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Userland: Set the mask of a network adapter with ifconfig (#1388)
A new IP address or a new network mask can be specified in the command line arguments of ifconfig to replace the old values of a given network adapter. Additionally, more information is being printed for each adapter.
This commit is contained in:
Marios Prokopakis
GitHub
parent
4c9bb266df
commit
8cf962a102
6 changed files with 155 additions and 49 deletions
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@ -28,6 +28,7 @@
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#include <AK/JsonObject.h>
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#include <AK/String.h>
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#include <AK/Types.h>
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#include <LibCore/ArgsParser.h>
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#include <LibCore/File.h>
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#include <net/if.h>
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#include <netinet/in.h>
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@ -49,66 +50,124 @@ String si_bytes(unsigned bytes)
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int main(int argc, char** argv)
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{
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if (argc == 3) {
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String ifname = argv[1];
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auto address = IPv4Address::from_string(argv[2]);
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const char* value_ipv4 = nullptr;
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const char* value_adapter = nullptr;
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const char* value_gateway = nullptr;
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const char* value_mask = nullptr;
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if (!address.has_value()) {
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fprintf(stderr, "Invalid IPv4 address: '%s'\n", argv[2]);
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Core::ArgsParser args_parser;
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args_parser.add_option(value_ipv4, "Set the IP address of the selected network", "ipv4", 'i', "The new IP of the network");
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args_parser.add_option(value_adapter, "Select a specific network adapter to configure", "adapter", 'a', "The name of a network adapter");
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args_parser.add_option(value_gateway, "Set the default gateway of the selected network", "gateway", 'g', "The new IP of the gateway");
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args_parser.add_option(value_mask, "Set the network mask of the selected network", "mask", 'm', "The new network mask");
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args_parser.parse(argc, argv);
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if (!value_ipv4 && !value_adapter && !value_gateway && !value_mask) {
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auto file = Core::File::construct("/proc/net/adapters");
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if (!file->open(Core::IODevice::ReadOnly)) {
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fprintf(stderr, "Error: %s\n", file->error_string());
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return 1;
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}
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int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
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if (fd < 0) {
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perror("socket");
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auto file_contents = file->read_all();
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auto json = JsonValue::from_string(file_contents).as_array();
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json.for_each([](auto& value) {
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auto if_object = value.as_object();
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auto name = if_object.get("name").to_string();
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auto class_name = if_object.get("class_name").to_string();
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auto mac_address = if_object.get("mac_address").to_string();
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auto ipv4_address = if_object.get("ipv4_address").to_string();
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auto gateway = if_object.get("ipv4_gateway").to_string();
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auto netmask = if_object.get("ipv4_netmask").to_string();
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auto packets_in = if_object.get("packets_in").to_u32();
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auto bytes_in = if_object.get("bytes_in").to_u32();
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auto packets_out = if_object.get("packets_out").to_u32();
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auto bytes_out = if_object.get("bytes_out").to_u32();
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auto mtu = if_object.get("mtu").to_u32();
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printf("%s:\n", name.characters());
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printf("\tmac: %s\n", mac_address.characters());
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printf("\tipv4: %s\n", ipv4_address.characters());
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printf("\tnetmask: %s\n", netmask.characters());
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printf("\tgateway: %s\n", gateway.characters());
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printf("\tclass: %s\n", class_name.characters());
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printf("\tRX: %u packets %u bytes (%s)\n", packets_in, bytes_in, si_bytes(bytes_in).characters());
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printf("\tTX: %u packets %u bytes (%s)\n", packets_out, bytes_out, si_bytes(bytes_out).characters());
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printf("\tMTU: %u\n", mtu);
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printf("\n");
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});
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} else {
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if (!value_adapter) {
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fprintf(stderr, "No network adapter was specified.\n");
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return 1;
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}
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struct ifreq ifr;
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memset(&ifr, 0, sizeof(ifr));
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String ifname = value_adapter;
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strncpy(ifr.ifr_name, ifname.characters(), IFNAMSIZ);
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ifr.ifr_addr.sa_family = AF_INET;
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((sockaddr_in&)ifr.ifr_addr).sin_addr.s_addr = address.value().to_in_addr_t();
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if (value_ipv4) {
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auto address = IPv4Address::from_string(value_ipv4);
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int rc = ioctl(fd, SIOCSIFADDR, &ifr);
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if (rc < 0) {
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perror("ioctl(SIOCSIFADDR)");
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if (!address.has_value()) {
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fprintf(stderr, "Invalid IPv4 address: '%s'\n", value_ipv4);
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return 1;
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}
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int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
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if (fd < 0) {
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perror("socket");
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return 1;
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}
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struct ifreq ifr;
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memset(&ifr, 0, sizeof(ifr));
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strncpy(ifr.ifr_name, ifname.characters(), IFNAMSIZ);
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ifr.ifr_addr.sa_family = AF_INET;
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((sockaddr_in&)ifr.ifr_addr).sin_addr.s_addr = address.value().to_in_addr_t();
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int rc = ioctl(fd, SIOCSIFADDR, &ifr);
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if (rc < 0) {
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perror("ioctl(SIOCSIFADDR)");
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return 1;
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}
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}
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if (value_mask) {
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auto address = IPv4Address::from_string(value_mask);
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if (!address.has_value()) {
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fprintf(stderr, "Invalid IPv4 mask: '%s'\n", value_mask);
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return 1;
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}
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int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
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if (fd < 0) {
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perror("socket");
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return 1;
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}
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struct ifreq ifr;
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memset(&ifr, 0, sizeof(ifr));
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strncpy(ifr.ifr_name, ifname.characters(), IFNAMSIZ);
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ifr.ifr_netmask.sa_family = AF_INET;
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((sockaddr_in&)ifr.ifr_netmask).sin_addr.s_addr = address.value().to_in_addr_t();
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int rc = ioctl(fd, SIOCSIFNETMASK, &ifr);
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if (rc < 0) {
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perror("ioctl(SIOCSIFNETMASK)");
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return 1;
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}
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}
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if (value_gateway) {
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// ioctl does not support rtentry yet
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fprintf(stderr, "Changing the gateway is not supported yet\n");
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return 1;
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}
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return 0;
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}
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auto file = Core::File::construct("/proc/net/adapters");
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if (!file->open(Core::IODevice::ReadOnly)) {
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fprintf(stderr, "Error: %s\n", file->error_string());
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return 1;
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}
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auto file_contents = file->read_all();
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auto json = JsonValue::from_string(file_contents).as_array();
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json.for_each([](auto& value) {
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auto if_object = value.as_object();
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auto name = if_object.get("name").to_string();
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auto class_name = if_object.get("class_name").to_string();
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auto mac_address = if_object.get("mac_address").to_string();
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auto ipv4_address = if_object.get("ipv4_address").to_string();
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auto packets_in = if_object.get("packets_in").to_u32();
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auto bytes_in = if_object.get("bytes_in").to_u32();
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auto packets_out = if_object.get("packets_out").to_u32();
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auto bytes_out = if_object.get("bytes_out").to_u32();
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auto mtu = if_object.get("mtu").to_u32();
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printf("%s:\n", name.characters());
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printf(" mac: %s\n", mac_address.characters());
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printf(" ipv4: %s\n", ipv4_address.characters());
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printf(" class: %s\n", class_name.characters());
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printf(" RX: %u packets %u bytes (%s)\n", packets_in, bytes_in, si_bytes(bytes_in).characters());
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printf(" TX: %u packets %u bytes (%s)\n", packets_out, bytes_out, si_bytes(bytes_out).characters());
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printf(" MTU: %u\n", mtu);
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printf("\n");
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});
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return 0;
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}
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