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//==========================================================================

//

//      net/net_io.c

//

//      Stand-alone network logical I/O support for RedBoot

//

//==========================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

// Copyright (C) 2002 Gary Thomas

//

// eCos is free software; you can redistribute it and/or modify it under

// the terms of the GNU General Public License as published by the Free

// Software Foundation; either version 2 or (at your option) any later version.

//

// eCos is distributed in the hope that it will be useful, but WITHOUT ANY

// WARRANTY; without even the implied warranty of MERCHANTABILITY or

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

// for more details.

//

// You should have received a copy of the GNU General Public License along

// with eCos; if not, write to the Free Software Foundation, Inc.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

//

// As a special exception, if other files instantiate templates or use macros

// or inline functions from this file, or you compile this file and link it

// with other works to produce a work based on this file, this file does not

// by itself cause the resulting work to be covered by the GNU General Public

// License. However the source code for this file must still be made available

// in accordance with section (3) of the GNU General Public License.

//

// This exception does not invalidate any other reasons why a work based on

// this file might be covered by the GNU General Public License.

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

// -------------------------------------------

//####ECOSGPLCOPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    gthomas

// Contributors: gthomas

// Date:         2000-07-14

// Purpose:      

// Description:  

//              

// This code is part of RedBoot (tm).

//

//####DESCRIPTIONEND####

//

//==========================================================================

#include <redboot.h>

#include <cyg/io/eth/eth_drv.h>            // Logical driver interfaces

#include <net/net.h>

#include <cyg/hal/hal_misc.h>   // Helper functions

#include <cyg/hal/hal_if.h>     // HAL I/O interfaces

#include <cyg/hal/drv_api.h>

#include <cyg/hal/hal_intr.h>

#ifdef CYGSEM_REDBOOT_FLASH_CONFIG

#include <flash_config.h>

RedBoot_config_option("GDB connection port",

                      gdb_port,

                      ALWAYS_ENABLED, true,

                      CONFIG_INT,

                      CYGNUM_REDBOOT_NETWORKING_TCP_PORT

    );

RedBoot_config_option("Network debug at boot time",

                      net_debug,

                      ALWAYS_ENABLED, true,

                      CONFIG_BOOL,

                      false

    );

// Note: the following options are related.  If 'bootp' is false, then

// the other values are used in the configuration.  Because of the way

// that configuration tables are generated, they should have names which

// are related.  The configuration options will show up lexicographically

// ordered, thus the peculiar naming.  In this case, the 'use' option is

// negated (if false, the others apply) which makes the names even more

// confusing.

RedBoot_config_option("Use BOOTP for network configuration",

                      bootp,

                      ALWAYS_ENABLED, true,

                      CONFIG_BOOL,

                      true

    );

RedBoot_config_option("Local IP address",

                      bootp_my_ip,

                      "bootp", false,

                      CONFIG_IP,

    );

#ifdef CYGSEM_REDBOOT_NETWORKING_USE_GATEWAY

RedBoot_config_option("Local IP address mask",

                      bootp_my_ip_mask,

                      "bootp", false,

                      CONFIG_IP,

    );

RedBoot_config_option("Gateway IP address",

                      bootp_my_gateway_ip,

                      "bootp", false,

                      CONFIG_IP,

    );

#endif

RedBoot_config_option("Default server IP address",

                      bootp_server_ip,

                      "bootp", false,

                      CONFIG_IP,

    );

// Note: the following options are related too.

RedBoot_config_option("Force console for special debug messages",

                      info_console_force,

                      ALWAYS_ENABLED, true,

                      CONFIG_BOOL,

                      false

    );

RedBoot_config_option("Console number for special debug messages",

                      info_console_number,

                      "info_console_force", true,

                      CONFIG_INT,

    );

#endif

#define TCP_CHANNEL CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS

#ifdef DEBUG_TCP

int show_tcp = 0;

#endif 

static tcp_socket_t tcp_sock;

static int state;

static int _timeout = 500;

static int orig_console, orig_debug;

static int in_buflen = 0;

static unsigned char in_buf[64];

static unsigned char *in_bufp;

static int out_buflen = 0;

static unsigned char out_buf[1024];

static unsigned char *out_bufp;

static bool flush_output_lines = false;

// Functions in this module

static void net_io_flush(void);

static void net_io_revert_console(void);

static void net_io_putc(void*, cyg_uint8);

// Special characters used by Telnet - must be interpretted here

#define TELNET_IAC    0xFF // Interpret as command (escape)

#define TELNET_IP     0xF4 // Interrupt process

#define TELNET_WONT   0xFC // I Won't do it

#define TELNET_DO     0xFD // Will you XXX

#define TELNET_TM     0x06 // Time marker (special DO/WONT after IP)

static cyg_bool

_net_io_getc_nonblock(void* __ch_data, cyg_uint8* ch)

{

    if (in_buflen == 0) {

        __tcp_poll();

        if (tcp_sock.state == _CLOSE_WAIT) {

            // This connection is breaking

            if (tcp_sock.data_bytes == 0 && tcp_sock.rxcnt == 0) {

                __tcp_close(&tcp_sock);

                return false;

            }

        }

        if (tcp_sock.state == _CLOSED) {

            // The connection is gone

            net_io_revert_console();

            *ch = '\n';

            return true;

        }

        in_buflen = __tcp_read(&tcp_sock, in_buf, sizeof(in_buf));

        in_bufp = in_buf;

#ifdef DEBUG_TCP

        if (show_tcp && (in_buflen > 0)) {

            int old_console;

            old_console = start_console();

            diag_printf("%s:%d\n", __FUNCTION__, __LINE__);

            diag_dump_buf(in_buf, in_buflen);

            end_console(old_console);

        }

#endif // DEBUG_TCP

    }

    if (in_buflen) {

        *ch = *in_bufp++;

        in_buflen--;

        return true;

    } else {

        return false;

    }

}

static cyg_bool

net_io_getc_nonblock(void* __ch_data, cyg_uint8* ch)

{

    cyg_uint8 esc;

    if (!_net_io_getc_nonblock(__ch_data, ch))

        return false;

    if (gdb_active || *ch != TELNET_IAC)

        return true;

    // Telnet escape - need to read/handle more

    while (!_net_io_getc_nonblock(__ch_data, &esc)) ;

    switch (esc) {

    case TELNET_IAC:

        // The other special case - escaped escape

        return true;

    case TELNET_IP:

        // Special case for ^C == Interrupt Process

        *ch = 0x03;

        // Just in case the other end needs synchronizing

        net_io_putc(__ch_data, TELNET_IAC);

        net_io_putc(__ch_data, TELNET_WONT);

        net_io_putc(__ch_data, TELNET_TM);

        net_io_flush();

        return true;

    case TELNET_DO:

        // Telnet DO option

        while (!_net_io_getc_nonblock(__ch_data, &esc)) ;

        // Respond with WONT option

        net_io_putc(__ch_data, TELNET_IAC);

        net_io_putc(__ch_data, TELNET_WONT);

        net_io_putc(__ch_data, esc);

        return false;  // Ignore this whole thing!

    default:

        return false;

    }

}

static cyg_uint8

net_io_getc(void* __ch_data)

{

    cyg_uint8 ch;

    int idle_timeout = 10;  // 10ms

    CYGARC_HAL_SAVE_GP();

    while (true) {

        if (net_io_getc_nonblock(__ch_data, &ch)) break;

        if (--idle_timeout == 0) {

            net_io_flush();

            idle_timeout = 10;

        }

    }

    CYGARC_HAL_RESTORE_GP();

    return ch;

}

static void

net_io_flush(void)

{

    int n;

    char *bp = out_buf;

#ifdef DEBUG_TCP

    if (show_tcp) {

        int old_console;

        old_console = start_console();

        diag_printf("%s.%d\n", __FUNCTION__, __LINE__);

        diag_dump_buf(out_buf, out_buflen);

        end_console(old_console);

    }

#endif // SHOW_TCP

    n = __tcp_write_block(&tcp_sock, bp, out_buflen);

    if (n < 0) {

        // The connection is gone!

        net_io_revert_console();

    } else {

        out_buflen -= n;

        bp += n;

    }

    out_bufp = out_buf;  out_buflen = 0;

    // Check interrupt flag

    if (CYGACC_CALL_IF_CONSOLE_INTERRUPT_FLAG()) {

        CYGACC_CALL_IF_CONSOLE_INTERRUPT_FLAG_SET(0);

        cyg_hal_user_break(0);

    }

}

static void

net_io_putc(void* __ch_data, cyg_uint8 c)

{

    static bool have_dollar, have_hash;

    static int hash_count;

    CYGARC_HAL_SAVE_GP();

    *out_bufp++ = c;

    if (c == '$') have_dollar = true;

    if (have_dollar && (c == '#')) {

        have_hash = true;

        hash_count = 0;

    }

    if ((++out_buflen == sizeof(out_buf)) ||

        (flush_output_lines && c == '\n') ||

        (have_hash && (++hash_count == 3))) {

        net_io_flush();

        have_dollar = false;

    }

    CYGARC_HAL_RESTORE_GP();

}

static void

net_io_write(void* __ch_data, const cyg_uint8* __buf, cyg_uint32 __len)

{

    int old_console;

    old_console = start_console();

    diag_printf("%s.%d\n", __FUNCTION__, __LINE__);

    end_console(old_console);

#if 0

    CYGARC_HAL_SAVE_GP();

    while(__len-- > 0)

        net_io_putc(__ch_data, *__buf++);

    CYGARC_HAL_RESTORE_GP();

#endif

}

static void

net_io_read(void* __ch_data, cyg_uint8* __buf, cyg_uint32 __len)

{

    int old_console;

    old_console = start_console();

    diag_printf("%s.%d\n", __FUNCTION__, __LINE__);

    end_console(old_console);

#if 0

    CYGARC_HAL_SAVE_GP();

    while(__len-- > 0)

        *__buf++ = net_io_getc(__ch_data);

    CYGARC_HAL_RESTORE_GP();

#endif

}

static cyg_bool

net_io_getc_timeout(void* __ch_data, cyg_uint8* ch)

{

    int delay_count;

    cyg_bool res;

    CYGARC_HAL_SAVE_GP();

    net_io_flush();  // Make sure any output has been sent

    delay_count = _timeout;

    for(;;) {

        res = net_io_getc_nonblock(__ch_data, ch);

        if (res || 0 == delay_count--)

            break;

    }

    CYGARC_HAL_RESTORE_GP();

    return res;

}

static int

net_io_control(void *__ch_data, __comm_control_cmd_t __func, ...)

{

    static int vector = 0;

    int ret = 0;

    static int irq_state = 0;

    CYGARC_HAL_SAVE_GP();

    switch (__func) {

    case __COMMCTL_IRQ_ENABLE:

        irq_state = 1;

        if (vector == 0) {

            vector = eth_drv_int_vector();

        }

        HAL_INTERRUPT_UNMASK(vector);

        break;

    case __COMMCTL_IRQ_DISABLE:

        ret = irq_state;

        irq_state = 0;

        if (vector == 0) {

            vector = eth_drv_int_vector();

        }

        HAL_INTERRUPT_MASK(vector);

        break;

    case __COMMCTL_DBG_ISR_VECTOR:

        ret = vector;

        break;

    case __COMMCTL_SET_TIMEOUT:

    {

        va_list ap;

        va_start(ap, __func);

        ret = _timeout;

        _timeout = va_arg(ap, cyg_uint32);

        va_end(ap);

        break;

    }

    case __COMMCTL_FLUSH_OUTPUT:

        net_io_flush();

        break;

    case __COMMCTL_ENABLE_LINE_FLUSH:

        flush_output_lines = true;

        break;

    case __COMMCTL_DISABLE_LINE_FLUSH:

        flush_output_lines = false;

        break;

    default:

        break;

    }

    CYGARC_HAL_RESTORE_GP();

    return ret;

}

static int

net_io_isr(void *__ch_data, int* __ctrlc,

           CYG_ADDRWORD __vector, CYG_ADDRWORD __data)

{

    char ch;

    CYGARC_HAL_SAVE_GP();

    *__ctrlc = 0;

    if (net_io_getc_nonblock(__ch_data, &ch)) {

        if (ch == 0x03) {

            *__ctrlc = 1;

        }

    }

    CYGARC_HAL_RESTORE_GP();

    return CYG_ISR_HANDLED;

}

// TEMP

int

start_console(void)

{

    int cur_console =

        CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);

#ifdef CYGSEM_REDBOOT_FLASH_CONFIG

    int i = 0;

    if ( flash_get_config( "info_console_force", &i, CONFIG_BOOL) )

        if ( i )

            if ( ! flash_get_config( "info_console_number", &i, CONFIG_INT) )

                i = 0; // the default, if that call failed.

    if ( i )

        CYGACC_CALL_IF_SET_CONSOLE_COMM(i);

    else

#endif

        CYGACC_CALL_IF_SET_CONSOLE_COMM(0);

    return cur_console;

}

void

end_console(int old_console)

{

    // Restore original console

    CYGACC_CALL_IF_SET_CONSOLE_COMM(old_console);

}

// TEMP

static void

net_io_revert_console(void)

{

#ifdef CYGPKG_REDBOOT_ANY_CONSOLE

    console_selected = false;

#endif

    CYGACC_CALL_IF_SET_CONSOLE_COMM(orig_console);

    CYGACC_CALL_IF_SET_DEBUG_COMM(orig_debug);

    console_echo = true;

}

static void

net_io_assume_console(void)

{

#ifdef CYGPKG_REDBOOT_ANY_CONSOLE

    console_selected = true;

#endif

    console_echo = false;

    orig_console = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);

    CYGACC_CALL_IF_SET_CONSOLE_COMM(TCP_CHANNEL);

    orig_debug = CYGACC_CALL_IF_SET_DEBUG_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);

    CYGACC_CALL_IF_SET_DEBUG_COMM(TCP_CHANNEL);

}

static void

net_io_init(void)

{

    static int init = 0;

    if (!init) {

        hal_virtual_comm_table_t* comm;

        int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);

        // Setup procs in the vector table

        CYGACC_CALL_IF_SET_CONSOLE_COMM(TCP_CHANNEL);

        comm = CYGACC_CALL_IF_CONSOLE_PROCS();

        //CYGACC_COMM_IF_CH_DATA_SET(*comm, chan);

        CYGACC_COMM_IF_WRITE_SET(*comm, net_io_write);

        CYGACC_COMM_IF_READ_SET(*comm, net_io_read);

        CYGACC_COMM_IF_PUTC_SET(*comm, net_io_putc);

        CYGACC_COMM_IF_GETC_SET(*comm, net_io_getc);

        CYGACC_COMM_IF_CONTROL_SET(*comm, net_io_control);

        CYGACC_COMM_IF_DBG_ISR_SET(*comm, net_io_isr);

        CYGACC_COMM_IF_GETC_TIMEOUT_SET(*comm, net_io_getc_timeout);

        // Disable interrupts via this interface to set static

        // state into correct state.

        net_io_control( comm, __COMMCTL_IRQ_DISABLE );

        // Restore original console

        CYGACC_CALL_IF_SET_CONSOLE_COMM(cur);

        init = 1;

        gdb_active = false;

    }

    __tcp_listen(&tcp_sock, gdb_port);

    state = tcp_sock.state;

#ifdef DEBUG_TCP

    diag_printf("show tcp = %p\n", (void *)&show_tcp);

#endif

}

// Check for incoming TCP debug connection

void

net_io_test(bool is_idle)

{

    if (!is_idle) return;  // Only care about idle case

    if (!have_net) return;

    __tcp_poll();

    if (state != tcp_sock.state) {

        // Something has changed

        if (tcp_sock.state == _ESTABLISHED) {

            // A new connection has arrived

            net_io_assume_console();

            in_bufp = in_buf;  in_buflen = 1;  *in_bufp = '\r';

            out_bufp = out_buf;  out_buflen = 0;

        }

        if (tcp_sock.state == _CLOSED) {

            net_io_init();  // Get ready for another connection

        }

    }

    state = tcp_sock.state;

}

// This schedules the 'net_io_test()' function to be run by RedBoot's

// main command loop when idle (i.e. when no input arrives after some

// period of time).

RedBoot_idle(net_io_test, RedBoot_IDLE_NETIO);

//

// Network initialization

//

#include <cyg/io/eth/eth_drv.h>

#include <cyg/io/eth/netdev.h>

#include <cyg/hal/hal_tables.h>

// Define table boundaries

CYG_HAL_TABLE_BEGIN( __NETDEVTAB__, netdev );

CYG_HAL_TABLE_END( __NETDEVTAB_END__, netdev );

RedBoot_init(net_init, RedBoot_INIT_LAST);

static void

show_addrs(void)

{

    diag_printf("IP: %s", inet_ntoa((in_addr_t *)&__local_ip_addr));

#ifdef CYGSEM_REDBOOT_NETWORKING_USE_GATEWAY

    diag_printf("/%s", inet_ntoa((in_addr_t *)&__local_ip_mask));

    diag_printf(", Gateway: %s\n", inet_ntoa((in_addr_t *)&__local_ip_gate));

#else

    diag_printf(", ");

#endif

    diag_printf("Default server: %s", inet_ntoa(&my_bootp_info.bp_siaddr));

#ifdef CYGPKG_REDBOOT_NETWORKING_DNS

    show_dns();

#endif

    diag_printf("\n");

}

#ifdef CYGSEM_REDBOOT_FLASH_CONFIG

static void

flash_get_IP(char *id, ip_addr_t *val)

{

    ip_addr_t my_ip;

    int i;

    if (flash_get_config(id, &my_ip, CONFIG_IP)) {

        if (my_ip[0] != 0 || my_ip[1] != 0 ||

            my_ip[2] != 0 || my_ip[3] != 0) {

            // 'id' is set to something so let it override any static IP

            for (i=0; i<4; i++)

                (*val)[i] = my_ip[i];

        }

    }

}

#endif

void

net_init(void)

{

    cyg_netdevtab_entry_t *t;

    // Set defaults as appropriate

#ifdef CYGSEM_REDBOOT_DEFAULT_NO_BOOTP

    use_bootp = false;

#else

    use_bootp = true;

#endif

#ifdef CYGDBG_REDBOOT_NET_DEBUG

    net_debug = true;

#else

    net_debug = false;

#endif

    gdb_port = CYGNUM_REDBOOT_NETWORKING_TCP_PORT;

#ifdef CYGSEM_REDBOOT_FLASH_CONFIG

    // Fetch values from saved config data, if available

    flash_get_config("net_debug", &net_debug, CONFIG_BOOL);

    flash_get_config("gdb_port", &gdb_port, CONFIG_INT);

    flash_get_config("bootp", &use_bootp, CONFIG_BOOL);

    if (!use_bootp)

    {

        flash_get_IP("bootp_my_ip", &__local_ip_addr);

#ifdef CYGSEM_REDBOOT_NETWORKING_USE_GATEWAY

        flash_get_IP("bootp_my_ip_mask", &__local_ip_mask);

        flash_get_IP("bootp_my_gateway_ip", &__local_ip_gate);

#endif

        flash_get_config("bootp_server_ip", &my_bootp_info.bp_siaddr,

                         CONFIG_IP);

    }

#endif

# ifdef CYGDBG_IO_ETH_DRIVERS_DEBUG

    // Don't override if the user has deliberately set something more

    // verbose.

    if (0 == cyg_io_eth_net_debug)

        cyg_io_eth_net_debug = net_debug;

# endif

    have_net = false;

    // Make sure the recv buffers are set up

    eth_drv_buffers_init();

    __pktbuf_init();

    // Initialize all network devices

    for (t = &__NETDEVTAB__[0]; t != &__NETDEVTAB_END__; t++) {

        if (t->init(t)) {

            t->status = CYG_NETDEVTAB_STATUS_AVAIL;

        } else {

            // What to do if device init fails?

            t->status = 0;  // Device not [currently] available

        }

    }

    if (!__local_enet_sc) {

        diag_printf("No network interfaces found\n");

        return;

    }

    // Initialize the network [if present]

    if (use_bootp) {

        if (__bootp_find_local_ip(&my_bootp_info) == 0) {

            have_net = true;

        } else {

            // Is it an unset address, or has it been set to a static addr

            if (__local_ip_addr[0] == 0 && __local_ip_addr[1] == 0 &&

                __local_ip_addr[2] == 0 && __local_ip_addr[3] == 0) {

                diag_printf("Ethernet %s: MAC address %02x:%02x:%02x:%02x:%02x:%02x\n",

                            __local_enet_sc->dev_name,

                            __local_enet_addr[0],

                            __local_enet_addr[1],

                            __local_enet_addr[2],

                            __local_enet_addr[3],

                            __local_enet_addr[4],

                            __local_enet_addr[5]);

                diag_printf("Can't get BOOTP info for device!\n");

            } else {

                diag_printf("Can't get BOOTP info, using default IP address\n");

                have_net = true;

            }

        }