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tunslip6: support MTU configuration, XON/XOFF flow control, and baudrates up
to 1000000 mbps
This commit is contained in:
Simon Duquennoy
parent
9171ba17fc
commit
55d81ddd3a
@ -62,7 +62,7 @@ const char *netmask;
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int slipfd = 0;
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uint16_t basedelay=0,delaymsec=0;
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uint32_t startsec,startmsec,delaystartsec,delaystartmsec;
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int timestamp = 0, flowcontrol=0, showprogress=0;
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int timestamp = 0, flowcontrol=0, showprogress=0, flowcontrol_xonxoff=0;
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int ssystem(const char *fmt, ...)
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__attribute__((__format__ (__printf__, 1, 2)));
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@ -75,6 +75,10 @@ void slip_send_char(int fd, unsigned char c);
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char tundev[1024] = { "" };
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/* IPv6 required minimum MTU */
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#define MIN_DEVMTU 1500
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int devmtu = MIN_DEVMTU;
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int
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ssystem(const char *fmt, ...) __attribute__((__format__ (__printf__, 1, 2)));
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@ -91,11 +95,15 @@ ssystem(const char *fmt, ...)
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return system(cmd);
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}
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#define SLIP_END 0300
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#define SLIP_ESC 0333
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#define SLIP_ESC_END 0334
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#define SLIP_ESC_ESC 0335
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#define SLIP_END 0300
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#define SLIP_ESC 0333
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#define SLIP_ESC_END 0334
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#define SLIP_ESC_ESC 0335
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#define SLIP_ESC_XON 0336
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#define SLIP_ESC_XOFF 0337
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#define XON 17
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#define XOFF 19
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/* get sockaddr, IPv4 or IPv6: */
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void *
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@ -287,6 +295,12 @@ serial_to_tun(FILE *inslip, int outfd)
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case SLIP_ESC_ESC:
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c = SLIP_ESC;
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break;
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case SLIP_ESC_XON:
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c = XON;
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break;
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case SLIP_ESC_XOFF:
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c = XOFF;
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break;
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}
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/* FALLTHROUGH */
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default:
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@ -330,6 +344,22 @@ slip_send_char(int fd, unsigned char c)
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slip_send(fd, SLIP_ESC);
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slip_send(fd, SLIP_ESC_ESC);
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break;
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case XON:
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if(flowcontrol_xonxoff) {
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slip_send(fd, SLIP_ESC);
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slip_send(fd, SLIP_ESC_XON);
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} else {
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slip_send(fd, c);
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}
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break;
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case XOFF:
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if(flowcontrol_xonxoff) {
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slip_send(fd, SLIP_ESC);
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slip_send(fd, SLIP_ESC_XOFF);
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} else {
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slip_send(fd, c);
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}
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break;
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default:
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slip_send(fd, c);
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break;
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@ -415,6 +445,22 @@ write_to_serial(int outfd, void *inbuf, int len)
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slip_send(outfd, SLIP_ESC);
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slip_send(outfd, SLIP_ESC_ESC);
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break;
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case XON:
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if(flowcontrol_xonxoff) {
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slip_send(outfd, SLIP_ESC);
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slip_send(outfd, SLIP_ESC_XON);
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} else {
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slip_send(outfd, p[i]);
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}
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break;
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case XOFF:
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if(flowcontrol_xonxoff) {
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slip_send(outfd, SLIP_ESC);
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slip_send(outfd, SLIP_ESC_XOFF);
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} else {
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slip_send(outfd, p[i]);
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}
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break;
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default:
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slip_send(outfd, p[i]);
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break;
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@ -467,6 +513,12 @@ stty_telos(int fd)
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tty.c_cflag |= CRTSCTS;
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else
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tty.c_cflag &= ~CRTSCTS;
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tty.c_iflag &= ~IXON;
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if(flowcontrol_xonxoff) {
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tty.c_iflag |= IXOFF | IXANY;
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} else {
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tty.c_iflag &= ~IXOFF & ~IXANY;
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}
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tty.c_cflag &= ~HUPCL;
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tty.c_cflag &= ~CLOCAL;
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@ -609,7 +661,7 @@ ifconf(const char *tundev, const char *ipaddr)
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{
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#ifdef linux
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if (timestamp) stamptime();
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ssystem("ifconfig %s inet `hostname` up", tundev);
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ssystem("ifconfig %s inet `hostname` mtu %d up", tundev, devmtu);
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if (timestamp) stamptime();
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ssystem("ifconfig %s add %s", tundev, ipaddr);
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@ -670,7 +722,7 @@ ifconf(const char *tundev, const char *ipaddr)
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prefix = "64";
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}
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if (timestamp) stamptime();
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ssystem("ifconfig %s inet6 up", tundev );
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ssystem("ifconfig %s inet6 mtu %d up", tundev, devmtu);
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if (timestamp) stamptime();
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ssystem("ifconfig %s inet6 %s add", tundev, ipaddr );
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if (timestamp) stamptime();
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@ -679,7 +731,7 @@ ifconf(const char *tundev, const char *ipaddr)
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}
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#else
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if (timestamp) stamptime();
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ssystem("ifconfig %s inet `hostname` %s up", tundev, ipaddr);
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ssystem("ifconfig %s inet `hostname` %s mtu %d up", tundev, ipaddr, devmtu);
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if (timestamp) stamptime();
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ssystem("sysctl -w net.inet.ip.forwarding=1");
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#endif /* !linux */
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@ -708,7 +760,7 @@ main(int argc, char **argv)
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prog = argv[0];
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setvbuf(stdout, NULL, _IOLBF, 0); /* Line buffered output. */
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while((c = getopt(argc, argv, "B:HILPhs:t:v::d::a:p:T")) != -1) {
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while((c = getopt(argc, argv, "B:HILPhXM:s:t:v::d::a:p:T")) != -1) {
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switch(c) {
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case 'B':
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baudrate = atoi(optarg);
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@ -718,10 +770,20 @@ main(int argc, char **argv)
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flowcontrol=1;
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break;
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case 'X':
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flowcontrol_xonxoff=1;
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break;
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case 'L':
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timestamp=1;
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break;
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case 'M':
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devmtu=atoi(optarg);
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if(devmtu < MIN_DEVMTU) {
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devmtu = MIN_DEVMTU;
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}
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case 'P':
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showprogress=1;
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break;
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@ -782,8 +844,10 @@ fprintf(stderr," -B baudrate 9600,19200,38400,57600,115200 (default),230400\n
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#endif
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fprintf(stderr," -H Hardware CTS/RTS flow control (default disabled)\n");
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fprintf(stderr," -I Inquire IP address\n");
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fprintf(stderr," -X Software XON/XOFF flow control (default disabled)\n");
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fprintf(stderr," -L Log output format (adds time stamps)\n");
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fprintf(stderr," -s siodev Serial device (default /dev/ttyUSB0)\n");
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fprintf(stderr," -M Interface MTU (default and min: 1280)\n");
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fprintf(stderr," -T Make tap interface (default is tun interface)\n");
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fprintf(stderr," -t tundev Name of interface (default tap0 or tun0)\n");
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fprintf(stderr," -v[level] Verbosity level\n");
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@ -836,9 +900,18 @@ exit(1);
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case 460800:
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b_rate = B460800;
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break;
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case 500000:
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b_rate = B500000;
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break;
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case 576000:
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b_rate = B576000;
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break;
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case 921600:
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b_rate = B921600;
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break;
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case 1000000:
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b_rate = B1000000;
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break;
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#endif
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default:
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err(1, "unknown baudrate %d", baudrate);
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