diff options
Diffstat (limited to 'gr-blocks/lib/tuntap_pdu_impl.cc')
| -rw-r--r-- | gr-blocks/lib/tuntap_pdu_impl.cc | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/gr-blocks/lib/tuntap_pdu_impl.cc b/gr-blocks/lib/tuntap_pdu_impl.cc deleted file mode 100644 index 048c33c392..0000000000 --- a/gr-blocks/lib/tuntap_pdu_impl.cc +++ /dev/null @@ -1,171 +0,0 @@ -/* -*- c++ -*- */ -/* - * Copyright 2013 Free Software Foundation, Inc. - * - * This file is part of GNU Radio - * - * SPDX-License-Identifier: GPL-3.0-or-later - * - */ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include "tuntap_pdu_impl.h" -#include <gnuradio/blocks/pdu.h> -#include <gnuradio/io_signature.h> -#include <boost/format.hpp> - -#include <fcntl.h> -#include <sys/stat.h> -#include <sys/types.h> - -#if (defined(linux) || defined(__linux) || defined(__linux__)) -#include <arpa/inet.h> -#include <linux/if.h> -#include <sys/ioctl.h> -#endif - -namespace gr { -namespace blocks { - -tuntap_pdu::sptr tuntap_pdu::make(std::string dev, int MTU, bool istunflag) -{ -#if (defined(linux) || defined(__linux) || defined(__linux__)) - return gnuradio::make_block_sptr<tuntap_pdu_impl>(dev, MTU, istunflag); -#else - throw std::runtime_error("tuntap_pdu not implemented on this platform"); -#endif -} - -#if (defined(linux) || defined(__linux) || defined(__linux__)) -tuntap_pdu_impl::tuntap_pdu_impl(std::string dev, int MTU, bool istunflag) - : block("tuntap_pdu", io_signature::make(0, 0, 0), io_signature::make(0, 0, 0)), - stream_pdu_base(istunflag ? MTU : MTU + 14), - d_dev(dev), - d_istunflag(istunflag) -{ - // make the tuntap - char dev_cstr[IFNAMSIZ]; - memset(dev_cstr, 0x00, IFNAMSIZ); - strncpy(dev_cstr, dev.c_str(), IFNAMSIZ); - dev_cstr[IFNAMSIZ - 1] = '\0'; - - bool istun = d_istunflag; - if (istun) { - d_fd = tun_alloc(dev_cstr, (IFF_TUN | IFF_NO_PI)); - } else { - d_fd = tun_alloc(dev_cstr, (IFF_TAP | IFF_NO_PI)); - } - - if (d_fd <= 0) - throw std::runtime_error( - "gr::tuntap_pdu::make: tun_alloc failed (are you running as root?)"); - - int err = set_mtu(dev_cstr, MTU); - if (err < 0) { - std::ostringstream msg; - msg << boost::format("failed to set MTU to %d. You should use ifconfig to set " - "the MTU. E.g., `$ sudo ifconfig %s mtu %d`") % - MTU % dev % MTU; - GR_LOG_ERROR(d_logger, msg.str()); - } - - - std::cout << boost::format("Allocated virtual ethernet interface: %s\n" - "You must now use ifconfig to set its IP address. E.g.,\n" - " $ sudo ifconfig %s 192.168.200.1\n" - "Be sure to use a different address in the same subnet " - "for each machine.\n") % - dev % dev - << std::endl; - - // set up output message port - message_port_register_out(pdu::pdu_port_id()); - start_rxthread(this, pdu::pdu_port_id()); - - // set up input message port - message_port_register_in(pdu::pdu_port_id()); - set_msg_handler(pdu::pdu_port_id(), [this](pmt::pmt_t msg) { this->send(msg); }); -} - -int tuntap_pdu_impl::tun_alloc(char* dev, int flags) -{ - struct ifreq ifr; - int fd, err; - const char* clonedev = "/dev/net/tun"; - - /* Arguments taken by the function: - * - * char *dev: the name of an interface (or '\0'). MUST have enough - * space to hold the interface name if '\0' is passed - * int flags: interface flags (eg, IFF_TUN etc.) - */ - - /* open the clone device */ - if ((fd = open(clonedev, O_RDWR)) < 0) - return fd; - - /* preparation of the struct ifr, of type "struct ifreq" */ - memset(&ifr, 0, sizeof(ifr)); - - ifr.ifr_flags = flags; /* IFF_TUN or IFF_TAP, plus maybe IFF_NO_PI */ - - /* if a device name was specified, put it in the structure; otherwise, - * the kernel will try to allocate the "next" device of the - * specified type - */ - if (*dev) - strncpy(ifr.ifr_name, dev, IFNAMSIZ - 1); - - /* try to create the device */ - if ((err = ioctl(fd, TUNSETIFF, (void*)&ifr)) < 0) { - close(fd); - return err; - } - - /* if the operation was successful, write back the name of the - * interface to the variable "dev", so the caller can know - * it. Note that the caller MUST reserve space in *dev (see calling - * code below) - */ - strcpy(dev, ifr.ifr_name); - - /* this is the special file descriptor that the caller will use to talk - * with the virtual interface - */ - return fd; -} - -int tuntap_pdu_impl::set_mtu(const char* dev, int MTU) -{ - struct ifreq ifr; - int sfd, err; - - /* MTU must be set by passing a socket fd to ioctl; - * create an arbitrary socket for this purpose - */ - if ((sfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) - return sfd; - - /* preparation of the struct ifr, of type "struct ifreq" */ - memset(&ifr, 0, sizeof(ifr)); - strncpy(ifr.ifr_name, dev, IFNAMSIZ); - ifr.ifr_name[IFNAMSIZ - 1] = '\0'; - ifr.ifr_addr.sa_family = AF_INET; /* address family */ - ifr.ifr_mtu = MTU; - - /* try to set MTU */ - if ((err = ioctl(sfd, SIOCSIFMTU, (void*)&ifr)) < 0) { - close(sfd); - return err; - } - - close(sfd); - return MTU; -} -#endif - -} /* namespace blocks */ -} /* namespace gr */ |