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75ed262fe5
This defaults to 1500 for all adapters, but LoopbackAdapter increases it to 65536 on construction. If an IPv4 packet is larger than the MTU, we'll need to break it into smaller fragments before transmitting it. This part is a FIXME. :^)
87 lines
2.8 KiB
C++
87 lines
2.8 KiB
C++
#include <AK/JsonArray.h>
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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/CFile.h>
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#include <net/if.h>
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#include <stdio.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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String si_bytes(unsigned bytes)
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{
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if (bytes >= GB)
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return String::format("%fGiB", (double)bytes / (double)GB);
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if (bytes >= MB)
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return String::format("%fMiB", (double)bytes / (double)MB);
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if (bytes >= KB)
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return String::format("%fKiB", (double)bytes / (double)KB);
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return String::format("%dB", bytes);
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}
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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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if (!address.has_value()) {
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fprintf(stderr, "Invalid IPv4 address: '%s'\n", argv[2]);
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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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return 0;
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}
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auto file = CFile::construct("/proc/net/adapters");
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if (!file->open(CIODevice::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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