gistfile1.c

/* Compare an IPv4 backend to a IPv4 addr/len */
static int
vdi_dns_comp_addrinfo4(struct backend *bp, 
		       const struct sockaddr_in *addr,
		       const socklen_t len)
{
	uint32_t u, p;
	struct sockaddr_in *bps = (struct sockaddr_in *) bp->ipv4;

	if (bp->ipv4len != len || len <= 0)
		return 0;

	u = addr->sin_addr.s_addr;
	p = bps->sin_addr.s_addr;

	return u == p;
}

/* Compare an IPv6 backend to a IPv6 addr/len */
static int
vdi_dns_comp_addrinfo6(struct backend *bp,
		       struct sockaddr_in6 *addr,
		       const socklen_t len)
{
	uint8_t *u, *p;
	int i;
	struct sockaddr_in6 *bps = (struct sockaddr_in6 *) bp->ipv6;

	if (bp->ipv6len != len || len <= 0)
		return 0;

	u = addr->sin6_addr.s6_addr;
	p = bps->sin6_addr.s6_addr;

	for (i=0; i < 16; i++) {
		if (u[i] != p[i])
			return 0;
	}

	return 1;
}

struct backend *
vdi_get_backend_if_simple(const struct director *d);

/* Check if a backends socket is the same as addr */
static int
vdi_dns_comp_addrinfo(struct director *dir,
		      struct sockaddr *addr,
		      const socklen_t len)
{
	struct backend *bp;
	int ret = 0;
	bp = vdi_get_backend_if_simple(dir);
	if (bp->ipv4) {
		ret = memcmp(addr, bp->ipv4, len);
		printf("ipv4. ret: %d. len: %d\n", ret, len);
		return !ret;
	}
	if (addr->sa_family == PF_INET && bp->ipv4) {
		return (vdi_dns_comp_addrinfo4(bp, (struct sockaddr_in *)
			addr, len));
	} else if (addr->sa_family == PF_INET6 && bp->ipv6) {
		return (vdi_dns_comp_addrinfo6(bp, (struct sockaddr_in6 *)
			addr, len));
	}
	return 0;
}