예제 #1
0
파일: alias.c 프로젝트: ChaosJohn/freebsd
static int
IcmpAliasIn(struct libalias *la, struct ip *pip)
{
	int iresult;
	struct icmp *ic;

	LIBALIAS_LOCK_ASSERT(la);
/* Return if proxy-only mode is enabled */
	if (la->packetAliasMode & PKT_ALIAS_PROXY_ONLY)
		return (PKT_ALIAS_OK);

	ic = (struct icmp *)ip_next(pip);

	iresult = PKT_ALIAS_IGNORED;
	switch (ic->icmp_type) {
	case ICMP_ECHOREPLY:
	case ICMP_TSTAMPREPLY:
		if (ic->icmp_code == 0) {
			iresult = IcmpAliasIn1(la, pip);
		}
		break;
	case ICMP_UNREACH:
	case ICMP_SOURCEQUENCH:
	case ICMP_TIMXCEED:
	case ICMP_PARAMPROB:
		iresult = IcmpAliasIn2(la, pip);
		break;
	case ICMP_ECHO:
	case ICMP_TSTAMP:
		iresult = IcmpAliasIn1(la, pip);
		break;
	}
	return (iresult);
}
예제 #2
0
static int
IcmpAliasIn(struct ip *pip)
{
    int iresult;
    struct icmp *ic;

/* Return if proxy-only mode is enabled */
    if (packetAliasMode & PKT_ALIAS_PROXY_ONLY)
        return PKT_ALIAS_OK;

    ic = (struct icmp *) ((char *) pip + (pip->ip_hl << 2));

    iresult = PKT_ALIAS_IGNORED;
    switch (ic->icmp_type)
    {
        case ICMP_ECHOREPLY:
        case ICMP_TSTAMPREPLY:
            if (ic->icmp_code == 0)
            {
                iresult = IcmpAliasIn1(pip);
            }
            break;
        case ICMP_UNREACH:
        case ICMP_SOURCEQUENCH:
        case ICMP_TIMXCEED:
        case ICMP_PARAMPROB:
            iresult = IcmpAliasIn2(pip);
            break;
        case ICMP_ECHO:
        case ICMP_TSTAMP:
            iresult = IcmpAliasIn1(pip);
            break;
    }
    return(iresult);
}