_TAG_SIZE + ALP_ACTION_F_TOUCH_SIZE_MAX];
    u8* p = tmp;

    REF_PRINT("NOTIFY[%d]@%d %d Bytes\n",fid,offset,length);
    ALP_ACTION_TAG(p,id,true);
    ALP_ACTION_F_TOUCH(p,true,fid,offset,length);
    SERIAL_SEND(WC_FLOW_ALP_UNS,tmp, (u8)(p-tmp));
}

public void modem_delete_file(u8 fid, u8 id)
{
    u8 tmp[ALP_ACTION_TAG_SIZE + ALP_ACTION_F_DELETE_SIZE];
    u8* p = tmp;

    REF_PRINT("DELETE[%d]\n",fid);
    ALP_ACTION_TAG(p,id,true);
    ALP_ACTION_F_DELETE(p,true,fid);
    SERIAL_SEND(WC_FLOW_ALP_UNS,tmp, (u8)(p-tmp));
}

public void modem_send_raw_alp(u8* payload, u32 length, u8 id)
{
    ALLOC_BUFFER(u8,tmp,ALP_ACTION_TAG_SIZE + length);
    u8* p = tmp;

    REF_PRINT("ALP RAW %d Bytes\n",length);
    ALP_ACTION_TAG(p,id,true);
    // User Payload
    memcpy(p,payload,length);p+=length;
    SERIAL_SEND(WC_FLOW_ALP_UNS,tmp, (u8)(p-tmp));
    DEALLOC_BUFFER(tmp);
}

public void modem_send_file_content(u8* itf, u8 itf_length, void *istatus, u8 fid, void *data, u32 offset, u32 length, u8 id)
{
    ALLOC_BUFFER(u8,tmp,ALP_ACTION_TAG_SIZE + ALP_ACTION_FORWARD_SIZE(itf_length) + ALP_ACTION_RSP_F_DATA_SIZE_MAX(length));
    u8* p = tmp;
    g_modem.user[id].istatus= (u8*)istatus;

    REF_PRINT("SEND FILE[%d] CONTENTS @%d %d Bytes (itf %d Bytes)\n",fid,offset,length,itf_length);
    ALP_ACTION_TAG(p,id,true);
    ALP_ACTION_FORWARD(p,itf,itf_length);
    if (istatus)
    {
        // NOP action to get istats on ACKs
        ALP_ACTION_NOP(p,true);
    }
    ALP_ACTION_RSP_F_DATA(p,fid,offset,length,data);
    SERIAL_SEND(WC_FLOW_ALP_UNS,tmp, (u8)(p-tmp));
    DEALLOC_BUFFER(tmp);
}

public void modem_remote_read_file(u8* itf, u8 itf_length, void *istatus , u8 fid, void *data, u32 offset, u32 length, u8 id)
{
    ALLOC_BUFFER(u8,tmp,ALP_ACTION_TAG_SIZE + ALP_ACTION_FORWARD_SIZE(itf_length) + ALP_ACTION_F_RD_DATA_SIZE_MAX);
    u8* p = tmp;
    g_modem.user[id].data    = (u8*)data;
    g_modem.user[id].istatus = (u8*)istatus;

    REF_PRINT("RMT RD FILE[%d]@%d %d Bytes (itf %d Bytes)\n",fid,offset,length,itf_length);
    ALP_ACTION_TAG(p,id,true);
    ALP_ACTION_FORWARD(p,itf,itf_length);
    ALP_ACTION_F_RD_DATA(p,true,fid,offset,length);
    SERIAL_SEND(WC_FLOW_ALP_UNS,tmp, (u8)(p-tmp));
    DEALLOC_BUFFER(tmp);
}

public void modem_remote_write_file(u8* itf, u8 itf_length, void *istatus , u8 fid, void *data, u32 offset, u32 length, u8 id)
{
    ALLOC_BUFFER(u8,tmp,ALP_ACTION_TAG_SIZE + ALP_ACTION_FORWARD_SIZE(itf_length) + ALP_ACTION_F_WR_DATA_SIZE_MAX(length));
    u8* p = tmp;
    g_modem.user[id].istatus = (u8*)istatus;

    REF_PRINT("RMT WR FILE[%d]@%d %d Bytes (itf %d Bytes)\n",fid,offset,length,itf_length);
    ALP_ACTION_TAG(p,id,true);
    ALP_ACTION_FORWARD(p,itf,itf_length);
    ALP_ACTION_F_WR_DATA(p,true,fid,offset,length,data);
    SERIAL_SEND(WC_FLOW_ALP_UNS,tmp, (u8)(p-tmp));
    DEALLOC_BUFFER(tmp);
}

public void modem_enable_urc(u8 type, u8 ifid, u8 val, u8 enable, u8 id)
{
    u8 tmp[ALP_ACTION_TAG_SIZE + ALP_ACTION_URCC_SIZE(ALP_URC_TYPE_LQUAL)];
    u8* p = tmp;
    REF_PRINT("URC[%d] Type %d ifid %d\n",enable,type,ifid);

    ALP_ACTION_TAG(p,id,true);
    // Actual Operation
    if (enable)
    {
        ALP_ACTION_URCC_EN(p,true,type,ifid,val);
    }
    else
    {
        ALP_ACTION_URCC_DIS(p,true,type,ifid,val);
    }
    SERIAL_SEND(WC_FLOW_ALP_UNS,tmp, (u8)(p-tmp));
}

public void modem_activate_itf(u8 type, u8 nb_dev, u8 ifid, u8 flags, u8 enable, u8 id)
{
    u8 tmp[ALP_ACTION_TAG_SIZE + ALP_ACTION_ACTIVATE_ITF_SIZE];
    u8* p = tmp;

    REF_PRINT("ACTIVATE ITFTYPE[%x]:%d\n",type,enable);
    ALP_ACTION_TAG(p,id,true);
    ALP_ACTION_ACTIVATE_ITF(p,true,enable,type,nb_dev,ifid,flags);
    SERIAL_SEND(WC_FLOW_ALP_UNS,tmp, (u8)(p-tmp));
}

public void modem_respond(u8 action, s8 status, int id)
{
    u8 tmp[ALP_ACTION_RSP_TAG_SIZE + ALP_ACTION_RSP_STATUS_SIZE];
    u8* p = tmp;
    REF_PRINT("RESP[%d]:%d\n",action,status);

    if (id>=0) { ALP_ACTION_RSP_TAG(p,id,true,(status<0)?true:false); }
    ALP_ACTION_RSP_STATUS(p,action,status);
    SERIAL_SEND(WC_FLOW_ALP_RESP,tmp, (u8)(p-tmp));
}

public void modem_respond_fprop(u8 fid, u8* hdr, int id)
{
    u8 tmp[ALP_ACTION_RSP_TAG_SIZE + ALP_ACTION_RSP_F_PROP_SIZE];
    u8* p = tmp;
    REF_PRINT("RESP FPROP[%d]\n",fid);

    if (id>=0) { ALP_ACTION_RSP_TAG(p,id,true,false); }
    ALP_ACTION_RSP_F_PROP(p,fid,hdr);
    SERIAL_SEND(WC_FLOW_ALP_RESP,tmp, (u8)(p-tmp));
}

public void modem_respond_read(u8 fid,void *data, u32 offset, u32 length, int id)
{
    ALLOC_BUFFER(u8,tmp,ALP_ACTION_RSP_TAG_SIZE + ALP_ACTION_RSP_F_DATA_SIZE_MAX(length));
    u8* p = tmp;
    REF_PRINT("F_DATA[%d]@%d %d Bytes\n",fid,offset,length);
    if (id>=0) { ALP_ACTION_RSP_TAG(p,id,true,false); }
    ALP_ACTION_RSP_F_DATA(p,fid,offset,length,data);
    SERIAL_SEND(WC_FLOW_ALP_RESP,tmp, (u8)(p-tmp));
    DEALLOC_BUFFER(tmp);
}