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#include <arpa/inet.h>
#include <cstring>
#include <stdexcept>
#include <unistd.h>
#include <cstdio>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <errno.h>
#include <thread>
#include "i2ctcpv1.h"
#include "sock.h"
#include "rl.h"
#include "i2c.h"
using std::logic_error;
using std::thread;
PBSocket::PBSocket() { }
PBSocket::PBSocket(const char * addr, uint16_t port) : PBSocket() {
set_server(addr, port);
}
PBSocket::~PBSocket() {
// stop TCP listen thread
if (_thread != nullptr) {
_thread->detach();
delete _thread;
}
sock_close();
}
void PBSocket::set_server(const char * addr, uint16_t port) {
_addr = addr;
_port = port;
}
void PBSocket::sock_connect() {
if (_addr == NULL) throw logic_error("no server address defined");
if (_port == 0) throw logic_error("no server port defined");
if (_thread != nullptr) throw logic_error("already connected");
rl_printf("connecting to %s on port %d...\n", _addr, _port);
_fd = socket(AF_INET, SOCK_STREAM, 0);
if (_fd < 0) throw logic_error("socket create failed");
struct sockaddr_in server = {
.sin_family = AF_INET,
.sin_port = htons(_port),
.sin_addr = {
.s_addr = inet_addr(_addr),
},
};
int ret = connect(_fd, (struct sockaddr*) &server, sizeof(server));
if (ret != 0) throw logic_error(strerror(errno));
this->_thread = new thread(&PBSocket::sock_task, this);
}
void PBSocket::sock_close() {
if (_fd < 0) return; // already closed
close(_fd);
_fd = -1;
}
void PBSocket::send(const char * buf, size_t buf_sz) {
write(_fd, buf, buf_sz);
}
void PBSocket::sock_task() {
i2ctcp_msg_t input;
i2ctcp_read_reset(&input);
while(1) {
char buf[80];
ssize_t bytes = read(_fd, buf, sizeof(buf));
if (bytes == -1) {
rl_printf("error: %s (%d)\n", strerror(errno), errno);
break;
}
// skip empty frames
if (bytes == 0) continue;
int ret = i2ctcp_read(&input, buf, bytes);
// header read error
if (ret < 0) {
rl_printf("i2ctcp_read error!\n");
break;
}
// continue reading if more bytes needed...
if (ret > 0) continue;
// message read completely!
i2c_recv(input.addr, input.data, input.length);
free(input.data);
}
sock_close();
}
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