busybox/networking/ping.c

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/* vi: set sw=4 ts=4: */
1999-12-08 04:44:59 +05:30
/*
* Mini ping implementation for busybox
*
* Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
*
2005-12-15 13:34:17 +05:30
* Adapted from the ping in netkit-base 0.10:
1999-12-08 04:44:59 +05:30
* Copyright (c) 1989 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Mike Muuss.
1999-12-08 04:44:59 +05:30
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
1999-12-08 04:44:59 +05:30
*/
/* from ping6.c:
* Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
*
* This version of ping is adapted from the ping in netkit-base 0.10,
* which is:
*
* Original copyright notice is retained at the end of this file.
*
* This version is an adaptation of ping.c from busybox.
* The code was modified by Bart Visscher <magick@linux-fan.com>
*/
//config:config PING
//config: bool "ping (10 kb)"
//config: default y
//config: help
//config: ping uses the ICMP protocol's mandatory ECHO_REQUEST datagram to
//config: elicit an ICMP ECHO_RESPONSE from a host or gateway.
//config:
//config:config PING6
//config: bool "ping6 (11 kb)"
//config: default y
//config: depends on FEATURE_IPV6
//config: help
//config: Alias to "ping -6".
//config:
//config:config FEATURE_FANCY_PING
//config: bool "Enable fancy ping output"
//config: default y
//config: depends on PING || PING6
//config: help
//config: With this option off, ping will say "HOST is alive!"
//config: or terminate with SIGALRM in 5 seconds otherwise.
//config: No command-line options will be recognized.
/* Needs socket(AF_INET, SOCK_RAW, IPPROTO_ICMP), therefore BB_SUID_MAYBE: */
//applet:IF_PING(APPLET(ping, BB_DIR_BIN, BB_SUID_MAYBE))
//applet:IF_PING6(APPLET(ping6, BB_DIR_BIN, BB_SUID_MAYBE))
//kbuild:lib-$(CONFIG_PING) += ping.o
//kbuild:lib-$(CONFIG_PING6) += ping.o
//usage:#if !ENABLE_FEATURE_FANCY_PING
//usage:# define ping_trivial_usage
//usage: "HOST"
//usage:# define ping_full_usage "\n\n"
//usage: "Send ICMP ECHO_REQUESTs to HOST"
//usage:# define ping6_trivial_usage
//usage: "HOST"
//usage:# define ping6_full_usage "\n\n"
//usage: "Send ICMP ECHO_REQUESTs to HOST"
//usage:#else
//usage:# define ping_trivial_usage
//usage: "[OPTIONS] HOST"
//usage:# define ping_full_usage "\n\n"
//usage: "Send ICMP ECHO_REQUESTs to HOST\n"
//usage: IF_PING6(
//usage: "\n -4,-6 Force IP or IPv6 name resolution"
//usage: )
//usage: "\n -c CNT Send only CNT pings"
//usage: "\n -s SIZE Send SIZE data bytes in packets (default 56)"
//usage: "\n -i SECS Interval"
//usage: "\n -A Ping as soon as reply is recevied"
//usage: "\n -t TTL Set TTL"
//usage: "\n -I IFACE/IP Source interface or IP address"
//usage: "\n -W SEC Seconds to wait for the first response (default 10)"
//usage: "\n (after all -c CNT packets are sent)"
//usage: "\n -w SEC Seconds until ping exits (default:infinite)"
//usage: "\n (can exit earlier with -c CNT)"
//usage: "\n -q Quiet, only display output at start/finish"
//usage: "\n -p HEXBYTE Payload pattern"
//usage:
//usage:# define ping6_trivial_usage
//usage: "[OPTIONS] HOST"
//usage:# define ping6_full_usage "\n\n"
//usage: "Send ICMP ECHO_REQUESTs to HOST\n"
//usage: "\n -c CNT Send only CNT pings"
//usage: "\n -s SIZE Send SIZE data bytes in packets (default 56)"
//usage: "\n -i SECS Interval"
//usage: "\n -A Ping as soon as reply is recevied"
///////: "\n -t TTL Set TTL"
///////^^^^^ -t not tested for IPv6, might be not working
//usage: "\n -I IFACE/IP Source interface or IP address"
//usage: "\n -W SEC Seconds to wait for the first response (default 10)"
//usage: "\n (after all -c CNT packets are sent)"
//usage: "\n -w SEC Seconds until ping exits (default:infinite)"
//usage: "\n (can exit earlier with -c CNT)"
//usage: "\n -q Quiet, only display output at start/finish"
//usage: "\n -p HEXBYTE Payload pattern"
//usage:
//usage:#endif
//usage:
//usage:#define ping_example_usage
//usage: "$ ping localhost\n"
//usage: "PING slag (127.0.0.1): 56 data bytes\n"
//usage: "64 bytes from 127.0.0.1: icmp_seq=0 ttl=255 time=20.1 ms\n"
//usage: "\n"
//usage: "--- debian ping statistics ---\n"
//usage: "1 packets transmitted, 1 packets received, 0% packet loss\n"
//usage: "round-trip min/avg/max = 20.1/20.1/20.1 ms\n"
//usage:#define ping6_example_usage
//usage: "$ ping6 ip6-localhost\n"
//usage: "PING ip6-localhost (::1): 56 data bytes\n"
//usage: "64 bytes from ::1: icmp6_seq=0 ttl=64 time=20.1 ms\n"
//usage: "\n"
//usage: "--- ip6-localhost ping statistics ---\n"
//usage: "1 packets transmitted, 1 packets received, 0% packet loss\n"
//usage: "round-trip min/avg/max = 20.1/20.1/20.1 ms\n"
#include <net/if.h>
#if defined(__FreeBSD__)
# include <netinet/in.h> /* struct ip and friends */
# include <netinet/ip.h>
#endif
#include <netinet/ip_icmp.h>
#include "libbb.h"
#include "common_bufsiz.h"
#ifdef __BIONIC__
/* should be in netinet/ip_icmp.h */
# define ICMP_DEST_UNREACH 3 /* Destination Unreachable */
# define ICMP_SOURCE_QUENCH 4 /* Source Quench */
# define ICMP_REDIRECT 5 /* Redirect (change route) */
# define ICMP_ECHO 8 /* Echo Request */
# define ICMP_TIME_EXCEEDED 11 /* Time Exceeded */
# define ICMP_PARAMETERPROB 12 /* Parameter Problem */
# define ICMP_TIMESTAMP 13 /* Timestamp Request */
# define ICMP_TIMESTAMPREPLY 14 /* Timestamp Reply */
# define ICMP_INFO_REQUEST 15 /* Information Request */
# define ICMP_INFO_REPLY 16 /* Information Reply */
# define ICMP_ADDRESS 17 /* Address Mask Request */
# define ICMP_ADDRESSREPLY 18 /* Address Mask Reply */
#endif
/* Some operating systems, like GNU/Hurd, don't define SOL_RAW, but do have
* IPPROTO_RAW. Since the IPPROTO definitions are also valid to use for
* setsockopt (and take the same value as their corresponding SOL definitions,
* if they exist), we can just fall back on IPPROTO_RAW. */
#ifndef SOL_RAW
# define SOL_RAW IPPROTO_RAW
#endif
#if ENABLE_PING6
# include <netinet/icmp6.h>
/* I see RENUMBERED constants in bits/in.h - !!?
* What a fuck is going on with libc? Is it a glibc joke? */
# ifdef IPV6_2292HOPLIMIT
# undef IPV6_HOPLIMIT
# define IPV6_HOPLIMIT IPV6_2292HOPLIMIT
# endif
#endif
1999-12-08 04:44:59 +05:30
#if defined(__FreeBSD__)
/**
* On BSD the IPv4 struct is called struct ip and instead of iXX
* the members are called ip_XX. One could change this code to use
* struct ip but that would require to define _BSD_SOURCE and that
* might have other complications. Instead make sure struct iphdr
* is present on FreeBSD. The below is taken from GLIBC.
*
* The GNU C Library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*/
struct iphdr {
# if BYTE_ORDER == LITTLE_ENDIAN
unsigned int ihl:4;
unsigned int version:4;
# elif BYTE_ORDER == BIG_ENDIAN
unsigned int version:4;
unsigned int ihl:4;
# endif
uint8_t tos;
uint16_t tot_len;
uint16_t id;
uint16_t frag_off;
uint8_t ttl;
uint8_t protocol;
uint16_t check;
uint32_t saddr;
uint32_t daddr;
/*The options start here. */
};
#endif
enum {
DEFDATALEN = 56,
MAXIPLEN = 60,
MAXICMPLEN = 76,
MAX_DUP_CHK = (8 * 128),
MAXWAIT = 10,
PINGINTERVAL = 1, /* 1 second */
pingsock = 0,
};
1999-12-08 04:44:59 +05:30
static void
#if ENABLE_PING6
create_icmp_socket(len_and_sockaddr *lsa)
#else
create_icmp_socket(void)
#define create_icmp_socket(lsa) create_icmp_socket()
#endif
{
int sock;
#if ENABLE_PING6
if (lsa->u.sa.sa_family == AF_INET6)
sock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
else
#endif
sock = socket(AF_INET, SOCK_RAW, 1); /* 1 == ICMP */
if (sock < 0) {
if (errno == EPERM)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die(bb_msg_perm_denied_are_you_root);
bb_simple_perror_msg_and_die(bb_msg_can_not_create_raw_socket);
}
xmove_fd(sock, pingsock);
}
#if !ENABLE_FEATURE_FANCY_PING
/* Simple version */
struct globals {
char *hostname;
char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
ping: populate icmp_id field for "simple" ping too The ICMP RFC says that identifier and sequence number may be zero. Having them zero for a Echo message, along with a data of zero's as well will result in a Echo reply message with only zero's. Some NAT implementations seem to get the checksum wrong on these packages. Setting a checksum of 0x0 instead of 0xffff. Through NAT: Internet Control Message Protocol Type: 0 (Echo (ping) reply) Code: 0 Checksum: 0x0000 [incorrect, should be 0xffff] Identifier (BE): 0 (0x0000) Identifier (LE): 0 (0x0000) Sequence number (BE): 0 (0x0000) Sequence number (LE): 0 (0x0000) Data (56 bytes) Data: 000000000000000000000000000000000000000000000000... [Length: 56] Without NAT: Internet Control Message Protocol Type: 0 (Echo (ping) reply) Code: 0 Checksum: 0xffff [correct] Identifier (BE): 0 (0x0000) Identifier (LE): 0 (0x0000) Sequence number (BE): 0 (0x0000) Sequence number (LE): 0 (0x0000) [Request frame: 189] [Response time: 0.024 ms] Data (56 bytes) Data: 000000000000000000000000000000000000000000000000... [Length: 56] And this in turn will make some hardware MAC checksum offloading engines drop the packet. (This was seen with a Synopsis MAC, the same one used in for instance the stmmac Ethernet driver in the linux kernel.) This change can be seen as a workaround for bugs in other layers. But just setting an identifier for the Echo message packet will avoid prodding the hornets nest. function old new delta common_ping_main 424 500 +76 Signed-off-by: Jonas Danielsson <jonasdn@axis.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-06-23 21:56:32 +05:30
uint16_t myid;
} FIX_ALIASING;
#define G (*(struct globals*)bb_common_bufsiz1)
#define INIT_G() do { setup_common_bufsiz(); } while (0)
2008-07-05 14:48:54 +05:30
static void noresp(int ign UNUSED_PARAM)
{
printf("No response from %s\n", G.hostname);
exit(EXIT_FAILURE);
}
1999-12-11 14:11:28 +05:30
static void ping4(len_and_sockaddr *lsa)
1999-12-11 14:11:28 +05:30
{
struct icmp *pkt;
int c;
pkt = (struct icmp *) G.packet;
/*memset(pkt, 0, sizeof(G.packet)); already is */
pkt->icmp_type = ICMP_ECHO;
ping: populate icmp_id field for "simple" ping too The ICMP RFC says that identifier and sequence number may be zero. Having them zero for a Echo message, along with a data of zero's as well will result in a Echo reply message with only zero's. Some NAT implementations seem to get the checksum wrong on these packages. Setting a checksum of 0x0 instead of 0xffff. Through NAT: Internet Control Message Protocol Type: 0 (Echo (ping) reply) Code: 0 Checksum: 0x0000 [incorrect, should be 0xffff] Identifier (BE): 0 (0x0000) Identifier (LE): 0 (0x0000) Sequence number (BE): 0 (0x0000) Sequence number (LE): 0 (0x0000) Data (56 bytes) Data: 000000000000000000000000000000000000000000000000... [Length: 56] Without NAT: Internet Control Message Protocol Type: 0 (Echo (ping) reply) Code: 0 Checksum: 0xffff [correct] Identifier (BE): 0 (0x0000) Identifier (LE): 0 (0x0000) Sequence number (BE): 0 (0x0000) Sequence number (LE): 0 (0x0000) [Request frame: 189] [Response time: 0.024 ms] Data (56 bytes) Data: 000000000000000000000000000000000000000000000000... [Length: 56] And this in turn will make some hardware MAC checksum offloading engines drop the packet. (This was seen with a Synopsis MAC, the same one used in for instance the stmmac Ethernet driver in the linux kernel.) This change can be seen as a workaround for bugs in other layers. But just setting an identifier for the Echo message packet will avoid prodding the hornets nest. function old new delta common_ping_main 424 500 +76 Signed-off-by: Jonas Danielsson <jonasdn@axis.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-06-23 21:56:32 +05:30
pkt->icmp_id = G.myid;
pkt->icmp_cksum = inet_cksum(pkt, sizeof(G.packet));
xsendto(pingsock, G.packet, DEFDATALEN + ICMP_MINLEN, &lsa->u.sa, lsa->len);
/* listen for replies */
while (1) {
#if 0
struct sockaddr_in from;
socklen_t fromlen = sizeof(from);
c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0,
(struct sockaddr *) &from, &fromlen);
#else
c = recv(pingsock, G.packet, sizeof(G.packet), 0);
#endif
if (c < 0) {
if (errno != EINTR)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_perror_msg("recvfrom");
continue;
}
if (c >= 76) { /* ip + icmp */
struct iphdr *iphdr = (struct iphdr *) G.packet;
pkt = (struct icmp *) (G.packet + (iphdr->ihl << 2)); /* skip ip hdr */
ping: populate icmp_id field for "simple" ping too The ICMP RFC says that identifier and sequence number may be zero. Having them zero for a Echo message, along with a data of zero's as well will result in a Echo reply message with only zero's. Some NAT implementations seem to get the checksum wrong on these packages. Setting a checksum of 0x0 instead of 0xffff. Through NAT: Internet Control Message Protocol Type: 0 (Echo (ping) reply) Code: 0 Checksum: 0x0000 [incorrect, should be 0xffff] Identifier (BE): 0 (0x0000) Identifier (LE): 0 (0x0000) Sequence number (BE): 0 (0x0000) Sequence number (LE): 0 (0x0000) Data (56 bytes) Data: 000000000000000000000000000000000000000000000000... [Length: 56] Without NAT: Internet Control Message Protocol Type: 0 (Echo (ping) reply) Code: 0 Checksum: 0xffff [correct] Identifier (BE): 0 (0x0000) Identifier (LE): 0 (0x0000) Sequence number (BE): 0 (0x0000) Sequence number (LE): 0 (0x0000) [Request frame: 189] [Response time: 0.024 ms] Data (56 bytes) Data: 000000000000000000000000000000000000000000000000... [Length: 56] And this in turn will make some hardware MAC checksum offloading engines drop the packet. (This was seen with a Synopsis MAC, the same one used in for instance the stmmac Ethernet driver in the linux kernel.) This change can be seen as a workaround for bugs in other layers. But just setting an identifier for the Echo message packet will avoid prodding the hornets nest. function old new delta common_ping_main 424 500 +76 Signed-off-by: Jonas Danielsson <jonasdn@axis.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-06-23 21:56:32 +05:30
if (pkt->icmp_id != G.myid)
continue; /* not our ping */
if (pkt->icmp_type == ICMP_ECHOREPLY)
break;
}
1999-12-11 14:11:28 +05:30
}
}
#if ENABLE_PING6
static void ping6(len_and_sockaddr *lsa)
{
struct icmp6_hdr *pkt;
int c;
int sockopt;
pkt = (struct icmp6_hdr *) G.packet;
/*memset(pkt, 0, sizeof(G.packet)); already is */
pkt->icmp6_type = ICMP6_ECHO_REQUEST;
ping: populate icmp_id field for "simple" ping too The ICMP RFC says that identifier and sequence number may be zero. Having them zero for a Echo message, along with a data of zero's as well will result in a Echo reply message with only zero's. Some NAT implementations seem to get the checksum wrong on these packages. Setting a checksum of 0x0 instead of 0xffff. Through NAT: Internet Control Message Protocol Type: 0 (Echo (ping) reply) Code: 0 Checksum: 0x0000 [incorrect, should be 0xffff] Identifier (BE): 0 (0x0000) Identifier (LE): 0 (0x0000) Sequence number (BE): 0 (0x0000) Sequence number (LE): 0 (0x0000) Data (56 bytes) Data: 000000000000000000000000000000000000000000000000... [Length: 56] Without NAT: Internet Control Message Protocol Type: 0 (Echo (ping) reply) Code: 0 Checksum: 0xffff [correct] Identifier (BE): 0 (0x0000) Identifier (LE): 0 (0x0000) Sequence number (BE): 0 (0x0000) Sequence number (LE): 0 (0x0000) [Request frame: 189] [Response time: 0.024 ms] Data (56 bytes) Data: 000000000000000000000000000000000000000000000000... [Length: 56] And this in turn will make some hardware MAC checksum offloading engines drop the packet. (This was seen with a Synopsis MAC, the same one used in for instance the stmmac Ethernet driver in the linux kernel.) This change can be seen as a workaround for bugs in other layers. But just setting an identifier for the Echo message packet will avoid prodding the hornets nest. function old new delta common_ping_main 424 500 +76 Signed-off-by: Jonas Danielsson <jonasdn@axis.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-06-23 21:56:32 +05:30
pkt->icmp6_id = G.myid;
sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
setsockopt_int(pingsock, SOL_RAW, IPV6_CHECKSUM, sockopt);
xsendto(pingsock, G.packet, DEFDATALEN + sizeof(struct icmp6_hdr), &lsa->u.sa, lsa->len);
/* listen for replies */
while (1) {
#if 0
struct sockaddr_in6 from;
socklen_t fromlen = sizeof(from);
c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0,
(struct sockaddr *) &from, &fromlen);
#else
c = recv(pingsock, G.packet, sizeof(G.packet), 0);
#endif
if (c < 0) {
if (errno != EINTR)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_perror_msg("recvfrom");
continue;
}
if (c >= ICMP_MINLEN) { /* icmp6_hdr */
ping: populate icmp_id field for "simple" ping too The ICMP RFC says that identifier and sequence number may be zero. Having them zero for a Echo message, along with a data of zero's as well will result in a Echo reply message with only zero's. Some NAT implementations seem to get the checksum wrong on these packages. Setting a checksum of 0x0 instead of 0xffff. Through NAT: Internet Control Message Protocol Type: 0 (Echo (ping) reply) Code: 0 Checksum: 0x0000 [incorrect, should be 0xffff] Identifier (BE): 0 (0x0000) Identifier (LE): 0 (0x0000) Sequence number (BE): 0 (0x0000) Sequence number (LE): 0 (0x0000) Data (56 bytes) Data: 000000000000000000000000000000000000000000000000... [Length: 56] Without NAT: Internet Control Message Protocol Type: 0 (Echo (ping) reply) Code: 0 Checksum: 0xffff [correct] Identifier (BE): 0 (0x0000) Identifier (LE): 0 (0x0000) Sequence number (BE): 0 (0x0000) Sequence number (LE): 0 (0x0000) [Request frame: 189] [Response time: 0.024 ms] Data (56 bytes) Data: 000000000000000000000000000000000000000000000000... [Length: 56] And this in turn will make some hardware MAC checksum offloading engines drop the packet. (This was seen with a Synopsis MAC, the same one used in for instance the stmmac Ethernet driver in the linux kernel.) This change can be seen as a workaround for bugs in other layers. But just setting an identifier for the Echo message packet will avoid prodding the hornets nest. function old new delta common_ping_main 424 500 +76 Signed-off-by: Jonas Danielsson <jonasdn@axis.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-06-23 21:56:32 +05:30
if (pkt->icmp6_id != G.myid)
continue; /* not our ping */
if (pkt->icmp6_type == ICMP6_ECHO_REPLY)
break;
}
}
}
#endif
#if !ENABLE_PING6
# define common_ping_main(af, argv) common_ping_main(argv)
#endif
static int common_ping_main(sa_family_t af, char **argv)
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{
len_and_sockaddr *lsa;
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INIT_G();
#if ENABLE_PING6
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while ((++argv)[0] && argv[0][0] == '-') {
if (argv[0][1] == '4') {
af = AF_INET;
continue;
}
if (argv[0][1] == '6') {
af = AF_INET6;
continue;
}
bb_show_usage();
}
#else
argv++;
#endif
G.hostname = *argv;
if (!G.hostname)
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bb_show_usage();
#if ENABLE_PING6
lsa = xhost_and_af2sockaddr(G.hostname, 0, af);
#else
lsa = xhost_and_af2sockaddr(G.hostname, 0, AF_INET);
#endif
/* Set timer _after_ DNS resolution */
signal(SIGALRM, noresp);
alarm(5); /* give the host 5000ms to respond */
create_icmp_socket(lsa);
ping: populate icmp_id field for "simple" ping too The ICMP RFC says that identifier and sequence number may be zero. Having them zero for a Echo message, along with a data of zero's as well will result in a Echo reply message with only zero's. Some NAT implementations seem to get the checksum wrong on these packages. Setting a checksum of 0x0 instead of 0xffff. Through NAT: Internet Control Message Protocol Type: 0 (Echo (ping) reply) Code: 0 Checksum: 0x0000 [incorrect, should be 0xffff] Identifier (BE): 0 (0x0000) Identifier (LE): 0 (0x0000) Sequence number (BE): 0 (0x0000) Sequence number (LE): 0 (0x0000) Data (56 bytes) Data: 000000000000000000000000000000000000000000000000... [Length: 56] Without NAT: Internet Control Message Protocol Type: 0 (Echo (ping) reply) Code: 0 Checksum: 0xffff [correct] Identifier (BE): 0 (0x0000) Identifier (LE): 0 (0x0000) Sequence number (BE): 0 (0x0000) Sequence number (LE): 0 (0x0000) [Request frame: 189] [Response time: 0.024 ms] Data (56 bytes) Data: 000000000000000000000000000000000000000000000000... [Length: 56] And this in turn will make some hardware MAC checksum offloading engines drop the packet. (This was seen with a Synopsis MAC, the same one used in for instance the stmmac Ethernet driver in the linux kernel.) This change can be seen as a workaround for bugs in other layers. But just setting an identifier for the Echo message packet will avoid prodding the hornets nest. function old new delta common_ping_main 424 500 +76 Signed-off-by: Jonas Danielsson <jonasdn@axis.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2016-06-23 21:56:32 +05:30
G.myid = (uint16_t) getpid();
/* we can use native-endian ident, but other Unix ping/traceroute
* utils use *big-endian pid*, and e.g. traceroute on our machine may be
* *not* from busybox, idents may collide. Follow the convention:
*/
G.myid = htons(G.myid);
#if ENABLE_PING6
if (lsa->u.sa.sa_family == AF_INET6)
ping6(lsa);
else
#endif
ping4(lsa);
if (ENABLE_FEATURE_CLEAN_UP)
close(pingsock);
printf("%s is alive!\n", G.hostname);
return EXIT_SUCCESS;
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}
#else /* FEATURE_FANCY_PING */
/* Full(er) version */
getopt32: remove opt_complementary function old new delta vgetopt32 1318 1392 +74 runsvdir_main 703 713 +10 bb_make_directory 423 425 +2 collect_cpu 546 545 -1 opt_chars 3 - -3 opt_complementary 4 - -4 tftpd_main 567 562 -5 ntp_init 476 471 -5 zcip_main 1266 1256 -10 xxd_main 428 418 -10 whois_main 140 130 -10 who_main 463 453 -10 which_main 212 202 -10 wget_main 2535 2525 -10 watchdog_main 291 281 -10 watch_main 222 212 -10 vlock_main 399 389 -10 uuencode_main 332 322 -10 uudecode_main 316 306 -10 unlink_main 45 35 -10 udhcpd_main 1482 1472 -10 udhcpc_main 2762 2752 -10 tune2fs_main 290 280 -10 tunctl_main 366 356 -10 truncate_main 218 208 -10 tr_main 518 508 -10 time_main 1134 1124 -10 tftp_main 286 276 -10 telnetd_main 1873 1863 -10 tcpudpsvd_main 1785 1775 -10 taskset_main 521 511 -10 tar_main 1009 999 -10 tail_main 1644 1634 -10 syslogd_main 1967 1957 -10 switch_root_main 368 358 -10 svlogd_main 1454 1444 -10 sv 1296 1286 -10 stat_main 104 94 -10 start_stop_daemon_main 1028 1018 -10 split_main 542 532 -10 sort_main 796 786 -10 slattach_main 624 614 -10 shuf_main 504 494 -10 setsid_main 96 86 -10 setserial_main 1132 1122 -10 setfont_main 388 378 -10 setconsole_main 78 68 -10 sendmail_main 1209 1199 -10 sed_main 677 667 -10 script_main 1077 1067 -10 run_parts_main 325 315 -10 rtcwake_main 454 444 -10 rm_main 175 165 -10 reformime_main 119 109 -10 readlink_main 123 113 -10 rdate_main 246 236 -10 pwdx_main 189 179 -10 pstree_main 317 307 -10 pscan_main 663 653 -10 popmaildir_main 818 808 -10 pmap_main 80 70 -10 nc_main 1042 1032 -10 mv_main 558 548 -10 mountpoint_main 477 467 -10 mount_main 1264 1254 -10 modprobe_main 768 758 -10 modinfo_main 333 323 -10 mktemp_main 200 190 -10 mkswap_main 324 314 -10 mkfs_vfat_main 1489 1479 -10 microcom_main 715 705 -10 md5_sha1_sum_main 521 511 -10 man_main 867 857 -10 makedevs_main 1052 1042 -10 ls_main 563 553 -10 losetup_main 432 422 -10 loadfont_main 89 79 -10 ln_main 524 514 -10 link_main 75 65 -10 ipcalc_main 544 534 -10 iostat_main 2397 2387 -10 install_main 768 758 -10 id_main 480 470 -10 i2cset_main 1239 1229 -10 i2cget_main 380 370 -10 i2cdump_main 1482 1472 -10 i2cdetect_main 682 672 -10 hwclock_main 406 396 -10 httpd_main 741 731 -10 grep_main 837 827 -10 getty_main 1559 1549 -10 fuser_main 297 287 -10 ftpgetput_main 345 335 -10 ftpd_main 2232 2222 -10 fstrim_main 251 241 -10 fsfreeze_main 77 67 -10 fsck_minix_main 2921 2911 -10 flock_main 314 304 -10 flashcp_main 740 730 -10 flash_eraseall_main 833 823 -10 fdformat_main 532 522 -10 expand_main 680 670 -10 eject_main 335 325 -10 dumpleases_main 630 620 -10 du_main 314 304 -10 dos2unix_main 441 431 -10 diff_main 1350 1340 -10 df_main 1064 1054 -10 date_main 1095 1085 -10 cut_main 961 951 -10 cryptpw_main 228 218 -10 crontab_main 575 565 -10 crond_main 1149 1139 -10 cp_main 370 360 -10 common_traceroute_main 3834 3824 -10 common_ping_main 1767 1757 -10 comm_main 239 229 -10 cmp_main 655 645 -10 chrt_main 379 369 -10 chpst_main 704 694 -10 chpasswd_main 308 298 -10 chown_main 171 161 -10 chmod_main 158 148 -10 cat_main 428 418 -10 bzip2_main 120 110 -10 blkdiscard_main 264 254 -10 base64_main 221 211 -10 arping_main 1665 1655 -10 ar_main 556 546 -10 adjtimex_main 406 396 -10 adduser_main 882 872 -10 addgroup_main 411 401 -10 acpid_main 1198 1188 -10 optstring 11 - -11 opt_string 18 - -18 OPT_STR 25 - -25 ubi_tools_main 1288 1258 -30 ls_options 31 - -31 ------------------------------------------------------------------------------ (add/remove: 0/6 grow/shrink: 3/129 up/down: 86/-1383) Total: -1297 bytes text data bss dec hex filename 915428 485 6876 922789 e14a5 busybox_old 914629 485 6872 921986 e1182 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-09 01:25:02 +05:30
/* -c NUM, -t NUM, -w NUM, -W NUM */
#define OPT_STRING "qvAc:+s:t:+w:+W:+I:np:i:4"IF_PING6("6")
enum {
OPT_QUIET = 1 << 0,
OPT_VERBOSE = 1 << 1,
OPT_A = 1 << 2,
OPT_c = 1 << 3,
OPT_s = 1 << 4,
OPT_t = 1 << 5,
OPT_w = 1 << 6,
OPT_W = 1 << 7,
OPT_I = 1 << 8,
/*OPT_n = 1 << 9, - ignored */
OPT_p = 1 << 10,
OPT_i = 1 << 11,
OPT_IPV4 = 1 << 12,
OPT_IPV6 = (1 << 13) * ENABLE_PING6,
};
struct globals {
int if_index;
char *str_I;
len_and_sockaddr *source_lsa;
unsigned datalen;
unsigned pingcount; /* must be int-sized */
unsigned opt_ttl;
unsigned long ntransmitted, nreceived, nrepeats;
uint16_t myid;
uint8_t pattern;
unsigned tmin, tmax; /* in us */
unsigned long long tsum; /* in us, sum of all times */
unsigned cur_us; /* low word only, we don't need more */
unsigned deadline_us;
unsigned interval_us;
unsigned timeout;
unsigned sizeof_rcv_packet;
char *rcv_packet; /* [datalen + MAXIPLEN + MAXICMPLEN] */
void *snd_packet; /* [datalen + ipv4/ipv6_const] */
const char *hostname;
const char *dotted;
union {
struct sockaddr sa;
struct sockaddr_in sin;
#if ENABLE_PING6
struct sockaddr_in6 sin6;
#endif
} pingaddr;
unsigned char rcvd_tbl[MAX_DUP_CHK / 8];
} FIX_ALIASING;
#define G (*(struct globals*)bb_common_bufsiz1)
#define if_index (G.if_index )
#define source_lsa (G.source_lsa )
#define str_I (G.str_I )
#define datalen (G.datalen )
#define pingcount (G.pingcount )
#define opt_ttl (G.opt_ttl )
#define myid (G.myid )
#define tmin (G.tmin )
#define tmax (G.tmax )
#define tsum (G.tsum )
#define timeout (G.timeout )
#define hostname (G.hostname )
#define dotted (G.dotted )
#define pingaddr (G.pingaddr )
#define rcvd_tbl (G.rcvd_tbl )
#define INIT_G() do { \
setup_common_bufsiz(); \
BUILD_BUG_ON(sizeof(G) > COMMON_BUFSIZE); \
datalen = DEFDATALEN; \
timeout = MAXWAIT; \
tmin = UINT_MAX; \
} while (0)
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#define BYTE(bit) rcvd_tbl[(bit)>>3]
#define MASK(bit) (1 << ((bit) & 7))
#define SET(bit) (BYTE(bit) |= MASK(bit))
#define CLR(bit) (BYTE(bit) &= (~MASK(bit)))
#define TST(bit) (BYTE(bit) & MASK(bit))
1999-12-11 14:11:28 +05:30
2008-07-05 14:48:54 +05:30
static void print_stats_and_exit(int junk) NORETURN;
static void print_stats_and_exit(int junk UNUSED_PARAM)
{
unsigned long ul;
unsigned long nrecv;
signal(SIGINT, SIG_IGN);
nrecv = G.nreceived;
printf("\n--- %s ping statistics ---\n"
"%lu packets transmitted, "
"%lu packets received, ",
hostname, G.ntransmitted, nrecv
);
if (G.nrepeats)
printf("%lu duplicates, ", G.nrepeats);
ul = G.ntransmitted;
if (ul != 0)
ul = (ul - nrecv) * 100 / ul;
printf("%lu%% packet loss\n", ul);
if (tmin != UINT_MAX) {
unsigned tavg = tsum / (nrecv + G.nrepeats);
printf("round-trip min/avg/max = %u.%03u/%u.%03u/%u.%03u ms\n",
tmin / 1000, tmin % 1000,
tavg / 1000, tavg % 1000,
tmax / 1000, tmax % 1000);
}
/* if condition is true, exit with 1 -- 'failure' */
exit(nrecv == 0 || (G.deadline_us && nrecv < pingcount));
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}
static void sendping_tail(void (*sp)(int), int size_pkt)
{
int sz;
if (G.deadline_us) {
unsigned n = G.cur_us - G.deadline_us;
if ((int)n >= 0)
print_stats_and_exit(0);
}
CLR((uint16_t)G.ntransmitted % MAX_DUP_CHK);
G.ntransmitted++;
size_pkt += datalen;
/* sizeof(pingaddr) can be larger than real sa size, but I think
* it doesn't matter */
sz = xsendto(pingsock, G.snd_packet, size_pkt, &pingaddr.sa, sizeof(pingaddr));
if (sz != size_pkt)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die(bb_msg_write_error);
if (pingcount == 0 || G.ntransmitted < pingcount) {
/* Didn't send all pings yet - schedule next in -i SEC interval */
struct itimerval i;
signal(SIGALRM, sp);
/*ualarm(G.interval_us, 0); - does not work for >=1sec on some libc */
i.it_interval.tv_sec = 0;
i.it_interval.tv_usec = 0;
i.it_value.tv_sec = G.interval_us / 1000000;
i.it_value.tv_usec = G.interval_us % 1000000;
setitimer(ITIMER_REAL, &i, NULL);
} else { /* -c NN, and all NN are sent */
/* Wait for the last ping to come back.
* -W timeout: wait for a response in seconds.
* Affects only timeout in absence of any responses,
* otherwise ping waits for two RTTs. */
unsigned expire = timeout;
if (G.nreceived) {
/* approx. 2*tmax, in seconds (2 RTT) */
expire = tmax / (512*1024);
if (expire == 0)
expire = 1;
}
signal(SIGALRM, print_stats_and_exit);
alarm(expire);
}
}
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static void sendping4(int junk UNUSED_PARAM)
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{
struct icmp *pkt = G.snd_packet;
memset(pkt, G.pattern, datalen + ICMP_MINLEN + 4);
pkt->icmp_type = ICMP_ECHO;
/*pkt->icmp_code = 0;*/
pkt->icmp_cksum = 0; /* cksum is calculated with this field set to 0 */
pkt->icmp_seq = htons(G.ntransmitted); /* don't ++ here, it can be a macro */
pkt->icmp_id = myid;
/* If datalen < 4, we store timestamp _past_ the packet,
* but it's ok - we allocated 4 extra bytes in xzalloc() just in case.
*/
/*if (datalen >= 4)*/
/* No hton: we'll read it back on the same machine */
*(uint32_t*)&pkt->icmp_dun = G.cur_us = monotonic_us();
pkt->icmp_cksum = inet_cksum(pkt, datalen + ICMP_MINLEN);
sendping_tail(sendping4, ICMP_MINLEN);
}
#if ENABLE_PING6
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static void sendping6(int junk UNUSED_PARAM)
{
struct icmp6_hdr *pkt = G.snd_packet;
memset(pkt, G.pattern, datalen + sizeof(struct icmp6_hdr) + 4);
pkt->icmp6_type = ICMP6_ECHO_REQUEST;
/*pkt->icmp6_code = 0;*/
/*pkt->icmp6_cksum = 0;*/
pkt->icmp6_seq = htons(G.ntransmitted); /* don't ++ here, it can be a macro */
pkt->icmp6_id = myid;
/*if (datalen >= 4)*/
*(bb__aliased_uint32_t*)(&pkt->icmp6_data8[4]) = G.cur_us = monotonic_us();
//TODO? pkt->icmp_cksum = inet_cksum(...);
sendping_tail(sendping6, sizeof(struct icmp6_hdr));
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}
#endif
static const char *icmp_type_name(int id)
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{
switch (id) {
case ICMP_ECHOREPLY: return "Echo Reply";
case ICMP_DEST_UNREACH: return "Destination Unreachable";
case ICMP_SOURCE_QUENCH: return "Source Quench";
case ICMP_REDIRECT: return "Redirect (change route)";
case ICMP_ECHO: return "Echo Request";
case ICMP_TIME_EXCEEDED: return "Time Exceeded";
case ICMP_PARAMETERPROB: return "Parameter Problem";
case ICMP_TIMESTAMP: return "Timestamp Request";
case ICMP_TIMESTAMPREPLY: return "Timestamp Reply";
case ICMP_INFO_REQUEST: return "Information Request";
case ICMP_INFO_REPLY: return "Information Reply";
case ICMP_ADDRESS: return "Address Mask Request";
case ICMP_ADDRESSREPLY: return "Address Mask Reply";
default: return "unknown ICMP type";
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}
}
#if ENABLE_PING6
/* RFC3542 changed some definitions from RFC2292 for no good reason, whee!
* the newer 3542 uses a MLD_ prefix where as 2292 uses ICMP6_ prefix */
#ifndef MLD_LISTENER_QUERY
# define MLD_LISTENER_QUERY ICMP6_MEMBERSHIP_QUERY
#endif
#ifndef MLD_LISTENER_REPORT
# define MLD_LISTENER_REPORT ICMP6_MEMBERSHIP_REPORT
#endif
#ifndef MLD_LISTENER_REDUCTION
# define MLD_LISTENER_REDUCTION ICMP6_MEMBERSHIP_REDUCTION
#endif
static const char *icmp6_type_name(int id)
{
switch (id) {
case ICMP6_DST_UNREACH: return "Destination Unreachable";
case ICMP6_PACKET_TOO_BIG: return "Packet too big";
case ICMP6_TIME_EXCEEDED: return "Time Exceeded";
case ICMP6_PARAM_PROB: return "Parameter Problem";
case ICMP6_ECHO_REPLY: return "Echo Reply";
case ICMP6_ECHO_REQUEST: return "Echo Request";
case MLD_LISTENER_QUERY: return "Listener Query";
case MLD_LISTENER_REPORT: return "Listener Report";
case MLD_LISTENER_REDUCTION: return "Listener Reduction";
default: return "unknown ICMP type";
}
}
#endif
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static void unpack_tail(int sz, uint32_t *tp,
const char *from_str,
uint16_t recv_seq, int ttl)
{
unsigned char *b, m;
const char *dupmsg = " (DUP!)";
unsigned triptime = triptime; /* for gcc */
if (tp) {
/* (int32_t) cast is for hypothetical 64-bit unsigned */
/* (doesn't hurt 32-bit real-world anyway) */
triptime = (int32_t) ((uint32_t)monotonic_us() - *tp);
tsum += triptime;
if (triptime < tmin)
tmin = triptime;
if (triptime > tmax)
tmax = triptime;
}
b = &BYTE(recv_seq % MAX_DUP_CHK);
m = MASK(recv_seq % MAX_DUP_CHK);
/*if TST(recv_seq % MAX_DUP_CHK):*/
if (*b & m) {
++G.nrepeats;
} else {
/*SET(recv_seq % MAX_DUP_CHK):*/
*b |= m;
++G.nreceived;
dupmsg += 7;
}
if (option_mask32 & OPT_QUIET)
return;
printf("%d bytes from %s: seq=%u ttl=%d", sz,
from_str, recv_seq, ttl);
if (tp)
printf(" time=%u.%03u ms", triptime / 1000, triptime % 1000);
puts(dupmsg);
fflush_all();
}
static int unpack4(char *buf, int sz, struct sockaddr_in *from)
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{
struct icmp *icmppkt;
struct iphdr *iphdr;
int hlen;
/* discard if too short */
if (sz < (datalen + ICMP_MINLEN))
return 0;
2006-09-02 21:47:30 +05:30
/* check IP header */
iphdr = (struct iphdr *) buf;
hlen = iphdr->ihl << 2;
sz -= hlen;
icmppkt = (struct icmp *) (buf + hlen);
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if (icmppkt->icmp_id != myid)
return 0; /* not our ping */
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if (icmppkt->icmp_type == ICMP_ECHOREPLY) {
uint16_t recv_seq = ntohs(icmppkt->icmp_seq);
uint32_t *tp = NULL;
if (sz >= ICMP_MINLEN + sizeof(uint32_t))
tp = (uint32_t *) icmppkt->icmp_data;
unpack_tail(sz, tp,
inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr),
recv_seq, iphdr->ttl);
return 1;
}
if (icmppkt->icmp_type != ICMP_ECHO) {
bb_error_msg("warning: got ICMP %d (%s)",
icmppkt->icmp_type,
icmp_type_name(icmppkt->icmp_type));
}
return 0;
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}
#if ENABLE_PING6
static int unpack6(char *packet, int sz, struct sockaddr_in6 *from, int hoplimit)
{
struct icmp6_hdr *icmppkt;
char buf[INET6_ADDRSTRLEN];
/* discard if too short */
if (sz < (datalen + sizeof(struct icmp6_hdr)))
return 0;
icmppkt = (struct icmp6_hdr *) packet;
if (icmppkt->icmp6_id != myid)
return 0; /* not our ping */
if (icmppkt->icmp6_type == ICMP6_ECHO_REPLY) {
uint16_t recv_seq = ntohs(icmppkt->icmp6_seq);
uint32_t *tp = NULL;
if (sz >= sizeof(struct icmp6_hdr) + sizeof(uint32_t))
tp = (uint32_t *) &icmppkt->icmp6_data8[4];
unpack_tail(sz, tp,
inet_ntop(AF_INET6, &from->sin6_addr,
buf, sizeof(buf)),
recv_seq, hoplimit);
return 1;
}
if (icmppkt->icmp6_type != ICMP6_ECHO_REQUEST) {
bb_error_msg("warning: got ICMP %d (%s)",
icmppkt->icmp6_type,
icmp6_type_name(icmppkt->icmp6_type));
}
return 0;
}
#endif
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static void ping4(len_and_sockaddr *lsa)
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{
int sockopt;
pingaddr.sin = lsa->u.sin;
if (source_lsa) {
if (setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_IF,
&source_lsa->u.sa, source_lsa->len))
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die("can't set multicast source interface");
xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
}
2006-09-02 21:47:30 +05:30
/* enable broadcast pings */
setsockopt_broadcast(pingsock);
/* set recv buf (needed if we can get lots of responses: flood ping,
* broadcast ping etc) */
sockopt = (datalen * 2) + 7 * 1024; /* giving it a bit of extra room */
setsockopt_SOL_SOCKET_int(pingsock, SO_RCVBUF, sockopt);
if (opt_ttl != 0) {
setsockopt_int(pingsock, IPPROTO_IP, IP_TTL, opt_ttl);
/* above doesn't affect packets sent to bcast IP, so... */
setsockopt_int(pingsock, IPPROTO_IP, IP_MULTICAST_TTL, opt_ttl);
}
signal(SIGINT, print_stats_and_exit);
/* start the ping's going ... */
send_ping:
sendping4(0);
/* listen for replies */
while (1) {
struct sockaddr_in from;
socklen_t fromlen = (socklen_t) sizeof(from);
int c;
c = recvfrom(pingsock, G.rcv_packet, G.sizeof_rcv_packet, 0,
(struct sockaddr *) &from, &fromlen);
if (c < 0) {
if (errno != EINTR)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_perror_msg("recvfrom");
continue;
}
c = unpack4(G.rcv_packet, c, &from);
if (pingcount && G.nreceived >= pingcount)
break;
if (c && (option_mask32 & OPT_A)) {
goto send_ping;
}
}
1999-12-08 04:44:59 +05:30
}
#if ENABLE_PING6
static void ping6(len_and_sockaddr *lsa)
{
int sockopt;
struct msghdr msg;
struct sockaddr_in6 from;
struct iovec iov;
char control_buf[CMSG_SPACE(36)];
pingaddr.sin6 = lsa->u.sin6;
if (source_lsa)
xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
#ifdef ICMP6_FILTER
{
struct icmp6_filter filt;
if (!(option_mask32 & OPT_VERBOSE)) {
ICMP6_FILTER_SETBLOCKALL(&filt);
ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
} else {
ICMP6_FILTER_SETPASSALL(&filt);
}
if (setsockopt(pingsock, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
sizeof(filt)) < 0)
bb_error_msg_and_die("setsockopt(%s)", "ICMP6_FILTER");
}
#endif /*ICMP6_FILTER*/
/* enable broadcast pings */
setsockopt_broadcast(pingsock);
/* set recv buf (needed if we can get lots of responses: flood ping,
* broadcast ping etc) */
sockopt = (datalen * 2) + 7 * 1024; /* giving it a bit of extra room */
setsockopt_SOL_SOCKET_int(pingsock, SO_RCVBUF, sockopt);
sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
BUILD_BUG_ON(offsetof(struct icmp6_hdr, icmp6_cksum) != 2);
setsockopt_int(pingsock, SOL_RAW, IPV6_CHECKSUM, sockopt);
/* request ttl info to be returned in ancillary data */
setsockopt_1(pingsock, SOL_IPV6, IPV6_HOPLIMIT);
if (if_index)
pingaddr.sin6.sin6_scope_id = if_index;
signal(SIGINT, print_stats_and_exit);
msg.msg_name = &from;
msg.msg_namelen = sizeof(from);
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_control = control_buf;
iov.iov_base = G.rcv_packet;
iov.iov_len = G.sizeof_rcv_packet;
/* start the ping's going ... */
send_ping:
sendping6(0);
/* listen for replies */
while (1) {
int c;
struct cmsghdr *mp;
int hoplimit = -1;
msg.msg_controllen = sizeof(control_buf);
c = recvmsg(pingsock, &msg, 0);
if (c < 0) {
if (errno != EINTR)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_perror_msg("recvfrom");
continue;
}
for (mp = CMSG_FIRSTHDR(&msg); mp; mp = CMSG_NXTHDR(&msg, mp)) {
if (mp->cmsg_level == SOL_IPV6
&& mp->cmsg_type == IPV6_HOPLIMIT
/* don't check len - we trust the kernel: */
/* && mp->cmsg_len >= CMSG_LEN(sizeof(int)) */
) {
/*hoplimit = *(int*)CMSG_DATA(mp); - unaligned access */
move_from_unaligned_int(hoplimit, CMSG_DATA(mp));
}
}
c = unpack6(G.rcv_packet, c, &from, hoplimit);
if (pingcount && G.nreceived >= pingcount)
break;
if (c && (option_mask32 & OPT_A)) {
goto send_ping;
}
}
}
#endif
1999-12-08 04:44:59 +05:30
static void ping(len_and_sockaddr *lsa)
2006-09-02 21:47:30 +05:30
{
printf("PING %s (%s)", hostname, dotted);
if (source_lsa) {
printf(" from %s",
xmalloc_sockaddr2dotted_noport(&source_lsa->u.sa));
2006-09-02 21:47:30 +05:30
}
printf(": %d data bytes\n", datalen);
create_icmp_socket(lsa);
/* untested whether "-I addr" really works for IPv6: */
if (str_I)
setsockopt_bindtodevice(pingsock, str_I);
G.sizeof_rcv_packet = datalen + MAXIPLEN + MAXICMPLEN;
G.rcv_packet = xzalloc(G.sizeof_rcv_packet);
#if ENABLE_PING6
if (lsa->u.sa.sa_family == AF_INET6) {
/* +4 reserves a place for timestamp, which may end up sitting
* _after_ packet. Saves one if() - see sendping4/6() */
G.snd_packet = xzalloc(datalen + sizeof(struct icmp6_hdr) + 4);
ping6(lsa);
} else
#endif
{
G.snd_packet = xzalloc(datalen + ICMP_MINLEN + 4);
ping4(lsa);
}
2006-09-02 21:47:30 +05:30
}
static int common_ping_main(int opt, char **argv)
1999-12-08 04:44:59 +05:30
{
len_and_sockaddr *lsa;
char *str_s, *str_p;
char *str_i = (char*)"1";
duration_t interval;
INIT_G();
getopt32: remove opt_complementary function old new delta vgetopt32 1318 1392 +74 runsvdir_main 703 713 +10 bb_make_directory 423 425 +2 collect_cpu 546 545 -1 opt_chars 3 - -3 opt_complementary 4 - -4 tftpd_main 567 562 -5 ntp_init 476 471 -5 zcip_main 1266 1256 -10 xxd_main 428 418 -10 whois_main 140 130 -10 who_main 463 453 -10 which_main 212 202 -10 wget_main 2535 2525 -10 watchdog_main 291 281 -10 watch_main 222 212 -10 vlock_main 399 389 -10 uuencode_main 332 322 -10 uudecode_main 316 306 -10 unlink_main 45 35 -10 udhcpd_main 1482 1472 -10 udhcpc_main 2762 2752 -10 tune2fs_main 290 280 -10 tunctl_main 366 356 -10 truncate_main 218 208 -10 tr_main 518 508 -10 time_main 1134 1124 -10 tftp_main 286 276 -10 telnetd_main 1873 1863 -10 tcpudpsvd_main 1785 1775 -10 taskset_main 521 511 -10 tar_main 1009 999 -10 tail_main 1644 1634 -10 syslogd_main 1967 1957 -10 switch_root_main 368 358 -10 svlogd_main 1454 1444 -10 sv 1296 1286 -10 stat_main 104 94 -10 start_stop_daemon_main 1028 1018 -10 split_main 542 532 -10 sort_main 796 786 -10 slattach_main 624 614 -10 shuf_main 504 494 -10 setsid_main 96 86 -10 setserial_main 1132 1122 -10 setfont_main 388 378 -10 setconsole_main 78 68 -10 sendmail_main 1209 1199 -10 sed_main 677 667 -10 script_main 1077 1067 -10 run_parts_main 325 315 -10 rtcwake_main 454 444 -10 rm_main 175 165 -10 reformime_main 119 109 -10 readlink_main 123 113 -10 rdate_main 246 236 -10 pwdx_main 189 179 -10 pstree_main 317 307 -10 pscan_main 663 653 -10 popmaildir_main 818 808 -10 pmap_main 80 70 -10 nc_main 1042 1032 -10 mv_main 558 548 -10 mountpoint_main 477 467 -10 mount_main 1264 1254 -10 modprobe_main 768 758 -10 modinfo_main 333 323 -10 mktemp_main 200 190 -10 mkswap_main 324 314 -10 mkfs_vfat_main 1489 1479 -10 microcom_main 715 705 -10 md5_sha1_sum_main 521 511 -10 man_main 867 857 -10 makedevs_main 1052 1042 -10 ls_main 563 553 -10 losetup_main 432 422 -10 loadfont_main 89 79 -10 ln_main 524 514 -10 link_main 75 65 -10 ipcalc_main 544 534 -10 iostat_main 2397 2387 -10 install_main 768 758 -10 id_main 480 470 -10 i2cset_main 1239 1229 -10 i2cget_main 380 370 -10 i2cdump_main 1482 1472 -10 i2cdetect_main 682 672 -10 hwclock_main 406 396 -10 httpd_main 741 731 -10 grep_main 837 827 -10 getty_main 1559 1549 -10 fuser_main 297 287 -10 ftpgetput_main 345 335 -10 ftpd_main 2232 2222 -10 fstrim_main 251 241 -10 fsfreeze_main 77 67 -10 fsck_minix_main 2921 2911 -10 flock_main 314 304 -10 flashcp_main 740 730 -10 flash_eraseall_main 833 823 -10 fdformat_main 532 522 -10 expand_main 680 670 -10 eject_main 335 325 -10 dumpleases_main 630 620 -10 du_main 314 304 -10 dos2unix_main 441 431 -10 diff_main 1350 1340 -10 df_main 1064 1054 -10 date_main 1095 1085 -10 cut_main 961 951 -10 cryptpw_main 228 218 -10 crontab_main 575 565 -10 crond_main 1149 1139 -10 cp_main 370 360 -10 common_traceroute_main 3834 3824 -10 common_ping_main 1767 1757 -10 comm_main 239 229 -10 cmp_main 655 645 -10 chrt_main 379 369 -10 chpst_main 704 694 -10 chpasswd_main 308 298 -10 chown_main 171 161 -10 chmod_main 158 148 -10 cat_main 428 418 -10 bzip2_main 120 110 -10 blkdiscard_main 264 254 -10 base64_main 221 211 -10 arping_main 1665 1655 -10 ar_main 556 546 -10 adjtimex_main 406 396 -10 adduser_main 882 872 -10 addgroup_main 411 401 -10 acpid_main 1198 1188 -10 optstring 11 - -11 opt_string 18 - -18 OPT_STR 25 - -25 ubi_tools_main 1288 1258 -30 ls_options 31 - -31 ------------------------------------------------------------------------------ (add/remove: 0/6 grow/shrink: 3/129 up/down: 86/-1383) Total: -1297 bytes text data bss dec hex filename 915428 485 6876 922789 e14a5 busybox_old 914629 485 6872 921986 e1182 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-09 01:25:02 +05:30
opt |= getopt32(argv, "^"
OPT_STRING
/* exactly one arg; -v and -q don't mix */
"\0" "=1:q--v:v--q",
&pingcount, &str_s, &opt_ttl, &G.deadline_us, &timeout, &str_I, &str_p, &str_i
getopt32: remove opt_complementary function old new delta vgetopt32 1318 1392 +74 runsvdir_main 703 713 +10 bb_make_directory 423 425 +2 collect_cpu 546 545 -1 opt_chars 3 - -3 opt_complementary 4 - -4 tftpd_main 567 562 -5 ntp_init 476 471 -5 zcip_main 1266 1256 -10 xxd_main 428 418 -10 whois_main 140 130 -10 who_main 463 453 -10 which_main 212 202 -10 wget_main 2535 2525 -10 watchdog_main 291 281 -10 watch_main 222 212 -10 vlock_main 399 389 -10 uuencode_main 332 322 -10 uudecode_main 316 306 -10 unlink_main 45 35 -10 udhcpd_main 1482 1472 -10 udhcpc_main 2762 2752 -10 tune2fs_main 290 280 -10 tunctl_main 366 356 -10 truncate_main 218 208 -10 tr_main 518 508 -10 time_main 1134 1124 -10 tftp_main 286 276 -10 telnetd_main 1873 1863 -10 tcpudpsvd_main 1785 1775 -10 taskset_main 521 511 -10 tar_main 1009 999 -10 tail_main 1644 1634 -10 syslogd_main 1967 1957 -10 switch_root_main 368 358 -10 svlogd_main 1454 1444 -10 sv 1296 1286 -10 stat_main 104 94 -10 start_stop_daemon_main 1028 1018 -10 split_main 542 532 -10 sort_main 796 786 -10 slattach_main 624 614 -10 shuf_main 504 494 -10 setsid_main 96 86 -10 setserial_main 1132 1122 -10 setfont_main 388 378 -10 setconsole_main 78 68 -10 sendmail_main 1209 1199 -10 sed_main 677 667 -10 script_main 1077 1067 -10 run_parts_main 325 315 -10 rtcwake_main 454 444 -10 rm_main 175 165 -10 reformime_main 119 109 -10 readlink_main 123 113 -10 rdate_main 246 236 -10 pwdx_main 189 179 -10 pstree_main 317 307 -10 pscan_main 663 653 -10 popmaildir_main 818 808 -10 pmap_main 80 70 -10 nc_main 1042 1032 -10 mv_main 558 548 -10 mountpoint_main 477 467 -10 mount_main 1264 1254 -10 modprobe_main 768 758 -10 modinfo_main 333 323 -10 mktemp_main 200 190 -10 mkswap_main 324 314 -10 mkfs_vfat_main 1489 1479 -10 microcom_main 715 705 -10 md5_sha1_sum_main 521 511 -10 man_main 867 857 -10 makedevs_main 1052 1042 -10 ls_main 563 553 -10 losetup_main 432 422 -10 loadfont_main 89 79 -10 ln_main 524 514 -10 link_main 75 65 -10 ipcalc_main 544 534 -10 iostat_main 2397 2387 -10 install_main 768 758 -10 id_main 480 470 -10 i2cset_main 1239 1229 -10 i2cget_main 380 370 -10 i2cdump_main 1482 1472 -10 i2cdetect_main 682 672 -10 hwclock_main 406 396 -10 httpd_main 741 731 -10 grep_main 837 827 -10 getty_main 1559 1549 -10 fuser_main 297 287 -10 ftpgetput_main 345 335 -10 ftpd_main 2232 2222 -10 fstrim_main 251 241 -10 fsfreeze_main 77 67 -10 fsck_minix_main 2921 2911 -10 flock_main 314 304 -10 flashcp_main 740 730 -10 flash_eraseall_main 833 823 -10 fdformat_main 532 522 -10 expand_main 680 670 -10 eject_main 335 325 -10 dumpleases_main 630 620 -10 du_main 314 304 -10 dos2unix_main 441 431 -10 diff_main 1350 1340 -10 df_main 1064 1054 -10 date_main 1095 1085 -10 cut_main 961 951 -10 cryptpw_main 228 218 -10 crontab_main 575 565 -10 crond_main 1149 1139 -10 cp_main 370 360 -10 common_traceroute_main 3834 3824 -10 common_ping_main 1767 1757 -10 comm_main 239 229 -10 cmp_main 655 645 -10 chrt_main 379 369 -10 chpst_main 704 694 -10 chpasswd_main 308 298 -10 chown_main 171 161 -10 chmod_main 158 148 -10 cat_main 428 418 -10 bzip2_main 120 110 -10 blkdiscard_main 264 254 -10 base64_main 221 211 -10 arping_main 1665 1655 -10 ar_main 556 546 -10 adjtimex_main 406 396 -10 adduser_main 882 872 -10 addgroup_main 411 401 -10 acpid_main 1198 1188 -10 optstring 11 - -11 opt_string 18 - -18 OPT_STR 25 - -25 ubi_tools_main 1288 1258 -30 ls_options 31 - -31 ------------------------------------------------------------------------------ (add/remove: 0/6 grow/shrink: 3/129 up/down: 86/-1383) Total: -1297 bytes text data bss dec hex filename 915428 485 6876 922789 e14a5 busybox_old 914629 485 6872 921986 e1182 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-09 01:25:02 +05:30
);
if (opt & OPT_s)
datalen = xatou16(str_s); // -s
if (opt & OPT_I) { // -I
if_index = if_nametoindex(str_I);
if (!if_index) {
/* TODO: I'm not sure it takes IPv6 unless in [XX:XX..] format */
source_lsa = xdotted2sockaddr(str_I, 0);
str_I = NULL; /* don't try to bind to device later */
}
}
if (opt & OPT_p)
G.pattern = xstrtou_range(str_p, 16, 0, 255);
if (G.deadline_us) {
unsigned d = G.deadline_us < INT_MAX/1000000 ? G.deadline_us : INT_MAX/1000000;
G.deadline_us = 1 | ((d * 1000000) + monotonic_us());
}
interval = parse_duration_str(str_i);
if (interval > INT_MAX/1000000)
interval = INT_MAX/1000000;
G.interval_us = interval * 1000000;
myid = (uint16_t) getpid();
/* we can use native-endian ident, but other Unix ping/traceroute
* utils use *big-endian pid*, and e.g. traceroute on our machine may be
* *not* from busybox, idents may collide. Follow the convention:
*/
myid = htons(myid);
hostname = argv[optind];
#if ENABLE_PING6
{
sa_family_t af = AF_UNSPEC;
if (opt & OPT_IPV4)
af = AF_INET;
if (opt & OPT_IPV6)
af = AF_INET6;
lsa = xhost_and_af2sockaddr(hostname, 0, af);
}
#else
2007-02-04 08:09:08 +05:30
lsa = xhost_and_af2sockaddr(hostname, 0, AF_INET);
#endif
if (source_lsa && source_lsa->u.sa.sa_family != lsa->u.sa.sa_family)
/* leaking it here... */
source_lsa = NULL;
dotted = xmalloc_sockaddr2dotted_noport(&lsa->u.sa);
ping(lsa);
print_stats_and_exit(0);
/*return EXIT_SUCCESS;*/
1999-12-08 04:44:59 +05:30
}
#endif /* FEATURE_FANCY_PING */
#if ENABLE_PING
int ping_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int ping_main(int argc UNUSED_PARAM, char **argv)
{
# if !ENABLE_FEATURE_FANCY_PING
return common_ping_main(AF_UNSPEC, argv);
# else
return common_ping_main(0, argv);
# endif
}
#endif
#if ENABLE_PING6
int ping6_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int ping6_main(int argc UNUSED_PARAM, char **argv)
{
# if !ENABLE_FEATURE_FANCY_PING
return common_ping_main(AF_INET6, argv);
# else
return common_ping_main(OPT_IPV6, argv);
# endif
}
#endif
/* from ping6.c:
* Copyright (c) 1989 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Mike Muuss.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
* ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
*
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/