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Userland: Basic statistics for ping

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After ping is terminated, the min/avg/max time
as well as information about the number of successful
packets received are printed on the screen.
This commit is contained in:
marprok 2020-11-09 22:23:59 +02:00 committed by Andreas Kling
parent 0058d28a73
commit 5fae567008
Notes: sideshowbarker 2024-07-19 01:28:31 +09:00 
Author: https://github.com/marprok
Commit: https://github.com/SerenityOS/serenity/commit/5fae567008f
Pull-request: https://github.com/SerenityOS/serenity/pull/4011
1 changed files with 51 additions and 5 deletions
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56
Userland/ping.cpp
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@ -29,6 +29,7 @@
#include <netdb.h>
#include <netinet/in.h>
#include <netinet/ip_icmp.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <sys/socket.h>
@ -51,15 +52,20 @@ static uint16_t internet_checksum(const void* ptr, size_t count)
return htons(~checksum);
}
static int total_pings;
static int successful_pings;
static uint32_t total_ms;
static int min_ms;
static int max_ms;
static const char* host;
int main(int argc, char** argv)
{
if (pledge("stdio id inet dns", nullptr) < 0) {
if (pledge("stdio id inet dns sigaction", nullptr) < 0) {
perror("pledge");
return 1;
}
const char* host = nullptr;
Core::ArgsParser args_parser;
args_parser.add_positional_argument(host, "Host to ping", "host");
args_parser.parse(argc, argv);
@ -75,7 +81,7 @@ int main(int argc, char** argv)
return 1;
}
if (pledge("stdio inet dns", nullptr) < 0) {
if (pledge("stdio inet dns sigaction", nullptr) < 0) {
perror("pledge");
return 1;
}
@ -83,6 +89,7 @@ int main(int argc, char** argv)
struct timeval timeout {
1, 0
};
int rc = setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof(timeout));
if (rc < 0) {
perror("setsockopt");
@ -95,7 +102,7 @@ int main(int argc, char** argv)
return 1;
}
if (pledge("stdio inet", nullptr) < 0) {
if (pledge("stdio inet sigaction", nullptr) < 0) {
perror("pledge");
return 1;
}
@ -123,6 +130,29 @@ int main(int argc, char** argv)
uint16_t seq = 1;
sighandler_t ret = signal(SIGINT, [](int) {
int packet_loss = 100;
printf("\n--- %s ping statistics ---\n", host);
if (total_pings)
packet_loss -= 100.0f * successful_pings / total_pings;
printf("%d packets transmitted, %d received, %d%% packet loss\n",
total_pings, successful_pings, packet_loss);
int average_ms = 0;
if (successful_pings)
average_ms = total_ms / successful_pings;
printf("rtt min/avg/max = %d/%d/%d ms\n", min_ms, average_ms, max_ms);
exit(0);
});
if (ret == SIG_ERR) {
perror("failed to install SIGINT handler");
return 1;
}
for (;;) {
PingPacket ping_packet;
memset(&ping_packet, 0, sizeof(PingPacket));
@ -147,6 +177,8 @@ int main(int argc, char** argv)
return 1;
}
total_pings++;
for (;;) {
PongPacket pong_packet;
socklen_t peer_address_size = sizeof(peer_address);
@ -174,6 +206,20 @@ int main(int argc, char** argv)
timersub(&tv_receive, &tv_send, &tv_diff);
int ms = tv_diff.tv_sec * 1000 + tv_diff.tv_usec / 1000;
successful_pings++;
int seq_dif = ntohs(ping_packet.header.un.echo.sequence) - ntohs(pong_packet.header.un.echo.sequence);
// Approximation about the timeout of the out of order packet
if (seq_dif)
ms += seq_dif * 1000 * timeout.tv_sec;
total_ms += ms;
if (min_ms == 0)
min_ms = max_ms = ms;
else if (ms < min_ms)
min_ms = ms;
else if (ms > max_ms)
max_ms = ms;
char addr_buf[64];
printf("Pong from %s: id=%u, seq=%u%s, time=%dms\n",