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/*
* Copyright 2014 Ettus Research LLC
*
* This program 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 3 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include <avr/eeprom.h>
#include <avr/io.h>
#include <avr/wdt.h>
#include <octoclock.h>
#include <gpsdo.h>
#include <network.h>
#include <state.h>
#include <net/udp_handlers.h>
void handle_udp_ctrl_packet(
struct socket_address src, struct socket_address dst,
unsigned char *payload, int payload_len
){
const octoclock_packet_t *pkt_in = (octoclock_packet_t*)payload;
octoclock_packet_t pkt_out;
pkt_out.proto_ver = OCTOCLOCK_FW_COMPAT_NUM;
pkt_out.sequence = pkt_in->sequence;
//If the firmware is incompatible, only respond to queries
if(pkt_in->code == OCTOCLOCK_QUERY_CMD){
pkt_out.code = OCTOCLOCK_QUERY_ACK;
pkt_out.len = 0;
send_udp_pkt(OCTOCLOCK_UDP_CTRL_PORT, src, (void*)&pkt_out, sizeof(octoclock_packet_t));
}
else if(pkt_in->proto_ver == OCTOCLOCK_FW_COMPAT_NUM){
switch(pkt_in->code){
case SEND_EEPROM_CMD:
pkt_out.code = SEND_EEPROM_ACK;
pkt_out.len = sizeof(octoclock_fw_eeprom_t);
octoclock_fw_eeprom_t *eeprom_info = (octoclock_fw_eeprom_t*)pkt_out.data;
//Read values from EEPROM into packet
eeprom_read_block(eeprom_info, 0, sizeof(octoclock_fw_eeprom_t));
//If EEPROM network fields are not fully populated, copy defaults
if(using_network_defaults){
_MAC_ADDR(eeprom_info->mac_addr, 0x00,0x80,0x2F,0x11,0x22,0x33);
eeprom_info->ip_addr = default_ip;
eeprom_info->dr_addr = default_dr;
eeprom_info->netmask = default_netmask;
}
//Check if strings or revision is empty
if(eeprom_info->serial[0] == 0xFF) memset(eeprom_info->serial, 0, 10);
if(eeprom_info->name[0] == 0xFF) memset(eeprom_info->name, 0, 10);
if(eeprom_info->revision == 0xFF) eeprom_info->revision = 0;
break;
case BURN_EEPROM_CMD:{
//Confirm length of data
if(pkt_in->len != sizeof(octoclock_fw_eeprom_t)){
pkt_out.code = BURN_EEPROM_FAILURE_ACK;
break;
}
/*
* In all cases, a full octoclock_fw_eeprom_t is written to lower the overall
* number of writes due to this EEPROM's smaller amount of safe writes.
* It is up to the host to make sure that the values that should be
* preserved are present in the octoclock_fw_eeprom_t struct.
*/
const octoclock_fw_eeprom_t *eeprom_pkt = (octoclock_fw_eeprom_t*)pkt_in->data;
pkt_out.len = 0;
//Write EEPROM data from packet
eeprom_write_block(eeprom_pkt, 0, sizeof(octoclock_fw_eeprom_t));
//Read back and compare to packet to confirm successful write
uint8_t eeprom_contents[sizeof(octoclock_fw_eeprom_t)];
eeprom_read_block(eeprom_contents, 0, sizeof(octoclock_fw_eeprom_t));
uint8_t n = memcmp(eeprom_contents, eeprom_pkt, sizeof(octoclock_fw_eeprom_t));
pkt_out.code = n ? BURN_EEPROM_FAILURE_ACK
: BURN_EEPROM_SUCCESS_ACK;
break;
}
case SEND_STATE_CMD:
pkt_out.code = SEND_STATE_ACK;
pkt_out.len = sizeof(octoclock_state_t);
//Populate octoclock_state_t fields
octoclock_state_t *state = (octoclock_state_t*)pkt_out.data;
state->external_detected = global_ext_ref_is_present ? 1 : 0;
state->gps_detected = (PIND & _BV(DDD4)) ? 1 : 0;
state->which_ref = (uint8_t)which_ref();
state->switch_pos = (uint8_t)get_switch_pos();
break;
case RESET_CMD:
pkt_out.code = RESET_ACK;
send_udp_pkt(OCTOCLOCK_UDP_CTRL_PORT, src, (void*)&pkt_out, sizeof(octoclock_packet_t));
wdt_enable(WDTO_30MS);
while(1);
return;
default:
return;
}
send_udp_pkt(OCTOCLOCK_UDP_CTRL_PORT, src, (void*)&pkt_out, sizeof(octoclock_packet_t));
}
}
void handle_udp_gpsdo_packet(
struct socket_address src, struct socket_address dst,
unsigned char *payload, int payload_len
){
const octoclock_packet_t *pkt_in = (octoclock_packet_t*)payload;
octoclock_packet_t pkt_out;
pkt_out.proto_ver = OCTOCLOCK_FW_COMPAT_NUM;
pkt_out.sequence = pkt_in->sequence;
if(pkt_in->proto_ver == OCTOCLOCK_FW_COMPAT_NUM){
switch(pkt_in->code){
case HOST_SEND_TO_GPSDO_CMD:
send_gpsdo_cmd((char*)pkt_in->data, pkt_in->len);
pkt_out.code = HOST_SEND_TO_GPSDO_ACK;
pkt_out.len = 0;
break;
case SEND_POOLSIZE_CMD:
pkt_out.code = SEND_POOLSIZE_ACK;
pkt_out.len = 0;
pkt_out.poolsize = POOLSIZE;
break;
case SEND_CACHE_STATE_CMD:
pkt_out.code = SEND_CACHE_STATE_ACK;
pkt_out.state = gpsdo_state;
break;
case SEND_GPSDO_CACHE_CMD:
pkt_out.code = SEND_GPSDO_CACHE_ACK;
pkt_out.state = gpsdo_state;
memcpy(pkt_out.data, gpsdo_buf, POOLSIZE);
break;
default:
return;
}
send_udp_pkt(OCTOCLOCK_UDP_GPSDO_PORT, src, (void*)&pkt_out, sizeof(octoclock_packet_t));
}
}
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