marvell/services/chl/chl_util.c

/******************************************************************************
*(C) Copyright 2015 Marvell International Ltd.
* All Rights Reserved
******************************************************************************/

#include <arpa/inet.h>
#include <stdbool.h>
#include <string.h>
#include <include/log.h>
#include "chl_util.h"

#define INET_PROCF "/proc/net/if_inet6"
#define INET_PROCF_FORMAT \
	" %2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx %*x %x %x %*x %s"

int validate_ip(const char *addr, int family)
{
	unsigned char buf[sizeof(struct in6_addr)];

	if (family != AF_INET6 && family != AF_INET)
		return 1;

	return inet_pton(family, addr, buf) != 1;
}

int get_global_ipv6(const char *ifname, char *addr, int *prefix)
{
	FILE *f;
	int scope, ret = 1;
	unsigned char ipv6[16];
	char dname[16];

	f = fopen(INET_PROCF, "r");
	if (!f) {
		CHL_ERR("failed to open %s\n", INET_PROCF);
		return 1;
	}

	while (fscanf(f, INET_PROCF_FORMAT, &ipv6[0], &ipv6[1],
			&ipv6[2],&ipv6[3], &ipv6[4], &ipv6[5], &ipv6[6],
			&ipv6[7],&ipv6[8], &ipv6[9], &ipv6[10], &ipv6[11],
			&ipv6[12], &ipv6[13], &ipv6[14], &ipv6[15],
			prefix, &scope, dname) != EOF) {

		if (strcmp(ifname, dname))
			continue;

		if (scope)
			continue;

		if (inet_ntop(AF_INET6, ipv6, addr, INET6_ADDRSTRLEN) == NULL)
			continue;

		ret = 0;
		break;
	}

	fclose(f);
	return ret;
}

bool str_starts_with(const char *str, const char *prefix)
{
	size_t lenpre = strlen(prefix), lenstr = strlen(str);
	return lenstr < lenpre ? false : strncasecmp(prefix, str, lenpre) == 0;
}

void cid_to_ccinet(int cid, char *ccinet)
{
	sprintf(ccinet, "ccinet%d", cid - 1);
}

void cid_to_section(int cid, char *wan)
{
	sprintf(wan, "wan%d", cid - 1);
}

void cid_to_section6(int cid, char *wan6)
{
	sprintf(wan6, "wan6%d", cid - 1);
}