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LibC+ping: Move internet_checksum to serenity header

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This will be useful for traceroute and any other packet related
application, so this will reduce code duplication.
This commit is contained in:
Idan Horowitz 2021-03-30 21:18:28 +03:00 • committed by Andreas Kling
parent ea34ba6fa6
commit aa6547492e
3 changed files with 19 additions and 15 deletions
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16
Userland/Utilities/ping.cpp
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@ -29,6 +29,7 @@
#include <netdb.h>
#include <netinet/in.h>
#include <netinet/ip_icmp.h>
#include <serenity.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
@ -37,21 +38,6 @@
#include <time.h>
#include <unistd.h>
static uint16_t internet_checksum(const void* ptr, size_t count)
{
uint32_t checksum = 0;
auto* w = (const uint16_t*)ptr;
while (count > 1) {
checksum += ntohs(*w++);
if (checksum & 0x80000000)
checksum = (checksum & 0xffff) | (checksum >> 16);
count -= 2;
}
while (checksum >> 16)
checksum = (checksum & 0xffff) + (checksum >> 16);
return htons(~checksum);
}
static int total_pings;
static int successful_pings;
static uint32_t total_ms;