zapret/nfq/helpers.c

#define _GNU_SOURCE

#include "helpers.h"
#include <stdio.h>
#include <string.h>
#include <ctype.h>

void print_sockaddr(const struct sockaddr *sa)
{
	char str[64];
	switch (sa->sa_family)
	{
	case AF_INET:
		if (inet_ntop(sa->sa_family, &((struct sockaddr_in*)sa)->sin_addr, str, sizeof(str)))
			printf("%s:%d", str, ntohs(((struct sockaddr_in*)sa)->sin_port));
		break;
	case AF_INET6:
		if (inet_ntop(sa->sa_family, &((struct sockaddr_in6*)sa)->sin6_addr, str, sizeof(str)))
			printf("%s:%d", str, ntohs(((struct sockaddr_in6*)sa)->sin6_port));
		break;
	default:
		printf("UNKNOWN_FAMILY_%d", sa->sa_family);
	}
}

char *strncasestr(const char *s,const char *find, size_t slen)
{
	char c, sc;
	size_t len;

	if ((c = *find++) != '\0')
	{
		len = strlen(find);
		do
		{
			do
			{
				if (slen-- < 1 || (sc = *s++) == '\0') return NULL;
			} while (toupper(c) != toupper(sc));
			if (len > slen)	return NULL;
		} while (strncasecmp(s, find, len) != 0);
		s--;
	}
	return (char *)s;
}