////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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//
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//
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// Filename: netusb.cpp
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// Filename: netusb.cpp
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//
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//
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// Project: XuLA2 board
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// Project: XuLA2 board
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//
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//
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// Purpose: Forwards a XuLA2 board USB connection over a TCP socket, so
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// Purpose: Forwards a XuLA2 board USB connection over a TCP socket, so
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// a non-local computer can control the board.
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// a non-local computer can control the board.
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//
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//
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//
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//
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// Creator: Dan Gisselquist, Ph.D.
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// Creator: Dan Gisselquist, Ph.D.
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// Gisselquist Technology, LLC
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// Gisselquist Technology, LLC
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//
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//
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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//
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//
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// Copyright (C) 2015, Gisselquist Technology, LLC
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// Copyright (C) 2015, Gisselquist Technology, LLC
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//
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//
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// This program is free software (firmware): you can redistribute it and/or
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// This program is free software (firmware): you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as published
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// modify it under the terms of the GNU General Public License as published
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// by the Free Software Foundation, either version 3 of the License, or (at
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// by the Free Software Foundation, either version 3 of the License, or (at
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// your option) any later version.
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// your option) any later version.
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//
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//
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
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// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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// for more details.
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//
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//
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// License: GPL, v3, as defined and found on www.gnu.org,
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// License: GPL, v3, as defined and found on www.gnu.org,
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// http://www.gnu.org/licenses/gpl.html
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// http://www.gnu.org/licenses/gpl.html
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//
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//
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//
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//
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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//
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//
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//
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//
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#include <stdio.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <fcntl.h>
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#include <termios.h>
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#include <termios.h>
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#include <sys/socket.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <arpa/inet.h>
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#include <string.h>
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#include <string.h>
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#include <poll.h>
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#include <poll.h>
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#include <signal.h>
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#include <signal.h>
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#include <ctype.h>
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#include <ctype.h>
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#include <assert.h>
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#include <assert.h>
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#include <errno.h>
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#include <errno.h>
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#include "port.h"
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#include "port.h"
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#include "usbi.h"
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#include "usbi.h"
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void sigstop(int v) {
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void sigstop(int v) {
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fprintf(stderr, "SIGSTOP!!\n");
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fprintf(stderr, "SIGSTOP!!\n");
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exit(0);
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exit(0);
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}
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}
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void sighup(int v) {
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void sighup(int v) {
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fprintf(stderr, "SIGHUP!!\n");
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fprintf(stderr, "SIGHUP!!\n");
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exit(0);
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exit(0);
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}
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}
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void sigint(int v) {
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void sigint(int v) {
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fprintf(stderr, "SIGINT!!\n");
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fprintf(stderr, "SIGINT!!\n");
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exit(0);
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exit(0);
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}
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}
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void sigsegv(int v) {
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void sigsegv(int v) {
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fprintf(stderr, "SIGSEGV!!\n");
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fprintf(stderr, "SIGSEGV!!\n");
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exit(0);
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exit(0);
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}
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}
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void sigbus(int v) {
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void sigbus(int v) {
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fprintf(stderr, "SIGBUS!!\n");
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fprintf(stderr, "SIGBUS!!\n");
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exit(0);
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exit(0);
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}
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}
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void sigpipe(int v) {
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void sigpipe(int v) {
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fprintf(stderr, "SIGPIPE!!\n");
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fprintf(stderr, "SIGPIPE!!\n");
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exit(0);
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exit(0);
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}
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}
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int setup_listener(const int port) {
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int setup_listener(const int port) {
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int skt;
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int skt;
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struct sockaddr_in my_addr;
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struct sockaddr_in my_addr;
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printf("Listening on port %d\n", port);
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printf("Listening on port %d\n", port);
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|
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skt = socket(AF_INET, SOCK_STREAM, 0);
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skt = socket(AF_INET, SOCK_STREAM, 0);
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if (skt < 0) {
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if (skt < 0) {
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perror("Could not allocate socket: ");
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perror("Could not allocate socket: ");
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exit(-1);
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exit(-1);
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}
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}
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// Set the reuse address option
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// Set the reuse address option
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{
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{
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int optv = 1, er;
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int optv = 1, er;
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er = setsockopt(skt, SOL_SOCKET, SO_REUSEADDR, &optv, sizeof(optv));
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er = setsockopt(skt, SOL_SOCKET, SO_REUSEADDR, &optv, sizeof(optv));
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if (er != 0) {
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if (er != 0) {
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perror("SockOpt Err:");
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perror("SockOpt Err:");
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exit(-1);
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exit(-1);
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}
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}
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}
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}
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memset(&my_addr, 0, sizeof(struct sockaddr_in)); // clear structure
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memset(&my_addr, 0, sizeof(struct sockaddr_in)); // clear structure
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my_addr.sin_family = AF_INET;
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my_addr.sin_family = AF_INET;
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my_addr.sin_addr.s_addr = htonl(INADDR_ANY);
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my_addr.sin_addr.s_addr = htonl(INADDR_ANY);
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my_addr.sin_port = htons(port);
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my_addr.sin_port = htons(port);
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|
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if (bind(skt, (struct sockaddr *)&my_addr, sizeof(my_addr))!=0) {
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if (bind(skt, (struct sockaddr *)&my_addr, sizeof(my_addr))!=0) {
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perror("BIND FAILED:");
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perror("BIND FAILED:");
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exit(-1);
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exit(-1);
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}
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}
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if (listen(skt, 1) != 0) {
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if (listen(skt, 1) != 0) {
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perror("Listen failed:");
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perror("Listen failed:");
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exit(-1);
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exit(-1);
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}
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}
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return skt;
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return skt;
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}
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}
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class LINBUFS {
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class LINBUFS {
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public:
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public:
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char m_iline[512], m_oline[512];
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char m_iline[512], m_oline[512];
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char m_buf[256];
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char m_buf[256];
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int m_ilen, m_olen;
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int m_ilen, m_olen;
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bool m_connected;
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bool m_connected;
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LINBUFS(void) {
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LINBUFS(void) {
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m_ilen = 0; m_olen = 0; m_connected = false;
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m_ilen = 0; m_olen = 0; m_connected = false;
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}
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}
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};
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};
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bool check_incoming(LINBUFS &lb, USBI *usbp, int confd, int timeout) {
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bool check_incoming(LINBUFS &lb, USBI *usbp, int confd, int timeout) {
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struct pollfd p[2];
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struct pollfd p[2];
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int pv, nfds;
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int pv, nfds;
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if (confd >= 0) {
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if (confd >= 0) {
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// Only do this if we currently have a network connection
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// Only do this if we currently have a network connection
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p[0].fd = confd;
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p[0].fd = confd;
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p[0].events = POLLIN | POLLRDHUP | POLLERR;
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p[0].events = POLLIN | POLLRDHUP | POLLERR;
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nfds = 1;
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nfds = 1;
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if ((pv=poll(p, nfds, timeout)) < 0) {
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if ((pv=poll(p, nfds, timeout)) < 0) {
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perror("Poll Failed! O/S Err:");
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perror("Poll Failed! O/S Err:");
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exit(-1);
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exit(-1);
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}
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}
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if (p[0].revents & POLLIN) {
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if (p[0].revents & POLLIN) {
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/*
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/*
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else if (p[0].revents)
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else if (p[0].revents)
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printf("UNKNOWN TTY EVENT: %d\n", p[0].revents);
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printf("UNKNOWN TTY EVENT: %d\n", p[0].revents);
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*/
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*/
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int nr = read(confd, lb.m_buf, 256);
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int nr = read(confd, lb.m_buf, 256);
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if (nr == 0) {
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if (nr == 0) {
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lb.m_connected = false;
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lb.m_connected = false;
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if (lb.m_olen > 0) {
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if (lb.m_olen > 0) {
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lb.m_oline[lb.m_olen] = '\0';
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lb.m_oline[lb.m_olen] = '\0';
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printf("< %s\n", lb.m_oline);
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printf("< %s\n", lb.m_oline);
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} lb.m_olen = 0;
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} lb.m_olen = 0;
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close(confd);
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close(confd);
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} else if (nr > 0) {
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} else if (nr > 0) {
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usbp->write(lb.m_buf, nr);
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usbp->write(lb.m_buf, nr);
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} for(int i=0; i<nr; i++) {
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} for(int i=0; i<nr; i++) {
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lb.m_oline[lb.m_olen++] = lb.m_buf[i];
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lb.m_oline[lb.m_olen++] = lb.m_buf[i];
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assert(lb.m_buf[i] != '\0');
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assert(lb.m_buf[i] != '\0');
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if ((lb.m_oline[lb.m_olen-1]=='\n')||(lb.m_oline[lb.m_olen-1]=='\r')||(lb.m_olen >= (int)sizeof(lb.m_oline)-1)) {
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if ((lb.m_oline[lb.m_olen-1]=='\n')
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||(lb.m_oline[lb.m_olen-1]=='\r')
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||(lb.m_olen >= (int)sizeof(lb.m_oline)-1)) {
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if (lb.m_olen >= (int)sizeof(lb.m_oline)-1)
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if (lb.m_olen >= (int)sizeof(lb.m_oline)-1)
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lb.m_oline[lb.m_olen] = '\0';
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lb.m_oline[lb.m_olen] = '\0';
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else
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else
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lb.m_oline[lb.m_olen-1] = '\0';
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lb.m_oline[lb.m_olen-1] = '\0';
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if (lb.m_olen > 1)
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if (lb.m_olen > 1)
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printf("< %s\n", lb.m_oline);
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printf("< %s\n", lb.m_oline);
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lb.m_olen = 0;
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lb.m_olen = 0;
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}
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}
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}
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}
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} else if ((nfds>1)&&(p[1].revents)) {
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} else if ((nfds>1)&&(p[1].revents)) {
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printf("UNKNOWN SKT EVENT: %d\n", p[1].revents);
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printf("UNKNOWN SKT EVENT: %d\n", p[1].revents);
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}
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}
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}
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}
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if (usbp->poll(2)) {
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if (usbp->poll(2)) {
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int nr, nrn;
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int nr, nrn;
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|
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nr = nrn = usbp->read(lb.m_buf,1,2);
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nr = nrn = usbp->read(lb.m_buf,1,2);
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while((nrn>0)&&(nr<255)&&((lb.m_buf[0]&0x80)==0)&&(lb.m_buf[0]>0x10)) {
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while((nrn>0)&&(nr<255)&&((lb.m_buf[0]&0x80)==0)&&(lb.m_buf[0]>0x10)) {
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nrn = usbp->read(&lb.m_buf[nr],1,2);
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nrn = usbp->read(&lb.m_buf[nr],1,2);
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nr += nrn;
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nr += nrn;
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} if ((nr > 0)&&(confd >= 0)) {
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} if ((nr > 0)&&(confd >= 0)) {
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// Return our result if we have a network
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// Return our result if we have a network
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// connection
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// connection
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write(confd, lb.m_buf, nr);
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write(confd, lb.m_buf, nr);
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} for(int i=0; i<nr; i++) {
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} for(int i=0; i<nr; i++) {
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lb.m_iline[lb.m_ilen++] = lb.m_buf[i];
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lb.m_iline[lb.m_ilen++] = lb.m_buf[i];
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if ((lb.m_iline[lb.m_ilen-1]=='\n')||(lb.m_iline[lb.m_ilen-1]=='\r')||(lb.m_ilen>=sizeof(lb.m_iline)-1)) {
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if ((lb.m_iline[lb.m_ilen-1]=='\n')
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if (lb.m_ilen >= sizeof(lb.m_iline)-1)
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||(lb.m_iline[lb.m_ilen-1]=='\r')
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||(lb.m_ilen >= (int)sizeof(lb.m_iline)-1)) {
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if (lb.m_ilen >= (int)sizeof(lb.m_iline)-1)
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lb.m_iline[lb.m_ilen] = '\0';
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lb.m_iline[lb.m_ilen] = '\0';
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else
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else
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lb.m_iline[lb.m_ilen-1] = '\0';
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lb.m_iline[lb.m_ilen-1] = '\0';
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if (lb.m_ilen > 1)
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if (lb.m_ilen > 1)
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printf("%c %s\n",
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printf("%c %s\n",
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(confd>=0)?'>':'#', lb.m_iline);
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(confd>=0)?'>':'#', lb.m_iline);
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lb.m_ilen = 0;
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lb.m_ilen = 0;
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}
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}
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}
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}
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}
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}
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|
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return (pv > 0);
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return (pv > 0);
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}
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}
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|
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int myaccept(int skt, int timeout) {
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int myaccept(int skt, int timeout) {
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int con = -1;
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int con = -1;
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struct pollfd p[1];
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struct pollfd p[1];
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int pv;
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int pv;
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|
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p[0].fd = skt;
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p[0].fd = skt;
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p[0].events = POLLIN | POLLERR;
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p[0].events = POLLIN | POLLERR;
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if ((pv=poll(p, 1, timeout)) < 0) {
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if ((pv=poll(p, 1, timeout)) < 0) {
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perror("Poll Failed! O/S Err:");
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perror("Poll Failed! O/S Err:");
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exit(-1);
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exit(-1);
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} if (p[0].revents & POLLIN) {
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} if (p[0].revents & POLLIN) {
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con = accept(skt, 0, 0);
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con = accept(skt, 0, 0);
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if (con < 0) {
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if (con < 0) {
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perror("Accept failed! O/S Err:");
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perror("Accept failed! O/S Err:");
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exit(-1);
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exit(-1);
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}
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}
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} return con;
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} return con;
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}
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}
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|
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int main(int argc, char **argv) {
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int main(int argc, char **argv) {
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// First, accept a network connection
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// First, accept a network connection
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int skt = setup_listener(FPGAPORT);
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int skt = setup_listener(FPGAPORT);
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USBI *usbp;
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USBI *usbp;
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bool done = false;
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bool done = false;
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|
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signal(SIGSTOP, sigstop);
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signal(SIGSTOP, sigstop);
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signal(SIGBUS, sigbus);
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signal(SIGBUS, sigbus);
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signal(SIGSEGV, sigsegv);
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signal(SIGSEGV, sigsegv);
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signal(SIGPIPE, SIG_IGN);
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signal(SIGPIPE, SIG_IGN);
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signal(SIGINT, sigint);
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signal(SIGINT, sigint);
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signal(SIGHUP, sighup);
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signal(SIGHUP, sighup);
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|
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usbp = new USBI();
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usbp = new USBI();
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|
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LINBUFS lb;
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LINBUFS lb;
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while(!done) {
|
while(!done) {
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int con;
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int con;
|
|
|
// Accept a connection before going on
|
// Accept a connection before going on
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// Let's call poll(), so we can still read any
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// Let's call poll(), so we can still read any
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// tty messages even when not accepted
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// tty messages even when not accepted
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con = myaccept(skt, 50);
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con = myaccept(skt, 50);
|
if (con >= 0) {
|
if (con >= 0) {
|
lb.m_connected = true;
|
lb.m_connected = true;
|
|
|
/*
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/*
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// Set our new socket as non-blocking
|
// Set our new socket as non-blocking
|
int flags = fcntl(fd, F_GETFL, 0);
|
int flags = fcntl(fd, F_GETFL, 0);
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flags |= O_NONBLOCK;
|
flags |= O_NONBLOCK;
|
fcntl(fd, F_SETFL, flags);
|
fcntl(fd, F_SETFL, flags);
|
*/
|
*/
|
|
|
// printf("Received a new connection\n");
|
// printf("Received a new connection\n");
|
}
|
}
|
|
|
// Flush any buffer within the TTY
|
// Flush any buffer within the TTY
|
while(check_incoming(lb, usbp, -1, 0))
|
while(check_incoming(lb, usbp, -1, 0))
|
;
|
;
|
|
|
// Now, process that connection until it's gone
|
// Now, process that connection until it's gone
|
while(lb.m_connected) {
|
while(lb.m_connected) {
|
check_incoming(lb, usbp, con, -1);
|
check_incoming(lb, usbp, con, -1);
|
}
|
}
|
}
|
}
|
|
|
printf("Closing our socket\n");
|
printf("Closing our socket\n");
|
close(skt);
|
close(skt);
|
}
|
}
|
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