This patch from Bart Visscher <magick@linux-fan.com> adds
IPV6 support to busybox. This patch does the following:
* Add IPv6 support to libbb
* Enable IPv6 interface address display
* Add IPv6 config option
* Adds ping6, an adaptation of the ping applet for IPv6
* Adds support routines for ping6:
- xgethostbyname2
- create_icmp6_socket
* Adds ifconfig support for IPv6
* Add support IPv6 to netstat
* Add IPv6 support to route
Thanks Bart!
This commit is contained in:
Eric Andersen
515
networking/ping6.c
Normal file
515
networking/ping6.c
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@ -0,0 +1,515 @@
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/* vi: set sw=4 ts=4: */
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/*
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* $Id: ping6.c,v 1.1 2002/07/03 11:46:34 andersen Exp $
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* Mini ping implementation for busybox
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*
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* Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* This version of ping is adapted from the ping in netkit-base 0.10,
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* which is:
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*
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* Copyright (c) 1989 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Mike Muuss.
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*
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* Original copyright notice is retained at the end of this file.
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*
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* This version is an adaptation of ping.c from busybox.
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* The code was modified by Bart Visscher <magick@linux-fan.com>
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*/
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/file.h>
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#include <sys/time.h>
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#include <sys/times.h>
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#include <sys/signal.h>
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#include <netinet/in.h>
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#include <netinet/ip6.h>
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#include <netinet/icmp6.h>
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#include <arpa/inet.h>
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#include <net/if.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stddef.h> /* offsetof */
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#include "busybox.h"
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static const int DEFDATALEN = 56;
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static const int MAXIPLEN = 60;
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static const int MAXICMPLEN = 76;
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static const int MAXPACKET = 65468;
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#define MAX_DUP_CHK (8 * 128)
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static const int MAXWAIT = 10;
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static const int PINGINTERVAL = 1; /* second */
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#define O_QUIET (1 << 0)
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#define O_VERBOSE (1 << 1)
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#define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
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#define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
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#define SET(bit) (A(bit) |= B(bit))
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#define CLR(bit) (A(bit) &= (~B(bit)))
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#define TST(bit) (A(bit) & B(bit))
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static void ping(const char *host);
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/* simple version */
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#ifndef CONFIG_FEATURE_FANCY_PING6
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static void ping(const char *host)
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{
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struct hostent *h;
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struct sockaddr_in6 pingaddr;
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struct icmp6_hdr *pkt;
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int pingsock, c;
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int sockopt;
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char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
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void noresp(int ign)
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{
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printf("No response from %s\n", h->h_name);
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exit(0);
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}
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pingsock = create_icmp6_socket();
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memset(&pingaddr, 0, sizeof(struct sockaddr_in));
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pingaddr.sin6_family = AF_INET6;
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h = xgethostbyname2(host, AF_INET6);
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memcpy(&pingaddr.sin6_addr, h->h_addr, sizeof(pingaddr.sin6_addr));
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pkt = (struct icmp6_hdr *) packet;
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memset(pkt, 0, sizeof(packet));
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pkt->icmp6_type = ICMP6_ECHO_REQUEST;
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sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
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setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, (char *) &sockopt,
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sizeof(sockopt));
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c = sendto(pingsock, packet, sizeof(packet), 0,
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(struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in6));
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if (c < 0 || c != sizeof(packet))
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perror_msg_and_die("sendto");
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signal(SIGALRM, noresp);
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alarm(5); /* give the host 5000ms to respond */
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/* listen for replies */
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while (1) {
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struct sockaddr_in6 from;
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size_t fromlen = sizeof(from);
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if ((c = recvfrom(pingsock, packet, sizeof(packet), 0,
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(struct sockaddr *) &from, &fromlen)) < 0) {
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if (errno == EINTR)
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continue;
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perror_msg("recvfrom");
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continue;
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}
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if (c >= 8) { /* icmp6_hdr */
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pkt = (struct icmp6_hdr *) packet;
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if (pkt->icmp6_type == ICMP6_ECHO_REPLY)
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break;
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}
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}
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printf("%s is alive!\n", h->h_name);
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return;
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}
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extern int ping6_main(int argc, char **argv)
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{
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argc--;
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argv++;
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if (argc < 1)
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show_usage();
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ping(*argv);
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return EXIT_SUCCESS;
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}
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#else /* ! CONFIG_FEATURE_FANCY_PING6 */
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/* full(er) version */
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static struct sockaddr_in6 pingaddr;
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static int pingsock = -1;
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static int datalen; /* intentionally uninitialized to work around gcc bug */
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static char* ifname;
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static long ntransmitted, nreceived, nrepeats, pingcount;
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static int myid, options;
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static unsigned long tmin = ULONG_MAX, tmax, tsum;
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static char rcvd_tbl[MAX_DUP_CHK / 8];
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#if CONFIG_FEATURE_FANCY_PING
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extern
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#endif
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struct hostent *hostent;
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static void sendping(int);
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static void pingstats(int);
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static void unpack(char *, int, struct sockaddr_in6 *, int);
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/**************************************************************************/
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static void pingstats(int junk)
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{
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int status;
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signal(SIGINT, SIG_IGN);
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printf("\n--- %s ping statistics ---\n", hostent->h_name);
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printf("%ld packets transmitted, ", ntransmitted);
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printf("%ld packets received, ", nreceived);
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if (nrepeats)
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printf("%ld duplicates, ", nrepeats);
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if (ntransmitted)
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printf("%ld%% packet loss\n",
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(ntransmitted - nreceived) * 100 / ntransmitted);
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if (nreceived)
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printf("round-trip min/avg/max = %lu.%lu/%lu.%lu/%lu.%lu ms\n",
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tmin / 10, tmin % 10,
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(tsum / (nreceived + nrepeats)) / 10,
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(tsum / (nreceived + nrepeats)) % 10, tmax / 10, tmax % 10);
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if (nreceived != 0)
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status = EXIT_SUCCESS;
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else
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status = EXIT_FAILURE;
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exit(status);
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}
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static void sendping(int junk)
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{
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struct icmp6_hdr *pkt;
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int i;
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char packet[datalen + 8];
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pkt = (struct icmp6_hdr *) packet;
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pkt->icmp6_type = ICMP6_ECHO_REQUEST;
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pkt->icmp6_code = 0;
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pkt->icmp6_cksum = 0;
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pkt->icmp6_seq = ntransmitted++;
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pkt->icmp6_id = myid;
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CLR(pkt->icmp6_seq % MAX_DUP_CHK);
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gettimeofday((struct timeval *) &pkt->icmp6_data8[4], NULL);
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i = sendto(pingsock, packet, sizeof(packet), 0,
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(struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in6));
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if (i < 0)
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perror_msg_and_die("sendto");
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else if ((size_t)i != sizeof(packet))
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error_msg_and_die("ping wrote %d chars; %d expected", i,
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(int)sizeof(packet));
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signal(SIGALRM, sendping);
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if (pingcount == 0 || ntransmitted < pingcount) { /* schedule next in 1s */
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alarm(PINGINTERVAL);
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} else { /* done, wait for the last ping to come back */
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/* todo, don't necessarily need to wait so long... */
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signal(SIGALRM, pingstats);
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alarm(MAXWAIT);
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}
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}
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static char *icmp6_type_name (int id)
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{
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switch (id) {
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case ICMP6_DST_UNREACH: return "Destination Unreachable";
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case ICMP6_PACKET_TOO_BIG: return "Packet too big";
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case ICMP6_TIME_EXCEEDED: return "Time Exceeded";
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case ICMP6_PARAM_PROB: return "Parameter Problem";
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case ICMP6_ECHO_REPLY: return "Echo Reply";
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case ICMP6_ECHO_REQUEST: return "Echo Request";
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case ICMP6_MEMBERSHIP_QUERY: return "Membership Query";
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case ICMP6_MEMBERSHIP_REPORT: return "Membership Report";
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case ICMP6_MEMBERSHIP_REDUCTION: return "Membership Reduction";
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default: return "unknown ICMP type";
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}
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}
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static void unpack(char *packet, int sz, struct sockaddr_in6 *from, int hoplimit)
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{
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struct icmp6_hdr *icmppkt;
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struct timeval tv, *tp;
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int dupflag;
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unsigned long triptime;
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char buf[INET6_ADDRSTRLEN];
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gettimeofday(&tv, NULL);
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/* discard if too short */
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if (sz < (datalen + sizeof(struct icmp6_hdr)))
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return;
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icmppkt = (struct icmp6_hdr *) packet;
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if (icmppkt->icmp6_id != myid)
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return; /* not our ping */
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if (icmppkt->icmp6_type == ICMP6_ECHO_REPLY) {
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++nreceived;
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tp = (struct timeval *) &icmppkt->icmp6_data8[4];
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if ((tv.tv_usec -= tp->tv_usec) < 0) {
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--tv.tv_sec;
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tv.tv_usec += 1000000;
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}
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tv.tv_sec -= tp->tv_sec;
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triptime = tv.tv_sec * 10000 + (tv.tv_usec / 100);
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tsum += triptime;
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if (triptime < tmin)
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tmin = triptime;
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if (triptime > tmax)
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tmax = triptime;
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if (TST(icmppkt->icmp6_seq % MAX_DUP_CHK)) {
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++nrepeats;
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--nreceived;
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dupflag = 1;
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} else {
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SET(icmppkt->icmp6_seq % MAX_DUP_CHK);
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dupflag = 0;
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}
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if (options & O_QUIET)
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return;
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printf("%d bytes from %s: icmp6_seq=%u", sz,
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inet_ntop(AF_INET6, (struct in_addr6 *) &pingaddr.sin6_addr,
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buf, sizeof(buf)),
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icmppkt->icmp6_seq);
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printf(" ttl=%d time=%lu.%lu ms", hoplimit,
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triptime / 10, triptime % 10);
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if (dupflag)
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printf(" (DUP!)");
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printf("\n");
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} else
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if (icmppkt->icmp6_type != ICMP6_ECHO_REQUEST)
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error_msg("Warning: Got ICMP %d (%s)",
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icmppkt->icmp6_type, icmp6_type_name (icmppkt->icmp6_type));
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}
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static void ping(const char *host)
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{
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char packet[datalen + MAXIPLEN + MAXICMPLEN];
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char buf[INET6_ADDRSTRLEN];
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int sockopt;
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struct msghdr msg;
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struct sockaddr_in6 from;
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struct iovec iov;
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char control_buf[CMSG_SPACE(36)];
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pingsock = create_icmp6_socket();
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|
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memset(&pingaddr, 0, sizeof(struct sockaddr_in));
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||||
|
||||
pingaddr.sin6_family = AF_INET6;
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||||
hostent = xgethostbyname2(host, AF_INET6);
|
||||
if (hostent->h_addrtype != AF_INET6)
|
||||
error_msg_and_die("unknown address type; only AF_INET6 is currently supported.");
|
||||
|
||||
memcpy(&pingaddr.sin6_addr, hostent->h_addr, sizeof(pingaddr.sin6_addr));
|
||||
|
||||
#ifdef ICMP6_FILTER
|
||||
{
|
||||
struct icmp6_filter filt;
|
||||
if (!(options & O_VERBOSE)) {
|
||||
ICMP6_FILTER_SETBLOCKALL(&filt);
|
||||
#if 0
|
||||
if ((options & F_FQDN) || (options & F_FQDNOLD) ||
|
||||
(options & F_NODEADDR) || (options & F_SUPTYPES))
|
||||
ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt);
|
||||
else
|
||||
#endif
|
||||
ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
|
||||
} else {
|
||||
ICMP6_FILTER_SETPASSALL(&filt);
|
||||
}
|
||||
if (setsockopt(pingsock, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
|
||||
sizeof(filt)) < 0)
|
||||
error_msg_and_die("setsockopt(ICMP6_FILTER)");
|
||||
}
|
||||
#endif /*ICMP6_FILTER*/
|
||||
|
||||
/* enable broadcast pings */
|
||||
sockopt = 1;
|
||||
setsockopt(pingsock, SOL_SOCKET, SO_BROADCAST, (char *) &sockopt,
|
||||
sizeof(sockopt));
|
||||
|
||||
/* set recv buf for broadcast pings */
|
||||
sockopt = 48 * 1024;
|
||||
setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, (char *) &sockopt,
|
||||
sizeof(sockopt));
|
||||
|
||||
sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
|
||||
setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, (char *) &sockopt,
|
||||
sizeof(sockopt));
|
||||
|
||||
sockopt = 1;
|
||||
setsockopt(pingsock, SOL_IPV6, IPV6_HOPLIMIT, (char *) &sockopt,
|
||||
sizeof(sockopt));
|
||||
|
||||
if (ifname) {
|
||||
if ((pingaddr.sin6_scope_id = if_nametoindex(ifname)) == 0)
|
||||
error_msg_and_die("%s: invalid interface name", ifname);
|
||||
}
|
||||
|
||||
printf("PING %s (%s): %d data bytes\n",
|
||||
hostent->h_name,
|
||||
inet_ntop(AF_INET6, (struct in_addr6 *) &pingaddr.sin6_addr,
|
||||
buf, sizeof(buf)),
|
||||
datalen);
|
||||
|
||||
signal(SIGINT, pingstats);
|
||||
|
||||
/* start the ping's going ... */
|
||||
sendping(0);
|
||||
|
||||
/* listen for replies */
|
||||
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=packet;
|
||||
iov.iov_len=sizeof(packet);
|
||||
while (1) {
|
||||
int c;
|
||||
struct cmsghdr *cmsgptr = NULL;
|
||||
int hoplimit=-1;
|
||||
msg.msg_controllen=sizeof(control_buf);
|
||||
|
||||
if ((c = recvmsg(pingsock, &msg, 0)) < 0) {
|
||||
if (errno == EINTR)
|
||||
continue;
|
||||
perror_msg("recvfrom");
|
||||
continue;
|
||||
}
|
||||
for (cmsgptr = CMSG_FIRSTHDR(&msg); cmsgptr != NULL;
|
||||
cmsgptr = CMSG_NXTHDR(&msg, cmsgptr)) {
|
||||
if (cmsgptr->cmsg_level == SOL_IPV6 &&
|
||||
cmsgptr->cmsg_type == IPV6_HOPLIMIT ) {
|
||||
hoplimit=*(int*)CMSG_DATA(cmsgptr);
|
||||
}
|
||||
}
|
||||
unpack(packet, c, &from, hoplimit);
|
||||
if (pingcount > 0 && nreceived >= pingcount)
|
||||
break;
|
||||
}
|
||||
pingstats(0);
|
||||
}
|
||||
|
||||
extern int ping6_main(int argc, char **argv)
|
||||
{
|
||||
char *thisarg;
|
||||
|
||||
datalen = DEFDATALEN; /* initialized here rather than in global scope to work around gcc bug */
|
||||
|
||||
argc--;
|
||||
argv++;
|
||||
options = 0;
|
||||
/* Parse any options */
|
||||
while (argc >= 1 && **argv == '-') {
|
||||
thisarg = *argv;
|
||||
thisarg++;
|
||||
switch (*thisarg) {
|
||||
case 'v':
|
||||
options &= ~O_QUIET;
|
||||
options |= O_VERBOSE;
|
||||
break;
|
||||
case 'q':
|
||||
options &= ~O_VERBOSE;
|
||||
options |= O_QUIET;
|
||||
break;
|
||||
case 'c':
|
||||
if (--argc <= 0)
|
||||
show_usage();
|
||||
argv++;
|
||||
pingcount = atoi(*argv);
|
||||
break;
|
||||
case 's':
|
||||
if (--argc <= 0)
|
||||
show_usage();
|
||||
argv++;
|
||||
datalen = atoi(*argv);
|
||||
break;
|
||||
case 'I':
|
||||
if (--argc <= 0)
|
||||
show_usage();
|
||||
argv++;
|
||||
ifname = *argv;
|
||||
break;
|
||||
default:
|
||||
show_usage();
|
||||
}
|
||||
argc--;
|
||||
argv++;
|
||||
}
|
||||
if (argc < 1)
|
||||
show_usage();
|
||||
|
||||
myid = getpid() & 0xFFFF;
|
||||
ping(*argv);
|
||||
return EXIT_SUCCESS;
|
||||
}
|
||||
#endif /* ! CONFIG_FEATURE_FANCY_PING6 */
|
||||
|
||||
/*
|
||||
* 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.
|
||||
*/
|
||||
Reference in New Issue
Block a user