#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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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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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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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, int ttyfd, int confd, int timeout) {
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bool check_incoming(LINBUFS &lb, int ttyfd, 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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p[0].fd = ttyfd;
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p[0].fd = ttyfd;
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p[0].events = POLLIN | POLLERR;
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p[0].events = POLLIN | POLLERR;
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if (confd >= 0) {
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if (confd >= 0) {
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p[1].fd = confd;
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p[1].fd = confd;
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p[1].events = POLLIN | POLLRDHUP | POLLERR;
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p[1].events = POLLIN | POLLRDHUP | POLLERR;
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nfds = 2;
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nfds = 2;
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} else nfds = 1;
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} else 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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int nr = read(ttyfd, lb.m_buf, 256);
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int nr = read(ttyfd, lb.m_buf, 256);
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if (nr > 0) {
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if (nr > 0) {
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// printf("%d read from TTY\n", nr);
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// printf("%d read from TTY\n", nr);
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if (confd >= 0) {
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if (confd >= 0) {
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int nw;
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int nw;
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nw = write(confd, lb.m_buf, nr);
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nw = write(confd, lb.m_buf, nr);
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if(nw != nr) {
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if(nw != nr) {
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// This fails when the other end resets
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// This fails when the other end resets
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// the connection. Thus, we'll just
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// the connection. Thus, we'll just
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// kindly close the connection and skip
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// kindly close the connection and skip
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// the assert that once was at the end.
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// the assert that once was at the end.
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fprintf(stderr, "ERR: Could not write return string to buffer\n");
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fprintf(stderr, "ERR: Could not write return string to buffer\n");
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perror("O/S Err:");
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perror("O/S Err:");
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close(confd);
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close(confd);
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confd = -1;
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confd = -1;
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lb.m_connected = false;
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lb.m_connected = false;
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nfds = 1;
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nfds = 1;
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// assert(nw == nr);
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// assert(nw == nr);
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}
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}
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}
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}
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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')||(lb.m_iline[lb.m_ilen-1]=='\r')||(lb.m_ilen>=sizeof(lb.m_iline)-1)) {
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if (lb.m_ilen >= sizeof(lb.m_iline)-1)
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if (lb.m_ilen >= 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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} 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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if((nfds>1)&&(p[1].revents & POLLIN)) {
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if((nfds>1)&&(p[1].revents & POLLIN)) {
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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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// printf("Disconnect\n");
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// printf("Disconnect\n");
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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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// printf("%d read from SKT\n", nr);
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// printf("%d read from SKT\n", nr);
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int nw = 0, ttlw=0;
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int nw = 0, ttlw=0;
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errno = 0;
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errno = 0;
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do {
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do {
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nw = write(ttyfd, &lb.m_buf[ttlw], nr-ttlw);
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nw = write(ttyfd, &lb.m_buf[ttlw], nr-ttlw);
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if ((nw < 0)&&(errno == EAGAIN)) {
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if ((nw < 0)&&(errno == EAGAIN)) {
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nw = 0;
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nw = 0;
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usleep(10);
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usleep(10);
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} else if (nw < 0) {
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} else if (nw < 0) {
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fprintf(stderr, "ERR: %4d\n", errno);
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fprintf(stderr, "ERR: %4d\n", errno);
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perror("O/S Err: ");
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perror("O/S Err: ");
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assert(nw > 0);
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assert(nw > 0);
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break;
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break;
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}
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}
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// if (nw != nr-ttlw)
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// if (nw != nr-ttlw)
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// printf("Only wrote %d\n", nw);
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// printf("Only wrote %d\n", nw);
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ttlw += nw;
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ttlw += nw;
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} while(ttlw < nr);
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} while(ttlw < 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 >= sizeof(lb.m_oline)-1)) {
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if ((lb.m_oline[lb.m_olen-1]=='\n')||(lb.m_oline[lb.m_olen-1]=='\r')||(lb.m_olen >= sizeof(lb.m_oline)-1)) {
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if (lb.m_olen >= sizeof(lb.m_oline)-1)
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if (lb.m_olen >= 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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return (pv > 0);
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return (pv > 0);
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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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#ifndef LOW_SPEED
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#ifndef LOW_SPEED
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int skt = setup_listener(FPGAPORT);
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int skt = setup_listener(FPGAPORT);
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#else
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#else
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int skt = setup_listener(FPGAPORT+1);
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int skt = setup_listener(FPGAPORT+1);
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#endif
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#endif
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int tty;
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int tty;
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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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if ((argc > 1)&&(NULL != strstr(argv[1], "/ttyUSB"))) {
|
if ((argc > 1)&&(NULL != strstr(argv[1], "/ttyUSB"))) {
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// printf("Opening %s\n", argv[1]);
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// printf("Opening %s\n", argv[1]);
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tty = open(argv[1], O_RDWR | O_NONBLOCK);
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tty = open(argv[1], O_RDWR | O_NONBLOCK);
|
} else if (argc == 1) {
|
} else if (argc == 1) {
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const char *deftty = "/dev/ttyUSB2";
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const char *deftty = "/dev/ttyUSB2";
|
// printf("Opening %s\n", deftty);
|
// printf("Opening %s\n", deftty);
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tty = open(deftty, O_RDWR | O_NONBLOCK);
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tty = open(deftty, O_RDWR | O_NONBLOCK);
|
} else {
|
} else {
|
printf("Unknown argument: %s\n", argv[1]);
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printf("Unknown argument: %s\n", argv[1]);
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exit(-2);
|
exit(-2);
|
}
|
}
|
|
|
if (tty < 0) {
|
if (tty < 0) {
|
printf("Could not open tty\n");
|
printf("Could not open tty\n");
|
perror("O/S Err:");
|
perror("O/S Err:");
|
exit(-1);
|
exit(-1);
|
} else if (isatty(tty)) {
|
} else if (isatty(tty)) {
|
struct termios tb;
|
struct termios tb;
|
|
|
printf("Setting up TTY\n");
|
printf("Setting up TTY\n");
|
if (tcgetattr(tty, &tb) < 0) {
|
if (tcgetattr(tty, &tb) < 0) {
|
printf("Could not get TTY attributes\n");
|
printf("Could not get TTY attributes\n");
|
perror("O/S Err:");
|
perror("O/S Err:");
|
exit(-2);
|
exit(-2);
|
}
|
}
|
#ifndef LOW_SPEED
|
#ifndef LOW_SPEED
|
// Set 8 bits, 4MBaud, no parity, 1 stop bit
|
// Set 8 bits, 4MBaud, no parity, 1 stop bit
|
// const char set_highspeed[] = "00000600000PG00006";
|
// const char set_highspeed[] = "00000600000PG00006";
|
// Set 7 bits, 4MBaud, no parity, 1 stop bit
|
// Set 7 bits, 4MBaud, no parity, 1 stop bit
|
if (false) {
|
if (false) {
|
const char set_highspeed[] = "0000060G000P";
|
const char set_highspeed[] = "0000060G000P";
|
const char read_qspic[] = "G0000D";
|
const char read_qspic[] = "G0000D";
|
const char newline[] = "\n";
|
const char newline[] = "\n";
|
::write(tty, newline, sizeof(newline));
|
::write(tty, newline, sizeof(newline));
|
::write(tty, read_qspic, sizeof(read_qspic));
|
::write(tty, read_qspic, sizeof(read_qspic));
|
::write(tty, set_highspeed, sizeof(set_highspeed));
|
::write(tty, set_highspeed, sizeof(set_highspeed));
|
::write(tty, newline, sizeof(newline));
|
::write(tty, newline, sizeof(newline));
|
printf("< "); fflush(stdout);
|
printf("< "); fflush(stdout);
|
::write(STDOUT_FILENO, read_qspic, sizeof(read_qspic));
|
::write(STDOUT_FILENO, read_qspic, sizeof(read_qspic));
|
::write(STDOUT_FILENO, set_highspeed, sizeof(set_highspeed));
|
::write(STDOUT_FILENO, set_highspeed, sizeof(set_highspeed));
|
::write(STDOUT_FILENO, newline, sizeof(newline));
|
::write(STDOUT_FILENO, newline, sizeof(newline));
|
printf("\n"); usleep(400);
|
printf("\n"); usleep(400);
|
tcdrain(tty);
|
tcdrain(tty);
|
}
|
}
|
#endif
|
#endif
|
|
|
cfmakeraw(&tb); // Sets no parity, 8 bits, one stop bit
|
cfmakeraw(&tb); // Sets no parity, 8 bits, one stop bit
|
tb.c_cflag &= (~(CRTSCTS)); // Sets no parity, 8 bit
|
tb.c_cflag &= (~(CRTSCTS)); // Sets no parity, 8 bit
|
tb.c_cflag &= (~(CSTOPB)); // One stop bit
|
tb.c_cflag &= (~(CSTOPB)); // One stop bit
|
|
// #define LOW_SPEED
|
#ifndef LOW_SPEED
|
#ifndef LOW_SPEED
|
// Switch to 7 bit
|
// Switch to 7 bit
|
tb.c_cflag &= ~(CSIZE);
|
tb.c_cflag &= ~(CSIZE);
|
tb.c_cflag |= CS7;
|
tb.c_cflag |= CS7;
|
// And 4 MBaud
|
// And 4 MBaud
|
cfsetispeed(&tb, B4000000);
|
cfsetispeed(&tb, B1000000);
|
cfsetospeed(&tb, B4000000);
|
cfsetospeed(&tb, B1000000);
|
#else
|
#else
|
// Set the speed to 115200 baud
|
// Set the speed to 115200 baud
|
cfsetispeed(&tb, B115200);
|
cfsetispeed(&tb, B115200);
|
cfsetospeed(&tb, B115200);
|
cfsetospeed(&tb, B115200);
|
#endif
|
#endif
|
if (tcsetattr(tty, TCSANOW, &tb) < 0) {
|
if (tcsetattr(tty, TCSANOW, &tb) < 0) {
|
printf("Could not set any TTY attributes\n");
|
printf("Could not set any TTY attributes\n");
|
perror("O/S Err:");
|
perror("O/S Err:");
|
}
|
}
|
tcflow(tty, TCOON);
|
tcflow(tty, TCOON);
|
}
|
}
|
|
|
LINBUFS lb;
|
LINBUFS lb;
|
while(!done) {
|
while(!done) {
|
int con;
|
int con;
|
|
|
// Accept a connection before going on
|
// Accept a connection before going on
|
// Let's call poll(), so we can still read any
|
// Let's call poll(), so we can still read any
|
// tty messages even when not accepted
|
// tty messages even when not accepted
|
con = myaccept(skt, 50);
|
con = myaccept(skt, 50);
|
if (con >= 0) {
|
if (con >= 0) {
|
lb.m_connected = true;
|
lb.m_connected = true;
|
|
|
/*
|
/*
|
// 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);
|
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, tty, -1, 0))
|
while(check_incoming(lb, tty, -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, tty, con, -1);
|
check_incoming(lb, tty, con, -1);
|
}
|
}
|
}
|
}
|
|
|
printf("Closing our socket\n");
|
printf("Closing our socket\n");
|
close(skt);
|
close(skt);
|
}
|
}
|
|
|
|
|
