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/* -*- c++ -*- */
/*
* Copyright 2008,2009 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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, or (at your option)
* any later version.
*
* GNU Radio 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <msdd6000.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#define DEBUG(A) printf("=debug=> %s\n", A)
static void
optimize_socket(int socket);
/*
* Holds types that need autoconf help. They're here and not in the .h file because
* here we've got access to config.h
*/
class MSDD6000::detail {
public:
struct sockaddr_in d_sockaddr;
};
MSDD6000::MSDD6000(char* addr)
: d_detail(new MSDD6000::detail())
{
d_sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
optimize_socket(d_sock);
// set up remote sockaddr
// int s = inet_aton(addr, &d_adx);
d_detail->d_sockaddr.sin_family = AF_INET;
d_detail->d_sockaddr.sin_port = htons(10000);
int s = inet_aton(addr, &d_detail->d_sockaddr.sin_addr);
// set up local sockaddr
struct in_addr d_myadx;
struct sockaddr_in d_mysockaddr;
short int port = 10010;
d_myadx.s_addr = INADDR_ANY;
d_mysockaddr.sin_family = AF_INET;
d_mysockaddr.sin_port = htons(port);
memcpy(&d_mysockaddr.sin_addr.s_addr, &d_myadx.s_addr, sizeof(in_addr));
//d_sockaddr.sin_addr = INADDR_ANY;
s = bind(d_sock, (const sockaddr*) &d_mysockaddr, sizeof(d_mysockaddr));
// set default values
d_decim = 2;
d_ddc_gain = 2;
d_rf_attn = 0;
d_state = STATE_STOPPED;
}
MSDD6000::~MSDD6000()
{
// NOP
}
static void
optimize_socket(int socket){
#define BANDWIDTH 1000000000/8
#define DELAY 0.5
int ret;
int sock_buf_size = static_cast<int>(2*BANDWIDTH*DELAY);
char textbuf[512];
snprintf(textbuf, sizeof(textbuf), "%d", sock_buf_size);
printf("sock_buf_size = %d\n", sock_buf_size);
ret = setsockopt(socket, SOL_SOCKET, SO_SNDBUF,
&sock_buf_size, sizeof(sock_buf_size));
ret = setsockopt(socket, SOL_SOCKET, SO_RCVBUF,
&sock_buf_size, sizeof(sock_buf_size));
int uid = getuid();
if(uid!=0){
printf(" ****** COULD NOT OPTIMIZE SYSTEM NETWORK PARAMETERS BECAUSE YOU ARE NOT RUNNING AS ROOT *******\n ****** YOUR MSDD6000 RECIEVER PERFORMANCE IS GOING TO BE TERRIBLE *******\n");
return;
}
// SET UP SOME SYSTEM WIDE TCP SOCKET PARAMETERS
// FIXME seems like kind of a big hammer. Are you sure you need this?
FILE* fd = fopen("/proc/sys/net/core/netdev_max_backlog", "w");
if (fd){
fwrite("10000", 1, strlen("10000"), fd);
fclose(fd);
}
fd = fopen("/proc/sys/net/core/rmem_max", "w");
if (fd){
fwrite(textbuf, 1, strlen(textbuf), fd);
fclose(fd);
}
fd = fopen("/proc/sys/net/core/wmem_max", "w");
if (fd){
fwrite(textbuf, 1, strlen(textbuf), fd);
fclose(fd);
}
// just incase these were rejected before because of max sizes...
ret = setsockopt( socket, SOL_SOCKET, SO_SNDBUF,
(char *)&sock_buf_size, sizeof(sock_buf_size) );
ret = setsockopt( socket, SOL_SOCKET, SO_RCVBUF,
(char *)&sock_buf_size, sizeof(sock_buf_size) );
}
void MSDD6000::set_decim(int decim_pow2){
DEBUG("SETTING NEW DECIM");
d_decim = decim_pow2;
if(d_state==STATE_STARTED)
send_request(d_fc_mhz, d_rf_attn, d_ddc_gain, d_decim, d_offset_hz);
}
void MSDD6000::set_rf_attn(int attn){
DEBUG("SETTING NEW RF ATTN");
d_rf_attn = attn;
if(d_state==STATE_STARTED)
send_request(d_fc_mhz, d_rf_attn, d_ddc_gain, d_decim, d_offset_hz);
}
void MSDD6000::set_ddc_gain(int gain){
DEBUG("SETTING NEW DDC GAIN");
d_ddc_gain = gain;
if(d_state==STATE_STARTED)
send_request(d_fc_mhz, d_rf_attn, d_ddc_gain, d_decim, d_offset_hz);
}
void MSDD6000::set_fc(int center_mhz, int offset_hz){
DEBUG("SETTING NEW FC");
d_fc_mhz = center_mhz;
d_offset_hz = offset_hz;
if(d_state==STATE_STARTED)
send_request(d_fc_mhz, d_rf_attn, d_ddc_gain, d_decim, d_offset_hz);
}
void MSDD6000::start(){
send_request(d_fc_mhz, d_rf_attn, d_ddc_gain, d_decim, d_offset_hz);
d_state = STATE_STARTED;
}
void MSDD6000::stop(){
// new request with 0 decim tells it to halt
send_request(d_fc_mhz, d_rf_attn, d_ddc_gain, 0, d_offset_hz);
d_state = STATE_STOPPED;
}
void MSDD6000::send_request(float freq_mhz, float rf_attn, float ddc_gain, float ddc_dec, float ddc_offset_hz){
static char buff[512];
sprintf(buff, "%f %f %f %f %f\n",freq_mhz, rf_attn, ddc_gain, ddc_dec, ddc_offset_hz);
printf("sending: %s\n", buff);
int flags = 0;
sendto( d_sock, buff, strlen(buff)+1, flags,
(const sockaddr*)&(d_detail->d_sockaddr), sizeof(d_detail->d_sockaddr));
}
int MSDD6000::read(char* buf, int size){
int flags = 0;
return recv(d_sock, buf, size, flags);
}
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