/* * Copyright (c) 2018-2020, Andreas Kling * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include int main(int argc, char** argv) { const char* value_ipv4 = nullptr; const char* value_adapter = nullptr; const char* value_gateway = nullptr; const char* value_mask = nullptr; Core::ArgsParser args_parser; args_parser.set_general_help("Display or modify the configuration of each network interface."); args_parser.add_option(value_ipv4, "Set the IP address of the selected network", "ipv4", 'i', "The new IP of the network"); args_parser.add_option(value_adapter, "Select a specific network adapter to configure", "adapter", 'a', "The name of a network adapter"); args_parser.add_option(value_gateway, "Set the default gateway of the selected network", "gateway", 'g', "The new IP of the gateway"); args_parser.add_option(value_mask, "Set the network mask of the selected network", "mask", 'm', "The new network mask"); args_parser.parse(argc, argv); if (!value_ipv4 && !value_adapter && !value_gateway && !value_mask) { auto file = Core::File::construct("/proc/net/adapters"); if (!file->open(Core::IODevice::ReadOnly)) { fprintf(stderr, "Error: %s\n", file->error_string()); return 1; } auto file_contents = file->read_all(); auto json = JsonValue::from_string(file_contents); VERIFY(json.has_value()); json.value().as_array().for_each([](auto& value) { auto if_object = value.as_object(); auto name = if_object.get("name").to_string(); auto class_name = if_object.get("class_name").to_string(); auto mac_address = if_object.get("mac_address").to_string(); auto ipv4_address = if_object.get("ipv4_address").to_string(); auto gateway = if_object.get("ipv4_gateway").to_string(); auto netmask = if_object.get("ipv4_netmask").to_string(); auto packets_in = if_object.get("packets_in").to_u32(); auto bytes_in = if_object.get("bytes_in").to_u32(); auto packets_out = if_object.get("packets_out").to_u32(); auto bytes_out = if_object.get("bytes_out").to_u32(); auto mtu = if_object.get("mtu").to_u32(); printf("%s:\n", name.characters()); printf("\tmac: %s\n", mac_address.characters()); printf("\tipv4: %s\n", ipv4_address.characters()); printf("\tnetmask: %s\n", netmask.characters()); printf("\tgateway: %s\n", gateway.characters()); printf("\tclass: %s\n", class_name.characters()); printf("\tRX: %u packets %u bytes (%s)\n", packets_in, bytes_in, human_readable_size(bytes_in).characters()); printf("\tTX: %u packets %u bytes (%s)\n", packets_out, bytes_out, human_readable_size(bytes_out).characters()); printf("\tMTU: %u\n", mtu); printf("\n"); }); } else { if (!value_adapter) { fprintf(stderr, "No network adapter was specified.\n"); return 1; } String ifname = value_adapter; if (value_ipv4) { auto address = IPv4Address::from_string(value_ipv4); if (!address.has_value()) { fprintf(stderr, "Invalid IPv4 address: '%s'\n", value_ipv4); return 1; } int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP); if (fd < 0) { perror("socket"); return 1; } struct ifreq ifr; memset(&ifr, 0, sizeof(ifr)); bool fits = ifname.copy_characters_to_buffer(ifr.ifr_name, IFNAMSIZ); if (!fits) { fprintf(stderr, "Interface name '%s' is too long\n", ifname.characters()); return 1; } ifr.ifr_addr.sa_family = AF_INET; ((sockaddr_in&)ifr.ifr_addr).sin_addr.s_addr = address.value().to_in_addr_t(); int rc = ioctl(fd, SIOCSIFADDR, &ifr); if (rc < 0) { perror("ioctl(SIOCSIFADDR)"); return 1; } } if (value_mask) { auto address = IPv4Address::from_string(value_mask); if (!address.has_value()) { fprintf(stderr, "Invalid IPv4 mask: '%s'\n", value_mask); return 1; } int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP); if (fd < 0) { perror("socket"); return 1; } struct ifreq ifr; memset(&ifr, 0, sizeof(ifr)); bool fits = ifname.copy_characters_to_buffer(ifr.ifr_name, IFNAMSIZ); if (!fits) { fprintf(stderr, "Interface name '%s' is too long\n", ifname.characters()); return 1; } ifr.ifr_netmask.sa_family = AF_INET; ((sockaddr_in&)ifr.ifr_netmask).sin_addr.s_addr = address.value().to_in_addr_t(); int rc = ioctl(fd, SIOCSIFNETMASK, &ifr); if (rc < 0) { perror("ioctl(SIOCSIFNETMASK)"); return 1; } } if (value_gateway) { auto address = IPv4Address::from_string(value_gateway); int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP); if (fd < 0) { perror("socket"); return 1; } struct rtentry rt; memset(&rt, 0, sizeof(rt)); rt.rt_dev = const_cast(ifname.characters()); rt.rt_gateway.sa_family = AF_INET; ((sockaddr_in&)rt.rt_gateway).sin_addr.s_addr = address.value().to_in_addr_t(); rt.rt_flags = RTF_UP | RTF_GATEWAY; int rc = ioctl(fd, SIOCADDRT, &rt); if (rc < 0) { perror("ioctl(SIOCADDRT)"); return 1; } } } return 0; }