[thirdparty/squid.git] / src / icmp / Icmp.cc

/*
 * Copyright (C) 1996-2023 The Squid Software Foundation and contributors
 *
 * Squid software is distributed under GPLv2+ license and includes
 * contributions from numerous individuals and organizations.
 * Please see the COPYING and CONTRIBUTORS files for details.
 */

/* DEBUG: section 37    ICMP Routines */

#include "squid.h"
#include "debug/Stream.h"
#include "Icmp.h"
#include "time/gadgets.h"

Icmp::Icmp()
{
#if USE_ICMP
    icmp_sock = -1;
    icmp_ident = 0;
#endif
}

void
Icmp::Close()
{
#if USE_ICMP
    if (icmp_sock > 0)
        close(icmp_sock);
    icmp_sock = -1;
    icmp_ident = 0;
#endif
}

#if USE_ICMP

int
Icmp::CheckSum(unsigned short *ptr, int size)
{
    long sum;
    unsigned short oddbyte;
    unsigned short answer;

    if (!ptr) return (int)htons(0xffff); // bad input.

    sum = 0;

    while (size > 1) {
        sum += *ptr;
        ++ptr;
        size -= 2;
    }

    if (size == 1) {
        oddbyte = 0;
        *((unsigned char *) &oddbyte) = *(unsigned char *) ptr;
        sum += oddbyte;
    }

    sum = (sum >> 16) + (sum & 0xffff);
    sum += (sum >> 16);
    answer = (unsigned short) ~sum;
    return (answer);
}

int
Icmp::ipHops(int ttl)
{
    if (ttl < 33)
        return 33 - ttl;

    if (ttl < 63)
        return 63 - ttl;        /* 62 = (64+60)/2 */

    if (ttl < 65)
        return 65 - ttl;        /* 62 = (64+60)/2 */

    if (ttl < 129)
        return 129 - ttl;

    if (ttl < 193)
        return 193 - ttl;

    return 256 - ttl;
}

void
Icmp::Log(const Ip::Address &addr, const uint8_t type, const char* pkt_str, const int rtt, const int hops)
{
    debugs(42, 2, "pingerLog: " << current_time << " " << std::left <<
           std::setw(45) << addr  << " " << type  <<
           " " << std::setw(15) << pkt_str << " " << rtt  <<
           "ms " << hops  << " hops");
}

#endif /* USE_ICMP */
Commit	Line	Data
	1	/*
	2	* Copyright (C) 1996-2023 The Squid Software Foundation and contributors
	3	*
	4	* Squid software is distributed under GPLv2+ license and includes
	5	* contributions from numerous individuals and organizations.
	6	* Please see the COPYING and CONTRIBUTORS files for details.
	7	*/
	8
	9	/* DEBUG: section 37 ICMP Routines */
	10
	11	#include "squid.h"
	12	#include "debug/Stream.h"
	13	#include "Icmp.h"
	14	#include "time/gadgets.h"
	15
	16	Icmp::Icmp()
	17	{
	18	#if USE_ICMP
	19	icmp_sock = -1;
	20	icmp_ident = 0;
	21	#endif
	22	}
	23
	24	void
	25	Icmp::Close()
	26	{
	27	#if USE_ICMP
	28	if (icmp_sock > 0)
	29	close(icmp_sock);
	30	icmp_sock = -1;
	31	icmp_ident = 0;
	32	#endif
	33	}
	34
	35	#if USE_ICMP
	36
	37	int
	38	Icmp::CheckSum(unsigned short *ptr, int size)
	39	{
	40	long sum;
	41	unsigned short oddbyte;
	42	unsigned short answer;
	43
	44	if (!ptr) return (int)htons(0xffff); // bad input.
	45
	46	sum = 0;
	47
	48	while (size > 1) {
	49	sum += *ptr;
	50	++ptr;
	51	size -= 2;
	52	}
	53
	54	if (size == 1) {
	55	oddbyte = 0;
	56	((unsigned char ) &oddbyte) = (unsigned char ) ptr;
	57	sum += oddbyte;
	58	}
	59
	60	sum = (sum >> 16) + (sum & 0xffff);
	61	sum += (sum >> 16);
	62	answer = (unsigned short) ~sum;
	63	return (answer);
	64	}
	65
	66	int
	67	Icmp::ipHops(int ttl)
	68	{
	69	if (ttl < 33)
	70	return 33 - ttl;
	71
	72	if (ttl < 63)
	73	return 63 - ttl; /* 62 = (64+60)/2 */
	74
	75	if (ttl < 65)
	76	return 65 - ttl; /* 62 = (64+60)/2 */
	77
	78	if (ttl < 129)
	79	return 129 - ttl;
	80
	81	if (ttl < 193)
	82	return 193 - ttl;
	83
	84	return 256 - ttl;
	85	}
	86
	87	void
	88	Icmp::Log(const Ip::Address &addr, const uint8_t type, const char* pkt_str, const int rtt, const int hops)
	89	{
	90	debugs(42, 2, "pingerLog: " << current_time << " " << std::left <<
	91	std::setw(45) << addr << " " << type <<
	92	" " << std::setw(15) << pkt_str << " " << rtt <<
	93	"ms " << hops << " hops");
	94	}
	95
	96	#endif /* USE_ICMP */
	97