Convert source IP address from struct iphdr* to string equivalent using Linux netfilter

Question

I want to convert the source & destination IP addresses from a packet captured using netfilter to char *.

In my netfilter hook function, I have:

Answer 1

Try in4_pton() function in net/core/utils.c (definition: https://elixir.bootlin.com/linux/latest/source/net/core/utils.c#L118)

#include 

char source[16];
in4_pton(source, -1, &ip_header->saddr, '\0', NULL);